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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 | |
b50c8614 KS |
224 | in it. |
225 | ||
226 | Class, union, and enum tag names may be used in C++ without specifying | |
227 | class-key or enum. If searching for a VAR_DOMAIN symbol fails, | |
228 | this function will search STRUCT_DOMAIN. [This is actually done in | |
229 | cp_lookup_symbol_in_namespace.] */ | |
1fcb5155 DC |
230 | |
231 | struct symbol * | |
232 | cp_lookup_symbol_nonlocal (const char *name, | |
1fcb5155 | 233 | const struct block *block, |
21b556f4 | 234 | const domain_enum domain) |
1fcb5155 | 235 | { |
8540c487 SW |
236 | struct symbol *sym; |
237 | const char *scope = block_scope (block); | |
238 | ||
aff410f1 MS |
239 | sym = lookup_namespace_scope (name, block, |
240 | domain, scope, 0); | |
8540c487 SW |
241 | if (sym != NULL) |
242 | return sym; | |
243 | ||
aff410f1 MS |
244 | return cp_lookup_symbol_namespace (scope, name, |
245 | block, domain); | |
8540c487 SW |
246 | } |
247 | ||
aff410f1 | 248 | /* Look up NAME in the C++ namespace NAMESPACE. Other arguments are |
8dea366b | 249 | as in cp_lookup_symbol_nonlocal. If SEARCH is non-zero, search |
b50c8614 KS |
250 | through base classes for a matching symbol. |
251 | ||
252 | If DOMAIN is VAR_DOMAIN and no matching symbol exists in that domain, | |
253 | this function will search STRUCT_DOMAIN for a match. */ | |
8540c487 SW |
254 | |
255 | static struct symbol * | |
256 | cp_lookup_symbol_in_namespace (const char *namespace, | |
257 | const char *name, | |
8540c487 | 258 | const struct block *block, |
8dea366b | 259 | const domain_enum domain, int search) |
8540c487 SW |
260 | { |
261 | if (namespace[0] == '\0') | |
262 | { | |
b50c8614 KS |
263 | struct symbol *sym = lookup_symbol_file (name, block, domain, 0, search); |
264 | ||
265 | if (sym == NULL && domain == VAR_DOMAIN) | |
266 | sym = lookup_symbol_file (name, block, STRUCT_DOMAIN, 0, search); | |
267 | ||
268 | return sym; | |
8540c487 SW |
269 | } |
270 | else | |
271 | { | |
b50c8614 | 272 | struct symbol *sym; |
aff410f1 MS |
273 | char *concatenated_name = alloca (strlen (namespace) + 2 |
274 | + strlen (name) + 1); | |
c5504eaf | 275 | |
8540c487 SW |
276 | strcpy (concatenated_name, namespace); |
277 | strcat (concatenated_name, "::"); | |
278 | strcat (concatenated_name, name); | |
b50c8614 KS |
279 | sym = lookup_symbol_file (concatenated_name, block, domain, |
280 | cp_is_anonymous (namespace), search); | |
281 | ||
282 | if (sym == NULL && domain == VAR_DOMAIN) | |
283 | sym = lookup_symbol_file (concatenated_name, block, STRUCT_DOMAIN, | |
284 | cp_is_anonymous (namespace), search); | |
285 | ||
286 | return sym; | |
8540c487 SW |
287 | } |
288 | } | |
289 | ||
b14e635e SW |
290 | /* Used for cleanups to reset the "searched" flag incase |
291 | of an error. */ | |
292 | ||
293 | static void | |
294 | reset_directive_searched (void *data) | |
295 | { | |
296 | struct using_direct *direct = data; | |
297 | direct->searched = 0; | |
298 | } | |
299 | ||
aff410f1 MS |
300 | /* Search for NAME by applying all import statements belonging to |
301 | BLOCK which are applicable in SCOPE. If DECLARATION_ONLY the | |
302 | search is restricted to using declarations. | |
13387711 SW |
303 | Example: |
304 | ||
aff410f1 | 305 | namespace A { |
13387711 SW |
306 | int x; |
307 | } | |
308 | using A::x; | |
309 | ||
aff410f1 MS |
310 | If SEARCH_PARENTS the search will include imports which are |
311 | applicable in parents of SCOPE. | |
b14e635e SW |
312 | Example: |
313 | ||
aff410f1 | 314 | namespace A { |
b14e635e | 315 | using namespace X; |
aff410f1 | 316 | namespace B { |
b14e635e SW |
317 | using namespace Y; |
318 | } | |
319 | } | |
320 | ||
