1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2004, 2007-2012 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
30 #include "call-cmds.h"
31 #include "gdb_regex.h"
32 #include "expression.h"
38 #include "filenames.h" /* for FILENAME_CMP */
39 #include "objc-lang.h"
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 completion_list_add_name (char *, char *, int, char *, char *);
70 static void rbreak_command (char *, int);
72 static void types_info (char *, int);
74 static void functions_info (char *, int);
76 static void variables_info (char *, int);
78 static void sources_info (char *, int);
80 static void output_source_filename (const char *, int *);
82 static int find_line_common (struct linetable
*, int, int *, int);
84 static struct symbol
*lookup_symbol_aux (const char *name
,
85 const struct block
*block
,
86 const domain_enum domain
,
87 enum language language
,
88 int *is_a_field_of_this
);
91 struct symbol
*lookup_symbol_aux_local (const char *name
,
92 const struct block
*block
,
93 const domain_enum domain
,
94 enum language language
);
97 struct symbol
*lookup_symbol_aux_symtabs (int block_index
,
99 const domain_enum domain
);
102 struct symbol
*lookup_symbol_aux_quick (struct objfile
*objfile
,
105 const domain_enum domain
);
107 static void print_msymbol_info (struct minimal_symbol
*);
109 void _initialize_symtab (void);
113 /* Non-zero if a file may be known by two different basenames.
114 This is the uncommon case, and significantly slows down gdb.
115 Default set to "off" to not slow down the common case. */
116 int basenames_may_differ
= 0;
118 /* Allow the user to configure the debugger behavior with respect
119 to multiple-choice menus when more than one symbol matches during
122 const char multiple_symbols_ask
[] = "ask";
123 const char multiple_symbols_all
[] = "all";
124 const char multiple_symbols_cancel
[] = "cancel";
125 static const char *multiple_symbols_modes
[] =
127 multiple_symbols_ask
,
128 multiple_symbols_all
,
129 multiple_symbols_cancel
,
132 static const char *multiple_symbols_mode
= multiple_symbols_all
;
134 /* Read-only accessor to AUTO_SELECT_MODE. */
137 multiple_symbols_select_mode (void)
139 return multiple_symbols_mode
;
142 /* Block in which the most recently searched-for symbol was found.
143 Might be better to make this a parameter to lookup_symbol and
146 const struct block
*block_found
;
148 /* See whether FILENAME matches SEARCH_NAME using the rule that we
149 advertise to the user. (The manual's description of linespecs
150 describes what we advertise). SEARCH_LEN is the length of
151 SEARCH_NAME. We assume that SEARCH_NAME is a relative path.
152 Returns true if they match, false otherwise. */
155 compare_filenames_for_search (const char *filename
, const char *search_name
,
158 int len
= strlen (filename
);
161 if (len
< search_len
)
164 /* The tail of FILENAME must match. */
165 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
168 /* Either the names must completely match, or the character
169 preceding the trailing SEARCH_NAME segment of FILENAME must be a
170 directory separator. */
171 return (len
== search_len
172 || IS_DIR_SEPARATOR (filename
[len
- search_len
- 1])
173 || (HAS_DRIVE_SPEC (filename
)
174 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
177 /* Check for a symtab of a specific name by searching some symtabs.
178 This is a helper function for callbacks of iterate_over_symtabs.
180 The return value, NAME, FULL_PATH, REAL_PATH, CALLBACK, and DATA
181 are identical to the `map_symtabs_matching_filename' method of
182 quick_symbol_functions.
184 FIRST and AFTER_LAST indicate the range of symtabs to search.
185 AFTER_LAST is one past the last symtab to search; NULL means to
186 search until the end of the list. */
189 iterate_over_some_symtabs (const char *name
,
190 const char *full_path
,
191 const char *real_path
,
192 int (*callback
) (struct symtab
*symtab
,
195 struct symtab
*first
,
196 struct symtab
*after_last
)
198 struct symtab
*s
= NULL
;
199 struct cleanup
*cleanup
;
200 const char* base_name
= lbasename (name
);
201 int name_len
= strlen (name
);
202 int is_abs
= IS_ABSOLUTE_PATH (name
);
204 for (s
= first
; s
!= NULL
&& s
!= after_last
; s
= s
->next
)
206 /* Exact match is always ok. */
207 if (FILENAME_CMP (name
, s
->filename
) == 0)
209 if (callback (s
, data
))
213 if (!is_abs
&& compare_filenames_for_search (s
->filename
, name
, name_len
))
215 if (callback (s
, data
))
219 /* Before we invoke realpath, which can get expensive when many
220 files are involved, do a quick comparison of the basenames. */
221 if (! basenames_may_differ
222 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
225 /* If the user gave us an absolute path, try to find the file in
226 this symtab and use its absolute path. */
228 if (full_path
!= NULL
)
230 const char *fp
= symtab_to_fullname (s
);
232 if (fp
!= NULL
&& FILENAME_CMP (full_path
, fp
) == 0)
234 if (callback (s
, data
))
238 if (fp
!= NULL
&& !is_abs
&& compare_filenames_for_search (fp
, name
,
241 if (callback (s
, data
))
246 if (real_path
!= NULL
)
248 char *fullname
= symtab_to_fullname (s
);
250 if (fullname
!= NULL
)
252 char *rp
= gdb_realpath (fullname
);
254 make_cleanup (xfree
, rp
);
255 if (FILENAME_CMP (real_path
, rp
) == 0)
257 if (callback (s
, data
))
261 if (!is_abs
&& compare_filenames_for_search (rp
, name
, name_len
))
263 if (callback (s
, data
))
273 /* Check for a symtab of a specific name; first in symtabs, then in
274 psymtabs. *If* there is no '/' in the name, a match after a '/'
275 in the symtab filename will also work.
277 Calls CALLBACK with each symtab that is found and with the supplied
278 DATA. If CALLBACK returns true, the search stops. */
281 iterate_over_symtabs (const char *name
,
282 int (*callback
) (struct symtab
*symtab
,
286 struct symtab
*s
= NULL
;
287 struct objfile
*objfile
;
288 char *real_path
= NULL
;
289 char *full_path
= NULL
;
290 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
292 /* Here we are interested in canonicalizing an absolute path, not
293 absolutizing a relative path. */
294 if (IS_ABSOLUTE_PATH (name
))
296 full_path
= xfullpath (name
);
297 make_cleanup (xfree
, full_path
);
298 real_path
= gdb_realpath (name
);
299 make_cleanup (xfree
, real_path
);
302 ALL_OBJFILES (objfile
)
304 if (iterate_over_some_symtabs (name
, full_path
, real_path
, callback
, data
,
305 objfile
->symtabs
, NULL
))
307 do_cleanups (cleanups
);
312 /* Same search rules as above apply here, but now we look thru the
315 ALL_OBJFILES (objfile
)
318 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
325 do_cleanups (cleanups
);
330 do_cleanups (cleanups
);
333 /* The callback function used by lookup_symtab. */
336 lookup_symtab_callback (struct symtab
*symtab
, void *data
)
338 struct symtab
**result_ptr
= data
;
340 *result_ptr
= symtab
;
344 /* A wrapper for iterate_over_symtabs that returns the first matching
348 lookup_symtab (const char *name
)
350 struct symtab
*result
= NULL
;
352 iterate_over_symtabs (name
, lookup_symtab_callback
, &result
);
357 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
358 full method name, which consist of the class name (from T), the unadorned
359 method name from METHOD_ID, and the signature for the specific overload,
360 specified by SIGNATURE_ID. Note that this function is g++ specific. */
363 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
365 int mangled_name_len
;
367 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
368 struct fn_field
*method
= &f
[signature_id
];
369 char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
370 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
371 char *newname
= type_name_no_tag (type
);
373 /* Does the form of physname indicate that it is the full mangled name
374 of a constructor (not just the args)? */
375 int is_full_physname_constructor
;
378 int is_destructor
= is_destructor_name (physname
);
379 /* Need a new type prefix. */
380 char *const_prefix
= method
->is_const
? "C" : "";
381 char *volatile_prefix
= method
->is_volatile
? "V" : "";
383 int len
= (newname
== NULL
? 0 : strlen (newname
));
385 /* Nothing to do if physname already contains a fully mangled v3 abi name
386 or an operator name. */
387 if ((physname
[0] == '_' && physname
[1] == 'Z')
388 || is_operator_name (field_name
))
389 return xstrdup (physname
);
391 is_full_physname_constructor
= is_constructor_name (physname
);
393 is_constructor
= is_full_physname_constructor
394 || (newname
&& strcmp (field_name
, newname
) == 0);
397 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
399 if (is_destructor
|| is_full_physname_constructor
)
401 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
402 strcpy (mangled_name
, physname
);
408 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
410 else if (physname
[0] == 't' || physname
[0] == 'Q')
412 /* The physname for template and qualified methods already includes
414 sprintf (buf
, "__%s%s", const_prefix
, volatile_prefix
);
420 sprintf (buf
, "__%s%s%d", const_prefix
, volatile_prefix
, len
);
422 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
423 + strlen (buf
) + len
+ strlen (physname
) + 1);
425 mangled_name
= (char *) xmalloc (mangled_name_len
);
427 mangled_name
[0] = '\0';
429 strcpy (mangled_name
, field_name
);
431 strcat (mangled_name
, buf
);
432 /* If the class doesn't have a name, i.e. newname NULL, then we just
433 mangle it using 0 for the length of the class. Thus it gets mangled
434 as something starting with `::' rather than `classname::'. */
436 strcat (mangled_name
, newname
);
438 strcat (mangled_name
, physname
);
439 return (mangled_name
);
442 /* Initialize the cplus_specific structure. 'cplus_specific' should
443 only be allocated for use with cplus symbols. */
446 symbol_init_cplus_specific (struct general_symbol_info
*gsymbol
,
447 struct objfile
*objfile
)
449 /* A language_specific structure should not have been previously
451 gdb_assert (gsymbol
->language_specific
.cplus_specific
== NULL
);
452 gdb_assert (objfile
!= NULL
);
454 gsymbol
->language_specific
.cplus_specific
=
455 OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct cplus_specific
);
458 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
459 correctly allocated. For C++ symbols a cplus_specific struct is
460 allocated so OBJFILE must not be NULL. If this is a non C++ symbol
461 OBJFILE can be NULL. */
463 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
465 struct objfile
*objfile
)
467 if (gsymbol
->language
== language_cplus
)
469 if (gsymbol
->language_specific
.cplus_specific
== NULL
)
470 symbol_init_cplus_specific (gsymbol
, objfile
);
472 gsymbol
->language_specific
.cplus_specific
->demangled_name
= name
;
475 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
478 /* 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. */
497 symbol_set_language (struct general_symbol_info
*gsymbol
,
498 enum language language
)
500 gsymbol
->language
= language
;
501 if (gsymbol
->language
== language_d
502 || gsymbol
->language
== language_java
503 || gsymbol
->language
== language_objc
504 || gsymbol
->language
== language_fortran
)
506 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
508 else if (gsymbol
->language
== language_cplus
)
509 gsymbol
->language_specific
.cplus_specific
= NULL
;
512 memset (&gsymbol
->language_specific
, 0,
513 sizeof (gsymbol
->language_specific
));
517 /* Functions to initialize a symbol's mangled name. */
519 /* Objects of this type are stored in the demangled name hash table. */
520 struct demangled_name_entry
526 /* Hash function for the demangled name hash. */
528 hash_demangled_name_entry (const void *data
)
530 const struct demangled_name_entry
*e
= data
;
532 return htab_hash_string (e
->mangled
);
535 /* Equality function for the demangled name hash. */
537 eq_demangled_name_entry (const void *a
, const void *b
)
539 const struct demangled_name_entry
*da
= a
;
540 const struct demangled_name_entry
*db
= b
;
542 return strcmp (da
->mangled
, db
->mangled
) == 0;
545 /* Create the hash table used for demangled names. Each hash entry is
546 a pair of strings; one for the mangled name and one for the demangled
547 name. The entry is hashed via just the mangled name. */
550 create_demangled_names_hash (struct objfile
*objfile
)
552 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
553 The hash table code will round this up to the next prime number.
554 Choosing a much larger table size wastes memory, and saves only about
555 1% in symbol reading. */
557 objfile
->demangled_names_hash
= htab_create_alloc
558 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
559 NULL
, xcalloc
, xfree
);
562 /* Try to determine the demangled name for a symbol, based on the
563 language of that symbol. If the language is set to language_auto,
564 it will attempt to find any demangling algorithm that works and
565 then set the language appropriately. The returned name is allocated
566 by the demangler and should be xfree'd. */
569 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
572 char *demangled
= NULL
;
574 if (gsymbol
->language
== language_unknown
)
575 gsymbol
->language
= language_auto
;
577 if (gsymbol
->language
== language_objc
578 || gsymbol
->language
== language_auto
)
581 objc_demangle (mangled
, 0);
582 if (demangled
!= NULL
)
584 gsymbol
->language
= language_objc
;
588 if (gsymbol
->language
== language_cplus
589 || gsymbol
->language
== language_auto
)
592 cplus_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
593 if (demangled
!= NULL
)
595 gsymbol
->language
= language_cplus
;
599 if (gsymbol
->language
== language_java
)
602 cplus_demangle (mangled
,
603 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
604 if (demangled
!= NULL
)
606 gsymbol
->language
= language_java
;
610 if (gsymbol
->language
== language_d
611 || gsymbol
->language
== language_auto
)
613 demangled
= d_demangle(mangled
, 0);
614 if (demangled
!= NULL
)
616 gsymbol
->language
= language_d
;
620 /* We could support `gsymbol->language == language_fortran' here to provide
621 module namespaces also for inferiors with only minimal symbol table (ELF
622 symbols). Just the mangling standard is not standardized across compilers
623 and there is no DW_AT_producer available for inferiors with only the ELF
624 symbols to check the mangling kind. */
628 /* Set both the mangled and demangled (if any) names for GSYMBOL based
629 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
630 objfile's obstack; but if COPY_NAME is 0 and if NAME is
631 NUL-terminated, then this function assumes that NAME is already
632 correctly saved (either permanently or with a lifetime tied to the
633 objfile), and it will not be copied.
635 The hash table corresponding to OBJFILE is used, and the memory
636 comes from that objfile's objfile_obstack. LINKAGE_NAME is copied,
637 so the pointer can be discarded after calling this function. */
639 /* We have to be careful when dealing with Java names: when we run
640 into a Java minimal symbol, we don't know it's a Java symbol, so it
641 gets demangled as a C++ name. This is unfortunate, but there's not
642 much we can do about it: but when demangling partial symbols and
643 regular symbols, we'd better not reuse the wrong demangled name.
644 (See PR gdb/1039.) We solve this by putting a distinctive prefix
645 on Java names when storing them in the hash table. */
647 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
648 don't mind the Java prefix so much: different languages have
649 different demangling requirements, so it's only natural that we
650 need to keep language data around in our demangling cache. But
651 it's not good that the minimal symbol has the wrong demangled name.
