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ed3ef339 DE |
1 | /* Scheme interface to values. |
2 | ||
32d0add0 | 3 | Copyright (C) 2008-2015 Free Software Foundation, Inc. |
ed3ef339 DE |
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 "arch-utils.h" | |
25 | #include "charset.h" | |
26 | #include "cp-abi.h" | |
ed3ef339 DE |
27 | #include "infcall.h" |
28 | #include "symtab.h" /* Needed by language.h. */ | |
29 | #include "language.h" | |
30 | #include "valprint.h" | |
31 | #include "value.h" | |
32 | #include "guile-internal.h" | |
33 | ||
34 | /* The <gdb:value> smob. */ | |
35 | ||
36 | typedef struct _value_smob | |
37 | { | |
38 | /* This always appears first. */ | |
39 | gdb_smob base; | |
40 | ||
41 | /* Doubly linked list of values in values_in_scheme. | |
42 | IWBN to use a chained_gdb_smob instead, which is doable, it just requires | |
43 | a bit more casting than normal. */ | |
44 | struct _value_smob *next; | |
45 | struct _value_smob *prev; | |
46 | ||
47 | struct value *value; | |
48 | ||
49 | /* These are cached here to avoid making multiple copies of them. | |
50 | Plus computing the dynamic_type can be a bit expensive. | |
51 | We use #f to indicate that the value doesn't exist (e.g. value doesn't | |
52 | have an address), so we need another value to indicate that we haven't | |
53 | computed the value yet. For this we use SCM_UNDEFINED. */ | |
54 | SCM address; | |
55 | SCM type; | |
56 | SCM dynamic_type; | |
57 | } value_smob; | |
58 | ||
59 | static const char value_smob_name[] = "gdb:value"; | |
60 | ||
61 | /* The tag Guile knows the value smob by. */ | |
62 | static scm_t_bits value_smob_tag; | |
63 | ||
64 | /* List of all values which are currently exposed to Scheme. It is | |
65 | maintained so that when an objfile is discarded, preserve_values | |
66 | can copy the values' types if needed. */ | |
67 | static value_smob *values_in_scheme; | |
68 | ||
69 | /* Keywords used by Scheme procedures in this file. */ | |
70 | static SCM type_keyword; | |
71 | static SCM encoding_keyword; | |
72 | static SCM errors_keyword; | |
73 | static SCM length_keyword; | |
74 | ||
75 | /* Possible #:errors values. */ | |
76 | static SCM error_symbol; | |
77 | static SCM escape_symbol; | |
78 | static SCM substitute_symbol; | |
79 | \f | |
80 | /* Administrivia for value smobs. */ | |
81 | ||
82 | /* Iterate over all the <gdb:value> objects, calling preserve_one_value on | |
83 | each. | |
84 | This is the extension_language_ops.preserve_values "method". */ | |
85 | ||
86 | void | |
87 | gdbscm_preserve_values (const struct extension_language_defn *extlang, | |
88 | struct objfile *objfile, htab_t copied_types) | |
89 | { | |
90 | value_smob *iter; | |
91 | ||
92 | for (iter = values_in_scheme; iter; iter = iter->next) | |
93 | preserve_one_value (iter->value, objfile, copied_types); | |
94 | } | |
95 | ||
96 | /* Helper to add a value_smob to the global list. */ | |
97 | ||
98 | static void | |
99 | vlscm_remember_scheme_value (value_smob *v_smob) | |
100 | { | |
101 | v_smob->next = values_in_scheme; | |
102 | if (v_smob->next) | |
103 | v_smob->next->prev = v_smob; | |
104 | v_smob->prev = NULL; | |
105 | values_in_scheme = v_smob; | |
106 | } | |
107 | ||
108 | /* Helper to remove a value_smob from the global list. */ | |
109 | ||
110 | static void | |
111 | vlscm_forget_value_smob (value_smob *v_smob) | |
112 | { | |
113 | /* Remove SELF from the global list. */ | |
114 | if (v_smob->prev) | |
115 | v_smob->prev->next = v_smob->next; | |
116 | else | |
117 | { | |
118 | gdb_assert (values_in_scheme == v_smob); | |
119 | values_in_scheme = v_smob->next; | |
120 | } | |
121 | if (v_smob->next) | |
122 | v_smob->next->prev = v_smob->prev; | |
123 | } | |
124 | ||
ed3ef339 DE |
125 | /* The smob "free" function for <gdb:value>. */ |
126 | ||
127 | static size_t | |
128 | vlscm_free_value_smob (SCM self) | |
129 | { | |
130 | value_smob *v_smob = (value_smob *) SCM_SMOB_DATA (self); | |
131 | ||
132 | vlscm_forget_value_smob (v_smob); | |
133 | value_free (v_smob->value); | |
134 | ||
135 | return 0; | |
136 | } | |
137 | ||
138 | /* The smob "print" function for <gdb:value>. */ | |
139 | ||
140 | static int | |
141 | vlscm_print_value_smob (SCM self, SCM port, scm_print_state *pstate) | |
142 | { | |
143 | value_smob *v_smob = (value_smob *) SCM_SMOB_DATA (self); | |
144 | char *s = NULL; | |
145 | struct value_print_options opts; | |
ed3ef339 DE |
146 | |
147 | if (pstate->writingp) | |
148 | gdbscm_printf (port, "#<%s ", value_smob_name); | |
149 | ||
150 | get_user_print_options (&opts); | |
151 | opts.deref_ref = 0; | |
152 | ||
153 | /* pstate->writingp = zero if invoked by display/~A, and nonzero if | |
154 | invoked by write/~S. What to do here may need to evolve. | |
155 | IWBN if we could pass an argument to format that would we could use | |
156 | instead of writingp. */ | |
157 | opts.raw = !!pstate->writingp; | |
158 | ||
492d29ea | 159 | TRY |
ed3ef339 DE |
160 | { |
161 | struct ui_file *stb = mem_fileopen (); | |
162 | struct cleanup *old_chain = make_cleanup_ui_file_delete (stb); | |
163 | ||
164 | common_val_print (v_smob->value, stb, 0, &opts, current_language); | |
165 | s = ui_file_xstrdup (stb, NULL); | |
166 | ||
167 | do_cleanups (old_chain); | |
168 | } | |
492d29ea PA |
169 | CATCH (except, RETURN_MASK_ALL) |
170 | { | |
171 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
172 | } | |
173 | END_CATCH | |
ed3ef339 DE |
174 | |
175 | if (s != NULL) | |
176 | { | |
177 | scm_puts (s, port); | |
178 | xfree (s); | |
179 | } | |
180 | ||
181 | if (pstate->writingp) | |
182 | scm_puts (">", port); | |
183 | ||
184 | scm_remember_upto_here_1 (self); | |
185 | ||
186 | /* Non-zero means success. */ | |
187 | return 1; | |
188 | } | |
189 | ||
190 | /* The smob "equalp" function for <gdb:value>. */ | |
191 | ||
192 | static SCM | |
193 | vlscm_equal_p_value_smob (SCM v1, SCM v2) | |
194 | { | |
195 | const value_smob *v1_smob = (value_smob *) SCM_SMOB_DATA (v1); | |
196 | const value_smob *v2_smob = (value_smob *) SCM_SMOB_DATA (v2); | |
197 | int result = 0; | |
ed3ef339 | 198 | |
492d29ea | 199 | TRY |
ed3ef339 DE |
200 | { |
201 | result = value_equal (v1_smob->value, v2_smob->value); | |
202 | } | |
492d29ea PA |
203 | CATCH (except, RETURN_MASK_ALL) |
204 | { | |
205 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
206 | } | |
207 | END_CATCH | |
ed3ef339 DE |
208 | |
209 | return scm_from_bool (result); | |
210 | } | |
211 | ||
212 | /* Low level routine to create a <gdb:value> object. */ | |
213 | ||
214 | static SCM | |
215 | vlscm_make_value_smob (void) | |
216 | { | |
217 | value_smob *v_smob = (value_smob *) | |
218 | scm_gc_malloc (sizeof (value_smob), value_smob_name); | |
219 | SCM v_scm; | |
220 | ||
221 | /* These must be filled in by the caller. */ | |
222 | v_smob->value = NULL; | |
223 | v_smob->prev = NULL; | |
224 | v_smob->next = NULL; | |
225 | ||
226 | /* These are lazily computed. */ | |
227 | v_smob->address = SCM_UNDEFINED; | |
228 | v_smob->type = SCM_UNDEFINED; | |
