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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 | |
b368761e DC |
35 | static struct type *cp_lookup_transparent_type_loop (const char *name, |
36 | const char *scope, | |
37 | int scope_len); | |
38 | ||
9219021c DC |
39 | /* Check to see if SYMBOL refers to an object contained within an |
40 | anonymous namespace; if so, add an appropriate using directive. */ | |
41 | ||
9219021c | 42 | void |
a10964d1 AR |
43 | cp_scan_for_anonymous_namespaces (const struct symbol *const symbol, |
44 | struct objfile *const objfile) | |
9219021c | 45 | { |
df8a16a1 | 46 | if (SYMBOL_DEMANGLED_NAME (symbol) != NULL) |
9219021c | 47 | { |
df8a16a1 | 48 | const char *name = SYMBOL_DEMANGLED_NAME (symbol); |
9219021c DC |
49 | unsigned int previous_component; |
50 | unsigned int next_component; | |
9219021c DC |
51 | |
52 | /* Start with a quick-and-dirty check for mention of "(anonymous | |
53 | namespace)". */ | |
54 | ||
59da4d04 | 55 | if (!cp_is_in_anonymous (name)) |
9219021c DC |
56 | return; |
57 | ||
58 | previous_component = 0; | |
59 | next_component = cp_find_first_component (name + previous_component); | |
60 | ||
61 | while (name[next_component] == ':') | |
62 | { | |
2b1dbab0 KS |
63 | if (((next_component - previous_component) |
64 | == CP_ANONYMOUS_NAMESPACE_LEN) | |
9219021c | 65 | && strncmp (name + previous_component, |
2b1dbab0 KS |
66 | CP_ANONYMOUS_NAMESPACE_STR, |
67 | CP_ANONYMOUS_NAMESPACE_LEN) == 0) | |
9219021c | 68 | { |
aff410f1 MS |
69 | int dest_len = (previous_component == 0 |
70 | ? 0 : previous_component - 2); | |
8c902bb1 | 71 | int src_len = next_component; |
794684b6 | 72 | |
8c902bb1 SW |
73 | char *dest = alloca (dest_len + 1); |
74 | char *src = alloca (src_len + 1); | |
794684b6 | 75 | |
8c902bb1 SW |
76 | memcpy (dest, name, dest_len); |
77 | memcpy (src, name, src_len); | |
794684b6 | 78 | |
8c902bb1 SW |
79 | dest[dest_len] = '\0'; |
80 | src[src_len] = '\0'; | |
794684b6 | 81 | |
9219021c DC |
82 | /* We've found a component of the name that's an |
83 | anonymous namespace. So add symbols in it to the | |
84 | namespace given by the previous component if there is | |
85 | one, or to the global namespace if there isn't. */ | |
12aaed36 | 86 | cp_add_using_directive (dest, src, NULL, NULL, NULL, 1, |
a10964d1 | 87 | &objfile->objfile_obstack); |
9219021c DC |
88 | } |
89 | /* The "+ 2" is for the "::". */ | |
90 | previous_component = next_component + 2; | |
91 | next_component = (previous_component | |
92 | + cp_find_first_component (name | |
93 | + previous_component)); | |
94 | } | |
95 | } | |
96 | } | |
97 | ||
c0cc3a76 | 98 | |
aff410f1 MS |
99 | /* Add a using directive to using_directives. If the using directive |
100 | in question has already been added, don't add it twice. | |
101 | ||
102 | Create a new struct using_direct which imports the namespace SRC | |
103 | into the scope DEST. ALIAS is the name of the imported namespace | |
104 | in the current scope. If ALIAS is NULL then the namespace is known | |
105 | by its original name. DECLARATION is the name if the imported | |
106 | varable if this is a declaration import (Eg. using A::x), otherwise | |
12aaed36 TT |
107 | it is NULL. EXCLUDES is a list of names not to import from an |
108 | imported module or NULL. If COPY_NAMES is non-zero, then the | |
109 | arguments are copied into newly allocated memory so they can be | |
110 | temporaries. For EXCLUDES the VEC pointers are copied but the | |
32019081 | 111 | pointed to characters are not copied. */ |
9219021c DC |
112 | |
113 | void | |
13387711 SW |
114 | cp_add_using_directive (const char *dest, |
115 | const char *src, | |
116 | const char *alias, | |
117 | const char *declaration, | |
32019081 | 118 | VEC (const_char_ptr) *excludes, |
12aaed36 | 119 | int copy_names, |
c0cc3a76 | 120 | struct obstack *obstack) |
9219021c DC |
121 | { |
122 | struct using_direct *current; | |
123 | struct using_direct *new; | |
13387711 | 124 | |
9219021c DC |
125 | /* Has it already been added? */ |
126 | ||
27aa8d6a | 127 | for (current = using_directives; current != NULL; current = current->next) |
9219021c | 128 | { |
32019081 JK |
129 | int ix; |
130 | const char *param; | |
131 | ||
70c622a3 JK |
132 | if (strcmp (current->import_src, src) != 0) |
133 | continue; | |
134 | if (strcmp (current->import_dest, dest) != 0) | |
135 | continue; | |
136 | if ((alias == NULL && current->alias != NULL) | |
137 | || (alias != NULL && current->alias == NULL) | |
