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" | |
1a4300e9 | 37 | #include "typeprint.h" |
8b93c638 | 38 | |
b6313243 TT |
39 | #if HAVE_PYTHON |
40 | #include "python/python.h" | |
41 | #include "python/python-internal.h" | |
42 | #else | |
43 | typedef int PyObject; | |
44 | #endif | |
45 | ||
8b93c638 JM |
46 | /* Non-zero if we want to see trace of varobj level stuff. */ |
47 | ||
48 | int varobjdebug = 0; | |
920d2a44 AC |
49 | static void |
50 | show_varobjdebug (struct ui_file *file, int from_tty, | |
51 | struct cmd_list_element *c, const char *value) | |
52 | { | |
53 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
54 | } | |
8b93c638 JM |
55 | |
56 | /* String representations of gdb's format codes */ | |
57 | char *varobj_format_string[] = | |
72330bd6 | 58 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
59 | |
60 | /* String representations of gdb's known languages */ | |
72330bd6 | 61 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
62 | |
63 | /* Data structures */ | |
64 | ||
65 | /* Every root variable has one of these structures saved in its | |
66 | varobj. Members which must be free'd are noted. */ | |
67 | struct varobj_root | |
72330bd6 | 68 | { |
8b93c638 | 69 | |
72330bd6 AC |
70 | /* Alloc'd expression for this parent. */ |
71 | struct expression *exp; | |
8b93c638 | 72 | |
72330bd6 AC |
73 | /* Block for which this expression is valid */ |
74 | struct block *valid_block; | |
8b93c638 | 75 | |
44a67aa7 VP |
76 | /* The frame for this expression. This field is set iff valid_block is |
77 | not NULL. */ | |
e64d9b3d | 78 | struct frame_id frame; |
8b93c638 | 79 | |
c5b48eac VP |
80 | /* The thread ID that this varobj_root belong to. This field |
81 | is only valid if valid_block is not NULL. | |
82 | When not 0, indicates which thread 'frame' belongs to. | |
83 | When 0, indicates that the thread list was empty when the varobj_root | |
84 | was created. */ | |
85 | int thread_id; | |
86 | ||
a5defcdc VP |
87 | /* If 1, the -var-update always recomputes the value in the |
88 | current thread and frame. Otherwise, variable object is | |
89 | always updated in the specific scope/thread/frame */ | |
90 | int floating; | |
73a93a32 | 91 | |
8756216b DP |
92 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
93 | to symbols that do not exist anymore. */ | |
94 | int is_valid; | |
95 | ||
72330bd6 AC |
96 | /* Language info for this variable and its children */ |
97 | struct language_specific *lang; | |
8b93c638 | 98 | |
72330bd6 AC |
99 | /* The varobj for this root node. */ |
100 | struct varobj *rootvar; | |
8b93c638 | 101 | |
72330bd6 AC |
102 | /* Next root variable */ |
103 | struct varobj_root *next; | |
104 | }; | |
8b93c638 JM |
105 | |
106 | /* Every variable in the system has a structure of this type defined | |
107 | for it. This structure holds all information necessary to manipulate | |
108 | a particular object variable. Members which must be freed are noted. */ | |
109 | struct varobj | |
72330bd6 | 110 | { |
8b93c638 | 111 | |
72330bd6 AC |
112 | /* Alloc'd name of the variable for this object.. If this variable is a |
113 | child, then this name will be the child's source name. | |
114 | (bar, not foo.bar) */ | |
115 | /* NOTE: This is the "expression" */ | |
116 | char *name; | |
8b93c638 | 117 | |
02142340 VP |
118 | /* Alloc'd expression for this child. Can be used to create a |
119 | root variable corresponding to this child. */ | |
120 | char *path_expr; | |
121 | ||
72330bd6 AC |
122 | /* The alloc'd name for this variable's object. This is here for |
123 | convenience when constructing this object's children. */ | |
124 | char *obj_name; | |
8b93c638 | 125 | |
72330bd6 AC |
126 | /* Index of this variable in its parent or -1 */ |
127 | int index; | |
8b93c638 | 128 | |
202ddcaa VP |
129 | /* The type of this variable. This can be NULL |
130 | for artifial variable objects -- currently, the "accessibility" | |
131 | variable objects in C++. */ | |
72330bd6 | 132 | struct type *type; |
8b93c638 | 133 | |
b20d8971 VP |
134 | /* The value of this expression or subexpression. A NULL value |
135 | indicates there was an error getting this value. | |
b2c2bd75 VP |
136 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
137 | the value is either NULL, or not lazy. */ | |
30b28db1 | 138 | struct value *value; |
8b93c638 | 139 | |
72330bd6 AC |
140 | /* The number of (immediate) children this variable has */ |
141 | int num_children; | |
8b93c638 | 142 | |
72330bd6 AC |
143 | /* If this object is a child, this points to its immediate parent. */ |
144 | struct varobj *parent; | |
8b93c638 | 145 | |
28335dcc VP |
146 | /* Children of this object. */ |
147 | VEC (varobj_p) *children; | |
8b93c638 | 148 | |
b6313243 TT |
149 | /* Whether the children of this varobj were requested. This field is |
150 | used to decide if dynamic varobj should recompute their children. | |
151 | In the event that the frontend never asked for the children, we | |
152 | can avoid that. */ | |
153 | int children_requested; | |
154 | ||
72330bd6 AC |
155 | /* Description of the root variable. Points to root variable for children. */ |
156 | struct varobj_root *root; | |
8b93c638 | 157 | |
72330bd6 AC |
158 | /* The format of the output for this object */ |
159 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
160 | |
161 | /* Was this variable updated via a varobj_set_value operation */ | |
162 | int updated; | |
85265413 NR |
163 | |
164 | /* Last print value. */ | |
165 | char *print_value; | |
25d5ea92 VP |
166 | |
167 | /* Is this variable frozen. Frozen variables are never implicitly | |
168 | updated by -var-update * | |
169 | or -var-update <direct-or-indirect-parent>. */ | |
170 | int frozen; | |
171 | ||
172 | /* Is the value of this variable intentionally not fetched? It is | |
173 | not fetched if either the variable is frozen, or any parents is | |
174 | frozen. */ | |
175 | int not_fetched; | |
b6313243 TT |
176 | |
177 | /* The pretty-printer that has been constructed. If NULL, then a | |
178 | new printer object is needed, and one will be constructed. */ | |
179 | PyObject *pretty_printer; | |
72330bd6 | 180 | }; |
8b93c638 | 181 | |
8b93c638 | 182 | struct cpstack |
72330bd6 AC |
183 | { |
184 | char *name; | |
185 | struct cpstack *next; | |
186 | }; | |
8b93c638 JM |
187 | |
188 | /* A list of varobjs */ | |
189 | ||
190 | struct vlist | |
72330bd6 AC |
191 | { |
192 | struct varobj *var; | |
193 | struct vlist *next; | |
194 | }; | |
8b93c638 JM |
195 | |
196 | /* Private function prototypes */ | |
197 | ||
198 | /* Helper functions for the above subcommands. */ | |
199 | ||
a14ed312 | 200 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 201 | |
a14ed312 KB |
202 | static void delete_variable_1 (struct cpstack **, int *, |
203 | struct varobj *, int, int); | |
8b93c638 | 204 | |
a14ed312 | 205 | static int install_variable (struct varobj *); |
8b93c638 | 206 | |
a14ed312 | 207 | static void uninstall_variable (struct varobj *); |
8b93c638 | 208 | |
a14ed312 | 209 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 210 | |
b6313243 TT |
211 | static struct varobj * |
212 | create_child_with_value (struct varobj *parent, int index, const char *name, | |
213 | struct value *value); | |
214 | ||
8b93c638 JM |
215 | /* Utility routines */ |
216 | ||
a14ed312 | 217 | static struct varobj *new_variable (void); |
8b93c638 | 218 | |
a14ed312 | 219 | static struct varobj *new_root_variable (void); |
8b93c638 | 220 | |
a14ed312 | 221 | static void free_variable (struct varobj *var); |
8b93c638 | 222 | |
74b7792f AC |
223 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
224 | ||
a14ed312 | 225 | static struct type *get_type (struct varobj *var); |
8b93c638 | 226 | |
6e2a9270 VP |
227 | static struct type *get_value_type (struct varobj *var); |
228 | ||
a14ed312 | 229 | static struct type *get_target_type (struct type *); |
8b93c638 | 230 | |
a14ed312 | 231 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 232 | |
a14ed312 | 233 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 234 | |
a14ed312 | 235 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 236 | |
acd65feb VP |
237 | static int install_new_value (struct varobj *var, struct value *value, |
238 | int initial); | |
239 | ||
b6313243 TT |
240 | static void install_default_visualizer (struct varobj *var); |
241 | ||
8b93c638 JM |
242 | /* Language-specific routines. */ |
243 | ||
a14ed312 | 244 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 245 | |
a14ed312 | 246 | static int number_of_children (struct varobj *); |
8b93c638 | 247 | |
a14ed312 | 248 | static char *name_of_variable (struct varobj *); |
8b93c638 | 249 | |
a14ed312 | 250 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 251 | |
30b28db1 | 252 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 253 | |
30b28db1 | 254 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 255 | |
de051565 MK |
256 | static char *my_value_of_variable (struct varobj *var, |
257 | enum varobj_display_formats format); | |
8b93c638 | 258 | |
85265413 | 259 | static char *value_get_print_value (struct value *value, |
b6313243 TT |
260 | enum varobj_display_formats format, |
261 | PyObject *value_formatter); | |
85265413 | 262 | |
b2c2bd75 VP |
263 | static int varobj_value_is_changeable_p (struct varobj *var); |
264 | ||
265 | static int is_root_p (struct varobj *var); | |
8b93c638 | 266 | |
b6313243 TT |
267 | static struct varobj * |
268 | varobj_add_child (struct varobj *var, const char *name, struct value *value); | |
269 | ||
8b93c638 JM |
270 | /* C implementation */ |
271 | ||
a14ed312 | 272 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 273 | |
a14ed312 | 274 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 275 | |
a14ed312 | 276 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 277 | |
02142340 VP |
278 | static char *c_path_expr_of_child (struct varobj *child); |
279 | ||
30b28db1 | 280 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 281 | |
30b28db1 | 282 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 283 | |
a14ed312 | 284 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 285 | |
de051565 MK |
286 | static char *c_value_of_variable (struct varobj *var, |
287 | enum varobj_display_formats format); | |
8b93c638 JM |
288 | |
289 | /* C++ implementation */ | |
290 | ||
a14ed312 | 291 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 292 | |
a14ed312 | 293 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 294 | |
a14ed312 | 295 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 296 | |
a14ed312 | 297 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 298 | |
02142340 VP |
299 | static char *cplus_path_expr_of_child (struct varobj *child); |
300 | ||
30b28db1 | 301 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 302 | |
30b28db1 | 303 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 304 | |
a14ed312 | 305 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 306 | |
de051565 MK |
307 | static char *cplus_value_of_variable (struct varobj *var, |
308 | enum varobj_display_formats format); | |
8b93c638 JM |
309 | |
310 | /* Java implementation */ | |
311 | ||
a14ed312 | 312 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 313 | |
a14ed312 | 314 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 315 | |
a14ed312 | 316 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 317 | |
02142340 VP |
318 | static char *java_path_expr_of_child (struct varobj *child); |
319 | ||
30b28db1 | 320 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 321 | |
30b28db1 | 322 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 323 | |
a14ed312 | 324 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 325 | |
