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"
63 #include "completer.h"
65 /* Forward declarations for local functions. */
67 static void rbreak_command (char *, int);
69 static int find_line_common (struct linetable
*, int, int *, int);
71 static struct symbol
*lookup_symbol_aux (const char *name
,
72 const struct block
*block
,
73 const domain_enum domain
,
74 enum language language
,
75 struct field_of_this_result
*);
78 struct symbol
*lookup_local_symbol (const char *name
,
79 const struct block
*block
,
80 const domain_enum domain
,
81 enum language language
);
83 static struct symbol
*
84 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
85 const char *name
, const domain_enum domain
);
87 extern initialize_file_ftype _initialize_symtab
;
89 /* Program space key for finding name and language of "main". */
91 static const struct program_space_data
*main_progspace_key
;
93 /* Type of the data stored on the program space. */
101 /* Language of "main". */
103 enum language language_of_main
;
106 /* Program space key for finding its symbol cache. */
108 static const struct program_space_data
*symbol_cache_key
;
110 /* The default symbol cache size.
111 There is no extra cpu cost for large N (except when flushing the cache,
112 which is rare). The value here is just a first attempt. A better default
113 value may be higher or lower. A prime number can make up for a bad hash
114 computation, so that's why the number is what it is. */
115 #define DEFAULT_SYMBOL_CACHE_SIZE 1021
117 /* The maximum symbol cache size.
118 There's no method to the decision of what value to use here, other than
119 there's no point in allowing a user typo to make gdb consume all memory. */
120 #define MAX_SYMBOL_CACHE_SIZE (1024*1024)
122 /* symbol_cache_lookup returns this if a previous lookup failed to find the
123 symbol in any objfile. */
124 #define SYMBOL_LOOKUP_FAILED ((struct symbol *) 1)
126 /* Recording lookups that don't find the symbol is just as important, if not
127 more so, than recording found symbols. */
129 enum symbol_cache_slot_state
132 SYMBOL_SLOT_NOT_FOUND
,
136 /* Symbols don't specify global vs static block.
137 So keep them in separate caches. */
139 struct block_symbol_cache
143 unsigned int collisions
;
145 /* SYMBOLS is a variable length array of this size.
146 One can imagine that in general one cache (global/static) should be a
147 fraction of the size of the other, but there's no data at the moment
148 on which to decide. */
151 struct symbol_cache_slot
153 enum symbol_cache_slot_state state
;
155 /* The objfile that was current when the symbol was looked up.
156 This is only needed for global blocks, but for simplicity's sake
157 we allocate the space for both. If data shows the extra space used
158 for static blocks is a problem, we can split things up then.
160 Global blocks need cache lookup to include the objfile context because
161 we need to account for gdbarch_iterate_over_objfiles_in_search_order
162 which can traverse objfiles in, effectively, any order, depending on
163 the current objfile, thus affecting which symbol is found. Normally,
164 only the current objfile is searched first, and then the rest are
165 searched in recorded order; but putting cache lookup inside
166 gdbarch_iterate_over_objfiles_in_search_order would be awkward.
167 Instead we just make the current objfile part of the context of
168 cache lookup. This means we can record the same symbol multiple times,
169 each with a different "current objfile" that was in effect when the
170 lookup was saved in the cache, but cache space is pretty cheap. */
171 const struct objfile
*objfile_context
;
175 struct symbol
*found
;
187 Searching for symbols in the static and global blocks over multiple objfiles
188 again and again can be slow, as can searching very big objfiles. This is a
189 simple cache to improve symbol lookup performance, which is critical to
190 overall gdb performance.
192 Symbols are hashed on the name, its domain, and block.
193 They are also hashed on their objfile for objfile-specific lookups. */
197 struct block_symbol_cache
*global_symbols
;
198 struct block_symbol_cache
*static_symbols
;
201 /* When non-zero, print debugging messages related to symtab creation. */
202 unsigned int symtab_create_debug
= 0;
204 /* When non-zero, print debugging messages related to symbol lookup. */
205 unsigned int symbol_lookup_debug
= 0;
207 /* The size of the cache is staged here. */
208 static unsigned int new_symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
210 /* The current value of the symbol cache size.
211 This is saved so that if the user enters a value too big we can restore
212 the original value from here. */
213 static unsigned int symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
215 /* Non-zero if a file may be known by two different basenames.
216 This is the uncommon case, and significantly slows down gdb.
217 Default set to "off" to not slow down the common case. */
218 int basenames_may_differ
= 0;
220 /* Allow the user to configure the debugger behavior with respect
221 to multiple-choice menus when more than one symbol matches during
224 const char multiple_symbols_ask
[] = "ask";
225 const char multiple_symbols_all
[] = "all";
226 const char multiple_symbols_cancel
[] = "cancel";
227 static const char *const multiple_symbols_modes
[] =
229 multiple_symbols_ask
,
230 multiple_symbols_all
,
231 multiple_symbols_cancel
,
234 static const char *multiple_symbols_mode
= multiple_symbols_all
;
236 /* Read-only accessor to AUTO_SELECT_MODE. */
239 multiple_symbols_select_mode (void)
241 return multiple_symbols_mode
;
244 /* Block in which the most recently searched-for symbol was found.
245 Might be better to make this a parameter to lookup_symbol and
248 const struct block
*block_found
;
250 /* Return the name of a domain_enum. */
253 domain_name (domain_enum e
)
257 case UNDEF_DOMAIN
: return "UNDEF_DOMAIN";
258 case VAR_DOMAIN
: return "VAR_DOMAIN";
259 case STRUCT_DOMAIN
: return "STRUCT_DOMAIN";
260 case MODULE_DOMAIN
: return "MODULE_DOMAIN";
261 case LABEL_DOMAIN
: return "LABEL_DOMAIN";
262 case COMMON_BLOCK_DOMAIN
: return "COMMON_BLOCK_DOMAIN";
263 default: gdb_assert_not_reached ("bad domain_enum");
267 /* Return the name of a search_domain . */
270 search_domain_name (enum search_domain e
)
274 case VARIABLES_DOMAIN
: return "VARIABLES_DOMAIN";
275 case FUNCTIONS_DOMAIN
: return "FUNCTIONS_DOMAIN";
276 case TYPES_DOMAIN
: return "TYPES_DOMAIN";
277 case ALL_DOMAIN
: return "ALL_DOMAIN";
278 default: gdb_assert_not_reached ("bad search_domain");
285 compunit_primary_filetab (const struct compunit_symtab
*cust
)
287 gdb_assert (COMPUNIT_FILETABS (cust
) != NULL
);
289 /* The primary file symtab is the first one in the list. */
290 return COMPUNIT_FILETABS (cust
);
296 compunit_language (const struct compunit_symtab
*cust
)
298 struct symtab
*symtab
= compunit_primary_filetab (cust
);
300 /* The language of the compunit symtab is the language of its primary
302 return SYMTAB_LANGUAGE (symtab
);
305 /* See whether FILENAME matches SEARCH_NAME using the rule that we
306 advertise to the user. (The manual's description of linespecs
307 describes what we advertise). Returns true if they match, false
311 compare_filenames_for_search (const char *filename
, const char *search_name
)
313 int len
= strlen (filename
);
314 size_t search_len
= strlen (search_name
);
316 if (len
< search_len
)
319 /* The tail of FILENAME must match. */
320 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
323 /* Either the names must completely match, or the character
324 preceding the trailing SEARCH_NAME segment of FILENAME must be a
327 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
328 cannot match FILENAME "/path//dir/file.c" - as user has requested
329 absolute path. The sama applies for "c:\file.c" possibly
330 incorrectly hypothetically matching "d:\dir\c:\file.c".
332 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
333 compatible with SEARCH_NAME "file.c". In such case a compiler had
334 to put the "c:file.c" name into debug info. Such compatibility
335 works only on GDB built for DOS host. */
336 return (len
== search_len
337 || (!IS_ABSOLUTE_PATH (search_name
)
338 && IS_DIR_SEPARATOR (filename
[len
- search_len
- 1]))
339 || (HAS_DRIVE_SPEC (filename
)
340 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
343 /* Check for a symtab of a specific name by searching some symtabs.
344 This is a helper function for callbacks of iterate_over_symtabs.
346 If NAME is not absolute, then REAL_PATH is NULL
347 If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME.
349 The return value, NAME, REAL_PATH, CALLBACK, and DATA
350 are identical to the `map_symtabs_matching_filename' method of
351 quick_symbol_functions.
353 FIRST and AFTER_LAST indicate the range of compunit symtabs to search.
354 Each symtab within the specified compunit symtab is also searched.
355 AFTER_LAST is one past the last compunit symtab to search; NULL means to
356 search until the end of the list. */
359 iterate_over_some_symtabs (const char *name
,
360 const char *real_path
,
361 int (*callback
) (struct symtab
*symtab
,
364 struct compunit_symtab
*first
,
365 struct compunit_symtab
*after_last
)
367 struct compunit_symtab
*cust
;
369 const char* base_name
= lbasename (name
);
371 for (cust
= first
; cust
!= NULL
&& cust
!= after_last
; cust
= cust
->next
)
373 ALL_COMPUNIT_FILETABS (cust
, s
)
375 if (compare_filenames_for_search (s
->filename
, name
))
377 if (callback (s
, data
))
382 /* Before we invoke realpath, which can get expensive when many
383 files are involved, do a quick comparison of the basenames. */
384 if (! basenames_may_differ
385 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
388 if (compare_filenames_for_search (symtab_to_fullname (s
), name
))
390 if (callback (s
, data
))
395 /* If the user gave us an absolute path, try to find the file in
396 this symtab and use its absolute path. */
397 if (real_path
!= NULL
)
399 const char *fullname
= symtab_to_fullname (s
);
401 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
402 gdb_assert (IS_ABSOLUTE_PATH (name
));
403 if (FILENAME_CMP (real_path
, fullname
) == 0)
405 if (callback (s
, data
))
416 /* Check for a symtab of a specific name; first in symtabs, then in
417 psymtabs. *If* there is no '/' in the name, a match after a '/'
418 in the symtab filename will also work.
420 Calls CALLBACK with each symtab that is found and with the supplied
421 DATA. If CALLBACK returns true, the search stops. */
424 iterate_over_symtabs (const char *name
,
425 int (*callback
) (struct symtab
*symtab
,
429 struct objfile
*objfile
;
430 char *real_path
= NULL
;
431 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
433 /* Here we are interested in canonicalizing an absolute path, not
434 absolutizing a relative path. */
435 if (IS_ABSOLUTE_PATH (name
))
437 real_path
= gdb_realpath (name
);
438 make_cleanup (xfree
, real_path
);
439 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
442 ALL_OBJFILES (objfile
)
444 if (iterate_over_some_symtabs (name
, real_path
, callback
, data
,
445 objfile
->compunit_symtabs
, NULL
))
447 do_cleanups (cleanups
);
452 /* Same search rules as above apply here, but now we look thru the
455 ALL_OBJFILES (objfile
)
458 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
464 do_cleanups (cleanups
);
469 do_cleanups (cleanups
);
472 /* The callback function used by lookup_symtab. */
475 lookup_symtab_callback (struct symtab
*symtab
, void *data
)
477 struct symtab
**result_ptr
= data
;
479 *result_ptr
= symtab
;
483 /* A wrapper for iterate_over_symtabs that returns the first matching
487 lookup_symtab (const char *name
)
489 struct symtab
*result
= NULL
;
491 iterate_over_symtabs (name
, lookup_symtab_callback
, &result
);
496 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
497 full method name, which consist of the class name (from T), the unadorned
498 method name from METHOD_ID, and the signature for the specific overload,
499 specified by SIGNATURE_ID. Note that this function is g++ specific. */
502 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
504 int mangled_name_len
;
506 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
507 struct fn_field
*method
= &f
[signature_id
];
508 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
509 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
510 const char *newname
= type_name_no_tag (type
);
512 /* Does the form of physname indicate that it is the full mangled name
513 of a constructor (not just the args)? */
514 int is_full_physname_constructor
;
517 int is_destructor
= is_destructor_name (physname
);
518 /* Need a new type prefix. */
519 char *const_prefix
= method
->is_const
? "C" : "";
520 char *volatile_prefix
= method
->is_volatile
? "V" : "";
522 int len
= (newname
== NULL
? 0 : strlen (newname
));
524 /* Nothing to do if physname already contains a fully mangled v3 abi name
525 or an operator name. */
526 if ((physname
[0] == '_' && physname
[1] == 'Z')
527 || is_operator_name (field_name
))
528 return xstrdup (physname
);
530 is_full_physname_constructor
= is_constructor_name (physname
);
532 is_constructor
= is_full_physname_constructor
533 || (newname
&& strcmp (field_name
, newname
) == 0);
536 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
538 if (is_destructor
|| is_full_physname_constructor
)
540 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
541 strcpy (mangled_name
, physname
);
547 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
549 else if (physname
[0] == 't' || physname
[0] == 'Q')
551 /* The physname for template and qualified methods already includes
553 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
559 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
560 volatile_prefix
, len
);
562 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
563 + strlen (buf
) + len
+ strlen (physname
) + 1);
565 mangled_name
= (char *) xmalloc (mangled_name_len
);
567 mangled_name
[0] = '\0';
569 strcpy (mangled_name
, field_name
);
571 strcat (mangled_name
, buf
);
572 /* If the class doesn't have a name, i.e. newname NULL, then we just
573 mangle it using 0 for the length of the class. Thus it gets mangled
574 as something starting with `::' rather than `classname::'. */
576 strcat (mangled_name
, newname
);
578 strcat (mangled_name
, physname
);
579 return (mangled_name
);
582 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
583 correctly allocated. */
586 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
588 struct obstack
*obstack
)
590 if (gsymbol
->language
== language_ada
)
594 gsymbol
->ada_mangled
= 0;
595 gsymbol
->language_specific
.obstack
= obstack
;
599 gsymbol
->ada_mangled
= 1;
600 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
604 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
607 /* Return the demangled name of GSYMBOL. */
610 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
612 if (gsymbol
->language
== language_ada
)
614 if (!gsymbol
->ada_mangled
)
619 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
623 /* Initialize the language dependent portion of a symbol
624 depending upon the language for the symbol. */
627 symbol_set_language (struct general_symbol_info
*gsymbol
,
628 enum language language
,
629 struct obstack
*obstack
)
631 gsymbol
->language
= language
;
632 if (gsymbol
->language
== language_cplus
633 || gsymbol
->language
== language_d
634 || gsymbol
->language
== language_go
635 || gsymbol
->language
== language_java
636 || gsymbol
->language
== language_objc
637 || gsymbol
->language
== language_fortran
)
639 symbol_set_demangled_name (gsymbol
, NULL
, obstack
);
641 else if (gsymbol
->language
== language_ada
)
643 gdb_assert (gsymbol
->ada_mangled
== 0);
644 gsymbol
->language_specific
.obstack
= obstack
;
648 memset (&gsymbol
->language_specific
, 0,
649 sizeof (gsymbol
->language_specific
));
653 /* Functions to initialize a symbol's mangled name. */
655 /* Objects of this type are stored in the demangled name hash table. */
656 struct demangled_name_entry
662 /* Hash function for the demangled name hash. */
665 hash_demangled_name_entry (const void *data
)
667 const struct demangled_name_entry
*e
= data
;
669 return htab_hash_string (e
->mangled
);
672 /* Equality function for the demangled name hash. */
675 eq_demangled_name_entry (const void *a
, const void *b
)
677 const struct demangled_name_entry
*da
= a
;
678 const struct demangled_name_entry
*db
= b
;
680 return strcmp (da
->mangled
, db
->mangled
) == 0;
683 /* Create the hash table used for demangled names. Each hash entry is
684 a pair of strings; one for the mangled name and one for the demangled
685 name. The entry is hashed via just the mangled name. */
688 create_demangled_names_hash (struct objfile
*objfile
)
690 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
691 The hash table code will round this up to the next prime number.
692 Choosing a much larger table size wastes memory, and saves only about
693 1% in symbol reading. */
695 objfile
->per_bfd
->demangled_names_hash
= htab_create_alloc
696 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
697 NULL
, xcalloc
, xfree
);
700 /* Try to determine the demangled name for a symbol, based on the
701 language of that symbol. If the language is set to language_auto,
702 it will attempt to find any demangling algorithm that works and
703 then set the language appropriately. The returned name is allocated
704 by the demangler and should be xfree'd. */
707 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
710 char *demangled
= NULL
;
712 if (gsymbol
->language
== language_unknown
)
713 gsymbol
->language
= language_auto
;
715 if (gsymbol
->language
== language_objc
716 || gsymbol
->language
== language_auto
)
719 objc_demangle (mangled
, 0);
720 if (demangled
!= NULL
)
722 gsymbol
->language
= language_objc
;
726 if (gsymbol
->language
== language_cplus
727 || gsymbol
->language
== language_auto
)
730 gdb_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
731 if (demangled
!= NULL
)
733 gsymbol
->language
= language_cplus
;
737 if (gsymbol
->language
== language_java
)
740 gdb_demangle (mangled
,
741 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
742 if (demangled
!= NULL
)
744 gsymbol
->language
= language_java
;
748 if (gsymbol
->language
== language_d
749 || gsymbol
->language
== language_auto
)
751 demangled
= d_demangle(mangled
, 0);
752 if (demangled
!= NULL
)
754 gsymbol
->language
= language_d
;
758 /* FIXME(dje): Continually adding languages here is clumsy.
759 Better to just call la_demangle if !auto, and if auto then call
760 a utility routine that tries successive languages in turn and reports
761 which one it finds. I realize the la_demangle options may be different
762 for different languages but there's already a FIXME for that. */
763 if (gsymbol
->language
== language_go
764 || gsymbol
->language
== language_auto
)
766 demangled
= go_demangle (mangled
, 0);
767 if (demangled
!= NULL
)
769 gsymbol
->language
= language_go
;
774 /* We could support `gsymbol->language == language_fortran' here to provide
775 module namespaces also for inferiors with only minimal symbol table (ELF
776 symbols). Just the mangling standard is not standardized across compilers
777 and there is no DW_AT_producer available for inferiors with only the ELF
778 symbols to check the mangling kind. */
780 /* Check for Ada symbols last. See comment below explaining why. */
782 if (gsymbol
->language
== language_auto
)
784 const char *demangled
= ada_decode (mangled
);
786 if (demangled
!= mangled
&& demangled
!= NULL
&& demangled
[0] != '<')
788 /* Set the gsymbol language to Ada, but still return NULL.
789 Two reasons for that:
791 1. For Ada, we prefer computing the symbol's decoded name
792 on the fly rather than pre-compute it, in order to save
793 memory (Ada projects are typically very large).
795 2. There are some areas in the definition of the GNAT
796 encoding where, with a bit of bad luck, we might be able
797 to decode a non-Ada symbol, generating an incorrect
798 demangled name (Eg: names ending with "TB" for instance
799 are identified as task bodies and so stripped from
800 the decoded name returned).
802 Returning NULL, here, helps us get a little bit of
803 the best of both worlds. Because we're last, we should
804 not affect any of the other languages that were able to
805 demangle the symbol before us; we get to correctly tag
806 Ada symbols as such; and even if we incorrectly tagged
807 a non-Ada symbol, which should be rare, any routing
808 through the Ada language should be transparent (Ada
809 tries to behave much like C/C++ with non-Ada symbols). */
810 gsymbol
->language
= language_ada
;
818 /* Set both the mangled and demangled (if any) names for GSYMBOL based
819 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
820 objfile's obstack; but if COPY_NAME is 0 and if NAME is
821 NUL-terminated, then this function assumes that NAME is already
822 correctly saved (either permanently or with a lifetime tied to the
823 objfile), and it will not be copied.
825 The hash table corresponding to OBJFILE is used, and the memory
826 comes from the per-BFD storage_obstack. LINKAGE_NAME is copied,
827 so the pointer can be discarded after calling this function. */
829 /* We have to be careful when dealing with Java names: when we run
830 into a Java minimal symbol, we don't know it's a Java symbol, so it
831 gets demangled as a C++ name. This is unfortunate, but there's not
832 much we can do about it: but when demangling partial symbols and
833 regular symbols, we'd better not reuse the wrong demangled name.