138 | || (alias != NULL && current->alias != NULL | |
139 | && strcmp (alias, current->alias) != 0)) | |
140 | continue; | |
141 | if ((declaration == NULL && current->declaration != NULL) | |
142 | || (declaration != NULL && current->declaration == NULL) | |
143 | || (declaration != NULL && current->declaration != NULL | |
144 | && strcmp (declaration, current->declaration) != 0)) | |
145 | continue; | |
146 | ||
32019081 JK |
147 | /* Compare the contents of EXCLUDES. */ |
148 | for (ix = 0; VEC_iterate (const_char_ptr, excludes, ix, param); ix++) | |
149 | if (current->excludes[ix] == NULL | |
150 | || strcmp (param, current->excludes[ix]) != 0) | |
151 | break; | |
152 | if (ix < VEC_length (const_char_ptr, excludes) | |
153 | || current->excludes[ix] != NULL) | |
154 | continue; | |
155 | ||
70c622a3 JK |
156 | /* Parameters exactly match CURRENT. */ |
157 | return; | |
9219021c DC |
158 | } |
159 | ||
32019081 JK |
160 | new = obstack_alloc (obstack, (sizeof (*new) |
161 | + (VEC_length (const_char_ptr, excludes) | |
162 | * sizeof (*new->excludes)))); | |
163 | memset (new, 0, sizeof (*new)); | |
c0cc3a76 | 164 | |
12aaed36 TT |
165 | if (copy_names) |
166 | { | |
167 | new->import_src = obstack_copy0 (obstack, src, strlen (src)); | |
168 | new->import_dest = obstack_copy0 (obstack, dest, strlen (dest)); | |
169 | } | |
170 | else | |
171 | { | |
172 | new->import_src = src; | |
173 | new->import_dest = dest; | |
174 | } | |
794684b6 | 175 | |
12aaed36 | 176 | if (alias != NULL && copy_names) |
10f0c4bb | 177 | new->alias = obstack_copy0 (obstack, alias, strlen (alias)); |
12aaed36 TT |
178 | else |
179 | new->alias = alias; | |
c0cc3a76 | 180 | |
12aaed36 | 181 | if (declaration != NULL && copy_names) |
10f0c4bb TT |
182 | new->declaration = obstack_copy0 (obstack, |
183 | declaration, strlen (declaration)); | |
12aaed36 TT |
184 | else |
185 | new->declaration = declaration; | |
13387711 | 186 | |
32019081 JK |
187 | memcpy (new->excludes, VEC_address (const_char_ptr, excludes), |
188 | VEC_length (const_char_ptr, excludes) * sizeof (*new->excludes)); | |
189 | new->excludes[VEC_length (const_char_ptr, excludes)] = NULL; | |
190 | ||
c0cc3a76 SW |
191 | new->next = using_directives; |
192 | using_directives = new; | |
9219021c DC |
193 | } |
194 | ||
9219021c DC |
195 | /* Test whether or not NAMESPACE looks like it mentions an anonymous |
196 | namespace; return nonzero if so. */ | |
197 | ||
198 | int | |
59da4d04 | 199 | cp_is_in_anonymous (const char *symbol_name) |
9219021c | 200 | { |
59da4d04 | 201 | return (strstr (symbol_name, CP_ANONYMOUS_NAMESPACE_STR) |
9219021c DC |
202 | != NULL); |
203 | } | |
204 | ||
34ef8452 DE |
205 | /* Look up NAME in BLOCK's static block and in global blocks. If |
206 | ANONYMOUS_NAMESPACE is nonzero, the symbol in question is located | |
207 | within an anonymous namespace. If SEARCH is non-zero, search through | |
208 | base classes for a matching symbol. Other arguments are as in | |
209 | cp_lookup_symbol_nonlocal. */ | |
210 | ||
211 | static struct symbol * | |
212 | lookup_symbol_file (const char *name, | |
213 | const struct block *block, | |
214 | const domain_enum domain, | |
215 | int anonymous_namespace, int search) | |
216 | { | |
217 | struct symbol *sym = NULL; | |
218 | ||
219 | sym = lookup_symbol_in_static_block (name, block, domain); | |
220 | if (sym != NULL) | |
221 | return sym; | |
222 | ||
223 | if (anonymous_namespace) | |
224 | { | |
225 | /* Symbols defined in anonymous namespaces have external linkage | |
226 | but should be treated as local to a single file nonetheless. | |
227 | So we only search the current file's global block. */ | |
228 | ||
229 | const struct block *global_block = block_global_block (block); | |
230 | ||
231 | if (global_block != NULL) | |
232 | sym = lookup_symbol_in_block (name, global_block, domain); | |
233 | } | |
234 | else | |
235 | { | |
236 | sym = lookup_global_symbol (name, block, domain); | |
237 | } | |
238 | ||
239 | if (sym != NULL) | |
240 | return sym; | |
241 | ||
242 | if (search) | |
243 | { | |
244 | char *klass, *nested; | |
245 | unsigned int prefix_len; | |
246 | struct cleanup *cleanup; | |
247 | struct symbol *klass_sym; | |
248 | ||
249 | /* A simple lookup failed. Check if the symbol was defined in | |
250 | a base class. */ | |
251 | ||
252 | cleanup = make_cleanup (null_cleanup, NULL); | |
253 | ||
254 | /* Find the name of the class and the name of the method, | |
255 | variable, etc. */ | |
256 | prefix_len = cp_entire_prefix_len (name); | |
