Commit | Line | Data |
---|---|---|
8b93c638 JM |
1 | /* Implementation of the GDB variable objects API. |
2 | Copyright 1999, 2000 Free Software Foundation, Inc. | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify | |
5 | it under the terms of the GNU General Public License as published by | |
6 | the Free Software Foundation; either version 2 of the License, or | |
7 | (at your option) any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; if not, write to the Free Software | |
16 | Foundation, Inc., 59 Temple Place - Suite 330, | |
17 | Boston, MA 02111-1307, USA. */ | |
18 | ||
19 | #include "defs.h" | |
20 | #include "value.h" | |
21 | #include "expression.h" | |
22 | #include "frame.h" | |
23 | #include "valprint.h" | |
24 | #include "language.h" | |
25 | #include "wrapper.h" | |
26 | #include "gdbcmd.h" | |
27 | #include <math.h> | |
28 | ||
29 | #include "varobj.h" | |
30 | ||
31 | /* Non-zero if we want to see trace of varobj level stuff. */ | |
32 | ||
33 | int varobjdebug = 0; | |
34 | ||
35 | /* String representations of gdb's format codes */ | |
36 | char *varobj_format_string[] = | |
37 | {"natural", "binary", "decimal", "hexadecimal", "octal"}; | |
38 | ||
39 | /* String representations of gdb's known languages */ | |
40 | char *varobj_language_string[] = | |
41 | {"unknown", "C", "C++", "Java"}; | |
42 | ||
43 | /* Data structures */ | |
44 | ||
45 | /* Every root variable has one of these structures saved in its | |
46 | varobj. Members which must be free'd are noted. */ | |
47 | struct varobj_root | |
48 | { | |
49 | ||
50 | /* Alloc'd expression for this parent. */ | |
51 | struct expression *exp; | |
52 | ||
53 | /* Block for which this expression is valid */ | |
54 | struct block *valid_block; | |
55 | ||
56 | /* The frame for this expression */ | |
57 | CORE_ADDR frame; | |
58 | ||
73a93a32 JI |
59 | /* If 1, "update" always recomputes the frame & valid block |
60 | using the currently selected frame. */ | |
61 | int use_selected_frame; | |
62 | ||
8b93c638 JM |
63 | /* Language info for this variable and its children */ |
64 | struct language_specific *lang; | |
65 | ||
66 | /* The varobj for this root node. */ | |
67 | struct varobj *rootvar; | |
68 | ||
69 | /* Next root variable */ | |
70 | struct varobj_root *next; | |
71 | }; | |
72 | ||
73 | /* Every variable in the system has a structure of this type defined | |
74 | for it. This structure holds all information necessary to manipulate | |
75 | a particular object variable. Members which must be freed are noted. */ | |
76 | struct varobj | |
77 | { | |
78 | ||
79 | /* Alloc'd name of the variable for this object.. If this variable is a | |
80 | child, then this name will be the child's source name. | |
81 | (bar, not foo.bar) */ | |
82 | /* NOTE: This is the "expression" */ | |
83 | char *name; | |
84 | ||
85 | /* The alloc'd name for this variable's object. This is here for | |
86 | convenience when constructing this object's children. */ | |
87 | char *obj_name; | |
88 | ||
89 | /* Index of this variable in its parent or -1 */ | |
90 | int index; | |
91 | ||
92 | /* The type of this variable. This may NEVER be NULL. */ | |
93 | struct type *type; | |
94 | ||
95 | /* The value of this expression or subexpression. This may be NULL. */ | |
96 | value_ptr value; | |
97 | ||
98 | /* Did an error occur evaluating the expression or getting its value? */ | |
99 | int error; | |
100 | ||
101 | /* The number of (immediate) children this variable has */ | |
102 | int num_children; | |
103 | ||
104 | /* If this object is a child, this points to its immediate parent. */ | |
105 | struct varobj *parent; | |
106 | ||
107 | /* A list of this object's children */ | |
108 | struct varobj_child *children; | |
109 | ||
110 | /* Description of the root variable. Points to root variable for children. */ | |
111 | struct varobj_root *root; | |
112 | ||
113 | /* The format of the output for this object */ | |
114 | enum varobj_display_formats format; | |
115 | }; | |
116 | ||
117 | /* Every variable keeps a linked list of its children, described | |
118 | by the following structure. */ | |
119 | /* FIXME: Deprecated. All should use vlist instead */ | |
120 | ||
121 | struct varobj_child | |
122 | { | |
123 | ||
124 | /* Pointer to the child's data */ | |
125 | struct varobj *child; | |
126 | ||
127 | /* Pointer to the next child */ | |
128 | struct varobj_child *next; | |
129 | }; | |
130 | ||
131 | /* A stack of varobjs */ | |
132 | /* FIXME: Deprecated. All should use vlist instead */ | |
133 | ||
134 | struct vstack | |
135 | { | |
136 | struct varobj *var; | |
137 | struct vstack *next; | |
138 | }; | |
139 | ||
140 | struct cpstack | |
141 | { | |
142 | char *name; | |
143 | struct cpstack *next; | |
144 | }; | |
145 | ||
146 | /* A list of varobjs */ | |
147 | ||
148 | struct vlist | |
149 | { | |
150 | struct varobj *var; | |
151 | struct vlist *next; | |
152 | }; | |
153 | ||
154 | /* Private function prototypes */ | |
155 | ||
156 | /* Helper functions for the above subcommands. */ | |
157 | ||
158 | static int delete_variable PARAMS ((struct cpstack **, struct varobj *, int)); | |
159 | ||
160 | static void delete_variable_1 PARAMS ((struct cpstack **, int *, | |
161 | struct varobj *, int, int)); | |
162 | ||
163 | static int install_variable PARAMS ((struct varobj *)); | |
164 | ||
165 | static void uninstall_variable PARAMS ((struct varobj *)); | |
166 | ||
167 | static struct varobj *child_exists PARAMS ((struct varobj *, char *)); | |
168 | ||
169 | static struct varobj *create_child PARAMS ((struct varobj *, int, char *)); | |
170 | ||
171 | static void save_child_in_parent PARAMS ((struct varobj *, struct varobj *)); | |
172 | ||
173 | static void remove_child_from_parent PARAMS ((struct varobj *, struct varobj *)); | |
174 | ||
175 | /* Utility routines */ | |
176 | ||
177 | static struct varobj *new_variable PARAMS ((void)); | |
178 | ||
179 | static struct varobj *new_root_variable PARAMS ((void)); | |
180 | ||
181 | static void free_variable PARAMS ((struct varobj * var)); | |
182 | ||
183 | static struct type *get_type PARAMS ((struct varobj * var)); | |
184 | ||
185 | static struct type *get_type_deref PARAMS ((struct varobj * var)); | |
186 | ||
187 | static struct type *get_target_type PARAMS ((struct type *)); | |
188 | ||
189 | static enum varobj_display_formats variable_default_display PARAMS ((struct varobj *)); | |
190 | ||
191 | static int my_value_equal PARAMS ((value_ptr, value_ptr, int *)); | |
192 | ||
193 | static void vpush PARAMS ((struct vstack ** pstack, struct varobj * var)); | |
194 | ||
195 | static struct varobj *vpop PARAMS ((struct vstack ** pstack)); | |
196 | ||
197 | static void cppush PARAMS ((struct cpstack ** pstack, char *name)); | |
198 | ||
199 | static char *cppop PARAMS ((struct cpstack ** pstack)); | |
200 | ||
201 | /* Language-specific routines. */ | |
202 | ||
203 | static enum varobj_languages variable_language PARAMS ((struct varobj * var)); | |
204 | ||
205 | static int number_of_children PARAMS ((struct varobj *)); | |
206 | ||
207 | static char *name_of_variable PARAMS ((struct varobj *)); | |
208 | ||
209 | static char *name_of_child PARAMS ((struct varobj *, int)); | |
210 | ||
73a93a32 JI |
211 | static value_ptr value_of_root PARAMS ((struct varobj ** var_handle, |
212 | int *)); | |
8b93c638 JM |
213 | |
214 | static value_ptr value_of_child PARAMS ((struct varobj * parent, int index)); | |
215 | ||
216 | static struct type *type_of_child PARAMS ((struct varobj * var)); | |
217 | ||
218 | static int variable_editable PARAMS ((struct varobj * var)); | |
219 | ||
220 | static char *my_value_of_variable PARAMS ((struct varobj * var)); | |
221 | ||
222 | static int type_changeable PARAMS ((struct varobj * var)); | |
223 | ||
224 | /* C implementation */ | |
225 | ||
226 | static int c_number_of_children PARAMS ((struct varobj * var)); | |
227 | ||
228 | static char *c_name_of_variable PARAMS ((struct varobj * parent)); | |
229 | ||
230 | static char *c_name_of_child PARAMS ((struct varobj * parent, int index)); | |
231 | ||
73a93a32 | 232 | static value_ptr c_value_of_root PARAMS ((struct varobj ** var_handle)); |
8b93c638 JM |
233 | |
234 | static value_ptr c_value_of_child PARAMS ((struct varobj * parent, int index)); | |
235 | ||
236 | static struct type *c_type_of_child PARAMS ((struct varobj * parent, int index)); | |
237 | ||
238 | static int c_variable_editable PARAMS ((struct varobj * var)); | |
239 | ||
240 | static char *c_value_of_variable PARAMS ((struct varobj * var)); | |
241 | ||
242 | /* C++ implementation */ | |
243 | ||
244 | static int cplus_number_of_children PARAMS ((struct varobj * var)); | |
245 | ||
246 | static void cplus_class_num_children PARAMS ((struct type * type, int children[3])); | |
247 | ||
248 | static char *cplus_name_of_variable PARAMS ((struct varobj * parent)); | |
249 | ||
250 | static char *cplus_name_of_child PARAMS ((struct varobj * parent, int index)); | |
251 | ||
73a93a32 | 252 | static value_ptr cplus_value_of_root PARAMS ((struct varobj ** var_handle)); |
8b93c638 JM |
253 | |
254 | static value_ptr cplus_value_of_child PARAMS ((struct varobj * parent, int index)); | |
255 | ||
256 | static struct type *cplus_type_of_child PARAMS ((struct varobj * parent, int index)); | |
257 | ||
258 | static int cplus_variable_editable PARAMS ((struct varobj * var)); | |
259 | ||
260 | static char *cplus_value_of_variable PARAMS ((struct varobj * var)); | |
261 | ||
262 | /* Java implementation */ | |
263 | ||
264 | static int java_number_of_children PARAMS ((struct varobj * var)); | |
265 | ||
266 | static char *java_name_of_variable PARAMS ((struct varobj * parent)); | |
267 | ||
268 | static char *java_name_of_child PARAMS ((struct varobj * parent, int index)); | |
269 | ||
73a93a32 | 270 | static value_ptr java_value_of_root PARAMS ((struct varobj ** var_handle)); |
8b93c638 JM |
271 | |
272 | static value_ptr java_value_of_child PARAMS ((struct varobj * parent, int index)); | |
