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 TT |
259 | enum varobj_display_formats format, |
260 | PyObject *value_formatter); | |
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; | |
427 | static int rootcount = 0; /* number of root varobjs in the list */ | |
428 | ||
429 | /* Prime number indicating the number of buckets in the hash table */ | |
430 | /* A prime large enough to avoid too many colisions */ | |
431 | #define VAROBJ_TABLE_SIZE 227 | |
432 | ||
433 | /* Pointer to the varobj hash table (built at run time) */ | |
434 | static struct vlist **varobj_table; | |
435 | ||
8b93c638 JM |
436 | /* Is the variable X one of our "fake" children? */ |
437 | #define CPLUS_FAKE_CHILD(x) \ | |
438 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
439 | \f | |
440 | ||
441 | /* API Implementation */ | |
b2c2bd75 VP |
442 | static int |
443 | is_root_p (struct varobj *var) | |
444 | { | |
445 | return (var->root->rootvar == var); | |
446 | } | |
8b93c638 JM |
447 | |
448 | /* Creates a varobj (not its children) */ | |
449 | ||
7d8547c9 AC |
450 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
451 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
452 | ||
453 | static struct frame_info * | |
454 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
455 | { | |
456 | struct frame_info *frame = NULL; | |
457 | ||
458 | if (frame_addr == (CORE_ADDR) 0) | |
459 | return NULL; | |
460 | ||
9d49bdc2 PA |
461 | for (frame = get_current_frame (); |
462 | frame != NULL; | |
463 | frame = get_prev_frame (frame)) | |
7d8547c9 | 464 | { |
1fac167a UW |
465 | /* The CORE_ADDR we get as argument was parsed from a string GDB |
466 | output as $fp. This output got truncated to gdbarch_addr_bit. | |
467 | Truncate the frame base address in the same manner before | |
468 | comparing it against our argument. */ | |
469 | CORE_ADDR frame_base = get_frame_base_address (frame); | |
470 | int addr_bit = gdbarch_addr_bit (get_frame_arch (frame)); | |
471 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) | |
472 | frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
473 | ||
474 | if (frame_base == frame_addr) | |
7d8547c9 AC |
475 | return frame; |
476 | } | |
9d49bdc2 PA |
477 | |
478 | return NULL; | |
7d8547c9 AC |
479 | } |
480 | ||
8b93c638 JM |
481 | struct varobj * |
482 | varobj_create (char *objname, | |
72330bd6 | 483 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
484 | { |
485 | struct varobj *var; | |
2c67cb8b AC |
486 | struct frame_info *fi; |
487 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
488 | struct block *block; |
489 | struct cleanup *old_chain; | |
490 | ||
491 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
492 | var = new_root_variable (); | |
74b7792f | 493 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
494 | |
495 | if (expression != NULL) | |
496 | { | |
497 | char *p; | |
498 | enum varobj_languages lang; | |
e55dccf0 | 499 | struct value *value = NULL; |
8b93c638 | 500 | |
9d49bdc2 PA |
501 | /* Parse and evaluate the expression, filling in as much of the |
502 | variable's data as possible. */ | |
503 | ||
504 | if (has_stack_frames ()) | |
505 | { | |
506 | /* Allow creator to specify context of variable */ | |
507 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) | |
508 | fi = get_selected_frame (NULL); | |
509 | else | |
510 | /* FIXME: cagney/2002-11-23: This code should be doing a | |
511 | lookup using the frame ID and not just the frame's | |
512 | ``address''. This, of course, means an interface | |
513 | change. However, with out that interface change ISAs, | |
514 | such as the ia64 with its two stacks, won't work. | |
515 | Similar goes for the case where there is a frameless | |
516 | function. */ | |
517 | fi = find_frame_addr_in_frame_chain (frame); | |
518 | } | |
8b93c638 | 519 | else |
9d49bdc2 | 520 | fi = NULL; |
8b93c638 | 521 | |
73a93a32 JI |
522 | /* frame = -2 means always use selected frame */ |
523 | if (type == USE_SELECTED_FRAME) | |
a5defcdc | 524 | var->root->floating = 1; |
73a93a32 | 525 | |
8b93c638 JM |
526 | block = NULL; |
527 | if (fi != NULL) | |
ae767bfb | 528 | block = get_frame_block (fi, 0); |
8b93c638 JM |
529 | |
530 | p = expression; | |
531 | innermost_block = NULL; | |
73a93a32 JI |
532 | /* Wrap the call to parse expression, so we can |
533 | return a sensible error. */ | |
534 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
535 | { | |
536 | return NULL; | |
537 | } | |
8b93c638 JM |
538 | |
539 | /* Don't allow variables to be created for types. */ | |
540 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
541 | { | |
542 | do_cleanups (old_chain); | |
bc8332bb AC |
543 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
544 | " as an expression.\n"); | |
8b93c638 JM |
545 | return NULL; |
546 | } | |
547 | ||
548 | var->format = variable_default_display (var); | |
549 | var->root->valid_block = innermost_block; | |
1b36a34b | 550 | var->name = xstrdup (expression); |
02142340 | 551 | /* For a root var, the name and the expr are the same. */ |
1b36a34b | 552 | var->path_expr = xstrdup (expression); |
8b93c638 JM |
553 | |
554 | /* When the frame is different from the current frame, | |
555 | we must select the appropriate frame before parsing | |
556 | the expression, otherwise the value will not be current. | |
557 | Since select_frame is so benign, just call it for all cases. */ | |
44a67aa7 | 558 | if (innermost_block && fi != NULL) |
8b93c638 | 559 | { |
7a424e99 | 560 | var->root->frame = get_frame_id (fi); |
c5b48eac | 561 | var->root->thread_id = pid_to_thread_id (inferior_ptid); |
206415a3 | 562 | old_fi = get_selected_frame (NULL); |
c5b48eac | 563 | select_frame (fi); |
8b93c638 JM |
564 | } |
565 | ||
340a7723 | 566 | /* We definitely need to catch errors here. |
8b93c638 JM |
567 | If evaluate_expression succeeds we got the value we wanted. |
568 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb | 569 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
e55dccf0 VP |
570 | { |
571 | /* Error getting the value. Try to at least get the | |
572 | right type. */ | |
573 | struct value *type_only_value = evaluate_type (var->root->exp); | |
574 | var->type = value_type (type_only_value); | |
575 | } | |
576 | else | |
577 | var->type = value_type (value); | |
acd65feb | 578 | |
acd65feb | 579 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
580 | |
581 | /* Set language info */ | |
582 | lang = variable_language (var); | |
d5d6fca5 | 583 | var->root->lang = &languages[lang]; |
8b93c638 JM |
584 | |
585 | /* Set ourselves as our root */ | |
586 | var->root->rootvar = var; | |
587 | ||
588 | /* Reset the selected frame */ | |
e21458b2 | 589 | if (old_fi != NULL) |
0f7d239c | 590 | select_frame (old_fi); |
8b93c638 JM |
591 | } |
592 | ||
73a93a32 JI |
593 | /* If the variable object name is null, that means this |
594 | is a temporary variable, so don't install it. */ | |
595 | ||
596 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 | 597 | { |
1b36a34b | 598 | var->obj_name = xstrdup (objname); |
8b93c638 JM |
599 | |
600 | /* If a varobj name is duplicated, the install will fail so | |
601 | we must clenup */ | |
602 | if (!install_variable (var)) | |
603 | { | |
604 | do_cleanups (old_chain); | |
605 | return NULL; | |
606 | } | |
607 | } | |
608 | ||
b6313243 | 609 | install_default_visualizer (var); |
8b93c638 JM |
610 | discard_cleanups (old_chain); |
611 | return var; | |
612 | } | |
613 | ||
614 | /* Generates an unique name that can be used for a varobj */ | |
615 | ||
616 | char * | |
617 | varobj_gen_name (void) | |
618 | { | |
619 | static int id = 0; | |
e64d9b3d | 620 | char *obj_name; |
8b93c638 JM |
621 | |
622 | /* generate a name for this object */ | |
623 | id++; | |
b435e160 | 624 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 625 | |
e64d9b3d | 626 | return obj_name; |
8b93c638 JM |
627 | } |
628 | ||
61d8f275 JK |
629 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
630 | error if OBJNAME cannot be found. */ | |
8b93c638 JM |
631 | |
632 | struct varobj * | |
633 | varobj_get_handle (char *objname) | |
634 | { | |
635 | struct vlist *cv; | |
636 | const char *chp; | |
637 | unsigned int index = 0; | |
638 | unsigned int i = 1; | |
639 | ||
640 | for (chp = objname; *chp; chp++) | |
641 | { | |
642 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
643 | } | |
644 | ||
645 | cv = *(varobj_table + index); | |
646 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
647 | cv = cv->next; | |
648 | ||
649 | if (cv == NULL) | |
8a3fe4f8 | 650 | error (_("Variable object not found")); |
8b93c638 JM |
651 | |
652 | return cv->var; | |
653 | } | |
654 | ||
655 | /* Given the handle, return the name of the object */ | |
656 | ||
657 | char * | |
658 | varobj_get_objname (struct varobj *var) | |
659 | { | |
660 | return var->obj_name; | |
661 | } | |
662 | ||
663 | /* Given the handle, return the expression represented by the object */ | |
664 | ||
665 | char * | |
666 | varobj_get_expression (struct varobj *var) | |
667 | { | |
668 | return name_of_variable (var); | |
669 | } | |
670 | ||
671 | /* Deletes a varobj and all its children if only_children == 0, | |
672 | otherwise deletes only the children; returns a malloc'ed list of all the | |
673 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
674 | ||
675 | int | |
676 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
677 | { | |
678 | int delcount; | |
679 | int mycount; | |
680 | struct cpstack *result = NULL; | |
681 | char **cp; | |
682 | ||
683 | /* Initialize a stack for temporary results */ | |
684 | cppush (&result, NULL); | |
685 | ||
686 | if (only_children) | |
687 | /* Delete only the variable children */ | |
688 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
689 | else | |
690 | /* Delete the variable and all its children */ | |
691 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
692 | ||
693 | /* We may have been asked to return a list of what has been deleted */ | |
694 | if (dellist != NULL) | |
695 | { | |
696 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
697 | ||
698 | cp = *dellist; | |
699 | mycount = delcount; | |
700 | *cp = cppop (&result); | |
701 | while ((*cp != NULL) && (mycount > 0)) | |
702 | { | |
703 | mycount--; | |
704 | cp++; | |
705 | *cp = cppop (&result); | |
706 | } | |
707 | ||
708 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 709 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 710 | mycount); |
8b93c638 JM |
711 | } |
712 | ||
713 | return delcount; | |
714 | } | |
715 | ||
b6313243 TT |
716 | /* Convenience function for varobj_set_visualizer. Instantiate a |
717 | pretty-printer for a given value. */ | |
718 | static PyObject * | |
719 | instantiate_pretty_printer (PyObject *constructor, struct value *value) | |
720 | { | |
721 | #if HAVE_PYTHON | |
722 | PyObject *val_obj = NULL; | |
723 | PyObject *printer; | |
724 | volatile struct gdb_exception except; | |
725 | ||
726 | TRY_CATCH (except, RETURN_MASK_ALL) | |
727 | { | |
728 | value = value_copy (value); | |
729 | } | |
730 | GDB_PY_HANDLE_EXCEPTION (except); | |
731 | val_obj = value_to_value_object (value); | |
732 | ||
733 | if (! val_obj) | |
734 | return NULL; | |
735 | ||
736 | printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL); | |
737 | Py_DECREF (val_obj); | |
738 | return printer; | |
739 | #endif | |
740 | return NULL; | |
741 | } | |
742 | ||
8b93c638 JM |
743 | /* Set/Get variable object display format */ |
744 | ||
745 | enum varobj_display_formats | |
746 | varobj_set_display_format (struct varobj *var, | |
747 | enum varobj_display_formats format) | |
748 | { | |
749 | switch (format) | |
750 | { | |
751 | case FORMAT_NATURAL: | |
752 | case FORMAT_BINARY: | |
753 | case FORMAT_DECIMAL: | |
754 | case FORMAT_HEXADECIMAL: | |
755 | case FORMAT_OCTAL: | |
756 | var->format = format; | |
757 | break; | |
758 | ||
759 | default: | |
760 | var->format = variable_default_display (var); | |
761 | } | |
762 | ||
ae7d22a6 VP |
763 | if (varobj_value_is_changeable_p (var) |
764 | && var->value && !value_lazy (var->value)) | |
765 | { | |
6c761d9c | 766 | xfree (var->print_value); |
b6313243 TT |
767 | var->print_value = value_get_print_value (var->value, var->format, |
768 | var->pretty_printer); | |
ae7d22a6 VP |
769 | } |
770 | ||
8b93c638 JM |
771 | return var->format; |
772 | } | |
773 | ||
774 | enum varobj_display_formats | |
775 | varobj_get_display_format (struct varobj *var) | |
776 | { | |
777 | return var->format; | |
778 | } | |
779 | ||
b6313243 TT |
780 | char * |
781 | varobj_get_display_hint (struct varobj *var) | |
782 | { | |
783 | char *result = NULL; | |
784 | ||
785 | #if HAVE_PYTHON | |
