1 /* Helper routines for C++ support in GDB.
2 Copyright (C) 2003-2016 Free Software Foundation, Inc.
4 Contributed by David Carlton and by Kealia, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "cp-support.h"
23 #include "gdb_obstack.h"
29 #include "dictionary.h"
34 #include "namespace.h"
36 static struct block_symbol
37 cp_lookup_nested_symbol_1 (struct type
*container_type
,
38 const char *nested_name
,
39 const char *concatenated_name
,
40 const struct block
*block
,
41 const domain_enum domain
,
42 int basic_lookup
, int is_in_anonymous
);
44 static struct type
*cp_lookup_transparent_type_loop (const char *name
,
48 /* Check to see if SYMBOL refers to an object contained within an
49 anonymous namespace; if so, add an appropriate using directive. */
52 cp_scan_for_anonymous_namespaces (const struct symbol
*const symbol
,
53 struct objfile
*const objfile
)
55 if (SYMBOL_DEMANGLED_NAME (symbol
) != NULL
)
57 const char *name
= SYMBOL_DEMANGLED_NAME (symbol
);
58 unsigned int previous_component
;
59 unsigned int next_component
;
61 /* Start with a quick-and-dirty check for mention of "(anonymous
64 if (!cp_is_in_anonymous (name
))
67 previous_component
= 0;
68 next_component
= cp_find_first_component (name
+ previous_component
);
70 while (name
[next_component
] == ':')
72 if (((next_component
- previous_component
)
73 == CP_ANONYMOUS_NAMESPACE_LEN
)
74 && strncmp (name
+ previous_component
,
75 CP_ANONYMOUS_NAMESPACE_STR
,
76 CP_ANONYMOUS_NAMESPACE_LEN
) == 0)
78 int dest_len
= (previous_component
== 0
79 ? 0 : previous_component
- 2);
80 int src_len
= next_component
;
82 char *dest
= (char *) alloca (dest_len
+ 1);
83 char *src
= (char *) alloca (src_len
+ 1);
85 memcpy (dest
, name
, dest_len
);
86 memcpy (src
, name
, src_len
);
88 dest
[dest_len
] = '\0';
91 /* We've found a component of the name that's an
92 anonymous namespace. So add symbols in it to the
93 namespace given by the previous component if there is
94 one, or to the global namespace if there isn't. */
95 add_using_directive (&local_using_directives
,
96 dest
, src
, NULL
, NULL
, NULL
, 1,
97 &objfile
->objfile_obstack
);
99 /* The "+ 2" is for the "::". */
100 previous_component
= next_component
+ 2;
101 next_component
= (previous_component
102 + cp_find_first_component (name
103 + previous_component
));
108 /* Test whether or not NAMESPACE looks like it mentions an anonymous
109 namespace; return nonzero if so. */
112 cp_is_in_anonymous (const char *symbol_name
)
114 return (strstr (symbol_name
, CP_ANONYMOUS_NAMESPACE_STR
)
118 /* Look up NAME in DOMAIN in BLOCK's static block and in global blocks.
119 If IS_IN_ANONYMOUS is nonzero, the symbol in question is located
120 within an anonymous namespace. */
122 static struct block_symbol
123 cp_basic_lookup_symbol (const char *name
, const struct block
*block
,
124 const domain_enum domain
, int is_in_anonymous
)
126 struct block_symbol sym
;
128 sym
= lookup_symbol_in_static_block (name
, block
, domain
);
129 if (sym
.symbol
!= NULL
)
134 /* Symbols defined in anonymous namespaces have external linkage
135 but should be treated as local to a single file nonetheless.
136 So we only search the current file's global block. */
138 const struct block
*global_block
= block_global_block (block
);
140 if (global_block
!= NULL
)
142 sym
.symbol
= lookup_symbol_in_block (name
, global_block
, domain
);
143 sym
.block
= global_block
;
147 sym
= lookup_global_symbol (name
, block
, domain
);
152 /* Search bare symbol NAME in DOMAIN in BLOCK.
