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