786 | PyGILState_STATE state = PyGILState_Ensure (); | |
787 | if (var->pretty_printer) | |
788 | result = gdbpy_get_display_hint (var->pretty_printer); | |
789 | PyGILState_Release (state); | |
790 | #endif | |
791 | ||
792 | return result; | |
793 | } | |
794 | ||
c5b48eac VP |
795 | /* If the variable object is bound to a specific thread, that |
796 | is its evaluation can always be done in context of a frame | |
797 | inside that thread, returns GDB id of the thread -- which | |
798 | is always positive. Otherwise, returns -1. */ | |
799 | int | |
800 | varobj_get_thread_id (struct varobj *var) | |
801 | { | |
802 | if (var->root->valid_block && var->root->thread_id > 0) | |
803 | return var->root->thread_id; | |
804 | else | |
805 | return -1; | |
806 | } | |
807 | ||
25d5ea92 VP |
808 | void |
809 | varobj_set_frozen (struct varobj *var, int frozen) | |
810 | { | |
811 | /* When a variable is unfrozen, we don't fetch its value. | |
812 | The 'not_fetched' flag remains set, so next -var-update | |
813 | won't complain. | |
814 | ||
815 | We don't fetch the value, because for structures the client | |
816 | should do -var-update anyway. It would be bad to have different | |
817 | client-size logic for structure and other types. */ | |
818 | var->frozen = frozen; | |
819 | } | |
820 | ||
821 | int | |
822 | varobj_get_frozen (struct varobj *var) | |
823 | { | |
824 | return var->frozen; | |
825 | } | |
826 | ||
b6313243 TT |
827 | static int |
828 | update_dynamic_varobj_children (struct varobj *var, | |
829 | VEC (varobj_p) **changed, | |
830 | VEC (varobj_p) **new_and_unchanged, | |
831 | int *cchanged) | |
832 | ||
833 | { | |
834 | #if HAVE_PYTHON | |
835 | /* FIXME: we *might* want to provide this functionality as | |
836 | a standalone function, so that other interested parties | |
837 | than varobj code can benefit for this. */ | |
838 | struct cleanup *back_to; | |
839 | PyObject *children; | |
840 | PyObject *iterator; | |
841 | int i; | |
842 | int children_changed = 0; | |
843 | PyObject *printer = var->pretty_printer; | |
844 | PyGILState_STATE state; | |
845 | ||
846 | state = PyGILState_Ensure (); | |
847 | back_to = make_cleanup_py_restore_gil (&state); | |
848 | ||
849 | *cchanged = 0; | |
850 | if (!PyObject_HasAttr (printer, gdbpy_children_cst)) | |
851 | { | |
852 | do_cleanups (back_to); | |
853 | return 0; | |
854 | } | |
855 | ||
856 | children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst, | |
857 | NULL); | |
858 | ||
859 | if (!children) | |
860 | { | |
861 | gdbpy_print_stack (); | |
da1f2771 | 862 | error (_("Null value returned for children")); |
b6313243 TT |
863 | } |
864 | ||
865 | make_cleanup_py_decref (children); | |
866 | ||
867 | if (!PyIter_Check (children)) | |
da1f2771 | 868 | error (_("Returned value is not iterable")); |
b6313243 TT |
869 | |
870 | iterator = PyObject_GetIter (children); | |
871 | if (!iterator) | |
872 | { | |
873 | gdbpy_print_stack (); | |
da1f2771 | 874 | error (_("Could not get children iterator")); |
b6313243 TT |
875 | } |
876 | make_cleanup_py_decref (iterator); | |
877 | ||
878 | for (i = 0; ; ++i) | |
879 | { | |
880 | PyObject *item = PyIter_Next (iterator); | |
881 | PyObject *py_v; | |
882 | struct value *v; | |
883 | char *name; | |
884 | struct cleanup *inner; | |
885 | ||
886 | if (!item) | |
887 | break; | |
888 | inner = make_cleanup_py_decref (item); | |
889 | ||
890 | if (!PyArg_ParseTuple (item, "sO", &name, &py_v)) | |
da1f2771 | 891 | error (_("Invalid item from the child list")); |
b6313243 TT |
892 | |
893 | if (PyObject_TypeCheck (py_v, &value_object_type)) | |
894 | { | |
895 | /* If we just call convert_value_from_python for this type, | |
896 | we won't know who owns the result. For this one case we | |
897 | need to copy the resulting value. */ | |
898 | v = value_object_to_value (py_v); | |
899 | v = value_copy (v); | |
900 | } | |
901 | else | |
902 | v = convert_value_from_python (py_v); | |
903 | ||
904 | /* TODO: This assume the name of the i-th child never changes. */ | |
905 | ||
906 | /* Now see what to do here. */ | |
907 | if (VEC_length (varobj_p, var->children) < i + 1) | |
908 | { | |
909 | /* There's no child yet. */ | |
910 | struct varobj *child = varobj_add_child (var, name, v); | |
911 | if (new_and_unchanged) | |
912 | VEC_safe_push (varobj_p, *new_and_unchanged, child); | |
913 | children_changed = 1; | |
914 | } | |
915 | else | |
916 | { | |
917 | varobj_p existing = VEC_index (varobj_p, var->children, i); | |
918 | if (install_new_value (existing, v, 0) && changed) | |
919 | { | |
920 | if (changed) | |
921 | VEC_safe_push (varobj_p, *changed, existing); | |
922 | } | |
923 | else | |
924 | { | |
925 | if (new_and_unchanged) | |
926 | VEC_safe_push (varobj_p, *new_and_unchanged, existing); | |
927 | } | |
928 | } | |
929 | ||
930 | do_cleanups (inner); | |
931 | } | |
932 | ||
933 | if (i < VEC_length (varobj_p, var->children)) | |
934 | { | |
935 | int i; | |
936 | children_changed = 1; | |
937 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) | |
938 | varobj_delete (VEC_index (varobj_p, var->children, i), NULL, 0); | |
939 | } | |
940 | VEC_truncate (varobj_p, var->children, i); | |
941 | var->num_children = VEC_length (varobj_p, var->children); | |
942 | ||
943 | do_cleanups (back_to); | |
944 | ||
945 | *cchanged = children_changed; | |
946 | return 1; | |
947 | #else | |
948 | gdb_assert (0 && "should never be called if Python is not enabled"); | |
949 | #endif | |
950 | } | |
25d5ea92 | 951 | |
8b93c638 JM |
952 | int |
953 | varobj_get_num_children (struct varobj *var) | |
954 | { | |
955 | if (var->num_children == -1) | |
b6313243 TT |
956 | { |
957 | int changed; | |
958 | if (!var->pretty_printer | |
959 | || !update_dynamic_varobj_children (var, NULL, NULL, &changed)) | |
960 | var->num_children = number_of_children (var); | |
961 | } | |
8b93c638 JM |
962 | |
963 | return var->num_children; | |
964 | } | |
965 | ||
966 | /* Creates a list of the immediate children of a variable object; | |
967 | the return code is the number of such children or -1 on error */ | |
968 | ||
d56d46f5 VP |
969 | VEC (varobj_p)* |
970 | varobj_list_children (struct varobj *var) | |
8b93c638 JM |
971 | { |
972 | struct varobj *child; | |
973 | char *name; | |
b6313243 TT |
974 | int i, children_changed; |
975 | ||
976 | var->children_requested = 1; | |
977 | ||
978 | if (var->pretty_printer | |
979 | /* This, in theory, can result in the number of children changing without | |
980 | frontend noticing. But well, calling -var-list-children on the same | |
981 | varobj twice is not something a sane frontend would do. */ | |
982 | && update_dynamic_varobj_children (var, NULL, NULL, &children_changed)) | |
983 | return var->children; | |
8b93c638 | 984 | |
8b93c638 JM |
985 | if (var->num_children == -1) |
986 | var->num_children = number_of_children (var); | |
987 | ||
74a44383 DJ |
988 | /* If that failed, give up. */ |
989 | if (var->num_children == -1) | |
d56d46f5 | 990 | return var->children; |
74a44383 | 991 | |
28335dcc VP |
992 | /* If we're called when the list of children is not yet initialized, |
993 | allocate enough elements in it. */ | |
994 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
995 | VEC_safe_push (varobj_p, var->children, NULL); | |
996 | ||
8b93c638 JM |
997 | for (i = 0; i < var->num_children; i++) |
998 | { | |
d56d46f5 | 999 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
1000 | |
1001 | if (existing == NULL) | |
1002 | { | |
1003 | /* Either it's the first call to varobj_list_children for | |
1004 | this variable object, and the child was never created, | |
1005 | or it was explicitly deleted by the client. */ | |
1006 | name = name_of_child (var, i); | |
1007 | existing = create_child (var, i, name); | |
1008 | VEC_replace (varobj_p, var->children, i, existing); | |
b6313243 | 1009 | install_default_visualizer (existing); |
28335dcc | 1010 | } |
8b93c638 JM |
1011 | } |
1012 | ||
d56d46f5 | 1013 | return var->children; |
8b93c638 JM |
1014 | } |
1015 | ||
b6313243 TT |
1016 | static struct varobj * |
1017 | varobj_add_child (struct varobj *var, const char *name, struct value *value) | |
1018 | { | |
1019 | varobj_p v = create_child_with_value (var, | |
1020 | VEC_length (varobj_p, var->children), | |
1021 | name, value); | |
1022 | VEC_safe_push (varobj_p, var->children, v); | |
1023 | install_default_visualizer (v); | |
1024 | return v; | |
1025 | } | |
1026 | ||
8b93c638 JM |
1027 | /* Obtain the type of an object Variable as a string similar to the one gdb |
1028 | prints on the console */ | |
1029 | ||
1030 | char * | |
1031 | varobj_get_type (struct varobj *var) | |
1032 | { | |
30b28db1 | 1033 | struct value *val; |
8b93c638 JM |
1034 | struct cleanup *old_chain; |
1035 | struct ui_file *stb; | |
1036 | char *thetype; | |
1037 | long length; | |
1038 | ||
1039 | /* For the "fake" variables, do not return a type. (It's type is | |
8756216b DP |
1040 | NULL, too.) |
1041 | Do not return a type for invalid variables as well. */ | |
1042 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
1043 | return NULL; |
1044 | ||
1045 | stb = mem_fileopen (); | |
1046 | old_chain = make_cleanup_ui_file_delete (stb); | |
1047 | ||
30b28db1 | 1048 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
1049 | cast it to our type. We then typeprint this variable. */ |
1050 | val = value_zero (var->type, not_lval); | |
df407dfe | 1051 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
1052 | |
1053 | thetype = ui_file_xstrdup (stb, &length); | |
1054 | do_cleanups (old_chain); | |
1055 | return thetype; | |
1056 | } | |
1057 | ||
1ecb4ee0 DJ |
1058 | /* Obtain the type of an object variable. */ |
1059 | ||
1060 | struct type * | |
1061 | varobj_get_gdb_type (struct varobj *var) | |
1062 | { | |
1063 | return var->type; | |
1064 | } | |
1065 | ||
02142340 VP |
1066 | /* Return a pointer to the full rooted expression of varobj VAR. |
1067 | If it has not been computed yet, compute it. */ | |
1068 | char * | |
1069 | varobj_get_path_expr (struct varobj *var) | |
1070 | { | |
1071 | if (var->path_expr != NULL) | |
1072 | return var->path_expr; | |
1073 | else | |
1074 | { | |
1075 | /* For root varobjs, we initialize path_expr | |
1076 | when creating varobj, so here it should be | |
1077 | child varobj. */ | |
1078 | gdb_assert (!is_root_p (var)); | |
1079 | return (*var->root->lang->path_expr_of_child) (var); | |
1080 | } | |
1081 | } | |
1082 | ||
8b93c638 JM |
1083 | enum varobj_languages |
1084 | varobj_get_language (struct varobj *var) | |
1085 | { | |
1086 | return variable_language (var); | |
1087 | } | |
1088 | ||
1089 | int | |
1090 | varobj_get_attributes (struct varobj *var) | |
1091 | { | |
1092 | int attributes = 0; | |
1093 | ||
340a7723 | 1094 | if (varobj_editable_p (var)) |
8b93c638 JM |
1095 | /* FIXME: define masks for attributes */ |
1096 | attributes |= 0x00000001; /* Editable */ | |
1097 | ||
1098 | return attributes; | |
1099 | } | |
1100 | ||
de051565 MK |
1101 | char * |
1102 | varobj_get_formatted_value (struct varobj *var, | |
1103 | enum varobj_display_formats format) | |
1104 | { | |
1105 | return my_value_of_variable (var, format); | |
1106 | } | |
1107 | ||
8b93c638 JM |
1108 | char * |
1109 | varobj_get_value (struct varobj *var) | |
1110 | { | |
de051565 | 1111 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
1112 | } |
1113 | ||
1114 | /* Set the value of an object variable (if it is editable) to the | |
1115 | value of the given expression */ | |
1116 | /* Note: Invokes functions that can call error() */ | |
1117 | ||
1118 | int | |
1119 | varobj_set_value (struct varobj *var, char *expression) | |
1120 | { | |
30b28db1 | 1121 | struct value *val; |
8b93c638 | 1122 | int offset = 0; |
a6c442d8 | 1123 | int error = 0; |
8b93c638 JM |
1124 | |
1125 | /* The argument "expression" contains the variable's new value. | |
1126 | We need to first construct a legal expression for this -- ugh! */ | |
1127 | /* Does this cover all the bases? */ | |
1128 | struct expression *exp; | |
30b28db1 | 1129 | struct value *value; |
8b93c638 | 1130 | int saved_input_radix = input_radix; |
340a7723 NR |
1131 | char *s = expression; |
1132 | int i; | |
8b93c638 | 1133 | |
340a7723 | 1134 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 1135 | |
340a7723 NR |
1136 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ |
1137 | exp = parse_exp_1 (&s, 0, 0); | |
1138 | if (!gdb_evaluate_expression (exp, &value)) | |
1139 | { | |
1140 | /* We cannot proceed without a valid expression. */ | |
1141 | xfree (exp); | |
1142 | return 0; | |
8b93c638 JM |
1143 | } |
1144 | ||
340a7723 NR |
1145 | /* All types that are editable must also be changeable. */ |
