1 /* Symbol table lookup for the GNU debugger, GDB.
3 Copyright (C) 1986-2015 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 "gdb_regex.h"
31 #include "expression.h"
36 #include "filenames.h" /* for FILENAME_CMP */
37 #include "objc-lang.h"
43 #include "cli/cli-utils.h"
47 #include "gdb_obstack.h"
49 #include "dictionary.h"
51 #include <sys/types.h>
56 #include "cp-support.h"
60 #include "macroscope.h"
62 #include "parser-defs.h"
64 /* Forward declarations for local functions. */
66 static void rbreak_command (char *, int);
68 static int find_line_common (struct linetable
*, int, int *, int);
70 static struct symbol
*lookup_symbol_aux (const char *name
,
71 const struct block
*block
,
72 const domain_enum domain
,
73 enum language language
,
74 struct field_of_this_result
*);
77 struct symbol
*lookup_local_symbol (const char *name
,
78 const struct block
*block
,
79 const domain_enum domain
,
80 enum language language
);
82 static struct symbol
*
83 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
84 const char *name
, const domain_enum domain
);
86 extern initialize_file_ftype _initialize_symtab
;
88 /* Program space key for finding name and language of "main". */
90 static const struct program_space_data
*main_progspace_key
;
92 /* Type of the data stored on the program space. */
100 /* Language of "main". */
102 enum language language_of_main
;
105 /* Program space key for finding its symbol cache. */
107 static const struct program_space_data
*symbol_cache_key
;
109 /* The default symbol cache size.
110 There is no extra cpu cost for large N (except when flushing the cache,
111 which is rare). The value here is just a first attempt. A better default
112 value may be higher or lower. A prime number can make up for a bad hash
113 computation, so that's why the number is what it is. */
114 #define DEFAULT_SYMBOL_CACHE_SIZE 1021
116 /* The maximum symbol cache size.
117 There's no method to the decision of what value to use here, other than
118 there's no point in allowing a user typo to make gdb consume all memory. */
119 #define MAX_SYMBOL_CACHE_SIZE (1024*1024)
121 /* symbol_cache_lookup returns this if a previous lookup failed to find the
122 symbol in any objfile. */
123 #define SYMBOL_LOOKUP_FAILED ((struct symbol *) 1)
125 /* Recording lookups that don't find the symbol is just as important, if not
126 more so, than recording found symbols. */
128 enum symbol_cache_slot_state
131 SYMBOL_SLOT_NOT_FOUND
,
135 /* Symbols don't specify global vs static block.
136 So keep them in separate caches. */
138 struct block_symbol_cache
142 unsigned int collisions
;
144 /* SYMBOLS is a variable length array of this size.
145 One can imagine that in general one cache (global/static) should be a
146 fraction of the size of the other, but there's no data at the moment
147 on which to decide. */
150 struct symbol_cache_slot
152 enum symbol_cache_slot_state state
;
154 /* The objfile that was current when the symbol was looked up.
155 This is only needed for global blocks, but for simplicity's sake
156 we allocate the space for both. If data shows the extra space used
157 for static blocks is a problem, we can split things up then.
159 Global blocks need cache lookup to include the objfile context because
160 we need to account for gdbarch_iterate_over_objfiles_in_search_order
161 which can traverse objfiles in, effectively, any order, depending on
162 the current objfile, thus affecting which symbol is found. Normally,
163 only the current objfile is searched first, and then the rest are
164 searched in recorded order; but putting cache lookup inside
165 gdbarch_iterate_over_objfiles_in_search_order would be awkward.
166 Instead we just make the current objfile part of the context of
167 cache lookup. This means we can record the same symbol multiple times,
168 each with a different "current objfile" that was in effect when the
169 lookup was saved in the cache, but cache space is pretty cheap. */
170 const struct objfile
*objfile_context
;
174 struct symbol
*found
;
186 Searching for symbols in the static and global blocks over multiple objfiles
187 again and again can be slow, as can searching very big objfiles. This is a
188 simple cache to improve symbol lookup performance, which is critical to
189 overall gdb performance.
191 Symbols are hashed on the name, its domain, and block.
192 They are also hashed on their objfile for objfile-specific lookups. */
196 struct block_symbol_cache
*global_symbols
;
197 struct block_symbol_cache
*static_symbols
;
200 /* When non-zero, print debugging messages related to symtab creation. */
201 unsigned int symtab_create_debug
= 0;
203 /* When non-zero, print debugging messages related to symbol lookup. */
204 unsigned int symbol_lookup_debug
= 0;
206 /* The size of the cache is staged here. */
207 static unsigned int new_symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
209 /* The current value of the symbol cache size.
210 This is saved so that if the user enters a value too big we can restore
211 the original value from here. */
212 static unsigned int symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
214 /* Non-zero if a file may be known by two different basenames.
215 This is the uncommon case, and significantly slows down gdb.
216 Default set to "off" to not slow down the common case. */
217 int basenames_may_differ
= 0;
219 /* Allow the user to configure the debugger behavior with respect
220 to multiple-choice menus when more than one symbol matches during
223 const char multiple_symbols_ask
[] = "ask";
224 const char multiple_symbols_all
[] = "all";
225 const char multiple_symbols_cancel
[] = "cancel";
226 static const char *const multiple_symbols_modes
[] =
228 multiple_symbols_ask
,
229 multiple_symbols_all
,
230 multiple_symbols_cancel
,
233 static const char *multiple_symbols_mode
= multiple_symbols_all
;
235 /* Read-only accessor to AUTO_SELECT_MODE. */
238 multiple_symbols_select_mode (void)
240 return multiple_symbols_mode
;
243 /* Block in which the most recently searched-for symbol was found.
244 Might be better to make this a parameter to lookup_symbol and
247 const struct block
*block_found
;
249 /* Return the name of a domain_enum. */
252 domain_name (domain_enum e
)
256 case UNDEF_DOMAIN
: return "UNDEF_DOMAIN";
257 case VAR_DOMAIN
: return "VAR_DOMAIN";
258 case STRUCT_DOMAIN
: return "STRUCT_DOMAIN";
259 case MODULE_DOMAIN
: return "MODULE_DOMAIN";
260 case LABEL_DOMAIN
: return "LABEL_DOMAIN";
261 case COMMON_BLOCK_DOMAIN
: return "COMMON_BLOCK_DOMAIN";
262 default: gdb_assert_not_reached ("bad domain_enum");
266 /* Return the name of a search_domain . */
269 search_domain_name (enum search_domain e
)
273 case VARIABLES_DOMAIN
: return "VARIABLES_DOMAIN";
274 case FUNCTIONS_DOMAIN
: return "FUNCTIONS_DOMAIN";
275 case TYPES_DOMAIN
: return "TYPES_DOMAIN";
276 case ALL_DOMAIN
: return "ALL_DOMAIN";
277 default: gdb_assert_not_reached ("bad search_domain");
284 compunit_primary_filetab (const struct compunit_symtab
*cust
)
286 gdb_assert (COMPUNIT_FILETABS (cust
) != NULL
);
288 /* The primary file symtab is the first one in the list. */
289 return COMPUNIT_FILETABS (cust
);
295 compunit_language (const struct compunit_symtab
*cust
)
297 struct symtab
*symtab
= compunit_primary_filetab (cust
);
299 /* The language of the compunit symtab is the language of its primary
301 return SYMTAB_LANGUAGE (symtab
);
304 /* See whether FILENAME matches SEARCH_NAME using the rule that we
305 advertise to the user. (The manual's description of linespecs
306 describes what we advertise). Returns true if they match, false
310 compare_filenames_for_search (const char *filename
, const char *search_name
)
312 int len
= strlen (filename
);
313 size_t search_len
= strlen (search_name
);
315 if (len
< search_len
)
318 /* The tail of FILENAME must match. */
319 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
322 /* Either the names must completely match, or the character
323 preceding the trailing SEARCH_NAME segment of FILENAME must be a
326 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
327 cannot match FILENAME "/path//dir/file.c" - as user has requested
328 absolute path. The sama applies for "c:\file.c" possibly
329 incorrectly hypothetically matching "d:\dir\c:\file.c".
331 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
332 compatible with SEARCH_NAME "file.c". In such case a compiler had
333 to put the "c:file.c" name into debug info. Such compatibility
334 works only on GDB built for DOS host. */
335 return (len
== search_len
336 || (!IS_ABSOLUTE_PATH (search_name
)
337 && IS_DIR_SEPARATOR (filename
[len
- search_len
- 1]))
338 || (HAS_DRIVE_SPEC (filename
)
339 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
342 /* Check for a symtab of a specific name by searching some symtabs.
343 This is a helper function for callbacks of iterate_over_symtabs.
345 If NAME is not absolute, then REAL_PATH is NULL
346 If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME.
348 The return value, NAME, REAL_PATH, CALLBACK, and DATA
349 are identical to the `map_symtabs_matching_filename' method of
350 quick_symbol_functions.
352 FIRST and AFTER_LAST indicate the range of compunit symtabs to search.
353 Each symtab within the specified compunit symtab is also searched.
354 AFTER_LAST is one past the last compunit symtab to search; NULL means to
355 search until the end of the list. */
358 iterate_over_some_symtabs (const char *name
,
359 const char *real_path
,
360 int (*callback
) (struct symtab
*symtab
,
363 struct compunit_symtab
*first
,
364 struct compunit_symtab
*after_last
)
366 struct compunit_symtab
*cust
;
368 const char* base_name
= lbasename (name
);
370 for (cust
= first
; cust
!= NULL
&& cust
!= after_last
; cust
= cust
->next
)
372 ALL_COMPUNIT_FILETABS (cust
, s
)
374 if (compare_filenames_for_search (s
->filename
, name
))
376 if (callback (s
, data
))
381 /* Before we invoke realpath, which can get expensive when many
382 files are involved, do a quick comparison of the basenames. */
383 if (! basenames_may_differ
384 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
387 if (compare_filenames_for_search (symtab_to_fullname (s
), name
))
389 if (callback (s
, data
))
394 /* If the user gave us an absolute path, try to find the file in
395 this symtab and use its absolute path. */
396 if (real_path
!= NULL
)
398 const char *fullname
= symtab_to_fullname (s
);
400 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
401 gdb_assert (IS_ABSOLUTE_PATH (name
));
402 if (FILENAME_CMP (real_path
, fullname
) == 0)
404 if (callback (s
, data
))
415 /* Check for a symtab of a specific name; first in symtabs, then in
416 psymtabs. *If* there is no '/' in the name, a match after a '/'
417 in the symtab filename will also work.
419 Calls CALLBACK with each symtab that is found and with the supplied
420 DATA. If CALLBACK returns true, the search stops. */
423 iterate_over_symtabs (const char *name
,
424 int (*callback
) (struct symtab
*symtab
,
428 struct objfile
*objfile
;
429 char *real_path
= NULL
;
430 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
432 /* Here we are interested in canonicalizing an absolute path, not
433 absolutizing a relative path. */
434 if (IS_ABSOLUTE_PATH (name
))
436 real_path
= gdb_realpath (name
);
437 make_cleanup (xfree
, real_path
);
438 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
441 ALL_OBJFILES (objfile
)
443 if (iterate_over_some_symtabs (name
, real_path
, callback
, data
,
444 objfile
->compunit_symtabs
, NULL
))
446 do_cleanups (cleanups
);
451 /* Same search rules as above apply here, but now we look thru the
454 ALL_OBJFILES (objfile
)
457 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
463 do_cleanups (cleanups
);
468 do_cleanups (cleanups
);
471 /* The callback function used by lookup_symtab. */
474 lookup_symtab_callback (struct symtab
*symtab
, void *data
)
476 struct symtab
**result_ptr
= data
;
478 *result_ptr
= symtab
;
482 /* A wrapper for iterate_over_symtabs that returns the first matching
486 lookup_symtab (const char *name
)
488 struct symtab
*result
= NULL
;
490 iterate_over_symtabs (name
, lookup_symtab_callback
, &result
);
495 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
496 full method name, which consist of the class name (from T), the unadorned
497 method name from METHOD_ID, and the signature for the specific overload,
498 specified by SIGNATURE_ID. Note that this function is g++ specific. */
501 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
503 int mangled_name_len
;
505 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
506 struct fn_field
*method
= &f
[signature_id
];
507 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
508 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
509 const char *newname
= type_name_no_tag (type
);
511 /* Does the form of physname indicate that it is the full mangled name
512 of a constructor (not just the args)? */
513 int is_full_physname_constructor
;
516 int is_destructor
= is_destructor_name (physname
);
517 /* Need a new type prefix. */
518 char *const_prefix
= method
->is_const
? "C" : "";
519 char *volatile_prefix
= method
->is_volatile
? "V" : "";
521 int len
= (newname
== NULL
? 0 : strlen (newname
));
523 /* Nothing to do if physname already contains a fully mangled v3 abi name
524 or an operator name. */
525 if ((physname
[0] == '_' && physname
[1] == 'Z')
526 || is_operator_name (field_name
))
527 return xstrdup (physname
);
529 is_full_physname_constructor
= is_constructor_name (physname
);
531 is_constructor
= is_full_physname_constructor
532 || (newname
&& strcmp (field_name
, newname
) == 0);
535 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
537 if (is_destructor
|| is_full_physname_constructor
)
539 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
540 strcpy (mangled_name
, physname
);
546 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
548 else if (physname
[0] == 't' || physname
[0] == 'Q')
550 /* The physname for template and qualified methods already includes
552 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
558 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
559 volatile_prefix
, len
);
561 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
562 + strlen (buf
) + len
+ strlen (physname
) + 1);
564 mangled_name
= (char *) xmalloc (mangled_name_len
);
566 mangled_name
[0] = '\0';
568 strcpy (mangled_name
, field_name
);
570 strcat (mangled_name
, buf
);
571 /* If the class doesn't have a name, i.e. newname NULL, then we just
572 mangle it using 0 for the length of the class. Thus it gets mangled
573 as something starting with `::' rather than `classname::'. */
575 strcat (mangled_name
, newname
);
577 strcat (mangled_name
, physname
);
578 return (mangled_name
);
581 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
582 correctly allocated. */
585 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
587 struct obstack
*obstack
)
589 if (gsymbol
->language
== language_ada
)
593 gsymbol
->ada_mangled
= 0;
594 gsymbol
->language_specific
.obstack
= obstack
;
598 gsymbol
->ada_mangled
= 1;
599 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
603 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
606 /* Return the demangled name of GSYMBOL. */
609 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
611 if (gsymbol
->language
== language_ada
)
613 if (!gsymbol
->ada_mangled
)
618 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
622 /* Initialize the language dependent portion of a symbol
623 depending upon the language for the symbol. */
626 symbol_set_language (struct general_symbol_info
*gsymbol
,
627 enum language language
,
628 struct obstack
*obstack
)
630 gsymbol
->language
= language
;
631 if (gsymbol
->language
== language_cplus
632 || gsymbol
->language
== language_d
633 || gsymbol
->language
== language_go
634 || gsymbol
->language
== language_java
635 || gsymbol
->language
== language_objc
636 || gsymbol
->language
== language_fortran
)
638 symbol_set_demangled_name (gsymbol
, NULL
, obstack
);
640 else if (gsymbol
->language
== language_ada
)
642 gdb_assert (gsymbol
->ada_mangled
== 0);
643 gsymbol
->language_specific
.obstack
= obstack
;
647 memset (&gsymbol
->language_specific
, 0,
648 sizeof (gsymbol
->language_specific
));
652 /* Functions to initialize a symbol's mangled name. */
654 /* Objects of this type are stored in the demangled name hash table. */
655 struct demangled_name_entry
661 /* Hash function for the demangled name hash. */
664 hash_demangled_name_entry (const void *data
)
666 const struct demangled_name_entry
*e
= data
;
668 return htab_hash_string (e
->mangled
);
671 /* Equality function for the demangled name hash. */
674 eq_demangled_name_entry (const void *a
, const void *b
)
676 const struct demangled_name_entry
*da
= a
;
677 const struct demangled_name_entry
*db
= b
;
679 return strcmp (da
->mangled
, db
->mangled
) == 0;
682 /* Create the hash table used for demangled names. Each hash entry is
683 a pair of strings; one for the mangled name and one for the demangled
684 name. The entry is hashed via just the mangled name. */
687 create_demangled_names_hash (struct objfile
*objfile
)
689 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
690 The hash table code will round this up to the next prime number.
691 Choosing a much larger table size wastes memory, and saves only about
692 1% in symbol reading. */
694 objfile
->per_bfd
->demangled_names_hash
= htab_create_alloc
695 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
696 NULL
, xcalloc
, xfree
);
699 /* Try to determine the demangled name for a symbol, based on the
700 language of that symbol. If the language is set to language_auto,
701 it will attempt to find any demangling algorithm that works and
702 then set the language appropriately. The returned name is allocated
703 by the demangler and should be xfree'd. */
706 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
709 char *demangled
= NULL
;
711 if (gsymbol
->language
== language_unknown
)
712 gsymbol
->language
= language_auto
;
714 if (gsymbol
->language
== language_objc
715 || gsymbol
->language
== language_auto
)
718 objc_demangle (mangled
, 0);
719 if (demangled
!= NULL
)
721 gsymbol
->language
= language_objc
;
725 if (gsymbol
->language
== language_cplus
726 || gsymbol
->language
== language_auto
)
729 gdb_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
730 if (demangled
!= NULL
)
732 gsymbol
->language
= language_cplus
;
736 if (gsymbol
->language
== language_java
)
739 gdb_demangle (mangled
,
740 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
741 if (demangled
!= NULL
)
743 gsymbol
->language
= language_java
;
747 if (gsymbol
->language
== language_d
748 || gsymbol
->language
== language_auto
)
750 demangled
= d_demangle(mangled
, 0);
751 if (demangled
!= NULL
)
753 gsymbol
->language
= language_d
;
757 /* FIXME(dje): Continually adding languages here is clumsy.
758 Better to just call la_demangle if !auto, and if auto then call
759 a utility routine that tries successive languages in turn and reports
760 which one it finds. I realize the la_demangle options may be different
761 for different languages but there's already a FIXME for that. */
762 if (gsymbol
->language
== language_go
763 || gsymbol
->language
== language_auto
)
765 demangled
= go_demangle (mangled
, 0);
766 if (demangled
!= NULL
)
768 gsymbol
->language
= language_go
;
773 /* We could support `gsymbol->language == language_fortran' here to provide
774 module namespaces also for inferiors with only minimal symbol table (ELF
775 symbols). Just the mangling standard is not standardized across compilers
776 and there is no DW_AT_producer available for inferiors with only the ELF
777 symbols to check the mangling kind. */
779 /* Check for Ada symbols last. See comment below explaining why. */
781 if (gsymbol
->language
== language_auto
)
783 const char *demangled
= ada_decode (mangled
);
785 if (demangled
!= mangled
&& demangled
!= NULL
&& demangled
[0] != '<')
787 /* Set the gsymbol language to Ada, but still return NULL.
788 Two reasons for that:
790 1. For Ada, we prefer computing the symbol's decoded name
791 on the fly rather than pre-compute it, in order to save
792 memory (Ada projects are typically very large).
794 2. There are some areas in the definition of the GNAT
795 encoding where, with a bit of bad luck, we might be able
796 to decode a non-Ada symbol, generating an incorrect
797 demangled name (Eg: names ending with "TB" for instance
798 are identified as task bodies and so stripped from
799 the decoded name returned).
