Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
8acc9f48 | 3 | Copyright (C) 1999-2013 Free Software Foundation, Inc. |
8b93c638 JM |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 7 | the Free Software Foundation; either version 3 of the License, or |
8b93c638 JM |
8 | (at your option) any later version. |
9 | ||
10 | This program is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8b93c638 JM |
17 | |
18 | #include "defs.h" | |
a6c442d8 | 19 | #include "exceptions.h" |
8b93c638 JM |
20 | #include "value.h" |
21 | #include "expression.h" | |
22 | #include "frame.h" | |
8b93c638 | 23 | #include "language.h" |
8b93c638 | 24 | #include "gdbcmd.h" |
d2353924 | 25 | #include "block.h" |
79a45b7d | 26 | #include "valprint.h" |
a6c442d8 MK |
27 | |
28 | #include "gdb_assert.h" | |
b66d6d2e | 29 | #include "gdb_string.h" |
0cc7d26f | 30 | #include "gdb_regex.h" |
8b93c638 JM |
31 | |
32 | #include "varobj.h" | |
28335dcc | 33 | #include "vec.h" |
6208b47d VP |
34 | #include "gdbthread.h" |
35 | #include "inferior.h" | |
181875a4 JB |
36 | #include "ada-varobj.h" |
37 | #include "ada-lang.h" | |
8b93c638 | 38 | |
b6313243 TT |
39 | #if HAVE_PYTHON |
40 | #include "python/python.h" | |
41 | #include "python/python-internal.h" | |
50389644 PA |
42 | #else |
43 | typedef int PyObject; | |
b6313243 TT |
44 | #endif |
45 | ||
85254831 KS |
46 | /* The names of varobjs representing anonymous structs or unions. */ |
47 | #define ANONYMOUS_STRUCT_NAME _("<anonymous struct>") | |
48 | #define ANONYMOUS_UNION_NAME _("<anonymous union>") | |
49 | ||
8b93c638 JM |
50 | /* Non-zero if we want to see trace of varobj level stuff. */ |
51 | ||
ccce17b0 | 52 | unsigned int varobjdebug = 0; |
920d2a44 AC |
53 | static void |
54 | show_varobjdebug (struct ui_file *file, int from_tty, | |
55 | struct cmd_list_element *c, const char *value) | |
56 | { | |
57 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
58 | } | |
8b93c638 | 59 | |
581e13c1 | 60 | /* String representations of gdb's format codes. */ |
8b93c638 | 61 | char *varobj_format_string[] = |
72330bd6 | 62 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 | 63 | |
581e13c1 | 64 | /* String representations of gdb's known languages. */ |
c573f273 | 65 | char *varobj_language_string[] = { "C", "C++", "Java" }; |
8b93c638 | 66 | |
0cc7d26f TT |
67 | /* True if we want to allow Python-based pretty-printing. */ |
68 | static int pretty_printing = 0; | |
69 | ||
70 | void | |
71 | varobj_enable_pretty_printing (void) | |
72 | { | |
73 | pretty_printing = 1; | |
74 | } | |
75 | ||
8b93c638 JM |
76 | /* Data structures */ |
77 | ||
78 | /* Every root variable has one of these structures saved in its | |
581e13c1 | 79 | varobj. Members which must be free'd are noted. */ |
8b93c638 | 80 | struct varobj_root |
72330bd6 | 81 | { |
8b93c638 | 82 | |
581e13c1 | 83 | /* Alloc'd expression for this parent. */ |
72330bd6 | 84 | struct expression *exp; |
8b93c638 | 85 | |
581e13c1 | 86 | /* Block for which this expression is valid. */ |
270140bd | 87 | const struct block *valid_block; |
8b93c638 | 88 | |
44a67aa7 VP |
89 | /* The frame for this expression. This field is set iff valid_block is |
90 | not NULL. */ | |
e64d9b3d | 91 | struct frame_id frame; |
8b93c638 | 92 | |
c5b48eac | 93 | /* The thread ID that this varobj_root belong to. This field |
581e13c1 | 94 | is only valid if valid_block is not NULL. |
c5b48eac VP |
95 | When not 0, indicates which thread 'frame' belongs to. |
96 | When 0, indicates that the thread list was empty when the varobj_root | |
97 | was created. */ | |
98 | int thread_id; | |
99 | ||
a5defcdc VP |
100 | /* If 1, the -var-update always recomputes the value in the |
101 | current thread and frame. Otherwise, variable object is | |
581e13c1 | 102 | always updated in the specific scope/thread/frame. */ |
a5defcdc | 103 | int floating; |
73a93a32 | 104 | |
8756216b DP |
105 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
106 | to symbols that do not exist anymore. */ | |
107 | int is_valid; | |
108 | ||
581e13c1 | 109 | /* Language info for this variable and its children. */ |
72330bd6 | 110 | struct language_specific *lang; |
8b93c638 | 111 | |
581e13c1 | 112 | /* The varobj for this root node. */ |
72330bd6 | 113 | struct varobj *rootvar; |
8b93c638 | 114 | |
72330bd6 AC |
115 | /* Next root variable */ |
116 | struct varobj_root *next; | |
117 | }; | |
8b93c638 | 118 | |
bb5ce47a | 119 | /* Dynamic part of varobj. */ |
8b93c638 | 120 | |
bb5ce47a YQ |
121 | struct varobj_dynamic |
122 | { | |
b6313243 TT |
123 | /* Whether the children of this varobj were requested. This field is |
124 | used to decide if dynamic varobj should recompute their children. | |
125 | In the event that the frontend never asked for the children, we | |
126 | can avoid that. */ | |
127 | int children_requested; | |
128 | ||
0cc7d26f TT |
129 | /* The pretty-printer constructor. If NULL, then the default |
130 | pretty-printer will be looked up. If None, then no | |
131 | pretty-printer will be installed. */ | |
132 | PyObject *constructor; | |
133 | ||
b6313243 TT |
134 | /* The pretty-printer that has been constructed. If NULL, then a |
135 | new printer object is needed, and one will be constructed. */ | |
136 | PyObject *pretty_printer; | |
0cc7d26f TT |
137 | |
138 | /* The iterator returned by the printer's 'children' method, or NULL | |
139 | if not available. */ | |
140 | PyObject *child_iter; | |
141 | ||
142 | /* We request one extra item from the iterator, so that we can | |
143 | report to the caller whether there are more items than we have | |
144 | already reported. However, we don't want to install this value | |
145 | when we read it, because that will mess up future updates. So, | |
146 | we stash it here instead. */ | |
147 | PyObject *saved_item; | |
72330bd6 | 148 | }; |
8b93c638 | 149 | |
8b93c638 | 150 | struct cpstack |
72330bd6 AC |
151 | { |
152 | char *name; | |
153 | struct cpstack *next; | |
154 | }; | |
8b93c638 JM |
155 | |
156 | /* A list of varobjs */ | |
157 | ||
158 | struct vlist | |
72330bd6 AC |
159 | { |
160 | struct varobj *var; | |
161 | struct vlist *next; | |
162 | }; | |
8b93c638 JM |
163 | |
164 | /* Private function prototypes */ | |
165 | ||
581e13c1 | 166 | /* Helper functions for the above subcommands. */ |
8b93c638 | 167 | |
a14ed312 | 168 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 169 | |
a14ed312 KB |
170 | static void delete_variable_1 (struct cpstack **, int *, |
171 | struct varobj *, int, int); | |
8b93c638 | 172 | |
a14ed312 | 173 | static int install_variable (struct varobj *); |
8b93c638 | 174 | |
a14ed312 | 175 | static void uninstall_variable (struct varobj *); |
8b93c638 | 176 | |
a14ed312 | 177 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 178 | |
b6313243 | 179 | static struct varobj * |
5e5ac9a5 | 180 | create_child_with_value (struct varobj *parent, int index, char *name, |
b6313243 TT |
181 | struct value *value); |
182 | ||
8b93c638 JM |
183 | /* Utility routines */ |
184 | ||
a14ed312 | 185 | static struct varobj *new_variable (void); |
8b93c638 | 186 | |
a14ed312 | 187 | static struct varobj *new_root_variable (void); |
8b93c638 | 188 | |
a14ed312 | 189 | static void free_variable (struct varobj *var); |
8b93c638 | 190 | |
74b7792f AC |
191 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
192 | ||
a14ed312 | 193 | static struct type *get_type (struct varobj *var); |
8b93c638 | 194 | |
6e2a9270 VP |
195 | static struct type *get_value_type (struct varobj *var); |
196 | ||
a14ed312 | 197 | static struct type *get_target_type (struct type *); |
8b93c638 | 198 | |
a14ed312 | 199 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 200 | |
a14ed312 | 201 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 202 | |
a14ed312 | 203 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 204 | |
8264ba82 AG |
205 | static int update_type_if_necessary (struct varobj *var, |
206 | struct value *new_value); | |
207 | ||
acd65feb VP |
208 | static int install_new_value (struct varobj *var, struct value *value, |
209 | int initial); | |
210 | ||
581e13c1 | 211 | /* Language-specific routines. */ |
8b93c638 | 212 | |
a14ed312 | 213 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 214 | |
a14ed312 | 215 | static int number_of_children (struct varobj *); |
8b93c638 | 216 | |
a14ed312 | 217 | static char *name_of_variable (struct varobj *); |
8b93c638 | 218 | |
a14ed312 | 219 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 220 | |
30b28db1 | 221 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 222 | |
30b28db1 | 223 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 224 | |
de051565 MK |
225 | static char *my_value_of_variable (struct varobj *var, |
226 | enum varobj_display_formats format); | |
8b93c638 | 227 | |
85265413 | 228 | static char *value_get_print_value (struct value *value, |
b6313243 | 229 | enum varobj_display_formats format, |
d452c4bc | 230 | struct varobj *var); |
85265413 | 231 | |
b2c2bd75 VP |
232 | static int varobj_value_is_changeable_p (struct varobj *var); |
233 | ||
234 | static int is_root_p (struct varobj *var); | |
8b93c638 | 235 | |
d8b65138 JK |
236 | #if HAVE_PYTHON |
237 | ||
9a1edae6 | 238 | static struct varobj *varobj_add_child (struct varobj *var, |
5e5ac9a5 | 239 | char *name, |
9a1edae6 | 240 | struct value *value); |
b6313243 | 241 | |
d8b65138 JK |
242 | #endif /* HAVE_PYTHON */ |
243 | ||
d32cafc7 JB |
244 | static int default_value_is_changeable_p (struct varobj *var); |
245 | ||
8b93c638 JM |
246 | /* C implementation */ |
247 | ||
a14ed312 | 248 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 249 | |
a14ed312 | 250 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 251 | |
a14ed312 | 252 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 253 | |
02142340 VP |
254 | static char *c_path_expr_of_child (struct varobj *child); |
255 | ||
30b28db1 | 256 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 257 | |
a14ed312 | 258 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 259 | |
de051565 MK |
260 | static char *c_value_of_variable (struct varobj *var, |
261 | enum varobj_display_formats format); | |
8b93c638 JM |
262 | |
263 | /* C++ implementation */ | |
264 | ||
a14ed312 | 265 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 266 | |
a14ed312 | 267 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 268 | |
a14ed312 | 269 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 270 | |
a14ed312 | 271 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 272 | |
02142340 VP |
273 | static char *cplus_path_expr_of_child (struct varobj *child); |
274 | ||
30b28db1 | 275 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 276 | |
a14ed312 | 277 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 278 | |
de051565 MK |
279 | static char *cplus_value_of_variable (struct varobj *var, |
280 | enum varobj_display_formats format); | |
8b93c638 JM |
281 | |
282 | /* Java implementation */ | |
283 | ||
a14ed312 | 284 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 285 | |
a14ed312 | 286 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 287 | |
a14ed312 | 288 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 289 | |
02142340 VP |
290 | static char *java_path_expr_of_child (struct varobj *child); |
291 | ||
30b28db1 | 292 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 293 | |
a14ed312 | 294 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 295 | |
de051565 MK |
296 | static char *java_value_of_variable (struct varobj *var, |
297 | enum varobj_display_formats format); | |
8b93c638 | 298 | |
40591b7d JCD |
299 | /* Ada implementation */ |
300 | ||
301 | static int ada_number_of_children (struct varobj *var); | |
302 | ||
303 | static char *ada_name_of_variable (struct varobj *parent); | |
304 | ||
305 | static char *ada_name_of_child (struct varobj *parent, int index); | |
306 | ||
307 | static char *ada_path_expr_of_child (struct varobj *child); | |
308 | ||
40591b7d JCD |
309 | static struct value *ada_value_of_child (struct varobj *parent, int index); |
310 | ||
311 | static struct type *ada_type_of_child (struct varobj *parent, int index); | |
312 | ||
313 | static char *ada_value_of_variable (struct varobj *var, | |
314 | enum varobj_display_formats format); | |
315 | ||
d32cafc7 JB |
316 | static int ada_value_is_changeable_p (struct varobj *var); |
317 | ||
7a290c40 JB |
318 | static int ada_value_has_mutated (struct varobj *var, struct value *new_val, |
319 | struct type *new_type); | |
320 | ||
8b93c638 JM |
321 | /* The language specific vector */ |
322 | ||
323 | struct language_specific | |
72330bd6 | 324 | { |
581e13c1 | 325 | /* The number of children of PARENT. */ |
72330bd6 | 326 | int (*number_of_children) (struct varobj * parent); |
8b93c638 | 327 | |
581e13c1 | 328 | /* The name (expression) of a root varobj. */ |
72330bd6 | 329 | char *(*name_of_variable) (struct varobj * parent); |
8b93c638 | 330 | |
581e13c1 | 331 | /* The name of the INDEX'th child of PARENT. */ |
72330bd6 | 332 | char *(*name_of_child) (struct varobj * parent, int index); |
8b93c638 | 333 | |
02142340 VP |
334 | /* Returns the rooted expression of CHILD, which is a variable |
335 | obtain that has some parent. */ | |
336 | char *(*path_expr_of_child) (struct varobj * child); | |
337 | ||
581e13c1 | 338 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
30b28db1 | 339 | struct value *(*value_of_child) (struct varobj * parent, int index); |
8b93c638 | 340 | |
581e13c1 | 341 | /* The type of the INDEX'th child of PARENT. */ |
72330bd6 | 342 | struct type *(*type_of_child) (struct varobj * parent, int index); |
8b93c638 | 343 | |
581e13c1 | 344 | /* The current value of VAR. */ |
de051565 MK |
345 | char *(*value_of_variable) (struct varobj * var, |
346 | enum varobj_display_formats format); | |
7a290c40 | 347 | |
d32cafc7 JB |
348 | /* Return non-zero if changes in value of VAR must be detected and |
349 | reported by -var-update. Return zero if -var-update should never | |
350 | report changes of such values. This makes sense for structures | |
351 | (since the changes in children values will be reported separately), | |
352 | or for artifical objects (like 'public' pseudo-field in C++). | |
353 | ||
354 | Return value of 0 means that gdb need not call value_fetch_lazy | |
355 | for the value of this variable object. */ | |
356 | int (*value_is_changeable_p) (struct varobj *var); | |
357 | ||
7a290c40 JB |
358 | /* Return nonzero if the type of VAR has mutated. |
359 | ||
360 | VAR's value is still the varobj's previous value, while NEW_VALUE | |
361 | is VAR's new value and NEW_TYPE is the var's new type. NEW_VALUE | |
362 | may be NULL indicating that there is no value available (the varobj | |
363 | may be out of scope, of may be the child of a null pointer, for | |
364 | instance). NEW_TYPE, on the other hand, must never be NULL. | |
365 | ||
366 | This function should also be able to assume that var's number of | |
367 | children is set (not < 0). | |
368 | ||
369 | Languages where types do not mutate can set this to NULL. */ | |
370 | int (*value_has_mutated) (struct varobj *var, struct value *new_value, | |
371 | struct type *new_type); | |
72330bd6 | 372 | }; |
8b93c638 | 373 | |
581e13c1 | 374 | /* Array of known source language routines. */ |
d5d6fca5 | 375 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
376 | /* C */ |
377 | { | |
72330bd6 AC |
378 | c_number_of_children, |
379 | c_name_of_variable, | |
380 | c_name_of_child, | |
02142340 | 381 | c_path_expr_of_child, |
72330bd6 AC |
382 | c_value_of_child, |
383 | c_type_of_child, | |
7a290c40 | 384 | c_value_of_variable, |
d32cafc7 | 385 | default_value_is_changeable_p, |
7a290c40 | 386 | NULL /* value_has_mutated */} |
8b93c638 JM |
387 | , |
388 | /* C++ */ | |
389 | { | |
72330bd6 AC |
390 | cplus_number_of_children, |
391 | cplus_name_of_variable, | |
392 | cplus_name_of_child, | |
02142340 | 393 | cplus_path_expr_of_child, |
72330bd6 AC |
394 | cplus_value_of_child, |
395 | cplus_type_of_child, | |
7a290c40 | 396 | cplus_value_of_variable, |
d32cafc7 | 397 | default_value_is_changeable_p, |
7a290c40 | 398 | NULL /* value_has_mutated */} |
8b93c638 JM |
399 | , |
400 | /* Java */ | |
401 | { | |
72330bd6 AC |
402 | java_number_of_children, |
403 | java_name_of_variable, | |
404 | java_name_of_child, | |
02142340 | 405 | java_path_expr_of_child, |
72330bd6 AC |
406 | java_value_of_child, |
407 | java_type_of_child, | |
7a290c40 | 408 | java_value_of_variable, |
d32cafc7 | 409 | default_value_is_changeable_p, |
7a290c40 | 410 | NULL /* value_has_mutated */}, |
40591b7d JCD |
411 | /* Ada */ |
412 | { | |
40591b7d JCD |
413 | ada_number_of_children, |
414 | ada_name_of_variable, | |
415 | ada_name_of_child, | |
416 | ada_path_expr_of_child, | |
40591b7d JCD |
417 | ada_value_of_child, |
418 | ada_type_of_child, | |
7a290c40 | 419 | ada_value_of_variable, |
d32cafc7 | 420 | ada_value_is_changeable_p, |
7a290c40 | 421 | ada_value_has_mutated} |
8b93c638 JM |
422 | }; |
423 | ||
581e13c1 | 424 | /* A little convenience enum for dealing with C++/Java. */ |
8b93c638 | 425 | enum vsections |
72330bd6 AC |
426 | { |
427 | v_public = 0, v_private, v_protected | |
428 | }; | |
8b93c638 JM |
429 | |
430 | /* Private data */ | |
431 | ||
581e13c1 | 432 | /* Mappings of varobj_display_formats enums to gdb's format codes. */ |
72330bd6 | 433 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 | 434 | |
581e13c1 | 435 | /* Header of the list of root variable objects. */ |
8b93c638 | 436 | static struct varobj_root *rootlist; |
8b93c638 | 437 | |
581e13c1 MS |
438 | /* Prime number indicating the number of buckets in the hash table. */ |
439 | /* A prime large enough to avoid too many colisions. */ | |
8b93c638 JM |
440 | #define VAROBJ_TABLE_SIZE 227 |
441 | ||
581e13c1 | 442 | /* Pointer to the varobj hash table (built at run time). */ |
8b93c638 JM |
443 | static struct vlist **varobj_table; |
444 | ||
581e13c1 | 445 | /* Is the variable X one of our "fake" children? */ |
8b93c638 JM |
446 | #define CPLUS_FAKE_CHILD(x) \ |
447 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
448 | \f | |
449 | ||
450 | /* API Implementation */ | |
b2c2bd75 VP |
451 | static int |
452 | is_root_p (struct varobj *var) | |
453 | { | |
454 | return (var->root->rootvar == var); | |
455 | } | |
8b93c638 | 456 | |
d452c4bc UW |
457 | #ifdef HAVE_PYTHON |
458 | /* Helper function to install a Python environment suitable for | |
459 | use during operations on VAR. */ | |
70221824 | 460 | static struct cleanup * |
d452c4bc UW |
461 | varobj_ensure_python_env (struct varobj *var) |
462 | { | |
463 | return ensure_python_env (var->root->exp->gdbarch, | |
464 | var->root->exp->language_defn); | |
465 | } | |
466 | #endif | |
467 | ||
581e13c1 | 468 | /* Creates a varobj (not its children). */ |
8b93c638 | 469 | |
7d8547c9 AC |
470 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
471 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
472 | ||
473 | static struct frame_info * | |
474 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
475 | { | |
476 | struct frame_info *frame = NULL; | |
477 | ||
478 | if (frame_addr == (CORE_ADDR) 0) | |