273 | ||
274 | static struct type *java_type_of_child PARAMS ((struct varobj * parent, int index)); | |
275 | ||
276 | static int java_variable_editable PARAMS ((struct varobj * var)); | |
277 | ||
278 | static char *java_value_of_variable PARAMS ((struct varobj * var)); | |
279 | ||
280 | /* The language specific vector */ | |
281 | ||
282 | struct language_specific | |
283 | { | |
284 | ||
285 | /* The language of this variable */ | |
286 | enum varobj_languages language; | |
287 | ||
288 | /* The number of children of PARENT. */ | |
289 | int (*number_of_children) PARAMS ((struct varobj * parent)); | |
290 | ||
291 | /* The name (expression) of a root varobj. */ | |
292 | char *(*name_of_variable) PARAMS ((struct varobj * parent)); | |
293 | ||
294 | /* The name of the INDEX'th child of PARENT. */ | |
295 | char *(*name_of_child) PARAMS ((struct varobj * parent, int index)); | |
296 | ||
297 | /* The value_ptr of the root variable ROOT. */ | |
73a93a32 | 298 | value_ptr (*value_of_root) PARAMS ((struct varobj ** root_handle)); |
8b93c638 JM |
299 | |
300 | /* The value_ptr of the INDEX'th child of PARENT. */ | |
301 | value_ptr (*value_of_child) PARAMS ((struct varobj * parent, int index)); | |
302 | ||
303 | /* The type of the INDEX'th child of PARENT. */ | |
304 | struct type *(*type_of_child) PARAMS ((struct varobj * parent, int index)); | |
305 | ||
306 | /* Is VAR editable? */ | |
307 | int (*variable_editable) PARAMS ((struct varobj * var)); | |
308 | ||
309 | /* The current value of VAR. */ | |
310 | char *(*value_of_variable) PARAMS ((struct varobj * var)); | |
311 | }; | |
312 | ||
313 | /* Array of known source language routines. */ | |
314 | static struct language_specific | |
315 | languages[vlang_end][sizeof (struct language_specific)] = | |
316 | { | |
317 | /* Unknown (try treating as C */ | |
318 | { | |
319 | vlang_unknown, | |
320 | c_number_of_children, | |
321 | c_name_of_variable, | |
322 | c_name_of_child, | |
323 | c_value_of_root, | |
324 | c_value_of_child, | |
325 | c_type_of_child, | |
326 | c_variable_editable, | |
327 | c_value_of_variable | |
328 | } | |
329 | , | |
330 | /* C */ | |
331 | { | |
332 | vlang_c, | |
333 | c_number_of_children, | |
334 | c_name_of_variable, | |
335 | c_name_of_child, | |
336 | c_value_of_root, | |
337 | c_value_of_child, | |
338 | c_type_of_child, | |
339 | c_variable_editable, | |
340 | c_value_of_variable | |
341 | } | |
342 | , | |
343 | /* C++ */ | |
344 | { | |
345 | vlang_cplus, | |
346 | cplus_number_of_children, | |
347 | cplus_name_of_variable, | |
348 | cplus_name_of_child, | |
349 | cplus_value_of_root, | |
350 | cplus_value_of_child, | |
351 | cplus_type_of_child, | |
352 | cplus_variable_editable, | |
353 | cplus_value_of_variable | |
354 | } | |
355 | , | |
356 | /* Java */ | |
357 | { | |
358 | vlang_java, | |
359 | java_number_of_children, | |
360 | java_name_of_variable, | |
361 | java_name_of_child, | |
362 | java_value_of_root, | |
363 | java_value_of_child, | |
364 | java_type_of_child, | |
365 | java_variable_editable, | |
366 | java_value_of_variable | |
367 | } | |
368 | }; | |
369 | ||
370 | /* A little convenience enum for dealing with C++/Java */ | |
371 | enum vsections | |
372 | { | |
373 | v_public = 0, v_private, v_protected | |
374 | }; | |
375 | ||
376 | /* Private data */ | |
377 | ||
378 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
379 | static int format_code[] = | |
380 | {0, 't', 'd', 'x', 'o'}; | |
381 | ||
382 | /* Header of the list of root variable objects */ | |
383 | static struct varobj_root *rootlist; | |
384 | static int rootcount = 0; /* number of root varobjs in the list */ | |
385 | ||
386 | /* Prime number indicating the number of buckets in the hash table */ | |
387 | /* A prime large enough to avoid too many colisions */ | |
388 | #define VAROBJ_TABLE_SIZE 227 | |
389 | ||
390 | /* Pointer to the varobj hash table (built at run time) */ | |
391 | static struct vlist **varobj_table; | |
392 | ||
393 | #if defined(FREEIF) | |
394 | #undef FREEIF | |
395 | #endif | |
396 | #define FREEIF(x) if (x != NULL) free((char *) (x)) | |
397 | ||
398 | /* Is the variable X one of our "fake" children? */ | |
399 | #define CPLUS_FAKE_CHILD(x) \ | |
400 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
401 | \f | |
402 | ||
403 | /* API Implementation */ | |
404 | ||
405 | /* Creates a varobj (not its children) */ | |
406 | ||
407 | struct varobj * | |
408 | varobj_create (char *objname, | |
73a93a32 JI |
409 | char *expression, CORE_ADDR frame, |
410 | enum varobj_type type) | |
8b93c638 JM |
411 | { |
412 | struct varobj *var; | |
413 | struct frame_info *fi, *old_fi; | |
414 | struct block *block; | |
415 | struct cleanup *old_chain; | |
416 | ||
417 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
418 | var = new_root_variable (); | |
419 | old_chain = make_cleanup ((make_cleanup_func) free_variable, var); | |
420 | ||
421 | if (expression != NULL) | |
422 | { | |
423 | char *p; | |
424 | enum varobj_languages lang; | |
425 | ||
426 | /* Parse and evaluate the expression, filling in as much | |
427 | of the variable's data as possible */ | |
428 | ||
429 | /* Allow creator to specify context of variable */ | |
73a93a32 JI |
430 | if ((type == USE_CURRENT_FRAME) |
431 | || (type == USE_SELECTED_FRAME)) | |
8b93c638 JM |
432 | fi = selected_frame; |
433 | else | |
434 | fi = find_frame_addr_in_frame_chain (frame); | |
435 | ||
73a93a32 JI |
436 | /* frame = -2 means always use selected frame */ |
437 | if (type == USE_SELECTED_FRAME) | |
438 | var->root->use_selected_frame = 1; | |
439 | ||
8b93c638 JM |
440 | block = NULL; |
441 | if (fi != NULL) | |
442 | block = get_frame_block (fi); | |
443 | ||
444 | p = expression; | |
445 | innermost_block = NULL; | |
73a93a32 JI |
446 | /* Wrap the call to parse expression, so we can |
447 | return a sensible error. */ | |
448 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
449 | { | |
450 | return NULL; | |
451 | } | |
8b93c638 JM |
452 | |
453 | /* Don't allow variables to be created for types. */ | |
454 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
455 | { | |
456 | do_cleanups (old_chain); | |
457 | fprintf_unfiltered (gdb_stderr, | |
458 | "Attempt to use a type name as an expression."); | |
459 | return NULL; | |
460 | } | |
461 | ||
462 | var->format = variable_default_display (var); | |
463 | var->root->valid_block = innermost_block; | |
464 | var->name = savestring (expression, strlen (expression)); | |
465 | ||
466 | /* When the frame is different from the current frame, | |
467 | we must select the appropriate frame before parsing | |
468 | the expression, otherwise the value will not be current. | |
469 | Since select_frame is so benign, just call it for all cases. */ | |
470 | if (fi != NULL) | |
471 | { | |
472 | var->root->frame = FRAME_FP (fi); | |
473 | old_fi = selected_frame; | |
474 | select_frame (fi, -1); | |
475 | } | |
476 | ||
477 | /* We definitively need to catch errors here. | |
478 | If evaluate_expression succeeds we got the value we wanted. | |
479 | But if it fails, we still go on with a call to evaluate_type() */ | |
480 | if (gdb_evaluate_expression (var->root->exp, &var->value)) | |
481 | { | |
482 | /* no error */ | |
483 | release_value (var->value); | |
484 | if (VALUE_LAZY (var->value)) | |
485 | gdb_value_fetch_lazy (var->value); | |
486 | } | |
487 | else | |
488 | var->value = evaluate_type (var->root->exp); | |
489 | ||
490 | var->type = VALUE_TYPE (var->value); | |
491 | ||
492 | /* Set language info */ | |
493 | lang = variable_language (var); | |
494 | var->root->lang = languages[lang]; | |
495 | ||
496 | /* Set ourselves as our root */ | |
497 | var->root->rootvar = var; | |
498 | ||
499 | /* Reset the selected frame */ | |
500 | if (fi != NULL) | |
501 | select_frame (old_fi, -1); | |
502 | } | |
503 | ||
73a93a32 JI |
504 | /* If the variable object name is null, that means this |
505 | is a temporary variable, so don't install it. */ | |
506 | ||
507 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 JM |
508 | { |
509 | var->obj_name = savestring (objname, strlen (objname)); | |
510 | ||
511 | /* If a varobj name is duplicated, the install will fail so | |
512 | we must clenup */ | |
513 | if (!install_variable (var)) | |
514 | { | |
515 | do_cleanups (old_chain); | |
516 | return NULL; | |
517 | } | |
518 | } | |
519 | ||
520 | discard_cleanups (old_chain); | |
521 | return var; | |
522 | } | |
523 | ||
524 | /* Generates an unique name that can be used for a varobj */ | |
525 | ||
526 | char * | |
527 | varobj_gen_name (void) | |
528 | { | |
529 | static int id = 0; | |
530 | char obj_name[31]; | |
531 | ||
532 | /* generate a name for this object */ | |
533 | id++; | |
534 | sprintf (obj_name, "var%d", id); | |
535 | ||
536 | return xstrdup (obj_name); | |
537 | } | |
538 | ||
539 | /* Given an "objname", returns the pointer to the corresponding varobj | |
540 | or NULL if not found */ | |
541 | ||
542 | struct varobj * | |
543 | varobj_get_handle (char *objname) | |
544 | { | |
545 | struct vlist *cv; | |
546 | const char *chp; | |
547 | unsigned int index = 0; | |
548 | unsigned int i = 1; | |
549 | ||
550 | for (chp = objname; *chp; chp++) | |
551 | { | |
552 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
553 | } | |
554 | ||
555 | cv = *(varobj_table + index); | |
556 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
557 | cv = cv->next; | |
558 | ||
559 | if (cv == NULL) | |
560 | error ("Variable object not found"); | |
561 | ||
562 | return cv->var; | |
563 | } | |
564 | ||
565 | /* Given the handle, return the name of the object */ | |
566 | ||
567 | char * | |
568 | varobj_get_objname (struct varobj *var) | |
569 | { | |
570 | return var->obj_name; | |
571 | } | |
572 | ||
573 | /* Given the handle, return the expression represented by the object */ | |
574 | ||
575 | char * | |
576 | varobj_get_expression (struct varobj *var) | |
577 | { | |
578 | return name_of_variable (var); | |
