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 struct symbol_cache_slot
138 enum symbol_cache_slot_state state
;
140 /* The objfile that was current when the symbol was looked up.
141 This is only needed for global blocks, but for simplicity's sake
142 we allocate the space for both. If data shows the extra space used
143 for static blocks is a problem, we can split things up then.
145 Global blocks need cache lookup to include the objfile context because
146 we need to account for gdbarch_iterate_over_objfiles_in_search_order
147 which can traverse objfiles in, effectively, any order, depending on
148 the current objfile, thus affecting which symbol is found. Normally,
149 only the current objfile is searched first, and then the rest are
150 searched in recorded order; but putting cache lookup inside
151 gdbarch_iterate_over_objfiles_in_search_order would be awkward.
152 Instead we just make the current objfile part of the context of
153 cache lookup. This means we can record the same symbol multiple times,
154 each with a different "current objfile" that was in effect when the
155 lookup was saved in the cache, but cache space is pretty cheap. */
156 const struct objfile
*objfile_context
;
160 struct symbol
*found
;
169 /* Symbols don't specify global vs static block.
170 So keep them in separate caches. */
172 struct block_symbol_cache
176 unsigned int collisions
;
178 /* SYMBOLS is a variable length array of this size.
179 One can imagine that in general one cache (global/static) should be a
180 fraction of the size of the other, but there's no data at the moment
181 on which to decide. */
184 struct symbol_cache_slot symbols
[1];
189 Searching for symbols in the static and global blocks over multiple objfiles
190 again and again can be slow, as can searching very big objfiles. This is a
191 simple cache to improve symbol lookup performance, which is critical to
192 overall gdb performance.
194 Symbols are hashed on the name, its domain, and block.
195 They are also hashed on their objfile for objfile-specific lookups. */
199 struct block_symbol_cache
*global_symbols
;
200 struct block_symbol_cache
*static_symbols
;
203 /* When non-zero, print debugging messages related to symtab creation. */
204 unsigned int symtab_create_debug
= 0;
206 /* When non-zero, print debugging messages related to symbol lookup. */
207 unsigned int symbol_lookup_debug
= 0;
209 /* The size of the cache is staged here. */
210 static unsigned int new_symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
212 /* The current value of the symbol cache size.
213 This is saved so that if the user enters a value too big we can restore
214 the original value from here. */
215 static unsigned int symbol_cache_size
= DEFAULT_SYMBOL_CACHE_SIZE
;
217 /* Non-zero if a file may be known by two different basenames.
218 This is the uncommon case, and significantly slows down gdb.
219 Default set to "off" to not slow down the common case. */
220 int basenames_may_differ
= 0;
222 /* Allow the user to configure the debugger behavior with respect
223 to multiple-choice menus when more than one symbol matches during
226 const char multiple_symbols_ask
[] = "ask";
227 const char multiple_symbols_all
[] = "all";
228 const char multiple_symbols_cancel
[] = "cancel";
229 static const char *const multiple_symbols_modes
[] =
231 multiple_symbols_ask
,
232 multiple_symbols_all
,
233 multiple_symbols_cancel
,
236 static const char *multiple_symbols_mode
= multiple_symbols_all
;
238 /* Read-only accessor to AUTO_SELECT_MODE. */
241 multiple_symbols_select_mode (void)
243 return multiple_symbols_mode
;
246 /* Block in which the most recently searched-for symbol was found.
247 Might be better to make this a parameter to lookup_symbol and
250 const struct block
*block_found
;
252 /* Return the name of a domain_enum. */
255 domain_name (domain_enum e
)
259 case UNDEF_DOMAIN
: return "UNDEF_DOMAIN";
260 case VAR_DOMAIN
: return "VAR_DOMAIN";
261 case STRUCT_DOMAIN
: return "STRUCT_DOMAIN";
262 case MODULE_DOMAIN
: return "MODULE_DOMAIN";
263 case LABEL_DOMAIN
: return "LABEL_DOMAIN";
264 case COMMON_BLOCK_DOMAIN
: return "COMMON_BLOCK_DOMAIN";
265 default: gdb_assert_not_reached ("bad domain_enum");
269 /* Return the name of a search_domain . */
272 search_domain_name (enum search_domain e
)
276 case VARIABLES_DOMAIN
: return "VARIABLES_DOMAIN";
277 case FUNCTIONS_DOMAIN
: return "FUNCTIONS_DOMAIN";
278 case TYPES_DOMAIN
: return "TYPES_DOMAIN";
279 case ALL_DOMAIN
: return "ALL_DOMAIN";
280 default: gdb_assert_not_reached ("bad search_domain");
287 compunit_primary_filetab (const struct compunit_symtab
*cust
)
289 gdb_assert (COMPUNIT_FILETABS (cust
) != NULL
);
291 /* The primary file symtab is the first one in the list. */
292 return COMPUNIT_FILETABS (cust
);
298 compunit_language (const struct compunit_symtab
*cust
)
300 struct symtab
*symtab
= compunit_primary_filetab (cust
);
302 /* The language of the compunit symtab is the language of its primary
304 return SYMTAB_LANGUAGE (symtab
);
307 /* See whether FILENAME matches SEARCH_NAME using the rule that we
308 advertise to the user. (The manual's description of linespecs
309 describes what we advertise). Returns true if they match, false
313 compare_filenames_for_search (const char *filename
, const char *search_name
)
315 int len
= strlen (filename
);
316 size_t search_len
= strlen (search_name
);
318 if (len
< search_len
)
321 /* The tail of FILENAME must match. */
322 if (FILENAME_CMP (filename
+ len
- search_len
, search_name
) != 0)
325 /* Either the names must completely match, or the character
326 preceding the trailing SEARCH_NAME segment of FILENAME must be a
329 The check !IS_ABSOLUTE_PATH ensures SEARCH_NAME "/dir/file.c"
330 cannot match FILENAME "/path//dir/file.c" - as user has requested
331 absolute path. The sama applies for "c:\file.c" possibly
332 incorrectly hypothetically matching "d:\dir\c:\file.c".
334 The HAS_DRIVE_SPEC purpose is to make FILENAME "c:file.c"
335 compatible with SEARCH_NAME "file.c". In such case a compiler had
336 to put the "c:file.c" name into debug info. Such compatibility
337 works only on GDB built for DOS host. */
338 return (len
== search_len
339 || (!IS_ABSOLUTE_PATH (search_name
)
340 && IS_DIR_SEPARATOR (filename
[len
- search_len
- 1]))
341 || (HAS_DRIVE_SPEC (filename
)
342 && STRIP_DRIVE_SPEC (filename
) == &filename
[len
- search_len
]));
345 /* Check for a symtab of a specific name by searching some symtabs.
346 This is a helper function for callbacks of iterate_over_symtabs.
348 If NAME is not absolute, then REAL_PATH is NULL
349 If NAME is absolute, then REAL_PATH is the gdb_realpath form of NAME.
351 The return value, NAME, REAL_PATH, CALLBACK, and DATA
352 are identical to the `map_symtabs_matching_filename' method of
353 quick_symbol_functions.
355 FIRST and AFTER_LAST indicate the range of compunit symtabs to search.
356 Each symtab within the specified compunit symtab is also searched.
357 AFTER_LAST is one past the last compunit symtab to search; NULL means to
358 search until the end of the list. */
361 iterate_over_some_symtabs (const char *name
,
362 const char *real_path
,
363 int (*callback
) (struct symtab
*symtab
,
366 struct compunit_symtab
*first
,
367 struct compunit_symtab
*after_last
)
369 struct compunit_symtab
*cust
;
371 const char* base_name
= lbasename (name
);
373 for (cust
= first
; cust
!= NULL
&& cust
!= after_last
; cust
= cust
->next
)
375 ALL_COMPUNIT_FILETABS (cust
, s
)
377 if (compare_filenames_for_search (s
->filename
, name
))
379 if (callback (s
, data
))
384 /* Before we invoke realpath, which can get expensive when many
385 files are involved, do a quick comparison of the basenames. */
386 if (! basenames_may_differ
387 && FILENAME_CMP (base_name
, lbasename (s
->filename
)) != 0)
390 if (compare_filenames_for_search (symtab_to_fullname (s
), name
))
392 if (callback (s
, data
))
397 /* If the user gave us an absolute path, try to find the file in
398 this symtab and use its absolute path. */
399 if (real_path
!= NULL
)
401 const char *fullname
= symtab_to_fullname (s
);
403 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
404 gdb_assert (IS_ABSOLUTE_PATH (name
));
405 if (FILENAME_CMP (real_path
, fullname
) == 0)
407 if (callback (s
, data
))
418 /* Check for a symtab of a specific name; first in symtabs, then in
419 psymtabs. *If* there is no '/' in the name, a match after a '/'
420 in the symtab filename will also work.
422 Calls CALLBACK with each symtab that is found and with the supplied
423 DATA. If CALLBACK returns true, the search stops. */
426 iterate_over_symtabs (const char *name
,
427 int (*callback
) (struct symtab
*symtab
,
431 struct objfile
*objfile
;
432 char *real_path
= NULL
;
433 struct cleanup
*cleanups
= make_cleanup (null_cleanup
, NULL
);
435 /* Here we are interested in canonicalizing an absolute path, not
436 absolutizing a relative path. */
437 if (IS_ABSOLUTE_PATH (name
))
439 real_path
= gdb_realpath (name
);
440 make_cleanup (xfree
, real_path
);
441 gdb_assert (IS_ABSOLUTE_PATH (real_path
));
444 ALL_OBJFILES (objfile
)
446 if (iterate_over_some_symtabs (name
, real_path
, callback
, data
,
447 objfile
->compunit_symtabs
, NULL
))
449 do_cleanups (cleanups
);
454 /* Same search rules as above apply here, but now we look thru the
457 ALL_OBJFILES (objfile
)
460 && objfile
->sf
->qf
->map_symtabs_matching_filename (objfile
,
466 do_cleanups (cleanups
);
471 do_cleanups (cleanups
);
474 /* The callback function used by lookup_symtab. */
477 lookup_symtab_callback (struct symtab
*symtab
, void *data
)
479 struct symtab
**result_ptr
= data
;
481 *result_ptr
= symtab
;
485 /* A wrapper for iterate_over_symtabs that returns the first matching
489 lookup_symtab (const char *name
)
491 struct symtab
*result
= NULL
;
493 iterate_over_symtabs (name
, lookup_symtab_callback
, &result
);
498 /* Mangle a GDB method stub type. This actually reassembles the pieces of the
499 full method name, which consist of the class name (from T), the unadorned
500 method name from METHOD_ID, and the signature for the specific overload,
501 specified by SIGNATURE_ID. Note that this function is g++ specific. */
504 gdb_mangle_name (struct type
*type
, int method_id
, int signature_id
)
506 int mangled_name_len
;
508 struct fn_field
*f
= TYPE_FN_FIELDLIST1 (type
, method_id
);
509 struct fn_field
*method
= &f
[signature_id
];
510 const char *field_name
= TYPE_FN_FIELDLIST_NAME (type
, method_id
);
511 const char *physname
= TYPE_FN_FIELD_PHYSNAME (f
, signature_id
);
512 const char *newname
= type_name_no_tag (type
);
514 /* Does the form of physname indicate that it is the full mangled name
515 of a constructor (not just the args)? */
516 int is_full_physname_constructor
;
519 int is_destructor
= is_destructor_name (physname
);
520 /* Need a new type prefix. */
521 char *const_prefix
= method
->is_const
? "C" : "";
522 char *volatile_prefix
= method
->is_volatile
? "V" : "";
524 int len
= (newname
== NULL
? 0 : strlen (newname
));
526 /* Nothing to do if physname already contains a fully mangled v3 abi name
527 or an operator name. */
528 if ((physname
[0] == '_' && physname
[1] == 'Z')
529 || is_operator_name (field_name
))
530 return xstrdup (physname
);
532 is_full_physname_constructor
= is_constructor_name (physname
);
534 is_constructor
= is_full_physname_constructor
535 || (newname
&& strcmp (field_name
, newname
) == 0);
538 is_destructor
= (strncmp (physname
, "__dt", 4) == 0);
540 if (is_destructor
|| is_full_physname_constructor
)
542 mangled_name
= (char *) xmalloc (strlen (physname
) + 1);
543 strcpy (mangled_name
, physname
);
549 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
551 else if (physname
[0] == 't' || physname
[0] == 'Q')
553 /* The physname for template and qualified methods already includes
555 xsnprintf (buf
, sizeof (buf
), "__%s%s", const_prefix
, volatile_prefix
);
561 xsnprintf (buf
, sizeof (buf
), "__%s%s%d", const_prefix
,
562 volatile_prefix
, len
);
564 mangled_name_len
= ((is_constructor
? 0 : strlen (field_name
))
565 + strlen (buf
) + len
+ strlen (physname
) + 1);
567 mangled_name
= (char *) xmalloc (mangled_name_len
);
569 mangled_name
[0] = '\0';
571 strcpy (mangled_name
, field_name
);
573 strcat (mangled_name
, buf
);
574 /* If the class doesn't have a name, i.e. newname NULL, then we just
575 mangle it using 0 for the length of the class. Thus it gets mangled
576 as something starting with `::' rather than `classname::'. */
578 strcat (mangled_name
, newname
);
580 strcat (mangled_name
, physname
);
581 return (mangled_name
);
584 /* Set the demangled name of GSYMBOL to NAME. NAME must be already
585 correctly allocated. */
588 symbol_set_demangled_name (struct general_symbol_info
*gsymbol
,
590 struct obstack
*obstack
)
592 if (gsymbol
->language
== language_ada
)
596 gsymbol
->ada_mangled
= 0;
597 gsymbol
->language_specific
.obstack
= obstack
;
601 gsymbol
->ada_mangled
= 1;
602 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
606 gsymbol
->language_specific
.mangled_lang
.demangled_name
= name
;
609 /* Return the demangled name of GSYMBOL. */
612 symbol_get_demangled_name (const struct general_symbol_info
*gsymbol
)
614 if (gsymbol
->language
== language_ada
)
616 if (!gsymbol
->ada_mangled
)
621 return gsymbol
->language_specific
.mangled_lang
.demangled_name
;
625 /* Initialize the language dependent portion of a symbol
626 depending upon the language for the symbol. */
629 symbol_set_language (struct general_symbol_info
*gsymbol
,
630 enum language language
,
631 struct obstack
*obstack
)
633 gsymbol
->language
= language
;
634 if (gsymbol
->language
== language_cplus
635 || gsymbol
->language
== language_d
636 || gsymbol
->language
== language_go
637 || gsymbol
->language
== language_java
638 || gsymbol
->language
== language_objc
639 || gsymbol
->language
== language_fortran
)
641 symbol_set_demangled_name (gsymbol
, NULL
, obstack
);
643 else if (gsymbol
->language
== language_ada
)
645 gdb_assert (gsymbol
->ada_mangled
== 0);
646 gsymbol
->language_specific
.obstack
= obstack
;
650 memset (&gsymbol
->language_specific
, 0,
651 sizeof (gsymbol
->language_specific
));
655 /* Functions to initialize a symbol's mangled name. */
657 /* Objects of this type are stored in the demangled name hash table. */
658 struct demangled_name_entry
664 /* Hash function for the demangled name hash. */
667 hash_demangled_name_entry (const void *data
)
669 const struct demangled_name_entry
*e
= data
;
671 return htab_hash_string (e
->mangled
);
674 /* Equality function for the demangled name hash. */
677 eq_demangled_name_entry (const void *a
, const void *b
)
679 const struct demangled_name_entry
*da
= a
;
680 const struct demangled_name_entry
*db
= b
;
682 return strcmp (da
->mangled
, db
->mangled
) == 0;
685 /* Create the hash table used for demangled names. Each hash entry is
686 a pair of strings; one for the mangled name and one for the demangled
687 name. The entry is hashed via just the mangled name. */
690 create_demangled_names_hash (struct objfile
*objfile
)
692 /* Choose 256 as the starting size of the hash table, somewhat arbitrarily.
693 The hash table code will round this up to the next prime number.
694 Choosing a much larger table size wastes memory, and saves only about
695 1% in symbol reading. */
697 objfile
->per_bfd
->demangled_names_hash
= htab_create_alloc
698 (256, hash_demangled_name_entry
, eq_demangled_name_entry
,
699 NULL
, xcalloc
, xfree
);
702 /* Try to determine the demangled name for a symbol, based on the
703 language of that symbol. If the language is set to language_auto,
704 it will attempt to find any demangling algorithm that works and
705 then set the language appropriately. The returned name is allocated
706 by the demangler and should be xfree'd. */
709 symbol_find_demangled_name (struct general_symbol_info
*gsymbol
,
712 char *demangled
= NULL
;
714 if (gsymbol
->language
== language_unknown
)
715 gsymbol
->language
= language_auto
;
717 if (gsymbol
->language
== language_objc
718 || gsymbol
->language
== language_auto
)
721 objc_demangle (mangled
, 0);
722 if (demangled
!= NULL
)
724 gsymbol
->language
= language_objc
;
728 if (gsymbol
->language
== language_cplus
729 || gsymbol
->language
== language_auto
)
732 gdb_demangle (mangled
, DMGL_PARAMS
| DMGL_ANSI
);
733 if (demangled
!= NULL
)
735 gsymbol
->language
= language_cplus
;
739 if (gsymbol
->language
== language_java
)
742 gdb_demangle (mangled
,
743 DMGL_PARAMS
| DMGL_ANSI
| DMGL_JAVA
);
744 if (demangled
!= NULL
)
746 gsymbol
->language
= language_java
;
750 if (gsymbol
->language
== language_d
751 || gsymbol
->language
== language_auto
)
753 demangled
= d_demangle(mangled
, 0);
754 if (demangled
!= NULL
)
756 gsymbol
->language
= language_d
;
760 /* FIXME(dje): Continually adding languages here is clumsy.
761 Better to just call la_demangle if !auto, and if auto then call
762 a utility routine that tries successive languages in turn and reports
763 which one it finds. I realize the la_demangle options may be different
764 for different languages but there's already a FIXME for that. */
765 if (gsymbol
->language
== language_go
766 || gsymbol
->language
== language_auto
)
768 demangled
= go_demangle (mangled
, 0);
769 if (demangled
!= NULL
)
771 gsymbol
->language
= language_go
;
776 /* We could support `gsymbol->language == language_fortran' here to provide
777 module namespaces also for inferiors with only minimal symbol table (ELF
778 symbols). Just the mangling standard is not standardized across compilers
779 and there is no DW_AT_producer available for inferiors with only the ELF
780 symbols to check the mangling kind. */
782 /* Check for Ada symbols last. See comment below explaining why. */
784 if (gsymbol
->language
== language_auto
)
786 const char *demangled
= ada_decode (mangled
);
788 if (demangled
!= mangled
&& demangled
!= NULL
&& demangled
[0] != '<')
790 /* Set the gsymbol language to Ada, but still return NULL.
791 Two reasons for that:
793 1. For Ada, we prefer computing the symbol's decoded name
794 on the fly rather than pre-compute it, in order to save
795 memory (Ada projects are typically very large).
797 2. There are some areas in the definition of the GNAT
798 encoding where, with a bit of bad luck, we might be able
799 to decode a non-Ada symbol, generating an incorrect
800 demangled name (Eg: names ending with "TB" for instance
801 are identified as task bodies and so stripped from
802 the decoded name returned).
804 Returning NULL, here, helps us get a little bit of
805 the best of both worlds. Because we're last, we should
806 not affect any of the other languages that were able to
807 demangle the symbol before us; we get to correctly tag
808 Ada symbols as such; and even if we incorrectly tagged
809 a non-Ada symbol, which should be rare, any routing
810 through the Ada language should be transparent (Ada
811 tries to behave much like C/C++ with non-Ada symbols). */
812 gsymbol
->language
= language_ada
;
820 /* Set both the mangled and demangled (if any) names for GSYMBOL based
821 on LINKAGE_NAME and LEN. Ordinarily, NAME is copied onto the
822 objfile's obstack; but if COPY_NAME is 0 and if NAME is
823 NUL-terminated, then this function assumes that NAME is already
824 correctly saved (either permanently or with a lifetime tied to the
825 objfile), and it will not be copied.
827 The hash table corresponding to OBJFILE is used, and the memory
828 comes from the per-BFD storage_obstack. LINKAGE_NAME is copied,
829 so the pointer can be discarded after calling this function. */
831 /* We have to be careful when dealing with Java names: when we run
832 into a Java minimal symbol, we don't know it's a Java symbol, so it
833 gets demangled as a C++ name. This is unfortunate, but there's not
834 much we can do about it: but when demangling partial symbols and
835 regular symbols, we'd better not reuse the wrong demangled name.
836 (See PR gdb/1039.) We solve this by putting a distinctive prefix
837 on Java names when storing them in the hash table. */
839 /* FIXME: carlton/2003-03-13: This is an unfortunate situation. I
840 don't mind the Java prefix so much: different languages have
841 different demangling requirements, so it's only natural that we
842 need to keep language data around in our demangling cache. But
843 it's not good that the minimal symbol has the wrong demangled name.
844 Unfortunately, I can't think of any easy solution to that
847 #define JAVA_PREFIX "##JAVA$$"
848 #define JAVA_PREFIX_LEN 8
851 symbol_set_names (struct general_symbol_info
*gsymbol
,
852 const char *linkage_name
, int len
, int copy_name
,
853 struct objfile
*objfile
)
855 struct demangled_name_entry
**slot
;
856 /* A 0-terminated copy of the linkage name. */
857 const char *linkage_name_copy
;
858 /* A copy of the linkage name that might have a special Java prefix
859 added to it, for use when looking names up in the hash table. */
860 const char *lookup_name
;
861 /* The length of lookup_name. */
863 struct demangled_name_entry entry
;
864 struct objfile_per_bfd_storage
*per_bfd
= objfile
->per_bfd
;
866 if (gsymbol
->language
== language_ada
)
868 /* In Ada, we do the symbol lookups using the mangled name, so
869 we can save some space by not storing the demangled name.
