1 /* Helper routines for C++ support in GDB.
2 Copyright (C) 2003-2014 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"
35 static struct symbol
*
36 cp_lookup_nested_symbol_1 (struct type
*container_type
,
37 const char *nested_name
,
38 const char *concatenated_name
,
39 const struct block
*block
,
42 static struct type
*cp_lookup_transparent_type_loop (const char *name
,
46 /* Check to see if SYMBOL refers to an object contained within an
47 anonymous namespace; if so, add an appropriate using directive. */
50 cp_scan_for_anonymous_namespaces (const struct symbol
*const symbol
,
51 struct objfile
*const objfile
)
53 if (SYMBOL_DEMANGLED_NAME (symbol
) != NULL
)
55 const char *name
= SYMBOL_DEMANGLED_NAME (symbol
);
56 unsigned int previous_component
;
57 unsigned int next_component
;
59 /* Start with a quick-and-dirty check for mention of "(anonymous
62 if (!cp_is_in_anonymous (name
))
65 previous_component
= 0;
66 next_component
= cp_find_first_component (name
+ previous_component
);
68 while (name
[next_component
] == ':')
70 if (((next_component
- previous_component
)
71 == CP_ANONYMOUS_NAMESPACE_LEN
)
72 && strncmp (name
+ previous_component
,
73 CP_ANONYMOUS_NAMESPACE_STR
,
74 CP_ANONYMOUS_NAMESPACE_LEN
) == 0)
76 int dest_len
= (previous_component
== 0
77 ? 0 : previous_component
- 2);
78 int src_len
= next_component
;
80 char *dest
= alloca (dest_len
+ 1);
81 char *src
= alloca (src_len
+ 1);
83 memcpy (dest
, name
, dest_len
);
84 memcpy (src
, name
, src_len
);
86 dest
[dest_len
] = '\0';
89 /* We've found a component of the name that's an
90 anonymous namespace. So add symbols in it to the
91 namespace given by the previous component if there is
92 one, or to the global namespace if there isn't. */
93 cp_add_using_directive (dest
, src
, NULL
, NULL
, NULL
, 1,
94 &objfile
->objfile_obstack
);
96 /* The "+ 2" is for the "::". */
97 previous_component
= next_component
+ 2;
98 next_component
= (previous_component
99 + cp_find_first_component (name
100 + previous_component
));
105 /* Add a using directive to using_directives. If the using directive
106 in question has already been added, don't add it twice.
108 Create a new struct using_direct which imports the namespace SRC
109 into the scope DEST. ALIAS is the name of the imported namespace
110 in the current scope. If ALIAS is NULL then the namespace is known
111 by its original name. DECLARATION is the name if the imported
112 varable if this is a declaration import (Eg. using A::x), otherwise
113 it is NULL. EXCLUDES is a list of names not to import from an
114 imported module or NULL. If COPY_NAMES is non-zero, then the
115 arguments are copied into newly allocated memory so they can be
116 temporaries. For EXCLUDES the VEC pointers are copied but the
117 pointed to characters are not copied. */
120 cp_add_using_directive (const char *dest
,
123 const char *declaration
,
124 VEC (const_char_ptr
) *excludes
,
126 struct obstack
*obstack
)
128 struct using_direct
*current
;
129 struct using_direct
*new;
131 /* Has it already been added? */
133 for (current
= using_directives
; current
!= NULL
; current
= current
->next
)
138 if (strcmp (current
->import_src
, src
) != 0)
140 if (strcmp (current
->import_dest
, dest
) != 0)
142 if ((alias
== NULL
&& current
->alias
!= NULL
)
143 || (alias
!= NULL
&& current
->alias
== NULL
)
144 || (alias
!= NULL
&& current
->alias
!= NULL
145 && strcmp (alias
, current
->alias
) != 0))
147 if ((declaration
== NULL
&& current
->declaration
!= NULL
)
148 || (declaration
!= NULL
&& current
->declaration
== NULL
)
149 || (declaration
!= NULL
&& current
->declaration
!= NULL
150 && strcmp (declaration
, current
->declaration
) != 0))