801 Returning NULL, here, helps us get a little bit of
802 the best of both worlds. Because we're last, we should
803 not affect any of the other languages that were able to
804 demangle the symbol before us; we get to correctly tag
805 Ada symbols as such; and even if we incorrectly tagged
806 a non-Ada symbol, which should be rare, any routing
807 through the Ada language should be transparent (Ada
808 tries to behave much like C/C++ with non-Ada symbols). */
809 gsymbol
->language
= language_ada
;
817 /* Set both the mangled and demangled (if any) names for GSYMBOL based
818 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
819 objfile's obstack; but if COPY_NAME is 0 and if NAME is
820 NUL-terminated, then this function assumes that NAME is already
821 correctly saved (either permanently or with a lifetime tied to the
822 objfile), and it will not be copied.
824 The hash table corresponding to OBJFILE is used, and the memory
825 comes from the per-BFD storage_obstack. LINKAGE_NAME is copied,
826 so the pointer can be discarded after calling this function. */
828 /* We have to be careful when dealing with Java names: when we run
829 into a Java minimal symbol, we don't know it's a Java symbol, so it
830 gets demangled as a C++ name. This is unfortunate, but there's not
831 much we can do about it: but when demangling partial symbols and
832 regular symbols, we'd better not reuse the wrong demangled name.
833 (See PR gdb/1039.) We solve this by putting a distinctive prefix
834 on Java names when storing them in the hash table. */
836 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
837 don't mind the Java prefix so much: different languages have
838 different demangling requirements, so it's only natural that we
839 need to keep language data around in our demangling cache. But
840 it's not good that the minimal symbol has the wrong demangled name.
841 Unfortunately, I can't think of any easy solution to that
844 #define JAVA_PREFIX "##JAVA$$"
845 #define JAVA_PREFIX_LEN 8
848 symbol_set_names (struct general_symbol_info
*gsymbol
,
849 const char *linkage_name
, int len
, int copy_name
,
850 struct objfile
*objfile
)
852 struct demangled_name_entry
**slot
;
853 /* A 0-terminated copy of the linkage name. */
854 const char *linkage_name_copy
;
855 /* A copy of the linkage name that might have a special Java prefix
856 added to it, for use when looking names up in the hash table. */
857 const char *lookup_name
;
858 /* The length of lookup_name. */
860 struct demangled_name_entry entry
;
861 struct objfile_per_bfd_storage
*per_bfd
= objfile
->per_bfd
;
863 if (gsymbol
->language
== language_ada
)
865 /* In Ada, we do the symbol lookups using the mangled name, so
866 we can save some space by not storing the demangled name.
868 As a side note, we have also observed some overlap between
869 the C++ mangling and Ada mangling, similarly to what has
870 been observed with Java. Because we don't store the demangled
871 name with the symbol, we don't need to use the same trick
874 gsymbol
->name
= linkage_name
;
877 char *name
= obstack_alloc (&per_bfd
->storage_obstack
, len
+ 1);
879 memcpy (name
, linkage_name
, len
);
881 gsymbol
->name
= name
;
883 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
888 if (per_bfd
->demangled_names_hash
== NULL
)
889 create_demangled_names_hash (objfile
);
891 /* The stabs reader generally provides names that are not
892 NUL-terminated; most of the other readers don't do this, so we
893 can just use the given copy, unless we're in the Java case. */
894 if (gsymbol
->language
== language_java
)
898 lookup_len
= len
+ JAVA_PREFIX_LEN
;
899 alloc_name
= alloca (lookup_len
+ 1);
900 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
901 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
902 alloc_name
[lookup_len
] = '\0';
904 lookup_name
= alloc_name
;
905 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
907 else if (linkage_name
[len
] != '\0')
912 alloc_name
= alloca (lookup_len
+ 1);
913 memcpy (alloc_name
, linkage_name
, len
);
914 alloc_name
[lookup_len
] = '\0';
916 lookup_name
= alloc_name
;
917 linkage_name_copy
= alloc_name
;
922 lookup_name
= linkage_name
;
923 linkage_name_copy
= linkage_name
;
926 entry
.mangled
= lookup_name
;
927 slot
= ((struct demangled_name_entry
**)
928 htab_find_slot (per_bfd
->demangled_names_hash
,
931 /* If this name is not in the hash table, add it. */
933 /* A C version of the symbol may have already snuck into the table.
934 This happens to, e.g., main.init (__go_init_main). Cope. */
935 || (gsymbol
->language
== language_go
936 && (*slot
)->demangled
[0] == '\0'))
938 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
940 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
942 /* Suppose we have demangled_name==NULL, copy_name==0, and
943 lookup_name==linkage_name. In this case, we already have the
944 mangled name saved, and we don't have a demangled name. So,
945 you might think we could save a little space by not recording
946 this in the hash table at all.
948 It turns out that it is actually important to still save such
949 an entry in the hash table, because storing this name gives
950 us better bcache hit rates for partial symbols. */
951 if (!copy_name
&& lookup_name
== linkage_name
)
953 *slot
= obstack_alloc (&per_bfd
->storage_obstack
,
954 offsetof (struct demangled_name_entry
,
956 + demangled_len
+ 1);
957 (*slot
)->mangled
= lookup_name
;
963 /* If we must copy the mangled name, put it directly after
964 the demangled name so we can have a single
966 *slot
= obstack_alloc (&per_bfd
->storage_obstack
,
967 offsetof (struct demangled_name_entry
,
969 + lookup_len
+ demangled_len
+ 2);
970 mangled_ptr
= &((*slot
)->demangled
[demangled_len
+ 1]);
971 strcpy (mangled_ptr
, lookup_name
);
972 (*slot
)->mangled
= mangled_ptr
;
975 if (demangled_name
!= NULL
)
977 strcpy ((*slot
)->demangled
, demangled_name
);
978 xfree (demangled_name
);
981 (*slot
)->demangled
[0] = '\0';
984 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
985 if ((*slot
)->demangled
[0] != '\0')
986 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
,
987 &per_bfd
->storage_obstack
);
989 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
992 /* Return the source code name of a symbol. In languages where
993 demangling is necessary, this is the demangled name. */
996 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
998 switch (gsymbol
->language
)
1000 case language_cplus
:
1005 case language_fortran
:
1006 if (symbol_get_demangled_name (gsymbol
) != NULL
)
1007 return symbol_get_demangled_name (gsymbol
);
1010 return ada_decode_symbol (gsymbol
);
1014 return gsymbol
->name
;
1017 /* Return the demangled name for a symbol based on the language for
1018 that symbol. If no demangled name exists, return NULL. */
1021 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
1023 const char *dem_name
= NULL
;
1025 switch (gsymbol
->language
)
1027 case language_cplus
:
1032 case language_fortran
:
1033 dem_name
= symbol_get_demangled_name (gsymbol
);
1036 dem_name
= ada_decode_symbol (gsymbol
);
1044 /* Return the search name of a symbol---generally the demangled or
1045 linkage name of the symbol, depending on how it will be searched for.
1046 If there is no distinct demangled name, then returns the same value
1047 (same pointer) as SYMBOL_LINKAGE_NAME. */
1050 symbol_search_name (const struct general_symbol_info
*gsymbol
)
1052 if (gsymbol
->language
== language_ada
)
1053 return gsymbol
->name
;
1055 return symbol_natural_name (gsymbol
);
1058 /* Initialize the structure fields to zero values. */
1061 init_sal (struct symtab_and_line
*sal
)
1063 memset (sal
, 0, sizeof (*sal
));
1067 /* Return 1 if the two sections are the same, or if they could
1068 plausibly be copies of each other, one in an original object
1069 file and another in a separated debug file. */
1072 matching_obj_sections (struct obj_section
*obj_first
,
1073 struct obj_section
*obj_second
)
1075 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
1076 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
1077 struct objfile
*obj
;
1079 /* If they're the same section, then they match. */
1080 if (first
== second
)
1083 /* If either is NULL, give up. */
1084 if (first
== NULL
|| second
== NULL
)
1087 /* This doesn't apply to absolute symbols. */
1088 if (first
->owner
== NULL
|| second
->owner
== NULL
)
1091 /* If they're in the same object file, they must be different sections. */
1092 if (first
->owner
== second
->owner
)
1095 /* Check whether the two sections are potentially corresponding. They must
1096 have the same size, address, and name. We can't compare section indexes,
1097 which would be more reliable, because some sections may have been
1099 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
1102 /* In-memory addresses may start at a different offset, relativize them. */
1103 if (bfd_get_section_vma (first
->owner
, first
)
1104 - bfd_get_start_address (first
->owner
)
1105 != bfd_get_section_vma (second
->owner
, second
)
1106 - bfd_get_start_address (second
->owner
))
1109 if (bfd_get_section_name (first
->owner
, first
) == NULL
1110 || bfd_get_section_name (second
->owner
, second
) == NULL
1111 || strcmp (bfd_get_section_name (first
->owner
, first
),
1112 bfd_get_section_name (second
->owner
, second
)) != 0)
1115 /* Otherwise check that they are in corresponding objfiles. */
1118 if (obj
->obfd
== first
->owner
)
1120 gdb_assert (obj
!= NULL
);
1122 if (obj
->separate_debug_objfile
!= NULL
1123 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
1125 if (obj
->separate_debug_objfile_backlink
!= NULL
1126 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
1135 expand_symtab_containing_pc (CORE_ADDR pc
, struct obj_section
*section
)
1137 struct objfile
*objfile
;
1138 struct bound_minimal_symbol msymbol
;
1140 /* If we know that this is not a text address, return failure. This is
1141 necessary because we loop based on texthigh and textlow, which do
1142 not include the data ranges. */
1143 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1145 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
1146 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
1147 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
1148 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
1149 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
1152 ALL_OBJFILES (objfile
)
1154 struct compunit_symtab
*cust
= NULL
;
1157 cust
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
, msymbol
,
1164 /* Hash function for the symbol cache. */
1167 hash_symbol_entry (const struct objfile
*objfile_context
,
1168 const char *name
, domain_enum domain
)
1170 unsigned int hash
= (uintptr_t) objfile_context
;
1173 hash
+= htab_hash_string (name
);
1180 /* Equality function for the symbol cache. */
1183 eq_symbol_entry (const struct symbol_cache_slot
*slot
,
1184 const struct objfile
*objfile_context
,
1185 const char *name
, domain_enum domain
)
1187 const char *slot_name
;
1188 domain_enum slot_domain
;
1190 if (slot
->state
== SYMBOL_SLOT_UNUSED
)
1193 if (slot
->objfile_context
!= objfile_context
)
1196 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1198 slot_name
= slot
->value
.not_found
.name
;
1199 slot_domain
= slot
->value
.not_found
.domain
;
1203 slot_name
= SYMBOL_LINKAGE_NAME (slot
->value
.found
);
1204 slot_domain
= SYMBOL_DOMAIN (slot
->value
.found
);
1207 /* NULL names match. */
1208 if (slot_name
== NULL
&& name
== NULL
)
1210 else if (slot_name
!= NULL
&& name
!= NULL
)
1212 if (strcmp (slot_name
, name
) != 0)
1217 /* Only one name is NULL. */
1221 if (slot_domain
!= domain
)
1227 /* Given a cache of size SIZE, return the size of the struct (with variable
1228 length array) in bytes. */
1231 symbol_cache_byte_size (unsigned int size
)
1233 return (sizeof (struct block_symbol_cache
)
1234 + ((size
- 1) * sizeof (struct symbol_cache_slot
)));
1240 resize_symbol_cache (struct symbol_cache
*cache
, unsigned int new_size
)
1242 /* If there's no change in size, don't do anything.
1243 All caches have the same size, so we can just compare with the size
1244 of the global symbols cache. */
1245 if ((cache
->global_symbols
!= NULL
1246 && cache
->global_symbols
->size
== new_size
)
1247 || (cache
->global_symbols
== NULL
1251 xfree (cache
->global_symbols
);
1252 xfree (cache
->static_symbols
);
1256 cache
->global_symbols
= NULL
;
1257 cache
->static_symbols
= NULL
;
1261 size_t total_size
= symbol_cache_byte_size (new_size
);
1263 cache
->global_symbols
= xcalloc (1, total_size
);
1264 cache
->static_symbols
= xcalloc (1, total_size
);
1265 cache
->global_symbols
->size
= new_size
;
1266 cache
->static_symbols
->size
= new_size
;
1270 /* Make a symbol cache of size SIZE. */
1272 static struct symbol_cache
*
1273 make_symbol_cache (unsigned int size
)
1275 struct symbol_cache
*cache
;
1277 cache
= XCNEW (struct symbol_cache
);
1278 resize_symbol_cache (cache
, symbol_cache_size
);
1282 /* Free the space used by CACHE. */
1285 free_symbol_cache (struct symbol_cache
*cache
)
1287 xfree (cache
->global_symbols
);
1288 xfree (cache
->static_symbols
);
1292 /* Return the symbol cache of PSPACE.
1293 Create one if it doesn't exist yet. */
1295 static struct symbol_cache
*
1296 get_symbol_cache (struct program_space
*pspace
)
1298 struct symbol_cache
*cache
= program_space_data (pspace
, symbol_cache_key
);
1302 cache
= make_symbol_cache (symbol_cache_size
);
1303 set_program_space_data (pspace
, symbol_cache_key
, cache
);
1309 /* Delete the symbol cache of PSPACE.
1310 Called when PSPACE is destroyed. */
1313 symbol_cache_cleanup (struct program_space
*pspace
, void *data
)
1315 struct symbol_cache
*cache
= data
;
1317 free_symbol_cache (cache
);
1320 /* Set the size of the symbol cache in all program spaces. */
1323 set_symbol_cache_size (unsigned int new_size
)
1325 struct program_space
*pspace
;
1327 ALL_PSPACES (pspace
)
1329 struct symbol_cache
*cache
1330 = program_space_data (pspace
, symbol_cache_key
);
1332 /* The pspace could have been created but not have a cache yet. */
1334 resize_symbol_cache (cache
, new_size
);
1338 /* Called when symbol-cache-size is set. */
1341 set_symbol_cache_size_handler (char *args
, int from_tty
,
1342 struct cmd_list_element
*c
)
1344 if (new_symbol_cache_size
> MAX_SYMBOL_CACHE_SIZE
)
1346 /* Restore the previous value.
1347 This is the value the "show" command prints. */
1348 new_symbol_cache_size
= symbol_cache_size
;
1350 error (_("Symbol cache size is too large, max is %u."),
1351 MAX_SYMBOL_CACHE_SIZE
);
1353 symbol_cache_size
= new_symbol_cache_size
;
1355 set_symbol_cache_size (symbol_cache_size
);
1358 /* Lookup symbol NAME,DOMAIN in BLOCK in the symbol cache of PSPACE.
1359 OBJFILE_CONTEXT is the current objfile, which may be NULL.
1360 The result is the symbol if found, SYMBOL_LOOKUP_FAILED if a previous lookup
1361 failed (and thus this one will too), or NULL if the symbol is not present
1363 *BSC_PTR, *SLOT_PTR are set to the cache and slot of the symbol, whether
1364 found or not found. */
1366 static struct symbol
*
1367 symbol_cache_lookup (struct symbol_cache
*cache
,
1368 struct objfile
*objfile_context
, int block
,
1369 const char *name
, domain_enum domain
,
1370 struct block_symbol_cache
**bsc_ptr
,
1371 struct symbol_cache_slot
**slot_ptr
)
1373 struct block_symbol_cache
*bsc
;
1375 struct symbol_cache_slot
*slot
;
1377 if (block
== GLOBAL_BLOCK
)
1378 bsc
= cache
->global_symbols
;
1380 bsc
= cache
->static_symbols
;
1388 hash
= hash_symbol_entry (objfile_context
, name
, domain
);
1389 slot
= bsc
->symbols
+ hash
% bsc
->size
;
1393 if (eq_symbol_entry (slot
, objfile_context
, name
, domain
))
1395 if (symbol_lookup_debug
)
1396 fprintf_unfiltered (gdb_stdlog
,
1397 "%s block symbol cache hit%s for %s, %s\n",
1398 block
== GLOBAL_BLOCK
? "Global" : "Static",
1399 slot
->state
== SYMBOL_SLOT_NOT_FOUND
1400 ? " (not found)" : "",
1401 name
, domain_name (domain
));
1403 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1404 return SYMBOL_LOOKUP_FAILED
;
1405 return slot
->value
.found
;
1408 if (symbol_lookup_debug
)
1410 fprintf_unfiltered (gdb_stdlog
,
1411 "%s block symbol cache miss for %s, %s\n",
1412 block
== GLOBAL_BLOCK
? "Global" : "Static",
1413 name
, domain_name (domain
));
1419 /* Clear out SLOT. */
1422 symbol_cache_clear_slot (struct symbol_cache_slot
*slot
)
1424 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1425 xfree (slot
->value
.not_found
.name
);
1426 slot
->state
= SYMBOL_SLOT_UNUSED
;
1429 /* Mark SYMBOL as found in SLOT.
1430 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1431 if it's not needed to distinguish lookups (STATIC_BLOCK). It is *not*
1432 necessarily the objfile the symbol was found in. */
1435 symbol_cache_mark_found (struct block_symbol_cache
*bsc
,
1436 struct symbol_cache_slot
*slot
,
1437 struct objfile
*objfile_context
,
1438 struct symbol
*symbol
)
1442 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1445 symbol_cache_clear_slot (slot
);
1447 slot
->state
= SYMBOL_SLOT_FOUND
;
1448 slot
->objfile_context
= objfile_context
;
1449 slot
->value
.found
= symbol
;
1452 /* Mark symbol NAME, DOMAIN as not found in SLOT.
1453 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1454 if it's not needed to distinguish lookups (STATIC_BLOCK). */
1457 symbol_cache_mark_not_found (struct block_symbol_cache
*bsc
,
1458 struct symbol_cache_slot
*slot
,
1459 struct objfile
*objfile_context
,
1460 const char *name
, domain_enum domain
)
1464 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1467 symbol_cache_clear_slot (slot
);
1469 slot
->state
= SYMBOL_SLOT_NOT_FOUND
;
1470 slot
->objfile_context
= objfile_context
;
1471 slot
->value
.not_found
.name
= xstrdup (name
);
1472 slot
->value
.not_found
.domain
= domain
;
1475 /* Flush the symbol cache of PSPACE. */
1478 symbol_cache_flush (struct program_space
*pspace
)
1480 struct symbol_cache
*cache
= program_space_data (pspace
, symbol_cache_key
);
1486 if (cache
->global_symbols
== NULL
)
1488 gdb_assert (symbol_cache_size
== 0);
1489 gdb_assert (cache
->static_symbols
== NULL
);
1493 /* If the cache is untouched since the last flush, early exit.
