Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
0fb0cc75 | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
7b6bb8da | 4 | 2009, 2010, 2011 Free Software Foundation, Inc. |
8b93c638 JM |
5 | |
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
8b93c638 JM |
9 | (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8b93c638 JM |
18 | |
19 | #include "defs.h" | |
a6c442d8 | 20 | #include "exceptions.h" |
8b93c638 JM |
21 | #include "value.h" |
22 | #include "expression.h" | |
23 | #include "frame.h" | |
8b93c638 JM |
24 | #include "language.h" |
25 | #include "wrapper.h" | |
26 | #include "gdbcmd.h" | |
d2353924 | 27 | #include "block.h" |
79a45b7d | 28 | #include "valprint.h" |
a6c442d8 MK |
29 | |
30 | #include "gdb_assert.h" | |
b66d6d2e | 31 | #include "gdb_string.h" |
0cc7d26f | 32 | #include "gdb_regex.h" |
8b93c638 JM |
33 | |
34 | #include "varobj.h" | |
28335dcc | 35 | #include "vec.h" |
6208b47d VP |
36 | #include "gdbthread.h" |
37 | #include "inferior.h" | |
8b93c638 | 38 | |
b6313243 TT |
39 | #if HAVE_PYTHON |
40 | #include "python/python.h" | |
41 | #include "python/python-internal.h" | |
50389644 PA |
42 | #else |
43 | typedef int PyObject; | |
b6313243 TT |
44 | #endif |
45 | ||
8b93c638 JM |
46 | /* Non-zero if we want to see trace of varobj level stuff. */ |
47 | ||
48 | int varobjdebug = 0; | |
920d2a44 AC |
49 | static void |
50 | show_varobjdebug (struct ui_file *file, int from_tty, | |
51 | struct cmd_list_element *c, const char *value) | |
52 | { | |
53 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
54 | } | |
8b93c638 | 55 | |
581e13c1 | 56 | /* String representations of gdb's format codes. */ |
8b93c638 | 57 | char *varobj_format_string[] = |
72330bd6 | 58 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 | 59 | |
581e13c1 | 60 | /* String representations of gdb's known languages. */ |
72330bd6 | 61 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 | 62 | |
0cc7d26f TT |
63 | /* True if we want to allow Python-based pretty-printing. */ |
64 | static int pretty_printing = 0; | |
65 | ||
66 | void | |
67 | varobj_enable_pretty_printing (void) | |
68 | { | |
69 | pretty_printing = 1; | |
70 | } | |
71 | ||
8b93c638 JM |
72 | /* Data structures */ |
73 | ||
74 | /* Every root variable has one of these structures saved in its | |
581e13c1 | 75 | varobj. Members which must be free'd are noted. */ |
8b93c638 | 76 | struct varobj_root |
72330bd6 | 77 | { |
8b93c638 | 78 | |
581e13c1 | 79 | /* Alloc'd expression for this parent. */ |
72330bd6 | 80 | struct expression *exp; |
8b93c638 | 81 | |
581e13c1 | 82 | /* Block for which this expression is valid. */ |
72330bd6 | 83 | struct block *valid_block; |
8b93c638 | 84 | |
44a67aa7 VP |
85 | /* The frame for this expression. This field is set iff valid_block is |
86 | not NULL. */ | |
e64d9b3d | 87 | struct frame_id frame; |
8b93c638 | 88 | |
c5b48eac | 89 | /* The thread ID that this varobj_root belong to. This field |
581e13c1 | 90 | is only valid if valid_block is not NULL. |
c5b48eac VP |
91 | When not 0, indicates which thread 'frame' belongs to. |
92 | When 0, indicates that the thread list was empty when the varobj_root | |
93 | was created. */ | |
94 | int thread_id; | |
95 | ||
a5defcdc VP |
96 | /* If 1, the -var-update always recomputes the value in the |
97 | current thread and frame. Otherwise, variable object is | |
581e13c1 | 98 | always updated in the specific scope/thread/frame. */ |
a5defcdc | 99 | int floating; |
73a93a32 | 100 | |
8756216b DP |
101 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
102 | to symbols that do not exist anymore. */ | |
103 | int is_valid; | |
104 | ||
581e13c1 | 105 | /* Language info for this variable and its children. */ |
72330bd6 | 106 | struct language_specific *lang; |
8b93c638 | 107 | |
581e13c1 | 108 | /* The varobj for this root node. */ |
72330bd6 | 109 | struct varobj *rootvar; |
8b93c638 | 110 | |
72330bd6 AC |
111 | /* Next root variable */ |
112 | struct varobj_root *next; | |
113 | }; | |
8b93c638 JM |
114 | |
115 | /* Every variable in the system has a structure of this type defined | |
581e13c1 MS |
116 | for it. This structure holds all information necessary to manipulate |
117 | a particular object variable. Members which must be freed are noted. */ | |
8b93c638 | 118 | struct varobj |
72330bd6 | 119 | { |
8b93c638 | 120 | |
581e13c1 | 121 | /* Alloc'd name of the variable for this object. If this variable is a |
72330bd6 | 122 | child, then this name will be the child's source name. |
581e13c1 MS |
123 | (bar, not foo.bar). */ |
124 | /* NOTE: This is the "expression". */ | |
72330bd6 | 125 | char *name; |
8b93c638 | 126 | |
02142340 VP |
127 | /* Alloc'd expression for this child. Can be used to create a |
128 | root variable corresponding to this child. */ | |
129 | char *path_expr; | |
130 | ||
581e13c1 MS |
131 | /* The alloc'd name for this variable's object. This is here for |
132 | convenience when constructing this object's children. */ | |
72330bd6 | 133 | char *obj_name; |
8b93c638 | 134 | |
581e13c1 | 135 | /* Index of this variable in its parent or -1. */ |
72330bd6 | 136 | int index; |
8b93c638 | 137 | |
202ddcaa VP |
138 | /* The type of this variable. This can be NULL |
139 | for artifial variable objects -- currently, the "accessibility" | |
140 | variable objects in C++. */ | |
72330bd6 | 141 | struct type *type; |
8b93c638 | 142 | |
b20d8971 VP |
143 | /* The value of this expression or subexpression. A NULL value |
144 | indicates there was an error getting this value. | |
b2c2bd75 VP |
145 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
146 | the value is either NULL, or not lazy. */ | |
30b28db1 | 147 | struct value *value; |
8b93c638 | 148 | |
581e13c1 | 149 | /* The number of (immediate) children this variable has. */ |
72330bd6 | 150 | int num_children; |
8b93c638 | 151 | |
581e13c1 | 152 | /* If this object is a child, this points to its immediate parent. */ |
72330bd6 | 153 | struct varobj *parent; |
8b93c638 | 154 | |
28335dcc VP |
155 | /* Children of this object. */ |
156 | VEC (varobj_p) *children; | |
8b93c638 | 157 | |
b6313243 TT |
158 | /* Whether the children of this varobj were requested. This field is |
159 | used to decide if dynamic varobj should recompute their children. | |
160 | In the event that the frontend never asked for the children, we | |
161 | can avoid that. */ | |
162 | int children_requested; | |
163 | ||
581e13c1 MS |
164 | /* Description of the root variable. Points to root variable for |
165 | children. */ | |
72330bd6 | 166 | struct varobj_root *root; |
8b93c638 | 167 | |
581e13c1 | 168 | /* The format of the output for this object. */ |
72330bd6 | 169 | enum varobj_display_formats format; |
fb9b6b35 | 170 | |
581e13c1 | 171 | /* Was this variable updated via a varobj_set_value operation. */ |
fb9b6b35 | 172 | int updated; |
85265413 NR |
173 | |
174 | /* Last print value. */ | |
175 | char *print_value; | |
25d5ea92 VP |
176 | |
177 | /* Is this variable frozen. Frozen variables are never implicitly | |
178 | updated by -var-update * | |
179 | or -var-update <direct-or-indirect-parent>. */ | |
180 | int frozen; | |
181 | ||
182 | /* Is the value of this variable intentionally not fetched? It is | |
183 | not fetched if either the variable is frozen, or any parents is | |
184 | frozen. */ | |
185 | int not_fetched; | |
b6313243 | 186 | |
0cc7d26f TT |
187 | /* Sub-range of children which the MI consumer has requested. If |
188 | FROM < 0 or TO < 0, means that all children have been | |
189 | requested. */ | |
190 | int from; | |
191 | int to; | |
192 | ||
193 | /* The pretty-printer constructor. If NULL, then the default | |
194 | pretty-printer will be looked up. If None, then no | |
195 | pretty-printer will be installed. */ | |
196 | PyObject *constructor; | |
197 | ||
b6313243 TT |
198 | /* The pretty-printer that has been constructed. If NULL, then a |
199 | new printer object is needed, and one will be constructed. */ | |
200 | PyObject *pretty_printer; | |
0cc7d26f TT |
201 | |
202 | /* The iterator returned by the printer's 'children' method, or NULL | |
203 | if not available. */ | |
204 | PyObject *child_iter; | |
205 | ||
206 | /* We request one extra item from the iterator, so that we can | |
207 | report to the caller whether there are more items than we have | |
208 | already reported. However, we don't want to install this value | |
209 | when we read it, because that will mess up future updates. So, | |
210 | we stash it here instead. */ | |
211 | PyObject *saved_item; | |
72330bd6 | 212 | }; |
8b93c638 | 213 | |
8b93c638 | 214 | struct cpstack |
72330bd6 AC |
215 | { |
216 | char *name; | |
217 | struct cpstack *next; | |
218 | }; | |
8b93c638 JM |
219 | |
220 | /* A list of varobjs */ | |
221 | ||
222 | struct vlist | |
72330bd6 AC |
223 | { |
224 | struct varobj *var; | |
225 | struct vlist *next; | |
226 | }; | |
8b93c638 JM |
227 | |
228 | /* Private function prototypes */ | |
229 | ||
581e13c1 | 230 | /* Helper functions for the above subcommands. */ |
8b93c638 | 231 | |
a14ed312 | 232 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 233 | |
a14ed312 KB |
234 | static void delete_variable_1 (struct cpstack **, int *, |
235 | struct varobj *, int, int); | |
8b93c638 | 236 | |
a14ed312 | 237 | static int install_variable (struct varobj *); |
8b93c638 | 238 | |
a14ed312 | 239 | static void uninstall_variable (struct varobj *); |
8b93c638 | 240 | |
a14ed312 | 241 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 242 | |
b6313243 TT |
243 | static struct varobj * |
244 | create_child_with_value (struct varobj *parent, int index, const char *name, | |
245 | struct value *value); | |
246 | ||
8b93c638 JM |
247 | /* Utility routines */ |
248 | ||
a14ed312 | 249 | static struct varobj *new_variable (void); |
8b93c638 | 250 | |
a14ed312 | 251 | static struct varobj *new_root_variable (void); |
8b93c638 | 252 | |
a14ed312 | 253 | static void free_variable (struct varobj *var); |
8b93c638 | 254 | |
74b7792f AC |
255 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
256 | ||
a14ed312 | 257 | static struct type *get_type (struct varobj *var); |
8b93c638 | 258 | |
6e2a9270 VP |
259 | static struct type *get_value_type (struct varobj *var); |
260 | ||
a14ed312 | 261 | static struct type *get_target_type (struct type *); |
8b93c638 | 262 | |
a14ed312 | 263 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 264 | |
a14ed312 | 265 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 266 | |
a14ed312 | 267 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 268 | |
acd65feb VP |
269 | static int install_new_value (struct varobj *var, struct value *value, |
270 | int initial); | |
271 | ||
581e13c1 | 272 | /* Language-specific routines. */ |
8b93c638 | 273 | |
a14ed312 | 274 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 275 | |
a14ed312 | 276 | static int number_of_children (struct varobj *); |
8b93c638 | 277 | |
a14ed312 | 278 | static char *name_of_variable (struct varobj *); |
8b93c638 | 279 | |
a14ed312 | 280 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 281 | |
30b28db1 | 282 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 283 | |
30b28db1 | 284 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 285 | |
de051565 MK |
286 | static char *my_value_of_variable (struct varobj *var, |
287 | enum varobj_display_formats format); | |
8b93c638 | 288 | |
85265413 | 289 | static char *value_get_print_value (struct value *value, |
b6313243 | 290 | enum varobj_display_formats format, |
d452c4bc | 291 | struct varobj *var); |
85265413 | 292 | |
b2c2bd75 VP |
293 | static int varobj_value_is_changeable_p (struct varobj *var); |
294 | ||
295 | static int is_root_p (struct varobj *var); | |
8b93c638 | 296 | |
d8b65138 JK |
297 | #if HAVE_PYTHON |
298 | ||
9a1edae6 PM |
299 | static struct varobj *varobj_add_child (struct varobj *var, |
300 | const char *name, | |
301 | struct value *value); | |
b6313243 | 302 | |
d8b65138 JK |
303 | #endif /* HAVE_PYTHON */ |
304 | ||
8b93c638 JM |
305 | /* C implementation */ |
306 | ||
a14ed312 | 307 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 308 | |
a14ed312 | 309 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 310 | |
a14ed312 | 311 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 312 | |
02142340 VP |
313 | static char *c_path_expr_of_child (struct varobj *child); |
314 | ||
30b28db1 | 315 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 316 | |
30b28db1 | 317 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 318 | |
a14ed312 | 319 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 320 | |
de051565 MK |
321 | static char *c_value_of_variable (struct varobj *var, |
322 | enum varobj_display_formats format); | |
8b93c638 JM |
323 | |
324 | /* C++ implementation */ | |
325 | ||
a14ed312 | 326 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 327 | |
a14ed312 | 328 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 329 | |
a14ed312 | 330 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 331 | |
a14ed312 | 332 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 333 | |
02142340 VP |
334 | static char *cplus_path_expr_of_child (struct varobj *child); |
335 | ||
30b28db1 | 336 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 337 | |
30b28db1 | 338 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 339 | |
a14ed312 | 340 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 341 | |
de051565 MK |
342 | static char *cplus_value_of_variable (struct varobj *var, |
343 | enum varobj_display_formats format); | |
8b93c638 JM |
344 | |
345 | /* Java implementation */ | |
346 | ||
a14ed312 | 347 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 348 | |
a14ed312 | 349 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 350 | |
a14ed312 | 351 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 352 | |
02142340 VP |
353 | static char *java_path_expr_of_child (struct varobj *child); |
354 | ||
30b28db1 | 355 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 356 | |
30b28db1 | 357 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 358 | |
a14ed312 | 359 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 360 | |
de051565 MK |
361 | static char *java_value_of_variable (struct varobj *var, |
362 | enum varobj_display_formats format); | |
8b93c638 | 363 | |
40591b7d JCD |
364 | /* Ada implementation */ |
365 | ||
366 | static int ada_number_of_children (struct varobj *var); | |
367 | ||
368 | static char *ada_name_of_variable (struct varobj *parent); | |
369 | ||
370 | static char *ada_name_of_child (struct varobj *parent, int index); | |
371 | ||
372 | static char *ada_path_expr_of_child (struct varobj *child); | |
373 | ||
374 | static struct value *ada_value_of_root (struct varobj **var_handle); | |
375 | ||
376 | static struct value *ada_value_of_child (struct varobj *parent, int index); | |
377 | ||
378 | static struct type *ada_type_of_child (struct varobj *parent, int index); | |
379 | ||
380 | static char *ada_value_of_variable (struct varobj *var, | |
381 | enum varobj_display_formats format); | |
382 | ||
8b93c638 JM |
383 | /* The language specific vector */ |
384 | ||
385 | struct language_specific | |
72330bd6 | 386 | { |
8b93c638 | 387 | |
581e13c1 | 388 | /* The language of this variable. */ |
72330bd6 | 389 | enum varobj_languages language; |
8b93c638 | 390 | |
581e13c1 | 391 | /* The number of children of PARENT. */ |
72330bd6 | 392 | int (*number_of_children) (struct varobj * parent); |
8b93c638 | 393 | |
581e13c1 | 394 | /* The name (expression) of a root varobj. */ |
72330bd6 | 395 | char *(*name_of_variable) (struct varobj * parent); |
8b93c638 | 396 | |
581e13c1 | 397 | /* The name of the INDEX'th child of PARENT. */ |
72330bd6 | 398 | char *(*name_of_child) (struct varobj * parent, int index); |
8b93c638 | 399 | |
02142340 VP |
400 | /* Returns the rooted expression of CHILD, which is a variable |
401 | obtain that has some parent. */ | |
402 | char *(*path_expr_of_child) (struct varobj * child); | |
403 | ||
581e13c1 | 404 | /* The ``struct value *'' of the root variable ROOT. */ |
30b28db1 | 405 | struct value *(*value_of_root) (struct varobj ** root_handle); |
8b93c638 | 406 | |
581e13c1 | 407 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
30b28db1 | 408 | struct value *(*value_of_child) (struct varobj * parent, int index); |
8b93c638 | 409 | |
581e13c1 | 410 | /* The type of the INDEX'th child of PARENT. */ |
72330bd6 | 411 | struct type *(*type_of_child) (struct varobj * parent, int index); |
8b93c638 | 412 | |
581e13c1 | 413 | /* The current value of VAR. */ |
de051565 MK |
414 | char *(*value_of_variable) (struct varobj * var, |
415 | enum varobj_display_formats format); | |
72330bd6 | 416 | }; |
8b93c638 | 417 | |
581e13c1 | 418 | /* Array of known source language routines. */ |
d5d6fca5 | 419 | static struct language_specific languages[vlang_end] = { |
581e13c1 | 420 | /* Unknown (try treating as C). */ |
8b93c638 | 421 | { |
72330bd6 AC |
422 | vlang_unknown, |
423 | c_number_of_children, | |
424 | c_name_of_variable, | |
425 | c_name_of_child, | |
02142340 | 426 | c_path_expr_of_child, |
72330bd6 AC |
427 | c_value_of_root, |
428 | c_value_of_child, | |
429 | c_type_of_child, | |
72330bd6 | 430 | c_value_of_variable} |