479 | return NULL; | |
480 | ||
9d49bdc2 PA |
481 | for (frame = get_current_frame (); |
482 | frame != NULL; | |
483 | frame = get_prev_frame (frame)) | |
7d8547c9 | 484 | { |
1fac167a UW |
485 | /* The CORE_ADDR we get as argument was parsed from a string GDB |
486 | output as $fp. This output got truncated to gdbarch_addr_bit. | |
487 | Truncate the frame base address in the same manner before | |
488 | comparing it against our argument. */ | |
489 | CORE_ADDR frame_base = get_frame_base_address (frame); | |
490 | int addr_bit = gdbarch_addr_bit (get_frame_arch (frame)); | |
a109c7c1 | 491 | |
1fac167a UW |
492 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
493 | frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
494 | ||
495 | if (frame_base == frame_addr) | |
7d8547c9 AC |
496 | return frame; |
497 | } | |
9d49bdc2 PA |
498 | |
499 | return NULL; | |
7d8547c9 AC |
500 | } |
501 | ||
8b93c638 JM |
502 | struct varobj * |
503 | varobj_create (char *objname, | |
72330bd6 | 504 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
505 | { |
506 | struct varobj *var; | |
8b93c638 JM |
507 | struct cleanup *old_chain; |
508 | ||
581e13c1 | 509 | /* Fill out a varobj structure for the (root) variable being constructed. */ |
8b93c638 | 510 | var = new_root_variable (); |
74b7792f | 511 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
512 | |
513 | if (expression != NULL) | |
514 | { | |
e4195b40 | 515 | struct frame_info *fi; |
35633fef | 516 | struct frame_id old_id = null_frame_id; |
e4195b40 | 517 | struct block *block; |
bbc13ae3 | 518 | const char *p; |
8b93c638 | 519 | enum varobj_languages lang; |
e55dccf0 | 520 | struct value *value = NULL; |
8e7b59a5 | 521 | volatile struct gdb_exception except; |
1bb9788d | 522 | CORE_ADDR pc; |
8b93c638 | 523 | |
9d49bdc2 PA |
524 | /* Parse and evaluate the expression, filling in as much of the |
525 | variable's data as possible. */ | |
526 | ||
527 | if (has_stack_frames ()) | |
528 | { | |
581e13c1 | 529 | /* Allow creator to specify context of variable. */ |
9d49bdc2 PA |
530 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
531 | fi = get_selected_frame (NULL); | |
532 | else | |
533 | /* FIXME: cagney/2002-11-23: This code should be doing a | |
534 | lookup using the frame ID and not just the frame's | |
535 | ``address''. This, of course, means an interface | |
536 | change. However, with out that interface change ISAs, | |
537 | such as the ia64 with its two stacks, won't work. | |
538 | Similar goes for the case where there is a frameless | |
539 | function. */ | |
540 | fi = find_frame_addr_in_frame_chain (frame); | |
541 | } | |
8b93c638 | 542 | else |
9d49bdc2 | 543 | fi = NULL; |
8b93c638 | 544 | |
581e13c1 | 545 | /* frame = -2 means always use selected frame. */ |
73a93a32 | 546 | if (type == USE_SELECTED_FRAME) |
a5defcdc | 547 | var->root->floating = 1; |
73a93a32 | 548 | |
1bb9788d | 549 | pc = 0; |
8b93c638 JM |
550 | block = NULL; |
551 | if (fi != NULL) | |
1bb9788d TT |
552 | { |
553 | block = get_frame_block (fi, 0); | |
554 | pc = get_frame_pc (fi); | |
555 | } | |
8b93c638 JM |
556 | |
557 | p = expression; | |
558 | innermost_block = NULL; | |
73a93a32 | 559 | /* Wrap the call to parse expression, so we can |
581e13c1 | 560 | return a sensible error. */ |
8e7b59a5 KS |
561 | TRY_CATCH (except, RETURN_MASK_ERROR) |
562 | { | |
1bb9788d | 563 | var->root->exp = parse_exp_1 (&p, pc, block, 0); |
8e7b59a5 KS |
564 | } |
565 | ||
566 | if (except.reason < 0) | |
73a93a32 | 567 | { |
f748fb40 | 568 | do_cleanups (old_chain); |
73a93a32 JI |
569 | return NULL; |
570 | } | |
8b93c638 | 571 | |
581e13c1 | 572 | /* Don't allow variables to be created for types. */ |
608b4967 TT |
573 | if (var->root->exp->elts[0].opcode == OP_TYPE |
574 | || var->root->exp->elts[0].opcode == OP_TYPEOF | |
575 | || var->root->exp->elts[0].opcode == OP_DECLTYPE) | |
8b93c638 JM |
576 | { |
577 | do_cleanups (old_chain); | |
bc8332bb AC |
578 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
579 | " as an expression.\n"); | |
8b93c638 JM |
580 | return NULL; |
581 | } | |
582 | ||
583 | var->format = variable_default_display (var); | |
584 | var->root->valid_block = innermost_block; | |
1b36a34b | 585 | var->name = xstrdup (expression); |
02142340 | 586 | /* For a root var, the name and the expr are the same. */ |
1b36a34b | 587 | var->path_expr = xstrdup (expression); |
8b93c638 JM |
588 | |
589 | /* When the frame is different from the current frame, | |
590 | we must select the appropriate frame before parsing | |
591 | the expression, otherwise the value will not be current. | |
581e13c1 | 592 | Since select_frame is so benign, just call it for all cases. */ |
4e22772d | 593 | if (innermost_block) |
8b93c638 | 594 | { |
4e22772d JK |
595 | /* User could specify explicit FRAME-ADDR which was not found but |
596 | EXPRESSION is frame specific and we would not be able to evaluate | |
597 | it correctly next time. With VALID_BLOCK set we must also set | |
598 | FRAME and THREAD_ID. */ | |
599 | if (fi == NULL) | |
600 | error (_("Failed to find the specified frame")); | |
601 | ||
7a424e99 | 602 | var->root->frame = get_frame_id (fi); |
c5b48eac | 603 | var->root->thread_id = pid_to_thread_id (inferior_ptid); |
35633fef | 604 | old_id = get_frame_id (get_selected_frame (NULL)); |
c5b48eac | 605 | select_frame (fi); |
8b93c638 JM |
606 | } |
607 | ||
340a7723 | 608 | /* We definitely need to catch errors here. |
8b93c638 | 609 | If evaluate_expression succeeds we got the value we wanted. |
581e13c1 | 610 | But if it fails, we still go on with a call to evaluate_type(). */ |
8e7b59a5 KS |
611 | TRY_CATCH (except, RETURN_MASK_ERROR) |
612 | { | |
613 | value = evaluate_expression (var->root->exp); | |
614 | } | |
615 | ||
616 | if (except.reason < 0) | |
e55dccf0 VP |
617 | { |
618 | /* Error getting the value. Try to at least get the | |
619 | right type. */ | |
620 | struct value *type_only_value = evaluate_type (var->root->exp); | |
a109c7c1 | 621 | |
e55dccf0 VP |
622 | var->type = value_type (type_only_value); |
623 | } | |
8264ba82 AG |
624 | else |
625 | { | |
626 | int real_type_found = 0; | |
627 | ||
628 | var->type = value_actual_type (value, 0, &real_type_found); | |
629 | if (real_type_found) | |
630 | value = value_cast (var->type, value); | |
631 | } | |
acd65feb | 632 | |
8b93c638 JM |
633 | /* Set language info */ |
634 | lang = variable_language (var); | |
d5d6fca5 | 635 | var->root->lang = &languages[lang]; |
8b93c638 | 636 | |
d32cafc7 JB |
637 | install_new_value (var, value, 1 /* Initial assignment */); |
638 | ||
581e13c1 | 639 | /* Set ourselves as our root. */ |
8b93c638 JM |
640 | var->root->rootvar = var; |
641 | ||
581e13c1 | 642 | /* Reset the selected frame. */ |
35633fef JK |
643 | if (frame_id_p (old_id)) |
644 | select_frame (frame_find_by_id (old_id)); | |
8b93c638 JM |
645 | } |
646 | ||
73a93a32 | 647 | /* If the variable object name is null, that means this |
581e13c1 | 648 | is a temporary variable, so don't install it. */ |
73a93a32 JI |
649 | |
650 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 | 651 | { |
1b36a34b | 652 | var->obj_name = xstrdup (objname); |
8b93c638 JM |
653 | |
654 | /* If a varobj name is duplicated, the install will fail so | |
581e13c1 | 655 | we must cleanup. */ |
8b93c638 JM |
656 | if (!install_variable (var)) |
657 | { | |
658 | do_cleanups (old_chain); | |
659 | return NULL; | |
660 | } | |
661 | } | |
662 | ||
663 | discard_cleanups (old_chain); | |
664 | return var; | |
665 | } | |
666 | ||
581e13c1 | 667 | /* Generates an unique name that can be used for a varobj. */ |
8b93c638 JM |
668 | |
669 | char * | |
670 | varobj_gen_name (void) | |
671 | { | |
672 | static int id = 0; | |
e64d9b3d | 673 | char *obj_name; |
8b93c638 | 674 | |
581e13c1 | 675 | /* Generate a name for this object. */ |
8b93c638 | 676 | id++; |
b435e160 | 677 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 678 | |
e64d9b3d | 679 | return obj_name; |
8b93c638 JM |
680 | } |
681 | ||
61d8f275 JK |
682 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
683 | error if OBJNAME cannot be found. */ | |
8b93c638 JM |
684 | |
685 | struct varobj * | |
686 | varobj_get_handle (char *objname) | |
687 | { | |
688 | struct vlist *cv; | |
689 | const char *chp; | |
690 | unsigned int index = 0; | |
691 | unsigned int i = 1; | |
692 | ||
693 | for (chp = objname; *chp; chp++) | |
694 | { | |
695 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
696 | } | |
697 | ||
698 | cv = *(varobj_table + index); | |
699 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
700 | cv = cv->next; | |
701 | ||
702 | if (cv == NULL) | |
8a3fe4f8 | 703 | error (_("Variable object not found")); |
8b93c638 JM |
704 | |
705 | return cv->var; | |
706 | } | |
707 | ||
581e13c1 | 708 | /* Given the handle, return the name of the object. */ |
8b93c638 JM |
709 | |
710 | char * | |
711 | varobj_get_objname (struct varobj *var) | |
712 | { | |
713 | return var->obj_name; | |
714 | } | |
715 | ||
581e13c1 | 716 | /* Given the handle, return the expression represented by the object. */ |
8b93c638 JM |
717 | |
718 | char * | |
719 | varobj_get_expression (struct varobj *var) | |
720 | { | |
721 | return name_of_variable (var); | |
722 | } | |
723 | ||
724 | /* Deletes a varobj and all its children if only_children == 0, | |
3e43a32a MS |
725 | otherwise deletes only the children; returns a malloc'ed list of |
726 | all the (malloc'ed) names of the variables that have been deleted | |
581e13c1 | 727 | (NULL terminated). */ |
8b93c638 JM |
728 | |
729 | int | |
730 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
731 | { | |
732 | int delcount; | |
733 | int mycount; | |
734 | struct cpstack *result = NULL; | |
735 | char **cp; | |
736 | ||
581e13c1 | 737 | /* Initialize a stack for temporary results. */ |
8b93c638 JM |
738 | cppush (&result, NULL); |
739 | ||
740 | if (only_children) | |
581e13c1 | 741 | /* Delete only the variable children. */ |
8b93c638 JM |
742 | delcount = delete_variable (&result, var, 1 /* only the children */ ); |
743 | else | |
581e13c1 | 744 | /* Delete the variable and all its children. */ |
8b93c638 JM |
745 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); |
746 | ||
581e13c1 | 747 | /* We may have been asked to return a list of what has been deleted. */ |
8b93c638 JM |
748 | if (dellist != NULL) |
749 | { | |
750 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
751 | ||
752 | cp = *dellist; | |
753 | mycount = delcount; | |
754 | *cp = cppop (&result); | |
755 | while ((*cp != NULL) && (mycount > 0)) | |
756 | { | |
757 | mycount--; | |
758 | cp++; | |
759 | *cp = cppop (&result); | |
760 | } | |
761 | ||
762 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 763 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 764 | mycount); |
8b93c638 JM |
765 | } |
766 | ||
767 | return delcount; | |
768 | } | |
769 | ||
d8b65138 JK |
770 | #if HAVE_PYTHON |
771 | ||
b6313243 TT |
772 | /* Convenience function for varobj_set_visualizer. Instantiate a |
773 | pretty-printer for a given value. */ | |
774 | static PyObject * | |
775 | instantiate_pretty_printer (PyObject *constructor, struct value *value) | |
776 | { | |
b6313243 TT |
777 | PyObject *val_obj = NULL; |
778 | PyObject *printer; | |
b6313243 | 779 | |
b6313243 | 780 | val_obj = value_to_value_object (value); |
b6313243 TT |
781 | if (! val_obj) |
782 | return NULL; | |
783 | ||
784 | printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL); | |
785 | Py_DECREF (val_obj); | |
786 | return printer; | |
b6313243 TT |
787 | } |
788 | ||
d8b65138 JK |
789 | #endif |
790 | ||
581e13c1 | 791 | /* Set/Get variable object display format. */ |
8b93c638 JM |
792 | |
793 | enum varobj_display_formats | |
794 | varobj_set_display_format (struct varobj *var, | |
795 | enum varobj_display_formats format) | |
796 | { | |
797 | switch (format) | |
798 | { | |
799 | case FORMAT_NATURAL: | |
800 | case FORMAT_BINARY: | |
801 | case FORMAT_DECIMAL: | |
802 | case FORMAT_HEXADECIMAL: | |
803 | case FORMAT_OCTAL: | |
804 | var->format = format; | |
805 | break; | |
806 | ||
807 | default: | |
808 | var->format = variable_default_display (var); | |
809 | } | |
810 | ||
ae7d22a6 VP |
811 | if (varobj_value_is_changeable_p (var) |
812 | && var->value && !value_lazy (var->value)) | |
813 | { | |
6c761d9c | 814 | xfree (var->print_value); |
d452c4bc | 815 | var->print_value = value_get_print_value (var->value, var->format, var); |
ae7d22a6 VP |
816 | } |
817 | ||
8b93c638 JM |
818 | return var->format; |
819 | } | |
820 | ||
821 | enum varobj_display_formats | |
822 | varobj_get_display_format (struct varobj *var) | |
823 | { | |
824 | return var->format; | |
825 | } | |
826 | ||
b6313243 TT |
827 | char * |
828 | varobj_get_display_hint (struct varobj *var) | |
829 | { | |
830 | char *result = NULL; | |
831 | ||
832 | #if HAVE_PYTHON | |
0646da15 TT |
833 | struct cleanup *back_to; |
834 | ||
835 | if (!gdb_python_initialized) | |
836 | return NULL; | |
837 | ||
838 | back_to = varobj_ensure_python_env (var); | |
d452c4bc | 839 | |
bb5ce47a YQ |
840 | if (var->dynamic->pretty_printer != NULL) |
841 | result = gdbpy_get_display_hint (var->dynamic->pretty_printer); | |
d452c4bc UW |
842 | |
843 | do_cleanups (back_to); | |
b6313243 TT |
844 | #endif |
845 | ||
846 | return result; | |
847 | } | |
848 | ||
0cc7d26f TT |
849 | /* Return true if the varobj has items after TO, false otherwise. */ |
850 | ||
851 | int | |
852 | varobj_has_more (struct varobj *var, int to) | |
853 | { | |
854 | if (VEC_length (varobj_p, var->children) > to) | |
855 | return 1; | |
856 | return ((to == -1 || VEC_length (varobj_p, var->children) == to) | |
bb5ce47a | 857 | && (var->dynamic->saved_item != NULL)); |
0cc7d26f TT |
858 | } |
859 | ||
c5b48eac VP |
860 | /* If the variable object is bound to a specific thread, that |
861 | is its evaluation can always be done in context of a frame | |
862 | inside that thread, returns GDB id of the thread -- which | |
581e13c1 | 863 | is always positive. Otherwise, returns -1. */ |
c5b48eac VP |
864 | int |
865 | varobj_get_thread_id (struct varobj *var) | |
866 | { | |
867 | if (var->root->valid_block && var->root->thread_id > 0) | |
868 | return var->root->thread_id; | |
869 | else | |
870 | return -1; | |
871 | } | |
872 | ||
25d5ea92 VP |
873 | void |
874 | varobj_set_frozen (struct varobj *var, int frozen) | |
875 | { | |
876 | /* When a variable is unfrozen, we don't fetch its value. | |
877 | The 'not_fetched' flag remains set, so next -var-update | |
878 | won't complain. | |
879 | ||
880 | We don't fetch the value, because for structures the client | |
881 | should do -var-update anyway. It would be bad to have different | |
882 | client-size logic for structure and other types. */ | |
883 | var->frozen = frozen; | |
884 | } | |
885 | ||
886 | int | |
887 | varobj_get_frozen (struct varobj *var) | |
888 | { | |
889 | return var->frozen; | |
890 | } | |
891 | ||
0cc7d26f TT |
892 | /* A helper function that restricts a range to what is actually |
893 | available in a VEC. This follows the usual rules for the meaning | |
894 | of FROM and TO -- if either is negative, the entire range is | |
895 | used. */ | |
896 | ||
897 | static void | |
898 | restrict_range (VEC (varobj_p) *children, int *from, int *to) | |
899 | { | |
900 | if (*from < 0 || *to < 0) | |
901 | { | |
902 | *from = 0; | |
903 | *to = VEC_length (varobj_p, children); | |
904 | } | |
905 | else | |
906 | { | |
907 | if (*from > VEC_length (varobj_p, children)) | |
908 | *from = VEC_length (varobj_p, children); | |
909 | if (*to > VEC_length (varobj_p, children)) | |
910 | *to = VEC_length (varobj_p, children); | |
911 | if (*from > *to) | |
912 | *from = *to; | |
913 | } | |
914 | } | |
915 | ||
d8b65138 JK |
916 | #if HAVE_PYTHON |
917 | ||
0cc7d26f TT |
918 | /* A helper for update_dynamic_varobj_children that installs a new |
919 | child when needed. */ | |
920 | ||
921 | static void | |
922 | install_dynamic_child (struct varobj *var, | |
923 | VEC (varobj_p) **changed, | |
8264ba82 | 924 | VEC (varobj_p) **type_changed, |
0cc7d26f TT |
925 | VEC (varobj_p) **new, |
926 | VEC (varobj_p) **unchanged, | |
927 | int *cchanged, | |
928 | int index, | |
5e5ac9a5 | 929 | char *name, |
0cc7d26f TT |
930 | struct value *value) |
931 | { | |
932 | if (VEC_length (varobj_p, var->children) < index + 1) | |
933 | { | |
934 | /* There's no child yet. */ | |
935 | struct varobj *child = varobj_add_child (var, name, value); | |
a109c7c1 | 936 | |
0cc7d26f TT |
937 | if (new) |
938 | { | |
939 | VEC_safe_push (varobj_p, *new, child); | |
940 | *cchanged = 1; | |
941 | } | |
942 | } | |
bf8793bb | 943 | else |
0cc7d26f TT |
944 | { |
945 | varobj_p existing = VEC_index (varobj_p, var->children, index); | |
8264ba82 | 946 | int type_updated = update_type_if_necessary (existing, value); |
bf8793bb | 947 | |
8264ba82 AG |
948 | if (type_updated) |
949 | { | |
950 | if (type_changed) | |
951 | VEC_safe_push (varobj_p, *type_changed, existing); | |
952 | } | |
0cc7d26f TT |
953 | if (install_new_value (existing, value, 0)) |
954 | { | |
8264ba82 | 955 | if (!type_updated && changed) |
0cc7d26f TT |
956 | VEC_safe_push (varobj_p, *changed, existing); |
957 | } | |
8264ba82 | 958 | else if (!type_updated && unchanged) |
0cc7d26f TT |
959 | VEC_safe_push (varobj_p, *unchanged, existing); |
960 | } | |
961 | } | |
962 | ||
0cc7d26f TT |
963 | static int |
964 | dynamic_varobj_has_child_method (struct varobj *var) | |
965 | { | |
966 | struct cleanup *back_to; | |
bb5ce47a | 967 | PyObject *printer = var->dynamic->pretty_printer; |
0cc7d26f TT |
968 | int result; |
969 | ||
0646da15 TT |
970 | if (!gdb_python_initialized) |
971 | return 0; | |
972 | ||
0cc7d26f TT |
973 | back_to = varobj_ensure_python_env (var); |
974 | result = PyObject_HasAttr (printer, gdbpy_children_cst); | |
975 | do_cleanups (back_to); | |
976 | return result; | |
977 | } | |
978 | ||
979 | #endif | |
980 | ||
b6313243 TT |
981 | static int |
982 | update_dynamic_varobj_children (struct varobj *var, | |
983 | VEC (varobj_p) **changed, | |
8264ba82 | 984 | VEC (varobj_p) **type_changed, |
0cc7d26f TT |
985 | VEC (varobj_p) **new, |
986 | VEC (varobj_p) **unchanged, | |
987 | int *cchanged, | |
988 | int update_children, | |
989 | int from, | |
990 | int to) | |
b6313243 TT |
991 | { |
992 | #if HAVE_PYTHON | |
b6313243 TT |
993 | struct cleanup *back_to; |
994 | PyObject *children; | |
b6313243 | 995 | int i; |
bb5ce47a | 996 | PyObject *printer = var->dynamic->pretty_printer; |
b6313243 | 997 | |
0646da15 TT |
998 | if (!gdb_python_initialized) |
999 | return 0; | |
1000 | ||
d452c4bc | 1001 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
1002 | |
1003 | *cchanged = 0; | |
1004 | if (!PyObject_HasAttr (printer, gdbpy_children_cst)) | |
1005 | { | |
1006 | do_cleanups (back_to); | |
1007 | return 0; | |
1008 | } | |
1009 | ||
bb5ce47a | 1010 | if (update_children || var->dynamic->child_iter == NULL) |
b6313243 | 1011 | { |
0cc7d26f TT |
1012 | children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst, |
1013 | NULL); | |
b6313243 | 1014 | |
0cc7d26f TT |
1015 | if (!children) |
