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9219021c | 1 | /* Helper routines for C++ support in GDB. |
28e7fd62 | 2 | Copyright (C) 2003-2013 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. */ | |
32019081 | 99 | cp_add_using_directive (dest, src, NULL, NULL, NULL, |
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 | |
32019081 JK |
120 | it is NULL. EXCLUDES is a list of names not to import from an imported |
121 | module or NULL. The arguments are copied into newly allocated memory so | |
122 | they can be temporaries. For EXCLUDES the VEC pointers are copied but the | |
123 | pointed to characters are not copied. */ | |
9219021c DC |
124 | |
125 | void | |
13387711 SW |
126 | cp_add_using_directive (const char *dest, |
127 | const char *src, | |
128 | const char *alias, | |
129 | const char *declaration, | |
32019081 | 130 | VEC (const_char_ptr) *excludes, |
c0cc3a76 | 131 | struct obstack *obstack) |
9219021c DC |
132 | { |
133 | struct using_direct *current; | |
134 | struct using_direct *new; | |
13387711 | 135 | |
9219021c DC |
136 | /* Has it already been added? */ |
137 | ||
27aa8d6a | 138 | for (current = using_directives; current != NULL; current = current->next) |
9219021c | 139 | { |
32019081 JK |
140 | int ix; |
141 | const char *param; | |
142 | ||
70c622a3 JK |
143 | if (strcmp (current->import_src, src) != 0) |
144 | continue; | |
145 | if (strcmp (current->import_dest, dest) != 0) | |
146 | continue; | |
147 | if ((alias == NULL && current->alias != NULL) | |
148 | || (alias != NULL && current->alias == NULL) | |
149 | || (alias != NULL && current->alias != NULL | |
150 | && strcmp (alias, current->alias) != 0)) | |
151 | continue; | |
152 | if ((declaration == NULL && current->declaration != NULL) | |
153 | || (declaration != NULL && current->declaration == NULL) | |
154 | || (declaration != NULL && current->declaration != NULL | |
155 | && strcmp (declaration, current->declaration) != 0)) | |
156 | continue; | |
157 | ||
32019081 JK |
158 | /* Compare the contents of EXCLUDES. */ |
159 | for (ix = 0; VEC_iterate (const_char_ptr, excludes, ix, param); ix++) | |
160 | if (current->excludes[ix] == NULL | |
161 | || strcmp (param, current->excludes[ix]) != 0) | |
162 | break; | |
163 | if (ix < VEC_length (const_char_ptr, excludes) | |
164 | || current->excludes[ix] != NULL) | |
165 | continue; | |
166 | ||
70c622a3 JK |
167 | /* Parameters exactly match CURRENT. */ |
168 | return; | |
9219021c DC |
169 | } |
170 | ||
32019081 JK |
171 | new = obstack_alloc (obstack, (sizeof (*new) |
172 | + (VEC_length (const_char_ptr, excludes) | |
173 | * sizeof (*new->excludes)))); | |
174 | memset (new, 0, sizeof (*new)); | |
c0cc3a76 | 175 | |
10f0c4bb TT |
176 | new->import_src = obstack_copy0 (obstack, src, strlen (src)); |
177 | new->import_dest = obstack_copy0 (obstack, dest, strlen (dest)); | |
794684b6 | 178 | |
c0cc3a76 | 179 | if (alias != NULL) |
10f0c4bb | 180 | new->alias = obstack_copy0 (obstack, alias, strlen (alias)); |
c0cc3a76 | 181 | |
13387711 | 182 | if (declaration != NULL) |
10f0c4bb TT |
183 | new->declaration = obstack_copy0 (obstack, |
184 | declaration, strlen (declaration)); | |
13387711 | 185 | |
32019081 JK |
186 | memcpy (new->excludes, VEC_address (const_char_ptr, excludes), |
187 | VEC_length (const_char_ptr, excludes) * sizeof (*new->excludes)); | |
188 | new->excludes[VEC_length (const_char_ptr, excludes)] = NULL; | |
189 | ||
c0cc3a76 SW |
190 | new->next = using_directives; |
191 | using_directives = new; | |
9219021c DC |
192 | } |
193 | ||
194 | /* Record the namespace that the function defined by SYMBOL was | |
195 | defined in, if necessary. BLOCK is the associated block; use | |
196 | OBSTACK for allocation. */ | |
197 | ||
198 | void | |
199 | cp_set_block_scope (const struct symbol *symbol, | |
200 | struct block *block, | |
df8a16a1 DJ |
201 | struct obstack *obstack, |
202 | const char *processing_current_prefix, | |