153 /* Compare the contents of EXCLUDES. */
154 for (ix
= 0; VEC_iterate (const_char_ptr
, excludes
, ix
, param
); ix
++)
155 if (current
->excludes
[ix
] == NULL
156 || strcmp (param
, current
->excludes
[ix
]) != 0)
158 if (ix
< VEC_length (const_char_ptr
, excludes
)
159 || current
->excludes
[ix
] != NULL
)
162 /* Parameters exactly match CURRENT. */
166 new = obstack_alloc (obstack
, (sizeof (*new)
167 + (VEC_length (const_char_ptr
, excludes
)
168 * sizeof (*new->excludes
))));
169 memset (new, 0, sizeof (*new));
173 new->import_src
= obstack_copy0 (obstack
, src
, strlen (src
));
174 new->import_dest
= obstack_copy0 (obstack
, dest
, strlen (dest
));
178 new->import_src
= src
;
179 new->import_dest
= dest
;
182 if (alias
!= NULL
&& copy_names
)
183 new->alias
= obstack_copy0 (obstack
, alias
, strlen (alias
));
187 if (declaration
!= NULL
&& copy_names
)
188 new->declaration
= obstack_copy0 (obstack
,
189 declaration
, strlen (declaration
));
191 new->declaration
= declaration
;
193 memcpy (new->excludes
, VEC_address (const_char_ptr
, excludes
),
194 VEC_length (const_char_ptr
, excludes
) * sizeof (*new->excludes
));
195 new->excludes
[VEC_length (const_char_ptr
, excludes
)] = NULL
;
197 new->next
= using_directives
;
198 using_directives
= new;
201 /* Test whether or not NAMESPACE looks like it mentions an anonymous
202 namespace; return nonzero if so. */
205 cp_is_in_anonymous (const char *symbol_name
)
207 return (strstr (symbol_name
, CP_ANONYMOUS_NAMESPACE_STR
)
211 /* Look up NAME in DOMAIN in BLOCK's static block and in global blocks.
212 If ANONYMOUS_NAMESPACE is nonzero, the symbol in question is located
213 within an anonymous namespace. */
215 static struct symbol
*
216 cp_basic_lookup_symbol (const char *name
, const struct block
*block
,
217 const domain_enum domain
, int anonymous_namespace
)
221 sym
= lookup_symbol_in_static_block (name
, block
, domain
);
225 if (anonymous_namespace
)
227 /* Symbols defined in anonymous namespaces have external linkage
228 but should be treated as local to a single file nonetheless.
229 So we only search the current file's global block. */
231 const struct block
*global_block
= block_global_block (block
);
233 if (global_block
!= NULL
)
234 sym
= lookup_symbol_in_block (name
, global_block
, domain
);
238 sym
= lookup_global_symbol (name
, block
, domain
);
244 /* Search bare symbol NAME in DOMAIN in BLOCK.
245 NAME is guaranteed to not have any scope (no "::").
246 If SEARCH is non-zero then see if we can determine "this" from BLOCK, and
247 if so then also search for NAME in that class. */
249 static struct symbol
*
250 cp_lookup_bare_symbol (const char *name
, const struct block
*block
,
251 const domain_enum domain
, int search
)
255 /* Note: We can't do a simple assert for ':' not being in NAME because
256 ':' may be in the args of a template spec. This isn't intended to be
257 a complete test, just cheap and documentary. */
258 if (strchr (name
, '<') == NULL
&& strchr (name
, '(') == NULL
)
259 gdb_assert (strchr (name
, ':') == NULL
);
261 sym
= lookup_symbol_in_static_block (name
, block
, domain
);
265 sym
= lookup_global_symbol (name
, block
, domain
);
274 this = lookup_language_this (language_def (language_cplus
), block
);
278 type
= check_typedef (TYPE_TARGET_TYPE (SYMBOL_TYPE (this)));
279 /* If TYPE_NAME is NULL, abandon trying to find this symbol.
280 This can happen for lambda functions compiled with clang++,
281 which outputs no name for the container class. */
282 if (TYPE_NAME (type
) == NULL
)
285 /* Look for a symbol named NESTED in this class. */
286 sym
= cp_lookup_nested_symbol (type
, name
, block
);
292 /* Search NAME in DOMAIN in all static blocks, and then in all baseclasses.