1494 This is important for performance during the startup of a program linked
1495 with 100s (or 1000s) of shared libraries. */
1496 if (cache
->global_symbols
->misses
== 0
1497 && cache
->static_symbols
->misses
== 0)
1500 gdb_assert (cache
->global_symbols
->size
== symbol_cache_size
);
1501 gdb_assert (cache
->static_symbols
->size
== symbol_cache_size
);
1503 for (pass
= 0; pass
< 2; ++pass
)
1505 struct block_symbol_cache
*bsc
1506 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1509 for (i
= 0; i
< bsc
->size
; ++i
)
1510 symbol_cache_clear_slot (&bsc
->symbols
[i
]);
1513 cache
->global_symbols
->hits
= 0;
1514 cache
->global_symbols
->misses
= 0;
1515 cache
->global_symbols
->collisions
= 0;
1516 cache
->static_symbols
->hits
= 0;
1517 cache
->static_symbols
->misses
= 0;
1518 cache
->static_symbols
->collisions
= 0;
1524 symbol_cache_dump (const struct symbol_cache
*cache
)
1528 if (cache
->global_symbols
== NULL
)
1530 printf_filtered (" <disabled>\n");
1534 for (pass
= 0; pass
< 2; ++pass
)
1536 const struct block_symbol_cache
*bsc
1537 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1541 printf_filtered ("Global symbols:\n");
1543 printf_filtered ("Static symbols:\n");
1545 for (i
= 0; i
< bsc
->size
; ++i
)
1547 const struct symbol_cache_slot
*slot
= &bsc
->symbols
[i
];
1551 switch (slot
->state
)
1553 case SYMBOL_SLOT_UNUSED
:
1555 case SYMBOL_SLOT_NOT_FOUND
:
1556 printf_filtered (" [%-4u] = %s, %s (not found)\n", i
,
1557 host_address_to_string (slot
->objfile_context
),
1558 slot
->value
.not_found
.name
);
1560 case SYMBOL_SLOT_FOUND
:
1561 printf_filtered (" [%-4u] = %s, %s\n", i
,
1562 host_address_to_string (slot
->objfile_context
),
1563 SYMBOL_PRINT_NAME (slot
->value
.found
));
1570 /* The "mt print symbol-cache" command. */
1573 maintenance_print_symbol_cache (char *args
, int from_tty
)
1575 struct program_space
*pspace
;
1577 ALL_PSPACES (pspace
)
1579 struct symbol_cache
*cache
;
1581 printf_filtered (_("Symbol cache for pspace %d\n%s:\n"),
1583 pspace
->symfile_object_file
!= NULL
1584 ? objfile_name (pspace
->symfile_object_file
)
1585 : "(no object file)");
1587 /* If the cache hasn't been created yet, avoid creating one. */
1588 cache
= program_space_data (pspace
, symbol_cache_key
);
1590 printf_filtered (" <empty>\n");
1592 symbol_cache_dump (cache
);
1596 /* The "mt flush-symbol-cache" command. */
1599 maintenance_flush_symbol_cache (char *args
, int from_tty
)
1601 struct program_space
*pspace
;
1603 ALL_PSPACES (pspace
)
1605 symbol_cache_flush (pspace
);
1609 /* Print usage statistics of CACHE. */
1612 symbol_cache_stats (struct symbol_cache
*cache
)
1616 if (cache
->global_symbols
== NULL
)
1618 printf_filtered (" <disabled>\n");
1622 for (pass
= 0; pass
< 2; ++pass
)
1624 const struct block_symbol_cache
*bsc
1625 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1630 printf_filtered ("Global block cache stats:\n");
1632 printf_filtered ("Static block cache stats:\n");
1634 printf_filtered (" size: %u\n", bsc
->size
);
1635 printf_filtered (" hits: %u\n", bsc
->hits
);
1636 printf_filtered (" misses: %u\n", bsc
->misses
);
1637 printf_filtered (" collisions: %u\n", bsc
->collisions
);
1641 /* The "mt print symbol-cache-statistics" command. */
1644 maintenance_print_symbol_cache_statistics (char *args
, int from_tty
)
1646 struct program_space
*pspace
;
1648 ALL_PSPACES (pspace
)
1650 struct symbol_cache
*cache
;
1652 printf_filtered (_("Symbol cache statistics for pspace %d\n%s:\n"),
1654 pspace
->symfile_object_file
!= NULL
1655 ? objfile_name (pspace
->symfile_object_file
)
1656 : "(no object file)");
1658 /* If the cache hasn't been created yet, avoid creating one. */
1659 cache
= program_space_data (pspace
, symbol_cache_key
);
1661 printf_filtered (" empty, no stats available\n");
1663 symbol_cache_stats (cache
);
1667 /* This module's 'new_objfile' observer. */
1670 symtab_new_objfile_observer (struct objfile
*objfile
)
1672 /* Ideally we'd use OBJFILE->pspace, but OBJFILE may be NULL. */
1673 symbol_cache_flush (current_program_space
);
1676 /* This module's 'free_objfile' observer. */
1679 symtab_free_objfile_observer (struct objfile
*objfile
)
1681 symbol_cache_flush (objfile
->pspace
);
1684 /* Debug symbols usually don't have section information. We need to dig that
1685 out of the minimal symbols and stash that in the debug symbol. */
1688 fixup_section (struct general_symbol_info
*ginfo
,
1689 CORE_ADDR addr
, struct objfile
*objfile
)
1691 struct minimal_symbol
*msym
;
1693 /* First, check whether a minimal symbol with the same name exists
1694 and points to the same address. The address check is required
1695 e.g. on PowerPC64, where the minimal symbol for a function will
1696 point to the function descriptor, while the debug symbol will
1697 point to the actual function code. */
1698 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1700 ginfo
->section
= MSYMBOL_SECTION (msym
);
1703 /* Static, function-local variables do appear in the linker
1704 (minimal) symbols, but are frequently given names that won't
1705 be found via lookup_minimal_symbol(). E.g., it has been
1706 observed in frv-uclinux (ELF) executables that a static,
1707 function-local variable named "foo" might appear in the
1708 linker symbols as "foo.6" or "foo.3". Thus, there is no
1709 point in attempting to extend the lookup-by-name mechanism to
1710 handle this case due to the fact that there can be multiple
1713 So, instead, search the section table when lookup by name has
1714 failed. The ``addr'' and ``endaddr'' fields may have already
1715 been relocated. If so, the relocation offset (i.e. the
1716 ANOFFSET value) needs to be subtracted from these values when
1717 performing the comparison. We unconditionally subtract it,
1718 because, when no relocation has been performed, the ANOFFSET
1719 value will simply be zero.
1721 The address of the symbol whose section we're fixing up HAS
1722 NOT BEEN adjusted (relocated) yet. It can't have been since
1723 the section isn't yet known and knowing the section is
1724 necessary in order to add the correct relocation value. In
1725 other words, we wouldn't even be in this function (attempting
1726 to compute the section) if it were already known.
1728 Note that it is possible to search the minimal symbols
1729 (subtracting the relocation value if necessary) to find the
1730 matching minimal symbol, but this is overkill and much less
1731 efficient. It is not necessary to find the matching minimal
1732 symbol, only its section.
1734 Note that this technique (of doing a section table search)
1735 can fail when unrelocated section addresses overlap. For
1736 this reason, we still attempt a lookup by name prior to doing
1737 a search of the section table. */
1739 struct obj_section
*s
;
1742 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1744 int idx
= s
- objfile
->sections
;
1745 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1750 if (obj_section_addr (s
) - offset
<= addr
1751 && addr
< obj_section_endaddr (s
) - offset
)
1753 ginfo
->section
= idx
;
1758 /* If we didn't find the section, assume it is in the first
1759 section. If there is no allocated section, then it hardly
1760 matters what we pick, so just pick zero. */
1764 ginfo
->section
= fallback
;
1769 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1776 if (!SYMBOL_OBJFILE_OWNED (sym
))
1779 /* We either have an OBJFILE, or we can get at it from the sym's
1780 symtab. Anything else is a bug. */
1781 gdb_assert (objfile
|| symbol_symtab (sym
));
1783 if (objfile
== NULL
)
1784 objfile
= symbol_objfile (sym
);
1786 if (SYMBOL_OBJ_SECTION (objfile
, sym
))
1789 /* We should have an objfile by now. */
1790 gdb_assert (objfile
);
1792 switch (SYMBOL_CLASS (sym
))
1796 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1799 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1803 /* Nothing else will be listed in the minsyms -- no use looking
1808 fixup_section (&sym
->ginfo
, addr
, objfile
);
1813 /* Compute the demangled form of NAME as used by the various symbol
1814 lookup functions. The result is stored in *RESULT_NAME. Returns a
1815 cleanup which can be used to clean up the result.
1817 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1818 Normally, Ada symbol lookups are performed using the encoded name
1819 rather than the demangled name, and so it might seem to make sense
1820 for this function to return an encoded version of NAME.
1821 Unfortunately, we cannot do this, because this function is used in
1822 circumstances where it is not appropriate to try to encode NAME.
1823 For instance, when displaying the frame info, we demangle the name
1824 of each parameter, and then perform a symbol lookup inside our
1825 function using that demangled name. In Ada, certain functions
1826 have internally-generated parameters whose name contain uppercase
1827 characters. Encoding those name would result in those uppercase
1828 characters to become lowercase, and thus cause the symbol lookup
1832 demangle_for_lookup (const char *name
, enum language lang
,
1833 const char **result_name
)
1835 char *demangled_name
= NULL
;
1836 const char *modified_name
= NULL
;
1837 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1839 modified_name
= name
;
1841 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1842 lookup, so we can always binary search. */
1843 if (lang
== language_cplus
)
1845 demangled_name
= gdb_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1848 modified_name
= demangled_name
;
1849 make_cleanup (xfree
, demangled_name
);
1853 /* If we were given a non-mangled name, canonicalize it
1854 according to the language (so far only for C++). */
1855 demangled_name
= cp_canonicalize_string (name
);
1858 modified_name
= demangled_name
;
1859 make_cleanup (xfree
, demangled_name
);
1863 else if (lang
== language_java
)
1865 demangled_name
= gdb_demangle (name
,
1866 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1869 modified_name
= demangled_name
;
1870 make_cleanup (xfree
, demangled_name
);
1873 else if (lang
== language_d
)
1875 demangled_name
= d_demangle (name
, 0);
1878 modified_name
= demangled_name
;
1879 make_cleanup (xfree
, demangled_name
);
1882 else if (lang
== language_go
)
1884 demangled_name
= go_demangle (name
, 0);
1887 modified_name
= demangled_name
;
1888 make_cleanup (xfree
, demangled_name
);
1892 *result_name
= modified_name
;
1898 This function (or rather its subordinates) have a bunch of loops and
1899 it would seem to be attractive to put in some QUIT's (though I'm not really
1900 sure whether it can run long enough to be really important). But there
1901 are a few calls for which it would appear to be bad news to quit
1902 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1903 that there is C++ code below which can error(), but that probably
1904 doesn't affect these calls since they are looking for a known
1905 variable and thus can probably assume it will never hit the C++
1909 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1910 const domain_enum domain
, enum language lang
,
1911 struct field_of_this_result
*is_a_field_of_this
)
1913 const char *modified_name
;
1914 struct symbol
*returnval
;
1915 struct cleanup
*cleanup
= demangle_for_lookup (name
, lang
, &modified_name
);
1917 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1918 is_a_field_of_this
);
1919 do_cleanups (cleanup
);
1927 lookup_symbol (const char *name
, const struct block
*block
,
1929 struct field_of_this_result
*is_a_field_of_this
)
1931 return lookup_symbol_in_language (name
, block
, domain
,
1932 current_language
->la_language
,
1933 is_a_field_of_this
);
1939 lookup_language_this (const struct language_defn
*lang
,
1940 const struct block
*block
)
1942 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1945 if (symbol_lookup_debug
> 1)
1947 struct objfile
*objfile
= lookup_objfile_from_block (block
);
1949 fprintf_unfiltered (gdb_stdlog
,
1950 "lookup_language_this (%s, %s (objfile %s))",
1951 lang
->la_name
, host_address_to_string (block
),
1952 objfile_debug_name (objfile
));
1959 sym
= block_lookup_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
1962 if (symbol_lookup_debug
> 1)
1964 fprintf_unfiltered (gdb_stdlog
, " = %s (%s, block %s)\n",
1965 SYMBOL_PRINT_NAME (sym
),
1966 host_address_to_string (sym
),
1967 host_address_to_string (block
));
1969 block_found
= block
;
1972 if (BLOCK_FUNCTION (block
))
1974 block
= BLOCK_SUPERBLOCK (block
);
1977 if (symbol_lookup_debug
> 1)
1978 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
1982 /* Given TYPE, a structure/union,
1983 return 1 if the component named NAME from the ultimate target
1984 structure/union is defined, otherwise, return 0. */
1987 check_field (struct type
*type
, const char *name
,
1988 struct field_of_this_result
*is_a_field_of_this
)
1992 /* The type may be a stub. */
1993 CHECK_TYPEDEF (type
);
1995 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
1997 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
1999 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
2001 is_a_field_of_this
->type
= type
;
2002 is_a_field_of_this
->field
= &TYPE_FIELD (type
, i
);
2007 /* C++: If it was not found as a data field, then try to return it
2008 as a pointer to a method. */
2010 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
2012 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type
, i
), name
) == 0)
2014 is_a_field_of_this
->type
= type
;
2015 is_a_field_of_this
->fn_field
= &TYPE_FN_FIELDLIST (type
, i
);
2020 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
2021 if (check_field (TYPE_BASECLASS (type
, i
), name
, is_a_field_of_this
))
2027 /* Behave like lookup_symbol except that NAME is the natural name
2028 (e.g., demangled name) of the symbol that we're looking for. */
2030 static struct symbol
*
2031 lookup_symbol_aux (const char *name
, const struct block
*block
,
2032 const domain_enum domain
, enum language language
,
2033 struct field_of_this_result
*is_a_field_of_this
)
2036 const struct language_defn
*langdef
;
2038 if (symbol_lookup_debug
)
2040 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2042 fprintf_unfiltered (gdb_stdlog
,
2043 "lookup_symbol_aux (%s, %s (objfile %s), %s, %s)\n",
2044 name
, host_address_to_string (block
),
2046 ? objfile_debug_name (objfile
) : "NULL",
2047 domain_name (domain
), language_str (language
));
2050 /* Initialize block_found so that the language la_lookup_symbol_nonlocal
2051 routines don't have to set it (to NULL) if a primitive type is found.
2052 We do this early so that block_found is also NULL if no symbol is
2053 found (though this is not part of the API, and callers cannot assume
2057 /* Make sure we do something sensible with is_a_field_of_this, since
2058 the callers that set this parameter to some non-null value will
2059 certainly use it later. If we don't set it, the contents of
2060 is_a_field_of_this are undefined. */
2061 if (is_a_field_of_this
!= NULL
)
2062 memset (is_a_field_of_this
, 0, sizeof (*is_a_field_of_this
));
2064 /* Search specified block and its superiors. Don't search
2065 STATIC_BLOCK or GLOBAL_BLOCK. */
2067 sym
= lookup_local_symbol (name
, block
, domain
, language
);
2070 if (symbol_lookup_debug
)
2072 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2073 host_address_to_string (sym
));
2078 /* If requested to do so by the caller and if appropriate for LANGUAGE,
2079 check to see if NAME is a field of `this'. */
2081 langdef
= language_def (language
);
2083 /* Don't do this check if we are searching for a struct. It will
2084 not be found by check_field, but will be found by other
2086 if (is_a_field_of_this
!= NULL
&& domain
!= STRUCT_DOMAIN
)
2088 struct symbol
*sym
= lookup_language_this (langdef
, block
);
2092 struct type
*t
= sym
->type
;
2094 /* I'm not really sure that type of this can ever
2095 be typedefed; just be safe. */
2097 if (TYPE_CODE (t
) == TYPE_CODE_PTR
2098 || TYPE_CODE (t
) == TYPE_CODE_REF
)
2099 t
= TYPE_TARGET_TYPE (t
);
2101 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
2102 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
2103 error (_("Internal error: `%s' is not an aggregate"),
2104 langdef
->la_name_of_this
);
2106 if (check_field (t
, name
, is_a_field_of_this
))
2108 if (symbol_lookup_debug
)
2110 fprintf_unfiltered (gdb_stdlog
,
2111 "lookup_symbol_aux (...) = NULL\n");
2118 /* Now do whatever is appropriate for LANGUAGE to look
2119 up static and global variables. */
2121 sym
= langdef
->la_lookup_symbol_nonlocal (langdef
, name
, block
, domain
);
2124 if (symbol_lookup_debug
)
2126 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2127 host_address_to_string (sym
));
2132 /* Now search all static file-level symbols. Not strictly correct,
2133 but more useful than an error. */
2135 sym
= lookup_static_symbol (name
, domain
);
2136 if (symbol_lookup_debug
)
2138 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2139 sym
!= NULL
? host_address_to_string (sym
) : "NULL");
2144 /* Check to see if the symbol is defined in BLOCK or its superiors.
2145 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
2147 static struct symbol
*
2148 lookup_local_symbol (const char *name
, const struct block
*block
,
2149 const domain_enum domain
,
2150 enum language language
)
2153 const struct block
*static_block
= block_static_block (block
);
2154 const char *scope
= block_scope (block
);
2156 /* Check if either no block is specified or it's a global block. */
2158 if (static_block
== NULL
)
2161 while (block
!= static_block
)
2163 sym
= lookup_symbol_in_block (name
, block
, domain
);
2167 if (language
== language_cplus
|| language
== language_fortran
)
2169 sym
= cp_lookup_symbol_imports_or_template (scope
, name
, block
,
2175 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
2177 block
= BLOCK_SUPERBLOCK (block
);
2180 /* We've reached the end of the function without finding a result. */
2188 lookup_objfile_from_block (const struct block
*block
)
2190 struct objfile
*obj
;
2191 struct compunit_symtab
*cust
;
2196 block
= block_global_block (block
);
2197 /* Look through all blockvectors. */
2198 ALL_COMPUNITS (obj
, cust
)
2199 if (block
== BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
),
2202 if (obj
->separate_debug_objfile_backlink
)
2203 obj
= obj
->separate_debug_objfile_backlink
;
2214 lookup_symbol_in_block (const char *name
, const struct block
*block
,
2215 const domain_enum domain
)
2219 if (symbol_lookup_debug
> 1)
2221 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2223 fprintf_unfiltered (gdb_stdlog
,
2224 "lookup_symbol_in_block (%s, %s (objfile %s), %s)",
2225 name
, host_address_to_string (block
),
2226 objfile_debug_name (objfile
),
2227 domain_name (domain
));
2230 sym
= block_lookup_symbol (block
, name
, domain
);
2233 if (symbol_lookup_debug
> 1)
2235 fprintf_unfiltered (gdb_stdlog
, " = %s\n",
2236 host_address_to_string (sym
));
2238 block_found
= block
;
2239 return fixup_symbol_section (sym
, NULL
);
2242 if (symbol_lookup_debug
> 1)
2243 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2250 lookup_global_symbol_from_objfile (struct objfile
*main_objfile
,
2252 const domain_enum domain
)
2254 struct objfile
*objfile
;
2256 for (objfile
= main_objfile
;
2258 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
2260 struct symbol
*sym
= lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
,
2270 /* Check to see if the symbol is defined in one of the OBJFILE's
2271 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
2272 depending on whether or not we want to search global symbols or
2275 static struct symbol
*
2276 lookup_symbol_in_objfile_symtabs (struct objfile
*objfile
, int block_index
,
2277 const char *name
, const domain_enum domain
)
2279 struct compunit_symtab
*cust
;
2281 gdb_assert (block_index
== GLOBAL_BLOCK
|| block_index
== STATIC_BLOCK
);
2283 if (symbol_lookup_debug
> 1)
2285 fprintf_unfiltered (gdb_stdlog
,
2286 "lookup_symbol_in_objfile_symtabs (%s, %s, %s, %s)",
2287 objfile_debug_name (objfile
),
2288 block_index
== GLOBAL_BLOCK
2289 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2290 name
, domain_name (domain
));
2293 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2295 const struct blockvector
*bv
;
2296 const struct block
*block
;
2299 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2300 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2301 sym
= block_lookup_symbol_primary (block
, name
, domain
);
2304 if (symbol_lookup_debug
> 1)
2306 fprintf_unfiltered (gdb_stdlog
, " = %s (block %s)\n",
2307 host_address_to_string (sym
),
2308 host_address_to_string (block
));
2310 block_found
= block
;
2311 return fixup_symbol_section (sym
, objfile
);
2315 if (symbol_lookup_debug
> 1)
2316 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2320 /* Wrapper around lookup_symbol_in_objfile_symtabs for search_symbols.
2321 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
2322 and all associated separate debug objfiles.
