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9219021c | 1 | /* Helper routines for C++ support in GDB. |
4c38e0a4 JB |
2 | Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010 |
3 | Free Software Foundation, Inc. | |
9219021c | 4 | |
1fcb5155 | 5 | Contributed by David Carlton and by Kealia, Inc. |
9219021c DC |
6 | |
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
9219021c DC |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
9219021c DC |
21 | |
22 | #include "defs.h" | |
23 | #include "cp-support.h" | |
24 | #include "gdb_obstack.h" | |
25 | #include "symtab.h" | |
26 | #include "symfile.h" | |
27 | #include "gdb_assert.h" | |
28 | #include "block.h" | |
5c4e30ca DC |
29 | #include "objfiles.h" |
30 | #include "gdbtypes.h" | |
31 | #include "dictionary.h" | |
32 | #include "command.h" | |
b368761e | 33 | #include "frame.h" |
27aa8d6a | 34 | #include "buildsym.h" |
34eaf542 | 35 | #include "language.h" |
9219021c | 36 | |
1fcb5155 | 37 | static struct symbol *lookup_namespace_scope (const char *name, |
1fcb5155 DC |
38 | const struct block *block, |
39 | const domain_enum domain, | |
1fcb5155 DC |
40 | const char *scope, |
41 | int scope_len); | |
42 | ||
43 | static struct symbol *lookup_symbol_file (const char *name, | |
1fcb5155 DC |
44 | const struct block *block, |
45 | const domain_enum domain, | |
1fcb5155 DC |
46 | int anonymous_namespace); |
47 | ||
b368761e DC |
48 | static struct type *cp_lookup_transparent_type_loop (const char *name, |
49 | const char *scope, | |
50 | int scope_len); | |
51 | ||
5c4e30ca DC |
52 | static void initialize_namespace_symtab (struct objfile *objfile); |
53 | ||
54 | static struct block *get_possible_namespace_block (struct objfile *objfile); | |
55 | ||
56 | static void free_namespace_block (struct symtab *symtab); | |
57 | ||
58 | static int check_possible_namespace_symbols_loop (const char *name, | |
59 | int len, | |
60 | struct objfile *objfile); | |
61 | ||
62 | static int check_one_possible_namespace_symbol (const char *name, | |
63 | int len, | |
64 | struct objfile *objfile); | |
65 | ||
21b556f4 | 66 | static struct symbol *lookup_possible_namespace_symbol (const char *name); |
5c4e30ca DC |
67 | |
68 | static void maintenance_cplus_namespace (char *args, int from_tty); | |
69 | ||
9219021c DC |
70 | /* Check to see if SYMBOL refers to an object contained within an |
71 | anonymous namespace; if so, add an appropriate using directive. */ | |
72 | ||
73 | /* Optimize away strlen ("(anonymous namespace)"). */ | |
74 | ||
75 | #define ANONYMOUS_NAMESPACE_LEN 21 | |
76 | ||
77 | void | |
78 | cp_scan_for_anonymous_namespaces (const struct symbol *symbol) | |
79 | { | |
df8a16a1 | 80 | if (SYMBOL_DEMANGLED_NAME (symbol) != NULL) |
9219021c | 81 | { |
df8a16a1 | 82 | const char *name = SYMBOL_DEMANGLED_NAME (symbol); |
9219021c DC |
83 | unsigned int previous_component; |
84 | unsigned int next_component; | |
9219021c DC |
85 | |
86 | /* Start with a quick-and-dirty check for mention of "(anonymous | |
87 | namespace)". */ | |
88 | ||
89 | if (!cp_is_anonymous (name)) | |
90 | return; | |
91 | ||
92 | previous_component = 0; | |
93 | next_component = cp_find_first_component (name + previous_component); | |
94 | ||
95 | while (name[next_component] == ':') | |
96 | { | |
97 | if ((next_component - previous_component) == ANONYMOUS_NAMESPACE_LEN | |
98 | && strncmp (name + previous_component, | |
99 | "(anonymous namespace)", | |
100 | ANONYMOUS_NAMESPACE_LEN) == 0) | |
101 | { | |
8c902bb1 SW |
102 | int dest_len = (previous_component == 0 ? 0 : previous_component - 2); |
103 | int src_len = next_component; | |
794684b6 | 104 | |
8c902bb1 SW |
105 | char *dest = alloca (dest_len + 1); |
106 | char *src = alloca (src_len + 1); | |
794684b6 | 107 | |
8c902bb1 SW |
108 | memcpy (dest, name, dest_len); |
109 | memcpy (src, name, src_len); | |
794684b6 | 110 | |
8c902bb1 SW |
111 | dest[dest_len] = '\0'; |
112 | src[src_len] = '\0'; | |
794684b6 | 113 | |
9219021c DC |
114 | /* We've found a component of the name that's an |
115 | anonymous namespace. So add symbols in it to the | |
116 | namespace given by the previous component if there is | |
117 | one, or to the global namespace if there isn't. */ | |
13387711 | 118 | cp_add_using_directive (dest, src, NULL, NULL, |
c0cc3a76 | 119 | &SYMBOL_SYMTAB (symbol)->objfile->objfile_obstack); |
9219021c DC |
120 | } |
121 | /* The "+ 2" is for the "::". */ | |
122 | previous_component = next_component + 2; | |
123 | next_component = (previous_component | |
124 | + cp_find_first_component (name | |
125 | + previous_component)); | |
126 | } | |
127 | } | |
128 | } | |
129 | ||
c0cc3a76 SW |
130 | |
131 | /* Add a using directive to using_directives. If the using directive in | |
132 | question has already been added, don't add it twice. | |
133 | Create a new struct using_direct which imports the namespace SRC into the | |
134 | scope DEST. ALIAS is the name of the imported namespace in the current | |
135 | scope. If ALIAS is NULL then the namespace is known by its original name. | |
