Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
0fb0cc75 JB |
3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, |
4 | 2009 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" |
8b93c638 JM |
32 | |
33 | #include "varobj.h" | |
28335dcc | 34 | #include "vec.h" |
6208b47d VP |
35 | #include "gdbthread.h" |
36 | #include "inferior.h" | |
8b93c638 | 37 | |
b6313243 TT |
38 | #if HAVE_PYTHON |
39 | #include "python/python.h" | |
40 | #include "python/python-internal.h" | |
41 | #else | |
42 | typedef int PyObject; | |
43 | #endif | |
44 | ||
8b93c638 JM |
45 | /* Non-zero if we want to see trace of varobj level stuff. */ |
46 | ||
47 | int varobjdebug = 0; | |
920d2a44 AC |
48 | static void |
49 | show_varobjdebug (struct ui_file *file, int from_tty, | |
50 | struct cmd_list_element *c, const char *value) | |
51 | { | |
52 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
53 | } | |
8b93c638 JM |
54 | |
55 | /* String representations of gdb's format codes */ | |
56 | char *varobj_format_string[] = | |
72330bd6 | 57 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
58 | |
59 | /* String representations of gdb's known languages */ | |
72330bd6 | 60 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
61 | |
62 | /* Data structures */ | |
63 | ||
64 | /* Every root variable has one of these structures saved in its | |
65 | varobj. Members which must be free'd are noted. */ | |
66 | struct varobj_root | |
72330bd6 | 67 | { |
8b93c638 | 68 | |
72330bd6 AC |
69 | /* Alloc'd expression for this parent. */ |
70 | struct expression *exp; | |
8b93c638 | 71 | |
72330bd6 AC |
72 | /* Block for which this expression is valid */ |
73 | struct block *valid_block; | |
8b93c638 | 74 | |
44a67aa7 VP |
75 | /* The frame for this expression. This field is set iff valid_block is |
76 | not NULL. */ | |
e64d9b3d | 77 | struct frame_id frame; |
8b93c638 | 78 | |
c5b48eac VP |
79 | /* The thread ID that this varobj_root belong to. This field |
80 | is only valid if valid_block is not NULL. | |
81 | When not 0, indicates which thread 'frame' belongs to. | |
82 | When 0, indicates that the thread list was empty when the varobj_root | |
83 | was created. */ | |
84 | int thread_id; | |
85 | ||
a5defcdc VP |
86 | /* If 1, the -var-update always recomputes the value in the |
87 | current thread and frame. Otherwise, variable object is | |
88 | always updated in the specific scope/thread/frame */ | |
89 | int floating; | |
73a93a32 | 90 | |
8756216b DP |
91 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
92 | to symbols that do not exist anymore. */ | |
93 | int is_valid; | |
94 | ||
72330bd6 AC |
95 | /* Language info for this variable and its children */ |
96 | struct language_specific *lang; | |
8b93c638 | 97 | |
72330bd6 AC |
98 | /* The varobj for this root node. */ |
99 | struct varobj *rootvar; | |
8b93c638 | 100 | |
72330bd6 AC |
101 | /* Next root variable */ |
102 | struct varobj_root *next; | |
103 | }; | |
8b93c638 JM |
104 | |
105 | /* Every variable in the system has a structure of this type defined | |
106 | for it. This structure holds all information necessary to manipulate | |
107 | a particular object variable. Members which must be freed are noted. */ | |
108 | struct varobj | |
72330bd6 | 109 | { |
8b93c638 | 110 | |
72330bd6 AC |
111 | /* Alloc'd name of the variable for this object.. If this variable is a |
112 | child, then this name will be the child's source name. | |
113 | (bar, not foo.bar) */ | |
114 | /* NOTE: This is the "expression" */ | |
115 | char *name; | |
8b93c638 | 116 | |
02142340 VP |
117 | /* Alloc'd expression for this child. Can be used to create a |
118 | root variable corresponding to this child. */ | |
119 | char *path_expr; | |
120 | ||
72330bd6 AC |
121 | /* The alloc'd name for this variable's object. This is here for |
122 | convenience when constructing this object's children. */ | |
123 | char *obj_name; | |
8b93c638 | 124 | |
72330bd6 AC |
125 | /* Index of this variable in its parent or -1 */ |
126 | int index; | |
8b93c638 | 127 | |
202ddcaa VP |
128 | /* The type of this variable. This can be NULL |
129 | for artifial variable objects -- currently, the "accessibility" | |
130 | variable objects in C++. */ | |
72330bd6 | 131 | struct type *type; |
8b93c638 | 132 | |
b20d8971 VP |
133 | /* The value of this expression or subexpression. A NULL value |
134 | indicates there was an error getting this value. | |
b2c2bd75 VP |
135 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
136 | the value is either NULL, or not lazy. */ | |
30b28db1 | 137 | struct value *value; |
8b93c638 | 138 | |
72330bd6 AC |
139 | /* The number of (immediate) children this variable has */ |
140 | int num_children; | |
8b93c638 | 141 | |
72330bd6 AC |
142 | /* If this object is a child, this points to its immediate parent. */ |
143 | struct varobj *parent; | |
8b93c638 | 144 | |
28335dcc VP |
145 | /* Children of this object. */ |
146 | VEC (varobj_p) *children; | |
8b93c638 | 147 | |
b6313243 TT |
148 | /* Whether the children of this varobj were requested. This field is |
149 | used to decide if dynamic varobj should recompute their children. | |
150 | In the event that the frontend never asked for the children, we | |
151 | can avoid that. */ | |
152 | int children_requested; | |
153 | ||
72330bd6 AC |
154 | /* Description of the root variable. Points to root variable for children. */ |
155 | struct varobj_root *root; | |
8b93c638 | 156 | |
72330bd6 AC |
157 | /* The format of the output for this object */ |
158 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
159 | |
160 | /* Was this variable updated via a varobj_set_value operation */ | |
161 | int updated; | |
85265413 NR |
162 | |
163 | /* Last print value. */ | |
164 | char *print_value; | |
25d5ea92 VP |
165 | |
166 | /* Is this variable frozen. Frozen variables are never implicitly | |
167 | updated by -var-update * | |
168 | or -var-update <direct-or-indirect-parent>. */ | |
169 | int frozen; | |
170 | ||
171 | /* Is the value of this variable intentionally not fetched? It is | |
172 | not fetched if either the variable is frozen, or any parents is | |
173 | frozen. */ | |
174 | int not_fetched; | |
b6313243 TT |
175 | |
176 | /* The pretty-printer that has been constructed. If NULL, then a | |
177 | new printer object is needed, and one will be constructed. */ | |
178 | PyObject *pretty_printer; | |
72330bd6 | 179 | }; |
8b93c638 | 180 | |
8b93c638 | 181 | struct cpstack |
72330bd6 AC |
182 | { |
183 | char *name; | |
184 | struct cpstack *next; | |
185 | }; | |
8b93c638 JM |
186 | |
187 | /* A list of varobjs */ | |
188 | ||
189 | struct vlist | |
72330bd6 AC |
190 | { |
191 | struct varobj *var; | |
192 | struct vlist *next; | |
193 | }; | |
8b93c638 JM |
194 | |
195 | /* Private function prototypes */ | |
196 | ||
197 | /* Helper functions for the above subcommands. */ | |
198 | ||
a14ed312 | 199 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 200 | |
a14ed312 KB |
201 | static void delete_variable_1 (struct cpstack **, int *, |
202 | struct varobj *, int, int); | |
8b93c638 | 203 | |
a14ed312 | 204 | static int install_variable (struct varobj *); |
8b93c638 | 205 | |
a14ed312 | 206 | static void uninstall_variable (struct varobj *); |
8b93c638 | 207 | |
a14ed312 | 208 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 209 | |
b6313243 TT |
210 | static struct varobj * |
211 | create_child_with_value (struct varobj *parent, int index, const char *name, | |
212 | struct value *value); | |
213 | ||
8b93c638 JM |
214 | /* Utility routines */ |
215 | ||
a14ed312 | 216 | static struct varobj *new_variable (void); |
8b93c638 | 217 | |
a14ed312 | 218 | static struct varobj *new_root_variable (void); |
8b93c638 | 219 | |
a14ed312 | 220 | static void free_variable (struct varobj *var); |
8b93c638 | 221 | |
74b7792f AC |
222 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
223 | ||
a14ed312 | 224 | static struct type *get_type (struct varobj *var); |
8b93c638 | 225 | |
6e2a9270 VP |
226 | static struct type *get_value_type (struct varobj *var); |
227 | ||
a14ed312 | 228 | static struct type *get_target_type (struct type *); |
8b93c638 | 229 | |
a14ed312 | 230 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 231 | |
a14ed312 | 232 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 233 | |
a14ed312 | 234 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 235 | |
acd65feb VP |
236 | static int install_new_value (struct varobj *var, struct value *value, |
237 | int initial); | |
238 | ||
b6313243 TT |
239 | static void install_default_visualizer (struct varobj *var); |
240 | ||
8b93c638 JM |
241 | /* Language-specific routines. */ |
242 | ||
a14ed312 | 243 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 244 | |
a14ed312 | 245 | static int number_of_children (struct varobj *); |
8b93c638 | 246 | |
a14ed312 | 247 | static char *name_of_variable (struct varobj *); |
8b93c638 | 248 | |
a14ed312 | 249 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 250 | |
30b28db1 | 251 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 252 | |
30b28db1 | 253 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 254 | |
de051565 MK |
255 | static char *my_value_of_variable (struct varobj *var, |
256 | enum varobj_display_formats format); | |
8b93c638 | 257 | |
85265413 | 258 | static char *value_get_print_value (struct value *value, |
b6313243 | 259 | enum varobj_display_formats format, |
d452c4bc | 260 | struct varobj *var); |
85265413 | 261 | |
b2c2bd75 VP |
262 | static int varobj_value_is_changeable_p (struct varobj *var); |
263 | ||
264 | static int is_root_p (struct varobj *var); | |
8b93c638 | 265 | |
b6313243 TT |
266 | static struct varobj * |
267 | varobj_add_child (struct varobj *var, const char *name, struct value *value); | |
268 | ||
8b93c638 JM |
269 | /* C implementation */ |
270 | ||
a14ed312 | 271 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 272 | |
a14ed312 | 273 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 274 | |
a14ed312 | 275 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 276 | |
02142340 VP |
277 | static char *c_path_expr_of_child (struct varobj *child); |
278 | ||
30b28db1 | 279 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 280 | |
30b28db1 | 281 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 282 | |
a14ed312 | 283 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 284 | |
de051565 MK |
285 | static char *c_value_of_variable (struct varobj *var, |
286 | enum varobj_display_formats format); | |
8b93c638 JM |
287 | |
288 | /* C++ implementation */ | |
289 | ||
a14ed312 | 290 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 291 | |
a14ed312 | 292 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 293 | |
a14ed312 | 294 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 295 | |
a14ed312 | 296 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 297 | |
02142340 VP |
298 | static char *cplus_path_expr_of_child (struct varobj *child); |
299 | ||
30b28db1 | 300 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 301 | |
30b28db1 | 302 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 303 | |
a14ed312 | 304 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 305 | |
de051565 MK |
306 | static char *cplus_value_of_variable (struct varobj *var, |
307 | enum varobj_display_formats format); | |
8b93c638 JM |
308 | |
309 | /* Java implementation */ | |
310 | ||
a14ed312 | 311 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 312 | |
a14ed312 | 313 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 314 | |
a14ed312 | 315 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 316 | |
02142340 VP |
317 | static char *java_path_expr_of_child (struct varobj *child); |
318 | ||
30b28db1 | 319 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 320 | |
30b28db1 | 321 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 322 | |
a14ed312 | 323 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 324 | |
de051565 MK |
325 | static char *java_value_of_variable (struct varobj *var, |
326 | enum varobj_display_formats format); | |
8b93c638 JM |
327 | |
328 | /* The language specific vector */ | |
329 | ||
330 | struct language_specific | |
72330bd6 | 331 | { |
8b93c638 | 332 | |
72330bd6 AC |
333 | /* The language of this variable */ |
334 | enum varobj_languages language; | |
8b93c638 | 335 | |
72330bd6 AC |
336 | /* The number of children of PARENT. */ |
337 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 338 | |
72330bd6 AC |
339 | /* The name (expression) of a root varobj. */ |
340 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 341 | |
72330bd6 AC |
342 | /* The name of the INDEX'th child of PARENT. */ |
343 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 344 | |
02142340 VP |
345 | /* Returns the rooted expression of CHILD, which is a variable |
346 | obtain that has some parent. */ | |
347 | char *(*path_expr_of_child) (struct varobj * child); | |
348 | ||
30b28db1 AC |
349 | /* The ``struct value *'' of the root variable ROOT. */ |
350 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 351 | |
30b28db1 AC |
352 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
353 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 354 | |
72330bd6 AC |
355 | /* The type of the INDEX'th child of PARENT. */ |
356 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 357 | |
72330bd6 | 358 | /* The current value of VAR. */ |
de051565 MK |
359 | char *(*value_of_variable) (struct varobj * var, |
360 | enum varobj_display_formats format); | |
72330bd6 | 361 | }; |
8b93c638 JM |
362 | |
363 | /* Array of known source language routines. */ | |
d5d6fca5 | 364 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
365 | /* Unknown (try treating as C */ |
366 | { | |
72330bd6 AC |
367 | vlang_unknown, |
368 | c_number_of_children, | |
369 | c_name_of_variable, | |
370 | c_name_of_child, | |
02142340 | 371 | c_path_expr_of_child, |
72330bd6 AC |
372 | c_value_of_root, |
373 | c_value_of_child, | |
374 | c_type_of_child, | |
72330bd6 | 375 | c_value_of_variable} |
8b93c638 JM |
376 | , |
377 | /* C */ | |
378 | { | |
72330bd6 AC |
379 | vlang_c, |
380 | c_number_of_children, | |
381 | c_name_of_variable, | |
382 | c_name_of_child, | |
02142340 | 383 | c_path_expr_of_child, |
72330bd6 AC |
384 | c_value_of_root, |
385 | c_value_of_child, | |
386 | c_type_of_child, | |
72330bd6 | 387 | c_value_of_variable} |
8b93c638 JM |
388 | , |
389 | /* C++ */ | |
390 | { | |
72330bd6 AC |
391 | vlang_cplus, |
392 | cplus_number_of_children, | |
393 | cplus_name_of_variable, | |
394 | cplus_name_of_child, | |
02142340 | 395 | cplus_path_expr_of_child, |