153 NAME is guaranteed to not have any scope (no "::") in its name, though
154 if for example NAME is a template spec then "::" may appear in the
156 If LANGDEF is non-NULL then try to lookup NAME as a primitive type in
157 that language. Normally we wouldn't need LANGDEF but fortran also uses
159 If SEARCH is non-zero then see if we can determine "this" from BLOCK, and
160 if so then also search for NAME in that class. */
162 static struct block_symbol
163 cp_lookup_bare_symbol (const struct language_defn
*langdef
,
164 const char *name
, const struct block
*block
,
165 const domain_enum domain
, int search
)
167 struct block_symbol sym
;
169 /* Note: We can't do a simple assert for ':' not being in NAME because
170 ':' may be in the args of a template spec. This isn't intended to be
171 a complete test, just cheap and documentary. */
172 if (strchr (name
, '<') == NULL
&& strchr (name
, '(') == NULL
)
173 gdb_assert (strstr (name
, "::") == NULL
);
175 sym
= lookup_symbol_in_static_block (name
, block
, domain
);
176 if (sym
.symbol
!= NULL
)
179 /* If we didn't find a definition for a builtin type in the static block,
180 search for it now. This is actually the right thing to do and can be
181 a massive performance win. E.g., when debugging a program with lots of
182 shared libraries we could search all of them only to find out the
183 builtin type isn't defined in any of them. This is common for types
185 if (langdef
!= NULL
&& domain
== VAR_DOMAIN
)
187 struct gdbarch
*gdbarch
;
190 gdbarch
= target_gdbarch ();
192 gdbarch
= block_gdbarch (block
);
194 = language_lookup_primitive_type_as_symbol (langdef
, gdbarch
, name
);
196 if (sym
.symbol
!= NULL
)
200 sym
= lookup_global_symbol (name
, block
, domain
);
201 if (sym
.symbol
!= NULL
)
206 struct block_symbol lang_this
;
209 lang_this
= lookup_language_this (language_def (language_cplus
), block
);
210 if (lang_this
.symbol
== NULL
)
211 return null_block_symbol
;
213 type
= check_typedef (TYPE_TARGET_TYPE (SYMBOL_TYPE (lang_this
.symbol
)));
214 /* If TYPE_NAME is NULL, abandon trying to find this symbol.
215 This can happen for lambda functions compiled with clang++,
216 which outputs no name for the container class. */
217 if (TYPE_NAME (type
) == NULL
)
218 return null_block_symbol
;
220 /* Look for symbol NAME in this class. */
221 sym
= cp_lookup_nested_symbol (type
, name
, block
, domain
);
227 /* Search NAME in DOMAIN in all static blocks, and then in all baseclasses.
228 BLOCK specifies the context in which to perform the search.
229 NAME is guaranteed to have scope (contain "::") and PREFIX_LEN specifies
230 the length of the entire scope of NAME (up to, but not including, the last
233 Note: At least in the case of Fortran, which also uses this code, there
234 may be no text after the last "::". */
236 static struct block_symbol
237 cp_search_static_and_baseclasses (const char *name
,
238 const struct block
*block
,
239 const domain_enum domain
,
240 unsigned int prefix_len
,
243 struct block_symbol sym
;
244 char *klass
, *nested
;
245 struct cleanup
*cleanup
;
246 struct block_symbol klass_sym
;
247 struct type
*klass_type
;
249 /* Check for malformed input. */
250 if (prefix_len
+ 2 > strlen (name
) || name
[prefix_len
+ 1] != ':')
251 return null_block_symbol
;
253 /* Find the name of the class and the name of the method, variable, etc. */
255 /* The class name is everything up to and including PREFIX_LEN. */
256 klass
= savestring (name
, prefix_len
);
258 /* The rest of the name is everything else past the initial scope
260 nested
= xstrdup (name
+ prefix_len
+ 2);
262 /* Add cleanups to free memory for these strings. */
263 cleanup
= make_cleanup (xfree
, klass
);
264 make_cleanup (xfree
, nested
);
266 /* Lookup a class named KLASS. If none is found, there is nothing
267 more that can be done. KLASS could be a namespace, so always look
268 in VAR_DOMAIN. This works for classes too because of
269 symbol_matches_domain (which should be replaced with something else,
270 but it's what we have today). */
271 klass_sym
= lookup_global_symbol (klass
, block
, VAR_DOMAIN
);
272 if (klass_sym
.symbol
== NULL
)
274 do_cleanups (cleanup
);
275 return null_block_symbol
;
277 klass_type
= SYMBOL_TYPE (klass_sym
.symbol
);
279 /* Look for a symbol named NESTED in this class.
