Commit | Line | Data |
---|---|---|
8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
8acc9f48 | 3 | Copyright (C) 1999-2013 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" | |
a6c442d8 | 19 | #include "exceptions.h" |
8b93c638 JM |
20 | #include "value.h" |
21 | #include "expression.h" | |
22 | #include "frame.h" | |
8b93c638 | 23 | #include "language.h" |
8b93c638 | 24 | #include "gdbcmd.h" |
d2353924 | 25 | #include "block.h" |
79a45b7d | 26 | #include "valprint.h" |
a6c442d8 MK |
27 | |
28 | #include "gdb_assert.h" | |
b66d6d2e | 29 | #include "gdb_string.h" |
0cc7d26f | 30 | #include "gdb_regex.h" |
8b93c638 JM |
31 | |
32 | #include "varobj.h" | |
28335dcc | 33 | #include "vec.h" |
6208b47d VP |
34 | #include "gdbthread.h" |
35 | #include "inferior.h" | |
8b93c638 | 36 | |
b6313243 TT |
37 | #if HAVE_PYTHON |
38 | #include "python/python.h" | |
39 | #include "python/python-internal.h" | |
50389644 PA |
40 | #else |
41 | typedef int PyObject; | |
b6313243 TT |
42 | #endif |
43 | ||
8b93c638 JM |
44 | /* Non-zero if we want to see trace of varobj level stuff. */ |
45 | ||
ccce17b0 | 46 | unsigned int varobjdebug = 0; |
920d2a44 AC |
47 | static void |
48 | show_varobjdebug (struct ui_file *file, int from_tty, | |
49 | struct cmd_list_element *c, const char *value) | |
50 | { | |
51 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
52 | } | |
8b93c638 | 53 | |
581e13c1 | 54 | /* String representations of gdb's format codes. */ |
8b93c638 | 55 | char *varobj_format_string[] = |
72330bd6 | 56 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 | 57 | |
581e13c1 | 58 | /* String representations of gdb's known languages. */ |
c573f273 | 59 | char *varobj_language_string[] = { "C", "C++", "Java" }; |
8b93c638 | 60 | |
0cc7d26f TT |
61 | /* True if we want to allow Python-based pretty-printing. */ |
62 | static int pretty_printing = 0; | |
63 | ||
64 | void | |
65 | varobj_enable_pretty_printing (void) | |
66 | { | |
67 | pretty_printing = 1; | |
68 | } | |
69 | ||
8b93c638 JM |
70 | /* Data structures */ |
71 | ||
72 | /* Every root variable has one of these structures saved in its | |
581e13c1 | 73 | varobj. Members which must be free'd are noted. */ |
8b93c638 | 74 | struct varobj_root |
72330bd6 | 75 | { |
8b93c638 | 76 | |
581e13c1 | 77 | /* Alloc'd expression for this parent. */ |
72330bd6 | 78 | struct expression *exp; |
8b93c638 | 79 | |
581e13c1 | 80 | /* Block for which this expression is valid. */ |
270140bd | 81 | const struct block *valid_block; |
8b93c638 | 82 | |
44a67aa7 VP |
83 | /* The frame for this expression. This field is set iff valid_block is |
84 | not NULL. */ | |
e64d9b3d | 85 | struct frame_id frame; |
8b93c638 | 86 | |
c5b48eac | 87 | /* The thread ID that this varobj_root belong to. This field |
581e13c1 | 88 | is only valid if valid_block is not NULL. |
c5b48eac VP |
89 | When not 0, indicates which thread 'frame' belongs to. |
90 | When 0, indicates that the thread list was empty when the varobj_root | |
91 | was created. */ | |
92 | int thread_id; | |
93 | ||
a5defcdc VP |
94 | /* If 1, the -var-update always recomputes the value in the |
95 | current thread and frame. Otherwise, variable object is | |
581e13c1 | 96 | always updated in the specific scope/thread/frame. */ |
a5defcdc | 97 | int floating; |
73a93a32 | 98 | |
8756216b DP |
99 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
100 | to symbols that do not exist anymore. */ | |
101 | int is_valid; | |
102 | ||
99ad9427 YQ |
103 | /* Language-related operations for this variable and its |
104 | children. */ | |
ca20d462 | 105 | const struct lang_varobj_ops *lang_ops; |
8b93c638 | 106 | |
581e13c1 | 107 | /* The varobj for this root node. */ |
72330bd6 | 108 | struct varobj *rootvar; |
8b93c638 | 109 | |
72330bd6 AC |
110 | /* Next root variable */ |
111 | struct varobj_root *next; | |
112 | }; | |
8b93c638 | 113 | |
bb5ce47a | 114 | /* Dynamic part of varobj. */ |
8b93c638 | 115 | |
bb5ce47a YQ |
116 | struct varobj_dynamic |
117 | { | |
b6313243 TT |
118 | /* Whether the children of this varobj were requested. This field is |
119 | used to decide if dynamic varobj should recompute their children. | |
120 | In the event that the frontend never asked for the children, we | |
121 | can avoid that. */ | |
122 | int children_requested; | |
123 | ||
0cc7d26f TT |
124 | /* The pretty-printer constructor. If NULL, then the default |
125 | pretty-printer will be looked up. If None, then no | |
126 | pretty-printer will be installed. */ | |
127 | PyObject *constructor; | |
128 | ||
b6313243 TT |
129 | /* The pretty-printer that has been constructed. If NULL, then a |
130 | new printer object is needed, and one will be constructed. */ | |
131 | PyObject *pretty_printer; | |
0cc7d26f TT |
132 | |
133 | /* The iterator returned by the printer's 'children' method, or NULL | |
134 | if not available. */ | |
135 | PyObject *child_iter; | |
136 | ||
137 | /* We request one extra item from the iterator, so that we can | |
138 | report to the caller whether there are more items than we have | |
139 | already reported. However, we don't want to install this value | |
140 | when we read it, because that will mess up future updates. So, | |
141 | we stash it here instead. */ | |
142 | PyObject *saved_item; | |
72330bd6 | 143 | }; |
8b93c638 | 144 | |
8b93c638 | 145 | struct cpstack |
72330bd6 AC |
146 | { |
147 | char *name; | |
148 | struct cpstack *next; | |
149 | }; | |
8b93c638 JM |
150 | |
151 | /* A list of varobjs */ | |
152 | ||
153 | struct vlist | |
72330bd6 AC |
154 | { |
155 | struct varobj *var; | |
156 | struct vlist *next; | |
157 | }; | |
8b93c638 JM |
158 | |
159 | /* Private function prototypes */ | |
160 | ||
581e13c1 | 161 | /* Helper functions for the above subcommands. */ |
8b93c638 | 162 | |
a14ed312 | 163 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 164 | |
a14ed312 KB |
165 | static void delete_variable_1 (struct cpstack **, int *, |
166 | struct varobj *, int, int); | |
8b93c638 | 167 | |
a14ed312 | 168 | static int install_variable (struct varobj *); |
8b93c638 | 169 | |
a14ed312 | 170 | static void uninstall_variable (struct varobj *); |
8b93c638 | 171 | |
a14ed312 | 172 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 173 | |
b6313243 | 174 | static struct varobj * |
5e5ac9a5 | 175 | create_child_with_value (struct varobj *parent, int index, char *name, |
b6313243 TT |
176 | struct value *value); |
177 | ||
8b93c638 JM |
178 | /* Utility routines */ |
179 | ||
a14ed312 | 180 | static struct varobj *new_variable (void); |
8b93c638 | 181 | |
a14ed312 | 182 | static struct varobj *new_root_variable (void); |
8b93c638 | 183 | |
a14ed312 | 184 | static void free_variable (struct varobj *var); |
8b93c638 | 185 | |
74b7792f AC |
186 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
187 | ||
a14ed312 | 188 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 189 | |
a14ed312 | 190 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 191 | |
a14ed312 | 192 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 193 | |
8264ba82 AG |
194 | static int update_type_if_necessary (struct varobj *var, |
195 | struct value *new_value); | |
196 | ||
acd65feb VP |
197 | static int install_new_value (struct varobj *var, struct value *value, |
198 | int initial); | |
199 | ||
581e13c1 | 200 | /* Language-specific routines. */ |
8b93c638 | 201 | |
a14ed312 | 202 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 203 | |
a14ed312 | 204 | static int number_of_children (struct varobj *); |
8b93c638 | 205 | |
a14ed312 | 206 | static char *name_of_variable (struct varobj *); |
8b93c638 | 207 | |
a14ed312 | 208 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 209 | |
30b28db1 | 210 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 211 | |
30b28db1 | 212 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 213 | |
de051565 MK |
214 | static char *my_value_of_variable (struct varobj *var, |
215 | enum varobj_display_formats format); | |
8b93c638 | 216 | |
b2c2bd75 | 217 | static int is_root_p (struct varobj *var); |
8b93c638 | 218 | |
d8b65138 JK |
219 | #if HAVE_PYTHON |
220 | ||
9a1edae6 | 221 | static struct varobj *varobj_add_child (struct varobj *var, |
5e5ac9a5 | 222 | char *name, |
9a1edae6 | 223 | struct value *value); |
b6313243 | 224 | |
d8b65138 JK |
225 | #endif /* HAVE_PYTHON */ |
226 | ||
581e13c1 | 227 | /* Array of known source language routines. */ |
99ad9427 YQ |
228 | static const struct lang_varobj_ops *languages[vlang_end] = { |
229 | &c_varobj_ops, | |
230 | &cplus_varobj_ops, | |
231 | &java_varobj_ops, | |
232 | &ada_varobj_ops, | |
72330bd6 | 233 | }; |
8b93c638 JM |
234 | |
235 | /* Private data */ | |
236 | ||
581e13c1 | 237 | /* Mappings of varobj_display_formats enums to gdb's format codes. */ |
72330bd6 | 238 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 | 239 | |
581e13c1 | 240 | /* Header of the list of root variable objects. */ |
8b93c638 | 241 | static struct varobj_root *rootlist; |
8b93c638 | 242 | |
581e13c1 MS |
243 | /* Prime number indicating the number of buckets in the hash table. */ |
244 | /* A prime large enough to avoid too many colisions. */ | |
8b93c638 JM |
245 | #define VAROBJ_TABLE_SIZE 227 |
246 | ||
581e13c1 | 247 | /* Pointer to the varobj hash table (built at run time). */ |
8b93c638 JM |
248 | static struct vlist **varobj_table; |
249 | ||
8b93c638 JM |
250 | \f |
251 | ||
252 | /* API Implementation */ | |
b2c2bd75 VP |
253 | static int |
254 | is_root_p (struct varobj *var) | |
255 | { | |
256 | return (var->root->rootvar == var); | |
257 | } | |
8b93c638 | 258 | |
d452c4bc UW |
259 | #ifdef HAVE_PYTHON |
260 | /* Helper function to install a Python environment suitable for | |
261 | use during operations on VAR. */ | |
70221824 | 262 | static struct cleanup * |
d452c4bc UW |
263 | varobj_ensure_python_env (struct varobj *var) |
264 | { | |
265 | return ensure_python_env (var->root->exp->gdbarch, | |
266 | var->root->exp->language_defn); | |
267 | } | |
268 | #endif | |
269 | ||
581e13c1 | 270 | /* Creates a varobj (not its children). */ |
8b93c638 | 271 | |
7d8547c9 AC |
272 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
273 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
274 | ||
275 | static struct frame_info * | |
276 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
277 | { | |
278 | struct frame_info *frame = NULL; | |
279 | ||
280 | if (frame_addr == (CORE_ADDR) 0) | |
281 | return NULL; | |
282 | ||
9d49bdc2 PA |
283 | for (frame = get_current_frame (); |
284 | frame != NULL; | |
285 | frame = get_prev_frame (frame)) | |
7d8547c9 | 286 | { |
1fac167a UW |
287 | /* The CORE_ADDR we get as argument was parsed from a string GDB |
288 | output as $fp. This output got truncated to gdbarch_addr_bit. | |
289 | Truncate the frame base address in the same manner before | |
290 | comparing it against our argument. */ | |
291 | CORE_ADDR frame_base = get_frame_base_address (frame); | |
292 | int addr_bit = gdbarch_addr_bit (get_frame_arch (frame)); | |
a109c7c1 | 293 | |
1fac167a UW |
294 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
295 | frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
296 | ||
297 | if (frame_base == frame_addr) | |
7d8547c9 AC |
298 | return frame; |
299 | } | |
9d49bdc2 PA |
300 | |
301 | return NULL; | |
7d8547c9 AC |
302 | } |
303 | ||
8b93c638 JM |
304 | struct varobj * |
305 | varobj_create (char *objname, | |
72330bd6 | 306 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
307 | { |
308 | struct varobj *var; | |
8b93c638 JM |
309 | struct cleanup *old_chain; |
310 | ||
581e13c1 | 311 | /* Fill out a varobj structure for the (root) variable being constructed. */ |
8b93c638 | 312 | var = new_root_variable (); |
74b7792f | 313 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
314 | |
315 | if (expression != NULL) | |
316 | { | |
e4195b40 | 317 | struct frame_info *fi; |
35633fef | 318 | struct frame_id old_id = null_frame_id; |
e4195b40 | 319 | struct block *block; |
bbc13ae3 | 320 | const char *p; |
e55dccf0 | 321 | struct value *value = NULL; |
8e7b59a5 | 322 | volatile struct gdb_exception except; |
1bb9788d | 323 | CORE_ADDR pc; |
8b93c638 | 324 | |
9d49bdc2 PA |
325 | /* Parse and evaluate the expression, filling in as much of the |
326 | variable's data as possible. */ | |
327 | ||
328 | if (has_stack_frames ()) | |
329 | { | |
581e13c1 | 330 | /* Allow creator to specify context of variable. */ |
9d49bdc2 PA |
331 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
332 | fi = get_selected_frame (NULL); | |
333 | else | |
334 | /* FIXME: cagney/2002-11-23: This code should be doing a | |
335 | lookup using the frame ID and not just the frame's | |
336 | ``address''. This, of course, means an interface | |
337 | change. However, with out that interface change ISAs, | |
338 | such as the ia64 with its two stacks, won't work. | |
339 | Similar goes for the case where there is a frameless | |
340 | function. */ | |
341 | fi = find_frame_addr_in_frame_chain (frame); | |
342 | } | |
8b93c638 | 343 | else |
9d49bdc2 | 344 | fi = NULL; |
8b93c638 | 345 | |
581e13c1 | 346 | /* frame = -2 means always use selected frame. */ |
73a93a32 | 347 | if (type == USE_SELECTED_FRAME) |
a5defcdc | 348 | var->root->floating = 1; |
73a93a32 | 349 | |
1bb9788d | 350 | pc = 0; |
8b93c638 JM |
351 | block = NULL; |
352 | if (fi != NULL) | |
1bb9788d TT |