203 | int processing_has_namespace_info) | |
9219021c | 204 | { |
df8a16a1 | 205 | if (processing_has_namespace_info) |
9219021c | 206 | { |
df8a16a1 | 207 | block_set_scope |
10f0c4bb TT |
208 | (block, obstack_copy0 (obstack, processing_current_prefix, |
209 | strlen (processing_current_prefix)), | |
df8a16a1 DJ |
210 | obstack); |
211 | } | |
212 | else if (SYMBOL_DEMANGLED_NAME (symbol) != NULL) | |
213 | { | |
214 | /* Try to figure out the appropriate namespace from the | |
215 | demangled name. */ | |
9219021c | 216 | |
df8a16a1 DJ |
217 | /* FIXME: carlton/2003-04-15: If the function in question is |
218 | a method of a class, the name will actually include the | |
219 | name of the class as well. This should be harmless, but | |
220 | is a little unfortunate. */ | |
9219021c | 221 | |
df8a16a1 DJ |
222 | const char *name = SYMBOL_DEMANGLED_NAME (symbol); |
223 | unsigned int prefix_len = cp_entire_prefix_len (name); | |
9219021c | 224 | |
df8a16a1 | 225 | block_set_scope (block, |
10f0c4bb | 226 | obstack_copy0 (obstack, name, prefix_len), |
df8a16a1 | 227 | obstack); |
9219021c DC |
228 | } |
229 | } | |
230 | ||
231 | /* Test whether or not NAMESPACE looks like it mentions an anonymous | |
232 | namespace; return nonzero if so. */ | |
233 | ||
234 | int | |
235 | cp_is_anonymous (const char *namespace) | |
236 | { | |
2b1dbab0 | 237 | return (strstr (namespace, CP_ANONYMOUS_NAMESPACE_STR) |
9219021c DC |
238 | != NULL); |
239 | } | |
240 | ||
1fcb5155 DC |
241 | /* The C++-specific version of name lookup for static and global |
242 | names. This makes sure that names get looked for in all namespaces | |
243 | that are in scope. NAME is the natural name of the symbol that | |
94af9270 | 244 | we're looking for, BLOCK is the block that we're searching within, |
aff410f1 MS |
245 | DOMAIN says what kind of symbols we're looking for, and if SYMTAB |
246 | is non-NULL, we should store the symtab where we found the symbol | |
247 | in it. */ | |
1fcb5155 DC |
248 | |
249 | struct symbol * | |
250 | cp_lookup_symbol_nonlocal (const char *name, | |
1fcb5155 | 251 | const struct block *block, |
21b556f4 | 252 | const domain_enum domain) |
1fcb5155 | 253 | { |
8540c487 SW |
254 | struct symbol *sym; |
255 | const char *scope = block_scope (block); | |
256 | ||
aff410f1 MS |
257 | sym = lookup_namespace_scope (name, block, |
258 | domain, scope, 0); | |
8540c487 SW |
259 | if (sym != NULL) |
260 | return sym; | |
261 | ||
aff410f1 MS |
262 | return cp_lookup_symbol_namespace (scope, name, |
263 | block, domain); | |
8540c487 SW |
264 | } |
265 | ||
aff410f1 | 266 | /* Look up NAME in the C++ namespace NAMESPACE. Other arguments are |
8dea366b KS |
267 | as in cp_lookup_symbol_nonlocal. If SEARCH is non-zero, search |
268 | through base classes for a matching symbol. */ | |
8540c487 SW |
269 | |
270 | static struct symbol * | |
271 | cp_lookup_symbol_in_namespace (const char *namespace, | |
272 | const char *name, | |
8540c487 | 273 | const struct block *block, |
8dea366b | 274 | const domain_enum domain, int search) |
8540c487 SW |
275 | { |
276 | if (namespace[0] == '\0') | |
277 | { | |
8dea366b | 278 | return lookup_symbol_file (name, block, domain, 0, search); |
8540c487 SW |
279 | } |
280 | else | |
281 | { | |
aff410f1 MS |
282 | char *concatenated_name = alloca (strlen (namespace) + 2 |
283 | + strlen (name) + 1); | |
c5504eaf | 284 | |
8540c487 SW |
285 | strcpy (concatenated_name, namespace); |
286 | strcat (concatenated_name, "::"); | |
287 | strcat (concatenated_name, name); | |
aff410f1 | 288 | return lookup_symbol_file (concatenated_name, block, domain, |
8dea366b | 289 | cp_is_anonymous (namespace), search); |
8540c487 SW |
290 | } |
291 | } | |
292 | ||
b14e635e SW |
293 | /* Used for cleanups to reset the "searched" flag incase |
294 | of an error. */ | |
295 | ||
296 | static void | |
297 | reset_directive_searched (void *data) | |
298 | { | |
299 | struct using_direct *direct = data; | |
300 | direct->searched = 0; | |
