Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
618f726f | 3 | Copyright (C) 1999-2016 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[] = |
1c35a88f | 53 | { "natural", "binary", "decimal", "hexadecimal", "octal", "zero-hexadecimal" }; |
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 | |
4d01a485 | 67 | varobj. */ |
8b93c638 | 68 | struct varobj_root |
72330bd6 | 69 | { |
8b93c638 | 70 | |
4d01a485 PA |
71 | /* The expression for this parent. */ |
72 | expression_up 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 | |
5d5658a1 | 81 | /* The global thread ID that this varobj_root belongs 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 JM |
139 | /* A list of varobjs */ |
140 | ||
141 | struct vlist | |
72330bd6 AC |
142 | { |
143 | struct varobj *var; | |
144 | struct vlist *next; | |
145 | }; | |
8b93c638 JM |
146 | |
147 | /* Private function prototypes */ | |
148 | ||
581e13c1 | 149 | /* Helper functions for the above subcommands. */ |
8b93c638 | 150 | |
30914ca8 | 151 | static int delete_variable (struct varobj *, int); |
8b93c638 | 152 | |
30914ca8 | 153 | static void delete_variable_1 (int *, struct varobj *, int, int); |
8b93c638 | 154 | |
a14ed312 | 155 | static int install_variable (struct varobj *); |
8b93c638 | 156 | |
a14ed312 | 157 | static void uninstall_variable (struct varobj *); |
8b93c638 | 158 | |
2f408ecb | 159 | static struct varobj *create_child (struct varobj *, int, std::string &); |
8b93c638 | 160 | |
b6313243 | 161 | static struct varobj * |
5a2e0d6e YQ |
162 | create_child_with_value (struct varobj *parent, int index, |
163 | struct varobj_item *item); | |
b6313243 | 164 | |
8b93c638 JM |
165 | /* Utility routines */ |
166 | ||
a14ed312 | 167 | static struct varobj *new_variable (void); |
8b93c638 | 168 | |
a14ed312 | 169 | static struct varobj *new_root_variable (void); |
8b93c638 | 170 | |
a14ed312 | 171 | static void free_variable (struct varobj *var); |
8b93c638 | 172 | |
74b7792f AC |
173 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
174 | ||
a14ed312 | 175 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 176 | |
8264ba82 AG |
177 | static int update_type_if_necessary (struct varobj *var, |
178 | struct value *new_value); | |
179 | ||
acd65feb VP |
180 | static int install_new_value (struct varobj *var, struct value *value, |
181 | int initial); | |
182 | ||
581e13c1 | 183 | /* Language-specific routines. */ |
8b93c638 | 184 | |
b09e2c59 | 185 | static int number_of_children (const struct varobj *); |
8b93c638 | 186 | |
2f408ecb | 187 | static std::string name_of_variable (const struct varobj *); |
8b93c638 | 188 | |
2f408ecb | 189 | static std::string name_of_child (struct varobj *, int); |
8b93c638 | 190 | |
30b28db1 | 191 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 192 | |
c1cc6152 | 193 | static struct value *value_of_child (const struct varobj *parent, int index); |
8b93c638 | 194 | |
2f408ecb PA |
195 | static std::string my_value_of_variable (struct varobj *var, |
196 | enum varobj_display_formats format); | |
8b93c638 | 197 | |
b09e2c59 | 198 | static int is_root_p (const struct varobj *var); |
8b93c638 | 199 | |
9a1edae6 | 200 | static struct varobj *varobj_add_child (struct varobj *var, |
5a2e0d6e | 201 | struct varobj_item *item); |
b6313243 | 202 | |
8b93c638 JM |
203 | /* Private data */ |
204 | ||
581e13c1 | 205 | /* Mappings of varobj_display_formats enums to gdb's format codes. */ |
1c35a88f | 206 | static int format_code[] = { 0, 't', 'd', 'x', 'o', 'z' }; |
8b93c638 | 207 | |
581e13c1 | 208 | /* Header of the list of root variable objects. */ |
8b93c638 | 209 | static struct varobj_root *rootlist; |
8b93c638 | 210 | |
581e13c1 | 211 | /* Prime number indicating the number of buckets in the hash table. */ |
5fa13070 | 212 | /* A prime large enough to avoid too many collisions. */ |
8b93c638 JM |
213 | #define VAROBJ_TABLE_SIZE 227 |
214 | ||
581e13c1 | 215 | /* Pointer to the varobj hash table (built at run time). */ |
8b93c638 JM |
216 | static struct vlist **varobj_table; |
217 | ||
8b93c638 JM |
218 | \f |
219 | ||
220 | /* API Implementation */ | |
b2c2bd75 | 221 | static int |
b09e2c59 | 222 | is_root_p (const struct varobj *var) |
b2c2bd75 VP |
223 | { |
224 | return (var->root->rootvar == var); | |
225 | } | |
8b93c638 | 226 | |
d452c4bc UW |
227 | #ifdef HAVE_PYTHON |
228 | /* Helper function to install a Python environment suitable for | |
229 | use during operations on VAR. */ | |
e5250216 | 230 | struct cleanup * |
b09e2c59 | 231 | varobj_ensure_python_env (const struct varobj *var) |
d452c4bc UW |
232 | { |
233 | return ensure_python_env (var->root->exp->gdbarch, | |
234 | var->root->exp->language_defn); | |
235 | } | |
236 | #endif | |
237 | ||
7d8547c9 AC |
238 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
239 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
240 | ||
241 | static struct frame_info * | |
242 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
243 | { | |
244 | struct frame_info *frame = NULL; | |
245 | ||
246 | if (frame_addr == (CORE_ADDR) 0) | |
247 | return NULL; | |
248 | ||
9d49bdc2 PA |
249 | for (frame = get_current_frame (); |
250 | frame != NULL; | |
251 | frame = get_prev_frame (frame)) | |
7d8547c9 | 252 | { |
1fac167a UW |
253 | /* The CORE_ADDR we get as argument was parsed from a string GDB |
254 | output as $fp. This output got truncated to gdbarch_addr_bit. | |
255 | Truncate the frame base address in the same manner before | |
256 | comparing it against our argument. */ | |
257 | CORE_ADDR frame_base = get_frame_base_address (frame); | |
258 | int addr_bit = gdbarch_addr_bit (get_frame_arch (frame)); | |
a109c7c1 | 259 | |
1fac167a UW |
260 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
261 | frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
262 | ||
263 | if (frame_base == frame_addr) | |
7d8547c9 AC |
264 | return frame; |
265 | } | |
9d49bdc2 PA |
266 | |
267 | return NULL; | |
7d8547c9 AC |
268 | } |
269 | ||
5fa13070 SM |
270 | /* Creates a varobj (not its children). */ |
271 | ||
8b93c638 | 272 | struct varobj * |
2f408ecb PA |
273 | varobj_create (const char *objname, |
274 | const char *expression, CORE_ADDR frame, enum varobj_type type) | |
8b93c638 JM |
275 | { |
276 | struct varobj *var; | |
8b93c638 JM |
277 | struct cleanup *old_chain; |
278 | ||
581e13c1 | 279 | /* Fill out a varobj structure for the (root) variable being constructed. */ |
8b93c638 | 280 | var = new_root_variable (); |
74b7792f | 281 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
282 | |
283 | if (expression != NULL) | |
284 | { | |
e4195b40 | 285 | struct frame_info *fi; |
35633fef | 286 | struct frame_id old_id = null_frame_id; |
3977b71f | 287 | const struct block *block; |
bbc13ae3 | 288 | const char *p; |
e55dccf0 | 289 | struct value *value = NULL; |
1bb9788d | 290 | CORE_ADDR pc; |
8b93c638 | 291 | |
9d49bdc2 PA |
292 | /* Parse and evaluate the expression, filling in as much of the |
293 | variable's data as possible. */ | |
294 | ||
295 | if (has_stack_frames ()) | |
296 | { | |
581e13c1 | 297 | /* Allow creator to specify context of variable. */ |
9d49bdc2 PA |
298 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
299 | fi = get_selected_frame (NULL); | |
300 | else | |
301 | /* FIXME: cagney/2002-11-23: This code should be doing a | |
302 | lookup using the frame ID and not just the frame's | |
303 | ``address''. This, of course, means an interface | |
304 | change. However, with out that interface change ISAs, | |
305 | such as the ia64 with its two stacks, won't work. | |
306 | Similar goes for the case where there is a frameless | |
307 | function. */ | |
308 | fi = find_frame_addr_in_frame_chain (frame); | |
309 | } | |
8b93c638 | 310 | else |
9d49bdc2 | 311 | fi = NULL; |
8b93c638 | 312 | |
581e13c1 | 313 | /* frame = -2 means always use selected frame. */ |
73a93a32 | 314 | if (type == USE_SELECTED_FRAME) |
a5defcdc | 315 | var->root->floating = 1; |
73a93a32 | 316 | |
1bb9788d | 317 | pc = 0; |
8b93c638 JM |
318 | block = NULL; |
319 | if (fi != NULL) | |
1bb9788d TT |
320 | { |
321 | block = get_frame_block (fi, 0); | |
322 | pc = get_frame_pc (fi); | |
323 | } | |
8b93c638 JM |
324 | |
325 | p = expression; | |
326 | innermost_block = NULL; | |
73a93a32 | 327 | /* Wrap the call to parse expression, so we can |
581e13c1 | 328 | return a sensible error. */ |
492d29ea | 329 | TRY |
8e7b59a5 | 330 | { |
1bb9788d | 331 | var->root->exp = parse_exp_1 (&p, pc, block, 0); |
8e7b59a5 KS |
332 | } |
333 | ||
492d29ea | 334 | CATCH (except, RETURN_MASK_ERROR) |
73a93a32 | 335 | { |
f748fb40 | 336 | do_cleanups (old_chain); |
73a93a32 JI |
337 | return NULL; |
338 | } | |
492d29ea | 339 | END_CATCH |
8b93c638 | 340 | |
581e13c1 | 341 | /* Don't allow variables to be created for types. */ |
608b4967 TT |
342 | if (var->root->exp->elts[0].opcode == OP_TYPE |
343 | || var->root->exp->elts[0].opcode == OP_TYPEOF | |
344 | || var->root->exp->elts[0].opcode == OP_DECLTYPE) | |
8b93c638 JM |
345 | { |
346 | do_cleanups (old_chain); | |
bc8332bb AC |
347 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
348 | " as an expression.\n"); | |
8b93c638 JM |
349 | return NULL; |
350 | } | |
351 | ||
352 | var->format = variable_default_display (var); | |
353 | var->root->valid_block = innermost_block; | |
2f408ecb | 354 | var->name = expression; |
02142340 | 355 | /* For a root var, the name and the expr are the same. */ |
2f408ecb | 356 | var->path_expr = expression; |
8b93c638 JM |
357 | |
358 | /* When the frame is different from the current frame, | |
359 | we must select the appropriate frame before parsing | |
360 | the expression, otherwise the value will not be current. | |
581e13c1 | 361 | Since select_frame is so benign, just call it for all cases. */ |
4e22772d | 362 | if (innermost_block) |
8b93c638 | 363 | { |
4e22772d JK |
364 | /* User could specify explicit FRAME-ADDR which was not found but |
365 | EXPRESSION is frame specific and we would not be able to evaluate | |
366 | it correctly next time. With VALID_BLOCK set we must also set | |
367 | FRAME and THREAD_ID. */ | |
368 | if (fi == NULL) | |
369 | error (_("Failed to find the specified frame")); | |
370 | ||
7a424e99 | 371 | var->root->frame = get_frame_id (fi); |
5d5658a1 | 372 | var->root->thread_id = ptid_to_global_thread_id (inferior_ptid); |
35633fef | 373 | old_id = get_frame_id (get_selected_frame (NULL)); |
c5b48eac | 374 | select_frame (fi); |
8b93c638 JM |
375 | } |
376 | ||
340a7723 | 377 | /* We definitely need to catch errors here. |
8b93c638 | 378 | If evaluate_expression succeeds we got the value we wanted. |
581e13c1 | 379 | But if it fails, we still go on with a call to evaluate_type(). */ |
492d29ea | 380 | TRY |
8e7b59a5 | 381 | { |
4d01a485 | 382 | value = evaluate_expression (var->root->exp.get ()); |
8e7b59a5 | 383 | } |
492d29ea | 384 | CATCH (except, RETURN_MASK_ERROR) |
e55dccf0 VP |
385 | { |
386 | /* Error getting the value. Try to at least get the | |
387 | right type. */ | |
4d01a485 | 388 | struct value *type_only_value = evaluate_type (var->root->exp.get ()); |
a109c7c1 | 389 | |
e55dccf0 VP |
390 | var->type = value_type (type_only_value); |
391 | } | |
492d29ea | 392 | END_CATCH |
8264ba82 | 393 | |
492d29ea PA |
394 | if (value != NULL) |
395 | { | |
396 | int real_type_found = 0; | |
397 | ||
398 | var->type = value_actual_type (value, 0, &real_type_found); | |
399 | if (real_type_found) | |
400 | value = value_cast (var->type, value); | |
401 | } | |
acd65feb | 402 | |
8b93c638 | 403 | /* Set language info */ |
ca20d462 | 404 | var->root->lang_ops = var->root->exp->language_defn->la_varobj_ops; |
8b93c638 | 405 | |
d32cafc7 JB |
406 | install_new_value (var, value, 1 /* Initial assignment */); |
407 | ||
581e13c1 | 408 | /* Set ourselves as our root. */ |
8b93c638 JM |
409 | var->root->rootvar = var; |
410 | ||
581e13c1 | 411 | /* Reset the selected frame. */ |
35633fef JK |
412 | if (frame_id_p (old_id)) |
413 | select_frame (frame_find_by_id (old_id)); | |
8b93c638 JM |
414 | } |
415 | ||
73a93a32 | 416 | /* If the variable object name is null, that means this |
581e13c1 | 417 | is a temporary variable, so don't install it. */ |
73a93a32 JI |
418 | |
419 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 | 420 | { |
2f408ecb | 421 | var->obj_name = objname; |
8b93c638 JM |
422 | |
423 | /* If a varobj name is duplicated, the install will fail so | |