de051565 MK |
326 | static char *java_value_of_variable (struct varobj *var, |
327 | enum varobj_display_formats format); | |
8b93c638 JM |
328 | |
329 | /* The language specific vector */ | |
330 | ||
331 | struct language_specific | |
72330bd6 | 332 | { |
8b93c638 | 333 | |
72330bd6 AC |
334 | /* The language of this variable */ |
335 | enum varobj_languages language; | |
8b93c638 | 336 | |
72330bd6 AC |
337 | /* The number of children of PARENT. */ |
338 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 339 | |
72330bd6 AC |
340 | /* The name (expression) of a root varobj. */ |
341 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 342 | |
72330bd6 AC |
343 | /* The name of the INDEX'th child of PARENT. */ |
344 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 345 | |
02142340 VP |
346 | /* Returns the rooted expression of CHILD, which is a variable |
347 | obtain that has some parent. */ | |
348 | char *(*path_expr_of_child) (struct varobj * child); | |
349 | ||
30b28db1 AC |
350 | /* The ``struct value *'' of the root variable ROOT. */ |
351 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 352 | |
30b28db1 AC |
353 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
354 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 355 | |
72330bd6 AC |
356 | /* The type of the INDEX'th child of PARENT. */ |
357 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 358 | |
72330bd6 | 359 | /* The current value of VAR. */ |
de051565 MK |
360 | char *(*value_of_variable) (struct varobj * var, |
361 | enum varobj_display_formats format); | |
72330bd6 | 362 | }; |
8b93c638 JM |
363 | |
364 | /* Array of known source language routines. */ | |
d5d6fca5 | 365 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
366 | /* Unknown (try treating as C */ |
367 | { | |
72330bd6 AC |
368 | vlang_unknown, |
369 | c_number_of_children, | |
370 | c_name_of_variable, | |
371 | c_name_of_child, | |
02142340 | 372 | c_path_expr_of_child, |
72330bd6 AC |
373 | c_value_of_root, |
374 | c_value_of_child, | |
375 | c_type_of_child, | |
72330bd6 | 376 | c_value_of_variable} |
8b93c638 JM |
377 | , |
378 | /* C */ | |
379 | { | |
72330bd6 AC |
380 | vlang_c, |
381 | c_number_of_children, | |
382 | c_name_of_variable, | |
383 | c_name_of_child, | |
02142340 | 384 | c_path_expr_of_child, |
72330bd6 AC |
385 | c_value_of_root, |
386 | c_value_of_child, | |
387 | c_type_of_child, | |
72330bd6 | 388 | c_value_of_variable} |
8b93c638 JM |
389 | , |
390 | /* C++ */ | |
391 | { | |
72330bd6 AC |
392 | vlang_cplus, |
393 | cplus_number_of_children, | |
394 | cplus_name_of_variable, | |
395 | cplus_name_of_child, | |
02142340 | 396 | cplus_path_expr_of_child, |
72330bd6 AC |
397 | cplus_value_of_root, |
398 | cplus_value_of_child, | |
399 | cplus_type_of_child, | |
72330bd6 | 400 | cplus_value_of_variable} |
8b93c638 JM |
401 | , |
402 | /* Java */ | |
403 | { | |
72330bd6 AC |
404 | vlang_java, |
405 | java_number_of_children, | |
406 | java_name_of_variable, | |
407 | java_name_of_child, | |
02142340 | 408 | java_path_expr_of_child, |
72330bd6 AC |
409 | java_value_of_root, |
410 | java_value_of_child, | |
411 | java_type_of_child, | |
72330bd6 | 412 | java_value_of_variable} |
8b93c638 JM |
413 | }; |
414 | ||
415 | /* A little convenience enum for dealing with C++/Java */ | |
416 | enum vsections | |
72330bd6 AC |
417 | { |
418 | v_public = 0, v_private, v_protected | |
419 | }; | |
8b93c638 JM |
420 | |
421 | /* Private data */ | |
422 | ||
423 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 424 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
425 | |
426 | /* Header of the list of root variable objects */ | |
427 | static struct varobj_root *rootlist; | |
428 | static int rootcount = 0; /* number of root varobjs in the list */ | |
429 | ||
430 | /* Prime number indicating the number of buckets in the hash table */ | |
431 | /* A prime large enough to avoid too many colisions */ | |
432 | #define VAROBJ_TABLE_SIZE 227 | |
433 | ||
434 | /* Pointer to the varobj hash table (built at run time) */ | |
435 | static struct vlist **varobj_table; | |
436 | ||
8b93c638 JM |
437 | /* Is the variable X one of our "fake" children? */ |
438 | #define CPLUS_FAKE_CHILD(x) \ | |
439 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
440 | \f | |
441 | ||
442 | /* API Implementation */ | |
b2c2bd75 VP |
443 | static int |
444 | is_root_p (struct varobj *var) | |
445 | { | |
446 | return (var->root->rootvar == var); | |
447 | } | |
8b93c638 JM |
448 | |
449 | /* Creates a varobj (not its children) */ | |
450 | ||
7d8547c9 AC |
451 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
452 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
453 | ||
454 | static struct frame_info * | |
455 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
456 | { | |
457 | struct frame_info *frame = NULL; | |
458 | ||
459 | if (frame_addr == (CORE_ADDR) 0) | |
460 | return NULL; | |
461 | ||
9d49bdc2 PA |
462 | for (frame = get_current_frame (); |
463 | frame != NULL; | |
464 | frame = get_prev_frame (frame)) | |
7d8547c9 | 465 | { |
1fac167a UW |
466 | /* The CORE_ADDR we get as argument was parsed from a string GDB |
467 | output as $fp. This output got truncated to gdbarch_addr_bit. | |
468 | Truncate the frame base address in the same manner before | |
469 | comparing it against our argument. */ | |
470 | CORE_ADDR frame_base = get_frame_base_address (frame); | |
471 | int addr_bit = gdbarch_addr_bit (get_frame_arch (frame)); | |
472 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) | |
473 | frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
474 | ||
475 | if (frame_base == frame_addr) | |
7d8547c9 AC |
476 | return frame; |
477 | } | |
9d49bdc2 PA |
478 | |
479 | return NULL; | |
7d8547c9 AC |
480 | } |
481 | ||
8b93c638 JM |
482 | struct varobj * |
483 | varobj_create (char *objname, | |
72330bd6 | 484 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
485 | { |
486 | struct varobj *var; | |
2c67cb8b AC |
487 | struct frame_info *fi; |
488 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
489 | struct block *block; |
490 | struct cleanup *old_chain; | |
491 | ||
492 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
493 | var = new_root_variable (); | |
74b7792f | 494 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
495 | |
496 | if (expression != NULL) | |
497 | { | |
498 | char *p; | |
499 | enum varobj_languages lang; | |
e55dccf0 | 500 | struct value *value = NULL; |
8b93c638 | 501 | |
9d49bdc2 PA |
502 | /* Parse and evaluate the expression, filling in as much of the |
503 | variable's data as possible. */ | |
504 | ||
505 | if (has_stack_frames ()) | |
506 | { | |
507 | /* Allow creator to specify context of variable */ | |
508 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) | |
509 | fi = get_selected_frame (NULL); | |
510 | else | |
511 | /* FIXME: cagney/2002-11-23: This code should be doing a | |
512 | lookup using the frame ID and not just the frame's | |
513 | ``address''. This, of course, means an interface | |
514 | change. However, with out that interface change ISAs, | |
515 | such as the ia64 with its two stacks, won't work. | |
516 | Similar goes for the case where there is a frameless | |
517 | function. */ | |
518 | fi = find_frame_addr_in_frame_chain (frame); | |
519 | } | |
8b93c638 | 520 | else |
9d49bdc2 | 521 | fi = NULL; |
8b93c638 | 522 | |
73a93a32 JI |
523 | /* frame = -2 means always use selected frame */ |
524 | if (type == USE_SELECTED_FRAME) | |
a5defcdc | 525 | var->root->floating = 1; |
73a93a32 | 526 | |
8b93c638 JM |
527 | block = NULL; |
528 | if (fi != NULL) | |
ae767bfb | 529 | block = get_frame_block (fi, 0); |
8b93c638 JM |
530 | |
531 | p = expression; | |
532 | innermost_block = NULL; | |
73a93a32 JI |
533 | /* Wrap the call to parse expression, so we can |
534 | return a sensible error. */ | |
535 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
536 | { | |
537 | return NULL; | |
538 | } | |
8b93c638 JM |
539 | |
540 | /* Don't allow variables to be created for types. */ | |
541 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
542 | { | |
543 | do_cleanups (old_chain); | |
bc8332bb AC |
544 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
545 | " as an expression.\n"); | |
8b93c638 JM |
546 | return NULL; |
547 | } | |
548 | ||
549 | var->format = variable_default_display (var); | |
550 | var->root->valid_block = innermost_block; | |
1b36a34b | 551 | var->name = xstrdup (expression); |
02142340 | 552 | /* For a root var, the name and the expr are the same. */ |
1b36a34b | 553 | var->path_expr = xstrdup (expression); |
8b93c638 JM |
554 | |
555 | /* When the frame is different from the current frame, | |
556 | we must select the appropriate frame before parsing | |
557 | the expression, otherwise the value will not be current. | |
558 | Since select_frame is so benign, just call it for all cases. */ | |
44a67aa7 | 559 | if (innermost_block && fi != NULL) |
8b93c638 | 560 | { |
7a424e99 | 561 | var->root->frame = get_frame_id (fi); |
c5b48eac | 562 | var->root->thread_id = pid_to_thread_id (inferior_ptid); |
206415a3 | 563 | old_fi = get_selected_frame (NULL); |
c5b48eac | 564 | select_frame (fi); |
8b93c638 JM |
565 | } |
566 | ||
340a7723 | 567 | /* We definitely need to catch errors here. |
8b93c638 JM |
568 | If evaluate_expression succeeds we got the value we wanted. |
569 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb | 570 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
e55dccf0 VP |
571 | { |
572 | /* Error getting the value. Try to at least get the | |
573 | right type. */ | |
574 | struct value *type_only_value = evaluate_type (var->root->exp); | |
575 | var->type = value_type (type_only_value); | |
576 | } | |
577 | else | |
578 | var->type = value_type (value); | |
acd65feb | 579 | |
acd65feb | 580 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
581 | |
582 | /* Set language info */ | |
583 | lang = variable_language (var); | |
d5d6fca5 | 584 | var->root->lang = &languages[lang]; |
8b93c638 JM |
585 | |
586 | /* Set ourselves as our root */ | |
587 | var->root->rootvar = var; | |
588 | ||
589 | /* Reset the selected frame */ | |
e21458b2 | 590 | if (old_fi != NULL) |
0f7d239c | 591 | select_frame (old_fi); |
8b93c638 JM |
592 | } |
593 | ||
73a93a32 JI |
594 | /* If the variable object name is null, that means this |
595 | is a temporary variable, so don't install it. */ | |
596 | ||
597 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 | 598 | { |
1b36a34b | 599 | var->obj_name = xstrdup (objname); |
8b93c638 JM |
600 | |
601 | /* If a varobj name is duplicated, the install will fail so | |
602 | we must clenup */ | |
603 | if (!install_variable (var)) | |
604 | { | |
605 | do_cleanups (old_chain); | |
606 | return NULL; | |
607 | } | |
608 | } | |
609 | ||
b6313243 | 610 | install_default_visualizer (var); |
8b93c638 JM |
611 | discard_cleanups (old_chain); |
612 | return var; | |
613 | } | |
614 | ||
615 | /* Generates an unique name that can be used for a varobj */ | |
616 | ||
617 | char * | |
618 | varobj_gen_name (void) | |
619 | { | |
620 | static int id = 0; | |
e64d9b3d | 621 | char *obj_name; |
8b93c638 JM |
622 | |
623 | /* generate a name for this object */ | |
624 | id++; | |
b435e160 | 625 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 626 | |
e64d9b3d | 627 | return obj_name; |
8b93c638 JM |
628 | } |
629 | ||
61d8f275 JK |
630 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
631 | error if OBJNAME cannot be found. */ | |
8b93c638 JM |
632 | |
633 | struct varobj * | |
634 | varobj_get_handle (char *objname) | |
635 | { | |
636 | struct vlist *cv; | |
637 | const char *chp; | |
638 | unsigned int index = 0; | |
