Commit | Line | Data |
---|---|---|
ed3ef339 DE |
1 | /* Scheme interface to symbols. |
2 | ||
3 | Copyright (C) 2008-2014 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | /* See README file in this directory for implementation notes, coding | |
21 | conventions, et.al. */ | |
22 | ||
23 | #include "defs.h" | |
24 | #include "block.h" | |
ed3ef339 DE |
25 | #include "frame.h" |
26 | #include "symtab.h" | |
27 | #include "objfiles.h" | |
28 | #include "value.h" | |
29 | #include "guile-internal.h" | |
30 | ||
31 | /* The <gdb:symbol> smob. */ | |
32 | ||
33 | typedef struct | |
34 | { | |
35 | /* This always appears first. */ | |
36 | eqable_gdb_smob base; | |
37 | ||
38 | /* The GDB symbol structure this smob is wrapping. */ | |
39 | struct symbol *symbol; | |
40 | } symbol_smob; | |
41 | ||
42 | static const char symbol_smob_name[] = "gdb:symbol"; | |
43 | ||
44 | /* The tag Guile knows the symbol smob by. */ | |
45 | static scm_t_bits symbol_smob_tag; | |
46 | ||
47 | /* Keywords used in argument passing. */ | |
48 | static SCM block_keyword; | |
49 | static SCM domain_keyword; | |
50 | static SCM frame_keyword; | |
51 | ||
52 | static const struct objfile_data *syscm_objfile_data_key; | |
53 | \f | |
54 | /* Administrivia for symbol smobs. */ | |
55 | ||
56 | /* Helper function to hash a symbol_smob. */ | |
57 | ||
58 | static hashval_t | |
59 | syscm_hash_symbol_smob (const void *p) | |
60 | { | |
61 | const symbol_smob *s_smob = p; | |
62 | ||
63 | return htab_hash_pointer (s_smob->symbol); | |
64 | } | |
65 | ||
66 | /* Helper function to compute equality of symbol_smobs. */ | |
67 | ||
68 | static int | |
69 | syscm_eq_symbol_smob (const void *ap, const void *bp) | |
70 | { | |
71 | const symbol_smob *a = ap; | |
72 | const symbol_smob *b = bp; | |
73 | ||
74 | return (a->symbol == b->symbol | |
75 | && a->symbol != NULL); | |
76 | } | |
77 | ||
78 | /* Return the struct symbol pointer -> SCM mapping table. | |
79 | It is created if necessary. */ | |
80 | ||
81 | static htab_t | |
82 | syscm_objfile_symbol_map (struct symbol *symbol) | |
83 | { | |
84 | struct objfile *objfile = SYMBOL_SYMTAB (symbol)->objfile; | |
85 | htab_t htab = objfile_data (objfile, syscm_objfile_data_key); | |
86 | ||
87 | if (htab == NULL) | |
88 | { | |
89 | htab = gdbscm_create_eqable_gsmob_ptr_map (syscm_hash_symbol_smob, | |
90 | syscm_eq_symbol_smob); | |
91 | set_objfile_data (objfile, syscm_objfile_data_key, htab); | |
92 | } | |
93 | ||
94 | return htab; | |
95 | } | |
96 | ||
ed3ef339 DE |
97 | /* The smob "free" function for <gdb:symbol>. */ |
98 | ||
99 | static size_t | |
100 | syscm_free_symbol_smob (SCM self) | |
101 | { | |
102 | symbol_smob *s_smob = (symbol_smob *) SCM_SMOB_DATA (self); | |
103 | ||
104 | if (s_smob->symbol != NULL) | |
105 | { | |
106 | htab_t htab = syscm_objfile_symbol_map (s_smob->symbol); | |
107 | ||
108 | gdbscm_clear_eqable_gsmob_ptr_slot (htab, &s_smob->base); | |
109 | } | |
110 | ||
111 | /* Not necessary, done to catch bugs. */ | |
112 | s_smob->symbol = NULL; | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
117 | /* The smob "print" function for <gdb:symbol>. */ | |
118 | ||