aff410f1 MS |
321 | If SCOPE is "A::B" and SEARCH_PARENTS is true the imports of |
322 | namespaces X and Y will be considered. If SEARCH_PARENTS is false | |
323 | only the import of Y is considered. */ | |
8540c487 | 324 | |
13387711 | 325 | struct symbol * |
8540c487 SW |
326 | cp_lookup_symbol_imports (const char *scope, |
327 | const char *name, | |
8540c487 | 328 | const struct block *block, |
b14e635e | 329 | const domain_enum domain, |
13387711 | 330 | const int declaration_only, |
b14e635e | 331 | const int search_parents) |
8540c487 | 332 | { |
b14e635e | 333 | struct using_direct *current; |
13387711 | 334 | struct symbol *sym = NULL; |
8540c487 | 335 | int len; |
b14e635e SW |
336 | int directive_match; |
337 | struct cleanup *searched_cleanup; | |
8540c487 SW |
338 | |
339 | /* First, try to find the symbol in the given namespace. */ | |
13387711 | 340 | if (!declaration_only) |
aff410f1 | 341 | sym = cp_lookup_symbol_in_namespace (scope, name, |
8dea366b | 342 | block, domain, 1); |
13387711 | 343 | |
8540c487 SW |
344 | if (sym != NULL) |
345 | return sym; | |
346 | ||
aff410f1 MS |
347 | /* Go through the using directives. If any of them add new names to |
348 | the namespace we're searching in, see if we can find a match by | |
349 | applying them. */ | |
8540c487 SW |
350 | |
351 | for (current = block_using (block); | |
352 | current != NULL; | |
353 | current = current->next) | |
354 | { | |
32019081 JK |
355 | const char **excludep; |
356 | ||
b14e635e SW |
357 | len = strlen (current->import_dest); |
358 | directive_match = (search_parents | |
359 | ? (strncmp (scope, current->import_dest, | |
360 | strlen (current->import_dest)) == 0 | |
361 | && (len == 0 | |
aff410f1 MS |
362 | || scope[len] == ':' |
363 | || scope[len] == '\0')) | |
b14e635e | 364 | : strcmp (scope, current->import_dest) == 0); |
8540c487 | 365 | |
aff410f1 MS |
366 | /* If the import destination is the current scope or one of its |
367 | ancestors then it is applicable. */ | |
b14e635e | 368 | if (directive_match && !current->searched) |
8540c487 | 369 | { |
a1d705ee TT |
370 | /* Mark this import as searched so that the recursive call |
371 | does not search it again. */ | |
372 | current->searched = 1; | |
373 | searched_cleanup = make_cleanup (reset_directive_searched, | |
374 | current); | |
375 | ||
376 | /* If there is an import of a single declaration, compare the | |
377 | imported declaration (after optional renaming by its alias) | |
378 | with the sought out name. If there is a match pass | |
379 | current->import_src as NAMESPACE to direct the search | |
380 | towards the imported namespace. */ | |
381 | if (current->declaration | |
382 | && strcmp (name, current->alias | |
383 | ? current->alias : current->declaration) == 0) | |
384 | sym = cp_lookup_symbol_in_namespace (current->import_src, | |
385 | current->declaration, | |
8dea366b | 386 | block, domain, 1); |
a1d705ee TT |
387 | |
388 | /* If this is a DECLARATION_ONLY search or a symbol was found | |
389 | or this import statement was an import declaration, the | |
390 | search of this import is complete. */ | |
391 | if (declaration_only || sym != NULL || current->declaration) | |
392 | { | |
393 | current->searched = 0; | |
394 | discard_cleanups (searched_cleanup); | |
395 | ||
396 | if (sym != NULL) | |
397 | return sym; | |
398 | ||
399 | continue; | |
400 | } | |
401 | ||
402 | /* Do not follow CURRENT if NAME matches its EXCLUDES. */ | |
403 | for (excludep = current->excludes; *excludep; excludep++) | |
404 | if (strcmp (name, *excludep) == 0) | |
405 | break; | |
406 | if (*excludep) | |
407 | { | |
408 | discard_cleanups (searched_cleanup); | |
409 | continue; | |
410 | } | |
411 | ||
412 | if (current->alias != NULL | |
