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9219021c | 1 | /* Helper routines for C++ support in GDB. |
ecd75fc8 | 2 | Copyright (C) 2003-2014 Free Software Foundation, Inc. |
9219021c | 3 | |
1fcb5155 | 4 | Contributed by David Carlton and by Kealia, Inc. |
9219021c DC |
5 | |
6 | This file is part of GDB. | |
7 | ||
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 | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
9219021c DC |
11 | (at your option) any later version. |
12 | ||
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. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
9219021c DC |
20 | |
21 | #include "defs.h" | |
22 | #include "cp-support.h" | |
23 | #include "gdb_obstack.h" | |
24 | #include "symtab.h" | |
25 | #include "symfile.h" | |
9219021c | 26 | #include "block.h" |
5c4e30ca DC |
27 | #include "objfiles.h" |
28 | #include "gdbtypes.h" | |
29 | #include "dictionary.h" | |
30 | #include "command.h" | |
b368761e | 31 | #include "frame.h" |
27aa8d6a | 32 | #include "buildsym.h" |
34eaf542 | 33 | #include "language.h" |
9219021c | 34 | |
1fcb5155 | 35 | static struct symbol *lookup_namespace_scope (const char *name, |
1fcb5155 DC |
36 | const struct block *block, |
37 | const domain_enum domain, | |
1fcb5155 DC |
38 | const char *scope, |
39 | int scope_len); | |
40 | ||
b368761e DC |
41 | static struct type *cp_lookup_transparent_type_loop (const char *name, |
42 | const char *scope, | |
43 | int scope_len); | |
44 | ||
9219021c DC |
45 | /* Check to see if SYMBOL refers to an object contained within an |
46 | anonymous namespace; if so, add an appropriate using directive. */ | |
47 | ||
9219021c | 48 | void |
a10964d1 AR |
49 | cp_scan_for_anonymous_namespaces (const struct symbol *const symbol, |
50 | struct objfile *const objfile) | |
9219021c | 51 | { |
df8a16a1 | 52 | if (SYMBOL_DEMANGLED_NAME (symbol) != NULL) |
9219021c | 53 | { |
df8a16a1 | 54 | const char *name = SYMBOL_DEMANGLED_NAME (symbol); |
9219021c DC |
55 | unsigned int previous_component; |
56 | unsigned int next_component; | |
9219021c DC |
57 | |
58 | /* Start with a quick-and-dirty check for mention of "(anonymous | |
59 | namespace)". */ | |
60 | ||
61 | if (!cp_is_anonymous (name)) | |
62 | return; | |
63 | ||
64 | previous_component = 0; | |
65 | next_component = cp_find_first_component (name + previous_component); | |
66 | ||
67 | while (name[next_component] == ':') | |
68 | { | |
2b1dbab0 KS |
69 | if (((next_component - previous_component) |
70 | == CP_ANONYMOUS_NAMESPACE_LEN) | |
9219021c | 71 | && strncmp (name + previous_component, |
2b1dbab0 KS |
72 | CP_ANONYMOUS_NAMESPACE_STR, |
73 | CP_ANONYMOUS_NAMESPACE_LEN) == 0) | |
9219021c | 74 | { |
aff410f1 MS |
75 | int dest_len = (previous_component == 0 |
76 | ? 0 : previous_component - 2); | |
8c902bb1 | 77 | int src_len = next_component; |
794684b6 | 78 | |
8c902bb1 SW |
79 | char *dest = alloca (dest_len + 1); |
80 | char *src = alloca (src_len + 1); | |
794684b6 | 81 | |
8c902bb1 SW |
82 | memcpy (dest, name, dest_len); |
83 | memcpy (src, name, src_len); | |
794684b6 | 84 | |
8c902bb1 SW |
85 | dest[dest_len] = '\0'; |
86 | src[src_len] = '\0'; | |
794684b6 | 87 | |
9219021c DC |
88 | /* We've found a component of the name that's an |
89 | anonymous namespace. So add symbols in it to the | |
90 | namespace given by the previous component if there is | |
91 | one, or to the global namespace if there isn't. */ | |
12aaed36 | 92 | cp_add_using_directive (dest, src, NULL, NULL, NULL, 1, |
a10964d1 | 93 | &objfile->objfile_obstack); |
9219021c DC |
94 | } |
95 | /* The "+ 2" is for the "::". */ | |
96 | previous_component = next_component + 2; | |
97 | next_component = (previous_component | |
98 | + cp_find_first_component (name | |
99 | + previous_component)); | |
100 | } | |
101 | } | |
102 | } | |
103 | ||
c0cc3a76 | 104 | |
aff410f1 MS |
105 | /* Add a using directive to using_directives. If the using directive |
106 | in question has already been added, don't add it twice. | |
107 | ||
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 | |
12aaed36 TT |
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 | |
32019081 | 117 | pointed to characters are not copied. */ |
9219021c DC |
118 | |
119 | void | |
13387711 SW |
120 | cp_add_using_directive (const char *dest, |
121 | const char *src, | |
122 | const char *alias, | |
123 | const char *declaration, | |
32019081 | 124 | VEC (const_char_ptr) *excludes, |
12aaed36 | 125 | int copy_names, |
c0cc3a76 | 126 | struct obstack *obstack) |