834 (See PR gdb/1039.) We solve this by putting a distinctive prefix
835 on Java names when storing them in the hash table. */
837 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
838 don't mind the Java prefix so much: different languages have
839 different demangling requirements, so it's only natural that we
840 need to keep language data around in our demangling cache. But
841 it's not good that the minimal symbol has the wrong demangled name.
842 Unfortunately, I can't think of any easy solution to that
845 #define JAVA_PREFIX "##JAVA$$"
846 #define JAVA_PREFIX_LEN 8
849 symbol_set_names (struct general_symbol_info
*gsymbol
,
850 const char *linkage_name
, int len
, int copy_name
,
851 struct objfile
*objfile
)
853 struct demangled_name_entry
**slot
;
854 /* A 0-terminated copy of the linkage name. */
855 const char *linkage_name_copy
;
856 /* A copy of the linkage name that might have a special Java prefix
857 added to it, for use when looking names up in the hash table. */
858 const char *lookup_name
;
859 /* The length of lookup_name. */
861 struct demangled_name_entry entry
;
862 struct objfile_per_bfd_storage
*per_bfd
= objfile
->per_bfd
;
864 if (gsymbol
->language
== language_ada
)
866 /* In Ada, we do the symbol lookups using the mangled name, so
867 we can save some space by not storing the demangled name.
869 As a side note, we have also observed some overlap between
870 the C++ mangling and Ada mangling, similarly to what has
871 been observed with Java. Because we don't store the demangled
872 name with the symbol, we don't need to use the same trick
875 gsymbol
->name
= linkage_name
;
878 char *name
= obstack_alloc (&per_bfd
->storage_obstack
, len
+ 1);
880 memcpy (name
, linkage_name
, len
);
882 gsymbol
->name
= name
;
884 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
889 if (per_bfd
->demangled_names_hash
== NULL
)
890 create_demangled_names_hash (objfile
);
892 /* The stabs reader generally provides names that are not
893 NUL-terminated; most of the other readers don't do this, so we
894 can just use the given copy, unless we're in the Java case. */
895 if (gsymbol
->language
== language_java
)
899 lookup_len
= len
+ JAVA_PREFIX_LEN
;
900 alloc_name
= alloca (lookup_len
+ 1);
901 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
902 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
903 alloc_name
[lookup_len
] = '\0';
905 lookup_name
= alloc_name
;
906 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
908 else if (linkage_name
[len
] != '\0')
913 alloc_name
= alloca (lookup_len
+ 1);
914 memcpy (alloc_name
, linkage_name
, len
);
915 alloc_name
[lookup_len
] = '\0';
917 lookup_name
= alloc_name
;
918 linkage_name_copy
= alloc_name
;
923 lookup_name
= linkage_name
;
924 linkage_name_copy
= linkage_name
;
927 entry
.mangled
= lookup_name
;
928 slot
= ((struct demangled_name_entry
**)
929 htab_find_slot (per_bfd
->demangled_names_hash
,
932 /* If this name is not in the hash table, add it. */
934 /* A C version of the symbol may have already snuck into the table.
935 This happens to, e.g., main.init (__go_init_main). Cope. */
936 || (gsymbol
->language
== language_go
937 && (*slot
)->demangled
[0] == '\0'))
939 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
941 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
943 /* Suppose we have demangled_name==NULL, copy_name==0, and
944 lookup_name==linkage_name. In this case, we already have the
945 mangled name saved, and we don't have a demangled name. So,
946 you might think we could save a little space by not recording
947 this in the hash table at all.
949 It turns out that it is actually important to still save such
950 an entry in the hash table, because storing this name gives
951 us better bcache hit rates for partial symbols. */
952 if (!copy_name
&& lookup_name
== linkage_name
)
954 *slot
= obstack_alloc (&per_bfd
->storage_obstack
,
955 offsetof (struct demangled_name_entry
,
957 + demangled_len
+ 1);
958 (*slot
)->mangled
= lookup_name
;
964 /* If we must copy the mangled name, put it directly after
965 the demangled name so we can have a single
967 *slot
= obstack_alloc (&per_bfd
->storage_obstack
,
968 offsetof (struct demangled_name_entry
,
970 + lookup_len
+ demangled_len
+ 2);
971 mangled_ptr
= &((*slot
)->demangled
[demangled_len
+ 1]);
972 strcpy (mangled_ptr
, lookup_name
);
973 (*slot
)->mangled
= mangled_ptr
;
976 if (demangled_name
!= NULL
)
978 strcpy ((*slot
)->demangled
, demangled_name
);
979 xfree (demangled_name
);
982 (*slot
)->demangled
[0] = '\0';
985 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
986 if ((*slot
)->demangled
[0] != '\0')
987 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
,
988 &per_bfd
->storage_obstack
);
990 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
993 /* Return the source code name of a symbol. In languages where
994 demangling is necessary, this is the demangled name. */
997 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
999 switch (gsymbol
->language
)
1001 case language_cplus
:
1006 case language_fortran
:
1007 if (symbol_get_demangled_name (gsymbol
) != NULL
)
1008 return symbol_get_demangled_name (gsymbol
);
1011 return ada_decode_symbol (gsymbol
);
1015 return gsymbol
->name
;
1018 /* Return the demangled name for a symbol based on the language for
1019 that symbol. If no demangled name exists, return NULL. */
1022 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
1024 const char *dem_name
= NULL
;
1026 switch (gsymbol
->language
)
1028 case language_cplus
:
1033 case language_fortran
:
1034 dem_name
= symbol_get_demangled_name (gsymbol
);
1037 dem_name
= ada_decode_symbol (gsymbol
);
1045 /* Return the search name of a symbol---generally the demangled or
1046 linkage name of the symbol, depending on how it will be searched for.
1047 If there is no distinct demangled name, then returns the same value
1048 (same pointer) as SYMBOL_LINKAGE_NAME. */
1051 symbol_search_name (const struct general_symbol_info
*gsymbol
)
1053 if (gsymbol
->language
== language_ada
)
1054 return gsymbol
->name
;
1056 return symbol_natural_name (gsymbol
);
1059 /* Initialize the structure fields to zero values. */
1062 init_sal (struct symtab_and_line
*sal
)
1064 memset (sal
, 0, sizeof (*sal
));
1068 /* Return 1 if the two sections are the same, or if they could
1069 plausibly be copies of each other, one in an original object
1070 file and another in a separated debug file. */
1073 matching_obj_sections (struct obj_section
*obj_first
,
1074 struct obj_section
*obj_second
)
1076 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
1077 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
1078 struct objfile
*obj
;
1080 /* If they're the same section, then they match. */
1081 if (first
== second
)
1084 /* If either is NULL, give up. */
1085 if (first
== NULL
|| second
== NULL
)
1088 /* This doesn't apply to absolute symbols. */
1089 if (first
->owner
== NULL
|| second
->owner
== NULL
)
1092 /* If they're in the same object file, they must be different sections. */
1093 if (first
->owner
== second
->owner
)
1096 /* Check whether the two sections are potentially corresponding. They must
1097 have the same size, address, and name. We can't compare section indexes,
1098 which would be more reliable, because some sections may have been
1100 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
1103 /* In-memory addresses may start at a different offset, relativize them. */
1104 if (bfd_get_section_vma (first
->owner
, first
)
1105 - bfd_get_start_address (first
->owner
)
1106 != bfd_get_section_vma (second
->owner
, second
)
1107 - bfd_get_start_address (second
->owner
))
1110 if (bfd_get_section_name (first
->owner
, first
) == NULL
1111 || bfd_get_section_name (second
->owner
, second
) == NULL
1112 || strcmp (bfd_get_section_name (first
->owner
, first
),
1113 bfd_get_section_name (second
->owner
, second
)) != 0)
1116 /* Otherwise check that they are in corresponding objfiles. */
1119 if (obj
->obfd
== first
->owner
)
1121 gdb_assert (obj
!= NULL
);
1123 if (obj
->separate_debug_objfile
!= NULL
1124 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
1126 if (obj
->separate_debug_objfile_backlink
!= NULL
1127 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
1136 expand_symtab_containing_pc (CORE_ADDR pc
, struct obj_section
*section
)
1138 struct objfile
*objfile
;
1139 struct bound_minimal_symbol msymbol
;
1141 /* If we know that this is not a text address, return failure. This is
1142 necessary because we loop based on texthigh and textlow, which do
1143 not include the data ranges. */
1144 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1146 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
1147 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
1148 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
1149 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
1150 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
1153 ALL_OBJFILES (objfile
)
1155 struct compunit_symtab
*cust
= NULL
;
1158 cust
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
, msymbol
,
1165 /* Hash function for the symbol cache. */
1168 hash_symbol_entry (const struct objfile
*objfile_context
,
1169 const char *name
, domain_enum domain
)
1171 unsigned int hash
= (uintptr_t) objfile_context
;
1174 hash
+= htab_hash_string (name
);
1181 /* Equality function for the symbol cache. */
1184 eq_symbol_entry (const struct symbol_cache_slot
*slot
,
1185 const struct objfile
*objfile_context
,
1186 const char *name
, domain_enum domain
)
1188 const char *slot_name
;
1189 domain_enum slot_domain
;
1191 if (slot
->state
== SYMBOL_SLOT_UNUSED
)
1194 if (slot
->objfile_context
!= objfile_context
)
1197 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1199 slot_name
= slot
->value
.not_found
.name
;
1200 slot_domain
= slot
->value
.not_found
.domain
;
1204 slot_name
= SYMBOL_SEARCH_NAME (slot
->value
.found
);
1205 slot_domain
= SYMBOL_DOMAIN (slot
->value
.found
);
1208 /* NULL names match. */
1209 if (slot_name
== NULL
&& name
== NULL
)
1211 /* But there's no point in calling symbol_matches_domain in the
1212 SYMBOL_SLOT_FOUND case. */
1213 if (slot_domain
!= domain
)
1216 else if (slot_name
!= NULL
&& name
!= NULL
)
1218 /* It's important that we use the same comparison that was done the
1219 first time through. If the slot records a found symbol, then this
1220 means using strcmp_iw on SYMBOL_SEARCH_NAME. See dictionary.c.
1221 It also means using symbol_matches_domain for found symbols.
1224 If the slot records a not-found symbol, then require a precise match.
1225 We could still be lax with whitespace like strcmp_iw though. */
1227 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1229 if (strcmp (slot_name
, name
) != 0)
1231 if (slot_domain
!= domain
)
1236 struct symbol
*sym
= slot
->value
.found
;
1238 if (strcmp_iw (slot_name
, name
) != 0)
1240 if (!symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1241 slot_domain
, domain
))
1247 /* Only one name is NULL. */
1254 /* Given a cache of size SIZE, return the size of the struct (with variable
1255 length array) in bytes. */
1258 symbol_cache_byte_size (unsigned int size
)
1260 return (sizeof (struct block_symbol_cache
)
1261 + ((size
- 1) * sizeof (struct symbol_cache_slot
)));
1267 resize_symbol_cache (struct symbol_cache
*cache
, unsigned int new_size
)
1269 /* If there's no change in size, don't do anything.
1270 All caches have the same size, so we can just compare with the size
1271 of the global symbols cache. */
1272 if ((cache
->global_symbols
!= NULL
1273 && cache
->global_symbols
->size
== new_size
)
1274 || (cache
->global_symbols
== NULL
1278 xfree (cache
->global_symbols
);
1279 xfree (cache
->static_symbols
);
1283 cache
->global_symbols
= NULL
;
1284 cache
->static_symbols
= NULL
;
1288 size_t total_size
= symbol_cache_byte_size (new_size
);
1290 cache
->global_symbols
= xcalloc (1, total_size
);
1291 cache
->static_symbols
= xcalloc (1, total_size
);
1292 cache
->global_symbols
->size
= new_size
;
1293 cache
->static_symbols
->size
= new_size
;
1297 /* Make a symbol cache of size SIZE. */
1299 static struct symbol_cache
*
1300 make_symbol_cache (unsigned int size
)
1302 struct symbol_cache
*cache
;
1304 cache
= XCNEW (struct symbol_cache
);
1305 resize_symbol_cache (cache
, symbol_cache_size
);
1309 /* Free the space used by CACHE. */
1312 free_symbol_cache (struct symbol_cache
*cache
)
1314 xfree (cache
->global_symbols
);
1315 xfree (cache
->static_symbols
);
1319 /* Return the symbol cache of PSPACE.
1320 Create one if it doesn't exist yet. */
1322 static struct symbol_cache
*
1323 get_symbol_cache (struct program_space
*pspace
)
1325 struct symbol_cache
*cache
= program_space_data (pspace
, symbol_cache_key
);
1329 cache
= make_symbol_cache (symbol_cache_size
);
1330 set_program_space_data (pspace
, symbol_cache_key
, cache
);
1336 /* Delete the symbol cache of PSPACE.
1337 Called when PSPACE is destroyed. */
1340 symbol_cache_cleanup (struct program_space
*pspace
, void *data
)
1342 struct symbol_cache
*cache
= data
;
1344 free_symbol_cache (cache
);
1347 /* Set the size of the symbol cache in all program spaces. */
1350 set_symbol_cache_size (unsigned int new_size
)
1352 struct program_space
*pspace
;
1354 ALL_PSPACES (pspace
)
1356 struct symbol_cache
*cache
1357 = program_space_data (pspace
, symbol_cache_key
);
1359 /* The pspace could have been created but not have a cache yet. */
1361 resize_symbol_cache (cache
, new_size
);
1365 /* Called when symbol-cache-size is set. */
1368 set_symbol_cache_size_handler (char *args
, int from_tty
,
1369 struct cmd_list_element
*c
)
1371 if (new_symbol_cache_size
> MAX_SYMBOL_CACHE_SIZE
)
1373 /* Restore the previous value.
1374 This is the value the "show" command prints. */
1375 new_symbol_cache_size
= symbol_cache_size
;
1377 error (_("Symbol cache size is too large, max is %u."),
1378 MAX_SYMBOL_CACHE_SIZE
);
1380 symbol_cache_size
= new_symbol_cache_size
;
1382 set_symbol_cache_size (symbol_cache_size
);
1385 /* Lookup symbol NAME,DOMAIN in BLOCK in the symbol cache of PSPACE.
1386 OBJFILE_CONTEXT is the current objfile, which may be NULL.
1387 The result is the symbol if found, SYMBOL_LOOKUP_FAILED if a previous lookup
1388 failed (and thus this one will too), or NULL if the symbol is not present
1390 *BSC_PTR, *SLOT_PTR are set to the cache and slot of the symbol, whether
1391 found or not found. */
1393 static struct symbol
*
1394 symbol_cache_lookup (struct symbol_cache
*cache
,
1395 struct objfile
*objfile_context
, int block
,
1396 const char *name
, domain_enum domain
,
1397 struct block_symbol_cache
**bsc_ptr
,
1398 struct symbol_cache_slot
**slot_ptr
)
1400 struct block_symbol_cache
*bsc
;
1402 struct symbol_cache_slot
*slot
;
1404 if (block
== GLOBAL_BLOCK
)
1405 bsc
= cache
->global_symbols
;
1407 bsc
= cache
->static_symbols
;
1415 hash
= hash_symbol_entry (objfile_context
, name
, domain
);
1416 slot
= bsc
->symbols
+ hash
% bsc
->size
;
1420 if (eq_symbol_entry (slot
, objfile_context
, name
, domain
))
1422 if (symbol_lookup_debug
)
1423 fprintf_unfiltered (gdb_stdlog
,
1424 "%s block symbol cache hit%s for %s, %s\n",
1425 block
== GLOBAL_BLOCK
? "Global" : "Static",
1426 slot
->state
== SYMBOL_SLOT_NOT_FOUND
1427 ? " (not found)" : "",
1428 name
, domain_name (domain
));
1430 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1431 return SYMBOL_LOOKUP_FAILED
;
1432 return slot
->value
.found
;
1435 if (symbol_lookup_debug
)
1437 fprintf_unfiltered (gdb_stdlog
,
1438 "%s block symbol cache miss for %s, %s\n",
1439 block
== GLOBAL_BLOCK
? "Global" : "Static",
1440 name
, domain_name (domain
));
1446 /* Clear out SLOT. */
1449 symbol_cache_clear_slot (struct symbol_cache_slot
*slot
)
1451 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1452 xfree (slot
->value
.not_found
.name
);
1453 slot
->state
= SYMBOL_SLOT_UNUSED
;
1456 /* Mark SYMBOL as found in SLOT.
1457 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1458 if it's not needed to distinguish lookups (STATIC_BLOCK). It is *not*
1459 necessarily the objfile the symbol was found in. */
1462 symbol_cache_mark_found (struct block_symbol_cache
*bsc
,
1463 struct symbol_cache_slot
*slot
,
1464 struct objfile
*objfile_context
,
1465 struct symbol
*symbol
)
1469 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1472 symbol_cache_clear_slot (slot
);
1474 slot
->state
= SYMBOL_SLOT_FOUND
;
1475 slot
->objfile_context
= objfile_context
;
1476 slot
->value
.found
= symbol
;
1479 /* Mark symbol NAME, DOMAIN as not found in SLOT.
1480 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1481 if it's not needed to distinguish lookups (STATIC_BLOCK). */
1484 symbol_cache_mark_not_found (struct block_symbol_cache
*bsc
,
1485 struct symbol_cache_slot
*slot
,
1486 struct objfile
*objfile_context
,
1487 const char *name
, domain_enum domain
)
1491 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1494 symbol_cache_clear_slot (slot
);
1496 slot
->state
= SYMBOL_SLOT_NOT_FOUND
;
1497 slot
->objfile_context
= objfile_context
;
1498 slot
->value
.not_found
.name
= xstrdup (name
);
1499 slot
->value
.not_found
.domain
= domain
;
1502 /* Flush the symbol cache of PSPACE. */
1505 symbol_cache_flush (struct program_space
*pspace
)
1507 struct symbol_cache
*cache
= program_space_data (pspace
, symbol_cache_key
);
1513 if (cache
->global_symbols
== NULL
)
1515 gdb_assert (symbol_cache_size
== 0);
1516 gdb_assert (cache
->static_symbols
== NULL
);
1520 /* If the cache is untouched since the last flush, early exit.