581e13c1 | 424 | we must cleanup. */ |
8b93c638 JM |
425 | if (!install_variable (var)) |
426 | { | |
427 | do_cleanups (old_chain); | |
428 | return NULL; | |
429 | } | |
430 | } | |
431 | ||
432 | discard_cleanups (old_chain); | |
433 | return var; | |
434 | } | |
435 | ||
581e13c1 | 436 | /* Generates an unique name that can be used for a varobj. */ |
8b93c638 JM |
437 | |
438 | char * | |
439 | varobj_gen_name (void) | |
440 | { | |
441 | static int id = 0; | |
e64d9b3d | 442 | char *obj_name; |
8b93c638 | 443 | |
581e13c1 | 444 | /* Generate a name for this object. */ |
8b93c638 | 445 | id++; |
b435e160 | 446 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 447 | |
e64d9b3d | 448 | return obj_name; |
8b93c638 JM |
449 | } |
450 | ||
61d8f275 JK |
451 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
452 | error if OBJNAME cannot be found. */ | |
8b93c638 JM |
453 | |
454 | struct varobj * | |
2f408ecb | 455 | varobj_get_handle (const char *objname) |
8b93c638 JM |
456 | { |
457 | struct vlist *cv; | |
458 | const char *chp; | |
459 | unsigned int index = 0; | |
460 | unsigned int i = 1; | |
461 | ||
462 | for (chp = objname; *chp; chp++) | |
463 | { | |
464 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
465 | } | |
466 | ||
467 | cv = *(varobj_table + index); | |
2f408ecb | 468 | while (cv != NULL && cv->var->obj_name != objname) |
8b93c638 JM |
469 | cv = cv->next; |
470 | ||
471 | if (cv == NULL) | |
8a3fe4f8 | 472 | error (_("Variable object not found")); |
8b93c638 JM |
473 | |
474 | return cv->var; | |
475 | } | |
476 | ||
581e13c1 | 477 | /* Given the handle, return the name of the object. */ |
8b93c638 | 478 | |
2f408ecb | 479 | const char * |
b09e2c59 | 480 | varobj_get_objname (const struct varobj *var) |
8b93c638 | 481 | { |
2f408ecb | 482 | return var->obj_name.c_str (); |
8b93c638 JM |
483 | } |
484 | ||
2f408ecb PA |
485 | /* Given the handle, return the expression represented by the |
486 | object. */ | |
8b93c638 | 487 | |
2f408ecb | 488 | std::string |
b09e2c59 | 489 | varobj_get_expression (const struct varobj *var) |
8b93c638 JM |
490 | { |
491 | return name_of_variable (var); | |
492 | } | |
493 | ||
30914ca8 | 494 | /* See varobj.h. */ |
8b93c638 JM |
495 | |
496 | int | |
30914ca8 | 497 | varobj_delete (struct varobj *var, int only_children) |
8b93c638 | 498 | { |
30914ca8 | 499 | return delete_variable (var, only_children); |
8b93c638 JM |
500 | } |
501 | ||
d8b65138 JK |
502 | #if HAVE_PYTHON |
503 | ||
b6313243 TT |
504 | /* Convenience function for varobj_set_visualizer. Instantiate a |
505 | pretty-printer for a given value. */ | |
506 | static PyObject * | |
507 | instantiate_pretty_printer (PyObject *constructor, struct value *value) | |
508 | { | |
b6313243 TT |
509 | PyObject *val_obj = NULL; |
510 | PyObject *printer; | |
b6313243 | 511 | |
b6313243 | 512 | val_obj = value_to_value_object (value); |
b6313243 TT |
513 | if (! val_obj) |
514 | return NULL; | |
515 | ||
516 | printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL); | |
517 | Py_DECREF (val_obj); | |
518 | return printer; | |
b6313243 TT |
519 | } |
520 | ||
d8b65138 JK |
521 | #endif |
522 | ||
581e13c1 | 523 | /* Set/Get variable object display format. */ |
8b93c638 JM |
524 | |
525 | enum varobj_display_formats | |
526 | varobj_set_display_format (struct varobj *var, | |
527 | enum varobj_display_formats format) | |
528 | { | |
529 | switch (format) | |
530 | { | |
531 | case FORMAT_NATURAL: | |
532 | case FORMAT_BINARY: | |
533 | case FORMAT_DECIMAL: | |
534 | case FORMAT_HEXADECIMAL: | |
535 | case FORMAT_OCTAL: | |
1c35a88f | 536 | case FORMAT_ZHEXADECIMAL: |
8b93c638 JM |
537 | var->format = format; |
538 | break; | |
539 | ||
540 | default: | |
541 | var->format = variable_default_display (var); | |
542 | } | |
543 | ||
ae7d22a6 VP |
544 | if (varobj_value_is_changeable_p (var) |
545 | && var->value && !value_lazy (var->value)) | |
546 | { | |
99ad9427 YQ |
547 | var->print_value = varobj_value_get_print_value (var->value, |
548 | var->format, var); | |
ae7d22a6 VP |
549 | } |
550 | ||
8b93c638 JM |
551 | return var->format; |
552 | } | |
553 | ||
554 | enum varobj_display_formats | |
b09e2c59 | 555 | varobj_get_display_format (const struct varobj *var) |
8b93c638 JM |
556 | { |
557 | return var->format; | |
558 | } | |
559 | ||
9b972014 | 560 | gdb::unique_xmalloc_ptr<char> |
b09e2c59 | 561 | varobj_get_display_hint (const struct varobj *var) |
b6313243 | 562 | { |
9b972014 | 563 | gdb::unique_xmalloc_ptr<char> result; |
b6313243 TT |
564 | |
565 | #if HAVE_PYTHON | |
0646da15 TT |
566 | struct cleanup *back_to; |
567 | ||
568 | if (!gdb_python_initialized) | |
569 | return NULL; | |
570 | ||
571 | back_to = varobj_ensure_python_env (var); | |
d452c4bc | 572 | |
bb5ce47a YQ |
573 | if (var->dynamic->pretty_printer != NULL) |
574 | result = gdbpy_get_display_hint (var->dynamic->pretty_printer); | |
d452c4bc UW |
575 | |
576 | do_cleanups (back_to); | |
b6313243 TT |
577 | #endif |
578 | ||
579 | return result; | |
580 | } | |
581 | ||
0cc7d26f TT |
582 | /* Return true if the varobj has items after TO, false otherwise. */ |
583 | ||
584 | int | |
b09e2c59 | 585 | varobj_has_more (const struct varobj *var, int to) |
0cc7d26f TT |
586 | { |
587 | if (VEC_length (varobj_p, var->children) > to) | |
588 | return 1; | |
589 | return ((to == -1 || VEC_length (varobj_p, var->children) == to) | |
bb5ce47a | 590 | && (var->dynamic->saved_item != NULL)); |
0cc7d26f TT |
591 | } |
592 | ||
c5b48eac VP |
593 | /* If the variable object is bound to a specific thread, that |
594 | is its evaluation can always be done in context of a frame | |
595 | inside that thread, returns GDB id of the thread -- which | |
581e13c1 | 596 | is always positive. Otherwise, returns -1. */ |
c5b48eac | 597 | int |
b09e2c59 | 598 | varobj_get_thread_id (const struct varobj *var) |
c5b48eac VP |
599 | { |
600 | if (var->root->valid_block && var->root->thread_id > 0) | |
601 | return var->root->thread_id; | |
602 | else | |
603 | return -1; | |
604 | } | |
605 | ||
25d5ea92 VP |
606 | void |
607 | varobj_set_frozen (struct varobj *var, int frozen) | |
608 | { | |
609 | /* When a variable is unfrozen, we don't fetch its value. | |
610 | The 'not_fetched' flag remains set, so next -var-update | |
611 | won't complain. | |
612 | ||
613 | We don't fetch the value, because for structures the client | |
614 | should do -var-update anyway. It would be bad to have different | |
615 | client-size logic for structure and other types. */ | |
616 | var->frozen = frozen; | |
617 | } | |
618 | ||
619 | int | |
b09e2c59 | 620 | varobj_get_frozen (const struct varobj *var) |
25d5ea92 VP |
621 | { |
622 | return var->frozen; | |
623 | } | |
624 | ||
0cc7d26f TT |
625 | /* A helper function that restricts a range to what is actually |
626 | available in a VEC. This follows the usual rules for the meaning | |
627 | of FROM and TO -- if either is negative, the entire range is | |
628 | used. */ | |
629 | ||
99ad9427 YQ |
630 | void |
631 | varobj_restrict_range (VEC (varobj_p) *children, int *from, int *to) | |
0cc7d26f TT |
632 | { |
633 | if (*from < 0 || *to < 0) | |
634 | { | |
635 | *from = 0; | |
636 | *to = VEC_length (varobj_p, children); | |
637 | } | |
638 | else | |
639 | { | |
640 | if (*from > VEC_length (varobj_p, children)) | |
641 | *from = VEC_length (varobj_p, children); | |
642 | if (*to > VEC_length (varobj_p, children)) | |
643 | *to = VEC_length (varobj_p, children); | |
644 | if (*from > *to) | |
645 | *from = *to; | |
646 | } | |
647 | } | |
648 | ||
649 | /* A helper for update_dynamic_varobj_children that installs a new | |
650 | child when needed. */ | |
651 | ||
652 | static void | |
653 | install_dynamic_child (struct varobj *var, | |
654 | VEC (varobj_p) **changed, | |
8264ba82 | 655 | VEC (varobj_p) **type_changed, |
fe978cb0 | 656 | VEC (varobj_p) **newobj, |
0cc7d26f TT |
657 | VEC (varobj_p) **unchanged, |
658 | int *cchanged, | |
659 | int index, | |
5a2e0d6e | 660 | struct varobj_item *item) |
0cc7d26f TT |
661 | { |
662 | if (VEC_length (varobj_p, var->children) < index + 1) | |
663 | { | |
664 | /* There's no child yet. */ | |
5a2e0d6e | 665 | struct varobj *child = varobj_add_child (var, item); |
a109c7c1 | 666 | |
fe978cb0 | 667 | if (newobj) |
0cc7d26f | 668 | { |
fe978cb0 | 669 | VEC_safe_push (varobj_p, *newobj, child); |
0cc7d26f TT |
670 | *cchanged = 1; |
671 | } | |
672 | } | |
bf8793bb | 673 | else |
0cc7d26f TT |
674 | { |
675 | varobj_p existing = VEC_index (varobj_p, var->children, index); | |
5a2e0d6e | 676 | int type_updated = update_type_if_necessary (existing, item->value); |
bf8793bb | 677 | |
8264ba82 AG |
678 | if (type_updated) |
679 | { | |
680 | if (type_changed) | |
681 | VEC_safe_push (varobj_p, *type_changed, existing); | |
682 | } | |
5a2e0d6e | 683 | if (install_new_value (existing, item->value, 0)) |
0cc7d26f | 684 | { |
8264ba82 | 685 | if (!type_updated && changed) |
0cc7d26f TT |
686 | VEC_safe_push (varobj_p, *changed, existing); |
687 | } | |
8264ba82 | 688 | else if (!type_updated && unchanged) |
0cc7d26f TT |
689 | VEC_safe_push (varobj_p, *unchanged, existing); |
690 | } | |
691 | } | |
692 | ||
576ea091 YQ |
693 | #if HAVE_PYTHON |
694 | ||
0cc7d26f | 695 | static int |
b09e2c59 | 696 | dynamic_varobj_has_child_method (const struct varobj *var) |
0cc7d26f TT |
697 | { |
698 | struct cleanup *back_to; | |
bb5ce47a | 699 | PyObject *printer = var->dynamic->pretty_printer; |
0cc7d26f TT |
700 | int result; |
701 | ||
0646da15 TT |
702 | if (!gdb_python_initialized) |
703 | return 0; | |
704 | ||
0cc7d26f TT |
705 | back_to = varobj_ensure_python_env (var); |
706 | result = PyObject_HasAttr (printer, gdbpy_children_cst); | |
707 | do_cleanups (back_to); | |
708 | return result; | |
709 | } | |
576ea091 | 710 | #endif |
0cc7d26f | 711 | |
e5250216 YQ |
712 | /* A factory for creating dynamic varobj's iterators. Returns an |
713 | iterator object suitable for iterating over VAR's children. */ | |
714 | ||
715 | static struct varobj_iter * | |
716 | varobj_get_iterator (struct varobj *var) | |
717 | { | |
576ea091 | 718 | #if HAVE_PYTHON |
e5250216 YQ |
719 | if (var->dynamic->pretty_printer) |
720 | return py_varobj_get_iterator (var, var->dynamic->pretty_printer); | |
576ea091 | 721 | #endif |
e5250216 YQ |
722 | |
723 | gdb_assert_not_reached (_("\ | |
724 | requested an iterator from a non-dynamic varobj")); | |
725 | } | |
726 | ||
827f100c YQ |
727 | /* Release and clear VAR's saved item, if any. */ |
728 | ||
729 | static void | |
730 | varobj_clear_saved_item (struct varobj_dynamic *var) | |
731 | { | |
732 | if (var->saved_item != NULL) | |
733 | { | |
734 | value_free (var->saved_item->value); | |
735 | xfree (var->saved_item); | |
736 | var->saved_item = NULL; | |
737 | } | |
738 | } | |
0cc7d26f | 739 | |
b6313243 TT |
740 | static int |
741 | update_dynamic_varobj_children (struct varobj *var, | |
742 | VEC (varobj_p) **changed, | |
8264ba82 | 743 | VEC (varobj_p) **type_changed, |
fe978cb0 | 744 | VEC (varobj_p) **newobj, |
0cc7d26f TT |
745 | VEC (varobj_p) **unchanged, |
746 | int *cchanged, | |
747 | int update_children, | |
748 | int from, | |
749 | int to) | |
b6313243 | 750 | { |
b6313243 | 751 | int i; |
b6313243 | 752 | |
b6313243 | 753 | *cchanged = 0; |
b6313243 | 754 | |
bb5ce47a | 755 | if (update_children || var->dynamic->child_iter == NULL) |
b6313243 | 756 | { |
e5250216 YQ |
757 | varobj_iter_delete (var->dynamic->child_iter); |
758 | var->dynamic->child_iter = varobj_get_iterator (var); | |
b6313243 | 759 | |
827f100c | 760 | varobj_clear_saved_item (var->dynamic); |
b6313243 | 761 | |
e5250216 | 762 | i = 0; |
b6313243 | 763 | |
bb5ce47a | 764 | if (var->dynamic->child_iter == NULL) |
827f100c | 765 | return 0; |
b6313243 | 766 | } |
0cc7d26f TT |
767 | else |
768 | i = VEC_length (varobj_p, var->children); | |
b6313243 | 769 | |
0cc7d26f TT |
770 | /* We ask for one extra child, so that MI can report whether there |
771 | are more children. */ | |
772 | for (; to < 0 || i < to + 1; ++i) | |
b6313243 | 773 | { |
827f100c | 774 | varobj_item *item; |
b6313243 | 775 | |
0cc7d26f | 776 | /* See if there was a leftover from last time. */ |
827f100c | 777 | if (var->dynamic->saved_item != NULL) |
0cc7d26f | 778 | { |
bb5ce47a YQ |
779 | item = var->dynamic->saved_item; |
780 | var->dynamic->saved_item = NULL; | |
0cc7d26f TT |
781 | } |