1146 | gdb_assert (varobj_value_is_changeable_p (var)); | |
1147 | ||
1148 | /* The value of a changeable variable object must not be lazy. */ | |
1149 | gdb_assert (!value_lazy (var->value)); | |
1150 | ||
1151 | /* Need to coerce the input. We want to check if the | |
1152 | value of the variable object will be different | |
1153 | after assignment, and the first thing value_assign | |
1154 | does is coerce the input. | |
1155 | For example, if we are assigning an array to a pointer variable we | |
1156 | should compare the pointer with the the array's address, not with the | |
1157 | array's content. */ | |
1158 | value = coerce_array (value); | |
1159 | ||
1160 | /* The new value may be lazy. gdb_value_assign, or | |
1161 | rather value_contents, will take care of this. | |
1162 | If fetching of the new value will fail, gdb_value_assign | |
1163 | with catch the exception. */ | |
1164 | if (!gdb_value_assign (var->value, value, &val)) | |
1165 | return 0; | |
1166 | ||
1167 | /* If the value has changed, record it, so that next -var-update can | |
1168 | report this change. If a variable had a value of '1', we've set it | |
1169 | to '333' and then set again to '1', when -var-update will report this | |
1170 | variable as changed -- because the first assignment has set the | |
1171 | 'updated' flag. There's no need to optimize that, because return value | |
1172 | of -var-update should be considered an approximation. */ | |
1173 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
1174 | input_radix = saved_input_radix; | |
1175 | return 1; | |
8b93c638 JM |
1176 | } |
1177 | ||
1178 | /* Returns a malloc'ed list with all root variable objects */ | |
1179 | int | |
1180 | varobj_list (struct varobj ***varlist) | |
1181 | { | |
1182 | struct varobj **cv; | |
1183 | struct varobj_root *croot; | |
1184 | int mycount = rootcount; | |
1185 | ||
1186 | /* Alloc (rootcount + 1) entries for the result */ | |
1187 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
1188 | ||
1189 | cv = *varlist; | |
1190 | croot = rootlist; | |
1191 | while ((croot != NULL) && (mycount > 0)) | |
1192 | { | |
1193 | *cv = croot->rootvar; | |
1194 | mycount--; | |
1195 | cv++; | |
1196 | croot = croot->next; | |
1197 | } | |
1198 | /* Mark the end of the list */ | |
1199 | *cv = NULL; | |
1200 | ||
1201 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
1202 | warning |
1203 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
1204 | rootcount, mycount); | |
8b93c638 JM |
1205 | |
1206 | return rootcount; | |
1207 | } | |
1208 | ||
acd65feb VP |
1209 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
1210 | this is the first assignement after the variable object was just | |
1211 | created, or changed type. In that case, just assign the value | |
1212 | and return 0. | |
ee342b23 VP |
1213 | Otherwise, assign the new value, and return 1 if the value is different |
1214 | from the current one, 0 otherwise. The comparison is done on textual | |
1215 | representation of value. Therefore, some types need not be compared. E.g. | |
1216 | for structures the reported value is always "{...}", so no comparison is | |
1217 | necessary here. If the old value was NULL and new one is not, or vice versa, | |
1218 | we always return 1. | |
b26ed50d VP |
1219 | |
1220 | The VALUE parameter should not be released -- the function will | |
1221 | take care of releasing it when needed. */ | |
acd65feb VP |
1222 | static int |
1223 | install_new_value (struct varobj *var, struct value *value, int initial) | |
1224 | { | |
1225 | int changeable; | |
1226 | int need_to_fetch; | |
1227 | int changed = 0; | |
25d5ea92 | 1228 | int intentionally_not_fetched = 0; |
7a4d50bf | 1229 | char *print_value = NULL; |
acd65feb | 1230 | |
acd65feb VP |
1231 | /* We need to know the varobj's type to decide if the value should |
1232 | be fetched or not. C++ fake children (public/protected/private) don't have | |
1233 | a type. */ | |
1234 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 1235 | changeable = varobj_value_is_changeable_p (var); |
b6313243 TT |
1236 | |
1237 | /* If the type has custom visualizer, we consider it to be always | |
1238 | changeable. FIXME: need to make sure this behaviour will not | |
1239 | mess up read-sensitive values. */ | |
1240 | if (var->pretty_printer) | |
1241 | changeable = 1; | |
1242 | ||
acd65feb VP |
1243 | need_to_fetch = changeable; |
1244 | ||
b26ed50d VP |
1245 | /* We are not interested in the address of references, and given |
1246 | that in C++ a reference is not rebindable, it cannot | |
1247 | meaningfully change. So, get hold of the real value. */ | |
1248 | if (value) | |
1249 | { | |
1250 | value = coerce_ref (value); | |
1251 | release_value (value); | |
1252 | } | |
1253 | ||
acd65feb VP |
1254 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1255 | /* For unions, we need to fetch the value implicitly because | |
1256 | of implementation of union member fetch. When gdb | |
1257 | creates a value for a field and the value of the enclosing | |
1258 | structure is not lazy, it immediately copies the necessary | |
1259 | bytes from the enclosing values. If the enclosing value is | |
1260 | lazy, the call to value_fetch_lazy on the field will read | |
1261 | the data from memory. For unions, that means we'll read the | |
1262 | same memory more than once, which is not desirable. So | |
1263 | fetch now. */ | |
1264 | need_to_fetch = 1; | |
1265 | ||
1266 | /* The new value might be lazy. If the type is changeable, | |
1267 | that is we'll be comparing values of this type, fetch the | |
1268 | value now. Otherwise, on the next update the old value | |
1269 | will be lazy, which means we've lost that old value. */ | |
1270 | if (need_to_fetch && value && value_lazy (value)) | |
1271 | { | |
25d5ea92 VP |
1272 | struct varobj *parent = var->parent; |
1273 | int frozen = var->frozen; | |
1274 | for (; !frozen && parent; parent = parent->parent) | |
1275 | frozen |= parent->frozen; | |
1276 | ||
1277 | if (frozen && initial) | |
1278 | { | |
1279 | /* For variables that are frozen, or are children of frozen | |
1280 | variables, we don't do fetch on initial assignment. | |
1281 | For non-initial assignemnt we do the fetch, since it means we're | |
1282 | explicitly asked to compare the new value with the old one. */ | |
1283 | intentionally_not_fetched = 1; | |
1284 | } | |
1285 | else if (!gdb_value_fetch_lazy (value)) | |
acd65feb | 1286 | { |
acd65feb VP |
1287 | /* Set the value to NULL, so that for the next -var-update, |
1288 | we don't try to compare the new value with this value, | |
1289 | that we couldn't even read. */ | |
1290 | value = NULL; | |
1291 | } | |
acd65feb VP |
1292 | } |
1293 | ||
b6313243 | 1294 | |
7a4d50bf VP |
1295 | /* Below, we'll be comparing string rendering of old and new |
1296 | values. Don't get string rendering if the value is | |
1297 | lazy -- if it is, the code above has decided that the value | |
1298 | should not be fetched. */ | |
1299 | if (value && !value_lazy (value)) | |
b6313243 TT |
1300 | print_value = value_get_print_value (value, var->format, |
1301 | var->pretty_printer); | |
7a4d50bf | 1302 | |
acd65feb VP |
1303 | /* If the type is changeable, compare the old and the new values. |
1304 | If this is the initial assignment, we don't have any old value | |
1305 | to compare with. */ | |
7a4d50bf | 1306 | if (!initial && changeable) |
acd65feb VP |
1307 | { |
1308 | /* If the value of the varobj was changed by -var-set-value, then the | |
1309 | value in the varobj and in the target is the same. However, that value | |
1310 | is different from the value that the varobj had after the previous | |
57e66780 | 1311 | -var-update. So need to the varobj as changed. */ |
acd65feb | 1312 | if (var->updated) |
57e66780 | 1313 | { |
57e66780 DJ |
1314 | changed = 1; |
1315 | } | |
acd65feb VP |
1316 | else |
1317 | { | |
1318 | /* Try to compare the values. That requires that both | |
1319 | values are non-lazy. */ | |
25d5ea92 VP |
1320 | if (var->not_fetched && value_lazy (var->value)) |
1321 | { | |
1322 | /* This is a frozen varobj and the value was never read. | |
1323 | Presumably, UI shows some "never read" indicator. | |
1324 | Now that we've fetched the real value, we need to report | |
1325 | this varobj as changed so that UI can show the real | |
1326 | value. */ | |
1327 | changed = 1; | |
1328 | } | |
1329 | else if (var->value == NULL && value == NULL) | |
acd65feb VP |
1330 | /* Equal. */ |
1331 | ; | |
1332 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1333 | { |
57e66780 DJ |
1334 | changed = 1; |
1335 | } | |
acd65feb VP |
1336 | else |
1337 | { | |
1338 | gdb_assert (!value_lazy (var->value)); | |
1339 | gdb_assert (!value_lazy (value)); | |
85265413 | 1340 | |
57e66780 | 1341 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1342 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1343 | changed = 1; |
acd65feb VP |
1344 | } |
1345 | } | |
1346 | } | |
85265413 | 1347 | |
ee342b23 VP |
1348 | if (!initial && !changeable) |
1349 | { | |
1350 | /* For values that are not changeable, we don't compare the values. | |
1351 | However, we want to notice if a value was not NULL and now is NULL, | |
1352 | or vise versa, so that we report when top-level varobjs come in scope | |
1353 | and leave the scope. */ | |
1354 | changed = (var->value != NULL) != (value != NULL); | |
1355 | } | |
1356 | ||
acd65feb | 1357 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1358 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1359 | value_free (var->value); |
1360 | var->value = value; | |
7a4d50bf VP |
1361 | if (var->print_value) |
1362 | xfree (var->print_value); | |
1363 | var->print_value = print_value; | |
25d5ea92 VP |
1364 | if (value && value_lazy (value) && intentionally_not_fetched) |
1365 | var->not_fetched = 1; | |
1366 | else | |
1367 | var->not_fetched = 0; | |
acd65feb | 1368 | var->updated = 0; |
85265413 | 1369 | |
b26ed50d | 1370 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1371 | |
1372 | return changed; | |
1373 | } | |
acd65feb | 1374 | |
b6313243 TT |
1375 | static void |
1376 | install_visualizer (struct varobj *var, PyObject *visualizer) | |
1377 | { | |
1378 | #if HAVE_PYTHON | |
1379 | /* If there are any children now, wipe them. */ | |
1380 | varobj_delete (var, NULL, 1 /* children only */); | |
1381 | var->num_children = -1; | |
1382 | ||
1383 | Py_XDECREF (var->pretty_printer); | |
1384 | var->pretty_printer = visualizer; | |
1385 | ||
1386 | install_new_value (var, var->value, 1); | |
1387 | ||
1388 | /* If we removed the visualizer, and the user ever requested the | |
1389 | object's children, then we must compute the list of children. | |
1390 | Note that we needn't do this when installing a visualizer, | |
1391 | because updating will recompute dynamic children. */ | |
1392 | if (!visualizer && var->children_requested) | |
1393 | varobj_list_children (var); | |
1394 | #else | |
da1f2771 | 1395 | error (_("Python support required")); |
b6313243 TT |
1396 | #endif |
1397 | } | |
1398 | ||
1399 | static void | |
1400 | install_default_visualizer (struct varobj *var) | |
1401 | { | |
1402 | #if HAVE_PYTHON | |
1403 | struct cleanup *cleanup; | |
1404 | PyGILState_STATE state; | |
1405 | PyObject *pretty_printer = NULL; | |
1406 | ||
1407 | state = PyGILState_Ensure (); | |
1408 | cleanup = make_cleanup_py_restore_gil (&state); | |
1409 | ||
1410 | if (var->value) | |
1411 | { | |
1412 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value); | |
1413 | if (! pretty_printer) | |
1414 | { | |
1415 | gdbpy_print_stack (); | |
1416 | error (_("Cannot instantiate printer for default visualizer")); | |
1417 | } | |
1418 | } | |
1419 | ||
1420 | if (pretty_printer == Py_None) | |
1421 | { | |
1422 | Py_DECREF (pretty_printer); | |
1423 | pretty_printer = NULL; | |
1424 | } | |
1425 | ||
1426 | install_visualizer (var, pretty_printer); | |
1427 | do_cleanups (cleanup); | |
1428 | #else | |
1429 | /* No error is right as this function is inserted just as a hook. */ | |
1430 | #endif | |
1431 | } | |
1432 | ||
1433 | void | |
1434 | varobj_set_visualizer (struct varobj *var, const char *visualizer) | |
1435 | { | |
1436 | #if HAVE_PYTHON | |
1437 | PyObject *mainmod, *globals, *pretty_printer, *constructor; | |
1438 | struct cleanup *back_to, *value; | |
1439 | PyGILState_STATE state; | |
1440 | ||
1441 | ||
1442 | state = PyGILState_Ensure (); | |
1443 | back_to = make_cleanup_py_restore_gil (&state); | |
1444 | ||
1445 | mainmod = PyImport_AddModule ("__main__"); | |
1446 | globals = PyModule_GetDict (mainmod); | |
1447 | Py_INCREF (globals); | |
1448 | make_cleanup_py_decref (globals); | |
1449 | ||