257 | ||
258 | /* If no prefix was found, search "this". */ | |
259 | if (prefix_len == 0) | |
260 | { | |
261 | struct type *type; | |
262 | struct symbol *this; | |
263 | ||
264 | this = lookup_language_this (language_def (language_cplus), block); | |
265 | if (this == NULL) | |
266 | { | |
267 | do_cleanups (cleanup); | |
268 | return NULL; | |
269 | } | |
270 | ||
271 | type = check_typedef (TYPE_TARGET_TYPE (SYMBOL_TYPE (this))); | |
272 | /* If TYPE_NAME is NULL, abandon trying to find this symbol. | |
273 | This can happen for lambda functions compiled with clang++, | |
274 | which outputs no name for the container class. */ | |
275 | if (TYPE_NAME (type) == NULL) | |
276 | return NULL; | |
277 | klass = xstrdup (TYPE_NAME (type)); | |
278 | nested = xstrdup (name); | |
279 | } | |
280 | else | |
281 | { | |
282 | /* The class name is everything up to and including PREFIX_LEN. */ | |
283 | klass = savestring (name, prefix_len); | |
284 | ||
285 | /* The rest of the name is everything else past the initial scope | |
286 | operator. */ | |
287 | nested = xstrdup (name + prefix_len + 2); | |
288 | } | |
289 | ||
290 | /* Add cleanups to free memory for these strings. */ | |
291 | make_cleanup (xfree, klass); | |
292 | make_cleanup (xfree, nested); | |
293 | ||
294 | /* Lookup a class named KLASS. If none is found, there is nothing | |
295 | more that can be done. */ | |
296 | klass_sym = lookup_global_symbol (klass, block, domain); | |
297 | if (klass_sym == NULL) | |
298 | { | |
299 | do_cleanups (cleanup); | |
300 | return NULL; | |
301 | } | |
302 | ||
303 | /* Look for a symbol named NESTED in this class. */ | |
304 | sym = cp_lookup_nested_symbol (SYMBOL_TYPE (klass_sym), nested, block); | |
305 | do_cleanups (cleanup); | |
306 | } | |
307 | ||
308 | return sym; | |
309 | } | |
310 | ||
aff410f1 | 311 | /* Look up NAME in the C++ namespace NAMESPACE. Other arguments are |
8dea366b | 312 | as in cp_lookup_symbol_nonlocal. If SEARCH is non-zero, search |
4186eb54 | 313 | through base classes for a matching symbol. */ |
8540c487 SW |
314 | |
315 | static struct symbol * | |
316 | cp_lookup_symbol_in_namespace (const char *namespace, | |
317 | const char *name, | |
8540c487 | 318 | const struct block *block, |
8dea366b | 319 | const domain_enum domain, int search) |
8540c487 SW |
320 | { |
321 | if (namespace[0] == '\0') | |
322 | { | |
4186eb54 | 323 | return lookup_symbol_file (name, block, domain, 0, search); |
8540c487 SW |
324 | } |
325 | else | |
326 | { | |
aff410f1 MS |
327 | char *concatenated_name = alloca (strlen (namespace) + 2 |
328 | + strlen (name) + 1); | |
c5504eaf | 329 | |
8540c487 SW |
330 | strcpy (concatenated_name, namespace); |
331 | strcat (concatenated_name, "::"); | |
332 | strcat (concatenated_name, name); | |
4186eb54 | 333 | return lookup_symbol_file (concatenated_name, block, domain, |
59da4d04 | 334 | cp_is_in_anonymous (namespace), search); |
8540c487 SW |
335 | } |
336 | } | |
337 | ||
b14e635e SW |
338 | /* Used for cleanups to reset the "searched" flag incase |
339 | of an error. */ | |
340 | ||
341 | static void | |
342 | reset_directive_searched (void *data) | |
343 | { | |
344 | struct using_direct *direct = data; | |
345 | direct->searched = 0; | |
346 | } | |
347 | ||
aff410f1 MS |
348 | /* Search for NAME by applying all import statements belonging to |
349 | BLOCK which are applicable in SCOPE. If DECLARATION_ONLY the | |
350 | search is restricted to using declarations. | |
13387711 SW |
351 | Example: |
352 | ||
aff410f1 | 353 | namespace A { |
13387711 SW |
354 | int x; |
355 | } | |
356 | using A::x; | |
357 | ||
aff410f1 MS |
358 | If SEARCH_PARENTS the search will include imports which are |
359 | applicable in parents of SCOPE. | |
b14e635e SW |
360 | Example: |
361 | ||
aff410f1 | 362 | namespace A { |
b14e635e | 363 | using namespace X; |
aff410f1 | 364 | namespace B { |
b14e635e SW |
365 | using namespace Y; |
366 | } | |
367 | } | |
368 | ||
aff410f1 MS |
369 | If SCOPE is "A::B" and SEARCH_PARENTS is true the imports of |
370 | namespaces X and Y will be considered. If SEARCH_PARENTS is false | |
371 | only the import of Y is considered. */ | |
8540c487 | 372 | |
9a80057a | 373 | static struct symbol * |
8540c487 SW |
374 | cp_lookup_symbol_imports (const char *scope, |
375 | const char *name, | |
8540c487 | 376 | const struct block *block, |
b14e635e | 377 | const domain_enum domain, |
13387711 | 378 | const int declaration_only, |
b14e635e | 379 | const int search_parents) |
