Commit | Line | Data |
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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. */ | |
105 | const struct lang_varobj_ops *lang; | |
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; |
8b93c638 | 321 | enum varobj_languages lang; |
e55dccf0 | 322 | struct value *value = NULL; |
8e7b59a5 | 323 | volatile struct gdb_exception except; |
1bb9788d | 324 | CORE_ADDR pc; |
8b93c638 | 325 | |
9d49bdc2 PA |
326 | /* Parse and evaluate the expression, filling in as much of the |
327 | variable's data as possible. */ | |
328 | ||
329 | if (has_stack_frames ()) | |
330 | { | |
581e13c1 | 331 | /* Allow creator to specify context of variable. */ |
9d49bdc2 PA |
332 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
333 | fi = get_selected_frame (NULL); | |
334 | else | |
335 | /* FIXME: cagney/2002-11-23: This code should be doing a | |
336 | lookup using the frame ID and not just the frame's | |
337 | ``address''. This, of course, means an interface | |
338 | change. However, with out that interface change ISAs, | |
339 | such as the ia64 with its two stacks, won't work. | |
340 | Similar goes for the case where there is a frameless | |
341 | function. */ | |
342 | fi = find_frame_addr_in_frame_chain (frame); | |
343 | } | |
8b93c638 | 344 | else |
9d49bdc2 | 345 | fi = NULL; |
8b93c638 | 346 | |
581e13c1 | 347 | /* frame = -2 means always use selected frame. */ |
73a93a32 | 348 | if (type == USE_SELECTED_FRAME) |
a5defcdc | 349 | var->root->floating = 1; |
73a93a32 | 350 | |
1bb9788d | 351 | pc = 0; |
8b93c638 JM |
352 | block = NULL; |
353 | if (fi != NULL) | |
1bb9788d TT |
354 | { |
355 | block = get_frame_block (fi, 0); | |
356 | pc = get_frame_pc (fi); | |
357 | } | |
8b93c638 JM |
358 | |
359 | p = expression; | |
360 | innermost_block = NULL; | |
73a93a32 | 361 | /* Wrap the call to parse expression, so we can |
581e13c1 | 362 | return a sensible error. */ |
8e7b59a5 KS |
363 | TRY_CATCH (except, RETURN_MASK_ERROR) |
364 | { | |
1bb9788d | 365 | var->root->exp = parse_exp_1 (&p, pc, block, 0); |
8e7b59a5 KS |
366 | } |
367 | ||
368 | if (except.reason < 0) | |
73a93a32 | 369 | { |
f748fb40 | 370 | do_cleanups (old_chain); |
73a93a32 JI |
371 | return NULL; |
372 | } | |
8b93c638 | 373 | |
581e13c1 | 374 | /* Don't allow variables to be created for types. */ |
608b4967 TT |
375 | if (var->root->exp->elts[0].opcode == OP_TYPE |
376 | || var->root->exp->elts[0].opcode == OP_TYPEOF | |
377 | || var->root->exp->elts[0].opcode == OP_DECLTYPE) | |
8b93c638 JM |
378 | { |
379 | do_cleanups (old_chain); | |
bc8332bb AC |
380 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
381 | " as an expression.\n"); | |
8b93c638 JM |
382 | return NULL; |
383 | } | |
384 | ||
385 | var->format = variable_default_display (var); | |
386 | var->root->valid_block = innermost_block; | |
1b36a34b | 387 | var->name = xstrdup (expression); |
02142340 | 388 | /* For a root var, the name and the expr are the same. */ |
1b36a34b | 389 | var->path_expr = xstrdup (expression); |
8b93c638 JM |
390 | |
391 | /* When the frame is different from the current frame, | |
392 | we must select the appropriate frame before parsing | |
393 | the expression, otherwise the value will not be current. | |
581e13c1 | 394 | Since select_frame is so benign, just call it for all cases. */ |
4e22772d | 395 | if (innermost_block) |
8b93c638 | 396 | { |
4e22772d JK |
397 | /* User could specify explicit FRAME-ADDR which was not found but |
398 | EXPRESSION is frame specific and we would not be able to evaluate | |
399 | it correctly next time. With VALID_BLOCK set we must also set | |
400 | FRAME and THREAD_ID. */ | |
401 | if (fi == NULL) | |
402 | error (_("Failed to find the specified frame")); | |
403 | ||
7a424e99 | 404 | var->root->frame = get_frame_id (fi); |
c5b48eac | 405 | var->root->thread_id = pid_to_thread_id (inferior_ptid); |
35633fef | 406 | old_id = get_frame_id (get_selected_frame (NULL)); |
c5b48eac | 407 | select_frame (fi); |
8b93c638 JM |
408 | } |
409 | ||
340a7723 | 410 | /* We definitely need to catch errors here. |
8b93c638 | 411 | If evaluate_expression succeeds we got the value we wanted. |
581e13c1 | 412 | But if it fails, we still go on with a call to evaluate_type(). */ |
8e7b59a5 KS |
413 | TRY_CATCH (except, RETURN_MASK_ERROR) |
414 | { | |
415 | value = evaluate_expression (var->root->exp); | |
416 | } | |
417 | ||
418 | if (except.reason < 0) | |
e55dccf0 VP |
419 | { |
420 | /* Error getting the value. Try to at least get the | |
421 | right type. */ | |
422 | struct value *type_only_value = evaluate_type (var->root->exp); | |
a109c7c1 | 423 | |
e55dccf0 VP |
424 | var->type = value_type (type_only_value); |
425 | } | |
8264ba82 AG |
426 | else |
427 | { | |
428 | int real_type_found = 0; | |
429 | ||
430 | var->type = value_actual_type (value, 0, &real_type_found); | |
431 | if (real_type_found) | |
432 | value = value_cast (var->type, value); | |
433 | } | |
acd65feb | 434 | |
8b93c638 JM |
435 | /* Set language info */ |
436 | lang = variable_language (var); | |
99ad9427 | 437 | var->root->lang = languages[lang]; |
8b93c638 | 438 | |
d32cafc7 JB |
439 | install_new_value (var, value, 1 /* Initial assignment */); |
440 | ||
581e13c1 | 441 | /* Set ourselves as our root. */ |
8b93c638 JM |
442 | var->root->rootvar = var; |
443 | ||
581e13c1 | 444 | /* Reset the selected frame. */ |
35633fef JK |
445 | if (frame_id_p (old_id)) |
446 | select_frame (frame_find_by_id (old_id)); | |
8b93c638 JM |
447 | } |
448 | ||
73a93a32 | 449 | /* If the variable object name is null, that means this |
581e13c1 | 450 | is a temporary variable, so don't install it. */ |
73a93a32 JI |
451 | |
452 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 | 453 | { |
1b36a34b | 454 | var->obj_name = xstrdup (objname); |
8b93c638 JM |
455 | |
456 | /* If a varobj name is duplicated, the install will fail so | |
581e13c1 | 457 | we must cleanup. */ |
8b93c638 JM |
458 | if (!install_variable (var)) |
459 | { | |
460 | do_cleanups (old_chain); | |
461 | return NULL; | |
462 | } | |
463 | } | |
464 | ||
465 | discard_cleanups (old_chain); | |
466 | return var; | |
467 | } | |
468 | ||
581e13c1 | 469 | /* Generates an unique name that can be used for a varobj. */ |
8b93c638 JM |
470 | |
471 | char * | |
472 | varobj_gen_name (void) | |
473 | { | |
474 | static int id = 0; | |
e64d9b3d | 475 | char *obj_name; |
8b93c638 | 476 | |
581e13c1 | 477 | /* Generate a name for this object. */ |
8b93c638 | 478 | id++; |
b435e160 | 479 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 480 | |
e64d9b3d | 481 | return obj_name; |
8b93c638 JM |
482 | } |
483 | ||
61d8f275 JK |
484 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
485 | error if OBJNAME cannot be found. */ | |
8b93c638 JM |
486 | |
487 | struct varobj * | |
488 | varobj_get_handle (char *objname) | |
489 | { | |
490 | struct vlist *cv; | |
491 | const char *chp; | |
492 | unsigned int index = 0; | |
493 | unsigned int i = 1; | |
494 | ||
495 | for (chp = objname; *chp; chp++) | |
496 | { | |
497 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
498 | } | |
499 | ||
500 | cv = *(varobj_table + index); | |
501 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
502 | cv = cv->next; | |
503 | ||
504 | if (cv == NULL) | |
8a3fe4f8 | 505 | error (_("Variable object not found")); |
8b93c638 JM |
506 | |
507 | return cv->var; | |
508 | } | |
509 | ||
581e13c1 | 510 | /* Given the handle, return the name of the object. */ |
8b93c638 JM |
511 | |
512 | char * | |
513 | varobj_get_objname (struct varobj *var) | |
514 | { | |
515 | return var->obj_name; | |
516 | } | |
517 | ||
581e13c1 | 518 | /* Given the handle, return the expression represented by the object. */ |
8b93c638 JM |
519 | |
520 | char * | |
521 | varobj_get_expression (struct varobj *var) | |
522 | { | |
523 | return name_of_variable (var); | |
524 | } | |
525 | ||
526 | /* Deletes a varobj and all its children if only_children == 0, | |
3e43a32a MS |
527 | otherwise deletes only the children; returns a malloc'ed list of |
528 | all the (malloc'ed) names of the variables that have been deleted | |
581e13c1 | 529 | (NULL terminated). */ |
8b93c638 JM |
530 | |
531 | int | |
532 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
533 | { | |
534 | int delcount; | |
535 | int mycount; | |
536 | struct cpstack *result = NULL; | |
537 | char **cp; | |
538 | ||
581e13c1 | 539 | /* Initialize a stack for temporary results. */ |
8b93c638 JM |
540 | cppush (&result, NULL); |
541 | ||
542 | if (only_children) | |
581e13c1 | 543 | /* Delete only the variable children. */ |
8b93c638 JM |
544 | delcount = delete_variable (&result, var, 1 /* only the children */ ); |
545 | else | |
581e13c1 | 546 | /* Delete the variable and all its children. */ |
8b93c638 JM |
547 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); |
548 | ||
581e13c1 | 549 | /* We may have been asked to return a list of what has been deleted. */ |
8b93c638 JM |
550 | if (dellist != NULL) |
551 | { | |
552 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
553 | ||
554 | cp = *dellist; | |
555 | mycount = delcount; | |
556 | *cp = cppop (&result); | |
557 | while ((*cp != NULL) && (mycount > 0)) | |
558 | { | |
559 | mycount--; | |
560 | cp++; | |
561 | *cp = cppop (&result); | |
562 | } | |
563 | ||
564 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 565 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 566 | mycount); |
8b93c638 JM |
567 | } |
568 | ||
569 | return delcount; | |
570 | } | |
571 | ||
d8b65138 JK |
572 | #if HAVE_PYTHON |
573 | ||
b6313243 TT |
574 | /* Convenience function for varobj_set_visualizer. Instantiate a |
575 | pretty-printer for a given value. */ | |
576 | static PyObject * | |
577 | instantiate_pretty_printer (PyObject *constructor, struct value *value) | |
578 | { | |
b6313243 TT |
579 | PyObject *val_obj = NULL; |
580 | PyObject *printer; | |
b6313243 | 581 | |
b6313243 | 582 | val_obj = value_to_value_object (value); |
b6313243 TT |
583 | if (! val_obj) |
584 | return NULL; | |
585 | ||
586 | printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL); | |
587 | Py_DECREF (val_obj); | |
588 | return printer; | |
b6313243 TT |
589 | } |
590 | ||
d8b65138 JK |
591 | #endif |
592 | ||
581e13c1 | 593 | /* Set/Get variable object display format. */ |
8b93c638 JM |
594 | |
595 | enum varobj_display_formats | |
596 | varobj_set_display_format (struct varobj *var, | |
597 | enum varobj_display_formats format) | |
598 | { | |
599 | switch (format) | |
600 | { | |
601 | case FORMAT_NATURAL: | |
602 | case FORMAT_BINARY: | |
603 | case FORMAT_DECIMAL: | |
604 | case FORMAT_HEXADECIMAL: | |
605 | case FORMAT_OCTAL: | |
606 | var->format = format; | |
607 | break; | |
608 | ||
609 | default: | |
610 | var->format = variable_default_display (var); | |
611 | } | |
612 | ||
ae7d22a6 VP |
613 | if (varobj_value_is_changeable_p (var) |
614 | && var->value && !value_lazy (var->value)) | |
615 | { | |
6c761d9c | 616 | xfree (var->print_value); |
99ad9427 YQ |
617 | var->print_value = varobj_value_get_print_value (var->value, |
618 | var->format, var); | |
ae7d22a6 VP |
619 | } |
620 | ||
8b93c638 JM |
621 | return var->format; |
622 | } | |
623 | ||
624 | enum varobj_display_formats | |
625 | varobj_get_display_format (struct varobj *var) | |
626 | { | |
627 | return var->format; | |
628 | } | |
629 | ||
b6313243 TT |
630 | char * |
631 | varobj_get_display_hint (struct varobj *var) | |
632 | { | |
633 | char *result = NULL; | |
634 | ||
635 | #if HAVE_PYTHON | |
0646da15 TT |
636 | struct cleanup *back_to; |
637 | ||
638 | if (!gdb_python_initialized) | |
639 | return NULL; | |
640 | ||
641 | back_to = varobj_ensure_python_env (var); | |
d452c4bc | 642 | |
bb5ce47a YQ |
643 | if (var->dynamic->pretty_printer != NULL) |
644 | result = gdbpy_get_display_hint (var->dynamic->pretty_printer); | |
d452c4bc UW |