782 | else | |
a4c8e806 | 783 | { |
e5250216 | 784 | item = varobj_iter_next (var->dynamic->child_iter); |
827f100c YQ |
785 | /* Release vitem->value so its lifetime is not bound to the |
786 | execution of a command. */ | |
787 | if (item != NULL && item->value != NULL) | |
788 | release_value_or_incref (item->value); | |
a4c8e806 | 789 | } |
b6313243 | 790 | |
e5250216 YQ |
791 | if (item == NULL) |
792 | { | |
793 | /* Iteration is done. Remove iterator from VAR. */ | |
794 | varobj_iter_delete (var->dynamic->child_iter); | |
795 | var->dynamic->child_iter = NULL; | |
796 | break; | |
797 | } | |
0cc7d26f TT |
798 | /* We don't want to push the extra child on any report list. */ |
799 | if (to < 0 || i < to) | |
b6313243 | 800 | { |
0cc7d26f TT |
801 | int can_mention = from < 0 || i >= from; |
802 | ||
0cc7d26f | 803 | install_dynamic_child (var, can_mention ? changed : NULL, |
8264ba82 | 804 | can_mention ? type_changed : NULL, |
fe978cb0 | 805 | can_mention ? newobj : NULL, |
0cc7d26f | 806 | can_mention ? unchanged : NULL, |
5e5ac9a5 | 807 | can_mention ? cchanged : NULL, i, |
827f100c YQ |
808 | item); |
809 | ||
810 | xfree (item); | |
b6313243 | 811 | } |
0cc7d26f | 812 | else |
b6313243 | 813 | { |
bb5ce47a | 814 | var->dynamic->saved_item = item; |
b6313243 | 815 | |
0cc7d26f TT |
816 | /* We want to truncate the child list just before this |
817 | element. */ | |
818 | break; | |
819 | } | |
b6313243 TT |
820 | } |
821 | ||
822 | if (i < VEC_length (varobj_p, var->children)) | |
823 | { | |
0cc7d26f | 824 | int j; |
a109c7c1 | 825 | |
0cc7d26f TT |
826 | *cchanged = 1; |
827 | for (j = i; j < VEC_length (varobj_p, var->children); ++j) | |
30914ca8 | 828 | varobj_delete (VEC_index (varobj_p, var->children, j), 0); |
0cc7d26f | 829 | VEC_truncate (varobj_p, var->children, i); |
b6313243 | 830 | } |
0cc7d26f TT |
831 | |
832 | /* If there are fewer children than requested, note that the list of | |
833 | children changed. */ | |
834 | if (to >= 0 && VEC_length (varobj_p, var->children) < to) | |
835 | *cchanged = 1; | |
836 | ||
b6313243 | 837 | var->num_children = VEC_length (varobj_p, var->children); |
b6313243 | 838 | |
b6313243 | 839 | return 1; |
b6313243 | 840 | } |
25d5ea92 | 841 | |
8b93c638 JM |
842 | int |
843 | varobj_get_num_children (struct varobj *var) | |
844 | { | |
845 | if (var->num_children == -1) | |
b6313243 | 846 | { |
31f628ae | 847 | if (varobj_is_dynamic_p (var)) |
0cc7d26f TT |
848 | { |
849 | int dummy; | |
850 | ||
851 | /* If we have a dynamic varobj, don't report -1 children. | |
852 | So, try to fetch some children first. */ | |
8264ba82 | 853 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, &dummy, |
0cc7d26f TT |
854 | 0, 0, 0); |
855 | } | |
856 | else | |
b6313243 TT |
857 | var->num_children = number_of_children (var); |
858 | } | |
8b93c638 | 859 | |
0cc7d26f | 860 | return var->num_children >= 0 ? var->num_children : 0; |
8b93c638 JM |
861 | } |
862 | ||
863 | /* Creates a list of the immediate children of a variable object; | |
581e13c1 | 864 | the return code is the number of such children or -1 on error. */ |
8b93c638 | 865 | |
d56d46f5 | 866 | VEC (varobj_p)* |
0cc7d26f | 867 | varobj_list_children (struct varobj *var, int *from, int *to) |
8b93c638 | 868 | { |
b6313243 TT |
869 | int i, children_changed; |
870 | ||
bb5ce47a | 871 | var->dynamic->children_requested = 1; |
b6313243 | 872 | |
31f628ae | 873 | if (varobj_is_dynamic_p (var)) |
0cc7d26f | 874 | { |
b6313243 TT |
875 | /* This, in theory, can result in the number of children changing without |
876 | frontend noticing. But well, calling -var-list-children on the same | |
877 | varobj twice is not something a sane frontend would do. */ | |
8264ba82 AG |
878 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, |
879 | &children_changed, 0, 0, *to); | |
99ad9427 | 880 | varobj_restrict_range (var->children, from, to); |
0cc7d26f TT |
881 | return var->children; |
882 | } | |
8b93c638 | 883 | |
8b93c638 JM |
884 | if (var->num_children == -1) |
885 | var->num_children = number_of_children (var); | |
886 | ||
74a44383 DJ |
887 | /* If that failed, give up. */ |
888 | if (var->num_children == -1) | |
d56d46f5 | 889 | return var->children; |
74a44383 | 890 | |
28335dcc VP |
891 | /* If we're called when the list of children is not yet initialized, |
892 | allocate enough elements in it. */ | |
893 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
894 | VEC_safe_push (varobj_p, var->children, NULL); | |
895 | ||
8b93c638 JM |
896 | for (i = 0; i < var->num_children; i++) |
897 | { | |
d56d46f5 | 898 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
899 | |
900 | if (existing == NULL) | |
901 | { | |
902 | /* Either it's the first call to varobj_list_children for | |
903 | this variable object, and the child was never created, | |
904 | or it was explicitly deleted by the client. */ | |
2f408ecb | 905 | std::string name = name_of_child (var, i); |
28335dcc VP |
906 | existing = create_child (var, i, name); |
907 | VEC_replace (varobj_p, var->children, i, existing); | |
908 | } | |
8b93c638 JM |
909 | } |
910 | ||
99ad9427 | 911 | varobj_restrict_range (var->children, from, to); |
d56d46f5 | 912 | return var->children; |
8b93c638 JM |
913 | } |
914 | ||
b6313243 | 915 | static struct varobj * |
5a2e0d6e | 916 | varobj_add_child (struct varobj *var, struct varobj_item *item) |
b6313243 | 917 | { |
5a2e0d6e | 918 | varobj_p v = create_child_with_value (var, |
b6313243 | 919 | VEC_length (varobj_p, var->children), |
5a2e0d6e | 920 | item); |
a109c7c1 | 921 | |
b6313243 | 922 | VEC_safe_push (varobj_p, var->children, v); |
b6313243 TT |
923 | return v; |
924 | } | |
925 | ||
8b93c638 | 926 | /* Obtain the type of an object Variable as a string similar to the one gdb |
afa269ae SM |
927 | prints on the console. The caller is responsible for freeing the string. |
928 | */ | |
8b93c638 | 929 | |
2f408ecb | 930 | std::string |
8b93c638 JM |
931 | varobj_get_type (struct varobj *var) |
932 | { | |
8ab91b96 | 933 | /* For the "fake" variables, do not return a type. (Its type is |
8756216b DP |
934 | NULL, too.) |
935 | Do not return a type for invalid variables as well. */ | |
936 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
2f408ecb | 937 | return std::string (); |
8b93c638 | 938 | |
1a4300e9 | 939 | return type_to_string (var->type); |
8b93c638 JM |
940 | } |
941 | ||
1ecb4ee0 DJ |
942 | /* Obtain the type of an object variable. */ |
943 | ||
944 | struct type * | |
b09e2c59 | 945 | varobj_get_gdb_type (const struct varobj *var) |
1ecb4ee0 DJ |
946 | { |
947 | return var->type; | |
948 | } | |
949 | ||
85254831 KS |
950 | /* Is VAR a path expression parent, i.e., can it be used to construct |
951 | a valid path expression? */ | |
952 | ||
953 | static int | |
b09e2c59 | 954 | is_path_expr_parent (const struct varobj *var) |
85254831 | 955 | { |
9a9a7608 AB |
956 | gdb_assert (var->root->lang_ops->is_path_expr_parent != NULL); |
957 | return var->root->lang_ops->is_path_expr_parent (var); | |
958 | } | |
85254831 | 959 | |
9a9a7608 AB |
960 | /* Is VAR a path expression parent, i.e., can it be used to construct |
961 | a valid path expression? By default we assume any VAR can be a path | |
962 | parent. */ | |
85254831 | 963 | |
9a9a7608 | 964 | int |
b09e2c59 | 965 | varobj_default_is_path_expr_parent (const struct varobj *var) |
9a9a7608 AB |
966 | { |
967 | return 1; | |
85254831 KS |
968 | } |
969 | ||
970 | /* Return the path expression parent for VAR. */ | |
971 | ||
c1cc6152 SM |
972 | const struct varobj * |
973 | varobj_get_path_expr_parent (const struct varobj *var) | |
85254831 | 974 | { |
c1cc6152 | 975 | const struct varobj *parent = var; |
85254831 KS |
976 | |
977 | while (!is_root_p (parent) && !is_path_expr_parent (parent)) | |
978 | parent = parent->parent; | |
979 | ||
980 | return parent; | |
981 | } | |
982 | ||
02142340 VP |
983 | /* Return a pointer to the full rooted expression of varobj VAR. |
984 | If it has not been computed yet, compute it. */ | |
2f408ecb PA |
985 | |
986 | const char * | |
c1cc6152 | 987 | varobj_get_path_expr (const struct varobj *var) |
02142340 | 988 | { |
2f408ecb | 989 | if (var->path_expr.empty ()) |
02142340 VP |
990 | { |
991 | /* For root varobjs, we initialize path_expr | |
992 | when creating varobj, so here it should be | |
993 | child varobj. */ | |
c1cc6152 | 994 | struct varobj *mutable_var = (struct varobj *) var; |
02142340 | 995 | gdb_assert (!is_root_p (var)); |
2568868e | 996 | |
c1cc6152 | 997 | mutable_var->path_expr = (*var->root->lang_ops->path_expr_of_child) (var); |
02142340 | 998 | } |
2568868e | 999 | |
2f408ecb | 1000 | return var->path_expr.c_str (); |
02142340 VP |
1001 | } |
1002 | ||
fa4d0c40 | 1003 | const struct language_defn * |
b09e2c59 | 1004 | varobj_get_language (const struct varobj *var) |
8b93c638 | 1005 | { |
fa4d0c40 | 1006 | return var->root->exp->language_defn; |
8b93c638 JM |
1007 | } |
1008 | ||
1009 | int | |
b09e2c59 | 1010 | varobj_get_attributes (const struct varobj *var) |
8b93c638 JM |
1011 | { |
1012 | int attributes = 0; | |
1013 | ||
340a7723 | 1014 | if (varobj_editable_p (var)) |
581e13c1 | 1015 | /* FIXME: define masks for attributes. */ |
8b93c638 JM |
1016 | attributes |= 0x00000001; /* Editable */ |
1017 | ||
1018 | return attributes; | |
1019 | } | |
1020 | ||
cde5ef40 YQ |
1021 | /* Return true if VAR is a dynamic varobj. */ |
1022 | ||
0cc7d26f | 1023 | int |
b09e2c59 | 1024 | varobj_is_dynamic_p (const struct varobj *var) |
0cc7d26f | 1025 | { |
bb5ce47a | 1026 | return var->dynamic->pretty_printer != NULL; |
0cc7d26f TT |
1027 | } |
1028 | ||
2f408ecb | 1029 | std::string |
de051565 MK |
1030 | varobj_get_formatted_value (struct varobj *var, |
1031 | enum varobj_display_formats format) | |
1032 | { | |
1033 | return my_value_of_variable (var, format); | |
1034 | } | |
1035 | ||
2f408ecb | 1036 | std::string |
8b93c638 JM |
1037 | varobj_get_value (struct varobj *var) |
1038 | { | |
de051565 | 1039 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
1040 | } |
1041 | ||
1042 | /* Set the value of an object variable (if it is editable) to the | |
581e13c1 MS |
1043 | value of the given expression. */ |
1044 | /* Note: Invokes functions that can call error(). */ | |
8b93c638 JM |
1045 | |
1046 | int | |
2f408ecb | 1047 | varobj_set_value (struct varobj *var, const char *expression) |
8b93c638 | 1048 | { |
34365054 | 1049 | struct value *val = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1050 | /* The argument "expression" contains the variable's new value. |
581e13c1 MS |
1051 | We need to first construct a legal expression for this -- ugh! */ |
1052 | /* Does this cover all the bases? */ | |
34365054 | 1053 | struct value *value = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1054 | int saved_input_radix = input_radix; |
bbc13ae3 | 1055 | const char *s = expression; |
8b93c638 | 1056 | |
340a7723 | 1057 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 1058 | |
581e13c1 | 1059 | input_radix = 10; /* ALWAYS reset to decimal temporarily. */ |
4d01a485 | 1060 | expression_up exp = parse_exp_1 (&s, 0, 0, 0); |
492d29ea | 1061 | TRY |
8e7b59a5 | 1062 | { |
4d01a485 | 1063 | value = evaluate_expression (exp.get ()); |
8e7b59a5 KS |
1064 | } |
1065 | ||
492d29ea | 1066 | CATCH (except, RETURN_MASK_ERROR) |
340a7723 | 1067 | { |
581e13c1 | 1068 | /* We cannot proceed without a valid expression. */ |
340a7723 | 1069 | return 0; |
8b93c638 | 1070 | } |
492d29ea | 1071 | END_CATCH |
8b93c638 | 1072 | |
340a7723 NR |
1073 | /* All types that are editable must also be changeable. */ |
1074 | gdb_assert (varobj_value_is_changeable_p (var)); | |
1075 | ||
1076 | /* The value of a changeable variable object must not be lazy. */ | |
1077 | gdb_assert (!value_lazy (var->value)); | |
1078 | ||
1079 | /* Need to coerce the input. We want to check if the | |
1080 | value of the variable object will be different | |
1081 | after assignment, and the first thing value_assign | |
1082 | does is coerce the input. | |
1083 | For example, if we are assigning an array to a pointer variable we | |
b021a221 | 1084 | should compare the pointer with the array's address, not with the |
340a7723 NR |
1085 | array's content. */ |
1086 | value = coerce_array (value); | |
1087 | ||
8e7b59a5 KS |
1088 | /* The new value may be lazy. value_assign, or |
1089 | rather value_contents, will take care of this. */ | |