280 The caller is assumed to have already have done a basic lookup of NAME.
281 So we pass zero for BASIC_LOOKUP to cp_lookup_nested_symbol_1 here. */
282 sym
= cp_lookup_nested_symbol_1 (klass_type
, nested
, name
, block
, domain
,
285 do_cleanups (cleanup
);
289 /* Look up NAME in the C++ namespace NAMESPACE. Other arguments are
290 as in cp_lookup_symbol_nonlocal. If SEARCH is non-zero, search
291 through base classes for a matching symbol.
293 Note: Part of the complexity is because NAME may itself specify scope.
294 Part of the complexity is also because this handles the case where
295 there is no scoping in which case we also try looking in the class of
296 "this" if we can compute it. */
298 static struct block_symbol
299 cp_lookup_symbol_in_namespace (const char *the_namespace
, const char *name
,
300 const struct block
*block
,
301 const domain_enum domain
, int search
)
303 char *concatenated_name
= NULL
;
305 unsigned int prefix_len
;
306 struct block_symbol sym
;
308 if (the_namespace
[0] != '\0')
311 = (char *) alloca (strlen (the_namespace
) + 2 + strlen (name
) + 1);
312 strcpy (concatenated_name
, the_namespace
);
313 strcat (concatenated_name
, "::");
314 strcat (concatenated_name
, name
);
315 name
= concatenated_name
;
318 prefix_len
= cp_entire_prefix_len (name
);
320 return cp_lookup_bare_symbol (NULL
, name
, block
, domain
, search
);
322 /* This would be simpler if we just called cp_lookup_nested_symbol
323 at this point. But that would require first looking up the containing
324 class/namespace. Since we're only searching static and global blocks
325 there's often no need to first do that lookup. */
328 = the_namespace
[0] != '\0' && cp_is_in_anonymous (the_namespace
);
329 sym
= cp_basic_lookup_symbol (name
, block
, domain
, is_in_anonymous
);
330 if (sym
.symbol
!= NULL
)
334 sym
= cp_search_static_and_baseclasses (name
, block
, domain
, prefix_len
,
340 /* Used for cleanups to reset the "searched" flag in case of an error. */
343 reset_directive_searched (void *data
)
345 struct using_direct
*direct
= (struct using_direct
*) data
;
346 direct
->searched
= 0;
349 /* Search for NAME by applying all import statements belonging to
350 BLOCK which are applicable in SCOPE. If DECLARATION_ONLY the
351 search is restricted to using declarations.
359 If SEARCH_PARENTS the search will include imports which are
360 applicable in parents of SCOPE.
370 If SCOPE is "A::B" and SEARCH_PARENTS is true the imports of
371 namespaces X and Y will be considered. If SEARCH_PARENTS is false
372 only the import of Y is considered.
374 SEARCH_SCOPE_FIRST is an internal implementation detail: Callers must
375 pass 0 for it. Internally we pass 1 when recursing. */
377 static struct block_symbol
378 cp_lookup_symbol_via_imports (const char *scope
,
380 const struct block
*block
,
381 const domain_enum domain
,
382 const int search_scope_first
,
383 const int declaration_only
,
384 const int search_parents
)
386 struct using_direct
*current
;
387 struct block_symbol sym
;
390 struct cleanup
*searched_cleanup
;
395 /* First, try to find the symbol in the given namespace if requested. */
396 if (search_scope_first
)
397 sym
= cp_lookup_symbol_in_namespace (scope
, name
,
400 if (sym
.symbol
!= NULL
)
403 /* Go through the using directives. If any of them add new names to
404 the namespace we're searching in, see if we can find a match by
407 for (current
= block_using (block
);
409 current
= current
->next
)
411 const char **excludep
;
413 len
= strlen (current
->import_dest
);
414 directive_match
= (search_parents
415 ? (startswith (scope
, current
->import_dest
)
418 || scope
[len
] == '\0'))
419 : strcmp (scope
, current
->import_dest
) == 0);
421 /* If the import destination is the current scope or one of its
422 ancestors then it is applicable. */
423 if (directive_match
&& !current
->searched
)
425 /* Mark this import as searched so that the recursive call