645 | |
646 | do_cleanups (back_to); | |
b6313243 TT |
647 | #endif |
648 | ||
649 | return result; | |
650 | } | |
651 | ||
0cc7d26f TT |
652 | /* Return true if the varobj has items after TO, false otherwise. */ |
653 | ||
654 | int | |
655 | varobj_has_more (struct varobj *var, int to) | |
656 | { | |
657 | if (VEC_length (varobj_p, var->children) > to) | |
658 | return 1; | |
659 | return ((to == -1 || VEC_length (varobj_p, var->children) == to) | |
bb5ce47a | 660 | && (var->dynamic->saved_item != NULL)); |
0cc7d26f TT |
661 | } |
662 | ||
c5b48eac VP |
663 | /* If the variable object is bound to a specific thread, that |
664 | is its evaluation can always be done in context of a frame | |
665 | inside that thread, returns GDB id of the thread -- which | |
581e13c1 | 666 | is always positive. Otherwise, returns -1. */ |
c5b48eac VP |
667 | int |
668 | varobj_get_thread_id (struct varobj *var) | |
669 | { | |
670 | if (var->root->valid_block && var->root->thread_id > 0) | |
671 | return var->root->thread_id; | |
672 | else | |
673 | return -1; | |
674 | } | |
675 | ||
25d5ea92 VP |
676 | void |
677 | varobj_set_frozen (struct varobj *var, int frozen) | |
678 | { | |
679 | /* When a variable is unfrozen, we don't fetch its value. | |
680 | The 'not_fetched' flag remains set, so next -var-update | |
681 | won't complain. | |
682 | ||
683 | We don't fetch the value, because for structures the client | |
684 | should do -var-update anyway. It would be bad to have different | |
685 | client-size logic for structure and other types. */ | |
686 | var->frozen = frozen; | |
687 | } | |
688 | ||
689 | int | |
690 | varobj_get_frozen (struct varobj *var) | |
691 | { | |
692 | return var->frozen; | |
693 | } | |
694 | ||
0cc7d26f TT |
695 | /* A helper function that restricts a range to what is actually |
696 | available in a VEC. This follows the usual rules for the meaning | |
697 | of FROM and TO -- if either is negative, the entire range is | |
698 | used. */ | |
699 | ||
99ad9427 YQ |
700 | void |
701 | varobj_restrict_range (VEC (varobj_p) *children, int *from, int *to) | |
0cc7d26f TT |
702 | { |
703 | if (*from < 0 || *to < 0) | |
704 | { | |
705 | *from = 0; | |
706 | *to = VEC_length (varobj_p, children); | |
707 | } | |
708 | else | |
709 | { | |
710 | if (*from > VEC_length (varobj_p, children)) | |
711 | *from = VEC_length (varobj_p, children); | |
712 | if (*to > VEC_length (varobj_p, children)) | |
713 | *to = VEC_length (varobj_p, children); | |
714 | if (*from > *to) | |
715 | *from = *to; | |
716 | } | |
717 | } | |
718 | ||
d8b65138 JK |
719 | #if HAVE_PYTHON |
720 | ||
0cc7d26f TT |
721 | /* A helper for update_dynamic_varobj_children that installs a new |
722 | child when needed. */ | |
723 | ||
724 | static void | |
725 | install_dynamic_child (struct varobj *var, | |
726 | VEC (varobj_p) **changed, | |
8264ba82 | 727 | VEC (varobj_p) **type_changed, |
0cc7d26f TT |
728 | VEC (varobj_p) **new, |
729 | VEC (varobj_p) **unchanged, | |
730 | int *cchanged, | |
731 | int index, | |
5e5ac9a5 | 732 | char *name, |
0cc7d26f TT |
733 | struct value *value) |
734 | { | |
735 | if (VEC_length (varobj_p, var->children) < index + 1) | |
736 | { | |
737 | /* There's no child yet. */ | |
738 | struct varobj *child = varobj_add_child (var, name, value); | |
a109c7c1 | 739 | |
0cc7d26f TT |
740 | if (new) |
741 | { | |
742 | VEC_safe_push (varobj_p, *new, child); | |
743 | *cchanged = 1; | |
744 | } | |
745 | } | |
bf8793bb | 746 | else |
0cc7d26f TT |
747 | { |
748 | varobj_p existing = VEC_index (varobj_p, var->children, index); | |
8264ba82 | 749 | int type_updated = update_type_if_necessary (existing, value); |
bf8793bb | 750 | |
8264ba82 AG |
751 | if (type_updated) |
752 | { | |
753 | if (type_changed) | |
754 | VEC_safe_push (varobj_p, *type_changed, existing); | |
755 | } | |
0cc7d26f TT |
756 | if (install_new_value (existing, value, 0)) |
757 | { | |
8264ba82 | 758 | if (!type_updated && changed) |
0cc7d26f TT |
759 | VEC_safe_push (varobj_p, *changed, existing); |
760 | } | |
8264ba82 | 761 | else if (!type_updated && unchanged) |
0cc7d26f TT |
762 | VEC_safe_push (varobj_p, *unchanged, existing); |
763 | } | |
764 | } | |
765 | ||
0cc7d26f TT |
766 | static int |
767 | dynamic_varobj_has_child_method (struct varobj *var) | |
768 | { | |
769 | struct cleanup *back_to; | |
bb5ce47a | 770 | PyObject *printer = var->dynamic->pretty_printer; |
0cc7d26f TT |
771 | int result; |
772 | ||
0646da15 TT |
773 | if (!gdb_python_initialized) |
774 | return 0; | |
775 | ||
0cc7d26f TT |
776 | back_to = varobj_ensure_python_env (var); |
777 | result = PyObject_HasAttr (printer, gdbpy_children_cst); | |
778 | do_cleanups (back_to); | |
779 | return result; | |
780 | } | |
781 | ||
782 | #endif | |
783 | ||
b6313243 TT |
784 | static int |
785 | update_dynamic_varobj_children (struct varobj *var, | |
786 | VEC (varobj_p) **changed, | |
8264ba82 | 787 | VEC (varobj_p) **type_changed, |
0cc7d26f TT |
788 | VEC (varobj_p) **new, |
789 | VEC (varobj_p) **unchanged, | |
790 | int *cchanged, | |
791 | int update_children, | |
792 | int from, | |
793 | int to) | |
b6313243 TT |
794 | { |
795 | #if HAVE_PYTHON | |
b6313243 TT |
796 | struct cleanup *back_to; |
797 | PyObject *children; | |
b6313243 | 798 | int i; |
bb5ce47a | 799 | PyObject *printer = var->dynamic->pretty_printer; |
b6313243 | 800 | |
0646da15 TT |
801 | if (!gdb_python_initialized) |
802 | return 0; | |
803 | ||
d452c4bc | 804 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
805 | |
806 | *cchanged = 0; | |
807 | if (!PyObject_HasAttr (printer, gdbpy_children_cst)) | |
808 | { | |
809 | do_cleanups (back_to); | |
810 | return 0; | |
811 | } | |
812 | ||
bb5ce47a | 813 | if (update_children || var->dynamic->child_iter == NULL) |
b6313243 | 814 | { |
0cc7d26f TT |
815 | children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst, |
816 | NULL); | |
b6313243 | 817 | |
0cc7d26f TT |
818 | if (!children) |
819 | { | |
820 | gdbpy_print_stack (); | |
821 | error (_("Null value returned for children")); | |
822 | } | |
b6313243 | 823 | |
0cc7d26f | 824 | make_cleanup_py_decref (children); |
b6313243 | 825 | |
bb5ce47a YQ |
826 | Py_XDECREF (var->dynamic->child_iter); |
827 | var->dynamic->child_iter = PyObject_GetIter (children); | |
828 | if (var->dynamic->child_iter == NULL) | |
0cc7d26f TT |
829 | { |
830 | gdbpy_print_stack (); | |
831 | error (_("Could not get children iterator")); | |
832 | } | |
833 | ||
bb5ce47a YQ |
834 | Py_XDECREF (var->dynamic->saved_item); |
835 | var->dynamic->saved_item = NULL; | |
0cc7d26f TT |
836 | |
837 | i = 0; | |
b6313243 | 838 | } |
0cc7d26f TT |
839 | else |
840 | i = VEC_length (varobj_p, var->children); | |
b6313243 | 841 | |
0cc7d26f TT |
842 | /* We ask for one extra child, so that MI can report whether there |
843 | are more children. */ | |
844 | for (; to < 0 || i < to + 1; ++i) | |
b6313243 | 845 | { |
0cc7d26f | 846 | PyObject *item; |
a4c8e806 | 847 | int force_done = 0; |
b6313243 | 848 | |
0cc7d26f | 849 | /* See if there was a leftover from last time. */ |
bb5ce47a | 850 | if (var->dynamic->saved_item) |
0cc7d26f | 851 | { |
bb5ce47a YQ |
852 | item = var->dynamic->saved_item; |
853 | var->dynamic->saved_item = NULL; | |
0cc7d26f TT |
854 | } |
855 | else | |
bb5ce47a | 856 | item = PyIter_Next (var->dynamic->child_iter); |
b6313243 | 857 | |
0cc7d26f | 858 | if (!item) |
a4c8e806 TT |
859 | { |
860 | /* Normal end of iteration. */ | |
861 | if (!PyErr_Occurred ()) | |
862 | break; | |
863 | ||
864 | /* If we got a memory error, just use the text as the | |
865 | item. */ | |
866 | if (PyErr_ExceptionMatches (gdbpy_gdb_memory_error)) | |
867 | { | |
868 | PyObject *type, *value, *trace; | |
869 | char *name_str, *value_str; | |
870 | ||
871 | PyErr_Fetch (&type, &value, &trace); | |
872 | value_str = gdbpy_exception_to_string (type, value); | |
873 | Py_XDECREF (type); | |
874 | Py_XDECREF (value); | |
875 | Py_XDECREF (trace); | |
876 | if (!value_str) | |
877 | { | |
878 | gdbpy_print_stack (); | |
879 | break; | |
880 | } | |
881 | ||
882 | name_str = xstrprintf ("<error at %d>", i); | |
883 | item = Py_BuildValue ("(ss)", name_str, value_str); | |
884 | xfree (name_str); | |
885 | xfree (value_str); | |
886 | if (!item) | |
887 | { | |
888 | gdbpy_print_stack (); | |
889 | break; | |
890 | } | |
891 | ||
892 | force_done = 1; | |
893 | } | |
894 | else | |
895 | { | |
896 | /* Any other kind of error. */ | |
897 | gdbpy_print_stack (); | |
898 | break; | |
899 | } | |
900 | } | |
b6313243 | 901 | |
0cc7d26f TT |
902 | /* We don't want to push the extra child on any report list. */ |
903 | if (to < 0 || i < to) | |
b6313243 | 904 | { |
0cc7d26f | 905 | PyObject *py_v; |
ddd49eee | 906 | const char *name; |
0cc7d26f TT |
907 | struct value *v; |
908 | struct cleanup *inner; | |
909 | int can_mention = from < 0 || i >= from; | |
910 | ||
911 | inner = make_cleanup_py_decref (item); | |
912 | ||
913 | if (!PyArg_ParseTuple (item, "sO", &name, &py_v)) | |
a4c8e806 TT |
914 | { |
915 | gdbpy_print_stack (); | |
916 | error (_("Invalid item from the child list")); | |
917 | } | |
0cc7d26f TT |
918 | |
919 | v = convert_value_from_python (py_v); | |
8dc78533 JK |
920 | if (v == NULL) |
921 | gdbpy_print_stack (); | |
0cc7d26f | 922 | install_dynamic_child (var, can_mention ? changed : NULL, |
8264ba82 | 923 | can_mention ? type_changed : NULL, |
0cc7d26f TT |
924 | can_mention ? new : NULL, |
925 | can_mention ? unchanged : NULL, | |
5e5ac9a5 YQ |
926 | can_mention ? cchanged : NULL, i, |
927 | xstrdup (name), v); | |
0cc7d26f | 928 | do_cleanups (inner); |
b6313243 | 929 | } |
0cc7d26f | 930 | else |
b6313243 | 931 | { |
bb5ce47a YQ |
932 | Py_XDECREF (var->dynamic->saved_item); |
933 | var->dynamic->saved_item = item; | |
b6313243 | 934 | |
0cc7d26f TT |
935 | /* We want to truncate the child list just before this |
936 | element. */ | |
937 | break; | |
938 | } | |
a4c8e806 TT |
939 | |
940 | if (force_done) | |
941 | break; | |
b6313243 TT |
942 | } |
943 | ||
944 | if (i < VEC_length (varobj_p, var->children)) | |
945 | { | |
0cc7d26f | 946 | int j; |
a109c7c1 | 947 | |
0cc7d26f TT |
948 | *cchanged = 1; |
949 | for (j = i; j < VEC_length (varobj_p, var->children); ++j) | |
950 | varobj_delete (VEC_index (varobj_p, var->children, j), NULL, 0); | |
951 | VEC_truncate (varobj_p, var->children, i); | |
b6313243 | 952 | } |
0cc7d26f TT |
953 | |
954 | /* If there are fewer children than requested, note that the list of | |
955 | children changed. */ | |
956 | if (to >= 0 && VEC_length (varobj_p, var->children) < to) | |
957 | *cchanged = 1; | |
958 | ||
b6313243 TT |
959 | var->num_children = VEC_length (varobj_p, var->children); |
960 | ||
961 | do_cleanups (back_to); | |
962 | ||
b6313243 TT |
963 | return 1; |
964 | #else | |
9e77999c | 965 | gdb_assert_not_reached ("should never be called if Python is not enabled"); |
b6313243 TT |
966 | #endif |
967 | } | |
25d5ea92 | 968 | |
8b93c638 JM |
969 | int |
970 | varobj_get_num_children (struct varobj *var) | |
971 | { | |
972 | if (var->num_children == -1) | |
b6313243 | 973 | { |
bb5ce47a | 974 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f TT |
975 | { |
976 | int dummy; | |
977 | ||
978 | /* If we have a dynamic varobj, don't report -1 children. | |
979 | So, try to fetch some children first. */ | |
8264ba82 | 980 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, &dummy, |
0cc7d26f TT |
981 | 0, 0, 0); |
982 | } | |
983 | else | |
b6313243 TT |
984 | var->num_children = number_of_children (var); |
985 | } | |
8b93c638 | 986 | |
0cc7d26f | 987 | return var->num_children >= 0 ? var->num_children : 0; |
8b93c638 JM |
988 | } |
989 | ||
990 | /* Creates a list of the immediate children of a variable object; | |
581e13c1 | 991 | the return code is the number of such children or -1 on error. */ |
8b93c638 | 992 | |
d56d46f5 | 993 | VEC (varobj_p)* |