229 | v_smob->dynamic_type = SCM_UNDEFINED; | |
230 | ||
231 | v_scm = scm_new_smob (value_smob_tag, (scm_t_bits) v_smob); | |
232 | gdbscm_init_gsmob (&v_smob->base); | |
233 | ||
234 | return v_scm; | |
235 | } | |
236 | ||
237 | /* Return non-zero if SCM is a <gdb:value> object. */ | |
238 | ||
239 | int | |
240 | vlscm_is_value (SCM scm) | |
241 | { | |
242 | return SCM_SMOB_PREDICATE (value_smob_tag, scm); | |
243 | } | |
244 | ||
245 | /* (value? object) -> boolean */ | |
246 | ||
247 | static SCM | |
248 | gdbscm_value_p (SCM scm) | |
249 | { | |
250 | return scm_from_bool (vlscm_is_value (scm)); | |
251 | } | |
252 | ||
253 | /* Create a new <gdb:value> object that encapsulates VALUE. | |
254 | The value is released from the all_values chain so its lifetime is not | |
255 | bound to the execution of a command. */ | |
256 | ||
257 | SCM | |
258 | vlscm_scm_from_value (struct value *value) | |
259 | { | |
260 | /* N.B. It's important to not cause any side-effects until we know the | |
261 | conversion worked. */ | |
262 | SCM v_scm = vlscm_make_value_smob (); | |
263 | value_smob *v_smob = (value_smob *) SCM_SMOB_DATA (v_scm); | |
264 | ||
265 | v_smob->value = value; | |
266 | release_value_or_incref (value); | |
267 | vlscm_remember_scheme_value (v_smob); | |
268 | ||
269 | return v_scm; | |
270 | } | |
271 | ||
272 | /* Returns the <gdb:value> object in SELF. | |
273 | Throws an exception if SELF is not a <gdb:value> object. */ | |
274 | ||
275 | static SCM | |
276 | vlscm_get_value_arg_unsafe (SCM self, int arg_pos, const char *func_name) | |
277 | { | |
278 | SCM_ASSERT_TYPE (vlscm_is_value (self), self, arg_pos, func_name, | |
279 | value_smob_name); | |
280 | ||
281 | return self; | |
282 | } | |
283 | ||
284 | /* Returns a pointer to the value smob of SELF. | |
285 | Throws an exception if SELF is not a <gdb:value> object. */ | |
286 | ||
287 | static value_smob * | |
288 | vlscm_get_value_smob_arg_unsafe (SCM self, int arg_pos, const char *func_name) | |
289 | { | |
290 | SCM v_scm = vlscm_get_value_arg_unsafe (self, arg_pos, func_name); | |
291 | value_smob *v_smob = (value_smob *) SCM_SMOB_DATA (v_scm); | |
292 | ||
293 | return v_smob; | |
294 | } | |
295 | ||
296 | /* Return the value field of V_SCM, an object of type <gdb:value>. | |
297 | This exists so that we don't have to export the struct's contents. */ | |
298 | ||
299 | struct value * | |
300 | vlscm_scm_to_value (SCM v_scm) | |
301 | { | |
302 | value_smob *v_smob; | |
303 | ||
304 | gdb_assert (vlscm_is_value (v_scm)); | |
305 | v_smob = (value_smob *) SCM_SMOB_DATA (v_scm); | |
306 | return v_smob->value; | |
307 | } | |
308 | \f | |
309 | /* Value methods. */ | |
310 | ||
311 | /* (make-value x [#:type type]) -> <gdb:value> */ | |
312 | ||
313 | static SCM | |
314 | gdbscm_make_value (SCM x, SCM rest) | |
315 | { | |
316 | struct gdbarch *gdbarch = get_current_arch (); | |
317 | const struct language_defn *language = current_language; | |
318 | const SCM keywords[] = { type_keyword, SCM_BOOL_F }; | |
319 | int type_arg_pos = -1; | |
320 | SCM type_scm = SCM_UNDEFINED; | |
321 | SCM except_scm, result; | |
322 | type_smob *t_smob; | |
323 | struct type *type = NULL; | |
324 | struct value *value; | |
325 | struct cleanup *cleanups; | |
326 | ||
327 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG2, keywords, "#O", rest, | |
328 | &type_arg_pos, &type_scm); | |
329 | ||
330 | if (type_arg_pos > 0) | |
331 | { | |
332 | t_smob = tyscm_get_type_smob_arg_unsafe (type_scm, type_arg_pos, | |
333 | FUNC_NAME); | |
334 | type = tyscm_type_smob_type (t_smob); | |
335 | } | |
336 | ||
337 | cleanups = make_cleanup_value_free_to_mark (value_mark ()); | |
338 | ||
339 | value = vlscm_convert_typed_value_from_scheme (FUNC_NAME, SCM_ARG1, x, | |
340 | type_arg_pos, type_scm, type, | |
341 | &except_scm, | |
342 | gdbarch, language); | |
343 | if (value == NULL) | |
344 | { | |
345 | do_cleanups (cleanups); | |
346 | gdbscm_throw (except_scm); | |
347 | } | |
348 | ||
349 | result = vlscm_scm_from_value (value); | |
350 | ||
351 | do_cleanups (cleanups); | |
352 | ||
353 | if (gdbscm_is_exception (result)) | |
354 | gdbscm_throw (result); | |
355 | return result; | |
356 | } | |
357 | ||
358 | /* (make-lazy-value <gdb:type> address) -> <gdb:value> */ | |
359 | ||
360 | static SCM | |
361 | gdbscm_make_lazy_value (SCM type_scm, SCM address_scm) | |
362 | { | |
363 | type_smob *t_smob; | |
364 | struct type *type; | |
365 | ULONGEST address; | |
366 | struct value *value = NULL; | |
367 | SCM result; | |
368 | struct cleanup *cleanups; | |
ed3ef339 DE |
369 | |
370 | t_smob = tyscm_get_type_smob_arg_unsafe (type_scm, SCM_ARG1, FUNC_NAME); | |
371 | type = tyscm_type_smob_type (t_smob); | |
372 | ||
373 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG2, NULL, "U", | |
374 | address_scm, &address); | |
375 | ||
376 | cleanups = make_cleanup_value_free_to_mark (value_mark ()); | |
377 | ||
378 | /* There's no (current) need to wrap this in a TRY_CATCH, but for consistency | |
379 | and future-proofing we do. */ | |
492d29ea | 380 | TRY |
ed3ef339 DE |
381 | { |
382 | value = value_from_contents_and_address (type, NULL, address); | |
383 | } | |
492d29ea PA |
384 | CATCH (except, RETURN_MASK_ALL) |
385 | { | |
386 | GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups); | |
387 | } | |
388 | END_CATCH | |
ed3ef339 DE |
389 | |
390 | result = vlscm_scm_from_value (value); | |
391 | ||
392 | do_cleanups (cleanups); | |
393 | ||
394 | if (gdbscm_is_exception (result)) | |
395 | gdbscm_throw (result); | |
396 | return result; | |
397 | } | |
398 | ||
399 | /* (value-optimized-out? <gdb:value>) -> boolean */ | |
400 | ||
401 | static SCM | |
402 | gdbscm_value_optimized_out_p (SCM self) | |
403 | { | |
404 | value_smob *v_smob | |
405 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
406 | struct value *value = v_smob->value; | |
407 | int opt = 0; | |
ed3ef339 | 408 | |
492d29ea | 409 | TRY |
ed3ef339 DE |
410 | { |
411 | opt = value_optimized_out (value); | |
412 | } | |
492d29ea PA |
413 | CATCH (except, RETURN_MASK_ALL) |
414 | { | |
415 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
416 | } | |
417 | END_CATCH | |
ed3ef339 DE |
418 | |
419 | return scm_from_bool (opt); | |
420 | } | |
421 | ||
422 | /* (value-address <gdb:value>) -> integer | |
423 | Returns #f if the value doesn't have one. */ | |
424 | ||
425 | static SCM | |
426 | gdbscm_value_address (SCM self) | |
427 | { | |
428 | value_smob *v_smob | |
429 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
430 | struct value *value = v_smob->value; | |
431 | ||
432 | if (SCM_UNBNDP (v_smob->address)) | |
433 | { | |
434 | struct value *res_val = NULL; | |
435 | struct cleanup *cleanup | |
436 | = make_cleanup_value_free_to_mark (value_mark ()); | |
437 | SCM address; | |
ed3ef339 | 438 | |
492d29ea | 439 | TRY |
ed3ef339 DE |
440 | { |
441 | res_val = value_addr (value); | |
442 | } | |
492d29ea PA |
443 | CATCH (except, RETURN_MASK_ALL) |
444 | { | |
445 | address = SCM_BOOL_F; | |