1450 | constructor = PyRun_String (visualizer, Py_eval_input, globals, globals); | |
1451 | ||
1452 | /* Do not instantiate NoneType. */ | |
1453 | if (constructor == Py_None) | |
1454 | { | |
1455 | pretty_printer = Py_None; | |
1456 | Py_INCREF (pretty_printer); | |
1457 | } | |
1458 | else | |
1459 | pretty_printer = instantiate_pretty_printer (constructor, var->value); | |
1460 | ||
1461 | Py_XDECREF (constructor); | |
1462 | ||
1463 | if (! pretty_printer) | |
1464 | { | |
1465 | gdbpy_print_stack (); | |
da1f2771 | 1466 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
b6313243 TT |
1467 | } |
1468 | ||
1469 | if (pretty_printer == Py_None) | |
1470 | { | |
1471 | Py_DECREF (pretty_printer); | |
1472 | pretty_printer = NULL; | |
1473 | } | |
1474 | ||
1475 | install_visualizer (var, pretty_printer); | |
1476 | ||
1477 | do_cleanups (back_to); | |
1478 | #else | |
da1f2771 | 1479 | error (_("Python support required")); |
b6313243 TT |
1480 | #endif |
1481 | } | |
1482 | ||
8b93c638 JM |
1483 | /* Update the values for a variable and its children. This is a |
1484 | two-pronged attack. First, re-parse the value for the root's | |
1485 | expression to see if it's changed. Then go all the way | |
1486 | through its children, reconstructing them and noting if they've | |
1487 | changed. | |
1488 | ||
25d5ea92 VP |
1489 | The EXPLICIT parameter specifies if this call is result |
1490 | of MI request to update this specific variable, or | |
1491 | result of implicit -var-update *. For implicit request, we don't | |
1492 | update frozen variables. | |
705da579 KS |
1493 | |
1494 | NOTE: This function may delete the caller's varobj. If it | |
8756216b DP |
1495 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1496 | to point to the new varobj. */ | |
8b93c638 | 1497 | |
f7f9ae2c | 1498 | VEC(varobj_update_result) *varobj_update (struct varobj **varp, int explicit) |
8b93c638 JM |
1499 | { |
1500 | int changed = 0; | |
25d5ea92 | 1501 | int type_changed = 0; |
8b93c638 JM |
1502 | int i; |
1503 | int vleft; | |
8b93c638 JM |
1504 | struct varobj *v; |
1505 | struct varobj **cv; | |
2c67cb8b | 1506 | struct varobj **templist = NULL; |
30b28db1 | 1507 | struct value *new; |
b6313243 | 1508 | VEC (varobj_update_result) *stack = NULL; |
f7f9ae2c | 1509 | VEC (varobj_update_result) *result = NULL; |
e64d9b3d | 1510 | struct frame_info *fi; |
8b93c638 | 1511 | |
25d5ea92 VP |
1512 | /* Frozen means frozen -- we don't check for any change in |
1513 | this varobj, including its going out of scope, or | |
1514 | changing type. One use case for frozen varobjs is | |
1515 | retaining previously evaluated expressions, and we don't | |
1516 | want them to be reevaluated at all. */ | |
1517 | if (!explicit && (*varp)->frozen) | |
f7f9ae2c | 1518 | return result; |
8756216b DP |
1519 | |
1520 | if (!(*varp)->root->is_valid) | |
f7f9ae2c VP |
1521 | { |
1522 | varobj_update_result r = {*varp}; | |
1523 | r.status = VAROBJ_INVALID; | |
1524 | VEC_safe_push (varobj_update_result, result, &r); | |
1525 | return result; | |
1526 | } | |
8b93c638 | 1527 | |
25d5ea92 | 1528 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1529 | { |
f7f9ae2c VP |
1530 | varobj_update_result r = {*varp}; |
1531 | r.status = VAROBJ_IN_SCOPE; | |
1532 | ||
25d5ea92 VP |
1533 | /* Update the root variable. value_of_root can return NULL |
1534 | if the variable is no longer around, i.e. we stepped out of | |
1535 | the frame in which a local existed. We are letting the | |
1536 | value_of_root variable dispose of the varobj if the type | |
1537 | has changed. */ | |
25d5ea92 | 1538 | new = value_of_root (varp, &type_changed); |
f7f9ae2c VP |
1539 | r.varobj = *varp; |
1540 | ||
1541 | r.type_changed = type_changed; | |
ea56f9c2 | 1542 | if (install_new_value ((*varp), new, type_changed)) |
f7f9ae2c | 1543 | r.changed = 1; |
ea56f9c2 | 1544 | |
25d5ea92 | 1545 | if (new == NULL) |
f7f9ae2c | 1546 | r.status = VAROBJ_NOT_IN_SCOPE; |
b6313243 | 1547 | r.value_installed = 1; |
f7f9ae2c VP |
1548 | |
1549 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
b6313243 | 1550 | { |
0b4bc29a JK |
1551 | if (r.type_changed || r.changed) |
1552 | VEC_safe_push (varobj_update_result, result, &r); | |
b6313243 TT |
1553 | return result; |
1554 | } | |
1555 | ||
1556 | VEC_safe_push (varobj_update_result, stack, &r); | |
1557 | } | |
1558 | else | |
1559 | { | |
1560 | varobj_update_result r = {*varp}; | |
1561 | VEC_safe_push (varobj_update_result, stack, &r); | |
b20d8971 | 1562 | } |
8b93c638 | 1563 | |
8756216b | 1564 | /* Walk through the children, reconstructing them all. */ |
b6313243 | 1565 | while (!VEC_empty (varobj_update_result, stack)) |
8b93c638 | 1566 | { |
b6313243 TT |
1567 | varobj_update_result r = *(VEC_last (varobj_update_result, stack)); |
1568 | struct varobj *v = r.varobj; | |
1569 | ||
1570 | VEC_pop (varobj_update_result, stack); | |
1571 | ||
1572 | /* Update this variable, unless it's a root, which is already | |
1573 | updated. */ | |
1574 | if (!r.value_installed) | |
1575 | { | |
1576 | new = value_of_child (v->parent, v->index); | |
1577 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1578 | { | |
1579 | r.changed = 1; | |
1580 | v->updated = 0; | |
1581 | } | |
1582 | } | |
1583 | ||
1584 | /* We probably should not get children of a varobj that has a | |
1585 | pretty-printer, but for which -var-list-children was never | |
1586 | invoked. Presumably, such varobj is not yet expanded in the | |
1587 | UI, so we need not bother getting it. */ | |
1588 | if (v->pretty_printer) | |
1589 | { | |
1590 | VEC (varobj_p) *changed = 0, *new_and_unchanged = 0; | |
1591 | int i, children_changed; | |
1592 | varobj_p tmp; | |
1593 | ||
1594 | if (!v->children_requested) | |
1595 | continue; | |
1596 | ||
1597 | if (v->frozen) | |
1598 | continue; | |
1599 | ||
1600 | /* If update_dynamic_varobj_children returns 0, then we have | |
1601 | a non-conforming pretty-printer, so we skip it. */ | |
1602 | if (update_dynamic_varobj_children (v, &changed, &new_and_unchanged, | |
1603 | &children_changed)) | |
1604 | { | |
1605 | if (children_changed) | |
1606 | r.children_changed = 1; | |
1607 | for (i = 0; VEC_iterate (varobj_p, changed, i, tmp); ++i) | |
1608 | { | |
1609 | varobj_update_result r = {tmp}; | |
1610 | r.changed = 1; | |
1611 | r.value_installed = 1; | |
1612 | VEC_safe_push (varobj_update_result, stack, &r); | |
1613 | } | |
1614 | for (i = 0; | |
1615 | VEC_iterate (varobj_p, new_and_unchanged, i, tmp); | |
1616 | ++i) | |
1617 | { | |
1618 | varobj_update_result r = {tmp}; | |
1619 | r.value_installed = 1; | |
1620 | VEC_safe_push (varobj_update_result, stack, &r); | |
1621 | } | |
1622 | if (r.changed || r.children_changed) | |
1623 | VEC_safe_push (varobj_update_result, result, &r); | |
1624 | continue; | |
1625 | } | |
1626 | } | |
28335dcc VP |
1627 | |
1628 | /* Push any children. Use reverse order so that the first | |
1629 | child is popped from the work stack first, and so | |
1630 | will be added to result first. This does not | |
1631 | affect correctness, just "nicer". */ | |
1632 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1633 | { |
28335dcc VP |
1634 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1635 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
25d5ea92 | 1636 | if (c != NULL && !c->frozen) |
28335dcc | 1637 | { |
b6313243 TT |
1638 | varobj_update_result r = {c}; |
1639 | VEC_safe_push (varobj_update_result, stack, &r); | |
28335dcc | 1640 | } |
8b93c638 | 1641 | } |
b6313243 TT |
1642 | |
1643 | if (r.changed || r.type_changed) | |
1644 | VEC_safe_push (varobj_update_result, result, &r); | |
8b93c638 JM |
1645 | } |
1646 | ||
b6313243 TT |
1647 | VEC_free (varobj_update_result, stack); |
1648 | ||
f7f9ae2c | 1649 | return result; |
8b93c638 JM |
1650 | } |
1651 | \f | |
1652 | ||
1653 | /* Helper functions */ | |
1654 | ||
1655 | /* | |
1656 | * Variable object construction/destruction | |
1657 | */ | |
1658 | ||
1659 | static int | |
fba45db2 KB |
1660 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1661 | int only_children_p) | |
8b93c638 JM |
1662 | { |
1663 | int delcount = 0; | |
1664 | ||
1665 | delete_variable_1 (resultp, &delcount, var, | |
1666 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1667 | ||
1668 | return delcount; | |
1669 | } | |
1670 | ||
1671 | /* Delete the variable object VAR and its children */ | |
1672 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1673 | and the parent is not removed we dump core. It must be always | |
1674 | initially called with remove_from_parent_p set */ | |
1675 | static void | |
72330bd6 AC |
1676 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1677 | struct varobj *var, int only_children_p, | |
1678 | int remove_from_parent_p) | |
8b93c638 | 1679 | { |
28335dcc | 1680 | int i; |
8b93c638 JM |
1681 | |
1682 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1683 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1684 | { | |
1685 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
214270ab VP |
1686 | if (!child) |
1687 | continue; | |
8b93c638 | 1688 | if (!remove_from_parent_p) |
28335dcc VP |
1689 | child->parent = NULL; |
1690 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1691 | } |
28335dcc | 1692 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1693 | |
1694 | /* if we were called to delete only the children we are done here */ | |
1695 | if (only_children_p) | |
1696 | return; | |
1697 | ||
1698 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1699 | /* If the name is null, this is a temporary variable, that has not |
1700 | yet been installed, don't report it, it belongs to the caller... */ | |
1701 | if (var->obj_name != NULL) | |
8b93c638 | 1702 | { |
5b616ba1 | 1703 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1704 | *delcountp = *delcountp + 1; |
1705 | } | |
1706 | ||
1707 | /* If this variable has a parent, remove it from its parent's list */ | |
1708 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1709 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1710 | expensive list search to find the element to remove when we are | |
1711 | discarding the list afterwards */ | |
72330bd6 | 1712 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1713 | { |
28335dcc | 1714 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1715 | } |
72330bd6 | 1716 | |
73a93a32 JI |
1717 | if (var->obj_name != NULL) |
1718 | uninstall_variable (var); | |
8b93c638 JM |
1719 | |
1720 | /* Free memory associated with this variable */ | |
1721 | free_variable (var); | |
1722 | } | |
1723 | ||
1724 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1725 | static int | |
fba45db2 | 1726 | install_variable (struct varobj *var) |
8b93c638 JM |
1727 | { |
1728 | struct vlist *cv; | |
1729 | struct vlist *newvl; | |
1730 | const char *chp; | |
1731 | unsigned int index = 0; | |
1732 | unsigned int i = 1; | |
1733 | ||
1734 | for (chp = var->obj_name; *chp; chp++) | |
1735 | { | |
1736 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1737 | } | |
1738 | ||
1739 | cv = *(varobj_table + index); | |
1740 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1741 | cv = cv->next; | |
1742 | ||
1743 | if (cv != NULL) | |
8a3fe4f8 | 1744 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1745 | |
1746 | /* Add varobj to hash table */ | |
1747 | newvl = xmalloc (sizeof (struct vlist)); | |
1748 | newvl->next = *(varobj_table + index); | |
1749 | newvl->var = var; | |
1750 | *(varobj_table + index) = newvl; | |
1751 | ||
1752 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1753 | if (is_root_p (var)) |
8b93c638 JM |
1754 | { |
1755 | /* Add to list of root variables */ | |
1756 | if (rootlist == NULL) | |
1757 | var->root->next = NULL; | |
1758 | else | |
1759 | var->root->next = rootlist; | |
1760 | rootlist = var->root; | |
1761 | rootcount++; | |
1762 | } | |
1763 | ||
1764 | return 1; /* OK */ | |
1765 | } | |
1766 | ||
1767 | /* Unistall the object VAR. */ | |
1768 | static void | |
fba45db2 | 1769 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1770 | { |
1771 | struct vlist *cv; | |
1772 | struct vlist *prev; | |
1773 | struct varobj_root *cr; | |
1774 | struct varobj_root *prer; | |
1775 | const char *chp; | |
1776 | unsigned int index = 0; | |
1777 | unsigned int i = 1; | |
1778 | ||
1779 | /* Remove varobj from hash table */ | |
1780 | for (chp = var->obj_name; *chp; chp++) | |
1781 | { | |
1782 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1783 | } | |
1784 | ||
1785 | cv = *(varobj_table + index); | |
1786 | prev = NULL; | |
1787 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1788 | { | |
1789 | prev = cv; | |
1790 | cv = cv->next; | |
1791 | } | |
1792 | ||