0cc7d26f | 994 | varobj_list_children (struct varobj *var, int *from, int *to) |
8b93c638 | 995 | { |
8b93c638 | 996 | char *name; |
b6313243 TT |
997 | int i, children_changed; |
998 | ||
bb5ce47a | 999 | var->dynamic->children_requested = 1; |
b6313243 | 1000 | |
bb5ce47a | 1001 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f | 1002 | { |
b6313243 TT |
1003 | /* This, in theory, can result in the number of children changing without |
1004 | frontend noticing. But well, calling -var-list-children on the same | |
1005 | varobj twice is not something a sane frontend would do. */ | |
8264ba82 AG |
1006 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, |
1007 | &children_changed, 0, 0, *to); | |
99ad9427 | 1008 | varobj_restrict_range (var->children, from, to); |
0cc7d26f TT |
1009 | return var->children; |
1010 | } | |
8b93c638 | 1011 | |
8b93c638 JM |
1012 | if (var->num_children == -1) |
1013 | var->num_children = number_of_children (var); | |
1014 | ||
74a44383 DJ |
1015 | /* If that failed, give up. */ |
1016 | if (var->num_children == -1) | |
d56d46f5 | 1017 | return var->children; |
74a44383 | 1018 | |
28335dcc VP |
1019 | /* If we're called when the list of children is not yet initialized, |
1020 | allocate enough elements in it. */ | |
1021 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
1022 | VEC_safe_push (varobj_p, var->children, NULL); | |
1023 | ||
8b93c638 JM |
1024 | for (i = 0; i < var->num_children; i++) |
1025 | { | |
d56d46f5 | 1026 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
1027 | |
1028 | if (existing == NULL) | |
1029 | { | |
1030 | /* Either it's the first call to varobj_list_children for | |
1031 | this variable object, and the child was never created, | |
1032 | or it was explicitly deleted by the client. */ | |
1033 | name = name_of_child (var, i); | |
1034 | existing = create_child (var, i, name); | |
1035 | VEC_replace (varobj_p, var->children, i, existing); | |
1036 | } | |
8b93c638 JM |
1037 | } |
1038 | ||
99ad9427 | 1039 | varobj_restrict_range (var->children, from, to); |
d56d46f5 | 1040 | return var->children; |
8b93c638 JM |
1041 | } |
1042 | ||
d8b65138 JK |
1043 | #if HAVE_PYTHON |
1044 | ||
b6313243 | 1045 | static struct varobj * |
5e5ac9a5 | 1046 | varobj_add_child (struct varobj *var, char *name, struct value *value) |
b6313243 TT |
1047 | { |
1048 | varobj_p v = create_child_with_value (var, | |
1049 | VEC_length (varobj_p, var->children), | |
1050 | name, value); | |
a109c7c1 | 1051 | |
b6313243 | 1052 | VEC_safe_push (varobj_p, var->children, v); |
b6313243 TT |
1053 | return v; |
1054 | } | |
1055 | ||
d8b65138 JK |
1056 | #endif /* HAVE_PYTHON */ |
1057 | ||
8b93c638 | 1058 | /* Obtain the type of an object Variable as a string similar to the one gdb |
581e13c1 | 1059 | prints on the console. */ |
8b93c638 JM |
1060 | |
1061 | char * | |
1062 | varobj_get_type (struct varobj *var) | |
1063 | { | |
581e13c1 | 1064 | /* For the "fake" variables, do not return a type. (It's type is |
8756216b DP |
1065 | NULL, too.) |
1066 | Do not return a type for invalid variables as well. */ | |
1067 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
1068 | return NULL; |
1069 | ||
1a4300e9 | 1070 | return type_to_string (var->type); |
8b93c638 JM |
1071 | } |
1072 | ||
1ecb4ee0 DJ |
1073 | /* Obtain the type of an object variable. */ |
1074 | ||
1075 | struct type * | |
1076 | varobj_get_gdb_type (struct varobj *var) | |
1077 | { | |
1078 | return var->type; | |
1079 | } | |
1080 | ||
85254831 KS |
1081 | /* Is VAR a path expression parent, i.e., can it be used to construct |
1082 | a valid path expression? */ | |
1083 | ||
1084 | static int | |
1085 | is_path_expr_parent (struct varobj *var) | |
1086 | { | |
1087 | struct type *type; | |
1088 | ||
1089 | /* "Fake" children are not path_expr parents. */ | |
1090 | if (CPLUS_FAKE_CHILD (var)) | |
1091 | return 0; | |
1092 | ||
99ad9427 | 1093 | type = varobj_get_value_type (var); |
85254831 KS |
1094 | |
1095 | /* Anonymous unions and structs are also not path_expr parents. */ | |
1096 | return !((TYPE_CODE (type) == TYPE_CODE_STRUCT | |
1097 | || TYPE_CODE (type) == TYPE_CODE_UNION) | |
1098 | && TYPE_NAME (type) == NULL); | |
1099 | } | |
1100 | ||
1101 | /* Return the path expression parent for VAR. */ | |
1102 | ||
99ad9427 YQ |
1103 | struct varobj * |
1104 | varobj_get_path_expr_parent (struct varobj *var) | |
85254831 KS |
1105 | { |
1106 | struct varobj *parent = var; | |
1107 | ||
1108 | while (!is_root_p (parent) && !is_path_expr_parent (parent)) | |
1109 | parent = parent->parent; | |
1110 | ||
1111 | return parent; | |
1112 | } | |
1113 | ||
02142340 VP |
1114 | /* Return a pointer to the full rooted expression of varobj VAR. |
1115 | If it has not been computed yet, compute it. */ | |
1116 | char * | |
1117 | varobj_get_path_expr (struct varobj *var) | |
1118 | { | |
1119 | if (var->path_expr != NULL) | |
1120 | return var->path_expr; | |
1121 | else | |
1122 | { | |
1123 | /* For root varobjs, we initialize path_expr | |
1124 | when creating varobj, so here it should be | |
1125 | child varobj. */ | |
1126 | gdb_assert (!is_root_p (var)); | |
1127 | return (*var->root->lang->path_expr_of_child) (var); | |
1128 | } | |
1129 | } | |
1130 | ||
8b93c638 JM |
1131 | enum varobj_languages |
1132 | varobj_get_language (struct varobj *var) | |
1133 | { | |
1134 | return variable_language (var); | |
1135 | } | |
1136 | ||
1137 | int | |
1138 | varobj_get_attributes (struct varobj *var) | |
1139 | { | |
1140 | int attributes = 0; | |
1141 | ||
340a7723 | 1142 | if (varobj_editable_p (var)) |
581e13c1 | 1143 | /* FIXME: define masks for attributes. */ |
8b93c638 JM |
1144 | attributes |= 0x00000001; /* Editable */ |
1145 | ||
1146 | return attributes; | |
1147 | } | |
1148 | ||
0cc7d26f TT |
1149 | int |
1150 | varobj_pretty_printed_p (struct varobj *var) | |
1151 | { | |
bb5ce47a | 1152 | return var->dynamic->pretty_printer != NULL; |
0cc7d26f TT |
1153 | } |
1154 | ||
de051565 MK |
1155 | char * |
1156 | varobj_get_formatted_value (struct varobj *var, | |
1157 | enum varobj_display_formats format) | |
1158 | { | |
1159 | return my_value_of_variable (var, format); | |
1160 | } | |
1161 | ||
8b93c638 JM |
1162 | char * |
1163 | varobj_get_value (struct varobj *var) | |
1164 | { | |
de051565 | 1165 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
1166 | } |
1167 | ||
1168 | /* Set the value of an object variable (if it is editable) to the | |
581e13c1 MS |
1169 | value of the given expression. */ |
1170 | /* Note: Invokes functions that can call error(). */ | |
8b93c638 JM |
1171 | |
1172 | int | |
1173 | varobj_set_value (struct varobj *var, char *expression) | |
1174 | { | |
34365054 | 1175 | struct value *val = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1176 | /* The argument "expression" contains the variable's new value. |
581e13c1 MS |
1177 | We need to first construct a legal expression for this -- ugh! */ |
1178 | /* Does this cover all the bases? */ | |
8b93c638 | 1179 | struct expression *exp; |
34365054 | 1180 | struct value *value = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1181 | int saved_input_radix = input_radix; |
bbc13ae3 | 1182 | const char *s = expression; |
8e7b59a5 | 1183 | volatile struct gdb_exception except; |
8b93c638 | 1184 | |
340a7723 | 1185 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 1186 | |
581e13c1 | 1187 | input_radix = 10; /* ALWAYS reset to decimal temporarily. */ |
1bb9788d | 1188 | exp = parse_exp_1 (&s, 0, 0, 0); |
8e7b59a5 KS |
1189 | TRY_CATCH (except, RETURN_MASK_ERROR) |
1190 | { | |
1191 | value = evaluate_expression (exp); | |
1192 | } | |
1193 | ||
1194 | if (except.reason < 0) | |
340a7723 | 1195 | { |
581e13c1 | 1196 | /* We cannot proceed without a valid expression. */ |
340a7723 NR |
1197 | xfree (exp); |
1198 | return 0; | |
8b93c638 JM |
1199 | } |
1200 | ||
340a7723 NR |
1201 | /* All types that are editable must also be changeable. */ |
1202 | gdb_assert (varobj_value_is_changeable_p (var)); | |
1203 | ||
1204 | /* The value of a changeable variable object must not be lazy. */ | |
1205 | gdb_assert (!value_lazy (var->value)); | |
1206 | ||
1207 | /* Need to coerce the input. We want to check if the | |
1208 | value of the variable object will be different | |
1209 | after assignment, and the first thing value_assign | |
1210 | does is coerce the input. | |
1211 | For example, if we are assigning an array to a pointer variable we | |
b021a221 | 1212 | should compare the pointer with the array's address, not with the |
340a7723 NR |
1213 | array's content. */ |
1214 | value = coerce_array (value); | |
1215 | ||
8e7b59a5 KS |
1216 | /* The new value may be lazy. value_assign, or |
1217 | rather value_contents, will take care of this. */ | |
1218 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
1219 | { | |
1220 | val = value_assign (var->value, value); | |
1221 | } | |
1222 | ||
1223 | if (except.reason < 0) | |
340a7723 | 1224 | return 0; |
8e7b59a5 | 1225 | |
340a7723 NR |
1226 | /* If the value has changed, record it, so that next -var-update can |
1227 | report this change. If a variable had a value of '1', we've set it | |
1228 | to '333' and then set again to '1', when -var-update will report this | |
1229 | variable as changed -- because the first assignment has set the | |
1230 | 'updated' flag. There's no need to optimize that, because return value | |
1231 | of -var-update should be considered an approximation. */ | |
581e13c1 | 1232 | var->updated = install_new_value (var, val, 0 /* Compare values. */); |
340a7723 NR |
1233 | input_radix = saved_input_radix; |
1234 | return 1; | |
8b93c638 JM |
1235 | } |
1236 | ||
0cc7d26f TT |
1237 | #if HAVE_PYTHON |
1238 | ||
1239 | /* A helper function to install a constructor function and visualizer | |
bb5ce47a | 1240 | in a varobj_dynamic. */ |
0cc7d26f TT |
1241 | |
1242 | static void | |
bb5ce47a | 1243 | install_visualizer (struct varobj_dynamic *var, PyObject *constructor, |
0cc7d26f TT |
1244 | PyObject *visualizer) |
1245 | { | |
1246 | Py_XDECREF (var->constructor); | |
1247 | var->constructor = constructor; | |
1248 | ||
1249 | Py_XDECREF (var->pretty_printer); | |
1250 | var->pretty_printer = visualizer; | |
1251 | ||
1252 | Py_XDECREF (var->child_iter); | |
1253 | var->child_iter = NULL; | |
1254 | } | |
1255 | ||
1256 | /* Install the default visualizer for VAR. */ | |
1257 | ||
1258 | static void | |
1259 | install_default_visualizer (struct varobj *var) | |
1260 | { | |
d65aec65 PM |
1261 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1262 | if (CPLUS_FAKE_CHILD (var)) | |
1263 | return; | |
1264 | ||
0cc7d26f TT |
1265 | if (pretty_printing) |
1266 | { | |
1267 | PyObject *pretty_printer = NULL; | |
1268 | ||
1269 | if (var->value) | |
1270 | { | |
1271 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value); | |
1272 | if (! pretty_printer) | |
1273 | { | |
1274 | gdbpy_print_stack (); | |
1275 | error (_("Cannot instantiate printer for default visualizer")); | |
1276 | } | |
1277 | } | |
1278 | ||
1279 | if (pretty_printer == Py_None) | |
1280 | { | |
1281 | Py_DECREF (pretty_printer); | |
1282 | pretty_printer = NULL; | |
1283 | } | |
1284 | ||
bb5ce47a | 1285 | install_visualizer (var->dynamic, NULL, pretty_printer); |
0cc7d26f TT |
1286 | } |
1287 | } | |
1288 | ||
1289 | /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to | |
1290 | make a new object. */ | |
1291 | ||
1292 | static void | |
1293 | construct_visualizer (struct varobj *var, PyObject *constructor) | |
1294 | { | |
1295 | PyObject *pretty_printer; | |
1296 | ||
d65aec65 PM |
1297 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1298 | if (CPLUS_FAKE_CHILD (var)) | |
1299 | return; | |
1300 | ||
0cc7d26f TT |
1301 | Py_INCREF (constructor); |
1302 | if (constructor == Py_None) | |
1303 | pretty_printer = NULL; | |
1304 | else | |
1305 | { | |
