Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
42a4f53d | 3 | Copyright (C) 1999-2019 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" | |
268a13a5 | 29 | #include "gdbsupport/vec.h" |
6208b47d VP |
30 | #include "gdbthread.h" |
31 | #include "inferior.h" | |
827f100c | 32 | #include "varobj-iter.h" |
396af9a1 | 33 | #include "parser-defs.h" |
0d12e84c | 34 | #include "gdbarch.h" |
8b93c638 | 35 | |
b6313243 TT |
36 | #if HAVE_PYTHON |
37 | #include "python/python.h" | |
38 | #include "python/python-internal.h" | |
50389644 PA |
39 | #else |
40 | typedef int PyObject; | |
b6313243 TT |
41 | #endif |
42 | ||
8b93c638 JM |
43 | /* Non-zero if we want to see trace of varobj level stuff. */ |
44 | ||
ccce17b0 | 45 | unsigned int varobjdebug = 0; |
920d2a44 AC |
46 | static void |
47 | show_varobjdebug (struct ui_file *file, int from_tty, | |
48 | struct cmd_list_element *c, const char *value) | |
49 | { | |
50 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
51 | } | |
8b93c638 | 52 | |
581e13c1 | 53 | /* String representations of gdb's format codes. */ |
a121b7c1 | 54 | const char *varobj_format_string[] = |
1c35a88f | 55 | { "natural", "binary", "decimal", "hexadecimal", "octal", "zero-hexadecimal" }; |
8b93c638 | 56 | |
0cc7d26f | 57 | /* True if we want to allow Python-based pretty-printing. */ |
4c37490d | 58 | static bool pretty_printing = false; |
0cc7d26f TT |
59 | |
60 | void | |
61 | varobj_enable_pretty_printing (void) | |
62 | { | |
4c37490d | 63 | pretty_printing = true; |
0cc7d26f TT |
64 | } |
65 | ||
8b93c638 JM |
66 | /* Data structures */ |
67 | ||
68 | /* Every root variable has one of these structures saved in its | |
4d01a485 | 69 | varobj. */ |
8b93c638 | 70 | struct varobj_root |
72330bd6 | 71 | { |
4d01a485 PA |
72 | /* The expression for this parent. */ |
73 | expression_up exp; | |
8b93c638 | 74 | |
581e13c1 | 75 | /* Block for which this expression is valid. */ |
9e5b9d2b | 76 | const struct block *valid_block = NULL; |
8b93c638 | 77 | |
44a67aa7 VP |
78 | /* The frame for this expression. This field is set iff valid_block is |
79 | not NULL. */ | |
9e5b9d2b | 80 | struct frame_id frame = null_frame_id; |
8b93c638 | 81 | |
5d5658a1 | 82 | /* The global thread ID that this varobj_root belongs to. This field |
581e13c1 | 83 | is only valid if valid_block is not NULL. |
c5b48eac VP |
84 | When not 0, indicates which thread 'frame' belongs to. |
85 | When 0, indicates that the thread list was empty when the varobj_root | |
86 | was created. */ | |
9e5b9d2b | 87 | int thread_id = 0; |
c5b48eac | 88 | |
4c37490d | 89 | /* If true, the -var-update always recomputes the value in the |
a5defcdc | 90 | current thread and frame. Otherwise, variable object is |
581e13c1 | 91 | always updated in the specific scope/thread/frame. */ |
4c37490d | 92 | bool floating = false; |
73a93a32 | 93 | |
4c37490d | 94 | /* Flag that indicates validity: set to false when this varobj_root refers |
8756216b | 95 | to symbols that do not exist anymore. */ |
4c37490d | 96 | bool is_valid = true; |
8756216b | 97 | |
99ad9427 YQ |
98 | /* Language-related operations for this variable and its |
99 | children. */ | |
9e5b9d2b | 100 | const struct lang_varobj_ops *lang_ops = NULL; |
8b93c638 | 101 | |
581e13c1 | 102 | /* The varobj for this root node. */ |
9e5b9d2b | 103 | struct varobj *rootvar = NULL; |
8b93c638 | 104 | |
72330bd6 | 105 | /* Next root variable */ |
9e5b9d2b | 106 | struct varobj_root *next = NULL; |
72330bd6 | 107 | }; |
8b93c638 | 108 | |
bb5ce47a | 109 | /* Dynamic part of varobj. */ |
8b93c638 | 110 | |
bb5ce47a YQ |
111 | struct varobj_dynamic |
112 | { | |
b6313243 TT |
113 | /* Whether the children of this varobj were requested. This field is |
114 | used to decide if dynamic varobj should recompute their children. | |
115 | In the event that the frontend never asked for the children, we | |
116 | can avoid that. */ | |
bd046f64 | 117 | bool children_requested = false; |
b6313243 | 118 | |
0cc7d26f TT |
119 | /* The pretty-printer constructor. If NULL, then the default |
120 | pretty-printer will be looked up. If None, then no | |
121 | pretty-printer will be installed. */ | |
9e5b9d2b | 122 | PyObject *constructor = NULL; |
0cc7d26f | 123 | |
b6313243 TT |
124 | /* The pretty-printer that has been constructed. If NULL, then a |
125 | new printer object is needed, and one will be constructed. */ | |
9e5b9d2b | 126 | PyObject *pretty_printer = NULL; |
0cc7d26f TT |
127 | |
128 | /* The iterator returned by the printer's 'children' method, or NULL | |
129 | if not available. */ | |
9e5b9d2b | 130 | struct varobj_iter *child_iter = NULL; |
0cc7d26f TT |
131 | |
132 | /* We request one extra item from the iterator, so that we can | |
133 | report to the caller whether there are more items than we have | |
134 | already reported. However, we don't want to install this value | |
135 | when we read it, because that will mess up future updates. So, | |
136 | we stash it here instead. */ | |
9e5b9d2b | 137 | varobj_item *saved_item = NULL; |
72330bd6 | 138 | }; |
8b93c638 | 139 | |
8b93c638 JM |
140 | /* A list of varobjs */ |
141 | ||
142 | struct vlist | |
72330bd6 AC |
143 | { |
144 | struct varobj *var; | |
145 | struct vlist *next; | |
146 | }; | |
8b93c638 JM |
147 | |
148 | /* Private function prototypes */ | |
149 | ||
581e13c1 | 150 | /* Helper functions for the above subcommands. */ |
8b93c638 | 151 | |
4c37490d | 152 | static int delete_variable (struct varobj *, bool); |
8b93c638 | 153 | |
4c37490d | 154 | static void delete_variable_1 (int *, struct varobj *, bool, bool); |
8b93c638 | 155 | |
4c37490d | 156 | static bool install_variable (struct varobj *); |
8b93c638 | 157 | |
a14ed312 | 158 | static void uninstall_variable (struct varobj *); |
8b93c638 | 159 | |
2f408ecb | 160 | static struct varobj *create_child (struct varobj *, int, std::string &); |
8b93c638 | 161 | |
b6313243 | 162 | static struct varobj * |
5a2e0d6e YQ |
163 | create_child_with_value (struct varobj *parent, int index, |
164 | struct varobj_item *item); | |
b6313243 | 165 | |
8b93c638 JM |
166 | /* Utility routines */ |
167 | ||
a14ed312 | 168 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 169 | |
4c37490d SM |
170 | static bool update_type_if_necessary (struct varobj *var, |
171 | struct value *new_value); | |
8264ba82 | 172 | |
4c37490d SM |
173 | static bool install_new_value (struct varobj *var, struct value *value, |
174 | bool initial); | |
acd65feb | 175 | |
581e13c1 | 176 | /* Language-specific routines. */ |
8b93c638 | 177 | |
b09e2c59 | 178 | static int number_of_children (const struct varobj *); |
8b93c638 | 179 | |
2f408ecb | 180 | static std::string name_of_variable (const struct varobj *); |
8b93c638 | 181 | |
2f408ecb | 182 | static std::string name_of_child (struct varobj *, int); |
8b93c638 | 183 | |
4c37490d | 184 | static struct value *value_of_root (struct varobj **var_handle, bool *); |
8b93c638 | 185 | |
c1cc6152 | 186 | static struct value *value_of_child (const struct varobj *parent, int index); |
8b93c638 | 187 | |
2f408ecb PA |
188 | static std::string my_value_of_variable (struct varobj *var, |
189 | enum varobj_display_formats format); | |
8b93c638 | 190 | |
4c37490d | 191 | static bool is_root_p (const struct varobj *var); |
8b93c638 | 192 | |
9a1edae6 | 193 | static struct varobj *varobj_add_child (struct varobj *var, |
5a2e0d6e | 194 | struct varobj_item *item); |
b6313243 | 195 | |
8b93c638 JM |
196 | /* Private data */ |
197 | ||
581e13c1 | 198 | /* Mappings of varobj_display_formats enums to gdb's format codes. */ |
1c35a88f | 199 | static int format_code[] = { 0, 't', 'd', 'x', 'o', 'z' }; |
8b93c638 | 200 | |
581e13c1 | 201 | /* Header of the list of root variable objects. */ |
8b93c638 | 202 | static struct varobj_root *rootlist; |
8b93c638 | 203 | |
581e13c1 | 204 | /* Prime number indicating the number of buckets in the hash table. */ |
5fa13070 | 205 | /* A prime large enough to avoid too many collisions. */ |
8b93c638 JM |
206 | #define VAROBJ_TABLE_SIZE 227 |
207 | ||
581e13c1 | 208 | /* Pointer to the varobj hash table (built at run time). */ |
8b93c638 JM |
209 | static struct vlist **varobj_table; |
210 | ||
8b93c638 JM |
211 | \f |
212 | ||
213 | /* API Implementation */ | |
4c37490d | 214 | static bool |
b09e2c59 | 215 | is_root_p (const struct varobj *var) |
b2c2bd75 VP |
216 | { |
217 | return (var->root->rootvar == var); | |
218 | } | |
8b93c638 | 219 | |
d452c4bc | 220 | #ifdef HAVE_PYTHON |
6cd67bea TT |
221 | |
222 | /* See python-internal.h. */ | |
223 | gdbpy_enter_varobj::gdbpy_enter_varobj (const struct varobj *var) | |
224 | : gdbpy_enter (var->root->exp->gdbarch, var->root->exp->language_defn) | |
225 | { | |
226 | } | |
227 | ||
d452c4bc UW |
228 | #endif |
229 | ||
7d8547c9 AC |
230 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
231 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
232 | ||
233 | static struct frame_info * | |
234 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
235 | { | |
236 | struct frame_info *frame = NULL; | |
237 | ||
238 | if (frame_addr == (CORE_ADDR) 0) | |
239 | return NULL; | |
240 | ||
9d49bdc2 PA |
241 | for (frame = get_current_frame (); |
242 | frame != NULL; | |
243 | frame = get_prev_frame (frame)) | |
7d8547c9 | 244 | { |
1fac167a UW |
245 | /* The CORE_ADDR we get as argument was parsed from a string GDB |
246 | output as $fp. This output got truncated to gdbarch_addr_bit. | |
247 | Truncate the frame base address in the same manner before | |
248 | comparing it against our argument. */ | |
249 | CORE_ADDR frame_base = get_frame_base_address (frame); | |
250 | int addr_bit = gdbarch_addr_bit (get_frame_arch (frame)); | |
a109c7c1 | 251 | |
1fac167a UW |
252 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
253 | frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
254 | ||
255 | if (frame_base == frame_addr) | |
7d8547c9 AC |
256 | return frame; |
257 | } | |
9d49bdc2 PA |
258 | |
259 | return NULL; | |
7d8547c9 AC |
260 | } |
261 | ||
5fa13070 SM |
262 | /* Creates a varobj (not its children). */ |
263 | ||
8b93c638 | 264 | struct varobj * |
2f408ecb PA |
265 | varobj_create (const char *objname, |
266 | const char *expression, CORE_ADDR frame, enum varobj_type type) | |
8b93c638 | 267 | { |
581e13c1 | 268 | /* Fill out a varobj structure for the (root) variable being constructed. */ |
9e5b9d2b | 269 | std::unique_ptr<varobj> var (new varobj (new varobj_root)); |
8b93c638 JM |
270 | |
271 | if (expression != NULL) | |
272 | { | |
e4195b40 | 273 | struct frame_info *fi; |
35633fef | 274 | struct frame_id old_id = null_frame_id; |
3977b71f | 275 | const struct block *block; |
bbc13ae3 | 276 | const char *p; |
e55dccf0 | 277 | struct value *value = NULL; |
1bb9788d | 278 | CORE_ADDR pc; |
8b93c638 | 279 | |
9d49bdc2 PA |
280 | /* Parse and evaluate the expression, filling in as much of the |
281 | variable's data as possible. */ | |
282 | ||
283 | if (has_stack_frames ()) | |
284 | { | |
581e13c1 | 285 | /* Allow creator to specify context of variable. */ |
9d49bdc2 PA |
286 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
287 | fi = get_selected_frame (NULL); | |
288 | else | |
289 | /* FIXME: cagney/2002-11-23: This code should be doing a | |
290 | lookup using the frame ID and not just the frame's | |
291 | ``address''. This, of course, means an interface | |
292 | change. However, with out that interface change ISAs, | |
293 | such as the ia64 with its two stacks, won't work. | |
294 | Similar goes for the case where there is a frameless | |
295 | function. */ | |
296 | fi = find_frame_addr_in_frame_chain (frame); | |
297 | } | |
8b93c638 | 298 | else |
9d49bdc2 | 299 | fi = NULL; |
8b93c638 | 300 | |
73a93a32 | 301 | if (type == USE_SELECTED_FRAME) |
4c37490d | 302 | var->root->floating = true; |
73a93a32 | 303 | |
1bb9788d | 304 | pc = 0; |
8b93c638 JM |
305 | block = NULL; |
306 | if (fi != NULL) | |
1bb9788d TT |
307 | { |
308 | block = get_frame_block (fi, 0); | |
309 | pc = get_frame_pc (fi); | |
310 | } | |
8b93c638 JM |
311 | |
312 | p = expression; | |
699bd4cf TT |
313 | |
314 | innermost_block_tracker tracker (INNERMOST_BLOCK_FOR_SYMBOLS | |
315 | | INNERMOST_BLOCK_FOR_REGISTERS); | |
73a93a32 | 316 | /* Wrap the call to parse expression, so we can |
581e13c1 | 317 | return a sensible error. */ |
a70b8144 | 318 | try |
8e7b59a5 | 319 | { |
699bd4cf | 320 | var->root->exp = parse_exp_1 (&p, pc, block, 0, &tracker); |
8e7b59a5 KS |
321 | } |
322 | ||
230d2906 | 323 | catch (const gdb_exception_error &except) |
73a93a32 JI |
324 | { |
