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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
32d0add0 | 3 | Copyright (C) 1999-2015 Free Software Foundation, Inc. |
8b93c638 JM |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 7 | the Free Software Foundation; either version 3 of the License, or |
8b93c638 JM |
8 | (at your option) any later version. |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8b93c638 JM |
17 | |
18 | #include "defs.h" | |
19 | #include "value.h" | |
20 | #include "expression.h" | |
21 | #include "frame.h" | |
8b93c638 | 22 | #include "language.h" |
8b93c638 | 23 | #include "gdbcmd.h" |
d2353924 | 24 | #include "block.h" |
79a45b7d | 25 | #include "valprint.h" |
0cc7d26f | 26 | #include "gdb_regex.h" |
8b93c638 JM |
27 | |
28 | #include "varobj.h" | |
28335dcc | 29 | #include "vec.h" |
6208b47d VP |
30 | #include "gdbthread.h" |
31 | #include "inferior.h" | |
827f100c | 32 | #include "varobj-iter.h" |
8b93c638 | 33 | |
b6313243 TT |
34 | #if HAVE_PYTHON |
35 | #include "python/python.h" | |
36 | #include "python/python-internal.h" | |
50389644 PA |
37 | #else |
38 | typedef int PyObject; | |
b6313243 TT |
39 | #endif |
40 | ||
8b93c638 JM |
41 | /* Non-zero if we want to see trace of varobj level stuff. */ |
42 | ||
ccce17b0 | 43 | unsigned int varobjdebug = 0; |
920d2a44 AC |
44 | static void |
45 | show_varobjdebug (struct ui_file *file, int from_tty, | |
46 | struct cmd_list_element *c, const char *value) | |
47 | { | |
48 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
49 | } | |
8b93c638 | 50 | |
581e13c1 | 51 | /* String representations of gdb's format codes. */ |
8b93c638 | 52 | char *varobj_format_string[] = |
72330bd6 | 53 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 | 54 | |
0cc7d26f TT |
55 | /* True if we want to allow Python-based pretty-printing. */ |
56 | static int pretty_printing = 0; | |
57 | ||
58 | void | |
59 | varobj_enable_pretty_printing (void) | |
60 | { | |
61 | pretty_printing = 1; | |
62 | } | |
63 | ||
8b93c638 JM |
64 | /* Data structures */ |
65 | ||
66 | /* Every root variable has one of these structures saved in its | |
581e13c1 | 67 | varobj. Members which must be free'd are noted. */ |
8b93c638 | 68 | struct varobj_root |
72330bd6 | 69 | { |
8b93c638 | 70 | |
581e13c1 | 71 | /* Alloc'd expression for this parent. */ |
72330bd6 | 72 | struct expression *exp; |
8b93c638 | 73 | |
581e13c1 | 74 | /* Block for which this expression is valid. */ |
270140bd | 75 | const struct block *valid_block; |
8b93c638 | 76 | |
44a67aa7 VP |
77 | /* The frame for this expression. This field is set iff valid_block is |
78 | not NULL. */ | |
e64d9b3d | 79 | struct frame_id frame; |
8b93c638 | 80 | |
c5b48eac | 81 | /* The thread ID that this varobj_root belong to. This field |
581e13c1 | 82 | is only valid if valid_block is not NULL. |
c5b48eac VP |
83 | When not 0, indicates which thread 'frame' belongs to. |
84 | When 0, indicates that the thread list was empty when the varobj_root | |
85 | was created. */ | |
86 | int thread_id; | |
87 | ||
a5defcdc VP |
88 | /* If 1, the -var-update always recomputes the value in the |
89 | current thread and frame. Otherwise, variable object is | |
581e13c1 | 90 | always updated in the specific scope/thread/frame. */ |
a5defcdc | 91 | int floating; |
73a93a32 | 92 | |
8756216b DP |
93 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
94 | to symbols that do not exist anymore. */ | |
95 | int is_valid; | |
96 | ||
99ad9427 YQ |
97 | /* Language-related operations for this variable and its |
98 | children. */ | |
ca20d462 | 99 | const struct lang_varobj_ops *lang_ops; |
8b93c638 | 100 | |
581e13c1 | 101 | /* The varobj for this root node. */ |
72330bd6 | 102 | struct varobj *rootvar; |
8b93c638 | 103 | |
72330bd6 AC |
104 | /* Next root variable */ |
105 | struct varobj_root *next; | |
106 | }; | |
8b93c638 | 107 | |
bb5ce47a | 108 | /* Dynamic part of varobj. */ |
8b93c638 | 109 | |
bb5ce47a YQ |
110 | struct varobj_dynamic |
111 | { | |
b6313243 TT |
112 | /* Whether the children of this varobj were requested. This field is |
113 | used to decide if dynamic varobj should recompute their children. | |
114 | In the event that the frontend never asked for the children, we | |
115 | can avoid that. */ | |
116 | int children_requested; | |
117 | ||
0cc7d26f TT |
118 | /* The pretty-printer constructor. If NULL, then the default |
119 | pretty-printer will be looked up. If None, then no | |
120 | pretty-printer will be installed. */ | |
121 | PyObject *constructor; | |
122 | ||
b6313243 TT |
123 | /* The pretty-printer that has been constructed. If NULL, then a |
124 | new printer object is needed, and one will be constructed. */ | |
125 | PyObject *pretty_printer; | |
0cc7d26f TT |
126 | |
127 | /* The iterator returned by the printer's 'children' method, or NULL | |
128 | if not available. */ | |
e5250216 | 129 | struct varobj_iter *child_iter; |
0cc7d26f TT |
130 | |
131 | /* We request one extra item from the iterator, so that we can | |
132 | report to the caller whether there are more items than we have | |
133 | already reported. However, we don't want to install this value | |
134 | when we read it, because that will mess up future updates. So, | |
135 | we stash it here instead. */ | |
e5250216 | 136 | varobj_item *saved_item; |
72330bd6 | 137 | }; |
8b93c638 | 138 | |
8b93c638 | 139 | struct cpstack |
72330bd6 AC |
140 | { |
141 | char *name; | |
142 | struct cpstack *next; | |
143 | }; | |
8b93c638 JM |
144 | |
145 | /* A list of varobjs */ | |
146 | ||
147 | struct vlist | |
72330bd6 AC |
148 | { |
149 | struct varobj *var; | |
150 | struct vlist *next; | |
151 | }; | |
8b93c638 JM |
152 | |
153 | /* Private function prototypes */ | |
154 | ||
581e13c1 | 155 | /* Helper functions for the above subcommands. */ |
8b93c638 | 156 | |
a14ed312 | 157 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 158 | |
a14ed312 KB |
159 | static void delete_variable_1 (struct cpstack **, int *, |
160 | struct varobj *, int, int); | |
8b93c638 | 161 | |
a14ed312 | 162 | static int install_variable (struct varobj *); |
8b93c638 | 163 | |
a14ed312 | 164 | static void uninstall_variable (struct varobj *); |
8b93c638 | 165 | |
a14ed312 | 166 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 167 | |
b6313243 | 168 | static struct varobj * |
5a2e0d6e YQ |
169 | create_child_with_value (struct varobj *parent, int index, |
170 | struct varobj_item *item); | |
b6313243 | 171 | |
8b93c638 JM |
172 | /* Utility routines */ |
173 | ||
a14ed312 | 174 | static struct varobj *new_variable (void); |
8b93c638 | 175 | |
a14ed312 | 176 | static struct varobj *new_root_variable (void); |
8b93c638 | 177 | |
a14ed312 | 178 | static void free_variable (struct varobj *var); |
8b93c638 | 179 | |
74b7792f AC |
180 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
181 | ||
a14ed312 | 182 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 183 | |
a14ed312 | 184 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 185 | |
a14ed312 | 186 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 187 | |
8264ba82 AG |
188 | static int update_type_if_necessary (struct varobj *var, |
189 | struct value *new_value); | |
190 | ||
acd65feb VP |
191 | static int install_new_value (struct varobj *var, struct value *value, |
192 | int initial); | |
193 | ||
581e13c1 | 194 | /* Language-specific routines. */ |
8b93c638 | 195 | |
a14ed312 | 196 | static int number_of_children (struct varobj *); |
8b93c638 | 197 | |
a14ed312 | 198 | static char *name_of_variable (struct varobj *); |
8b93c638 | 199 | |
a14ed312 | 200 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 201 | |
30b28db1 | 202 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 203 | |
30b28db1 | 204 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 205 | |
de051565 MK |
206 | static char *my_value_of_variable (struct varobj *var, |
207 | enum varobj_display_formats format); | |
8b93c638 | 208 | |
b2c2bd75 | 209 | static int is_root_p (struct varobj *var); |
8b93c638 | 210 | |
9a1edae6 | 211 | static struct varobj *varobj_add_child (struct varobj *var, |
5a2e0d6e | 212 | struct varobj_item *item); |
b6313243 | 213 | |
8b93c638 JM |
214 | /* Private data */ |
215 | ||
581e13c1 | 216 | /* Mappings of varobj_display_formats enums to gdb's format codes. */ |
72330bd6 | 217 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 | 218 | |
581e13c1 | 219 | /* Header of the list of root variable objects. */ |
8b93c638 | 220 | static struct varobj_root *rootlist; |
8b93c638 | 221 | |
581e13c1 MS |
222 | /* Prime number indicating the number of buckets in the hash table. */ |
223 | /* A prime large enough to avoid too many colisions. */ | |
8b93c638 JM |
224 | #define VAROBJ_TABLE_SIZE 227 |
225 | ||
581e13c1 | 226 | /* Pointer to the varobj hash table (built at run time). */ |
8b93c638 JM |
227 | static struct vlist **varobj_table; |
228 | ||
8b93c638 JM |
229 | \f |
230 | ||
231 | /* API Implementation */ | |
b2c2bd75 VP |
232 | static int |
233 | is_root_p (struct varobj *var) | |
234 | { | |
235 | return (var->root->rootvar == var); | |
236 | } | |
8b93c638 | 237 | |
d452c4bc UW |
238 | #ifdef HAVE_PYTHON |
239 | /* Helper function to install a Python environment suitable for | |
240 | use during operations on VAR. */ | |
e5250216 | 241 | struct cleanup * |
d452c4bc UW |
242 | varobj_ensure_python_env (struct varobj *var) |
243 | { | |
244 | return ensure_python_env (var->root->exp->gdbarch, | |
245 | var->root->exp->language_defn); | |
246 | } | |
247 | #endif | |
248 | ||
581e13c1 | 249 | /* Creates a varobj (not its children). */ |
8b93c638 | 250 | |
7d8547c9 AC |
251 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
252 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
253 | ||
254 | static struct frame_info * | |
255 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
256 | { | |
257 | struct frame_info *frame = NULL; | |
258 | ||
259 | if (frame_addr == (CORE_ADDR) 0) | |
260 | return NULL; | |
261 | ||
9d49bdc2 PA |
262 | for (frame = get_current_frame (); |
263 | frame != NULL; | |
264 | frame = get_prev_frame (frame)) | |
7d8547c9 | 265 | { |
1fac167a UW |
266 | /* The CORE_ADDR we get as argument was parsed from a string GDB |
267 | output as $fp. This output got truncated to gdbarch_addr_bit. | |
268 | Truncate the frame base address in the same manner before | |
269 | comparing it against our argument. */ | |
270 | CORE_ADDR frame_base = get_frame_base_address (frame); | |
271 | int addr_bit = gdbarch_addr_bit (get_frame_arch (frame)); | |
a109c7c1 | 272 | |
1fac167a UW |
273 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
274 | frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
275 | ||
276 | if (frame_base == frame_addr) | |
7d8547c9 AC |
277 | return frame; |
278 | } | |
9d49bdc2 PA |
279 | |
280 | return NULL; | |
7d8547c9 AC |
281 | } |
282 | ||
8b93c638 JM |
283 | struct varobj * |
284 | varobj_create (char *objname, | |
72330bd6 | 285 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
286 | { |
287 | struct varobj *var; | |
8b93c638 JM |
288 | struct cleanup *old_chain; |
289 | ||
581e13c1 | 290 | /* Fill out a varobj structure for the (root) variable being constructed. */ |
8b93c638 | 291 | var = new_root_variable (); |
74b7792f | 292 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
293 | |
294 | if (expression != NULL) | |
295 | { | |
e4195b40 | 296 | struct frame_info *fi; |
35633fef | 297 | struct frame_id old_id = null_frame_id; |
3977b71f | 298 | const struct block *block; |
bbc13ae3 | 299 | const char *p; |
e55dccf0 | 300 | struct value *value = NULL; |
8e7b59a5 | 301 | volatile struct gdb_exception except; |
1bb9788d | 302 | CORE_ADDR pc; |
8b93c638 | 303 | |
9d49bdc2 PA |
304 | /* Parse and evaluate the expression, filling in as much of the |
305 | variable's data as possible. */ | |
306 | ||
307 | if (has_stack_frames ()) | |
308 | { | |
581e13c1 | 309 | /* Allow creator to specify context of variable. */ |
9d49bdc2 PA |
310 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
311 | fi = get_selected_frame (NULL); | |
312 | else | |
313 | /* FIXME: cagney/2002-11-23: This code should be doing a | |
314 | lookup using the frame ID and not just the frame's | |
315 | ``address''. This, of course, means an interface | |
316 | change. However, with out that interface change ISAs, | |
317 | such as the ia64 with its two stacks, won't work. | |
318 | Similar goes for the case where there is a frameless | |
319 | function. */ | |
320 | fi = find_frame_addr_in_frame_chain (frame); | |
321 | } | |
8b93c638 | 322 | else |
9d49bdc2 | 323 | fi = NULL; |
8b93c638 | 324 | |
581e13c1 | 325 | /* frame = -2 means always use selected frame. */ |
73a93a32 | 326 | if (type == USE_SELECTED_FRAME) |
a5defcdc | 327 | var->root->floating = 1; |
73a93a32 | 328 | |
1bb9788d | 329 | pc = 0; |
8b93c638 JM |
330 | block = NULL; |
331 | if (fi != NULL) | |
1bb9788d TT |
332 | { |
333 | block = get_frame_block (fi, 0); | |
334 | pc = get_frame_pc (fi); | |
335 | } | |
8b93c638 JM |
336 | |
337 | p = expression; | |
338 | innermost_block = NULL; | |
73a93a32 | 339 | /* Wrap the call to parse expression, so we can |