492d29ea | 1090 | TRY |
8e7b59a5 KS |
1091 | { |
1092 | val = value_assign (var->value, value); | |
1093 | } | |
1094 | ||
492d29ea PA |
1095 | CATCH (except, RETURN_MASK_ERROR) |
1096 | { | |
1097 | return 0; | |
1098 | } | |
1099 | END_CATCH | |
8e7b59a5 | 1100 | |
340a7723 NR |
1101 | /* If the value has changed, record it, so that next -var-update can |
1102 | report this change. If a variable had a value of '1', we've set it | |
1103 | to '333' and then set again to '1', when -var-update will report this | |
1104 | variable as changed -- because the first assignment has set the | |
1105 | 'updated' flag. There's no need to optimize that, because return value | |
1106 | of -var-update should be considered an approximation. */ | |
581e13c1 | 1107 | var->updated = install_new_value (var, val, 0 /* Compare values. */); |
340a7723 NR |
1108 | input_radix = saved_input_radix; |
1109 | return 1; | |
8b93c638 JM |
1110 | } |
1111 | ||
0cc7d26f TT |
1112 | #if HAVE_PYTHON |
1113 | ||
1114 | /* A helper function to install a constructor function and visualizer | |
bb5ce47a | 1115 | in a varobj_dynamic. */ |
0cc7d26f TT |
1116 | |
1117 | static void | |
bb5ce47a | 1118 | install_visualizer (struct varobj_dynamic *var, PyObject *constructor, |
0cc7d26f TT |
1119 | PyObject *visualizer) |
1120 | { | |
1121 | Py_XDECREF (var->constructor); | |
1122 | var->constructor = constructor; | |
1123 | ||
1124 | Py_XDECREF (var->pretty_printer); | |
1125 | var->pretty_printer = visualizer; | |
1126 | ||
e5250216 | 1127 | varobj_iter_delete (var->child_iter); |
0cc7d26f TT |
1128 | var->child_iter = NULL; |
1129 | } | |
1130 | ||
1131 | /* Install the default visualizer for VAR. */ | |
1132 | ||
1133 | static void | |
1134 | install_default_visualizer (struct varobj *var) | |
1135 | { | |
d65aec65 PM |
1136 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1137 | if (CPLUS_FAKE_CHILD (var)) | |
1138 | return; | |
1139 | ||
0cc7d26f TT |
1140 | if (pretty_printing) |
1141 | { | |
1142 | PyObject *pretty_printer = NULL; | |
1143 | ||
1144 | if (var->value) | |
1145 | { | |
1146 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value); | |
1147 | if (! pretty_printer) | |
1148 | { | |
1149 | gdbpy_print_stack (); | |
1150 | error (_("Cannot instantiate printer for default visualizer")); | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | if (pretty_printer == Py_None) | |
1155 | { | |
1156 | Py_DECREF (pretty_printer); | |
1157 | pretty_printer = NULL; | |
1158 | } | |
1159 | ||
bb5ce47a | 1160 | install_visualizer (var->dynamic, NULL, pretty_printer); |
0cc7d26f TT |
1161 | } |
1162 | } | |
1163 | ||
1164 | /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to | |
1165 | make a new object. */ | |
1166 | ||
1167 | static void | |
1168 | construct_visualizer (struct varobj *var, PyObject *constructor) | |
1169 | { | |
1170 | PyObject *pretty_printer; | |
1171 | ||
d65aec65 PM |
1172 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1173 | if (CPLUS_FAKE_CHILD (var)) | |
1174 | return; | |
1175 | ||
0cc7d26f TT |
1176 | Py_INCREF (constructor); |
1177 | if (constructor == Py_None) | |
1178 | pretty_printer = NULL; | |
1179 | else | |
1180 | { | |
1181 | pretty_printer = instantiate_pretty_printer (constructor, var->value); | |
1182 | if (! pretty_printer) | |
1183 | { | |
1184 | gdbpy_print_stack (); | |
1185 | Py_DECREF (constructor); | |
1186 | constructor = Py_None; | |
1187 | Py_INCREF (constructor); | |
1188 | } | |
1189 | ||
1190 | if (pretty_printer == Py_None) | |
1191 | { | |
1192 | Py_DECREF (pretty_printer); | |
1193 | pretty_printer = NULL; | |
1194 | } | |
1195 | } | |
1196 | ||
bb5ce47a | 1197 | install_visualizer (var->dynamic, constructor, pretty_printer); |
0cc7d26f TT |
1198 | } |
1199 | ||
1200 | #endif /* HAVE_PYTHON */ | |
1201 | ||
1202 | /* A helper function for install_new_value. This creates and installs | |
1203 | a visualizer for VAR, if appropriate. */ | |
1204 | ||
1205 | static void | |
1206 | install_new_value_visualizer (struct varobj *var) | |
1207 | { | |
1208 | #if HAVE_PYTHON | |
1209 | /* If the constructor is None, then we want the raw value. If VAR | |
1210 | does not have a value, just skip this. */ | |
0646da15 TT |
1211 | if (!gdb_python_initialized) |
1212 | return; | |
1213 | ||
bb5ce47a | 1214 | if (var->dynamic->constructor != Py_None && var->value != NULL) |
0cc7d26f TT |
1215 | { |
1216 | struct cleanup *cleanup; | |
0cc7d26f TT |
1217 | |
1218 | cleanup = varobj_ensure_python_env (var); | |
1219 | ||
bb5ce47a | 1220 | if (var->dynamic->constructor == NULL) |
0cc7d26f TT |
1221 | install_default_visualizer (var); |
1222 | else | |
bb5ce47a | 1223 | construct_visualizer (var, var->dynamic->constructor); |
0cc7d26f TT |
1224 | |
1225 | do_cleanups (cleanup); | |
1226 | } | |
1227 | #else | |
1228 | /* Do nothing. */ | |
1229 | #endif | |
1230 | } | |
1231 | ||
8264ba82 AG |
1232 | /* When using RTTI to determine variable type it may be changed in runtime when |
1233 | the variable value is changed. This function checks whether type of varobj | |
1234 | VAR will change when a new value NEW_VALUE is assigned and if it is so | |
1235 | updates the type of VAR. */ | |
1236 | ||
1237 | static int | |
1238 | update_type_if_necessary (struct varobj *var, struct value *new_value) | |
1239 | { | |
1240 | if (new_value) | |
1241 | { | |
1242 | struct value_print_options opts; | |
1243 | ||
1244 | get_user_print_options (&opts); | |
1245 | if (opts.objectprint) | |
1246 | { | |
2f408ecb PA |
1247 | struct type *new_type = value_actual_type (new_value, 0, 0); |
1248 | std::string new_type_str = type_to_string (new_type); | |
1249 | std::string curr_type_str = varobj_get_type (var); | |
8264ba82 | 1250 | |
2f408ecb PA |
1251 | /* Did the type name change? */ |
1252 | if (curr_type_str != new_type_str) | |
8264ba82 AG |
1253 | { |
1254 | var->type = new_type; | |
1255 | ||
1256 | /* This information may be not valid for a new type. */ | |
30914ca8 | 1257 | varobj_delete (var, 1); |
8264ba82 AG |
1258 | VEC_free (varobj_p, var->children); |
1259 | var->num_children = -1; | |
1260 | return 1; | |
1261 | } | |
1262 | } | |
1263 | } | |
1264 | ||
1265 | return 0; | |
1266 | } | |
1267 | ||
acd65feb VP |
1268 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
1269 | this is the first assignement after the variable object was just | |
1270 | created, or changed type. In that case, just assign the value | |
1271 | and return 0. | |
581e13c1 MS |
1272 | Otherwise, assign the new value, and return 1 if the value is |
1273 | different from the current one, 0 otherwise. The comparison is | |
1274 | done on textual representation of value. Therefore, some types | |
1275 | need not be compared. E.g. for structures the reported value is | |
1276 | always "{...}", so no comparison is necessary here. If the old | |
1277 | value was NULL and new one is not, or vice versa, we always return 1. | |
b26ed50d VP |
1278 | |
1279 | The VALUE parameter should not be released -- the function will | |
1280 | take care of releasing it when needed. */ | |
acd65feb VP |
1281 | static int |
1282 | install_new_value (struct varobj *var, struct value *value, int initial) | |
1283 | { | |
1284 | int changeable; | |
1285 | int need_to_fetch; | |
1286 | int changed = 0; | |
25d5ea92 | 1287 | int intentionally_not_fetched = 0; |
acd65feb | 1288 | |
acd65feb | 1289 | /* We need to know the varobj's type to decide if the value should |
3e43a32a | 1290 | be fetched or not. C++ fake children (public/protected/private) |
581e13c1 | 1291 | don't have a type. */ |
acd65feb | 1292 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); |
b2c2bd75 | 1293 | changeable = varobj_value_is_changeable_p (var); |
b6313243 TT |
1294 | |
1295 | /* If the type has custom visualizer, we consider it to be always | |
581e13c1 | 1296 | changeable. FIXME: need to make sure this behaviour will not |
b6313243 | 1297 | mess up read-sensitive values. */ |
bb5ce47a | 1298 | if (var->dynamic->pretty_printer != NULL) |
b6313243 TT |
1299 | changeable = 1; |
1300 | ||
acd65feb VP |
1301 | need_to_fetch = changeable; |
1302 | ||
b26ed50d VP |
1303 | /* We are not interested in the address of references, and given |
1304 | that in C++ a reference is not rebindable, it cannot | |
1305 | meaningfully change. So, get hold of the real value. */ | |
1306 | if (value) | |
0cc7d26f | 1307 | value = coerce_ref (value); |
b26ed50d | 1308 | |
acd65feb VP |
1309 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1310 | /* For unions, we need to fetch the value implicitly because | |
1311 | of implementation of union member fetch. When gdb | |
1312 | creates a value for a field and the value of the enclosing | |
1313 | structure is not lazy, it immediately copies the necessary | |
1314 | bytes from the enclosing values. If the enclosing value is | |
1315 | lazy, the call to value_fetch_lazy on the field will read | |
1316 | the data from memory. For unions, that means we'll read the | |
1317 | same memory more than once, which is not desirable. So | |
1318 | fetch now. */ | |
1319 | need_to_fetch = 1; | |
1320 | ||
1321 | /* The new value might be lazy. If the type is changeable, | |
1322 | that is we'll be comparing values of this type, fetch the | |
1323 | value now. Otherwise, on the next update the old value | |
1324 | will be lazy, which means we've lost that old value. */ | |
1325 | if (need_to_fetch && value && value_lazy (value)) | |
1326 | { | |
c1cc6152 | 1327 | const struct varobj *parent = var->parent; |
25d5ea92 | 1328 | int frozen = var->frozen; |
a109c7c1 | 1329 | |
25d5ea92 VP |
1330 | for (; !frozen && parent; parent = parent->parent) |
1331 | frozen |= parent->frozen; | |
1332 | ||
1333 | if (frozen && initial) | |
1334 | { | |
1335 | /* For variables that are frozen, or are children of frozen | |
1336 | variables, we don't do fetch on initial assignment. | |
1337 | For non-initial assignemnt we do the fetch, since it means we're | |
1338 | explicitly asked to compare the new value with the old one. */ | |
1339 | intentionally_not_fetched = 1; | |
1340 | } | |
8e7b59a5 | 1341 | else |
acd65feb | 1342 | { |
8e7b59a5 | 1343 | |
492d29ea | 1344 | TRY |
8e7b59a5 KS |
1345 | { |
1346 | value_fetch_lazy (value); | |
1347 | } | |
1348 | ||
492d29ea | 1349 | CATCH (except, RETURN_MASK_ERROR) |
8e7b59a5 KS |
1350 | { |
1351 | /* Set the value to NULL, so that for the next -var-update, | |
1352 | we don't try to compare the new value with this value, | |
1353 | that we couldn't even read. */ | |
1354 | value = NULL; | |
1355 | } | |
492d29ea | 1356 | END_CATCH |
acd65feb | 1357 | } |
acd65feb VP |
1358 | } |
1359 | ||
e848a8a5 TT |
1360 | /* Get a reference now, before possibly passing it to any Python |
1361 | code that might release it. */ | |
1362 | if (value != NULL) | |
1363 | value_incref (value); | |
b6313243 | 1364 | |
7a4d50bf VP |
1365 | /* Below, we'll be comparing string rendering of old and new |
1366 | values. Don't get string rendering if the value is | |
1367 | lazy -- if it is, the code above has decided that the value | |
1368 | should not be fetched. */ | |
2f408ecb | 1369 | std::string print_value; |
bb5ce47a YQ |
1370 | if (value != NULL && !value_lazy (value) |
1371 | && var->dynamic->pretty_printer == NULL) | |
99ad9427 | 1372 | print_value = varobj_value_get_print_value (value, var->format, var); |
7a4d50bf | 1373 | |
acd65feb VP |
1374 | /* If the type is changeable, compare the old and the new values. |
1375 | If this is the initial assignment, we don't have any old value | |
1376 | to compare with. */ | |
7a4d50bf | 1377 | if (!initial && changeable) |
acd65feb | 1378 | { |
3e43a32a MS |
1379 | /* If the value of the varobj was changed by -var-set-value, |
1380 | then the value in the varobj and in the target is the same. | |
1381 | However, that value is different from the value that the | |
581e13c1 | 1382 | varobj had after the previous -var-update. So need to the |
3e43a32a | 1383 | varobj as changed. */ |
acd65feb | 1384 | if (var->updated) |
57e66780 | 1385 | { |
57e66780 DJ |
1386 | changed = 1; |
1387 | } | |
bb5ce47a | 1388 | else if (var->dynamic->pretty_printer == NULL) |
acd65feb VP |
1389 | { |
1390 | /* Try to compare the values. That requires that both | |
1391 | values are non-lazy. */ | |
25d5ea92 VP |
1392 | if (var->not_fetched && value_lazy (var->value)) |
1393 | { | |