13387711 SW |
136 | DECLARATION is the name if the imported varable if this is a declaration |
137 | import (Eg. using A::x), otherwise it is NULL. The arguments are copied | |
138 | into newly allocated memory so they can be temporaries. */ | |
9219021c DC |
139 | |
140 | void | |
13387711 SW |
141 | cp_add_using_directive (const char *dest, |
142 | const char *src, | |
143 | const char *alias, | |
144 | const char *declaration, | |
c0cc3a76 | 145 | struct obstack *obstack) |
9219021c DC |
146 | { |
147 | struct using_direct *current; | |
148 | struct using_direct *new; | |
13387711 | 149 | |
9219021c DC |
150 | /* Has it already been added? */ |
151 | ||
27aa8d6a | 152 | for (current = using_directives; current != NULL; current = current->next) |
9219021c | 153 | { |
8c902bb1 | 154 | if (strcmp (current->import_src, src) == 0 |
c0cc3a76 SW |
155 | && strcmp (current->import_dest, dest) == 0 |
156 | && ((alias == NULL && current->alias == NULL) | |
157 | || (alias != NULL && current->alias != NULL | |
13387711 SW |
158 | && strcmp (alias, current->alias) == 0)) |
159 | && ((declaration == NULL && current->declaration == NULL) | |
160 | || (declaration != NULL && current->declaration != NULL | |
161 | && strcmp (declaration, current->declaration) == 0))) | |
9219021c DC |
162 | return; |
163 | } | |
164 | ||
c0cc3a76 SW |
165 | new = OBSTACK_ZALLOC (obstack, struct using_direct); |
166 | ||
167 | new->import_src = obsavestring (src, strlen (src), obstack); | |
168 | new->import_dest = obsavestring (dest, strlen (dest), obstack); | |
794684b6 | 169 | |
c0cc3a76 SW |
170 | if (alias != NULL) |
171 | new->alias = obsavestring (alias, strlen (alias), obstack); | |
172 | ||
13387711 SW |
173 | if (declaration != NULL) |
174 | new->declaration = obsavestring (declaration, strlen (declaration), | |
175 | obstack); | |
176 | ||
c0cc3a76 SW |
177 | new->next = using_directives; |
178 | using_directives = new; | |
9219021c DC |
179 | } |
180 | ||
181 | /* Record the namespace that the function defined by SYMBOL was | |
182 | defined in, if necessary. BLOCK is the associated block; use | |
183 | OBSTACK for allocation. */ | |
184 | ||
185 | void | |
186 | cp_set_block_scope (const struct symbol *symbol, | |
187 | struct block *block, | |
df8a16a1 DJ |
188 | struct obstack *obstack, |
189 | const char *processing_current_prefix, | |
190 | int processing_has_namespace_info) | |
9219021c | 191 | { |
df8a16a1 | 192 | if (processing_has_namespace_info) |
9219021c | 193 | { |
df8a16a1 DJ |
194 | block_set_scope |
195 | (block, obsavestring (processing_current_prefix, | |
196 | strlen (processing_current_prefix), | |
197 | obstack), | |
198 | obstack); | |
199 | } | |
200 | else if (SYMBOL_DEMANGLED_NAME (symbol) != NULL) | |
201 | { | |
202 | /* Try to figure out the appropriate namespace from the | |
203 | demangled name. */ | |
9219021c | 204 | |
df8a16a1 DJ |
205 | /* FIXME: carlton/2003-04-15: If the function in question is |
206 | a method of a class, the name will actually include the | |
207 | name of the class as well. This should be harmless, but | |
208 | is a little unfortunate. */ | |
9219021c | 209 | |
df8a16a1 DJ |
210 | const char *name = SYMBOL_DEMANGLED_NAME (symbol); |
211 | unsigned int prefix_len = cp_entire_prefix_len (name); | |
9219021c | 212 | |
df8a16a1 DJ |
213 | block_set_scope (block, |
214 | obsavestring (name, prefix_len, obstack), | |
215 | obstack); | |
9219021c DC |
216 | } |
217 | } | |
218 | ||
219 | /* Test whether or not NAMESPACE looks like it mentions an anonymous | |
220 | namespace; return nonzero if so. */ | |
221 | ||
222 | int | |
223 | cp_is_anonymous (const char *namespace) | |
224 | { | |
225 | return (strstr (namespace, "(anonymous namespace)") | |
226 | != NULL); | |
227 | } | |
228 | ||
1fcb5155 DC |
229 | /* The C++-specific version of name lookup for static and global |
230 | names. This makes sure that names get looked for in all namespaces | |
231 | that are in scope. NAME is the natural name of the symbol that | |
94af9270 KS |
232 | we're looking for, BLOCK is the block that we're searching within, |
233 | DOMAIN says what kind of symbols we're looking for, and if SYMTAB is | |
234 | non-NULL, we should store the symtab where we found the symbol in it. */ | |
1fcb5155 DC |
235 | |
236 | struct symbol * | |
237 | cp_lookup_symbol_nonlocal (const char *name, | |
1fcb5155 | 238 | const struct block *block, |
21b556f4 | 239 | const domain_enum domain) |
1fcb5155 | 240 | { |
8540c487 SW |
241 | struct symbol *sym; |
242 | const char *scope = block_scope (block); | |
243 | ||
94af9270 | 244 | sym = lookup_namespace_scope (name, block, domain, scope, 0); |
8540c487 SW |
245 | if (sym != NULL) |
246 | return sym; | |
247 | ||
13387711 | 248 | return cp_lookup_symbol_namespace (scope, name, block, domain); |
8540c487 SW |
249 | } |
250 | ||
13387711 | 251 | /* Look up NAME in the C++ namespace NAMESPACE. Other arguments are as in |
8540c487 SW |
252 | cp_lookup_symbol_nonlocal. */ |
253 | ||
254 | static struct symbol * | |