325 | return NULL; | |
326 | } | |
8b93c638 | 327 | |
581e13c1 | 328 | /* Don't allow variables to be created for types. */ |
608b4967 TT |
329 | if (var->root->exp->elts[0].opcode == OP_TYPE |
330 | || var->root->exp->elts[0].opcode == OP_TYPEOF | |
331 | || var->root->exp->elts[0].opcode == OP_DECLTYPE) | |
8b93c638 | 332 | { |
bc8332bb AC |
333 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
334 | " as an expression.\n"); | |
8b93c638 JM |
335 | return NULL; |
336 | } | |
337 | ||
9e5b9d2b | 338 | var->format = variable_default_display (var.get ()); |
e707fc44 | 339 | var->root->valid_block = |
699bd4cf | 340 | var->root->floating ? NULL : tracker.block (); |
2f408ecb | 341 | var->name = expression; |
02142340 | 342 | /* For a root var, the name and the expr are the same. */ |
2f408ecb | 343 | var->path_expr = expression; |
8b93c638 JM |
344 | |
345 | /* When the frame is different from the current frame, | |
346 | we must select the appropriate frame before parsing | |
347 | the expression, otherwise the value will not be current. | |
581e13c1 | 348 | Since select_frame is so benign, just call it for all cases. */ |
aee1fcdf | 349 | if (var->root->valid_block) |
8b93c638 | 350 | { |
4e22772d JK |
351 | /* User could specify explicit FRAME-ADDR which was not found but |
352 | EXPRESSION is frame specific and we would not be able to evaluate | |
353 | it correctly next time. With VALID_BLOCK set we must also set | |
354 | FRAME and THREAD_ID. */ | |
355 | if (fi == NULL) | |
356 | error (_("Failed to find the specified frame")); | |
357 | ||
7a424e99 | 358 | var->root->frame = get_frame_id (fi); |
00431a78 | 359 | var->root->thread_id = inferior_thread ()->global_num; |
35633fef | 360 | old_id = get_frame_id (get_selected_frame (NULL)); |
c5b48eac | 361 | select_frame (fi); |
8b93c638 JM |
362 | } |
363 | ||
340a7723 | 364 | /* We definitely need to catch errors here. |
8b93c638 | 365 | If evaluate_expression succeeds we got the value we wanted. |
581e13c1 | 366 | But if it fails, we still go on with a call to evaluate_type(). */ |
a70b8144 | 367 | try |
8e7b59a5 | 368 | { |
4d01a485 | 369 | value = evaluate_expression (var->root->exp.get ()); |
8e7b59a5 | 370 | } |
230d2906 | 371 | catch (const gdb_exception_error &except) |
e55dccf0 VP |
372 | { |
373 | /* Error getting the value. Try to at least get the | |
374 | right type. */ | |
4d01a485 | 375 | struct value *type_only_value = evaluate_type (var->root->exp.get ()); |
a109c7c1 | 376 | |
e55dccf0 VP |
377 | var->type = value_type (type_only_value); |
378 | } | |
8264ba82 | 379 | |
492d29ea PA |
380 | if (value != NULL) |
381 | { | |
382 | int real_type_found = 0; | |
383 | ||
384 | var->type = value_actual_type (value, 0, &real_type_found); | |
385 | if (real_type_found) | |
386 | value = value_cast (var->type, value); | |
387 | } | |
acd65feb | 388 | |
8b93c638 | 389 | /* Set language info */ |
ca20d462 | 390 | var->root->lang_ops = var->root->exp->language_defn->la_varobj_ops; |
8b93c638 | 391 | |
9e5b9d2b | 392 | install_new_value (var.get (), value, 1 /* Initial assignment */); |
d32cafc7 | 393 | |
581e13c1 | 394 | /* Set ourselves as our root. */ |
9e5b9d2b | 395 | var->root->rootvar = var.get (); |
8b93c638 | 396 | |
581e13c1 | 397 | /* Reset the selected frame. */ |
35633fef JK |
398 | if (frame_id_p (old_id)) |
399 | select_frame (frame_find_by_id (old_id)); | |
8b93c638 JM |
400 | } |
401 | ||
73a93a32 | 402 | /* If the variable object name is null, that means this |
581e13c1 | 403 | is a temporary variable, so don't install it. */ |
73a93a32 JI |
404 | |
405 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 | 406 | { |
2f408ecb | 407 | var->obj_name = objname; |
8b93c638 JM |
408 | |
409 | /* If a varobj name is duplicated, the install will fail so | |
581e13c1 | 410 | we must cleanup. */ |
9e5b9d2b SM |
411 | if (!install_variable (var.get ())) |
412 | return NULL; | |
8b93c638 JM |
413 | } |
414 | ||
9e5b9d2b | 415 | return var.release (); |
8b93c638 JM |
416 | } |
417 | ||
581e13c1 | 418 | /* Generates an unique name that can be used for a varobj. */ |
8b93c638 | 419 | |
2d6960b4 | 420 | std::string |
8b93c638 JM |
421 | varobj_gen_name (void) |
422 | { | |
423 | static int id = 0; | |
8b93c638 | 424 | |
581e13c1 | 425 | /* Generate a name for this object. */ |
8b93c638 | 426 | id++; |
2d6960b4 | 427 | return string_printf ("var%d", id); |
8b93c638 JM |
428 | } |
429 | ||
61d8f275 JK |
430 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
431 | error if OBJNAME cannot be found. */ | |
8b93c638 JM |
432 | |
433 | struct varobj * | |
2f408ecb | 434 | varobj_get_handle (const char *objname) |
8b93c638 JM |
435 | { |
436 | struct vlist *cv; | |
437 | const char *chp; | |
438 | unsigned int index = 0; | |
439 | unsigned int i = 1; | |
440 | ||
441 | for (chp = objname; *chp; chp++) | |
442 | { | |
443 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
444 | } | |
445 | ||
446 | cv = *(varobj_table + index); | |
2f408ecb | 447 | while (cv != NULL && cv->var->obj_name != objname) |
8b93c638 JM |
448 | cv = cv->next; |
449 | ||
450 | if (cv == NULL) | |
8a3fe4f8 | 451 | error (_("Variable object not found")); |
8b93c638 JM |
452 | |
453 | return cv->var; | |
454 | } | |
455 | ||
581e13c1 | 456 | /* Given the handle, return the name of the object. */ |
8b93c638 | 457 | |
2f408ecb | 458 | const char * |
b09e2c59 | 459 | varobj_get_objname (const struct varobj *var) |
8b93c638 | 460 | { |
2f408ecb | 461 | return var->obj_name.c_str (); |
8b93c638 JM |
462 | } |
463 | ||
2f408ecb PA |
464 | /* Given the handle, return the expression represented by the |
465 | object. */ | |
8b93c638 | 466 | |
2f408ecb | 467 | std::string |
b09e2c59 | 468 | varobj_get_expression (const struct varobj *var) |
8b93c638 JM |
469 | { |
470 | return name_of_variable (var); | |
471 | } | |
472 | ||
30914ca8 | 473 | /* See varobj.h. */ |
8b93c638 JM |
474 | |
475 | int | |
4c37490d | 476 | varobj_delete (struct varobj *var, bool only_children) |
8b93c638 | 477 | { |
30914ca8 | 478 | return delete_variable (var, only_children); |
8b93c638 JM |
479 | } |
480 | ||
d8b65138 JK |
481 | #if HAVE_PYTHON |
482 | ||
b6313243 TT |
483 | /* Convenience function for varobj_set_visualizer. Instantiate a |
484 | pretty-printer for a given value. */ | |
485 | static PyObject * | |
486 | instantiate_pretty_printer (PyObject *constructor, struct value *value) | |
487 | { | |
b6313243 TT |
488 | PyObject *val_obj = NULL; |
489 | PyObject *printer; | |
b6313243 | 490 | |
b6313243 | 491 | val_obj = value_to_value_object (value); |
b6313243 TT |
492 | if (! val_obj) |
493 | return NULL; | |
494 | ||
495 | printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL); | |
496 | Py_DECREF (val_obj); | |
497 | return printer; | |
b6313243 TT |
498 | } |
499 | ||
d8b65138 JK |
500 | #endif |
501 | ||
581e13c1 | 502 | /* Set/Get variable object display format. */ |
8b93c638 JM |
503 | |
504 | enum varobj_display_formats | |
505 | varobj_set_display_format (struct varobj *var, | |
506 | enum varobj_display_formats format) | |
507 | { | |
508 | switch (format) | |
509 | { | |
510 | case FORMAT_NATURAL: | |
511 | case FORMAT_BINARY: | |
512 | case FORMAT_DECIMAL: | |
513 | case FORMAT_HEXADECIMAL: | |
514 | case FORMAT_OCTAL: | |
1c35a88f | 515 | case FORMAT_ZHEXADECIMAL: |
8b93c638 JM |
516 | var->format = format; |
517 | break; | |
518 | ||
519 | default: | |
520 | var->format = variable_default_display (var); | |
521 | } | |
522 | ||
ae7d22a6 | 523 | if (varobj_value_is_changeable_p (var) |
b4d61099 | 524 | && var->value != nullptr && !value_lazy (var->value.get ())) |
ae7d22a6 | 525 | { |
b4d61099 | 526 | var->print_value = varobj_value_get_print_value (var->value.get (), |
99ad9427 | 527 | var->format, var); |
ae7d22a6 VP |
528 | } |
529 | ||
8b93c638 JM |
530 | return var->format; |
531 | } | |
532 | ||
533 | enum varobj_display_formats | |
b09e2c59 | 534 | varobj_get_display_format (const struct varobj *var) |
8b93c638 JM |
535 | { |
536 | return var->format; | |
537 | } | |
538 | ||
9b972014 | 539 | gdb::unique_xmalloc_ptr<char> |
b09e2c59 | 540 | varobj_get_display_hint (const struct varobj *var) |
b6313243 | 541 | { |
9b972014 | 542 | gdb::unique_xmalloc_ptr<char> result; |
b6313243 TT |
543 | |
544 | #if HAVE_PYTHON | |
0646da15 TT |
545 | if (!gdb_python_initialized) |
546 | return NULL; | |
547 | ||
bde7b3e3 | 548 | gdbpy_enter_varobj enter_py (var); |
d452c4bc | 549 | |
bb5ce47a YQ |
550 | if (var->dynamic->pretty_printer != NULL) |
551 | result = gdbpy_get_display_hint (var->dynamic->pretty_printer); | |
b6313243 TT |
552 | #endif |
553 | ||
554 | return result; | |
555 | } | |
556 | ||
0cc7d26f TT |
557 | /* Return true if the varobj has items after TO, false otherwise. */ |
558 | ||
4c37490d | 559 | bool |
b09e2c59 | 560 | varobj_has_more (const struct varobj *var, int to) |
0cc7d26f | 561 | { |
ddf0ea08 | 562 | if (var->children.size () > to) |
4c37490d | 563 | return true; |
ddf0ea08 SM |
564 | |
565 | return ((to == -1 || var->children.size () == to) | |
bb5ce47a | 566 | && (var->dynamic->saved_item != NULL)); |
0cc7d26f TT |
567 | } |
568 | ||
c5b48eac VP |
569 | /* If the variable object is bound to a specific thread, that |
570 | is its evaluation can always be done in context of a frame | |
571 | inside that thread, returns GDB id of the thread -- which | |
581e13c1 | 572 | is always positive. Otherwise, returns -1. */ |
c5b48eac | 573 | int |
b09e2c59 | 574 | varobj_get_thread_id (const struct varobj *var) |
c5b48eac VP |
575 | { |
576 | if (var->root->valid_block && var->root->thread_id > 0) | |
577 | return var->root->thread_id; | |
578 | else | |
579 | return -1; | |
580 | } | |
581 | ||
25d5ea92 | 582 | void |
4c37490d | 583 | varobj_set_frozen (struct varobj *var, bool frozen) |
25d5ea92 VP |
584 | { |
585 | /* When a variable is unfrozen, we don't fetch its value. | |
586 | The 'not_fetched' flag remains set, so next -var-update | |
587 | won't complain. | |
588 | ||
589 | We don't fetch the value, because for structures the client | |
590 | should do -var-update anyway. It would be bad to have different | |
591 | client-size logic for structure and other types. */ | |
592 | var->frozen = frozen; | |
593 | } | |
594 | ||
4c37490d | 595 | bool |
b09e2c59 | 596 | varobj_get_frozen (const struct varobj *var) |
25d5ea92 VP |
597 | { |
598 | return var->frozen; | |
599 | } | |
600 | ||
0cc7d26f TT |
601 | /* A helper function that restricts a range to what is actually |
602 | available in a VEC. This follows the usual rules for the meaning | |
603 | of FROM and TO -- if either is negative, the entire range is | |
604 | used. */ | |
605 | ||
99ad9427 | 606 | void |
ddf0ea08 SM |
607 | varobj_restrict_range (const std::vector<varobj *> &children, |
608 | int *from, int *to) | |
0cc7d26f | 609 | { |
ddf0ea08 SM |
610 | int len = children.size (); |
611 | ||
0cc7d26f TT |
612 | if (*from < 0 || *to < 0) |
613 | { | |
614 | *from = 0; | |
ddf0ea08 | 615 | *to = len; |
0cc7d26f TT |
616 | } |
617 | else | |
618 | { | |
ddf0ea08 SM |
619 | if (*from > len) |
620 | *from = len; | |
621 | if (*to > len) | |
622 | *to = len; | |
0cc7d26f TT |
623 | if (*from > *to) |
624 | *from = *to; | |
625 | } | |
626 | } | |
627 | ||
628 | /* A helper for update_dynamic_varobj_children that installs a new | |
629 | child when needed. */ | |
630 | ||
631 | static void | |
632 | install_dynamic_child (struct varobj *var, | |
0604393c SM |
633 | std::vector<varobj *> *changed, |
634 | std::vector<varobj *> *type_changed, | |
635 | std::vector<varobj *> *newobj, | |
636 | std::vector<varobj *> *unchanged, | |
4c37490d | 637 | bool *cchanged, |
0cc7d26f | 638 | int index, |
5a2e0d6e | 639 | struct varobj_item *item) |
0cc7d26f | 640 | { |
ddf0ea08 | 641 | if (var->children.size () < index + 1) |
0cc7d26f TT |
642 | { |
643 | /* There's no child yet. */ | |
5a2e0d6e | 644 | struct varobj *child = varobj_add_child (var, item); |
a109c7c1 | 645 | |
0604393c | 646 | if (newobj != NULL) |
0cc7d26f | 647 | { |
0604393c | 648 | newobj->push_back (child); |
4c37490d | 649 | *cchanged = true; |
0cc7d26f TT |
650 | } |
651 | } | |
bf8793bb | 652 | else |
0cc7d26f | 653 | { |
ddf0ea08 | 654 | varobj *existing = var->children[index]; |
4c37490d | 655 | bool type_updated = update_type_if_necessary (existing, item->value); |
bf8793bb | 656 | |
8264ba82 AG |
657 | if (type_updated) |
658 | { | |
0604393c SM |
659 | if (type_changed != NULL) |
660 | type_changed->push_back (existing); | |
8264ba82 | 661 | } |
5a2e0d6e | 662 | if (install_new_value (existing, item->value, 0)) |