1016 | { | |
1017 | gdbpy_print_stack (); | |
1018 | error (_("Null value returned for children")); | |
1019 | } | |
b6313243 | 1020 | |
0cc7d26f | 1021 | make_cleanup_py_decref (children); |
b6313243 | 1022 | |
bb5ce47a YQ |
1023 | Py_XDECREF (var->dynamic->child_iter); |
1024 | var->dynamic->child_iter = PyObject_GetIter (children); | |
1025 | if (var->dynamic->child_iter == NULL) | |
0cc7d26f TT |
1026 | { |
1027 | gdbpy_print_stack (); | |
1028 | error (_("Could not get children iterator")); | |
1029 | } | |
1030 | ||
bb5ce47a YQ |
1031 | Py_XDECREF (var->dynamic->saved_item); |
1032 | var->dynamic->saved_item = NULL; | |
0cc7d26f TT |
1033 | |
1034 | i = 0; | |
b6313243 | 1035 | } |
0cc7d26f TT |
1036 | else |
1037 | i = VEC_length (varobj_p, var->children); | |
b6313243 | 1038 | |
0cc7d26f TT |
1039 | /* We ask for one extra child, so that MI can report whether there |
1040 | are more children. */ | |
1041 | for (; to < 0 || i < to + 1; ++i) | |
b6313243 | 1042 | { |
0cc7d26f | 1043 | PyObject *item; |
a4c8e806 | 1044 | int force_done = 0; |
b6313243 | 1045 | |
0cc7d26f | 1046 | /* See if there was a leftover from last time. */ |
bb5ce47a | 1047 | if (var->dynamic->saved_item) |
0cc7d26f | 1048 | { |
bb5ce47a YQ |
1049 | item = var->dynamic->saved_item; |
1050 | var->dynamic->saved_item = NULL; | |
0cc7d26f TT |
1051 | } |
1052 | else | |
bb5ce47a | 1053 | item = PyIter_Next (var->dynamic->child_iter); |
b6313243 | 1054 | |
0cc7d26f | 1055 | if (!item) |
a4c8e806 TT |
1056 | { |
1057 | /* Normal end of iteration. */ | |
1058 | if (!PyErr_Occurred ()) | |
1059 | break; | |
1060 | ||
1061 | /* If we got a memory error, just use the text as the | |
1062 | item. */ | |
1063 | if (PyErr_ExceptionMatches (gdbpy_gdb_memory_error)) | |
1064 | { | |
1065 | PyObject *type, *value, *trace; | |
1066 | char *name_str, *value_str; | |
1067 | ||
1068 | PyErr_Fetch (&type, &value, &trace); | |
1069 | value_str = gdbpy_exception_to_string (type, value); | |
1070 | Py_XDECREF (type); | |
1071 | Py_XDECREF (value); | |
1072 | Py_XDECREF (trace); | |
1073 | if (!value_str) | |
1074 | { | |
1075 | gdbpy_print_stack (); | |
1076 | break; | |
1077 | } | |
1078 | ||
1079 | name_str = xstrprintf ("<error at %d>", i); | |
1080 | item = Py_BuildValue ("(ss)", name_str, value_str); | |
1081 | xfree (name_str); | |
1082 | xfree (value_str); | |
1083 | if (!item) | |
1084 | { | |
1085 | gdbpy_print_stack (); | |
1086 | break; | |
1087 | } | |
1088 | ||
1089 | force_done = 1; | |
1090 | } | |
1091 | else | |
1092 | { | |
1093 | /* Any other kind of error. */ | |
1094 | gdbpy_print_stack (); | |
1095 | break; | |
1096 | } | |
1097 | } | |
b6313243 | 1098 | |
0cc7d26f TT |
1099 | /* We don't want to push the extra child on any report list. */ |
1100 | if (to < 0 || i < to) | |
b6313243 | 1101 | { |
0cc7d26f | 1102 | PyObject *py_v; |
ddd49eee | 1103 | const char *name; |
0cc7d26f TT |
1104 | struct value *v; |
1105 | struct cleanup *inner; | |
1106 | int can_mention = from < 0 || i >= from; | |
1107 | ||
1108 | inner = make_cleanup_py_decref (item); | |
1109 | ||
1110 | if (!PyArg_ParseTuple (item, "sO", &name, &py_v)) | |
a4c8e806 TT |
1111 | { |
1112 | gdbpy_print_stack (); | |
1113 | error (_("Invalid item from the child list")); | |
1114 | } | |
0cc7d26f TT |
1115 | |
1116 | v = convert_value_from_python (py_v); | |
8dc78533 JK |
1117 | if (v == NULL) |
1118 | gdbpy_print_stack (); | |
0cc7d26f | 1119 | install_dynamic_child (var, can_mention ? changed : NULL, |
8264ba82 | 1120 | can_mention ? type_changed : NULL, |
0cc7d26f TT |
1121 | can_mention ? new : NULL, |
1122 | can_mention ? unchanged : NULL, | |
5e5ac9a5 YQ |
1123 | can_mention ? cchanged : NULL, i, |
1124 | xstrdup (name), v); | |
0cc7d26f | 1125 | do_cleanups (inner); |
b6313243 | 1126 | } |
0cc7d26f | 1127 | else |
b6313243 | 1128 | { |
bb5ce47a YQ |
1129 | Py_XDECREF (var->dynamic->saved_item); |
1130 | var->dynamic->saved_item = item; | |
b6313243 | 1131 | |
0cc7d26f TT |
1132 | /* We want to truncate the child list just before this |
1133 | element. */ | |
1134 | break; | |
1135 | } | |
a4c8e806 TT |
1136 | |
1137 | if (force_done) | |
1138 | break; | |
b6313243 TT |
1139 | } |
1140 | ||
1141 | if (i < VEC_length (varobj_p, var->children)) | |
1142 | { | |
0cc7d26f | 1143 | int j; |
a109c7c1 | 1144 | |
0cc7d26f TT |
1145 | *cchanged = 1; |
1146 | for (j = i; j < VEC_length (varobj_p, var->children); ++j) | |
1147 | varobj_delete (VEC_index (varobj_p, var->children, j), NULL, 0); | |
1148 | VEC_truncate (varobj_p, var->children, i); | |
b6313243 | 1149 | } |
0cc7d26f TT |
1150 | |
1151 | /* If there are fewer children than requested, note that the list of | |
1152 | children changed. */ | |
1153 | if (to >= 0 && VEC_length (varobj_p, var->children) < to) | |
1154 | *cchanged = 1; | |
1155 | ||
b6313243 TT |
1156 | var->num_children = VEC_length (varobj_p, var->children); |
1157 | ||
1158 | do_cleanups (back_to); | |
1159 | ||
b6313243 TT |
1160 | return 1; |
1161 | #else | |
9e77999c | 1162 | gdb_assert_not_reached ("should never be called if Python is not enabled"); |
b6313243 TT |
1163 | #endif |
1164 | } | |
25d5ea92 | 1165 | |
8b93c638 JM |
1166 | int |
1167 | varobj_get_num_children (struct varobj *var) | |
1168 | { | |
1169 | if (var->num_children == -1) | |
b6313243 | 1170 | { |
bb5ce47a | 1171 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f TT |
1172 | { |
1173 | int dummy; | |
1174 | ||
1175 | /* If we have a dynamic varobj, don't report -1 children. | |
1176 | So, try to fetch some children first. */ | |
8264ba82 | 1177 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, &dummy, |
0cc7d26f TT |
1178 | 0, 0, 0); |
1179 | } | |
1180 | else | |
b6313243 TT |
1181 | var->num_children = number_of_children (var); |
1182 | } | |
8b93c638 | 1183 | |
0cc7d26f | 1184 | return var->num_children >= 0 ? var->num_children : 0; |
8b93c638 JM |
1185 | } |
1186 | ||
1187 | /* Creates a list of the immediate children of a variable object; | |
581e13c1 | 1188 | the return code is the number of such children or -1 on error. */ |
8b93c638 | 1189 | |
d56d46f5 | 1190 | VEC (varobj_p)* |
0cc7d26f | 1191 | varobj_list_children (struct varobj *var, int *from, int *to) |
8b93c638 | 1192 | { |
8b93c638 | 1193 | char *name; |
b6313243 TT |
1194 | int i, children_changed; |
1195 | ||
bb5ce47a | 1196 | var->dynamic->children_requested = 1; |
b6313243 | 1197 | |
bb5ce47a | 1198 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f | 1199 | { |
b6313243 TT |
1200 | /* This, in theory, can result in the number of children changing without |
1201 | frontend noticing. But well, calling -var-list-children on the same | |
1202 | varobj twice is not something a sane frontend would do. */ | |
8264ba82 AG |
1203 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, |
1204 | &children_changed, 0, 0, *to); | |
0cc7d26f TT |
1205 | restrict_range (var->children, from, to); |
1206 | return var->children; | |
1207 | } | |
8b93c638 | 1208 | |
8b93c638 JM |
1209 | if (var->num_children == -1) |
1210 | var->num_children = number_of_children (var); | |
1211 | ||
74a44383 DJ |
1212 | /* If that failed, give up. */ |
1213 | if (var->num_children == -1) | |
d56d46f5 | 1214 | return var->children; |
74a44383 | 1215 | |
28335dcc VP |
1216 | /* If we're called when the list of children is not yet initialized, |
1217 | allocate enough elements in it. */ | |
1218 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
1219 | VEC_safe_push (varobj_p, var->children, NULL); | |
1220 | ||
8b93c638 JM |
1221 | for (i = 0; i < var->num_children; i++) |
1222 | { | |
d56d46f5 | 1223 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
1224 | |
1225 | if (existing == NULL) | |
1226 | { | |
1227 | /* Either it's the first call to varobj_list_children for | |
1228 | this variable object, and the child was never created, | |
1229 | or it was explicitly deleted by the client. */ | |
1230 | name = name_of_child (var, i); | |
1231 | existing = create_child (var, i, name); | |
1232 | VEC_replace (varobj_p, var->children, i, existing); | |
1233 | } | |
8b93c638 JM |
1234 | } |
1235 | ||
0cc7d26f | 1236 | restrict_range (var->children, from, to); |
d56d46f5 | 1237 | return var->children; |
8b93c638 JM |
1238 | } |
1239 | ||
d8b65138 JK |
1240 | #if HAVE_PYTHON |
1241 | ||
b6313243 | 1242 | static struct varobj * |
5e5ac9a5 | 1243 | varobj_add_child (struct varobj *var, char *name, struct value *value) |
b6313243 TT |
1244 | { |
1245 | varobj_p v = create_child_with_value (var, | |
1246 | VEC_length (varobj_p, var->children), | |
1247 | name, value); | |
a109c7c1 | 1248 | |
b6313243 | 1249 | VEC_safe_push (varobj_p, var->children, v); |
b6313243 TT |
1250 | return v; |
1251 | } | |
1252 | ||
d8b65138 JK |
1253 | #endif /* HAVE_PYTHON */ |
1254 | ||
8b93c638 | 1255 | /* Obtain the type of an object Variable as a string similar to the one gdb |
581e13c1 | 1256 | prints on the console. */ |
8b93c638 JM |
1257 | |
1258 | char * | |
1259 | varobj_get_type (struct varobj *var) | |
1260 | { | |
581e13c1 | 1261 | /* For the "fake" variables, do not return a type. (It's type is |
8756216b DP |
1262 | NULL, too.) |
1263 | Do not return a type for invalid variables as well. */ | |
1264 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
1265 | return NULL; |
1266 | ||
1a4300e9 | 1267 | return type_to_string (var->type); |
8b93c638 JM |
1268 | } |
1269 | ||
1ecb4ee0 DJ |
1270 | /* Obtain the type of an object variable. */ |
1271 | ||
1272 | struct type * | |
1273 | varobj_get_gdb_type (struct varobj *var) | |
1274 | { | |
1275 | return var->type; | |
1276 | } | |
1277 | ||
85254831 KS |
1278 | /* Is VAR a path expression parent, i.e., can it be used to construct |
1279 | a valid path expression? */ | |
1280 | ||
1281 | static int | |
1282 | is_path_expr_parent (struct varobj *var) | |
1283 | { | |
1284 | struct type *type; | |
1285 | ||
1286 | /* "Fake" children are not path_expr parents. */ | |
1287 | if (CPLUS_FAKE_CHILD (var)) | |
1288 | return 0; | |
1289 | ||
1290 | type = get_value_type (var); | |
1291 | ||
1292 | /* Anonymous unions and structs are also not path_expr parents. */ | |
1293 | return !((TYPE_CODE (type) == TYPE_CODE_STRUCT | |
1294 | || TYPE_CODE (type) == TYPE_CODE_UNION) | |
1295 | && TYPE_NAME (type) == NULL); | |
1296 | } | |
1297 | ||
1298 | /* Return the path expression parent for VAR. */ | |
1299 | ||
1300 | static struct varobj * | |
1301 | get_path_expr_parent (struct varobj *var) | |
1302 | { | |
1303 | struct varobj *parent = var; | |
1304 | ||
1305 | while (!is_root_p (parent) && !is_path_expr_parent (parent)) | |
1306 | parent = parent->parent; | |
1307 | ||
1308 | return parent; | |
1309 | } | |
1310 | ||
02142340 VP |
1311 | /* Return a pointer to the full rooted expression of varobj VAR. |
1312 | If it has not been computed yet, compute it. */ | |
1313 | char * | |
1314 | varobj_get_path_expr (struct varobj *var) | |
1315 | { | |
1316 | if (var->path_expr != NULL) | |
1317 | return var->path_expr; | |
1318 | else | |
1319 | { | |
1320 | /* For root varobjs, we initialize path_expr | |
1321 | when creating varobj, so here it should be | |
1322 | child varobj. */ | |
1323 | gdb_assert (!is_root_p (var)); | |
1324 | return (*var->root->lang->path_expr_of_child) (var); | |
1325 | } | |
1326 | } | |
1327 | ||
8b93c638 JM |
1328 | enum varobj_languages |
1329 | varobj_get_language (struct varobj *var) | |
1330 | { | |
1331 | return variable_language (var); | |
1332 | } | |
1333 | ||
1334 | int | |
1335 | varobj_get_attributes (struct varobj *var) | |
1336 | { | |
1337 | int attributes = 0; | |
1338 | ||
340a7723 | 1339 | if (varobj_editable_p (var)) |
581e13c1 | 1340 | /* FIXME: define masks for attributes. */ |
8b93c638 JM |
1341 | attributes |= 0x00000001; /* Editable */ |
1342 | ||
1343 | return attributes; | |
1344 | } | |
1345 | ||
0cc7d26f TT |
1346 | int |
1347 | varobj_pretty_printed_p (struct varobj *var) | |
1348 | { | |
bb5ce47a | 1349 | return var->dynamic->pretty_printer != NULL; |
0cc7d26f TT |
1350 | } |
1351 | ||
de051565 MK |
1352 | char * |
1353 | varobj_get_formatted_value (struct varobj *var, | |
1354 | enum varobj_display_formats format) | |
1355 | { | |
1356 | return my_value_of_variable (var, format); | |
1357 | } | |
1358 | ||
8b93c638 JM |
1359 | char * |
1360 | varobj_get_value (struct varobj *var) | |
1361 | { | |
de051565 | 1362 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
1363 | } |
1364 | ||
1365 | /* Set the value of an object variable (if it is editable) to the | |
581e13c1 MS |
1366 | value of the given expression. */ |
1367 | /* Note: Invokes functions that can call error(). */ | |
8b93c638 JM |
1368 | |
1369 | int | |
1370 | varobj_set_value (struct varobj *var, char *expression) | |
1371 | { | |
34365054 | 1372 | struct value *val = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1373 | /* The argument "expression" contains the variable's new value. |
581e13c1 MS |
1374 | We need to first construct a legal expression for this -- ugh! */ |
1375 | /* Does this cover all the bases? */ | |
8b93c638 | 1376 | struct expression *exp; |
34365054 | 1377 | struct value *value = NULL; /* Initialize to keep gcc happy. */ |
8b93c638 | 1378 | int saved_input_radix = input_radix; |
bbc13ae3 | 1379 | const char *s = expression; |
8e7b59a5 | 1380 | volatile struct gdb_exception except; |
8b93c638 | 1381 | |
340a7723 | 1382 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 1383 | |
581e13c1 | 1384 | input_radix = 10; /* ALWAYS reset to decimal temporarily. */ |
1bb9788d | 1385 | exp = parse_exp_1 (&s, 0, 0, 0); |
8e7b59a5 KS |
1386 | TRY_CATCH (except, RETURN_MASK_ERROR) |
1387 | { | |
1388 | value = evaluate_expression (exp); | |
1389 | } | |
1390 | ||
1391 | if (except.reason < 0) | |
340a7723 | 1392 | { |
581e13c1 | 1393 | /* We cannot proceed without a valid expression. */ |
340a7723 NR |
1394 | xfree (exp); |
1395 | return 0; | |
8b93c638 JM |
1396 | } |
1397 | ||
340a7723 NR |
1398 | /* All types that are editable must also be changeable. */ |
1399 | gdb_assert (varobj_value_is_changeable_p (var)); | |
1400 | ||
1401 | /* The value of a changeable variable object must not be lazy. */ | |
1402 | gdb_assert (!value_lazy (var->value)); | |
1403 | ||
1404 | /* Need to coerce the input. We want to check if the | |
1405 | value of the variable object will be different | |
1406 | after assignment, and the first thing value_assign | |
1407 | does is coerce the input. | |
1408 | For example, if we are assigning an array to a pointer variable we | |
b021a221 | 1409 | should compare the pointer with the array's address, not with the |
340a7723 NR |
1410 | array's content. */ |
1411 | value = coerce_array (value); | |
1412 | ||
8e7b59a5 KS |
1413 | /* The new value may be lazy. value_assign, or |
1414 | rather value_contents, will take care of this. */ | |
1415 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
1416 | { | |
1417 | val = value_assign (var->value, value); | |
1418 | } | |
1419 | ||
1420 | if (except.reason < 0) | |
340a7723 | 1421 | return 0; |
8e7b59a5 | 1422 | |
340a7723 NR |
1423 | /* If the value has changed, record it, so that next -var-update can |
1424 | report this change. If a variable had a value of '1', we've set it | |
1425 | to '333' and then set again to '1', when -var-update will report this | |
1426 | variable as changed -- because the first assignment has set the | |
1427 | 'updated' flag. There's no need to optimize that, because return value | |
1428 | of -var-update should be considered an approximation. */ | |
581e13c1 | 1429 | var->updated = install_new_value (var, val, 0 /* Compare values. */); |
340a7723 NR |
1430 | input_radix = saved_input_radix; |
1431 | return 1; | |
8b93c638 JM |
1432 | } |
1433 | ||
0cc7d26f TT |
1434 | #if HAVE_PYTHON |
1435 | ||
1436 | /* A helper function to install a constructor function and visualizer | |
bb5ce47a | 1437 | in a varobj_dynamic. */ |
0cc7d26f TT |
1438 | |
1439 | static void | |
bb5ce47a | 1440 | install_visualizer (struct varobj_dynamic *var, PyObject *constructor, |
0cc7d26f TT |
1441 | PyObject *visualizer) |
1442 | { | |
1443 | Py_XDECREF (var->constructor); | |
1444 | var->constructor = constructor; | |
1445 | ||
1446 | Py_XDECREF (var->pretty_printer); | |
1447 | var->pretty_printer = visualizer; | |
1448 | ||
1449 | Py_XDECREF (var->child_iter); | |
1450 | var->child_iter = NULL; | |
1451 | } | |
1452 | ||
1453 | /* Install the default visualizer for VAR. */ | |
1454 | ||
1455 | static void | |
1456 | install_default_visualizer (struct varobj *var) | |
1457 | { | |
d65aec65 PM |
1458 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1459 | if (CPLUS_FAKE_CHILD (var)) | |
1460 | return; | |
1461 | ||
0cc7d26f TT |
1462 | if (pretty_printing) |
1463 | { | |
1464 | PyObject *pretty_printer = NULL; | |
1465 | ||
1466 | if (var->value) | |
1467 | { | |
1468 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value); | |
1469 | if (! pretty_printer) | |
1470 | { | |
1471 | gdbpy_print_stack (); | |
1472 | error (_("Cannot instantiate printer for default visualizer")); | |
1473 | } | |
1474 | } | |
1475 | ||
1476 | if (pretty_printer == Py_None) | |
1477 | { | |
1478 | Py_DECREF (pretty_printer); | |
1479 | pretty_printer = NULL; | |
1480 | } | |
1481 | ||
bb5ce47a | 1482 | install_visualizer (var->dynamic, NULL, pretty_printer); |
0cc7d26f TT |
1483 | } |
1484 | } | |
1485 | ||
1486 | /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to | |
1487 | make a new object. */ | |
1488 | ||
1489 | static void | |
1490 | construct_visualizer (struct varobj *var, PyObject *constructor) | |
1491 | { | |
1492 | PyObject *pretty_printer; | |
1493 | ||
d65aec65 PM |
1494 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1495 | if (CPLUS_FAKE_CHILD (var)) | |
1496 | return; | |
1497 | ||
0cc7d26f TT |
1498 | Py_INCREF (constructor); |
1499 | if (constructor == Py_None) | |
1500 | pretty_printer = NULL; | |
1501 | else | |
1502 | { | |
1503 | pretty_printer = instantiate_pretty_printer (constructor, var->value); | |
1504 | if (! pretty_printer) | |
1505 | { | |
1506 | gdbpy_print_stack (); | |
1507 | Py_DECREF (constructor); | |
1508 | constructor = Py_None; | |
1509 | Py_INCREF (constructor); | |
1510 | } | |
1511 | ||
1512 | if (pretty_printer == Py_None) | |
1513 | { | |
1514 | Py_DECREF (pretty_printer); | |
1515 | pretty_printer = NULL; | |
1516 | } | |
1517 | } | |
1518 | ||
bb5ce47a | 1519 | install_visualizer (var->dynamic, constructor, pretty_printer); |
0cc7d26f TT |
1520 | } |
1521 | ||
1522 | #endif /* HAVE_PYTHON */ | |
1523 | ||
1524 | /* A helper function for install_new_value. This creates and installs | |
1525 | a visualizer for VAR, if appropriate. */ | |
1526 | ||
1527 | static void | |
1528 | install_new_value_visualizer (struct varobj *var) | |
1529 | { | |
1530 | #if HAVE_PYTHON | |
1531 | /* If the constructor is None, then we want the raw value. If VAR | |
1532 | does not have a value, just skip this. */ | |
0646da15 TT |
1533 | if (!gdb_python_initialized) |
1534 | return; | |
1535 | ||
bb5ce47a | 1536 | if (var->dynamic->constructor != Py_None && var->value != NULL) |
0cc7d26f TT |
1537 | { |
1538 | struct cleanup *cleanup; | |
0cc7d26f TT |