255 | cp_lookup_symbol_in_namespace (const char *namespace, | |
256 | const char *name, | |
8540c487 SW |
257 | const struct block *block, |
258 | const domain_enum domain) | |
259 | { | |
260 | if (namespace[0] == '\0') | |
261 | { | |
94af9270 | 262 | return lookup_symbol_file (name, block, domain, 0); |
8540c487 SW |
263 | } |
264 | else | |
265 | { | |
266 | char *concatenated_name = alloca (strlen (namespace) + 2 + | |
72f6eb52 | 267 | strlen (name) + 1); |
c5504eaf | 268 | |
8540c487 SW |
269 | strcpy (concatenated_name, namespace); |
270 | strcat (concatenated_name, "::"); | |
271 | strcat (concatenated_name, name); | |
94af9270 | 272 | return lookup_symbol_file (concatenated_name, block, |
72f6eb52 | 273 | domain, cp_is_anonymous (namespace)); |
8540c487 SW |
274 | } |
275 | } | |
276 | ||
b14e635e SW |
277 | /* Used for cleanups to reset the "searched" flag incase |
278 | of an error. */ | |
279 | ||
280 | static void | |
281 | reset_directive_searched (void *data) | |
282 | { | |
283 | struct using_direct *direct = data; | |
284 | direct->searched = 0; | |
285 | } | |
286 | ||
8540c487 | 287 | /* Search for NAME by applying all import statements belonging |
13387711 SW |
288 | to BLOCK which are applicable in SCOPE. If DECLARATION_ONLY the search |
289 | is restricted to using declarations. | |
290 | Example: | |
291 | ||
292 | namespace A{ | |
293 | int x; | |
294 | } | |
295 | using A::x; | |
296 | ||
b14e635e SW |
297 | If SEARCH_PARENTS the search will include imports which are applicable in |
298 | parents of SCOPE. | |
299 | Example: | |
300 | ||
301 | namespace A{ | |
302 | using namespace X; | |
303 | namespace B{ | |
304 | using namespace Y; | |
305 | } | |
306 | } | |
307 | ||
308 | If SCOPE is "A::B" and SEARCH_PARENTS is true the imports of namespaces X | |
13387711 | 309 | and Y will be considered. If SEARCH_PARENTS is false only the import of Y |
b14e635e | 310 | is considered. */ |
8540c487 | 311 | |
13387711 | 312 | struct symbol * |
8540c487 SW |
313 | cp_lookup_symbol_imports (const char *scope, |
314 | const char *name, | |
8540c487 | 315 | const struct block *block, |
b14e635e | 316 | const domain_enum domain, |
13387711 | 317 | const int declaration_only, |
b14e635e | 318 | const int search_parents) |
8540c487 | 319 | { |
b14e635e | 320 | struct using_direct *current; |
13387711 | 321 | struct symbol *sym = NULL; |
8540c487 | 322 | int len; |
b14e635e SW |
323 | int directive_match; |
324 | struct cleanup *searched_cleanup; | |
8540c487 SW |
325 | |
326 | /* First, try to find the symbol in the given namespace. */ | |
13387711 SW |
327 | if (!declaration_only) |
328 | sym = cp_lookup_symbol_in_namespace (scope, name, block, domain); | |
329 | ||
8540c487 SW |
330 | if (sym != NULL) |
331 | return sym; | |
332 | ||
333 | /* Go through the using directives. If any of them add new | |
334 | names to the namespace we're searching in, see if we can find a | |
335 | match by applying them. */ | |
336 | ||
337 | for (current = block_using (block); | |
338 | current != NULL; | |
339 | current = current->next) | |
340 | { | |
b14e635e SW |
341 | len = strlen (current->import_dest); |
342 | directive_match = (search_parents | |
343 | ? (strncmp (scope, current->import_dest, | |
344 | strlen (current->import_dest)) == 0 | |
345 | && (len == 0 | |
346 | || scope[len] == ':' || scope[len] == '\0')) | |
347 | : strcmp (scope, current->import_dest) == 0); | |
8540c487 SW |
348 | |
349 | /* If the import destination is the current scope or one of its ancestors then | |
350 | it is applicable. */ | |
b14e635e | 351 | if (directive_match && !current->searched) |
8540c487 | 352 | { |
b14e635e SW |
353 | /* Mark this import as searched so that the recursive call does not |
354 | search it again. */ | |
355 | current->searched = 1; | |
356 | searched_cleanup = make_cleanup (reset_directive_searched, current); | |
357 | ||
13387711 | 358 | /* If there is an import of a single declaration, compare the imported |
1ac77ea1 JK |
359 | declaration (after optional renaming by its alias) with the sought |
360 | out name. If there is a match pass current->import_src as NAMESPACE | |
361 | to direct the search towards the imported namespace. */ | |
362 | if (current->declaration | |
363 | && strcmp (name, current->alias ? current->alias | |
364 | : current->declaration) == 0) | |
13387711 | 365 | sym = cp_lookup_symbol_in_namespace (current->import_src, |
1ac77ea1 | 366 | current->declaration, |
13387711 SW |
367 | block, |
368 | domain); | |
369 | ||
370 | /* If this is a DECLARATION_ONLY search or a symbol was found or | |
371 | this import statement was an import declaration, the search | |
372 | of this import is complete. */ | |
373 | if (declaration_only || sym != NULL || current->declaration) | |
374 | { | |
375 | current->searched = 0; | |
376 | discard_cleanups (searched_cleanup); | |
377 | ||
378 | if (sym != NULL) | |
379 | return sym; | |
380 | ||
381 | continue; | |
382 | } | |
383 | ||
82856980 SW |
384 | if (current->alias != NULL && strcmp (name, current->alias) == 0) |