871 As a side note, we have also observed some overlap between
872 the C++ mangling and Ada mangling, similarly to what has
873 been observed with Java. Because we don't store the demangled
874 name with the symbol, we don't need to use the same trick
877 gsymbol
->name
= linkage_name
;
880 char *name
= obstack_alloc (&per_bfd
->storage_obstack
, len
+ 1);
882 memcpy (name
, linkage_name
, len
);
884 gsymbol
->name
= name
;
886 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
891 if (per_bfd
->demangled_names_hash
== NULL
)
892 create_demangled_names_hash (objfile
);
894 /* The stabs reader generally provides names that are not
895 NUL-terminated; most of the other readers don't do this, so we
896 can just use the given copy, unless we're in the Java case. */
897 if (gsymbol
->language
== language_java
)
901 lookup_len
= len
+ JAVA_PREFIX_LEN
;
902 alloc_name
= alloca (lookup_len
+ 1);
903 memcpy (alloc_name
, JAVA_PREFIX
, JAVA_PREFIX_LEN
);
904 memcpy (alloc_name
+ JAVA_PREFIX_LEN
, linkage_name
, len
);
905 alloc_name
[lookup_len
] = '\0';
907 lookup_name
= alloc_name
;
908 linkage_name_copy
= alloc_name
+ JAVA_PREFIX_LEN
;
910 else if (linkage_name
[len
] != '\0')
915 alloc_name
= alloca (lookup_len
+ 1);
916 memcpy (alloc_name
, linkage_name
, len
);
917 alloc_name
[lookup_len
] = '\0';
919 lookup_name
= alloc_name
;
920 linkage_name_copy
= alloc_name
;
925 lookup_name
= linkage_name
;
926 linkage_name_copy
= linkage_name
;
929 entry
.mangled
= lookup_name
;
930 slot
= ((struct demangled_name_entry
**)
931 htab_find_slot (per_bfd
->demangled_names_hash
,
934 /* If this name is not in the hash table, add it. */
936 /* A C version of the symbol may have already snuck into the table.
937 This happens to, e.g., main.init (__go_init_main). Cope. */
938 || (gsymbol
->language
== language_go
939 && (*slot
)->demangled
[0] == '\0'))
941 char *demangled_name
= symbol_find_demangled_name (gsymbol
,
943 int demangled_len
= demangled_name
? strlen (demangled_name
) : 0;
945 /* Suppose we have demangled_name==NULL, copy_name==0, and
946 lookup_name==linkage_name. In this case, we already have the
947 mangled name saved, and we don't have a demangled name. So,
948 you might think we could save a little space by not recording
949 this in the hash table at all.
951 It turns out that it is actually important to still save such
952 an entry in the hash table, because storing this name gives
953 us better bcache hit rates for partial symbols. */
954 if (!copy_name
&& lookup_name
== linkage_name
)
956 *slot
= obstack_alloc (&per_bfd
->storage_obstack
,
957 offsetof (struct demangled_name_entry
,
959 + demangled_len
+ 1);
960 (*slot
)->mangled
= lookup_name
;
966 /* If we must copy the mangled name, put it directly after
967 the demangled name so we can have a single
969 *slot
= obstack_alloc (&per_bfd
->storage_obstack
,
970 offsetof (struct demangled_name_entry
,
972 + lookup_len
+ demangled_len
+ 2);
973 mangled_ptr
= &((*slot
)->demangled
[demangled_len
+ 1]);
974 strcpy (mangled_ptr
, lookup_name
);
975 (*slot
)->mangled
= mangled_ptr
;
978 if (demangled_name
!= NULL
)
980 strcpy ((*slot
)->demangled
, demangled_name
);
981 xfree (demangled_name
);
984 (*slot
)->demangled
[0] = '\0';
987 gsymbol
->name
= (*slot
)->mangled
+ lookup_len
- len
;
988 if ((*slot
)->demangled
[0] != '\0')
989 symbol_set_demangled_name (gsymbol
, (*slot
)->demangled
,
990 &per_bfd
->storage_obstack
);
992 symbol_set_demangled_name (gsymbol
, NULL
, &per_bfd
->storage_obstack
);
995 /* Return the source code name of a symbol. In languages where
996 demangling is necessary, this is the demangled name. */
999 symbol_natural_name (const struct general_symbol_info
*gsymbol
)
1001 switch (gsymbol
->language
)
1003 case language_cplus
:
1008 case language_fortran
:
1009 if (symbol_get_demangled_name (gsymbol
) != NULL
)
1010 return symbol_get_demangled_name (gsymbol
);
1013 return ada_decode_symbol (gsymbol
);
1017 return gsymbol
->name
;
1020 /* Return the demangled name for a symbol based on the language for
1021 that symbol. If no demangled name exists, return NULL. */
1024 symbol_demangled_name (const struct general_symbol_info
*gsymbol
)
1026 const char *dem_name
= NULL
;
1028 switch (gsymbol
->language
)
1030 case language_cplus
:
1035 case language_fortran
:
1036 dem_name
= symbol_get_demangled_name (gsymbol
);
1039 dem_name
= ada_decode_symbol (gsymbol
);
1047 /* Return the search name of a symbol---generally the demangled or
1048 linkage name of the symbol, depending on how it will be searched for.
1049 If there is no distinct demangled name, then returns the same value
1050 (same pointer) as SYMBOL_LINKAGE_NAME. */
1053 symbol_search_name (const struct general_symbol_info
*gsymbol
)
1055 if (gsymbol
->language
== language_ada
)
1056 return gsymbol
->name
;
1058 return symbol_natural_name (gsymbol
);
1061 /* Initialize the structure fields to zero values. */
1064 init_sal (struct symtab_and_line
*sal
)
1066 memset (sal
, 0, sizeof (*sal
));
1070 /* Return 1 if the two sections are the same, or if they could
1071 plausibly be copies of each other, one in an original object
1072 file and another in a separated debug file. */
1075 matching_obj_sections (struct obj_section
*obj_first
,
1076 struct obj_section
*obj_second
)
1078 asection
*first
= obj_first
? obj_first
->the_bfd_section
: NULL
;
1079 asection
*second
= obj_second
? obj_second
->the_bfd_section
: NULL
;
1080 struct objfile
*obj
;
1082 /* If they're the same section, then they match. */
1083 if (first
== second
)
1086 /* If either is NULL, give up. */
1087 if (first
== NULL
|| second
== NULL
)
1090 /* This doesn't apply to absolute symbols. */
1091 if (first
->owner
== NULL
|| second
->owner
== NULL
)
1094 /* If they're in the same object file, they must be different sections. */
1095 if (first
->owner
== second
->owner
)
1098 /* Check whether the two sections are potentially corresponding. They must
1099 have the same size, address, and name. We can't compare section indexes,
1100 which would be more reliable, because some sections may have been
1102 if (bfd_get_section_size (first
) != bfd_get_section_size (second
))
1105 /* In-memory addresses may start at a different offset, relativize them. */
1106 if (bfd_get_section_vma (first
->owner
, first
)
1107 - bfd_get_start_address (first
->owner
)
1108 != bfd_get_section_vma (second
->owner
, second
)
1109 - bfd_get_start_address (second
->owner
))
1112 if (bfd_get_section_name (first
->owner
, first
) == NULL
1113 || bfd_get_section_name (second
->owner
, second
) == NULL
1114 || strcmp (bfd_get_section_name (first
->owner
, first
),
1115 bfd_get_section_name (second
->owner
, second
)) != 0)
1118 /* Otherwise check that they are in corresponding objfiles. */
1121 if (obj
->obfd
== first
->owner
)
1123 gdb_assert (obj
!= NULL
);
1125 if (obj
->separate_debug_objfile
!= NULL
1126 && obj
->separate_debug_objfile
->obfd
== second
->owner
)
1128 if (obj
->separate_debug_objfile_backlink
!= NULL
1129 && obj
->separate_debug_objfile_backlink
->obfd
== second
->owner
)
1138 expand_symtab_containing_pc (CORE_ADDR pc
, struct obj_section
*section
)
1140 struct objfile
*objfile
;
1141 struct bound_minimal_symbol msymbol
;
1143 /* If we know that this is not a text address, return failure. This is
1144 necessary because we loop based on texthigh and textlow, which do
1145 not include the data ranges. */
1146 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
1148 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
1149 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
1150 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
1151 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
1152 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
1155 ALL_OBJFILES (objfile
)
1157 struct compunit_symtab
*cust
= NULL
;
1160 cust
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
, msymbol
,
1167 /* Hash function for the symbol cache. */
1170 hash_symbol_entry (const struct objfile
*objfile_context
,
1171 const char *name
, domain_enum domain
)
1173 unsigned int hash
= (uintptr_t) objfile_context
;
1176 hash
+= htab_hash_string (name
);
1183 /* Equality function for the symbol cache. */
1186 eq_symbol_entry (const struct symbol_cache_slot
*slot
,
1187 const struct objfile
*objfile_context
,
1188 const char *name
, domain_enum domain
)
1190 const char *slot_name
;
1191 domain_enum slot_domain
;
1193 if (slot
->state
== SYMBOL_SLOT_UNUSED
)
1196 if (slot
->objfile_context
!= objfile_context
)
1199 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1201 slot_name
= slot
->value
.not_found
.name
;
1202 slot_domain
= slot
->value
.not_found
.domain
;
1206 slot_name
= SYMBOL_SEARCH_NAME (slot
->value
.found
);
1207 slot_domain
= SYMBOL_DOMAIN (slot
->value
.found
);
1210 /* NULL names match. */
1211 if (slot_name
== NULL
&& name
== NULL
)
1213 /* But there's no point in calling symbol_matches_domain in the
1214 SYMBOL_SLOT_FOUND case. */
1215 if (slot_domain
!= domain
)
1218 else if (slot_name
!= NULL
&& name
!= NULL
)
1220 /* It's important that we use the same comparison that was done the
1221 first time through. If the slot records a found symbol, then this
1222 means using strcmp_iw on SYMBOL_SEARCH_NAME. See dictionary.c.
1223 It also means using symbol_matches_domain for found symbols.
1226 If the slot records a not-found symbol, then require a precise match.
1227 We could still be lax with whitespace like strcmp_iw though. */
1229 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1231 if (strcmp (slot_name
, name
) != 0)
1233 if (slot_domain
!= domain
)
1238 struct symbol
*sym
= slot
->value
.found
;
1240 if (strcmp_iw (slot_name
, name
) != 0)
1242 if (!symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
1243 slot_domain
, domain
))
1249 /* Only one name is NULL. */
1256 /* Given a cache of size SIZE, return the size of the struct (with variable
1257 length array) in bytes. */
1260 symbol_cache_byte_size (unsigned int size
)
1262 return (sizeof (struct block_symbol_cache
)
1263 + ((size
- 1) * sizeof (struct symbol_cache_slot
)));
1269 resize_symbol_cache (struct symbol_cache
*cache
, unsigned int new_size
)
1271 /* If there's no change in size, don't do anything.
1272 All caches have the same size, so we can just compare with the size
1273 of the global symbols cache. */
1274 if ((cache
->global_symbols
!= NULL
1275 && cache
->global_symbols
->size
== new_size
)
1276 || (cache
->global_symbols
== NULL
1280 xfree (cache
->global_symbols
);
1281 xfree (cache
->static_symbols
);
1285 cache
->global_symbols
= NULL
;
1286 cache
->static_symbols
= NULL
;
1290 size_t total_size
= symbol_cache_byte_size (new_size
);
1292 cache
->global_symbols
= xcalloc (1, total_size
);
1293 cache
->static_symbols
= xcalloc (1, total_size
);
1294 cache
->global_symbols
->size
= new_size
;
1295 cache
->static_symbols
->size
= new_size
;
1299 /* Make a symbol cache of size SIZE. */
1301 static struct symbol_cache
*
1302 make_symbol_cache (unsigned int size
)
1304 struct symbol_cache
*cache
;
1306 cache
= XCNEW (struct symbol_cache
);
1307 resize_symbol_cache (cache
, symbol_cache_size
);
1311 /* Free the space used by CACHE. */
1314 free_symbol_cache (struct symbol_cache
*cache
)
1316 xfree (cache
->global_symbols
);
1317 xfree (cache
->static_symbols
);
1321 /* Return the symbol cache of PSPACE.
1322 Create one if it doesn't exist yet. */
1324 static struct symbol_cache
*
1325 get_symbol_cache (struct program_space
*pspace
)
1327 struct symbol_cache
*cache
= program_space_data (pspace
, symbol_cache_key
);
1331 cache
= make_symbol_cache (symbol_cache_size
);
1332 set_program_space_data (pspace
, symbol_cache_key
, cache
);
1338 /* Delete the symbol cache of PSPACE.
1339 Called when PSPACE is destroyed. */
1342 symbol_cache_cleanup (struct program_space
*pspace
, void *data
)
1344 struct symbol_cache
*cache
= data
;
1346 free_symbol_cache (cache
);
1349 /* Set the size of the symbol cache in all program spaces. */
1352 set_symbol_cache_size (unsigned int new_size
)
1354 struct program_space
*pspace
;
1356 ALL_PSPACES (pspace
)
1358 struct symbol_cache
*cache
1359 = program_space_data (pspace
, symbol_cache_key
);
1361 /* The pspace could have been created but not have a cache yet. */
1363 resize_symbol_cache (cache
, new_size
);
1367 /* Called when symbol-cache-size is set. */
1370 set_symbol_cache_size_handler (char *args
, int from_tty
,
1371 struct cmd_list_element
*c
)
1373 if (new_symbol_cache_size
> MAX_SYMBOL_CACHE_SIZE
)
1375 /* Restore the previous value.
1376 This is the value the "show" command prints. */
1377 new_symbol_cache_size
= symbol_cache_size
;
1379 error (_("Symbol cache size is too large, max is %u."),
1380 MAX_SYMBOL_CACHE_SIZE
);
1382 symbol_cache_size
= new_symbol_cache_size
;
1384 set_symbol_cache_size (symbol_cache_size
);
1387 /* Lookup symbol NAME,DOMAIN in BLOCK in the symbol cache of PSPACE.
1388 OBJFILE_CONTEXT is the current objfile, which may be NULL.
1389 The result is the symbol if found, SYMBOL_LOOKUP_FAILED if a previous lookup
1390 failed (and thus this one will too), or NULL if the symbol is not present
1392 *BSC_PTR, *SLOT_PTR are set to the cache and slot of the symbol, whether
1393 found or not found. */
1395 static struct symbol
*
1396 symbol_cache_lookup (struct symbol_cache
*cache
,
1397 struct objfile
*objfile_context
, int block
,
1398 const char *name
, domain_enum domain
,
1399 struct block_symbol_cache
**bsc_ptr
,
1400 struct symbol_cache_slot
**slot_ptr
)
1402 struct block_symbol_cache
*bsc
;
1404 struct symbol_cache_slot
*slot
;
1406 if (block
== GLOBAL_BLOCK
)
1407 bsc
= cache
->global_symbols
;
1409 bsc
= cache
->static_symbols
;
1417 hash
= hash_symbol_entry (objfile_context
, name
, domain
);
1418 slot
= bsc
->symbols
+ hash
% bsc
->size
;
1422 if (eq_symbol_entry (slot
, objfile_context
, name
, domain
))
1424 if (symbol_lookup_debug
)
1425 fprintf_unfiltered (gdb_stdlog
,
1426 "%s block symbol cache hit%s for %s, %s\n",
1427 block
== GLOBAL_BLOCK
? "Global" : "Static",
1428 slot
->state
== SYMBOL_SLOT_NOT_FOUND
1429 ? " (not found)" : "",
1430 name
, domain_name (domain
));
1432 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1433 return SYMBOL_LOOKUP_FAILED
;
1434 return slot
->value
.found
;
1437 if (symbol_lookup_debug
)
1439 fprintf_unfiltered (gdb_stdlog
,
1440 "%s block symbol cache miss for %s, %s\n",
1441 block
== GLOBAL_BLOCK
? "Global" : "Static",
1442 name
, domain_name (domain
));
1448 /* Clear out SLOT. */
1451 symbol_cache_clear_slot (struct symbol_cache_slot
*slot
)
1453 if (slot
->state
== SYMBOL_SLOT_NOT_FOUND
)
1454 xfree (slot
->value
.not_found
.name
);
1455 slot
->state
= SYMBOL_SLOT_UNUSED
;
1458 /* Mark SYMBOL as found in SLOT.
1459 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1460 if it's not needed to distinguish lookups (STATIC_BLOCK). It is *not*
1461 necessarily the objfile the symbol was found in. */
1464 symbol_cache_mark_found (struct block_symbol_cache
*bsc
,
1465 struct symbol_cache_slot
*slot
,
1466 struct objfile
*objfile_context
,
1467 struct symbol
*symbol
)
1471 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1474 symbol_cache_clear_slot (slot
);
1476 slot
->state
= SYMBOL_SLOT_FOUND
;
1477 slot
->objfile_context
= objfile_context
;
1478 slot
->value
.found
= symbol
;
1481 /* Mark symbol NAME, DOMAIN as not found in SLOT.
1482 OBJFILE_CONTEXT is the current objfile when the lookup was done, or NULL
1483 if it's not needed to distinguish lookups (STATIC_BLOCK). */
1486 symbol_cache_mark_not_found (struct block_symbol_cache
*bsc
,
1487 struct symbol_cache_slot
*slot
,
1488 struct objfile
*objfile_context
,
1489 const char *name
, domain_enum domain
)
1493 if (slot
->state
!= SYMBOL_SLOT_UNUSED
)
1496 symbol_cache_clear_slot (slot
);
1498 slot
->state
= SYMBOL_SLOT_NOT_FOUND
;
1499 slot
->objfile_context
= objfile_context
;
1500 slot
->value
.not_found
.name
= xstrdup (name
);
1501 slot
->value
.not_found
.domain
= domain
;
1504 /* Flush the symbol cache of PSPACE. */
1507 symbol_cache_flush (struct program_space
*pspace
)
1509 struct symbol_cache
*cache
= program_space_data (pspace
, symbol_cache_key
);
1515 if (cache
->global_symbols
== NULL
)
1517 gdb_assert (symbol_cache_size
== 0);
1518 gdb_assert (cache
->static_symbols
== NULL
);
1522 /* If the cache is untouched since the last flush, early exit.
1523 This is important for performance during the startup of a program linked
1524 with 100s (or 1000s) of shared libraries. */
1525 if (cache
->global_symbols
->misses
== 0
1526 && cache
->static_symbols
->misses
== 0)
1529 gdb_assert (cache
->global_symbols
->size
== symbol_cache_size
);
1530 gdb_assert (cache
->static_symbols
->size
== symbol_cache_size
);
1532 for (pass
= 0; pass
< 2; ++pass
)
1534 struct block_symbol_cache
*bsc
1535 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1538 for (i
= 0; i
< bsc
->size
; ++i
)
1539 symbol_cache_clear_slot (&bsc
->symbols
[i
]);
1542 cache
->global_symbols
->hits
= 0;
1543 cache
->global_symbols
->misses
= 0;
1544 cache
->global_symbols
->collisions
= 0;
1545 cache
->static_symbols
->hits
= 0;
1546 cache
->static_symbols
->misses
= 0;
1547 cache
->static_symbols
->collisions
= 0;
1553 symbol_cache_dump (const struct symbol_cache
*cache
)
1557 if (cache
->global_symbols
== NULL
)
1559 printf_filtered (" <disabled>\n");
1563 for (pass
= 0; pass
< 2; ++pass
)
1565 const struct block_symbol_cache
*bsc
1566 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1570 printf_filtered ("Global symbols:\n");
1572 printf_filtered ("Static symbols:\n");
1574 for (i
= 0; i
< bsc
->size
; ++i
)
1576 const struct symbol_cache_slot
*slot
= &bsc
->symbols
[i
];
1580 switch (slot
->state
)
1582 case SYMBOL_SLOT_UNUSED
:
1584 case SYMBOL_SLOT_NOT_FOUND
:
1585 printf_filtered (" [%-4u] = %s, %s (not found)\n", i
,
1586 host_address_to_string (slot
->objfile_context
),
1587 slot
->value
.not_found
.name
);
1589 case SYMBOL_SLOT_FOUND
:
1590 printf_filtered (" [%-4u] = %s, %s\n", i
,
1591 host_address_to_string (slot
->objfile_context
),
1592 SYMBOL_PRINT_NAME (slot
->value
.found
));
1599 /* The "mt print symbol-cache" command. */
1602 maintenance_print_symbol_cache (char *args
, int from_tty
)
1604 struct program_space
*pspace
;
1606 ALL_PSPACES (pspace
)
1608 struct symbol_cache
*cache
;
1610 printf_filtered (_("Symbol cache for pspace %d\n%s:\n"),
1612 pspace
->symfile_object_file
!= NULL
1613 ? objfile_name (pspace
->symfile_object_file
)
1614 : "(no object file)");
1616 /* If the cache hasn't been created yet, avoid creating one. */
1617 cache
= program_space_data (pspace
, symbol_cache_key
);
1619 printf_filtered (" <empty>\n");
1621 symbol_cache_dump (cache
);
1625 /* The "mt flush-symbol-cache" command. */
1628 maintenance_flush_symbol_cache (char *args
, int from_tty
)
1630 struct program_space
*pspace
;
1632 ALL_PSPACES (pspace
)
1634 symbol_cache_flush (pspace
);
1638 /* Print usage statistics of CACHE. */
1641 symbol_cache_stats (struct symbol_cache
*cache
)
1645 if (cache
->global_symbols
== NULL
)
1647 printf_filtered (" <disabled>\n");
1651 for (pass
= 0; pass
< 2; ++pass
)
1653 const struct block_symbol_cache
*bsc
1654 = pass
== 0 ? cache
->global_symbols
: cache
->static_symbols
;
1659 printf_filtered ("Global block cache stats:\n");
1661 printf_filtered ("Static block cache stats:\n");
1663 printf_filtered (" size: %u\n", bsc
->size
);
1664 printf_filtered (" hits: %u\n", bsc
->hits
);
1665 printf_filtered (" misses: %u\n", bsc
->misses
);
1666 printf_filtered (" collisions: %u\n", bsc
->collisions
);
1670 /* The "mt print symbol-cache-statistics" command. */
1673 maintenance_print_symbol_cache_statistics (char *args
, int from_tty
)
1675 struct program_space
*pspace
;
1677 ALL_PSPACES (pspace
)
1679 struct symbol_cache
*cache
;
1681 printf_filtered (_("Symbol cache statistics for pspace %d\n%s:\n"),
1683 pspace
->symfile_object_file
!= NULL
1684 ? objfile_name (pspace
->symfile_object_file
)
1685 : "(no object file)");
1687 /* If the cache hasn't been created yet, avoid creating one. */
1688 cache
= program_space_data (pspace
, symbol_cache_key
);
1690 printf_filtered (" empty, no stats available\n");
1692 symbol_cache_stats (cache
);
1696 /* This module's 'new_objfile' observer. */
1699 symtab_new_objfile_observer (struct objfile
*objfile
)
1701 /* Ideally we'd use OBJFILE->pspace, but OBJFILE may be NULL. */
1702 symbol_cache_flush (current_program_space
);
1705 /* This module's 'free_objfile' observer. */
1708 symtab_free_objfile_observer (struct objfile
*objfile
)
1710 symbol_cache_flush (objfile
->pspace
);
1713 /* Debug symbols usually don't have section information. We need to dig that
1714 out of the minimal symbols and stash that in the debug symbol. */
1717 fixup_section (struct general_symbol_info
*ginfo
,
1718 CORE_ADDR addr
, struct objfile
*objfile
)
1720 struct minimal_symbol
*msym
;
1722 /* First, check whether a minimal symbol with the same name exists
1723 and points to the same address. The address check is required
1724 e.g. on PowerPC64, where the minimal symbol for a function will
1725 point to the function descriptor, while the debug symbol will
1726 point to the actual function code. */
1727 msym
= lookup_minimal_symbol_by_pc_name (addr
, ginfo
->name
, objfile
);
1729 ginfo
->section
= MSYMBOL_SECTION (msym
);
1732 /* Static, function-local variables do appear in the linker
1733 (minimal) symbols, but are frequently given names that won't
1734 be found via lookup_minimal_symbol(). E.g., it has been
1735 observed in frv-uclinux (ELF) executables that a static,
1736 function-local variable named "foo" might appear in the
1737 linker symbols as "foo.6" or "foo.3". Thus, there is no
1738 point in attempting to extend the lookup-by-name mechanism to
1739 handle this case due to the fact that there can be multiple
1742 So, instead, search the section table when lookup by name has
1743 failed. The ``addr'' and ``endaddr'' fields may have already
1744 been relocated. If so, the relocation offset (i.e. the
1745 ANOFFSET value) needs to be subtracted from these values when
1746 performing the comparison. We unconditionally subtract it,
1747 because, when no relocation has been performed, the ANOFFSET
1748 value will simply be zero.