1539 | |
1540 | cleanup = varobj_ensure_python_env (var); | |
1541 | ||
bb5ce47a | 1542 | if (var->dynamic->constructor == NULL) |
0cc7d26f TT |
1543 | install_default_visualizer (var); |
1544 | else | |
bb5ce47a | 1545 | construct_visualizer (var, var->dynamic->constructor); |
0cc7d26f TT |
1546 | |
1547 | do_cleanups (cleanup); | |
1548 | } | |
1549 | #else | |
1550 | /* Do nothing. */ | |
1551 | #endif | |
1552 | } | |
1553 | ||
8264ba82 AG |
1554 | /* When using RTTI to determine variable type it may be changed in runtime when |
1555 | the variable value is changed. This function checks whether type of varobj | |
1556 | VAR will change when a new value NEW_VALUE is assigned and if it is so | |
1557 | updates the type of VAR. */ | |
1558 | ||
1559 | static int | |
1560 | update_type_if_necessary (struct varobj *var, struct value *new_value) | |
1561 | { | |
1562 | if (new_value) | |
1563 | { | |
1564 | struct value_print_options opts; | |
1565 | ||
1566 | get_user_print_options (&opts); | |
1567 | if (opts.objectprint) | |
1568 | { | |
1569 | struct type *new_type; | |
1570 | char *curr_type_str, *new_type_str; | |
1571 | ||
1572 | new_type = value_actual_type (new_value, 0, 0); | |
1573 | new_type_str = type_to_string (new_type); | |
1574 | curr_type_str = varobj_get_type (var); | |
1575 | if (strcmp (curr_type_str, new_type_str) != 0) | |
1576 | { | |
1577 | var->type = new_type; | |
1578 | ||
1579 | /* This information may be not valid for a new type. */ | |
1580 | varobj_delete (var, NULL, 1); | |
1581 | VEC_free (varobj_p, var->children); | |
1582 | var->num_children = -1; | |
1583 | return 1; | |
1584 | } | |
1585 | } | |
1586 | } | |
1587 | ||
1588 | return 0; | |
1589 | } | |
1590 | ||
acd65feb VP |
1591 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
1592 | this is the first assignement after the variable object was just | |
1593 | created, or changed type. In that case, just assign the value | |
1594 | and return 0. | |
581e13c1 MS |
1595 | Otherwise, assign the new value, and return 1 if the value is |
1596 | different from the current one, 0 otherwise. The comparison is | |
1597 | done on textual representation of value. Therefore, some types | |
1598 | need not be compared. E.g. for structures the reported value is | |
1599 | always "{...}", so no comparison is necessary here. If the old | |
1600 | value was NULL and new one is not, or vice versa, we always return 1. | |
b26ed50d VP |
1601 | |
1602 | The VALUE parameter should not be released -- the function will | |
1603 | take care of releasing it when needed. */ | |
acd65feb VP |
1604 | static int |
1605 | install_new_value (struct varobj *var, struct value *value, int initial) | |
1606 | { | |
1607 | int changeable; | |
1608 | int need_to_fetch; | |
1609 | int changed = 0; | |
25d5ea92 | 1610 | int intentionally_not_fetched = 0; |
7a4d50bf | 1611 | char *print_value = NULL; |
acd65feb | 1612 | |
acd65feb | 1613 | /* We need to know the varobj's type to decide if the value should |
3e43a32a | 1614 | be fetched or not. C++ fake children (public/protected/private) |
581e13c1 | 1615 | don't have a type. */ |
acd65feb | 1616 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); |
b2c2bd75 | 1617 | changeable = varobj_value_is_changeable_p (var); |
b6313243 TT |
1618 | |
1619 | /* If the type has custom visualizer, we consider it to be always | |
581e13c1 | 1620 | changeable. FIXME: need to make sure this behaviour will not |
b6313243 | 1621 | mess up read-sensitive values. */ |
bb5ce47a | 1622 | if (var->dynamic->pretty_printer != NULL) |
b6313243 TT |
1623 | changeable = 1; |
1624 | ||
acd65feb VP |
1625 | need_to_fetch = changeable; |
1626 | ||
b26ed50d VP |
1627 | /* We are not interested in the address of references, and given |
1628 | that in C++ a reference is not rebindable, it cannot | |
1629 | meaningfully change. So, get hold of the real value. */ | |
1630 | if (value) | |
0cc7d26f | 1631 | value = coerce_ref (value); |
b26ed50d | 1632 | |
acd65feb VP |
1633 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1634 | /* For unions, we need to fetch the value implicitly because | |
1635 | of implementation of union member fetch. When gdb | |
1636 | creates a value for a field and the value of the enclosing | |
1637 | structure is not lazy, it immediately copies the necessary | |
1638 | bytes from the enclosing values. If the enclosing value is | |
1639 | lazy, the call to value_fetch_lazy on the field will read | |
1640 | the data from memory. For unions, that means we'll read the | |
1641 | same memory more than once, which is not desirable. So | |
1642 | fetch now. */ | |
1643 | need_to_fetch = 1; | |
1644 | ||
1645 | /* The new value might be lazy. If the type is changeable, | |
1646 | that is we'll be comparing values of this type, fetch the | |
1647 | value now. Otherwise, on the next update the old value | |
1648 | will be lazy, which means we've lost that old value. */ | |
1649 | if (need_to_fetch && value && value_lazy (value)) | |
1650 | { | |
25d5ea92 VP |
1651 | struct varobj *parent = var->parent; |
1652 | int frozen = var->frozen; | |
a109c7c1 | 1653 | |
25d5ea92 VP |
1654 | for (; !frozen && parent; parent = parent->parent) |
1655 | frozen |= parent->frozen; | |
1656 | ||
1657 | if (frozen && initial) | |
1658 | { | |
1659 | /* For variables that are frozen, or are children of frozen | |
1660 | variables, we don't do fetch on initial assignment. | |
1661 | For non-initial assignemnt we do the fetch, since it means we're | |
1662 | explicitly asked to compare the new value with the old one. */ | |
1663 | intentionally_not_fetched = 1; | |
1664 | } | |
8e7b59a5 | 1665 | else |
acd65feb | 1666 | { |
8e7b59a5 KS |
1667 | volatile struct gdb_exception except; |
1668 | ||
1669 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
1670 | { | |
1671 | value_fetch_lazy (value); | |
1672 | } | |
1673 | ||
1674 | if (except.reason < 0) | |
1675 | { | |
1676 | /* Set the value to NULL, so that for the next -var-update, | |
1677 | we don't try to compare the new value with this value, | |
1678 | that we couldn't even read. */ | |
1679 | value = NULL; | |
1680 | } | |
acd65feb | 1681 | } |
acd65feb VP |
1682 | } |
1683 | ||
e848a8a5 TT |
1684 | /* Get a reference now, before possibly passing it to any Python |
1685 | code that might release it. */ | |
1686 | if (value != NULL) | |
1687 | value_incref (value); | |
b6313243 | 1688 | |
7a4d50bf VP |
1689 | /* Below, we'll be comparing string rendering of old and new |
1690 | values. Don't get string rendering if the value is | |
1691 | lazy -- if it is, the code above has decided that the value | |
1692 | should not be fetched. */ | |
bb5ce47a YQ |
1693 | if (value != NULL && !value_lazy (value) |
1694 | && var->dynamic->pretty_printer == NULL) | |
d452c4bc | 1695 | print_value = value_get_print_value (value, var->format, var); |
7a4d50bf | 1696 | |
acd65feb VP |
1697 | /* If the type is changeable, compare the old and the new values. |
1698 | If this is the initial assignment, we don't have any old value | |
1699 | to compare with. */ | |
7a4d50bf | 1700 | if (!initial && changeable) |
acd65feb | 1701 | { |
3e43a32a MS |
1702 | /* If the value of the varobj was changed by -var-set-value, |
1703 | then the value in the varobj and in the target is the same. | |
1704 | However, that value is different from the value that the | |
581e13c1 | 1705 | varobj had after the previous -var-update. So need to the |
3e43a32a | 1706 | varobj as changed. */ |
acd65feb | 1707 | if (var->updated) |
57e66780 | 1708 | { |
57e66780 DJ |
1709 | changed = 1; |
1710 | } | |
bb5ce47a | 1711 | else if (var->dynamic->pretty_printer == NULL) |
acd65feb VP |
1712 | { |
1713 | /* Try to compare the values. That requires that both | |
1714 | values are non-lazy. */ | |
25d5ea92 VP |
1715 | if (var->not_fetched && value_lazy (var->value)) |
1716 | { | |
1717 | /* This is a frozen varobj and the value was never read. | |
1718 | Presumably, UI shows some "never read" indicator. | |
1719 | Now that we've fetched the real value, we need to report | |
1720 | this varobj as changed so that UI can show the real | |
1721 | value. */ | |
1722 | changed = 1; | |
1723 | } | |
1724 | else if (var->value == NULL && value == NULL) | |
581e13c1 | 1725 | /* Equal. */ |
acd65feb VP |
1726 | ; |
1727 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1728 | { |
57e66780 DJ |
1729 | changed = 1; |
1730 | } | |
acd65feb VP |
1731 | else |
1732 | { | |
1733 | gdb_assert (!value_lazy (var->value)); | |
1734 | gdb_assert (!value_lazy (value)); | |
85265413 | 1735 | |
57e66780 | 1736 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1737 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1738 | changed = 1; |
acd65feb VP |
1739 | } |
1740 | } | |
1741 | } | |
85265413 | 1742 | |
ee342b23 VP |
1743 | if (!initial && !changeable) |
1744 | { | |
1745 | /* For values that are not changeable, we don't compare the values. | |
1746 | However, we want to notice if a value was not NULL and now is NULL, | |
1747 | or vise versa, so that we report when top-level varobjs come in scope | |
1748 | and leave the scope. */ | |
1749 | changed = (var->value != NULL) != (value != NULL); | |
1750 | } | |
1751 | ||
acd65feb | 1752 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1753 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1754 | value_free (var->value); |
1755 | var->value = value; | |
25d5ea92 VP |
1756 | if (value && value_lazy (value) && intentionally_not_fetched) |
1757 | var->not_fetched = 1; | |
1758 | else | |
1759 | var->not_fetched = 0; | |
acd65feb | 1760 | var->updated = 0; |
85265413 | 1761 | |
0cc7d26f TT |
1762 | install_new_value_visualizer (var); |
1763 | ||
1764 | /* If we installed a pretty-printer, re-compare the printed version | |
1765 | to see if the variable changed. */ | |
bb5ce47a | 1766 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f TT |
1767 | { |
1768 | xfree (print_value); | |
1769 | print_value = value_get_print_value (var->value, var->format, var); | |
e8f781e2 TT |
1770 | if ((var->print_value == NULL && print_value != NULL) |
1771 | || (var->print_value != NULL && print_value == NULL) | |
1772 | || (var->print_value != NULL && print_value != NULL | |
1773 | && strcmp (var->print_value, print_value) != 0)) | |
0cc7d26f TT |
1774 | changed = 1; |
1775 | } | |
1776 | if (var->print_value) | |
1777 | xfree (var->print_value); | |
1778 | var->print_value = print_value; | |
1779 | ||
b26ed50d | 1780 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1781 | |
1782 | return changed; | |
1783 | } | |
acd65feb | 1784 | |
0cc7d26f TT |
1785 | /* Return the requested range for a varobj. VAR is the varobj. FROM |
1786 | and TO are out parameters; *FROM and *TO will be set to the | |
1787 | selected sub-range of VAR. If no range was selected using | |
1788 | -var-set-update-range, then both will be -1. */ | |
1789 | void | |
1790 | varobj_get_child_range (struct varobj *var, int *from, int *to) | |
b6313243 | 1791 | { |
0cc7d26f TT |
1792 | *from = var->from; |
1793 | *to = var->to; | |
b6313243 TT |
1794 | } |
1795 | ||
0cc7d26f TT |
1796 | /* Set the selected sub-range of children of VAR to start at index |
1797 | FROM and end at index TO. If either FROM or TO is less than zero, | |
1798 | this is interpreted as a request for all children. */ | |
1799 | void | |
1800 | varobj_set_child_range (struct varobj *var, int from, int to) | |
b6313243 | 1801 | { |
0cc7d26f TT |
1802 | var->from = from; |
1803 | var->to = to; | |
b6313243 TT |
1804 | } |
1805 | ||
1806 | void | |
1807 | varobj_set_visualizer (struct varobj *var, const char *visualizer) | |
1808 | { | |
1809 | #if HAVE_PYTHON | |
34fa1d9d MS |
1810 | PyObject *mainmod, *globals, *constructor; |
1811 | struct cleanup *back_to; | |
b6313243 | 1812 | |
0646da15 TT |
1813 | if (!gdb_python_initialized) |
1814 | return; | |
1815 | ||
d452c4bc | 1816 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
1817 | |
1818 | mainmod = PyImport_AddModule ("__main__"); | |
1819 | globals = PyModule_GetDict (mainmod); | |
1820 | Py_INCREF (globals); | |
1821 | make_cleanup_py_decref (globals); | |
1822 | ||
1823 | constructor = PyRun_String (visualizer, Py_eval_input, globals, globals); | |
b6313243 | 1824 | |
0cc7d26f | 1825 | if (! constructor) |
b6313243 TT |
1826 | { |
1827 | gdbpy_print_stack (); | |
da1f2771 | 1828 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
b6313243 TT |
1829 | } |
1830 | ||
0cc7d26f TT |
1831 | construct_visualizer (var, constructor); |
1832 | Py_XDECREF (constructor); | |
b6313243 | 1833 | |
0cc7d26f TT |
1834 | /* If there are any children now, wipe them. */ |
1835 | varobj_delete (var, NULL, 1 /* children only */); | |
1836 | var->num_children = -1; | |
b6313243 TT |
1837 | |
1838 | do_cleanups (back_to); | |
1839 | #else | |
da1f2771 | 1840 | error (_("Python support required")); |
b6313243 TT |
1841 | #endif |
1842 | } | |
1843 | ||
7a290c40 JB |
1844 | /* If NEW_VALUE is the new value of the given varobj (var), return |
1845 | non-zero if var has mutated. In other words, if the type of | |
1846 | the new value is different from the type of the varobj's old | |
1847 | value. | |
1848 | ||
1849 | NEW_VALUE may be NULL, if the varobj is now out of scope. */ | |
1850 | ||
1851 | static int | |
1852 | varobj_value_has_mutated (struct varobj *var, struct value *new_value, | |
1853 | struct type *new_type) | |
1854 | { | |
1855 | /* If we haven't previously computed the number of children in var, | |
1856 | it does not matter from the front-end's perspective whether | |
1857 | the type has mutated or not. For all intents and purposes, | |
1858 | it has not mutated. */ | |
1859 | if (var->num_children < 0) | |
1860 | return 0; | |
1861 | ||
1862 | if (var->root->lang->value_has_mutated) | |
1863 | return var->root->lang->value_has_mutated (var, new_value, new_type); | |
1864 | else | |
1865 | return 0; | |
1866 | } | |
1867 | ||
8b93c638 JM |
1868 | /* Update the values for a variable and its children. This is a |
1869 | two-pronged attack. First, re-parse the value for the root's | |
1870 | expression to see if it's changed. Then go all the way | |
1871 | through its children, reconstructing them and noting if they've | |
1872 | changed. | |
1873 | ||
25d5ea92 VP |
1874 | The EXPLICIT parameter specifies if this call is result |
1875 | of MI request to update this specific variable, or | |
581e13c1 | 1876 | result of implicit -var-update *. For implicit request, we don't |
25d5ea92 | 1877 | update frozen variables. |
705da579 | 1878 | |
581e13c1 | 1879 | NOTE: This function may delete the caller's varobj. If it |
8756216b DP |
1880 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1881 | to point to the new varobj. */ | |
8b93c638 | 1882 | |
1417b39d JB |
1883 | VEC(varobj_update_result) * |
1884 | varobj_update (struct varobj **varp, int explicit) | |
8b93c638 | 1885 | { |
25d5ea92 | 1886 | int type_changed = 0; |
8b93c638 | 1887 | int i; |
30b28db1 | 1888 | struct value *new; |
b6313243 | 1889 | VEC (varobj_update_result) *stack = NULL; |
f7f9ae2c | 1890 | VEC (varobj_update_result) *result = NULL; |
8b93c638 | 1891 | |
25d5ea92 VP |
1892 | /* Frozen means frozen -- we don't check for any change in |
1893 | this varobj, including its going out of scope, or | |
1894 | changing type. One use case for frozen varobjs is | |
1895 | retaining previously evaluated expressions, and we don't | |
1896 | want them to be reevaluated at all. */ | |
1897 | if (!explicit && (*varp)->frozen) | |
f7f9ae2c | 1898 | return result; |
8756216b DP |
1899 | |
1900 | if (!(*varp)->root->is_valid) | |
f7f9ae2c | 1901 | { |
cfce2ea2 | 1902 | varobj_update_result r = {0}; |
a109c7c1 | 1903 | |
cfce2ea2 | 1904 | r.varobj = *varp; |
f7f9ae2c VP |
1905 | r.status = VAROBJ_INVALID; |
1906 | VEC_safe_push (varobj_update_result, result, &r); | |
1907 | return result; | |
1908 | } | |
8b93c638 | 1909 | |
25d5ea92 | 1910 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1911 | { |
cfce2ea2 | 1912 | varobj_update_result r = {0}; |
a109c7c1 | 1913 | |
cfce2ea2 | 1914 | r.varobj = *varp; |
f7f9ae2c VP |
1915 | r.status = VAROBJ_IN_SCOPE; |
1916 | ||
581e13c1 | 1917 | /* Update the root variable. value_of_root can return NULL |
25d5ea92 | 1918 | if the variable is no longer around, i.e. we stepped out of |
581e13c1 | 1919 | the frame in which a local existed. We are letting the |
25d5ea92 VP |
1920 | value_of_root variable dispose of the varobj if the type |
1921 | has changed. */ | |
25d5ea92 | 1922 | new = value_of_root (varp, &type_changed); |
8264ba82 AG |
1923 | if (update_type_if_necessary(*varp, new)) |
1924 | type_changed = 1; | |
f7f9ae2c | 1925 | r.varobj = *varp; |
f7f9ae2c | 1926 | r.type_changed = type_changed; |
ea56f9c2 | 1927 | if (install_new_value ((*varp), new, type_changed)) |
f7f9ae2c | 1928 | r.changed = 1; |
ea56f9c2 | 1929 | |
25d5ea92 | 1930 | if (new == NULL) |
f7f9ae2c | 1931 | r.status = VAROBJ_NOT_IN_SCOPE; |
b6313243 | 1932 | r.value_installed = 1; |
f7f9ae2c VP |
1933 | |
1934 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
b6313243 | 1935 | { |
0b4bc29a JK |
1936 | if (r.type_changed || r.changed) |
1937 | VEC_safe_push (varobj_update_result, result, &r); | |
b6313243 TT |
1938 | return result; |
1939 | } | |
1940 | ||
1941 | VEC_safe_push (varobj_update_result, stack, &r); | |
1942 | } | |
1943 | else | |
1944 | { | |
cfce2ea2 | 1945 | varobj_update_result r = {0}; |
a109c7c1 | 1946 | |
cfce2ea2 | 1947 | r.varobj = *varp; |
b6313243 | 1948 | VEC_safe_push (varobj_update_result, stack, &r); |
b20d8971 | 1949 | } |
8b93c638 | 1950 | |
8756216b | 1951 | /* Walk through the children, reconstructing them all. */ |
b6313243 | 1952 | while (!VEC_empty (varobj_update_result, stack)) |
8b93c638 | 1953 | { |
b6313243 TT |
1954 | varobj_update_result r = *(VEC_last (varobj_update_result, stack)); |
1955 | struct varobj *v = r.varobj; | |
1956 | ||
1957 | VEC_pop (varobj_update_result, stack); | |
1958 | ||
1959 | /* Update this variable, unless it's a root, which is already | |
1960 | updated. */ | |
1961 | if (!r.value_installed) | |
7a290c40 JB |
1962 | { |
1963 | struct type *new_type; | |
1964 | ||
b6313243 | 1965 | new = value_of_child (v->parent, v->index); |
8264ba82 AG |
1966 | if (update_type_if_necessary(v, new)) |
1967 | r.type_changed = 1; | |
7a290c40 JB |
1968 | if (new) |
1969 | new_type = value_type (new); | |
1970 | else | |
1971 | new_type = v->root->lang->type_of_child (v->parent, v->index); | |
1972 | ||
1973 | if (varobj_value_has_mutated (v, new, new_type)) | |
1974 | { | |
1975 | /* The children are no longer valid; delete them now. | |
1976 | Report the fact that its type changed as well. */ | |
1977 | varobj_delete (v, NULL, 1 /* only_children */); | |
1978 | v->num_children = -1; | |
1979 | v->to = -1; | |
1980 | v->from = -1; | |
1981 | v->type = new_type; | |
1982 | r.type_changed = 1; | |
1983 | } | |
1984 | ||
1985 | if (install_new_value (v, new, r.type_changed)) | |
b6313243 TT |
1986 | { |
1987 | r.changed = 1; | |
1988 | v->updated = 0; | |
1989 | } | |
1990 | } | |
1991 | ||
1992 | /* We probably should not get children of a varobj that has a | |