1521 This is important for performance during the startup of a program linked
1522 with 100s (or 1000s) of shared libraries. */
1523 if (cache
->global_symbols
->misses
== 0
1524 && cache
->static_symbols
->misses
== 0)
1527 gdb_assert (cache
->global_symbols
->size
== symbol_cache_size
);
1528 gdb_assert (cache
->static_symbols
->size
== symbol_cache_size
);
1530 for (pass
= 0; pass
< 2; ++pass
)
1532 struct block_symbol_cache
*bsc
1533 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1536 for (i
= 0; i
< bsc
->size
; ++i
)
1537 symbol_cache_clear_slot (&bsc
->symbols
[i
]);
1540 cache
->global_symbols
->hits
= 0;
1541 cache
->global_symbols
->misses
= 0;
1542 cache
->global_symbols
->collisions
= 0;
1543 cache
->static_symbols
->hits
= 0;
1544 cache
->static_symbols
->misses
= 0;
1545 cache
->static_symbols
->collisions
= 0;
1551 symbol_cache_dump (const struct symbol_cache
*cache
)
1555 if (cache
->global_symbols
== NULL
)
1557 printf_filtered (" <disabled>\n");
1561 for (pass
= 0; pass
< 2; ++pass
)
1563 const struct block_symbol_cache
*bsc
1564 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1568 printf_filtered ("Global symbols:\n");
1570 printf_filtered ("Static symbols:\n");
1572 for (i
= 0; i
< bsc
->size
; ++i
)
1574 const struct symbol_cache_slot
*slot
= &bsc
->symbols
[i
];
1578 switch (slot
->state
)
1580 case SYMBOL_SLOT_UNUSED
:
1582 case SYMBOL_SLOT_NOT_FOUND
:
1583 printf_filtered (" [%-4u] = %s, %s (not found)\n", i
,
1584 host_address_to_string (slot
->objfile_context
),
1585 slot
->value
.not_found
.name
);
1587 case SYMBOL_SLOT_FOUND
:
1588 printf_filtered (" [%-4u] = %s, %s\n", i
,
1589 host_address_to_string (slot
->objfile_context
),
1590 SYMBOL_PRINT_NAME (slot
->value
.found
));
1597 /* The "mt print symbol-cache" command. */
1600 maintenance_print_symbol_cache (char *args
, int from_tty
)
1602 struct program_space
*pspace
;
1604 ALL_PSPACES (pspace
)
1606 struct symbol_cache
*cache
;
1608 printf_filtered (_("Symbol cache for pspace %d\n%s:\n"),
1610 pspace
->symfile_object_file
!= NULL
1611 ? objfile_name (pspace
->symfile_object_file
)
1612 : "(no object file)");
1614 /* If the cache hasn't been created yet, avoid creating one. */
1615 cache
= program_space_data (pspace
, symbol_cache_key
);
1617 printf_filtered (" <empty>\n");
1619 symbol_cache_dump (cache
);
1623 /* The "mt flush-symbol-cache" command. */
1626 maintenance_flush_symbol_cache (char *args
, int from_tty
)
1628 struct program_space
*pspace
;
1630 ALL_PSPACES (pspace
)
1632 symbol_cache_flush (pspace
);
1636 /* Print usage statistics of CACHE. */
1639 symbol_cache_stats (struct symbol_cache
*cache
)
1643 if (cache
->global_symbols
== NULL
)
1645 printf_filtered (" <disabled>\n");
1649 for (pass
= 0; pass
< 2; ++pass
)
1651 const struct block_symbol_cache
*bsc
1652 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1657 printf_filtered ("Global block cache stats:\n");
1659 printf_filtered ("Static block cache stats:\n");
1661 printf_filtered (" size: %u\n", bsc
->size
);
1662 printf_filtered (" hits: %u\n", bsc
->hits
);
1663 printf_filtered (" misses: %u\n", bsc
->misses
);
1664 printf_filtered (" collisions: %u\n", bsc
->collisions
);
1668 /* The "mt print symbol-cache-statistics" command. */
1671 maintenance_print_symbol_cache_statistics (char *args
, int from_tty
)
1673 struct program_space
*pspace
;
1675 ALL_PSPACES (pspace
)
1677 struct symbol_cache
*cache
;
1679 printf_filtered (_("Symbol cache statistics for pspace %d\n%s:\n"),
1681 pspace
->symfile_object_file
!= NULL
1682 ? objfile_name (pspace
->symfile_object_file
)
1683 : "(no object file)");
1685 /* If the cache hasn't been created yet, avoid creating one. */
1686 cache
= program_space_data (pspace
, symbol_cache_key
);
1688 printf_filtered (" empty, no stats available\n");
1690 symbol_cache_stats (cache
);
1694 /* This module's 'new_objfile' observer. */
1697 symtab_new_objfile_observer (struct objfile
*objfile
)
1699 /* Ideally we'd use OBJFILE->pspace, but OBJFILE may be NULL. */
1700 symbol_cache_flush (current_program_space
);
1703 /* This module's 'free_objfile' observer. */
1706 symtab_free_objfile_observer (struct objfile
*objfile
)
1708 symbol_cache_flush (objfile
->pspace
);
1711 /* Debug symbols usually don't have section information. We need to dig that
1712 out of the minimal symbols and stash that in the debug symbol. */
1715 fixup_section (struct general_symbol_info
*ginfo
,
1716 CORE_ADDR addr
, struct objfile
*objfile
)
1718 struct minimal_symbol
*msym
;
1720 /* First, check whether a minimal symbol with the same name exists
1721 and points to the same address. The address check is required
1722 e.g. on PowerPC64, where the minimal symbol for a function will
1723 point to the function descriptor, while the debug symbol will
1724 point to the actual function code. */
1725 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1727 ginfo
->section
= MSYMBOL_SECTION (msym
);
1730 /* Static, function-local variables do appear in the linker
1731 (minimal) symbols, but are frequently given names that won't
1732 be found via lookup_minimal_symbol(). E.g., it has been
1733 observed in frv-uclinux (ELF) executables that a static,
1734 function-local variable named "foo" might appear in the
1735 linker symbols as "foo.6" or "foo.3". Thus, there is no
1736 point in attempting to extend the lookup-by-name mechanism to
1737 handle this case due to the fact that there can be multiple
1740 So, instead, search the section table when lookup by name has
1741 failed. The ``addr'' and ``endaddr'' fields may have already
1742 been relocated. If so, the relocation offset (i.e. the
1743 ANOFFSET value) needs to be subtracted from these values when
1744 performing the comparison. We unconditionally subtract it,
1745 because, when no relocation has been performed, the ANOFFSET
1746 value will simply be zero.
1748 The address of the symbol whose section we're fixing up HAS
1749 NOT BEEN adjusted (relocated) yet. It can't have been since
1750 the section isn't yet known and knowing the section is
1751 necessary in order to add the correct relocation value. In
1752 other words, we wouldn't even be in this function (attempting
1753 to compute the section) if it were already known.
1755 Note that it is possible to search the minimal symbols
1756 (subtracting the relocation value if necessary) to find the
1757 matching minimal symbol, but this is overkill and much less
1758 efficient. It is not necessary to find the matching minimal
1759 symbol, only its section.
1761 Note that this technique (of doing a section table search)
1762 can fail when unrelocated section addresses overlap. For
1763 this reason, we still attempt a lookup by name prior to doing
1764 a search of the section table. */
1766 struct obj_section
*s
;
1769 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1771 int idx
= s
- objfile
->sections
;
1772 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1777 if (obj_section_addr (s
) - offset
<= addr
1778 && addr
< obj_section_endaddr (s
) - offset
)
1780 ginfo
->section
= idx
;
1785 /* If we didn't find the section, assume it is in the first
1786 section. If there is no allocated section, then it hardly
1787 matters what we pick, so just pick zero. */
1791 ginfo
->section
= fallback
;
1796 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1803 if (!SYMBOL_OBJFILE_OWNED (sym
))
1806 /* We either have an OBJFILE, or we can get at it from the sym's
1807 symtab. Anything else is a bug. */
1808 gdb_assert (objfile
|| symbol_symtab (sym
));
1810 if (objfile
== NULL
)
1811 objfile
= symbol_objfile (sym
);
1813 if (SYMBOL_OBJ_SECTION (objfile
, sym
))
1816 /* We should have an objfile by now. */
1817 gdb_assert (objfile
);
1819 switch (SYMBOL_CLASS (sym
))
1823 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1826 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1830 /* Nothing else will be listed in the minsyms -- no use looking
1835 fixup_section (&sym
->ginfo
, addr
, objfile
);
1840 /* Compute the demangled form of NAME as used by the various symbol
1841 lookup functions. The result is stored in *RESULT_NAME. Returns a
1842 cleanup which can be used to clean up the result.
1844 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1845 Normally, Ada symbol lookups are performed using the encoded name
1846 rather than the demangled name, and so it might seem to make sense
1847 for this function to return an encoded version of NAME.
1848 Unfortunately, we cannot do this, because this function is used in
1849 circumstances where it is not appropriate to try to encode NAME.
1850 For instance, when displaying the frame info, we demangle the name
1851 of each parameter, and then perform a symbol lookup inside our
1852 function using that demangled name. In Ada, certain functions
1853 have internally-generated parameters whose name contain uppercase
1854 characters. Encoding those name would result in those uppercase
1855 characters to become lowercase, and thus cause the symbol lookup
1859 demangle_for_lookup (const char *name
, enum language lang
,
1860 const char **result_name
)
1862 char *demangled_name
= NULL
;
1863 const char *modified_name
= NULL
;
1864 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1866 modified_name
= name
;
1868 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1869 lookup, so we can always binary search. */
1870 if (lang
== language_cplus
)
1872 demangled_name
= gdb_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1875 modified_name
= demangled_name
;
1876 make_cleanup (xfree
, demangled_name
);
1880 /* If we were given a non-mangled name, canonicalize it
1881 according to the language (so far only for C++). */
1882 demangled_name
= cp_canonicalize_string (name
);
1885 modified_name
= demangled_name
;
1886 make_cleanup (xfree
, demangled_name
);
1890 else if (lang
== language_java
)
1892 demangled_name
= gdb_demangle (name
,
1893 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1896 modified_name
= demangled_name
;
1897 make_cleanup (xfree
, demangled_name
);
1900 else if (lang
== language_d
)
1902 demangled_name
= d_demangle (name
, 0);
1905 modified_name
= demangled_name
;
1906 make_cleanup (xfree
, demangled_name
);
1909 else if (lang
== language_go
)
1911 demangled_name
= go_demangle (name
, 0);
1914 modified_name
= demangled_name
;
1915 make_cleanup (xfree
, demangled_name
);
1919 *result_name
= modified_name
;
1925 This function (or rather its subordinates) have a bunch of loops and
1926 it would seem to be attractive to put in some QUIT's (though I'm not really
1927 sure whether it can run long enough to be really important). But there
1928 are a few calls for which it would appear to be bad news to quit
1929 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1930 that there is C++ code below which can error(), but that probably
1931 doesn't affect these calls since they are looking for a known
1932 variable and thus can probably assume it will never hit the C++
1936 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1937 const domain_enum domain
, enum language lang
,
1938 struct field_of_this_result
*is_a_field_of_this
)
1940 const char *modified_name
;
1941 struct symbol
*returnval
;
1942 struct cleanup
*cleanup
= demangle_for_lookup (name
, lang
, &modified_name
);
1944 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1945 is_a_field_of_this
);
1946 do_cleanups (cleanup
);
1954 lookup_symbol (const char *name
, const struct block
*block
,
1956 struct field_of_this_result
*is_a_field_of_this
)
1958 return lookup_symbol_in_language (name
, block
, domain
,
1959 current_language
->la_language
,
1960 is_a_field_of_this
);
1966 lookup_language_this (const struct language_defn
*lang
,
1967 const struct block
*block
)
1969 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1972 if (symbol_lookup_debug
> 1)
1974 struct objfile
*objfile
= lookup_objfile_from_block (block
);
1976 fprintf_unfiltered (gdb_stdlog
,
1977 "lookup_language_this (%s, %s (objfile %s))",
1978 lang
->la_name
, host_address_to_string (block
),
1979 objfile_debug_name (objfile
));
1986 sym
= block_lookup_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
1989 if (symbol_lookup_debug
> 1)
1991 fprintf_unfiltered (gdb_stdlog
, " = %s (%s, block %s)\n",
1992 SYMBOL_PRINT_NAME (sym
),
1993 host_address_to_string (sym
),
1994 host_address_to_string (block
));
1996 block_found
= block
;
1999 if (BLOCK_FUNCTION (block
))
2001 block
= BLOCK_SUPERBLOCK (block
);
2004 if (symbol_lookup_debug
> 1)
2005 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2009 /* Given TYPE, a structure/union,
2010 return 1 if the component named NAME from the ultimate target
2011 structure/union is defined, otherwise, return 0. */
2014 check_field (struct type
*type
, const char *name
,
2015 struct field_of_this_result
*is_a_field_of_this
)
2019 /* The type may be a stub. */
2020 CHECK_TYPEDEF (type
);
2022 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
2024 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
2026 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
2028 is_a_field_of_this
->type
= type
;
2029 is_a_field_of_this
->field
= &TYPE_FIELD (type
, i
);
2034 /* C++: If it was not found as a data field, then try to return it
2035 as a pointer to a method. */
2037 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
2039 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type
, i
), name
) == 0)
2041 is_a_field_of_this
->type
= type
;
2042 is_a_field_of_this
->fn_field
= &TYPE_FN_FIELDLIST (type
, i
);
2047 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
2048 if (check_field (TYPE_BASECLASS (type
, i
), name
, is_a_field_of_this
))
2054 /* Behave like lookup_symbol except that NAME is the natural name
2055 (e.g., demangled name) of the symbol that we're looking for. */
2057 static struct symbol
*
2058 lookup_symbol_aux (const char *name
, const struct block
*block
,
2059 const domain_enum domain
, enum language language
,
2060 struct field_of_this_result
*is_a_field_of_this
)
2063 const struct language_defn
*langdef
;
2065 if (symbol_lookup_debug
)
2067 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2069 fprintf_unfiltered (gdb_stdlog
,
2070 "lookup_symbol_aux (%s, %s (objfile %s), %s, %s)\n",
2071 name
, host_address_to_string (block
),
2073 ? objfile_debug_name (objfile
) : "NULL",
2074 domain_name (domain
), language_str (language
));
2077 /* Initialize block_found so that the language la_lookup_symbol_nonlocal
2078 routines don't have to set it (to NULL) if a primitive type is found.
2079 We do this early so that block_found is also NULL if no symbol is
2080 found (though this is not part of the API, and callers cannot assume
2084 /* Make sure we do something sensible with is_a_field_of_this, since
2085 the callers that set this parameter to some non-null value will
2086 certainly use it later. If we don't set it, the contents of
2087 is_a_field_of_this are undefined. */
2088 if (is_a_field_of_this
!= NULL
)
2089 memset (is_a_field_of_this
, 0, sizeof (*is_a_field_of_this
));
2091 /* Search specified block and its superiors. Don't search
2092 STATIC_BLOCK or GLOBAL_BLOCK. */
2094 sym
= lookup_local_symbol (name
, block
, domain
, language
);
2097 if (symbol_lookup_debug
)
2099 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2100 host_address_to_string (sym
));
2105 /* If requested to do so by the caller and if appropriate for LANGUAGE,
2106 check to see if NAME is a field of `this'. */
2108 langdef
= language_def (language
);
2110 /* Don't do this check if we are searching for a struct. It will
2111 not be found by check_field, but will be found by other
2113 if (is_a_field_of_this
!= NULL
&& domain
!= STRUCT_DOMAIN
)
2115 struct symbol
*sym
= lookup_language_this (langdef
, block
);
2119 struct type
*t
= sym
->type
;
2121 /* I'm not really sure that type of this can ever
2122 be typedefed; just be safe. */
2124 if (TYPE_CODE (t
) == TYPE_CODE_PTR
2125 || TYPE_CODE (t
) == TYPE_CODE_REF
)
2126 t
= TYPE_TARGET_TYPE (t
);
2128 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
2129 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
2130 error (_("Internal error: `%s' is not an aggregate"),
2131 langdef
->la_name_of_this
);
2133 if (check_field (t
, name
, is_a_field_of_this
))
2135 if (symbol_lookup_debug
)
2137 fprintf_unfiltered (gdb_stdlog
,
2138 "lookup_symbol_aux (...) = NULL\n");
2145 /* Now do whatever is appropriate for LANGUAGE to look
2146 up static and global variables. */
2148 sym
= langdef
->la_lookup_symbol_nonlocal (langdef
, name
, block
, domain
);
2151 if (symbol_lookup_debug
)
2153 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2154 host_address_to_string (sym
));
2159 /* Now search all static file-level symbols. Not strictly correct,
2160 but more useful than an error. */
2162 sym
= lookup_static_symbol (name
, domain
);
2163 if (symbol_lookup_debug
)
2165 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2166 sym
!= NULL
? host_address_to_string (sym
) : "NULL");
2171 /* Check to see if the symbol is defined in BLOCK or its superiors.
2172 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
2174 static struct symbol
*
2175 lookup_local_symbol (const char *name
, const struct block
*block
,
2176 const domain_enum domain
,
2177 enum language language
)
2180 const struct block
*static_block
= block_static_block (block
);
2181 const char *scope
= block_scope (block
);
2183 /* Check if either no block is specified or it's a global block. */
2185 if (static_block
== NULL
)
2188 while (block
!= static_block
)
2190 sym
= lookup_symbol_in_block (name
, block
, domain
);
2194 if (language
== language_cplus
|| language
== language_fortran
)
2196 sym
= cp_lookup_symbol_imports_or_template (scope
, name
, block
,
2202 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
2204 block
= BLOCK_SUPERBLOCK (block
);
2207 /* We've reached the end of the function without finding a result. */
2215 lookup_objfile_from_block (const struct block
*block
)
2217 struct objfile
*obj
;
2218 struct compunit_symtab
*cust
;
2223 block
= block_global_block (block
);
2224 /* Look through all blockvectors. */
2225 ALL_COMPUNITS (obj
, cust
)
2226 if (block
== BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
),
2229 if (obj
->separate_debug_objfile_backlink
)
2230 obj
= obj
->separate_debug_objfile_backlink
;
2241 lookup_symbol_in_block (const char *name
, const struct block
*block
,
2242 const domain_enum domain
)
2246 if (symbol_lookup_debug
> 1)
2248 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2250 fprintf_unfiltered (gdb_stdlog
,
2251 "lookup_symbol_in_block (%s, %s (objfile %s), %s)",
2252 name
, host_address_to_string (block
),
2253 objfile_debug_name (objfile
),
2254 domain_name (domain
));
2257 sym
= block_lookup_symbol (block
, name
, domain
);
2260 if (symbol_lookup_debug
> 1)
2262 fprintf_unfiltered (gdb_stdlog
, " = %s\n",
2263 host_address_to_string (sym
));
2265 block_found
= block
;
2266 return fixup_symbol_section (sym
, NULL
);
2269 if (symbol_lookup_debug
> 1)
2270 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2277 lookup_global_symbol_from_objfile (struct objfile
*main_objfile
,
2279 const domain_enum domain
)
2281 struct objfile
*objfile
;
2283 for (objfile
= main_objfile
;
2285 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
2287 struct symbol
*sym
= lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
,
2297 /* Check to see if the symbol is defined in one of the OBJFILE's
2298 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
2299 depending on whether or not we want to search global symbols or
2302 static struct symbol
*
2303 lookup_symbol_in_objfile_symtabs (struct objfile
*objfile
, int block_index
,
2304 const char *name
, const domain_enum domain
)
2306 struct compunit_symtab
*cust
;
2308 gdb_assert (block_index
== GLOBAL_BLOCK
|| block_index
== STATIC_BLOCK
);
2310 if (symbol_lookup_debug
> 1)
2312 fprintf_unfiltered (gdb_stdlog
,
2313 "lookup_symbol_in_objfile_symtabs (%s, %s, %s, %s)",
2314 objfile_debug_name (objfile
),
2315 block_index
== GLOBAL_BLOCK
2316 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2317 name
, domain_name (domain
));
2320 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2322 const struct blockvector
*bv
;
2323 const struct block
*block
;
2326 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2327 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2328 sym
= block_lookup_symbol_primary (block
, name
, domain
);
2331 if (symbol_lookup_debug
> 1)
2333 fprintf_unfiltered (gdb_stdlog
, " = %s (block %s)\n",
2334 host_address_to_string (sym
),
2335 host_address_to_string (block
));
2337 block_found
= block
;
2338 return fixup_symbol_section (sym
, objfile
);
2342 if (symbol_lookup_debug
> 1)
2343 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2347 /* Wrapper around lookup_symbol_in_objfile_symtabs for search_symbols.
2348 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
2349 and all associated separate debug objfiles.