652 Unfortunately, I can't think of any easy solution to that
655 #define JAVA_PREFIX "##JAVA$$"
656 #define JAVA_PREFIX_LEN 8
659 symbol_set_names (struct general_symbol_info
*gsymbol
,
660 const char *linkage_name
, int len
, int copy_name
,
661 struct objfile
*objfile
)
663 struct demangled_name_entry
**slot
;
664 /* A 0-terminated copy of the linkage name. */
665 const char *linkage_name_copy
;
666 /* A copy of the linkage name that might have a special Java prefix
667 added to it, for use when looking names up in the hash table. */
668 const char *lookup_name
;
669 /* The length of lookup_name. */
671 struct demangled_name_entry entry
;
673 if (gsymbol
->language
== language_ada
)
675 /* In Ada, we do the symbol lookups using the mangled name, so
676 we can save some space by not storing the demangled name.
678 As a side note, we have also observed some overlap between
679 the C++ mangling and Ada mangling, similarly to what has
680 been observed with Java. Because we don't store the demangled
681 name with the symbol, we don't need to use the same trick
684 gsymbol
->name
= (char *) linkage_name
;
687 gsymbol
->name
= obstack_alloc (&objfile
->objfile_obstack
, len
+ 1);
688 memcpy (gsymbol
->name
, linkage_name
, len
);
689 gsymbol
->name
[len
] = '\0';
691 symbol_set_demangled_name (gsymbol
, NULL
, NULL
);
696 if (objfile
->demangled_names_hash
== NULL
)
697 create_demangled_names_hash (objfile
);
699 /* The stabs reader generally provides names that are not
700 NUL-terminated; most of the other readers don't do this, so we
701 can just use the given copy, unless we're in the Java case. */
702 if (gsymbol
->language
== language_java
)
706 lookup_len
= len
+ JAVA_PREFIX_LEN
;
707 alloc_name
= alloca (lookup_len
+ 1);
708 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
709 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
710 alloc_name
[lookup_len
] = '\0';
712 lookup_name
= alloc_name
;
713 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
715 else if (linkage_name
[len
] != '\0')
720 alloc_name
= alloca (lookup_len
+ 1);
721 memcpy (alloc_name
, linkage_name
, len
);
722 alloc_name
[lookup_len
] = '\0';
724 lookup_name
= alloc_name
;
725 linkage_name_copy
= alloc_name
;
730 lookup_name
= linkage_name
;
731 linkage_name_copy
= linkage_name
;
734 entry
.mangled
= (char *) lookup_name
;
735 slot
= ((struct demangled_name_entry
**)
736 htab_find_slot (objfile
->demangled_names_hash
,
739 /* If this name is not in the hash table, add it. */
742 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
744 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
746 /* Suppose we have demangled_name==NULL, copy_name==0, and
747 lookup_name==linkage_name. In this case, we already have the
748 mangled name saved, and we don't have a demangled name. So,
749 you might think we could save a little space by not recording
750 this in the hash table at all.
752 It turns out that it is actually important to still save such
753 an entry in the hash table, because storing this name gives
754 us better bcache hit rates for partial symbols. */
755 if (!copy_name
&& lookup_name
== linkage_name
)
757 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
758 offsetof (struct demangled_name_entry
,
760 + demangled_len
+ 1);
761 (*slot
)->mangled
= (char *) lookup_name
;
765 /* If we must copy the mangled name, put it directly after
766 the demangled name so we can have a single
768 *slot
= obstack_alloc (&objfile
->objfile_obstack
,
769 offsetof (struct demangled_name_entry
,
771 + lookup_len
+ demangled_len
+ 2);
772 (*slot
)->mangled
= &((*slot
)->demangled
[demangled_len
+ 1]);
773 strcpy ((*slot
)->mangled
, lookup_name
);
776 if (demangled_name
!= NULL
)
778 strcpy ((*slot
)->demangled
, demangled_name
);
779 xfree (demangled_name
);
782 (*slot
)->demangled
[0] = '\0';
785 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
786 if ((*slot
)->demangled
[0] != '\0')
787 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
, objfile
);
789 symbol_set_demangled_name (gsymbol
, NULL
, objfile
);
792 /* Return the source code name of a symbol. In languages where
793 demangling is necessary, this is the demangled name. */
796 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
798 switch (gsymbol
->language
)
804 case language_fortran
:
805 if (symbol_get_demangled_name (gsymbol
) != NULL
)
806 return symbol_get_demangled_name (gsymbol
);
809 if (symbol_get_demangled_name (gsymbol
) != NULL
)
810 return symbol_get_demangled_name (gsymbol
);
812 return ada_decode_symbol (gsymbol
);
817 return gsymbol
->name
;
820 /* Return the demangled name for a symbol based on the language for
821 that symbol. If no demangled name exists, return NULL. */
823 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
825 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
);
847 /* Return the search name of a symbol---generally the demangled or
848 linkage name of the symbol, depending on how it will be searched for.
849 If there is no distinct demangled name, then returns the same value
850 (same pointer) as SYMBOL_LINKAGE_NAME. */
852 symbol_search_name (const struct general_symbol_info
*gsymbol
)
854 if (gsymbol
->language
== language_ada
)
855 return gsymbol
->name
;
857 return symbol_natural_name (gsymbol
);
860 /* Initialize the structure fields to zero values. */
862 init_sal (struct symtab_and_line
*sal
)
870 sal
->explicit_pc
= 0;
871 sal
->explicit_line
= 0;
875 /* Return 1 if the two sections are the same, or if they could
876 plausibly be copies of each other, one in an original object
877 file and another in a separated debug file. */
880 matching_obj_sections (struct obj_section
*obj_first
,
881 struct obj_section
*obj_second
)
883 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
884 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
887 /* If they're the same section, then they match. */
891 /* If either is NULL, give up. */
892 if (first
== NULL
|| second
== NULL
)
895 /* This doesn't apply to absolute symbols. */
896 if (first
->owner
== NULL
|| second
->owner
== NULL
)
899 /* If they're in the same object file, they must be different sections. */
900 if (first
->owner
== second
->owner
)
903 /* Check whether the two sections are potentially corresponding. They must
904 have the same size, address, and name. We can't compare section indexes,
905 which would be more reliable, because some sections may have been
907 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
910 /* In-memory addresses may start at a different offset, relativize them. */
911 if (bfd_get_section_vma (first
->owner
, first
)
912 - bfd_get_start_address (first
->owner
)
913 != bfd_get_section_vma (second
->owner
, second
)
914 - bfd_get_start_address (second
->owner
))
917 if (bfd_get_section_name (first
->owner
, first
) == NULL
918 || bfd_get_section_name (second
->owner
, second
) == NULL
919 || strcmp (bfd_get_section_name (first
->owner
, first
),
920 bfd_get_section_name (second
->owner
, second
)) != 0)
923 /* Otherwise check that they are in corresponding objfiles. */
926 if (obj
->obfd
== first
->owner
)
928 gdb_assert (obj
!= NULL
);
930 if (obj
->separate_debug_objfile
!= NULL
931 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
933 if (obj
->separate_debug_objfile_backlink
!= NULL
934 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
941 find_pc_sect_symtab_via_partial (CORE_ADDR pc
, struct obj_section
*section
)
943 struct objfile
*objfile
;
944 struct minimal_symbol
*msymbol
;
946 /* If we know that this is not a text address, return failure. This is
947 necessary because we loop based on texthigh and textlow, which do
948 not include the data ranges. */
949 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
951 && (MSYMBOL_TYPE (msymbol
) == mst_data
952 || MSYMBOL_TYPE (msymbol
) == mst_bss
953 || MSYMBOL_TYPE (msymbol
) == mst_abs
954 || MSYMBOL_TYPE (msymbol
) == mst_file_data
955 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
958 ALL_OBJFILES (objfile
)
960 struct symtab
*result
= NULL
;
963 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
, msymbol
,
972 /* Debug symbols usually don't have section information. We need to dig that
973 out of the minimal symbols and stash that in the debug symbol. */
976 fixup_section (struct general_symbol_info
*ginfo
,
977 CORE_ADDR addr
, struct objfile
*objfile
)
979 struct minimal_symbol
*msym
;
981 /* First, check whether a minimal symbol with the same name exists
982 and points to the same address. The address check is required
983 e.g. on PowerPC64, where the minimal symbol for a function will
984 point to the function descriptor, while the debug symbol will
985 point to the actual function code. */
986 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
989 ginfo
->obj_section
= SYMBOL_OBJ_SECTION (msym
);
990 ginfo
->section
= SYMBOL_SECTION (msym
);
994 /* Static, function-local variables do appear in the linker
995 (minimal) symbols, but are frequently given names that won't
996 be found via lookup_minimal_symbol(). E.g., it has been
997 observed in frv-uclinux (ELF) executables that a static,
998 function-local variable named "foo" might appear in the
999 linker symbols as "foo.6" or "foo.3". Thus, there is no
1000 point in attempting to extend the lookup-by-name mechanism to
1001 handle this case due to the fact that there can be multiple
1004 So, instead, search the section table when lookup by name has
1005 failed. The ``addr'' and ``endaddr'' fields may have already
1006 been relocated. If so, the relocation offset (i.e. the
1007 ANOFFSET value) needs to be subtracted from these values when
1008 performing the comparison. We unconditionally subtract it,
1009 because, when no relocation has been performed, the ANOFFSET
1010 value will simply be zero.
1012 The address of the symbol whose section we're fixing up HAS
1013 NOT BEEN adjusted (relocated) yet. It can't have been since
1014 the section isn't yet known and knowing the section is
1015 necessary in order to add the correct relocation value. In
1016 other words, we wouldn't even be in this function (attempting
1017 to compute the section) if it were already known.
1019 Note that it is possible to search the minimal symbols
1020 (subtracting the relocation value if necessary) to find the
1021 matching minimal symbol, but this is overkill and much less
1022 efficient. It is not necessary to find the matching minimal
1023 symbol, only its section.
1025 Note that this technique (of doing a section table search)
1026 can fail when unrelocated section addresses overlap. For
1027 this reason, we still attempt a lookup by name prior to doing
1028 a search of the section table. */
1030 struct obj_section
*s
;
1032 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1034 int idx
= s
->the_bfd_section
->index
;
1035 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1037 if (obj_section_addr (s
) - offset
<= addr
1038 && addr
< obj_section_endaddr (s
) - offset
)
1040 ginfo
->obj_section
= s
;
1041 ginfo
->section
= idx
;
1049 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1056 if (SYMBOL_OBJ_SECTION (sym
))
1059 /* We either have an OBJFILE, or we can get at it from the sym's
1060 symtab. Anything else is a bug. */
1061 gdb_assert (objfile
|| SYMBOL_SYMTAB (sym
));
1063 if (objfile
== NULL
)
1064 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
1066 /* We should have an objfile by now. */
1067 gdb_assert (objfile
);
1069 switch (SYMBOL_CLASS (sym
))
1073 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1076 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1080 /* Nothing else will be listed in the minsyms -- no use looking
1085 fixup_section (&sym
->ginfo
, addr
, objfile
);
1090 /* Compute the demangled form of NAME as used by the various symbol
1091 lookup functions. The result is stored in *RESULT_NAME. Returns a
1092 cleanup which can be used to clean up the result.
1094 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1095 Normally, Ada symbol lookups are performed using the encoded name
1096 rather than the demangled name, and so it might seem to make sense
1097 for this function to return an encoded version of NAME.
1098 Unfortunately, we cannot do this, because this function is used in
1099 circumstances where it is not appropriate to try to encode NAME.
1100 For instance, when displaying the frame info, we demangle the name
1101 of each parameter, and then perform a symbol lookup inside our
1102 function using that demangled name. In Ada, certain functions
1103 have internally-generated parameters whose name contain uppercase
1104 characters. Encoding those name would result in those uppercase
1105 characters to become lowercase, and thus cause the symbol lookup
1109 demangle_for_lookup (const char *name
, enum language lang
,
1110 const char **result_name
)
1112 char *demangled_name
= NULL
;
1113 const char *modified_name
= NULL
;
1114 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1116 modified_name
= name
;
1118 /* If we are using C++, D, or Java, demangle the name before doing a
1119 lookup, so we can always binary search. */
1120 if (lang
== language_cplus
)
1122 demangled_name
= cplus_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1125 modified_name
= demangled_name
;
1126 make_cleanup (xfree
, demangled_name
);
1130 /* If we were given a non-mangled name, canonicalize it
1131 according to the language (so far only for C++). */
1132 demangled_name
= cp_canonicalize_string (name
);
1135 modified_name
= demangled_name
;
1136 make_cleanup (xfree
, demangled_name
);
1140 else if (lang
== language_java
)
1142 demangled_name
= cplus_demangle (name
,
1143 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1146 modified_name
= demangled_name
;
1147 make_cleanup (xfree
, demangled_name
);
1150 else if (lang
== language_d
)
1152 demangled_name
= d_demangle (name
, 0);
1155 modified_name
= demangled_name
;
1156 make_cleanup (xfree
, demangled_name
);
1160 *result_name
= modified_name
;
1164 /* Find the definition for a specified symbol name NAME
1165 in domain DOMAIN, visible from lexical block BLOCK.
1166 Returns the struct symbol pointer, or zero if no symbol is found.
1167 C++: if IS_A_FIELD_OF_THIS is nonzero on entry, check to see if
1168 NAME is a field of the current implied argument `this'. If so set
1169 *IS_A_FIELD_OF_THIS to 1, otherwise set it to zero.
1170 BLOCK_FOUND is set to the block in which NAME is found (in the case of
1171 a field of `this', value_of_this sets BLOCK_FOUND to the proper value.) */
1173 /* This function has a bunch of loops in it and it would seem to be
1174 attractive to put in some QUIT's (though I'm not really sure
1175 whether it can run long enough to be really important). But there
1176 are a few calls for which it would appear to be bad news to quit
1177 out of here: find_proc_desc in alpha-tdep.c and mips-tdep.c. (Note
1178 that there is C++ code below which can error(), but that probably
1179 doesn't affect these calls since they are looking for a known
1180 variable and thus can probably assume it will never hit the C++
1184 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1185 const domain_enum domain
, enum language lang
,
1186 int *is_a_field_of_this
)
1188 const char *modified_name
;
1189 struct symbol
*returnval
;
1190 struct cleanup
*cleanup
= demangle_for_lookup (name
, lang
, &modified_name
);
1192 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1193 is_a_field_of_this
);
1194 do_cleanups (cleanup
);
1199 /* Behave like lookup_symbol_in_language, but performed with the
1200 current language. */
1203 lookup_symbol (const char *name
, const struct block
*block
,
1204 domain_enum domain
, int *is_a_field_of_this
)
1206 return lookup_symbol_in_language (name
, block
, domain
,
1207 current_language
->la_language
,
1208 is_a_field_of_this
);
1211 /* Look up the `this' symbol for LANG in BLOCK. Return the symbol if
1212 found, or NULL if not found. */
1215 lookup_language_this (const struct language_defn
*lang
,
1216 const struct block
*block
)
1218 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1225 sym
= lookup_block_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
1228 if (BLOCK_FUNCTION (block
))
1230 block
= BLOCK_SUPERBLOCK (block
);
1236 /* Behave like lookup_symbol except that NAME is the natural name
1237 of the symbol that we're looking for and, if LINKAGE_NAME is
1238 non-NULL, ensure that the symbol's linkage name matches as
1241 static struct symbol
*
1242 lookup_symbol_aux (const char *name
, const struct block
*block
,
1243 const domain_enum domain
, enum language language
,
1244 int *is_a_field_of_this
)
1247 const struct language_defn
*langdef
;
1249 /* Make sure we do something sensible with is_a_field_of_this, since
1250 the callers that set this parameter to some non-null value will
1251 certainly use it later and expect it to be either 0 or 1.