72330bd6 AC |
396 | cplus_value_of_root, |
397 | cplus_value_of_child, | |
398 | cplus_type_of_child, | |
72330bd6 | 399 | cplus_value_of_variable} |
8b93c638 JM |
400 | , |
401 | /* Java */ | |
402 | { | |
72330bd6 AC |
403 | vlang_java, |
404 | java_number_of_children, | |
405 | java_name_of_variable, | |
406 | java_name_of_child, | |
02142340 | 407 | java_path_expr_of_child, |
72330bd6 AC |
408 | java_value_of_root, |
409 | java_value_of_child, | |
410 | java_type_of_child, | |
72330bd6 | 411 | java_value_of_variable} |
8b93c638 JM |
412 | }; |
413 | ||
414 | /* A little convenience enum for dealing with C++/Java */ | |
415 | enum vsections | |
72330bd6 AC |
416 | { |
417 | v_public = 0, v_private, v_protected | |
418 | }; | |
8b93c638 JM |
419 | |
420 | /* Private data */ | |
421 | ||
422 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 423 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
424 | |
425 | /* Header of the list of root variable objects */ | |
426 | static struct varobj_root *rootlist; | |
8b93c638 JM |
427 | |
428 | /* Prime number indicating the number of buckets in the hash table */ | |
429 | /* A prime large enough to avoid too many colisions */ | |
430 | #define VAROBJ_TABLE_SIZE 227 | |
431 | ||
432 | /* Pointer to the varobj hash table (built at run time) */ | |
433 | static struct vlist **varobj_table; | |
434 | ||
8b93c638 JM |
435 | /* Is the variable X one of our "fake" children? */ |
436 | #define CPLUS_FAKE_CHILD(x) \ | |
437 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
438 | \f | |
439 | ||
440 | /* API Implementation */ | |
b2c2bd75 VP |
441 | static int |
442 | is_root_p (struct varobj *var) | |
443 | { | |
444 | return (var->root->rootvar == var); | |
445 | } | |
8b93c638 | 446 | |
d452c4bc UW |
447 | #ifdef HAVE_PYTHON |
448 | /* Helper function to install a Python environment suitable for | |
449 | use during operations on VAR. */ | |
450 | struct cleanup * | |
451 | varobj_ensure_python_env (struct varobj *var) | |
452 | { | |
453 | return ensure_python_env (var->root->exp->gdbarch, | |
454 | var->root->exp->language_defn); | |
455 | } | |
456 | #endif | |
457 | ||
8b93c638 JM |
458 | /* Creates a varobj (not its children) */ |
459 | ||
7d8547c9 AC |
460 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
461 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
462 | ||
463 | static struct frame_info * | |
464 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
465 | { | |
466 | struct frame_info *frame = NULL; | |
467 | ||
468 | if (frame_addr == (CORE_ADDR) 0) | |
469 | return NULL; | |
470 | ||
9d49bdc2 PA |
471 | for (frame = get_current_frame (); |
472 | frame != NULL; | |
473 | frame = get_prev_frame (frame)) | |
7d8547c9 | 474 | { |
1fac167a UW |
475 | /* The CORE_ADDR we get as argument was parsed from a string GDB |
476 | output as $fp. This output got truncated to gdbarch_addr_bit. | |
477 | Truncate the frame base address in the same manner before | |
478 | comparing it against our argument. */ | |
479 | CORE_ADDR frame_base = get_frame_base_address (frame); | |
480 | int addr_bit = gdbarch_addr_bit (get_frame_arch (frame)); | |
481 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) | |
482 | frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
483 | ||
484 | if (frame_base == frame_addr) | |
7d8547c9 AC |
485 | return frame; |
486 | } | |
9d49bdc2 PA |
487 | |
488 | return NULL; | |
7d8547c9 AC |
489 | } |
490 | ||
8b93c638 JM |
491 | struct varobj * |
492 | varobj_create (char *objname, | |
72330bd6 | 493 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
494 | { |
495 | struct varobj *var; | |
2c67cb8b AC |
496 | struct frame_info *fi; |
497 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
498 | struct block *block; |
499 | struct cleanup *old_chain; | |
500 | ||
501 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
502 | var = new_root_variable (); | |
74b7792f | 503 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
504 | |
505 | if (expression != NULL) | |
506 | { | |
507 | char *p; | |
508 | enum varobj_languages lang; | |
e55dccf0 | 509 | struct value *value = NULL; |
8b93c638 | 510 | |
9d49bdc2 PA |
511 | /* Parse and evaluate the expression, filling in as much of the |
512 | variable's data as possible. */ | |
513 | ||
514 | if (has_stack_frames ()) | |
515 | { | |
516 | /* Allow creator to specify context of variable */ | |
517 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) | |
518 | fi = get_selected_frame (NULL); | |
519 | else | |
520 | /* FIXME: cagney/2002-11-23: This code should be doing a | |
521 | lookup using the frame ID and not just the frame's | |
522 | ``address''. This, of course, means an interface | |
523 | change. However, with out that interface change ISAs, | |
524 | such as the ia64 with its two stacks, won't work. | |
525 | Similar goes for the case where there is a frameless | |
526 | function. */ | |
527 | fi = find_frame_addr_in_frame_chain (frame); | |
528 | } | |
8b93c638 | 529 | else |
9d49bdc2 | 530 | fi = NULL; |
8b93c638 | 531 | |
73a93a32 JI |
532 | /* frame = -2 means always use selected frame */ |
533 | if (type == USE_SELECTED_FRAME) | |
a5defcdc | 534 | var->root->floating = 1; |
73a93a32 | 535 | |
8b93c638 JM |
536 | block = NULL; |
537 | if (fi != NULL) | |
ae767bfb | 538 | block = get_frame_block (fi, 0); |
8b93c638 JM |
539 | |
540 | p = expression; | |
541 | innermost_block = NULL; | |
73a93a32 JI |
542 | /* Wrap the call to parse expression, so we can |
543 | return a sensible error. */ | |
544 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
545 | { | |
546 | return NULL; | |
547 | } | |
8b93c638 JM |
548 | |
549 | /* Don't allow variables to be created for types. */ | |
550 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
551 | { | |
552 | do_cleanups (old_chain); | |
bc8332bb AC |
553 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
554 | " as an expression.\n"); | |
8b93c638 JM |
555 | return NULL; |
556 | } | |
557 | ||
558 | var->format = variable_default_display (var); | |
559 | var->root->valid_block = innermost_block; | |
1b36a34b | 560 | var->name = xstrdup (expression); |
02142340 | 561 | /* For a root var, the name and the expr are the same. */ |
1b36a34b | 562 | var->path_expr = xstrdup (expression); |
8b93c638 JM |
563 | |
564 | /* When the frame is different from the current frame, | |
565 | we must select the appropriate frame before parsing | |
566 | the expression, otherwise the value will not be current. | |
567 | Since select_frame is so benign, just call it for all cases. */ | |
44a67aa7 | 568 | if (innermost_block && fi != NULL) |
8b93c638 | 569 | { |
7a424e99 | 570 | var->root->frame = get_frame_id (fi); |
c5b48eac | 571 | var->root->thread_id = pid_to_thread_id (inferior_ptid); |
206415a3 | 572 | old_fi = get_selected_frame (NULL); |
c5b48eac | 573 | select_frame (fi); |
8b93c638 JM |
574 | } |
575 | ||
340a7723 | 576 | /* We definitely need to catch errors here. |
8b93c638 JM |
577 | If evaluate_expression succeeds we got the value we wanted. |
578 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb | 579 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
e55dccf0 VP |
580 | { |
581 | /* Error getting the value. Try to at least get the | |
582 | right type. */ | |
583 | struct value *type_only_value = evaluate_type (var->root->exp); | |
584 | var->type = value_type (type_only_value); | |
585 | } | |
586 | else | |
587 | var->type = value_type (value); | |
acd65feb | 588 | |
acd65feb | 589 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
590 | |
591 | /* Set language info */ | |
592 | lang = variable_language (var); | |
d5d6fca5 | 593 | var->root->lang = &languages[lang]; |
8b93c638 JM |
594 | |
595 | /* Set ourselves as our root */ | |
596 | var->root->rootvar = var; | |
597 | ||
598 | /* Reset the selected frame */ | |
e21458b2 | 599 | if (old_fi != NULL) |
0f7d239c | 600 | select_frame (old_fi); |
8b93c638 JM |
601 | } |
602 | ||
73a93a32 JI |
603 | /* If the variable object name is null, that means this |
604 | is a temporary variable, so don't install it. */ | |
605 | ||
606 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 | 607 | { |
1b36a34b | 608 | var->obj_name = xstrdup (objname); |
8b93c638 JM |
609 | |
610 | /* If a varobj name is duplicated, the install will fail so | |
611 | we must clenup */ | |
612 | if (!install_variable (var)) | |
613 | { | |
614 | do_cleanups (old_chain); | |
615 | return NULL; | |
616 | } | |
617 | } | |
618 | ||
b6313243 | 619 | install_default_visualizer (var); |
8b93c638 JM |
620 | discard_cleanups (old_chain); |
621 | return var; | |
622 | } | |
623 | ||
624 | /* Generates an unique name that can be used for a varobj */ | |
625 | ||
626 | char * | |
627 | varobj_gen_name (void) | |
628 | { | |
629 | static int id = 0; | |
e64d9b3d | 630 | char *obj_name; |
8b93c638 JM |
631 | |
632 | /* generate a name for this object */ | |
633 | id++; | |
b435e160 | 634 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 635 | |
e64d9b3d | 636 | return obj_name; |
8b93c638 JM |
637 | } |
638 | ||
61d8f275 JK |
639 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
640 | error if OBJNAME cannot be found. */ | |
8b93c638 JM |
641 | |
642 | struct varobj * | |
643 | varobj_get_handle (char *objname) | |
644 | { | |
645 | struct vlist *cv; | |
646 | const char *chp; | |
647 | unsigned int index = 0; | |
648 | unsigned int i = 1; | |
649 | ||
650 | for (chp = objname; *chp; chp++) | |
651 | { | |
652 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
653 | } | |
654 | ||
655 | cv = *(varobj_table + index); | |
656 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
657 | cv = cv->next; | |
658 | ||
659 | if (cv == NULL) | |
8a3fe4f8 | 660 | error (_("Variable object not found")); |
8b93c638 JM |
661 | |
662 | return cv->var; | |
663 | } | |
664 | ||
665 | /* Given the handle, return the name of the object */ | |
666 | ||
667 | char * | |
668 | varobj_get_objname (struct varobj *var) | |
669 | { | |
670 | return var->obj_name; | |
671 | } | |
672 | ||
673 | /* Given the handle, return the expression represented by the object */ | |
674 | ||
675 | char * | |
676 | varobj_get_expression (struct varobj *var) | |
677 | { | |
678 | return name_of_variable (var); | |
679 | } | |
680 | ||
681 | /* Deletes a varobj and all its children if only_children == 0, | |
682 | otherwise deletes only the children; returns a malloc'ed list of all the | |
683 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
684 | ||
685 | int | |
686 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
687 | { | |
688 | int delcount; | |
689 | int mycount; | |
690 | struct cpstack *result = NULL; | |
691 | char **cp; | |
692 | ||
693 | /* Initialize a stack for temporary results */ | |
694 | cppush (&result, NULL); | |
695 | ||
696 | if (only_children) | |
697 | /* Delete only the variable children */ | |
698 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
699 | else | |
700 | /* Delete the variable and all its children */ | |
701 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
702 | ||
703 | /* We may have been asked to return a list of what has been deleted */ | |
704 | if (dellist != NULL) | |
705 | { | |
706 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
707 | ||
708 | cp = *dellist; | |
709 | mycount = delcount; | |
710 | *cp = cppop (&result); | |
711 | while ((*cp != NULL) && (mycount > 0)) | |
712 | { | |
713 | mycount--; | |
714 | cp++; | |
715 | *cp = cppop (&result); | |
716 | } | |
717 | ||
718 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 719 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 720 | mycount); |
8b93c638 JM |
721 | } |
722 | ||
723 | return delcount; | |
724 | } | |
725 | ||
b6313243 TT |
726 | /* Convenience function for varobj_set_visualizer. Instantiate a |
727 | pretty-printer for a given value. */ | |
728 | static PyObject * | |
729 | instantiate_pretty_printer (PyObject *constructor, struct value *value) | |
730 | { | |
731 | #if HAVE_PYTHON | |
732 | PyObject *val_obj = NULL; | |
733 | PyObject *printer; | |
734 | volatile struct gdb_exception except; | |
735 | ||
736 | TRY_CATCH (except, RETURN_MASK_ALL) | |
737 | { | |
738 | value = value_copy (value); | |
739 | } | |
740 | GDB_PY_HANDLE_EXCEPTION (except); | |
741 | val_obj = value_to_value_object (value); | |
742 | ||
743 | if (! val_obj) | |
744 | return NULL; | |
745 | ||
746 | printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL); | |
747 | Py_DECREF (val_obj); | |
748 | return printer; | |
749 | #endif | |
750 | return NULL; | |
751 | } | |
752 | ||
8b93c638 JM |
753 | /* Set/Get variable object display format */ |
754 | ||
755 | enum varobj_display_formats | |
756 | varobj_set_display_format (struct varobj *var, | |
757 | enum varobj_display_formats format) | |
758 | { | |
759 | switch (format) | |
760 | { | |
761 | case FORMAT_NATURAL: | |
762 | case FORMAT_BINARY: | |
763 | case FORMAT_DECIMAL: | |
764 | case FORMAT_HEXADECIMAL: | |
765 | case FORMAT_OCTAL: | |
766 | var->format = format; | |
767 | break; | |
768 | ||
769 | default: | |
770 | var->format = variable_default_display (var); | |
771 | } | |
772 | ||
ae7d22a6 VP |
773 | if (varobj_value_is_changeable_p (var) |
774 | && var->value && !value_lazy (var->value)) | |
775 | { | |
6c761d9c | 776 | xfree (var->print_value); |
d452c4bc | 777 | var->print_value = value_get_print_value (var->value, var->format, var); |
ae7d22a6 VP |
778 | } |
779 | ||
8b93c638 JM |
780 | return var->format; |
781 | } | |
782 | ||
783 | enum varobj_display_formats | |
784 | varobj_get_display_format (struct varobj *var) | |
785 | { | |
786 | return var->format; | |
787 | } | |
788 | ||
b6313243 TT |
789 | char * |
790 | varobj_get_display_hint (struct varobj *var) | |
791 | { | |
792 | char *result = NULL; | |
793 | ||
794 | #if HAVE_PYTHON | |
d452c4bc UW |
795 | struct cleanup *back_to = varobj_ensure_python_env (var); |
796 | ||
b6313243 TT |
797 | if (var->pretty_printer) |
798 | result = gdbpy_get_display_hint (var->pretty_printer); | |
d452c4bc UW |
799 | |
800 | do_cleanups (back_to); | |
b6313243 TT |
801 | #endif |
802 | ||
803 | return result; | |
804 | } | |
805 | ||
c5b48eac VP |
806 | /* If the variable object is bound to a specific thread, that |
807 | is its evaluation can always be done in context of a frame | |
808 | inside that thread, returns GDB id of the thread -- which | |
809 | is always positive. Otherwise, returns -1. */ | |
810 | int | |
811 | varobj_get_thread_id (struct varobj *var) | |
812 | { | |
813 | if (var->root->valid_block && var->root->thread_id > 0) | |
814 | return var->root->thread_id; | |
815 | else | |