301 | } | |
302 | ||
aff410f1 MS |
303 | /* Search for NAME by applying all import statements belonging to |
304 | BLOCK which are applicable in SCOPE. If DECLARATION_ONLY the | |
305 | search is restricted to using declarations. | |
13387711 SW |
306 | Example: |
307 | ||
aff410f1 | 308 | namespace A { |
13387711 SW |
309 | int x; |
310 | } | |
311 | using A::x; | |
312 | ||
aff410f1 MS |
313 | If SEARCH_PARENTS the search will include imports which are |
314 | applicable in parents of SCOPE. | |
b14e635e SW |
315 | Example: |
316 | ||
aff410f1 | 317 | namespace A { |
b14e635e | 318 | using namespace X; |
aff410f1 | 319 | namespace B { |
b14e635e SW |
320 | using namespace Y; |
321 | } | |
322 | } | |
323 | ||
aff410f1 MS |
324 | If SCOPE is "A::B" and SEARCH_PARENTS is true the imports of |
325 | namespaces X and Y will be considered. If SEARCH_PARENTS is false | |
326 | only the import of Y is considered. */ | |
8540c487 | 327 | |
13387711 | 328 | struct symbol * |
8540c487 SW |
329 | cp_lookup_symbol_imports (const char *scope, |
330 | const char *name, | |
8540c487 | 331 | const struct block *block, |
b14e635e | 332 | const domain_enum domain, |
13387711 | 333 | const int declaration_only, |
b14e635e | 334 | const int search_parents) |
8540c487 | 335 | { |
b14e635e | 336 | struct using_direct *current; |
13387711 | 337 | struct symbol *sym = NULL; |
8540c487 | 338 | int len; |
b14e635e SW |
339 | int directive_match; |
340 | struct cleanup *searched_cleanup; | |
8540c487 SW |
341 | |
342 | /* First, try to find the symbol in the given namespace. */ | |
13387711 | 343 | if (!declaration_only) |
aff410f1 | 344 | sym = cp_lookup_symbol_in_namespace (scope, name, |
8dea366b | 345 | block, domain, 1); |
13387711 | 346 | |
8540c487 SW |
347 | if (sym != NULL) |
348 | return sym; | |
349 | ||
aff410f1 MS |
350 | /* Go through the using directives. If any of them add new names to |
351 | the namespace we're searching in, see if we can find a match by | |
352 | applying them. */ | |
8540c487 SW |
353 | |
354 | for (current = block_using (block); | |
355 | current != NULL; | |
356 | current = current->next) | |
357 | { | |
32019081 JK |
358 | const char **excludep; |
359 | ||
b14e635e SW |
360 | len = strlen (current->import_dest); |
361 | directive_match = (search_parents | |
362 | ? (strncmp (scope, current->import_dest, | |
363 | strlen (current->import_dest)) == 0 | |
364 | && (len == 0 | |
aff410f1 MS |
365 | || scope[len] == ':' |
366 | || scope[len] == '\0')) | |
b14e635e | 367 | : strcmp (scope, current->import_dest) == 0); |
8540c487 | 368 | |
aff410f1 MS |
369 | /* If the import destination is the current scope or one of its |
370 | ancestors then it is applicable. */ | |
b14e635e | 371 | if (directive_match && !current->searched) |
8540c487 | 372 | { |
a1d705ee TT |
373 | /* Mark this import as searched so that the recursive call |
374 | does not search it again. */ | |
375 | current->searched = 1; | |
376 | searched_cleanup = make_cleanup (reset_directive_searched, | |
377 | current); | |
378 | ||
379 | /* If there is an import of a single declaration, compare the | |
380 | imported declaration (after optional renaming by its alias) | |
381 | with the sought out name. If there is a match pass | |
382 | current->import_src as NAMESPACE to direct the search | |
383 | towards the imported namespace. */ | |
384 | if (current->declaration | |
385 | && strcmp (name, current->alias | |
386 | ? current->alias : current->declaration) == 0) | |
387 | sym = cp_lookup_symbol_in_namespace (current->import_src, | |
388 | current->declaration, | |
8dea366b | 389 | block, domain, 1); |
a1d705ee TT |
390 | |
391 | /* If this is a DECLARATION_ONLY search or a symbol was found | |
392 | or this import statement was an import declaration, the | |
393 | search of this import is complete. */ | |
394 | if (declaration_only || sym != NULL || current->declaration) | |
395 | { | |
396 | current->searched = 0; | |