0cc7d26f | 663 | { |
0604393c SM |
664 | if (!type_updated && changed != NULL) |
665 | changed->push_back (existing); | |
0cc7d26f | 666 | } |
0604393c SM |
667 | else if (!type_updated && unchanged != NULL) |
668 | unchanged->push_back (existing); | |
0cc7d26f TT |
669 | } |
670 | } | |
671 | ||
576ea091 YQ |
672 | #if HAVE_PYTHON |
673 | ||
4c37490d | 674 | static bool |
b09e2c59 | 675 | dynamic_varobj_has_child_method (const struct varobj *var) |
0cc7d26f | 676 | { |
bb5ce47a | 677 | PyObject *printer = var->dynamic->pretty_printer; |
0cc7d26f | 678 | |
0646da15 | 679 | if (!gdb_python_initialized) |
4c37490d | 680 | return false; |
0646da15 | 681 | |
bde7b3e3 TT |
682 | gdbpy_enter_varobj enter_py (var); |
683 | return PyObject_HasAttr (printer, gdbpy_children_cst); | |
0cc7d26f | 684 | } |
576ea091 | 685 | #endif |
0cc7d26f | 686 | |
e5250216 YQ |
687 | /* A factory for creating dynamic varobj's iterators. Returns an |
688 | iterator object suitable for iterating over VAR's children. */ | |
689 | ||
690 | static struct varobj_iter * | |
691 | varobj_get_iterator (struct varobj *var) | |
692 | { | |
576ea091 | 693 | #if HAVE_PYTHON |
e5250216 YQ |
694 | if (var->dynamic->pretty_printer) |
695 | return py_varobj_get_iterator (var, var->dynamic->pretty_printer); | |
576ea091 | 696 | #endif |
e5250216 YQ |
697 | |
698 | gdb_assert_not_reached (_("\ | |
699 | requested an iterator from a non-dynamic varobj")); | |
700 | } | |
701 | ||
827f100c YQ |
702 | /* Release and clear VAR's saved item, if any. */ |
703 | ||
704 | static void | |
705 | varobj_clear_saved_item (struct varobj_dynamic *var) | |
706 | { | |
707 | if (var->saved_item != NULL) | |
708 | { | |
22bc8444 | 709 | value_decref (var->saved_item->value); |
0a8beaba | 710 | delete var->saved_item; |
827f100c YQ |
711 | var->saved_item = NULL; |
712 | } | |
713 | } | |
0cc7d26f | 714 | |
4c37490d | 715 | static bool |
b6313243 | 716 | update_dynamic_varobj_children (struct varobj *var, |
0604393c SM |
717 | std::vector<varobj *> *changed, |
718 | std::vector<varobj *> *type_changed, | |
719 | std::vector<varobj *> *newobj, | |
720 | std::vector<varobj *> *unchanged, | |
4c37490d SM |
721 | bool *cchanged, |
722 | bool update_children, | |
0cc7d26f TT |
723 | int from, |
724 | int to) | |
b6313243 | 725 | { |
b6313243 | 726 | int i; |
b6313243 | 727 | |
4c37490d | 728 | *cchanged = false; |
b6313243 | 729 | |
bb5ce47a | 730 | if (update_children || var->dynamic->child_iter == NULL) |
b6313243 | 731 | { |
e5250216 YQ |
732 | varobj_iter_delete (var->dynamic->child_iter); |
733 | var->dynamic->child_iter = varobj_get_iterator (var); | |
b6313243 | 734 | |
827f100c | 735 | varobj_clear_saved_item (var->dynamic); |
b6313243 | 736 | |
e5250216 | 737 | i = 0; |
b6313243 | 738 | |
bb5ce47a | 739 | if (var->dynamic->child_iter == NULL) |
4c37490d | 740 | return false; |
b6313243 | 741 | } |
0cc7d26f | 742 | else |
ddf0ea08 | 743 | i = var->children.size (); |
b6313243 | 744 | |
0cc7d26f TT |
745 | /* We ask for one extra child, so that MI can report whether there |
746 | are more children. */ | |
747 | for (; to < 0 || i < to + 1; ++i) | |
b6313243 | 748 | { |
827f100c | 749 | varobj_item *item; |
b6313243 | 750 | |
0cc7d26f | 751 | /* See if there was a leftover from last time. */ |
827f100c | 752 | if (var->dynamic->saved_item != NULL) |
0cc7d26f | 753 | { |
bb5ce47a YQ |
754 | item = var->dynamic->saved_item; |
755 | var->dynamic->saved_item = NULL; | |
0cc7d26f TT |
756 | } |
757 | else | |
a4c8e806 | 758 | { |
e5250216 | 759 | item = varobj_iter_next (var->dynamic->child_iter); |
827f100c YQ |
760 | /* Release vitem->value so its lifetime is not bound to the |
761 | execution of a command. */ | |
762 | if (item != NULL && item->value != NULL) | |
895dafa6 | 763 | item->value = release_value (item->value).release (); |
a4c8e806 | 764 | } |
b6313243 | 765 | |
e5250216 YQ |
766 | if (item == NULL) |
767 | { | |
768 | /* Iteration is done. Remove iterator from VAR. */ | |
769 | varobj_iter_delete (var->dynamic->child_iter); | |
770 | var->dynamic->child_iter = NULL; | |
771 | break; | |
772 | } | |
0cc7d26f TT |
773 | /* We don't want to push the extra child on any report list. */ |
774 | if (to < 0 || i < to) | |
b6313243 | 775 | { |
4c37490d | 776 | bool can_mention = from < 0 || i >= from; |
0cc7d26f | 777 | |
0cc7d26f | 778 | install_dynamic_child (var, can_mention ? changed : NULL, |
8264ba82 | 779 | can_mention ? type_changed : NULL, |
fe978cb0 | 780 | can_mention ? newobj : NULL, |
0cc7d26f | 781 | can_mention ? unchanged : NULL, |
5e5ac9a5 | 782 | can_mention ? cchanged : NULL, i, |
827f100c YQ |
783 | item); |
784 | ||
0a8beaba | 785 | delete item; |
b6313243 | 786 | } |
0cc7d26f | 787 | else |
b6313243 | 788 | { |
bb5ce47a | 789 | var->dynamic->saved_item = item; |
b6313243 | 790 | |
0cc7d26f TT |
791 | /* We want to truncate the child list just before this |
792 | element. */ | |
793 | break; | |
794 | } | |
b6313243 TT |
795 | } |
796 | ||
ddf0ea08 | 797 | if (i < var->children.size ()) |
b6313243 | 798 | { |
4c37490d | 799 | *cchanged = true; |
ddf0ea08 SM |
800 | for (int j = i; j < var->children.size (); ++j) |
801 | varobj_delete (var->children[j], 0); | |
802 | ||
803 | var->children.resize (i); | |
b6313243 | 804 | } |
0cc7d26f TT |
805 | |
806 | /* If there are fewer children than requested, note that the list of | |
807 | children changed. */ | |
ddf0ea08 | 808 | if (to >= 0 && var->children.size () < to) |
4c37490d | 809 | *cchanged = true; |
0cc7d26f | 810 | |
ddf0ea08 | 811 | var->num_children = var->children.size (); |
b6313243 | 812 | |
4c37490d | 813 | return true; |
b6313243 | 814 | } |
25d5ea92 | 815 | |
8b93c638 JM |
816 | int |
817 | varobj_get_num_children (struct varobj *var) | |
818 | { | |
819 | if (var->num_children == -1) | |
b6313243 | 820 | { |
31f628ae | 821 | if (varobj_is_dynamic_p (var)) |
0cc7d26f | 822 | { |
4c37490d | 823 | bool dummy; |
0cc7d26f TT |
824 | |
825 | /* If we have a dynamic varobj, don't report -1 children. | |
826 | So, try to fetch some children first. */ | |
8264ba82 | 827 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, &dummy, |
4c37490d | 828 | false, 0, 0); |
0cc7d26f TT |
829 | } |
830 | else | |
b6313243 TT |
831 | var->num_children = number_of_children (var); |
832 | } | |
8b93c638 | 833 | |
0cc7d26f | 834 | return var->num_children >= 0 ? var->num_children : 0; |
8b93c638 JM |
835 | } |
836 | ||
837 | /* Creates a list of the immediate children of a variable object; | |
581e13c1 | 838 | the return code is the number of such children or -1 on error. */ |
8b93c638 | 839 | |
ddf0ea08 | 840 | const std::vector<varobj *> & |
0cc7d26f | 841 | varobj_list_children (struct varobj *var, int *from, int *to) |
8b93c638 | 842 | { |
bd046f64 | 843 | var->dynamic->children_requested = true; |
b6313243 | 844 | |
31f628ae | 845 | if (varobj_is_dynamic_p (var)) |
0cc7d26f | 846 | { |
4c37490d SM |
847 | bool children_changed; |
848 | ||
b6313243 TT |
849 | /* This, in theory, can result in the number of children changing without |
850 | frontend noticing. But well, calling -var-list-children on the same | |
851 | varobj twice is not something a sane frontend would do. */ | |
8264ba82 | 852 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, |
4c37490d | 853 | &children_changed, false, 0, *to); |
99ad9427 | 854 | varobj_restrict_range (var->children, from, to); |
0cc7d26f TT |
855 | return var->children; |
856 | } | |
8b93c638 | 857 | |
8b93c638 JM |
858 | if (var->num_children == -1) |
859 | var->num_children = number_of_children (var); | |
860 | ||
74a44383 DJ |
861 | /* If that failed, give up. */ |
862 | if (var->num_children == -1) | |
d56d46f5 | 863 | return var->children; |
74a44383 | 864 | |
28335dcc VP |
865 | /* If we're called when the list of children is not yet initialized, |
866 | allocate enough elements in it. */ | |
ddf0ea08 SM |
867 | while (var->children.size () < var->num_children) |
868 | var->children.push_back (NULL); | |
28335dcc | 869 | |
ddf0ea08 | 870 | for (int i = 0; i < var->num_children; i++) |
8b93c638 | 871 | { |
ddf0ea08 | 872 | if (var->children[i] == NULL) |
28335dcc VP |
873 | { |
874 | /* Either it's the first call to varobj_list_children for | |
875 | this variable object, and the child was never created, | |
876 | or it was explicitly deleted by the client. */ | |
2f408ecb | 877 | std::string name = name_of_child (var, i); |
ddf0ea08 | 878 | var->children[i] = create_child (var, i, name); |
28335dcc | 879 | } |
8b93c638 JM |
880 | } |
881 | ||
99ad9427 | 882 | varobj_restrict_range (var->children, from, to); |
d56d46f5 | 883 | return var->children; |
8b93c638 JM |
884 | } |
885 | ||
b6313243 | 886 | static struct varobj * |
5a2e0d6e | 887 | varobj_add_child (struct varobj *var, struct varobj_item *item) |
b6313243 | 888 | { |
ddf0ea08 SM |
889 | varobj *v = create_child_with_value (var, var->children.size (), item); |
890 | ||
891 | var->children.push_back (v); | |
a109c7c1 | 892 | |
b6313243 TT |
893 | return v; |
894 | } | |
895 | ||
8b93c638 | 896 | /* Obtain the type of an object Variable as a string similar to the one gdb |
afa269ae SM |
897 | prints on the console. The caller is responsible for freeing the string. |
898 | */ | |
8b93c638 | 899 | |
2f408ecb | 900 | std::string |
8b93c638 JM |
901 | varobj_get_type (struct varobj *var) |
902 | { | |
8ab91b96 | 903 | /* For the "fake" variables, do not return a type. (Its type is |
8756216b DP |
904 | NULL, too.) |
905 | Do not return a type for invalid variables as well. */ | |
906 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
2f408ecb | 907 | return std::string (); |
8b93c638 | 908 | |
1a4300e9 | 909 | return type_to_string (var->type); |
8b93c638 JM |
910 | } |
911 | ||
1ecb4ee0 DJ |
912 | /* Obtain the type of an object variable. */ |
913 | ||
914 | struct type * | |
b09e2c59 | 915 | varobj_get_gdb_type (const struct varobj *var) |
1ecb4ee0 DJ |
916 | { |
917 | return var->type; | |
918 | } | |
919 | ||
85254831 KS |
920 | /* Is VAR a path expression parent, i.e., can it be used to construct |
921 | a valid path expression? */ | |
922 | ||
4c37490d | 923 | static bool |
b09e2c59 | 924 | is_path_expr_parent (const struct varobj *var) |
85254831 | 925 | { |
9a9a7608 AB |
926 | gdb_assert (var->root->lang_ops->is_path_expr_parent != NULL); |
927 | return var->root->lang_ops->is_path_expr_parent (var); | |
928 | } | |
85254831 | 929 | |
9a9a7608 AB |
930 | /* Is VAR a path expression parent, i.e., can it be used to construct |
931 | a valid path expression? By default we assume any VAR can be a path | |
932 | parent. */ | |
85254831 | 933 | |
4c37490d | 934 | bool |
b09e2c59 | 935 | varobj_default_is_path_expr_parent (const struct varobj *var) |
9a9a7608 | 936 | { |
4c37490d | 937 | return true; |
85254831 KS |
938 | } |
939 | ||
940 | /* Return the path expression parent for VAR. */ | |
941 | ||
c1cc6152 SM |
942 | const struct varobj * |
943 | varobj_get_path_expr_parent (const struct varobj *var) | |
85254831 | 944 | { |
c1cc6152 | 945 | const struct varobj *parent = var; |
85254831 KS |
946 | |
947 | while (!is_root_p (parent) && !is_path_expr_parent (parent)) | |
948 | parent = parent->parent; | |
949 | ||
5abe0f0c JV |
950 | /* Computation of full rooted expression for children of dynamic |
951 | varobjs is not supported. */ | |
952 | if (varobj_is_dynamic_p (parent)) | |
953 | error (_("Invalid variable object (child of a dynamic varobj)")); | |
954 | ||
85254831 KS |
955 | return parent; |
956 | } | |
957 | ||
02142340 VP |
958 | /* Return a pointer to the full rooted expression of varobj VAR. |
959 | If it has not been computed yet, compute it. */ | |
2f408ecb PA |
960 | |
961 | const char * | |
c1cc6152 | 962 | varobj_get_path_expr (const struct varobj *var) |
02142340 | 963 | { |
2f408ecb | 964 | if (var->path_expr.empty ()) |
02142340 VP |
965 | { |
966 | /* For root varobjs, we initialize path_expr | |
967 | when creating varobj, so here it should be | |
968 | child varobj. */ | |
c1cc6152 | 969 | struct varobj *mutable_var = (struct varobj *) var; |
02142340 | 970 | gdb_assert (!is_root_p (var)); |
2568868e | 971 | |
c1cc6152 | 972 | mutable_var->path_expr = (*var->root->lang_ops->path_expr_of_child) (var); |
02142340 | 973 | } |
2568868e | 974 | |
2f408ecb | 975 | return var->path_expr.c_str (); |
02142340 VP |
976 | } |
977 | ||
fa4d0c40 | 978 | const struct language_defn * |
b09e2c59 | 979 | varobj_get_language (const struct varobj *var) |
8b93c638 | 980 | { |
fa4d0c40 | 981 | return var->root->exp->language_defn; |
8b93c638 JM |
982 | } |
