Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
0fb0cc75 JB |
3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
4 | 2009 Free Software Foundation, Inc. | |
8b93c638 JM |
5 | |
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
8b93c638 JM |
9 | (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8b93c638 JM |
18 | |
19 | #include "defs.h" | |
a6c442d8 | 20 | #include "exceptions.h" |
8b93c638 JM |
21 | #include "value.h" |
22 | #include "expression.h" | |
23 | #include "frame.h" | |
8b93c638 JM |
24 | #include "language.h" |
25 | #include "wrapper.h" | |
26 | #include "gdbcmd.h" | |
d2353924 | 27 | #include "block.h" |
79a45b7d | 28 | #include "valprint.h" |
a6c442d8 MK |
29 | |
30 | #include "gdb_assert.h" | |
b66d6d2e | 31 | #include "gdb_string.h" |
8b93c638 JM |
32 | |
33 | #include "varobj.h" | |
28335dcc | 34 | #include "vec.h" |
6208b47d VP |
35 | #include "gdbthread.h" |
36 | #include "inferior.h" | |
8b93c638 JM |
37 | |
38 | /* Non-zero if we want to see trace of varobj level stuff. */ | |
39 | ||
40 | int varobjdebug = 0; | |
920d2a44 AC |
41 | static void |
42 | show_varobjdebug (struct ui_file *file, int from_tty, | |
43 | struct cmd_list_element *c, const char *value) | |
44 | { | |
45 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
46 | } | |
8b93c638 JM |
47 | |
48 | /* String representations of gdb's format codes */ | |
49 | char *varobj_format_string[] = | |
72330bd6 | 50 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
51 | |
52 | /* String representations of gdb's known languages */ | |
72330bd6 | 53 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
54 | |
55 | /* Data structures */ | |
56 | ||
57 | /* Every root variable has one of these structures saved in its | |
58 | varobj. Members which must be free'd are noted. */ | |
59 | struct varobj_root | |
72330bd6 | 60 | { |
8b93c638 | 61 | |
72330bd6 AC |
62 | /* Alloc'd expression for this parent. */ |
63 | struct expression *exp; | |
8b93c638 | 64 | |
72330bd6 AC |
65 | /* Block for which this expression is valid */ |
66 | struct block *valid_block; | |
8b93c638 | 67 | |
44a67aa7 VP |
68 | /* The frame for this expression. This field is set iff valid_block is |
69 | not NULL. */ | |
e64d9b3d | 70 | struct frame_id frame; |
8b93c638 | 71 | |
c5b48eac VP |
72 | /* The thread ID that this varobj_root belong to. This field |
73 | is only valid if valid_block is not NULL. | |
74 | When not 0, indicates which thread 'frame' belongs to. | |
75 | When 0, indicates that the thread list was empty when the varobj_root | |
76 | was created. */ | |
77 | int thread_id; | |
78 | ||
a5defcdc VP |
79 | /* If 1, the -var-update always recomputes the value in the |
80 | current thread and frame. Otherwise, variable object is | |
81 | always updated in the specific scope/thread/frame */ | |
82 | int floating; | |
73a93a32 | 83 | |
8756216b DP |
84 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
85 | to symbols that do not exist anymore. */ | |
86 | int is_valid; | |
87 | ||
72330bd6 AC |
88 | /* Language info for this variable and its children */ |
89 | struct language_specific *lang; | |
8b93c638 | 90 | |
72330bd6 AC |
91 | /* The varobj for this root node. */ |
92 | struct varobj *rootvar; | |
8b93c638 | 93 | |
72330bd6 AC |
94 | /* Next root variable */ |
95 | struct varobj_root *next; | |
96 | }; | |
8b93c638 JM |
97 | |
98 | /* Every variable in the system has a structure of this type defined | |
99 | for it. This structure holds all information necessary to manipulate | |
100 | a particular object variable. Members which must be freed are noted. */ | |
101 | struct varobj | |
72330bd6 | 102 | { |
8b93c638 | 103 | |
72330bd6 AC |
104 | /* Alloc'd name of the variable for this object.. If this variable is a |
105 | child, then this name will be the child's source name. | |
106 | (bar, not foo.bar) */ | |
107 | /* NOTE: This is the "expression" */ | |
108 | char *name; | |
8b93c638 | 109 | |
02142340 VP |
110 | /* Alloc'd expression for this child. Can be used to create a |
111 | root variable corresponding to this child. */ | |
112 | char *path_expr; | |
113 | ||
72330bd6 AC |
114 | /* The alloc'd name for this variable's object. This is here for |
115 | convenience when constructing this object's children. */ | |
116 | char *obj_name; | |
8b93c638 | 117 | |
72330bd6 AC |
118 | /* Index of this variable in its parent or -1 */ |
119 | int index; | |
8b93c638 | 120 | |
202ddcaa VP |
121 | /* The type of this variable. This can be NULL |
122 | for artifial variable objects -- currently, the "accessibility" | |
123 | variable objects in C++. */ | |
72330bd6 | 124 | struct type *type; |
8b93c638 | 125 | |
b20d8971 VP |
126 | /* The value of this expression or subexpression. A NULL value |
127 | indicates there was an error getting this value. | |
b2c2bd75 VP |
128 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
129 | the value is either NULL, or not lazy. */ | |
30b28db1 | 130 | struct value *value; |
8b93c638 | 131 | |
72330bd6 AC |
132 | /* The number of (immediate) children this variable has */ |
133 | int num_children; | |
8b93c638 | 134 | |
72330bd6 AC |
135 | /* If this object is a child, this points to its immediate parent. */ |
136 | struct varobj *parent; | |
8b93c638 | 137 | |
28335dcc VP |
138 | /* Children of this object. */ |
139 | VEC (varobj_p) *children; | |
8b93c638 | 140 | |
72330bd6 AC |
141 | /* Description of the root variable. Points to root variable for children. */ |
142 | struct varobj_root *root; | |
8b93c638 | 143 | |
72330bd6 AC |
144 | /* The format of the output for this object */ |
145 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
146 | |
147 | /* Was this variable updated via a varobj_set_value operation */ | |
148 | int updated; | |
85265413 NR |
149 | |
150 | /* Last print value. */ | |
151 | char *print_value; | |
25d5ea92 VP |
152 | |
153 | /* Is this variable frozen. Frozen variables are never implicitly | |
154 | updated by -var-update * | |
155 | or -var-update <direct-or-indirect-parent>. */ | |
156 | int frozen; | |
157 | ||
158 | /* Is the value of this variable intentionally not fetched? It is | |
159 | not fetched if either the variable is frozen, or any parents is | |
160 | frozen. */ | |
161 | int not_fetched; | |
72330bd6 | 162 | }; |
8b93c638 | 163 | |
8b93c638 | 164 | struct cpstack |
72330bd6 AC |
165 | { |
166 | char *name; | |
167 | struct cpstack *next; | |
168 | }; | |
8b93c638 JM |
169 | |
170 | /* A list of varobjs */ | |
171 | ||
172 | struct vlist | |
72330bd6 AC |
173 | { |
174 | struct varobj *var; | |
175 | struct vlist *next; | |
176 | }; | |
8b93c638 JM |
177 | |
178 | /* Private function prototypes */ | |
179 | ||
180 | /* Helper functions for the above subcommands. */ | |
181 | ||
a14ed312 | 182 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 183 | |
a14ed312 KB |
184 | static void delete_variable_1 (struct cpstack **, int *, |
185 | struct varobj *, int, int); | |
8b93c638 | 186 | |
a14ed312 | 187 | static int install_variable (struct varobj *); |
8b93c638 | 188 | |
a14ed312 | 189 | static void uninstall_variable (struct varobj *); |
8b93c638 | 190 | |
a14ed312 | 191 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 192 | |
8b93c638 JM |
193 | /* Utility routines */ |
194 | ||
a14ed312 | 195 | static struct varobj *new_variable (void); |
8b93c638 | 196 | |
a14ed312 | 197 | static struct varobj *new_root_variable (void); |
8b93c638 | 198 | |
a14ed312 | 199 | static void free_variable (struct varobj *var); |
8b93c638 | 200 | |
74b7792f AC |
201 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
202 | ||
a14ed312 | 203 | static struct type *get_type (struct varobj *var); |
8b93c638 | 204 | |
6e2a9270 VP |
205 | static struct type *get_value_type (struct varobj *var); |
206 | ||
a14ed312 | 207 | static struct type *get_target_type (struct type *); |
8b93c638 | 208 | |
a14ed312 | 209 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 210 | |
a14ed312 | 211 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 212 | |
a14ed312 | 213 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 214 | |
acd65feb VP |
215 | static int install_new_value (struct varobj *var, struct value *value, |
216 | int initial); | |
217 | ||
8b93c638 JM |
218 | /* Language-specific routines. */ |
219 | ||
a14ed312 | 220 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 221 | |
a14ed312 | 222 | static int number_of_children (struct varobj *); |
8b93c638 | 223 | |
a14ed312 | 224 | static char *name_of_variable (struct varobj *); |
8b93c638 | 225 | |
a14ed312 | 226 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 227 | |
30b28db1 | 228 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 229 | |
30b28db1 | 230 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 231 | |
de051565 MK |
232 | static char *my_value_of_variable (struct varobj *var, |
233 | enum varobj_display_formats format); | |
8b93c638 | 234 | |
85265413 NR |
235 | static char *value_get_print_value (struct value *value, |
236 | enum varobj_display_formats format); | |
237 | ||
b2c2bd75 VP |
238 | static int varobj_value_is_changeable_p (struct varobj *var); |
239 | ||
240 | static int is_root_p (struct varobj *var); | |
8b93c638 JM |
241 | |
242 | /* C implementation */ | |
243 | ||
a14ed312 | 244 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 245 | |
a14ed312 | 246 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 247 | |
a14ed312 | 248 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 249 | |
02142340 VP |
250 | static char *c_path_expr_of_child (struct varobj *child); |
251 | ||
30b28db1 | 252 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 253 | |
30b28db1 | 254 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 255 | |
a14ed312 | 256 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 257 | |
de051565 MK |
258 | static char *c_value_of_variable (struct varobj *var, |
259 | enum varobj_display_formats format); | |
8b93c638 JM |
260 | |
261 | /* C++ implementation */ | |
262 | ||
a14ed312 | 263 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 264 | |
a14ed312 | 265 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 266 | |
a14ed312 | 267 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 268 | |
a14ed312 | 269 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 270 | |
02142340 VP |
271 | static char *cplus_path_expr_of_child (struct varobj *child); |
272 | ||
30b28db1 | 273 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 274 | |
30b28db1 | 275 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 276 | |
a14ed312 | 277 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 278 | |
de051565 MK |
279 | static char *cplus_value_of_variable (struct varobj *var, |
280 | enum varobj_display_formats format); | |
8b93c638 JM |
281 | |
282 | /* Java implementation */ | |
283 | ||
a14ed312 | 284 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 285 | |
a14ed312 | 286 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 287 | |
a14ed312 | 288 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 289 | |
02142340 VP |
290 | static char *java_path_expr_of_child (struct varobj *child); |
291 | ||
30b28db1 | 292 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 293 | |
30b28db1 | 294 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 295 | |
a14ed312 | 296 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 297 | |
de051565 MK |
298 | static char *java_value_of_variable (struct varobj *var, |
299 | enum varobj_display_formats format); | |
8b93c638 JM |
300 | |
301 | /* The language specific vector */ | |
302 | ||
303 | struct language_specific | |
72330bd6 | 304 | { |
8b93c638 | 305 | |
72330bd6 AC |
306 | /* The language of this variable */ |
307 | enum varobj_languages language; | |
8b93c638 | 308 | |
72330bd6 AC |
309 | /* The number of children of PARENT. */ |
310 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 311 | |
72330bd6 AC |
312 | /* The name (expression) of a root varobj. */ |
313 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 314 | |
72330bd6 AC |
315 | /* The name of the INDEX'th child of PARENT. */ |
316 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 317 | |
02142340 VP |
318 | /* Returns the rooted expression of CHILD, which is a variable |
319 | obtain that has some parent. */ | |
320 | char *(*path_expr_of_child) (struct varobj * child); | |
321 | ||
30b28db1 AC |
322 | /* The ``struct value *'' of the root variable ROOT. */ |
323 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 324 | |
30b28db1 AC |
325 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
326 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 327 | |