1252 If we don't set it, the contents of is_a_field_of_this are
1254 if (is_a_field_of_this
!= NULL
)
1255 *is_a_field_of_this
= 0;
1257 /* Search specified block and its superiors. Don't search
1258 STATIC_BLOCK or GLOBAL_BLOCK. */
1260 sym
= lookup_symbol_aux_local (name
, block
, domain
, language
);
1264 /* If requested to do so by the caller and if appropriate for LANGUAGE,
1265 check to see if NAME is a field of `this'. */
1267 langdef
= language_def (language
);
1269 if (is_a_field_of_this
!= NULL
)
1271 struct symbol
*sym
= lookup_language_this (langdef
, block
);
1275 struct type
*t
= sym
->type
;
1277 /* I'm not really sure that type of this can ever
1278 be typedefed; just be safe. */
1280 if (TYPE_CODE (t
) == TYPE_CODE_PTR
1281 || TYPE_CODE (t
) == TYPE_CODE_REF
)
1282 t
= TYPE_TARGET_TYPE (t
);
1284 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
1285 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
1286 error (_("Internal error: `%s' is not an aggregate"),
1287 langdef
->la_name_of_this
);
1289 if (check_field (t
, name
))
1291 *is_a_field_of_this
= 1;
1297 /* Now do whatever is appropriate for LANGUAGE to look
1298 up static and global variables. */
1300 sym
= langdef
->la_lookup_symbol_nonlocal (name
, block
, domain
);
1304 /* Now search all static file-level symbols. Not strictly correct,
1305 but more useful than an error. */
1307 return lookup_static_symbol_aux (name
, domain
);
1310 /* Search all static file-level symbols for NAME from DOMAIN. Do the symtabs
1311 first, then check the psymtabs. If a psymtab indicates the existence of the
1312 desired name as a file-level static, then do psymtab-to-symtab conversion on
1313 the fly and return the found symbol. */
1316 lookup_static_symbol_aux (const char *name
, const domain_enum domain
)
1318 struct objfile
*objfile
;
1321 sym
= lookup_symbol_aux_symtabs (STATIC_BLOCK
, name
, domain
);
1325 ALL_OBJFILES (objfile
)
1327 sym
= lookup_symbol_aux_quick (objfile
, STATIC_BLOCK
, name
, domain
);
1335 /* Check to see if the symbol is defined in BLOCK or its superiors.
1336 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
1338 static struct symbol
*
1339 lookup_symbol_aux_local (const char *name
, const struct block
*block
,
1340 const domain_enum domain
,
1341 enum language language
)
1344 const struct block
*static_block
= block_static_block (block
);
1345 const char *scope
= block_scope (block
);
1347 /* Check if either no block is specified or it's a global block. */
1349 if (static_block
== NULL
)
1352 while (block
!= static_block
)
1354 sym
= lookup_symbol_aux_block (name
, block
, domain
);
1358 if (language
== language_cplus
|| language
== language_fortran
)
1360 sym
= cp_lookup_symbol_imports_or_template (scope
, name
, block
,
1366 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
1368 block
= BLOCK_SUPERBLOCK (block
);
1371 /* We've reached the edge of the function without finding a result. */
1376 /* Look up OBJFILE to BLOCK. */
1379 lookup_objfile_from_block (const struct block
*block
)
1381 struct objfile
*obj
;
1387 block
= block_global_block (block
);
1388 /* Go through SYMTABS. */
1389 ALL_SYMTABS (obj
, s
)
1390 if (block
== BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
))
1392 if (obj
->separate_debug_objfile_backlink
)
1393 obj
= obj
->separate_debug_objfile_backlink
;
1401 /* Look up a symbol in a block; if found, fixup the symbol, and set
1402 block_found appropriately. */
1405 lookup_symbol_aux_block (const char *name
, const struct block
*block
,
1406 const domain_enum domain
)
1410 sym
= lookup_block_symbol (block
, name
, domain
);
1413 block_found
= block
;
1414 return fixup_symbol_section (sym
, NULL
);
1420 /* Check all global symbols in OBJFILE in symtabs and
1424 lookup_global_symbol_from_objfile (const struct objfile
*main_objfile
,
1426 const domain_enum domain
)
1428 const struct objfile
*objfile
;
1430 struct blockvector
*bv
;
1431 const struct block
*block
;
1434 for (objfile
= main_objfile
;
1436 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
1438 /* Go through symtabs. */
1439 ALL_OBJFILE_SYMTABS (objfile
, s
)
1441 bv
= BLOCKVECTOR (s
);
1442 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1443 sym
= lookup_block_symbol (block
, name
, domain
);
1446 block_found
= block
;
1447 return fixup_symbol_section (sym
, (struct objfile
*)objfile
);
1451 sym
= lookup_symbol_aux_quick ((struct objfile
*) objfile
, GLOBAL_BLOCK
,
1460 /* Check to see if the symbol is defined in one of the symtabs.
1461 BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
1462 depending on whether or not we want to search global symbols or
1465 static struct symbol
*
1466 lookup_symbol_aux_symtabs (int block_index
, const char *name
,
1467 const domain_enum domain
)
1470 struct objfile
*objfile
;
1471 struct blockvector
*bv
;
1472 const struct block
*block
;
1475 ALL_OBJFILES (objfile
)
1478 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
,
1482 ALL_OBJFILE_SYMTABS (objfile
, s
)
1485 bv
= BLOCKVECTOR (s
);
1486 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
1487 sym
= lookup_block_symbol (block
, name
, domain
);
1490 block_found
= block
;
1491 return fixup_symbol_section (sym
, objfile
);
1499 /* A helper function for lookup_symbol_aux that interfaces with the
1500 "quick" symbol table functions. */
1502 static struct symbol
*
1503 lookup_symbol_aux_quick (struct objfile
*objfile
, int kind
,
1504 const char *name
, const domain_enum domain
)
1506 struct symtab
*symtab
;
1507 struct blockvector
*bv
;
1508 const struct block
*block
;
1513 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, domain
);
1517 bv
= BLOCKVECTOR (symtab
);
1518 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1519 sym
= lookup_block_symbol (block
, name
, domain
);
1522 /* This shouldn't be necessary, but as a last resort try
1523 looking in the statics even though the psymtab claimed
1524 the symbol was global, or vice-versa. It's possible
1525 that the psymtab gets it wrong in some cases. */
1527 /* FIXME: carlton/2002-09-30: Should we really do that?
1528 If that happens, isn't it likely to be a GDB error, in
1529 which case we should fix the GDB error rather than
1530 silently dealing with it here? So I'd vote for
1531 removing the check for the symbol in the other
1533 block
= BLOCKVECTOR_BLOCK (bv
,
1534 kind
== GLOBAL_BLOCK
?
1535 STATIC_BLOCK
: GLOBAL_BLOCK
);
1536 sym
= lookup_block_symbol (block
, name
, domain
);
1539 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
1540 %s may be an inlined function, or may be a template function\n\
1541 (if a template, try specifying an instantiation: %s<type>)."),
1542 kind
== GLOBAL_BLOCK
? "global" : "static",
1543 name
, symtab
->filename
, name
, name
);
1545 return fixup_symbol_section (sym
, objfile
);
1548 /* A default version of lookup_symbol_nonlocal for use by languages
1549 that can't think of anything better to do. This implements the C
1553 basic_lookup_symbol_nonlocal (const char *name
,
1554 const struct block
*block
,
1555 const domain_enum domain
)
1559 /* NOTE: carlton/2003-05-19: The comments below were written when
1560 this (or what turned into this) was part of lookup_symbol_aux;
1561 I'm much less worried about these questions now, since these
1562 decisions have turned out well, but I leave these comments here
1565 /* NOTE: carlton/2002-12-05: There is a question as to whether or
1566 not it would be appropriate to search the current global block
1567 here as well. (That's what this code used to do before the
1568 is_a_field_of_this check was moved up.) On the one hand, it's
1569 redundant with the lookup_symbol_aux_symtabs search that happens
1570 next. On the other hand, if decode_line_1 is passed an argument
1571 like filename:var, then the user presumably wants 'var' to be
1572 searched for in filename. On the third hand, there shouldn't be
1573 multiple global variables all of which are named 'var', and it's
1574 not like decode_line_1 has ever restricted its search to only
1575 global variables in a single filename. All in all, only
1576 searching the static block here seems best: it's correct and it's
1579 /* NOTE: carlton/2002-12-05: There's also a possible performance
1580 issue here: if you usually search for global symbols in the
1581 current file, then it would be slightly better to search the
1582 current global block before searching all the symtabs. But there
1583 are other factors that have a much greater effect on performance
1584 than that one, so I don't think we should worry about that for
1587 sym
= lookup_symbol_static (name
, block
, domain
);
1591 return lookup_symbol_global (name
, block
, domain
);
1594 /* Lookup a symbol in the static block associated to BLOCK, if there
1595 is one; do nothing if BLOCK is NULL or a global block. */
1598 lookup_symbol_static (const char *name
,
1599 const struct block
*block
,
1600 const domain_enum domain
)
1602 const struct block
*static_block
= block_static_block (block
);
1604 if (static_block
!= NULL
)
1605 return lookup_symbol_aux_block (name
, static_block
, domain
);
1610 /* Lookup a symbol in all files' global blocks (searching psymtabs if
1614 lookup_symbol_global (const char *name
,
1615 const struct block
*block
,
1616 const domain_enum domain
)
1618 struct symbol
*sym
= NULL
;
1619 struct objfile
*objfile
= NULL
;
1621 /* Call library-specific lookup procedure. */
1622 objfile
= lookup_objfile_from_block (block
);
1623 if (objfile
!= NULL
)
1624 sym
= solib_global_lookup (objfile
, name
, domain
);
1628 sym
= lookup_symbol_aux_symtabs (GLOBAL_BLOCK
, name
, domain
);
1632 ALL_OBJFILES (objfile
)
1634 sym
= lookup_symbol_aux_quick (objfile
, GLOBAL_BLOCK
, name
, domain
);
1643 symbol_matches_domain (enum language symbol_language
,
1644 domain_enum symbol_domain
,
1647 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
1648 A Java class declaration also defines a typedef for the class.
1649 Similarly, any Ada type declaration implicitly defines a typedef. */
1650 if (symbol_language
== language_cplus
1651 || symbol_language
== language_d
1652 || symbol_language
== language_java
1653 || symbol_language
== language_ada
)
1655 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
1656 && symbol_domain
== STRUCT_DOMAIN
)
1659 /* For all other languages, strict match is required. */
1660 return (symbol_domain
== domain
);
1663 /* Look up a type named NAME in the struct_domain. The type returned
1664 must not be opaque -- i.e., must have at least one field
1668 lookup_transparent_type (const char *name
)
1670 return current_language
->la_lookup_transparent_type (name
);
1673 /* A helper for basic_lookup_transparent_type that interfaces with the
1674 "quick" symbol table functions. */
1676 static struct type
*
1677 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int kind
,
1680 struct symtab
*symtab
;
1681 struct blockvector
*bv
;
1682 struct block
*block
;
1687 symtab
= objfile
->sf
->qf
->lookup_symbol (objfile
, kind
, name
, STRUCT_DOMAIN
);
1691 bv
= BLOCKVECTOR (symtab
);
1692 block
= BLOCKVECTOR_BLOCK (bv
, kind
);
1693 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1696 int other_kind
= kind
== GLOBAL_BLOCK
? STATIC_BLOCK
: GLOBAL_BLOCK
;
1698 /* This shouldn't be necessary, but as a last resort
1699 * try looking in the 'other kind' even though the psymtab
1700 * claimed the symbol was one thing. It's possible that
1701 * the psymtab gets it wrong in some cases.
1703 block
= BLOCKVECTOR_BLOCK (bv
, other_kind
);
1704 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1706 /* FIXME; error is wrong in one case. */
1708 Internal: global symbol `%s' found in %s psymtab but not in symtab.\n\
1709 %s may be an inlined function, or may be a template function\n\
1710 (if a template, try specifying an instantiation: %s<type>)."),
1711 name
, symtab
->filename
, name
, name
);
1713 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1714 return SYMBOL_TYPE (sym
);
1719 /* The standard implementation of lookup_transparent_type. This code
1720 was modeled on lookup_symbol -- the parts not relevant to looking
1721 up types were just left out. In particular it's assumed here that
1722 types are available in struct_domain and only at file-static or
1726 basic_lookup_transparent_type (const char *name
)
1729 struct symtab
*s
= NULL
;
1730 struct blockvector
*bv
;
1731 struct objfile
*objfile
;
1732 struct block
*block
;
1735 /* Now search all the global symbols. Do the symtab's first, then
1736 check the psymtab's. If a psymtab indicates the existence
1737 of the desired name as a global, then do psymtab-to-symtab
1738 conversion on the fly and return the found symbol. */
1740 ALL_OBJFILES (objfile
)
1743 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
,
1745 name
, STRUCT_DOMAIN
);
1747 ALL_OBJFILE_SYMTABS (objfile
, s
)
1750 bv
= BLOCKVECTOR (s
);
1751 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1752 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1753 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1755 return SYMBOL_TYPE (sym
);
1760 ALL_OBJFILES (objfile
)
1762 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
1767 /* Now search the static file-level symbols.
1768 Not strictly correct, but more useful than an error.
1769 Do the symtab's first, then
1770 check the psymtab's. If a psymtab indicates the existence
1771 of the desired name as a file-level static, then do psymtab-to-symtab
1772 conversion on the fly and return the found symbol. */
1774 ALL_OBJFILES (objfile
)
1777 objfile
->sf
->qf
->pre_expand_symtabs_matching (objfile
, STATIC_BLOCK
,
1778 name
, STRUCT_DOMAIN
);
1780 ALL_OBJFILE_SYMTABS (objfile
, s
)
1782 bv
= BLOCKVECTOR (s
);
1783 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
1784 sym
= lookup_block_symbol (block
, name
, STRUCT_DOMAIN
);
1785 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
1787 return SYMBOL_TYPE (sym
);
1792 ALL_OBJFILES (objfile
)
1794 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
1799 return (struct type
*) 0;
1803 /* Find the name of the file containing main(). */
1804 /* FIXME: What about languages without main() or specially linked
1805 executables that have no main() ? */
1808 find_main_filename (void)
1810 struct objfile
*objfile
;
1811 char *name
= main_name ();
1813 ALL_OBJFILES (objfile
)
1819 result
= objfile
->sf
->qf
->find_symbol_file (objfile
, name
);
1826 /* Search BLOCK for symbol NAME in DOMAIN.