1993 | pretty-printer, but for which -var-list-children was never | |
581e13c1 | 1994 | invoked. */ |
bb5ce47a | 1995 | if (v->dynamic->pretty_printer != NULL) |
b6313243 | 1996 | { |
8264ba82 AG |
1997 | VEC (varobj_p) *changed = 0, *type_changed = 0, *unchanged = 0; |
1998 | VEC (varobj_p) *new = 0; | |
26f9bcee | 1999 | int i, children_changed = 0; |
b6313243 TT |
2000 | |
2001 | if (v->frozen) | |
2002 | continue; | |
2003 | ||
bb5ce47a | 2004 | if (!v->dynamic->children_requested) |
0cc7d26f TT |
2005 | { |
2006 | int dummy; | |
2007 | ||
2008 | /* If we initially did not have potential children, but | |
2009 | now we do, consider the varobj as changed. | |
2010 | Otherwise, if children were never requested, consider | |
2011 | it as unchanged -- presumably, such varobj is not yet | |
2012 | expanded in the UI, so we need not bother getting | |
2013 | it. */ | |
2014 | if (!varobj_has_more (v, 0)) | |
2015 | { | |
8264ba82 | 2016 | update_dynamic_varobj_children (v, NULL, NULL, NULL, NULL, |
0cc7d26f TT |
2017 | &dummy, 0, 0, 0); |
2018 | if (varobj_has_more (v, 0)) | |
2019 | r.changed = 1; | |
2020 | } | |
2021 | ||
2022 | if (r.changed) | |
2023 | VEC_safe_push (varobj_update_result, result, &r); | |
2024 | ||
2025 | continue; | |
2026 | } | |
2027 | ||
b6313243 TT |
2028 | /* If update_dynamic_varobj_children returns 0, then we have |
2029 | a non-conforming pretty-printer, so we skip it. */ | |
8264ba82 AG |
2030 | if (update_dynamic_varobj_children (v, &changed, &type_changed, &new, |
2031 | &unchanged, &children_changed, 1, | |
0cc7d26f | 2032 | v->from, v->to)) |
b6313243 | 2033 | { |
0cc7d26f | 2034 | if (children_changed || new) |
b6313243 | 2035 | { |
0cc7d26f TT |
2036 | r.children_changed = 1; |
2037 | r.new = new; | |
b6313243 | 2038 | } |
0cc7d26f TT |
2039 | /* Push in reverse order so that the first child is |
2040 | popped from the work stack first, and so will be | |
2041 | added to result first. This does not affect | |
2042 | correctness, just "nicer". */ | |
8264ba82 AG |
2043 | for (i = VEC_length (varobj_p, type_changed) - 1; i >= 0; --i) |
2044 | { | |
2045 | varobj_p tmp = VEC_index (varobj_p, type_changed, i); | |
2046 | varobj_update_result r = {0}; | |
2047 | ||
2048 | /* Type may change only if value was changed. */ | |
2049 | r.varobj = tmp; | |
2050 | r.changed = 1; | |
2051 | r.type_changed = 1; | |
2052 | r.value_installed = 1; | |
2053 | VEC_safe_push (varobj_update_result, stack, &r); | |
2054 | } | |
0cc7d26f | 2055 | for (i = VEC_length (varobj_p, changed) - 1; i >= 0; --i) |
b6313243 | 2056 | { |
0cc7d26f | 2057 | varobj_p tmp = VEC_index (varobj_p, changed, i); |
cfce2ea2 | 2058 | varobj_update_result r = {0}; |
a109c7c1 | 2059 | |
cfce2ea2 | 2060 | r.varobj = tmp; |
0cc7d26f | 2061 | r.changed = 1; |
b6313243 TT |
2062 | r.value_installed = 1; |
2063 | VEC_safe_push (varobj_update_result, stack, &r); | |
2064 | } | |
0cc7d26f TT |
2065 | for (i = VEC_length (varobj_p, unchanged) - 1; i >= 0; --i) |
2066 | { | |
2067 | varobj_p tmp = VEC_index (varobj_p, unchanged, i); | |
a109c7c1 | 2068 | |
0cc7d26f TT |
2069 | if (!tmp->frozen) |
2070 | { | |
cfce2ea2 | 2071 | varobj_update_result r = {0}; |
a109c7c1 | 2072 | |
cfce2ea2 | 2073 | r.varobj = tmp; |
0cc7d26f TT |
2074 | r.value_installed = 1; |
2075 | VEC_safe_push (varobj_update_result, stack, &r); | |
2076 | } | |
2077 | } | |
b6313243 TT |
2078 | if (r.changed || r.children_changed) |
2079 | VEC_safe_push (varobj_update_result, result, &r); | |
0cc7d26f | 2080 | |
8264ba82 AG |
2081 | /* Free CHANGED, TYPE_CHANGED and UNCHANGED, but not NEW, |
2082 | because NEW has been put into the result vector. */ | |
0cc7d26f | 2083 | VEC_free (varobj_p, changed); |
8264ba82 | 2084 | VEC_free (varobj_p, type_changed); |
0cc7d26f TT |
2085 | VEC_free (varobj_p, unchanged); |
2086 | ||
b6313243 TT |
2087 | continue; |
2088 | } | |
2089 | } | |
28335dcc VP |
2090 | |
2091 | /* Push any children. Use reverse order so that the first | |
2092 | child is popped from the work stack first, and so | |
2093 | will be added to result first. This does not | |
2094 | affect correctness, just "nicer". */ | |
2095 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 2096 | { |
28335dcc | 2097 | varobj_p c = VEC_index (varobj_p, v->children, i); |
a109c7c1 | 2098 | |
28335dcc | 2099 | /* Child may be NULL if explicitly deleted by -var-delete. */ |
25d5ea92 | 2100 | if (c != NULL && !c->frozen) |
28335dcc | 2101 | { |
cfce2ea2 | 2102 | varobj_update_result r = {0}; |
a109c7c1 | 2103 | |
cfce2ea2 | 2104 | r.varobj = c; |
b6313243 | 2105 | VEC_safe_push (varobj_update_result, stack, &r); |
28335dcc | 2106 | } |
8b93c638 | 2107 | } |
b6313243 TT |
2108 | |
2109 | if (r.changed || r.type_changed) | |
2110 | VEC_safe_push (varobj_update_result, result, &r); | |
8b93c638 JM |
2111 | } |
2112 | ||
b6313243 TT |
2113 | VEC_free (varobj_update_result, stack); |
2114 | ||
f7f9ae2c | 2115 | return result; |
8b93c638 JM |
2116 | } |
2117 | \f | |
2118 | ||
2119 | /* Helper functions */ | |
2120 | ||
2121 | /* | |
2122 | * Variable object construction/destruction | |
2123 | */ | |
2124 | ||
2125 | static int | |
fba45db2 KB |
2126 | delete_variable (struct cpstack **resultp, struct varobj *var, |
2127 | int only_children_p) | |
8b93c638 JM |
2128 | { |
2129 | int delcount = 0; | |
2130 | ||
2131 | delete_variable_1 (resultp, &delcount, var, | |
2132 | only_children_p, 1 /* remove_from_parent_p */ ); | |
2133 | ||
2134 | return delcount; | |
2135 | } | |
2136 | ||
581e13c1 | 2137 | /* Delete the variable object VAR and its children. */ |
8b93c638 JM |
2138 | /* IMPORTANT NOTE: If we delete a variable which is a child |
2139 | and the parent is not removed we dump core. It must be always | |
581e13c1 | 2140 | initially called with remove_from_parent_p set. */ |
8b93c638 | 2141 | static void |
72330bd6 AC |
2142 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
2143 | struct varobj *var, int only_children_p, | |
2144 | int remove_from_parent_p) | |
8b93c638 | 2145 | { |
28335dcc | 2146 | int i; |
8b93c638 | 2147 | |
581e13c1 | 2148 | /* Delete any children of this variable, too. */ |
28335dcc VP |
2149 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
2150 | { | |
2151 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
a109c7c1 | 2152 | |
214270ab VP |
2153 | if (!child) |
2154 | continue; | |
8b93c638 | 2155 | if (!remove_from_parent_p) |
28335dcc VP |
2156 | child->parent = NULL; |
2157 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 2158 | } |
28335dcc | 2159 | VEC_free (varobj_p, var->children); |
8b93c638 | 2160 | |
581e13c1 | 2161 | /* if we were called to delete only the children we are done here. */ |
8b93c638 JM |
2162 | if (only_children_p) |
2163 | return; | |
2164 | ||
581e13c1 | 2165 | /* Otherwise, add it to the list of deleted ones and proceed to do so. */ |
73a93a32 | 2166 | /* If the name is null, this is a temporary variable, that has not |
581e13c1 | 2167 | yet been installed, don't report it, it belongs to the caller... */ |
73a93a32 | 2168 | if (var->obj_name != NULL) |
8b93c638 | 2169 | { |
5b616ba1 | 2170 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
2171 | *delcountp = *delcountp + 1; |
2172 | } | |
2173 | ||
581e13c1 | 2174 | /* If this variable has a parent, remove it from its parent's list. */ |
8b93c638 JM |
2175 | /* OPTIMIZATION: if the parent of this variable is also being deleted, |
2176 | (as indicated by remove_from_parent_p) we don't bother doing an | |
2177 | expensive list search to find the element to remove when we are | |
581e13c1 | 2178 | discarding the list afterwards. */ |
72330bd6 | 2179 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 2180 | { |
28335dcc | 2181 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 2182 | } |
72330bd6 | 2183 | |
73a93a32 JI |
2184 | if (var->obj_name != NULL) |
2185 | uninstall_variable (var); | |
8b93c638 | 2186 | |
581e13c1 | 2187 | /* Free memory associated with this variable. */ |
8b93c638 JM |
2188 | free_variable (var); |
2189 | } | |
2190 | ||
581e13c1 | 2191 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ |
8b93c638 | 2192 | static int |
fba45db2 | 2193 | install_variable (struct varobj *var) |
8b93c638 JM |
2194 | { |
2195 | struct vlist *cv; | |
2196 | struct vlist *newvl; | |
2197 | const char *chp; | |
2198 | unsigned int index = 0; | |
2199 | unsigned int i = 1; | |
2200 | ||
2201 | for (chp = var->obj_name; *chp; chp++) | |
2202 | { | |
2203 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
2204 | } | |
2205 | ||
2206 | cv = *(varobj_table + index); | |
2207 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
2208 | cv = cv->next; | |
2209 | ||
2210 | if (cv != NULL) | |
8a3fe4f8 | 2211 | error (_("Duplicate variable object name")); |
8b93c638 | 2212 | |
581e13c1 | 2213 | /* Add varobj to hash table. */ |
8b93c638 JM |
2214 | newvl = xmalloc (sizeof (struct vlist)); |
2215 | newvl->next = *(varobj_table + index); | |
2216 | newvl->var = var; | |
2217 | *(varobj_table + index) = newvl; | |
2218 | ||
581e13c1 | 2219 | /* If root, add varobj to root list. */ |
b2c2bd75 | 2220 | if (is_root_p (var)) |
8b93c638 | 2221 | { |
581e13c1 | 2222 | /* Add to list of root variables. */ |
8b93c638 JM |
2223 | if (rootlist == NULL) |
2224 | var->root->next = NULL; | |
2225 | else | |
2226 | var->root->next = rootlist; | |
2227 | rootlist = var->root; | |
8b93c638 JM |
2228 | } |
2229 | ||
2230 | return 1; /* OK */ | |
2231 | } | |
2232 | ||
581e13c1 | 2233 | /* Unistall the object VAR. */ |
8b93c638 | 2234 | static void |
fba45db2 | 2235 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
2236 | { |
2237 | struct vlist *cv; | |
2238 | struct vlist *prev; | |
2239 | struct varobj_root *cr; | |
2240 | struct varobj_root *prer; | |
2241 | const char *chp; | |
2242 | unsigned int index = 0; | |
2243 | unsigned int i = 1; | |
2244 | ||
581e13c1 | 2245 | /* Remove varobj from hash table. */ |
8b93c638 JM |
2246 | for (chp = var->obj_name; *chp; chp++) |
2247 | { | |
2248 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
2249 | } | |
2250 | ||
2251 | cv = *(varobj_table + index); | |
2252 | prev = NULL; | |
2253 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
2254 | { | |
2255 | prev = cv; | |
2256 | cv = cv->next; | |
2257 | } | |
2258 | ||
2259 | if (varobjdebug) | |
2260 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
2261 | ||
2262 | if (cv == NULL) | |
2263 | { | |
72330bd6 AC |
2264 | warning |
2265 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
2266 | var->obj_name); | |
8b93c638 JM |
2267 | return; |
2268 | } | |
2269 | ||
2270 | if (prev == NULL) | |
2271 | *(varobj_table + index) = cv->next; | |
2272 | else | |
2273 | prev->next = cv->next; | |
2274 | ||
b8c9b27d | 2275 | xfree (cv); |
8b93c638 | 2276 | |
581e13c1 | 2277 | /* If root, remove varobj from root list. */ |
b2c2bd75 | 2278 | if (is_root_p (var)) |
8b93c638 | 2279 | { |
581e13c1 | 2280 | /* Remove from list of root variables. */ |
8b93c638 JM |
2281 | if (rootlist == var->root) |
2282 | rootlist = var->root->next; | |
2283 | else | |
2284 | { | |
2285 | prer = NULL; | |
2286 | cr = rootlist; | |
2287 | while ((cr != NULL) && (cr->rootvar != var)) | |
2288 | { | |
2289 | prer = cr; | |
2290 | cr = cr->next; | |
2291 | } | |
2292 | if (cr == NULL) | |
2293 | { | |
8f7e195f JB |
2294 | warning (_("Assertion failed: Could not find " |
2295 | "varobj \"%s\" in root list"), | |
3e43a32a | 2296 | var->obj_name); |
8b93c638 JM |
2297 | return; |
2298 | } | |
2299 | if (prer == NULL) | |
2300 | rootlist = NULL; | |
2301 | else | |
2302 | prer->next = cr->next; | |
2303 | } | |
8b93c638 JM |
2304 | } |
2305 | ||
2306 | } | |
2307 | ||
581e13c1 | 2308 | /* Create and install a child of the parent of the given name. */ |
8b93c638 | 2309 | static struct varobj * |
fba45db2 | 2310 | create_child (struct varobj *parent, int index, char *name) |
b6313243 TT |
2311 | { |
2312 | return create_child_with_value (parent, index, name, | |
2313 | value_of_child (parent, index)); | |
2314 | } | |
2315 | ||
85254831 KS |
2316 | /* Does CHILD represent a child with no name? This happens when |
2317 | the child is an anonmous struct or union and it has no field name | |
2318 | in its parent variable. | |
2319 | ||
2320 | This has already been determined by *_describe_child. The easiest | |
2321 | thing to do is to compare the child's name with ANONYMOUS_*_NAME. */ | |
2322 | ||
2323 | static int | |
2324 | is_anonymous_child (struct varobj *child) | |
2325 | { | |
2326 | return (strcmp (child->name, ANONYMOUS_STRUCT_NAME) == 0 | |
2327 | || strcmp (child->name, ANONYMOUS_UNION_NAME) == 0); | |
2328 | } | |
2329 | ||
b6313243 | 2330 | static struct varobj * |
5e5ac9a5 | 2331 | create_child_with_value (struct varobj *parent, int index, char *name, |
b6313243 | 2332 | struct value *value) |
8b93c638 JM |
2333 | { |
2334 | struct varobj *child; | |
2335 | char *childs_name; | |
2336 | ||
2337 | child = new_variable (); | |
2338 | ||
5e5ac9a5 YQ |
2339 | /* NAME is allocated by caller. */ |
2340 | child->name = name; | |
8b93c638 | 2341 | child->index = index; |
8b93c638 JM |
2342 | child->parent = parent; |
2343 | child->root = parent->root; | |
85254831 KS |
2344 | |
2345 | if (is_anonymous_child (child)) | |
2346 | childs_name = xstrprintf ("%s.%d_anonymous", parent->obj_name, index); | |
2347 | else | |
2348 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); | |
8b93c638 | 2349 | child->obj_name = childs_name; |
85254831 | 2350 | |
8b93c638 JM |
2351 | install_variable (child); |
2352 | ||
acd65feb VP |
2353 | /* Compute the type of the child. Must do this before |
2354 | calling install_new_value. */ | |
2355 | if (value != NULL) | |
2356 | /* If the child had no evaluation errors, var->value | |
581e13c1 | 2357 | will be non-NULL and contain a valid type. */ |
8264ba82 | 2358 | child->type = value_actual_type (value, 0, NULL); |
acd65feb | 2359 | else |
581e13c1 | 2360 | /* Otherwise, we must compute the type. */ |
acd65feb VP |
2361 | child->type = (*child->root->lang->type_of_child) (child->parent, |
2362 | child->index); | |
2363 | install_new_value (child, value, 1); | |
2364 | ||
8b93c638 JM |
2365 | return child; |
2366 | } | |
8b93c638 JM |
2367 | \f |
2368 | ||
2369 | /* | |
2370 | * Miscellaneous utility functions. | |
2371 | */ | |
2372 | ||
581e13c1 | 2373 | /* Allocate memory and initialize a new variable. */ |
8b93c638 JM |
2374 | static struct varobj * |
2375 | new_variable (void) | |
2376 | { | |
2377 | struct varobj *var; | |
2378 | ||
2379 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
2380 | var->name = NULL; | |
02142340 | 2381 | var->path_expr = NULL; |
8b93c638 JM |
2382 | var->obj_name = NULL; |
2383 | var->index = -1; | |
2384 | var->type = NULL; | |
2385 | var->value = NULL; | |
8b93c638 JM |
2386 | var->num_children = -1; |
2387 | var->parent = NULL; | |
2388 | var->children = NULL; | |
2389 | var->format = 0; | |
2390 | var->root = NULL; | |
fb9b6b35 | 2391 | var->updated = 0; |
85265413 | 2392 | var->print_value = NULL; |
25d5ea92 VP |
2393 | var->frozen = 0; |
2394 | var->not_fetched = 0; | |
bb5ce47a YQ |
2395 | var->dynamic |
2396 | = (struct varobj_dynamic *) xmalloc (sizeof (struct varobj_dynamic)); | |
2397 | var->dynamic->children_requested = 0; | |
0cc7d26f TT |
2398 | var->from = -1; |
2399 | var->to = -1; | |
bb5ce47a YQ |
2400 | var->dynamic->constructor = 0; |
2401 | var->dynamic->pretty_printer = 0; | |
2402 | var->dynamic->child_iter = 0; | |
2403 | var->dynamic->saved_item = 0; | |
8b93c638 JM |
2404 | |
2405 | return var; | |
2406 | } | |
2407 | ||
581e13c1 | 2408 | /* Allocate memory and initialize a new root variable. */ |
8b93c638 JM |
2409 | static struct varobj * |
2410 | new_root_variable (void) | |
2411 | { | |
2412 | struct varobj *var = new_variable (); | |
a109c7c1 | 2413 | |
3e43a32a | 2414 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root)); |
8b93c638 JM |
2415 | var->root->lang = NULL; |
2416 | var->root->exp = NULL; | |
2417 | var->root->valid_block = NULL; | |
7a424e99 | 2418 | var->root->frame = null_frame_id; |
a5defcdc | 2419 | var->root->floating = 0; |
8b93c638 | 2420 | var->root->rootvar = NULL; |
8756216b | 2421 | var->root->is_valid = 1; |
8b93c638 JM |
2422 | |
2423 | return var; | |
2424 | } | |
2425 | ||
581e13c1 | 2426 | /* Free any allocated memory associated with VAR. */ |
8b93c638 | 2427 | static void |
fba45db2 | 2428 | free_variable (struct varobj *var) |
8b93c638 | 2429 | { |
d452c4bc | 2430 | #if HAVE_PYTHON |
bb5ce47a | 2431 | if (var->dynamic->pretty_printer != NULL) |
d452c4bc UW |
2432 | { |
2433 | struct cleanup *cleanup = varobj_ensure_python_env (var); | |
bb5ce47a YQ |
2434 | |
2435 | Py_XDECREF (var->dynamic->constructor); | |
2436 | Py_XDECREF (var->dynamic->pretty_printer); | |
2437 | Py_XDECREF (var->dynamic->child_iter); | |
2438 | Py_XDECREF (var->dynamic->saved_item); | |
d452c4bc UW |
2439 | do_cleanups (cleanup); |
2440 | } | |
2441 | #endif | |
2442 | ||
36746093 JK |
2443 | value_free (var->value); |
2444 | ||
581e13c1 | 2445 | /* Free the expression if this is a root variable. */ |
b2c2bd75 | 2446 | if (is_root_p (var)) |
8b93c638 | 2447 | { |
3038237c | 2448 | xfree (var->root->exp); |
8038e1e2 | 2449 | xfree (var->root); |
8b93c638 JM |
2450 | } |
2451 | ||
8038e1e2 AC |
2452 | xfree (var->name); |
2453 | xfree (var->obj_name); | |
85265413 | 2454 | xfree (var->print_value); |
02142340 | 2455 | xfree (var->path_expr); |
bb5ce47a | 2456 | xfree (var->dynamic); |
8038e1e2 | 2457 | xfree (var); |
8b93c638 JM |
2458 | } |
2459 | ||
74b7792f AC |
2460 | static void |
2461 | do_free_variable_cleanup (void *var) | |
2462 | { | |
2463 | free_variable (var); | |
2464 | } | |
2465 | ||
2466 | static struct cleanup * | |
2467 | make_cleanup_free_variable (struct varobj *var) | |
2468 | { | |
2469 | return make_cleanup (do_free_variable_cleanup, var); | |
2470 | } | |
2471 | ||
581e13c1 | 2472 | /* This returns the type of the variable. It also skips past typedefs |
6766a268 | 2473 | to return the real type of the variable. |
94b66fa7 KS |
2474 | |
2475 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
581e13c1 | 2476 | except within get_target_type and get_type. */ |
8b93c638 | 2477 | static struct type * |
fba45db2 | 2478 | get_type (struct varobj *var) |
8b93c638 JM |
2479 | { |
2480 | struct type *type; | |
8b93c638 | 2481 | |
a109c7c1 | 2482 | type = var->type; |
6766a268 DJ |
2483 | if (type != NULL) |
2484 | type = check_typedef (type); | |
8b93c638 JM |
2485 | |
2486 | return type; | |
2487 | } | |
2488 | ||
6e2a9270 VP |
2489 | /* Return the type of the value that's stored in VAR, |
2490 | or that would have being stored there if the | |
581e13c1 | 2491 | value were accessible. |
6e2a9270 VP |
2492 | |
2493 | This differs from VAR->type in that VAR->type is always | |
2494 | the true type of the expession in the source language. | |
2495 | The return value of this function is the type we're | |
2496 | actually storing in varobj, and using for displaying | |
2497 | the values and for comparing previous and new values. | |
2498 | ||
2499 | For example, top-level references are always stripped. */ | |
2500 | static struct type * | |
2501 | get_value_type (struct varobj *var) | |