816 | return -1; | |
817 | } | |
818 | ||
25d5ea92 VP |
819 | void |
820 | varobj_set_frozen (struct varobj *var, int frozen) | |
821 | { | |
822 | /* When a variable is unfrozen, we don't fetch its value. | |
823 | The 'not_fetched' flag remains set, so next -var-update | |
824 | won't complain. | |
825 | ||
826 | We don't fetch the value, because for structures the client | |
827 | should do -var-update anyway. It would be bad to have different | |
828 | client-size logic for structure and other types. */ | |
829 | var->frozen = frozen; | |
830 | } | |
831 | ||
832 | int | |
833 | varobj_get_frozen (struct varobj *var) | |
834 | { | |
835 | return var->frozen; | |
836 | } | |
837 | ||
b6313243 TT |
838 | static int |
839 | update_dynamic_varobj_children (struct varobj *var, | |
840 | VEC (varobj_p) **changed, | |
841 | VEC (varobj_p) **new_and_unchanged, | |
842 | int *cchanged) | |
843 | ||
844 | { | |
845 | #if HAVE_PYTHON | |
846 | /* FIXME: we *might* want to provide this functionality as | |
847 | a standalone function, so that other interested parties | |
848 | than varobj code can benefit for this. */ | |
849 | struct cleanup *back_to; | |
850 | PyObject *children; | |
851 | PyObject *iterator; | |
852 | int i; | |
853 | int children_changed = 0; | |
854 | PyObject *printer = var->pretty_printer; | |
b6313243 | 855 | |
d452c4bc | 856 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
857 | |
858 | *cchanged = 0; | |
859 | if (!PyObject_HasAttr (printer, gdbpy_children_cst)) | |
860 | { | |
861 | do_cleanups (back_to); | |
862 | return 0; | |
863 | } | |
864 | ||
865 | children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst, | |
866 | NULL); | |
867 | ||
868 | if (!children) | |
869 | { | |
870 | gdbpy_print_stack (); | |
da1f2771 | 871 | error (_("Null value returned for children")); |
b6313243 TT |
872 | } |
873 | ||
874 | make_cleanup_py_decref (children); | |
875 | ||
876 | if (!PyIter_Check (children)) | |
da1f2771 | 877 | error (_("Returned value is not iterable")); |
b6313243 TT |
878 | |
879 | iterator = PyObject_GetIter (children); | |
880 | if (!iterator) | |
881 | { | |
882 | gdbpy_print_stack (); | |
da1f2771 | 883 | error (_("Could not get children iterator")); |
b6313243 TT |
884 | } |
885 | make_cleanup_py_decref (iterator); | |
886 | ||
887 | for (i = 0; ; ++i) | |
888 | { | |
889 | PyObject *item = PyIter_Next (iterator); | |
890 | PyObject *py_v; | |
891 | struct value *v; | |
892 | char *name; | |
893 | struct cleanup *inner; | |
894 | ||
895 | if (!item) | |
896 | break; | |
897 | inner = make_cleanup_py_decref (item); | |
898 | ||
899 | if (!PyArg_ParseTuple (item, "sO", &name, &py_v)) | |
da1f2771 | 900 | error (_("Invalid item from the child list")); |
b6313243 TT |
901 | |
902 | if (PyObject_TypeCheck (py_v, &value_object_type)) | |
903 | { | |
904 | /* If we just call convert_value_from_python for this type, | |
905 | we won't know who owns the result. For this one case we | |
906 | need to copy the resulting value. */ | |
907 | v = value_object_to_value (py_v); | |
908 | v = value_copy (v); | |
909 | } | |
910 | else | |
911 | v = convert_value_from_python (py_v); | |
912 | ||
913 | /* TODO: This assume the name of the i-th child never changes. */ | |
914 | ||
915 | /* Now see what to do here. */ | |
916 | if (VEC_length (varobj_p, var->children) < i + 1) | |
917 | { | |
918 | /* There's no child yet. */ | |
919 | struct varobj *child = varobj_add_child (var, name, v); | |
920 | if (new_and_unchanged) | |
921 | VEC_safe_push (varobj_p, *new_and_unchanged, child); | |
922 | children_changed = 1; | |
923 | } | |
924 | else | |
925 | { | |
926 | varobj_p existing = VEC_index (varobj_p, var->children, i); | |
927 | if (install_new_value (existing, v, 0) && changed) | |
928 | { | |
929 | if (changed) | |
930 | VEC_safe_push (varobj_p, *changed, existing); | |
931 | } | |
932 | else | |
933 | { | |
934 | if (new_and_unchanged) | |
935 | VEC_safe_push (varobj_p, *new_and_unchanged, existing); | |
936 | } | |
937 | } | |
938 | ||
939 | do_cleanups (inner); | |
940 | } | |
941 | ||
942 | if (i < VEC_length (varobj_p, var->children)) | |
943 | { | |
944 | int i; | |
945 | children_changed = 1; | |
946 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) | |
947 | varobj_delete (VEC_index (varobj_p, var->children, i), NULL, 0); | |
948 | } | |
949 | VEC_truncate (varobj_p, var->children, i); | |
950 | var->num_children = VEC_length (varobj_p, var->children); | |
951 | ||
952 | do_cleanups (back_to); | |
953 | ||
954 | *cchanged = children_changed; | |
955 | return 1; | |
956 | #else | |
957 | gdb_assert (0 && "should never be called if Python is not enabled"); | |
958 | #endif | |
959 | } | |
25d5ea92 | 960 | |
8b93c638 JM |
961 | int |
962 | varobj_get_num_children (struct varobj *var) | |
963 | { | |
964 | if (var->num_children == -1) | |
b6313243 TT |
965 | { |
966 | int changed; | |
967 | if (!var->pretty_printer | |
968 | || !update_dynamic_varobj_children (var, NULL, NULL, &changed)) | |
969 | var->num_children = number_of_children (var); | |
970 | } | |
8b93c638 JM |
971 | |
972 | return var->num_children; | |
973 | } | |
974 | ||
975 | /* Creates a list of the immediate children of a variable object; | |
976 | the return code is the number of such children or -1 on error */ | |
977 | ||
d56d46f5 VP |
978 | VEC (varobj_p)* |
979 | varobj_list_children (struct varobj *var) | |
8b93c638 JM |
980 | { |
981 | struct varobj *child; | |
982 | char *name; | |
b6313243 TT |
983 | int i, children_changed; |
984 | ||
985 | var->children_requested = 1; | |
986 | ||
987 | if (var->pretty_printer | |
988 | /* This, in theory, can result in the number of children changing without | |
989 | frontend noticing. But well, calling -var-list-children on the same | |
990 | varobj twice is not something a sane frontend would do. */ | |
991 | && update_dynamic_varobj_children (var, NULL, NULL, &children_changed)) | |
992 | return var->children; | |
8b93c638 | 993 | |
8b93c638 JM |
994 | if (var->num_children == -1) |
995 | var->num_children = number_of_children (var); | |
996 | ||
74a44383 DJ |
997 | /* If that failed, give up. */ |
998 | if (var->num_children == -1) | |
d56d46f5 | 999 | return var->children; |
74a44383 | 1000 | |
28335dcc VP |
1001 | /* If we're called when the list of children is not yet initialized, |
1002 | allocate enough elements in it. */ | |
1003 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
1004 | VEC_safe_push (varobj_p, var->children, NULL); | |
1005 | ||
8b93c638 JM |
1006 | for (i = 0; i < var->num_children; i++) |
1007 | { | |
d56d46f5 | 1008 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
1009 | |
1010 | if (existing == NULL) | |
1011 | { | |
1012 | /* Either it's the first call to varobj_list_children for | |
1013 | this variable object, and the child was never created, | |
1014 | or it was explicitly deleted by the client. */ | |
1015 | name = name_of_child (var, i); | |
1016 | existing = create_child (var, i, name); | |
1017 | VEC_replace (varobj_p, var->children, i, existing); | |
b6313243 | 1018 | install_default_visualizer (existing); |
28335dcc | 1019 | } |
8b93c638 JM |
1020 | } |
1021 | ||
d56d46f5 | 1022 | return var->children; |
8b93c638 JM |
1023 | } |
1024 | ||
b6313243 TT |
1025 | static struct varobj * |
1026 | varobj_add_child (struct varobj *var, const char *name, struct value *value) | |
1027 | { | |
1028 | varobj_p v = create_child_with_value (var, | |
1029 | VEC_length (varobj_p, var->children), | |
1030 | name, value); | |
1031 | VEC_safe_push (varobj_p, var->children, v); | |
1032 | install_default_visualizer (v); | |
1033 | return v; | |
1034 | } | |
1035 | ||
8b93c638 JM |
1036 | /* Obtain the type of an object Variable as a string similar to the one gdb |
1037 | prints on the console */ | |
1038 | ||
1039 | char * | |
1040 | varobj_get_type (struct varobj *var) | |
1041 | { | |
8b93c638 | 1042 | /* For the "fake" variables, do not return a type. (It's type is |
8756216b DP |
1043 | NULL, too.) |
1044 | Do not return a type for invalid variables as well. */ | |
1045 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
1046 | return NULL; |
1047 | ||
1a4300e9 | 1048 | return type_to_string (var->type); |
8b93c638 JM |
1049 | } |
1050 | ||
1ecb4ee0 DJ |
1051 | /* Obtain the type of an object variable. */ |
1052 | ||
1053 | struct type * | |
1054 | varobj_get_gdb_type (struct varobj *var) | |
1055 | { | |
1056 | return var->type; | |
1057 | } | |
1058 | ||
02142340 VP |
1059 | /* Return a pointer to the full rooted expression of varobj VAR. |
1060 | If it has not been computed yet, compute it. */ | |
1061 | char * | |
1062 | varobj_get_path_expr (struct varobj *var) | |
1063 | { | |
1064 | if (var->path_expr != NULL) | |
1065 | return var->path_expr; | |
1066 | else | |
1067 | { | |
1068 | /* For root varobjs, we initialize path_expr | |
1069 | when creating varobj, so here it should be | |
1070 | child varobj. */ | |
1071 | gdb_assert (!is_root_p (var)); | |
1072 | return (*var->root->lang->path_expr_of_child) (var); | |
1073 | } | |
1074 | } | |
1075 | ||
8b93c638 JM |
1076 | enum varobj_languages |
1077 | varobj_get_language (struct varobj *var) | |
1078 | { | |
1079 | return variable_language (var); | |
1080 | } | |
1081 | ||
1082 | int | |
1083 | varobj_get_attributes (struct varobj *var) | |
1084 | { | |
1085 | int attributes = 0; | |
1086 | ||
340a7723 | 1087 | if (varobj_editable_p (var)) |
8b93c638 JM |
1088 | /* FIXME: define masks for attributes */ |
1089 | attributes |= 0x00000001; /* Editable */ | |
1090 | ||
1091 | return attributes; | |
1092 | } | |
1093 | ||
de051565 MK |
1094 | char * |
1095 | varobj_get_formatted_value (struct varobj *var, | |
1096 | enum varobj_display_formats format) | |
1097 | { | |
1098 | return my_value_of_variable (var, format); | |
1099 | } | |
1100 | ||
8b93c638 JM |
1101 | char * |
1102 | varobj_get_value (struct varobj *var) | |
1103 | { | |
de051565 | 1104 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
1105 | } |
1106 | ||
1107 | /* Set the value of an object variable (if it is editable) to the | |
1108 | value of the given expression */ | |
1109 | /* Note: Invokes functions that can call error() */ | |
1110 | ||
1111 | int | |
1112 | varobj_set_value (struct varobj *var, char *expression) | |
1113 | { | |
30b28db1 | 1114 | struct value *val; |
8b93c638 | 1115 | int offset = 0; |
a6c442d8 | 1116 | int error = 0; |
8b93c638 JM |
1117 | |
1118 | /* The argument "expression" contains the variable's new value. | |
1119 | We need to first construct a legal expression for this -- ugh! */ | |
1120 | /* Does this cover all the bases? */ | |
1121 | struct expression *exp; | |
30b28db1 | 1122 | struct value *value; |
8b93c638 | 1123 | int saved_input_radix = input_radix; |
340a7723 NR |
1124 | char *s = expression; |
1125 | int i; | |
8b93c638 | 1126 | |
340a7723 | 1127 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 1128 | |
340a7723 NR |
1129 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ |
1130 | exp = parse_exp_1 (&s, 0, 0); | |
1131 | if (!gdb_evaluate_expression (exp, &value)) | |
1132 | { | |
1133 | /* We cannot proceed without a valid expression. */ | |
1134 | xfree (exp); | |
1135 | return 0; | |
8b93c638 JM |
1136 | } |
1137 | ||
340a7723 NR |
1138 | /* All types that are editable must also be changeable. */ |
1139 | gdb_assert (varobj_value_is_changeable_p (var)); | |
1140 | ||
1141 | /* The value of a changeable variable object must not be lazy. */ | |
1142 | gdb_assert (!value_lazy (var->value)); | |
1143 | ||
1144 | /* Need to coerce the input. We want to check if the | |
1145 | value of the variable object will be different | |
1146 | after assignment, and the first thing value_assign | |
1147 | does is coerce the input. | |
1148 | For example, if we are assigning an array to a pointer variable we | |
1149 | should compare the pointer with the the array's address, not with the | |
1150 | array's content. */ | |
1151 | value = coerce_array (value); | |
1152 | ||
1153 | /* The new value may be lazy. gdb_value_assign, or | |
1154 | rather value_contents, will take care of this. | |
1155 | If fetching of the new value will fail, gdb_value_assign | |
1156 | with catch the exception. */ | |
1157 | if (!gdb_value_assign (var->value, value, &val)) | |
1158 | return 0; | |
1159 | ||
1160 | /* If the value has changed, record it, so that next -var-update can | |
1161 | report this change. If a variable had a value of '1', we've set it | |
1162 | to '333' and then set again to '1', when -var-update will report this | |
1163 | variable as changed -- because the first assignment has set the | |
1164 | 'updated' flag. There's no need to optimize that, because return value | |
1165 | of -var-update should be considered an approximation. */ | |
1166 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
1167 | input_radix = saved_input_radix; | |
1168 | return 1; | |
8b93c638 JM |
1169 | } |
1170 | ||
acd65feb VP |
1171 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
1172 | this is the first assignement after the variable object was just | |
1173 | created, or changed type. In that case, just assign the value | |
1174 | and return 0. | |
ee342b23 VP |
1175 | Otherwise, assign the new value, and return 1 if the value is different |
1176 | from the current one, 0 otherwise. The comparison is done on textual | |
1177 | representation of value. Therefore, some types need not be compared. E.g. | |
1178 | for structures the reported value is always "{...}", so no comparison is | |
1179 | necessary here. If the old value was NULL and new one is not, or vice versa, | |
1180 | we always return 1. | |
b26ed50d VP |
1181 | |
1182 | The VALUE parameter should not be released -- the function will | |
1183 | take care of releasing it when needed. */ | |
acd65feb VP |
1184 | static int |
1185 | install_new_value (struct varobj *var, struct value *value, int initial) | |
1186 | { | |
1187 | int changeable; | |
1188 | int need_to_fetch; | |
1189 | int changed = 0; | |
25d5ea92 | 1190 | int intentionally_not_fetched = 0; |
7a4d50bf | 1191 | char *print_value = NULL; |
acd65feb | 1192 | |
acd65feb VP |
1193 | /* We need to know the varobj's type to decide if the value should |
1194 | be fetched or not. C++ fake children (public/protected/private) don't have | |
1195 | a type. */ | |
1196 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 1197 | changeable = varobj_value_is_changeable_p (var); |
b6313243 TT |
1198 | |
1199 | /* If the type has custom visualizer, we consider it to be always | |
1200 | changeable. FIXME: need to make sure this behaviour will not | |
