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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" | |
26 | #include "gdb_assert.h" | |
27 | #include "block.h" | |
5c4e30ca DC |
28 | #include "objfiles.h" |
29 | #include "gdbtypes.h" | |
30 | #include "dictionary.h" | |
31 | #include "command.h" | |
b368761e | 32 | #include "frame.h" |
27aa8d6a | 33 | #include "buildsym.h" |
34eaf542 | 34 | #include "language.h" |
9219021c | 35 | |
1fcb5155 | 36 | static struct symbol *lookup_namespace_scope (const char *name, |
1fcb5155 DC |
37 | const struct block *block, |
38 | const domain_enum domain, | |
1fcb5155 DC |
39 | const char *scope, |
40 | int scope_len); | |
41 | ||
42 | static struct symbol *lookup_symbol_file (const char *name, | |
1fcb5155 DC |
43 | const struct block *block, |
44 | const domain_enum domain, | |
8dea366b KS |
45 | int anonymous_namespace, |
46 | int search); | |
1fcb5155 | 47 | |
b368761e DC |
48 | static struct type *cp_lookup_transparent_type_loop (const char *name, |
49 | const char *scope, | |
50 | int scope_len); | |
51 | ||
9219021c DC |
52 | /* Check to see if SYMBOL refers to an object contained within an |
53 | anonymous namespace; if so, add an appropriate using directive. */ | |
54 | ||
9219021c | 55 | void |
a10964d1 AR |
56 | cp_scan_for_anonymous_namespaces (const struct symbol *const symbol, |
57 | struct objfile *const objfile) | |
9219021c | 58 | { |
df8a16a1 | 59 | if (SYMBOL_DEMANGLED_NAME (symbol) != NULL) |
9219021c | 60 | { |
df8a16a1 | 61 | const char *name = SYMBOL_DEMANGLED_NAME (symbol); |
9219021c DC |
62 | unsigned int previous_component; |
63 | unsigned int next_component; | |
9219021c DC |
64 | |
65 | /* Start with a quick-and-dirty check for mention of "(anonymous | |
66 | namespace)". */ | |
67 | ||
68 | if (!cp_is_anonymous (name)) | |
69 | return; | |
70 | ||
71 | previous_component = 0; | |
72 | next_component = cp_find_first_component (name + previous_component); | |
73 | ||
74 | while (name[next_component] == ':') | |
75 | { | |
2b1dbab0 KS |
76 | if (((next_component - previous_component) |
77 | == CP_ANONYMOUS_NAMESPACE_LEN) | |
9219021c | 78 | && strncmp (name + previous_component, |
2b1dbab0 KS |
79 | CP_ANONYMOUS_NAMESPACE_STR, |
80 | CP_ANONYMOUS_NAMESPACE_LEN) == 0) | |
9219021c | 81 | { |
aff410f1 MS |
82 | int dest_len = (previous_component == 0 |
83 | ? 0 : previous_component - 2); | |
8c902bb1 | 84 | int src_len = next_component; |
794684b6 | 85 | |
8c902bb1 SW |
86 | char *dest = alloca (dest_len + 1); |
87 | char *src = alloca (src_len + 1); | |
794684b6 | 88 | |
8c902bb1 SW |
89 | memcpy (dest, name, dest_len); |
90 | memcpy (src, name, src_len); | |
794684b6 | 91 | |
8c902bb1 SW |
92 | dest[dest_len] = '\0'; |
93 | src[src_len] = '\0'; | |
794684b6 | 94 | |
9219021c DC |
95 | /* We've found a component of the name that's an |
96 | anonymous namespace. So add symbols in it to the | |
97 | namespace given by the previous component if there is | |
98 | one, or to the global namespace if there isn't. */ | |
12aaed36 | 99 | cp_add_using_directive (dest, src, NULL, NULL, NULL, 1, |
a10964d1 | 100 | &objfile->objfile_obstack); |
9219021c DC |
101 | } |
102 | /* The "+ 2" is for the "::". */ | |
103 | previous_component = next_component + 2; | |
104 | next_component = (previous_component | |
105 | + cp_find_first_component (name | |
106 | + previous_component)); | |
107 | } | |
108 | } | |
109 | } | |
110 | ||
c0cc3a76 | 111 | |
aff410f1 MS |
112 | /* Add a using directive to using_directives. If the using directive |
113 | in question has already been added, don't add it twice. | |
114 | ||
115 | Create a new struct using_direct which imports the namespace SRC | |
116 | into the scope DEST. ALIAS is the name of the imported namespace | |
117 | in the current scope. If ALIAS is NULL then the namespace is known | |
118 | by its original name. DECLARATION is the name if the imported | |
119 | varable if this is a declaration import (Eg. using A::x), otherwise | |
12aaed36 TT |
120 | it is NULL. EXCLUDES is a list of names not to import from an |
121 | imported module or NULL. If COPY_NAMES is non-zero, then the | |
122 | arguments are copied into newly allocated memory so they can be | |
123 | temporaries. For EXCLUDES the VEC pointers are copied but the | |
32019081 | 124 | pointed to characters are not copied. */ |
9219021c DC |
125 | |
126 | void | |
13387711 SW |
127 | cp_add_using_directive (const char *dest, |
128 | const char *src, | |
129 | const char *alias, | |
130 | const char *declaration, | |
32019081 | 131 | VEC (const_char_ptr) *excludes, |