446 | } | |
447 | END_CATCH | |
448 | ||
449 | if (res_val != NULL) | |
ed3ef339 DE |
450 | address = vlscm_scm_from_value (res_val); |
451 | ||
452 | do_cleanups (cleanup); | |
453 | ||
454 | if (gdbscm_is_exception (address)) | |
455 | gdbscm_throw (address); | |
456 | ||
457 | v_smob->address = address; | |
458 | } | |
459 | ||
460 | return v_smob->address; | |
461 | } | |
462 | ||
463 | /* (value-dereference <gdb:value>) -> <gdb:value> | |
464 | Given a value of a pointer type, apply the C unary * operator to it. */ | |
465 | ||
466 | static SCM | |
467 | gdbscm_value_dereference (SCM self) | |
468 | { | |
469 | value_smob *v_smob | |
470 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
471 | struct value *value = v_smob->value; | |
472 | SCM result; | |
473 | struct value *res_val = NULL; | |
474 | struct cleanup *cleanups; | |
ed3ef339 DE |
475 | |
476 | cleanups = make_cleanup_value_free_to_mark (value_mark ()); | |
477 | ||
492d29ea | 478 | TRY |
ed3ef339 DE |
479 | { |
480 | res_val = value_ind (value); | |
481 | } | |
492d29ea PA |
482 | CATCH (except, RETURN_MASK_ALL) |
483 | { | |
484 | GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups); | |
485 | } | |
486 | END_CATCH | |
ed3ef339 DE |
487 | |
488 | result = vlscm_scm_from_value (res_val); | |
489 | ||
490 | do_cleanups (cleanups); | |
491 | ||
492 | if (gdbscm_is_exception (result)) | |
493 | gdbscm_throw (result); | |
494 | ||
495 | return result; | |
496 | } | |
497 | ||
498 | /* (value-referenced-value <gdb:value>) -> <gdb:value> | |
499 | Given a value of a reference type, return the value referenced. | |
500 | The difference between this function and gdbscm_value_dereference is that | |
501 | the latter applies * unary operator to a value, which need not always | |
502 | result in the value referenced. | |
503 | For example, for a value which is a reference to an 'int' pointer ('int *'), | |
504 | gdbscm_value_dereference will result in a value of type 'int' while | |
505 | gdbscm_value_referenced_value will result in a value of type 'int *'. */ | |
506 | ||
507 | static SCM | |
508 | gdbscm_value_referenced_value (SCM self) | |
509 | { | |
510 | value_smob *v_smob | |
511 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
512 | struct value *value = v_smob->value; | |
513 | SCM result; | |
514 | struct value *res_val = NULL; | |
515 | struct cleanup *cleanups; | |
ed3ef339 DE |
516 | |
517 | cleanups = make_cleanup_value_free_to_mark (value_mark ()); | |
518 | ||
492d29ea | 519 | TRY |
ed3ef339 DE |
520 | { |
521 | switch (TYPE_CODE (check_typedef (value_type (value)))) | |
522 | { | |
523 | case TYPE_CODE_PTR: | |
524 | res_val = value_ind (value); | |
525 | break; | |
526 | case TYPE_CODE_REF: | |
527 | res_val = coerce_ref (value); | |
528 | break; | |
529 | default: | |
530 | error (_("Trying to get the referenced value from a value which is" | |
531 | " neither a pointer nor a reference")); | |
532 | } | |
533 | } | |
492d29ea PA |
534 | CATCH (except, RETURN_MASK_ALL) |
535 | { | |
536 | GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups); | |
537 | } | |
538 | END_CATCH | |
ed3ef339 DE |
539 | |
540 | result = vlscm_scm_from_value (res_val); | |
541 | ||
542 | do_cleanups (cleanups); | |
543 | ||
544 | if (gdbscm_is_exception (result)) | |
545 | gdbscm_throw (result); | |
546 | ||
547 | return result; | |
548 | } | |
549 | ||
550 | /* (value-type <gdb:value>) -> <gdb:type> */ | |
551 | ||
552 | static SCM | |
553 | gdbscm_value_type (SCM self) | |
554 | { | |
555 | value_smob *v_smob | |
556 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
557 | struct value *value = v_smob->value; | |
558 | ||
559 | if (SCM_UNBNDP (v_smob->type)) | |
560 | v_smob->type = tyscm_scm_from_type (value_type (value)); | |
561 | ||
562 | return v_smob->type; | |
563 | } | |
564 | ||
565 | /* (value-dynamic-type <gdb:value>) -> <gdb:type> */ | |
566 | ||
567 | static SCM | |
568 | gdbscm_value_dynamic_type (SCM self) | |
569 | { | |
570 | value_smob *v_smob | |
571 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
572 | struct value *value = v_smob->value; | |
573 | struct type *type = NULL; | |
ed3ef339 | 574 | |
1390d0ef | 575 | if (! SCM_UNBNDP (v_smob->dynamic_type)) |
ed3ef339 DE |
576 | return v_smob->dynamic_type; |
577 | ||
492d29ea | 578 | TRY |
ed3ef339 DE |
579 | { |
580 | struct cleanup *cleanup | |
581 | = make_cleanup_value_free_to_mark (value_mark ()); | |
582 | ||
583 | type = value_type (value); | |
f168693b | 584 | type = check_typedef (type); |
ed3ef339 DE |
585 | |
586 | if (((TYPE_CODE (type) == TYPE_CODE_PTR) | |
587 | || (TYPE_CODE (type) == TYPE_CODE_REF)) | |
4753d33b | 588 | && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT)) |
ed3ef339 DE |
589 | { |
590 | struct value *target; | |
591 | int was_pointer = TYPE_CODE (type) == TYPE_CODE_PTR; | |
592 | ||
0be03e84 DE |
593 | if (was_pointer) |
594 | target = value_ind (value); | |
595 | else | |
596 | target = coerce_ref (value); | |
ed3ef339 DE |
597 | type = value_rtti_type (target, NULL, NULL, NULL); |
598 | ||
599 | if (type) | |
600 | { | |
601 | if (was_pointer) | |
602 | type = lookup_pointer_type (type); | |
603 | else | |
604 | type = lookup_reference_type (type); | |
605 | } | |
606 | } | |
4753d33b | 607 | else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) |
ed3ef339 DE |
608 | type = value_rtti_type (value, NULL, NULL, NULL); |
609 | else | |
610 | { | |
611 | /* Re-use object's static type. */ | |
612 | type = NULL; | |
613 | } | |
614 | ||
615 | do_cleanups (cleanup); | |
616 | } | |
492d29ea PA |
617 | CATCH (except, RETURN_MASK_ALL) |
618 | { | |
619 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
620 | } | |
621 | END_CATCH | |
ed3ef339 DE |
622 | |
623 | if (type == NULL) | |
624 | v_smob->dynamic_type = gdbscm_value_type (self); | |
625 | else | |
626 | v_smob->dynamic_type = tyscm_scm_from_type (type); | |
627 | ||
628 | return v_smob->dynamic_type; | |
629 | } | |
630 | ||
631 | /* A helper function that implements the various cast operators. */ | |
632 | ||
633 | static SCM | |
634 | vlscm_do_cast (SCM self, SCM type_scm, enum exp_opcode op, | |
635 | const char *func_name) | |
636 | { | |
637 | value_smob *v_smob | |
638 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
639 | struct value *value = v_smob->value; | |
640 | type_smob *t_smob | |
641 | = tyscm_get_type_smob_arg_unsafe (type_scm, SCM_ARG2, FUNC_NAME); | |
642 | struct type *type = tyscm_type_smob_type (t_smob); | |
643 | SCM result; | |
644 | struct value *res_val = NULL; | |
645 | struct cleanup *cleanups; | |
ed3ef339 DE |
646 | |
647 | cleanups = make_cleanup_value_free_to_mark (value_mark ()); | |
648 | ||
492d29ea | 649 | TRY |
ed3ef339 DE |
650 | { |
651 | if (op == UNOP_DYNAMIC_CAST) | |
652 | res_val = value_dynamic_cast (type, value); | |
653 | else if (op == UNOP_REINTERPRET_CAST) | |
654 | res_val = value_reinterpret_cast (type, value); | |
655 | else | |
656 | { | |
657 | gdb_assert (op == UNOP_CAST); | |
658 | res_val = value_cast (type, value); | |
