Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
0fb0cc75 | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
4c38e0a4 | 4 | 2009, 2010 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" |
0cc7d26f | 32 | #include "gdb_regex.h" |
8b93c638 JM |
33 | |
34 | #include "varobj.h" | |
28335dcc | 35 | #include "vec.h" |
6208b47d VP |
36 | #include "gdbthread.h" |
37 | #include "inferior.h" | |
8b93c638 | 38 | |
b6313243 TT |
39 | #if HAVE_PYTHON |
40 | #include "python/python.h" | |
41 | #include "python/python-internal.h" | |
42 | #else | |
43 | typedef int PyObject; | |
44 | #endif | |
45 | ||
8b93c638 JM |
46 | /* Non-zero if we want to see trace of varobj level stuff. */ |
47 | ||
48 | int varobjdebug = 0; | |
920d2a44 AC |
49 | static void |
50 | show_varobjdebug (struct ui_file *file, int from_tty, | |
51 | struct cmd_list_element *c, const char *value) | |
52 | { | |
53 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
54 | } | |
8b93c638 JM |
55 | |
56 | /* String representations of gdb's format codes */ | |
57 | char *varobj_format_string[] = | |
72330bd6 | 58 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
59 | |
60 | /* String representations of gdb's known languages */ | |
72330bd6 | 61 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 | 62 | |
0cc7d26f TT |
63 | /* True if we want to allow Python-based pretty-printing. */ |
64 | static int pretty_printing = 0; | |
65 | ||
66 | void | |
67 | varobj_enable_pretty_printing (void) | |
68 | { | |
69 | pretty_printing = 1; | |
70 | } | |
71 | ||
8b93c638 JM |
72 | /* Data structures */ |
73 | ||
74 | /* Every root variable has one of these structures saved in its | |
75 | varobj. Members which must be free'd are noted. */ | |
76 | struct varobj_root | |
72330bd6 | 77 | { |
8b93c638 | 78 | |
72330bd6 AC |
79 | /* Alloc'd expression for this parent. */ |
80 | struct expression *exp; | |
8b93c638 | 81 | |
72330bd6 AC |
82 | /* Block for which this expression is valid */ |
83 | struct block *valid_block; | |
8b93c638 | 84 | |
44a67aa7 VP |
85 | /* The frame for this expression. This field is set iff valid_block is |
86 | not NULL. */ | |
e64d9b3d | 87 | struct frame_id frame; |
8b93c638 | 88 | |
c5b48eac VP |
89 | /* The thread ID that this varobj_root belong to. This field |
90 | is only valid if valid_block is not NULL. | |
91 | When not 0, indicates which thread 'frame' belongs to. | |
92 | When 0, indicates that the thread list was empty when the varobj_root | |
93 | was created. */ | |
94 | int thread_id; | |
95 | ||
a5defcdc VP |
96 | /* If 1, the -var-update always recomputes the value in the |
97 | current thread and frame. Otherwise, variable object is | |
98 | always updated in the specific scope/thread/frame */ | |
99 | int floating; | |
73a93a32 | 100 | |
8756216b DP |
101 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
102 | to symbols that do not exist anymore. */ | |
103 | int is_valid; | |
104 | ||
72330bd6 AC |
105 | /* Language info for this variable and its children */ |
106 | struct language_specific *lang; | |
8b93c638 | 107 | |
72330bd6 AC |
108 | /* The varobj for this root node. */ |
109 | struct varobj *rootvar; | |
8b93c638 | 110 | |
72330bd6 AC |
111 | /* Next root variable */ |
112 | struct varobj_root *next; | |
113 | }; | |
8b93c638 JM |
114 | |
115 | /* Every variable in the system has a structure of this type defined | |
116 | for it. This structure holds all information necessary to manipulate | |
117 | a particular object variable. Members which must be freed are noted. */ | |
118 | struct varobj | |
72330bd6 | 119 | { |
8b93c638 | 120 | |
72330bd6 AC |
121 | /* Alloc'd name of the variable for this object.. If this variable is a |
122 | child, then this name will be the child's source name. | |
123 | (bar, not foo.bar) */ | |
124 | /* NOTE: This is the "expression" */ | |
125 | char *name; | |
8b93c638 | 126 | |
02142340 VP |
127 | /* Alloc'd expression for this child. Can be used to create a |
128 | root variable corresponding to this child. */ | |
129 | char *path_expr; | |
130 | ||
72330bd6 AC |
131 | /* The alloc'd name for this variable's object. This is here for |
132 | convenience when constructing this object's children. */ | |
133 | char *obj_name; | |
8b93c638 | 134 | |
72330bd6 AC |
135 | /* Index of this variable in its parent or -1 */ |
136 | int index; | |
8b93c638 | 137 | |
202ddcaa VP |
138 | /* The type of this variable. This can be NULL |
139 | for artifial variable objects -- currently, the "accessibility" | |
140 | variable objects in C++. */ | |
72330bd6 | 141 | struct type *type; |
8b93c638 | 142 | |
b20d8971 VP |
143 | /* The value of this expression or subexpression. A NULL value |
144 | indicates there was an error getting this value. | |
b2c2bd75 VP |
145 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
146 | the value is either NULL, or not lazy. */ | |
30b28db1 | 147 | struct value *value; |
8b93c638 | 148 | |
72330bd6 AC |
149 | /* The number of (immediate) children this variable has */ |
150 | int num_children; | |
8b93c638 | 151 | |
72330bd6 AC |
152 | /* If this object is a child, this points to its immediate parent. */ |
153 | struct varobj *parent; | |
8b93c638 | 154 | |
28335dcc VP |
155 | /* Children of this object. */ |
156 | VEC (varobj_p) *children; | |
8b93c638 | 157 | |
b6313243 TT |
158 | /* Whether the children of this varobj were requested. This field is |
159 | used to decide if dynamic varobj should recompute their children. | |
160 | In the event that the frontend never asked for the children, we | |
161 | can avoid that. */ | |
162 | int children_requested; | |
163 | ||
72330bd6 AC |
164 | /* Description of the root variable. Points to root variable for children. */ |
165 | struct varobj_root *root; | |
8b93c638 | 166 | |
72330bd6 AC |
167 | /* The format of the output for this object */ |
168 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
169 | |
170 | /* Was this variable updated via a varobj_set_value operation */ | |
171 | int updated; | |
85265413 NR |
172 | |
173 | /* Last print value. */ | |
174 | char *print_value; | |
25d5ea92 VP |
175 | |
176 | /* Is this variable frozen. Frozen variables are never implicitly | |
177 | updated by -var-update * | |
178 | or -var-update <direct-or-indirect-parent>. */ | |
179 | int frozen; | |
180 | ||
181 | /* Is the value of this variable intentionally not fetched? It is | |
182 | not fetched if either the variable is frozen, or any parents is | |
183 | frozen. */ | |
184 | int not_fetched; | |
b6313243 | 185 | |
0cc7d26f TT |
186 | /* Sub-range of children which the MI consumer has requested. If |
187 | FROM < 0 or TO < 0, means that all children have been | |
188 | requested. */ | |
189 | int from; | |
190 | int to; | |
191 | ||
192 | /* The pretty-printer constructor. If NULL, then the default | |
193 | pretty-printer will be looked up. If None, then no | |
194 | pretty-printer will be installed. */ | |
195 | PyObject *constructor; | |
196 | ||
b6313243 TT |
197 | /* The pretty-printer that has been constructed. If NULL, then a |
198 | new printer object is needed, and one will be constructed. */ | |
199 | PyObject *pretty_printer; | |
0cc7d26f TT |
200 | |
201 | /* The iterator returned by the printer's 'children' method, or NULL | |
202 | if not available. */ | |
203 | PyObject *child_iter; | |
204 | ||
205 | /* We request one extra item from the iterator, so that we can | |
206 | report to the caller whether there are more items than we have | |
207 | already reported. However, we don't want to install this value | |
208 | when we read it, because that will mess up future updates. So, | |
209 | we stash it here instead. */ | |
210 | PyObject *saved_item; | |
72330bd6 | 211 | }; |
8b93c638 | 212 | |
8b93c638 | 213 | struct cpstack |
72330bd6 AC |
214 | { |
215 | char *name; | |
216 | struct cpstack *next; | |
217 | }; | |
8b93c638 JM |
218 | |
219 | /* A list of varobjs */ | |
220 | ||
221 | struct vlist | |
72330bd6 AC |
222 | { |
223 | struct varobj *var; | |
224 | struct vlist *next; | |
225 | }; | |
8b93c638 JM |
226 | |
227 | /* Private function prototypes */ | |
228 | ||
229 | /* Helper functions for the above subcommands. */ | |
230 | ||
a14ed312 | 231 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 232 | |
a14ed312 KB |
233 | static void delete_variable_1 (struct cpstack **, int *, |
234 | struct varobj *, int, int); | |
8b93c638 | 235 | |
a14ed312 | 236 | static int install_variable (struct varobj *); |
8b93c638 | 237 | |
a14ed312 | 238 | static void uninstall_variable (struct varobj *); |
8b93c638 | 239 | |
a14ed312 | 240 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 241 | |
b6313243 TT |
242 | static struct varobj * |
243 | create_child_with_value (struct varobj *parent, int index, const char *name, | |
244 | struct value *value); | |
245 | ||
8b93c638 JM |
246 | /* Utility routines */ |
247 | ||
a14ed312 | 248 | static struct varobj *new_variable (void); |
8b93c638 | 249 | |
a14ed312 | 250 | static struct varobj *new_root_variable (void); |
8b93c638 | 251 | |
a14ed312 | 252 | static void free_variable (struct varobj *var); |
8b93c638 | 253 | |
74b7792f AC |
254 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
255 | ||
a14ed312 | 256 | static struct type *get_type (struct varobj *var); |
8b93c638 | 257 | |
6e2a9270 VP |
258 | static struct type *get_value_type (struct varobj *var); |
259 | ||
a14ed312 | 260 | static struct type *get_target_type (struct type *); |
8b93c638 | 261 | |
a14ed312 | 262 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 263 | |
a14ed312 | 264 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 265 | |
a14ed312 | 266 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 267 | |
acd65feb VP |
268 | static int install_new_value (struct varobj *var, struct value *value, |
269 | int initial); | |
270 | ||
8b93c638 JM |
271 | /* Language-specific routines. */ |
272 | ||
a14ed312 | 273 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 274 | |
a14ed312 | 275 | static int number_of_children (struct varobj *); |
8b93c638 | 276 | |
a14ed312 | 277 | static char *name_of_variable (struct varobj *); |
8b93c638 | 278 | |
a14ed312 | 279 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 280 | |
30b28db1 | 281 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 282 | |
30b28db1 | 283 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 284 | |
de051565 MK |
285 | static char *my_value_of_variable (struct varobj *var, |
286 | enum varobj_display_formats format); | |
8b93c638 | 287 | |
85265413 | 288 | static char *value_get_print_value (struct value *value, |
b6313243 | 289 | enum varobj_display_formats format, |
d452c4bc | 290 | struct varobj *var); |
85265413 | 291 | |
b2c2bd75 VP |
292 | static int varobj_value_is_changeable_p (struct varobj *var); |
293 | ||
294 | static int is_root_p (struct varobj *var); | |
8b93c638 | 295 | |
d8b65138 JK |
296 | #if HAVE_PYTHON |
297 | ||
b6313243 TT |
298 | static struct varobj * |
299 | varobj_add_child (struct varobj *var, const char *name, struct value *value); | |
300 | ||
d8b65138 JK |
301 | #endif /* HAVE_PYTHON */ |
302 | ||
8b93c638 JM |
303 | /* C implementation */ |
304 | ||
a14ed312 | 305 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 306 | |
a14ed312 | 307 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 308 | |
a14ed312 | 309 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 310 | |
02142340 VP |
311 | static char *c_path_expr_of_child (struct varobj *child); |
312 | ||
30b28db1 | 313 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 314 | |
30b28db1 | 315 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 316 | |
a14ed312 | 317 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 318 | |
de051565 MK |
319 | static char *c_value_of_variable (struct varobj *var, |
320 | enum varobj_display_formats format); | |
8b93c638 JM |
321 | |
322 | /* C++ implementation */ | |
323 | ||
a14ed312 | 324 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 325 | |
a14ed312 | 326 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 327 | |
a14ed312 | 328 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 329 | |
a14ed312 | 330 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 331 | |
02142340 VP |
332 | static char *cplus_path_expr_of_child (struct varobj *child); |
333 | ||
30b28db1 | 334 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 335 | |
30b28db1 | 336 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 337 | |
a14ed312 | 338 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 339 | |
de051565 MK |
340 | static char *cplus_value_of_variable (struct varobj *var, |
341 | enum varobj_display_formats format); | |
8b93c638 JM |
342 | |
343 | /* Java implementation */ | |
344 | ||
a14ed312 | 345 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 346 | |
a14ed312 | 347 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 348 | |
a14ed312 | 349 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 350 | |
02142340 VP |
351 | static char *java_path_expr_of_child (struct varobj *child); |
352 | ||
30b28db1 | 353 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 354 | |
30b28db1 | 355 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 356 | |
a14ed312 | 357 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 358 | |
de051565 MK |
359 | static char *java_value_of_variable (struct varobj *var, |
360 | enum varobj_display_formats format); | |
8b93c638 JM |
361 | |
362 | /* The language specific vector */ | |
363 | ||
364 | struct language_specific | |
72330bd6 | 365 | { |
8b93c638 | 366 | |
72330bd6 AC |
367 | /* The language of this variable */ |
368 | enum varobj_languages language; | |
8b93c638 | 369 | |
72330bd6 AC |
370 | /* The number of children of PARENT. */ |
371 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 372 | |
72330bd6 AC |
373 | /* The name (expression) of a root varobj. */ |
374 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 375 | |
72330bd6 AC |
376 | /* The name of the INDEX'th child of PARENT. */ |
377 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 378 | |
02142340 VP |
379 | /* Returns the rooted expression of CHILD, which is a variable |
380 | obtain that has some parent. */ | |
381 | char *(*path_expr_of_child) (struct varobj * child); | |
382 | ||
30b28db1 AC |
383 | /* The ``struct value *'' of the root variable ROOT. */ |
384 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 385 | |
30b28db1 AC |
386 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
387 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 388 | |
72330bd6 AC |
389 | /* The type of the INDEX'th child of PARENT. */ |
390 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 391 | |
72330bd6 | 392 | /* The current value of VAR. */ |
de051565 MK |
393 | char *(*value_of_variable) (struct varobj * var, |
394 | enum varobj_display_formats format); | |
72330bd6 | 395 | }; |
8b93c638 JM |
396 | |
397 | /* Array of known source language routines. */ | |
d5d6fca5 | 398 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
399 | /* Unknown (try treating as C */ |
400 | { | |
72330bd6 AC |
401 | vlang_unknown, |
402 | c_number_of_children, | |
403 | c_name_of_variable, | |
404 | c_name_of_child, | |
02142340 | 405 | c_path_expr_of_child, |
72330bd6 AC |
406 | c_value_of_root, |
407 | c_value_of_child, | |
408 | c_type_of_child, | |
72330bd6 | 409 | c_value_of_variable} |
8b93c638 JM |
410 | , |
411 | /* C */ | |
412 | { | |
72330bd6 AC |
413 | vlang_c, |
414 | c_number_of_children, | |
415 | c_name_of_variable, | |
416 | c_name_of_child, | |
02142340 | 417 | c_path_expr_of_child, |
72330bd6 AC |
418 | c_value_of_root, |
419 | c_value_of_child, | |
420 | c_type_of_child, | |
72330bd6 | 421 | c_value_of_variable} |
8b93c638 JM |
422 | , |
423 | /* C++ */ | |
424 | { | |
72330bd6 AC |
425 | vlang_cplus, |
426 | cplus_number_of_children, | |
427 | cplus_name_of_variable, | |
428 | cplus_name_of_child, | |
02142340 | 429 | cplus_path_expr_of_child, |
72330bd6 AC |
430 | cplus_value_of_root, |
431 | cplus_value_of_child, | |
432 | cplus_type_of_child, | |
72330bd6 | 433 | cplus_value_of_variable} |
8b93c638 JM |
434 | , |
435 | /* Java */ | |
436 | { | |
72330bd6 AC |
437 | vlang_java, |