353 | { |
354 | block = get_frame_block (fi, 0); | |
355 | pc = get_frame_pc (fi); | |
356 | } | |
8b93c638 JM |
357 | |
358 | p = expression; | |
359 | innermost_block = NULL; | |
73a93a32 | 360 | /* Wrap the call to parse expression, so we can |
581e13c1 | 361 | return a sensible error. */ |
8e7b59a5 KS |
362 | TRY_CATCH (except, RETURN_MASK_ERROR) |
363 | { | |
1bb9788d | 364 | var->root->exp = parse_exp_1 (&p, pc, block, 0); |
8e7b59a5 KS |
365 | } |
366 | ||
367 | if (except.reason < 0) | |
73a93a32 | 368 | { |
f748fb40 | 369 | do_cleanups (old_chain); |
73a93a32 JI |
370 | return NULL; |
371 | } | |
8b93c638 | 372 | |
581e13c1 | 373 | /* Don't allow variables to be created for types. */ |
608b4967 TT |
374 | if (var->root->exp->elts[0].opcode == OP_TYPE |
375 | || var->root->exp->elts[0].opcode == OP_TYPEOF | |
376 | || var->root->exp->elts[0].opcode == OP_DECLTYPE) | |
8b93c638 JM |
377 | { |
378 | do_cleanups (old_chain); | |
bc8332bb AC |
379 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
380 | " as an expression.\n"); | |
8b93c638 JM |
381 | return NULL; |
382 | } | |
383 | ||
384 | var->format = variable_default_display (var); | |
385 | var->root->valid_block = innermost_block; | |
1b36a34b | 386 | var->name = xstrdup (expression); |
02142340 | 387 | /* For a root var, the name and the expr are the same. */ |
1b36a34b | 388 | var->path_expr = xstrdup (expression); |
8b93c638 JM |
389 | |
390 | /* When the frame is different from the current frame, | |
391 | we must select the appropriate frame before parsing | |
392 | the expression, otherwise the value will not be current. | |
581e13c1 | 393 | Since select_frame is so benign, just call it for all cases. */ |
4e22772d | 394 | if (innermost_block) |
8b93c638 | 395 | { |
4e22772d JK |
396 | /* User could specify explicit FRAME-ADDR which was not found but |
397 | EXPRESSION is frame specific and we would not be able to evaluate | |
398 | it correctly next time. With VALID_BLOCK set we must also set | |
399 | FRAME and THREAD_ID. */ | |
400 | if (fi == NULL) | |
401 | error (_("Failed to find the specified frame")); | |
402 | ||
7a424e99 | 403 | var->root->frame = get_frame_id (fi); |
c5b48eac | 404 | var->root->thread_id = pid_to_thread_id (inferior_ptid); |
35633fef | 405 | old_id = get_frame_id (get_selected_frame (NULL)); |
c5b48eac | 406 | select_frame (fi); |
8b93c638 JM |
407 | } |
408 | ||
340a7723 | 409 | /* We definitely need to catch errors here. |
8b93c638 | 410 | If evaluate_expression succeeds we got the value we wanted. |
581e13c1 | 411 | But if it fails, we still go on with a call to evaluate_type(). */ |
8e7b59a5 KS |
412 | TRY_CATCH (except, RETURN_MASK_ERROR) |
413 | { | |
414 | value = evaluate_expression (var->root->exp); | |
415 | } | |
416 | ||
417 | if (except.reason < 0) | |
e55dccf0 VP |
418 | { |
419 | /* Error getting the value. Try to at least get the | |
420 | right type. */ | |
421 | struct value *type_only_value = evaluate_type (var->root->exp); | |
a109c7c1 | 422 | |
e55dccf0 VP |
423 | var->type = value_type (type_only_value); |
424 | } | |
8264ba82 AG |
425 | else |
426 | { | |
427 | int real_type_found = 0; | |
428 | ||
429 | var->type = value_actual_type (value, 0, &real_type_found); | |
430 | if (real_type_found) | |
431 | value = value_cast (var->type, value); | |
432 | } | |
acd65feb | 433 | |
8b93c638 | 434 | /* Set language info */ |
ca20d462 | 435 | var->root->lang_ops = var->root->exp->language_defn->la_varobj_ops; |
8b93c638 | 436 | |
d32cafc7 JB |
437 | install_new_value (var, value, 1 /* Initial assignment */); |
438 | ||
581e13c1 | 439 | /* Set ourselves as our root. */ |
8b93c638 JM |
440 | var->root->rootvar = var; |
441 | ||
581e13c1 | 442 | /* Reset the selected frame. */ |
35633fef JK |
443 | if (frame_id_p (old_id)) |
444 | select_frame (frame_find_by_id (old_id)); | |
8b93c638 JM |
445 | } |
446 | ||
73a93a32 | 447 | /* If the variable object name is null, that means this |
581e13c1 | 448 | is a temporary variable, so don't install it. */ |
73a93a32 JI |
449 | |
450 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 | 451 | { |
1b36a34b | 452 | var->obj_name = xstrdup (objname); |
8b93c638 JM |
453 | |
454 | /* If a varobj name is duplicated, the install will fail so | |
581e13c1 | 455 | we must cleanup. */ |
8b93c638 JM |
456 | if (!install_variable (var)) |
457 | { | |
458 | do_cleanups (old_chain); | |
459 | return NULL; | |
460 | } | |
461 | } | |
462 | ||
463 | discard_cleanups (old_chain); | |
464 | return var; | |
465 | } | |
466 | ||
581e13c1 | 467 | /* Generates an unique name that can be used for a varobj. */ |
8b93c638 JM |
468 | |
469 | char * | |
470 | varobj_gen_name (void) | |
471 | { | |
472 | static int id = 0; | |
e64d9b3d | 473 | char *obj_name; |
8b93c638 | 474 | |
581e13c1 | 475 | /* Generate a name for this object. */ |
8b93c638 | 476 | id++; |
b435e160 | 477 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 478 | |
e64d9b3d | 479 | return obj_name; |
8b93c638 JM |
480 | } |
481 | ||
61d8f275 JK |
482 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
483 | error if OBJNAME cannot be found. */ | |
8b93c638 JM |
484 | |
485 | struct varobj * | |
486 | varobj_get_handle (char *objname) | |
487 | { | |
488 | struct vlist *cv; | |
489 | const char *chp; | |
490 | unsigned int index = 0; | |
491 | unsigned int i = 1; | |
492 | ||
493 | for (chp = objname; *chp; chp++) | |
494 | { | |
495 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
496 | } | |
497 | ||
498 | cv = *(varobj_table + index); | |
499 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
500 | cv = cv->next; | |
501 | ||
502 | if (cv == NULL) | |
8a3fe4f8 | 503 | error (_("Variable object not found")); |
8b93c638 JM |
504 | |
505 | return cv->var; | |
506 | } | |
507 | ||
581e13c1 | 508 | /* Given the handle, return the name of the object. */ |
8b93c638 JM |
509 | |
510 | char * | |
511 | varobj_get_objname (struct varobj *var) | |
512 | { | |
513 | return var->obj_name; | |
514 | } | |
515 | ||
581e13c1 | 516 | /* Given the handle, return the expression represented by the object. */ |
8b93c638 JM |
517 | |
518 | char * | |
519 | varobj_get_expression (struct varobj *var) | |
520 | { | |
521 | return name_of_variable (var); | |
522 | } | |
523 | ||
524 | /* Deletes a varobj and all its children if only_children == 0, | |
3e43a32a MS |
525 | otherwise deletes only the children; returns a malloc'ed list of |
526 | all the (malloc'ed) names of the variables that have been deleted | |
581e13c1 | 527 | (NULL terminated). */ |
8b93c638 JM |
528 | |
529 | int | |
530 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
531 | { | |
532 | int delcount; | |
533 | int mycount; | |
534 | struct cpstack *result = NULL; | |
535 | char **cp; | |
536 | ||
581e13c1 | 537 | /* Initialize a stack for temporary results. */ |
8b93c638 JM |
538 | cppush (&result, NULL); |
539 | ||
540 | if (only_children) | |
581e13c1 | 541 | /* Delete only the variable children. */ |
8b93c638 JM |
542 | delcount = delete_variable (&result, var, 1 /* only the children */ ); |
543 | else | |
581e13c1 | 544 | /* Delete the variable and all its children. */ |
8b93c638 JM |
545 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); |
546 | ||
581e13c1 | 547 | /* We may have been asked to return a list of what has been deleted. */ |
8b93c638 JM |
548 | if (dellist != NULL) |
549 | { | |
550 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
551 | ||
552 | cp = *dellist; | |
553 | mycount = delcount; | |
554 | *cp = cppop (&result); | |
555 | while ((*cp != NULL) && (mycount > 0)) | |
556 | { | |
557 | mycount--; | |
558 | cp++; | |
559 | *cp = cppop (&result); | |
560 | } | |
561 | ||
562 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 563 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 564 | mycount); |
8b93c638 JM |
565 | } |
566 | ||
567 | return delcount; | |
568 | } | |
569 | ||
d8b65138 JK |
570 | #if HAVE_PYTHON |
571 | ||
b6313243 TT |
572 | /* Convenience function for varobj_set_visualizer. Instantiate a |
573 | pretty-printer for a given value. */ | |
574 | static PyObject * | |
575 | instantiate_pretty_printer (PyObject *constructor, struct value *value) | |
576 | { | |
b6313243 TT |
577 | PyObject *val_obj = NULL; |
578 | PyObject *printer; | |
b6313243 | 579 | |
b6313243 | 580 | val_obj = value_to_value_object (value); |
b6313243 TT |
581 | if (! val_obj) |
582 | return NULL; | |
583 | ||
584 | printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL); | |
585 | Py_DECREF (val_obj); | |
586 | return printer; | |
b6313243 TT |
587 | } |
588 | ||
d8b65138 JK |
589 | #endif |
590 | ||
581e13c1 | 591 | /* Set/Get variable object display format. */ |
8b93c638 JM |
592 | |
593 | enum varobj_display_formats | |
594 | varobj_set_display_format (struct varobj *var, | |
595 | enum varobj_display_formats format) | |
596 | { | |
597 | switch (format) | |
598 | { | |
599 | case FORMAT_NATURAL: | |
600 | case FORMAT_BINARY: | |
601 | case FORMAT_DECIMAL: | |
602 | case FORMAT_HEXADECIMAL: | |
603 | case FORMAT_OCTAL: | |
604 | var->format = format; | |
605 | break; | |
606 | ||
607 | default: | |
608 | var->format = variable_default_display (var); | |
609 | } | |
610 | ||
ae7d22a6 VP |
611 | if (varobj_value_is_changeable_p (var) |
612 | && var->value && !value_lazy (var->value)) | |
613 | { | |
6c761d9c | 614 | xfree (var->print_value); |
99ad9427 YQ |
615 | var->print_value = varobj_value_get_print_value (var->value, |
616 | var->format, var); | |
ae7d22a6 VP |
617 | } |
618 | ||
8b93c638 JM |
619 | return var->format; |
620 | } | |
621 | ||
622 | enum varobj_display_formats | |
623 | varobj_get_display_format (struct varobj *var) | |
624 | { | |
625 | return var->format; | |
626 | } | |
627 | ||
b6313243 TT |
628 | char * |
629 | varobj_get_display_hint (struct varobj *var) | |
630 | { | |
631 | char *result = NULL; | |
632 | ||
633 | #if HAVE_PYTHON | |
0646da15 TT |
634 | struct cleanup *back_to; |
635 | ||
636 | if (!gdb_python_initialized) | |
637 | return NULL; | |
638 | ||
639 | back_to = varobj_ensure_python_env (var); | |
d452c4bc | 640 | |
bb5ce47a YQ |
641 | if (var->dynamic->pretty_printer != NULL) |
642 | result = gdbpy_get_display_hint (var->dynamic->pretty_printer); | |
d452c4bc UW |
643 | |
644 | do_cleanups (back_to); | |
b6313243 TT |
645 | #endif |
646 | ||
647 | return result; | |
648 | } | |
649 | ||
0cc7d26f TT |
650 | /* Return true if the varobj has items after TO, false otherwise. */ |
651 | ||
652 | int | |
653 | varobj_has_more (struct varobj *var, int to) | |
654 | { | |
655 | if (VEC_length (varobj_p, var->children) > to) | |
656 | return 1; | |
657 | return ((to == -1 || VEC_length (varobj_p, var->children) == to) | |
bb5ce47a | 658 | && (var->dynamic->saved_item != NULL)); |
0cc7d26f TT |
659 | } |
660 | ||
c5b48eac VP |
661 | /* If the variable object is bound to a specific thread, that |
662 | is its evaluation can always be done in context of a frame | |
663 | inside that thread, returns GDB id of the thread -- which | |
581e13c1 | 664 | is always positive. Otherwise, returns -1. */ |
c5b48eac VP |
665 | int |
666 | varobj_get_thread_id (struct varobj *var) | |
667 | { | |
668 | if (var->root->valid_block && var->root->thread_id > 0) | |
669 | return var->root->thread_id; | |
670 | else | |
671 | return -1; | |
672 | } | |
673 | ||
25d5ea92 VP |
674 | void |
675 | varobj_set_frozen (struct varobj *var, int frozen) | |
676 | { | |
677 | /* When a variable is unfrozen, we don't fetch its value. | |
678 | The 'not_fetched' flag remains set, so next -var-update | |
679 | won't complain. | |
680 | ||
681 | We don't fetch the value, because for structures the client | |
682 | should do -var-update anyway. It would be bad to have different | |
683 | client-size logic for structure and other types. */ | |
684 | var->frozen = frozen; | |
685 | } | |
686 | ||
687 | int | |
688 | varobj_get_frozen (struct varobj *var) | |
689 | { | |
690 | return var->frozen; | |
691 | } | |
692 | ||
0cc7d26f TT |
693 | /* A helper function that restricts a range to what is actually |
694 | available in a VEC. This follows the usual rules for the meaning | |
695 | of FROM and TO -- if either is negative, the entire range is | |
696 | used. */ | |
697 | ||
99ad9427 YQ |
698 | void |
699 | varobj_restrict_range (VEC (varobj_p) *children, int *from, int *to) | |
0cc7d26f TT |
700 | { |
701 | if (*from < 0 || *to < 0) | |
702 | { | |
703 | *from = 0; | |
704 | *to = VEC_length (varobj_p, children); | |
705 | } | |
706 | else | |
707 | { | |
708 | if (*from > VEC_length (varobj_p, children)) | |
709 | *from = VEC_length (varobj_p, children); | |
710 | if (*to > VEC_length (varobj_p, children)) | |
711 | *to = VEC_length (varobj_p, children); | |
712 | if (*from > *to) | |
713 | *from = *to; | |
714 | } | |
715 | } | |
716 | ||
d8b65138 JK |
717 | #if HAVE_PYTHON |
718 | ||
0cc7d26f TT |
719 | /* A helper for update_dynamic_varobj_children that installs a new |
720 | child when needed. */ | |
721 | ||
722 | static void | |
723 | install_dynamic_child (struct varobj *var, | |
724 | VEC (varobj_p) **changed, | |
8264ba82 | 725 | VEC (varobj_p) **type_changed, |
0cc7d26f TT |
726 | VEC (varobj_p) **new, |
727 | VEC (varobj_p) **unchanged, | |
728 | int *cchanged, | |
729 | int index, | |
5e5ac9a5 | 730 | char *name, |
0cc7d26f TT |
731 | struct value *value) |
732 | { | |