293 BLOCK specifies the context in which to perform the search.
294 NAME is guaranteed to have scope (contain "::") and PREFIX_LEN specifies
295 then length the entire scope of NAME (up to, but not including, the last
298 Note: At least in the case of Fortran, which also uses this code, there
299 may be no text after the last "::". */
301 static struct symbol
*
302 cp_search_static_and_baseclasses (const char *name
,
303 const struct block
*block
,
304 const domain_enum domain
,
305 unsigned int prefix_len
)
308 char *klass
, *nested
;
309 struct cleanup
*cleanup
;
310 struct symbol
*klass_sym
;
311 struct type
*klass_type
;
313 /* The test here uses <= instead of < because Fortran also uses this,
314 and the module.exp testcase will pass "modmany::" for NAME here. */
315 gdb_assert (prefix_len
+ 2 <= strlen (name
));
316 gdb_assert (name
[prefix_len
+ 1] == ':');
318 /* Find the name of the class and the name of the method, variable, etc. */
320 /* The class name is everything up to and including PREFIX_LEN. */
321 klass
= savestring (name
, prefix_len
);
323 /* The rest of the name is everything else past the initial scope
325 nested
= xstrdup (name
+ prefix_len
+ 2);
327 /* Add cleanups to free memory for these strings. */
328 cleanup
= make_cleanup (xfree
, klass
);
329 make_cleanup (xfree
, nested
);
331 /* Lookup a class named KLASS. If none is found, there is nothing
332 more that can be done. */
333 klass_sym
= lookup_global_symbol (klass
, block
, domain
);
334 if (klass_sym
== NULL
)
336 do_cleanups (cleanup
);
339 klass_type
= SYMBOL_TYPE (klass_sym
);
341 /* Look for a symbol named NESTED in this class.
342 The caller is assumed to have already have done a basic lookup of NAME.
343 So we pass zero for BASIC_LOOKUP to cp_lookup_nested_symbol_1 here. */
344 sym
= cp_lookup_nested_symbol_1 (klass_type
, nested
, name
, block
, 0);
346 do_cleanups (cleanup
);
350 /* Look up NAME in the C++ namespace NAMESPACE. Other arguments are
351 as in cp_lookup_symbol_nonlocal. If SEARCH is non-zero, search
352 through base classes for a matching symbol.
354 Note: Part of the complexity is because NAME may itself specify scope.
355 Part of the complexity is also because this handles the case where
356 there is no scoping in which case we also try looking in the class of
357 "this" if we can compute it. */
359 static struct symbol
*
360 cp_lookup_symbol_in_namespace (const char *namespace, const char *name
,
361 const struct block
*block
,
362 const domain_enum domain
, int search
)
364 char *concatenated_name
= NULL
;
366 unsigned int prefix_len
;
369 if (namespace[0] != '\0')
371 concatenated_name
= alloca (strlen (namespace) + 2
372 + strlen (name
) + 1);
373 strcpy (concatenated_name
, namespace);
374 strcat (concatenated_name
, "::");
375 strcat (concatenated_name
, name
);
376 name
= concatenated_name
;
379 prefix_len
= cp_entire_prefix_len (name
);
381 return cp_lookup_bare_symbol (name
, block
, domain
, search
);
383 /* This would be simpler if we just called cp_lookup_nested_symbol
384 at this point. But that would require first looking up the containing
385 class/namespace. Since we're only searching static and global blocks
386 there's often no need to first do that lookup. */
388 is_in_anonymous
= namespace[0] != '\0' && cp_is_in_anonymous (namespace);
389 sym
= cp_basic_lookup_symbol (name
, block
, domain
, is_in_anonymous
);
394 sym
= cp_search_static_and_baseclasses (name
, block
, domain
, prefix_len
);
399 /* Used for cleanups to reset the "searched" flag incase
403 reset_directive_searched (void *data
)
405 struct using_direct
*direct
= data
;
406 direct
->searched
= 0;
409 /* Search for NAME by applying all import statements belonging to
410 BLOCK which are applicable in SCOPE. If DECLARATION_ONLY the
411 search is restricted to using declarations.