438 | java_number_of_children, | |
439 | java_name_of_variable, | |
440 | java_name_of_child, | |
02142340 | 441 | java_path_expr_of_child, |
72330bd6 AC |
442 | java_value_of_root, |
443 | java_value_of_child, | |
444 | java_type_of_child, | |
72330bd6 | 445 | java_value_of_variable} |
8b93c638 JM |
446 | }; |
447 | ||
448 | /* A little convenience enum for dealing with C++/Java */ | |
449 | enum vsections | |
72330bd6 AC |
450 | { |
451 | v_public = 0, v_private, v_protected | |
452 | }; | |
8b93c638 JM |
453 | |
454 | /* Private data */ | |
455 | ||
456 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 457 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
458 | |
459 | /* Header of the list of root variable objects */ | |
460 | static struct varobj_root *rootlist; | |
8b93c638 JM |
461 | |
462 | /* Prime number indicating the number of buckets in the hash table */ | |
463 | /* A prime large enough to avoid too many colisions */ | |
464 | #define VAROBJ_TABLE_SIZE 227 | |
465 | ||
466 | /* Pointer to the varobj hash table (built at run time) */ | |
467 | static struct vlist **varobj_table; | |
468 | ||
8b93c638 JM |
469 | /* Is the variable X one of our "fake" children? */ |
470 | #define CPLUS_FAKE_CHILD(x) \ | |
471 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
472 | \f | |
473 | ||
474 | /* API Implementation */ | |
b2c2bd75 VP |
475 | static int |
476 | is_root_p (struct varobj *var) | |
477 | { | |
478 | return (var->root->rootvar == var); | |
479 | } | |
8b93c638 | 480 | |
d452c4bc UW |
481 | #ifdef HAVE_PYTHON |
482 | /* Helper function to install a Python environment suitable for | |
483 | use during operations on VAR. */ | |
484 | struct cleanup * | |
485 | varobj_ensure_python_env (struct varobj *var) | |
486 | { | |
487 | return ensure_python_env (var->root->exp->gdbarch, | |
488 | var->root->exp->language_defn); | |
489 | } | |
490 | #endif | |
491 | ||
8b93c638 JM |
492 | /* Creates a varobj (not its children) */ |
493 | ||
7d8547c9 AC |
494 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
495 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
496 | ||
497 | static struct frame_info * | |
498 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
499 | { | |
500 | struct frame_info *frame = NULL; | |
501 | ||
502 | if (frame_addr == (CORE_ADDR) 0) | |
503 | return NULL; | |
504 | ||
9d49bdc2 PA |
505 | for (frame = get_current_frame (); |
506 | frame != NULL; | |
507 | frame = get_prev_frame (frame)) | |
7d8547c9 | 508 | { |
1fac167a UW |
509 | /* The CORE_ADDR we get as argument was parsed from a string GDB |
510 | output as $fp. This output got truncated to gdbarch_addr_bit. | |
511 | Truncate the frame base address in the same manner before | |
512 | comparing it against our argument. */ | |
513 | CORE_ADDR frame_base = get_frame_base_address (frame); | |
514 | int addr_bit = gdbarch_addr_bit (get_frame_arch (frame)); | |
a109c7c1 | 515 | |
1fac167a UW |
516 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
517 | frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
518 | ||
519 | if (frame_base == frame_addr) | |
7d8547c9 AC |
520 | return frame; |
521 | } | |
9d49bdc2 PA |
522 | |
523 | return NULL; | |
7d8547c9 AC |
524 | } |
525 | ||
8b93c638 JM |
526 | struct varobj * |
527 | varobj_create (char *objname, | |
72330bd6 | 528 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
529 | { |
530 | struct varobj *var; | |
8b93c638 JM |
531 | struct cleanup *old_chain; |
532 | ||
533 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
534 | var = new_root_variable (); | |
74b7792f | 535 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
536 | |
537 | if (expression != NULL) | |
538 | { | |
e4195b40 JK |
539 | struct frame_info *fi; |
540 | struct frame_info *old_fi = NULL; | |
541 | struct block *block; | |
8b93c638 JM |
542 | char *p; |
543 | enum varobj_languages lang; | |
e55dccf0 | 544 | struct value *value = NULL; |
8b93c638 | 545 | |
9d49bdc2 PA |
546 | /* Parse and evaluate the expression, filling in as much of the |
547 | variable's data as possible. */ | |
548 | ||
549 | if (has_stack_frames ()) | |
550 | { | |
551 | /* Allow creator to specify context of variable */ | |
552 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) | |
553 | fi = get_selected_frame (NULL); | |
554 | else | |
555 | /* FIXME: cagney/2002-11-23: This code should be doing a | |
556 | lookup using the frame ID and not just the frame's | |
557 | ``address''. This, of course, means an interface | |
558 | change. However, with out that interface change ISAs, | |
559 | such as the ia64 with its two stacks, won't work. | |
560 | Similar goes for the case where there is a frameless | |
561 | function. */ | |
562 | fi = find_frame_addr_in_frame_chain (frame); | |
563 | } | |
8b93c638 | 564 | else |
9d49bdc2 | 565 | fi = NULL; |
8b93c638 | 566 | |
73a93a32 JI |
567 | /* frame = -2 means always use selected frame */ |
568 | if (type == USE_SELECTED_FRAME) | |
a5defcdc | 569 | var->root->floating = 1; |
73a93a32 | 570 | |
8b93c638 JM |
571 | block = NULL; |
572 | if (fi != NULL) | |
ae767bfb | 573 | block = get_frame_block (fi, 0); |
8b93c638 JM |
574 | |
575 | p = expression; | |
576 | innermost_block = NULL; | |
73a93a32 JI |
577 | /* Wrap the call to parse expression, so we can |
578 | return a sensible error. */ | |
579 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
580 | { | |
581 | return NULL; | |
582 | } | |
8b93c638 JM |
583 | |
584 | /* Don't allow variables to be created for types. */ | |
585 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
586 | { | |
587 | do_cleanups (old_chain); | |
bc8332bb AC |
588 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
589 | " as an expression.\n"); | |
8b93c638 JM |
590 | return NULL; |
591 | } | |
592 | ||
593 | var->format = variable_default_display (var); | |
594 | var->root->valid_block = innermost_block; | |
1b36a34b | 595 | var->name = xstrdup (expression); |
02142340 | 596 | /* For a root var, the name and the expr are the same. */ |
1b36a34b | 597 | var->path_expr = xstrdup (expression); |
8b93c638 JM |
598 | |
599 | /* When the frame is different from the current frame, | |
600 | we must select the appropriate frame before parsing | |
601 | the expression, otherwise the value will not be current. | |
602 | Since select_frame is so benign, just call it for all cases. */ | |
4e22772d | 603 | if (innermost_block) |
8b93c638 | 604 | { |
4e22772d JK |
605 | /* User could specify explicit FRAME-ADDR which was not found but |
606 | EXPRESSION is frame specific and we would not be able to evaluate | |
607 | it correctly next time. With VALID_BLOCK set we must also set | |
608 | FRAME and THREAD_ID. */ | |
609 | if (fi == NULL) | |
610 | error (_("Failed to find the specified frame")); | |
611 | ||
7a424e99 | 612 | var->root->frame = get_frame_id (fi); |
c5b48eac | 613 | var->root->thread_id = pid_to_thread_id (inferior_ptid); |
206415a3 | 614 | old_fi = get_selected_frame (NULL); |
c5b48eac | 615 | select_frame (fi); |
8b93c638 JM |
616 | } |
617 | ||
340a7723 | 618 | /* We definitely need to catch errors here. |
8b93c638 JM |
619 | If evaluate_expression succeeds we got the value we wanted. |
620 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb | 621 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
e55dccf0 VP |
622 | { |
623 | /* Error getting the value. Try to at least get the | |
624 | right type. */ | |
625 | struct value *type_only_value = evaluate_type (var->root->exp); | |
a109c7c1 | 626 | |
e55dccf0 VP |
627 | var->type = value_type (type_only_value); |
628 | } | |
629 | else | |
630 | var->type = value_type (value); | |
acd65feb | 631 | |
acd65feb | 632 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
633 | |
634 | /* Set language info */ | |
635 | lang = variable_language (var); | |
d5d6fca5 | 636 | var->root->lang = &languages[lang]; |
8b93c638 JM |
637 | |
638 | /* Set ourselves as our root */ | |
639 | var->root->rootvar = var; | |
640 | ||
641 | /* Reset the selected frame */ | |
e21458b2 | 642 | if (old_fi != NULL) |
0f7d239c | 643 | select_frame (old_fi); |
8b93c638 JM |
644 | } |
645 | ||
73a93a32 JI |
646 | /* If the variable object name is null, that means this |
647 | is a temporary variable, so don't install it. */ | |
648 | ||
649 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 | 650 | { |
1b36a34b | 651 | var->obj_name = xstrdup (objname); |
8b93c638 JM |
652 | |
653 | /* If a varobj name is duplicated, the install will fail so | |
654 | we must clenup */ | |
655 | if (!install_variable (var)) | |
656 | { | |
657 | do_cleanups (old_chain); | |
658 | return NULL; | |
659 | } | |
660 | } | |
661 | ||
662 | discard_cleanups (old_chain); | |
663 | return var; | |
664 | } | |
665 | ||
666 | /* Generates an unique name that can be used for a varobj */ | |
667 | ||
668 | char * | |
669 | varobj_gen_name (void) | |
670 | { | |
671 | static int id = 0; | |
e64d9b3d | 672 | char *obj_name; |
8b93c638 JM |
673 | |
674 | /* generate a name for this object */ | |
675 | id++; | |
b435e160 | 676 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 677 | |
e64d9b3d | 678 | return obj_name; |
8b93c638 JM |
679 | } |
680 | ||
61d8f275 JK |
681 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
682 | error if OBJNAME cannot be found. */ | |
8b93c638 JM |
683 | |
684 | struct varobj * | |
685 | varobj_get_handle (char *objname) | |
686 | { | |
687 | struct vlist *cv; | |
688 | const char *chp; | |
689 | unsigned int index = 0; | |
690 | unsigned int i = 1; | |
691 | ||
692 | for (chp = objname; *chp; chp++) | |
693 | { | |
694 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
695 | } | |
696 | ||
697 | cv = *(varobj_table + index); | |
698 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
699 | cv = cv->next; | |
700 | ||
701 | if (cv == NULL) | |
8a3fe4f8 | 702 | error (_("Variable object not found")); |
8b93c638 JM |
703 | |
704 | return cv->var; | |
705 | } | |
706 | ||
707 | /* Given the handle, return the name of the object */ | |
708 | ||
709 | char * | |
710 | varobj_get_objname (struct varobj *var) | |
711 | { | |
712 | return var->obj_name; | |
713 | } | |
714 | ||
715 | /* Given the handle, return the expression represented by the object */ | |
716 | ||
717 | char * | |
718 | varobj_get_expression (struct varobj *var) | |
719 | { | |
720 | return name_of_variable (var); | |
721 | } | |
722 | ||
723 | /* Deletes a varobj and all its children if only_children == 0, | |
724 | otherwise deletes only the children; returns a malloc'ed list of all the | |
725 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
726 | ||
727 | int | |
728 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
729 | { | |
730 | int delcount; | |
731 | int mycount; | |
732 | struct cpstack *result = NULL; | |
733 | char **cp; | |
734 | ||
735 | /* Initialize a stack for temporary results */ | |
736 | cppush (&result, NULL); | |
737 | ||
738 | if (only_children) | |
739 | /* Delete only the variable children */ | |
740 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
741 | else | |
742 | /* Delete the variable and all its children */ | |
743 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
744 | ||
745 | /* We may have been asked to return a list of what has been deleted */ | |
746 | if (dellist != NULL) | |
747 | { | |
748 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
749 | ||
750 | cp = *dellist; | |
751 | mycount = delcount; | |
752 | *cp = cppop (&result); | |
753 | while ((*cp != NULL) && (mycount > 0)) | |
754 | { | |
755 | mycount--; | |
756 | cp++; | |
757 | *cp = cppop (&result); | |
758 | } | |
759 | ||
760 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 761 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 762 | mycount); |
8b93c638 JM |
763 | } |
764 | ||
765 | return delcount; | |
766 | } | |
767 | ||
d8b65138 JK |
768 | #if HAVE_PYTHON |
769 | ||
b6313243 TT |
770 | /* Convenience function for varobj_set_visualizer. Instantiate a |
771 | pretty-printer for a given value. */ | |
772 | static PyObject * | |
773 | instantiate_pretty_printer (PyObject *constructor, struct value *value) | |
774 | { | |
b6313243 TT |
775 | PyObject *val_obj = NULL; |
776 | PyObject *printer; | |
b6313243 | 777 | |
b6313243 | 778 | val_obj = value_to_value_object (value); |
b6313243 TT |
779 | if (! val_obj) |
780 | return NULL; | |
781 | ||
782 | printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL); | |
783 | Py_DECREF (val_obj); | |
784 | return printer; | |
b6313243 TT |
785 | return NULL; |
786 | } | |
787 | ||
d8b65138 JK |
788 | #endif |
789 | ||
8b93c638 JM |
790 | /* Set/Get variable object display format */ |
791 | ||
792 | enum varobj_display_formats | |
793 | varobj_set_display_format (struct varobj *var, | |
794 | enum varobj_display_formats format) | |
795 | { | |
796 | switch (format) | |
797 | { | |
798 | case FORMAT_NATURAL: | |
799 | case FORMAT_BINARY: | |
800 | case FORMAT_DECIMAL: | |
801 | case FORMAT_HEXADECIMAL: | |
802 | case FORMAT_OCTAL: | |
803 | var->format = format; | |
804 | break; | |
805 | ||
806 | default: | |
807 | var->format = variable_default_display (var); | |
808 | } | |
809 | ||
ae7d22a6 VP |
810 | if (varobj_value_is_changeable_p (var) |
811 | && var->value && !value_lazy (var->value)) | |
812 | { | |
6c761d9c | 813 | xfree (var->print_value); |
d452c4bc | 814 | var->print_value = value_get_print_value (var->value, var->format, var); |
ae7d22a6 VP |
815 | } |
816 | ||
8b93c638 JM |
817 | return var->format; |
818 | } | |
819 | ||
820 | enum varobj_display_formats | |
821 | varobj_get_display_format (struct varobj *var) | |
822 | { | |
823 | return var->format; | |
824 | } | |
825 | ||
b6313243 TT |
826 | char * |
827 | varobj_get_display_hint (struct varobj *var) | |
828 | { | |
829 | char *result = NULL; | |
830 | ||
831 | #if HAVE_PYTHON | |
d452c4bc UW |
832 | struct cleanup *back_to = varobj_ensure_python_env (var); |
833 | ||
b6313243 TT |
834 | if (var->pretty_printer) |
835 | result = gdbpy_get_display_hint (var->pretty_printer); | |
d452c4bc UW |
836 | |
837 | do_cleanups (back_to); | |
b6313243 TT |
838 | #endif |
839 | ||
840 | return result; | |
841 | } | |
842 | ||
0cc7d26f TT |
843 | /* Return true if the varobj has items after TO, false otherwise. */ |
844 | ||
845 | int | |
846 | varobj_has_more (struct varobj *var, int to) | |
847 | { | |
848 | if (VEC_length (varobj_p, var->children) > to) | |
849 | return 1; | |
850 | return ((to == -1 || VEC_length (varobj_p, var->children) == to) | |
851 | && var->saved_item != NULL); | |
852 | } | |
853 | ||
c5b48eac VP |
854 | /* If the variable object is bound to a specific thread, that |
855 | is its evaluation can always be done in context of a frame | |
856 | inside that thread, returns GDB id of the thread -- which | |
857 | is always positive. Otherwise, returns -1. */ | |
858 | int | |
859 | varobj_get_thread_id (struct varobj *var) | |
860 | { | |
861 | if (var->root->valid_block && var->root->thread_id > 0) | |
862 | return var->root->thread_id; | |
863 | else | |
864 | return -1; | |
865 | } | |
866 | ||
25d5ea92 VP |
867 | void |
868 | varobj_set_frozen (struct varobj *var, int frozen) | |
869 | { | |
870 | /* When a variable is unfrozen, we don't fetch its value. | |
871 | The 'not_fetched' flag remains set, so next -var-update | |
872 | won't complain. | |
873 | ||
874 | We don't fetch the value, because for structures the client | |
875 | should do -var-update anyway. It would be bad to have different | |
876 | client-size logic for structure and other types. */ | |
877 | var->frozen = frozen; | |
878 | } | |
879 | ||
880 | int | |
881 | varobj_get_frozen (struct varobj *var) | |
882 | { | |
883 | return var->frozen; | |
884 | } | |
885 | ||
0cc7d26f TT |
886 | /* A helper function that restricts a range to what is actually |
887 | available in a VEC. This follows the usual rules for the meaning | |
888 | of FROM and TO -- if either is negative, the entire range is | |
889 | used. */ | |
890 | ||
891 | static void | |
892 | restrict_range (VEC (varobj_p) *children, int *from, int *to) | |
893 | { | |
894 | if (*from < 0 || *to < 0) | |
895 | { | |
896 | *from = 0; | |
897 | *to = VEC_length (varobj_p, children); | |
898 | } | |