639 | unsigned int i = 1; | |
640 | ||
641 | for (chp = objname; *chp; chp++) | |
642 | { | |
643 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
644 | } | |
645 | ||
646 | cv = *(varobj_table + index); | |
647 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
648 | cv = cv->next; | |
649 | ||
650 | if (cv == NULL) | |
8a3fe4f8 | 651 | error (_("Variable object not found")); |
8b93c638 JM |
652 | |
653 | return cv->var; | |
654 | } | |
655 | ||
656 | /* Given the handle, return the name of the object */ | |
657 | ||
658 | char * | |
659 | varobj_get_objname (struct varobj *var) | |
660 | { | |
661 | return var->obj_name; | |
662 | } | |
663 | ||
664 | /* Given the handle, return the expression represented by the object */ | |
665 | ||
666 | char * | |
667 | varobj_get_expression (struct varobj *var) | |
668 | { | |
669 | return name_of_variable (var); | |
670 | } | |
671 | ||
672 | /* Deletes a varobj and all its children if only_children == 0, | |
673 | otherwise deletes only the children; returns a malloc'ed list of all the | |
674 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
675 | ||
676 | int | |
677 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
678 | { | |
679 | int delcount; | |
680 | int mycount; | |
681 | struct cpstack *result = NULL; | |
682 | char **cp; | |
683 | ||
684 | /* Initialize a stack for temporary results */ | |
685 | cppush (&result, NULL); | |
686 | ||
687 | if (only_children) | |
688 | /* Delete only the variable children */ | |
689 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
690 | else | |
691 | /* Delete the variable and all its children */ | |
692 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
693 | ||
694 | /* We may have been asked to return a list of what has been deleted */ | |
695 | if (dellist != NULL) | |
696 | { | |
697 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
698 | ||
699 | cp = *dellist; | |
700 | mycount = delcount; | |
701 | *cp = cppop (&result); | |
702 | while ((*cp != NULL) && (mycount > 0)) | |
703 | { | |
704 | mycount--; | |
705 | cp++; | |
706 | *cp = cppop (&result); | |
707 | } | |
708 | ||
709 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 710 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 711 | mycount); |
8b93c638 JM |
712 | } |
713 | ||
714 | return delcount; | |
715 | } | |
716 | ||
b6313243 TT |
717 | /* Convenience function for varobj_set_visualizer. Instantiate a |
718 | pretty-printer for a given value. */ | |
719 | static PyObject * | |
720 | instantiate_pretty_printer (PyObject *constructor, struct value *value) | |
721 | { | |
722 | #if HAVE_PYTHON | |
723 | PyObject *val_obj = NULL; | |
724 | PyObject *printer; | |
725 | volatile struct gdb_exception except; | |
726 | ||
727 | TRY_CATCH (except, RETURN_MASK_ALL) | |
728 | { | |
729 | value = value_copy (value); | |
730 | } | |
731 | GDB_PY_HANDLE_EXCEPTION (except); | |
732 | val_obj = value_to_value_object (value); | |
733 | ||
734 | if (! val_obj) | |
735 | return NULL; | |
736 | ||
737 | printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL); | |
738 | Py_DECREF (val_obj); | |
739 | return printer; | |
740 | #endif | |
741 | return NULL; | |
742 | } | |
743 | ||
8b93c638 JM |
744 | /* Set/Get variable object display format */ |
745 | ||
746 | enum varobj_display_formats | |
747 | varobj_set_display_format (struct varobj *var, | |
748 | enum varobj_display_formats format) | |
749 | { | |
750 | switch (format) | |
751 | { | |
752 | case FORMAT_NATURAL: | |
753 | case FORMAT_BINARY: | |
754 | case FORMAT_DECIMAL: | |
755 | case FORMAT_HEXADECIMAL: | |
756 | case FORMAT_OCTAL: | |
757 | var->format = format; | |
758 | break; | |
759 | ||
760 | default: | |
761 | var->format = variable_default_display (var); | |
762 | } | |
763 | ||
ae7d22a6 VP |
764 | if (varobj_value_is_changeable_p (var) |
765 | && var->value && !value_lazy (var->value)) | |
766 | { | |
6c761d9c | 767 | xfree (var->print_value); |
b6313243 TT |
768 | var->print_value = value_get_print_value (var->value, var->format, |
769 | var->pretty_printer); | |
ae7d22a6 VP |
770 | } |
771 | ||
8b93c638 JM |
772 | return var->format; |
773 | } | |
774 | ||
775 | enum varobj_display_formats | |
776 | varobj_get_display_format (struct varobj *var) | |
777 | { | |
778 | return var->format; | |
779 | } | |
780 | ||
b6313243 TT |
781 | char * |
782 | varobj_get_display_hint (struct varobj *var) | |
783 | { | |
784 | char *result = NULL; | |
785 | ||
786 | #if HAVE_PYTHON | |
787 | PyGILState_STATE state = PyGILState_Ensure (); | |
788 | if (var->pretty_printer) | |
789 | result = gdbpy_get_display_hint (var->pretty_printer); | |
790 | PyGILState_Release (state); | |
791 | #endif | |
792 | ||
793 | return result; | |
794 | } | |
795 | ||
c5b48eac VP |
796 | /* If the variable object is bound to a specific thread, that |
797 | is its evaluation can always be done in context of a frame | |
798 | inside that thread, returns GDB id of the thread -- which | |
799 | is always positive. Otherwise, returns -1. */ | |
800 | int | |
801 | varobj_get_thread_id (struct varobj *var) | |
802 | { | |
803 | if (var->root->valid_block && var->root->thread_id > 0) | |
804 | return var->root->thread_id; | |
805 | else | |
806 | return -1; | |
807 | } | |
808 | ||
25d5ea92 VP |
809 | void |
810 | varobj_set_frozen (struct varobj *var, int frozen) | |
811 | { | |
812 | /* When a variable is unfrozen, we don't fetch its value. | |
813 | The 'not_fetched' flag remains set, so next -var-update | |
814 | won't complain. | |
815 | ||
816 | We don't fetch the value, because for structures the client | |
817 | should do -var-update anyway. It would be bad to have different | |
818 | client-size logic for structure and other types. */ | |
819 | var->frozen = frozen; | |
820 | } | |
821 | ||
822 | int | |
823 | varobj_get_frozen (struct varobj *var) | |
824 | { | |
825 | return var->frozen; | |
826 | } | |
827 | ||
b6313243 TT |
828 | static int |
829 | update_dynamic_varobj_children (struct varobj *var, | |
830 | VEC (varobj_p) **changed, | |
831 | VEC (varobj_p) **new_and_unchanged, | |
832 | int *cchanged) | |
833 | ||
834 | { | |
835 | #if HAVE_PYTHON | |
836 | /* FIXME: we *might* want to provide this functionality as | |
837 | a standalone function, so that other interested parties | |
838 | than varobj code can benefit for this. */ | |
839 | struct cleanup *back_to; | |
840 | PyObject *children; | |
841 | PyObject *iterator; | |
842 | int i; | |
843 | int children_changed = 0; | |
844 | PyObject *printer = var->pretty_printer; | |
845 | PyGILState_STATE state; | |
846 | ||
847 | state = PyGILState_Ensure (); | |
848 | back_to = make_cleanup_py_restore_gil (&state); | |
849 | ||
850 | *cchanged = 0; | |
851 | if (!PyObject_HasAttr (printer, gdbpy_children_cst)) | |
852 | { | |
853 | do_cleanups (back_to); | |
854 | return 0; | |
855 | } | |
856 | ||
857 | children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst, | |
858 | NULL); | |
859 | ||
860 | if (!children) | |
861 | { | |
862 | gdbpy_print_stack (); | |
da1f2771 | 863 | error (_("Null value returned for children")); |
b6313243 TT |
864 | } |
865 | ||
866 | make_cleanup_py_decref (children); | |
867 | ||
868 | if (!PyIter_Check (children)) | |
da1f2771 | 869 | error (_("Returned value is not iterable")); |
b6313243 TT |
870 | |
871 | iterator = PyObject_GetIter (children); | |
872 | if (!iterator) | |
873 | { | |
874 | gdbpy_print_stack (); | |
da1f2771 | 875 | error (_("Could not get children iterator")); |
b6313243 TT |
876 | } |
877 | make_cleanup_py_decref (iterator); | |
878 | ||
879 | for (i = 0; ; ++i) | |
880 | { | |
881 | PyObject *item = PyIter_Next (iterator); | |
882 | PyObject *py_v; | |
883 | struct value *v; | |
884 | char *name; | |
885 | struct cleanup *inner; | |
886 | ||
887 | if (!item) | |
888 | break; | |
889 | inner = make_cleanup_py_decref (item); | |
890 | ||
891 | if (!PyArg_ParseTuple (item, "sO", &name, &py_v)) | |
da1f2771 | 892 | error (_("Invalid item from the child list")); |
b6313243 TT |
893 | |
894 | if (PyObject_TypeCheck (py_v, &value_object_type)) | |
895 | { | |
896 | /* If we just call convert_value_from_python for this type, | |
897 | we won't know who owns the result. For this one case we | |
898 | need to copy the resulting value. */ | |
899 | v = value_object_to_value (py_v); | |
900 | v = value_copy (v); | |
901 | } | |
902 | else | |
903 | v = convert_value_from_python (py_v); | |
904 | ||
905 | /* TODO: This assume the name of the i-th child never changes. */ | |
906 | ||
907 | /* Now see what to do here. */ | |
908 | if (VEC_length (varobj_p, var->children) < i + 1) | |
909 | { | |
910 | /* There's no child yet. */ | |
911 | struct varobj *child = varobj_add_child (var, name, v); | |
912 | if (new_and_unchanged) | |
913 | VEC_safe_push (varobj_p, *new_and_unchanged, child); | |
914 | children_changed = 1; | |
915 | } | |
916 | else | |
917 | { | |
918 | varobj_p existing = VEC_index (varobj_p, var->children, i); | |
919 | if (install_new_value (existing, v, 0) && changed) | |
920 | { | |
921 | if (changed) | |
922 | VEC_safe_push (varobj_p, *changed, existing); | |
923 | } | |
924 | else | |
925 | { | |
926 | if (new_and_unchanged) | |
927 | VEC_safe_push (varobj_p, *new_and_unchanged, existing); | |
928 | } | |
929 | } | |
930 | ||
931 | do_cleanups (inner); | |
932 | } | |
933 | ||
934 | if (i < VEC_length (varobj_p, var->children)) | |
935 | { | |
936 | int i; | |
937 | children_changed = 1; | |
938 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) | |
939 | varobj_delete (VEC_index (varobj_p, var->children, i), NULL, 0); | |
940 | } | |
941 | VEC_truncate (varobj_p, var->children, i); | |
942 | var->num_children = VEC_length (varobj_p, var->children); | |
943 | ||
944 | do_cleanups (back_to); | |
945 | ||
946 | *cchanged = children_changed; | |
947 | return 1; | |
948 | #else | |
949 | gdb_assert (0 && "should never be called if Python is not enabled"); | |
950 | #endif | |
951 | } | |
25d5ea92 | 952 | |
8b93c638 JM |
953 | int |
954 | varobj_get_num_children (struct varobj *var) | |
955 | { | |
956 | if (var->num_children == -1) | |
b6313243 TT |
957 | { |
958 | int changed; | |
959 | if (!var->pretty_printer | |
960 | || !update_dynamic_varobj_children (var, NULL, NULL, &changed)) | |
961 | var->num_children = number_of_children (var); | |
962 | } | |
8b93c638 JM |
963 | |
964 | return var->num_children; | |
965 | } | |
966 | ||
967 | /* Creates a list of the immediate children of a variable object; | |
968 | the return code is the number of such children or -1 on error */ | |
969 | ||
d56d46f5 VP |
970 | VEC (varobj_p)* |
971 | varobj_list_children (struct varobj *var) | |
8b93c638 JM |
972 | { |
973 | struct varobj *child; | |
974 | char *name; | |
b6313243 TT |
975 | int i, children_changed; |
976 | ||
977 | var->children_requested = 1; | |
978 | ||
979 | if (var->pretty_printer | |
980 | /* This, in theory, can result in the number of children changing without | |
981 | frontend noticing. But well, calling -var-list-children on the same | |
982 | varobj twice is not something a sane frontend would do. */ | |
983 | && update_dynamic_varobj_children (var, NULL, NULL, &children_changed)) | |
984 | return var->children; | |
8b93c638 | 985 | |
8b93c638 JM |
986 | if (var->num_children == -1) |
987 | var->num_children = number_of_children (var); | |
988 | ||
74a44383 DJ |
989 | /* If that failed, give up. */ |
990 | if (var->num_children == -1) | |
d56d46f5 | 991 | return var->children; |
74a44383 | 992 | |
28335dcc VP |
993 | /* If we're called when the list of children is not yet initialized, |
994 | allocate enough elements in it. */ | |
995 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