8b93c638 JM |
431 | , |
432 | /* C */ | |
433 | { | |
72330bd6 AC |
434 | vlang_c, |
435 | c_number_of_children, | |
436 | c_name_of_variable, | |
437 | c_name_of_child, | |
02142340 | 438 | c_path_expr_of_child, |
72330bd6 AC |
439 | c_value_of_root, |
440 | c_value_of_child, | |
441 | c_type_of_child, | |
72330bd6 | 442 | c_value_of_variable} |
8b93c638 JM |
443 | , |
444 | /* C++ */ | |
445 | { | |
72330bd6 AC |
446 | vlang_cplus, |
447 | cplus_number_of_children, | |
448 | cplus_name_of_variable, | |
449 | cplus_name_of_child, | |
02142340 | 450 | cplus_path_expr_of_child, |
72330bd6 AC |
451 | cplus_value_of_root, |
452 | cplus_value_of_child, | |
453 | cplus_type_of_child, | |
72330bd6 | 454 | cplus_value_of_variable} |
8b93c638 JM |
455 | , |
456 | /* Java */ | |
457 | { | |
72330bd6 AC |
458 | vlang_java, |
459 | java_number_of_children, | |
460 | java_name_of_variable, | |
461 | java_name_of_child, | |
02142340 | 462 | java_path_expr_of_child, |
72330bd6 AC |
463 | java_value_of_root, |
464 | java_value_of_child, | |
465 | java_type_of_child, | |
40591b7d JCD |
466 | java_value_of_variable}, |
467 | /* Ada */ | |
468 | { | |
469 | vlang_ada, | |
470 | ada_number_of_children, | |
471 | ada_name_of_variable, | |
472 | ada_name_of_child, | |
473 | ada_path_expr_of_child, | |
474 | ada_value_of_root, | |
475 | ada_value_of_child, | |
476 | ada_type_of_child, | |
477 | ada_value_of_variable} | |
8b93c638 JM |
478 | }; |
479 | ||
581e13c1 | 480 | /* A little convenience enum for dealing with C++/Java. */ |
8b93c638 | 481 | enum vsections |
72330bd6 AC |
482 | { |
483 | v_public = 0, v_private, v_protected | |
484 | }; | |
8b93c638 JM |
485 | |
486 | /* Private data */ | |
487 | ||
581e13c1 | 488 | /* Mappings of varobj_display_formats enums to gdb's format codes. */ |
72330bd6 | 489 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 | 490 | |
581e13c1 | 491 | /* Header of the list of root variable objects. */ |
8b93c638 | 492 | static struct varobj_root *rootlist; |
8b93c638 | 493 | |
581e13c1 MS |
494 | /* Prime number indicating the number of buckets in the hash table. */ |
495 | /* A prime large enough to avoid too many colisions. */ | |
8b93c638 JM |
496 | #define VAROBJ_TABLE_SIZE 227 |
497 | ||
581e13c1 | 498 | /* Pointer to the varobj hash table (built at run time). */ |
8b93c638 JM |
499 | static struct vlist **varobj_table; |
500 | ||
581e13c1 | 501 | /* Is the variable X one of our "fake" children? */ |
8b93c638 JM |
502 | #define CPLUS_FAKE_CHILD(x) \ |
503 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
504 | \f | |
505 | ||
506 | /* API Implementation */ | |
b2c2bd75 VP |
507 | static int |
508 | is_root_p (struct varobj *var) | |
509 | { | |
510 | return (var->root->rootvar == var); | |
511 | } | |
8b93c638 | 512 | |
d452c4bc UW |
513 | #ifdef HAVE_PYTHON |
514 | /* Helper function to install a Python environment suitable for | |
515 | use during operations on VAR. */ | |
516 | struct cleanup * | |
517 | varobj_ensure_python_env (struct varobj *var) | |
518 | { | |
519 | return ensure_python_env (var->root->exp->gdbarch, | |
520 | var->root->exp->language_defn); | |
521 | } | |
522 | #endif | |
523 | ||
581e13c1 | 524 | /* Creates a varobj (not its children). */ |
8b93c638 | 525 | |
7d8547c9 AC |
526 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
527 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
528 | ||
529 | static struct frame_info * | |
530 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
531 | { | |
532 | struct frame_info *frame = NULL; | |
533 | ||
534 | if (frame_addr == (CORE_ADDR) 0) | |
535 | return NULL; | |
536 | ||
9d49bdc2 PA |
537 | for (frame = get_current_frame (); |
538 | frame != NULL; | |
539 | frame = get_prev_frame (frame)) | |
7d8547c9 | 540 | { |
1fac167a UW |
541 | /* The CORE_ADDR we get as argument was parsed from a string GDB |
542 | output as $fp. This output got truncated to gdbarch_addr_bit. | |
543 | Truncate the frame base address in the same manner before | |
544 | comparing it against our argument. */ | |
545 | CORE_ADDR frame_base = get_frame_base_address (frame); | |
546 | int addr_bit = gdbarch_addr_bit (get_frame_arch (frame)); | |
a109c7c1 | 547 | |
1fac167a UW |
548 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
549 | frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
550 | ||
551 | if (frame_base == frame_addr) | |
7d8547c9 AC |
552 | return frame; |
553 | } | |
9d49bdc2 PA |
554 | |
555 | return NULL; | |
7d8547c9 AC |
556 | } |
557 | ||
8b93c638 JM |
558 | struct varobj * |
559 | varobj_create (char *objname, | |
72330bd6 | 560 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
561 | { |
562 | struct varobj *var; | |
8b93c638 JM |
563 | struct cleanup *old_chain; |
564 | ||
581e13c1 | 565 | /* Fill out a varobj structure for the (root) variable being constructed. */ |
8b93c638 | 566 | var = new_root_variable (); |
74b7792f | 567 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
568 | |
569 | if (expression != NULL) | |
570 | { | |
e4195b40 | 571 | struct frame_info *fi; |
35633fef | 572 | struct frame_id old_id = null_frame_id; |
e4195b40 | 573 | struct block *block; |
8b93c638 JM |
574 | char *p; |
575 | enum varobj_languages lang; | |
e55dccf0 | 576 | struct value *value = NULL; |
8b93c638 | 577 | |
9d49bdc2 PA |
578 | /* Parse and evaluate the expression, filling in as much of the |
579 | variable's data as possible. */ | |
580 | ||
581 | if (has_stack_frames ()) | |
582 | { | |
581e13c1 | 583 | /* Allow creator to specify context of variable. */ |
9d49bdc2 PA |
584 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
585 | fi = get_selected_frame (NULL); | |
586 | else | |
587 | /* FIXME: cagney/2002-11-23: This code should be doing a | |
588 | lookup using the frame ID and not just the frame's | |
589 | ``address''. This, of course, means an interface | |
590 | change. However, with out that interface change ISAs, | |
591 | such as the ia64 with its two stacks, won't work. | |
592 | Similar goes for the case where there is a frameless | |
593 | function. */ | |
594 | fi = find_frame_addr_in_frame_chain (frame); | |
595 | } | |
8b93c638 | 596 | else |
9d49bdc2 | 597 | fi = NULL; |
8b93c638 | 598 | |
581e13c1 | 599 | /* frame = -2 means always use selected frame. */ |
73a93a32 | 600 | if (type == USE_SELECTED_FRAME) |
a5defcdc | 601 | var->root->floating = 1; |
73a93a32 | 602 | |
8b93c638 JM |
603 | block = NULL; |
604 | if (fi != NULL) | |
ae767bfb | 605 | block = get_frame_block (fi, 0); |
8b93c638 JM |
606 | |
607 | p = expression; | |
608 | innermost_block = NULL; | |
73a93a32 | 609 | /* Wrap the call to parse expression, so we can |
581e13c1 | 610 | return a sensible error. */ |
73a93a32 JI |
611 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) |
612 | { | |
f748fb40 | 613 | do_cleanups (old_chain); |
73a93a32 JI |
614 | return NULL; |
615 | } | |
8b93c638 | 616 | |
581e13c1 | 617 | /* Don't allow variables to be created for types. */ |
8b93c638 JM |
618 | if (var->root->exp->elts[0].opcode == OP_TYPE) |
619 | { | |
620 | do_cleanups (old_chain); | |
bc8332bb AC |
621 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
622 | " as an expression.\n"); | |
8b93c638 JM |
623 | return NULL; |
624 | } | |
625 | ||
626 | var->format = variable_default_display (var); | |
627 | var->root->valid_block = innermost_block; | |
1b36a34b | 628 | var->name = xstrdup (expression); |
02142340 | 629 | /* For a root var, the name and the expr are the same. */ |
1b36a34b | 630 | var->path_expr = xstrdup (expression); |
8b93c638 JM |
631 | |
632 | /* When the frame is different from the current frame, | |
633 | we must select the appropriate frame before parsing | |
634 | the expression, otherwise the value will not be current. | |
581e13c1 | 635 | Since select_frame is so benign, just call it for all cases. */ |
4e22772d | 636 | if (innermost_block) |
8b93c638 | 637 | { |
4e22772d JK |
638 | /* User could specify explicit FRAME-ADDR which was not found but |
639 | EXPRESSION is frame specific and we would not be able to evaluate | |
640 | it correctly next time. With VALID_BLOCK set we must also set | |
641 | FRAME and THREAD_ID. */ | |
642 | if (fi == NULL) | |
643 | error (_("Failed to find the specified frame")); | |
644 | ||
7a424e99 | 645 | var->root->frame = get_frame_id (fi); |
c5b48eac | 646 | var->root->thread_id = pid_to_thread_id (inferior_ptid); |
35633fef | 647 | old_id = get_frame_id (get_selected_frame (NULL)); |
c5b48eac | 648 | select_frame (fi); |
8b93c638 JM |
649 | } |
650 | ||
340a7723 | 651 | /* We definitely need to catch errors here. |
8b93c638 | 652 | If evaluate_expression succeeds we got the value we wanted. |
581e13c1 | 653 | But if it fails, we still go on with a call to evaluate_type(). */ |
acd65feb | 654 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
e55dccf0 VP |
655 | { |
656 | /* Error getting the value. Try to at least get the | |
657 | right type. */ | |
658 | struct value *type_only_value = evaluate_type (var->root->exp); | |
a109c7c1 | 659 | |
e55dccf0 VP |
660 | var->type = value_type (type_only_value); |
661 | } | |
662 | else | |
663 | var->type = value_type (value); | |
acd65feb | 664 | |
acd65feb | 665 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
666 | |
667 | /* Set language info */ | |
668 | lang = variable_language (var); | |
d5d6fca5 | 669 | var->root->lang = &languages[lang]; |
8b93c638 | 670 | |
581e13c1 | 671 | /* Set ourselves as our root. */ |
8b93c638 JM |
672 | var->root->rootvar = var; |
673 | ||
581e13c1 | 674 | /* Reset the selected frame. */ |
35633fef JK |
675 | if (frame_id_p (old_id)) |
676 | select_frame (frame_find_by_id (old_id)); | |
8b93c638 JM |
677 | } |
678 | ||
73a93a32 | 679 | /* If the variable object name is null, that means this |
581e13c1 | 680 | is a temporary variable, so don't install it. */ |
73a93a32 JI |
681 | |
682 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 | 683 | { |
1b36a34b | 684 | var->obj_name = xstrdup (objname); |
8b93c638 JM |
685 | |
686 | /* If a varobj name is duplicated, the install will fail so | |
581e13c1 | 687 | we must cleanup. */ |
8b93c638 JM |
688 | if (!install_variable (var)) |
689 | { | |
690 | do_cleanups (old_chain); | |
691 | return NULL; | |
692 | } | |
693 | } | |
694 | ||
695 | discard_cleanups (old_chain); | |
696 | return var; | |
697 | } | |
698 | ||
581e13c1 | 699 | /* Generates an unique name that can be used for a varobj. */ |
8b93c638 JM |
700 | |
701 | char * | |
702 | varobj_gen_name (void) | |
703 | { | |
704 | static int id = 0; | |
e64d9b3d | 705 | char *obj_name; |
8b93c638 | 706 | |
581e13c1 | 707 | /* Generate a name for this object. */ |
8b93c638 | 708 | id++; |
b435e160 | 709 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 710 | |
e64d9b3d | 711 | return obj_name; |
8b93c638 JM |
712 | } |
713 | ||
61d8f275 JK |
714 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
715 | error if OBJNAME cannot be found. */ | |
8b93c638 JM |
716 | |
717 | struct varobj * | |
718 | varobj_get_handle (char *objname) | |
719 | { | |
720 | struct vlist *cv; | |
721 | const char *chp; | |
722 | unsigned int index = 0; | |
723 | unsigned int i = 1; | |
724 | ||
725 | for (chp = objname; *chp; chp++) | |
726 | { | |
727 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
728 | } | |
729 | ||
730 | cv = *(varobj_table + index); | |
731 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
732 | cv = cv->next; | |
733 | ||
734 | if (cv == NULL) | |
8a3fe4f8 | 735 | error (_("Variable object not found")); |
8b93c638 JM |
736 | |
737 | return cv->var; | |
738 | } | |
739 | ||
581e13c1 | 740 | /* Given the handle, return the name of the object. */ |
8b93c638 JM |
741 | |
742 | char * | |
743 | varobj_get_objname (struct varobj *var) | |
744 | { | |
745 | return var->obj_name; | |
746 | } | |
747 | ||
581e13c1 | 748 | /* Given the handle, return the expression represented by the object. */ |
8b93c638 JM |
749 | |
750 | char * | |
751 | varobj_get_expression (struct varobj *var) | |
752 | { | |
753 | return name_of_variable (var); | |
754 | } | |
755 | ||
756 | /* Deletes a varobj and all its children if only_children == 0, | |
3e43a32a MS |
757 | otherwise deletes only the children; returns a malloc'ed list of |
758 | all the (malloc'ed) names of the variables that have been deleted | |
581e13c1 | 759 | (NULL terminated). */ |
8b93c638 JM |
760 | |
761 | int | |
762 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
763 | { | |
764 | int delcount; | |
765 | int mycount; | |
766 | struct cpstack *result = NULL; | |
767 | char **cp; | |
768 | ||
581e13c1 | 769 | /* Initialize a stack for temporary results. */ |
8b93c638 JM |
770 | cppush (&result, NULL); |
771 | ||
772 | if (only_children) | |
581e13c1 | 773 | /* Delete only the variable children. */ |
8b93c638 JM |
774 | delcount = delete_variable (&result, var, 1 /* only the children */ ); |
775 | else | |
581e13c1 | 776 | /* Delete the variable and all its children. */ |
8b93c638 JM |
777 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); |
778 | ||
581e13c1 | 779 | /* We may have been asked to return a list of what has been deleted. */ |
8b93c638 JM |
780 | if (dellist != NULL) |
781 | { | |
782 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
783 | ||
784 | cp = *dellist; | |
785 | mycount = delcount; | |
786 | *cp = cppop (&result); | |
787 | while ((*cp != NULL) && (mycount > 0)) | |
788 | { | |
789 | mycount--; | |
790 | cp++; | |
791 | *cp = cppop (&result); | |
792 | } | |
793 | ||
794 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 795 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 796 | mycount); |
8b93c638 JM |
797 | } |
798 | ||
799 | return delcount; | |
800 | } | |
801 | ||
d8b65138 JK |
802 | #if HAVE_PYTHON |
803 | ||
b6313243 TT |
804 | /* Convenience function for varobj_set_visualizer. Instantiate a |
805 | pretty-printer for a given value. */ | |
806 | static PyObject * | |
807 | instantiate_pretty_printer (PyObject *constructor, struct value *value) | |
808 | { | |
b6313243 TT |
809 | PyObject *val_obj = NULL; |
810 | PyObject *printer; | |
b6313243 | 811 | |
b6313243 | 812 | val_obj = value_to_value_object (value); |
b6313243 TT |
813 | if (! val_obj) |
814 | return NULL; | |
815 | ||
816 | printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL); | |
817 | Py_DECREF (val_obj); | |
818 | return printer; | |
b6313243 TT |
819 | } |
820 | ||
d8b65138 JK |
821 | #endif |
822 | ||
581e13c1 | 823 | /* Set/Get variable object display format. */ |
8b93c638 JM |
824 | |
825 | enum varobj_display_formats | |
826 | varobj_set_display_format (struct varobj *var, | |
827 | enum varobj_display_formats format) | |
828 | { | |
829 | switch (format) | |
830 | { | |
831 | case FORMAT_NATURAL: | |
832 | case FORMAT_BINARY: | |
833 | case FORMAT_DECIMAL: | |
834 | case FORMAT_HEXADECIMAL: | |
835 | case FORMAT_OCTAL: | |
836 | var->format = format; | |
837 | break; | |
838 | ||
839 | default: | |
840 | var->format = variable_default_display (var); | |
841 | } | |
842 | ||
ae7d22a6 VP |
843 | if (varobj_value_is_changeable_p (var) |
844 | && var->value && !value_lazy (var->value)) | |
845 | { | |
6c761d9c | 846 | xfree (var->print_value); |
d452c4bc | 847 | var->print_value = value_get_print_value (var->value, var->format, var); |
ae7d22a6 VP |
848 | } |
849 | ||
8b93c638 JM |
850 | return var->format; |
851 | } | |
852 | ||
853 | enum varobj_display_formats | |
854 | varobj_get_display_format (struct varobj *var) | |
855 | { | |
856 | return var->format; | |
857 | } | |
858 | ||
b6313243 TT |
859 | char * |
860 | varobj_get_display_hint (struct varobj *var) | |
861 | { | |
862 | char *result = NULL; | |
863 | ||
864 | #if HAVE_PYTHON | |
d452c4bc UW |
865 | struct cleanup *back_to = varobj_ensure_python_env (var); |
866 | ||
b6313243 TT |
867 | if (var->pretty_printer) |
868 | result = gdbpy_get_display_hint (var->pretty_printer); | |
d452c4bc UW |
869 | |
870 | do_cleanups (back_to); | |
b6313243 TT |
871 | #endif |
872 | ||
873 | return result; | |
874 | } | |
875 | ||
0cc7d26f TT |
876 | /* Return true if the varobj has items after TO, false otherwise. */ |
877 | ||
878 | int | |
879 | varobj_has_more (struct varobj *var, int to) | |
880 | { | |
881 | if (VEC_length (varobj_p, var->children) > to) | |
882 | return 1; | |
883 | return ((to == -1 || VEC_length (varobj_p, var->children) == to) | |
884 | && var->saved_item != NULL); | |
885 | } | |
886 | ||
c5b48eac VP |
887 | /* If the variable object is bound to a specific thread, that |
888 | is its evaluation can always be done in context of a frame | |
889 | inside that thread, returns GDB id of the thread -- which | |
581e13c1 | 890 | is always positive. Otherwise, returns -1. */ |
c5b48eac VP |
891 | int |
892 | varobj_get_thread_id (struct varobj *var) | |
893 | { | |
894 | if (var->root->valid_block && var->root->thread_id > 0) | |
895 | return var->root->thread_id; | |
896 | else | |
897 | return -1; | |
898 | } | |
899 | ||
25d5ea92 VP |
900 | void |
901 | varobj_set_frozen (struct varobj *var, int frozen) | |
902 | { | |
903 | /* When a variable is unfrozen, we don't fetch its value. | |
904 | The 'not_fetched' flag remains set, so next -var-update | |
905 | won't complain. | |
906 | ||