9219021c DC |
127 | { |
128 | struct using_direct *current; | |
129 | struct using_direct *new; | |
13387711 | 130 | |
9219021c DC |
131 | /* Has it already been added? */ |
132 | ||
27aa8d6a | 133 | for (current = using_directives; current != NULL; current = current->next) |
9219021c | 134 | { |
32019081 JK |
135 | int ix; |
136 | const char *param; | |
137 | ||
70c622a3 JK |
138 | if (strcmp (current->import_src, src) != 0) |
139 | continue; | |
140 | if (strcmp (current->import_dest, dest) != 0) | |
141 | continue; | |
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)) | |
146 | continue; | |
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)) | |
151 | continue; | |
152 | ||
32019081 JK |
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) | |
157 | break; | |
158 | if (ix < VEC_length (const_char_ptr, excludes) | |
159 | || current->excludes[ix] != NULL) | |
160 | continue; | |
161 | ||
70c622a3 JK |
162 | /* Parameters exactly match CURRENT. */ |
163 | return; | |
9219021c DC |
164 | } |
165 | ||
32019081 JK |
166 | new = obstack_alloc (obstack, (sizeof (*new) |
167 | + (VEC_length (const_char_ptr, excludes) | |
168 | * sizeof (*new->excludes)))); | |
169 | memset (new, 0, sizeof (*new)); | |
c0cc3a76 | 170 | |
12aaed36 TT |
171 | if (copy_names) |
172 | { | |
173 | new->import_src = obstack_copy0 (obstack, src, strlen (src)); | |
174 | new->import_dest = obstack_copy0 (obstack, dest, strlen (dest)); | |
175 | } | |
176 | else | |
177 | { | |
178 | new->import_src = src; | |
179 | new->import_dest = dest; | |
180 | } | |
794684b6 | 181 | |
12aaed36 | 182 | if (alias != NULL && copy_names) |
10f0c4bb | 183 | new->alias = obstack_copy0 (obstack, alias, strlen (alias)); |
12aaed36 TT |
184 | else |
185 | new->alias = alias; | |
c0cc3a76 | 186 | |
12aaed36 | 187 | if (declaration != NULL && copy_names) |
10f0c4bb TT |
188 | new->declaration = obstack_copy0 (obstack, |
189 | declaration, strlen (declaration)); | |
12aaed36 TT |
190 | else |
191 | new->declaration = declaration; | |
13387711 | 192 | |
32019081 JK |
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; | |
196 | ||
c0cc3a76 SW |
197 | new->next = using_directives; |
198 | using_directives = new; | |
9219021c DC |
199 | } |
200 | ||
9219021c DC |
201 | /* Test whether or not NAMESPACE looks like it mentions an anonymous |
202 | namespace; return nonzero if so. */ | |
203 | ||
204 | int | |
205 | cp_is_anonymous (const char *namespace) | |
206 | { | |
2b1dbab0 | 207 | return (strstr (namespace, CP_ANONYMOUS_NAMESPACE_STR) |
9219021c DC |
208 | != NULL); |
209 | } | |
210 | ||
1fcb5155 DC |
211 | /* The C++-specific version of name lookup for static and global |
212 | names. This makes sure that names get looked for in all namespaces | |
213 | that are in scope. NAME is the natural name of the symbol that | |
94af9270 | 214 | we're looking for, BLOCK is the block that we're searching within, |
07a1c2c3 | 215 | DOMAIN says what kind of symbols we're looking for. */ |
1fcb5155 DC |
216 | |
217 | struct symbol * | |
218 | cp_lookup_symbol_nonlocal (const char *name, | |
1fcb5155 | 219 | const struct block *block, |
21b556f4 | 220 | const domain_enum domain) |
1fcb5155 | 221 | { |
8540c487 SW |
222 | struct symbol *sym; |
223 | const char *scope = block_scope (block); | |
224 | ||
aff410f1 MS |
225 | sym = lookup_namespace_scope (name, block, |
226 | domain, scope, 0); | |
8540c487 SW |
227 | if (sym != NULL) |
228 | return sym; | |
229 | ||
aff410f1 MS |
230 | return cp_lookup_symbol_namespace (scope, name, |
231 | block, domain); | |
8540c487 SW |
232 | } |
233 | ||
34ef8452 DE |
234 | /* Look up NAME in BLOCK's static block and in global blocks. If |
235 | ANONYMOUS_NAMESPACE is nonzero, the symbol in question is located | |
236 | within an anonymous namespace. If SEARCH is non-zero, search through | |
237 | base classes for a matching symbol. Other arguments are as in | |
238 | cp_lookup_symbol_nonlocal. */ | |
239 | ||
240 | static struct symbol * | |
241 | lookup_symbol_file (const char *name, | |
242 | const struct block *block, | |
243 | const domain_enum domain, | |
244 | int anonymous_namespace, int search) | |
245 | { | |
246 | struct symbol *sym = NULL; | |
247 | ||
248 | sym = lookup_symbol_in_static_block (name, block, domain); | |
249 | if (sym != NULL) | |
250 | return sym; | |
251 | ||
252 | if (anonymous_namespace) | |
253 | { | |
254 | /* Symbols defined in anonymous namespaces have external linkage | |
255 | but should be treated as local to a single file nonetheless. | |