385 | /* If the import is creating an alias and the alias matches the | |
386 | sought name. Pass current->import_src as the NAME to direct the | |
387 | search towards the aliased namespace. */ | |
388 | { | |
389 | sym = cp_lookup_symbol_in_namespace (scope, | |
390 | current->import_src, | |
82856980 SW |
391 | block, |
392 | domain); | |
393 | } | |
394 | else if (current->alias == NULL) | |
395 | { | |
396 | /* If this import statement creates no alias, pass current->inner as | |
397 | NAMESPACE to direct the search towards the imported namespace. */ | |
398 | sym = cp_lookup_symbol_imports (current->import_src, | |
399 | name, | |
82856980 SW |
400 | block, |
401 | domain, | |
13387711 | 402 | 0, |
82856980 SW |
403 | 0); |
404 | } | |
b14e635e SW |
405 | current->searched = 0; |
406 | discard_cleanups (searched_cleanup); | |
407 | ||
408 | if (sym != NULL) | |
409 | return sym; | |
8540c487 SW |
410 | } |
411 | } | |
412 | ||
413 | return NULL; | |
414 | } | |
415 | ||
34eaf542 TT |
416 | /* Helper function that searches an array of symbols for one named |
417 | NAME. */ | |
418 | ||
419 | static struct symbol * | |
420 | search_symbol_list (const char *name, int num, struct symbol **syms) | |
421 | { | |
422 | int i; | |
423 | ||
424 | /* Maybe we should store a dictionary in here instead. */ | |
425 | for (i = 0; i < num; ++i) | |
426 | { | |
427 | if (strcmp (name, SYMBOL_NATURAL_NAME (syms[i])) == 0) | |
428 | return syms[i]; | |
429 | } | |
430 | return NULL; | |
431 | } | |
432 | ||
433 | /* Like cp_lookup_symbol_imports, but if BLOCK is a function, it | |
434 | searches through the template parameters of the function and the | |
435 | function's type. */ | |
436 | ||
437 | struct symbol * | |
438 | cp_lookup_symbol_imports_or_template (const char *scope, | |
439 | const char *name, | |
440 | const struct block *block, | |
441 | const domain_enum domain) | |
442 | { | |
443 | struct symbol *function = BLOCK_FUNCTION (block); | |
444 | ||
445 | if (function != NULL && SYMBOL_LANGUAGE (function) == language_cplus) | |
446 | { | |
447 | int i; | |
448 | struct cplus_specific *cps | |
449 | = function->ginfo.language_specific.cplus_specific; | |
450 | ||
451 | /* Search the function's template parameters. */ | |
452 | if (SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION (function)) | |
453 | { | |
454 | struct template_symbol *templ = (struct template_symbol *) function; | |
455 | struct symbol *result; | |
456 | ||
457 | result = search_symbol_list (name, | |
458 | templ->n_template_arguments, | |
459 | templ->template_arguments); | |
460 | if (result != NULL) | |
461 | return result; | |
462 | } | |
463 | ||
464 | /* Search the template parameters of the function's defining | |
465 | context. */ | |
466 | if (SYMBOL_NATURAL_NAME (function)) | |
467 | { | |
468 | struct type *context; | |
469 | char *name_copy = xstrdup (SYMBOL_NATURAL_NAME (function)); | |
470 | struct cleanup *cleanups = make_cleanup (xfree, name_copy); | |
471 | const struct language_defn *lang = language_def (language_cplus); | |
472 | struct gdbarch *arch = SYMBOL_SYMTAB (function)->objfile->gdbarch; | |
473 | const struct block *parent = BLOCK_SUPERBLOCK (block); | |
474 | ||
475 | while (1) | |
476 | { | |
477 | struct symbol *result; | |
478 | unsigned int prefix_len = cp_entire_prefix_len (name_copy); | |
479 | ||
480 | if (prefix_len == 0) | |
481 | context = NULL; | |
482 | else | |
483 | { | |
484 | name_copy[prefix_len] = '\0'; | |
485 | context = lookup_typename (lang, arch, name_copy, parent, 1); | |
486 | } | |
487 | ||
488 | if (context == NULL) | |
489 | break; | |
490 | ||
491 | result = search_symbol_list (name, | |
492 | TYPE_N_TEMPLATE_ARGUMENTS (context), | |
493 | TYPE_TEMPLATE_ARGUMENTS (context)); | |
494 | if (result != NULL) | |
495 | return result; | |
496 | } | |
497 | ||
498 | do_cleanups (cleanups); | |
499 | } | |
500 | } | |
501 | ||
502 | return cp_lookup_symbol_imports (scope, name, block, domain, 1, 1); | |
503 | } | |
504 | ||
8540c487 SW |
505 | /* Searches for NAME in the current namespace, and by applying relevant import |
506 | statements belonging to BLOCK and its parents. SCOPE is the namespace scope | |
507 | of the context in which the search is being evaluated. */ | |
508 | ||
509 | struct symbol* | |
510 | cp_lookup_symbol_namespace (const char *scope, | |
511 | const char *name, | |
8540c487 | 512 | const struct block *block, |
13387711 | 513 | const domain_enum domain) |
8540c487 SW |
514 | { |
515 | struct symbol *sym; | |
13387711 SW |
516 | |
517 | /* First, try to find the symbol in the given namespace. */ | |
518 | sym = cp_lookup_symbol_in_namespace (scope, name, block, domain); | |
519 | if (sym != NULL) | |
520 | return sym; | |
8540c487 SW |
521 | |
522 | /* Search for name in namespaces imported to this and parent blocks. */ | |
523 | while (block != NULL) | |
524 | { | |
13387711 | 525 | sym = cp_lookup_symbol_imports (scope, name, block, domain, 0, 1); |
8540c487 SW |
526 | |
527 | if (sym) | |
528 | return sym; | |
