Commit | Line | Data |
---|---|---|
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 | |
581e13c1 | 67 | varobj. Members which must be free'd are noted. */ |
8b93c638 | 68 | struct varobj_root |
72330bd6 | 69 | { |
8b93c638 | 70 | |
581e13c1 | 71 | /* Alloc'd expression for this parent. */ |
72330bd6 | 72 | struct expression *exp; |
8b93c638 | 73 | |
581e13c1 | 74 | /* Block for which this expression is valid. */ |
270140bd | 75 | const struct block *valid_block; |
8b93c638 | 76 | |
44a67aa7 VP |
77 | /* The frame for this expression. This field is set iff valid_block is |
78 | not NULL. */ | |
e64d9b3d | 79 | struct frame_id frame; |
8b93c638 | 80 | |
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 | |
a14ed312 | 159 | static struct varobj *create_child (struct varobj *, int, char *); |
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 | |
b09e2c59 | 187 | static char *name_of_variable (const struct varobj *); |
8b93c638 | 188 | |
a14ed312 | 189 | static char *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 | |
de051565 MK |
195 | static char *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 JM |
272 | struct varobj * |
273 | varobj_create (char *objname, | |
72330bd6 | 274 | 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; | |
1b36a34b | 354 | var->name = xstrdup (expression); |
02142340 | 355 | /* For a root var, the name and the expr are the same. */ |
1b36a34b | 356 | var->path_expr = xstrdup (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 KS |
381 | { |
382 | value = evaluate_expression (var->root->exp); | |
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. */ | |
388 | struct value *type_only_value = evaluate_type (var->root->exp); | |
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 | { |
1b36a34b | 421 | var->obj_name = xstrdup (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 * | |
455 | varobj_get_handle (char *objname) | |
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); | |
468 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
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 JM |
478 | |
479 | char * | |
b09e2c59 | 480 | varobj_get_objname (const struct varobj *var) |
8b93c638 JM |
481 | { |
482 | return var->obj_name; | |
483 | } | |
484 | ||
ca83fa81 SM |
485 | /* Given the handle, return the expression represented by the object. The |
486 | result must be freed by the caller. */ | |
8b93c638 JM |
487 | |
488 | char * | |
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 | { | |
6c761d9c | 547 | xfree (var->print_value); |
99ad9427 YQ |
548 | var->print_value = varobj_value_get_print_value (var->value, |
549 | var->format, var); | |
ae7d22a6 VP |
550 | } |
551 | ||
8b93c638 JM |
552 | return var->format; |
553 | } | |
554 | ||
555 | enum varobj_display_formats | |
b09e2c59 | 556 | varobj_get_display_format (const struct varobj *var) |
8b93c638 JM |
557 | { |
558 | return var->format; | |
559 | } | |
560 | ||
b6313243 | 561 | char * |
b09e2c59 | 562 | varobj_get_display_hint (const struct varobj *var) |
b6313243 TT |
563 | { |
564 | char *result = NULL; | |
565 | ||
566 | #if HAVE_PYTHON | |
0646da15 TT |
567 | struct cleanup *back_to; |
568 | ||
569 | if (!gdb_python_initialized) | |
570 | return NULL; | |
571 | ||
572 | back_to = varobj_ensure_python_env (var); | |
d452c4bc | 573 | |
bb5ce47a YQ |
574 | if (var->dynamic->pretty_printer != NULL) |
575 | result = gdbpy_get_display_hint (var->dynamic->pretty_printer); | |
d452c4bc UW |
576 | |
577 | do_cleanups (back_to); | |
b6313243 TT |
578 | #endif |
579 | ||
580 | return result; | |
581 | } | |
582 | ||
0cc7d26f TT |
583 | /* Return true if the varobj has items after TO, false otherwise. */ |
584 | ||
585 | int | |
b09e2c59 | 586 | varobj_has_more (const struct varobj *var, int to) |
0cc7d26f TT |
587 | { |
588 | if (VEC_length (varobj_p, var->children) > to) | |
589 | return 1; | |
590 | return ((to == -1 || VEC_length (varobj_p, var->children) == to) | |
bb5ce47a | 591 | && (var->dynamic->saved_item != NULL)); |
0cc7d26f TT |
592 | } |
593 | ||
c5b48eac VP |
594 | /* If the variable object is bound to a specific thread, that |
595 | is its evaluation can always be done in context of a frame | |
596 | inside that thread, returns GDB id of the thread -- which | |
581e13c1 | 597 | is always positive. Otherwise, returns -1. */ |
c5b48eac | 598 | int |
b09e2c59 | 599 | varobj_get_thread_id (const struct varobj *var) |
c5b48eac VP |
600 | { |
601 | if (var->root->valid_block && var->root->thread_id > 0) | |
602 | return var->root->thread_id; | |
603 | else | |
604 | return -1; | |
605 | } | |
606 | ||
25d5ea92 VP |
607 | void |
608 | varobj_set_frozen (struct varobj *var, int frozen) | |
609 | { | |
610 | /* When a variable is unfrozen, we don't fetch its value. | |
611 | The 'not_fetched' flag remains set, so next -var-update | |
612 | won't complain. | |
613 | ||
614 | We don't fetch the value, because for structures the client | |
615 | should do -var-update anyway. It would be bad to have different | |
616 | client-size logic for structure and other types. */ | |
617 | var->frozen = frozen; | |
618 | } | |
619 | ||
620 | int | |
b09e2c59 | 621 | varobj_get_frozen (const struct varobj *var) |
25d5ea92 VP |
622 | { |
623 | return var->frozen; | |
624 | } | |
625 | ||
0cc7d26f TT |
626 | /* A helper function that restricts a range to what is actually |
627 | available in a VEC. This follows the usual rules for the meaning | |
628 | of FROM and TO -- if either is negative, the entire range is | |
629 | used. */ | |
630 | ||
99ad9427 YQ |
631 | void |
632 | varobj_restrict_range (VEC (varobj_p) *children, int *from, int *to) | |
0cc7d26f TT |
633 | { |
634 | if (*from < 0 || *to < 0) | |
635 | { | |
636 | *from = 0; | |
637 | *to = VEC_length (varobj_p, children); | |
638 | } | |
639 | else | |
640 | { | |
641 | if (*from > VEC_length (varobj_p, children)) | |
642 | *from = VEC_length (varobj_p, children); | |
643 | if (*to > VEC_length (varobj_p, children)) | |
644 | *to = VEC_length (varobj_p, children); | |
645 | if (*from > *to) | |
646 | *from = *to; | |
647 | } | |
648 | } | |
649 | ||
650 | /* A helper for update_dynamic_varobj_children that installs a new | |
651 | child when needed. */ | |
652 | ||
653 | static void | |
654 | install_dynamic_child (struct varobj *var, | |
655 | VEC (varobj_p) **changed, | |
8264ba82 | 656 | VEC (varobj_p) **type_changed, |
fe978cb0 | 657 | VEC (varobj_p) **newobj, |
0cc7d26f TT |
658 | VEC (varobj_p) **unchanged, |
659 | int *cchanged, | |
660 | int index, | |
5a2e0d6e | 661 | struct varobj_item *item) |
0cc7d26f TT |
662 | { |
663 | if (VEC_length (varobj_p, var->children) < index + 1) | |
664 | { | |
665 | /* There's no child yet. */ | |
5a2e0d6e | 666 | struct varobj *child = varobj_add_child (var, item); |
a109c7c1 | 667 | |
fe978cb0 | 668 | if (newobj) |
0cc7d26f | 669 | { |
fe978cb0 | 670 | VEC_safe_push (varobj_p, *newobj, child); |
0cc7d26f TT |
671 | *cchanged = 1; |
672 | } | |
673 | } | |
bf8793bb | 674 | else |
0cc7d26f TT |
675 | { |
676 | varobj_p existing = VEC_index (varobj_p, var->children, index); | |
5a2e0d6e | 677 | int type_updated = update_type_if_necessary (existing, item->value); |
bf8793bb | 678 | |
8264ba82 AG |
679 | if (type_updated) |
680 | { | |
681 | if (type_changed) | |
682 | VEC_safe_push (varobj_p, *type_changed, existing); | |
683 | } | |
5a2e0d6e | 684 | if (install_new_value (existing, item->value, 0)) |
0cc7d26f | 685 | { |
8264ba82 | 686 | if (!type_updated && changed) |
0cc7d26f TT |
687 | VEC_safe_push (varobj_p, *changed, existing); |
688 | } | |
8264ba82 | 689 | else if (!type_updated && unchanged) |
0cc7d26f TT |
690 | VEC_safe_push (varobj_p, *unchanged, existing); |
691 | } | |
692 | } | |
693 | ||
576ea091 YQ |
694 | #if HAVE_PYTHON |
695 | ||
0cc7d26f | 696 | static int |
b09e2c59 | 697 | dynamic_varobj_has_child_method (const struct varobj *var) |
0cc7d26f TT |
698 | { |
699 | struct cleanup *back_to; | |
bb5ce47a | 700 | PyObject *printer = var->dynamic->pretty_printer; |
0cc7d26f TT |
701 | int result; |
702 | ||
0646da15 TT |
703 | if (!gdb_python_initialized) |
704 | return 0; | |
705 | ||
0cc7d26f TT |
706 | back_to = varobj_ensure_python_env (var); |
707 | result = PyObject_HasAttr (printer, gdbpy_children_cst); | |
708 | do_cleanups (back_to); | |
709 | return result; | |
710 | } | |
576ea091 | 711 | #endif |
0cc7d26f | 712 | |
e5250216 YQ |
713 | /* A factory for creating dynamic varobj's iterators. Returns an |
714 | iterator object suitable for iterating over VAR's children. */ | |
715 | ||
716 | static struct varobj_iter * | |
717 | varobj_get_iterator (struct varobj *var) | |
718 | { | |
576ea091 | 719 | #if HAVE_PYTHON |
e5250216 YQ |
720 | if (var->dynamic->pretty_printer) |
721 | return py_varobj_get_iterator (var, var->dynamic->pretty_printer); | |
576ea091 | 722 | #endif |
e5250216 YQ |
723 | |
724 | gdb_assert_not_reached (_("\ | |
725 | requested an iterator from a non-dynamic varobj")); | |
726 | } | |
727 | ||
827f100c YQ |
728 | /* Release and clear VAR's saved item, if any. */ |
729 | ||
730 | static void | |
731 | varobj_clear_saved_item (struct varobj_dynamic *var) | |
732 | { | |
733 | if (var->saved_item != NULL) | |
734 | { | |
735 | value_free (var->saved_item->value); | |
736 | xfree (var->saved_item); | |
737 | var->saved_item = NULL; | |
738 | } | |
739 | } | |
0cc7d26f | 740 | |
b6313243 TT |
741 | static int |
742 | update_dynamic_varobj_children (struct varobj *var, | |
743 | VEC (varobj_p) **changed, | |
8264ba82 | 744 | VEC (varobj_p) **type_changed, |
fe978cb0 | 745 | VEC (varobj_p) **newobj, |
0cc7d26f TT |
746 | VEC (varobj_p) **unchanged, |
747 | int *cchanged, | |
748 | int update_children, | |
749 | int from, | |
750 | int to) | |
b6313243 | 751 | { |
b6313243 | 752 | int i; |
b6313243 | 753 | |
b6313243 | 754 | *cchanged = 0; |
b6313243 | 755 | |
bb5ce47a | 756 | if (update_children || var->dynamic->child_iter == NULL) |
b6313243 | 757 | { |
e5250216 YQ |
758 | varobj_iter_delete (var->dynamic->child_iter); |
759 | var->dynamic->child_iter = varobj_get_iterator (var); | |
b6313243 | 760 | |
827f100c | 761 | varobj_clear_saved_item (var->dynamic); |
b6313243 | 762 | |
e5250216 | 763 | i = 0; |
b6313243 | 764 | |
bb5ce47a | 765 | if (var->dynamic->child_iter == NULL) |
827f100c | 766 | return 0; |
b6313243 | 767 | } |
0cc7d26f TT |
768 | else |
769 | i = VEC_length (varobj_p, var->children); | |
b6313243 | 770 | |
0cc7d26f TT |
771 | /* We ask for one extra child, so that MI can report whether there |
772 | are more children. */ | |
773 | for (; to < 0 || i < to + 1; ++i) | |
b6313243 | 774 | { |
827f100c | 775 | varobj_item *item; |
b6313243 | 776 | |
0cc7d26f | 777 | /* See if there was a leftover from last time. */ |