2351 Normally we only look in OBJFILE, and not any separate debug objfiles
2352 because the outer loop will cause them to be searched too. This case is
2353 different. Here we're called from search_symbols where it will only
2354 call us for the the objfile that contains a matching minsym. */
2356 static struct symbol
*
2357 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
2358 const char *linkage_name
,
2361 enum language lang
= current_language
->la_language
;
2362 const char *modified_name
;
2363 struct cleanup
*cleanup
= demangle_for_lookup (linkage_name
, lang
,
2365 struct objfile
*main_objfile
, *cur_objfile
;
2367 if (objfile
->separate_debug_objfile_backlink
)
2368 main_objfile
= objfile
->separate_debug_objfile_backlink
;
2370 main_objfile
= objfile
;
2372 for (cur_objfile
= main_objfile
;
2374 cur_objfile
= objfile_separate_debug_iterate (main_objfile
, cur_objfile
))
2378 sym
= lookup_symbol_in_objfile_symtabs (cur_objfile
, GLOBAL_BLOCK
,
2379 modified_name
, domain
);
2381 sym
= lookup_symbol_in_objfile_symtabs (cur_objfile
, STATIC_BLOCK
,
2382 modified_name
, domain
);
2385 do_cleanups (cleanup
);
2390 do_cleanups (cleanup
);
2394 /* A helper function that throws an exception when a symbol was found
2395 in a psymtab but not in a symtab. */
2397 static void ATTRIBUTE_NORETURN
2398 error_in_psymtab_expansion (int block_index
, const char *name
,
2399 struct compunit_symtab
*cust
)
2402 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
2403 %s may be an inlined function, or may be a template function\n \
2404 (if a template, try specifying an instantiation: %s<type>)."),
2405 block_index
== GLOBAL_BLOCK
? "global" : "static",
2407 symtab_to_filename_for_display (compunit_primary_filetab (cust
)),
2411 /* A helper function for various lookup routines that interfaces with
2412 the "quick" symbol table functions. */
2414 static struct symbol
*
2415 lookup_symbol_via_quick_fns (struct objfile
*objfile
, int block_index
,
2416 const char *name
, const domain_enum domain
)
2418 struct compunit_symtab
*cust
;
2419 const struct blockvector
*bv
;
2420 const struct block
*block
;
2426 if (symbol_lookup_debug
> 1)
2428 fprintf_unfiltered (gdb_stdlog
,
2429 "lookup_symbol_via_quick_fns (%s, %s, %s, %s)\n",
2430 objfile_debug_name (objfile
),
2431 block_index
== GLOBAL_BLOCK
2432 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2433 name
, domain_name (domain
));
2436 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
, domain
);
2439 if (symbol_lookup_debug
> 1)
2441 fprintf_unfiltered (gdb_stdlog
,
2442 "lookup_symbol_via_quick_fns (...) = NULL\n");
2447 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2448 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2449 sym
= block_lookup_symbol (block
, name
, domain
);
2451 error_in_psymtab_expansion (block_index
, name
, cust
);
2453 if (symbol_lookup_debug
> 1)
2455 fprintf_unfiltered (gdb_stdlog
,
2456 "lookup_symbol_via_quick_fns (...) = %s (block %s)\n",
2457 host_address_to_string (sym
),
2458 host_address_to_string (block
));
2461 block_found
= block
;
2462 return fixup_symbol_section (sym
, objfile
);
2468 basic_lookup_symbol_nonlocal (const struct language_defn
*langdef
,
2470 const struct block
*block
,
2471 const domain_enum domain
)
2475 /* NOTE: carlton/2003-05-19: The comments below were written when
2476 this (or what turned into this) was part of lookup_symbol_aux;
2477 I'm much less worried about these questions now, since these
2478 decisions have turned out well, but I leave these comments here
2481 /* NOTE: carlton/2002-12-05: There is a question as to whether or
2482 not it would be appropriate to search the current global block
2483 here as well. (That's what this code used to do before the
2484 is_a_field_of_this check was moved up.) On the one hand, it's
2485 redundant with the lookup in all objfiles search that happens
2486 next. On the other hand, if decode_line_1 is passed an argument
2487 like filename:var, then the user presumably wants 'var' to be
2488 searched for in filename. On the third hand, there shouldn't be
2489 multiple global variables all of which are named 'var', and it's
2490 not like decode_line_1 has ever restricted its search to only
2491 global variables in a single filename. All in all, only
2492 searching the static block here seems best: it's correct and it's
2495 /* NOTE: carlton/2002-12-05: There's also a possible performance
2496 issue here: if you usually search for global symbols in the
2497 current file, then it would be slightly better to search the
2498 current global block before searching all the symtabs. But there
2499 are other factors that have a much greater effect on performance
2500 than that one, so I don't think we should worry about that for
2503 /* NOTE: dje/2014-10-26: The lookup in all objfiles search could skip
2504 the current objfile. Searching the current objfile first is useful
2505 for both matching user expectations as well as performance. */
2507 sym
= lookup_symbol_in_static_block (name
, block
, domain
);
2511 /* If we didn't find a definition for a builtin type in the static block,
2512 search for it now. This is actually the right thing to do and can be
2513 a massive performance win. E.g., when debugging a program with lots of
2514 shared libraries we could search all of them only to find out the
2515 builtin type isn't defined in any of them. This is common for types
2517 if (domain
== VAR_DOMAIN
)
2519 struct gdbarch
*gdbarch
;
2522 gdbarch
= target_gdbarch ();
2524 gdbarch
= block_gdbarch (block
);
2525 sym
= language_lookup_primitive_type_as_symbol (langdef
, gdbarch
, name
);
2530 return lookup_global_symbol (name
, block
, domain
);
2536 lookup_symbol_in_static_block (const char *name
,
2537 const struct block
*block
,
2538 const domain_enum domain
)
2540 const struct block
*static_block
= block_static_block (block
);
2543 if (static_block
== NULL
)
2546 if (symbol_lookup_debug
)
2548 struct objfile
*objfile
= lookup_objfile_from_block (static_block
);
2550 fprintf_unfiltered (gdb_stdlog
,
2551 "lookup_symbol_in_static_block (%s, %s (objfile %s),"
2554 host_address_to_string (block
),
2555 objfile_debug_name (objfile
),
2556 domain_name (domain
));
2559 sym
= lookup_symbol_in_block (name
, static_block
, domain
);
2560 if (symbol_lookup_debug
)
2562 fprintf_unfiltered (gdb_stdlog
,
2563 "lookup_symbol_in_static_block (...) = %s\n",
2564 sym
!= NULL
? host_address_to_string (sym
) : "NULL");
2569 /* Perform the standard symbol lookup of NAME in OBJFILE:
2570 1) First search expanded symtabs, and if not found
2571 2) Search the "quick" symtabs (partial or .gdb_index).
2572 BLOCK_INDEX is one of GLOBAL_BLOCK or STATIC_BLOCK. */
2574 static struct symbol
*
2575 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
2576 const char *name
, const domain_enum domain
)
2578 struct symbol
*result
;
2580 if (symbol_lookup_debug
)
2582 fprintf_unfiltered (gdb_stdlog
,
2583 "lookup_symbol_in_objfile (%s, %s, %s, %s)\n",
2584 objfile_debug_name (objfile
),
2585 block_index
== GLOBAL_BLOCK
2586 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2587 name
, domain_name (domain
));
2590 result
= lookup_symbol_in_objfile_symtabs (objfile
, block_index
,
2594 if (symbol_lookup_debug
)
2596 fprintf_unfiltered (gdb_stdlog
,
2597 "lookup_symbol_in_objfile (...) = %s"
2599 host_address_to_string (result
));
2604 result
= lookup_symbol_via_quick_fns (objfile
, block_index
,
2606 if (symbol_lookup_debug
)
2608 fprintf_unfiltered (gdb_stdlog
,
2609 "lookup_symbol_in_objfile (...) = %s%s\n",
2611 ? host_address_to_string (result
)
2613 result
!= NULL
? " (via quick fns)" : "");
2621 lookup_static_symbol (const char *name
, const domain_enum domain
)
2623 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2624 struct objfile
*objfile
;
2625 struct symbol
*result
;
2626 struct block_symbol_cache
*bsc
;
2627 struct symbol_cache_slot
*slot
;
2629 /* Lookup in STATIC_BLOCK is not current-objfile-dependent, so just pass
2630 NULL for OBJFILE_CONTEXT. */
2631 result
= symbol_cache_lookup (cache
, NULL
, STATIC_BLOCK
, name
, domain
,
2635 if (result
== SYMBOL_LOOKUP_FAILED
)
2640 ALL_OBJFILES (objfile
)
2642 result
= lookup_symbol_in_objfile (objfile
, STATIC_BLOCK
, name
, domain
);
2645 /* Still pass NULL for OBJFILE_CONTEXT here. */
2646 symbol_cache_mark_found (bsc
, slot
, NULL
, result
);
2651 /* Still pass NULL for OBJFILE_CONTEXT here. */
2652 symbol_cache_mark_not_found (bsc
, slot
, NULL
, name
, domain
);
2656 /* Private data to be used with lookup_symbol_global_iterator_cb. */
2658 struct global_sym_lookup_data
2660 /* The name of the symbol we are searching for. */
2663 /* The domain to use for our search. */
2666 /* The field where the callback should store the symbol if found.
2667 It should be initialized to NULL before the search is started. */
2668 struct symbol
*result
;
2671 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
2672 It searches by name for a symbol in the GLOBAL_BLOCK of the given
2673 OBJFILE. The arguments for the search are passed via CB_DATA,
2674 which in reality is a pointer to struct global_sym_lookup_data. */
2677 lookup_symbol_global_iterator_cb (struct objfile
*objfile
,
2680 struct global_sym_lookup_data
*data
=
2681 (struct global_sym_lookup_data
*) cb_data
;
2683 gdb_assert (data
->result
== NULL
);
2685 data
->result
= lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
,
2686 data
->name
, data
->domain
);
2688 /* If we found a match, tell the iterator to stop. Otherwise,
2690 return (data
->result
!= NULL
);
2696 lookup_global_symbol (const char *name
,
2697 const struct block
*block
,
2698 const domain_enum domain
)
2700 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2702 struct objfile
*objfile
;
2703 struct global_sym_lookup_data lookup_data
;
2704 struct block_symbol_cache
*bsc
;
2705 struct symbol_cache_slot
*slot
;
2707 objfile
= lookup_objfile_from_block (block
);
2709 /* First see if we can find the symbol in the cache.
2710 This works because we use the current objfile to qualify the lookup. */
2711 sym
= symbol_cache_lookup (cache
, objfile
, GLOBAL_BLOCK
, name
, domain
,
2715 if (sym
== SYMBOL_LOOKUP_FAILED
)
2720 /* Call library-specific lookup procedure. */
2721 if (objfile
!= NULL
)
2722 sym
= solib_global_lookup (objfile
, name
, domain
);
2724 /* If that didn't work go a global search (of global blocks, heh). */
2727 memset (&lookup_data
, 0, sizeof (lookup_data
));
2728 lookup_data
.name
= name
;
2729 lookup_data
.domain
= domain
;
2730 gdbarch_iterate_over_objfiles_in_search_order
2731 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch (),
2732 lookup_symbol_global_iterator_cb
, &lookup_data
, objfile
);
2733 sym
= lookup_data
.result
;
2737 symbol_cache_mark_found (bsc
, slot
, objfile
, sym
);
2739 symbol_cache_mark_not_found (bsc
, slot
, objfile
, name
, domain
);
2745 symbol_matches_domain (enum language symbol_language
,
2746 domain_enum symbol_domain
,
2749 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
2750 A Java class declaration also defines a typedef for the class.
2751 Similarly, any Ada type declaration implicitly defines a typedef. */
2752 if (symbol_language
== language_cplus
2753 || symbol_language
== language_d
2754 || symbol_language
== language_java
2755 || symbol_language
== language_ada
)
2757 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
2758 && symbol_domain
== STRUCT_DOMAIN
)
2761 /* For all other languages, strict match is required. */
2762 return (symbol_domain
== domain
);
2768 lookup_transparent_type (const char *name
)
2770 return current_language
->la_lookup_transparent_type (name
);
2773 /* A helper for basic_lookup_transparent_type that interfaces with the
2774 "quick" symbol table functions. */
2776 static struct type
*
2777 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int block_index
,
2780 struct compunit_symtab
*cust
;
2781 const struct blockvector
*bv
;
2782 struct block
*block
;
2787 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
,
2792 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2793 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2794 sym
= block_lookup_symbol (block
, name
, STRUCT_DOMAIN
);
2796 error_in_psymtab_expansion (block_index
, name
, cust
);
2798 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
2799 return SYMBOL_TYPE (sym
);
2804 /* The standard implementation of lookup_transparent_type. This code
2805 was modeled on lookup_symbol -- the parts not relevant to looking
2806 up types were just left out. In particular it's assumed here that
2807 types are available in STRUCT_DOMAIN and only in file-static or
2811 basic_lookup_transparent_type (const char *name
)
2814 struct compunit_symtab
*cust
;
2815 const struct blockvector
*bv
;
2816 struct objfile
*objfile
;
2817 struct block
*block
;
2820 /* Now search all the global symbols. Do the symtab's first, then
2821 check the psymtab's. If a psymtab indicates the existence
2822 of the desired name as a global, then do psymtab-to-symtab
2823 conversion on the fly and return the found symbol. */
2825 ALL_OBJFILES (objfile
)
2827 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2829 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2830 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2831 sym
= block_lookup_symbol (block
, name
, STRUCT_DOMAIN
);
2832 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
2834 return SYMBOL_TYPE (sym
);
2839 ALL_OBJFILES (objfile
)
2841 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
2846 /* Now search the static file-level symbols.
2847 Not strictly correct, but more useful than an error.
2848 Do the symtab's first, then
2849 check the psymtab's. If a psymtab indicates the existence
2850 of the desired name as a file-level static, then do psymtab-to-symtab
2851 conversion on the fly and return the found symbol. */
2853 ALL_OBJFILES (objfile
)
2855 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2857 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2858 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
2859 sym
= block_lookup_symbol (block
, name
, STRUCT_DOMAIN
);
2860 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
2862 return SYMBOL_TYPE (sym
);
2867 ALL_OBJFILES (objfile
)
2869 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
2874 return (struct type
*) 0;
2877 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2879 For each symbol that matches, CALLBACK is called. The symbol and
2880 DATA are passed to the callback.
2882 If CALLBACK returns zero, the iteration ends. Otherwise, the
2883 search continues. */
2886 iterate_over_symbols (const struct block
*block
, const char *name
,
2887 const domain_enum domain
,
2888 symbol_found_callback_ftype
*callback
,
2891 struct block_iterator iter
;
2894 ALL_BLOCK_SYMBOLS_WITH_NAME (block
, name
, iter
, sym
)
2896 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2897 SYMBOL_DOMAIN (sym
), domain
))
2899 if (!callback (sym
, data
))
2905 /* Find the compunit symtab associated with PC and SECTION.
2906 This will read in debug info as necessary. */
2908 struct compunit_symtab
*
2909 find_pc_sect_compunit_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2911 struct compunit_symtab
*cust
;
2912 struct compunit_symtab
*best_cust
= NULL
;
2913 struct objfile
*objfile
;
2914 CORE_ADDR distance
= 0;
2915 struct bound_minimal_symbol msymbol
;
2917 /* If we know that this is not a text address, return failure. This is
2918 necessary because we loop based on the block's high and low code
2919 addresses, which do not include the data ranges, and because
2920 we call find_pc_sect_psymtab which has a similar restriction based
2921 on the partial_symtab's texthigh and textlow. */
2922 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2924 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
2925 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
2926 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
2927 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
2928 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
2931 /* Search all symtabs for the one whose file contains our address, and which
2932 is the smallest of all the ones containing the address. This is designed
2933 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2934 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2935 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2937 This happens for native ecoff format, where code from included files
2938 gets its own symtab. The symtab for the included file should have
2939 been read in already via the dependency mechanism.
2940 It might be swifter to create several symtabs with the same name
2941 like xcoff does (I'm not sure).
2943 It also happens for objfiles that have their functions reordered.
2944 For these, the symtab we are looking for is not necessarily read in. */
2946 ALL_COMPUNITS (objfile
, cust
)
2949 const struct blockvector
*bv
;
2951 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2952 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2954 if (BLOCK_START (b
) <= pc
2955 && BLOCK_END (b
) > pc
2957 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2959 /* For an objfile that has its functions reordered,
2960 find_pc_psymtab will find the proper partial symbol table
2961 and we simply return its corresponding symtab. */
2962 /* In order to better support objfiles that contain both
2963 stabs and coff debugging info, we continue on if a psymtab
2965 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
2967 struct compunit_symtab
*result
;
2970 = objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
,
2979 struct block_iterator iter
;
2980 struct symbol
*sym
= NULL
;
2982 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2984 fixup_symbol_section (sym
, objfile
);
2985 if (matching_obj_sections (SYMBOL_OBJ_SECTION (objfile
, sym
),
2990 continue; /* No symbol in this symtab matches
2993 distance
= BLOCK_END (b
) - BLOCK_START (b
);
2998 if (best_cust
!= NULL
)
3001 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
3003 ALL_OBJFILES (objfile
)
3005 struct compunit_symtab
*result
;
3009 result
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
,
3020 /* Find the compunit symtab associated with PC.
3021 This will read in debug info as necessary.
3022 Backward compatibility, no section. */
3024 struct compunit_symtab
*
3025 find_pc_compunit_symtab (CORE_ADDR pc
)
3027 return find_pc_sect_compunit_symtab (pc
, find_pc_mapped_section (pc
));
3031 /* Find the source file and line number for a given PC value and SECTION.
3032 Return a structure containing a symtab pointer, a line number,
3033 and a pc range for the entire source line.
3034 The value's .pc field is NOT the specified pc.
3035 NOTCURRENT nonzero means, if specified pc is on a line boundary,
3036 use the line that ends there. Otherwise, in that case, the line
3037 that begins there is used. */
3039 /* The big complication here is that a line may start in one file, and end just
3040 before the start of another file. This usually occurs when you #include
3041 code in the middle of a subroutine. To properly find the end of a line's PC
3042 range, we must search all symtabs associated with this compilation unit, and
3043 find the one whose first PC is closer than that of the next line in this
3046 /* If it's worth the effort, we could be using a binary search. */
3048 struct symtab_and_line
3049 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
3051 struct compunit_symtab
*cust
;
3052 struct symtab
*iter_s
;
3053 struct linetable
*l
;
3056 struct linetable_entry
*item
;
3057 struct symtab_and_line val
;
3058 const struct blockvector
*bv
;
3059 struct bound_minimal_symbol msymbol
;
3061 /* Info on best line seen so far, and where it starts, and its file. */
3063 struct linetable_entry
*best
= NULL
;
3064 CORE_ADDR best_end
= 0;
3065 struct symtab
*best_symtab
= 0;
3067 /* Store here the first line number
3068 of a file which contains the line at the smallest pc after PC.
3069 If we don't find a line whose range contains PC,
3070 we will use a line one less than this,
3071 with a range from the start of that file to the first line's pc. */
3072 struct linetable_entry
*alt
= NULL
;
3074 /* Info on best line seen in this file. */
3076 struct linetable_entry
*prev
;
3078 /* If this pc is not from the current frame,
3079 it is the address of the end of a call instruction.
3080 Quite likely that is the start of the following statement.
3081 But what we want is the statement containing the instruction.
3082 Fudge the pc to make sure we get that. */
3084 init_sal (&val
); /* initialize to zeroes */
3086 val
.pspace
= current_program_space
;
3088 /* It's tempting to assume that, if we can't find debugging info for
3089 any function enclosing PC, that we shouldn't search for line
3090 number info, either. However, GAS can emit line number info for
3091 assembly files --- very helpful when debugging hand-written
3092 assembly code. In such a case, we'd have no debug info for the
3093 function, but we would have line info. */
3098 /* elz: added this because this function returned the wrong
3099 information if the pc belongs to a stub (import/export)
3100 to call a shlib function. This stub would be anywhere between
3101 two functions in the target, and the line info was erroneously
3102 taken to be the one of the line before the pc. */
3104 /* RT: Further explanation:
3106 * We have stubs (trampolines) inserted between procedures.
3108 * Example: "shr1" exists in a shared library, and a "shr1" stub also
3109 * exists in the main image.
3111 * In the minimal symbol table, we have a bunch of symbols
3112 * sorted by start address. The stubs are marked as "trampoline",
3113 * the others appear as text. E.g.:
3115 * Minimal symbol table for main image
3116 * main: code for main (text symbol)
3117 * shr1: stub (trampoline symbol)
3118 * foo: code for foo (text symbol)
3120 * Minimal symbol table for "shr1" image:
3122 * shr1: code for shr1 (text symbol)
3125 * So the code below is trying to detect if we are in the stub
3126 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
3127 * and if found, do the symbolization from the real-code address
3128 * rather than the stub address.