397 | discard_cleanups (searched_cleanup); | |
398 | ||
399 | if (sym != NULL) | |
400 | return sym; | |
401 | ||
402 | continue; | |
403 | } | |
404 | ||
405 | /* Do not follow CURRENT if NAME matches its EXCLUDES. */ | |
406 | for (excludep = current->excludes; *excludep; excludep++) | |
407 | if (strcmp (name, *excludep) == 0) | |
408 | break; | |
409 | if (*excludep) | |
410 | { | |
411 | discard_cleanups (searched_cleanup); | |
412 | continue; | |
413 | } | |
414 | ||
415 | if (current->alias != NULL | |
416 | && strcmp (name, current->alias) == 0) | |
417 | /* If the import is creating an alias and the alias matches | |
418 | the sought name. Pass current->import_src as the NAME to | |
419 | direct the search towards the aliased namespace. */ | |
420 | { | |
421 | sym = cp_lookup_symbol_in_namespace (scope, | |
422 | current->import_src, | |
8dea366b | 423 | block, domain, 1); |
a1d705ee TT |
424 | } |
425 | else if (current->alias == NULL) | |
426 | { | |
427 | /* If this import statement creates no alias, pass | |
428 | current->inner as NAMESPACE to direct the search | |
429 | towards the imported namespace. */ | |
430 | sym = cp_lookup_symbol_imports (current->import_src, | |
431 | name, block, | |
432 | domain, 0, 0); | |
433 | } | |
434 | current->searched = 0; | |
435 | discard_cleanups (searched_cleanup); | |
436 | ||
437 | if (sym != NULL) | |
438 | return sym; | |
8540c487 SW |
439 | } |
440 | } | |
441 | ||
442 | return NULL; | |
443 | } | |
444 | ||
34eaf542 TT |
445 | /* Helper function that searches an array of symbols for one named |
446 | NAME. */ | |
447 | ||
448 | static struct symbol * | |
aff410f1 MS |
449 | search_symbol_list (const char *name, int num, |
450 | struct symbol **syms) | |
34eaf542 TT |
451 | { |
452 | int i; | |
453 | ||
454 | /* Maybe we should store a dictionary in here instead. */ | |
455 | for (i = 0; i < num; ++i) | |
456 | { | |
457 | if (strcmp (name, SYMBOL_NATURAL_NAME (syms[i])) == 0) | |
458 | return syms[i]; | |
459 | } | |
460 | return NULL; | |
461 | } | |
462 | ||
463 | /* Like cp_lookup_symbol_imports, but if BLOCK is a function, it | |
464 | searches through the template parameters of the function and the | |
465 | function's type. */ | |
466 | ||
467 | struct symbol * | |
468 | cp_lookup_symbol_imports_or_template (const char *scope, | |
469 | const char *name, | |
470 | const struct block *block, | |
471 | const domain_enum domain) | |
472 | { | |
473 | struct symbol *function = BLOCK_FUNCTION (block); | |
474 | ||
475 | if (function != NULL && SYMBOL_LANGUAGE (function) == language_cplus) | |
476 | { | |
477 | int i; | |
478 | struct cplus_specific *cps | |
479 | = function->ginfo.language_specific.cplus_specific; | |
480 | ||
481 | /* Search the function's template parameters. */ | |
482 | if (SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION (function)) | |
483 | { | |
aff410f1 MS |
484 | struct template_symbol *templ |
485 | = (struct template_symbol *) function; | |
34eaf542 TT |
486 | struct symbol *result; |
487 | ||
488 | result = search_symbol_list (name, | |
489 | templ->n_template_arguments, | |
490 | templ->template_arguments); | |
491 | if (result != NULL) | |
492 | return result; | |
493 | } | |
494 | ||
495 | /* Search the template parameters of the function's defining | |
496 | context. */ | |
497 | if (SYMBOL_NATURAL_NAME (function)) | |
498 | { | |
499 | struct type *context; | |
500 | char *name_copy = xstrdup (SYMBOL_NATURAL_NAME (function)); | |
501 | struct cleanup *cleanups = make_cleanup (xfree, name_copy); | |
502 | const struct language_defn *lang = language_def (language_cplus); | |
503 | struct gdbarch *arch = SYMBOL_SYMTAB (function)->objfile->gdbarch; | |
504 | const struct block *parent = BLOCK_SUPERBLOCK (block); | |
505 | ||
506 | while (1) | |
507 | { | |
508 | struct symbol *result; | |
509 | unsigned int prefix_len = cp_entire_prefix_len (name_copy); | |
510 | ||
511 | if (prefix_len == 0) | |