983 | ||
984 | int | |
b09e2c59 | 985 | varobj_get_attributes (const struct varobj *var) |
8b93c638 JM |
986 | { |
987 | int attributes = 0; | |
988 | ||
340a7723 | 989 | if (varobj_editable_p (var)) |
581e13c1 | 990 | /* FIXME: define masks for attributes. */ |
8b93c638 JM |
991 | attributes |= 0x00000001; /* Editable */ |
992 | ||
993 | return attributes; | |
994 | } | |
995 | ||
cde5ef40 YQ |
996 | /* Return true if VAR is a dynamic varobj. */ |
997 | ||
4c37490d | 998 | bool |
b09e2c59 | 999 | varobj_is_dynamic_p (const struct varobj *var) |
0cc7d26f | 1000 | { |
bb5ce47a | 1001 | return var->dynamic->pretty_printer != NULL; |
0cc7d26f TT |
1002 | } |
1003 | ||
2f408ecb | 1004 | std::string |
de051565 MK |
1005 | varobj_get_formatted_value (struct varobj *var, |
1006 | enum varobj_display_formats format) | |
1007 | { | |
1008 | return my_value_of_variable (var, format); | |
1009 | } | |
1010 | ||
2f408ecb | 1011 | std::string |
8b93c638 JM |
1012 | varobj_get_value (struct varobj *var) |
1013 | { | |
de051565 | 1014 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
1015 | } |
1016 | ||
1017 | /* Set the value of an object variable (if it is editable) to the | |
581e13c1 MS |
1018 | value of the given expression. */ |
1019 | /* Note: Invokes functions that can call error(). */ | |
8b93c638 | 1020 | |
4c37490d | 1021 | bool |
2f408ecb | 1022 | varobj_set_value (struct varobj *var, const char *expression) |
8b93c638 | 1023 | { |
34365054 | 1024 | struct value *val = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1025 | /* The argument "expression" contains the variable's new value. |
581e13c1 MS |
1026 | We need to first construct a legal expression for this -- ugh! */ |
1027 | /* Does this cover all the bases? */ | |
34365054 | 1028 | struct value *value = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1029 | int saved_input_radix = input_radix; |
bbc13ae3 | 1030 | const char *s = expression; |
8b93c638 | 1031 | |
340a7723 | 1032 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 1033 | |
581e13c1 | 1034 | input_radix = 10; /* ALWAYS reset to decimal temporarily. */ |
4d01a485 | 1035 | expression_up exp = parse_exp_1 (&s, 0, 0, 0); |
a70b8144 | 1036 | try |
8e7b59a5 | 1037 | { |
4d01a485 | 1038 | value = evaluate_expression (exp.get ()); |
8e7b59a5 KS |
1039 | } |
1040 | ||
230d2906 | 1041 | catch (const gdb_exception_error &except) |
340a7723 | 1042 | { |
581e13c1 | 1043 | /* We cannot proceed without a valid expression. */ |
4c37490d | 1044 | return false; |
8b93c638 JM |
1045 | } |
1046 | ||
340a7723 NR |
1047 | /* All types that are editable must also be changeable. */ |
1048 | gdb_assert (varobj_value_is_changeable_p (var)); | |
1049 | ||
1050 | /* The value of a changeable variable object must not be lazy. */ | |
b4d61099 | 1051 | gdb_assert (!value_lazy (var->value.get ())); |
340a7723 NR |
1052 | |
1053 | /* Need to coerce the input. We want to check if the | |
1054 | value of the variable object will be different | |
1055 | after assignment, and the first thing value_assign | |
1056 | does is coerce the input. | |
1057 | For example, if we are assigning an array to a pointer variable we | |
b021a221 | 1058 | should compare the pointer with the array's address, not with the |
340a7723 NR |
1059 | array's content. */ |
1060 | value = coerce_array (value); | |
1061 | ||
8e7b59a5 KS |
1062 | /* The new value may be lazy. value_assign, or |
1063 | rather value_contents, will take care of this. */ | |
a70b8144 | 1064 | try |
8e7b59a5 | 1065 | { |
b4d61099 | 1066 | val = value_assign (var->value.get (), value); |
8e7b59a5 KS |
1067 | } |
1068 | ||
230d2906 | 1069 | catch (const gdb_exception_error &except) |
492d29ea | 1070 | { |
4c37490d | 1071 | return false; |
492d29ea | 1072 | } |
8e7b59a5 | 1073 | |
340a7723 NR |
1074 | /* If the value has changed, record it, so that next -var-update can |
1075 | report this change. If a variable had a value of '1', we've set it | |
1076 | to '333' and then set again to '1', when -var-update will report this | |
1077 | variable as changed -- because the first assignment has set the | |
1078 | 'updated' flag. There's no need to optimize that, because return value | |
1079 | of -var-update should be considered an approximation. */ | |
4c37490d | 1080 | var->updated = install_new_value (var, val, false /* Compare values. */); |
340a7723 | 1081 | input_radix = saved_input_radix; |
4c37490d | 1082 | return true; |
8b93c638 JM |
1083 | } |
1084 | ||
0cc7d26f TT |
1085 | #if HAVE_PYTHON |
1086 | ||
1087 | /* A helper function to install a constructor function and visualizer | |
bb5ce47a | 1088 | in a varobj_dynamic. */ |
0cc7d26f TT |
1089 | |
1090 | static void | |
bb5ce47a | 1091 | install_visualizer (struct varobj_dynamic *var, PyObject *constructor, |
0cc7d26f TT |
1092 | PyObject *visualizer) |
1093 | { | |
1094 | Py_XDECREF (var->constructor); | |
1095 | var->constructor = constructor; | |
1096 | ||
1097 | Py_XDECREF (var->pretty_printer); | |
1098 | var->pretty_printer = visualizer; | |
1099 | ||
e5250216 | 1100 | varobj_iter_delete (var->child_iter); |
0cc7d26f TT |
1101 | var->child_iter = NULL; |
1102 | } | |
1103 | ||
1104 | /* Install the default visualizer for VAR. */ | |
1105 | ||
1106 | static void | |
1107 | install_default_visualizer (struct varobj *var) | |
1108 | { | |
d65aec65 PM |
1109 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1110 | if (CPLUS_FAKE_CHILD (var)) | |
1111 | return; | |
1112 | ||
0cc7d26f TT |
1113 | if (pretty_printing) |
1114 | { | |
a31abe80 | 1115 | gdbpy_ref<> pretty_printer; |
0cc7d26f | 1116 | |
b4d61099 | 1117 | if (var->value != nullptr) |
0cc7d26f | 1118 | { |
b4d61099 | 1119 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value.get ()); |
a31abe80 | 1120 | if (pretty_printer == nullptr) |
0cc7d26f TT |
1121 | { |
1122 | gdbpy_print_stack (); | |
1123 | error (_("Cannot instantiate printer for default visualizer")); | |
1124 | } | |
1125 | } | |
a31abe80 | 1126 | |
0cc7d26f | 1127 | if (pretty_printer == Py_None) |
895dafa6 | 1128 | pretty_printer.reset (nullptr); |
0cc7d26f | 1129 | |
a31abe80 | 1130 | install_visualizer (var->dynamic, NULL, pretty_printer.release ()); |
0cc7d26f TT |
1131 | } |
1132 | } | |
1133 | ||
1134 | /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to | |
1135 | make a new object. */ | |
1136 | ||
1137 | static void | |
1138 | construct_visualizer (struct varobj *var, PyObject *constructor) | |
1139 | { | |
1140 | PyObject *pretty_printer; | |
1141 | ||
d65aec65 PM |
1142 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1143 | if (CPLUS_FAKE_CHILD (var)) | |
1144 | return; | |
1145 | ||
0cc7d26f TT |
1146 | Py_INCREF (constructor); |
1147 | if (constructor == Py_None) | |
1148 | pretty_printer = NULL; | |
1149 | else | |
1150 | { | |
b4d61099 TT |
1151 | pretty_printer = instantiate_pretty_printer (constructor, |
1152 | var->value.get ()); | |
0cc7d26f TT |
1153 | if (! pretty_printer) |
1154 | { | |
1155 | gdbpy_print_stack (); | |
1156 | Py_DECREF (constructor); | |
1157 | constructor = Py_None; | |
1158 | Py_INCREF (constructor); | |
1159 | } | |
1160 | ||
1161 | if (pretty_printer == Py_None) | |
1162 | { | |
1163 | Py_DECREF (pretty_printer); | |
1164 | pretty_printer = NULL; | |
1165 | } | |
1166 | } | |
1167 | ||
bb5ce47a | 1168 | install_visualizer (var->dynamic, constructor, pretty_printer); |
0cc7d26f TT |
1169 | } |
1170 | ||
1171 | #endif /* HAVE_PYTHON */ | |
1172 | ||
1173 | /* A helper function for install_new_value. This creates and installs | |
1174 | a visualizer for VAR, if appropriate. */ | |
1175 | ||
1176 | static void | |
1177 | install_new_value_visualizer (struct varobj *var) | |
1178 | { | |
1179 | #if HAVE_PYTHON | |
1180 | /* If the constructor is None, then we want the raw value. If VAR | |
1181 | does not have a value, just skip this. */ | |
0646da15 TT |
1182 | if (!gdb_python_initialized) |
1183 | return; | |
1184 | ||
bb5ce47a | 1185 | if (var->dynamic->constructor != Py_None && var->value != NULL) |
0cc7d26f | 1186 | { |
bde7b3e3 | 1187 | gdbpy_enter_varobj enter_py (var); |
0cc7d26f | 1188 | |
bb5ce47a | 1189 | if (var->dynamic->constructor == NULL) |
0cc7d26f TT |
1190 | install_default_visualizer (var); |
1191 | else | |
bb5ce47a | 1192 | construct_visualizer (var, var->dynamic->constructor); |
0cc7d26f TT |
1193 | } |
1194 | #else | |
1195 | /* Do nothing. */ | |
1196 | #endif | |
1197 | } | |
1198 | ||
8264ba82 AG |
1199 | /* When using RTTI to determine variable type it may be changed in runtime when |
1200 | the variable value is changed. This function checks whether type of varobj | |
1201 | VAR will change when a new value NEW_VALUE is assigned and if it is so | |
1202 | updates the type of VAR. */ | |
1203 | ||
4c37490d | 1204 | static bool |
8264ba82 AG |
1205 | update_type_if_necessary (struct varobj *var, struct value *new_value) |
1206 | { | |
1207 | if (new_value) | |
1208 | { | |
1209 | struct value_print_options opts; | |
1210 | ||
1211 | get_user_print_options (&opts); | |
1212 | if (opts.objectprint) | |
1213 | { | |
2f408ecb PA |
1214 | struct type *new_type = value_actual_type (new_value, 0, 0); |
1215 | std::string new_type_str = type_to_string (new_type); | |
1216 | std::string curr_type_str = varobj_get_type (var); | |
8264ba82 | 1217 | |
2f408ecb PA |
1218 | /* Did the type name change? */ |
1219 | if (curr_type_str != new_type_str) | |
8264ba82 AG |
1220 | { |
1221 | var->type = new_type; | |
1222 | ||
1223 | /* This information may be not valid for a new type. */ | |
30914ca8 | 1224 | varobj_delete (var, 1); |
ddf0ea08 | 1225 | var->children.clear (); |
8264ba82 | 1226 | var->num_children = -1; |
4c37490d | 1227 | return true; |
8264ba82 AG |
1228 | } |
1229 | } | |
1230 | } | |
1231 | ||
4c37490d | 1232 | return false; |
8264ba82 AG |
1233 | } |
1234 | ||
4c37490d SM |
1235 | /* Assign a new value to a variable object. If INITIAL is true, |
1236 | this is the first assignment after the variable object was just | |
acd65feb | 1237 | created, or changed type. In that case, just assign the value |
4c37490d SM |
1238 | and return false. |
1239 | Otherwise, assign the new value, and return true if the value is | |
1240 | different from the current one, false otherwise. The comparison is | |
581e13c1 MS |
1241 | done on textual representation of value. Therefore, some types |
1242 | need not be compared. E.g. for structures the reported value is | |
1243 | always "{...}", so no comparison is necessary here. If the old | |
4c37490d | 1244 | value was NULL and new one is not, or vice versa, we always return true. |
b26ed50d VP |
1245 | |
1246 | The VALUE parameter should not be released -- the function will | |
1247 | take care of releasing it when needed. */ | |
4c37490d SM |
1248 | static bool |
1249 | install_new_value (struct varobj *var, struct value *value, bool initial) | |
acd65feb | 1250 | { |
4c37490d SM |
1251 | bool changeable; |
1252 | bool need_to_fetch; | |
1253 | bool changed = false; | |
1254 | bool intentionally_not_fetched = false; | |
acd65feb | 1255 | |
acd65feb | 1256 | /* We need to know the varobj's type to decide if the value should |
3e43a32a | 1257 | be fetched or not. C++ fake children (public/protected/private) |
581e13c1 | 1258 | don't have a type. */ |
acd65feb | 1259 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); |
b2c2bd75 | 1260 | changeable = varobj_value_is_changeable_p (var); |
b6313243 TT |
1261 | |
1262 | /* If the type has custom visualizer, we consider it to be always | |
581e13c1 | 1263 | changeable. FIXME: need to make sure this behaviour will not |
b6313243 | 1264 | mess up read-sensitive values. */ |
bb5ce47a | 1265 | if (var->dynamic->pretty_printer != NULL) |
4c37490d | 1266 | changeable = true; |
b6313243 | 1267 | |
acd65feb VP |
1268 | need_to_fetch = changeable; |
1269 | ||
b26ed50d VP |
1270 | /* We are not interested in the address of references, and given |
1271 | that in C++ a reference is not rebindable, it cannot | |
1272 | meaningfully change. So, get hold of the real value. */ | |
1273 | if (value) | |
0cc7d26f | 1274 | value = coerce_ref (value); |
b26ed50d | 1275 | |
acd65feb VP |
1276 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1277 | /* For unions, we need to fetch the value implicitly because | |
1278 | of implementation of union member fetch. When gdb | |
1279 | creates a value for a field and the value of the enclosing | |
1280 | structure is not lazy, it immediately copies the necessary | |
1281 | bytes from the enclosing values. If the enclosing value is | |
1282 | lazy, the call to value_fetch_lazy on the field will read | |