996 | VEC_safe_push (varobj_p, var->children, NULL); | |
997 | ||
8b93c638 JM |
998 | for (i = 0; i < var->num_children; i++) |
999 | { | |
d56d46f5 | 1000 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
1001 | |
1002 | if (existing == NULL) | |
1003 | { | |
1004 | /* Either it's the first call to varobj_list_children for | |
1005 | this variable object, and the child was never created, | |
1006 | or it was explicitly deleted by the client. */ | |
1007 | name = name_of_child (var, i); | |
1008 | existing = create_child (var, i, name); | |
1009 | VEC_replace (varobj_p, var->children, i, existing); | |
b6313243 | 1010 | install_default_visualizer (existing); |
28335dcc | 1011 | } |
8b93c638 JM |
1012 | } |
1013 | ||
d56d46f5 | 1014 | return var->children; |
8b93c638 JM |
1015 | } |
1016 | ||
b6313243 TT |
1017 | static struct varobj * |
1018 | varobj_add_child (struct varobj *var, const char *name, struct value *value) | |
1019 | { | |
1020 | varobj_p v = create_child_with_value (var, | |
1021 | VEC_length (varobj_p, var->children), | |
1022 | name, value); | |
1023 | VEC_safe_push (varobj_p, var->children, v); | |
1024 | install_default_visualizer (v); | |
1025 | return v; | |
1026 | } | |
1027 | ||
8b93c638 JM |
1028 | /* Obtain the type of an object Variable as a string similar to the one gdb |
1029 | prints on the console */ | |
1030 | ||
1031 | char * | |
1032 | varobj_get_type (struct varobj *var) | |
1033 | { | |
8b93c638 | 1034 | /* For the "fake" variables, do not return a type. (It's type is |
8756216b DP |
1035 | NULL, too.) |
1036 | Do not return a type for invalid variables as well. */ | |
1037 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
1038 | return NULL; |
1039 | ||
1a4300e9 | 1040 | return type_to_string (var->type); |
8b93c638 JM |
1041 | } |
1042 | ||
1ecb4ee0 DJ |
1043 | /* Obtain the type of an object variable. */ |
1044 | ||
1045 | struct type * | |
1046 | varobj_get_gdb_type (struct varobj *var) | |
1047 | { | |
1048 | return var->type; | |
1049 | } | |
1050 | ||
02142340 VP |
1051 | /* Return a pointer to the full rooted expression of varobj VAR. |
1052 | If it has not been computed yet, compute it. */ | |
1053 | char * | |
1054 | varobj_get_path_expr (struct varobj *var) | |
1055 | { | |
1056 | if (var->path_expr != NULL) | |
1057 | return var->path_expr; | |
1058 | else | |
1059 | { | |
1060 | /* For root varobjs, we initialize path_expr | |
1061 | when creating varobj, so here it should be | |
1062 | child varobj. */ | |
1063 | gdb_assert (!is_root_p (var)); | |
1064 | return (*var->root->lang->path_expr_of_child) (var); | |
1065 | } | |
1066 | } | |
1067 | ||
8b93c638 JM |
1068 | enum varobj_languages |
1069 | varobj_get_language (struct varobj *var) | |
1070 | { | |
1071 | return variable_language (var); | |
1072 | } | |
1073 | ||
1074 | int | |
1075 | varobj_get_attributes (struct varobj *var) | |
1076 | { | |
1077 | int attributes = 0; | |
1078 | ||
340a7723 | 1079 | if (varobj_editable_p (var)) |
8b93c638 JM |
1080 | /* FIXME: define masks for attributes */ |
1081 | attributes |= 0x00000001; /* Editable */ | |
1082 | ||
1083 | return attributes; | |
1084 | } | |
1085 | ||
de051565 MK |
1086 | char * |
1087 | varobj_get_formatted_value (struct varobj *var, | |
1088 | enum varobj_display_formats format) | |
1089 | { | |
1090 | return my_value_of_variable (var, format); | |
1091 | } | |
1092 | ||
8b93c638 JM |
1093 | char * |
1094 | varobj_get_value (struct varobj *var) | |
1095 | { | |
de051565 | 1096 | return my_value_of_variable (var, var->format); |
8b93c638 JM |
1097 | } |
1098 | ||
1099 | /* Set the value of an object variable (if it is editable) to the | |
1100 | value of the given expression */ | |
1101 | /* Note: Invokes functions that can call error() */ | |
1102 | ||
1103 | int | |
1104 | varobj_set_value (struct varobj *var, char *expression) | |
1105 | { | |
30b28db1 | 1106 | struct value *val; |
8b93c638 | 1107 | int offset = 0; |
a6c442d8 | 1108 | int error = 0; |
8b93c638 JM |
1109 | |
1110 | /* The argument "expression" contains the variable's new value. | |
1111 | We need to first construct a legal expression for this -- ugh! */ | |
1112 | /* Does this cover all the bases? */ | |
1113 | struct expression *exp; | |
30b28db1 | 1114 | struct value *value; |
8b93c638 | 1115 | int saved_input_radix = input_radix; |
340a7723 NR |
1116 | char *s = expression; |
1117 | int i; | |
8b93c638 | 1118 | |
340a7723 | 1119 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 1120 | |
340a7723 NR |
1121 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ |
1122 | exp = parse_exp_1 (&s, 0, 0); | |
1123 | if (!gdb_evaluate_expression (exp, &value)) | |
1124 | { | |
1125 | /* We cannot proceed without a valid expression. */ | |
1126 | xfree (exp); | |
1127 | return 0; | |
8b93c638 JM |
1128 | } |
1129 | ||
340a7723 NR |
1130 | /* All types that are editable must also be changeable. */ |
1131 | gdb_assert (varobj_value_is_changeable_p (var)); | |
1132 | ||
1133 | /* The value of a changeable variable object must not be lazy. */ | |
1134 | gdb_assert (!value_lazy (var->value)); | |
1135 | ||
1136 | /* Need to coerce the input. We want to check if the | |
1137 | value of the variable object will be different | |
1138 | after assignment, and the first thing value_assign | |
1139 | does is coerce the input. | |
1140 | For example, if we are assigning an array to a pointer variable we | |
1141 | should compare the pointer with the the array's address, not with the | |
1142 | array's content. */ | |
1143 | value = coerce_array (value); | |
1144 | ||
1145 | /* The new value may be lazy. gdb_value_assign, or | |
1146 | rather value_contents, will take care of this. | |
1147 | If fetching of the new value will fail, gdb_value_assign | |
1148 | with catch the exception. */ | |
1149 | if (!gdb_value_assign (var->value, value, &val)) | |
1150 | return 0; | |
1151 | ||
1152 | /* If the value has changed, record it, so that next -var-update can | |
1153 | report this change. If a variable had a value of '1', we've set it | |
1154 | to '333' and then set again to '1', when -var-update will report this | |
1155 | variable as changed -- because the first assignment has set the | |
1156 | 'updated' flag. There's no need to optimize that, because return value | |
1157 | of -var-update should be considered an approximation. */ | |
1158 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
1159 | input_radix = saved_input_radix; | |
1160 | return 1; | |
8b93c638 JM |
1161 | } |
1162 | ||
1163 | /* Returns a malloc'ed list with all root variable objects */ | |
1164 | int | |
1165 | varobj_list (struct varobj ***varlist) | |
1166 | { | |
1167 | struct varobj **cv; | |
1168 | struct varobj_root *croot; | |
1169 | int mycount = rootcount; | |
1170 | ||
1171 | /* Alloc (rootcount + 1) entries for the result */ | |
1172 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
1173 | ||
1174 | cv = *varlist; | |
1175 | croot = rootlist; | |
1176 | while ((croot != NULL) && (mycount > 0)) | |
1177 | { | |
1178 | *cv = croot->rootvar; | |
1179 | mycount--; | |
1180 | cv++; | |
1181 | croot = croot->next; | |
1182 | } | |
1183 | /* Mark the end of the list */ | |
1184 | *cv = NULL; | |
1185 | ||
1186 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
1187 | warning |
1188 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
1189 | rootcount, mycount); | |
8b93c638 JM |
1190 | |
1191 | return rootcount; | |
1192 | } | |
1193 | ||
acd65feb VP |
1194 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
1195 | this is the first assignement after the variable object was just | |
1196 | created, or changed type. In that case, just assign the value | |
1197 | and return 0. | |
ee342b23 VP |
1198 | Otherwise, assign the new value, and return 1 if the value is different |
1199 | from the current one, 0 otherwise. The comparison is done on textual | |
1200 | representation of value. Therefore, some types need not be compared. E.g. | |
1201 | for structures the reported value is always "{...}", so no comparison is | |
1202 | necessary here. If the old value was NULL and new one is not, or vice versa, | |
1203 | we always return 1. | |
b26ed50d VP |
1204 | |
1205 | The VALUE parameter should not be released -- the function will | |
1206 | take care of releasing it when needed. */ | |
acd65feb VP |
1207 | static int |
1208 | install_new_value (struct varobj *var, struct value *value, int initial) | |
1209 | { | |
1210 | int changeable; | |
1211 | int need_to_fetch; | |
1212 | int changed = 0; | |
25d5ea92 | 1213 | int intentionally_not_fetched = 0; |
7a4d50bf | 1214 | char *print_value = NULL; |
acd65feb | 1215 | |
acd65feb VP |
1216 | /* We need to know the varobj's type to decide if the value should |
1217 | be fetched or not. C++ fake children (public/protected/private) don't have | |
1218 | a type. */ | |
1219 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 1220 | changeable = varobj_value_is_changeable_p (var); |
b6313243 TT |
1221 | |
1222 | /* If the type has custom visualizer, we consider it to be always | |
1223 | changeable. FIXME: need to make sure this behaviour will not | |
1224 | mess up read-sensitive values. */ | |
1225 | if (var->pretty_printer) | |
1226 | changeable = 1; | |
1227 | ||
acd65feb VP |
1228 | need_to_fetch = changeable; |
1229 | ||
b26ed50d VP |
1230 | /* We are not interested in the address of references, and given |
1231 | that in C++ a reference is not rebindable, it cannot | |
1232 | meaningfully change. So, get hold of the real value. */ | |
1233 | if (value) | |
1234 | { | |
1235 | value = coerce_ref (value); | |
1236 | release_value (value); | |
1237 | } | |
1238 | ||
acd65feb VP |
1239 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1240 | /* For unions, we need to fetch the value implicitly because | |
1241 | of implementation of union member fetch. When gdb | |
1242 | creates a value for a field and the value of the enclosing | |
1243 | structure is not lazy, it immediately copies the necessary | |
1244 | bytes from the enclosing values. If the enclosing value is | |
1245 | lazy, the call to value_fetch_lazy on the field will read | |
1246 | the data from memory. For unions, that means we'll read the | |
1247 | same memory more than once, which is not desirable. So | |
1248 | fetch now. */ | |
1249 | need_to_fetch = 1; | |
1250 | ||
1251 | /* The new value might be lazy. If the type is changeable, | |
1252 | that is we'll be comparing values of this type, fetch the | |
1253 | value now. Otherwise, on the next update the old value | |
1254 | will be lazy, which means we've lost that old value. */ | |
1255 | if (need_to_fetch && value && value_lazy (value)) | |
1256 | { | |
25d5ea92 VP |
1257 | struct varobj *parent = var->parent; |
1258 | int frozen = var->frozen; | |
1259 | for (; !frozen && parent; parent = parent->parent) | |
1260 | frozen |= parent->frozen; | |
1261 | ||
1262 | if (frozen && initial) | |
1263 | { | |
1264 | /* For variables that are frozen, or are children of frozen | |
1265 | variables, we don't do fetch on initial assignment. | |
1266 | For non-initial assignemnt we do the fetch, since it means we're | |
1267 | explicitly asked to compare the new value with the old one. */ | |
1268 | intentionally_not_fetched = 1; | |
1269 | } | |
1270 | else if (!gdb_value_fetch_lazy (value)) | |
acd65feb | 1271 | { |
acd65feb VP |
1272 | /* Set the value to NULL, so that for the next -var-update, |
1273 | we don't try to compare the new value with this value, | |
1274 | that we couldn't even read. */ | |
1275 | value = NULL; | |
1276 | } | |
acd65feb VP |
1277 | } |
1278 | ||
b6313243 | 1279 | |
7a4d50bf VP |
1280 | /* Below, we'll be comparing string rendering of old and new |