512 | context = NULL; | |
513 | else | |
514 | { | |
515 | name_copy[prefix_len] = '\0'; | |
aff410f1 MS |
516 | context = lookup_typename (lang, arch, |
517 | name_copy, | |
518 | parent, 1); | |
34eaf542 TT |
519 | } |
520 | ||
521 | if (context == NULL) | |
522 | break; | |
523 | ||
aff410f1 MS |
524 | result |
525 | = search_symbol_list (name, | |
526 | TYPE_N_TEMPLATE_ARGUMENTS (context), | |
527 | TYPE_TEMPLATE_ARGUMENTS (context)); | |
34eaf542 TT |
528 | if (result != NULL) |
529 | return result; | |
530 | } | |
531 | ||
532 | do_cleanups (cleanups); | |
533 | } | |
534 | } | |
535 | ||
536 | return cp_lookup_symbol_imports (scope, name, block, domain, 1, 1); | |
537 | } | |
538 | ||
aff410f1 MS |
539 | /* Searches for NAME in the current namespace, and by applying |
540 | relevant import statements belonging to BLOCK and its parents. | |
541 | SCOPE is the namespace scope of the context in which the search is | |
542 | being evaluated. */ | |
8540c487 SW |
543 | |
544 | struct symbol* | |
545 | cp_lookup_symbol_namespace (const char *scope, | |
546 | const char *name, | |
8540c487 | 547 | const struct block *block, |
13387711 | 548 | const domain_enum domain) |
8540c487 SW |
549 | { |
550 | struct symbol *sym; | |
13387711 SW |
551 | |
552 | /* First, try to find the symbol in the given namespace. */ | |
aff410f1 | 553 | sym = cp_lookup_symbol_in_namespace (scope, name, |
8dea366b | 554 | block, domain, 1); |
13387711 SW |
555 | if (sym != NULL) |
556 | return sym; | |
8540c487 | 557 | |
aff410f1 MS |
558 | /* Search for name in namespaces imported to this and parent |
559 | blocks. */ | |
8540c487 SW |
560 | while (block != NULL) |
561 | { | |
aff410f1 MS |
562 | sym = cp_lookup_symbol_imports (scope, name, block, |
563 | domain, 0, 1); | |
8540c487 SW |
564 | |
565 | if (sym) | |
566 | return sym; | |
567 | ||
568 | block = BLOCK_SUPERBLOCK (block); | |
569 | } | |
570 | ||
571 | return NULL; | |
1fcb5155 DC |
572 | } |
573 | ||
574 | /* Lookup NAME at namespace scope (or, in C terms, in static and | |
575 | global variables). SCOPE is the namespace that the current | |
576 | function is defined within; only consider namespaces whose length | |
577 | is at least SCOPE_LEN. Other arguments are as in | |
578 | cp_lookup_symbol_nonlocal. | |
579 | ||
580 | For example, if we're within a function A::B::f and looking for a | |
3882f37a | 581 | symbol x, this will get called with NAME = "x", SCOPE = "A::B", and |
1fcb5155 DC |
582 | SCOPE_LEN = 0. It then calls itself with NAME and SCOPE the same, |
583 | but with SCOPE_LEN = 1. And then it calls itself with NAME and | |
584 | SCOPE the same, but with SCOPE_LEN = 4. This third call looks for | |
585 | "A::B::x"; if it doesn't find it, then the second call looks for | |
586 | "A::x", and if that call fails, then the first call looks for | |
587 | "x". */ | |
588 | ||
589 | static struct symbol * | |
590 | lookup_namespace_scope (const char *name, | |
1fcb5155 DC |
591 | const struct block *block, |
592 | const domain_enum domain, | |
1fcb5155 DC |
593 | const char *scope, |
594 | int scope_len) | |
595 | { | |
596 | char *namespace; | |
597 | ||
598 | if (scope[scope_len] != '\0') | |
599 | { | |
600 | /* Recursively search for names in child namespaces first. */ | |
601 | ||
602 | struct symbol *sym; | |
603 | int new_scope_len = scope_len; | |
604 | ||
605 | /* If the current scope is followed by "::", skip past that. */ | |
606 | if (new_scope_len != 0) | |
607 | { | |
608 | gdb_assert (scope[new_scope_len] == ':'); | |
609 | new_scope_len += 2; | |
610 | } | |
611 | new_scope_len += cp_find_first_component (scope + new_scope_len); | |
aff410f1 MS |
612 | sym = lookup_namespace_scope (name, block, domain, |
613 | scope, new_scope_len); | |
1fcb5155 DC |
614 | if (sym != NULL) |
615 | return sym; | |
616 | } | |
617 | ||
618 | /* Okay, we didn't find a match in our children, so look for the | |
619 | name in the current namespace. */ | |
620 | ||