72330bd6 AC |
328 | /* The type of the INDEX'th child of PARENT. */ |
329 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 330 | |
72330bd6 | 331 | /* The current value of VAR. */ |
de051565 MK |
332 | char *(*value_of_variable) (struct varobj * var, |
333 | enum varobj_display_formats format); | |
72330bd6 | 334 | }; |
8b93c638 JM |
335 | |
336 | /* Array of known source language routines. */ | |
d5d6fca5 | 337 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
338 | /* Unknown (try treating as C */ |
339 | { | |
72330bd6 AC |
340 | vlang_unknown, |
341 | c_number_of_children, | |
342 | c_name_of_variable, | |
343 | c_name_of_child, | |
02142340 | 344 | c_path_expr_of_child, |
72330bd6 AC |
345 | c_value_of_root, |
346 | c_value_of_child, | |
347 | c_type_of_child, | |
72330bd6 | 348 | c_value_of_variable} |
8b93c638 JM |
349 | , |
350 | /* C */ | |
351 | { | |
72330bd6 AC |
352 | vlang_c, |
353 | c_number_of_children, | |
354 | c_name_of_variable, | |
355 | c_name_of_child, | |
02142340 | 356 | c_path_expr_of_child, |
72330bd6 AC |
357 | c_value_of_root, |
358 | c_value_of_child, | |
359 | c_type_of_child, | |
72330bd6 | 360 | c_value_of_variable} |
8b93c638 JM |
361 | , |
362 | /* C++ */ | |
363 | { | |
72330bd6 AC |
364 | vlang_cplus, |
365 | cplus_number_of_children, | |
366 | cplus_name_of_variable, | |
367 | cplus_name_of_child, | |
02142340 | 368 | cplus_path_expr_of_child, |
72330bd6 AC |
369 | cplus_value_of_root, |
370 | cplus_value_of_child, | |
371 | cplus_type_of_child, | |
72330bd6 | 372 | cplus_value_of_variable} |
8b93c638 JM |
373 | , |
374 | /* Java */ | |
375 | { | |
72330bd6 AC |
376 | vlang_java, |
377 | java_number_of_children, | |
378 | java_name_of_variable, | |
379 | java_name_of_child, | |
02142340 | 380 | java_path_expr_of_child, |
72330bd6 AC |
381 | java_value_of_root, |
382 | java_value_of_child, | |
383 | java_type_of_child, | |
72330bd6 | 384 | java_value_of_variable} |
8b93c638 JM |
385 | }; |
386 | ||
387 | /* A little convenience enum for dealing with C++/Java */ | |
388 | enum vsections | |
72330bd6 AC |
389 | { |
390 | v_public = 0, v_private, v_protected | |
391 | }; | |
8b93c638 JM |
392 | |
393 | /* Private data */ | |
394 | ||
395 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 396 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
397 | |
398 | /* Header of the list of root variable objects */ | |
399 | static struct varobj_root *rootlist; | |
400 | static int rootcount = 0; /* number of root varobjs in the list */ | |
401 | ||
402 | /* Prime number indicating the number of buckets in the hash table */ | |
403 | /* A prime large enough to avoid too many colisions */ | |
404 | #define VAROBJ_TABLE_SIZE 227 | |
405 | ||
406 | /* Pointer to the varobj hash table (built at run time) */ | |
407 | static struct vlist **varobj_table; | |
408 | ||
8b93c638 JM |
409 | /* Is the variable X one of our "fake" children? */ |
410 | #define CPLUS_FAKE_CHILD(x) \ | |
411 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
412 | \f | |
413 | ||
414 | /* API Implementation */ | |
b2c2bd75 VP |
415 | static int |
416 | is_root_p (struct varobj *var) | |
417 | { | |
418 | return (var->root->rootvar == var); | |
419 | } | |
8b93c638 JM |
420 | |
421 | /* Creates a varobj (not its children) */ | |
422 | ||
7d8547c9 AC |
423 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
424 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
425 | ||
426 | static struct frame_info * | |
427 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
428 | { | |
429 | struct frame_info *frame = NULL; | |
430 | ||
431 | if (frame_addr == (CORE_ADDR) 0) | |
432 | return NULL; | |
433 | ||
9d49bdc2 PA |
434 | for (frame = get_current_frame (); |
435 | frame != NULL; | |
436 | frame = get_prev_frame (frame)) | |
7d8547c9 | 437 | { |
eb5492fa | 438 | if (get_frame_base_address (frame) == frame_addr) |
7d8547c9 AC |
439 | return frame; |
440 | } | |
9d49bdc2 PA |
441 | |
442 | return NULL; | |
7d8547c9 AC |
443 | } |
444 | ||
8b93c638 JM |
445 | struct varobj * |
446 | varobj_create (char *objname, | |
72330bd6 | 447 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
448 | { |
449 | struct varobj *var; | |
2c67cb8b AC |
450 | struct frame_info *fi; |
451 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
452 | struct block *block; |
453 | struct cleanup *old_chain; | |
454 | ||
455 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
456 | var = new_root_variable (); | |
74b7792f | 457 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
458 | |
459 | if (expression != NULL) | |
460 | { | |
461 | char *p; | |
462 | enum varobj_languages lang; | |
e55dccf0 | 463 | struct value *value = NULL; |
8b93c638 | 464 | |
9d49bdc2 PA |
465 | /* Parse and evaluate the expression, filling in as much of the |
466 | variable's data as possible. */ | |
467 | ||
468 | if (has_stack_frames ()) | |
469 | { | |
470 | /* Allow creator to specify context of variable */ | |
471 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) | |
472 | fi = get_selected_frame (NULL); | |
473 | else | |
474 | /* FIXME: cagney/2002-11-23: This code should be doing a | |
475 | lookup using the frame ID and not just the frame's | |
476 | ``address''. This, of course, means an interface | |
477 | change. However, with out that interface change ISAs, | |
478 | such as the ia64 with its two stacks, won't work. | |
479 | Similar goes for the case where there is a frameless | |
480 | function. */ | |
481 | fi = find_frame_addr_in_frame_chain (frame); | |
482 | } | |
8b93c638 | 483 | else |
9d49bdc2 | 484 | fi = NULL; |
8b93c638 | 485 | |
73a93a32 JI |
486 | /* frame = -2 means always use selected frame */ |
487 | if (type == USE_SELECTED_FRAME) | |
a5defcdc | 488 | var->root->floating = 1; |
73a93a32 | 489 | |
8b93c638 JM |
490 | block = NULL; |
491 | if (fi != NULL) | |
ae767bfb | 492 | block = get_frame_block (fi, 0); |
8b93c638 JM |
493 | |
494 | p = expression; | |
495 | innermost_block = NULL; | |
73a93a32 JI |
496 | /* Wrap the call to parse expression, so we can |
497 | return a sensible error. */ | |
498 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
499 | { | |
500 | return NULL; | |
501 | } | |
8b93c638 JM |
502 | |
503 | /* Don't allow variables to be created for types. */ | |
504 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
505 | { | |
506 | do_cleanups (old_chain); | |
bc8332bb AC |
507 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
508 | " as an expression.\n"); | |
8b93c638 JM |
509 | return NULL; |
510 | } | |
511 | ||
512 | var->format = variable_default_display (var); | |
513 | var->root->valid_block = innermost_block; | |
1b36a34b | 514 | var->name = xstrdup (expression); |
02142340 | 515 | /* For a root var, the name and the expr are the same. */ |
1b36a34b | 516 | var->path_expr = xstrdup (expression); |
8b93c638 JM |
517 | |
518 | /* When the frame is different from the current frame, | |
519 | we must select the appropriate frame before parsing | |
520 | the expression, otherwise the value will not be current. | |
521 | Since select_frame is so benign, just call it for all cases. */ | |
44a67aa7 | 522 | if (innermost_block && fi != NULL) |
8b93c638 | 523 | { |
7a424e99 | 524 | var->root->frame = get_frame_id (fi); |
c5b48eac | 525 | var->root->thread_id = pid_to_thread_id (inferior_ptid); |
206415a3 | 526 | old_fi = get_selected_frame (NULL); |
c5b48eac | 527 | select_frame (fi); |
8b93c638 JM |
528 | } |
529 | ||
340a7723 | 530 | /* We definitely need to catch errors here. |
8b93c638 JM |
531 | If evaluate_expression succeeds we got the value we wanted. |
532 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb | 533 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
e55dccf0 VP |
534 | { |
535 | /* Error getting the value. Try to at least get the | |
536 | right type. */ | |
537 | struct value *type_only_value = evaluate_type (var->root->exp); | |
538 | var->type = value_type (type_only_value); | |
539 | } | |
540 | else | |
541 | var->type = value_type (value); | |
acd65feb | 542 | |
acd65feb | 543 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
544 | |
545 | /* Set language info */ | |
546 | lang = variable_language (var); | |
d5d6fca5 | 547 | var->root->lang = &languages[lang]; |
8b93c638 JM |
548 | |
549 | /* Set ourselves as our root */ | |
550 | var->root->rootvar = var; | |
551 | ||
552 | /* Reset the selected frame */ | |
553 | if (fi != NULL) | |
0f7d239c | 554 | select_frame (old_fi); |
8b93c638 JM |
555 | } |
556 | ||
73a93a32 JI |
557 | /* If the variable object name is null, that means this |
558 | is a temporary variable, so don't install it. */ | |
559 | ||
560 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 | 561 | { |
1b36a34b | 562 | var->obj_name = xstrdup (objname); |
8b93c638 JM |
563 | |
564 | /* If a varobj name is duplicated, the install will fail so | |
565 | we must clenup */ | |
566 | if (!install_variable (var)) | |
567 | { | |
568 | do_cleanups (old_chain); | |
569 | return NULL; | |
570 | } | |
571 | } | |
572 | ||
573 | discard_cleanups (old_chain); | |
574 | return var; | |
575 | } | |
576 | ||
577 | /* Generates an unique name that can be used for a varobj */ | |
578 | ||
579 | char * | |
580 | varobj_gen_name (void) | |
581 | { | |
582 | static int id = 0; | |
e64d9b3d | 583 | char *obj_name; |
8b93c638 JM |
584 | |
585 | /* generate a name for this object */ | |
586 | id++; | |
b435e160 | 587 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 588 | |
e64d9b3d | 589 | return obj_name; |
8b93c638 JM |
590 | } |
591 | ||
61d8f275 JK |
592 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
593 | error if OBJNAME cannot be found. */ | |
8b93c638 JM |
594 | |
595 | struct varobj * | |
596 | varobj_get_handle (char *objname) | |
597 | { | |
598 | struct vlist *cv; | |
599 | const char *chp; | |
600 | unsigned int index = 0; | |
601 | unsigned int i = 1; | |
602 | ||
603 | for (chp = objname; *chp; chp++) | |
604 | { | |
605 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
606 | } | |
607 | ||
608 | cv = *(varobj_table + index); | |
609 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
610 | cv = cv->next; | |
611 | ||
612 | if (cv == NULL) | |
8a3fe4f8 | 613 | error (_("Variable object not found")); |
8b93c638 JM |
614 | |
615 | return cv->var; | |
616 | } | |
617 | ||
618 | /* Given the handle, return the name of the object */ | |
619 | ||
620 | char * | |
621 | varobj_get_objname (struct varobj *var) | |
622 | { | |
623 | return var->obj_name; | |
624 | } | |
625 | ||
626 | /* Given the handle, return the expression represented by the object */ | |
627 | ||
628 | char * | |
629 | varobj_get_expression (struct varobj *var) | |
630 | { | |
631 | return name_of_variable (var); | |
632 | } | |
633 | ||
634 | /* Deletes a varobj and all its children if only_children == 0, | |
635 | otherwise deletes only the children; returns a malloc'ed list of all the | |
636 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
637 | ||
638 | int | |
639 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
640 | { | |
641 | int delcount; | |
642 | int mycount; | |
643 | struct cpstack *result = NULL; | |
644 | char **cp; | |
645 | ||
646 | /* Initialize a stack for temporary results */ | |
647 | cppush (&result, NULL); | |
648 | ||
649 | if (only_children) | |
650 | /* Delete only the variable children */ | |
651 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
652 | else | |
653 | /* Delete the variable and all its children */ | |
654 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
655 | ||
656 | /* We may have been asked to return a list of what has been deleted */ | |
657 | if (dellist != NULL) | |
658 | { | |
659 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
660 | ||
661 | cp = *dellist; | |
662 | mycount = delcount; | |
663 | *cp = cppop (&result); | |
664 | while ((*cp != NULL) && (mycount > 0)) | |
665 | { | |
666 | mycount--; | |
667 | cp++; | |
668 | *cp = cppop (&result); | |
669 | } | |
670 | ||
671 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 672 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 673 | mycount); |
8b93c638 JM |
674 | } |
675 | ||
676 | return delcount; | |
677 | } | |
678 | ||
679 | /* Set/Get variable object display format */ | |
680 | ||
681 | enum varobj_display_formats | |
682 | varobj_set_display_format (struct varobj *var, | |
683 | enum varobj_display_formats format) | |
684 | { | |
685 | switch (format) | |
686 | { | |
687 | case FORMAT_NATURAL: | |
688 | case FORMAT_BINARY: | |
689 | case FORMAT_DECIMAL: | |
690 | case FORMAT_HEXADECIMAL: | |
691 | case FORMAT_OCTAL: | |