907 | We don't fetch the value, because for structures the client | |
908 | should do -var-update anyway. It would be bad to have different | |
909 | client-size logic for structure and other types. */ | |
910 | var->frozen = frozen; | |
911 | } | |
912 | ||
913 | int | |
914 | varobj_get_frozen (struct varobj *var) | |
915 | { | |
916 | return var->frozen; | |
917 | } | |
918 | ||
0cc7d26f TT |
919 | /* A helper function that restricts a range to what is actually |
920 | available in a VEC. This follows the usual rules for the meaning | |
921 | of FROM and TO -- if either is negative, the entire range is | |
922 | used. */ | |
923 | ||
924 | static void | |
925 | restrict_range (VEC (varobj_p) *children, int *from, int *to) | |
926 | { | |
927 | if (*from < 0 || *to < 0) | |
928 | { | |
929 | *from = 0; | |
930 | *to = VEC_length (varobj_p, children); | |
931 | } | |
932 | else | |
933 | { | |
934 | if (*from > VEC_length (varobj_p, children)) | |
935 | *from = VEC_length (varobj_p, children); | |
936 | if (*to > VEC_length (varobj_p, children)) | |
937 | *to = VEC_length (varobj_p, children); | |
938 | if (*from > *to) | |
939 | *from = *to; | |
940 | } | |
941 | } | |
942 | ||
d8b65138 JK |
943 | #if HAVE_PYTHON |
944 | ||
0cc7d26f TT |
945 | /* A helper for update_dynamic_varobj_children that installs a new |
946 | child when needed. */ | |
947 | ||
948 | static void | |
949 | install_dynamic_child (struct varobj *var, | |
950 | VEC (varobj_p) **changed, | |
951 | VEC (varobj_p) **new, | |
952 | VEC (varobj_p) **unchanged, | |
953 | int *cchanged, | |
954 | int index, | |
955 | const char *name, | |
956 | struct value *value) | |
957 | { | |
958 | if (VEC_length (varobj_p, var->children) < index + 1) | |
959 | { | |
960 | /* There's no child yet. */ | |
961 | struct varobj *child = varobj_add_child (var, name, value); | |
a109c7c1 | 962 | |
0cc7d26f TT |
963 | if (new) |
964 | { | |
965 | VEC_safe_push (varobj_p, *new, child); | |
966 | *cchanged = 1; | |
967 | } | |
968 | } | |
969 | else | |
970 | { | |
971 | varobj_p existing = VEC_index (varobj_p, var->children, index); | |
a109c7c1 | 972 | |
0cc7d26f TT |
973 | if (install_new_value (existing, value, 0)) |
974 | { | |
975 | if (changed) | |
976 | VEC_safe_push (varobj_p, *changed, existing); | |
977 | } | |
978 | else if (unchanged) | |
979 | VEC_safe_push (varobj_p, *unchanged, existing); | |
980 | } | |
981 | } | |
982 | ||
0cc7d26f TT |
983 | static int |
984 | dynamic_varobj_has_child_method (struct varobj *var) | |
985 | { | |
986 | struct cleanup *back_to; | |
987 | PyObject *printer = var->pretty_printer; | |
988 | int result; | |
989 | ||
990 | back_to = varobj_ensure_python_env (var); | |
991 | result = PyObject_HasAttr (printer, gdbpy_children_cst); | |
992 | do_cleanups (back_to); | |
993 | return result; | |
994 | } | |
995 | ||
996 | #endif | |
997 | ||
b6313243 TT |
998 | static int |
999 | update_dynamic_varobj_children (struct varobj *var, | |
1000 | VEC (varobj_p) **changed, | |
0cc7d26f TT |
1001 | VEC (varobj_p) **new, |
1002 | VEC (varobj_p) **unchanged, | |
1003 | int *cchanged, | |
1004 | int update_children, | |
1005 | int from, | |
1006 | int to) | |
b6313243 TT |
1007 | { |
1008 | #if HAVE_PYTHON | |
b6313243 TT |
1009 | struct cleanup *back_to; |
1010 | PyObject *children; | |
b6313243 | 1011 | int i; |
b6313243 | 1012 | PyObject *printer = var->pretty_printer; |
b6313243 | 1013 | |
d452c4bc | 1014 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
1015 | |
1016 | *cchanged = 0; | |
1017 | if (!PyObject_HasAttr (printer, gdbpy_children_cst)) | |
1018 | { | |
1019 | do_cleanups (back_to); | |
1020 | return 0; | |
1021 | } | |
1022 | ||
0cc7d26f | 1023 | if (update_children || !var->child_iter) |
b6313243 | 1024 | { |
0cc7d26f TT |
1025 | children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst, |
1026 | NULL); | |
b6313243 | 1027 | |
0cc7d26f TT |
1028 | if (!children) |
1029 | { | |
1030 | gdbpy_print_stack (); | |
1031 | error (_("Null value returned for children")); | |
1032 | } | |
b6313243 | 1033 | |
0cc7d26f | 1034 | make_cleanup_py_decref (children); |
b6313243 | 1035 | |
0cc7d26f TT |
1036 | if (!PyIter_Check (children)) |
1037 | error (_("Returned value is not iterable")); | |
1038 | ||
1039 | Py_XDECREF (var->child_iter); | |
1040 | var->child_iter = PyObject_GetIter (children); | |
1041 | if (!var->child_iter) | |
1042 | { | |
1043 | gdbpy_print_stack (); | |
1044 | error (_("Could not get children iterator")); | |
1045 | } | |
1046 | ||
1047 | Py_XDECREF (var->saved_item); | |
1048 | var->saved_item = NULL; | |
1049 | ||
1050 | i = 0; | |
b6313243 | 1051 | } |
0cc7d26f TT |
1052 | else |
1053 | i = VEC_length (varobj_p, var->children); | |
b6313243 | 1054 | |
0cc7d26f TT |
1055 | /* We ask for one extra child, so that MI can report whether there |
1056 | are more children. */ | |
1057 | for (; to < 0 || i < to + 1; ++i) | |
b6313243 | 1058 | { |
0cc7d26f | 1059 | PyObject *item; |
a4c8e806 | 1060 | int force_done = 0; |
b6313243 | 1061 | |
0cc7d26f TT |
1062 | /* See if there was a leftover from last time. */ |
1063 | if (var->saved_item) | |
1064 | { | |
1065 | item = var->saved_item; | |
1066 | var->saved_item = NULL; | |
1067 | } | |
1068 | else | |
1069 | item = PyIter_Next (var->child_iter); | |
b6313243 | 1070 | |
0cc7d26f | 1071 | if (!item) |
a4c8e806 TT |
1072 | { |
1073 | /* Normal end of iteration. */ | |
1074 | if (!PyErr_Occurred ()) | |
1075 | break; | |
1076 | ||
1077 | /* If we got a memory error, just use the text as the | |
1078 | item. */ | |
1079 | if (PyErr_ExceptionMatches (gdbpy_gdb_memory_error)) | |
1080 | { | |
1081 | PyObject *type, *value, *trace; | |
1082 | char *name_str, *value_str; | |
1083 | ||
1084 | PyErr_Fetch (&type, &value, &trace); | |
1085 | value_str = gdbpy_exception_to_string (type, value); | |
1086 | Py_XDECREF (type); | |
1087 | Py_XDECREF (value); | |
1088 | Py_XDECREF (trace); | |
1089 | if (!value_str) | |
1090 | { | |
1091 | gdbpy_print_stack (); | |
1092 | break; | |
1093 | } | |
1094 | ||
1095 | name_str = xstrprintf ("<error at %d>", i); | |
1096 | item = Py_BuildValue ("(ss)", name_str, value_str); | |
1097 | xfree (name_str); | |
1098 | xfree (value_str); | |
1099 | if (!item) | |
1100 | { | |
1101 | gdbpy_print_stack (); | |
1102 | break; | |
1103 | } | |
1104 | ||
1105 | force_done = 1; | |
1106 | } | |
1107 | else | |
1108 | { | |
1109 | /* Any other kind of error. */ | |
1110 | gdbpy_print_stack (); | |
1111 | break; | |
1112 | } | |
1113 | } | |
b6313243 | 1114 | |
0cc7d26f TT |
1115 | /* We don't want to push the extra child on any report list. */ |
1116 | if (to < 0 || i < to) | |
b6313243 | 1117 | { |
0cc7d26f | 1118 | PyObject *py_v; |
ddd49eee | 1119 | const char *name; |
0cc7d26f TT |
1120 | struct value *v; |
1121 | struct cleanup *inner; | |
1122 | int can_mention = from < 0 || i >= from; | |
1123 | ||
1124 | inner = make_cleanup_py_decref (item); | |
1125 | ||
1126 | if (!PyArg_ParseTuple (item, "sO", &name, &py_v)) | |
a4c8e806 TT |
1127 | { |
1128 | gdbpy_print_stack (); | |
1129 | error (_("Invalid item from the child list")); | |
1130 | } | |
0cc7d26f TT |
1131 | |
1132 | v = convert_value_from_python (py_v); | |
8dc78533 JK |
1133 | if (v == NULL) |
1134 | gdbpy_print_stack (); | |
0cc7d26f TT |
1135 | install_dynamic_child (var, can_mention ? changed : NULL, |
1136 | can_mention ? new : NULL, | |
1137 | can_mention ? unchanged : NULL, | |
1138 | can_mention ? cchanged : NULL, i, name, v); | |
1139 | do_cleanups (inner); | |
b6313243 | 1140 | } |
0cc7d26f | 1141 | else |
b6313243 | 1142 | { |
0cc7d26f TT |
1143 | Py_XDECREF (var->saved_item); |
1144 | var->saved_item = item; | |
b6313243 | 1145 | |
0cc7d26f TT |
1146 | /* We want to truncate the child list just before this |
1147 | element. */ | |
1148 | break; | |
1149 | } | |
a4c8e806 TT |
1150 | |
1151 | if (force_done) | |
1152 | break; | |
b6313243 TT |
1153 | } |
1154 | ||
1155 | if (i < VEC_length (varobj_p, var->children)) | |
1156 | { | |
0cc7d26f | 1157 | int j; |
a109c7c1 | 1158 | |
0cc7d26f TT |
1159 | *cchanged = 1; |
1160 | for (j = i; j < VEC_length (varobj_p, var->children); ++j) | |
1161 | varobj_delete (VEC_index (varobj_p, var->children, j), NULL, 0); | |
1162 | VEC_truncate (varobj_p, var->children, i); | |
b6313243 | 1163 | } |
0cc7d26f TT |
1164 | |
1165 | /* If there are fewer children than requested, note that the list of | |
1166 | children changed. */ | |
1167 | if (to >= 0 && VEC_length (varobj_p, var->children) < to) | |
1168 | *cchanged = 1; | |
1169 | ||
b6313243 TT |
1170 | var->num_children = VEC_length (varobj_p, var->children); |
1171 | ||
1172 | do_cleanups (back_to); | |
1173 | ||
b6313243 TT |
1174 | return 1; |
1175 | #else | |
1176 | gdb_assert (0 && "should never be called if Python is not enabled"); | |
1177 | #endif | |
1178 | } | |
25d5ea92 | 1179 | |
8b93c638 JM |
1180 | int |
1181 | varobj_get_num_children (struct varobj *var) | |
1182 | { | |
1183 | if (var->num_children == -1) | |
b6313243 | 1184 | { |
0cc7d26f TT |
1185 | if (var->pretty_printer) |
1186 | { | |
1187 | int dummy; | |
1188 | ||
1189 | /* If we have a dynamic varobj, don't report -1 children. | |
1190 | So, try to fetch some children first. */ | |
1191 | update_dynamic_varobj_children (var, NULL, NULL, NULL, &dummy, | |
1192 | 0, 0, 0); | |
1193 | } | |
1194 | else | |
b6313243 TT |
1195 | var->num_children = number_of_children (var); |
1196 | } | |
8b93c638 | 1197 | |
0cc7d26f | 1198 | return var->num_children >= 0 ? var->num_children : 0; |
8b93c638 JM |
1199 | } |
1200 | ||
1201 | /* Creates a list of the immediate children of a variable object; | |
581e13c1 | 1202 | the return code is the number of such children or -1 on error. */ |
8b93c638 | 1203 | |
d56d46f5 | 1204 | VEC (varobj_p)* |
0cc7d26f | 1205 | varobj_list_children (struct varobj *var, int *from, int *to) |
8b93c638 | 1206 | { |
8b93c638 | 1207 | char *name; |
b6313243 TT |
1208 | int i, children_changed; |
1209 | ||
1210 | var->children_requested = 1; | |
1211 | ||
0cc7d26f TT |
1212 | if (var->pretty_printer) |
1213 | { | |
b6313243 TT |
1214 | /* This, in theory, can result in the number of children changing without |
1215 | frontend noticing. But well, calling -var-list-children on the same | |
1216 | varobj twice is not something a sane frontend would do. */ | |
0cc7d26f TT |
1217 | update_dynamic_varobj_children (var, NULL, NULL, NULL, &children_changed, |
1218 | 0, 0, *to); | |
1219 | restrict_range (var->children, from, to); | |
1220 | return var->children; | |
1221 | } | |
8b93c638 | 1222 | |
8b93c638 JM |
1223 | if (var->num_children == -1) |
1224 | var->num_children = number_of_children (var); | |
1225 | ||
74a44383 DJ |
1226 | /* If that failed, give up. */ |
1227 | if (var->num_children == -1) | |
d56d46f5 | 1228 | return var->children; |
74a44383 | 1229 | |
28335dcc VP |
1230 | /* If we're called when the list of children is not yet initialized, |
1231 | allocate enough elements in it. */ | |
1232 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
1233 | VEC_safe_push (varobj_p, var->children, NULL); | |
1234 | ||
8b93c638 JM |
1235 | for (i = 0; i < var->num_children; i++) |
1236 | { | |
d56d46f5 | 1237 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
1238 | |
1239 | if (existing == NULL) | |
1240 | { | |
1241 | /* Either it's the first call to varobj_list_children for | |
1242 | this variable object, and the child was never created, | |
1243 | or it was explicitly deleted by the client. */ | |
1244 | name = name_of_child (var, i); | |
1245 | existing = create_child (var, i, name); | |
1246 | VEC_replace (varobj_p, var->children, i, existing); | |
1247 | } | |
8b93c638 JM |
1248 | } |
1249 | ||
0cc7d26f | 1250 | restrict_range (var->children, from, to); |
d56d46f5 | 1251 | return var->children; |
8b93c638 JM |
1252 | } |
1253 | ||
d8b65138 JK |
1254 | #if HAVE_PYTHON |
1255 | ||
b6313243 TT |
1256 | static struct varobj * |
1257 | varobj_add_child (struct varobj *var, const char *name, struct value *value) | |
1258 | { | |
1259 | varobj_p v = create_child_with_value (var, | |
1260 | VEC_length (varobj_p, var->children), | |
1261 | name, value); | |
a109c7c1 | 1262 | |
b6313243 | 1263 | VEC_safe_push (varobj_p, var->children, v); |
b6313243 TT |
1264 | return v; |
1265 | } | |
1266 | ||
d8b65138 JK |
1267 | #endif /* HAVE_PYTHON */ |
1268 | ||
8b93c638 | 1269 | /* Obtain the type of an object Variable as a string similar to the one gdb |
581e13c1 | 1270 | prints on the console. */ |
8b93c638 JM |
1271 | |
1272 | char * | |
1273 | varobj_get_type (struct varobj *var) | |
1274 | { | |
581e13c1 | 1275 | /* For the "fake" variables, do not return a type. (It's type is |
8756216b DP |
1276 | NULL, too.) |
1277 | Do not return a type for invalid variables as well. */ | |
1278 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
1279 | return NULL; |
1280 | ||
1a4300e9 | 1281 | return type_to_string (var->type); |
8b93c638 JM |
1282 | } |
1283 | ||
1ecb4ee0 DJ |
1284 | /* Obtain the type of an object variable. */ |
1285 | ||
1286 | struct type * | |
1287 | varobj_get_gdb_type (struct varobj *var) | |
1288 | { | |
1289 | return var->type; | |
1290 | } | |
1291 | ||
02142340 VP |
1292 | /* Return a pointer to the full rooted expression of varobj VAR. |
1293 | If it has not been computed yet, compute it. */ | |
1294 | char * | |
1295 | varobj_get_path_expr (struct varobj *var) | |
1296 | { | |
1297 | if (var->path_expr != NULL) | |
1298 | return var->path_expr; | |
1299 | else | |
1300 | { | |
1301 | /* For root varobjs, we initialize path_expr | |
1302 | when creating varobj, so here it should be | |
1303 | child varobj. */ | |
1304 | gdb_assert (!is_root_p (var)); | |
1305 | return (*var->root->lang->path_expr_of_child) (var); | |
1306 | } | |
1307 | } | |
1308 | ||
8b93c638 JM |
1309 | enum varobj_languages |
1310 | varobj_get_language (struct varobj *var) | |
1311 | { | |
1312 | return variable_language (var); | |
1313 | } | |
1314 | ||
1315 | int | |
1316 | varobj_get_attributes (struct varobj *var) | |
1317 | { | |
1318 | int attributes = 0; | |
1319 | ||
340a7723 | 1320 | if (varobj_editable_p (var)) |
581e13c1 | 1321 | /* FIXME: define masks for attributes. */ |
8b93c638 JM |
1322 | attributes |= 0x00000001; /* Editable */ |
1323 | ||
1324 | return attributes; | |
1325 | } | |
1326 | ||
0cc7d26f TT |
1327 | int |
1328 | varobj_pretty_printed_p (struct varobj *var) | |
1329 | { | |
1330 | return var->pretty_printer != NULL; | |
1331 | } | |
1332 | ||
de051565 MK |
1333 | char * |
1334 | varobj_get_formatted_value (struct varobj *var, | |
1335 | enum varobj_display_formats format) | |
1336 | { | |
1337 | return my_value_of_variable (var, format); | |
1338 | } | |
1339 | ||
8b93c638 JM |
1340 | char * |
1341 | varobj_get_value (struct varobj *var) | |
1342 | { | |
de051565 | 1343 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
1344 | } |
1345 | ||
1346 | /* Set the value of an object variable (if it is editable) to the | |
581e13c1 MS |
1347 | value of the given expression. */ |
1348 | /* Note: Invokes functions that can call error(). */ | |
8b93c638 JM |
1349 | |
1350 | int | |
1351 | varobj_set_value (struct varobj *var, char *expression) | |
1352 | { | |
30b28db1 | 1353 | struct value *val; |
8b93c638 JM |
1354 | |
1355 | /* The argument "expression" contains the variable's new value. | |
581e13c1 MS |
1356 | We need to first construct a legal expression for this -- ugh! */ |
1357 | /* Does this cover all the bases? */ | |
8b93c638 | 1358 | struct expression *exp; |
30b28db1 | 1359 | struct value *value; |
8b93c638 | 1360 | int saved_input_radix = input_radix; |
340a7723 | 1361 | char *s = expression; |
8b93c638 | 1362 | |
340a7723 | 1363 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 1364 | |
581e13c1 | 1365 | input_radix = 10; /* ALWAYS reset to decimal temporarily. */ |
340a7723 NR |
1366 | exp = parse_exp_1 (&s, 0, 0); |
1367 | if (!gdb_evaluate_expression (exp, &value)) | |
1368 | { | |
581e13c1 | 1369 | /* We cannot proceed without a valid expression. */ |
340a7723 NR |
1370 | xfree (exp); |
1371 | return 0; | |
8b93c638 JM |
1372 | } |
1373 | ||
340a7723 NR |
1374 | /* All types that are editable must also be changeable. */ |
1375 | gdb_assert (varobj_value_is_changeable_p (var)); | |
1376 | ||
1377 | /* The value of a changeable variable object must not be lazy. */ | |
1378 | gdb_assert (!value_lazy (var->value)); | |
1379 | ||
1380 | /* Need to coerce the input. We want to check if the | |
1381 | value of the variable object will be different | |
1382 | after assignment, and the first thing value_assign | |
1383 | does is coerce the input. | |
1384 | For example, if we are assigning an array to a pointer variable we | |
b021a221 | 1385 | should compare the pointer with the array's address, not with the |
340a7723 NR |
1386 | array's content. */ |
1387 | value = coerce_array (value); | |
1388 | ||
1389 | /* The new value may be lazy. gdb_value_assign, or | |
1390 | rather value_contents, will take care of this. | |
1391 | If fetching of the new value will fail, gdb_value_assign | |
1392 | with catch the exception. */ | |
1393 | if (!gdb_value_assign (var->value, value, &val)) | |
1394 | return 0; | |
1395 | ||
1396 | /* If the value has changed, record it, so that next -var-update can | |