413 | && strcmp (name, current->alias) == 0) | |
414 | /* If the import is creating an alias and the alias matches | |
415 | the sought name. Pass current->import_src as the NAME to | |
416 | direct the search towards the aliased namespace. */ | |
417 | { | |
418 | sym = cp_lookup_symbol_in_namespace (scope, | |
419 | current->import_src, | |
8dea366b | 420 | block, domain, 1); |
a1d705ee TT |
421 | } |
422 | else if (current->alias == NULL) | |
423 | { | |
424 | /* If this import statement creates no alias, pass | |
425 | current->inner as NAMESPACE to direct the search | |
426 | towards the imported namespace. */ | |
427 | sym = cp_lookup_symbol_imports (current->import_src, | |
428 | name, block, | |
429 | domain, 0, 0); | |
430 | } | |
431 | current->searched = 0; | |
432 | discard_cleanups (searched_cleanup); | |
433 | ||
434 | if (sym != NULL) | |
435 | return sym; | |
8540c487 SW |
436 | } |
437 | } | |
438 | ||
439 | return NULL; | |
440 | } | |
441 | ||
34eaf542 TT |
442 | /* Helper function that searches an array of symbols for one named |
443 | NAME. */ | |
444 | ||
445 | static struct symbol * | |
aff410f1 MS |
446 | search_symbol_list (const char *name, int num, |
447 | struct symbol **syms) | |
34eaf542 TT |
448 | { |
449 | int i; | |
450 | ||
451 | /* Maybe we should store a dictionary in here instead. */ | |
452 | for (i = 0; i < num; ++i) | |
453 | { | |
454 | if (strcmp (name, SYMBOL_NATURAL_NAME (syms[i])) == 0) | |
455 | return syms[i]; | |
456 | } | |
457 | return NULL; | |
458 | } | |
459 | ||
460 | /* Like cp_lookup_symbol_imports, but if BLOCK is a function, it | |
461 | searches through the template parameters of the function and the | |
462 | function's type. */ | |
463 | ||
464 | struct symbol * | |
465 | cp_lookup_symbol_imports_or_template (const char *scope, | |
466 | const char *name, | |
467 | const struct block *block, | |
468 | const domain_enum domain) | |
469 | { | |
470 | struct symbol *function = BLOCK_FUNCTION (block); | |
471 | ||
472 | if (function != NULL && SYMBOL_LANGUAGE (function) == language_cplus) | |
473 | { | |
34eaf542 TT |
474 | /* Search the function's template parameters. */ |
475 | if (SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION (function)) | |
476 | { | |
aff410f1 MS |
477 | struct template_symbol *templ |
478 | = (struct template_symbol *) function; | |
34eaf542 TT |
479 | struct symbol *result; |
480 | ||
481 | result = search_symbol_list (name, | |
482 | templ->n_template_arguments, | |
483 | templ->template_arguments); | |
484 | if (result != NULL) | |
485 | return result; | |
486 | } | |
487 | ||
488 | /* Search the template parameters of the function's defining | |
489 | context. */ | |
490 | if (SYMBOL_NATURAL_NAME (function)) | |
491 | { | |
492 | struct type *context; | |
493 | char *name_copy = xstrdup (SYMBOL_NATURAL_NAME (function)); | |
494 | struct cleanup *cleanups = make_cleanup (xfree, name_copy); | |
495 | const struct language_defn *lang = language_def (language_cplus); | |
df6d5441 TT |
496 | struct gdbarch *arch |
497 | = get_objfile_arch (SYMBOL_SYMTAB (function)->objfile); | |
34eaf542 TT |
498 | const struct block *parent = BLOCK_SUPERBLOCK (block); |
499 | ||
500 | while (1) | |
501 | { | |
502 | struct symbol *result; | |
503 | unsigned int prefix_len = cp_entire_prefix_len (name_copy); | |
504 | ||
505 | if (prefix_len == 0) | |
506 | context = NULL; | |
507 | else | |
508 | { | |
509 | name_copy[prefix_len] = '\0'; | |
aff410f1 MS |
510 | context = lookup_typename (lang, arch, |
511 | name_copy, | |
512 | parent, 1); | |
34eaf542 TT |
513 | } |
514 | ||
515 | if (context == NULL) | |
516 | break; | |
517 | ||
aff410f1 MS |
518 | result |
519 | = search_symbol_list (name, | |