733 | if (VEC_length (varobj_p, var->children) < index + 1) | |
734 | { | |
735 | /* There's no child yet. */ | |
736 | struct varobj *child = varobj_add_child (var, name, value); | |
a109c7c1 | 737 | |
0cc7d26f TT |
738 | if (new) |
739 | { | |
740 | VEC_safe_push (varobj_p, *new, child); | |
741 | *cchanged = 1; | |
742 | } | |
743 | } | |
bf8793bb | 744 | else |
0cc7d26f TT |
745 | { |
746 | varobj_p existing = VEC_index (varobj_p, var->children, index); | |
8264ba82 | 747 | int type_updated = update_type_if_necessary (existing, value); |
bf8793bb | 748 | |
8264ba82 AG |
749 | if (type_updated) |
750 | { | |
751 | if (type_changed) | |
752 | VEC_safe_push (varobj_p, *type_changed, existing); | |
753 | } | |
0cc7d26f TT |
754 | if (install_new_value (existing, value, 0)) |
755 | { | |
8264ba82 | 756 | if (!type_updated && changed) |
0cc7d26f TT |
757 | VEC_safe_push (varobj_p, *changed, existing); |
758 | } | |
8264ba82 | 759 | else if (!type_updated && unchanged) |
0cc7d26f TT |
760 | VEC_safe_push (varobj_p, *unchanged, existing); |
761 | } | |
762 | } | |
763 | ||
0cc7d26f TT |
764 | static int |
765 | dynamic_varobj_has_child_method (struct varobj *var) | |
766 | { | |
767 | struct cleanup *back_to; | |
bb5ce47a | 768 | PyObject *printer = var->dynamic->pretty_printer; |
0cc7d26f TT |
769 | int result; |
770 | ||
0646da15 TT |
771 | if (!gdb_python_initialized) |
772 | return 0; | |
773 | ||
0cc7d26f TT |
774 | back_to = varobj_ensure_python_env (var); |
775 | result = PyObject_HasAttr (printer, gdbpy_children_cst); | |
776 | do_cleanups (back_to); | |
777 | return result; | |
778 | } | |
779 | ||
780 | #endif | |
781 | ||
b6313243 TT |
782 | static int |
783 | update_dynamic_varobj_children (struct varobj *var, | |
784 | VEC (varobj_p) **changed, | |
8264ba82 | 785 | VEC (varobj_p) **type_changed, |
0cc7d26f TT |
786 | VEC (varobj_p) **new, |
787 | VEC (varobj_p) **unchanged, | |
788 | int *cchanged, | |
789 | int update_children, | |
790 | int from, | |
791 | int to) | |
b6313243 TT |
792 | { |
793 | #if HAVE_PYTHON | |
b6313243 TT |
794 | struct cleanup *back_to; |
795 | PyObject *children; | |
b6313243 | 796 | int i; |
bb5ce47a | 797 | PyObject *printer = var->dynamic->pretty_printer; |
b6313243 | 798 | |
0646da15 TT |
799 | if (!gdb_python_initialized) |
800 | return 0; | |
801 | ||
d452c4bc | 802 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
803 | |
804 | *cchanged = 0; | |
805 | if (!PyObject_HasAttr (printer, gdbpy_children_cst)) | |
806 | { | |
807 | do_cleanups (back_to); | |
808 | return 0; | |
809 | } | |
810 | ||
bb5ce47a | 811 | if (update_children || var->dynamic->child_iter == NULL) |
b6313243 | 812 | { |
0cc7d26f TT |
813 | children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst, |
814 | NULL); | |
b6313243 | 815 | |
0cc7d26f TT |
816 | if (!children) |
817 | { | |
818 | gdbpy_print_stack (); | |
819 | error (_("Null value returned for children")); | |
820 | } | |
b6313243 | 821 | |
0cc7d26f | 822 | make_cleanup_py_decref (children); |
b6313243 | 823 | |
bb5ce47a YQ |
824 | Py_XDECREF (var->dynamic->child_iter); |
825 | var->dynamic->child_iter = PyObject_GetIter (children); | |
826 | if (var->dynamic->child_iter == NULL) | |
0cc7d26f TT |
827 | { |
828 | gdbpy_print_stack (); | |
829 | error (_("Could not get children iterator")); | |
830 | } | |
831 | ||
bb5ce47a YQ |
832 | Py_XDECREF (var->dynamic->saved_item); |
833 | var->dynamic->saved_item = NULL; | |
0cc7d26f TT |
834 | |
835 | i = 0; | |
b6313243 | 836 | } |
0cc7d26f TT |
837 | else |
838 | i = VEC_length (varobj_p, var->children); | |
b6313243 | 839 | |
0cc7d26f TT |
840 | /* We ask for one extra child, so that MI can report whether there |
841 | are more children. */ | |
842 | for (; to < 0 || i < to + 1; ++i) | |
b6313243 | 843 | { |
0cc7d26f | 844 | PyObject *item; |
a4c8e806 | 845 | int force_done = 0; |
b6313243 | 846 | |
0cc7d26f | 847 | /* See if there was a leftover from last time. */ |
bb5ce47a | 848 | if (var->dynamic->saved_item) |
0cc7d26f | 849 | { |
bb5ce47a YQ |
850 | item = var->dynamic->saved_item; |
851 | var->dynamic->saved_item = NULL; | |
0cc7d26f TT |
852 | } |
853 | else | |
bb5ce47a | 854 | item = PyIter_Next (var->dynamic->child_iter); |
b6313243 | 855 | |
0cc7d26f | 856 | if (!item) |
a4c8e806 TT |
857 | { |
858 | /* Normal end of iteration. */ | |
859 | if (!PyErr_Occurred ()) | |
860 | break; | |
861 | ||
862 | /* If we got a memory error, just use the text as the | |
863 | item. */ | |
864 | if (PyErr_ExceptionMatches (gdbpy_gdb_memory_error)) | |
865 | { | |
866 | PyObject *type, *value, *trace; | |
867 | char *name_str, *value_str; | |
868 | ||
869 | PyErr_Fetch (&type, &value, &trace); | |
870 | value_str = gdbpy_exception_to_string (type, value); | |
871 | Py_XDECREF (type); | |
872 | Py_XDECREF (value); | |
873 | Py_XDECREF (trace); | |
874 | if (!value_str) | |
875 | { | |
876 | gdbpy_print_stack (); | |
877 | break; | |
878 | } | |
879 | ||
880 | name_str = xstrprintf ("<error at %d>", i); | |
881 | item = Py_BuildValue ("(ss)", name_str, value_str); | |
882 | xfree (name_str); | |
883 | xfree (value_str); | |
884 | if (!item) | |
885 | { | |
886 | gdbpy_print_stack (); | |
887 | break; | |
888 | } | |
889 | ||
890 | force_done = 1; | |
891 | } | |
892 | else | |
893 | { | |
894 | /* Any other kind of error. */ | |
895 | gdbpy_print_stack (); | |
896 | break; | |
897 | } | |
898 | } | |
b6313243 | 899 | |
0cc7d26f TT |
900 | /* We don't want to push the extra child on any report list. */ |
901 | if (to < 0 || i < to) | |
b6313243 | 902 | { |
0cc7d26f | 903 | PyObject *py_v; |
ddd49eee | 904 | const char *name; |
0cc7d26f TT |
905 | struct value *v; |
906 | struct cleanup *inner; | |
907 | int can_mention = from < 0 || i >= from; | |
908 | ||
909 | inner = make_cleanup_py_decref (item); | |
910 | ||
911 | if (!PyArg_ParseTuple (item, "sO", &name, &py_v)) | |
a4c8e806 TT |
912 | { |
913 | gdbpy_print_stack (); | |
914 | error (_("Invalid item from the child list")); | |
915 | } | |
0cc7d26f TT |
916 | |
917 | v = convert_value_from_python (py_v); | |
8dc78533 JK |
918 | if (v == NULL) |
919 | gdbpy_print_stack (); | |
0cc7d26f | 920 | install_dynamic_child (var, can_mention ? changed : NULL, |
8264ba82 | 921 | can_mention ? type_changed : NULL, |
0cc7d26f TT |
922 | can_mention ? new : NULL, |
923 | can_mention ? unchanged : NULL, | |
5e5ac9a5 YQ |
924 | can_mention ? cchanged : NULL, i, |
925 | xstrdup (name), v); | |
0cc7d26f | 926 | do_cleanups (inner); |
b6313243 | 927 | } |
0cc7d26f | 928 | else |
b6313243 | 929 | { |
bb5ce47a YQ |
930 | Py_XDECREF (var->dynamic->saved_item); |
931 | var->dynamic->saved_item = item; | |
b6313243 | 932 | |
0cc7d26f TT |
933 | /* We want to truncate the child list just before this |
934 | element. */ | |
935 | break; | |
936 | } | |
a4c8e806 TT |
937 | |
938 | if (force_done) | |
939 | break; | |
b6313243 TT |
940 | } |
941 | ||
942 | if (i < VEC_length (varobj_p, var->children)) | |
943 | { | |
0cc7d26f | 944 | int j; |
a109c7c1 | 945 | |
0cc7d26f TT |
946 | *cchanged = 1; |
947 | for (j = i; j < VEC_length (varobj_p, var->children); ++j) | |
948 | varobj_delete (VEC_index (varobj_p, var->children, j), NULL, 0); | |
949 | VEC_truncate (varobj_p, var->children, i); | |
b6313243 | 950 | } |
0cc7d26f TT |
951 | |
952 | /* If there are fewer children than requested, note that the list of | |
953 | children changed. */ | |
954 | if (to >= 0 && VEC_length (varobj_p, var->children) < to) | |
955 | *cchanged = 1; | |
956 | ||
b6313243 TT |
957 | var->num_children = VEC_length (varobj_p, var->children); |
958 | ||
959 | do_cleanups (back_to); | |
960 | ||
b6313243 TT |
961 | return 1; |
962 | #else | |
9e77999c | 963 | gdb_assert_not_reached ("should never be called if Python is not enabled"); |
b6313243 TT |
964 | #endif |
965 | } | |
25d5ea92 | 966 | |
8b93c638 JM |
967 | int |
968 | varobj_get_num_children (struct varobj *var) | |
969 | { | |
970 | if (var->num_children == -1) | |
b6313243 | 971 | { |
bb5ce47a | 972 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f TT |
973 | { |
974 | int dummy; | |
975 | ||
976 | /* If we have a dynamic varobj, don't report -1 children. | |
977 | So, try to fetch some children first. */ | |
8264ba82 | 978 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, &dummy, |
0cc7d26f TT |
979 | 0, 0, 0); |
980 | } | |
981 | else | |
b6313243 TT |
982 | var->num_children = number_of_children (var); |
983 | } | |
8b93c638 | 984 | |
0cc7d26f | 985 | return var->num_children >= 0 ? var->num_children : 0; |
8b93c638 JM |
986 | } |
987 | ||
988 | /* Creates a list of the immediate children of a variable object; | |
581e13c1 | 989 | the return code is the number of such children or -1 on error. */ |
8b93c638 | 990 | |
d56d46f5 | 991 | VEC (varobj_p)* |
0cc7d26f | 992 | varobj_list_children (struct varobj *var, int *from, int *to) |
8b93c638 | 993 | { |
8b93c638 | 994 | char *name; |
b6313243 TT |
995 | int i, children_changed; |
996 | ||
bb5ce47a | 997 | var->dynamic->children_requested = 1; |
b6313243 | 998 | |
bb5ce47a | 999 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f | 1000 | { |
b6313243 TT |
1001 | /* This, in theory, can result in the number of children changing without |
1002 | frontend noticing. But well, calling -var-list-children on the same | |
1003 | varobj twice is not something a sane frontend would do. */ | |
8264ba82 AG |
1004 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, |
1005 | &children_changed, 0, 0, *to); | |
99ad9427 | 1006 | varobj_restrict_range (var->children, from, to); |
0cc7d26f TT |
1007 | return var->children; |
1008 | } | |
8b93c638 | 1009 | |
8b93c638 JM |
1010 | if (var->num_children == -1) |
1011 | var->num_children = number_of_children (var); | |
1012 | ||
74a44383 DJ |
1013 | /* If that failed, give up. */ |
1014 | if (var->num_children == -1) | |
d56d46f5 | 1015 | return var->children; |
74a44383 | 1016 | |
28335dcc VP |
1017 | /* If we're called when the list of children is not yet initialized, |
1018 | allocate enough elements in it. */ | |
1019 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
1020 | VEC_safe_push (varobj_p, var->children, NULL); | |
1021 | ||
8b93c638 JM |
1022 | for (i = 0; i < var->num_children; i++) |
1023 | { | |
d56d46f5 | 1024 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
1025 | |
1026 | if (existing == NULL) | |
1027 | { | |
1028 | /* Either it's the first call to varobj_list_children for | |
1029 | this variable object, and the child was never created, | |
1030 | or it was explicitly deleted by the client. */ | |
1031 | name = name_of_child (var, i); | |
1032 | existing = create_child (var, i, name); | |
1033 | VEC_replace (varobj_p, var->children, i, existing); | |
1034 | } | |
8b93c638 JM |
1035 | } |
1036 | ||
99ad9427 | 1037 | varobj_restrict_range (var->children, from, to); |
d56d46f5 | 1038 | return var->children; |
8b93c638 JM |
1039 | } |
1040 | ||
d8b65138 JK |
1041 | #if HAVE_PYTHON |
1042 | ||
b6313243 | 1043 | static struct varobj * |
5e5ac9a5 | 1044 | varobj_add_child (struct varobj *var, char *name, struct value *value) |
b6313243 TT |
1045 | { |
1046 | varobj_p v = create_child_with_value (var, | |
1047 | VEC_length (varobj_p, var->children), | |
1048 | name, value); | |
a109c7c1 | 1049 | |
b6313243 | 1050 | VEC_safe_push (varobj_p, var->children, v); |
b6313243 TT |
1051 | return v; |
1052 | } | |
1053 | ||
d8b65138 JK |
1054 | #endif /* HAVE_PYTHON */ |
1055 | ||
8b93c638 | 1056 | /* Obtain the type of an object Variable as a string similar to the one gdb |
581e13c1 | 1057 | prints on the console. */ |
8b93c638 JM |
1058 | |
1059 | char * | |
1060 | varobj_get_type (struct varobj *var) | |
1061 | { | |
581e13c1 | 1062 | /* For the "fake" variables, do not return a type. (It's type is |
8756216b DP |
1063 | NULL, too.) |
1064 | Do not return a type for invalid variables as well. */ | |
1065 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
1066 | return NULL; |
1067 | ||
1a4300e9 | 1068 | return type_to_string (var->type); |
8b93c638 JM |
1069 | } |
1070 | ||
1ecb4ee0 DJ |
1071 | /* Obtain the type of an object variable. */ |
1072 | ||
1073 | struct type * | |
1074 | varobj_get_gdb_type (struct varobj *var) | |
1075 | { | |
1076 | return var->type; | |
1077 | } | |
1078 | ||
85254831 KS |
1079 | /* Is VAR a path expression parent, i.e., can it be used to construct |
1080 | a valid path expression? */ | |
1081 | ||
1082 | static int | |
1083 | is_path_expr_parent (struct varobj *var) | |
1084 | { | |
1085 | struct type *type; | |
1086 | ||
1087 | /* "Fake" children are not path_expr parents. */ | |
1088 | if (CPLUS_FAKE_CHILD (var)) | |
1089 | return 0; | |
1090 | ||
99ad9427 | 1091 | type = varobj_get_value_type (var); |
85254831 KS |
1092 | |
1093 | /* Anonymous unions and structs are also not path_expr parents. */ | |
1094 | return !((TYPE_CODE (type) == TYPE_CODE_STRUCT | |
1095 | || TYPE_CODE (type) == TYPE_CODE_UNION) | |
1096 | && TYPE_NAME (type) == NULL); | |
1097 | } | |
1098 | ||
1099 | /* Return the path expression parent for VAR. */ | |
1100 | ||
99ad9427 YQ |
1101 | struct varobj * |
1102 | varobj_get_path_expr_parent (struct varobj *var) | |
85254831 KS |
1103 | { |
1104 | struct varobj *parent = var; | |
1105 | ||
1106 | while (!is_root_p (parent) && !is_path_expr_parent (parent)) | |
1107 | parent = parent->parent; | |
1108 | ||
1109 | return parent; | |
1110 | } | |
1111 | ||
02142340 VP |