419 If SEARCH_PARENTS the search will include imports which are
420 applicable in parents of SCOPE.
430 If SCOPE is "A::B" and SEARCH_PARENTS is true the imports of
431 namespaces X and Y will be considered. If SEARCH_PARENTS is false
432 only the import of Y is considered. */
434 static struct symbol
*
435 cp_lookup_symbol_via_imports (const char *scope
,
437 const struct block
*block
,
438 const domain_enum domain
,
439 const int declaration_only
,
440 const int search_parents
)
442 struct using_direct
*current
;
443 struct symbol
*sym
= NULL
;
446 struct cleanup
*searched_cleanup
;
448 /* First, try to find the symbol in the given namespace. */
449 if (!declaration_only
)
450 sym
= cp_lookup_symbol_in_namespace (scope
, name
,
456 /* Go through the using directives. If any of them add new names to
457 the namespace we're searching in, see if we can find a match by
460 for (current
= block_using (block
);
462 current
= current
->next
)
464 const char **excludep
;
466 len
= strlen (current
->import_dest
);
467 directive_match
= (search_parents
468 ? (strncmp (scope
, current
->import_dest
,
469 strlen (current
->import_dest
)) == 0
472 || scope
[len
] == '\0'))
473 : strcmp (scope
, current
->import_dest
) == 0);
475 /* If the import destination is the current scope or one of its
476 ancestors then it is applicable. */
477 if (directive_match
&& !current
->searched
)
479 /* Mark this import as searched so that the recursive call
480 does not search it again. */
481 current
->searched
= 1;
482 searched_cleanup
= make_cleanup (reset_directive_searched
,
485 /* If there is an import of a single declaration, compare the
486 imported declaration (after optional renaming by its alias)
487 with the sought out name. If there is a match pass
488 current->import_src as NAMESPACE to direct the search
489 towards the imported namespace. */
490 if (current
->declaration
491 && strcmp (name
, current
->alias
492 ? current
->alias
: current
->declaration
) == 0)
493 sym
= cp_lookup_symbol_in_namespace (current
->import_src
,
494 current
->declaration
,
497 /* If this is a DECLARATION_ONLY search or a symbol was found
498 or this import statement was an import declaration, the
499 search of this import is complete. */
500 if (declaration_only
|| sym
!= NULL
|| current
->declaration
)
502 current
->searched
= 0;
503 discard_cleanups (searched_cleanup
);
511 /* Do not follow CURRENT if NAME matches its EXCLUDES. */
512 for (excludep
= current
->excludes
; *excludep
; excludep
++)
513 if (strcmp (name
, *excludep
) == 0)
517 discard_cleanups (searched_cleanup
);
521 if (current
->alias
!= NULL
522 && strcmp (name
, current
->alias
) == 0)
523 /* If the import is creating an alias and the alias matches
524 the sought name. Pass current->import_src as the NAME to
525 direct the search towards the aliased namespace. */
527 sym
= cp_lookup_symbol_in_namespace (scope
,
531 else if (current
->alias
== NULL
)
533 /* If this import statement creates no alias, pass
534 current->inner as NAMESPACE to direct the search
535 towards the imported namespace. */
536 sym
= cp_lookup_symbol_via_imports (current
->import_src
,
540 current
->searched
= 0;
541 discard_cleanups (searched_cleanup
);
551 /* Helper function that searches an array of symbols for one named
554 static struct symbol
*
555 search_symbol_list (const char *name
, int num
,
556 struct symbol
**syms
)
560 /* Maybe we should store a dictionary in here instead. */
561 for (i
= 0; i
< num
; ++i
)
563 if (strcmp (name
, SYMBOL_NATURAL_NAME (syms
[i
])) == 0)
569 /* Like cp_lookup_symbol_via_imports, but if BLOCK is a function, it
570 searches through the template parameters of the function and the