1306 | pretty_printer = instantiate_pretty_printer (constructor, var->value); | |
1307 | if (! pretty_printer) | |
1308 | { | |
1309 | gdbpy_print_stack (); | |
1310 | Py_DECREF (constructor); | |
1311 | constructor = Py_None; | |
1312 | Py_INCREF (constructor); | |
1313 | } | |
1314 | ||
1315 | if (pretty_printer == Py_None) | |
1316 | { | |
1317 | Py_DECREF (pretty_printer); | |
1318 | pretty_printer = NULL; | |
1319 | } | |
1320 | } | |
1321 | ||
bb5ce47a | 1322 | install_visualizer (var->dynamic, constructor, pretty_printer); |
0cc7d26f TT |
1323 | } |
1324 | ||
1325 | #endif /* HAVE_PYTHON */ | |
1326 | ||
1327 | /* A helper function for install_new_value. This creates and installs | |
1328 | a visualizer for VAR, if appropriate. */ | |
1329 | ||
1330 | static void | |
1331 | install_new_value_visualizer (struct varobj *var) | |
1332 | { | |
1333 | #if HAVE_PYTHON | |
1334 | /* If the constructor is None, then we want the raw value. If VAR | |
1335 | does not have a value, just skip this. */ | |
0646da15 TT |
1336 | if (!gdb_python_initialized) |
1337 | return; | |
1338 | ||
bb5ce47a | 1339 | if (var->dynamic->constructor != Py_None && var->value != NULL) |
0cc7d26f TT |
1340 | { |
1341 | struct cleanup *cleanup; | |
0cc7d26f TT |
1342 | |
1343 | cleanup = varobj_ensure_python_env (var); | |
1344 | ||
bb5ce47a | 1345 | if (var->dynamic->constructor == NULL) |
0cc7d26f TT |
1346 | install_default_visualizer (var); |
1347 | else | |
bb5ce47a | 1348 | construct_visualizer (var, var->dynamic->constructor); |
0cc7d26f TT |
1349 | |
1350 | do_cleanups (cleanup); | |
1351 | } | |
1352 | #else | |
1353 | /* Do nothing. */ | |
1354 | #endif | |
1355 | } | |
1356 | ||
8264ba82 AG |
1357 | /* When using RTTI to determine variable type it may be changed in runtime when |
1358 | the variable value is changed. This function checks whether type of varobj | |
1359 | VAR will change when a new value NEW_VALUE is assigned and if it is so | |
1360 | updates the type of VAR. */ | |
1361 | ||
1362 | static int | |
1363 | update_type_if_necessary (struct varobj *var, struct value *new_value) | |
1364 | { | |
1365 | if (new_value) | |
1366 | { | |
1367 | struct value_print_options opts; | |
1368 | ||
1369 | get_user_print_options (&opts); | |
1370 | if (opts.objectprint) | |
1371 | { | |
1372 | struct type *new_type; | |
1373 | char *curr_type_str, *new_type_str; | |
1374 | ||
1375 | new_type = value_actual_type (new_value, 0, 0); | |
1376 | new_type_str = type_to_string (new_type); | |
1377 | curr_type_str = varobj_get_type (var); | |
1378 | if (strcmp (curr_type_str, new_type_str) != 0) | |
1379 | { | |
1380 | var->type = new_type; | |
1381 | ||
1382 | /* This information may be not valid for a new type. */ | |
1383 | varobj_delete (var, NULL, 1); | |
1384 | VEC_free (varobj_p, var->children); | |
1385 | var->num_children = -1; | |
1386 | return 1; | |
1387 | } | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | return 0; | |
1392 | } | |
1393 | ||
acd65feb VP |
1394 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
1395 | this is the first assignement after the variable object was just | |
1396 | created, or changed type. In that case, just assign the value | |
1397 | and return 0. | |
581e13c1 MS |
1398 | Otherwise, assign the new value, and return 1 if the value is |
1399 | different from the current one, 0 otherwise. The comparison is | |
1400 | done on textual representation of value. Therefore, some types | |
1401 | need not be compared. E.g. for structures the reported value is | |
1402 | always "{...}", so no comparison is necessary here. If the old | |
1403 | value was NULL and new one is not, or vice versa, we always return 1. | |
b26ed50d VP |
1404 | |
1405 | The VALUE parameter should not be released -- the function will | |
1406 | take care of releasing it when needed. */ | |
acd65feb VP |
1407 | static int |
1408 | install_new_value (struct varobj *var, struct value *value, int initial) | |
1409 | { | |
1410 | int changeable; | |
1411 | int need_to_fetch; | |
1412 | int changed = 0; | |
25d5ea92 | 1413 | int intentionally_not_fetched = 0; |
7a4d50bf | 1414 | char *print_value = NULL; |
acd65feb | 1415 | |
acd65feb | 1416 | /* We need to know the varobj's type to decide if the value should |
3e43a32a | 1417 | be fetched or not. C++ fake children (public/protected/private) |
581e13c1 | 1418 | don't have a type. */ |
acd65feb | 1419 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); |
b2c2bd75 | 1420 | changeable = varobj_value_is_changeable_p (var); |
b6313243 TT |
1421 | |
1422 | /* If the type has custom visualizer, we consider it to be always | |
581e13c1 | 1423 | changeable. FIXME: need to make sure this behaviour will not |
b6313243 | 1424 | mess up read-sensitive values. */ |
bb5ce47a | 1425 | if (var->dynamic->pretty_printer != NULL) |
b6313243 TT |
1426 | changeable = 1; |
1427 | ||
acd65feb VP |
1428 | need_to_fetch = changeable; |
1429 | ||
b26ed50d VP |
1430 | /* We are not interested in the address of references, and given |
1431 | that in C++ a reference is not rebindable, it cannot | |
1432 | meaningfully change. So, get hold of the real value. */ | |
1433 | if (value) | |
0cc7d26f | 1434 | value = coerce_ref (value); |
b26ed50d | 1435 | |
acd65feb VP |
1436 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1437 | /* For unions, we need to fetch the value implicitly because | |
1438 | of implementation of union member fetch. When gdb | |
1439 | creates a value for a field and the value of the enclosing | |
1440 | structure is not lazy, it immediately copies the necessary | |
1441 | bytes from the enclosing values. If the enclosing value is | |
1442 | lazy, the call to value_fetch_lazy on the field will read | |
1443 | the data from memory. For unions, that means we'll read the | |
1444 | same memory more than once, which is not desirable. So | |
1445 | fetch now. */ | |
1446 | need_to_fetch = 1; | |
1447 | ||
1448 | /* The new value might be lazy. If the type is changeable, | |
1449 | that is we'll be comparing values of this type, fetch the | |
1450 | value now. Otherwise, on the next update the old value | |
1451 | will be lazy, which means we've lost that old value. */ | |
1452 | if (need_to_fetch && value && value_lazy (value)) | |
1453 | { | |
25d5ea92 VP |
1454 | struct varobj *parent = var->parent; |
1455 | int frozen = var->frozen; | |
a109c7c1 | 1456 | |
25d5ea92 VP |
1457 | for (; !frozen && parent; parent = parent->parent) |
1458 | frozen |= parent->frozen; | |
1459 | ||
1460 | if (frozen && initial) | |
1461 | { | |
1462 | /* For variables that are frozen, or are children of frozen | |
1463 | variables, we don't do fetch on initial assignment. | |
1464 | For non-initial assignemnt we do the fetch, since it means we're | |
1465 | explicitly asked to compare the new value with the old one. */ | |
1466 | intentionally_not_fetched = 1; | |
1467 | } | |
8e7b59a5 | 1468 | else |
acd65feb | 1469 | { |
8e7b59a5 KS |
1470 | volatile struct gdb_exception except; |
1471 | ||
1472 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
1473 | { | |
1474 | value_fetch_lazy (value); | |
1475 | } | |
1476 | ||
1477 | if (except.reason < 0) | |
1478 | { | |
1479 | /* Set the value to NULL, so that for the next -var-update, | |
1480 | we don't try to compare the new value with this value, | |
1481 | that we couldn't even read. */ | |
1482 | value = NULL; | |
1483 | } | |
acd65feb | 1484 | } |
acd65feb VP |
1485 | } |
1486 | ||
e848a8a5 TT |
1487 | /* Get a reference now, before possibly passing it to any Python |
1488 | code that might release it. */ | |
1489 | if (value != NULL) | |
1490 | value_incref (value); | |
b6313243 | 1491 | |
7a4d50bf VP |
1492 | /* Below, we'll be comparing string rendering of old and new |
1493 | values. Don't get string rendering if the value is | |
1494 | lazy -- if it is, the code above has decided that the value | |
1495 | should not be fetched. */ | |
bb5ce47a YQ |
1496 | if (value != NULL && !value_lazy (value) |
1497 | && var->dynamic->pretty_printer == NULL) | |
99ad9427 | 1498 | print_value = varobj_value_get_print_value (value, var->format, var); |
7a4d50bf | 1499 | |
acd65feb VP |
1500 | /* If the type is changeable, compare the old and the new values. |
1501 | If this is the initial assignment, we don't have any old value | |
1502 | to compare with. */ | |
7a4d50bf | 1503 | if (!initial && changeable) |
acd65feb | 1504 | { |
3e43a32a MS |
1505 | /* If the value of the varobj was changed by -var-set-value, |
1506 | then the value in the varobj and in the target is the same. | |
1507 | However, that value is different from the value that the | |
581e13c1 | 1508 | varobj had after the previous -var-update. So need to the |
3e43a32a | 1509 | varobj as changed. */ |
acd65feb | 1510 | if (var->updated) |
57e66780 | 1511 | { |
57e66780 DJ |
1512 | changed = 1; |
1513 | } | |
bb5ce47a | 1514 | else if (var->dynamic->pretty_printer == NULL) |
acd65feb VP |
1515 | { |
1516 | /* Try to compare the values. That requires that both | |
1517 | values are non-lazy. */ | |
25d5ea92 VP |
1518 | if (var->not_fetched && value_lazy (var->value)) |
1519 | { | |
1520 | /* This is a frozen varobj and the value was never read. | |
1521 | Presumably, UI shows some "never read" indicator. | |
1522 | Now that we've fetched the real value, we need to report | |
1523 | this varobj as changed so that UI can show the real | |
1524 | value. */ | |
1525 | changed = 1; | |
1526 | } | |
1527 | else if (var->value == NULL && value == NULL) | |
581e13c1 | 1528 | /* Equal. */ |
acd65feb VP |
1529 | ; |
1530 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1531 | { |
57e66780 DJ |
1532 | changed = 1; |
1533 | } | |
acd65feb VP |
1534 | else |
1535 | { | |
1536 | gdb_assert (!value_lazy (var->value)); | |
1537 | gdb_assert (!value_lazy (value)); | |
85265413 | 1538 | |
57e66780 | 1539 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1540 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1541 | changed = 1; |
acd65feb VP |
1542 | } |
1543 | } | |
1544 | } | |
85265413 | 1545 | |
ee342b23 VP |
1546 | if (!initial && !changeable) |
1547 | { | |
1548 | /* For values that are not changeable, we don't compare the values. | |
1549 | However, we want to notice if a value was not NULL and now is NULL, | |
1550 | or vise versa, so that we report when top-level varobjs come in scope | |
1551 | and leave the scope. */ | |
1552 | changed = (var->value != NULL) != (value != NULL); | |
1553 | } | |
1554 | ||
acd65feb | 1555 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1556 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1557 | value_free (var->value); |
1558 | var->value = value; | |
25d5ea92 VP |
1559 | if (value && value_lazy (value) && intentionally_not_fetched) |
1560 | var->not_fetched = 1; | |
1561 | else | |
1562 | var->not_fetched = 0; | |
acd65feb | 1563 | var->updated = 0; |
85265413 | 1564 | |
0cc7d26f TT |
1565 | install_new_value_visualizer (var); |
1566 | ||
1567 | /* If we installed a pretty-printer, re-compare the printed version | |
1568 | to see if the variable changed. */ | |
bb5ce47a | 1569 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f TT |
1570 | { |
1571 | xfree (print_value); | |
99ad9427 YQ |
1572 | print_value = varobj_value_get_print_value (var->value, var->format, |
1573 | var); | |
e8f781e2 TT |
1574 | if ((var->print_value == NULL && print_value != NULL) |
1575 | || (var->print_value != NULL && print_value == NULL) | |
1576 | || (var->print_value != NULL && print_value != NULL | |
1577 | && strcmp (var->print_value, print_value) != 0)) | |
0cc7d26f TT |
1578 | changed = 1; |
1579 | } | |
1580 | if (var->print_value) | |
1581 | xfree (var->print_value); | |
1582 | var->print_value = print_value; | |
1583 | ||
b26ed50d | 1584 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1585 | |
1586 | return changed; | |
1587 | } | |
acd65feb | 1588 | |
0cc7d26f TT |