579 | } | |
580 | ||
581 | /* Deletes a varobj and all its children if only_children == 0, | |
582 | otherwise deletes only the children; returns a malloc'ed list of all the | |
583 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
584 | ||
585 | int | |
586 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
587 | { | |
588 | int delcount; | |
589 | int mycount; | |
590 | struct cpstack *result = NULL; | |
591 | char **cp; | |
592 | ||
593 | /* Initialize a stack for temporary results */ | |
594 | cppush (&result, NULL); | |
595 | ||
596 | if (only_children) | |
597 | /* Delete only the variable children */ | |
598 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
599 | else | |
600 | /* Delete the variable and all its children */ | |
601 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
602 | ||
603 | /* We may have been asked to return a list of what has been deleted */ | |
604 | if (dellist != NULL) | |
605 | { | |
606 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
607 | ||
608 | cp = *dellist; | |
609 | mycount = delcount; | |
610 | *cp = cppop (&result); | |
611 | while ((*cp != NULL) && (mycount > 0)) | |
612 | { | |
613 | mycount--; | |
614 | cp++; | |
615 | *cp = cppop (&result); | |
616 | } | |
617 | ||
618 | if (mycount || (*cp != NULL)) | |
619 | warning ("varobj_delete: assertion failed - mycount(=%d) <> 0", mycount); | |
620 | } | |
621 | ||
622 | return delcount; | |
623 | } | |
624 | ||
625 | /* Set/Get variable object display format */ | |
626 | ||
627 | enum varobj_display_formats | |
628 | varobj_set_display_format (struct varobj *var, | |
629 | enum varobj_display_formats format) | |
630 | { | |
631 | switch (format) | |
632 | { | |
633 | case FORMAT_NATURAL: | |
634 | case FORMAT_BINARY: | |
635 | case FORMAT_DECIMAL: | |
636 | case FORMAT_HEXADECIMAL: | |
637 | case FORMAT_OCTAL: | |
638 | var->format = format; | |
639 | break; | |
640 | ||
641 | default: | |
642 | var->format = variable_default_display (var); | |
643 | } | |
644 | ||
645 | return var->format; | |
646 | } | |
647 | ||
648 | enum varobj_display_formats | |
649 | varobj_get_display_format (struct varobj *var) | |
650 | { | |
651 | return var->format; | |
652 | } | |
653 | ||
654 | int | |
655 | varobj_get_num_children (struct varobj *var) | |
656 | { | |
657 | if (var->num_children == -1) | |
658 | var->num_children = number_of_children (var); | |
659 | ||
660 | return var->num_children; | |
661 | } | |
662 | ||
663 | /* Creates a list of the immediate children of a variable object; | |
664 | the return code is the number of such children or -1 on error */ | |
665 | ||
666 | int | |
667 | varobj_list_children (struct varobj *var, struct varobj ***childlist) | |
668 | { | |
669 | struct varobj *child; | |
670 | char *name; | |
671 | int i; | |
672 | ||
673 | /* sanity check: have we been passed a pointer? */ | |
674 | if (childlist == NULL) | |
675 | return -1; | |
676 | ||
677 | *childlist = NULL; | |
678 | ||
679 | if (var->num_children == -1) | |
680 | var->num_children = number_of_children (var); | |
681 | ||
682 | /* List of children */ | |
683 | *childlist = xmalloc ((var->num_children + 1) * sizeof (struct varobj *)); | |
684 | ||
685 | for (i = 0; i < var->num_children; i++) | |
686 | { | |
687 | /* Mark as the end in case we bail out */ | |
688 | *((*childlist) + i) = NULL; | |
689 | ||
690 | /* check if child exists, if not create */ | |
691 | name = name_of_child (var, i); | |
692 | child = child_exists (var, name); | |
693 | if (child == NULL) | |
694 | child = create_child (var, i, name); | |
695 | ||
696 | *((*childlist) + i) = child; | |
697 | } | |
698 | ||
699 | /* End of list is marked by a NULL pointer */ | |
700 | *((*childlist) + i) = NULL; | |
701 | ||
702 | return var->num_children; | |
703 | } | |
704 | ||
705 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
706 | prints on the console */ | |
707 | ||
708 | char * | |
709 | varobj_get_type (struct varobj *var) | |
710 | { | |
711 | value_ptr val; | |
712 | struct cleanup *old_chain; | |
713 | struct ui_file *stb; | |
714 | char *thetype; | |
715 | long length; | |
716 | ||
717 | /* For the "fake" variables, do not return a type. (It's type is | |
718 | NULL, too.) */ | |
719 | if (CPLUS_FAKE_CHILD (var)) | |
720 | return NULL; | |
721 | ||
722 | stb = mem_fileopen (); | |
723 | old_chain = make_cleanup_ui_file_delete (stb); | |
724 | ||
725 | /* To print the type, we simply create a zero value_ptr and | |
726 | cast it to our type. We then typeprint this variable. */ | |
727 | val = value_zero (var->type, not_lval); | |
728 | type_print (VALUE_TYPE (val), "", stb, -1); | |
729 | ||
730 | thetype = ui_file_xstrdup (stb, &length); | |
731 | do_cleanups (old_chain); | |
732 | return thetype; | |
733 | } | |
734 | ||
735 | enum varobj_languages | |
736 | varobj_get_language (struct varobj *var) | |
737 | { | |
738 | return variable_language (var); | |
739 | } | |
740 | ||
741 | int | |
742 | varobj_get_attributes (struct varobj *var) | |
743 | { | |
744 | int attributes = 0; | |
745 | ||
746 | if (variable_editable (var)) | |
747 | /* FIXME: define masks for attributes */ | |
748 | attributes |= 0x00000001; /* Editable */ | |
749 | ||
750 | return attributes; | |
751 | } | |
752 | ||
753 | char * | |
754 | varobj_get_value (struct varobj *var) | |
755 | { | |
756 | return my_value_of_variable (var); | |
757 | } | |
758 | ||
759 | /* Set the value of an object variable (if it is editable) to the | |
760 | value of the given expression */ | |
761 | /* Note: Invokes functions that can call error() */ | |
762 | ||
763 | int | |
764 | varobj_set_value (struct varobj *var, char *expression) | |
765 | { | |
766 | value_ptr val; | |
767 | int offset = 0; | |
768 | ||
769 | /* The argument "expression" contains the variable's new value. | |
770 | We need to first construct a legal expression for this -- ugh! */ | |
771 | /* Does this cover all the bases? */ | |
772 | struct expression *exp; | |
773 | value_ptr value; | |
774 | int saved_input_radix = input_radix; | |
775 | ||
776 | if (variable_editable (var) && !var->error) | |
777 | { | |
778 | char *s = expression; | |
779 | int i; | |
780 | value_ptr temp; | |
781 | ||
782 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ | |
783 | /* FIXME: Callee may longjump */ | |
784 | exp = parse_exp_1 (&s, 0, 0); | |
785 | if (!gdb_evaluate_expression (exp, &value)) | |
786 | { | |
787 | /* We cannot proceed without a valid expression. */ | |
788 | FREEIF (exp); | |
789 | return 0; | |
790 | } | |
791 | ||
792 | /* If our parent is "public", "private", or "protected", we could | |
793 | be asking to modify the value of a baseclass. If so, we need to | |
794 | adjust our address by the offset of our baseclass in the subclass, | |
795 | since VALUE_ADDRESS (var->value) points at the start of the subclass. | |
796 | For some reason, value_cast doesn't take care of this properly. */ | |
797 | temp = var->value; | |
798 | if (var->parent != NULL && CPLUS_FAKE_CHILD (var->parent)) | |
799 | { | |
800 | struct varobj *super, *sub; | |
801 | struct type *type; | |
802 | super = var->parent->parent; | |
803 | sub = super->parent; | |
804 | if (sub != NULL) | |
805 | { | |
806 | /* Yes, it is a baseclass */ | |
807 | type = get_type_deref (sub); | |
808 | ||
809 | if (super->index < TYPE_N_BASECLASSES (type)) | |
810 | { | |
811 | temp = value_copy (var->value); | |
812 | for (i = 0; i < super->index; i++) | |
813 | offset += TYPE_LENGTH (TYPE_FIELD_TYPE (type, i)); | |
814 | } | |
815 | } | |
816 | } | |
817 | ||
818 | VALUE_ADDRESS (temp) += offset; | |
819 | val = value_assign (temp, value); | |
820 | VALUE_ADDRESS (val) -= offset; | |
821 | value_free (var->value); | |
822 | release_value (val); | |
823 | var->value = val; | |
824 | input_radix = saved_input_radix; | |
825 | return 1; | |
826 | } | |
827 | ||
828 | return 0; | |
829 | } | |
830 | ||
831 | /* Returns a malloc'ed list with all root variable objects */ | |
832 | int | |
833 | varobj_list (struct varobj ***varlist) | |
834 | { | |
835 | struct varobj **cv; | |
836 | struct varobj_root *croot; | |
837 | int mycount = rootcount; | |
838 | ||
839 | /* Alloc (rootcount + 1) entries for the result */ | |
840 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
841 | ||
842 | cv = *varlist; | |
843 | croot = rootlist; | |
844 | while ((croot != NULL) && (mycount > 0)) | |
845 | { | |
846 | *cv = croot->rootvar; | |
847 | mycount--; | |
848 | cv++; | |
849 | croot = croot->next; | |
850 | } | |
851 | /* Mark the end of the list */ | |
852 | *cv = NULL; | |
853 | ||
854 | if (mycount || (croot != NULL)) | |
855 | warning ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
856 | rootcount, mycount); | |
857 | ||
858 | return rootcount; | |
859 | } | |
860 | ||
861 | /* Update the values for a variable and its children. This is a | |
862 | two-pronged attack. First, re-parse the value for the root's | |
863 | expression to see if it's changed. Then go all the way | |
864 | through its children, reconstructing them and noting if they've | |
865 | changed. | |
73a93a32 JI |
866 | Return value: |
867 | -1 if there was an error updating the varobj | |
868 | -2 if the type changed | |
869 | Otherwise it is the number of children + parent changed | |
8b93c638 JM |
870 | |
871 | Only root variables can be updated... */ | |
872 | ||
873 | int | |
874 | varobj_update (struct varobj *var, struct varobj ***changelist) | |
875 | { | |
876 | int changed = 0; | |
73a93a32 | 877 | int type_changed; |
8b93c638 JM |
878 | int i; |
879 | int vleft; | |
880 | int error2; | |
881 | struct varobj *v; | |
882 | struct varobj **cv; | |
883 | struct varobj **templist; | |
884 | value_ptr new; | |
885 | struct vstack *stack = NULL; | |
886 | struct vstack *result = NULL; | |
887 | struct frame_info *old_fi; | |
888 | ||
889 | /* sanity check: have we been passed a pointer? */ | |
890 | if (changelist == NULL) | |
891 | return -1; | |
892 | ||
893 | /* Only root variables can be updated... */ | |
