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