8540c487 | 380 | { |
b14e635e | 381 | struct using_direct *current; |
13387711 | 382 | struct symbol *sym = NULL; |
8540c487 | 383 | int len; |
b14e635e SW |
384 | int directive_match; |
385 | struct cleanup *searched_cleanup; | |
8540c487 SW |
386 | |
387 | /* First, try to find the symbol in the given namespace. */ | |
13387711 | 388 | if (!declaration_only) |
aff410f1 | 389 | sym = cp_lookup_symbol_in_namespace (scope, name, |
8dea366b | 390 | block, domain, 1); |
13387711 | 391 | |
8540c487 SW |
392 | if (sym != NULL) |
393 | return sym; | |
394 | ||
aff410f1 MS |
395 | /* Go through the using directives. If any of them add new names to |
396 | the namespace we're searching in, see if we can find a match by | |
397 | applying them. */ | |
8540c487 SW |
398 | |
399 | for (current = block_using (block); | |
400 | current != NULL; | |
401 | current = current->next) | |
402 | { | |
32019081 JK |
403 | const char **excludep; |
404 | ||
b14e635e SW |
405 | len = strlen (current->import_dest); |
406 | directive_match = (search_parents | |
407 | ? (strncmp (scope, current->import_dest, | |
408 | strlen (current->import_dest)) == 0 | |
409 | && (len == 0 | |
aff410f1 MS |
410 | || scope[len] == ':' |
411 | || scope[len] == '\0')) | |
b14e635e | 412 | : strcmp (scope, current->import_dest) == 0); |
8540c487 | 413 | |
aff410f1 MS |
414 | /* If the import destination is the current scope or one of its |
415 | ancestors then it is applicable. */ | |
b14e635e | 416 | if (directive_match && !current->searched) |
8540c487 | 417 | { |
a1d705ee TT |
418 | /* Mark this import as searched so that the recursive call |
419 | does not search it again. */ | |
420 | current->searched = 1; | |
421 | searched_cleanup = make_cleanup (reset_directive_searched, | |
422 | current); | |
423 | ||
424 | /* If there is an import of a single declaration, compare the | |
425 | imported declaration (after optional renaming by its alias) | |
426 | with the sought out name. If there is a match pass | |
427 | current->import_src as NAMESPACE to direct the search | |
428 | towards the imported namespace. */ | |
429 | if (current->declaration | |
430 | && strcmp (name, current->alias | |
431 | ? current->alias : current->declaration) == 0) | |
432 | sym = cp_lookup_symbol_in_namespace (current->import_src, | |
433 | current->declaration, | |
8dea366b | 434 | block, domain, 1); |
a1d705ee TT |
435 | |
436 | /* If this is a DECLARATION_ONLY search or a symbol was found | |
437 | or this import statement was an import declaration, the | |
438 | search of this import is complete. */ | |
439 | if (declaration_only || sym != NULL || current->declaration) | |
440 | { | |
441 | current->searched = 0; | |
442 | discard_cleanups (searched_cleanup); | |
443 | ||
444 | if (sym != NULL) | |
445 | return sym; | |
446 | ||
447 | continue; | |
448 | } | |
449 | ||
450 | /* Do not follow CURRENT if NAME matches its EXCLUDES. */ | |
451 | for (excludep = current->excludes; *excludep; excludep++) | |
452 | if (strcmp (name, *excludep) == 0) | |
453 | break; | |
454 | if (*excludep) | |
455 | { | |
456 | discard_cleanups (searched_cleanup); | |
457 | continue; | |
458 | } | |
459 | ||
460 | if (current->alias != NULL | |
461 | && strcmp (name, current->alias) == 0) | |
462 | /* If the import is creating an alias and the alias matches | |
463 | the sought name. Pass current->import_src as the NAME to | |
464 | direct the search towards the aliased namespace. */ | |
465 | { | |
466 | sym = cp_lookup_symbol_in_namespace (scope, | |
467 | current->import_src, | |
8dea366b | 468 | block, domain, 1); |
a1d705ee TT |
469 | } |
470 | else if (current->alias == NULL) | |
471 | { | |
472 | /* If this import statement creates no alias, pass | |
473 | current->inner as NAMESPACE to direct the search | |
474 | towards the imported namespace. */ | |
475 | sym = cp_lookup_symbol_imports (current->import_src, | |
476 | name, block, | |
477 | domain, 0, 0); | |
478 | } | |
479 | current->searched = 0; | |
480 | discard_cleanups (searched_cleanup); | |
481 | ||
482 | if (sym != NULL) | |
483 | return sym; | |
8540c487 SW |
484 | } |
485 | } | |
486 | ||
487 | return NULL; | |
488 | } | |
489 | ||
34eaf542 TT |
490 | /* Helper function that searches an array of symbols for one named |
491 | NAME. */ | |
492 | ||
493 | static struct symbol * | |
aff410f1 MS |
494 | search_symbol_list (const char *name, int num, |
495 | struct symbol **syms) | |
34eaf542 TT |
496 | { |
497 | int i; | |
498 | ||