119 | static int | |
120 | syscm_print_symbol_smob (SCM self, SCM port, scm_print_state *pstate) | |
121 | { | |
122 | symbol_smob *s_smob = (symbol_smob *) SCM_SMOB_DATA (self); | |
123 | ||
124 | if (pstate->writingp) | |
125 | gdbscm_printf (port, "#<%s ", symbol_smob_name); | |
126 | gdbscm_printf (port, "%s", | |
127 | s_smob->symbol != NULL | |
128 | ? SYMBOL_PRINT_NAME (s_smob->symbol) | |
129 | : "<invalid>"); | |
130 | if (pstate->writingp) | |
131 | scm_puts (">", port); | |
132 | ||
133 | scm_remember_upto_here_1 (self); | |
134 | ||
135 | /* Non-zero means success. */ | |
136 | return 1; | |
137 | } | |
138 | ||
139 | /* Low level routine to create a <gdb:symbol> object. */ | |
140 | ||
141 | static SCM | |
142 | syscm_make_symbol_smob (void) | |
143 | { | |
144 | symbol_smob *s_smob = (symbol_smob *) | |
145 | scm_gc_malloc (sizeof (symbol_smob), symbol_smob_name); | |
146 | SCM s_scm; | |
147 | ||
148 | s_smob->symbol = NULL; | |
149 | s_scm = scm_new_smob (symbol_smob_tag, (scm_t_bits) s_smob); | |
1254eefc | 150 | gdbscm_init_eqable_gsmob (&s_smob->base, s_scm); |
ed3ef339 DE |
151 | |
152 | return s_scm; | |
153 | } | |
154 | ||
155 | /* Return non-zero if SCM is a symbol smob. */ | |
156 | ||
157 | int | |
158 | syscm_is_symbol (SCM scm) | |
159 | { | |
160 | return SCM_SMOB_PREDICATE (symbol_smob_tag, scm); | |
161 | } | |
162 | ||
163 | /* (symbol? object) -> boolean */ | |
164 | ||
165 | static SCM | |
166 | gdbscm_symbol_p (SCM scm) | |
167 | { | |
168 | return scm_from_bool (syscm_is_symbol (scm)); | |
169 | } | |
170 | ||
171 | /* Return the existing object that encapsulates SYMBOL, or create a new | |
172 | <gdb:symbol> object. */ | |
173 | ||
174 | SCM | |
175 | syscm_scm_from_symbol (struct symbol *symbol) | |
176 | { | |
177 | htab_t htab; | |
178 | eqable_gdb_smob **slot; | |
179 | symbol_smob *s_smob, s_smob_for_lookup; | |
180 | SCM s_scm; | |
181 | ||
182 | /* If we've already created a gsmob for this symbol, return it. | |
183 | This makes symbols eq?-able. */ | |
184 | htab = syscm_objfile_symbol_map (symbol); | |
185 | s_smob_for_lookup.symbol = symbol; | |
186 | slot = gdbscm_find_eqable_gsmob_ptr_slot (htab, &s_smob_for_lookup.base); | |
187 | if (*slot != NULL) | |
188 | return (*slot)->containing_scm; | |
189 | ||
190 | s_scm = syscm_make_symbol_smob (); | |
191 | s_smob = (symbol_smob *) SCM_SMOB_DATA (s_scm); | |
192 | s_smob->symbol = symbol; | |
1254eefc | 193 | gdbscm_fill_eqable_gsmob_ptr_slot (slot, &s_smob->base); |
ed3ef339 DE |
194 | |
195 | return s_scm; | |
196 | } | |
197 | ||
198 | /* Returns the <gdb:symbol> object in SELF. | |
199 | Throws an exception if SELF is not a <gdb:symbol> object. */ | |
200 | ||
201 | static SCM | |
202 | syscm_get_symbol_arg_unsafe (SCM self, int arg_pos, const char *func_name) | |
203 | { | |
204 | SCM_ASSERT_TYPE (syscm_is_symbol (self), self, arg_pos, func_name, | |
205 | symbol_smob_name); | |
206 | ||
207 | return self; | |
208 | } | |
209 | ||
210 | /* Returns a pointer to the symbol smob of SELF. | |
211 | Throws an exception if SELF is not a <gdb:symbol> object. */ | |
212 | ||
213 | static symbol_smob * | |