256 | So we only search the current file's global block. */ | |
257 | ||
258 | const struct block *global_block = block_global_block (block); | |
259 | ||
260 | if (global_block != NULL) | |
261 | sym = lookup_symbol_in_block (name, global_block, domain); | |
262 | } | |
263 | else | |
264 | { | |
265 | sym = lookup_global_symbol (name, block, domain); | |
266 | } | |
267 | ||
268 | if (sym != NULL) | |
269 | return sym; | |
270 | ||
271 | if (search) | |
272 | { | |
273 | char *klass, *nested; | |
274 | unsigned int prefix_len; | |
275 | struct cleanup *cleanup; | |
276 | struct symbol *klass_sym; | |
277 | ||
278 | /* A simple lookup failed. Check if the symbol was defined in | |
279 | a base class. */ | |
280 | ||
281 | cleanup = make_cleanup (null_cleanup, NULL); | |
282 | ||
283 | /* Find the name of the class and the name of the method, | |
284 | variable, etc. */ | |
285 | prefix_len = cp_entire_prefix_len (name); | |
286 | ||
287 | /* If no prefix was found, search "this". */ | |
288 | if (prefix_len == 0) | |
289 | { | |
290 | struct type *type; | |
291 | struct symbol *this; | |
292 | ||
293 | this = lookup_language_this (language_def (language_cplus), block); | |
294 | if (this == NULL) | |
295 | { | |
296 | do_cleanups (cleanup); | |
297 | return NULL; | |
298 | } | |
299 | ||
300 | type = check_typedef (TYPE_TARGET_TYPE (SYMBOL_TYPE (this))); | |
301 | /* If TYPE_NAME is NULL, abandon trying to find this symbol. | |
302 | This can happen for lambda functions compiled with clang++, | |
303 | which outputs no name for the container class. */ | |
304 | if (TYPE_NAME (type) == NULL) | |
305 | return NULL; | |
306 | klass = xstrdup (TYPE_NAME (type)); | |
307 | nested = xstrdup (name); | |
308 | } | |
309 | else | |
310 | { | |
311 | /* The class name is everything up to and including PREFIX_LEN. */ | |
312 | klass = savestring (name, prefix_len); | |
313 | ||
314 | /* The rest of the name is everything else past the initial scope | |
315 | operator. */ | |
316 | nested = xstrdup (name + prefix_len + 2); | |
317 | } | |
318 | ||
319 | /* Add cleanups to free memory for these strings. */ | |
320 | make_cleanup (xfree, klass); | |
321 | make_cleanup (xfree, nested); | |
322 | ||
323 | /* Lookup a class named KLASS. If none is found, there is nothing | |
324 | more that can be done. */ | |
325 | klass_sym = lookup_global_symbol (klass, block, domain); | |
326 | if (klass_sym == NULL) | |
327 | { | |
328 | do_cleanups (cleanup); | |
329 | return NULL; | |
330 | } | |
331 | ||
332 | /* Look for a symbol named NESTED in this class. */ | |
333 | sym = cp_lookup_nested_symbol (SYMBOL_TYPE (klass_sym), nested, block); | |
334 | do_cleanups (cleanup); | |
335 | } | |
336 | ||
337 | return sym; | |
338 | } | |
339 | ||
aff410f1 | 340 | /* Look up NAME in the C++ namespace NAMESPACE. Other arguments are |
8dea366b | 341 | as in cp_lookup_symbol_nonlocal. If SEARCH is non-zero, search |
4186eb54 | 342 | through base classes for a matching symbol. */ |
8540c487 SW |
343 | |
344 | static struct symbol * | |
345 | cp_lookup_symbol_in_namespace (const char *namespace, | |
346 | const char *name, | |
8540c487 | 347 | const struct block *block, |
8dea366b | 348 | const domain_enum domain, int search) |
8540c487 SW |
349 | { |
350 | if (namespace[0] == '\0') | |
351 | { | |
4186eb54 | 352 | return lookup_symbol_file (name, block, domain, 0, search); |
8540c487 SW |
353 | } |
354 | else | |
355 | { | |
aff410f1 MS |
356 | char *concatenated_name = alloca (strlen (namespace) + 2 |
357 | + strlen (name) + 1); | |
c5504eaf | 358 | |
8540c487 SW |
359 | strcpy (concatenated_name, namespace); |
360 | strcat (concatenated_name, "::"); | |
361 | strcat (concatenated_name, name); | |
4186eb54 KS |
362 | return lookup_symbol_file (concatenated_name, block, domain, |
363 | cp_is_anonymous (namespace), search); | |
8540c487 SW |
364 | } |
365 | } | |
366 | ||
b14e635e SW |
367 | /* Used for cleanups to reset the "searched" flag incase |
368 | of an error. */ | |
369 | ||
370 | static void | |
371 | reset_directive_searched (void *data) | |
372 | { | |
373 | struct using_direct *direct = data; | |
374 | direct->searched = 0; | |
375 | } | |
376 | ||
aff410f1 MS |
377 | /* Search for NAME by applying all import statements belonging to |
378 | BLOCK which are applicable in SCOPE. If DECLARATION_ONLY the | |
379 | search is restricted to using declarations. | |
13387711 SW |
380 | Example: |
381 | ||
aff410f1 | 382 | namespace A { |
13387711 SW |