827f100c | 778 | if (var->dynamic->saved_item != NULL) |
0cc7d26f | 779 | { |
bb5ce47a YQ |
780 | item = var->dynamic->saved_item; |
781 | var->dynamic->saved_item = NULL; | |
0cc7d26f TT |
782 | } |
783 | else | |
a4c8e806 | 784 | { |
e5250216 | 785 | item = varobj_iter_next (var->dynamic->child_iter); |
827f100c YQ |
786 | /* Release vitem->value so its lifetime is not bound to the |
787 | execution of a command. */ | |
788 | if (item != NULL && item->value != NULL) | |
789 | release_value_or_incref (item->value); | |
a4c8e806 | 790 | } |
b6313243 | 791 | |
e5250216 YQ |
792 | if (item == NULL) |
793 | { | |
794 | /* Iteration is done. Remove iterator from VAR. */ | |
795 | varobj_iter_delete (var->dynamic->child_iter); | |
796 | var->dynamic->child_iter = NULL; | |
797 | break; | |
798 | } | |
0cc7d26f TT |
799 | /* We don't want to push the extra child on any report list. */ |
800 | if (to < 0 || i < to) | |
b6313243 | 801 | { |
0cc7d26f TT |
802 | int can_mention = from < 0 || i >= from; |
803 | ||
0cc7d26f | 804 | install_dynamic_child (var, can_mention ? changed : NULL, |
8264ba82 | 805 | can_mention ? type_changed : NULL, |
fe978cb0 | 806 | can_mention ? newobj : NULL, |
0cc7d26f | 807 | can_mention ? unchanged : NULL, |
5e5ac9a5 | 808 | can_mention ? cchanged : NULL, i, |
827f100c YQ |
809 | item); |
810 | ||
811 | xfree (item); | |
b6313243 | 812 | } |
0cc7d26f | 813 | else |
b6313243 | 814 | { |
bb5ce47a | 815 | var->dynamic->saved_item = item; |
b6313243 | 816 | |
0cc7d26f TT |
817 | /* We want to truncate the child list just before this |
818 | element. */ | |
819 | break; | |
820 | } | |
b6313243 TT |
821 | } |
822 | ||
823 | if (i < VEC_length (varobj_p, var->children)) | |
824 | { | |
0cc7d26f | 825 | int j; |
a109c7c1 | 826 | |
0cc7d26f TT |
827 | *cchanged = 1; |
828 | for (j = i; j < VEC_length (varobj_p, var->children); ++j) | |
30914ca8 | 829 | varobj_delete (VEC_index (varobj_p, var->children, j), 0); |
0cc7d26f | 830 | VEC_truncate (varobj_p, var->children, i); |
b6313243 | 831 | } |
0cc7d26f TT |
832 | |
833 | /* If there are fewer children than requested, note that the list of | |
834 | children changed. */ | |
835 | if (to >= 0 && VEC_length (varobj_p, var->children) < to) | |
836 | *cchanged = 1; | |
837 | ||
b6313243 | 838 | var->num_children = VEC_length (varobj_p, var->children); |
b6313243 | 839 | |
b6313243 | 840 | return 1; |
b6313243 | 841 | } |
25d5ea92 | 842 | |
8b93c638 JM |
843 | int |
844 | varobj_get_num_children (struct varobj *var) | |
845 | { | |
846 | if (var->num_children == -1) | |
b6313243 | 847 | { |
31f628ae | 848 | if (varobj_is_dynamic_p (var)) |
0cc7d26f TT |
849 | { |
850 | int dummy; | |
851 | ||
852 | /* If we have a dynamic varobj, don't report -1 children. | |
853 | So, try to fetch some children first. */ | |
8264ba82 | 854 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, &dummy, |
0cc7d26f TT |
855 | 0, 0, 0); |
856 | } | |
857 | else | |
b6313243 TT |
858 | var->num_children = number_of_children (var); |
859 | } | |
8b93c638 | 860 | |
0cc7d26f | 861 | return var->num_children >= 0 ? var->num_children : 0; |
8b93c638 JM |
862 | } |
863 | ||
864 | /* Creates a list of the immediate children of a variable object; | |
581e13c1 | 865 | the return code is the number of such children or -1 on error. */ |
8b93c638 | 866 | |
d56d46f5 | 867 | VEC (varobj_p)* |
0cc7d26f | 868 | varobj_list_children (struct varobj *var, int *from, int *to) |
8b93c638 | 869 | { |
8b93c638 | 870 | char *name; |
b6313243 TT |
871 | int i, children_changed; |
872 | ||
bb5ce47a | 873 | var->dynamic->children_requested = 1; |
b6313243 | 874 | |
31f628ae | 875 | if (varobj_is_dynamic_p (var)) |
0cc7d26f | 876 | { |
b6313243 TT |
877 | /* This, in theory, can result in the number of children changing without |
878 | frontend noticing. But well, calling -var-list-children on the same | |
879 | varobj twice is not something a sane frontend would do. */ | |
8264ba82 AG |
880 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, |
881 | &children_changed, 0, 0, *to); | |
99ad9427 | 882 | varobj_restrict_range (var->children, from, to); |
0cc7d26f TT |
883 | return var->children; |
884 | } | |
8b93c638 | 885 | |
8b93c638 JM |
886 | if (var->num_children == -1) |
887 | var->num_children = number_of_children (var); | |
888 | ||
74a44383 DJ |
889 | /* If that failed, give up. */ |
890 | if (var->num_children == -1) | |
d56d46f5 | 891 | return var->children; |
74a44383 | 892 | |
28335dcc VP |
893 | /* If we're called when the list of children is not yet initialized, |
894 | allocate enough elements in it. */ | |
895 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
896 | VEC_safe_push (varobj_p, var->children, NULL); | |
897 | ||
8b93c638 JM |
898 | for (i = 0; i < var->num_children; i++) |
899 | { | |
d56d46f5 | 900 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
901 | |
902 | if (existing == NULL) | |
903 | { | |
904 | /* Either it's the first call to varobj_list_children for | |
905 | this variable object, and the child was never created, | |
906 | or it was explicitly deleted by the client. */ | |
907 | name = name_of_child (var, i); | |
908 | existing = create_child (var, i, name); | |
909 | VEC_replace (varobj_p, var->children, i, existing); | |
910 | } | |
8b93c638 JM |
911 | } |
912 | ||
99ad9427 | 913 | varobj_restrict_range (var->children, from, to); |
d56d46f5 | 914 | return var->children; |
8b93c638 JM |
915 | } |
916 | ||
b6313243 | 917 | static struct varobj * |
5a2e0d6e | 918 | varobj_add_child (struct varobj *var, struct varobj_item *item) |
b6313243 | 919 | { |
5a2e0d6e | 920 | varobj_p v = create_child_with_value (var, |
b6313243 | 921 | VEC_length (varobj_p, var->children), |
5a2e0d6e | 922 | item); |
a109c7c1 | 923 | |
b6313243 | 924 | VEC_safe_push (varobj_p, var->children, v); |
b6313243 TT |
925 | return v; |
926 | } | |
927 | ||
8b93c638 | 928 | /* Obtain the type of an object Variable as a string similar to the one gdb |
afa269ae SM |
929 | prints on the console. The caller is responsible for freeing the string. |
930 | */ | |
8b93c638 JM |
931 | |
932 | char * | |
933 | varobj_get_type (struct varobj *var) | |
934 | { | |
8ab91b96 | 935 | /* For the "fake" variables, do not return a type. (Its type is |
8756216b DP |
936 | NULL, too.) |
937 | Do not return a type for invalid variables as well. */ | |
938 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
939 | return NULL; |
940 | ||
1a4300e9 | 941 | return type_to_string (var->type); |
8b93c638 JM |
942 | } |
943 | ||
1ecb4ee0 DJ |
944 | /* Obtain the type of an object variable. */ |
945 | ||
946 | struct type * | |
b09e2c59 | 947 | varobj_get_gdb_type (const struct varobj *var) |
1ecb4ee0 DJ |
948 | { |
949 | return var->type; | |
950 | } | |
951 | ||
85254831 KS |
952 | /* Is VAR a path expression parent, i.e., can it be used to construct |
953 | a valid path expression? */ | |
954 | ||
955 | static int | |
b09e2c59 | 956 | is_path_expr_parent (const struct varobj *var) |
85254831 | 957 | { |
9a9a7608 AB |
958 | gdb_assert (var->root->lang_ops->is_path_expr_parent != NULL); |
959 | return var->root->lang_ops->is_path_expr_parent (var); | |
960 | } | |
85254831 | 961 | |
9a9a7608 AB |
962 | /* Is VAR a path expression parent, i.e., can it be used to construct |
963 | a valid path expression? By default we assume any VAR can be a path | |
964 | parent. */ | |
85254831 | 965 | |
9a9a7608 | 966 | int |
b09e2c59 | 967 | varobj_default_is_path_expr_parent (const struct varobj *var) |
9a9a7608 AB |
968 | { |
969 | return 1; | |
85254831 KS |
970 | } |
971 | ||
972 | /* Return the path expression parent for VAR. */ | |
973 | ||
c1cc6152 SM |
974 | const struct varobj * |
975 | varobj_get_path_expr_parent (const struct varobj *var) | |
85254831 | 976 | { |
c1cc6152 | 977 | const struct varobj *parent = var; |
85254831 KS |
978 | |
979 | while (!is_root_p (parent) && !is_path_expr_parent (parent)) | |
980 | parent = parent->parent; | |
981 | ||
982 | return parent; | |
983 | } | |
984 | ||
02142340 VP |
985 | /* Return a pointer to the full rooted expression of varobj VAR. |
986 | If it has not been computed yet, compute it. */ | |
987 | char * | |
c1cc6152 | 988 | varobj_get_path_expr (const struct varobj *var) |
02142340 | 989 | { |
2568868e | 990 | if (var->path_expr == NULL) |
02142340 VP |
991 | { |
992 | /* For root varobjs, we initialize path_expr | |
993 | when creating varobj, so here it should be | |
994 | child varobj. */ | |
c1cc6152 | 995 | struct varobj *mutable_var = (struct varobj *) var; |
02142340 | 996 | gdb_assert (!is_root_p (var)); |
2568868e | 997 | |
c1cc6152 | 998 | mutable_var->path_expr = (*var->root->lang_ops->path_expr_of_child) (var); |
02142340 | 999 | } |
2568868e SM |
1000 | |
1001 | return var->path_expr; | |
02142340 VP |
1002 | } |
1003 | ||
fa4d0c40 | 1004 | const struct language_defn * |
b09e2c59 | 1005 | varobj_get_language (const struct varobj *var) |
8b93c638 | 1006 | { |
fa4d0c40 | 1007 | return var->root->exp->language_defn; |
8b93c638 JM |
1008 | } |
1009 | ||
1010 | int | |
b09e2c59 | 1011 | varobj_get_attributes (const struct varobj *var) |
8b93c638 JM |
1012 | { |
1013 | int attributes = 0; | |
1014 | ||
340a7723 | 1015 | if (varobj_editable_p (var)) |
581e13c1 | 1016 | /* FIXME: define masks for attributes. */ |
8b93c638 JM |
1017 | attributes |= 0x00000001; /* Editable */ |
1018 | ||
1019 | return attributes; | |
1020 | } | |
1021 | ||
cde5ef40 YQ |
1022 | /* Return true if VAR is a dynamic varobj. */ |
1023 | ||
0cc7d26f | 1024 | int |
b09e2c59 | 1025 | varobj_is_dynamic_p (const struct varobj *var) |
0cc7d26f | 1026 | { |
bb5ce47a | 1027 | return var->dynamic->pretty_printer != NULL; |
0cc7d26f TT |
1028 | } |
1029 | ||
de051565 MK |
1030 | char * |
1031 | varobj_get_formatted_value (struct varobj *var, | |
1032 | enum varobj_display_formats format) | |
1033 | { | |
1034 | return my_value_of_variable (var, format); | |
1035 | } | |
1036 | ||
8b93c638 JM |
1037 | char * |
1038 | varobj_get_value (struct varobj *var) | |
1039 | { | |
de051565 | 1040 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
1041 | } |
1042 | ||
1043 | /* Set the value of an object variable (if it is editable) to the | |
581e13c1 MS |
1044 | value of the given expression. */ |
1045 | /* Note: Invokes functions that can call error(). */ | |
8b93c638 JM |
1046 | |
1047 | int | |
1048 | varobj_set_value (struct varobj *var, char *expression) | |
1049 | { | |
34365054 | 1050 | struct value *val = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1051 | /* The argument "expression" contains the variable's new value. |
581e13c1 MS |
1052 | We need to first construct a legal expression for this -- ugh! */ |