1281 | values. Don't get string rendering if the value is | |
1282 | lazy -- if it is, the code above has decided that the value | |
1283 | should not be fetched. */ | |
1284 | if (value && !value_lazy (value)) | |
b6313243 TT |
1285 | print_value = value_get_print_value (value, var->format, |
1286 | var->pretty_printer); | |
7a4d50bf | 1287 | |
acd65feb VP |
1288 | /* If the type is changeable, compare the old and the new values. |
1289 | If this is the initial assignment, we don't have any old value | |
1290 | to compare with. */ | |
7a4d50bf | 1291 | if (!initial && changeable) |
acd65feb VP |
1292 | { |
1293 | /* If the value of the varobj was changed by -var-set-value, then the | |
1294 | value in the varobj and in the target is the same. However, that value | |
1295 | is different from the value that the varobj had after the previous | |
57e66780 | 1296 | -var-update. So need to the varobj as changed. */ |
acd65feb | 1297 | if (var->updated) |
57e66780 | 1298 | { |
57e66780 DJ |
1299 | changed = 1; |
1300 | } | |
acd65feb VP |
1301 | else |
1302 | { | |
1303 | /* Try to compare the values. That requires that both | |
1304 | values are non-lazy. */ | |
25d5ea92 VP |
1305 | if (var->not_fetched && value_lazy (var->value)) |
1306 | { | |
1307 | /* This is a frozen varobj and the value was never read. | |
1308 | Presumably, UI shows some "never read" indicator. | |
1309 | Now that we've fetched the real value, we need to report | |
1310 | this varobj as changed so that UI can show the real | |
1311 | value. */ | |
1312 | changed = 1; | |
1313 | } | |
1314 | else if (var->value == NULL && value == NULL) | |
acd65feb VP |
1315 | /* Equal. */ |
1316 | ; | |
1317 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1318 | { |
57e66780 DJ |
1319 | changed = 1; |
1320 | } | |
acd65feb VP |
1321 | else |
1322 | { | |
1323 | gdb_assert (!value_lazy (var->value)); | |
1324 | gdb_assert (!value_lazy (value)); | |
85265413 | 1325 | |
57e66780 | 1326 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1327 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1328 | changed = 1; |
acd65feb VP |
1329 | } |
1330 | } | |
1331 | } | |
85265413 | 1332 | |
ee342b23 VP |
1333 | if (!initial && !changeable) |
1334 | { | |
1335 | /* For values that are not changeable, we don't compare the values. | |
1336 | However, we want to notice if a value was not NULL and now is NULL, | |
1337 | or vise versa, so that we report when top-level varobjs come in scope | |
1338 | and leave the scope. */ | |
1339 | changed = (var->value != NULL) != (value != NULL); | |
1340 | } | |
1341 | ||
acd65feb | 1342 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1343 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1344 | value_free (var->value); |
1345 | var->value = value; | |
7a4d50bf VP |
1346 | if (var->print_value) |
1347 | xfree (var->print_value); | |
1348 | var->print_value = print_value; | |
25d5ea92 VP |
1349 | if (value && value_lazy (value) && intentionally_not_fetched) |
1350 | var->not_fetched = 1; | |
1351 | else | |
1352 | var->not_fetched = 0; | |
acd65feb | 1353 | var->updated = 0; |
85265413 | 1354 | |
b26ed50d | 1355 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1356 | |
1357 | return changed; | |
1358 | } | |
acd65feb | 1359 | |
b6313243 TT |
1360 | static void |
1361 | install_visualizer (struct varobj *var, PyObject *visualizer) | |
1362 | { | |
1363 | #if HAVE_PYTHON | |
1364 | /* If there are any children now, wipe them. */ | |
1365 | varobj_delete (var, NULL, 1 /* children only */); | |
1366 | var->num_children = -1; | |
1367 | ||
1368 | Py_XDECREF (var->pretty_printer); | |
1369 | var->pretty_printer = visualizer; | |
1370 | ||
1371 | install_new_value (var, var->value, 1); | |
1372 | ||
1373 | /* If we removed the visualizer, and the user ever requested the | |
1374 | object's children, then we must compute the list of children. | |
1375 | Note that we needn't do this when installing a visualizer, | |
1376 | because updating will recompute dynamic children. */ | |
1377 | if (!visualizer && var->children_requested) | |
1378 | varobj_list_children (var); | |
1379 | #else | |
da1f2771 | 1380 | error (_("Python support required")); |
b6313243 TT |
1381 | #endif |
1382 | } | |
1383 | ||
1384 | static void | |
1385 | install_default_visualizer (struct varobj *var) | |
1386 | { | |
1387 | #if HAVE_PYTHON | |
1388 | struct cleanup *cleanup; | |
1389 | PyGILState_STATE state; | |
1390 | PyObject *pretty_printer = NULL; | |
1391 | ||
1392 | state = PyGILState_Ensure (); | |
1393 | cleanup = make_cleanup_py_restore_gil (&state); | |
1394 | ||
1395 | if (var->value) | |
1396 | { | |
1397 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value); | |
1398 | if (! pretty_printer) | |
1399 | { | |
1400 | gdbpy_print_stack (); | |
1401 | error (_("Cannot instantiate printer for default visualizer")); | |
1402 | } | |
1403 | } | |
1404 | ||
1405 | if (pretty_printer == Py_None) | |
1406 | { | |
1407 | Py_DECREF (pretty_printer); | |
1408 | pretty_printer = NULL; | |
1409 | } | |
1410 | ||
1411 | install_visualizer (var, pretty_printer); | |
1412 | do_cleanups (cleanup); | |
1413 | #else | |
1414 | /* No error is right as this function is inserted just as a hook. */ | |
1415 | #endif | |
1416 | } | |
1417 | ||
1418 | void | |
1419 | varobj_set_visualizer (struct varobj *var, const char *visualizer) | |
1420 | { | |
1421 | #if HAVE_PYTHON | |
1422 | PyObject *mainmod, *globals, *pretty_printer, *constructor; | |
1423 | struct cleanup *back_to, *value; | |
1424 | PyGILState_STATE state; | |
1425 | ||
1426 | ||
1427 | state = PyGILState_Ensure (); | |
1428 | back_to = make_cleanup_py_restore_gil (&state); | |
1429 | ||
1430 | mainmod = PyImport_AddModule ("__main__"); | |
1431 | globals = PyModule_GetDict (mainmod); | |
1432 | Py_INCREF (globals); | |
1433 | make_cleanup_py_decref (globals); | |
1434 | ||
1435 | constructor = PyRun_String (visualizer, Py_eval_input, globals, globals); | |
1436 | ||
1437 | /* Do not instantiate NoneType. */ | |
1438 | if (constructor == Py_None) | |
1439 | { | |
1440 | pretty_printer = Py_None; | |
1441 | Py_INCREF (pretty_printer); | |
1442 | } | |
1443 | else | |
1444 | pretty_printer = instantiate_pretty_printer (constructor, var->value); | |
1445 | ||
1446 | Py_XDECREF (constructor); | |
1447 | ||
1448 | if (! pretty_printer) | |
1449 | { | |
1450 | gdbpy_print_stack (); | |
da1f2771 | 1451 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
b6313243 TT |
1452 | } |
1453 | ||
1454 | if (pretty_printer == Py_None) | |
1455 | { | |
1456 | Py_DECREF (pretty_printer); | |
1457 | pretty_printer = NULL; | |
1458 | } | |
1459 | ||
1460 | install_visualizer (var, pretty_printer); | |
1461 | ||
1462 | do_cleanups (back_to); | |
1463 | #else | |
da1f2771 | 1464 | error (_("Python support required")); |
b6313243 TT |
1465 | #endif |
1466 | } | |
1467 | ||
8b93c638 JM |
1468 | /* Update the values for a variable and its children. This is a |
1469 | two-pronged attack. First, re-parse the value for the root's | |
1470 | expression to see if it's changed. Then go all the way | |
1471 | through its children, reconstructing them and noting if they've | |
1472 | changed. | |
1473 | ||
25d5ea92 VP |
1474 | The EXPLICIT parameter specifies if this call is result |
1475 | of MI request to update this specific variable, or | |
1476 | result of implicit -var-update *. For implicit request, we don't | |
1477 | update frozen variables. | |
705da579 KS |
1478 | |
1479 | NOTE: This function may delete the caller's varobj. If it | |
8756216b DP |
1480 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1481 | to point to the new varobj. */ | |
8b93c638 | 1482 | |
f7f9ae2c | 1483 | VEC(varobj_update_result) *varobj_update (struct varobj **varp, int explicit) |
8b93c638 JM |
1484 | { |
1485 | int changed = 0; | |
25d5ea92 | 1486 | int type_changed = 0; |
8b93c638 JM |
1487 | int i; |
1488 | int vleft; | |
8b93c638 JM |
1489 | struct varobj *v; |
1490 | struct varobj **cv; | |
2c67cb8b | 1491 | struct varobj **templist = NULL; |
30b28db1 | 1492 | struct value *new; |
b6313243 | 1493 | VEC (varobj_update_result) *stack = NULL; |
f7f9ae2c | 1494 | VEC (varobj_update_result) *result = NULL; |
e64d9b3d | 1495 | struct frame_info *fi; |
8b93c638 | 1496 | |
25d5ea92 VP |
1497 | /* Frozen means frozen -- we don't check for any change in |
1498 | this varobj, including its going out of scope, or | |
1499 | changing type. One use case for frozen varobjs is | |
1500 | retaining previously evaluated expressions, and we don't | |
1501 | want them to be reevaluated at all. */ | |
1502 | if (!explicit && (*varp)->frozen) | |
f7f9ae2c | 1503 | return result; |
8756216b DP |
1504 | |
1505 | if (!(*varp)->root->is_valid) | |
f7f9ae2c VP |
1506 | { |
1507 | varobj_update_result r = {*varp}; | |
1508 | r.status = VAROBJ_INVALID; | |
1509 | VEC_safe_push (varobj_update_result, result, &r); | |
1510 | return result; | |
1511 | } | |
8b93c638 | 1512 | |
25d5ea92 | 1513 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1514 | { |
f7f9ae2c VP |
1515 | varobj_update_result r = {*varp}; |
1516 | r.status = VAROBJ_IN_SCOPE; | |
1517 | ||
25d5ea92 VP |
1518 | /* Update the root variable. value_of_root can return NULL |
1519 | if the variable is no longer around, i.e. we stepped out of | |
1520 | the frame in which a local existed. We are letting the | |
1521 | value_of_root variable dispose of the varobj if the type | |
1522 | has changed. */ | |
25d5ea92 | 1523 | new = value_of_root (varp, &type_changed); |
f7f9ae2c VP |
1524 | r.varobj = *varp; |
1525 | ||
1526 | r.type_changed = type_changed; | |
ea56f9c2 | 1527 | if (install_new_value ((*varp), new, type_changed)) |
f7f9ae2c | 1528 | r.changed = 1; |
ea56f9c2 | 1529 | |
25d5ea92 | 1530 | if (new == NULL) |
f7f9ae2c | 1531 | r.status = VAROBJ_NOT_IN_SCOPE; |
b6313243 | 1532 | r.value_installed = 1; |
f7f9ae2c VP |
1533 | |
1534 | if (r.status == VAROBJ_NOT_IN_SCOPE) | |
b6313243 | 1535 | { |
0b4bc29a JK |
1536 | if (r.type_changed || r.changed) |
1537 | VEC_safe_push (varobj_update_result, result, &r); | |
b6313243 TT |
1538 | return result; |
1539 | } | |
1540 | ||
1541 | VEC_safe_push (varobj_update_result, stack, &r); | |
1542 | } | |
1543 | else | |
1544 | { | |
1545 | varobj_update_result r = {*varp}; | |
1546 | VEC_safe_push (varobj_update_result, stack, &r); | |
b20d8971 | 1547 | } |
8b93c638 | 1548 | |
8756216b | 1549 | /* Walk through the children, reconstructing them all. */ |
b6313243 | 1550 | while (!VEC_empty (varobj_update_result, stack)) |
8b93c638 | 1551 | { |
b6313243 TT |
1552 | varobj_update_result r = *(VEC_last (varobj_update_result, stack)); |
1553 | struct varobj *v = r.varobj; | |
1554 | ||
1555 | VEC_pop (varobj_update_result, stack); | |
1556 | ||
1557 | /* Update this variable, unless it's a root, which is already | |
1558 | updated. */ | |
1559 | if (!r.value_installed) | |
1560 | { | |
1561 | new = value_of_child (v->parent, v->index); | |
1562 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1563 | { | |
1564 | r.changed = 1; | |
1565 | v->updated = 0; | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | /* We probably should not get children of a varobj that has a | |
1570 | pretty-printer, but for which -var-list-children was never | |
1571 | invoked. Presumably, such varobj is not yet expanded in the | |
1572 | UI, so we need not bother getting it. */ | |
1573 | if (v->pretty_printer) | |
1574 | { | |
1575 | VEC (varobj_p) *changed = 0, *new_and_unchanged = 0; | |
1576 | int i, children_changed; | |
1577 | varobj_p tmp; | |
1578 | ||
1579 | if (!v->children_requested) | |
1580 | continue; | |
1581 | ||
1582 | if (v->frozen) | |
1583 | continue; | |
1584 | ||
1585 | /* If update_dynamic_varobj_children returns 0, then we have | |