529 | ||
530 | block = BLOCK_SUPERBLOCK (block); | |
531 | } | |
532 | ||
533 | return NULL; | |
1fcb5155 DC |
534 | } |
535 | ||
536 | /* Lookup NAME at namespace scope (or, in C terms, in static and | |
537 | global variables). SCOPE is the namespace that the current | |
538 | function is defined within; only consider namespaces whose length | |
539 | is at least SCOPE_LEN. Other arguments are as in | |
540 | cp_lookup_symbol_nonlocal. | |
541 | ||
542 | For example, if we're within a function A::B::f and looking for a | |
3882f37a | 543 | symbol x, this will get called with NAME = "x", SCOPE = "A::B", and |
1fcb5155 DC |
544 | SCOPE_LEN = 0. It then calls itself with NAME and SCOPE the same, |
545 | but with SCOPE_LEN = 1. And then it calls itself with NAME and | |
546 | SCOPE the same, but with SCOPE_LEN = 4. This third call looks for | |
547 | "A::B::x"; if it doesn't find it, then the second call looks for | |
548 | "A::x", and if that call fails, then the first call looks for | |
549 | "x". */ | |
550 | ||
551 | static struct symbol * | |
552 | lookup_namespace_scope (const char *name, | |
1fcb5155 DC |
553 | const struct block *block, |
554 | const domain_enum domain, | |
1fcb5155 DC |
555 | const char *scope, |
556 | int scope_len) | |
557 | { | |
558 | char *namespace; | |
559 | ||
560 | if (scope[scope_len] != '\0') | |
561 | { | |
562 | /* Recursively search for names in child namespaces first. */ | |
563 | ||
564 | struct symbol *sym; | |
565 | int new_scope_len = scope_len; | |
566 | ||
567 | /* If the current scope is followed by "::", skip past that. */ | |
568 | if (new_scope_len != 0) | |
569 | { | |
570 | gdb_assert (scope[new_scope_len] == ':'); | |
571 | new_scope_len += 2; | |
572 | } | |
573 | new_scope_len += cp_find_first_component (scope + new_scope_len); | |
94af9270 | 574 | sym = lookup_namespace_scope (name, block, domain, scope, new_scope_len); |
1fcb5155 DC |
575 | if (sym != NULL) |
576 | return sym; | |
577 | } | |
578 | ||
579 | /* Okay, we didn't find a match in our children, so look for the | |
580 | name in the current namespace. */ | |
581 | ||
582 | namespace = alloca (scope_len + 1); | |
583 | strncpy (namespace, scope, scope_len); | |
584 | namespace[scope_len] = '\0'; | |
94af9270 | 585 | return cp_lookup_symbol_in_namespace (namespace, name, block, domain); |
1fcb5155 DC |
586 | } |
587 | ||
588 | /* Look up NAME in BLOCK's static block and in global blocks. If | |
589 | ANONYMOUS_NAMESPACE is nonzero, the symbol in question is located | |
590 | within an anonymous namespace. Other arguments are as in | |
591 | cp_lookup_symbol_nonlocal. */ | |
592 | ||
593 | static struct symbol * | |
594 | lookup_symbol_file (const char *name, | |
1fcb5155 DC |
595 | const struct block *block, |
596 | const domain_enum domain, | |
1fcb5155 DC |
597 | int anonymous_namespace) |
598 | { | |
599 | struct symbol *sym = NULL; | |
600 | ||
94af9270 | 601 | sym = lookup_symbol_static (name, block, domain); |
1fcb5155 DC |
602 | if (sym != NULL) |
603 | return sym; | |
604 | ||
605 | if (anonymous_namespace) | |
606 | { | |
607 | /* Symbols defined in anonymous namespaces have external linkage | |
608 | but should be treated as local to a single file nonetheless. | |
609 | So we only search the current file's global block. */ | |
610 | ||
611 | const struct block *global_block = block_global_block (block); | |
612 | ||
613 | if (global_block != NULL) | |
94af9270 | 614 | sym = lookup_symbol_aux_block (name, global_block, domain); |
1fcb5155 DC |
615 | } |
616 | else | |
617 | { | |
94af9270 | 618 | sym = lookup_symbol_global (name, block, domain); |
5c4e30ca DC |
619 | } |
620 | ||
621 | if (sym != NULL) | |
622 | return sym; | |
623 | ||
624 | /* Now call "lookup_possible_namespace_symbol". Symbols in here | |
625 | claim to be associated to namespaces, but this claim might be | |
626 | incorrect: the names in question might actually correspond to | |
627 | classes instead of namespaces. But if they correspond to | |
628 | classes, then we should have found a match for them above. So if | |
629 | we find them now, they should be genuine. */ | |
630 | ||
631 | /* FIXME: carlton/2003-06-12: This is a hack and should eventually | |
632 | be deleted: see comments below. */ | |
633 | ||
634 | if (domain == VAR_DOMAIN) | |
635 | { | |
21b556f4 | 636 | sym = lookup_possible_namespace_symbol (name); |
5c4e30ca DC |
637 | if (sym != NULL) |
638 | return sym; | |
639 | } | |
640 | ||
641 | return NULL; | |
642 | } | |
643 | ||
79c2c32d DC |
644 | /* Look up a type named NESTED_NAME that is nested inside the C++ |
645 | class or namespace given by PARENT_TYPE, from within the context | |
646 | given by BLOCK. Return NULL if there is no such nested type. */ | |
647 | ||
79c2c32d DC |
648 | struct type * |
649 | cp_lookup_nested_type (struct type *parent_type, | |
650 | const char *nested_name, | |
651 | const struct block *block) | |
652 | { | |
653 | switch (TYPE_CODE (parent_type)) | |
654 | { | |
63d06c5c | 655 | case TYPE_CODE_STRUCT: |
79c2c32d | 656 | case TYPE_CODE_NAMESPACE: |