1793 | if (varobjdebug) | |
1794 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1795 | ||
1796 | if (cv == NULL) | |
1797 | { | |
72330bd6 AC |
1798 | warning |
1799 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1800 | var->obj_name); | |
8b93c638 JM |
1801 | return; |
1802 | } | |
1803 | ||
1804 | if (prev == NULL) | |
1805 | *(varobj_table + index) = cv->next; | |
1806 | else | |
1807 | prev->next = cv->next; | |
1808 | ||
b8c9b27d | 1809 | xfree (cv); |
8b93c638 JM |
1810 | |
1811 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1812 | if (is_root_p (var)) |
8b93c638 JM |
1813 | { |
1814 | /* Remove from list of root variables */ | |
1815 | if (rootlist == var->root) | |
1816 | rootlist = var->root->next; | |
1817 | else | |
1818 | { | |
1819 | prer = NULL; | |
1820 | cr = rootlist; | |
1821 | while ((cr != NULL) && (cr->rootvar != var)) | |
1822 | { | |
1823 | prer = cr; | |
1824 | cr = cr->next; | |
1825 | } | |
1826 | if (cr == NULL) | |
1827 | { | |
72330bd6 AC |
1828 | warning |
1829 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1830 | var->obj_name); | |
8b93c638 JM |
1831 | return; |
1832 | } | |
1833 | if (prer == NULL) | |
1834 | rootlist = NULL; | |
1835 | else | |
1836 | prer->next = cr->next; | |
1837 | } | |
1838 | rootcount--; | |
1839 | } | |
1840 | ||
1841 | } | |
1842 | ||
8b93c638 JM |
1843 | /* Create and install a child of the parent of the given name */ |
1844 | static struct varobj * | |
fba45db2 | 1845 | create_child (struct varobj *parent, int index, char *name) |
b6313243 TT |
1846 | { |
1847 | return create_child_with_value (parent, index, name, | |
1848 | value_of_child (parent, index)); | |
1849 | } | |
1850 | ||
1851 | static struct varobj * | |
1852 | create_child_with_value (struct varobj *parent, int index, const char *name, | |
1853 | struct value *value) | |
8b93c638 JM |
1854 | { |
1855 | struct varobj *child; | |
1856 | char *childs_name; | |
1857 | ||
1858 | child = new_variable (); | |
1859 | ||
1860 | /* name is allocated by name_of_child */ | |
b6313243 TT |
1861 | /* FIXME: xstrdup should not be here. */ |
1862 | child->name = xstrdup (name); | |
8b93c638 | 1863 | child->index = index; |
8b93c638 JM |
1864 | child->parent = parent; |
1865 | child->root = parent->root; | |
b435e160 | 1866 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1867 | child->obj_name = childs_name; |
1868 | install_variable (child); | |
1869 | ||
acd65feb VP |
1870 | /* Compute the type of the child. Must do this before |
1871 | calling install_new_value. */ | |
1872 | if (value != NULL) | |
1873 | /* If the child had no evaluation errors, var->value | |
1874 | will be non-NULL and contain a valid type. */ | |
1875 | child->type = value_type (value); | |
1876 | else | |
1877 | /* Otherwise, we must compute the type. */ | |
1878 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1879 | child->index); | |
1880 | install_new_value (child, value, 1); | |
1881 | ||
8b93c638 JM |
1882 | return child; |
1883 | } | |
8b93c638 JM |
1884 | \f |
1885 | ||
1886 | /* | |
1887 | * Miscellaneous utility functions. | |
1888 | */ | |
1889 | ||
1890 | /* Allocate memory and initialize a new variable */ | |
1891 | static struct varobj * | |
1892 | new_variable (void) | |
1893 | { | |
1894 | struct varobj *var; | |
1895 | ||
1896 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1897 | var->name = NULL; | |
02142340 | 1898 | var->path_expr = NULL; |
8b93c638 JM |
1899 | var->obj_name = NULL; |
1900 | var->index = -1; | |
1901 | var->type = NULL; | |
1902 | var->value = NULL; | |
8b93c638 JM |
1903 | var->num_children = -1; |
1904 | var->parent = NULL; | |
1905 | var->children = NULL; | |
1906 | var->format = 0; | |
1907 | var->root = NULL; | |
fb9b6b35 | 1908 | var->updated = 0; |
85265413 | 1909 | var->print_value = NULL; |
25d5ea92 VP |
1910 | var->frozen = 0; |
1911 | var->not_fetched = 0; | |
b6313243 TT |
1912 | var->children_requested = 0; |
1913 | var->pretty_printer = 0; | |
8b93c638 JM |
1914 | |
1915 | return var; | |
1916 | } | |
1917 | ||
1918 | /* Allocate memory and initialize a new root variable */ | |
1919 | static struct varobj * | |
1920 | new_root_variable (void) | |
1921 | { | |
1922 | struct varobj *var = new_variable (); | |
1923 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1924 | var->root->lang = NULL; | |
1925 | var->root->exp = NULL; | |
1926 | var->root->valid_block = NULL; | |
7a424e99 | 1927 | var->root->frame = null_frame_id; |
a5defcdc | 1928 | var->root->floating = 0; |
8b93c638 | 1929 | var->root->rootvar = NULL; |
8756216b | 1930 | var->root->is_valid = 1; |
8b93c638 JM |
1931 | |
1932 | return var; | |
1933 | } | |
1934 | ||
1935 | /* Free any allocated memory associated with VAR. */ | |
1936 | static void | |
fba45db2 | 1937 | free_variable (struct varobj *var) |
8b93c638 | 1938 | { |
36746093 JK |
1939 | value_free (var->value); |
1940 | ||
8b93c638 | 1941 | /* Free the expression if this is a root variable. */ |
b2c2bd75 | 1942 | if (is_root_p (var)) |
8b93c638 | 1943 | { |
3038237c | 1944 | xfree (var->root->exp); |
8038e1e2 | 1945 | xfree (var->root); |
8b93c638 JM |
1946 | } |
1947 | ||
b6313243 TT |
1948 | #if HAVE_PYTHON |
1949 | { | |
1950 | PyGILState_STATE state = PyGILState_Ensure (); | |
1951 | Py_XDECREF (var->pretty_printer); | |
1952 | PyGILState_Release (state); | |
1953 | } | |
1954 | #endif | |
1955 | ||
8038e1e2 AC |
1956 | xfree (var->name); |
1957 | xfree (var->obj_name); | |
85265413 | 1958 | xfree (var->print_value); |
02142340 | 1959 | xfree (var->path_expr); |
8038e1e2 | 1960 | xfree (var); |
8b93c638 JM |
1961 | } |
1962 | ||
74b7792f AC |
1963 | static void |
1964 | do_free_variable_cleanup (void *var) | |
1965 | { | |
1966 | free_variable (var); | |
1967 | } | |
1968 | ||
1969 | static struct cleanup * | |
1970 | make_cleanup_free_variable (struct varobj *var) | |
1971 | { | |
1972 | return make_cleanup (do_free_variable_cleanup, var); | |
1973 | } | |
1974 | ||
6766a268 DJ |
1975 | /* This returns the type of the variable. It also skips past typedefs |
1976 | to return the real type of the variable. | |
94b66fa7 KS |
1977 | |
1978 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1979 | except within get_target_type and get_type. */ | |
8b93c638 | 1980 | static struct type * |
fba45db2 | 1981 | get_type (struct varobj *var) |
8b93c638 JM |
1982 | { |
1983 | struct type *type; | |
1984 | type = var->type; | |
1985 | ||
6766a268 DJ |
1986 | if (type != NULL) |
1987 | type = check_typedef (type); | |
8b93c638 JM |
1988 | |
1989 | return type; | |
1990 | } | |
1991 | ||
6e2a9270 VP |
1992 | /* Return the type of the value that's stored in VAR, |
1993 | or that would have being stored there if the | |
1994 | value were accessible. | |
1995 | ||
1996 | This differs from VAR->type in that VAR->type is always | |
1997 | the true type of the expession in the source language. | |
1998 | The return value of this function is the type we're | |
1999 | actually storing in varobj, and using for displaying | |
2000 | the values and for comparing previous and new values. | |
2001 | ||
2002 | For example, top-level references are always stripped. */ | |
2003 | static struct type * | |
2004 | get_value_type (struct varobj *var) | |
2005 | { | |
2006 | struct type *type; | |
2007 | ||
2008 | if (var->value) | |
2009 | type = value_type (var->value); | |
2010 | else | |
2011 | type = var->type; | |
2012 | ||
2013 | type = check_typedef (type); | |
2014 | ||
2015 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
2016 | type = get_target_type (type); | |
2017 | ||
2018 | type = check_typedef (type); | |
2019 | ||
2020 | return type; | |
2021 | } | |
2022 | ||
8b93c638 | 2023 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
2024 | past typedefs, just like get_type (). |
2025 | ||
2026 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
2027 | except within get_target_type and get_type. */ | |
8b93c638 | 2028 | static struct type * |
fba45db2 | 2029 | get_target_type (struct type *type) |
8b93c638 JM |
2030 | { |
2031 | if (type != NULL) | |
2032 | { | |
2033 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
2034 | if (type != NULL) |
2035 | type = check_typedef (type); | |
8b93c638 JM |
2036 | } |
2037 | ||
2038 | return type; | |
2039 | } | |
2040 | ||
2041 | /* What is the default display for this variable? We assume that | |
2042 | everything is "natural". Any exceptions? */ | |
2043 | static enum varobj_display_formats | |
fba45db2 | 2044 | variable_default_display (struct varobj *var) |
8b93c638 JM |
2045 | { |
2046 | return FORMAT_NATURAL; | |
2047 | } | |
2048 | ||
8b93c638 JM |
2049 | /* FIXME: The following should be generic for any pointer */ |
2050 | static void | |
fba45db2 | 2051 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
2052 | { |
2053 | struct cpstack *s; | |
2054 | ||
2055 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
2056 | s->name = name; | |
2057 | s->next = *pstack; | |
2058 | *pstack = s; | |
2059 | } | |
2060 | ||
2061 | /* FIXME: The following should be generic for any pointer */ | |
2062 | static char * | |
fba45db2 | 2063 | cppop (struct cpstack **pstack) |
8b93c638 JM |
2064 | { |
2065 | struct cpstack *s; | |
2066 | char *v; | |
2067 | ||
2068 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
2069 | return NULL; | |
2070 | ||
2071 | s = *pstack; | |
2072 | v = s->name; | |
2073 | *pstack = (*pstack)->next; | |
b8c9b27d | 2074 | xfree (s); |
8b93c638 JM |
2075 | |
2076 | return v; | |
2077 | } | |
2078 | \f | |
2079 | /* | |
2080 | * Language-dependencies | |
2081 | */ | |
2082 | ||
2083 | /* Common entry points */ | |
2084 | ||
2085 | /* Get the language of variable VAR. */ | |
2086 | static enum varobj_languages | |
fba45db2 | 2087 | variable_language (struct varobj *var) |
8b93c638 JM |
2088 | { |
2089 | enum varobj_languages lang; | |
2090 | ||
2091 | switch (var->root->exp->language_defn->la_language) | |
2092 | { | |
2093 | default: | |
2094 | case language_c: | |
2095 | lang = vlang_c; | |
2096 | break; | |
2097 | case language_cplus: | |
2098 | lang = vlang_cplus; | |
2099 | break; | |
2100 | case language_java: | |
2101 | lang = vlang_java; | |
2102 | break; | |
2103 | } | |
2104 | ||
2105 | return lang; | |
2106 | } | |
2107 | ||
2108 | /* Return the number of children for a given variable. | |
2109 | The result of this function is defined by the language | |
2110 | implementation. The number of children returned by this function | |
2111 | is the number of children that the user will see in the variable | |
2112 | display. */ | |
2113 | static int | |
fba45db2 | 2114 | number_of_children (struct varobj *var) |
8b93c638 JM |
2115 | { |
2116 | return (*var->root->lang->number_of_children) (var);; | |
2117 | } | |
2118 | ||
2119 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
2120 | static char * | |
fba45db2 | 2121 | name_of_variable (struct varobj *var) |
8b93c638 JM |
2122 | { |
2123 | return (*var->root->lang->name_of_variable) (var); | |
2124 | } | |
2125 | ||
2126 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
2127 | static char * | |
fba45db2 | 2128 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
2129 | { |
2130 | return (*var->root->lang->name_of_child) (var, index); | |
2131 | } | |
2132 | ||
a5defcdc VP |
2133 | /* What is the ``struct value *'' of the root variable VAR? |
2134 | For floating variable object, evaluation can get us a value | |
2135 | of different type from what is stored in varobj already. In | |
2136 | that case: | |
2137 | - *type_changed will be set to 1 | |
2138 | - old varobj will be freed, and new one will be | |
2139 | created, with the same name. | |
2140 | - *var_handle will be set to the new varobj | |
2141 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 2142 | static struct value * |
fba45db2 | 2143 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 2144 | { |
73a93a32 JI |
2145 | struct varobj *var; |
2146 | ||
2147 | if (var_handle == NULL) | |
2148 | return NULL; | |
2149 | ||
2150 | var = *var_handle; | |
2151 | ||
2152 | /* This should really be an exception, since this should | |
2153 | only get called with a root variable. */ | |
2154 | ||
b2c2bd75 | 2155 | if (!is_root_p (var)) |
73a93a32 JI |
2156 | return NULL; |
2157 | ||
a5defcdc | 2158 | if (var->root->floating) |
73a93a32 JI |
2159 | { |
2160 | struct varobj *tmp_var; | |
2161 | char *old_type, *new_type; | |
6225abfa | 2162 | |
73a93a32 JI |
2163 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
2164 | USE_SELECTED_FRAME); | |
2165 | if (tmp_var == NULL) | |
2166 | { | |
2167 | return NULL; | |
2168 | } | |
6225abfa | 2169 | old_type = varobj_get_type (var); |
73a93a32 | 2170 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 2171 | if (strcmp (old_type, new_type) == 0) |