426 does not search it again. */
427 current
->searched
= 1;
428 searched_cleanup
= make_cleanup (reset_directive_searched
,
431 /* If there is an import of a single declaration, compare the
432 imported declaration (after optional renaming by its alias)
433 with the sought out name. If there is a match pass
434 current->import_src as NAMESPACE to direct the search
435 towards the imported namespace. */
436 if (current
->declaration
437 && strcmp (name
, current
->alias
438 ? current
->alias
: current
->declaration
) == 0)
439 sym
= cp_lookup_symbol_in_namespace (current
->import_src
,
440 current
->declaration
,
443 /* If this is a DECLARATION_ONLY search or a symbol was found
444 or this import statement was an import declaration, the
445 search of this import is complete. */
446 if (declaration_only
|| sym
.symbol
!= NULL
|| current
->declaration
)
448 current
->searched
= 0;
449 discard_cleanups (searched_cleanup
);
451 if (sym
.symbol
!= NULL
)
457 /* Do not follow CURRENT if NAME matches its EXCLUDES. */
458 for (excludep
= current
->excludes
; *excludep
; excludep
++)
459 if (strcmp (name
, *excludep
) == 0)
463 discard_cleanups (searched_cleanup
);
467 if (current
->alias
!= NULL
468 && strcmp (name
, current
->alias
) == 0)
469 /* If the import is creating an alias and the alias matches
470 the sought name. Pass current->import_src as the NAME to
471 direct the search towards the aliased namespace. */
473 sym
= cp_lookup_symbol_in_namespace (scope
,
477 else if (current
->alias
== NULL
)
479 /* If this import statement creates no alias, pass
480 current->inner as NAMESPACE to direct the search
481 towards the imported namespace. */
482 sym
= cp_lookup_symbol_via_imports (current
->import_src
,
486 current
->searched
= 0;
487 discard_cleanups (searched_cleanup
);
489 if (sym
.symbol
!= NULL
)
494 return null_block_symbol
;
497 /* Helper function that searches an array of symbols for one named NAME. */
499 static struct symbol
*
500 search_symbol_list (const char *name
, int num
,
501 struct symbol
**syms
)
505 /* Maybe we should store a dictionary in here instead. */
506 for (i
= 0; i
< num
; ++i
)
508 if (strcmp (name
, SYMBOL_NATURAL_NAME (syms
[i
])) == 0)
514 /* Like cp_lookup_symbol_via_imports, but if BLOCK is a function, it
515 searches through the template parameters of the function and the
519 cp_lookup_symbol_imports_or_template (const char *scope
,
521 const struct block
*block
,
522 const domain_enum domain
)
524 struct symbol
*function
= BLOCK_FUNCTION (block
);
525 struct block_symbol result
;
527 if (symbol_lookup_debug
)
529 fprintf_unfiltered (gdb_stdlog
,
530 "cp_lookup_symbol_imports_or_template"
531 " (%s, %s, %s, %s)\n",
532 scope
, name
, host_address_to_string (block
),
533 domain_name (domain
));
536 if (function
!= NULL
&& SYMBOL_LANGUAGE (function
) == language_cplus
)
538 /* Search the function's template parameters. */
539 if (SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION (function
))
541 struct template_symbol
*templ
542 = (struct template_symbol
*) function
;
543 struct symbol
*sym
= search_symbol_list (name
,
544 templ
->n_template_arguments
,
545 templ
->template_arguments
);
549 if (symbol_lookup_debug
)
551 fprintf_unfiltered (gdb_stdlog
,
552 "cp_lookup_symbol_imports_or_template"
554 host_address_to_string (sym
));
556 return (struct block_symbol
) {sym
, block
};
560 /* Search the template parameters of the function's defining
562 if (SYMBOL_NATURAL_NAME (function
))
564 struct type
*context
;
565 char *name_copy
= xstrdup (SYMBOL_NATURAL_NAME (function
));
566 struct cleanup
*cleanups
= make_cleanup (xfree
, name_copy
);
567 const struct language_defn
*lang
= language_def (language_cplus
);
568 struct gdbarch
*arch
= symbol_arch (function
);
569 const struct block
*parent
= BLOCK_SUPERBLOCK (block
);
574 unsigned int prefix_len