2324 Normally we only look in OBJFILE, and not any separate debug objfiles
2325 because the outer loop will cause them to be searched too. This case is
2326 different. Here we're called from search_symbols where it will only
2327 call us for the the objfile that contains a matching minsym. */
2329 static struct symbol
*
2330 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
2331 const char *linkage_name
,
2334 enum language lang
= current_language
->la_language
;
2335 const char *modified_name
;
2336 struct cleanup
*cleanup
= demangle_for_lookup (linkage_name
, lang
,
2338 struct objfile
*main_objfile
, *cur_objfile
;
2340 if (objfile
->separate_debug_objfile_backlink
)
2341 main_objfile
= objfile
->separate_debug_objfile_backlink
;
2343 main_objfile
= objfile
;
2345 for (cur_objfile
= main_objfile
;
2347 cur_objfile
= objfile_separate_debug_iterate (main_objfile
, cur_objfile
))
2351 sym
= lookup_symbol_in_objfile_symtabs (cur_objfile
, GLOBAL_BLOCK
,
2352 modified_name
, domain
);
2354 sym
= lookup_symbol_in_objfile_symtabs (cur_objfile
, STATIC_BLOCK
,
2355 modified_name
, domain
);
2358 do_cleanups (cleanup
);
2363 do_cleanups (cleanup
);
2367 /* A helper function that throws an exception when a symbol was found
2368 in a psymtab but not in a symtab. */
2370 static void ATTRIBUTE_NORETURN
2371 error_in_psymtab_expansion (int block_index
, const char *name
,
2372 struct compunit_symtab
*cust
)
2375 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
2376 %s may be an inlined function, or may be a template function\n \
2377 (if a template, try specifying an instantiation: %s<type>)."),
2378 block_index
== GLOBAL_BLOCK
? "global" : "static",
2380 symtab_to_filename_for_display (compunit_primary_filetab (cust
)),
2384 /* A helper function for various lookup routines that interfaces with
2385 the "quick" symbol table functions. */
2387 static struct symbol
*
2388 lookup_symbol_via_quick_fns (struct objfile
*objfile
, int block_index
,
2389 const char *name
, const domain_enum domain
)
2391 struct compunit_symtab
*cust
;
2392 const struct blockvector
*bv
;
2393 const struct block
*block
;
2399 if (symbol_lookup_debug
> 1)
2401 fprintf_unfiltered (gdb_stdlog
,
2402 "lookup_symbol_via_quick_fns (%s, %s, %s, %s)\n",
2403 objfile_debug_name (objfile
),
2404 block_index
== GLOBAL_BLOCK
2405 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2406 name
, domain_name (domain
));
2409 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
, domain
);
2412 if (symbol_lookup_debug
> 1)
2414 fprintf_unfiltered (gdb_stdlog
,
2415 "lookup_symbol_via_quick_fns (...) = NULL\n");
2420 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2421 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2422 sym
= block_lookup_symbol (block
, name
, domain
);
2424 error_in_psymtab_expansion (block_index
, name
, cust
);
2426 if (symbol_lookup_debug
> 1)
2428 fprintf_unfiltered (gdb_stdlog
,
2429 "lookup_symbol_via_quick_fns (...) = %s (block %s)\n",
2430 host_address_to_string (sym
),
2431 host_address_to_string (block
));
2434 block_found
= block
;
2435 return fixup_symbol_section (sym
, objfile
);
2441 basic_lookup_symbol_nonlocal (const struct language_defn
*langdef
,
2443 const struct block
*block
,
2444 const domain_enum domain
)
2448 /* NOTE: carlton/2003-05-19: The comments below were written when
2449 this (or what turned into this) was part of lookup_symbol_aux;
2450 I'm much less worried about these questions now, since these
2451 decisions have turned out well, but I leave these comments here
2454 /* NOTE: carlton/2002-12-05: There is a question as to whether or
2455 not it would be appropriate to search the current global block
2456 here as well. (That's what this code used to do before the
2457 is_a_field_of_this check was moved up.) On the one hand, it's
2458 redundant with the lookup in all objfiles search that happens
2459 next. On the other hand, if decode_line_1 is passed an argument
2460 like filename:var, then the user presumably wants 'var' to be
2461 searched for in filename. On the third hand, there shouldn't be
2462 multiple global variables all of which are named 'var', and it's
2463 not like decode_line_1 has ever restricted its search to only
2464 global variables in a single filename. All in all, only
2465 searching the static block here seems best: it's correct and it's
2468 /* NOTE: carlton/2002-12-05: There's also a possible performance
2469 issue here: if you usually search for global symbols in the
2470 current file, then it would be slightly better to search the
2471 current global block before searching all the symtabs. But there
2472 are other factors that have a much greater effect on performance
2473 than that one, so I don't think we should worry about that for
2476 /* NOTE: dje/2014-10-26: The lookup in all objfiles search could skip
2477 the current objfile. Searching the current objfile first is useful
2478 for both matching user expectations as well as performance. */
2480 sym
= lookup_symbol_in_static_block (name
, block
, domain
);
2484 /* If we didn't find a definition for a builtin type in the static block,
2485 search for it now. This is actually the right thing to do and can be
2486 a massive performance win. E.g., when debugging a program with lots of
2487 shared libraries we could search all of them only to find out the
2488 builtin type isn't defined in any of them. This is common for types
2490 if (domain
== VAR_DOMAIN
)
2492 struct gdbarch
*gdbarch
;
2495 gdbarch
= target_gdbarch ();
2497 gdbarch
= block_gdbarch (block
);
2498 sym
= language_lookup_primitive_type_as_symbol (langdef
, gdbarch
, name
);
2503 return lookup_global_symbol (name
, block
, domain
);
2509 lookup_symbol_in_static_block (const char *name
,
2510 const struct block
*block
,
2511 const domain_enum domain
)
2513 const struct block
*static_block
= block_static_block (block
);
2516 if (static_block
== NULL
)
2519 if (symbol_lookup_debug
)
2521 struct objfile
*objfile
= lookup_objfile_from_block (static_block
);
2523 fprintf_unfiltered (gdb_stdlog
,
2524 "lookup_symbol_in_static_block (%s, %s (objfile %s),"
2527 host_address_to_string (block
),
2528 objfile_debug_name (objfile
),
2529 domain_name (domain
));
2532 sym
= lookup_symbol_in_block (name
, static_block
, domain
);
2533 if (symbol_lookup_debug
)
2535 fprintf_unfiltered (gdb_stdlog
,
2536 "lookup_symbol_in_static_block (...) = %s\n",
2537 sym
!= NULL
? host_address_to_string (sym
) : "NULL");
2542 /* Perform the standard symbol lookup of NAME in OBJFILE:
2543 1) First search expanded symtabs, and if not found
2544 2) Search the "quick" symtabs (partial or .gdb_index).
2545 BLOCK_INDEX is one of GLOBAL_BLOCK or STATIC_BLOCK. */
2547 static struct symbol
*
2548 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
2549 const char *name
, const domain_enum domain
)
2551 struct symbol
*result
;
2553 if (symbol_lookup_debug
)
2555 fprintf_unfiltered (gdb_stdlog
,
2556 "lookup_symbol_in_objfile (%s, %s, %s, %s)\n",
2557 objfile_debug_name (objfile
),
2558 block_index
== GLOBAL_BLOCK
2559 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2560 name
, domain_name (domain
));
2563 result
= lookup_symbol_in_objfile_symtabs (objfile
, block_index
,
2567 if (symbol_lookup_debug
)
2569 fprintf_unfiltered (gdb_stdlog
,
2570 "lookup_symbol_in_objfile (...) = %s"
2572 host_address_to_string (result
));
2577 result
= lookup_symbol_via_quick_fns (objfile
, block_index
,
2579 if (symbol_lookup_debug
)
2581 fprintf_unfiltered (gdb_stdlog
,
2582 "lookup_symbol_in_objfile (...) = %s%s\n",
2584 ? host_address_to_string (result
)
2586 result
!= NULL
? " (via quick fns)" : "");
2594 lookup_static_symbol (const char *name
, const domain_enum domain
)
2596 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2597 struct objfile
*objfile
;
2598 struct symbol
*result
;
2599 struct block_symbol_cache
*bsc
;
2600 struct symbol_cache_slot
*slot
;
2602 /* Lookup in STATIC_BLOCK is not current-objfile-dependent, so just pass
2603 NULL for OBJFILE_CONTEXT. */
2604 result
= symbol_cache_lookup (cache
, NULL
, STATIC_BLOCK
, name
, domain
,
2608 if (result
== SYMBOL_LOOKUP_FAILED
)
2613 ALL_OBJFILES (objfile
)
2615 result
= lookup_symbol_in_objfile (objfile
, STATIC_BLOCK
, name
, domain
);
2618 /* Still pass NULL for OBJFILE_CONTEXT here. */
2619 symbol_cache_mark_found (bsc
, slot
, NULL
, result
);
2624 /* Still pass NULL for OBJFILE_CONTEXT here. */
2625 symbol_cache_mark_not_found (bsc
, slot
, NULL
, name
, domain
);
2629 /* Private data to be used with lookup_symbol_global_iterator_cb. */
2631 struct global_sym_lookup_data
2633 /* The name of the symbol we are searching for. */
2636 /* The domain to use for our search. */
2639 /* The field where the callback should store the symbol if found.
2640 It should be initialized to NULL before the search is started. */
2641 struct symbol
*result
;
2644 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
2645 It searches by name for a symbol in the GLOBAL_BLOCK of the given
2646 OBJFILE. The arguments for the search are passed via CB_DATA,
2647 which in reality is a pointer to struct global_sym_lookup_data. */
2650 lookup_symbol_global_iterator_cb (struct objfile
*objfile
,
2653 struct global_sym_lookup_data
*data
=
2654 (struct global_sym_lookup_data
*) cb_data
;
2656 gdb_assert (data
->result
== NULL
);
2658 data
->result
= lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
,
2659 data
->name
, data
->domain
);
2661 /* If we found a match, tell the iterator to stop. Otherwise,
2663 return (data
->result
!= NULL
);
2669 lookup_global_symbol (const char *name
,
2670 const struct block
*block
,
2671 const domain_enum domain
)
2673 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2675 struct objfile
*objfile
;
2676 struct global_sym_lookup_data lookup_data
;
2677 struct block_symbol_cache
*bsc
;
2678 struct symbol_cache_slot
*slot
;
2680 objfile
= lookup_objfile_from_block (block
);
2682 /* First see if we can find the symbol in the cache.
2683 This works because we use the current objfile to qualify the lookup. */
2684 sym
= symbol_cache_lookup (cache
, objfile
, GLOBAL_BLOCK
, name
, domain
,
2688 if (sym
== SYMBOL_LOOKUP_FAILED
)
2693 /* Call library-specific lookup procedure. */
2694 if (objfile
!= NULL
)
2695 sym
= solib_global_lookup (objfile
, name
, domain
);
2697 /* If that didn't work go a global search (of global blocks, heh). */
2700 memset (&lookup_data
, 0, sizeof (lookup_data
));
2701 lookup_data
.name
= name
;
2702 lookup_data
.domain
= domain
;
2703 gdbarch_iterate_over_objfiles_in_search_order
2704 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch (),
2705 lookup_symbol_global_iterator_cb
, &lookup_data
, objfile
);
2706 sym
= lookup_data
.result
;
2710 symbol_cache_mark_found (bsc
, slot
, objfile
, sym
);
2712 symbol_cache_mark_not_found (bsc
, slot
, objfile
, name
, domain
);
2718 symbol_matches_domain (enum language symbol_language
,
2719 domain_enum symbol_domain
,
2722 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
2723 A Java class declaration also defines a typedef for the class.
2724 Similarly, any Ada type declaration implicitly defines a typedef. */
2725 if (symbol_language
== language_cplus
2726 || symbol_language
== language_d
2727 || symbol_language
== language_java
2728 || symbol_language
== language_ada
)
2730 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
2731 && symbol_domain
== STRUCT_DOMAIN
)
2734 /* For all other languages, strict match is required. */
2735 return (symbol_domain
== domain
);
2741 lookup_transparent_type (const char *name
)
2743 return current_language
->la_lookup_transparent_type (name
);
2746 /* A helper for basic_lookup_transparent_type that interfaces with the
2747 "quick" symbol table functions. */
2749 static struct type
*
2750 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int block_index
,
2753 struct compunit_symtab
*cust
;
2754 const struct blockvector
*bv
;
2755 struct block
*block
;
2760 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
,
2765 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2766 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2767 sym
= block_lookup_symbol (block
, name
, STRUCT_DOMAIN
);
2769 error_in_psymtab_expansion (block_index
, name
, cust
);
2771 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
2772 return SYMBOL_TYPE (sym
);
2777 /* The standard implementation of lookup_transparent_type. This code
2778 was modeled on lookup_symbol -- the parts not relevant to looking
2779 up types were just left out. In particular it's assumed here that
2780 types are available in STRUCT_DOMAIN and only in file-static or
2784 basic_lookup_transparent_type (const char *name
)
2787 struct compunit_symtab
*cust
;
2788 const struct blockvector
*bv
;
2789 struct objfile
*objfile
;
2790 struct block
*block
;
2793 /* Now search all the global symbols. Do the symtab's first, then
2794 check the psymtab's. If a psymtab indicates the existence
2795 of the desired name as a global, then do psymtab-to-symtab
2796 conversion on the fly and return the found symbol. */
2798 ALL_OBJFILES (objfile
)
2800 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2802 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2803 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2804 sym
= block_lookup_symbol (block
, name
, STRUCT_DOMAIN
);
2805 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
2807 return SYMBOL_TYPE (sym
);
2812 ALL_OBJFILES (objfile
)
2814 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
2819 /* Now search the static file-level symbols.
2820 Not strictly correct, but more useful than an error.
2821 Do the symtab's first, then
2822 check the psymtab's. If a psymtab indicates the existence
2823 of the desired name as a file-level static, then do psymtab-to-symtab
2824 conversion on the fly and return the found symbol. */
2826 ALL_OBJFILES (objfile
)
2828 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2830 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2831 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
2832 sym
= block_lookup_symbol (block
, name
, STRUCT_DOMAIN
);
2833 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
2835 return SYMBOL_TYPE (sym
);
2840 ALL_OBJFILES (objfile
)
2842 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
2847 return (struct type
*) 0;
2850 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2852 For each symbol that matches, CALLBACK is called. The symbol and
2853 DATA are passed to the callback.
2855 If CALLBACK returns zero, the iteration ends. Otherwise, the
2856 search continues. */
2859 iterate_over_symbols (const struct block
*block
, const char *name
,
2860 const domain_enum domain
,
2861 symbol_found_callback_ftype
*callback
,
2864 struct block_iterator iter
;
2867 ALL_BLOCK_SYMBOLS_WITH_NAME (block
, name
, iter
, sym
)
2869 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2870 SYMBOL_DOMAIN (sym
), domain
))
2872 if (!callback (sym
, data
))
2878 /* Find the compunit symtab associated with PC and SECTION.
2879 This will read in debug info as necessary. */
2881 struct compunit_symtab
*
2882 find_pc_sect_compunit_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2884 struct compunit_symtab
*cust
;
2885 struct compunit_symtab
*best_cust
= NULL
;
2886 struct objfile
*objfile
;
2887 CORE_ADDR distance
= 0;
2888 struct bound_minimal_symbol msymbol
;
2890 /* If we know that this is not a text address, return failure. This is
2891 necessary because we loop based on the block's high and low code
2892 addresses, which do not include the data ranges, and because
2893 we call find_pc_sect_psymtab which has a similar restriction based
2894 on the partial_symtab's texthigh and textlow. */
2895 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2897 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
2898 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
2899 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
2900 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
2901 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
2904 /* Search all symtabs for the one whose file contains our address, and which
2905 is the smallest of all the ones containing the address. This is designed
2906 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2907 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2908 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2910 This happens for native ecoff format, where code from included files
2911 gets its own symtab. The symtab for the included file should have
2912 been read in already via the dependency mechanism.
2913 It might be swifter to create several symtabs with the same name
2914 like xcoff does (I'm not sure).
2916 It also happens for objfiles that have their functions reordered.
2917 For these, the symtab we are looking for is not necessarily read in. */
2919 ALL_COMPUNITS (objfile
, cust
)
2922 const struct blockvector
*bv
;
2924 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2925 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2927 if (BLOCK_START (b
) <= pc
2928 && BLOCK_END (b
) > pc
2930 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2932 /* For an objfile that has its functions reordered,
2933 find_pc_psymtab will find the proper partial symbol table
2934 and we simply return its corresponding symtab. */
2935 /* In order to better support objfiles that contain both
2936 stabs and coff debugging info, we continue on if a psymtab
2938 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
2940 struct compunit_symtab
*result
;
2943 = objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
,
2952 struct block_iterator iter
;
2953 struct symbol
*sym
= NULL
;
2955 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2957 fixup_symbol_section (sym
, objfile
);
2958 if (matching_obj_sections (SYMBOL_OBJ_SECTION (objfile
, sym
),
2963 continue; /* No symbol in this symtab matches
2966 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2971 if (best_cust
!= NULL
)
2974 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
2976 ALL_OBJFILES (objfile
)
2978 struct compunit_symtab
*result
;
2982 result
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
,
2993 /* Find the compunit symtab associated with PC.
2994 This will read in debug info as necessary.
2995 Backward compatibility, no section. */
2997 struct compunit_symtab
*
2998 find_pc_compunit_symtab (CORE_ADDR pc
)
3000 return find_pc_sect_compunit_symtab (pc
, find_pc_mapped_section (pc
));
3004 /* Find the source file and line number for a given PC value and SECTION.
3005 Return a structure containing a symtab pointer, a line number,
3006 and a pc range for the entire source line.
3007 The value's .pc field is NOT the specified pc.
3008 NOTCURRENT nonzero means, if specified pc is on a line boundary,
3009 use the line that ends there. Otherwise, in that case, the line
3010 that begins there is used. */
3012 /* The big complication here is that a line may start in one file, and end just
3013 before the start of another file. This usually occurs when you #include
3014 code in the middle of a subroutine. To properly find the end of a line's PC
3015 range, we must search all symtabs associated with this compilation unit, and
3016 find the one whose first PC is closer than that of the next line in this
3019 /* If it's worth the effort, we could be using a binary search. */
3021 struct symtab_and_line
3022 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
3024 struct compunit_symtab
*cust
;
3025 struct symtab
*iter_s
;
3026 struct linetable
*l
;
3029 struct linetable_entry
*item
;
3030 struct symtab_and_line val
;
3031 const struct blockvector
*bv
;
3032 struct bound_minimal_symbol msymbol
;
3034 /* Info on best line seen so far, and where it starts, and its file. */
3036 struct linetable_entry
*best
= NULL
;
3037 CORE_ADDR best_end
= 0;
3038 struct symtab
*best_symtab
= 0;
3040 /* Store here the first line number
3041 of a file which contains the line at the smallest pc after PC.
3042 If we don't find a line whose range contains PC,
3043 we will use a line one less than this,
3044 with a range from the start of that file to the first line's pc. */
3045 struct linetable_entry
*alt
= NULL
;
3047 /* Info on best line seen in this file. */
3049 struct linetable_entry
*prev
;
3051 /* If this pc is not from the current frame,
3052 it is the address of the end of a call instruction.