73a93a32 | 2172 | { |
fcacd99f VP |
2173 | /* The expression presently stored inside var->root->exp |
2174 | remembers the locations of local variables relatively to | |
2175 | the frame where the expression was created (in DWARF location | |
2176 | button, for example). Naturally, those locations are not | |
2177 | correct in other frames, so update the expression. */ | |
2178 | ||
2179 | struct expression *tmp_exp = var->root->exp; | |
2180 | var->root->exp = tmp_var->root->exp; | |
2181 | tmp_var->root->exp = tmp_exp; | |
2182 | ||
73a93a32 JI |
2183 | varobj_delete (tmp_var, NULL, 0); |
2184 | *type_changed = 0; | |
2185 | } | |
2186 | else | |
2187 | { | |
1b36a34b | 2188 | tmp_var->obj_name = xstrdup (var->obj_name); |
a5defcdc VP |
2189 | varobj_delete (var, NULL, 0); |
2190 | ||
73a93a32 JI |
2191 | install_variable (tmp_var); |
2192 | *var_handle = tmp_var; | |
705da579 | 2193 | var = *var_handle; |
73a93a32 JI |
2194 | *type_changed = 1; |
2195 | } | |
74dddad3 MS |
2196 | xfree (old_type); |
2197 | xfree (new_type); | |
73a93a32 JI |
2198 | } |
2199 | else | |
2200 | { | |
2201 | *type_changed = 0; | |
2202 | } | |
2203 | ||
2204 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
2205 | } |
2206 | ||
30b28db1 AC |
2207 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
2208 | static struct value * | |
fba45db2 | 2209 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 2210 | { |
30b28db1 | 2211 | struct value *value; |
8b93c638 JM |
2212 | |
2213 | value = (*parent->root->lang->value_of_child) (parent, index); | |
2214 | ||
8b93c638 JM |
2215 | return value; |
2216 | } | |
2217 | ||
8b93c638 JM |
2218 | /* GDB already has a command called "value_of_variable". Sigh. */ |
2219 | static char * | |
de051565 | 2220 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2221 | { |
8756216b | 2222 | if (var->root->is_valid) |
de051565 | 2223 | return (*var->root->lang->value_of_variable) (var, format); |
8756216b DP |
2224 | else |
2225 | return NULL; | |
8b93c638 JM |
2226 | } |
2227 | ||
85265413 | 2228 | static char * |
b6313243 TT |
2229 | value_get_print_value (struct value *value, enum varobj_display_formats format, |
2230 | PyObject *value_formatter) | |
85265413 NR |
2231 | { |
2232 | long dummy; | |
57e66780 DJ |
2233 | struct ui_file *stb; |
2234 | struct cleanup *old_chain; | |
b6313243 | 2235 | char *thevalue = NULL; |
79a45b7d | 2236 | struct value_print_options opts; |
57e66780 DJ |
2237 | |
2238 | if (value == NULL) | |
2239 | return NULL; | |
2240 | ||
b6313243 TT |
2241 | #if HAVE_PYTHON |
2242 | { | |
2243 | PyGILState_STATE state = PyGILState_Ensure (); | |
2244 | if (value_formatter && PyObject_HasAttr (value_formatter, | |
2245 | gdbpy_to_string_cst)) | |
2246 | { | |
2247 | char *hint; | |
2248 | struct value *replacement; | |
2249 | int string_print = 0; | |
2250 | ||
2251 | hint = gdbpy_get_display_hint (value_formatter); | |
2252 | if (hint) | |
2253 | { | |
2254 | if (!strcmp (hint, "string")) | |
2255 | string_print = 1; | |
2256 | xfree (hint); | |
2257 | } | |
2258 | ||
2259 | thevalue = apply_varobj_pretty_printer (value_formatter, | |
2260 | &replacement); | |
2261 | if (thevalue && !string_print) | |
2262 | { | |
2263 | PyGILState_Release (state); | |
2264 | return thevalue; | |
2265 | } | |
2266 | if (replacement) | |
2267 | value = replacement; | |
2268 | } | |
2269 | PyGILState_Release (state); | |
2270 | } | |
2271 | #endif | |
2272 | ||
57e66780 DJ |
2273 | stb = mem_fileopen (); |
2274 | old_chain = make_cleanup_ui_file_delete (stb); | |
2275 | ||
79a45b7d TT |
2276 | get_formatted_print_options (&opts, format_code[(int) format]); |
2277 | opts.deref_ref = 0; | |
b6313243 TT |
2278 | opts.raw = 1; |
2279 | if (thevalue) | |
2280 | { | |
2281 | make_cleanup (xfree, thevalue); | |
2282 | LA_PRINT_STRING (stb, builtin_type (current_gdbarch)->builtin_char, | |
2283 | (gdb_byte *) thevalue, strlen (thevalue), | |
2284 | 0, &opts); | |
2285 | } | |
2286 | else | |
2287 | common_val_print (value, stb, 0, &opts, current_language); | |
85265413 | 2288 | thevalue = ui_file_xstrdup (stb, &dummy); |
57e66780 | 2289 | |
85265413 NR |
2290 | do_cleanups (old_chain); |
2291 | return thevalue; | |
2292 | } | |
2293 | ||
340a7723 NR |
2294 | int |
2295 | varobj_editable_p (struct varobj *var) | |
2296 | { | |
2297 | struct type *type; | |
2298 | struct value *value; | |
2299 | ||
2300 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
2301 | return 0; | |
2302 | ||
2303 | type = get_value_type (var); | |
2304 | ||
2305 | switch (TYPE_CODE (type)) | |
2306 | { | |
2307 | case TYPE_CODE_STRUCT: | |
2308 | case TYPE_CODE_UNION: | |
2309 | case TYPE_CODE_ARRAY: | |
2310 | case TYPE_CODE_FUNC: | |
2311 | case TYPE_CODE_METHOD: | |
2312 | return 0; | |
2313 | break; | |
2314 | ||
2315 | default: | |
2316 | return 1; | |
2317 | break; | |
2318 | } | |
2319 | } | |
2320 | ||
acd65feb VP |
2321 | /* Return non-zero if changes in value of VAR |
2322 | must be detected and reported by -var-update. | |
2323 | Return zero is -var-update should never report | |
2324 | changes of such values. This makes sense for structures | |
2325 | (since the changes in children values will be reported separately), | |
2326 | or for artifical objects (like 'public' pseudo-field in C++). | |
2327 | ||
2328 | Return value of 0 means that gdb need not call value_fetch_lazy | |
2329 | for the value of this variable object. */ | |
8b93c638 | 2330 | static int |
b2c2bd75 | 2331 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
2332 | { |
2333 | int r; | |
2334 | struct type *type; | |
2335 | ||
2336 | if (CPLUS_FAKE_CHILD (var)) | |
2337 | return 0; | |
2338 | ||
6e2a9270 | 2339 | type = get_value_type (var); |
8b93c638 JM |
2340 | |
2341 | switch (TYPE_CODE (type)) | |
2342 | { | |
72330bd6 AC |
2343 | case TYPE_CODE_STRUCT: |
2344 | case TYPE_CODE_UNION: | |
2345 | case TYPE_CODE_ARRAY: | |
2346 | r = 0; | |
2347 | break; | |
8b93c638 | 2348 | |
72330bd6 AC |
2349 | default: |
2350 | r = 1; | |
8b93c638 JM |
2351 | } |
2352 | ||
2353 | return r; | |
2354 | } | |
2355 | ||
5a413362 VP |
2356 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
2357 | selected frame, and not bound to thread/frame. Such variable objects | |
2358 | are created using '@' as frame specifier to -var-create. */ | |
2359 | int | |
2360 | varobj_floating_p (struct varobj *var) | |
2361 | { | |
2362 | return var->root->floating; | |
2363 | } | |
2364 | ||
2024f65a VP |
2365 | /* Given the value and the type of a variable object, |
2366 | adjust the value and type to those necessary | |
2367 | for getting children of the variable object. | |
2368 | This includes dereferencing top-level references | |
2369 | to all types and dereferencing pointers to | |
2370 | structures. | |
2371 | ||
2372 | Both TYPE and *TYPE should be non-null. VALUE | |
2373 | can be null if we want to only translate type. | |
2374 | *VALUE can be null as well -- if the parent | |
02142340 VP |
2375 | value is not known. |
2376 | ||
2377 | If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1 | |
b6313243 | 2378 | depending on whether pointer was dereferenced |
02142340 | 2379 | in this function. */ |
2024f65a VP |
2380 | static void |
2381 | adjust_value_for_child_access (struct value **value, | |
02142340 VP |
2382 | struct type **type, |
2383 | int *was_ptr) | |
2024f65a VP |
2384 | { |
2385 | gdb_assert (type && *type); | |
2386 | ||
02142340 VP |
2387 | if (was_ptr) |
2388 | *was_ptr = 0; | |
2389 | ||
2024f65a VP |
2390 | *type = check_typedef (*type); |
2391 | ||
2392 | /* The type of value stored in varobj, that is passed | |
2393 | to us, is already supposed to be | |
2394 | reference-stripped. */ | |
2395 | ||
2396 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
2397 | ||
2398 | /* Pointers to structures are treated just like | |
2399 | structures when accessing children. Don't | |
2400 | dererences pointers to other types. */ | |
2401 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
2402 | { | |
2403 | struct type *target_type = get_target_type (*type); | |
2404 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
2405 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
2406 | { | |
2407 | if (value && *value) | |
3f4178d6 DJ |
2408 | { |
2409 | int success = gdb_value_ind (*value, value); | |
2410 | if (!success) | |
2411 | *value = NULL; | |
2412 | } | |
2024f65a | 2413 | *type = target_type; |
02142340 VP |
2414 | if (was_ptr) |
2415 | *was_ptr = 1; | |
2024f65a VP |
2416 | } |
2417 | } | |
2418 | ||
2419 | /* The 'get_target_type' function calls check_typedef on | |
2420 | result, so we can immediately check type code. No | |
2421 | need to call check_typedef here. */ | |
2422 | } | |
2423 | ||
8b93c638 JM |
2424 | /* C */ |
2425 | static int | |
fba45db2 | 2426 | c_number_of_children (struct varobj *var) |
8b93c638 | 2427 | { |
2024f65a VP |
2428 | struct type *type = get_value_type (var); |
2429 | int children = 0; | |
8b93c638 | 2430 | struct type *target; |
8b93c638 | 2431 | |
02142340 | 2432 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 | 2433 | target = get_target_type (type); |
8b93c638 JM |
2434 | |
2435 | switch (TYPE_CODE (type)) | |
2436 | { | |
2437 | case TYPE_CODE_ARRAY: | |
2438 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
d78df370 | 2439 | && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
8b93c638 JM |
2440 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
2441 | else | |
74a44383 DJ |
2442 | /* If we don't know how many elements there are, don't display |
2443 | any. */ | |
2444 | children = 0; | |
8b93c638 JM |
2445 | break; |
2446 | ||
2447 | case TYPE_CODE_STRUCT: | |
2448 | case TYPE_CODE_UNION: | |
2449 | children = TYPE_NFIELDS (type); | |
2450 | break; | |
2451 | ||
2452 | case TYPE_CODE_PTR: | |
2024f65a VP |
2453 | /* The type here is a pointer to non-struct. Typically, pointers |
2454 | have one child, except for function ptrs, which have no children, | |
2455 | and except for void*, as we don't know what to show. | |
2456 | ||
0755e6c1 FN |
2457 | We can show char* so we allow it to be dereferenced. If you decide |
2458 | to test for it, please mind that a little magic is necessary to | |
2459 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
2460 | TYPE_NAME == "char" */ | |
2024f65a VP |
2461 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
2462 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
2463 | children = 0; | |
2464 | else | |
2465 | children = 1; | |
8b93c638 JM |
2466 | break; |
2467 | ||
2468 | default: | |
2469 | /* Other types have no children */ | |
2470 | break; | |
2471 | } | |
2472 | ||
2473 | return children; | |
2474 | } | |
2475 | ||
2476 | static char * | |
fba45db2 | 2477 | c_name_of_variable (struct varobj *parent) |
8b93c638 | 2478 | { |
1b36a34b | 2479 | return xstrdup (parent->name); |
8b93c638 JM |
2480 | } |
2481 | ||
bbec2603 VP |
2482 | /* Return the value of element TYPE_INDEX of a structure |
2483 | value VALUE. VALUE's type should be a structure, | |
2484 | or union, or a typedef to struct/union. | |
2485 | ||
2486 | Returns NULL if getting the value fails. Never throws. */ | |
2487 | static struct value * | |
2488 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 2489 | { |
bbec2603 VP |
2490 | struct value *result = NULL; |
2491 | volatile struct gdb_exception e; | |
8b93c638 | 2492 | |
bbec2603 VP |
2493 | struct type *type = value_type (value); |
2494 | type = check_typedef (type); | |
2495 | ||
2496 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2497 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 2498 | |
bbec2603 VP |
2499 | TRY_CATCH (e, RETURN_MASK_ERROR) |
2500 | { | |
d6a843b5 | 2501 | if (field_is_static (&TYPE_FIELD (type, type_index))) |
bbec2603 VP |
2502 | result = value_static_field (type, type_index); |
2503 | else | |
2504 | result = value_primitive_field (value, 0, type_index, type); | |
2505 | } | |
2506 | if (e.reason < 0) | |
2507 | { | |
2508 | return NULL; | |
2509 | } | |
2510 | else | |
2511 | { | |
2512 | return result; | |
2513 | } | |
2514 | } | |
2515 | ||
2516 | /* Obtain the information about child INDEX of the variable | |
2517 | object PARENT. | |
2518 | If CNAME is not null, sets *CNAME to the name of the child relative | |
2519 | to the parent. | |
2520 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
2521 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
2522 | ||
2523 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
2524 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
2525 | to NULL. */ | |
2526 | static void | |
2527 | c_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2528 | char **cname, struct value **cvalue, struct type **ctype, |