3130 * Assumptions being made about the minimal symbol table:
3131 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
3132 * if we're really in the trampoline.s If we're beyond it (say
3133 * we're in "foo" in the above example), it'll have a closer
3134 * symbol (the "foo" text symbol for example) and will not
3135 * return the trampoline.
3136 * 2. lookup_minimal_symbol_text() will find a real text symbol
3137 * corresponding to the trampoline, and whose address will
3138 * be different than the trampoline address. I put in a sanity
3139 * check for the address being the same, to avoid an
3140 * infinite recursion.
3142 msymbol
= lookup_minimal_symbol_by_pc (pc
);
3143 if (msymbol
.minsym
!= NULL
)
3144 if (MSYMBOL_TYPE (msymbol
.minsym
) == mst_solib_trampoline
)
3146 struct bound_minimal_symbol mfunsym
3147 = lookup_minimal_symbol_text (MSYMBOL_LINKAGE_NAME (msymbol
.minsym
),
3150 if (mfunsym
.minsym
== NULL
)
3151 /* I eliminated this warning since it is coming out
3152 * in the following situation:
3153 * gdb shmain // test program with shared libraries
3154 * (gdb) break shr1 // function in shared lib
3155 * Warning: In stub for ...
3156 * In the above situation, the shared lib is not loaded yet,
3157 * so of course we can't find the real func/line info,
3158 * but the "break" still works, and the warning is annoying.
3159 * So I commented out the warning. RT */
3160 /* warning ("In stub for %s; unable to find real function/line info",
3161 SYMBOL_LINKAGE_NAME (msymbol)); */
3164 else if (BMSYMBOL_VALUE_ADDRESS (mfunsym
)
3165 == BMSYMBOL_VALUE_ADDRESS (msymbol
))
3166 /* Avoid infinite recursion */
3167 /* See above comment about why warning is commented out. */
3168 /* warning ("In stub for %s; unable to find real function/line info",
3169 SYMBOL_LINKAGE_NAME (msymbol)); */
3173 return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym
), 0);
3177 cust
= find_pc_sect_compunit_symtab (pc
, section
);
3180 /* If no symbol information, return previous pc. */
3187 bv
= COMPUNIT_BLOCKVECTOR (cust
);
3189 /* Look at all the symtabs that share this blockvector.
3190 They all have the same apriori range, that we found was right;
3191 but they have different line tables. */
3193 ALL_COMPUNIT_FILETABS (cust
, iter_s
)
3195 /* Find the best line in this symtab. */
3196 l
= SYMTAB_LINETABLE (iter_s
);
3202 /* I think len can be zero if the symtab lacks line numbers
3203 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
3204 I'm not sure which, and maybe it depends on the symbol
3210 item
= l
->item
; /* Get first line info. */
3212 /* Is this file's first line closer than the first lines of other files?
3213 If so, record this file, and its first line, as best alternate. */
3214 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
3217 for (i
= 0; i
< len
; i
++, item
++)
3219 /* Leave prev pointing to the linetable entry for the last line
3220 that started at or before PC. */
3227 /* At this point, prev points at the line whose start addr is <= pc, and
3228 item points at the next line. If we ran off the end of the linetable
3229 (pc >= start of the last line), then prev == item. If pc < start of
3230 the first line, prev will not be set. */
3232 /* Is this file's best line closer than the best in the other files?
3233 If so, record this file, and its best line, as best so far. Don't
3234 save prev if it represents the end of a function (i.e. line number
3235 0) instead of a real line. */
3237 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
3240 best_symtab
= iter_s
;
3242 /* Discard BEST_END if it's before the PC of the current BEST. */
3243 if (best_end
<= best
->pc
)
3247 /* If another line (denoted by ITEM) is in the linetable and its
3248 PC is after BEST's PC, but before the current BEST_END, then
3249 use ITEM's PC as the new best_end. */
3250 if (best
&& i
< len
&& item
->pc
> best
->pc
3251 && (best_end
== 0 || best_end
> item
->pc
))
3252 best_end
= item
->pc
;
3257 /* If we didn't find any line number info, just return zeros.
3258 We used to return alt->line - 1 here, but that could be
3259 anywhere; if we don't have line number info for this PC,
3260 don't make some up. */
3263 else if (best
->line
== 0)
3265 /* If our best fit is in a range of PC's for which no line
3266 number info is available (line number is zero) then we didn't
3267 find any valid line information. */
3272 val
.symtab
= best_symtab
;
3273 val
.line
= best
->line
;
3275 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
3280 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
3282 val
.section
= section
;
3286 /* Backward compatibility (no section). */
3288 struct symtab_and_line
3289 find_pc_line (CORE_ADDR pc
, int notcurrent
)
3291 struct obj_section
*section
;
3293 section
= find_pc_overlay (pc
);
3294 if (pc_in_unmapped_range (pc
, section
))
3295 pc
= overlay_mapped_address (pc
, section
);
3296 return find_pc_sect_line (pc
, section
, notcurrent
);
3302 find_pc_line_symtab (CORE_ADDR pc
)
3304 struct symtab_and_line sal
;
3306 /* This always passes zero for NOTCURRENT to find_pc_line.
3307 There are currently no callers that ever pass non-zero. */
3308 sal
= find_pc_line (pc
, 0);
3312 /* Find line number LINE in any symtab whose name is the same as
3315 If found, return the symtab that contains the linetable in which it was
3316 found, set *INDEX to the index in the linetable of the best entry
3317 found, and set *EXACT_MATCH nonzero if the value returned is an
3320 If not found, return NULL. */
3323 find_line_symtab (struct symtab
*symtab
, int line
,
3324 int *index
, int *exact_match
)
3326 int exact
= 0; /* Initialized here to avoid a compiler warning. */
3328 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
3332 struct linetable
*best_linetable
;
3333 struct symtab
*best_symtab
;
3335 /* First try looking it up in the given symtab. */
3336 best_linetable
= SYMTAB_LINETABLE (symtab
);
3337 best_symtab
= symtab
;
3338 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
3339 if (best_index
< 0 || !exact
)
3341 /* Didn't find an exact match. So we better keep looking for
3342 another symtab with the same name. In the case of xcoff,
3343 multiple csects for one source file (produced by IBM's FORTRAN
3344 compiler) produce multiple symtabs (this is unavoidable
3345 assuming csects can be at arbitrary places in memory and that
3346 the GLOBAL_BLOCK of a symtab has a begin and end address). */
3348 /* BEST is the smallest linenumber > LINE so far seen,
3349 or 0 if none has been seen so far.
3350 BEST_INDEX and BEST_LINETABLE identify the item for it. */
3353 struct objfile
*objfile
;
3354 struct compunit_symtab
*cu
;
3357 if (best_index
>= 0)
3358 best
= best_linetable
->item
[best_index
].line
;
3362 ALL_OBJFILES (objfile
)
3365 objfile
->sf
->qf
->expand_symtabs_with_fullname (objfile
,
3366 symtab_to_fullname (symtab
));
3369 ALL_FILETABS (objfile
, cu
, s
)
3371 struct linetable
*l
;
3374 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
3376 if (FILENAME_CMP (symtab_to_fullname (symtab
),
3377 symtab_to_fullname (s
)) != 0)
3379 l
= SYMTAB_LINETABLE (s
);
3380 ind
= find_line_common (l
, line
, &exact
, 0);
3390 if (best
== 0 || l
->item
[ind
].line
< best
)
3392 best
= l
->item
[ind
].line
;
3405 *index
= best_index
;
3407 *exact_match
= exact
;
3412 /* Given SYMTAB, returns all the PCs function in the symtab that
3413 exactly match LINE. Returns NULL if there are no exact matches,
3414 but updates BEST_ITEM in this case. */
3417 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
3418 struct linetable_entry
**best_item
)
3421 VEC (CORE_ADDR
) *result
= NULL
;
3423 /* First, collect all the PCs that are at this line. */
3429 idx
= find_line_common (SYMTAB_LINETABLE (symtab
), line
, &was_exact
,
3436 struct linetable_entry
*item
= &SYMTAB_LINETABLE (symtab
)->item
[idx
];
3438 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
3444 VEC_safe_push (CORE_ADDR
, result
,
3445 SYMTAB_LINETABLE (symtab
)->item
[idx
].pc
);
3453 /* Set the PC value for a given source file and line number and return true.
3454 Returns zero for invalid line number (and sets the PC to 0).
3455 The source file is specified with a struct symtab. */
3458 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
3460 struct linetable
*l
;
3467 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
3470 l
= SYMTAB_LINETABLE (symtab
);
3471 *pc
= l
->item
[ind
].pc
;
3478 /* Find the range of pc values in a line.
3479 Store the starting pc of the line into *STARTPTR
3480 and the ending pc (start of next line) into *ENDPTR.
3481 Returns 1 to indicate success.
3482 Returns 0 if could not find the specified line. */
3485 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
3488 CORE_ADDR startaddr
;
3489 struct symtab_and_line found_sal
;
3492 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
3495 /* This whole function is based on address. For example, if line 10 has
3496 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
3497 "info line *0x123" should say the line goes from 0x100 to 0x200
3498 and "info line *0x355" should say the line goes from 0x300 to 0x400.
3499 This also insures that we never give a range like "starts at 0x134
3500 and ends at 0x12c". */
3502 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
3503 if (found_sal
.line
!= sal
.line
)
3505 /* The specified line (sal) has zero bytes. */
3506 *startptr
= found_sal
.pc
;
3507 *endptr
= found_sal
.pc
;
3511 *startptr
= found_sal
.pc
;
3512 *endptr
= found_sal
.end
;
3517 /* Given a line table and a line number, return the index into the line
3518 table for the pc of the nearest line whose number is >= the specified one.
3519 Return -1 if none is found. The value is >= 0 if it is an index.
3520 START is the index at which to start searching the line table.
3522 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
3525 find_line_common (struct linetable
*l
, int lineno
,
3526 int *exact_match
, int start
)
3531 /* BEST is the smallest linenumber > LINENO so far seen,
3532 or 0 if none has been seen so far.
3533 BEST_INDEX identifies the item for it. */
3535 int best_index
= -1;
3546 for (i
= start
; i
< len
; i
++)
3548 struct linetable_entry
*item
= &(l
->item
[i
]);
3550 if (item
->line
== lineno
)
3552 /* Return the first (lowest address) entry which matches. */
3557 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
3564 /* If we got here, we didn't get an exact match. */
3569 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
3571 struct symtab_and_line sal
;
3573 sal
= find_pc_line (pc
, 0);
3576 return sal
.symtab
!= 0;
3579 /* Given a function symbol SYM, find the symtab and line for the start
3581 If the argument FUNFIRSTLINE is nonzero, we want the first line
3582 of real code inside the function. */
3584 struct symtab_and_line
3585 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
3587 struct symtab_and_line sal
;
3588 struct obj_section
*section
;
3590 fixup_symbol_section (sym
, NULL
);
3591 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sym
), sym
);
3592 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)), section
, 0);
3594 /* We always should have a line for the function start address.
3595 If we don't, something is odd. Create a plain SAL refering
3596 just the PC and hope that skip_prologue_sal (if requested)
3597 can find a line number for after the prologue. */
3598 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
3601 sal
.pspace
= current_program_space
;
3602 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3603 sal
.section
= section
;
3607 skip_prologue_sal (&sal
);
3612 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
3613 address for that function that has an entry in SYMTAB's line info
3614 table. If such an entry cannot be found, return FUNC_ADDR
3618 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
3620 CORE_ADDR func_start
, func_end
;
3621 struct linetable
*l
;
3624 /* Give up if this symbol has no lineinfo table. */
3625 l
= SYMTAB_LINETABLE (symtab
);
3629 /* Get the range for the function's PC values, or give up if we
3630 cannot, for some reason. */
3631 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
3634 /* Linetable entries are ordered by PC values, see the commentary in
3635 symtab.h where `struct linetable' is defined. Thus, the first
3636 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
3637 address we are looking for. */
3638 for (i
= 0; i
< l
->nitems
; i
++)
3640 struct linetable_entry
*item
= &(l
->item
[i
]);
3642 /* Don't use line numbers of zero, they mark special entries in
3643 the table. See the commentary on symtab.h before the
3644 definition of struct linetable. */
3645 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
3652 /* Adjust SAL to the first instruction past the function prologue.
3653 If the PC was explicitly specified, the SAL is not changed.
3654 If the line number was explicitly specified, at most the SAL's PC
3655 is updated. If SAL is already past the prologue, then do nothing. */
3658 skip_prologue_sal (struct symtab_and_line
*sal
)
3661 struct symtab_and_line start_sal
;
3662 struct cleanup
*old_chain
;
3663 CORE_ADDR pc
, saved_pc
;
3664 struct obj_section
*section
;
3666 struct objfile
*objfile
;
3667 struct gdbarch
*gdbarch
;
3668 const struct block
*b
, *function_block
;
3669 int force_skip
, skip
;
3671 /* Do not change the SAL if PC was specified explicitly. */
3672 if (sal
->explicit_pc
)
3675 old_chain
= save_current_space_and_thread ();
3676 switch_to_program_space_and_thread (sal
->pspace
);
3678 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
3681 fixup_symbol_section (sym
, NULL
);
3683 objfile
= symbol_objfile (sym
);
3684 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3685 section
= SYMBOL_OBJ_SECTION (objfile
, sym
);
3686 name
= SYMBOL_LINKAGE_NAME (sym
);
3690 struct bound_minimal_symbol msymbol
3691 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
3693 if (msymbol
.minsym
== NULL
)
3695 do_cleanups (old_chain
);
3699 objfile
= msymbol
.objfile
;
3700 pc
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
3701 section
= MSYMBOL_OBJ_SECTION (objfile
, msymbol
.minsym
);
3702 name
= MSYMBOL_LINKAGE_NAME (msymbol
.minsym
);
3705 gdbarch
= get_objfile_arch (objfile
);
3707 /* Process the prologue in two passes. In the first pass try to skip the
3708 prologue (SKIP is true) and verify there is a real need for it (indicated
3709 by FORCE_SKIP). If no such reason was found run a second pass where the
3710 prologue is not skipped (SKIP is false). */
3715 /* Be conservative - allow direct PC (without skipping prologue) only if we
3716 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
3717 have to be set by the caller so we use SYM instead. */
3719 && COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (symbol_symtab (sym
))))
3727 /* If the function is in an unmapped overlay, use its unmapped LMA address,
3728 so that gdbarch_skip_prologue has something unique to work on. */
3729 if (section_is_overlay (section
) && !section_is_mapped (section
))
3730 pc
= overlay_unmapped_address (pc
, section
);
3732 /* Skip "first line" of function (which is actually its prologue). */
3733 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3734 if (gdbarch_skip_entrypoint_p (gdbarch
))
3735 pc
= gdbarch_skip_entrypoint (gdbarch
, pc
);
3737 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
3739 /* For overlays, map pc back into its mapped VMA range. */
3740 pc
= overlay_mapped_address (pc
, section
);
3742 /* Calculate line number. */
3743 start_sal
= find_pc_sect_line (pc
, section
, 0);
3745 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
3746 line is still part of the same function. */
3747 if (skip
&& start_sal
.pc
!= pc
3748 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
3749 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
3750 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
).minsym
3751 == lookup_minimal_symbol_by_pc_section (pc
, section
).minsym
)))
3753 /* First pc of next line */
3755 /* Recalculate the line number (might not be N+1). */
3756 start_sal
= find_pc_sect_line (pc
, section
, 0);
3759 /* On targets with executable formats that don't have a concept of
3760 constructors (ELF with .init has, PE doesn't), gcc emits a call
3761 to `__main' in `main' between the prologue and before user
3763 if (gdbarch_skip_main_prologue_p (gdbarch
)
3764 && name
&& strcmp_iw (name
, "main") == 0)
3766 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
3767 /* Recalculate the line number (might not be N+1). */
3768 start_sal
= find_pc_sect_line (pc
, section
, 0);
3772 while (!force_skip
&& skip
--);
3774 /* If we still don't have a valid source line, try to find the first
3775 PC in the lineinfo table that belongs to the same function. This
3776 happens with COFF debug info, which does not seem to have an
3777 entry in lineinfo table for the code after the prologue which has
3778 no direct relation to source. For example, this was found to be
3779 the case with the DJGPP target using "gcc -gcoff" when the
3780 compiler inserted code after the prologue to make sure the stack
3782 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
3784 pc
= skip_prologue_using_lineinfo (pc
, symbol_symtab (sym
));
3785 /* Recalculate the line number. */
3786 start_sal
= find_pc_sect_line (pc
, section
, 0);
3789 do_cleanups (old_chain
);
3791 /* If we're already past the prologue, leave SAL unchanged. Otherwise
3792 forward SAL to the end of the prologue. */
3797 sal
->section
= section
;
3799 /* Unless the explicit_line flag was set, update the SAL line
3800 and symtab to correspond to the modified PC location. */
3801 if (sal
->explicit_line
)
3804 sal
->symtab
= start_sal
.symtab
;
3805 sal
->line
= start_sal
.line
;
3806 sal
->end
= start_sal
.end
;
3808 /* Check if we are now inside an inlined function. If we can,
3809 use the call site of the function instead. */
3810 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
3811 function_block
= NULL
;
3814 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3816 else if (BLOCK_FUNCTION (b
) != NULL
)
3818 b
= BLOCK_SUPERBLOCK (b
);
3820 if (function_block
!= NULL
3821 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
3823 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
3824 sal
->symtab
= symbol_symtab (BLOCK_FUNCTION (function_block
));
3828 /* Given PC at the function's start address, attempt to find the
3829 prologue end using SAL information. Return zero if the skip fails.
3831 A non-optimized prologue traditionally has one SAL for the function
3832 and a second for the function body. A single line function has
3833 them both pointing at the same line.
3835 An optimized prologue is similar but the prologue may contain
3836 instructions (SALs) from the instruction body. Need to skip those
3837 while not getting into the function body.
3839 The functions end point and an increasing SAL line are used as
3840 indicators of the prologue's endpoint.
3842 This code is based on the function refine_prologue_limit
3846 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
3848 struct symtab_and_line prologue_sal
;
3851 const struct block
*bl
;
3853 /* Get an initial range for the function. */
3854 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
3855 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3857 prologue_sal
= find_pc_line (start_pc
, 0);
3858 if (prologue_sal
.line
!= 0)
3860 /* For languages other than assembly, treat two consecutive line
3861 entries at the same address as a zero-instruction prologue.
3862 The GNU assembler emits separate line notes for each instruction
3863 in a multi-instruction macro, but compilers generally will not
3865 if (prologue_sal
.symtab
->language
!= language_asm
)
3867 struct linetable
*linetable
= SYMTAB_LINETABLE (prologue_sal
.symtab
);
3870 /* Skip any earlier lines, and any end-of-sequence marker
3871 from a previous function. */
3872 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
3873 || linetable
->item
[idx
].line
== 0)
3876 if (idx
+1 < linetable
->nitems
3877 && linetable
->item
[idx
+1].line
!= 0
3878 && linetable
->item
[idx
+1].pc
== start_pc
)
3882 /* If there is only one sal that covers the entire function,
3883 then it is probably a single line function, like
3885 if (prologue_sal
.end
>= end_pc
)
3888 while (prologue_sal
.end
< end_pc
)
3890 struct symtab_and_line sal
;
3892 sal
= find_pc_line (prologue_sal
.end
, 0);
3895 /* Assume that a consecutive SAL for the same (or larger)
3896 line mark the prologue -> body transition. */
3897 if (sal
.line
>= prologue_sal
.line
)
3899 /* Likewise if we are in a different symtab altogether
3900 (e.g. within a file included via #include). */
3901 if (sal
.symtab
!= prologue_sal
.symtab
)
3904 /* The line number is smaller. Check that it's from the
3905 same function, not something inlined. If it's inlined,
3906 then there is no point comparing the line numbers. */
3907 bl
= block_for_pc (prologue_sal
.end
);
3910 if (block_inlined_p (bl
))
3912 if (BLOCK_FUNCTION (bl
))
3917 bl
= BLOCK_SUPERBLOCK (bl
);
3922 /* The case in which compiler's optimizer/scheduler has
3923 moved instructions into the prologue. We look ahead in
3924 the function looking for address ranges whose
3925 corresponding line number is less the first one that we
3926 found for the function. This is more conservative then
3927 refine_prologue_limit which scans a large number of SALs
3928 looking for any in the prologue. */
3933 if (prologue_sal
.end
< end_pc
)
3934 /* Return the end of this line, or zero if we could not find a
3936 return prologue_sal
.end
;
3938 /* Don't return END_PC, which is past the end of the function. */
3939 return prologue_sal
.pc
;
3942 /* If P is of the form "operator[ \t]+..." where `...' is
3943 some legitimate operator text, return a pointer to the
3944 beginning of the substring of the operator text.