3053 Quite likely that is the start of the following statement.
3054 But what we want is the statement containing the instruction.
3055 Fudge the pc to make sure we get that. */
3057 init_sal (&val
); /* initialize to zeroes */
3059 val
.pspace
= current_program_space
;
3061 /* It's tempting to assume that, if we can't find debugging info for
3062 any function enclosing PC, that we shouldn't search for line
3063 number info, either. However, GAS can emit line number info for
3064 assembly files --- very helpful when debugging hand-written
3065 assembly code. In such a case, we'd have no debug info for the
3066 function, but we would have line info. */
3071 /* elz: added this because this function returned the wrong
3072 information if the pc belongs to a stub (import/export)
3073 to call a shlib function. This stub would be anywhere between
3074 two functions in the target, and the line info was erroneously
3075 taken to be the one of the line before the pc. */
3077 /* RT: Further explanation:
3079 * We have stubs (trampolines) inserted between procedures.
3081 * Example: "shr1" exists in a shared library, and a "shr1" stub also
3082 * exists in the main image.
3084 * In the minimal symbol table, we have a bunch of symbols
3085 * sorted by start address. The stubs are marked as "trampoline",
3086 * the others appear as text. E.g.:
3088 * Minimal symbol table for main image
3089 * main: code for main (text symbol)
3090 * shr1: stub (trampoline symbol)
3091 * foo: code for foo (text symbol)
3093 * Minimal symbol table for "shr1" image:
3095 * shr1: code for shr1 (text symbol)
3098 * So the code below is trying to detect if we are in the stub
3099 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
3100 * and if found, do the symbolization from the real-code address
3101 * rather than the stub address.
3103 * Assumptions being made about the minimal symbol table:
3104 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
3105 * if we're really in the trampoline.s If we're beyond it (say
3106 * we're in "foo" in the above example), it'll have a closer
3107 * symbol (the "foo" text symbol for example) and will not
3108 * return the trampoline.
3109 * 2. lookup_minimal_symbol_text() will find a real text symbol
3110 * corresponding to the trampoline, and whose address will
3111 * be different than the trampoline address. I put in a sanity
3112 * check for the address being the same, to avoid an
3113 * infinite recursion.
3115 msymbol
= lookup_minimal_symbol_by_pc (pc
);
3116 if (msymbol
.minsym
!= NULL
)
3117 if (MSYMBOL_TYPE (msymbol
.minsym
) == mst_solib_trampoline
)
3119 struct bound_minimal_symbol mfunsym
3120 = lookup_minimal_symbol_text (MSYMBOL_LINKAGE_NAME (msymbol
.minsym
),
3123 if (mfunsym
.minsym
== NULL
)
3124 /* I eliminated this warning since it is coming out
3125 * in the following situation:
3126 * gdb shmain // test program with shared libraries
3127 * (gdb) break shr1 // function in shared lib
3128 * Warning: In stub for ...
3129 * In the above situation, the shared lib is not loaded yet,
3130 * so of course we can't find the real func/line info,
3131 * but the "break" still works, and the warning is annoying.
3132 * So I commented out the warning. RT */
3133 /* warning ("In stub for %s; unable to find real function/line info",
3134 SYMBOL_LINKAGE_NAME (msymbol)); */
3137 else if (BMSYMBOL_VALUE_ADDRESS (mfunsym
)
3138 == BMSYMBOL_VALUE_ADDRESS (msymbol
))
3139 /* Avoid infinite recursion */
3140 /* See above comment about why warning is commented out. */
3141 /* warning ("In stub for %s; unable to find real function/line info",
3142 SYMBOL_LINKAGE_NAME (msymbol)); */
3146 return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym
), 0);
3150 cust
= find_pc_sect_compunit_symtab (pc
, section
);
3153 /* If no symbol information, return previous pc. */
3160 bv
= COMPUNIT_BLOCKVECTOR (cust
);
3162 /* Look at all the symtabs that share this blockvector.
3163 They all have the same apriori range, that we found was right;
3164 but they have different line tables. */
3166 ALL_COMPUNIT_FILETABS (cust
, iter_s
)
3168 /* Find the best line in this symtab. */
3169 l
= SYMTAB_LINETABLE (iter_s
);
3175 /* I think len can be zero if the symtab lacks line numbers
3176 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
3177 I'm not sure which, and maybe it depends on the symbol
3183 item
= l
->item
; /* Get first line info. */
3185 /* Is this file's first line closer than the first lines of other files?
3186 If so, record this file, and its first line, as best alternate. */
3187 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
3190 for (i
= 0; i
< len
; i
++, item
++)
3192 /* Leave prev pointing to the linetable entry for the last line
3193 that started at or before PC. */
3200 /* At this point, prev points at the line whose start addr is <= pc, and
3201 item points at the next line. If we ran off the end of the linetable
3202 (pc >= start of the last line), then prev == item. If pc < start of
3203 the first line, prev will not be set. */
3205 /* Is this file's best line closer than the best in the other files?
3206 If so, record this file, and its best line, as best so far. Don't
3207 save prev if it represents the end of a function (i.e. line number
3208 0) instead of a real line. */
3210 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
3213 best_symtab
= iter_s
;
3215 /* Discard BEST_END if it's before the PC of the current BEST. */
3216 if (best_end
<= best
->pc
)
3220 /* If another line (denoted by ITEM) is in the linetable and its
3221 PC is after BEST's PC, but before the current BEST_END, then
3222 use ITEM's PC as the new best_end. */
3223 if (best
&& i
< len
&& item
->pc
> best
->pc
3224 && (best_end
== 0 || best_end
> item
->pc
))
3225 best_end
= item
->pc
;
3230 /* If we didn't find any line number info, just return zeros.
3231 We used to return alt->line - 1 here, but that could be
3232 anywhere; if we don't have line number info for this PC,
3233 don't make some up. */
3236 else if (best
->line
== 0)
3238 /* If our best fit is in a range of PC's for which no line
3239 number info is available (line number is zero) then we didn't
3240 find any valid line information. */
3245 val
.symtab
= best_symtab
;
3246 val
.line
= best
->line
;
3248 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
3253 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
3255 val
.section
= section
;
3259 /* Backward compatibility (no section). */
3261 struct symtab_and_line
3262 find_pc_line (CORE_ADDR pc
, int notcurrent
)
3264 struct obj_section
*section
;
3266 section
= find_pc_overlay (pc
);
3267 if (pc_in_unmapped_range (pc
, section
))
3268 pc
= overlay_mapped_address (pc
, section
);
3269 return find_pc_sect_line (pc
, section
, notcurrent
);
3275 find_pc_line_symtab (CORE_ADDR pc
)
3277 struct symtab_and_line sal
;
3279 /* This always passes zero for NOTCURRENT to find_pc_line.
3280 There are currently no callers that ever pass non-zero. */
3281 sal
= find_pc_line (pc
, 0);
3285 /* Find line number LINE in any symtab whose name is the same as
3288 If found, return the symtab that contains the linetable in which it was
3289 found, set *INDEX to the index in the linetable of the best entry
3290 found, and set *EXACT_MATCH nonzero if the value returned is an
3293 If not found, return NULL. */
3296 find_line_symtab (struct symtab
*symtab
, int line
,
3297 int *index
, int *exact_match
)
3299 int exact
= 0; /* Initialized here to avoid a compiler warning. */
3301 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
3305 struct linetable
*best_linetable
;
3306 struct symtab
*best_symtab
;
3308 /* First try looking it up in the given symtab. */
3309 best_linetable
= SYMTAB_LINETABLE (symtab
);
3310 best_symtab
= symtab
;
3311 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
3312 if (best_index
< 0 || !exact
)
3314 /* Didn't find an exact match. So we better keep looking for
3315 another symtab with the same name. In the case of xcoff,
3316 multiple csects for one source file (produced by IBM's FORTRAN
3317 compiler) produce multiple symtabs (this is unavoidable
3318 assuming csects can be at arbitrary places in memory and that
3319 the GLOBAL_BLOCK of a symtab has a begin and end address). */
3321 /* BEST is the smallest linenumber > LINE so far seen,
3322 or 0 if none has been seen so far.
3323 BEST_INDEX and BEST_LINETABLE identify the item for it. */
3326 struct objfile
*objfile
;
3327 struct compunit_symtab
*cu
;
3330 if (best_index
>= 0)
3331 best
= best_linetable
->item
[best_index
].line
;
3335 ALL_OBJFILES (objfile
)
3338 objfile
->sf
->qf
->expand_symtabs_with_fullname (objfile
,
3339 symtab_to_fullname (symtab
));
3342 ALL_FILETABS (objfile
, cu
, s
)
3344 struct linetable
*l
;
3347 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
3349 if (FILENAME_CMP (symtab_to_fullname (symtab
),
3350 symtab_to_fullname (s
)) != 0)
3352 l
= SYMTAB_LINETABLE (s
);
3353 ind
= find_line_common (l
, line
, &exact
, 0);
3363 if (best
== 0 || l
->item
[ind
].line
< best
)
3365 best
= l
->item
[ind
].line
;
3378 *index
= best_index
;
3380 *exact_match
= exact
;
3385 /* Given SYMTAB, returns all the PCs function in the symtab that
3386 exactly match LINE. Returns NULL if there are no exact matches,
3387 but updates BEST_ITEM in this case. */
3390 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
3391 struct linetable_entry
**best_item
)
3394 VEC (CORE_ADDR
) *result
= NULL
;
3396 /* First, collect all the PCs that are at this line. */
3402 idx
= find_line_common (SYMTAB_LINETABLE (symtab
), line
, &was_exact
,
3409 struct linetable_entry
*item
= &SYMTAB_LINETABLE (symtab
)->item
[idx
];
3411 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
3417 VEC_safe_push (CORE_ADDR
, result
,
3418 SYMTAB_LINETABLE (symtab
)->item
[idx
].pc
);
3426 /* Set the PC value for a given source file and line number and return true.
3427 Returns zero for invalid line number (and sets the PC to 0).
3428 The source file is specified with a struct symtab. */
3431 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
3433 struct linetable
*l
;
3440 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
3443 l
= SYMTAB_LINETABLE (symtab
);
3444 *pc
= l
->item
[ind
].pc
;
3451 /* Find the range of pc values in a line.
3452 Store the starting pc of the line into *STARTPTR
3453 and the ending pc (start of next line) into *ENDPTR.
3454 Returns 1 to indicate success.
3455 Returns 0 if could not find the specified line. */
3458 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
3461 CORE_ADDR startaddr
;
3462 struct symtab_and_line found_sal
;
3465 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
3468 /* This whole function is based on address. For example, if line 10 has
3469 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
3470 "info line *0x123" should say the line goes from 0x100 to 0x200
3471 and "info line *0x355" should say the line goes from 0x300 to 0x400.
3472 This also insures that we never give a range like "starts at 0x134
3473 and ends at 0x12c". */
3475 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
3476 if (found_sal
.line
!= sal
.line
)
3478 /* The specified line (sal) has zero bytes. */
3479 *startptr
= found_sal
.pc
;
3480 *endptr
= found_sal
.pc
;
3484 *startptr
= found_sal
.pc
;
3485 *endptr
= found_sal
.end
;
3490 /* Given a line table and a line number, return the index into the line
3491 table for the pc of the nearest line whose number is >= the specified one.
3492 Return -1 if none is found. The value is >= 0 if it is an index.
3493 START is the index at which to start searching the line table.
3495 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
3498 find_line_common (struct linetable
*l
, int lineno
,
3499 int *exact_match
, int start
)
3504 /* BEST is the smallest linenumber > LINENO so far seen,
3505 or 0 if none has been seen so far.
3506 BEST_INDEX identifies the item for it. */
3508 int best_index
= -1;
3519 for (i
= start
; i
< len
; i
++)
3521 struct linetable_entry
*item
= &(l
->item
[i
]);
3523 if (item
->line
== lineno
)
3525 /* Return the first (lowest address) entry which matches. */
3530 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
3537 /* If we got here, we didn't get an exact match. */
3542 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
3544 struct symtab_and_line sal
;
3546 sal
= find_pc_line (pc
, 0);
3549 return sal
.symtab
!= 0;
3552 /* Given a function symbol SYM, find the symtab and line for the start
3554 If the argument FUNFIRSTLINE is nonzero, we want the first line
3555 of real code inside the function. */
3557 struct symtab_and_line
3558 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
3560 struct symtab_and_line sal
;
3561 struct obj_section
*section
;
3563 fixup_symbol_section (sym
, NULL
);
3564 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sym
), sym
);
3565 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)), section
, 0);
3567 /* We always should have a line for the function start address.
3568 If we don't, something is odd. Create a plain SAL refering
3569 just the PC and hope that skip_prologue_sal (if requested)
3570 can find a line number for after the prologue. */
3571 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
3574 sal
.pspace
= current_program_space
;
3575 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3576 sal
.section
= section
;
3580 skip_prologue_sal (&sal
);
3585 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
3586 address for that function that has an entry in SYMTAB's line info
3587 table. If such an entry cannot be found, return FUNC_ADDR
3591 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
3593 CORE_ADDR func_start
, func_end
;
3594 struct linetable
*l
;
3597 /* Give up if this symbol has no lineinfo table. */
3598 l
= SYMTAB_LINETABLE (symtab
);
3602 /* Get the range for the function's PC values, or give up if we
3603 cannot, for some reason. */
3604 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
3607 /* Linetable entries are ordered by PC values, see the commentary in
3608 symtab.h where `struct linetable' is defined. Thus, the first
3609 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
3610 address we are looking for. */
3611 for (i
= 0; i
< l
->nitems
; i
++)
3613 struct linetable_entry
*item
= &(l
->item
[i
]);
3615 /* Don't use line numbers of zero, they mark special entries in
3616 the table. See the commentary on symtab.h before the
3617 definition of struct linetable. */
3618 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
3625 /* Adjust SAL to the first instruction past the function prologue.
3626 If the PC was explicitly specified, the SAL is not changed.
3627 If the line number was explicitly specified, at most the SAL's PC
3628 is updated. If SAL is already past the prologue, then do nothing. */
3631 skip_prologue_sal (struct symtab_and_line
*sal
)
3634 struct symtab_and_line start_sal
;
3635 struct cleanup
*old_chain
;
3636 CORE_ADDR pc
, saved_pc
;
3637 struct obj_section
*section
;
3639 struct objfile
*objfile
;
3640 struct gdbarch
*gdbarch
;
3641 const struct block
*b
, *function_block
;
3642 int force_skip
, skip
;
3644 /* Do not change the SAL if PC was specified explicitly. */
3645 if (sal
->explicit_pc
)
3648 old_chain
= save_current_space_and_thread ();
3649 switch_to_program_space_and_thread (sal
->pspace
);
3651 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
3654 fixup_symbol_section (sym
, NULL
);
3656 objfile
= symbol_objfile (sym
);
3657 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3658 section
= SYMBOL_OBJ_SECTION (objfile
, sym
);
3659 name
= SYMBOL_LINKAGE_NAME (sym
);
3663 struct bound_minimal_symbol msymbol
3664 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
3666 if (msymbol
.minsym
== NULL
)
3668 do_cleanups (old_chain
);
3672 objfile
= msymbol
.objfile
;
3673 pc
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
3674 section
= MSYMBOL_OBJ_SECTION (objfile
, msymbol
.minsym
);
3675 name
= MSYMBOL_LINKAGE_NAME (msymbol
.minsym
);
3678 gdbarch
= get_objfile_arch (objfile
);
3680 /* Process the prologue in two passes. In the first pass try to skip the
3681 prologue (SKIP is true) and verify there is a real need for it (indicated
3682 by FORCE_SKIP). If no such reason was found run a second pass where the
3683 prologue is not skipped (SKIP is false). */
3688 /* Be conservative - allow direct PC (without skipping prologue) only if we
3689 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
3690 have to be set by the caller so we use SYM instead. */
3692 && COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (symbol_symtab (sym
))))
3700 /* If the function is in an unmapped overlay, use its unmapped LMA address,
3701 so that gdbarch_skip_prologue has something unique to work on. */
3702 if (section_is_overlay (section
) && !section_is_mapped (section
))
3703 pc
= overlay_unmapped_address (pc
, section
);
3705 /* Skip "first line" of function (which is actually its prologue). */
3706 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3707 if (gdbarch_skip_entrypoint_p (gdbarch
))
3708 pc
= gdbarch_skip_entrypoint (gdbarch
, pc
);
3710 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
3712 /* For overlays, map pc back into its mapped VMA range. */
3713 pc
= overlay_mapped_address (pc
, section
);
3715 /* Calculate line number. */
3716 start_sal
= find_pc_sect_line (pc
, section
, 0);
3718 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
3719 line is still part of the same function. */
3720 if (skip
&& start_sal
.pc
!= pc
3721 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
3722 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
3723 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
).minsym
3724 == lookup_minimal_symbol_by_pc_section (pc
, section
).minsym
)))
3726 /* First pc of next line */
3728 /* Recalculate the line number (might not be N+1). */
3729 start_sal
= find_pc_sect_line (pc
, section
, 0);
3732 /* On targets with executable formats that don't have a concept of
3733 constructors (ELF with .init has, PE doesn't), gcc emits a call
3734 to `__main' in `main' between the prologue and before user
3736 if (gdbarch_skip_main_prologue_p (gdbarch
)
3737 && name
&& strcmp_iw (name
, "main") == 0)
3739 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
3740 /* Recalculate the line number (might not be N+1). */
3741 start_sal
= find_pc_sect_line (pc
, section
, 0);
3745 while (!force_skip
&& skip
--);
3747 /* If we still don't have a valid source line, try to find the first
3748 PC in the lineinfo table that belongs to the same function. This
3749 happens with COFF debug info, which does not seem to have an
3750 entry in lineinfo table for the code after the prologue which has
3751 no direct relation to source. For example, this was found to be
3752 the case with the DJGPP target using "gcc -gcoff" when the
3753 compiler inserted code after the prologue to make sure the stack
3755 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
3757 pc
= skip_prologue_using_lineinfo (pc
, symbol_symtab (sym
));
3758 /* Recalculate the line number. */
3759 start_sal
= find_pc_sect_line (pc
, section
, 0);
3762 do_cleanups (old_chain
);
3764 /* If we're already past the prologue, leave SAL unchanged. Otherwise
3765 forward SAL to the end of the prologue. */
3770 sal
->section
= section
;
3772 /* Unless the explicit_line flag was set, update the SAL line
3773 and symtab to correspond to the modified PC location. */
3774 if (sal
->explicit_line
)
3777 sal
->symtab
= start_sal
.symtab
;
3778 sal
->line
= start_sal
.line
;
3779 sal
->end
= start_sal
.end
;
3781 /* Check if we are now inside an inlined function. If we can,
3782 use the call site of the function instead. */
3783 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
3784 function_block
= NULL
;
3787 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3789 else if (BLOCK_FUNCTION (b
) != NULL
)
3791 b
= BLOCK_SUPERBLOCK (b
);
3793 if (function_block
!= NULL
3794 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
3796 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
3797 sal
->symtab
= symbol_symtab (BLOCK_FUNCTION (function_block
));
3801 /* Given PC at the function's start address, attempt to find the
3802 prologue end using SAL information. Return zero if the skip fails.
3804 A non-optimized prologue traditionally has one SAL for the function
3805 and a second for the function body. A single line function has
3806 them both pointing at the same line.
3808 An optimized prologue is similar but the prologue may contain
3809 instructions (SALs) from the instruction body. Need to skip those
3810 while not getting into the function body.
3812 The functions end point and an increasing SAL line are used as
3813 indicators of the prologue's endpoint.
3815 This code is based on the function refine_prologue_limit
3819 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
3821 struct symtab_and_line prologue_sal
;
3824 const struct block
*bl
;
3826 /* Get an initial range for the function. */
3827 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
3828 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3830 prologue_sal
= find_pc_line (start_pc
, 0);
3831 if (prologue_sal
.line
!= 0)
3833 /* For languages other than assembly, treat two consecutive line
3834 entries at the same address as a zero-instruction prologue.