692 | var->format = format; | |
693 | break; | |
694 | ||
695 | default: | |
696 | var->format = variable_default_display (var); | |
697 | } | |
698 | ||
ae7d22a6 VP |
699 | if (varobj_value_is_changeable_p (var) |
700 | && var->value && !value_lazy (var->value)) | |
701 | { | |
6c761d9c | 702 | xfree (var->print_value); |
ae7d22a6 VP |
703 | var->print_value = value_get_print_value (var->value, var->format); |
704 | } | |
705 | ||
8b93c638 JM |
706 | return var->format; |
707 | } | |
708 | ||
709 | enum varobj_display_formats | |
710 | varobj_get_display_format (struct varobj *var) | |
711 | { | |
712 | return var->format; | |
713 | } | |
714 | ||
c5b48eac VP |
715 | /* If the variable object is bound to a specific thread, that |
716 | is its evaluation can always be done in context of a frame | |
717 | inside that thread, returns GDB id of the thread -- which | |
718 | is always positive. Otherwise, returns -1. */ | |
719 | int | |
720 | varobj_get_thread_id (struct varobj *var) | |
721 | { | |
722 | if (var->root->valid_block && var->root->thread_id > 0) | |
723 | return var->root->thread_id; | |
724 | else | |
725 | return -1; | |
726 | } | |
727 | ||
25d5ea92 VP |
728 | void |
729 | varobj_set_frozen (struct varobj *var, int frozen) | |
730 | { | |
731 | /* When a variable is unfrozen, we don't fetch its value. | |
732 | The 'not_fetched' flag remains set, so next -var-update | |
733 | won't complain. | |
734 | ||
735 | We don't fetch the value, because for structures the client | |
736 | should do -var-update anyway. It would be bad to have different | |
737 | client-size logic for structure and other types. */ | |
738 | var->frozen = frozen; | |
739 | } | |
740 | ||
741 | int | |
742 | varobj_get_frozen (struct varobj *var) | |
743 | { | |
744 | return var->frozen; | |
745 | } | |
746 | ||
747 | ||
8b93c638 JM |
748 | int |
749 | varobj_get_num_children (struct varobj *var) | |
750 | { | |
751 | if (var->num_children == -1) | |
752 | var->num_children = number_of_children (var); | |
753 | ||
754 | return var->num_children; | |
755 | } | |
756 | ||
757 | /* Creates a list of the immediate children of a variable object; | |
758 | the return code is the number of such children or -1 on error */ | |
759 | ||
d56d46f5 VP |
760 | VEC (varobj_p)* |
761 | varobj_list_children (struct varobj *var) | |
8b93c638 JM |
762 | { |
763 | struct varobj *child; | |
764 | char *name; | |
765 | int i; | |
766 | ||
8b93c638 JM |
767 | if (var->num_children == -1) |
768 | var->num_children = number_of_children (var); | |
769 | ||
74a44383 DJ |
770 | /* If that failed, give up. */ |
771 | if (var->num_children == -1) | |
d56d46f5 | 772 | return var->children; |
74a44383 | 773 | |
28335dcc VP |
774 | /* If we're called when the list of children is not yet initialized, |
775 | allocate enough elements in it. */ | |
776 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
777 | VEC_safe_push (varobj_p, var->children, NULL); | |
778 | ||
8b93c638 JM |
779 | for (i = 0; i < var->num_children; i++) |
780 | { | |
d56d46f5 | 781 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
782 | |
783 | if (existing == NULL) | |
784 | { | |
785 | /* Either it's the first call to varobj_list_children for | |
786 | this variable object, and the child was never created, | |
787 | or it was explicitly deleted by the client. */ | |
788 | name = name_of_child (var, i); | |
789 | existing = create_child (var, i, name); | |
790 | VEC_replace (varobj_p, var->children, i, existing); | |
791 | } | |
8b93c638 JM |
792 | } |
793 | ||
d56d46f5 | 794 | return var->children; |
8b93c638 JM |
795 | } |
796 | ||
797 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
798 | prints on the console */ | |
799 | ||
800 | char * | |
801 | varobj_get_type (struct varobj *var) | |
802 | { | |
30b28db1 | 803 | struct value *val; |
8b93c638 JM |
804 | struct cleanup *old_chain; |
805 | struct ui_file *stb; | |
806 | char *thetype; | |
807 | long length; | |
808 | ||
809 | /* For the "fake" variables, do not return a type. (It's type is | |
8756216b DP |
810 | NULL, too.) |
811 | Do not return a type for invalid variables as well. */ | |
812 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
813 | return NULL; |
814 | ||
815 | stb = mem_fileopen (); | |
816 | old_chain = make_cleanup_ui_file_delete (stb); | |
817 | ||
30b28db1 | 818 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
819 | cast it to our type. We then typeprint this variable. */ |
820 | val = value_zero (var->type, not_lval); | |
df407dfe | 821 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
822 | |
823 | thetype = ui_file_xstrdup (stb, &length); | |
824 | do_cleanups (old_chain); | |
825 | return thetype; | |
826 | } | |
827 | ||
1ecb4ee0 DJ |
828 | /* Obtain the type of an object variable. */ |
829 | ||
830 | struct type * | |
831 | varobj_get_gdb_type (struct varobj *var) | |
832 | { | |
833 | return var->type; | |
834 | } | |
835 | ||
02142340 VP |
836 | /* Return a pointer to the full rooted expression of varobj VAR. |
837 | If it has not been computed yet, compute it. */ | |
838 | char * | |
839 | varobj_get_path_expr (struct varobj *var) | |
840 | { | |
841 | if (var->path_expr != NULL) | |
842 | return var->path_expr; | |
843 | else | |
844 | { | |
845 | /* For root varobjs, we initialize path_expr | |
846 | when creating varobj, so here it should be | |
847 | child varobj. */ | |
848 | gdb_assert (!is_root_p (var)); | |
849 | return (*var->root->lang->path_expr_of_child) (var); | |
850 | } | |
851 | } | |
852 | ||
8b93c638 JM |
853 | enum varobj_languages |
854 | varobj_get_language (struct varobj *var) | |
855 | { | |
856 | return variable_language (var); | |
857 | } | |
858 | ||
859 | int | |
860 | varobj_get_attributes (struct varobj *var) | |
861 | { | |
862 | int attributes = 0; | |
863 | ||
340a7723 | 864 | if (varobj_editable_p (var)) |
8b93c638 JM |
865 | /* FIXME: define masks for attributes */ |
866 | attributes |= 0x00000001; /* Editable */ | |
867 | ||
868 | return attributes; | |
869 | } | |
870 | ||
de051565 MK |
871 | char * |
872 | varobj_get_formatted_value (struct varobj *var, | |
873 | enum varobj_display_formats format) | |
874 | { | |
875 | return my_value_of_variable (var, format); | |
876 | } | |
877 | ||
8b93c638 JM |
878 | char * |
879 | varobj_get_value (struct varobj *var) | |
880 | { | |
de051565 | 881 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
882 | } |
883 | ||
884 | /* Set the value of an object variable (if it is editable) to the | |
885 | value of the given expression */ | |
886 | /* Note: Invokes functions that can call error() */ | |
887 | ||
888 | int | |
889 | varobj_set_value (struct varobj *var, char *expression) | |
890 | { | |
30b28db1 | 891 | struct value *val; |
8b93c638 | 892 | int offset = 0; |
a6c442d8 | 893 | int error = 0; |
8b93c638 JM |
894 | |
895 | /* The argument "expression" contains the variable's new value. | |
896 | We need to first construct a legal expression for this -- ugh! */ | |
897 | /* Does this cover all the bases? */ | |
898 | struct expression *exp; | |
30b28db1 | 899 | struct value *value; |
8b93c638 | 900 | int saved_input_radix = input_radix; |
340a7723 NR |
901 | char *s = expression; |
902 | int i; | |
8b93c638 | 903 | |
340a7723 | 904 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 905 | |
340a7723 NR |
906 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ |
907 | exp = parse_exp_1 (&s, 0, 0); | |
908 | if (!gdb_evaluate_expression (exp, &value)) | |
909 | { | |
910 | /* We cannot proceed without a valid expression. */ | |
911 | xfree (exp); | |
912 | return 0; | |
8b93c638 JM |
913 | } |
914 | ||
340a7723 NR |
915 | /* All types that are editable must also be changeable. */ |
916 | gdb_assert (varobj_value_is_changeable_p (var)); | |
917 | ||
918 | /* The value of a changeable variable object must not be lazy. */ | |
919 | gdb_assert (!value_lazy (var->value)); | |
920 | ||
921 | /* Need to coerce the input. We want to check if the | |
922 | value of the variable object will be different | |
923 | after assignment, and the first thing value_assign | |
924 | does is coerce the input. | |
925 | For example, if we are assigning an array to a pointer variable we | |
926 | should compare the pointer with the the array's address, not with the | |
927 | array's content. */ | |
928 | value = coerce_array (value); | |
929 | ||
930 | /* The new value may be lazy. gdb_value_assign, or | |
931 | rather value_contents, will take care of this. | |
932 | If fetching of the new value will fail, gdb_value_assign | |
933 | with catch the exception. */ | |
934 | if (!gdb_value_assign (var->value, value, &val)) | |
935 | return 0; | |
936 | ||
937 | /* If the value has changed, record it, so that next -var-update can | |
938 | report this change. If a variable had a value of '1', we've set it | |
939 | to '333' and then set again to '1', when -var-update will report this | |
940 | variable as changed -- because the first assignment has set the | |
941 | 'updated' flag. There's no need to optimize that, because return value | |
942 | of -var-update should be considered an approximation. */ | |
943 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
944 | input_radix = saved_input_radix; | |
945 | return 1; | |
8b93c638 JM |
946 | } |
947 | ||
948 | /* Returns a malloc'ed list with all root variable objects */ | |
949 | int | |
950 | varobj_list (struct varobj ***varlist) | |
951 | { | |
952 | struct varobj **cv; | |
953 | struct varobj_root *croot; | |
954 | int mycount = rootcount; | |
955 | ||
956 | /* Alloc (rootcount + 1) entries for the result */ | |
957 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
958 | ||
959 | cv = *varlist; | |
960 | croot = rootlist; | |
961 | while ((croot != NULL) && (mycount > 0)) | |
962 | { | |
963 | *cv = croot->rootvar; | |
964 | mycount--; | |
965 | cv++; | |
966 | croot = croot->next; | |
967 | } | |
968 | /* Mark the end of the list */ | |
969 | *cv = NULL; | |
970 | ||
971 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
972 | warning |
973 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
974 | rootcount, mycount); | |
8b93c638 JM |
975 | |
976 | return rootcount; | |
977 | } | |
978 | ||
acd65feb VP |
979 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
980 | this is the first assignement after the variable object was just | |
981 | created, or changed type. In that case, just assign the value | |
982 | and return 0. | |
ee342b23 VP |
983 | Otherwise, assign the new value, and return 1 if the value is different |
984 | from the current one, 0 otherwise. The comparison is done on textual | |
985 | representation of value. Therefore, some types need not be compared. E.g. | |
986 | for structures the reported value is always "{...}", so no comparison is | |
987 | necessary here. If the old value was NULL and new one is not, or vice versa, | |
988 | we always return 1. | |
b26ed50d VP |
989 | |
990 | The VALUE parameter should not be released -- the function will | |
991 | take care of releasing it when needed. */ | |
acd65feb VP |
992 | static int |
993 | install_new_value (struct varobj *var, struct value *value, int initial) | |
994 | { | |
995 | int changeable; | |
996 | int need_to_fetch; | |
997 | int changed = 0; | |
25d5ea92 | 998 | int intentionally_not_fetched = 0; |
7a4d50bf | 999 | char *print_value = NULL; |
acd65feb | 1000 | |
acd65feb VP |
1001 | /* We need to know the varobj's type to decide if the value should |
1002 | be fetched or not. C++ fake children (public/protected/private) don't have | |
1003 | a type. */ | |
1004 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 1005 | changeable = varobj_value_is_changeable_p (var); |
acd65feb VP |
1006 | need_to_fetch = changeable; |
1007 | ||
b26ed50d VP |
1008 | /* We are not interested in the address of references, and given |
1009 | that in C++ a reference is not rebindable, it cannot | |
1010 | meaningfully change. So, get hold of the real value. */ | |
1011 | if (value) | |
1012 | { | |
1013 | value = coerce_ref (value); | |
1014 | release_value (value); | |
1015 | } | |
1016 | ||
acd65feb VP |
1017 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1018 | /* For unions, we need to fetch the value implicitly because | |
1019 | of implementation of union member fetch. When gdb | |
1020 | creates a value for a field and the value of the enclosing | |
1021 | structure is not lazy, it immediately copies the necessary | |
1022 | bytes from the enclosing values. If the enclosing value is | |
1023 | lazy, the call to value_fetch_lazy on the field will read | |
1024 | the data from memory. For unions, that means we'll read the | |