= cp_entire_prefix_len (name_copy
);
580 name_copy
[prefix_len
] = '\0';
581 context
= lookup_typename (lang
, arch
,
590 = search_symbol_list (name
,
591 TYPE_N_TEMPLATE_ARGUMENTS (context
),
592 TYPE_TEMPLATE_ARGUMENTS (context
));
595 do_cleanups (cleanups
);
596 if (symbol_lookup_debug
)
600 "cp_lookup_symbol_imports_or_template (...) = %s\n",
601 host_address_to_string (sym
));
603 return (struct block_symbol
) {sym
, parent
};
607 do_cleanups (cleanups
);
611 result
= cp_lookup_symbol_via_imports (scope
, name
, block
, domain
, 0, 1, 1);
612 if (symbol_lookup_debug
)
614 fprintf_unfiltered (gdb_stdlog
,
615 "cp_lookup_symbol_imports_or_template (...) = %s\n",
616 result
.symbol
!= NULL
617 ? host_address_to_string (result
.symbol
) : "NULL");
622 /* Search for NAME by applying relevant import statements belonging to BLOCK
623 and its parents. SCOPE is the namespace scope of the context in which the
624 search is being evaluated. */
626 static struct block_symbol
627 cp_lookup_symbol_via_all_imports (const char *scope
, const char *name
,
628 const struct block
*block
,
629 const domain_enum domain
)
631 struct block_symbol sym
;
633 while (block
!= NULL
)
635 sym
= cp_lookup_symbol_via_imports (scope
, name
, block
, domain
, 0, 0, 1);
639 block
= BLOCK_SUPERBLOCK (block
);
642 return null_block_symbol
;
645 /* Searches for NAME in the current namespace, and by applying
646 relevant import statements belonging to BLOCK and its parents.
647 SCOPE is the namespace scope of the context in which the search is
651 cp_lookup_symbol_namespace (const char *scope
,
653 const struct block
*block
,
654 const domain_enum domain
)
656 struct block_symbol sym
;
658 if (symbol_lookup_debug
)
660 fprintf_unfiltered (gdb_stdlog
,
661 "cp_lookup_symbol_namespace (%s, %s, %s, %s)\n",
662 scope
, name
, host_address_to_string (block
),
663 domain_name (domain
));
666 /* First, try to find the symbol in the given namespace. */
667 sym
= cp_lookup_symbol_in_namespace (scope
, name
, block
, domain
, 1);
669 /* Search for name in namespaces imported to this and parent blocks. */
670 if (sym
.symbol
== NULL
)
671 sym
= cp_lookup_symbol_via_all_imports (scope
, name
, block
, domain
);
673 if (symbol_lookup_debug
)
675 fprintf_unfiltered (gdb_stdlog
,
676 "cp_lookup_symbol_namespace (...) = %s\n",
678 ? host_address_to_string (sym
.symbol
) : "NULL");
683 /* Lookup NAME at namespace scope (or, in C terms, in static and
684 global variables). SCOPE is the namespace that the current
685 function is defined within; only consider namespaces whose length
686 is at least SCOPE_LEN. Other arguments are as in
687 cp_lookup_symbol_nonlocal.
689 For example, if we're within a function A::B::f and looking for a
690 symbol x, this will get called with NAME = "x", SCOPE = "A::B", and
691 SCOPE_LEN = 0. It then calls itself with NAME and SCOPE the same,
692 but with SCOPE_LEN = 1. And then it calls itself with NAME and
693 SCOPE the same, but with SCOPE_LEN = 4. This third call looks for
694 "A::B::x"; if it doesn't find it, then the second call looks for
695 "A::x", and if that call fails, then the first call looks for
698 static struct block_symbol
699 lookup_namespace_scope (const struct language_defn
*langdef
,
701 const struct block
*block
,
702 const domain_enum domain
,
708 if (scope
[scope_len
] != '\0')
710 /* Recursively search for names in child namespaces first. */
712 struct block_symbol sym
;
713 int new_scope_len
= scope_len
;
715 /* If the current scope is followed by "::", skip past that. */
716 if (new_scope_len
!= 0)
718 gdb_assert (scope
[new_scope_len
] == ':');
721 new_scope_len
+= cp_find_first_component (scope
+ new_scope_len
);
722 sym
= lookup_namespace_scope (langdef
, name
, block
, domain
,
723 scope
, new_scope_len
);
724 if (sym
.symbol
!= NULL
)
728 /* Okay, we didn't find a match in our children, so look for the
729 name in the current namespace.