1283 | the data from memory. For unions, that means we'll read the | |
1284 | same memory more than once, which is not desirable. So | |
1285 | fetch now. */ | |
4c37490d | 1286 | need_to_fetch = true; |
acd65feb VP |
1287 | |
1288 | /* The new value might be lazy. If the type is changeable, | |
1289 | that is we'll be comparing values of this type, fetch the | |
1290 | value now. Otherwise, on the next update the old value | |
1291 | will be lazy, which means we've lost that old value. */ | |
1292 | if (need_to_fetch && value && value_lazy (value)) | |
1293 | { | |
c1cc6152 | 1294 | const struct varobj *parent = var->parent; |
4c37490d | 1295 | bool frozen = var->frozen; |
a109c7c1 | 1296 | |
25d5ea92 VP |
1297 | for (; !frozen && parent; parent = parent->parent) |
1298 | frozen |= parent->frozen; | |
1299 | ||
1300 | if (frozen && initial) | |
1301 | { | |
1302 | /* For variables that are frozen, or are children of frozen | |
1303 | variables, we don't do fetch on initial assignment. | |
1304 | For non-initial assignemnt we do the fetch, since it means we're | |
1305 | explicitly asked to compare the new value with the old one. */ | |
4c37490d | 1306 | intentionally_not_fetched = true; |
25d5ea92 | 1307 | } |
8e7b59a5 | 1308 | else |
acd65feb | 1309 | { |
8e7b59a5 | 1310 | |
a70b8144 | 1311 | try |
8e7b59a5 KS |
1312 | { |
1313 | value_fetch_lazy (value); | |
1314 | } | |
1315 | ||
230d2906 | 1316 | catch (const gdb_exception_error &except) |
8e7b59a5 KS |
1317 | { |
1318 | /* Set the value to NULL, so that for the next -var-update, | |
1319 | we don't try to compare the new value with this value, | |
1320 | that we couldn't even read. */ | |
1321 | value = NULL; | |
1322 | } | |
acd65feb | 1323 | } |
acd65feb VP |
1324 | } |
1325 | ||
e848a8a5 TT |
1326 | /* Get a reference now, before possibly passing it to any Python |
1327 | code that might release it. */ | |
b4d61099 | 1328 | value_ref_ptr value_holder; |
e848a8a5 | 1329 | if (value != NULL) |
bbfa6f00 | 1330 | value_holder = value_ref_ptr::new_reference (value); |
b6313243 | 1331 | |
7a4d50bf VP |
1332 | /* Below, we'll be comparing string rendering of old and new |
1333 | values. Don't get string rendering if the value is | |
1334 | lazy -- if it is, the code above has decided that the value | |
1335 | should not be fetched. */ | |
2f408ecb | 1336 | std::string print_value; |
bb5ce47a YQ |
1337 | if (value != NULL && !value_lazy (value) |
1338 | && var->dynamic->pretty_printer == NULL) | |
99ad9427 | 1339 | print_value = varobj_value_get_print_value (value, var->format, var); |
7a4d50bf | 1340 | |
acd65feb VP |
1341 | /* If the type is changeable, compare the old and the new values. |
1342 | If this is the initial assignment, we don't have any old value | |
1343 | to compare with. */ | |
7a4d50bf | 1344 | if (!initial && changeable) |
acd65feb | 1345 | { |
3e43a32a MS |
1346 | /* If the value of the varobj was changed by -var-set-value, |
1347 | then the value in the varobj and in the target is the same. | |
1348 | However, that value is different from the value that the | |
581e13c1 | 1349 | varobj had after the previous -var-update. So need to the |
3e43a32a | 1350 | varobj as changed. */ |
acd65feb | 1351 | if (var->updated) |
4c37490d | 1352 | changed = true; |
bb5ce47a | 1353 | else if (var->dynamic->pretty_printer == NULL) |
acd65feb VP |
1354 | { |
1355 | /* Try to compare the values. That requires that both | |
1356 | values are non-lazy. */ | |
b4d61099 | 1357 | if (var->not_fetched && value_lazy (var->value.get ())) |
25d5ea92 VP |
1358 | { |
1359 | /* This is a frozen varobj and the value was never read. | |
1360 | Presumably, UI shows some "never read" indicator. | |
1361 | Now that we've fetched the real value, we need to report | |
1362 | this varobj as changed so that UI can show the real | |
1363 | value. */ | |
4c37490d | 1364 | changed = true; |
25d5ea92 VP |
1365 | } |
1366 | else if (var->value == NULL && value == NULL) | |
581e13c1 | 1367 | /* Equal. */ |
acd65feb VP |
1368 | ; |
1369 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1370 | { |
4c37490d | 1371 | changed = true; |
57e66780 | 1372 | } |
acd65feb VP |
1373 | else |
1374 | { | |
b4d61099 | 1375 | gdb_assert (!value_lazy (var->value.get ())); |
acd65feb | 1376 | gdb_assert (!value_lazy (value)); |
85265413 | 1377 | |
2f408ecb PA |
1378 | gdb_assert (!var->print_value.empty () && !print_value.empty ()); |
1379 | if (var->print_value != print_value) | |
4c37490d | 1380 | changed = true; |
acd65feb VP |
1381 | } |
1382 | } | |
1383 | } | |
85265413 | 1384 | |
ee342b23 VP |
1385 | if (!initial && !changeable) |
1386 | { | |
1387 | /* For values that are not changeable, we don't compare the values. | |
1388 | However, we want to notice if a value was not NULL and now is NULL, | |
1389 | or vise versa, so that we report when top-level varobjs come in scope | |
1390 | and leave the scope. */ | |
1391 | changed = (var->value != NULL) != (value != NULL); | |
1392 | } | |
1393 | ||
acd65feb | 1394 | /* We must always keep the new value, since children depend on it. */ |
b4d61099 | 1395 | var->value = value_holder; |
25d5ea92 | 1396 | if (value && value_lazy (value) && intentionally_not_fetched) |
4c37490d | 1397 | var->not_fetched = true; |
25d5ea92 | 1398 | else |
4c37490d SM |
1399 | var->not_fetched = false; |
1400 | var->updated = false; | |
85265413 | 1401 | |
0cc7d26f TT |
1402 | install_new_value_visualizer (var); |
1403 | ||
1404 | /* If we installed a pretty-printer, re-compare the printed version | |
1405 | to see if the variable changed. */ | |
bb5ce47a | 1406 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f | 1407 | { |
b4d61099 TT |
1408 | print_value = varobj_value_get_print_value (var->value.get (), |
1409 | var->format, var); | |
2f408ecb PA |
1410 | if ((var->print_value.empty () && !print_value.empty ()) |
1411 | || (!var->print_value.empty () && print_value.empty ()) | |
1412 | || (!var->print_value.empty () && !print_value.empty () | |
1413 | && var->print_value != print_value)) | |
4c37490d | 1414 | changed = true; |
0cc7d26f | 1415 | } |
0cc7d26f TT |
1416 | var->print_value = print_value; |
1417 | ||
b4d61099 | 1418 | gdb_assert (var->value == nullptr || value_type (var->value.get ())); |
acd65feb VP |
1419 | |
1420 | return changed; | |
1421 | } | |
acd65feb | 1422 | |
0cc7d26f TT |
1423 | /* Return the requested range for a varobj. VAR is the varobj. FROM |
1424 | and TO are out parameters; *FROM and *TO will be set to the | |
1425 | selected sub-range of VAR. If no range was selected using | |
1426 | -var-set-update-range, then both will be -1. */ | |
1427 | void | |
b09e2c59 | 1428 | varobj_get_child_range (const struct varobj *var, int *from, int *to) |
b6313243 | 1429 | { |
0cc7d26f TT |
1430 | *from = var->from; |
1431 | *to = var->to; | |
b6313243 TT |
1432 | } |
1433 | ||
0cc7d26f TT |
1434 | /* Set the selected sub-range of children of VAR to start at index |
1435 | FROM and end at index TO. If either FROM or TO is less than zero, | |
1436 | this is interpreted as a request for all children. */ | |
1437 | void | |
1438 | varobj_set_child_range (struct varobj *var, int from, int to) | |
b6313243 | 1439 | { |
0cc7d26f TT |
1440 | var->from = from; |
1441 | var->to = to; | |
b6313243 TT |
1442 | } |
1443 | ||
1444 | void | |
1445 | varobj_set_visualizer (struct varobj *var, const char *visualizer) | |
1446 | { | |
1447 | #if HAVE_PYTHON | |
bde7b3e3 | 1448 | PyObject *mainmod; |
b6313243 | 1449 | |
0646da15 TT |
1450 | if (!gdb_python_initialized) |
1451 | return; | |
1452 | ||
bde7b3e3 | 1453 | gdbpy_enter_varobj enter_py (var); |
b6313243 TT |
1454 | |
1455 | mainmod = PyImport_AddModule ("__main__"); | |
7c66fffc TT |
1456 | gdbpy_ref<> globals |
1457 | = gdbpy_ref<>::new_reference (PyModule_GetDict (mainmod)); | |
7780f186 TT |
1458 | gdbpy_ref<> constructor (PyRun_String (visualizer, Py_eval_input, |
1459 | globals.get (), globals.get ())); | |
b6313243 | 1460 | |
bde7b3e3 | 1461 | if (constructor == NULL) |
b6313243 TT |
1462 | { |
1463 | gdbpy_print_stack (); | |
da1f2771 | 1464 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
b6313243 TT |
1465 | } |
1466 | ||
bde7b3e3 | 1467 | construct_visualizer (var, constructor.get ()); |
b6313243 | 1468 | |
0cc7d26f | 1469 | /* If there are any children now, wipe them. */ |
30914ca8 | 1470 | varobj_delete (var, 1 /* children only */); |
0cc7d26f | 1471 | var->num_children = -1; |
b6313243 | 1472 | #else |
da1f2771 | 1473 | error (_("Python support required")); |
b6313243 TT |
1474 | #endif |
1475 | } | |
1476 | ||
7a290c40 | 1477 | /* If NEW_VALUE is the new value of the given varobj (var), return |
4c37490d | 1478 | true if var has mutated. In other words, if the type of |
7a290c40 JB |
1479 | the new value is different from the type of the varobj's old |
1480 | value. | |
1481 | ||
1482 | NEW_VALUE may be NULL, if the varobj is now out of scope. */ | |
1483 | ||
4c37490d | 1484 | static bool |
b09e2c59 | 1485 | varobj_value_has_mutated (const struct varobj *var, struct value *new_value, |
7a290c40 JB |
1486 | struct type *new_type) |
1487 | { | |
1488 | /* If we haven't previously computed the number of children in var, | |
1489 | it does not matter from the front-end's perspective whether | |
1490 | the type has mutated or not. For all intents and purposes, | |
1491 | it has not mutated. */ | |
1492 | if (var->num_children < 0) | |
4c37490d | 1493 | return false; |
7a290c40 | 1494 | |
4c37490d | 1495 | if (var->root->lang_ops->value_has_mutated != NULL) |
8776cfe9 JB |
1496 | { |
1497 | /* The varobj module, when installing new values, explicitly strips | |
1498 | references, saying that we're not interested in those addresses. | |
1499 | But detection of mutation happens before installing the new | |
1500 | value, so our value may be a reference that we need to strip | |
1501 | in order to remain consistent. */ | |
1502 | if (new_value != NULL) | |
1503 | new_value = coerce_ref (new_value); | |
1504 | return var->root->lang_ops->value_has_mutated (var, new_value, new_type); | |
1505 | } | |
7a290c40 | 1506 | else |
4c37490d | 1507 | return false; |
7a290c40 JB |
1508 | } |
1509 | ||
8b93c638 JM |
1510 | /* Update the values for a variable and its children. This is a |
1511 | two-pronged attack. First, re-parse the value for the root's | |
1512 | expression to see if it's changed. Then go all the way | |
1513 | through its children, reconstructing them and noting if they've | |
1514 | changed. | |
1515 | ||
4c37490d | 1516 | The IS_EXPLICIT parameter specifies if this call is result |
25d5ea92 | 1517 | of MI request to update this specific variable, or |
581e13c1 | 1518 | result of implicit -var-update *. For implicit request, we don't |
25d5ea92 | 1519 | update frozen variables. |
705da579 | 1520 | |
581e13c1 | 1521 | NOTE: This function may delete the caller's varobj. If it |
8756216b DP |
1522 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1523 | to point to the new varobj. */ | |
8b93c638 | 1524 | |
0604393c | 1525 | std::vector<varobj_update_result> |
4c37490d | 1526 | varobj_update (struct varobj **varp, bool is_explicit) |
8b93c638 | 1527 | { |
4c37490d | 1528 | bool type_changed = false; |
fe978cb0 | 1529 | struct value *newobj; |
0604393c SM |
1530 | std::vector<varobj_update_result> stack; |
1531 | std::vector<varobj_update_result> result; | |
8b93c638 | 1532 | |
25d5ea92 VP |
1533 | /* Frozen means frozen -- we don't check for any change in |
1534 | this varobj, including its going out of scope, or | |
1535 | changing type. One use case for frozen varobjs is | |
1536 | retaining previously evaluated expressions, and we don't | |
1537 | want them to be reevaluated at all. */ | |
fe978cb0 | 1538 | if (!is_explicit && (*varp)->frozen) |
f7f9ae2c | 1539 | return result; |
8756216b DP |
1540 | |
1541 | if (!(*varp)->root->is_valid) | |
f7f9ae2c | 1542 | { |
0604393c | 1543 | result.emplace_back (*varp, VAROBJ_INVALID); |
f7f9ae2c VP |
1544 | return result; |
1545 | } | |
8b93c638 | 1546 | |
25d5ea92 | 1547 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1548 | { |
0604393c | 1549 | varobj_update_result r (*varp); |
f7f9ae2c | 1550 | |
581e13c1 | 1551 | /* Update the root variable. value_of_root can return NULL |
25d5ea92 | 1552 | if the variable is no longer around, i.e. we stepped out of |
581e13c1 | 1553 | the frame in which a local existed. We are letting the |
25d5ea92 VP |
1554 | value_of_root variable dispose of the varobj if the type |
1555 | has changed. */ | |
fe978cb0 | 1556 | newobj = value_of_root (varp, &type_changed); |