1397 | report this change. If a variable had a value of '1', we've set it | |
1398 | to '333' and then set again to '1', when -var-update will report this | |
1399 | variable as changed -- because the first assignment has set the | |
1400 | 'updated' flag. There's no need to optimize that, because return value | |
1401 | of -var-update should be considered an approximation. */ | |
581e13c1 | 1402 | var->updated = install_new_value (var, val, 0 /* Compare values. */); |
340a7723 NR |
1403 | input_radix = saved_input_radix; |
1404 | return 1; | |
8b93c638 JM |
1405 | } |
1406 | ||
0cc7d26f TT |
1407 | #if HAVE_PYTHON |
1408 | ||
1409 | /* A helper function to install a constructor function and visualizer | |
1410 | in a varobj. */ | |
1411 | ||
1412 | static void | |
1413 | install_visualizer (struct varobj *var, PyObject *constructor, | |
1414 | PyObject *visualizer) | |
1415 | { | |
1416 | Py_XDECREF (var->constructor); | |
1417 | var->constructor = constructor; | |
1418 | ||
1419 | Py_XDECREF (var->pretty_printer); | |
1420 | var->pretty_printer = visualizer; | |
1421 | ||
1422 | Py_XDECREF (var->child_iter); | |
1423 | var->child_iter = NULL; | |
1424 | } | |
1425 | ||
1426 | /* Install the default visualizer for VAR. */ | |
1427 | ||
1428 | static void | |
1429 | install_default_visualizer (struct varobj *var) | |
1430 | { | |
d65aec65 PM |
1431 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1432 | if (CPLUS_FAKE_CHILD (var)) | |
1433 | return; | |
1434 | ||
0cc7d26f TT |
1435 | if (pretty_printing) |
1436 | { | |
1437 | PyObject *pretty_printer = NULL; | |
1438 | ||
1439 | if (var->value) | |
1440 | { | |
1441 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value); | |
1442 | if (! pretty_printer) | |
1443 | { | |
1444 | gdbpy_print_stack (); | |
1445 | error (_("Cannot instantiate printer for default visualizer")); | |
1446 | } | |
1447 | } | |
1448 | ||
1449 | if (pretty_printer == Py_None) | |
1450 | { | |
1451 | Py_DECREF (pretty_printer); | |
1452 | pretty_printer = NULL; | |
1453 | } | |
1454 | ||
1455 | install_visualizer (var, NULL, pretty_printer); | |
1456 | } | |
1457 | } | |
1458 | ||
1459 | /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to | |
1460 | make a new object. */ | |
1461 | ||
1462 | static void | |
1463 | construct_visualizer (struct varobj *var, PyObject *constructor) | |
1464 | { | |
1465 | PyObject *pretty_printer; | |
1466 | ||
d65aec65 PM |
1467 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
1468 | if (CPLUS_FAKE_CHILD (var)) | |
1469 | return; | |
1470 | ||
0cc7d26f TT |
1471 | Py_INCREF (constructor); |
1472 | if (constructor == Py_None) | |
1473 | pretty_printer = NULL; | |
1474 | else | |
1475 | { | |
1476 | pretty_printer = instantiate_pretty_printer (constructor, var->value); | |
1477 | if (! pretty_printer) | |
1478 | { | |
1479 | gdbpy_print_stack (); | |
1480 | Py_DECREF (constructor); | |
1481 | constructor = Py_None; | |
1482 | Py_INCREF (constructor); | |
1483 | } | |
1484 | ||
1485 | if (pretty_printer == Py_None) | |
1486 | { | |
1487 | Py_DECREF (pretty_printer); | |
1488 | pretty_printer = NULL; | |
1489 | } | |
1490 | } | |
1491 | ||
1492 | install_visualizer (var, constructor, pretty_printer); | |
1493 | } | |
1494 | ||
1495 | #endif /* HAVE_PYTHON */ | |
1496 | ||
1497 | /* A helper function for install_new_value. This creates and installs | |
1498 | a visualizer for VAR, if appropriate. */ | |
1499 | ||
1500 | static void | |
1501 | install_new_value_visualizer (struct varobj *var) | |
1502 | { | |
1503 | #if HAVE_PYTHON | |
1504 | /* If the constructor is None, then we want the raw value. If VAR | |
1505 | does not have a value, just skip this. */ | |
1506 | if (var->constructor != Py_None && var->value) | |
1507 | { | |
1508 | struct cleanup *cleanup; | |
0cc7d26f TT |
1509 | |
1510 | cleanup = varobj_ensure_python_env (var); | |
1511 | ||
1512 | if (!var->constructor) | |
1513 | install_default_visualizer (var); | |
1514 | else | |
1515 | construct_visualizer (var, var->constructor); | |
1516 | ||
1517 | do_cleanups (cleanup); | |
1518 | } | |
1519 | #else | |
1520 | /* Do nothing. */ | |
1521 | #endif | |
1522 | } | |
1523 | ||
acd65feb VP |
1524 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
1525 | this is the first assignement after the variable object was just | |
1526 | created, or changed type. In that case, just assign the value | |
1527 | and return 0. | |
581e13c1 MS |
1528 | Otherwise, assign the new value, and return 1 if the value is |
1529 | different from the current one, 0 otherwise. The comparison is | |
1530 | done on textual representation of value. Therefore, some types | |
1531 | need not be compared. E.g. for structures the reported value is | |
1532 | always "{...}", so no comparison is necessary here. If the old | |
1533 | value was NULL and new one is not, or vice versa, we always return 1. | |
b26ed50d VP |
1534 | |
1535 | The VALUE parameter should not be released -- the function will | |
1536 | take care of releasing it when needed. */ | |
acd65feb VP |
1537 | static int |
1538 | install_new_value (struct varobj *var, struct value *value, int initial) | |
1539 | { | |
1540 | int changeable; | |
1541 | int need_to_fetch; | |
1542 | int changed = 0; | |
25d5ea92 | 1543 | int intentionally_not_fetched = 0; |
7a4d50bf | 1544 | char *print_value = NULL; |
acd65feb | 1545 | |
acd65feb | 1546 | /* We need to know the varobj's type to decide if the value should |
3e43a32a | 1547 | be fetched or not. C++ fake children (public/protected/private) |
581e13c1 | 1548 | don't have a type. */ |
acd65feb | 1549 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); |
b2c2bd75 | 1550 | changeable = varobj_value_is_changeable_p (var); |
b6313243 TT |
1551 | |
1552 | /* If the type has custom visualizer, we consider it to be always | |
581e13c1 | 1553 | changeable. FIXME: need to make sure this behaviour will not |
b6313243 TT |
1554 | mess up read-sensitive values. */ |
1555 | if (var->pretty_printer) | |
1556 | changeable = 1; | |
1557 | ||
acd65feb VP |
1558 | need_to_fetch = changeable; |
1559 | ||
b26ed50d VP |
1560 | /* We are not interested in the address of references, and given |
1561 | that in C++ a reference is not rebindable, it cannot | |
1562 | meaningfully change. So, get hold of the real value. */ | |
1563 | if (value) | |
0cc7d26f | 1564 | value = coerce_ref (value); |
b26ed50d | 1565 | |
acd65feb VP |
1566 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1567 | /* For unions, we need to fetch the value implicitly because | |
1568 | of implementation of union member fetch. When gdb | |
1569 | creates a value for a field and the value of the enclosing | |
1570 | structure is not lazy, it immediately copies the necessary | |
1571 | bytes from the enclosing values. If the enclosing value is | |
1572 | lazy, the call to value_fetch_lazy on the field will read | |
1573 | the data from memory. For unions, that means we'll read the | |
1574 | same memory more than once, which is not desirable. So | |
1575 | fetch now. */ | |
1576 | need_to_fetch = 1; | |
1577 | ||
1578 | /* The new value might be lazy. If the type is changeable, | |
1579 | that is we'll be comparing values of this type, fetch the | |
1580 | value now. Otherwise, on the next update the old value | |
1581 | will be lazy, which means we've lost that old value. */ | |
1582 | if (need_to_fetch && value && value_lazy (value)) | |
1583 | { | |
25d5ea92 VP |
1584 | struct varobj *parent = var->parent; |
1585 | int frozen = var->frozen; | |
a109c7c1 | 1586 | |
25d5ea92 VP |
1587 | for (; !frozen && parent; parent = parent->parent) |
1588 | frozen |= parent->frozen; | |
1589 | ||
1590 | if (frozen && initial) | |
1591 | { | |
1592 | /* For variables that are frozen, or are children of frozen | |
1593 | variables, we don't do fetch on initial assignment. | |
1594 | For non-initial assignemnt we do the fetch, since it means we're | |
1595 | explicitly asked to compare the new value with the old one. */ | |
1596 | intentionally_not_fetched = 1; | |
1597 | } | |
1598 | else if (!gdb_value_fetch_lazy (value)) | |
acd65feb | 1599 | { |
acd65feb VP |
1600 | /* Set the value to NULL, so that for the next -var-update, |
1601 | we don't try to compare the new value with this value, | |
1602 | that we couldn't even read. */ | |
1603 | value = NULL; | |
1604 | } | |
acd65feb VP |
1605 | } |
1606 | ||
b6313243 | 1607 | |
7a4d50bf VP |
1608 | /* Below, we'll be comparing string rendering of old and new |
1609 | values. Don't get string rendering if the value is | |
1610 | lazy -- if it is, the code above has decided that the value | |
1611 | should not be fetched. */ | |
0cc7d26f | 1612 | if (value && !value_lazy (value) && !var->pretty_printer) |
d452c4bc | 1613 | print_value = value_get_print_value (value, var->format, var); |
7a4d50bf | 1614 | |
acd65feb VP |
1615 | /* If the type is changeable, compare the old and the new values. |
1616 | If this is the initial assignment, we don't have any old value | |
1617 | to compare with. */ | |
7a4d50bf | 1618 | if (!initial && changeable) |
acd65feb | 1619 | { |
3e43a32a MS |
1620 | /* If the value of the varobj was changed by -var-set-value, |
1621 | then the value in the varobj and in the target is the same. | |
1622 | However, that value is different from the value that the | |
581e13c1 | 1623 | varobj had after the previous -var-update. So need to the |
3e43a32a | 1624 | varobj as changed. */ |
acd65feb | 1625 | if (var->updated) |
57e66780 | 1626 | { |
57e66780 DJ |
1627 | changed = 1; |
1628 | } | |
0cc7d26f | 1629 | else if (! var->pretty_printer) |
acd65feb VP |
1630 | { |
1631 | /* Try to compare the values. That requires that both | |
1632 | values are non-lazy. */ | |
25d5ea92 VP |
1633 | if (var->not_fetched && value_lazy (var->value)) |
1634 | { | |
1635 | /* This is a frozen varobj and the value was never read. | |
1636 | Presumably, UI shows some "never read" indicator. | |
1637 | Now that we've fetched the real value, we need to report | |
1638 | this varobj as changed so that UI can show the real | |
1639 | value. */ | |
1640 | changed = 1; | |
1641 | } | |
1642 | else if (var->value == NULL && value == NULL) | |
581e13c1 | 1643 | /* Equal. */ |
acd65feb VP |
1644 | ; |
1645 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1646 | { |
57e66780 DJ |
1647 | changed = 1; |
1648 | } | |
acd65feb VP |
1649 | else |
1650 | { | |
1651 | gdb_assert (!value_lazy (var->value)); | |
1652 | gdb_assert (!value_lazy (value)); | |
85265413 | 1653 | |
57e66780 | 1654 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1655 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1656 | changed = 1; |
acd65feb VP |
1657 | } |
1658 | } | |
1659 | } | |
85265413 | 1660 | |
ee342b23 VP |
1661 | if (!initial && !changeable) |
1662 | { | |
1663 | /* For values that are not changeable, we don't compare the values. | |
1664 | However, we want to notice if a value was not NULL and now is NULL, | |
1665 | or vise versa, so that we report when top-level varobjs come in scope | |
1666 | and leave the scope. */ | |
1667 | changed = (var->value != NULL) != (value != NULL); | |
1668 | } | |
1669 | ||
acd65feb | 1670 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1671 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1672 | value_free (var->value); |
1673 | var->value = value; | |
0cc7d26f TT |
1674 | if (value != NULL) |
1675 | value_incref (value); | |
25d5ea92 VP |
1676 | if (value && value_lazy (value) && intentionally_not_fetched) |
1677 | var->not_fetched = 1; | |
1678 | else | |
1679 | var->not_fetched = 0; | |
acd65feb | 1680 | var->updated = 0; |
85265413 | 1681 | |
0cc7d26f TT |
1682 | install_new_value_visualizer (var); |
1683 | ||
1684 | /* If we installed a pretty-printer, re-compare the printed version | |
1685 | to see if the variable changed. */ | |
1686 | if (var->pretty_printer) | |
1687 | { | |
1688 | xfree (print_value); | |
1689 | print_value = value_get_print_value (var->value, var->format, var); | |
e8f781e2 TT |
1690 | if ((var->print_value == NULL && print_value != NULL) |
1691 | || (var->print_value != NULL && print_value == NULL) | |
1692 | || (var->print_value != NULL && print_value != NULL | |
1693 | && strcmp (var->print_value, print_value) != 0)) | |
0cc7d26f TT |
1694 | changed = 1; |
1695 | } | |
1696 | if (var->print_value) | |
1697 | xfree (var->print_value); | |
1698 | var->print_value = print_value; | |
1699 | ||
b26ed50d | 1700 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1701 | |
1702 | return changed; | |
1703 | } | |
acd65feb | 1704 | |
0cc7d26f TT |
1705 | /* Return the requested range for a varobj. VAR is the varobj. FROM |
1706 | and TO are out parameters; *FROM and *TO will be set to the | |
1707 | selected sub-range of VAR. If no range was selected using | |
1708 | -var-set-update-range, then both will be -1. */ | |
1709 | void | |
1710 | varobj_get_child_range (struct varobj *var, int *from, int *to) | |
b6313243 | 1711 | { |
0cc7d26f TT |
1712 | *from = var->from; |
1713 | *to = var->to; | |
b6313243 TT |
1714 | } |
1715 | ||
0cc7d26f TT |
1716 | /* Set the selected sub-range of children of VAR to start at index |
1717 | FROM and end at index TO. If either FROM or TO is less than zero, | |
1718 | this is interpreted as a request for all children. */ | |
1719 | void | |
1720 | varobj_set_child_range (struct varobj *var, int from, int to) | |
b6313243 | 1721 | { |
0cc7d26f TT |
1722 | var->from = from; |
1723 | var->to = to; | |
b6313243 TT |
1724 | } |
1725 | ||
1726 | void | |
1727 | varobj_set_visualizer (struct varobj *var, const char *visualizer) | |
1728 | { | |
1729 | #if HAVE_PYTHON | |
34fa1d9d MS |
1730 | PyObject *mainmod, *globals, *constructor; |
1731 | struct cleanup *back_to; | |
b6313243 | 1732 | |
d452c4bc | 1733 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
1734 | |
1735 | mainmod = PyImport_AddModule ("__main__"); | |
1736 | globals = PyModule_GetDict (mainmod); | |
1737 | Py_INCREF (globals); | |
1738 | make_cleanup_py_decref (globals); | |
1739 | ||
1740 | constructor = PyRun_String (visualizer, Py_eval_input, globals, globals); | |
b6313243 | 1741 | |
0cc7d26f | 1742 | if (! constructor) |
b6313243 TT |
1743 | { |
1744 | gdbpy_print_stack (); | |
da1f2771 | 1745 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
b6313243 TT |
1746 | } |
1747 | ||
0cc7d26f TT |
1748 | construct_visualizer (var, constructor); |
1749 | Py_XDECREF (constructor); | |
b6313243 | 1750 | |
0cc7d26f TT |
1751 | /* If there are any children now, wipe them. */ |
1752 | varobj_delete (var, NULL, 1 /* children only */); | |
1753 | var->num_children = -1; | |
b6313243 TT |
1754 | |
1755 | do_cleanups (back_to); | |
1756 | #else | |
da1f2771 | 1757 | error (_("Python support required")); |
b6313243 TT |
1758 | #endif |
1759 | } | |
1760 | ||
8b93c638 JM |
1761 | /* Update the values for a variable and its children. This is a |
1762 | two-pronged attack. First, re-parse the value for the root's | |
1763 | expression to see if it's changed. Then go all the way | |
1764 | through its children, reconstructing them and noting if they've | |
1765 | changed. | |
1766 | ||
25d5ea92 VP |
1767 | The EXPLICIT parameter specifies if this call is result |
1768 | of MI request to update this specific variable, or | |
581e13c1 | 1769 | result of implicit -var-update *. For implicit request, we don't |
25d5ea92 | 1770 | update frozen variables. |
705da579 | 1771 | |
581e13c1 | 1772 | NOTE: This function may delete the caller's varobj. If it |
8756216b DP |
1773 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1774 | to point to the new varobj. */ | |
8b93c638 | 1775 | |
f7f9ae2c | 1776 | VEC(varobj_update_result) *varobj_update (struct varobj **varp, int explicit) |
8b93c638 JM |
1777 | { |
1778 | int changed = 0; | |
25d5ea92 | 1779 | int type_changed = 0; |
8b93c638 | 1780 | int i; |
30b28db1 | 1781 | struct value *new; |
b6313243 | 1782 | VEC (varobj_update_result) *stack = NULL; |
f7f9ae2c | 1783 | VEC (varobj_update_result) *result = NULL; |
8b93c638 | 1784 | |
25d5ea92 VP |
1785 | /* Frozen means frozen -- we don't check for any change in |
1786 | this varobj, including its going out of scope, or | |
1787 | changing type. One use case for frozen varobjs is | |
1788 | retaining previously evaluated expressions, and we don't | |
1789 | want them to be reevaluated at all. */ | |
1790 | if (!explicit && (*varp)->frozen) | |
f7f9ae2c | 1791 | return result; |
8756216b DP |
1792 | |
1793 | if (!(*varp)->root->is_valid) | |
f7f9ae2c | 1794 | { |
cfce2ea2 | 1795 | varobj_update_result r = {0}; |
a109c7c1 | 1796 | |
cfce2ea2 | 1797 | r.varobj = *varp; |
f7f9ae2c VP |
1798 | r.status = VAROBJ_INVALID; |
1799 | VEC_safe_push (varobj_update_result, result, &r); | |
1800 | return result; | |
1801 | } | |
8b93c638 | 1802 | |
25d5ea92 | 1803 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1804 | { |
cfce2ea2 | 1805 | varobj_update_result r = {0}; |
a109c7c1 | 1806 | |
cfce2ea2 | 1807 | r.varobj = *varp; |
f7f9ae2c VP |
1808 | r.status = VAROBJ_IN_SCOPE; |
1809 | ||
581e13c1 | 1810 | /* Update the root variable. value_of_root can return NULL |
25d5ea92 | 1811 | if the variable is no longer around, i.e. we stepped out of |