574 cp_lookup_symbol_imports_or_template (const char *scope
,
576 const struct block
*block
,
577 const domain_enum domain
)
579 struct symbol
*function
= BLOCK_FUNCTION (block
);
580 struct symbol
*result
;
582 if (symbol_lookup_debug
)
584 fprintf_unfiltered (gdb_stdlog
,
585 "cp_lookup_symbol_imports_or_template"
586 " (%s, %s, %s, %s)\n",
587 scope
, name
, host_address_to_string (block
),
588 domain_name (domain
));
591 if (function
!= NULL
&& SYMBOL_LANGUAGE (function
) == language_cplus
)
593 /* Search the function's template parameters. */
594 if (SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION (function
))
596 struct template_symbol
*templ
597 = (struct template_symbol
*) function
;
599 result
= search_symbol_list (name
,
600 templ
->n_template_arguments
,
601 templ
->template_arguments
);
604 if (symbol_lookup_debug
)
606 fprintf_unfiltered (gdb_stdlog
,
607 "cp_lookup_symbol_imports_or_template"
609 host_address_to_string (result
));
615 /* Search the template parameters of the function's defining
617 if (SYMBOL_NATURAL_NAME (function
))
619 struct type
*context
;
620 char *name_copy
= xstrdup (SYMBOL_NATURAL_NAME (function
));
621 struct cleanup
*cleanups
= make_cleanup (xfree
, name_copy
);
622 const struct language_defn
*lang
= language_def (language_cplus
);
624 = get_objfile_arch (SYMBOL_OBJFILE (function
));
625 const struct block
*parent
= BLOCK_SUPERBLOCK (block
);
629 unsigned int prefix_len
= cp_entire_prefix_len (name_copy
);
635 name_copy
[prefix_len
] = '\0';
636 context
= lookup_typename (lang
, arch
,
645 = search_symbol_list (name
,
646 TYPE_N_TEMPLATE_ARGUMENTS (context
),
647 TYPE_TEMPLATE_ARGUMENTS (context
));
650 do_cleanups (cleanups
);
651 if (symbol_lookup_debug
)
653 fprintf_unfiltered (gdb_stdlog
,
654 "cp_lookup_symbol_imports_or_template"
656 host_address_to_string (result
));
662 do_cleanups (cleanups
);
666 result
= cp_lookup_symbol_via_imports (scope
, name
, block
, domain
, 1, 1);
667 if (symbol_lookup_debug
)
669 fprintf_unfiltered (gdb_stdlog
,
670 "cp_lookup_symbol_imports_or_template (...) = %s\n",
672 ? host_address_to_string (result
) : "NULL");
677 /* Searches for NAME in the current namespace, and by applying
678 relevant import statements belonging to BLOCK and its parents.
679 SCOPE is the namespace scope of the context in which the search is
683 cp_lookup_symbol_namespace (const char *scope
,
685 const struct block
*block
,
686 const domain_enum domain
)
690 if (symbol_lookup_debug
)
692 fprintf_unfiltered (gdb_stdlog
,
693 "cp_lookup_symbol_namespace (%s, %s, %s, %s)\n",
694 scope
, name
, host_address_to_string (block
),
695 domain_name (domain
));
698 /* First, try to find the symbol in the given namespace. */
699 sym
= cp_lookup_symbol_in_namespace (scope
, name
,
703 if (symbol_lookup_debug
)
705 fprintf_unfiltered (gdb_stdlog
,
706 "cp_lookup_symbol_namespace (...) = %s\n",
707 host_address_to_string (sym
));
712 /* Search for name in namespaces imported to this and parent
714 while (block
!= NULL
)
716 sym
= cp_lookup_symbol_via_imports (scope
, name
, block
,
721 if (symbol_lookup_debug
)
723 fprintf_unfiltered (gdb_stdlog
,
724 "cp_lookup_symbol_namespace (...) = %s\n",
725 host_address_to_string (sym
));
730 block
= BLOCK_SUPERBLOCK (block
);
733 if (symbol_lookup_debug
)
735 fprintf_unfiltered (gdb_stdlog
,
736 "cp_lookup_symbol_namespace (...) = NULL\n");
741 /* Lookup NAME at namespace scope (or, in C terms, in static and
742 global variables). SCOPE is the namespace that the current
743 function is defined within; only consider namespaces whose length
744 is at least SCOPE_LEN. Other arguments are as in
745 cp_lookup_symbol_nonlocal.