1053 | /* Does this cover all the bases? */ | |
8b93c638 | 1054 | struct expression *exp; |
34365054 | 1055 | struct value *value = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1056 | int saved_input_radix = input_radix; |
bbc13ae3 | 1057 | const char *s = expression; |
8b93c638 | 1058 | |
340a7723 | 1059 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 1060 | |
581e13c1 | 1061 | input_radix = 10; /* ALWAYS reset to decimal temporarily. */ |
1bb9788d | 1062 | exp = parse_exp_1 (&s, 0, 0, 0); |
492d29ea | 1063 | TRY |
8e7b59a5 KS |
1064 | { |
1065 | value = evaluate_expression (exp); | |
1066 | } | |
1067 | ||
492d29ea | 1068 | CATCH (except, RETURN_MASK_ERROR) |
340a7723 | 1069 | { |
581e13c1 | 1070 | /* We cannot proceed without a valid expression. */ |
340a7723 NR |
1071 | xfree (exp); |
1072 | return 0; | |
8b93c638 | 1073 | } |
492d29ea | 1074 | END_CATCH |
8b93c638 | 1075 | |
340a7723 NR |
1076 | /* All types that are editable must also be changeable. */ |
1077 | gdb_assert (varobj_value_is_changeable_p (var)); | |
1078 | ||
1079 | /* The value of a changeable variable object must not be lazy. */ | |
1080 | gdb_assert (!value_lazy (var->value)); | |
1081 | ||
1082 | /* Need to coerce the input. We want to check if the | |
1083 | value of the variable object will be different | |
1084 | after assignment, and the first thing value_assign | |
1085 | does is coerce the input. | |
1086 | For example, if we are assigning an array to a pointer variable we | |
b021a221 | 1087 | should compare the pointer with the array's address, not with the |
340a7723 NR |
1088 | array's content. */ |
1089 | value = coerce_array (value); | |
1090 | ||
8e7b59a5 KS |
1091 | /* The new value may be lazy. value_assign, or |
1092 | rather value_contents, will take care of this. */ | |
492d29ea | 1093 | TRY |
8e7b59a5 KS |
1094 | { |
1095 | val = value_assign (var->value, value); | |
1096 | } | |
1097 | ||
492d29ea PA |
1098 | CATCH (except, RETURN_MASK_ERROR) |
1099 | { | |
1100 | return 0; | |
1101 | } | |
1102 | END_CATCH | |
8e7b59a5 | 1103 | |
340a7723 NR |
1104 | /* If the value has changed, record it, so that next -var-update can |
1105 | report this change. If a variable had a value of '1', we've set it | |
1106 | to '333' and then set again to '1', when -var-update will report this | |
1107 | variable as changed -- because the first assignment has set the | |
1108 | 'updated' flag. There's no need to optimize that, because return value | |
1109 | of -var-update should be considered an approximation. */ | |
581e13c1 | 1110 | var->updated = install_new_value (var, val, 0 /* Compare values. */); |
340a7723 NR |
1111 | input_radix = saved_input_radix; |
1112 | return 1; | |
8b93c638 JM |
1113 | } |
1114 | ||
0cc7d26f TT |
1115 | #if HAVE_PYTHON |
1116 | ||
1117 | /* A helper function to install a constructor function and visualizer | |
bb5ce47a | 1118 | in a varobj_dynamic. */ |
0cc7d26f TT |
1119 | |
1120 | static void | |
bb5ce47a | 1121 | install_visualizer (struct varobj_dynamic *var, PyObject *constructor, |
0cc7d26f TT |
1122 | PyObject *visualizer) |
1123 | { | |
1124 | Py_XDECREF (var->constructor); | |
1125 | var->constructor = constructor; | |
1126 | ||
1127 | Py_XDECREF (var->pretty_printer); | |
1128 | var->pretty_printer = visualizer; | |
1129 | ||
e5250216 | 1130 | varobj_iter_delete (var->child_iter); |
0cc7d26f TT |
1131 | var->child_iter = NULL; |
1132 | } | |
1133 | ||
1134 | /* Install the default visualizer for VAR. */ | |
1135 | ||
1136 | static void | |
1137 | install_default_visualizer (struct varobj *var) | |
1138 | { | |
d65aec65 PM |
1139 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1140 | if (CPLUS_FAKE_CHILD (var)) | |
1141 | return; | |
1142 | ||
0cc7d26f TT |
1143 | if (pretty_printing) |
1144 | { | |
1145 | PyObject *pretty_printer = NULL; | |
1146 | ||
1147 | if (var->value) | |
1148 | { | |
1149 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value); | |
1150 | if (! pretty_printer) | |
1151 | { | |
1152 | gdbpy_print_stack (); | |
1153 | error (_("Cannot instantiate printer for default visualizer")); | |
1154 | } | |
1155 | } | |
1156 | ||
1157 | if (pretty_printer == Py_None) | |
1158 | { | |
1159 | Py_DECREF (pretty_printer); | |
1160 | pretty_printer = NULL; | |
1161 | } | |
1162 | ||
bb5ce47a | 1163 | install_visualizer (var->dynamic, NULL, pretty_printer); |
0cc7d26f TT |
1164 | } |
1165 | } | |
1166 | ||
1167 | /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to | |
1168 | make a new object. */ | |
1169 | ||
1170 | static void | |
1171 | construct_visualizer (struct varobj *var, PyObject *constructor) | |
1172 | { | |
1173 | PyObject *pretty_printer; | |
1174 | ||
d65aec65 PM |
1175 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1176 | if (CPLUS_FAKE_CHILD (var)) | |
1177 | return; | |
1178 | ||
0cc7d26f TT |
1179 | Py_INCREF (constructor); |
1180 | if (constructor == Py_None) | |
1181 | pretty_printer = NULL; | |
1182 | else | |
1183 | { | |
1184 | pretty_printer = instantiate_pretty_printer (constructor, var->value); | |
1185 | if (! pretty_printer) | |
1186 | { | |
1187 | gdbpy_print_stack (); | |
1188 | Py_DECREF (constructor); | |
1189 | constructor = Py_None; | |
1190 | Py_INCREF (constructor); | |
1191 | } | |
1192 | ||
1193 | if (pretty_printer == Py_None) | |
1194 | { | |
1195 | Py_DECREF (pretty_printer); | |
1196 | pretty_printer = NULL; | |
1197 | } | |
1198 | } | |
1199 | ||
bb5ce47a | 1200 | install_visualizer (var->dynamic, constructor, pretty_printer); |
0cc7d26f TT |
1201 | } |
1202 | ||
1203 | #endif /* HAVE_PYTHON */ | |
1204 | ||
1205 | /* A helper function for install_new_value. This creates and installs | |
1206 | a visualizer for VAR, if appropriate. */ | |
1207 | ||
1208 | static void | |
1209 | install_new_value_visualizer (struct varobj *var) | |
1210 | { | |
1211 | #if HAVE_PYTHON | |
1212 | /* If the constructor is None, then we want the raw value. If VAR | |
1213 | does not have a value, just skip this. */ | |
0646da15 TT |
1214 | if (!gdb_python_initialized) |
1215 | return; | |
1216 | ||
bb5ce47a | 1217 | if (var->dynamic->constructor != Py_None && var->value != NULL) |
0cc7d26f TT |
1218 | { |
1219 | struct cleanup *cleanup; | |
0cc7d26f TT |
1220 | |
1221 | cleanup = varobj_ensure_python_env (var); | |
1222 | ||
bb5ce47a | 1223 | if (var->dynamic->constructor == NULL) |
0cc7d26f TT |
1224 | install_default_visualizer (var); |
1225 | else | |
bb5ce47a | 1226 | construct_visualizer (var, var->dynamic->constructor); |
0cc7d26f TT |
1227 | |
1228 | do_cleanups (cleanup); | |
1229 | } | |
1230 | #else | |
1231 | /* Do nothing. */ | |
1232 | #endif | |
1233 | } | |
1234 | ||
8264ba82 AG |
1235 | /* When using RTTI to determine variable type it may be changed in runtime when |
1236 | the variable value is changed. This function checks whether type of varobj | |
1237 | VAR will change when a new value NEW_VALUE is assigned and if it is so | |
1238 | updates the type of VAR. */ | |
1239 | ||
1240 | static int | |
1241 | update_type_if_necessary (struct varobj *var, struct value *new_value) | |
1242 | { | |
1243 | if (new_value) | |
1244 | { | |
1245 | struct value_print_options opts; | |
1246 | ||
1247 | get_user_print_options (&opts); | |
1248 | if (opts.objectprint) | |
1249 | { | |
1250 | struct type *new_type; | |
1251 | char *curr_type_str, *new_type_str; | |
afa269ae | 1252 | int type_name_changed; |
8264ba82 AG |
1253 | |
1254 | new_type = value_actual_type (new_value, 0, 0); | |
1255 | new_type_str = type_to_string (new_type); | |
1256 | curr_type_str = varobj_get_type (var); | |
afa269ae SM |
1257 | type_name_changed = strcmp (curr_type_str, new_type_str) != 0; |
1258 | xfree (curr_type_str); | |
1259 | xfree (new_type_str); | |
1260 | ||
1261 | if (type_name_changed) | |
8264ba82 AG |
1262 | { |
1263 | var->type = new_type; | |
1264 | ||
1265 | /* This information may be not valid for a new type. */ | |
30914ca8 | 1266 | varobj_delete (var, 1); |
8264ba82 AG |
1267 | VEC_free (varobj_p, var->children); |
1268 | var->num_children = -1; | |
1269 | return 1; | |
1270 | } | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | return 0; | |
1275 | } | |
1276 | ||
acd65feb VP |
1277 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
1278 | this is the first assignement after the variable object was just | |
1279 | created, or changed type. In that case, just assign the value | |
1280 | and return 0. | |
581e13c1 MS |
1281 | Otherwise, assign the new value, and return 1 if the value is |
1282 | different from the current one, 0 otherwise. The comparison is | |
1283 | done on textual representation of value. Therefore, some types | |
1284 | need not be compared. E.g. for structures the reported value is | |
1285 | always "{...}", so no comparison is necessary here. If the old | |
1286 | value was NULL and new one is not, or vice versa, we always return 1. | |
b26ed50d VP |
1287 | |
1288 | The VALUE parameter should not be released -- the function will | |
1289 | take care of releasing it when needed. */ | |
acd65feb VP |
1290 | static int |
1291 | install_new_value (struct varobj *var, struct value *value, int initial) | |
1292 | { | |
1293 | int changeable; | |
1294 | int need_to_fetch; | |
1295 | int changed = 0; | |
25d5ea92 | 1296 | int intentionally_not_fetched = 0; |
7a4d50bf | 1297 | char *print_value = NULL; |
acd65feb | 1298 | |
acd65feb | 1299 | /* We need to know the varobj's type to decide if the value should |
3e43a32a | 1300 | be fetched or not. C++ fake children (public/protected/private) |
581e13c1 | 1301 | don't have a type. */ |
acd65feb | 1302 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); |
b2c2bd75 | 1303 | changeable = varobj_value_is_changeable_p (var); |
b6313243 TT |
1304 | |
1305 | /* If the type has custom visualizer, we consider it to be always | |
581e13c1 | 1306 | changeable. FIXME: need to make sure this behaviour will not |
b6313243 | 1307 | mess up read-sensitive values. */ |
bb5ce47a | 1308 | if (var->dynamic->pretty_printer != NULL) |
b6313243 TT |
1309 | changeable = 1; |
1310 | ||
acd65feb VP |
1311 | need_to_fetch = changeable; |
1312 | ||
b26ed50d VP |
1313 | /* We are not interested in the address of references, and given |
1314 | that in C++ a reference is not rebindable, it cannot | |
1315 | meaningfully change. So, get hold of the real value. */ | |
1316 | if (value) | |
0cc7d26f | 1317 | value = coerce_ref (value); |
b26ed50d | 1318 | |
acd65feb VP |
1319 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1320 | /* For unions, we need to fetch the value implicitly because | |
1321 | of implementation of union member fetch. When gdb | |
1322 | creates a value for a field and the value of the enclosing | |