581e13c1 | 1812 | the frame in which a local existed. We are letting the |
25d5ea92 VP |
1813 | value_of_root variable dispose of the varobj if the type |
1814 | has changed. */ | |
25d5ea92 | 1815 | new = value_of_root (varp, &type_changed); |
f7f9ae2c VP |
1816 | r.varobj = *varp; |
1817 | ||
1818 | r.type_changed = type_changed; | |
ea56f9c2 | 1819 | if (install_new_value ((*varp), new, type_changed)) |
f7f9ae2c | 1820 | r.changed = 1; |
ea56f9c2 | 1821 | |
25d5ea92 | 1822 | if (new == NULL) |
f7f9ae2c | 1823 | r.status = VAROBJ_NOT_IN_SCOPE; |
b6313243 | 1824 | r.value_installed = 1; |
f7f9ae2c VP |
1825 | |
1826 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
b6313243 | 1827 | { |
0b4bc29a JK |
1828 | if (r.type_changed || r.changed) |
1829 | VEC_safe_push (varobj_update_result, result, &r); | |
b6313243 TT |
1830 | return result; |
1831 | } | |
1832 | ||
1833 | VEC_safe_push (varobj_update_result, stack, &r); | |
1834 | } | |
1835 | else | |
1836 | { | |
cfce2ea2 | 1837 | varobj_update_result r = {0}; |
a109c7c1 | 1838 | |
cfce2ea2 | 1839 | r.varobj = *varp; |
b6313243 | 1840 | VEC_safe_push (varobj_update_result, stack, &r); |
b20d8971 | 1841 | } |
8b93c638 | 1842 | |
8756216b | 1843 | /* Walk through the children, reconstructing them all. */ |
b6313243 | 1844 | while (!VEC_empty (varobj_update_result, stack)) |
8b93c638 | 1845 | { |
b6313243 TT |
1846 | varobj_update_result r = *(VEC_last (varobj_update_result, stack)); |
1847 | struct varobj *v = r.varobj; | |
1848 | ||
1849 | VEC_pop (varobj_update_result, stack); | |
1850 | ||
1851 | /* Update this variable, unless it's a root, which is already | |
1852 | updated. */ | |
1853 | if (!r.value_installed) | |
1854 | { | |
1855 | new = value_of_child (v->parent, v->index); | |
1856 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1857 | { | |
1858 | r.changed = 1; | |
1859 | v->updated = 0; | |
1860 | } | |
1861 | } | |
1862 | ||
1863 | /* We probably should not get children of a varobj that has a | |
1864 | pretty-printer, but for which -var-list-children was never | |
581e13c1 | 1865 | invoked. */ |
b6313243 TT |
1866 | if (v->pretty_printer) |
1867 | { | |
0cc7d26f | 1868 | VEC (varobj_p) *changed = 0, *new = 0, *unchanged = 0; |
26f9bcee | 1869 | int i, children_changed = 0; |
b6313243 TT |
1870 | |
1871 | if (v->frozen) | |
1872 | continue; | |
1873 | ||
0cc7d26f TT |
1874 | if (!v->children_requested) |
1875 | { | |
1876 | int dummy; | |
1877 | ||
1878 | /* If we initially did not have potential children, but | |
1879 | now we do, consider the varobj as changed. | |
1880 | Otherwise, if children were never requested, consider | |
1881 | it as unchanged -- presumably, such varobj is not yet | |
1882 | expanded in the UI, so we need not bother getting | |
1883 | it. */ | |
1884 | if (!varobj_has_more (v, 0)) | |
1885 | { | |
1886 | update_dynamic_varobj_children (v, NULL, NULL, NULL, | |
1887 | &dummy, 0, 0, 0); | |
1888 | if (varobj_has_more (v, 0)) | |
1889 | r.changed = 1; | |
1890 | } | |
1891 | ||
1892 | if (r.changed) | |
1893 | VEC_safe_push (varobj_update_result, result, &r); | |
1894 | ||
1895 | continue; | |
1896 | } | |
1897 | ||
b6313243 TT |
1898 | /* If update_dynamic_varobj_children returns 0, then we have |
1899 | a non-conforming pretty-printer, so we skip it. */ | |
0cc7d26f TT |
1900 | if (update_dynamic_varobj_children (v, &changed, &new, &unchanged, |
1901 | &children_changed, 1, | |
1902 | v->from, v->to)) | |
b6313243 | 1903 | { |
0cc7d26f | 1904 | if (children_changed || new) |
b6313243 | 1905 | { |
0cc7d26f TT |
1906 | r.children_changed = 1; |
1907 | r.new = new; | |
b6313243 | 1908 | } |
0cc7d26f TT |
1909 | /* Push in reverse order so that the first child is |
1910 | popped from the work stack first, and so will be | |
1911 | added to result first. This does not affect | |
1912 | correctness, just "nicer". */ | |
1913 | for (i = VEC_length (varobj_p, changed) - 1; i >= 0; --i) | |
b6313243 | 1914 | { |
0cc7d26f | 1915 | varobj_p tmp = VEC_index (varobj_p, changed, i); |
cfce2ea2 | 1916 | varobj_update_result r = {0}; |
a109c7c1 | 1917 | |
cfce2ea2 | 1918 | r.varobj = tmp; |
0cc7d26f | 1919 | r.changed = 1; |
b6313243 TT |
1920 | r.value_installed = 1; |
1921 | VEC_safe_push (varobj_update_result, stack, &r); | |
1922 | } | |
0cc7d26f TT |
1923 | for (i = VEC_length (varobj_p, unchanged) - 1; i >= 0; --i) |
1924 | { | |
1925 | varobj_p tmp = VEC_index (varobj_p, unchanged, i); | |
a109c7c1 | 1926 | |
0cc7d26f TT |
1927 | if (!tmp->frozen) |
1928 | { | |
cfce2ea2 | 1929 | varobj_update_result r = {0}; |
a109c7c1 | 1930 | |
cfce2ea2 | 1931 | r.varobj = tmp; |
0cc7d26f TT |
1932 | r.value_installed = 1; |
1933 | VEC_safe_push (varobj_update_result, stack, &r); | |
1934 | } | |
1935 | } | |
b6313243 TT |
1936 | if (r.changed || r.children_changed) |
1937 | VEC_safe_push (varobj_update_result, result, &r); | |
0cc7d26f TT |
1938 | |
1939 | /* Free CHANGED and UNCHANGED, but not NEW, because NEW | |
1940 | has been put into the result vector. */ | |
1941 | VEC_free (varobj_p, changed); | |
1942 | VEC_free (varobj_p, unchanged); | |
1943 | ||
b6313243 TT |
1944 | continue; |
1945 | } | |
1946 | } | |
28335dcc VP |
1947 | |
1948 | /* Push any children. Use reverse order so that the first | |
1949 | child is popped from the work stack first, and so | |
1950 | will be added to result first. This does not | |
1951 | affect correctness, just "nicer". */ | |
1952 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1953 | { |
28335dcc | 1954 | varobj_p c = VEC_index (varobj_p, v->children, i); |
a109c7c1 | 1955 | |
28335dcc | 1956 | /* Child may be NULL if explicitly deleted by -var-delete. */ |
25d5ea92 | 1957 | if (c != NULL && !c->frozen) |
28335dcc | 1958 | { |
cfce2ea2 | 1959 | varobj_update_result r = {0}; |
a109c7c1 | 1960 | |
cfce2ea2 | 1961 | r.varobj = c; |
b6313243 | 1962 | VEC_safe_push (varobj_update_result, stack, &r); |
28335dcc | 1963 | } |
8b93c638 | 1964 | } |
b6313243 TT |
1965 | |
1966 | if (r.changed || r.type_changed) | |
1967 | VEC_safe_push (varobj_update_result, result, &r); | |
8b93c638 JM |
1968 | } |
1969 | ||
b6313243 TT |
1970 | VEC_free (varobj_update_result, stack); |
1971 | ||
f7f9ae2c | 1972 | return result; |
8b93c638 JM |
1973 | } |
1974 | \f | |
1975 | ||
1976 | /* Helper functions */ | |
1977 | ||
1978 | /* | |
1979 | * Variable object construction/destruction | |
1980 | */ | |
1981 | ||
1982 | static int | |
fba45db2 KB |
1983 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1984 | int only_children_p) | |
8b93c638 JM |
1985 | { |
1986 | int delcount = 0; | |
1987 | ||
1988 | delete_variable_1 (resultp, &delcount, var, | |
1989 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1990 | ||
1991 | return delcount; | |
1992 | } | |
1993 | ||
581e13c1 | 1994 | /* Delete the variable object VAR and its children. */ |
8b93c638 JM |
1995 | /* IMPORTANT NOTE: If we delete a variable which is a child |
1996 | and the parent is not removed we dump core. It must be always | |
581e13c1 | 1997 | initially called with remove_from_parent_p set. */ |
8b93c638 | 1998 | static void |
72330bd6 AC |
1999 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
2000 | struct varobj *var, int only_children_p, | |
2001 | int remove_from_parent_p) | |
8b93c638 | 2002 | { |
28335dcc | 2003 | int i; |
8b93c638 | 2004 | |
581e13c1 | 2005 | /* Delete any children of this variable, too. */ |
28335dcc VP |
2006 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
2007 | { | |
2008 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
a109c7c1 | 2009 | |
214270ab VP |
2010 | if (!child) |
2011 | continue; | |
8b93c638 | 2012 | if (!remove_from_parent_p) |
28335dcc VP |
2013 | child->parent = NULL; |
2014 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 2015 | } |
28335dcc | 2016 | VEC_free (varobj_p, var->children); |
8b93c638 | 2017 | |
581e13c1 | 2018 | /* if we were called to delete only the children we are done here. */ |
8b93c638 JM |
2019 | if (only_children_p) |
2020 | return; | |
2021 | ||
581e13c1 | 2022 | /* Otherwise, add it to the list of deleted ones and proceed to do so. */ |
73a93a32 | 2023 | /* If the name is null, this is a temporary variable, that has not |
581e13c1 | 2024 | yet been installed, don't report it, it belongs to the caller... */ |
73a93a32 | 2025 | if (var->obj_name != NULL) |
8b93c638 | 2026 | { |
5b616ba1 | 2027 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
2028 | *delcountp = *delcountp + 1; |
2029 | } | |
2030 | ||
581e13c1 | 2031 | /* If this variable has a parent, remove it from its parent's list. */ |
8b93c638 JM |
2032 | /* OPTIMIZATION: if the parent of this variable is also being deleted, |
2033 | (as indicated by remove_from_parent_p) we don't bother doing an | |
2034 | expensive list search to find the element to remove when we are | |
581e13c1 | 2035 | discarding the list afterwards. */ |
72330bd6 | 2036 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 2037 | { |
28335dcc | 2038 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 2039 | } |
72330bd6 | 2040 | |
73a93a32 JI |
2041 | if (var->obj_name != NULL) |
2042 | uninstall_variable (var); | |
8b93c638 | 2043 | |
581e13c1 | 2044 | /* Free memory associated with this variable. */ |
8b93c638 JM |
2045 | free_variable (var); |
2046 | } | |
2047 | ||
581e13c1 | 2048 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ |
8b93c638 | 2049 | static int |
fba45db2 | 2050 | install_variable (struct varobj *var) |
8b93c638 JM |
2051 | { |
2052 | struct vlist *cv; | |
2053 | struct vlist *newvl; | |
2054 | const char *chp; | |
2055 | unsigned int index = 0; | |
2056 | unsigned int i = 1; | |
2057 | ||
2058 | for (chp = var->obj_name; *chp; chp++) | |
2059 | { | |
2060 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
2061 | } | |
2062 | ||
2063 | cv = *(varobj_table + index); | |
2064 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
2065 | cv = cv->next; | |
2066 | ||
2067 | if (cv != NULL) | |
8a3fe4f8 | 2068 | error (_("Duplicate variable object name")); |
8b93c638 | 2069 | |
581e13c1 | 2070 | /* Add varobj to hash table. */ |
8b93c638 JM |
2071 | newvl = xmalloc (sizeof (struct vlist)); |
2072 | newvl->next = *(varobj_table + index); | |
2073 | newvl->var = var; | |
2074 | *(varobj_table + index) = newvl; | |
2075 | ||
581e13c1 | 2076 | /* If root, add varobj to root list. */ |
b2c2bd75 | 2077 | if (is_root_p (var)) |
8b93c638 | 2078 | { |
581e13c1 | 2079 | /* Add to list of root variables. */ |
8b93c638 JM |
2080 | if (rootlist == NULL) |
2081 | var->root->next = NULL; | |
2082 | else | |
2083 | var->root->next = rootlist; | |
2084 | rootlist = var->root; | |
8b93c638 JM |
2085 | } |
2086 | ||
2087 | return 1; /* OK */ | |
2088 | } | |
2089 | ||
581e13c1 | 2090 | /* Unistall the object VAR. */ |
8b93c638 | 2091 | static void |
fba45db2 | 2092 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
2093 | { |
2094 | struct vlist *cv; | |
2095 | struct vlist *prev; | |
2096 | struct varobj_root *cr; | |
2097 | struct varobj_root *prer; | |
2098 | const char *chp; | |
2099 | unsigned int index = 0; | |
2100 | unsigned int i = 1; | |
2101 | ||
581e13c1 | 2102 | /* Remove varobj from hash table. */ |
8b93c638 JM |
2103 | for (chp = var->obj_name; *chp; chp++) |
2104 | { | |
2105 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
2106 | } | |
2107 | ||
2108 | cv = *(varobj_table + index); | |
2109 | prev = NULL; | |
2110 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
2111 | { | |
2112 | prev = cv; | |
2113 | cv = cv->next; | |
2114 | } | |
2115 | ||
2116 | if (varobjdebug) | |
2117 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
2118 | ||
2119 | if (cv == NULL) | |
2120 | { | |
72330bd6 AC |
2121 | warning |
2122 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
2123 | var->obj_name); | |
8b93c638 JM |
2124 | return; |
2125 | } | |
2126 | ||
2127 | if (prev == NULL) | |
2128 | *(varobj_table + index) = cv->next; | |
2129 | else | |
2130 | prev->next = cv->next; | |
2131 | ||
b8c9b27d | 2132 | xfree (cv); |
8b93c638 | 2133 | |
581e13c1 | 2134 | /* If root, remove varobj from root list. */ |
b2c2bd75 | 2135 | if (is_root_p (var)) |
8b93c638 | 2136 | { |
581e13c1 | 2137 | /* Remove from list of root variables. */ |
8b93c638 JM |
2138 | if (rootlist == var->root) |
2139 | rootlist = var->root->next; | |
2140 | else | |
2141 | { | |
2142 | prer = NULL; | |
2143 | cr = rootlist; | |
2144 | while ((cr != NULL) && (cr->rootvar != var)) | |
2145 | { | |
2146 | prer = cr; | |
2147 | cr = cr->next; | |
2148 | } | |
2149 | if (cr == NULL) | |
2150 | { | |
8f7e195f JB |
2151 | warning (_("Assertion failed: Could not find " |
2152 | "varobj \"%s\" in root list"), | |
3e43a32a | 2153 | var->obj_name); |
8b93c638 JM |
2154 | return; |
2155 | } | |
2156 | if (prer == NULL) | |
2157 | rootlist = NULL; | |
2158 | else | |
2159 | prer->next = cr->next; | |
2160 | } | |
8b93c638 JM |
2161 | } |
2162 | ||
2163 | } | |
2164 | ||
581e13c1 | 2165 | /* Create and install a child of the parent of the given name. */ |
8b93c638 | 2166 | static struct varobj * |
fba45db2 | 2167 | create_child (struct varobj *parent, int index, char *name) |
b6313243 TT |
2168 | { |
2169 | return create_child_with_value (parent, index, name, | |
2170 | value_of_child (parent, index)); | |
2171 | } | |
2172 | ||
2173 | static struct varobj * | |
2174 | create_child_with_value (struct varobj *parent, int index, const char *name, | |
2175 | struct value *value) | |
8b93c638 JM |
2176 | { |
2177 | struct varobj *child; | |
2178 | char *childs_name; | |
2179 | ||
2180 | child = new_variable (); | |
2181 | ||
581e13c1 | 2182 | /* Name is allocated by name_of_child. */ |
b6313243 TT |
2183 | /* FIXME: xstrdup should not be here. */ |
2184 | child->name = xstrdup (name); | |
8b93c638 | 2185 | child->index = index; |
8b93c638 JM |
2186 | child->parent = parent; |
2187 | child->root = parent->root; | |
b435e160 | 2188 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
2189 | child->obj_name = childs_name; |
2190 | install_variable (child); | |
2191 | ||
acd65feb VP |
2192 | /* Compute the type of the child. Must do this before |
2193 | calling install_new_value. */ | |
2194 | if (value != NULL) | |
2195 | /* If the child had no evaluation errors, var->value | |
581e13c1 | 2196 | will be non-NULL and contain a valid type. */ |
acd65feb VP |
2197 | child->type = value_type (value); |
2198 | else | |
581e13c1 | 2199 | /* Otherwise, we must compute the type. */ |
acd65feb VP |
2200 | child->type = (*child->root->lang->type_of_child) (child->parent, |
2201 | child->index); | |
2202 | install_new_value (child, value, 1); | |
2203 | ||
8b93c638 JM |
2204 | return child; |
2205 | } | |
8b93c638 JM |
2206 | \f |
2207 | ||
2208 | /* | |
2209 | * Miscellaneous utility functions. | |
2210 | */ | |
2211 | ||
581e13c1 | 2212 | /* Allocate memory and initialize a new variable. */ |
8b93c638 JM |
2213 | static struct varobj * |
2214 | new_variable (void) | |
2215 | { | |
2216 | struct varobj *var; | |
2217 | ||
2218 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
2219 | var->name = NULL; | |
02142340 | 2220 | var->path_expr = NULL; |
8b93c638 JM |
2221 | var->obj_name = NULL; |
2222 | var->index = -1; | |
2223 | var->type = NULL; | |
2224 | var->value = NULL; | |
8b93c638 JM |
2225 | var->num_children = -1; |
2226 | var->parent = NULL; | |
2227 | var->children = NULL; | |
2228 | var->format = 0; | |
2229 | var->root = NULL; | |
fb9b6b35 | 2230 | var->updated = 0; |
85265413 | 2231 | var->print_value = NULL; |
25d5ea92 VP |
2232 | var->frozen = 0; |
2233 | var->not_fetched = 0; | |
b6313243 | 2234 | var->children_requested = 0; |
0cc7d26f TT |
2235 | var->from = -1; |
2236 | var->to = -1; | |
2237 | var->constructor = 0; | |
b6313243 | 2238 | var->pretty_printer = 0; |
0cc7d26f TT |
2239 | var->child_iter = 0; |
2240 | var->saved_item = 0; | |
8b93c638 JM |
2241 | |
2242 | return var; | |
2243 | } | |
2244 | ||
581e13c1 | 2245 | /* Allocate memory and initialize a new root variable. */ |
8b93c638 JM |
2246 | static struct varobj * |
2247 | new_root_variable (void) | |
2248 | { | |
2249 | struct varobj *var = new_variable (); | |
a109c7c1 | 2250 | |
3e43a32a | 2251 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root)); |
8b93c638 JM |
2252 | var->root->lang = NULL; |
2253 | var->root->exp = NULL; | |
2254 | var->root->valid_block = NULL; | |
7a424e99 | 2255 | var->root->frame = null_frame_id; |
a5defcdc | 2256 | var->root->floating = 0; |
8b93c638 | 2257 | var->root->rootvar = NULL; |
8756216b | 2258 | var->root->is_valid = 1; |
8b93c638 JM |
2259 | |
2260 | return var; | |
2261 | } | |
2262 | ||
581e13c1 | 2263 | /* Free any allocated memory associated with VAR. */ |
8b93c638 | 2264 | static void |
fba45db2 | 2265 | free_variable (struct varobj *var) |
8b93c638 | 2266 | { |
d452c4bc UW |
2267 | #if HAVE_PYTHON |
2268 | if (var->pretty_printer) | |
2269 | { | |
2270 | struct cleanup *cleanup = varobj_ensure_python_env (var); | |
0cc7d26f TT |
2271 | Py_XDECREF (var->constructor); |
2272 | Py_XDECREF (var->pretty_printer); | |
2273 | Py_XDECREF (var->child_iter); | |
2274 | Py_XDECREF (var->saved_item); | |
d452c4bc UW |
2275 | do_cleanups (cleanup); |
2276 | } | |
2277 | #endif | |
2278 | ||
36746093 JK |
2279 | value_free (var->value); |
2280 | ||