1750 The address of the symbol whose section we're fixing up HAS
1751 NOT BEEN adjusted (relocated) yet. It can't have been since
1752 the section isn't yet known and knowing the section is
1753 necessary in order to add the correct relocation value. In
1754 other words, we wouldn't even be in this function (attempting
1755 to compute the section) if it were already known.
1757 Note that it is possible to search the minimal symbols
1758 (subtracting the relocation value if necessary) to find the
1759 matching minimal symbol, but this is overkill and much less
1760 efficient. It is not necessary to find the matching minimal
1761 symbol, only its section.
1763 Note that this technique (of doing a section table search)
1764 can fail when unrelocated section addresses overlap. For
1765 this reason, we still attempt a lookup by name prior to doing
1766 a search of the section table. */
1768 struct obj_section
*s
;
1771 ALL_OBJFILE_OSECTIONS (objfile
, s
)
1773 int idx
= s
- objfile
->sections
;
1774 CORE_ADDR offset
= ANOFFSET (objfile
->section_offsets
, idx
);
1779 if (obj_section_addr (s
) - offset
<= addr
1780 && addr
< obj_section_endaddr (s
) - offset
)
1782 ginfo
->section
= idx
;
1787 /* If we didn't find the section, assume it is in the first
1788 section. If there is no allocated section, then it hardly
1789 matters what we pick, so just pick zero. */
1793 ginfo
->section
= fallback
;
1798 fixup_symbol_section (struct symbol
*sym
, struct objfile
*objfile
)
1805 if (!SYMBOL_OBJFILE_OWNED (sym
))
1808 /* We either have an OBJFILE, or we can get at it from the sym's
1809 symtab. Anything else is a bug. */
1810 gdb_assert (objfile
|| symbol_symtab (sym
));
1812 if (objfile
== NULL
)
1813 objfile
= symbol_objfile (sym
);
1815 if (SYMBOL_OBJ_SECTION (objfile
, sym
))
1818 /* We should have an objfile by now. */
1819 gdb_assert (objfile
);
1821 switch (SYMBOL_CLASS (sym
))
1825 addr
= SYMBOL_VALUE_ADDRESS (sym
);
1828 addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
1832 /* Nothing else will be listed in the minsyms -- no use looking
1837 fixup_section (&sym
->ginfo
, addr
, objfile
);
1842 /* Compute the demangled form of NAME as used by the various symbol
1843 lookup functions. The result is stored in *RESULT_NAME. Returns a
1844 cleanup which can be used to clean up the result.
1846 For Ada, this function just sets *RESULT_NAME to NAME, unmodified.
1847 Normally, Ada symbol lookups are performed using the encoded name
1848 rather than the demangled name, and so it might seem to make sense
1849 for this function to return an encoded version of NAME.
1850 Unfortunately, we cannot do this, because this function is used in
1851 circumstances where it is not appropriate to try to encode NAME.
1852 For instance, when displaying the frame info, we demangle the name
1853 of each parameter, and then perform a symbol lookup inside our
1854 function using that demangled name. In Ada, certain functions
1855 have internally-generated parameters whose name contain uppercase
1856 characters. Encoding those name would result in those uppercase
1857 characters to become lowercase, and thus cause the symbol lookup
1861 demangle_for_lookup (const char *name
, enum language lang
,
1862 const char **result_name
)
1864 char *demangled_name
= NULL
;
1865 const char *modified_name
= NULL
;
1866 struct cleanup
*cleanup
= make_cleanup (null_cleanup
, 0);
1868 modified_name
= name
;
1870 /* If we are using C++, D, Go, or Java, demangle the name before doing a
1871 lookup, so we can always binary search. */
1872 if (lang
== language_cplus
)
1874 demangled_name
= gdb_demangle (name
, DMGL_ANSI
| DMGL_PARAMS
);
1877 modified_name
= demangled_name
;
1878 make_cleanup (xfree
, demangled_name
);
1882 /* If we were given a non-mangled name, canonicalize it
1883 according to the language (so far only for C++). */
1884 demangled_name
= cp_canonicalize_string (name
);
1887 modified_name
= demangled_name
;
1888 make_cleanup (xfree
, demangled_name
);
1892 else if (lang
== language_java
)
1894 demangled_name
= gdb_demangle (name
,
1895 DMGL_ANSI
| DMGL_PARAMS
| DMGL_JAVA
);
1898 modified_name
= demangled_name
;
1899 make_cleanup (xfree
, demangled_name
);
1902 else if (lang
== language_d
)
1904 demangled_name
= d_demangle (name
, 0);
1907 modified_name
= demangled_name
;
1908 make_cleanup (xfree
, demangled_name
);
1911 else if (lang
== language_go
)
1913 demangled_name
= go_demangle (name
, 0);
1916 modified_name
= demangled_name
;
1917 make_cleanup (xfree
, demangled_name
);
1921 *result_name
= modified_name
;
1927 This function (or rather its subordinates) have a bunch of loops and
1928 it would seem to be attractive to put in some QUIT's (though I'm not really
1929 sure whether it can run long enough to be really important). But there
1930 are a few calls for which it would appear to be bad news to quit
1931 out of here: e.g., find_proc_desc in alpha-mdebug-tdep.c. (Note
1932 that there is C++ code below which can error(), but that probably
1933 doesn't affect these calls since they are looking for a known
1934 variable and thus can probably assume it will never hit the C++
1938 lookup_symbol_in_language (const char *name
, const struct block
*block
,
1939 const domain_enum domain
, enum language lang
,
1940 struct field_of_this_result
*is_a_field_of_this
)
1942 const char *modified_name
;
1943 struct symbol
*returnval
;
1944 struct cleanup
*cleanup
= demangle_for_lookup (name
, lang
, &modified_name
);
1946 returnval
= lookup_symbol_aux (modified_name
, block
, domain
, lang
,
1947 is_a_field_of_this
);
1948 do_cleanups (cleanup
);
1956 lookup_symbol (const char *name
, const struct block
*block
,
1958 struct field_of_this_result
*is_a_field_of_this
)
1960 return lookup_symbol_in_language (name
, block
, domain
,
1961 current_language
->la_language
,
1962 is_a_field_of_this
);
1968 lookup_language_this (const struct language_defn
*lang
,
1969 const struct block
*block
)
1971 if (lang
->la_name_of_this
== NULL
|| block
== NULL
)
1974 if (symbol_lookup_debug
> 1)
1976 struct objfile
*objfile
= lookup_objfile_from_block (block
);
1978 fprintf_unfiltered (gdb_stdlog
,
1979 "lookup_language_this (%s, %s (objfile %s))",
1980 lang
->la_name
, host_address_to_string (block
),
1981 objfile_debug_name (objfile
));
1988 sym
= block_lookup_symbol (block
, lang
->la_name_of_this
, VAR_DOMAIN
);
1991 if (symbol_lookup_debug
> 1)
1993 fprintf_unfiltered (gdb_stdlog
, " = %s (%s, block %s)\n",
1994 SYMBOL_PRINT_NAME (sym
),
1995 host_address_to_string (sym
),
1996 host_address_to_string (block
));
1998 block_found
= block
;
2001 if (BLOCK_FUNCTION (block
))
2003 block
= BLOCK_SUPERBLOCK (block
);
2006 if (symbol_lookup_debug
> 1)
2007 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2011 /* Given TYPE, a structure/union,
2012 return 1 if the component named NAME from the ultimate target
2013 structure/union is defined, otherwise, return 0. */
2016 check_field (struct type
*type
, const char *name
,
2017 struct field_of_this_result
*is_a_field_of_this
)
2021 /* The type may be a stub. */
2022 CHECK_TYPEDEF (type
);
2024 for (i
= TYPE_NFIELDS (type
) - 1; i
>= TYPE_N_BASECLASSES (type
); i
--)
2026 const char *t_field_name
= TYPE_FIELD_NAME (type
, i
);
2028 if (t_field_name
&& (strcmp_iw (t_field_name
, name
) == 0))
2030 is_a_field_of_this
->type
= type
;
2031 is_a_field_of_this
->field
= &TYPE_FIELD (type
, i
);
2036 /* C++: If it was not found as a data field, then try to return it
2037 as a pointer to a method. */
2039 for (i
= TYPE_NFN_FIELDS (type
) - 1; i
>= 0; --i
)
2041 if (strcmp_iw (TYPE_FN_FIELDLIST_NAME (type
, i
), name
) == 0)
2043 is_a_field_of_this
->type
= type
;
2044 is_a_field_of_this
->fn_field
= &TYPE_FN_FIELDLIST (type
, i
);
2049 for (i
= TYPE_N_BASECLASSES (type
) - 1; i
>= 0; i
--)
2050 if (check_field (TYPE_BASECLASS (type
, i
), name
, is_a_field_of_this
))
2056 /* Behave like lookup_symbol except that NAME is the natural name
2057 (e.g., demangled name) of the symbol that we're looking for. */
2059 static struct symbol
*
2060 lookup_symbol_aux (const char *name
, const struct block
*block
,
2061 const domain_enum domain
, enum language language
,
2062 struct field_of_this_result
*is_a_field_of_this
)
2065 const struct language_defn
*langdef
;
2067 if (symbol_lookup_debug
)
2069 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2071 fprintf_unfiltered (gdb_stdlog
,
2072 "lookup_symbol_aux (%s, %s (objfile %s), %s, %s)\n",
2073 name
, host_address_to_string (block
),
2075 ? objfile_debug_name (objfile
) : "NULL",
2076 domain_name (domain
), language_str (language
));
2079 /* Initialize block_found so that the language la_lookup_symbol_nonlocal
2080 routines don't have to set it (to NULL) if a primitive type is found.
2081 We do this early so that block_found is also NULL if no symbol is
2082 found (though this is not part of the API, and callers cannot assume
2086 /* Make sure we do something sensible with is_a_field_of_this, since
2087 the callers that set this parameter to some non-null value will
2088 certainly use it later. If we don't set it, the contents of
2089 is_a_field_of_this are undefined. */
2090 if (is_a_field_of_this
!= NULL
)
2091 memset (is_a_field_of_this
, 0, sizeof (*is_a_field_of_this
));
2093 /* Search specified block and its superiors. Don't search
2094 STATIC_BLOCK or GLOBAL_BLOCK. */
2096 sym
= lookup_local_symbol (name
, block
, domain
, language
);
2099 if (symbol_lookup_debug
)
2101 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2102 host_address_to_string (sym
));
2107 /* If requested to do so by the caller and if appropriate for LANGUAGE,
2108 check to see if NAME is a field of `this'. */
2110 langdef
= language_def (language
);
2112 /* Don't do this check if we are searching for a struct. It will
2113 not be found by check_field, but will be found by other
2115 if (is_a_field_of_this
!= NULL
&& domain
!= STRUCT_DOMAIN
)
2117 struct symbol
*sym
= lookup_language_this (langdef
, block
);
2121 struct type
*t
= sym
->type
;
2123 /* I'm not really sure that type of this can ever
2124 be typedefed; just be safe. */
2126 if (TYPE_CODE (t
) == TYPE_CODE_PTR
2127 || TYPE_CODE (t
) == TYPE_CODE_REF
)
2128 t
= TYPE_TARGET_TYPE (t
);
2130 if (TYPE_CODE (t
) != TYPE_CODE_STRUCT
2131 && TYPE_CODE (t
) != TYPE_CODE_UNION
)
2132 error (_("Internal error: `%s' is not an aggregate"),
2133 langdef
->la_name_of_this
);
2135 if (check_field (t
, name
, is_a_field_of_this
))
2137 if (symbol_lookup_debug
)
2139 fprintf_unfiltered (gdb_stdlog
,
2140 "lookup_symbol_aux (...) = NULL\n");
2147 /* Now do whatever is appropriate for LANGUAGE to look
2148 up static and global variables. */
2150 sym
= langdef
->la_lookup_symbol_nonlocal (langdef
, name
, block
, domain
);
2153 if (symbol_lookup_debug
)
2155 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2156 host_address_to_string (sym
));
2161 /* Now search all static file-level symbols. Not strictly correct,
2162 but more useful than an error. */
2164 sym
= lookup_static_symbol (name
, domain
);
2165 if (symbol_lookup_debug
)
2167 fprintf_unfiltered (gdb_stdlog
, "lookup_symbol_aux (...) = %s\n",
2168 sym
!= NULL
? host_address_to_string (sym
) : "NULL");
2173 /* Check to see if the symbol is defined in BLOCK or its superiors.
2174 Don't search STATIC_BLOCK or GLOBAL_BLOCK. */
2176 static struct symbol
*
2177 lookup_local_symbol (const char *name
, const struct block
*block
,
2178 const domain_enum domain
,
2179 enum language language
)
2182 const struct block
*static_block
= block_static_block (block
);
2183 const char *scope
= block_scope (block
);
2185 /* Check if either no block is specified or it's a global block. */
2187 if (static_block
== NULL
)
2190 while (block
!= static_block
)
2192 sym
= lookup_symbol_in_block (name
, block
, domain
);
2196 if (language
== language_cplus
|| language
== language_fortran
)
2198 sym
= cp_lookup_symbol_imports_or_template (scope
, name
, block
,
2204 if (BLOCK_FUNCTION (block
) != NULL
&& block_inlined_p (block
))
2206 block
= BLOCK_SUPERBLOCK (block
);
2209 /* We've reached the end of the function without finding a result. */
2217 lookup_objfile_from_block (const struct block
*block
)
2219 struct objfile
*obj
;
2220 struct compunit_symtab
*cust
;
2225 block
= block_global_block (block
);
2226 /* Look through all blockvectors. */
2227 ALL_COMPUNITS (obj
, cust
)
2228 if (block
== BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
),
2231 if (obj
->separate_debug_objfile_backlink
)
2232 obj
= obj
->separate_debug_objfile_backlink
;
2243 lookup_symbol_in_block (const char *name
, const struct block
*block
,
2244 const domain_enum domain
)
2248 if (symbol_lookup_debug
> 1)
2250 struct objfile
*objfile
= lookup_objfile_from_block (block
);
2252 fprintf_unfiltered (gdb_stdlog
,
2253 "lookup_symbol_in_block (%s, %s (objfile %s), %s)",
2254 name
, host_address_to_string (block
),
2255 objfile_debug_name (objfile
),
2256 domain_name (domain
));
2259 sym
= block_lookup_symbol (block
, name
, domain
);
2262 if (symbol_lookup_debug
> 1)
2264 fprintf_unfiltered (gdb_stdlog
, " = %s\n",
2265 host_address_to_string (sym
));
2267 block_found
= block
;
2268 return fixup_symbol_section (sym
, NULL
);
2271 if (symbol_lookup_debug
> 1)
2272 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2279 lookup_global_symbol_from_objfile (struct objfile
*main_objfile
,
2281 const domain_enum domain
)
2283 struct objfile
*objfile
;
2285 for (objfile
= main_objfile
;
2287 objfile
= objfile_separate_debug_iterate (main_objfile
, objfile
))
2289 struct symbol
*sym
= lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
,
2299 /* Check to see if the symbol is defined in one of the OBJFILE's
2300 symtabs. BLOCK_INDEX should be either GLOBAL_BLOCK or STATIC_BLOCK,
2301 depending on whether or not we want to search global symbols or
2304 static struct symbol
*
2305 lookup_symbol_in_objfile_symtabs (struct objfile
*objfile
, int block_index
,
2306 const char *name
, const domain_enum domain
)
2308 struct compunit_symtab
*cust
;
2310 gdb_assert (block_index
== GLOBAL_BLOCK
|| block_index
== STATIC_BLOCK
);
2312 if (symbol_lookup_debug
> 1)
2314 fprintf_unfiltered (gdb_stdlog
,
2315 "lookup_symbol_in_objfile_symtabs (%s, %s, %s, %s)",
2316 objfile_debug_name (objfile
),
2317 block_index
== GLOBAL_BLOCK
2318 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2319 name
, domain_name (domain
));
2322 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2324 const struct blockvector
*bv
;
2325 const struct block
*block
;
2328 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2329 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2330 sym
= block_lookup_symbol_primary (block
, name
, domain
);
2333 if (symbol_lookup_debug
> 1)
2335 fprintf_unfiltered (gdb_stdlog
, " = %s (block %s)\n",
2336 host_address_to_string (sym
),
2337 host_address_to_string (block
));
2339 block_found
= block
;
2340 return fixup_symbol_section (sym
, objfile
);
2344 if (symbol_lookup_debug
> 1)
2345 fprintf_unfiltered (gdb_stdlog
, " = NULL\n");
2349 /* Wrapper around lookup_symbol_in_objfile_symtabs for search_symbols.
2350 Look up LINKAGE_NAME in DOMAIN in the global and static blocks of OBJFILE
2351 and all associated separate debug objfiles.
2353 Normally we only look in OBJFILE, and not any separate debug objfiles
2354 because the outer loop will cause them to be searched too. This case is
2355 different. Here we're called from search_symbols where it will only
2356 call us for the the objfile that contains a matching minsym. */
2358 static struct symbol
*
2359 lookup_symbol_in_objfile_from_linkage_name (struct objfile
*objfile
,
2360 const char *linkage_name
,
2363 enum language lang
= current_language
->la_language
;
2364 const char *modified_name
;
2365 struct cleanup
*cleanup
= demangle_for_lookup (linkage_name
, lang
,
2367 struct objfile
*main_objfile
, *cur_objfile
;
2369 if (objfile
->separate_debug_objfile_backlink
)
2370 main_objfile
= objfile
->separate_debug_objfile_backlink
;
2372 main_objfile
= objfile
;
2374 for (cur_objfile
= main_objfile
;
2376 cur_objfile
= objfile_separate_debug_iterate (main_objfile
, cur_objfile
))
2380 sym
= lookup_symbol_in_objfile_symtabs (cur_objfile
, GLOBAL_BLOCK
,
2381 modified_name
, domain
);
2383 sym
= lookup_symbol_in_objfile_symtabs (cur_objfile
, STATIC_BLOCK
,
2384 modified_name
, domain
);
2387 do_cleanups (cleanup
);
2392 do_cleanups (cleanup
);
2396 /* A helper function that throws an exception when a symbol was found
2397 in a psymtab but not in a symtab. */
2399 static void ATTRIBUTE_NORETURN
2400 error_in_psymtab_expansion (int block_index
, const char *name
,
2401 struct compunit_symtab
*cust
)
2404 Internal: %s symbol `%s' found in %s psymtab but not in symtab.\n\
2405 %s may be an inlined function, or may be a template function\n \
2406 (if a template, try specifying an instantiation: %s<type>)."),
2407 block_index
== GLOBAL_BLOCK
? "global" : "static",
2409 symtab_to_filename_for_display (compunit_primary_filetab (cust
)),
2413 /* A helper function for various lookup routines that interfaces with
2414 the "quick" symbol table functions. */
2416 static struct symbol
*
2417 lookup_symbol_via_quick_fns (struct objfile
*objfile
, int block_index
,
2418 const char *name
, const domain_enum domain
)
2420 struct compunit_symtab
*cust
;
2421 const struct blockvector
*bv
;
2422 const struct block
*block
;
2428 if (symbol_lookup_debug
> 1)
2430 fprintf_unfiltered (gdb_stdlog
,
2431 "lookup_symbol_via_quick_fns (%s, %s, %s, %s)\n",
2432 objfile_debug_name (objfile
),
2433 block_index
== GLOBAL_BLOCK
2434 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2435 name
, domain_name (domain
));
2438 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
, domain
);
2441 if (symbol_lookup_debug
> 1)
2443 fprintf_unfiltered (gdb_stdlog
,
2444 "lookup_symbol_via_quick_fns (...) = NULL\n");
2449 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2450 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2451 sym
= block_lookup_symbol (block
, name
, domain
);
2453 error_in_psymtab_expansion (block_index
, name
, cust
);
2455 if (symbol_lookup_debug
> 1)
2457 fprintf_unfiltered (gdb_stdlog
,
2458 "lookup_symbol_via_quick_fns (...) = %s (block %s)\n",
2459 host_address_to_string (sym
),
2460 host_address_to_string (block
));
2463 block_found
= block
;
2464 return fixup_symbol_section (sym
, objfile
);
2470 basic_lookup_symbol_nonlocal (const struct language_defn
*langdef
,
2472 const struct block
*block
,
2473 const domain_enum domain
)
2477 /* NOTE: carlton/2003-05-19: The comments below were written when
2478 this (or what turned into this) was part of lookup_symbol_aux;
2479 I'm much less worried about these questions now, since these
2480 decisions have turned out well, but I leave these comments here
2483 /* NOTE: carlton/2002-12-05: There is a question as to whether or
2484 not it would be appropriate to search the current global block
2485 here as well. (That's what this code used to do before the
2486 is_a_field_of_this check was moved up.) On the one hand, it's
2487 redundant with the lookup in all objfiles search that happens
2488 next. On the other hand, if decode_line_1 is passed an argument
2489 like filename:var, then the user presumably wants 'var' to be
2490 searched for in filename. On the third hand, there shouldn't be
2491 multiple global variables all of which are named 'var', and it's
2492 not like decode_line_1 has ever restricted its search to only
2493 global variables in a single filename. All in all, only
2494 searching the static block here seems best: it's correct and it's
2497 /* NOTE: carlton/2002-12-05: There's also a possible performance
2498 issue here: if you usually search for global symbols in the
2499 current file, then it would be slightly better to search the
2500 current global block before searching all the symtabs. But there
2501 are other factors that have a much greater effect on performance
2502 than that one, so I don't think we should worry about that for
2505 /* NOTE: dje/2014-10-26: The lookup in all objfiles search could skip
2506 the current objfile. Searching the current objfile first is useful
2507 for both matching user expectations as well as performance. */
2509 sym
= lookup_symbol_in_static_block (name
, block
, domain
);
2513 /* If we didn't find a definition for a builtin type in the static block,
2514 search for it now. This is actually the right thing to do and can be
2515 a massive performance win. E.g., when debugging a program with lots of
2516 shared libraries we could search all of them only to find out the
2517 builtin type isn't defined in any of them. This is common for types
2519 if (domain
== VAR_DOMAIN
)
2521 struct gdbarch
*gdbarch
;
2524 gdbarch
= target_gdbarch ();
2526 gdbarch
= block_gdbarch (block
);
2527 sym
= language_lookup_primitive_type_as_symbol (langdef
, gdbarch
, name
);
2532 return lookup_global_symbol (name
, block
, domain
);
2538 lookup_symbol_in_static_block (const char *name
,
2539 const struct block
*block
,
2540 const domain_enum domain
)
2542 const struct block
*static_block
= block_static_block (block
);
2545 if (static_block
== NULL
)
2548 if (symbol_lookup_debug
)
2550 struct objfile
*objfile
= lookup_objfile_from_block (static_block
);
2552 fprintf_unfiltered (gdb_stdlog
,
2553 "lookup_symbol_in_static_block (%s, %s (objfile %s),"
2556 host_address_to_string (block
),
2557 objfile_debug_name (objfile
),
2558 domain_name (domain
));
2561 sym
= lookup_symbol_in_block (name
, static_block
, domain
);
2562 if (symbol_lookup_debug
)
2564 fprintf_unfiltered (gdb_stdlog
,
2565 "lookup_symbol_in_static_block (...) = %s\n",
2566 sym
!= NULL
? host_address_to_string (sym
) : "NULL");
2571 /* Perform the standard symbol lookup of NAME in OBJFILE:
2572 1) First search expanded symtabs, and if not found
2573 2) Search the "quick" symtabs (partial or .gdb_index).