621 | namespace = alloca (scope_len + 1); | |
622 | strncpy (namespace, scope, scope_len); | |
623 | namespace[scope_len] = '\0'; | |
aff410f1 | 624 | return cp_lookup_symbol_in_namespace (namespace, name, |
8dea366b | 625 | block, domain, 1); |
1fcb5155 DC |
626 | } |
627 | ||
628 | /* Look up NAME in BLOCK's static block and in global blocks. If | |
629 | ANONYMOUS_NAMESPACE is nonzero, the symbol in question is located | |
8dea366b KS |
630 | within an anonymous namespace. If SEARCH is non-zero, search through |
631 | base classes for a matching symbol. Other arguments are as in | |
1fcb5155 DC |
632 | cp_lookup_symbol_nonlocal. */ |
633 | ||
634 | static struct symbol * | |
635 | lookup_symbol_file (const char *name, | |
1fcb5155 DC |
636 | const struct block *block, |
637 | const domain_enum domain, | |
8dea366b | 638 | int anonymous_namespace, int search) |
1fcb5155 DC |
639 | { |
640 | struct symbol *sym = NULL; | |
641 | ||
94af9270 | 642 | sym = lookup_symbol_static (name, block, domain); |
1fcb5155 DC |
643 | if (sym != NULL) |
644 | return sym; | |
645 | ||
646 | if (anonymous_namespace) | |
647 | { | |
648 | /* Symbols defined in anonymous namespaces have external linkage | |
649 | but should be treated as local to a single file nonetheless. | |
650 | So we only search the current file's global block. */ | |
651 | ||
652 | const struct block *global_block = block_global_block (block); | |
653 | ||
654 | if (global_block != NULL) | |
94af9270 | 655 | sym = lookup_symbol_aux_block (name, global_block, domain); |
1fcb5155 DC |
656 | } |
657 | else | |
658 | { | |
94af9270 | 659 | sym = lookup_symbol_global (name, block, domain); |
5c4e30ca DC |
660 | } |
661 | ||
8dea366b KS |
662 | if (sym != NULL) |
663 | return sym; | |
664 | ||
665 | if (search) | |
666 | { | |
667 | char *klass, *nested; | |
668 | unsigned int prefix_len; | |
669 | struct cleanup *cleanup; | |
670 | struct symbol *klass_sym; | |
671 | ||
672 | /* A simple lookup failed. Check if the symbol was defined in | |
673 | a base class. */ | |
674 | ||
675 | cleanup = make_cleanup (null_cleanup, NULL); | |
676 | ||
677 | /* Find the name of the class and the name of the method, | |
678 | variable, etc. */ | |
679 | prefix_len = cp_entire_prefix_len (name); | |
680 | ||
681 | /* If no prefix was found, search "this". */ | |
682 | if (prefix_len == 0) | |
683 | { | |
684 | struct type *type; | |
685 | struct symbol *this; | |
686 | ||
687 | this = lookup_language_this (language_def (language_cplus), block); | |
688 | if (this == NULL) | |
689 | { | |
690 | do_cleanups (cleanup); | |
691 | return NULL; | |
692 | } | |
693 | ||
694 | type = check_typedef (TYPE_TARGET_TYPE (SYMBOL_TYPE (this))); | |
695 | klass = xstrdup (TYPE_NAME (type)); | |
696 | nested = xstrdup (name); | |
697 | } | |
698 | else | |
699 | { | |
700 | /* The class name is everything up to and including PREFIX_LEN. */ | |
701 | klass = savestring (name, prefix_len); | |
702 | ||
703 | /* The rest of the name is everything else past the initial scope | |
704 | operator. */ | |
705 | nested = xstrdup (name + prefix_len + 2); | |
706 | } | |
707 | ||
708 | /* Add cleanups to free memory for these strings. */ | |
709 | make_cleanup (xfree, klass); | |
710 | make_cleanup (xfree, nested); | |
711 | ||
712 | /* Lookup a class named KLASS. If none is found, there is nothing | |
713 | more that can be done. */ | |
714 | klass_sym = lookup_symbol_global (klass, block, domain); | |
715 | if (klass_sym == NULL) | |
716 | { | |
717 | do_cleanups (cleanup); | |
718 | return NULL; | |
719 | } | |
720 | ||
721 | /* Look for a symbol named NESTED in this class. */ | |
722 | sym = cp_lookup_nested_symbol (SYMBOL_TYPE (klass_sym), nested, block); | |
723 | do_cleanups (cleanup); | |
724 | } | |
725 | ||
726 | return sym; | |
727 | } | |
728 | ||
729 | /* Search through the base classes of PARENT_TYPE for a symbol named | |
730 | NAME in block BLOCK. */ | |
731 | ||
732 | static struct symbol * | |