1025 | same memory more than once, which is not desirable. So | |
1026 | fetch now. */ | |
1027 | need_to_fetch = 1; | |
1028 | ||
1029 | /* The new value might be lazy. If the type is changeable, | |
1030 | that is we'll be comparing values of this type, fetch the | |
1031 | value now. Otherwise, on the next update the old value | |
1032 | will be lazy, which means we've lost that old value. */ | |
1033 | if (need_to_fetch && value && value_lazy (value)) | |
1034 | { | |
25d5ea92 VP |
1035 | struct varobj *parent = var->parent; |
1036 | int frozen = var->frozen; | |
1037 | for (; !frozen && parent; parent = parent->parent) | |
1038 | frozen |= parent->frozen; | |
1039 | ||
1040 | if (frozen && initial) | |
1041 | { | |
1042 | /* For variables that are frozen, or are children of frozen | |
1043 | variables, we don't do fetch on initial assignment. | |
1044 | For non-initial assignemnt we do the fetch, since it means we're | |
1045 | explicitly asked to compare the new value with the old one. */ | |
1046 | intentionally_not_fetched = 1; | |
1047 | } | |
1048 | else if (!gdb_value_fetch_lazy (value)) | |
acd65feb | 1049 | { |
acd65feb VP |
1050 | /* Set the value to NULL, so that for the next -var-update, |
1051 | we don't try to compare the new value with this value, | |
1052 | that we couldn't even read. */ | |
1053 | value = NULL; | |
1054 | } | |
acd65feb VP |
1055 | } |
1056 | ||
7a4d50bf VP |
1057 | /* Below, we'll be comparing string rendering of old and new |
1058 | values. Don't get string rendering if the value is | |
1059 | lazy -- if it is, the code above has decided that the value | |
1060 | should not be fetched. */ | |
1061 | if (value && !value_lazy (value)) | |
1062 | print_value = value_get_print_value (value, var->format); | |
1063 | ||
acd65feb VP |
1064 | /* If the type is changeable, compare the old and the new values. |
1065 | If this is the initial assignment, we don't have any old value | |
1066 | to compare with. */ | |
7a4d50bf | 1067 | if (!initial && changeable) |
acd65feb VP |
1068 | { |
1069 | /* If the value of the varobj was changed by -var-set-value, then the | |
1070 | value in the varobj and in the target is the same. However, that value | |
1071 | is different from the value that the varobj had after the previous | |
57e66780 | 1072 | -var-update. So need to the varobj as changed. */ |
acd65feb | 1073 | if (var->updated) |
57e66780 | 1074 | { |
57e66780 DJ |
1075 | changed = 1; |
1076 | } | |
acd65feb VP |
1077 | else |
1078 | { | |
1079 | /* Try to compare the values. That requires that both | |
1080 | values are non-lazy. */ | |
25d5ea92 VP |
1081 | if (var->not_fetched && value_lazy (var->value)) |
1082 | { | |
1083 | /* This is a frozen varobj and the value was never read. | |
1084 | Presumably, UI shows some "never read" indicator. | |
1085 | Now that we've fetched the real value, we need to report | |
1086 | this varobj as changed so that UI can show the real | |
1087 | value. */ | |
1088 | changed = 1; | |
1089 | } | |
1090 | else if (var->value == NULL && value == NULL) | |
acd65feb VP |
1091 | /* Equal. */ |
1092 | ; | |
1093 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1094 | { |
57e66780 DJ |
1095 | changed = 1; |
1096 | } | |
acd65feb VP |
1097 | else |
1098 | { | |
1099 | gdb_assert (!value_lazy (var->value)); | |
1100 | gdb_assert (!value_lazy (value)); | |
85265413 | 1101 | |
57e66780 | 1102 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1103 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1104 | changed = 1; |
acd65feb VP |
1105 | } |
1106 | } | |
1107 | } | |
85265413 | 1108 | |
ee342b23 VP |
1109 | if (!initial && !changeable) |
1110 | { | |
1111 | /* For values that are not changeable, we don't compare the values. | |
1112 | However, we want to notice if a value was not NULL and now is NULL, | |
1113 | or vise versa, so that we report when top-level varobjs come in scope | |
1114 | and leave the scope. */ | |
1115 | changed = (var->value != NULL) != (value != NULL); | |
1116 | } | |
1117 | ||
acd65feb | 1118 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1119 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1120 | value_free (var->value); |
1121 | var->value = value; | |
7a4d50bf VP |
1122 | if (var->print_value) |
1123 | xfree (var->print_value); | |
1124 | var->print_value = print_value; | |
25d5ea92 VP |
1125 | if (value && value_lazy (value) && intentionally_not_fetched) |
1126 | var->not_fetched = 1; | |
1127 | else | |
1128 | var->not_fetched = 0; | |
acd65feb | 1129 | var->updated = 0; |
85265413 | 1130 | |
b26ed50d | 1131 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1132 | |
1133 | return changed; | |
1134 | } | |
acd65feb | 1135 | |
8b93c638 JM |
1136 | /* Update the values for a variable and its children. This is a |
1137 | two-pronged attack. First, re-parse the value for the root's | |
1138 | expression to see if it's changed. Then go all the way | |
1139 | through its children, reconstructing them and noting if they've | |
1140 | changed. | |
1141 | ||
25d5ea92 VP |
1142 | The EXPLICIT parameter specifies if this call is result |
1143 | of MI request to update this specific variable, or | |
1144 | result of implicit -var-update *. For implicit request, we don't | |
1145 | update frozen variables. | |
705da579 KS |
1146 | |
1147 | NOTE: This function may delete the caller's varobj. If it | |
8756216b DP |
1148 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1149 | to point to the new varobj. */ | |
8b93c638 | 1150 | |
f7f9ae2c | 1151 | VEC(varobj_update_result) *varobj_update (struct varobj **varp, int explicit) |
8b93c638 JM |
1152 | { |
1153 | int changed = 0; | |
25d5ea92 | 1154 | int type_changed = 0; |
8b93c638 JM |
1155 | int i; |
1156 | int vleft; | |
8b93c638 JM |
1157 | struct varobj *v; |
1158 | struct varobj **cv; | |
2c67cb8b | 1159 | struct varobj **templist = NULL; |
30b28db1 | 1160 | struct value *new; |
28335dcc | 1161 | VEC (varobj_p) *stack = NULL; |
f7f9ae2c | 1162 | VEC (varobj_update_result) *result = NULL; |
e64d9b3d | 1163 | struct frame_info *fi; |
8b93c638 | 1164 | |
25d5ea92 VP |
1165 | /* Frozen means frozen -- we don't check for any change in |
1166 | this varobj, including its going out of scope, or | |
1167 | changing type. One use case for frozen varobjs is | |
1168 | retaining previously evaluated expressions, and we don't | |
1169 | want them to be reevaluated at all. */ | |
1170 | if (!explicit && (*varp)->frozen) | |
f7f9ae2c | 1171 | return result; |
8756216b DP |
1172 | |
1173 | if (!(*varp)->root->is_valid) | |
f7f9ae2c VP |
1174 | { |
1175 | varobj_update_result r = {*varp}; | |
1176 | r.status = VAROBJ_INVALID; | |
1177 | VEC_safe_push (varobj_update_result, result, &r); | |
1178 | return result; | |
1179 | } | |
8b93c638 | 1180 | |
25d5ea92 | 1181 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1182 | { |
f7f9ae2c VP |
1183 | varobj_update_result r = {*varp}; |
1184 | r.status = VAROBJ_IN_SCOPE; | |
1185 | ||
25d5ea92 VP |
1186 | /* Update the root variable. value_of_root can return NULL |
1187 | if the variable is no longer around, i.e. we stepped out of | |
1188 | the frame in which a local existed. We are letting the | |
1189 | value_of_root variable dispose of the varobj if the type | |
1190 | has changed. */ | |
25d5ea92 | 1191 | new = value_of_root (varp, &type_changed); |
f7f9ae2c VP |
1192 | r.varobj = *varp; |
1193 | ||
1194 | r.type_changed = type_changed; | |
ea56f9c2 | 1195 | if (install_new_value ((*varp), new, type_changed)) |
f7f9ae2c | 1196 | r.changed = 1; |
ea56f9c2 | 1197 | |
25d5ea92 | 1198 | if (new == NULL) |
f7f9ae2c VP |
1199 | r.status = VAROBJ_NOT_IN_SCOPE; |
1200 | ||
1201 | if (r.type_changed || r.changed) | |
1202 | VEC_safe_push (varobj_update_result, result, &r); | |
1203 | ||
1204 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
1205 | return result; | |
b20d8971 VP |
1206 | } |
1207 | ||
28335dcc | 1208 | VEC_safe_push (varobj_p, stack, *varp); |
8b93c638 | 1209 | |
8756216b | 1210 | /* Walk through the children, reconstructing them all. */ |
28335dcc | 1211 | while (!VEC_empty (varobj_p, stack)) |
8b93c638 | 1212 | { |
28335dcc VP |
1213 | v = VEC_pop (varobj_p, stack); |
1214 | ||
1215 | /* Push any children. Use reverse order so that the first | |
1216 | child is popped from the work stack first, and so | |
1217 | will be added to result first. This does not | |
1218 | affect correctness, just "nicer". */ | |
1219 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1220 | { |
28335dcc VP |
1221 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1222 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
25d5ea92 | 1223 | if (c != NULL && !c->frozen) |
28335dcc | 1224 | VEC_safe_push (varobj_p, stack, c); |
8b93c638 JM |
1225 | } |
1226 | ||
28335dcc VP |
1227 | /* Update this variable, unless it's a root, which is already |
1228 | updated. */ | |
25d5ea92 | 1229 | if (v->root->rootvar != v) |
28335dcc VP |
1230 | { |
1231 | new = value_of_child (v->parent, v->index); | |
1232 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1233 | { | |
1234 | /* Note that it's changed */ | |
f7f9ae2c VP |
1235 | varobj_update_result r = {v}; |
1236 | r.changed = 1; | |
1237 | VEC_safe_push (varobj_update_result, result, &r); | |
28335dcc VP |
1238 | v->updated = 0; |
1239 | } | |
8b93c638 | 1240 | } |
8b93c638 JM |
1241 | } |
1242 | ||
93b979d6 | 1243 | VEC_free (varobj_p, stack); |
f7f9ae2c | 1244 | return result; |
8b93c638 JM |
1245 | } |
1246 | \f | |
1247 | ||
1248 | /* Helper functions */ | |
1249 | ||
1250 | /* | |
1251 | * Variable object construction/destruction | |
1252 | */ | |
1253 | ||
1254 | static int | |
fba45db2 KB |
1255 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1256 | int only_children_p) | |
8b93c638 JM |
1257 | { |
1258 | int delcount = 0; | |
1259 | ||
1260 | delete_variable_1 (resultp, &delcount, var, | |
1261 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1262 | ||
1263 | return delcount; | |
1264 | } | |
1265 | ||
1266 | /* Delete the variable object VAR and its children */ | |
1267 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1268 | and the parent is not removed we dump core. It must be always | |
1269 | initially called with remove_from_parent_p set */ | |
1270 | static void | |
72330bd6 AC |
1271 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1272 | struct varobj *var, int only_children_p, | |
1273 | int remove_from_parent_p) | |
8b93c638 | 1274 | { |
28335dcc | 1275 | int i; |
8b93c638 JM |
1276 | |
1277 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1278 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1279 | { | |
1280 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
214270ab VP |
1281 | if (!child) |
1282 | continue; | |
8b93c638 | 1283 | if (!remove_from_parent_p) |
28335dcc VP |
1284 | child->parent = NULL; |
1285 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1286 | } |
28335dcc | 1287 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1288 | |
1289 | /* if we were called to delete only the children we are done here */ | |
1290 | if (only_children_p) | |
1291 | return; | |
1292 | ||
1293 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1294 | /* If the name is null, this is a temporary variable, that has not |
1295 | yet been installed, don't report it, it belongs to the caller... */ | |
1296 | if (var->obj_name != NULL) | |
8b93c638 | 1297 | { |
5b616ba1 | 1298 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1299 | *delcountp = *delcountp + 1; |
1300 | } | |
1301 | ||
1302 | /* If this variable has a parent, remove it from its parent's list */ | |
1303 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1304 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1305 | expensive list search to find the element to remove when we are | |
1306 | discarding the list afterwards */ | |
72330bd6 | 1307 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1308 | { |
28335dcc | 1309 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1310 | } |
72330bd6 | 1311 | |
73a93a32 JI |
1312 | if (var->obj_name != NULL) |
1313 | uninstall_variable (var); | |
8b93c638 JM |
1314 | |
1315 | /* Free memory associated with this variable */ | |
1316 | free_variable (var); | |
1317 | } | |
1318 | ||
1319 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1320 | static int | |
fba45db2 | 1321 | install_variable (struct varobj *var) |
8b93c638 JM |
1322 | { |
1323 | struct vlist *cv; | |
1324 | struct vlist *newvl; | |
1325 | const char *chp; | |
1326 | unsigned int index = 0; | |
1327 | unsigned int i = 1; | |
1328 | ||