1201 | mess up read-sensitive values. */ | |
1202 | if (var->pretty_printer) | |
1203 | changeable = 1; | |
1204 | ||
acd65feb VP |
1205 | need_to_fetch = changeable; |
1206 | ||
b26ed50d VP |
1207 | /* We are not interested in the address of references, and given |
1208 | that in C++ a reference is not rebindable, it cannot | |
1209 | meaningfully change. So, get hold of the real value. */ | |
1210 | if (value) | |
1211 | { | |
1212 | value = coerce_ref (value); | |
1213 | release_value (value); | |
1214 | } | |
1215 | ||
acd65feb VP |
1216 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1217 | /* For unions, we need to fetch the value implicitly because | |
1218 | of implementation of union member fetch. When gdb | |
1219 | creates a value for a field and the value of the enclosing | |
1220 | structure is not lazy, it immediately copies the necessary | |
1221 | bytes from the enclosing values. If the enclosing value is | |
1222 | lazy, the call to value_fetch_lazy on the field will read | |
1223 | the data from memory. For unions, that means we'll read the | |
1224 | same memory more than once, which is not desirable. So | |
1225 | fetch now. */ | |
1226 | need_to_fetch = 1; | |
1227 | ||
1228 | /* The new value might be lazy. If the type is changeable, | |
1229 | that is we'll be comparing values of this type, fetch the | |
1230 | value now. Otherwise, on the next update the old value | |
1231 | will be lazy, which means we've lost that old value. */ | |
1232 | if (need_to_fetch && value && value_lazy (value)) | |
1233 | { | |
25d5ea92 VP |
1234 | struct varobj *parent = var->parent; |
1235 | int frozen = var->frozen; | |
1236 | for (; !frozen && parent; parent = parent->parent) | |
1237 | frozen |= parent->frozen; | |
1238 | ||
1239 | if (frozen && initial) | |
1240 | { | |
1241 | /* For variables that are frozen, or are children of frozen | |
1242 | variables, we don't do fetch on initial assignment. | |
1243 | For non-initial assignemnt we do the fetch, since it means we're | |
1244 | explicitly asked to compare the new value with the old one. */ | |
1245 | intentionally_not_fetched = 1; | |
1246 | } | |
1247 | else if (!gdb_value_fetch_lazy (value)) | |
acd65feb | 1248 | { |
acd65feb VP |
1249 | /* Set the value to NULL, so that for the next -var-update, |
1250 | we don't try to compare the new value with this value, | |
1251 | that we couldn't even read. */ | |
1252 | value = NULL; | |
1253 | } | |
acd65feb VP |
1254 | } |
1255 | ||
b6313243 | 1256 | |
7a4d50bf VP |
1257 | /* Below, we'll be comparing string rendering of old and new |
1258 | values. Don't get string rendering if the value is | |
1259 | lazy -- if it is, the code above has decided that the value | |
1260 | should not be fetched. */ | |
1261 | if (value && !value_lazy (value)) | |
d452c4bc | 1262 | print_value = value_get_print_value (value, var->format, var); |
7a4d50bf | 1263 | |
acd65feb VP |
1264 | /* If the type is changeable, compare the old and the new values. |
1265 | If this is the initial assignment, we don't have any old value | |
1266 | to compare with. */ | |
7a4d50bf | 1267 | if (!initial && changeable) |
acd65feb VP |
1268 | { |
1269 | /* If the value of the varobj was changed by -var-set-value, then the | |
1270 | value in the varobj and in the target is the same. However, that value | |
1271 | is different from the value that the varobj had after the previous | |
57e66780 | 1272 | -var-update. So need to the varobj as changed. */ |
acd65feb | 1273 | if (var->updated) |
57e66780 | 1274 | { |
57e66780 DJ |
1275 | changed = 1; |
1276 | } | |
acd65feb VP |
1277 | else |
1278 | { | |
1279 | /* Try to compare the values. That requires that both | |
1280 | values are non-lazy. */ | |
25d5ea92 VP |
1281 | if (var->not_fetched && value_lazy (var->value)) |
1282 | { | |
1283 | /* This is a frozen varobj and the value was never read. | |
1284 | Presumably, UI shows some "never read" indicator. | |
1285 | Now that we've fetched the real value, we need to report | |
1286 | this varobj as changed so that UI can show the real | |
1287 | value. */ | |
1288 | changed = 1; | |
1289 | } | |
1290 | else if (var->value == NULL && value == NULL) | |
acd65feb VP |
1291 | /* Equal. */ |
1292 | ; | |
1293 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1294 | { |
57e66780 DJ |
1295 | changed = 1; |
1296 | } | |
acd65feb VP |
1297 | else |
1298 | { | |
1299 | gdb_assert (!value_lazy (var->value)); | |
1300 | gdb_assert (!value_lazy (value)); | |
85265413 | 1301 | |
57e66780 | 1302 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1303 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1304 | changed = 1; |
acd65feb VP |
1305 | } |
1306 | } | |
1307 | } | |
85265413 | 1308 | |
ee342b23 VP |
1309 | if (!initial && !changeable) |
1310 | { | |
1311 | /* For values that are not changeable, we don't compare the values. | |
1312 | However, we want to notice if a value was not NULL and now is NULL, | |
1313 | or vise versa, so that we report when top-level varobjs come in scope | |
1314 | and leave the scope. */ | |
1315 | changed = (var->value != NULL) != (value != NULL); | |
1316 | } | |
1317 | ||
acd65feb | 1318 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1319 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1320 | value_free (var->value); |
1321 | var->value = value; | |
7a4d50bf VP |
1322 | if (var->print_value) |
1323 | xfree (var->print_value); | |
1324 | var->print_value = print_value; | |
25d5ea92 VP |
1325 | if (value && value_lazy (value) && intentionally_not_fetched) |
1326 | var->not_fetched = 1; | |
1327 | else | |
1328 | var->not_fetched = 0; | |
acd65feb | 1329 | var->updated = 0; |
85265413 | 1330 | |
b26ed50d | 1331 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1332 | |
1333 | return changed; | |
1334 | } | |
acd65feb | 1335 | |
b6313243 TT |
1336 | static void |
1337 | install_visualizer (struct varobj *var, PyObject *visualizer) | |
1338 | { | |
1339 | #if HAVE_PYTHON | |
1340 | /* If there are any children now, wipe them. */ | |
1341 | varobj_delete (var, NULL, 1 /* children only */); | |
1342 | var->num_children = -1; | |
1343 | ||
1344 | Py_XDECREF (var->pretty_printer); | |
1345 | var->pretty_printer = visualizer; | |
1346 | ||
1347 | install_new_value (var, var->value, 1); | |
1348 | ||
1349 | /* If we removed the visualizer, and the user ever requested the | |
1350 | object's children, then we must compute the list of children. | |
1351 | Note that we needn't do this when installing a visualizer, | |
1352 | because updating will recompute dynamic children. */ | |
1353 | if (!visualizer && var->children_requested) | |
1354 | varobj_list_children (var); | |
1355 | #else | |
da1f2771 | 1356 | error (_("Python support required")); |
b6313243 TT |
1357 | #endif |
1358 | } | |
1359 | ||
1360 | static void | |
1361 | install_default_visualizer (struct varobj *var) | |
1362 | { | |
1363 | #if HAVE_PYTHON | |
1364 | struct cleanup *cleanup; | |
b6313243 TT |
1365 | PyObject *pretty_printer = NULL; |
1366 | ||
d452c4bc | 1367 | cleanup = varobj_ensure_python_env (var); |
b6313243 TT |
1368 | |
1369 | if (var->value) | |
1370 | { | |
1371 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value); | |
1372 | if (! pretty_printer) | |
1373 | { | |
1374 | gdbpy_print_stack (); | |
1375 | error (_("Cannot instantiate printer for default visualizer")); | |
1376 | } | |
1377 | } | |
1378 | ||
1379 | if (pretty_printer == Py_None) | |
1380 | { | |
1381 | Py_DECREF (pretty_printer); | |
1382 | pretty_printer = NULL; | |
1383 | } | |
1384 | ||
1385 | install_visualizer (var, pretty_printer); | |
1386 | do_cleanups (cleanup); | |
1387 | #else | |
1388 | /* No error is right as this function is inserted just as a hook. */ | |
1389 | #endif | |
1390 | } | |
1391 | ||
1392 | void | |
1393 | varobj_set_visualizer (struct varobj *var, const char *visualizer) | |
1394 | { | |
1395 | #if HAVE_PYTHON | |
1396 | PyObject *mainmod, *globals, *pretty_printer, *constructor; | |
1397 | struct cleanup *back_to, *value; | |
b6313243 | 1398 | |
d452c4bc | 1399 | back_to = varobj_ensure_python_env (var); |
b6313243 TT |
1400 | |
1401 | mainmod = PyImport_AddModule ("__main__"); | |
1402 | globals = PyModule_GetDict (mainmod); | |
1403 | Py_INCREF (globals); | |
1404 | make_cleanup_py_decref (globals); | |
1405 | ||
1406 | constructor = PyRun_String (visualizer, Py_eval_input, globals, globals); | |
1407 | ||
1408 | /* Do not instantiate NoneType. */ | |
1409 | if (constructor == Py_None) | |
1410 | { | |
1411 | pretty_printer = Py_None; | |
1412 | Py_INCREF (pretty_printer); | |
1413 | } | |
1414 | else | |
1415 | pretty_printer = instantiate_pretty_printer (constructor, var->value); | |
1416 | ||
1417 | Py_XDECREF (constructor); | |
1418 | ||
1419 | if (! pretty_printer) | |
1420 | { | |
1421 | gdbpy_print_stack (); | |
da1f2771 | 1422 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
b6313243 TT |
1423 | } |
1424 | ||
1425 | if (pretty_printer == Py_None) | |
1426 | { | |
1427 | Py_DECREF (pretty_printer); | |
1428 | pretty_printer = NULL; | |
1429 | } | |
1430 | ||
1431 | install_visualizer (var, pretty_printer); | |
1432 | ||
1433 | do_cleanups (back_to); | |
1434 | #else | |
da1f2771 | 1435 | error (_("Python support required")); |
b6313243 TT |
1436 | #endif |
1437 | } | |
1438 | ||
8b93c638 JM |
1439 | /* Update the values for a variable and its children. This is a |
1440 | two-pronged attack. First, re-parse the value for the root's | |
1441 | expression to see if it's changed. Then go all the way | |
1442 | through its children, reconstructing them and noting if they've | |
1443 | changed. | |
1444 | ||
25d5ea92 VP |
1445 | The EXPLICIT parameter specifies if this call is result |
1446 | of MI request to update this specific variable, or | |
1447 | result of implicit -var-update *. For implicit request, we don't | |
1448 | update frozen variables. | |
705da579 KS |
1449 | |
1450 | NOTE: This function may delete the caller's varobj. If it | |
8756216b DP |
1451 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1452 | to point to the new varobj. */ | |
8b93c638 | 1453 | |
f7f9ae2c | 1454 | VEC(varobj_update_result) *varobj_update (struct varobj **varp, int explicit) |
8b93c638 JM |
1455 | { |
1456 | int changed = 0; | |
25d5ea92 | 1457 | int type_changed = 0; |
8b93c638 JM |
1458 | int i; |
1459 | int vleft; | |
8b93c638 JM |
1460 | struct varobj *v; |
1461 | struct varobj **cv; | |
2c67cb8b | 1462 | struct varobj **templist = NULL; |
30b28db1 | 1463 | struct value *new; |
b6313243 | 1464 | VEC (varobj_update_result) *stack = NULL; |
f7f9ae2c | 1465 | VEC (varobj_update_result) *result = NULL; |
e64d9b3d | 1466 | struct frame_info *fi; |
8b93c638 | 1467 | |
25d5ea92 VP |
1468 | /* Frozen means frozen -- we don't check for any change in |
1469 | this varobj, including its going out of scope, or | |
1470 | changing type. One use case for frozen varobjs is | |
1471 | retaining previously evaluated expressions, and we don't | |
1472 | want them to be reevaluated at all. */ | |
1473 | if (!explicit && (*varp)->frozen) | |
f7f9ae2c | 1474 | return result; |
8756216b DP |
1475 | |
1476 | if (!(*varp)->root->is_valid) | |
f7f9ae2c VP |
1477 | { |
1478 | varobj_update_result r = {*varp}; | |
1479 | r.status = VAROBJ_INVALID; | |
1480 | VEC_safe_push (varobj_update_result, result, &r); | |
1481 | return result; | |
1482 | } | |
8b93c638 | 1483 | |
25d5ea92 | 1484 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1485 | { |
f7f9ae2c VP |
1486 | varobj_update_result r = {*varp}; |
1487 | r.status = VAROBJ_IN_SCOPE; | |
1488 | ||
25d5ea92 VP |
1489 | /* Update the root variable. value_of_root can return NULL |
1490 | if the variable is no longer around, i.e. we stepped out of | |
1491 | the frame in which a local existed. We are letting the | |
1492 | value_of_root variable dispose of the varobj if the type | |
1493 | has changed. */ | |
25d5ea92 | 1494 | new = value_of_root (varp, &type_changed); |
f7f9ae2c VP |
1495 | r.varobj = *varp; |
1496 | ||
1497 | r.type_changed = type_changed; | |
ea56f9c2 | 1498 | if (install_new_value ((*varp), new, type_changed)) |
f7f9ae2c | 1499 | r.changed = 1; |
ea56f9c2 | 1500 | |
25d5ea92 | 1501 | if (new == NULL) |
f7f9ae2c | 1502 | r.status = VAROBJ_NOT_IN_SCOPE; |
b6313243 | 1503 | r.value_installed = 1; |
f7f9ae2c VP |
1504 | |
1505 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
b6313243 | 1506 | { |
0b4bc29a JK |
1507 | if (r.type_changed || r.changed) |
1508 | VEC_safe_push (varobj_update_result, result, &r); | |
b6313243 TT |
1509 | return result; |
1510 | } | |
1511 | ||
1512 | VEC_safe_push (varobj_update_result, stack, &r); | |
1513 | } | |
1514 | else | |
1515 | { | |
1516 | varobj_update_result r = {*varp}; | |
1517 | VEC_safe_push (varobj_update_result, stack, &r); | |
b20d8971 | 1518 | } |
8b93c638 | 1519 | |
8756216b | 1520 | /* Walk through the children, reconstructing them all. */ |
b6313243 | 1521 | while (!VEC_empty (varobj_update_result, stack)) |
8b93c638 | 1522 | { |
b6313243 TT |
1523 | varobj_update_result r = *(VEC_last (varobj_update_result, stack)); |
1524 | struct varobj *v = r.varobj; | |
1525 | ||
1526 | VEC_pop (varobj_update_result, stack); | |
1527 | ||
1528 | /* Update this variable, unless it's a root, which is already | |
1529 | updated. */ | |
1530 | if (!r.value_installed) | |
1531 | { | |
1532 | new = value_of_child (v->parent, v->index); | |
1533 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1534 | { | |
1535 | r.changed = 1; | |
1536 | v->updated = 0; | |
1537 | } | |
1538 | } | |
1539 | ||
1540 | /* We probably should not get children of a varobj that has a | |
1541 | pretty-printer, but for which -var-list-children was never | |
1542 | invoked. Presumably, such varobj is not yet expanded in the | |
1543 | UI, so we need not bother getting it. */ | |
1544 | if (v->pretty_printer) | |
1545 | { | |
1546 | VEC (varobj_p) *changed = 0, *new_and_unchanged = 0; | |
1547 | int i, children_changed; | |
1548 | varobj_p tmp; | |
1549 | ||
1550 | if (!v->children_requested) | |
1551 | continue; | |
1552 | ||
1553 | if (v->frozen) | |
1554 | continue; | |
1555 | ||
1556 | /* If update_dynamic_varobj_children returns 0, then we have | |
1557 | a non-conforming pretty-printer, so we skip it. */ | |
1558 | if (update_dynamic_varobj_children (v, &changed, &new_and_unchanged, | |
1559 | &children_changed)) | |
1560 | { | |
1561 | if (children_changed) | |
1562 | r.children_changed = 1; | |
1563 | for (i = 0; VEC_iterate (varobj_p, changed, i, tmp); ++i) | |
1564 | { | |
1565 | varobj_update_result r = {tmp}; | |
1566 | r.changed = 1; | |
1567 | r.value_installed = 1; | |