1112 | /* Return a pointer to the full rooted expression of varobj VAR. |
1113 | If it has not been computed yet, compute it. */ | |
1114 | char * | |
1115 | varobj_get_path_expr (struct varobj *var) | |
1116 | { | |
1117 | if (var->path_expr != NULL) | |
1118 | return var->path_expr; | |
1119 | else | |
1120 | { | |
1121 | /* For root varobjs, we initialize path_expr | |
1122 | when creating varobj, so here it should be | |
1123 | child varobj. */ | |
1124 | gdb_assert (!is_root_p (var)); | |
ca20d462 | 1125 | return (*var->root->lang_ops->path_expr_of_child) (var); |
02142340 VP |
1126 | } |
1127 | } | |
1128 | ||
8b93c638 JM |
1129 | enum varobj_languages |
1130 | varobj_get_language (struct varobj *var) | |
1131 | { | |
1132 | return variable_language (var); | |
1133 | } | |
1134 | ||
1135 | int | |
1136 | varobj_get_attributes (struct varobj *var) | |
1137 | { | |
1138 | int attributes = 0; | |
1139 | ||
340a7723 | 1140 | if (varobj_editable_p (var)) |
581e13c1 | 1141 | /* FIXME: define masks for attributes. */ |
8b93c638 JM |
1142 | attributes |= 0x00000001; /* Editable */ |
1143 | ||
1144 | return attributes; | |
1145 | } | |
1146 | ||
0cc7d26f TT |
1147 | int |
1148 | varobj_pretty_printed_p (struct varobj *var) | |
1149 | { | |
bb5ce47a | 1150 | return var->dynamic->pretty_printer != NULL; |
0cc7d26f TT |
1151 | } |
1152 | ||
de051565 MK |
1153 | char * |
1154 | varobj_get_formatted_value (struct varobj *var, | |
1155 | enum varobj_display_formats format) | |
1156 | { | |
1157 | return my_value_of_variable (var, format); | |
1158 | } | |
1159 | ||
8b93c638 JM |
1160 | char * |
1161 | varobj_get_value (struct varobj *var) | |
1162 | { | |
de051565 | 1163 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
1164 | } |
1165 | ||
1166 | /* Set the value of an object variable (if it is editable) to the | |
581e13c1 MS |
1167 | value of the given expression. */ |
1168 | /* Note: Invokes functions that can call error(). */ | |
8b93c638 JM |
1169 | |
1170 | int | |
1171 | varobj_set_value (struct varobj *var, char *expression) | |
1172 | { | |
34365054 | 1173 | struct value *val = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1174 | /* The argument "expression" contains the variable's new value. |
581e13c1 MS |
1175 | We need to first construct a legal expression for this -- ugh! */ |
1176 | /* Does this cover all the bases? */ | |
8b93c638 | 1177 | struct expression *exp; |
34365054 | 1178 | struct value *value = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1179 | int saved_input_radix = input_radix; |
bbc13ae3 | 1180 | const char *s = expression; |
8e7b59a5 | 1181 | volatile struct gdb_exception except; |
8b93c638 | 1182 | |
340a7723 | 1183 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 1184 | |
581e13c1 | 1185 | input_radix = 10; /* ALWAYS reset to decimal temporarily. */ |
1bb9788d | 1186 | exp = parse_exp_1 (&s, 0, 0, 0); |
8e7b59a5 KS |
1187 | TRY_CATCH (except, RETURN_MASK_ERROR) |
1188 | { | |
1189 | value = evaluate_expression (exp); | |
1190 | } | |
1191 | ||
1192 | if (except.reason < 0) | |
340a7723 | 1193 | { |
581e13c1 | 1194 | /* We cannot proceed without a valid expression. */ |
340a7723 NR |
1195 | xfree (exp); |
1196 | return 0; | |
8b93c638 JM |
1197 | } |
1198 | ||
340a7723 NR |
1199 | /* All types that are editable must also be changeable. */ |
1200 | gdb_assert (varobj_value_is_changeable_p (var)); | |
1201 | ||
1202 | /* The value of a changeable variable object must not be lazy. */ | |
1203 | gdb_assert (!value_lazy (var->value)); | |
1204 | ||
1205 | /* Need to coerce the input. We want to check if the | |
1206 | value of the variable object will be different | |
1207 | after assignment, and the first thing value_assign | |
1208 | does is coerce the input. | |
1209 | For example, if we are assigning an array to a pointer variable we | |
b021a221 | 1210 | should compare the pointer with the array's address, not with the |
340a7723 NR |
1211 | array's content. */ |
1212 | value = coerce_array (value); | |
1213 | ||
8e7b59a5 KS |
1214 | /* The new value may be lazy. value_assign, or |
1215 | rather value_contents, will take care of this. */ | |
1216 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
1217 | { | |
1218 | val = value_assign (var->value, value); | |
1219 | } | |
1220 | ||
1221 | if (except.reason < 0) | |
340a7723 | 1222 | return 0; |
8e7b59a5 | 1223 | |
340a7723 NR |
1224 | /* If the value has changed, record it, so that next -var-update can |
1225 | report this change. If a variable had a value of '1', we've set it | |
1226 | to '333' and then set again to '1', when -var-update will report this | |
1227 | variable as changed -- because the first assignment has set the | |
1228 | 'updated' flag. There's no need to optimize that, because return value | |
1229 | of -var-update should be considered an approximation. */ | |
581e13c1 | 1230 | var->updated = install_new_value (var, val, 0 /* Compare values. */); |
340a7723 NR |
1231 | input_radix = saved_input_radix; |
1232 | return 1; | |
8b93c638 JM |
1233 | } |
1234 | ||
0cc7d26f TT |
1235 | #if HAVE_PYTHON |
1236 | ||
1237 | /* A helper function to install a constructor function and visualizer | |
bb5ce47a | 1238 | in a varobj_dynamic. */ |
0cc7d26f TT |
1239 | |
1240 | static void | |
bb5ce47a | 1241 | install_visualizer (struct varobj_dynamic *var, PyObject *constructor, |
0cc7d26f TT |
1242 | PyObject *visualizer) |
1243 | { | |
1244 | Py_XDECREF (var->constructor); | |
1245 | var->constructor = constructor; | |
1246 | ||
1247 | Py_XDECREF (var->pretty_printer); | |
1248 | var->pretty_printer = visualizer; | |
1249 | ||
1250 | Py_XDECREF (var->child_iter); | |
1251 | var->child_iter = NULL; | |
1252 | } | |
1253 | ||
1254 | /* Install the default visualizer for VAR. */ | |
1255 | ||
1256 | static void | |
1257 | install_default_visualizer (struct varobj *var) | |
1258 | { | |
d65aec65 PM |
1259 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1260 | if (CPLUS_FAKE_CHILD (var)) | |
1261 | return; | |
1262 | ||
0cc7d26f TT |
1263 | if (pretty_printing) |
1264 | { | |
1265 | PyObject *pretty_printer = NULL; | |
1266 | ||
1267 | if (var->value) | |
1268 | { | |
1269 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value); | |
1270 | if (! pretty_printer) | |
1271 | { | |
1272 | gdbpy_print_stack (); | |
1273 | error (_("Cannot instantiate printer for default visualizer")); | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | if (pretty_printer == Py_None) | |
1278 | { | |
1279 | Py_DECREF (pretty_printer); | |
1280 | pretty_printer = NULL; | |
1281 | } | |
1282 | ||
bb5ce47a | 1283 | install_visualizer (var->dynamic, NULL, pretty_printer); |
0cc7d26f TT |
1284 | } |
1285 | } | |
1286 | ||
1287 | /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to | |
1288 | make a new object. */ | |
1289 | ||
1290 | static void | |
1291 | construct_visualizer (struct varobj *var, PyObject *constructor) | |
1292 | { | |
1293 | PyObject *pretty_printer; | |
1294 | ||
d65aec65 PM |
1295 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1296 | if (CPLUS_FAKE_CHILD (var)) | |
1297 | return; | |
1298 | ||
0cc7d26f TT |
1299 | Py_INCREF (constructor); |
1300 | if (constructor == Py_None) | |
1301 | pretty_printer = NULL; | |
1302 | else | |
1303 | { | |
1304 | pretty_printer = instantiate_pretty_printer (constructor, var->value); | |
1305 | if (! pretty_printer) | |
1306 | { | |
1307 | gdbpy_print_stack (); | |
1308 | Py_DECREF (constructor); | |
1309 | constructor = Py_None; | |
1310 | Py_INCREF (constructor); | |
1311 | } | |
1312 | ||
1313 | if (pretty_printer == Py_None) | |
1314 | { | |
1315 | Py_DECREF (pretty_printer); | |
1316 | pretty_printer = NULL; | |
1317 | } | |
1318 | } | |
1319 | ||
bb5ce47a | 1320 | install_visualizer (var->dynamic, constructor, pretty_printer); |
0cc7d26f TT |
1321 | } |
1322 | ||
1323 | #endif /* HAVE_PYTHON */ | |
1324 | ||
1325 | /* A helper function for install_new_value. This creates and installs | |
1326 | a visualizer for VAR, if appropriate. */ | |
1327 | ||
1328 | static void | |
1329 | install_new_value_visualizer (struct varobj *var) | |
1330 | { | |
1331 | #if HAVE_PYTHON | |
1332 | /* If the constructor is None, then we want the raw value. If VAR | |
1333 | does not have a value, just skip this. */ | |
0646da15 TT |
1334 | if (!gdb_python_initialized) |
1335 | return; | |
1336 | ||
bb5ce47a | 1337 | if (var->dynamic->constructor != Py_None && var->value != NULL) |
0cc7d26f TT |
1338 | { |
1339 | struct cleanup *cleanup; | |
0cc7d26f TT |
1340 | |
1341 | cleanup = varobj_ensure_python_env (var); | |
1342 | ||
bb5ce47a | 1343 | if (var->dynamic->constructor == NULL) |
0cc7d26f TT |
1344 | install_default_visualizer (var); |
1345 | else | |
bb5ce47a | 1346 | construct_visualizer (var, var->dynamic->constructor); |
0cc7d26f TT |
1347 | |
1348 | do_cleanups (cleanup); | |
1349 | } | |
1350 | #else | |
1351 | /* Do nothing. */ | |
1352 | #endif | |
1353 | } | |
1354 | ||
8264ba82 AG |
1355 | /* When using RTTI to determine variable type it may be changed in runtime when |
1356 | the variable value is changed. This function checks whether type of varobj | |
1357 | VAR will change when a new value NEW_VALUE is assigned and if it is so | |
1358 | updates the type of VAR. */ | |
1359 | ||
1360 | static int | |
1361 | update_type_if_necessary (struct varobj *var, struct value *new_value) | |
1362 | { | |
1363 | if (new_value) | |
1364 | { | |
1365 | struct value_print_options opts; | |
1366 | ||
1367 | get_user_print_options (&opts); | |
1368 | if (opts.objectprint) | |
1369 | { | |
1370 | struct type *new_type; | |
1371 | char *curr_type_str, *new_type_str; | |
1372 | ||
1373 | new_type = value_actual_type (new_value, 0, 0); | |
1374 | new_type_str = type_to_string (new_type); | |
1375 | curr_type_str = varobj_get_type (var); | |
1376 | if (strcmp (curr_type_str, new_type_str) != 0) | |
1377 | { | |
1378 | var->type = new_type; | |
1379 | ||
1380 | /* This information may be not valid for a new type. */ | |
1381 | varobj_delete (var, NULL, 1); | |
1382 | VEC_free (varobj_p, var->children); | |
1383 | var->num_children = -1; | |
1384 | return 1; | |
1385 | } | |
1386 | } | |
1387 | } | |
1388 | ||
1389 | return 0; | |
1390 | } | |
1391 | ||
acd65feb VP |
1392 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
1393 | this is the first assignement after the variable object was just | |
1394 | created, or changed type. In that case, just assign the value | |
1395 | and return 0. | |
581e13c1 MS |
1396 | Otherwise, assign the new value, and return 1 if the value is |
1397 | different from the current one, 0 otherwise. The comparison is | |
1398 | done on textual representation of value. Therefore, some types | |
1399 | need not be compared. E.g. for structures the reported value is | |
1400 | always "{...}", so no comparison is necessary here. If the old | |
1401 | value was NULL and new one is not, or vice versa, we always return 1. | |
b26ed50d VP |
1402 | |
1403 | The VALUE parameter should not be released -- the function will | |
1404 | take care of releasing it when needed. */ | |
acd65feb VP |
1405 | static int |
1406 | install_new_value (struct varobj *var, struct value *value, int initial) | |
1407 | { | |
1408 | int changeable; | |
1409 | int need_to_fetch; | |
1410 | int changed = 0; | |
25d5ea92 | 1411 | int intentionally_not_fetched = 0; |
7a4d50bf | 1412 | char *print_value = NULL; |
acd65feb | 1413 | |
acd65feb | 1414 | /* We need to know the varobj's type to decide if the value should |
3e43a32a | 1415 | be fetched or not. C++ fake children (public/protected/private) |
581e13c1 | 1416 | don't have a type. */ |
acd65feb | 1417 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); |
b2c2bd75 | 1418 | changeable = varobj_value_is_changeable_p (var); |
b6313243 TT |
1419 | |
1420 | /* If the type has custom visualizer, we consider it to be always | |
581e13c1 | 1421 | changeable. FIXME: need to make sure this behaviour will not |
b6313243 | 1422 | mess up read-sensitive values. */ |
bb5ce47a | 1423 | if (var->dynamic->pretty_printer != NULL) |
b6313243 TT |
1424 | changeable = 1; |
1425 | ||
acd65feb VP |
1426 | need_to_fetch = changeable; |
1427 | ||
b26ed50d VP |
1428 | /* We are not interested in the address of references, and given |
1429 | that in C++ a reference is not rebindable, it cannot | |
1430 | meaningfully change. So, get hold of the real value. */ | |
1431 | if (value) | |
0cc7d26f | 1432 | value = coerce_ref (value); |
b26ed50d | 1433 | |
acd65feb VP |
1434 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1435 | /* For unions, we need to fetch the value implicitly because | |
1436 | of implementation of union member fetch. When gdb | |
1437 | creates a value for a field and the value of the enclosing | |
1438 | structure is not lazy, it immediately copies the necessary | |
1439 | bytes from the enclosing values. If the enclosing value is | |
1440 | lazy, the call to value_fetch_lazy on the field will read | |
1441 | the data from memory. For unions, that means we'll read the | |
1442 | same memory more than once, which is not desirable. So | |
1443 | fetch now. */ | |
1444 | need_to_fetch = 1; | |
1445 | ||
1446 | /* The new value might be lazy. If the type is changeable, | |
1447 | that is we'll be comparing values of this type, fetch the | |
1448 | value now. Otherwise, on the next update the old value | |