581e13c1 | 340 | return a sensible error. */ |
8e7b59a5 KS |
341 | TRY_CATCH (except, RETURN_MASK_ERROR) |
342 | { | |
1bb9788d | 343 | var->root->exp = parse_exp_1 (&p, pc, block, 0); |
8e7b59a5 KS |
344 | } |
345 | ||
346 | if (except.reason < 0) | |
73a93a32 | 347 | { |
f748fb40 | 348 | do_cleanups (old_chain); |
73a93a32 JI |
349 | return NULL; |
350 | } | |
8b93c638 | 351 | |
581e13c1 | 352 | /* Don't allow variables to be created for types. */ |
608b4967 TT |
353 | if (var->root->exp->elts[0].opcode == OP_TYPE |
354 | || var->root->exp->elts[0].opcode == OP_TYPEOF | |
355 | || var->root->exp->elts[0].opcode == OP_DECLTYPE) | |
8b93c638 JM |
356 | { |
357 | do_cleanups (old_chain); | |
bc8332bb AC |
358 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
359 | " as an expression.\n"); | |
8b93c638 JM |
360 | return NULL; |
361 | } | |
362 | ||
363 | var->format = variable_default_display (var); | |
364 | var->root->valid_block = innermost_block; | |
1b36a34b | 365 | var->name = xstrdup (expression); |
02142340 | 366 | /* For a root var, the name and the expr are the same. */ |
1b36a34b | 367 | var->path_expr = xstrdup (expression); |
8b93c638 JM |
368 | |
369 | /* When the frame is different from the current frame, | |
370 | we must select the appropriate frame before parsing | |
371 | the expression, otherwise the value will not be current. | |
581e13c1 | 372 | Since select_frame is so benign, just call it for all cases. */ |
4e22772d | 373 | if (innermost_block) |
8b93c638 | 374 | { |
4e22772d JK |
375 | /* User could specify explicit FRAME-ADDR which was not found but |
376 | EXPRESSION is frame specific and we would not be able to evaluate | |
377 | it correctly next time. With VALID_BLOCK set we must also set | |
378 | FRAME and THREAD_ID. */ | |
379 | if (fi == NULL) | |
380 | error (_("Failed to find the specified frame")); | |
381 | ||
7a424e99 | 382 | var->root->frame = get_frame_id (fi); |
c5b48eac | 383 | var->root->thread_id = pid_to_thread_id (inferior_ptid); |
35633fef | 384 | old_id = get_frame_id (get_selected_frame (NULL)); |
c5b48eac | 385 | select_frame (fi); |
8b93c638 JM |
386 | } |
387 | ||
340a7723 | 388 | /* We definitely need to catch errors here. |
8b93c638 | 389 | If evaluate_expression succeeds we got the value we wanted. |
581e13c1 | 390 | But if it fails, we still go on with a call to evaluate_type(). */ |
8e7b59a5 KS |
391 | TRY_CATCH (except, RETURN_MASK_ERROR) |
392 | { | |
393 | value = evaluate_expression (var->root->exp); | |
394 | } | |
395 | ||
396 | if (except.reason < 0) | |
e55dccf0 VP |
397 | { |
398 | /* Error getting the value. Try to at least get the | |
399 | right type. */ | |
400 | struct value *type_only_value = evaluate_type (var->root->exp); | |
a109c7c1 | 401 | |
e55dccf0 VP |
402 | var->type = value_type (type_only_value); |
403 | } | |
8264ba82 AG |
404 | else |
405 | { | |
406 | int real_type_found = 0; | |
407 | ||
408 | var->type = value_actual_type (value, 0, &real_type_found); | |
409 | if (real_type_found) | |
410 | value = value_cast (var->type, value); | |
411 | } | |
acd65feb | 412 | |
8b93c638 | 413 | /* Set language info */ |
ca20d462 | 414 | var->root->lang_ops = var->root->exp->language_defn->la_varobj_ops; |
8b93c638 | 415 | |
d32cafc7 JB |
416 | install_new_value (var, value, 1 /* Initial assignment */); |
417 | ||
581e13c1 | 418 | /* Set ourselves as our root. */ |
8b93c638 JM |
419 | var->root->rootvar = var; |
420 | ||
581e13c1 | 421 | /* Reset the selected frame. */ |
35633fef JK |
422 | if (frame_id_p (old_id)) |
423 | select_frame (frame_find_by_id (old_id)); | |
8b93c638 JM |
424 | } |
425 | ||
73a93a32 | 426 | /* If the variable object name is null, that means this |
581e13c1 | 427 | is a temporary variable, so don't install it. */ |
73a93a32 JI |
428 | |
429 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 | 430 | { |
1b36a34b | 431 | var->obj_name = xstrdup (objname); |
8b93c638 JM |
432 | |
433 | /* If a varobj name is duplicated, the install will fail so | |
581e13c1 | 434 | we must cleanup. */ |
8b93c638 JM |
435 | if (!install_variable (var)) |
436 | { | |
437 | do_cleanups (old_chain); | |
438 | return NULL; | |
439 | } | |
440 | } | |
441 | ||
442 | discard_cleanups (old_chain); | |
443 | return var; | |
444 | } | |
445 | ||
581e13c1 | 446 | /* Generates an unique name that can be used for a varobj. */ |
8b93c638 JM |
447 | |
448 | char * | |
449 | varobj_gen_name (void) | |
450 | { | |
451 | static int id = 0; | |
e64d9b3d | 452 | char *obj_name; |
8b93c638 | 453 | |
581e13c1 | 454 | /* Generate a name for this object. */ |
8b93c638 | 455 | id++; |
b435e160 | 456 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 457 | |
e64d9b3d | 458 | return obj_name; |
8b93c638 JM |
459 | } |
460 | ||
61d8f275 JK |
461 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
462 | error if OBJNAME cannot be found. */ | |
8b93c638 JM |
463 | |
464 | struct varobj * | |
465 | varobj_get_handle (char *objname) | |
466 | { | |
467 | struct vlist *cv; | |
468 | const char *chp; | |
469 | unsigned int index = 0; | |
470 | unsigned int i = 1; | |
471 | ||
472 | for (chp = objname; *chp; chp++) | |
473 | { | |
474 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
475 | } | |
476 | ||
477 | cv = *(varobj_table + index); | |
478 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
479 | cv = cv->next; | |
480 | ||
481 | if (cv == NULL) | |
8a3fe4f8 | 482 | error (_("Variable object not found")); |
8b93c638 JM |
483 | |
484 | return cv->var; | |
485 | } | |
486 | ||
581e13c1 | 487 | /* Given the handle, return the name of the object. */ |
8b93c638 JM |
488 | |
489 | char * | |
490 | varobj_get_objname (struct varobj *var) | |
491 | { | |
492 | return var->obj_name; | |
493 | } | |
494 | ||
ca83fa81 SM |
495 | /* Given the handle, return the expression represented by the object. The |
496 | result must be freed by the caller. */ | |
8b93c638 JM |
497 | |
498 | char * | |
499 | varobj_get_expression (struct varobj *var) | |
500 | { | |
501 | return name_of_variable (var); | |
502 | } | |
503 | ||
504 | /* Deletes a varobj and all its children if only_children == 0, | |
3e43a32a MS |
505 | otherwise deletes only the children; returns a malloc'ed list of |
506 | all the (malloc'ed) names of the variables that have been deleted | |
581e13c1 | 507 | (NULL terminated). */ |
8b93c638 JM |
508 | |
509 | int | |
510 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
511 | { | |
512 | int delcount; | |
513 | int mycount; | |
514 | struct cpstack *result = NULL; | |
515 | char **cp; | |
516 | ||
581e13c1 | 517 | /* Initialize a stack for temporary results. */ |
8b93c638 JM |
518 | cppush (&result, NULL); |
519 | ||
520 | if (only_children) | |
581e13c1 | 521 | /* Delete only the variable children. */ |
8b93c638 JM |
522 | delcount = delete_variable (&result, var, 1 /* only the children */ ); |
523 | else | |
581e13c1 | 524 | /* Delete the variable and all its children. */ |
8b93c638 JM |
525 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); |
526 | ||
581e13c1 | 527 | /* We may have been asked to return a list of what has been deleted. */ |
8b93c638 JM |
528 | if (dellist != NULL) |
529 | { | |
530 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
531 | ||
532 | cp = *dellist; | |
533 | mycount = delcount; | |
534 | *cp = cppop (&result); | |
535 | while ((*cp != NULL) && (mycount > 0)) | |
536 | { | |
537 | mycount--; | |
538 | cp++; | |
539 | *cp = cppop (&result); | |
540 | } | |
541 | ||
542 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 543 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 544 | mycount); |
8b93c638 JM |
545 | } |
546 | ||
547 | return delcount; | |
548 | } | |
549 | ||
d8b65138 JK |
550 | #if HAVE_PYTHON |
551 | ||
b6313243 TT |
552 | /* Convenience function for varobj_set_visualizer. Instantiate a |
553 | pretty-printer for a given value. */ | |
554 | static PyObject * | |
555 | instantiate_pretty_printer (PyObject *constructor, struct value *value) | |
556 | { | |
b6313243 TT |
557 | PyObject *val_obj = NULL; |
558 | PyObject *printer; | |
b6313243 | 559 | |
b6313243 | 560 | val_obj = value_to_value_object (value); |
b6313243 TT |
561 | if (! val_obj) |
562 | return NULL; | |
563 | ||
564 | printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL); | |
565 | Py_DECREF (val_obj); | |
566 | return printer; | |
b6313243 TT |
567 | } |
568 | ||
d8b65138 JK |
569 | #endif |
570 | ||
581e13c1 | 571 | /* Set/Get variable object display format. */ |
8b93c638 JM |
572 | |
573 | enum varobj_display_formats | |
574 | varobj_set_display_format (struct varobj *var, | |
575 | enum varobj_display_formats format) | |
576 | { | |
577 | switch (format) | |
578 | { | |
579 | case FORMAT_NATURAL: | |
580 | case FORMAT_BINARY: | |
581 | case FORMAT_DECIMAL: | |
582 | case FORMAT_HEXADECIMAL: | |
583 | case FORMAT_OCTAL: | |
584 | var->format = format; | |
585 | break; | |
586 | ||
587 | default: | |
588 | var->format = variable_default_display (var); | |
589 | } | |
590 | ||
ae7d22a6 VP |
591 | if (varobj_value_is_changeable_p (var) |
592 | && var->value && !value_lazy (var->value)) | |
593 | { | |
6c761d9c | 594 | xfree (var->print_value); |
99ad9427 YQ |
595 | var->print_value = varobj_value_get_print_value (var->value, |
596 | var->format, var); | |
ae7d22a6 VP |
597 | } |
598 | ||
8b93c638 JM |
599 | return var->format; |
600 | } | |
601 | ||
602 | enum varobj_display_formats | |
603 | varobj_get_display_format (struct varobj *var) | |
604 | { | |
605 | return var->format; | |
606 | } | |
607 | ||
b6313243 TT |
608 | char * |
609 | varobj_get_display_hint (struct varobj *var) | |
610 | { | |
611 | char *result = NULL; | |
612 | ||
613 | #if HAVE_PYTHON | |
0646da15 TT |
614 | struct cleanup *back_to; |
615 | ||
616 | if (!gdb_python_initialized) | |
617 | return NULL; | |
618 | ||
619 | back_to = varobj_ensure_python_env (var); | |
d452c4bc | 620 | |
bb5ce47a YQ |
621 | if (var->dynamic->pretty_printer != NULL) |
622 | result = gdbpy_get_display_hint (var->dynamic->pretty_printer); | |
d452c4bc UW |
623 | |
624 | do_cleanups (back_to); | |
b6313243 TT |
625 | #endif |
626 | ||
627 | return result; | |
628 | } | |
629 | ||
0cc7d26f TT |
630 | /* Return true if the varobj has items after TO, false otherwise. */ |
631 | ||
632 | int | |
633 | varobj_has_more (struct varobj *var, int to) | |
634 | { | |
635 | if (VEC_length (varobj_p, var->children) > to) | |
636 | return 1; | |
637 | return ((to == -1 || VEC_length (varobj_p, var->children) == to) | |
bb5ce47a | 638 | && (var->dynamic->saved_item != NULL)); |
0cc7d26f TT |
639 | } |
640 | ||
c5b48eac VP |
641 | /* If the variable object is bound to a specific thread, that |
642 | is its evaluation can always be done in context of a frame | |
643 | inside that thread, returns GDB id of the thread -- which | |
581e13c1 | 644 | is always positive. Otherwise, returns -1. */ |
c5b48eac VP |
645 | int |
646 | varobj_get_thread_id (struct varobj *var) | |
647 | { | |
648 | if (var->root->valid_block && var->root->thread_id > 0) | |
649 | return var->root->thread_id; | |
650 | else | |
651 | return -1; | |
652 | } | |
653 | ||
25d5ea92 VP |
654 | void |
655 | varobj_set_frozen (struct varobj *var, int frozen) | |
656 | { | |
657 | /* When a variable is unfrozen, we don't fetch its value. | |
658 | The 'not_fetched' flag remains set, so next -var-update | |
659 | won't complain. | |
660 | ||
661 | We don't fetch the value, because for structures the client | |
662 | should do -var-update anyway. It would be bad to have different | |
663 | client-size logic for structure and other types. */ | |
664 | var->frozen = frozen; | |
665 | } | |
666 | ||
667 | int | |
668 | varobj_get_frozen (struct varobj *var) | |
669 | { | |
670 | return var->frozen; | |
671 | } | |
672 | ||
0cc7d26f TT |
673 | /* A helper function that restricts a range to what is actually |
674 | available in a VEC. This follows the usual rules for the meaning | |
675 | of FROM and TO -- if either is negative, the entire range is | |
676 | used. */ | |
677 | ||
99ad9427 YQ |
678 | void |
679 | varobj_restrict_range (VEC (varobj_p) *children, int *from, int *to) | |
0cc7d26f TT |
680 | { |
681 | if (*from < 0 || *to < 0) | |
682 | { | |
683 | *from = 0; | |
684 | *to = VEC_length (varobj_p, children); | |
685 | } | |
686 | else | |
687 | { | |
688 | if (*from > VEC_length (varobj_p, children)) | |
689 | *from = VEC_length (varobj_p, children); | |
690 | if (*to > VEC_length (varobj_p, children)) | |
691 | *to = VEC_length (varobj_p, children); | |
692 | if (*from > *to) | |
693 | *from = *to; | |
694 | } | |
695 | } | |
696 | ||
697 | /* A helper for update_dynamic_varobj_children that installs a new | |
698 | child when needed. */ | |
699 | ||
700 | static void | |
701 | install_dynamic_child (struct varobj *var, | |
702 | VEC (varobj_p) **changed, | |
8264ba82 | 703 | VEC (varobj_p) **type_changed, |
0cc7d26f TT |
704 | VEC (varobj_p) **new, |
705 | VEC (varobj_p) **unchanged, | |
706 | int *cchanged, | |
707 | int index, | |
5a2e0d6e | 708 | struct varobj_item *item) |
0cc7d26f TT |
709 | { |
710 | if (VEC_length (varobj_p, var->children) < index + 1) | |
711 | { | |