3835 The GNU assembler emits separate line notes for each instruction
3836 in a multi-instruction macro, but compilers generally will not
3838 if (prologue_sal
.symtab
->language
!= language_asm
)
3840 struct linetable
*linetable
= SYMTAB_LINETABLE (prologue_sal
.symtab
);
3843 /* Skip any earlier lines, and any end-of-sequence marker
3844 from a previous function. */
3845 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
3846 || linetable
->item
[idx
].line
== 0)
3849 if (idx
+1 < linetable
->nitems
3850 && linetable
->item
[idx
+1].line
!= 0
3851 && linetable
->item
[idx
+1].pc
== start_pc
)
3855 /* If there is only one sal that covers the entire function,
3856 then it is probably a single line function, like
3858 if (prologue_sal
.end
>= end_pc
)
3861 while (prologue_sal
.end
< end_pc
)
3863 struct symtab_and_line sal
;
3865 sal
= find_pc_line (prologue_sal
.end
, 0);
3868 /* Assume that a consecutive SAL for the same (or larger)
3869 line mark the prologue -> body transition. */
3870 if (sal
.line
>= prologue_sal
.line
)
3872 /* Likewise if we are in a different symtab altogether
3873 (e.g. within a file included via #include). */
3874 if (sal
.symtab
!= prologue_sal
.symtab
)
3877 /* The line number is smaller. Check that it's from the
3878 same function, not something inlined. If it's inlined,
3879 then there is no point comparing the line numbers. */
3880 bl
= block_for_pc (prologue_sal
.end
);
3883 if (block_inlined_p (bl
))
3885 if (BLOCK_FUNCTION (bl
))
3890 bl
= BLOCK_SUPERBLOCK (bl
);
3895 /* The case in which compiler's optimizer/scheduler has
3896 moved instructions into the prologue. We look ahead in
3897 the function looking for address ranges whose
3898 corresponding line number is less the first one that we
3899 found for the function. This is more conservative then
3900 refine_prologue_limit which scans a large number of SALs
3901 looking for any in the prologue. */
3906 if (prologue_sal
.end
< end_pc
)
3907 /* Return the end of this line, or zero if we could not find a
3909 return prologue_sal
.end
;
3911 /* Don't return END_PC, which is past the end of the function. */
3912 return prologue_sal
.pc
;
3915 /* If P is of the form "operator[ \t]+..." where `...' is
3916 some legitimate operator text, return a pointer to the
3917 beginning of the substring of the operator text.
3918 Otherwise, return "". */
3921 operator_chars (const char *p
, const char **end
)
3924 if (strncmp (p
, "operator", 8))
3928 /* Don't get faked out by `operator' being part of a longer
3930 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
3933 /* Allow some whitespace between `operator' and the operator symbol. */
3934 while (*p
== ' ' || *p
== '\t')
3937 /* Recognize 'operator TYPENAME'. */
3939 if (isalpha (*p
) || *p
== '_' || *p
== '$')
3941 const char *q
= p
+ 1;
3943 while (isalnum (*q
) || *q
== '_' || *q
== '$')
3952 case '\\': /* regexp quoting */
3955 if (p
[2] == '=') /* 'operator\*=' */
3957 else /* 'operator\*' */
3961 else if (p
[1] == '[')
3964 error (_("mismatched quoting on brackets, "
3965 "try 'operator\\[\\]'"));
3966 else if (p
[2] == '\\' && p
[3] == ']')
3968 *end
= p
+ 4; /* 'operator\[\]' */
3972 error (_("nothing is allowed between '[' and ']'"));
3976 /* Gratuitous qoute: skip it and move on. */
3998 if (p
[0] == '-' && p
[1] == '>')
4000 /* Struct pointer member operator 'operator->'. */
4003 *end
= p
+ 3; /* 'operator->*' */
4006 else if (p
[2] == '\\')
4008 *end
= p
+ 4; /* Hopefully 'operator->\*' */
4013 *end
= p
+ 2; /* 'operator->' */
4017 if (p
[1] == '=' || p
[1] == p
[0])
4028 error (_("`operator ()' must be specified "
4029 "without whitespace in `()'"));
4034 error (_("`operator ?:' must be specified "
4035 "without whitespace in `?:'"));
4040 error (_("`operator []' must be specified "
4041 "without whitespace in `[]'"));
4045 error (_("`operator %s' not supported"), p
);
4054 /* Cache to watch for file names already seen by filename_seen. */
4056 struct filename_seen_cache
4058 /* Table of files seen so far. */
4060 /* Initial size of the table. It automagically grows from here. */
4061 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
4064 /* filename_seen_cache constructor. */
4066 static struct filename_seen_cache
*
4067 create_filename_seen_cache (void)
4069 struct filename_seen_cache
*cache
;
4071 cache
= XNEW (struct filename_seen_cache
);
4072 cache
->tab
= htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE
,
4073 filename_hash
, filename_eq
,
4074 NULL
, xcalloc
, xfree
);
4079 /* Empty the cache, but do not delete it. */
4082 clear_filename_seen_cache (struct filename_seen_cache
*cache
)
4084 htab_empty (cache
->tab
);
4087 /* filename_seen_cache destructor.
4088 This takes a void * argument as it is generally used as a cleanup. */
4091 delete_filename_seen_cache (void *ptr
)
4093 struct filename_seen_cache
*cache
= ptr
;
4095 htab_delete (cache
->tab
);
4099 /* If FILE is not already in the table of files in CACHE, return zero;
4100 otherwise return non-zero. Optionally add FILE to the table if ADD
4103 NOTE: We don't manage space for FILE, we assume FILE lives as long
4104 as the caller needs. */
4107 filename_seen (struct filename_seen_cache
*cache
, const char *file
, int add
)
4111 /* Is FILE in tab? */
4112 slot
= htab_find_slot (cache
->tab
, file
, add
? INSERT
: NO_INSERT
);
4116 /* No; maybe add it to tab. */
4118 *slot
= (char *) file
;
4123 /* Data structure to maintain printing state for output_source_filename. */
4125 struct output_source_filename_data
4127 /* Cache of what we've seen so far. */
4128 struct filename_seen_cache
*filename_seen_cache
;
4130 /* Flag of whether we're printing the first one. */
4134 /* Slave routine for sources_info. Force line breaks at ,'s.
4135 NAME is the name to print.
4136 DATA contains the state for printing and watching for duplicates. */
4139 output_source_filename (const char *name
,
4140 struct output_source_filename_data
*data
)
4142 /* Since a single source file can result in several partial symbol
4143 tables, we need to avoid printing it more than once. Note: if
4144 some of the psymtabs are read in and some are not, it gets
4145 printed both under "Source files for which symbols have been
4146 read" and "Source files for which symbols will be read in on
4147 demand". I consider this a reasonable way to deal with the
4148 situation. I'm not sure whether this can also happen for
4149 symtabs; it doesn't hurt to check. */
4151 /* Was NAME already seen? */
4152 if (filename_seen (data
->filename_seen_cache
, name
, 1))
4154 /* Yes; don't print it again. */
4158 /* No; print it and reset *FIRST. */
4160 printf_filtered (", ");
4164 fputs_filtered (name
, gdb_stdout
);
4167 /* A callback for map_partial_symbol_filenames. */
4170 output_partial_symbol_filename (const char *filename
, const char *fullname
,
4173 output_source_filename (fullname
? fullname
: filename
, data
);
4177 sources_info (char *ignore
, int from_tty
)
4179 struct compunit_symtab
*cu
;
4181 struct objfile
*objfile
;
4182 struct output_source_filename_data data
;
4183 struct cleanup
*cleanups
;
4185 if (!have_full_symbols () && !have_partial_symbols ())
4187 error (_("No symbol table is loaded. Use the \"file\" command."));
4190 data
.filename_seen_cache
= create_filename_seen_cache ();
4191 cleanups
= make_cleanup (delete_filename_seen_cache
,
4192 data
.filename_seen_cache
);
4194 printf_filtered ("Source files for which symbols have been read in:\n\n");
4197 ALL_FILETABS (objfile
, cu
, s
)
4199 const char *fullname
= symtab_to_fullname (s
);
4201 output_source_filename (fullname
, &data
);
4203 printf_filtered ("\n\n");
4205 printf_filtered ("Source files for which symbols "
4206 "will be read in on demand:\n\n");
4208 clear_filename_seen_cache (data
.filename_seen_cache
);
4210 map_symbol_filenames (output_partial_symbol_filename
, &data
,
4211 1 /*need_fullname*/);
4212 printf_filtered ("\n");
4214 do_cleanups (cleanups
);
4217 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
4218 non-zero compare only lbasename of FILES. */
4221 file_matches (const char *file
, const char *files
[], int nfiles
, int basenames
)
4225 if (file
!= NULL
&& nfiles
!= 0)
4227 for (i
= 0; i
< nfiles
; i
++)
4229 if (compare_filenames_for_search (file
, (basenames
4230 ? lbasename (files
[i
])
4235 else if (nfiles
== 0)
4240 /* Free any memory associated with a search. */
4243 free_search_symbols (struct symbol_search
*symbols
)
4245 struct symbol_search
*p
;
4246 struct symbol_search
*next
;
4248 for (p
= symbols
; p
!= NULL
; p
= next
)
4256 do_free_search_symbols_cleanup (void *symbolsp
)
4258 struct symbol_search
*symbols
= *(struct symbol_search
**) symbolsp
;
4260 free_search_symbols (symbols
);
4264 make_cleanup_free_search_symbols (struct symbol_search
**symbolsp
)
4266 return make_cleanup (do_free_search_symbols_cleanup
, symbolsp
);
4269 /* Helper function for sort_search_symbols_remove_dups and qsort. Can only
4270 sort symbols, not minimal symbols. */
4273 compare_search_syms (const void *sa
, const void *sb
)
4275 struct symbol_search
*sym_a
= *(struct symbol_search
**) sa
;
4276 struct symbol_search
*sym_b
= *(struct symbol_search
**) sb
;
4279 c
= FILENAME_CMP (symbol_symtab (sym_a
->symbol
)->filename
,
4280 symbol_symtab (sym_b
->symbol
)->filename
);
4284 if (sym_a
->block
!= sym_b
->block
)
4285 return sym_a
->block
- sym_b
->block
;
4287 return strcmp (SYMBOL_PRINT_NAME (sym_a
->symbol
),
4288 SYMBOL_PRINT_NAME (sym_b
->symbol
));
4291 /* Sort the NFOUND symbols in list FOUND and remove duplicates.
4292 The duplicates are freed, and the new list is returned in
4293 *NEW_HEAD, *NEW_TAIL. */
4296 sort_search_symbols_remove_dups (struct symbol_search
*found
, int nfound
,
4297 struct symbol_search
**new_head
,
4298 struct symbol_search
**new_tail
)
4300 struct symbol_search
**symbols
, *symp
, *old_next
;
4303 gdb_assert (found
!= NULL
&& nfound
> 0);
4305 /* Build an array out of the list so we can easily sort them. */
4306 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
4309 for (i
= 0; i
< nfound
; i
++)
4311 gdb_assert (symp
!= NULL
);
4312 gdb_assert (symp
->block
>= 0 && symp
->block
<= 1);
4316 gdb_assert (symp
== NULL
);
4318 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
4319 compare_search_syms
);
4321 /* Collapse out the dups. */
4322 for (i
= 1, j
= 1; i
< nfound
; ++i
)
4324 if (compare_search_syms (&symbols
[j
- 1], &symbols
[i
]) != 0)
4325 symbols
[j
++] = symbols
[i
];
4330 symbols
[j
- 1]->next
= NULL
;
4332 /* Rebuild the linked list. */
4333 for (i
= 0; i
< nunique
- 1; i
++)
4334 symbols
[i
]->next
= symbols
[i
+ 1];
4335 symbols
[nunique
- 1]->next
= NULL
;
4337 *new_head
= symbols
[0];
4338 *new_tail
= symbols
[nunique
- 1];
4342 /* An object of this type is passed as the user_data to the
4343 expand_symtabs_matching method. */
4344 struct search_symbols_data
4349 /* It is true if PREG contains valid data, false otherwise. */
4350 unsigned preg_p
: 1;
4354 /* A callback for expand_symtabs_matching. */
4357 search_symbols_file_matches (const char *filename
, void *user_data
,
4360 struct search_symbols_data
*data
= user_data
;
4362 return file_matches (filename
, data
->files
, data
->nfiles
, basenames
);
4365 /* A callback for expand_symtabs_matching. */
4368 search_symbols_name_matches (const char *symname
, void *user_data
)
4370 struct search_symbols_data
*data
= user_data
;
4372 return !data
->preg_p
|| regexec (&data
->preg
, symname
, 0, NULL
, 0) == 0;
4375 /* Search the symbol table for matches to the regular expression REGEXP,
4376 returning the results in *MATCHES.
4378 Only symbols of KIND are searched:
4379 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
4380 and constants (enums)
4381 FUNCTIONS_DOMAIN - search all functions
4382 TYPES_DOMAIN - search all type names
4383 ALL_DOMAIN - an internal error for this function
4385 free_search_symbols should be called when *MATCHES is no longer needed.
4387 Within each file the results are sorted locally; each symtab's global and
4388 static blocks are separately alphabetized.
4389 Duplicate entries are removed. */
4392 search_symbols (const char *regexp
, enum search_domain kind
,
4393 int nfiles
, const char *files
[],
4394 struct symbol_search
**matches
)
4396 struct compunit_symtab
*cust
;
4397 const struct blockvector
*bv
;
4400 struct block_iterator iter
;
4402 struct objfile
*objfile
;
4403 struct minimal_symbol
*msymbol
;
4405 static const enum minimal_symbol_type types
[]
4406 = {mst_data
, mst_text
, mst_abs
};
4407 static const enum minimal_symbol_type types2
[]
4408 = {mst_bss
, mst_file_text
, mst_abs
};
4409 static const enum minimal_symbol_type types3
[]
4410 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
4411 static const enum minimal_symbol_type types4
[]
4412 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
4413 enum minimal_symbol_type ourtype
;
4414 enum minimal_symbol_type ourtype2
;
4415 enum minimal_symbol_type ourtype3
;
4416 enum minimal_symbol_type ourtype4
;
4417 struct symbol_search
*found
;
4418 struct symbol_search
*tail
;
4419 struct search_symbols_data datum
;
4422 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
4423 CLEANUP_CHAIN is freed only in the case of an error. */
4424 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
4425 struct cleanup
*retval_chain
;
4427 gdb_assert (kind
<= TYPES_DOMAIN
);
4429 ourtype
= types
[kind
];
4430 ourtype2
= types2
[kind
];
4431 ourtype3
= types3
[kind
];
4432 ourtype4
= types4
[kind
];
4439 /* Make sure spacing is right for C++ operators.
4440 This is just a courtesy to make the matching less sensitive
4441 to how many spaces the user leaves between 'operator'
4442 and <TYPENAME> or <OPERATOR>. */
4444 const char *opname
= operator_chars (regexp
, &opend
);
4449 int fix
= -1; /* -1 means ok; otherwise number of
4452 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
4454 /* There should 1 space between 'operator' and 'TYPENAME'. */
4455 if (opname
[-1] != ' ' || opname
[-2] == ' ')
4460 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
4461 if (opname
[-1] == ' ')
4464 /* If wrong number of spaces, fix it. */
4467 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
4469 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
4474 errcode
= regcomp (&datum
.preg
, regexp
,
4475 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
4479 char *err
= get_regcomp_error (errcode
, &datum
.preg
);
4481 make_cleanup (xfree
, err
);
4482 error (_("Invalid regexp (%s): %s"), err
, regexp
);
4485 make_regfree_cleanup (&datum
.preg
);
4488 /* Search through the partial symtabs *first* for all symbols
4489 matching the regexp. That way we don't have to reproduce all of
4490 the machinery below. */
4492 datum
.nfiles
= nfiles
;
4493 datum
.files
= files
;
4494 expand_symtabs_matching ((nfiles
== 0
4496 : search_symbols_file_matches
),
4497 search_symbols_name_matches
,
4500 /* Here, we search through the minimal symbol tables for functions
4501 and variables that match, and force their symbols to be read.
4502 This is in particular necessary for demangled variable names,
4503 which are no longer put into the partial symbol tables.
4504 The symbol will then be found during the scan of symtabs below.
4506 For functions, find_pc_symtab should succeed if we have debug info
4507 for the function, for variables we have to call
4508 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
4510 If the lookup fails, set found_misc so that we will rescan to print
4511 any matching symbols without debug info.
4512 We only search the objfile the msymbol came from, we no longer search
4513 all objfiles. In large programs (1000s of shared libs) searching all
4514 objfiles is not worth the pain. */
4516 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
4518 ALL_MSYMBOLS (objfile
, msymbol
)
4522 if (msymbol
->created_by_gdb
)
4525 if (MSYMBOL_TYPE (msymbol
) == ourtype
4526 || MSYMBOL_TYPE (msymbol
) == ourtype2
4527 || MSYMBOL_TYPE (msymbol
) == ourtype3
4528 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4531 || regexec (&datum
.preg
, MSYMBOL_NATURAL_NAME (msymbol
), 0,
4534 /* Note: An important side-effect of these lookup functions
4535 is to expand the symbol table if msymbol is found, for the
4536 benefit of the next loop on ALL_COMPUNITS. */
4537 if (kind
== FUNCTIONS_DOMAIN
4538 ? (find_pc_compunit_symtab
4539 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
)) == NULL
)
4540 : (lookup_symbol_in_objfile_from_linkage_name
4541 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
4552 retval_chain
= make_cleanup_free_search_symbols (&found
);
4554 ALL_COMPUNITS (objfile
, cust
)
4556 bv
= COMPUNIT_BLOCKVECTOR (cust
);
4557 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
4559 b
= BLOCKVECTOR_BLOCK (bv
, i
);
4560 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4562 struct symtab
*real_symtab
= symbol_symtab (sym
);
4566 /* Check first sole REAL_SYMTAB->FILENAME. It does not need to be
4567 a substring of symtab_to_fullname as it may contain "./" etc. */
4568 if ((file_matches (real_symtab
->filename
, files
, nfiles
, 0)
4569 || ((basenames_may_differ
4570 || file_matches (lbasename (real_symtab
->filename
),
4572 && file_matches (symtab_to_fullname (real_symtab
),
4575 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (sym
), 0,
4577 && ((kind
== VARIABLES_DOMAIN
4578 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
4579 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
4580 && SYMBOL_CLASS (sym
) != LOC_BLOCK
4581 /* LOC_CONST can be used for more than just enums,
4582 e.g., c++ static const members.