1329 | for (chp = var->obj_name; *chp; chp++) | |
1330 | { | |
1331 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1332 | } | |
1333 | ||
1334 | cv = *(varobj_table + index); | |
1335 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1336 | cv = cv->next; | |
1337 | ||
1338 | if (cv != NULL) | |
8a3fe4f8 | 1339 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1340 | |
1341 | /* Add varobj to hash table */ | |
1342 | newvl = xmalloc (sizeof (struct vlist)); | |
1343 | newvl->next = *(varobj_table + index); | |
1344 | newvl->var = var; | |
1345 | *(varobj_table + index) = newvl; | |
1346 | ||
1347 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1348 | if (is_root_p (var)) |
8b93c638 JM |
1349 | { |
1350 | /* Add to list of root variables */ | |
1351 | if (rootlist == NULL) | |
1352 | var->root->next = NULL; | |
1353 | else | |
1354 | var->root->next = rootlist; | |
1355 | rootlist = var->root; | |
1356 | rootcount++; | |
1357 | } | |
1358 | ||
1359 | return 1; /* OK */ | |
1360 | } | |
1361 | ||
1362 | /* Unistall the object VAR. */ | |
1363 | static void | |
fba45db2 | 1364 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1365 | { |
1366 | struct vlist *cv; | |
1367 | struct vlist *prev; | |
1368 | struct varobj_root *cr; | |
1369 | struct varobj_root *prer; | |
1370 | const char *chp; | |
1371 | unsigned int index = 0; | |
1372 | unsigned int i = 1; | |
1373 | ||
1374 | /* Remove varobj from hash table */ | |
1375 | for (chp = var->obj_name; *chp; chp++) | |
1376 | { | |
1377 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1378 | } | |
1379 | ||
1380 | cv = *(varobj_table + index); | |
1381 | prev = NULL; | |
1382 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1383 | { | |
1384 | prev = cv; | |
1385 | cv = cv->next; | |
1386 | } | |
1387 | ||
1388 | if (varobjdebug) | |
1389 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1390 | ||
1391 | if (cv == NULL) | |
1392 | { | |
72330bd6 AC |
1393 | warning |
1394 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1395 | var->obj_name); | |
8b93c638 JM |
1396 | return; |
1397 | } | |
1398 | ||
1399 | if (prev == NULL) | |
1400 | *(varobj_table + index) = cv->next; | |
1401 | else | |
1402 | prev->next = cv->next; | |
1403 | ||
b8c9b27d | 1404 | xfree (cv); |
8b93c638 JM |
1405 | |
1406 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1407 | if (is_root_p (var)) |
8b93c638 JM |
1408 | { |
1409 | /* Remove from list of root variables */ | |
1410 | if (rootlist == var->root) | |
1411 | rootlist = var->root->next; | |
1412 | else | |
1413 | { | |
1414 | prer = NULL; | |
1415 | cr = rootlist; | |
1416 | while ((cr != NULL) && (cr->rootvar != var)) | |
1417 | { | |
1418 | prer = cr; | |
1419 | cr = cr->next; | |
1420 | } | |
1421 | if (cr == NULL) | |
1422 | { | |
72330bd6 AC |
1423 | warning |
1424 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1425 | var->obj_name); | |
8b93c638 JM |
1426 | return; |
1427 | } | |
1428 | if (prer == NULL) | |
1429 | rootlist = NULL; | |
1430 | else | |
1431 | prer->next = cr->next; | |
1432 | } | |
1433 | rootcount--; | |
1434 | } | |
1435 | ||
1436 | } | |
1437 | ||
8b93c638 JM |
1438 | /* Create and install a child of the parent of the given name */ |
1439 | static struct varobj * | |
fba45db2 | 1440 | create_child (struct varobj *parent, int index, char *name) |
8b93c638 JM |
1441 | { |
1442 | struct varobj *child; | |
1443 | char *childs_name; | |
acd65feb | 1444 | struct value *value; |
8b93c638 JM |
1445 | |
1446 | child = new_variable (); | |
1447 | ||
1448 | /* name is allocated by name_of_child */ | |
1449 | child->name = name; | |
1450 | child->index = index; | |
acd65feb | 1451 | value = value_of_child (parent, index); |
8b93c638 JM |
1452 | child->parent = parent; |
1453 | child->root = parent->root; | |
b435e160 | 1454 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1455 | child->obj_name = childs_name; |
1456 | install_variable (child); | |
1457 | ||
acd65feb VP |
1458 | /* Compute the type of the child. Must do this before |
1459 | calling install_new_value. */ | |
1460 | if (value != NULL) | |
1461 | /* If the child had no evaluation errors, var->value | |
1462 | will be non-NULL and contain a valid type. */ | |
1463 | child->type = value_type (value); | |
1464 | else | |
1465 | /* Otherwise, we must compute the type. */ | |
1466 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1467 | child->index); | |
1468 | install_new_value (child, value, 1); | |
1469 | ||
8b93c638 JM |
1470 | return child; |
1471 | } | |
8b93c638 JM |
1472 | \f |
1473 | ||
1474 | /* | |
1475 | * Miscellaneous utility functions. | |
1476 | */ | |
1477 | ||
1478 | /* Allocate memory and initialize a new variable */ | |
1479 | static struct varobj * | |
1480 | new_variable (void) | |
1481 | { | |
1482 | struct varobj *var; | |
1483 | ||
1484 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1485 | var->name = NULL; | |
02142340 | 1486 | var->path_expr = NULL; |
8b93c638 JM |
1487 | var->obj_name = NULL; |
1488 | var->index = -1; | |
1489 | var->type = NULL; | |
1490 | var->value = NULL; | |
8b93c638 JM |
1491 | var->num_children = -1; |
1492 | var->parent = NULL; | |
1493 | var->children = NULL; | |
1494 | var->format = 0; | |
1495 | var->root = NULL; | |
fb9b6b35 | 1496 | var->updated = 0; |
85265413 | 1497 | var->print_value = NULL; |
25d5ea92 VP |
1498 | var->frozen = 0; |
1499 | var->not_fetched = 0; | |
8b93c638 JM |
1500 | |
1501 | return var; | |
1502 | } | |
1503 | ||
1504 | /* Allocate memory and initialize a new root variable */ | |
1505 | static struct varobj * | |
1506 | new_root_variable (void) | |
1507 | { | |
1508 | struct varobj *var = new_variable (); | |
1509 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1510 | var->root->lang = NULL; | |
1511 | var->root->exp = NULL; | |
1512 | var->root->valid_block = NULL; | |
7a424e99 | 1513 | var->root->frame = null_frame_id; |
a5defcdc | 1514 | var->root->floating = 0; |
8b93c638 | 1515 | var->root->rootvar = NULL; |
8756216b | 1516 | var->root->is_valid = 1; |
8b93c638 JM |
1517 | |
1518 | return var; | |
1519 | } | |
1520 | ||
1521 | /* Free any allocated memory associated with VAR. */ | |
1522 | static void | |
fba45db2 | 1523 | free_variable (struct varobj *var) |
8b93c638 | 1524 | { |
36746093 JK |
1525 | value_free (var->value); |
1526 | ||
8b93c638 | 1527 | /* Free the expression if this is a root variable. */ |
b2c2bd75 | 1528 | if (is_root_p (var)) |
8b93c638 | 1529 | { |
3038237c | 1530 | xfree (var->root->exp); |
8038e1e2 | 1531 | xfree (var->root); |
8b93c638 JM |
1532 | } |
1533 | ||
8038e1e2 AC |
1534 | xfree (var->name); |
1535 | xfree (var->obj_name); | |
85265413 | 1536 | xfree (var->print_value); |
02142340 | 1537 | xfree (var->path_expr); |
8038e1e2 | 1538 | xfree (var); |
8b93c638 JM |
1539 | } |
1540 | ||
74b7792f AC |
1541 | static void |
1542 | do_free_variable_cleanup (void *var) | |
1543 | { | |
1544 | free_variable (var); | |
1545 | } | |
1546 | ||
1547 | static struct cleanup * | |
1548 | make_cleanup_free_variable (struct varobj *var) | |
1549 | { | |
1550 | return make_cleanup (do_free_variable_cleanup, var); | |
1551 | } | |
1552 | ||
6766a268 DJ |
1553 | /* This returns the type of the variable. It also skips past typedefs |
1554 | to return the real type of the variable. | |
94b66fa7 KS |
1555 | |
1556 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1557 | except within get_target_type and get_type. */ | |
8b93c638 | 1558 | static struct type * |
fba45db2 | 1559 | get_type (struct varobj *var) |
8b93c638 JM |
1560 | { |
1561 | struct type *type; | |
1562 | type = var->type; | |
1563 | ||
6766a268 DJ |
1564 | if (type != NULL) |
1565 | type = check_typedef (type); | |
8b93c638 JM |
1566 | |
1567 | return type; | |
1568 | } | |
1569 | ||
6e2a9270 VP |
1570 | /* Return the type of the value that's stored in VAR, |
1571 | or that would have being stored there if the | |
1572 | value were accessible. | |
1573 | ||
1574 | This differs from VAR->type in that VAR->type is always | |
1575 | the true type of the expession in the source language. | |
1576 | The return value of this function is the type we're | |
1577 | actually storing in varobj, and using for displaying | |
1578 | the values and for comparing previous and new values. | |
1579 | ||
1580 | For example, top-level references are always stripped. */ | |
1581 | static struct type * | |
1582 | get_value_type (struct varobj *var) | |
1583 | { | |
1584 | struct type *type; | |
1585 | ||
1586 | if (var->value) | |
1587 | type = value_type (var->value); | |
1588 | else | |
1589 | type = var->type; | |
1590 | ||
1591 | type = check_typedef (type); | |
1592 | ||
1593 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1594 | type = get_target_type (type); | |
1595 | ||
1596 | type = check_typedef (type); | |
1597 | ||
1598 | return type; | |
1599 | } | |
1600 | ||
8b93c638 | 1601 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
1602 | past typedefs, just like get_type (). |
1603 | ||
1604 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1605 | except within get_target_type and get_type. */ | |
8b93c638 | 1606 | static struct type * |
fba45db2 | 1607 | get_target_type (struct type *type) |
8b93c638 JM |
1608 | { |
1609 | if (type != NULL) | |
1610 | { | |
1611 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1612 | if (type != NULL) |
1613 | type = check_typedef (type); | |
8b93c638 JM |
1614 | } |
1615 | ||
1616 | return type; | |
1617 | } | |
1618 | ||
1619 | /* What is the default display for this variable? We assume that | |
1620 | everything is "natural". Any exceptions? */ | |
1621 | static enum varobj_display_formats | |
fba45db2 | 1622 | variable_default_display (struct varobj *var) |
8b93c638 JM |
1623 | { |
1624 | return FORMAT_NATURAL; | |
1625 | } | |
1626 | ||
8b93c638 JM |
1627 | /* FIXME: The following should be generic for any pointer */ |
1628 | static void | |
fba45db2 | 1629 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
1630 | { |
1631 | struct cpstack *s; | |
1632 | ||
1633 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1634 | s->name = name; | |
1635 | s->next = *pstack; | |
1636 | *pstack = s; | |
1637 | } | |
1638 | ||
1639 | /* FIXME: The following should be generic for any pointer */ | |
1640 | static char * | |
fba45db2 | 1641 | cppop (struct cpstack **pstack) |
8b93c638 JM |
1642 | { |
1643 | struct cpstack *s; | |
1644 | char *v; | |
1645 | ||
1646 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1647 | return NULL; | |
1648 | ||
1649 | s = *pstack; | |
1650 | v = s->name; | |
1651 | *pstack = (*pstack)->next; | |
b8c9b27d | 1652 | xfree (s); |
8b93c638 JM |
1653 | |
1654 | return v; | |
1655 | } | |
1656 | \f | |
1657 | /* | |
1658 | * Language-dependencies | |
1659 | */ | |
1660 | ||
1661 | /* Common entry points */ | |
1662 | ||
1663 | /* Get the language of variable VAR. */ | |
1664 | static enum varobj_languages | |
fba45db2 | 1665 | variable_language (struct varobj *var) |
8b93c638 JM |
1666 | { |
1667 | enum varobj_languages lang; | |
1668 | ||
1669 | switch (var->root->exp->language_defn->la_language) | |
1670 | { | |
1671 | default: | |
1672 | case language_c: | |
1673 | lang = vlang_c; | |
1674 | break; | |
1675 | case language_cplus: | |
1676 | lang = vlang_cplus; | |
1677 | break; | |
1678 | case language_java: | |
1679 | lang = vlang_java; | |
1680 | break; | |
1681 | } | |
1682 | ||
1683 | return lang; | |
1684 | } | |
1685 | ||
1686 | /* Return the number of children for a given variable. | |
1687 | The result of this function is defined by the language | |
1688 | implementation. The number of children returned by this function | |
1689 | is the number of children that the user will see in the variable | |
1690 | display. */ | |
1691 | static int | |
fba45db2 | 1692 | number_of_children (struct varobj *var) |
8b93c638 JM |
1693 | { |
1694 | return (*var->root->lang->number_of_children) (var);; | |
1695 | } | |
1696 | ||
1697 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1698 | static char * | |
fba45db2 | 1699 | name_of_variable (struct varobj *var) |
8b93c638 JM |
1700 | { |
1701 | return (*var->root->lang->name_of_variable) (var); | |
1702 | } | |
1703 | ||
1704 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1705 | static char * | |
fba45db2 | 1706 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
1707 | { |
1708 | return (*var->root->lang->name_of_child) (var, index); | |
1709 | } | |
1710 | ||
a5defcdc VP |
1711 | /* What is the ``struct value *'' of the root variable VAR? |
1712 | For floating variable object, evaluation can get us a value | |
1713 | of different type from what is stored in varobj already. In | |