1394 | /* This is a frozen varobj and the value was never read. | |
1395 | Presumably, UI shows some "never read" indicator. | |
1396 | Now that we've fetched the real value, we need to report | |
1397 | this varobj as changed so that UI can show the real | |
1398 | value. */ | |
1399 | changed = 1; | |
1400 | } | |
1401 | else if (var->value == NULL && value == NULL) | |
581e13c1 | 1402 | /* Equal. */ |
acd65feb VP |
1403 | ; |
1404 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1405 | { |
57e66780 DJ |
1406 | changed = 1; |
1407 | } | |
acd65feb VP |
1408 | else |
1409 | { | |
1410 | gdb_assert (!value_lazy (var->value)); | |
1411 | gdb_assert (!value_lazy (value)); | |
85265413 | 1412 | |
2f408ecb PA |
1413 | gdb_assert (!var->print_value.empty () && !print_value.empty ()); |
1414 | if (var->print_value != print_value) | |
7a4d50bf | 1415 | changed = 1; |
acd65feb VP |
1416 | } |
1417 | } | |
1418 | } | |
85265413 | 1419 | |
ee342b23 VP |
1420 | if (!initial && !changeable) |
1421 | { | |
1422 | /* For values that are not changeable, we don't compare the values. | |
1423 | However, we want to notice if a value was not NULL and now is NULL, | |
1424 | or vise versa, so that we report when top-level varobjs come in scope | |
1425 | and leave the scope. */ | |
1426 | changed = (var->value != NULL) != (value != NULL); | |
1427 | } | |
1428 | ||
acd65feb | 1429 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1430 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1431 | value_free (var->value); |
1432 | var->value = value; | |
25d5ea92 VP |
1433 | if (value && value_lazy (value) && intentionally_not_fetched) |
1434 | var->not_fetched = 1; | |
1435 | else | |
1436 | var->not_fetched = 0; | |
acd65feb | 1437 | var->updated = 0; |
85265413 | 1438 | |
0cc7d26f TT |
1439 | install_new_value_visualizer (var); |
1440 | ||
1441 | /* If we installed a pretty-printer, re-compare the printed version | |
1442 | to see if the variable changed. */ | |
bb5ce47a | 1443 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f | 1444 | { |
99ad9427 YQ |
1445 | print_value = varobj_value_get_print_value (var->value, var->format, |
1446 | var); | |
2f408ecb PA |
1447 | if ((var->print_value.empty () && !print_value.empty ()) |
1448 | || (!var->print_value.empty () && print_value.empty ()) | |
1449 | || (!var->print_value.empty () && !print_value.empty () | |
1450 | && var->print_value != print_value)) | |
1451 | changed = 1; | |
0cc7d26f | 1452 | } |
0cc7d26f TT |
1453 | var->print_value = print_value; |
1454 | ||
b26ed50d | 1455 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1456 | |
1457 | return changed; | |
1458 | } | |
acd65feb | 1459 | |
0cc7d26f TT |
1460 | /* Return the requested range for a varobj. VAR is the varobj. FROM |
1461 | and TO are out parameters; *FROM and *TO will be set to the | |
1462 | selected sub-range of VAR. If no range was selected using | |
1463 | -var-set-update-range, then both will be -1. */ | |
1464 | void | |
b09e2c59 | 1465 | varobj_get_child_range (const struct varobj *var, int *from, int *to) |
b6313243 | 1466 | { |
0cc7d26f TT |
1467 | *from = var->from; |
1468 | *to = var->to; | |
b6313243 TT |
1469 | } |
1470 | ||
0cc7d26f TT |
1471 | /* Set the selected sub-range of children of VAR to start at index |
1472 | FROM and end at index TO. If either FROM or TO is less than zero, | |
1473 | this is interpreted as a request for all children. */ | |
1474 | void | |
1475 | varobj_set_child_range (struct varobj *var, int from, int to) | |
b6313243 | 1476 | { |
0cc7d26f TT |
1477 | var->from = from; |
1478 | var->to = to; | |
b6313243 TT |
1479 | } |
1480 | ||
1481 | void | |
1482 | varobj_set_visualizer (struct varobj *var, const char *visualizer) | |
1483 | { | |
1484 | #if HAVE_PYTHON | |
34fa1d9d MS |
1485 | PyObject *mainmod, *globals, *constructor; |
1486 | struct cleanup *back_to; | |
b6313243 | 1487 | |
0646da15 TT |
1488 | if (!gdb_python_initialized) |
1489 | return; | |
1490 | ||
d452c4bc | 1491 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
1492 | |
1493 | mainmod = PyImport_AddModule ("__main__"); | |
1494 | globals = PyModule_GetDict (mainmod); | |
1495 | Py_INCREF (globals); | |
1496 | make_cleanup_py_decref (globals); | |
1497 | ||
1498 | constructor = PyRun_String (visualizer, Py_eval_input, globals, globals); | |
b6313243 | 1499 | |
0cc7d26f | 1500 | if (! constructor) |
b6313243 TT |
1501 | { |
1502 | gdbpy_print_stack (); | |
da1f2771 | 1503 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
b6313243 TT |
1504 | } |
1505 | ||
0cc7d26f TT |
1506 | construct_visualizer (var, constructor); |
1507 | Py_XDECREF (constructor); | |
b6313243 | 1508 | |
0cc7d26f | 1509 | /* If there are any children now, wipe them. */ |
30914ca8 | 1510 | varobj_delete (var, 1 /* children only */); |
0cc7d26f | 1511 | var->num_children = -1; |
b6313243 TT |
1512 | |
1513 | do_cleanups (back_to); | |
1514 | #else | |
da1f2771 | 1515 | error (_("Python support required")); |
b6313243 TT |
1516 | #endif |
1517 | } | |
1518 | ||
7a290c40 JB |
1519 | /* If NEW_VALUE is the new value of the given varobj (var), return |
1520 | non-zero if var has mutated. In other words, if the type of | |
1521 | the new value is different from the type of the varobj's old | |
1522 | value. | |
1523 | ||
1524 | NEW_VALUE may be NULL, if the varobj is now out of scope. */ | |
1525 | ||
1526 | static int | |
b09e2c59 | 1527 | varobj_value_has_mutated (const struct varobj *var, struct value *new_value, |
7a290c40 JB |
1528 | struct type *new_type) |
1529 | { | |
1530 | /* If we haven't previously computed the number of children in var, | |
1531 | it does not matter from the front-end's perspective whether | |
1532 | the type has mutated or not. For all intents and purposes, | |
1533 | it has not mutated. */ | |
1534 | if (var->num_children < 0) | |
1535 | return 0; | |
1536 | ||
ca20d462 | 1537 | if (var->root->lang_ops->value_has_mutated) |
8776cfe9 JB |
1538 | { |
1539 | /* The varobj module, when installing new values, explicitly strips | |
1540 | references, saying that we're not interested in those addresses. | |
1541 | But detection of mutation happens before installing the new | |
1542 | value, so our value may be a reference that we need to strip | |
1543 | in order to remain consistent. */ | |
1544 | if (new_value != NULL) | |
1545 | new_value = coerce_ref (new_value); | |
1546 | return var->root->lang_ops->value_has_mutated (var, new_value, new_type); | |
1547 | } | |
7a290c40 JB |
1548 | else |
1549 | return 0; | |
1550 | } | |
1551 | ||
8b93c638 JM |
1552 | /* Update the values for a variable and its children. This is a |
1553 | two-pronged attack. First, re-parse the value for the root's | |
1554 | expression to see if it's changed. Then go all the way | |
1555 | through its children, reconstructing them and noting if they've | |
1556 | changed. | |
1557 | ||
25d5ea92 VP |
1558 | The EXPLICIT parameter specifies if this call is result |
1559 | of MI request to update this specific variable, or | |
581e13c1 | 1560 | result of implicit -var-update *. For implicit request, we don't |
25d5ea92 | 1561 | update frozen variables. |
705da579 | 1562 | |
581e13c1 | 1563 | NOTE: This function may delete the caller's varobj. If it |
8756216b DP |
1564 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1565 | to point to the new varobj. */ | |
8b93c638 | 1566 | |
1417b39d | 1567 | VEC(varobj_update_result) * |
fe978cb0 | 1568 | varobj_update (struct varobj **varp, int is_explicit) |
8b93c638 | 1569 | { |
25d5ea92 | 1570 | int type_changed = 0; |
8b93c638 | 1571 | int i; |
fe978cb0 | 1572 | struct value *newobj; |
b6313243 | 1573 | VEC (varobj_update_result) *stack = NULL; |
f7f9ae2c | 1574 | VEC (varobj_update_result) *result = NULL; |
8b93c638 | 1575 | |
25d5ea92 VP |
1576 | /* Frozen means frozen -- we don't check for any change in |
1577 | this varobj, including its going out of scope, or | |
1578 | changing type. One use case for frozen varobjs is | |
1579 | retaining previously evaluated expressions, and we don't | |
1580 | want them to be reevaluated at all. */ | |
fe978cb0 | 1581 | if (!is_explicit && (*varp)->frozen) |
f7f9ae2c | 1582 | return result; |
8756216b DP |
1583 | |
1584 | if (!(*varp)->root->is_valid) | |
f7f9ae2c | 1585 | { |
cfce2ea2 | 1586 | varobj_update_result r = {0}; |
a109c7c1 | 1587 | |
cfce2ea2 | 1588 | r.varobj = *varp; |
f7f9ae2c VP |
1589 | r.status = VAROBJ_INVALID; |
1590 | VEC_safe_push (varobj_update_result, result, &r); | |
1591 | return result; | |
1592 | } | |
8b93c638 | 1593 | |
25d5ea92 | 1594 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1595 | { |
cfce2ea2 | 1596 | varobj_update_result r = {0}; |
a109c7c1 | 1597 | |
cfce2ea2 | 1598 | r.varobj = *varp; |
f7f9ae2c VP |
1599 | r.status = VAROBJ_IN_SCOPE; |
1600 | ||
581e13c1 | 1601 | /* Update the root variable. value_of_root can return NULL |
25d5ea92 | 1602 | if the variable is no longer around, i.e. we stepped out of |
581e13c1 | 1603 | the frame in which a local existed. We are letting the |
25d5ea92 VP |
1604 | value_of_root variable dispose of the varobj if the type |
1605 | has changed. */ | |
fe978cb0 PA |
1606 | newobj = value_of_root (varp, &type_changed); |
1607 | if (update_type_if_necessary(*varp, newobj)) | |
8264ba82 | 1608 | type_changed = 1; |
f7f9ae2c | 1609 | r.varobj = *varp; |
f7f9ae2c | 1610 | r.type_changed = type_changed; |
fe978cb0 | 1611 | if (install_new_value ((*varp), newobj, type_changed)) |
f7f9ae2c | 1612 | r.changed = 1; |
ea56f9c2 | 1613 | |
fe978cb0 | 1614 | if (newobj == NULL) |
f7f9ae2c | 1615 | r.status = VAROBJ_NOT_IN_SCOPE; |
b6313243 | 1616 | r.value_installed = 1; |
f7f9ae2c VP |
1617 | |
1618 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
b6313243 | 1619 | { |
0b4bc29a JK |
1620 | if (r.type_changed || r.changed) |
1621 | VEC_safe_push (varobj_update_result, result, &r); | |
b6313243 TT |
1622 | return result; |
1623 | } | |
1624 | ||
1625 | VEC_safe_push (varobj_update_result, stack, &r); | |
1626 | } | |
1627 | else | |
1628 | { | |
cfce2ea2 | 1629 | varobj_update_result r = {0}; |
a109c7c1 | 1630 | |
cfce2ea2 | 1631 | r.varobj = *varp; |
b6313243 | 1632 | VEC_safe_push (varobj_update_result, stack, &r); |
b20d8971 | 1633 | } |
8b93c638 | 1634 | |
8756216b | 1635 | /* Walk through the children, reconstructing them all. */ |
b6313243 | 1636 | while (!VEC_empty (varobj_update_result, stack)) |
8b93c638 | 1637 | { |
b6313243 TT |
1638 | varobj_update_result r = *(VEC_last (varobj_update_result, stack)); |
1639 | struct varobj *v = r.varobj; | |
1640 | ||
1641 | VEC_pop (varobj_update_result, stack); | |
1642 | ||
1643 | /* Update this variable, unless it's a root, which is already | |
1644 | updated. */ | |
1645 | if (!r.value_installed) | |
7a290c40 JB |
1646 | { |
1647 | struct type *new_type; | |
1648 | ||
fe978cb0 PA |
1649 | newobj = value_of_child (v->parent, v->index); |
1650 | if (update_type_if_necessary(v, newobj)) | |
8264ba82 | 1651 | r.type_changed = 1; |
fe978cb0 PA |
1652 | if (newobj) |
1653 | new_type = value_type (newobj); | |
7a290c40 | 1654 | else |
ca20d462 | 1655 | new_type = v->root->lang_ops->type_of_child (v->parent, v->index); |
7a290c40 | 1656 | |
fe978cb0 | 1657 | if (varobj_value_has_mutated (v, newobj, new_type)) |
7a290c40 JB |
1658 | { |
1659 | /* The children are no longer valid; delete them now. | |
1660 | Report the fact that its type changed as well. */ | |
30914ca8 | 1661 | varobj_delete (v, 1 /* only_children */); |
7a290c40 JB |
1662 | v->num_children = -1; |
1663 | v->to = -1; | |
1664 | v->from = -1; | |
1665 | v->type = new_type; | |
1666 | r.type_changed = 1; | |
1667 | } | |
1668 | ||
fe978cb0 | 1669 | if (install_new_value (v, newobj, r.type_changed)) |
b6313243 TT |
1670 | { |
1671 | r.changed = 1; | |
1672 | v->updated = 0; | |
1673 | } | |
1674 | } | |
1675 | ||
31f628ae YQ |
1676 | /* We probably should not get children of a dynamic varobj, but |
1677 | for which -var-list-children was never invoked. */ | |
1678 | if (varobj_is_dynamic_p (v)) | |
b6313243 | 1679 | { |
8264ba82 | 1680 | VEC (varobj_p) *changed = 0, *type_changed = 0, *unchanged = 0; |
fe978cb0 | 1681 | VEC (varobj_p) *newobj = 0; |
26f9bcee | 1682 | int i, children_changed = 0; |
b6313243 TT |
1683 | |
1684 | if (v->frozen) | |
1685 | continue; | |
1686 | ||
bb5ce47a | 1687 | if (!v->dynamic->children_requested) |
0cc7d26f TT |
1688 | { |
1689 | int dummy; | |
1690 | ||