214 | syscm_get_symbol_smob_arg_unsafe (SCM self, int arg_pos, const char *func_name) | |
215 | { | |
216 | SCM s_scm = syscm_get_symbol_arg_unsafe (self, arg_pos, func_name); | |
217 | symbol_smob *s_smob = (symbol_smob *) SCM_SMOB_DATA (s_scm); | |
218 | ||
219 | return s_smob; | |
220 | } | |
221 | ||
222 | /* Return non-zero if symbol S_SMOB is valid. */ | |
223 | ||
224 | static int | |
225 | syscm_is_valid (symbol_smob *s_smob) | |
226 | { | |
227 | return s_smob->symbol != NULL; | |
228 | } | |
229 | ||
230 | /* Throw a Scheme error if SELF is not a valid symbol smob. | |
231 | Otherwise return a pointer to the symbol smob. */ | |
232 | ||
233 | static symbol_smob * | |
234 | syscm_get_valid_symbol_smob_arg_unsafe (SCM self, int arg_pos, | |
235 | const char *func_name) | |
236 | { | |
237 | symbol_smob *s_smob | |
238 | = syscm_get_symbol_smob_arg_unsafe (self, arg_pos, func_name); | |
239 | ||
240 | if (!syscm_is_valid (s_smob)) | |
241 | { | |
242 | gdbscm_invalid_object_error (func_name, arg_pos, self, | |
243 | _("<gdb:symbol>")); | |
244 | } | |
245 | ||
246 | return s_smob; | |
247 | } | |
248 | ||
249 | /* Throw a Scheme error if SELF is not a valid symbol smob. | |
250 | Otherwise return a pointer to the symbol struct. */ | |
251 | ||
252 | struct symbol * | |
253 | syscm_get_valid_symbol_arg_unsafe (SCM self, int arg_pos, | |
254 | const char *func_name) | |
255 | { | |
256 | symbol_smob *s_smob = syscm_get_valid_symbol_smob_arg_unsafe (self, arg_pos, | |
257 | func_name); | |
258 | ||
259 | return s_smob->symbol; | |
260 | } | |
261 | ||
262 | /* Helper function for syscm_del_objfile_symbols to mark the symbol | |
263 | as invalid. */ | |
264 | ||
265 | static int | |
266 | syscm_mark_symbol_invalid (void **slot, void *info) | |
267 | { | |
268 | symbol_smob *s_smob = (symbol_smob *) *slot; | |
269 | ||
270 | s_smob->symbol = NULL; | |
271 | return 1; | |
272 | } | |
273 | ||
274 | /* This function is called when an objfile is about to be freed. | |
275 | Invalidate the symbol as further actions on the symbol would result | |
276 | in bad data. All access to s_smob->symbol should be gated by | |
277 | syscm_get_valid_symbol_smob_arg_unsafe which will raise an exception on | |
278 | invalid symbols. */ | |
279 | ||
280 | static void | |
281 | syscm_del_objfile_symbols (struct objfile *objfile, void *datum) | |
282 | { | |
283 | htab_t htab = datum; | |
284 | ||
285 | if (htab != NULL) | |
286 | { | |
287 | htab_traverse_noresize (htab, syscm_mark_symbol_invalid, NULL); | |
288 | htab_delete (htab); | |
289 | } | |
290 | } | |
291 | \f | |
292 | /* Symbol methods. */ | |
293 | ||
294 | /* (symbol-valid? <gdb:symbol>) -> boolean | |
295 | Returns #t if SELF still exists in GDB. */ | |
296 | ||
297 | static SCM | |
298 | gdbscm_symbol_valid_p (SCM self) | |
299 | { | |
300 | symbol_smob *s_smob | |
301 | = syscm_get_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
302 | ||
303 | return scm_from_bool (syscm_is_valid (s_smob)); | |
304 | } | |
305 | ||
306 | /* (symbol-type <gdb:symbol>) -> <gdb:type> | |
307 | Return the type of SELF, or #f if SELF has no type. */ | |
308 | ||
309 | static SCM | |