747 For example, if we're within a function A::B::f and looking for a
748 symbol x, this will get called with NAME = "x", SCOPE = "A::B", and
749 SCOPE_LEN = 0. It then calls itself with NAME and SCOPE the same,
750 but with SCOPE_LEN = 1. And then it calls itself with NAME and
751 SCOPE the same, but with SCOPE_LEN = 4. This third call looks for
752 "A::B::x"; if it doesn't find it, then the second call looks for
753 "A::x", and if that call fails, then the first call looks for
756 static struct symbol
*
757 lookup_namespace_scope (const char *name
,
758 const struct block
*block
,
759 const domain_enum domain
,
765 if (scope
[scope_len
] != '\0')
767 /* Recursively search for names in child namespaces first. */
770 int new_scope_len
= scope_len
;
772 /* If the current scope is followed by "::", skip past that. */
773 if (new_scope_len
!= 0)
775 gdb_assert (scope
[new_scope_len
] == ':');
778 new_scope_len
+= cp_find_first_component (scope
+ new_scope_len
);
779 sym
= lookup_namespace_scope (name
, block
, domain
,
780 scope
, new_scope_len
);
785 /* Okay, we didn't find a match in our children, so look for the
786 name in the current namespace. */
788 namespace = alloca (scope_len
+ 1);
789 strncpy (namespace, scope
, scope_len
);
790 namespace[scope_len
] = '\0';
791 return cp_lookup_symbol_in_namespace (namespace, name
,
795 /* The C++-specific version of name lookup for static and global
796 names. This makes sure that names get looked for in all namespaces
797 that are in scope. NAME is the natural name of the symbol that
798 we're looking for, BLOCK is the block that we're searching within,
799 DOMAIN says what kind of symbols we're looking for. */
802 cp_lookup_symbol_nonlocal (const char *name
,
803 const struct block
*block
,
804 const domain_enum domain
)
807 const char *scope
= block_scope (block
);
809 if (symbol_lookup_debug
)
811 fprintf_unfiltered (gdb_stdlog
,
812 "cp_lookup_symbol_non_local"
813 " (%s, %s (scope %s), %s)\n",
814 name
, host_address_to_string (block
), scope
,
815 domain_name (domain
));
818 sym
= lookup_namespace_scope (name
, block
, domain
, scope
, 0);
821 if (symbol_lookup_debug
)
823 fprintf_unfiltered (gdb_stdlog
,
824 "cp_lookup_symbol_nonlocal (...) = %s\n",
825 host_address_to_string (sym
));
830 sym
= cp_lookup_symbol_namespace (scope
, name
, block
, domain
);
831 if (symbol_lookup_debug
)
833 fprintf_unfiltered (gdb_stdlog
,
834 "cp_lookup_symbol_nonlocal (...) = %s\n",
835 sym
!= NULL
? host_address_to_string (sym
) : "NULL");
840 /* Search through the base classes of PARENT_TYPE for a base class
841 named NAME and return its type. If not found, return NULL. */
844 cp_find_type_baseclass_by_name (struct type
*parent_type
, const char *name
)
848 CHECK_TYPEDEF (parent_type
);
849 for (i
= 0; i
< TYPE_N_BASECLASSES (parent_type
); ++i
)
851 struct type
*type
= check_typedef (TYPE_BASECLASS (parent_type
, i
));
852 const char *base_name
= TYPE_BASECLASS_NAME (parent_type
, i
);
854 if (base_name
== NULL
)
857 if (streq (base_name
, name
))
860 type
= cp_find_type_baseclass_by_name (type
, name
);
868 /* Search through the base classes of PARENT_TYPE for a symbol named
869 NAME in block BLOCK. */
871 static struct symbol
*
872 find_symbol_in_baseclass (struct type
*parent_type
, const char *name
,
873 const struct block
*block
)
877 struct cleanup
*cleanup
;
878 char *concatenated_name
;
881 concatenated_name
= NULL
;
882 cleanup
= make_cleanup (free_current_contents
, &concatenated_name
);
884 for (i
= 0; i
< TYPE_N_BASECLASSES (parent_type
); ++i
)
887 struct type
*base_type
= TYPE_BASECLASS (parent_type
, i
);
888 const char *base_name
= TYPE_BASECLASS_NAME (parent_type
, i
);
890 if (base_name
== NULL
)
893 len
= strlen (base_name
) + 2 + strlen (name
) + 1;
894 concatenated_name
= xrealloc (concatenated_name
, len
);
895 xsnprintf (concatenated_name
, len
, "%s::%s", base_name
, name
);
897 sym
= cp_lookup_nested_symbol_1 (base_type
, name
, concatenated_name
,
903 do_cleanups (cleanup
);