2574 BLOCK_INDEX is one of GLOBAL_BLOCK or STATIC_BLOCK. */
2576 static struct symbol
*
2577 lookup_symbol_in_objfile (struct objfile
*objfile
, int block_index
,
2578 const char *name
, const domain_enum domain
)
2580 struct symbol
*result
;
2582 if (symbol_lookup_debug
)
2584 fprintf_unfiltered (gdb_stdlog
,
2585 "lookup_symbol_in_objfile (%s, %s, %s, %s)\n",
2586 objfile_debug_name (objfile
),
2587 block_index
== GLOBAL_BLOCK
2588 ? "GLOBAL_BLOCK" : "STATIC_BLOCK",
2589 name
, domain_name (domain
));
2592 result
= lookup_symbol_in_objfile_symtabs (objfile
, block_index
,
2596 if (symbol_lookup_debug
)
2598 fprintf_unfiltered (gdb_stdlog
,
2599 "lookup_symbol_in_objfile (...) = %s"
2601 host_address_to_string (result
));
2606 result
= lookup_symbol_via_quick_fns (objfile
, block_index
,
2608 if (symbol_lookup_debug
)
2610 fprintf_unfiltered (gdb_stdlog
,
2611 "lookup_symbol_in_objfile (...) = %s%s\n",
2613 ? host_address_to_string (result
)
2615 result
!= NULL
? " (via quick fns)" : "");
2623 lookup_static_symbol (const char *name
, const domain_enum domain
)
2625 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2626 struct objfile
*objfile
;
2627 struct symbol
*result
;
2628 struct block_symbol_cache
*bsc
;
2629 struct symbol_cache_slot
*slot
;
2631 /* Lookup in STATIC_BLOCK is not current-objfile-dependent, so just pass
2632 NULL for OBJFILE_CONTEXT. */
2633 result
= symbol_cache_lookup (cache
, NULL
, STATIC_BLOCK
, name
, domain
,
2637 if (result
== SYMBOL_LOOKUP_FAILED
)
2642 ALL_OBJFILES (objfile
)
2644 result
= lookup_symbol_in_objfile (objfile
, STATIC_BLOCK
, name
, domain
);
2647 /* Still pass NULL for OBJFILE_CONTEXT here. */
2648 symbol_cache_mark_found (bsc
, slot
, NULL
, result
);
2653 /* Still pass NULL for OBJFILE_CONTEXT here. */
2654 symbol_cache_mark_not_found (bsc
, slot
, NULL
, name
, domain
);
2658 /* Private data to be used with lookup_symbol_global_iterator_cb. */
2660 struct global_sym_lookup_data
2662 /* The name of the symbol we are searching for. */
2665 /* The domain to use for our search. */
2668 /* The field where the callback should store the symbol if found.
2669 It should be initialized to NULL before the search is started. */
2670 struct symbol
*result
;
2673 /* A callback function for gdbarch_iterate_over_objfiles_in_search_order.
2674 It searches by name for a symbol in the GLOBAL_BLOCK of the given
2675 OBJFILE. The arguments for the search are passed via CB_DATA,
2676 which in reality is a pointer to struct global_sym_lookup_data. */
2679 lookup_symbol_global_iterator_cb (struct objfile
*objfile
,
2682 struct global_sym_lookup_data
*data
=
2683 (struct global_sym_lookup_data
*) cb_data
;
2685 gdb_assert (data
->result
== NULL
);
2687 data
->result
= lookup_symbol_in_objfile (objfile
, GLOBAL_BLOCK
,
2688 data
->name
, data
->domain
);
2690 /* If we found a match, tell the iterator to stop. Otherwise,
2692 return (data
->result
!= NULL
);
2698 lookup_global_symbol (const char *name
,
2699 const struct block
*block
,
2700 const domain_enum domain
)
2702 struct symbol_cache
*cache
= get_symbol_cache (current_program_space
);
2704 struct objfile
*objfile
;
2705 struct global_sym_lookup_data lookup_data
;
2706 struct block_symbol_cache
*bsc
;
2707 struct symbol_cache_slot
*slot
;
2709 objfile
= lookup_objfile_from_block (block
);
2711 /* First see if we can find the symbol in the cache.
2712 This works because we use the current objfile to qualify the lookup. */
2713 sym
= symbol_cache_lookup (cache
, objfile
, GLOBAL_BLOCK
, name
, domain
,
2717 if (sym
== SYMBOL_LOOKUP_FAILED
)
2722 /* Call library-specific lookup procedure. */
2723 if (objfile
!= NULL
)
2724 sym
= solib_global_lookup (objfile
, name
, domain
);
2726 /* If that didn't work go a global search (of global blocks, heh). */
2729 memset (&lookup_data
, 0, sizeof (lookup_data
));
2730 lookup_data
.name
= name
;
2731 lookup_data
.domain
= domain
;
2732 gdbarch_iterate_over_objfiles_in_search_order
2733 (objfile
!= NULL
? get_objfile_arch (objfile
) : target_gdbarch (),
2734 lookup_symbol_global_iterator_cb
, &lookup_data
, objfile
);
2735 sym
= lookup_data
.result
;
2739 symbol_cache_mark_found (bsc
, slot
, objfile
, sym
);
2741 symbol_cache_mark_not_found (bsc
, slot
, objfile
, name
, domain
);
2747 symbol_matches_domain (enum language symbol_language
,
2748 domain_enum symbol_domain
,
2751 /* For C++ "struct foo { ... }" also defines a typedef for "foo".
2752 A Java class declaration also defines a typedef for the class.
2753 Similarly, any Ada type declaration implicitly defines a typedef. */
2754 if (symbol_language
== language_cplus
2755 || symbol_language
== language_d
2756 || symbol_language
== language_java
2757 || symbol_language
== language_ada
)
2759 if ((domain
== VAR_DOMAIN
|| domain
== STRUCT_DOMAIN
)
2760 && symbol_domain
== STRUCT_DOMAIN
)
2763 /* For all other languages, strict match is required. */
2764 return (symbol_domain
== domain
);
2770 lookup_transparent_type (const char *name
)
2772 return current_language
->la_lookup_transparent_type (name
);
2775 /* A helper for basic_lookup_transparent_type that interfaces with the
2776 "quick" symbol table functions. */
2778 static struct type
*
2779 basic_lookup_transparent_type_quick (struct objfile
*objfile
, int block_index
,
2782 struct compunit_symtab
*cust
;
2783 const struct blockvector
*bv
;
2784 struct block
*block
;
2789 cust
= objfile
->sf
->qf
->lookup_symbol (objfile
, block_index
, name
,
2794 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2795 block
= BLOCKVECTOR_BLOCK (bv
, block_index
);
2796 sym
= block_lookup_symbol (block
, name
, STRUCT_DOMAIN
);
2798 error_in_psymtab_expansion (block_index
, name
, cust
);
2800 if (!TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
2801 return SYMBOL_TYPE (sym
);
2806 /* The standard implementation of lookup_transparent_type. This code
2807 was modeled on lookup_symbol -- the parts not relevant to looking
2808 up types were just left out. In particular it's assumed here that
2809 types are available in STRUCT_DOMAIN and only in file-static or
2813 basic_lookup_transparent_type (const char *name
)
2816 struct compunit_symtab
*cust
;
2817 const struct blockvector
*bv
;
2818 struct objfile
*objfile
;
2819 struct block
*block
;
2822 /* Now search all the global symbols. Do the symtab's first, then
2823 check the psymtab's. If a psymtab indicates the existence
2824 of the desired name as a global, then do psymtab-to-symtab
2825 conversion on the fly and return the found symbol. */
2827 ALL_OBJFILES (objfile
)
2829 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2831 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2832 block
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2833 sym
= block_lookup_symbol (block
, name
, STRUCT_DOMAIN
);
2834 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
2836 return SYMBOL_TYPE (sym
);
2841 ALL_OBJFILES (objfile
)
2843 t
= basic_lookup_transparent_type_quick (objfile
, GLOBAL_BLOCK
, name
);
2848 /* Now search the static file-level symbols.
2849 Not strictly correct, but more useful than an error.
2850 Do the symtab's first, then
2851 check the psymtab's. If a psymtab indicates the existence
2852 of the desired name as a file-level static, then do psymtab-to-symtab
2853 conversion on the fly and return the found symbol. */
2855 ALL_OBJFILES (objfile
)
2857 ALL_OBJFILE_COMPUNITS (objfile
, cust
)
2859 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2860 block
= BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
);
2861 sym
= block_lookup_symbol (block
, name
, STRUCT_DOMAIN
);
2862 if (sym
&& !TYPE_IS_OPAQUE (SYMBOL_TYPE (sym
)))
2864 return SYMBOL_TYPE (sym
);
2869 ALL_OBJFILES (objfile
)
2871 t
= basic_lookup_transparent_type_quick (objfile
, STATIC_BLOCK
, name
);
2876 return (struct type
*) 0;
2879 /* Iterate over the symbols named NAME, matching DOMAIN, in BLOCK.
2881 For each symbol that matches, CALLBACK is called. The symbol and
2882 DATA are passed to the callback.
2884 If CALLBACK returns zero, the iteration ends. Otherwise, the
2885 search continues. */
2888 iterate_over_symbols (const struct block
*block
, const char *name
,
2889 const domain_enum domain
,
2890 symbol_found_callback_ftype
*callback
,
2893 struct block_iterator iter
;
2896 ALL_BLOCK_SYMBOLS_WITH_NAME (block
, name
, iter
, sym
)
2898 if (symbol_matches_domain (SYMBOL_LANGUAGE (sym
),
2899 SYMBOL_DOMAIN (sym
), domain
))
2901 if (!callback (sym
, data
))
2907 /* Find the compunit symtab associated with PC and SECTION.
2908 This will read in debug info as necessary. */
2910 struct compunit_symtab
*
2911 find_pc_sect_compunit_symtab (CORE_ADDR pc
, struct obj_section
*section
)
2913 struct compunit_symtab
*cust
;
2914 struct compunit_symtab
*best_cust
= NULL
;
2915 struct objfile
*objfile
;
2916 CORE_ADDR distance
= 0;
2917 struct bound_minimal_symbol msymbol
;
2919 /* If we know that this is not a text address, return failure. This is
2920 necessary because we loop based on the block's high and low code
2921 addresses, which do not include the data ranges, and because
2922 we call find_pc_sect_psymtab which has a similar restriction based
2923 on the partial_symtab's texthigh and textlow. */
2924 msymbol
= lookup_minimal_symbol_by_pc_section (pc
, section
);
2926 && (MSYMBOL_TYPE (msymbol
.minsym
) == mst_data
2927 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_bss
2928 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_abs
2929 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_data
2930 || MSYMBOL_TYPE (msymbol
.minsym
) == mst_file_bss
))
2933 /* Search all symtabs for the one whose file contains our address, and which
2934 is the smallest of all the ones containing the address. This is designed
2935 to deal with a case like symtab a is at 0x1000-0x2000 and 0x3000-0x4000
2936 and symtab b is at 0x2000-0x3000. So the GLOBAL_BLOCK for a is from
2937 0x1000-0x4000, but for address 0x2345 we want to return symtab b.
2939 This happens for native ecoff format, where code from included files
2940 gets its own symtab. The symtab for the included file should have
2941 been read in already via the dependency mechanism.
2942 It might be swifter to create several symtabs with the same name
2943 like xcoff does (I'm not sure).
2945 It also happens for objfiles that have their functions reordered.
2946 For these, the symtab we are looking for is not necessarily read in. */
2948 ALL_COMPUNITS (objfile
, cust
)
2951 const struct blockvector
*bv
;
2953 bv
= COMPUNIT_BLOCKVECTOR (cust
);
2954 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
2956 if (BLOCK_START (b
) <= pc
2957 && BLOCK_END (b
) > pc
2959 || BLOCK_END (b
) - BLOCK_START (b
) < distance
))
2961 /* For an objfile that has its functions reordered,
2962 find_pc_psymtab will find the proper partial symbol table
2963 and we simply return its corresponding symtab. */
2964 /* In order to better support objfiles that contain both
2965 stabs and coff debugging info, we continue on if a psymtab
2967 if ((objfile
->flags
& OBJF_REORDERED
) && objfile
->sf
)
2969 struct compunit_symtab
*result
;
2972 = objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
,
2981 struct block_iterator iter
;
2982 struct symbol
*sym
= NULL
;
2984 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
2986 fixup_symbol_section (sym
, objfile
);
2987 if (matching_obj_sections (SYMBOL_OBJ_SECTION (objfile
, sym
),
2992 continue; /* No symbol in this symtab matches
2995 distance
= BLOCK_END (b
) - BLOCK_START (b
);
3000 if (best_cust
!= NULL
)
3003 /* Not found in symtabs, search the "quick" symtabs (e.g. psymtabs). */
3005 ALL_OBJFILES (objfile
)
3007 struct compunit_symtab
*result
;
3011 result
= objfile
->sf
->qf
->find_pc_sect_compunit_symtab (objfile
,
3022 /* Find the compunit symtab associated with PC.
3023 This will read in debug info as necessary.
3024 Backward compatibility, no section. */
3026 struct compunit_symtab
*
3027 find_pc_compunit_symtab (CORE_ADDR pc
)
3029 return find_pc_sect_compunit_symtab (pc
, find_pc_mapped_section (pc
));
3033 /* Find the source file and line number for a given PC value and SECTION.
3034 Return a structure containing a symtab pointer, a line number,
3035 and a pc range for the entire source line.
3036 The value's .pc field is NOT the specified pc.
3037 NOTCURRENT nonzero means, if specified pc is on a line boundary,
3038 use the line that ends there. Otherwise, in that case, the line
3039 that begins there is used. */
3041 /* The big complication here is that a line may start in one file, and end just
3042 before the start of another file. This usually occurs when you #include
3043 code in the middle of a subroutine. To properly find the end of a line's PC
3044 range, we must search all symtabs associated with this compilation unit, and
3045 find the one whose first PC is closer than that of the next line in this
3048 /* If it's worth the effort, we could be using a binary search. */
3050 struct symtab_and_line
3051 find_pc_sect_line (CORE_ADDR pc
, struct obj_section
*section
, int notcurrent
)
3053 struct compunit_symtab
*cust
;
3054 struct symtab
*iter_s
;
3055 struct linetable
*l
;
3058 struct linetable_entry
*item
;
3059 struct symtab_and_line val
;
3060 const struct blockvector
*bv
;
3061 struct bound_minimal_symbol msymbol
;
3063 /* Info on best line seen so far, and where it starts, and its file. */
3065 struct linetable_entry
*best
= NULL
;
3066 CORE_ADDR best_end
= 0;
3067 struct symtab
*best_symtab
= 0;
3069 /* Store here the first line number
3070 of a file which contains the line at the smallest pc after PC.
3071 If we don't find a line whose range contains PC,
3072 we will use a line one less than this,
3073 with a range from the start of that file to the first line's pc. */
3074 struct linetable_entry
*alt
= NULL
;
3076 /* Info on best line seen in this file. */
3078 struct linetable_entry
*prev
;
3080 /* If this pc is not from the current frame,
3081 it is the address of the end of a call instruction.
3082 Quite likely that is the start of the following statement.
3083 But what we want is the statement containing the instruction.
3084 Fudge the pc to make sure we get that. */
3086 init_sal (&val
); /* initialize to zeroes */
3088 val
.pspace
= current_program_space
;
3090 /* It's tempting to assume that, if we can't find debugging info for
3091 any function enclosing PC, that we shouldn't search for line
3092 number info, either. However, GAS can emit line number info for
3093 assembly files --- very helpful when debugging hand-written
3094 assembly code. In such a case, we'd have no debug info for the
3095 function, but we would have line info. */
3100 /* elz: added this because this function returned the wrong
3101 information if the pc belongs to a stub (import/export)
3102 to call a shlib function. This stub would be anywhere between
3103 two functions in the target, and the line info was erroneously
3104 taken to be the one of the line before the pc. */
3106 /* RT: Further explanation:
3108 * We have stubs (trampolines) inserted between procedures.
3110 * Example: "shr1" exists in a shared library, and a "shr1" stub also
3111 * exists in the main image.
3113 * In the minimal symbol table, we have a bunch of symbols
3114 * sorted by start address. The stubs are marked as "trampoline",
3115 * the others appear as text. E.g.:
3117 * Minimal symbol table for main image
3118 * main: code for main (text symbol)
3119 * shr1: stub (trampoline symbol)
3120 * foo: code for foo (text symbol)
3122 * Minimal symbol table for "shr1" image:
3124 * shr1: code for shr1 (text symbol)
3127 * So the code below is trying to detect if we are in the stub
3128 * ("shr1" stub), and if so, find the real code ("shr1" trampoline),
3129 * and if found, do the symbolization from the real-code address
3130 * rather than the stub address.
3132 * Assumptions being made about the minimal symbol table:
3133 * 1. lookup_minimal_symbol_by_pc() will return a trampoline only
3134 * if we're really in the trampoline.s If we're beyond it (say
3135 * we're in "foo" in the above example), it'll have a closer
3136 * symbol (the "foo" text symbol for example) and will not
3137 * return the trampoline.
3138 * 2. lookup_minimal_symbol_text() will find a real text symbol
3139 * corresponding to the trampoline, and whose address will
3140 * be different than the trampoline address. I put in a sanity
3141 * check for the address being the same, to avoid an
3142 * infinite recursion.
3144 msymbol
= lookup_minimal_symbol_by_pc (pc
);
3145 if (msymbol
.minsym
!= NULL
)
3146 if (MSYMBOL_TYPE (msymbol
.minsym
) == mst_solib_trampoline
)
3148 struct bound_minimal_symbol mfunsym
3149 = lookup_minimal_symbol_text (MSYMBOL_LINKAGE_NAME (msymbol
.minsym
),
3152 if (mfunsym
.minsym
== NULL
)
3153 /* I eliminated this warning since it is coming out
3154 * in the following situation:
3155 * gdb shmain // test program with shared libraries
3156 * (gdb) break shr1 // function in shared lib
3157 * Warning: In stub for ...
3158 * In the above situation, the shared lib is not loaded yet,
3159 * so of course we can't find the real func/line info,
3160 * but the "break" still works, and the warning is annoying.
3161 * So I commented out the warning. RT */
3162 /* warning ("In stub for %s; unable to find real function/line info",
3163 SYMBOL_LINKAGE_NAME (msymbol)); */
3166 else if (BMSYMBOL_VALUE_ADDRESS (mfunsym
)
3167 == BMSYMBOL_VALUE_ADDRESS (msymbol
))
3168 /* Avoid infinite recursion */
3169 /* See above comment about why warning is commented out. */
3170 /* warning ("In stub for %s; unable to find real function/line info",
3171 SYMBOL_LINKAGE_NAME (msymbol)); */
3175 return find_pc_line (BMSYMBOL_VALUE_ADDRESS (mfunsym
), 0);
3179 cust
= find_pc_sect_compunit_symtab (pc
, section
);
3182 /* If no symbol information, return previous pc. */
3189 bv
= COMPUNIT_BLOCKVECTOR (cust
);
3191 /* Look at all the symtabs that share this blockvector.