1714 | that case: | |
1715 | - *type_changed will be set to 1 | |
1716 | - old varobj will be freed, and new one will be | |
1717 | created, with the same name. | |
1718 | - *var_handle will be set to the new varobj | |
1719 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 1720 | static struct value * |
fba45db2 | 1721 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 1722 | { |
73a93a32 JI |
1723 | struct varobj *var; |
1724 | ||
1725 | if (var_handle == NULL) | |
1726 | return NULL; | |
1727 | ||
1728 | var = *var_handle; | |
1729 | ||
1730 | /* This should really be an exception, since this should | |
1731 | only get called with a root variable. */ | |
1732 | ||
b2c2bd75 | 1733 | if (!is_root_p (var)) |
73a93a32 JI |
1734 | return NULL; |
1735 | ||
a5defcdc | 1736 | if (var->root->floating) |
73a93a32 JI |
1737 | { |
1738 | struct varobj *tmp_var; | |
1739 | char *old_type, *new_type; | |
6225abfa | 1740 | |
73a93a32 JI |
1741 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
1742 | USE_SELECTED_FRAME); | |
1743 | if (tmp_var == NULL) | |
1744 | { | |
1745 | return NULL; | |
1746 | } | |
6225abfa | 1747 | old_type = varobj_get_type (var); |
73a93a32 | 1748 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 1749 | if (strcmp (old_type, new_type) == 0) |
73a93a32 | 1750 | { |
fcacd99f VP |
1751 | /* The expression presently stored inside var->root->exp |
1752 | remembers the locations of local variables relatively to | |
1753 | the frame where the expression was created (in DWARF location | |
1754 | button, for example). Naturally, those locations are not | |
1755 | correct in other frames, so update the expression. */ | |
1756 | ||
1757 | struct expression *tmp_exp = var->root->exp; | |
1758 | var->root->exp = tmp_var->root->exp; | |
1759 | tmp_var->root->exp = tmp_exp; | |
1760 | ||
73a93a32 JI |
1761 | varobj_delete (tmp_var, NULL, 0); |
1762 | *type_changed = 0; | |
1763 | } | |
1764 | else | |
1765 | { | |
1b36a34b | 1766 | tmp_var->obj_name = xstrdup (var->obj_name); |
a5defcdc VP |
1767 | varobj_delete (var, NULL, 0); |
1768 | ||
73a93a32 JI |
1769 | install_variable (tmp_var); |
1770 | *var_handle = tmp_var; | |
705da579 | 1771 | var = *var_handle; |
73a93a32 JI |
1772 | *type_changed = 1; |
1773 | } | |
74dddad3 MS |
1774 | xfree (old_type); |
1775 | xfree (new_type); | |
73a93a32 JI |
1776 | } |
1777 | else | |
1778 | { | |
1779 | *type_changed = 0; | |
1780 | } | |
1781 | ||
1782 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1783 | } |
1784 | ||
30b28db1 AC |
1785 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
1786 | static struct value * | |
fba45db2 | 1787 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 1788 | { |
30b28db1 | 1789 | struct value *value; |
8b93c638 JM |
1790 | |
1791 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1792 | ||
8b93c638 JM |
1793 | return value; |
1794 | } | |
1795 | ||
8b93c638 JM |
1796 | /* GDB already has a command called "value_of_variable". Sigh. */ |
1797 | static char * | |
de051565 | 1798 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 1799 | { |
8756216b | 1800 | if (var->root->is_valid) |
de051565 | 1801 | return (*var->root->lang->value_of_variable) (var, format); |
8756216b DP |
1802 | else |
1803 | return NULL; | |
8b93c638 JM |
1804 | } |
1805 | ||
85265413 NR |
1806 | static char * |
1807 | value_get_print_value (struct value *value, enum varobj_display_formats format) | |
1808 | { | |
1809 | long dummy; | |
57e66780 DJ |
1810 | struct ui_file *stb; |
1811 | struct cleanup *old_chain; | |
85265413 | 1812 | char *thevalue; |
79a45b7d | 1813 | struct value_print_options opts; |
57e66780 DJ |
1814 | |
1815 | if (value == NULL) | |
1816 | return NULL; | |
1817 | ||
1818 | stb = mem_fileopen (); | |
1819 | old_chain = make_cleanup_ui_file_delete (stb); | |
1820 | ||
79a45b7d TT |
1821 | get_formatted_print_options (&opts, format_code[(int) format]); |
1822 | opts.deref_ref = 0; | |
1823 | common_val_print (value, stb, 0, &opts, current_language); | |
85265413 | 1824 | thevalue = ui_file_xstrdup (stb, &dummy); |
57e66780 | 1825 | |
85265413 NR |
1826 | do_cleanups (old_chain); |
1827 | return thevalue; | |
1828 | } | |
1829 | ||
340a7723 NR |
1830 | int |
1831 | varobj_editable_p (struct varobj *var) | |
1832 | { | |
1833 | struct type *type; | |
1834 | struct value *value; | |
1835 | ||
1836 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
1837 | return 0; | |
1838 | ||
1839 | type = get_value_type (var); | |
1840 | ||
1841 | switch (TYPE_CODE (type)) | |
1842 | { | |
1843 | case TYPE_CODE_STRUCT: | |
1844 | case TYPE_CODE_UNION: | |
1845 | case TYPE_CODE_ARRAY: | |
1846 | case TYPE_CODE_FUNC: | |
1847 | case TYPE_CODE_METHOD: | |
1848 | return 0; | |
1849 | break; | |
1850 | ||
1851 | default: | |
1852 | return 1; | |
1853 | break; | |
1854 | } | |
1855 | } | |
1856 | ||
acd65feb VP |
1857 | /* Return non-zero if changes in value of VAR |
1858 | must be detected and reported by -var-update. | |
1859 | Return zero is -var-update should never report | |
1860 | changes of such values. This makes sense for structures | |
1861 | (since the changes in children values will be reported separately), | |
1862 | or for artifical objects (like 'public' pseudo-field in C++). | |
1863 | ||
1864 | Return value of 0 means that gdb need not call value_fetch_lazy | |
1865 | for the value of this variable object. */ | |
8b93c638 | 1866 | static int |
b2c2bd75 | 1867 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
1868 | { |
1869 | int r; | |
1870 | struct type *type; | |
1871 | ||
1872 | if (CPLUS_FAKE_CHILD (var)) | |
1873 | return 0; | |
1874 | ||
6e2a9270 | 1875 | type = get_value_type (var); |
8b93c638 JM |
1876 | |
1877 | switch (TYPE_CODE (type)) | |
1878 | { | |
72330bd6 AC |
1879 | case TYPE_CODE_STRUCT: |
1880 | case TYPE_CODE_UNION: | |
1881 | case TYPE_CODE_ARRAY: | |
1882 | r = 0; | |
1883 | break; | |
8b93c638 | 1884 | |
72330bd6 AC |
1885 | default: |
1886 | r = 1; | |
8b93c638 JM |
1887 | } |
1888 | ||
1889 | return r; | |
1890 | } | |
1891 | ||
5a413362 VP |
1892 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
1893 | selected frame, and not bound to thread/frame. Such variable objects | |
1894 | are created using '@' as frame specifier to -var-create. */ | |
1895 | int | |
1896 | varobj_floating_p (struct varobj *var) | |
1897 | { | |
1898 | return var->root->floating; | |
1899 | } | |
1900 | ||
2024f65a VP |
1901 | /* Given the value and the type of a variable object, |
1902 | adjust the value and type to those necessary | |
1903 | for getting children of the variable object. | |
1904 | This includes dereferencing top-level references | |
1905 | to all types and dereferencing pointers to | |
1906 | structures. | |
1907 | ||
1908 | Both TYPE and *TYPE should be non-null. VALUE | |
1909 | can be null if we want to only translate type. | |
1910 | *VALUE can be null as well -- if the parent | |
02142340 VP |
1911 | value is not known. |
1912 | ||
1913 | If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1 | |
1914 | depending on whether pointer was deferenced | |
1915 | in this function. */ | |
2024f65a VP |
1916 | static void |
1917 | adjust_value_for_child_access (struct value **value, | |
02142340 VP |
1918 | struct type **type, |
1919 | int *was_ptr) | |
2024f65a VP |
1920 | { |
1921 | gdb_assert (type && *type); | |
1922 | ||
02142340 VP |
1923 | if (was_ptr) |
1924 | *was_ptr = 0; | |
1925 | ||
2024f65a VP |
1926 | *type = check_typedef (*type); |
1927 | ||
1928 | /* The type of value stored in varobj, that is passed | |
1929 | to us, is already supposed to be | |
1930 | reference-stripped. */ | |
1931 | ||
1932 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
1933 | ||
1934 | /* Pointers to structures are treated just like | |
1935 | structures when accessing children. Don't | |
1936 | dererences pointers to other types. */ | |
1937 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
1938 | { | |
1939 | struct type *target_type = get_target_type (*type); | |
1940 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
1941 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
1942 | { | |
1943 | if (value && *value) | |
3f4178d6 DJ |
1944 | { |
1945 | int success = gdb_value_ind (*value, value); | |
1946 | if (!success) | |
1947 | *value = NULL; | |
1948 | } | |
2024f65a | 1949 | *type = target_type; |
02142340 VP |
1950 | if (was_ptr) |
1951 | *was_ptr = 1; | |
2024f65a VP |
1952 | } |
1953 | } | |
1954 | ||
1955 | /* The 'get_target_type' function calls check_typedef on | |
1956 | result, so we can immediately check type code. No | |
1957 | need to call check_typedef here. */ | |
1958 | } | |
1959 | ||
8b93c638 JM |
1960 | /* C */ |
1961 | static int | |
fba45db2 | 1962 | c_number_of_children (struct varobj *var) |
8b93c638 | 1963 | { |
2024f65a VP |
1964 | struct type *type = get_value_type (var); |
1965 | int children = 0; | |
8b93c638 | 1966 | struct type *target; |
8b93c638 | 1967 | |
02142340 | 1968 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 | 1969 | target = get_target_type (type); |
8b93c638 JM |
1970 | |
1971 | switch (TYPE_CODE (type)) | |
1972 | { | |
1973 | case TYPE_CODE_ARRAY: | |
1974 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
d78df370 | 1975 | && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
8b93c638 JM |
1976 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
1977 | else | |
74a44383 DJ |
1978 | /* If we don't know how many elements there are, don't display |
1979 | any. */ | |
1980 | children = 0; | |
8b93c638 JM |
1981 | break; |
1982 | ||
1983 | case TYPE_CODE_STRUCT: | |
1984 | case TYPE_CODE_UNION: | |
1985 | children = TYPE_NFIELDS (type); | |
1986 | break; | |
1987 | ||
1988 | case TYPE_CODE_PTR: | |
2024f65a VP |
1989 | /* The type here is a pointer to non-struct. Typically, pointers |
1990 | have one child, except for function ptrs, which have no children, | |
1991 | and except for void*, as we don't know what to show. | |
1992 | ||
0755e6c1 FN |
1993 | We can show char* so we allow it to be dereferenced. If you decide |
1994 | to test for it, please mind that a little magic is necessary to | |
1995 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
1996 | TYPE_NAME == "char" */ | |
2024f65a VP |
1997 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
1998 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
1999 | children = 0; | |
2000 | else | |
2001 | children = 1; | |
8b93c638 JM |
2002 | break; |
2003 | ||
2004 | default: | |
2005 | /* Other types have no children */ | |
2006 | break; | |
2007 | } | |
2008 | ||
2009 | return children; | |
2010 | } | |
2011 | ||
2012 | static char * | |
fba45db2 | 2013 | c_name_of_variable (struct varobj *parent) |
8b93c638 | 2014 | { |
1b36a34b | 2015 | return xstrdup (parent->name); |
8b93c638 JM |
2016 | } |
2017 | ||
bbec2603 VP |
2018 | /* Return the value of element TYPE_INDEX of a structure |
2019 | value VALUE. VALUE's type should be a structure, | |
2020 | or union, or a typedef to struct/union. | |
2021 | ||
2022 | Returns NULL if getting the value fails. Never throws. */ | |
2023 | static struct value * | |
2024 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 2025 | { |
bbec2603 VP |
2026 | struct value *result = NULL; |
2027 | volatile struct gdb_exception e; | |
8b93c638 | 2028 | |
bbec2603 VP |
2029 | struct type *type = value_type (value); |
2030 | type = check_typedef (type); | |
2031 | ||
2032 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2033 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 2034 | |
bbec2603 VP |
2035 | TRY_CATCH (e, RETURN_MASK_ERROR) |
2036 | { | |
d6a843b5 | 2037 | if (field_is_static (&TYPE_FIELD (type, type_index))) |
bbec2603 VP |
2038 | result = value_static_field (type, type_index); |
2039 | else | |
2040 | result = value_primitive_field (value, 0, type_index, type); | |
2041 | } | |
2042 | if (e.reason < 0) | |
2043 | { | |
2044 | return NULL; | |
2045 | } | |
2046 | else | |
2047 | { | |
2048 | return result; | |
2049 | } | |
2050 | } | |
2051 | ||
2052 | /* Obtain the information about child INDEX of the variable | |
2053 | object PARENT. | |
2054 | If CNAME is not null, sets *CNAME to the name of the child relative | |
2055 | to the parent. | |
2056 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
2057 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
2058 | ||
2059 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
2060 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
2061 | to NULL. */ | |
2062 | static void | |
2063 | c_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2064 | char **cname, struct value **cvalue, struct type **ctype, |