2529 | char **cfull_expression) | |
bbec2603 VP |
2530 | { |
2531 | struct value *value = parent->value; | |
2024f65a | 2532 | struct type *type = get_value_type (parent); |
02142340 VP |
2533 | char *parent_expression = NULL; |
2534 | int was_ptr; | |
bbec2603 VP |
2535 | |
2536 | if (cname) | |
2537 | *cname = NULL; | |
2538 | if (cvalue) | |
2539 | *cvalue = NULL; | |
2540 | if (ctype) | |
2541 | *ctype = NULL; | |
02142340 VP |
2542 | if (cfull_expression) |
2543 | { | |
2544 | *cfull_expression = NULL; | |
2545 | parent_expression = varobj_get_path_expr (parent); | |
2546 | } | |
2547 | adjust_value_for_child_access (&value, &type, &was_ptr); | |
bbec2603 | 2548 | |
8b93c638 JM |
2549 | switch (TYPE_CODE (type)) |
2550 | { | |
2551 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
2552 | if (cname) |
2553 | *cname = xstrprintf ("%d", index | |
2554 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2555 | ||
2556 | if (cvalue && value) | |
2557 | { | |
2558 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
2497b498 | 2559 | gdb_value_subscript (value, real_index, cvalue); |
bbec2603 VP |
2560 | } |
2561 | ||
2562 | if (ctype) | |
2563 | *ctype = get_target_type (type); | |
2564 | ||
02142340 VP |
2565 | if (cfull_expression) |
2566 | *cfull_expression = xstrprintf ("(%s)[%d]", parent_expression, | |
2567 | index | |
2568 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2569 | ||
2570 | ||
8b93c638 JM |
2571 | break; |
2572 | ||
2573 | case TYPE_CODE_STRUCT: | |
2574 | case TYPE_CODE_UNION: | |
bbec2603 | 2575 | if (cname) |
1b36a34b | 2576 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); |
bbec2603 VP |
2577 | |
2578 | if (cvalue && value) | |
2579 | { | |
2580 | /* For C, varobj index is the same as type index. */ | |
2581 | *cvalue = value_struct_element_index (value, index); | |
2582 | } | |
2583 | ||
2584 | if (ctype) | |
2585 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2586 | ||
02142340 VP |
2587 | if (cfull_expression) |
2588 | { | |
2589 | char *join = was_ptr ? "->" : "."; | |
2590 | *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, join, | |
2591 | TYPE_FIELD_NAME (type, index)); | |
2592 | } | |
2593 | ||
8b93c638 JM |
2594 | break; |
2595 | ||
2596 | case TYPE_CODE_PTR: | |
bbec2603 VP |
2597 | if (cname) |
2598 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 2599 | |
bbec2603 | 2600 | if (cvalue && value) |
3f4178d6 DJ |
2601 | { |
2602 | int success = gdb_value_ind (value, cvalue); | |
2603 | if (!success) | |
2604 | *cvalue = NULL; | |
2605 | } | |
bbec2603 | 2606 | |
2024f65a VP |
2607 | /* Don't use get_target_type because it calls |
2608 | check_typedef and here, we want to show the true | |
2609 | declared type of the variable. */ | |
bbec2603 | 2610 | if (ctype) |
2024f65a | 2611 | *ctype = TYPE_TARGET_TYPE (type); |
02142340 VP |
2612 | |
2613 | if (cfull_expression) | |
2614 | *cfull_expression = xstrprintf ("*(%s)", parent_expression); | |
bbec2603 | 2615 | |
8b93c638 JM |
2616 | break; |
2617 | ||
2618 | default: | |
2619 | /* This should not happen */ | |
bbec2603 VP |
2620 | if (cname) |
2621 | *cname = xstrdup ("???"); | |
02142340 VP |
2622 | if (cfull_expression) |
2623 | *cfull_expression = xstrdup ("???"); | |
bbec2603 | 2624 | /* Don't set value and type, we don't know then. */ |
8b93c638 | 2625 | } |
bbec2603 | 2626 | } |
8b93c638 | 2627 | |
bbec2603 VP |
2628 | static char * |
2629 | c_name_of_child (struct varobj *parent, int index) | |
2630 | { | |
2631 | char *name; | |
02142340 | 2632 | c_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2633 | return name; |
2634 | } | |
2635 | ||
02142340 VP |
2636 | static char * |
2637 | c_path_expr_of_child (struct varobj *child) | |
2638 | { | |
2639 | c_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2640 | &child->path_expr); | |
2641 | return child->path_expr; | |
2642 | } | |
2643 | ||
c5b48eac VP |
2644 | /* If frame associated with VAR can be found, switch |
2645 | to it and return 1. Otherwise, return 0. */ | |
2646 | static int | |
2647 | check_scope (struct varobj *var) | |
2648 | { | |
2649 | struct frame_info *fi; | |
2650 | int scope; | |
2651 | ||
2652 | fi = frame_find_by_id (var->root->frame); | |
2653 | scope = fi != NULL; | |
2654 | ||
2655 | if (fi) | |
2656 | { | |
2657 | CORE_ADDR pc = get_frame_pc (fi); | |
2658 | if (pc < BLOCK_START (var->root->valid_block) || | |
2659 | pc >= BLOCK_END (var->root->valid_block)) | |
2660 | scope = 0; | |
2661 | else | |
2662 | select_frame (fi); | |
2663 | } | |
2664 | return scope; | |
2665 | } | |
2666 | ||
30b28db1 | 2667 | static struct value * |
fba45db2 | 2668 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 2669 | { |
5e572bb4 | 2670 | struct value *new_val = NULL; |
73a93a32 | 2671 | struct varobj *var = *var_handle; |
8b93c638 | 2672 | struct frame_info *fi; |
c5b48eac | 2673 | int within_scope = 0; |
6208b47d VP |
2674 | struct cleanup *back_to; |
2675 | ||
73a93a32 | 2676 | /* Only root variables can be updated... */ |
b2c2bd75 | 2677 | if (!is_root_p (var)) |
73a93a32 JI |
2678 | /* Not a root var */ |
2679 | return NULL; | |
2680 | ||
4f8d22e3 | 2681 | back_to = make_cleanup_restore_current_thread (); |
72330bd6 | 2682 | |
8b93c638 | 2683 | /* Determine whether the variable is still around. */ |
a5defcdc | 2684 | if (var->root->valid_block == NULL || var->root->floating) |
8b93c638 | 2685 | within_scope = 1; |
c5b48eac VP |
2686 | else if (var->root->thread_id == 0) |
2687 | { | |
2688 | /* The program was single-threaded when the variable object was | |
2689 | created. Technically, it's possible that the program became | |
2690 | multi-threaded since then, but we don't support such | |
2691 | scenario yet. */ | |
2692 | within_scope = check_scope (var); | |
2693 | } | |
8b93c638 JM |
2694 | else |
2695 | { | |
c5b48eac VP |
2696 | ptid_t ptid = thread_id_to_pid (var->root->thread_id); |
2697 | if (in_thread_list (ptid)) | |
d2353924 | 2698 | { |
c5b48eac VP |
2699 | switch_to_thread (ptid); |
2700 | within_scope = check_scope (var); | |
2701 | } | |
8b93c638 | 2702 | } |
72330bd6 | 2703 | |
8b93c638 JM |
2704 | if (within_scope) |
2705 | { | |
73a93a32 | 2706 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
2707 | expression fails we want to just return NULL. */ |
2708 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
2709 | return new_val; |
2710 | } | |
2711 | ||
6208b47d VP |
2712 | do_cleanups (back_to); |
2713 | ||
8b93c638 JM |
2714 | return NULL; |
2715 | } | |
2716 | ||
30b28db1 | 2717 | static struct value * |
fba45db2 | 2718 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2719 | { |
bbec2603 | 2720 | struct value *value = NULL; |
02142340 | 2721 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2722 | |
2723 | return value; | |
2724 | } | |
2725 | ||
2726 | static struct type * | |
fba45db2 | 2727 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2728 | { |
bbec2603 | 2729 | struct type *type = NULL; |
02142340 | 2730 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2731 | return type; |
2732 | } | |
2733 | ||
8b93c638 | 2734 | static char * |
de051565 | 2735 | c_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2736 | { |
14b3d9c9 JB |
2737 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2738 | it will print out its children instead of "{...}". So we need to | |
2739 | catch that case explicitly. */ | |
2740 | struct type *type = get_type (var); | |
e64d9b3d | 2741 | |
b6313243 TT |
2742 | /* If we have a custom formatter, return whatever string it has |
2743 | produced. */ | |
2744 | if (var->pretty_printer && var->print_value) | |
2745 | return xstrdup (var->print_value); | |
2746 | ||
14b3d9c9 JB |
2747 | /* Strip top-level references. */ |
2748 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2749 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2750 | ||
2751 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2752 | { |
2753 | case TYPE_CODE_STRUCT: | |
2754 | case TYPE_CODE_UNION: | |
2755 | return xstrdup ("{...}"); | |
2756 | /* break; */ | |
2757 | ||
2758 | case TYPE_CODE_ARRAY: | |
2759 | { | |
e64d9b3d | 2760 | char *number; |
b435e160 | 2761 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2762 | return (number); |
8b93c638 JM |
2763 | } |
2764 | /* break; */ | |
2765 | ||
2766 | default: | |
2767 | { | |
575bbeb6 KS |
2768 | if (var->value == NULL) |
2769 | { | |
2770 | /* This can happen if we attempt to get the value of a struct | |
2771 | member when the parent is an invalid pointer. This is an | |
2772 | error condition, so we should tell the caller. */ | |
2773 | return NULL; | |
2774 | } | |
2775 | else | |
2776 | { | |
25d5ea92 VP |
2777 | if (var->not_fetched && value_lazy (var->value)) |
2778 | /* Frozen variable and no value yet. We don't | |
2779 | implicitly fetch the value. MI response will | |
2780 | use empty string for the value, which is OK. */ | |
2781 | return NULL; | |
2782 | ||
b2c2bd75 | 2783 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2784 | gdb_assert (!value_lazy (var->value)); |
de051565 MK |
2785 | |
2786 | /* If the specified format is the current one, | |
2787 | we can reuse print_value */ | |
2788 | if (format == var->format) | |
2789 | return xstrdup (var->print_value); | |
2790 | else | |
b6313243 TT |
2791 | return value_get_print_value (var->value, format, |
2792 | var->pretty_printer); | |
85265413 | 2793 | } |
e64d9b3d | 2794 | } |
8b93c638 JM |
2795 | } |
2796 | } | |
2797 | \f | |
2798 | ||
2799 | /* C++ */ | |
2800 | ||
2801 | static int | |
fba45db2 | 2802 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2803 | { |
2804 | struct type *type; | |
2805 | int children, dont_know; | |
2806 | ||
2807 | dont_know = 1; | |
2808 | children = 0; | |
2809 | ||
2810 | if (!CPLUS_FAKE_CHILD (var)) | |
2811 | { | |
2024f65a | 2812 | type = get_value_type (var); |
02142340 | 2813 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2814 | |
2815 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2816 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2817 | { |
2818 | int kids[3]; | |
2819 | ||
2820 | cplus_class_num_children (type, kids); | |
2821 | if (kids[v_public] != 0) | |
2822 | children++; | |
2823 | if (kids[v_private] != 0) | |
2824 | children++; | |
2825 | if (kids[v_protected] != 0) | |
2826 | children++; | |
2827 | ||
2828 | /* Add any baseclasses */ | |
2829 | children += TYPE_N_BASECLASSES (type); | |
2830 | dont_know = 0; | |
2831 | ||
2832 | /* FIXME: save children in var */ | |
2833 | } | |
2834 | } | |
2835 | else | |
2836 | { | |
2837 | int kids[3]; | |
2838 | ||
2024f65a | 2839 | type = get_value_type (var->parent); |
02142340 | 2840 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2841 | |
2842 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2843 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2844 | children = kids[v_public]; |
6e382aa3 | 2845 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2846 | children = kids[v_private]; |
2847 | else | |
2848 | children = kids[v_protected]; | |
2849 | dont_know = 0; | |
2850 | } | |
2851 | ||
2852 | if (dont_know) | |
2853 | children = c_number_of_children (var); | |
2854 | ||
2855 | return children; | |
2856 | } | |
2857 | ||
2858 | /* Compute # of public, private, and protected variables in this class. | |
2859 | That means we need to descend into all baseclasses and find out | |
2860 | how many are there, too. */ | |
2861 | static void | |
1669605f | 2862 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2863 | { |
2864 | int i; | |
2865 | ||
2866 | children[v_public] = 0; | |
2867 | children[v_private] = 0; | |
2868 | children[v_protected] = 0; | |
2869 | ||
2870 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2871 | { | |
2872 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2873 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2874 | continue; |
2875 | ||
2876 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2877 | children[v_protected]++; | |
2878 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2879 | children[v_private]++; | |
2880 | else | |
2881 | children[v_public]++; | |
2882 | } | |
2883 | } | |
2884 | ||
2885 | static char * | |
fba45db2 | 2886 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2887 | { |
2888 | return c_name_of_variable (parent); | |
2889 | } | |
2890 | ||
2024f65a VP |
2891 | enum accessibility { private_field, protected_field, public_field }; |
2892 | ||
2893 | /* Check if field INDEX of TYPE has the specified accessibility. | |
2894 | Return 0 if so and 1 otherwise. */ | |
2895 | static int | |
2896 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 2897 | { |
2024f65a VP |
2898 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