1323 | structure is not lazy, it immediately copies the necessary | |
1324 | bytes from the enclosing values. If the enclosing value is | |
1325 | lazy, the call to value_fetch_lazy on the field will read | |
1326 | the data from memory. For unions, that means we'll read the | |
1327 | same memory more than once, which is not desirable. So | |
1328 | fetch now. */ | |
1329 | need_to_fetch = 1; | |
1330 | ||
1331 | /* The new value might be lazy. If the type is changeable, | |
1332 | that is we'll be comparing values of this type, fetch the | |
1333 | value now. Otherwise, on the next update the old value | |
1334 | will be lazy, which means we've lost that old value. */ | |
1335 | if (need_to_fetch && value && value_lazy (value)) | |
1336 | { | |
c1cc6152 | 1337 | const struct varobj *parent = var->parent; |
25d5ea92 | 1338 | int frozen = var->frozen; |
a109c7c1 | 1339 | |
25d5ea92 VP |
1340 | for (; !frozen && parent; parent = parent->parent) |
1341 | frozen |= parent->frozen; | |
1342 | ||
1343 | if (frozen && initial) | |
1344 | { | |
1345 | /* For variables that are frozen, or are children of frozen | |
1346 | variables, we don't do fetch on initial assignment. | |
1347 | For non-initial assignemnt we do the fetch, since it means we're | |
1348 | explicitly asked to compare the new value with the old one. */ | |
1349 | intentionally_not_fetched = 1; | |
1350 | } | |
8e7b59a5 | 1351 | else |
acd65feb | 1352 | { |
8e7b59a5 | 1353 | |
492d29ea | 1354 | TRY |
8e7b59a5 KS |
1355 | { |
1356 | value_fetch_lazy (value); | |
1357 | } | |
1358 | ||
492d29ea | 1359 | CATCH (except, RETURN_MASK_ERROR) |
8e7b59a5 KS |
1360 | { |
1361 | /* Set the value to NULL, so that for the next -var-update, | |
1362 | we don't try to compare the new value with this value, | |
1363 | that we couldn't even read. */ | |
1364 | value = NULL; | |
1365 | } | |
492d29ea | 1366 | END_CATCH |
acd65feb | 1367 | } |
acd65feb VP |
1368 | } |
1369 | ||
e848a8a5 TT |
1370 | /* Get a reference now, before possibly passing it to any Python |
1371 | code that might release it. */ | |
1372 | if (value != NULL) | |
1373 | value_incref (value); | |
b6313243 | 1374 | |
7a4d50bf VP |
1375 | /* Below, we'll be comparing string rendering of old and new |
1376 | values. Don't get string rendering if the value is | |
1377 | lazy -- if it is, the code above has decided that the value | |
1378 | should not be fetched. */ | |
bb5ce47a YQ |
1379 | if (value != NULL && !value_lazy (value) |
1380 | && var->dynamic->pretty_printer == NULL) | |
99ad9427 | 1381 | print_value = varobj_value_get_print_value (value, var->format, var); |
7a4d50bf | 1382 | |
acd65feb VP |
1383 | /* If the type is changeable, compare the old and the new values. |
1384 | If this is the initial assignment, we don't have any old value | |
1385 | to compare with. */ | |
7a4d50bf | 1386 | if (!initial && changeable) |
acd65feb | 1387 | { |
3e43a32a MS |
1388 | /* If the value of the varobj was changed by -var-set-value, |
1389 | then the value in the varobj and in the target is the same. | |
1390 | However, that value is different from the value that the | |
581e13c1 | 1391 | varobj had after the previous -var-update. So need to the |
3e43a32a | 1392 | varobj as changed. */ |
acd65feb | 1393 | if (var->updated) |
57e66780 | 1394 | { |
57e66780 DJ |
1395 | changed = 1; |
1396 | } | |
bb5ce47a | 1397 | else if (var->dynamic->pretty_printer == NULL) |
acd65feb VP |
1398 | { |
1399 | /* Try to compare the values. That requires that both | |
1400 | values are non-lazy. */ | |
25d5ea92 VP |
1401 | if (var->not_fetched && value_lazy (var->value)) |
1402 | { | |
1403 | /* This is a frozen varobj and the value was never read. | |
1404 | Presumably, UI shows some "never read" indicator. | |
1405 | Now that we've fetched the real value, we need to report | |
1406 | this varobj as changed so that UI can show the real | |
1407 | value. */ | |
1408 | changed = 1; | |
1409 | } | |
1410 | else if (var->value == NULL && value == NULL) | |
581e13c1 | 1411 | /* Equal. */ |
acd65feb VP |
1412 | ; |
1413 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1414 | { |
57e66780 DJ |
1415 | changed = 1; |
1416 | } | |
acd65feb VP |
1417 | else |
1418 | { | |
1419 | gdb_assert (!value_lazy (var->value)); | |
1420 | gdb_assert (!value_lazy (value)); | |
85265413 | 1421 | |
57e66780 | 1422 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1423 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1424 | changed = 1; |
acd65feb VP |
1425 | } |
1426 | } | |
1427 | } | |
85265413 | 1428 | |
ee342b23 VP |
1429 | if (!initial && !changeable) |
1430 | { | |
1431 | /* For values that are not changeable, we don't compare the values. | |
1432 | However, we want to notice if a value was not NULL and now is NULL, | |
1433 | or vise versa, so that we report when top-level varobjs come in scope | |
1434 | and leave the scope. */ | |
1435 | changed = (var->value != NULL) != (value != NULL); | |
1436 | } | |
1437 | ||
acd65feb | 1438 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1439 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1440 | value_free (var->value); |
1441 | var->value = value; | |
25d5ea92 VP |
1442 | if (value && value_lazy (value) && intentionally_not_fetched) |
1443 | var->not_fetched = 1; | |
1444 | else | |
1445 | var->not_fetched = 0; | |
acd65feb | 1446 | var->updated = 0; |
85265413 | 1447 | |
0cc7d26f TT |
1448 | install_new_value_visualizer (var); |
1449 | ||
1450 | /* If we installed a pretty-printer, re-compare the printed version | |
1451 | to see if the variable changed. */ | |
bb5ce47a | 1452 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f TT |
1453 | { |
1454 | xfree (print_value); | |
99ad9427 YQ |
1455 | print_value = varobj_value_get_print_value (var->value, var->format, |
1456 | var); | |
e8f781e2 TT |
1457 | if ((var->print_value == NULL && print_value != NULL) |
1458 | || (var->print_value != NULL && print_value == NULL) | |
1459 | || (var->print_value != NULL && print_value != NULL | |
1460 | && strcmp (var->print_value, print_value) != 0)) | |
0cc7d26f TT |
1461 | changed = 1; |
1462 | } | |
1463 | if (var->print_value) | |
1464 | xfree (var->print_value); | |
1465 | var->print_value = print_value; | |
1466 | ||
b26ed50d | 1467 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1468 | |
1469 | return changed; | |
1470 | } | |
acd65feb | 1471 | |
0cc7d26f TT |
1472 | /* Return the requested range for a varobj. VAR is the varobj. FROM |
1473 | and TO are out parameters; *FROM and *TO will be set to the | |
1474 | selected sub-range of VAR. If no range was selected using | |
1475 | -var-set-update-range, then both will be -1. */ | |
1476 | void | |
b09e2c59 | 1477 | varobj_get_child_range (const struct varobj *var, int *from, int *to) |
b6313243 | 1478 | { |
0cc7d26f TT |
1479 | *from = var->from; |
1480 | *to = var->to; | |
b6313243 TT |
1481 | } |
1482 | ||
0cc7d26f TT |
1483 | /* Set the selected sub-range of children of VAR to start at index |
1484 | FROM and end at index TO. If either FROM or TO is less than zero, | |
1485 | this is interpreted as a request for all children. */ | |
1486 | void | |
1487 | varobj_set_child_range (struct varobj *var, int from, int to) | |
b6313243 | 1488 | { |
0cc7d26f TT |
1489 | var->from = from; |
1490 | var->to = to; | |
b6313243 TT |
1491 | } |
1492 | ||
1493 | void | |
1494 | varobj_set_visualizer (struct varobj *var, const char *visualizer) | |
1495 | { | |
1496 | #if HAVE_PYTHON | |
34fa1d9d MS |
1497 | PyObject *mainmod, *globals, *constructor; |
1498 | struct cleanup *back_to; | |
b6313243 | 1499 | |
0646da15 TT |
1500 | if (!gdb_python_initialized) |
1501 | return; | |
1502 | ||
d452c4bc | 1503 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
1504 | |
1505 | mainmod = PyImport_AddModule ("__main__"); | |
1506 | globals = PyModule_GetDict (mainmod); | |
1507 | Py_INCREF (globals); | |
1508 | make_cleanup_py_decref (globals); | |
1509 | ||
1510 | constructor = PyRun_String (visualizer, Py_eval_input, globals, globals); | |
b6313243 | 1511 | |
0cc7d26f | 1512 | if (! constructor) |
b6313243 TT |
1513 | { |
1514 | gdbpy_print_stack (); | |
da1f2771 | 1515 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
b6313243 TT |
1516 | } |
1517 | ||
0cc7d26f TT |
1518 | construct_visualizer (var, constructor); |
1519 | Py_XDECREF (constructor); | |
b6313243 | 1520 | |
0cc7d26f | 1521 | /* If there are any children now, wipe them. */ |
30914ca8 | 1522 | varobj_delete (var, 1 /* children only */); |
0cc7d26f | 1523 | var->num_children = -1; |
b6313243 TT |
1524 | |
1525 | do_cleanups (back_to); | |
1526 | #else | |
da1f2771 | 1527 | error (_("Python support required")); |
b6313243 TT |
1528 | #endif |
1529 | } | |
1530 | ||
7a290c40 JB |
1531 | /* If NEW_VALUE is the new value of the given varobj (var), return |
1532 | non-zero if var has mutated. In other words, if the type of | |
1533 | the new value is different from the type of the varobj's old | |
1534 | value. | |
1535 | ||
1536 | NEW_VALUE may be NULL, if the varobj is now out of scope. */ | |
1537 | ||
1538 | static int | |
b09e2c59 | 1539 | varobj_value_has_mutated (const struct varobj *var, struct value *new_value, |
7a290c40 JB |
1540 | struct type *new_type) |
1541 | { | |
1542 | /* If we haven't previously computed the number of children in var, | |
1543 | it does not matter from the front-end's perspective whether | |
1544 | the type has mutated or not. For all intents and purposes, | |
1545 | it has not mutated. */ | |
1546 | if (var->num_children < 0) | |
1547 | return 0; | |
1548 | ||
ca20d462 | 1549 | if (var->root->lang_ops->value_has_mutated) |
8776cfe9 JB |
1550 | { |
1551 | /* The varobj module, when installing new values, explicitly strips | |
1552 | references, saying that we're not interested in those addresses. | |
1553 | But detection of mutation happens before installing the new | |
1554 | value, so our value may be a reference that we need to strip | |
1555 | in order to remain consistent. */ | |
1556 | if (new_value != NULL) | |
1557 | new_value = coerce_ref (new_value); | |
1558 | return var->root->lang_ops->value_has_mutated (var, new_value, new_type); | |
1559 | } | |
7a290c40 JB |
1560 | else |
1561 | return 0; | |
1562 | } | |
1563 | ||
8b93c638 JM |
1564 | /* Update the values for a variable and its children. This is a |
1565 | two-pronged attack. First, re-parse the value for the root's | |
1566 | expression to see if it's changed. Then go all the way | |
1567 | through its children, reconstructing them and noting if they've | |
1568 | changed. | |
1569 | ||
25d5ea92 VP |
1570 | The EXPLICIT parameter specifies if this call is result |
1571 | of MI request to update this specific variable, or | |