712 | /* There's no child yet. */ | |
5a2e0d6e | 713 | struct varobj *child = varobj_add_child (var, item); |
a109c7c1 | 714 | |
0cc7d26f TT |
715 | if (new) |
716 | { | |
717 | VEC_safe_push (varobj_p, *new, child); | |
718 | *cchanged = 1; | |
719 | } | |
720 | } | |
bf8793bb | 721 | else |
0cc7d26f TT |
722 | { |
723 | varobj_p existing = VEC_index (varobj_p, var->children, index); | |
5a2e0d6e | 724 | int type_updated = update_type_if_necessary (existing, item->value); |
bf8793bb | 725 | |
8264ba82 AG |
726 | if (type_updated) |
727 | { | |
728 | if (type_changed) | |
729 | VEC_safe_push (varobj_p, *type_changed, existing); | |
730 | } | |
5a2e0d6e | 731 | if (install_new_value (existing, item->value, 0)) |
0cc7d26f | 732 | { |
8264ba82 | 733 | if (!type_updated && changed) |
0cc7d26f TT |
734 | VEC_safe_push (varobj_p, *changed, existing); |
735 | } | |
8264ba82 | 736 | else if (!type_updated && unchanged) |
0cc7d26f TT |
737 | VEC_safe_push (varobj_p, *unchanged, existing); |
738 | } | |
739 | } | |
740 | ||
576ea091 YQ |
741 | #if HAVE_PYTHON |
742 | ||
0cc7d26f TT |
743 | static int |
744 | dynamic_varobj_has_child_method (struct varobj *var) | |
745 | { | |
746 | struct cleanup *back_to; | |
bb5ce47a | 747 | PyObject *printer = var->dynamic->pretty_printer; |
0cc7d26f TT |
748 | int result; |
749 | ||
0646da15 TT |
750 | if (!gdb_python_initialized) |
751 | return 0; | |
752 | ||
0cc7d26f TT |
753 | back_to = varobj_ensure_python_env (var); |
754 | result = PyObject_HasAttr (printer, gdbpy_children_cst); | |
755 | do_cleanups (back_to); | |
756 | return result; | |
757 | } | |
576ea091 | 758 | #endif |
0cc7d26f | 759 | |
e5250216 YQ |
760 | /* A factory for creating dynamic varobj's iterators. Returns an |
761 | iterator object suitable for iterating over VAR's children. */ | |
762 | ||
763 | static struct varobj_iter * | |
764 | varobj_get_iterator (struct varobj *var) | |
765 | { | |
576ea091 | 766 | #if HAVE_PYTHON |
e5250216 YQ |
767 | if (var->dynamic->pretty_printer) |
768 | return py_varobj_get_iterator (var, var->dynamic->pretty_printer); | |
576ea091 | 769 | #endif |
e5250216 YQ |
770 | |
771 | gdb_assert_not_reached (_("\ | |
772 | requested an iterator from a non-dynamic varobj")); | |
773 | } | |
774 | ||
827f100c YQ |
775 | /* Release and clear VAR's saved item, if any. */ |
776 | ||
777 | static void | |
778 | varobj_clear_saved_item (struct varobj_dynamic *var) | |
779 | { | |
780 | if (var->saved_item != NULL) | |
781 | { | |
782 | value_free (var->saved_item->value); | |
783 | xfree (var->saved_item); | |
784 | var->saved_item = NULL; | |
785 | } | |
786 | } | |
0cc7d26f | 787 | |
b6313243 TT |
788 | static int |
789 | update_dynamic_varobj_children (struct varobj *var, | |
790 | VEC (varobj_p) **changed, | |
8264ba82 | 791 | VEC (varobj_p) **type_changed, |
0cc7d26f TT |
792 | VEC (varobj_p) **new, |
793 | VEC (varobj_p) **unchanged, | |
794 | int *cchanged, | |
795 | int update_children, | |
796 | int from, | |
797 | int to) | |
b6313243 | 798 | { |
b6313243 | 799 | int i; |
b6313243 | 800 | |
b6313243 | 801 | *cchanged = 0; |
b6313243 | 802 | |
bb5ce47a | 803 | if (update_children || var->dynamic->child_iter == NULL) |
b6313243 | 804 | { |
e5250216 YQ |
805 | varobj_iter_delete (var->dynamic->child_iter); |
806 | var->dynamic->child_iter = varobj_get_iterator (var); | |
b6313243 | 807 | |
827f100c | 808 | varobj_clear_saved_item (var->dynamic); |
b6313243 | 809 | |
e5250216 | 810 | i = 0; |
b6313243 | 811 | |
bb5ce47a | 812 | if (var->dynamic->child_iter == NULL) |
827f100c | 813 | return 0; |
b6313243 | 814 | } |
0cc7d26f TT |
815 | else |
816 | i = VEC_length (varobj_p, var->children); | |
b6313243 | 817 | |
0cc7d26f TT |
818 | /* We ask for one extra child, so that MI can report whether there |
819 | are more children. */ | |
820 | for (; to < 0 || i < to + 1; ++i) | |
b6313243 | 821 | { |
827f100c | 822 | varobj_item *item; |
b6313243 | 823 | |
0cc7d26f | 824 | /* See if there was a leftover from last time. */ |
827f100c | 825 | if (var->dynamic->saved_item != NULL) |
0cc7d26f | 826 | { |
bb5ce47a YQ |
827 | item = var->dynamic->saved_item; |
828 | var->dynamic->saved_item = NULL; | |
0cc7d26f TT |
829 | } |
830 | else | |
a4c8e806 | 831 | { |
e5250216 | 832 | item = varobj_iter_next (var->dynamic->child_iter); |
827f100c YQ |
833 | /* Release vitem->value so its lifetime is not bound to the |
834 | execution of a command. */ | |
835 | if (item != NULL && item->value != NULL) | |
836 | release_value_or_incref (item->value); | |
a4c8e806 | 837 | } |
b6313243 | 838 | |
e5250216 YQ |
839 | if (item == NULL) |
840 | { | |
841 | /* Iteration is done. Remove iterator from VAR. */ | |
842 | varobj_iter_delete (var->dynamic->child_iter); | |
843 | var->dynamic->child_iter = NULL; | |
844 | break; | |
845 | } | |
0cc7d26f TT |
846 | /* We don't want to push the extra child on any report list. */ |
847 | if (to < 0 || i < to) | |
b6313243 | 848 | { |
0cc7d26f TT |
849 | int can_mention = from < 0 || i >= from; |
850 | ||
0cc7d26f | 851 | install_dynamic_child (var, can_mention ? changed : NULL, |
8264ba82 | 852 | can_mention ? type_changed : NULL, |
0cc7d26f TT |
853 | can_mention ? new : NULL, |
854 | can_mention ? unchanged : NULL, | |
5e5ac9a5 | 855 | can_mention ? cchanged : NULL, i, |
827f100c YQ |
856 | item); |
857 | ||
858 | xfree (item); | |
b6313243 | 859 | } |
0cc7d26f | 860 | else |
b6313243 | 861 | { |
bb5ce47a | 862 | var->dynamic->saved_item = item; |
b6313243 | 863 | |
0cc7d26f TT |
864 | /* We want to truncate the child list just before this |
865 | element. */ | |
866 | break; | |
867 | } | |
b6313243 TT |
868 | } |
869 | ||
870 | if (i < VEC_length (varobj_p, var->children)) | |
871 | { | |
0cc7d26f | 872 | int j; |
a109c7c1 | 873 | |
0cc7d26f TT |
874 | *cchanged = 1; |
875 | for (j = i; j < VEC_length (varobj_p, var->children); ++j) | |
876 | varobj_delete (VEC_index (varobj_p, var->children, j), NULL, 0); | |
877 | VEC_truncate (varobj_p, var->children, i); | |
b6313243 | 878 | } |
0cc7d26f TT |
879 | |
880 | /* If there are fewer children than requested, note that the list of | |
881 | children changed. */ | |
882 | if (to >= 0 && VEC_length (varobj_p, var->children) < to) | |
883 | *cchanged = 1; | |
884 | ||
b6313243 | 885 | var->num_children = VEC_length (varobj_p, var->children); |
b6313243 | 886 | |
b6313243 | 887 | return 1; |
b6313243 | 888 | } |
25d5ea92 | 889 | |
8b93c638 JM |
890 | int |
891 | varobj_get_num_children (struct varobj *var) | |
892 | { | |
893 | if (var->num_children == -1) | |
b6313243 | 894 | { |
31f628ae | 895 | if (varobj_is_dynamic_p (var)) |
0cc7d26f TT |
896 | { |
897 | int dummy; | |
898 | ||
899 | /* If we have a dynamic varobj, don't report -1 children. | |
900 | So, try to fetch some children first. */ | |
8264ba82 | 901 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, &dummy, |
0cc7d26f TT |
902 | 0, 0, 0); |
903 | } | |
904 | else | |
b6313243 TT |
905 | var->num_children = number_of_children (var); |
906 | } | |
8b93c638 | 907 | |
0cc7d26f | 908 | return var->num_children >= 0 ? var->num_children : 0; |
8b93c638 JM |
909 | } |
910 | ||
911 | /* Creates a list of the immediate children of a variable object; | |
581e13c1 | 912 | the return code is the number of such children or -1 on error. */ |
8b93c638 | 913 | |
d56d46f5 | 914 | VEC (varobj_p)* |
0cc7d26f | 915 | varobj_list_children (struct varobj *var, int *from, int *to) |
8b93c638 | 916 | { |
8b93c638 | 917 | char *name; |
b6313243 TT |
918 | int i, children_changed; |
919 | ||
bb5ce47a | 920 | var->dynamic->children_requested = 1; |
b6313243 | 921 | |
31f628ae | 922 | if (varobj_is_dynamic_p (var)) |
0cc7d26f | 923 | { |
b6313243 TT |
924 | /* This, in theory, can result in the number of children changing without |
925 | frontend noticing. But well, calling -var-list-children on the same | |
926 | varobj twice is not something a sane frontend would do. */ | |
8264ba82 AG |
927 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, |
928 | &children_changed, 0, 0, *to); | |
99ad9427 | 929 | varobj_restrict_range (var->children, from, to); |
0cc7d26f TT |
930 | return var->children; |
931 | } | |
8b93c638 | 932 | |
8b93c638 JM |
933 | if (var->num_children == -1) |
934 | var->num_children = number_of_children (var); | |
935 | ||
74a44383 DJ |
936 | /* If that failed, give up. */ |
937 | if (var->num_children == -1) | |
d56d46f5 | 938 | return var->children; |
74a44383 | 939 | |
28335dcc VP |
940 | /* If we're called when the list of children is not yet initialized, |
941 | allocate enough elements in it. */ | |
942 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
943 | VEC_safe_push (varobj_p, var->children, NULL); | |
944 | ||
8b93c638 JM |
945 | for (i = 0; i < var->num_children; i++) |
946 | { | |
d56d46f5 | 947 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
948 | |
949 | if (existing == NULL) | |
950 | { | |
951 | /* Either it's the first call to varobj_list_children for | |
952 | this variable object, and the child was never created, | |
953 | or it was explicitly deleted by the client. */ | |
954 | name = name_of_child (var, i); | |
955 | existing = create_child (var, i, name); | |
956 | VEC_replace (varobj_p, var->children, i, existing); | |
957 | } | |
8b93c638 JM |
958 | } |
959 | ||
99ad9427 | 960 | varobj_restrict_range (var->children, from, to); |
d56d46f5 | 961 | return var->children; |
8b93c638 JM |
962 | } |
963 | ||
b6313243 | 964 | static struct varobj * |
5a2e0d6e | 965 | varobj_add_child (struct varobj *var, struct varobj_item *item) |
b6313243 | 966 | { |
5a2e0d6e | 967 | varobj_p v = create_child_with_value (var, |
b6313243 | 968 | VEC_length (varobj_p, var->children), |
5a2e0d6e | 969 | item); |
a109c7c1 | 970 | |
b6313243 | 971 | VEC_safe_push (varobj_p, var->children, v); |
b6313243 TT |
972 | return v; |
973 | } | |
974 | ||
8b93c638 | 975 | /* Obtain the type of an object Variable as a string similar to the one gdb |
afa269ae SM |
976 | prints on the console. The caller is responsible for freeing the string. |
977 | */ | |
8b93c638 JM |
978 | |
979 | char * | |
980 | varobj_get_type (struct varobj *var) | |
981 | { | |
8ab91b96 | 982 | /* For the "fake" variables, do not return a type. (Its type is |
8756216b DP |
983 | NULL, too.) |
984 | Do not return a type for invalid variables as well. */ | |
985 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
986 | return NULL; |
987 | ||
1a4300e9 | 988 | return type_to_string (var->type); |
8b93c638 JM |
989 | } |
990 | ||
1ecb4ee0 DJ |
991 | /* Obtain the type of an object variable. */ |
992 | ||
993 | struct type * | |
994 | varobj_get_gdb_type (struct varobj *var) | |
995 | { | |
996 | return var->type; | |
997 | } | |
998 | ||
85254831 KS |
999 | /* Is VAR a path expression parent, i.e., can it be used to construct |
1000 | a valid path expression? */ | |
1001 | ||
1002 | static int | |
1003 | is_path_expr_parent (struct varobj *var) | |
1004 | { | |
9a9a7608 AB |
1005 | gdb_assert (var->root->lang_ops->is_path_expr_parent != NULL); |
1006 | return var->root->lang_ops->is_path_expr_parent (var); | |
1007 | } | |
85254831 | 1008 | |
9a9a7608 AB |
1009 | /* Is VAR a path expression parent, i.e., can it be used to construct |
1010 | a valid path expression? By default we assume any VAR can be a path | |
1011 | parent. */ | |
85254831 | 1012 | |
9a9a7608 AB |
1013 | int |
1014 | varobj_default_is_path_expr_parent (struct varobj *var) | |
1015 | { | |
1016 | return 1; | |
85254831 KS |
1017 | } |
1018 | ||
1019 | /* Return the path expression parent for VAR. */ | |
1020 | ||
99ad9427 YQ |
1021 | struct varobj * |
1022 | varobj_get_path_expr_parent (struct varobj *var) | |
85254831 KS |
1023 | { |
1024 | struct varobj *parent = var; | |
1025 | ||
1026 | while (!is_root_p (parent) && !is_path_expr_parent (parent)) | |
1027 | parent = parent->parent; | |
1028 | ||
1029 | return parent; | |
1030 | } | |
1031 | ||
02142340 VP |
1032 | /* Return a pointer to the full rooted expression of varobj VAR. |
1033 | If it has not been computed yet, compute it. */ | |
1034 | char * | |
1035 | varobj_get_path_expr (struct varobj *var) | |
1036 | { | |
1037 | if (var->path_expr != NULL) | |
1038 | return var->path_expr; | |
1039 | else | |
1040 | { | |
1041 | /* For root varobjs, we initialize path_expr | |
1042 | when creating varobj, so here it should be | |
1043 | child varobj. */ | |
1044 | gdb_assert (!is_root_p (var)); | |
ca20d462 | 1045 | return (*var->root->lang_ops->path_expr_of_child) (var); |
02142340 VP |
1046 | } |
1047 | } | |
1048 | ||
fa4d0c40 | 1049 | const struct language_defn * |
8b93c638 JM |
1050 | varobj_get_language (struct varobj *var) |
1051 | { | |
fa4d0c40 | 1052 | return var->root->exp->language_defn; |
8b93c638 JM |
1053 | } |
1054 | ||
1055 | int | |
1056 | varobj_get_attributes (struct varobj *var) | |
1057 | { | |
1058 | int attributes = 0; | |
1059 | ||
340a7723 | 1060 | if (varobj_editable_p (var)) |
581e13c1 | 1061 | /* FIXME: define masks for attributes. */ |
8b93c638 JM |
1062 | attributes |= 0x00000001; /* Editable */ |
1063 | ||
1064 | return attributes; | |
1065 | } | |
1066 | ||
cde5ef40 YQ |
1067 | /* Return true if VAR is a dynamic varobj. */ |