1568 | VEC_safe_push (varobj_update_result, stack, &r); | |
1569 | } | |
1570 | for (i = 0; | |
1571 | VEC_iterate (varobj_p, new_and_unchanged, i, tmp); | |
1572 | ++i) | |
1573 | { | |
1574 | varobj_update_result r = {tmp}; | |
1575 | r.value_installed = 1; | |
1576 | VEC_safe_push (varobj_update_result, stack, &r); | |
1577 | } | |
1578 | if (r.changed || r.children_changed) | |
1579 | VEC_safe_push (varobj_update_result, result, &r); | |
1580 | continue; | |
1581 | } | |
1582 | } | |
28335dcc VP |
1583 | |
1584 | /* Push any children. Use reverse order so that the first | |
1585 | child is popped from the work stack first, and so | |
1586 | will be added to result first. This does not | |
1587 | affect correctness, just "nicer". */ | |
1588 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1589 | { |
28335dcc VP |
1590 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1591 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
25d5ea92 | 1592 | if (c != NULL && !c->frozen) |
28335dcc | 1593 | { |
b6313243 TT |
1594 | varobj_update_result r = {c}; |
1595 | VEC_safe_push (varobj_update_result, stack, &r); | |
28335dcc | 1596 | } |
8b93c638 | 1597 | } |
b6313243 TT |
1598 | |
1599 | if (r.changed || r.type_changed) | |
1600 | VEC_safe_push (varobj_update_result, result, &r); | |
8b93c638 JM |
1601 | } |
1602 | ||
b6313243 TT |
1603 | VEC_free (varobj_update_result, stack); |
1604 | ||
f7f9ae2c | 1605 | return result; |
8b93c638 JM |
1606 | } |
1607 | \f | |
1608 | ||
1609 | /* Helper functions */ | |
1610 | ||
1611 | /* | |
1612 | * Variable object construction/destruction | |
1613 | */ | |
1614 | ||
1615 | static int | |
fba45db2 KB |
1616 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1617 | int only_children_p) | |
8b93c638 JM |
1618 | { |
1619 | int delcount = 0; | |
1620 | ||
1621 | delete_variable_1 (resultp, &delcount, var, | |
1622 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1623 | ||
1624 | return delcount; | |
1625 | } | |
1626 | ||
1627 | /* Delete the variable object VAR and its children */ | |
1628 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1629 | and the parent is not removed we dump core. It must be always | |
1630 | initially called with remove_from_parent_p set */ | |
1631 | static void | |
72330bd6 AC |
1632 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1633 | struct varobj *var, int only_children_p, | |
1634 | int remove_from_parent_p) | |
8b93c638 | 1635 | { |
28335dcc | 1636 | int i; |
8b93c638 JM |
1637 | |
1638 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1639 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1640 | { | |
1641 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
214270ab VP |
1642 | if (!child) |
1643 | continue; | |
8b93c638 | 1644 | if (!remove_from_parent_p) |
28335dcc VP |
1645 | child->parent = NULL; |
1646 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1647 | } |
28335dcc | 1648 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1649 | |
1650 | /* if we were called to delete only the children we are done here */ | |
1651 | if (only_children_p) | |
1652 | return; | |
1653 | ||
1654 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1655 | /* If the name is null, this is a temporary variable, that has not |
1656 | yet been installed, don't report it, it belongs to the caller... */ | |
1657 | if (var->obj_name != NULL) | |
8b93c638 | 1658 | { |
5b616ba1 | 1659 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1660 | *delcountp = *delcountp + 1; |
1661 | } | |
1662 | ||
1663 | /* If this variable has a parent, remove it from its parent's list */ | |
1664 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1665 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1666 | expensive list search to find the element to remove when we are | |
1667 | discarding the list afterwards */ | |
72330bd6 | 1668 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1669 | { |
28335dcc | 1670 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1671 | } |
72330bd6 | 1672 | |
73a93a32 JI |
1673 | if (var->obj_name != NULL) |
1674 | uninstall_variable (var); | |
8b93c638 JM |
1675 | |
1676 | /* Free memory associated with this variable */ | |
1677 | free_variable (var); | |
1678 | } | |
1679 | ||
1680 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1681 | static int | |
fba45db2 | 1682 | install_variable (struct varobj *var) |
8b93c638 JM |
1683 | { |
1684 | struct vlist *cv; | |
1685 | struct vlist *newvl; | |
1686 | const char *chp; | |
1687 | unsigned int index = 0; | |
1688 | unsigned int i = 1; | |
1689 | ||
1690 | for (chp = var->obj_name; *chp; chp++) | |
1691 | { | |
1692 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1693 | } | |
1694 | ||
1695 | cv = *(varobj_table + index); | |
1696 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1697 | cv = cv->next; | |
1698 | ||
1699 | if (cv != NULL) | |
8a3fe4f8 | 1700 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1701 | |
1702 | /* Add varobj to hash table */ | |
1703 | newvl = xmalloc (sizeof (struct vlist)); | |
1704 | newvl->next = *(varobj_table + index); | |
1705 | newvl->var = var; | |
1706 | *(varobj_table + index) = newvl; | |
1707 | ||
1708 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1709 | if (is_root_p (var)) |
8b93c638 JM |
1710 | { |
1711 | /* Add to list of root variables */ | |
1712 | if (rootlist == NULL) | |
1713 | var->root->next = NULL; | |
1714 | else | |
1715 | var->root->next = rootlist; | |
1716 | rootlist = var->root; | |
8b93c638 JM |
1717 | } |
1718 | ||
1719 | return 1; /* OK */ | |
1720 | } | |
1721 | ||
1722 | /* Unistall the object VAR. */ | |
1723 | static void | |
fba45db2 | 1724 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1725 | { |
1726 | struct vlist *cv; | |
1727 | struct vlist *prev; | |
1728 | struct varobj_root *cr; | |
1729 | struct varobj_root *prer; | |
1730 | const char *chp; | |
1731 | unsigned int index = 0; | |
1732 | unsigned int i = 1; | |
1733 | ||
1734 | /* Remove varobj from hash table */ | |
1735 | for (chp = var->obj_name; *chp; chp++) | |
1736 | { | |
1737 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1738 | } | |
1739 | ||
1740 | cv = *(varobj_table + index); | |
1741 | prev = NULL; | |
1742 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1743 | { | |
1744 | prev = cv; | |
1745 | cv = cv->next; | |
1746 | } | |
1747 | ||
1748 | if (varobjdebug) | |
1749 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1750 | ||
1751 | if (cv == NULL) | |
1752 | { | |
72330bd6 AC |
1753 | warning |
1754 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1755 | var->obj_name); | |
8b93c638 JM |
1756 | return; |
1757 | } | |
1758 | ||
1759 | if (prev == NULL) | |
1760 | *(varobj_table + index) = cv->next; | |
1761 | else | |
1762 | prev->next = cv->next; | |
1763 | ||
b8c9b27d | 1764 | xfree (cv); |
8b93c638 JM |
1765 | |
1766 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1767 | if (is_root_p (var)) |
8b93c638 JM |
1768 | { |
1769 | /* Remove from list of root variables */ | |
1770 | if (rootlist == var->root) | |
1771 | rootlist = var->root->next; | |
1772 | else | |
1773 | { | |
1774 | prer = NULL; | |
1775 | cr = rootlist; | |
1776 | while ((cr != NULL) && (cr->rootvar != var)) | |
1777 | { | |
1778 | prer = cr; | |
1779 | cr = cr->next; | |
1780 | } | |
1781 | if (cr == NULL) | |
1782 | { | |
72330bd6 AC |
1783 | warning |
1784 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1785 | var->obj_name); | |
8b93c638 JM |
1786 | return; |
1787 | } | |
1788 | if (prer == NULL) | |
1789 | rootlist = NULL; | |
1790 | else | |
1791 | prer->next = cr->next; | |
1792 | } | |
8b93c638 JM |
1793 | } |
1794 | ||
1795 | } | |
1796 | ||
8b93c638 JM |
1797 | /* Create and install a child of the parent of the given name */ |
1798 | static struct varobj * | |
fba45db2 | 1799 | create_child (struct varobj *parent, int index, char *name) |
b6313243 TT |
1800 | { |
1801 | return create_child_with_value (parent, index, name, | |
1802 | value_of_child (parent, index)); | |
1803 | } | |
1804 | ||
1805 | static struct varobj * | |
1806 | create_child_with_value (struct varobj *parent, int index, const char *name, | |
1807 | struct value *value) | |
8b93c638 JM |
1808 | { |
1809 | struct varobj *child; | |
1810 | char *childs_name; | |
1811 | ||
1812 | child = new_variable (); | |
1813 | ||
1814 | /* name is allocated by name_of_child */ | |
b6313243 TT |
1815 | /* FIXME: xstrdup should not be here. */ |
1816 | child->name = xstrdup (name); | |
8b93c638 | 1817 | child->index = index; |
8b93c638 JM |
1818 | child->parent = parent; |
1819 | child->root = parent->root; | |
b435e160 | 1820 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1821 | child->obj_name = childs_name; |
1822 | install_variable (child); | |
1823 | ||
acd65feb VP |
1824 | /* Compute the type of the child. Must do this before |
1825 | calling install_new_value. */ | |
1826 | if (value != NULL) | |
1827 | /* If the child had no evaluation errors, var->value | |
1828 | will be non-NULL and contain a valid type. */ | |
1829 | child->type = value_type (value); | |
1830 | else | |
1831 | /* Otherwise, we must compute the type. */ | |
1832 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1833 | child->index); | |
1834 | install_new_value (child, value, 1); | |
1835 | ||
8b93c638 JM |
1836 | return child; |
1837 | } | |
8b93c638 JM |
1838 | \f |
1839 | ||
1840 | /* | |
1841 | * Miscellaneous utility functions. | |
1842 | */ | |
1843 | ||
1844 | /* Allocate memory and initialize a new variable */ | |
1845 | static struct varobj * | |
1846 | new_variable (void) | |
1847 | { | |
1848 | struct varobj *var; | |
1849 | ||
1850 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1851 | var->name = NULL; | |
02142340 | 1852 | var->path_expr = NULL; |
8b93c638 JM |
1853 | var->obj_name = NULL; |
1854 | var->index = -1; | |
1855 | var->type = NULL; | |
1856 | var->value = NULL; | |
8b93c638 JM |
1857 | var->num_children = -1; |
1858 | var->parent = NULL; | |
1859 | var->children = NULL; | |
1860 | var->format = 0; | |
1861 | var->root = NULL; | |
fb9b6b35 | 1862 | var->updated = 0; |
85265413 | 1863 | var->print_value = NULL; |
25d5ea92 VP |
1864 | var->frozen = 0; |
1865 | var->not_fetched = 0; | |
b6313243 TT |
1866 | var->children_requested = 0; |
1867 | var->pretty_printer = 0; | |
8b93c638 JM |
1868 | |
1869 | return var; | |
1870 | } | |
1871 | ||
1872 | /* Allocate memory and initialize a new root variable */ | |
1873 | static struct varobj * | |
1874 | new_root_variable (void) | |
1875 | { | |
1876 | struct varobj *var = new_variable (); | |
1877 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1878 | var->root->lang = NULL; | |
1879 | var->root->exp = NULL; | |
1880 | var->root->valid_block = NULL; | |
7a424e99 | 1881 | var->root->frame = null_frame_id; |
a5defcdc | 1882 | var->root->floating = 0; |
8b93c638 | 1883 | var->root->rootvar = NULL; |
8756216b | 1884 | var->root->is_valid = 1; |
8b93c638 JM |
1885 | |
1886 | return var; | |
1887 | } | |
1888 | ||
1889 | /* Free any allocated memory associated with VAR. */ | |
1890 | static void | |
fba45db2 | 1891 | free_variable (struct varobj *var) |
8b93c638 | 1892 | { |
d452c4bc UW |
1893 | #if HAVE_PYTHON |
1894 | if (var->pretty_printer) | |
1895 | { | |
1896 | struct cleanup *cleanup = varobj_ensure_python_env (var); | |
1897 | Py_DECREF (var->pretty_printer); | |
1898 | do_cleanups (cleanup); | |
1899 | } | |
1900 | #endif | |
1901 | ||
36746093 JK |
1902 | value_free (var->value); |
1903 | ||
8b93c638 | 1904 | /* Free the expression if this is a root variable. */ |
b2c2bd75 | 1905 | if (is_root_p (var)) |
8b93c638 | 1906 | { |
3038237c | 1907 | xfree (var->root->exp); |
8038e1e2 | 1908 | xfree (var->root); |
8b93c638 JM |
1909 | } |
1910 | ||
8038e1e2 AC |
1911 | xfree (var->name); |
1912 | xfree (var->obj_name); | |
85265413 | 1913 | xfree (var->print_value); |
02142340 | 1914 | xfree (var->path_expr); |
8038e1e2 | 1915 | xfree (var); |
8b93c638 JM |
1916 | } |
1917 | ||
74b7792f AC |
1918 | static void |
1919 | do_free_variable_cleanup (void *var) | |
1920 | { | |
1921 | free_variable (var); | |
1922 | } | |
1923 | ||
1924 | static struct cleanup * | |
1925 | make_cleanup_free_variable (struct varobj *var) | |
1926 | { | |
1927 | return make_cleanup (do_free_variable_cleanup, var); | |
1928 | } | |
1929 | ||
6766a268 DJ |
1930 | /* This returns the type of the variable. It also skips past typedefs |
1931 | to return the real type of the variable. | |
94b66fa7 KS |
1932 | |
1933 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1934 | except within get_target_type and get_type. */ | |
8b93c638 | 1935 | static struct type * |
fba45db2 | 1936 | get_type (struct varobj *var) |
8b93c638 JM |
1937 | { |
1938 | struct type *type; | |
1939 | type = var->type; | |
1940 | ||
6766a268 DJ |
1941 | if (type != NULL) |
1942 | type = check_typedef (type); | |
8b93c638 JM |
1943 | |
1944 | return type; | |
1945 | } | |
1946 | ||
6e2a9270 VP |
1947 | /* Return the type of the value that's stored in VAR, |
1948 | or that would have being stored there if the | |
1949 | value were accessible. | |
1950 | ||
1951 | This differs from VAR->type in that VAR->type is always | |
1952 | the true type of the expession in the source language. | |
1953 | The return value of this function is the type we're | |
1954 | actually storing in varobj, and using for displaying | |
1955 | the values and for comparing previous and new values. | |
1956 | ||
1957 | For example, top-level references are always stripped. */ | |
1958 | static struct type * | |
1959 | get_value_type (struct varobj *var) | |
1960 | { | |
1961 | struct type *type; | |
1962 | ||
1963 | if (var->value) | |
1964 | type = value_type (var->value); | |
1965 | else | |
1966 | type = var->type; | |
1967 | ||
1968 | type = check_typedef (type); | |
1969 | ||
1970 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1971 | type = get_target_type (type); | |
1972 | ||
1973 | type = check_typedef (type); | |
1974 | ||
1975 | return type; | |
1976 | } | |
1977 | ||
8b93c638 | 1978 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
1979 | past typedefs, just like get_type (). |
1980 | ||
1981 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1982 | except within get_target_type and get_type. */ | |
8b93c638 | 1983 | static struct type * |
fba45db2 | 1984 | get_target_type (struct type *type) |
8b93c638 JM |
1985 | { |
1986 | if (type != NULL) | |
1987 | { | |
1988 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1989 | if (type != NULL) |
1990 | type = check_typedef (type); | |
8b93c638 JM |
1991 | } |
1992 | ||
1993 | return type; | |
1994 | } | |