1828 Note that if NAME is the demangled form of a C++ symbol, we will fail
1829 to find a match during the binary search of the non-encoded names, but
1830 for now we don't worry about the slight inefficiency of looking for
1831 a match we'll never find, since it will go pretty quick. Once the
1832 binary search terminates, we drop through and do a straight linear
1833 search on the symbols. Each symbol which is marked as being a ObjC/C++
1834 symbol (language_cplus or language_objc set) has both the encoded and
1835 non-encoded names tested for a match. */
1838 lookup_block_symbol (const struct block
*block
, const char *name
,
1839 const domain_enum domain
)
1841 struct dict_iterator iter
;
1844 if (!BLOCK_FUNCTION (block
))
1846 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1848 sym
= dict_iter_name_next (name
, &iter
))
1850 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1851 SYMBOL_DOMAIN (sym
), domain
))
1858 /* Note that parameter symbols do not always show up last in the
1859 list; this loop makes sure to take anything else other than
1860 parameter symbols first; it only uses parameter symbols as a
1861 last resort. Note that this only takes up extra computation
1864 struct symbol
*sym_found
= NULL
;
1866 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1868 sym
= dict_iter_name_next (name
, &iter
))
1870 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1871 SYMBOL_DOMAIN (sym
), domain
))
1874 if (!SYMBOL_IS_ARGUMENT (sym
))
1880 return (sym_found
); /* Will be NULL if not found. */
1884 /* Iterate over the symbols named NAME, matching DOMAIN, starting with
1887 For each symbol that matches, CALLBACK is called. The symbol and
1888 DATA are passed to the callback.
1890 If CALLBACK returns zero, the iteration ends. Otherwise, the
1891 search continues. This function iterates upward through blocks.
1892 When the outermost block has been finished, the function
1896 iterate_over_symbols (const struct block
*block
, const char *name
,
1897 const domain_enum domain
,
1898 int (*callback
) (struct symbol
*, void *),
1903 struct dict_iterator iter
;
1906 for (sym
= dict_iter_name_first (BLOCK_DICT (block
), name
, &iter
);
1908 sym
= dict_iter_name_next (name
, &iter
))
1910 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1911 SYMBOL_DOMAIN (sym
), domain
))
1913 if (!callback (sym
, data
))
1918 block
= BLOCK_SUPERBLOCK (block
);
1922 /* Find the symtab associated with PC and SECTION. Look through the
1923 psymtabs and read in another symtab if necessary. */
1926 find_pc_sect_symtab (CORE_ADDR pc
, struct obj_section
*section
)
1929 struct blockvector
*bv
;
1930 struct symtab
*s
= NULL
;
1931 struct symtab
*best_s
= NULL
;
1932 struct objfile
*objfile
;
1933 struct program_space
*pspace
;
1934 CORE_ADDR distance
= 0;
1935 struct minimal_symbol
*msymbol
;
1937 pspace
= current_program_space
;
1939 /* If we know that this is not a text address, return failure. This is
1940 necessary because we loop based on the block's high and low code
1941 addresses, which do not include the data ranges, and because
1942 we call find_pc_sect_psymtab which has a similar restriction based
1943 on the partial_symtab's texthigh and textlow. */
1944 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1946 && (MSYMBOL_TYPE (msymbol
) == mst_data
1947 || MSYMBOL_TYPE (msymbol
) == mst_bss
1948 || MSYMBOL_TYPE (msymbol
) == mst_abs
1949 || MSYMBOL_TYPE (msymbol
) == mst_file_data
1950 || MSYMBOL_TYPE (msymbol
) == mst_file_bss
))
1953 /* Search all symtabs for the one whose file contains our address, and which
1954 is the smallest of all the ones containing the address. This is designed
1955 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
1956 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
1957 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
1959 This happens for native ecoff format, where code from included files
1960 gets its own symtab. The symtab for the included file should have
1961 been read in already via the dependency mechanism.
1962 It might be swifter to create several symtabs with the same name
1963 like xcoff does (I'm not sure).
1965 It also happens for objfiles that have their functions reordered.
1966 For these, the symtab we are looking for is not necessarily read in. */
1968 ALL_PRIMARY_SYMTABS (objfile
, s
)
1970 bv
= BLOCKVECTOR (s
);
1971 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
1973 if (BLOCK_START (b
) <= pc
1974 && BLOCK_END (b
) > pc
1976 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
1978 /* For an objfile that has its functions reordered,
1979 find_pc_psymtab will find the proper partial symbol table
1980 and we simply return its corresponding symtab. */
1981 /* In order to better support objfiles that contain both
1982 stabs and coff debugging info, we continue on if a psymtab
1984 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
1986 struct symtab
*result
;
1989 = objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
1998 struct dict_iterator iter
;
1999 struct symbol
*sym
= NULL
;
2001 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2003 fixup_symbol_section (sym
, objfile
);
2004 if (matching_obj_sections (SYMBOL_OBJ_SECTION (sym
), section
))
2008 continue; /* No symbol in this symtab matches
2011 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2019 ALL_OBJFILES (objfile
)
2021 struct symtab
*result
;
2025 result
= objfile
->sf
->qf
->find_pc_sect_symtab (objfile
,
2036 /* Find the symtab associated with PC. Look through the psymtabs and read
2037 in another symtab if necessary. Backward compatibility, no section. */
2040 find_pc_symtab (CORE_ADDR pc
)
2042 return find_pc_sect_symtab (pc
, find_pc_mapped_section (pc
));
2046 /* Find the source file and line number for a given PC value and SECTION.
2047 Return a structure containing a symtab pointer, a line number,
2048 and a pc range for the entire source line.
2049 The value's .pc field is NOT the specified pc.
2050 NOTCURRENT nonzero means, if specified pc is on a line boundary,
2051 use the line that ends there. Otherwise, in that case, the line
2052 that begins there is used. */
2054 /* The big complication here is that a line may start in one file, and end just
2055 before the start of another file. This usually occurs when you #include
2056 code in the middle of a subroutine. To properly find the end of a line's PC
2057 range, we must search all symtabs associated with this compilation unit, and
2058 find the one whose first PC is closer than that of the next line in this
2061 /* If it's worth the effort, we could be using a binary search. */
2063 struct symtab_and_line
2064 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
2067 struct linetable
*l
;
2070 struct linetable_entry
*item
;
2071 struct symtab_and_line val
;
2072 struct blockvector
*bv
;
2073 struct minimal_symbol
*msymbol
;
2074 struct minimal_symbol
*mfunsym
;
2075 struct objfile
*objfile
;
2077 /* Info on best line seen so far, and where it starts, and its file. */
2079 struct linetable_entry
*best
= NULL
;
2080 CORE_ADDR best_end
= 0;
2081 struct symtab
*best_symtab
= 0;
2083 /* Store here the first line number
2084 of a file which contains the line at the smallest pc after PC.
2085 If we don't find a line whose range contains PC,
2086 we will use a line one less than this,
2087 with a range from the start of that file to the first line's pc. */
2088 struct linetable_entry
*alt
= NULL
;
2089 struct symtab
*alt_symtab
= 0;
2091 /* Info on best line seen in this file. */
2093 struct linetable_entry
*prev
;
2095 /* If this pc is not from the current frame,
2096 it is the address of the end of a call instruction.
2097 Quite likely that is the start of the following statement.
2098 But what we want is the statement containing the instruction.
2099 Fudge the pc to make sure we get that. */
2101 init_sal (&val
); /* initialize to zeroes */
2103 val
.pspace
= current_program_space
;
2105 /* It's tempting to assume that, if we can't find debugging info for
2106 any function enclosing PC, that we shouldn't search for line
2107 number info, either. However, GAS can emit line number info for
2108 assembly files --- very helpful when debugging hand-written
2109 assembly code. In such a case, we'd have no debug info for the
2110 function, but we would have line info. */
2115 /* elz: added this because this function returned the wrong
2116 information if the pc belongs to a stub (import/export)
2117 to call a shlib function. This stub would be anywhere between
2118 two functions in the target, and the line info was erroneously
2119 taken to be the one of the line before the pc. */
2121 /* RT: Further explanation:
2123 * We have stubs (trampolines) inserted between procedures.
2125 * Example: "shr1" exists in a shared library, and a "shr1" stub also
2126 * exists in the main image.
2128 * In the minimal symbol table, we have a bunch of symbols
2129 * sorted by start address. The stubs are marked as "trampoline",
2130 * the others appear as text. E.g.:
2132 * Minimal symbol table for main image
2133 * main: code for main (text symbol)
2134 * shr1: stub (trampoline symbol)
2135 * foo: code for foo (text symbol)
2137 * Minimal symbol table for "shr1" image:
2139 * shr1: code for shr1 (text symbol)
2142 * So the code below is trying to detect if we are in the stub
2143 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
2144 * and if found, do the symbolization from the real-code address
2145 * rather than the stub address.
2147 * Assumptions being made about the minimal symbol table:
2148 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
2149 * if we're really in the trampoline.s If we're beyond it (say
2150 * we're in "foo" in the above example), it'll have a closer
2151 * symbol (the "foo" text symbol for example) and will not
2152 * return the trampoline.
2153 * 2. lookup_minimal_symbol_text() will find a real text symbol
2154 * corresponding to the trampoline, and whose address will
2155 * be different than the trampoline address. I put in a sanity
2156 * check for the address being the same, to avoid an
2157 * infinite recursion.
2159 msymbol
= lookup_minimal_symbol_by_pc (pc
);
2160 if (msymbol
!= NULL
)
2161 if (MSYMBOL_TYPE (msymbol
) == mst_solib_trampoline
)
2163 mfunsym
= lookup_minimal_symbol_text (SYMBOL_LINKAGE_NAME (msymbol
),
2165 if (mfunsym
== NULL
)
2166 /* I eliminated this warning since it is coming out
2167 * in the following situation:
2168 * gdb shmain // test program with shared libraries
2169 * (gdb) break shr1 // function in shared lib
2170 * Warning: In stub for ...
2171 * In the above situation, the shared lib is not loaded yet,
2172 * so of course we can't find the real func/line info,
2173 * but the "break" still works, and the warning is annoying.
2174 * So I commented out the warning. RT */
2175 /* warning ("In stub for %s; unable to find real function/line info",
2176 SYMBOL_LINKAGE_NAME (msymbol)); */
2179 else if (SYMBOL_VALUE_ADDRESS (mfunsym
)
2180 == SYMBOL_VALUE_ADDRESS (msymbol
))
2181 /* Avoid infinite recursion */
2182 /* See above comment about why warning is commented out. */
2183 /* warning ("In stub for %s; unable to find real function/line info",
2184 SYMBOL_LINKAGE_NAME (msymbol)); */
2188 return find_pc_line (SYMBOL_VALUE_ADDRESS (mfunsym
), 0);
2192 s
= find_pc_sect_symtab (pc
, section
);
2195 /* If no symbol information, return previous pc. */
2202 bv
= BLOCKVECTOR (s
);
2203 objfile
= s
->objfile
;
2205 /* Look at all the symtabs that share this blockvector.
2206 They all have the same apriori range, that we found was right;
2207 but they have different line tables. */
2209 ALL_OBJFILE_SYMTABS (objfile
, s
)
2211 if (BLOCKVECTOR (s
) != bv
)
2214 /* Find the best line in this symtab. */
2221 /* I think len can be zero if the symtab lacks line numbers
2222 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
2223 I'm not sure which, and maybe it depends on the symbol
2229 item
= l
->item
; /* Get first line info. */
2231 /* Is this file's first line closer than the first lines of other files?
2232 If so, record this file, and its first line, as best alternate. */
2233 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
2239 for (i
= 0; i
< len
; i
++, item
++)
2241 /* Leave prev pointing to the linetable entry for the last line
2242 that started at or before PC. */
2249 /* At this point, prev points at the line whose start addr is <= pc, and
2250 item points at the next line. If we ran off the end of the linetable
2251 (pc >= start of the last line), then prev == item. If pc < start of
2252 the first line, prev will not be set. */
2254 /* Is this file's best line closer than the best in the other files?
2255 If so, record this file, and its best line, as best so far. Don't
2256 save prev if it represents the end of a function (i.e. line number
2257 0) instead of a real line. */
2259 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
2264 /* Discard BEST_END if it's before the PC of the current BEST. */
2265 if (best_end
<= best
->pc
)
2269 /* If another line (denoted by ITEM) is in the linetable and its
2270 PC is after BEST's PC, but before the current BEST_END, then
2271 use ITEM's PC as the new best_end. */
2272 if (best
&& i
< len
&& item
->pc
> best
->pc
2273 && (best_end
== 0 || best_end
> item
->pc
))
2274 best_end
= item
->pc
;
2279 /* If we didn't find any line number info, just return zeros.
2280 We used to return alt->line - 1 here, but that could be
2281 anywhere; if we don't have line number info for this PC,
2282 don't make some up. */
2285 else if (best
->line
== 0)
2287 /* If our best fit is in a range of PC's for which no line
2288 number info is available (line number is zero) then we didn't
2289 find any valid line information. */
2294 val
.symtab
= best_symtab
;
2295 val
.line
= best
->line
;
2297 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
2302 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
2304 val
.section
= section
;
2308 /* Backward compatibility (no section). */
2310 struct symtab_and_line
2311 find_pc_line (CORE_ADDR pc
, int notcurrent
)
2313 struct obj_section
*section
;
2315 section
= find_pc_overlay (pc
);
2316 if (pc_in_unmapped_range (pc
, section
))
2317 pc
= overlay_mapped_address (pc
, section
);
2318 return find_pc_sect_line (pc
, section
, notcurrent
);
2321 /* Find line number LINE in any symtab whose name is the same as
2324 If found, return the symtab that contains the linetable in which it was
2325 found, set *INDEX to the index in the linetable of the best entry
2326 found, and set *EXACT_MATCH nonzero if the value returned is an
2329 If not found, return NULL. */
2332 find_line_symtab (struct symtab
*symtab
, int line
,
2333 int *index
, int *exact_match
)
2335 int exact
= 0; /* Initialized here to avoid a compiler warning. */
2337 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
2341 struct linetable
*best_linetable
;
2342 struct symtab
*best_symtab
;
2344 /* First try looking it up in the given symtab. */
2345 best_linetable
= LINETABLE (symtab
);
2346 best_symtab
= symtab
;
2347 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
2348 if (best_index
< 0 || !exact
)
2350 /* Didn't find an exact match. So we better keep looking for
2351 another symtab with the same name. In the case of xcoff,
2352 multiple csects for one source file (produced by IBM's FORTRAN
2353 compiler) produce multiple symtabs (this is unavoidable
2354 assuming csects can be at arbitrary places in memory and that
2355 the GLOBAL_BLOCK of a symtab has a begin and end address). */
2357 /* BEST is the smallest linenumber > LINE so far seen,
2358 or 0 if none has been seen so far.