310 | gdbscm_symbol_type (SCM self) | |
311 | { | |
312 | symbol_smob *s_smob | |
313 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
314 | const struct symbol *symbol = s_smob->symbol; | |
315 | ||
316 | if (SYMBOL_TYPE (symbol) == NULL) | |
317 | return SCM_BOOL_F; | |
318 | ||
319 | return tyscm_scm_from_type (SYMBOL_TYPE (symbol)); | |
320 | } | |
321 | ||
322 | /* (symbol-symtab <gdb:symbol>) -> <gdb:symtab> | |
323 | Return the symbol table of SELF. */ | |
324 | ||
325 | static SCM | |
326 | gdbscm_symbol_symtab (SCM self) | |
327 | { | |
328 | symbol_smob *s_smob | |
329 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
330 | const struct symbol *symbol = s_smob->symbol; | |
331 | ||
332 | return stscm_scm_from_symtab (SYMBOL_SYMTAB (symbol)); | |
333 | } | |
334 | ||
335 | /* (symbol-name <gdb:symbol>) -> string */ | |
336 | ||
337 | static SCM | |
338 | gdbscm_symbol_name (SCM self) | |
339 | { | |
340 | symbol_smob *s_smob | |
341 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
342 | const struct symbol *symbol = s_smob->symbol; | |
343 | ||
344 | return gdbscm_scm_from_c_string (SYMBOL_NATURAL_NAME (symbol)); | |
345 | } | |
346 | ||
347 | /* (symbol-linkage-name <gdb:symbol>) -> string */ | |
348 | ||
349 | static SCM | |
350 | gdbscm_symbol_linkage_name (SCM self) | |
351 | { | |
352 | symbol_smob *s_smob | |
353 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
354 | const struct symbol *symbol = s_smob->symbol; | |
355 | ||
356 | return gdbscm_scm_from_c_string (SYMBOL_LINKAGE_NAME (symbol)); | |
357 | } | |
358 | ||
359 | /* (symbol-print-name <gdb:symbol>) -> string */ | |
360 | ||
361 | static SCM | |
362 | gdbscm_symbol_print_name (SCM self) | |
363 | { | |
364 | symbol_smob *s_smob | |
365 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
366 | const struct symbol *symbol = s_smob->symbol; | |
367 | ||
368 | return gdbscm_scm_from_c_string (SYMBOL_PRINT_NAME (symbol)); | |
369 | } | |
370 | ||
371 | /* (symbol-addr-class <gdb:symbol>) -> integer */ | |
372 | ||
373 | static SCM | |
374 | gdbscm_symbol_addr_class (SCM self) | |
375 | { | |
376 | symbol_smob *s_smob | |
377 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
378 | const struct symbol *symbol = s_smob->symbol; | |
379 | ||
380 | return scm_from_int (SYMBOL_CLASS (symbol)); | |
381 | } | |
382 | ||
383 | /* (symbol-argument? <gdb:symbol>) -> boolean */ | |
384 | ||
385 | static SCM | |
386 | gdbscm_symbol_argument_p (SCM self) | |
387 | { | |
388 | symbol_smob *s_smob | |
389 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
390 | const struct symbol *symbol = s_smob->symbol; | |
391 | ||
392 | return scm_from_bool (SYMBOL_IS_ARGUMENT (symbol)); | |
393 | } | |
394 | ||
395 | /* (symbol-constant? <gdb:symbol>) -> boolean */ | |
396 | ||
397 | static SCM | |
398 | gdbscm_symbol_constant_p (SCM self) | |
399 | { | |
400 | symbol_smob *s_smob | |
401 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
402 | const struct symbol *symbol = s_smob->symbol; | |
403 | enum address_class class; | |
404 | ||
405 | class = SYMBOL_CLASS (symbol); | |
406 | ||
407 | return scm_from_bool (class == LOC_CONST || class == LOC_CONST_BYTES); | |