1068 | ||
0cc7d26f | 1069 | int |
cde5ef40 | 1070 | varobj_is_dynamic_p (struct varobj *var) |
0cc7d26f | 1071 | { |
bb5ce47a | 1072 | return var->dynamic->pretty_printer != NULL; |
0cc7d26f TT |
1073 | } |
1074 | ||
de051565 MK |
1075 | char * |
1076 | varobj_get_formatted_value (struct varobj *var, | |
1077 | enum varobj_display_formats format) | |
1078 | { | |
1079 | return my_value_of_variable (var, format); | |
1080 | } | |
1081 | ||
8b93c638 JM |
1082 | char * |
1083 | varobj_get_value (struct varobj *var) | |
1084 | { | |
de051565 | 1085 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
1086 | } |
1087 | ||
1088 | /* Set the value of an object variable (if it is editable) to the | |
581e13c1 MS |
1089 | value of the given expression. */ |
1090 | /* Note: Invokes functions that can call error(). */ | |
8b93c638 JM |
1091 | |
1092 | int | |
1093 | varobj_set_value (struct varobj *var, char *expression) | |
1094 | { | |
34365054 | 1095 | struct value *val = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1096 | /* The argument "expression" contains the variable's new value. |
581e13c1 MS |
1097 | We need to first construct a legal expression for this -- ugh! */ |
1098 | /* Does this cover all the bases? */ | |
8b93c638 | 1099 | struct expression *exp; |
34365054 | 1100 | struct value *value = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1101 | int saved_input_radix = input_radix; |
bbc13ae3 | 1102 | const char *s = expression; |
8e7b59a5 | 1103 | volatile struct gdb_exception except; |
8b93c638 | 1104 | |
340a7723 | 1105 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 1106 | |
581e13c1 | 1107 | input_radix = 10; /* ALWAYS reset to decimal temporarily. */ |
1bb9788d | 1108 | exp = parse_exp_1 (&s, 0, 0, 0); |
8e7b59a5 KS |
1109 | TRY_CATCH (except, RETURN_MASK_ERROR) |
1110 | { | |
1111 | value = evaluate_expression (exp); | |
1112 | } | |
1113 | ||
1114 | if (except.reason < 0) | |
340a7723 | 1115 | { |
581e13c1 | 1116 | /* We cannot proceed without a valid expression. */ |
340a7723 NR |
1117 | xfree (exp); |
1118 | return 0; | |
8b93c638 JM |
1119 | } |
1120 | ||
340a7723 NR |
1121 | /* All types that are editable must also be changeable. */ |
1122 | gdb_assert (varobj_value_is_changeable_p (var)); | |
1123 | ||
1124 | /* The value of a changeable variable object must not be lazy. */ | |
1125 | gdb_assert (!value_lazy (var->value)); | |
1126 | ||
1127 | /* Need to coerce the input. We want to check if the | |
1128 | value of the variable object will be different | |
1129 | after assignment, and the first thing value_assign | |
1130 | does is coerce the input. | |
1131 | For example, if we are assigning an array to a pointer variable we | |
b021a221 | 1132 | should compare the pointer with the array's address, not with the |
340a7723 NR |
1133 | array's content. */ |
1134 | value = coerce_array (value); | |
1135 | ||
8e7b59a5 KS |
1136 | /* The new value may be lazy. value_assign, or |
1137 | rather value_contents, will take care of this. */ | |
1138 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
1139 | { | |
1140 | val = value_assign (var->value, value); | |
1141 | } | |
1142 | ||
1143 | if (except.reason < 0) | |
340a7723 | 1144 | return 0; |
8e7b59a5 | 1145 | |
340a7723 NR |
1146 | /* If the value has changed, record it, so that next -var-update can |
1147 | report this change. If a variable had a value of '1', we've set it | |
1148 | to '333' and then set again to '1', when -var-update will report this | |
1149 | variable as changed -- because the first assignment has set the | |
1150 | 'updated' flag. There's no need to optimize that, because return value | |
1151 | of -var-update should be considered an approximation. */ | |
581e13c1 | 1152 | var->updated = install_new_value (var, val, 0 /* Compare values. */); |
340a7723 NR |
1153 | input_radix = saved_input_radix; |
1154 | return 1; | |
8b93c638 JM |
1155 | } |
1156 | ||
0cc7d26f TT |
1157 | #if HAVE_PYTHON |
1158 | ||
1159 | /* A helper function to install a constructor function and visualizer | |
bb5ce47a | 1160 | in a varobj_dynamic. */ |
0cc7d26f TT |
1161 | |
1162 | static void | |
bb5ce47a | 1163 | install_visualizer (struct varobj_dynamic *var, PyObject *constructor, |
0cc7d26f TT |
1164 | PyObject *visualizer) |
1165 | { | |
1166 | Py_XDECREF (var->constructor); | |
1167 | var->constructor = constructor; | |
1168 | ||
1169 | Py_XDECREF (var->pretty_printer); | |
1170 | var->pretty_printer = visualizer; | |
1171 | ||
e5250216 | 1172 | varobj_iter_delete (var->child_iter); |
0cc7d26f TT |
1173 | var->child_iter = NULL; |
1174 | } | |
1175 | ||
1176 | /* Install the default visualizer for VAR. */ | |
1177 | ||
1178 | static void | |
1179 | install_default_visualizer (struct varobj *var) | |
1180 | { | |
d65aec65 PM |
1181 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1182 | if (CPLUS_FAKE_CHILD (var)) | |
1183 | return; | |
1184 | ||
0cc7d26f TT |
1185 | if (pretty_printing) |
1186 | { | |
1187 | PyObject *pretty_printer = NULL; | |
1188 | ||
1189 | if (var->value) | |
1190 | { | |
1191 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value); | |
1192 | if (! pretty_printer) | |
1193 | { | |
1194 | gdbpy_print_stack (); | |
1195 | error (_("Cannot instantiate printer for default visualizer")); | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | if (pretty_printer == Py_None) | |
1200 | { | |
1201 | Py_DECREF (pretty_printer); | |
1202 | pretty_printer = NULL; | |
1203 | } | |
1204 | ||
bb5ce47a | 1205 | install_visualizer (var->dynamic, NULL, pretty_printer); |
0cc7d26f TT |
1206 | } |
1207 | } | |
1208 | ||
1209 | /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to | |
1210 | make a new object. */ | |
1211 | ||
1212 | static void | |
1213 | construct_visualizer (struct varobj *var, PyObject *constructor) | |
1214 | { | |
1215 | PyObject *pretty_printer; | |
1216 | ||
d65aec65 PM |
1217 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1218 | if (CPLUS_FAKE_CHILD (var)) | |
1219 | return; | |
1220 | ||
0cc7d26f TT |
1221 | Py_INCREF (constructor); |
1222 | if (constructor == Py_None) | |
1223 | pretty_printer = NULL; | |
1224 | else | |
1225 | { | |
1226 | pretty_printer = instantiate_pretty_printer (constructor, var->value); | |
1227 | if (! pretty_printer) | |
1228 | { | |
1229 | gdbpy_print_stack (); | |
1230 | Py_DECREF (constructor); | |
1231 | constructor = Py_None; | |
1232 | Py_INCREF (constructor); | |
1233 | } | |
1234 | ||
1235 | if (pretty_printer == Py_None) | |
1236 | { | |
1237 | Py_DECREF (pretty_printer); | |
1238 | pretty_printer = NULL; | |
1239 | } | |
1240 | } | |
1241 | ||
bb5ce47a | 1242 | install_visualizer (var->dynamic, constructor, pretty_printer); |
0cc7d26f TT |
1243 | } |
1244 | ||
1245 | #endif /* HAVE_PYTHON */ | |
1246 | ||
1247 | /* A helper function for install_new_value. This creates and installs | |
1248 | a visualizer for VAR, if appropriate. */ | |
1249 | ||
1250 | static void | |
1251 | install_new_value_visualizer (struct varobj *var) | |
1252 | { | |
1253 | #if HAVE_PYTHON | |
1254 | /* If the constructor is None, then we want the raw value. If VAR | |
1255 | does not have a value, just skip this. */ | |
0646da15 TT |
1256 | if (!gdb_python_initialized) |
1257 | return; | |
1258 | ||
bb5ce47a | 1259 | if (var->dynamic->constructor != Py_None && var->value != NULL) |
0cc7d26f TT |
1260 | { |
1261 | struct cleanup *cleanup; | |
0cc7d26f TT |
1262 | |
1263 | cleanup = varobj_ensure_python_env (var); | |
1264 | ||
bb5ce47a | 1265 | if (var->dynamic->constructor == NULL) |
0cc7d26f TT |
1266 | install_default_visualizer (var); |
1267 | else | |
bb5ce47a | 1268 | construct_visualizer (var, var->dynamic->constructor); |
0cc7d26f TT |
1269 | |
1270 | do_cleanups (cleanup); | |
1271 | } | |
1272 | #else | |
1273 | /* Do nothing. */ | |
1274 | #endif | |
1275 | } | |
1276 | ||
8264ba82 AG |
1277 | /* When using RTTI to determine variable type it may be changed in runtime when |
1278 | the variable value is changed. This function checks whether type of varobj | |
1279 | VAR will change when a new value NEW_VALUE is assigned and if it is so | |
1280 | updates the type of VAR. */ | |
1281 | ||
1282 | static int | |
1283 | update_type_if_necessary (struct varobj *var, struct value *new_value) | |
1284 | { | |
1285 | if (new_value) | |
1286 | { | |
1287 | struct value_print_options opts; | |
1288 | ||
1289 | get_user_print_options (&opts); | |
1290 | if (opts.objectprint) | |
1291 | { | |
1292 | struct type *new_type; | |
1293 | char *curr_type_str, *new_type_str; | |
afa269ae | 1294 | int type_name_changed; |
8264ba82 AG |
1295 | |
1296 | new_type = value_actual_type (new_value, 0, 0); | |
1297 | new_type_str = type_to_string (new_type); | |
1298 | curr_type_str = varobj_get_type (var); | |
afa269ae SM |
1299 | type_name_changed = strcmp (curr_type_str, new_type_str) != 0; |
1300 | xfree (curr_type_str); | |
1301 | xfree (new_type_str); | |
1302 | ||
1303 | if (type_name_changed) | |
8264ba82 AG |
1304 | { |
1305 | var->type = new_type; | |
1306 | ||
1307 | /* This information may be not valid for a new type. */ | |
1308 | varobj_delete (var, NULL, 1); | |
1309 | VEC_free (varobj_p, var->children); | |
1310 | var->num_children = -1; | |
1311 | return 1; | |
1312 | } | |
1313 | } | |
1314 | } | |
1315 | ||
1316 | return 0; | |
1317 | } | |
1318 | ||
acd65feb VP |
1319 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
1320 | this is the first assignement after the variable object was just | |
1321 | created, or changed type. In that case, just assign the value | |
1322 | and return 0. | |
581e13c1 MS |
1323 | Otherwise, assign the new value, and return 1 if the value is |
1324 | different from the current one, 0 otherwise. The comparison is | |
1325 | done on textual representation of value. Therefore, some types | |
1326 | need not be compared. E.g. for structures the reported value is | |
1327 | always "{...}", so no comparison is necessary here. If the old | |
1328 | value was NULL and new one is not, or vice versa, we always return 1. | |
b26ed50d VP |
1329 | |
1330 | The VALUE parameter should not be released -- the function will | |
1331 | take care of releasing it when needed. */ | |
acd65feb VP |
1332 | static int |
1333 | install_new_value (struct varobj *var, struct value *value, int initial) | |
1334 | { | |
1335 | int changeable; | |
1336 | int need_to_fetch; | |
1337 | int changed = 0; | |
25d5ea92 | 1338 | int intentionally_not_fetched = 0; |
7a4d50bf | 1339 | char *print_value = NULL; |
acd65feb | 1340 | |
acd65feb | 1341 | /* We need to know the varobj's type to decide if the value should |
3e43a32a | 1342 | be fetched or not. C++ fake children (public/protected/private) |
581e13c1 | 1343 | don't have a type. */ |
acd65feb | 1344 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); |
b2c2bd75 | 1345 | changeable = varobj_value_is_changeable_p (var); |
b6313243 TT |
1346 | |
1347 | /* If the type has custom visualizer, we consider it to be always | |
581e13c1 | 1348 | changeable. FIXME: need to make sure this behaviour will not |
b6313243 | 1349 | mess up read-sensitive values. */ |
bb5ce47a | 1350 | if (var->dynamic->pretty_printer != NULL) |
b6313243 TT |
1351 | changeable = 1; |
1352 | ||
acd65feb VP |
1353 | need_to_fetch = changeable; |
1354 | ||
b26ed50d VP |
1355 | /* We are not interested in the address of references, and given |
1356 | that in C++ a reference is not rebindable, it cannot | |
1357 | meaningfully change. So, get hold of the real value. */ | |
1358 | if (value) | |
0cc7d26f | 1359 | value = coerce_ref (value); |
b26ed50d | 1360 | |
acd65feb VP |
1361 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1362 | /* For unions, we need to fetch the value implicitly because | |
1363 | of implementation of union member fetch. When gdb | |
1364 | creates a value for a field and the value of the enclosing | |
1365 | structure is not lazy, it immediately copies the necessary | |
1366 | bytes from the enclosing values. If the enclosing value is | |
1367 | lazy, the call to value_fetch_lazy on the field will read | |
1368 | the data from memory. For unions, that means we'll read the | |
1369 | same memory more than once, which is not desirable. So | |
1370 | fetch now. */ | |
1371 | need_to_fetch = 1; | |
1372 | ||
1373 | /* The new value might be lazy. If the type is changeable, | |
1374 | that is we'll be comparing values of this type, fetch the | |
1375 | value now. Otherwise, on the next update the old value | |
1376 | will be lazy, which means we've lost that old value. */ | |
1377 | if (need_to_fetch && value && value_lazy (value)) | |
1378 | { | |
25d5ea92 VP |
1379 | struct varobj *parent = var->parent; |
1380 | int frozen = var->frozen; | |
a109c7c1 | 1381 | |
25d5ea92 VP |
1382 | for (; !frozen && parent; parent = parent->parent) |
1383 | frozen |= parent->frozen; | |
1384 | ||
1385 | if (frozen && initial) | |
1386 | { | |
1387 | /* For variables that are frozen, or are children of frozen | |
1388 | variables, we don't do fetch on initial assignment. | |
1389 | For non-initial assignemnt we do the fetch, since it means we're | |
1390 | explicitly asked to compare the new value with the old one. */ | |