2359 BEST_INDEX and BEST_LINETABLE identify the item for it. */
2362 struct objfile
*objfile
;
2365 if (best_index
>= 0)
2366 best
= best_linetable
->item
[best_index
].line
;
2370 ALL_OBJFILES (objfile
)
2373 objfile
->sf
->qf
->expand_symtabs_with_filename (objfile
,
2377 /* Get symbol full file name if possible. */
2378 symtab_to_fullname (symtab
);
2380 ALL_SYMTABS (objfile
, s
)
2382 struct linetable
*l
;
2385 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
2387 if (symtab
->fullname
!= NULL
2388 && symtab_to_fullname (s
) != NULL
2389 && FILENAME_CMP (symtab
->fullname
, s
->fullname
) != 0)
2392 ind
= find_line_common (l
, line
, &exact
, 0);
2402 if (best
== 0 || l
->item
[ind
].line
< best
)
2404 best
= l
->item
[ind
].line
;
2417 *index
= best_index
;
2419 *exact_match
= exact
;
2424 /* Given SYMTAB, returns all the PCs function in the symtab that
2425 exactly match LINE. Returns NULL if there are no exact matches,
2426 but updates BEST_ITEM in this case. */
2429 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
2430 struct linetable_entry
**best_item
)
2433 struct symbol
*previous_function
= NULL
;
2434 VEC (CORE_ADDR
) *result
= NULL
;
2436 /* First, collect all the PCs that are at this line. */
2442 idx
= find_line_common (LINETABLE (symtab
), line
, &was_exact
, start
);
2448 struct linetable_entry
*item
= &LINETABLE (symtab
)->item
[idx
];
2450 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
2456 VEC_safe_push (CORE_ADDR
, result
, LINETABLE (symtab
)->item
[idx
].pc
);
2464 /* Set the PC value for a given source file and line number and return true.
2465 Returns zero for invalid line number (and sets the PC to 0).
2466 The source file is specified with a struct symtab. */
2469 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
2471 struct linetable
*l
;
2478 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
2481 l
= LINETABLE (symtab
);
2482 *pc
= l
->item
[ind
].pc
;
2489 /* Find the range of pc values in a line.
2490 Store the starting pc of the line into *STARTPTR
2491 and the ending pc (start of next line) into *ENDPTR.
2492 Returns 1 to indicate success.
2493 Returns 0 if could not find the specified line. */
2496 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
2499 CORE_ADDR startaddr
;
2500 struct symtab_and_line found_sal
;
2503 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
2506 /* This whole function is based on address. For example, if line 10 has
2507 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
2508 "info line *0x123" should say the line goes from 0x100 to 0x200
2509 and "info line *0x355" should say the line goes from 0x300 to 0x400.
2510 This also insures that we never give a range like "starts at 0x134
2511 and ends at 0x12c". */
2513 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
2514 if (found_sal
.line
!= sal
.line
)
2516 /* The specified line (sal) has zero bytes. */
2517 *startptr
= found_sal
.pc
;
2518 *endptr
= found_sal
.pc
;
2522 *startptr
= found_sal
.pc
;
2523 *endptr
= found_sal
.end
;
2528 /* Given a line table and a line number, return the index into the line
2529 table for the pc of the nearest line whose number is >= the specified one.
2530 Return -1 if none is found. The value is >= 0 if it is an index.
2531 START is the index at which to start searching the line table.
2533 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
2536 find_line_common (struct linetable
*l
, int lineno
,
2537 int *exact_match
, int start
)
2542 /* BEST is the smallest linenumber > LINENO so far seen,
2543 or 0 if none has been seen so far.
2544 BEST_INDEX identifies the item for it. */
2546 int best_index
= -1;
2557 for (i
= start
; i
< len
; i
++)
2559 struct linetable_entry
*item
= &(l
->item
[i
]);
2561 if (item
->line
== lineno
)
2563 /* Return the first (lowest address) entry which matches. */
2568 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
2575 /* If we got here, we didn't get an exact match. */
2580 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
2582 struct symtab_and_line sal
;
2584 sal
= find_pc_line (pc
, 0);
2587 return sal
.symtab
!= 0;
2590 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
2591 address for that function that has an entry in SYMTAB's line info
2592 table. If such an entry cannot be found, return FUNC_ADDR
2595 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
2597 CORE_ADDR func_start
, func_end
;
2598 struct linetable
*l
;
2601 /* Give up if this symbol has no lineinfo table. */
2602 l
= LINETABLE (symtab
);
2606 /* Get the range for the function's PC values, or give up if we
2607 cannot, for some reason. */
2608 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
2611 /* Linetable entries are ordered by PC values, see the commentary in
2612 symtab.h where `struct linetable' is defined. Thus, the first
2613 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
2614 address we are looking for. */
2615 for (i
= 0; i
< l
->nitems
; i
++)
2617 struct linetable_entry
*item
= &(l
->item
[i
]);
2619 /* Don't use line numbers of zero, they mark special entries in
2620 the table. See the commentary on symtab.h before the
2621 definition of struct linetable. */
2622 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
2629 /* Given a function symbol SYM, find the symtab and line for the start
2631 If the argument FUNFIRSTLINE is nonzero, we want the first line
2632 of real code inside the function. */
2634 struct symtab_and_line
2635 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
2637 struct symtab_and_line sal
;
2639 fixup_symbol_section (sym
, NULL
);
2640 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
2641 SYMBOL_OBJ_SECTION (sym
), 0);
2643 /* We always should have a line for the function start address.
2644 If we don't, something is odd. Create a plain SAL refering
2645 just the PC and hope that skip_prologue_sal (if requested)
2646 can find a line number for after the prologue. */
2647 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
2650 sal
.pspace
= current_program_space
;
2651 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2652 sal
.section
= SYMBOL_OBJ_SECTION (sym
);
2656 skip_prologue_sal (&sal
);
2661 /* Adjust SAL to the first instruction past the function prologue.
2662 If the PC was explicitly specified, the SAL is not changed.
2663 If the line number was explicitly specified, at most the SAL's PC
2664 is updated. If SAL is already past the prologue, then do nothing. */
2666 skip_prologue_sal (struct symtab_and_line
*sal
)
2669 struct symtab_and_line start_sal
;
2670 struct cleanup
*old_chain
;
2671 CORE_ADDR pc
, saved_pc
;
2672 struct obj_section
*section
;
2674 struct objfile
*objfile
;
2675 struct gdbarch
*gdbarch
;
2676 struct block
*b
, *function_block
;
2677 int force_skip
, skip
;
2679 /* Do not change the SAL is PC was specified explicitly. */
2680 if (sal
->explicit_pc
)
2683 old_chain
= save_current_space_and_thread ();
2684 switch_to_program_space_and_thread (sal
->pspace
);
2686 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
2689 fixup_symbol_section (sym
, NULL
);
2691 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
2692 section
= SYMBOL_OBJ_SECTION (sym
);
2693 name
= SYMBOL_LINKAGE_NAME (sym
);
2694 objfile
= SYMBOL_SYMTAB (sym
)->objfile
;
2698 struct minimal_symbol
*msymbol
2699 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
2701 if (msymbol
== NULL
)
2703 do_cleanups (old_chain
);
2707 pc
= SYMBOL_VALUE_ADDRESS (msymbol
);
2708 section
= SYMBOL_OBJ_SECTION (msymbol
);
2709 name
= SYMBOL_LINKAGE_NAME (msymbol
);
2710 objfile
= msymbol_objfile (msymbol
);
2713 gdbarch
= get_objfile_arch (objfile
);
2715 /* Process the prologue in two passes. In the first pass try to skip the
2716 prologue (SKIP is true) and verify there is a real need for it (indicated
2717 by FORCE_SKIP). If no such reason was found run a second pass where the
2718 prologue is not skipped (SKIP is false). */
2723 /* Be conservative - allow direct PC (without skipping prologue) only if we
2724 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
2725 have to be set by the caller so we use SYM instead. */
2726 if (sym
&& SYMBOL_SYMTAB (sym
)->locations_valid
)
2734 /* If the function is in an unmapped overlay, use its unmapped LMA address,
2735 so that gdbarch_skip_prologue has something unique to work on. */
2736 if (section_is_overlay (section
) && !section_is_mapped (section
))
2737 pc
= overlay_unmapped_address (pc
, section
);
2739 /* Skip "first line" of function (which is actually its prologue). */
2740 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
2742 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
2744 /* For overlays, map pc back into its mapped VMA range. */
2745 pc
= overlay_mapped_address (pc
, section
);
2747 /* Calculate line number. */
2748 start_sal
= find_pc_sect_line (pc
, section
, 0);
2750 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
2751 line is still part of the same function. */
2752 if (skip
&& start_sal
.pc
!= pc
2753 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
2754 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
2755 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
)
2756 == lookup_minimal_symbol_by_pc_section (pc
, section
))))
2758 /* First pc of next line */
2760 /* Recalculate the line number (might not be N+1). */
2761 start_sal
= find_pc_sect_line (pc
, section
, 0);
2764 /* On targets with executable formats that don't have a concept of
2765 constructors (ELF with .init has, PE doesn't), gcc emits a call
2766 to `__main' in `main' between the prologue and before user
2768 if (gdbarch_skip_main_prologue_p (gdbarch
)
2769 && name
&& strcmp (name
, "main") == 0)
2771 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
2772 /* Recalculate the line number (might not be N+1). */
2773 start_sal
= find_pc_sect_line (pc
, section
, 0);
2777 while (!force_skip
&& skip
--);
2779 /* If we still don't have a valid source line, try to find the first
2780 PC in the lineinfo table that belongs to the same function. This
2781 happens with COFF debug info, which does not seem to have an
2782 entry in lineinfo table for the code after the prologue which has
2783 no direct relation to source. For example, this was found to be
2784 the case with the DJGPP target using "gcc -gcoff" when the
2785 compiler inserted code after the prologue to make sure the stack
2787 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
2789 pc
= skip_prologue_using_lineinfo (pc
, SYMBOL_SYMTAB (sym
));
2790 /* Recalculate the line number. */
2791 start_sal
= find_pc_sect_line (pc
, section
, 0);
2794 do_cleanups (old_chain
);
2796 /* If we're already past the prologue, leave SAL unchanged. Otherwise
2797 forward SAL to the end of the prologue. */
2802 sal
->section
= section
;
2804 /* Unless the explicit_line flag was set, update the SAL line
2805 and symtab to correspond to the modified PC location. */
2806 if (sal
->explicit_line
)
2809 sal
->symtab
= start_sal
.symtab
;
2810 sal
->line
= start_sal
.line
;
2811 sal
->end
= start_sal
.end
;
2813 /* Check if we are now inside an inlined function. If we can,
2814 use the call site of the function instead. */
2815 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
2816 function_block
= NULL
;
2819 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
2821 else if (BLOCK_FUNCTION (b
) != NULL
)
2823 b
= BLOCK_SUPERBLOCK (b
);
2825 if (function_block
!= NULL
2826 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
2828 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
2829 sal
->symtab
= SYMBOL_SYMTAB (BLOCK_FUNCTION (function_block
));
2833 /* If P is of the form "operator[ \t]+..." where `...' is
2834 some legitimate operator text, return a pointer to the
2835 beginning of the substring of the operator text.
2836 Otherwise, return "". */
2838 operator_chars (char *p
, char **end
)
2841 if (strncmp (p
, "operator", 8))
2845 /* Don't get faked out by `operator' being part of a longer
2847 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
2850 /* Allow some whitespace between `operator' and the operator symbol. */
2851 while (*p
== ' ' || *p
== '\t')
2854 /* Recognize 'operator TYPENAME'. */
2856 if (isalpha (*p
) || *p
== '_' || *p
== '$')
2860 while (isalnum (*q
) || *q
== '_' || *q
== '$')
2869 case '\\': /* regexp quoting */
2872 if (p
[2] == '=') /* 'operator\*=' */
2874 else /* 'operator\*' */
2878 else if (p
[1] == '[')
2881 error (_("mismatched quoting on brackets, "
2882 "try 'operator\\[\\]'"));
2883 else if (p
[2] == '\\' && p
[3] == ']')
2885 *end
= p
+ 4; /* 'operator\[\]' */
2889 error (_("nothing is allowed between '[' and ']'"));
2893 /* Gratuitous qoute: skip it and move on. */
2915 if (p
[0] == '-' && p
[1] == '>')
2917 /* Struct pointer member operator 'operator->'. */
2920 *end
= p
+ 3; /* 'operator->*' */
2923 else if (p
[2] == '\\')
2925 *end
= p
+ 4; /* Hopefully 'operator->\*' */
2930 *end
= p
+ 2; /* 'operator->' */
2934 if (p
[1] == '=' || p
[1] == p
[0])
2945 error (_("`operator ()' must be specified "
2946 "without whitespace in `()'"));
2951 error (_("`operator ?:' must be specified "
2952 "without whitespace in `?:'"));
2957 error (_("`operator []' must be specified "
2958 "without whitespace in `[]'"));
2962 error (_("`operator %s' not supported"), p
);
2971 /* If FILE is not already in the table of files, return zero;
2972 otherwise return non-zero. Optionally add FILE to the table if ADD
2973 is non-zero. If *FIRST is non-zero, forget the old table
2976 filename_seen (const char *file
, int add
, int *first
)
2978 /* Table of files seen so far. */
2979 static const char **tab
= NULL
;
2980 /* Allocated size of tab in elements.
2981 Start with one 256-byte block (when using GNU malloc.c).
2982 24 is the malloc overhead when range checking is in effect. */
2983 static int tab_alloc_size
= (256 - 24) / sizeof (char *);
2984 /* Current size of tab in elements. */
2985 static int tab_cur_size
;
2991 tab
= (const char **) xmalloc (tab_alloc_size
* sizeof (*tab
));
2995 /* Is FILE in tab? */
2996 for (p
= tab
; p
< tab
+ tab_cur_size
; p
++)
2997 if (filename_cmp (*p
, file
) == 0)
3000 /* No; maybe add it to tab. */
3003 if (tab_cur_size
== tab_alloc_size
)
3005 tab_alloc_size
*= 2;
3006 tab
= (const char **) xrealloc ((char *) tab
,
3007 tab_alloc_size
* sizeof (*tab
));
3009 tab
[tab_cur_size
++] = file
;
3015 /* Slave routine for sources_info. Force line breaks at ,'s.