733 | find_symbol_in_baseclass (struct type *parent_type, const char *name, | |
734 | const struct block *block) | |
735 | { | |
736 | int i; | |
737 | struct symbol *sym; | |
738 | struct cleanup *cleanup; | |
739 | char *concatenated_name; | |
740 | ||
741 | sym = NULL; | |
742 | concatenated_name = NULL; | |
743 | cleanup = make_cleanup (free_current_contents, &concatenated_name); | |
744 | for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i) | |
745 | { | |
746 | size_t len; | |
747 | const char *base_name = TYPE_BASECLASS_NAME (parent_type, i); | |
748 | ||
749 | if (base_name == NULL) | |
750 | continue; | |
751 | ||
752 | /* Search this particular base class. */ | |
753 | sym = cp_lookup_symbol_namespace (base_name, name, block, VAR_DOMAIN); | |
754 | if (sym != NULL) | |
755 | break; | |
756 | ||
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); | |
760 | sym = lookup_symbol_static (concatenated_name, block, VAR_DOMAIN); | |
761 | ||
762 | /* If there is currently no BLOCK, e.g., the inferior hasn't yet | |
763 | been started, then try searching all STATIC_BLOCK symbols in | |
764 | all objfiles. */ | |
765 | if (block == NULL) | |
766 | { | |
767 | sym = lookup_static_symbol_aux (concatenated_name, VAR_DOMAIN); | |
768 | if (sym != NULL) | |
769 | break; | |
770 | } | |
771 | ||
772 | /* If this class has base classes, search them next. */ | |
773 | if (TYPE_N_BASECLASSES (TYPE_BASECLASS (parent_type, i)) > 0) | |
774 | { | |
775 | sym = find_symbol_in_baseclass (TYPE_BASECLASS (parent_type, i), | |
776 | name, block); | |
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 DC |
787 | class or namespace given by PARENT_TYPE, from within the context |
788 | given by BLOCK. Return NULL if there is no such nested type. */ | |
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 | { |
d8228535 JK |
795 | /* type_name_no_tag_required provides better error reporting using the |
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: |
79c2c32d | 806 | { |
63d06c5c DC |
807 | /* NOTE: carlton/2003-11-10: We don't treat C++ class members |
808 | of classes like, say, data or function members. Instead, | |
809 | they're just represented by symbols whose names are | |
810 | qualified by the name of the surrounding class. This is | |
811 | just like members of namespaces; in particular, | |
812 | lookup_symbol_namespace works when looking them up. */ | |
813 | ||
08850b56 | 814 | int size; |
d8228535 | 815 | const char *parent_name = type_name_no_tag_or_error (saved_parent_type); |
aff410f1 MS |
816 | struct symbol *sym |
817 | = cp_lookup_symbol_in_namespace (parent_name, nested_name, | |
8dea366b | 818 | block, VAR_DOMAIN, 0); |
41f62f39 | 819 | char *concatenated_name; |
c5504eaf | 820 | |
50af5481 JK |
821 | if (sym != NULL) |
822 | return sym; | |
41f62f39 | 823 | |
aff410f1 MS |
824 | /* Now search all static file-level symbols. Not strictly |
825 | correct, but more useful than an error. We do not try to | |
826 | guess any imported namespace as even the fully specified | |
8dea366b | 827 | namespace search is already not C++ compliant and more |
aff410f1 | 828 | assumptions could make it too magic. */ |
41f62f39 | 829 | |
08850b56 PM |
830 | size = strlen (parent_name) + 2 + strlen (nested_name) + 1; |
831 | concatenated_name = alloca (size); | |
832 | xsnprintf (concatenated_name, size, "%s::%s", | |
aff410f1 | 833 | parent_name, nested_name); |
50af5481 JK |
834 | sym = lookup_static_symbol_aux (concatenated_name, VAR_DOMAIN); |
835 | if (sym != NULL) | |
836 | return sym; | |
41f62f39 | 837 | |
8dea366b KS |
838 | /* If no matching symbols were found, try searching any |
839 | base classes. */ | |
840 | return find_symbol_in_baseclass (parent_type, nested_name, block); | |
79c2c32d DC |
841 | } |
842 | default: | |
843 | internal_error (__FILE__, __LINE__, | |
50af5481 | 844 | _("cp_lookup_nested_symbol called " |
3e43a32a | 845 | "on a non-aggregate type.")); |
79c2c32d DC |