894 | if (var->root->rootvar != var) | |
895 | /* Not a root var */ | |
896 | return -1; | |
897 | ||
898 | /* Save the selected stack frame, since we will need to change it | |
899 | in order to evaluate expressions. */ | |
900 | old_fi = selected_frame; | |
901 | ||
902 | /* Update the root variable. value_of_root can return NULL | |
903 | if the variable is no longer around, i.e. we stepped out of | |
73a93a32 JI |
904 | the frame in which a local existed. We are letting the |
905 | value_of_root variable dispose of the varobj if the type | |
906 | has changed. */ | |
907 | type_changed = 1; | |
908 | new = value_of_root (&var, &type_changed); | |
8b93c638 | 909 | if (new == NULL) |
73a93a32 JI |
910 | { |
911 | var->error = 1; | |
912 | return -1; | |
913 | } | |
8b93c638 JM |
914 | |
915 | /* Initialize a stack for temporary results */ | |
916 | vpush (&result, NULL); | |
917 | ||
73a93a32 | 918 | if (type_changed || !my_value_equal (var->value, new, &error2)) |
8b93c638 JM |
919 | { |
920 | /* Note that it's changed There a couple of exceptions here, | |
73a93a32 JI |
921 | though. We don't want some types to be reported as |
922 | "changed". The exception to this is if this is a | |
923 | "use_selected_frame" varobj, and its type has changed. */ | |
924 | if (type_changed || type_changeable (var)) | |
8b93c638 JM |
925 | { |
926 | vpush (&result, var); | |
927 | changed++; | |
928 | } | |
929 | } | |
930 | /* error2 replaces var->error since this new value | |
931 | WILL replace the old one. */ | |
932 | var->error = error2; | |
933 | ||
934 | /* We must always keep around the new value for this root | |
935 | variable expression, or we lose the updated children! */ | |
936 | value_free (var->value); | |
937 | var->value = new; | |
938 | ||
939 | /* Initialize a stack */ | |
940 | vpush (&stack, NULL); | |
941 | ||
942 | /* Push the root's children */ | |
943 | if (var->children != NULL) | |
944 | { | |
945 | struct varobj_child *c; | |
946 | for (c = var->children; c != NULL; c = c->next) | |
947 | vpush (&stack, c->child); | |
948 | } | |
949 | ||
950 | /* Walk through the children, reconstructing them all. */ | |
951 | v = vpop (&stack); | |
952 | while (v != NULL) | |
953 | { | |
954 | /* Push any children */ | |
955 | if (v->children != NULL) | |
956 | { | |
957 | struct varobj_child *c; | |
958 | for (c = v->children; c != NULL; c = c->next) | |
959 | vpush (&stack, c->child); | |
960 | } | |
961 | ||
962 | /* Update this variable */ | |
963 | new = value_of_child (v->parent, v->index); | |
964 | if (type_changeable (v) && !my_value_equal (v->value, new, &error2)) | |
965 | { | |
966 | /* Note that it's changed */ | |
967 | vpush (&result, v); | |
968 | changed++; | |
969 | } | |
970 | /* error2 replaces v->error since this new value | |
971 | WILL replace the old one. */ | |
972 | v->error = error2; | |
973 | ||
974 | /* We must always keep new values, since children depend on it. */ | |
975 | if (v->value != NULL) | |
976 | value_free (v->value); | |
977 | v->value = new; | |
978 | ||
979 | /* Get next child */ | |
980 | v = vpop (&stack); | |
981 | } | |
982 | ||
983 | /* Alloc (changed + 1) list entries */ | |
984 | /* FIXME: add a cleanup for the allocated list(s) | |
985 | because one day the select_frame called below can longjump */ | |
986 | *changelist = xmalloc ((changed + 1) * sizeof (struct varobj *)); | |
987 | if (changed > 1) | |
988 | { | |
989 | templist = xmalloc ((changed + 1) * sizeof (struct varobj *)); | |
990 | cv = templist; | |
991 | } | |
992 | else | |
993 | cv = *changelist; | |
994 | ||
995 | /* Copy from result stack to list */ | |
996 | vleft = changed; | |
997 | *cv = vpop (&result); | |
998 | while ((*cv != NULL) && (vleft > 0)) | |
999 | { | |
1000 | vleft--; | |
1001 | cv++; | |
1002 | *cv = vpop (&result); | |
1003 | } | |
1004 | if (vleft) | |
1005 | warning ("varobj_update: assertion failed - vleft <> 0"); | |
1006 | ||
1007 | if (changed > 1) | |
1008 | { | |
1009 | /* Now we revert the order. */ | |
1010 | for (i=0; i < changed; i++) | |
1011 | *(*changelist + i) = *(templist + changed -1 - i); | |
1012 | *(*changelist + changed) = NULL; | |
1013 | } | |
1014 | ||
1015 | /* Restore selected frame */ | |
1016 | select_frame (old_fi, -1); | |
1017 | ||
73a93a32 JI |
1018 | if (type_changed) |
1019 | return -2; | |
1020 | else | |
1021 | return changed; | |
8b93c638 JM |
1022 | } |
1023 | \f | |
1024 | ||
1025 | /* Helper functions */ | |
1026 | ||
1027 | /* | |
1028 | * Variable object construction/destruction | |
1029 | */ | |
1030 | ||
1031 | static int | |
1032 | delete_variable (resultp, var, only_children_p) | |
1033 | struct cpstack **resultp; | |
1034 | struct varobj *var; | |
1035 | int only_children_p; | |
1036 | { | |
1037 | int delcount = 0; | |
1038 | ||
1039 | delete_variable_1 (resultp, &delcount, var, | |
1040 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1041 | ||
1042 | return delcount; | |
1043 | } | |
1044 | ||
1045 | /* Delete the variable object VAR and its children */ | |
1046 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1047 | and the parent is not removed we dump core. It must be always | |
1048 | initially called with remove_from_parent_p set */ | |
1049 | static void | |
1050 | delete_variable_1 (resultp, delcountp, var, | |
1051 | only_children_p, remove_from_parent_p) | |
1052 | struct cpstack **resultp; | |
1053 | int *delcountp; | |
1054 | struct varobj *var; | |
1055 | int only_children_p; | |
1056 | int remove_from_parent_p; | |
1057 | { | |
1058 | struct varobj_child *vc; | |
1059 | struct varobj_child *next; | |
1060 | ||
1061 | /* Delete any children of this variable, too. */ | |
1062 | for (vc = var->children; vc != NULL; vc = next) | |
1063 | { | |
1064 | if (!remove_from_parent_p) | |
1065 | vc->child->parent = NULL; | |
1066 | delete_variable_1 (resultp, delcountp, vc->child, 0, only_children_p); | |
1067 | next = vc->next; | |
1068 | free (vc); | |
1069 | } | |
1070 | ||
1071 | /* if we were called to delete only the children we are done here */ | |
1072 | if (only_children_p) | |
1073 | return; | |
1074 | ||
1075 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1076 | /* If the name is null, this is a temporary variable, that has not |
1077 | yet been installed, don't report it, it belongs to the caller... */ | |
1078 | if (var->obj_name != NULL) | |
8b93c638 JM |
1079 | { |
1080 | cppush (resultp, strdup (var->obj_name)); | |
1081 | *delcountp = *delcountp + 1; | |
1082 | } | |
1083 | ||
1084 | /* If this variable has a parent, remove it from its parent's list */ | |
1085 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1086 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1087 | expensive list search to find the element to remove when we are | |
1088 | discarding the list afterwards */ | |
1089 | if ((remove_from_parent_p) && | |
1090 | (var->parent != NULL)) | |
1091 | { | |
1092 | remove_child_from_parent (var->parent, var); | |
1093 | } | |
73a93a32 JI |
1094 | |
1095 | if (var->obj_name != NULL) | |
1096 | uninstall_variable (var); | |
8b93c638 JM |
1097 | |
1098 | /* Free memory associated with this variable */ | |
1099 | free_variable (var); | |
1100 | } | |
1101 | ||
1102 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1103 | static int | |
1104 | install_variable (var) | |
1105 | struct varobj *var; | |
1106 | { | |
1107 | struct vlist *cv; | |
1108 | struct vlist *newvl; | |
1109 | const char *chp; | |
1110 | unsigned int index = 0; | |
1111 | unsigned int i = 1; | |
1112 | ||
1113 | for (chp = var->obj_name; *chp; chp++) | |
1114 | { | |
1115 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1116 | } | |
1117 | ||
1118 | cv = *(varobj_table + index); | |
1119 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1120 | cv = cv->next; | |
1121 | ||
1122 | if (cv != NULL) | |
1123 | error ("Duplicate variable object name"); | |
1124 | ||
1125 | /* Add varobj to hash table */ | |
1126 | newvl = xmalloc (sizeof (struct vlist)); | |
1127 | newvl->next = *(varobj_table + index); | |
1128 | newvl->var = var; | |
1129 | *(varobj_table + index) = newvl; | |
1130 | ||
1131 | /* If root, add varobj to root list */ | |
1132 | if (var->root->rootvar == var) | |
1133 | { | |
1134 | /* Add to list of root variables */ | |
1135 | if (rootlist == NULL) | |
1136 | var->root->next = NULL; | |
1137 | else | |
1138 | var->root->next = rootlist; | |
1139 | rootlist = var->root; | |
1140 | rootcount++; | |
1141 | } | |
1142 | ||
1143 | return 1; /* OK */ | |
1144 | } | |
1145 | ||
1146 | /* Unistall the object VAR. */ | |
1147 | static void | |
1148 | uninstall_variable (var) | |
1149 | struct varobj *var; | |
1150 | { | |
1151 | struct vlist *cv; | |
1152 | struct vlist *prev; | |
1153 | struct varobj_root *cr; | |
1154 | struct varobj_root *prer; | |
1155 | const char *chp; | |
1156 | unsigned int index = 0; | |
1157 | unsigned int i = 1; | |
1158 | ||
1159 | /* Remove varobj from hash table */ | |
1160 | for (chp = var->obj_name; *chp; chp++) | |
1161 | { | |
1162 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1163 | } | |
1164 | ||
1165 | cv = *(varobj_table + index); | |
1166 | prev = NULL; | |
1167 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1168 | { | |
1169 | prev = cv; | |
1170 | cv = cv->next; | |
1171 | } | |
1172 | ||
1173 | if (varobjdebug) | |
1174 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1175 | ||
1176 | if (cv == NULL) | |
1177 | { | |
1178 | warning ("Assertion failed: Could not find variable object \"%s\" to delete", var->obj_name); | |
1179 | return; | |
1180 | } | |
1181 | ||
1182 | if (prev == NULL) | |
1183 | *(varobj_table + index) = cv->next; | |
1184 | else | |
1185 | prev->next = cv->next; | |
1186 | ||
1187 | free (cv); | |
1188 | ||
1189 | /* If root, remove varobj from root list */ | |
1190 | if (var->root->rootvar == var) | |
1191 | { | |
1192 | /* Remove from list of root variables */ | |
1193 | if (rootlist == var->root) | |
1194 | rootlist = var->root->next; | |
1195 | else | |