520 | TYPE_N_TEMPLATE_ARGUMENTS (context), | |
521 | TYPE_TEMPLATE_ARGUMENTS (context)); | |
34eaf542 | 522 | if (result != NULL) |
c27e16e3 TT |
523 | { |
524 | do_cleanups (cleanups); | |
525 | return result; | |
526 | } | |
34eaf542 TT |
527 | } |
528 | ||
529 | do_cleanups (cleanups); | |
530 | } | |
531 | } | |
532 | ||
533 | return cp_lookup_symbol_imports (scope, name, block, domain, 1, 1); | |
534 | } | |
535 | ||
aff410f1 MS |
536 | /* Searches for NAME in the current namespace, and by applying |
537 | relevant import statements belonging to BLOCK and its parents. | |
538 | SCOPE is the namespace scope of the context in which the search is | |
b50c8614 KS |
539 | being evaluated. |
540 | ||
541 | Class, union, and enum tag names may be used in C++ without specifying | |
542 | class-key or enum. If searching for a VAR_DOMAIN symbol fails, | |
543 | this function will search STRUCT_DOMAIN. [This is done in | |
544 | cp_lookup_symbol_in_namespace.] */ | |
8540c487 SW |
545 | |
546 | struct symbol* | |
547 | cp_lookup_symbol_namespace (const char *scope, | |
548 | const char *name, | |
8540c487 | 549 | const struct block *block, |
13387711 | 550 | const domain_enum domain) |
8540c487 SW |
551 | { |
552 | struct symbol *sym; | |
13387711 SW |
553 | |
554 | /* First, try to find the symbol in the given namespace. */ | |
aff410f1 | 555 | sym = cp_lookup_symbol_in_namespace (scope, name, |
8dea366b | 556 | block, domain, 1); |
13387711 SW |
557 | if (sym != NULL) |
558 | return sym; | |
8540c487 | 559 | |
aff410f1 MS |
560 | /* Search for name in namespaces imported to this and parent |
561 | blocks. */ | |
8540c487 SW |
562 | while (block != NULL) |
563 | { | |
aff410f1 MS |
564 | sym = cp_lookup_symbol_imports (scope, name, block, |
565 | domain, 0, 1); | |
8540c487 SW |
566 | |
567 | if (sym) | |
568 | return sym; | |
569 | ||
570 | block = BLOCK_SUPERBLOCK (block); | |
571 | } | |
572 | ||
573 | return NULL; | |
1fcb5155 DC |
574 | } |
575 | ||
576 | /* Lookup NAME at namespace scope (or, in C terms, in static and | |
577 | global variables). SCOPE is the namespace that the current | |
578 | function is defined within; only consider namespaces whose length | |
579 | is at least SCOPE_LEN. Other arguments are as in | |
580 | cp_lookup_symbol_nonlocal. | |
581 | ||
582 | For example, if we're within a function A::B::f and looking for a | |
3882f37a | 583 | symbol x, this will get called with NAME = "x", SCOPE = "A::B", and |
1fcb5155 DC |
584 | SCOPE_LEN = 0. It then calls itself with NAME and SCOPE the same, |
585 | but with SCOPE_LEN = 1. And then it calls itself with NAME and | |
586 | SCOPE the same, but with SCOPE_LEN = 4. This third call looks for | |
587 | "A::B::x"; if it doesn't find it, then the second call looks for | |
588 | "A::x", and if that call fails, then the first call looks for | |
589 | "x". */ | |
590 | ||
591 | static struct symbol * | |
592 | lookup_namespace_scope (const char *name, | |
1fcb5155 DC |
593 | const struct block *block, |
594 | const domain_enum domain, | |
1fcb5155 DC |
595 | const char *scope, |
596 | int scope_len) | |
597 | { | |
598 | char *namespace; | |
599 | ||
600 | if (scope[scope_len] != '\0') | |
601 | { | |
602 | /* Recursively search for names in child namespaces first. */ | |
603 | ||
604 | struct symbol *sym; | |
605 | int new_scope_len = scope_len; | |
606 | ||
607 | /* If the current scope is followed by "::", skip past that. */ | |
608 | if (new_scope_len != 0) | |
609 | { | |
610 | gdb_assert (scope[new_scope_len] == ':'); | |
611 | new_scope_len += 2; | |
612 | } | |
613 | new_scope_len += cp_find_first_component (scope + new_scope_len); | |
aff410f1 MS |
614 | sym = lookup_namespace_scope (name, block, domain, |
615 | scope, new_scope_len); | |
1fcb5155 DC |