3945 Otherwise, return "". */
3948 operator_chars (const char *p
, const char **end
)
3951 if (strncmp (p
, "operator", 8))
3955 /* Don't get faked out by `operator' being part of a longer
3957 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
3960 /* Allow some whitespace between `operator' and the operator symbol. */
3961 while (*p
== ' ' || *p
== '\t')
3964 /* Recognize 'operator TYPENAME'. */
3966 if (isalpha (*p
) || *p
== '_' || *p
== '$')
3968 const char *q
= p
+ 1;
3970 while (isalnum (*q
) || *q
== '_' || *q
== '$')
3979 case '\\': /* regexp quoting */
3982 if (p
[2] == '=') /* 'operator\*=' */
3984 else /* 'operator\*' */
3988 else if (p
[1] == '[')
3991 error (_("mismatched quoting on brackets, "
3992 "try 'operator\\[\\]'"));
3993 else if (p
[2] == '\\' && p
[3] == ']')
3995 *end
= p
+ 4; /* 'operator\[\]' */
3999 error (_("nothing is allowed between '[' and ']'"));
4003 /* Gratuitous qoute: skip it and move on. */
4025 if (p
[0] == '-' && p
[1] == '>')
4027 /* Struct pointer member operator 'operator->'. */
4030 *end
= p
+ 3; /* 'operator->*' */
4033 else if (p
[2] == '\\')
4035 *end
= p
+ 4; /* Hopefully 'operator->\*' */
4040 *end
= p
+ 2; /* 'operator->' */
4044 if (p
[1] == '=' || p
[1] == p
[0])
4055 error (_("`operator ()' must be specified "
4056 "without whitespace in `()'"));
4061 error (_("`operator ?:' must be specified "
4062 "without whitespace in `?:'"));
4067 error (_("`operator []' must be specified "
4068 "without whitespace in `[]'"));
4072 error (_("`operator %s' not supported"), p
);
4081 /* Cache to watch for file names already seen by filename_seen. */
4083 struct filename_seen_cache
4085 /* Table of files seen so far. */
4087 /* Initial size of the table. It automagically grows from here. */
4088 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
4091 /* filename_seen_cache constructor. */
4093 static struct filename_seen_cache
*
4094 create_filename_seen_cache (void)
4096 struct filename_seen_cache
*cache
;
4098 cache
= XNEW (struct filename_seen_cache
);
4099 cache
->tab
= htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE
,
4100 filename_hash
, filename_eq
,
4101 NULL
, xcalloc
, xfree
);
4106 /* Empty the cache, but do not delete it. */
4109 clear_filename_seen_cache (struct filename_seen_cache
*cache
)
4111 htab_empty (cache
->tab
);
4114 /* filename_seen_cache destructor.
4115 This takes a void * argument as it is generally used as a cleanup. */
4118 delete_filename_seen_cache (void *ptr
)
4120 struct filename_seen_cache
*cache
= ptr
;
4122 htab_delete (cache
->tab
);
4126 /* If FILE is not already in the table of files in CACHE, return zero;
4127 otherwise return non-zero. Optionally add FILE to the table if ADD
4130 NOTE: We don't manage space for FILE, we assume FILE lives as long
4131 as the caller needs. */
4134 filename_seen (struct filename_seen_cache
*cache
, const char *file
, int add
)
4138 /* Is FILE in tab? */
4139 slot
= htab_find_slot (cache
->tab
, file
, add
? INSERT
: NO_INSERT
);
4143 /* No; maybe add it to tab. */
4145 *slot
= (char *) file
;
4150 /* Data structure to maintain printing state for output_source_filename. */
4152 struct output_source_filename_data
4154 /* Cache of what we've seen so far. */
4155 struct filename_seen_cache
*filename_seen_cache
;
4157 /* Flag of whether we're printing the first one. */
4161 /* Slave routine for sources_info. Force line breaks at ,'s.
4162 NAME is the name to print.
4163 DATA contains the state for printing and watching for duplicates. */
4166 output_source_filename (const char *name
,
4167 struct output_source_filename_data
*data
)
4169 /* Since a single source file can result in several partial symbol
4170 tables, we need to avoid printing it more than once. Note: if
4171 some of the psymtabs are read in and some are not, it gets
4172 printed both under "Source files for which symbols have been
4173 read" and "Source files for which symbols will be read in on
4174 demand". I consider this a reasonable way to deal with the
4175 situation. I'm not sure whether this can also happen for
4176 symtabs; it doesn't hurt to check. */
4178 /* Was NAME already seen? */
4179 if (filename_seen (data
->filename_seen_cache
, name
, 1))
4181 /* Yes; don't print it again. */
4185 /* No; print it and reset *FIRST. */
4187 printf_filtered (", ");
4191 fputs_filtered (name
, gdb_stdout
);
4194 /* A callback for map_partial_symbol_filenames. */
4197 output_partial_symbol_filename (const char *filename
, const char *fullname
,
4200 output_source_filename (fullname
? fullname
: filename
, data
);
4204 sources_info (char *ignore
, int from_tty
)
4206 struct compunit_symtab
*cu
;
4208 struct objfile
*objfile
;
4209 struct output_source_filename_data data
;
4210 struct cleanup
*cleanups
;
4212 if (!have_full_symbols () && !have_partial_symbols ())
4214 error (_("No symbol table is loaded. Use the \"file\" command."));
4217 data
.filename_seen_cache
= create_filename_seen_cache ();
4218 cleanups
= make_cleanup (delete_filename_seen_cache
,
4219 data
.filename_seen_cache
);
4221 printf_filtered ("Source files for which symbols have been read in:\n\n");
4224 ALL_FILETABS (objfile
, cu
, s
)
4226 const char *fullname
= symtab_to_fullname (s
);
4228 output_source_filename (fullname
, &data
);
4230 printf_filtered ("\n\n");
4232 printf_filtered ("Source files for which symbols "
4233 "will be read in on demand:\n\n");
4235 clear_filename_seen_cache (data
.filename_seen_cache
);
4237 map_symbol_filenames (output_partial_symbol_filename
, &data
,
4238 1 /*need_fullname*/);
4239 printf_filtered ("\n");
4241 do_cleanups (cleanups
);
4244 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
4245 non-zero compare only lbasename of FILES. */
4248 file_matches (const char *file
, const char *files
[], int nfiles
, int basenames
)
4252 if (file
!= NULL
&& nfiles
!= 0)
4254 for (i
= 0; i
< nfiles
; i
++)
4256 if (compare_filenames_for_search (file
, (basenames
4257 ? lbasename (files
[i
])
4262 else if (nfiles
== 0)
4267 /* Free any memory associated with a search. */
4270 free_search_symbols (struct symbol_search
*symbols
)
4272 struct symbol_search
*p
;
4273 struct symbol_search
*next
;
4275 for (p
= symbols
; p
!= NULL
; p
= next
)
4283 do_free_search_symbols_cleanup (void *symbolsp
)
4285 struct symbol_search
*symbols
= *(struct symbol_search
**) symbolsp
;
4287 free_search_symbols (symbols
);
4291 make_cleanup_free_search_symbols (struct symbol_search
**symbolsp
)
4293 return make_cleanup (do_free_search_symbols_cleanup
, symbolsp
);
4296 /* Helper function for sort_search_symbols_remove_dups and qsort. Can only
4297 sort symbols, not minimal symbols. */
4300 compare_search_syms (const void *sa
, const void *sb
)
4302 struct symbol_search
*sym_a
= *(struct symbol_search
**) sa
;
4303 struct symbol_search
*sym_b
= *(struct symbol_search
**) sb
;
4306 c
= FILENAME_CMP (symbol_symtab (sym_a
->symbol
)->filename
,
4307 symbol_symtab (sym_b
->symbol
)->filename
);
4311 if (sym_a
->block
!= sym_b
->block
)
4312 return sym_a
->block
- sym_b
->block
;
4314 return strcmp (SYMBOL_PRINT_NAME (sym_a
->symbol
),
4315 SYMBOL_PRINT_NAME (sym_b
->symbol
));
4318 /* Sort the NFOUND symbols in list FOUND and remove duplicates.
4319 The duplicates are freed, and the new list is returned in
4320 *NEW_HEAD, *NEW_TAIL. */
4323 sort_search_symbols_remove_dups (struct symbol_search
*found
, int nfound
,
4324 struct symbol_search
**new_head
,
4325 struct symbol_search
**new_tail
)
4327 struct symbol_search
**symbols
, *symp
, *old_next
;
4330 gdb_assert (found
!= NULL
&& nfound
> 0);
4332 /* Build an array out of the list so we can easily sort them. */
4333 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
4336 for (i
= 0; i
< nfound
; i
++)
4338 gdb_assert (symp
!= NULL
);
4339 gdb_assert (symp
->block
>= 0 && symp
->block
<= 1);
4343 gdb_assert (symp
== NULL
);
4345 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
4346 compare_search_syms
);
4348 /* Collapse out the dups. */
4349 for (i
= 1, j
= 1; i
< nfound
; ++i
)
4351 if (compare_search_syms (&symbols
[j
- 1], &symbols
[i
]) != 0)
4352 symbols
[j
++] = symbols
[i
];
4357 symbols
[j
- 1]->next
= NULL
;
4359 /* Rebuild the linked list. */
4360 for (i
= 0; i
< nunique
- 1; i
++)
4361 symbols
[i
]->next
= symbols
[i
+ 1];
4362 symbols
[nunique
- 1]->next
= NULL
;
4364 *new_head
= symbols
[0];
4365 *new_tail
= symbols
[nunique
- 1];
4369 /* An object of this type is passed as the user_data to the
4370 expand_symtabs_matching method. */
4371 struct search_symbols_data
4376 /* It is true if PREG contains valid data, false otherwise. */
4377 unsigned preg_p
: 1;
4381 /* A callback for expand_symtabs_matching. */
4384 search_symbols_file_matches (const char *filename
, void *user_data
,
4387 struct search_symbols_data
*data
= user_data
;
4389 return file_matches (filename
, data
->files
, data
->nfiles
, basenames
);
4392 /* A callback for expand_symtabs_matching. */
4395 search_symbols_name_matches (const char *symname
, void *user_data
)
4397 struct search_symbols_data
*data
= user_data
;
4399 return !data
->preg_p
|| regexec (&data
->preg
, symname
, 0, NULL
, 0) == 0;
4402 /* Search the symbol table for matches to the regular expression REGEXP,
4403 returning the results in *MATCHES.
4405 Only symbols of KIND are searched:
4406 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
4407 and constants (enums)
4408 FUNCTIONS_DOMAIN - search all functions
4409 TYPES_DOMAIN - search all type names
4410 ALL_DOMAIN - an internal error for this function
4412 free_search_symbols should be called when *MATCHES is no longer needed.
4414 Within each file the results are sorted locally; each symtab's global and
4415 static blocks are separately alphabetized.
4416 Duplicate entries are removed. */
4419 search_symbols (const char *regexp
, enum search_domain kind
,
4420 int nfiles
, const char *files
[],
4421 struct symbol_search
**matches
)
4423 struct compunit_symtab
*cust
;
4424 const struct blockvector
*bv
;
4427 struct block_iterator iter
;
4429 struct objfile
*objfile
;
4430 struct minimal_symbol
*msymbol
;
4432 static const enum minimal_symbol_type types
[]
4433 = {mst_data
, mst_text
, mst_abs
};
4434 static const enum minimal_symbol_type types2
[]
4435 = {mst_bss
, mst_file_text
, mst_abs
};
4436 static const enum minimal_symbol_type types3
[]
4437 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
4438 static const enum minimal_symbol_type types4
[]
4439 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
4440 enum minimal_symbol_type ourtype
;
4441 enum minimal_symbol_type ourtype2
;
4442 enum minimal_symbol_type ourtype3
;
4443 enum minimal_symbol_type ourtype4
;
4444 struct symbol_search
*found
;
4445 struct symbol_search
*tail
;
4446 struct search_symbols_data datum
;
4449 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
4450 CLEANUP_CHAIN is freed only in the case of an error. */
4451 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
4452 struct cleanup
*retval_chain
;
4454 gdb_assert (kind
<= TYPES_DOMAIN
);
4456 ourtype
= types
[kind
];
4457 ourtype2
= types2
[kind
];
4458 ourtype3
= types3
[kind
];
4459 ourtype4
= types4
[kind
];
4466 /* Make sure spacing is right for C++ operators.
4467 This is just a courtesy to make the matching less sensitive
4468 to how many spaces the user leaves between 'operator'
4469 and <TYPENAME> or <OPERATOR>. */
4471 const char *opname
= operator_chars (regexp
, &opend
);
4476 int fix
= -1; /* -1 means ok; otherwise number of
4479 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
4481 /* There should 1 space between 'operator' and 'TYPENAME'. */
4482 if (opname
[-1] != ' ' || opname
[-2] == ' ')
4487 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
4488 if (opname
[-1] == ' ')
4491 /* If wrong number of spaces, fix it. */
4494 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
4496 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
4501 errcode
= regcomp (&datum
.preg
, regexp
,
4502 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
4506 char *err
= get_regcomp_error (errcode
, &datum
.preg
);
4508 make_cleanup (xfree
, err
);
4509 error (_("Invalid regexp (%s): %s"), err
, regexp
);
4512 make_regfree_cleanup (&datum
.preg
);
4515 /* Search through the partial symtabs *first* for all symbols
4516 matching the regexp. That way we don't have to reproduce all of
4517 the machinery below. */
4519 datum
.nfiles
= nfiles
;
4520 datum
.files
= files
;
4521 expand_symtabs_matching ((nfiles
== 0
4523 : search_symbols_file_matches
),
4524 search_symbols_name_matches
,
4525 NULL
, kind
, &datum
);
4527 /* Here, we search through the minimal symbol tables for functions
4528 and variables that match, and force their symbols to be read.
4529 This is in particular necessary for demangled variable names,
4530 which are no longer put into the partial symbol tables.
4531 The symbol will then be found during the scan of symtabs below.
4533 For functions, find_pc_symtab should succeed if we have debug info
4534 for the function, for variables we have to call
4535 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
4537 If the lookup fails, set found_misc so that we will rescan to print
4538 any matching symbols without debug info.
4539 We only search the objfile the msymbol came from, we no longer search
4540 all objfiles. In large programs (1000s of shared libs) searching all
4541 objfiles is not worth the pain. */
4543 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
4545 ALL_MSYMBOLS (objfile
, msymbol
)
4549 if (msymbol
->created_by_gdb
)
4552 if (MSYMBOL_TYPE (msymbol
) == ourtype
4553 || MSYMBOL_TYPE (msymbol
) == ourtype2
4554 || MSYMBOL_TYPE (msymbol
) == ourtype3
4555 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4558 || regexec (&datum
.preg
, MSYMBOL_NATURAL_NAME (msymbol
), 0,
4561 /* Note: An important side-effect of these lookup functions
4562 is to expand the symbol table if msymbol is found, for the
4563 benefit of the next loop on ALL_COMPUNITS. */
4564 if (kind
== FUNCTIONS_DOMAIN
4565 ? (find_pc_compunit_symtab
4566 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
)) == NULL
)
4567 : (lookup_symbol_in_objfile_from_linkage_name
4568 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
4579 retval_chain
= make_cleanup_free_search_symbols (&found
);
4581 ALL_COMPUNITS (objfile
, cust
)
4583 bv
= COMPUNIT_BLOCKVECTOR (cust
);
4584 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
4586 b
= BLOCKVECTOR_BLOCK (bv
, i
);
4587 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4589 struct symtab
*real_symtab
= symbol_symtab (sym
);
4593 /* Check first sole REAL_SYMTAB->FILENAME. It does not need to be
4594 a substring of symtab_to_fullname as it may contain "./" etc. */
4595 if ((file_matches (real_symtab
->filename
, files
, nfiles
, 0)
4596 || ((basenames_may_differ
4597 || file_matches (lbasename (real_symtab
->filename
),
4599 && file_matches (symtab_to_fullname (real_symtab
),
4602 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (sym
), 0,
4604 && ((kind
== VARIABLES_DOMAIN
4605 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
4606 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
4607 && SYMBOL_CLASS (sym
) != LOC_BLOCK
4608 /* LOC_CONST can be used for more than just enums,
4609 e.g., c++ static const members.