1691 | /* If we initially did not have potential children, but | |
1692 | now we do, consider the varobj as changed. | |
1693 | Otherwise, if children were never requested, consider | |
1694 | it as unchanged -- presumably, such varobj is not yet | |
1695 | expanded in the UI, so we need not bother getting | |
1696 | it. */ | |
1697 | if (!varobj_has_more (v, 0)) | |
1698 | { | |
8264ba82 | 1699 | update_dynamic_varobj_children (v, NULL, NULL, NULL, NULL, |
0cc7d26f TT |
1700 | &dummy, 0, 0, 0); |
1701 | if (varobj_has_more (v, 0)) | |
1702 | r.changed = 1; | |
1703 | } | |
1704 | ||
1705 | if (r.changed) | |
1706 | VEC_safe_push (varobj_update_result, result, &r); | |
1707 | ||
1708 | continue; | |
1709 | } | |
1710 | ||
b6313243 TT |
1711 | /* If update_dynamic_varobj_children returns 0, then we have |
1712 | a non-conforming pretty-printer, so we skip it. */ | |
fe978cb0 | 1713 | if (update_dynamic_varobj_children (v, &changed, &type_changed, &newobj, |
8264ba82 | 1714 | &unchanged, &children_changed, 1, |
0cc7d26f | 1715 | v->from, v->to)) |
b6313243 | 1716 | { |
fe978cb0 | 1717 | if (children_changed || newobj) |
b6313243 | 1718 | { |
0cc7d26f | 1719 | r.children_changed = 1; |
fe978cb0 | 1720 | r.newobj = newobj; |
b6313243 | 1721 | } |
0cc7d26f TT |
1722 | /* Push in reverse order so that the first child is |
1723 | popped from the work stack first, and so will be | |
1724 | added to result first. This does not affect | |
1725 | correctness, just "nicer". */ | |
8264ba82 AG |
1726 | for (i = VEC_length (varobj_p, type_changed) - 1; i >= 0; --i) |
1727 | { | |
1728 | varobj_p tmp = VEC_index (varobj_p, type_changed, i); | |
1729 | varobj_update_result r = {0}; | |
1730 | ||
1731 | /* Type may change only if value was changed. */ | |
1732 | r.varobj = tmp; | |
1733 | r.changed = 1; | |
1734 | r.type_changed = 1; | |
1735 | r.value_installed = 1; | |
1736 | VEC_safe_push (varobj_update_result, stack, &r); | |
1737 | } | |
0cc7d26f | 1738 | for (i = VEC_length (varobj_p, changed) - 1; i >= 0; --i) |
b6313243 | 1739 | { |
0cc7d26f | 1740 | varobj_p tmp = VEC_index (varobj_p, changed, i); |
cfce2ea2 | 1741 | varobj_update_result r = {0}; |
a109c7c1 | 1742 | |
cfce2ea2 | 1743 | r.varobj = tmp; |
0cc7d26f | 1744 | r.changed = 1; |
b6313243 TT |
1745 | r.value_installed = 1; |
1746 | VEC_safe_push (varobj_update_result, stack, &r); | |
1747 | } | |
0cc7d26f TT |
1748 | for (i = VEC_length (varobj_p, unchanged) - 1; i >= 0; --i) |
1749 | { | |
1750 | varobj_p tmp = VEC_index (varobj_p, unchanged, i); | |
a109c7c1 | 1751 | |
0cc7d26f TT |
1752 | if (!tmp->frozen) |
1753 | { | |
cfce2ea2 | 1754 | varobj_update_result r = {0}; |
a109c7c1 | 1755 | |
cfce2ea2 | 1756 | r.varobj = tmp; |
0cc7d26f TT |
1757 | r.value_installed = 1; |
1758 | VEC_safe_push (varobj_update_result, stack, &r); | |
1759 | } | |
1760 | } | |
b6313243 TT |
1761 | if (r.changed || r.children_changed) |
1762 | VEC_safe_push (varobj_update_result, result, &r); | |
0cc7d26f | 1763 | |
8264ba82 AG |
1764 | /* Free CHANGED, TYPE_CHANGED and UNCHANGED, but not NEW, |
1765 | because NEW has been put into the result vector. */ | |
0cc7d26f | 1766 | VEC_free (varobj_p, changed); |
8264ba82 | 1767 | VEC_free (varobj_p, type_changed); |
0cc7d26f TT |
1768 | VEC_free (varobj_p, unchanged); |
1769 | ||
b6313243 TT |
1770 | continue; |
1771 | } | |
1772 | } | |
28335dcc VP |
1773 | |
1774 | /* Push any children. Use reverse order so that the first | |
1775 | child is popped from the work stack first, and so | |
1776 | will be added to result first. This does not | |
1777 | affect correctness, just "nicer". */ | |
1778 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1779 | { |
28335dcc | 1780 | varobj_p c = VEC_index (varobj_p, v->children, i); |
a109c7c1 | 1781 | |
28335dcc | 1782 | /* Child may be NULL if explicitly deleted by -var-delete. */ |
25d5ea92 | 1783 | if (c != NULL && !c->frozen) |
28335dcc | 1784 | { |
cfce2ea2 | 1785 | varobj_update_result r = {0}; |
a109c7c1 | 1786 | |
cfce2ea2 | 1787 | r.varobj = c; |
b6313243 | 1788 | VEC_safe_push (varobj_update_result, stack, &r); |
28335dcc | 1789 | } |
8b93c638 | 1790 | } |
b6313243 TT |
1791 | |
1792 | if (r.changed || r.type_changed) | |
1793 | VEC_safe_push (varobj_update_result, result, &r); | |
8b93c638 JM |
1794 | } |
1795 | ||
b6313243 TT |
1796 | VEC_free (varobj_update_result, stack); |
1797 | ||
f7f9ae2c | 1798 | return result; |
8b93c638 JM |
1799 | } |
1800 | \f | |
1801 | ||
1802 | /* Helper functions */ | |
1803 | ||
1804 | /* | |
1805 | * Variable object construction/destruction | |
1806 | */ | |
1807 | ||
1808 | static int | |
30914ca8 | 1809 | delete_variable (struct varobj *var, int only_children_p) |
8b93c638 JM |
1810 | { |
1811 | int delcount = 0; | |
1812 | ||
30914ca8 SM |
1813 | delete_variable_1 (&delcount, var, only_children_p, |
1814 | 1 /* remove_from_parent_p */ ); | |
8b93c638 JM |
1815 | |
1816 | return delcount; | |
1817 | } | |
1818 | ||
581e13c1 | 1819 | /* Delete the variable object VAR and its children. */ |
8b93c638 JM |
1820 | /* IMPORTANT NOTE: If we delete a variable which is a child |
1821 | and the parent is not removed we dump core. It must be always | |
581e13c1 | 1822 | initially called with remove_from_parent_p set. */ |
8b93c638 | 1823 | static void |
30914ca8 | 1824 | delete_variable_1 (int *delcountp, struct varobj *var, int only_children_p, |
72330bd6 | 1825 | int remove_from_parent_p) |
8b93c638 | 1826 | { |
28335dcc | 1827 | int i; |
8b93c638 | 1828 | |
581e13c1 | 1829 | /* Delete any children of this variable, too. */ |
28335dcc VP |
1830 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1831 | { | |
1832 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
a109c7c1 | 1833 | |
214270ab VP |
1834 | if (!child) |
1835 | continue; | |
8b93c638 | 1836 | if (!remove_from_parent_p) |
28335dcc | 1837 | child->parent = NULL; |
30914ca8 | 1838 | delete_variable_1 (delcountp, child, 0, only_children_p); |
8b93c638 | 1839 | } |
28335dcc | 1840 | VEC_free (varobj_p, var->children); |
8b93c638 | 1841 | |
581e13c1 | 1842 | /* if we were called to delete only the children we are done here. */ |
8b93c638 JM |
1843 | if (only_children_p) |
1844 | return; | |
1845 | ||
581e13c1 | 1846 | /* Otherwise, add it to the list of deleted ones and proceed to do so. */ |
2f408ecb | 1847 | /* If the name is empty, this is a temporary variable, that has not |
581e13c1 | 1848 | yet been installed, don't report it, it belongs to the caller... */ |
2f408ecb | 1849 | if (!var->obj_name.empty ()) |
8b93c638 | 1850 | { |
8b93c638 JM |
1851 | *delcountp = *delcountp + 1; |
1852 | } | |
1853 | ||
581e13c1 | 1854 | /* If this variable has a parent, remove it from its parent's list. */ |
8b93c638 JM |
1855 | /* OPTIMIZATION: if the parent of this variable is also being deleted, |
1856 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1857 | expensive list search to find the element to remove when we are | |
581e13c1 | 1858 | discarding the list afterwards. */ |
72330bd6 | 1859 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1860 | { |
28335dcc | 1861 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1862 | } |
72330bd6 | 1863 | |
2f408ecb | 1864 | if (!var->obj_name.empty ()) |
73a93a32 | 1865 | uninstall_variable (var); |
8b93c638 | 1866 | |
581e13c1 | 1867 | /* Free memory associated with this variable. */ |
8b93c638 JM |
1868 | free_variable (var); |
1869 | } | |
1870 | ||
581e13c1 | 1871 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ |
8b93c638 | 1872 | static int |
fba45db2 | 1873 | install_variable (struct varobj *var) |
8b93c638 JM |
1874 | { |
1875 | struct vlist *cv; | |
1876 | struct vlist *newvl; | |
1877 | const char *chp; | |
1878 | unsigned int index = 0; | |
1879 | unsigned int i = 1; | |
1880 | ||
2f408ecb | 1881 | for (chp = var->obj_name.c_str (); *chp; chp++) |
8b93c638 JM |
1882 | { |
1883 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1884 | } | |
1885 | ||
1886 | cv = *(varobj_table + index); | |
2f408ecb | 1887 | while (cv != NULL && cv->var->obj_name != var->obj_name) |
8b93c638 JM |
1888 | cv = cv->next; |
1889 | ||
1890 | if (cv != NULL) | |
8a3fe4f8 | 1891 | error (_("Duplicate variable object name")); |
8b93c638 | 1892 | |
581e13c1 | 1893 | /* Add varobj to hash table. */ |
8d749320 | 1894 | newvl = XNEW (struct vlist); |
8b93c638 JM |
1895 | newvl->next = *(varobj_table + index); |
1896 | newvl->var = var; | |
1897 | *(varobj_table + index) = newvl; | |
1898 | ||
581e13c1 | 1899 | /* If root, add varobj to root list. */ |
b2c2bd75 | 1900 | if (is_root_p (var)) |
8b93c638 | 1901 | { |
581e13c1 | 1902 | /* Add to list of root variables. */ |
8b93c638 JM |
1903 | if (rootlist == NULL) |
1904 | var->root->next = NULL; | |
1905 | else | |
1906 | var->root->next = rootlist; | |
1907 | rootlist = var->root; | |
8b93c638 JM |
1908 | } |
1909 | ||
1910 | return 1; /* OK */ | |
1911 | } | |
1912 | ||
581e13c1 | 1913 | /* Unistall the object VAR. */ |
8b93c638 | 1914 | static void |
fba45db2 | 1915 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1916 | { |
1917 | struct vlist *cv; | |
1918 | struct vlist *prev; | |
1919 | struct varobj_root *cr; | |
1920 | struct varobj_root *prer; | |
1921 | const char *chp; | |
1922 | unsigned int index = 0; | |
1923 | unsigned int i = 1; | |
1924 | ||
581e13c1 | 1925 | /* Remove varobj from hash table. */ |
2f408ecb | 1926 | for (chp = var->obj_name.c_str (); *chp; chp++) |
8b93c638 JM |
1927 | { |
1928 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1929 | } | |
1930 | ||
1931 | cv = *(varobj_table + index); | |
1932 | prev = NULL; | |
2f408ecb | 1933 | while (cv != NULL && cv->var->obj_name != var->obj_name) |
8b93c638 JM |
1934 | { |
1935 | prev = cv; | |
1936 | cv = cv->next; | |
1937 | } | |
1938 | ||
1939 | if (varobjdebug) | |
2f408ecb | 1940 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name.c_str ()); |
8b93c638 JM |
1941 | |
1942 | if (cv == NULL) | |
1943 | { | |
72330bd6 AC |
1944 | warning |
1945 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
2f408ecb | 1946 | var->obj_name.c_str ()); |
8b93c638 JM |
1947 | return; |
1948 | } | |
1949 | ||
1950 | if (prev == NULL) | |
1951 | *(varobj_table + index) = cv->next; | |
1952 | else | |
1953 | prev->next = cv->next; | |
1954 | ||
b8c9b27d | 1955 | xfree (cv); |
8b93c638 | 1956 | |
581e13c1 | 1957 | /* If root, remove varobj from root list. */ |
b2c2bd75 | 1958 | if (is_root_p (var)) |
8b93c638 | 1959 | { |
581e13c1 | 1960 | /* Remove from list of root variables. */ |
8b93c638 JM |
1961 | if (rootlist == var->root) |
1962 | rootlist = var->root->next; | |
1963 | else | |
1964 | { | |
1965 | prer = NULL; | |
1966 | cr = rootlist; | |
1967 | while ((cr != NULL) && (cr->rootvar != var)) | |
1968 | { | |
1969 | prer = cr; | |
1970 | cr = cr->next; | |
1971 | } | |
1972 | if (cr == NULL) | |
1973 | { | |
8f7e195f JB |
1974 | warning (_("Assertion failed: Could not find " |
1975 | "varobj \"%s\" in root list"), | |
2f408ecb | 1976 | var->obj_name.c_str ()); |
8b93c638 JM |
1977 | return; |
1978 | } | |
1979 | if (prer == NULL) | |
1980 | rootlist = NULL; | |
1981 | else | |
1982 | prer->next = cr->next; | |
1983 | } | |
8b93c638 JM |
1984 | } |
1985 | ||
1986 | } | |
1987 | ||
837ce252 SM |
1988 | /* Create and install a child of the parent of the given name. |
1989 | ||
1990 | The created VAROBJ takes ownership of the allocated NAME. */ | |
1991 | ||
8b93c638 | 1992 | static struct varobj * |
2f408ecb | 1993 | create_child (struct varobj *parent, int index, std::string &name) |
b6313243 | 1994 | { |
5a2e0d6e YQ |
1995 | struct varobj_item item; |
1996 | ||
2f408ecb | 1997 | std::swap (item.name, name); |
5a2e0d6e YQ |
1998 | item.value = value_of_child (parent, index); |
1999 | ||
2000 | return create_child_with_value (parent, index, &item); | |
b6313243 TT |
2001 | } |
2002 | ||
2003 | static struct varobj * | |
5a2e0d6e YQ |
2004 | create_child_with_value (struct varobj *parent, int index, |
2005 | struct varobj_item *item) | |
8b93c638 JM |
2006 | { |
2007 | struct varobj *child; | |
8b93c638 JM |
2008 | |
2009 | child = new_variable (); | |
2010 | ||
5e5ac9a5 | 2011 | /* NAME is allocated by caller. */ |
2f408ecb | 2012 | std::swap (child->name, item->name); |
8b93c638 | 2013 | child->index = index; |
8b93c638 JM |
2014 | child->parent = parent; |
2015 | child->root = parent->root; | |
85254831 | 2016 | |
99ad9427 | 2017 | if (varobj_is_anonymous_child (child)) |