899 | else | |
900 | { | |
901 | if (*from > VEC_length (varobj_p, children)) | |
902 | *from = VEC_length (varobj_p, children); | |
903 | if (*to > VEC_length (varobj_p, children)) | |
904 | *to = VEC_length (varobj_p, children); | |
905 | if (*from > *to) | |
906 | *from = *to; | |
907 | } | |
908 | } | |
909 | ||
d8b65138 JK |
910 | #if HAVE_PYTHON |
911 | ||
0cc7d26f TT |
912 | /* A helper for update_dynamic_varobj_children that installs a new |
913 | child when needed. */ | |
914 | ||
915 | static void | |
916 | install_dynamic_child (struct varobj *var, | |
917 | VEC (varobj_p) **changed, | |
918 | VEC (varobj_p) **new, | |
919 | VEC (varobj_p) **unchanged, | |
920 | int *cchanged, | |
921 | int index, | |
922 | const char *name, | |
923 | struct value *value) | |
924 | { | |
925 | if (VEC_length (varobj_p, var->children) < index + 1) | |
926 | { | |
927 | /* There's no child yet. */ | |
928 | struct varobj *child = varobj_add_child (var, name, value); | |
a109c7c1 | 929 | |
0cc7d26f TT |
930 | if (new) |
931 | { | |
932 | VEC_safe_push (varobj_p, *new, child); | |
933 | *cchanged = 1; | |
934 | } | |
935 | } | |
936 | else | |
937 | { | |
938 | varobj_p existing = VEC_index (varobj_p, var->children, index); | |
a109c7c1 | 939 | |
0cc7d26f TT |
940 | if (install_new_value (existing, value, 0)) |
941 | { | |
942 | if (changed) | |
943 | VEC_safe_push (varobj_p, *changed, existing); | |
944 | } | |
945 | else if (unchanged) | |
946 | VEC_safe_push (varobj_p, *unchanged, existing); | |
947 | } | |
948 | } | |
949 | ||
0cc7d26f TT |
950 | static int |
951 | dynamic_varobj_has_child_method (struct varobj *var) | |
952 | { | |
953 | struct cleanup *back_to; | |
954 | PyObject *printer = var->pretty_printer; | |
955 | int result; | |
956 | ||
957 | back_to = varobj_ensure_python_env (var); | |
958 | result = PyObject_HasAttr (printer, gdbpy_children_cst); | |
959 | do_cleanups (back_to); | |
960 | return result; | |
961 | } | |
962 | ||
963 | #endif | |
964 | ||
b6313243 TT |
965 | static int |
966 | update_dynamic_varobj_children (struct varobj *var, | |
967 | VEC (varobj_p) **changed, | |
0cc7d26f TT |
968 | VEC (varobj_p) **new, |
969 | VEC (varobj_p) **unchanged, | |
970 | int *cchanged, | |
971 | int update_children, | |
972 | int from, | |
973 | int to) | |
b6313243 TT |
974 | { |
975 | #if HAVE_PYTHON | |
b6313243 TT |
976 | struct cleanup *back_to; |
977 | PyObject *children; | |
b6313243 | 978 | int i; |
b6313243 | 979 | PyObject *printer = var->pretty_printer; |
b6313243 | 980 | |
d452c4bc | 981 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
982 | |
983 | *cchanged = 0; | |
984 | if (!PyObject_HasAttr (printer, gdbpy_children_cst)) | |
985 | { | |
986 | do_cleanups (back_to); | |
987 | return 0; | |
988 | } | |
989 | ||
0cc7d26f | 990 | if (update_children || !var->child_iter) |
b6313243 | 991 | { |
0cc7d26f TT |
992 | children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst, |
993 | NULL); | |
b6313243 | 994 | |
0cc7d26f TT |
995 | if (!children) |
996 | { | |
997 | gdbpy_print_stack (); | |
998 | error (_("Null value returned for children")); | |
999 | } | |
b6313243 | 1000 | |
0cc7d26f | 1001 | make_cleanup_py_decref (children); |
b6313243 | 1002 | |
0cc7d26f TT |
1003 | if (!PyIter_Check (children)) |
1004 | error (_("Returned value is not iterable")); | |
1005 | ||
1006 | Py_XDECREF (var->child_iter); | |
1007 | var->child_iter = PyObject_GetIter (children); | |
1008 | if (!var->child_iter) | |
1009 | { | |
1010 | gdbpy_print_stack (); | |
1011 | error (_("Could not get children iterator")); | |
1012 | } | |
1013 | ||
1014 | Py_XDECREF (var->saved_item); | |
1015 | var->saved_item = NULL; | |
1016 | ||
1017 | i = 0; | |
b6313243 | 1018 | } |
0cc7d26f TT |
1019 | else |
1020 | i = VEC_length (varobj_p, var->children); | |
b6313243 | 1021 | |
0cc7d26f TT |
1022 | /* We ask for one extra child, so that MI can report whether there |
1023 | are more children. */ | |
1024 | for (; to < 0 || i < to + 1; ++i) | |
b6313243 | 1025 | { |
0cc7d26f | 1026 | PyObject *item; |
b6313243 | 1027 | |
0cc7d26f TT |
1028 | /* See if there was a leftover from last time. */ |
1029 | if (var->saved_item) | |
1030 | { | |
1031 | item = var->saved_item; | |
1032 | var->saved_item = NULL; | |
1033 | } | |
1034 | else | |
1035 | item = PyIter_Next (var->child_iter); | |
b6313243 | 1036 | |
0cc7d26f TT |
1037 | if (!item) |
1038 | break; | |
b6313243 | 1039 | |
0cc7d26f TT |
1040 | /* We don't want to push the extra child on any report list. */ |
1041 | if (to < 0 || i < to) | |
b6313243 | 1042 | { |
0cc7d26f TT |
1043 | PyObject *py_v; |
1044 | char *name; | |
1045 | struct value *v; | |
1046 | struct cleanup *inner; | |
1047 | int can_mention = from < 0 || i >= from; | |
1048 | ||
1049 | inner = make_cleanup_py_decref (item); | |
1050 | ||
1051 | if (!PyArg_ParseTuple (item, "sO", &name, &py_v)) | |
1052 | error (_("Invalid item from the child list")); | |
1053 | ||
1054 | v = convert_value_from_python (py_v); | |
1055 | install_dynamic_child (var, can_mention ? changed : NULL, | |
1056 | can_mention ? new : NULL, | |
1057 | can_mention ? unchanged : NULL, | |
1058 | can_mention ? cchanged : NULL, i, name, v); | |
1059 | do_cleanups (inner); | |
b6313243 | 1060 | } |
0cc7d26f | 1061 | else |
b6313243 | 1062 | { |
0cc7d26f TT |
1063 | Py_XDECREF (var->saved_item); |
1064 | var->saved_item = item; | |
b6313243 | 1065 | |
0cc7d26f TT |
1066 | /* We want to truncate the child list just before this |
1067 | element. */ | |
1068 | break; | |
1069 | } | |
b6313243 TT |
1070 | } |
1071 | ||
1072 | if (i < VEC_length (varobj_p, var->children)) | |
1073 | { | |
0cc7d26f | 1074 | int j; |
a109c7c1 | 1075 | |
0cc7d26f TT |
1076 | *cchanged = 1; |
1077 | for (j = i; j < VEC_length (varobj_p, var->children); ++j) | |
1078 | varobj_delete (VEC_index (varobj_p, var->children, j), NULL, 0); | |
1079 | VEC_truncate (varobj_p, var->children, i); | |
b6313243 | 1080 | } |
0cc7d26f TT |
1081 | |
1082 | /* If there are fewer children than requested, note that the list of | |
1083 | children changed. */ | |
1084 | if (to >= 0 && VEC_length (varobj_p, var->children) < to) | |
1085 | *cchanged = 1; | |
1086 | ||
b6313243 TT |
1087 | var->num_children = VEC_length (varobj_p, var->children); |
1088 | ||
1089 | do_cleanups (back_to); | |
1090 | ||
b6313243 TT |
1091 | return 1; |
1092 | #else | |
1093 | gdb_assert (0 && "should never be called if Python is not enabled"); | |
1094 | #endif | |
1095 | } | |
25d5ea92 | 1096 | |
8b93c638 JM |
1097 | int |
1098 | varobj_get_num_children (struct varobj *var) | |
1099 | { | |
1100 | if (var->num_children == -1) | |
b6313243 | 1101 | { |
0cc7d26f TT |
1102 | if (var->pretty_printer) |
1103 | { | |
1104 | int dummy; | |
1105 | ||
1106 | /* If we have a dynamic varobj, don't report -1 children. | |
1107 | So, try to fetch some children first. */ | |
1108 | update_dynamic_varobj_children (var, NULL, NULL, NULL, &dummy, | |
1109 | 0, 0, 0); | |
1110 | } | |
1111 | else | |
b6313243 TT |
1112 | var->num_children = number_of_children (var); |
1113 | } | |
8b93c638 | 1114 | |
0cc7d26f | 1115 | return var->num_children >= 0 ? var->num_children : 0; |
8b93c638 JM |
1116 | } |
1117 | ||
1118 | /* Creates a list of the immediate children of a variable object; | |
1119 | the return code is the number of such children or -1 on error */ | |
1120 | ||
d56d46f5 | 1121 | VEC (varobj_p)* |
0cc7d26f | 1122 | varobj_list_children (struct varobj *var, int *from, int *to) |
8b93c638 | 1123 | { |
8b93c638 | 1124 | char *name; |
b6313243 TT |
1125 | int i, children_changed; |
1126 | ||
1127 | var->children_requested = 1; | |
1128 | ||
0cc7d26f TT |
1129 | if (var->pretty_printer) |
1130 | { | |
b6313243 TT |
1131 | /* This, in theory, can result in the number of children changing without |
1132 | frontend noticing. But well, calling -var-list-children on the same | |
1133 | varobj twice is not something a sane frontend would do. */ | |
0cc7d26f TT |
1134 | update_dynamic_varobj_children (var, NULL, NULL, NULL, &children_changed, |
1135 | 0, 0, *to); | |
1136 | restrict_range (var->children, from, to); | |
1137 | return var->children; | |
1138 | } | |
8b93c638 | 1139 | |
8b93c638 JM |
1140 | if (var->num_children == -1) |
1141 | var->num_children = number_of_children (var); | |
1142 | ||
74a44383 DJ |
1143 | /* If that failed, give up. */ |
1144 | if (var->num_children == -1) | |
d56d46f5 | 1145 | return var->children; |
74a44383 | 1146 | |
28335dcc VP |
1147 | /* If we're called when the list of children is not yet initialized, |
1148 | allocate enough elements in it. */ | |
1149 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
1150 | VEC_safe_push (varobj_p, var->children, NULL); | |
1151 | ||
8b93c638 JM |
1152 | for (i = 0; i < var->num_children; i++) |
1153 | { | |
d56d46f5 | 1154 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
1155 | |
1156 | if (existing == NULL) | |
1157 | { | |
1158 | /* Either it's the first call to varobj_list_children for | |
1159 | this variable object, and the child was never created, | |
1160 | or it was explicitly deleted by the client. */ | |
1161 | name = name_of_child (var, i); | |
1162 | existing = create_child (var, i, name); | |
1163 | VEC_replace (varobj_p, var->children, i, existing); | |
1164 | } | |
8b93c638 JM |
1165 | } |
1166 | ||
0cc7d26f | 1167 | restrict_range (var->children, from, to); |
d56d46f5 | 1168 | return var->children; |
8b93c638 JM |
1169 | } |
1170 | ||
d8b65138 JK |
1171 | #if HAVE_PYTHON |
1172 | ||
b6313243 TT |
1173 | static struct varobj * |
1174 | varobj_add_child (struct varobj *var, const char *name, struct value *value) | |
1175 | { | |
1176 | varobj_p v = create_child_with_value (var, | |
1177 | VEC_length (varobj_p, var->children), | |
1178 | name, value); | |
a109c7c1 | 1179 | |
b6313243 | 1180 | VEC_safe_push (varobj_p, var->children, v); |
b6313243 TT |
1181 | return v; |
1182 | } | |
1183 | ||
d8b65138 JK |
1184 | #endif /* HAVE_PYTHON */ |
1185 | ||
8b93c638 JM |
1186 | /* Obtain the type of an object Variable as a string similar to the one gdb |
1187 | prints on the console */ | |
1188 | ||
1189 | char * | |
1190 | varobj_get_type (struct varobj *var) | |
1191 | { | |
8b93c638 | 1192 | /* For the "fake" variables, do not return a type. (It's type is |
8756216b DP |
1193 | NULL, too.) |
1194 | Do not return a type for invalid variables as well. */ | |
1195 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
1196 | return NULL; |
1197 | ||
1a4300e9 | 1198 | return type_to_string (var->type); |
8b93c638 JM |
1199 | } |
1200 | ||
1ecb4ee0 DJ |
1201 | /* Obtain the type of an object variable. */ |
1202 | ||
1203 | struct type * | |
1204 | varobj_get_gdb_type (struct varobj *var) | |
1205 | { | |
1206 | return var->type; | |
1207 | } | |
1208 | ||
02142340 VP |
1209 | /* Return a pointer to the full rooted expression of varobj VAR. |
1210 | If it has not been computed yet, compute it. */ | |
1211 | char * | |
1212 | varobj_get_path_expr (struct varobj *var) | |
1213 | { | |
1214 | if (var->path_expr != NULL) | |
1215 | return var->path_expr; | |
1216 | else | |
1217 | { | |
1218 | /* For root varobjs, we initialize path_expr | |
1219 | when creating varobj, so here it should be | |
1220 | child varobj. */ | |
1221 | gdb_assert (!is_root_p (var)); | |
1222 | return (*var->root->lang->path_expr_of_child) (var); | |
1223 | } | |
1224 | } | |
1225 | ||
8b93c638 JM |
1226 | enum varobj_languages |
1227 | varobj_get_language (struct varobj *var) | |
1228 | { | |
1229 | return variable_language (var); | |
1230 | } | |
1231 | ||
1232 | int | |
1233 | varobj_get_attributes (struct varobj *var) | |
1234 | { | |
1235 | int attributes = 0; | |
1236 | ||
340a7723 | 1237 | if (varobj_editable_p (var)) |
8b93c638 JM |
1238 | /* FIXME: define masks for attributes */ |
1239 | attributes |= 0x00000001; /* Editable */ | |
1240 | ||
1241 | return attributes; | |
1242 | } | |
1243 | ||
0cc7d26f TT |
1244 | int |
1245 | varobj_pretty_printed_p (struct varobj *var) | |
1246 | { | |
1247 | return var->pretty_printer != NULL; | |
1248 | } | |
1249 | ||
de051565 MK |
1250 | char * |
1251 | varobj_get_formatted_value (struct varobj *var, | |
1252 | enum varobj_display_formats format) | |
1253 | { | |
1254 | return my_value_of_variable (var, format); | |
1255 | } | |
1256 | ||
8b93c638 JM |
1257 | char * |
1258 | varobj_get_value (struct varobj *var) | |
1259 | { | |
de051565 | 1260 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
1261 | } |
1262 | ||
1263 | /* Set the value of an object variable (if it is editable) to the | |
1264 | value of the given expression */ | |
1265 | /* Note: Invokes functions that can call error() */ | |
1266 | ||
1267 | int | |
1268 | varobj_set_value (struct varobj *var, char *expression) | |
1269 | { | |
30b28db1 | 1270 | struct value *val; |
8b93c638 JM |
1271 | |
1272 | /* The argument "expression" contains the variable's new value. | |
1273 | We need to first construct a legal expression for this -- ugh! */ | |
1274 | /* Does this cover all the bases? */ | |
1275 | struct expression *exp; | |
30b28db1 | 1276 | struct value *value; |
8b93c638 | 1277 | int saved_input_radix = input_radix; |
340a7723 | 1278 | char *s = expression; |
8b93c638 | 1279 | |
340a7723 | 1280 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 1281 | |
340a7723 NR |
1282 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ |
1283 | exp = parse_exp_1 (&s, 0, 0); | |
1284 | if (!gdb_evaluate_expression (exp, &value)) | |
1285 | { | |
1286 | /* We cannot proceed without a valid expression. */ | |
1287 | xfree (exp); | |
1288 | return 0; | |
8b93c638 JM |
1289 | } |
1290 | ||
340a7723 NR |
1291 | /* All types that are editable must also be changeable. */ |
1292 | gdb_assert (varobj_value_is_changeable_p (var)); | |
1293 | ||
1294 | /* The value of a changeable variable object must not be lazy. */ | |
1295 | gdb_assert (!value_lazy (var->value)); | |
1296 | ||
1297 | /* Need to coerce the input. We want to check if the | |
1298 | value of the variable object will be different | |
1299 | after assignment, and the first thing value_assign | |
1300 | does is coerce the input. | |
1301 | For example, if we are assigning an array to a pointer variable we | |
1302 | should compare the pointer with the the array's address, not with the | |
1303 | array's content. */ | |
1304 | value = coerce_array (value); | |
1305 | ||
1306 | /* The new value may be lazy. gdb_value_assign, or | |
1307 | rather value_contents, will take care of this. | |
1308 | If fetching of the new value will fail, gdb_value_assign | |
1309 | with catch the exception. */ | |
1310 | if (!gdb_value_assign (var->value, value, &val)) | |
1311 | return 0; | |
1312 | ||
1313 | /* If the value has changed, record it, so that next -var-update can | |
1314 | report this change. If a variable had a value of '1', we've set it | |
1315 | to '333' and then set again to '1', when -var-update will report this | |
1316 | variable as changed -- because the first assignment has set the | |
1317 | 'updated' flag. There's no need to optimize that, because return value | |
1318 | of -var-update should be considered an approximation. */ | |
1319 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
1320 | input_radix = saved_input_radix; | |
1321 | return 1; | |
8b93c638 JM |
1322 | } |
1323 | ||
0cc7d26f TT |
1324 | #if HAVE_PYTHON |
1325 | ||
1326 | /* A helper function to install a constructor function and visualizer | |
1327 | in a varobj. */ | |
1328 | ||
1329 | static void | |
1330 | install_visualizer (struct varobj *var, PyObject *constructor, | |
1331 | PyObject *visualizer) | |
1332 | { | |
1333 | Py_XDECREF (var->constructor); | |
1334 | var->constructor = constructor; | |
1335 | ||
1336 | Py_XDECREF (var->pretty_printer); | |
1337 | var->pretty_printer = visualizer; | |
1338 | ||
1339 | Py_XDECREF (var->child_iter); | |
1340 | var->child_iter = NULL; | |
1341 | } | |
1342 | ||
1343 | /* Install the default visualizer for VAR. */ | |
1344 | ||
1345 | static void | |
1346 | install_default_visualizer (struct varobj *var) | |
1347 | { | |
1348 | if (pretty_printing) | |
1349 | { | |
1350 | PyObject *pretty_printer = NULL; | |
1351 | ||