1449 | will be lazy, which means we've lost that old value. */ | |
1450 | if (need_to_fetch && value && value_lazy (value)) | |
1451 | { | |
25d5ea92 VP |
1452 | struct varobj *parent = var->parent; |
1453 | int frozen = var->frozen; | |
a109c7c1 | 1454 | |
25d5ea92 VP |
1455 | for (; !frozen && parent; parent = parent->parent) |
1456 | frozen |= parent->frozen; | |
1457 | ||
1458 | if (frozen && initial) | |
1459 | { | |
1460 | /* For variables that are frozen, or are children of frozen | |
1461 | variables, we don't do fetch on initial assignment. | |
1462 | For non-initial assignemnt we do the fetch, since it means we're | |
1463 | explicitly asked to compare the new value with the old one. */ | |
1464 | intentionally_not_fetched = 1; | |
1465 | } | |
8e7b59a5 | 1466 | else |
acd65feb | 1467 | { |
8e7b59a5 KS |
1468 | volatile struct gdb_exception except; |
1469 | ||
1470 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
1471 | { | |
1472 | value_fetch_lazy (value); | |
1473 | } | |
1474 | ||
1475 | if (except.reason < 0) | |
1476 | { | |
1477 | /* Set the value to NULL, so that for the next -var-update, | |
1478 | we don't try to compare the new value with this value, | |
1479 | that we couldn't even read. */ | |
1480 | value = NULL; | |
1481 | } | |
acd65feb | 1482 | } |
acd65feb VP |
1483 | } |
1484 | ||
e848a8a5 TT |
1485 | /* Get a reference now, before possibly passing it to any Python |
1486 | code that might release it. */ | |
1487 | if (value != NULL) | |
1488 | value_incref (value); | |
b6313243 | 1489 | |
7a4d50bf VP |
1490 | /* Below, we'll be comparing string rendering of old and new |
1491 | values. Don't get string rendering if the value is | |
1492 | lazy -- if it is, the code above has decided that the value | |
1493 | should not be fetched. */ | |
bb5ce47a YQ |
1494 | if (value != NULL && !value_lazy (value) |
1495 | && var->dynamic->pretty_printer == NULL) | |
99ad9427 | 1496 | print_value = varobj_value_get_print_value (value, var->format, var); |
7a4d50bf | 1497 | |
acd65feb VP |
1498 | /* If the type is changeable, compare the old and the new values. |
1499 | If this is the initial assignment, we don't have any old value | |
1500 | to compare with. */ | |
7a4d50bf | 1501 | if (!initial && changeable) |
acd65feb | 1502 | { |
3e43a32a MS |
1503 | /* If the value of the varobj was changed by -var-set-value, |
1504 | then the value in the varobj and in the target is the same. | |
1505 | However, that value is different from the value that the | |
581e13c1 | 1506 | varobj had after the previous -var-update. So need to the |
3e43a32a | 1507 | varobj as changed. */ |
acd65feb | 1508 | if (var->updated) |
57e66780 | 1509 | { |
57e66780 DJ |
1510 | changed = 1; |
1511 | } | |
bb5ce47a | 1512 | else if (var->dynamic->pretty_printer == NULL) |
acd65feb VP |
1513 | { |
1514 | /* Try to compare the values. That requires that both | |
1515 | values are non-lazy. */ | |
25d5ea92 VP |
1516 | if (var->not_fetched && value_lazy (var->value)) |
1517 | { | |
1518 | /* This is a frozen varobj and the value was never read. | |
1519 | Presumably, UI shows some "never read" indicator. | |
1520 | Now that we've fetched the real value, we need to report | |
1521 | this varobj as changed so that UI can show the real | |
1522 | value. */ | |
1523 | changed = 1; | |
1524 | } | |
1525 | else if (var->value == NULL && value == NULL) | |
581e13c1 | 1526 | /* Equal. */ |
acd65feb VP |
1527 | ; |
1528 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1529 | { |
57e66780 DJ |
1530 | changed = 1; |
1531 | } | |
acd65feb VP |
1532 | else |
1533 | { | |
1534 | gdb_assert (!value_lazy (var->value)); | |
1535 | gdb_assert (!value_lazy (value)); | |
85265413 | 1536 | |
57e66780 | 1537 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1538 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1539 | changed = 1; |
acd65feb VP |
1540 | } |
1541 | } | |
1542 | } | |
85265413 | 1543 | |
ee342b23 VP |
1544 | if (!initial && !changeable) |
1545 | { | |
1546 | /* For values that are not changeable, we don't compare the values. | |
1547 | However, we want to notice if a value was not NULL and now is NULL, | |
1548 | or vise versa, so that we report when top-level varobjs come in scope | |
1549 | and leave the scope. */ | |
1550 | changed = (var->value != NULL) != (value != NULL); | |
1551 | } | |
1552 | ||
acd65feb | 1553 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1554 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1555 | value_free (var->value); |
1556 | var->value = value; | |
25d5ea92 VP |
1557 | if (value && value_lazy (value) && intentionally_not_fetched) |
1558 | var->not_fetched = 1; | |
1559 | else | |
1560 | var->not_fetched = 0; | |
acd65feb | 1561 | var->updated = 0; |
85265413 | 1562 | |
0cc7d26f TT |
1563 | install_new_value_visualizer (var); |
1564 | ||
1565 | /* If we installed a pretty-printer, re-compare the printed version | |
1566 | to see if the variable changed. */ | |
bb5ce47a | 1567 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f TT |
1568 | { |
1569 | xfree (print_value); | |
99ad9427 YQ |
1570 | print_value = varobj_value_get_print_value (var->value, var->format, |
1571 | var); | |
e8f781e2 TT |
1572 | if ((var->print_value == NULL && print_value != NULL) |
1573 | || (var->print_value != NULL && print_value == NULL) | |
1574 | || (var->print_value != NULL && print_value != NULL | |
1575 | && strcmp (var->print_value, print_value) != 0)) | |
0cc7d26f TT |
1576 | changed = 1; |
1577 | } | |
1578 | if (var->print_value) | |
1579 | xfree (var->print_value); | |
1580 | var->print_value = print_value; | |
1581 | ||
b26ed50d | 1582 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1583 | |
1584 | return changed; | |
1585 | } | |
acd65feb | 1586 | |
0cc7d26f TT |
1587 | /* Return the requested range for a varobj. VAR is the varobj. FROM |
1588 | and TO are out parameters; *FROM and *TO will be set to the | |
1589 | selected sub-range of VAR. If no range was selected using | |
1590 | -var-set-update-range, then both will be -1. */ | |
1591 | void | |
1592 | varobj_get_child_range (struct varobj *var, int *from, int *to) | |
b6313243 | 1593 | { |
0cc7d26f TT |
1594 | *from = var->from; |
1595 | *to = var->to; | |
b6313243 TT |
1596 | } |
1597 | ||
0cc7d26f TT |
1598 | /* Set the selected sub-range of children of VAR to start at index |
1599 | FROM and end at index TO. If either FROM or TO is less than zero, | |
1600 | this is interpreted as a request for all children. */ | |
1601 | void | |
1602 | varobj_set_child_range (struct varobj *var, int from, int to) | |
b6313243 | 1603 | { |
0cc7d26f TT |
1604 | var->from = from; |
1605 | var->to = to; | |
b6313243 TT |
1606 | } |
1607 | ||
1608 | void | |
1609 | varobj_set_visualizer (struct varobj *var, const char *visualizer) | |
1610 | { | |
1611 | #if HAVE_PYTHON | |
34fa1d9d MS |
1612 | PyObject *mainmod, *globals, *constructor; |
1613 | struct cleanup *back_to; | |
b6313243 | 1614 | |
0646da15 TT |
1615 | if (!gdb_python_initialized) |
1616 | return; | |
1617 | ||
d452c4bc | 1618 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
1619 | |
1620 | mainmod = PyImport_AddModule ("__main__"); | |
1621 | globals = PyModule_GetDict (mainmod); | |
1622 | Py_INCREF (globals); | |
1623 | make_cleanup_py_decref (globals); | |
1624 | ||
1625 | constructor = PyRun_String (visualizer, Py_eval_input, globals, globals); | |
b6313243 | 1626 | |
0cc7d26f | 1627 | if (! constructor) |
b6313243 TT |
1628 | { |
1629 | gdbpy_print_stack (); | |
da1f2771 | 1630 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
b6313243 TT |
1631 | } |
1632 | ||
0cc7d26f TT |
1633 | construct_visualizer (var, constructor); |
1634 | Py_XDECREF (constructor); | |
b6313243 | 1635 | |
0cc7d26f TT |
1636 | /* If there are any children now, wipe them. */ |
1637 | varobj_delete (var, NULL, 1 /* children only */); | |
1638 | var->num_children = -1; | |
b6313243 TT |
1639 | |
1640 | do_cleanups (back_to); | |
1641 | #else | |
da1f2771 | 1642 | error (_("Python support required")); |
b6313243 TT |
1643 | #endif |
1644 | } | |
1645 | ||
7a290c40 JB |
1646 | /* If NEW_VALUE is the new value of the given varobj (var), return |
1647 | non-zero if var has mutated. In other words, if the type of | |
1648 | the new value is different from the type of the varobj's old | |
1649 | value. | |
1650 | ||
1651 | NEW_VALUE may be NULL, if the varobj is now out of scope. */ | |
1652 | ||
1653 | static int | |
1654 | varobj_value_has_mutated (struct varobj *var, struct value *new_value, | |
1655 | struct type *new_type) | |
1656 | { | |
1657 | /* If we haven't previously computed the number of children in var, | |
1658 | it does not matter from the front-end's perspective whether | |
1659 | the type has mutated or not. For all intents and purposes, | |
1660 | it has not mutated. */ | |
1661 | if (var->num_children < 0) | |
1662 | return 0; | |
1663 | ||
ca20d462 YQ |
1664 | if (var->root->lang_ops->value_has_mutated) |
1665 | return var->root->lang_ops->value_has_mutated (var, new_value, new_type); | |
7a290c40 JB |
1666 | else |
1667 | return 0; | |
1668 | } | |
1669 | ||
8b93c638 JM |
1670 | /* Update the values for a variable and its children. This is a |
1671 | two-pronged attack. First, re-parse the value for the root's | |
1672 | expression to see if it's changed. Then go all the way | |
1673 | through its children, reconstructing them and noting if they've | |
1674 | changed. | |
1675 | ||
25d5ea92 VP |
1676 | The EXPLICIT parameter specifies if this call is result |
1677 | of MI request to update this specific variable, or | |
581e13c1 | 1678 | result of implicit -var-update *. For implicit request, we don't |
25d5ea92 | 1679 | update frozen variables. |
705da579 | 1680 | |
581e13c1 | 1681 | NOTE: This function may delete the caller's varobj. If it |
8756216b DP |
1682 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1683 | to point to the new varobj. */ | |
8b93c638 | 1684 | |
1417b39d JB |
1685 | VEC(varobj_update_result) * |
1686 | varobj_update (struct varobj **varp, int explicit) | |
8b93c638 | 1687 | { |
25d5ea92 | 1688 | int type_changed = 0; |
8b93c638 | 1689 | int i; |
30b28db1 | 1690 | struct value *new; |
b6313243 | 1691 | VEC (varobj_update_result) *stack = NULL; |
f7f9ae2c | 1692 | VEC (varobj_update_result) *result = NULL; |
8b93c638 | 1693 | |
25d5ea92 VP |
1694 | /* Frozen means frozen -- we don't check for any change in |
1695 | this varobj, including its going out of scope, or | |
1696 | changing type. One use case for frozen varobjs is | |
1697 | retaining previously evaluated expressions, and we don't | |
1698 | want them to be reevaluated at all. */ | |
1699 | if (!explicit && (*varp)->frozen) | |
f7f9ae2c | 1700 | return result; |
8756216b DP |
1701 | |
1702 | if (!(*varp)->root->is_valid) | |
f7f9ae2c | 1703 | { |
cfce2ea2 | 1704 | varobj_update_result r = {0}; |
a109c7c1 | 1705 | |
cfce2ea2 | 1706 | r.varobj = *varp; |
f7f9ae2c VP |
1707 | r.status = VAROBJ_INVALID; |
1708 | VEC_safe_push (varobj_update_result, result, &r); | |
1709 | return result; | |
1710 | } | |
8b93c638 | 1711 | |
25d5ea92 | 1712 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1713 | { |
cfce2ea2 | 1714 | varobj_update_result r = {0}; |
a109c7c1 | 1715 | |
cfce2ea2 | 1716 | r.varobj = *varp; |
f7f9ae2c VP |
1717 | r.status = VAROBJ_IN_SCOPE; |
1718 | ||
581e13c1 | 1719 | /* Update the root variable. value_of_root can return NULL |
25d5ea92 | 1720 | if the variable is no longer around, i.e. we stepped out of |
581e13c1 | 1721 | the frame in which a local existed. We are letting the |
25d5ea92 VP |
1722 | value_of_root variable dispose of the varobj if the type |
1723 | has changed. */ | |
25d5ea92 | 1724 | new = value_of_root (varp, &type_changed); |
8264ba82 AG |
1725 | if (update_type_if_necessary(*varp, new)) |
1726 | type_changed = 1; | |
f7f9ae2c | 1727 | r.varobj = *varp; |
f7f9ae2c | 1728 | r.type_changed = type_changed; |
ea56f9c2 | 1729 | if (install_new_value ((*varp), new, type_changed)) |
f7f9ae2c | 1730 | r.changed = 1; |
ea56f9c2 | 1731 | |
25d5ea92 | 1732 | if (new == NULL) |
f7f9ae2c | 1733 | r.status = VAROBJ_NOT_IN_SCOPE; |
b6313243 | 1734 | r.value_installed = 1; |
f7f9ae2c VP |
1735 | |
1736 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
b6313243 | 1737 | { |
0b4bc29a JK |
1738 | if (r.type_changed || r.changed) |
1739 | VEC_safe_push (varobj_update_result, result, &r); | |
b6313243 TT |
1740 | return result; |
1741 | } | |
1742 | ||
1743 | VEC_safe_push (varobj_update_result, stack, &r); | |
1744 | } | |
1745 | else | |
1746 | { | |
cfce2ea2 | 1747 | varobj_update_result r = {0}; |
a109c7c1 | 1748 | |
cfce2ea2 | 1749 | r.varobj = *varp; |
b6313243 | 1750 | VEC_safe_push (varobj_update_result, stack, &r); |
b20d8971 | 1751 | } |
8b93c638 | 1752 | |
8756216b | 1753 | /* Walk through the children, reconstructing them all. */ |
b6313243 | 1754 | while (!VEC_empty (varobj_update_result, stack)) |
8b93c638 | 1755 | { |
b6313243 TT |
1756 | varobj_update_result r = *(VEC_last (varobj_update_result, stack)); |
1757 | struct varobj *v = r.varobj; | |
1758 | ||
1759 | VEC_pop (varobj_update_result, stack); | |
1760 | ||
1761 | /* Update this variable, unless it's a root, which is already | |
1762 | updated. */ | |
1763 | if (!r.value_installed) | |
7a290c40 JB |
1764 | { |
1765 | struct type *new_type; | |
1766 | ||