616 | if (sym != NULL) |
617 | return sym; | |
618 | } | |
619 | ||
620 | /* Okay, we didn't find a match in our children, so look for the | |
621 | name in the current namespace. */ | |
622 | ||
623 | namespace = alloca (scope_len + 1); | |
624 | strncpy (namespace, scope, scope_len); | |
625 | namespace[scope_len] = '\0'; | |
aff410f1 | 626 | return cp_lookup_symbol_in_namespace (namespace, name, |
8dea366b | 627 | block, domain, 1); |
1fcb5155 DC |
628 | } |
629 | ||
630 | /* Look up NAME in BLOCK's static block and in global blocks. If | |
631 | ANONYMOUS_NAMESPACE is nonzero, the symbol in question is located | |
8dea366b KS |
632 | within an anonymous namespace. If SEARCH is non-zero, search through |
633 | base classes for a matching symbol. Other arguments are as in | |
1fcb5155 DC |
634 | cp_lookup_symbol_nonlocal. */ |
635 | ||
636 | static struct symbol * | |
637 | lookup_symbol_file (const char *name, | |
1fcb5155 DC |
638 | const struct block *block, |
639 | const domain_enum domain, | |
8dea366b | 640 | int anonymous_namespace, int search) |
1fcb5155 DC |
641 | { |
642 | struct symbol *sym = NULL; | |
643 | ||
94af9270 | 644 | sym = lookup_symbol_static (name, block, domain); |
1fcb5155 DC |
645 | if (sym != NULL) |
646 | return sym; | |
647 | ||
648 | if (anonymous_namespace) | |
649 | { | |
650 | /* Symbols defined in anonymous namespaces have external linkage | |
651 | but should be treated as local to a single file nonetheless. | |
652 | So we only search the current file's global block. */ | |
653 | ||
654 | const struct block *global_block = block_global_block (block); | |
655 | ||
656 | if (global_block != NULL) | |
94af9270 | 657 | sym = lookup_symbol_aux_block (name, global_block, domain); |
1fcb5155 DC |
658 | } |
659 | else | |
660 | { | |
94af9270 | 661 | sym = lookup_symbol_global (name, block, domain); |
5c4e30ca DC |
662 | } |
663 | ||
8dea366b KS |
664 | if (sym != NULL) |
665 | return sym; | |
666 | ||
667 | if (search) | |
668 | { | |
669 | char *klass, *nested; | |
670 | unsigned int prefix_len; | |
671 | struct cleanup *cleanup; | |
672 | struct symbol *klass_sym; | |
673 | ||
674 | /* A simple lookup failed. Check if the symbol was defined in | |
675 | a base class. */ | |
676 | ||
677 | cleanup = make_cleanup (null_cleanup, NULL); | |
678 | ||
679 | /* Find the name of the class and the name of the method, | |
680 | variable, etc. */ | |
681 | prefix_len = cp_entire_prefix_len (name); | |
682 | ||
683 | /* If no prefix was found, search "this". */ | |
684 | if (prefix_len == 0) | |
685 | { | |
686 | struct type *type; | |
687 | struct symbol *this; | |
688 | ||
689 | this = lookup_language_this (language_def (language_cplus), block); | |
690 | if (this == NULL) | |
691 | { | |
692 | do_cleanups (cleanup); | |
693 | return NULL; | |
694 | } | |
695 | ||
696 | type = check_typedef (TYPE_TARGET_TYPE (SYMBOL_TYPE (this))); | |
c4f87ca6 KS |
697 | /* If TYPE_NAME is NULL, abandon trying to find this symbol. |
698 | This can happen for lambda functions compiled with clang++, | |
699 | which outputs no name for the container class. */ | |
700 | if (TYPE_NAME (type) == NULL) | |
701 | return NULL; | |
8dea366b KS |
702 | klass = xstrdup (TYPE_NAME (type)); |
703 | nested = xstrdup (name); | |
704 | } | |
705 | else | |
706 | { | |
707 | /* The class name is everything up to and including PREFIX_LEN. */ | |
708 | klass = savestring (name, prefix_len); | |
709 | ||
710 | /* The rest of the name is everything else past the initial scope | |
711 | operator. */ | |
712 | nested = xstrdup (name + prefix_len + 2); | |
713 | } | |
714 | ||
715 | /* Add cleanups to free memory for these strings. */ | |
716 | make_cleanup (xfree, klass); | |
717 | make_cleanup (xfree, nested); | |