1391 | intentionally_not_fetched = 1; | |
1392 | } | |
8e7b59a5 | 1393 | else |
acd65feb | 1394 | { |
8e7b59a5 KS |
1395 | volatile struct gdb_exception except; |
1396 | ||
1397 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
1398 | { | |
1399 | value_fetch_lazy (value); | |
1400 | } | |
1401 | ||
1402 | if (except.reason < 0) | |
1403 | { | |
1404 | /* Set the value to NULL, so that for the next -var-update, | |
1405 | we don't try to compare the new value with this value, | |
1406 | that we couldn't even read. */ | |
1407 | value = NULL; | |
1408 | } | |
acd65feb | 1409 | } |
acd65feb VP |
1410 | } |
1411 | ||
e848a8a5 TT |
1412 | /* Get a reference now, before possibly passing it to any Python |
1413 | code that might release it. */ | |
1414 | if (value != NULL) | |
1415 | value_incref (value); | |
b6313243 | 1416 | |
7a4d50bf VP |
1417 | /* Below, we'll be comparing string rendering of old and new |
1418 | values. Don't get string rendering if the value is | |
1419 | lazy -- if it is, the code above has decided that the value | |
1420 | should not be fetched. */ | |
bb5ce47a YQ |
1421 | if (value != NULL && !value_lazy (value) |
1422 | && var->dynamic->pretty_printer == NULL) | |
99ad9427 | 1423 | print_value = varobj_value_get_print_value (value, var->format, var); |
7a4d50bf | 1424 | |
acd65feb VP |
1425 | /* If the type is changeable, compare the old and the new values. |
1426 | If this is the initial assignment, we don't have any old value | |
1427 | to compare with. */ | |
7a4d50bf | 1428 | if (!initial && changeable) |
acd65feb | 1429 | { |
3e43a32a MS |
1430 | /* If the value of the varobj was changed by -var-set-value, |
1431 | then the value in the varobj and in the target is the same. | |
1432 | However, that value is different from the value that the | |
581e13c1 | 1433 | varobj had after the previous -var-update. So need to the |
3e43a32a | 1434 | varobj as changed. */ |
acd65feb | 1435 | if (var->updated) |
57e66780 | 1436 | { |
57e66780 DJ |
1437 | changed = 1; |
1438 | } | |
bb5ce47a | 1439 | else if (var->dynamic->pretty_printer == NULL) |
acd65feb VP |
1440 | { |
1441 | /* Try to compare the values. That requires that both | |
1442 | values are non-lazy. */ | |
25d5ea92 VP |
1443 | if (var->not_fetched && value_lazy (var->value)) |
1444 | { | |
1445 | /* This is a frozen varobj and the value was never read. | |
1446 | Presumably, UI shows some "never read" indicator. | |
1447 | Now that we've fetched the real value, we need to report | |
1448 | this varobj as changed so that UI can show the real | |
1449 | value. */ | |
1450 | changed = 1; | |
1451 | } | |
1452 | else if (var->value == NULL && value == NULL) | |
581e13c1 | 1453 | /* Equal. */ |
acd65feb VP |
1454 | ; |
1455 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1456 | { |
57e66780 DJ |
1457 | changed = 1; |
1458 | } | |
acd65feb VP |
1459 | else |
1460 | { | |
1461 | gdb_assert (!value_lazy (var->value)); | |
1462 | gdb_assert (!value_lazy (value)); | |
85265413 | 1463 | |
57e66780 | 1464 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1465 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1466 | changed = 1; |
acd65feb VP |
1467 | } |
1468 | } | |
1469 | } | |
85265413 | 1470 | |
ee342b23 VP |
1471 | if (!initial && !changeable) |
1472 | { | |
1473 | /* For values that are not changeable, we don't compare the values. | |
1474 | However, we want to notice if a value was not NULL and now is NULL, | |
1475 | or vise versa, so that we report when top-level varobjs come in scope | |
1476 | and leave the scope. */ | |
1477 | changed = (var->value != NULL) != (value != NULL); | |
1478 | } | |
1479 | ||
acd65feb | 1480 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1481 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1482 | value_free (var->value); |
1483 | var->value = value; | |
25d5ea92 VP |
1484 | if (value && value_lazy (value) && intentionally_not_fetched) |
1485 | var->not_fetched = 1; | |
1486 | else | |
1487 | var->not_fetched = 0; | |
acd65feb | 1488 | var->updated = 0; |
85265413 | 1489 | |
0cc7d26f TT |
1490 | install_new_value_visualizer (var); |
1491 | ||
1492 | /* If we installed a pretty-printer, re-compare the printed version | |
1493 | to see if the variable changed. */ | |
bb5ce47a | 1494 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f TT |
1495 | { |
1496 | xfree (print_value); | |
99ad9427 YQ |
1497 | print_value = varobj_value_get_print_value (var->value, var->format, |
1498 | var); | |
e8f781e2 TT |
1499 | if ((var->print_value == NULL && print_value != NULL) |
1500 | || (var->print_value != NULL && print_value == NULL) | |
1501 | || (var->print_value != NULL && print_value != NULL | |
1502 | && strcmp (var->print_value, print_value) != 0)) | |
0cc7d26f TT |
1503 | changed = 1; |
1504 | } | |
1505 | if (var->print_value) | |
1506 | xfree (var->print_value); | |
1507 | var->print_value = print_value; | |
1508 | ||
b26ed50d | 1509 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1510 | |
1511 | return changed; | |
1512 | } | |
acd65feb | 1513 | |
0cc7d26f TT |
1514 | /* Return the requested range for a varobj. VAR is the varobj. FROM |
1515 | and TO are out parameters; *FROM and *TO will be set to the | |
1516 | selected sub-range of VAR. If no range was selected using | |
1517 | -var-set-update-range, then both will be -1. */ | |
1518 | void | |
1519 | varobj_get_child_range (struct varobj *var, int *from, int *to) | |
b6313243 | 1520 | { |
0cc7d26f TT |
1521 | *from = var->from; |
1522 | *to = var->to; | |
b6313243 TT |
1523 | } |
1524 | ||
0cc7d26f TT |
1525 | /* Set the selected sub-range of children of VAR to start at index |
1526 | FROM and end at index TO. If either FROM or TO is less than zero, | |
1527 | this is interpreted as a request for all children. */ | |
1528 | void | |
1529 | varobj_set_child_range (struct varobj *var, int from, int to) | |
b6313243 | 1530 | { |
0cc7d26f TT |
1531 | var->from = from; |
1532 | var->to = to; | |
b6313243 TT |
1533 | } |
1534 | ||
1535 | void | |
1536 | varobj_set_visualizer (struct varobj *var, const char *visualizer) | |
1537 | { | |
1538 | #if HAVE_PYTHON | |
34fa1d9d MS |
1539 | PyObject *mainmod, *globals, *constructor; |
1540 | struct cleanup *back_to; | |
b6313243 | 1541 | |
0646da15 TT |
1542 | if (!gdb_python_initialized) |
1543 | return; | |
1544 | ||
d452c4bc | 1545 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
1546 | |
1547 | mainmod = PyImport_AddModule ("__main__"); | |
1548 | globals = PyModule_GetDict (mainmod); | |
1549 | Py_INCREF (globals); | |
1550 | make_cleanup_py_decref (globals); | |
1551 | ||
1552 | constructor = PyRun_String (visualizer, Py_eval_input, globals, globals); | |
b6313243 | 1553 | |
0cc7d26f | 1554 | if (! constructor) |
b6313243 TT |
1555 | { |
1556 | gdbpy_print_stack (); | |
da1f2771 | 1557 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
b6313243 TT |
1558 | } |
1559 | ||
0cc7d26f TT |
1560 | construct_visualizer (var, constructor); |
1561 | Py_XDECREF (constructor); | |
b6313243 | 1562 | |
0cc7d26f TT |
1563 | /* If there are any children now, wipe them. */ |
1564 | varobj_delete (var, NULL, 1 /* children only */); | |
1565 | var->num_children = -1; | |
b6313243 TT |
1566 | |
1567 | do_cleanups (back_to); | |
1568 | #else | |
da1f2771 | 1569 | error (_("Python support required")); |
b6313243 TT |
1570 | #endif |
1571 | } | |
1572 | ||
7a290c40 JB |
1573 | /* If NEW_VALUE is the new value of the given varobj (var), return |
1574 | non-zero if var has mutated. In other words, if the type of | |
1575 | the new value is different from the type of the varobj's old | |
1576 | value. | |
1577 | ||
1578 | NEW_VALUE may be NULL, if the varobj is now out of scope. */ | |
1579 | ||
1580 | static int | |
1581 | varobj_value_has_mutated (struct varobj *var, struct value *new_value, | |
1582 | struct type *new_type) | |
1583 | { | |
1584 | /* If we haven't previously computed the number of children in var, | |
1585 | it does not matter from the front-end's perspective whether | |
1586 | the type has mutated or not. For all intents and purposes, | |
1587 | it has not mutated. */ | |
1588 | if (var->num_children < 0) | |
1589 | return 0; | |
1590 | ||
ca20d462 | 1591 | if (var->root->lang_ops->value_has_mutated) |
8776cfe9 JB |
1592 | { |
1593 | /* The varobj module, when installing new values, explicitly strips | |
1594 | references, saying that we're not interested in those addresses. | |
1595 | But detection of mutation happens before installing the new | |
1596 | value, so our value may be a reference that we need to strip | |
1597 | in order to remain consistent. */ | |
1598 | if (new_value != NULL) | |
1599 | new_value = coerce_ref (new_value); | |
1600 | return var->root->lang_ops->value_has_mutated (var, new_value, new_type); | |
1601 | } | |
7a290c40 JB |
1602 | else |
1603 | return 0; | |
1604 | } | |
1605 | ||
8b93c638 JM |
1606 | /* Update the values for a variable and its children. This is a |
1607 | two-pronged attack. First, re-parse the value for the root's | |
1608 | expression to see if it's changed. Then go all the way | |
1609 | through its children, reconstructing them and noting if they've | |
1610 | changed. | |
1611 | ||
25d5ea92 VP |
1612 | The EXPLICIT parameter specifies if this call is result |
1613 | of MI request to update this specific variable, or | |
581e13c1 | 1614 | result of implicit -var-update *. For implicit request, we don't |
25d5ea92 | 1615 | update frozen variables. |
705da579 | 1616 | |
581e13c1 | 1617 | NOTE: This function may delete the caller's varobj. If it |
8756216b DP |
1618 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1619 | to point to the new varobj. */ | |
8b93c638 | 1620 | |
1417b39d JB |
1621 | VEC(varobj_update_result) * |
1622 | varobj_update (struct varobj **varp, int explicit) | |
8b93c638 | 1623 | { |
25d5ea92 | 1624 | int type_changed = 0; |
8b93c638 | 1625 | int i; |
30b28db1 | 1626 | struct value *new; |
b6313243 | 1627 | VEC (varobj_update_result) *stack = NULL; |
f7f9ae2c | 1628 | VEC (varobj_update_result) *result = NULL; |
8b93c638 | 1629 | |
25d5ea92 VP |
1630 | /* Frozen means frozen -- we don't check for any change in |
1631 | this varobj, including its going out of scope, or | |
1632 | changing type. One use case for frozen varobjs is | |
1633 | retaining previously evaluated expressions, and we don't | |
1634 | want them to be reevaluated at all. */ | |
1635 | if (!explicit && (*varp)->frozen) | |
f7f9ae2c | 1636 | return result; |
8756216b DP |
1637 | |
1638 | if (!(*varp)->root->is_valid) | |
f7f9ae2c | 1639 | { |
cfce2ea2 | 1640 | varobj_update_result r = {0}; |
a109c7c1 | 1641 | |
cfce2ea2 | 1642 | r.varobj = *varp; |
f7f9ae2c VP |
1643 | r.status = VAROBJ_INVALID; |
1644 | VEC_safe_push (varobj_update_result, result, &r); | |
1645 | return result; | |
1646 | } | |
8b93c638 | 1647 | |
25d5ea92 | 1648 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1649 | { |
cfce2ea2 | 1650 | varobj_update_result r = {0}; |
a109c7c1 | 1651 | |
cfce2ea2 | 1652 | r.varobj = *varp; |
f7f9ae2c VP |
1653 | r.status = VAROBJ_IN_SCOPE; |
1654 | ||
581e13c1 | 1655 | /* Update the root variable. value_of_root can return NULL |
25d5ea92 | 1656 | if the variable is no longer around, i.e. we stepped out of |
581e13c1 | 1657 | the frame in which a local existed. We are letting the |
25d5ea92 VP |
1658 | value_of_root variable dispose of the varobj if the type |
1659 | has changed. */ | |
25d5ea92 | 1660 | new = value_of_root (varp, &type_changed); |
8264ba82 AG |
1661 | if (update_type_if_necessary(*varp, new)) |
1662 | type_changed = 1; | |
f7f9ae2c | 1663 | r.varobj = *varp; |
f7f9ae2c | 1664 | r.type_changed = type_changed; |
ea56f9c2 | 1665 | if (install_new_value ((*varp), new, type_changed)) |
f7f9ae2c | 1666 | r.changed = 1; |
ea56f9c2 | 1667 | |
25d5ea92 | 1668 | if (new == NULL) |
f7f9ae2c | 1669 | r.status = VAROBJ_NOT_IN_SCOPE; |
b6313243 | 1670 | r.value_installed = 1; |
f7f9ae2c VP |
1671 | |
1672 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
b6313243 | 1673 | { |
0b4bc29a JK |
1674 | if (r.type_changed || r.changed) |
1675 | VEC_safe_push (varobj_update_result, result, &r); | |
b6313243 TT |
1676 | return result; |
1677 | } | |
1678 | ||
1679 | VEC_safe_push (varobj_update_result, stack, &r); | |
1680 | } | |
1681 | else | |
1682 | { | |
cfce2ea2 | 1683 | varobj_update_result r = {0}; |
a109c7c1 | 1684 | |
cfce2ea2 | 1685 | r.varobj = *varp; |
b6313243 | 1686 | VEC_safe_push (varobj_update_result, stack, &r); |
b20d8971 | 1687 | } |
8b93c638 | 1688 | |
8756216b | 1689 | /* Walk through the children, reconstructing them all. */ |
b6313243 | 1690 | while (!VEC_empty (varobj_update_result, stack)) |
8b93c638 | 1691 | { |
b6313243 TT |
1692 | varobj_update_result r = *(VEC_last (varobj_update_result, stack)); |
1693 | struct varobj *v = r.varobj; | |
1694 | ||
1695 | VEC_pop (varobj_update_result, stack); | |
1696 | ||
1697 | /* Update this variable, unless it's a root, which is already | |
1698 | updated. */ | |
1699 | if (!r.value_installed) | |
7a290c40 JB |
1700 | { |
1701 | struct type *new_type; | |
1702 | ||
b6313243 | 1703 | new = value_of_child (v->parent, v->index); |