b6313243 | 1767 | new = value_of_child (v->parent, v->index); |
8264ba82 AG |
1768 | if (update_type_if_necessary(v, new)) |
1769 | r.type_changed = 1; | |
7a290c40 JB |
1770 | if (new) |
1771 | new_type = value_type (new); | |
1772 | else | |
ca20d462 | 1773 | new_type = v->root->lang_ops->type_of_child (v->parent, v->index); |
7a290c40 JB |
1774 | |
1775 | if (varobj_value_has_mutated (v, new, new_type)) | |
1776 | { | |
1777 | /* The children are no longer valid; delete them now. | |
1778 | Report the fact that its type changed as well. */ | |
1779 | varobj_delete (v, NULL, 1 /* only_children */); | |
1780 | v->num_children = -1; | |
1781 | v->to = -1; | |
1782 | v->from = -1; | |
1783 | v->type = new_type; | |
1784 | r.type_changed = 1; | |
1785 | } | |
1786 | ||
1787 | if (install_new_value (v, new, r.type_changed)) | |
b6313243 TT |
1788 | { |
1789 | r.changed = 1; | |
1790 | v->updated = 0; | |
1791 | } | |
1792 | } | |
1793 | ||
1794 | /* We probably should not get children of a varobj that has a | |
1795 | pretty-printer, but for which -var-list-children was never | |
581e13c1 | 1796 | invoked. */ |
bb5ce47a | 1797 | if (v->dynamic->pretty_printer != NULL) |
b6313243 | 1798 | { |
8264ba82 AG |
1799 | VEC (varobj_p) *changed = 0, *type_changed = 0, *unchanged = 0; |
1800 | VEC (varobj_p) *new = 0; | |
26f9bcee | 1801 | int i, children_changed = 0; |
b6313243 TT |
1802 | |
1803 | if (v->frozen) | |
1804 | continue; | |
1805 | ||
bb5ce47a | 1806 | if (!v->dynamic->children_requested) |
0cc7d26f TT |
1807 | { |
1808 | int dummy; | |
1809 | ||
1810 | /* If we initially did not have potential children, but | |
1811 | now we do, consider the varobj as changed. | |
1812 | Otherwise, if children were never requested, consider | |
1813 | it as unchanged -- presumably, such varobj is not yet | |
1814 | expanded in the UI, so we need not bother getting | |
1815 | it. */ | |
1816 | if (!varobj_has_more (v, 0)) | |
1817 | { | |
8264ba82 | 1818 | update_dynamic_varobj_children (v, NULL, NULL, NULL, NULL, |
0cc7d26f TT |
1819 | &dummy, 0, 0, 0); |
1820 | if (varobj_has_more (v, 0)) | |
1821 | r.changed = 1; | |
1822 | } | |
1823 | ||
1824 | if (r.changed) | |
1825 | VEC_safe_push (varobj_update_result, result, &r); | |
1826 | ||
1827 | continue; | |
1828 | } | |
1829 | ||
b6313243 TT |
1830 | /* If update_dynamic_varobj_children returns 0, then we have |
1831 | a non-conforming pretty-printer, so we skip it. */ | |
8264ba82 AG |
1832 | if (update_dynamic_varobj_children (v, &changed, &type_changed, &new, |
1833 | &unchanged, &children_changed, 1, | |
0cc7d26f | 1834 | v->from, v->to)) |
b6313243 | 1835 | { |
0cc7d26f | 1836 | if (children_changed || new) |
b6313243 | 1837 | { |
0cc7d26f TT |
1838 | r.children_changed = 1; |
1839 | r.new = new; | |
b6313243 | 1840 | } |
0cc7d26f TT |
1841 | /* Push in reverse order so that the first child is |
1842 | popped from the work stack first, and so will be | |
1843 | added to result first. This does not affect | |
1844 | correctness, just "nicer". */ | |
8264ba82 AG |
1845 | for (i = VEC_length (varobj_p, type_changed) - 1; i >= 0; --i) |
1846 | { | |
1847 | varobj_p tmp = VEC_index (varobj_p, type_changed, i); | |
1848 | varobj_update_result r = {0}; | |
1849 | ||
1850 | /* Type may change only if value was changed. */ | |
1851 | r.varobj = tmp; | |
1852 | r.changed = 1; | |
1853 | r.type_changed = 1; | |
1854 | r.value_installed = 1; | |
1855 | VEC_safe_push (varobj_update_result, stack, &r); | |
1856 | } | |
0cc7d26f | 1857 | for (i = VEC_length (varobj_p, changed) - 1; i >= 0; --i) |
b6313243 | 1858 | { |
0cc7d26f | 1859 | varobj_p tmp = VEC_index (varobj_p, changed, i); |
cfce2ea2 | 1860 | varobj_update_result r = {0}; |
a109c7c1 | 1861 | |
cfce2ea2 | 1862 | r.varobj = tmp; |
0cc7d26f | 1863 | r.changed = 1; |
b6313243 TT |
1864 | r.value_installed = 1; |
1865 | VEC_safe_push (varobj_update_result, stack, &r); | |
1866 | } | |
0cc7d26f TT |
1867 | for (i = VEC_length (varobj_p, unchanged) - 1; i >= 0; --i) |
1868 | { | |
1869 | varobj_p tmp = VEC_index (varobj_p, unchanged, i); | |
a109c7c1 | 1870 | |
0cc7d26f TT |
1871 | if (!tmp->frozen) |
1872 | { | |
cfce2ea2 | 1873 | varobj_update_result r = {0}; |
a109c7c1 | 1874 | |
cfce2ea2 | 1875 | r.varobj = tmp; |
0cc7d26f TT |
1876 | r.value_installed = 1; |
1877 | VEC_safe_push (varobj_update_result, stack, &r); | |
1878 | } | |
1879 | } | |
b6313243 TT |
1880 | if (r.changed || r.children_changed) |
1881 | VEC_safe_push (varobj_update_result, result, &r); | |
0cc7d26f | 1882 | |
8264ba82 AG |
1883 | /* Free CHANGED, TYPE_CHANGED and UNCHANGED, but not NEW, |
1884 | because NEW has been put into the result vector. */ | |
0cc7d26f | 1885 | VEC_free (varobj_p, changed); |
8264ba82 | 1886 | VEC_free (varobj_p, type_changed); |
0cc7d26f TT |
1887 | VEC_free (varobj_p, unchanged); |
1888 | ||
b6313243 TT |
1889 | continue; |
1890 | } | |
1891 | } | |
28335dcc VP |
1892 | |
1893 | /* Push any children. Use reverse order so that the first | |
1894 | child is popped from the work stack first, and so | |
1895 | will be added to result first. This does not | |
1896 | affect correctness, just "nicer". */ | |
1897 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1898 | { |
28335dcc | 1899 | varobj_p c = VEC_index (varobj_p, v->children, i); |
a109c7c1 | 1900 | |
28335dcc | 1901 | /* Child may be NULL if explicitly deleted by -var-delete. */ |
25d5ea92 | 1902 | if (c != NULL && !c->frozen) |
28335dcc | 1903 | { |
cfce2ea2 | 1904 | varobj_update_result r = {0}; |
a109c7c1 | 1905 | |
cfce2ea2 | 1906 | r.varobj = c; |
b6313243 | 1907 | VEC_safe_push (varobj_update_result, stack, &r); |
28335dcc | 1908 | } |
8b93c638 | 1909 | } |
b6313243 TT |
1910 | |
1911 | if (r.changed || r.type_changed) | |
1912 | VEC_safe_push (varobj_update_result, result, &r); | |
8b93c638 JM |
1913 | } |
1914 | ||
b6313243 TT |
1915 | VEC_free (varobj_update_result, stack); |
1916 | ||
f7f9ae2c | 1917 | return result; |
8b93c638 JM |
1918 | } |
1919 | \f | |
1920 | ||
1921 | /* Helper functions */ | |
1922 | ||
1923 | /* | |
1924 | * Variable object construction/destruction | |
1925 | */ | |
1926 | ||
1927 | static int | |
fba45db2 KB |
1928 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1929 | int only_children_p) | |
8b93c638 JM |
1930 | { |
1931 | int delcount = 0; | |
1932 | ||
1933 | delete_variable_1 (resultp, &delcount, var, | |
1934 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1935 | ||
1936 | return delcount; | |
1937 | } | |
1938 | ||
581e13c1 | 1939 | /* Delete the variable object VAR and its children. */ |
8b93c638 JM |
1940 | /* IMPORTANT NOTE: If we delete a variable which is a child |
1941 | and the parent is not removed we dump core. It must be always | |
581e13c1 | 1942 | initially called with remove_from_parent_p set. */ |
8b93c638 | 1943 | static void |
72330bd6 AC |
1944 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1945 | struct varobj *var, int only_children_p, | |
1946 | int remove_from_parent_p) | |
8b93c638 | 1947 | { |
28335dcc | 1948 | int i; |
8b93c638 | 1949 | |
581e13c1 | 1950 | /* Delete any children of this variable, too. */ |
28335dcc VP |
1951 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1952 | { | |
1953 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
a109c7c1 | 1954 | |
214270ab VP |
1955 | if (!child) |
1956 | continue; | |
8b93c638 | 1957 | if (!remove_from_parent_p) |
28335dcc VP |
1958 | child->parent = NULL; |
1959 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1960 | } |
28335dcc | 1961 | VEC_free (varobj_p, var->children); |
8b93c638 | 1962 | |
581e13c1 | 1963 | /* if we were called to delete only the children we are done here. */ |
8b93c638 JM |
1964 | if (only_children_p) |
1965 | return; | |
1966 | ||
581e13c1 | 1967 | /* Otherwise, add it to the list of deleted ones and proceed to do so. */ |
73a93a32 | 1968 | /* If the name is null, this is a temporary variable, that has not |
581e13c1 | 1969 | yet been installed, don't report it, it belongs to the caller... */ |
73a93a32 | 1970 | if (var->obj_name != NULL) |
8b93c638 | 1971 | { |
5b616ba1 | 1972 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1973 | *delcountp = *delcountp + 1; |
1974 | } | |
1975 | ||
581e13c1 | 1976 | /* If this variable has a parent, remove it from its parent's list. */ |
8b93c638 JM |
1977 | /* OPTIMIZATION: if the parent of this variable is also being deleted, |
1978 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1979 | expensive list search to find the element to remove when we are | |
581e13c1 | 1980 | discarding the list afterwards. */ |
72330bd6 | 1981 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1982 | { |
28335dcc | 1983 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1984 | } |
72330bd6 | 1985 | |
73a93a32 JI |
1986 | if (var->obj_name != NULL) |
1987 | uninstall_variable (var); | |
8b93c638 | 1988 | |
581e13c1 | 1989 | /* Free memory associated with this variable. */ |
8b93c638 JM |
1990 | free_variable (var); |
1991 | } | |
1992 | ||
581e13c1 | 1993 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ |
8b93c638 | 1994 | static int |
fba45db2 | 1995 | install_variable (struct varobj *var) |
8b93c638 JM |
1996 | { |
1997 | struct vlist *cv; | |
1998 | struct vlist *newvl; | |
1999 | const char *chp; | |
2000 | unsigned int index = 0; | |
2001 | unsigned int i = 1; | |
2002 | ||
2003 | for (chp = var->obj_name; *chp; chp++) | |
2004 | { | |
2005 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
2006 | } | |
2007 | ||
2008 | cv = *(varobj_table + index); | |
2009 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
2010 | cv = cv->next; | |
2011 | ||
2012 | if (cv != NULL) | |
8a3fe4f8 | 2013 | error (_("Duplicate variable object name")); |
8b93c638 | 2014 | |
581e13c1 | 2015 | /* Add varobj to hash table. */ |
8b93c638 JM |
2016 | newvl = xmalloc (sizeof (struct vlist)); |
2017 | newvl->next = *(varobj_table + index); | |
2018 | newvl->var = var; | |
2019 | *(varobj_table + index) = newvl; | |
2020 | ||
581e13c1 | 2021 | /* If root, add varobj to root list. */ |
b2c2bd75 | 2022 | if (is_root_p (var)) |
8b93c638 | 2023 | { |
581e13c1 | 2024 | /* Add to list of root variables. */ |
8b93c638 JM |
2025 | if (rootlist == NULL) |
2026 | var->root->next = NULL; | |
2027 | else | |
2028 | var->root->next = rootlist; | |
2029 | rootlist = var->root; | |
8b93c638 JM |
2030 | } |
2031 | ||
2032 | return 1; /* OK */ | |
2033 | } | |
2034 | ||
581e13c1 | 2035 | /* Unistall the object VAR. */ |
8b93c638 | 2036 | static void |
fba45db2 | 2037 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
2038 | { |
2039 | struct vlist *cv; | |
2040 | struct vlist *prev; | |
2041 | struct varobj_root *cr; | |
2042 | struct varobj_root *prer; | |
2043 | const char *chp; | |
2044 | unsigned int index = 0; | |
2045 | unsigned int i = 1; | |
2046 | ||
581e13c1 | 2047 | /* Remove varobj from hash table. */ |
8b93c638 JM |
2048 | for (chp = var->obj_name; *chp; chp++) |
2049 | { | |
2050 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
2051 | } | |
2052 | ||
2053 | cv = *(varobj_table + index); | |
2054 | prev = NULL; | |
2055 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
2056 | { | |
2057 | prev = cv; | |
2058 | cv = cv->next; | |
2059 | } | |
2060 | ||
2061 | if (varobjdebug) | |
2062 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
2063 | ||
2064 | if (cv == NULL) | |
2065 | { | |
72330bd6 AC |
2066 | warning |
2067 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
2068 | var->obj_name); | |
8b93c638 JM |
2069 | return; |
2070 | } | |
2071 | ||
2072 | if (prev == NULL) | |
2073 | *(varobj_table + index) = cv->next; | |
2074 | else | |
2075 | prev->next = cv->next; | |
2076 | ||
b8c9b27d | 2077 | xfree (cv); |
8b93c638 | 2078 | |
581e13c1 | 2079 | /* If root, remove varobj from root list. */ |
b2c2bd75 | 2080 | if (is_root_p (var)) |
8b93c638 | 2081 | { |
581e13c1 | 2082 | /* Remove from list of root variables. */ |
8b93c638 JM |
2083 | if (rootlist == var->root) |
2084 | rootlist = var->root->next; | |
2085 | else | |
2086 | { | |
2087 | prer = NULL; | |
2088 | cr = rootlist; | |
2089 | while ((cr != NULL) && (cr->rootvar != var)) | |
2090 | { | |
2091 | prer = cr; | |
2092 | cr = cr->next; | |
2093 | } | |
2094 | if (cr == NULL) | |
2095 | { | |
8f7e195f JB |
2096 | warning (_("Assertion failed: Could not find " |
2097 | "varobj \"%s\" in root list"), | |
3e43a32a | 2098 | var->obj_name); |
8b93c638 JM |
2099 | return; |
2100 | } | |
2101 | if (prer == NULL) | |
2102 | rootlist = NULL; | |
2103 | else | |
2104 | prer->next = cr->next; | |
2105 | } | |
8b93c638 JM |
2106 | } |
2107 | ||
2108 | } | |
2109 | ||
581e13c1 | 2110 | /* Create and install a child of the parent of the given name. */ |
8b93c638 | 2111 | static struct varobj * |
fba45db2 | 2112 | create_child (struct varobj *parent, int index, char *name) |
b6313243 TT |
2113 | { |
2114 | return create_child_with_value (parent, index, name, | |
2115 | value_of_child (parent, index)); | |
2116 | } | |
2117 | ||
2118 | static struct varobj * | |
5e5ac9a5 | 2119 | create_child_with_value (struct varobj *parent, int index, char *name, |
b6313243 | 2120 | struct value *value) |
8b93c638 JM |
2121 | { |
2122 | struct varobj *child; | |
2123 | char *childs_name; | |
2124 | ||
2125 | child = new_variable (); | |
2126 | ||
5e5ac9a5 YQ |
2127 | /* NAME is allocated by caller. */ |
2128 | child->name = name; | |