581e13c1 | 1572 | result of implicit -var-update *. For implicit request, we don't |
25d5ea92 | 1573 | update frozen variables. |
705da579 | 1574 | |
581e13c1 | 1575 | NOTE: This function may delete the caller's varobj. If it |
8756216b DP |
1576 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1577 | to point to the new varobj. */ | |
8b93c638 | 1578 | |
1417b39d | 1579 | VEC(varobj_update_result) * |
fe978cb0 | 1580 | varobj_update (struct varobj **varp, int is_explicit) |
8b93c638 | 1581 | { |
25d5ea92 | 1582 | int type_changed = 0; |
8b93c638 | 1583 | int i; |
fe978cb0 | 1584 | struct value *newobj; |
b6313243 | 1585 | VEC (varobj_update_result) *stack = NULL; |
f7f9ae2c | 1586 | VEC (varobj_update_result) *result = NULL; |
8b93c638 | 1587 | |
25d5ea92 VP |
1588 | /* Frozen means frozen -- we don't check for any change in |
1589 | this varobj, including its going out of scope, or | |
1590 | changing type. One use case for frozen varobjs is | |
1591 | retaining previously evaluated expressions, and we don't | |
1592 | want them to be reevaluated at all. */ | |
fe978cb0 | 1593 | if (!is_explicit && (*varp)->frozen) |
f7f9ae2c | 1594 | return result; |
8756216b DP |
1595 | |
1596 | if (!(*varp)->root->is_valid) | |
f7f9ae2c | 1597 | { |
cfce2ea2 | 1598 | varobj_update_result r = {0}; |
a109c7c1 | 1599 | |
cfce2ea2 | 1600 | r.varobj = *varp; |
f7f9ae2c VP |
1601 | r.status = VAROBJ_INVALID; |
1602 | VEC_safe_push (varobj_update_result, result, &r); | |
1603 | return result; | |
1604 | } | |
8b93c638 | 1605 | |
25d5ea92 | 1606 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1607 | { |
cfce2ea2 | 1608 | varobj_update_result r = {0}; |
a109c7c1 | 1609 | |
cfce2ea2 | 1610 | r.varobj = *varp; |
f7f9ae2c VP |
1611 | r.status = VAROBJ_IN_SCOPE; |
1612 | ||
581e13c1 | 1613 | /* Update the root variable. value_of_root can return NULL |
25d5ea92 | 1614 | if the variable is no longer around, i.e. we stepped out of |
581e13c1 | 1615 | the frame in which a local existed. We are letting the |
25d5ea92 VP |
1616 | value_of_root variable dispose of the varobj if the type |
1617 | has changed. */ | |
fe978cb0 PA |
1618 | newobj = value_of_root (varp, &type_changed); |
1619 | if (update_type_if_necessary(*varp, newobj)) | |
8264ba82 | 1620 | type_changed = 1; |
f7f9ae2c | 1621 | r.varobj = *varp; |
f7f9ae2c | 1622 | r.type_changed = type_changed; |
fe978cb0 | 1623 | if (install_new_value ((*varp), newobj, type_changed)) |
f7f9ae2c | 1624 | r.changed = 1; |
ea56f9c2 | 1625 | |
fe978cb0 | 1626 | if (newobj == NULL) |
f7f9ae2c | 1627 | r.status = VAROBJ_NOT_IN_SCOPE; |
b6313243 | 1628 | r.value_installed = 1; |
f7f9ae2c VP |
1629 | |
1630 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
b6313243 | 1631 | { |
0b4bc29a JK |
1632 | if (r.type_changed || r.changed) |
1633 | VEC_safe_push (varobj_update_result, result, &r); | |
b6313243 TT |
1634 | return result; |
1635 | } | |
1636 | ||
1637 | VEC_safe_push (varobj_update_result, stack, &r); | |
1638 | } | |
1639 | else | |
1640 | { | |
cfce2ea2 | 1641 | varobj_update_result r = {0}; |
a109c7c1 | 1642 | |
cfce2ea2 | 1643 | r.varobj = *varp; |
b6313243 | 1644 | VEC_safe_push (varobj_update_result, stack, &r); |
b20d8971 | 1645 | } |
8b93c638 | 1646 | |
8756216b | 1647 | /* Walk through the children, reconstructing them all. */ |
b6313243 | 1648 | while (!VEC_empty (varobj_update_result, stack)) |
8b93c638 | 1649 | { |
b6313243 TT |
1650 | varobj_update_result r = *(VEC_last (varobj_update_result, stack)); |
1651 | struct varobj *v = r.varobj; | |
1652 | ||
1653 | VEC_pop (varobj_update_result, stack); | |
1654 | ||
1655 | /* Update this variable, unless it's a root, which is already | |
1656 | updated. */ | |
1657 | if (!r.value_installed) | |
7a290c40 JB |
1658 | { |
1659 | struct type *new_type; | |
1660 | ||
fe978cb0 PA |
1661 | newobj = value_of_child (v->parent, v->index); |
1662 | if (update_type_if_necessary(v, newobj)) | |
8264ba82 | 1663 | r.type_changed = 1; |
fe978cb0 PA |
1664 | if (newobj) |
1665 | new_type = value_type (newobj); | |
7a290c40 | 1666 | else |
ca20d462 | 1667 | new_type = v->root->lang_ops->type_of_child (v->parent, v->index); |
7a290c40 | 1668 | |
fe978cb0 | 1669 | if (varobj_value_has_mutated (v, newobj, new_type)) |
7a290c40 JB |
1670 | { |
1671 | /* The children are no longer valid; delete them now. | |
1672 | Report the fact that its type changed as well. */ | |
30914ca8 | 1673 | varobj_delete (v, 1 /* only_children */); |
7a290c40 JB |
1674 | v->num_children = -1; |
1675 | v->to = -1; | |
1676 | v->from = -1; | |
1677 | v->type = new_type; | |
1678 | r.type_changed = 1; | |
1679 | } | |
1680 | ||
fe978cb0 | 1681 | if (install_new_value (v, newobj, r.type_changed)) |
b6313243 TT |
1682 | { |
1683 | r.changed = 1; | |
1684 | v->updated = 0; | |
1685 | } | |
1686 | } | |
1687 | ||
31f628ae YQ |
1688 | /* We probably should not get children of a dynamic varobj, but |
1689 | for which -var-list-children was never invoked. */ | |
1690 | if (varobj_is_dynamic_p (v)) | |
b6313243 | 1691 | { |
8264ba82 | 1692 | VEC (varobj_p) *changed = 0, *type_changed = 0, *unchanged = 0; |
fe978cb0 | 1693 | VEC (varobj_p) *newobj = 0; |
26f9bcee | 1694 | int i, children_changed = 0; |
b6313243 TT |
1695 | |
1696 | if (v->frozen) | |
1697 | continue; | |
1698 | ||
bb5ce47a | 1699 | if (!v->dynamic->children_requested) |
0cc7d26f TT |
1700 | { |
1701 | int dummy; | |
1702 | ||
1703 | /* If we initially did not have potential children, but | |
1704 | now we do, consider the varobj as changed. | |
1705 | Otherwise, if children were never requested, consider | |
1706 | it as unchanged -- presumably, such varobj is not yet | |
1707 | expanded in the UI, so we need not bother getting | |
1708 | it. */ | |
1709 | if (!varobj_has_more (v, 0)) | |
1710 | { | |
8264ba82 | 1711 | update_dynamic_varobj_children (v, NULL, NULL, NULL, NULL, |
0cc7d26f TT |
1712 | &dummy, 0, 0, 0); |
1713 | if (varobj_has_more (v, 0)) | |
1714 | r.changed = 1; | |
1715 | } | |
1716 | ||
1717 | if (r.changed) | |
1718 | VEC_safe_push (varobj_update_result, result, &r); | |
1719 | ||
1720 | continue; | |
1721 | } | |
1722 | ||
b6313243 TT |
1723 | /* If update_dynamic_varobj_children returns 0, then we have |
1724 | a non-conforming pretty-printer, so we skip it. */ | |
fe978cb0 | 1725 | if (update_dynamic_varobj_children (v, &changed, &type_changed, &newobj, |
8264ba82 | 1726 | &unchanged, &children_changed, 1, |
0cc7d26f | 1727 | v->from, v->to)) |
b6313243 | 1728 | { |
fe978cb0 | 1729 | if (children_changed || newobj) |
b6313243 | 1730 | { |
0cc7d26f | 1731 | r.children_changed = 1; |
fe978cb0 | 1732 | r.newobj = newobj; |
b6313243 | 1733 | } |
0cc7d26f TT |
1734 | /* Push in reverse order so that the first child is |
1735 | popped from the work stack first, and so will be | |
1736 | added to result first. This does not affect | |
1737 | correctness, just "nicer". */ | |
8264ba82 AG |
1738 | for (i = VEC_length (varobj_p, type_changed) - 1; i >= 0; --i) |
1739 | { | |
1740 | varobj_p tmp = VEC_index (varobj_p, type_changed, i); | |
1741 | varobj_update_result r = {0}; | |
1742 | ||
1743 | /* Type may change only if value was changed. */ | |
1744 | r.varobj = tmp; | |
1745 | r.changed = 1; | |
1746 | r.type_changed = 1; | |
1747 | r.value_installed = 1; | |
1748 | VEC_safe_push (varobj_update_result, stack, &r); | |
1749 | } | |
0cc7d26f | 1750 | for (i = VEC_length (varobj_p, changed) - 1; i >= 0; --i) |
b6313243 | 1751 | { |
0cc7d26f | 1752 | varobj_p tmp = VEC_index (varobj_p, changed, i); |
cfce2ea2 | 1753 | varobj_update_result r = {0}; |
a109c7c1 | 1754 | |
cfce2ea2 | 1755 | r.varobj = tmp; |
0cc7d26f | 1756 | r.changed = 1; |
b6313243 TT |
1757 | r.value_installed = 1; |
1758 | VEC_safe_push (varobj_update_result, stack, &r); | |
1759 | } | |
0cc7d26f TT |
1760 | for (i = VEC_length (varobj_p, unchanged) - 1; i >= 0; --i) |
1761 | { | |
1762 | varobj_p tmp = VEC_index (varobj_p, unchanged, i); | |
a109c7c1 | 1763 | |
0cc7d26f TT |
1764 | if (!tmp->frozen) |
1765 | { | |
cfce2ea2 | 1766 | varobj_update_result r = {0}; |
a109c7c1 | 1767 | |
cfce2ea2 | 1768 | r.varobj = tmp; |
0cc7d26f TT |
1769 | r.value_installed = 1; |
1770 | VEC_safe_push (varobj_update_result, stack, &r); | |
1771 | } | |
1772 | } | |
b6313243 TT |
1773 | if (r.changed || r.children_changed) |
1774 | VEC_safe_push (varobj_update_result, result, &r); | |
0cc7d26f | 1775 | |
8264ba82 AG |
1776 | /* Free CHANGED, TYPE_CHANGED and UNCHANGED, but not NEW, |
1777 | because NEW has been put into the result vector. */ | |
0cc7d26f | 1778 | VEC_free (varobj_p, changed); |
8264ba82 | 1779 | VEC_free (varobj_p, type_changed); |
0cc7d26f TT |
1780 | VEC_free (varobj_p, unchanged); |
1781 | ||
b6313243 TT |
1782 | continue; |
1783 | } | |
1784 | } | |
28335dcc VP |
1785 | |
1786 | /* Push any children. Use reverse order so that the first | |
1787 | child is popped from the work stack first, and so | |
1788 | will be added to result first. This does not | |
1789 | affect correctness, just "nicer". */ | |
1790 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1791 | { |
28335dcc | 1792 | varobj_p c = VEC_index (varobj_p, v->children, i); |
a109c7c1 | 1793 | |
28335dcc | 1794 | /* Child may be NULL if explicitly deleted by -var-delete. */ |
25d5ea92 | 1795 | if (c != NULL && !c->frozen) |
28335dcc | 1796 | { |
cfce2ea2 | 1797 | varobj_update_result r = {0}; |
a109c7c1 | 1798 | |
cfce2ea2 | 1799 | r.varobj = c; |
b6313243 | 1800 | VEC_safe_push (varobj_update_result, stack, &r); |
28335dcc | 1801 | } |
8b93c638 | 1802 | } |
b6313243 TT |
1803 | |
1804 | if (r.changed || r.type_changed) | |
1805 | VEC_safe_push (varobj_update_result, result, &r); | |
8b93c638 JM |
1806 | } |
1807 | ||
b6313243 TT |
1808 | VEC_free (varobj_update_result, stack); |
1809 | ||
f7f9ae2c | 1810 | return result; |
8b93c638 JM |
1811 | } |
1812 | \f | |
1813 | ||
1814 | /* Helper functions */ | |
1815 | ||
1816 | /* | |
1817 | * Variable object construction/destruction | |
1818 | */ | |
1819 | ||
1820 | static int | |
30914ca8 | 1821 | delete_variable (struct varobj *var, int only_children_p) |
8b93c638 JM |
1822 | { |
1823 | int delcount = 0; | |
1824 | ||
30914ca8 SM |
1825 | delete_variable_1 (&delcount, var, only_children_p, |
1826 | 1 /* remove_from_parent_p */ ); | |
8b93c638 JM |
1827 | |
1828 | return delcount; | |
1829 | } | |
1830 | ||
581e13c1 | 1831 | /* Delete the variable object VAR and its children. */ |
8b93c638 JM |
1832 | /* IMPORTANT NOTE: If we delete a variable which is a child |
1833 | and the parent is not removed we dump core. It must be always | |
581e13c1 | 1834 | initially called with remove_from_parent_p set. */ |
8b93c638 | 1835 | static void |