581e13c1 | 2281 | /* Free the expression if this is a root variable. */ |
b2c2bd75 | 2282 | if (is_root_p (var)) |
8b93c638 | 2283 | { |
3038237c | 2284 | xfree (var->root->exp); |
8038e1e2 | 2285 | xfree (var->root); |
8b93c638 JM |
2286 | } |
2287 | ||
8038e1e2 AC |
2288 | xfree (var->name); |
2289 | xfree (var->obj_name); | |
85265413 | 2290 | xfree (var->print_value); |
02142340 | 2291 | xfree (var->path_expr); |
8038e1e2 | 2292 | xfree (var); |
8b93c638 JM |
2293 | } |
2294 | ||
74b7792f AC |
2295 | static void |
2296 | do_free_variable_cleanup (void *var) | |
2297 | { | |
2298 | free_variable (var); | |
2299 | } | |
2300 | ||
2301 | static struct cleanup * | |
2302 | make_cleanup_free_variable (struct varobj *var) | |
2303 | { | |
2304 | return make_cleanup (do_free_variable_cleanup, var); | |
2305 | } | |
2306 | ||
581e13c1 | 2307 | /* This returns the type of the variable. It also skips past typedefs |
6766a268 | 2308 | to return the real type of the variable. |
94b66fa7 KS |
2309 | |
2310 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
581e13c1 | 2311 | except within get_target_type and get_type. */ |
8b93c638 | 2312 | static struct type * |
fba45db2 | 2313 | get_type (struct varobj *var) |
8b93c638 JM |
2314 | { |
2315 | struct type *type; | |
8b93c638 | 2316 | |
a109c7c1 | 2317 | type = var->type; |
6766a268 DJ |
2318 | if (type != NULL) |
2319 | type = check_typedef (type); | |
8b93c638 JM |
2320 | |
2321 | return type; | |
2322 | } | |
2323 | ||
6e2a9270 VP |
2324 | /* Return the type of the value that's stored in VAR, |
2325 | or that would have being stored there if the | |
581e13c1 | 2326 | value were accessible. |
6e2a9270 VP |
2327 | |
2328 | This differs from VAR->type in that VAR->type is always | |
2329 | the true type of the expession in the source language. | |
2330 | The return value of this function is the type we're | |
2331 | actually storing in varobj, and using for displaying | |
2332 | the values and for comparing previous and new values. | |
2333 | ||
2334 | For example, top-level references are always stripped. */ | |
2335 | static struct type * | |
2336 | get_value_type (struct varobj *var) | |
2337 | { | |
2338 | struct type *type; | |
2339 | ||
2340 | if (var->value) | |
2341 | type = value_type (var->value); | |
2342 | else | |
2343 | type = var->type; | |
2344 | ||
2345 | type = check_typedef (type); | |
2346 | ||
2347 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
2348 | type = get_target_type (type); | |
2349 | ||
2350 | type = check_typedef (type); | |
2351 | ||
2352 | return type; | |
2353 | } | |
2354 | ||
8b93c638 | 2355 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
2356 | past typedefs, just like get_type (). |
2357 | ||
2358 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
581e13c1 | 2359 | except within get_target_type and get_type. */ |
8b93c638 | 2360 | static struct type * |
fba45db2 | 2361 | get_target_type (struct type *type) |
8b93c638 JM |
2362 | { |
2363 | if (type != NULL) | |
2364 | { | |
2365 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
2366 | if (type != NULL) |
2367 | type = check_typedef (type); | |
8b93c638 JM |
2368 | } |
2369 | ||
2370 | return type; | |
2371 | } | |
2372 | ||
2373 | /* What is the default display for this variable? We assume that | |
581e13c1 | 2374 | everything is "natural". Any exceptions? */ |
8b93c638 | 2375 | static enum varobj_display_formats |
fba45db2 | 2376 | variable_default_display (struct varobj *var) |
8b93c638 JM |
2377 | { |
2378 | return FORMAT_NATURAL; | |
2379 | } | |
2380 | ||
581e13c1 | 2381 | /* FIXME: The following should be generic for any pointer. */ |
8b93c638 | 2382 | static void |
fba45db2 | 2383 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
2384 | { |
2385 | struct cpstack *s; | |
2386 | ||
2387 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
2388 | s->name = name; | |
2389 | s->next = *pstack; | |
2390 | *pstack = s; | |
2391 | } | |
2392 | ||
581e13c1 | 2393 | /* FIXME: The following should be generic for any pointer. */ |
8b93c638 | 2394 | static char * |
fba45db2 | 2395 | cppop (struct cpstack **pstack) |
8b93c638 JM |
2396 | { |
2397 | struct cpstack *s; | |
2398 | char *v; | |
2399 | ||
2400 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
2401 | return NULL; | |
2402 | ||
2403 | s = *pstack; | |
2404 | v = s->name; | |
2405 | *pstack = (*pstack)->next; | |
b8c9b27d | 2406 | xfree (s); |
8b93c638 JM |
2407 | |
2408 | return v; | |
2409 | } | |
2410 | \f | |
2411 | /* | |
2412 | * Language-dependencies | |
2413 | */ | |
2414 | ||
2415 | /* Common entry points */ | |
2416 | ||
581e13c1 | 2417 | /* Get the language of variable VAR. */ |
8b93c638 | 2418 | static enum varobj_languages |
fba45db2 | 2419 | variable_language (struct varobj *var) |
8b93c638 JM |
2420 | { |
2421 | enum varobj_languages lang; | |
2422 | ||
2423 | switch (var->root->exp->language_defn->la_language) | |
2424 | { | |
2425 | default: | |
2426 | case language_c: | |
2427 | lang = vlang_c; | |
2428 | break; | |
2429 | case language_cplus: | |
2430 | lang = vlang_cplus; | |
2431 | break; | |
2432 | case language_java: | |
2433 | lang = vlang_java; | |
2434 | break; | |
40591b7d JCD |
2435 | case language_ada: |
2436 | lang = vlang_ada; | |
2437 | break; | |
8b93c638 JM |
2438 | } |
2439 | ||
2440 | return lang; | |
2441 | } | |
2442 | ||
2443 | /* Return the number of children for a given variable. | |
2444 | The result of this function is defined by the language | |
581e13c1 | 2445 | implementation. The number of children returned by this function |
8b93c638 | 2446 | is the number of children that the user will see in the variable |
581e13c1 | 2447 | display. */ |
8b93c638 | 2448 | static int |
fba45db2 | 2449 | number_of_children (struct varobj *var) |
8b93c638 | 2450 | { |
82ae4854 | 2451 | return (*var->root->lang->number_of_children) (var); |
8b93c638 JM |
2452 | } |
2453 | ||
3e43a32a | 2454 | /* What is the expression for the root varobj VAR? Returns a malloc'd |
581e13c1 | 2455 | string. */ |
8b93c638 | 2456 | static char * |
fba45db2 | 2457 | name_of_variable (struct varobj *var) |
8b93c638 JM |
2458 | { |
2459 | return (*var->root->lang->name_of_variable) (var); | |
2460 | } | |
2461 | ||
3e43a32a | 2462 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd |
581e13c1 | 2463 | string. */ |
8b93c638 | 2464 | static char * |
fba45db2 | 2465 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
2466 | { |
2467 | return (*var->root->lang->name_of_child) (var, index); | |
2468 | } | |
2469 | ||
a5defcdc VP |
2470 | /* What is the ``struct value *'' of the root variable VAR? |
2471 | For floating variable object, evaluation can get us a value | |
2472 | of different type from what is stored in varobj already. In | |
2473 | that case: | |
2474 | - *type_changed will be set to 1 | |
2475 | - old varobj will be freed, and new one will be | |
2476 | created, with the same name. | |
2477 | - *var_handle will be set to the new varobj | |
2478 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 2479 | static struct value * |
fba45db2 | 2480 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 2481 | { |
73a93a32 JI |
2482 | struct varobj *var; |
2483 | ||
2484 | if (var_handle == NULL) | |
2485 | return NULL; | |
2486 | ||
2487 | var = *var_handle; | |
2488 | ||
2489 | /* This should really be an exception, since this should | |
581e13c1 | 2490 | only get called with a root variable. */ |
73a93a32 | 2491 | |
b2c2bd75 | 2492 | if (!is_root_p (var)) |
73a93a32 JI |
2493 | return NULL; |
2494 | ||
a5defcdc | 2495 | if (var->root->floating) |
73a93a32 JI |
2496 | { |
2497 | struct varobj *tmp_var; | |
2498 | char *old_type, *new_type; | |
6225abfa | 2499 | |
73a93a32 JI |
2500 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
2501 | USE_SELECTED_FRAME); | |
2502 | if (tmp_var == NULL) | |
2503 | { | |
2504 | return NULL; | |
2505 | } | |
6225abfa | 2506 | old_type = varobj_get_type (var); |
73a93a32 | 2507 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 2508 | if (strcmp (old_type, new_type) == 0) |
73a93a32 | 2509 | { |
fcacd99f VP |
2510 | /* The expression presently stored inside var->root->exp |
2511 | remembers the locations of local variables relatively to | |
2512 | the frame where the expression was created (in DWARF location | |
2513 | button, for example). Naturally, those locations are not | |
2514 | correct in other frames, so update the expression. */ | |
2515 | ||
2516 | struct expression *tmp_exp = var->root->exp; | |
a109c7c1 | 2517 | |
fcacd99f VP |
2518 | var->root->exp = tmp_var->root->exp; |
2519 | tmp_var->root->exp = tmp_exp; | |
2520 | ||
73a93a32 JI |
2521 | varobj_delete (tmp_var, NULL, 0); |
2522 | *type_changed = 0; | |
2523 | } | |
2524 | else | |
2525 | { | |
1b36a34b | 2526 | tmp_var->obj_name = xstrdup (var->obj_name); |
0cc7d26f TT |
2527 | tmp_var->from = var->from; |
2528 | tmp_var->to = var->to; | |
a5defcdc VP |
2529 | varobj_delete (var, NULL, 0); |
2530 | ||
73a93a32 JI |
2531 | install_variable (tmp_var); |
2532 | *var_handle = tmp_var; | |
705da579 | 2533 | var = *var_handle; |
73a93a32 JI |
2534 | *type_changed = 1; |
2535 | } | |
74dddad3 MS |
2536 | xfree (old_type); |
2537 | xfree (new_type); | |
73a93a32 JI |
2538 | } |
2539 | else | |
2540 | { | |
2541 | *type_changed = 0; | |
2542 | } | |
2543 | ||
2544 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
2545 | } |
2546 | ||
581e13c1 | 2547 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
30b28db1 | 2548 | static struct value * |
fba45db2 | 2549 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 2550 | { |
30b28db1 | 2551 | struct value *value; |
8b93c638 JM |
2552 | |
2553 | value = (*parent->root->lang->value_of_child) (parent, index); | |
2554 | ||
8b93c638 JM |
2555 | return value; |
2556 | } | |
2557 | ||
581e13c1 | 2558 | /* GDB already has a command called "value_of_variable". Sigh. */ |
8b93c638 | 2559 | static char * |
de051565 | 2560 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2561 | { |
8756216b | 2562 | if (var->root->is_valid) |
0cc7d26f TT |
2563 | { |
2564 | if (var->pretty_printer) | |
2565 | return value_get_print_value (var->value, var->format, var); | |
2566 | return (*var->root->lang->value_of_variable) (var, format); | |
2567 | } | |
8756216b DP |
2568 | else |
2569 | return NULL; | |
8b93c638 JM |
2570 | } |
2571 | ||
85265413 | 2572 | static char * |
b6313243 | 2573 | value_get_print_value (struct value *value, enum varobj_display_formats format, |
d452c4bc | 2574 | struct varobj *var) |
85265413 | 2575 | { |
57e66780 | 2576 | struct ui_file *stb; |
621c8364 | 2577 | struct cleanup *old_chain; |
fbb8f299 | 2578 | gdb_byte *thevalue = NULL; |
79a45b7d | 2579 | struct value_print_options opts; |
be759fcf PM |
2580 | struct type *type = NULL; |
2581 | long len = 0; | |
2582 | char *encoding = NULL; | |
2583 | struct gdbarch *gdbarch = NULL; | |
3a182a69 JK |
2584 | /* Initialize it just to avoid a GCC false warning. */ |
2585 | CORE_ADDR str_addr = 0; | |
09ca9e2e | 2586 | int string_print = 0; |
57e66780 DJ |
2587 | |
2588 | if (value == NULL) | |
2589 | return NULL; | |
2590 | ||
621c8364 TT |
2591 | stb = mem_fileopen (); |
2592 | old_chain = make_cleanup_ui_file_delete (stb); | |
2593 | ||
be759fcf | 2594 | gdbarch = get_type_arch (value_type (value)); |
b6313243 TT |
2595 | #if HAVE_PYTHON |
2596 | { | |
d452c4bc UW |
2597 | PyObject *value_formatter = var->pretty_printer; |
2598 | ||
09ca9e2e TT |
2599 | varobj_ensure_python_env (var); |
2600 | ||
0cc7d26f | 2601 | if (value_formatter) |
b6313243 | 2602 | { |
0cc7d26f TT |
2603 | /* First check to see if we have any children at all. If so, |
2604 | we simply return {...}. */ | |
2605 | if (dynamic_varobj_has_child_method (var)) | |
621c8364 TT |
2606 | { |
2607 | do_cleanups (old_chain); | |
2608 | return xstrdup ("{...}"); | |
2609 | } | |
b6313243 | 2610 | |
0cc7d26f | 2611 | if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst)) |
b6313243 | 2612 | { |
0cc7d26f TT |
2613 | char *hint; |
2614 | struct value *replacement; | |
0cc7d26f TT |
2615 | PyObject *output = NULL; |
2616 | ||
2617 | hint = gdbpy_get_display_hint (value_formatter); | |
2618 | if (hint) | |
2619 | { | |
2620 | if (!strcmp (hint, "string")) | |
2621 | string_print = 1; | |
2622 | xfree (hint); | |
2623 | } | |
b6313243 | 2624 | |
0cc7d26f | 2625 | output = apply_varobj_pretty_printer (value_formatter, |
621c8364 TT |
2626 | &replacement, |
2627 | stb); | |
0cc7d26f TT |
2628 | if (output) |
2629 | { | |
09ca9e2e TT |
2630 | make_cleanup_py_decref (output); |
2631 | ||
be759fcf | 2632 | if (gdbpy_is_lazy_string (output)) |
0cc7d26f | 2633 | { |
09ca9e2e TT |
2634 | gdbpy_extract_lazy_string (output, &str_addr, &type, |
2635 | &len, &encoding); | |
2636 | make_cleanup (free_current_contents, &encoding); | |
be759fcf PM |
2637 | string_print = 1; |
2638 | } | |
2639 | else | |
2640 | { | |
2641 | PyObject *py_str | |
2642 | = python_string_to_target_python_string (output); | |
a109c7c1 | 2643 | |
be759fcf PM |
2644 | if (py_str) |
2645 | { | |
2646 | char *s = PyString_AsString (py_str); | |
a109c7c1 | 2647 | |
be759fcf PM |
2648 | len = PyString_Size (py_str); |
2649 | thevalue = xmemdup (s, len + 1, len + 1); | |
2650 | type = builtin_type (gdbarch)->builtin_char; | |
2651 | Py_DECREF (py_str); | |
09ca9e2e TT |
2652 | |
2653 | if (!string_print) | |
2654 | { | |
2655 | do_cleanups (old_chain); | |
2656 | return thevalue; | |
2657 | } | |
2658 | ||
2659 | make_cleanup (xfree, thevalue); | |
be759fcf | 2660 | } |
8dc78533 JK |
2661 | else |
2662 | gdbpy_print_stack (); | |
0cc7d26f | 2663 | } |
0cc7d26f TT |
2664 | } |
2665 | if (replacement) | |
2666 | value = replacement; | |
b6313243 | 2667 | } |
b6313243 | 2668 | } |
b6313243 TT |
2669 | } |
2670 | #endif | |
2671 | ||
79a45b7d TT |
2672 | get_formatted_print_options (&opts, format_code[(int) format]); |
2673 | opts.deref_ref = 0; | |
b6313243 TT |
2674 | opts.raw = 1; |
2675 | if (thevalue) | |
09ca9e2e TT |
2676 | LA_PRINT_STRING (stb, type, thevalue, len, encoding, 0, &opts); |
2677 | else if (string_print) | |
2678 | val_print_string (type, encoding, str_addr, len, stb, &opts); | |
b6313243 TT |
2679 | else |
2680 | common_val_print (value, stb, 0, &opts, current_language); | |
759ef836 | 2681 | thevalue = ui_file_xstrdup (stb, NULL); |
57e66780 | 2682 | |
85265413 NR |
2683 | do_cleanups (old_chain); |
2684 | return thevalue; | |
2685 | } | |
2686 | ||
340a7723 NR |
2687 | int |
2688 | varobj_editable_p (struct varobj *var) | |
2689 | { | |
2690 | struct type *type; | |
340a7723 NR |
2691 | |
2692 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
2693 | return 0; | |
2694 | ||
2695 | type = get_value_type (var); | |
2696 | ||
2697 | switch (TYPE_CODE (type)) | |
2698 | { | |
2699 | case TYPE_CODE_STRUCT: | |
2700 | case TYPE_CODE_UNION: | |
2701 | case TYPE_CODE_ARRAY: | |
2702 | case TYPE_CODE_FUNC: | |
2703 | case TYPE_CODE_METHOD: | |
2704 | return 0; | |
2705 | break; | |
2706 | ||
2707 | default: | |
2708 | return 1; | |
2709 | break; | |
2710 | } | |
2711 | } | |
2712 | ||
acd65feb VP |
2713 | /* Return non-zero if changes in value of VAR |
2714 | must be detected and reported by -var-update. | |
2715 | Return zero is -var-update should never report | |
2716 | changes of such values. This makes sense for structures | |
2717 | (since the changes in children values will be reported separately), | |
2718 | or for artifical objects (like 'public' pseudo-field in C++). | |
2719 | ||
2720 | Return value of 0 means that gdb need not call value_fetch_lazy | |
2721 | for the value of this variable object. */ | |
8b93c638 | 2722 | static int |
b2c2bd75 | 2723 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
2724 | { |
2725 | int r; | |
2726 | struct type *type; | |
2727 | ||
2728 | if (CPLUS_FAKE_CHILD (var)) | |
2729 | return 0; | |
2730 | ||
6e2a9270 | 2731 | type = get_value_type (var); |
8b93c638 JM |
2732 | |
2733 | switch (TYPE_CODE (type)) | |
2734 | { | |
72330bd6 AC |
2735 | case TYPE_CODE_STRUCT: |
2736 | case TYPE_CODE_UNION: | |
2737 | case TYPE_CODE_ARRAY: | |
2738 | r = 0; | |
2739 | break; | |
8b93c638 | 2740 | |
72330bd6 AC |
2741 | default: |
2742 | r = 1; | |
8b93c638 JM |
2743 | } |
2744 | ||
2745 | return r; | |
2746 | } | |
2747 | ||
5a413362 VP |
2748 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
2749 | selected frame, and not bound to thread/frame. Such variable objects | |
2750 | are created using '@' as frame specifier to -var-create. */ | |
2751 | int | |
2752 | varobj_floating_p (struct varobj *var) | |
2753 | { | |
2754 | return var->root->floating; | |
2755 | } | |
2756 | ||
2024f65a VP |
2757 | /* Given the value and the type of a variable object, |
2758 | adjust the value and type to those necessary | |
2759 | for getting children of the variable object. | |
2760 | This includes dereferencing top-level references | |
2761 | to all types and dereferencing pointers to | |
581e13c1 | 2762 | structures. |
2024f65a | 2763 | |
581e13c1 | 2764 | Both TYPE and *TYPE should be non-null. VALUE |
2024f65a VP |
2765 | can be null if we want to only translate type. |
2766 | *VALUE can be null as well -- if the parent | |
581e13c1 | 2767 | value is not known. |
02142340 VP |
2768 | |