48e32051 | 657 | case TYPE_CODE_UNION: |
79c2c32d | 658 | { |
63d06c5c DC |
659 | /* NOTE: carlton/2003-11-10: We don't treat C++ class members |
660 | of classes like, say, data or function members. Instead, | |
661 | they're just represented by symbols whose names are | |
662 | qualified by the name of the surrounding class. This is | |
663 | just like members of namespaces; in particular, | |
664 | lookup_symbol_namespace works when looking them up. */ | |
665 | ||
79c2c32d | 666 | const char *parent_name = TYPE_TAG_NAME (parent_type); |
8540c487 SW |
667 | struct symbol *sym = cp_lookup_symbol_in_namespace (parent_name, |
668 | nested_name, | |
8540c487 SW |
669 | block, |
670 | VAR_DOMAIN); | |
41f62f39 | 671 | char *concatenated_name; |
c5504eaf | 672 | |
41f62f39 | 673 | if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF) |
79c2c32d | 674 | return SYMBOL_TYPE (sym); |
41f62f39 JK |
675 | |
676 | /* Now search all static file-level symbols. Not strictly correct, | |
677 | but more useful than an error. We do not try to guess any imported | |
678 | namespace as even the fully specified namespace seach is is already | |
679 | not C++ compliant and more assumptions could make it too magic. */ | |
680 | ||
681 | concatenated_name = alloca (strlen (parent_name) + 2 | |
682 | + strlen (nested_name) + 1); | |
683 | sprintf (concatenated_name, "%s::%s", parent_name, nested_name); | |
684 | sym = lookup_static_symbol_aux (concatenated_name, VAR_DOMAIN); | |
685 | if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF) | |
686 | return SYMBOL_TYPE (sym); | |
687 | ||
688 | return NULL; | |
79c2c32d DC |
689 | } |
690 | default: | |
691 | internal_error (__FILE__, __LINE__, | |
e2e0b3e5 | 692 | _("cp_lookup_nested_type called on a non-aggregate type.")); |
79c2c32d DC |
693 | } |
694 | } | |
695 | ||
b368761e DC |
696 | /* The C++-version of lookup_transparent_type. */ |
697 | ||
698 | /* FIXME: carlton/2004-01-16: The problem that this is trying to | |
699 | address is that, unfortunately, sometimes NAME is wrong: it may not | |
700 | include the name of namespaces enclosing the type in question. | |
701 | lookup_transparent_type gets called when the the type in question | |
702 | is a declaration, and we're trying to find its definition; but, for | |
703 | declarations, our type name deduction mechanism doesn't work. | |
704 | There's nothing we can do to fix this in general, I think, in the | |
705 | absence of debug information about namespaces (I've filed PR | |
706 | gdb/1511 about this); until such debug information becomes more | |
707 | prevalent, one heuristic which sometimes looks is to search for the | |
708 | definition in namespaces containing the current namespace. | |
709 | ||
710 | We should delete this functions once the appropriate debug | |
711 | information becomes more widespread. (GCC 3.4 will be the first | |
712 | released version of GCC with such information.) */ | |
713 | ||
714 | struct type * | |
715 | cp_lookup_transparent_type (const char *name) | |
716 | { | |
717 | /* First, try the honest way of looking up the definition. */ | |
718 | struct type *t = basic_lookup_transparent_type (name); | |
719 | const char *scope; | |
720 | ||
721 | if (t != NULL) | |
722 | return t; | |
723 | ||
724 | /* If that doesn't work and we're within a namespace, look there | |
725 | instead. */ | |
726 | scope = block_scope (get_selected_block (0)); | |
727 | ||
728 | if (scope[0] == '\0') | |
729 | return NULL; | |
730 | ||
731 | return cp_lookup_transparent_type_loop (name, scope, 0); | |
732 | } | |
733 | ||
734 | /* Lookup the the type definition associated to NAME in | |
735 | namespaces/classes containing SCOPE whose name is strictly longer | |
736 | than LENGTH. LENGTH must be the index of the start of a | |
737 | component of SCOPE. */ | |
738 | ||
739 | static struct type * | |
740 | cp_lookup_transparent_type_loop (const char *name, const char *scope, | |
741 | int length) | |
742 | { | |
1198ecbe | 743 | int scope_length = length + cp_find_first_component (scope + length); |
b368761e DC |
744 | char *full_name; |
745 | ||
746 | /* If the current scope is followed by "::", look in the next | |
747 | component. */ | |
748 | if (scope[scope_length] == ':') | |
749 | { | |
750 | struct type *retval | |
751 | = cp_lookup_transparent_type_loop (name, scope, scope_length + 2); | |
c5504eaf | 752 | |
b368761e DC |
753 | if (retval != NULL) |
754 | return retval; | |
755 | } | |
756 | ||
757 | full_name = alloca (scope_length + 2 + strlen (name) + 1); | |
758 | strncpy (full_name, scope, scope_length); | |
759 | strncpy (full_name + scope_length, "::", 2); | |
760 | strcpy (full_name + scope_length + 2, name); | |
761 | ||
762 | return basic_lookup_transparent_type (full_name); | |
763 | } | |
764 | ||
5c4e30ca DC |
765 | /* Now come functions for dealing with symbols associated to |
766 | namespaces. (They're used to store the namespaces themselves, not | |
767 | objects that live in the namespaces.) These symbols come in two | |