3192 They all have the same apriori range, that we found was right;
3193 but they have different line tables. */
3195 ALL_COMPUNIT_FILETABS (cust
, iter_s
)
3197 /* Find the best line in this symtab. */
3198 l
= SYMTAB_LINETABLE (iter_s
);
3204 /* I think len can be zero if the symtab lacks line numbers
3205 (e.g. gcc -g1). (Either that or the LINETABLE is NULL;
3206 I'm not sure which, and maybe it depends on the symbol
3212 item
= l
->item
; /* Get first line info. */
3214 /* Is this file's first line closer than the first lines of other files?
3215 If so, record this file, and its first line, as best alternate. */
3216 if (item
->pc
> pc
&& (!alt
|| item
->pc
< alt
->pc
))
3219 for (i
= 0; i
< len
; i
++, item
++)
3221 /* Leave prev pointing to the linetable entry for the last line
3222 that started at or before PC. */
3229 /* At this point, prev points at the line whose start addr is <= pc, and
3230 item points at the next line. If we ran off the end of the linetable
3231 (pc >= start of the last line), then prev == item. If pc < start of
3232 the first line, prev will not be set. */
3234 /* Is this file's best line closer than the best in the other files?
3235 If so, record this file, and its best line, as best so far. Don't
3236 save prev if it represents the end of a function (i.e. line number
3237 0) instead of a real line. */
3239 if (prev
&& prev
->line
&& (!best
|| prev
->pc
> best
->pc
))
3242 best_symtab
= iter_s
;
3244 /* Discard BEST_END if it's before the PC of the current BEST. */
3245 if (best_end
<= best
->pc
)
3249 /* If another line (denoted by ITEM) is in the linetable and its
3250 PC is after BEST's PC, but before the current BEST_END, then
3251 use ITEM's PC as the new best_end. */
3252 if (best
&& i
< len
&& item
->pc
> best
->pc
3253 && (best_end
== 0 || best_end
> item
->pc
))
3254 best_end
= item
->pc
;
3259 /* If we didn't find any line number info, just return zeros.
3260 We used to return alt->line - 1 here, but that could be
3261 anywhere; if we don't have line number info for this PC,
3262 don't make some up. */
3265 else if (best
->line
== 0)
3267 /* If our best fit is in a range of PC's for which no line
3268 number info is available (line number is zero) then we didn't
3269 find any valid line information. */
3274 val
.symtab
= best_symtab
;
3275 val
.line
= best
->line
;
3277 if (best_end
&& (!alt
|| best_end
< alt
->pc
))
3282 val
.end
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
3284 val
.section
= section
;
3288 /* Backward compatibility (no section). */
3290 struct symtab_and_line
3291 find_pc_line (CORE_ADDR pc
, int notcurrent
)
3293 struct obj_section
*section
;
3295 section
= find_pc_overlay (pc
);
3296 if (pc_in_unmapped_range (pc
, section
))
3297 pc
= overlay_mapped_address (pc
, section
);
3298 return find_pc_sect_line (pc
, section
, notcurrent
);
3304 find_pc_line_symtab (CORE_ADDR pc
)
3306 struct symtab_and_line sal
;
3308 /* This always passes zero for NOTCURRENT to find_pc_line.
3309 There are currently no callers that ever pass non-zero. */
3310 sal
= find_pc_line (pc
, 0);
3314 /* Find line number LINE in any symtab whose name is the same as
3317 If found, return the symtab that contains the linetable in which it was
3318 found, set *INDEX to the index in the linetable of the best entry
3319 found, and set *EXACT_MATCH nonzero if the value returned is an
3322 If not found, return NULL. */
3325 find_line_symtab (struct symtab
*symtab
, int line
,
3326 int *index
, int *exact_match
)
3328 int exact
= 0; /* Initialized here to avoid a compiler warning. */
3330 /* BEST_INDEX and BEST_LINETABLE identify the smallest linenumber > LINE
3334 struct linetable
*best_linetable
;
3335 struct symtab
*best_symtab
;
3337 /* First try looking it up in the given symtab. */
3338 best_linetable
= SYMTAB_LINETABLE (symtab
);
3339 best_symtab
= symtab
;
3340 best_index
= find_line_common (best_linetable
, line
, &exact
, 0);
3341 if (best_index
< 0 || !exact
)
3343 /* Didn't find an exact match. So we better keep looking for
3344 another symtab with the same name. In the case of xcoff,
3345 multiple csects for one source file (produced by IBM's FORTRAN
3346 compiler) produce multiple symtabs (this is unavoidable
3347 assuming csects can be at arbitrary places in memory and that
3348 the GLOBAL_BLOCK of a symtab has a begin and end address). */
3350 /* BEST is the smallest linenumber > LINE so far seen,
3351 or 0 if none has been seen so far.
3352 BEST_INDEX and BEST_LINETABLE identify the item for it. */
3355 struct objfile
*objfile
;
3356 struct compunit_symtab
*cu
;
3359 if (best_index
>= 0)
3360 best
= best_linetable
->item
[best_index
].line
;
3364 ALL_OBJFILES (objfile
)
3367 objfile
->sf
->qf
->expand_symtabs_with_fullname (objfile
,
3368 symtab_to_fullname (symtab
));
3371 ALL_FILETABS (objfile
, cu
, s
)
3373 struct linetable
*l
;
3376 if (FILENAME_CMP (symtab
->filename
, s
->filename
) != 0)
3378 if (FILENAME_CMP (symtab_to_fullname (symtab
),
3379 symtab_to_fullname (s
)) != 0)
3381 l
= SYMTAB_LINETABLE (s
);
3382 ind
= find_line_common (l
, line
, &exact
, 0);
3392 if (best
== 0 || l
->item
[ind
].line
< best
)
3394 best
= l
->item
[ind
].line
;
3407 *index
= best_index
;
3409 *exact_match
= exact
;
3414 /* Given SYMTAB, returns all the PCs function in the symtab that
3415 exactly match LINE. Returns NULL if there are no exact matches,
3416 but updates BEST_ITEM in this case. */
3419 find_pcs_for_symtab_line (struct symtab
*symtab
, int line
,
3420 struct linetable_entry
**best_item
)
3423 VEC (CORE_ADDR
) *result
= NULL
;
3425 /* First, collect all the PCs that are at this line. */
3431 idx
= find_line_common (SYMTAB_LINETABLE (symtab
), line
, &was_exact
,
3438 struct linetable_entry
*item
= &SYMTAB_LINETABLE (symtab
)->item
[idx
];
3440 if (*best_item
== NULL
|| item
->line
< (*best_item
)->line
)
3446 VEC_safe_push (CORE_ADDR
, result
,
3447 SYMTAB_LINETABLE (symtab
)->item
[idx
].pc
);
3455 /* Set the PC value for a given source file and line number and return true.
3456 Returns zero for invalid line number (and sets the PC to 0).
3457 The source file is specified with a struct symtab. */
3460 find_line_pc (struct symtab
*symtab
, int line
, CORE_ADDR
*pc
)
3462 struct linetable
*l
;
3469 symtab
= find_line_symtab (symtab
, line
, &ind
, NULL
);
3472 l
= SYMTAB_LINETABLE (symtab
);
3473 *pc
= l
->item
[ind
].pc
;
3480 /* Find the range of pc values in a line.
3481 Store the starting pc of the line into *STARTPTR
3482 and the ending pc (start of next line) into *ENDPTR.
3483 Returns 1 to indicate success.
3484 Returns 0 if could not find the specified line. */
3487 find_line_pc_range (struct symtab_and_line sal
, CORE_ADDR
*startptr
,
3490 CORE_ADDR startaddr
;
3491 struct symtab_and_line found_sal
;
3494 if (startaddr
== 0 && !find_line_pc (sal
.symtab
, sal
.line
, &startaddr
))
3497 /* This whole function is based on address. For example, if line 10 has
3498 two parts, one from 0x100 to 0x200 and one from 0x300 to 0x400, then
3499 "info line *0x123" should say the line goes from 0x100 to 0x200
3500 and "info line *0x355" should say the line goes from 0x300 to 0x400.
3501 This also insures that we never give a range like "starts at 0x134
3502 and ends at 0x12c". */
3504 found_sal
= find_pc_sect_line (startaddr
, sal
.section
, 0);
3505 if (found_sal
.line
!= sal
.line
)
3507 /* The specified line (sal) has zero bytes. */
3508 *startptr
= found_sal
.pc
;
3509 *endptr
= found_sal
.pc
;
3513 *startptr
= found_sal
.pc
;
3514 *endptr
= found_sal
.end
;
3519 /* Given a line table and a line number, return the index into the line
3520 table for the pc of the nearest line whose number is >= the specified one.
3521 Return -1 if none is found. The value is >= 0 if it is an index.
3522 START is the index at which to start searching the line table.
3524 Set *EXACT_MATCH nonzero if the value returned is an exact match. */
3527 find_line_common (struct linetable
*l
, int lineno
,
3528 int *exact_match
, int start
)
3533 /* BEST is the smallest linenumber > LINENO so far seen,
3534 or 0 if none has been seen so far.
3535 BEST_INDEX identifies the item for it. */
3537 int best_index
= -1;
3548 for (i
= start
; i
< len
; i
++)
3550 struct linetable_entry
*item
= &(l
->item
[i
]);
3552 if (item
->line
== lineno
)
3554 /* Return the first (lowest address) entry which matches. */
3559 if (item
->line
> lineno
&& (best
== 0 || item
->line
< best
))
3566 /* If we got here, we didn't get an exact match. */
3571 find_pc_line_pc_range (CORE_ADDR pc
, CORE_ADDR
*startptr
, CORE_ADDR
*endptr
)
3573 struct symtab_and_line sal
;
3575 sal
= find_pc_line (pc
, 0);
3578 return sal
.symtab
!= 0;
3581 /* Given a function symbol SYM, find the symtab and line for the start
3583 If the argument FUNFIRSTLINE is nonzero, we want the first line
3584 of real code inside the function. */
3586 struct symtab_and_line
3587 find_function_start_sal (struct symbol
*sym
, int funfirstline
)
3589 struct symtab_and_line sal
;
3590 struct obj_section
*section
;
3592 fixup_symbol_section (sym
, NULL
);
3593 section
= SYMBOL_OBJ_SECTION (symbol_objfile (sym
), sym
);
3594 sal
= find_pc_sect_line (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)), section
, 0);
3596 /* We always should have a line for the function start address.
3597 If we don't, something is odd. Create a plain SAL refering
3598 just the PC and hope that skip_prologue_sal (if requested)
3599 can find a line number for after the prologue. */
3600 if (sal
.pc
< BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)))
3603 sal
.pspace
= current_program_space
;
3604 sal
.pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3605 sal
.section
= section
;
3609 skip_prologue_sal (&sal
);
3614 /* Given a function start address FUNC_ADDR and SYMTAB, find the first
3615 address for that function that has an entry in SYMTAB's line info
3616 table. If such an entry cannot be found, return FUNC_ADDR
3620 skip_prologue_using_lineinfo (CORE_ADDR func_addr
, struct symtab
*symtab
)
3622 CORE_ADDR func_start
, func_end
;
3623 struct linetable
*l
;
3626 /* Give up if this symbol has no lineinfo table. */
3627 l
= SYMTAB_LINETABLE (symtab
);
3631 /* Get the range for the function's PC values, or give up if we
3632 cannot, for some reason. */
3633 if (!find_pc_partial_function (func_addr
, NULL
, &func_start
, &func_end
))
3636 /* Linetable entries are ordered by PC values, see the commentary in
3637 symtab.h where `struct linetable' is defined. Thus, the first
3638 entry whose PC is in the range [FUNC_START..FUNC_END[ is the
3639 address we are looking for. */
3640 for (i
= 0; i
< l
->nitems
; i
++)
3642 struct linetable_entry
*item
= &(l
->item
[i
]);
3644 /* Don't use line numbers of zero, they mark special entries in
3645 the table. See the commentary on symtab.h before the
3646 definition of struct linetable. */
3647 if (item
->line
> 0 && func_start
<= item
->pc
&& item
->pc
< func_end
)
3654 /* Adjust SAL to the first instruction past the function prologue.
3655 If the PC was explicitly specified, the SAL is not changed.
3656 If the line number was explicitly specified, at most the SAL's PC
3657 is updated. If SAL is already past the prologue, then do nothing. */
3660 skip_prologue_sal (struct symtab_and_line
*sal
)
3663 struct symtab_and_line start_sal
;
3664 struct cleanup
*old_chain
;
3665 CORE_ADDR pc
, saved_pc
;
3666 struct obj_section
*section
;
3668 struct objfile
*objfile
;
3669 struct gdbarch
*gdbarch
;
3670 const struct block
*b
, *function_block
;
3671 int force_skip
, skip
;
3673 /* Do not change the SAL if PC was specified explicitly. */
3674 if (sal
->explicit_pc
)
3677 old_chain
= save_current_space_and_thread ();
3678 switch_to_program_space_and_thread (sal
->pspace
);
3680 sym
= find_pc_sect_function (sal
->pc
, sal
->section
);
3683 fixup_symbol_section (sym
, NULL
);
3685 objfile
= symbol_objfile (sym
);
3686 pc
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
));
3687 section
= SYMBOL_OBJ_SECTION (objfile
, sym
);
3688 name
= SYMBOL_LINKAGE_NAME (sym
);
3692 struct bound_minimal_symbol msymbol
3693 = lookup_minimal_symbol_by_pc_section (sal
->pc
, sal
->section
);
3695 if (msymbol
.minsym
== NULL
)
3697 do_cleanups (old_chain
);
3701 objfile
= msymbol
.objfile
;
3702 pc
= BMSYMBOL_VALUE_ADDRESS (msymbol
);
3703 section
= MSYMBOL_OBJ_SECTION (objfile
, msymbol
.minsym
);
3704 name
= MSYMBOL_LINKAGE_NAME (msymbol
.minsym
);
3707 gdbarch
= get_objfile_arch (objfile
);
3709 /* Process the prologue in two passes. In the first pass try to skip the
3710 prologue (SKIP is true) and verify there is a real need for it (indicated
3711 by FORCE_SKIP). If no such reason was found run a second pass where the
3712 prologue is not skipped (SKIP is false). */
3717 /* Be conservative - allow direct PC (without skipping prologue) only if we
3718 have proven the CU (Compilation Unit) supports it. sal->SYMTAB does not
3719 have to be set by the caller so we use SYM instead. */
3721 && COMPUNIT_LOCATIONS_VALID (SYMTAB_COMPUNIT (symbol_symtab (sym
))))
3729 /* If the function is in an unmapped overlay, use its unmapped LMA address,
3730 so that gdbarch_skip_prologue has something unique to work on. */
3731 if (section_is_overlay (section
) && !section_is_mapped (section
))
3732 pc
= overlay_unmapped_address (pc
, section
);
3734 /* Skip "first line" of function (which is actually its prologue). */
3735 pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3736 if (gdbarch_skip_entrypoint_p (gdbarch
))
3737 pc
= gdbarch_skip_entrypoint (gdbarch
, pc
);
3739 pc
= gdbarch_skip_prologue (gdbarch
, pc
);
3741 /* For overlays, map pc back into its mapped VMA range. */
3742 pc
= overlay_mapped_address (pc
, section
);
3744 /* Calculate line number. */
3745 start_sal
= find_pc_sect_line (pc
, section
, 0);
3747 /* Check if gdbarch_skip_prologue left us in mid-line, and the next
3748 line is still part of the same function. */
3749 if (skip
&& start_sal
.pc
!= pc
3750 && (sym
? (BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)) <= start_sal
.end
3751 && start_sal
.end
< BLOCK_END (SYMBOL_BLOCK_VALUE (sym
)))
3752 : (lookup_minimal_symbol_by_pc_section (start_sal
.end
, section
).minsym
3753 == lookup_minimal_symbol_by_pc_section (pc
, section
).minsym
)))
3755 /* First pc of next line */
3757 /* Recalculate the line number (might not be N+1). */
3758 start_sal
= find_pc_sect_line (pc
, section
, 0);
3761 /* On targets with executable formats that don't have a concept of
3762 constructors (ELF with .init has, PE doesn't), gcc emits a call
3763 to `__main' in `main' between the prologue and before user
3765 if (gdbarch_skip_main_prologue_p (gdbarch
)
3766 && name
&& strcmp_iw (name
, "main") == 0)
3768 pc
= gdbarch_skip_main_prologue (gdbarch
, pc
);
3769 /* Recalculate the line number (might not be N+1). */
3770 start_sal
= find_pc_sect_line (pc
, section
, 0);
3774 while (!force_skip
&& skip
--);
3776 /* If we still don't have a valid source line, try to find the first
3777 PC in the lineinfo table that belongs to the same function. This
3778 happens with COFF debug info, which does not seem to have an
3779 entry in lineinfo table for the code after the prologue which has
3780 no direct relation to source. For example, this was found to be
3781 the case with the DJGPP target using "gcc -gcoff" when the
3782 compiler inserted code after the prologue to make sure the stack
3784 if (!force_skip
&& sym
&& start_sal
.symtab
== NULL
)
3786 pc
= skip_prologue_using_lineinfo (pc
, symbol_symtab (sym
));
3787 /* Recalculate the line number. */
3788 start_sal
= find_pc_sect_line (pc
, section
, 0);
3791 do_cleanups (old_chain
);
3793 /* If we're already past the prologue, leave SAL unchanged. Otherwise
3794 forward SAL to the end of the prologue. */
3799 sal
->section
= section
;
3801 /* Unless the explicit_line flag was set, update the SAL line
3802 and symtab to correspond to the modified PC location. */
3803 if (sal
->explicit_line
)
3806 sal
->symtab
= start_sal
.symtab
;
3807 sal
->line
= start_sal
.line
;
3808 sal
->end
= start_sal
.end
;
3810 /* Check if we are now inside an inlined function. If we can,
3811 use the call site of the function instead. */
3812 b
= block_for_pc_sect (sal
->pc
, sal
->section
);
3813 function_block
= NULL
;
3816 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
3818 else if (BLOCK_FUNCTION (b
) != NULL
)
3820 b
= BLOCK_SUPERBLOCK (b
);
3822 if (function_block
!= NULL
3823 && SYMBOL_LINE (BLOCK_FUNCTION (function_block
)) != 0)
3825 sal
->line
= SYMBOL_LINE (BLOCK_FUNCTION (function_block
));
3826 sal
->symtab
= symbol_symtab (BLOCK_FUNCTION (function_block
));
3830 /* Given PC at the function's start address, attempt to find the
3831 prologue end using SAL information. Return zero if the skip fails.
3833 A non-optimized prologue traditionally has one SAL for the function
3834 and a second for the function body. A single line function has
3835 them both pointing at the same line.
3837 An optimized prologue is similar but the prologue may contain
3838 instructions (SALs) from the instruction body. Need to skip those
3839 while not getting into the function body.
3841 The functions end point and an increasing SAL line are used as
3842 indicators of the prologue's endpoint.
3844 This code is based on the function refine_prologue_limit
3848 skip_prologue_using_sal (struct gdbarch
*gdbarch
, CORE_ADDR func_addr
)
3850 struct symtab_and_line prologue_sal
;
3853 const struct block
*bl
;
3855 /* Get an initial range for the function. */
3856 find_pc_partial_function (func_addr
, NULL
, &start_pc
, &end_pc
);
3857 start_pc
+= gdbarch_deprecated_function_start_offset (gdbarch
);
3859 prologue_sal
= find_pc_line (start_pc
, 0);
3860 if (prologue_sal
.line
!= 0)
3862 /* For languages other than assembly, treat two consecutive line
3863 entries at the same address as a zero-instruction prologue.
3864 The GNU assembler emits separate line notes for each instruction
3865 in a multi-instruction macro, but compilers generally will not
3867 if (prologue_sal
.symtab
->language
!= language_asm
)
3869 struct linetable
*linetable
= SYMTAB_LINETABLE (prologue_sal
.symtab
);
3872 /* Skip any earlier lines, and any end-of-sequence marker
3873 from a previous function. */
3874 while (linetable
->item
[idx
].pc
!= prologue_sal
.pc
3875 || linetable
->item
[idx
].line
== 0)
3878 if (idx
+1 < linetable
->nitems
3879 && linetable
->item
[idx
+1].line
!= 0
3880 && linetable
->item
[idx
+1].pc
== start_pc
)
3884 /* If there is only one sal that covers the entire function,
3885 then it is probably a single line function, like
3887 if (prologue_sal
.end
>= end_pc
)
3890 while (prologue_sal
.end
< end_pc
)
3892 struct symtab_and_line sal
;
3894 sal
= find_pc_line (prologue_sal
.end
, 0);
3897 /* Assume that a consecutive SAL for the same (or larger)
3898 line mark the prologue -> body transition. */
3899 if (sal
.line
>= prologue_sal
.line
)
3901 /* Likewise if we are in a different symtab altogether
3902 (e.g. within a file included via #include). */
3903 if (sal
.symtab
!= prologue_sal
.symtab
)
3906 /* The line number is smaller. Check that it's from the
3907 same function, not something inlined. If it's inlined,
3908 then there is no point comparing the line numbers. */
3909 bl
= block_for_pc (prologue_sal
.end
);
3912 if (block_inlined_p (bl
))
3914 if (BLOCK_FUNCTION (bl
))
3919 bl
= BLOCK_SUPERBLOCK (bl
);
3924 /* The case in which compiler's optimizer/scheduler has
3925 moved instructions into the prologue. We look ahead in
3926 the function looking for address ranges whose
3927 corresponding line number is less the first one that we
3928 found for the function. This is more conservative then
3929 refine_prologue_limit which scans a large number of SALs
3930 looking for any in the prologue. */
3935 if (prologue_sal
.end
< end_pc
)
3936 /* Return the end of this line, or zero if we could not find a
3938 return prologue_sal
.end
;
3940 /* Don't return END_PC, which is past the end of the function. */
3941 return prologue_sal
.pc
;
3944 /* If P is of the form "operator[ \t]+..." where `...' is
3945 some legitimate operator text, return a pointer to the
3946 beginning of the substring of the operator text.