1352 | if (var->value) | |
1353 | { | |
1354 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value); | |
1355 | if (! pretty_printer) | |
1356 | { | |
1357 | gdbpy_print_stack (); | |
1358 | error (_("Cannot instantiate printer for default visualizer")); | |
1359 | } | |
1360 | } | |
1361 | ||
1362 | if (pretty_printer == Py_None) | |
1363 | { | |
1364 | Py_DECREF (pretty_printer); | |
1365 | pretty_printer = NULL; | |
1366 | } | |
1367 | ||
1368 | install_visualizer (var, NULL, pretty_printer); | |
1369 | } | |
1370 | } | |
1371 | ||
1372 | /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to | |
1373 | make a new object. */ | |
1374 | ||
1375 | static void | |
1376 | construct_visualizer (struct varobj *var, PyObject *constructor) | |
1377 | { | |
1378 | PyObject *pretty_printer; | |
1379 | ||
1380 | Py_INCREF (constructor); | |
1381 | if (constructor == Py_None) | |
1382 | pretty_printer = NULL; | |
1383 | else | |
1384 | { | |
1385 | pretty_printer = instantiate_pretty_printer (constructor, var->value); | |
1386 | if (! pretty_printer) | |
1387 | { | |
1388 | gdbpy_print_stack (); | |
1389 | Py_DECREF (constructor); | |
1390 | constructor = Py_None; | |
1391 | Py_INCREF (constructor); | |
1392 | } | |
1393 | ||
1394 | if (pretty_printer == Py_None) | |
1395 | { | |
1396 | Py_DECREF (pretty_printer); | |
1397 | pretty_printer = NULL; | |
1398 | } | |
1399 | } | |
1400 | ||
1401 | install_visualizer (var, constructor, pretty_printer); | |
1402 | } | |
1403 | ||
1404 | #endif /* HAVE_PYTHON */ | |
1405 | ||
1406 | /* A helper function for install_new_value. This creates and installs | |
1407 | a visualizer for VAR, if appropriate. */ | |
1408 | ||
1409 | static void | |
1410 | install_new_value_visualizer (struct varobj *var) | |
1411 | { | |
1412 | #if HAVE_PYTHON | |
1413 | /* If the constructor is None, then we want the raw value. If VAR | |
1414 | does not have a value, just skip this. */ | |
1415 | if (var->constructor != Py_None && var->value) | |
1416 | { | |
1417 | struct cleanup *cleanup; | |
0cc7d26f TT |
1418 | |
1419 | cleanup = varobj_ensure_python_env (var); | |
1420 | ||
1421 | if (!var->constructor) | |
1422 | install_default_visualizer (var); | |
1423 | else | |
1424 | construct_visualizer (var, var->constructor); | |
1425 | ||
1426 | do_cleanups (cleanup); | |
1427 | } | |
1428 | #else | |
1429 | /* Do nothing. */ | |
1430 | #endif | |
1431 | } | |
1432 | ||
acd65feb VP |
1433 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
1434 | this is the first assignement after the variable object was just | |
1435 | created, or changed type. In that case, just assign the value | |
1436 | and return 0. | |
ee342b23 VP |
1437 | Otherwise, assign the new value, and return 1 if the value is different |
1438 | from the current one, 0 otherwise. The comparison is done on textual | |
1439 | representation of value. Therefore, some types need not be compared. E.g. | |
1440 | for structures the reported value is always "{...}", so no comparison is | |
1441 | necessary here. If the old value was NULL and new one is not, or vice versa, | |
1442 | we always return 1. | |
b26ed50d VP |
1443 | |
1444 | The VALUE parameter should not be released -- the function will | |
1445 | take care of releasing it when needed. */ | |
acd65feb VP |
1446 | static int |
1447 | install_new_value (struct varobj *var, struct value *value, int initial) | |
1448 | { | |
1449 | int changeable; | |
1450 | int need_to_fetch; | |
1451 | int changed = 0; | |
25d5ea92 | 1452 | int intentionally_not_fetched = 0; |
7a4d50bf | 1453 | char *print_value = NULL; |
acd65feb | 1454 | |
acd65feb VP |
1455 | /* We need to know the varobj's type to decide if the value should |
1456 | be fetched or not. C++ fake children (public/protected/private) don't have | |
1457 | a type. */ | |
1458 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 1459 | changeable = varobj_value_is_changeable_p (var); |
b6313243 TT |
1460 | |
1461 | /* If the type has custom visualizer, we consider it to be always | |
1462 | changeable. FIXME: need to make sure this behaviour will not | |
1463 | mess up read-sensitive values. */ | |
1464 | if (var->pretty_printer) | |
1465 | changeable = 1; | |
1466 | ||
acd65feb VP |
1467 | need_to_fetch = changeable; |
1468 | ||
b26ed50d VP |
1469 | /* We are not interested in the address of references, and given |
1470 | that in C++ a reference is not rebindable, it cannot | |
1471 | meaningfully change. So, get hold of the real value. */ | |
1472 | if (value) | |
0cc7d26f | 1473 | value = coerce_ref (value); |
b26ed50d | 1474 | |
acd65feb VP |
1475 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1476 | /* For unions, we need to fetch the value implicitly because | |
1477 | of implementation of union member fetch. When gdb | |
1478 | creates a value for a field and the value of the enclosing | |
1479 | structure is not lazy, it immediately copies the necessary | |
1480 | bytes from the enclosing values. If the enclosing value is | |
1481 | lazy, the call to value_fetch_lazy on the field will read | |
1482 | the data from memory. For unions, that means we'll read the | |
1483 | same memory more than once, which is not desirable. So | |
1484 | fetch now. */ | |
1485 | need_to_fetch = 1; | |
1486 | ||
1487 | /* The new value might be lazy. If the type is changeable, | |
1488 | that is we'll be comparing values of this type, fetch the | |
1489 | value now. Otherwise, on the next update the old value | |
1490 | will be lazy, which means we've lost that old value. */ | |
1491 | if (need_to_fetch && value && value_lazy (value)) | |
1492 | { | |
25d5ea92 VP |
1493 | struct varobj *parent = var->parent; |
1494 | int frozen = var->frozen; | |
a109c7c1 | 1495 | |
25d5ea92 VP |
1496 | for (; !frozen && parent; parent = parent->parent) |
1497 | frozen |= parent->frozen; | |
1498 | ||
1499 | if (frozen && initial) | |
1500 | { | |
1501 | /* For variables that are frozen, or are children of frozen | |
1502 | variables, we don't do fetch on initial assignment. | |
1503 | For non-initial assignemnt we do the fetch, since it means we're | |
1504 | explicitly asked to compare the new value with the old one. */ | |
1505 | intentionally_not_fetched = 1; | |
1506 | } | |
1507 | else if (!gdb_value_fetch_lazy (value)) | |
acd65feb | 1508 | { |
acd65feb VP |
1509 | /* Set the value to NULL, so that for the next -var-update, |
1510 | we don't try to compare the new value with this value, | |
1511 | that we couldn't even read. */ | |
1512 | value = NULL; | |
1513 | } | |
acd65feb VP |
1514 | } |
1515 | ||
b6313243 | 1516 | |
7a4d50bf VP |
1517 | /* Below, we'll be comparing string rendering of old and new |
1518 | values. Don't get string rendering if the value is | |
1519 | lazy -- if it is, the code above has decided that the value | |
1520 | should not be fetched. */ | |
0cc7d26f | 1521 | if (value && !value_lazy (value) && !var->pretty_printer) |
d452c4bc | 1522 | print_value = value_get_print_value (value, var->format, var); |
7a4d50bf | 1523 | |
acd65feb VP |
1524 | /* If the type is changeable, compare the old and the new values. |
1525 | If this is the initial assignment, we don't have any old value | |
1526 | to compare with. */ | |
7a4d50bf | 1527 | if (!initial && changeable) |
acd65feb VP |
1528 | { |
1529 | /* If the value of the varobj was changed by -var-set-value, then the | |
1530 | value in the varobj and in the target is the same. However, that value | |
1531 | is different from the value that the varobj had after the previous | |
57e66780 | 1532 | -var-update. So need to the varobj as changed. */ |
acd65feb | 1533 | if (var->updated) |
57e66780 | 1534 | { |
57e66780 DJ |
1535 | changed = 1; |
1536 | } | |
0cc7d26f | 1537 | else if (! var->pretty_printer) |
acd65feb VP |
1538 | { |
1539 | /* Try to compare the values. That requires that both | |
1540 | values are non-lazy. */ | |
25d5ea92 VP |
1541 | if (var->not_fetched && value_lazy (var->value)) |
1542 | { | |
1543 | /* This is a frozen varobj and the value was never read. | |
1544 | Presumably, UI shows some "never read" indicator. | |
1545 | Now that we've fetched the real value, we need to report | |
1546 | this varobj as changed so that UI can show the real | |
1547 | value. */ | |
1548 | changed = 1; | |
1549 | } | |
1550 | else if (var->value == NULL && value == NULL) | |
acd65feb VP |
1551 | /* Equal. */ |
1552 | ; | |
1553 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1554 | { |
57e66780 DJ |
1555 | changed = 1; |
1556 | } | |
acd65feb VP |
1557 | else |
1558 | { | |
1559 | gdb_assert (!value_lazy (var->value)); | |
1560 | gdb_assert (!value_lazy (value)); | |
85265413 | 1561 | |
57e66780 | 1562 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1563 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1564 | changed = 1; |
acd65feb VP |
1565 | } |
1566 | } | |
1567 | } | |
85265413 | 1568 | |
ee342b23 VP |
1569 | if (!initial && !changeable) |
1570 | { | |
1571 | /* For values that are not changeable, we don't compare the values. | |
1572 | However, we want to notice if a value was not NULL and now is NULL, | |
1573 | or vise versa, so that we report when top-level varobjs come in scope | |
1574 | and leave the scope. */ | |
1575 | changed = (var->value != NULL) != (value != NULL); | |
1576 | } | |
1577 | ||
acd65feb | 1578 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1579 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1580 | value_free (var->value); |
1581 | var->value = value; | |
0cc7d26f TT |
1582 | if (value != NULL) |
1583 | value_incref (value); | |
25d5ea92 VP |
1584 | if (value && value_lazy (value) && intentionally_not_fetched) |
1585 | var->not_fetched = 1; | |
1586 | else | |
1587 | var->not_fetched = 0; | |
acd65feb | 1588 | var->updated = 0; |
85265413 | 1589 | |
0cc7d26f TT |
1590 | install_new_value_visualizer (var); |
1591 | ||
1592 | /* If we installed a pretty-printer, re-compare the printed version | |
1593 | to see if the variable changed. */ | |
1594 | if (var->pretty_printer) | |
1595 | { | |
1596 | xfree (print_value); | |
1597 | print_value = value_get_print_value (var->value, var->format, var); | |
e8f781e2 TT |
1598 | if ((var->print_value == NULL && print_value != NULL) |
1599 | || (var->print_value != NULL && print_value == NULL) | |
1600 | || (var->print_value != NULL && print_value != NULL | |
1601 | && strcmp (var->print_value, print_value) != 0)) | |
0cc7d26f TT |
1602 | changed = 1; |
1603 | } | |
1604 | if (var->print_value) | |
1605 | xfree (var->print_value); | |
1606 | var->print_value = print_value; | |
1607 | ||
b26ed50d | 1608 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1609 | |
1610 | return changed; | |
1611 | } | |
acd65feb | 1612 | |
0cc7d26f TT |
1613 | /* Return the requested range for a varobj. VAR is the varobj. FROM |
1614 | and TO are out parameters; *FROM and *TO will be set to the | |
1615 | selected sub-range of VAR. If no range was selected using | |
1616 | -var-set-update-range, then both will be -1. */ | |
1617 | void | |
1618 | varobj_get_child_range (struct varobj *var, int *from, int *to) | |
b6313243 | 1619 | { |
0cc7d26f TT |
1620 | *from = var->from; |
1621 | *to = var->to; | |
b6313243 TT |
1622 | } |
1623 | ||
0cc7d26f TT |
1624 | /* Set the selected sub-range of children of VAR to start at index |
1625 | FROM and end at index TO. If either FROM or TO is less than zero, | |
1626 | this is interpreted as a request for all children. */ | |
1627 | void | |
1628 | varobj_set_child_range (struct varobj *var, int from, int to) | |
b6313243 | 1629 | { |
0cc7d26f TT |
1630 | var->from = from; |
1631 | var->to = to; | |
b6313243 TT |
1632 | } |
1633 | ||
1634 | void | |
1635 | varobj_set_visualizer (struct varobj *var, const char *visualizer) | |
1636 | { | |
1637 | #if HAVE_PYTHON | |
34fa1d9d MS |
1638 | PyObject *mainmod, *globals, *constructor; |
1639 | struct cleanup *back_to; | |
b6313243 | 1640 | |
d452c4bc | 1641 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
1642 | |
1643 | mainmod = PyImport_AddModule ("__main__"); | |
1644 | globals = PyModule_GetDict (mainmod); | |
1645 | Py_INCREF (globals); | |
1646 | make_cleanup_py_decref (globals); | |
1647 | ||
1648 | constructor = PyRun_String (visualizer, Py_eval_input, globals, globals); | |
b6313243 | 1649 | |
0cc7d26f | 1650 | if (! constructor) |
b6313243 TT |
1651 | { |
1652 | gdbpy_print_stack (); | |
da1f2771 | 1653 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
b6313243 TT |
1654 | } |
1655 | ||
0cc7d26f TT |
1656 | construct_visualizer (var, constructor); |
1657 | Py_XDECREF (constructor); | |
b6313243 | 1658 | |
0cc7d26f TT |
1659 | /* If there are any children now, wipe them. */ |
1660 | varobj_delete (var, NULL, 1 /* children only */); | |
1661 | var->num_children = -1; | |
b6313243 TT |
1662 | |
1663 | do_cleanups (back_to); | |
1664 | #else | |
da1f2771 | 1665 | error (_("Python support required")); |
b6313243 TT |
1666 | #endif |
1667 | } | |
1668 | ||
8b93c638 JM |
1669 | /* Update the values for a variable and its children. This is a |
1670 | two-pronged attack. First, re-parse the value for the root's | |
1671 | expression to see if it's changed. Then go all the way | |
1672 | through its children, reconstructing them and noting if they've | |
1673 | changed. | |
1674 | ||
25d5ea92 VP |
1675 | The EXPLICIT parameter specifies if this call is result |
1676 | of MI request to update this specific variable, or | |
1677 | result of implicit -var-update *. For implicit request, we don't | |
1678 | update frozen variables. | |
705da579 KS |
1679 | |
1680 | NOTE: This function may delete the caller's varobj. If it | |
8756216b DP |
1681 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1682 | to point to the new varobj. */ | |
8b93c638 | 1683 | |
f7f9ae2c | 1684 | VEC(varobj_update_result) *varobj_update (struct varobj **varp, int explicit) |
8b93c638 JM |
1685 | { |
1686 | int changed = 0; | |
25d5ea92 | 1687 | int type_changed = 0; |
8b93c638 | 1688 | int i; |
30b28db1 | 1689 | struct value *new; |
b6313243 | 1690 | VEC (varobj_update_result) *stack = NULL; |
f7f9ae2c | 1691 | VEC (varobj_update_result) *result = NULL; |
8b93c638 | 1692 | |
25d5ea92 VP |
1693 | /* Frozen means frozen -- we don't check for any change in |
1694 | this varobj, including its going out of scope, or | |
1695 | changing type. One use case for frozen varobjs is | |
1696 | retaining previously evaluated expressions, and we don't | |
1697 | want them to be reevaluated at all. */ | |
1698 | if (!explicit && (*varp)->frozen) | |
f7f9ae2c | 1699 | return result; |
8756216b DP |
1700 | |
1701 | if (!(*varp)->root->is_valid) | |
f7f9ae2c | 1702 | { |
cfce2ea2 | 1703 | varobj_update_result r = {0}; |
a109c7c1 | 1704 | |
cfce2ea2 | 1705 | r.varobj = *varp; |
f7f9ae2c VP |
1706 | r.status = VAROBJ_INVALID; |
1707 | VEC_safe_push (varobj_update_result, result, &r); | |
1708 | return result; | |
1709 | } | |
8b93c638 | 1710 | |
25d5ea92 | 1711 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1712 | { |
cfce2ea2 | 1713 | varobj_update_result r = {0}; |
a109c7c1 | 1714 | |
cfce2ea2 | 1715 | r.varobj = *varp; |
f7f9ae2c VP |
1716 | r.status = VAROBJ_IN_SCOPE; |
1717 | ||
25d5ea92 VP |
1718 | /* Update the root variable. value_of_root can return NULL |
1719 | if the variable is no longer around, i.e. we stepped out of | |
1720 | the frame in which a local existed. We are letting the | |
1721 | value_of_root variable dispose of the varobj if the type | |
1722 | has changed. */ | |
25d5ea92 | 1723 | new = value_of_root (varp, &type_changed); |
f7f9ae2c VP |
1724 | r.varobj = *varp; |
1725 | ||
1726 | r.type_changed = type_changed; | |
ea56f9c2 | 1727 | if (install_new_value ((*varp), new, type_changed)) |
f7f9ae2c | 1728 | r.changed = 1; |
ea56f9c2 | 1729 | |
25d5ea92 | 1730 | if (new == NULL) |
f7f9ae2c | 1731 | r.status = VAROBJ_NOT_IN_SCOPE; |
b6313243 | 1732 | r.value_installed = 1; |
f7f9ae2c VP |
1733 | |
1734 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
b6313243 | 1735 | { |
0b4bc29a JK |
1736 | if (r.type_changed || r.changed) |
1737 | VEC_safe_push (varobj_update_result, result, &r); | |
b6313243 TT |
1738 | return result; |
1739 | } | |
1740 | ||