8b93c638 | 2129 | child->index = index; |
8b93c638 JM |
2130 | child->parent = parent; |
2131 | child->root = parent->root; | |
85254831 | 2132 | |
99ad9427 | 2133 | if (varobj_is_anonymous_child (child)) |
85254831 KS |
2134 | childs_name = xstrprintf ("%s.%d_anonymous", parent->obj_name, index); |
2135 | else | |
2136 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); | |
8b93c638 | 2137 | child->obj_name = childs_name; |
85254831 | 2138 | |
8b93c638 JM |
2139 | install_variable (child); |
2140 | ||
acd65feb VP |
2141 | /* Compute the type of the child. Must do this before |
2142 | calling install_new_value. */ | |
2143 | if (value != NULL) | |
2144 | /* If the child had no evaluation errors, var->value | |
581e13c1 | 2145 | will be non-NULL and contain a valid type. */ |
8264ba82 | 2146 | child->type = value_actual_type (value, 0, NULL); |
acd65feb | 2147 | else |
581e13c1 | 2148 | /* Otherwise, we must compute the type. */ |
ca20d462 YQ |
2149 | child->type = (*child->root->lang_ops->type_of_child) (child->parent, |
2150 | child->index); | |
acd65feb VP |
2151 | install_new_value (child, value, 1); |
2152 | ||
8b93c638 JM |
2153 | return child; |
2154 | } | |
8b93c638 JM |
2155 | \f |
2156 | ||
2157 | /* | |
2158 | * Miscellaneous utility functions. | |
2159 | */ | |
2160 | ||
581e13c1 | 2161 | /* Allocate memory and initialize a new variable. */ |
8b93c638 JM |
2162 | static struct varobj * |
2163 | new_variable (void) | |
2164 | { | |
2165 | struct varobj *var; | |
2166 | ||
2167 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
2168 | var->name = NULL; | |
02142340 | 2169 | var->path_expr = NULL; |
8b93c638 JM |
2170 | var->obj_name = NULL; |
2171 | var->index = -1; | |
2172 | var->type = NULL; | |
2173 | var->value = NULL; | |
8b93c638 JM |
2174 | var->num_children = -1; |
2175 | var->parent = NULL; | |
2176 | var->children = NULL; | |
2177 | var->format = 0; | |
2178 | var->root = NULL; | |
fb9b6b35 | 2179 | var->updated = 0; |
85265413 | 2180 | var->print_value = NULL; |
25d5ea92 VP |
2181 | var->frozen = 0; |
2182 | var->not_fetched = 0; | |
bb5ce47a YQ |
2183 | var->dynamic |
2184 | = (struct varobj_dynamic *) xmalloc (sizeof (struct varobj_dynamic)); | |
2185 | var->dynamic->children_requested = 0; | |
0cc7d26f TT |
2186 | var->from = -1; |
2187 | var->to = -1; | |
bb5ce47a YQ |
2188 | var->dynamic->constructor = 0; |
2189 | var->dynamic->pretty_printer = 0; | |
2190 | var->dynamic->child_iter = 0; | |
2191 | var->dynamic->saved_item = 0; | |
8b93c638 JM |
2192 | |
2193 | return var; | |
2194 | } | |
2195 | ||
581e13c1 | 2196 | /* Allocate memory and initialize a new root variable. */ |
8b93c638 JM |
2197 | static struct varobj * |
2198 | new_root_variable (void) | |
2199 | { | |
2200 | struct varobj *var = new_variable (); | |
a109c7c1 | 2201 | |
3e43a32a | 2202 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root)); |
ca20d462 | 2203 | var->root->lang_ops = NULL; |
8b93c638 JM |
2204 | var->root->exp = NULL; |
2205 | var->root->valid_block = NULL; | |
7a424e99 | 2206 | var->root->frame = null_frame_id; |
a5defcdc | 2207 | var->root->floating = 0; |
8b93c638 | 2208 | var->root->rootvar = NULL; |
8756216b | 2209 | var->root->is_valid = 1; |
8b93c638 JM |
2210 | |
2211 | return var; | |
2212 | } | |
2213 | ||
581e13c1 | 2214 | /* Free any allocated memory associated with VAR. */ |
8b93c638 | 2215 | static void |
fba45db2 | 2216 | free_variable (struct varobj *var) |
8b93c638 | 2217 | { |
d452c4bc | 2218 | #if HAVE_PYTHON |
bb5ce47a | 2219 | if (var->dynamic->pretty_printer != NULL) |
d452c4bc UW |
2220 | { |
2221 | struct cleanup *cleanup = varobj_ensure_python_env (var); | |
bb5ce47a YQ |
2222 | |
2223 | Py_XDECREF (var->dynamic->constructor); | |
2224 | Py_XDECREF (var->dynamic->pretty_printer); | |
2225 | Py_XDECREF (var->dynamic->child_iter); | |
2226 | Py_XDECREF (var->dynamic->saved_item); | |
d452c4bc UW |
2227 | do_cleanups (cleanup); |
2228 | } | |
2229 | #endif | |
2230 | ||
36746093 JK |
2231 | value_free (var->value); |
2232 | ||
581e13c1 | 2233 | /* Free the expression if this is a root variable. */ |
b2c2bd75 | 2234 | if (is_root_p (var)) |
8b93c638 | 2235 | { |
3038237c | 2236 | xfree (var->root->exp); |
8038e1e2 | 2237 | xfree (var->root); |
8b93c638 JM |
2238 | } |
2239 | ||
8038e1e2 AC |
2240 | xfree (var->name); |
2241 | xfree (var->obj_name); | |
85265413 | 2242 | xfree (var->print_value); |
02142340 | 2243 | xfree (var->path_expr); |
bb5ce47a | 2244 | xfree (var->dynamic); |
8038e1e2 | 2245 | xfree (var); |
8b93c638 JM |
2246 | } |
2247 | ||
74b7792f AC |
2248 | static void |
2249 | do_free_variable_cleanup (void *var) | |
2250 | { | |
2251 | free_variable (var); | |
2252 | } | |
2253 | ||
2254 | static struct cleanup * | |
2255 | make_cleanup_free_variable (struct varobj *var) | |
2256 | { | |
2257 | return make_cleanup (do_free_variable_cleanup, var); | |
2258 | } | |
2259 | ||
6e2a9270 VP |
2260 | /* Return the type of the value that's stored in VAR, |
2261 | or that would have being stored there if the | |
581e13c1 | 2262 | value were accessible. |
6e2a9270 VP |
2263 | |
2264 | This differs from VAR->type in that VAR->type is always | |
2265 | the true type of the expession in the source language. | |
2266 | The return value of this function is the type we're | |
2267 | actually storing in varobj, and using for displaying | |
2268 | the values and for comparing previous and new values. | |
2269 | ||
2270 | For example, top-level references are always stripped. */ | |
99ad9427 YQ |
2271 | struct type * |
2272 | varobj_get_value_type (struct varobj *var) | |
6e2a9270 VP |
2273 | { |
2274 | struct type *type; | |
2275 | ||
2276 | if (var->value) | |
2277 | type = value_type (var->value); | |
2278 | else | |
2279 | type = var->type; | |
2280 | ||
2281 | type = check_typedef (type); | |
2282 | ||
2283 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
2284 | type = get_target_type (type); | |
2285 | ||
2286 | type = check_typedef (type); | |
2287 | ||
2288 | return type; | |
2289 | } | |
2290 | ||
8b93c638 | 2291 | /* What is the default display for this variable? We assume that |
581e13c1 | 2292 | everything is "natural". Any exceptions? */ |
8b93c638 | 2293 | static enum varobj_display_formats |
fba45db2 | 2294 | variable_default_display (struct varobj *var) |
8b93c638 JM |
2295 | { |
2296 | return FORMAT_NATURAL; | |
2297 | } | |
2298 | ||
581e13c1 | 2299 | /* FIXME: The following should be generic for any pointer. */ |
8b93c638 | 2300 | static void |
fba45db2 | 2301 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
2302 | { |
2303 | struct cpstack *s; | |
2304 | ||
2305 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
2306 | s->name = name; | |
2307 | s->next = *pstack; | |
2308 | *pstack = s; | |
2309 | } | |
2310 | ||
581e13c1 | 2311 | /* FIXME: The following should be generic for any pointer. */ |
8b93c638 | 2312 | static char * |
fba45db2 | 2313 | cppop (struct cpstack **pstack) |
8b93c638 JM |
2314 | { |
2315 | struct cpstack *s; | |
2316 | char *v; | |
2317 | ||
2318 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
2319 | return NULL; | |
2320 | ||
2321 | s = *pstack; | |
2322 | v = s->name; | |
2323 | *pstack = (*pstack)->next; | |
b8c9b27d | 2324 | xfree (s); |
8b93c638 JM |
2325 | |
2326 | return v; | |
2327 | } | |
2328 | \f | |
2329 | /* | |
2330 | * Language-dependencies | |
2331 | */ | |
2332 | ||
2333 | /* Common entry points */ | |
2334 | ||
581e13c1 | 2335 | /* Get the language of variable VAR. */ |
8b93c638 | 2336 | static enum varobj_languages |
fba45db2 | 2337 | variable_language (struct varobj *var) |
8b93c638 JM |
2338 | { |
2339 | enum varobj_languages lang; | |
2340 | ||
2341 | switch (var->root->exp->language_defn->la_language) | |
2342 | { | |
2343 | default: | |
2344 | case language_c: | |
2345 | lang = vlang_c; | |
2346 | break; | |
2347 | case language_cplus: | |
2348 | lang = vlang_cplus; | |
2349 | break; | |
2350 | case language_java: | |
2351 | lang = vlang_java; | |
2352 | break; | |
40591b7d JCD |
2353 | case language_ada: |
2354 | lang = vlang_ada; | |
2355 | break; | |
8b93c638 JM |
2356 | } |
2357 | ||
2358 | return lang; | |
2359 | } | |
2360 | ||
2361 | /* Return the number of children for a given variable. | |
2362 | The result of this function is defined by the language | |
581e13c1 | 2363 | implementation. The number of children returned by this function |
8b93c638 | 2364 | is the number of children that the user will see in the variable |
581e13c1 | 2365 | display. */ |
8b93c638 | 2366 | static int |
fba45db2 | 2367 | number_of_children (struct varobj *var) |
8b93c638 | 2368 | { |
ca20d462 | 2369 | return (*var->root->lang_ops->number_of_children) (var); |
8b93c638 JM |
2370 | } |
2371 | ||
3e43a32a | 2372 | /* What is the expression for the root varobj VAR? Returns a malloc'd |
581e13c1 | 2373 | string. */ |
8b93c638 | 2374 | static char * |
fba45db2 | 2375 | name_of_variable (struct varobj *var) |
8b93c638 | 2376 | { |
ca20d462 | 2377 | return (*var->root->lang_ops->name_of_variable) (var); |
8b93c638 JM |
2378 | } |
2379 | ||
3e43a32a | 2380 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd |
581e13c1 | 2381 | string. */ |
8b93c638 | 2382 | static char * |
fba45db2 | 2383 | name_of_child (struct varobj *var, int index) |
8b93c638 | 2384 | { |
ca20d462 | 2385 | return (*var->root->lang_ops->name_of_child) (var, index); |
8b93c638 JM |
2386 | } |
2387 | ||
2213e2be YQ |
2388 | /* If frame associated with VAR can be found, switch |
2389 | to it and return 1. Otherwise, return 0. */ | |
2390 | ||
2391 | static int | |
2392 | check_scope (struct varobj *var) | |
2393 | { | |
2394 | struct frame_info *fi; | |
2395 | int scope; | |
2396 | ||
2397 | fi = frame_find_by_id (var->root->frame); | |
2398 | scope = fi != NULL; | |
2399 | ||
2400 | if (fi) | |
2401 | { | |
2402 | CORE_ADDR pc = get_frame_pc (fi); | |
2403 | ||
2404 | if (pc < BLOCK_START (var->root->valid_block) || | |
2405 | pc >= BLOCK_END (var->root->valid_block)) | |
2406 | scope = 0; | |
2407 | else | |
2408 | select_frame (fi); | |
2409 | } | |
2410 | return scope; | |
2411 | } | |
2412 | ||
2413 | /* Helper function to value_of_root. */ | |
2414 | ||
2415 | static struct value * | |
2416 | value_of_root_1 (struct varobj **var_handle) | |
2417 | { | |
2418 | struct value *new_val = NULL; | |
2419 | struct varobj *var = *var_handle; | |
2420 | int within_scope = 0; | |
2421 | struct cleanup *back_to; | |
2422 | ||
2423 | /* Only root variables can be updated... */ | |
2424 | if (!is_root_p (var)) | |
2425 | /* Not a root var. */ | |
2426 | return NULL; | |
2427 | ||
2428 | back_to = make_cleanup_restore_current_thread (); | |
2429 | ||
2430 | /* Determine whether the variable is still around. */ | |
2431 | if (var->root->valid_block == NULL || var->root->floating) | |
2432 | within_scope = 1; | |
2433 | else if (var->root->thread_id == 0) | |
2434 | { | |
2435 | /* The program was single-threaded when the variable object was | |
2436 | created. Technically, it's possible that the program became | |
2437 | multi-threaded since then, but we don't support such | |
2438 | scenario yet. */ | |
2439 | within_scope = check_scope (var); | |
2440 | } | |
2441 | else | |
2442 | { | |
2443 | ptid_t ptid = thread_id_to_pid (var->root->thread_id); | |
2444 | if (in_thread_list (ptid)) | |
2445 | { | |
2446 | switch_to_thread (ptid); | |
2447 | within_scope = check_scope (var); | |
2448 | } | |
2449 | } | |
2450 | ||
2451 | if (within_scope) | |
2452 | { | |
2453 | volatile struct gdb_exception except; | |
2454 | ||
2455 | /* We need to catch errors here, because if evaluate | |
2456 | expression fails we want to just return NULL. */ | |
2457 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
2458 | { | |
2459 | new_val = evaluate_expression (var->root->exp); | |
2460 | } | |
2461 | } | |
2462 | ||
2463 | do_cleanups (back_to); | |
2464 | ||
2465 | return new_val; | |
2466 | } | |
2467 | ||
a5defcdc VP |
2468 | /* What is the ``struct value *'' of the root variable VAR? |
2469 | For floating variable object, evaluation can get us a value | |
2470 | of different type from what is stored in varobj already. In | |
2471 | that case: | |
2472 | - *type_changed will be set to 1 | |
2473 | - old varobj will be freed, and new one will be | |
2474 | created, with the same name. | |
2475 | - *var_handle will be set to the new varobj | |
2476 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 2477 | static struct value * |
fba45db2 | 2478 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 2479 | { |
73a93a32 JI |
2480 | struct varobj *var; |
2481 | ||
2482 | if (var_handle == NULL) | |
2483 | return NULL; | |
2484 | ||
2485 | var = *var_handle; | |
2486 | ||
2487 | /* This should really be an exception, since this should | |
581e13c1 | 2488 | only get called with a root variable. */ |
73a93a32 | 2489 | |
b2c2bd75 | 2490 | if (!is_root_p (var)) |
73a93a32 JI |
2491 | return NULL; |
2492 | ||
a5defcdc | 2493 | if (var->root->floating) |
73a93a32 JI |
2494 | { |
2495 | struct varobj *tmp_var; | |
2496 | char *old_type, *new_type; | |
6225abfa | 2497 | |
73a93a32 JI |
2498 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
2499 | USE_SELECTED_FRAME); | |
2500 | if (tmp_var == NULL) | |
2501 | { | |
2502 | return NULL; | |
2503 | } | |
6225abfa | 2504 | old_type = varobj_get_type (var); |