8264ba82 AG |
1704 | if (update_type_if_necessary(v, new)) |
1705 | r.type_changed = 1; | |
7a290c40 JB |
1706 | if (new) |
1707 | new_type = value_type (new); | |
1708 | else | |
ca20d462 | 1709 | new_type = v->root->lang_ops->type_of_child (v->parent, v->index); |
7a290c40 JB |
1710 | |
1711 | if (varobj_value_has_mutated (v, new, new_type)) | |
1712 | { | |
1713 | /* The children are no longer valid; delete them now. | |
1714 | Report the fact that its type changed as well. */ | |
1715 | varobj_delete (v, NULL, 1 /* only_children */); | |
1716 | v->num_children = -1; | |
1717 | v->to = -1; | |
1718 | v->from = -1; | |
1719 | v->type = new_type; | |
1720 | r.type_changed = 1; | |
1721 | } | |
1722 | ||
1723 | if (install_new_value (v, new, r.type_changed)) | |
b6313243 TT |
1724 | { |
1725 | r.changed = 1; | |
1726 | v->updated = 0; | |
1727 | } | |
1728 | } | |
1729 | ||
31f628ae YQ |
1730 | /* We probably should not get children of a dynamic varobj, but |
1731 | for which -var-list-children was never invoked. */ | |
1732 | if (varobj_is_dynamic_p (v)) | |
b6313243 | 1733 | { |
8264ba82 AG |
1734 | VEC (varobj_p) *changed = 0, *type_changed = 0, *unchanged = 0; |
1735 | VEC (varobj_p) *new = 0; | |
26f9bcee | 1736 | int i, children_changed = 0; |
b6313243 TT |
1737 | |
1738 | if (v->frozen) | |
1739 | continue; | |
1740 | ||
bb5ce47a | 1741 | if (!v->dynamic->children_requested) |
0cc7d26f TT |
1742 | { |
1743 | int dummy; | |
1744 | ||
1745 | /* If we initially did not have potential children, but | |
1746 | now we do, consider the varobj as changed. | |
1747 | Otherwise, if children were never requested, consider | |
1748 | it as unchanged -- presumably, such varobj is not yet | |
1749 | expanded in the UI, so we need not bother getting | |
1750 | it. */ | |
1751 | if (!varobj_has_more (v, 0)) | |
1752 | { | |
8264ba82 | 1753 | update_dynamic_varobj_children (v, NULL, NULL, NULL, NULL, |
0cc7d26f TT |
1754 | &dummy, 0, 0, 0); |
1755 | if (varobj_has_more (v, 0)) | |
1756 | r.changed = 1; | |
1757 | } | |
1758 | ||
1759 | if (r.changed) | |
1760 | VEC_safe_push (varobj_update_result, result, &r); | |
1761 | ||
1762 | continue; | |
1763 | } | |
1764 | ||
b6313243 TT |
1765 | /* If update_dynamic_varobj_children returns 0, then we have |
1766 | a non-conforming pretty-printer, so we skip it. */ | |
8264ba82 AG |
1767 | if (update_dynamic_varobj_children (v, &changed, &type_changed, &new, |
1768 | &unchanged, &children_changed, 1, | |
0cc7d26f | 1769 | v->from, v->to)) |
b6313243 | 1770 | { |
0cc7d26f | 1771 | if (children_changed || new) |
b6313243 | 1772 | { |
0cc7d26f TT |
1773 | r.children_changed = 1; |
1774 | r.new = new; | |
b6313243 | 1775 | } |
0cc7d26f TT |
1776 | /* Push in reverse order so that the first child is |
1777 | popped from the work stack first, and so will be | |
1778 | added to result first. This does not affect | |
1779 | correctness, just "nicer". */ | |
8264ba82 AG |
1780 | for (i = VEC_length (varobj_p, type_changed) - 1; i >= 0; --i) |
1781 | { | |
1782 | varobj_p tmp = VEC_index (varobj_p, type_changed, i); | |
1783 | varobj_update_result r = {0}; | |
1784 | ||
1785 | /* Type may change only if value was changed. */ | |
1786 | r.varobj = tmp; | |
1787 | r.changed = 1; | |
1788 | r.type_changed = 1; | |
1789 | r.value_installed = 1; | |
1790 | VEC_safe_push (varobj_update_result, stack, &r); | |
1791 | } | |
0cc7d26f | 1792 | for (i = VEC_length (varobj_p, changed) - 1; i >= 0; --i) |
b6313243 | 1793 | { |
0cc7d26f | 1794 | varobj_p tmp = VEC_index (varobj_p, changed, i); |
cfce2ea2 | 1795 | varobj_update_result r = {0}; |
a109c7c1 | 1796 | |
cfce2ea2 | 1797 | r.varobj = tmp; |
0cc7d26f | 1798 | r.changed = 1; |
b6313243 TT |
1799 | r.value_installed = 1; |
1800 | VEC_safe_push (varobj_update_result, stack, &r); | |
1801 | } | |
0cc7d26f TT |
1802 | for (i = VEC_length (varobj_p, unchanged) - 1; i >= 0; --i) |
1803 | { | |
1804 | varobj_p tmp = VEC_index (varobj_p, unchanged, i); | |
a109c7c1 | 1805 | |
0cc7d26f TT |
1806 | if (!tmp->frozen) |
1807 | { | |
cfce2ea2 | 1808 | varobj_update_result r = {0}; |
a109c7c1 | 1809 | |
cfce2ea2 | 1810 | r.varobj = tmp; |
0cc7d26f TT |
1811 | r.value_installed = 1; |
1812 | VEC_safe_push (varobj_update_result, stack, &r); | |
1813 | } | |
1814 | } | |
b6313243 TT |
1815 | if (r.changed || r.children_changed) |
1816 | VEC_safe_push (varobj_update_result, result, &r); | |
0cc7d26f | 1817 | |
8264ba82 AG |
1818 | /* Free CHANGED, TYPE_CHANGED and UNCHANGED, but not NEW, |
1819 | because NEW has been put into the result vector. */ | |
0cc7d26f | 1820 | VEC_free (varobj_p, changed); |
8264ba82 | 1821 | VEC_free (varobj_p, type_changed); |
0cc7d26f TT |
1822 | VEC_free (varobj_p, unchanged); |
1823 | ||
b6313243 TT |
1824 | continue; |
1825 | } | |
1826 | } | |
28335dcc VP |
1827 | |
1828 | /* Push any children. Use reverse order so that the first | |
1829 | child is popped from the work stack first, and so | |
1830 | will be added to result first. This does not | |
1831 | affect correctness, just "nicer". */ | |
1832 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1833 | { |
28335dcc | 1834 | varobj_p c = VEC_index (varobj_p, v->children, i); |
a109c7c1 | 1835 | |
28335dcc | 1836 | /* Child may be NULL if explicitly deleted by -var-delete. */ |
25d5ea92 | 1837 | if (c != NULL && !c->frozen) |
28335dcc | 1838 | { |
cfce2ea2 | 1839 | varobj_update_result r = {0}; |
a109c7c1 | 1840 | |
cfce2ea2 | 1841 | r.varobj = c; |
b6313243 | 1842 | VEC_safe_push (varobj_update_result, stack, &r); |
28335dcc | 1843 | } |
8b93c638 | 1844 | } |
b6313243 TT |
1845 | |
1846 | if (r.changed || r.type_changed) | |
1847 | VEC_safe_push (varobj_update_result, result, &r); | |
8b93c638 JM |
1848 | } |
1849 | ||
b6313243 TT |
1850 | VEC_free (varobj_update_result, stack); |
1851 | ||
f7f9ae2c | 1852 | return result; |
8b93c638 JM |
1853 | } |
1854 | \f | |
1855 | ||
1856 | /* Helper functions */ | |
1857 | ||
1858 | /* | |
1859 | * Variable object construction/destruction | |
1860 | */ | |
1861 | ||
1862 | static int | |
fba45db2 KB |
1863 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1864 | int only_children_p) | |
8b93c638 JM |
1865 | { |
1866 | int delcount = 0; | |
1867 | ||
1868 | delete_variable_1 (resultp, &delcount, var, | |
1869 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1870 | ||
1871 | return delcount; | |
1872 | } | |
1873 | ||
581e13c1 | 1874 | /* Delete the variable object VAR and its children. */ |
8b93c638 JM |
1875 | /* IMPORTANT NOTE: If we delete a variable which is a child |
1876 | and the parent is not removed we dump core. It must be always | |
581e13c1 | 1877 | initially called with remove_from_parent_p set. */ |
8b93c638 | 1878 | static void |
72330bd6 AC |
1879 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1880 | struct varobj *var, int only_children_p, | |
1881 | int remove_from_parent_p) | |
8b93c638 | 1882 | { |
28335dcc | 1883 | int i; |
8b93c638 | 1884 | |
581e13c1 | 1885 | /* Delete any children of this variable, too. */ |
28335dcc VP |
1886 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1887 | { | |
1888 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
a109c7c1 | 1889 | |
214270ab VP |
1890 | if (!child) |
1891 | continue; | |
8b93c638 | 1892 | if (!remove_from_parent_p) |
28335dcc VP |
1893 | child->parent = NULL; |
1894 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1895 | } |
28335dcc | 1896 | VEC_free (varobj_p, var->children); |
8b93c638 | 1897 | |
581e13c1 | 1898 | /* if we were called to delete only the children we are done here. */ |
8b93c638 JM |
1899 | if (only_children_p) |
1900 | return; | |
1901 | ||
581e13c1 | 1902 | /* Otherwise, add it to the list of deleted ones and proceed to do so. */ |
73a93a32 | 1903 | /* If the name is null, this is a temporary variable, that has not |
581e13c1 | 1904 | yet been installed, don't report it, it belongs to the caller... */ |
73a93a32 | 1905 | if (var->obj_name != NULL) |
8b93c638 | 1906 | { |
5b616ba1 | 1907 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1908 | *delcountp = *delcountp + 1; |
1909 | } | |
1910 | ||
581e13c1 | 1911 | /* If this variable has a parent, remove it from its parent's list. */ |
8b93c638 JM |
1912 | /* OPTIMIZATION: if the parent of this variable is also being deleted, |
1913 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1914 | expensive list search to find the element to remove when we are | |
581e13c1 | 1915 | discarding the list afterwards. */ |
72330bd6 | 1916 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1917 | { |
28335dcc | 1918 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1919 | } |
72330bd6 | 1920 | |
73a93a32 JI |
1921 | if (var->obj_name != NULL) |
1922 | uninstall_variable (var); | |
8b93c638 | 1923 | |
581e13c1 | 1924 | /* Free memory associated with this variable. */ |
8b93c638 JM |
1925 | free_variable (var); |
1926 | } | |
1927 | ||
581e13c1 | 1928 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ |
8b93c638 | 1929 | static int |
fba45db2 | 1930 | install_variable (struct varobj *var) |
8b93c638 JM |
1931 | { |
1932 | struct vlist *cv; | |
1933 | struct vlist *newvl; | |
1934 | const char *chp; | |
1935 | unsigned int index = 0; | |
1936 | unsigned int i = 1; | |
1937 | ||
1938 | for (chp = var->obj_name; *chp; chp++) | |
1939 | { | |
1940 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1941 | } | |
1942 | ||
1943 | cv = *(varobj_table + index); | |
1944 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1945 | cv = cv->next; | |
1946 | ||
1947 | if (cv != NULL) | |
8a3fe4f8 | 1948 | error (_("Duplicate variable object name")); |
8b93c638 | 1949 | |
581e13c1 | 1950 | /* Add varobj to hash table. */ |
8b93c638 JM |
1951 | newvl = xmalloc (sizeof (struct vlist)); |
1952 | newvl->next = *(varobj_table + index); | |
1953 | newvl->var = var; | |
1954 | *(varobj_table + index) = newvl; | |
1955 | ||
581e13c1 | 1956 | /* If root, add varobj to root list. */ |
b2c2bd75 | 1957 | if (is_root_p (var)) |
8b93c638 | 1958 | { |
581e13c1 | 1959 | /* Add to list of root variables. */ |
8b93c638 JM |
1960 | if (rootlist == NULL) |
1961 | var->root->next = NULL; | |
1962 | else | |
1963 | var->root->next = rootlist; | |
1964 | rootlist = var->root; | |
8b93c638 JM |
1965 | } |
1966 | ||
1967 | return 1; /* OK */ | |
1968 | } | |
1969 | ||
581e13c1 | 1970 | /* Unistall the object VAR. */ |
8b93c638 | 1971 | static void |
fba45db2 | 1972 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1973 | { |
1974 | struct vlist *cv; | |
1975 | struct vlist *prev; | |
1976 | struct varobj_root *cr; | |
1977 | struct varobj_root *prer; | |
1978 | const char *chp; | |
1979 | unsigned int index = 0; | |
1980 | unsigned int i = 1; | |
1981 | ||
581e13c1 | 1982 | /* Remove varobj from hash table. */ |
8b93c638 JM |
1983 | for (chp = var->obj_name; *chp; chp++) |
1984 | { | |
1985 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1986 | } | |
1987 | ||
1988 | cv = *(varobj_table + index); | |
1989 | prev = NULL; | |
1990 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1991 | { | |
1992 | prev = cv; | |
1993 | cv = cv->next; | |
1994 | } | |
1995 | ||
1996 | if (varobjdebug) | |
1997 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1998 | ||
1999 | if (cv == NULL) | |
2000 | { | |
72330bd6 AC |
2001 | warning |
2002 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
2003 | var->obj_name); | |
8b93c638 JM |
2004 | return; |
2005 | } | |
2006 | ||
2007 | if (prev == NULL) | |
2008 | *(varobj_table + index) = cv->next; | |
2009 | else | |
2010 | prev->next = cv->next; | |
2011 | ||
b8c9b27d | 2012 | xfree (cv); |
8b93c638 | 2013 | |
581e13c1 | 2014 | /* If root, remove varobj from root list. */ |
b2c2bd75 | 2015 | if (is_root_p (var)) |
8b93c638 | 2016 | { |
581e13c1 | 2017 | /* Remove from list of root variables. */ |
8b93c638 JM |
2018 | if (rootlist == var->root) |
2019 | rootlist = var->root->next; | |
2020 | else | |
2021 | { | |
2022 | prer = NULL; | |
2023 | cr = rootlist; | |
2024 | while ((cr != NULL) && (cr->rootvar != var)) | |
2025 | { | |
2026 | prer = cr; | |
2027 | cr = cr->next; | |
2028 | } | |
2029 | if (cr == NULL) | |
2030 | { | |
8f7e195f JB |
2031 | warning (_("Assertion failed: Could not find " |
2032 | "varobj \"%s\" in root list"), | |
3e43a32a | 2033 | var->obj_name); |
8b93c638 JM |
2034 | return; |
2035 | } | |
2036 | if (prer == NULL) | |
2037 | rootlist = NULL; | |
2038 | else | |
2039 | prer->next = cr->next; | |
2040 | } | |
8b93c638 JM |
2041 | } |
2042 | ||
2043 | } | |
2044 | ||
581e13c1 | 2045 | /* Create and install a child of the parent of the given name. */ |
8b93c638 | 2046 | static struct varobj * |
fba45db2 | 2047 | create_child (struct varobj *parent, int index, char *name) |
b6313243 | 2048 | { |
5a2e0d6e YQ |
2049 | struct varobj_item item; |
2050 | ||
2051 | item.name = name; | |
2052 | item.value = value_of_child (parent, index); | |
2053 | ||
2054 | return create_child_with_value (parent, index, &item); | |
b6313243 TT |
2055 | } |
2056 | ||
2057 | static struct varobj * | |
5a2e0d6e YQ |
2058 | create_child_with_value (struct varobj *parent, int index, |
2059 | struct varobj_item *item) | |