1741 | VEC_safe_push (varobj_update_result, stack, &r); | |
1742 | } | |
1743 | else | |
1744 | { | |
cfce2ea2 | 1745 | varobj_update_result r = {0}; |
a109c7c1 | 1746 | |
cfce2ea2 | 1747 | r.varobj = *varp; |
b6313243 | 1748 | VEC_safe_push (varobj_update_result, stack, &r); |
b20d8971 | 1749 | } |
8b93c638 | 1750 | |
8756216b | 1751 | /* Walk through the children, reconstructing them all. */ |
b6313243 | 1752 | while (!VEC_empty (varobj_update_result, stack)) |
8b93c638 | 1753 | { |
b6313243 TT |
1754 | varobj_update_result r = *(VEC_last (varobj_update_result, stack)); |
1755 | struct varobj *v = r.varobj; | |
1756 | ||
1757 | VEC_pop (varobj_update_result, stack); | |
1758 | ||
1759 | /* Update this variable, unless it's a root, which is already | |
1760 | updated. */ | |
1761 | if (!r.value_installed) | |
1762 | { | |
1763 | new = value_of_child (v->parent, v->index); | |
1764 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1765 | { | |
1766 | r.changed = 1; | |
1767 | v->updated = 0; | |
1768 | } | |
1769 | } | |
1770 | ||
1771 | /* We probably should not get children of a varobj that has a | |
1772 | pretty-printer, but for which -var-list-children was never | |
0cc7d26f | 1773 | invoked. */ |
b6313243 TT |
1774 | if (v->pretty_printer) |
1775 | { | |
0cc7d26f | 1776 | VEC (varobj_p) *changed = 0, *new = 0, *unchanged = 0; |
26f9bcee | 1777 | int i, children_changed = 0; |
b6313243 TT |
1778 | |
1779 | if (v->frozen) | |
1780 | continue; | |
1781 | ||
0cc7d26f TT |
1782 | if (!v->children_requested) |
1783 | { | |
1784 | int dummy; | |
1785 | ||
1786 | /* If we initially did not have potential children, but | |
1787 | now we do, consider the varobj as changed. | |
1788 | Otherwise, if children were never requested, consider | |
1789 | it as unchanged -- presumably, such varobj is not yet | |
1790 | expanded in the UI, so we need not bother getting | |
1791 | it. */ | |
1792 | if (!varobj_has_more (v, 0)) | |
1793 | { | |
1794 | update_dynamic_varobj_children (v, NULL, NULL, NULL, | |
1795 | &dummy, 0, 0, 0); | |
1796 | if (varobj_has_more (v, 0)) | |
1797 | r.changed = 1; | |
1798 | } | |
1799 | ||
1800 | if (r.changed) | |
1801 | VEC_safe_push (varobj_update_result, result, &r); | |
1802 | ||
1803 | continue; | |
1804 | } | |
1805 | ||
b6313243 TT |
1806 | /* If update_dynamic_varobj_children returns 0, then we have |
1807 | a non-conforming pretty-printer, so we skip it. */ | |
0cc7d26f TT |
1808 | if (update_dynamic_varobj_children (v, &changed, &new, &unchanged, |
1809 | &children_changed, 1, | |
1810 | v->from, v->to)) | |
b6313243 | 1811 | { |
0cc7d26f | 1812 | if (children_changed || new) |
b6313243 | 1813 | { |
0cc7d26f TT |
1814 | r.children_changed = 1; |
1815 | r.new = new; | |
b6313243 | 1816 | } |
0cc7d26f TT |
1817 | /* Push in reverse order so that the first child is |
1818 | popped from the work stack first, and so will be | |
1819 | added to result first. This does not affect | |
1820 | correctness, just "nicer". */ | |
1821 | for (i = VEC_length (varobj_p, changed) - 1; i >= 0; --i) | |
b6313243 | 1822 | { |
0cc7d26f | 1823 | varobj_p tmp = VEC_index (varobj_p, changed, i); |
cfce2ea2 | 1824 | varobj_update_result r = {0}; |
a109c7c1 | 1825 | |
cfce2ea2 | 1826 | r.varobj = tmp; |
0cc7d26f | 1827 | r.changed = 1; |
b6313243 TT |
1828 | r.value_installed = 1; |
1829 | VEC_safe_push (varobj_update_result, stack, &r); | |
1830 | } | |
0cc7d26f TT |
1831 | for (i = VEC_length (varobj_p, unchanged) - 1; i >= 0; --i) |
1832 | { | |
1833 | varobj_p tmp = VEC_index (varobj_p, unchanged, i); | |
a109c7c1 | 1834 | |
0cc7d26f TT |
1835 | if (!tmp->frozen) |
1836 | { | |
cfce2ea2 | 1837 | varobj_update_result r = {0}; |
a109c7c1 | 1838 | |
cfce2ea2 | 1839 | r.varobj = tmp; |
0cc7d26f TT |
1840 | r.value_installed = 1; |
1841 | VEC_safe_push (varobj_update_result, stack, &r); | |
1842 | } | |
1843 | } | |
b6313243 TT |
1844 | if (r.changed || r.children_changed) |
1845 | VEC_safe_push (varobj_update_result, result, &r); | |
0cc7d26f TT |
1846 | |
1847 | /* Free CHANGED and UNCHANGED, but not NEW, because NEW | |
1848 | has been put into the result vector. */ | |
1849 | VEC_free (varobj_p, changed); | |
1850 | VEC_free (varobj_p, unchanged); | |
1851 | ||
b6313243 TT |
1852 | continue; |
1853 | } | |
1854 | } | |
28335dcc VP |
1855 | |
1856 | /* Push any children. Use reverse order so that the first | |
1857 | child is popped from the work stack first, and so | |
1858 | will be added to result first. This does not | |
1859 | affect correctness, just "nicer". */ | |
1860 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1861 | { |
28335dcc | 1862 | varobj_p c = VEC_index (varobj_p, v->children, i); |
a109c7c1 | 1863 | |
28335dcc | 1864 | /* Child may be NULL if explicitly deleted by -var-delete. */ |
25d5ea92 | 1865 | if (c != NULL && !c->frozen) |
28335dcc | 1866 | { |
cfce2ea2 | 1867 | varobj_update_result r = {0}; |
a109c7c1 | 1868 | |
cfce2ea2 | 1869 | r.varobj = c; |
b6313243 | 1870 | VEC_safe_push (varobj_update_result, stack, &r); |
28335dcc | 1871 | } |
8b93c638 | 1872 | } |
b6313243 TT |
1873 | |
1874 | if (r.changed || r.type_changed) | |
1875 | VEC_safe_push (varobj_update_result, result, &r); | |
8b93c638 JM |
1876 | } |
1877 | ||
b6313243 TT |
1878 | VEC_free (varobj_update_result, stack); |
1879 | ||
f7f9ae2c | 1880 | return result; |
8b93c638 JM |
1881 | } |
1882 | \f | |
1883 | ||
1884 | /* Helper functions */ | |
1885 | ||
1886 | /* | |
1887 | * Variable object construction/destruction | |
1888 | */ | |
1889 | ||
1890 | static int | |
fba45db2 KB |
1891 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1892 | int only_children_p) | |
8b93c638 JM |
1893 | { |
1894 | int delcount = 0; | |
1895 | ||
1896 | delete_variable_1 (resultp, &delcount, var, | |
1897 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1898 | ||
1899 | return delcount; | |
1900 | } | |
1901 | ||
1902 | /* Delete the variable object VAR and its children */ | |
1903 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1904 | and the parent is not removed we dump core. It must be always | |
1905 | initially called with remove_from_parent_p set */ | |
1906 | static void | |
72330bd6 AC |
1907 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1908 | struct varobj *var, int only_children_p, | |
1909 | int remove_from_parent_p) | |
8b93c638 | 1910 | { |
28335dcc | 1911 | int i; |
8b93c638 JM |
1912 | |
1913 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1914 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1915 | { | |
1916 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
a109c7c1 | 1917 | |
214270ab VP |
1918 | if (!child) |
1919 | continue; | |
8b93c638 | 1920 | if (!remove_from_parent_p) |
28335dcc VP |
1921 | child->parent = NULL; |
1922 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1923 | } |
28335dcc | 1924 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1925 | |
1926 | /* if we were called to delete only the children we are done here */ | |
1927 | if (only_children_p) | |
1928 | return; | |
1929 | ||
1930 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1931 | /* If the name is null, this is a temporary variable, that has not |
1932 | yet been installed, don't report it, it belongs to the caller... */ | |
1933 | if (var->obj_name != NULL) | |
8b93c638 | 1934 | { |
5b616ba1 | 1935 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1936 | *delcountp = *delcountp + 1; |
1937 | } | |
1938 | ||
1939 | /* If this variable has a parent, remove it from its parent's list */ | |
1940 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1941 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1942 | expensive list search to find the element to remove when we are | |
1943 | discarding the list afterwards */ | |
72330bd6 | 1944 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1945 | { |
28335dcc | 1946 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1947 | } |
72330bd6 | 1948 | |
73a93a32 JI |
1949 | if (var->obj_name != NULL) |
1950 | uninstall_variable (var); | |
8b93c638 JM |
1951 | |
1952 | /* Free memory associated with this variable */ | |
1953 | free_variable (var); | |
1954 | } | |
1955 | ||
1956 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1957 | static int | |
fba45db2 | 1958 | install_variable (struct varobj *var) |
8b93c638 JM |
1959 | { |
1960 | struct vlist *cv; | |
1961 | struct vlist *newvl; | |
1962 | const char *chp; | |
1963 | unsigned int index = 0; | |
1964 | unsigned int i = 1; | |
1965 | ||
1966 | for (chp = var->obj_name; *chp; chp++) | |
1967 | { | |
1968 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1969 | } | |
1970 | ||
1971 | cv = *(varobj_table + index); | |
1972 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1973 | cv = cv->next; | |
1974 | ||
1975 | if (cv != NULL) | |
8a3fe4f8 | 1976 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1977 | |
1978 | /* Add varobj to hash table */ | |
1979 | newvl = xmalloc (sizeof (struct vlist)); | |
1980 | newvl->next = *(varobj_table + index); | |
1981 | newvl->var = var; | |
1982 | *(varobj_table + index) = newvl; | |
1983 | ||
1984 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1985 | if (is_root_p (var)) |
8b93c638 JM |
1986 | { |
1987 | /* Add to list of root variables */ | |
1988 | if (rootlist == NULL) | |
1989 | var->root->next = NULL; | |
1990 | else | |
1991 | var->root->next = rootlist; | |
1992 | rootlist = var->root; | |
8b93c638 JM |
1993 | } |
1994 | ||
1995 | return 1; /* OK */ | |
1996 | } | |
1997 | ||
1998 | /* Unistall the object VAR. */ | |
1999 | static void | |
fba45db2 | 2000 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
2001 | { |
2002 | struct vlist *cv; | |
2003 | struct vlist *prev; | |
2004 | struct varobj_root *cr; | |
2005 | struct varobj_root *prer; | |
2006 | const char *chp; | |
2007 | unsigned int index = 0; | |
2008 | unsigned int i = 1; | |
2009 | ||
2010 | /* Remove varobj from hash table */ | |
2011 | for (chp = var->obj_name; *chp; chp++) | |
2012 | { | |
2013 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
2014 | } | |
2015 | ||
2016 | cv = *(varobj_table + index); | |
2017 | prev = NULL; | |
2018 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
2019 | { | |
2020 | prev = cv; | |
2021 | cv = cv->next; | |
2022 | } | |
2023 | ||
2024 | if (varobjdebug) | |
2025 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
2026 | ||
2027 | if (cv == NULL) | |
2028 | { | |
72330bd6 AC |
2029 | warning |
2030 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
2031 | var->obj_name); | |
8b93c638 JM |
2032 | return; |
2033 | } | |
2034 | ||
2035 | if (prev == NULL) | |
2036 | *(varobj_table + index) = cv->next; | |
2037 | else | |
2038 | prev->next = cv->next; | |
2039 | ||
b8c9b27d | 2040 | xfree (cv); |
8b93c638 JM |
2041 | |
2042 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 2043 | if (is_root_p (var)) |
8b93c638 JM |
2044 | { |
2045 | /* Remove from list of root variables */ | |
2046 | if (rootlist == var->root) | |
2047 | rootlist = var->root->next; | |
2048 | else | |
2049 | { | |
2050 | prer = NULL; | |
2051 | cr = rootlist; | |
2052 | while ((cr != NULL) && (cr->rootvar != var)) | |
2053 | { | |
2054 | prer = cr; | |
2055 | cr = cr->next; | |
2056 | } | |
2057 | if (cr == NULL) | |
2058 | { | |
72330bd6 AC |
2059 | warning |
2060 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
2061 | var->obj_name); | |
8b93c638 JM |
2062 | return; |
2063 | } | |
2064 | if (prer == NULL) | |
2065 | rootlist = NULL; | |
2066 | else | |
2067 | prer->next = cr->next; | |
2068 | } | |
8b93c638 JM |
2069 | } |
2070 | ||
2071 | } | |
2072 | ||
8b93c638 JM |
2073 | /* Create and install a child of the parent of the given name */ |
2074 | static struct varobj * | |
fba45db2 | 2075 | create_child (struct varobj *parent, int index, char *name) |
b6313243 TT |
2076 | { |
2077 | return create_child_with_value (parent, index, name, | |
2078 | value_of_child (parent, index)); | |
2079 | } | |
2080 | ||
2081 | static struct varobj * | |
2082 | create_child_with_value (struct varobj *parent, int index, const char *name, | |
2083 | struct value *value) | |
8b93c638 JM |
2084 | { |
2085 | struct varobj *child; | |
2086 | char *childs_name; | |
2087 | ||
2088 | child = new_variable (); | |
2089 | ||
2090 | /* name is allocated by name_of_child */ | |
b6313243 TT |
2091 | /* FIXME: xstrdup should not be here. */ |
2092 | child->name = xstrdup (name); | |
8b93c638 | 2093 | child->index = index; |
8b93c638 JM |
2094 | child->parent = parent; |
2095 | child->root = parent->root; | |
b435e160 | 2096 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
2097 | child->obj_name = childs_name; |
2098 | install_variable (child); | |
2099 | ||
acd65feb VP |
2100 | /* Compute the type of the child. Must do this before |
2101 | calling install_new_value. */ | |
2102 | if (value != NULL) | |
2103 | /* If the child had no evaluation errors, var->value | |
2104 | will be non-NULL and contain a valid type. */ | |
2105 | child->type = value_type (value); | |
2106 | else | |
2107 | /* Otherwise, we must compute the type. */ | |
2108 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
2109 | child->index); | |
2110 | install_new_value (child, value, 1); | |
2111 | ||
8b93c638 JM |
2112 | return child; |
2113 | } | |
8b93c638 JM |
2114 | \f |
2115 | ||
2116 | /* | |
2117 | * Miscellaneous utility functions. | |
2118 | */ | |
2119 | ||
2120 | /* Allocate memory and initialize a new variable */ | |
2121 | static struct varobj * | |
2122 | new_variable (void) | |
2123 | { | |
2124 | struct varobj *var; | |
2125 | ||
2126 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
2127 | var->name = NULL; | |
02142340 | 2128 | var->path_expr = NULL; |
8b93c638 JM |
2129 | var->obj_name = NULL; |
2130 | var->index = -1; | |
2131 | var->type = NULL; | |
2132 | var->value = NULL; | |
8b93c638 JM |
2133 | var->num_children = -1; |
2134 | var->parent = NULL; | |
2135 | var->children = NULL; | |
2136 | var->format = 0; | |
2137 | var->root = NULL; | |
fb9b6b35 | 2138 | var->updated = 0; |
85265413 | 2139 | var->print_value = NULL; |
25d5ea92 VP |
2140 | var->frozen = 0; |
2141 | var->not_fetched = 0; | |
b6313243 | 2142 | var->children_requested = 0; |
0cc7d26f TT |
2143 | var->from = -1; |
2144 | var->to = -1; | |
2145 | var->constructor = 0; | |
b6313243 | 2146 | var->pretty_printer = 0; |
0cc7d26f TT |
2147 | var->child_iter = 0; |
2148 | var->saved_item = 0; | |
8b93c638 JM |
2149 | |
2150 | return var; | |
2151 | } | |
2152 | ||
2153 | /* Allocate memory and initialize a new root variable */ | |
2154 | static struct varobj * | |
2155 | new_root_variable (void) | |
2156 | { | |
2157 | struct varobj *var = new_variable (); | |
a109c7c1 | 2158 | |
8b93c638 JM |
2159 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; |
2160 | var->root->lang = NULL; | |
2161 | var->root->exp = NULL; | |
2162 | var->root->valid_block = NULL; | |
7a424e99 | 2163 | var->root->frame = null_frame_id; |
a5defcdc | 2164 | var->root->floating = 0; |
8b93c638 | 2165 | var->root->rootvar = NULL; |
8756216b | 2166 | var->root->is_valid = 1; |
8b93c638 JM |
2167 | |
2168 | return var; | |
2169 | } | |
2170 | ||
2171 | /* Free any allocated memory associated with VAR. */ | |
2172 | static void | |
fba45db2 | 2173 | free_variable (struct varobj *var) |
8b93c638 | 2174 | { |
d452c4bc UW |
2175 | #if HAVE_PYTHON |
2176 | if (var->pretty_printer) | |
2177 | { | |
2178 | struct cleanup *cleanup = varobj_ensure_python_env (var); | |
0cc7d26f TT |
2179 | Py_XDECREF (var->constructor); |
2180 | Py_XDECREF (var->pretty_printer); | |
2181 | Py_XDECREF (var->child_iter); | |
2182 | Py_XDECREF (var->saved_item); | |
d452c4bc UW |
2183 | do_cleanups (cleanup); |
2184 | } | |
2185 | #endif | |
2186 | ||
36746093 JK |
2187 | value_free (var->value); |
2188 | ||
8b93c638 | 2189 | /* Free the expression if this is a root variable. */ |
b2c2bd75 | 2190 | if (is_root_p (var)) |
8b93c638 | 2191 | { |
3038237c | 2192 | xfree (var->root->exp); |
8038e1e2 | 2193 | xfree (var->root); |
8b93c638 JM |
2194 | } |
2195 | ||
8038e1e2 AC |
2196 | xfree (var->name); |
2197 | xfree (var->obj_name); | |
85265413 | 2198 | xfree (var->print_value); |
02142340 | 2199 | xfree (var->path_expr); |