1586 | a non-conforming pretty-printer, so we skip it. */ | |
1587 | if (update_dynamic_varobj_children (v, &changed, &new_and_unchanged, | |
1588 | &children_changed)) | |
1589 | { | |
1590 | if (children_changed) | |
1591 | r.children_changed = 1; | |
1592 | for (i = 0; VEC_iterate (varobj_p, changed, i, tmp); ++i) | |
1593 | { | |
1594 | varobj_update_result r = {tmp}; | |
1595 | r.changed = 1; | |
1596 | r.value_installed = 1; | |
1597 | VEC_safe_push (varobj_update_result, stack, &r); | |
1598 | } | |
1599 | for (i = 0; | |
1600 | VEC_iterate (varobj_p, new_and_unchanged, i, tmp); | |
1601 | ++i) | |
1602 | { | |
1603 | varobj_update_result r = {tmp}; | |
1604 | r.value_installed = 1; | |
1605 | VEC_safe_push (varobj_update_result, stack, &r); | |
1606 | } | |
1607 | if (r.changed || r.children_changed) | |
1608 | VEC_safe_push (varobj_update_result, result, &r); | |
1609 | continue; | |
1610 | } | |
1611 | } | |
28335dcc VP |
1612 | |
1613 | /* Push any children. Use reverse order so that the first | |
1614 | child is popped from the work stack first, and so | |
1615 | will be added to result first. This does not | |
1616 | affect correctness, just "nicer". */ | |
1617 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1618 | { |
28335dcc VP |
1619 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1620 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
25d5ea92 | 1621 | if (c != NULL && !c->frozen) |
28335dcc | 1622 | { |
b6313243 TT |
1623 | varobj_update_result r = {c}; |
1624 | VEC_safe_push (varobj_update_result, stack, &r); | |
28335dcc | 1625 | } |
8b93c638 | 1626 | } |
b6313243 TT |
1627 | |
1628 | if (r.changed || r.type_changed) | |
1629 | VEC_safe_push (varobj_update_result, result, &r); | |
8b93c638 JM |
1630 | } |
1631 | ||
b6313243 TT |
1632 | VEC_free (varobj_update_result, stack); |
1633 | ||
f7f9ae2c | 1634 | return result; |
8b93c638 JM |
1635 | } |
1636 | \f | |
1637 | ||
1638 | /* Helper functions */ | |
1639 | ||
1640 | /* | |
1641 | * Variable object construction/destruction | |
1642 | */ | |
1643 | ||
1644 | static int | |
fba45db2 KB |
1645 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1646 | int only_children_p) | |
8b93c638 JM |
1647 | { |
1648 | int delcount = 0; | |
1649 | ||
1650 | delete_variable_1 (resultp, &delcount, var, | |
1651 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1652 | ||
1653 | return delcount; | |
1654 | } | |
1655 | ||
1656 | /* Delete the variable object VAR and its children */ | |
1657 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1658 | and the parent is not removed we dump core. It must be always | |
1659 | initially called with remove_from_parent_p set */ | |
1660 | static void | |
72330bd6 AC |
1661 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1662 | struct varobj *var, int only_children_p, | |
1663 | int remove_from_parent_p) | |
8b93c638 | 1664 | { |
28335dcc | 1665 | int i; |
8b93c638 JM |
1666 | |
1667 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1668 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1669 | { | |
1670 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
214270ab VP |
1671 | if (!child) |
1672 | continue; | |
8b93c638 | 1673 | if (!remove_from_parent_p) |
28335dcc VP |
1674 | child->parent = NULL; |
1675 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1676 | } |
28335dcc | 1677 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1678 | |
1679 | /* if we were called to delete only the children we are done here */ | |
1680 | if (only_children_p) | |
1681 | return; | |
1682 | ||
1683 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1684 | /* If the name is null, this is a temporary variable, that has not |
1685 | yet been installed, don't report it, it belongs to the caller... */ | |
1686 | if (var->obj_name != NULL) | |
8b93c638 | 1687 | { |
5b616ba1 | 1688 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1689 | *delcountp = *delcountp + 1; |
1690 | } | |
1691 | ||
1692 | /* If this variable has a parent, remove it from its parent's list */ | |
1693 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1694 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1695 | expensive list search to find the element to remove when we are | |
1696 | discarding the list afterwards */ | |
72330bd6 | 1697 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1698 | { |
28335dcc | 1699 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1700 | } |
72330bd6 | 1701 | |
73a93a32 JI |
1702 | if (var->obj_name != NULL) |
1703 | uninstall_variable (var); | |
8b93c638 JM |
1704 | |
1705 | /* Free memory associated with this variable */ | |
1706 | free_variable (var); | |
1707 | } | |
1708 | ||
1709 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1710 | static int | |
fba45db2 | 1711 | install_variable (struct varobj *var) |
8b93c638 JM |
1712 | { |
1713 | struct vlist *cv; | |
1714 | struct vlist *newvl; | |
1715 | const char *chp; | |
1716 | unsigned int index = 0; | |
1717 | unsigned int i = 1; | |
1718 | ||
1719 | for (chp = var->obj_name; *chp; chp++) | |
1720 | { | |
1721 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1722 | } | |
1723 | ||
1724 | cv = *(varobj_table + index); | |
1725 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1726 | cv = cv->next; | |
1727 | ||
1728 | if (cv != NULL) | |
8a3fe4f8 | 1729 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1730 | |
1731 | /* Add varobj to hash table */ | |
1732 | newvl = xmalloc (sizeof (struct vlist)); | |
1733 | newvl->next = *(varobj_table + index); | |
1734 | newvl->var = var; | |
1735 | *(varobj_table + index) = newvl; | |
1736 | ||
1737 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1738 | if (is_root_p (var)) |
8b93c638 JM |
1739 | { |
1740 | /* Add to list of root variables */ | |
1741 | if (rootlist == NULL) | |
1742 | var->root->next = NULL; | |
1743 | else | |
1744 | var->root->next = rootlist; | |
1745 | rootlist = var->root; | |
1746 | rootcount++; | |
1747 | } | |
1748 | ||
1749 | return 1; /* OK */ | |
1750 | } | |
1751 | ||
1752 | /* Unistall the object VAR. */ | |
1753 | static void | |
fba45db2 | 1754 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1755 | { |
1756 | struct vlist *cv; | |
1757 | struct vlist *prev; | |
1758 | struct varobj_root *cr; | |
1759 | struct varobj_root *prer; | |
1760 | const char *chp; | |
1761 | unsigned int index = 0; | |
1762 | unsigned int i = 1; | |
1763 | ||
1764 | /* Remove varobj from hash table */ | |
1765 | for (chp = var->obj_name; *chp; chp++) | |
1766 | { | |
1767 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1768 | } | |
1769 | ||
1770 | cv = *(varobj_table + index); | |
1771 | prev = NULL; | |
1772 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1773 | { | |
1774 | prev = cv; | |
1775 | cv = cv->next; | |
1776 | } | |
1777 | ||
1778 | if (varobjdebug) | |
1779 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1780 | ||
1781 | if (cv == NULL) | |
1782 | { | |
72330bd6 AC |
1783 | warning |
1784 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1785 | var->obj_name); | |
8b93c638 JM |
1786 | return; |
1787 | } | |
1788 | ||
1789 | if (prev == NULL) | |
1790 | *(varobj_table + index) = cv->next; | |
1791 | else | |
1792 | prev->next = cv->next; | |
1793 | ||
b8c9b27d | 1794 | xfree (cv); |
8b93c638 JM |
1795 | |
1796 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1797 | if (is_root_p (var)) |
8b93c638 JM |
1798 | { |
1799 | /* Remove from list of root variables */ | |
1800 | if (rootlist == var->root) | |
1801 | rootlist = var->root->next; | |
1802 | else | |
1803 | { | |
1804 | prer = NULL; | |
1805 | cr = rootlist; | |
1806 | while ((cr != NULL) && (cr->rootvar != var)) | |
1807 | { | |
1808 | prer = cr; | |
1809 | cr = cr->next; | |
1810 | } | |
1811 | if (cr == NULL) | |
1812 | { | |
72330bd6 AC |
1813 | warning |
1814 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1815 | var->obj_name); | |
8b93c638 JM |
1816 | return; |
1817 | } | |
1818 | if (prer == NULL) | |
1819 | rootlist = NULL; | |
1820 | else | |
1821 | prer->next = cr->next; | |
1822 | } | |
1823 | rootcount--; | |
1824 | } | |
1825 | ||
1826 | } | |
1827 | ||
8b93c638 JM |
1828 | /* Create and install a child of the parent of the given name */ |
1829 | static struct varobj * | |
fba45db2 | 1830 | create_child (struct varobj *parent, int index, char *name) |
b6313243 TT |
1831 | { |
1832 | return create_child_with_value (parent, index, name, | |
1833 | value_of_child (parent, index)); | |
1834 | } | |
1835 | ||
1836 | static struct varobj * | |
1837 | create_child_with_value (struct varobj *parent, int index, const char *name, | |
1838 | struct value *value) | |
8b93c638 JM |
1839 | { |
1840 | struct varobj *child; | |
1841 | char *childs_name; | |
1842 | ||
1843 | child = new_variable (); | |
1844 | ||
1845 | /* name is allocated by name_of_child */ | |
b6313243 TT |
1846 | /* FIXME: xstrdup should not be here. */ |
1847 | child->name = xstrdup (name); | |
8b93c638 | 1848 | child->index = index; |
8b93c638 JM |
1849 | child->parent = parent; |
1850 | child->root = parent->root; | |
b435e160 | 1851 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1852 | child->obj_name = childs_name; |
1853 | install_variable (child); | |
1854 | ||
acd65feb VP |
1855 | /* Compute the type of the child. Must do this before |
1856 | calling install_new_value. */ | |
1857 | if (value != NULL) | |
1858 | /* If the child had no evaluation errors, var->value | |
1859 | will be non-NULL and contain a valid type. */ | |
1860 | child->type = value_type (value); | |
1861 | else | |
1862 | /* Otherwise, we must compute the type. */ | |
1863 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1864 | child->index); | |
1865 | install_new_value (child, value, 1); | |
1866 | ||
8b93c638 JM |
1867 | return child; |
1868 | } | |
8b93c638 JM |
1869 | \f |
1870 | ||
1871 | /* | |
1872 | * Miscellaneous utility functions. | |
1873 | */ | |
1874 | ||
1875 | /* Allocate memory and initialize a new variable */ | |
1876 | static struct varobj * | |
1877 | new_variable (void) | |
1878 | { | |
1879 | struct varobj *var; | |
1880 | ||
1881 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1882 | var->name = NULL; | |
02142340 | 1883 | var->path_expr = NULL; |
8b93c638 JM |
1884 | var->obj_name = NULL; |
1885 | var->index = -1; | |
1886 | var->type = NULL; | |
1887 | var->value = NULL; | |
8b93c638 JM |
1888 | var->num_children = -1; |
1889 | var->parent = NULL; | |
1890 | var->children = NULL; | |
1891 | var->format = 0; | |
1892 | var->root = NULL; | |
fb9b6b35 | 1893 | var->updated = 0; |
85265413 | 1894 | var->print_value = NULL; |
25d5ea92 VP |
1895 | var->frozen = 0; |
1896 | var->not_fetched = 0; | |
b6313243 TT |
1897 | var->children_requested = 0; |
1898 | var->pretty_printer = 0; | |
8b93c638 JM |
1899 | |
1900 | return var; | |
1901 | } | |
1902 | ||
1903 | /* Allocate memory and initialize a new root variable */ | |
1904 | static struct varobj * | |
1905 | new_root_variable (void) | |
1906 | { | |
1907 | struct varobj *var = new_variable (); | |
1908 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1909 | var->root->lang = NULL; | |
1910 | var->root->exp = NULL; | |
1911 | var->root->valid_block = NULL; | |
7a424e99 | 1912 | var->root->frame = null_frame_id; |
a5defcdc | 1913 | var->root->floating = 0; |
8b93c638 | 1914 | var->root->rootvar = NULL; |
8756216b | 1915 | var->root->is_valid = 1; |
8b93c638 JM |
1916 | |
1917 | return var; | |
1918 | } | |
1919 | ||
1920 | /* Free any allocated memory associated with VAR. */ | |
1921 | static void | |
fba45db2 | 1922 | free_variable (struct varobj *var) |
8b93c638 | 1923 | { |
36746093 JK |
1924 | value_free (var->value); |