3016 NAME is the name to print and *FIRST is nonzero if this is the first
3017 name printed. Set *FIRST to zero. */
3019 output_source_filename (const char *name
, int *first
)
3021 /* Since a single source file can result in several partial symbol
3022 tables, we need to avoid printing it more than once. Note: if
3023 some of the psymtabs are read in and some are not, it gets
3024 printed both under "Source files for which symbols have been
3025 read" and "Source files for which symbols will be read in on
3026 demand". I consider this a reasonable way to deal with the
3027 situation. I'm not sure whether this can also happen for
3028 symtabs; it doesn't hurt to check. */
3030 /* Was NAME already seen? */
3031 if (filename_seen (name
, 1, first
))
3033 /* Yes; don't print it again. */
3036 /* No; print it and reset *FIRST. */
3043 printf_filtered (", ");
3047 fputs_filtered (name
, gdb_stdout
);
3050 /* A callback for map_partial_symbol_filenames. */
3052 output_partial_symbol_filename (const char *filename
, const char *fullname
,
3055 output_source_filename (fullname
? fullname
: filename
, data
);
3059 sources_info (char *ignore
, int from_tty
)
3062 struct objfile
*objfile
;
3065 if (!have_full_symbols () && !have_partial_symbols ())
3067 error (_("No symbol table is loaded. Use the \"file\" command."));
3070 printf_filtered ("Source files for which symbols have been read in:\n\n");
3073 ALL_SYMTABS (objfile
, s
)
3075 const char *fullname
= symtab_to_fullname (s
);
3077 output_source_filename (fullname
? fullname
: s
->filename
, &first
);
3079 printf_filtered ("\n\n");
3081 printf_filtered ("Source files for which symbols "
3082 "will be read in on demand:\n\n");
3085 map_partial_symbol_filenames (output_partial_symbol_filename
, &first
,
3086 1 /*need_fullname*/);
3087 printf_filtered ("\n");
3091 file_matches (const char *file
, char *files
[], int nfiles
)
3095 if (file
!= NULL
&& nfiles
!= 0)
3097 for (i
= 0; i
< nfiles
; i
++)
3099 if (filename_cmp (files
[i
], lbasename (file
)) == 0)
3103 else if (nfiles
== 0)
3108 /* Free any memory associated with a search. */
3110 free_search_symbols (struct symbol_search
*symbols
)
3112 struct symbol_search
*p
;
3113 struct symbol_search
*next
;
3115 for (p
= symbols
; p
!= NULL
; p
= next
)
3123 do_free_search_symbols_cleanup (void *symbols
)
3125 free_search_symbols (symbols
);
3129 make_cleanup_free_search_symbols (struct symbol_search
*symbols
)
3131 return make_cleanup (do_free_search_symbols_cleanup
, symbols
);
3134 /* Helper function for sort_search_symbols and qsort. Can only
3135 sort symbols, not minimal symbols. */
3137 compare_search_syms (const void *sa
, const void *sb
)
3139 struct symbol_search
**sym_a
= (struct symbol_search
**) sa
;
3140 struct symbol_search
**sym_b
= (struct symbol_search
**) sb
;
3142 return strcmp (SYMBOL_PRINT_NAME ((*sym_a
)->symbol
),
3143 SYMBOL_PRINT_NAME ((*sym_b
)->symbol
));
3146 /* Sort the ``nfound'' symbols in the list after prevtail. Leave
3147 prevtail where it is, but update its next pointer to point to
3148 the first of the sorted symbols. */
3149 static struct symbol_search
*
3150 sort_search_symbols (struct symbol_search
*prevtail
, int nfound
)
3152 struct symbol_search
**symbols
, *symp
, *old_next
;
3155 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
3157 symp
= prevtail
->next
;
3158 for (i
= 0; i
< nfound
; i
++)
3163 /* Generally NULL. */
3166 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
3167 compare_search_syms
);
3170 for (i
= 0; i
< nfound
; i
++)
3172 symp
->next
= symbols
[i
];
3175 symp
->next
= old_next
;
3181 /* An object of this type is passed as the user_data to the
3182 expand_symtabs_matching method. */
3183 struct search_symbols_data
3188 /* It is true if PREG contains valid data, false otherwise. */
3189 unsigned preg_p
: 1;
3193 /* A callback for expand_symtabs_matching. */
3195 search_symbols_file_matches (const char *filename
, void *user_data
)
3197 struct search_symbols_data
*data
= user_data
;
3199 return file_matches (filename
, data
->files
, data
->nfiles
);
3202 /* A callback for expand_symtabs_matching. */
3204 search_symbols_name_matches (const struct language_defn
*language
,
3205 const char *symname
, void *user_data
)
3207 struct search_symbols_data
*data
= user_data
;
3209 return !data
->preg_p
|| regexec (&data
->preg
, symname
, 0, NULL
, 0) == 0;
3212 /* Search the symbol table for matches to the regular expression REGEXP,
3213 returning the results in *MATCHES.
3215 Only symbols of KIND are searched:
3216 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
3217 and constants (enums)
3218 FUNCTIONS_DOMAIN - search all functions
3219 TYPES_DOMAIN - search all type names
3220 ALL_DOMAIN - an internal error for this function
3222 free_search_symbols should be called when *MATCHES is no longer needed.
3224 The results are sorted locally; each symtab's global and static blocks are
3225 separately alphabetized. */
3228 search_symbols (char *regexp
, enum search_domain kind
,
3229 int nfiles
, char *files
[],
3230 struct symbol_search
**matches
)
3233 struct blockvector
*bv
;
3236 struct dict_iterator iter
;
3238 struct objfile
*objfile
;
3239 struct minimal_symbol
*msymbol
;
3242 static const enum minimal_symbol_type types
[]
3243 = {mst_data
, mst_text
, mst_abs
};
3244 static const enum minimal_symbol_type types2
[]
3245 = {mst_bss
, mst_file_text
, mst_abs
};
3246 static const enum minimal_symbol_type types3
[]
3247 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
3248 static const enum minimal_symbol_type types4
[]
3249 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
3250 enum minimal_symbol_type ourtype
;
3251 enum minimal_symbol_type ourtype2
;
3252 enum minimal_symbol_type ourtype3
;
3253 enum minimal_symbol_type ourtype4
;
3254 struct symbol_search
*sr
;
3255 struct symbol_search
*psr
;
3256 struct symbol_search
*tail
;
3257 struct search_symbols_data datum
;
3259 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
3260 CLEANUP_CHAIN is freed only in the case of an error. */
3261 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
3262 struct cleanup
*retval_chain
;
3264 gdb_assert (kind
<= TYPES_DOMAIN
);
3266 ourtype
= types
[kind
];
3267 ourtype2
= types2
[kind
];
3268 ourtype3
= types3
[kind
];
3269 ourtype4
= types4
[kind
];
3271 sr
= *matches
= NULL
;
3277 /* Make sure spacing is right for C++ operators.
3278 This is just a courtesy to make the matching less sensitive
3279 to how many spaces the user leaves between 'operator'
3280 and <TYPENAME> or <OPERATOR>. */
3282 char *opname
= operator_chars (regexp
, &opend
);
3287 int fix
= -1; /* -1 means ok; otherwise number of
3290 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
3292 /* There should 1 space between 'operator' and 'TYPENAME'. */
3293 if (opname
[-1] != ' ' || opname
[-2] == ' ')
3298 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
3299 if (opname
[-1] == ' ')
3302 /* If wrong number of spaces, fix it. */
3305 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
3307 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
3312 errcode
= regcomp (&datum
.preg
, regexp
,
3313 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
3317 char *err
= get_regcomp_error (errcode
, &datum
.preg
);
3319 make_cleanup (xfree
, err
);
3320 error (_("Invalid regexp (%s): %s"), err
, regexp
);
3323 make_regfree_cleanup (&datum
.preg
);
3326 /* Search through the partial symtabs *first* for all symbols
3327 matching the regexp. That way we don't have to reproduce all of
3328 the machinery below. */
3330 datum
.nfiles
= nfiles
;
3331 datum
.files
= files
;
3332 ALL_OBJFILES (objfile
)
3335 objfile
->sf
->qf
->expand_symtabs_matching (objfile
,
3336 search_symbols_file_matches
,
3337 search_symbols_name_matches
,
3342 retval_chain
= old_chain
;
3344 /* Here, we search through the minimal symbol tables for functions
3345 and variables that match, and force their symbols to be read.
3346 This is in particular necessary for demangled variable names,
3347 which are no longer put into the partial symbol tables.
3348 The symbol will then be found during the scan of symtabs below.
3350 For functions, find_pc_symtab should succeed if we have debug info
3351 for the function, for variables we have to call lookup_symbol
3352 to determine if the variable has debug info.
3353 If the lookup fails, set found_misc so that we will rescan to print
3354 any matching symbols without debug info. */
3356 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
3358 ALL_MSYMBOLS (objfile
, msymbol
)
3362 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3363 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3364 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3365 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3368 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3371 if (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
)))
3373 /* FIXME: carlton/2003-02-04: Given that the
3374 semantics of lookup_symbol keeps on changing
3375 slightly, it would be a nice idea if we had a
3376 function lookup_symbol_minsym that found the
3377 symbol associated to a given minimal symbol (if
3379 if (kind
== FUNCTIONS_DOMAIN
3380 || lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3381 (struct block
*) NULL
,
3391 ALL_PRIMARY_SYMTABS (objfile
, s
)
3393 bv
= BLOCKVECTOR (s
);
3394 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
3396 struct symbol_search
*prevtail
= tail
;
3399 b
= BLOCKVECTOR_BLOCK (bv
, i
);
3400 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
3402 struct symtab
*real_symtab
= SYMBOL_SYMTAB (sym
);
3406 if (file_matches (real_symtab
->filename
, files
, nfiles
)
3408 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (sym
), 0,
3410 && ((kind
== VARIABLES_DOMAIN
3411 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
3412 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
3413 && SYMBOL_CLASS (sym
) != LOC_BLOCK
3414 /* LOC_CONST can be used for more than just enums,
3415 e.g., c++ static const members.
3416 We only want to skip enums here. */
3417 && !(SYMBOL_CLASS (sym
) == LOC_CONST
3418 && TYPE_CODE (SYMBOL_TYPE (sym
))
3420 || (kind
== FUNCTIONS_DOMAIN
3421 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
3422 || (kind
== TYPES_DOMAIN
3423 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
3426 psr
= (struct symbol_search
*)
3427 xmalloc (sizeof (struct symbol_search
));
3429 psr
->symtab
= real_symtab
;
3431 psr
->msymbol
= NULL
;
3443 if (prevtail
== NULL
)
3445 struct symbol_search dummy
;
3448 tail
= sort_search_symbols (&dummy
, nfound
);
3451 make_cleanup_free_search_symbols (sr
);
3454 tail
= sort_search_symbols (prevtail
, nfound
);
3459 /* If there are no eyes, avoid all contact. I mean, if there are
3460 no debug symbols, then print directly from the msymbol_vector. */
3462 if (found_misc
|| kind
!= FUNCTIONS_DOMAIN
)
3464 ALL_MSYMBOLS (objfile
, msymbol
)
3468 if (MSYMBOL_TYPE (msymbol
) == ourtype
||
3469 MSYMBOL_TYPE (msymbol
) == ourtype2
||
3470 MSYMBOL_TYPE (msymbol
) == ourtype3
||
3471 MSYMBOL_TYPE (msymbol
) == ourtype4
)
3474 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (msymbol
), 0,
3477 /* Functions: Look up by address. */
3478 if (kind
!= FUNCTIONS_DOMAIN
||
3479 (0 == find_pc_symtab (SYMBOL_VALUE_ADDRESS (msymbol
))))
3481 /* Variables/Absolutes: Look up by name. */
3482 if (lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol
),
3483 (struct block
*) NULL
, VAR_DOMAIN
, 0)
3487 psr
= (struct symbol_search
*)
3488 xmalloc (sizeof (struct symbol_search
));
3490 psr
->msymbol
= msymbol
;
3497 make_cleanup_free_search_symbols (sr
);
3509 discard_cleanups (retval_chain
);
3510 do_cleanups (old_chain
);
3514 /* Helper function for symtab_symbol_info, this function uses
3515 the data returned from search_symbols() to print information
3516 regarding the match to gdb_stdout. */
3519 print_symbol_info (enum search_domain kind
,
3520 struct symtab
*s
, struct symbol
*sym
,
3521 int block
, char *last
)
3523 if (last
== NULL
|| filename_cmp (last
, s
->filename
) != 0)
3525 fputs_filtered ("\nFile ", gdb_stdout
);
3526 fputs_filtered (s
->filename
, gdb_stdout
);
3527 fputs_filtered (":\n", gdb_stdout
);
3530 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
3531 printf_filtered ("static ");
3533 /* Typedef that is not a C++ class. */
3534 if (kind
== TYPES_DOMAIN
3535 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
3536 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
3537 /* variable, func, or typedef-that-is-c++-class. */
3538 else if (kind
< TYPES_DOMAIN
||
3539 (kind
== TYPES_DOMAIN
&&
3540 SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
3542 type_print (SYMBOL_TYPE (sym
),
3543 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
3544 ? "" : SYMBOL_PRINT_NAME (sym
)),
3547 printf_filtered (";\n");
3551 /* This help function for symtab_symbol_info() prints information
3552 for non-debugging symbols to gdb_stdout. */
3555 print_msymbol_info (struct minimal_symbol
*msymbol
)
3557 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol_objfile (msymbol
));
3560 if (gdbarch_addr_bit (gdbarch
) <= 32)
3561 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
)
3562 & (CORE_ADDR
) 0xffffffff,
3565 tmp
= hex_string_custom (SYMBOL_VALUE_ADDRESS (msymbol
),
3567 printf_filtered ("%s %s\n",
3568 tmp
, SYMBOL_PRINT_NAME (msymbol
));
3571 /* This is the guts of the commands "info functions", "info types", and
3572 "info variables". It calls search_symbols to find all matches and then
3573 print_[m]symbol_info to print out some useful information about the
3577 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
3579 static const char * const classnames
[] =
3580 {"variable", "function", "type"};
3581 struct symbol_search
*symbols
;
3582 struct symbol_search
*p
;
3583 struct cleanup
*old_chain
;
3584 char *last_filename
= NULL
;
3587 gdb_assert (kind
<= TYPES_DOMAIN
);
3589 /* Must make sure that if we're interrupted, symbols gets freed. */
3590 search_symbols (regexp
, kind
, 0, (char **) NULL
, &symbols
);
3591 old_chain
= make_cleanup_free_search_symbols (symbols
);
3593 printf_filtered (regexp
3594 ? "All %ss matching regular expression \"%s\":\n"
3595 : "All defined %ss:\n",
3596 classnames
[kind
], regexp
);
3598 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
3602 if (p
->msymbol
!= NULL
)
3606 printf_filtered ("\nNon-debugging symbols:\n");
3609 print_msymbol_info (p
->msymbol
);
3613 print_symbol_info (kind
,
3618 last_filename
= p
->symtab
->filename
;
3622 do_cleanups (old_chain
);
3626 variables_info (char *regexp
, int from_tty
)
3628 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
3632 functions_info (char *regexp
, int from_tty
)
3634 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
3639 types_info (char *regexp
, int from_tty
)
3641 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
3644 /* Breakpoint all functions matching regular expression. */
3647 rbreak_command_wrapper (char *regexp
, int from_tty
)
3649 rbreak_command (regexp
, from_tty
);
3652 /* A cleanup function that calls end_rbreak_breakpoints. */
3655 do_end_rbreak_breakpoints (void *ignore
)
3657 end_rbreak_breakpoints ();
3661 rbreak_command (char *regexp
, int from_tty
)
3663 struct symbol_search
*ss
;
3664 struct symbol_search
*p
;
3665 struct cleanup
*old_chain
;
3666 char *string
= NULL
;
3668 char **files
= NULL
, *file_name
;
3673 char *colon
= strchr (regexp
, ':');
3675 if (colon
&& *(colon
+ 1) != ':')
3679 colon_index
= colon
- regexp
;
3680 file_name
= alloca (colon_index
+ 1);
3681 memcpy (file_name
, regexp
, colon_index
);
3682 file_name
[colon_index
--] = 0;
3683 while (isspace (file_name
[colon_index
]))
3684 file_name
[colon_index
--] = 0;
3688 while (isspace (*regexp
)) regexp
++;
3692 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
3693 old_chain
= make_cleanup_free_search_symbols (ss
);
3694 make_cleanup (free_current_contents
, &string
);
3696 start_rbreak_breakpoints ();
3697 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
3698 for (p
= ss
; p
!= NULL
; p
= p
->next
)
3700 if (p
->msymbol
== NULL
)
3702 int newlen
= (strlen (p
->symtab
->filename
)
3703 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
3708 string
= xrealloc (string
, newlen
);
3711 strcpy (string
, p
->symtab
->filename
);
3712 strcat (string
, ":'");
3713 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
3714 strcat (string
, "'");
3715 break_command (string
, from_tty
);
3716 print_symbol_info (FUNCTIONS_DOMAIN
,
3720 p
->symtab
->filename
);
3724 int newlen
= (strlen (SYMBOL_LINKAGE_NAME (p
->msymbol
)) + 3);
3728 string
= xrealloc (string
, newlen
);
3731 strcpy (string
, "'");
3732 strcat (string
, SYMBOL_LINKAGE_NAME (p
->msymbol
));
3733 strcat (string
, "'");
3735 break_command (string
, from_tty
);
3736 printf_filtered ("<function, no debug info> %s;\n",
3737 SYMBOL_PRINT_NAME (p
->msymbol
));
3741 do_cleanups (old_chain
);
3745 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
3747 Either sym_text[sym_text_len] != '(' and then we search for any
3748 symbol starting with SYM_TEXT text.