4610 We only want to skip enums here. */
4611 && !(SYMBOL_CLASS (sym
) == LOC_CONST
4612 && (TYPE_CODE (SYMBOL_TYPE (sym
))
4613 == TYPE_CODE_ENUM
)))
4614 || (kind
== FUNCTIONS_DOMAIN
4615 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4616 || (kind
== TYPES_DOMAIN
4617 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
4620 struct symbol_search
*psr
= (struct symbol_search
*)
4621 xmalloc (sizeof (struct symbol_search
));
4624 memset (&psr
->msymbol
, 0, sizeof (psr
->msymbol
));
4639 sort_search_symbols_remove_dups (found
, nfound
, &found
, &tail
);
4640 /* Note: nfound is no longer useful beyond this point. */
4643 /* If there are no eyes, avoid all contact. I mean, if there are
4644 no debug symbols, then add matching minsyms. */
4646 if (found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
4648 ALL_MSYMBOLS (objfile
, msymbol
)
4652 if (msymbol
->created_by_gdb
)
4655 if (MSYMBOL_TYPE (msymbol
) == ourtype
4656 || MSYMBOL_TYPE (msymbol
) == ourtype2
4657 || MSYMBOL_TYPE (msymbol
) == ourtype3
4658 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4661 || regexec (&datum
.preg
, MSYMBOL_NATURAL_NAME (msymbol
), 0,
4664 /* For functions we can do a quick check of whether the
4665 symbol might be found via find_pc_symtab. */
4666 if (kind
!= FUNCTIONS_DOMAIN
4667 || (find_pc_compunit_symtab
4668 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
)) == NULL
))
4670 if (lookup_symbol_in_objfile_from_linkage_name
4671 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
4675 struct symbol_search
*psr
= (struct symbol_search
*)
4676 xmalloc (sizeof (struct symbol_search
));
4678 psr
->msymbol
.minsym
= msymbol
;
4679 psr
->msymbol
.objfile
= objfile
;
4694 discard_cleanups (retval_chain
);
4695 do_cleanups (old_chain
);
4699 /* Helper function for symtab_symbol_info, this function uses
4700 the data returned from search_symbols() to print information
4701 regarding the match to gdb_stdout. */
4704 print_symbol_info (enum search_domain kind
,
4706 int block
, const char *last
)
4708 struct symtab
*s
= symbol_symtab (sym
);
4709 const char *s_filename
= symtab_to_filename_for_display (s
);
4711 if (last
== NULL
|| filename_cmp (last
, s_filename
) != 0)
4713 fputs_filtered ("\nFile ", gdb_stdout
);
4714 fputs_filtered (s_filename
, gdb_stdout
);
4715 fputs_filtered (":\n", gdb_stdout
);
4718 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
4719 printf_filtered ("static ");
4721 /* Typedef that is not a C++ class. */
4722 if (kind
== TYPES_DOMAIN
4723 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
4724 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
4725 /* variable, func, or typedef-that-is-c++-class. */
4726 else if (kind
< TYPES_DOMAIN
4727 || (kind
== TYPES_DOMAIN
4728 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
4730 type_print (SYMBOL_TYPE (sym
),
4731 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4732 ? "" : SYMBOL_PRINT_NAME (sym
)),
4735 printf_filtered (";\n");
4739 /* This help function for symtab_symbol_info() prints information
4740 for non-debugging symbols to gdb_stdout. */
4743 print_msymbol_info (struct bound_minimal_symbol msymbol
)
4745 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol
.objfile
);
4748 if (gdbarch_addr_bit (gdbarch
) <= 32)
4749 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
)
4750 & (CORE_ADDR
) 0xffffffff,
4753 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
),
4755 printf_filtered ("%s %s\n",
4756 tmp
, MSYMBOL_PRINT_NAME (msymbol
.minsym
));
4759 /* This is the guts of the commands "info functions", "info types", and
4760 "info variables". It calls search_symbols to find all matches and then
4761 print_[m]symbol_info to print out some useful information about the
4765 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
4767 static const char * const classnames
[] =
4768 {"variable", "function", "type"};
4769 struct symbol_search
*symbols
;
4770 struct symbol_search
*p
;
4771 struct cleanup
*old_chain
;
4772 const char *last_filename
= NULL
;
4775 gdb_assert (kind
<= TYPES_DOMAIN
);
4777 /* Must make sure that if we're interrupted, symbols gets freed. */
4778 search_symbols (regexp
, kind
, 0, NULL
, &symbols
);
4779 old_chain
= make_cleanup_free_search_symbols (&symbols
);
4782 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
4783 classnames
[kind
], regexp
);
4785 printf_filtered (_("All defined %ss:\n"), classnames
[kind
]);
4787 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
4791 if (p
->msymbol
.minsym
!= NULL
)
4795 printf_filtered (_("\nNon-debugging symbols:\n"));
4798 print_msymbol_info (p
->msymbol
);
4802 print_symbol_info (kind
,
4807 = symtab_to_filename_for_display (symbol_symtab (p
->symbol
));
4811 do_cleanups (old_chain
);
4815 variables_info (char *regexp
, int from_tty
)
4817 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
4821 functions_info (char *regexp
, int from_tty
)
4823 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
4828 types_info (char *regexp
, int from_tty
)
4830 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
4833 /* Breakpoint all functions matching regular expression. */
4836 rbreak_command_wrapper (char *regexp
, int from_tty
)
4838 rbreak_command (regexp
, from_tty
);
4841 /* A cleanup function that calls end_rbreak_breakpoints. */
4844 do_end_rbreak_breakpoints (void *ignore
)
4846 end_rbreak_breakpoints ();
4850 rbreak_command (char *regexp
, int from_tty
)
4852 struct symbol_search
*ss
;
4853 struct symbol_search
*p
;
4854 struct cleanup
*old_chain
;
4855 char *string
= NULL
;
4857 const char **files
= NULL
;
4858 const char *file_name
;
4863 char *colon
= strchr (regexp
, ':');
4865 if (colon
&& *(colon
+ 1) != ':')
4870 colon_index
= colon
- regexp
;
4871 local_name
= alloca (colon_index
+ 1);
4872 memcpy (local_name
, regexp
, colon_index
);
4873 local_name
[colon_index
--] = 0;
4874 while (isspace (local_name
[colon_index
]))
4875 local_name
[colon_index
--] = 0;
4876 file_name
= local_name
;
4879 regexp
= skip_spaces (colon
+ 1);
4883 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
4884 old_chain
= make_cleanup_free_search_symbols (&ss
);
4885 make_cleanup (free_current_contents
, &string
);
4887 start_rbreak_breakpoints ();
4888 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
4889 for (p
= ss
; p
!= NULL
; p
= p
->next
)
4891 if (p
->msymbol
.minsym
== NULL
)
4893 struct symtab
*symtab
= symbol_symtab (p
->symbol
);
4894 const char *fullname
= symtab_to_fullname (symtab
);
4896 int newlen
= (strlen (fullname
)
4897 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
4902 string
= xrealloc (string
, newlen
);
4905 strcpy (string
, fullname
);
4906 strcat (string
, ":'");
4907 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
4908 strcat (string
, "'");
4909 break_command (string
, from_tty
);
4910 print_symbol_info (FUNCTIONS_DOMAIN
,
4913 symtab_to_filename_for_display (symtab
));
4917 int newlen
= (strlen (MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
)) + 3);
4921 string
= xrealloc (string
, newlen
);
4924 strcpy (string
, "'");
4925 strcat (string
, MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
));
4926 strcat (string
, "'");
4928 break_command (string
, from_tty
);
4929 printf_filtered ("<function, no debug info> %s;\n",
4930 MSYMBOL_PRINT_NAME (p
->msymbol
.minsym
));
4934 do_cleanups (old_chain
);
4938 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
4940 Either sym_text[sym_text_len] != '(' and then we search for any
4941 symbol starting with SYM_TEXT text.
4943 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
4944 be terminated at that point. Partial symbol tables do not have parameters
4948 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
4950 int (*ncmp
) (const char *, const char *, size_t);
4952 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
4954 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
4957 if (sym_text
[sym_text_len
] == '(')
4959 /* User searches for `name(someth...'. Require NAME to be terminated.
4960 Normally psymtabs and gdbindex have no parameter types so '\0' will be
4961 present but accept even parameters presence. In this case this
4962 function is in fact strcmp_iw but whitespace skipping is not supported
4963 for tab completion. */
4965 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
4972 /* Free any memory associated with a completion list. */
4975 free_completion_list (VEC (char_ptr
) **list_ptr
)
4980 for (i
= 0; VEC_iterate (char_ptr
, *list_ptr
, i
, p
); ++i
)
4982 VEC_free (char_ptr
, *list_ptr
);
4985 /* Callback for make_cleanup. */
4988 do_free_completion_list (void *list
)
4990 free_completion_list (list
);
4993 /* Helper routine for make_symbol_completion_list. */
4995 static VEC (char_ptr
) *return_val
;
4997 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
4998 completion_list_add_name \
4999 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
5001 #define MCOMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
5002 completion_list_add_name \
5003 (MSYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
5005 /* Tracker for how many unique completions have been generated. Used
5006 to terminate completion list generation early if the list has grown
5007 to a size so large as to be useless. This helps avoid GDB seeming
5008 to lock up in the event the user requests to complete on something
5009 vague that necessitates the time consuming expansion of many symbol
5012 static completion_tracker_t completion_tracker
;
5014 /* Test to see if the symbol specified by SYMNAME (which is already
5015 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
5016 characters. If so, add it to the current completion list. */
5019 completion_list_add_name (const char *symname
,
5020 const char *sym_text
, int sym_text_len
,
5021 const char *text
, const char *word
)
5023 /* Clip symbols that cannot match. */
5024 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
5027 /* We have a match for a completion, so add SYMNAME to the current list
5028 of matches. Note that the name is moved to freshly malloc'd space. */
5032 enum maybe_add_completion_enum add_status
;
5034 if (word
== sym_text
)
5036 new = xmalloc (strlen (symname
) + 5);
5037 strcpy (new, symname
);
5039 else if (word
> sym_text
)
5041 /* Return some portion of symname. */
5042 new = xmalloc (strlen (symname
) + 5);
5043 strcpy (new, symname
+ (word
- sym_text
));
5047 /* Return some of SYM_TEXT plus symname. */
5048 new = xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
5049 strncpy (new, word
, sym_text
- word
);
5050 new[sym_text
- word
] = '\0';
5051 strcat (new, symname
);
5054 add_status
= maybe_add_completion (completion_tracker
, new);
5058 case MAYBE_ADD_COMPLETION_OK
:
5059 VEC_safe_push (char_ptr
, return_val
, new);
5061 case MAYBE_ADD_COMPLETION_OK_MAX_REACHED
:
5062 VEC_safe_push (char_ptr
, return_val
, new);
5063 throw_max_completions_reached_error ();
5064 case MAYBE_ADD_COMPLETION_MAX_REACHED
:
5065 throw_max_completions_reached_error ();
5066 case MAYBE_ADD_COMPLETION_DUPLICATE
:
5073 /* ObjC: In case we are completing on a selector, look as the msymbol
5074 again and feed all the selectors into the mill. */
5077 completion_list_objc_symbol (struct minimal_symbol
*msymbol
,
5078 const char *sym_text
, int sym_text_len
,
5079 const char *text
, const char *word
)
5081 static char *tmp
= NULL
;
5082 static unsigned int tmplen
= 0;
5084 const char *method
, *category
, *selector
;
5087 method
= MSYMBOL_NATURAL_NAME (msymbol
);
5089 /* Is it a method? */
5090 if ((method
[0] != '-') && (method
[0] != '+'))
5093 if (sym_text
[0] == '[')
5094 /* Complete on shortened method method. */
5095 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
5097 while ((strlen (method
) + 1) >= tmplen
)
5103 tmp
= xrealloc (tmp
, tmplen
);
5105 selector
= strchr (method
, ' ');
5106 if (selector
!= NULL
)
5109 category
= strchr (method
, '(');
5111 if ((category
!= NULL
) && (selector
!= NULL
))
5113 memcpy (tmp
, method
, (category
- method
));
5114 tmp
[category
- method
] = ' ';
5115 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
5116 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
5117 if (sym_text
[0] == '[')
5118 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
5121 if (selector
!= NULL
)
5123 /* Complete on selector only. */
5124 strcpy (tmp
, selector
);
5125 tmp2
= strchr (tmp
, ']');
5129 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
5133 /* Break the non-quoted text based on the characters which are in
5134 symbols. FIXME: This should probably be language-specific. */
5137 language_search_unquoted_string (const char *text
, const char *p
)
5139 for (; p
> text
; --p
)
5141 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
5145 if ((current_language
->la_language
== language_objc
))
5147 if (p
[-1] == ':') /* Might be part of a method name. */
5149 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
5150 p
-= 2; /* Beginning of a method name. */
5151 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
5152 { /* Might be part of a method name. */
5155 /* Seeing a ' ' or a '(' is not conclusive evidence
5156 that we are in the middle of a method name. However,
5157 finding "-[" or "+[" should be pretty un-ambiguous.
5158 Unfortunately we have to find it now to decide. */
5161 if (isalnum (t
[-1]) || t
[-1] == '_' ||
5162 t
[-1] == ' ' || t
[-1] == ':' ||
5163 t
[-1] == '(' || t
[-1] == ')')
5168 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
5169 p
= t
- 2; /* Method name detected. */
5170 /* Else we leave with p unchanged. */
5180 completion_list_add_fields (struct symbol
*sym
, const char *sym_text
,
5181 int sym_text_len
, const char *text
,
5184 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
5186 struct type
*t
= SYMBOL_TYPE (sym
);
5187 enum type_code c
= TYPE_CODE (t
);
5190 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
5191 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
5192 if (TYPE_FIELD_NAME (t
, j
))
5193 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
5194 sym_text
, sym_text_len
, text
, word
);
5198 /* Type of the user_data argument passed to add_macro_name,
5199 symbol_completion_matcher and symtab_expansion_callback. */
5201 struct add_name_data
5203 /* Arguments required by completion_list_add_name. */
5204 const char *sym_text
;
5209 /* Extra argument required for add_symtab_completions. */
5210 enum type_code code
;
5213 /* A callback used with macro_for_each and macro_for_each_in_scope.
5214 This adds a macro's name to the current completion list. */
5217 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
5218 struct macro_source_file
*ignore2
, int ignore3
,
5221 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
5223 completion_list_add_name (name
,
5224 datum
->sym_text
, datum
->sym_text_len
,
5225 datum
->text
, datum
->word
);
5228 /* A callback for expand_symtabs_matching. */
5231 symbol_completion_matcher (const char *name
, void *user_data
)
5233 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
5235 return compare_symbol_name (name
, datum
->sym_text
, datum
->sym_text_len
);
5238 /* Add matching symbols from SYMTAB to the current completion list. */
5241 add_symtab_completions (struct compunit_symtab
*cust
,
5242 const char *sym_text
, int sym_text_len
,
5243 const char *text
, const char *word
,
5244 enum type_code code
)
5247 const struct block
*b
;
5248 struct block_iterator iter
;
5251 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
5254 b
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), i
);
5255 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5257 if (code
== TYPE_CODE_UNDEF
5258 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5259 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
5260 COMPLETION_LIST_ADD_SYMBOL (sym
,
5261 sym_text
, sym_text_len
,
5267 /* Callback to add completions to the current list when symbol tables
5268 are expanded during completion list generation. */
5271 symtab_expansion_callback (struct compunit_symtab
*symtab
,
5274 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
5276 add_symtab_completions (symtab
,
5277 datum
->sym_text
, datum
->sym_text_len
,
5278 datum
->text
, datum
->word
,
5283 default_make_symbol_completion_list_break_on_1 (const char *text
,
5285 const char *break_on
,
5286 enum type_code code
)
5288 /* Problem: All of the symbols have to be copied because readline
5289 frees them. I'm not going to worry about this; hopefully there
5290 won't be that many. */
5293 struct compunit_symtab
*cust
;
5294 struct minimal_symbol
*msymbol
;
5295 struct objfile
*objfile
;
5296 const struct block
*b
;
5297 const struct block
*surrounding_static_block
, *surrounding_global_block
;
5298 struct block_iterator iter
;
5299 /* The symbol we are completing on. Points in same buffer as text. */
5300 const char *sym_text
;
5301 /* Length of sym_text. */
5303 struct add_name_data datum
;
5304 struct cleanup
*cleanups
;
5306 /* Now look for the symbol we are supposed to complete on. */
5310 const char *quote_pos
= NULL
;
5312 /* First see if this is a quoted string. */
5314 for (p
= text
; *p
!= '\0'; ++p
)
5316 if (quote_found
!= '\0')
5318 if (*p
== quote_found
)
5319 /* Found close quote. */
5321 else if (*p
== '\\' && p
[1] == quote_found
)
5322 /* A backslash followed by the quote character
5323 doesn't end the string. */
5326 else if (*p
== '\'' || *p
== '"')
5332 if (quote_found
== '\'')
5333 /* A string within single quotes can be a symbol, so complete on it. */
5334 sym_text
= quote_pos
+ 1;
5335 else if (quote_found
== '"')
5336 /* A double-quoted string is never a symbol, nor does it make sense
5337 to complete it any other way. */
5343 /* It is not a quoted string. Break it based on the characters
5344 which are in symbols. */
5347 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
5348 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
5357 sym_text_len
= strlen (sym_text
);
5359 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
5361 if (current_language
->la_language
== language_cplus
5362 || current_language
->la_language
== language_java
5363 || current_language
->la_language
== language_fortran
)
5365 /* These languages may have parameters entered by user but they are never
5366 present in the partial symbol tables. */
5368 const char *cs
= memchr (sym_text
, '(', sym_text_len
);
5371 sym_text_len
= cs
- sym_text
;
5373 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
5375 completion_tracker
= new_completion_tracker ();
5376 cleanups
= make_cleanup_free_completion_tracker (&completion_tracker
);
5378 datum
.sym_text
= sym_text
;
5379 datum
.sym_text_len
= sym_text_len
;
5384 /* At this point scan through the misc symbol vectors and add each
5385 symbol you find to the list. Eventually we want to ignore
5386 anything that isn't a text symbol (everything else will be
5387 handled by the psymtab code below). */
5389 if (code
== TYPE_CODE_UNDEF
)
5391 ALL_MSYMBOLS (objfile
, msymbol
)
5394 MCOMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
,
5397 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
,
5402 /* Add completions for all currently loaded symbol tables. */
5403 ALL_COMPUNITS (objfile
, cust
)
5404 add_symtab_completions (cust
, sym_text
, sym_text_len
, text
, word
,
5407 /* Look through the partial symtabs for all symbols which begin
5408 by matching SYM_TEXT. Expand all CUs that you find to the list.
5409 symtab_expansion_callback is called for each expanded symtab,
5410 causing those symtab's completions to be added to the list too. */
5411 expand_symtabs_matching (NULL
, symbol_completion_matcher
,
5412 symtab_expansion_callback
, ALL_DOMAIN
,
5415 /* Search upwards from currently selected frame (so that we can
5416 complete on local vars). Also catch fields of types defined in
5417 this places which match our text string. Only complete on types
5418 visible from current context. */
5420 b
= get_selected_block (0);
5421 surrounding_static_block
= block_static_block (b
);
5422 surrounding_global_block
= block_global_block (b
);
5423 if (surrounding_static_block
!= NULL
)
5424 while (b
!= surrounding_static_block
)
5428 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5430 if (code
== TYPE_CODE_UNDEF
)
5432 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
5434 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
5437 else if (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5438 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
5439 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
5443 /* Stop when we encounter an enclosing function. Do not stop for
5444 non-inlined functions - the locals of the enclosing function
5445 are in scope for a nested function. */
5446 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
5448 b
= BLOCK_SUPERBLOCK (b
);
5451 /* Add fields from the file's types; symbols will be added below. */
5453 if (code
== TYPE_CODE_UNDEF
)
5455 if (surrounding_static_block
!= NULL
)
5456 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
5457 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
5459 if (surrounding_global_block
!= NULL
)
5460 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
5461 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
5464 /* Skip macros if we are completing a struct tag -- arguable but
5465 usually what is expected. */
5466 if (current_language
->la_macro_expansion
== macro_expansion_c
5467 && code
== TYPE_CODE_UNDEF
)
5469 struct macro_scope
*scope
;
5471 /* Add any macros visible in the default scope. Note that this
5472 may yield the occasional wrong result, because an expression
5473 might be evaluated in a scope other than the default. For
5474 example, if the user types "break file:line if <TAB>", the
5475 resulting expression will be evaluated at "file:line" -- but
5476 at there does not seem to be a way to detect this at
5478 scope
= default_macro_scope ();
5481 macro_for_each_in_scope (scope
->file
, scope
->line
,
5482 add_macro_name
, &datum
);
5486 /* User-defined macros are always visible. */
5487 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
5490 do_cleanups (cleanups
);
5494 default_make_symbol_completion_list_break_on (const char *text
,
5496 const char *break_on
,
5497 enum type_code code
)
5499 struct cleanup
*back_to
;
5500 volatile struct gdb_exception except
;
5503 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
5505 TRY_CATCH (except
, RETURN_MASK_ERROR
)
5507 default_make_symbol_completion_list_break_on_1 (text
, word
,
5510 if (except
.reason
< 0)
5512 if (except
.error
!= MAX_COMPLETIONS_REACHED_ERROR
)
5513 throw_exception (except
);
5516 discard_cleanups (back_to
);
5521 default_make_symbol_completion_list (const char *text
, const char *word
,
5522 enum type_code code
)
5524 return default_make_symbol_completion_list_break_on (text
, word
, "", code
);
5527 /* Return a vector of all symbols (regardless of class) which begin by
5528 matching TEXT. If the answer is no symbols, then the return value
5532 make_symbol_completion_list (const char *text
, const char *word
)
5534 return current_language
->la_make_symbol_completion_list (text
, word
,
5538 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
5539 symbols whose type code is CODE. */
5542 make_symbol_completion_type (const char *text
, const char *word
,
5543 enum type_code code
)
5545 gdb_assert (code
== TYPE_CODE_UNION
5546 || code
== TYPE_CODE_STRUCT
5547 || code
== TYPE_CODE_ENUM
);
5548 return current_language
->la_make_symbol_completion_list (text
, word
, code
);
5551 /* Like make_symbol_completion_list, but suitable for use as a
5552 completion function. */
5555 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
5556 const char *text
, const char *word
)
5558 return make_symbol_completion_list (text
, word
);
5561 /* Like make_symbol_completion_list, but returns a list of symbols
5562 defined in a source file FILE. */
5565 make_file_symbol_completion_list (const char *text
, const char *word
,
5566 const char *srcfile
)
5571 struct block_iterator iter
;
5572 /* The symbol we are completing on. Points in same buffer as text. */
5573 const char *sym_text
;
5574 /* Length of sym_text. */
5577 /* Now look for the symbol we are supposed to complete on.