2502 | { | |
2503 | struct type *type; | |
2504 | ||
2505 | if (var->value) | |
2506 | type = value_type (var->value); | |
2507 | else | |
2508 | type = var->type; | |
2509 | ||
2510 | type = check_typedef (type); | |
2511 | ||
2512 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
2513 | type = get_target_type (type); | |
2514 | ||
2515 | type = check_typedef (type); | |
2516 | ||
2517 | return type; | |
2518 | } | |
2519 | ||
8b93c638 | 2520 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
2521 | past typedefs, just like get_type (). |
2522 | ||
2523 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
581e13c1 | 2524 | except within get_target_type and get_type. */ |
8b93c638 | 2525 | static struct type * |
fba45db2 | 2526 | get_target_type (struct type *type) |
8b93c638 JM |
2527 | { |
2528 | if (type != NULL) | |
2529 | { | |
2530 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
2531 | if (type != NULL) |
2532 | type = check_typedef (type); | |
8b93c638 JM |
2533 | } |
2534 | ||
2535 | return type; | |
2536 | } | |
2537 | ||
2538 | /* What is the default display for this variable? We assume that | |
581e13c1 | 2539 | everything is "natural". Any exceptions? */ |
8b93c638 | 2540 | static enum varobj_display_formats |
fba45db2 | 2541 | variable_default_display (struct varobj *var) |
8b93c638 JM |
2542 | { |
2543 | return FORMAT_NATURAL; | |
2544 | } | |
2545 | ||
581e13c1 | 2546 | /* FIXME: The following should be generic for any pointer. */ |
8b93c638 | 2547 | static void |
fba45db2 | 2548 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
2549 | { |
2550 | struct cpstack *s; | |
2551 | ||
2552 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
2553 | s->name = name; | |
2554 | s->next = *pstack; | |
2555 | *pstack = s; | |
2556 | } | |
2557 | ||
581e13c1 | 2558 | /* FIXME: The following should be generic for any pointer. */ |
8b93c638 | 2559 | static char * |
fba45db2 | 2560 | cppop (struct cpstack **pstack) |
8b93c638 JM |
2561 | { |
2562 | struct cpstack *s; | |
2563 | char *v; | |
2564 | ||
2565 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
2566 | return NULL; | |
2567 | ||
2568 | s = *pstack; | |
2569 | v = s->name; | |
2570 | *pstack = (*pstack)->next; | |
b8c9b27d | 2571 | xfree (s); |
8b93c638 JM |
2572 | |
2573 | return v; | |
2574 | } | |
2575 | \f | |
2576 | /* | |
2577 | * Language-dependencies | |
2578 | */ | |
2579 | ||
2580 | /* Common entry points */ | |
2581 | ||
581e13c1 | 2582 | /* Get the language of variable VAR. */ |
8b93c638 | 2583 | static enum varobj_languages |
fba45db2 | 2584 | variable_language (struct varobj *var) |
8b93c638 JM |
2585 | { |
2586 | enum varobj_languages lang; | |
2587 | ||
2588 | switch (var->root->exp->language_defn->la_language) | |
2589 | { | |
2590 | default: | |
2591 | case language_c: | |
2592 | lang = vlang_c; | |
2593 | break; | |
2594 | case language_cplus: | |
2595 | lang = vlang_cplus; | |
2596 | break; | |
2597 | case language_java: | |
2598 | lang = vlang_java; | |
2599 | break; | |
40591b7d JCD |
2600 | case language_ada: |
2601 | lang = vlang_ada; | |
2602 | break; | |
8b93c638 JM |
2603 | } |
2604 | ||
2605 | return lang; | |
2606 | } | |
2607 | ||
2608 | /* Return the number of children for a given variable. | |
2609 | The result of this function is defined by the language | |
581e13c1 | 2610 | implementation. The number of children returned by this function |
8b93c638 | 2611 | is the number of children that the user will see in the variable |
581e13c1 | 2612 | display. */ |
8b93c638 | 2613 | static int |
fba45db2 | 2614 | number_of_children (struct varobj *var) |
8b93c638 | 2615 | { |
82ae4854 | 2616 | return (*var->root->lang->number_of_children) (var); |
8b93c638 JM |
2617 | } |
2618 | ||
3e43a32a | 2619 | /* What is the expression for the root varobj VAR? Returns a malloc'd |
581e13c1 | 2620 | string. */ |
8b93c638 | 2621 | static char * |
fba45db2 | 2622 | name_of_variable (struct varobj *var) |
8b93c638 JM |
2623 | { |
2624 | return (*var->root->lang->name_of_variable) (var); | |
2625 | } | |
2626 | ||
3e43a32a | 2627 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd |
581e13c1 | 2628 | string. */ |
8b93c638 | 2629 | static char * |
fba45db2 | 2630 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
2631 | { |
2632 | return (*var->root->lang->name_of_child) (var, index); | |
2633 | } | |
2634 | ||
2213e2be YQ |
2635 | /* If frame associated with VAR can be found, switch |
2636 | to it and return 1. Otherwise, return 0. */ | |
2637 | ||
2638 | static int | |
2639 | check_scope (struct varobj *var) | |
2640 | { | |
2641 | struct frame_info *fi; | |
2642 | int scope; | |
2643 | ||
2644 | fi = frame_find_by_id (var->root->frame); | |
2645 | scope = fi != NULL; | |
2646 | ||
2647 | if (fi) | |
2648 | { | |
2649 | CORE_ADDR pc = get_frame_pc (fi); | |
2650 | ||
2651 | if (pc < BLOCK_START (var->root->valid_block) || | |
2652 | pc >= BLOCK_END (var->root->valid_block)) | |
2653 | scope = 0; | |
2654 | else | |
2655 | select_frame (fi); | |
2656 | } | |
2657 | return scope; | |
2658 | } | |
2659 | ||
2660 | /* Helper function to value_of_root. */ | |
2661 | ||
2662 | static struct value * | |
2663 | value_of_root_1 (struct varobj **var_handle) | |
2664 | { | |
2665 | struct value *new_val = NULL; | |
2666 | struct varobj *var = *var_handle; | |
2667 | int within_scope = 0; | |
2668 | struct cleanup *back_to; | |
2669 | ||
2670 | /* Only root variables can be updated... */ | |
2671 | if (!is_root_p (var)) | |
2672 | /* Not a root var. */ | |
2673 | return NULL; | |
2674 | ||
2675 | back_to = make_cleanup_restore_current_thread (); | |
2676 | ||
2677 | /* Determine whether the variable is still around. */ | |
2678 | if (var->root->valid_block == NULL || var->root->floating) | |
2679 | within_scope = 1; | |
2680 | else if (var->root->thread_id == 0) | |
2681 | { | |
2682 | /* The program was single-threaded when the variable object was | |
2683 | created. Technically, it's possible that the program became | |
2684 | multi-threaded since then, but we don't support such | |
2685 | scenario yet. */ | |
2686 | within_scope = check_scope (var); | |
2687 | } | |
2688 | else | |
2689 | { | |
2690 | ptid_t ptid = thread_id_to_pid (var->root->thread_id); | |
2691 | if (in_thread_list (ptid)) | |
2692 | { | |
2693 | switch_to_thread (ptid); | |
2694 | within_scope = check_scope (var); | |
2695 | } | |
2696 | } | |
2697 | ||
2698 | if (within_scope) | |
2699 | { | |
2700 | volatile struct gdb_exception except; | |
2701 | ||
2702 | /* We need to catch errors here, because if evaluate | |
2703 | expression fails we want to just return NULL. */ | |
2704 | TRY_CATCH (except, RETURN_MASK_ERROR) | |
2705 | { | |
2706 | new_val = evaluate_expression (var->root->exp); | |
2707 | } | |
2708 | } | |
2709 | ||
2710 | do_cleanups (back_to); | |
2711 | ||
2712 | return new_val; | |
2713 | } | |
2714 | ||
a5defcdc VP |
2715 | /* What is the ``struct value *'' of the root variable VAR? |
2716 | For floating variable object, evaluation can get us a value | |
2717 | of different type from what is stored in varobj already. In | |
2718 | that case: | |
2719 | - *type_changed will be set to 1 | |
2720 | - old varobj will be freed, and new one will be | |
2721 | created, with the same name. | |
2722 | - *var_handle will be set to the new varobj | |
2723 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 2724 | static struct value * |
fba45db2 | 2725 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 2726 | { |
73a93a32 JI |
2727 | struct varobj *var; |
2728 | ||
2729 | if (var_handle == NULL) | |
2730 | return NULL; | |
2731 | ||
2732 | var = *var_handle; | |
2733 | ||
2734 | /* This should really be an exception, since this should | |
581e13c1 | 2735 | only get called with a root variable. */ |
73a93a32 | 2736 | |
b2c2bd75 | 2737 | if (!is_root_p (var)) |
73a93a32 JI |
2738 | return NULL; |
2739 | ||
a5defcdc | 2740 | if (var->root->floating) |
73a93a32 JI |
2741 | { |
2742 | struct varobj *tmp_var; | |
2743 | char *old_type, *new_type; | |
6225abfa | 2744 | |
73a93a32 JI |
2745 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
2746 | USE_SELECTED_FRAME); | |
2747 | if (tmp_var == NULL) | |
2748 | { | |
2749 | return NULL; | |
2750 | } | |
6225abfa | 2751 | old_type = varobj_get_type (var); |
73a93a32 | 2752 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 2753 | if (strcmp (old_type, new_type) == 0) |
73a93a32 | 2754 | { |
fcacd99f VP |
2755 | /* The expression presently stored inside var->root->exp |
2756 | remembers the locations of local variables relatively to | |
2757 | the frame where the expression was created (in DWARF location | |
2758 | button, for example). Naturally, those locations are not | |
2759 | correct in other frames, so update the expression. */ | |
2760 | ||
2761 | struct expression *tmp_exp = var->root->exp; | |
a109c7c1 | 2762 | |
fcacd99f VP |
2763 | var->root->exp = tmp_var->root->exp; |
2764 | tmp_var->root->exp = tmp_exp; | |
2765 | ||
73a93a32 JI |
2766 | varobj_delete (tmp_var, NULL, 0); |
2767 | *type_changed = 0; | |
2768 | } | |
2769 | else | |
2770 | { | |
1b36a34b | 2771 | tmp_var->obj_name = xstrdup (var->obj_name); |
0cc7d26f TT |
2772 | tmp_var->from = var->from; |
2773 | tmp_var->to = var->to; | |
a5defcdc VP |
2774 | varobj_delete (var, NULL, 0); |
2775 | ||
73a93a32 JI |
2776 | install_variable (tmp_var); |
2777 | *var_handle = tmp_var; | |
705da579 | 2778 | var = *var_handle; |
73a93a32 JI |
2779 | *type_changed = 1; |
2780 | } | |
74dddad3 MS |
2781 | xfree (old_type); |
2782 | xfree (new_type); | |
73a93a32 JI |
2783 | } |
2784 | else | |
2785 | { | |
2786 | *type_changed = 0; | |
2787 | } | |
2788 | ||
7a290c40 JB |
2789 | { |
2790 | struct value *value; | |
2791 | ||
2213e2be | 2792 | value = value_of_root_1 (var_handle); |
7a290c40 JB |
2793 | if (var->value == NULL || value == NULL) |
2794 | { | |
2795 | /* For root varobj-s, a NULL value indicates a scoping issue. | |
2796 | So, nothing to do in terms of checking for mutations. */ | |
2797 | } | |
2798 | else if (varobj_value_has_mutated (var, value, value_type (value))) | |
2799 | { | |
2800 | /* The type has mutated, so the children are no longer valid. | |
2801 | Just delete them, and tell our caller that the type has | |
2802 | changed. */ | |
2803 | varobj_delete (var, NULL, 1 /* only_children */); | |
2804 | var->num_children = -1; | |
2805 | var->to = -1; | |
2806 | var->from = -1; | |
2807 | *type_changed = 1; | |
2808 | } | |
2809 | return value; | |
2810 | } | |
8b93c638 JM |
2811 | } |
2812 | ||
581e13c1 | 2813 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
30b28db1 | 2814 | static struct value * |
fba45db2 | 2815 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 2816 | { |
30b28db1 | 2817 | struct value *value; |
8b93c638 JM |
2818 | |
2819 | value = (*parent->root->lang->value_of_child) (parent, index); | |
2820 | ||
8b93c638 JM |
2821 | return value; |
2822 | } | |
2823 | ||
581e13c1 | 2824 | /* GDB already has a command called "value_of_variable". Sigh. */ |
8b93c638 | 2825 | static char * |
de051565 | 2826 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2827 | { |
8756216b | 2828 | if (var->root->is_valid) |
0cc7d26f | 2829 | { |
bb5ce47a | 2830 | if (var->dynamic->pretty_printer != NULL) |
0cc7d26f TT |
2831 | return value_get_print_value (var->value, var->format, var); |
2832 | return (*var->root->lang->value_of_variable) (var, format); | |
2833 | } | |
8756216b DP |
2834 | else |
2835 | return NULL; | |
8b93c638 JM |
2836 | } |
2837 | ||
85265413 | 2838 | static char * |
b6313243 | 2839 | value_get_print_value (struct value *value, enum varobj_display_formats format, |
d452c4bc | 2840 | struct varobj *var) |
85265413 | 2841 | { |
57e66780 | 2842 | struct ui_file *stb; |
621c8364 | 2843 | struct cleanup *old_chain; |
ac91cd70 | 2844 | char *thevalue = NULL; |
79a45b7d | 2845 | struct value_print_options opts; |
be759fcf PM |
2846 | struct type *type = NULL; |
2847 | long len = 0; | |
2848 | char *encoding = NULL; | |
2849 | struct gdbarch *gdbarch = NULL; | |
3a182a69 JK |
2850 | /* Initialize it just to avoid a GCC false warning. */ |
2851 | CORE_ADDR str_addr = 0; | |
09ca9e2e | 2852 | int string_print = 0; |
57e66780 DJ |
2853 | |
2854 | if (value == NULL) | |
2855 | return NULL; | |
2856 | ||
621c8364 TT |
2857 | stb = mem_fileopen (); |
2858 | old_chain = make_cleanup_ui_file_delete (stb); | |
2859 | ||
be759fcf | 2860 | gdbarch = get_type_arch (value_type (value)); |
b6313243 | 2861 | #if HAVE_PYTHON |
0646da15 TT |
2862 | if (gdb_python_initialized) |
2863 | { | |
bb5ce47a | 2864 | PyObject *value_formatter = var->dynamic->pretty_printer; |
d452c4bc | 2865 | |
0646da15 | 2866 | varobj_ensure_python_env (var); |
09ca9e2e | 2867 | |
0646da15 TT |
2868 | if (value_formatter) |
2869 | { | |
2870 | /* First check to see if we have any children at all. If so, | |
2871 | we simply return {...}. */ | |
2872 | if (dynamic_varobj_has_child_method (var)) | |
2873 | { | |
2874 | do_cleanups (old_chain); | |
2875 | return xstrdup ("{...}"); | |
2876 | } | |
b6313243 | 2877 | |
0646da15 TT |
2878 | if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst)) |
2879 | { | |
2880 | struct value *replacement; | |
2881 | PyObject *output = NULL; | |
2882 | ||
2883 | output = apply_varobj_pretty_printer (value_formatter, | |
2884 | &replacement, | |
2885 | stb); | |
2886 | ||
2887 | /* If we have string like output ... */ | |
2888 | if (output) | |
2889 | { | |
2890 | make_cleanup_py_decref (output); | |
2891 | ||
2892 | /* If this is a lazy string, extract it. For lazy | |
2893 | strings we always print as a string, so set | |
2894 | string_print. */ | |
2895 | if (gdbpy_is_lazy_string (output)) | |
2896 | { | |
2897 | gdbpy_extract_lazy_string (output, &str_addr, &type, | |
2898 | &len, &encoding); | |
2899 | make_cleanup (free_current_contents, &encoding); | |
2900 | string_print = 1; | |
2901 | } | |
2902 | else | |
2903 | { | |
2904 | /* If it is a regular (non-lazy) string, extract | |
2905 | it and copy the contents into THEVALUE. If the | |
2906 | hint says to print it as a string, set | |
2907 | string_print. Otherwise just return the extracted | |
2908 | string as a value. */ | |
2909 | ||
2910 | char *s = python_string_to_target_string (output); | |
2911 | ||
2912 | if (s) | |
2913 | { | |
2914 | char *hint; | |
2915 | ||
2916 | hint = gdbpy_get_display_hint (value_formatter); | |
2917 | if (hint) | |
2918 | { | |
2919 | if (!strcmp (hint, "string")) | |
2920 | string_print = 1; | |
2921 | xfree (hint); | |
2922 | } | |
2923 | ||
2924 | len = strlen (s); | |
2925 | thevalue = xmemdup (s, len + 1, len + 1); | |
2926 | type = builtin_type (gdbarch)->builtin_char; | |
2927 | xfree (s); | |
2928 | ||
2929 | if (!string_print) | |
2930 | { | |
2931 | do_cleanups (old_chain); | |
2932 | return thevalue; | |
2933 | } | |
2934 | ||
2935 | make_cleanup (xfree, thevalue); | |
2936 | } | |
2937 | else | |
2938 | gdbpy_print_stack (); | |
2939 | } | |
2940 | } | |
2941 | /* If the printer returned a replacement value, set VALUE | |
2942 | to REPLACEMENT. If there is not a replacement value, | |
2943 | just use the value passed to this function. */ | |
2944 | if (replacement) | |
2945 | value = replacement; | |
2946 | } | |
2947 | } | |
2948 | } | |
b6313243 TT |
2949 | #endif |
2950 | ||
79a45b7d TT |
2951 | get_formatted_print_options (&opts, format_code[(int) format]); |
2952 | opts.deref_ref = 0; | |
b6313243 | 2953 | opts.raw = 1; |
00bd41d6 PM |
2954 | |
2955 | /* If the THEVALUE has contents, it is a regular string. */ | |
b6313243 | 2956 | if (thevalue) |
ac91cd70 | 2957 | LA_PRINT_STRING (stb, type, (gdb_byte *) thevalue, len, encoding, 0, &opts); |
09ca9e2e | 2958 | else if (string_print) |
00bd41d6 PM |
2959 | /* Otherwise, if string_print is set, and it is not a regular |
2960 | string, it is a lazy string. */ | |
09ca9e2e | 2961 | val_print_string (type, encoding, str_addr, len, stb, &opts); |
b6313243 | 2962 | else |
00bd41d6 | 2963 | /* All other cases. */ |
b6313243 | 2964 | common_val_print (value, stb, 0, &opts, current_language); |
00bd41d6 | 2965 | |
759ef836 | 2966 | thevalue = ui_file_xstrdup (stb, NULL); |
57e66780 | 2967 | |
85265413 NR |
2968 | do_cleanups (old_chain); |
2969 | return thevalue; | |
2970 | } | |
2971 | ||
340a7723 NR |
2972 | int |
2973 | varobj_editable_p (struct varobj *var) | |
2974 | { | |
2975 | struct type *type; | |
340a7723 NR |
2976 | |
2977 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
2978 | return 0; | |
2979 | ||
2980 | type = get_value_type (var); | |
2981 | ||
2982 | switch (TYPE_CODE (type)) | |
2983 | { | |
2984 | case TYPE_CODE_STRUCT: | |
2985 | case TYPE_CODE_UNION: | |
2986 | case TYPE_CODE_ARRAY: | |
2987 | case TYPE_CODE_FUNC: | |
2988 | case TYPE_CODE_METHOD: | |
2989 | return 0; | |
2990 | break; | |
2991 | ||
2992 | default: | |
2993 | return 1; | |
2994 | break; | |
2995 | } | |
2996 | } | |
2997 | ||
d32cafc7 | 2998 | /* Call VAR's value_is_changeable_p language-specific callback. */ |
acd65feb | 2999 | |
8b93c638 | 3000 | static int |
b2c2bd75 | 3001 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 | 3002 | { |
d32cafc7 | 3003 | return var->root->lang->value_is_changeable_p (var); |
8b93c638 JM |
3004 | } |
3005 | ||
5a413362 VP |
3006 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
3007 | selected frame, and not bound to thread/frame. Such variable objects | |
3008 | are created using '@' as frame specifier to -var-create. */ | |
3009 | int | |
3010 | varobj_floating_p (struct varobj *var) | |
3011 | { | |
3012 | return var->root->floating; | |
3013 | } | |
3014 | ||
2024f65a VP |
3015 | /* Given the value and the type of a variable object, |
3016 | adjust the value and type to those necessary | |
3017 | for getting children of the variable object. | |
3018 | This includes dereferencing top-level references | |
3019 | to all types and dereferencing pointers to | |
581e13c1 | 3020 | structures. |
2024f65a | 3021 | |
8264ba82 AG |
3022 | If LOOKUP_ACTUAL_TYPE is set the enclosing type of the |
3023 | value will be fetched and if it differs from static type | |
3024 | the value will be casted to it. | |
3025 | ||
581e13c1 | 3026 | Both TYPE and *TYPE should be non-null. VALUE |
2024f65a VP |
3027 | can be null if we want to only translate type. |
3028 | *VALUE can be null as well -- if the parent | |
581e13c1 | 3029 | value is not known. |
02142340 VP |
3030 | |
3031 | If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1 | |
b6313243 | 3032 | depending on whether pointer was dereferenced |
02142340 | 3033 | in this function. */ |
2024f65a VP |
3034 | static void |
3035 | adjust_value_for_child_access (struct value **value, | |
02142340 | 3036 | struct type **type, |
8264ba82 AG |
3037 | int *was_ptr, |
3038 | int lookup_actual_type) | |
2024f65a VP |
3039 | { |
3040 | gdb_assert (type && *type); | |
3041 | ||
02142340 VP |
3042 | if (was_ptr) |
3043 | *was_ptr = 0; | |
3044 | ||
2024f65a VP |
3045 | *type = check_typedef (*type); |
3046 | ||
3047 | /* The type of value stored in varobj, that is passed | |
3048 | to us, is already supposed to be | |
3049 | reference-stripped. */ | |