499 | /* Maybe we should store a dictionary in here instead. */ | |
500 | for (i = 0; i < num; ++i) | |
501 | { | |
502 | if (strcmp (name, SYMBOL_NATURAL_NAME (syms[i])) == 0) | |
503 | return syms[i]; | |
504 | } | |
505 | return NULL; | |
506 | } | |
507 | ||
508 | /* Like cp_lookup_symbol_imports, but if BLOCK is a function, it | |
509 | searches through the template parameters of the function and the | |
510 | function's type. */ | |
511 | ||
512 | struct symbol * | |
513 | cp_lookup_symbol_imports_or_template (const char *scope, | |
514 | const char *name, | |
515 | const struct block *block, | |
516 | const domain_enum domain) | |
517 | { | |
518 | struct symbol *function = BLOCK_FUNCTION (block); | |
519 | ||
520 | if (function != NULL && SYMBOL_LANGUAGE (function) == language_cplus) | |
521 | { | |
34eaf542 TT |
522 | /* Search the function's template parameters. */ |
523 | if (SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION (function)) | |
524 | { | |
aff410f1 MS |
525 | struct template_symbol *templ |
526 | = (struct template_symbol *) function; | |
34eaf542 TT |
527 | struct symbol *result; |
528 | ||
529 | result = search_symbol_list (name, | |
530 | templ->n_template_arguments, | |
531 | templ->template_arguments); | |
532 | if (result != NULL) | |
533 | return result; | |
534 | } | |
535 | ||
536 | /* Search the template parameters of the function's defining | |
537 | context. */ | |
538 | if (SYMBOL_NATURAL_NAME (function)) | |
539 | { | |
540 | struct type *context; | |
541 | char *name_copy = xstrdup (SYMBOL_NATURAL_NAME (function)); | |
542 | struct cleanup *cleanups = make_cleanup (xfree, name_copy); | |
543 | const struct language_defn *lang = language_def (language_cplus); | |
df6d5441 | 544 | struct gdbarch *arch |
aff08958 | 545 | = get_objfile_arch (SYMBOL_OBJFILE (function)); |
34eaf542 TT |
546 | const struct block *parent = BLOCK_SUPERBLOCK (block); |
547 | ||
548 | while (1) | |
549 | { | |
550 | struct symbol *result; | |
551 | unsigned int prefix_len = cp_entire_prefix_len (name_copy); | |
552 | ||
553 | if (prefix_len == 0) | |
554 | context = NULL; | |
555 | else | |
556 | { | |
557 | name_copy[prefix_len] = '\0'; | |
aff410f1 MS |
558 | context = lookup_typename (lang, arch, |
559 | name_copy, | |
560 | parent, 1); | |
34eaf542 TT |
561 | } |
562 | ||
563 | if (context == NULL) | |
564 | break; | |
565 | ||
aff410f1 MS |
566 | result |
567 | = search_symbol_list (name, | |
568 | TYPE_N_TEMPLATE_ARGUMENTS (context), | |
569 | TYPE_TEMPLATE_ARGUMENTS (context)); | |
34eaf542 | 570 | if (result != NULL) |
c27e16e3 TT |
571 | { |
572 | do_cleanups (cleanups); | |
573 | return result; | |
574 | } | |
34eaf542 TT |
575 | } |
576 | ||
577 | do_cleanups (cleanups); | |
578 | } | |
579 | } | |
580 | ||
581 | return cp_lookup_symbol_imports (scope, name, block, domain, 1, 1); | |
582 | } | |
583 | ||
aff410f1 MS |
584 | /* Searches for NAME in the current namespace, and by applying |
585 | relevant import statements belonging to BLOCK and its parents. | |
586 | SCOPE is the namespace scope of the context in which the search is | |
4186eb54 | 587 | being evaluated. */ |
8540c487 SW |
588 | |
589 | struct symbol* | |
590 | cp_lookup_symbol_namespace (const char *scope, | |
591 | const char *name, | |
8540c487 | 592 | const struct block *block, |
13387711 | 593 | const domain_enum domain) |
8540c487 SW |
594 | { |
595 | struct symbol *sym; | |
13387711 SW |
596 | |
597 | /* First, try to find the symbol in the given namespace. */ | |
aff410f1 | 598 | sym = cp_lookup_symbol_in_namespace (scope, name, |
8dea366b | 599 | block, domain, 1); |
13387711 SW |
600 | if (sym != NULL) |
601 | return sym; | |
8540c487 | 602 | |
aff410f1 MS |
603 | /* Search for name in namespaces imported to this and parent |
604 | blocks. */ | |
8540c487 SW |
605 | while (block != NULL) |
606 | { | |
aff410f1 MS |
607 | sym = cp_lookup_symbol_imports (scope, name, block, |
608 | domain, 0, 1); | |
8540c487 SW |
609 | |
610 | if (sym) | |
611 | return sym; | |
612 | ||
613 | block = BLOCK_SUPERBLOCK (block); | |
614 | } | |
615 | ||
616 | return NULL; | |
1fcb5155 DC |
617 | } |
618 | ||
619 | /* Lookup NAME at namespace scope (or, in C terms, in static and | |
620 | global variables). SCOPE is the namespace that the current | |
621 | function is defined within; only consider namespaces whose length | |
622 | is at least SCOPE_LEN. Other arguments are as in | |
623 | cp_lookup_symbol_nonlocal. | |
624 | ||
625 | For example, if we're within a function A::B::f and looking for a | |