3947 Otherwise, return "". */
3950 operator_chars (const char *p
, const char **end
)
3953 if (strncmp (p
, "operator", 8))
3957 /* Don't get faked out by `operator' being part of a longer
3959 if (isalpha (*p
) || *p
== '_' || *p
== '$' || *p
== '\0')
3962 /* Allow some whitespace between `operator' and the operator symbol. */
3963 while (*p
== ' ' || *p
== '\t')
3966 /* Recognize 'operator TYPENAME'. */
3968 if (isalpha (*p
) || *p
== '_' || *p
== '$')
3970 const char *q
= p
+ 1;
3972 while (isalnum (*q
) || *q
== '_' || *q
== '$')
3981 case '\\': /* regexp quoting */
3984 if (p
[2] == '=') /* 'operator\*=' */
3986 else /* 'operator\*' */
3990 else if (p
[1] == '[')
3993 error (_("mismatched quoting on brackets, "
3994 "try 'operator\\[\\]'"));
3995 else if (p
[2] == '\\' && p
[3] == ']')
3997 *end
= p
+ 4; /* 'operator\[\]' */
4001 error (_("nothing is allowed between '[' and ']'"));
4005 /* Gratuitous qoute: skip it and move on. */
4027 if (p
[0] == '-' && p
[1] == '>')
4029 /* Struct pointer member operator 'operator->'. */
4032 *end
= p
+ 3; /* 'operator->*' */
4035 else if (p
[2] == '\\')
4037 *end
= p
+ 4; /* Hopefully 'operator->\*' */
4042 *end
= p
+ 2; /* 'operator->' */
4046 if (p
[1] == '=' || p
[1] == p
[0])
4057 error (_("`operator ()' must be specified "
4058 "without whitespace in `()'"));
4063 error (_("`operator ?:' must be specified "
4064 "without whitespace in `?:'"));
4069 error (_("`operator []' must be specified "
4070 "without whitespace in `[]'"));
4074 error (_("`operator %s' not supported"), p
);
4083 /* Cache to watch for file names already seen by filename_seen. */
4085 struct filename_seen_cache
4087 /* Table of files seen so far. */
4089 /* Initial size of the table. It automagically grows from here. */
4090 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
4093 /* filename_seen_cache constructor. */
4095 static struct filename_seen_cache
*
4096 create_filename_seen_cache (void)
4098 struct filename_seen_cache
*cache
;
4100 cache
= XNEW (struct filename_seen_cache
);
4101 cache
->tab
= htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE
,
4102 filename_hash
, filename_eq
,
4103 NULL
, xcalloc
, xfree
);
4108 /* Empty the cache, but do not delete it. */
4111 clear_filename_seen_cache (struct filename_seen_cache
*cache
)
4113 htab_empty (cache
->tab
);
4116 /* filename_seen_cache destructor.
4117 This takes a void * argument as it is generally used as a cleanup. */
4120 delete_filename_seen_cache (void *ptr
)
4122 struct filename_seen_cache
*cache
= ptr
;
4124 htab_delete (cache
->tab
);
4128 /* If FILE is not already in the table of files in CACHE, return zero;
4129 otherwise return non-zero. Optionally add FILE to the table if ADD
4132 NOTE: We don't manage space for FILE, we assume FILE lives as long
4133 as the caller needs. */
4136 filename_seen (struct filename_seen_cache
*cache
, const char *file
, int add
)
4140 /* Is FILE in tab? */
4141 slot
= htab_find_slot (cache
->tab
, file
, add
? INSERT
: NO_INSERT
);
4145 /* No; maybe add it to tab. */
4147 *slot
= (char *) file
;
4152 /* Data structure to maintain printing state for output_source_filename. */
4154 struct output_source_filename_data
4156 /* Cache of what we've seen so far. */
4157 struct filename_seen_cache
*filename_seen_cache
;
4159 /* Flag of whether we're printing the first one. */
4163 /* Slave routine for sources_info. Force line breaks at ,'s.
4164 NAME is the name to print.
4165 DATA contains the state for printing and watching for duplicates. */
4168 output_source_filename (const char *name
,
4169 struct output_source_filename_data
*data
)
4171 /* Since a single source file can result in several partial symbol
4172 tables, we need to avoid printing it more than once. Note: if
4173 some of the psymtabs are read in and some are not, it gets
4174 printed both under "Source files for which symbols have been
4175 read" and "Source files for which symbols will be read in on
4176 demand". I consider this a reasonable way to deal with the
4177 situation. I'm not sure whether this can also happen for
4178 symtabs; it doesn't hurt to check. */
4180 /* Was NAME already seen? */
4181 if (filename_seen (data
->filename_seen_cache
, name
, 1))
4183 /* Yes; don't print it again. */
4187 /* No; print it and reset *FIRST. */
4189 printf_filtered (", ");
4193 fputs_filtered (name
, gdb_stdout
);
4196 /* A callback for map_partial_symbol_filenames. */
4199 output_partial_symbol_filename (const char *filename
, const char *fullname
,
4202 output_source_filename (fullname
? fullname
: filename
, data
);
4206 sources_info (char *ignore
, int from_tty
)
4208 struct compunit_symtab
*cu
;
4210 struct objfile
*objfile
;
4211 struct output_source_filename_data data
;
4212 struct cleanup
*cleanups
;
4214 if (!have_full_symbols () && !have_partial_symbols ())
4216 error (_("No symbol table is loaded. Use the \"file\" command."));
4219 data
.filename_seen_cache
= create_filename_seen_cache ();
4220 cleanups
= make_cleanup (delete_filename_seen_cache
,
4221 data
.filename_seen_cache
);
4223 printf_filtered ("Source files for which symbols have been read in:\n\n");
4226 ALL_FILETABS (objfile
, cu
, s
)
4228 const char *fullname
= symtab_to_fullname (s
);
4230 output_source_filename (fullname
, &data
);
4232 printf_filtered ("\n\n");
4234 printf_filtered ("Source files for which symbols "
4235 "will be read in on demand:\n\n");
4237 clear_filename_seen_cache (data
.filename_seen_cache
);
4239 map_symbol_filenames (output_partial_symbol_filename
, &data
,
4240 1 /*need_fullname*/);
4241 printf_filtered ("\n");
4243 do_cleanups (cleanups
);
4246 /* Compare FILE against all the NFILES entries of FILES. If BASENAMES is
4247 non-zero compare only lbasename of FILES. */
4250 file_matches (const char *file
, const char *files
[], int nfiles
, int basenames
)
4254 if (file
!= NULL
&& nfiles
!= 0)
4256 for (i
= 0; i
< nfiles
; i
++)
4258 if (compare_filenames_for_search (file
, (basenames
4259 ? lbasename (files
[i
])
4264 else if (nfiles
== 0)
4269 /* Free any memory associated with a search. */
4272 free_search_symbols (struct symbol_search
*symbols
)
4274 struct symbol_search
*p
;
4275 struct symbol_search
*next
;
4277 for (p
= symbols
; p
!= NULL
; p
= next
)
4285 do_free_search_symbols_cleanup (void *symbolsp
)
4287 struct symbol_search
*symbols
= *(struct symbol_search
**) symbolsp
;
4289 free_search_symbols (symbols
);
4293 make_cleanup_free_search_symbols (struct symbol_search
**symbolsp
)
4295 return make_cleanup (do_free_search_symbols_cleanup
, symbolsp
);
4298 /* Helper function for sort_search_symbols_remove_dups and qsort. Can only
4299 sort symbols, not minimal symbols. */
4302 compare_search_syms (const void *sa
, const void *sb
)
4304 struct symbol_search
*sym_a
= *(struct symbol_search
**) sa
;
4305 struct symbol_search
*sym_b
= *(struct symbol_search
**) sb
;
4308 c
= FILENAME_CMP (symbol_symtab (sym_a
->symbol
)->filename
,
4309 symbol_symtab (sym_b
->symbol
)->filename
);
4313 if (sym_a
->block
!= sym_b
->block
)
4314 return sym_a
->block
- sym_b
->block
;
4316 return strcmp (SYMBOL_PRINT_NAME (sym_a
->symbol
),
4317 SYMBOL_PRINT_NAME (sym_b
->symbol
));
4320 /* Sort the NFOUND symbols in list FOUND and remove duplicates.
4321 The duplicates are freed, and the new list is returned in
4322 *NEW_HEAD, *NEW_TAIL. */
4325 sort_search_symbols_remove_dups (struct symbol_search
*found
, int nfound
,
4326 struct symbol_search
**new_head
,
4327 struct symbol_search
**new_tail
)
4329 struct symbol_search
**symbols
, *symp
, *old_next
;
4332 gdb_assert (found
!= NULL
&& nfound
> 0);
4334 /* Build an array out of the list so we can easily sort them. */
4335 symbols
= (struct symbol_search
**) xmalloc (sizeof (struct symbol_search
*)
4338 for (i
= 0; i
< nfound
; i
++)
4340 gdb_assert (symp
!= NULL
);
4341 gdb_assert (symp
->block
>= 0 && symp
->block
<= 1);
4345 gdb_assert (symp
== NULL
);
4347 qsort (symbols
, nfound
, sizeof (struct symbol_search
*),
4348 compare_search_syms
);
4350 /* Collapse out the dups. */
4351 for (i
= 1, j
= 1; i
< nfound
; ++i
)
4353 if (compare_search_syms (&symbols
[j
- 1], &symbols
[i
]) != 0)
4354 symbols
[j
++] = symbols
[i
];
4359 symbols
[j
- 1]->next
= NULL
;
4361 /* Rebuild the linked list. */
4362 for (i
= 0; i
< nunique
- 1; i
++)
4363 symbols
[i
]->next
= symbols
[i
+ 1];
4364 symbols
[nunique
- 1]->next
= NULL
;
4366 *new_head
= symbols
[0];
4367 *new_tail
= symbols
[nunique
- 1];
4371 /* An object of this type is passed as the user_data to the
4372 expand_symtabs_matching method. */
4373 struct search_symbols_data
4378 /* It is true if PREG contains valid data, false otherwise. */
4379 unsigned preg_p
: 1;
4383 /* A callback for expand_symtabs_matching. */
4386 search_symbols_file_matches (const char *filename
, void *user_data
,
4389 struct search_symbols_data
*data
= user_data
;
4391 return file_matches (filename
, data
->files
, data
->nfiles
, basenames
);
4394 /* A callback for expand_symtabs_matching. */
4397 search_symbols_name_matches (const char *symname
, void *user_data
)
4399 struct search_symbols_data
*data
= user_data
;
4401 return !data
->preg_p
|| regexec (&data
->preg
, symname
, 0, NULL
, 0) == 0;
4404 /* Search the symbol table for matches to the regular expression REGEXP,
4405 returning the results in *MATCHES.
4407 Only symbols of KIND are searched:
4408 VARIABLES_DOMAIN - search all symbols, excluding functions, type names,
4409 and constants (enums)
4410 FUNCTIONS_DOMAIN - search all functions
4411 TYPES_DOMAIN - search all type names
4412 ALL_DOMAIN - an internal error for this function
4414 free_search_symbols should be called when *MATCHES is no longer needed.
4416 Within each file the results are sorted locally; each symtab's global and
4417 static blocks are separately alphabetized.
4418 Duplicate entries are removed. */
4421 search_symbols (const char *regexp
, enum search_domain kind
,
4422 int nfiles
, const char *files
[],
4423 struct symbol_search
**matches
)
4425 struct compunit_symtab
*cust
;
4426 const struct blockvector
*bv
;
4429 struct block_iterator iter
;
4431 struct objfile
*objfile
;
4432 struct minimal_symbol
*msymbol
;
4434 static const enum minimal_symbol_type types
[]
4435 = {mst_data
, mst_text
, mst_abs
};
4436 static const enum minimal_symbol_type types2
[]
4437 = {mst_bss
, mst_file_text
, mst_abs
};
4438 static const enum minimal_symbol_type types3
[]
4439 = {mst_file_data
, mst_solib_trampoline
, mst_abs
};
4440 static const enum minimal_symbol_type types4
[]
4441 = {mst_file_bss
, mst_text_gnu_ifunc
, mst_abs
};
4442 enum minimal_symbol_type ourtype
;
4443 enum minimal_symbol_type ourtype2
;
4444 enum minimal_symbol_type ourtype3
;
4445 enum minimal_symbol_type ourtype4
;
4446 struct symbol_search
*found
;
4447 struct symbol_search
*tail
;
4448 struct search_symbols_data datum
;
4451 /* OLD_CHAIN .. RETVAL_CHAIN is always freed, RETVAL_CHAIN .. current
4452 CLEANUP_CHAIN is freed only in the case of an error. */
4453 struct cleanup
*old_chain
= make_cleanup (null_cleanup
, NULL
);
4454 struct cleanup
*retval_chain
;
4456 gdb_assert (kind
<= TYPES_DOMAIN
);
4458 ourtype
= types
[kind
];
4459 ourtype2
= types2
[kind
];
4460 ourtype3
= types3
[kind
];
4461 ourtype4
= types4
[kind
];
4468 /* Make sure spacing is right for C++ operators.
4469 This is just a courtesy to make the matching less sensitive
4470 to how many spaces the user leaves between 'operator'
4471 and <TYPENAME> or <OPERATOR>. */
4473 const char *opname
= operator_chars (regexp
, &opend
);
4478 int fix
= -1; /* -1 means ok; otherwise number of
4481 if (isalpha (*opname
) || *opname
== '_' || *opname
== '$')
4483 /* There should 1 space between 'operator' and 'TYPENAME'. */
4484 if (opname
[-1] != ' ' || opname
[-2] == ' ')
4489 /* There should 0 spaces between 'operator' and 'OPERATOR'. */
4490 if (opname
[-1] == ' ')
4493 /* If wrong number of spaces, fix it. */
4496 char *tmp
= (char *) alloca (8 + fix
+ strlen (opname
) + 1);
4498 sprintf (tmp
, "operator%.*s%s", fix
, " ", opname
);
4503 errcode
= regcomp (&datum
.preg
, regexp
,
4504 REG_NOSUB
| (case_sensitivity
== case_sensitive_off
4508 char *err
= get_regcomp_error (errcode
, &datum
.preg
);
4510 make_cleanup (xfree
, err
);
4511 error (_("Invalid regexp (%s): %s"), err
, regexp
);
4514 make_regfree_cleanup (&datum
.preg
);
4517 /* Search through the partial symtabs *first* for all symbols
4518 matching the regexp. That way we don't have to reproduce all of
4519 the machinery below. */
4521 datum
.nfiles
= nfiles
;
4522 datum
.files
= files
;
4523 expand_symtabs_matching ((nfiles
== 0
4525 : search_symbols_file_matches
),
4526 search_symbols_name_matches
,
4527 NULL
, kind
, &datum
);
4529 /* Here, we search through the minimal symbol tables for functions
4530 and variables that match, and force their symbols to be read.
4531 This is in particular necessary for demangled variable names,
4532 which are no longer put into the partial symbol tables.
4533 The symbol will then be found during the scan of symtabs below.
4535 For functions, find_pc_symtab should succeed if we have debug info
4536 for the function, for variables we have to call
4537 lookup_symbol_in_objfile_from_linkage_name to determine if the variable
4539 If the lookup fails, set found_misc so that we will rescan to print
4540 any matching symbols without debug info.
4541 We only search the objfile the msymbol came from, we no longer search
4542 all objfiles. In large programs (1000s of shared libs) searching all
4543 objfiles is not worth the pain. */
4545 if (nfiles
== 0 && (kind
== VARIABLES_DOMAIN
|| kind
== FUNCTIONS_DOMAIN
))
4547 ALL_MSYMBOLS (objfile
, msymbol
)
4551 if (msymbol
->created_by_gdb
)
4554 if (MSYMBOL_TYPE (msymbol
) == ourtype
4555 || MSYMBOL_TYPE (msymbol
) == ourtype2
4556 || MSYMBOL_TYPE (msymbol
) == ourtype3
4557 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4560 || regexec (&datum
.preg
, MSYMBOL_NATURAL_NAME (msymbol
), 0,
4563 /* Note: An important side-effect of these lookup functions
4564 is to expand the symbol table if msymbol is found, for the
4565 benefit of the next loop on ALL_COMPUNITS. */
4566 if (kind
== FUNCTIONS_DOMAIN
4567 ? (find_pc_compunit_symtab
4568 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
)) == NULL
)
4569 : (lookup_symbol_in_objfile_from_linkage_name
4570 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
4581 retval_chain
= make_cleanup_free_search_symbols (&found
);
4583 ALL_COMPUNITS (objfile
, cust
)
4585 bv
= COMPUNIT_BLOCKVECTOR (cust
);
4586 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
4588 b
= BLOCKVECTOR_BLOCK (bv
, i
);
4589 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
4591 struct symtab
*real_symtab
= symbol_symtab (sym
);
4595 /* Check first sole REAL_SYMTAB->FILENAME. It does not need to be
4596 a substring of symtab_to_fullname as it may contain "./" etc. */
4597 if ((file_matches (real_symtab
->filename
, files
, nfiles
, 0)
4598 || ((basenames_may_differ
4599 || file_matches (lbasename (real_symtab
->filename
),
4601 && file_matches (symtab_to_fullname (real_symtab
),
4604 || regexec (&datum
.preg
, SYMBOL_NATURAL_NAME (sym
), 0,
4606 && ((kind
== VARIABLES_DOMAIN
4607 && SYMBOL_CLASS (sym
) != LOC_TYPEDEF
4608 && SYMBOL_CLASS (sym
) != LOC_UNRESOLVED
4609 && SYMBOL_CLASS (sym
) != LOC_BLOCK
4610 /* LOC_CONST can be used for more than just enums,
4611 e.g., c++ static const members.
4612 We only want to skip enums here. */
4613 && !(SYMBOL_CLASS (sym
) == LOC_CONST
4614 && (TYPE_CODE (SYMBOL_TYPE (sym
))
4615 == TYPE_CODE_ENUM
)))
4616 || (kind
== FUNCTIONS_DOMAIN
4617 && SYMBOL_CLASS (sym
) == LOC_BLOCK
)
4618 || (kind
== TYPES_DOMAIN
4619 && SYMBOL_CLASS (sym
) == LOC_TYPEDEF
))))
4622 struct symbol_search
*psr
= (struct symbol_search
*)
4623 xmalloc (sizeof (struct symbol_search
));
4626 memset (&psr
->msymbol
, 0, sizeof (psr
->msymbol
));
4641 sort_search_symbols_remove_dups (found
, nfound
, &found
, &tail
);
4642 /* Note: nfound is no longer useful beyond this point. */
4645 /* If there are no eyes, avoid all contact. I mean, if there are
4646 no debug symbols, then add matching minsyms. */
4648 if (found_misc
|| (nfiles
== 0 && kind
!= FUNCTIONS_DOMAIN
))
4650 ALL_MSYMBOLS (objfile
, msymbol
)
4654 if (msymbol
->created_by_gdb
)
4657 if (MSYMBOL_TYPE (msymbol
) == ourtype
4658 || MSYMBOL_TYPE (msymbol
) == ourtype2
4659 || MSYMBOL_TYPE (msymbol
) == ourtype3
4660 || MSYMBOL_TYPE (msymbol
) == ourtype4
)
4663 || regexec (&datum
.preg
, MSYMBOL_NATURAL_NAME (msymbol
), 0,
4666 /* For functions we can do a quick check of whether the
4667 symbol might be found via find_pc_symtab. */
4668 if (kind
!= FUNCTIONS_DOMAIN
4669 || (find_pc_compunit_symtab
4670 (MSYMBOL_VALUE_ADDRESS (objfile
, msymbol
)) == NULL
))
4672 if (lookup_symbol_in_objfile_from_linkage_name
4673 (objfile
, MSYMBOL_LINKAGE_NAME (msymbol
), VAR_DOMAIN
)
4677 struct symbol_search
*psr
= (struct symbol_search
*)
4678 xmalloc (sizeof (struct symbol_search
));
4680 psr
->msymbol
.minsym
= msymbol
;
4681 psr
->msymbol
.objfile
= objfile
;
4696 discard_cleanups (retval_chain
);
4697 do_cleanups (old_chain
);
4701 /* Helper function for symtab_symbol_info, this function uses
4702 the data returned from search_symbols() to print information
4703 regarding the match to gdb_stdout. */
4706 print_symbol_info (enum search_domain kind
,
4708 int block
, const char *last
)
4710 struct symtab
*s
= symbol_symtab (sym
);
4711 const char *s_filename
= symtab_to_filename_for_display (s
);
4713 if (last
== NULL
|| filename_cmp (last
, s_filename
) != 0)
4715 fputs_filtered ("\nFile ", gdb_stdout
);
4716 fputs_filtered (s_filename
, gdb_stdout
);
4717 fputs_filtered (":\n", gdb_stdout
);
4720 if (kind
!= TYPES_DOMAIN
&& block
== STATIC_BLOCK
)
4721 printf_filtered ("static ");
4723 /* Typedef that is not a C++ class. */
4724 if (kind
== TYPES_DOMAIN
4725 && SYMBOL_DOMAIN (sym
) != STRUCT_DOMAIN
)
4726 typedef_print (SYMBOL_TYPE (sym
), sym
, gdb_stdout
);
4727 /* variable, func, or typedef-that-is-c++-class. */
4728 else if (kind
< TYPES_DOMAIN
4729 || (kind
== TYPES_DOMAIN
4730 && SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
))
4732 type_print (SYMBOL_TYPE (sym
),
4733 (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
4734 ? "" : SYMBOL_PRINT_NAME (sym
)),
4737 printf_filtered (";\n");
4741 /* This help function for symtab_symbol_info() prints information
4742 for non-debugging symbols to gdb_stdout. */
4745 print_msymbol_info (struct bound_minimal_symbol msymbol
)
4747 struct gdbarch
*gdbarch
= get_objfile_arch (msymbol
.objfile
);
4750 if (gdbarch_addr_bit (gdbarch
) <= 32)
4751 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
)
4752 & (CORE_ADDR
) 0xffffffff,
4755 tmp
= hex_string_custom (BMSYMBOL_VALUE_ADDRESS (msymbol
),
4757 printf_filtered ("%s %s\n",
4758 tmp
, MSYMBOL_PRINT_NAME (msymbol
.minsym
));
4761 /* This is the guts of the commands "info functions", "info types", and
4762 "info variables". It calls search_symbols to find all matches and then
4763 print_[m]symbol_info to print out some useful information about the
4767 symtab_symbol_info (char *regexp
, enum search_domain kind
, int from_tty
)
4769 static const char * const classnames
[] =
4770 {"variable", "function", "type"};
4771 struct symbol_search
*symbols
;
4772 struct symbol_search
*p
;
4773 struct cleanup
*old_chain
;
4774 const char *last_filename
= NULL
;
4777 gdb_assert (kind
<= TYPES_DOMAIN
);
4779 /* Must make sure that if we're interrupted, symbols gets freed. */
4780 search_symbols (regexp
, kind
, 0, NULL
, &symbols
);
4781 old_chain
= make_cleanup_free_search_symbols (&symbols
);
4784 printf_filtered (_("All %ss matching regular expression \"%s\":\n"),
4785 classnames
[kind
], regexp
);
4787 printf_filtered (_("All defined %ss:\n"), classnames
[kind
]);
4789 for (p
= symbols
; p
!= NULL
; p
= p
->next
)
4793 if (p
->msymbol
.minsym
!= NULL
)
4797 printf_filtered (_("\nNon-debugging symbols:\n"));
4800 print_msymbol_info (p
->msymbol
);
4804 print_symbol_info (kind
,
4809 = symtab_to_filename_for_display (symbol_symtab (p
->symbol
));
4813 do_cleanups (old_chain
);
4817 variables_info (char *regexp
, int from_tty
)
4819 symtab_symbol_info (regexp
, VARIABLES_DOMAIN
, from_tty
);
4823 functions_info (char *regexp
, int from_tty
)
4825 symtab_symbol_info (regexp
, FUNCTIONS_DOMAIN
, from_tty
);
4830 types_info (char *regexp
, int from_tty
)
4832 symtab_symbol_info (regexp
, TYPES_DOMAIN
, from_tty
);
4835 /* Breakpoint all functions matching regular expression. */
4838 rbreak_command_wrapper (char *regexp
, int from_tty
)
4840 rbreak_command (regexp
, from_tty
);
4843 /* A cleanup function that calls end_rbreak_breakpoints. */
4846 do_end_rbreak_breakpoints (void *ignore
)
4848 end_rbreak_breakpoints ();
4852 rbreak_command (char *regexp
, int from_tty
)
4854 struct symbol_search
*ss
;
4855 struct symbol_search
*p
;
4856 struct cleanup
*old_chain
;
4857 char *string
= NULL
;
4859 const char **files
= NULL
;
4860 const char *file_name
;
4865 char *colon
= strchr (regexp
, ':');
4867 if (colon
&& *(colon
+ 1) != ':')
4872 colon_index
= colon
- regexp
;
4873 local_name
= alloca (colon_index
+ 1);
4874 memcpy (local_name
, regexp
, colon_index
);
4875 local_name
[colon_index
--] = 0;
4876 while (isspace (local_name
[colon_index
]))
4877 local_name
[colon_index
--] = 0;
4878 file_name
= local_name
;
4881 regexp
= skip_spaces (colon
+ 1);
4885 search_symbols (regexp
, FUNCTIONS_DOMAIN
, nfiles
, files
, &ss
);
4886 old_chain
= make_cleanup_free_search_symbols (&ss
);
4887 make_cleanup (free_current_contents
, &string
);
4889 start_rbreak_breakpoints ();
4890 make_cleanup (do_end_rbreak_breakpoints
, NULL
);
4891 for (p
= ss
; p
!= NULL
; p
= p
->next
)
4893 if (p
->msymbol
.minsym
== NULL
)
4895 struct symtab
*symtab
= symbol_symtab (p
->symbol
);
4896 const char *fullname
= symtab_to_fullname (symtab
);
4898 int newlen
= (strlen (fullname
)
4899 + strlen (SYMBOL_LINKAGE_NAME (p
->symbol
))
4904 string
= xrealloc (string
, newlen
);
4907 strcpy (string
, fullname
);
4908 strcat (string
, ":'");
4909 strcat (string
, SYMBOL_LINKAGE_NAME (p
->symbol
));
4910 strcat (string
, "'");
4911 break_command (string
, from_tty
);
4912 print_symbol_info (FUNCTIONS_DOMAIN
,
4915 symtab_to_filename_for_display (symtab
));
4919 int newlen
= (strlen (MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
)) + 3);
4923 string
= xrealloc (string
, newlen
);
4926 strcpy (string
, "'");
4927 strcat (string
, MSYMBOL_LINKAGE_NAME (p
->msymbol
.minsym
));
4928 strcat (string
, "'");
4930 break_command (string
, from_tty
);
4931 printf_filtered ("<function, no debug info> %s;\n",
4932 MSYMBOL_PRINT_NAME (p
->msymbol
.minsym
));
4936 do_cleanups (old_chain
);
4940 /* Evaluate if NAME matches SYM_TEXT and SYM_TEXT_LEN.