3050 | ||
3051 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
3052 | ||
3053 | /* Pointers to structures are treated just like | |
3054 | structures when accessing children. Don't | |
3055 | dererences pointers to other types. */ | |
3056 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
3057 | { | |
3058 | struct type *target_type = get_target_type (*type); | |
3059 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
3060 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
3061 | { | |
3062 | if (value && *value) | |
3f4178d6 | 3063 | { |
8e7b59a5 | 3064 | volatile struct gdb_exception except; |
a109c7c1 | 3065 | |
8e7b59a5 KS |
3066 | TRY_CATCH (except, RETURN_MASK_ERROR) |
3067 | { | |
3068 | *value = value_ind (*value); | |
3069 | } | |
3070 | ||
3071 | if (except.reason < 0) | |
3f4178d6 DJ |
3072 | *value = NULL; |
3073 | } | |
2024f65a | 3074 | *type = target_type; |
02142340 VP |
3075 | if (was_ptr) |
3076 | *was_ptr = 1; | |
2024f65a VP |
3077 | } |
3078 | } | |
3079 | ||
3080 | /* The 'get_target_type' function calls check_typedef on | |
3081 | result, so we can immediately check type code. No | |
3082 | need to call check_typedef here. */ | |
8264ba82 AG |
3083 | |
3084 | /* Access a real type of the value (if necessary and possible). */ | |
3085 | if (value && *value && lookup_actual_type) | |
3086 | { | |
3087 | struct type *enclosing_type; | |
3088 | int real_type_found = 0; | |
3089 | ||
3090 | enclosing_type = value_actual_type (*value, 1, &real_type_found); | |
3091 | if (real_type_found) | |
3092 | { | |
3093 | *type = enclosing_type; | |
3094 | *value = value_cast (enclosing_type, *value); | |
3095 | } | |
3096 | } | |
2024f65a VP |
3097 | } |
3098 | ||
d32cafc7 JB |
3099 | /* Implement the "value_is_changeable_p" varobj callback for most |
3100 | languages. */ | |
3101 | ||
3102 | static int | |
3103 | default_value_is_changeable_p (struct varobj *var) | |
3104 | { | |
3105 | int r; | |
3106 | struct type *type; | |
3107 | ||
3108 | if (CPLUS_FAKE_CHILD (var)) | |
3109 | return 0; | |
3110 | ||
3111 | type = get_value_type (var); | |
3112 | ||
3113 | switch (TYPE_CODE (type)) | |
3114 | { | |
3115 | case TYPE_CODE_STRUCT: | |
3116 | case TYPE_CODE_UNION: | |
3117 | case TYPE_CODE_ARRAY: | |
3118 | r = 0; | |
3119 | break; | |
3120 | ||
3121 | default: | |
3122 | r = 1; | |
3123 | } | |
3124 | ||
3125 | return r; | |
3126 | } | |
3127 | ||
8b93c638 | 3128 | /* C */ |
d32cafc7 | 3129 | |
8b93c638 | 3130 | static int |
fba45db2 | 3131 | c_number_of_children (struct varobj *var) |
8b93c638 | 3132 | { |
2024f65a VP |
3133 | struct type *type = get_value_type (var); |
3134 | int children = 0; | |
8b93c638 | 3135 | struct type *target; |
8b93c638 | 3136 | |
8264ba82 | 3137 | adjust_value_for_child_access (NULL, &type, NULL, 0); |
8b93c638 | 3138 | target = get_target_type (type); |
8b93c638 JM |
3139 | |
3140 | switch (TYPE_CODE (type)) | |
3141 | { | |
3142 | case TYPE_CODE_ARRAY: | |
3143 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
d78df370 | 3144 | && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
8b93c638 JM |
3145 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
3146 | else | |
74a44383 DJ |
3147 | /* If we don't know how many elements there are, don't display |
3148 | any. */ | |
3149 | children = 0; | |
8b93c638 JM |
3150 | break; |
3151 | ||
3152 | case TYPE_CODE_STRUCT: | |
3153 | case TYPE_CODE_UNION: | |
3154 | children = TYPE_NFIELDS (type); | |
3155 | break; | |
3156 | ||
3157 | case TYPE_CODE_PTR: | |
581e13c1 | 3158 | /* The type here is a pointer to non-struct. Typically, pointers |
2024f65a VP |
3159 | have one child, except for function ptrs, which have no children, |
3160 | and except for void*, as we don't know what to show. | |
3161 | ||
0755e6c1 FN |
3162 | We can show char* so we allow it to be dereferenced. If you decide |
3163 | to test for it, please mind that a little magic is necessary to | |
3164 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
581e13c1 | 3165 | TYPE_NAME == "char". */ |
2024f65a VP |
3166 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
3167 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
3168 | children = 0; | |
3169 | else | |
3170 | children = 1; | |
8b93c638 JM |
3171 | break; |
3172 | ||
3173 | default: | |
581e13c1 | 3174 | /* Other types have no children. */ |
8b93c638 JM |
3175 | break; |
3176 | } | |
3177 | ||
3178 | return children; | |
3179 | } | |
3180 | ||
3181 | static char * | |
fba45db2 | 3182 | c_name_of_variable (struct varobj *parent) |
8b93c638 | 3183 | { |
1b36a34b | 3184 | return xstrdup (parent->name); |
8b93c638 JM |
3185 | } |
3186 | ||
bbec2603 VP |
3187 | /* Return the value of element TYPE_INDEX of a structure |
3188 | value VALUE. VALUE's type should be a structure, | |
581e13c1 | 3189 | or union, or a typedef to struct/union. |
bbec2603 VP |
3190 | |
3191 | Returns NULL if getting the value fails. Never throws. */ | |
3192 | static struct value * | |
3193 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 3194 | { |
bbec2603 VP |
3195 | struct value *result = NULL; |
3196 | volatile struct gdb_exception e; | |
bbec2603 | 3197 | struct type *type = value_type (value); |
a109c7c1 | 3198 | |
bbec2603 VP |
3199 | type = check_typedef (type); |
3200 | ||
3201 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
3202 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 3203 | |
bbec2603 VP |
3204 | TRY_CATCH (e, RETURN_MASK_ERROR) |
3205 | { | |
d6a843b5 | 3206 | if (field_is_static (&TYPE_FIELD (type, type_index))) |
bbec2603 VP |
3207 | result = value_static_field (type, type_index); |
3208 | else | |
3209 | result = value_primitive_field (value, 0, type_index, type); | |
3210 | } | |
3211 | if (e.reason < 0) | |
3212 | { | |
3213 | return NULL; | |
3214 | } | |
3215 | else | |
3216 | { | |
3217 | return result; | |
3218 | } | |
3219 | } | |
3220 | ||
3221 | /* Obtain the information about child INDEX of the variable | |
581e13c1 | 3222 | object PARENT. |
bbec2603 VP |
3223 | If CNAME is not null, sets *CNAME to the name of the child relative |
3224 | to the parent. | |
3225 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
3226 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
3227 | ||
3228 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
3229 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
3230 | to NULL. */ | |
3231 | static void | |
3232 | c_describe_child (struct varobj *parent, int index, | |
02142340 VP |
3233 | char **cname, struct value **cvalue, struct type **ctype, |
3234 | char **cfull_expression) | |
bbec2603 VP |
3235 | { |
3236 | struct value *value = parent->value; | |
2024f65a | 3237 | struct type *type = get_value_type (parent); |
02142340 VP |
3238 | char *parent_expression = NULL; |
3239 | int was_ptr; | |
8e7b59a5 | 3240 | volatile struct gdb_exception except; |
bbec2603 VP |
3241 | |
3242 | if (cname) | |
3243 | *cname = NULL; | |
3244 | if (cvalue) | |
3245 | *cvalue = NULL; | |
3246 | if (ctype) | |
3247 | *ctype = NULL; | |
02142340 VP |
3248 | if (cfull_expression) |
3249 | { | |
3250 | *cfull_expression = NULL; | |
85254831 | 3251 | parent_expression = varobj_get_path_expr (get_path_expr_parent (parent)); |
02142340 | 3252 | } |
8264ba82 | 3253 | adjust_value_for_child_access (&value, &type, &was_ptr, 0); |
bbec2603 | 3254 | |
8b93c638 JM |
3255 | switch (TYPE_CODE (type)) |
3256 | { | |
3257 | case TYPE_CODE_ARRAY: | |
bbec2603 | 3258 | if (cname) |
3e43a32a MS |
3259 | *cname |
3260 | = xstrdup (int_string (index | |
3261 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)), | |
3262 | 10, 1, 0, 0)); | |
bbec2603 VP |
3263 | |
3264 | if (cvalue && value) | |
3265 | { | |
3266 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
a109c7c1 | 3267 | |
8e7b59a5 KS |
3268 | TRY_CATCH (except, RETURN_MASK_ERROR) |
3269 | { | |
3270 | *cvalue = value_subscript (value, real_index); | |
3271 | } | |
bbec2603 VP |
3272 | } |
3273 | ||
3274 | if (ctype) | |
3275 | *ctype = get_target_type (type); | |
3276 | ||
02142340 | 3277 | if (cfull_expression) |
43bbcdc2 PH |
3278 | *cfull_expression = |
3279 | xstrprintf ("(%s)[%s]", parent_expression, | |
3280 | int_string (index | |
3281 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)), | |
3282 | 10, 1, 0, 0)); | |
02142340 VP |
3283 | |
3284 | ||
8b93c638 JM |
3285 | break; |
3286 | ||
3287 | case TYPE_CODE_STRUCT: | |
3288 | case TYPE_CODE_UNION: | |
85254831 | 3289 | { |
0d5cff50 | 3290 | const char *field_name; |
bbec2603 | 3291 | |
85254831 KS |
3292 | /* If the type is anonymous and the field has no name, |
3293 | set an appropriate name. */ | |
3294 | field_name = TYPE_FIELD_NAME (type, index); | |
3295 | if (field_name == NULL || *field_name == '\0') | |
3296 | { | |
3297 | if (cname) | |
3298 | { | |
3299 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, index)) | |
3300 | == TYPE_CODE_STRUCT) | |
3301 | *cname = xstrdup (ANONYMOUS_STRUCT_NAME); | |
3302 | else | |
3303 | *cname = xstrdup (ANONYMOUS_UNION_NAME); | |
3304 | } | |
bbec2603 | 3305 | |
85254831 KS |
3306 | if (cfull_expression) |
3307 | *cfull_expression = xstrdup (""); | |
3308 | } | |
3309 | else | |
3310 | { | |
3311 | if (cname) | |
3312 | *cname = xstrdup (field_name); | |
bbec2603 | 3313 | |
85254831 KS |
3314 | if (cfull_expression) |
3315 | { | |
3316 | char *join = was_ptr ? "->" : "."; | |
a109c7c1 | 3317 | |
85254831 KS |
3318 | *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, |
3319 | join, field_name); | |
3320 | } | |
3321 | } | |
02142340 | 3322 | |
85254831 KS |
3323 | if (cvalue && value) |
3324 | { | |
3325 | /* For C, varobj index is the same as type index. */ | |
3326 | *cvalue = value_struct_element_index (value, index); | |
3327 | } | |
3328 | ||
3329 | if (ctype) | |
3330 | *ctype = TYPE_FIELD_TYPE (type, index); | |
3331 | } | |
8b93c638 JM |
3332 | break; |
3333 | ||
3334 | case TYPE_CODE_PTR: | |
bbec2603 VP |
3335 | if (cname) |
3336 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 3337 | |
bbec2603 | 3338 | if (cvalue && value) |
3f4178d6 | 3339 | { |
8e7b59a5 KS |
3340 | TRY_CATCH (except, RETURN_MASK_ERROR) |
3341 | { | |
3342 | *cvalue = value_ind (value); | |
3343 | } | |
a109c7c1 | 3344 | |
8e7b59a5 | 3345 | if (except.reason < 0) |
3f4178d6 DJ |
3346 | *cvalue = NULL; |
3347 | } | |
bbec2603 | 3348 | |
2024f65a VP |
3349 | /* Don't use get_target_type because it calls |
3350 | check_typedef and here, we want to show the true | |
3351 | declared type of the variable. */ | |
bbec2603 | 3352 | if (ctype) |
2024f65a | 3353 | *ctype = TYPE_TARGET_TYPE (type); |
02142340 VP |
3354 | |
3355 | if (cfull_expression) | |
3356 | *cfull_expression = xstrprintf ("*(%s)", parent_expression); | |
bbec2603 | 3357 | |
8b93c638 JM |
3358 | break; |
3359 | ||
3360 | default: | |
581e13c1 | 3361 | /* This should not happen. */ |
bbec2603 VP |
3362 | if (cname) |
3363 | *cname = xstrdup ("???"); | |
02142340 VP |
3364 | if (cfull_expression) |
3365 | *cfull_expression = xstrdup ("???"); | |
581e13c1 | 3366 | /* Don't set value and type, we don't know then. */ |
8b93c638 | 3367 | } |
bbec2603 | 3368 | } |
8b93c638 | 3369 | |
bbec2603 VP |
3370 | static char * |
3371 | c_name_of_child (struct varobj *parent, int index) | |
3372 | { | |
3373 | char *name; | |
a109c7c1 | 3374 | |
02142340 | 3375 | c_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
3376 | return name; |
3377 | } | |
3378 | ||
02142340 VP |
3379 | static char * |
3380 | c_path_expr_of_child (struct varobj *child) | |
3381 | { | |
3382 | c_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
3383 | &child->path_expr); | |
3384 | return child->path_expr; | |
3385 | } | |
3386 | ||
30b28db1 | 3387 | static struct value * |
fba45db2 | 3388 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 3389 | { |
bbec2603 | 3390 | struct value *value = NULL; |
8b93c638 | 3391 | |
a109c7c1 | 3392 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
3393 | return value; |
3394 | } | |
3395 | ||
3396 | static struct type * | |
fba45db2 | 3397 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 3398 | { |
bbec2603 | 3399 | struct type *type = NULL; |
a109c7c1 | 3400 | |
02142340 | 3401 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
3402 | return type; |
3403 | } | |
3404 | ||
8b93c638 | 3405 | static char * |
de051565 | 3406 | c_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 3407 | { |
14b3d9c9 JB |
3408 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
3409 | it will print out its children instead of "{...}". So we need to | |
3410 | catch that case explicitly. */ | |
3411 | struct type *type = get_type (var); | |
e64d9b3d | 3412 | |
581e13c1 | 3413 | /* Strip top-level references. */ |
14b3d9c9 JB |
3414 | while (TYPE_CODE (type) == TYPE_CODE_REF) |
3415 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
3416 | ||
3417 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
3418 | { |
3419 | case TYPE_CODE_STRUCT: | |
3420 | case TYPE_CODE_UNION: | |
3421 | return xstrdup ("{...}"); | |
3422 | /* break; */ | |
3423 | ||
3424 | case TYPE_CODE_ARRAY: | |
3425 | { | |
e64d9b3d | 3426 | char *number; |
a109c7c1 | 3427 | |
b435e160 | 3428 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 3429 | return (number); |
8b93c638 JM |
3430 | } |
3431 | /* break; */ | |
3432 | ||
3433 | default: | |
3434 | { | |
575bbeb6 KS |
3435 | if (var->value == NULL) |
3436 | { | |
3437 | /* This can happen if we attempt to get the value of a struct | |
581e13c1 MS |
3438 | member when the parent is an invalid pointer. This is an |
3439 | error condition, so we should tell the caller. */ | |
575bbeb6 KS |
3440 | return NULL; |
3441 | } | |
3442 | else | |
3443 | { | |
25d5ea92 VP |
3444 | if (var->not_fetched && value_lazy (var->value)) |
3445 | /* Frozen variable and no value yet. We don't | |
3446 | implicitly fetch the value. MI response will | |
3447 | use empty string for the value, which is OK. */ | |
3448 | return NULL; | |
3449 | ||
b2c2bd75 | 3450 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 3451 | gdb_assert (!value_lazy (var->value)); |
de051565 MK |
3452 | |
3453 | /* If the specified format is the current one, | |
581e13c1 | 3454 | we can reuse print_value. */ |
de051565 MK |
3455 | if (format == var->format) |
3456 | return xstrdup (var->print_value); | |
3457 | else | |
d452c4bc | 3458 | return value_get_print_value (var->value, format, var); |
85265413 | 3459 | } |
e64d9b3d | 3460 | } |
8b93c638 JM |
3461 | } |
3462 | } | |
3463 | \f | |
3464 | ||
3465 | /* C++ */ | |
3466 | ||
3467 | static int | |
fba45db2 | 3468 | cplus_number_of_children (struct varobj *var) |
8b93c638 | 3469 | { |
8264ba82 | 3470 | struct value *value = NULL; |
8b93c638 JM |
3471 | struct type *type; |
3472 | int children, dont_know; | |
8264ba82 AG |
3473 | int lookup_actual_type = 0; |
3474 | struct value_print_options opts; | |
8b93c638 JM |
3475 | |
3476 | dont_know = 1; | |
3477 | children = 0; | |
3478 | ||
8264ba82 AG |
3479 | get_user_print_options (&opts); |
3480 | ||
8b93c638 JM |
3481 | if (!CPLUS_FAKE_CHILD (var)) |
3482 | { | |
2024f65a | 3483 | type = get_value_type (var); |
8264ba82 AG |
3484 | |
3485 | /* It is necessary to access a real type (via RTTI). */ | |
3486 | if (opts.objectprint) | |
3487 | { | |
3488 | value = var->value; | |
3489 | lookup_actual_type = (TYPE_CODE (var->type) == TYPE_CODE_REF | |
3490 | || TYPE_CODE (var->type) == TYPE_CODE_PTR); | |
3491 | } | |
3492 | adjust_value_for_child_access (&value, &type, NULL, lookup_actual_type); | |
8b93c638 JM |
3493 | |
3494 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 3495 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
3496 | { |
3497 | int kids[3]; | |
3498 | ||
3499 | cplus_class_num_children (type, kids); | |
3500 | if (kids[v_public] != 0) | |
3501 | children++; | |
3502 | if (kids[v_private] != 0) | |
3503 | children++; | |
3504 | if (kids[v_protected] != 0) | |
3505 | children++; | |
3506 | ||
581e13c1 | 3507 | /* Add any baseclasses. */ |
8b93c638 JM |
3508 | children += TYPE_N_BASECLASSES (type); |
3509 | dont_know = 0; | |
3510 | ||
581e13c1 | 3511 | /* FIXME: save children in var. */ |
8b93c638 JM |
3512 | } |
3513 | } | |
3514 | else | |
3515 | { | |
3516 | int kids[3]; | |
3517 | ||
2024f65a | 3518 | type = get_value_type (var->parent); |
8264ba82 AG |
3519 | |
3520 | /* It is necessary to access a real type (via RTTI). */ | |
3521 | if (opts.objectprint) | |
3522 | { | |
3523 | struct varobj *parent = var->parent; | |
3524 | ||
3525 | value = parent->value; | |
3526 | lookup_actual_type = (TYPE_CODE (parent->type) == TYPE_CODE_REF | |
3527 | || TYPE_CODE (parent->type) == TYPE_CODE_PTR); | |
3528 | } | |
3529 | adjust_value_for_child_access (&value, &type, NULL, lookup_actual_type); | |
8b93c638 JM |
3530 | |
3531 | cplus_class_num_children (type, kids); | |
6e382aa3 | 3532 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 3533 | children = kids[v_public]; |
6e382aa3 | 3534 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
3535 | children = kids[v_private]; |
3536 | else | |
3537 | children = kids[v_protected]; | |
3538 | dont_know = 0; | |
3539 | } | |
3540 | ||
3541 | if (dont_know) | |
3542 | children = c_number_of_children (var); | |
3543 | ||
3544 | return children; | |
3545 | } | |
3546 | ||
3547 | /* Compute # of public, private, and protected variables in this class. | |
3548 | That means we need to descend into all baseclasses and find out | |
581e13c1 | 3549 | how many are there, too. */ |
8b93c638 | 3550 | static void |
1669605f | 3551 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 | 3552 | { |
d48cc9dd DJ |
3553 | int i, vptr_fieldno; |
3554 | struct type *basetype = NULL; | |
8b93c638 JM |
3555 | |
3556 | children[v_public] = 0; | |
3557 | children[v_private] = 0; | |
3558 | children[v_protected] = 0; | |
3559 | ||
d48cc9dd | 3560 | vptr_fieldno = get_vptr_fieldno (type, &basetype); |
8b93c638 JM |
3561 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) |
3562 | { | |
d48cc9dd DJ |
3563 | /* If we have a virtual table pointer, omit it. Even if virtual |
3564 | table pointers are not specifically marked in the debug info, | |
3565 | they should be artificial. */ | |
3566 | if ((type == basetype && i == vptr_fieldno) | |
3567 | || TYPE_FIELD_ARTIFICIAL (type, i)) | |
8b93c638 JM |
3568 | continue; |
3569 | ||
3570 | if (TYPE_FIELD_PROTECTED (type, i)) | |
3571 | children[v_protected]++; | |
3572 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
3573 | children[v_private]++; | |
3574 | else | |
3575 | children[v_public]++; | |
3576 | } | |
3577 | } | |
3578 | ||
3579 | static char * | |
fba45db2 | 3580 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
3581 | { |
3582 | return c_name_of_variable (parent); | |
3583 | } | |
3584 | ||
2024f65a VP |
3585 | enum accessibility { private_field, protected_field, public_field }; |
3586 | ||
3587 | /* Check if field INDEX of TYPE has the specified accessibility. | |
3588 | Return 0 if so and 1 otherwise. */ | |
3589 | static int | |
3590 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 3591 | { |
2024f65a VP |
3592 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
3593 | return 1; | |
3594 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