659 | } | |
660 | } | |
492d29ea PA |
661 | CATCH (except, RETURN_MASK_ALL) |
662 | { | |
663 | GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups); | |
664 | } | |
665 | END_CATCH | |
ed3ef339 DE |
666 | |
667 | gdb_assert (res_val != NULL); | |
668 | result = vlscm_scm_from_value (res_val); | |
669 | ||
670 | do_cleanups (cleanups); | |
671 | ||
672 | if (gdbscm_is_exception (result)) | |
673 | gdbscm_throw (result); | |
674 | ||
675 | return result; | |
676 | } | |
677 | ||
678 | /* (value-cast <gdb:value> <gdb:type>) -> <gdb:value> */ | |
679 | ||
680 | static SCM | |
681 | gdbscm_value_cast (SCM self, SCM new_type) | |
682 | { | |
683 | return vlscm_do_cast (self, new_type, UNOP_CAST, FUNC_NAME); | |
684 | } | |
685 | ||
686 | /* (value-dynamic-cast <gdb:value> <gdb:type>) -> <gdb:value> */ | |
687 | ||
688 | static SCM | |
689 | gdbscm_value_dynamic_cast (SCM self, SCM new_type) | |
690 | { | |
691 | return vlscm_do_cast (self, new_type, UNOP_DYNAMIC_CAST, FUNC_NAME); | |
692 | } | |
693 | ||
694 | /* (value-reinterpret-cast <gdb:value> <gdb:type>) -> <gdb:value> */ | |
695 | ||
696 | static SCM | |
697 | gdbscm_value_reinterpret_cast (SCM self, SCM new_type) | |
698 | { | |
699 | return vlscm_do_cast (self, new_type, UNOP_REINTERPRET_CAST, FUNC_NAME); | |
700 | } | |
701 | ||
702 | /* (value-field <gdb:value> string) -> <gdb:value> | |
703 | Given string name of an element inside structure, return its <gdb:value> | |
704 | object. */ | |
705 | ||
706 | static SCM | |
707 | gdbscm_value_field (SCM self, SCM field_scm) | |
708 | { | |
709 | value_smob *v_smob | |
710 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
711 | struct value *value = v_smob->value; | |
712 | char *field = NULL; | |
713 | struct value *res_val = NULL; | |
714 | SCM result; | |
715 | struct cleanup *cleanups; | |
ed3ef339 DE |
716 | |
717 | SCM_ASSERT_TYPE (scm_is_string (field_scm), field_scm, SCM_ARG2, FUNC_NAME, | |
718 | _("string")); | |
719 | ||
720 | cleanups = make_cleanup_value_free_to_mark (value_mark ()); | |
721 | ||
722 | field = gdbscm_scm_to_c_string (field_scm); | |
723 | make_cleanup (xfree, field); | |
724 | ||
492d29ea | 725 | TRY |
ed3ef339 DE |
726 | { |
727 | struct value *tmp = value; | |
728 | ||
729 | res_val = value_struct_elt (&tmp, NULL, field, NULL, NULL); | |
730 | } | |
492d29ea PA |
731 | CATCH (except, RETURN_MASK_ALL) |
732 | { | |
733 | GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups); | |
734 | } | |
735 | END_CATCH | |
ed3ef339 DE |
736 | |
737 | gdb_assert (res_val != NULL); | |
738 | result = vlscm_scm_from_value (res_val); | |
739 | ||
740 | do_cleanups (cleanups); | |
741 | ||
742 | if (gdbscm_is_exception (result)) | |
743 | gdbscm_throw (result); | |
744 | ||
745 | return result; | |
746 | } | |
747 | ||
748 | /* (value-subscript <gdb:value> integer|<gdb:value>) -> <gdb:value> | |
749 | Return the specified value in an array. */ | |
750 | ||
751 | static SCM | |
752 | gdbscm_value_subscript (SCM self, SCM index_scm) | |
753 | { | |
754 | value_smob *v_smob | |
755 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
756 | struct value *value = v_smob->value; | |
757 | struct value *index = NULL; | |
758 | struct value *res_val = NULL; | |
759 | struct type *type = value_type (value); | |
760 | struct gdbarch *gdbarch; | |
761 | SCM result, except_scm; | |
762 | struct cleanup *cleanups; | |
ed3ef339 DE |
763 | |
764 | /* The sequencing here, as everywhere else, is important. | |
765 | We can't have existing cleanups when a Scheme exception is thrown. */ | |
766 | ||
767 | SCM_ASSERT (type != NULL, self, SCM_ARG2, FUNC_NAME); | |
768 | gdbarch = get_type_arch (type); | |
769 | ||
770 | cleanups = make_cleanup_value_free_to_mark (value_mark ()); | |
771 | ||
772 | index = vlscm_convert_value_from_scheme (FUNC_NAME, SCM_ARG2, index_scm, | |
773 | &except_scm, | |
774 | gdbarch, current_language); | |
775 | if (index == NULL) | |
776 | { | |
777 | do_cleanups (cleanups); | |
778 | gdbscm_throw (except_scm); | |
779 | } | |
780 | ||
492d29ea | 781 | TRY |
ed3ef339 DE |
782 | { |
783 | struct value *tmp = value; | |
784 | ||
785 | /* Assume we are attempting an array access, and let the value code | |
786 | throw an exception if the index has an invalid type. | |
787 | Check the value's type is something that can be accessed via | |
788 | a subscript. */ | |
789 | tmp = coerce_ref (tmp); | |
790 | type = check_typedef (value_type (tmp)); | |
791 | if (TYPE_CODE (type) != TYPE_CODE_ARRAY | |
792 | && TYPE_CODE (type) != TYPE_CODE_PTR) | |
793 | error (_("Cannot subscript requested type")); | |
794 | ||
795 | res_val = value_subscript (tmp, value_as_long (index)); | |
796 | } | |
492d29ea PA |
797 | CATCH (except, RETURN_MASK_ALL) |
798 | { | |
799 | GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups); | |
800 | } | |
801 | END_CATCH | |
ed3ef339 DE |
802 | |
803 | gdb_assert (res_val != NULL); | |
804 | result = vlscm_scm_from_value (res_val); | |
805 | ||
806 | do_cleanups (cleanups); | |
807 | ||
808 | if (gdbscm_is_exception (result)) | |
809 | gdbscm_throw (result); | |
810 | ||
811 | return result; | |
812 | } | |
813 | ||
814 | /* (value-call <gdb:value> arg-list) -> <gdb:value> | |
815 | Perform an inferior function call on the value. */ | |
816 | ||
817 | static SCM | |
818 | gdbscm_value_call (SCM self, SCM args) | |
819 | { | |
820 | value_smob *v_smob | |
821 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
822 | struct value *function = v_smob->value; | |
823 | struct value *mark = value_mark (); | |
824 | struct type *ftype = NULL; | |
825 | long args_count; | |
826 | struct value **vargs = NULL; | |
827 | SCM result = SCM_BOOL_F; | |
ed3ef339 | 828 | |
492d29ea | 829 | TRY |
ed3ef339 DE |
830 | { |
831 | ftype = check_typedef (value_type (function)); | |
832 | } | |
492d29ea PA |
833 | CATCH (except, RETURN_MASK_ALL) |
834 | { | |
835 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
836 | } | |
837 | END_CATCH | |
ed3ef339 DE |
838 | |
839 | SCM_ASSERT_TYPE (TYPE_CODE (ftype) == TYPE_CODE_FUNC, self, | |
840 | SCM_ARG1, FUNC_NAME, | |
841 | _("function (value of TYPE_CODE_FUNC)")); | |
842 | ||
843 | SCM_ASSERT_TYPE (gdbscm_is_true (scm_list_p (args)), args, | |
844 | SCM_ARG2, FUNC_NAME, _("list")); | |
845 | ||
846 | args_count = scm_ilength (args); | |
847 | if (args_count > 0) | |
848 | { | |
849 | struct gdbarch *gdbarch = get_current_arch (); | |
850 | const struct language_defn *language = current_language; | |
851 | SCM except_scm; | |
852 | long i; | |
853 | ||
8d749320 | 854 | vargs = XALLOCAVEC (struct value *, args_count); |
ed3ef339 DE |
855 | for (i = 0; i < args_count; i++) |
856 | { | |
857 | SCM arg = scm_car (args); | |
858 | ||
859 | vargs[i] = vlscm_convert_value_from_scheme (FUNC_NAME, | |
860 | GDBSCM_ARG_NONE, arg, | |
861 | &except_scm, | |
862 | gdbarch, language); | |
863 | if (vargs[i] == NULL) | |
864 | gdbscm_throw (except_scm); | |
865 | ||
866 | args = scm_cdr (args); | |
867 | } | |
868 | gdb_assert (gdbscm_is_true (scm_null_p (args))); | |