5578 FIXME: This should be language-specific. */
5582 const char *quote_pos
= NULL
;
5584 /* First see if this is a quoted string. */
5586 for (p
= text
; *p
!= '\0'; ++p
)
5588 if (quote_found
!= '\0')
5590 if (*p
== quote_found
)
5591 /* Found close quote. */
5593 else if (*p
== '\\' && p
[1] == quote_found
)
5594 /* A backslash followed by the quote character
5595 doesn't end the string. */
5598 else if (*p
== '\'' || *p
== '"')
5604 if (quote_found
== '\'')
5605 /* A string within single quotes can be a symbol, so complete on it. */
5606 sym_text
= quote_pos
+ 1;
5607 else if (quote_found
== '"')
5608 /* A double-quoted string is never a symbol, nor does it make sense
5609 to complete it any other way. */
5615 /* Not a quoted string. */
5616 sym_text
= language_search_unquoted_string (text
, p
);
5620 sym_text_len
= strlen (sym_text
);
5624 /* Find the symtab for SRCFILE (this loads it if it was not yet read
5626 s
= lookup_symtab (srcfile
);
5629 /* Maybe they typed the file with leading directories, while the
5630 symbol tables record only its basename. */
5631 const char *tail
= lbasename (srcfile
);
5634 s
= lookup_symtab (tail
);
5637 /* If we have no symtab for that file, return an empty list. */
5639 return (return_val
);
5641 /* Go through this symtab and check the externs and statics for
5642 symbols which match. */
5644 b
= BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (s
), GLOBAL_BLOCK
);
5645 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5647 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
5650 b
= BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (s
), STATIC_BLOCK
);
5651 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5653 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
5656 return (return_val
);
5659 /* A helper function for make_source_files_completion_list. It adds
5660 another file name to a list of possible completions, growing the
5661 list as necessary. */
5664 add_filename_to_list (const char *fname
, const char *text
, const char *word
,
5665 VEC (char_ptr
) **list
)
5668 size_t fnlen
= strlen (fname
);
5672 /* Return exactly fname. */
5673 new = xmalloc (fnlen
+ 5);
5674 strcpy (new, fname
);
5676 else if (word
> text
)
5678 /* Return some portion of fname. */
5679 new = xmalloc (fnlen
+ 5);
5680 strcpy (new, fname
+ (word
- text
));
5684 /* Return some of TEXT plus fname. */
5685 new = xmalloc (fnlen
+ (text
- word
) + 5);
5686 strncpy (new, word
, text
- word
);
5687 new[text
- word
] = '\0';
5688 strcat (new, fname
);
5690 VEC_safe_push (char_ptr
, *list
, new);
5694 not_interesting_fname (const char *fname
)
5696 static const char *illegal_aliens
[] = {
5697 "_globals_", /* inserted by coff_symtab_read */
5702 for (i
= 0; illegal_aliens
[i
]; i
++)
5704 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
5710 /* An object of this type is passed as the user_data argument to
5711 map_partial_symbol_filenames. */
5712 struct add_partial_filename_data
5714 struct filename_seen_cache
*filename_seen_cache
;
5718 VEC (char_ptr
) **list
;
5721 /* A callback for map_partial_symbol_filenames. */
5724 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
5727 struct add_partial_filename_data
*data
= user_data
;
5729 if (not_interesting_fname (filename
))
5731 if (!filename_seen (data
->filename_seen_cache
, filename
, 1)
5732 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
5734 /* This file matches for a completion; add it to the
5735 current list of matches. */
5736 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
5740 const char *base_name
= lbasename (filename
);
5742 if (base_name
!= filename
5743 && !filename_seen (data
->filename_seen_cache
, base_name
, 1)
5744 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
5745 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
5749 /* Return a vector of all source files whose names begin with matching
5750 TEXT. The file names are looked up in the symbol tables of this
5751 program. If the answer is no matchess, then the return value is
5755 make_source_files_completion_list (const char *text
, const char *word
)
5757 struct compunit_symtab
*cu
;
5759 struct objfile
*objfile
;
5760 size_t text_len
= strlen (text
);
5761 VEC (char_ptr
) *list
= NULL
;
5762 const char *base_name
;
5763 struct add_partial_filename_data datum
;
5764 struct filename_seen_cache
*filename_seen_cache
;
5765 struct cleanup
*back_to
, *cache_cleanup
;
5767 if (!have_full_symbols () && !have_partial_symbols ())
5770 back_to
= make_cleanup (do_free_completion_list
, &list
);
5772 filename_seen_cache
= create_filename_seen_cache ();
5773 cache_cleanup
= make_cleanup (delete_filename_seen_cache
,
5774 filename_seen_cache
);
5776 ALL_FILETABS (objfile
, cu
, s
)
5778 if (not_interesting_fname (s
->filename
))
5780 if (!filename_seen (filename_seen_cache
, s
->filename
, 1)
5781 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
5783 /* This file matches for a completion; add it to the current
5785 add_filename_to_list (s
->filename
, text
, word
, &list
);
5789 /* NOTE: We allow the user to type a base name when the
5790 debug info records leading directories, but not the other
5791 way around. This is what subroutines of breakpoint
5792 command do when they parse file names. */
5793 base_name
= lbasename (s
->filename
);
5794 if (base_name
!= s
->filename
5795 && !filename_seen (filename_seen_cache
, base_name
, 1)
5796 && filename_ncmp (base_name
, text
, text_len
) == 0)
5797 add_filename_to_list (base_name
, text
, word
, &list
);
5801 datum
.filename_seen_cache
= filename_seen_cache
;
5804 datum
.text_len
= text_len
;
5806 map_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
5807 0 /*need_fullname*/);
5809 do_cleanups (cache_cleanup
);
5810 discard_cleanups (back_to
);
5817 /* Return the "main_info" object for the current program space. If
5818 the object has not yet been created, create it and fill in some
5821 static struct main_info
*
5822 get_main_info (void)
5824 struct main_info
*info
= program_space_data (current_program_space
,
5825 main_progspace_key
);
5829 /* It may seem strange to store the main name in the progspace
5830 and also in whatever objfile happens to see a main name in
5831 its debug info. The reason for this is mainly historical:
5832 gdb returned "main" as the name even if no function named
5833 "main" was defined the program; and this approach lets us
5834 keep compatibility. */
5835 info
= XCNEW (struct main_info
);
5836 info
->language_of_main
= language_unknown
;
5837 set_program_space_data (current_program_space
, main_progspace_key
,
5844 /* A cleanup to destroy a struct main_info when a progspace is
5848 main_info_cleanup (struct program_space
*pspace
, void *data
)
5850 struct main_info
*info
= data
;
5853 xfree (info
->name_of_main
);
5858 set_main_name (const char *name
, enum language lang
)
5860 struct main_info
*info
= get_main_info ();
5862 if (info
->name_of_main
!= NULL
)
5864 xfree (info
->name_of_main
);
5865 info
->name_of_main
= NULL
;
5866 info
->language_of_main
= language_unknown
;
5870 info
->name_of_main
= xstrdup (name
);
5871 info
->language_of_main
= lang
;
5875 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
5879 find_main_name (void)
5881 const char *new_main_name
;
5882 struct objfile
*objfile
;
5884 /* First check the objfiles to see whether a debuginfo reader has
5885 picked up the appropriate main name. Historically the main name
5886 was found in a more or less random way; this approach instead
5887 relies on the order of objfile creation -- which still isn't
5888 guaranteed to get the correct answer, but is just probably more
5890 ALL_OBJFILES (objfile
)
5892 if (objfile
->per_bfd
->name_of_main
!= NULL
)
5894 set_main_name (objfile
->per_bfd
->name_of_main
,
5895 objfile
->per_bfd
->language_of_main
);
5900 /* Try to see if the main procedure is in Ada. */
5901 /* FIXME: brobecker/2005-03-07: Another way of doing this would
5902 be to add a new method in the language vector, and call this
5903 method for each language until one of them returns a non-empty
5904 name. This would allow us to remove this hard-coded call to
5905 an Ada function. It is not clear that this is a better approach
5906 at this point, because all methods need to be written in a way
5907 such that false positives never be returned. For instance, it is
5908 important that a method does not return a wrong name for the main
5909 procedure if the main procedure is actually written in a different
5910 language. It is easy to guaranty this with Ada, since we use a
5911 special symbol generated only when the main in Ada to find the name
5912 of the main procedure. It is difficult however to see how this can
5913 be guarantied for languages such as C, for instance. This suggests
5914 that order of call for these methods becomes important, which means
5915 a more complicated approach. */
5916 new_main_name
= ada_main_name ();
5917 if (new_main_name
!= NULL
)
5919 set_main_name (new_main_name
, language_ada
);
5923 new_main_name
= d_main_name ();
5924 if (new_main_name
!= NULL
)
5926 set_main_name (new_main_name
, language_d
);
5930 new_main_name
= go_main_name ();
5931 if (new_main_name
!= NULL
)
5933 set_main_name (new_main_name
, language_go
);
5937 new_main_name
= pascal_main_name ();
5938 if (new_main_name
!= NULL
)
5940 set_main_name (new_main_name
, language_pascal
);
5944 /* The languages above didn't identify the name of the main procedure.
5945 Fallback to "main". */
5946 set_main_name ("main", language_unknown
);
5952 struct main_info
*info
= get_main_info ();
5954 if (info
->name_of_main
== NULL
)
5957 return info
->name_of_main
;
5960 /* Return the language of the main function. If it is not known,
5961 return language_unknown. */
5964 main_language (void)
5966 struct main_info
*info
= get_main_info ();
5968 if (info
->name_of_main
== NULL
)
5971 return info
->language_of_main
;
5974 /* Handle ``executable_changed'' events for the symtab module. */
5977 symtab_observer_executable_changed (void)
5979 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
5980 set_main_name (NULL
, language_unknown
);
5983 /* Return 1 if the supplied producer string matches the ARM RealView
5984 compiler (armcc). */
5987 producer_is_realview (const char *producer
)
5989 static const char *const arm_idents
[] = {
5990 "ARM C Compiler, ADS",
5991 "Thumb C Compiler, ADS",
5992 "ARM C++ Compiler, ADS",
5993 "Thumb C++ Compiler, ADS",
5994 "ARM/Thumb C/C++ Compiler, RVCT",
5995 "ARM C/C++ Compiler, RVCT"
5999 if (producer
== NULL
)
6002 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
6003 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
6011 /* The next index to hand out in response to a registration request. */
6013 static int next_aclass_value
= LOC_FINAL_VALUE
;
6015 /* The maximum number of "aclass" registrations we support. This is
6016 constant for convenience. */
6017 #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
6019 /* The objects representing the various "aclass" values. The elements
6020 from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
6021 elements are those registered at gdb initialization time. */
6023 static struct symbol_impl symbol_impl
[MAX_SYMBOL_IMPLS
];
6025 /* The globally visible pointer. This is separate from 'symbol_impl'
6026 so that it can be const. */
6028 const struct symbol_impl
*symbol_impls
= &symbol_impl
[0];
6030 /* Make sure we saved enough room in struct symbol. */
6032 gdb_static_assert (MAX_SYMBOL_IMPLS
<= (1 << SYMBOL_ACLASS_BITS
));
6034 /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS
6035 is the ops vector associated with this index. This returns the new
6036 index, which should be used as the aclass_index field for symbols
6040 register_symbol_computed_impl (enum address_class aclass
,
6041 const struct symbol_computed_ops
*ops
)
6043 int result
= next_aclass_value
++;
6045 gdb_assert (aclass
== LOC_COMPUTED
);
6046 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
6047 symbol_impl
[result
].aclass
= aclass
;
6048 symbol_impl
[result
].ops_computed
= ops
;
6050 /* Sanity check OPS. */
6051 gdb_assert (ops
!= NULL
);
6052 gdb_assert (ops
->tracepoint_var_ref
!= NULL
);
6053 gdb_assert (ops
->describe_location
!= NULL
);
6054 gdb_assert (ops
->read_needs_frame
!= NULL
);
6055 gdb_assert (ops
->read_variable
!= NULL
);
6060 /* Register a function with frame base type. ACLASS must be LOC_BLOCK.
6061 OPS is the ops vector associated with this index. This returns the
6062 new index, which should be used as the aclass_index field for symbols
6066 register_symbol_block_impl (enum address_class aclass
,
6067 const struct symbol_block_ops
*ops
)
6069 int result
= next_aclass_value
++;
6071 gdb_assert (aclass
== LOC_BLOCK
);
6072 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
6073 symbol_impl
[result
].aclass
= aclass
;
6074 symbol_impl
[result
].ops_block
= ops
;
6076 /* Sanity check OPS. */
6077 gdb_assert (ops
!= NULL
);
6078 gdb_assert (ops
->find_frame_base_location
!= NULL
);
6083 /* Register a register symbol type. ACLASS must be LOC_REGISTER or
6084 LOC_REGPARM_ADDR. OPS is the register ops vector associated with
6085 this index. This returns the new index, which should be used as
6086 the aclass_index field for symbols of this type. */
6089 register_symbol_register_impl (enum address_class aclass
,
6090 const struct symbol_register_ops
*ops
)
6092 int result
= next_aclass_value
++;
6094 gdb_assert (aclass
== LOC_REGISTER
|| aclass
== LOC_REGPARM_ADDR
);
6095 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
6096 symbol_impl
[result
].aclass
= aclass
;
6097 symbol_impl
[result
].ops_register
= ops
;
6102 /* Initialize elements of 'symbol_impl' for the constants in enum
6106 initialize_ordinary_address_classes (void)
6110 for (i
= 0; i
< LOC_FINAL_VALUE
; ++i
)
6111 symbol_impl
[i
].aclass
= i
;
6116 /* Helper function to initialize the fields of an objfile-owned symbol.
6117 It assumed that *SYM is already all zeroes. */
6120 initialize_objfile_symbol_1 (struct symbol
*sym
)
6122 SYMBOL_OBJFILE_OWNED (sym
) = 1;
6123 SYMBOL_SECTION (sym
) = -1;
6126 /* Initialize the symbol SYM, and mark it as being owned by an objfile. */
6129 initialize_objfile_symbol (struct symbol
*sym
)
6131 memset (sym
, 0, sizeof (*sym
));
6132 initialize_objfile_symbol_1 (sym
);
6135 /* Allocate and initialize a new 'struct symbol' on OBJFILE's
6139 allocate_symbol (struct objfile
*objfile
)
6141 struct symbol
*result
;
6143 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6144 initialize_objfile_symbol_1 (result
);
6149 /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
6152 struct template_symbol
*
6153 allocate_template_symbol (struct objfile
*objfile
)
6155 struct template_symbol
*result
;
6157 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct template_symbol
);
6158 initialize_objfile_symbol_1 (&result
->base
);
6166 symbol_objfile (const struct symbol
*symbol
)
6168 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6169 return SYMTAB_OBJFILE (symbol
->owner
.symtab
);
6175 symbol_arch (const struct symbol
*symbol
)
6177 if (!SYMBOL_OBJFILE_OWNED (symbol
))
6178 return symbol
->owner
.arch
;
6179 return get_objfile_arch (SYMTAB_OBJFILE (symbol
->owner
.symtab
));
6185 symbol_symtab (const struct symbol
*symbol
)
6187 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6188 return symbol
->owner
.symtab
;
6194 symbol_set_symtab (struct symbol
*symbol
, struct symtab
*symtab
)
6196 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6197 symbol
->owner
.symtab
= symtab
;
6203 _initialize_symtab (void)
6205 initialize_ordinary_address_classes ();
6208 = register_program_space_data_with_cleanup (NULL
, main_info_cleanup
);
6211 = register_program_space_data_with_cleanup (NULL
, symbol_cache_cleanup
);
6213 add_info ("variables", variables_info
, _("\
6214 All global and static variable names, or those matching REGEXP."));
6216 add_com ("whereis", class_info
, variables_info
, _("\
6217 All global and static variable names, or those matching REGEXP."));
6219 add_info ("functions", functions_info
,
6220 _("All function names, or those matching REGEXP."));
6222 /* FIXME: This command has at least the following problems:
6223 1. It prints builtin types (in a very strange and confusing fashion).
6224 2. It doesn't print right, e.g. with
6225 typedef struct foo *FOO
6226 type_print prints "FOO" when we want to make it (in this situation)
6227 print "struct foo *".
6228 I also think "ptype" or "whatis" is more likely to be useful (but if
6229 there is much disagreement "info types" can be fixed). */
6230 add_info ("types", types_info
,
6231 _("All type names, or those matching REGEXP."));
6233 add_info ("sources", sources_info
,
6234 _("Source files in the program."));
6236 add_com ("rbreak", class_breakpoint
, rbreak_command
,
6237 _("Set a breakpoint for all functions matching REGEXP."));
6241 add_com ("lf", class_info
, sources_info
,
6242 _("Source files in the program"));
6243 add_com ("lg", class_info
, variables_info
, _("\
6244 All global and static variable names, or those matching REGEXP."));
6247 add_setshow_enum_cmd ("multiple-symbols", no_class
,
6248 multiple_symbols_modes
, &multiple_symbols_mode
,
6250 Set the debugger behavior when more than one symbol are possible matches\n\
6251 in an expression."), _("\
6252 Show how the debugger handles ambiguities in expressions."), _("\
6253 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
6254 NULL
, NULL
, &setlist
, &showlist
);
6256 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
6257 &basenames_may_differ
, _("\
6258 Set whether a source file may have multiple base names."), _("\
6259 Show whether a source file may have multiple base names."), _("\
6260 (A \"base name\" is the name of a file with the directory part removed.\n\
6261 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
6262 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
6263 before comparing them. Canonicalization is an expensive operation,\n\
6264 but it allows the same file be known by more than one base name.\n\
6265 If not set (the default), all source files are assumed to have just\n\
6266 one base name, and gdb will do file name comparisons more efficiently."),
6268 &setlist
, &showlist
);
6270 add_setshow_zuinteger_cmd ("symtab-create", no_class
, &symtab_create_debug
,
6271 _("Set debugging of symbol table creation."),
6272 _("Show debugging of symbol table creation."), _("\
6273 When enabled (non-zero), debugging messages are printed when building\n\
6274 symbol tables. A value of 1 (one) normally provides enough information.\n\
6275 A value greater than 1 provides more verbose information."),
6278 &setdebuglist
, &showdebuglist
);
6280 add_setshow_zuinteger_cmd ("symbol-lookup", no_class
, &symbol_lookup_debug
,
6282 Set debugging of symbol lookup."), _("\
6283 Show debugging of symbol lookup."), _("\
6284 When enabled (non-zero), symbol lookups are logged."),
6286 &setdebuglist
, &showdebuglist
);
6288 add_setshow_zuinteger_cmd ("symbol-cache-size", no_class
,
6289 &new_symbol_cache_size
,
6290 _("Set the size of the symbol cache."),
6291 _("Show the size of the symbol cache."), _("\
6292 The size of the symbol cache.\n\
6293 If zero then the symbol cache is disabled."),
6294 set_symbol_cache_size_handler
, NULL
,
6295 &maintenance_set_cmdlist
,
6296 &maintenance_show_cmdlist
);
6298 add_cmd ("symbol-cache", class_maintenance
, maintenance_print_symbol_cache
,
6299 _("Dump the symbol cache for each program space."),
6300 &maintenanceprintlist
);
6302 add_cmd ("symbol-cache-statistics", class_maintenance
,
6303 maintenance_print_symbol_cache_statistics
,
6304 _("Print symbol cache statistics for each program space."),
6305 &maintenanceprintlist
);
6307 add_cmd ("flush-symbol-cache", class_maintenance
,
6308 maintenance_flush_symbol_cache
,
6309 _("Flush the symbol cache for each program space."),
6312 observer_attach_executable_changed (symtab_observer_executable_changed
);
6313 observer_attach_new_objfile (symtab_new_objfile_observer
);
6314 observer_attach_free_objfile (symtab_free_objfile_observer
);