3750 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
3751 be terminated at that point. Partial symbol tables do not have parameters
3755 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
3757 int (*ncmp
) (const char *, const char *, size_t);
3759 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
3761 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
3764 if (sym_text
[sym_text_len
] == '(')
3766 /* User searches for `name(someth...'. Require NAME to be terminated.
3767 Normally psymtabs and gdbindex have no parameter types so '\0' will be
3768 present but accept even parameters presence. In this case this
3769 function is in fact strcmp_iw but whitespace skipping is not supported
3770 for tab completion. */
3772 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
3779 /* Free any memory associated with a completion list. */
3782 free_completion_list (char ***list_ptr
)
3785 char **list
= *list_ptr
;
3787 while (list
[i
] != NULL
)
3795 /* Callback for make_cleanup. */
3798 do_free_completion_list (void *list
)
3800 free_completion_list (list
);
3803 /* Helper routine for make_symbol_completion_list. */
3805 static int return_val_size
;
3806 static int return_val_index
;
3807 static char **return_val
;
3809 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
3810 completion_list_add_name \
3811 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
3813 /* Test to see if the symbol specified by SYMNAME (which is already
3814 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
3815 characters. If so, add it to the current completion list. */
3818 completion_list_add_name (char *symname
, char *sym_text
, int sym_text_len
,
3819 char *text
, char *word
)
3823 /* Clip symbols that cannot match. */
3824 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
3827 /* We have a match for a completion, so add SYMNAME to the current list
3828 of matches. Note that the name is moved to freshly malloc'd space. */
3833 if (word
== sym_text
)
3835 new = xmalloc (strlen (symname
) + 5);
3836 strcpy (new, symname
);
3838 else if (word
> sym_text
)
3840 /* Return some portion of symname. */
3841 new = xmalloc (strlen (symname
) + 5);
3842 strcpy (new, symname
+ (word
- sym_text
));
3846 /* Return some of SYM_TEXT plus symname. */
3847 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
3848 strncpy (new, word
, sym_text
- word
);
3849 new[sym_text
- word
] = '\0';
3850 strcat (new, symname
);
3853 if (return_val_index
+ 3 > return_val_size
)
3855 newsize
= (return_val_size
*= 2) * sizeof (char *);
3856 return_val
= (char **) xrealloc ((char *) return_val
, newsize
);
3858 return_val
[return_val_index
++] = new;
3859 return_val
[return_val_index
] = NULL
;
3863 /* ObjC: In case we are completing on a selector, look as the msymbol
3864 again and feed all the selectors into the mill. */
3867 completion_list_objc_symbol (struct minimal_symbol
*msymbol
, char *sym_text
,
3868 int sym_text_len
, char *text
, char *word
)
3870 static char *tmp
= NULL
;
3871 static unsigned int tmplen
= 0;
3873 char *method
, *category
, *selector
;
3876 method
= SYMBOL_NATURAL_NAME (msymbol
);
3878 /* Is it a method? */
3879 if ((method
[0] != '-') && (method
[0] != '+'))
3882 if (sym_text
[0] == '[')
3883 /* Complete on shortened method method. */
3884 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
3886 while ((strlen (method
) + 1) >= tmplen
)
3892 tmp
= xrealloc (tmp
, tmplen
);
3894 selector
= strchr (method
, ' ');
3895 if (selector
!= NULL
)
3898 category
= strchr (method
, '(');
3900 if ((category
!= NULL
) && (selector
!= NULL
))
3902 memcpy (tmp
, method
, (category
- method
));
3903 tmp
[category
- method
] = ' ';
3904 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
3905 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3906 if (sym_text
[0] == '[')
3907 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
3910 if (selector
!= NULL
)
3912 /* Complete on selector only. */
3913 strcpy (tmp
, selector
);
3914 tmp2
= strchr (tmp
, ']');
3918 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
3922 /* Break the non-quoted text based on the characters which are in
3923 symbols. FIXME: This should probably be language-specific. */
3926 language_search_unquoted_string (char *text
, char *p
)
3928 for (; p
> text
; --p
)
3930 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
3934 if ((current_language
->la_language
== language_objc
))
3936 if (p
[-1] == ':') /* Might be part of a method name. */
3938 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
3939 p
-= 2; /* Beginning of a method name. */
3940 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
3941 { /* Might be part of a method name. */
3944 /* Seeing a ' ' or a '(' is not conclusive evidence
3945 that we are in the middle of a method name. However,
3946 finding "-[" or "+[" should be pretty un-ambiguous.
3947 Unfortunately we have to find it now to decide. */
3950 if (isalnum (t
[-1]) || t
[-1] == '_' ||
3951 t
[-1] == ' ' || t
[-1] == ':' ||
3952 t
[-1] == '(' || t
[-1] == ')')
3957 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
3958 p
= t
- 2; /* Method name detected. */
3959 /* Else we leave with p unchanged. */
3969 completion_list_add_fields (struct symbol
*sym
, char *sym_text
,
3970 int sym_text_len
, char *text
, char *word
)
3972 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
3974 struct type
*t
= SYMBOL_TYPE (sym
);
3975 enum type_code c
= TYPE_CODE (t
);
3978 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
3979 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
3980 if (TYPE_FIELD_NAME (t
, j
))
3981 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
3982 sym_text
, sym_text_len
, text
, word
);
3986 /* Type of the user_data argument passed to add_macro_name or
3987 expand_partial_symbol_name. The contents are simply whatever is
3988 needed by completion_list_add_name. */
3989 struct add_name_data
3997 /* A callback used with macro_for_each and macro_for_each_in_scope.
3998 This adds a macro's name to the current completion list. */
4000 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
4001 struct macro_source_file
*ignore2
, int ignore3
,
4004 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4006 completion_list_add_name ((char *) name
,
4007 datum
->sym_text
, datum
->sym_text_len
,
4008 datum
->text
, datum
->word
);
4011 /* A callback for expand_partial_symbol_names. */
4013 expand_partial_symbol_name (const struct language_defn
*language
,
4014 const char *name
, void *user_data
)
4016 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
4018 return compare_symbol_name (name
, datum
->sym_text
, datum
->sym_text_len
);
4022 default_make_symbol_completion_list_break_on (char *text
, char *word
,
4023 const char *break_on
)
4025 /* Problem: All of the symbols have to be copied because readline
4026 frees them. I'm not going to worry about this; hopefully there
4027 won't be that many. */
4031 struct minimal_symbol
*msymbol
;
4032 struct objfile
*objfile
;
4034 const struct block
*surrounding_static_block
, *surrounding_global_block
;
4035 struct dict_iterator iter
;
4036 /* The symbol we are completing on. Points in same buffer as text. */
4038 /* Length of sym_text. */
4040 struct add_name_data datum
;
4041 struct cleanup
*back_to
;
4043 /* Now look for the symbol we are supposed to complete on. */
4047 char *quote_pos
= NULL
;
4049 /* First see if this is a quoted string. */
4051 for (p
= text
; *p
!= '\0'; ++p
)
4053 if (quote_found
!= '\0')
4055 if (*p
== quote_found
)
4056 /* Found close quote. */
4058 else if (*p
== '\\' && p
[1] == quote_found
)
4059 /* A backslash followed by the quote character
4060 doesn't end the string. */
4063 else if (*p
== '\'' || *p
== '"')
4069 if (quote_found
== '\'')
4070 /* A string within single quotes can be a symbol, so complete on it. */
4071 sym_text
= quote_pos
+ 1;
4072 else if (quote_found
== '"')
4073 /* A double-quoted string is never a symbol, nor does it make sense
4074 to complete it any other way. */
4076 return_val
= (char **) xmalloc (sizeof (char *));
4077 return_val
[0] = NULL
;
4082 /* It is not a quoted string. Break it based on the characters
4083 which are in symbols. */
4086 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
4087 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
4096 sym_text_len
= strlen (sym_text
);
4098 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
4100 if (current_language
->la_language
== language_cplus
4101 || current_language
->la_language
== language_java
4102 || current_language
->la_language
== language_fortran
)
4104 /* These languages may have parameters entered by user but they are never
4105 present in the partial symbol tables. */
4107 const char *cs
= memchr (sym_text
, '(', sym_text_len
);
4110 sym_text_len
= cs
- sym_text
;
4112 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
4114 return_val_size
= 100;
4115 return_val_index
= 0;
4116 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
4117 return_val
[0] = NULL
;
4118 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
4120 datum
.sym_text
= sym_text
;
4121 datum
.sym_text_len
= sym_text_len
;
4125 /* Look through the partial symtabs for all symbols which begin
4126 by matching SYM_TEXT. Expand all CUs that you find to the list.
4127 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
4128 expand_partial_symbol_names (expand_partial_symbol_name
, &datum
);
4130 /* At this point scan through the misc symbol vectors and add each
4131 symbol you find to the list. Eventually we want to ignore
4132 anything that isn't a text symbol (everything else will be
4133 handled by the psymtab code above). */
4135 ALL_MSYMBOLS (objfile
, msymbol
)
4138 COMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
, word
);
4140 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
, word
);
4143 /* Search upwards from currently selected frame (so that we can
4144 complete on local vars). Also catch fields of types defined in
4145 this places which match our text string. Only complete on types
4146 visible from current context. */
4148 b
= get_selected_block (0);
4149 surrounding_static_block
= block_static_block (b
);
4150 surrounding_global_block
= block_global_block (b
);
4151 if (surrounding_static_block
!= NULL
)
4152 while (b
!= surrounding_static_block
)
4156 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4158 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
4160 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
4164 /* Stop when we encounter an enclosing function. Do not stop for
4165 non-inlined functions - the locals of the enclosing function
4166 are in scope for a nested function. */
4167 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
4169 b
= BLOCK_SUPERBLOCK (b
);
4172 /* Add fields from the file's types; symbols will be added below. */
4174 if (surrounding_static_block
!= NULL
)
4175 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
4176 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4178 if (surrounding_global_block
!= NULL
)
4179 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
4180 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
4182 /* Go through the symtabs and check the externs and statics for
4183 symbols which match. */
4185 ALL_PRIMARY_SYMTABS (objfile
, s
)
4188 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4189 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4191 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4195 ALL_PRIMARY_SYMTABS (objfile
, s
)
4198 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4199 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4201 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4205 if (current_language
->la_macro_expansion
== macro_expansion_c
)
4207 struct macro_scope
*scope
;
4209 /* Add any macros visible in the default scope. Note that this
4210 may yield the occasional wrong result, because an expression
4211 might be evaluated in a scope other than the default. For
4212 example, if the user types "break file:line if <TAB>", the
4213 resulting expression will be evaluated at "file:line" -- but
4214 at there does not seem to be a way to detect this at
4216 scope
= default_macro_scope ();
4219 macro_for_each_in_scope (scope
->file
, scope
->line
,
4220 add_macro_name
, &datum
);
4224 /* User-defined macros are always visible. */
4225 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
4228 discard_cleanups (back_to
);
4229 return (return_val
);
4233 default_make_symbol_completion_list (char *text
, char *word
)
4235 return default_make_symbol_completion_list_break_on (text
, word
, "");
4238 /* Return a NULL terminated array of all symbols (regardless of class)
4239 which begin by matching TEXT. If the answer is no symbols, then
4240 the return value is an array which contains only a NULL pointer. */
4243 make_symbol_completion_list (char *text
, char *word
)
4245 return current_language
->la_make_symbol_completion_list (text
, word
);
4248 /* Like make_symbol_completion_list, but suitable for use as a
4249 completion function. */
4252 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
4253 char *text
, char *word
)
4255 return make_symbol_completion_list (text
, word
);
4258 /* Like make_symbol_completion_list, but returns a list of symbols
4259 defined in a source file FILE. */
4262 make_file_symbol_completion_list (char *text
, char *word
, char *srcfile
)
4267 struct dict_iterator iter
;
4268 /* The symbol we are completing on. Points in same buffer as text. */
4270 /* Length of sym_text. */
4273 /* Now look for the symbol we are supposed to complete on.