846 | } |
847 | } | |
848 | ||
b368761e DC |
849 | /* The C++-version of lookup_transparent_type. */ |
850 | ||
851 | /* FIXME: carlton/2004-01-16: The problem that this is trying to | |
852 | address is that, unfortunately, sometimes NAME is wrong: it may not | |
853 | include the name of namespaces enclosing the type in question. | |
b021a221 | 854 | lookup_transparent_type gets called when the type in question |
b368761e DC |
855 | is a declaration, and we're trying to find its definition; but, for |
856 | declarations, our type name deduction mechanism doesn't work. | |
857 | There's nothing we can do to fix this in general, I think, in the | |
858 | absence of debug information about namespaces (I've filed PR | |
859 | gdb/1511 about this); until such debug information becomes more | |
860 | prevalent, one heuristic which sometimes looks is to search for the | |
861 | definition in namespaces containing the current namespace. | |
862 | ||
863 | We should delete this functions once the appropriate debug | |
864 | information becomes more widespread. (GCC 3.4 will be the first | |
865 | released version of GCC with such information.) */ | |
866 | ||
867 | struct type * | |
868 | cp_lookup_transparent_type (const char *name) | |
869 | { | |
870 | /* First, try the honest way of looking up the definition. */ | |
871 | struct type *t = basic_lookup_transparent_type (name); | |
872 | const char *scope; | |
873 | ||
874 | if (t != NULL) | |
875 | return t; | |
876 | ||
877 | /* If that doesn't work and we're within a namespace, look there | |
878 | instead. */ | |
879 | scope = block_scope (get_selected_block (0)); | |
880 | ||
881 | if (scope[0] == '\0') | |
882 | return NULL; | |
883 | ||
884 | return cp_lookup_transparent_type_loop (name, scope, 0); | |
885 | } | |
886 | ||
b021a221 MS |
887 | /* Lookup the type definition associated to NAME in namespaces/classes |
888 | containing SCOPE whose name is strictly longer than LENGTH. LENGTH | |
889 | must be the index of the start of a component of SCOPE. */ | |
b368761e DC |
890 | |
891 | static struct type * | |
aff410f1 MS |
892 | cp_lookup_transparent_type_loop (const char *name, |
893 | const char *scope, | |
b368761e DC |
894 | int length) |
895 | { | |
1198ecbe | 896 | int scope_length = length + cp_find_first_component (scope + length); |
b368761e DC |
897 | char *full_name; |
898 | ||
899 | /* If the current scope is followed by "::", look in the next | |
900 | component. */ | |
901 | if (scope[scope_length] == ':') | |
902 | { | |
903 | struct type *retval | |
aff410f1 MS |
904 | = cp_lookup_transparent_type_loop (name, scope, |
905 | scope_length + 2); | |
c5504eaf | 906 | |
b368761e DC |
907 | if (retval != NULL) |
908 | return retval; | |
909 | } | |
910 | ||
911 | full_name = alloca (scope_length + 2 + strlen (name) + 1); | |
912 | strncpy (full_name, scope, scope_length); | |
913 | strncpy (full_name + scope_length, "::", 2); | |
914 | strcpy (full_name + scope_length + 2, name); | |
915 | ||
916 | return basic_lookup_transparent_type (full_name); | |
917 | } | |
918 | ||
0c2e6019 TT |
919 | /* This used to do something but was removed when it became |
920 | obsolete. */ | |
5c4e30ca DC |
921 | |
922 | static void | |
923 | maintenance_cplus_namespace (char *args, int from_tty) | |
924 | { | |
0c2e6019 | 925 | printf_unfiltered (_("The `maint namespace' command was removed.\n")); |
5c4e30ca DC |
926 | } |
927 | ||
2c0b251b PA |
928 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
929 | extern initialize_file_ftype _initialize_cp_namespace; | |
930 | ||
5c4e30ca DC |
931 | void |
932 | _initialize_cp_namespace (void) | |
933 | { | |
0c2e6019 TT |
934 | struct cmd_list_element *cmd; |
935 | ||
936 | cmd = add_cmd ("namespace", class_maintenance, | |
937 | maintenance_cplus_namespace, | |
938 | _("Deprecated placeholder for removed functionality."), | |
939 | &maint_cplus_cmd_list); | |
940 | deprecate_cmd (cmd, NULL); | |
1fcb5155 | 941 | } |