731 If we there is no scope and we know we have a bare symbol, then short
732 circuit everything and call cp_lookup_bare_symbol directly.
733 This isn't an optimization, rather it allows us to pass LANGDEF which
734 is needed for primitive type lookup. The test doesn't have to be
735 perfect: if NAME is a bare symbol that our test doesn't catch (e.g., a
736 template symbol with "::" in the argument list) then
737 cp_lookup_symbol_in_namespace will catch it. */
739 if (scope_len
== 0 && strchr (name
, ':') == NULL
)
740 return cp_lookup_bare_symbol (langdef
, name
, block
, domain
, 1);
742 the_namespace
= (char *) alloca (scope_len
+ 1);
743 strncpy (the_namespace
, scope
, scope_len
);
744 the_namespace
[scope_len
] = '\0';
745 return cp_lookup_symbol_in_namespace (the_namespace
, name
,
749 /* The C++-specific version of name lookup for static and global
750 names. This makes sure that names get looked for in all namespaces
751 that are in scope. NAME is the natural name of the symbol that
752 we're looking for, BLOCK is the block that we're searching within,
753 DOMAIN says what kind of symbols we're looking for. */
756 cp_lookup_symbol_nonlocal (const struct language_defn
*langdef
,
758 const struct block
*block
,
759 const domain_enum domain
)
761 struct block_symbol sym
;
762 const char *scope
= block_scope (block
);
764 if (symbol_lookup_debug
)
766 fprintf_unfiltered (gdb_stdlog
,
767 "cp_lookup_symbol_non_local"
768 " (%s, %s (scope %s), %s)\n",
769 name
, host_address_to_string (block
), scope
,
770 domain_name (domain
));
773 /* First, try to find the symbol in the given namespace, and all
774 containing namespaces. */
775 sym
= lookup_namespace_scope (langdef
, name
, block
, domain
, scope
, 0);
777 /* Search for name in namespaces imported to this and parent blocks. */
778 if (sym
.symbol
== NULL
)
779 sym
= cp_lookup_symbol_via_all_imports (scope
, name
, block
, domain
);
781 if (symbol_lookup_debug
)
783 fprintf_unfiltered (gdb_stdlog
,
784 "cp_lookup_symbol_nonlocal (...) = %s\n",
786 ? host_address_to_string (sym
.symbol
)
792 /* Search through the base classes of PARENT_TYPE for a base class
793 named NAME and return its type. If not found, return NULL. */
796 cp_find_type_baseclass_by_name (struct type
*parent_type
, const char *name
)
800 parent_type
= check_typedef (parent_type
);
801 for (i
= 0; i
< TYPE_N_BASECLASSES (parent_type
); ++i
)
803 struct type
*type
= check_typedef (TYPE_BASECLASS (parent_type
, i
));
804 const char *base_name
= TYPE_BASECLASS_NAME (parent_type
, i
);
806 if (base_name
== NULL
)
809 if (streq (base_name
, name
))
812 type
= cp_find_type_baseclass_by_name (type
, name
);
820 /* Search through the base classes of PARENT_TYPE for a symbol named
821 NAME in block BLOCK. */
823 static struct block_symbol
824 find_symbol_in_baseclass (struct type
*parent_type
, const char *name
,
825 const struct block
*block
, const domain_enum domain
,
829 struct block_symbol sym
;
830 struct cleanup
*cleanup
;
831 char *concatenated_name
;
835 concatenated_name
= NULL
;
836 cleanup
= make_cleanup (free_current_contents
, &concatenated_name
);
838 for (i
= 0; i
< TYPE_N_BASECLASSES (parent_type
); ++i
)
841 struct type
*base_type
= TYPE_BASECLASS (parent_type
, i
);
842 const char *base_name
= TYPE_BASECLASS_NAME (parent_type
, i
);
844 if (base_name
== NULL
)
847 len
= strlen (base_name
) + 2 + strlen (name
) + 1;
848 concatenated_name
= (char *) xrealloc (concatenated_name
, len
);
849 xsnprintf (concatenated_name
, len
, "%s::%s", base_name
, name
);
851 sym
= cp_lookup_nested_symbol_1 (base_type
, name
, concatenated_name
,
852 block
, domain
, 1, is_in_anonymous
);
853 if (sym
.symbol
!= NULL
)
857 do_cleanups (cleanup
);
861 /* Helper function to look up NESTED_NAME in CONTAINER_TYPE and in DOMAIN
862 and within the context of BLOCK.