408 | } | |
409 | ||
410 | /* (symbol-function? <gdb:symbol>) -> boolean */ | |
411 | ||
412 | static SCM | |
413 | gdbscm_symbol_function_p (SCM self) | |
414 | { | |
415 | symbol_smob *s_smob | |
416 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
417 | const struct symbol *symbol = s_smob->symbol; | |
418 | enum address_class class; | |
419 | ||
420 | class = SYMBOL_CLASS (symbol); | |
421 | ||
422 | return scm_from_bool (class == LOC_BLOCK); | |
423 | } | |
424 | ||
425 | /* (symbol-variable? <gdb:symbol>) -> boolean */ | |
426 | ||
427 | static SCM | |
428 | gdbscm_symbol_variable_p (SCM self) | |
429 | { | |
430 | symbol_smob *s_smob | |
431 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
432 | const struct symbol *symbol = s_smob->symbol; | |
433 | enum address_class class; | |
434 | ||
435 | class = SYMBOL_CLASS (symbol); | |
436 | ||
437 | return scm_from_bool (!SYMBOL_IS_ARGUMENT (symbol) | |
438 | && (class == LOC_LOCAL || class == LOC_REGISTER | |
439 | || class == LOC_STATIC || class == LOC_COMPUTED | |
440 | || class == LOC_OPTIMIZED_OUT)); | |
441 | } | |
442 | ||
443 | /* (symbol-needs-frame? <gdb:symbol>) -> boolean | |
444 | Return #t if the symbol needs a frame for evaluation. */ | |
445 | ||
446 | static SCM | |
447 | gdbscm_symbol_needs_frame_p (SCM self) | |
448 | { | |
449 | symbol_smob *s_smob | |
450 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
451 | struct symbol *symbol = s_smob->symbol; | |
452 | volatile struct gdb_exception except; | |
453 | int result = 0; | |
454 | ||
455 | TRY_CATCH (except, RETURN_MASK_ALL) | |
456 | { | |
457 | result = symbol_read_needs_frame (symbol); | |
458 | } | |
459 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
460 | ||
461 | return scm_from_bool (result); | |
462 | } | |
463 | ||
464 | /* (symbol-line <gdb:symbol>) -> integer | |
465 | Return the line number at which the symbol was defined. */ | |
466 | ||
467 | static SCM | |
468 | gdbscm_symbol_line (SCM self) | |
469 | { | |
470 | symbol_smob *s_smob | |
471 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
472 | const struct symbol *symbol = s_smob->symbol; | |
473 | ||
474 | return scm_from_int (SYMBOL_LINE (symbol)); | |
475 | } | |
476 | ||
477 | /* (symbol-value <gdb:symbol> [#:frame <gdb:frame>]) -> <gdb:value> | |
478 | Return the value of the symbol, or an error in various circumstances. */ | |
479 | ||
480 | static SCM | |
481 | gdbscm_symbol_value (SCM self, SCM rest) | |
482 | { | |
483 | symbol_smob *s_smob | |
484 | = syscm_get_valid_symbol_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
485 | struct symbol *symbol = s_smob->symbol; | |
486 | SCM keywords[] = { frame_keyword, SCM_BOOL_F }; | |
487 | int frame_pos = -1; | |
488 | SCM frame_scm = SCM_BOOL_F; | |
489 | frame_smob *f_smob = NULL; | |
490 | struct frame_info *frame_info = NULL; | |
491 | struct value *value = NULL; | |
492 | volatile struct gdb_exception except; | |
493 | ||
494 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG2, keywords, "#O", | |
495 | rest, &frame_pos, &frame_scm); | |
496 | if (!gdbscm_is_false (frame_scm)) | |