8b93c638 JM |
2060 | { |
2061 | struct varobj *child; | |
2062 | char *childs_name; | |
2063 | ||
2064 | child = new_variable (); | |
2065 | ||
5e5ac9a5 | 2066 | /* NAME is allocated by caller. */ |
5a2e0d6e | 2067 | child->name = item->name; |
8b93c638 | 2068 | child->index = index; |
8b93c638 JM |
2069 | child->parent = parent; |
2070 | child->root = parent->root; | |
85254831 | 2071 | |
99ad9427 | 2072 | if (varobj_is_anonymous_child (child)) |
85254831 KS |
2073 | childs_name = xstrprintf ("%s.%d_anonymous", parent->obj_name, index); |
2074 | else | |
5a2e0d6e | 2075 | childs_name = xstrprintf ("%s.%s", parent->obj_name, item->name); |
8b93c638 | 2076 | child->obj_name = childs_name; |
85254831 | 2077 | |
8b93c638 JM |
2078 | install_variable (child); |
2079 | ||
acd65feb VP |
2080 | /* Compute the type of the child. Must do this before |
2081 | calling install_new_value. */ | |
5a2e0d6e | 2082 | if (item->value != NULL) |
acd65feb | 2083 | /* If the child had no evaluation errors, var->value |
581e13c1 | 2084 | will be non-NULL and contain a valid type. */ |
5a2e0d6e | 2085 | child->type = value_actual_type (item->value, 0, NULL); |
acd65feb | 2086 | else |
581e13c1 | 2087 | /* Otherwise, we must compute the type. */ |
ca20d462 YQ |
2088 | child->type = (*child->root->lang_ops->type_of_child) (child->parent, |
2089 | child->index); | |
5a2e0d6e | 2090 | install_new_value (child, item->value, 1); |
acd65feb | 2091 | |
8b93c638 JM |
2092 | return child; |
2093 | } | |
8b93c638 JM |
2094 | \f |
2095 | ||
2096 | /* | |
2097 | * Miscellaneous utility functions. | |
2098 | */ | |
2099 | ||
581e13c1 | 2100 | /* Allocate memory and initialize a new variable. */ |
8b93c638 JM |
2101 | static struct varobj * |
2102 | new_variable (void) | |
2103 | { | |
2104 | struct varobj *var; | |
2105 | ||
2106 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
2107 | var->name = NULL; | |
02142340 | 2108 | var->path_expr = NULL; |
8b93c638 JM |
2109 | var->obj_name = NULL; |
2110 | var->index = -1; | |
2111 | var->type = NULL; | |
2112 | var->value = NULL; | |
8b93c638 JM |
2113 | var->num_children = -1; |
2114 | var->parent = NULL; | |
2115 | var->children = NULL; | |
2116 | var->format = 0; | |
2117 | var->root = NULL; | |
fb9b6b35 | 2118 | var->updated = 0; |
85265413 | 2119 | var->print_value = NULL; |
25d5ea92 VP |
2120 | var->frozen = 0; |
2121 | var->not_fetched = 0; | |
bb5ce47a YQ |
2122 | var->dynamic |
2123 | = (struct varobj_dynamic *) xmalloc (sizeof (struct varobj_dynamic)); | |
2124 | var->dynamic->children_requested = 0; | |
0cc7d26f TT |
2125 | var->from = -1; |
2126 | var->to = -1; | |
bb5ce47a YQ |
2127 | var->dynamic->constructor = 0; |
2128 | var->dynamic->pretty_printer = 0; | |
2129 | var->dynamic->child_iter = 0; | |
2130 | var->dynamic->saved_item = 0; | |
8b93c638 JM |
2131 | |
2132 | return var; | |
2133 | } | |
2134 | ||
581e13c1 | 2135 | /* Allocate memory and initialize a new root variable. */ |
8b93c638 JM |
2136 | static struct varobj * |
2137 | new_root_variable (void) | |
2138 | { | |
2139 | struct varobj *var = new_variable (); | |
a109c7c1 | 2140 | |
3e43a32a | 2141 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root)); |
ca20d462 | 2142 | var->root->lang_ops = NULL; |
8b93c638 JM |
2143 | var->root->exp = NULL; |
2144 | var->root->valid_block = NULL; | |
7a424e99 | 2145 | var->root->frame = null_frame_id; |
a5defcdc | 2146 | var->root->floating = 0; |
8b93c638 | 2147 | var->root->rootvar = NULL; |
8756216b | 2148 | var->root->is_valid = 1; |
8b93c638 JM |
2149 | |
2150 | return var; | |
2151 | } | |
2152 | ||
581e13c1 | 2153 | /* Free any allocated memory associated with VAR. */ |
8b93c638 | 2154 | static void |
fba45db2 | 2155 | free_variable (struct varobj *var) |
8b93c638 | 2156 | { |
d452c4bc | 2157 | #if HAVE_PYTHON |
bb5ce47a | 2158 | if (var->dynamic->pretty_printer != NULL) |
d452c4bc UW |
2159 | { |
2160 | struct cleanup *cleanup = varobj_ensure_python_env (var); | |
bb5ce47a YQ |
2161 | |
2162 | Py_XDECREF (var->dynamic->constructor); | |
2163 | Py_XDECREF (var->dynamic->pretty_printer); | |
d452c4bc UW |
2164 | do_cleanups (cleanup); |
2165 | } | |
2166 | #endif | |
2167 | ||
827f100c YQ |
2168 | varobj_iter_delete (var->dynamic->child_iter); |
2169 | varobj_clear_saved_item (var->dynamic); | |
36746093 JK |
2170 | value_free (var->value); |
2171 | ||
581e13c1 | 2172 | /* Free the expression if this is a root variable. */ |
b2c2bd75 | 2173 | if (is_root_p (var)) |
8b93c638 | 2174 | { |
3038237c | 2175 | xfree (var->root->exp); |
8038e1e2 | 2176 | xfree (var->root); |
8b93c638 JM |
2177 | } |
2178 | ||
8038e1e2 AC |
2179 | xfree (var->name); |
2180 | xfree (var->obj_name); | |
85265413 | 2181 | xfree (var->print_value); |
02142340 | 2182 | xfree (var->path_expr); |
bb5ce47a | 2183 | xfree (var->dynamic); |
8038e1e2 | 2184 | xfree (var); |
8b93c638 JM |
2185 | } |
2186 | ||
74b7792f AC |
2187 | static void |
2188 | do_free_variable_cleanup (void *var) | |
2189 | { | |
2190 | free_variable (var); | |
2191 | } | |
2192 | ||
2193 | static struct cleanup * | |
2194 | make_cleanup_free_variable (struct varobj *var) | |
2195 | { | |
2196 | return make_cleanup (do_free_variable_cleanup, var); | |
2197 | } | |
2198 | ||
6e2a9270 VP |
2199 | /* Return the type of the value that's stored in VAR, |
2200 | or that would have being stored there if the | |
581e13c1 | 2201 | value were accessible. |
6e2a9270 VP |
2202 | |
2203 | This differs from VAR->type in that VAR->type is always | |
2204 | the true type of the expession in the source language. | |
2205 | The return value of this function is the type we're | |
2206 | actually storing in varobj, and using for displaying | |
2207 | the values and for comparing previous and new values. | |
2208 | ||
2209 | For example, top-level references are always stripped. */ | |
99ad9427 YQ |
2210 | struct type * |
2211 | varobj_get_value_type (struct varobj *var) | |
6e2a9270 VP |
2212 | { |
2213 | struct type *type; | |
2214 | ||
2215 | if (var->value) | |
2216 | type = value_type (var->value); | |
2217 | else | |
2218 | type = var->type; | |
2219 | ||
2220 | type = check_typedef (type); | |
2221 | ||
2222 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
2223 | type = get_target_type (type); | |
2224 | ||
2225 | type = check_typedef (type); | |
2226 | ||
2227 | return type; | |
2228 | } | |
2229 | ||
8b93c638 | 2230 | /* What is the default display for this variable? We assume that |
581e13c1 | 2231 | everything is "natural". Any exceptions? */ |
8b93c638 | 2232 | static enum varobj_display_formats |
fba45db2 | 2233 | variable_default_display (struct varobj *var) |
8b93c638 JM |
2234 | { |
2235 | return FORMAT_NATURAL; | |
2236 | } | |
2237 | ||
581e13c1 | 2238 | /* FIXME: The following should be generic for any pointer. */ |
8b93c638 | 2239 | static void |
fba45db2 | 2240 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
2241 | { |
2242 | struct cpstack *s; | |
2243 | ||
2244 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
2245 | s->name = name; | |
2246 | s->next = *pstack; | |
2247 | *pstack = s; | |
2248 | } | |
2249 | ||
581e13c1 | 2250 | /* FIXME: The following should be generic for any pointer. */ |
8b93c638 | 2251 | static char * |
fba45db2 | 2252 | cppop (struct cpstack **pstack) |
8b93c638 JM |
2253 | { |
2254 | struct cpstack *s; | |
2255 | char *v; | |
2256 | ||
2257 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
2258 | return NULL; | |
2259 | ||
2260 | s = *pstack; | |
2261 | v = s->name; | |
2262 | *pstack = (*pstack)->next; | |
b8c9b27d | 2263 | xfree (s); |
8b93c638 JM |
2264 | |
2265 | return v; | |
2266 | } | |
2267 | \f | |
2268 | /* | |
2269 | * Language-dependencies | |
2270 | */ | |
2271 | ||
2272 | /* Common entry points */ | |
2273 | ||
8b93c638 JM |
2274 | /* Return the number of children for a given variable. |
2275 | The result of this function is defined by the language | |
581e13c1 | 2276 | implementation. The number of children returned by this function |
8b93c638 | 2277 | is the number of children that the user will see in the variable |
581e13c1 | 2278 | display. */ |
8b93c638 | 2279 | static int |
fba45db2 | 2280 | number_of_children (struct varobj *var) |
8b93c638 | 2281 | { |
ca20d462 | 2282 | return (*var->root->lang_ops->number_of_children) (var); |
8b93c638 JM |
2283 | } |
2284 | ||
3e43a32a | 2285 | /* What is the expression for the root varobj VAR? Returns a malloc'd |
581e13c1 | 2286 | string. */ |
8b93c638 | 2287 | static char * |
fba45db2 | 2288 | name_of_variable (struct varobj *var) |
8b93c638 | 2289 | { |
ca20d462 | 2290 | return (*var->root->lang_ops->name_of_variable) (var); |
8b93c638 JM |
2291 | } |
2292 | ||
3e43a32a | 2293 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd |
581e13c1 | 2294 | string. */ |
8b93c638 | 2295 | static char * |
fba45db2 | 2296 | name_of_child (struct varobj *var, int index) |
8b93c638 | 2297 | { |
ca20d462 | 2298 | return (*var->root->lang_ops->name_of_child) (var, index); |
8b93c638 JM |
2299 | } |
2300 | ||
2213e2be YQ |
2301 | /* If frame associated with VAR can be found, switch |
2302 | to it and return 1. Otherwise, return 0. */ | |
2303 | ||
2304 | static int | |
2305 | check_scope (struct varobj *var) | |
2306 | { | |
2307 | struct frame_info *fi; | |
2308 | int scope; | |
2309 | ||
2310 | fi = frame_find_by_id (var->root->frame); | |
2311 | scope = fi != NULL; | |
2312 | ||
2313 | if (fi) | |
2314 | { | |
2315 | CORE_ADDR pc = get_frame_pc (fi); | |
2316 | ||
2317 | if (pc < BLOCK_START (var->root->valid_block) || | |
2318 | pc >= BLOCK_END (var->root->valid_block)) | |
2319 | scope = 0; | |
2320 | else | |
2321 | select_frame (fi); | |
2322 | } | |
2323 | return scope; | |
2324 | } | |
2325 | ||
2326 | /* Helper function to value_of_root. */ | |
2327 | ||
2328 | static struct value * | |
2329 | value_of_root_1 (struct varobj **var_handle) | |
2330 | { | |
2331 | struct value *new_val = NULL; | |
2332 | struct varobj *var = *var_handle; | |
2333 | int within_scope = 0; | |
2334 | struct cleanup *back_to; | |
2335 | ||
2336 | /* Only root variables can be updated... */ | |
2337 | if (!is_root_p (var)) | |
2338 | /* Not a root var. */ | |
2339 | return NULL; | |
2340 | ||
2341 | back_to = make_cleanup_restore_current_thread (); | |
2342 | ||
2343 | /* Determine whether the variable is still around. */ | |
2344 | if (var->root->valid_block == NULL || var->root->floating) | |
2345 | within_scope = 1; | |
2346 | else if (var->root->thread_id == 0) | |
2347 | { | |
2348 | /* The program was single-threaded when the variable object was | |
2349 | created. Technically, it's possible that the program became | |
2350 | multi-threaded since then, but we don't support such | |
2351 | scenario yet. */ | |
2352 | within_scope = check_scope (var); | |
2353 | } | |
2354 | else | |
2355 | { | |
2356 | ptid_t ptid = thread_id_to_pid (var->root->thread_id); | |
2357 | if (in_thread_list (ptid)) | |
2358 | { | |
2359 | switch_to_thread (ptid); | |
2360 | within_scope = check_scope (var); | |
2361 | } | |
2362 | } | |
2363 | ||
2364 | if (within_scope) | |
2365 | { | |
2366 | volatile struct gdb_exception except; | |
2367 | ||
2368 | /* We need to catch errors here, because if evaluate | |
2369 | expression fails we want to just return NULL. */ | |
2370 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
2371 | { | |
2372 | new_val = evaluate_expression (var->root->exp); | |
2373 | } | |
2374 | } | |
2375 | ||
2376 | do_cleanups (back_to); | |
2377 | ||
2378 | return new_val; | |
2379 | } | |
2380 | ||
a5defcdc VP |
2381 | /* What is the ``struct value *'' of the root variable VAR? |
2382 | For floating variable object, evaluation can get us a value | |
2383 | of different type from what is stored in varobj already. In | |
2384 | that case: | |
2385 | - *type_changed will be set to 1 | |
2386 | - old varobj will be freed, and new one will be | |
2387 | created, with the same name. | |
2388 | - *var_handle will be set to the new varobj | |
2389 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 2390 | static struct value * |
fba45db2 | 2391 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 2392 | { |
73a93a32 JI |
2393 | struct varobj *var; |
2394 | ||
2395 | if (var_handle == NULL) | |
2396 | return NULL; | |
2397 | ||
2398 | var = *var_handle; | |
2399 | ||
2400 | /* This should really be an exception, since this should | |
581e13c1 | 2401 | only get called with a root variable. */ |
73a93a32 | 2402 | |
b2c2bd75 | 2403 | if (!is_root_p (var)) |
73a93a32 JI |
2404 | return NULL; |
2405 | ||
a5defcdc | 2406 | if (var->root->floating) |
73a93a32 JI |
2407 | { |
2408 | struct varobj *tmp_var; | |
2409 | char *old_type, *new_type; | |
6225abfa | 2410 | |
73a93a32 JI |
2411 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
2412 | USE_SELECTED_FRAME); | |
2413 | if (tmp_var == NULL) | |
2414 | { | |
2415 | return NULL; | |
2416 | } | |
6225abfa | 2417 | old_type = varobj_get_type (var); |
73a93a32 | 2418 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 2419 | if (strcmp (old_type, new_type) == 0) |
73a93a32 | 2420 | { |
fcacd99f VP |
2421 | /* The expression presently stored inside var->root->exp |