2f408ecb PA |
2018 | child->obj_name = string_printf ("%s.%d_anonymous", |
2019 | parent->obj_name.c_str (), index); | |
85254831 | 2020 | else |
2f408ecb PA |
2021 | child->obj_name = string_printf ("%s.%s", |
2022 | parent->obj_name.c_str (), | |
2023 | child->name.c_str ()); | |
85254831 | 2024 | |
8b93c638 JM |
2025 | install_variable (child); |
2026 | ||
acd65feb VP |
2027 | /* Compute the type of the child. Must do this before |
2028 | calling install_new_value. */ | |
5a2e0d6e | 2029 | if (item->value != NULL) |
acd65feb | 2030 | /* If the child had no evaluation errors, var->value |
581e13c1 | 2031 | will be non-NULL and contain a valid type. */ |
5a2e0d6e | 2032 | child->type = value_actual_type (item->value, 0, NULL); |
acd65feb | 2033 | else |
581e13c1 | 2034 | /* Otherwise, we must compute the type. */ |
ca20d462 YQ |
2035 | child->type = (*child->root->lang_ops->type_of_child) (child->parent, |
2036 | child->index); | |
5a2e0d6e | 2037 | install_new_value (child, item->value, 1); |
acd65feb | 2038 | |
8b93c638 JM |
2039 | return child; |
2040 | } | |
8b93c638 JM |
2041 | \f |
2042 | ||
2043 | /* | |
2044 | * Miscellaneous utility functions. | |
2045 | */ | |
2046 | ||
581e13c1 | 2047 | /* Allocate memory and initialize a new variable. */ |
8b93c638 JM |
2048 | static struct varobj * |
2049 | new_variable (void) | |
2050 | { | |
2051 | struct varobj *var; | |
2052 | ||
2f408ecb | 2053 | var = new varobj (); |
8b93c638 JM |
2054 | var->index = -1; |
2055 | var->type = NULL; | |
2056 | var->value = NULL; | |
8b93c638 JM |
2057 | var->num_children = -1; |
2058 | var->parent = NULL; | |
2059 | var->children = NULL; | |
f486487f | 2060 | var->format = FORMAT_NATURAL; |
8b93c638 | 2061 | var->root = NULL; |
fb9b6b35 | 2062 | var->updated = 0; |
25d5ea92 VP |
2063 | var->frozen = 0; |
2064 | var->not_fetched = 0; | |
8d749320 | 2065 | var->dynamic = XNEW (struct varobj_dynamic); |
bb5ce47a | 2066 | var->dynamic->children_requested = 0; |
0cc7d26f TT |
2067 | var->from = -1; |
2068 | var->to = -1; | |
bb5ce47a YQ |
2069 | var->dynamic->constructor = 0; |
2070 | var->dynamic->pretty_printer = 0; | |
2071 | var->dynamic->child_iter = 0; | |
2072 | var->dynamic->saved_item = 0; | |
8b93c638 JM |
2073 | |
2074 | return var; | |
2075 | } | |
2076 | ||
581e13c1 | 2077 | /* Allocate memory and initialize a new root variable. */ |
8b93c638 JM |
2078 | static struct varobj * |
2079 | new_root_variable (void) | |
2080 | { | |
2081 | struct varobj *var = new_variable (); | |
a109c7c1 | 2082 | |
4d01a485 | 2083 | var->root = new varobj_root (); |
ca20d462 | 2084 | var->root->lang_ops = NULL; |
8b93c638 JM |
2085 | var->root->exp = NULL; |
2086 | var->root->valid_block = NULL; | |
7a424e99 | 2087 | var->root->frame = null_frame_id; |
a5defcdc | 2088 | var->root->floating = 0; |
8b93c638 | 2089 | var->root->rootvar = NULL; |
8756216b | 2090 | var->root->is_valid = 1; |
8b93c638 JM |
2091 | |
2092 | return var; | |
2093 | } | |
2094 | ||
581e13c1 | 2095 | /* Free any allocated memory associated with VAR. */ |
8b93c638 | 2096 | static void |
fba45db2 | 2097 | free_variable (struct varobj *var) |
8b93c638 | 2098 | { |
d452c4bc | 2099 | #if HAVE_PYTHON |
bb5ce47a | 2100 | if (var->dynamic->pretty_printer != NULL) |
d452c4bc UW |
2101 | { |
2102 | struct cleanup *cleanup = varobj_ensure_python_env (var); | |
bb5ce47a YQ |
2103 | |
2104 | Py_XDECREF (var->dynamic->constructor); | |
2105 | Py_XDECREF (var->dynamic->pretty_printer); | |
d452c4bc UW |
2106 | do_cleanups (cleanup); |
2107 | } | |
2108 | #endif | |
2109 | ||
827f100c YQ |
2110 | varobj_iter_delete (var->dynamic->child_iter); |
2111 | varobj_clear_saved_item (var->dynamic); | |
36746093 JK |
2112 | value_free (var->value); |
2113 | ||
b2c2bd75 | 2114 | if (is_root_p (var)) |
4d01a485 | 2115 | delete var->root; |
8b93c638 | 2116 | |
bb5ce47a | 2117 | xfree (var->dynamic); |
2f408ecb | 2118 | delete var; |
8b93c638 JM |
2119 | } |
2120 | ||
74b7792f AC |
2121 | static void |
2122 | do_free_variable_cleanup (void *var) | |
2123 | { | |
19ba03f4 | 2124 | free_variable ((struct varobj *) var); |
74b7792f AC |
2125 | } |
2126 | ||
2127 | static struct cleanup * | |
2128 | make_cleanup_free_variable (struct varobj *var) | |
2129 | { | |
2130 | return make_cleanup (do_free_variable_cleanup, var); | |
2131 | } | |
2132 | ||
6e2a9270 VP |
2133 | /* Return the type of the value that's stored in VAR, |
2134 | or that would have being stored there if the | |
581e13c1 | 2135 | value were accessible. |
6e2a9270 VP |
2136 | |
2137 | This differs from VAR->type in that VAR->type is always | |
2138 | the true type of the expession in the source language. | |
2139 | The return value of this function is the type we're | |
2140 | actually storing in varobj, and using for displaying | |
2141 | the values and for comparing previous and new values. | |
2142 | ||
2143 | For example, top-level references are always stripped. */ | |
99ad9427 | 2144 | struct type * |
b09e2c59 | 2145 | varobj_get_value_type (const struct varobj *var) |
6e2a9270 VP |
2146 | { |
2147 | struct type *type; | |
2148 | ||
2149 | if (var->value) | |
2150 | type = value_type (var->value); | |
2151 | else | |
2152 | type = var->type; | |
2153 | ||
2154 | type = check_typedef (type); | |
2155 | ||
2156 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
2157 | type = get_target_type (type); | |
2158 | ||
2159 | type = check_typedef (type); | |
2160 | ||
2161 | return type; | |
2162 | } | |
2163 | ||
8b93c638 | 2164 | /* What is the default display for this variable? We assume that |
581e13c1 | 2165 | everything is "natural". Any exceptions? */ |
8b93c638 | 2166 | static enum varobj_display_formats |
fba45db2 | 2167 | variable_default_display (struct varobj *var) |
8b93c638 JM |
2168 | { |
2169 | return FORMAT_NATURAL; | |
2170 | } | |
2171 | ||
8b93c638 JM |
2172 | /* |
2173 | * Language-dependencies | |
2174 | */ | |
2175 | ||
2176 | /* Common entry points */ | |
2177 | ||
8b93c638 JM |
2178 | /* Return the number of children for a given variable. |
2179 | The result of this function is defined by the language | |
581e13c1 | 2180 | implementation. The number of children returned by this function |
8b93c638 | 2181 | is the number of children that the user will see in the variable |
581e13c1 | 2182 | display. */ |
8b93c638 | 2183 | static int |
b09e2c59 | 2184 | number_of_children (const struct varobj *var) |
8b93c638 | 2185 | { |
ca20d462 | 2186 | return (*var->root->lang_ops->number_of_children) (var); |
8b93c638 JM |
2187 | } |
2188 | ||
2f408ecb PA |
2189 | /* What is the expression for the root varobj VAR? */ |
2190 | ||
2191 | static std::string | |
b09e2c59 | 2192 | name_of_variable (const struct varobj *var) |
8b93c638 | 2193 | { |
ca20d462 | 2194 | return (*var->root->lang_ops->name_of_variable) (var); |
8b93c638 JM |
2195 | } |
2196 | ||
2f408ecb PA |
2197 | /* What is the name of the INDEX'th child of VAR? */ |
2198 | ||
2199 | static std::string | |
fba45db2 | 2200 | name_of_child (struct varobj *var, int index) |
8b93c638 | 2201 | { |
ca20d462 | 2202 | return (*var->root->lang_ops->name_of_child) (var, index); |
8b93c638 JM |
2203 | } |
2204 | ||
2213e2be YQ |
2205 | /* If frame associated with VAR can be found, switch |
2206 | to it and return 1. Otherwise, return 0. */ | |
2207 | ||
2208 | static int | |
b09e2c59 | 2209 | check_scope (const struct varobj *var) |
2213e2be YQ |
2210 | { |
2211 | struct frame_info *fi; | |
2212 | int scope; | |
2213 | ||
2214 | fi = frame_find_by_id (var->root->frame); | |
2215 | scope = fi != NULL; | |
2216 | ||
2217 | if (fi) | |
2218 | { | |
2219 | CORE_ADDR pc = get_frame_pc (fi); | |
2220 | ||
2221 | if (pc < BLOCK_START (var->root->valid_block) || | |
2222 | pc >= BLOCK_END (var->root->valid_block)) | |
2223 | scope = 0; | |
2224 | else | |
2225 | select_frame (fi); | |
2226 | } | |
2227 | return scope; | |
2228 | } | |
2229 | ||
2230 | /* Helper function to value_of_root. */ | |
2231 | ||
2232 | static struct value * | |
2233 | value_of_root_1 (struct varobj **var_handle) | |
2234 | { | |
2235 | struct value *new_val = NULL; | |
2236 | struct varobj *var = *var_handle; | |
2237 | int within_scope = 0; | |
2238 | struct cleanup *back_to; | |
2239 | ||
2240 | /* Only root variables can be updated... */ | |
2241 | if (!is_root_p (var)) | |
2242 | /* Not a root var. */ | |
2243 | return NULL; | |
2244 | ||
2245 | back_to = make_cleanup_restore_current_thread (); | |
2246 | ||
2247 | /* Determine whether the variable is still around. */ | |
2248 | if (var->root->valid_block == NULL || var->root->floating) | |
2249 | within_scope = 1; | |
2250 | else if (var->root->thread_id == 0) | |
2251 | { | |
2252 | /* The program was single-threaded when the variable object was | |
2253 | created. Technically, it's possible that the program became | |
2254 | multi-threaded since then, but we don't support such | |
2255 | scenario yet. */ | |
2256 | within_scope = check_scope (var); | |
2257 | } | |
2258 | else | |
2259 | { | |
5d5658a1 PA |
2260 | ptid_t ptid = global_thread_id_to_ptid (var->root->thread_id); |
2261 | ||
2262 | if (!ptid_equal (minus_one_ptid, ptid)) | |
2213e2be YQ |
2263 | { |
2264 | switch_to_thread (ptid); | |
2265 | within_scope = check_scope (var); | |
2266 | } | |
2267 | } | |
2268 | ||
2269 | if (within_scope) | |
2270 | { | |
2213e2be YQ |
2271 | |
2272 | /* We need to catch errors here, because if evaluate | |
2273 | expression fails we want to just return NULL. */ | |
492d29ea | 2274 | TRY |
2213e2be | 2275 | { |
4d01a485 | 2276 | new_val = evaluate_expression (var->root->exp.get ()); |
2213e2be | 2277 | } |
492d29ea PA |
2278 | CATCH (except, RETURN_MASK_ERROR) |
2279 | { | |
2280 | } | |
2281 | END_CATCH | |
2213e2be YQ |
2282 | } |
2283 | ||
2284 | do_cleanups (back_to); | |
2285 | ||
2286 | return new_val; | |
2287 | } | |
2288 | ||
a5defcdc VP |
2289 | /* What is the ``struct value *'' of the root variable VAR? |
2290 | For floating variable object, evaluation can get us a value | |
2291 | of different type from what is stored in varobj already. In | |
2292 | that case: | |
2293 | - *type_changed will be set to 1 | |
2294 | - old varobj will be freed, and new one will be | |
2295 | created, with the same name. | |
2296 | - *var_handle will be set to the new varobj | |
2297 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 2298 | static struct value * |
fba45db2 | 2299 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 2300 | { |
73a93a32 JI |
2301 | struct varobj *var; |
2302 | ||
2303 | if (var_handle == NULL) | |
2304 | return NULL; | |
2305 | ||
2306 | var = *var_handle; | |
2307 | ||
2308 | /* This should really be an exception, since this should | |
581e13c1 | 2309 | only get called with a root variable. */ |
73a93a32 | 2310 | |
b2c2bd75 | 2311 | if (!is_root_p (var)) |
73a93a32 JI |
2312 | return NULL; |
2313 | ||
a5defcdc | 2314 | if (var->root->floating) |
73a93a32 JI |
2315 | { |
2316 | struct varobj *tmp_var; | |
6225abfa | 2317 | |
2f408ecb | 2318 | tmp_var = varobj_create (NULL, var->name.c_str (), (CORE_ADDR) 0, |
73a93a32 JI |
2319 | USE_SELECTED_FRAME); |
2320 | if (tmp_var == NULL) | |
2321 | { | |
2322 | return NULL; | |
2323 | } | |
2f408ecb PA |
2324 | std::string old_type = varobj_get_type (var); |
2325 | std::string new_type = varobj_get_type (tmp_var); | |
2326 | if (old_type == new_type) | |
73a93a32 | 2327 | { |
fcacd99f VP |
2328 | /* The expression presently stored inside var->root->exp |
2329 | remembers the locations of local variables relatively to | |
2330 | the frame where the expression was created (in DWARF location | |
2331 | button, for example). Naturally, those locations are not | |
2332 | correct in other frames, so update the expression. */ | |
2333 | ||
4d01a485 | 2334 | std::swap (var->root->exp, tmp_var->root->exp); |
fcacd99f | 2335 | |
30914ca8 | 2336 | varobj_delete (tmp_var, 0); |
73a93a32 JI |
2337 | *type_changed = 0; |
2338 | } | |
2339 | else | |
2340 | { | |
2f408ecb | 2341 | tmp_var->obj_name = var->obj_name; |
0cc7d26f TT |
2342 | tmp_var->from = var->from; |
2343 | tmp_var->to = var->to; | |
30914ca8 | 2344 | varobj_delete (var, 0); |
a5defcdc | 2345 | |
73a93a32 JI |
2346 | install_variable (tmp_var); |
2347 | *var_handle = tmp_var; | |
705da579 | 2348 | var = *var_handle; |
73a93a32 JI |
2349 | *type_changed = 1; |
2350 | } | |
2351 | } | |
2352 | else | |
2353 | { | |