1589 | /* Return the requested range for a varobj. VAR is the varobj. FROM |
1590 | and TO are out parameters; *FROM and *TO will be set to the | |
1591 | selected sub-range of VAR. If no range was selected using | |
1592 | -var-set-update-range, then both will be -1. */ | |
1593 | void | |
1594 | varobj_get_child_range (struct varobj *var, int *from, int *to) | |
b6313243 | 1595 | { |
0cc7d26f TT |
1596 | *from = var->from; |
1597 | *to = var->to; | |
b6313243 TT |
1598 | } |
1599 | ||
0cc7d26f TT |
1600 | /* Set the selected sub-range of children of VAR to start at index |
1601 | FROM and end at index TO. If either FROM or TO is less than zero, | |
1602 | this is interpreted as a request for all children. */ | |
1603 | void | |
1604 | varobj_set_child_range (struct varobj *var, int from, int to) | |
b6313243 | 1605 | { |
0cc7d26f TT |
1606 | var->from = from; |
1607 | var->to = to; | |
b6313243 TT |
1608 | } |
1609 | ||
1610 | void | |
1611 | varobj_set_visualizer (struct varobj *var, const char *visualizer) | |
1612 | { | |
1613 | #if HAVE_PYTHON | |
34fa1d9d MS |
1614 | PyObject *mainmod, *globals, *constructor; |
1615 | struct cleanup *back_to; | |
b6313243 | 1616 | |
0646da15 TT |
1617 | if (!gdb_python_initialized) |
1618 | return; | |
1619 | ||
d452c4bc | 1620 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
1621 | |
1622 | mainmod = PyImport_AddModule ("__main__"); | |
1623 | globals = PyModule_GetDict (mainmod); | |
1624 | Py_INCREF (globals); | |
1625 | make_cleanup_py_decref (globals); | |
1626 | ||
1627 | constructor = PyRun_String (visualizer, Py_eval_input, globals, globals); | |
b6313243 | 1628 | |
0cc7d26f | 1629 | if (! constructor) |
b6313243 TT |
1630 | { |
1631 | gdbpy_print_stack (); | |
da1f2771 | 1632 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
b6313243 TT |
1633 | } |
1634 | ||
0cc7d26f TT |
1635 | construct_visualizer (var, constructor); |
1636 | Py_XDECREF (constructor); | |
b6313243 | 1637 | |
0cc7d26f TT |
1638 | /* If there are any children now, wipe them. */ |
1639 | varobj_delete (var, NULL, 1 /* children only */); | |
1640 | var->num_children = -1; | |
b6313243 TT |
1641 | |
1642 | do_cleanups (back_to); | |
1643 | #else | |
da1f2771 | 1644 | error (_("Python support required")); |
b6313243 TT |
1645 | #endif |
1646 | } | |
1647 | ||
7a290c40 JB |
1648 | /* If NEW_VALUE is the new value of the given varobj (var), return |
1649 | non-zero if var has mutated. In other words, if the type of | |
1650 | the new value is different from the type of the varobj's old | |
1651 | value. | |
1652 | ||
1653 | NEW_VALUE may be NULL, if the varobj is now out of scope. */ | |
1654 | ||
1655 | static int | |
1656 | varobj_value_has_mutated (struct varobj *var, struct value *new_value, | |
1657 | struct type *new_type) | |
1658 | { | |
1659 | /* If we haven't previously computed the number of children in var, | |
1660 | it does not matter from the front-end's perspective whether | |
1661 | the type has mutated or not. For all intents and purposes, | |
1662 | it has not mutated. */ | |
1663 | if (var->num_children < 0) | |
1664 | return 0; | |
1665 | ||
1666 | if (var->root->lang->value_has_mutated) | |
1667 | return var->root->lang->value_has_mutated (var, new_value, new_type); | |
1668 | else | |
1669 | return 0; | |
1670 | } | |
1671 | ||
8b93c638 JM |
1672 | /* Update the values for a variable and its children. This is a |
1673 | two-pronged attack. First, re-parse the value for the root's | |
1674 | expression to see if it's changed. Then go all the way | |
1675 | through its children, reconstructing them and noting if they've | |
1676 | changed. | |
1677 | ||
25d5ea92 VP |
1678 | The EXPLICIT parameter specifies if this call is result |
1679 | of MI request to update this specific variable, or | |
581e13c1 | 1680 | result of implicit -var-update *. For implicit request, we don't |
25d5ea92 | 1681 | update frozen variables. |
705da579 | 1682 | |
581e13c1 | 1683 | NOTE: This function may delete the caller's varobj. If it |
8756216b DP |
1684 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1685 | to point to the new varobj. */ | |
8b93c638 | 1686 | |
1417b39d JB |
1687 | VEC(varobj_update_result) * |
1688 | varobj_update (struct varobj **varp, int explicit) | |
8b93c638 | 1689 | { |
25d5ea92 | 1690 | int type_changed = 0; |
8b93c638 | 1691 | int i; |
30b28db1 | 1692 | struct value *new; |
b6313243 | 1693 | VEC (varobj_update_result) *stack = NULL; |
f7f9ae2c | 1694 | VEC (varobj_update_result) *result = NULL; |
8b93c638 | 1695 | |
25d5ea92 VP |
1696 | /* Frozen means frozen -- we don't check for any change in |
1697 | this varobj, including its going out of scope, or | |
1698 | changing type. One use case for frozen varobjs is | |
1699 | retaining previously evaluated expressions, and we don't | |
1700 | want them to be reevaluated at all. */ | |
1701 | if (!explicit && (*varp)->frozen) | |
f7f9ae2c | 1702 | return result; |
8756216b DP |
1703 | |
1704 | if (!(*varp)->root->is_valid) | |
f7f9ae2c | 1705 | { |
cfce2ea2 | 1706 | varobj_update_result r = {0}; |
a109c7c1 | 1707 | |
cfce2ea2 | 1708 | r.varobj = *varp; |
f7f9ae2c VP |
1709 | r.status = VAROBJ_INVALID; |
1710 | VEC_safe_push (varobj_update_result, result, &r); | |
1711 | return result; | |
1712 | } | |
8b93c638 | 1713 | |
25d5ea92 | 1714 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1715 | { |
cfce2ea2 | 1716 | varobj_update_result r = {0}; |
a109c7c1 | 1717 | |
cfce2ea2 | 1718 | r.varobj = *varp; |
f7f9ae2c VP |
1719 | r.status = VAROBJ_IN_SCOPE; |
1720 | ||
581e13c1 | 1721 | /* Update the root variable. value_of_root can return NULL |
25d5ea92 | 1722 | if the variable is no longer around, i.e. we stepped out of |
581e13c1 | 1723 | the frame in which a local existed. We are letting the |
25d5ea92 VP |
1724 | value_of_root variable dispose of the varobj if the type |
1725 | has changed. */ | |
25d5ea92 | 1726 | new = value_of_root (varp, &type_changed); |
8264ba82 AG |
1727 | if (update_type_if_necessary(*varp, new)) |
1728 | type_changed = 1; | |
f7f9ae2c | 1729 | r.varobj = *varp; |
f7f9ae2c | 1730 | r.type_changed = type_changed; |
ea56f9c2 | 1731 | if (install_new_value ((*varp), new, type_changed)) |
f7f9ae2c | 1732 | r.changed = 1; |
ea56f9c2 | 1733 | |
25d5ea92 | 1734 | if (new == NULL) |
f7f9ae2c | 1735 | r.status = VAROBJ_NOT_IN_SCOPE; |
b6313243 | 1736 | r.value_installed = 1; |
f7f9ae2c VP |
1737 | |
1738 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
b6313243 | 1739 | { |
0b4bc29a JK |
1740 | if (r.type_changed || r.changed) |
1741 | VEC_safe_push (varobj_update_result, result, &r); | |
b6313243 TT |
1742 | return result; |
1743 | } | |
1744 | ||
1745 | VEC_safe_push (varobj_update_result, stack, &r); | |
1746 | } | |
1747 | else | |
1748 | { | |
cfce2ea2 | 1749 | varobj_update_result r = {0}; |
a109c7c1 | 1750 | |
cfce2ea2 | 1751 | r.varobj = *varp; |
b6313243 | 1752 | VEC_safe_push (varobj_update_result, stack, &r); |
b20d8971 | 1753 | } |
8b93c638 | 1754 | |
8756216b | 1755 | /* Walk through the children, reconstructing them all. */ |
b6313243 | 1756 | while (!VEC_empty (varobj_update_result, stack)) |
8b93c638 | 1757 | { |
b6313243 TT |
1758 | varobj_update_result r = *(VEC_last (varobj_update_result, stack)); |
1759 | struct varobj *v = r.varobj; | |
1760 | ||
1761 | VEC_pop (varobj_update_result, stack); | |
1762 | ||
1763 | /* Update this variable, unless it's a root, which is already | |
1764 | updated. */ | |
1765 | if (!r.value_installed) | |
7a290c40 JB |
1766 | { |
1767 | struct type *new_type; | |
1768 | ||
b6313243 | 1769 | new = value_of_child (v->parent, v->index); |
8264ba82 AG |
1770 | if (update_type_if_necessary(v, new)) |
1771 | r.type_changed = 1; | |
7a290c40 JB |
1772 | if (new) |
1773 | new_type = value_type (new); | |
1774 | else | |
1775 | new_type = v->root->lang->type_of_child (v->parent, v->index); | |
1776 | ||
1777 | if (varobj_value_has_mutated (v, new, new_type)) | |
1778 | { | |
1779 | /* The children are no longer valid; delete them now. | |
1780 | Report the fact that its type changed as well. */ | |
1781 | varobj_delete (v, NULL, 1 /* only_children */); | |
1782 | v->num_children = -1; | |
1783 | v->to = -1; | |
1784 | v->from = -1; | |
1785 | v->type = new_type; | |
1786 | r.type_changed = 1; | |
1787 | } | |
1788 | ||
1789 | if (install_new_value (v, new, r.type_changed)) | |
b6313243 TT |
1790 | { |
1791 | r.changed = 1; | |
1792 | v->updated = 0; | |
1793 | } | |
1794 | } | |
1795 | ||
1796 | /* We probably should not get children of a varobj that has a | |
1797 | pretty-printer, but for which -var-list-children was never | |
581e13c1 | 1798 | invoked. */ |
bb5ce47a | 1799 | if (v->dynamic->pretty_printer != NULL) |
b6313243 | 1800 | { |
8264ba82 AG |
1801 | VEC (varobj_p) *changed = 0, *type_changed = 0, *unchanged = 0; |
1802 | VEC (varobj_p) *new = 0; | |
26f9bcee | 1803 | int i, children_changed = 0; |
b6313243 TT |
1804 | |
1805 | if (v->frozen) | |
1806 | continue; | |
1807 | ||
bb5ce47a | 1808 | if (!v->dynamic->children_requested) |
0cc7d26f TT |
1809 | { |
1810 | int dummy; | |
1811 | ||
1812 | /* If we initially did not have potential children, but | |
1813 | now we do, consider the varobj as changed. | |
1814 | Otherwise, if children were never requested, consider | |
1815 | it as unchanged -- presumably, such varobj is not yet | |
1816 | expanded in the UI, so we need not bother getting | |
1817 | it. */ | |
1818 | if (!varobj_has_more (v, 0)) | |
1819 | { | |
8264ba82 | 1820 | update_dynamic_varobj_children (v, NULL, NULL, NULL, NULL, |
0cc7d26f TT |
1821 | &dummy, 0, 0, 0); |
1822 | if (varobj_has_more (v, 0)) | |
1823 | r.changed = 1; | |
1824 | } | |
1825 | ||
1826 | if (r.changed) | |
1827 | VEC_safe_push (varobj_update_result, result, &r); | |
1828 | ||
1829 | continue; | |
1830 | } | |
1831 | ||
b6313243 TT |
1832 | /* If update_dynamic_varobj_children returns 0, then we have |
1833 | a non-conforming pretty-printer, so we skip it. */ | |
8264ba82 AG |
1834 | if (update_dynamic_varobj_children (v, &changed, &type_changed, &new, |
1835 | &unchanged, &children_changed, 1, | |
0cc7d26f | 1836 | v->from, v->to)) |
b6313243 | 1837 | { |
0cc7d26f | 1838 | if (children_changed || new) |
b6313243 | 1839 | { |
0cc7d26f TT |
1840 | r.children_changed = 1; |
1841 | r.new = new; | |
b6313243 | 1842 | } |
0cc7d26f TT |
1843 | /* Push in reverse order so that the first child is |
1844 | popped from the work stack first, and so will be | |
1845 | added to result first. This does not affect | |
1846 | correctness, just "nicer". */ | |
8264ba82 AG |
1847 | for (i = VEC_length (varobj_p, type_changed) - 1; i >= 0; --i) |
1848 | { | |
1849 | varobj_p tmp = VEC_index (varobj_p, type_changed, i); | |
1850 | varobj_update_result r = {0}; | |
1851 | ||
1852 | /* Type may change only if value was changed. */ | |
1853 | r.varobj = tmp; | |
1854 | r.changed = 1; | |
1855 | r.type_changed = 1; | |
1856 | r.value_installed = 1; | |
1857 | VEC_safe_push (varobj_update_result, stack, &r); | |
1858 | } | |
0cc7d26f | 1859 | for (i = VEC_length (varobj_p, changed) - 1; i >= 0; --i) |
b6313243 | 1860 | { |
0cc7d26f | 1861 | varobj_p tmp = VEC_index (varobj_p, changed, i); |
cfce2ea2 | 1862 | varobj_update_result r = {0}; |
a109c7c1 | 1863 | |
cfce2ea2 | 1864 | r.varobj = tmp; |
0cc7d26f | 1865 | r.changed = 1; |
b6313243 TT |
1866 | r.value_installed = 1; |
1867 | VEC_safe_push (varobj_update_result, stack, &r); | |
1868 | } | |
0cc7d26f TT |
1869 | for (i = VEC_length (varobj_p, unchanged) - 1; i >= 0; --i) |
1870 | { | |
1871 | varobj_p tmp = VEC_index (varobj_p, unchanged, i); | |
a109c7c1 | 1872 | |
0cc7d26f TT |
1873 | if (!tmp->frozen) |
1874 | { | |
cfce2ea2 | 1875 | varobj_update_result r = {0}; |
a109c7c1 | 1876 | |
cfce2ea2 | 1877 | r.varobj = tmp; |
0cc7d26f TT |
1878 | r.value_installed = 1; |
1879 | VEC_safe_push (varobj_update_result, stack, &r); | |
1880 | } | |