497 | f_smob = frscm_get_frame_smob_arg_unsafe (frame_scm, frame_pos, FUNC_NAME); | |
498 | ||
499 | if (SYMBOL_CLASS (symbol) == LOC_TYPEDEF) | |
500 | { | |
501 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, | |
502 | _("cannot get the value of a typedef")); | |
503 | } | |
504 | ||
505 | TRY_CATCH (except, RETURN_MASK_ALL) | |
506 | { | |
507 | if (f_smob != NULL) | |
508 | { | |
509 | frame_info = frscm_frame_smob_to_frame (f_smob); | |
510 | if (frame_info == NULL) | |
511 | error (_("Invalid frame")); | |
512 | } | |
513 | ||
514 | if (symbol_read_needs_frame (symbol) && frame_info == NULL) | |
515 | error (_("Symbol requires a frame to compute its value")); | |
516 | ||
517 | value = read_var_value (symbol, frame_info); | |
518 | } | |
519 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
520 | ||
521 | return vlscm_scm_from_value (value); | |
522 | } | |
523 | \f | |
524 | /* (lookup-symbol name [#:block <gdb:block>] [#:domain domain]) | |
525 | -> (<gdb:symbol> field-of-this?) | |
526 | The result is #f if the symbol is not found. | |
527 | See comment in lookup_symbol_in_language for field-of-this?. */ | |
528 | ||
529 | static SCM | |
530 | gdbscm_lookup_symbol (SCM name_scm, SCM rest) | |
531 | { | |
532 | char *name; | |
533 | SCM keywords[] = { block_keyword, domain_keyword, SCM_BOOL_F }; | |
534 | const struct block *block = NULL; | |
535 | SCM block_scm = SCM_BOOL_F; | |
536 | int domain = VAR_DOMAIN; | |
537 | int block_arg_pos = -1, domain_arg_pos = -1; | |
538 | struct field_of_this_result is_a_field_of_this; | |
539 | struct symbol *symbol = NULL; | |
540 | volatile struct gdb_exception except; | |
541 | struct cleanup *cleanups; | |
542 | ||
543 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#Oi", | |
544 | name_scm, &name, rest, | |
545 | &block_arg_pos, &block_scm, | |
546 | &domain_arg_pos, &domain); | |
547 | ||
548 | cleanups = make_cleanup (xfree, name); | |
549 | ||
550 | if (block_arg_pos >= 0) | |
551 | { | |
552 | SCM except_scm; | |
553 | ||
554 | block = bkscm_scm_to_block (block_scm, block_arg_pos, FUNC_NAME, | |
555 | &except_scm); | |
556 | if (block == NULL) | |
557 | { | |
558 | do_cleanups (cleanups); | |
559 | gdbscm_throw (except_scm); | |
560 | } | |
561 | } | |
562 | else | |
563 | { | |
564 | struct frame_info *selected_frame; | |
565 | ||
566 | TRY_CATCH (except, RETURN_MASK_ALL) | |
567 | { | |
568 | selected_frame = get_selected_frame (_("no frame selected")); | |
569 | block = get_frame_block (selected_frame, NULL); | |
570 | } | |
571 | GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups); | |
572 | } | |
573 | ||
574 | TRY_CATCH (except, RETURN_MASK_ALL) | |
575 | { | |
576 | symbol = lookup_symbol (name, block, domain, &is_a_field_of_this); | |
577 | } | |
578 | do_cleanups (cleanups); | |
579 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
580 | ||
581 | if (symbol == NULL) | |
582 | return SCM_BOOL_F; | |
583 | ||
584 | return scm_list_2 (syscm_scm_from_symbol (symbol), | |
585 | scm_from_bool (is_a_field_of_this.type != NULL)); | |
586 | } | |
587 | ||
588 | /* (lookup-global-symbol name [#:domain domain]) -> <gdb:symbol> | |
589 | The result is #f if the symbol is not found. */ | |