2065 | char **cfull_expression) | |
bbec2603 VP |
2066 | { |
2067 | struct value *value = parent->value; | |
2024f65a | 2068 | struct type *type = get_value_type (parent); |
02142340 VP |
2069 | char *parent_expression = NULL; |
2070 | int was_ptr; | |
bbec2603 VP |
2071 | |
2072 | if (cname) | |
2073 | *cname = NULL; | |
2074 | if (cvalue) | |
2075 | *cvalue = NULL; | |
2076 | if (ctype) | |
2077 | *ctype = NULL; | |
02142340 VP |
2078 | if (cfull_expression) |
2079 | { | |
2080 | *cfull_expression = NULL; | |
2081 | parent_expression = varobj_get_path_expr (parent); | |
2082 | } | |
2083 | adjust_value_for_child_access (&value, &type, &was_ptr); | |
bbec2603 | 2084 | |
8b93c638 JM |
2085 | switch (TYPE_CODE (type)) |
2086 | { | |
2087 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
2088 | if (cname) |
2089 | *cname = xstrprintf ("%d", index | |
2090 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2091 | ||
2092 | if (cvalue && value) | |
2093 | { | |
2094 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
2095 | struct value *indval = | |
6d84d3d8 | 2096 | value_from_longest (builtin_type_int32, (LONGEST) real_index); |
bbec2603 VP |
2097 | gdb_value_subscript (value, indval, cvalue); |
2098 | } | |
2099 | ||
2100 | if (ctype) | |
2101 | *ctype = get_target_type (type); | |
2102 | ||
02142340 VP |
2103 | if (cfull_expression) |
2104 | *cfull_expression = xstrprintf ("(%s)[%d]", parent_expression, | |
2105 | index | |
2106 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2107 | ||
2108 | ||
8b93c638 JM |
2109 | break; |
2110 | ||
2111 | case TYPE_CODE_STRUCT: | |
2112 | case TYPE_CODE_UNION: | |
bbec2603 | 2113 | if (cname) |
1b36a34b | 2114 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); |
bbec2603 VP |
2115 | |
2116 | if (cvalue && value) | |
2117 | { | |
2118 | /* For C, varobj index is the same as type index. */ | |
2119 | *cvalue = value_struct_element_index (value, index); | |
2120 | } | |
2121 | ||
2122 | if (ctype) | |
2123 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2124 | ||
02142340 VP |
2125 | if (cfull_expression) |
2126 | { | |
2127 | char *join = was_ptr ? "->" : "."; | |
2128 | *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, join, | |
2129 | TYPE_FIELD_NAME (type, index)); | |
2130 | } | |
2131 | ||
8b93c638 JM |
2132 | break; |
2133 | ||
2134 | case TYPE_CODE_PTR: | |
bbec2603 VP |
2135 | if (cname) |
2136 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 2137 | |
bbec2603 | 2138 | if (cvalue && value) |
3f4178d6 DJ |
2139 | { |
2140 | int success = gdb_value_ind (value, cvalue); | |
2141 | if (!success) | |
2142 | *cvalue = NULL; | |
2143 | } | |
bbec2603 | 2144 | |
2024f65a VP |
2145 | /* Don't use get_target_type because it calls |
2146 | check_typedef and here, we want to show the true | |
2147 | declared type of the variable. */ | |
bbec2603 | 2148 | if (ctype) |
2024f65a | 2149 | *ctype = TYPE_TARGET_TYPE (type); |
02142340 VP |
2150 | |
2151 | if (cfull_expression) | |
2152 | *cfull_expression = xstrprintf ("*(%s)", parent_expression); | |
bbec2603 | 2153 | |
8b93c638 JM |
2154 | break; |
2155 | ||
2156 | default: | |
2157 | /* This should not happen */ | |
bbec2603 VP |
2158 | if (cname) |
2159 | *cname = xstrdup ("???"); | |
02142340 VP |
2160 | if (cfull_expression) |
2161 | *cfull_expression = xstrdup ("???"); | |
bbec2603 | 2162 | /* Don't set value and type, we don't know then. */ |
8b93c638 | 2163 | } |
bbec2603 | 2164 | } |
8b93c638 | 2165 | |
bbec2603 VP |
2166 | static char * |
2167 | c_name_of_child (struct varobj *parent, int index) | |
2168 | { | |
2169 | char *name; | |
02142340 | 2170 | c_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2171 | return name; |
2172 | } | |
2173 | ||
02142340 VP |
2174 | static char * |
2175 | c_path_expr_of_child (struct varobj *child) | |
2176 | { | |
2177 | c_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2178 | &child->path_expr); | |
2179 | return child->path_expr; | |
2180 | } | |
2181 | ||
c5b48eac VP |
2182 | /* If frame associated with VAR can be found, switch |
2183 | to it and return 1. Otherwise, return 0. */ | |
2184 | static int | |
2185 | check_scope (struct varobj *var) | |
2186 | { | |
2187 | struct frame_info *fi; | |
2188 | int scope; | |
2189 | ||
2190 | fi = frame_find_by_id (var->root->frame); | |
2191 | scope = fi != NULL; | |
2192 | ||
2193 | if (fi) | |
2194 | { | |
2195 | CORE_ADDR pc = get_frame_pc (fi); | |
2196 | if (pc < BLOCK_START (var->root->valid_block) || | |
2197 | pc >= BLOCK_END (var->root->valid_block)) | |
2198 | scope = 0; | |
2199 | else | |
2200 | select_frame (fi); | |
2201 | } | |
2202 | return scope; | |
2203 | } | |
2204 | ||
30b28db1 | 2205 | static struct value * |
fba45db2 | 2206 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 2207 | { |
5e572bb4 | 2208 | struct value *new_val = NULL; |
73a93a32 | 2209 | struct varobj *var = *var_handle; |
8b93c638 | 2210 | struct frame_info *fi; |
c5b48eac | 2211 | int within_scope = 0; |
6208b47d VP |
2212 | struct cleanup *back_to; |
2213 | ||
73a93a32 | 2214 | /* Only root variables can be updated... */ |
b2c2bd75 | 2215 | if (!is_root_p (var)) |
73a93a32 JI |
2216 | /* Not a root var */ |
2217 | return NULL; | |
2218 | ||
4f8d22e3 | 2219 | back_to = make_cleanup_restore_current_thread (); |
72330bd6 | 2220 | |
8b93c638 | 2221 | /* Determine whether the variable is still around. */ |
a5defcdc | 2222 | if (var->root->valid_block == NULL || var->root->floating) |
8b93c638 | 2223 | within_scope = 1; |
c5b48eac VP |
2224 | else if (var->root->thread_id == 0) |
2225 | { | |
2226 | /* The program was single-threaded when the variable object was | |
2227 | created. Technically, it's possible that the program became | |
2228 | multi-threaded since then, but we don't support such | |
2229 | scenario yet. */ | |
2230 | within_scope = check_scope (var); | |
2231 | } | |
8b93c638 JM |
2232 | else |
2233 | { | |
c5b48eac VP |
2234 | ptid_t ptid = thread_id_to_pid (var->root->thread_id); |
2235 | if (in_thread_list (ptid)) | |
d2353924 | 2236 | { |
c5b48eac VP |
2237 | switch_to_thread (ptid); |
2238 | within_scope = check_scope (var); | |
2239 | } | |
8b93c638 | 2240 | } |
72330bd6 | 2241 | |
8b93c638 JM |
2242 | if (within_scope) |
2243 | { | |
73a93a32 | 2244 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
2245 | expression fails we want to just return NULL. */ |
2246 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
2247 | return new_val; |
2248 | } | |
2249 | ||
6208b47d VP |
2250 | do_cleanups (back_to); |
2251 | ||
8b93c638 JM |
2252 | return NULL; |
2253 | } | |
2254 | ||
30b28db1 | 2255 | static struct value * |
fba45db2 | 2256 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2257 | { |
bbec2603 | 2258 | struct value *value = NULL; |
02142340 | 2259 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2260 | |
2261 | return value; | |
2262 | } | |
2263 | ||
2264 | static struct type * | |
fba45db2 | 2265 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2266 | { |
bbec2603 | 2267 | struct type *type = NULL; |
02142340 | 2268 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2269 | return type; |
2270 | } | |
2271 | ||
8b93c638 | 2272 | static char * |
de051565 | 2273 | c_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2274 | { |
14b3d9c9 JB |
2275 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2276 | it will print out its children instead of "{...}". So we need to | |
2277 | catch that case explicitly. */ | |
2278 | struct type *type = get_type (var); | |
e64d9b3d | 2279 | |
14b3d9c9 JB |
2280 | /* Strip top-level references. */ |
2281 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2282 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2283 | ||
2284 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2285 | { |
2286 | case TYPE_CODE_STRUCT: | |
2287 | case TYPE_CODE_UNION: | |
2288 | return xstrdup ("{...}"); | |
2289 | /* break; */ | |
2290 | ||
2291 | case TYPE_CODE_ARRAY: | |
2292 | { | |
e64d9b3d | 2293 | char *number; |
b435e160 | 2294 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2295 | return (number); |
8b93c638 JM |
2296 | } |
2297 | /* break; */ | |
2298 | ||
2299 | default: | |
2300 | { | |
575bbeb6 KS |
2301 | if (var->value == NULL) |
2302 | { | |
2303 | /* This can happen if we attempt to get the value of a struct | |
2304 | member when the parent is an invalid pointer. This is an | |
2305 | error condition, so we should tell the caller. */ | |
2306 | return NULL; | |
2307 | } | |
2308 | else | |
2309 | { | |
25d5ea92 VP |
2310 | if (var->not_fetched && value_lazy (var->value)) |
2311 | /* Frozen variable and no value yet. We don't | |
2312 | implicitly fetch the value. MI response will | |
2313 | use empty string for the value, which is OK. */ | |
2314 | return NULL; | |
2315 | ||
b2c2bd75 | 2316 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2317 | gdb_assert (!value_lazy (var->value)); |
de051565 MK |
2318 | |
2319 | /* If the specified format is the current one, | |
2320 | we can reuse print_value */ | |
2321 | if (format == var->format) | |
2322 | return xstrdup (var->print_value); | |
2323 | else | |
2324 | return value_get_print_value (var->value, format); | |
85265413 | 2325 | } |
e64d9b3d | 2326 | } |
8b93c638 JM |
2327 | } |
2328 | } | |
2329 | \f | |
2330 | ||
2331 | /* C++ */ | |
2332 | ||
2333 | static int | |
fba45db2 | 2334 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2335 | { |
2336 | struct type *type; | |
2337 | int children, dont_know; | |
2338 | ||
2339 | dont_know = 1; | |
2340 | children = 0; | |
2341 | ||
2342 | if (!CPLUS_FAKE_CHILD (var)) | |
2343 | { | |
2024f65a | 2344 | type = get_value_type (var); |
02142340 | 2345 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2346 | |
2347 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2348 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2349 | { |
2350 | int kids[3]; | |
2351 | ||
2352 | cplus_class_num_children (type, kids); | |
2353 | if (kids[v_public] != 0) | |
2354 | children++; | |
2355 | if (kids[v_private] != 0) | |
2356 | children++; | |
2357 | if (kids[v_protected] != 0) | |
2358 | children++; | |
2359 | ||
2360 | /* Add any baseclasses */ | |
2361 | children += TYPE_N_BASECLASSES (type); | |
2362 | dont_know = 0; | |
2363 | ||
2364 | /* FIXME: save children in var */ | |
2365 | } | |
2366 | } | |
2367 | else | |
2368 | { | |
2369 | int kids[3]; | |
2370 | ||
2024f65a | 2371 | type = get_value_type (var->parent); |
02142340 | 2372 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2373 | |
2374 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2375 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2376 | children = kids[v_public]; |
6e382aa3 | 2377 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2378 | children = kids[v_private]; |
2379 | else | |
2380 | children = kids[v_protected]; | |
2381 | dont_know = 0; | |
2382 | } | |
2383 | ||
2384 | if (dont_know) | |
2385 | children = c_number_of_children (var); | |
2386 | ||
2387 | return children; | |
2388 | } | |
2389 | ||
2390 | /* Compute # of public, private, and protected variables in this class. | |
2391 | That means we need to descend into all baseclasses and find out | |
2392 | how many are there, too. */ | |
2393 | static void | |
1669605f | 2394 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2395 | { |
2396 | int i; | |
2397 | ||
2398 | children[v_public] = 0; | |
2399 | children[v_private] = 0; | |
2400 | children[v_protected] = 0; | |
2401 | ||
2402 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2403 | { | |
2404 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2405 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2406 | continue; |
2407 | ||
2408 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2409 | children[v_protected]++; | |
2410 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2411 | children[v_private]++; | |
2412 | else | |
2413 | children[v_public]++; | |
2414 | } | |
2415 | } | |
2416 | ||
2417 | static char * | |
fba45db2 | 2418 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2419 | { |
2420 | return c_name_of_variable (parent); | |
2421 | } | |
2422 | ||
2024f65a VP |
2423 | enum accessibility { private_field, protected_field, public_field }; |
2424 | ||
2425 | /* Check if field INDEX of TYPE has the specified accessibility. | |
2426 | Return 0 if so and 1 otherwise. */ | |
2427 | static int | |
2428 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 2429 | { |
2024f65a VP |
2430 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
2431 | return 1; | |