1881 | } | |
b6313243 TT |
1882 | if (r.changed || r.children_changed) |
1883 | VEC_safe_push (varobj_update_result, result, &r); | |
0cc7d26f | 1884 | |
8264ba82 AG |
1885 | /* Free CHANGED, TYPE_CHANGED and UNCHANGED, but not NEW, |
1886 | because NEW has been put into the result vector. */ | |
0cc7d26f | 1887 | VEC_free (varobj_p, changed); |
8264ba82 | 1888 | VEC_free (varobj_p, type_changed); |
0cc7d26f TT |
1889 | VEC_free (varobj_p, unchanged); |
1890 | ||
b6313243 TT |
1891 | continue; |
1892 | } | |
1893 | } | |
28335dcc VP |
1894 | |
1895 | /* Push any children. Use reverse order so that the first | |
1896 | child is popped from the work stack first, and so | |
1897 | will be added to result first. This does not | |
1898 | affect correctness, just "nicer". */ | |
1899 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1900 | { |
28335dcc | 1901 | varobj_p c = VEC_index (varobj_p, v->children, i); |
a109c7c1 | 1902 | |
28335dcc | 1903 | /* Child may be NULL if explicitly deleted by -var-delete. */ |
25d5ea92 | 1904 | if (c != NULL && !c->frozen) |
28335dcc | 1905 | { |
cfce2ea2 | 1906 | varobj_update_result r = {0}; |
a109c7c1 | 1907 | |
cfce2ea2 | 1908 | r.varobj = c; |
b6313243 | 1909 | VEC_safe_push (varobj_update_result, stack, &r); |
28335dcc | 1910 | } |
8b93c638 | 1911 | } |
b6313243 TT |
1912 | |
1913 | if (r.changed || r.type_changed) | |
1914 | VEC_safe_push (varobj_update_result, result, &r); | |
8b93c638 JM |
1915 | } |
1916 | ||
b6313243 TT |
1917 | VEC_free (varobj_update_result, stack); |
1918 | ||
f7f9ae2c | 1919 | return result; |
8b93c638 JM |
1920 | } |
1921 | \f | |
1922 | ||
1923 | /* Helper functions */ | |
1924 | ||
1925 | /* | |
1926 | * Variable object construction/destruction | |
1927 | */ | |
1928 | ||
1929 | static int | |
fba45db2 KB |
1930 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1931 | int only_children_p) | |
8b93c638 JM |
1932 | { |
1933 | int delcount = 0; | |
1934 | ||
1935 | delete_variable_1 (resultp, &delcount, var, | |
1936 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1937 | ||
1938 | return delcount; | |
1939 | } | |
1940 | ||
581e13c1 | 1941 | /* Delete the variable object VAR and its children. */ |
8b93c638 JM |
1942 | /* IMPORTANT NOTE: If we delete a variable which is a child |
1943 | and the parent is not removed we dump core. It must be always | |
581e13c1 | 1944 | initially called with remove_from_parent_p set. */ |
8b93c638 | 1945 | static void |
72330bd6 AC |
1946 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1947 | struct varobj *var, int only_children_p, | |
1948 | int remove_from_parent_p) | |
8b93c638 | 1949 | { |
28335dcc | 1950 | int i; |
8b93c638 | 1951 | |
581e13c1 | 1952 | /* Delete any children of this variable, too. */ |
28335dcc VP |
1953 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1954 | { | |
1955 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
a109c7c1 | 1956 | |
214270ab VP |
1957 | if (!child) |
1958 | continue; | |
8b93c638 | 1959 | if (!remove_from_parent_p) |
28335dcc VP |
1960 | child->parent = NULL; |
1961 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1962 | } |
28335dcc | 1963 | VEC_free (varobj_p, var->children); |
8b93c638 | 1964 | |
581e13c1 | 1965 | /* if we were called to delete only the children we are done here. */ |
8b93c638 JM |
1966 | if (only_children_p) |
1967 | return; | |
1968 | ||
581e13c1 | 1969 | /* Otherwise, add it to the list of deleted ones and proceed to do so. */ |
73a93a32 | 1970 | /* If the name is null, this is a temporary variable, that has not |
581e13c1 | 1971 | yet been installed, don't report it, it belongs to the caller... */ |
73a93a32 | 1972 | if (var->obj_name != NULL) |
8b93c638 | 1973 | { |
5b616ba1 | 1974 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1975 | *delcountp = *delcountp + 1; |
1976 | } | |
1977 | ||
581e13c1 | 1978 | /* If this variable has a parent, remove it from its parent's list. */ |
8b93c638 JM |
1979 | /* OPTIMIZATION: if the parent of this variable is also being deleted, |
1980 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1981 | expensive list search to find the element to remove when we are | |
581e13c1 | 1982 | discarding the list afterwards. */ |
72330bd6 | 1983 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1984 | { |
28335dcc | 1985 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1986 | } |
72330bd6 | 1987 | |
73a93a32 JI |
1988 | if (var->obj_name != NULL) |
1989 | uninstall_variable (var); | |
8b93c638 | 1990 | |
581e13c1 | 1991 | /* Free memory associated with this variable. */ |
8b93c638 JM |
1992 | free_variable (var); |
1993 | } | |
1994 | ||
581e13c1 | 1995 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ |
8b93c638 | 1996 | static int |
fba45db2 | 1997 | install_variable (struct varobj *var) |
8b93c638 JM |
1998 | { |
1999 | struct vlist *cv; | |
2000 | struct vlist *newvl; | |
2001 | const char *chp; | |
2002 | unsigned int index = 0; | |
2003 | unsigned int i = 1; | |
2004 | ||
2005 | for (chp = var->obj_name; *chp; chp++) | |
2006 | { | |
2007 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
2008 | } | |
2009 | ||
2010 | cv = *(varobj_table + index); | |
2011 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
2012 | cv = cv->next; | |
2013 | ||
2014 | if (cv != NULL) | |
8a3fe4f8 | 2015 | error (_("Duplicate variable object name")); |
8b93c638 | 2016 | |
581e13c1 | 2017 | /* Add varobj to hash table. */ |
8b93c638 JM |
2018 | newvl = xmalloc (sizeof (struct vlist)); |
2019 | newvl->next = *(varobj_table + index); | |
2020 | newvl->var = var; | |
2021 | *(varobj_table + index) = newvl; | |
2022 | ||
581e13c1 | 2023 | /* If root, add varobj to root list. */ |
b2c2bd75 | 2024 | if (is_root_p (var)) |
8b93c638 | 2025 | { |
581e13c1 | 2026 | /* Add to list of root variables. */ |
8b93c638 JM |
2027 | if (rootlist == NULL) |
2028 | var->root->next = NULL; | |
2029 | else | |
2030 | var->root->next = rootlist; | |
2031 | rootlist = var->root; | |
8b93c638 JM |
2032 | } |
2033 | ||
2034 | return 1; /* OK */ | |
2035 | } | |
2036 | ||
581e13c1 | 2037 | /* Unistall the object VAR. */ |
8b93c638 | 2038 | static void |
fba45db2 | 2039 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
2040 | { |
2041 | struct vlist *cv; | |
2042 | struct vlist *prev; | |
2043 | struct varobj_root *cr; | |
2044 | struct varobj_root *prer; | |
2045 | const char *chp; | |
2046 | unsigned int index = 0; | |
2047 | unsigned int i = 1; | |
2048 | ||
581e13c1 | 2049 | /* Remove varobj from hash table. */ |
8b93c638 JM |
2050 | for (chp = var->obj_name; *chp; chp++) |
2051 | { | |
2052 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
2053 | } | |
2054 | ||
2055 | cv = *(varobj_table + index); | |
2056 | prev = NULL; | |
2057 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
2058 | { | |
2059 | prev = cv; | |
2060 | cv = cv->next; | |
2061 | } | |
2062 | ||
2063 | if (varobjdebug) | |
2064 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
2065 | ||
2066 | if (cv == NULL) | |
2067 | { | |
72330bd6 AC |
2068 | warning |
2069 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
2070 | var->obj_name); | |
8b93c638 JM |
2071 | return; |
2072 | } | |
2073 | ||
2074 | if (prev == NULL) | |
2075 | *(varobj_table + index) = cv->next; | |
2076 | else | |
2077 | prev->next = cv->next; | |
2078 | ||
b8c9b27d | 2079 | xfree (cv); |
8b93c638 | 2080 | |
581e13c1 | 2081 | /* If root, remove varobj from root list. */ |
b2c2bd75 | 2082 | if (is_root_p (var)) |
8b93c638 | 2083 | { |
581e13c1 | 2084 | /* Remove from list of root variables. */ |
8b93c638 JM |
2085 | if (rootlist == var->root) |
2086 | rootlist = var->root->next; | |
2087 | else | |
2088 | { | |
2089 | prer = NULL; | |
2090 | cr = rootlist; | |
2091 | while ((cr != NULL) && (cr->rootvar != var)) | |
2092 | { | |
2093 | prer = cr; | |
2094 | cr = cr->next; | |
2095 | } | |
2096 | if (cr == NULL) | |
2097 | { | |
8f7e195f JB |
2098 | warning (_("Assertion failed: Could not find " |
2099 | "varobj \"%s\" in root list"), | |
3e43a32a | 2100 | var->obj_name); |
8b93c638 JM |
2101 | return; |
2102 | } | |
2103 | if (prer == NULL) | |
2104 | rootlist = NULL; | |
2105 | else | |
2106 | prer->next = cr->next; | |
2107 | } | |
8b93c638 JM |
2108 | } |
2109 | ||
2110 | } | |
2111 | ||
581e13c1 | 2112 | /* Create and install a child of the parent of the given name. */ |
8b93c638 | 2113 | static struct varobj * |
fba45db2 | 2114 | create_child (struct varobj *parent, int index, char *name) |
b6313243 TT |
2115 | { |
2116 | return create_child_with_value (parent, index, name, | |
2117 | value_of_child (parent, index)); | |
2118 | } | |
2119 | ||
2120 | static struct varobj * | |
5e5ac9a5 | 2121 | create_child_with_value (struct varobj *parent, int index, char *name, |
b6313243 | 2122 | struct value *value) |
8b93c638 JM |
2123 | { |
2124 | struct varobj *child; | |
2125 | char *childs_name; | |
2126 | ||
2127 | child = new_variable (); | |
2128 | ||
5e5ac9a5 YQ |
2129 | /* NAME is allocated by caller. */ |
2130 | child->name = name; | |
8b93c638 | 2131 | child->index = index; |
8b93c638 JM |
2132 | child->parent = parent; |
2133 | child->root = parent->root; | |
85254831 | 2134 | |
99ad9427 | 2135 | if (varobj_is_anonymous_child (child)) |
85254831 KS |
2136 | childs_name = xstrprintf ("%s.%d_anonymous", parent->obj_name, index); |
2137 | else | |
2138 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); | |
8b93c638 | 2139 | child->obj_name = childs_name; |
85254831 | 2140 | |
8b93c638 JM |
2141 | install_variable (child); |
2142 | ||
acd65feb VP |
2143 | /* Compute the type of the child. Must do this before |
2144 | calling install_new_value. */ | |
2145 | if (value != NULL) | |
2146 | /* If the child had no evaluation errors, var->value | |
581e13c1 | 2147 | will be non-NULL and contain a valid type. */ |
8264ba82 | 2148 | child->type = value_actual_type (value, 0, NULL); |
acd65feb | 2149 | else |
581e13c1 | 2150 | /* Otherwise, we must compute the type. */ |
acd65feb VP |
2151 | child->type = (*child->root->lang->type_of_child) (child->parent, |
2152 | child->index); | |
2153 | install_new_value (child, value, 1); | |
2154 | ||
8b93c638 JM |
2155 | return child; |
2156 | } | |
8b93c638 JM |
2157 | \f |
2158 | ||
2159 | /* | |
2160 | * Miscellaneous utility functions. | |
2161 | */ | |
2162 | ||
581e13c1 | 2163 | /* Allocate memory and initialize a new variable. */ |
8b93c638 JM |
2164 | static struct varobj * |
2165 | new_variable (void) | |
2166 | { | |
2167 | struct varobj *var; | |
2168 | ||
2169 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
2170 | var->name = NULL; | |
02142340 | 2171 | var->path_expr = NULL; |
8b93c638 JM |
2172 | var->obj_name = NULL; |
2173 | var->index = -1; | |
2174 | var->type = NULL; | |
2175 | var->value = NULL; | |
8b93c638 JM |
2176 | var->num_children = -1; |
2177 | var->parent = NULL; | |
2178 | var->children = NULL; | |
2179 | var->format = 0; | |
2180 | var->root = NULL; | |
fb9b6b35 | 2181 | var->updated = 0; |
85265413 | 2182 | var->print_value = NULL; |
25d5ea92 VP |
2183 | var->frozen = 0; |
2184 | var->not_fetched = 0; | |
bb5ce47a YQ |
2185 | var->dynamic |
2186 | = (struct varobj_dynamic *) xmalloc (sizeof (struct varobj_dynamic)); | |
2187 | var->dynamic->children_requested = 0; | |
0cc7d26f TT |
2188 | var->from = -1; |
2189 | var->to = -1; | |
bb5ce47a YQ |
2190 | var->dynamic->constructor = 0; |
2191 | var->dynamic->pretty_printer = 0; | |
2192 | var->dynamic->child_iter = 0; | |
2193 | var->dynamic->saved_item = 0; | |
8b93c638 JM |
2194 | |
2195 | return var; | |
2196 | } | |
2197 | ||
581e13c1 | 2198 | /* Allocate memory and initialize a new root variable. */ |
8b93c638 JM |
2199 | static struct varobj * |
2200 | new_root_variable (void) | |
2201 | { | |
2202 | struct varobj *var = new_variable (); | |
a109c7c1 | 2203 | |
3e43a32a | 2204 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root)); |