12aaed36 | 132 | int copy_names, |
c0cc3a76 | 133 | struct obstack *obstack) |
9219021c DC |
134 | { |
135 | struct using_direct *current; | |
136 | struct using_direct *new; | |
13387711 | 137 | |
9219021c DC |
138 | /* Has it already been added? */ |
139 | ||
27aa8d6a | 140 | for (current = using_directives; current != NULL; current = current->next) |
9219021c | 141 | { |
32019081 JK |
142 | int ix; |
143 | const char *param; | |
144 | ||
70c622a3 JK |
145 | if (strcmp (current->import_src, src) != 0) |
146 | continue; | |
147 | if (strcmp (current->import_dest, dest) != 0) | |
148 | continue; | |
149 | if ((alias == NULL && current->alias != NULL) | |
150 | || (alias != NULL && current->alias == NULL) | |
151 | || (alias != NULL && current->alias != NULL | |
152 | && strcmp (alias, current->alias) != 0)) | |
153 | continue; | |
154 | if ((declaration == NULL && current->declaration != NULL) | |
155 | || (declaration != NULL && current->declaration == NULL) | |
156 | || (declaration != NULL && current->declaration != NULL | |
157 | && strcmp (declaration, current->declaration) != 0)) | |
158 | continue; | |
159 | ||
32019081 JK |
160 | /* Compare the contents of EXCLUDES. */ |
161 | for (ix = 0; VEC_iterate (const_char_ptr, excludes, ix, param); ix++) | |
162 | if (current->excludes[ix] == NULL | |
163 | || strcmp (param, current->excludes[ix]) != 0) | |
164 | break; | |
165 | if (ix < VEC_length (const_char_ptr, excludes) | |
166 | || current->excludes[ix] != NULL) | |
167 | continue; | |
168 | ||
70c622a3 JK |
169 | /* Parameters exactly match CURRENT. */ |
170 | return; | |
9219021c DC |
171 | } |
172 | ||
32019081 JK |
173 | new = obstack_alloc (obstack, (sizeof (*new) |
174 | + (VEC_length (const_char_ptr, excludes) | |
175 | * sizeof (*new->excludes)))); | |
176 | memset (new, 0, sizeof (*new)); | |
c0cc3a76 | 177 | |
12aaed36 TT |
178 | if (copy_names) |
179 | { | |
180 | new->import_src = obstack_copy0 (obstack, src, strlen (src)); | |
181 | new->import_dest = obstack_copy0 (obstack, dest, strlen (dest)); | |
182 | } | |
183 | else | |
184 | { | |
185 | new->import_src = src; | |
186 | new->import_dest = dest; | |
187 | } | |
794684b6 | 188 | |
12aaed36 | 189 | if (alias != NULL && copy_names) |
10f0c4bb | 190 | new->alias = obstack_copy0 (obstack, alias, strlen (alias)); |
12aaed36 TT |
191 | else |
192 | new->alias = alias; | |
c0cc3a76 | 193 | |
12aaed36 | 194 | if (declaration != NULL && copy_names) |
10f0c4bb TT |
195 | new->declaration = obstack_copy0 (obstack, |
196 | declaration, strlen (declaration)); | |
12aaed36 TT |
197 | else |
198 | new->declaration = declaration; | |
13387711 | 199 | |
32019081 JK |
200 | memcpy (new->excludes, VEC_address (const_char_ptr, excludes), |
201 | VEC_length (const_char_ptr, excludes) * sizeof (*new->excludes)); | |
202 | new->excludes[VEC_length (const_char_ptr, excludes)] = NULL; | |
203 | ||
c0cc3a76 SW |
204 | new->next = using_directives; |
205 | using_directives = new; | |
9219021c DC |
206 | } |
207 | ||
9219021c DC |
208 | /* Test whether or not NAMESPACE looks like it mentions an anonymous |
209 | namespace; return nonzero if so. */ | |
210 | ||
211 | int | |
212 | cp_is_anonymous (const char *namespace) | |
213 | { | |
2b1dbab0 | 214 | return (strstr (namespace, CP_ANONYMOUS_NAMESPACE_STR) |
9219021c DC |
215 | != NULL); |
216 | } | |
217 | ||
1fcb5155 DC |
218 | /* The C++-specific version of name lookup for static and global |
219 | names. This makes sure that names get looked for in all namespaces | |
220 | that are in scope. NAME is the natural name of the symbol that | |
94af9270 | 221 | we're looking for, BLOCK is the block that we're searching within, |
aff410f1 MS |
222 | DOMAIN says what kind of symbols we're looking for, and if SYMTAB |
223 | is non-NULL, we should store the symtab where we found the symbol | |
224 | in it. */ | |
1fcb5155 DC |
225 | |
226 | struct symbol * | |
227 | cp_lookup_symbol_nonlocal (const char *name, | |
1fcb5155 | 228 | const struct block *block, |
21b556f4 | 229 | const domain_enum domain) |
1fcb5155 | 230 | { |
8540c487 SW |
231 | struct symbol *sym; |
232 | const char *scope = block_scope (block); | |
233 | ||
aff410f1 MS |
234 | sym = lookup_namespace_scope (name, block, |
235 | domain, scope, 0); | |
8540c487 SW |
236 | if (sym != NULL) |
237 | return sym; | |
238 | ||
aff410f1 MS |
239 | return cp_lookup_symbol_namespace (scope, name, |
240 | block, domain); | |
8540c487 SW |
241 | } |
242 | ||
aff410f1 | 243 | /* Look up NAME in the C++ namespace NAMESPACE. Other arguments are |
8dea366b KS |
244 | as in cp_lookup_symbol_nonlocal. If SEARCH is non-zero, search |