718 | ||
719 | /* Lookup a class named KLASS. If none is found, there is nothing | |
720 | more that can be done. */ | |
b50c8614 | 721 | klass_sym = lookup_symbol_global (klass, block, STRUCT_DOMAIN); |
8dea366b KS |
722 | if (klass_sym == NULL) |
723 | { | |
724 | do_cleanups (cleanup); | |
725 | return NULL; | |
726 | } | |
727 | ||
728 | /* Look for a symbol named NESTED in this class. */ | |
729 | sym = cp_lookup_nested_symbol (SYMBOL_TYPE (klass_sym), nested, block); | |
730 | do_cleanups (cleanup); | |
731 | } | |
732 | ||
733 | return sym; | |
734 | } | |
735 | ||
f7e3ecae KS |
736 | /* Search through the base classes of PARENT_TYPE for a base class |
737 | named NAME and return its type. If not found, return NULL. */ | |
738 | ||
739 | struct type * | |
740 | find_type_baseclass_by_name (struct type *parent_type, const char *name) | |
741 | { | |
742 | int i; | |
743 | ||
744 | CHECK_TYPEDEF (parent_type); | |
745 | for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i) | |
746 | { | |
747 | struct type *type = check_typedef (TYPE_BASECLASS (parent_type, i)); | |
748 | const char *base_name = TYPE_BASECLASS_NAME (parent_type, i); | |
749 | ||
750 | if (base_name == NULL) | |
751 | continue; | |
752 | ||
753 | if (streq (base_name, name)) | |
754 | return type; | |
755 | ||
756 | type = find_type_baseclass_by_name (type, name); | |
757 | if (type != NULL) | |
758 | return type; | |
759 | } | |
760 | ||
761 | return NULL; | |
762 | } | |
763 | ||
8dea366b KS |
764 | /* Search through the base classes of PARENT_TYPE for a symbol named |
765 | NAME in block BLOCK. */ | |
766 | ||
767 | static struct symbol * | |
768 | find_symbol_in_baseclass (struct type *parent_type, const char *name, | |
769 | const struct block *block) | |
770 | { | |
771 | int i; | |
772 | struct symbol *sym; | |
773 | struct cleanup *cleanup; | |
774 | char *concatenated_name; | |
775 | ||
776 | sym = NULL; | |
777 | concatenated_name = NULL; | |
778 | cleanup = make_cleanup (free_current_contents, &concatenated_name); | |
779 | for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i) | |
780 | { | |
781 | size_t len; | |
69fc87c2 | 782 | struct type *base_type = TYPE_BASECLASS (parent_type, i); |
8dea366b KS |
783 | const char *base_name = TYPE_BASECLASS_NAME (parent_type, i); |
784 | ||
785 | if (base_name == NULL) | |
786 | continue; | |
787 | ||
788 | /* Search this particular base class. */ | |
69fc87c2 DE |
789 | sym = cp_lookup_symbol_in_namespace (base_name, name, block, |
790 | VAR_DOMAIN, 0); | |
8dea366b KS |
791 | if (sym != NULL) |
792 | break; | |
793 | ||
69fc87c2 DE |
794 | /* Now search all static file-level symbols. We have to do this for |
795 | things like typedefs in the class. First search in this symtab, | |
796 | what we want is possibly there. */ | |
8dea366b KS |
797 | len = strlen (base_name) + 2 + strlen (name) + 1; |
798 | concatenated_name = xrealloc (concatenated_name, len); | |
799 | xsnprintf (concatenated_name, len, "%s::%s", base_name, name); | |
800 | sym = lookup_symbol_static (concatenated_name, block, VAR_DOMAIN); | |
69fc87c2 DE |
801 | if (sym != NULL) |
802 | break; | |
8dea366b | 803 | |
69fc87c2 DE |
804 | /* Nope. We now have to search all static blocks in all objfiles, |
805 | even if block != NULL, because there's no guarantees as to which | |
806 | symtab the symbol we want is in. */ | |
807 | sym = lookup_static_symbol_aux (concatenated_name, VAR_DOMAIN); | |
808 | if (sym != NULL) | |
809 | break; | |
8dea366b KS |
810 | |
811 | /* If this class has base classes, search them next. */ | |
69fc87c2 DE |
812 | CHECK_TYPEDEF (base_type); |
813 | if (TYPE_N_BASECLASSES (base_type) > 0) | |
8dea366b | 814 | { |
69fc87c2 | 815 | sym = find_symbol_in_baseclass (base_type, name, block); |