30914ca8 | 1836 | delete_variable_1 (int *delcountp, struct varobj *var, int only_children_p, |
72330bd6 | 1837 | int remove_from_parent_p) |
8b93c638 | 1838 | { |
28335dcc | 1839 | int i; |
8b93c638 | 1840 | |
581e13c1 | 1841 | /* Delete any children of this variable, too. */ |
28335dcc VP |
1842 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1843 | { | |
1844 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
a109c7c1 | 1845 | |
214270ab VP |
1846 | if (!child) |
1847 | continue; | |
8b93c638 | 1848 | if (!remove_from_parent_p) |
28335dcc | 1849 | child->parent = NULL; |
30914ca8 | 1850 | delete_variable_1 (delcountp, child, 0, only_children_p); |
8b93c638 | 1851 | } |
28335dcc | 1852 | VEC_free (varobj_p, var->children); |
8b93c638 | 1853 | |
581e13c1 | 1854 | /* if we were called to delete only the children we are done here. */ |
8b93c638 JM |
1855 | if (only_children_p) |
1856 | return; | |
1857 | ||
581e13c1 | 1858 | /* Otherwise, add it to the list of deleted ones and proceed to do so. */ |
73a93a32 | 1859 | /* If the name is null, this is a temporary variable, that has not |
581e13c1 | 1860 | yet been installed, don't report it, it belongs to the caller... */ |
73a93a32 | 1861 | if (var->obj_name != NULL) |
8b93c638 | 1862 | { |
8b93c638 JM |
1863 | *delcountp = *delcountp + 1; |
1864 | } | |
1865 | ||
581e13c1 | 1866 | /* If this variable has a parent, remove it from its parent's list. */ |
8b93c638 JM |
1867 | /* OPTIMIZATION: if the parent of this variable is also being deleted, |
1868 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1869 | expensive list search to find the element to remove when we are | |
581e13c1 | 1870 | discarding the list afterwards. */ |
72330bd6 | 1871 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1872 | { |
28335dcc | 1873 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1874 | } |
72330bd6 | 1875 | |
73a93a32 JI |
1876 | if (var->obj_name != NULL) |
1877 | uninstall_variable (var); | |
8b93c638 | 1878 | |
581e13c1 | 1879 | /* Free memory associated with this variable. */ |
8b93c638 JM |
1880 | free_variable (var); |
1881 | } | |
1882 | ||
581e13c1 | 1883 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ |
8b93c638 | 1884 | static int |
fba45db2 | 1885 | install_variable (struct varobj *var) |
8b93c638 JM |
1886 | { |
1887 | struct vlist *cv; | |
1888 | struct vlist *newvl; | |
1889 | const char *chp; | |
1890 | unsigned int index = 0; | |
1891 | unsigned int i = 1; | |
1892 | ||
1893 | for (chp = var->obj_name; *chp; chp++) | |
1894 | { | |
1895 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1896 | } | |
1897 | ||
1898 | cv = *(varobj_table + index); | |
1899 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1900 | cv = cv->next; | |
1901 | ||
1902 | if (cv != NULL) | |
8a3fe4f8 | 1903 | error (_("Duplicate variable object name")); |
8b93c638 | 1904 | |
581e13c1 | 1905 | /* Add varobj to hash table. */ |
8d749320 | 1906 | newvl = XNEW (struct vlist); |
8b93c638 JM |
1907 | newvl->next = *(varobj_table + index); |
1908 | newvl->var = var; | |
1909 | *(varobj_table + index) = newvl; | |
1910 | ||
581e13c1 | 1911 | /* If root, add varobj to root list. */ |
b2c2bd75 | 1912 | if (is_root_p (var)) |
8b93c638 | 1913 | { |
581e13c1 | 1914 | /* Add to list of root variables. */ |
8b93c638 JM |
1915 | if (rootlist == NULL) |
1916 | var->root->next = NULL; | |
1917 | else | |
1918 | var->root->next = rootlist; | |
1919 | rootlist = var->root; | |
8b93c638 JM |
1920 | } |
1921 | ||
1922 | return 1; /* OK */ | |
1923 | } | |
1924 | ||
581e13c1 | 1925 | /* Unistall the object VAR. */ |
8b93c638 | 1926 | static void |
fba45db2 | 1927 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1928 | { |
1929 | struct vlist *cv; | |
1930 | struct vlist *prev; | |
1931 | struct varobj_root *cr; | |
1932 | struct varobj_root *prer; | |
1933 | const char *chp; | |
1934 | unsigned int index = 0; | |
1935 | unsigned int i = 1; | |
1936 | ||
581e13c1 | 1937 | /* Remove varobj from hash table. */ |
8b93c638 JM |
1938 | for (chp = var->obj_name; *chp; chp++) |
1939 | { | |
1940 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1941 | } | |
1942 | ||
1943 | cv = *(varobj_table + index); | |
1944 | prev = NULL; | |
1945 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1946 | { | |
1947 | prev = cv; | |
1948 | cv = cv->next; | |
1949 | } | |
1950 | ||
1951 | if (varobjdebug) | |
1952 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1953 | ||
1954 | if (cv == NULL) | |
1955 | { | |
72330bd6 AC |
1956 | warning |
1957 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1958 | var->obj_name); | |
8b93c638 JM |
1959 | return; |
1960 | } | |
1961 | ||
1962 | if (prev == NULL) | |
1963 | *(varobj_table + index) = cv->next; | |
1964 | else | |
1965 | prev->next = cv->next; | |
1966 | ||
b8c9b27d | 1967 | xfree (cv); |
8b93c638 | 1968 | |
581e13c1 | 1969 | /* If root, remove varobj from root list. */ |
b2c2bd75 | 1970 | if (is_root_p (var)) |
8b93c638 | 1971 | { |
581e13c1 | 1972 | /* Remove from list of root variables. */ |
8b93c638 JM |
1973 | if (rootlist == var->root) |
1974 | rootlist = var->root->next; | |
1975 | else | |
1976 | { | |
1977 | prer = NULL; | |
1978 | cr = rootlist; | |
1979 | while ((cr != NULL) && (cr->rootvar != var)) | |
1980 | { | |
1981 | prer = cr; | |
1982 | cr = cr->next; | |
1983 | } | |
1984 | if (cr == NULL) | |
1985 | { | |
8f7e195f JB |
1986 | warning (_("Assertion failed: Could not find " |
1987 | "varobj \"%s\" in root list"), | |
3e43a32a | 1988 | var->obj_name); |
8b93c638 JM |
1989 | return; |
1990 | } | |
1991 | if (prer == NULL) | |
1992 | rootlist = NULL; | |
1993 | else | |
1994 | prer->next = cr->next; | |
1995 | } | |
8b93c638 JM |
1996 | } |
1997 | ||
1998 | } | |
1999 | ||
837ce252 SM |
2000 | /* Create and install a child of the parent of the given name. |
2001 | ||
2002 | The created VAROBJ takes ownership of the allocated NAME. */ | |
2003 | ||
8b93c638 | 2004 | static struct varobj * |
fba45db2 | 2005 | create_child (struct varobj *parent, int index, char *name) |
b6313243 | 2006 | { |
5a2e0d6e YQ |
2007 | struct varobj_item item; |
2008 | ||
2009 | item.name = name; | |
2010 | item.value = value_of_child (parent, index); | |
2011 | ||
2012 | return create_child_with_value (parent, index, &item); | |
b6313243 TT |
2013 | } |
2014 | ||
2015 | static struct varobj * | |
5a2e0d6e YQ |
2016 | create_child_with_value (struct varobj *parent, int index, |
2017 | struct varobj_item *item) | |
8b93c638 JM |
2018 | { |
2019 | struct varobj *child; | |
2020 | char *childs_name; | |
2021 | ||
2022 | child = new_variable (); | |
2023 | ||
5e5ac9a5 | 2024 | /* NAME is allocated by caller. */ |
5a2e0d6e | 2025 | child->name = item->name; |
8b93c638 | 2026 | child->index = index; |
8b93c638 JM |
2027 | child->parent = parent; |
2028 | child->root = parent->root; | |
85254831 | 2029 | |
99ad9427 | 2030 | if (varobj_is_anonymous_child (child)) |
85254831 KS |
2031 | childs_name = xstrprintf ("%s.%d_anonymous", parent->obj_name, index); |
2032 | else | |
5a2e0d6e | 2033 | childs_name = xstrprintf ("%s.%s", parent->obj_name, item->name); |
8b93c638 | 2034 | child->obj_name = childs_name; |
85254831 | 2035 | |
8b93c638 JM |
2036 | install_variable (child); |
2037 | ||
acd65feb VP |
2038 | /* Compute the type of the child. Must do this before |
2039 | calling install_new_value. */ | |
5a2e0d6e | 2040 | if (item->value != NULL) |
acd65feb | 2041 | /* If the child had no evaluation errors, var->value |
581e13c1 | 2042 | will be non-NULL and contain a valid type. */ |
5a2e0d6e | 2043 | child->type = value_actual_type (item->value, 0, NULL); |
acd65feb | 2044 | else |
581e13c1 | 2045 | /* Otherwise, we must compute the type. */ |
ca20d462 YQ |
2046 | child->type = (*child->root->lang_ops->type_of_child) (child->parent, |
2047 | child->index); | |
5a2e0d6e | 2048 | install_new_value (child, item->value, 1); |
acd65feb | 2049 | |
8b93c638 JM |
2050 | return child; |
2051 | } | |
8b93c638 JM |
2052 | \f |
2053 | ||
2054 | /* | |
2055 | * Miscellaneous utility functions. | |
2056 | */ | |
2057 | ||
581e13c1 | 2058 | /* Allocate memory and initialize a new variable. */ |
8b93c638 JM |
2059 | static struct varobj * |
2060 | new_variable (void) | |
2061 | { | |
2062 | struct varobj *var; | |
2063 | ||
8d749320 | 2064 | var = XNEW (struct varobj); |
8b93c638 | 2065 | var->name = NULL; |
02142340 | 2066 | var->path_expr = NULL; |
8b93c638 JM |
2067 | var->obj_name = NULL; |
2068 | var->index = -1; | |
2069 | var->type = NULL; | |
2070 | var->value = NULL; | |
8b93c638 JM |
2071 | var->num_children = -1; |
2072 | var->parent = NULL; | |
2073 | var->children = NULL; | |
f486487f | 2074 | var->format = FORMAT_NATURAL; |
8b93c638 | 2075 | var->root = NULL; |
fb9b6b35 | 2076 | var->updated = 0; |
85265413 | 2077 | var->print_value = NULL; |
25d5ea92 VP |
2078 | var->frozen = 0; |
2079 | var->not_fetched = 0; | |
8d749320 | 2080 | var->dynamic = XNEW (struct varobj_dynamic); |
bb5ce47a | 2081 | var->dynamic->children_requested = 0; |
0cc7d26f TT |
2082 | var->from = -1; |
2083 | var->to = -1; | |
bb5ce47a YQ |
2084 | var->dynamic->constructor = 0; |
2085 | var->dynamic->pretty_printer = 0; | |
2086 | var->dynamic->child_iter = 0; | |
2087 | var->dynamic->saved_item = 0; | |
8b93c638 JM |
2088 | |
2089 | return var; | |
2090 | } | |
2091 | ||
581e13c1 | 2092 | /* Allocate memory and initialize a new root variable. */ |
8b93c638 JM |
2093 | static struct varobj * |
2094 | new_root_variable (void) | |
2095 | { | |
2096 | struct varobj *var = new_variable (); | |
a109c7c1 | 2097 | |
8d749320 | 2098 | var->root = XNEW (struct varobj_root); |
ca20d462 | 2099 | var->root->lang_ops = NULL; |
8b93c638 JM |
2100 | var->root->exp = NULL; |
2101 | var->root->valid_block = NULL; | |
7a424e99 | 2102 | var->root->frame = null_frame_id; |
a5defcdc | 2103 | var->root->floating = 0; |
8b93c638 | 2104 | var->root->rootvar = NULL; |
8756216b | 2105 | var->root->is_valid = 1; |
8b93c638 JM |
2106 | |
2107 | return var; | |
2108 | } | |
2109 | ||
581e13c1 | 2110 | /* Free any allocated memory associated with VAR. */ |
8b93c638 | 2111 | static void |
fba45db2 | 2112 | free_variable (struct varobj *var) |
8b93c638 | 2113 | { |
d452c4bc | 2114 | #if HAVE_PYTHON |
bb5ce47a | 2115 | if (var->dynamic->pretty_printer != NULL) |
d452c4bc UW |
2116 | { |
2117 | struct cleanup *cleanup = varobj_ensure_python_env (var); | |
bb5ce47a YQ |
2118 | |
2119 | Py_XDECREF (var->dynamic->constructor); | |
2120 | Py_XDECREF (var->dynamic->pretty_printer); | |
d452c4bc UW |
2121 | do_cleanups (cleanup); |
2122 | } | |
2123 | #endif | |
2124 | ||
827f100c YQ |
2125 | varobj_iter_delete (var->dynamic->child_iter); |
2126 | varobj_clear_saved_item (var->dynamic); | |
36746093 JK |