245 | through base classes for a matching symbol. */ | |
8540c487 SW |
246 | |
247 | static struct symbol * | |
248 | cp_lookup_symbol_in_namespace (const char *namespace, | |
249 | const char *name, | |
8540c487 | 250 | const struct block *block, |
8dea366b | 251 | const domain_enum domain, int search) |
8540c487 SW |
252 | { |
253 | if (namespace[0] == '\0') | |
254 | { | |
8dea366b | 255 | return lookup_symbol_file (name, block, domain, 0, search); |
8540c487 SW |
256 | } |
257 | else | |
258 | { | |
aff410f1 MS |
259 | char *concatenated_name = alloca (strlen (namespace) + 2 |
260 | + strlen (name) + 1); | |
c5504eaf | 261 | |
8540c487 SW |
262 | strcpy (concatenated_name, namespace); |
263 | strcat (concatenated_name, "::"); | |
264 | strcat (concatenated_name, name); | |
aff410f1 | 265 | return lookup_symbol_file (concatenated_name, block, domain, |
8dea366b | 266 | cp_is_anonymous (namespace), search); |
8540c487 SW |
267 | } |
268 | } | |
269 | ||
b14e635e SW |
270 | /* Used for cleanups to reset the "searched" flag incase |
271 | of an error. */ | |
272 | ||
273 | static void | |
274 | reset_directive_searched (void *data) | |
275 | { | |
276 | struct using_direct *direct = data; | |
277 | direct->searched = 0; | |
278 | } | |
279 | ||
aff410f1 MS |
280 | /* Search for NAME by applying all import statements belonging to |
281 | BLOCK which are applicable in SCOPE. If DECLARATION_ONLY the | |
282 | search is restricted to using declarations. | |
13387711 SW |
283 | Example: |
284 | ||
aff410f1 | 285 | namespace A { |
13387711 SW |
286 | int x; |
287 | } | |
288 | using A::x; | |
289 | ||
aff410f1 MS |
290 | If SEARCH_PARENTS the search will include imports which are |
291 | applicable in parents of SCOPE. | |
b14e635e SW |
292 | Example: |
293 | ||
aff410f1 | 294 | namespace A { |
b14e635e | 295 | using namespace X; |
aff410f1 | 296 | namespace B { |
b14e635e SW |
297 | using namespace Y; |
298 | } | |
299 | } | |
300 | ||
aff410f1 MS |
301 | If SCOPE is "A::B" and SEARCH_PARENTS is true the imports of |
302 | namespaces X and Y will be considered. If SEARCH_PARENTS is false | |
303 | only the import of Y is considered. */ | |
8540c487 | 304 | |
13387711 | 305 | struct symbol * |
8540c487 SW |
306 | cp_lookup_symbol_imports (const char *scope, |
307 | const char *name, | |
8540c487 | 308 | const struct block *block, |
b14e635e | 309 | const domain_enum domain, |
13387711 | 310 | const int declaration_only, |
b14e635e | 311 | const int search_parents) |
8540c487 | 312 | { |
b14e635e | 313 | struct using_direct *current; |
13387711 | 314 | struct symbol *sym = NULL; |
8540c487 | 315 | int len; |
b14e635e SW |
316 | int directive_match; |
317 | struct cleanup *searched_cleanup; | |
8540c487 SW |
318 | |
319 | /* First, try to find the symbol in the given namespace. */ | |
13387711 | 320 | if (!declaration_only) |
aff410f1 | 321 | sym = cp_lookup_symbol_in_namespace (scope, name, |
8dea366b | 322 | block, domain, 1); |
13387711 | 323 | |
8540c487 SW |
324 | if (sym != NULL) |
325 | return sym; | |
326 | ||
aff410f1 MS |
327 | /* Go through the using directives. If any of them add new names to |
328 | the namespace we're searching in, see if we can find a match by | |
329 | applying them. */ | |
8540c487 SW |
330 | |
331 | for (current = block_using (block); | |
332 | current != NULL; | |
333 | current = current->next) | |
334 | { | |
32019081 JK |
335 | const char **excludep; |
336 | ||
b14e635e SW |
337 | len = strlen (current->import_dest); |
338 | directive_match = (search_parents | |
339 | ? (strncmp (scope, current->import_dest, | |
340 | strlen (current->import_dest)) == 0 | |
341 | && (len == 0 | |
aff410f1 MS |
342 | || scope[len] == ':' |
343 | || scope[len] == '\0')) | |
b14e635e | 344 | : strcmp (scope, current->import_dest) == 0); |
8540c487 | 345 | |
aff410f1 MS |
346 | /* If the import destination is the current scope or one of its |
347 | ancestors then it is applicable. */ | |
b14e635e | 348 | if (directive_match && !current->searched) |
8540c487 | 349 | { |
a1d705ee TT |
350 | /* Mark this import as searched so that the recursive call |
351 | does not search it again. */ | |
352 | current->searched = 1; | |
353 | searched_cleanup = make_cleanup (reset_directive_searched, | |
354 | current); | |
355 | ||
356 | /* If there is an import of a single declaration, compare the | |
357 | imported declaration (after optional renaming by its alias) | |
358 | with the sought out name. If there is a match pass | |
359 | current->import_src as NAMESPACE to direct the search | |