4942 Either sym_text[sym_text_len] != '(' and then we search for any
4943 symbol starting with SYM_TEXT text.
4945 Otherwise sym_text[sym_text_len] == '(' and then we require symbol name to
4946 be terminated at that point. Partial symbol tables do not have parameters
4950 compare_symbol_name (const char *name
, const char *sym_text
, int sym_text_len
)
4952 int (*ncmp
) (const char *, const char *, size_t);
4954 ncmp
= (case_sensitivity
== case_sensitive_on
? strncmp
: strncasecmp
);
4956 if (ncmp (name
, sym_text
, sym_text_len
) != 0)
4959 if (sym_text
[sym_text_len
] == '(')
4961 /* User searches for `name(someth...'. Require NAME to be terminated.
4962 Normally psymtabs and gdbindex have no parameter types so '\0' will be
4963 present but accept even parameters presence. In this case this
4964 function is in fact strcmp_iw but whitespace skipping is not supported
4965 for tab completion. */
4967 if (name
[sym_text_len
] != '\0' && name
[sym_text_len
] != '(')
4974 /* Free any memory associated with a completion list. */
4977 free_completion_list (VEC (char_ptr
) **list_ptr
)
4982 for (i
= 0; VEC_iterate (char_ptr
, *list_ptr
, i
, p
); ++i
)
4984 VEC_free (char_ptr
, *list_ptr
);
4987 /* Callback for make_cleanup. */
4990 do_free_completion_list (void *list
)
4992 free_completion_list (list
);
4995 /* Helper routine for make_symbol_completion_list. */
4997 static VEC (char_ptr
) *return_val
;
4999 #define COMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
5000 completion_list_add_name \
5001 (SYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
5003 #define MCOMPLETION_LIST_ADD_SYMBOL(symbol, sym_text, len, text, word) \
5004 completion_list_add_name \
5005 (MSYMBOL_NATURAL_NAME (symbol), (sym_text), (len), (text), (word))
5007 /* Tracker for how many unique completions have been generated. Used
5008 to terminate completion list generation early if the list has grown
5009 to a size so large as to be useless. This helps avoid GDB seeming
5010 to lock up in the event the user requests to complete on something
5011 vague that necessitates the time consuming expansion of many symbol
5014 static completion_tracker_t completion_tracker
;
5016 /* Test to see if the symbol specified by SYMNAME (which is already
5017 demangled for C++ symbols) matches SYM_TEXT in the first SYM_TEXT_LEN
5018 characters. If so, add it to the current completion list. */
5021 completion_list_add_name (const char *symname
,
5022 const char *sym_text
, int sym_text_len
,
5023 const char *text
, const char *word
)
5025 /* Clip symbols that cannot match. */
5026 if (!compare_symbol_name (symname
, sym_text
, sym_text_len
))
5029 /* We have a match for a completion, so add SYMNAME to the current list
5030 of matches. Note that the name is moved to freshly malloc'd space. */
5034 enum maybe_add_completion_enum add_status
;
5036 if (word
== sym_text
)
5038 newobj
= xmalloc (strlen (symname
) + 5);
5039 strcpy (newobj
, symname
);
5041 else if (word
> sym_text
)
5043 /* Return some portion of symname. */
5044 newobj
= xmalloc (strlen (symname
) + 5);
5045 strcpy (newobj
, symname
+ (word
- sym_text
));
5049 /* Return some of SYM_TEXT plus symname. */
5050 newobj
= xmalloc (strlen (symname
) + (sym_text
- word
) + 5);
5051 strncpy (newobj
, word
, sym_text
- word
);
5052 newobj
[sym_text
- word
] = '\0';
5053 strcat (newobj
, symname
);
5056 add_status
= maybe_add_completion (completion_tracker
, newobj
);
5060 case MAYBE_ADD_COMPLETION_OK
:
5061 VEC_safe_push (char_ptr
, return_val
, newobj
);
5063 case MAYBE_ADD_COMPLETION_OK_MAX_REACHED
:
5064 VEC_safe_push (char_ptr
, return_val
, newobj
);
5065 throw_max_completions_reached_error ();
5066 case MAYBE_ADD_COMPLETION_MAX_REACHED
:
5068 throw_max_completions_reached_error ();
5069 case MAYBE_ADD_COMPLETION_DUPLICATE
:
5076 /* ObjC: In case we are completing on a selector, look as the msymbol
5077 again and feed all the selectors into the mill. */
5080 completion_list_objc_symbol (struct minimal_symbol
*msymbol
,
5081 const char *sym_text
, int sym_text_len
,
5082 const char *text
, const char *word
)
5084 static char *tmp
= NULL
;
5085 static unsigned int tmplen
= 0;
5087 const char *method
, *category
, *selector
;
5090 method
= MSYMBOL_NATURAL_NAME (msymbol
);
5092 /* Is it a method? */
5093 if ((method
[0] != '-') && (method
[0] != '+'))
5096 if (sym_text
[0] == '[')
5097 /* Complete on shortened method method. */
5098 completion_list_add_name (method
+ 1, sym_text
, sym_text_len
, text
, word
);
5100 while ((strlen (method
) + 1) >= tmplen
)
5106 tmp
= xrealloc (tmp
, tmplen
);
5108 selector
= strchr (method
, ' ');
5109 if (selector
!= NULL
)
5112 category
= strchr (method
, '(');
5114 if ((category
!= NULL
) && (selector
!= NULL
))
5116 memcpy (tmp
, method
, (category
- method
));
5117 tmp
[category
- method
] = ' ';
5118 memcpy (tmp
+ (category
- method
) + 1, selector
, strlen (selector
) + 1);
5119 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
5120 if (sym_text
[0] == '[')
5121 completion_list_add_name (tmp
+ 1, sym_text
, sym_text_len
, text
, word
);
5124 if (selector
!= NULL
)
5126 /* Complete on selector only. */
5127 strcpy (tmp
, selector
);
5128 tmp2
= strchr (tmp
, ']');
5132 completion_list_add_name (tmp
, sym_text
, sym_text_len
, text
, word
);
5136 /* Break the non-quoted text based on the characters which are in
5137 symbols. FIXME: This should probably be language-specific. */
5140 language_search_unquoted_string (const char *text
, const char *p
)
5142 for (; p
> text
; --p
)
5144 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0')
5148 if ((current_language
->la_language
== language_objc
))
5150 if (p
[-1] == ':') /* Might be part of a method name. */
5152 else if (p
[-1] == '[' && (p
[-2] == '-' || p
[-2] == '+'))
5153 p
-= 2; /* Beginning of a method name. */
5154 else if (p
[-1] == ' ' || p
[-1] == '(' || p
[-1] == ')')
5155 { /* Might be part of a method name. */
5158 /* Seeing a ' ' or a '(' is not conclusive evidence
5159 that we are in the middle of a method name. However,
5160 finding "-[" or "+[" should be pretty un-ambiguous.
5161 Unfortunately we have to find it now to decide. */
5164 if (isalnum (t
[-1]) || t
[-1] == '_' ||
5165 t
[-1] == ' ' || t
[-1] == ':' ||
5166 t
[-1] == '(' || t
[-1] == ')')
5171 if (t
[-1] == '[' && (t
[-2] == '-' || t
[-2] == '+'))
5172 p
= t
- 2; /* Method name detected. */
5173 /* Else we leave with p unchanged. */
5183 completion_list_add_fields (struct symbol
*sym
, const char *sym_text
,
5184 int sym_text_len
, const char *text
,
5187 if (SYMBOL_CLASS (sym
) == LOC_TYPEDEF
)
5189 struct type
*t
= SYMBOL_TYPE (sym
);
5190 enum type_code c
= TYPE_CODE (t
);
5193 if (c
== TYPE_CODE_UNION
|| c
== TYPE_CODE_STRUCT
)
5194 for (j
= TYPE_N_BASECLASSES (t
); j
< TYPE_NFIELDS (t
); j
++)
5195 if (TYPE_FIELD_NAME (t
, j
))
5196 completion_list_add_name (TYPE_FIELD_NAME (t
, j
),
5197 sym_text
, sym_text_len
, text
, word
);
5201 /* Type of the user_data argument passed to add_macro_name,
5202 symbol_completion_matcher and symtab_expansion_callback. */
5204 struct add_name_data
5206 /* Arguments required by completion_list_add_name. */
5207 const char *sym_text
;
5212 /* Extra argument required for add_symtab_completions. */
5213 enum type_code code
;
5216 /* A callback used with macro_for_each and macro_for_each_in_scope.
5217 This adds a macro's name to the current completion list. */
5220 add_macro_name (const char *name
, const struct macro_definition
*ignore
,
5221 struct macro_source_file
*ignore2
, int ignore3
,
5224 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
5226 completion_list_add_name (name
,
5227 datum
->sym_text
, datum
->sym_text_len
,
5228 datum
->text
, datum
->word
);
5231 /* A callback for expand_symtabs_matching. */
5234 symbol_completion_matcher (const char *name
, void *user_data
)
5236 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
5238 return compare_symbol_name (name
, datum
->sym_text
, datum
->sym_text_len
);
5241 /* Add matching symbols from SYMTAB to the current completion list. */
5244 add_symtab_completions (struct compunit_symtab
*cust
,
5245 const char *sym_text
, int sym_text_len
,
5246 const char *text
, const char *word
,
5247 enum type_code code
)
5250 const struct block
*b
;
5251 struct block_iterator iter
;
5254 for (i
= GLOBAL_BLOCK
; i
<= STATIC_BLOCK
; i
++)
5257 b
= BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), i
);
5258 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5260 if (code
== TYPE_CODE_UNDEF
5261 || (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5262 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
))
5263 COMPLETION_LIST_ADD_SYMBOL (sym
,
5264 sym_text
, sym_text_len
,
5270 /* Callback to add completions to the current list when symbol tables
5271 are expanded during completion list generation. */
5274 symtab_expansion_callback (struct compunit_symtab
*symtab
,
5277 struct add_name_data
*datum
= (struct add_name_data
*) user_data
;
5279 add_symtab_completions (symtab
,
5280 datum
->sym_text
, datum
->sym_text_len
,
5281 datum
->text
, datum
->word
,
5286 default_make_symbol_completion_list_break_on_1 (const char *text
,
5288 const char *break_on
,
5289 enum type_code code
)
5291 /* Problem: All of the symbols have to be copied because readline
5292 frees them. I'm not going to worry about this; hopefully there
5293 won't be that many. */
5296 struct compunit_symtab
*cust
;
5297 struct minimal_symbol
*msymbol
;
5298 struct objfile
*objfile
;
5299 const struct block
*b
;
5300 const struct block
*surrounding_static_block
, *surrounding_global_block
;
5301 struct block_iterator iter
;
5302 /* The symbol we are completing on. Points in same buffer as text. */
5303 const char *sym_text
;
5304 /* Length of sym_text. */
5306 struct add_name_data datum
;
5307 struct cleanup
*cleanups
;
5309 /* Now look for the symbol we are supposed to complete on. */
5313 const char *quote_pos
= NULL
;
5315 /* First see if this is a quoted string. */
5317 for (p
= text
; *p
!= '\0'; ++p
)
5319 if (quote_found
!= '\0')
5321 if (*p
== quote_found
)
5322 /* Found close quote. */
5324 else if (*p
== '\\' && p
[1] == quote_found
)
5325 /* A backslash followed by the quote character
5326 doesn't end the string. */
5329 else if (*p
== '\'' || *p
== '"')
5335 if (quote_found
== '\'')
5336 /* A string within single quotes can be a symbol, so complete on it. */
5337 sym_text
= quote_pos
+ 1;
5338 else if (quote_found
== '"')
5339 /* A double-quoted string is never a symbol, nor does it make sense
5340 to complete it any other way. */
5346 /* It is not a quoted string. Break it based on the characters
5347 which are in symbols. */
5350 if (isalnum (p
[-1]) || p
[-1] == '_' || p
[-1] == '\0'
5351 || p
[-1] == ':' || strchr (break_on
, p
[-1]) != NULL
)
5360 sym_text_len
= strlen (sym_text
);
5362 /* Prepare SYM_TEXT_LEN for compare_symbol_name. */
5364 if (current_language
->la_language
== language_cplus
5365 || current_language
->la_language
== language_java
5366 || current_language
->la_language
== language_fortran
)
5368 /* These languages may have parameters entered by user but they are never
5369 present in the partial symbol tables. */
5371 const char *cs
= memchr (sym_text
, '(', sym_text_len
);
5374 sym_text_len
= cs
- sym_text
;
5376 gdb_assert (sym_text
[sym_text_len
] == '\0' || sym_text
[sym_text_len
] == '(');
5378 completion_tracker
= new_completion_tracker ();
5379 cleanups
= make_cleanup_free_completion_tracker (&completion_tracker
);
5381 datum
.sym_text
= sym_text
;
5382 datum
.sym_text_len
= sym_text_len
;
5387 /* At this point scan through the misc symbol vectors and add each
5388 symbol you find to the list. Eventually we want to ignore
5389 anything that isn't a text symbol (everything else will be
5390 handled by the psymtab code below). */
5392 if (code
== TYPE_CODE_UNDEF
)
5394 ALL_MSYMBOLS (objfile
, msymbol
)
5397 MCOMPLETION_LIST_ADD_SYMBOL (msymbol
, sym_text
, sym_text_len
, text
,
5400 completion_list_objc_symbol (msymbol
, sym_text
, sym_text_len
, text
,
5405 /* Add completions for all currently loaded symbol tables. */
5406 ALL_COMPUNITS (objfile
, cust
)
5407 add_symtab_completions (cust
, sym_text
, sym_text_len
, text
, word
,
5410 /* Look through the partial symtabs for all symbols which begin
5411 by matching SYM_TEXT. Expand all CUs that you find to the list.
5412 symtab_expansion_callback is called for each expanded symtab,
5413 causing those symtab's completions to be added to the list too. */
5414 expand_symtabs_matching (NULL
, symbol_completion_matcher
,
5415 symtab_expansion_callback
, ALL_DOMAIN
,
5418 /* Search upwards from currently selected frame (so that we can
5419 complete on local vars). Also catch fields of types defined in
5420 this places which match our text string. Only complete on types
5421 visible from current context. */
5423 b
= get_selected_block (0);
5424 surrounding_static_block
= block_static_block (b
);
5425 surrounding_global_block
= block_global_block (b
);
5426 if (surrounding_static_block
!= NULL
)
5427 while (b
!= surrounding_static_block
)
5431 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5433 if (code
== TYPE_CODE_UNDEF
)
5435 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
5437 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
,
5440 else if (SYMBOL_DOMAIN (sym
) == STRUCT_DOMAIN
5441 && TYPE_CODE (SYMBOL_TYPE (sym
)) == code
)
5442 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
,
5446 /* Stop when we encounter an enclosing function. Do not stop for
5447 non-inlined functions - the locals of the enclosing function
5448 are in scope for a nested function. */
5449 if (BLOCK_FUNCTION (b
) != NULL
&& block_inlined_p (b
))
5451 b
= BLOCK_SUPERBLOCK (b
);
5454 /* Add fields from the file's types; symbols will be added below. */
5456 if (code
== TYPE_CODE_UNDEF
)
5458 if (surrounding_static_block
!= NULL
)
5459 ALL_BLOCK_SYMBOLS (surrounding_static_block
, iter
, sym
)
5460 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
5462 if (surrounding_global_block
!= NULL
)
5463 ALL_BLOCK_SYMBOLS (surrounding_global_block
, iter
, sym
)
5464 completion_list_add_fields (sym
, sym_text
, sym_text_len
, text
, word
);
5467 /* Skip macros if we are completing a struct tag -- arguable but
5468 usually what is expected. */
5469 if (current_language
->la_macro_expansion
== macro_expansion_c
5470 && code
== TYPE_CODE_UNDEF
)
5472 struct macro_scope
*scope
;
5474 /* Add any macros visible in the default scope. Note that this
5475 may yield the occasional wrong result, because an expression
5476 might be evaluated in a scope other than the default. For
5477 example, if the user types "break file:line if <TAB>", the
5478 resulting expression will be evaluated at "file:line" -- but
5479 at there does not seem to be a way to detect this at
5481 scope
= default_macro_scope ();
5484 macro_for_each_in_scope (scope
->file
, scope
->line
,
5485 add_macro_name
, &datum
);
5489 /* User-defined macros are always visible. */
5490 macro_for_each (macro_user_macros
, add_macro_name
, &datum
);
5493 do_cleanups (cleanups
);
5497 default_make_symbol_completion_list_break_on (const char *text
,
5499 const char *break_on
,
5500 enum type_code code
)
5502 struct cleanup
*back_to
;
5503 volatile struct gdb_exception except
;
5506 back_to
= make_cleanup (do_free_completion_list
, &return_val
);
5508 TRY_CATCH (except
, RETURN_MASK_ERROR
)
5510 default_make_symbol_completion_list_break_on_1 (text
, word
,
5513 if (except
.reason
< 0)
5515 if (except
.error
!= MAX_COMPLETIONS_REACHED_ERROR
)
5516 throw_exception (except
);
5519 discard_cleanups (back_to
);
5524 default_make_symbol_completion_list (const char *text
, const char *word
,
5525 enum type_code code
)
5527 return default_make_symbol_completion_list_break_on (text
, word
, "", code
);
5530 /* Return a vector of all symbols (regardless of class) which begin by
5531 matching TEXT. If the answer is no symbols, then the return value
5535 make_symbol_completion_list (const char *text
, const char *word
)
5537 return current_language
->la_make_symbol_completion_list (text
, word
,
5541 /* Like make_symbol_completion_list, but only return STRUCT_DOMAIN
5542 symbols whose type code is CODE. */
5545 make_symbol_completion_type (const char *text
, const char *word
,
5546 enum type_code code
)
5548 gdb_assert (code
== TYPE_CODE_UNION
5549 || code
== TYPE_CODE_STRUCT
5550 || code
== TYPE_CODE_ENUM
);
5551 return current_language
->la_make_symbol_completion_list (text
, word
, code
);
5554 /* Like make_symbol_completion_list, but suitable for use as a
5555 completion function. */
5558 make_symbol_completion_list_fn (struct cmd_list_element
*ignore
,
5559 const char *text
, const char *word
)
5561 return make_symbol_completion_list (text
, word
);
5564 /* Like make_symbol_completion_list, but returns a list of symbols
5565 defined in a source file FILE. */
5568 make_file_symbol_completion_list (const char *text
, const char *word
,
5569 const char *srcfile
)
5574 struct block_iterator iter
;
5575 /* The symbol we are completing on. Points in same buffer as text. */
5576 const char *sym_text
;
5577 /* Length of sym_text. */
5580 /* Now look for the symbol we are supposed to complete on.