1995 | ||
1996 | /* What is the default display for this variable? We assume that | |
1997 | everything is "natural". Any exceptions? */ | |
1998 | static enum varobj_display_formats | |
fba45db2 | 1999 | variable_default_display (struct varobj *var) |
8b93c638 JM |
2000 | { |
2001 | return FORMAT_NATURAL; | |
2002 | } | |
2003 | ||
8b93c638 JM |
2004 | /* FIXME: The following should be generic for any pointer */ |
2005 | static void | |
fba45db2 | 2006 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
2007 | { |
2008 | struct cpstack *s; | |
2009 | ||
2010 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
2011 | s->name = name; | |
2012 | s->next = *pstack; | |
2013 | *pstack = s; | |
2014 | } | |
2015 | ||
2016 | /* FIXME: The following should be generic for any pointer */ | |
2017 | static char * | |
fba45db2 | 2018 | cppop (struct cpstack **pstack) |
8b93c638 JM |
2019 | { |
2020 | struct cpstack *s; | |
2021 | char *v; | |
2022 | ||
2023 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
2024 | return NULL; | |
2025 | ||
2026 | s = *pstack; | |
2027 | v = s->name; | |
2028 | *pstack = (*pstack)->next; | |
b8c9b27d | 2029 | xfree (s); |
8b93c638 JM |
2030 | |
2031 | return v; | |
2032 | } | |
2033 | \f | |
2034 | /* | |
2035 | * Language-dependencies | |
2036 | */ | |
2037 | ||
2038 | /* Common entry points */ | |
2039 | ||
2040 | /* Get the language of variable VAR. */ | |
2041 | static enum varobj_languages | |
fba45db2 | 2042 | variable_language (struct varobj *var) |
8b93c638 JM |
2043 | { |
2044 | enum varobj_languages lang; | |
2045 | ||
2046 | switch (var->root->exp->language_defn->la_language) | |
2047 | { | |
2048 | default: | |
2049 | case language_c: | |
2050 | lang = vlang_c; | |
2051 | break; | |
2052 | case language_cplus: | |
2053 | lang = vlang_cplus; | |
2054 | break; | |
2055 | case language_java: | |
2056 | lang = vlang_java; | |
2057 | break; | |
2058 | } | |
2059 | ||
2060 | return lang; | |
2061 | } | |
2062 | ||
2063 | /* Return the number of children for a given variable. | |
2064 | The result of this function is defined by the language | |
2065 | implementation. The number of children returned by this function | |
2066 | is the number of children that the user will see in the variable | |
2067 | display. */ | |
2068 | static int | |
fba45db2 | 2069 | number_of_children (struct varobj *var) |
8b93c638 JM |
2070 | { |
2071 | return (*var->root->lang->number_of_children) (var);; | |
2072 | } | |
2073 | ||
2074 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
2075 | static char * | |
fba45db2 | 2076 | name_of_variable (struct varobj *var) |
8b93c638 JM |
2077 | { |
2078 | return (*var->root->lang->name_of_variable) (var); | |
2079 | } | |
2080 | ||
2081 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
2082 | static char * | |
fba45db2 | 2083 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
2084 | { |
2085 | return (*var->root->lang->name_of_child) (var, index); | |
2086 | } | |
2087 | ||
a5defcdc VP |
2088 | /* What is the ``struct value *'' of the root variable VAR? |
2089 | For floating variable object, evaluation can get us a value | |
2090 | of different type from what is stored in varobj already. In | |
2091 | that case: | |
2092 | - *type_changed will be set to 1 | |
2093 | - old varobj will be freed, and new one will be | |
2094 | created, with the same name. | |
2095 | - *var_handle will be set to the new varobj | |
2096 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 2097 | static struct value * |
fba45db2 | 2098 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 2099 | { |
73a93a32 JI |
2100 | struct varobj *var; |
2101 | ||
2102 | if (var_handle == NULL) | |
2103 | return NULL; | |
2104 | ||
2105 | var = *var_handle; | |
2106 | ||
2107 | /* This should really be an exception, since this should | |
2108 | only get called with a root variable. */ | |
2109 | ||
b2c2bd75 | 2110 | if (!is_root_p (var)) |
73a93a32 JI |
2111 | return NULL; |
2112 | ||
a5defcdc | 2113 | if (var->root->floating) |
73a93a32 JI |
2114 | { |
2115 | struct varobj *tmp_var; | |
2116 | char *old_type, *new_type; | |
6225abfa | 2117 | |
73a93a32 JI |
2118 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
2119 | USE_SELECTED_FRAME); | |
2120 | if (tmp_var == NULL) | |
2121 | { | |
2122 | return NULL; | |
2123 | } | |
6225abfa | 2124 | old_type = varobj_get_type (var); |
73a93a32 | 2125 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 2126 | if (strcmp (old_type, new_type) == 0) |
73a93a32 | 2127 | { |
fcacd99f VP |
2128 | /* The expression presently stored inside var->root->exp |
2129 | remembers the locations of local variables relatively to | |
2130 | the frame where the expression was created (in DWARF location | |
2131 | button, for example). Naturally, those locations are not | |
2132 | correct in other frames, so update the expression. */ | |
2133 | ||
2134 | struct expression *tmp_exp = var->root->exp; | |
2135 | var->root->exp = tmp_var->root->exp; | |
2136 | tmp_var->root->exp = tmp_exp; | |
2137 | ||
73a93a32 JI |
2138 | varobj_delete (tmp_var, NULL, 0); |
2139 | *type_changed = 0; | |
2140 | } | |
2141 | else | |
2142 | { | |
1b36a34b | 2143 | tmp_var->obj_name = xstrdup (var->obj_name); |
a5defcdc VP |
2144 | varobj_delete (var, NULL, 0); |
2145 | ||
73a93a32 JI |
2146 | install_variable (tmp_var); |
2147 | *var_handle = tmp_var; | |
705da579 | 2148 | var = *var_handle; |
73a93a32 JI |
2149 | *type_changed = 1; |
2150 | } | |
74dddad3 MS |
2151 | xfree (old_type); |
2152 | xfree (new_type); | |
73a93a32 JI |
2153 | } |
2154 | else | |
2155 | { | |
2156 | *type_changed = 0; | |
2157 | } | |
2158 | ||
2159 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
2160 | } |
2161 | ||
30b28db1 AC |
2162 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
2163 | static struct value * | |
fba45db2 | 2164 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 2165 | { |
30b28db1 | 2166 | struct value *value; |
8b93c638 JM |
2167 | |
2168 | value = (*parent->root->lang->value_of_child) (parent, index); | |
2169 | ||
8b93c638 JM |
2170 | return value; |
2171 | } | |
2172 | ||
8b93c638 JM |
2173 | /* GDB already has a command called "value_of_variable". Sigh. */ |
2174 | static char * | |
de051565 | 2175 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2176 | { |
8756216b | 2177 | if (var->root->is_valid) |
de051565 | 2178 | return (*var->root->lang->value_of_variable) (var, format); |
8756216b DP |
2179 | else |
2180 | return NULL; | |
8b93c638 JM |
2181 | } |
2182 | ||
85265413 | 2183 | static char * |
b6313243 | 2184 | value_get_print_value (struct value *value, enum varobj_display_formats format, |
d452c4bc | 2185 | struct varobj *var) |
85265413 NR |
2186 | { |
2187 | long dummy; | |
57e66780 DJ |
2188 | struct ui_file *stb; |
2189 | struct cleanup *old_chain; | |
fbb8f299 | 2190 | gdb_byte *thevalue = NULL; |
79a45b7d | 2191 | struct value_print_options opts; |
fbb8f299 | 2192 | int len = 0; |
57e66780 DJ |
2193 | |
2194 | if (value == NULL) | |
2195 | return NULL; | |
2196 | ||
b6313243 TT |
2197 | #if HAVE_PYTHON |
2198 | { | |
d452c4bc UW |
2199 | struct cleanup *back_to = varobj_ensure_python_env (var); |
2200 | PyObject *value_formatter = var->pretty_printer; | |
2201 | ||
b6313243 TT |
2202 | if (value_formatter && PyObject_HasAttr (value_formatter, |
2203 | gdbpy_to_string_cst)) | |
2204 | { | |
2205 | char *hint; | |
2206 | struct value *replacement; | |
2207 | int string_print = 0; | |
fbb8f299 | 2208 | PyObject *output = NULL; |
b6313243 TT |
2209 | |
2210 | hint = gdbpy_get_display_hint (value_formatter); | |
2211 | if (hint) | |
2212 | { | |
2213 | if (!strcmp (hint, "string")) | |
2214 | string_print = 1; | |
2215 | xfree (hint); | |
2216 | } | |
2217 | ||
fbb8f299 PM |
2218 | output = apply_varobj_pretty_printer (value_formatter, |
2219 | &replacement); | |
2220 | if (output) | |
2221 | { | |
2222 | PyObject *py_str = python_string_to_target_python_string (output); | |
2223 | if (py_str) | |
2224 | { | |
2225 | char *s = PyString_AsString (py_str); | |
2226 | len = PyString_Size (py_str); | |
2227 | thevalue = xmemdup (s, len + 1, len + 1); | |
2228 | Py_DECREF (py_str); | |
2229 | } | |
2230 | Py_DECREF (output); | |
2231 | } | |
b6313243 TT |
2232 | if (thevalue && !string_print) |
2233 | { | |
d452c4bc | 2234 | do_cleanups (back_to); |
b6313243 TT |
2235 | return thevalue; |
2236 | } | |
2237 | if (replacement) | |
2238 | value = replacement; | |
2239 | } | |
d452c4bc | 2240 | do_cleanups (back_to); |
b6313243 TT |
2241 | } |
2242 | #endif | |
2243 | ||
57e66780 DJ |
2244 | stb = mem_fileopen (); |
2245 | old_chain = make_cleanup_ui_file_delete (stb); | |
2246 | ||
79a45b7d TT |
2247 | get_formatted_print_options (&opts, format_code[(int) format]); |
2248 | opts.deref_ref = 0; | |
b6313243 TT |
2249 | opts.raw = 1; |
2250 | if (thevalue) | |
2251 | { | |
50810684 | 2252 | struct gdbarch *gdbarch = get_type_arch (value_type (value)); |
b6313243 | 2253 | make_cleanup (xfree, thevalue); |
50810684 | 2254 | LA_PRINT_STRING (stb, builtin_type (gdbarch)->builtin_char, |
fbb8f299 | 2255 | thevalue, len, 0, &opts); |
b6313243 TT |
2256 | } |
2257 | else | |
2258 | common_val_print (value, stb, 0, &opts, current_language); | |
85265413 | 2259 | thevalue = ui_file_xstrdup (stb, &dummy); |
57e66780 | 2260 | |
85265413 NR |
2261 | do_cleanups (old_chain); |
2262 | return thevalue; | |
2263 | } | |
2264 | ||
340a7723 NR |
2265 | int |
2266 | varobj_editable_p (struct varobj *var) | |
2267 | { | |
2268 | struct type *type; | |
2269 | struct value *value; | |
2270 | ||
2271 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
2272 | return 0; | |
2273 | ||
2274 | type = get_value_type (var); | |
2275 | ||
2276 | switch (TYPE_CODE (type)) | |
2277 | { | |
2278 | case TYPE_CODE_STRUCT: | |
2279 | case TYPE_CODE_UNION: | |
2280 | case TYPE_CODE_ARRAY: | |
2281 | case TYPE_CODE_FUNC: | |
2282 | case TYPE_CODE_METHOD: | |
2283 | return 0; | |
2284 | break; | |
2285 | ||
2286 | default: | |
2287 | return 1; | |
2288 | break; | |
2289 | } | |
2290 | } | |
2291 | ||
acd65feb VP |
2292 | /* Return non-zero if changes in value of VAR |
2293 | must be detected and reported by -var-update. | |
2294 | Return zero is -var-update should never report | |
2295 | changes of such values. This makes sense for structures | |
2296 | (since the changes in children values will be reported separately), | |
2297 | or for artifical objects (like 'public' pseudo-field in C++). | |
2298 | ||
2299 | Return value of 0 means that gdb need not call value_fetch_lazy | |
2300 | for the value of this variable object. */ | |
8b93c638 | 2301 | static int |
b2c2bd75 | 2302 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
2303 | { |
2304 | int r; | |
2305 | struct type *type; | |
2306 | ||
2307 | if (CPLUS_FAKE_CHILD (var)) | |
2308 | return 0; | |
2309 | ||
6e2a9270 | 2310 | type = get_value_type (var); |
8b93c638 JM |
2311 | |
2312 | switch (TYPE_CODE (type)) | |
2313 | { | |
72330bd6 AC |
2314 | case TYPE_CODE_STRUCT: |
2315 | case TYPE_CODE_UNION: | |
2316 | case TYPE_CODE_ARRAY: | |
2317 | r = 0; | |
2318 | break; | |
8b93c638 | 2319 | |
72330bd6 AC |
2320 | default: |
2321 | r = 1; | |
8b93c638 JM |
2322 | } |
2323 | ||
2324 | return r; | |
2325 | } | |
2326 | ||
5a413362 VP |
2327 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
2328 | selected frame, and not bound to thread/frame. Such variable objects | |
2329 | are created using '@' as frame specifier to -var-create. */ | |
2330 | int | |
2331 | varobj_floating_p (struct varobj *var) | |
2332 | { | |
2333 | return var->root->floating; | |
2334 | } | |
2335 | ||
2024f65a VP |
2336 | /* Given the value and the type of a variable object, |
2337 | adjust the value and type to those necessary | |
2338 | for getting children of the variable object. | |
2339 | This includes dereferencing top-level references | |
2340 | to all types and dereferencing pointers to | |
2341 | structures. | |
2342 | ||
2343 | Both TYPE and *TYPE should be non-null. VALUE | |
2344 | can be null if we want to only translate type. | |
2345 | *VALUE can be null as well -- if the parent | |
02142340 VP |
2346 | value is not known. |
2347 | ||
2348 | If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1 | |
b6313243 | 2349 | depending on whether pointer was dereferenced |
02142340 | 2350 | in this function. */ |
2024f65a VP |
2351 | static void |
2352 | adjust_value_for_child_access (struct value **value, | |
02142340 VP |
2353 | struct type **type, |
2354 | int *was_ptr) | |
2024f65a VP |
2355 | { |
2356 | gdb_assert (type && *type); | |
2357 | ||
02142340 VP |
2358 | if (was_ptr) |
2359 | *was_ptr = 0; | |
2360 | ||
2024f65a VP |
2361 | *type = check_typedef (*type); |
2362 | ||
2363 | /* The type of value stored in varobj, that is passed | |
2364 | to us, is already supposed to be | |
2365 | reference-stripped. */ | |
2366 | ||
2367 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
2368 | ||
2369 | /* Pointers to structures are treated just like | |
2370 | structures when accessing children. Don't | |
2371 | dererences pointers to other types. */ | |
2372 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
2373 | { | |
2374 | struct type *target_type = get_target_type (*type); | |
2375 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
2376 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
2377 | { | |
2378 | if (value && *value) | |
3f4178d6 DJ |
2379 | { |
2380 | int success = gdb_value_ind (*value, value); | |
2381 | if (!success) | |
2382 | *value = NULL; | |
2383 | } | |
2024f65a | 2384 | *type = target_type; |
02142340 VP |
2385 | if (was_ptr) |
2386 | *was_ptr = 1; | |
2024f65a VP |
2387 | } |
2388 | } | |
2389 | ||
2390 | /* The 'get_target_type' function calls check_typedef on | |
2391 | result, so we can immediately check type code. No | |
2392 | need to call check_typedef here. */ | |
2393 | } | |
2394 | ||
8b93c638 JM |
2395 | /* C */ |
2396 | static int | |
fba45db2 | 2397 | c_number_of_children (struct varobj *var) |
8b93c638 | 2398 | { |
2024f65a VP |
2399 | struct type *type = get_value_type (var); |
2400 | int children = 0; | |
8b93c638 | 2401 | struct type *target; |
8b93c638 | 2402 | |
02142340 | 2403 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 | 2404 | target = get_target_type (type); |
8b93c638 JM |
2405 | |
2406 | switch (TYPE_CODE (type)) | |
2407 | { | |
2408 | case TYPE_CODE_ARRAY: | |
2409 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
d78df370 | 2410 | && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
8b93c638 JM |
2411 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
2412 | else | |