360 | towards the imported namespace. */ | |
361 | if (current->declaration | |
362 | && strcmp (name, current->alias | |
363 | ? current->alias : current->declaration) == 0) | |
364 | sym = cp_lookup_symbol_in_namespace (current->import_src, | |
365 | current->declaration, | |
8dea366b | 366 | block, domain, 1); |
a1d705ee TT |
367 | |
368 | /* If this is a DECLARATION_ONLY search or a symbol was found | |
369 | or this import statement was an import declaration, the | |
370 | search of this import is complete. */ | |
371 | if (declaration_only || sym != NULL || current->declaration) | |
372 | { | |
373 | current->searched = 0; | |
374 | discard_cleanups (searched_cleanup); | |
375 | ||
376 | if (sym != NULL) | |
377 | return sym; | |
378 | ||
379 | continue; | |
380 | } | |
381 | ||
382 | /* Do not follow CURRENT if NAME matches its EXCLUDES. */ | |
383 | for (excludep = current->excludes; *excludep; excludep++) | |
384 | if (strcmp (name, *excludep) == 0) | |
385 | break; | |
386 | if (*excludep) | |
387 | { | |
388 | discard_cleanups (searched_cleanup); | |
389 | continue; | |
390 | } | |
391 | ||
392 | if (current->alias != NULL | |
393 | && strcmp (name, current->alias) == 0) | |
394 | /* If the import is creating an alias and the alias matches | |
395 | the sought name. Pass current->import_src as the NAME to | |
396 | direct the search towards the aliased namespace. */ | |
397 | { | |
398 | sym = cp_lookup_symbol_in_namespace (scope, | |
399 | current->import_src, | |
8dea366b | 400 | block, domain, 1); |
a1d705ee TT |
401 | } |
402 | else if (current->alias == NULL) | |
403 | { | |
404 | /* If this import statement creates no alias, pass | |
405 | current->inner as NAMESPACE to direct the search | |
406 | towards the imported namespace. */ | |
407 | sym = cp_lookup_symbol_imports (current->import_src, | |
408 | name, block, | |
409 | domain, 0, 0); | |
410 | } | |
411 | current->searched = 0; | |
412 | discard_cleanups (searched_cleanup); | |
413 | ||
414 | if (sym != NULL) | |
415 | return sym; | |
8540c487 SW |
416 | } |
417 | } | |
418 | ||
419 | return NULL; | |
420 | } | |
421 | ||
34eaf542 TT |
422 | /* Helper function that searches an array of symbols for one named |
423 | NAME. */ | |
424 | ||
425 | static struct symbol * | |
aff410f1 MS |
426 | search_symbol_list (const char *name, int num, |
427 | struct symbol **syms) | |
34eaf542 TT |
428 | { |
429 | int i; | |
430 | ||
431 | /* Maybe we should store a dictionary in here instead. */ | |
432 | for (i = 0; i < num; ++i) | |
433 | { | |
434 | if (strcmp (name, SYMBOL_NATURAL_NAME (syms[i])) == 0) | |
435 | return syms[i]; | |
436 | } | |
437 | return NULL; | |
438 | } | |
439 | ||
440 | /* Like cp_lookup_symbol_imports, but if BLOCK is a function, it | |
441 | searches through the template parameters of the function and the | |
442 | function's type. */ | |
443 | ||
444 | struct symbol * | |
445 | cp_lookup_symbol_imports_or_template (const char *scope, | |
446 | const char *name, | |
447 | const struct block *block, | |
448 | const domain_enum domain) | |
449 | { | |
450 | struct symbol *function = BLOCK_FUNCTION (block); | |
451 | ||
452 | if (function != NULL && SYMBOL_LANGUAGE (function) == language_cplus) | |
453 | { | |
34eaf542 TT |
454 | /* Search the function's template parameters. */ |
455 | if (SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION (function)) | |
456 | { | |
aff410f1 MS |
457 | struct template_symbol *templ |
458 | = (struct template_symbol *) function; | |
34eaf542 TT |
459 | struct symbol *result; |
460 | ||
461 | result = search_symbol_list (name, | |
462 | templ->n_template_arguments, | |
463 | templ->template_arguments); | |
464 | if (result != NULL) | |
465 | return result; | |
466 | } | |
467 | ||
468 | /* Search the template parameters of the function's defining | |
469 | context. */ | |
470 | if (SYMBOL_NATURAL_NAME (function)) | |
471 | { | |
472 | struct type *context; | |
473 | char *name_copy = xstrdup (SYMBOL_NATURAL_NAME (function)); | |
474 | struct cleanup *cleanups = make_cleanup (xfree, name_copy); | |
475 | const struct language_defn *lang = language_def (language_cplus); | |
df6d5441 TT |
476 | struct gdbarch *arch |
477 | = get_objfile_arch (SYMBOL_SYMTAB (function)->objfile); | |
34eaf542 TT |
478 | const struct block *parent = BLOCK_SUPERBLOCK (block); |
479 | ||
480 | while (1) | |
481 | { | |
482 | struct symbol *result; | |
483 | unsigned int prefix_len = cp_entire_prefix_len (name_copy); | |
484 | ||
485 | if (prefix_len == 0) | |
486 | context = NULL; | |
487 | else | |
488 | { | |
489 | name_copy[prefix_len] = '\0'; | |