2422 | remembers the locations of local variables relatively to | |
2423 | the frame where the expression was created (in DWARF location | |
2424 | button, for example). Naturally, those locations are not | |
2425 | correct in other frames, so update the expression. */ | |
2426 | ||
2427 | struct expression *tmp_exp = var->root->exp; | |
a109c7c1 | 2428 | |
fcacd99f VP |
2429 | var->root->exp = tmp_var->root->exp; |
2430 | tmp_var->root->exp = tmp_exp; | |
2431 | ||
73a93a32 JI |
2432 | varobj_delete (tmp_var, NULL, 0); |
2433 | *type_changed = 0; | |
2434 | } | |
2435 | else | |
2436 | { | |
1b36a34b | 2437 | tmp_var->obj_name = xstrdup (var->obj_name); |
0cc7d26f TT |
2438 | tmp_var->from = var->from; |
2439 | tmp_var->to = var->to; | |
a5defcdc VP |
2440 | varobj_delete (var, NULL, 0); |
2441 | ||
73a93a32 JI |
2442 | install_variable (tmp_var); |
2443 | *var_handle = tmp_var; | |
705da579 | 2444 | var = *var_handle; |
73a93a32 JI |
2445 | *type_changed = 1; |
2446 | } | |
74dddad3 MS |
2447 | xfree (old_type); |
2448 | xfree (new_type); | |
73a93a32 JI |
2449 | } |
2450 | else | |
2451 | { | |
2452 | *type_changed = 0; | |
2453 | } | |
2454 | ||
7a290c40 JB |
2455 | { |
2456 | struct value *value; | |
2457 | ||
2213e2be | 2458 | value = value_of_root_1 (var_handle); |
7a290c40 JB |
2459 | if (var->value == NULL || value == NULL) |
2460 | { | |
2461 | /* For root varobj-s, a NULL value indicates a scoping issue. | |
2462 | So, nothing to do in terms of checking for mutations. */ | |
2463 | } | |
2464 | else if (varobj_value_has_mutated (var, value, value_type (value))) | |
2465 | { | |
2466 | /* The type has mutated, so the children are no longer valid. | |
2467 | Just delete them, and tell our caller that the type has | |
2468 | changed. */ | |
2469 | varobj_delete (var, NULL, 1 /* only_children */); | |
2470 | var->num_children = -1; | |
2471 | var->to = -1; | |
2472 | var->from = -1; | |
2473 | *type_changed = 1; | |
2474 | } | |
2475 | return value; | |
2476 | } | |
8b93c638 JM |
2477 | } |
2478 | ||
581e13c1 | 2479 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
30b28db1 | 2480 | static struct value * |
fba45db2 | 2481 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 2482 | { |
30b28db1 | 2483 | struct value *value; |
8b93c638 | 2484 | |
ca20d462 | 2485 | value = (*parent->root->lang_ops->value_of_child) (parent, index); |
8b93c638 | 2486 | |
8b93c638 JM |
2487 | return value; |
2488 | } | |
2489 | ||
581e13c1 | 2490 | /* GDB already has a command called "value_of_variable". Sigh. */ |
8b93c638 | 2491 | static char * |
de051565 | 2492 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2493 | { |
8756216b | 2494 | if (var->root->is_valid) |
0cc7d26f | 2495 | { |
bb5ce47a | 2496 | if (var->dynamic->pretty_printer != NULL) |
99ad9427 | 2497 | return varobj_value_get_print_value (var->value, var->format, var); |
ca20d462 | 2498 | return (*var->root->lang_ops->value_of_variable) (var, format); |
0cc7d26f | 2499 | } |
8756216b DP |
2500 | else |
2501 | return NULL; | |
8b93c638 JM |
2502 | } |
2503 | ||
99ad9427 YQ |
2504 | void |
2505 | varobj_formatted_print_options (struct value_print_options *opts, | |
2506 | enum varobj_display_formats format) | |
2507 | { | |
2508 | get_formatted_print_options (opts, format_code[(int) format]); | |
2509 | opts->deref_ref = 0; | |
2510 | opts->raw = 1; | |
2511 | } | |
2512 | ||
2513 | char * | |
2514 | varobj_value_get_print_value (struct value *value, | |
2515 | enum varobj_display_formats format, | |
2516 | struct varobj *var) | |
85265413 | 2517 | { |
57e66780 | 2518 | struct ui_file *stb; |
621c8364 | 2519 | struct cleanup *old_chain; |
ac91cd70 | 2520 | char *thevalue = NULL; |
79a45b7d | 2521 | struct value_print_options opts; |
be759fcf PM |
2522 | struct type *type = NULL; |
2523 | long len = 0; | |
2524 | char *encoding = NULL; | |
2525 | struct gdbarch *gdbarch = NULL; | |
3a182a69 JK |
2526 | /* Initialize it just to avoid a GCC false warning. */ |
2527 | CORE_ADDR str_addr = 0; | |
09ca9e2e | 2528 | int string_print = 0; |
57e66780 DJ |
2529 | |
2530 | if (value == NULL) | |
2531 | return NULL; | |
2532 | ||
621c8364 TT |
2533 | stb = mem_fileopen (); |
2534 | old_chain = make_cleanup_ui_file_delete (stb); | |
2535 | ||
be759fcf | 2536 | gdbarch = get_type_arch (value_type (value)); |
b6313243 | 2537 | #if HAVE_PYTHON |
0646da15 TT |
2538 | if (gdb_python_initialized) |
2539 | { | |
bb5ce47a | 2540 | PyObject *value_formatter = var->dynamic->pretty_printer; |
d452c4bc | 2541 | |
0646da15 | 2542 | varobj_ensure_python_env (var); |
09ca9e2e | 2543 | |
0646da15 TT |
2544 | if (value_formatter) |
2545 | { | |
2546 | /* First check to see if we have any children at all. If so, | |
2547 | we simply return {...}. */ | |
2548 | if (dynamic_varobj_has_child_method (var)) | |
2549 | { | |
2550 | do_cleanups (old_chain); | |
2551 | return xstrdup ("{...}"); | |
2552 | } | |
b6313243 | 2553 | |
0646da15 TT |
2554 | if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst)) |
2555 | { | |
2556 | struct value *replacement; | |
2557 | PyObject *output = NULL; | |
2558 | ||
2559 | output = apply_varobj_pretty_printer (value_formatter, | |
2560 | &replacement, | |
2561 | stb); | |
2562 | ||
2563 | /* If we have string like output ... */ | |
2564 | if (output) | |
2565 | { | |
2566 | make_cleanup_py_decref (output); | |
2567 | ||
2568 | /* If this is a lazy string, extract it. For lazy | |
2569 | strings we always print as a string, so set | |
2570 | string_print. */ | |
2571 | if (gdbpy_is_lazy_string (output)) | |
2572 | { | |
2573 | gdbpy_extract_lazy_string (output, &str_addr, &type, | |
2574 | &len, &encoding); | |
2575 | make_cleanup (free_current_contents, &encoding); | |
2576 | string_print = 1; | |
2577 | } | |
2578 | else | |
2579 | { | |
2580 | /* If it is a regular (non-lazy) string, extract | |
2581 | it and copy the contents into THEVALUE. If the | |
2582 | hint says to print it as a string, set | |
2583 | string_print. Otherwise just return the extracted | |
2584 | string as a value. */ | |
2585 | ||
2586 | char *s = python_string_to_target_string (output); | |
2587 | ||
2588 | if (s) | |
2589 | { | |
2590 | char *hint; | |
2591 | ||
2592 | hint = gdbpy_get_display_hint (value_formatter); | |
2593 | if (hint) | |
2594 | { | |
2595 | if (!strcmp (hint, "string")) | |
2596 | string_print = 1; | |
2597 | xfree (hint); | |
2598 | } | |
2599 | ||
2600 | len = strlen (s); | |
2601 | thevalue = xmemdup (s, len + 1, len + 1); | |
2602 | type = builtin_type (gdbarch)->builtin_char; | |
2603 | xfree (s); | |
2604 | ||
2605 | if (!string_print) | |
2606 | { | |
2607 | do_cleanups (old_chain); | |
2608 | return thevalue; | |
2609 | } | |
2610 | ||
2611 | make_cleanup (xfree, thevalue); | |
2612 | } | |
2613 | else | |
2614 | gdbpy_print_stack (); | |
2615 | } | |
2616 | } | |
2617 | /* If the printer returned a replacement value, set VALUE | |
2618 | to REPLACEMENT. If there is not a replacement value, | |
2619 | just use the value passed to this function. */ | |
2620 | if (replacement) | |
2621 | value = replacement; | |
2622 | } | |
2623 | } | |
2624 | } | |
b6313243 TT |
2625 | #endif |
2626 | ||
99ad9427 | 2627 | varobj_formatted_print_options (&opts, format); |
00bd41d6 PM |
2628 | |
2629 | /* If the THEVALUE has contents, it is a regular string. */ | |
b6313243 | 2630 | if (thevalue) |
ac91cd70 | 2631 | LA_PRINT_STRING (stb, type, (gdb_byte *) thevalue, len, encoding, 0, &opts); |
09ca9e2e | 2632 | else if (string_print) |
00bd41d6 PM |
2633 | /* Otherwise, if string_print is set, and it is not a regular |
2634 | string, it is a lazy string. */ | |
09ca9e2e | 2635 | val_print_string (type, encoding, str_addr, len, stb, &opts); |
b6313243 | 2636 | else |
00bd41d6 | 2637 | /* All other cases. */ |
b6313243 | 2638 | common_val_print (value, stb, 0, &opts, current_language); |
00bd41d6 | 2639 | |
759ef836 | 2640 | thevalue = ui_file_xstrdup (stb, NULL); |
57e66780 | 2641 | |
85265413 NR |
2642 | do_cleanups (old_chain); |
2643 | return thevalue; | |
2644 | } | |
2645 | ||
340a7723 NR |
2646 | int |
2647 | varobj_editable_p (struct varobj *var) | |
2648 | { | |
2649 | struct type *type; | |
340a7723 NR |
2650 | |
2651 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
2652 | return 0; | |
2653 | ||
99ad9427 | 2654 | type = varobj_get_value_type (var); |
340a7723 NR |
2655 | |
2656 | switch (TYPE_CODE (type)) | |
2657 | { | |
2658 | case TYPE_CODE_STRUCT: | |
2659 | case TYPE_CODE_UNION: | |
2660 | case TYPE_CODE_ARRAY: | |
2661 | case TYPE_CODE_FUNC: | |
2662 | case TYPE_CODE_METHOD: | |
2663 | return 0; | |
2664 | break; | |
2665 | ||
2666 | default: | |
2667 | return 1; | |
2668 | break; | |
2669 | } | |
2670 | } | |
2671 | ||
d32cafc7 | 2672 | /* Call VAR's value_is_changeable_p language-specific callback. */ |
acd65feb | 2673 | |
99ad9427 | 2674 | int |
b2c2bd75 | 2675 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 | 2676 | { |
ca20d462 | 2677 | return var->root->lang_ops->value_is_changeable_p (var); |
8b93c638 JM |
2678 | } |
2679 | ||
5a413362 VP |
2680 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
2681 | selected frame, and not bound to thread/frame. Such variable objects | |
2682 | are created using '@' as frame specifier to -var-create. */ | |
2683 | int | |
2684 | varobj_floating_p (struct varobj *var) | |
2685 | { | |
2686 | return var->root->floating; | |
2687 | } | |
2688 | ||
d32cafc7 JB |
2689 | /* Implement the "value_is_changeable_p" varobj callback for most |
2690 | languages. */ | |
2691 | ||
99ad9427 YQ |
2692 | int |
2693 | varobj_default_value_is_changeable_p (struct varobj *var) | |
d32cafc7 JB |
2694 | { |
2695 | int r; | |
2696 | struct type *type; | |
2697 | ||
2698 | if (CPLUS_FAKE_CHILD (var)) | |
2699 | return 0; | |
2700 | ||
99ad9427 | 2701 | type = varobj_get_value_type (var); |
d32cafc7 JB |
2702 | |
2703 | switch (TYPE_CODE (type)) | |
2704 | { | |
2705 | case TYPE_CODE_STRUCT: | |
2706 | case TYPE_CODE_UNION: | |
2707 | case TYPE_CODE_ARRAY: | |
2708 | r = 0; | |
2709 | break; | |
2710 | ||
2711 | default: | |
2712 | r = 1; | |
2713 | } | |
2714 | ||
2715 | return r; | |
2716 | } | |
2717 | ||
54333c3b JK |
2718 | /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them |
2719 | with an arbitrary caller supplied DATA pointer. */ | |
2720 | ||
2721 | void | |
2722 | all_root_varobjs (void (*func) (struct varobj *var, void *data), void *data) | |
2723 | { | |
2724 | struct varobj_root *var_root, *var_root_next; | |
2725 | ||
2726 | /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */ | |
2727 | ||
2728 | for (var_root = rootlist; var_root != NULL; var_root = var_root_next) | |
2729 | { | |
2730 | var_root_next = var_root->next; | |
2731 | ||
2732 | (*func) (var_root->rootvar, data); | |
2733 | } | |
2734 | } | |
8756216b | 2735 | |
54333c3b | 2736 | /* Invalidate varobj VAR if it is tied to locals and re-create it if it is |
4e969b4f AB |
2737 | defined on globals. It is a helper for varobj_invalidate. |
2738 | ||
2739 | This function is called after changing the symbol file, in this case the | |
2740 | pointers to "struct type" stored by the varobj are no longer valid. All | |
2741 | varobj must be either re-evaluated, or marked as invalid here. */ | |
2dbd25e5 | 2742 | |
54333c3b JK |
2743 | static void |
2744 | varobj_invalidate_iter (struct varobj *var, void *unused) | |
8756216b | 2745 | { |
4e969b4f AB |
2746 | /* global and floating var must be re-evaluated. */ |
2747 | if (var->root->floating || var->root->valid_block == NULL) | |
2dbd25e5 | 2748 | { |
54333c3b | 2749 | struct varobj *tmp_var; |
2dbd25e5 | 2750 | |
54333c3b JK |
2751 | /* Try to create a varobj with same expression. If we succeed |
2752 | replace the old varobj, otherwise invalidate it. */ | |
2753 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
2754 | USE_CURRENT_FRAME); | |
2755 | if (tmp_var != NULL) | |
2756 | { | |
2757 | tmp_var->obj_name = xstrdup (var->obj_name); | |
2758 | varobj_delete (var, NULL, 0); | |
2759 | install_variable (tmp_var); | |
2dbd25e5 | 2760 | } |
54333c3b JK |
2761 | else |
2762 | var->root->is_valid = 0; | |
2dbd25e5 | 2763 | } |
54333c3b JK |
2764 | else /* locals must be invalidated. */ |
2765 | var->root->is_valid = 0; | |
2766 | } | |
2767 | ||
2768 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2769 | are defined on globals. | |
2770 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2771 | ||
2772 | void | |
2773 | varobj_invalidate (void) | |
2774 | { | |
2775 | all_root_varobjs (varobj_invalidate_iter, NULL); | |
8756216b | 2776 | } |
1c3569d4 MR |
2777 | \f |
2778 | extern void _initialize_varobj (void); | |
2779 | void | |
2780 | _initialize_varobj (void) | |
2781 | { | |
2782 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2783 | ||
2784 | varobj_table = xmalloc (sizeof_table); | |
2785 | memset (varobj_table, 0, sizeof_table); | |
2786 | ||
2787 | add_setshow_zuinteger_cmd ("varobj", class_maintenance, | |
2788 | &varobjdebug, | |
2789 | _("Set varobj debugging."), | |
2790 | _("Show varobj debugging."), | |
2791 | _("When non-zero, varobj debugging is enabled."), | |
2792 | NULL, show_varobjdebug, | |
2793 | &setdebuglist, &showdebuglist); | |
2794 | } |