8038e1e2 | 2200 | xfree (var); |
8b93c638 JM |
2201 | } |
2202 | ||
74b7792f AC |
2203 | static void |
2204 | do_free_variable_cleanup (void *var) | |
2205 | { | |
2206 | free_variable (var); | |
2207 | } | |
2208 | ||
2209 | static struct cleanup * | |
2210 | make_cleanup_free_variable (struct varobj *var) | |
2211 | { | |
2212 | return make_cleanup (do_free_variable_cleanup, var); | |
2213 | } | |
2214 | ||
6766a268 DJ |
2215 | /* This returns the type of the variable. It also skips past typedefs |
2216 | to return the real type of the variable. | |
94b66fa7 KS |
2217 | |
2218 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
2219 | except within get_target_type and get_type. */ | |
8b93c638 | 2220 | static struct type * |
fba45db2 | 2221 | get_type (struct varobj *var) |
8b93c638 JM |
2222 | { |
2223 | struct type *type; | |
8b93c638 | 2224 | |
a109c7c1 | 2225 | type = var->type; |
6766a268 DJ |
2226 | if (type != NULL) |
2227 | type = check_typedef (type); | |
8b93c638 JM |
2228 | |
2229 | return type; | |
2230 | } | |
2231 | ||
6e2a9270 VP |
2232 | /* Return the type of the value that's stored in VAR, |
2233 | or that would have being stored there if the | |
2234 | value were accessible. | |
2235 | ||
2236 | This differs from VAR->type in that VAR->type is always | |
2237 | the true type of the expession in the source language. | |
2238 | The return value of this function is the type we're | |
2239 | actually storing in varobj, and using for displaying | |
2240 | the values and for comparing previous and new values. | |
2241 | ||
2242 | For example, top-level references are always stripped. */ | |
2243 | static struct type * | |
2244 | get_value_type (struct varobj *var) | |
2245 | { | |
2246 | struct type *type; | |
2247 | ||
2248 | if (var->value) | |
2249 | type = value_type (var->value); | |
2250 | else | |
2251 | type = var->type; | |
2252 | ||
2253 | type = check_typedef (type); | |
2254 | ||
2255 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
2256 | type = get_target_type (type); | |
2257 | ||
2258 | type = check_typedef (type); | |
2259 | ||
2260 | return type; | |
2261 | } | |
2262 | ||
8b93c638 | 2263 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
2264 | past typedefs, just like get_type (). |
2265 | ||
2266 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
2267 | except within get_target_type and get_type. */ | |
8b93c638 | 2268 | static struct type * |
fba45db2 | 2269 | get_target_type (struct type *type) |
8b93c638 JM |
2270 | { |
2271 | if (type != NULL) | |
2272 | { | |
2273 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
2274 | if (type != NULL) |
2275 | type = check_typedef (type); | |
8b93c638 JM |
2276 | } |
2277 | ||
2278 | return type; | |
2279 | } | |
2280 | ||
2281 | /* What is the default display for this variable? We assume that | |
2282 | everything is "natural". Any exceptions? */ | |
2283 | static enum varobj_display_formats | |
fba45db2 | 2284 | variable_default_display (struct varobj *var) |
8b93c638 JM |
2285 | { |
2286 | return FORMAT_NATURAL; | |
2287 | } | |
2288 | ||
8b93c638 JM |
2289 | /* FIXME: The following should be generic for any pointer */ |
2290 | static void | |
fba45db2 | 2291 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
2292 | { |
2293 | struct cpstack *s; | |
2294 | ||
2295 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
2296 | s->name = name; | |
2297 | s->next = *pstack; | |
2298 | *pstack = s; | |
2299 | } | |
2300 | ||
2301 | /* FIXME: The following should be generic for any pointer */ | |
2302 | static char * | |
fba45db2 | 2303 | cppop (struct cpstack **pstack) |
8b93c638 JM |
2304 | { |
2305 | struct cpstack *s; | |
2306 | char *v; | |
2307 | ||
2308 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
2309 | return NULL; | |
2310 | ||
2311 | s = *pstack; | |
2312 | v = s->name; | |
2313 | *pstack = (*pstack)->next; | |
b8c9b27d | 2314 | xfree (s); |
8b93c638 JM |
2315 | |
2316 | return v; | |
2317 | } | |
2318 | \f | |
2319 | /* | |
2320 | * Language-dependencies | |
2321 | */ | |
2322 | ||
2323 | /* Common entry points */ | |
2324 | ||
2325 | /* Get the language of variable VAR. */ | |
2326 | static enum varobj_languages | |
fba45db2 | 2327 | variable_language (struct varobj *var) |
8b93c638 JM |
2328 | { |
2329 | enum varobj_languages lang; | |
2330 | ||
2331 | switch (var->root->exp->language_defn->la_language) | |
2332 | { | |
2333 | default: | |
2334 | case language_c: | |
2335 | lang = vlang_c; | |
2336 | break; | |
2337 | case language_cplus: | |
2338 | lang = vlang_cplus; | |
2339 | break; | |
2340 | case language_java: | |
2341 | lang = vlang_java; | |
2342 | break; | |
2343 | } | |
2344 | ||
2345 | return lang; | |
2346 | } | |
2347 | ||
2348 | /* Return the number of children for a given variable. | |
2349 | The result of this function is defined by the language | |
2350 | implementation. The number of children returned by this function | |
2351 | is the number of children that the user will see in the variable | |
2352 | display. */ | |
2353 | static int | |
fba45db2 | 2354 | number_of_children (struct varobj *var) |
8b93c638 JM |
2355 | { |
2356 | return (*var->root->lang->number_of_children) (var);; | |
2357 | } | |
2358 | ||
2359 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
2360 | static char * | |
fba45db2 | 2361 | name_of_variable (struct varobj *var) |
8b93c638 JM |
2362 | { |
2363 | return (*var->root->lang->name_of_variable) (var); | |
2364 | } | |
2365 | ||
2366 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
2367 | static char * | |
fba45db2 | 2368 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
2369 | { |
2370 | return (*var->root->lang->name_of_child) (var, index); | |
2371 | } | |
2372 | ||
a5defcdc VP |
2373 | /* What is the ``struct value *'' of the root variable VAR? |
2374 | For floating variable object, evaluation can get us a value | |
2375 | of different type from what is stored in varobj already. In | |
2376 | that case: | |
2377 | - *type_changed will be set to 1 | |
2378 | - old varobj will be freed, and new one will be | |
2379 | created, with the same name. | |
2380 | - *var_handle will be set to the new varobj | |
2381 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 2382 | static struct value * |
fba45db2 | 2383 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 2384 | { |
73a93a32 JI |
2385 | struct varobj *var; |
2386 | ||
2387 | if (var_handle == NULL) | |
2388 | return NULL; | |
2389 | ||
2390 | var = *var_handle; | |
2391 | ||
2392 | /* This should really be an exception, since this should | |
2393 | only get called with a root variable. */ | |
2394 | ||
b2c2bd75 | 2395 | if (!is_root_p (var)) |
73a93a32 JI |
2396 | return NULL; |
2397 | ||
a5defcdc | 2398 | if (var->root->floating) |
73a93a32 JI |
2399 | { |
2400 | struct varobj *tmp_var; | |
2401 | char *old_type, *new_type; | |
6225abfa | 2402 | |
73a93a32 JI |
2403 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
2404 | USE_SELECTED_FRAME); | |
2405 | if (tmp_var == NULL) | |
2406 | { | |
2407 | return NULL; | |
2408 | } | |
6225abfa | 2409 | old_type = varobj_get_type (var); |
73a93a32 | 2410 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 2411 | if (strcmp (old_type, new_type) == 0) |
73a93a32 | 2412 | { |
fcacd99f VP |
2413 | /* The expression presently stored inside var->root->exp |
2414 | remembers the locations of local variables relatively to | |
2415 | the frame where the expression was created (in DWARF location | |
2416 | button, for example). Naturally, those locations are not | |
2417 | correct in other frames, so update the expression. */ | |
2418 | ||
2419 | struct expression *tmp_exp = var->root->exp; | |
a109c7c1 | 2420 | |
fcacd99f VP |
2421 | var->root->exp = tmp_var->root->exp; |
2422 | tmp_var->root->exp = tmp_exp; | |
2423 | ||
73a93a32 JI |
2424 | varobj_delete (tmp_var, NULL, 0); |
2425 | *type_changed = 0; | |
2426 | } | |
2427 | else | |
2428 | { | |
1b36a34b | 2429 | tmp_var->obj_name = xstrdup (var->obj_name); |
0cc7d26f TT |
2430 | tmp_var->from = var->from; |
2431 | tmp_var->to = var->to; | |
a5defcdc VP |
2432 | varobj_delete (var, NULL, 0); |
2433 | ||
73a93a32 JI |
2434 | install_variable (tmp_var); |
2435 | *var_handle = tmp_var; | |
705da579 | 2436 | var = *var_handle; |
73a93a32 JI |
2437 | *type_changed = 1; |
2438 | } | |
74dddad3 MS |
2439 | xfree (old_type); |
2440 | xfree (new_type); | |
73a93a32 JI |
2441 | } |
2442 | else | |
2443 | { | |
2444 | *type_changed = 0; | |
2445 | } | |
2446 | ||
2447 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
2448 | } |
2449 | ||
30b28db1 AC |
2450 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
2451 | static struct value * | |
fba45db2 | 2452 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 2453 | { |
30b28db1 | 2454 | struct value *value; |
8b93c638 JM |
2455 | |
2456 | value = (*parent->root->lang->value_of_child) (parent, index); | |
2457 | ||
8b93c638 JM |
2458 | return value; |
2459 | } | |
2460 | ||
8b93c638 JM |
2461 | /* GDB already has a command called "value_of_variable". Sigh. */ |
2462 | static char * | |
de051565 | 2463 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2464 | { |
8756216b | 2465 | if (var->root->is_valid) |
0cc7d26f TT |
2466 | { |
2467 | if (var->pretty_printer) | |
2468 | return value_get_print_value (var->value, var->format, var); | |
2469 | return (*var->root->lang->value_of_variable) (var, format); | |
2470 | } | |
8756216b DP |
2471 | else |
2472 | return NULL; | |
8b93c638 JM |
2473 | } |
2474 | ||
85265413 | 2475 | static char * |
b6313243 | 2476 | value_get_print_value (struct value *value, enum varobj_display_formats format, |
d452c4bc | 2477 | struct varobj *var) |
85265413 | 2478 | { |
57e66780 DJ |
2479 | struct ui_file *stb; |
2480 | struct cleanup *old_chain; | |
fbb8f299 | 2481 | gdb_byte *thevalue = NULL; |
79a45b7d | 2482 | struct value_print_options opts; |
be759fcf PM |
2483 | struct type *type = NULL; |
2484 | long len = 0; | |
2485 | char *encoding = NULL; | |
2486 | struct gdbarch *gdbarch = NULL; | |
57e66780 DJ |
2487 | |
2488 | if (value == NULL) | |
2489 | return NULL; | |
2490 | ||
be759fcf | 2491 | gdbarch = get_type_arch (value_type (value)); |
b6313243 TT |
2492 | #if HAVE_PYTHON |
2493 | { | |
d452c4bc UW |
2494 | struct cleanup *back_to = varobj_ensure_python_env (var); |
2495 | PyObject *value_formatter = var->pretty_printer; | |
2496 | ||
0cc7d26f | 2497 | if (value_formatter) |
b6313243 | 2498 | { |
0cc7d26f TT |
2499 | /* First check to see if we have any children at all. If so, |
2500 | we simply return {...}. */ | |
2501 | if (dynamic_varobj_has_child_method (var)) | |
2502 | return xstrdup ("{...}"); | |
b6313243 | 2503 | |
0cc7d26f | 2504 | if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst)) |
b6313243 | 2505 | { |
0cc7d26f TT |
2506 | char *hint; |
2507 | struct value *replacement; | |
2508 | int string_print = 0; | |
2509 | PyObject *output = NULL; | |
2510 | ||
2511 | hint = gdbpy_get_display_hint (value_formatter); | |
2512 | if (hint) | |
2513 | { | |
2514 | if (!strcmp (hint, "string")) | |
2515 | string_print = 1; | |
2516 | xfree (hint); | |
2517 | } | |
b6313243 | 2518 | |
0cc7d26f TT |
2519 | output = apply_varobj_pretty_printer (value_formatter, |
2520 | &replacement); | |
2521 | if (output) | |
2522 | { | |
be759fcf | 2523 | if (gdbpy_is_lazy_string (output)) |
0cc7d26f | 2524 | { |
be759fcf PM |
2525 | thevalue = gdbpy_extract_lazy_string (output, &type, |
2526 | &len, &encoding); | |
2527 | string_print = 1; | |
2528 | } | |
2529 | else | |
2530 | { | |
2531 | PyObject *py_str | |
2532 | = python_string_to_target_python_string (output); | |
a109c7c1 | 2533 | |
be759fcf PM |
2534 | if (py_str) |
2535 | { | |
2536 | char *s = PyString_AsString (py_str); | |
a109c7c1 | 2537 | |
be759fcf PM |
2538 | len = PyString_Size (py_str); |
2539 | thevalue = xmemdup (s, len + 1, len + 1); | |
2540 | type = builtin_type (gdbarch)->builtin_char; | |
2541 | Py_DECREF (py_str); | |
2542 | } | |
0cc7d26f TT |
2543 | } |
2544 | Py_DECREF (output); | |
fbb8f299 | 2545 | } |
0cc7d26f TT |
2546 | if (thevalue && !string_print) |
2547 | { | |
2548 | do_cleanups (back_to); | |
be759fcf | 2549 | xfree (encoding); |
0cc7d26f TT |
2550 | return thevalue; |
2551 | } | |
2552 | if (replacement) | |
2553 | value = replacement; | |
b6313243 | 2554 | } |
b6313243 | 2555 | } |
d452c4bc | 2556 | do_cleanups (back_to); |
b6313243 TT |
2557 | } |
2558 | #endif | |
2559 | ||
57e66780 DJ |
2560 | stb = mem_fileopen (); |
2561 | old_chain = make_cleanup_ui_file_delete (stb); | |
2562 | ||
79a45b7d TT |
2563 | get_formatted_print_options (&opts, format_code[(int) format]); |
2564 | opts.deref_ref = 0; | |
b6313243 TT |
2565 | opts.raw = 1; |
2566 | if (thevalue) | |
2567 | { | |
2568 | make_cleanup (xfree, thevalue); | |
be759fcf PM |
2569 | make_cleanup (xfree, encoding); |
2570 | LA_PRINT_STRING (stb, type, thevalue, len, encoding, 0, &opts); | |
b6313243 TT |
2571 | } |
2572 | else | |
2573 | common_val_print (value, stb, 0, &opts, current_language); | |
759ef836 | 2574 | thevalue = ui_file_xstrdup (stb, NULL); |
57e66780 | 2575 | |
85265413 NR |
2576 | do_cleanups (old_chain); |
2577 | return thevalue; | |
2578 | } | |
2579 | ||
340a7723 NR |
2580 | int |
2581 | varobj_editable_p (struct varobj *var) | |
2582 | { | |
2583 | struct type *type; | |
340a7723 NR |
2584 | |
2585 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
2586 | return 0; | |
2587 | ||
2588 | type = get_value_type (var); | |
2589 | ||
2590 | switch (TYPE_CODE (type)) | |
2591 | { | |
2592 | case TYPE_CODE_STRUCT: | |
2593 | case TYPE_CODE_UNION: | |
2594 | case TYPE_CODE_ARRAY: | |
2595 | case TYPE_CODE_FUNC: | |
2596 | case TYPE_CODE_METHOD: | |
2597 | return 0; | |
2598 | break; | |
2599 | ||
2600 | default: | |
2601 | return 1; | |
2602 | break; | |
2603 | } | |
2604 | } | |
2605 | ||
acd65feb VP |
2606 | /* Return non-zero if changes in value of VAR |
2607 | must be detected and reported by -var-update. | |
2608 | Return zero is -var-update should never report | |
2609 | changes of such values. This makes sense for structures | |
2610 | (since the changes in children values will be reported separately), | |
2611 | or for artifical objects (like 'public' pseudo-field in C++). | |
2612 | ||
2613 | Return value of 0 means that gdb need not call value_fetch_lazy | |
2614 | for the value of this variable object. */ | |
8b93c638 | 2615 | static int |
b2c2bd75 | 2616 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
2617 | { |
2618 | int r; | |
2619 | struct type *type; | |
2620 | ||
2621 | if (CPLUS_FAKE_CHILD (var)) | |
2622 | return 0; | |
2623 | ||
6e2a9270 | 2624 | type = get_value_type (var); |
8b93c638 JM |
2625 | |
2626 | switch (TYPE_CODE (type)) | |
2627 | { | |
72330bd6 AC |
2628 | case TYPE_CODE_STRUCT: |
2629 | case TYPE_CODE_UNION: | |
2630 | case TYPE_CODE_ARRAY: | |
2631 | r = 0; | |
2632 | break; | |
8b93c638 | 2633 | |
72330bd6 AC |
2634 | default: |
2635 | r = 1; | |
8b93c638 JM |
2636 | } |
2637 | ||
2638 | return r; | |
2639 | } | |
2640 | ||
5a413362 VP |
2641 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
2642 | selected frame, and not bound to thread/frame. Such variable objects | |
2643 | are created using '@' as frame specifier to -var-create. */ | |
2644 | int | |
2645 | varobj_floating_p (struct varobj *var) | |
2646 | { | |
2647 | return var->root->floating; | |
2648 | } | |
2649 | ||
2024f65a VP |
2650 | /* Given the value and the type of a variable object, |
2651 | adjust the value and type to those necessary | |
2652 | for getting children of the variable object. | |
2653 | This includes dereferencing top-level references | |
2654 | to all types and dereferencing pointers to | |
2655 | structures. | |
2656 | ||
2657 | Both TYPE and *TYPE should be non-null. VALUE | |
2658 | can be null if we want to only translate type. | |
2659 | *VALUE can be null as well -- if the parent | |
02142340 VP |
2660 | value is not known. |
2661 | ||
2662 | If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1 | |
b6313243 | 2663 | depending on whether pointer was dereferenced |
02142340 | 2664 | in this function. */ |
2024f65a VP |
2665 | static void |
2666 | adjust_value_for_child_access (struct value **value, | |