2899 | return 1; | |
2900 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
2901 | return 1; | |
2902 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
2903 | && !TYPE_FIELD_PROTECTED (type, index)) | |
2904 | return 1; | |
2905 | else | |
2906 | return 0; | |
2907 | } | |
2908 | ||
2909 | static void | |
2910 | cplus_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2911 | char **cname, struct value **cvalue, struct type **ctype, |
2912 | char **cfull_expression) | |
2024f65a | 2913 | { |
348144ba | 2914 | char *name = NULL; |
2024f65a | 2915 | struct value *value; |
8b93c638 | 2916 | struct type *type; |
02142340 VP |
2917 | int was_ptr; |
2918 | char *parent_expression = NULL; | |
8b93c638 | 2919 | |
2024f65a VP |
2920 | if (cname) |
2921 | *cname = NULL; | |
2922 | if (cvalue) | |
2923 | *cvalue = NULL; | |
2924 | if (ctype) | |
2925 | *ctype = NULL; | |
02142340 VP |
2926 | if (cfull_expression) |
2927 | *cfull_expression = NULL; | |
2024f65a | 2928 | |
8b93c638 JM |
2929 | if (CPLUS_FAKE_CHILD (parent)) |
2930 | { | |
2024f65a VP |
2931 | value = parent->parent->value; |
2932 | type = get_value_type (parent->parent); | |
02142340 VP |
2933 | if (cfull_expression) |
2934 | parent_expression = varobj_get_path_expr (parent->parent); | |
8b93c638 JM |
2935 | } |
2936 | else | |
2024f65a VP |
2937 | { |
2938 | value = parent->value; | |
2939 | type = get_value_type (parent); | |
02142340 VP |
2940 | if (cfull_expression) |
2941 | parent_expression = varobj_get_path_expr (parent); | |
2024f65a | 2942 | } |
8b93c638 | 2943 | |
02142340 | 2944 | adjust_value_for_child_access (&value, &type, &was_ptr); |
2024f65a VP |
2945 | |
2946 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
3f4178d6 | 2947 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
8b93c638 | 2948 | { |
02142340 | 2949 | char *join = was_ptr ? "->" : "."; |
8b93c638 JM |
2950 | if (CPLUS_FAKE_CHILD (parent)) |
2951 | { | |
6e382aa3 JJ |
2952 | /* The fields of the class type are ordered as they |
2953 | appear in the class. We are given an index for a | |
2954 | particular access control type ("public","protected", | |
2955 | or "private"). We must skip over fields that don't | |
2956 | have the access control we are looking for to properly | |
2957 | find the indexed field. */ | |
2958 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 2959 | enum accessibility acc = public_field; |
6e382aa3 | 2960 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 2961 | acc = private_field; |
6e382aa3 | 2962 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
2963 | acc = protected_field; |
2964 | ||
2965 | while (index >= 0) | |
6e382aa3 | 2966 | { |
2024f65a VP |
2967 | if (TYPE_VPTR_BASETYPE (type) == type |
2968 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2969 | ; /* ignore vptr */ | |
2970 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
2971 | --index; |
2972 | ++type_index; | |
6e382aa3 | 2973 | } |
2024f65a VP |
2974 | --type_index; |
2975 | ||
2976 | if (cname) | |
2977 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
2978 | ||
2979 | if (cvalue && value) | |
2980 | *cvalue = value_struct_element_index (value, type_index); | |
2981 | ||
2982 | if (ctype) | |
2983 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
02142340 VP |
2984 | |
2985 | if (cfull_expression) | |
2986 | *cfull_expression = xstrprintf ("((%s)%s%s)", parent_expression, | |
2987 | join, | |
2988 | TYPE_FIELD_NAME (type, type_index)); | |
2024f65a VP |
2989 | } |
2990 | else if (index < TYPE_N_BASECLASSES (type)) | |
2991 | { | |
2992 | /* This is a baseclass. */ | |
2993 | if (cname) | |
2994 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
2995 | ||
2996 | if (cvalue && value) | |
6e382aa3 | 2997 | { |
2024f65a | 2998 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
02142340 | 2999 | release_value (*cvalue); |
6e382aa3 JJ |
3000 | } |
3001 | ||
2024f65a VP |
3002 | if (ctype) |
3003 | { | |
3004 | *ctype = TYPE_FIELD_TYPE (type, index); | |
3005 | } | |
02142340 VP |
3006 | |
3007 | if (cfull_expression) | |
3008 | { | |
3009 | char *ptr = was_ptr ? "*" : ""; | |
3010 | /* Cast the parent to the base' type. Note that in gdb, | |
3011 | expression like | |
3012 | (Base1)d | |
3013 | will create an lvalue, for all appearences, so we don't | |
3014 | need to use more fancy: | |
3015 | *(Base1*)(&d) | |
3016 | construct. */ | |
3017 | *cfull_expression = xstrprintf ("(%s(%s%s) %s)", | |
3018 | ptr, | |
3019 | TYPE_FIELD_NAME (type, index), | |
3020 | ptr, | |
3021 | parent_expression); | |
3022 | } | |
8b93c638 | 3023 | } |
8b93c638 JM |
3024 | else |
3025 | { | |
348144ba | 3026 | char *access = NULL; |
6e382aa3 | 3027 | int children[3]; |
2024f65a | 3028 | cplus_class_num_children (type, children); |
6e382aa3 | 3029 | |
8b93c638 | 3030 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
3031 | only be "public", "private", or "protected" |
3032 | ||
3033 | The special "fake" children are always output by varobj in | |
3034 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
3035 | index -= TYPE_N_BASECLASSES (type); |
3036 | switch (index) | |
3037 | { | |
3038 | case 0: | |
6e382aa3 | 3039 | if (children[v_public] > 0) |
2024f65a | 3040 | access = "public"; |
6e382aa3 | 3041 | else if (children[v_private] > 0) |
2024f65a | 3042 | access = "private"; |
6e382aa3 | 3043 | else |
2024f65a | 3044 | access = "protected"; |
6e382aa3 | 3045 | break; |
8b93c638 | 3046 | case 1: |
6e382aa3 | 3047 | if (children[v_public] > 0) |
8b93c638 | 3048 | { |
6e382aa3 | 3049 | if (children[v_private] > 0) |
2024f65a | 3050 | access = "private"; |
6e382aa3 | 3051 | else |
2024f65a | 3052 | access = "protected"; |
8b93c638 | 3053 | } |
6e382aa3 | 3054 | else if (children[v_private] > 0) |
2024f65a | 3055 | access = "protected"; |
6e382aa3 | 3056 | break; |
8b93c638 | 3057 | case 2: |
6e382aa3 | 3058 | /* Must be protected */ |
2024f65a | 3059 | access = "protected"; |
6e382aa3 | 3060 | break; |
8b93c638 JM |
3061 | default: |
3062 | /* error! */ | |
3063 | break; | |
3064 | } | |
348144ba MS |
3065 | |
3066 | gdb_assert (access); | |
2024f65a VP |
3067 | if (cname) |
3068 | *cname = xstrdup (access); | |
8b93c638 | 3069 | |
02142340 | 3070 | /* Value and type and full expression are null here. */ |
2024f65a | 3071 | } |
8b93c638 | 3072 | } |
8b93c638 JM |
3073 | else |
3074 | { | |
02142340 | 3075 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
2024f65a VP |
3076 | } |
3077 | } | |
8b93c638 | 3078 | |
2024f65a VP |
3079 | static char * |
3080 | cplus_name_of_child (struct varobj *parent, int index) | |
3081 | { | |
3082 | char *name = NULL; | |
02142340 | 3083 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
3084 | return name; |
3085 | } | |
3086 | ||
02142340 VP |
3087 | static char * |
3088 | cplus_path_expr_of_child (struct varobj *child) | |
3089 | { | |
3090 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
3091 | &child->path_expr); | |
3092 | return child->path_expr; | |
3093 | } | |
3094 | ||
30b28db1 | 3095 | static struct value * |
fba45db2 | 3096 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 3097 | { |
73a93a32 | 3098 | return c_value_of_root (var_handle); |
8b93c638 JM |
3099 | } |
3100 | ||
30b28db1 | 3101 | static struct value * |
fba45db2 | 3102 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 3103 | { |
2024f65a | 3104 | struct value *value = NULL; |
02142340 | 3105 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
3106 | return value; |
3107 | } | |
3108 | ||
3109 | static struct type * | |
fba45db2 | 3110 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 3111 | { |
2024f65a | 3112 | struct type *type = NULL; |
02142340 | 3113 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
3114 | return type; |
3115 | } | |
3116 | ||
8b93c638 | 3117 | static char * |
de051565 | 3118 | cplus_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 JM |
3119 | { |
3120 | ||
3121 | /* If we have one of our special types, don't print out | |
3122 | any value. */ | |
3123 | if (CPLUS_FAKE_CHILD (var)) | |
3124 | return xstrdup (""); | |
3125 | ||
de051565 | 3126 | return c_value_of_variable (var, format); |
8b93c638 JM |
3127 | } |
3128 | \f | |
3129 | /* Java */ | |
3130 | ||
3131 | static int | |
fba45db2 | 3132 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
3133 | { |
3134 | return cplus_number_of_children (var); | |
3135 | } | |
3136 | ||
3137 | static char * | |
fba45db2 | 3138 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
3139 | { |
3140 | char *p, *name; | |
3141 | ||
3142 | name = cplus_name_of_variable (parent); | |
3143 | /* If the name has "-" in it, it is because we | |
3144 | needed to escape periods in the name... */ | |
3145 | p = name; | |
3146 | ||
3147 | while (*p != '\000') | |
3148 | { | |
3149 | if (*p == '-') | |
3150 | *p = '.'; | |
3151 | p++; | |
3152 | } | |
3153 | ||
3154 | return name; | |
3155 | } | |
3156 | ||
3157 | static char * | |
fba45db2 | 3158 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3159 | { |
3160 | char *name, *p; | |
3161 | ||
3162 | name = cplus_name_of_child (parent, index); | |
3163 | /* Escape any periods in the name... */ | |
3164 | p = name; | |
3165 | ||
3166 | while (*p != '\000') | |
3167 | { | |
3168 | if (*p == '.') | |
3169 | *p = '-'; | |
3170 | p++; | |
3171 | } | |
3172 | ||
3173 | return name; | |
3174 | } | |
3175 | ||
02142340 VP |
3176 | static char * |
3177 | java_path_expr_of_child (struct varobj *child) | |
3178 | { | |
3179 | return NULL; | |
3180 | } | |
3181 | ||
30b28db1 | 3182 | static struct value * |
fba45db2 | 3183 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 3184 | { |
73a93a32 | 3185 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
3186 | } |
3187 | ||
30b28db1 | 3188 | static struct value * |
fba45db2 | 3189 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3190 | { |
3191 | return cplus_value_of_child (parent, index); | |
3192 | } | |
3193 | ||
3194 | static struct type * | |
fba45db2 | 3195 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3196 | { |
3197 | return cplus_type_of_child (parent, index); | |
3198 | } | |
3199 | ||
8b93c638 | 3200 | static char * |
de051565 | 3201 | java_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 3202 | { |
de051565 | 3203 | return cplus_value_of_variable (var, format); |
8b93c638 JM |
3204 | } |
3205 | \f | |
3206 | extern void _initialize_varobj (void); | |
3207 | void | |
3208 | _initialize_varobj (void) | |
3209 | { | |
3210 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
3211 | ||
3212 | varobj_table = xmalloc (sizeof_table); | |
3213 | memset (varobj_table, 0, sizeof_table); | |
3214 | ||
85c07804 AC |
3215 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
3216 | &varobjdebug, _("\ | |
3217 | Set varobj debugging."), _("\ | |
3218 | Show varobj debugging."), _("\ | |
3219 | When non-zero, varobj debugging is enabled."), | |
3220 | NULL, | |
920d2a44 | 3221 | show_varobjdebug, |
85c07804 | 3222 | &setlist, &showlist); |
8b93c638 | 3223 | } |
8756216b DP |
3224 | |
3225 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
3226 | are defined on globals. | |
3227 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2dbd25e5 | 3228 | |
8756216b DP |
3229 | void |
3230 | varobj_invalidate (void) | |
3231 | { | |
3232 | struct varobj **all_rootvarobj; | |
3233 | struct varobj **varp; | |
3234 | ||
3235 | if (varobj_list (&all_rootvarobj) > 0) | |
2dbd25e5 JK |
3236 | { |
3237 | varp = all_rootvarobj; | |
3238 | while (*varp != NULL) | |
3239 | { | |
3240 | /* Floating varobjs are reparsed on each stop, so we don't care if | |
f4a34a08 JK |
3241 | the presently parsed expression refers to something that's gone. |
3242 | */ | |
2dbd25e5 JK |
3243 | if ((*varp)->root->floating) |
3244 | continue; | |
3245 | ||
3246 | /* global var must be re-evaluated. */ | |
3247 | if ((*varp)->root->valid_block == NULL) | |
3248 | { | |
3249 | struct varobj *tmp_var; | |
3250 | ||
f4a34a08 JK |
3251 | /* Try to create a varobj with same expression. If we succeed |
3252 | replace the old varobj, otherwise invalidate it. */ | |
3253 | tmp_var = varobj_create (NULL, (*varp)->name, (CORE_ADDR) 0, | |
3254 | USE_CURRENT_FRAME); | |
2dbd25e5 JK |
3255 | if (tmp_var != NULL) |
3256 | { | |
3257 | tmp_var->obj_name = xstrdup ((*varp)->obj_name); | |
3258 | varobj_delete (*varp, NULL, 0); | |
3259 | install_variable (tmp_var); | |
3260 | } | |
3261 | else | |
3262 | (*varp)->root->is_valid = 0; | |
3263 | } | |
3264 | else /* locals must be invalidated. */ | |
3265 | (*varp)->root->is_valid = 0; | |
3266 | ||
3267 | varp++; | |
3268 | } | |
3269 | } | |
f7545552 | 3270 | xfree (all_rootvarobj); |
8756216b DP |
3271 | return; |
3272 | } |