869 | } | |
870 | ||
492d29ea | 871 | TRY |
ed3ef339 DE |
872 | { |
873 | struct cleanup *cleanup = make_cleanup_value_free_to_mark (mark); | |
874 | struct value *return_value; | |
875 | ||
876 | return_value = call_function_by_hand (function, args_count, vargs); | |
877 | result = vlscm_scm_from_value (return_value); | |
878 | do_cleanups (cleanup); | |
879 | } | |
492d29ea PA |
880 | CATCH (except, RETURN_MASK_ALL) |
881 | { | |
882 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
883 | } | |
884 | END_CATCH | |
ed3ef339 DE |
885 | |
886 | if (gdbscm_is_exception (result)) | |
887 | gdbscm_throw (result); | |
888 | ||
889 | return result; | |
890 | } | |
891 | ||
892 | /* (value->bytevector <gdb:value>) -> bytevector */ | |
893 | ||
894 | static SCM | |
895 | gdbscm_value_to_bytevector (SCM self) | |
896 | { | |
897 | value_smob *v_smob | |
898 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
899 | struct value *value = v_smob->value; | |
900 | struct type *type; | |
901 | size_t length = 0; | |
902 | const gdb_byte *contents = NULL; | |
903 | SCM bv; | |
ed3ef339 DE |
904 | |
905 | type = value_type (value); | |
906 | ||
492d29ea | 907 | TRY |
ed3ef339 | 908 | { |
f168693b | 909 | type = check_typedef (type); |
ed3ef339 DE |
910 | length = TYPE_LENGTH (type); |
911 | contents = value_contents (value); | |
912 | } | |
492d29ea PA |
913 | CATCH (except, RETURN_MASK_ALL) |
914 | { | |
915 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
916 | } | |
917 | END_CATCH | |
ed3ef339 DE |
918 | |
919 | bv = scm_c_make_bytevector (length); | |
920 | memcpy (SCM_BYTEVECTOR_CONTENTS (bv), contents, length); | |
921 | ||
922 | return bv; | |
923 | } | |
924 | ||
925 | /* Helper function to determine if a type is "int-like". */ | |
926 | ||
927 | static int | |
928 | is_intlike (struct type *type, int ptr_ok) | |
929 | { | |
930 | return (TYPE_CODE (type) == TYPE_CODE_INT | |
931 | || TYPE_CODE (type) == TYPE_CODE_ENUM | |
932 | || TYPE_CODE (type) == TYPE_CODE_BOOL | |
933 | || TYPE_CODE (type) == TYPE_CODE_CHAR | |
934 | || (ptr_ok && TYPE_CODE (type) == TYPE_CODE_PTR)); | |
935 | } | |
936 | ||
937 | /* (value->bool <gdb:value>) -> boolean | |
938 | Throws an error if the value is not integer-like. */ | |
939 | ||
940 | static SCM | |
941 | gdbscm_value_to_bool (SCM self) | |
942 | { | |
943 | value_smob *v_smob | |
944 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
945 | struct value *value = v_smob->value; | |
946 | struct type *type; | |
947 | LONGEST l = 0; | |
ed3ef339 DE |
948 | |
949 | type = value_type (value); | |
950 | ||
492d29ea | 951 | TRY |
ed3ef339 | 952 | { |
f168693b | 953 | type = check_typedef (type); |
ed3ef339 | 954 | } |
492d29ea PA |
955 | CATCH (except, RETURN_MASK_ALL) |
956 | { | |
957 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
958 | } | |
959 | END_CATCH | |
ed3ef339 DE |
960 | |
961 | SCM_ASSERT_TYPE (is_intlike (type, 1), self, SCM_ARG1, FUNC_NAME, | |
962 | _("integer-like gdb value")); | |
963 | ||
492d29ea | 964 | TRY |
ed3ef339 DE |
965 | { |
966 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
967 | l = value_as_address (value); | |
968 | else | |
969 | l = value_as_long (value); | |
970 | } | |
492d29ea PA |
971 | CATCH (except, RETURN_MASK_ALL) |
972 | { | |
973 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
974 | } | |
975 | END_CATCH | |
ed3ef339 DE |
976 | |
977 | return scm_from_bool (l != 0); | |
978 | } | |
979 | ||
980 | /* (value->integer <gdb:value>) -> integer | |
981 | Throws an error if the value is not integer-like. */ | |
982 | ||
983 | static SCM | |
984 | gdbscm_value_to_integer (SCM self) | |
985 | { | |
986 | value_smob *v_smob | |
987 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
988 | struct value *value = v_smob->value; | |
989 | struct type *type; | |
990 | LONGEST l = 0; | |
ed3ef339 DE |
991 | |
992 | type = value_type (value); | |
993 | ||
492d29ea | 994 | TRY |
ed3ef339 | 995 | { |
f168693b | 996 | type = check_typedef (type); |
ed3ef339 | 997 | } |
492d29ea PA |
998 | CATCH (except, RETURN_MASK_ALL) |
999 | { | |
1000 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
1001 | } | |
1002 | END_CATCH | |
ed3ef339 DE |
1003 | |
1004 | SCM_ASSERT_TYPE (is_intlike (type, 1), self, SCM_ARG1, FUNC_NAME, | |
1005 | _("integer-like gdb value")); | |
1006 | ||
492d29ea | 1007 | TRY |
ed3ef339 DE |
1008 | { |
1009 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
1010 | l = value_as_address (value); | |
1011 | else | |
1012 | l = value_as_long (value); | |
1013 | } | |
492d29ea PA |
1014 | CATCH (except, RETURN_MASK_ALL) |
1015 | { | |
1016 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
1017 | } | |
1018 | END_CATCH | |
ed3ef339 DE |
1019 | |
1020 | if (TYPE_UNSIGNED (type)) | |
1021 | return gdbscm_scm_from_ulongest (l); | |
1022 | else | |
1023 | return gdbscm_scm_from_longest (l); | |
1024 | } | |
1025 | ||
1026 | /* (value->real <gdb:value>) -> real | |
1027 | Throws an error if the value is not a number. */ | |
1028 | ||
1029 | static SCM | |
1030 | gdbscm_value_to_real (SCM self) | |
1031 | { | |
1032 | value_smob *v_smob | |
1033 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
1034 | struct value *value = v_smob->value; | |
1035 | struct type *type; | |
1036 | DOUBLEST d = 0; | |
ed3ef339 DE |
1037 | |
1038 | type = value_type (value); | |
1039 | ||
492d29ea | 1040 | TRY |
ed3ef339 | 1041 | { |
f168693b | 1042 | type = check_typedef (type); |
ed3ef339 | 1043 | } |
492d29ea PA |
1044 | CATCH (except, RETURN_MASK_ALL) |
1045 | { | |
1046 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
1047 | } | |
1048 | END_CATCH | |
ed3ef339 DE |
1049 | |
1050 | SCM_ASSERT_TYPE (is_intlike (type, 0) || TYPE_CODE (type) == TYPE_CODE_FLT, | |
1051 | self, SCM_ARG1, FUNC_NAME, _("number")); | |
1052 | ||
492d29ea | 1053 | TRY |
ed3ef339 DE |
1054 | { |
1055 | d = value_as_double (value); | |
1056 | } | |
492d29ea PA |
1057 | CATCH (except, RETURN_MASK_ALL) |
1058 | { | |
1059 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
1060 | } | |
1061 | END_CATCH | |
ed3ef339 DE |
1062 | |
1063 | /* TODO: Is there a better way to check if the value fits? */ | |
1064 | if (d != (double) d) | |
1065 | gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, | |
1066 | _("number can't be converted to a double")); | |
1067 | ||
1068 | return scm_from_double (d); | |
1069 | } | |
1070 | ||
1071 | /* (value->string <gdb:value> | |
1072 | [#:encoding encoding] | |
1073 | [#:errors #f | 'error | 'substitute] | |
1074 | [#:length length]) | |
1075 | -> string | |
1076 | Return Unicode string with value's contents, which must be a string. | |
1077 | ||
1078 | If ENCODING is not given, the string is assumed to be encoded in | |
1079 | the target's charset. | |
1080 | ||
1081 | ERRORS is one of #f, 'error or 'substitute. | |
d2929fdc DE |
1082 | An error setting of #f means use the default, which is Guile's |
1083 | %default-port-conversion-strategy when using Guile >= 2.0.6, or 'error if | |
1084 | using an earlier version of Guile. Earlier versions do not properly | |