2127 | value_free (var->value); |
2128 | ||
581e13c1 | 2129 | /* Free the expression if this is a root variable. */ |
b2c2bd75 | 2130 | if (is_root_p (var)) |
8b93c638 | 2131 | { |
3038237c | 2132 | xfree (var->root->exp); |
8038e1e2 | 2133 | xfree (var->root); |
8b93c638 JM |
2134 | } |
2135 | ||
8038e1e2 AC |
2136 | xfree (var->name); |
2137 | xfree (var->obj_name); | |
85265413 | 2138 | xfree (var->print_value); |
02142340 | 2139 | xfree (var->path_expr); |
bb5ce47a | 2140 | xfree (var->dynamic); |
8038e1e2 | 2141 | xfree (var); |
8b93c638 JM |
2142 | } |
2143 | ||
74b7792f AC |
2144 | static void |
2145 | do_free_variable_cleanup (void *var) | |
2146 | { | |
19ba03f4 | 2147 | free_variable ((struct varobj *) var); |
74b7792f AC |
2148 | } |
2149 | ||
2150 | static struct cleanup * | |
2151 | make_cleanup_free_variable (struct varobj *var) | |
2152 | { | |
2153 | return make_cleanup (do_free_variable_cleanup, var); | |
2154 | } | |
2155 | ||
6e2a9270 VP |
2156 | /* Return the type of the value that's stored in VAR, |
2157 | or that would have being stored there if the | |
581e13c1 | 2158 | value were accessible. |
6e2a9270 VP |
2159 | |
2160 | This differs from VAR->type in that VAR->type is always | |
2161 | the true type of the expession in the source language. | |
2162 | The return value of this function is the type we're | |
2163 | actually storing in varobj, and using for displaying | |
2164 | the values and for comparing previous and new values. | |
2165 | ||
2166 | For example, top-level references are always stripped. */ | |
99ad9427 | 2167 | struct type * |
b09e2c59 | 2168 | varobj_get_value_type (const struct varobj *var) |
6e2a9270 VP |
2169 | { |
2170 | struct type *type; | |
2171 | ||
2172 | if (var->value) | |
2173 | type = value_type (var->value); | |
2174 | else | |
2175 | type = var->type; | |
2176 | ||
2177 | type = check_typedef (type); | |
2178 | ||
2179 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
2180 | type = get_target_type (type); | |
2181 | ||
2182 | type = check_typedef (type); | |
2183 | ||
2184 | return type; | |
2185 | } | |
2186 | ||
8b93c638 | 2187 | /* What is the default display for this variable? We assume that |
581e13c1 | 2188 | everything is "natural". Any exceptions? */ |
8b93c638 | 2189 | static enum varobj_display_formats |
fba45db2 | 2190 | variable_default_display (struct varobj *var) |
8b93c638 JM |
2191 | { |
2192 | return FORMAT_NATURAL; | |
2193 | } | |
2194 | ||
8b93c638 JM |
2195 | /* |
2196 | * Language-dependencies | |
2197 | */ | |
2198 | ||
2199 | /* Common entry points */ | |
2200 | ||
8b93c638 JM |
2201 | /* Return the number of children for a given variable. |
2202 | The result of this function is defined by the language | |
581e13c1 | 2203 | implementation. The number of children returned by this function |
8b93c638 | 2204 | is the number of children that the user will see in the variable |
581e13c1 | 2205 | display. */ |
8b93c638 | 2206 | static int |
b09e2c59 | 2207 | number_of_children (const struct varobj *var) |
8b93c638 | 2208 | { |
ca20d462 | 2209 | return (*var->root->lang_ops->number_of_children) (var); |
8b93c638 JM |
2210 | } |
2211 | ||
3e43a32a | 2212 | /* What is the expression for the root varobj VAR? Returns a malloc'd |
581e13c1 | 2213 | string. */ |
8b93c638 | 2214 | static char * |
b09e2c59 | 2215 | name_of_variable (const struct varobj *var) |
8b93c638 | 2216 | { |
ca20d462 | 2217 | return (*var->root->lang_ops->name_of_variable) (var); |
8b93c638 JM |
2218 | } |
2219 | ||
3e43a32a | 2220 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd |
581e13c1 | 2221 | string. */ |
8b93c638 | 2222 | static char * |
fba45db2 | 2223 | name_of_child (struct varobj *var, int index) |
8b93c638 | 2224 | { |
ca20d462 | 2225 | return (*var->root->lang_ops->name_of_child) (var, index); |
8b93c638 JM |
2226 | } |
2227 | ||
2213e2be YQ |
2228 | /* If frame associated with VAR can be found, switch |
2229 | to it and return 1. Otherwise, return 0. */ | |
2230 | ||
2231 | static int | |
b09e2c59 | 2232 | check_scope (const struct varobj *var) |
2213e2be YQ |
2233 | { |
2234 | struct frame_info *fi; | |
2235 | int scope; | |
2236 | ||
2237 | fi = frame_find_by_id (var->root->frame); | |
2238 | scope = fi != NULL; | |
2239 | ||
2240 | if (fi) | |
2241 | { | |
2242 | CORE_ADDR pc = get_frame_pc (fi); | |
2243 | ||
2244 | if (pc < BLOCK_START (var->root->valid_block) || | |
2245 | pc >= BLOCK_END (var->root->valid_block)) | |
2246 | scope = 0; | |
2247 | else | |
2248 | select_frame (fi); | |
2249 | } | |
2250 | return scope; | |
2251 | } | |
2252 | ||
2253 | /* Helper function to value_of_root. */ | |
2254 | ||
2255 | static struct value * | |
2256 | value_of_root_1 (struct varobj **var_handle) | |
2257 | { | |
2258 | struct value *new_val = NULL; | |
2259 | struct varobj *var = *var_handle; | |
2260 | int within_scope = 0; | |
2261 | struct cleanup *back_to; | |
2262 | ||
2263 | /* Only root variables can be updated... */ | |
2264 | if (!is_root_p (var)) | |
2265 | /* Not a root var. */ | |
2266 | return NULL; | |
2267 | ||
2268 | back_to = make_cleanup_restore_current_thread (); | |
2269 | ||
2270 | /* Determine whether the variable is still around. */ | |
2271 | if (var->root->valid_block == NULL || var->root->floating) | |
2272 | within_scope = 1; | |
2273 | else if (var->root->thread_id == 0) | |
2274 | { | |
2275 | /* The program was single-threaded when the variable object was | |
2276 | created. Technically, it's possible that the program became | |
2277 | multi-threaded since then, but we don't support such | |
2278 | scenario yet. */ | |
2279 | within_scope = check_scope (var); | |
2280 | } | |
2281 | else | |
2282 | { | |
5d5658a1 PA |
2283 | ptid_t ptid = global_thread_id_to_ptid (var->root->thread_id); |
2284 | ||
2285 | if (!ptid_equal (minus_one_ptid, ptid)) | |
2213e2be YQ |
2286 | { |
2287 | switch_to_thread (ptid); | |
2288 | within_scope = check_scope (var); | |
2289 | } | |
2290 | } | |
2291 | ||
2292 | if (within_scope) | |
2293 | { | |
2213e2be YQ |
2294 | |
2295 | /* We need to catch errors here, because if evaluate | |
2296 | expression fails we want to just return NULL. */ | |
492d29ea | 2297 | TRY |
2213e2be YQ |
2298 | { |
2299 | new_val = evaluate_expression (var->root->exp); | |
2300 | } | |
492d29ea PA |
2301 | CATCH (except, RETURN_MASK_ERROR) |
2302 | { | |
2303 | } | |
2304 | END_CATCH | |
2213e2be YQ |
2305 | } |
2306 | ||
2307 | do_cleanups (back_to); | |
2308 | ||
2309 | return new_val; | |
2310 | } | |
2311 | ||
a5defcdc VP |
2312 | /* What is the ``struct value *'' of the root variable VAR? |
2313 | For floating variable object, evaluation can get us a value | |
2314 | of different type from what is stored in varobj already. In | |
2315 | that case: | |
2316 | - *type_changed will be set to 1 | |
2317 | - old varobj will be freed, and new one will be | |
2318 | created, with the same name. | |
2319 | - *var_handle will be set to the new varobj | |
2320 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 2321 | static struct value * |
fba45db2 | 2322 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 2323 | { |
73a93a32 JI |
2324 | struct varobj *var; |
2325 | ||
2326 | if (var_handle == NULL) | |
2327 | return NULL; | |
2328 | ||
2329 | var = *var_handle; | |
2330 | ||
2331 | /* This should really be an exception, since this should | |
581e13c1 | 2332 | only get called with a root variable. */ |
73a93a32 | 2333 | |
b2c2bd75 | 2334 | if (!is_root_p (var)) |
73a93a32 JI |
2335 | return NULL; |
2336 | ||
a5defcdc | 2337 | if (var->root->floating) |
73a93a32 JI |
2338 | { |
2339 | struct varobj *tmp_var; | |
2340 | char *old_type, *new_type; | |
6225abfa | 2341 | |
73a93a32 JI |
2342 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
2343 | USE_SELECTED_FRAME); | |
2344 | if (tmp_var == NULL) | |
2345 | { | |
2346 | return NULL; | |
2347 | } | |
6225abfa | 2348 | old_type = varobj_get_type (var); |
73a93a32 | 2349 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 2350 | if (strcmp (old_type, new_type) == 0) |
73a93a32 | 2351 | { |
fcacd99f VP |
2352 | /* The expression presently stored inside var->root->exp |
2353 | remembers the locations of local variables relatively to | |
2354 | the frame where the expression was created (in DWARF location | |
2355 | button, for example). Naturally, those locations are not | |
2356 | correct in other frames, so update the expression. */ | |
2357 | ||
2358 | struct expression *tmp_exp = var->root->exp; | |
a109c7c1 | 2359 | |
fcacd99f VP |
2360 | var->root->exp = tmp_var->root->exp; |
2361 | tmp_var->root->exp = tmp_exp; | |
2362 | ||
30914ca8 | 2363 | varobj_delete (tmp_var, 0); |
73a93a32 JI |
2364 | *type_changed = 0; |
2365 | } | |
2366 | else | |
2367 | { | |
1b36a34b | 2368 | tmp_var->obj_name = xstrdup (var->obj_name); |
0cc7d26f TT |
2369 | tmp_var->from = var->from; |
2370 | tmp_var->to = var->to; | |
30914ca8 | 2371 | varobj_delete (var, 0); |
a5defcdc | 2372 | |
73a93a32 JI |
2373 | install_variable (tmp_var); |
2374 | *var_handle = tmp_var; | |
705da579 | 2375 | var = *var_handle; |
73a93a32 JI |
2376 | *type_changed = 1; |
2377 | } | |
74dddad3 MS |
2378 | xfree (old_type); |
2379 | xfree (new_type); | |
73a93a32 JI |
2380 | } |
2381 | else | |
2382 | { | |
2383 | *type_changed = 0; | |
2384 | } | |
2385 | ||
7a290c40 JB |
2386 | { |
2387 | struct value *value; | |
2388 | ||
2213e2be | 2389 | value = value_of_root_1 (var_handle); |
7a290c40 JB |
2390 | if (var->value == NULL || value == NULL) |
2391 | { | |
2392 | /* For root varobj-s, a NULL value indicates a scoping issue. | |
2393 | So, nothing to do in terms of checking for mutations. */ | |
2394 | } | |
2395 | else if (varobj_value_has_mutated (var, value, value_type (value))) | |
2396 | { | |
2397 | /* The type has mutated, so the children are no longer valid. | |
2398 | Just delete them, and tell our caller that the type has | |
2399 | changed. */ | |
30914ca8 | 2400 | varobj_delete (var, 1 /* only_children */); |
7a290c40 JB |
2401 | var->num_children = -1; |
2402 | var->to = -1; | |
2403 | var->from = -1; | |
2404 | *type_changed = 1; | |
2405 | } | |
2406 | return value; | |
2407 | } | |
8b93c638 JM |
2408 | } |
2409 | ||
581e13c1 | 2410 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
30b28db1 | 2411 | static struct value * |
c1cc6152 | 2412 | value_of_child (const struct varobj *parent, int index) |
8b93c638 | 2413 | { |
30b28db1 | 2414 | struct value *value; |
8b93c638 | 2415 | |
ca20d462 | 2416 | value = (*parent->root->lang_ops->value_of_child) (parent, index); |
8b93c638 | 2417 | |
8b93c638 JM |
2418 | return value; |
2419 | } | |
2420 | ||
581e13c1 | 2421 | /* GDB already has a command called "value_of_variable". Sigh. */ |