4c37490d SM |
1557 | if (update_type_if_necessary (*varp, newobj)) |
1558 | type_changed = true; | |
f7f9ae2c | 1559 | r.varobj = *varp; |
f7f9ae2c | 1560 | r.type_changed = type_changed; |
fe978cb0 | 1561 | if (install_new_value ((*varp), newobj, type_changed)) |
4c37490d | 1562 | r.changed = true; |
ea56f9c2 | 1563 | |
fe978cb0 | 1564 | if (newobj == NULL) |
f7f9ae2c | 1565 | r.status = VAROBJ_NOT_IN_SCOPE; |
4c37490d | 1566 | r.value_installed = true; |
f7f9ae2c VP |
1567 | |
1568 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
b6313243 | 1569 | { |
0b4bc29a | 1570 | if (r.type_changed || r.changed) |
0604393c SM |
1571 | result.push_back (std::move (r)); |
1572 | ||
b6313243 TT |
1573 | return result; |
1574 | } | |
a109c7c1 | 1575 | |
0604393c | 1576 | stack.push_back (std::move (r)); |
b20d8971 | 1577 | } |
0604393c SM |
1578 | else |
1579 | stack.emplace_back (*varp); | |
8b93c638 | 1580 | |
8756216b | 1581 | /* Walk through the children, reconstructing them all. */ |
0604393c | 1582 | while (!stack.empty ()) |
8b93c638 | 1583 | { |
0604393c SM |
1584 | varobj_update_result r = std::move (stack.back ()); |
1585 | stack.pop_back (); | |
b6313243 TT |
1586 | struct varobj *v = r.varobj; |
1587 | ||
b6313243 TT |
1588 | /* Update this variable, unless it's a root, which is already |
1589 | updated. */ | |
1590 | if (!r.value_installed) | |
7a290c40 JB |
1591 | { |
1592 | struct type *new_type; | |
1593 | ||
fe978cb0 | 1594 | newobj = value_of_child (v->parent, v->index); |
4c37490d SM |
1595 | if (update_type_if_necessary (v, newobj)) |
1596 | r.type_changed = true; | |
fe978cb0 PA |
1597 | if (newobj) |
1598 | new_type = value_type (newobj); | |
7a290c40 | 1599 | else |
ca20d462 | 1600 | new_type = v->root->lang_ops->type_of_child (v->parent, v->index); |
7a290c40 | 1601 | |
fe978cb0 | 1602 | if (varobj_value_has_mutated (v, newobj, new_type)) |
7a290c40 JB |
1603 | { |
1604 | /* The children are no longer valid; delete them now. | |
1605 | Report the fact that its type changed as well. */ | |
30914ca8 | 1606 | varobj_delete (v, 1 /* only_children */); |
7a290c40 JB |
1607 | v->num_children = -1; |
1608 | v->to = -1; | |
1609 | v->from = -1; | |
1610 | v->type = new_type; | |
4c37490d | 1611 | r.type_changed = true; |
7a290c40 JB |
1612 | } |
1613 | ||
fe978cb0 | 1614 | if (install_new_value (v, newobj, r.type_changed)) |
b6313243 | 1615 | { |
4c37490d SM |
1616 | r.changed = true; |
1617 | v->updated = false; | |
b6313243 TT |
1618 | } |
1619 | } | |
1620 | ||
31f628ae YQ |
1621 | /* We probably should not get children of a dynamic varobj, but |
1622 | for which -var-list-children was never invoked. */ | |
1623 | if (varobj_is_dynamic_p (v)) | |
b6313243 | 1624 | { |
b926417a | 1625 | std::vector<varobj *> changed, type_changed_vec, unchanged, newobj_vec; |
4c37490d | 1626 | bool children_changed = false; |
b6313243 TT |
1627 | |
1628 | if (v->frozen) | |
1629 | continue; | |
1630 | ||
bd046f64 | 1631 | if (!v->dynamic->children_requested) |
0cc7d26f | 1632 | { |
4c37490d | 1633 | bool dummy; |
0cc7d26f TT |
1634 | |
1635 | /* If we initially did not have potential children, but | |
1636 | now we do, consider the varobj as changed. | |
1637 | Otherwise, if children were never requested, consider | |
1638 | it as unchanged -- presumably, such varobj is not yet | |
1639 | expanded in the UI, so we need not bother getting | |
1640 | it. */ | |
1641 | if (!varobj_has_more (v, 0)) | |
1642 | { | |
8264ba82 | 1643 | update_dynamic_varobj_children (v, NULL, NULL, NULL, NULL, |
4c37490d | 1644 | &dummy, false, 0, 0); |
0cc7d26f | 1645 | if (varobj_has_more (v, 0)) |
4c37490d | 1646 | r.changed = true; |
0cc7d26f TT |
1647 | } |
1648 | ||
1649 | if (r.changed) | |
0604393c | 1650 | result.push_back (std::move (r)); |
0cc7d26f TT |
1651 | |
1652 | continue; | |
1653 | } | |
1654 | ||
4c37490d | 1655 | /* If update_dynamic_varobj_children returns false, then we have |
b6313243 | 1656 | a non-conforming pretty-printer, so we skip it. */ |
b926417a TT |
1657 | if (update_dynamic_varobj_children (v, &changed, &type_changed_vec, |
1658 | &newobj_vec, | |
1659 | &unchanged, &children_changed, | |
1660 | true, v->from, v->to)) | |
b6313243 | 1661 | { |
b926417a | 1662 | if (children_changed || !newobj_vec.empty ()) |
b6313243 | 1663 | { |
4c37490d | 1664 | r.children_changed = true; |
b926417a | 1665 | r.newobj = std::move (newobj_vec); |
b6313243 | 1666 | } |
0cc7d26f TT |
1667 | /* Push in reverse order so that the first child is |
1668 | popped from the work stack first, and so will be | |
1669 | added to result first. This does not affect | |
1670 | correctness, just "nicer". */ | |
b926417a | 1671 | for (int i = type_changed_vec.size () - 1; i >= 0; --i) |
8264ba82 | 1672 | { |
b926417a | 1673 | varobj_update_result item (type_changed_vec[i]); |
8264ba82 AG |
1674 | |
1675 | /* Type may change only if value was changed. */ | |
b926417a TT |
1676 | item.changed = true; |
1677 | item.type_changed = true; | |
1678 | item.value_installed = true; | |
0604393c | 1679 | |
b926417a | 1680 | stack.push_back (std::move (item)); |
8264ba82 | 1681 | } |
0604393c | 1682 | for (int i = changed.size () - 1; i >= 0; --i) |
b6313243 | 1683 | { |
b926417a | 1684 | varobj_update_result item (changed[i]); |
a109c7c1 | 1685 | |
b926417a TT |
1686 | item.changed = true; |
1687 | item.value_installed = true; | |
0604393c | 1688 | |
b926417a | 1689 | stack.push_back (std::move (item)); |
b6313243 | 1690 | } |
0604393c SM |
1691 | for (int i = unchanged.size () - 1; i >= 0; --i) |
1692 | { | |
1693 | if (!unchanged[i]->frozen) | |
1694 | { | |
b926417a | 1695 | varobj_update_result item (unchanged[i]); |
0604393c | 1696 | |
b926417a | 1697 | item.value_installed = true; |
0cc7d26f | 1698 | |
b926417a | 1699 | stack.push_back (std::move (item)); |
0604393c SM |
1700 | } |
1701 | } | |
1702 | if (r.changed || r.children_changed) | |
1703 | result.push_back (std::move (r)); | |
0cc7d26f | 1704 | |
b6313243 TT |
1705 | continue; |
1706 | } | |
1707 | } | |
28335dcc VP |
1708 | |
1709 | /* Push any children. Use reverse order so that the first | |
1710 | child is popped from the work stack first, and so | |
1711 | will be added to result first. This does not | |
1712 | affect correctness, just "nicer". */ | |
0604393c | 1713 | for (int i = v->children.size () - 1; i >= 0; --i) |
8b93c638 | 1714 | { |
ddf0ea08 | 1715 | varobj *c = v->children[i]; |
a109c7c1 | 1716 | |
28335dcc | 1717 | /* Child may be NULL if explicitly deleted by -var-delete. */ |
25d5ea92 | 1718 | if (c != NULL && !c->frozen) |
0604393c | 1719 | stack.emplace_back (c); |
8b93c638 | 1720 | } |
b6313243 TT |
1721 | |
1722 | if (r.changed || r.type_changed) | |
0604393c | 1723 | result.push_back (std::move (r)); |
8b93c638 JM |
1724 | } |
1725 | ||
f7f9ae2c | 1726 | return result; |
8b93c638 | 1727 | } |
8b93c638 JM |
1728 | |
1729 | /* Helper functions */ | |
1730 | ||
1731 | /* | |
1732 | * Variable object construction/destruction | |
1733 | */ | |
1734 | ||
1735 | static int | |
4c37490d | 1736 | delete_variable (struct varobj *var, bool only_children_p) |
8b93c638 JM |
1737 | { |
1738 | int delcount = 0; | |
1739 | ||
30914ca8 | 1740 | delete_variable_1 (&delcount, var, only_children_p, |
4c37490d | 1741 | true /* remove_from_parent_p */ ); |
8b93c638 JM |
1742 | |
1743 | return delcount; | |
1744 | } | |
1745 | ||
581e13c1 | 1746 | /* Delete the variable object VAR and its children. */ |
8b93c638 JM |
1747 | /* IMPORTANT NOTE: If we delete a variable which is a child |
1748 | and the parent is not removed we dump core. It must be always | |
581e13c1 | 1749 | initially called with remove_from_parent_p set. */ |
8b93c638 | 1750 | static void |
4c37490d SM |
1751 | delete_variable_1 (int *delcountp, struct varobj *var, bool only_children_p, |
1752 | bool remove_from_parent_p) | |
8b93c638 | 1753 | { |
581e13c1 | 1754 | /* Delete any children of this variable, too. */ |
ddf0ea08 | 1755 | for (varobj *child : var->children) |
28335dcc | 1756 | { |
214270ab VP |
1757 | if (!child) |
1758 | continue; | |
ddf0ea08 | 1759 | |
8b93c638 | 1760 | if (!remove_from_parent_p) |
28335dcc | 1761 | child->parent = NULL; |
ddf0ea08 | 1762 | |
4c37490d | 1763 | delete_variable_1 (delcountp, child, false, only_children_p); |
8b93c638 | 1764 | } |
ddf0ea08 | 1765 | var->children.clear (); |
8b93c638 | 1766 | |
581e13c1 | 1767 | /* if we were called to delete only the children we are done here. */ |
8b93c638 JM |
1768 | if (only_children_p) |
1769 | return; | |
1770 | ||
581e13c1 | 1771 | /* Otherwise, add it to the list of deleted ones and proceed to do so. */ |
2f408ecb | 1772 | /* If the name is empty, this is a temporary variable, that has not |
581e13c1 | 1773 | yet been installed, don't report it, it belongs to the caller... */ |
2f408ecb | 1774 | if (!var->obj_name.empty ()) |
8b93c638 | 1775 | { |
8b93c638 JM |
1776 | *delcountp = *delcountp + 1; |
1777 | } | |
1778 | ||
581e13c1 | 1779 | /* If this variable has a parent, remove it from its parent's list. */ |
8b93c638 JM |
1780 | /* OPTIMIZATION: if the parent of this variable is also being deleted, |
1781 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1782 | expensive list search to find the element to remove when we are | |
581e13c1 | 1783 | discarding the list afterwards. */ |
72330bd6 | 1784 | if ((remove_from_parent_p) && (var->parent != NULL)) |
ddf0ea08 | 1785 | var->parent->children[var->index] = NULL; |
72330bd6 | 1786 | |
2f408ecb | 1787 | if (!var->obj_name.empty ()) |
73a93a32 | 1788 | uninstall_variable (var); |
8b93c638 | 1789 | |
581e13c1 | 1790 | /* Free memory associated with this variable. */ |
9e5b9d2b | 1791 | delete var; |
8b93c638 JM |
1792 | } |
1793 | ||
581e13c1 | 1794 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ |
4c37490d | 1795 | static bool |
fba45db2 | 1796 | install_variable (struct varobj *var) |
8b93c638 JM |
1797 | { |
1798 | struct vlist *cv; | |
1799 | struct vlist *newvl; | |
1800 | const char *chp; | |
1801 | unsigned int index = 0; | |
1802 | unsigned int i = 1; | |
1803 | ||
2f408ecb | 1804 | for (chp = var->obj_name.c_str (); *chp; chp++) |
8b93c638 JM |
1805 | { |
1806 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1807 | } | |
1808 | ||
1809 | cv = *(varobj_table + index); | |
2f408ecb | 1810 | while (cv != NULL && cv->var->obj_name != var->obj_name) |
8b93c638 JM |
1811 | cv = cv->next; |
1812 | ||
1813 | if (cv != NULL) | |
8a3fe4f8 | 1814 | error (_("Duplicate variable object name")); |
8b93c638 | 1815 | |
581e13c1 | 1816 | /* Add varobj to hash table. */ |
8d749320 | 1817 | newvl = XNEW (struct vlist); |
8b93c638 JM |
1818 | newvl->next = *(varobj_table + index); |
1819 | newvl->var = var; | |
1820 | *(varobj_table + index) = newvl; | |
1821 | ||
581e13c1 | 1822 | /* If root, add varobj to root list. */ |
b2c2bd75 | 1823 | if (is_root_p (var)) |
8b93c638 | 1824 | { |
581e13c1 | 1825 | /* Add to list of root variables. */ |
8b93c638 JM |
1826 | if (rootlist == NULL) |
1827 | var->root->next = NULL; | |
1828 | else | |
1829 | var->root->next = rootlist; | |
1830 | rootlist = var->root; | |
8b93c638 JM |
1831 | } |
1832 | ||
4c37490d | 1833 | return true; /* OK */ |
8b93c638 JM |
1834 | } |
1835 | ||
581e13c1 | 1836 | /* Unistall the object VAR. */ |
8b93c638 | 1837 | static void |
fba45db2 | 1838 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1839 | { |
1840 | struct vlist *cv; | |
1841 | struct vlist *prev; | |
1842 | struct varobj_root *cr; | |
1843 | struct varobj_root *prer; | |
1844 | const char *chp; | |
1845 | unsigned int index = 0; | |
1846 | unsigned int i = 1; | |
1847 | ||
581e13c1 | 1848 | /* Remove varobj from hash table. */ |
2f408ecb | 1849 | for (chp = var->obj_name.c_str (); *chp; chp++) |
8b93c638 JM |
1850 | { |
1851 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1852 | } | |
1853 | ||
1854 | cv = *(varobj_table + index); | |
1855 | prev = NULL; | |
2f408ecb | 1856 | while (cv != NULL && cv->var->obj_name != var->obj_name) |
8b93c638 JM |
1857 | { |
1858 | prev = cv; | |
1859 | cv = cv->next; | |
1860 | } | |
1861 | ||
1862 | if (varobjdebug) | |
2f408ecb | 1863 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name.c_str ()); |
8b93c638 JM |
1864 | |
1865 | if (cv == NULL) | |
1866 | { | |
72330bd6 AC |
1867 | warning |
1868 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
2f408ecb | 1869 | var->obj_name.c_str ()); |
8b93c638 JM |
1870 | return; |
1871 | } | |
1872 | ||
1873 | if (prev == NULL) | |
1874 | *(varobj_table + index) = cv->next; | |
1875 | else | |