3882f37a | 626 | symbol x, this will get called with NAME = "x", SCOPE = "A::B", and |
1fcb5155 DC |
627 | SCOPE_LEN = 0. It then calls itself with NAME and SCOPE the same, |
628 | but with SCOPE_LEN = 1. And then it calls itself with NAME and | |
629 | SCOPE the same, but with SCOPE_LEN = 4. This third call looks for | |
630 | "A::B::x"; if it doesn't find it, then the second call looks for | |
631 | "A::x", and if that call fails, then the first call looks for | |
632 | "x". */ | |
633 | ||
634 | static struct symbol * | |
635 | lookup_namespace_scope (const char *name, | |
1fcb5155 DC |
636 | const struct block *block, |
637 | const domain_enum domain, | |
1fcb5155 DC |
638 | const char *scope, |
639 | int scope_len) | |
640 | { | |
641 | char *namespace; | |
642 | ||
643 | if (scope[scope_len] != '\0') | |
644 | { | |
645 | /* Recursively search for names in child namespaces first. */ | |
646 | ||
647 | struct symbol *sym; | |
648 | int new_scope_len = scope_len; | |
649 | ||
650 | /* If the current scope is followed by "::", skip past that. */ | |
651 | if (new_scope_len != 0) | |
652 | { | |
653 | gdb_assert (scope[new_scope_len] == ':'); | |
654 | new_scope_len += 2; | |
655 | } | |
656 | new_scope_len += cp_find_first_component (scope + new_scope_len); | |
aff410f1 MS |
657 | sym = lookup_namespace_scope (name, block, domain, |
658 | scope, new_scope_len); | |
1fcb5155 DC |
659 | if (sym != NULL) |
660 | return sym; | |
661 | } | |
662 | ||
663 | /* Okay, we didn't find a match in our children, so look for the | |
664 | name in the current namespace. */ | |
665 | ||
666 | namespace = alloca (scope_len + 1); | |
667 | strncpy (namespace, scope, scope_len); | |
668 | namespace[scope_len] = '\0'; | |
aff410f1 | 669 | return cp_lookup_symbol_in_namespace (namespace, name, |
8dea366b | 670 | block, domain, 1); |
1fcb5155 DC |
671 | } |
672 | ||
56286edf DE |
673 | /* The C++-specific version of name lookup for static and global |
674 | names. This makes sure that names get looked for in all namespaces | |
675 | that are in scope. NAME is the natural name of the symbol that | |
676 | we're looking for, BLOCK is the block that we're searching within, | |
677 | DOMAIN says what kind of symbols we're looking for. */ | |
678 | ||
679 | struct symbol * | |
680 | cp_lookup_symbol_nonlocal (const char *name, | |
681 | const struct block *block, | |
682 | const domain_enum domain) | |
683 | { | |
684 | struct symbol *sym; | |
685 | const char *scope = block_scope (block); | |
686 | ||
687 | sym = lookup_namespace_scope (name, block, | |
688 | domain, scope, 0); | |
689 | if (sym != NULL) | |
690 | return sym; | |
691 | ||
692 | return cp_lookup_symbol_namespace (scope, name, | |
693 | block, domain); | |
694 | } | |
695 | ||
f7e3ecae KS |
696 | /* Search through the base classes of PARENT_TYPE for a base class |
697 | named NAME and return its type. If not found, return NULL. */ | |
698 | ||
699 | struct type * | |
a07e3e18 | 700 | cp_find_type_baseclass_by_name (struct type *parent_type, const char *name) |
f7e3ecae KS |
701 | { |
702 | int i; | |
703 | ||
704 | CHECK_TYPEDEF (parent_type); | |
705 | for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i) | |
706 | { | |
707 | struct type *type = check_typedef (TYPE_BASECLASS (parent_type, i)); | |
708 | const char *base_name = TYPE_BASECLASS_NAME (parent_type, i); | |
709 | ||
710 | if (base_name == NULL) | |
711 | continue; | |
712 | ||
713 | if (streq (base_name, name)) | |
714 | return type; | |
715 | ||
a07e3e18 | 716 | type = cp_find_type_baseclass_by_name (type, name); |
f7e3ecae KS |
717 | if (type != NULL) |
718 | return type; | |
719 | } | |
720 | ||
721 | return NULL; | |
722 | } | |
723 | ||
8dea366b KS |
724 | /* Search through the base classes of PARENT_TYPE for a symbol named |
725 | NAME in block BLOCK. */ | |
726 | ||
727 | static struct symbol * | |
728 | find_symbol_in_baseclass (struct type *parent_type, const char *name, | |
729 | const struct block *block) | |
730 | { | |
731 | int i; | |
732 | struct symbol *sym; | |
733 | struct cleanup *cleanup; | |
734 | char *concatenated_name; | |
735 | ||
736 | sym = NULL; | |
737 | concatenated_name = NULL; | |
738 | cleanup = make_cleanup (free_current_contents, &concatenated_name); | |
739 | for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i) | |
740 | { | |
741 | size_t len; | |
69fc87c2 | 742 | struct type *base_type = TYPE_BASECLASS (parent_type, i); |
8dea366b KS |
743 | const char *base_name = TYPE_BASECLASS_NAME (parent_type, i); |