2432 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
2433 | return 1; | |
2434 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
2435 | && !TYPE_FIELD_PROTECTED (type, index)) | |
2436 | return 1; | |
2437 | else | |
2438 | return 0; | |
2439 | } | |
2440 | ||
2441 | static void | |
2442 | cplus_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2443 | char **cname, struct value **cvalue, struct type **ctype, |
2444 | char **cfull_expression) | |
2024f65a | 2445 | { |
348144ba | 2446 | char *name = NULL; |
2024f65a | 2447 | struct value *value; |
8b93c638 | 2448 | struct type *type; |
02142340 VP |
2449 | int was_ptr; |
2450 | char *parent_expression = NULL; | |
8b93c638 | 2451 | |
2024f65a VP |
2452 | if (cname) |
2453 | *cname = NULL; | |
2454 | if (cvalue) | |
2455 | *cvalue = NULL; | |
2456 | if (ctype) | |
2457 | *ctype = NULL; | |
02142340 VP |
2458 | if (cfull_expression) |
2459 | *cfull_expression = NULL; | |
2024f65a | 2460 | |
8b93c638 JM |
2461 | if (CPLUS_FAKE_CHILD (parent)) |
2462 | { | |
2024f65a VP |
2463 | value = parent->parent->value; |
2464 | type = get_value_type (parent->parent); | |
02142340 VP |
2465 | if (cfull_expression) |
2466 | parent_expression = varobj_get_path_expr (parent->parent); | |
8b93c638 JM |
2467 | } |
2468 | else | |
2024f65a VP |
2469 | { |
2470 | value = parent->value; | |
2471 | type = get_value_type (parent); | |
02142340 VP |
2472 | if (cfull_expression) |
2473 | parent_expression = varobj_get_path_expr (parent); | |
2024f65a | 2474 | } |
8b93c638 | 2475 | |
02142340 | 2476 | adjust_value_for_child_access (&value, &type, &was_ptr); |
2024f65a VP |
2477 | |
2478 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
3f4178d6 | 2479 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
8b93c638 | 2480 | { |
02142340 | 2481 | char *join = was_ptr ? "->" : "."; |
8b93c638 JM |
2482 | if (CPLUS_FAKE_CHILD (parent)) |
2483 | { | |
6e382aa3 JJ |
2484 | /* The fields of the class type are ordered as they |
2485 | appear in the class. We are given an index for a | |
2486 | particular access control type ("public","protected", | |
2487 | or "private"). We must skip over fields that don't | |
2488 | have the access control we are looking for to properly | |
2489 | find the indexed field. */ | |
2490 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 2491 | enum accessibility acc = public_field; |
6e382aa3 | 2492 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 2493 | acc = private_field; |
6e382aa3 | 2494 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
2495 | acc = protected_field; |
2496 | ||
2497 | while (index >= 0) | |
6e382aa3 | 2498 | { |
2024f65a VP |
2499 | if (TYPE_VPTR_BASETYPE (type) == type |
2500 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2501 | ; /* ignore vptr */ | |
2502 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
2503 | --index; |
2504 | ++type_index; | |
6e382aa3 | 2505 | } |
2024f65a VP |
2506 | --type_index; |
2507 | ||
2508 | if (cname) | |
2509 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
2510 | ||
2511 | if (cvalue && value) | |
2512 | *cvalue = value_struct_element_index (value, type_index); | |
2513 | ||
2514 | if (ctype) | |
2515 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
02142340 VP |
2516 | |
2517 | if (cfull_expression) | |
2518 | *cfull_expression = xstrprintf ("((%s)%s%s)", parent_expression, | |
2519 | join, | |
2520 | TYPE_FIELD_NAME (type, type_index)); | |
2024f65a VP |
2521 | } |
2522 | else if (index < TYPE_N_BASECLASSES (type)) | |
2523 | { | |
2524 | /* This is a baseclass. */ | |
2525 | if (cname) | |
2526 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
2527 | ||
2528 | if (cvalue && value) | |
6e382aa3 | 2529 | { |
2024f65a | 2530 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
02142340 | 2531 | release_value (*cvalue); |
6e382aa3 JJ |
2532 | } |
2533 | ||
2024f65a VP |
2534 | if (ctype) |
2535 | { | |
2536 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2537 | } | |
02142340 VP |
2538 | |
2539 | if (cfull_expression) | |
2540 | { | |
2541 | char *ptr = was_ptr ? "*" : ""; | |
2542 | /* Cast the parent to the base' type. Note that in gdb, | |
2543 | expression like | |
2544 | (Base1)d | |
2545 | will create an lvalue, for all appearences, so we don't | |
2546 | need to use more fancy: | |
2547 | *(Base1*)(&d) | |
2548 | construct. */ | |
2549 | *cfull_expression = xstrprintf ("(%s(%s%s) %s)", | |
2550 | ptr, | |
2551 | TYPE_FIELD_NAME (type, index), | |
2552 | ptr, | |
2553 | parent_expression); | |
2554 | } | |
8b93c638 | 2555 | } |
8b93c638 JM |
2556 | else |
2557 | { | |
348144ba | 2558 | char *access = NULL; |
6e382aa3 | 2559 | int children[3]; |
2024f65a | 2560 | cplus_class_num_children (type, children); |
6e382aa3 | 2561 | |
8b93c638 | 2562 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2563 | only be "public", "private", or "protected" |
2564 | ||
2565 | The special "fake" children are always output by varobj in | |
2566 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2567 | index -= TYPE_N_BASECLASSES (type); |
2568 | switch (index) | |
2569 | { | |
2570 | case 0: | |
6e382aa3 | 2571 | if (children[v_public] > 0) |
2024f65a | 2572 | access = "public"; |
6e382aa3 | 2573 | else if (children[v_private] > 0) |
2024f65a | 2574 | access = "private"; |
6e382aa3 | 2575 | else |
2024f65a | 2576 | access = "protected"; |
6e382aa3 | 2577 | break; |
8b93c638 | 2578 | case 1: |
6e382aa3 | 2579 | if (children[v_public] > 0) |
8b93c638 | 2580 | { |
6e382aa3 | 2581 | if (children[v_private] > 0) |
2024f65a | 2582 | access = "private"; |
6e382aa3 | 2583 | else |
2024f65a | 2584 | access = "protected"; |
8b93c638 | 2585 | } |
6e382aa3 | 2586 | else if (children[v_private] > 0) |
2024f65a | 2587 | access = "protected"; |
6e382aa3 | 2588 | break; |
8b93c638 | 2589 | case 2: |
6e382aa3 | 2590 | /* Must be protected */ |
2024f65a | 2591 | access = "protected"; |
6e382aa3 | 2592 | break; |
8b93c638 JM |
2593 | default: |
2594 | /* error! */ | |
2595 | break; | |
2596 | } | |
348144ba MS |
2597 | |
2598 | gdb_assert (access); | |
2024f65a VP |
2599 | if (cname) |
2600 | *cname = xstrdup (access); | |
8b93c638 | 2601 | |
02142340 | 2602 | /* Value and type and full expression are null here. */ |
2024f65a | 2603 | } |
8b93c638 | 2604 | } |
8b93c638 JM |
2605 | else |
2606 | { | |
02142340 | 2607 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
2024f65a VP |
2608 | } |
2609 | } | |
8b93c638 | 2610 | |
2024f65a VP |
2611 | static char * |
2612 | cplus_name_of_child (struct varobj *parent, int index) | |
2613 | { | |
2614 | char *name = NULL; | |
02142340 | 2615 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2616 | return name; |
2617 | } | |
2618 | ||
02142340 VP |
2619 | static char * |
2620 | cplus_path_expr_of_child (struct varobj *child) | |
2621 | { | |
2622 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2623 | &child->path_expr); | |
2624 | return child->path_expr; | |
2625 | } | |
2626 | ||
30b28db1 | 2627 | static struct value * |
fba45db2 | 2628 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2629 | { |
73a93a32 | 2630 | return c_value_of_root (var_handle); |
8b93c638 JM |
2631 | } |
2632 | ||
30b28db1 | 2633 | static struct value * |
fba45db2 | 2634 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2635 | { |
2024f65a | 2636 | struct value *value = NULL; |
02142340 | 2637 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2638 | return value; |
2639 | } | |
2640 | ||
2641 | static struct type * | |
fba45db2 | 2642 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2643 | { |
2024f65a | 2644 | struct type *type = NULL; |
02142340 | 2645 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2646 | return type; |
2647 | } | |
2648 | ||
8b93c638 | 2649 | static char * |
de051565 | 2650 | cplus_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 JM |
2651 | { |
2652 | ||
2653 | /* If we have one of our special types, don't print out | |
2654 | any value. */ | |
2655 | if (CPLUS_FAKE_CHILD (var)) | |
2656 | return xstrdup (""); | |
2657 | ||
de051565 | 2658 | return c_value_of_variable (var, format); |
8b93c638 JM |
2659 | } |
2660 | \f | |
2661 | /* Java */ | |
2662 | ||
2663 | static int | |
fba45db2 | 2664 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2665 | { |
2666 | return cplus_number_of_children (var); | |
2667 | } | |
2668 | ||
2669 | static char * | |
fba45db2 | 2670 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2671 | { |
2672 | char *p, *name; | |
2673 | ||
2674 | name = cplus_name_of_variable (parent); | |
2675 | /* If the name has "-" in it, it is because we | |
2676 | needed to escape periods in the name... */ | |
2677 | p = name; | |
2678 | ||
2679 | while (*p != '\000') | |
2680 | { | |
2681 | if (*p == '-') | |
2682 | *p = '.'; | |
2683 | p++; | |
2684 | } | |
2685 | ||
2686 | return name; | |
2687 | } | |
2688 | ||
2689 | static char * | |
fba45db2 | 2690 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2691 | { |
2692 | char *name, *p; | |
2693 | ||
2694 | name = cplus_name_of_child (parent, index); | |
2695 | /* Escape any periods in the name... */ | |
2696 | p = name; | |
2697 | ||
2698 | while (*p != '\000') | |
2699 | { | |
2700 | if (*p == '.') | |
2701 | *p = '-'; | |
2702 | p++; | |
2703 | } | |
2704 | ||
2705 | return name; | |
2706 | } | |
2707 | ||
02142340 VP |
2708 | static char * |
2709 | java_path_expr_of_child (struct varobj *child) | |
2710 | { | |
2711 | return NULL; | |
2712 | } | |
2713 | ||
30b28db1 | 2714 | static struct value * |
fba45db2 | 2715 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2716 | { |
73a93a32 | 2717 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2718 | } |
2719 | ||
30b28db1 | 2720 | static struct value * |
fba45db2 | 2721 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2722 | { |
2723 | return cplus_value_of_child (parent, index); | |
2724 | } | |
2725 | ||
2726 | static struct type * | |
fba45db2 | 2727 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2728 | { |
2729 | return cplus_type_of_child (parent, index); | |
2730 | } | |
2731 | ||
8b93c638 | 2732 | static char * |
de051565 | 2733 | java_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2734 | { |
de051565 | 2735 | return cplus_value_of_variable (var, format); |
8b93c638 JM |
2736 | } |
2737 | \f | |
2738 | extern void _initialize_varobj (void); | |
2739 | void | |
2740 | _initialize_varobj (void) | |
2741 | { | |
2742 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2743 | ||
2744 | varobj_table = xmalloc (sizeof_table); | |
2745 | memset (varobj_table, 0, sizeof_table); | |
2746 | ||
85c07804 AC |
2747 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2748 | &varobjdebug, _("\ | |
2749 | Set varobj debugging."), _("\ | |
2750 | Show varobj debugging."), _("\ | |
2751 | When non-zero, varobj debugging is enabled."), | |
2752 | NULL, | |
920d2a44 | 2753 | show_varobjdebug, |
85c07804 | 2754 | &setlist, &showlist); |
8b93c638 | 2755 | } |
8756216b DP |
2756 | |
2757 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2758 | are defined on globals. | |
2759 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2dbd25e5 | 2760 | |
8756216b DP |
2761 | void |
2762 | varobj_invalidate (void) | |
2763 | { | |
2764 | struct varobj **all_rootvarobj; | |
2765 | struct varobj **varp; | |
2766 | ||
2767 | if (varobj_list (&all_rootvarobj) > 0) | |
2dbd25e5 JK |
2768 | { |
2769 | varp = all_rootvarobj; | |
2770 | while (*varp != NULL) | |
2771 | { | |
2772 | /* Floating varobjs are reparsed on each stop, so we don't care if | |
f4a34a08 JK |
2773 | the presently parsed expression refers to something that's gone. |
2774 | */ | |
2dbd25e5 JK |
2775 | if ((*varp)->root->floating) |
2776 | continue; | |
2777 | ||
2778 | /* global var must be re-evaluated. */ | |
2779 | if ((*varp)->root->valid_block == NULL) | |
2780 | { | |
2781 | struct varobj *tmp_var; | |
2782 | ||
f4a34a08 JK |
2783 | /* Try to create a varobj with same expression. If we succeed |
2784 | replace the old varobj, otherwise invalidate it. */ | |
2785 | tmp_var = varobj_create (NULL, (*varp)->name, (CORE_ADDR) 0, | |
2786 | USE_CURRENT_FRAME); | |
2dbd25e5 JK |
2787 | if (tmp_var != NULL) |
2788 | { | |
2789 | tmp_var->obj_name = xstrdup ((*varp)->obj_name); | |
2790 | varobj_delete (*varp, NULL, 0); | |
2791 | install_variable (tmp_var); | |
2792 | } | |
2793 | else | |
2794 | (*varp)->root->is_valid = 0; | |
2795 | } | |
2796 | else /* locals must be invalidated. */ | |
2797 | (*varp)->root->is_valid = 0; | |
2798 | ||
2799 | varp++; | |
2800 | } | |
2801 | } | |
f7545552 | 2802 | xfree (all_rootvarobj); |
8756216b DP |
2803 | return; |
2804 | } |