1925 | ||
8b93c638 | 1926 | /* Free the expression if this is a root variable. */ |
b2c2bd75 | 1927 | if (is_root_p (var)) |
8b93c638 | 1928 | { |
3038237c | 1929 | xfree (var->root->exp); |
8038e1e2 | 1930 | xfree (var->root); |
8b93c638 JM |
1931 | } |
1932 | ||
b6313243 TT |
1933 | #if HAVE_PYTHON |
1934 | { | |
1935 | PyGILState_STATE state = PyGILState_Ensure (); | |
1936 | Py_XDECREF (var->pretty_printer); | |
1937 | PyGILState_Release (state); | |
1938 | } | |
1939 | #endif | |
1940 | ||
8038e1e2 AC |
1941 | xfree (var->name); |
1942 | xfree (var->obj_name); | |
85265413 | 1943 | xfree (var->print_value); |
02142340 | 1944 | xfree (var->path_expr); |
8038e1e2 | 1945 | xfree (var); |
8b93c638 JM |
1946 | } |
1947 | ||
74b7792f AC |
1948 | static void |
1949 | do_free_variable_cleanup (void *var) | |
1950 | { | |
1951 | free_variable (var); | |
1952 | } | |
1953 | ||
1954 | static struct cleanup * | |
1955 | make_cleanup_free_variable (struct varobj *var) | |
1956 | { | |
1957 | return make_cleanup (do_free_variable_cleanup, var); | |
1958 | } | |
1959 | ||
6766a268 DJ |
1960 | /* This returns the type of the variable. It also skips past typedefs |
1961 | to return the real type of the variable. | |
94b66fa7 KS |
1962 | |
1963 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1964 | except within get_target_type and get_type. */ | |
8b93c638 | 1965 | static struct type * |
fba45db2 | 1966 | get_type (struct varobj *var) |
8b93c638 JM |
1967 | { |
1968 | struct type *type; | |
1969 | type = var->type; | |
1970 | ||
6766a268 DJ |
1971 | if (type != NULL) |
1972 | type = check_typedef (type); | |
8b93c638 JM |
1973 | |
1974 | return type; | |
1975 | } | |
1976 | ||
6e2a9270 VP |
1977 | /* Return the type of the value that's stored in VAR, |
1978 | or that would have being stored there if the | |
1979 | value were accessible. | |
1980 | ||
1981 | This differs from VAR->type in that VAR->type is always | |
1982 | the true type of the expession in the source language. | |
1983 | The return value of this function is the type we're | |
1984 | actually storing in varobj, and using for displaying | |
1985 | the values and for comparing previous and new values. | |
1986 | ||
1987 | For example, top-level references are always stripped. */ | |
1988 | static struct type * | |
1989 | get_value_type (struct varobj *var) | |
1990 | { | |
1991 | struct type *type; | |
1992 | ||
1993 | if (var->value) | |
1994 | type = value_type (var->value); | |
1995 | else | |
1996 | type = var->type; | |
1997 | ||
1998 | type = check_typedef (type); | |
1999 | ||
2000 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
2001 | type = get_target_type (type); | |
2002 | ||
2003 | type = check_typedef (type); | |
2004 | ||
2005 | return type; | |
2006 | } | |
2007 | ||
8b93c638 | 2008 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
2009 | past typedefs, just like get_type (). |
2010 | ||
2011 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
2012 | except within get_target_type and get_type. */ | |
8b93c638 | 2013 | static struct type * |
fba45db2 | 2014 | get_target_type (struct type *type) |
8b93c638 JM |
2015 | { |
2016 | if (type != NULL) | |
2017 | { | |
2018 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
2019 | if (type != NULL) |
2020 | type = check_typedef (type); | |
8b93c638 JM |
2021 | } |
2022 | ||
2023 | return type; | |
2024 | } | |
2025 | ||
2026 | /* What is the default display for this variable? We assume that | |
2027 | everything is "natural". Any exceptions? */ | |
2028 | static enum varobj_display_formats | |
fba45db2 | 2029 | variable_default_display (struct varobj *var) |
8b93c638 JM |
2030 | { |
2031 | return FORMAT_NATURAL; | |
2032 | } | |
2033 | ||
8b93c638 JM |
2034 | /* FIXME: The following should be generic for any pointer */ |
2035 | static void | |
fba45db2 | 2036 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
2037 | { |
2038 | struct cpstack *s; | |
2039 | ||
2040 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
2041 | s->name = name; | |
2042 | s->next = *pstack; | |
2043 | *pstack = s; | |
2044 | } | |
2045 | ||
2046 | /* FIXME: The following should be generic for any pointer */ | |
2047 | static char * | |
fba45db2 | 2048 | cppop (struct cpstack **pstack) |
8b93c638 JM |
2049 | { |
2050 | struct cpstack *s; | |
2051 | char *v; | |
2052 | ||
2053 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
2054 | return NULL; | |
2055 | ||
2056 | s = *pstack; | |
2057 | v = s->name; | |
2058 | *pstack = (*pstack)->next; | |
b8c9b27d | 2059 | xfree (s); |
8b93c638 JM |
2060 | |
2061 | return v; | |
2062 | } | |
2063 | \f | |
2064 | /* | |
2065 | * Language-dependencies | |
2066 | */ | |
2067 | ||
2068 | /* Common entry points */ | |
2069 | ||
2070 | /* Get the language of variable VAR. */ | |
2071 | static enum varobj_languages | |
fba45db2 | 2072 | variable_language (struct varobj *var) |
8b93c638 JM |
2073 | { |
2074 | enum varobj_languages lang; | |
2075 | ||
2076 | switch (var->root->exp->language_defn->la_language) | |
2077 | { | |
2078 | default: | |
2079 | case language_c: | |
2080 | lang = vlang_c; | |
2081 | break; | |
2082 | case language_cplus: | |
2083 | lang = vlang_cplus; | |
2084 | break; | |
2085 | case language_java: | |
2086 | lang = vlang_java; | |
2087 | break; | |
2088 | } | |
2089 | ||
2090 | return lang; | |
2091 | } | |
2092 | ||
2093 | /* Return the number of children for a given variable. | |
2094 | The result of this function is defined by the language | |
2095 | implementation. The number of children returned by this function | |
2096 | is the number of children that the user will see in the variable | |
2097 | display. */ | |
2098 | static int | |
fba45db2 | 2099 | number_of_children (struct varobj *var) |
8b93c638 JM |
2100 | { |
2101 | return (*var->root->lang->number_of_children) (var);; | |
2102 | } | |
2103 | ||
2104 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
2105 | static char * | |
fba45db2 | 2106 | name_of_variable (struct varobj *var) |
8b93c638 JM |
2107 | { |
2108 | return (*var->root->lang->name_of_variable) (var); | |
2109 | } | |
2110 | ||
2111 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
2112 | static char * | |
fba45db2 | 2113 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
2114 | { |
2115 | return (*var->root->lang->name_of_child) (var, index); | |
2116 | } | |
2117 | ||
a5defcdc VP |
2118 | /* What is the ``struct value *'' of the root variable VAR? |
2119 | For floating variable object, evaluation can get us a value | |
2120 | of different type from what is stored in varobj already. In | |
2121 | that case: | |
2122 | - *type_changed will be set to 1 | |
2123 | - old varobj will be freed, and new one will be | |
2124 | created, with the same name. | |
2125 | - *var_handle will be set to the new varobj | |
2126 | Otherwise, *type_changed will be set to 0. */ | |
30b28db1 | 2127 | static struct value * |
fba45db2 | 2128 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 2129 | { |
73a93a32 JI |
2130 | struct varobj *var; |
2131 | ||
2132 | if (var_handle == NULL) | |
2133 | return NULL; | |
2134 | ||
2135 | var = *var_handle; | |
2136 | ||
2137 | /* This should really be an exception, since this should | |
2138 | only get called with a root variable. */ | |
2139 | ||
b2c2bd75 | 2140 | if (!is_root_p (var)) |
73a93a32 JI |
2141 | return NULL; |
2142 | ||
a5defcdc | 2143 | if (var->root->floating) |
73a93a32 JI |
2144 | { |
2145 | struct varobj *tmp_var; | |
2146 | char *old_type, *new_type; | |
6225abfa | 2147 | |
73a93a32 JI |
2148 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
2149 | USE_SELECTED_FRAME); | |
2150 | if (tmp_var == NULL) | |
2151 | { | |
2152 | return NULL; | |
2153 | } | |
6225abfa | 2154 | old_type = varobj_get_type (var); |
73a93a32 | 2155 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 2156 | if (strcmp (old_type, new_type) == 0) |
73a93a32 | 2157 | { |
fcacd99f VP |
2158 | /* The expression presently stored inside var->root->exp |
2159 | remembers the locations of local variables relatively to | |
2160 | the frame where the expression was created (in DWARF location | |
2161 | button, for example). Naturally, those locations are not | |
2162 | correct in other frames, so update the expression. */ | |
2163 | ||
2164 | struct expression *tmp_exp = var->root->exp; | |
2165 | var->root->exp = tmp_var->root->exp; | |
2166 | tmp_var->root->exp = tmp_exp; | |
2167 | ||
73a93a32 JI |
2168 | varobj_delete (tmp_var, NULL, 0); |
2169 | *type_changed = 0; | |
2170 | } | |
2171 | else | |
2172 | { | |
1b36a34b | 2173 | tmp_var->obj_name = xstrdup (var->obj_name); |
a5defcdc VP |
2174 | varobj_delete (var, NULL, 0); |
2175 | ||
73a93a32 JI |
2176 | install_variable (tmp_var); |
2177 | *var_handle = tmp_var; | |
705da579 | 2178 | var = *var_handle; |
73a93a32 JI |
2179 | *type_changed = 1; |
2180 | } | |
74dddad3 MS |
2181 | xfree (old_type); |
2182 | xfree (new_type); | |
73a93a32 JI |
2183 | } |
2184 | else | |
2185 | { | |
2186 | *type_changed = 0; | |
2187 | } | |
2188 | ||
2189 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
2190 | } |
2191 | ||
30b28db1 AC |
2192 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
2193 | static struct value * | |
fba45db2 | 2194 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 2195 | { |
30b28db1 | 2196 | struct value *value; |
8b93c638 JM |
2197 | |
2198 | value = (*parent->root->lang->value_of_child) (parent, index); | |
2199 | ||
8b93c638 JM |
2200 | return value; |
2201 | } | |
2202 | ||
8b93c638 JM |
2203 | /* GDB already has a command called "value_of_variable". Sigh. */ |
2204 | static char * | |
de051565 | 2205 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2206 | { |
8756216b | 2207 | if (var->root->is_valid) |
de051565 | 2208 | return (*var->root->lang->value_of_variable) (var, format); |
8756216b DP |
2209 | else |
2210 | return NULL; | |
8b93c638 JM |
2211 | } |
2212 | ||
85265413 | 2213 | static char * |
b6313243 TT |
2214 | value_get_print_value (struct value *value, enum varobj_display_formats format, |
2215 | PyObject *value_formatter) | |
85265413 NR |
2216 | { |
2217 | long dummy; | |
57e66780 DJ |
2218 | struct ui_file *stb; |
2219 | struct cleanup *old_chain; | |
b6313243 | 2220 | char *thevalue = NULL; |
79a45b7d | 2221 | struct value_print_options opts; |
57e66780 DJ |
2222 | |
2223 | if (value == NULL) | |
2224 | return NULL; | |
2225 | ||
b6313243 TT |
2226 | #if HAVE_PYTHON |
2227 | { | |
2228 | PyGILState_STATE state = PyGILState_Ensure (); | |
2229 | if (value_formatter && PyObject_HasAttr (value_formatter, | |
2230 | gdbpy_to_string_cst)) | |
2231 | { | |
2232 | char *hint; | |
2233 | struct value *replacement; | |
2234 | int string_print = 0; | |
2235 | ||
2236 | hint = gdbpy_get_display_hint (value_formatter); | |
2237 | if (hint) | |
2238 | { | |
2239 | if (!strcmp (hint, "string")) | |
2240 | string_print = 1; | |
2241 | xfree (hint); | |
2242 | } | |
2243 | ||
2244 | thevalue = apply_varobj_pretty_printer (value_formatter, | |
2245 | &replacement); | |
2246 | if (thevalue && !string_print) | |
2247 | { | |
2248 | PyGILState_Release (state); | |
2249 | return thevalue; | |
2250 | } | |
2251 | if (replacement) | |
2252 | value = replacement; | |
2253 | } | |
2254 | PyGILState_Release (state); | |
2255 | } | |
2256 | #endif | |
2257 | ||
57e66780 DJ |
2258 | stb = mem_fileopen (); |
2259 | old_chain = make_cleanup_ui_file_delete (stb); | |
2260 | ||
79a45b7d TT |
2261 | get_formatted_print_options (&opts, format_code[(int) format]); |
2262 | opts.deref_ref = 0; | |
b6313243 TT |
2263 | opts.raw = 1; |
2264 | if (thevalue) | |
2265 | { | |
50810684 | 2266 | struct gdbarch *gdbarch = get_type_arch (value_type (value)); |