744 | ||
745 | if (base_name == NULL) | |
746 | continue; | |
747 | ||
748 | /* Search this particular base class. */ | |
69fc87c2 DE |
749 | sym = cp_lookup_symbol_in_namespace (base_name, name, block, |
750 | VAR_DOMAIN, 0); | |
8dea366b KS |
751 | if (sym != NULL) |
752 | break; | |
753 | ||
69fc87c2 DE |
754 | /* Now search all static file-level symbols. We have to do this for |
755 | things like typedefs in the class. First search in this symtab, | |
756 | what we want is possibly there. */ | |
8dea366b KS |
757 | len = strlen (base_name) + 2 + strlen (name) + 1; |
758 | concatenated_name = xrealloc (concatenated_name, len); | |
759 | xsnprintf (concatenated_name, len, "%s::%s", base_name, name); | |
24d864bb DE |
760 | sym = lookup_symbol_in_static_block (concatenated_name, block, |
761 | VAR_DOMAIN); | |
69fc87c2 DE |
762 | if (sym != NULL) |
763 | break; | |
8dea366b | 764 | |
69fc87c2 DE |
765 | /* Nope. We now have to search all static blocks in all objfiles, |
766 | even if block != NULL, because there's no guarantees as to which | |
767 | symtab the symbol we want is in. */ | |
24d864bb | 768 | sym = lookup_static_symbol (concatenated_name, VAR_DOMAIN); |
69fc87c2 DE |
769 | if (sym != NULL) |
770 | break; | |
8dea366b KS |
771 | |
772 | /* If this class has base classes, search them next. */ | |
69fc87c2 DE |
773 | CHECK_TYPEDEF (base_type); |
774 | if (TYPE_N_BASECLASSES (base_type) > 0) | |
8dea366b | 775 | { |
69fc87c2 | 776 | sym = find_symbol_in_baseclass (base_type, name, block); |
8dea366b KS |
777 | if (sym != NULL) |
778 | break; | |
779 | } | |
780 | } | |
781 | ||
782 | do_cleanups (cleanup); | |
0c2e6019 | 783 | return sym; |
5c4e30ca DC |
784 | } |
785 | ||
50af5481 | 786 | /* Look up a symbol named NESTED_NAME that is nested inside the C++ |
79c2c32d | 787 | class or namespace given by PARENT_TYPE, from within the context |
05a6c3c8 | 788 | given by BLOCK. Return NULL if there is no such nested symbol. */ |
79c2c32d | 789 | |
50af5481 JK |
790 | struct symbol * |
791 | cp_lookup_nested_symbol (struct type *parent_type, | |
792 | const char *nested_name, | |
793 | const struct block *block) | |
79c2c32d | 794 | { |
05a6c3c8 | 795 | /* type_name_no_tag_or_error provides better error reporting using the |
d8228535 JK |
796 | original type. */ |
797 | struct type *saved_parent_type = parent_type; | |
798 | ||
799 | CHECK_TYPEDEF (parent_type); | |
800 | ||
79c2c32d DC |
801 | switch (TYPE_CODE (parent_type)) |
802 | { | |
63d06c5c | 803 | case TYPE_CODE_STRUCT: |
79c2c32d | 804 | case TYPE_CODE_NAMESPACE: |
48e32051 | 805 | case TYPE_CODE_UNION: |
3d567982 | 806 | case TYPE_CODE_ENUM: |
530e8392 KB |
807 | /* NOTE: Handle modules here as well, because Fortran is re-using the C++ |
808 | specific code to lookup nested symbols in modules, by calling the | |
809 | function pointer la_lookup_symbol_nonlocal, which ends up here. */ | |
810 | case TYPE_CODE_MODULE: | |
79c2c32d | 811 | { |
63d06c5c DC |
812 | /* NOTE: carlton/2003-11-10: We don't treat C++ class members |
813 | of classes like, say, data or function members. Instead, | |
814 | they're just represented by symbols whose names are | |
815 | qualified by the name of the surrounding class. This is | |
816 | just like members of namespaces; in particular, | |
817 | lookup_symbol_namespace works when looking them up. */ | |
818 | ||
08850b56 | 819 | int size; |
d8228535 | 820 | const char *parent_name = type_name_no_tag_or_error (saved_parent_type); |
aff410f1 MS |
821 | struct symbol *sym |
822 | = cp_lookup_symbol_in_namespace (parent_name, nested_name, | |
8dea366b | 823 | block, VAR_DOMAIN, 0); |
41f62f39 | 824 | char *concatenated_name; |
c5504eaf | 825 | |
50af5481 JK |
826 | if (sym != NULL) |
827 | return sym; | |
41f62f39 | 828 | |
69fc87c2 DE |
829 | /* Now search all static file-level symbols. We have to do this |
830 | for things like typedefs in the class. We do not try to | |
aff410f1 | 831 | guess any imported namespace as even the fully specified |
8dea366b | 832 | namespace search is already not C++ compliant and more |
aff410f1 | 833 | assumptions could make it too magic. */ |
41f62f39 | 834 | |
08850b56 PM |
835 | size = strlen (parent_name) + 2 + strlen (nested_name) + 1; |
836 | concatenated_name = alloca (size); | |
837 | xsnprintf (concatenated_name, size, "%s::%s", | |
aff410f1 | 838 | parent_name, nested_name); |
24d864bb | 839 | sym = lookup_static_symbol (concatenated_name, VAR_DOMAIN); |
50af5481 JK |
840 | if (sym != NULL) |