863 NESTED_NAME may have scope ("::").
864 CONTAINER_TYPE needn't have been "check_typedef'd" yet.
865 CONCATENATED_NAME is the fully scoped spelling of NESTED_NAME, it is
866 passed as an argument so that callers can control how space for it is
868 If BASIC_LOOKUP is non-zero then perform a basic lookup of
869 CONCATENATED_NAME. See cp_basic_lookup_symbol for details.
870 If IS_IN_ANONYMOUS is non-zero then CONCATENATED_NAME is in an anonymous
873 static struct block_symbol
874 cp_lookup_nested_symbol_1 (struct type
*container_type
,
875 const char *nested_name
,
876 const char *concatenated_name
,
877 const struct block
*block
,
878 const domain_enum domain
,
879 int basic_lookup
, int is_in_anonymous
)
881 struct block_symbol sym
;
883 /* NOTE: carlton/2003-11-10: We don't treat C++ class members
884 of classes like, say, data or function members. Instead,
885 they're just represented by symbols whose names are
886 qualified by the name of the surrounding class. This is
887 just like members of namespaces; in particular,
888 cp_basic_lookup_symbol works when looking them up. */
892 sym
= cp_basic_lookup_symbol (concatenated_name
, block
, domain
,
894 if (sym
.symbol
!= NULL
)
898 /* Now search all static file-level symbols. We have to do this for things
899 like typedefs in the class. We do not try to guess any imported
900 namespace as even the fully specified namespace search is already not
901 C++ compliant and more assumptions could make it too magic. */
903 /* First search in this symtab, what we want is possibly there. */
904 sym
= lookup_symbol_in_static_block (concatenated_name
, block
, domain
);
905 if (sym
.symbol
!= NULL
)
908 /* Nope. We now have to search all static blocks in all objfiles,
909 even if block != NULL, because there's no guarantees as to which
910 symtab the symbol we want is in. Except for symbols defined in
911 anonymous namespaces should be treated as local to a single file,
912 which we just searched. */
913 if (!is_in_anonymous
)
915 sym
= lookup_static_symbol (concatenated_name
, domain
);
916 if (sym
.symbol
!= NULL
)
920 /* If this is a class with baseclasses, search them next. */
921 container_type
= check_typedef (container_type
);
922 if (TYPE_N_BASECLASSES (container_type
) > 0)
924 sym
= find_symbol_in_baseclass (container_type
, nested_name
, block
,
925 domain
, is_in_anonymous
);
926 if (sym
.symbol
!= NULL
)
930 return null_block_symbol
;
933 /* Look up a symbol named NESTED_NAME that is nested inside the C++
934 class or namespace given by PARENT_TYPE, from within the context
935 given by BLOCK, and in DOMAIN.