2354 | *type_changed = 0; | |
2355 | } | |
2356 | ||
7a290c40 JB |
2357 | { |
2358 | struct value *value; | |
2359 | ||
2213e2be | 2360 | value = value_of_root_1 (var_handle); |
7a290c40 JB |
2361 | if (var->value == NULL || value == NULL) |
2362 | { | |
2363 | /* For root varobj-s, a NULL value indicates a scoping issue. | |
2364 | So, nothing to do in terms of checking for mutations. */ | |
2365 | } | |
2366 | else if (varobj_value_has_mutated (var, value, value_type (value))) | |
2367 | { | |
2368 | /* The type has mutated, so the children are no longer valid. | |
2369 | Just delete them, and tell our caller that the type has | |
2370 | changed. */ | |
30914ca8 | 2371 | varobj_delete (var, 1 /* only_children */); |
7a290c40 JB |
2372 | var->num_children = -1; |
2373 | var->to = -1; | |
2374 | var->from = -1; | |
2375 | *type_changed = 1; | |
2376 | } | |
2377 | return value; | |
2378 | } | |
8b93c638 JM |
2379 | } |
2380 | ||
581e13c1 | 2381 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
30b28db1 | 2382 | static struct value * |
c1cc6152 | 2383 | value_of_child (const struct varobj *parent, int index) |
8b93c638 | 2384 | { |
30b28db1 | 2385 | struct value *value; |
8b93c638 | 2386 | |
ca20d462 | 2387 | value = (*parent->root->lang_ops->value_of_child) (parent, index); |
8b93c638 | 2388 | |
8b93c638 JM |
2389 | return value; |
2390 | } | |
2391 | ||
581e13c1 | 2392 | /* GDB already has a command called "value_of_variable". Sigh. */ |
2f408ecb | 2393 | static std::string |
de051565 | 2394 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2395 | { |
8756216b | 2396 | if (var->root->is_valid) |
0cc7d26f | 2397 | { |
bb5ce47a | 2398 | if (var->dynamic->pretty_printer != NULL) |
99ad9427 | 2399 | return varobj_value_get_print_value (var->value, var->format, var); |
ca20d462 | 2400 | return (*var->root->lang_ops->value_of_variable) (var, format); |
0cc7d26f | 2401 | } |
8756216b | 2402 | else |
2f408ecb | 2403 | return std::string (); |
8b93c638 JM |
2404 | } |
2405 | ||
99ad9427 YQ |
2406 | void |
2407 | varobj_formatted_print_options (struct value_print_options *opts, | |
2408 | enum varobj_display_formats format) | |
2409 | { | |
2410 | get_formatted_print_options (opts, format_code[(int) format]); | |
2411 | opts->deref_ref = 0; | |
2412 | opts->raw = 1; | |
2413 | } | |
2414 | ||
2f408ecb | 2415 | std::string |
99ad9427 YQ |
2416 | varobj_value_get_print_value (struct value *value, |
2417 | enum varobj_display_formats format, | |
b09e2c59 | 2418 | const struct varobj *var) |
85265413 | 2419 | { |
57e66780 | 2420 | struct ui_file *stb; |
621c8364 | 2421 | struct cleanup *old_chain; |
79a45b7d | 2422 | struct value_print_options opts; |
be759fcf PM |
2423 | struct type *type = NULL; |
2424 | long len = 0; | |
2425 | char *encoding = NULL; | |
3a182a69 JK |
2426 | /* Initialize it just to avoid a GCC false warning. */ |
2427 | CORE_ADDR str_addr = 0; | |
09ca9e2e | 2428 | int string_print = 0; |
57e66780 DJ |
2429 | |
2430 | if (value == NULL) | |
2f408ecb | 2431 | return std::string (); |
57e66780 | 2432 | |
621c8364 TT |
2433 | stb = mem_fileopen (); |
2434 | old_chain = make_cleanup_ui_file_delete (stb); | |
2435 | ||
2f408ecb PA |
2436 | std::string thevalue; |
2437 | ||
b6313243 | 2438 | #if HAVE_PYTHON |
0646da15 TT |
2439 | if (gdb_python_initialized) |
2440 | { | |
bb5ce47a | 2441 | PyObject *value_formatter = var->dynamic->pretty_printer; |
d452c4bc | 2442 | |
0646da15 | 2443 | varobj_ensure_python_env (var); |
09ca9e2e | 2444 | |
0646da15 TT |
2445 | if (value_formatter) |
2446 | { | |
2447 | /* First check to see if we have any children at all. If so, | |
2448 | we simply return {...}. */ | |
2449 | if (dynamic_varobj_has_child_method (var)) | |
2450 | { | |
2451 | do_cleanups (old_chain); | |
2452 | return xstrdup ("{...}"); | |
2453 | } | |
b6313243 | 2454 | |
0646da15 TT |
2455 | if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst)) |
2456 | { | |
2457 | struct value *replacement; | |
2458 | PyObject *output = NULL; | |
2459 | ||
2460 | output = apply_varobj_pretty_printer (value_formatter, | |
2461 | &replacement, | |
2462 | stb); | |
2463 | ||
2464 | /* If we have string like output ... */ | |
2465 | if (output) | |
2466 | { | |
2467 | make_cleanup_py_decref (output); | |
2468 | ||
2469 | /* If this is a lazy string, extract it. For lazy | |
2470 | strings we always print as a string, so set | |
2471 | string_print. */ | |
2472 | if (gdbpy_is_lazy_string (output)) | |
2473 | { | |
2474 | gdbpy_extract_lazy_string (output, &str_addr, &type, | |
2475 | &len, &encoding); | |
2476 | make_cleanup (free_current_contents, &encoding); | |
2477 | string_print = 1; | |
2478 | } | |
2479 | else | |
2480 | { | |
2481 | /* If it is a regular (non-lazy) string, extract | |
2482 | it and copy the contents into THEVALUE. If the | |
2483 | hint says to print it as a string, set | |
2484 | string_print. Otherwise just return the extracted | |
2485 | string as a value. */ | |
2486 | ||
9b972014 TT |
2487 | gdb::unique_xmalloc_ptr<char> s |
2488 | = python_string_to_target_string (output); | |
0646da15 TT |
2489 | |
2490 | if (s) | |
2491 | { | |
e3821cca | 2492 | struct gdbarch *gdbarch; |
0646da15 | 2493 | |
9b972014 TT |
2494 | gdb::unique_xmalloc_ptr<char> hint |
2495 | = gdbpy_get_display_hint (value_formatter); | |
0646da15 TT |
2496 | if (hint) |
2497 | { | |
9b972014 | 2498 | if (!strcmp (hint.get (), "string")) |
0646da15 | 2499 | string_print = 1; |
0646da15 TT |
2500 | } |
2501 | ||
9b972014 | 2502 | thevalue = std::string (s.get ()); |
2f408ecb | 2503 | len = thevalue.size (); |
e3821cca | 2504 | gdbarch = get_type_arch (value_type (value)); |
0646da15 | 2505 | type = builtin_type (gdbarch)->builtin_char; |
0646da15 TT |
2506 | |
2507 | if (!string_print) | |
2508 | { | |
2509 | do_cleanups (old_chain); | |
2510 | return thevalue; | |
2511 | } | |
0646da15 TT |
2512 | } |
2513 | else | |
2514 | gdbpy_print_stack (); | |
2515 | } | |
2516 | } | |
2517 | /* If the printer returned a replacement value, set VALUE | |
2518 | to REPLACEMENT. If there is not a replacement value, | |
2519 | just use the value passed to this function. */ | |
2520 | if (replacement) | |
2521 | value = replacement; | |
2522 | } | |
2523 | } | |
2524 | } | |
b6313243 TT |
2525 | #endif |
2526 | ||
99ad9427 | 2527 | varobj_formatted_print_options (&opts, format); |
00bd41d6 PM |
2528 | |
2529 | /* If the THEVALUE has contents, it is a regular string. */ | |
2f408ecb PA |
2530 | if (!thevalue.empty ()) |
2531 | LA_PRINT_STRING (stb, type, (gdb_byte *) thevalue.c_str (), | |
2532 | len, encoding, 0, &opts); | |
09ca9e2e | 2533 | else if (string_print) |
00bd41d6 PM |
2534 | /* Otherwise, if string_print is set, and it is not a regular |
2535 | string, it is a lazy string. */ | |
09ca9e2e | 2536 | val_print_string (type, encoding, str_addr, len, stb, &opts); |
b6313243 | 2537 | else |
00bd41d6 | 2538 | /* All other cases. */ |
b6313243 | 2539 | common_val_print (value, stb, 0, &opts, current_language); |
00bd41d6 | 2540 | |
2f408ecb | 2541 | thevalue = ui_file_as_string (stb); |
57e66780 | 2542 | |
85265413 NR |
2543 | do_cleanups (old_chain); |
2544 | return thevalue; | |
2545 | } | |
2546 | ||
340a7723 | 2547 | int |
b09e2c59 | 2548 | varobj_editable_p (const struct varobj *var) |
340a7723 NR |
2549 | { |
2550 | struct type *type; | |
340a7723 NR |
2551 | |
2552 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
2553 | return 0; | |
2554 | ||
99ad9427 | 2555 | type = varobj_get_value_type (var); |
340a7723 NR |
2556 | |
2557 | switch (TYPE_CODE (type)) | |
2558 | { | |
2559 | case TYPE_CODE_STRUCT: | |
2560 | case TYPE_CODE_UNION: | |
2561 | case TYPE_CODE_ARRAY: | |
2562 | case TYPE_CODE_FUNC: | |
2563 | case TYPE_CODE_METHOD: | |
2564 | return 0; | |
2565 | break; | |
2566 | ||
2567 | default: | |
2568 | return 1; | |
2569 | break; | |
2570 | } | |
2571 | } | |
2572 | ||
d32cafc7 | 2573 | /* Call VAR's value_is_changeable_p language-specific callback. */ |
acd65feb | 2574 | |
99ad9427 | 2575 | int |
b09e2c59 | 2576 | varobj_value_is_changeable_p (const struct varobj *var) |
8b93c638 | 2577 | { |
ca20d462 | 2578 | return var->root->lang_ops->value_is_changeable_p (var); |
8b93c638 JM |
2579 | } |
2580 | ||
5a413362 VP |
2581 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
2582 | selected frame, and not bound to thread/frame. Such variable objects | |
2583 | are created using '@' as frame specifier to -var-create. */ | |
2584 | int | |
b09e2c59 | 2585 | varobj_floating_p (const struct varobj *var) |
5a413362 VP |
2586 | { |
2587 | return var->root->floating; | |
2588 | } | |
2589 | ||
d32cafc7 JB |
2590 | /* Implement the "value_is_changeable_p" varobj callback for most |
2591 | languages. */ | |
2592 | ||
99ad9427 | 2593 | int |
b09e2c59 | 2594 | varobj_default_value_is_changeable_p (const struct varobj *var) |
d32cafc7 JB |
2595 | { |
2596 | int r; | |
2597 | struct type *type; | |
2598 | ||
2599 | if (CPLUS_FAKE_CHILD (var)) | |
2600 | return 0; | |
2601 | ||
99ad9427 | 2602 | type = varobj_get_value_type (var); |
d32cafc7 JB |
2603 | |
2604 | switch (TYPE_CODE (type)) | |
2605 | { | |
2606 | case TYPE_CODE_STRUCT: | |
2607 | case TYPE_CODE_UNION: | |
2608 | case TYPE_CODE_ARRAY: | |
2609 | r = 0; | |
2610 | break; | |
2611 | ||
2612 | default: | |
2613 | r = 1; | |
2614 | } | |
2615 | ||
2616 | return r; | |
2617 | } | |
2618 | ||
54333c3b JK |
2619 | /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them |
2620 | with an arbitrary caller supplied DATA pointer. */ | |
2621 | ||
2622 | void | |
2623 | all_root_varobjs (void (*func) (struct varobj *var, void *data), void *data) | |
2624 | { | |
2625 | struct varobj_root *var_root, *var_root_next; | |
2626 | ||
2627 | /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */ | |
2628 | ||
2629 | for (var_root = rootlist; var_root != NULL; var_root = var_root_next) | |
2630 | { | |
2631 | var_root_next = var_root->next; | |
2632 | ||
2633 | (*func) (var_root->rootvar, data); | |
2634 | } | |
2635 | } | |
8756216b | 2636 | |
54333c3b | 2637 | /* Invalidate varobj VAR if it is tied to locals and re-create it if it is |
4e969b4f AB |
2638 | defined on globals. It is a helper for varobj_invalidate. |
2639 | ||
2640 | This function is called after changing the symbol file, in this case the | |
2641 | pointers to "struct type" stored by the varobj are no longer valid. All | |
2642 | varobj must be either re-evaluated, or marked as invalid here. */ | |
2dbd25e5 | 2643 | |
54333c3b JK |
2644 | static void |
2645 | varobj_invalidate_iter (struct varobj *var, void *unused) | |
8756216b | 2646 | { |
4e969b4f AB |
2647 | /* global and floating var must be re-evaluated. */ |
2648 | if (var->root->floating || var->root->valid_block == NULL) | |
2dbd25e5 | 2649 | { |
54333c3b | 2650 | struct varobj *tmp_var; |
2dbd25e5 | 2651 | |
54333c3b JK |
2652 | /* Try to create a varobj with same expression. If we succeed |
2653 | replace the old varobj, otherwise invalidate it. */ | |
2f408ecb | 2654 | tmp_var = varobj_create (NULL, var->name.c_str (), (CORE_ADDR) 0, |
54333c3b JK |
2655 | USE_CURRENT_FRAME); |
2656 | if (tmp_var != NULL) | |
2657 | { | |
2f408ecb | 2658 | tmp_var->obj_name = var->obj_name; |
30914ca8 | 2659 | varobj_delete (var, 0); |
54333c3b | 2660 | install_variable (tmp_var); |
2dbd25e5 | 2661 | } |
54333c3b JK |
2662 | else |
2663 | var->root->is_valid = 0; | |
2dbd25e5 | 2664 | } |
54333c3b JK |
2665 | else /* locals must be invalidated. */ |
2666 | var->root->is_valid = 0; | |
2667 | } | |
2668 | ||
2669 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2670 | are defined on globals. | |
2671 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2672 | ||
2673 | void | |
2674 | varobj_invalidate (void) | |
2675 | { | |
2676 | all_root_varobjs (varobj_invalidate_iter, NULL); | |
8756216b | 2677 | } |
1c3569d4 MR |
2678 | \f |
2679 | extern void _initialize_varobj (void); | |
2680 | void | |
2681 | _initialize_varobj (void) | |
2682 | { | |
8d749320 | 2683 | varobj_table = XCNEWVEC (struct vlist *, VAROBJ_TABLE_SIZE); |
1c3569d4 MR |
2684 | |
2685 | add_setshow_zuinteger_cmd ("varobj", class_maintenance, | |
2686 | &varobjdebug, | |
2687 | _("Set varobj debugging."), | |
2688 | _("Show varobj debugging."), | |
2689 | _("When non-zero, varobj debugging is enabled."), | |
2690 | NULL, show_varobjdebug, | |
2691 | &setdebuglist, &showdebuglist); | |
2692 | } |