1196 | { | |
1197 | prer = NULL; | |
1198 | cr = rootlist; | |
1199 | while ((cr != NULL) && (cr->rootvar != var)) | |
1200 | { | |
1201 | prer = cr; | |
1202 | cr = cr->next; | |
1203 | } | |
1204 | if (cr == NULL) | |
1205 | { | |
1206 | warning ("Assertion failed: Could not find varobj \"%s\" in root list", var->obj_name); | |
1207 | return; | |
1208 | } | |
1209 | if (prer == NULL) | |
1210 | rootlist = NULL; | |
1211 | else | |
1212 | prer->next = cr->next; | |
1213 | } | |
1214 | rootcount--; | |
1215 | } | |
1216 | ||
1217 | } | |
1218 | ||
1219 | /* Does a child with the name NAME exist in VAR? If so, return its data. | |
1220 | If not, return NULL. */ | |
1221 | static struct varobj * | |
1222 | child_exists (var, name) | |
1223 | struct varobj *var; /* Parent */ | |
1224 | char *name; /* name of child */ | |
1225 | { | |
1226 | struct varobj_child *vc; | |
1227 | ||
1228 | for (vc = var->children; vc != NULL; vc = vc->next) | |
1229 | { | |
1230 | if (STREQ (vc->child->name, name)) | |
1231 | return vc->child; | |
1232 | } | |
1233 | ||
1234 | return NULL; | |
1235 | } | |
1236 | ||
1237 | /* Create and install a child of the parent of the given name */ | |
1238 | static struct varobj * | |
1239 | create_child (parent, index, name) | |
1240 | struct varobj *parent; | |
1241 | int index; | |
1242 | char *name; | |
1243 | { | |
1244 | struct varobj *child; | |
1245 | char *childs_name; | |
1246 | ||
1247 | child = new_variable (); | |
1248 | ||
1249 | /* name is allocated by name_of_child */ | |
1250 | child->name = name; | |
1251 | child->index = index; | |
1252 | child->value = value_of_child (parent, index); | |
1253 | if (child->value == NULL || parent->error) | |
1254 | child->error = 1; | |
1255 | child->parent = parent; | |
1256 | child->root = parent->root; | |
1257 | childs_name = (char *) xmalloc ((strlen (parent->obj_name) + strlen (name) + 2) | |
1258 | * sizeof (char)); | |
1259 | sprintf (childs_name, "%s.%s", parent->obj_name, name); | |
1260 | child->obj_name = childs_name; | |
1261 | install_variable (child); | |
1262 | ||
1263 | /* Save a pointer to this child in the parent */ | |
1264 | save_child_in_parent (parent, child); | |
1265 | ||
1266 | /* Note the type of this child */ | |
1267 | child->type = type_of_child (child); | |
1268 | ||
1269 | return child; | |
1270 | } | |
1271 | ||
1272 | /* FIXME: This should be a generic add to list */ | |
1273 | /* Save CHILD in the PARENT's data. */ | |
1274 | static void | |
1275 | save_child_in_parent (parent, child) | |
1276 | struct varobj *parent; | |
1277 | struct varobj *child; | |
1278 | { | |
1279 | struct varobj_child *vc; | |
1280 | ||
1281 | /* Insert the child at the top */ | |
1282 | vc = parent->children; | |
1283 | parent->children = | |
1284 | (struct varobj_child *) xmalloc (sizeof (struct varobj_child)); | |
1285 | ||
1286 | parent->children->next = vc; | |
1287 | parent->children->child = child; | |
1288 | } | |
1289 | ||
1290 | /* FIXME: This should be a generic remove from list */ | |
1291 | /* Remove the CHILD from the PARENT's list of children. */ | |
1292 | static void | |
1293 | remove_child_from_parent (parent, child) | |
1294 | struct varobj *parent; | |
1295 | struct varobj *child; | |
1296 | { | |
1297 | struct varobj_child *vc, *prev; | |
1298 | ||
1299 | /* Find the child in the parent's list */ | |
1300 | prev = NULL; | |
1301 | for (vc = parent->children; vc != NULL;) | |
1302 | { | |
1303 | if (vc->child == child) | |
1304 | break; | |
1305 | prev = vc; | |
1306 | vc = vc->next; | |
1307 | } | |
1308 | ||
1309 | if (prev == NULL) | |
1310 | parent->children = vc->next; | |
1311 | else | |
1312 | prev->next = vc->next; | |
1313 | ||
1314 | } | |
1315 | \f | |
1316 | ||
1317 | /* | |
1318 | * Miscellaneous utility functions. | |
1319 | */ | |
1320 | ||
1321 | /* Allocate memory and initialize a new variable */ | |
1322 | static struct varobj * | |
1323 | new_variable (void) | |
1324 | { | |
1325 | struct varobj *var; | |
1326 | ||
1327 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1328 | var->name = NULL; | |
1329 | var->obj_name = NULL; | |
1330 | var->index = -1; | |
1331 | var->type = NULL; | |
1332 | var->value = NULL; | |
1333 | var->error = 0; | |
1334 | var->num_children = -1; | |
1335 | var->parent = NULL; | |
1336 | var->children = NULL; | |
1337 | var->format = 0; | |
1338 | var->root = NULL; | |
1339 | ||
1340 | return var; | |
1341 | } | |
1342 | ||
1343 | /* Allocate memory and initialize a new root variable */ | |
1344 | static struct varobj * | |
1345 | new_root_variable (void) | |
1346 | { | |
1347 | struct varobj *var = new_variable (); | |
1348 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1349 | var->root->lang = NULL; | |
1350 | var->root->exp = NULL; | |
1351 | var->root->valid_block = NULL; | |
1352 | var->root->frame = (CORE_ADDR) -1; | |
73a93a32 | 1353 | var->root->use_selected_frame = 0; |
8b93c638 JM |
1354 | var->root->rootvar = NULL; |
1355 | ||
1356 | return var; | |
1357 | } | |
1358 | ||
1359 | /* Free any allocated memory associated with VAR. */ | |
1360 | static void | |
1361 | free_variable (var) | |
1362 | struct varobj *var; | |
1363 | { | |
1364 | /* Free the expression if this is a root variable. */ | |
1365 | if (var->root->rootvar == var) | |
1366 | { | |
1367 | free_current_contents ((char **) &var->root->exp); | |
1368 | FREEIF (var->root); | |
1369 | } | |
1370 | ||
1371 | FREEIF (var->name); | |
1372 | FREEIF (var->obj_name); | |
1373 | FREEIF (var); | |
1374 | } | |
1375 | ||
1376 | /* This returns the type of the variable. This skips past typedefs | |
1377 | and returns the real type of the variable. It also dereferences | |
1378 | pointers and references. */ | |
1379 | static struct type * | |
1380 | get_type (var) | |
1381 | struct varobj *var; | |
1382 | { | |
1383 | struct type *type; | |
1384 | type = var->type; | |
1385 | ||
1386 | while (type != NULL && TYPE_CODE (type) == TYPE_CODE_TYPEDEF) | |
1387 | type = TYPE_TARGET_TYPE (type); | |
1388 | ||
1389 | return type; | |
1390 | } | |
1391 | ||
1392 | /* This returns the type of the variable, dereferencing pointers, too. */ | |
1393 | static struct type * | |
1394 | get_type_deref (var) | |
1395 | struct varobj *var; | |
1396 | { | |
1397 | struct type *type; | |
1398 | ||
1399 | type = get_type (var); | |
1400 | ||
1401 | if (type != NULL && (TYPE_CODE (type) == TYPE_CODE_PTR | |
1402 | || TYPE_CODE (type) == TYPE_CODE_REF)) | |
1403 | type = get_target_type (type); | |
1404 | ||
1405 | return type; | |
1406 | } | |
1407 | ||
1408 | /* This returns the target type (or NULL) of TYPE, also skipping | |
1409 | past typedefs, just like get_type (). */ | |
1410 | static struct type * | |
1411 | get_target_type (type) | |
1412 | struct type *type; | |
1413 | { | |
1414 | if (type != NULL) | |
1415 | { | |
1416 | type = TYPE_TARGET_TYPE (type); | |
1417 | while (type != NULL && TYPE_CODE (type) == TYPE_CODE_TYPEDEF) | |
1418 | type = TYPE_TARGET_TYPE (type); | |
1419 | } | |
1420 | ||
1421 | return type; | |
1422 | } | |
1423 | ||
1424 | /* What is the default display for this variable? We assume that | |
1425 | everything is "natural". Any exceptions? */ | |
1426 | static enum varobj_display_formats | |
1427 | variable_default_display (var) | |
1428 | struct varobj *var; | |
1429 | { | |
1430 | return FORMAT_NATURAL; | |
1431 | } | |
1432 | ||
1433 | /* This function is similar to gdb's value_equal, except that this | |
1434 | one is "safe" -- it NEVER longjmps. It determines if the VAR's | |
1435 | value is the same as VAL2. */ | |
1436 | static int | |
1437 | my_value_equal (val1, val2, error2) | |
1438 | value_ptr val1; | |
1439 | value_ptr val2; | |
1440 | int *error2; | |
1441 | { | |
1442 | int r, err1, err2; | |
1443 | ||
1444 | *error2 = 0; | |
1445 | /* Special case: NULL values. If both are null, say | |
1446 | they're equal. */ | |
1447 | if (val1 == NULL && val2 == NULL) | |
1448 | return 1; | |
1449 | else if (val1 == NULL || val2 == NULL) | |
1450 | return 0; | |
1451 | ||
1452 | /* This is bogus, but unfortunately necessary. We must know | |
1453 | exactly what caused an error -- reading val1 or val2 -- so | |
1454 | that we can really determine if we think that something has changed. */ | |
1455 | err1 = 0; | |
1456 | err2 = 0; | |
1457 | /* We do need to catch errors here because the whole purpose | |
1458 | is to test if value_equal() has errored */ | |
1459 | if (!gdb_value_equal (val1, val1, &r)) | |
1460 | err1 = 1; | |
1461 | ||
1462 | if (!gdb_value_equal (val2, val2, &r)) | |
1463 | *error2 = err2 = 1; | |
1464 | ||
1465 | if (err1 != err2) | |
1466 | return 0; | |
1467 | ||
1468 | if (!gdb_value_equal (val1, val2, &r)) | |
1469 | { | |
1470 | /* An error occurred, this could have happened if | |
1471 | either val1 or val2 errored. ERR1 and ERR2 tell | |
1472 | us which of these it is. If both errored, then | |
1473 | we assume nothing has changed. If one of them is | |
1474 | valid, though, then something has changed. */ | |
1475 | if (err1 == err2) | |
1476 | { | |
1477 | /* both the old and new values caused errors, so | |
1478 | we say the value did not change */ | |
1479 | /* This is indeterminate, though. Perhaps we should | |
1480 | be safe and say, yes, it changed anyway?? */ | |
1481 | return 1; | |
1482 | } | |
1483 | else | |
1484 | { | |
1485 | return 0; | |
1486 | } | |
1487 | } | |
1488 | ||
1489 | return r; | |
1490 | } | |
1491 | ||
1492 | /* FIXME: The following should be generic for any pointer */ | |
1493 | static void | |
1494 | vpush (pstack, var) | |
1495 | struct vstack **pstack; | |
1496 | struct varobj *var; | |
1497 | { | |
1498 | struct vstack *s; | |
1499 | ||
1500 | s = (struct vstack *) xmalloc (sizeof (struct vstack)); | |
1501 | s->var = var; | |
1502 | s->next = *pstack; | |
1503 | *pstack = s; | |
1504 | } | |
1505 | ||
1506 | /* FIXME: The following should be generic for any pointer */ | |
1507 | static struct varobj * | |
1508 | vpop (pstack) | |
1509 | struct vstack **pstack; | |