590 | ||
591 | static SCM | |
592 | gdbscm_lookup_global_symbol (SCM name_scm, SCM rest) | |
593 | { | |
594 | char *name; | |
595 | SCM keywords[] = { domain_keyword, SCM_BOOL_F }; | |
596 | int domain_arg_pos = -1; | |
597 | int domain = VAR_DOMAIN; | |
598 | struct symbol *symbol = NULL; | |
599 | volatile struct gdb_exception except; | |
600 | struct cleanup *cleanups; | |
601 | ||
602 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#i", | |
603 | name_scm, &name, rest, | |
604 | &domain_arg_pos, &domain); | |
605 | ||
606 | cleanups = make_cleanup (xfree, name); | |
607 | ||
608 | TRY_CATCH (except, RETURN_MASK_ALL) | |
609 | { | |
08724ab7 | 610 | symbol = lookup_global_symbol (name, NULL, domain); |
ed3ef339 DE |
611 | } |
612 | do_cleanups (cleanups); | |
613 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
614 | ||
615 | if (symbol == NULL) | |
616 | return SCM_BOOL_F; | |
617 | ||
618 | return syscm_scm_from_symbol (symbol); | |
619 | } | |
620 | \f | |
621 | /* Initialize the Scheme symbol support. */ | |
622 | ||
623 | /* Note: The SYMBOL_ prefix on the integer constants here is present for | |
624 | compatibility with the Python support. */ | |
625 | ||
626 | static const scheme_integer_constant symbol_integer_constants[] = | |
627 | { | |
628 | #define X(SYM) { "SYMBOL_" #SYM, SYM } | |
629 | X (LOC_UNDEF), | |
630 | X (LOC_CONST), | |
631 | X (LOC_STATIC), | |
632 | X (LOC_REGISTER), | |
633 | X (LOC_ARG), | |
634 | X (LOC_REF_ARG), | |
635 | X (LOC_LOCAL), | |
636 | X (LOC_TYPEDEF), | |
637 | X (LOC_LABEL), | |
638 | X (LOC_BLOCK), | |
639 | X (LOC_CONST_BYTES), | |
640 | X (LOC_UNRESOLVED), | |
641 | X (LOC_OPTIMIZED_OUT), | |
642 | X (LOC_COMPUTED), | |
643 | X (LOC_REGPARM_ADDR), | |
644 | ||
645 | X (UNDEF_DOMAIN), | |
646 | X (VAR_DOMAIN), | |
647 | X (STRUCT_DOMAIN), | |
648 | X (LABEL_DOMAIN), | |
649 | X (VARIABLES_DOMAIN), | |
650 | X (FUNCTIONS_DOMAIN), | |
651 | X (TYPES_DOMAIN), | |
652 | #undef X | |
653 | ||
654 | END_INTEGER_CONSTANTS | |
655 | }; | |
656 | ||
657 | static const scheme_function symbol_functions[] = | |
658 | { | |
659 | { "symbol?", 1, 0, 0, gdbscm_symbol_p, | |
660 | "\ | |
661 | Return #t if the object is a <gdb:symbol> object." }, | |
662 | ||
663 | { "symbol-valid?", 1, 0, 0, gdbscm_symbol_valid_p, | |
664 | "\ | |
665 | Return #t if object is a valid <gdb:symbol> object.\n\ | |
666 | A valid symbol is a symbol that has not been freed.\n\ | |
667 | Symbols are freed when the objfile they come from is freed." }, | |
668 | ||
669 | { "symbol-type", 1, 0, 0, gdbscm_symbol_type, | |
670 | "\ | |
671 | Return the type of symbol." }, | |
672 | ||
673 | { "symbol-symtab", 1, 0, 0, gdbscm_symbol_symtab, | |
674 | "\ | |
675 | Return the symbol table (<gdb:symtab>) containing symbol." }, | |
676 | ||
677 | { "symbol-line", 1, 0, 0, gdbscm_symbol_line, | |
678 | "\ | |
679 | Return the line number at which the symbol was defined." }, | |
680 | ||
681 | { "symbol-name", 1, 0, 0, gdbscm_symbol_name, | |
682 | "\ | |
683 | Return the name of the symbol as a string." }, | |
684 | ||
685 | { "symbol-linkage-name", 1, 0, 0, gdbscm_symbol_linkage_name, | |