8b93c638 JM |
2205 | var->root->lang = NULL; |
2206 | var->root->exp = NULL; | |
2207 | var->root->valid_block = NULL; | |
7a424e99 | 2208 | var->root->frame = null_frame_id; |
a5defcdc | 2209 | var->root->floating = 0; |
8b93c638 | 2210 | var->root->rootvar = NULL; |
8756216b | 2211 | var->root->is_valid = 1; |
8b93c638 JM |
2212 | |
2213 | return var; | |
2214 | } | |
2215 | ||
581e13c1 | 2216 | /* Free any allocated memory associated with VAR. */ |
8b93c638 | 2217 | static void |
fba45db2 | 2218 | free_variable (struct varobj *var) |
8b93c638 | 2219 | { |
d452c4bc | 2220 | #if HAVE_PYTHON |
bb5ce47a | 2221 | if (var->dynamic->pretty_printer != NULL) |
d452c4bc UW |
2222 | { |
2223 | struct cleanup *cleanup = varobj_ensure_python_env (var); | |
bb5ce47a YQ |
2224 | |
2225 | Py_XDECREF (var->dynamic->constructor); | |
2226 | Py_XDECREF (var->dynamic->pretty_printer); | |
2227 | Py_XDECREF (var->dynamic->child_iter); | |
2228 | Py_XDECREF (var->dynamic->saved_item); | |
d452c4bc UW |
2229 | do_cleanups (cleanup); |
2230 | } | |
2231 | #endif | |
2232 | ||
36746093 JK |
2233 | value_free (var->value); |
2234 | ||
581e13c1 | 2235 | /* Free the expression if this is a root variable. */ |
b2c2bd75 | 2236 | if (is_root_p (var)) |
8b93c638 | 2237 | { |
3038237c | 2238 | xfree (var->root->exp); |
8038e1e2 | 2239 | xfree (var->root); |
8b93c638 JM |
2240 | } |
2241 | ||
8038e1e2 AC |
2242 | xfree (var->name); |
2243 | xfree (var->obj_name); | |
85265413 | 2244 | xfree (var->print_value); |
02142340 | 2245 | xfree (var->path_expr); |
bb5ce47a | 2246 | xfree (var->dynamic); |
8038e1e2 | 2247 | xfree (var); |
8b93c638 JM |
2248 | } |
2249 | ||
74b7792f AC |
2250 | static void |
2251 | do_free_variable_cleanup (void *var) | |
2252 | { | |
2253 | free_variable (var); | |
2254 | } | |
2255 | ||
2256 | static struct cleanup * | |
2257 | make_cleanup_free_variable (struct varobj *var) | |
2258 | { | |
2259 | return make_cleanup (do_free_variable_cleanup, var); | |
2260 | } | |
2261 | ||
6e2a9270 VP |
2262 | /* Return the type of the value that's stored in VAR, |
2263 | or that would have being stored there if the | |
581e13c1 | 2264 | value were accessible. |
6e2a9270 VP |
2265 | |
2266 | This differs from VAR->type in that VAR->type is always | |
2267 | the true type of the expession in the source language. | |
2268 | The return value of this function is the type we're | |
2269 | actually storing in varobj, and using for displaying | |
2270 | the values and for comparing previous and new values. | |
2271 | ||
2272 | For example, top-level references are always stripped. */ | |
99ad9427 YQ |
2273 | struct type * |
2274 | varobj_get_value_type (struct varobj *var) | |
6e2a9270 VP |
2275 | { |
2276 | struct type *type; | |
2277 | ||
2278 | if (var->value) | |
2279 | type = value_type (var->value); | |
2280 | else | |
2281 | type = var->type; | |
2282 | ||
2283 | type = check_typedef (type); | |
2284 | ||
2285 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
2286 | type = get_target_type (type); | |
2287 | ||
2288 | type = check_typedef (type); | |
2289 | ||
2290 | return type; | |
2291 | } | |
2292 | ||
8b93c638 | 2293 | /* What is the default display for this variable? We assume that |
581e13c1 | 2294 | everything is "natural". Any exceptions? */ |
8b93c638 | 2295 | static enum varobj_display_formats |
fba45db2 | 2296 | variable_default_display (struct varobj *var) |
8b93c638 JM |
2297 | { |
2298 | return FORMAT_NATURAL; | |
2299 | } | |
2300 | ||
581e13c1 | 2301 | /* FIXME: The following should be generic for any pointer. */ |
8b93c638 | 2302 | static void |
fba45db2 | 2303 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
2304 | { |
2305 | struct cpstack *s; | |
2306 | ||
2307 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
2308 | s->name = name; | |
2309 | s->next = *pstack; | |
2310 | *pstack = s; | |
2311 | } | |
2312 | ||
581e13c1 | 2313 | /* FIXME: The following should be generic for any pointer. */ |
8b93c638 | 2314 | static char * |
fba45db2 | 2315 | cppop (struct cpstack **pstack) |
8b93c638 JM |
2316 | { |
2317 | struct cpstack *s; | |
2318 | char *v; | |
2319 | ||
2320 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
2321 | return NULL; | |
2322 | ||
2323 | s = *pstack; | |
2324 | v = s->name; | |
2325 | *pstack = (*pstack)->next; | |
b8c9b27d | 2326 | xfree (s); |
8b93c638 JM |
2327 | |
2328 | return v; | |
2329 | } | |
2330 | \f | |
2331 | /* | |
2332 | * Language-dependencies | |
2333 | */ | |
2334 | ||
2335 | /* Common entry points */ | |
2336 | ||
581e13c1 | 2337 | /* Get the language of variable VAR. */ |
8b93c638 | 2338 | static enum varobj_languages |
fba45db2 | 2339 | variable_language (struct varobj *var) |
8b93c638 JM |
2340 | { |
2341 | enum varobj_languages lang; | |
2342 | ||
2343 | switch (var->root->exp->language_defn->la_language) | |
2344 | { | |
2345 | default: | |
2346 | case language_c: | |
2347 | lang = vlang_c; | |
2348 | break; | |
2349 | case language_cplus: | |
2350 | lang = vlang_cplus; | |
2351 | break; | |
2352 | case language_java: | |
2353 | lang = vlang_java; | |
2354 | break; | |
40591b7d JCD |
2355 | case language_ada: |
2356 | lang = vlang_ada; | |
2357 | break; | |
8b93c638 JM |
2358 | } |
2359 | ||
2360 | return lang; | |
2361 | } | |
2362 | ||
2363 | /* Return the number of children for a given variable. | |
2364 | The result of this function is defined by the language | |
581e13c1 | 2365 | implementation. The number of children returned by this function |
8b93c638 | 2366 | is the number of children that the user will see in the variable |
581e13c1 | 2367 | display. */ |
8b93c638 | 2368 | static int |
fba45db2 | 2369 | number_of_children (struct varobj *var) |
8b93c638 | 2370 | { |
82ae4854 | 2371 | return (*var->root->lang->number_of_children) (var); |
8b93c638 JM |
2372 | } |
2373 | ||
3e43a32a | 2374 | /* What is the expression for the root varobj VAR? Returns a malloc'd |
581e13c1 | 2375 | string. */ |
8b93c638 | 2376 | static char * |
fba45db2 | 2377 | name_of_variable (struct varobj *var) |
8b93c638 JM |
2378 | { |
2379 | return (*var->root->lang->name_of_variable) (var); | |
2380 | } | |
2381 | ||
3e43a32a | 2382 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd |
581e13c1 | 2383 | string. */ |
8b93c638 | 2384 | static char * |
fba45db2 | 2385 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
2386 | { |
2387 | return (*var->root->lang->name_of_child) (var, index); | |
2388 | } | |
2389 | ||
2213e2be YQ |
2390 | /* If frame associated with VAR can be found, switch |
2391 | to it and return 1. Otherwise, return 0. */ | |
2392 | ||
2393 | static int | |
2394 | check_scope (struct varobj *var) | |
2395 | { | |
2396 | struct frame_info *fi; | |
2397 | int scope; | |
2398 | ||
2399 | fi = frame_find_by_id (var->root->frame); | |
2400 | scope = fi != NULL; | |
2401 | ||
2402 | if (fi) | |
2403 | { | |
2404 | CORE_ADDR pc = get_frame_pc (fi); | |
2405 | ||
2406 | if (pc < BLOCK_START (var->root->valid_block) || | |
2407 | pc >= BLOCK_END (var->root->valid_block)) | |
2408 | scope = 0; | |
2409 | else | |
2410 | select_frame (fi); | |
2411 | } | |
2412 | return scope; | |
2413 | } | |
2414 | ||
2415 | /* Helper function to value_of_root. */ | |
2416 | ||
2417 | static struct value * | |
2418 | value_of_root_1 (struct varobj **var_handle) | |
2419 | { | |
2420 | struct value *new_val = NULL; | |
2421 | struct varobj *var = *var_handle; | |
2422 | int within_scope = 0; | |
2423 | struct cleanup *back_to; | |
2424 | ||
2425 | /* Only root variables can be updated... */ | |
2426 | if (!is_root_p (var)) | |
2427 | /* Not a root var. */ | |
2428 | return NULL; | |
2429 | ||
2430 | back_to = make_cleanup_restore_current_thread (); | |
2431 | ||
2432 | /* Determine whether the variable is still around. */ | |
2433 | if (var->root->valid_block == NULL || var->root->floating) | |
2434 | within_scope = 1; | |
2435 | else if (var->root->thread_id == 0) | |
2436 | { | |
2437 | /* The program was single-threaded when the variable object was | |
2438 | created. Technically, it's possible that the program became | |
2439 | multi-threaded since then, but we don't support such | |
2440 | scenario yet. */ | |
2441 | within_scope = check_scope (var); | |
2442 | } | |
2443 | else | |
2444 | { | |
2445 | ptid_t ptid = thread_id_to_pid (var->root->thread_id); | |
2446 | if (in_thread_list (ptid)) | |
2447 | { | |
2448 | switch_to_thread (ptid); | |
2449 | within_scope = check_scope (var); | |
2450 | } | |
2451 | } | |
2452 | ||
2453 | if (within_scope) | |
2454 | { | |
2455 | volatile struct gdb_exception except; | |
2456 | ||
2457 | /* We need to catch errors here, because if evaluate | |
2458 | expression fails we want to just return NULL. */ | |
2459 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
2460 | { | |
2461 | new_val = evaluate_expression (var->root->exp); | |
2462 | } | |
2463 | } | |
2464 | ||
2465 | do_cleanups (back_to); | |
2466 | ||
2467 | return new_val; | |
2468 | } | |
2469 | ||
a5defcdc VP |
2470 | /* What is the ``struct value *'' of the root variable VAR? |
2471 | For floating variable object, evaluation can get us a value | |
2472 | of different type from what is stored in varobj already. In | |
2473 | that case: | |
2474 | - *type_changed will be set to 1 | |
2475 | - old varobj will be freed, and new one will be | |
2476 | created, with the same name. | |
2477 | - *var_handle will be set to the new varobj | |
2478 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 2479 | static struct value * |
fba45db2 | 2480 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 2481 | { |
73a93a32 JI |
2482 | struct varobj *var; |
2483 | ||
2484 | if (var_handle == NULL) | |
2485 | return NULL; | |
2486 | ||
2487 | var = *var_handle; | |
2488 | ||
2489 | /* This should really be an exception, since this should | |
581e13c1 | 2490 | only get called with a root variable. */ |
73a93a32 | 2491 | |
b2c2bd75 | 2492 | if (!is_root_p (var)) |
73a93a32 JI |
2493 | return NULL; |
2494 | ||
a5defcdc | 2495 | if (var->root->floating) |
73a93a32 JI |
2496 | { |
2497 | struct varobj *tmp_var; | |
2498 | char *old_type, *new_type; | |
6225abfa | 2499 | |
73a93a32 JI |
2500 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
2501 | USE_SELECTED_FRAME); | |
2502 | if (tmp_var == NULL) | |
2503 | { | |
2504 | return NULL; | |
2505 | } | |
6225abfa | 2506 | old_type = varobj_get_type (var); |
73a93a32 | 2507 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 2508 | if (strcmp (old_type, new_type) == 0) |
73a93a32 | 2509 | { |
fcacd99f VP |
2510 | /* The expression presently stored inside var->root->exp |
2511 | remembers the locations of local variables relatively to | |
2512 | the frame where the expression was created (in DWARF location | |
2513 | button, for example). Naturally, those locations are not | |
2514 | correct in other frames, so update the expression. */ | |
2515 | ||
2516 | struct expression *tmp_exp = var->root->exp; | |
a109c7c1 | 2517 | |
fcacd99f VP |
2518 | var->root->exp = tmp_var->root->exp; |
2519 | tmp_var->root->exp = tmp_exp; | |
2520 | ||
73a93a32 JI |
2521 | varobj_delete (tmp_var, NULL, 0); |
2522 | *type_changed = 0; | |
2523 | } | |
2524 | else | |
2525 | { | |
1b36a34b | 2526 | tmp_var->obj_name = xstrdup (var->obj_name); |
0cc7d26f TT |
2527 | tmp_var->from = var->from; |
2528 | tmp_var->to = var->to; | |
a5defcdc VP |
2529 | varobj_delete (var, NULL, 0); |
2530 | ||
73a93a32 JI |
2531 | install_variable (tmp_var); |
2532 | *var_handle = tmp_var; | |
705da579 | 2533 | var = *var_handle; |
73a93a32 JI |
2534 | *type_changed = 1; |
2535 | } | |
74dddad3 MS |
2536 | xfree (old_type); |
2537 | xfree (new_type); | |
73a93a32 JI |
2538 | } |
2539 | else | |
2540 | { | |
2541 | *type_changed = 0; | |
2542 | } | |
2543 | ||
7a290c40 JB |
2544 | { |
2545 | struct value *value; | |
2546 | ||
2213e2be | 2547 | value = value_of_root_1 (var_handle); |