1876 | prev->next = cv->next; | |
1877 | ||
b8c9b27d | 1878 | xfree (cv); |
8b93c638 | 1879 | |
581e13c1 | 1880 | /* If root, remove varobj from root list. */ |
b2c2bd75 | 1881 | if (is_root_p (var)) |
8b93c638 | 1882 | { |
581e13c1 | 1883 | /* Remove from list of root variables. */ |
8b93c638 JM |
1884 | if (rootlist == var->root) |
1885 | rootlist = var->root->next; | |
1886 | else | |
1887 | { | |
1888 | prer = NULL; | |
1889 | cr = rootlist; | |
1890 | while ((cr != NULL) && (cr->rootvar != var)) | |
1891 | { | |
1892 | prer = cr; | |
1893 | cr = cr->next; | |
1894 | } | |
1895 | if (cr == NULL) | |
1896 | { | |
8f7e195f JB |
1897 | warning (_("Assertion failed: Could not find " |
1898 | "varobj \"%s\" in root list"), | |
2f408ecb | 1899 | var->obj_name.c_str ()); |
8b93c638 JM |
1900 | return; |
1901 | } | |
1902 | if (prer == NULL) | |
1903 | rootlist = NULL; | |
1904 | else | |
1905 | prer->next = cr->next; | |
1906 | } | |
8b93c638 JM |
1907 | } |
1908 | ||
1909 | } | |
1910 | ||
837ce252 SM |
1911 | /* Create and install a child of the parent of the given name. |
1912 | ||
1913 | The created VAROBJ takes ownership of the allocated NAME. */ | |
1914 | ||
8b93c638 | 1915 | static struct varobj * |
2f408ecb | 1916 | create_child (struct varobj *parent, int index, std::string &name) |
b6313243 | 1917 | { |
5a2e0d6e YQ |
1918 | struct varobj_item item; |
1919 | ||
2f408ecb | 1920 | std::swap (item.name, name); |
5a2e0d6e YQ |
1921 | item.value = value_of_child (parent, index); |
1922 | ||
1923 | return create_child_with_value (parent, index, &item); | |
b6313243 TT |
1924 | } |
1925 | ||
1926 | static struct varobj * | |
5a2e0d6e YQ |
1927 | create_child_with_value (struct varobj *parent, int index, |
1928 | struct varobj_item *item) | |
8b93c638 | 1929 | { |
9e5b9d2b | 1930 | varobj *child = new varobj (parent->root); |
8b93c638 | 1931 | |
5e5ac9a5 | 1932 | /* NAME is allocated by caller. */ |
2f408ecb | 1933 | std::swap (child->name, item->name); |
8b93c638 | 1934 | child->index = index; |
8b93c638 | 1935 | child->parent = parent; |
85254831 | 1936 | |
99ad9427 | 1937 | if (varobj_is_anonymous_child (child)) |
2f408ecb PA |
1938 | child->obj_name = string_printf ("%s.%d_anonymous", |
1939 | parent->obj_name.c_str (), index); | |
85254831 | 1940 | else |
2f408ecb PA |
1941 | child->obj_name = string_printf ("%s.%s", |
1942 | parent->obj_name.c_str (), | |
1943 | child->name.c_str ()); | |
85254831 | 1944 | |
8b93c638 JM |
1945 | install_variable (child); |
1946 | ||
acd65feb VP |
1947 | /* Compute the type of the child. Must do this before |
1948 | calling install_new_value. */ | |
5a2e0d6e | 1949 | if (item->value != NULL) |
acd65feb | 1950 | /* If the child had no evaluation errors, var->value |
581e13c1 | 1951 | will be non-NULL and contain a valid type. */ |
5a2e0d6e | 1952 | child->type = value_actual_type (item->value, 0, NULL); |
acd65feb | 1953 | else |
581e13c1 | 1954 | /* Otherwise, we must compute the type. */ |
ca20d462 YQ |
1955 | child->type = (*child->root->lang_ops->type_of_child) (child->parent, |
1956 | child->index); | |
5a2e0d6e | 1957 | install_new_value (child, item->value, 1); |
acd65feb | 1958 | |
8b93c638 JM |
1959 | return child; |
1960 | } | |
8b93c638 JM |
1961 | \f |
1962 | ||
1963 | /* | |
1964 | * Miscellaneous utility functions. | |
1965 | */ | |
1966 | ||
581e13c1 | 1967 | /* Allocate memory and initialize a new variable. */ |
9e5b9d2b SM |
1968 | varobj::varobj (varobj_root *root_) |
1969 | : root (root_), dynamic (new varobj_dynamic) | |
8b93c638 | 1970 | { |
8b93c638 JM |
1971 | } |
1972 | ||
581e13c1 | 1973 | /* Free any allocated memory associated with VAR. */ |
9e5b9d2b SM |
1974 | |
1975 | varobj::~varobj () | |
8b93c638 | 1976 | { |
9e5b9d2b SM |
1977 | varobj *var = this; |
1978 | ||
d452c4bc | 1979 | #if HAVE_PYTHON |
bb5ce47a | 1980 | if (var->dynamic->pretty_printer != NULL) |
d452c4bc | 1981 | { |
bde7b3e3 | 1982 | gdbpy_enter_varobj enter_py (var); |
bb5ce47a YQ |
1983 | |
1984 | Py_XDECREF (var->dynamic->constructor); | |
1985 | Py_XDECREF (var->dynamic->pretty_printer); | |
d452c4bc UW |
1986 | } |
1987 | #endif | |
1988 | ||
827f100c YQ |
1989 | varobj_iter_delete (var->dynamic->child_iter); |
1990 | varobj_clear_saved_item (var->dynamic); | |
36746093 | 1991 | |
b2c2bd75 | 1992 | if (is_root_p (var)) |
4d01a485 | 1993 | delete var->root; |
8b93c638 | 1994 | |
9e5b9d2b | 1995 | delete var->dynamic; |
74b7792f AC |
1996 | } |
1997 | ||
6e2a9270 VP |
1998 | /* Return the type of the value that's stored in VAR, |
1999 | or that would have being stored there if the | |
581e13c1 | 2000 | value were accessible. |
6e2a9270 VP |
2001 | |
2002 | This differs from VAR->type in that VAR->type is always | |
2003 | the true type of the expession in the source language. | |
2004 | The return value of this function is the type we're | |
2005 | actually storing in varobj, and using for displaying | |
2006 | the values and for comparing previous and new values. | |
2007 | ||
2008 | For example, top-level references are always stripped. */ | |
99ad9427 | 2009 | struct type * |
b09e2c59 | 2010 | varobj_get_value_type (const struct varobj *var) |
6e2a9270 VP |
2011 | { |
2012 | struct type *type; | |
2013 | ||
b4d61099 TT |
2014 | if (var->value != nullptr) |
2015 | type = value_type (var->value.get ()); | |
6e2a9270 VP |
2016 | else |
2017 | type = var->type; | |
2018 | ||
2019 | type = check_typedef (type); | |
2020 | ||
aa006118 | 2021 | if (TYPE_IS_REFERENCE (type)) |
6e2a9270 VP |
2022 | type = get_target_type (type); |
2023 | ||
2024 | type = check_typedef (type); | |
2025 | ||
2026 | return type; | |
2027 | } | |
2028 | ||
8b93c638 | 2029 | /* What is the default display for this variable? We assume that |
581e13c1 | 2030 | everything is "natural". Any exceptions? */ |
8b93c638 | 2031 | static enum varobj_display_formats |
fba45db2 | 2032 | variable_default_display (struct varobj *var) |
8b93c638 JM |
2033 | { |
2034 | return FORMAT_NATURAL; | |
2035 | } | |
2036 | ||
8b93c638 JM |
2037 | /* |
2038 | * Language-dependencies | |
2039 | */ | |
2040 | ||
2041 | /* Common entry points */ | |
2042 | ||
8b93c638 JM |
2043 | /* Return the number of children for a given variable. |
2044 | The result of this function is defined by the language | |
581e13c1 | 2045 | implementation. The number of children returned by this function |
8b93c638 | 2046 | is the number of children that the user will see in the variable |
581e13c1 | 2047 | display. */ |
8b93c638 | 2048 | static int |
b09e2c59 | 2049 | number_of_children (const struct varobj *var) |
8b93c638 | 2050 | { |
ca20d462 | 2051 | return (*var->root->lang_ops->number_of_children) (var); |
8b93c638 JM |
2052 | } |
2053 | ||
2f408ecb PA |
2054 | /* What is the expression for the root varobj VAR? */ |
2055 | ||
2056 | static std::string | |
b09e2c59 | 2057 | name_of_variable (const struct varobj *var) |
8b93c638 | 2058 | { |
ca20d462 | 2059 | return (*var->root->lang_ops->name_of_variable) (var); |
8b93c638 JM |
2060 | } |
2061 | ||
2f408ecb PA |
2062 | /* What is the name of the INDEX'th child of VAR? */ |
2063 | ||
2064 | static std::string | |
fba45db2 | 2065 | name_of_child (struct varobj *var, int index) |
8b93c638 | 2066 | { |
ca20d462 | 2067 | return (*var->root->lang_ops->name_of_child) (var, index); |
8b93c638 JM |
2068 | } |
2069 | ||
2213e2be | 2070 | /* If frame associated with VAR can be found, switch |
4c37490d | 2071 | to it and return true. Otherwise, return false. */ |
2213e2be | 2072 | |
4c37490d | 2073 | static bool |
b09e2c59 | 2074 | check_scope (const struct varobj *var) |
2213e2be YQ |
2075 | { |
2076 | struct frame_info *fi; | |
4c37490d | 2077 | bool scope; |
2213e2be YQ |
2078 | |
2079 | fi = frame_find_by_id (var->root->frame); | |
2080 | scope = fi != NULL; | |
2081 | ||
2082 | if (fi) | |
2083 | { | |
2084 | CORE_ADDR pc = get_frame_pc (fi); | |
2085 | ||
2086 | if (pc < BLOCK_START (var->root->valid_block) || | |
2087 | pc >= BLOCK_END (var->root->valid_block)) | |
4c37490d | 2088 | scope = false; |
2213e2be YQ |
2089 | else |
2090 | select_frame (fi); | |
2091 | } | |
2092 | return scope; | |
2093 | } | |
2094 | ||
2095 | /* Helper function to value_of_root. */ | |
2096 | ||
2097 | static struct value * | |
2098 | value_of_root_1 (struct varobj **var_handle) | |
2099 | { | |
2100 | struct value *new_val = NULL; | |
2101 | struct varobj *var = *var_handle; | |
4c37490d | 2102 | bool within_scope = false; |
2213e2be YQ |
2103 | |
2104 | /* Only root variables can be updated... */ | |
2105 | if (!is_root_p (var)) | |
2106 | /* Not a root var. */ | |
2107 | return NULL; | |
2108 | ||
5ed8105e | 2109 | scoped_restore_current_thread restore_thread; |
2213e2be YQ |
2110 | |
2111 | /* Determine whether the variable is still around. */ | |
2112 | if (var->root->valid_block == NULL || var->root->floating) | |
4c37490d | 2113 | within_scope = true; |
2213e2be YQ |
2114 | else if (var->root->thread_id == 0) |
2115 | { | |
2116 | /* The program was single-threaded when the variable object was | |
2117 | created. Technically, it's possible that the program became | |
2118 | multi-threaded since then, but we don't support such | |
2119 | scenario yet. */ | |
2120 | within_scope = check_scope (var); | |
2121 | } | |
2122 | else | |
2123 | { | |
00431a78 | 2124 | thread_info *thread = find_thread_global_id (var->root->thread_id); |
5d5658a1 | 2125 | |
00431a78 | 2126 | if (thread != NULL) |
2213e2be | 2127 | { |
00431a78 | 2128 | switch_to_thread (thread); |
2213e2be YQ |
2129 | within_scope = check_scope (var); |
2130 | } | |
2131 | } | |
2132 | ||
2133 | if (within_scope) | |
2134 | { | |
2213e2be YQ |
2135 | |
2136 | /* We need to catch errors here, because if evaluate | |
2137 | expression fails we want to just return NULL. */ | |
a70b8144 | 2138 | try |
2213e2be | 2139 | { |
4d01a485 | 2140 | new_val = evaluate_expression (var->root->exp.get ()); |
2213e2be | 2141 | } |
230d2906 | 2142 | catch (const gdb_exception_error &except) |
492d29ea PA |
2143 | { |
2144 | } | |
2213e2be YQ |
2145 | } |
2146 | ||
2213e2be YQ |
2147 | return new_val; |
2148 | } | |
2149 | ||
a5defcdc VP |
2150 | /* What is the ``struct value *'' of the root variable VAR? |
2151 | For floating variable object, evaluation can get us a value | |
2152 | of different type from what is stored in varobj already. In | |
2153 | that case: | |
2154 | - *type_changed will be set to 1 | |
2155 | - old varobj will be freed, and new one will be | |
2156 | created, with the same name. | |
2157 | - *var_handle will be set to the new varobj | |
2158 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 2159 | static struct value * |
4c37490d | 2160 | value_of_root (struct varobj **var_handle, bool *type_changed) |
8b93c638 | 2161 | { |
73a93a32 JI |
2162 | struct varobj *var; |
2163 | ||
2164 | if (var_handle == NULL) | |
2165 | return NULL; | |
2166 | ||
2167 | var = *var_handle; | |
2168 | ||
2169 | /* This should really be an exception, since this should | |
581e13c1 | 2170 | only get called with a root variable. */ |
73a93a32 | 2171 | |
b2c2bd75 | 2172 | if (!is_root_p (var)) |
73a93a32 JI |
2173 | return NULL; |
2174 | ||
a5defcdc | 2175 | if (var->root->floating) |
73a93a32 JI |
2176 | { |
2177 | struct varobj *tmp_var; | |
6225abfa | 2178 | |
2f408ecb | 2179 | tmp_var = varobj_create (NULL, var->name.c_str (), (CORE_ADDR) 0, |
73a93a32 JI |
2180 | USE_SELECTED_FRAME); |
2181 | if (tmp_var == NULL) | |
2182 | { | |
2183 | return NULL; | |
2184 | } | |
2f408ecb PA |
2185 | std::string old_type = varobj_get_type (var); |
2186 | std::string new_type = varobj_get_type (tmp_var); | |
2187 | if (old_type == new_type) | |
73a93a32 | 2188 | { |
fcacd99f VP |
2189 | /* The expression presently stored inside var->root->exp |
2190 | remembers the locations of local variables relatively to | |
2191 | the frame where the expression was created (in DWARF location | |
2192 | button, for example). Naturally, those locations are not | |
2193 | correct in other frames, so update the expression. */ | |
2194 | ||
4d01a485 | 2195 | std::swap (var->root->exp, tmp_var->root->exp); |
fcacd99f | 2196 | |
30914ca8 | 2197 | varobj_delete (tmp_var, 0); |
73a93a32 JI |
2198 | *type_changed = 0; |
2199 | } | |
2200 | else | |
2201 | { | |
2f408ecb | 2202 | tmp_var->obj_name = var->obj_name; |
0cc7d26f TT |
2203 | tmp_var->from = var->from; |
2204 | tmp_var->to = var->to; | |
30914ca8 | 2205 | varobj_delete (var, 0); |
a5defcdc | 2206 | |
73a93a32 JI |
2207 | install_variable (tmp_var); |
2208 | *var_handle = tmp_var; | |
705da579 | 2209 | var = *var_handle; |