841 | return sym; | |
41f62f39 | 842 | |
8dea366b KS |
843 | /* If no matching symbols were found, try searching any |
844 | base classes. */ | |
845 | return find_symbol_in_baseclass (parent_type, nested_name, block); | |
79c2c32d | 846 | } |
bb869963 SDJ |
847 | |
848 | case TYPE_CODE_FUNC: | |
849 | case TYPE_CODE_METHOD: | |
850 | return NULL; | |
851 | ||
79c2c32d DC |
852 | default: |
853 | internal_error (__FILE__, __LINE__, | |
50af5481 | 854 | _("cp_lookup_nested_symbol called " |
3e43a32a | 855 | "on a non-aggregate type.")); |
79c2c32d DC |
856 | } |
857 | } | |
858 | ||
b368761e DC |
859 | /* The C++-version of lookup_transparent_type. */ |
860 | ||
861 | /* FIXME: carlton/2004-01-16: The problem that this is trying to | |
862 | address is that, unfortunately, sometimes NAME is wrong: it may not | |
863 | include the name of namespaces enclosing the type in question. | |
b021a221 | 864 | lookup_transparent_type gets called when the type in question |
b368761e DC |
865 | is a declaration, and we're trying to find its definition; but, for |
866 | declarations, our type name deduction mechanism doesn't work. | |
867 | There's nothing we can do to fix this in general, I think, in the | |
868 | absence of debug information about namespaces (I've filed PR | |
869 | gdb/1511 about this); until such debug information becomes more | |
870 | prevalent, one heuristic which sometimes looks is to search for the | |
871 | definition in namespaces containing the current namespace. | |
872 | ||
873 | We should delete this functions once the appropriate debug | |
874 | information becomes more widespread. (GCC 3.4 will be the first | |
875 | released version of GCC with such information.) */ | |
876 | ||
877 | struct type * | |
878 | cp_lookup_transparent_type (const char *name) | |
879 | { | |
880 | /* First, try the honest way of looking up the definition. */ | |
881 | struct type *t = basic_lookup_transparent_type (name); | |
882 | const char *scope; | |
883 | ||
884 | if (t != NULL) | |
885 | return t; | |
886 | ||
887 | /* If that doesn't work and we're within a namespace, look there | |
888 | instead. */ | |
889 | scope = block_scope (get_selected_block (0)); | |
890 | ||
891 | if (scope[0] == '\0') | |
892 | return NULL; | |
893 | ||
894 | return cp_lookup_transparent_type_loop (name, scope, 0); | |
895 | } | |
896 | ||
b021a221 MS |
897 | /* Lookup the type definition associated to NAME in namespaces/classes |
898 | containing SCOPE whose name is strictly longer than LENGTH. LENGTH | |
899 | must be the index of the start of a component of SCOPE. */ | |
b368761e DC |
900 | |
901 | static struct type * | |
aff410f1 MS |
902 | cp_lookup_transparent_type_loop (const char *name, |
903 | const char *scope, | |
b368761e DC |
904 | int length) |
905 | { | |
1198ecbe | 906 | int scope_length = length + cp_find_first_component (scope + length); |
b368761e DC |
907 | char *full_name; |
908 | ||
909 | /* If the current scope is followed by "::", look in the next | |
910 | component. */ | |
911 | if (scope[scope_length] == ':') | |
912 | { | |
913 | struct type *retval | |
aff410f1 MS |
914 | = cp_lookup_transparent_type_loop (name, scope, |
915 | scope_length + 2); | |
c5504eaf | 916 | |
b368761e DC |
917 | if (retval != NULL) |
918 | return retval; | |
919 | } | |
920 | ||
921 | full_name = alloca (scope_length + 2 + strlen (name) + 1); | |
922 | strncpy (full_name, scope, scope_length); | |
923 | strncpy (full_name + scope_length, "::", 2); | |
924 | strcpy (full_name + scope_length + 2, name); | |
925 | ||
926 | return basic_lookup_transparent_type (full_name); | |
927 | } | |
928 | ||
0c2e6019 TT |
929 | /* This used to do something but was removed when it became |
930 | obsolete. */ | |
5c4e30ca DC |
931 | |
932 | static void | |
933 | maintenance_cplus_namespace (char *args, int from_tty) | |
934 | { | |
0c2e6019 | 935 | printf_unfiltered (_("The `maint namespace' command was removed.\n")); |
5c4e30ca DC |
936 | } |
937 | ||
2c0b251b PA |
938 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
939 | extern initialize_file_ftype _initialize_cp_namespace; | |
940 | ||
5c4e30ca DC |
941 | void |
942 | _initialize_cp_namespace (void) | |
943 | { | |
0c2e6019 TT |
944 | struct cmd_list_element *cmd; |
945 | ||
946 | cmd = add_cmd ("namespace", class_maintenance, | |
947 | maintenance_cplus_namespace, | |
948 | _("Deprecated placeholder for removed functionality."), | |
949 | &maint_cplus_cmd_list); | |
950 | deprecate_cmd (cmd, NULL); | |
1fcb5155 | 951 | } |