2769 | If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1 | |
b6313243 | 2770 | depending on whether pointer was dereferenced |
02142340 | 2771 | in this function. */ |
2024f65a VP |
2772 | static void |
2773 | adjust_value_for_child_access (struct value **value, | |
02142340 VP |
2774 | struct type **type, |
2775 | int *was_ptr) | |
2024f65a VP |
2776 | { |
2777 | gdb_assert (type && *type); | |
2778 | ||
02142340 VP |
2779 | if (was_ptr) |
2780 | *was_ptr = 0; | |
2781 | ||
2024f65a VP |
2782 | *type = check_typedef (*type); |
2783 | ||
2784 | /* The type of value stored in varobj, that is passed | |
2785 | to us, is already supposed to be | |
2786 | reference-stripped. */ | |
2787 | ||
2788 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
2789 | ||
2790 | /* Pointers to structures are treated just like | |
2791 | structures when accessing children. Don't | |
2792 | dererences pointers to other types. */ | |
2793 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
2794 | { | |
2795 | struct type *target_type = get_target_type (*type); | |
2796 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
2797 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
2798 | { | |
2799 | if (value && *value) | |
3f4178d6 | 2800 | { |
a109c7c1 MS |
2801 | int success = gdb_value_ind (*value, value); |
2802 | ||
3f4178d6 DJ |
2803 | if (!success) |
2804 | *value = NULL; | |
2805 | } | |
2024f65a | 2806 | *type = target_type; |
02142340 VP |
2807 | if (was_ptr) |
2808 | *was_ptr = 1; | |
2024f65a VP |
2809 | } |
2810 | } | |
2811 | ||
2812 | /* The 'get_target_type' function calls check_typedef on | |
2813 | result, so we can immediately check type code. No | |
2814 | need to call check_typedef here. */ | |
2815 | } | |
2816 | ||
8b93c638 JM |
2817 | /* C */ |
2818 | static int | |
fba45db2 | 2819 | c_number_of_children (struct varobj *var) |
8b93c638 | 2820 | { |
2024f65a VP |
2821 | struct type *type = get_value_type (var); |
2822 | int children = 0; | |
8b93c638 | 2823 | struct type *target; |
8b93c638 | 2824 | |
02142340 | 2825 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 | 2826 | target = get_target_type (type); |
8b93c638 JM |
2827 | |
2828 | switch (TYPE_CODE (type)) | |
2829 | { | |
2830 | case TYPE_CODE_ARRAY: | |
2831 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
d78df370 | 2832 | && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
8b93c638 JM |
2833 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
2834 | else | |
74a44383 DJ |
2835 | /* If we don't know how many elements there are, don't display |
2836 | any. */ | |
2837 | children = 0; | |
8b93c638 JM |
2838 | break; |
2839 | ||
2840 | case TYPE_CODE_STRUCT: | |
2841 | case TYPE_CODE_UNION: | |
2842 | children = TYPE_NFIELDS (type); | |
2843 | break; | |
2844 | ||
2845 | case TYPE_CODE_PTR: | |
581e13c1 | 2846 | /* The type here is a pointer to non-struct. Typically, pointers |
2024f65a VP |
2847 | have one child, except for function ptrs, which have no children, |
2848 | and except for void*, as we don't know what to show. | |
2849 | ||
0755e6c1 FN |
2850 | We can show char* so we allow it to be dereferenced. If you decide |
2851 | to test for it, please mind that a little magic is necessary to | |
2852 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
581e13c1 | 2853 | TYPE_NAME == "char". */ |
2024f65a VP |
2854 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
2855 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
2856 | children = 0; | |
2857 | else | |
2858 | children = 1; | |
8b93c638 JM |
2859 | break; |
2860 | ||
2861 | default: | |
581e13c1 | 2862 | /* Other types have no children. */ |
8b93c638 JM |
2863 | break; |
2864 | } | |
2865 | ||
2866 | return children; | |
2867 | } | |
2868 | ||
2869 | static char * | |
fba45db2 | 2870 | c_name_of_variable (struct varobj *parent) |
8b93c638 | 2871 | { |
1b36a34b | 2872 | return xstrdup (parent->name); |
8b93c638 JM |
2873 | } |
2874 | ||
bbec2603 VP |
2875 | /* Return the value of element TYPE_INDEX of a structure |
2876 | value VALUE. VALUE's type should be a structure, | |
581e13c1 | 2877 | or union, or a typedef to struct/union. |
bbec2603 VP |
2878 | |
2879 | Returns NULL if getting the value fails. Never throws. */ | |
2880 | static struct value * | |
2881 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 2882 | { |
bbec2603 VP |
2883 | struct value *result = NULL; |
2884 | volatile struct gdb_exception e; | |
bbec2603 | 2885 | struct type *type = value_type (value); |
a109c7c1 | 2886 | |
bbec2603 VP |
2887 | type = check_typedef (type); |
2888 | ||
2889 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2890 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 2891 | |
bbec2603 VP |
2892 | TRY_CATCH (e, RETURN_MASK_ERROR) |
2893 | { | |
d6a843b5 | 2894 | if (field_is_static (&TYPE_FIELD (type, type_index))) |
bbec2603 VP |
2895 | result = value_static_field (type, type_index); |
2896 | else | |
2897 | result = value_primitive_field (value, 0, type_index, type); | |
2898 | } | |
2899 | if (e.reason < 0) | |
2900 | { | |
2901 | return NULL; | |
2902 | } | |
2903 | else | |
2904 | { | |
2905 | return result; | |
2906 | } | |
2907 | } | |
2908 | ||
2909 | /* Obtain the information about child INDEX of the variable | |
581e13c1 | 2910 | object PARENT. |
bbec2603 VP |
2911 | If CNAME is not null, sets *CNAME to the name of the child relative |
2912 | to the parent. | |
2913 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
2914 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
2915 | ||
2916 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
2917 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
2918 | to NULL. */ | |
2919 | static void | |
2920 | c_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2921 | char **cname, struct value **cvalue, struct type **ctype, |
2922 | char **cfull_expression) | |
bbec2603 VP |
2923 | { |
2924 | struct value *value = parent->value; | |
2024f65a | 2925 | struct type *type = get_value_type (parent); |
02142340 VP |
2926 | char *parent_expression = NULL; |
2927 | int was_ptr; | |
bbec2603 VP |
2928 | |
2929 | if (cname) | |
2930 | *cname = NULL; | |
2931 | if (cvalue) | |
2932 | *cvalue = NULL; | |
2933 | if (ctype) | |
2934 | *ctype = NULL; | |
02142340 VP |
2935 | if (cfull_expression) |
2936 | { | |
2937 | *cfull_expression = NULL; | |
2938 | parent_expression = varobj_get_path_expr (parent); | |
2939 | } | |
2940 | adjust_value_for_child_access (&value, &type, &was_ptr); | |
bbec2603 | 2941 | |
8b93c638 JM |
2942 | switch (TYPE_CODE (type)) |
2943 | { | |
2944 | case TYPE_CODE_ARRAY: | |
bbec2603 | 2945 | if (cname) |
3e43a32a MS |
2946 | *cname |
2947 | = xstrdup (int_string (index | |
2948 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)), | |
2949 | 10, 1, 0, 0)); | |
bbec2603 VP |
2950 | |
2951 | if (cvalue && value) | |
2952 | { | |
2953 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
a109c7c1 | 2954 | |
2497b498 | 2955 | gdb_value_subscript (value, real_index, cvalue); |
bbec2603 VP |
2956 | } |
2957 | ||
2958 | if (ctype) | |
2959 | *ctype = get_target_type (type); | |
2960 | ||
02142340 | 2961 | if (cfull_expression) |
43bbcdc2 PH |
2962 | *cfull_expression = |
2963 | xstrprintf ("(%s)[%s]", parent_expression, | |
2964 | int_string (index | |
2965 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)), | |
2966 | 10, 1, 0, 0)); | |
02142340 VP |
2967 | |
2968 | ||
8b93c638 JM |
2969 | break; |
2970 | ||
2971 | case TYPE_CODE_STRUCT: | |
2972 | case TYPE_CODE_UNION: | |
bbec2603 | 2973 | if (cname) |
1b36a34b | 2974 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); |
bbec2603 VP |
2975 | |
2976 | if (cvalue && value) | |
2977 | { | |
2978 | /* For C, varobj index is the same as type index. */ | |
2979 | *cvalue = value_struct_element_index (value, index); | |
2980 | } | |
2981 | ||
2982 | if (ctype) | |
2983 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2984 | ||
02142340 VP |
2985 | if (cfull_expression) |
2986 | { | |
2987 | char *join = was_ptr ? "->" : "."; | |
a109c7c1 | 2988 | |
02142340 VP |
2989 | *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, join, |
2990 | TYPE_FIELD_NAME (type, index)); | |
2991 | } | |
2992 | ||
8b93c638 JM |
2993 | break; |
2994 | ||
2995 | case TYPE_CODE_PTR: | |
bbec2603 VP |
2996 | if (cname) |
2997 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 2998 | |
bbec2603 | 2999 | if (cvalue && value) |
3f4178d6 DJ |
3000 | { |
3001 | int success = gdb_value_ind (value, cvalue); | |
a109c7c1 | 3002 | |
3f4178d6 DJ |
3003 | if (!success) |
3004 | *cvalue = NULL; | |
3005 | } | |
bbec2603 | 3006 | |
2024f65a VP |
3007 | /* Don't use get_target_type because it calls |
3008 | check_typedef and here, we want to show the true | |
3009 | declared type of the variable. */ | |
bbec2603 | 3010 | if (ctype) |
2024f65a | 3011 | *ctype = TYPE_TARGET_TYPE (type); |
02142340 VP |
3012 | |
3013 | if (cfull_expression) | |
3014 | *cfull_expression = xstrprintf ("*(%s)", parent_expression); | |
bbec2603 | 3015 | |
8b93c638 JM |
3016 | break; |
3017 | ||
3018 | default: | |
581e13c1 | 3019 | /* This should not happen. */ |
bbec2603 VP |
3020 | if (cname) |
3021 | *cname = xstrdup ("???"); | |
02142340 VP |
3022 | if (cfull_expression) |
3023 | *cfull_expression = xstrdup ("???"); | |
581e13c1 | 3024 | /* Don't set value and type, we don't know then. */ |
8b93c638 | 3025 | } |
bbec2603 | 3026 | } |
8b93c638 | 3027 | |
bbec2603 VP |
3028 | static char * |
3029 | c_name_of_child (struct varobj *parent, int index) | |
3030 | { | |
3031 | char *name; | |
a109c7c1 | 3032 | |
02142340 | 3033 | c_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
3034 | return name; |
3035 | } | |
3036 | ||
02142340 VP |
3037 | static char * |
3038 | c_path_expr_of_child (struct varobj *child) | |
3039 | { | |
3040 | c_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
3041 | &child->path_expr); | |
3042 | return child->path_expr; | |
3043 | } | |
3044 | ||
c5b48eac VP |
3045 | /* If frame associated with VAR can be found, switch |
3046 | to it and return 1. Otherwise, return 0. */ | |
3047 | static int | |
3048 | check_scope (struct varobj *var) | |
3049 | { | |
3050 | struct frame_info *fi; | |
3051 | int scope; | |
3052 | ||
3053 | fi = frame_find_by_id (var->root->frame); | |
3054 | scope = fi != NULL; | |
3055 | ||
3056 | if (fi) | |
3057 | { | |
3058 | CORE_ADDR pc = get_frame_pc (fi); | |
a109c7c1 | 3059 | |
c5b48eac VP |
3060 | if (pc < BLOCK_START (var->root->valid_block) || |
3061 | pc >= BLOCK_END (var->root->valid_block)) | |
3062 | scope = 0; | |
3063 | else | |
3064 | select_frame (fi); | |
3065 | } | |
3066 | return scope; | |
3067 | } | |
3068 | ||
30b28db1 | 3069 | static struct value * |
fba45db2 | 3070 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 3071 | { |
5e572bb4 | 3072 | struct value *new_val = NULL; |
73a93a32 | 3073 | struct varobj *var = *var_handle; |
c5b48eac | 3074 | int within_scope = 0; |
6208b47d VP |
3075 | struct cleanup *back_to; |
3076 | ||
581e13c1 | 3077 | /* Only root variables can be updated... */ |
b2c2bd75 | 3078 | if (!is_root_p (var)) |
581e13c1 | 3079 | /* Not a root var. */ |
73a93a32 JI |
3080 | return NULL; |
3081 | ||
4f8d22e3 | 3082 | back_to = make_cleanup_restore_current_thread (); |
72330bd6 | 3083 | |
581e13c1 | 3084 | /* Determine whether the variable is still around. */ |
a5defcdc | 3085 | if (var->root->valid_block == NULL || var->root->floating) |
8b93c638 | 3086 | within_scope = 1; |
c5b48eac VP |
3087 | else if (var->root->thread_id == 0) |
3088 | { | |
3089 | /* The program was single-threaded when the variable object was | |
3090 | created. Technically, it's possible that the program became | |
3091 | multi-threaded since then, but we don't support such | |
3092 | scenario yet. */ | |
3093 | within_scope = check_scope (var); | |
3094 | } | |
8b93c638 JM |
3095 | else |
3096 | { | |
c5b48eac VP |
3097 | ptid_t ptid = thread_id_to_pid (var->root->thread_id); |
3098 | if (in_thread_list (ptid)) | |
d2353924 | 3099 | { |
c5b48eac VP |
3100 | switch_to_thread (ptid); |
3101 | within_scope = check_scope (var); | |
3102 | } | |
8b93c638 | 3103 | } |
72330bd6 | 3104 | |
8b93c638 JM |
3105 | if (within_scope) |
3106 | { | |
73a93a32 | 3107 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
3108 | expression fails we want to just return NULL. */ |
3109 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
3110 | return new_val; |
3111 | } | |
3112 | ||
6208b47d VP |
3113 | do_cleanups (back_to); |
3114 | ||
8b93c638 JM |
3115 | return NULL; |
3116 | } | |
3117 | ||
30b28db1 | 3118 | static struct value * |
fba45db2 | 3119 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 3120 | { |
bbec2603 | 3121 | struct value *value = NULL; |
8b93c638 | 3122 | |
a109c7c1 | 3123 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
3124 | return value; |
3125 | } | |
3126 | ||
3127 | static struct type * | |
fba45db2 | 3128 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 3129 | { |
bbec2603 | 3130 | struct type *type = NULL; |
a109c7c1 | 3131 | |
02142340 | 3132 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
3133 | return type; |
3134 | } | |
3135 | ||
8b93c638 | 3136 | static char * |
de051565 | 3137 | c_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 3138 | { |
14b3d9c9 JB |
3139 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
3140 | it will print out its children instead of "{...}". So we need to | |
3141 | catch that case explicitly. */ | |
3142 | struct type *type = get_type (var); | |
e64d9b3d | 3143 | |
b6313243 TT |
3144 | /* If we have a custom formatter, return whatever string it has |
3145 | produced. */ | |
3146 | if (var->pretty_printer && var->print_value) | |
3147 | return xstrdup (var->print_value); | |
3148 | ||
581e13c1 | 3149 | /* Strip top-level references. */ |
14b3d9c9 JB |
3150 | while (TYPE_CODE (type) == TYPE_CODE_REF) |
3151 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
3152 | ||
3153 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
3154 | { |
3155 | case TYPE_CODE_STRUCT: | |
3156 | case TYPE_CODE_UNION: | |
3157 | return xstrdup ("{...}"); | |
3158 | /* break; */ | |
3159 | ||
3160 | case TYPE_CODE_ARRAY: | |
3161 | { | |
e64d9b3d | 3162 | char *number; |
a109c7c1 | 3163 | |
b435e160 | 3164 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 3165 | return (number); |
8b93c638 JM |
3166 | } |
3167 | /* break; */ | |
3168 | ||
3169 | default: | |
3170 | { | |
575bbeb6 KS |
3171 | if (var->value == NULL) |
3172 | { | |
3173 | /* This can happen if we attempt to get the value of a struct | |
581e13c1 MS |
3174 | member when the parent is an invalid pointer. This is an |
3175 | error condition, so we should tell the caller. */ | |
575bbeb6 KS |
3176 | return NULL; |
3177 | } | |
3178 | else | |
3179 | { | |
25d5ea92 VP |
3180 | if (var->not_fetched && value_lazy (var->value)) |
3181 | /* Frozen variable and no value yet. We don't | |
3182 | implicitly fetch the value. MI response will | |
3183 | use empty string for the value, which is OK. */ | |
3184 | return NULL; | |
3185 | ||
b2c2bd75 | 3186 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 3187 | gdb_assert (!value_lazy (var->value)); |
de051565 MK |
3188 | |
3189 | /* If the specified format is the current one, | |
581e13c1 | 3190 | we can reuse print_value. */ |
de051565 MK |
3191 | if (format == var->format) |
3192 | return xstrdup (var->print_value); | |
3193 | else | |
d452c4bc | 3194 | return value_get_print_value (var->value, format, var); |
85265413 | 3195 | } |
e64d9b3d | 3196 | } |
8b93c638 JM |
3197 | } |
3198 | } | |
3199 | \f | |
3200 | ||
3201 | /* C++ */ | |
3202 | ||
3203 | static int | |
fba45db2 | 3204 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
3205 | { |
3206 | struct type *type; | |
3207 | int children, dont_know; | |
3208 | ||
3209 | dont_know = 1; | |
3210 | children = 0; | |
3211 | ||
3212 | if (!CPLUS_FAKE_CHILD (var)) | |
3213 | { | |
2024f65a | 3214 | type = get_value_type (var); |
02142340 | 3215 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
3216 | |
3217 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 3218 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
3219 | { |
3220 | int kids[3]; | |
3221 | ||
3222 | cplus_class_num_children (type, kids); | |
3223 | if (kids[v_public] != 0) | |
3224 | children++; | |
3225 | if (kids[v_private] != 0) | |
3226 | children++; | |
3227 | if (kids[v_protected] != 0) | |
3228 | children++; | |
3229 | ||
581e13c1 | 3230 | /* Add any baseclasses. */ |
8b93c638 JM |
3231 | children += TYPE_N_BASECLASSES (type); |
3232 | dont_know = 0; | |
3233 | ||
581e13c1 | 3234 | /* FIXME: save children in var. */ |
8b93c638 JM |
3235 | } |
3236 | } | |
3237 | else | |
3238 | { | |
3239 | int kids[3]; | |
3240 | ||
2024f65a | 3241 | type = get_value_type (var->parent); |
02142340 | 3242 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
3243 | |
3244 | cplus_class_num_children (type, kids); | |
6e382aa3 | 3245 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 3246 | children = kids[v_public]; |
6e382aa3 | 3247 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
3248 | children = kids[v_private]; |
3249 | else | |
3250 | children = kids[v_protected]; | |
3251 | dont_know = 0; | |
3252 | } | |
3253 | ||