1510 | { | |
1511 | struct vstack *s; | |
1512 | struct varobj *v; | |
1513 | ||
1514 | if ((*pstack)->var == NULL && (*pstack)->next == NULL) | |
1515 | return NULL; | |
1516 | ||
1517 | s = *pstack; | |
1518 | v = s->var; | |
1519 | *pstack = (*pstack)->next; | |
1520 | free (s); | |
1521 | ||
1522 | return v; | |
1523 | } | |
1524 | ||
1525 | /* FIXME: The following should be generic for any pointer */ | |
1526 | static void | |
1527 | cppush (pstack, name) | |
1528 | struct cpstack **pstack; | |
1529 | char *name; | |
1530 | { | |
1531 | struct cpstack *s; | |
1532 | ||
1533 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1534 | s->name = name; | |
1535 | s->next = *pstack; | |
1536 | *pstack = s; | |
1537 | } | |
1538 | ||
1539 | /* FIXME: The following should be generic for any pointer */ | |
1540 | static char * | |
1541 | cppop (pstack) | |
1542 | struct cpstack **pstack; | |
1543 | { | |
1544 | struct cpstack *s; | |
1545 | char *v; | |
1546 | ||
1547 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1548 | return NULL; | |
1549 | ||
1550 | s = *pstack; | |
1551 | v = s->name; | |
1552 | *pstack = (*pstack)->next; | |
1553 | free (s); | |
1554 | ||
1555 | return v; | |
1556 | } | |
1557 | \f | |
1558 | /* | |
1559 | * Language-dependencies | |
1560 | */ | |
1561 | ||
1562 | /* Common entry points */ | |
1563 | ||
1564 | /* Get the language of variable VAR. */ | |
1565 | static enum varobj_languages | |
1566 | variable_language (var) | |
1567 | struct varobj *var; | |
1568 | { | |
1569 | enum varobj_languages lang; | |
1570 | ||
1571 | switch (var->root->exp->language_defn->la_language) | |
1572 | { | |
1573 | default: | |
1574 | case language_c: | |
1575 | lang = vlang_c; | |
1576 | break; | |
1577 | case language_cplus: | |
1578 | lang = vlang_cplus; | |
1579 | break; | |
1580 | case language_java: | |
1581 | lang = vlang_java; | |
1582 | break; | |
1583 | } | |
1584 | ||
1585 | return lang; | |
1586 | } | |
1587 | ||
1588 | /* Return the number of children for a given variable. | |
1589 | The result of this function is defined by the language | |
1590 | implementation. The number of children returned by this function | |
1591 | is the number of children that the user will see in the variable | |
1592 | display. */ | |
1593 | static int | |
1594 | number_of_children (var) | |
1595 | struct varobj *var; | |
1596 | { | |
1597 | return (*var->root->lang->number_of_children) (var);; | |
1598 | } | |
1599 | ||
1600 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1601 | static char * | |
1602 | name_of_variable (var) | |
1603 | struct varobj *var; | |
1604 | { | |
1605 | return (*var->root->lang->name_of_variable) (var); | |
1606 | } | |
1607 | ||
1608 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1609 | static char * | |
1610 | name_of_child (var, index) | |
1611 | struct varobj *var; | |
1612 | int index; | |
1613 | { | |
1614 | return (*var->root->lang->name_of_child) (var, index); | |
1615 | } | |
1616 | ||
73a93a32 JI |
1617 | /* What is the value_ptr of the root variable VAR? |
1618 | TYPE_CHANGED controls what to do if the type of a | |
1619 | use_selected_frame = 1 variable changes. On input, | |
1620 | TYPE_CHANGED = 1 means discard the old varobj, and replace | |
1621 | it with this one. TYPE_CHANGED = 0 means leave it around. | |
1622 | NB: In both cases, var_handle will point to the new varobj, | |
1623 | so if you use TYPE_CHANGED = 0, you will have to stash the | |
1624 | old varobj pointer away somewhere before calling this. | |
1625 | On return, TYPE_CHANGED will be 1 if the type has changed, and | |
1626 | 0 otherwise. */ | |
8b93c638 | 1627 | static value_ptr |
73a93a32 JI |
1628 | value_of_root (var_handle, type_changed) |
1629 | struct varobj ** var_handle; | |
1630 | int *type_changed; | |
8b93c638 | 1631 | { |
73a93a32 JI |
1632 | struct varobj *var; |
1633 | ||
1634 | if (var_handle == NULL) | |
1635 | return NULL; | |
1636 | ||
1637 | var = *var_handle; | |
1638 | ||
1639 | /* This should really be an exception, since this should | |
1640 | only get called with a root variable. */ | |
1641 | ||
1642 | if (var->root->rootvar != var) | |
1643 | return NULL; | |
1644 | ||
1645 | if (var->root->use_selected_frame) | |
1646 | { | |
1647 | struct varobj *tmp_var; | |
1648 | char *old_type, *new_type; | |
1649 | old_type = varobj_get_type (var); | |
1650 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
1651 | USE_SELECTED_FRAME); | |
1652 | if (tmp_var == NULL) | |
1653 | { | |
1654 | return NULL; | |
1655 | } | |
1656 | new_type = varobj_get_type (tmp_var); | |
1657 | if (strcmp(old_type, new_type) == 0) | |
1658 | { | |
1659 | varobj_delete (tmp_var, NULL, 0); | |
1660 | *type_changed = 0; | |
1661 | } | |
1662 | else | |
1663 | { | |
1664 | if (*type_changed) | |
1665 | { | |
1666 | tmp_var->obj_name = | |
1667 | savestring (var->obj_name, strlen (var->obj_name)); | |
1668 | uninstall_variable (var); | |
1669 | } | |
1670 | else | |
1671 | { | |
1672 | tmp_var->obj_name = varobj_gen_name (); | |
1673 | } | |
1674 | install_variable (tmp_var); | |
1675 | *var_handle = tmp_var; | |
1676 | *type_changed = 1; | |
1677 | } | |
1678 | } | |
1679 | else | |
1680 | { | |
1681 | *type_changed = 0; | |
1682 | } | |
1683 | ||
1684 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1685 | } |
1686 | ||
1687 | /* What is the value_ptr for the INDEX'th child of PARENT? */ | |
1688 | static value_ptr | |
1689 | value_of_child (parent, index) | |
1690 | struct varobj *parent; | |
1691 | int index; | |
1692 | { | |
1693 | value_ptr value; | |
1694 | ||
1695 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1696 | ||
1697 | /* If we're being lazy, fetch the real value of the variable. */ | |
1698 | if (value != NULL && VALUE_LAZY (value)) | |
1699 | gdb_value_fetch_lazy (value); | |
1700 | ||
1701 | return value; | |
1702 | } | |
1703 | ||
1704 | /* What is the type of VAR? */ | |
1705 | static struct type * | |
1706 | type_of_child (var) | |
1707 | struct varobj *var; | |
1708 | { | |
1709 | ||
1710 | /* If the child had no evaluation errors, var->value | |
1711 | will be non-NULL and contain a valid type. */ | |
1712 | if (var->value != NULL) | |
1713 | return VALUE_TYPE (var->value); | |
1714 | ||
1715 | /* Otherwise, we must compute the type. */ | |
1716 | return (*var->root->lang->type_of_child) (var->parent, var->index); | |
1717 | } | |
1718 | ||
1719 | /* Is this variable editable? Use the variable's type to make | |
1720 | this determination. */ | |
1721 | static int | |
1722 | variable_editable (var) | |
1723 | struct varobj *var; | |
1724 | { | |
1725 | return (*var->root->lang->variable_editable) (var); | |
1726 | } | |
1727 | ||
1728 | /* GDB already has a command called "value_of_variable". Sigh. */ | |
1729 | static char * | |
1730 | my_value_of_variable (var) | |
1731 | struct varobj *var; | |
1732 | { | |
1733 | return (*var->root->lang->value_of_variable) (var); | |
1734 | } | |
1735 | ||
1736 | /* Is VAR something that can change? Depending on language, | |
1737 | some variable's values never change. For example, | |
1738 | struct and unions never change values. */ | |
1739 | static int | |
1740 | type_changeable (var) | |
1741 | struct varobj *var; | |
1742 | { | |
1743 | int r; | |
1744 | struct type *type; | |
1745 | ||
1746 | if (CPLUS_FAKE_CHILD (var)) | |
1747 | return 0; | |
1748 | ||
1749 | type = get_type (var); | |
1750 | ||
1751 | switch (TYPE_CODE (type)) | |
1752 | { | |
1753 | case TYPE_CODE_STRUCT: | |
1754 | case TYPE_CODE_UNION: | |
1755 | r = 0; | |
1756 | break; | |
1757 | ||
1758 | default: | |
1759 | r = 1; | |
1760 | } | |
1761 | ||
1762 | return r; | |
1763 | } | |
1764 | ||
1765 | /* C */ | |
1766 | static int | |
1767 | c_number_of_children (var) | |
1768 | struct varobj *var; | |
1769 | { | |
1770 | struct type *type; | |
1771 | struct type *target; | |
1772 | int children; | |
1773 | ||
1774 | type = get_type (var); | |
1775 | target = get_target_type (type); | |
1776 | children = 0; | |
1777 | ||
1778 | switch (TYPE_CODE (type)) | |
1779 | { | |
1780 | case TYPE_CODE_ARRAY: | |
1781 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
1782 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) | |
1783 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); | |
1784 | else | |
1785 | children = -1; | |
1786 | break; | |
1787 | ||
1788 | case TYPE_CODE_STRUCT: | |
1789 | case TYPE_CODE_UNION: | |
1790 | children = TYPE_NFIELDS (type); | |
1791 | break; | |
1792 | ||
1793 | case TYPE_CODE_PTR: | |
1794 | /* This is where things get compilcated. All pointers have one child. | |
1795 | Except, of course, for struct and union ptr, which we automagically | |
1796 | dereference for the user and function ptrs, which have no children. */ | |
1797 | switch (TYPE_CODE (target)) | |
1798 | { | |
1799 | case TYPE_CODE_STRUCT: | |
1800 | case TYPE_CODE_UNION: | |
1801 | children = TYPE_NFIELDS (target); | |
1802 | break; | |
1803 | ||
1804 | case TYPE_CODE_FUNC: | |
1805 | children = 0; | |
1806 | break; | |
1807 | ||
1808 | default: | |
1809 | /* Don't dereference char* or void*. */ | |
1810 | if (TYPE_NAME (target) != NULL | |
1811 | && (STREQ (TYPE_NAME (target), "char") | |
1812 | || STREQ (TYPE_NAME (target), "void"))) | |
1813 | children = 0; | |
1814 | else | |
1815 | children = 1; | |
1816 | } | |
1817 | break; | |
1818 | ||
1819 | default: | |
1820 | /* Other types have no children */ | |
1821 | break; | |
1822 | } | |
1823 | ||
1824 | return children; | |
1825 | } | |
1826 | ||
1827 | static char * | |
1828 | c_name_of_variable (parent) | |
1829 | struct varobj *parent; | |
1830 | { | |
1831 | return savestring (parent->name, strlen (parent->name)); | |
1832 | } | |
1833 | ||
1834 | static char * | |
1835 | c_name_of_child (parent, index) | |
1836 | struct varobj *parent; | |
1837 | int index; | |
1838 | { | |
1839 | struct type *type; | |
1840 | struct type *target; | |
1841 | char *name; | |
1842 | char *string; | |
1843 | ||
1844 | type = get_type (parent); | |