686 | "\ | |
687 | Return the linkage name of the symbol as a string." }, | |
688 | ||
689 | { "symbol-print-name", 1, 0, 0, gdbscm_symbol_print_name, | |
690 | "\ | |
691 | Return the print name of the symbol as a string.\n\ | |
692 | This is either name or linkage-name, depending on whether the user\n\ | |
693 | asked GDB to display demangled or mangled names." }, | |
694 | ||
695 | { "symbol-addr-class", 1, 0, 0, gdbscm_symbol_addr_class, | |
696 | "\ | |
697 | Return the address class of the symbol." }, | |
698 | ||
699 | { "symbol-needs-frame?", 1, 0, 0, gdbscm_symbol_needs_frame_p, | |
700 | "\ | |
701 | Return #t if the symbol needs a frame to compute its value." }, | |
702 | ||
703 | { "symbol-argument?", 1, 0, 0, gdbscm_symbol_argument_p, | |
704 | "\ | |
705 | Return #t if the symbol is a function argument." }, | |
706 | ||
707 | { "symbol-constant?", 1, 0, 0, gdbscm_symbol_constant_p, | |
708 | "\ | |
709 | Return #t if the symbol is a constant." }, | |
710 | ||
711 | { "symbol-function?", 1, 0, 0, gdbscm_symbol_function_p, | |
712 | "\ | |
713 | Return #t if the symbol is a function." }, | |
714 | ||
715 | { "symbol-variable?", 1, 0, 0, gdbscm_symbol_variable_p, | |
716 | "\ | |
717 | Return #t if the symbol is a variable." }, | |
718 | ||
719 | { "symbol-value", 1, 0, 1, gdbscm_symbol_value, | |
720 | "\ | |
721 | Return the value of the symbol.\n\ | |
722 | \n\ | |
723 | Arguments: <gdb:symbol> [#:frame frame]" }, | |
724 | ||
725 | { "lookup-symbol", 1, 0, 1, gdbscm_lookup_symbol, | |
726 | "\ | |
727 | Return (<gdb:symbol> field-of-this?) if found, otherwise #f.\n\ | |
728 | \n\ | |
729 | Arguments: name [#:block block] [#:domain domain]\n\ | |
730 | name: a string containing the name of the symbol to lookup\n\ | |
731 | block: a <gdb:block> object\n\ | |
732 | domain: a SYMBOL_*_DOMAIN value" }, | |
733 | ||
734 | { "lookup-global-symbol", 1, 0, 1, gdbscm_lookup_global_symbol, | |
735 | "\ | |
736 | Return <gdb:symbol> if found, otherwise #f.\n\ | |
737 | \n\ | |
738 | Arguments: name [#:domain domain]\n\ | |
739 | name: a string containing the name of the symbol to lookup\n\ | |
740 | domain: a SYMBOL_*_DOMAIN value" }, | |
741 | ||
742 | END_FUNCTIONS | |
743 | }; | |
744 | ||
745 | void | |
746 | gdbscm_initialize_symbols (void) | |
747 | { | |
748 | symbol_smob_tag | |
749 | = gdbscm_make_smob_type (symbol_smob_name, sizeof (symbol_smob)); | |
ed3ef339 DE |
750 | scm_set_smob_free (symbol_smob_tag, syscm_free_symbol_smob); |
751 | scm_set_smob_print (symbol_smob_tag, syscm_print_symbol_smob); | |
752 | ||
753 | gdbscm_define_integer_constants (symbol_integer_constants, 1); | |
754 | gdbscm_define_functions (symbol_functions, 1); | |
755 | ||
756 | block_keyword = scm_from_latin1_keyword ("block"); | |
757 | domain_keyword = scm_from_latin1_keyword ("domain"); | |
758 | frame_keyword = scm_from_latin1_keyword ("frame"); | |
759 | ||
760 | /* Register an objfile "free" callback so we can properly | |
761 | invalidate symbols when an object file is about to be deleted. */ | |
762 | syscm_objfile_data_key | |
763 | = register_objfile_data_with_cleanup (NULL, syscm_del_objfile_symbols); | |
764 | } |