7a290c40 JB |
2548 | if (var->value == NULL || value == NULL) |
2549 | { | |
2550 | /* For root varobj-s, a NULL value indicates a scoping issue. | |
2551 | So, nothing to do in terms of checking for mutations. */ | |
2552 | } | |
2553 | else if (varobj_value_has_mutated (var, value, value_type (value))) | |
2554 | { | |
2555 | /* The type has mutated, so the children are no longer valid. | |
2556 | Just delete them, and tell our caller that the type has | |
2557 | changed. */ | |
2558 | varobj_delete (var, NULL, 1 /* only_children */); | |
2559 | var->num_children = -1; | |
2560 | var->to = -1; | |
2561 | var->from = -1; | |
2562 | *type_changed = 1; | |
2563 | } | |
2564 | return value; | |
2565 | } | |
8b93c638 JM |
2566 | } |
2567 | ||
581e13c1 | 2568 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
30b28db1 | 2569 | static struct value * |
fba45db2 | 2570 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 2571 | { |
30b28db1 | 2572 | struct value *value; |
8b93c638 JM |
2573 | |
2574 | value = (*parent->root->lang->value_of_child) (parent, index); | |
2575 | ||
8b93c638 JM |
2576 | return value; |
2577 | } | |
2578 | ||
581e13c1 | 2579 | /* GDB already has a command called "value_of_variable". Sigh. */ |
8b93c638 | 2580 | static char * |
de051565 | 2581 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2582 | { |
8756216b | 2583 | if (var->root->is_valid) |
0cc7d26f | 2584 | { |
bb5ce47a | 2585 | if (var->dynamic->pretty_printer != NULL) |
99ad9427 | 2586 | return varobj_value_get_print_value (var->value, var->format, var); |
0cc7d26f TT |
2587 | return (*var->root->lang->value_of_variable) (var, format); |
2588 | } | |
8756216b DP |
2589 | else |
2590 | return NULL; | |
8b93c638 JM |
2591 | } |
2592 | ||
99ad9427 YQ |
2593 | void |
2594 | varobj_formatted_print_options (struct value_print_options *opts, | |
2595 | enum varobj_display_formats format) | |
2596 | { | |
2597 | get_formatted_print_options (opts, format_code[(int) format]); | |
2598 | opts->deref_ref = 0; | |
2599 | opts->raw = 1; | |
2600 | } | |
2601 | ||
2602 | char * | |
2603 | varobj_value_get_print_value (struct value *value, | |
2604 | enum varobj_display_formats format, | |
2605 | struct varobj *var) | |
85265413 | 2606 | { |
57e66780 | 2607 | struct ui_file *stb; |
621c8364 | 2608 | struct cleanup *old_chain; |
ac91cd70 | 2609 | char *thevalue = NULL; |
79a45b7d | 2610 | struct value_print_options opts; |
be759fcf PM |
2611 | struct type *type = NULL; |
2612 | long len = 0; | |
2613 | char *encoding = NULL; | |
2614 | struct gdbarch *gdbarch = NULL; | |
3a182a69 JK |
2615 | /* Initialize it just to avoid a GCC false warning. */ |
2616 | CORE_ADDR str_addr = 0; | |
09ca9e2e | 2617 | int string_print = 0; |
57e66780 DJ |
2618 | |
2619 | if (value == NULL) | |
2620 | return NULL; | |
2621 | ||
621c8364 TT |
2622 | stb = mem_fileopen (); |
2623 | old_chain = make_cleanup_ui_file_delete (stb); | |
2624 | ||
be759fcf | 2625 | gdbarch = get_type_arch (value_type (value)); |
b6313243 | 2626 | #if HAVE_PYTHON |
0646da15 TT |
2627 | if (gdb_python_initialized) |
2628 | { | |
bb5ce47a | 2629 | PyObject *value_formatter = var->dynamic->pretty_printer; |
d452c4bc | 2630 | |
0646da15 | 2631 | varobj_ensure_python_env (var); |
09ca9e2e | 2632 | |
0646da15 TT |
2633 | if (value_formatter) |
2634 | { | |
2635 | /* First check to see if we have any children at all. If so, | |
2636 | we simply return {...}. */ | |
2637 | if (dynamic_varobj_has_child_method (var)) | |
2638 | { | |
2639 | do_cleanups (old_chain); | |
2640 | return xstrdup ("{...}"); | |
2641 | } | |
b6313243 | 2642 | |
0646da15 TT |
2643 | if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst)) |
2644 | { | |
2645 | struct value *replacement; | |
2646 | PyObject *output = NULL; | |
2647 | ||
2648 | output = apply_varobj_pretty_printer (value_formatter, | |
2649 | &replacement, | |
2650 | stb); | |
2651 | ||
2652 | /* If we have string like output ... */ | |
2653 | if (output) | |
2654 | { | |
2655 | make_cleanup_py_decref (output); | |
2656 | ||
2657 | /* If this is a lazy string, extract it. For lazy | |
2658 | strings we always print as a string, so set | |
2659 | string_print. */ | |
2660 | if (gdbpy_is_lazy_string (output)) | |
2661 | { | |
2662 | gdbpy_extract_lazy_string (output, &str_addr, &type, | |
2663 | &len, &encoding); | |
2664 | make_cleanup (free_current_contents, &encoding); | |
2665 | string_print = 1; | |
2666 | } | |
2667 | else | |
2668 | { | |
2669 | /* If it is a regular (non-lazy) string, extract | |
2670 | it and copy the contents into THEVALUE. If the | |
2671 | hint says to print it as a string, set | |
2672 | string_print. Otherwise just return the extracted | |
2673 | string as a value. */ | |
2674 | ||
2675 | char *s = python_string_to_target_string (output); | |
2676 | ||
2677 | if (s) | |
2678 | { | |
2679 | char *hint; | |
2680 | ||
2681 | hint = gdbpy_get_display_hint (value_formatter); | |
2682 | if (hint) | |
2683 | { | |
2684 | if (!strcmp (hint, "string")) | |
2685 | string_print = 1; | |
2686 | xfree (hint); | |
2687 | } | |
2688 | ||
2689 | len = strlen (s); | |
2690 | thevalue = xmemdup (s, len + 1, len + 1); | |
2691 | type = builtin_type (gdbarch)->builtin_char; | |
2692 | xfree (s); | |
2693 | ||
2694 | if (!string_print) | |
2695 | { | |
2696 | do_cleanups (old_chain); | |
2697 | return thevalue; | |
2698 | } | |
2699 | ||
2700 | make_cleanup (xfree, thevalue); | |
2701 | } | |
2702 | else | |
2703 | gdbpy_print_stack (); | |
2704 | } | |
2705 | } | |
2706 | /* If the printer returned a replacement value, set VALUE | |
2707 | to REPLACEMENT. If there is not a replacement value, | |
2708 | just use the value passed to this function. */ | |
2709 | if (replacement) | |
2710 | value = replacement; | |
2711 | } | |
2712 | } | |
2713 | } | |
b6313243 TT |
2714 | #endif |
2715 | ||
99ad9427 | 2716 | varobj_formatted_print_options (&opts, format); |
00bd41d6 PM |
2717 | |
2718 | /* If the THEVALUE has contents, it is a regular string. */ | |
b6313243 | 2719 | if (thevalue) |
ac91cd70 | 2720 | LA_PRINT_STRING (stb, type, (gdb_byte *) thevalue, len, encoding, 0, &opts); |
09ca9e2e | 2721 | else if (string_print) |
00bd41d6 PM |
2722 | /* Otherwise, if string_print is set, and it is not a regular |
2723 | string, it is a lazy string. */ | |
09ca9e2e | 2724 | val_print_string (type, encoding, str_addr, len, stb, &opts); |
b6313243 | 2725 | else |
00bd41d6 | 2726 | /* All other cases. */ |
b6313243 | 2727 | common_val_print (value, stb, 0, &opts, current_language); |
00bd41d6 | 2728 | |
759ef836 | 2729 | thevalue = ui_file_xstrdup (stb, NULL); |
57e66780 | 2730 | |
85265413 NR |
2731 | do_cleanups (old_chain); |
2732 | return thevalue; | |
2733 | } | |
2734 | ||
340a7723 NR |
2735 | int |
2736 | varobj_editable_p (struct varobj *var) | |
2737 | { | |
2738 | struct type *type; | |
340a7723 NR |
2739 | |
2740 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
2741 | return 0; | |
2742 | ||
99ad9427 | 2743 | type = varobj_get_value_type (var); |
340a7723 NR |
2744 | |
2745 | switch (TYPE_CODE (type)) | |
2746 | { | |
2747 | case TYPE_CODE_STRUCT: | |
2748 | case TYPE_CODE_UNION: | |
2749 | case TYPE_CODE_ARRAY: | |
2750 | case TYPE_CODE_FUNC: | |
2751 | case TYPE_CODE_METHOD: | |
2752 | return 0; | |
2753 | break; | |
2754 | ||
2755 | default: | |
2756 | return 1; | |
2757 | break; | |
2758 | } | |
2759 | } | |
2760 | ||
d32cafc7 | 2761 | /* Call VAR's value_is_changeable_p language-specific callback. */ |
acd65feb | 2762 | |
99ad9427 | 2763 | int |
b2c2bd75 | 2764 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 | 2765 | { |
d32cafc7 | 2766 | return var->root->lang->value_is_changeable_p (var); |
8b93c638 JM |
2767 | } |
2768 | ||
5a413362 VP |
2769 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
2770 | selected frame, and not bound to thread/frame. Such variable objects | |
2771 | are created using '@' as frame specifier to -var-create. */ | |
2772 | int | |
2773 | varobj_floating_p (struct varobj *var) | |
2774 | { | |
2775 | return var->root->floating; | |
2776 | } | |
2777 | ||
d32cafc7 JB |
2778 | /* Implement the "value_is_changeable_p" varobj callback for most |
2779 | languages. */ | |
2780 | ||
99ad9427 YQ |
2781 | int |
2782 | varobj_default_value_is_changeable_p (struct varobj *var) | |
d32cafc7 JB |
2783 | { |
2784 | int r; | |
2785 | struct type *type; | |
2786 | ||
2787 | if (CPLUS_FAKE_CHILD (var)) | |
2788 | return 0; | |
2789 | ||
99ad9427 | 2790 | type = varobj_get_value_type (var); |
d32cafc7 JB |
2791 | |
2792 | switch (TYPE_CODE (type)) | |
2793 | { | |
2794 | case TYPE_CODE_STRUCT: | |
2795 | case TYPE_CODE_UNION: | |
2796 | case TYPE_CODE_ARRAY: | |
2797 | r = 0; | |
2798 | break; | |
2799 | ||
2800 | default: | |
2801 | r = 1; | |
2802 | } | |
2803 | ||
2804 | return r; | |
2805 | } | |
2806 | ||
54333c3b JK |
2807 | /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them |
2808 | with an arbitrary caller supplied DATA pointer. */ | |
2809 | ||
2810 | void | |
2811 | all_root_varobjs (void (*func) (struct varobj *var, void *data), void *data) | |
2812 | { | |
2813 | struct varobj_root *var_root, *var_root_next; | |
2814 | ||
2815 | /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */ | |
2816 | ||
2817 | for (var_root = rootlist; var_root != NULL; var_root = var_root_next) | |
2818 | { | |
2819 | var_root_next = var_root->next; | |
2820 | ||
2821 | (*func) (var_root->rootvar, data); | |
2822 | } | |
2823 | } | |
8b93c638 JM |
2824 | \f |
2825 | extern void _initialize_varobj (void); | |
2826 | void | |
2827 | _initialize_varobj (void) | |
2828 | { | |
2829 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2830 | ||
2831 | varobj_table = xmalloc (sizeof_table); | |
2832 | memset (varobj_table, 0, sizeof_table); | |
2833 | ||
ccce17b0 YQ |
2834 | add_setshow_zuinteger_cmd ("debugvarobj", class_maintenance, |
2835 | &varobjdebug, | |
2836 | _("Set varobj debugging."), | |
2837 | _("Show varobj debugging."), | |
2838 | _("When non-zero, varobj debugging is enabled."), | |
2839 | NULL, show_varobjdebug, | |
2840 | &setlist, &showlist); | |
8b93c638 | 2841 | } |
8756216b | 2842 | |
54333c3b | 2843 | /* Invalidate varobj VAR if it is tied to locals and re-create it if it is |
4e969b4f AB |
2844 | defined on globals. It is a helper for varobj_invalidate. |
2845 | ||
2846 | This function is called after changing the symbol file, in this case the | |
2847 | pointers to "struct type" stored by the varobj are no longer valid. All | |
2848 | varobj must be either re-evaluated, or marked as invalid here. */ | |
2dbd25e5 | 2849 | |
54333c3b JK |
2850 | static void |
2851 | varobj_invalidate_iter (struct varobj *var, void *unused) | |
8756216b | 2852 | { |
4e969b4f AB |
2853 | /* global and floating var must be re-evaluated. */ |
2854 | if (var->root->floating || var->root->valid_block == NULL) | |
2dbd25e5 | 2855 | { |
54333c3b | 2856 | struct varobj *tmp_var; |
2dbd25e5 | 2857 | |
54333c3b JK |
2858 | /* Try to create a varobj with same expression. If we succeed |
2859 | replace the old varobj, otherwise invalidate it. */ | |
2860 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
2861 | USE_CURRENT_FRAME); | |
2862 | if (tmp_var != NULL) | |
2863 | { | |
2864 | tmp_var->obj_name = xstrdup (var->obj_name); | |
2865 | varobj_delete (var, NULL, 0); | |
2866 | install_variable (tmp_var); | |
2dbd25e5 | 2867 | } |
54333c3b JK |
2868 | else |
2869 | var->root->is_valid = 0; | |
2dbd25e5 | 2870 | } |
54333c3b JK |
2871 | else /* locals must be invalidated. */ |
2872 | var->root->is_valid = 0; | |
2873 | } | |
2874 | ||
2875 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2876 | are defined on globals. | |
2877 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2878 | ||
2879 | void | |
2880 | varobj_invalidate (void) | |
2881 | { | |
2882 | all_root_varobjs (varobj_invalidate_iter, NULL); | |
8756216b | 2883 | } |