73a93a32 | 2505 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 2506 | if (strcmp (old_type, new_type) == 0) |
73a93a32 | 2507 | { |
fcacd99f VP |
2508 | /* The expression presently stored inside var->root->exp |
2509 | remembers the locations of local variables relatively to | |
2510 | the frame where the expression was created (in DWARF location | |
2511 | button, for example). Naturally, those locations are not | |
2512 | correct in other frames, so update the expression. */ | |
2513 | ||
2514 | struct expression *tmp_exp = var->root->exp; | |
a109c7c1 | 2515 | |
fcacd99f VP |
2516 | var->root->exp = tmp_var->root->exp; |
2517 | tmp_var->root->exp = tmp_exp; | |
2518 | ||
73a93a32 JI |
2519 | varobj_delete (tmp_var, NULL, 0); |
2520 | *type_changed = 0; | |
2521 | } | |
2522 | else | |
2523 | { | |
1b36a34b | 2524 | tmp_var->obj_name = xstrdup (var->obj_name); |
0cc7d26f TT |
2525 | tmp_var->from = var->from; |
2526 | tmp_var->to = var->to; | |
a5defcdc VP |
2527 | varobj_delete (var, NULL, 0); |
2528 | ||
73a93a32 JI |
2529 | install_variable (tmp_var); |
2530 | *var_handle = tmp_var; | |
705da579 | 2531 | var = *var_handle; |
73a93a32 JI |
2532 | *type_changed = 1; |
2533 | } | |
74dddad3 MS |
2534 | xfree (old_type); |
2535 | xfree (new_type); | |
73a93a32 JI |
2536 | } |
2537 | else | |
2538 | { | |
2539 | *type_changed = 0; | |
2540 | } | |
2541 | ||
7a290c40 JB |
2542 | { |
2543 | struct value *value; | |
2544 | ||
2213e2be | 2545 | value = value_of_root_1 (var_handle); |
7a290c40 JB |
2546 | if (var->value == NULL || value == NULL) |
2547 | { | |
2548 | /* For root varobj-s, a NULL value indicates a scoping issue. | |
2549 | So, nothing to do in terms of checking for mutations. */ | |
2550 | } | |
2551 | else if (varobj_value_has_mutated (var, value, value_type (value))) | |
2552 | { | |
2553 | /* The type has mutated, so the children are no longer valid. | |
2554 | Just delete them, and tell our caller that the type has | |
2555 | changed. */ | |
2556 | varobj_delete (var, NULL, 1 /* only_children */); | |
2557 | var->num_children = -1; | |
2558 | var->to = -1; | |
2559 | var->from = -1; | |
2560 | *type_changed = 1; | |
2561 | } | |
2562 | return value; | |
2563 | } | |
8b93c638 JM |
2564 | } |
2565 | ||
581e13c1 | 2566 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
30b28db1 | 2567 | static struct value * |
fba45db2 | 2568 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 2569 | { |
30b28db1 | 2570 | struct value *value; |
8b93c638 | 2571 | |
ca20d462 | 2572 | value = (*parent->root->lang_ops->value_of_child) (parent, index); |
8b93c638 | 2573 | |
8b93c638 JM |
2574 | return value; |
2575 | } | |
2576 | ||
581e13c1 | 2577 | /* GDB already has a command called "value_of_variable". Sigh. */ |
8b93c638 | 2578 | static char * |
de051565 | 2579 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2580 | { |
8756216b | 2581 | if (var->root->is_valid) |
0cc7d26f | 2582 | { |
bb5ce47a | 2583 | if (var->dynamic->pretty_printer != NULL) |
99ad9427 | 2584 | return varobj_value_get_print_value (var->value, var->format, var); |
ca20d462 | 2585 | return (*var->root->lang_ops->value_of_variable) (var, format); |
0cc7d26f | 2586 | } |
8756216b DP |
2587 | else |
2588 | return NULL; | |
8b93c638 JM |
2589 | } |
2590 | ||
99ad9427 YQ |
2591 | void |
2592 | varobj_formatted_print_options (struct value_print_options *opts, | |
2593 | enum varobj_display_formats format) | |
2594 | { | |
2595 | get_formatted_print_options (opts, format_code[(int) format]); | |
2596 | opts->deref_ref = 0; | |
2597 | opts->raw = 1; | |
2598 | } | |
2599 | ||
2600 | char * | |
2601 | varobj_value_get_print_value (struct value *value, | |
2602 | enum varobj_display_formats format, | |
2603 | struct varobj *var) | |
85265413 | 2604 | { |
57e66780 | 2605 | struct ui_file *stb; |
621c8364 | 2606 | struct cleanup *old_chain; |
ac91cd70 | 2607 | char *thevalue = NULL; |
79a45b7d | 2608 | struct value_print_options opts; |
be759fcf PM |
2609 | struct type *type = NULL; |
2610 | long len = 0; | |
2611 | char *encoding = NULL; | |
2612 | struct gdbarch *gdbarch = NULL; | |
3a182a69 JK |
2613 | /* Initialize it just to avoid a GCC false warning. */ |
2614 | CORE_ADDR str_addr = 0; | |
09ca9e2e | 2615 | int string_print = 0; |
57e66780 DJ |
2616 | |
2617 | if (value == NULL) | |
2618 | return NULL; | |
2619 | ||
621c8364 TT |
2620 | stb = mem_fileopen (); |
2621 | old_chain = make_cleanup_ui_file_delete (stb); | |
2622 | ||
be759fcf | 2623 | gdbarch = get_type_arch (value_type (value)); |
b6313243 | 2624 | #if HAVE_PYTHON |
0646da15 TT |
2625 | if (gdb_python_initialized) |
2626 | { | |
bb5ce47a | 2627 | PyObject *value_formatter = var->dynamic->pretty_printer; |
d452c4bc | 2628 | |
0646da15 | 2629 | varobj_ensure_python_env (var); |
09ca9e2e | 2630 | |
0646da15 TT |
2631 | if (value_formatter) |
2632 | { | |
2633 | /* First check to see if we have any children at all. If so, | |
2634 | we simply return {...}. */ | |
2635 | if (dynamic_varobj_has_child_method (var)) | |
2636 | { | |
2637 | do_cleanups (old_chain); | |
2638 | return xstrdup ("{...}"); | |
2639 | } | |
b6313243 | 2640 | |
0646da15 TT |
2641 | if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst)) |
2642 | { | |
2643 | struct value *replacement; | |
2644 | PyObject *output = NULL; | |
2645 | ||
2646 | output = apply_varobj_pretty_printer (value_formatter, | |
2647 | &replacement, | |
2648 | stb); | |
2649 | ||
2650 | /* If we have string like output ... */ | |
2651 | if (output) | |
2652 | { | |
2653 | make_cleanup_py_decref (output); | |
2654 | ||
2655 | /* If this is a lazy string, extract it. For lazy | |
2656 | strings we always print as a string, so set | |
2657 | string_print. */ | |
2658 | if (gdbpy_is_lazy_string (output)) | |
2659 | { | |
2660 | gdbpy_extract_lazy_string (output, &str_addr, &type, | |
2661 | &len, &encoding); | |
2662 | make_cleanup (free_current_contents, &encoding); | |
2663 | string_print = 1; | |
2664 | } | |
2665 | else | |
2666 | { | |
2667 | /* If it is a regular (non-lazy) string, extract | |
2668 | it and copy the contents into THEVALUE. If the | |
2669 | hint says to print it as a string, set | |
2670 | string_print. Otherwise just return the extracted | |
2671 | string as a value. */ | |
2672 | ||
2673 | char *s = python_string_to_target_string (output); | |
2674 | ||
2675 | if (s) | |
2676 | { | |
2677 | char *hint; | |
2678 | ||
2679 | hint = gdbpy_get_display_hint (value_formatter); | |
2680 | if (hint) | |
2681 | { | |
2682 | if (!strcmp (hint, "string")) | |
2683 | string_print = 1; | |
2684 | xfree (hint); | |
2685 | } | |
2686 | ||
2687 | len = strlen (s); | |
2688 | thevalue = xmemdup (s, len + 1, len + 1); | |
2689 | type = builtin_type (gdbarch)->builtin_char; | |
2690 | xfree (s); | |
2691 | ||
2692 | if (!string_print) | |
2693 | { | |
2694 | do_cleanups (old_chain); | |
2695 | return thevalue; | |
2696 | } | |
2697 | ||
2698 | make_cleanup (xfree, thevalue); | |
2699 | } | |
2700 | else | |
2701 | gdbpy_print_stack (); | |
2702 | } | |
2703 | } | |
2704 | /* If the printer returned a replacement value, set VALUE | |
2705 | to REPLACEMENT. If there is not a replacement value, | |
2706 | just use the value passed to this function. */ | |
2707 | if (replacement) | |
2708 | value = replacement; | |
2709 | } | |
2710 | } | |
2711 | } | |
b6313243 TT |
2712 | #endif |
2713 | ||
99ad9427 | 2714 | varobj_formatted_print_options (&opts, format); |
00bd41d6 PM |
2715 | |
2716 | /* If the THEVALUE has contents, it is a regular string. */ | |
b6313243 | 2717 | if (thevalue) |
ac91cd70 | 2718 | LA_PRINT_STRING (stb, type, (gdb_byte *) thevalue, len, encoding, 0, &opts); |
09ca9e2e | 2719 | else if (string_print) |
00bd41d6 PM |
2720 | /* Otherwise, if string_print is set, and it is not a regular |
2721 | string, it is a lazy string. */ | |
09ca9e2e | 2722 | val_print_string (type, encoding, str_addr, len, stb, &opts); |
b6313243 | 2723 | else |
00bd41d6 | 2724 | /* All other cases. */ |
b6313243 | 2725 | common_val_print (value, stb, 0, &opts, current_language); |
00bd41d6 | 2726 | |
759ef836 | 2727 | thevalue = ui_file_xstrdup (stb, NULL); |
57e66780 | 2728 | |
85265413 NR |
2729 | do_cleanups (old_chain); |
2730 | return thevalue; | |
2731 | } | |
2732 | ||
340a7723 NR |
2733 | int |
2734 | varobj_editable_p (struct varobj *var) | |
2735 | { | |
2736 | struct type *type; | |
340a7723 NR |
2737 | |
2738 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
2739 | return 0; | |
2740 | ||
99ad9427 | 2741 | type = varobj_get_value_type (var); |
340a7723 NR |
2742 | |
2743 | switch (TYPE_CODE (type)) | |
2744 | { | |
2745 | case TYPE_CODE_STRUCT: | |
2746 | case TYPE_CODE_UNION: | |
2747 | case TYPE_CODE_ARRAY: | |
2748 | case TYPE_CODE_FUNC: | |
2749 | case TYPE_CODE_METHOD: | |
2750 | return 0; | |
2751 | break; | |
2752 | ||
2753 | default: | |
2754 | return 1; | |
2755 | break; | |
2756 | } | |
2757 | } | |
2758 | ||
d32cafc7 | 2759 | /* Call VAR's value_is_changeable_p language-specific callback. */ |
acd65feb | 2760 | |
99ad9427 | 2761 | int |
b2c2bd75 | 2762 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 | 2763 | { |
ca20d462 | 2764 | return var->root->lang_ops->value_is_changeable_p (var); |
8b93c638 JM |
2765 | } |
2766 | ||
5a413362 VP |
2767 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
2768 | selected frame, and not bound to thread/frame. Such variable objects | |
2769 | are created using '@' as frame specifier to -var-create. */ | |
2770 | int | |
2771 | varobj_floating_p (struct varobj *var) | |
2772 | { | |
2773 | return var->root->floating; | |
2774 | } | |
2775 | ||
d32cafc7 JB |
2776 | /* Implement the "value_is_changeable_p" varobj callback for most |
2777 | languages. */ | |
2778 | ||
99ad9427 YQ |
2779 | int |
2780 | varobj_default_value_is_changeable_p (struct varobj *var) | |
d32cafc7 JB |
2781 | { |
2782 | int r; | |
2783 | struct type *type; | |
2784 | ||
2785 | if (CPLUS_FAKE_CHILD (var)) | |
2786 | return 0; | |
2787 | ||
99ad9427 | 2788 | type = varobj_get_value_type (var); |
d32cafc7 JB |
2789 | |
2790 | switch (TYPE_CODE (type)) | |
2791 | { | |
2792 | case TYPE_CODE_STRUCT: | |
2793 | case TYPE_CODE_UNION: | |
2794 | case TYPE_CODE_ARRAY: | |
2795 | r = 0; | |
2796 | break; | |
2797 | ||
2798 | default: | |
2799 | r = 1; | |
2800 | } | |
2801 | ||
2802 | return r; | |
2803 | } | |
2804 | ||
54333c3b JK |
2805 | /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them |
2806 | with an arbitrary caller supplied DATA pointer. */ | |
2807 | ||
2808 | void | |
2809 | all_root_varobjs (void (*func) (struct varobj *var, void *data), void *data) | |
2810 | { | |
2811 | struct varobj_root *var_root, *var_root_next; | |
2812 | ||
2813 | /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */ | |
2814 | ||
2815 | for (var_root = rootlist; var_root != NULL; var_root = var_root_next) | |
2816 | { | |
2817 | var_root_next = var_root->next; | |
2818 | ||
2819 | (*func) (var_root->rootvar, data); | |
2820 | } | |
2821 | } | |
8b93c638 JM |
2822 | \f |
2823 | extern void _initialize_varobj (void); | |
2824 | void | |
2825 | _initialize_varobj (void) | |
2826 | { | |
2827 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2828 | ||
2829 | varobj_table = xmalloc (sizeof_table); | |
2830 | memset (varobj_table, 0, sizeof_table); | |
2831 | ||
ccce17b0 YQ |
2832 | add_setshow_zuinteger_cmd ("debugvarobj", class_maintenance, |
2833 | &varobjdebug, | |
2834 | _("Set varobj debugging."), | |
2835 | _("Show varobj debugging."), | |
2836 | _("When non-zero, varobj debugging is enabled."), | |
2837 | NULL, show_varobjdebug, | |
2838 | &setlist, &showlist); | |
8b93c638 | 2839 | } |
8756216b | 2840 | |
54333c3b | 2841 | /* Invalidate varobj VAR if it is tied to locals and re-create it if it is |
4e969b4f AB |
2842 | defined on globals. It is a helper for varobj_invalidate. |
2843 | ||
2844 | This function is called after changing the symbol file, in this case the | |
2845 | pointers to "struct type" stored by the varobj are no longer valid. All | |
2846 | varobj must be either re-evaluated, or marked as invalid here. */ | |
2dbd25e5 | 2847 | |
54333c3b JK |
2848 | static void |
2849 | varobj_invalidate_iter (struct varobj *var, void *unused) | |
8756216b | 2850 | { |
4e969b4f AB |
2851 | /* global and floating var must be re-evaluated. */ |
2852 | if (var->root->floating || var->root->valid_block == NULL) | |
2dbd25e5 | 2853 | { |
54333c3b | 2854 | struct varobj *tmp_var; |
2dbd25e5 | 2855 | |
54333c3b JK |
2856 | /* Try to create a varobj with same expression. If we succeed |
2857 | replace the old varobj, otherwise invalidate it. */ | |
2858 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
2859 | USE_CURRENT_FRAME); | |
2860 | if (tmp_var != NULL) | |
2861 | { | |
2862 | tmp_var->obj_name = xstrdup (var->obj_name); | |
2863 | varobj_delete (var, NULL, 0); | |
2864 | install_variable (tmp_var); | |
2dbd25e5 | 2865 | } |
54333c3b JK |
2866 | else |
2867 | var->root->is_valid = 0; | |
2dbd25e5 | 2868 | } |
54333c3b JK |
2869 | else /* locals must be invalidated. */ |
2870 | var->root->is_valid = 0; | |
2871 | } | |
2872 | ||
2873 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2874 | are defined on globals. | |
2875 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2876 | ||
2877 | void | |
2878 | varobj_invalidate (void) | |
2879 | { | |
2880 | all_root_varobjs (varobj_invalidate_iter, NULL); | |
8756216b | 2881 | } |