907 /* Helper function to look up NESTED_NAME in CONTAINER_TYPE within the
909 CONTAINER_TYPE needn't have been "check_typedef'd" yet.
910 CONCATENATED_NAME is the fully scoped spelling of NESTED_NAME, it is
911 passed as an argument so that callers can control how space for it is
913 If BASIC_LOOKUP is non-zero then perform a basic lookup of
914 CONCATENATED_NAME. See cp_basic_lookup_symbol for details. */
916 static struct symbol
*
917 cp_lookup_nested_symbol_1 (struct type
*container_type
,
918 const char *nested_name
,
919 const char *concatenated_name
,
920 const struct block
*block
,
923 int is_in_anonymous
= cp_is_in_anonymous (concatenated_name
);
926 /* NOTE: carlton/2003-11-10: We don't treat C++ class members
927 of classes like, say, data or function members. Instead,
928 they're just represented by symbols whose names are
929 qualified by the name of the surrounding class. This is
930 just like members of namespaces; in particular,
931 cp_basic_lookup_symbol works when looking them up. */
935 sym
= cp_basic_lookup_symbol (concatenated_name
, block
, VAR_DOMAIN
,
941 /* Now search all static file-level symbols. We have to do this for things
942 like typedefs in the class. We do not try to guess any imported
943 namespace as even the fully specified namespace search is already not
944 C++ compliant and more assumptions could make it too magic. */
946 /* First search in this symtab, what we want is possibly there. */
947 sym
= lookup_symbol_in_static_block (concatenated_name
, block
, VAR_DOMAIN
);
951 /* Nope. We now have to search all static blocks in all objfiles,
952 even if block != NULL, because there's no guarantees as to which
953 symtab the symbol we want is in. */
954 sym
= lookup_static_symbol (concatenated_name
, VAR_DOMAIN
);
958 /* If this is a class with baseclasses, search them next. */
959 CHECK_TYPEDEF (container_type
);
960 if (TYPE_N_BASECLASSES (container_type
) > 0)
962 sym
= find_symbol_in_baseclass (container_type
, nested_name
, block
);
970 /* Look up a symbol named NESTED_NAME that is nested inside the C++
971 class or namespace given by PARENT_TYPE, from within the context
972 given by BLOCK. Return NULL if there is no such nested symbol. */
975 cp_lookup_nested_symbol (struct type
*parent_type
,
976 const char *nested_name
,
977 const struct block
*block
)
979 /* type_name_no_tag_or_error provides better error reporting using the
981 struct type
*saved_parent_type
= parent_type
;
983 CHECK_TYPEDEF (parent_type
);
985 if (symbol_lookup_debug
)
987 const char *type_name
= type_name_no_tag (saved_parent_type
);
989 fprintf_unfiltered (gdb_stdlog
,
990 "cp_lookup_nested_symbol (%s, %s, %s)\n",
991 type_name
!= NULL
? type_name
: "unnamed",
992 nested_name
, host_address_to_string (block
));
995 switch (TYPE_CODE (parent_type
))
997 case TYPE_CODE_STRUCT
:
998 case TYPE_CODE_NAMESPACE
:
999 case TYPE_CODE_UNION
:
1000 case TYPE_CODE_ENUM
:
1001 /* NOTE: Handle modules here as well, because Fortran is re-using the C++
1002 specific code to lookup nested symbols in modules, by calling the
1003 function pointer la_lookup_symbol_nonlocal, which ends up here. */
1004 case TYPE_CODE_MODULE
:
1007 const char *parent_name
= type_name_no_tag_or_error (saved_parent_type
);
1009 char *concatenated_name
;
1011 size
= strlen (parent_name
) + 2 + strlen (nested_name
) + 1;
1012 concatenated_name
= alloca (size
);
1013 xsnprintf (concatenated_name
, size