aff410f1 MS |
490 | context = lookup_typename (lang, arch, |
491 | name_copy, | |
492 | parent, 1); | |
34eaf542 TT |
493 | } |
494 | ||
495 | if (context == NULL) | |
496 | break; | |
497 | ||
aff410f1 MS |
498 | result |
499 | = search_symbol_list (name, | |
500 | TYPE_N_TEMPLATE_ARGUMENTS (context), | |
501 | TYPE_TEMPLATE_ARGUMENTS (context)); | |
34eaf542 | 502 | if (result != NULL) |
c27e16e3 TT |
503 | { |
504 | do_cleanups (cleanups); | |
505 | return result; | |
506 | } | |
34eaf542 TT |
507 | } |
508 | ||
509 | do_cleanups (cleanups); | |
510 | } | |
511 | } | |
512 | ||
513 | return cp_lookup_symbol_imports (scope, name, block, domain, 1, 1); | |
514 | } | |
515 | ||
aff410f1 MS |
516 | /* Searches for NAME in the current namespace, and by applying |
517 | relevant import statements belonging to BLOCK and its parents. | |
518 | SCOPE is the namespace scope of the context in which the search is | |
519 | being evaluated. */ | |
8540c487 SW |
520 | |
521 | struct symbol* | |
522 | cp_lookup_symbol_namespace (const char *scope, | |
523 | const char *name, | |
8540c487 | 524 | const struct block *block, |
13387711 | 525 | const domain_enum domain) |
8540c487 SW |
526 | { |
527 | struct symbol *sym; | |
13387711 SW |
528 | |
529 | /* First, try to find the symbol in the given namespace. */ | |
aff410f1 | 530 | sym = cp_lookup_symbol_in_namespace (scope, name, |
8dea366b | 531 | block, domain, 1); |
13387711 SW |
532 | if (sym != NULL) |
533 | return sym; | |
8540c487 | 534 | |
aff410f1 MS |
535 | /* Search for name in namespaces imported to this and parent |
536 | blocks. */ | |
8540c487 SW |
537 | while (block != NULL) |
538 | { | |
aff410f1 MS |
539 | sym = cp_lookup_symbol_imports (scope, name, block, |
540 | domain, 0, 1); | |
8540c487 SW |
541 | |
542 | if (sym) | |
543 | return sym; | |
544 | ||
545 | block = BLOCK_SUPERBLOCK (block); | |
546 | } | |
547 | ||
548 | return NULL; | |
1fcb5155 DC |
549 | } |
550 | ||
551 | /* Lookup NAME at namespace scope (or, in C terms, in static and | |
552 | global variables). SCOPE is the namespace that the current | |
553 | function is defined within; only consider namespaces whose length | |
554 | is at least SCOPE_LEN. Other arguments are as in | |
555 | cp_lookup_symbol_nonlocal. | |
556 | ||
557 | For example, if we're within a function A::B::f and looking for a | |
3882f37a | 558 | symbol x, this will get called with NAME = "x", SCOPE = "A::B", and |
1fcb5155 DC |
559 | SCOPE_LEN = 0. It then calls itself with NAME and SCOPE the same, |
560 | but with SCOPE_LEN = 1. And then it calls itself with NAME and | |
561 | SCOPE the same, but with SCOPE_LEN = 4. This third call looks for | |
562 | "A::B::x"; if it doesn't find it, then the second call looks for | |
563 | "A::x", and if that call fails, then the first call looks for | |
564 | "x". */ | |
565 | ||
566 | static struct symbol * | |
567 | lookup_namespace_scope (const char *name, | |
1fcb5155 DC |
568 | const struct block *block, |
569 | const domain_enum domain, | |
1fcb5155 DC |
570 | const char *scope, |
571 | int scope_len) | |
572 | { | |
573 | char *namespace; | |
574 | ||
575 | if (scope[scope_len] != '\0') | |
576 | { | |
577 | /* Recursively search for names in child namespaces first. */ | |
578 | ||
579 | struct symbol *sym; | |
580 | int new_scope_len = scope_len; | |
581 | ||
582 | /* If the current scope is followed by "::", skip past that. */ | |
583 | if (new_scope_len != 0) | |
584 | { | |
585 | gdb_assert (scope[new_scope_len] == ':'); | |
586 | new_scope_len += 2; | |
587 | } | |
588 | new_scope_len += cp_find_first_component (scope + new_scope_len); | |
aff410f1 MS |
589 | sym = lookup_namespace_scope (name, block, domain, |
590 | scope, new_scope_len); | |
1fcb5155 DC |
591 | if (sym != NULL) |
592 | return sym; | |
593 | } | |
594 | ||
595 | /* Okay, we didn't find a match in our children, so look for the | |
596 | name in the current namespace. */ | |
597 | ||
598 | namespace = alloca (scope_len + 1); | |
599 | strncpy (namespace, scope, scope_len); | |
600 | namespace[scope_len] = '\0'; | |
aff410f1 | 601 | return cp_lookup_symbol_in_namespace (namespace, name, |
8dea366b | 602 | block, domain, 1); |
1fcb5155 DC |
603 | } |
604 | ||
605 | /* Look up NAME in BLOCK's static block and in global blocks. If | |
606 | ANONYMOUS_NAMESPACE is nonzero, the symbol in question is located | |
8dea366b KS |
607 | within an anonymous namespace. If SEARCH is non-zero, search through |
608 | base classes for a matching symbol. Other arguments are as in | |
1fcb5155 DC |
609 | cp_lookup_symbol_nonlocal. */ |