383 | int x; |
384 | } | |
385 | using A::x; | |
386 | ||
aff410f1 MS |
387 | If SEARCH_PARENTS the search will include imports which are |
388 | applicable in parents of SCOPE. | |
b14e635e SW |
389 | Example: |
390 | ||
aff410f1 | 391 | namespace A { |
b14e635e | 392 | using namespace X; |
aff410f1 | 393 | namespace B { |
b14e635e SW |
394 | using namespace Y; |
395 | } | |
396 | } | |
397 | ||
aff410f1 MS |
398 | If SCOPE is "A::B" and SEARCH_PARENTS is true the imports of |
399 | namespaces X and Y will be considered. If SEARCH_PARENTS is false | |
400 | only the import of Y is considered. */ | |
8540c487 | 401 | |
9a80057a | 402 | static struct symbol * |
8540c487 SW |
403 | cp_lookup_symbol_imports (const char *scope, |
404 | const char *name, | |
8540c487 | 405 | const struct block *block, |
b14e635e | 406 | const domain_enum domain, |
13387711 | 407 | const int declaration_only, |
b14e635e | 408 | const int search_parents) |
8540c487 | 409 | { |
b14e635e | 410 | struct using_direct *current; |
13387711 | 411 | struct symbol *sym = NULL; |
8540c487 | 412 | int len; |
b14e635e SW |
413 | int directive_match; |
414 | struct cleanup *searched_cleanup; | |
8540c487 SW |
415 | |
416 | /* First, try to find the symbol in the given namespace. */ | |
13387711 | 417 | if (!declaration_only) |
aff410f1 | 418 | sym = cp_lookup_symbol_in_namespace (scope, name, |
8dea366b | 419 | block, domain, 1); |
13387711 | 420 | |
8540c487 SW |
421 | if (sym != NULL) |
422 | return sym; | |
423 | ||
aff410f1 MS |
424 | /* Go through the using directives. If any of them add new names to |
425 | the namespace we're searching in, see if we can find a match by | |
426 | applying them. */ | |
8540c487 SW |
427 | |
428 | for (current = block_using (block); | |
429 | current != NULL; | |
430 | current = current->next) | |
431 | { | |
32019081 JK |
432 | const char **excludep; |
433 | ||
b14e635e SW |
434 | len = strlen (current->import_dest); |
435 | directive_match = (search_parents | |
436 | ? (strncmp (scope, current->import_dest, | |
437 | strlen (current->import_dest)) == 0 | |
438 | && (len == 0 | |
aff410f1 MS |
439 | || scope[len] == ':' |
440 | || scope[len] == '\0')) | |
b14e635e | 441 | : strcmp (scope, current->import_dest) == 0); |
8540c487 | 442 | |
aff410f1 MS |
443 | /* If the import destination is the current scope or one of its |
444 | ancestors then it is applicable. */ | |
b14e635e | 445 | if (directive_match && !current->searched) |
8540c487 | 446 | { |
a1d705ee TT |
447 | /* Mark this import as searched so that the recursive call |
448 | does not search it again. */ | |
449 | current->searched = 1; | |
450 | searched_cleanup = make_cleanup (reset_directive_searched, | |
451 | current); | |
452 | ||
453 | /* If there is an import of a single declaration, compare the | |
454 | imported declaration (after optional renaming by its alias) | |
455 | with the sought out name. If there is a match pass | |
456 | current->import_src as NAMESPACE to direct the search | |
457 | towards the imported namespace. */ | |
458 | if (current->declaration | |
459 | && strcmp (name, current->alias | |
460 | ? current->alias : current->declaration) == 0) | |
461 | sym = cp_lookup_symbol_in_namespace (current->import_src, | |
462 | current->declaration, | |
8dea366b | 463 | block, domain, 1); |
a1d705ee TT |
464 | |
465 | /* If this is a DECLARATION_ONLY search or a symbol was found | |
466 | or this import statement was an import declaration, the | |
467 | search of this import is complete. */ | |
468 | if (declaration_only || sym != NULL || current->declaration) | |
469 | { | |
470 | current->searched = 0; | |
471 | discard_cleanups (searched_cleanup); | |
472 | ||
473 | if (sym != NULL) | |
474 | return sym; | |
475 | ||
476 | continue; | |
477 | } | |
478 | ||
479 | /* Do not follow CURRENT if NAME matches its EXCLUDES. */ | |
480 | for (excludep = current->excludes; *excludep; excludep++) | |
481 | if (strcmp (name, *excludep) == 0) | |
482 | break; | |
483 | if (*excludep) | |
484 | { | |
485 | discard_cleanups (searched_cleanup); | |
486 | continue; | |
487 | } | |
488 | ||
489 | if (current->alias != NULL | |
490 | && strcmp (name, current->alias) == 0) | |
491 | /* If the import is creating an alias and the alias matches | |
492 | the sought name. Pass current->import_src as the NAME to | |
493 | direct the search towards the aliased namespace. */ | |
494 | { | |
495 | sym = cp_lookup_symbol_in_namespace (scope, | |
496 | current->import_src, | |