1845 | target = get_target_type (type); | |
1846 | ||
1847 | switch (TYPE_CODE (type)) | |
1848 | { | |
1849 | case TYPE_CODE_ARRAY: | |
1850 | { | |
1851 | /* We never get here unless parent->num_children is greater than 0... */ | |
1852 | int len = 1; | |
1853 | while ((int) pow ((double) 10, (double) len) < index) | |
1854 | len++; | |
1855 | name = (char *) xmalloc (1 + len * sizeof (char)); | |
1856 | sprintf (name, "%d", index); | |
1857 | } | |
1858 | break; | |
1859 | ||
1860 | case TYPE_CODE_STRUCT: | |
1861 | case TYPE_CODE_UNION: | |
1862 | string = TYPE_FIELD_NAME (type, index); | |
1863 | name = savestring (string, strlen (string)); | |
1864 | break; | |
1865 | ||
1866 | case TYPE_CODE_PTR: | |
1867 | switch (TYPE_CODE (target)) | |
1868 | { | |
1869 | case TYPE_CODE_STRUCT: | |
1870 | case TYPE_CODE_UNION: | |
1871 | string = TYPE_FIELD_NAME (target, index); | |
1872 | name = savestring (string, strlen (string)); | |
1873 | break; | |
1874 | ||
1875 | default: | |
1876 | name = (char *) xmalloc ((strlen (parent->name) + 2) * sizeof (char)); | |
1877 | sprintf (name, "*%s", parent->name); | |
1878 | break; | |
1879 | } | |
1880 | break; | |
1881 | ||
1882 | default: | |
1883 | /* This should not happen */ | |
1884 | name = xstrdup ("???"); | |
1885 | } | |
1886 | ||
1887 | return name; | |
1888 | } | |
1889 | ||
1890 | static value_ptr | |
73a93a32 JI |
1891 | c_value_of_root (var_handle) |
1892 | struct varobj **var_handle; | |
8b93c638 JM |
1893 | { |
1894 | value_ptr new_val; | |
73a93a32 | 1895 | struct varobj *var = *var_handle; |
8b93c638 JM |
1896 | struct frame_info *fi; |
1897 | int within_scope; | |
1898 | ||
73a93a32 JI |
1899 | /* Only root variables can be updated... */ |
1900 | if (var->root->rootvar != var) | |
1901 | /* Not a root var */ | |
1902 | return NULL; | |
1903 | ||
1904 | ||
8b93c638 JM |
1905 | /* Determine whether the variable is still around. */ |
1906 | if (var->root->valid_block == NULL) | |
1907 | within_scope = 1; | |
1908 | else | |
1909 | { | |
1910 | reinit_frame_cache (); | |
73a93a32 JI |
1911 | |
1912 | ||
8b93c638 | 1913 | fi = find_frame_addr_in_frame_chain (var->root->frame); |
73a93a32 | 1914 | |
8b93c638 JM |
1915 | within_scope = fi != NULL; |
1916 | /* FIXME: select_frame could fail */ | |
1917 | if (within_scope) | |
1918 | select_frame (fi, -1); | |
1919 | } | |
73a93a32 | 1920 | |
8b93c638 JM |
1921 | if (within_scope) |
1922 | { | |
73a93a32 JI |
1923 | /* We need to catch errors here, because if evaluate |
1924 | expression fails we just want to make val->error = 1 and | |
1925 | go on */ | |
8b93c638 JM |
1926 | if (gdb_evaluate_expression (var->root->exp, &new_val)) |
1927 | { | |
1928 | if (VALUE_LAZY (new_val)) | |
1929 | { | |
73a93a32 JI |
1930 | /* We need to catch errors because if |
1931 | value_fetch_lazy fails we still want to continue | |
1932 | (after making val->error = 1) */ | |
1933 | /* FIXME: Shouldn't be using VALUE_CONTENTS? The | |
1934 | comment on value_fetch_lazy() says it is only | |
1935 | called from the macro... */ | |
8b93c638 JM |
1936 | if (!gdb_value_fetch_lazy (new_val)) |
1937 | var->error = 1; | |
1938 | else | |
1939 | var->error = 0; | |
1940 | } | |
1941 | } | |
1942 | else | |
1943 | var->error = 1; | |
73a93a32 | 1944 | |
8b93c638 JM |
1945 | release_value (new_val); |
1946 | return new_val; | |
1947 | } | |
1948 | ||
1949 | return NULL; | |
1950 | } | |
1951 | ||
1952 | static value_ptr | |
1953 | c_value_of_child (parent, index) | |
1954 | struct varobj *parent; | |
1955 | int index; | |
1956 | { | |
8310b29b | 1957 | value_ptr value, temp, indval; |
8b93c638 JM |
1958 | struct type *type, *target; |
1959 | char *name; | |
1960 | ||
1961 | type = get_type (parent); | |
1962 | target = get_target_type (type); | |
1963 | name = name_of_child (parent, index); | |
1964 | temp = parent->value; | |
1965 | value = NULL; | |
1966 | ||
1967 | if (temp != NULL) | |
1968 | { | |
1969 | switch (TYPE_CODE (type)) | |
1970 | { | |
1971 | case TYPE_CODE_ARRAY: | |
8310b29b FN |
1972 | #if 0 |
1973 | /* This breaks if the array lives in a (vector) register. */ | |
8b93c638 JM |
1974 | value = value_slice (temp, index, 1); |
1975 | temp = value_coerce_array (value); | |
1976 | gdb_value_ind (temp, &value); | |
8310b29b FN |
1977 | #else |
1978 | indval = value_from_longest (builtin_type_int, (LONGEST) index); | |
1979 | gdb_value_subscript (temp, indval, &value); | |
1980 | #endif | |
8b93c638 JM |
1981 | break; |
1982 | ||
1983 | case TYPE_CODE_STRUCT: | |
1984 | case TYPE_CODE_UNION: | |
1985 | value = value_struct_elt (&temp, NULL, name, NULL, "vstructure"); | |
1986 | break; | |
1987 | ||
1988 | case TYPE_CODE_PTR: | |
1989 | switch (TYPE_CODE (target)) | |
1990 | { | |
1991 | case TYPE_CODE_STRUCT: | |
1992 | case TYPE_CODE_UNION: | |
1993 | value = value_struct_elt (&temp, NULL, name, NULL, "vstructure"); | |
1994 | break; | |
1995 | ||
1996 | default: | |
1997 | gdb_value_ind (temp, &value); | |
1998 | break; | |
1999 | } | |
2000 | break; | |
2001 | ||
2002 | default: | |
2003 | break; | |
2004 | } | |
2005 | } | |
2006 | ||
2007 | if (value != NULL) | |
2008 | release_value (value); | |
2009 | ||
2010 | return value; | |
2011 | } | |
2012 | ||
2013 | static struct type * | |
2014 | c_type_of_child (parent, index) | |
2015 | struct varobj *parent; | |
2016 | int index; | |
2017 | { | |
2018 | struct type *type; | |
2019 | char *name = name_of_child (parent, index); | |
2020 | ||
2021 | switch (TYPE_CODE (parent->type)) | |
2022 | { | |
2023 | case TYPE_CODE_ARRAY: | |
2024 | type = TYPE_TARGET_TYPE (parent->type); | |
2025 | break; | |
2026 | ||
2027 | case TYPE_CODE_STRUCT: | |
2028 | case TYPE_CODE_UNION: | |
2029 | type = lookup_struct_elt_type (parent->type, name, 0); | |
2030 | break; | |
2031 | ||
2032 | case TYPE_CODE_PTR: | |
2033 | switch (TYPE_CODE (TYPE_TARGET_TYPE (parent->type))) | |
2034 | { | |
2035 | case TYPE_CODE_STRUCT: | |
2036 | case TYPE_CODE_UNION: | |
2037 | type = lookup_struct_elt_type (parent->type, name, 0); | |
2038 | break; | |
2039 | ||
2040 | default: | |
2041 | type = TYPE_TARGET_TYPE (parent->type); | |
2042 | break; | |
2043 | } | |
2044 | break; | |
2045 | ||
2046 | default: | |
2047 | /* This should not happen as only the above types have children */ | |
2048 | warning ("Child of parent whose type does not allow children"); | |
2049 | /* FIXME: Can we still go on? */ | |
2050 | type = NULL; | |
2051 | break; | |
2052 | } | |
2053 | ||
2054 | return type; | |
2055 | } | |
2056 | ||
2057 | static int | |
2058 | c_variable_editable (var) | |
2059 | struct varobj *var; | |
2060 | { | |
2061 | switch (TYPE_CODE (get_type (var))) | |
2062 | { | |
2063 | case TYPE_CODE_STRUCT: | |
2064 | case TYPE_CODE_UNION: | |
2065 | case TYPE_CODE_ARRAY: | |
2066 | case TYPE_CODE_FUNC: | |
2067 | case TYPE_CODE_MEMBER: | |
2068 | case TYPE_CODE_METHOD: | |
2069 | return 0; | |
2070 | break; | |
2071 | ||
2072 | default: | |
2073 | return 1; | |
2074 | break; | |
2075 | } | |
2076 | } | |
2077 | ||
2078 | static char * | |
2079 | c_value_of_variable (var) | |
2080 | struct varobj *var; | |
2081 | { | |
2082 | struct type *type; | |
2083 | value_ptr val; | |
2084 | ||
2085 | if (var->value != NULL) | |
2086 | val = var->value; | |
2087 | else | |
2088 | { | |
2089 | /* This can happen if we attempt to get the value of a struct | |
2090 | member when the parent is an invalid pointer. */ | |
2091 | return xstrdup ("???"); | |
2092 | } | |
2093 | ||
2094 | /* BOGUS: if val_print sees a struct/class, it will print out its | |
2095 | children instead of "{...}" */ | |
2096 | type = get_type (var); | |
2097 | switch (TYPE_CODE (type)) | |
2098 | { | |
2099 | case TYPE_CODE_STRUCT: | |
2100 | case TYPE_CODE_UNION: | |
2101 | return xstrdup ("{...}"); | |
2102 | /* break; */ | |
2103 | ||
2104 | case TYPE_CODE_ARRAY: | |
2105 | { | |
2106 | char number[18]; | |
2107 | sprintf (number, "[%d]", var->num_children); | |
2108 | return xstrdup (number); | |
2109 | } | |
2110 | /* break; */ | |
2111 | ||
2112 | default: | |
2113 | { | |
2114 | long dummy; | |
2115 | struct ui_file *stb = mem_fileopen (); | |
2116 | struct cleanup *old_chain = make_cleanup_ui_file_delete (stb); | |
2117 | char *thevalue; | |
2118 | ||
2119 | if (VALUE_LAZY (val)) | |
2120 | gdb_value_fetch_lazy (val); | |
2121 | val_print (VALUE_TYPE (val), VALUE_CONTENTS_RAW (val), 0, | |
2122 | VALUE_ADDRESS (val), | |
2123 | stb, format_code[(int) var->format], 1, 0, 0); | |
2124 | thevalue = ui_file_xstrdup (stb, &dummy); | |
2125 | do_cleanups (old_chain); | |
2126 | return thevalue; | |
2127 | } | |
2128 | /* break; */ | |
2129 | } | |
2130 | } | |
2131 | \f | |
2132 | ||
2133 | /* C++ */ | |
2134 | ||
2135 | static int | |
2136 | cplus_number_of_children (var) | |
2137 | struct varobj *var; | |
2138 | { | |
2139 | struct type *type; | |
2140 | int children, dont_know; | |
2141 | ||
2142 | dont_know = 1; | |
2143 | children = 0; | |
2144 | ||
2145 | if (!CPLUS_FAKE_CHILD (var)) | |
2146 | { | |
2147 | type = get_type_deref (var); | |
2148 | ||
2149 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
2150 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) | |
2151 | { | |
2152 | int kids[3]; | |
2153 | ||
2154 | cplus_class_num_children (type, kids); | |
2155 | if (kids[v_public] != 0) | |
2156 | children++; | |
2157 | if (kids[v_private] != 0) | |
2158 | children++; | |
2159 | if (kids[v_protected] != 0) | |
2160 | children++; | |
2161 | ||
2162 | /* Add any baseclasses */ | |
2163 | children += TYPE_N_BASECLASSES (type); | |
2164 | dont_know = 0; | |
2165 | ||
2166 | /* FIXME: save children in var */ | |
2167 | } | |
2168 | } | |
2169 | else | |
2170 | { | |
2171 | int kids[3]; | |
2172 | ||
2173 | type = get_type_deref (var->parent); | |
2174 | ||
2175 | cplus_class_num_children (type, kids); | |
2176 | if (STREQ (var->name, "public")) | |
2177 | children = kids[v_public]; | |
2178 | else if (STREQ (var->name, "private")) | |
2179 | children = kids[v_private]; | |