1085 | support obtaining the default port conversion strategy. | |
1086 | If the default is not one of 'error or 'substitute, 'substitute is used. | |
ed3ef339 DE |
1087 | An error setting of "error" causes an exception to be thrown if there's |
1088 | a decoding error. An error setting of "substitute" causes invalid | |
1089 | characters to be replaced with "?". | |
1090 | ||
1091 | If LENGTH is provided, only fetch string to the length provided. | |
1092 | LENGTH must be a Scheme integer, it can't be a <gdb:value> integer. */ | |
1093 | ||
1094 | static SCM | |
1095 | gdbscm_value_to_string (SCM self, SCM rest) | |
1096 | { | |
1097 | value_smob *v_smob | |
1098 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
1099 | struct value *value = v_smob->value; | |
1100 | const SCM keywords[] = { | |
1101 | encoding_keyword, errors_keyword, length_keyword, SCM_BOOL_F | |
1102 | }; | |
1103 | int encoding_arg_pos = -1, errors_arg_pos = -1, length_arg_pos = -1; | |
1104 | char *encoding = NULL; | |
1105 | SCM errors = SCM_BOOL_F; | |
1106 | int length = -1; | |
1107 | gdb_byte *buffer = NULL; | |
1108 | const char *la_encoding = NULL; | |
1109 | struct type *char_type = NULL; | |
1110 | SCM result; | |
1111 | struct cleanup *cleanups; | |
ed3ef339 DE |
1112 | |
1113 | /* The sequencing here, as everywhere else, is important. | |
1114 | We can't have existing cleanups when a Scheme exception is thrown. */ | |
1115 | ||
1116 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG2, keywords, "#sOi", rest, | |
1117 | &encoding_arg_pos, &encoding, | |
1118 | &errors_arg_pos, &errors, | |
1119 | &length_arg_pos, &length); | |
1120 | ||
1121 | cleanups = make_cleanup (xfree, encoding); | |
1122 | ||
1123 | if (errors_arg_pos > 0 | |
1124 | && errors != SCM_BOOL_F | |
1125 | && !scm_is_eq (errors, error_symbol) | |
1126 | && !scm_is_eq (errors, substitute_symbol)) | |
1127 | { | |
1128 | SCM excp | |
1129 | = gdbscm_make_out_of_range_error (FUNC_NAME, errors_arg_pos, errors, | |
1130 | _("invalid error kind")); | |
1131 | ||
1132 | do_cleanups (cleanups); | |
1133 | gdbscm_throw (excp); | |
1134 | } | |
1135 | if (errors == SCM_BOOL_F) | |
d2929fdc DE |
1136 | { |
1137 | /* N.B. scm_port_conversion_strategy in Guile versions prior to 2.0.6 | |
1138 | will throw a Scheme error when passed #f. */ | |
1139 | if (gdbscm_guile_version_is_at_least (2, 0, 6)) | |
1140 | errors = scm_port_conversion_strategy (SCM_BOOL_F); | |
1141 | else | |
1142 | errors = error_symbol; | |
1143 | } | |
ed3ef339 DE |
1144 | /* We don't assume anything about the result of scm_port_conversion_strategy. |
1145 | From this point on, if errors is not 'errors, use 'substitute. */ | |
1146 | ||
492d29ea | 1147 | TRY |
ed3ef339 DE |
1148 | { |
1149 | LA_GET_STRING (value, &buffer, &length, &char_type, &la_encoding); | |
1150 | } | |
492d29ea PA |
1151 | CATCH (except, RETURN_MASK_ALL) |
1152 | { | |
1153 | GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups); | |
1154 | } | |
1155 | END_CATCH | |
ed3ef339 DE |
1156 | |
1157 | /* If errors is "error" scm_from_stringn may throw a Scheme exception. | |
1158 | Make sure we don't leak. This is done via scm_dynwind_begin, et.al. */ | |
1159 | discard_cleanups (cleanups); | |
1160 | ||
c6486df5 | 1161 | scm_dynwind_begin ((scm_t_dynwind_flags) 0); |
ed3ef339 DE |
1162 | |
1163 | gdbscm_dynwind_xfree (encoding); | |
1164 | gdbscm_dynwind_xfree (buffer); | |
1165 | ||
1166 | result = scm_from_stringn ((const char *) buffer, | |
1167 | length * TYPE_LENGTH (char_type), | |
1168 | (encoding != NULL && *encoding != '\0' | |
1169 | ? encoding | |
1170 | : la_encoding), | |
1171 | scm_is_eq (errors, error_symbol) | |
1172 | ? SCM_FAILED_CONVERSION_ERROR | |
1173 | : SCM_FAILED_CONVERSION_QUESTION_MARK); | |
1174 | ||
1175 | scm_dynwind_end (); | |
1176 | ||
1177 | return result; | |
1178 | } | |
1179 | ||
1180 | /* (value->lazy-string <gdb:value> [#:encoding encoding] [#:length length]) | |
1181 | -> <gdb:lazy-string> | |
1182 | Return a Scheme object representing a lazy_string_object type. | |
1183 | A lazy string is a pointer to a string with an optional encoding and length. | |
1184 | If ENCODING is not given, the target's charset is used. | |
1185 | If LENGTH is provided then the length parameter is set to LENGTH, otherwise | |
1186 | length will be set to -1 (first null of appropriate with). | |
1187 | LENGTH must be a Scheme integer, it can't be a <gdb:value> integer. */ | |
1188 | ||
1189 | static SCM | |
1190 | gdbscm_value_to_lazy_string (SCM self, SCM rest) | |
1191 | { | |
1192 | value_smob *v_smob | |
1193 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
1194 | struct value *value = v_smob->value; | |
1195 | const SCM keywords[] = { encoding_keyword, length_keyword, SCM_BOOL_F }; | |
1196 | int encoding_arg_pos = -1, length_arg_pos = -1; | |
1197 | char *encoding = NULL; | |
1198 | int length = -1; | |
1199 | SCM result = SCM_BOOL_F; /* -Wall */ | |
1200 | struct cleanup *cleanups; | |
492d29ea | 1201 | struct gdb_exception except = exception_none; |
ed3ef339 DE |
1202 | |
1203 | /* The sequencing here, as everywhere else, is important. | |
1204 | We can't have existing cleanups when a Scheme exception is thrown. */ | |
1205 | ||
1206 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG2, keywords, "#si", rest, | |
1207 | &encoding_arg_pos, &encoding, | |
1208 | &length_arg_pos, &length); | |
1209 | ||
1210 | cleanups = make_cleanup (xfree, encoding); | |
1211 | ||
492d29ea | 1212 | TRY |
ed3ef339 DE |
1213 | { |
1214 | struct cleanup *inner_cleanup | |
1215 | = make_cleanup_value_free_to_mark (value_mark ()); | |
1216 | ||
1217 | if (TYPE_CODE (value_type (value)) == TYPE_CODE_PTR) | |
1218 | value = value_ind (value); | |
1219 | ||
1220 | result = lsscm_make_lazy_string (value_address (value), length, | |
1221 | encoding, value_type (value)); | |
1222 | ||
1223 | do_cleanups (inner_cleanup); | |
1224 | } | |
492d29ea PA |
1225 | CATCH (ex, RETURN_MASK_ALL) |
1226 | { | |
1227 | except = ex; | |
1228 | } | |
1229 | END_CATCH | |
1230 | ||
ed3ef339 DE |
1231 | do_cleanups (cleanups); |
1232 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
1233 | ||
1234 | if (gdbscm_is_exception (result)) | |
1235 | gdbscm_throw (result); | |
1236 | ||
1237 | return result; | |
1238 | } | |
1239 | ||
1240 | /* (value-lazy? <gdb:value>) -> boolean */ | |
1241 | ||
1242 | static SCM | |
1243 | gdbscm_value_lazy_p (SCM self) | |
1244 | { | |
1245 | value_smob *v_smob | |
1246 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
1247 | struct value *value = v_smob->value; | |
1248 | ||
1249 | return scm_from_bool (value_lazy (value)); | |
1250 | } | |
1251 | ||
1252 | /* (value-fetch-lazy! <gdb:value>) -> unspecified */ | |
1253 | ||
1254 | static SCM | |
1255 | gdbscm_value_fetch_lazy_x (SCM self) | |
1256 | { | |
1257 | value_smob *v_smob | |
1258 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
1259 | struct value *value = v_smob->value; | |
ed3ef339 | 1260 | |
492d29ea | 1261 | TRY |
ed3ef339 DE |