4274 FIXME: This should be language-specific. */
4278 char *quote_pos
= NULL
;
4280 /* First see if this is a quoted string. */
4282 for (p
= text
; *p
!= '\0'; ++p
)
4284 if (quote_found
!= '\0')
4286 if (*p
== quote_found
)
4287 /* Found close quote. */
4289 else if (*p
== '\\' && p
[1] == quote_found
)
4290 /* A backslash followed by the quote character
4291 doesn't end the string. */
4294 else if (*p
== '\'' || *p
== '"')
4300 if (quote_found
== '\'')
4301 /* A string within single quotes can be a symbol, so complete on it. */
4302 sym_text
= quote_pos
+ 1;
4303 else if (quote_found
== '"')
4304 /* A double-quoted string is never a symbol, nor does it make sense
4305 to complete it any other way. */
4307 return_val
= (char **) xmalloc (sizeof (char *));
4308 return_val
[0] = NULL
;
4313 /* Not a quoted string. */
4314 sym_text
= language_search_unquoted_string (text
, p
);
4318 sym_text_len
= strlen (sym_text
);
4320 return_val_size
= 10;
4321 return_val_index
= 0;
4322 return_val
= (char **) xmalloc ((return_val_size
+ 1) * sizeof (char *));
4323 return_val
[0] = NULL
;
4325 /* Find the symtab for SRCFILE (this loads it if it was not yet read
4327 s
= lookup_symtab (srcfile
);
4330 /* Maybe they typed the file with leading directories, while the
4331 symbol tables record only its basename. */
4332 const char *tail
= lbasename (srcfile
);
4335 s
= lookup_symtab (tail
);
4338 /* If we have no symtab for that file, return an empty list. */
4340 return (return_val
);
4342 /* Go through this symtab and check the externs and statics for
4343 symbols which match. */
4345 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), GLOBAL_BLOCK
);
4346 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4348 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4351 b
= BLOCKVECTOR_BLOCK (BLOCKVECTOR (s
), STATIC_BLOCK
);
4352 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4354 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
4357 return (return_val
);
4360 /* A helper function for make_source_files_completion_list. It adds
4361 another file name to a list of possible completions, growing the
4362 list as necessary. */
4365 add_filename_to_list (const char *fname
, char *text
, char *word
,
4366 char ***list
, int *list_used
, int *list_alloced
)
4369 size_t fnlen
= strlen (fname
);
4371 if (*list_used
+ 1 >= *list_alloced
)
4374 *list
= (char **) xrealloc ((char *) *list
,
4375 *list_alloced
* sizeof (char *));
4380 /* Return exactly fname. */
4381 new = xmalloc (fnlen
+ 5);
4382 strcpy (new, fname
);
4384 else if (word
> text
)
4386 /* Return some portion of fname. */
4387 new = xmalloc (fnlen
+ 5);
4388 strcpy (new, fname
+ (word
- text
));
4392 /* Return some of TEXT plus fname. */
4393 new = xmalloc (fnlen
+ (text
- word
) + 5);
4394 strncpy (new, word
, text
- word
);
4395 new[text
- word
] = '\0';
4396 strcat (new, fname
);
4398 (*list
)[*list_used
] = new;
4399 (*list
)[++*list_used
] = NULL
;
4403 not_interesting_fname (const char *fname
)
4405 static const char *illegal_aliens
[] = {
4406 "_globals_", /* inserted by coff_symtab_read */
4411 for (i
= 0; illegal_aliens
[i
]; i
++)
4413 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
4419 /* An object of this type is passed as the user_data argument to
4420 map_partial_symbol_filenames. */
4421 struct add_partial_filename_data
4432 /* A callback for map_partial_symbol_filenames. */
4434 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
4437 struct add_partial_filename_data
*data
= user_data
;
4439 if (not_interesting_fname (filename
))
4441 if (!filename_seen (filename
, 1, data
->first
)
4442 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
4444 /* This file matches for a completion; add it to the
4445 current list of matches. */
4446 add_filename_to_list (filename
, data
->text
, data
->word
,
4447 data
->list
, data
->list_used
, data
->list_alloced
);
4451 const char *base_name
= lbasename (filename
);
4453 if (base_name
!= filename
4454 && !filename_seen (base_name
, 1, data
->first
)
4455 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
4456 add_filename_to_list (base_name
, data
->text
, data
->word
,
4457 data
->list
, data
->list_used
, data
->list_alloced
);
4461 /* Return a NULL terminated array of all source files whose names
4462 begin with matching TEXT. The file names are looked up in the
4463 symbol tables of this program. If the answer is no matchess, then
4464 the return value is an array which contains only a NULL pointer. */
4467 make_source_files_completion_list (char *text
, char *word
)
4470 struct objfile
*objfile
;
4472 int list_alloced
= 1;
4474 size_t text_len
= strlen (text
);
4475 char **list
= (char **) xmalloc (list_alloced
* sizeof (char *));
4476 const char *base_name
;
4477 struct add_partial_filename_data datum
;
4478 struct cleanup
*back_to
;
4482 if (!have_full_symbols () && !have_partial_symbols ())
4485 back_to
= make_cleanup (do_free_completion_list
, &list
);
4487 ALL_SYMTABS (objfile
, s
)
4489 if (not_interesting_fname (s
->filename
))
4491 if (!filename_seen (s
->filename
, 1, &first
)
4492 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
4494 /* This file matches for a completion; add it to the current
4496 add_filename_to_list (s
->filename
, text
, word
,
4497 &list
, &list_used
, &list_alloced
);
4501 /* NOTE: We allow the user to type a base name when the
4502 debug info records leading directories, but not the other
4503 way around. This is what subroutines of breakpoint
4504 command do when they parse file names. */
4505 base_name
= lbasename (s
->filename
);
4506 if (base_name
!= s
->filename
4507 && !filename_seen (base_name
, 1, &first
)
4508 && filename_ncmp (base_name
, text
, text_len
) == 0)
4509 add_filename_to_list (base_name
, text
, word
,
4510 &list
, &list_used
, &list_alloced
);
4514 datum
.first
= &first
;
4517 datum
.text_len
= text_len
;
4519 datum
.list_used
= &list_used
;
4520 datum
.list_alloced
= &list_alloced
;
4521 map_partial_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
4522 0 /*need_fullname*/);
4523 discard_cleanups (back_to
);
4528 /* Determine if PC is in the prologue of a function. The prologue is the area
4529 between the first instruction of a function, and the first executable line.
4530 Returns 1 if PC *might* be in prologue, 0 if definately *not* in prologue.
4532 If non-zero, func_start is where we think the prologue starts, possibly
4533 by previous examination of symbol table information. */
4536 in_prologue (struct gdbarch
*gdbarch
, CORE_ADDR pc
, CORE_ADDR func_start
)
4538 struct symtab_and_line sal
;
4539 CORE_ADDR func_addr
, func_end
;
4541 /* We have several sources of information we can consult to figure
4543 - Compilers usually emit line number info that marks the prologue
4544 as its own "source line". So the ending address of that "line"
4545 is the end of the prologue. If available, this is the most
4547 - The minimal symbols and partial symbols, which can usually tell
4548 us the starting and ending addresses of a function.
4549 - If we know the function's start address, we can call the
4550 architecture-defined gdbarch_skip_prologue function to analyze the
4551 instruction stream and guess where the prologue ends.
4552 - Our `func_start' argument; if non-zero, this is the caller's
4553 best guess as to the function's entry point. At the time of
4554 this writing, handle_inferior_event doesn't get this right, so
4555 it should be our last resort. */
4557 /* Consult the partial symbol table, to find which function
4559 if (! find_pc_partial_function (pc
, NULL
, &func_addr
, &func_end
))
4561 CORE_ADDR prologue_end
;
4563 /* We don't even have minsym information, so fall back to using
4564 func_start, if given. */
4566 return 1; /* We *might* be in a prologue. */
4568 prologue_end
= gdbarch_skip_prologue (gdbarch
, func_start
);
4570 return func_start
<= pc
&& pc
< prologue_end
;
4573 /* If we have line number information for the function, that's
4574 usually pretty reliable. */
4575 sal
= find_pc_line (func_addr
, 0);
4577 /* Now sal describes the source line at the function's entry point,
4578 which (by convention) is the prologue. The end of that "line",
4579 sal.end, is the end of the prologue.
4581 Note that, for functions whose source code is all on a single
4582 line, the line number information doesn't always end up this way.
4583 So we must verify that our purported end-of-prologue address is
4584 *within* the function, not at its start or end. */
4586 || sal
.end
<= func_addr
4587 || func_end
<= sal
.end
)
4589 /* We don't have any good line number info, so use the minsym
4590 information, together with the architecture-specific prologue
4592 CORE_ADDR prologue_end
= gdbarch_skip_prologue (gdbarch
, func_addr
);
4594 return func_addr
<= pc
&& pc
< prologue_end
;
4597 /* We have line number info, and it looks good. */
4598 return func_addr
<= pc
&& pc
< sal
.end
;
4601 /* Given PC at the function's start address, attempt to find the
4602 prologue end using SAL information. Return zero if the skip fails.
4604 A non-optimized prologue traditionally has one SAL for the function
4605 and a second for the function body. A single line function has
4606 them both pointing at the same line.
4608 An optimized prologue is similar but the prologue may contain
4609 instructions (SALs) from the instruction body. Need to skip those
4610 while not getting into the function body.
4612 The functions end point and an increasing SAL line are used as
4613 indicators of the prologue's endpoint.
4615 This code is based on the function refine_prologue_limit
4619 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
4621 struct symtab_and_line prologue_sal
;
4626 /* Get an initial range for the function. */
4627 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
4628 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
4630 prologue_sal
= find_pc_line (start_pc
, 0);
4631 if (prologue_sal
.line
!= 0)
4633 /* For languages other than assembly, treat two consecutive line
4634 entries at the same address as a zero-instruction prologue.
4635 The GNU assembler emits separate line notes for each instruction
4636 in a multi-instruction macro, but compilers generally will not
4638 if (prologue_sal
.symtab
->language
!= language_asm
)
4640 struct linetable
*linetable
= LINETABLE (prologue_sal
.symtab
);
4643 /* Skip any earlier lines, and any end-of-sequence marker
4644 from a previous function. */
4645 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
4646 || linetable
->item
[idx
].line
== 0)
4649 if (idx
+1 < linetable
->nitems
4650 && linetable
->item
[idx
+1].line
!= 0
4651 && linetable
->item
[idx
+1].pc
== start_pc
)
4655 /* If there is only one sal that covers the entire function,
4656 then it is probably a single line function, like
4658 if (prologue_sal
.end
>= end_pc
)
4661 while (prologue_sal
.end
< end_pc
)
4663 struct symtab_and_line sal
;
4665 sal
= find_pc_line (prologue_sal
.end
, 0);
4668 /* Assume that a consecutive SAL for the same (or larger)
4669 line mark the prologue -> body transition. */
4670 if (sal
.line
>= prologue_sal
.line
)
4673 /* The line number is smaller. Check that it's from the
4674 same function, not something inlined. If it's inlined,
4675 then there is no point comparing the line numbers. */
4676 bl
= block_for_pc (prologue_sal
.end
);
4679 if (block_inlined_p (bl
))
4681 if (BLOCK_FUNCTION (bl
))
4686 bl
= BLOCK_SUPERBLOCK (bl
);
4691 /* The case in which compiler's optimizer/scheduler has
4692 moved instructions into the prologue. We look ahead in
4693 the function looking for address ranges whose
4694 corresponding line number is less the first one that we
4695 found for the function. This is more conservative then
4696 refine_prologue_limit which scans a large number of SALs
4697 looking for any in the prologue. */
4702 if (prologue_sal
.end
< end_pc
)
4703 /* Return the end of this line, or zero if we could not find a
4705 return prologue_sal
.end
;
4707 /* Don't return END_PC, which is past the end of the function. */
4708 return prologue_sal
.pc
;
4711 struct symtabs_and_lines
4712 decode_line_spec (char *string
, int flags
)
4714 struct symtabs_and_lines sals
;
4715 struct symtab_and_line cursal
;
4718 error (_("Empty line specification."));
4720 /* We use whatever is set as the current source line. We do not try
4721 and get a default or it will recursively call us! */
4722 cursal
= get_current_source_symtab_and_line ();
4724 sals
= decode_line_1 (&string
, flags
,
4725 cursal
.symtab
, cursal
.line
);
4728 error (_("Junk at end of line specification: %s"), string
);
4733 static char *name_of_main
;
4734 enum language language_of_main
= language_unknown
;
4737 set_main_name (const char *name
)
4739 if (name_of_main
!= NULL
)
4741 xfree (name_of_main
);
4742 name_of_main
= NULL
;
4743 language_of_main
= language_unknown
;
4747 name_of_main
= xstrdup (name
);
4748 language_of_main
= language_unknown
;
4752 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
4756 find_main_name (void)
4758 const char *new_main_name
;
4760 /* Try to see if the main procedure is in Ada. */
4761 /* FIXME: brobecker/2005-03-07: Another way of doing this would
4762 be to add a new method in the language vector, and call this
4763 method for each language until one of them returns a non-empty
4764 name. This would allow us to remove this hard-coded call to
4765 an Ada function. It is not clear that this is a better approach
4766 at this point, because all methods need to be written in a way
4767 such that false positives never be returned. For instance, it is
4768 important that a method does not return a wrong name for the main
4769 procedure if the main procedure is actually written in a different
4770 language. It is easy to guaranty this with Ada, since we use a
4771 special symbol generated only when the main in Ada to find the name
4772 of the main procedure. It is difficult however to see how this can
4773 be guarantied for languages such as C, for instance. This suggests
4774 that order of call for these methods becomes important, which means
4775 a more complicated approach. */
4776 new_main_name
= ada_main_name ();
4777 if (new_main_name
!= NULL
)
4779 set_main_name (new_main_name
);
4783 new_main_name
= pascal_main_name ();
4784 if (new_main_name
!= NULL
)
4786 set_main_name (new_main_name
);
4790 /* The languages above didn't identify the name of the main procedure.
4791 Fallback to "main". */
4792 set_main_name ("main");
4798 if (name_of_main
== NULL
)
4801 return name_of_main
;
4804 /* Handle ``executable_changed'' events for the symtab module. */
4807 symtab_observer_executable_changed (void)
4809 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
4810 set_main_name (NULL
);
4813 /* Return 1 if the supplied producer string matches the ARM RealView
4814 compiler (armcc). */
4817 producer_is_realview (const char *producer
)
4819 static const char *const arm_idents
[] = {
4820 "ARM C Compiler, ADS",
4821 "Thumb C Compiler, ADS",
4822 "ARM C++ Compiler, ADS",
4823 "Thumb C++ Compiler, ADS",
4824 "ARM/Thumb C/C++ Compiler, RVCT",
4825 "ARM C/C++ Compiler, RVCT"
4829 if (producer
== NULL
)
4832 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
4833 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
4840 _initialize_symtab (void)
4842 add_info ("variables", variables_info
, _("\
4843 All global and static variable names, or those matching REGEXP."));
4845 add_com ("whereis", class_info
, variables_info
, _("\
4846 All global and static variable names, or those matching REGEXP."));
4848 add_info ("functions", functions_info
,
4849 _("All function names, or those matching REGEXP."));
4851 /* FIXME: This command has at least the following problems:
4852 1. It prints builtin types (in a very strange and confusing fashion).
4853 2. It doesn't print right, e.g. with
4854 typedef struct foo *FOO
4855 type_print prints "FOO" when we want to make it (in this situation)
4856 print "struct foo *".
4857 I also think "ptype" or "whatis" is more likely to be useful (but if
4858 there is much disagreement "info types" can be fixed). */
4859 add_info ("types", types_info
,
4860 _("All type names, or those matching REGEXP."));
4862 add_info ("sources", sources_info
,
4863 _("Source files in the program."));
4865 add_com ("rbreak", class_breakpoint
, rbreak_command
,
4866 _("Set a breakpoint for all functions matching REGEXP."));
4870 add_com ("lf", class_info
, sources_info
,
4871 _("Source files in the program"));
4872 add_com ("lg", class_info
, variables_info
, _("\
4873 All global and static variable names, or those matching REGEXP."));
4876 add_setshow_enum_cmd ("multiple-symbols", no_class
,
4877 multiple_symbols_modes
, &multiple_symbols_mode
,
4879 Set the debugger behavior when more than one symbol are possible matches\n\
4880 in an expression."), _("\
4881 Show how the debugger handles ambiguities in expressions."), _("\
4882 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
4883 NULL
, NULL
, &setlist
, &showlist
);
4885 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
4886 &basenames_may_differ
, _("\
4887 Set whether a source file may have multiple base names."), _("\
4888 Show whether a source file may have multiple base names."), _("\
4889 (A \"base name\" is the name of a file with the directory part removed.\n\
4890 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
4891 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
4892 before comparing them. Canonicalization is an expensive operation,\n\
4893 but it allows the same file be known by more than one base name.\n\
4894 If not set (the default), all source files are assumed to have just\n\
4895 one base name, and gdb will do file name comparisons more efficiently."),
4897 &setlist
, &showlist
);
4899 observer_attach_executable_changed (symtab_observer_executable_changed
);