5581 FIXME: This should be language-specific. */
5585 const char *quote_pos
= NULL
;
5587 /* First see if this is a quoted string. */
5589 for (p
= text
; *p
!= '\0'; ++p
)
5591 if (quote_found
!= '\0')
5593 if (*p
== quote_found
)
5594 /* Found close quote. */
5596 else if (*p
== '\\' && p
[1] == quote_found
)
5597 /* A backslash followed by the quote character
5598 doesn't end the string. */
5601 else if (*p
== '\'' || *p
== '"')
5607 if (quote_found
== '\'')
5608 /* A string within single quotes can be a symbol, so complete on it. */
5609 sym_text
= quote_pos
+ 1;
5610 else if (quote_found
== '"')
5611 /* A double-quoted string is never a symbol, nor does it make sense
5612 to complete it any other way. */
5618 /* Not a quoted string. */
5619 sym_text
= language_search_unquoted_string (text
, p
);
5623 sym_text_len
= strlen (sym_text
);
5627 /* Find the symtab for SRCFILE (this loads it if it was not yet read
5629 s
= lookup_symtab (srcfile
);
5632 /* Maybe they typed the file with leading directories, while the
5633 symbol tables record only its basename. */
5634 const char *tail
= lbasename (srcfile
);
5637 s
= lookup_symtab (tail
);
5640 /* If we have no symtab for that file, return an empty list. */
5642 return (return_val
);
5644 /* Go through this symtab and check the externs and statics for
5645 symbols which match. */
5647 b
= BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (s
), GLOBAL_BLOCK
);
5648 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5650 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
5653 b
= BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (s
), STATIC_BLOCK
);
5654 ALL_BLOCK_SYMBOLS (b
, iter
, sym
)
5656 COMPLETION_LIST_ADD_SYMBOL (sym
, sym_text
, sym_text_len
, text
, word
);
5659 return (return_val
);
5662 /* A helper function for make_source_files_completion_list. It adds
5663 another file name to a list of possible completions, growing the
5664 list as necessary. */
5667 add_filename_to_list (const char *fname
, const char *text
, const char *word
,
5668 VEC (char_ptr
) **list
)
5671 size_t fnlen
= strlen (fname
);
5675 /* Return exactly fname. */
5676 newobj
= xmalloc (fnlen
+ 5);
5677 strcpy (newobj
, fname
);
5679 else if (word
> text
)
5681 /* Return some portion of fname. */
5682 newobj
= xmalloc (fnlen
+ 5);
5683 strcpy (newobj
, fname
+ (word
- text
));
5687 /* Return some of TEXT plus fname. */
5688 newobj
= xmalloc (fnlen
+ (text
- word
) + 5);
5689 strncpy (newobj
, word
, text
- word
);
5690 newobj
[text
- word
] = '\0';
5691 strcat (newobj
, fname
);
5693 VEC_safe_push (char_ptr
, *list
, newobj
);
5697 not_interesting_fname (const char *fname
)
5699 static const char *illegal_aliens
[] = {
5700 "_globals_", /* inserted by coff_symtab_read */
5705 for (i
= 0; illegal_aliens
[i
]; i
++)
5707 if (filename_cmp (fname
, illegal_aliens
[i
]) == 0)
5713 /* An object of this type is passed as the user_data argument to
5714 map_partial_symbol_filenames. */
5715 struct add_partial_filename_data
5717 struct filename_seen_cache
*filename_seen_cache
;
5721 VEC (char_ptr
) **list
;
5724 /* A callback for map_partial_symbol_filenames. */
5727 maybe_add_partial_symtab_filename (const char *filename
, const char *fullname
,
5730 struct add_partial_filename_data
*data
= user_data
;
5732 if (not_interesting_fname (filename
))
5734 if (!filename_seen (data
->filename_seen_cache
, filename
, 1)
5735 && filename_ncmp (filename
, data
->text
, data
->text_len
) == 0)
5737 /* This file matches for a completion; add it to the
5738 current list of matches. */
5739 add_filename_to_list (filename
, data
->text
, data
->word
, data
->list
);
5743 const char *base_name
= lbasename (filename
);
5745 if (base_name
!= filename
5746 && !filename_seen (data
->filename_seen_cache
, base_name
, 1)
5747 && filename_ncmp (base_name
, data
->text
, data
->text_len
) == 0)
5748 add_filename_to_list (base_name
, data
->text
, data
->word
, data
->list
);
5752 /* Return a vector of all source files whose names begin with matching
5753 TEXT. The file names are looked up in the symbol tables of this
5754 program. If the answer is no matchess, then the return value is
5758 make_source_files_completion_list (const char *text
, const char *word
)
5760 struct compunit_symtab
*cu
;
5762 struct objfile
*objfile
;
5763 size_t text_len
= strlen (text
);
5764 VEC (char_ptr
) *list
= NULL
;
5765 const char *base_name
;
5766 struct add_partial_filename_data datum
;
5767 struct filename_seen_cache
*filename_seen_cache
;
5768 struct cleanup
*back_to
, *cache_cleanup
;
5770 if (!have_full_symbols () && !have_partial_symbols ())
5773 back_to
= make_cleanup (do_free_completion_list
, &list
);
5775 filename_seen_cache
= create_filename_seen_cache ();
5776 cache_cleanup
= make_cleanup (delete_filename_seen_cache
,
5777 filename_seen_cache
);
5779 ALL_FILETABS (objfile
, cu
, s
)
5781 if (not_interesting_fname (s
->filename
))
5783 if (!filename_seen (filename_seen_cache
, s
->filename
, 1)
5784 && filename_ncmp (s
->filename
, text
, text_len
) == 0)
5786 /* This file matches for a completion; add it to the current
5788 add_filename_to_list (s
->filename
, text
, word
, &list
);
5792 /* NOTE: We allow the user to type a base name when the
5793 debug info records leading directories, but not the other
5794 way around. This is what subroutines of breakpoint
5795 command do when they parse file names. */
5796 base_name
= lbasename (s
->filename
);
5797 if (base_name
!= s
->filename
5798 && !filename_seen (filename_seen_cache
, base_name
, 1)
5799 && filename_ncmp (base_name
, text
, text_len
) == 0)
5800 add_filename_to_list (base_name
, text
, word
, &list
);
5804 datum
.filename_seen_cache
= filename_seen_cache
;
5807 datum
.text_len
= text_len
;
5809 map_symbol_filenames (maybe_add_partial_symtab_filename
, &datum
,
5810 0 /*need_fullname*/);
5812 do_cleanups (cache_cleanup
);
5813 discard_cleanups (back_to
);
5820 /* Return the "main_info" object for the current program space. If
5821 the object has not yet been created, create it and fill in some
5824 static struct main_info
*
5825 get_main_info (void)
5827 struct main_info
*info
= program_space_data (current_program_space
,
5828 main_progspace_key
);
5832 /* It may seem strange to store the main name in the progspace
5833 and also in whatever objfile happens to see a main name in
5834 its debug info. The reason for this is mainly historical:
5835 gdb returned "main" as the name even if no function named
5836 "main" was defined the program; and this approach lets us
5837 keep compatibility. */
5838 info
= XCNEW (struct main_info
);
5839 info
->language_of_main
= language_unknown
;
5840 set_program_space_data (current_program_space
, main_progspace_key
,
5847 /* A cleanup to destroy a struct main_info when a progspace is
5851 main_info_cleanup (struct program_space
*pspace
, void *data
)
5853 struct main_info
*info
= data
;
5856 xfree (info
->name_of_main
);
5861 set_main_name (const char *name
, enum language lang
)
5863 struct main_info
*info
= get_main_info ();
5865 if (info
->name_of_main
!= NULL
)
5867 xfree (info
->name_of_main
);
5868 info
->name_of_main
= NULL
;
5869 info
->language_of_main
= language_unknown
;
5873 info
->name_of_main
= xstrdup (name
);
5874 info
->language_of_main
= lang
;
5878 /* Deduce the name of the main procedure, and set NAME_OF_MAIN
5882 find_main_name (void)
5884 const char *new_main_name
;
5885 struct objfile
*objfile
;
5887 /* First check the objfiles to see whether a debuginfo reader has
5888 picked up the appropriate main name. Historically the main name
5889 was found in a more or less random way; this approach instead
5890 relies on the order of objfile creation -- which still isn't
5891 guaranteed to get the correct answer, but is just probably more
5893 ALL_OBJFILES (objfile
)
5895 if (objfile
->per_bfd
->name_of_main
!= NULL
)
5897 set_main_name (objfile
->per_bfd
->name_of_main
,
5898 objfile
->per_bfd
->language_of_main
);
5903 /* Try to see if the main procedure is in Ada. */
5904 /* FIXME: brobecker/2005-03-07: Another way of doing this would
5905 be to add a new method in the language vector, and call this
5906 method for each language until one of them returns a non-empty
5907 name. This would allow us to remove this hard-coded call to
5908 an Ada function. It is not clear that this is a better approach
5909 at this point, because all methods need to be written in a way
5910 such that false positives never be returned. For instance, it is
5911 important that a method does not return a wrong name for the main
5912 procedure if the main procedure is actually written in a different
5913 language. It is easy to guaranty this with Ada, since we use a
5914 special symbol generated only when the main in Ada to find the name
5915 of the main procedure. It is difficult however to see how this can
5916 be guarantied for languages such as C, for instance. This suggests
5917 that order of call for these methods becomes important, which means
5918 a more complicated approach. */
5919 new_main_name
= ada_main_name ();
5920 if (new_main_name
!= NULL
)
5922 set_main_name (new_main_name
, language_ada
);
5926 new_main_name
= d_main_name ();
5927 if (new_main_name
!= NULL
)
5929 set_main_name (new_main_name
, language_d
);
5933 new_main_name
= go_main_name ();
5934 if (new_main_name
!= NULL
)
5936 set_main_name (new_main_name
, language_go
);
5940 new_main_name
= pascal_main_name ();
5941 if (new_main_name
!= NULL
)
5943 set_main_name (new_main_name
, language_pascal
);
5947 /* The languages above didn't identify the name of the main procedure.
5948 Fallback to "main". */
5949 set_main_name ("main", language_unknown
);
5955 struct main_info
*info
= get_main_info ();
5957 if (info
->name_of_main
== NULL
)
5960 return info
->name_of_main
;
5963 /* Return the language of the main function. If it is not known,
5964 return language_unknown. */
5967 main_language (void)
5969 struct main_info
*info
= get_main_info ();
5971 if (info
->name_of_main
== NULL
)
5974 return info
->language_of_main
;
5977 /* Handle ``executable_changed'' events for the symtab module. */
5980 symtab_observer_executable_changed (void)
5982 /* NAME_OF_MAIN may no longer be the same, so reset it for now. */
5983 set_main_name (NULL
, language_unknown
);
5986 /* Return 1 if the supplied producer string matches the ARM RealView
5987 compiler (armcc). */
5990 producer_is_realview (const char *producer
)
5992 static const char *const arm_idents
[] = {
5993 "ARM C Compiler, ADS",
5994 "Thumb C Compiler, ADS",
5995 "ARM C++ Compiler, ADS",
5996 "Thumb C++ Compiler, ADS",
5997 "ARM/Thumb C/C++ Compiler, RVCT",
5998 "ARM C/C++ Compiler, RVCT"
6002 if (producer
== NULL
)
6005 for (i
= 0; i
< ARRAY_SIZE (arm_idents
); i
++)
6006 if (strncmp (producer
, arm_idents
[i
], strlen (arm_idents
[i
])) == 0)
6014 /* The next index to hand out in response to a registration request. */
6016 static int next_aclass_value
= LOC_FINAL_VALUE
;
6018 /* The maximum number of "aclass" registrations we support. This is
6019 constant for convenience. */
6020 #define MAX_SYMBOL_IMPLS (LOC_FINAL_VALUE + 10)
6022 /* The objects representing the various "aclass" values. The elements
6023 from 0 up to LOC_FINAL_VALUE-1 represent themselves, and subsequent
6024 elements are those registered at gdb initialization time. */
6026 static struct symbol_impl symbol_impl
[MAX_SYMBOL_IMPLS
];
6028 /* The globally visible pointer. This is separate from 'symbol_impl'
6029 so that it can be const. */
6031 const struct symbol_impl
*symbol_impls
= &symbol_impl
[0];
6033 /* Make sure we saved enough room in struct symbol. */
6035 gdb_static_assert (MAX_SYMBOL_IMPLS
<= (1 << SYMBOL_ACLASS_BITS
));
6037 /* Register a computed symbol type. ACLASS must be LOC_COMPUTED. OPS
6038 is the ops vector associated with this index. This returns the new
6039 index, which should be used as the aclass_index field for symbols
6043 register_symbol_computed_impl (enum address_class aclass
,
6044 const struct symbol_computed_ops
*ops
)
6046 int result
= next_aclass_value
++;
6048 gdb_assert (aclass
== LOC_COMPUTED
);
6049 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
6050 symbol_impl
[result
].aclass
= aclass
;
6051 symbol_impl
[result
].ops_computed
= ops
;
6053 /* Sanity check OPS. */
6054 gdb_assert (ops
!= NULL
);
6055 gdb_assert (ops
->tracepoint_var_ref
!= NULL
);
6056 gdb_assert (ops
->describe_location
!= NULL
);
6057 gdb_assert (ops
->read_needs_frame
!= NULL
);
6058 gdb_assert (ops
->read_variable
!= NULL
);
6063 /* Register a function with frame base type. ACLASS must be LOC_BLOCK.
6064 OPS is the ops vector associated with this index. This returns the
6065 new index, which should be used as the aclass_index field for symbols
6069 register_symbol_block_impl (enum address_class aclass
,
6070 const struct symbol_block_ops
*ops
)
6072 int result
= next_aclass_value
++;
6074 gdb_assert (aclass
== LOC_BLOCK
);
6075 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
6076 symbol_impl
[result
].aclass
= aclass
;
6077 symbol_impl
[result
].ops_block
= ops
;
6079 /* Sanity check OPS. */
6080 gdb_assert (ops
!= NULL
);
6081 gdb_assert (ops
->find_frame_base_location
!= NULL
);
6086 /* Register a register symbol type. ACLASS must be LOC_REGISTER or
6087 LOC_REGPARM_ADDR. OPS is the register ops vector associated with
6088 this index. This returns the new index, which should be used as
6089 the aclass_index field for symbols of this type. */
6092 register_symbol_register_impl (enum address_class aclass
,
6093 const struct symbol_register_ops
*ops
)
6095 int result
= next_aclass_value
++;
6097 gdb_assert (aclass
== LOC_REGISTER
|| aclass
== LOC_REGPARM_ADDR
);
6098 gdb_assert (result
< MAX_SYMBOL_IMPLS
);
6099 symbol_impl
[result
].aclass
= aclass
;
6100 symbol_impl
[result
].ops_register
= ops
;
6105 /* Initialize elements of 'symbol_impl' for the constants in enum
6109 initialize_ordinary_address_classes (void)
6113 for (i
= 0; i
< LOC_FINAL_VALUE
; ++i
)
6114 symbol_impl
[i
].aclass
= i
;
6119 /* Helper function to initialize the fields of an objfile-owned symbol.
6120 It assumed that *SYM is already all zeroes. */
6123 initialize_objfile_symbol_1 (struct symbol
*sym
)
6125 SYMBOL_OBJFILE_OWNED (sym
) = 1;
6126 SYMBOL_SECTION (sym
) = -1;
6129 /* Initialize the symbol SYM, and mark it as being owned by an objfile. */
6132 initialize_objfile_symbol (struct symbol
*sym
)
6134 memset (sym
, 0, sizeof (*sym
));
6135 initialize_objfile_symbol_1 (sym
);
6138 /* Allocate and initialize a new 'struct symbol' on OBJFILE's
6142 allocate_symbol (struct objfile
*objfile
)
6144 struct symbol
*result
;
6146 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct symbol
);
6147 initialize_objfile_symbol_1 (result
);
6152 /* Allocate and initialize a new 'struct template_symbol' on OBJFILE's
6155 struct template_symbol
*
6156 allocate_template_symbol (struct objfile
*objfile
)
6158 struct template_symbol
*result
;
6160 result
= OBSTACK_ZALLOC (&objfile
->objfile_obstack
, struct template_symbol
);
6161 initialize_objfile_symbol_1 (&result
->base
);
6169 symbol_objfile (const struct symbol
*symbol
)
6171 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6172 return SYMTAB_OBJFILE (symbol
->owner
.symtab
);
6178 symbol_arch (const struct symbol
*symbol
)
6180 if (!SYMBOL_OBJFILE_OWNED (symbol
))
6181 return symbol
->owner
.arch
;
6182 return get_objfile_arch (SYMTAB_OBJFILE (symbol
->owner
.symtab
));
6188 symbol_symtab (const struct symbol
*symbol
)
6190 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6191 return symbol
->owner
.symtab
;
6197 symbol_set_symtab (struct symbol
*symbol
, struct symtab
*symtab
)
6199 gdb_assert (SYMBOL_OBJFILE_OWNED (symbol
));
6200 symbol
->owner
.symtab
= symtab
;
6206 _initialize_symtab (void)
6208 initialize_ordinary_address_classes ();
6211 = register_program_space_data_with_cleanup (NULL
, main_info_cleanup
);
6214 = register_program_space_data_with_cleanup (NULL
, symbol_cache_cleanup
);
6216 add_info ("variables", variables_info
, _("\
6217 All global and static variable names, or those matching REGEXP."));
6219 add_com ("whereis", class_info
, variables_info
, _("\
6220 All global and static variable names, or those matching REGEXP."));
6222 add_info ("functions", functions_info
,
6223 _("All function names, or those matching REGEXP."));
6225 /* FIXME: This command has at least the following problems:
6226 1. It prints builtin types (in a very strange and confusing fashion).
6227 2. It doesn't print right, e.g. with
6228 typedef struct foo *FOO
6229 type_print prints "FOO" when we want to make it (in this situation)
6230 print "struct foo *".
6231 I also think "ptype" or "whatis" is more likely to be useful (but if
6232 there is much disagreement "info types" can be fixed). */
6233 add_info ("types", types_info
,
6234 _("All type names, or those matching REGEXP."));
6236 add_info ("sources", sources_info
,
6237 _("Source files in the program."));
6239 add_com ("rbreak", class_breakpoint
, rbreak_command
,
6240 _("Set a breakpoint for all functions matching REGEXP."));
6244 add_com ("lf", class_info
, sources_info
,
6245 _("Source files in the program"));
6246 add_com ("lg", class_info
, variables_info
, _("\
6247 All global and static variable names, or those matching REGEXP."));
6250 add_setshow_enum_cmd ("multiple-symbols", no_class
,
6251 multiple_symbols_modes
, &multiple_symbols_mode
,
6253 Set the debugger behavior when more than one symbol are possible matches\n\
6254 in an expression."), _("\
6255 Show how the debugger handles ambiguities in expressions."), _("\
6256 Valid values are \"ask\", \"all\", \"cancel\", and the default is \"all\"."),
6257 NULL
, NULL
, &setlist
, &showlist
);
6259 add_setshow_boolean_cmd ("basenames-may-differ", class_obscure
,
6260 &basenames_may_differ
, _("\
6261 Set whether a source file may have multiple base names."), _("\
6262 Show whether a source file may have multiple base names."), _("\
6263 (A \"base name\" is the name of a file with the directory part removed.\n\
6264 Example: The base name of \"/home/user/hello.c\" is \"hello.c\".)\n\
6265 If set, GDB will canonicalize file names (e.g., expand symlinks)\n\
6266 before comparing them. Canonicalization is an expensive operation,\n\
6267 but it allows the same file be known by more than one base name.\n\
6268 If not set (the default), all source files are assumed to have just\n\
6269 one base name, and gdb will do file name comparisons more efficiently."),
6271 &setlist
, &showlist
);
6273 add_setshow_zuinteger_cmd ("symtab-create", no_class
, &symtab_create_debug
,
6274 _("Set debugging of symbol table creation."),
6275 _("Show debugging of symbol table creation."), _("\
6276 When enabled (non-zero), debugging messages are printed when building\n\
6277 symbol tables. A value of 1 (one) normally provides enough information.\n\
6278 A value greater than 1 provides more verbose information."),
6281 &setdebuglist
, &showdebuglist
);
6283 add_setshow_zuinteger_cmd ("symbol-lookup", no_class
, &symbol_lookup_debug
,
6285 Set debugging of symbol lookup."), _("\
6286 Show debugging of symbol lookup."), _("\
6287 When enabled (non-zero), symbol lookups are logged."),
6289 &setdebuglist
, &showdebuglist
);
6291 add_setshow_zuinteger_cmd ("symbol-cache-size", no_class
,
6292 &new_symbol_cache_size
,
6293 _("Set the size of the symbol cache."),
6294 _("Show the size of the symbol cache."), _("\
6295 The size of the symbol cache.\n\
6296 If zero then the symbol cache is disabled."),
6297 set_symbol_cache_size_handler
, NULL
,
6298 &maintenance_set_cmdlist
,
6299 &maintenance_show_cmdlist
);
6301 add_cmd ("symbol-cache", class_maintenance
, maintenance_print_symbol_cache
,
6302 _("Dump the symbol cache for each program space."),
6303 &maintenanceprintlist
);
6305 add_cmd ("symbol-cache-statistics", class_maintenance
,
6306 maintenance_print_symbol_cache_statistics
,
6307 _("Print symbol cache statistics for each program space."),
6308 &maintenanceprintlist
);
6310 add_cmd ("flush-symbol-cache", class_maintenance
,
6311 maintenance_flush_symbol_cache
,
6312 _("Flush the symbol cache for each program space."),
6315 observer_attach_executable_changed (symtab_observer_executable_changed
);
6316 observer_attach_new_objfile (symtab_new_objfile_observer
);
6317 observer_attach_free_objfile (symtab_free_objfile_observer
);