74a44383 DJ |
2413 | /* If we don't know how many elements there are, don't display |
2414 | any. */ | |
2415 | children = 0; | |
8b93c638 JM |
2416 | break; |
2417 | ||
2418 | case TYPE_CODE_STRUCT: | |
2419 | case TYPE_CODE_UNION: | |
2420 | children = TYPE_NFIELDS (type); | |
2421 | break; | |
2422 | ||
2423 | case TYPE_CODE_PTR: | |
2024f65a VP |
2424 | /* The type here is a pointer to non-struct. Typically, pointers |
2425 | have one child, except for function ptrs, which have no children, | |
2426 | and except for void*, as we don't know what to show. | |
2427 | ||
0755e6c1 FN |
2428 | We can show char* so we allow it to be dereferenced. If you decide |
2429 | to test for it, please mind that a little magic is necessary to | |
2430 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
2431 | TYPE_NAME == "char" */ | |
2024f65a VP |
2432 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
2433 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
2434 | children = 0; | |
2435 | else | |
2436 | children = 1; | |
8b93c638 JM |
2437 | break; |
2438 | ||
2439 | default: | |
2440 | /* Other types have no children */ | |
2441 | break; | |
2442 | } | |
2443 | ||
2444 | return children; | |
2445 | } | |
2446 | ||
2447 | static char * | |
fba45db2 | 2448 | c_name_of_variable (struct varobj *parent) |
8b93c638 | 2449 | { |
1b36a34b | 2450 | return xstrdup (parent->name); |
8b93c638 JM |
2451 | } |
2452 | ||
bbec2603 VP |
2453 | /* Return the value of element TYPE_INDEX of a structure |
2454 | value VALUE. VALUE's type should be a structure, | |
2455 | or union, or a typedef to struct/union. | |
2456 | ||
2457 | Returns NULL if getting the value fails. Never throws. */ | |
2458 | static struct value * | |
2459 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 2460 | { |
bbec2603 VP |
2461 | struct value *result = NULL; |
2462 | volatile struct gdb_exception e; | |
8b93c638 | 2463 | |
bbec2603 VP |
2464 | struct type *type = value_type (value); |
2465 | type = check_typedef (type); | |
2466 | ||
2467 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2468 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 2469 | |
bbec2603 VP |
2470 | TRY_CATCH (e, RETURN_MASK_ERROR) |
2471 | { | |
d6a843b5 | 2472 | if (field_is_static (&TYPE_FIELD (type, type_index))) |
bbec2603 VP |
2473 | result = value_static_field (type, type_index); |
2474 | else | |
2475 | result = value_primitive_field (value, 0, type_index, type); | |
2476 | } | |
2477 | if (e.reason < 0) | |
2478 | { | |
2479 | return NULL; | |
2480 | } | |
2481 | else | |
2482 | { | |
2483 | return result; | |
2484 | } | |
2485 | } | |
2486 | ||
2487 | /* Obtain the information about child INDEX of the variable | |
2488 | object PARENT. | |
2489 | If CNAME is not null, sets *CNAME to the name of the child relative | |
2490 | to the parent. | |
2491 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
2492 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
2493 | ||
2494 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
2495 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
2496 | to NULL. */ | |
2497 | static void | |
2498 | c_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2499 | char **cname, struct value **cvalue, struct type **ctype, |
2500 | char **cfull_expression) | |
bbec2603 VP |
2501 | { |
2502 | struct value *value = parent->value; | |
2024f65a | 2503 | struct type *type = get_value_type (parent); |
02142340 VP |
2504 | char *parent_expression = NULL; |
2505 | int was_ptr; | |
bbec2603 VP |
2506 | |
2507 | if (cname) | |
2508 | *cname = NULL; | |
2509 | if (cvalue) | |
2510 | *cvalue = NULL; | |
2511 | if (ctype) | |
2512 | *ctype = NULL; | |
02142340 VP |
2513 | if (cfull_expression) |
2514 | { | |
2515 | *cfull_expression = NULL; | |
2516 | parent_expression = varobj_get_path_expr (parent); | |
2517 | } | |
2518 | adjust_value_for_child_access (&value, &type, &was_ptr); | |
bbec2603 | 2519 | |
8b93c638 JM |
2520 | switch (TYPE_CODE (type)) |
2521 | { | |
2522 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
2523 | if (cname) |
2524 | *cname = xstrprintf ("%d", index | |
2525 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2526 | ||
2527 | if (cvalue && value) | |
2528 | { | |
2529 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
2497b498 | 2530 | gdb_value_subscript (value, real_index, cvalue); |
bbec2603 VP |
2531 | } |
2532 | ||
2533 | if (ctype) | |
2534 | *ctype = get_target_type (type); | |
2535 | ||
02142340 VP |
2536 | if (cfull_expression) |
2537 | *cfull_expression = xstrprintf ("(%s)[%d]", parent_expression, | |
2538 | index | |
2539 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2540 | ||
2541 | ||
8b93c638 JM |
2542 | break; |
2543 | ||
2544 | case TYPE_CODE_STRUCT: | |
2545 | case TYPE_CODE_UNION: | |
bbec2603 | 2546 | if (cname) |
1b36a34b | 2547 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); |
bbec2603 VP |
2548 | |
2549 | if (cvalue && value) | |
2550 | { | |
2551 | /* For C, varobj index is the same as type index. */ | |
2552 | *cvalue = value_struct_element_index (value, index); | |
2553 | } | |
2554 | ||
2555 | if (ctype) | |
2556 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2557 | ||
02142340 VP |
2558 | if (cfull_expression) |
2559 | { | |
2560 | char *join = was_ptr ? "->" : "."; | |
2561 | *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, join, | |
2562 | TYPE_FIELD_NAME (type, index)); | |
2563 | } | |
2564 | ||
8b93c638 JM |
2565 | break; |
2566 | ||
2567 | case TYPE_CODE_PTR: | |
bbec2603 VP |
2568 | if (cname) |
2569 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 2570 | |
bbec2603 | 2571 | if (cvalue && value) |
3f4178d6 DJ |
2572 | { |
2573 | int success = gdb_value_ind (value, cvalue); | |
2574 | if (!success) | |
2575 | *cvalue = NULL; | |
2576 | } | |
bbec2603 | 2577 | |
2024f65a VP |
2578 | /* Don't use get_target_type because it calls |
2579 | check_typedef and here, we want to show the true | |
2580 | declared type of the variable. */ | |
bbec2603 | 2581 | if (ctype) |
2024f65a | 2582 | *ctype = TYPE_TARGET_TYPE (type); |
02142340 VP |
2583 | |
2584 | if (cfull_expression) | |
2585 | *cfull_expression = xstrprintf ("*(%s)", parent_expression); | |
bbec2603 | 2586 | |
8b93c638 JM |
2587 | break; |
2588 | ||
2589 | default: | |
2590 | /* This should not happen */ | |
bbec2603 VP |
2591 | if (cname) |
2592 | *cname = xstrdup ("???"); | |
02142340 VP |
2593 | if (cfull_expression) |
2594 | *cfull_expression = xstrdup ("???"); | |
bbec2603 | 2595 | /* Don't set value and type, we don't know then. */ |
8b93c638 | 2596 | } |
bbec2603 | 2597 | } |
8b93c638 | 2598 | |
bbec2603 VP |
2599 | static char * |
2600 | c_name_of_child (struct varobj *parent, int index) | |
2601 | { | |
2602 | char *name; | |
02142340 | 2603 | c_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2604 | return name; |
2605 | } | |
2606 | ||
02142340 VP |
2607 | static char * |
2608 | c_path_expr_of_child (struct varobj *child) | |
2609 | { | |
2610 | c_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2611 | &child->path_expr); | |
2612 | return child->path_expr; | |
2613 | } | |
2614 | ||
c5b48eac VP |
2615 | /* If frame associated with VAR can be found, switch |
2616 | to it and return 1. Otherwise, return 0. */ | |
2617 | static int | |
2618 | check_scope (struct varobj *var) | |
2619 | { | |
2620 | struct frame_info *fi; | |
2621 | int scope; | |
2622 | ||
2623 | fi = frame_find_by_id (var->root->frame); | |
2624 | scope = fi != NULL; | |
2625 | ||
2626 | if (fi) | |
2627 | { | |
2628 | CORE_ADDR pc = get_frame_pc (fi); | |
2629 | if (pc < BLOCK_START (var->root->valid_block) || | |
2630 | pc >= BLOCK_END (var->root->valid_block)) | |
2631 | scope = 0; | |
2632 | else | |
2633 | select_frame (fi); | |
2634 | } | |
2635 | return scope; | |
2636 | } | |
2637 | ||
30b28db1 | 2638 | static struct value * |
fba45db2 | 2639 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 2640 | { |
5e572bb4 | 2641 | struct value *new_val = NULL; |
73a93a32 | 2642 | struct varobj *var = *var_handle; |
8b93c638 | 2643 | struct frame_info *fi; |
c5b48eac | 2644 | int within_scope = 0; |
6208b47d VP |
2645 | struct cleanup *back_to; |
2646 | ||
73a93a32 | 2647 | /* Only root variables can be updated... */ |
b2c2bd75 | 2648 | if (!is_root_p (var)) |
73a93a32 JI |
2649 | /* Not a root var */ |
2650 | return NULL; | |
2651 | ||
4f8d22e3 | 2652 | back_to = make_cleanup_restore_current_thread (); |
72330bd6 | 2653 | |
8b93c638 | 2654 | /* Determine whether the variable is still around. */ |
a5defcdc | 2655 | if (var->root->valid_block == NULL || var->root->floating) |
8b93c638 | 2656 | within_scope = 1; |
c5b48eac VP |
2657 | else if (var->root->thread_id == 0) |
2658 | { | |
2659 | /* The program was single-threaded when the variable object was | |
2660 | created. Technically, it's possible that the program became | |
2661 | multi-threaded since then, but we don't support such | |
2662 | scenario yet. */ | |
2663 | within_scope = check_scope (var); | |
2664 | } | |
8b93c638 JM |
2665 | else |
2666 | { | |
c5b48eac VP |
2667 | ptid_t ptid = thread_id_to_pid (var->root->thread_id); |
2668 | if (in_thread_list (ptid)) | |
d2353924 | 2669 | { |
c5b48eac VP |
2670 | switch_to_thread (ptid); |
2671 | within_scope = check_scope (var); | |
2672 | } | |
8b93c638 | 2673 | } |
72330bd6 | 2674 | |
8b93c638 JM |
2675 | if (within_scope) |
2676 | { | |
73a93a32 | 2677 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
2678 | expression fails we want to just return NULL. */ |
2679 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
2680 | return new_val; |
2681 | } | |
2682 | ||
6208b47d VP |
2683 | do_cleanups (back_to); |
2684 | ||
8b93c638 JM |
2685 | return NULL; |
2686 | } | |
2687 | ||
30b28db1 | 2688 | static struct value * |
fba45db2 | 2689 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2690 | { |
bbec2603 | 2691 | struct value *value = NULL; |
02142340 | 2692 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2693 | |
2694 | return value; | |
2695 | } | |
2696 | ||
2697 | static struct type * | |
fba45db2 | 2698 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2699 | { |
bbec2603 | 2700 | struct type *type = NULL; |
02142340 | 2701 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2702 | return type; |
2703 | } | |
2704 | ||
8b93c638 | 2705 | static char * |
de051565 | 2706 | c_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2707 | { |
14b3d9c9 JB |
2708 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2709 | it will print out its children instead of "{...}". So we need to | |
2710 | catch that case explicitly. */ | |
2711 | struct type *type = get_type (var); | |
e64d9b3d | 2712 | |
b6313243 TT |
2713 | /* If we have a custom formatter, return whatever string it has |
2714 | produced. */ | |
2715 | if (var->pretty_printer && var->print_value) | |
2716 | return xstrdup (var->print_value); | |
2717 | ||
14b3d9c9 JB |
2718 | /* Strip top-level references. */ |
2719 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2720 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2721 | ||
2722 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2723 | { |
2724 | case TYPE_CODE_STRUCT: | |
2725 | case TYPE_CODE_UNION: | |
2726 | return xstrdup ("{...}"); | |
2727 | /* break; */ | |
2728 | ||
2729 | case TYPE_CODE_ARRAY: | |
2730 | { | |
e64d9b3d | 2731 | char *number; |
b435e160 | 2732 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2733 | return (number); |
8b93c638 JM |
2734 | } |
2735 | /* break; */ | |
2736 | ||
2737 | default: | |
2738 | { | |
575bbeb6 KS |
2739 | if (var->value == NULL) |
2740 | { | |
2741 | /* This can happen if we attempt to get the value of a struct | |
2742 | member when the parent is an invalid pointer. This is an | |
2743 | error condition, so we should tell the caller. */ | |
2744 | return NULL; | |
2745 | } | |
2746 | else | |
2747 | { | |
25d5ea92 VP |
2748 | if (var->not_fetched && value_lazy (var->value)) |
2749 | /* Frozen variable and no value yet. We don't | |
2750 | implicitly fetch the value. MI response will | |
2751 | use empty string for the value, which is OK. */ | |
2752 | return NULL; | |
2753 | ||
b2c2bd75 | 2754 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2755 | gdb_assert (!value_lazy (var->value)); |
de051565 MK |
2756 | |
2757 | /* If the specified format is the current one, | |
2758 | we can reuse print_value */ | |
2759 | if (format == var->format) | |
2760 | return xstrdup (var->print_value); | |
2761 | else | |
d452c4bc | 2762 | return value_get_print_value (var->value, format, var); |
85265413 | 2763 | } |
e64d9b3d | 2764 | } |
8b93c638 JM |
2765 | } |
2766 | } | |
2767 | \f | |
2768 | ||
2769 | /* C++ */ | |
2770 | ||
2771 | static int | |
fba45db2 | 2772 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2773 | { |
2774 | struct type *type; | |
2775 | int children, dont_know; | |
2776 | ||
2777 | dont_know = 1; | |
2778 | children = 0; | |
2779 | ||
2780 | if (!CPLUS_FAKE_CHILD (var)) | |
2781 | { | |
2024f65a | 2782 | type = get_value_type (var); |
02142340 | 2783 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2784 | |
2785 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2786 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2787 | { |
2788 | int kids[3]; | |
2789 | ||
2790 | cplus_class_num_children (type, kids); | |
2791 | if (kids[v_public] != 0) | |
2792 | children++; | |
2793 | if (kids[v_private] != 0) | |
2794 | children++; | |
2795 | if (kids[v_protected] != 0) | |
2796 | children++; | |
2797 | ||
2798 | /* Add any baseclasses */ | |
2799 | children += TYPE_N_BASECLASSES (type); | |
2800 | dont_know = 0; | |
2801 | ||
2802 | /* FIXME: save children in var */ | |
2803 | } | |
2804 | } | |
2805 | else | |
2806 | { | |
2807 | int kids[3]; | |
2808 | ||
2024f65a | 2809 | type = get_value_type (var->parent); |
02142340 | 2810 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2811 | |
2812 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2813 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2814 | children = kids[v_public]; |
6e382aa3 | 2815 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2816 | children = kids[v_private]; |
2817 | else | |
2818 | children = kids[v_protected]; | |
2819 | dont_know = 0; | |
2820 | } | |
2821 | ||
2822 | if (dont_know) | |
2823 | children = c_number_of_children (var); | |
2824 | ||
2825 | return children; | |
2826 | } | |
2827 | ||
2828 | /* Compute # of public, private, and protected variables in this class. | |
2829 | That means we need to descend into all baseclasses and find out | |
2830 | how many are there, too. */ | |
2831 | static void | |