2180 | else | |
2181 | children = kids[v_protected]; | |
2182 | dont_know = 0; | |
2183 | } | |
2184 | ||
2185 | if (dont_know) | |
2186 | children = c_number_of_children (var); | |
2187 | ||
2188 | return children; | |
2189 | } | |
2190 | ||
2191 | /* Compute # of public, private, and protected variables in this class. | |
2192 | That means we need to descend into all baseclasses and find out | |
2193 | how many are there, too. */ | |
2194 | static void | |
2195 | cplus_class_num_children (type, children) | |
2196 | struct type *type; | |
2197 | int children[3]; | |
2198 | { | |
2199 | int i; | |
2200 | ||
2201 | children[v_public] = 0; | |
2202 | children[v_private] = 0; | |
2203 | children[v_protected] = 0; | |
2204 | ||
2205 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2206 | { | |
2207 | /* If we have a virtual table pointer, omit it. */ | |
2208 | if (TYPE_VPTR_BASETYPE (type) == type | |
2209 | && TYPE_VPTR_FIELDNO (type) == i) | |
2210 | continue; | |
2211 | ||
2212 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2213 | children[v_protected]++; | |
2214 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2215 | children[v_private]++; | |
2216 | else | |
2217 | children[v_public]++; | |
2218 | } | |
2219 | } | |
2220 | ||
2221 | static char * | |
2222 | cplus_name_of_variable (parent) | |
2223 | struct varobj *parent; | |
2224 | { | |
2225 | return c_name_of_variable (parent); | |
2226 | } | |
2227 | ||
2228 | static char * | |
2229 | cplus_name_of_child (parent, index) | |
2230 | struct varobj *parent; | |
2231 | int index; | |
2232 | { | |
2233 | char *name; | |
2234 | struct type *type; | |
2235 | int children[3]; | |
2236 | ||
2237 | if (CPLUS_FAKE_CHILD (parent)) | |
2238 | { | |
2239 | /* Looking for children of public, private, or protected. */ | |
2240 | type = get_type_deref (parent->parent); | |
2241 | } | |
2242 | else | |
2243 | type = get_type_deref (parent); | |
2244 | ||
2245 | name = NULL; | |
2246 | switch (TYPE_CODE (type)) | |
2247 | { | |
2248 | case TYPE_CODE_STRUCT: | |
2249 | case TYPE_CODE_UNION: | |
2250 | cplus_class_num_children (type, children); | |
2251 | ||
2252 | if (CPLUS_FAKE_CHILD (parent)) | |
2253 | { | |
2254 | /* FIXME: This assumes that type orders | |
2255 | inherited, public, private, protected */ | |
2256 | int i = index + TYPE_N_BASECLASSES (type); | |
2257 | if (STREQ (parent->name, "private") || STREQ (parent->name, "protected")) | |
2258 | i += children[v_public]; | |
2259 | if (STREQ (parent->name, "protected")) | |
2260 | i += children[v_private]; | |
2261 | ||
2262 | name = TYPE_FIELD_NAME (type, i); | |
2263 | } | |
2264 | else if (index < TYPE_N_BASECLASSES (type)) | |
2265 | name = TYPE_FIELD_NAME (type, index); | |
2266 | else | |
2267 | { | |
2268 | /* Everything beyond the baseclasses can | |
2269 | only be "public", "private", or "protected" */ | |
2270 | index -= TYPE_N_BASECLASSES (type); | |
2271 | switch (index) | |
2272 | { | |
2273 | case 0: | |
2274 | if (children[v_public] != 0) | |
2275 | { | |
2276 | name = "public"; | |
2277 | break; | |
2278 | } | |
2279 | case 1: | |
2280 | if (children[v_private] != 0) | |
2281 | { | |
2282 | name = "private"; | |
2283 | break; | |
2284 | } | |
2285 | case 2: | |
2286 | if (children[v_protected] != 0) | |
2287 | { | |
2288 | name = "protected"; | |
2289 | break; | |
2290 | } | |
2291 | default: | |
2292 | /* error! */ | |
2293 | break; | |
2294 | } | |
2295 | } | |
2296 | break; | |
2297 | ||
2298 | default: | |
2299 | break; | |
2300 | } | |
2301 | ||
2302 | if (name == NULL) | |
2303 | return c_name_of_child (parent, index); | |
2304 | else | |
2305 | { | |
2306 | if (name != NULL) | |
2307 | name = savestring (name, strlen (name)); | |
2308 | } | |
2309 | ||
2310 | return name; | |
2311 | } | |
2312 | ||
2313 | static value_ptr | |
73a93a32 JI |
2314 | cplus_value_of_root (var_handle) |
2315 | struct varobj **var_handle; | |
8b93c638 | 2316 | { |
73a93a32 | 2317 | return c_value_of_root (var_handle); |
8b93c638 JM |
2318 | } |
2319 | ||
2320 | static value_ptr | |
2321 | cplus_value_of_child (parent, index) | |
2322 | struct varobj *parent; | |
2323 | int index; | |
2324 | { | |
2325 | struct type *type; | |
2326 | value_ptr value; | |
2327 | char *name; | |
2328 | ||
2329 | if (CPLUS_FAKE_CHILD (parent)) | |
2330 | type = get_type_deref (parent->parent); | |
2331 | else | |
2332 | type = get_type_deref (parent); | |
2333 | ||
2334 | value = NULL; | |
2335 | name = name_of_child (parent, index); | |
2336 | ||
2337 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
2338 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) | |
2339 | { | |
2340 | if (CPLUS_FAKE_CHILD (parent)) | |
2341 | { | |
2342 | value_ptr temp = parent->parent->value; | |
2343 | value = value_struct_elt (&temp, NULL, name, | |
2344 | NULL, "cplus_structure"); | |
2345 | release_value (value); | |
2346 | } | |
2347 | else if (index >= TYPE_N_BASECLASSES (type)) | |
2348 | { | |
2349 | /* public, private, or protected */ | |
2350 | return NULL; | |
2351 | } | |
2352 | else | |
2353 | { | |
2354 | /* Baseclass */ | |
2355 | if (parent->value != NULL) | |
2356 | { | |
2357 | value_ptr temp; | |
2358 | ||
2359 | if (TYPE_CODE (VALUE_TYPE (parent->value)) == TYPE_CODE_PTR | |
2360 | || TYPE_CODE (VALUE_TYPE (parent->value)) == TYPE_CODE_REF) | |
2361 | gdb_value_ind (parent->value, &temp); | |
2362 | else | |
2363 | temp = parent->value; | |
2364 | ||
2365 | value = value_cast (TYPE_FIELD_TYPE (type, index), temp); | |
2366 | release_value (value); | |
2367 | } | |
2368 | } | |
2369 | } | |
2370 | ||
2371 | if (value == NULL) | |
2372 | return c_value_of_child (parent, index); | |
2373 | ||
2374 | return value; | |
2375 | } | |
2376 | ||
2377 | static struct type * | |
2378 | cplus_type_of_child (parent, index) | |
2379 | struct varobj *parent; | |
2380 | int index; | |
2381 | { | |
2382 | struct type *type, *t; | |
2383 | ||
2384 | t = get_type_deref (parent); | |
2385 | type = NULL; | |
2386 | switch (TYPE_CODE (t)) | |
2387 | { | |
2388 | case TYPE_CODE_STRUCT: | |
2389 | case TYPE_CODE_UNION: | |
2390 | if (index >= TYPE_N_BASECLASSES (t)) | |
2391 | { | |
2392 | /* special */ | |
2393 | return NULL; | |
2394 | } | |
2395 | else | |
2396 | { | |
2397 | /* Baseclass */ | |
2398 | type = TYPE_FIELD_TYPE (t, index); | |
2399 | } | |
2400 | break; | |
2401 | ||
2402 | default: | |
2403 | break; | |
2404 | } | |
2405 | ||
2406 | if (type == NULL) | |
2407 | return c_type_of_child (parent, index); | |
2408 | ||
2409 | return type; | |
2410 | } | |
2411 | ||
2412 | static int | |
2413 | cplus_variable_editable (var) | |
2414 | struct varobj *var; | |
2415 | { | |
2416 | if (CPLUS_FAKE_CHILD (var)) | |
2417 | return 0; | |
2418 | ||
2419 | return c_variable_editable (var); | |
2420 | } | |
2421 | ||
2422 | static char * | |
2423 | cplus_value_of_variable (var) | |
2424 | struct varobj *var; | |
2425 | { | |
2426 | ||
2427 | /* If we have one of our special types, don't print out | |
2428 | any value. */ | |
2429 | if (CPLUS_FAKE_CHILD (var)) | |
2430 | return xstrdup (""); | |
2431 | ||
2432 | return c_value_of_variable (var); | |
2433 | } | |
2434 | \f | |
2435 | /* Java */ | |
2436 | ||
2437 | static int | |
2438 | java_number_of_children (var) | |
2439 | struct varobj *var; | |
2440 | { | |
2441 | return cplus_number_of_children (var); | |
2442 | } | |
2443 | ||
2444 | static char * | |
2445 | java_name_of_variable (parent) | |
2446 | struct varobj *parent; | |
2447 | { | |
2448 | char *p, *name; | |
2449 | ||
2450 | name = cplus_name_of_variable (parent); | |
2451 | /* If the name has "-" in it, it is because we | |
2452 | needed to escape periods in the name... */ | |
2453 | p = name; | |
2454 | ||
2455 | while (*p != '\000') | |
2456 | { | |
2457 | if (*p == '-') | |
2458 | *p = '.'; | |
2459 | p++; | |
2460 | } | |
2461 | ||
2462 | return name; | |
2463 | } | |
2464 | ||
2465 | static char * | |
2466 | java_name_of_child (parent, index) | |
2467 | struct varobj *parent; | |
2468 | int index; | |
2469 | { | |
2470 | char *name, *p; | |
2471 | ||
2472 | name = cplus_name_of_child (parent, index); | |
2473 | /* Escape any periods in the name... */ | |
2474 | p = name; | |
2475 | ||
2476 | while (*p != '\000') | |
2477 | { | |
2478 | if (*p == '.') | |
2479 | *p = '-'; | |
2480 | p++; | |
2481 | } | |
2482 | ||
2483 | return name; | |
2484 | } | |
2485 | ||
2486 | static value_ptr | |
73a93a32 JI |
2487 | java_value_of_root (var_handle) |
2488 | struct varobj **var_handle; | |
8b93c638 | 2489 | { |
73a93a32 | 2490 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2491 | } |
2492 | ||
2493 | static value_ptr | |
2494 | java_value_of_child (parent, index) | |
2495 | struct varobj *parent; | |
2496 | int index; | |
2497 | { | |
2498 | return cplus_value_of_child (parent, index); | |
2499 | } | |
2500 | ||
2501 | static struct type * | |
2502 | java_type_of_child (parent, index) | |
2503 | struct varobj *parent; | |
2504 | int index; | |
2505 | { | |
2506 | return cplus_type_of_child (parent, index); | |
2507 | } | |
2508 | ||
2509 | static int | |
2510 | java_variable_editable (var) | |
2511 | struct varobj *var; | |
2512 | { | |
2513 | return cplus_variable_editable (var); | |
2514 | } | |
2515 | ||
2516 | static char * | |
2517 | java_value_of_variable (var) | |
2518 | struct varobj *var; | |
2519 | { | |
2520 | return cplus_value_of_variable (var); | |
2521 | } | |
2522 | \f | |
2523 | extern void _initialize_varobj (void); | |
2524 | void | |
2525 | _initialize_varobj (void) | |
2526 | { | |
2527 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2528 | ||
2529 | varobj_table = xmalloc (sizeof_table); | |
2530 | memset (varobj_table, 0, sizeof_table); | |
2531 | ||
2532 | add_show_from_set ( | |
2533 | add_set_cmd ("debugvarobj", class_maintenance, var_zinteger, | |
2534 | (char *) &varobjdebug, | |
2535 | "Set varobj debugging.\n\ | |
2536 | When non-zero, varobj debugging is enabled.", &setlist), | |
2537 | &showlist); | |
2538 | } |