8b93c638 | 2422 | static char * |
de051565 | 2423 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2424 | { |
8756216b | 2425 | if (var->root->is_valid) |
0cc7d26f | 2426 | { |
bb5ce47a | 2427 | if (var->dynamic->pretty_printer != NULL) |
99ad9427 | 2428 | return varobj_value_get_print_value (var->value, var->format, var); |
ca20d462 | 2429 | return (*var->root->lang_ops->value_of_variable) (var, format); |
0cc7d26f | 2430 | } |
8756216b DP |
2431 | else |
2432 | return NULL; | |
8b93c638 JM |
2433 | } |
2434 | ||
99ad9427 YQ |
2435 | void |
2436 | varobj_formatted_print_options (struct value_print_options *opts, | |
2437 | enum varobj_display_formats format) | |
2438 | { | |
2439 | get_formatted_print_options (opts, format_code[(int) format]); | |
2440 | opts->deref_ref = 0; | |
2441 | opts->raw = 1; | |
2442 | } | |
2443 | ||
2444 | char * | |
2445 | varobj_value_get_print_value (struct value *value, | |
2446 | enum varobj_display_formats format, | |
b09e2c59 | 2447 | const struct varobj *var) |
85265413 | 2448 | { |
57e66780 | 2449 | struct ui_file *stb; |
621c8364 | 2450 | struct cleanup *old_chain; |
ac91cd70 | 2451 | char *thevalue = NULL; |
79a45b7d | 2452 | struct value_print_options opts; |
be759fcf PM |
2453 | struct type *type = NULL; |
2454 | long len = 0; | |
2455 | char *encoding = NULL; | |
2456 | struct gdbarch *gdbarch = NULL; | |
3a182a69 JK |
2457 | /* Initialize it just to avoid a GCC false warning. */ |
2458 | CORE_ADDR str_addr = 0; | |
09ca9e2e | 2459 | int string_print = 0; |
57e66780 DJ |
2460 | |
2461 | if (value == NULL) | |
2462 | return NULL; | |
2463 | ||
621c8364 TT |
2464 | stb = mem_fileopen (); |
2465 | old_chain = make_cleanup_ui_file_delete (stb); | |
2466 | ||
be759fcf | 2467 | gdbarch = get_type_arch (value_type (value)); |
b6313243 | 2468 | #if HAVE_PYTHON |
0646da15 TT |
2469 | if (gdb_python_initialized) |
2470 | { | |
bb5ce47a | 2471 | PyObject *value_formatter = var->dynamic->pretty_printer; |
d452c4bc | 2472 | |
0646da15 | 2473 | varobj_ensure_python_env (var); |
09ca9e2e | 2474 | |
0646da15 TT |
2475 | if (value_formatter) |
2476 | { | |
2477 | /* First check to see if we have any children at all. If so, | |
2478 | we simply return {...}. */ | |
2479 | if (dynamic_varobj_has_child_method (var)) | |
2480 | { | |
2481 | do_cleanups (old_chain); | |
2482 | return xstrdup ("{...}"); | |
2483 | } | |
b6313243 | 2484 | |
0646da15 TT |
2485 | if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst)) |
2486 | { | |
2487 | struct value *replacement; | |
2488 | PyObject *output = NULL; | |
2489 | ||
2490 | output = apply_varobj_pretty_printer (value_formatter, | |
2491 | &replacement, | |
2492 | stb); | |
2493 | ||
2494 | /* If we have string like output ... */ | |
2495 | if (output) | |
2496 | { | |
2497 | make_cleanup_py_decref (output); | |
2498 | ||
2499 | /* If this is a lazy string, extract it. For lazy | |
2500 | strings we always print as a string, so set | |
2501 | string_print. */ | |
2502 | if (gdbpy_is_lazy_string (output)) | |
2503 | { | |
2504 | gdbpy_extract_lazy_string (output, &str_addr, &type, | |
2505 | &len, &encoding); | |
2506 | make_cleanup (free_current_contents, &encoding); | |
2507 | string_print = 1; | |
2508 | } | |
2509 | else | |
2510 | { | |
2511 | /* If it is a regular (non-lazy) string, extract | |
2512 | it and copy the contents into THEVALUE. If the | |
2513 | hint says to print it as a string, set | |
2514 | string_print. Otherwise just return the extracted | |
2515 | string as a value. */ | |
2516 | ||
2517 | char *s = python_string_to_target_string (output); | |
2518 | ||
2519 | if (s) | |
2520 | { | |
2521 | char *hint; | |
2522 | ||
2523 | hint = gdbpy_get_display_hint (value_formatter); | |
2524 | if (hint) | |
2525 | { | |
2526 | if (!strcmp (hint, "string")) | |
2527 | string_print = 1; | |
2528 | xfree (hint); | |
2529 | } | |
2530 | ||
2531 | len = strlen (s); | |
224c3ddb | 2532 | thevalue = (char *) xmemdup (s, len + 1, len + 1); |
0646da15 TT |
2533 | type = builtin_type (gdbarch)->builtin_char; |
2534 | xfree (s); | |
2535 | ||
2536 | if (!string_print) | |
2537 | { | |
2538 | do_cleanups (old_chain); | |
2539 | return thevalue; | |
2540 | } | |
2541 | ||
2542 | make_cleanup (xfree, thevalue); | |
2543 | } | |
2544 | else | |
2545 | gdbpy_print_stack (); | |
2546 | } | |
2547 | } | |
2548 | /* If the printer returned a replacement value, set VALUE | |
2549 | to REPLACEMENT. If there is not a replacement value, | |
2550 | just use the value passed to this function. */ | |
2551 | if (replacement) | |
2552 | value = replacement; | |
2553 | } | |
2554 | } | |
2555 | } | |
b6313243 TT |
2556 | #endif |
2557 | ||
99ad9427 | 2558 | varobj_formatted_print_options (&opts, format); |
00bd41d6 PM |
2559 | |
2560 | /* If the THEVALUE has contents, it is a regular string. */ | |
b6313243 | 2561 | if (thevalue) |
ac91cd70 | 2562 | LA_PRINT_STRING (stb, type, (gdb_byte *) thevalue, len, encoding, 0, &opts); |
09ca9e2e | 2563 | else if (string_print) |
00bd41d6 PM |
2564 | /* Otherwise, if string_print is set, and it is not a regular |
2565 | string, it is a lazy string. */ | |
09ca9e2e | 2566 | val_print_string (type, encoding, str_addr, len, stb, &opts); |
b6313243 | 2567 | else |
00bd41d6 | 2568 | /* All other cases. */ |
b6313243 | 2569 | common_val_print (value, stb, 0, &opts, current_language); |
00bd41d6 | 2570 | |
759ef836 | 2571 | thevalue = ui_file_xstrdup (stb, NULL); |
57e66780 | 2572 | |
85265413 NR |
2573 | do_cleanups (old_chain); |
2574 | return thevalue; | |
2575 | } | |
2576 | ||
340a7723 | 2577 | int |
b09e2c59 | 2578 | varobj_editable_p (const struct varobj *var) |
340a7723 NR |
2579 | { |
2580 | struct type *type; | |
340a7723 NR |
2581 | |
2582 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
2583 | return 0; | |
2584 | ||
99ad9427 | 2585 | type = varobj_get_value_type (var); |
340a7723 NR |
2586 | |
2587 | switch (TYPE_CODE (type)) | |
2588 | { | |
2589 | case TYPE_CODE_STRUCT: | |
2590 | case TYPE_CODE_UNION: | |
2591 | case TYPE_CODE_ARRAY: | |
2592 | case TYPE_CODE_FUNC: | |
2593 | case TYPE_CODE_METHOD: | |
2594 | return 0; | |
2595 | break; | |
2596 | ||
2597 | default: | |
2598 | return 1; | |
2599 | break; | |
2600 | } | |
2601 | } | |
2602 | ||
d32cafc7 | 2603 | /* Call VAR's value_is_changeable_p language-specific callback. */ |
acd65feb | 2604 | |
99ad9427 | 2605 | int |
b09e2c59 | 2606 | varobj_value_is_changeable_p (const struct varobj *var) |
8b93c638 | 2607 | { |
ca20d462 | 2608 | return var->root->lang_ops->value_is_changeable_p (var); |
8b93c638 JM |
2609 | } |
2610 | ||
5a413362 VP |
2611 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
2612 | selected frame, and not bound to thread/frame. Such variable objects | |
2613 | are created using '@' as frame specifier to -var-create. */ | |
2614 | int | |
b09e2c59 | 2615 | varobj_floating_p (const struct varobj *var) |
5a413362 VP |
2616 | { |
2617 | return var->root->floating; | |
2618 | } | |
2619 | ||
d32cafc7 JB |
2620 | /* Implement the "value_is_changeable_p" varobj callback for most |
2621 | languages. */ | |
2622 | ||
99ad9427 | 2623 | int |
b09e2c59 | 2624 | varobj_default_value_is_changeable_p (const struct varobj *var) |
d32cafc7 JB |
2625 | { |
2626 | int r; | |
2627 | struct type *type; | |
2628 | ||
2629 | if (CPLUS_FAKE_CHILD (var)) | |
2630 | return 0; | |
2631 | ||
99ad9427 | 2632 | type = varobj_get_value_type (var); |
d32cafc7 JB |
2633 | |
2634 | switch (TYPE_CODE (type)) | |
2635 | { | |
2636 | case TYPE_CODE_STRUCT: | |
2637 | case TYPE_CODE_UNION: | |
2638 | case TYPE_CODE_ARRAY: | |
2639 | r = 0; | |
2640 | break; | |
2641 | ||
2642 | default: | |
2643 | r = 1; | |
2644 | } | |
2645 | ||
2646 | return r; | |
2647 | } | |
2648 | ||
54333c3b JK |
2649 | /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them |
2650 | with an arbitrary caller supplied DATA pointer. */ | |
2651 | ||
2652 | void | |
2653 | all_root_varobjs (void (*func) (struct varobj *var, void *data), void *data) | |
2654 | { | |
2655 | struct varobj_root *var_root, *var_root_next; | |
2656 | ||
2657 | /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */ | |
2658 | ||
2659 | for (var_root = rootlist; var_root != NULL; var_root = var_root_next) | |
2660 | { | |
2661 | var_root_next = var_root->next; | |
2662 | ||
2663 | (*func) (var_root->rootvar, data); | |
2664 | } | |
2665 | } | |
8756216b | 2666 | |
54333c3b | 2667 | /* Invalidate varobj VAR if it is tied to locals and re-create it if it is |
4e969b4f AB |
2668 | defined on globals. It is a helper for varobj_invalidate. |
2669 | ||
2670 | This function is called after changing the symbol file, in this case the | |
2671 | pointers to "struct type" stored by the varobj are no longer valid. All | |
2672 | varobj must be either re-evaluated, or marked as invalid here. */ | |
2dbd25e5 | 2673 | |
54333c3b JK |
2674 | static void |
2675 | varobj_invalidate_iter (struct varobj *var, void *unused) | |
8756216b | 2676 | { |
4e969b4f AB |
2677 | /* global and floating var must be re-evaluated. */ |
2678 | if (var->root->floating || var->root->valid_block == NULL) | |
2dbd25e5 | 2679 | { |
54333c3b | 2680 | struct varobj *tmp_var; |
2dbd25e5 | 2681 | |
54333c3b JK |
2682 | /* Try to create a varobj with same expression. If we succeed |
2683 | replace the old varobj, otherwise invalidate it. */ | |
2684 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
2685 | USE_CURRENT_FRAME); | |
2686 | if (tmp_var != NULL) | |
2687 | { | |
2688 | tmp_var->obj_name = xstrdup (var->obj_name); | |
30914ca8 | 2689 | varobj_delete (var, 0); |
54333c3b | 2690 | install_variable (tmp_var); |
2dbd25e5 | 2691 | } |
54333c3b JK |
2692 | else |
2693 | var->root->is_valid = 0; | |
2dbd25e5 | 2694 | } |
54333c3b JK |
2695 | else /* locals must be invalidated. */ |
2696 | var->root->is_valid = 0; | |
2697 | } | |
2698 | ||
2699 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2700 | are defined on globals. | |
2701 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2702 | ||
2703 | void | |
2704 | varobj_invalidate (void) | |
2705 | { | |
2706 | all_root_varobjs (varobj_invalidate_iter, NULL); | |
8756216b | 2707 | } |
1c3569d4 MR |
2708 | \f |
2709 | extern void _initialize_varobj (void); | |
2710 | void | |
2711 | _initialize_varobj (void) | |
2712 | { | |
8d749320 | 2713 | varobj_table = XCNEWVEC (struct vlist *, VAROBJ_TABLE_SIZE); |
1c3569d4 MR |
2714 | |
2715 | add_setshow_zuinteger_cmd ("varobj", class_maintenance, | |
2716 | &varobjdebug, | |
2717 | _("Set varobj debugging."), | |
2718 | _("Show varobj debugging."), | |
2719 | _("When non-zero, varobj debugging is enabled."), | |
2720 | NULL, show_varobjdebug, | |
2721 | &setdebuglist, &showdebuglist); | |
2722 | } |