02142340 VP |
2667 | struct type **type, |
2668 | int *was_ptr) | |
2024f65a VP |
2669 | { |
2670 | gdb_assert (type && *type); | |
2671 | ||
02142340 VP |
2672 | if (was_ptr) |
2673 | *was_ptr = 0; | |
2674 | ||
2024f65a VP |
2675 | *type = check_typedef (*type); |
2676 | ||
2677 | /* The type of value stored in varobj, that is passed | |
2678 | to us, is already supposed to be | |
2679 | reference-stripped. */ | |
2680 | ||
2681 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
2682 | ||
2683 | /* Pointers to structures are treated just like | |
2684 | structures when accessing children. Don't | |
2685 | dererences pointers to other types. */ | |
2686 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
2687 | { | |
2688 | struct type *target_type = get_target_type (*type); | |
2689 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
2690 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
2691 | { | |
2692 | if (value && *value) | |
3f4178d6 | 2693 | { |
a109c7c1 MS |
2694 | int success = gdb_value_ind (*value, value); |
2695 | ||
3f4178d6 DJ |
2696 | if (!success) |
2697 | *value = NULL; | |
2698 | } | |
2024f65a | 2699 | *type = target_type; |
02142340 VP |
2700 | if (was_ptr) |
2701 | *was_ptr = 1; | |
2024f65a VP |
2702 | } |
2703 | } | |
2704 | ||
2705 | /* The 'get_target_type' function calls check_typedef on | |
2706 | result, so we can immediately check type code. No | |
2707 | need to call check_typedef here. */ | |
2708 | } | |
2709 | ||
8b93c638 JM |
2710 | /* C */ |
2711 | static int | |
fba45db2 | 2712 | c_number_of_children (struct varobj *var) |
8b93c638 | 2713 | { |
2024f65a VP |
2714 | struct type *type = get_value_type (var); |
2715 | int children = 0; | |
8b93c638 | 2716 | struct type *target; |
8b93c638 | 2717 | |
02142340 | 2718 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 | 2719 | target = get_target_type (type); |
8b93c638 JM |
2720 | |
2721 | switch (TYPE_CODE (type)) | |
2722 | { | |
2723 | case TYPE_CODE_ARRAY: | |
2724 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
d78df370 | 2725 | && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
8b93c638 JM |
2726 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
2727 | else | |
74a44383 DJ |
2728 | /* If we don't know how many elements there are, don't display |
2729 | any. */ | |
2730 | children = 0; | |
8b93c638 JM |
2731 | break; |
2732 | ||
2733 | case TYPE_CODE_STRUCT: | |
2734 | case TYPE_CODE_UNION: | |
2735 | children = TYPE_NFIELDS (type); | |
2736 | break; | |
2737 | ||
2738 | case TYPE_CODE_PTR: | |
2024f65a VP |
2739 | /* The type here is a pointer to non-struct. Typically, pointers |
2740 | have one child, except for function ptrs, which have no children, | |
2741 | and except for void*, as we don't know what to show. | |
2742 | ||
0755e6c1 FN |
2743 | We can show char* so we allow it to be dereferenced. If you decide |
2744 | to test for it, please mind that a little magic is necessary to | |
2745 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
2746 | TYPE_NAME == "char" */ | |
2024f65a VP |
2747 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
2748 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
2749 | children = 0; | |
2750 | else | |
2751 | children = 1; | |
8b93c638 JM |
2752 | break; |
2753 | ||
2754 | default: | |
2755 | /* Other types have no children */ | |
2756 | break; | |
2757 | } | |
2758 | ||
2759 | return children; | |
2760 | } | |
2761 | ||
2762 | static char * | |
fba45db2 | 2763 | c_name_of_variable (struct varobj *parent) |
8b93c638 | 2764 | { |
1b36a34b | 2765 | return xstrdup (parent->name); |
8b93c638 JM |
2766 | } |
2767 | ||
bbec2603 VP |
2768 | /* Return the value of element TYPE_INDEX of a structure |
2769 | value VALUE. VALUE's type should be a structure, | |
2770 | or union, or a typedef to struct/union. | |
2771 | ||
2772 | Returns NULL if getting the value fails. Never throws. */ | |
2773 | static struct value * | |
2774 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 2775 | { |
bbec2603 VP |
2776 | struct value *result = NULL; |
2777 | volatile struct gdb_exception e; | |
bbec2603 | 2778 | struct type *type = value_type (value); |
a109c7c1 | 2779 | |
bbec2603 VP |
2780 | type = check_typedef (type); |
2781 | ||
2782 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2783 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 2784 | |
bbec2603 VP |
2785 | TRY_CATCH (e, RETURN_MASK_ERROR) |
2786 | { | |
d6a843b5 | 2787 | if (field_is_static (&TYPE_FIELD (type, type_index))) |
bbec2603 VP |
2788 | result = value_static_field (type, type_index); |
2789 | else | |
2790 | result = value_primitive_field (value, 0, type_index, type); | |
2791 | } | |
2792 | if (e.reason < 0) | |
2793 | { | |
2794 | return NULL; | |
2795 | } | |
2796 | else | |
2797 | { | |
2798 | return result; | |
2799 | } | |
2800 | } | |
2801 | ||
2802 | /* Obtain the information about child INDEX of the variable | |
2803 | object PARENT. | |
2804 | If CNAME is not null, sets *CNAME to the name of the child relative | |
2805 | to the parent. | |
2806 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
2807 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
2808 | ||
2809 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
2810 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
2811 | to NULL. */ | |
2812 | static void | |
2813 | c_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2814 | char **cname, struct value **cvalue, struct type **ctype, |
2815 | char **cfull_expression) | |
bbec2603 VP |
2816 | { |
2817 | struct value *value = parent->value; | |
2024f65a | 2818 | struct type *type = get_value_type (parent); |
02142340 VP |
2819 | char *parent_expression = NULL; |
2820 | int was_ptr; | |
bbec2603 VP |
2821 | |
2822 | if (cname) | |
2823 | *cname = NULL; | |
2824 | if (cvalue) | |
2825 | *cvalue = NULL; | |
2826 | if (ctype) | |
2827 | *ctype = NULL; | |
02142340 VP |
2828 | if (cfull_expression) |
2829 | { | |
2830 | *cfull_expression = NULL; | |
2831 | parent_expression = varobj_get_path_expr (parent); | |
2832 | } | |
2833 | adjust_value_for_child_access (&value, &type, &was_ptr); | |
bbec2603 | 2834 | |
8b93c638 JM |
2835 | switch (TYPE_CODE (type)) |
2836 | { | |
2837 | case TYPE_CODE_ARRAY: | |
bbec2603 | 2838 | if (cname) |
43bbcdc2 PH |
2839 | *cname = xstrdup (int_string (index |
2840 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)), | |
2841 | 10, 1, 0, 0)); | |
bbec2603 VP |
2842 | |
2843 | if (cvalue && value) | |
2844 | { | |
2845 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
a109c7c1 | 2846 | |
2497b498 | 2847 | gdb_value_subscript (value, real_index, cvalue); |
bbec2603 VP |
2848 | } |
2849 | ||
2850 | if (ctype) | |
2851 | *ctype = get_target_type (type); | |
2852 | ||
02142340 | 2853 | if (cfull_expression) |
43bbcdc2 PH |
2854 | *cfull_expression = |
2855 | xstrprintf ("(%s)[%s]", parent_expression, | |
2856 | int_string (index | |
2857 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)), | |
2858 | 10, 1, 0, 0)); | |
02142340 VP |
2859 | |
2860 | ||
8b93c638 JM |
2861 | break; |
2862 | ||
2863 | case TYPE_CODE_STRUCT: | |
2864 | case TYPE_CODE_UNION: | |
bbec2603 | 2865 | if (cname) |
1b36a34b | 2866 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); |
bbec2603 VP |
2867 | |
2868 | if (cvalue && value) | |
2869 | { | |
2870 | /* For C, varobj index is the same as type index. */ | |
2871 | *cvalue = value_struct_element_index (value, index); | |
2872 | } | |
2873 | ||
2874 | if (ctype) | |
2875 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2876 | ||
02142340 VP |
2877 | if (cfull_expression) |
2878 | { | |
2879 | char *join = was_ptr ? "->" : "."; | |
a109c7c1 | 2880 | |
02142340 VP |
2881 | *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, join, |
2882 | TYPE_FIELD_NAME (type, index)); | |
2883 | } | |
2884 | ||
8b93c638 JM |
2885 | break; |
2886 | ||
2887 | case TYPE_CODE_PTR: | |
bbec2603 VP |
2888 | if (cname) |
2889 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 2890 | |
bbec2603 | 2891 | if (cvalue && value) |
3f4178d6 DJ |
2892 | { |
2893 | int success = gdb_value_ind (value, cvalue); | |
a109c7c1 | 2894 | |
3f4178d6 DJ |
2895 | if (!success) |
2896 | *cvalue = NULL; | |
2897 | } | |
bbec2603 | 2898 | |
2024f65a VP |
2899 | /* Don't use get_target_type because it calls |
2900 | check_typedef and here, we want to show the true | |
2901 | declared type of the variable. */ | |
bbec2603 | 2902 | if (ctype) |
2024f65a | 2903 | *ctype = TYPE_TARGET_TYPE (type); |
02142340 VP |
2904 | |
2905 | if (cfull_expression) | |
2906 | *cfull_expression = xstrprintf ("*(%s)", parent_expression); | |
bbec2603 | 2907 | |
8b93c638 JM |
2908 | break; |
2909 | ||
2910 | default: | |
2911 | /* This should not happen */ | |
bbec2603 VP |
2912 | if (cname) |
2913 | *cname = xstrdup ("???"); | |
02142340 VP |
2914 | if (cfull_expression) |
2915 | *cfull_expression = xstrdup ("???"); | |
bbec2603 | 2916 | /* Don't set value and type, we don't know then. */ |
8b93c638 | 2917 | } |
bbec2603 | 2918 | } |
8b93c638 | 2919 | |
bbec2603 VP |
2920 | static char * |
2921 | c_name_of_child (struct varobj *parent, int index) | |
2922 | { | |
2923 | char *name; | |
a109c7c1 | 2924 | |
02142340 | 2925 | c_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2926 | return name; |
2927 | } | |
2928 | ||
02142340 VP |
2929 | static char * |
2930 | c_path_expr_of_child (struct varobj *child) | |
2931 | { | |
2932 | c_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2933 | &child->path_expr); | |
2934 | return child->path_expr; | |
2935 | } | |
2936 | ||
c5b48eac VP |
2937 | /* If frame associated with VAR can be found, switch |
2938 | to it and return 1. Otherwise, return 0. */ | |
2939 | static int | |
2940 | check_scope (struct varobj *var) | |
2941 | { | |
2942 | struct frame_info *fi; | |
2943 | int scope; | |
2944 | ||
2945 | fi = frame_find_by_id (var->root->frame); | |
2946 | scope = fi != NULL; | |
2947 | ||
2948 | if (fi) | |
2949 | { | |
2950 | CORE_ADDR pc = get_frame_pc (fi); | |
a109c7c1 | 2951 | |
c5b48eac VP |
2952 | if (pc < BLOCK_START (var->root->valid_block) || |
2953 | pc >= BLOCK_END (var->root->valid_block)) | |
2954 | scope = 0; | |
2955 | else | |
2956 | select_frame (fi); | |
2957 | } | |
2958 | return scope; | |
2959 | } | |
2960 | ||
30b28db1 | 2961 | static struct value * |
fba45db2 | 2962 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 2963 | { |
5e572bb4 | 2964 | struct value *new_val = NULL; |
73a93a32 | 2965 | struct varobj *var = *var_handle; |
c5b48eac | 2966 | int within_scope = 0; |
6208b47d VP |
2967 | struct cleanup *back_to; |
2968 | ||
73a93a32 | 2969 | /* Only root variables can be updated... */ |
b2c2bd75 | 2970 | if (!is_root_p (var)) |
73a93a32 JI |
2971 | /* Not a root var */ |
2972 | return NULL; | |
2973 | ||
4f8d22e3 | 2974 | back_to = make_cleanup_restore_current_thread (); |
72330bd6 | 2975 | |
8b93c638 | 2976 | /* Determine whether the variable is still around. */ |
a5defcdc | 2977 | if (var->root->valid_block == NULL || var->root->floating) |
8b93c638 | 2978 | within_scope = 1; |
c5b48eac VP |
2979 | else if (var->root->thread_id == 0) |
2980 | { | |
2981 | /* The program was single-threaded when the variable object was | |
2982 | created. Technically, it's possible that the program became | |
2983 | multi-threaded since then, but we don't support such | |
2984 | scenario yet. */ | |
2985 | within_scope = check_scope (var); | |
2986 | } | |
8b93c638 JM |
2987 | else |
2988 | { | |
c5b48eac VP |
2989 | ptid_t ptid = thread_id_to_pid (var->root->thread_id); |
2990 | if (in_thread_list (ptid)) | |
d2353924 | 2991 | { |
c5b48eac VP |
2992 | switch_to_thread (ptid); |
2993 | within_scope = check_scope (var); | |
2994 | } | |
8b93c638 | 2995 | } |
72330bd6 | 2996 | |
8b93c638 JM |
2997 | if (within_scope) |
2998 | { | |
73a93a32 | 2999 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
3000 | expression fails we want to just return NULL. */ |
3001 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
3002 | return new_val; |
3003 | } | |
3004 | ||
6208b47d VP |
3005 | do_cleanups (back_to); |
3006 | ||
8b93c638 JM |
3007 | return NULL; |
3008 | } | |
3009 | ||
30b28db1 | 3010 | static struct value * |
fba45db2 | 3011 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 3012 | { |
bbec2603 | 3013 | struct value *value = NULL; |
8b93c638 | 3014 | |
a109c7c1 | 3015 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
3016 | return value; |
3017 | } | |
3018 | ||
3019 | static struct type * | |
fba45db2 | 3020 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 3021 | { |
bbec2603 | 3022 | struct type *type = NULL; |
a109c7c1 | 3023 | |
02142340 | 3024 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
3025 | return type; |
3026 | } | |
3027 | ||
8b93c638 | 3028 | static char * |
de051565 | 3029 | c_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 3030 | { |
14b3d9c9 JB |
3031 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
3032 | it will print out its children instead of "{...}". So we need to | |
3033 | catch that case explicitly. */ | |
3034 | struct type *type = get_type (var); | |
e64d9b3d | 3035 | |
b6313243 TT |
3036 | /* If we have a custom formatter, return whatever string it has |
3037 | produced. */ | |
3038 | if (var->pretty_printer && var->print_value) | |
3039 | return xstrdup (var->print_value); | |
3040 | ||
14b3d9c9 JB |
3041 | /* Strip top-level references. */ |
3042 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
3043 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
3044 | ||
3045 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
3046 | { |
3047 | case TYPE_CODE_STRUCT: | |
3048 | case TYPE_CODE_UNION: | |
3049 | return xstrdup ("{...}"); | |
3050 | /* break; */ | |
3051 | ||
3052 | case TYPE_CODE_ARRAY: | |
3053 | { | |
e64d9b3d | 3054 | char *number; |
a109c7c1 | 3055 | |
b435e160 | 3056 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 3057 | return (number); |
8b93c638 JM |
3058 | } |
3059 | /* break; */ | |
3060 | ||
3061 | default: | |
3062 | { | |
575bbeb6 KS |
3063 | if (var->value == NULL) |
3064 | { | |
3065 | /* This can happen if we attempt to get the value of a struct | |
3066 | member when the parent is an invalid pointer. This is an | |
3067 | error condition, so we should tell the caller. */ | |
3068 | return NULL; | |
3069 | } | |
3070 | else | |
3071 | { | |
25d5ea92 VP |
3072 | if (var->not_fetched && value_lazy (var->value)) |
3073 | /* Frozen variable and no value yet. We don't | |
3074 | implicitly fetch the value. MI response will | |
3075 | use empty string for the value, which is OK. */ | |
3076 | return NULL; | |
3077 | ||
b2c2bd75 | 3078 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 3079 | gdb_assert (!value_lazy (var->value)); |
de051565 MK |
3080 | |
3081 | /* If the specified format is the current one, | |
3082 | we can reuse print_value */ | |
3083 | if (format == var->format) | |
3084 | return xstrdup (var->print_value); | |
3085 | else | |
d452c4bc | 3086 | return value_get_print_value (var->value, format, var); |
85265413 | 3087 | } |
e64d9b3d | 3088 | } |
8b93c638 JM |
3089 | } |
3090 | } | |
3091 | \f | |
3092 | ||
3093 | /* C++ */ | |
3094 | ||
3095 | static int | |
fba45db2 | 3096 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
3097 | { |
3098 | struct type *type; | |
3099 | int children, dont_know; | |
3100 | ||
3101 | dont_know = 1; | |
3102 | children = 0; | |
3103 | ||
3104 | if (!CPLUS_FAKE_CHILD (var)) | |
3105 | { | |
2024f65a | 3106 | type = get_value_type (var); |
02142340 | 3107 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
3108 | |
3109 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 3110 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
3111 | { |
3112 | int kids[3]; | |
3113 | ||
3114 | cplus_class_num_children (type, kids); | |
3115 | if (kids[v_public] != 0) | |
3116 | children++; | |
3117 | if (kids[v_private] != 0) | |
3118 | children++; | |
3119 | if (kids[v_protected] != 0) | |
3120 | children++; | |
3121 | ||
3122 | /* Add any baseclasses */ | |
3123 | children += TYPE_N_BASECLASSES (type); | |
3124 | dont_know = 0; | |
3125 | ||
3126 | /* FIXME: save children in var */ | |