8dea366b | 497 | block, domain, 1); |
a1d705ee TT |
498 | } |
499 | else if (current->alias == NULL) | |
500 | { | |
501 | /* If this import statement creates no alias, pass | |
502 | current->inner as NAMESPACE to direct the search | |
503 | towards the imported namespace. */ | |
504 | sym = cp_lookup_symbol_imports (current->import_src, | |
505 | name, block, | |
506 | domain, 0, 0); | |
507 | } | |
508 | current->searched = 0; | |
509 | discard_cleanups (searched_cleanup); | |
510 | ||
511 | if (sym != NULL) | |
512 | return sym; | |
8540c487 SW |
513 | } |
514 | } | |
515 | ||
516 | return NULL; | |
517 | } | |
518 | ||
34eaf542 TT |
519 | /* Helper function that searches an array of symbols for one named |
520 | NAME. */ | |
521 | ||
522 | static struct symbol * | |
aff410f1 MS |
523 | search_symbol_list (const char *name, int num, |
524 | struct symbol **syms) | |
34eaf542 TT |
525 | { |
526 | int i; | |
527 | ||
528 | /* Maybe we should store a dictionary in here instead. */ | |
529 | for (i = 0; i < num; ++i) | |
530 | { | |
531 | if (strcmp (name, SYMBOL_NATURAL_NAME (syms[i])) == 0) | |
532 | return syms[i]; | |
533 | } | |
534 | return NULL; | |
535 | } | |
536 | ||
537 | /* Like cp_lookup_symbol_imports, but if BLOCK is a function, it | |
538 | searches through the template parameters of the function and the | |
539 | function's type. */ | |
540 | ||
541 | struct symbol * | |
542 | cp_lookup_symbol_imports_or_template (const char *scope, | |
543 | const char *name, | |
544 | const struct block *block, | |
545 | const domain_enum domain) | |
546 | { | |
547 | struct symbol *function = BLOCK_FUNCTION (block); | |
548 | ||
549 | if (function != NULL && SYMBOL_LANGUAGE (function) == language_cplus) | |
550 | { | |
34eaf542 TT |
551 | /* Search the function's template parameters. */ |
552 | if (SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION (function)) | |
553 | { | |
aff410f1 MS |
554 | struct template_symbol *templ |
555 | = (struct template_symbol *) function; | |
34eaf542 TT |
556 | struct symbol *result; |
557 | ||
558 | result = search_symbol_list (name, | |
559 | templ->n_template_arguments, | |
560 | templ->template_arguments); | |
561 | if (result != NULL) | |
562 | return result; | |
563 | } | |
564 | ||
565 | /* Search the template parameters of the function's defining | |
566 | context. */ | |
567 | if (SYMBOL_NATURAL_NAME (function)) | |
568 | { | |
569 | struct type *context; | |
570 | char *name_copy = xstrdup (SYMBOL_NATURAL_NAME (function)); | |
571 | struct cleanup *cleanups = make_cleanup (xfree, name_copy); | |
572 | const struct language_defn *lang = language_def (language_cplus); | |
df6d5441 | 573 | struct gdbarch *arch |
aff08958 | 574 | = get_objfile_arch (SYMBOL_OBJFILE (function)); |
34eaf542 TT |
575 | const struct block *parent = BLOCK_SUPERBLOCK (block); |
576 | ||
577 | while (1) | |
578 | { | |
579 | struct symbol *result; | |
580 | unsigned int prefix_len = cp_entire_prefix_len (name_copy); | |
581 | ||
582 | if (prefix_len == 0) | |
583 | context = NULL; | |
584 | else | |
585 | { | |
586 | name_copy[prefix_len] = '\0'; | |
aff410f1 MS |
587 | context = lookup_typename (lang, arch, |
588 | name_copy, | |
589 | parent, 1); | |
34eaf542 TT |
590 | } |
591 | ||
592 | if (context == NULL) | |
593 | break; | |
594 | ||
aff410f1 MS |
595 | result |
596 | = search_symbol_list (name, | |
597 | TYPE_N_TEMPLATE_ARGUMENTS (context), | |
598 | TYPE_TEMPLATE_ARGUMENTS (context)); | |
34eaf542 | 599 | if (result != NULL) |
c27e16e3 TT |
600 | { |
601 | do_cleanups (cleanups); | |
602 | return result; | |
603 | } | |
34eaf542 TT |
604 | } |
605 | ||
606 | do_cleanups (cleanups); | |
607 | } | |
608 | } | |
609 | ||
610 | return cp_lookup_symbol_imports (scope, name, block, domain, 1, 1); | |
611 | } | |
612 | ||
aff410f1 MS |
613 | /* Searches for NAME in the current namespace, and by applying |
614 | relevant import statements belonging to BLOCK and its parents. | |
615 | SCOPE is the namespace scope of the context in which the search is | |
4186eb54 | 616 | being evaluated. */ |
8540c487 SW |
617 | |
618 | struct symbol* | |
619 | cp_lookup_symbol_namespace (const char *scope, | |
620 | const char *name, | |
8540c487 | 621 | const struct block *block, |
13387711 | 622 | const domain_enum domain) |
8540c487 SW |
623 | { |
624 | struct symbol *sym; | |
13387711 SW |
625 | |
626 | /* First, try to find the symbol in the given namespace. */ | |
aff410f1 | 627 | sym = cp_lookup_symbol_in_namespace (scope, name, |