4583 We only want to skip enums here. */
4584 && !(SYMBOL_CLASS (sym
) == LOC_CONST
4585 && (TYPE_CODE (SYMBOL_TYPE (sym
))
4586 == TYPE_CODE_ENUM
)))
4587 || (kind
== FUNCTIONS_DOMAIN
4588 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4589 || (kind
== TYPES_DOMAIN
4590 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
4593 struct symbol_search
*psr
= (struct symbol_search
*)
4594 xmalloc (sizeof (struct symbol_search
));
4597 memset (&psr
->msymbol
, 0, sizeof (psr
->msymbol
));
4612 sort_search_symbols_remove_dups (found
, nfound
, &found
, &tail
);
4613 /* Note: nfound is no longer useful beyond this point. */
4616 /* If there are no eyes, avoid all contact. I mean, if there are
4617 no debug symbols, then add matching minsyms. */
4619 if (found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
4621 ALL_MSYMBOLS (objfile
, msymbol
)
4625 if (msymbol
->created_by_gdb
)
4628 if (MSYMBOL_TYPE (msymbol
) == ourtype
4629 || MSYMBOL_TYPE (msymbol
) == ourtype2
4630 || MSYMBOL_TYPE (msymbol
) == ourtype3
4631 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4634 || regexec (&datum
.preg
, MSYMBOL_NATURAL_NAME (msymbol
), 0,
4637 /* For functions we can do a quick check of whether the
4638 symbol might be found via find_pc_symtab. */
4639 if (kind
!= FUNCTIONS_DOMAIN
4640 || (find_pc_compunit_symtab
4641 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
)) == NULL
))
4643 if (lookup_symbol_in_objfile_from_linkage_name
4644 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
4648 struct symbol_search
*psr
= (struct symbol_search
*)
4649 xmalloc (sizeof (struct symbol_search
));
4651 psr
->msymbol
.minsym
= msymbol
;
4652 psr
->msymbol
.objfile
= objfile
;
4667 discard_cleanups (retval_chain
);
4668 do_cleanups (old_chain
);
4672 /* Helper function for symtab_symbol_info, this function uses
4673 the data returned from search_symbols() to print information
4674 regarding the match to gdb_stdout. */
4677 print_symbol_info (enum search_domain kind
,
4679 int block
, const char *last
)
4681 struct symtab
*s
= symbol_symtab (sym
);
4682 const char *s_filename
= symtab_to_filename_for_display (s
);
4684 if (last
== NULL
|| filename_cmp (last
, s_filename
) != 0)
4686 fputs_filtered ("\nFile ", gdb_stdout
);
4687 fputs_filtered (s_filename
, gdb_stdout
);
4688 fputs_filtered (":\n", gdb_stdout
);
4691 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
4692 printf_filtered ("static ");
4694 /* Typedef that is not a C++ class. */
4695 if (kind
== TYPES_DOMAIN
4696 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
4697 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
4698 /* variable, func, or typedef-that-is-c++-class. */
4699 else if (kind
< TYPES_DOMAIN
4700 || (kind
== TYPES_DOMAIN
4701 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
4703 type_print (SYMBOL_TYPE (sym
),
4704 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4705 ? "" : SYMBOL_PRINT_NAME (sym
)),
4708 printf_filtered (";\n");
4712 /* This help function for symtab_symbol_info() prints information
4713 for non-debugging symbols to gdb_stdout. */
4716 print_msymbol_info (struct bound_minimal_symbol msymbol
)
4718 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol
.objfile
);
4721 if (gdbarch_addr_bit (gdbarch
) <= 32)
4722 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
)
4723 & (CORE_ADDR
) 0xffffffff,
4726 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
),
4728 printf_filtered ("%s %s\n",
4729 tmp
, MSYMBOL_PRINT_NAME (msymbol
.minsym
));
4732 /* This is the guts of the commands "info functions", "info types", and
4733 "info variables". It calls search_symbols to find all matches and then
4734 print_[m]symbol_info to print out some useful information about the
4738 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
4740 static const char * const classnames
[] =
4741 {"variable", "function", "type"};
4742 struct symbol_search
*symbols
;
4743 struct symbol_search
*p
;
4744 struct cleanup
*old_chain
;
4745 const char *last_filename
= NULL
;
4748 gdb_assert (kind
<= TYPES_DOMAIN
);
4750 /* Must make sure that if we're interrupted, symbols gets freed. */
4751 search_symbols (regexp
, kind
, 0, NULL
, &symbols
);
4752 old_chain
= make_cleanup_free_search_symbols (&symbols
);
4755 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
4756 classnames
[kind
], regexp
);
4758 printf_filtered (_("All defined %ss:\n"), classnames
[kind
]);
4760 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
4764 if (p
->msymbol
.minsym
!= NULL
)
4768 printf_filtered (_("\nNon-debugging symbols:\n"));
4771 print_msymbol_info (p
->msymbol
);
4775 print_symbol_info (kind
,
4780 = symtab_to_filename_for_display (symbol_symtab (p
->symbol
));
4784 do_cleanups (old_chain
);
4788 variables_info (char *regexp
, int from_tty
)
4790 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
4794 functions_info (char *regexp
, int from_tty
)
4796 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
4801 types_info (char *regexp
, int from_tty
)
4803 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
4806 /* Breakpoint all functions matching regular expression. */
4809 rbreak_command_wrapper (char *regexp
, int from_tty
)
4811 rbreak_command (regexp
, from_tty
);
4814 /* A cleanup function that calls end_rbreak_breakpoints. */
4817 do_end_rbreak_breakpoints (void *ignore
)
4819 end_rbreak_breakpoints ();
4823 rbreak_command (char *regexp
, int from_tty
)
4825 struct symbol_search
*ss
;
4826 struct symbol_search
*p
;
4827 struct cleanup
*old_chain
;
4828 char *string
= NULL
;
4830 const char **files
= NULL
;
4831 const char *file_name
;
4836 char *colon
= strchr (regexp
, ':');
4838 if (colon
&& *(colon
+ 1) != ':')
4843 colon_index
= colon
- regexp
;
4844 local_name
= alloca (colon_index
+ 1);
4845 memcpy (local_name
, regexp
, colon_index
);
4846 local_name
[colon_index
--] = 0;
4847 while (isspace (local_name
[colon_index
]))
4848 local_name
[colon_index
--] = 0;
4849 file_name
= local_name
;
4852 regexp
= skip_spaces (colon
+ 1);
4856 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
4857 old_chain
= make_cleanup_free_search_symbols (&ss
);
4858 make_cleanup (free_current_contents
, &string
);
4860 start_rbreak_breakpoints ();
4861 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
4862 for (p
= ss
; p
!= NULL
; p
= p
->next
)
4864 if (p
->msymbol
.minsym
== NULL
)
4866 struct symtab
*symtab
= symbol_symtab (p
->symbol
);
4867 const char *fullname
= symtab_to_fullname (symtab
);
4869 int newlen
= (strlen (fullname
)
4870 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
4875 string
= xrealloc (string
, newlen
);
4878 strcpy (string
, fullname
);
4879 strcat (string
, ":'");
4880 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
4881 strcat (string
, "'");
4882 break_command (string
, from_tty
);
4883 print_symbol_info (FUNCTIONS_DOMAIN
,
4886 symtab_to_filename_for_display (symtab
));
4890 int newlen
= (strlen (MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
)) + 3);
4894 string
= xrealloc (string
, newlen
);
4897 strcpy (string
, "'");
4898 strcat (string
, MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
));
4899 strcat (string
, "'");
4901 break_command (string
, from_tty
);
4902 printf_filtered ("<function, no debug info> %s;\n",
4903 MSYMBOL_PRINT_NAME (p
->msymbol
.minsym
));
4907 do_cleanups (old_chain
);
4911 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
4913 Either sym_text[sym_text_len] != '(' and then we search for any
4914 symbol starting with SYM_TEXT text.
4916 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
4917 be terminated at that point. Partial symbol tables do not have parameters
4921 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
4923 int (*ncmp
) (const char *, const char *, size_t);
4925 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
4927 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
4930 if (sym_text
[sym_text_len
] == '(')
4932 /* User searches for `name(someth...'. Require NAME to be terminated.
4933 Normally psymtabs and gdbindex have no parameter types so '\0' will be
4934 present but accept even parameters presence. In this case this
4935 function is in fact strcmp_iw but whitespace skipping is not supported
4936 for tab completion. */
4938 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
4945 /* Free any memory associated with a completion list. */
4948 free_completion_list (VEC (char_ptr
) **list_ptr
)
4953 for (i
= 0; VEC_iterate (char_ptr
, *list_ptr
, i
, p
); ++i
)
4955 VEC_free (char_ptr
, *list_ptr
);
4958 /* Callback for make_cleanup. */
4961 do_free_completion_list (void *list
)
4963 free_completion_list (list
);
4966 /* Helper routine for make_symbol_completion_list. */
4968 static VEC (char_ptr
) *return_val
;
4970 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
4971 completion_list_add_name \
4972 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
4974 #define MCOMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
4975 completion_list_add_name \
4976 (MSYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
4978 /* Test to see if the symbol specified by SYMNAME (which is already
4979 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
4980 characters. If so, add it to the current completion list. */
4983 completion_list_add_name (const char *symname
,
4984 const char *sym_text
, int sym_text_len
,
4985 const char *text
, const char *word
)
4987 /* Clip symbols that cannot match. */
4988 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
4991 /* We have a match for a completion, so add SYMNAME to the current list
4992 of matches. Note that the name is moved to freshly malloc'd space. */
4997 if (word
== sym_text
)
4999 new = xmalloc (strlen (symname
) + 5);
5000 strcpy (new, symname
);
5002 else if (word
> sym_text
)
5004 /* Return some portion of symname. */
5005 new = xmalloc (strlen (symname
) + 5);
5006 strcpy (new, symname
+ (word
- sym_text
));
5010 /* Return some of SYM_TEXT plus symname. */
5011 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
5012 strncpy (new, word
, sym_text
- word
);
5013 new[sym_text
- word
] = '\0';
5014 strcat (new, symname
);
5017 VEC_safe_push (char_ptr
, return_val
, new);
5021 /* ObjC: In case we are completing on a selector, look as the msymbol
5022 again and feed all the selectors into the mill. */
5025 completion_list_objc_symbol (struct minimal_symbol
*msymbol
,
5026 const char *sym_text
, int sym_text_len
,
5027 const char *text
, const char *word
)
5029 static char *tmp
= NULL
;
5030 static unsigned int tmplen
= 0;
5032 const char *method
, *category
, *selector
;
5035 method
= MSYMBOL_NATURAL_NAME (msymbol
);
5037 /* Is it a method? */
5038 if ((method
[0] != '-') && (method
[0] != '+'))
5041 if (sym_text
[0] == '[')
5042 /* Complete on shortened method method. */
5043 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
5045 while ((strlen (method
) + 1) >= tmplen
)
5051 tmp
= xrealloc (tmp
, tmplen
);
5053 selector
= strchr (method
, ' ');
5054 if (selector
!= NULL
)
5057 category
= strchr (method
, '(');
5059 if ((category
!= NULL
) && (selector
!= NULL
))
5061 memcpy (tmp
, method
, (category
- method
));
5062 tmp
[category
- method
] = ' ';
5063 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
5064 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
5065 if (sym_text
[0] == '[')
5066 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
5069 if (selector
!= NULL
)
5071 /* Complete on selector only. */
5072 strcpy (tmp
, selector
);
5073 tmp2
= strchr (tmp
, ']');
5077 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
5081 /* Break the non-quoted text based on the characters which are in
5082 symbols. FIXME: This should probably be language-specific. */
5085 language_search_unquoted_string (const char *text
, const char *p
)
5087 for (; p
> text
; --p
)
5089 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
5093 if ((current_language
->la_language
== language_objc
))
5095 if (p
[-1] == ':') /* Might be part of a method name. */
5097 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
5098 p
-= 2; /* Beginning of a method name. */
5099 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
5100 { /* Might be part of a method name. */
5103 /* Seeing a ' ' or a '(' is not conclusive evidence
5104 that we are in the middle of a method name. However,
5105 finding "-[" or "+[" should be pretty un-ambiguous.
5106 Unfortunately we have to find it now to decide. */
5109 if (isalnum (t
[-1]) || t
[-1] == '_' ||
5110 t
[-1] == ' ' || t
[-1] == ':' ||
5111 t
[-1] == '(' || t
[-1] == ')')
5116 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
5117 p
= t
- 2; /* Method name detected. */
5118 /* Else we leave with p unchanged. */
5128 completion_list_add_fields (struct symbol
*sym
, const char *sym_text
,
5129 int sym_text_len
, const char *text
,
5132 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
5134 struct type
*t
= SYMBOL_TYPE (sym
);
5135 enum type_code c
= TYPE_CODE (t
);
5138 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
5139 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
5140 if (TYPE_FIELD_NAME (t
, j
))
5141 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
5142 sym_text
, sym_text_len
, text
, word
);
5146 /* Type of the user_data argument passed to add_macro_name or
5147 symbol_completion_matcher. The contents are simply whatever is
5148 needed by completion_list_add_name. */
5149 struct add_name_data
5151 const char *sym_text
;
5157 /* A callback used with macro_for_each and macro_for_each_in_scope.
5158 This adds a macro's name to the current completion list. */
5161 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
5162 struct macro_source_file
*ignore2
, int ignore3
,
5165 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
5167 completion_list_add_name (name
,
5168 datum
->sym_text
, datum
->sym_text_len
,
5169 datum
->text
, datum
->word
);
5172 /* A callback for expand_symtabs_matching. */
5175 symbol_completion_matcher (const char *name
, void *user_data
)
5177 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
5179 return compare_symbol_name (name
, datum
->sym_text
, datum
->sym_text_len
);
5183 default_make_symbol_completion_list_break_on (const char *text
,
5185 const char *break_on
,
5186 enum type_code code
)
5188 /* Problem: All of the symbols have to be copied because readline
5189 frees them. I'm not going to worry about this; hopefully there
5190 won't be that many. */
5193 struct compunit_symtab
*cust
;
5194 struct minimal_symbol
*msymbol
;
5195 struct objfile
*objfile
;
5196 const struct block
*b
;
5197 const struct block
*surrounding_static_block
, *surrounding_global_block
;
5198 struct block_iterator iter
;
5199 /* The symbol we are completing on. Points in same buffer as text. */
5200 const char *sym_text
;
5201 /* Length of sym_text. */
5203 struct add_name_data datum
;
5204 struct cleanup
*back_to
;
5206 /* Now look for the symbol we are supposed to complete on. */
5210 const char *quote_pos
= NULL
;
5212 /* First see if this is a quoted string. */
5214 for (p
= text
; *p
!= '\0'; ++p
)
5216 if (quote_found
!= '\0')
5218 if (*p
== quote_found
)
5219 /* Found close quote. */
5221 else if (*p
== '\\' && p
[1] == quote_found
)
5222 /* A backslash followed by the quote character
5223 doesn't end the string. */
5226 else if (*p
== '\'' || *p
== '"')
5232 if (quote_found
== '\'')
5233 /* A string within single quotes can be a symbol, so complete on it. */
5234 sym_text
= quote_pos
+ 1;
5235 else if (quote_found
== '"')
5236 /* A double-quoted string is never a symbol, nor does it make sense
5237 to complete it any other way. */
5243 /* It is not a quoted string. Break it based on the characters
5244 which are in symbols. */
5247 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
5248 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
5257 sym_text_len
= strlen (sym_text
);
5259 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
5261 if (current_language
->la_language
== language_cplus
5262 || current_language
->la_language
== language_java
5263 || current_language
->la_language
== language_fortran
)
5265 /* These languages may have parameters entered by user but they are never
5266 present in the partial symbol tables. */
5268 const char *cs
= memchr (sym_text
, '(', sym_text_len
);
5271 sym_text_len
= cs
- sym_text
;
5273 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
5276 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
5278 datum
.sym_text
= sym_text
;
5279 datum
.sym_text_len
= sym_text_len
;
5283 /* Look through the partial symtabs for all symbols which begin
5284 by matching SYM_TEXT. Expand all CUs that you find to the list.
5285 The real names will get added by COMPLETION_LIST_ADD_SYMBOL below. */
5286 expand_symtabs_matching (NULL
, symbol_completion_matcher
, ALL_DOMAIN
,
5289 /* At this point scan through the misc symbol vectors and add each
5290 symbol you find to the list. Eventually we want to ignore
5291 anything that isn't a text symbol (everything else will be
5292 handled by the psymtab code above). */
5294 if (code
== TYPE_CODE_UNDEF
)
5296 ALL_MSYMBOLS (objfile
, msymbol
)
5299 MCOMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
,
5302 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
,
5307 /* Search upwards from currently selected frame (so that we can
5308 complete on local vars). Also catch fields of types defined in
5309 this places which match our text string. Only complete on types
5310 visible from current context. */
5312 b
= get_selected_block (0);
5313 surrounding_static_block
= block_static_block (b
);
5314 surrounding_global_block
= block_global_block (b
);
5315 if (surrounding_static_block
!= NULL
)
5316 while (b
!= surrounding_static_block
)
5320 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5322 if (code
== TYPE_CODE_UNDEF
)
5324 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
5326 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
5329 else if (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5330 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
5331 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
5335 /* Stop when we encounter an enclosing function. Do not stop for
5336 non-inlined functions - the locals of the enclosing function
5337 are in scope for a nested function. */
5338 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
5340 b
= BLOCK_SUPERBLOCK (b
);
5343 /* Add fields from the file's types; symbols will be added below. */
5345 if (code
== TYPE_CODE_UNDEF
)
5347 if (surrounding_static_block
!= NULL
)
5348 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
5349 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
5351 if (surrounding_global_block
!= NULL
)
5352 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
5353 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
5356 /* Go through the symtabs and check the externs and statics for
5357 symbols which match. */
5359 ALL_COMPUNITS (objfile
, cust
)
5362 b
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), GLOBAL_BLOCK
);
5363 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5365 if (code
== TYPE_CODE_UNDEF
5366 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5367 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
5368 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
5372 ALL_COMPUNITS (objfile
, cust
)
5375 b
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), STATIC_BLOCK
);
5376 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5378 if (code
== TYPE_CODE_UNDEF
5379 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5380 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
5381 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
5385 /* Skip macros if we are completing a struct tag -- arguable but
5386 usually what is expected. */
5387 if (current_language
->la_macro_expansion
== macro_expansion_c
5388 && code
== TYPE_CODE_UNDEF
)
5390 struct macro_scope
*scope
;
5392 /* Add any macros visible in the default scope. Note that this
5393 may yield the occasional wrong result, because an expression
5394 might be evaluated in a scope other than the default. For
5395 example, if the user types "break file:line if <TAB>", the
5396 resulting expression will be evaluated at "file:line" -- but
5397 at there does not seem to be a way to detect this at
5399 scope
= default_macro_scope ();
5402 macro_for_each_in_scope (scope
->file
, scope
->line
,
5403 add_macro_name
, &datum
);
5407 /* User-defined macros are always visible. */
5408 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
5411 discard_cleanups (back_to
);
5412 return (return_val
);
5416 default_make_symbol_completion_list (const char *text
, const char *word
,
5417 enum type_code code
)
5419 return default_make_symbol_completion_list_break_on (text
, word
, "", code
);
5422 /* Return a vector of all symbols (regardless of class) which begin by
5423 matching TEXT. If the answer is no symbols, then the return value
5427 make_symbol_completion_list (const char *text
, const char *word
)
5429 return current_language
->la_make_symbol_completion_list (text
, word
,
5433 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
5434 symbols whose type code is CODE. */
5437 make_symbol_completion_type (const char *text
, const char *word
,
5438 enum type_code code
)
5440 gdb_assert (code
== TYPE_CODE_UNION
5441 || code
== TYPE_CODE_STRUCT
5442 || code
== TYPE_CODE_ENUM
);
5443 return current_language
->la_make_symbol_completion_list (text
, word
, code
);
5446 /* Like make_symbol_completion_list, but suitable for use as a
5447 completion function. */
5450 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
5451 const char *text
, const char *word
)
5453 return make_symbol_completion_list (text
, word
);
5456 /* Like make_symbol_completion_list, but returns a list of symbols
5457 defined in a source file FILE. */
5460 make_file_symbol_completion_list (const char *text
, const char *word
,
5461 const char *srcfile
)
5466 struct block_iterator iter
;
5467 /* The symbol we are completing on. Points in same buffer as text. */
5468 const char *sym_text
;
5469 /* Length of sym_text. */
5472 /* Now look for the symbol we are supposed to complete on.