610 | ||
611 | static struct symbol * | |
612 | lookup_symbol_file (const char *name, | |
1fcb5155 DC |
613 | const struct block *block, |
614 | const domain_enum domain, | |
8dea366b | 615 | int anonymous_namespace, int search) |
1fcb5155 DC |
616 | { |
617 | struct symbol *sym = NULL; | |
618 | ||
94af9270 | 619 | sym = lookup_symbol_static (name, block, domain); |
1fcb5155 DC |
620 | if (sym != NULL) |
621 | return sym; | |
622 | ||
623 | if (anonymous_namespace) | |
624 | { | |
625 | /* Symbols defined in anonymous namespaces have external linkage | |
626 | but should be treated as local to a single file nonetheless. | |
627 | So we only search the current file's global block. */ | |
628 | ||
629 | const struct block *global_block = block_global_block (block); | |
630 | ||
631 | if (global_block != NULL) | |
94af9270 | 632 | sym = lookup_symbol_aux_block (name, global_block, domain); |
1fcb5155 DC |
633 | } |
634 | else | |
635 | { | |
94af9270 | 636 | sym = lookup_symbol_global (name, block, domain); |
5c4e30ca DC |
637 | } |
638 | ||
8dea366b KS |
639 | if (sym != NULL) |
640 | return sym; | |
641 | ||
642 | if (search) | |
643 | { | |
644 | char *klass, *nested; | |
645 | unsigned int prefix_len; | |
646 | struct cleanup *cleanup; | |
647 | struct symbol *klass_sym; | |
648 | ||
649 | /* A simple lookup failed. Check if the symbol was defined in | |
650 | a base class. */ | |
651 | ||
652 | cleanup = make_cleanup (null_cleanup, NULL); | |
653 | ||
654 | /* Find the name of the class and the name of the method, | |
655 | variable, etc. */ | |
656 | prefix_len = cp_entire_prefix_len (name); | |
657 | ||
658 | /* If no prefix was found, search "this". */ | |
659 | if (prefix_len == 0) | |
660 | { | |
661 | struct type *type; | |
662 | struct symbol *this; | |
663 | ||
664 | this = lookup_language_this (language_def (language_cplus), block); | |
665 | if (this == NULL) | |
666 | { | |
667 | do_cleanups (cleanup); | |
668 | return NULL; | |
669 | } | |
670 | ||
671 | type = check_typedef (TYPE_TARGET_TYPE (SYMBOL_TYPE (this))); | |
672 | klass = xstrdup (TYPE_NAME (type)); | |
673 | nested = xstrdup (name); | |
674 | } | |
675 | else | |
676 | { | |
677 | /* The class name is everything up to and including PREFIX_LEN. */ | |
678 | klass = savestring (name, prefix_len); | |
679 | ||
680 | /* The rest of the name is everything else past the initial scope | |
681 | operator. */ | |
682 | nested = xstrdup (name + prefix_len + 2); | |
683 | } | |
684 | ||
685 | /* Add cleanups to free memory for these strings. */ | |
686 | make_cleanup (xfree, klass); | |
687 | make_cleanup (xfree, nested); | |
688 | ||
689 | /* Lookup a class named KLASS. If none is found, there is nothing | |
690 | more that can be done. */ | |
691 | klass_sym = lookup_symbol_global (klass, block, domain); | |
692 | if (klass_sym == NULL) | |
693 | { | |
694 | do_cleanups (cleanup); | |
695 | return NULL; | |
696 | } | |
697 | ||
698 | /* Look for a symbol named NESTED in this class. */ | |
699 | sym = cp_lookup_nested_symbol (SYMBOL_TYPE (klass_sym), nested, block); | |
700 | do_cleanups (cleanup); | |
701 | } | |
702 | ||
703 | return sym; | |
704 | } | |
705 | ||
f7e3ecae KS |
706 | /* Search through the base classes of PARENT_TYPE for a base class |
707 | named NAME and return its type. If not found, return NULL. */ | |
708 | ||
709 | struct type * | |
710 | find_type_baseclass_by_name (struct type *parent_type, const char *name) | |
711 | { | |
712 | int i; | |
713 | ||
714 | CHECK_TYPEDEF (parent_type); | |
715 | for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i) | |
716 | { | |
717 | struct type *type = check_typedef (TYPE_BASECLASS (parent_type, i)); | |
718 | const char *base_name = TYPE_BASECLASS_NAME (parent_type, i); | |
719 | ||
720 | if (base_name == NULL) | |
721 | continue; | |
722 | ||
723 | if (streq (base_name, name)) | |
724 | return type; | |
725 | ||
726 | type = find_type_baseclass_by_name (type, name); | |
727 | if (type != NULL) | |
728 | return type; | |
729 | } | |
730 | ||
731 | return NULL; | |
732 | } | |
733 | ||
8dea366b KS |
734 | /* Search through the base classes of PARENT_TYPE for a symbol named |
735 | NAME in block BLOCK. */ | |
736 | ||
737 | static struct symbol * | |
738 | find_symbol_in_baseclass (struct type *parent_type, const char *name, | |
739 | const struct block *block) | |
740 | { | |
741 | int i; | |
742 | struct symbol *sym; | |
743 | struct cleanup *cleanup; | |
744 | char *concatenated_name; | |
745 | ||
746 | sym = NULL; | |
747 | concatenated_name = NULL; | |
748 | cleanup = make_cleanup (free_current_contents, &concatenated_name); | |