8dea366b | 628 | block, domain, 1); |
13387711 SW |
629 | if (sym != NULL) |
630 | return sym; | |
8540c487 | 631 | |
aff410f1 MS |
632 | /* Search for name in namespaces imported to this and parent |
633 | blocks. */ | |
8540c487 SW |
634 | while (block != NULL) |
635 | { | |
aff410f1 MS |
636 | sym = cp_lookup_symbol_imports (scope, name, block, |
637 | domain, 0, 1); | |
8540c487 SW |
638 | |
639 | if (sym) | |
640 | return sym; | |
641 | ||
642 | block = BLOCK_SUPERBLOCK (block); | |
643 | } | |
644 | ||
645 | return NULL; | |
1fcb5155 DC |
646 | } |
647 | ||
648 | /* Lookup NAME at namespace scope (or, in C terms, in static and | |
649 | global variables). SCOPE is the namespace that the current | |
650 | function is defined within; only consider namespaces whose length | |
651 | is at least SCOPE_LEN. Other arguments are as in | |
652 | cp_lookup_symbol_nonlocal. | |
653 | ||
654 | For example, if we're within a function A::B::f and looking for a | |
3882f37a | 655 | symbol x, this will get called with NAME = "x", SCOPE = "A::B", and |
1fcb5155 DC |
656 | SCOPE_LEN = 0. It then calls itself with NAME and SCOPE the same, |
657 | but with SCOPE_LEN = 1. And then it calls itself with NAME and | |
658 | SCOPE the same, but with SCOPE_LEN = 4. This third call looks for | |
659 | "A::B::x"; if it doesn't find it, then the second call looks for | |
660 | "A::x", and if that call fails, then the first call looks for | |
661 | "x". */ | |
662 | ||
663 | static struct symbol * | |
664 | lookup_namespace_scope (const char *name, | |
1fcb5155 DC |
665 | const struct block *block, |
666 | const domain_enum domain, | |
1fcb5155 DC |
667 | const char *scope, |
668 | int scope_len) | |
669 | { | |
670 | char *namespace; | |
671 | ||
672 | if (scope[scope_len] != '\0') | |
673 | { | |
674 | /* Recursively search for names in child namespaces first. */ | |
675 | ||
676 | struct symbol *sym; | |
677 | int new_scope_len = scope_len; | |
678 | ||
679 | /* If the current scope is followed by "::", skip past that. */ | |
680 | if (new_scope_len != 0) | |
681 | { | |
682 | gdb_assert (scope[new_scope_len] == ':'); | |
683 | new_scope_len += 2; | |
684 | } | |
685 | new_scope_len += cp_find_first_component (scope + new_scope_len); | |
aff410f1 MS |
686 | sym = lookup_namespace_scope (name, block, domain, |
687 | scope, new_scope_len); | |
1fcb5155 DC |
688 | if (sym != NULL) |
689 | return sym; | |
690 | } | |
691 | ||
692 | /* Okay, we didn't find a match in our children, so look for the | |
693 | name in the current namespace. */ | |
694 | ||
695 | namespace = alloca (scope_len + 1); | |
696 | strncpy (namespace, scope, scope_len); | |
697 | namespace[scope_len] = '\0'; | |
aff410f1 | 698 | return cp_lookup_symbol_in_namespace (namespace, name, |
8dea366b | 699 | block, domain, 1); |
1fcb5155 DC |
700 | } |
701 | ||
f7e3ecae KS |
702 | /* Search through the base classes of PARENT_TYPE for a base class |
703 | named NAME and return its type. If not found, return NULL. */ | |
704 | ||
705 | struct type * | |
706 | find_type_baseclass_by_name (struct type *parent_type, const char *name) | |
707 | { | |
708 | int i; | |
709 | ||
710 | CHECK_TYPEDEF (parent_type); | |
711 | for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i) | |
712 | { | |
713 | struct type *type = check_typedef (TYPE_BASECLASS (parent_type, i)); | |
714 | const char *base_name = TYPE_BASECLASS_NAME (parent_type, i); | |
715 | ||
716 | if (base_name == NULL) | |
717 | continue; | |
718 | ||
719 | if (streq (base_name, name)) | |
720 | return type; | |
721 | ||
722 | type = find_type_baseclass_by_name (type, name); | |
723 | if (type != NULL) | |
724 | return type; | |
725 | } | |
726 | ||
727 | return NULL; | |
728 | } | |
729 | ||
8dea366b KS |
730 | /* Search through the base classes of PARENT_TYPE for a symbol named |
731 | NAME in block BLOCK. */ | |
732 | ||
733 | static struct symbol * | |
734 | find_symbol_in_baseclass (struct type *parent_type, const char *name, | |
735 | const struct block *block) | |
736 | { | |
737 | int i; | |
738 | struct symbol *sym; | |
739 | struct cleanup *cleanup; | |
740 | char *concatenated_name; | |
741 | ||
742 | sym = NULL; | |
743 | concatenated_name = NULL; | |
744 | cleanup = make_cleanup (free_current_contents, &concatenated_name); | |
745 | for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i) | |
746 | { | |
747 | size_t len; | |
69fc87c2 | 748 | struct type *base_type = TYPE_BASECLASS (parent_type, i); |
8dea366b KS |