8dea366b KS |
816 | if (sym != NULL) |
817 | break; | |
818 | } | |
819 | } | |
820 | ||
821 | do_cleanups (cleanup); | |
0c2e6019 | 822 | return sym; |
5c4e30ca DC |
823 | } |
824 | ||
50af5481 | 825 | /* Look up a symbol named NESTED_NAME that is nested inside the C++ |
79c2c32d DC |
826 | class or namespace given by PARENT_TYPE, from within the context |
827 | given by BLOCK. Return NULL if there is no such nested type. */ | |
828 | ||
50af5481 JK |
829 | struct symbol * |
830 | cp_lookup_nested_symbol (struct type *parent_type, | |
831 | const char *nested_name, | |
832 | const struct block *block) | |
79c2c32d | 833 | { |
d8228535 JK |
834 | /* type_name_no_tag_required provides better error reporting using the |
835 | original type. */ | |
836 | struct type *saved_parent_type = parent_type; | |
837 | ||
838 | CHECK_TYPEDEF (parent_type); | |
839 | ||
79c2c32d DC |
840 | switch (TYPE_CODE (parent_type)) |
841 | { | |
63d06c5c | 842 | case TYPE_CODE_STRUCT: |
79c2c32d | 843 | case TYPE_CODE_NAMESPACE: |
48e32051 | 844 | case TYPE_CODE_UNION: |
3d567982 | 845 | case TYPE_CODE_ENUM: |
530e8392 KB |
846 | /* NOTE: Handle modules here as well, because Fortran is re-using the C++ |
847 | specific code to lookup nested symbols in modules, by calling the | |
848 | function pointer la_lookup_symbol_nonlocal, which ends up here. */ | |
849 | case TYPE_CODE_MODULE: | |
79c2c32d | 850 | { |
63d06c5c DC |
851 | /* NOTE: carlton/2003-11-10: We don't treat C++ class members |
852 | of classes like, say, data or function members. Instead, | |
853 | they're just represented by symbols whose names are | |
854 | qualified by the name of the surrounding class. This is | |
855 | just like members of namespaces; in particular, | |
856 | lookup_symbol_namespace works when looking them up. */ | |
857 | ||
08850b56 | 858 | int size; |
d8228535 | 859 | const char *parent_name = type_name_no_tag_or_error (saved_parent_type); |
aff410f1 MS |
860 | struct symbol *sym |
861 | = cp_lookup_symbol_in_namespace (parent_name, nested_name, | |
8dea366b | 862 | block, VAR_DOMAIN, 0); |
41f62f39 | 863 | char *concatenated_name; |
c5504eaf | 864 | |
50af5481 JK |
865 | if (sym != NULL) |
866 | return sym; | |
41f62f39 | 867 | |
69fc87c2 DE |
868 | /* Now search all static file-level symbols. We have to do this |
869 | for things like typedefs in the class. We do not try to | |
aff410f1 | 870 | guess any imported namespace as even the fully specified |
8dea366b | 871 | namespace search is already not C++ compliant and more |
aff410f1 | 872 | assumptions could make it too magic. */ |
41f62f39 | 873 | |
08850b56 PM |
874 | size = strlen (parent_name) + 2 + strlen (nested_name) + 1; |
875 | concatenated_name = alloca (size); | |
876 | xsnprintf (concatenated_name, size, "%s::%s", | |
aff410f1 | 877 | parent_name, nested_name); |
50af5481 JK |
878 | sym = lookup_static_symbol_aux (concatenated_name, VAR_DOMAIN); |
879 | if (sym != NULL) | |
880 | return sym; | |
41f62f39 | 881 | |
8dea366b KS |
882 | /* If no matching symbols were found, try searching any |
883 | base classes. */ | |
884 | return find_symbol_in_baseclass (parent_type, nested_name, block); | |
79c2c32d | 885 | } |
bb869963 SDJ |
886 | |
887 | case TYPE_CODE_FUNC: | |
888 | case TYPE_CODE_METHOD: | |
889 | return NULL; | |
890 | ||
79c2c32d DC |
891 | default: |
892 | internal_error (__FILE__, __LINE__, | |
50af5481 | 893 | _("cp_lookup_nested_symbol called " |
3e43a32a | 894 | "on a non-aggregate type.")); |
79c2c32d DC |
895 | } |
896 | } | |
897 | ||
b368761e DC |
898 | /* The C++-version of lookup_transparent_type. */ |
899 | ||
900 | /* FIXME: carlton/2004-01-16: The problem that this is trying to | |