5473 FIXME: This should be language-specific. */
5477 const char *quote_pos
= NULL
;
5479 /* First see if this is a quoted string. */
5481 for (p
= text
; *p
!= '\0'; ++p
)
5483 if (quote_found
!= '\0')
5485 if (*p
== quote_found
)
5486 /* Found close quote. */
5488 else if (*p
== '\\' && p
[1] == quote_found
)
5489 /* A backslash followed by the quote character
5490 doesn't end the string. */
5493 else if (*p
== '\'' || *p
== '"')
5499 if (quote_found
== '\'')
5500 /* A string within single quotes can be a symbol, so complete on it. */
5501 sym_text
= quote_pos
+ 1;
5502 else if (quote_found
== '"')
5503 /* A double-quoted string is never a symbol, nor does it make sense
5504 to complete it any other way. */
5510 /* Not a quoted string. */
5511 sym_text
= language_search_unquoted_string (text
, p
);
5515 sym_text_len
= strlen (sym_text
);
5519 /* Find the symtab for SRCFILE (this loads it if it was not yet read
5521 s
= lookup_symtab (srcfile
);
5524 /* Maybe they typed the file with leading directories, while the
5525 symbol tables record only its basename. */
5526 const char *tail
= lbasename (srcfile
);
5529 s
= lookup_symtab (tail
);
5532 /* If we have no symtab for that file, return an empty list. */
5534 return (return_val
);
5536 /* Go through this symtab and check the externs and statics for
5537 symbols which match. */
5539 b
= BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (s
), GLOBAL_BLOCK
);
5540 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5542 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
5545 b
= BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (s
), STATIC_BLOCK
);
5546 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5548 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
5551 return (return_val
);
5554 /* A helper function for make_source_files_completion_list. It adds
5555 another file name to a list of possible completions, growing the
5556 list as necessary. */
5559 add_filename_to_list (const char *fname
, const char *text
, const char *word
,
5560 VEC (char_ptr
) **list
)
5563 size_t fnlen
= strlen (fname
);
5567 /* Return exactly fname. */
5568 new = xmalloc (fnlen
+ 5);
5569 strcpy (new, fname
);
5571 else if (word
> text
)
5573 /* Return some portion of fname. */
5574 new = xmalloc (fnlen
+ 5);
5575 strcpy (new, fname
+ (word
- text
));
5579 /* Return some of TEXT plus fname. */
5580 new = xmalloc (fnlen
+ (text
- word
) + 5);
5581 strncpy (new, word
, text
- word
);
5582 new[text
- word
] = '\0';
5583 strcat (new, fname
);
5585 VEC_safe_push (char_ptr
, *list
, new);
5589 not_interesting_fname (const char *fname
)
5591 static const char *illegal_aliens
[] = {
5592 "_globals_", /* inserted by coff_symtab_read */
5597 for (i
= 0; illegal_aliens
[i
]; i
++)
5599 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
5605 /* An object of this type is passed as the user_data argument to
5606 map_partial_symbol_filenames. */
5607 struct add_partial_filename_data
5609 struct filename_seen_cache
*filename_seen_cache
;
5613 VEC (char_ptr
) **list
;
5616 /* A callback for map_partial_symbol_filenames. */
5619 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
5622 struct add_partial_filename_data
*data
= user_data
;
5624 if (not_interesting_fname (filename
))
5626 if (!filename_seen (data
->filename_seen_cache
, filename
, 1)
5627 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
5629 /* This file matches for a completion; add it to the
5630 current list of matches. */
5631 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
5635 const char *base_name
= lbasename (filename
);
5637 if (base_name
!= filename
5638 && !filename_seen (data
->filename_seen_cache
, base_name
, 1)
5639 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
5640 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
5644 /* Return a vector of all source files whose names begin with matching
5645 TEXT. The file names are looked up in the symbol tables of this
5646 program. If the answer is no matchess, then the return value is
5650 make_source_files_completion_list (const char *text
, const char *word
)
5652 struct compunit_symtab
*cu
;
5654 struct objfile
*objfile
;
5655 size_t text_len
= strlen (text
);
5656 VEC (char_ptr
) *list
= NULL
;
5657 const char *base_name
;
5658 struct add_partial_filename_data datum
;
5659 struct filename_seen_cache
*filename_seen_cache
;
5660 struct cleanup
*back_to
, *cache_cleanup
;
5662 if (!have_full_symbols () && !have_partial_symbols ())
5665 back_to
= make_cleanup (do_free_completion_list
, &list
);
5667 filename_seen_cache
= create_filename_seen_cache ();
5668 cache_cleanup
= make_cleanup (delete_filename_seen_cache
,
5669 filename_seen_cache
);
5671 ALL_FILETABS (objfile
, cu
, s
)
5673 if (not_interesting_fname (s
->filename
))
5675 if (!filename_seen (filename_seen_cache
, s
->filename
, 1)
5676 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
5678 /* This file matches for a completion; add it to the current
5680 add_filename_to_list (s
->filename
, text
, word
, &list
);
5684 /* NOTE: We allow the user to type a base name when the
5685 debug info records leading directories, but not the other
5686 way around. This is what subroutines of breakpoint
5687 command do when they parse file names. */
5688 base_name
= lbasename (s
->filename
);
5689 if (base_name
!= s
->filename
5690 && !filename_seen (filename_seen_cache
, base_name
, 1)
5691 && filename_ncmp (base_name
, text
, text_len
) == 0)
5692 add_filename_to_list (base_name
, text
, word
, &list
);
5696 datum
.filename_seen_cache
= filename_seen_cache
;
5699 datum
.text_len
= text_len
;
5701 map_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
5702 0 /*need_fullname*/);
5704 do_cleanups (cache_cleanup
);
5705 discard_cleanups (back_to
);
5712 /* Return the "main_info" object for the current program space. If
5713 the object has not yet been created, create it and fill in some
5716 static struct main_info
*
5717 get_main_info (void)
5719 struct main_info
*info
= program_space_data (current_program_space
,
5720 main_progspace_key
);
5724 /* It may seem strange to store the main name in the progspace
5725 and also in whatever objfile happens to see a main name in
5726 its debug info. The reason for this is mainly historical:
5727 gdb returned "main" as the name even if no function named
5728 "main" was defined the program; and this approach lets us
5729 keep compatibility. */
5730 info
= XCNEW (struct main_info
);
5731 info
->language_of_main
= language_unknown
;
5732 set_program_space_data (current_program_space
, main_progspace_key
,
5739 /* A cleanup to destroy a struct main_info when a progspace is
5743 main_info_cleanup (struct program_space
*pspace
, void *data
)
5745 struct main_info
*info
= data
;
5748 xfree (info
->name_of_main
);
5753 set_main_name (const char *name
, enum language lang
)
5755 struct main_info
*info
= get_main_info ();
5757 if (info
->name_of_main
!= NULL
)
5759 xfree (info
->name_of_main
);
5760 info
->name_of_main
= NULL
;
5761 info
->language_of_main
= language_unknown
;
5765 info
->name_of_main
= xstrdup (name
);
5766 info
->language_of_main
= lang
;
5770 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
5774 find_main_name (void)
5776 const char *new_main_name
;
5777 struct objfile
*objfile
;
5779 /* First check the objfiles to see whether a debuginfo reader has
5780 picked up the appropriate main name. Historically the main name
5781 was found in a more or less random way; this approach instead
5782 relies on the order of objfile creation -- which still isn't
5783 guaranteed to get the correct answer, but is just probably more
5785 ALL_OBJFILES (objfile
)
5787 if (objfile
->per_bfd
->name_of_main
!= NULL
)
5789 set_main_name (objfile
->per_bfd
->name_of_main
,
5790 objfile
->per_bfd
->language_of_main
);
5795 /* Try to see if the main procedure is in Ada. */
5796 /* FIXME: brobecker/2005-03-07: Another way of doing this would
5797 be to add a new method in the language vector, and call this
5798 method for each language until one of them returns a non-empty
5799 name. This would allow us to remove this hard-coded call to
5800 an Ada function. It is not clear that this is a better approach
5801 at this point, because all methods need to be written in a way
5802 such that false positives never be returned. For instance, it is
5803 important that a method does not return a wrong name for the main
5804 procedure if the main procedure is actually written in a different
5805 language. It is easy to guaranty this with Ada, since we use a
5806 special symbol generated only when the main in Ada to find the name
5807 of the main procedure. It is difficult however to see how this can
5808 be guarantied for languages such as C, for instance. This suggests
5809 that order of call for these methods becomes important, which means
5810 a more complicated approach. */
5811 new_main_name
= ada_main_name ();
5812 if (new_main_name
!= NULL
)
5814 set_main_name (new_main_name
, language_ada
);
5818 new_main_name
= d_main_name ();
5819 if (new_main_name
!= NULL
)
5821 set_main_name (new_main_name
, language_d
);
5825 new_main_name
= go_main_name ();
5826 if (new_main_name
!= NULL
)
5828 set_main_name (new_main_name
, language_go
);
5832 new_main_name
= pascal_main_name ();
5833 if (new_main_name
!= NULL
)
5835 set_main_name (new_main_name
, language_pascal
);
5839 /* The languages above didn't identify the name of the main procedure.
5840 Fallback to "main". */
5841 set_main_name ("main", language_unknown
);
5847 struct main_info
*info
= get_main_info ();
5849 if (info
->name_of_main
== NULL
)
5852 return info
->name_of_main
;
5855 /* Return the language of the main function. If it is not known,
5856 return language_unknown. */
5859 main_language (void)
5861 struct main_info
*info
= get_main_info ();
5863 if (info
->name_of_main
== NULL
)
5866 return info
->language_of_main
;
5869 /* Handle ``executable_changed'' events for the symtab module. */
5872 symtab_observer_executable_changed (void)
5874 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
5875 set_main_name (NULL
, language_unknown
);
5878 /* Return 1 if the supplied producer string matches the ARM RealView
5879 compiler (armcc). */
5882 producer_is_realview (const char *producer
)
5884 static const char *const arm_idents
[] = {
5885 "ARM C Compiler, ADS",
5886 "Thumb C Compiler, ADS",
5887 "ARM C++ Compiler, ADS",
5888 "Thumb C++ Compiler, ADS",
5889 "ARM/Thumb C/C++ Compiler, RVCT",
5890 "ARM C/C++ Compiler, RVCT"
5894 if (producer
== NULL
)
5897 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
5898 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
5906 /* The next index to hand out in response to a registration request. */
5908 static int next_aclass_value
= LOC_FINAL_VALUE
;
5910 /* The maximum number of "aclass" registrations we support. This is
5911 constant for convenience. */
5912 #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
5914 /* The objects representing the various "aclass" values. The elements
5915 from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
5916 elements are those registered at gdb initialization time. */
5918 static struct symbol_impl symbol_impl
[MAX_SYMBOL_IMPLS
];
5920 /* The globally visible pointer. This is separate from 'symbol_impl'
5921 so that it can be const. */
5923 const struct symbol_impl
*symbol_impls
= &symbol_impl
[0];
5925 /* Make sure we saved enough room in struct symbol. */
5927 gdb_static_assert (MAX_SYMBOL_IMPLS
<= (1 << SYMBOL_ACLASS_BITS
));
5929 /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS
5930 is the ops vector associated with this index. This returns the new
5931 index, which should be used as the aclass_index field for symbols
5935 register_symbol_computed_impl (enum address_class aclass
,
5936 const struct symbol_computed_ops
*ops
)
5938 int result
= next_aclass_value
++;
5940 gdb_assert (aclass
== LOC_COMPUTED
);
5941 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5942 symbol_impl
[result
].aclass
= aclass
;
5943 symbol_impl
[result
].ops_computed
= ops
;
5945 /* Sanity check OPS. */
5946 gdb_assert (ops
!= NULL
);
5947 gdb_assert (ops
->tracepoint_var_ref
!= NULL
);
5948 gdb_assert (ops
->describe_location
!= NULL
);
5949 gdb_assert (ops
->read_needs_frame
!= NULL
);
5950 gdb_assert (ops
->read_variable
!= NULL
);
5955 /* Register a function with frame base type. ACLASS must be LOC_BLOCK.
5956 OPS is the ops vector associated with this index. This returns the
5957 new index, which should be used as the aclass_index field for symbols
5961 register_symbol_block_impl (enum address_class aclass
,
5962 const struct symbol_block_ops
*ops
)
5964 int result
= next_aclass_value
++;
5966 gdb_assert (aclass
== LOC_BLOCK
);
5967 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5968 symbol_impl
[result
].aclass
= aclass
;
5969 symbol_impl
[result
].ops_block
= ops
;
5971 /* Sanity check OPS. */
5972 gdb_assert (ops
!= NULL
);
5973 gdb_assert (ops
->find_frame_base_location
!= NULL
);
5978 /* Register a register symbol type. ACLASS must be LOC_REGISTER or
5979 LOC_REGPARM_ADDR. OPS is the register ops vector associated with
5980 this index. This returns the new index, which should be used as
5981 the aclass_index field for symbols of this type. */
5984 register_symbol_register_impl (enum address_class aclass
,
5985 const struct symbol_register_ops
*ops
)
5987 int result
= next_aclass_value
++;
5989 gdb_assert (aclass
== LOC_REGISTER
|| aclass
== LOC_REGPARM_ADDR
);
5990 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
5991 symbol_impl
[result
].aclass
= aclass
;
5992 symbol_impl
[result
].ops_register
= ops
;
5997 /* Initialize elements of 'symbol_impl' for the constants in enum
6001 initialize_ordinary_address_classes (void)
6005 for (i
= 0; i
< LOC_FINAL_VALUE
; ++i
)
6006 symbol_impl
[i
].aclass
= i
;
6011 /* Helper function to initialize the fields of an objfile-owned symbol.
6012 It assumed that *SYM is already all zeroes. */
6015 initialize_objfile_symbol_1 (struct symbol
*sym
)
6017 SYMBOL_OBJFILE_OWNED (sym
) = 1;
6018 SYMBOL_SECTION (sym
) = -1;
6021 /* Initialize the symbol SYM, and mark it as being owned by an objfile. */
6024 initialize_objfile_symbol (struct symbol
*sym
)
6026 memset (sym
, 0, sizeof (*sym
));
6027 initialize_objfile_symbol_1 (sym
);
6030 /* Allocate and initialize a new 'struct symbol' on OBJFILE's
6034 allocate_symbol (struct objfile
*objfile
)
6036 struct symbol
*result
;
6038 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6039 initialize_objfile_symbol_1 (result
);
6044 /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
6047 struct template_symbol
*
6048 allocate_template_symbol (struct objfile
*objfile
)
6050 struct template_symbol
*result
;
6052 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct template_symbol
);
6053 initialize_objfile_symbol_1 (&result
->base
);
6061 symbol_objfile (const struct symbol
*symbol
)
6063 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6064 return SYMTAB_OBJFILE (symbol
->owner
.symtab
);
6070 symbol_arch (const struct symbol
*symbol
)
6072 if (!SYMBOL_OBJFILE_OWNED (symbol
))
6073 return symbol
->owner
.arch
;
6074 return get_objfile_arch (SYMTAB_OBJFILE (symbol
->owner
.symtab
));
6080 symbol_symtab (const struct symbol
*symbol
)
6082 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6083 return symbol
->owner
.symtab
;
6089 symbol_set_symtab (struct symbol
*symbol
, struct symtab
*symtab
)
6091 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6092 symbol
->owner
.symtab
= symtab
;
6098 _initialize_symtab (void)
6100 initialize_ordinary_address_classes ();
6103 = register_program_space_data_with_cleanup (NULL
, main_info_cleanup
);
6106 = register_program_space_data_with_cleanup (NULL
, symbol_cache_cleanup
);
6108 add_info ("variables", variables_info
, _("\
6109 All global and static variable names, or those matching REGEXP."));
6111 add_com ("whereis", class_info
, variables_info
, _("\
6112 All global and static variable names, or those matching REGEXP."));
6114 add_info ("functions", functions_info
,
6115 _("All function names, or those matching REGEXP."));
6117 /* FIXME: This command has at least the following problems:
6118 1. It prints builtin types (in a very strange and confusing fashion).
6119 2. It doesn't print right, e.g. with
6120 typedef struct foo *FOO
6121 type_print prints "FOO" when we want to make it (in this situation)
6122 print "struct foo *".
6123 I also think "ptype" or "whatis" is more likely to be useful (but if
6124 there is much disagreement "info types" can be fixed). */
6125 add_info ("types", types_info
,
6126 _("All type names, or those matching REGEXP."));
6128 add_info ("sources", sources_info
,
6129 _("Source files in the program."));
6131 add_com ("rbreak", class_breakpoint
, rbreak_command
,
6132 _("Set a breakpoint for all functions matching REGEXP."));
6136 add_com ("lf", class_info
, sources_info
,
6137 _("Source files in the program"));
6138 add_com ("lg", class_info
, variables_info
, _("\
6139 All global and static variable names, or those matching REGEXP."));
6142 add_setshow_enum_cmd ("multiple-symbols", no_class
,
6143 multiple_symbols_modes
, &multiple_symbols_mode
,
6145 Set the debugger behavior when more than one symbol are possible matches\n\
6146 in an expression."), _("\
6147 Show how the debugger handles ambiguities in expressions."), _("\
6148 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
6149 NULL
, NULL
, &setlist
, &showlist
);
6151 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
6152 &basenames_may_differ
, _("\
6153 Set whether a source file may have multiple base names."), _("\
6154 Show whether a source file may have multiple base names."), _("\
6155 (A \"base name\" is the name of a file with the directory part removed.\n\
6156 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
6157 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
6158 before comparing them. Canonicalization is an expensive operation,\n\
6159 but it allows the same file be known by more than one base name.\n\
6160 If not set (the default), all source files are assumed to have just\n\
6161 one base name, and gdb will do file name comparisons more efficiently."),
6163 &setlist
, &showlist
);
6165 add_setshow_zuinteger_cmd ("symtab-create", no_class
, &symtab_create_debug
,
6166 _("Set debugging of symbol table creation."),
6167 _("Show debugging of symbol table creation."), _("\
6168 When enabled (non-zero), debugging messages are printed when building\n\
6169 symbol tables. A value of 1 (one) normally provides enough information.\n\
6170 A value greater than 1 provides more verbose information."),
6173 &setdebuglist
, &showdebuglist
);
6175 add_setshow_zuinteger_cmd ("symbol-lookup", no_class
, &symbol_lookup_debug
,
6177 Set debugging of symbol lookup."), _("\
6178 Show debugging of symbol lookup."), _("\
6179 When enabled (non-zero), symbol lookups are logged."),
6181 &setdebuglist
, &showdebuglist
);
6183 add_setshow_zuinteger_cmd ("symbol-cache-size", no_class
,
6184 &new_symbol_cache_size
,
6185 _("Set the size of the symbol cache."),
6186 _("Show the size of the symbol cache."), _("\
6187 The size of the symbol cache.\n\
6188 If zero then the symbol cache is disabled."),
6189 set_symbol_cache_size_handler
, NULL
,
6190 &maintenance_set_cmdlist
,
6191 &maintenance_show_cmdlist
);
6193 add_cmd ("symbol-cache", class_maintenance
, maintenance_print_symbol_cache
,
6194 _("Dump the symbol cache for each program space."),
6195 &maintenanceprintlist
);
6197 add_cmd ("symbol-cache-statistics", class_maintenance
,
6198 maintenance_print_symbol_cache_statistics
,
6199 _("Print symbol cache statistics for each program space."),
6200 &maintenanceprintlist
);
6202 add_cmd ("flush-symbol-cache", class_maintenance
,
6203 maintenance_flush_symbol_cache
,
6204 _("Flush the symbol cache for each program space."),
6207 observer_attach_executable_changed (symtab_observer_executable_changed
);
6208 observer_attach_new_objfile (symtab_new_objfile_observer
);
6209 observer_attach_free_objfile (symtab_free_objfile_observer
);