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