3595 | return 1; | |
3596 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
3597 | && !TYPE_FIELD_PROTECTED (type, index)) | |
3598 | return 1; | |
3599 | else | |
3600 | return 0; | |
3601 | } | |
3602 | ||
3603 | static void | |
3604 | cplus_describe_child (struct varobj *parent, int index, | |
02142340 VP |
3605 | char **cname, struct value **cvalue, struct type **ctype, |
3606 | char **cfull_expression) | |
2024f65a | 3607 | { |
2024f65a | 3608 | struct value *value; |
8b93c638 | 3609 | struct type *type; |
02142340 | 3610 | int was_ptr; |
8264ba82 | 3611 | int lookup_actual_type = 0; |
02142340 | 3612 | char *parent_expression = NULL; |
8264ba82 AG |
3613 | struct varobj *var; |
3614 | struct value_print_options opts; | |
8b93c638 | 3615 | |
2024f65a VP |
3616 | if (cname) |
3617 | *cname = NULL; | |
3618 | if (cvalue) | |
3619 | *cvalue = NULL; | |
3620 | if (ctype) | |
3621 | *ctype = NULL; | |
02142340 VP |
3622 | if (cfull_expression) |
3623 | *cfull_expression = NULL; | |
2024f65a | 3624 | |
8264ba82 AG |
3625 | get_user_print_options (&opts); |
3626 | ||
3627 | var = (CPLUS_FAKE_CHILD (parent)) ? parent->parent : parent; | |
3628 | if (opts.objectprint) | |
3629 | lookup_actual_type = (TYPE_CODE (var->type) == TYPE_CODE_REF | |
3630 | || TYPE_CODE (var->type) == TYPE_CODE_PTR); | |
3631 | value = var->value; | |
3632 | type = get_value_type (var); | |
3633 | if (cfull_expression) | |
3634 | parent_expression = varobj_get_path_expr (get_path_expr_parent (var)); | |
8b93c638 | 3635 | |
8264ba82 | 3636 | adjust_value_for_child_access (&value, &type, &was_ptr, lookup_actual_type); |
2024f65a VP |
3637 | |
3638 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
3f4178d6 | 3639 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
8b93c638 | 3640 | { |
02142340 | 3641 | char *join = was_ptr ? "->" : "."; |
a109c7c1 | 3642 | |
8b93c638 JM |
3643 | if (CPLUS_FAKE_CHILD (parent)) |
3644 | { | |
6e382aa3 JJ |
3645 | /* The fields of the class type are ordered as they |
3646 | appear in the class. We are given an index for a | |
3647 | particular access control type ("public","protected", | |
3648 | or "private"). We must skip over fields that don't | |
3649 | have the access control we are looking for to properly | |
581e13c1 | 3650 | find the indexed field. */ |
6e382aa3 | 3651 | int type_index = TYPE_N_BASECLASSES (type); |
2024f65a | 3652 | enum accessibility acc = public_field; |
d48cc9dd DJ |
3653 | int vptr_fieldno; |
3654 | struct type *basetype = NULL; | |
0d5cff50 | 3655 | const char *field_name; |
d48cc9dd DJ |
3656 | |
3657 | vptr_fieldno = get_vptr_fieldno (type, &basetype); | |
6e382aa3 | 3658 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 3659 | acc = private_field; |
6e382aa3 | 3660 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
3661 | acc = protected_field; |
3662 | ||
3663 | while (index >= 0) | |
6e382aa3 | 3664 | { |
d48cc9dd DJ |
3665 | if ((type == basetype && type_index == vptr_fieldno) |
3666 | || TYPE_FIELD_ARTIFICIAL (type, type_index)) | |
2024f65a VP |
3667 | ; /* ignore vptr */ |
3668 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
3669 | --index; |
3670 | ++type_index; | |
6e382aa3 | 3671 | } |
2024f65a VP |
3672 | --type_index; |
3673 | ||
85254831 KS |
3674 | /* If the type is anonymous and the field has no name, |
3675 | set an appopriate name. */ | |
3676 | field_name = TYPE_FIELD_NAME (type, type_index); | |
3677 | if (field_name == NULL || *field_name == '\0') | |
3678 | { | |
3679 | if (cname) | |
3680 | { | |
3681 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, type_index)) | |
3682 | == TYPE_CODE_STRUCT) | |
3683 | *cname = xstrdup (ANONYMOUS_STRUCT_NAME); | |
3684 | else if (TYPE_CODE (TYPE_FIELD_TYPE (type, type_index)) | |
3685 | == TYPE_CODE_UNION) | |
3686 | *cname = xstrdup (ANONYMOUS_UNION_NAME); | |
3687 | } | |
3688 | ||
3689 | if (cfull_expression) | |
3690 | *cfull_expression = xstrdup (""); | |
3691 | } | |
3692 | else | |
3693 | { | |
3694 | if (cname) | |
3695 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
3696 | ||
3697 | if (cfull_expression) | |
3698 | *cfull_expression | |
3699 | = xstrprintf ("((%s)%s%s)", parent_expression, join, | |
3700 | field_name); | |
3701 | } | |
2024f65a VP |
3702 | |
3703 | if (cvalue && value) | |
3704 | *cvalue = value_struct_element_index (value, type_index); | |
3705 | ||
3706 | if (ctype) | |
3707 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
3708 | } | |
3709 | else if (index < TYPE_N_BASECLASSES (type)) | |
3710 | { | |
3711 | /* This is a baseclass. */ | |
3712 | if (cname) | |
3713 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
3714 | ||
3715 | if (cvalue && value) | |
0cc7d26f | 3716 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
6e382aa3 | 3717 | |
2024f65a VP |
3718 | if (ctype) |
3719 | { | |
3720 | *ctype = TYPE_FIELD_TYPE (type, index); | |
3721 | } | |
02142340 VP |
3722 | |
3723 | if (cfull_expression) | |
3724 | { | |
3725 | char *ptr = was_ptr ? "*" : ""; | |
a109c7c1 | 3726 | |
581e13c1 | 3727 | /* Cast the parent to the base' type. Note that in gdb, |
02142340 VP |
3728 | expression like |
3729 | (Base1)d | |
3730 | will create an lvalue, for all appearences, so we don't | |
3731 | need to use more fancy: | |
3732 | *(Base1*)(&d) | |
0d932b2f MK |
3733 | construct. |
3734 | ||
3735 | When we are in the scope of the base class or of one | |
3736 | of its children, the type field name will be interpreted | |
3737 | as a constructor, if it exists. Therefore, we must | |
3738 | indicate that the name is a class name by using the | |
3739 | 'class' keyword. See PR mi/11912 */ | |
3740 | *cfull_expression = xstrprintf ("(%s(class %s%s) %s)", | |
02142340 VP |
3741 | ptr, |
3742 | TYPE_FIELD_NAME (type, index), | |
3743 | ptr, | |
3744 | parent_expression); | |
3745 | } | |
8b93c638 | 3746 | } |
8b93c638 JM |
3747 | else |
3748 | { | |
348144ba | 3749 | char *access = NULL; |
6e382aa3 | 3750 | int children[3]; |
a109c7c1 | 3751 | |
2024f65a | 3752 | cplus_class_num_children (type, children); |
6e382aa3 | 3753 | |
8b93c638 | 3754 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
3755 | only be "public", "private", or "protected" |
3756 | ||
3757 | The special "fake" children are always output by varobj in | |
581e13c1 | 3758 | this order. So if INDEX == 2, it MUST be "protected". */ |
8b93c638 JM |
3759 | index -= TYPE_N_BASECLASSES (type); |
3760 | switch (index) | |
3761 | { | |
3762 | case 0: | |
6e382aa3 | 3763 | if (children[v_public] > 0) |
2024f65a | 3764 | access = "public"; |
6e382aa3 | 3765 | else if (children[v_private] > 0) |
2024f65a | 3766 | access = "private"; |
6e382aa3 | 3767 | else |
2024f65a | 3768 | access = "protected"; |
6e382aa3 | 3769 | break; |
8b93c638 | 3770 | case 1: |
6e382aa3 | 3771 | if (children[v_public] > 0) |
8b93c638 | 3772 | { |
6e382aa3 | 3773 | if (children[v_private] > 0) |
2024f65a | 3774 | access = "private"; |
6e382aa3 | 3775 | else |
2024f65a | 3776 | access = "protected"; |
8b93c638 | 3777 | } |
6e382aa3 | 3778 | else if (children[v_private] > 0) |
2024f65a | 3779 | access = "protected"; |
6e382aa3 | 3780 | break; |
8b93c638 | 3781 | case 2: |
581e13c1 | 3782 | /* Must be protected. */ |
2024f65a | 3783 | access = "protected"; |
6e382aa3 | 3784 | break; |
8b93c638 | 3785 | default: |
581e13c1 | 3786 | /* error! */ |
8b93c638 JM |
3787 | break; |
3788 | } | |
348144ba MS |
3789 | |
3790 | gdb_assert (access); | |
2024f65a VP |
3791 | if (cname) |
3792 | *cname = xstrdup (access); | |
8b93c638 | 3793 | |
02142340 | 3794 | /* Value and type and full expression are null here. */ |
2024f65a | 3795 | } |
8b93c638 | 3796 | } |
8b93c638 JM |
3797 | else |
3798 | { | |
02142340 | 3799 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
2024f65a VP |
3800 | } |
3801 | } | |
8b93c638 | 3802 | |
2024f65a VP |
3803 | static char * |
3804 | cplus_name_of_child (struct varobj *parent, int index) | |
3805 | { | |
3806 | char *name = NULL; | |
a109c7c1 | 3807 | |
02142340 | 3808 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
3809 | return name; |
3810 | } | |
3811 | ||
02142340 VP |
3812 | static char * |
3813 | cplus_path_expr_of_child (struct varobj *child) | |
3814 | { | |
3815 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
3816 | &child->path_expr); | |
3817 | return child->path_expr; | |
3818 | } | |
3819 | ||
30b28db1 | 3820 | static struct value * |
fba45db2 | 3821 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 3822 | { |
2024f65a | 3823 | struct value *value = NULL; |
a109c7c1 | 3824 | |
02142340 | 3825 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
3826 | return value; |
3827 | } | |
3828 | ||
3829 | static struct type * | |
fba45db2 | 3830 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 3831 | { |
2024f65a | 3832 | struct type *type = NULL; |
a109c7c1 | 3833 | |
02142340 | 3834 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
3835 | return type; |
3836 | } | |
3837 | ||
8b93c638 | 3838 | static char * |
a109c7c1 MS |
3839 | cplus_value_of_variable (struct varobj *var, |
3840 | enum varobj_display_formats format) | |
8b93c638 JM |
3841 | { |
3842 | ||
3843 | /* If we have one of our special types, don't print out | |
581e13c1 | 3844 | any value. */ |
8b93c638 JM |
3845 | if (CPLUS_FAKE_CHILD (var)) |
3846 | return xstrdup (""); | |
3847 | ||
de051565 | 3848 | return c_value_of_variable (var, format); |
8b93c638 JM |
3849 | } |
3850 | \f | |
3851 | /* Java */ | |
3852 | ||
3853 | static int | |
fba45db2 | 3854 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
3855 | { |
3856 | return cplus_number_of_children (var); | |
3857 | } | |
3858 | ||
3859 | static char * | |
fba45db2 | 3860 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
3861 | { |
3862 | char *p, *name; | |
3863 | ||
3864 | name = cplus_name_of_variable (parent); | |
3865 | /* If the name has "-" in it, it is because we | |
581e13c1 | 3866 | needed to escape periods in the name... */ |
8b93c638 JM |
3867 | p = name; |
3868 | ||
3869 | while (*p != '\000') | |
3870 | { | |
3871 | if (*p == '-') | |
3872 | *p = '.'; | |
3873 | p++; | |
3874 | } | |
3875 | ||
3876 | return name; | |
3877 | } | |
3878 | ||
3879 | static char * | |
fba45db2 | 3880 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3881 | { |
3882 | char *name, *p; | |
3883 | ||
3884 | name = cplus_name_of_child (parent, index); | |
581e13c1 | 3885 | /* Escape any periods in the name... */ |
8b93c638 JM |
3886 | p = name; |
3887 | ||
3888 | while (*p != '\000') | |
3889 | { | |
3890 | if (*p == '.') | |
3891 | *p = '-'; | |
3892 | p++; | |
3893 | } | |
3894 | ||
3895 | return name; | |
3896 | } | |
3897 | ||
02142340 VP |
3898 | static char * |
3899 | java_path_expr_of_child (struct varobj *child) | |
3900 | { | |
3901 | return NULL; | |
3902 | } | |
3903 | ||
30b28db1 | 3904 | static struct value * |
fba45db2 | 3905 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3906 | { |
3907 | return cplus_value_of_child (parent, index); | |
3908 | } | |
3909 | ||
3910 | static struct type * | |
fba45db2 | 3911 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3912 | { |
3913 | return cplus_type_of_child (parent, index); | |
3914 | } | |
3915 | ||
8b93c638 | 3916 | static char * |
de051565 | 3917 | java_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 3918 | { |
de051565 | 3919 | return cplus_value_of_variable (var, format); |
8b93c638 | 3920 | } |
54333c3b | 3921 | |
40591b7d JCD |
3922 | /* Ada specific callbacks for VAROBJs. */ |
3923 | ||
3924 | static int | |
3925 | ada_number_of_children (struct varobj *var) | |
3926 | { | |
181875a4 | 3927 | return ada_varobj_get_number_of_children (var->value, var->type); |
40591b7d JCD |
3928 | } |
3929 | ||
3930 | static char * | |
3931 | ada_name_of_variable (struct varobj *parent) | |
3932 | { | |
3933 | return c_name_of_variable (parent); | |
3934 | } | |
3935 | ||
3936 | static char * | |
3937 | ada_name_of_child (struct varobj *parent, int index) | |
3938 | { | |
181875a4 JB |
3939 | return ada_varobj_get_name_of_child (parent->value, parent->type, |
3940 | parent->name, index); | |
40591b7d JCD |
3941 | } |
3942 | ||
3943 | static char* | |
3944 | ada_path_expr_of_child (struct varobj *child) | |
3945 | { | |
181875a4 JB |
3946 | struct varobj *parent = child->parent; |
3947 | const char *parent_path_expr = varobj_get_path_expr (parent); | |
3948 | ||
3949 | return ada_varobj_get_path_expr_of_child (parent->value, | |
3950 | parent->type, | |
3951 | parent->name, | |
3952 | parent_path_expr, | |
3953 | child->index); | |
40591b7d JCD |
3954 | } |
3955 | ||
40591b7d JCD |
3956 | static struct value * |
3957 | ada_value_of_child (struct varobj *parent, int index) | |
3958 | { | |
181875a4 JB |
3959 | return ada_varobj_get_value_of_child (parent->value, parent->type, |
3960 | parent->name, index); | |
40591b7d JCD |
3961 | } |
3962 | ||
3963 | static struct type * | |
3964 | ada_type_of_child (struct varobj *parent, int index) | |
3965 | { | |
181875a4 JB |
3966 | return ada_varobj_get_type_of_child (parent->value, parent->type, |
3967 | index); | |
40591b7d JCD |
3968 | } |
3969 | ||
3970 | static char * | |
3971 | ada_value_of_variable (struct varobj *var, enum varobj_display_formats format) | |
3972 | { | |
181875a4 JB |
3973 | struct value_print_options opts; |
3974 | ||
3975 | get_formatted_print_options (&opts, format_code[(int) format]); | |
3976 | opts.deref_ref = 0; | |
3977 | opts.raw = 1; | |
3978 | ||
3979 | return ada_varobj_get_value_of_variable (var->value, var->type, &opts); | |
40591b7d JCD |
3980 | } |
3981 | ||
d32cafc7 JB |
3982 | /* Implement the "value_is_changeable_p" routine for Ada. */ |
3983 | ||
3984 | static int | |
3985 | ada_value_is_changeable_p (struct varobj *var) | |
3986 | { | |
3987 | struct type *type = var->value ? value_type (var->value) : var->type; | |
3988 | ||
3989 | if (ada_is_array_descriptor_type (type) | |
3990 | && TYPE_CODE (type) == TYPE_CODE_TYPEDEF) | |
3991 | { | |
3992 | /* This is in reality a pointer to an unconstrained array. | |
3993 | its value is changeable. */ | |
3994 | return 1; | |
3995 | } | |
3996 | ||
3997 | if (ada_is_string_type (type)) | |
3998 | { | |
3999 | /* We display the contents of the string in the array's | |
4000 | "value" field. The contents can change, so consider | |
4001 | that the array is changeable. */ | |
4002 | return 1; | |
4003 | } | |
4004 | ||
4005 | return default_value_is_changeable_p (var); | |
4006 | } | |
4007 | ||
7a290c40 JB |
4008 | /* Implement the "value_has_mutated" routine for Ada. */ |
4009 | ||
4010 | static int | |
4011 | ada_value_has_mutated (struct varobj *var, struct value *new_val, | |
4012 | struct type *new_type) | |
4013 | { | |
181875a4 JB |
4014 | int i; |
4015 | int from = -1; | |
4016 | int to = -1; | |
4017 | ||
4018 | /* If the number of fields have changed, then for sure the type | |
4019 | has mutated. */ | |
4020 | if (ada_varobj_get_number_of_children (new_val, new_type) | |
4021 | != var->num_children) | |
4022 | return 1; | |
4023 | ||
4024 | /* If the number of fields have remained the same, then we need | |
4025 | to check the name of each field. If they remain the same, | |
4026 | then chances are the type hasn't mutated. This is technically | |
4027 | an incomplete test, as the child's type might have changed | |
4028 | despite the fact that the name remains the same. But we'll | |
4029 | handle this situation by saying that the child has mutated, | |
4030 | not this value. | |
4031 | ||
4032 | If only part (or none!) of the children have been fetched, | |
4033 | then only check the ones we fetched. It does not matter | |
4034 | to the frontend whether a child that it has not fetched yet | |
4035 | has mutated or not. So just assume it hasn't. */ | |
4036 | ||
4037 | restrict_range (var->children, &from, &to); | |
4038 | for (i = from; i < to; i++) | |
4039 | if (strcmp (ada_varobj_get_name_of_child (new_val, new_type, | |
4040 | var->name, i), | |
4041 | VEC_index (varobj_p, var->children, i)->name) != 0) | |
4042 | return 1; | |
4043 | ||
7a290c40 JB |
4044 | return 0; |
4045 | } | |
4046 | ||
54333c3b JK |
4047 | /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them |
4048 | with an arbitrary caller supplied DATA pointer. */ | |
4049 | ||
4050 | void | |
4051 | all_root_varobjs (void (*func) (struct varobj *var, void *data), void *data) | |
4052 | { | |
4053 | struct varobj_root *var_root, *var_root_next; | |
4054 | ||
4055 | /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */ | |
4056 | ||
4057 | for (var_root = rootlist; var_root != NULL; var_root = var_root_next) | |
4058 | { | |
4059 | var_root_next = var_root->next; | |
4060 | ||
4061 | (*func) (var_root->rootvar, data); | |
4062 | } | |
4063 | } | |
8b93c638 JM |
4064 | \f |
4065 | extern void _initialize_varobj (void); | |
4066 | void | |
4067 | _initialize_varobj (void) | |
4068 | { | |
4069 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
4070 | ||
4071 | varobj_table = xmalloc (sizeof_table); | |
4072 | memset (varobj_table, 0, sizeof_table); | |
4073 | ||
ccce17b0 YQ |
4074 | add_setshow_zuinteger_cmd ("debugvarobj", class_maintenance, |
4075 | &varobjdebug, | |
4076 | _("Set varobj debugging."), | |
4077 | _("Show varobj debugging."), | |
4078 | _("When non-zero, varobj debugging is enabled."), | |
4079 | NULL, show_varobjdebug, | |
4080 | &setlist, &showlist); | |
8b93c638 | 4081 | } |
8756216b | 4082 | |
54333c3b | 4083 | /* Invalidate varobj VAR if it is tied to locals and re-create it if it is |
4e969b4f AB |
4084 | defined on globals. It is a helper for varobj_invalidate. |
4085 | ||
4086 | This function is called after changing the symbol file, in this case the | |
4087 | pointers to "struct type" stored by the varobj are no longer valid. All | |
4088 | varobj must be either re-evaluated, or marked as invalid here. */ | |
2dbd25e5 | 4089 | |
54333c3b JK |
4090 | static void |
4091 | varobj_invalidate_iter (struct varobj *var, void *unused) | |
8756216b | 4092 | { |
4e969b4f AB |
4093 | /* global and floating var must be re-evaluated. */ |
4094 | if (var->root->floating || var->root->valid_block == NULL) | |
2dbd25e5 | 4095 | { |
54333c3b | 4096 | struct varobj *tmp_var; |
2dbd25e5 | 4097 | |
54333c3b JK |
4098 | /* Try to create a varobj with same expression. If we succeed |
4099 | replace the old varobj, otherwise invalidate it. */ | |
4100 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
4101 | USE_CURRENT_FRAME); | |
4102 | if (tmp_var != NULL) | |
4103 | { | |
4104 | tmp_var->obj_name = xstrdup (var->obj_name); | |
4105 | varobj_delete (var, NULL, 0); | |
4106 | install_variable (tmp_var); | |
2dbd25e5 | 4107 | } |
54333c3b JK |
4108 | else |
4109 | var->root->is_valid = 0; | |
2dbd25e5 | 4110 | } |
54333c3b JK |
4111 | else /* locals must be invalidated. */ |
4112 | var->root->is_valid = 0; | |
4113 | } | |
4114 | ||
4115 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
4116 | are defined on globals. | |
4117 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
4118 | ||
4119 | void | |
4120 | varobj_invalidate (void) | |
4121 | { | |
4122 | all_root_varobjs (varobj_invalidate_iter, NULL); | |
8756216b | 4123 | } |