768 | varieties: if we run into a DW_TAG_namespace DIE, then we know that | |
769 | we have a namespace, so dwarf2read.c creates a symbol for it just | |
770 | like normal. But, unfortunately, versions of GCC through at least | |
771 | 3.3 don't generate those DIE's. Our solution is to try to guess | |
772 | their existence by looking at demangled names. This might cause us | |
773 | to misidentify classes as namespaces, however. So we put those | |
774 | symbols in a special block (one per objfile), and we only search | |
775 | that block as a last resort. */ | |
776 | ||
777 | /* FIXME: carlton/2003-06-12: Once versions of GCC that generate | |
778 | DW_TAG_namespace have been out for a year or two, we should get rid | |
779 | of all of this "possible namespace" nonsense. */ | |
780 | ||
781 | /* Allocate everything necessary for the possible namespace block | |
782 | associated to OBJFILE. */ | |
783 | ||
784 | static void | |
785 | initialize_namespace_symtab (struct objfile *objfile) | |
786 | { | |
787 | struct symtab *namespace_symtab; | |
788 | struct blockvector *bv; | |
789 | struct block *bl; | |
790 | ||
791 | namespace_symtab = allocate_symtab ("<<C++-namespaces>>", objfile); | |
792 | namespace_symtab->language = language_cplus; | |
793 | namespace_symtab->free_code = free_nothing; | |
794 | namespace_symtab->dirname = NULL; | |
795 | ||
4a146b47 | 796 | bv = obstack_alloc (&objfile->objfile_obstack, |
5c4e30ca DC |
797 | sizeof (struct blockvector) |
798 | + FIRST_LOCAL_BLOCK * sizeof (struct block *)); | |
799 | BLOCKVECTOR_NBLOCKS (bv) = FIRST_LOCAL_BLOCK + 1; | |
800 | BLOCKVECTOR (namespace_symtab) = bv; | |
801 | ||
802 | /* Allocate empty GLOBAL_BLOCK and STATIC_BLOCK. */ | |
803 | ||
4a146b47 EZ |
804 | bl = allocate_block (&objfile->objfile_obstack); |
805 | BLOCK_DICT (bl) = dict_create_linear (&objfile->objfile_obstack, | |
5c4e30ca DC |
806 | NULL); |
807 | BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl; | |
4a146b47 EZ |
808 | bl = allocate_block (&objfile->objfile_obstack); |
809 | BLOCK_DICT (bl) = dict_create_linear (&objfile->objfile_obstack, | |
5c4e30ca DC |
810 | NULL); |
811 | BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl; | |
812 | ||
813 | /* Allocate the possible namespace block; we put it where the first | |
814 | local block will live, though I don't think there's any need to | |
815 | pretend that it's actually a local block (e.g. by setting | |
816 | BLOCK_SUPERBLOCK appropriately). We don't use the global or | |
817 | static block because we don't want it searched during the normal | |
818 | search of all global/static blocks in lookup_symbol: we only want | |
819 | it used as a last resort. */ | |
820 | ||
821 | /* NOTE: carlton/2003-09-11: I considered not associating the fake | |
822 | symbols to a block/symtab at all. But that would cause problems | |
823 | with lookup_symbol's SYMTAB argument and with block_found, so | |
824 | having a symtab/block for this purpose seems like the best | |
825 | solution for now. */ | |
826 | ||
4a146b47 | 827 | bl = allocate_block (&objfile->objfile_obstack); |
5c4e30ca DC |
828 | BLOCK_DICT (bl) = dict_create_hashed_expandable (); |
829 | BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK) = bl; | |
830 | ||
831 | namespace_symtab->free_func = free_namespace_block; | |
832 | ||
833 | objfile->cp_namespace_symtab = namespace_symtab; | |
834 | } | |
835 | ||
836 | /* Locate the possible namespace block associated to OBJFILE, | |
837 | allocating it if necessary. */ | |
838 | ||
839 | static struct block * | |
840 | get_possible_namespace_block (struct objfile *objfile) | |
841 | { | |
842 | if (objfile->cp_namespace_symtab == NULL) | |
843 | initialize_namespace_symtab (objfile); | |
844 | ||
845 | return BLOCKVECTOR_BLOCK (BLOCKVECTOR (objfile->cp_namespace_symtab), | |
846 | FIRST_LOCAL_BLOCK); | |
847 | } | |
848 | ||
849 | /* Free the dictionary associated to the possible namespace block. */ | |
850 | ||
851 | static void | |
852 | free_namespace_block (struct symtab *symtab) | |
853 | { | |
854 | struct block *possible_namespace_block; | |
855 | ||
856 | possible_namespace_block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), | |
857 | FIRST_LOCAL_BLOCK); | |
858 | gdb_assert (possible_namespace_block != NULL); | |
859 | dict_free (BLOCK_DICT (possible_namespace_block)); | |
860 | } | |
861 | ||
862 | /* Ensure that there are symbols in the possible namespace block | |
863 | associated to OBJFILE for all initial substrings of NAME that look | |
864 | like namespaces or classes. NAME should end in a member variable: | |
865 | it shouldn't consist solely of namespaces. */ | |
866 | ||
867 | void | |
868 | cp_check_possible_namespace_symbols (const char *name, struct objfile *objfile) | |
869 | { | |
870 | check_possible_namespace_symbols_loop (name, | |
871 | cp_find_first_component (name), | |
872 | objfile); | |
873 | } | |
874 | ||
875 | /* This is a helper loop for cp_check_possible_namespace_symbols; it | |
876 | ensures that there are symbols in the possible namespace block | |