749 | for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i) | |
750 | { | |
751 | size_t len; | |
69fc87c2 | 752 | struct type *base_type = TYPE_BASECLASS (parent_type, i); |
8dea366b KS |
753 | const char *base_name = TYPE_BASECLASS_NAME (parent_type, i); |
754 | ||
755 | if (base_name == NULL) | |
756 | continue; | |
757 | ||
758 | /* Search this particular base class. */ | |
69fc87c2 DE |
759 | sym = cp_lookup_symbol_in_namespace (base_name, name, block, |
760 | VAR_DOMAIN, 0); | |
8dea366b KS |
761 | if (sym != NULL) |
762 | break; | |
763 | ||
69fc87c2 DE |
764 | /* Now search all static file-level symbols. We have to do this for |
765 | things like typedefs in the class. First search in this symtab, | |
766 | what we want is possibly there. */ | |
8dea366b KS |
767 | len = strlen (base_name) + 2 + strlen (name) + 1; |
768 | concatenated_name = xrealloc (concatenated_name, len); | |
769 | xsnprintf (concatenated_name, len, "%s::%s", base_name, name); | |
770 | sym = lookup_symbol_static (concatenated_name, block, VAR_DOMAIN); | |
69fc87c2 DE |
771 | if (sym != NULL) |
772 | break; | |
8dea366b | 773 | |
69fc87c2 DE |
774 | /* Nope. We now have to search all static blocks in all objfiles, |
775 | even if block != NULL, because there's no guarantees as to which | |
776 | symtab the symbol we want is in. */ | |
777 | sym = lookup_static_symbol_aux (concatenated_name, VAR_DOMAIN); | |
778 | if (sym != NULL) | |
779 | break; | |
8dea366b KS |
780 | |
781 | /* If this class has base classes, search them next. */ | |
69fc87c2 DE |
782 | CHECK_TYPEDEF (base_type); |
783 | if (TYPE_N_BASECLASSES (base_type) > 0) | |
8dea366b | 784 | { |
69fc87c2 | 785 | sym = find_symbol_in_baseclass (base_type, name, block); |
8dea366b KS |
786 | if (sym != NULL) |
787 | break; | |
788 | } | |
789 | } | |
790 | ||
791 | do_cleanups (cleanup); | |
0c2e6019 | 792 | return sym; |
5c4e30ca DC |
793 | } |
794 | ||
50af5481 | 795 | /* Look up a symbol named NESTED_NAME that is nested inside the C++ |
79c2c32d DC |
796 | class or namespace given by PARENT_TYPE, from within the context |
797 | given by BLOCK. Return NULL if there is no such nested type. */ | |
798 | ||
50af5481 JK |
799 | struct symbol * |
800 | cp_lookup_nested_symbol (struct type *parent_type, | |
801 | const char *nested_name, | |
802 | const struct block *block) | |
79c2c32d | 803 | { |
d8228535 JK |
804 | /* type_name_no_tag_required provides better error reporting using the |
805 | original type. */ | |
806 | struct type *saved_parent_type = parent_type; | |
807 | ||
808 | CHECK_TYPEDEF (parent_type); | |
809 | ||
79c2c32d DC |
810 | switch (TYPE_CODE (parent_type)) |
811 | { | |
63d06c5c | 812 | case TYPE_CODE_STRUCT: |
79c2c32d | 813 | case TYPE_CODE_NAMESPACE: |
48e32051 | 814 | case TYPE_CODE_UNION: |
530e8392 KB |
815 | /* NOTE: Handle modules here as well, because Fortran is re-using the C++ |
816 | specific code to lookup nested symbols in modules, by calling the | |
817 | function pointer la_lookup_symbol_nonlocal, which ends up here. */ | |
818 | case TYPE_CODE_MODULE: | |
79c2c32d | 819 | { |
63d06c5c DC |
820 | /* NOTE: carlton/2003-11-10: We don't treat C++ class members |
821 | of classes like, say, data or function members. Instead, | |
822 | they're just represented by symbols whose names are | |
823 | qualified by the name of the surrounding class. This is | |
824 | just like members of namespaces; in particular, | |
825 | lookup_symbol_namespace works when looking them up. */ | |
826 | ||
08850b56 | 827 | int size; |
d8228535 | 828 | const char *parent_name = type_name_no_tag_or_error (saved_parent_type); |
aff410f1 MS |
829 | struct symbol *sym |
830 | = cp_lookup_symbol_in_namespace (parent_name, nested_name, | |
8dea366b | 831 | block, VAR_DOMAIN, 0); |
41f62f39 | 832 | char *concatenated_name; |
c5504eaf | 833 | |
50af5481 JK |
834 | if (sym != NULL) |
835 | return sym; | |
41f62f39 | 836 | |
69fc87c2 DE |
837 | /* Now search all static file-level symbols. We have to do this |
838 | for things like typedefs in the class. We do not try to | |
aff410f1 | 839 | guess any imported namespace as even the fully specified |
8dea366b | 840 | namespace search is already not C++ compliant and more |
aff410f1 | 841 | assumptions could make it too magic. */ |
41f62f39 | 842 | |
08850b56 PM |
843 | size = strlen (parent_name) + 2 + strlen (nested_name) + 1; |
844 | concatenated_name = alloca (size); | |
845 | xsnprintf (concatenated_name, size, "%s::%s", | |
aff410f1 | 846 | parent_name, nested_name); |
50af5481 JK |