1669605f | 2832 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2833 | { |
2834 | int i; | |
2835 | ||
2836 | children[v_public] = 0; | |
2837 | children[v_private] = 0; | |
2838 | children[v_protected] = 0; | |
2839 | ||
2840 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2841 | { | |
2842 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2843 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2844 | continue; |
2845 | ||
2846 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2847 | children[v_protected]++; | |
2848 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2849 | children[v_private]++; | |
2850 | else | |
2851 | children[v_public]++; | |
2852 | } | |
2853 | } | |
2854 | ||
2855 | static char * | |
fba45db2 | 2856 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2857 | { |
2858 | return c_name_of_variable (parent); | |
2859 | } | |
2860 | ||
2024f65a VP |
2861 | enum accessibility { private_field, protected_field, public_field }; |
2862 | ||
2863 | /* Check if field INDEX of TYPE has the specified accessibility. | |
2864 | Return 0 if so and 1 otherwise. */ | |
2865 | static int | |
2866 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 2867 | { |
2024f65a VP |
2868 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
2869 | return 1; | |
2870 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
2871 | return 1; | |
2872 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
2873 | && !TYPE_FIELD_PROTECTED (type, index)) | |
2874 | return 1; | |
2875 | else | |
2876 | return 0; | |
2877 | } | |
2878 | ||
2879 | static void | |
2880 | cplus_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2881 | char **cname, struct value **cvalue, struct type **ctype, |
2882 | char **cfull_expression) | |
2024f65a | 2883 | { |
348144ba | 2884 | char *name = NULL; |
2024f65a | 2885 | struct value *value; |
8b93c638 | 2886 | struct type *type; |
02142340 VP |
2887 | int was_ptr; |
2888 | char *parent_expression = NULL; | |
8b93c638 | 2889 | |
2024f65a VP |
2890 | if (cname) |
2891 | *cname = NULL; | |
2892 | if (cvalue) | |
2893 | *cvalue = NULL; | |
2894 | if (ctype) | |
2895 | *ctype = NULL; | |
02142340 VP |
2896 | if (cfull_expression) |
2897 | *cfull_expression = NULL; | |
2024f65a | 2898 | |
8b93c638 JM |
2899 | if (CPLUS_FAKE_CHILD (parent)) |
2900 | { | |
2024f65a VP |
2901 | value = parent->parent->value; |
2902 | type = get_value_type (parent->parent); | |
02142340 VP |
2903 | if (cfull_expression) |
2904 | parent_expression = varobj_get_path_expr (parent->parent); | |
8b93c638 JM |
2905 | } |
2906 | else | |
2024f65a VP |
2907 | { |
2908 | value = parent->value; | |
2909 | type = get_value_type (parent); | |
02142340 VP |
2910 | if (cfull_expression) |
2911 | parent_expression = varobj_get_path_expr (parent); | |
2024f65a | 2912 | } |
8b93c638 | 2913 | |
02142340 | 2914 | adjust_value_for_child_access (&value, &type, &was_ptr); |
2024f65a VP |
2915 | |
2916 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
3f4178d6 | 2917 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
8b93c638 | 2918 | { |
02142340 | 2919 | char *join = was_ptr ? "->" : "."; |
8b93c638 JM |
2920 | if (CPLUS_FAKE_CHILD (parent)) |
2921 | { | |
6e382aa3 JJ |
2922 | /* The fields of the class type are ordered as they |
2923 | appear in the class. We are given an index for a | |
2924 | particular access control type ("public","protected", | |
2925 | or "private"). We must skip over fields that don't | |
2926 | have the access control we are looking for to properly | |
2927 | find the indexed field. */ | |
2928 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 2929 | enum accessibility acc = public_field; |
6e382aa3 | 2930 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 2931 | acc = private_field; |
6e382aa3 | 2932 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
2933 | acc = protected_field; |
2934 | ||
2935 | while (index >= 0) | |
6e382aa3 | 2936 | { |
2024f65a VP |
2937 | if (TYPE_VPTR_BASETYPE (type) == type |
2938 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2939 | ; /* ignore vptr */ | |
2940 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
2941 | --index; |
2942 | ++type_index; | |
6e382aa3 | 2943 | } |
2024f65a VP |
2944 | --type_index; |
2945 | ||
2946 | if (cname) | |
2947 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
2948 | ||
2949 | if (cvalue && value) | |
2950 | *cvalue = value_struct_element_index (value, type_index); | |
2951 | ||
2952 | if (ctype) | |
2953 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
02142340 VP |
2954 | |
2955 | if (cfull_expression) | |
2956 | *cfull_expression = xstrprintf ("((%s)%s%s)", parent_expression, | |
2957 | join, | |
2958 | TYPE_FIELD_NAME (type, type_index)); | |
2024f65a VP |
2959 | } |
2960 | else if (index < TYPE_N_BASECLASSES (type)) | |
2961 | { | |
2962 | /* This is a baseclass. */ | |
2963 | if (cname) | |
2964 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
2965 | ||
2966 | if (cvalue && value) | |
6e382aa3 | 2967 | { |
2024f65a | 2968 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
02142340 | 2969 | release_value (*cvalue); |
6e382aa3 JJ |
2970 | } |
2971 | ||
2024f65a VP |
2972 | if (ctype) |
2973 | { | |
2974 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2975 | } | |
02142340 VP |
2976 | |
2977 | if (cfull_expression) | |
2978 | { | |
2979 | char *ptr = was_ptr ? "*" : ""; | |
2980 | /* Cast the parent to the base' type. Note that in gdb, | |
2981 | expression like | |
2982 | (Base1)d | |
2983 | will create an lvalue, for all appearences, so we don't | |
2984 | need to use more fancy: | |
2985 | *(Base1*)(&d) | |
2986 | construct. */ | |
2987 | *cfull_expression = xstrprintf ("(%s(%s%s) %s)", | |
2988 | ptr, | |
2989 | TYPE_FIELD_NAME (type, index), | |
2990 | ptr, | |
2991 | parent_expression); | |
2992 | } | |
8b93c638 | 2993 | } |
8b93c638 JM |
2994 | else |
2995 | { | |
348144ba | 2996 | char *access = NULL; |
6e382aa3 | 2997 | int children[3]; |
2024f65a | 2998 | cplus_class_num_children (type, children); |
6e382aa3 | 2999 | |
8b93c638 | 3000 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
3001 | only be "public", "private", or "protected" |
3002 | ||
3003 | The special "fake" children are always output by varobj in | |
3004 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
3005 | index -= TYPE_N_BASECLASSES (type); |
3006 | switch (index) | |
3007 | { | |
3008 | case 0: | |
6e382aa3 | 3009 | if (children[v_public] > 0) |
2024f65a | 3010 | access = "public"; |
6e382aa3 | 3011 | else if (children[v_private] > 0) |
2024f65a | 3012 | access = "private"; |
6e382aa3 | 3013 | else |
2024f65a | 3014 | access = "protected"; |
6e382aa3 | 3015 | break; |
8b93c638 | 3016 | case 1: |
6e382aa3 | 3017 | if (children[v_public] > 0) |
8b93c638 | 3018 | { |
6e382aa3 | 3019 | if (children[v_private] > 0) |
2024f65a | 3020 | access = "private"; |
6e382aa3 | 3021 | else |
2024f65a | 3022 | access = "protected"; |
8b93c638 | 3023 | } |
6e382aa3 | 3024 | else if (children[v_private] > 0) |
2024f65a | 3025 | access = "protected"; |
6e382aa3 | 3026 | break; |
8b93c638 | 3027 | case 2: |
6e382aa3 | 3028 | /* Must be protected */ |
2024f65a | 3029 | access = "protected"; |
6e382aa3 | 3030 | break; |
8b93c638 JM |
3031 | default: |
3032 | /* error! */ | |
3033 | break; | |
3034 | } | |
348144ba MS |
3035 | |
3036 | gdb_assert (access); | |
2024f65a VP |
3037 | if (cname) |
3038 | *cname = xstrdup (access); | |
8b93c638 | 3039 | |
02142340 | 3040 | /* Value and type and full expression are null here. */ |
2024f65a | 3041 | } |
8b93c638 | 3042 | } |
8b93c638 JM |
3043 | else |
3044 | { | |
02142340 | 3045 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
2024f65a VP |
3046 | } |
3047 | } | |
8b93c638 | 3048 | |
2024f65a VP |
3049 | static char * |
3050 | cplus_name_of_child (struct varobj *parent, int index) | |
3051 | { | |
3052 | char *name = NULL; | |
02142340 | 3053 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
3054 | return name; |
3055 | } | |
3056 | ||
02142340 VP |
3057 | static char * |
3058 | cplus_path_expr_of_child (struct varobj *child) | |
3059 | { | |
3060 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
3061 | &child->path_expr); | |
3062 | return child->path_expr; | |
3063 | } | |
3064 | ||
30b28db1 | 3065 | static struct value * |
fba45db2 | 3066 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 3067 | { |
73a93a32 | 3068 | return c_value_of_root (var_handle); |
8b93c638 JM |
3069 | } |
3070 | ||
30b28db1 | 3071 | static struct value * |
fba45db2 | 3072 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 3073 | { |
2024f65a | 3074 | struct value *value = NULL; |
02142340 | 3075 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
3076 | return value; |
3077 | } | |
3078 | ||
3079 | static struct type * | |
fba45db2 | 3080 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 3081 | { |
2024f65a | 3082 | struct type *type = NULL; |
02142340 | 3083 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
3084 | return type; |
3085 | } | |
3086 | ||
8b93c638 | 3087 | static char * |
de051565 | 3088 | cplus_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 JM |
3089 | { |
3090 | ||
3091 | /* If we have one of our special types, don't print out | |
3092 | any value. */ | |
3093 | if (CPLUS_FAKE_CHILD (var)) | |
3094 | return xstrdup (""); | |
3095 | ||
de051565 | 3096 | return c_value_of_variable (var, format); |
8b93c638 JM |
3097 | } |
3098 | \f | |
3099 | /* Java */ | |
3100 | ||
3101 | static int | |
fba45db2 | 3102 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
3103 | { |
3104 | return cplus_number_of_children (var); | |
3105 | } | |
3106 | ||
3107 | static char * | |
fba45db2 | 3108 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
3109 | { |
3110 | char *p, *name; | |
3111 | ||
3112 | name = cplus_name_of_variable (parent); | |
3113 | /* If the name has "-" in it, it is because we | |
3114 | needed to escape periods in the name... */ | |
3115 | p = name; | |
3116 | ||
3117 | while (*p != '\000') | |
3118 | { | |
3119 | if (*p == '-') | |
3120 | *p = '.'; | |
3121 | p++; | |
3122 | } | |
3123 | ||
3124 | return name; | |
3125 | } | |
3126 | ||
3127 | static char * | |
fba45db2 | 3128 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3129 | { |
3130 | char *name, *p; | |
3131 | ||
3132 | name = cplus_name_of_child (parent, index); | |
3133 | /* Escape any periods in the name... */ | |
3134 | p = name; | |
3135 | ||
3136 | while (*p != '\000') | |
3137 | { | |
3138 | if (*p == '.') | |
3139 | *p = '-'; | |
3140 | p++; | |
3141 | } | |
3142 | ||
3143 | return name; | |
3144 | } | |
3145 | ||
02142340 VP |
3146 | static char * |
3147 | java_path_expr_of_child (struct varobj *child) | |
3148 | { | |
3149 | return NULL; | |
3150 | } | |
3151 | ||
30b28db1 | 3152 | static struct value * |
fba45db2 | 3153 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 3154 | { |
73a93a32 | 3155 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
3156 | } |
3157 | ||
30b28db1 | 3158 | static struct value * |
fba45db2 | 3159 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3160 | { |
3161 | return cplus_value_of_child (parent, index); | |
3162 | } | |
3163 | ||
3164 | static struct type * | |
fba45db2 | 3165 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3166 | { |
3167 | return cplus_type_of_child (parent, index); | |
3168 | } | |
3169 | ||
8b93c638 | 3170 | static char * |
de051565 | 3171 | java_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 3172 | { |
de051565 | 3173 | return cplus_value_of_variable (var, format); |
8b93c638 | 3174 | } |
54333c3b JK |
3175 | |
3176 | /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them | |
3177 | with an arbitrary caller supplied DATA pointer. */ | |
3178 | ||
3179 | void | |
3180 | all_root_varobjs (void (*func) (struct varobj *var, void *data), void *data) | |
3181 | { | |
3182 | struct varobj_root *var_root, *var_root_next; | |
3183 | ||
3184 | /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */ | |
3185 | ||
3186 | for (var_root = rootlist; var_root != NULL; var_root = var_root_next) | |
3187 | { | |
3188 | var_root_next = var_root->next; | |
3189 | ||
3190 | (*func) (var_root->rootvar, data); | |
3191 | } | |
3192 | } | |
8b93c638 JM |
3193 | \f |
3194 | extern void _initialize_varobj (void); | |
3195 | void | |
3196 | _initialize_varobj (void) | |
3197 | { | |
3198 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
3199 | ||
3200 | varobj_table = xmalloc (sizeof_table); | |
3201 | memset (varobj_table, 0, sizeof_table); | |
3202 | ||
85c07804 AC |
3203 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
3204 | &varobjdebug, _("\ | |
3205 | Set varobj debugging."), _("\ | |
3206 | Show varobj debugging."), _("\ | |
3207 | When non-zero, varobj debugging is enabled."), | |
3208 | NULL, | |
920d2a44 | 3209 | show_varobjdebug, |
85c07804 | 3210 | &setlist, &showlist); |
8b93c638 | 3211 | } |
8756216b | 3212 | |
54333c3b JK |
3213 | /* Invalidate varobj VAR if it is tied to locals and re-create it if it is |
3214 | defined on globals. It is a helper for varobj_invalidate. */ | |
2dbd25e5 | 3215 | |
54333c3b JK |
3216 | static void |
3217 | varobj_invalidate_iter (struct varobj *var, void *unused) | |
8756216b | 3218 | { |
54333c3b JK |
3219 | /* Floating varobjs are reparsed on each stop, so we don't care if the |
3220 | presently parsed expression refers to something that's gone. */ | |
3221 | if (var->root->floating) | |
3222 | return; | |
8756216b | 3223 | |
54333c3b JK |
3224 | /* global var must be re-evaluated. */ |
3225 | if (var->root->valid_block == NULL) | |
2dbd25e5 | 3226 | { |
54333c3b | 3227 | struct varobj *tmp_var; |
2dbd25e5 | 3228 | |
54333c3b JK |
3229 | /* Try to create a varobj with same expression. If we succeed |
3230 | replace the old varobj, otherwise invalidate it. */ | |
3231 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
3232 | USE_CURRENT_FRAME); | |
3233 | if (tmp_var != NULL) | |
3234 | { | |
3235 | tmp_var->obj_name = xstrdup (var->obj_name); | |
3236 | varobj_delete (var, NULL, 0); | |
3237 | install_variable (tmp_var); | |
2dbd25e5 | 3238 | } |
54333c3b JK |
3239 | else |
3240 | var->root->is_valid = 0; | |
2dbd25e5 | 3241 | } |
54333c3b JK |
3242 | else /* locals must be invalidated. */ |
3243 | var->root->is_valid = 0; | |
3244 | } | |
3245 | ||
3246 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
3247 | are defined on globals. | |
3248 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
3249 | ||
3250 | void | |
3251 | varobj_invalidate (void) | |
3252 | { | |
3253 | all_root_varobjs (varobj_invalidate_iter, NULL); | |
8756216b | 3254 | } |