936 Return NULL if there is no such nested symbol. */
939 cp_lookup_nested_symbol (struct type
*parent_type
,
940 const char *nested_name
,
941 const struct block
*block
,
942 const domain_enum domain
)
944 /* type_name_no_tag_or_error provides better error reporting using the
946 struct type
*saved_parent_type
= parent_type
;
948 parent_type
= check_typedef (parent_type
);
950 if (symbol_lookup_debug
)
952 const char *type_name
= type_name_no_tag (saved_parent_type
);
954 fprintf_unfiltered (gdb_stdlog
,
955 "cp_lookup_nested_symbol (%s, %s, %s, %s)\n",
956 type_name
!= NULL
? type_name
: "unnamed",
957 nested_name
, host_address_to_string (block
),
958 domain_name (domain
));
961 switch (TYPE_CODE (parent_type
))
963 case TYPE_CODE_STRUCT
:
964 case TYPE_CODE_NAMESPACE
:
965 case TYPE_CODE_UNION
:
967 /* NOTE: Handle modules here as well, because Fortran is re-using the C++
968 specific code to lookup nested symbols in modules, by calling the
969 function pointer la_lookup_symbol_nonlocal, which ends up here. */
970 case TYPE_CODE_MODULE
:
973 const char *parent_name
= type_name_no_tag_or_error (saved_parent_type
);
974 struct block_symbol sym
;
975 char *concatenated_name
;
978 size
= strlen (parent_name
) + 2 + strlen (nested_name
) + 1;
979 concatenated_name
= (char *) alloca (size
);
980 xsnprintf (concatenated_name
, size
, "%s::%s",
981 parent_name
, nested_name
);
982 is_in_anonymous
= cp_is_in_anonymous (concatenated_name
);
984 sym
= cp_lookup_nested_symbol_1 (parent_type
, nested_name
,
985 concatenated_name
, block
, domain
,
988 if (symbol_lookup_debug
)
990 fprintf_unfiltered (gdb_stdlog
,
991 "cp_lookup_nested_symbol (...) = %s\n",
993 ? host_address_to_string (sym
.symbol
)
1000 case TYPE_CODE_METHOD
:
1001 if (symbol_lookup_debug
)
1003 fprintf_unfiltered (gdb_stdlog
,
1004 "cp_lookup_nested_symbol (...) = NULL"
1005 " (func/method)\n");
1007 return null_block_symbol
;
1010 internal_error (__FILE__
, __LINE__
,
1011 _("cp_lookup_nested_symbol called "
1012 "on a non-aggregate type."));
1016 /* The C++-version of lookup_transparent_type. */
1018 /* FIXME: carlton/2004-01-16: The problem that this is trying to
1019 address is that, unfortunately, sometimes NAME is wrong: it may not
1020 include the name of namespaces enclosing the type in question.
1021 lookup_transparent_type gets called when the type in question
1022 is a declaration, and we're trying to find its definition; but, for
1023 declarations, our type name deduction mechanism doesn't work.
1024 There's nothing we can do to fix this in general, I think, in the
1025 absence of debug information about namespaces (I've filed PR
1026 gdb/1511 about this); until such debug information becomes more
1027 prevalent, one heuristic which sometimes looks is to search for the
1028 definition in namespaces containing the current namespace.
1030 We should delete this functions once the appropriate debug
1031 information becomes more widespread. (GCC 3.4 will be the first
1032 released version of GCC with such information.) */
1035 cp_lookup_transparent_type (const char *name
)
1037 /* First, try the honest way of looking up the definition. */
1038 struct type
*t
= basic_lookup_transparent_type (name
);
1044 /* If that doesn't work and we're within a namespace, look there
1046 scope
= block_scope (get_selected_block (0));
1048 if (scope
[0] == '\0')
1051 return cp_lookup_transparent_type_loop (name
, scope
, 0);
1054 /* Lookup the type definition associated to NAME in namespaces/classes
1055 containing SCOPE whose name is strictly longer than LENGTH. LENGTH
1056 must be the index of the start of a component of SCOPE. */
1058 static struct type
*
1059 cp_lookup_transparent_type_loop (const char *name
,
1063 int scope_length
= length
+ cp_find_first_component (scope
+ length
);
1066 /* If the current scope is followed by "::", look in the next
1068 if (scope
[scope_length
] == ':')
1071 = cp_lookup_transparent_type_loop (name
, scope
,
1078 full_name
= (char *) alloca (scope_length
+ 2 + strlen (name
) + 1);
1079 strncpy (full_name
, scope
, scope_length
);
1080 strncpy (full_name
+ scope_length
, "::", 2);
1081 strcpy (full_name
+ scope_length
+ 2, name
);
1083 return basic_lookup_transparent_type (full_name
);
1086 /* This used to do something but was removed when it became
1090 maintenance_cplus_namespace (char *args
, int from_tty
)
1092 printf_unfiltered (_("The `maint namespace' command was removed.\n"));
1095 /* Provide a prototype to silence -Wmissing-prototypes. */
1096 extern initialize_file_ftype _initialize_cp_namespace
;
1099 _initialize_cp_namespace (void)
1101 struct cmd_list_element
*cmd
;
1103 cmd
= add_cmd ("namespace", class_maintenance
,
1104 maintenance_cplus_namespace
,
1105 _("Deprecated placeholder for removed functionality."),
1106 &maint_cplus_cmd_list
);
1107 deprecate_cmd (cmd
, NULL
);