847 | sym = lookup_static_symbol_aux (concatenated_name, VAR_DOMAIN); |
848 | if (sym != NULL) | |
849 | return sym; | |
41f62f39 | 850 | |
8dea366b KS |
851 | /* If no matching symbols were found, try searching any |
852 | base classes. */ | |
853 | return find_symbol_in_baseclass (parent_type, nested_name, block); | |
79c2c32d | 854 | } |
bb869963 SDJ |
855 | |
856 | case TYPE_CODE_FUNC: | |
857 | case TYPE_CODE_METHOD: | |
858 | return NULL; | |
859 | ||
79c2c32d DC |
860 | default: |
861 | internal_error (__FILE__, __LINE__, | |
50af5481 | 862 | _("cp_lookup_nested_symbol called " |
3e43a32a | 863 | "on a non-aggregate type.")); |
79c2c32d DC |
864 | } |
865 | } | |
866 | ||
b368761e DC |
867 | /* The C++-version of lookup_transparent_type. */ |
868 | ||
869 | /* FIXME: carlton/2004-01-16: The problem that this is trying to | |
870 | address is that, unfortunately, sometimes NAME is wrong: it may not | |
871 | include the name of namespaces enclosing the type in question. | |
b021a221 | 872 | lookup_transparent_type gets called when the type in question |
b368761e DC |
873 | is a declaration, and we're trying to find its definition; but, for |
874 | declarations, our type name deduction mechanism doesn't work. | |
875 | There's nothing we can do to fix this in general, I think, in the | |
876 | absence of debug information about namespaces (I've filed PR | |
877 | gdb/1511 about this); until such debug information becomes more | |
878 | prevalent, one heuristic which sometimes looks is to search for the | |
879 | definition in namespaces containing the current namespace. | |
880 | ||
881 | We should delete this functions once the appropriate debug | |
882 | information becomes more widespread. (GCC 3.4 will be the first | |
883 | released version of GCC with such information.) */ | |
884 | ||
885 | struct type * | |
886 | cp_lookup_transparent_type (const char *name) | |
887 | { | |
888 | /* First, try the honest way of looking up the definition. */ | |
889 | struct type *t = basic_lookup_transparent_type (name); | |
890 | const char *scope; | |
891 | ||
892 | if (t != NULL) | |
893 | return t; | |
894 | ||
895 | /* If that doesn't work and we're within a namespace, look there | |
896 | instead. */ | |
897 | scope = block_scope (get_selected_block (0)); | |
898 | ||
899 | if (scope[0] == '\0') | |
900 | return NULL; | |
901 | ||
902 | return cp_lookup_transparent_type_loop (name, scope, 0); | |
903 | } | |
904 | ||
b021a221 MS |
905 | /* Lookup the type definition associated to NAME in namespaces/classes |
906 | containing SCOPE whose name is strictly longer than LENGTH. LENGTH | |
907 | must be the index of the start of a component of SCOPE. */ | |
b368761e DC |
908 | |
909 | static struct type * | |
aff410f1 MS |
910 | cp_lookup_transparent_type_loop (const char *name, |
911 | const char *scope, | |
b368761e DC |
912 | int length) |
913 | { | |
1198ecbe | 914 | int scope_length = length + cp_find_first_component (scope + length); |
b368761e DC |
915 | char *full_name; |
916 | ||
917 | /* If the current scope is followed by "::", look in the next | |
918 | component. */ | |
919 | if (scope[scope_length] == ':') | |
920 | { | |
921 | struct type *retval | |
aff410f1 MS |
922 | = cp_lookup_transparent_type_loop (name, scope, |
923 | scope_length + 2); | |
c5504eaf | 924 | |
b368761e DC |
925 | if (retval != NULL) |
926 | return retval; | |
927 | } | |
928 | ||
929 | full_name = alloca (scope_length + 2 + strlen (name) + 1); | |
930 | strncpy (full_name, scope, scope_length); | |
931 | strncpy (full_name + scope_length, "::", 2); | |
932 | strcpy (full_name + scope_length + 2, name); | |
933 | ||
934 | return basic_lookup_transparent_type (full_name); | |
935 | } | |
936 | ||
0c2e6019 TT |
937 | /* This used to do something but was removed when it became |
938 | obsolete. */ | |
5c4e30ca DC |
939 | |
940 | static void | |
941 | maintenance_cplus_namespace (char *args, int from_tty) | |
942 | { | |
0c2e6019 | 943 | printf_unfiltered (_("The `maint namespace' command was removed.\n")); |
5c4e30ca DC |
944 | } |
945 | ||
2c0b251b PA |
946 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
947 | extern initialize_file_ftype _initialize_cp_namespace; | |
948 | ||
5c4e30ca DC |
949 | void |
950 | _initialize_cp_namespace (void) | |
951 | { | |
0c2e6019 TT |
952 | struct cmd_list_element *cmd; |
953 | ||
954 | cmd = add_cmd ("namespace", class_maintenance, | |
955 | maintenance_cplus_namespace, | |
956 | _("Deprecated placeholder for removed functionality."), | |
957 | &maint_cplus_cmd_list); | |
958 | deprecate_cmd (cmd, NULL); | |
1fcb5155 | 959 | } |