, "%s::%s",
1014 parent_name
, nested_name
);
1016 sym
= cp_lookup_nested_symbol_1 (parent_type
, nested_name
,
1017 concatenated_name
, block
, 1);
1019 if (symbol_lookup_debug
)
1021 fprintf_unfiltered (gdb_stdlog
,
1022 "cp_lookup_nested_symbol (...) = %s\n",
1024 ? host_address_to_string (sym
) : "NULL");
1029 case TYPE_CODE_FUNC
:
1030 case TYPE_CODE_METHOD
:
1031 if (symbol_lookup_debug
)
1033 fprintf_unfiltered (gdb_stdlog
,
1034 "cp_lookup_nested_symbol (...) = NULL"
1035 " (func/method)\n");
1040 internal_error (__FILE__
, __LINE__
,
1041 _("cp_lookup_nested_symbol called "
1042 "on a non-aggregate type."));
1046 /* The C++-version of lookup_transparent_type. */
1048 /* FIXME: carlton/2004-01-16: The problem that this is trying to
1049 address is that, unfortunately, sometimes NAME is wrong: it may not
1050 include the name of namespaces enclosing the type in question.
1051 lookup_transparent_type gets called when the type in question
1052 is a declaration, and we're trying to find its definition; but, for
1053 declarations, our type name deduction mechanism doesn't work.
1054 There's nothing we can do to fix this in general, I think, in the
1055 absence of debug information about namespaces (I've filed PR
1056 gdb/1511 about this); until such debug information becomes more
1057 prevalent, one heuristic which sometimes looks is to search for the
1058 definition in namespaces containing the current namespace.
1060 We should delete this functions once the appropriate debug
1061 information becomes more widespread. (GCC 3.4 will be the first
1062 released version of GCC with such information.) */
1065 cp_lookup_transparent_type (const char *name
)
1067 /* First, try the honest way of looking up the definition. */
1068 struct type
*t
= basic_lookup_transparent_type (name
);
1074 /* If that doesn't work and we're within a namespace, look there
1076 scope
= block_scope (get_selected_block (0));
1078 if (scope
[0] == '\0')
1081 return cp_lookup_transparent_type_loop (name
, scope
, 0);
1084 /* Lookup the type definition associated to NAME in namespaces/classes
1085 containing SCOPE whose name is strictly longer than LENGTH. LENGTH
1086 must be the index of the start of a component of SCOPE. */
1088 static struct type
*
1089 cp_lookup_transparent_type_loop (const char *name
,
1093 int scope_length
= length
+ cp_find_first_component (scope
+ length
);
1096 /* If the current scope is followed by "::", look in the next
1098 if (scope
[scope_length
] == ':')
1101 = cp_lookup_transparent_type_loop (name
, scope
,
1108 full_name
= alloca (scope_length
+ 2 + strlen (name
) + 1);
1109 strncpy (full_name
, scope
, scope_length
);
1110 strncpy (full_name
+ scope_length
, "::", 2);
1111 strcpy (full_name
+ scope_length
+ 2, name
);
1113 return basic_lookup_transparent_type (full_name
);
1116 /* This used to do something but was removed when it became
1120 maintenance_cplus_namespace (char *args
, int from_tty
)
1122 printf_unfiltered (_("The `maint namespace' command was removed.\n"));
1125 /* Provide a prototype to silence -Wmissing-prototypes. */
1126 extern initialize_file_ftype _initialize_cp_namespace
;
1129 _initialize_cp_namespace (void)
1131 struct cmd_list_element
*cmd
;
1133 cmd
= add_cmd ("namespace", class_maintenance
,
1134 maintenance_cplus_namespace
,
1135 _("Deprecated placeholder for removed functionality."),
1136 &maint_cplus_cmd_list
);
1137 deprecate_cmd (cmd
, NULL
);