1262 | { |
1263 | if (value_lazy (value)) | |
1264 | value_fetch_lazy (value); | |
1265 | } | |
492d29ea PA |
1266 | CATCH (except, RETURN_MASK_ALL) |
1267 | { | |
1268 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
1269 | } | |
1270 | END_CATCH | |
ed3ef339 DE |
1271 | |
1272 | return SCM_UNSPECIFIED; | |
1273 | } | |
1274 | ||
1275 | /* (value-print <gdb:value>) -> string */ | |
1276 | ||
1277 | static SCM | |
1278 | gdbscm_value_print (SCM self) | |
1279 | { | |
1280 | value_smob *v_smob | |
1281 | = vlscm_get_value_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME); | |
1282 | struct value *value = v_smob->value; | |
1283 | struct value_print_options opts; | |
1284 | char *s = NULL; | |
1285 | SCM result; | |
ed3ef339 DE |
1286 | |
1287 | get_user_print_options (&opts); | |
1288 | opts.deref_ref = 0; | |
1289 | ||
492d29ea | 1290 | TRY |
ed3ef339 DE |
1291 | { |
1292 | struct ui_file *stb = mem_fileopen (); | |
1293 | struct cleanup *old_chain = make_cleanup_ui_file_delete (stb); | |
1294 | ||
1295 | common_val_print (value, stb, 0, &opts, current_language); | |
1296 | s = ui_file_xstrdup (stb, NULL); | |
1297 | ||
1298 | do_cleanups (old_chain); | |
1299 | } | |
492d29ea PA |
1300 | CATCH (except, RETURN_MASK_ALL) |
1301 | { | |
1302 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
1303 | } | |
1304 | END_CATCH | |
ed3ef339 DE |
1305 | |
1306 | /* Use SCM_FAILED_CONVERSION_QUESTION_MARK to ensure this doesn't | |
1307 | throw an error if the encoding fails. | |
1308 | IWBN to use scm_take_locale_string here, but we'd have to temporarily | |
1309 | override the default port conversion handler because contrary to | |
1310 | documentation it doesn't necessarily free the input string. */ | |
1311 | result = scm_from_stringn (s, strlen (s), host_charset (), | |
1312 | SCM_FAILED_CONVERSION_QUESTION_MARK); | |
1313 | xfree (s); | |
1314 | ||
1315 | return result; | |
1316 | } | |
1317 | \f | |
1318 | /* (parse-and-eval string) -> <gdb:value> | |
1319 | Parse a string and evaluate the string as an expression. */ | |
1320 | ||
1321 | static SCM | |
1322 | gdbscm_parse_and_eval (SCM expr_scm) | |
1323 | { | |
1324 | char *expr_str; | |
1325 | struct value *res_val = NULL; | |
1326 | SCM result; | |
1327 | struct cleanup *cleanups; | |
ed3ef339 DE |
1328 | |
1329 | /* The sequencing here, as everywhere else, is important. | |
1330 | We can't have existing cleanups when a Scheme exception is thrown. */ | |
1331 | ||
1332 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, NULL, "s", | |
1333 | expr_scm, &expr_str); | |
1334 | ||
1335 | cleanups = make_cleanup_value_free_to_mark (value_mark ()); | |
1336 | make_cleanup (xfree, expr_str); | |
1337 | ||
492d29ea | 1338 | TRY |
ed3ef339 DE |
1339 | { |
1340 | res_val = parse_and_eval (expr_str); | |
1341 | } | |
492d29ea PA |
1342 | CATCH (except, RETURN_MASK_ALL) |
1343 | { | |
1344 | GDBSCM_HANDLE_GDB_EXCEPTION_WITH_CLEANUPS (except, cleanups); | |
1345 | } | |
1346 | END_CATCH | |
ed3ef339 DE |
1347 | |
1348 | gdb_assert (res_val != NULL); | |
1349 | result = vlscm_scm_from_value (res_val); | |
1350 | ||
1351 | do_cleanups (cleanups); | |
1352 | ||
1353 | if (gdbscm_is_exception (result)) | |
1354 | gdbscm_throw (result); | |
1355 | ||
1356 | return result; | |
1357 | } | |
1358 | ||
1359 | /* (history-ref integer) -> <gdb:value> | |
1360 | Return the specified value from GDB's value history. */ | |
1361 | ||
1362 | static SCM | |
1363 | gdbscm_history_ref (SCM index) | |
1364 | { | |
1365 | int i; | |
1366 | struct value *res_val = NULL; /* Initialize to appease gcc warning. */ | |
ed3ef339 DE |
1367 | |
1368 | gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, NULL, "i", index, &i); | |
1369 | ||
492d29ea | 1370 | TRY |
ed3ef339 DE |
1371 | { |
1372 | res_val = access_value_history (i); | |
1373 | } | |
492d29ea PA |
1374 | CATCH (except, RETURN_MASK_ALL) |
1375 | { | |
1376 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
1377 | } | |
1378 | END_CATCH | |
ed3ef339 DE |
1379 | |
1380 | return vlscm_scm_from_value (res_val); | |
1381 | } | |
7a5a839f LC |
1382 | |
1383 | /* (history-append! <gdb:value>) -> index | |
1384 | Append VALUE to GDB's value history. Return its index in the history. */ | |
1385 | ||
1386 | static SCM | |
1387 | gdbscm_history_append_x (SCM value) | |
1388 | { | |
1389 | int res_index = -1; | |
1390 | struct value *v; | |
fb934770 | 1391 | value_smob *v_smob; |
7a5a839f | 1392 | |
fb934770 LC |
1393 | v_smob = vlscm_get_value_smob_arg_unsafe (value, SCM_ARG1, FUNC_NAME); |
1394 | v = v_smob->value; | |
7a5a839f | 1395 | |
492d29ea | 1396 | TRY |
7a5a839f LC |
1397 | { |
1398 | res_index = record_latest_value (v); | |
1399 | } | |
492d29ea PA |
1400 | CATCH (except, RETURN_MASK_ALL) |
1401 | { | |
1402 | GDBSCM_HANDLE_GDB_EXCEPTION (except); | |
1403 | } | |
1404 | END_CATCH | |
7a5a839f LC |
1405 | |
1406 | return scm_from_int (res_index); | |
1407 | } | |
ed3ef339 DE |
1408 | \f |
1409 | /* Initialize the Scheme value code. */ | |
1410 | ||
1411 | static const scheme_function value_functions[] = | |
1412 | { | |
72e02483 | 1413 | { "value?", 1, 0, 0, as_a_scm_t_subr (gdbscm_value_p), |
ed3ef339 DE |
1414 | "\ |
1415 | Return #t if the object is a <gdb:value> object." }, | |
1416 | ||
72e02483 | 1417 | { "make-value", 1, 0, 1, as_a_scm_t_subr (gdbscm_make_value), |
ed3ef339 DE |
1418 | "\ |
1419 | Create a <gdb:value> representing object.\n\ | |
1420 | Typically this is used to convert numbers and strings to\n\ | |
1421 | <gdb:value> objects.\n\ | |
1422 | \n\ | |
1423 | Arguments: object [#:type <gdb:type>]" }, | |
1424 | ||
72e02483 PA |
1425 | { "value-optimized-out?", 1, 0, 0, |
1426 | as_a_scm_t_subr (gdbscm_value_optimized_out_p), | |
ed3ef339 DE |
1427 | "\ |
1428 | Return #t if the value has been optimizd out." }, | |
1429 | ||
72e02483 | 1430 | { "value-address", 1, 0, 0, as_a_scm_t_subr (gdbscm_value_address), |
ed3ef339 DE |
1431 | "\ |
1432 | Return the address of the value." }, | |
1433 | ||
72e02483 | 1434 | { "value-type", 1, 0, 0, as_a_scm_t_subr (gdbscm_value_type), |
ed3ef339 DE |
1435 | "\ |
1436 | Return the type of the value." }, | |
1437 | ||
72e02483 | 1438 | { "value-dynamic-type", 1, 0, 0, as_a_scm_t_subr (gdbscm_value_dynamic_type), |
ed3ef339 DE |
1439 | "\ |
1440 | Return the dynamic type of the value." }, | |
1441 | ||
72e02483 | 1442 | { "value-cast", 2, 0, 0, as_a_scm_t_subr (gdbscm_value_cast), |
ed3ef339 DE |
1443 | "\ |
1444 | Cast the value to the supplied type.\n\ | |
1445 | \n\ | |
1446 | Arguments: <gdb:value> <gdb:type>" }, | |
1447 | ||
72e02483 | 1448 | { "value-dynamic-cast", 2, 0, 0, as_a_scm_t_subr (gdbscm_value_dynamic_cast), |
ed3ef339 DE |
1449 | "\ |
1450 | Cast the value to the supplied type, as if by the C++\n\ | |
1451 | dynamic_cast operator.\n\ | |
1452 | \n\ | |
1453 | Arguments: <gdb:value> <gdb:type>" }, | |
1454 | ||
72e02483 PA |
1455 | { "value-reinterpret-cast", 2, 0, 0, |
1456 | as_a_scm_t_subr (gdbscm_value_reinterpret_cast), | |
ed3ef339 DE |
1457 | "\ |