749 | const char *base_name = TYPE_BASECLASS_NAME (parent_type, i); |
750 | ||
751 | if (base_name == NULL) | |
752 | continue; | |
753 | ||
754 | /* Search this particular base class. */ | |
69fc87c2 DE |
755 | sym = cp_lookup_symbol_in_namespace (base_name, name, block, |
756 | VAR_DOMAIN, 0); | |
8dea366b KS |
757 | if (sym != NULL) |
758 | break; | |
759 | ||
69fc87c2 DE |
760 | /* Now search all static file-level symbols. We have to do this for |
761 | things like typedefs in the class. First search in this symtab, | |
762 | what we want is possibly there. */ | |
8dea366b KS |
763 | len = strlen (base_name) + 2 + strlen (name) + 1; |
764 | concatenated_name = xrealloc (concatenated_name, len); | |
765 | xsnprintf (concatenated_name, len, "%s::%s", base_name, name); | |
24d864bb DE |
766 | sym = lookup_symbol_in_static_block (concatenated_name, block, |
767 | VAR_DOMAIN); | |
69fc87c2 DE |
768 | if (sym != NULL) |
769 | break; | |
8dea366b | 770 | |
69fc87c2 DE |
771 | /* Nope. We now have to search all static blocks in all objfiles, |
772 | even if block != NULL, because there's no guarantees as to which | |
773 | symtab the symbol we want is in. */ | |
24d864bb | 774 | sym = lookup_static_symbol (concatenated_name, VAR_DOMAIN); |
69fc87c2 DE |
775 | if (sym != NULL) |
776 | break; | |
8dea366b KS |
777 | |
778 | /* If this class has base classes, search them next. */ | |
69fc87c2 DE |
779 | CHECK_TYPEDEF (base_type); |
780 | if (TYPE_N_BASECLASSES (base_type) > 0) | |
8dea366b | 781 | { |
69fc87c2 | 782 | sym = find_symbol_in_baseclass (base_type, name, block); |
8dea366b KS |
783 | if (sym != NULL) |
784 | break; | |
785 | } | |
786 | } | |
787 | ||
788 | do_cleanups (cleanup); | |
0c2e6019 | 789 | return sym; |
5c4e30ca DC |
790 | } |
791 | ||
50af5481 | 792 | /* Look up a symbol named NESTED_NAME that is nested inside the C++ |
79c2c32d DC |
793 | class or namespace given by PARENT_TYPE, from within the context |
794 | given by BLOCK. Return NULL if there is no such nested type. */ | |
795 | ||
50af5481 JK |
796 | struct symbol * |
797 | cp_lookup_nested_symbol (struct type *parent_type, | |
798 | const char *nested_name, | |
799 | const struct block *block) | |
79c2c32d | 800 | { |
d8228535 JK |
801 | /* type_name_no_tag_required provides better error reporting using the |
802 | original type. */ | |
803 | struct type *saved_parent_type = parent_type; | |
804 | ||
805 | CHECK_TYPEDEF (parent_type); | |
806 | ||
79c2c32d DC |
807 | switch (TYPE_CODE (parent_type)) |
808 | { | |
63d06c5c | 809 | case TYPE_CODE_STRUCT: |
79c2c32d | 810 | case TYPE_CODE_NAMESPACE: |
48e32051 | 811 | case TYPE_CODE_UNION: |
3d567982 | 812 | case TYPE_CODE_ENUM: |
530e8392 KB |
813 | /* NOTE: Handle modules here as well, because Fortran is re-using the C++ |
814 | specific code to lookup nested symbols in modules, by calling the | |
815 | function pointer la_lookup_symbol_nonlocal, which ends up here. */ | |
816 | case TYPE_CODE_MODULE: | |
79c2c32d | 817 | { |
63d06c5c DC |
818 | /* NOTE: carlton/2003-11-10: We don't treat C++ class members |
819 | of classes like, say, data or function members. Instead, | |
820 | they're just represented by symbols whose names are | |
821 | qualified by the name of the surrounding class. This is | |
822 | just like members of namespaces; in particular, | |
823 | lookup_symbol_namespace works when looking them up. */ | |
824 | ||
08850b56 | 825 | int size; |
d8228535 | 826 | const char *parent_name = type_name_no_tag_or_error (saved_parent_type); |
aff410f1 MS |
827 | struct symbol *sym |
828 | = cp_lookup_symbol_in_namespace (parent_name, nested_name, | |
8dea366b | 829 | block, VAR_DOMAIN, 0); |
41f62f39 | 830 | char *concatenated_name; |
c5504eaf | 831 | |
50af5481 JK |
832 | if (sym != NULL) |
833 | return sym; | |
41f62f39 | 834 | |
69fc87c2 DE |
835 | /* Now search all static file-level symbols. We have to do this |
836 | for things like typedefs in the class. We do not try to | |
aff410f1 | 837 | guess any imported namespace as even the fully specified |
8dea366b | 838 | namespace search is already not C++ compliant and more |
aff410f1 | 839 | assumptions could make it too magic. */ |
41f62f39 | 840 | |
08850b56 PM |
841 | size = strlen (parent_name) + 2 + strlen (nested_name) + 1; |
842 | concatenated_name = alloca (size); | |
843 | xsnprintf (concatenated_name, size, "%s::%s", | |
aff410f1 | 844 | parent_name, nested_name); |
24d864bb | 845 | sym = lookup_static_symbol (concatenated_name, VAR_DOMAIN); |
50af5481 JK |
846 | if (sym != NULL) |