4c37490d | 2210 | *type_changed = true; |
73a93a32 JI |
2211 | } |
2212 | } | |
2213 | else | |
2214 | { | |
2215 | *type_changed = 0; | |
2216 | } | |
2217 | ||
7a290c40 JB |
2218 | { |
2219 | struct value *value; | |
2220 | ||
2213e2be | 2221 | value = value_of_root_1 (var_handle); |
7a290c40 JB |
2222 | if (var->value == NULL || value == NULL) |
2223 | { | |
2224 | /* For root varobj-s, a NULL value indicates a scoping issue. | |
2225 | So, nothing to do in terms of checking for mutations. */ | |
2226 | } | |
2227 | else if (varobj_value_has_mutated (var, value, value_type (value))) | |
2228 | { | |
2229 | /* The type has mutated, so the children are no longer valid. | |
2230 | Just delete them, and tell our caller that the type has | |
2231 | changed. */ | |
30914ca8 | 2232 | varobj_delete (var, 1 /* only_children */); |
7a290c40 JB |
2233 | var->num_children = -1; |
2234 | var->to = -1; | |
2235 | var->from = -1; | |
4c37490d | 2236 | *type_changed = true; |
7a290c40 JB |
2237 | } |
2238 | return value; | |
2239 | } | |
8b93c638 JM |
2240 | } |
2241 | ||
581e13c1 | 2242 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
30b28db1 | 2243 | static struct value * |
c1cc6152 | 2244 | value_of_child (const struct varobj *parent, int index) |
8b93c638 | 2245 | { |
30b28db1 | 2246 | struct value *value; |
8b93c638 | 2247 | |
ca20d462 | 2248 | value = (*parent->root->lang_ops->value_of_child) (parent, index); |
8b93c638 | 2249 | |
8b93c638 JM |
2250 | return value; |
2251 | } | |
2252 | ||
581e13c1 | 2253 | /* GDB already has a command called "value_of_variable". Sigh. */ |
2f408ecb | 2254 | static std::string |
de051565 | 2255 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2256 | { |
8756216b | 2257 | if (var->root->is_valid) |
0cc7d26f | 2258 | { |
bb5ce47a | 2259 | if (var->dynamic->pretty_printer != NULL) |
b4d61099 TT |
2260 | return varobj_value_get_print_value (var->value.get (), var->format, |
2261 | var); | |
ca20d462 | 2262 | return (*var->root->lang_ops->value_of_variable) (var, format); |
0cc7d26f | 2263 | } |
8756216b | 2264 | else |
2f408ecb | 2265 | return std::string (); |
8b93c638 JM |
2266 | } |
2267 | ||
99ad9427 YQ |
2268 | void |
2269 | varobj_formatted_print_options (struct value_print_options *opts, | |
2270 | enum varobj_display_formats format) | |
2271 | { | |
2272 | get_formatted_print_options (opts, format_code[(int) format]); | |
2273 | opts->deref_ref = 0; | |
0625771b | 2274 | opts->raw = !pretty_printing; |
99ad9427 YQ |
2275 | } |
2276 | ||
2f408ecb | 2277 | std::string |
99ad9427 YQ |
2278 | varobj_value_get_print_value (struct value *value, |
2279 | enum varobj_display_formats format, | |
b09e2c59 | 2280 | const struct varobj *var) |
85265413 | 2281 | { |
79a45b7d | 2282 | struct value_print_options opts; |
be759fcf PM |
2283 | struct type *type = NULL; |
2284 | long len = 0; | |
1eba6383 | 2285 | gdb::unique_xmalloc_ptr<char> encoding; |
3a182a69 JK |
2286 | /* Initialize it just to avoid a GCC false warning. */ |
2287 | CORE_ADDR str_addr = 0; | |
4c37490d | 2288 | bool string_print = false; |
57e66780 DJ |
2289 | |
2290 | if (value == NULL) | |
2f408ecb | 2291 | return std::string (); |
57e66780 | 2292 | |
d7e74731 | 2293 | string_file stb; |
2f408ecb PA |
2294 | std::string thevalue; |
2295 | ||
b6313243 | 2296 | #if HAVE_PYTHON |
0646da15 TT |
2297 | if (gdb_python_initialized) |
2298 | { | |
bb5ce47a | 2299 | PyObject *value_formatter = var->dynamic->pretty_printer; |
d452c4bc | 2300 | |
68cdc557 | 2301 | gdbpy_enter_varobj enter_py (var); |
09ca9e2e | 2302 | |
0646da15 TT |
2303 | if (value_formatter) |
2304 | { | |
2305 | /* First check to see if we have any children at all. If so, | |
2306 | we simply return {...}. */ | |
2307 | if (dynamic_varobj_has_child_method (var)) | |
d7e74731 | 2308 | return "{...}"; |
b6313243 | 2309 | |
0646da15 TT |
2310 | if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst)) |
2311 | { | |
2312 | struct value *replacement; | |
0646da15 | 2313 | |
a5c5eda7 SM |
2314 | gdbpy_ref<> output = apply_varobj_pretty_printer (value_formatter, |
2315 | &replacement, | |
2316 | &stb); | |
0646da15 TT |
2317 | |
2318 | /* If we have string like output ... */ | |
68cdc557 | 2319 | if (output != NULL) |
0646da15 | 2320 | { |
0646da15 TT |
2321 | /* If this is a lazy string, extract it. For lazy |
2322 | strings we always print as a string, so set | |
2323 | string_print. */ | |
68cdc557 | 2324 | if (gdbpy_is_lazy_string (output.get ())) |
0646da15 | 2325 | { |
68cdc557 TT |
2326 | gdbpy_extract_lazy_string (output.get (), &str_addr, |
2327 | &type, &len, &encoding); | |
4c37490d | 2328 | string_print = true; |
0646da15 TT |
2329 | } |
2330 | else | |
2331 | { | |
2332 | /* If it is a regular (non-lazy) string, extract | |
2333 | it and copy the contents into THEVALUE. If the | |
2334 | hint says to print it as a string, set | |
2335 | string_print. Otherwise just return the extracted | |
2336 | string as a value. */ | |
2337 | ||
9b972014 | 2338 | gdb::unique_xmalloc_ptr<char> s |
68cdc557 | 2339 | = python_string_to_target_string (output.get ()); |
0646da15 TT |
2340 | |
2341 | if (s) | |
2342 | { | |
e3821cca | 2343 | struct gdbarch *gdbarch; |
0646da15 | 2344 | |
9b972014 TT |
2345 | gdb::unique_xmalloc_ptr<char> hint |
2346 | = gdbpy_get_display_hint (value_formatter); | |
0646da15 TT |
2347 | if (hint) |
2348 | { | |
9b972014 | 2349 | if (!strcmp (hint.get (), "string")) |
4c37490d | 2350 | string_print = true; |
0646da15 TT |
2351 | } |
2352 | ||
9b972014 | 2353 | thevalue = std::string (s.get ()); |
2f408ecb | 2354 | len = thevalue.size (); |
e3821cca | 2355 | gdbarch = get_type_arch (value_type (value)); |
0646da15 | 2356 | type = builtin_type (gdbarch)->builtin_char; |
0646da15 TT |
2357 | |
2358 | if (!string_print) | |
d7e74731 | 2359 | return thevalue; |
0646da15 TT |
2360 | } |
2361 | else | |
2362 | gdbpy_print_stack (); | |
2363 | } | |
2364 | } | |
2365 | /* If the printer returned a replacement value, set VALUE | |
2366 | to REPLACEMENT. If there is not a replacement value, | |
2367 | just use the value passed to this function. */ | |
2368 | if (replacement) | |
2369 | value = replacement; | |
2370 | } | |
2371 | } | |
2372 | } | |
b6313243 TT |
2373 | #endif |
2374 | ||
99ad9427 | 2375 | varobj_formatted_print_options (&opts, format); |
00bd41d6 PM |
2376 | |
2377 | /* If the THEVALUE has contents, it is a regular string. */ | |
2f408ecb | 2378 | if (!thevalue.empty ()) |
d7e74731 | 2379 | LA_PRINT_STRING (&stb, type, (gdb_byte *) thevalue.c_str (), |
1eba6383 | 2380 | len, encoding.get (), 0, &opts); |
09ca9e2e | 2381 | else if (string_print) |
00bd41d6 PM |
2382 | /* Otherwise, if string_print is set, and it is not a regular |
2383 | string, it is a lazy string. */ | |
d7e74731 | 2384 | val_print_string (type, encoding.get (), str_addr, len, &stb, &opts); |
b6313243 | 2385 | else |
00bd41d6 | 2386 | /* All other cases. */ |
d7e74731 | 2387 | common_val_print (value, &stb, 0, &opts, current_language); |
57e66780 | 2388 | |
d7e74731 | 2389 | return std::move (stb.string ()); |
85265413 NR |
2390 | } |
2391 | ||
4c37490d | 2392 | bool |
b09e2c59 | 2393 | varobj_editable_p (const struct varobj *var) |
340a7723 NR |
2394 | { |
2395 | struct type *type; | |
340a7723 | 2396 | |
b4d61099 TT |
2397 | if (!(var->root->is_valid && var->value != nullptr |
2398 | && VALUE_LVAL (var->value.get ()))) | |
4c37490d | 2399 | return false; |
340a7723 | 2400 | |
99ad9427 | 2401 | type = varobj_get_value_type (var); |
340a7723 NR |
2402 | |
2403 | switch (TYPE_CODE (type)) | |
2404 | { | |
2405 | case TYPE_CODE_STRUCT: | |
2406 | case TYPE_CODE_UNION: | |
2407 | case TYPE_CODE_ARRAY: | |
2408 | case TYPE_CODE_FUNC: | |
2409 | case TYPE_CODE_METHOD: | |
4c37490d | 2410 | return false; |
340a7723 NR |
2411 | break; |
2412 | ||
2413 | default: | |
4c37490d | 2414 | return true; |
340a7723 NR |
2415 | break; |
2416 | } | |
2417 | } | |
2418 | ||
d32cafc7 | 2419 | /* Call VAR's value_is_changeable_p language-specific callback. */ |
acd65feb | 2420 | |
4c37490d | 2421 | bool |
b09e2c59 | 2422 | varobj_value_is_changeable_p (const struct varobj *var) |
8b93c638 | 2423 | { |
ca20d462 | 2424 | return var->root->lang_ops->value_is_changeable_p (var); |
8b93c638 JM |
2425 | } |
2426 | ||
4c37490d | 2427 | /* Return true if that varobj is floating, that is is always evaluated in the |
5a413362 VP |
2428 | selected frame, and not bound to thread/frame. Such variable objects |
2429 | are created using '@' as frame specifier to -var-create. */ | |
4c37490d | 2430 | bool |
b09e2c59 | 2431 | varobj_floating_p (const struct varobj *var) |
5a413362 VP |
2432 | { |
2433 | return var->root->floating; | |
2434 | } | |
2435 | ||
d32cafc7 JB |
2436 | /* Implement the "value_is_changeable_p" varobj callback for most |
2437 | languages. */ | |
2438 | ||
4c37490d | 2439 | bool |
b09e2c59 | 2440 | varobj_default_value_is_changeable_p (const struct varobj *var) |
d32cafc7 | 2441 | { |
4c37490d | 2442 | bool r; |
d32cafc7 JB |
2443 | struct type *type; |
2444 | ||
2445 | if (CPLUS_FAKE_CHILD (var)) | |
4c37490d | 2446 | return false; |
d32cafc7 | 2447 | |
99ad9427 | 2448 | type = varobj_get_value_type (var); |
d32cafc7 JB |
2449 | |
2450 | switch (TYPE_CODE (type)) | |
2451 | { | |
2452 | case TYPE_CODE_STRUCT: | |
2453 | case TYPE_CODE_UNION: | |
2454 | case TYPE_CODE_ARRAY: | |
4c37490d | 2455 | r = false; |
d32cafc7 JB |
2456 | break; |
2457 | ||
2458 | default: | |
4c37490d | 2459 | r = true; |
d32cafc7 JB |
2460 | } |
2461 | ||
2462 | return r; | |
2463 | } | |
2464 | ||
54333c3b JK |
2465 | /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them |
2466 | with an arbitrary caller supplied DATA pointer. */ | |
2467 | ||
2468 | void | |
2469 | all_root_varobjs (void (*func) (struct varobj *var, void *data), void *data) | |
2470 | { | |
2471 | struct varobj_root *var_root, *var_root_next; | |
2472 | ||
2473 | /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */ | |
2474 | ||
2475 | for (var_root = rootlist; var_root != NULL; var_root = var_root_next) | |
2476 | { | |
2477 | var_root_next = var_root->next; | |
2478 | ||
2479 | (*func) (var_root->rootvar, data); | |
2480 | } | |
2481 | } | |
8756216b | 2482 | |
54333c3b | 2483 | /* Invalidate varobj VAR if it is tied to locals and re-create it if it is |
4e969b4f AB |
2484 | defined on globals. It is a helper for varobj_invalidate. |
2485 | ||
2486 | This function is called after changing the symbol file, in this case the | |
2487 | pointers to "struct type" stored by the varobj are no longer valid. All | |
2488 | varobj must be either re-evaluated, or marked as invalid here. */ | |
2dbd25e5 | 2489 | |
54333c3b JK |
2490 | static void |
2491 | varobj_invalidate_iter (struct varobj *var, void *unused) | |
8756216b | 2492 | { |
4e969b4f AB |
2493 | /* global and floating var must be re-evaluated. */ |
2494 | if (var->root->floating || var->root->valid_block == NULL) | |
2dbd25e5 | 2495 | { |
54333c3b | 2496 | struct varobj *tmp_var; |
2dbd25e5 | 2497 | |
54333c3b JK |
2498 | /* Try to create a varobj with same expression. If we succeed |
2499 | replace the old varobj, otherwise invalidate it. */ | |
2f408ecb | 2500 | tmp_var = varobj_create (NULL, var->name.c_str (), (CORE_ADDR) 0, |
54333c3b JK |
2501 | USE_CURRENT_FRAME); |
2502 | if (tmp_var != NULL) | |
2503 | { | |
2f408ecb | 2504 | tmp_var->obj_name = var->obj_name; |
30914ca8 | 2505 | varobj_delete (var, 0); |
54333c3b | 2506 | install_variable (tmp_var); |
2dbd25e5 | 2507 | } |
54333c3b | 2508 | else |
4c37490d | 2509 | var->root->is_valid = false; |
2dbd25e5 | 2510 | } |
54333c3b | 2511 | else /* locals must be invalidated. */ |
4c37490d | 2512 | var->root->is_valid = false; |
54333c3b JK |
2513 | } |
2514 | ||
2515 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2516 | are defined on globals. | |
2517 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2518 | ||
2519 | void | |
2520 | varobj_invalidate (void) | |
2521 | { | |
2522 | all_root_varobjs (varobj_invalidate_iter, NULL); | |
8756216b | 2523 | } |
481695ed | 2524 | |
1c3569d4 MR |
2525 | void |
2526 | _initialize_varobj (void) | |
2527 | { | |
8d749320 | 2528 | varobj_table = XCNEWVEC (struct vlist *, VAROBJ_TABLE_SIZE); |
1c3569d4 MR |
2529 | |
2530 | add_setshow_zuinteger_cmd ("varobj", class_maintenance, | |
2531 | &varobjdebug, | |
2532 | _("Set varobj debugging."), | |
2533 | _("Show varobj debugging."), | |
2534 | _("When non-zero, varobj debugging is enabled."), | |
2535 | NULL, show_varobjdebug, | |
2536 | &setdebuglist, &showdebuglist); | |
2537 | } |