1458 | Cast the value to the supplied type, as if by the C++\n\ | |
1459 | reinterpret_cast operator.\n\ | |
1460 | \n\ | |
1461 | Arguments: <gdb:value> <gdb:type>" }, | |
1462 | ||
72e02483 | 1463 | { "value-dereference", 1, 0, 0, as_a_scm_t_subr (gdbscm_value_dereference), |
ed3ef339 DE |
1464 | "\ |
1465 | Return the result of applying the C unary * operator to the value." }, | |
1466 | ||
72e02483 PA |
1467 | { "value-referenced-value", 1, 0, 0, |
1468 | as_a_scm_t_subr (gdbscm_value_referenced_value), | |
ed3ef339 DE |
1469 | "\ |
1470 | Given a value of a reference type, return the value referenced.\n\ | |
1471 | The difference between this function and value-dereference is that\n\ | |
1472 | the latter applies * unary operator to a value, which need not always\n\ | |
1473 | result in the value referenced.\n\ | |
1474 | For example, for a value which is a reference to an 'int' pointer ('int *'),\n\ | |
1475 | value-dereference will result in a value of type 'int' while\n\ | |
1476 | value-referenced-value will result in a value of type 'int *'." }, | |
1477 | ||
72e02483 | 1478 | { "value-field", 2, 0, 0, as_a_scm_t_subr (gdbscm_value_field), |
ed3ef339 DE |
1479 | "\ |
1480 | Return the specified field of the value.\n\ | |
1481 | \n\ | |
1482 | Arguments: <gdb:value> string" }, | |
1483 | ||
72e02483 | 1484 | { "value-subscript", 2, 0, 0, as_a_scm_t_subr (gdbscm_value_subscript), |
ed3ef339 DE |
1485 | "\ |
1486 | Return the value of the array at the specified index.\n\ | |
1487 | \n\ | |
1488 | Arguments: <gdb:value> integer" }, | |
1489 | ||
72e02483 | 1490 | { "value-call", 2, 0, 0, as_a_scm_t_subr (gdbscm_value_call), |
ed3ef339 DE |
1491 | "\ |
1492 | Perform an inferior function call taking the value as a pointer to the\n\ | |
1493 | function to call.\n\ | |
1494 | Each element of the argument list must be a <gdb:value> object or an object\n\ | |
1495 | that can be converted to one.\n\ | |
1496 | The result is the value returned by the function.\n\ | |
1497 | \n\ | |
1498 | Arguments: <gdb:value> arg-list" }, | |
1499 | ||
72e02483 | 1500 | { "value->bool", 1, 0, 0, as_a_scm_t_subr (gdbscm_value_to_bool), |
ed3ef339 DE |
1501 | "\ |
1502 | Return the Scheme boolean representing the GDB value.\n\ | |
1503 | The value must be \"integer like\". Pointers are ok." }, | |
1504 | ||
72e02483 | 1505 | { "value->integer", 1, 0, 0, as_a_scm_t_subr (gdbscm_value_to_integer), |
ed3ef339 DE |
1506 | "\ |
1507 | Return the Scheme integer representing the GDB value.\n\ | |
1508 | The value must be \"integer like\". Pointers are ok." }, | |
1509 | ||
72e02483 | 1510 | { "value->real", 1, 0, 0, as_a_scm_t_subr (gdbscm_value_to_real), |
ed3ef339 DE |
1511 | "\ |
1512 | Return the Scheme real number representing the GDB value.\n\ | |
1513 | The value must be a number." }, | |
1514 | ||
72e02483 | 1515 | { "value->bytevector", 1, 0, 0, as_a_scm_t_subr (gdbscm_value_to_bytevector), |
ed3ef339 DE |
1516 | "\ |
1517 | Return a Scheme bytevector with the raw contents of the GDB value.\n\ | |
1518 | No transformation, endian or otherwise, is performed." }, | |
1519 | ||
72e02483 | 1520 | { "value->string", 1, 0, 1, as_a_scm_t_subr (gdbscm_value_to_string), |
ed3ef339 DE |
1521 | "\ |
1522 | Return the Unicode string of the value's contents.\n\ | |
1523 | If ENCODING is not given, the string is assumed to be encoded in\n\ | |
1524 | the target's charset.\n\ | |
1525 | An error setting \"error\" causes an exception to be thrown if there's\n\ | |
1526 | a decoding error. An error setting of \"substitute\" causes invalid\n\ | |
1527 | characters to be replaced with \"?\". The default is \"error\".\n\ | |
1528 | If LENGTH is provided, only fetch string to the length provided.\n\ | |
1529 | \n\ | |
1530 | Arguments: <gdb:value>\n\ | |
1531 | [#:encoding encoding] [#:errors \"error\"|\"substitute\"]\n\ | |
1532 | [#:length length]" }, | |
1533 | ||
72e02483 PA |
1534 | { "value->lazy-string", 1, 0, 1, |
1535 | as_a_scm_t_subr (gdbscm_value_to_lazy_string), | |
ed3ef339 DE |
1536 | "\ |
1537 | Return a Scheme object representing a lazily fetched Unicode string\n\ | |
1538 | of the value's contents.\n\ | |
1539 | If ENCODING is not given, the string is assumed to be encoded in\n\ | |
1540 | the target's charset.\n\ | |
1541 | If LENGTH is provided, only fetch string to the length provided.\n\ | |
1542 | \n\ | |
1543 | Arguments: <gdb:value> [#:encoding encoding] [#:length length]" }, | |
1544 | ||
72e02483 | 1545 | { "value-lazy?", 1, 0, 0, as_a_scm_t_subr (gdbscm_value_lazy_p), |
ed3ef339 DE |
1546 | "\ |
1547 | Return #t if the value is lazy (not fetched yet from the inferior).\n\ | |
1548 | A lazy value is fetched when needed, or when the value-fetch-lazy! function\n\ | |
1549 | is called." }, | |
1550 | ||
72e02483 | 1551 | { "make-lazy-value", 2, 0, 0, as_a_scm_t_subr (gdbscm_make_lazy_value), |
ed3ef339 DE |
1552 | "\ |
1553 | Create a <gdb:value> that will be lazily fetched from the target.\n\ | |
1554 | \n\ | |
1555 | Arguments: <gdb:type> address" }, | |
1556 | ||
72e02483 | 1557 | { "value-fetch-lazy!", 1, 0, 0, as_a_scm_t_subr (gdbscm_value_fetch_lazy_x), |
ed3ef339 DE |
1558 | "\ |
1559 | Fetch the value from the inferior, if it was lazy.\n\ | |
1560 | The result is \"unspecified\"." }, | |
1561 | ||
72e02483 | 1562 | { "value-print", 1, 0, 0, as_a_scm_t_subr (gdbscm_value_print), |
ed3ef339 DE |
1563 | "\ |
1564 | Return the string representation (print form) of the value." }, | |
1565 | ||
72e02483 | 1566 | { "parse-and-eval", 1, 0, 0, as_a_scm_t_subr (gdbscm_parse_and_eval), |
ed3ef339 DE |
1567 | "\ |
1568 | Evaluates string in gdb and returns the result as a <gdb:value> object." }, | |
1569 | ||
72e02483 | 1570 | { "history-ref", 1, 0, 0, as_a_scm_t_subr (gdbscm_history_ref), |
ed3ef339 DE |
1571 | "\ |
1572 | Return the specified value from GDB's value history." }, | |
1573 | ||
72e02483 | 1574 | { "history-append!", 1, 0, 0, as_a_scm_t_subr (gdbscm_history_append_x), |
7a5a839f LC |
1575 | "\ |
1576 | Append the specified value onto GDB's value history." }, | |
1577 | ||
ed3ef339 DE |
1578 | END_FUNCTIONS |
1579 | }; | |
1580 | ||
1581 | void | |
1582 | gdbscm_initialize_values (void) | |
1583 | { | |
1584 | value_smob_tag = gdbscm_make_smob_type (value_smob_name, | |
1585 | sizeof (value_smob)); | |
ed3ef339 DE |
1586 | scm_set_smob_free (value_smob_tag, vlscm_free_value_smob); |
1587 | scm_set_smob_print (value_smob_tag, vlscm_print_value_smob); | |
1588 | scm_set_smob_equalp (value_smob_tag, vlscm_equal_p_value_smob); | |
1589 | ||
1590 | gdbscm_define_functions (value_functions, 1); | |
1591 | ||
1592 | type_keyword = scm_from_latin1_keyword ("type"); | |
1593 | encoding_keyword = scm_from_latin1_keyword ("encoding"); | |
1594 | errors_keyword = scm_from_latin1_keyword ("errors"); | |
1595 | length_keyword = scm_from_latin1_keyword ("length"); | |
1596 | ||
1597 | error_symbol = scm_from_latin1_symbol ("error"); | |
1598 | escape_symbol = scm_from_latin1_symbol ("escape"); | |
1599 | substitute_symbol = scm_from_latin1_symbol ("substitute"); | |
1600 | } |