901 | address is that, unfortunately, sometimes NAME is wrong: it may not | |
902 | include the name of namespaces enclosing the type in question. | |
b021a221 | 903 | lookup_transparent_type gets called when the type in question |
b368761e DC |
904 | is a declaration, and we're trying to find its definition; but, for |
905 | declarations, our type name deduction mechanism doesn't work. | |
906 | There's nothing we can do to fix this in general, I think, in the | |
907 | absence of debug information about namespaces (I've filed PR | |
908 | gdb/1511 about this); until such debug information becomes more | |
909 | prevalent, one heuristic which sometimes looks is to search for the | |
910 | definition in namespaces containing the current namespace. | |
911 | ||
912 | We should delete this functions once the appropriate debug | |
913 | information becomes more widespread. (GCC 3.4 will be the first | |
914 | released version of GCC with such information.) */ | |
915 | ||
916 | struct type * | |
917 | cp_lookup_transparent_type (const char *name) | |
918 | { | |
919 | /* First, try the honest way of looking up the definition. */ | |
920 | struct type *t = basic_lookup_transparent_type (name); | |
921 | const char *scope; | |
922 | ||
923 | if (t != NULL) | |
924 | return t; | |
925 | ||
926 | /* If that doesn't work and we're within a namespace, look there | |
927 | instead. */ | |
928 | scope = block_scope (get_selected_block (0)); | |
929 | ||
930 | if (scope[0] == '\0') | |
931 | return NULL; | |
932 | ||
933 | return cp_lookup_transparent_type_loop (name, scope, 0); | |
934 | } | |
935 | ||
b021a221 MS |
936 | /* Lookup the type definition associated to NAME in namespaces/classes |
937 | containing SCOPE whose name is strictly longer than LENGTH. LENGTH | |
938 | must be the index of the start of a component of SCOPE. */ | |
b368761e DC |
939 | |
940 | static struct type * | |
aff410f1 MS |
941 | cp_lookup_transparent_type_loop (const char *name, |
942 | const char *scope, | |
b368761e DC |
943 | int length) |
944 | { | |
1198ecbe | 945 | int scope_length = length + cp_find_first_component (scope + length); |
b368761e DC |
946 | char *full_name; |
947 | ||
948 | /* If the current scope is followed by "::", look in the next | |
949 | component. */ | |
950 | if (scope[scope_length] == ':') | |
951 | { | |
952 | struct type *retval | |
aff410f1 MS |
953 | = cp_lookup_transparent_type_loop (name, scope, |
954 | scope_length + 2); | |
c5504eaf | 955 | |
b368761e DC |
956 | if (retval != NULL) |
957 | return retval; | |
958 | } | |
959 | ||
960 | full_name = alloca (scope_length + 2 + strlen (name) + 1); | |
961 | strncpy (full_name, scope, scope_length); | |
962 | strncpy (full_name + scope_length, "::", 2); | |
963 | strcpy (full_name + scope_length + 2, name); | |
964 | ||
965 | return basic_lookup_transparent_type (full_name); | |
966 | } | |
967 | ||
0c2e6019 TT |
968 | /* This used to do something but was removed when it became |
969 | obsolete. */ | |
5c4e30ca DC |
970 | |
971 | static void | |
972 | maintenance_cplus_namespace (char *args, int from_tty) | |
973 | { | |
0c2e6019 | 974 | printf_unfiltered (_("The `maint namespace' command was removed.\n")); |
5c4e30ca DC |
975 | } |
976 | ||
2c0b251b PA |
977 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
978 | extern initialize_file_ftype _initialize_cp_namespace; | |
979 | ||
5c4e30ca DC |
980 | void |
981 | _initialize_cp_namespace (void) | |
982 | { | |
0c2e6019 TT |
983 | struct cmd_list_element *cmd; |
984 | ||
985 | cmd = add_cmd ("namespace", class_maintenance, | |
986 | maintenance_cplus_namespace, | |
987 | _("Deprecated placeholder for removed functionality."), | |
988 | &maint_cplus_cmd_list); | |
989 | deprecate_cmd (cmd, NULL); | |
1fcb5155 | 990 | } |