3127 | } | |
3128 | } | |
3129 | else | |
3130 | { | |
3131 | int kids[3]; | |
3132 | ||
2024f65a | 3133 | type = get_value_type (var->parent); |
02142340 | 3134 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
3135 | |
3136 | cplus_class_num_children (type, kids); | |
6e382aa3 | 3137 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 3138 | children = kids[v_public]; |
6e382aa3 | 3139 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
3140 | children = kids[v_private]; |
3141 | else | |
3142 | children = kids[v_protected]; | |
3143 | dont_know = 0; | |
3144 | } | |
3145 | ||
3146 | if (dont_know) | |
3147 | children = c_number_of_children (var); | |
3148 | ||
3149 | return children; | |
3150 | } | |
3151 | ||
3152 | /* Compute # of public, private, and protected variables in this class. | |
3153 | That means we need to descend into all baseclasses and find out | |
3154 | how many are there, too. */ | |
3155 | static void | |
1669605f | 3156 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 | 3157 | { |
d48cc9dd DJ |
3158 | int i, vptr_fieldno; |
3159 | struct type *basetype = NULL; | |
8b93c638 JM |
3160 | |
3161 | children[v_public] = 0; | |
3162 | children[v_private] = 0; | |
3163 | children[v_protected] = 0; | |
3164 | ||
d48cc9dd | 3165 | vptr_fieldno = get_vptr_fieldno (type, &basetype); |
8b93c638 JM |
3166 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) |
3167 | { | |
d48cc9dd DJ |
3168 | /* If we have a virtual table pointer, omit it. Even if virtual |
3169 | table pointers are not specifically marked in the debug info, | |
3170 | they should be artificial. */ | |
3171 | if ((type == basetype && i == vptr_fieldno) | |
3172 | || TYPE_FIELD_ARTIFICIAL (type, i)) | |
8b93c638 JM |
3173 | continue; |
3174 | ||
3175 | if (TYPE_FIELD_PROTECTED (type, i)) | |
3176 | children[v_protected]++; | |
3177 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
3178 | children[v_private]++; | |
3179 | else | |
3180 | children[v_public]++; | |
3181 | } | |
3182 | } | |
3183 | ||
3184 | static char * | |
fba45db2 | 3185 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
3186 | { |
3187 | return c_name_of_variable (parent); | |
3188 | } | |
3189 | ||
2024f65a VP |
3190 | enum accessibility { private_field, protected_field, public_field }; |
3191 | ||
3192 | /* Check if field INDEX of TYPE has the specified accessibility. | |
3193 | Return 0 if so and 1 otherwise. */ | |
3194 | static int | |
3195 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 3196 | { |
2024f65a VP |
3197 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
3198 | return 1; | |
3199 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
3200 | return 1; | |
3201 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
3202 | && !TYPE_FIELD_PROTECTED (type, index)) | |
3203 | return 1; | |
3204 | else | |
3205 | return 0; | |
3206 | } | |
3207 | ||
3208 | static void | |
3209 | cplus_describe_child (struct varobj *parent, int index, | |
02142340 VP |
3210 | char **cname, struct value **cvalue, struct type **ctype, |
3211 | char **cfull_expression) | |
2024f65a | 3212 | { |
2024f65a | 3213 | struct value *value; |
8b93c638 | 3214 | struct type *type; |
02142340 VP |
3215 | int was_ptr; |
3216 | char *parent_expression = NULL; | |
8b93c638 | 3217 | |
2024f65a VP |
3218 | if (cname) |
3219 | *cname = NULL; | |
3220 | if (cvalue) | |
3221 | *cvalue = NULL; | |
3222 | if (ctype) | |
3223 | *ctype = NULL; | |
02142340 VP |
3224 | if (cfull_expression) |
3225 | *cfull_expression = NULL; | |
2024f65a | 3226 | |
8b93c638 JM |
3227 | if (CPLUS_FAKE_CHILD (parent)) |
3228 | { | |
2024f65a VP |
3229 | value = parent->parent->value; |
3230 | type = get_value_type (parent->parent); | |
02142340 VP |
3231 | if (cfull_expression) |
3232 | parent_expression = varobj_get_path_expr (parent->parent); | |
8b93c638 JM |
3233 | } |
3234 | else | |
2024f65a VP |
3235 | { |
3236 | value = parent->value; | |
3237 | type = get_value_type (parent); | |
02142340 VP |
3238 | if (cfull_expression) |
3239 | parent_expression = varobj_get_path_expr (parent); | |
2024f65a | 3240 | } |
8b93c638 | 3241 | |
02142340 | 3242 | adjust_value_for_child_access (&value, &type, &was_ptr); |
2024f65a VP |
3243 | |
3244 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
3f4178d6 | 3245 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
8b93c638 | 3246 | { |
02142340 | 3247 | char *join = was_ptr ? "->" : "."; |
a109c7c1 | 3248 | |
8b93c638 JM |
3249 | if (CPLUS_FAKE_CHILD (parent)) |
3250 | { | |
6e382aa3 JJ |
3251 | /* The fields of the class type are ordered as they |
3252 | appear in the class. We are given an index for a | |
3253 | particular access control type ("public","protected", | |
3254 | or "private"). We must skip over fields that don't | |
3255 | have the access control we are looking for to properly | |
3256 | find the indexed field. */ | |
3257 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 3258 | enum accessibility acc = public_field; |
d48cc9dd DJ |
3259 | int vptr_fieldno; |
3260 | struct type *basetype = NULL; | |
3261 | ||
3262 | vptr_fieldno = get_vptr_fieldno (type, &basetype); | |
6e382aa3 | 3263 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 3264 | acc = private_field; |
6e382aa3 | 3265 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
3266 | acc = protected_field; |
3267 | ||
3268 | while (index >= 0) | |
6e382aa3 | 3269 | { |
d48cc9dd DJ |
3270 | if ((type == basetype && type_index == vptr_fieldno) |
3271 | || TYPE_FIELD_ARTIFICIAL (type, type_index)) | |
2024f65a VP |
3272 | ; /* ignore vptr */ |
3273 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
3274 | --index; |
3275 | ++type_index; | |
6e382aa3 | 3276 | } |
2024f65a VP |
3277 | --type_index; |
3278 | ||
3279 | if (cname) | |
3280 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
3281 | ||
3282 | if (cvalue && value) | |
3283 | *cvalue = value_struct_element_index (value, type_index); | |
3284 | ||
3285 | if (ctype) | |
3286 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
02142340 VP |
3287 | |
3288 | if (cfull_expression) | |
3289 | *cfull_expression = xstrprintf ("((%s)%s%s)", parent_expression, | |
3290 | join, | |
3291 | TYPE_FIELD_NAME (type, type_index)); | |
2024f65a VP |
3292 | } |
3293 | else if (index < TYPE_N_BASECLASSES (type)) | |
3294 | { | |
3295 | /* This is a baseclass. */ | |
3296 | if (cname) | |
3297 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
3298 | ||
3299 | if (cvalue && value) | |
0cc7d26f | 3300 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
6e382aa3 | 3301 | |
2024f65a VP |
3302 | if (ctype) |
3303 | { | |
3304 | *ctype = TYPE_FIELD_TYPE (type, index); | |
3305 | } | |
02142340 VP |
3306 | |
3307 | if (cfull_expression) | |
3308 | { | |
3309 | char *ptr = was_ptr ? "*" : ""; | |
a109c7c1 | 3310 | |
02142340 VP |
3311 | /* Cast the parent to the base' type. Note that in gdb, |
3312 | expression like | |
3313 | (Base1)d | |
3314 | will create an lvalue, for all appearences, so we don't | |
3315 | need to use more fancy: | |
3316 | *(Base1*)(&d) | |
3317 | construct. */ | |
3318 | *cfull_expression = xstrprintf ("(%s(%s%s) %s)", | |
3319 | ptr, | |
3320 | TYPE_FIELD_NAME (type, index), | |
3321 | ptr, | |
3322 | parent_expression); | |
3323 | } | |
8b93c638 | 3324 | } |
8b93c638 JM |
3325 | else |
3326 | { | |
348144ba | 3327 | char *access = NULL; |
6e382aa3 | 3328 | int children[3]; |
a109c7c1 | 3329 | |
2024f65a | 3330 | cplus_class_num_children (type, children); |
6e382aa3 | 3331 | |
8b93c638 | 3332 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
3333 | only be "public", "private", or "protected" |
3334 | ||
3335 | The special "fake" children are always output by varobj in | |
3336 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
3337 | index -= TYPE_N_BASECLASSES (type); |
3338 | switch (index) | |
3339 | { | |
3340 | case 0: | |
6e382aa3 | 3341 | if (children[v_public] > 0) |
2024f65a | 3342 | access = "public"; |
6e382aa3 | 3343 | else if (children[v_private] > 0) |
2024f65a | 3344 | access = "private"; |
6e382aa3 | 3345 | else |
2024f65a | 3346 | access = "protected"; |
6e382aa3 | 3347 | break; |
8b93c638 | 3348 | case 1: |
6e382aa3 | 3349 | if (children[v_public] > 0) |
8b93c638 | 3350 | { |
6e382aa3 | 3351 | if (children[v_private] > 0) |
2024f65a | 3352 | access = "private"; |
6e382aa3 | 3353 | else |
2024f65a | 3354 | access = "protected"; |
8b93c638 | 3355 | } |
6e382aa3 | 3356 | else if (children[v_private] > 0) |
2024f65a | 3357 | access = "protected"; |
6e382aa3 | 3358 | break; |
8b93c638 | 3359 | case 2: |
6e382aa3 | 3360 | /* Must be protected */ |
2024f65a | 3361 | access = "protected"; |
6e382aa3 | 3362 | break; |
8b93c638 JM |
3363 | default: |
3364 | /* error! */ | |
3365 | break; | |
3366 | } | |
348144ba MS |
3367 | |
3368 | gdb_assert (access); | |
2024f65a VP |
3369 | if (cname) |
3370 | *cname = xstrdup (access); | |
8b93c638 | 3371 | |
02142340 | 3372 | /* Value and type and full expression are null here. */ |
2024f65a | 3373 | } |
8b93c638 | 3374 | } |
8b93c638 JM |
3375 | else |
3376 | { | |
02142340 | 3377 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
2024f65a VP |
3378 | } |
3379 | } | |
8b93c638 | 3380 | |
2024f65a VP |
3381 | static char * |
3382 | cplus_name_of_child (struct varobj *parent, int index) | |
3383 | { | |
3384 | char *name = NULL; | |
a109c7c1 | 3385 | |
02142340 | 3386 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
3387 | return name; |
3388 | } | |
3389 | ||
02142340 VP |
3390 | static char * |
3391 | cplus_path_expr_of_child (struct varobj *child) | |
3392 | { | |
3393 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
3394 | &child->path_expr); | |
3395 | return child->path_expr; | |
3396 | } | |
3397 | ||
30b28db1 | 3398 | static struct value * |
fba45db2 | 3399 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 3400 | { |
73a93a32 | 3401 | return c_value_of_root (var_handle); |
8b93c638 JM |
3402 | } |
3403 | ||
30b28db1 | 3404 | static struct value * |
fba45db2 | 3405 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 3406 | { |
2024f65a | 3407 | struct value *value = NULL; |
a109c7c1 | 3408 | |
02142340 | 3409 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
3410 | return value; |
3411 | } | |
3412 | ||
3413 | static struct type * | |
fba45db2 | 3414 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 3415 | { |
2024f65a | 3416 | struct type *type = NULL; |
a109c7c1 | 3417 | |
02142340 | 3418 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
3419 | return type; |
3420 | } | |
3421 | ||
8b93c638 | 3422 | static char * |
a109c7c1 MS |
3423 | cplus_value_of_variable (struct varobj *var, |
3424 | enum varobj_display_formats format) | |
8b93c638 JM |
3425 | { |
3426 | ||
3427 | /* If we have one of our special types, don't print out | |
3428 | any value. */ | |
3429 | if (CPLUS_FAKE_CHILD (var)) | |
3430 | return xstrdup (""); | |
3431 | ||
de051565 | 3432 | return c_value_of_variable (var, format); |
8b93c638 JM |
3433 | } |
3434 | \f | |
3435 | /* Java */ | |
3436 | ||
3437 | static int | |
fba45db2 | 3438 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
3439 | { |
3440 | return cplus_number_of_children (var); | |
3441 | } | |
3442 | ||
3443 | static char * | |
fba45db2 | 3444 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
3445 | { |
3446 | char *p, *name; | |
3447 | ||
3448 | name = cplus_name_of_variable (parent); | |
3449 | /* If the name has "-" in it, it is because we | |
3450 | needed to escape periods in the name... */ | |
3451 | p = name; | |
3452 | ||
3453 | while (*p != '\000') | |
3454 | { | |
3455 | if (*p == '-') | |
3456 | *p = '.'; | |
3457 | p++; | |
3458 | } | |
3459 | ||
3460 | return name; | |
3461 | } | |
3462 | ||
3463 | static char * | |
fba45db2 | 3464 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3465 | { |
3466 | char *name, *p; | |
3467 | ||
3468 | name = cplus_name_of_child (parent, index); | |
3469 | /* Escape any periods in the name... */ | |
3470 | p = name; | |
3471 | ||
3472 | while (*p != '\000') | |
3473 | { | |
3474 | if (*p == '.') | |
3475 | *p = '-'; | |
3476 | p++; | |
3477 | } | |
3478 | ||
3479 | return name; | |
3480 | } | |
3481 | ||
02142340 VP |
3482 | static char * |
3483 | java_path_expr_of_child (struct varobj *child) | |
3484 | { | |
3485 | return NULL; | |
3486 | } | |
3487 | ||
30b28db1 | 3488 | static struct value * |
fba45db2 | 3489 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 3490 | { |
73a93a32 | 3491 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
3492 | } |
3493 | ||
30b28db1 | 3494 | static struct value * |
fba45db2 | 3495 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3496 | { |
3497 | return cplus_value_of_child (parent, index); | |
3498 | } | |
3499 | ||
3500 | static struct type * | |
fba45db2 | 3501 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3502 | { |
3503 | return cplus_type_of_child (parent, index); | |
3504 | } | |
3505 | ||
8b93c638 | 3506 | static char * |
de051565 | 3507 | java_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 3508 | { |
de051565 | 3509 | return cplus_value_of_variable (var, format); |
8b93c638 | 3510 | } |
54333c3b JK |
3511 | |
3512 | /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them | |
3513 | with an arbitrary caller supplied DATA pointer. */ | |
3514 | ||
3515 | void | |
3516 | all_root_varobjs (void (*func) (struct varobj *var, void *data), void *data) | |
3517 | { | |
3518 | struct varobj_root *var_root, *var_root_next; | |
3519 | ||
3520 | /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */ | |
3521 | ||
3522 | for (var_root = rootlist; var_root != NULL; var_root = var_root_next) | |
3523 | { | |
3524 | var_root_next = var_root->next; | |
3525 | ||
3526 | (*func) (var_root->rootvar, data); | |
3527 | } | |
3528 | } | |
8b93c638 JM |
3529 | \f |
3530 | extern void _initialize_varobj (void); | |
3531 | void | |
3532 | _initialize_varobj (void) | |
3533 | { | |
3534 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
3535 | ||
3536 | varobj_table = xmalloc (sizeof_table); | |
3537 | memset (varobj_table, 0, sizeof_table); | |
3538 | ||
85c07804 AC |
3539 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
3540 | &varobjdebug, _("\ | |
3541 | Set varobj debugging."), _("\ | |
3542 | Show varobj debugging."), _("\ | |
3543 | When non-zero, varobj debugging is enabled."), | |
3544 | NULL, | |
920d2a44 | 3545 | show_varobjdebug, |
85c07804 | 3546 | &setlist, &showlist); |
8b93c638 | 3547 | } |
8756216b | 3548 | |
54333c3b JK |
3549 | /* Invalidate varobj VAR if it is tied to locals and re-create it if it is |
3550 | defined on globals. It is a helper for varobj_invalidate. */ | |
2dbd25e5 | 3551 | |
54333c3b JK |
3552 | static void |
3553 | varobj_invalidate_iter (struct varobj *var, void *unused) | |
8756216b | 3554 | { |
54333c3b JK |
3555 | /* Floating varobjs are reparsed on each stop, so we don't care if the |
3556 | presently parsed expression refers to something that's gone. */ | |
3557 | if (var->root->floating) | |
3558 | return; | |
8756216b | 3559 | |
54333c3b JK |
3560 | /* global var must be re-evaluated. */ |
3561 | if (var->root->valid_block == NULL) | |
2dbd25e5 | 3562 | { |
54333c3b | 3563 | struct varobj *tmp_var; |
2dbd25e5 | 3564 | |
54333c3b JK |
3565 | /* Try to create a varobj with same expression. If we succeed |
3566 | replace the old varobj, otherwise invalidate it. */ | |
3567 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
3568 | USE_CURRENT_FRAME); | |
3569 | if (tmp_var != NULL) | |
3570 | { | |
3571 | tmp_var->obj_name = xstrdup (var->obj_name); | |
3572 | varobj_delete (var, NULL, 0); | |
3573 | install_variable (tmp_var); | |
2dbd25e5 | 3574 | } |
54333c3b JK |
3575 | else |
3576 | var->root->is_valid = 0; | |
2dbd25e5 | 3577 | } |
54333c3b JK |
3578 | else /* locals must be invalidated. */ |
3579 | var->root->is_valid = 0; | |
3580 | } | |
3581 | ||
3582 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
3583 | are defined on globals. | |
3584 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
3585 | ||
3586 | void | |
3587 | varobj_invalidate (void) | |
3588 | { | |
3589 | all_root_varobjs (varobj_invalidate_iter, NULL); | |
8756216b | 3590 | } |