877 | associated to OBJFILE for all namespaces that are initial | |
878 | substrings of NAME of length at least LEN. It returns 1 if a | |
879 | previous loop had already created the shortest such symbol and 0 | |
880 | otherwise. | |
881 | ||
882 | This function assumes that if there is already a symbol associated | |
883 | to a substring of NAME of a given length, then there are already | |
884 | symbols associated to all substrings of NAME whose length is less | |
885 | than that length. So if cp_check_possible_namespace_symbols has | |
886 | been called once with argument "A::B::C::member", then that will | |
887 | create symbols "A", "A::B", and "A::B::C". If it is then later | |
888 | called with argument "A::B::D::member", then the new call will | |
889 | generate a new symbol for "A::B::D", but once it sees that "A::B" | |
890 | has already been created, it doesn't bother checking to see if "A" | |
891 | has also been created. */ | |
892 | ||
893 | static int | |
894 | check_possible_namespace_symbols_loop (const char *name, int len, | |
895 | struct objfile *objfile) | |
896 | { | |
897 | if (name[len] == ':') | |
898 | { | |
899 | int done; | |
900 | int next_len = len + 2; | |
901 | ||
902 | next_len += cp_find_first_component (name + next_len); | |
903 | done = check_possible_namespace_symbols_loop (name, next_len, | |
904 | objfile); | |
905 | ||
906 | if (!done) | |
907 | done = check_one_possible_namespace_symbol (name, len, objfile); | |
908 | ||
909 | return done; | |
1fcb5155 | 910 | } |
5c4e30ca DC |
911 | else |
912 | return 0; | |
913 | } | |
914 | ||
915 | /* Check to see if there's already a possible namespace symbol in | |
916 | OBJFILE whose name is the initial substring of NAME of length LEN. | |
917 | If not, create one and return 0; otherwise, return 1. */ | |
918 | ||
919 | static int | |
920 | check_one_possible_namespace_symbol (const char *name, int len, | |
921 | struct objfile *objfile) | |
922 | { | |
923 | struct block *block = get_possible_namespace_block (objfile); | |
ec5cdd75 DJ |
924 | char *name_copy = alloca (len + 1); |
925 | struct symbol *sym; | |
926 | ||
927 | memcpy (name_copy, name, len); | |
928 | name_copy[len] = '\0'; | |
94af9270 | 929 | sym = lookup_block_symbol (block, name_copy, VAR_DOMAIN); |
5c4e30ca DC |
930 | |
931 | if (sym == NULL) | |
932 | { | |
ec5cdd75 | 933 | struct type *type; |
ec5cdd75 DJ |
934 | |
935 | type = init_type (TYPE_CODE_NAMESPACE, 0, 0, name_copy, objfile); | |
936 | ||
5c4e30ca DC |
937 | TYPE_TAG_NAME (type) = TYPE_NAME (type); |
938 | ||
4a146b47 | 939 | sym = obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol)); |
5c4e30ca | 940 | memset (sym, 0, sizeof (struct symbol)); |
33e5013e | 941 | SYMBOL_SET_LANGUAGE (sym, language_cplus); |
04a679b8 TT |
942 | /* Note that init_type copied the name to the objfile's |
943 | obstack. */ | |
944 | SYMBOL_SET_NAMES (sym, TYPE_NAME (type), len, 0, objfile); | |
5c4e30ca DC |
945 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; |
946 | SYMBOL_TYPE (sym) = type; | |
947 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; | |
948 | ||
949 | dict_add_symbol (BLOCK_DICT (block), sym); | |
950 | ||
951 | return 0; | |
952 | } | |
953 | else | |
ec5cdd75 | 954 | return 1; |
5c4e30ca DC |
955 | } |
956 | ||
957 | /* Look for a symbol named NAME in all the possible namespace blocks. | |
21b556f4 | 958 | If one is found, return it. */ |
5c4e30ca DC |
959 | |
960 | static struct symbol * | |
21b556f4 | 961 | lookup_possible_namespace_symbol (const char *name) |
5c4e30ca DC |
962 | { |
963 | struct objfile *objfile; | |
964 | ||
965 | ALL_OBJFILES (objfile) | |
966 | { | |
967 | struct symbol *sym; | |
968 | ||
969 | sym = lookup_block_symbol (get_possible_namespace_block (objfile), | |
94af9270 | 970 | name, VAR_DOMAIN); |
5c4e30ca DC |
971 | |
972 | if (sym != NULL) | |
21b556f4 | 973 | return sym; |
5c4e30ca DC |
974 | } |
975 | ||
976 | return NULL; | |
977 | } | |
978 | ||
979 | /* Print out all the possible namespace symbols. */ | |
980 | ||
981 | static void | |
982 | maintenance_cplus_namespace (char *args, int from_tty) | |
983 | { | |
984 | struct objfile *objfile; | |
c5504eaf | 985 | |
a3f17187 | 986 | printf_unfiltered (_("Possible namespaces:\n")); |
5c4e30ca DC |
987 | ALL_OBJFILES (objfile) |
988 | { | |
989 | struct dict_iterator iter; | |
990 | struct symbol *sym; | |
991 | ||
992 | ALL_BLOCK_SYMBOLS (get_possible_namespace_block (objfile), iter, sym) | |
993 | { | |
994 | printf_unfiltered ("%s\n", SYMBOL_PRINT_NAME (sym)); | |
995 | } | |
996 | } | |
997 | } | |
998 | ||
2c0b251b PA |
999 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
1000 | extern initialize_file_ftype _initialize_cp_namespace; | |
1001 | ||
5c4e30ca DC |
1002 | void |
1003 | _initialize_cp_namespace (void) | |
1004 | { | |
1005 | add_cmd ("namespace", class_maintenance, maintenance_cplus_namespace, | |
1a966eab | 1006 | _("Print the list of possible C++ namespaces."), |
5c4e30ca | 1007 | &maint_cplus_cmd_list); |
1fcb5155 | 1008 | } |