3254 | if (dont_know) | |
3255 | children = c_number_of_children (var); | |
3256 | ||
3257 | return children; | |
3258 | } | |
3259 | ||
3260 | /* Compute # of public, private, and protected variables in this class. | |
3261 | That means we need to descend into all baseclasses and find out | |
581e13c1 | 3262 | how many are there, too. */ |
8b93c638 | 3263 | static void |
1669605f | 3264 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 | 3265 | { |
d48cc9dd DJ |
3266 | int i, vptr_fieldno; |
3267 | struct type *basetype = NULL; | |
8b93c638 JM |
3268 | |
3269 | children[v_public] = 0; | |
3270 | children[v_private] = 0; | |
3271 | children[v_protected] = 0; | |
3272 | ||
d48cc9dd | 3273 | vptr_fieldno = get_vptr_fieldno (type, &basetype); |
8b93c638 JM |
3274 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) |
3275 | { | |
d48cc9dd DJ |
3276 | /* If we have a virtual table pointer, omit it. Even if virtual |
3277 | table pointers are not specifically marked in the debug info, | |
3278 | they should be artificial. */ | |
3279 | if ((type == basetype && i == vptr_fieldno) | |
3280 | || TYPE_FIELD_ARTIFICIAL (type, i)) | |
8b93c638 JM |
3281 | continue; |
3282 | ||
3283 | if (TYPE_FIELD_PROTECTED (type, i)) | |
3284 | children[v_protected]++; | |
3285 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
3286 | children[v_private]++; | |
3287 | else | |
3288 | children[v_public]++; | |
3289 | } | |
3290 | } | |
3291 | ||
3292 | static char * | |
fba45db2 | 3293 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
3294 | { |
3295 | return c_name_of_variable (parent); | |
3296 | } | |
3297 | ||
2024f65a VP |
3298 | enum accessibility { private_field, protected_field, public_field }; |
3299 | ||
3300 | /* Check if field INDEX of TYPE has the specified accessibility. | |
3301 | Return 0 if so and 1 otherwise. */ | |
3302 | static int | |
3303 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 3304 | { |
2024f65a VP |
3305 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
3306 | return 1; | |
3307 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
3308 | return 1; | |
3309 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
3310 | && !TYPE_FIELD_PROTECTED (type, index)) | |
3311 | return 1; | |
3312 | else | |
3313 | return 0; | |
3314 | } | |
3315 | ||
3316 | static void | |
3317 | cplus_describe_child (struct varobj *parent, int index, | |
02142340 VP |
3318 | char **cname, struct value **cvalue, struct type **ctype, |
3319 | char **cfull_expression) | |
2024f65a | 3320 | { |
2024f65a | 3321 | struct value *value; |
8b93c638 | 3322 | struct type *type; |
02142340 VP |
3323 | int was_ptr; |
3324 | char *parent_expression = NULL; | |
8b93c638 | 3325 | |
2024f65a VP |
3326 | if (cname) |
3327 | *cname = NULL; | |
3328 | if (cvalue) | |
3329 | *cvalue = NULL; | |
3330 | if (ctype) | |
3331 | *ctype = NULL; | |
02142340 VP |
3332 | if (cfull_expression) |
3333 | *cfull_expression = NULL; | |
2024f65a | 3334 | |
8b93c638 JM |
3335 | if (CPLUS_FAKE_CHILD (parent)) |
3336 | { | |
2024f65a VP |
3337 | value = parent->parent->value; |
3338 | type = get_value_type (parent->parent); | |
02142340 VP |
3339 | if (cfull_expression) |
3340 | parent_expression = varobj_get_path_expr (parent->parent); | |
8b93c638 JM |
3341 | } |
3342 | else | |
2024f65a VP |
3343 | { |
3344 | value = parent->value; | |
3345 | type = get_value_type (parent); | |
02142340 VP |
3346 | if (cfull_expression) |
3347 | parent_expression = varobj_get_path_expr (parent); | |
2024f65a | 3348 | } |
8b93c638 | 3349 | |
02142340 | 3350 | adjust_value_for_child_access (&value, &type, &was_ptr); |
2024f65a VP |
3351 | |
3352 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
3f4178d6 | 3353 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
8b93c638 | 3354 | { |
02142340 | 3355 | char *join = was_ptr ? "->" : "."; |
a109c7c1 | 3356 | |
8b93c638 JM |
3357 | if (CPLUS_FAKE_CHILD (parent)) |
3358 | { | |
6e382aa3 JJ |
3359 | /* The fields of the class type are ordered as they |
3360 | appear in the class. We are given an index for a | |
3361 | particular access control type ("public","protected", | |
3362 | or "private"). We must skip over fields that don't | |
3363 | have the access control we are looking for to properly | |
581e13c1 | 3364 | find the indexed field. */ |
6e382aa3 | 3365 | int type_index = TYPE_N_BASECLASSES (type); |
2024f65a | 3366 | enum accessibility acc = public_field; |
d48cc9dd DJ |
3367 | int vptr_fieldno; |
3368 | struct type *basetype = NULL; | |
3369 | ||
3370 | vptr_fieldno = get_vptr_fieldno (type, &basetype); | |
6e382aa3 | 3371 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 3372 | acc = private_field; |
6e382aa3 | 3373 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
3374 | acc = protected_field; |
3375 | ||
3376 | while (index >= 0) | |
6e382aa3 | 3377 | { |
d48cc9dd DJ |
3378 | if ((type == basetype && type_index == vptr_fieldno) |
3379 | || TYPE_FIELD_ARTIFICIAL (type, type_index)) | |
2024f65a VP |
3380 | ; /* ignore vptr */ |
3381 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
3382 | --index; |
3383 | ++type_index; | |
6e382aa3 | 3384 | } |
2024f65a VP |
3385 | --type_index; |
3386 | ||
3387 | if (cname) | |
3388 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
3389 | ||
3390 | if (cvalue && value) | |
3391 | *cvalue = value_struct_element_index (value, type_index); | |
3392 | ||
3393 | if (ctype) | |
3394 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
02142340 VP |
3395 | |
3396 | if (cfull_expression) | |
3e43a32a MS |
3397 | *cfull_expression |
3398 | = xstrprintf ("((%s)%s%s)", parent_expression, | |
3399 | join, | |
3400 | TYPE_FIELD_NAME (type, type_index)); | |
2024f65a VP |
3401 | } |
3402 | else if (index < TYPE_N_BASECLASSES (type)) | |
3403 | { | |
3404 | /* This is a baseclass. */ | |
3405 | if (cname) | |
3406 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
3407 | ||
3408 | if (cvalue && value) | |
0cc7d26f | 3409 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
6e382aa3 | 3410 | |
2024f65a VP |
3411 | if (ctype) |
3412 | { | |
3413 | *ctype = TYPE_FIELD_TYPE (type, index); | |
3414 | } | |
02142340 VP |
3415 | |
3416 | if (cfull_expression) | |
3417 | { | |
3418 | char *ptr = was_ptr ? "*" : ""; | |
a109c7c1 | 3419 | |
581e13c1 | 3420 | /* Cast the parent to the base' type. Note that in gdb, |
02142340 VP |
3421 | expression like |
3422 | (Base1)d | |
3423 | will create an lvalue, for all appearences, so we don't | |
3424 | need to use more fancy: | |
3425 | *(Base1*)(&d) | |
3426 | construct. */ | |
3427 | *cfull_expression = xstrprintf ("(%s(%s%s) %s)", | |
3428 | ptr, | |
3429 | TYPE_FIELD_NAME (type, index), | |
3430 | ptr, | |
3431 | parent_expression); | |
3432 | } | |
8b93c638 | 3433 | } |
8b93c638 JM |
3434 | else |
3435 | { | |
348144ba | 3436 | char *access = NULL; |
6e382aa3 | 3437 | int children[3]; |
a109c7c1 | 3438 | |
2024f65a | 3439 | cplus_class_num_children (type, children); |
6e382aa3 | 3440 | |
8b93c638 | 3441 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
3442 | only be "public", "private", or "protected" |
3443 | ||
3444 | The special "fake" children are always output by varobj in | |
581e13c1 | 3445 | this order. So if INDEX == 2, it MUST be "protected". */ |
8b93c638 JM |
3446 | index -= TYPE_N_BASECLASSES (type); |
3447 | switch (index) | |
3448 | { | |
3449 | case 0: | |
6e382aa3 | 3450 | if (children[v_public] > 0) |
2024f65a | 3451 | access = "public"; |
6e382aa3 | 3452 | else if (children[v_private] > 0) |
2024f65a | 3453 | access = "private"; |
6e382aa3 | 3454 | else |
2024f65a | 3455 | access = "protected"; |
6e382aa3 | 3456 | break; |
8b93c638 | 3457 | case 1: |
6e382aa3 | 3458 | if (children[v_public] > 0) |
8b93c638 | 3459 | { |
6e382aa3 | 3460 | if (children[v_private] > 0) |
2024f65a | 3461 | access = "private"; |
6e382aa3 | 3462 | else |
2024f65a | 3463 | access = "protected"; |
8b93c638 | 3464 | } |
6e382aa3 | 3465 | else if (children[v_private] > 0) |
2024f65a | 3466 | access = "protected"; |
6e382aa3 | 3467 | break; |
8b93c638 | 3468 | case 2: |
581e13c1 | 3469 | /* Must be protected. */ |
2024f65a | 3470 | access = "protected"; |
6e382aa3 | 3471 | break; |
8b93c638 | 3472 | default: |
581e13c1 | 3473 | /* error! */ |
8b93c638 JM |
3474 | break; |
3475 | } | |
348144ba MS |
3476 | |
3477 | gdb_assert (access); | |
2024f65a VP |
3478 | if (cname) |
3479 | *cname = xstrdup (access); | |
8b93c638 | 3480 | |
02142340 | 3481 | /* Value and type and full expression are null here. */ |
2024f65a | 3482 | } |
8b93c638 | 3483 | } |
8b93c638 JM |
3484 | else |
3485 | { | |
02142340 | 3486 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
2024f65a VP |
3487 | } |
3488 | } | |
8b93c638 | 3489 | |
2024f65a VP |
3490 | static char * |
3491 | cplus_name_of_child (struct varobj *parent, int index) | |
3492 | { | |
3493 | char *name = NULL; | |
a109c7c1 | 3494 | |
02142340 | 3495 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
3496 | return name; |
3497 | } | |
3498 | ||
02142340 VP |
3499 | static char * |
3500 | cplus_path_expr_of_child (struct varobj *child) | |
3501 | { | |
3502 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
3503 | &child->path_expr); | |
3504 | return child->path_expr; | |
3505 | } | |
3506 | ||
30b28db1 | 3507 | static struct value * |
fba45db2 | 3508 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 3509 | { |
73a93a32 | 3510 | return c_value_of_root (var_handle); |
8b93c638 JM |
3511 | } |
3512 | ||
30b28db1 | 3513 | static struct value * |
fba45db2 | 3514 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 3515 | { |
2024f65a | 3516 | struct value *value = NULL; |
a109c7c1 | 3517 | |
02142340 | 3518 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
3519 | return value; |
3520 | } | |
3521 | ||
3522 | static struct type * | |
fba45db2 | 3523 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 3524 | { |
2024f65a | 3525 | struct type *type = NULL; |
a109c7c1 | 3526 | |
02142340 | 3527 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
3528 | return type; |
3529 | } | |
3530 | ||
8b93c638 | 3531 | static char * |
a109c7c1 MS |
3532 | cplus_value_of_variable (struct varobj *var, |
3533 | enum varobj_display_formats format) | |
8b93c638 JM |
3534 | { |
3535 | ||
3536 | /* If we have one of our special types, don't print out | |
581e13c1 | 3537 | any value. */ |
8b93c638 JM |
3538 | if (CPLUS_FAKE_CHILD (var)) |
3539 | return xstrdup (""); | |
3540 | ||
de051565 | 3541 | return c_value_of_variable (var, format); |
8b93c638 JM |
3542 | } |
3543 | \f | |
3544 | /* Java */ | |
3545 | ||
3546 | static int | |
fba45db2 | 3547 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
3548 | { |
3549 | return cplus_number_of_children (var); | |
3550 | } | |
3551 | ||
3552 | static char * | |
fba45db2 | 3553 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
3554 | { |
3555 | char *p, *name; | |
3556 | ||
3557 | name = cplus_name_of_variable (parent); | |
3558 | /* If the name has "-" in it, it is because we | |
581e13c1 | 3559 | needed to escape periods in the name... */ |
8b93c638 JM |
3560 | p = name; |
3561 | ||
3562 | while (*p != '\000') | |
3563 | { | |
3564 | if (*p == '-') | |
3565 | *p = '.'; | |
3566 | p++; | |
3567 | } | |
3568 | ||
3569 | return name; | |
3570 | } | |
3571 | ||
3572 | static char * | |
fba45db2 | 3573 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3574 | { |
3575 | char *name, *p; | |
3576 | ||
3577 | name = cplus_name_of_child (parent, index); | |
581e13c1 | 3578 | /* Escape any periods in the name... */ |
8b93c638 JM |
3579 | p = name; |
3580 | ||
3581 | while (*p != '\000') | |
3582 | { | |
3583 | if (*p == '.') | |
3584 | *p = '-'; | |
3585 | p++; | |
3586 | } | |
3587 | ||
3588 | return name; | |
3589 | } | |
3590 | ||
02142340 VP |
3591 | static char * |
3592 | java_path_expr_of_child (struct varobj *child) | |
3593 | { | |
3594 | return NULL; | |
3595 | } | |
3596 | ||
30b28db1 | 3597 | static struct value * |
fba45db2 | 3598 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 3599 | { |
73a93a32 | 3600 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
3601 | } |
3602 | ||
30b28db1 | 3603 | static struct value * |
fba45db2 | 3604 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3605 | { |
3606 | return cplus_value_of_child (parent, index); | |
3607 | } | |
3608 | ||
3609 | static struct type * | |
fba45db2 | 3610 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3611 | { |
3612 | return cplus_type_of_child (parent, index); | |
3613 | } | |
3614 | ||
8b93c638 | 3615 | static char * |
de051565 | 3616 | java_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 3617 | { |
de051565 | 3618 | return cplus_value_of_variable (var, format); |
8b93c638 | 3619 | } |
54333c3b | 3620 | |
40591b7d JCD |
3621 | /* Ada specific callbacks for VAROBJs. */ |
3622 | ||
3623 | static int | |
3624 | ada_number_of_children (struct varobj *var) | |
3625 | { | |
3626 | return c_number_of_children (var); | |
3627 | } | |
3628 | ||
3629 | static char * | |
3630 | ada_name_of_variable (struct varobj *parent) | |
3631 | { | |
3632 | return c_name_of_variable (parent); | |
3633 | } | |
3634 | ||
3635 | static char * | |
3636 | ada_name_of_child (struct varobj *parent, int index) | |
3637 | { | |
3638 | return c_name_of_child (parent, index); | |
3639 | } | |
3640 | ||
3641 | static char* | |
3642 | ada_path_expr_of_child (struct varobj *child) | |
3643 | { | |
3644 | return c_path_expr_of_child (child); | |
3645 | } | |
3646 | ||
3647 | static struct value * | |
3648 | ada_value_of_root (struct varobj **var_handle) | |
3649 | { | |
3650 | return c_value_of_root (var_handle); | |
3651 | } | |
3652 | ||
3653 | static struct value * | |
3654 | ada_value_of_child (struct varobj *parent, int index) | |
3655 | { | |
3656 | return c_value_of_child (parent, index); | |
3657 | } | |
3658 | ||
3659 | static struct type * | |
3660 | ada_type_of_child (struct varobj *parent, int index) | |
3661 | { | |
3662 | return c_type_of_child (parent, index); | |
3663 | } | |
3664 | ||
3665 | static char * | |
3666 | ada_value_of_variable (struct varobj *var, enum varobj_display_formats format) | |
3667 | { | |
3668 | return c_value_of_variable (var, format); | |
3669 | } | |
3670 | ||
54333c3b JK |
3671 | /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them |
3672 | with an arbitrary caller supplied DATA pointer. */ | |
3673 | ||
3674 | void | |
3675 | all_root_varobjs (void (*func) (struct varobj *var, void *data), void *data) | |
3676 | { | |
3677 | struct varobj_root *var_root, *var_root_next; | |
3678 | ||
3679 | /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */ | |
3680 | ||
3681 | for (var_root = rootlist; var_root != NULL; var_root = var_root_next) | |
3682 | { | |
3683 | var_root_next = var_root->next; | |
3684 | ||
3685 | (*func) (var_root->rootvar, data); | |
3686 | } | |
3687 | } | |
8b93c638 JM |
3688 | \f |
3689 | extern void _initialize_varobj (void); | |
3690 | void | |
3691 | _initialize_varobj (void) | |
3692 | { | |
3693 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
3694 | ||
3695 | varobj_table = xmalloc (sizeof_table); | |
3696 | memset (varobj_table, 0, sizeof_table); | |
3697 | ||
85c07804 | 3698 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
3e43a32a MS |
3699 | &varobjdebug, |
3700 | _("Set varobj debugging."), | |
3701 | _("Show varobj debugging."), | |
3702 | _("When non-zero, varobj debugging is enabled."), | |
3703 | NULL, show_varobjdebug, | |
85c07804 | 3704 | &setlist, &showlist); |
8b93c638 | 3705 | } |
8756216b | 3706 | |
54333c3b JK |
3707 | /* Invalidate varobj VAR if it is tied to locals and re-create it if it is |
3708 | defined on globals. It is a helper for varobj_invalidate. */ | |
2dbd25e5 | 3709 | |
54333c3b JK |
3710 | static void |
3711 | varobj_invalidate_iter (struct varobj *var, void *unused) | |
8756216b | 3712 | { |
54333c3b JK |
3713 | /* Floating varobjs are reparsed on each stop, so we don't care if the |
3714 | presently parsed expression refers to something that's gone. */ | |
3715 | if (var->root->floating) | |
3716 | return; | |
8756216b | 3717 | |
54333c3b JK |
3718 | /* global var must be re-evaluated. */ |
3719 | if (var->root->valid_block == NULL) | |
2dbd25e5 | 3720 | { |
54333c3b | 3721 | struct varobj *tmp_var; |
2dbd25e5 | 3722 | |
54333c3b JK |
3723 | /* Try to create a varobj with same expression. If we succeed |
3724 | replace the old varobj, otherwise invalidate it. */ | |
3725 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
3726 | USE_CURRENT_FRAME); | |
3727 | if (tmp_var != NULL) | |
3728 | { | |
3729 | tmp_var->obj_name = xstrdup (var->obj_name); | |
3730 | varobj_delete (var, NULL, 0); | |
3731 | install_variable (tmp_var); | |
2dbd25e5 | 3732 | } |
54333c3b JK |
3733 | else |
3734 | var->root->is_valid = 0; | |
2dbd25e5 | 3735 | } |
54333c3b JK |
3736 | else /* locals must be invalidated. */ |
3737 | var->root->is_valid = 0; | |
3738 | } | |
3739 | ||
3740 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
3741 | are defined on globals. | |
3742 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
3743 | ||
3744 | void | |
3745 | varobj_invalidate (void) | |
3746 | { | |
3747 | all_root_varobjs (varobj_invalidate_iter, NULL); | |
8756216b | 3748 | } |