847 | return sym; | |
41f62f39 | 848 | |
8dea366b KS |
849 | /* If no matching symbols were found, try searching any |
850 | base classes. */ | |
851 | return find_symbol_in_baseclass (parent_type, nested_name, block); | |
79c2c32d | 852 | } |
bb869963 SDJ |
853 | |
854 | case TYPE_CODE_FUNC: | |
855 | case TYPE_CODE_METHOD: | |
856 | return NULL; | |
857 | ||
79c2c32d DC |
858 | default: |
859 | internal_error (__FILE__, __LINE__, | |
50af5481 | 860 | _("cp_lookup_nested_symbol called " |
3e43a32a | 861 | "on a non-aggregate type.")); |
79c2c32d DC |
862 | } |
863 | } | |
864 | ||
b368761e DC |
865 | /* The C++-version of lookup_transparent_type. */ |
866 | ||
867 | /* FIXME: carlton/2004-01-16: The problem that this is trying to | |
868 | address is that, unfortunately, sometimes NAME is wrong: it may not | |
869 | include the name of namespaces enclosing the type in question. | |
b021a221 | 870 | lookup_transparent_type gets called when the type in question |
b368761e DC |
871 | is a declaration, and we're trying to find its definition; but, for |
872 | declarations, our type name deduction mechanism doesn't work. | |
873 | There's nothing we can do to fix this in general, I think, in the | |
874 | absence of debug information about namespaces (I've filed PR | |
875 | gdb/1511 about this); until such debug information becomes more | |
876 | prevalent, one heuristic which sometimes looks is to search for the | |
877 | definition in namespaces containing the current namespace. | |
878 | ||
879 | We should delete this functions once the appropriate debug | |
880 | information becomes more widespread. (GCC 3.4 will be the first | |
881 | released version of GCC with such information.) */ | |
882 | ||
883 | struct type * | |
884 | cp_lookup_transparent_type (const char *name) | |
885 | { | |
886 | /* First, try the honest way of looking up the definition. */ | |
887 | struct type *t = basic_lookup_transparent_type (name); | |
888 | const char *scope; | |
889 | ||
890 | if (t != NULL) | |
891 | return t; | |
892 | ||
893 | /* If that doesn't work and we're within a namespace, look there | |
894 | instead. */ | |
895 | scope = block_scope (get_selected_block (0)); | |
896 | ||
897 | if (scope[0] == '\0') | |
898 | return NULL; | |
899 | ||
900 | return cp_lookup_transparent_type_loop (name, scope, 0); | |
901 | } | |
902 | ||
b021a221 MS |
903 | /* Lookup the type definition associated to NAME in namespaces/classes |
904 | containing SCOPE whose name is strictly longer than LENGTH. LENGTH | |
905 | must be the index of the start of a component of SCOPE. */ | |
b368761e DC |
906 | |
907 | static struct type * | |
aff410f1 MS |
908 | cp_lookup_transparent_type_loop (const char *name, |
909 | const char *scope, | |
b368761e DC |
910 | int length) |
911 | { | |
1198ecbe | 912 | int scope_length = length + cp_find_first_component (scope + length); |
b368761e DC |
913 | char *full_name; |
914 | ||
915 | /* If the current scope is followed by "::", look in the next | |
916 | component. */ | |
917 | if (scope[scope_length] == ':') | |
918 | { | |
919 | struct type *retval | |
aff410f1 MS |
920 | = cp_lookup_transparent_type_loop (name, scope, |
921 | scope_length + 2); | |
c5504eaf | 922 | |
b368761e DC |
923 | if (retval != NULL) |
924 | return retval; | |
925 | } | |
926 | ||
927 | full_name = alloca (scope_length + 2 + strlen (name) + 1); | |
928 | strncpy (full_name, scope, scope_length); | |
929 | strncpy (full_name + scope_length, "::", 2); | |
930 | strcpy (full_name + scope_length + 2, name); | |
931 | ||
932 | return basic_lookup_transparent_type (full_name); | |
933 | } | |
934 | ||
0c2e6019 TT |
935 | /* This used to do something but was removed when it became |
936 | obsolete. */ | |
5c4e30ca DC |
937 | |
938 | static void | |
939 | maintenance_cplus_namespace (char *args, int from_tty) | |
940 | { | |
0c2e6019 | 941 | printf_unfiltered (_("The `maint namespace' command was removed.\n")); |
5c4e30ca DC |
942 | } |
943 | ||
2c0b251b PA |
944 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
945 | extern initialize_file_ftype _initialize_cp_namespace; | |
946 | ||
5c4e30ca DC |
947 | void |
948 | _initialize_cp_namespace (void) | |
949 | { | |
0c2e6019 TT |
950 | struct cmd_list_element *cmd; |
951 | ||
952 | cmd = add_cmd ("namespace", class_maintenance, | |
953 | maintenance_cplus_namespace, | |
954 | _("Deprecated placeholder for removed functionality."), | |
955 | &maint_cplus_cmd_list); | |
956 | deprecate_cmd (cmd, NULL); | |
1fcb5155 | 957 | } |