b6313243 | 2267 | make_cleanup (xfree, thevalue); |
50810684 | 2268 | LA_PRINT_STRING (stb, builtin_type (gdbarch)->builtin_char, |
b6313243 TT |
2269 | (gdb_byte *) thevalue, strlen (thevalue), |
2270 | 0, &opts); | |
2271 | } | |
2272 | else | |
2273 | common_val_print (value, stb, 0, &opts, current_language); | |
85265413 | 2274 | thevalue = ui_file_xstrdup (stb, &dummy); |
57e66780 | 2275 | |
85265413 NR |
2276 | do_cleanups (old_chain); |
2277 | return thevalue; | |
2278 | } | |
2279 | ||
340a7723 NR |
2280 | int |
2281 | varobj_editable_p (struct varobj *var) | |
2282 | { | |
2283 | struct type *type; | |
2284 | struct value *value; | |
2285 | ||
2286 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
2287 | return 0; | |
2288 | ||
2289 | type = get_value_type (var); | |
2290 | ||
2291 | switch (TYPE_CODE (type)) | |
2292 | { | |
2293 | case TYPE_CODE_STRUCT: | |
2294 | case TYPE_CODE_UNION: | |
2295 | case TYPE_CODE_ARRAY: | |
2296 | case TYPE_CODE_FUNC: | |
2297 | case TYPE_CODE_METHOD: | |
2298 | return 0; | |
2299 | break; | |
2300 | ||
2301 | default: | |
2302 | return 1; | |
2303 | break; | |
2304 | } | |
2305 | } | |
2306 | ||
acd65feb VP |
2307 | /* Return non-zero if changes in value of VAR |
2308 | must be detected and reported by -var-update. | |
2309 | Return zero is -var-update should never report | |
2310 | changes of such values. This makes sense for structures | |
2311 | (since the changes in children values will be reported separately), | |
2312 | or for artifical objects (like 'public' pseudo-field in C++). | |
2313 | ||
2314 | Return value of 0 means that gdb need not call value_fetch_lazy | |
2315 | for the value of this variable object. */ | |
8b93c638 | 2316 | static int |
b2c2bd75 | 2317 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
2318 | { |
2319 | int r; | |
2320 | struct type *type; | |
2321 | ||
2322 | if (CPLUS_FAKE_CHILD (var)) | |
2323 | return 0; | |
2324 | ||
6e2a9270 | 2325 | type = get_value_type (var); |
8b93c638 JM |
2326 | |
2327 | switch (TYPE_CODE (type)) | |
2328 | { | |
72330bd6 AC |
2329 | case TYPE_CODE_STRUCT: |
2330 | case TYPE_CODE_UNION: | |
2331 | case TYPE_CODE_ARRAY: | |
2332 | r = 0; | |
2333 | break; | |
8b93c638 | 2334 | |
72330bd6 AC |
2335 | default: |
2336 | r = 1; | |
8b93c638 JM |
2337 | } |
2338 | ||
2339 | return r; | |
2340 | } | |
2341 | ||
5a413362 VP |
2342 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
2343 | selected frame, and not bound to thread/frame. Such variable objects | |
2344 | are created using '@' as frame specifier to -var-create. */ | |
2345 | int | |
2346 | varobj_floating_p (struct varobj *var) | |
2347 | { | |
2348 | return var->root->floating; | |
2349 | } | |
2350 | ||
2024f65a VP |
2351 | /* Given the value and the type of a variable object, |
2352 | adjust the value and type to those necessary | |
2353 | for getting children of the variable object. | |
2354 | This includes dereferencing top-level references | |
2355 | to all types and dereferencing pointers to | |
2356 | structures. | |
2357 | ||
2358 | Both TYPE and *TYPE should be non-null. VALUE | |
2359 | can be null if we want to only translate type. | |
2360 | *VALUE can be null as well -- if the parent | |
02142340 VP |
2361 | value is not known. |
2362 | ||
2363 | If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1 | |
b6313243 | 2364 | depending on whether pointer was dereferenced |
02142340 | 2365 | in this function. */ |
2024f65a VP |
2366 | static void |
2367 | adjust_value_for_child_access (struct value **value, | |
02142340 VP |
2368 | struct type **type, |
2369 | int *was_ptr) | |
2024f65a VP |
2370 | { |
2371 | gdb_assert (type && *type); | |
2372 | ||
02142340 VP |
2373 | if (was_ptr) |
2374 | *was_ptr = 0; | |
2375 | ||
2024f65a VP |
2376 | *type = check_typedef (*type); |
2377 | ||
2378 | /* The type of value stored in varobj, that is passed | |
2379 | to us, is already supposed to be | |
2380 | reference-stripped. */ | |
2381 | ||
2382 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
2383 | ||
2384 | /* Pointers to structures are treated just like | |
2385 | structures when accessing children. Don't | |
2386 | dererences pointers to other types. */ | |
2387 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
2388 | { | |
2389 | struct type *target_type = get_target_type (*type); | |
2390 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
2391 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
2392 | { | |
2393 | if (value && *value) | |
3f4178d6 DJ |
2394 | { |
2395 | int success = gdb_value_ind (*value, value); | |
2396 | if (!success) | |
2397 | *value = NULL; | |
2398 | } | |
2024f65a | 2399 | *type = target_type; |
02142340 VP |
2400 | if (was_ptr) |
2401 | *was_ptr = 1; | |
2024f65a VP |
2402 | } |
2403 | } | |
2404 | ||
2405 | /* The 'get_target_type' function calls check_typedef on | |
2406 | result, so we can immediately check type code. No | |
2407 | need to call check_typedef here. */ | |
2408 | } | |
2409 | ||
8b93c638 JM |
2410 | /* C */ |
2411 | static int | |
fba45db2 | 2412 | c_number_of_children (struct varobj *var) |
8b93c638 | 2413 | { |
2024f65a VP |
2414 | struct type *type = get_value_type (var); |
2415 | int children = 0; | |
8b93c638 | 2416 | struct type *target; |
8b93c638 | 2417 | |
02142340 | 2418 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 | 2419 | target = get_target_type (type); |
8b93c638 JM |
2420 | |
2421 | switch (TYPE_CODE (type)) | |
2422 | { | |
2423 | case TYPE_CODE_ARRAY: | |
2424 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
d78df370 | 2425 | && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
8b93c638 JM |
2426 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
2427 | else | |
74a44383 DJ |
2428 | /* If we don't know how many elements there are, don't display |
2429 | any. */ | |
2430 | children = 0; | |
8b93c638 JM |
2431 | break; |
2432 | ||
2433 | case TYPE_CODE_STRUCT: | |
2434 | case TYPE_CODE_UNION: | |
2435 | children = TYPE_NFIELDS (type); | |
2436 | break; | |
2437 | ||
2438 | case TYPE_CODE_PTR: | |
2024f65a VP |
2439 | /* The type here is a pointer to non-struct. Typically, pointers |
2440 | have one child, except for function ptrs, which have no children, | |
2441 | and except for void*, as we don't know what to show. | |
2442 | ||
0755e6c1 FN |
2443 | We can show char* so we allow it to be dereferenced. If you decide |
2444 | to test for it, please mind that a little magic is necessary to | |
2445 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
2446 | TYPE_NAME == "char" */ | |
2024f65a VP |
2447 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
2448 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
2449 | children = 0; | |
2450 | else | |
2451 | children = 1; | |
8b93c638 JM |
2452 | break; |
2453 | ||
2454 | default: | |
2455 | /* Other types have no children */ | |
2456 | break; | |
2457 | } | |
2458 | ||
2459 | return children; | |
2460 | } | |
2461 | ||
2462 | static char * | |
fba45db2 | 2463 | c_name_of_variable (struct varobj *parent) |
8b93c638 | 2464 | { |
1b36a34b | 2465 | return xstrdup (parent->name); |
8b93c638 JM |
2466 | } |
2467 | ||
bbec2603 VP |
2468 | /* Return the value of element TYPE_INDEX of a structure |
2469 | value VALUE. VALUE's type should be a structure, | |
2470 | or union, or a typedef to struct/union. | |
2471 | ||
2472 | Returns NULL if getting the value fails. Never throws. */ | |
2473 | static struct value * | |
2474 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 2475 | { |
bbec2603 VP |
2476 | struct value *result = NULL; |
2477 | volatile struct gdb_exception e; | |
8b93c638 | 2478 | |
bbec2603 VP |
2479 | struct type *type = value_type (value); |
2480 | type = check_typedef (type); | |
2481 | ||
2482 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2483 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 2484 | |
bbec2603 VP |
2485 | TRY_CATCH (e, RETURN_MASK_ERROR) |
2486 | { | |
d6a843b5 | 2487 | if (field_is_static (&TYPE_FIELD (type, type_index))) |
bbec2603 VP |
2488 | result = value_static_field (type, type_index); |
2489 | else | |
2490 | result = value_primitive_field (value, 0, type_index, type); | |
2491 | } | |
2492 | if (e.reason < 0) | |
2493 | { | |
2494 | return NULL; | |
2495 | } | |
2496 | else | |
2497 | { | |
2498 | return result; | |
2499 | } | |
2500 | } | |
2501 | ||
2502 | /* Obtain the information about child INDEX of the variable | |
2503 | object PARENT. | |
2504 | If CNAME is not null, sets *CNAME to the name of the child relative | |
2505 | to the parent. | |
2506 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
2507 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
2508 | ||
2509 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
2510 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
2511 | to NULL. */ | |
2512 | static void | |
2513 | c_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2514 | char **cname, struct value **cvalue, struct type **ctype, |
2515 | char **cfull_expression) | |
bbec2603 VP |
2516 | { |
2517 | struct value *value = parent->value; | |
2024f65a | 2518 | struct type *type = get_value_type (parent); |
02142340 VP |
2519 | char *parent_expression = NULL; |
2520 | int was_ptr; | |
bbec2603 VP |
2521 | |
2522 | if (cname) | |
2523 | *cname = NULL; | |
2524 | if (cvalue) | |
2525 | *cvalue = NULL; | |
2526 | if (ctype) | |
2527 | *ctype = NULL; | |
02142340 VP |
2528 | if (cfull_expression) |
2529 | { | |
2530 | *cfull_expression = NULL; | |
2531 | parent_expression = varobj_get_path_expr (parent); | |
2532 | } | |
2533 | adjust_value_for_child_access (&value, &type, &was_ptr); | |
bbec2603 | 2534 | |
8b93c638 JM |
2535 | switch (TYPE_CODE (type)) |
2536 | { | |
2537 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
2538 | if (cname) |
2539 | *cname = xstrprintf ("%d", index | |
2540 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2541 | ||
2542 | if (cvalue && value) | |
2543 | { | |
2544 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
2497b498 | 2545 | gdb_value_subscript (value, real_index, cvalue); |
bbec2603 VP |
2546 | } |
2547 | ||
2548 | if (ctype) | |
2549 | *ctype = get_target_type (type); | |
2550 | ||
02142340 VP |
2551 | if (cfull_expression) |
2552 | *cfull_expression = xstrprintf ("(%s)[%d]", parent_expression, | |
2553 | index | |
2554 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2555 | ||
2556 | ||
8b93c638 JM |
2557 | break; |
2558 | ||
2559 | case TYPE_CODE_STRUCT: | |
2560 | case TYPE_CODE_UNION: | |
bbec2603 | 2561 | if (cname) |
1b36a34b | 2562 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); |
bbec2603 VP |
2563 | |
2564 | if (cvalue && value) | |
2565 | { | |
2566 | /* For C, varobj index is the same as type index. */ | |
2567 | *cvalue = value_struct_element_index (value, index); | |
2568 | } | |
2569 | ||
2570 | if (ctype) | |
2571 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2572 | ||
02142340 VP |
2573 | if (cfull_expression) |
2574 | { | |
2575 | char *join = was_ptr ? "->" : "."; | |
2576 | *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, join, | |
2577 | TYPE_FIELD_NAME (type, index)); | |
2578 | } | |
2579 | ||
8b93c638 JM |
2580 | break; |
2581 | ||
2582 | case TYPE_CODE_PTR: | |
bbec2603 VP |
2583 | if (cname) |
2584 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 2585 | |
bbec2603 | 2586 | if (cvalue && value) |
3f4178d6 DJ |
2587 | { |
2588 | int success = gdb_value_ind (value, cvalue); | |
2589 | if (!success) | |
2590 | *cvalue = NULL; | |
2591 | } | |
bbec2603 | 2592 | |
2024f65a VP |
2593 | /* Don't use get_target_type because it calls |
2594 | check_typedef and here, we want to show the true | |
2595 | declared type of the variable. */ | |
bbec2603 | 2596 | if (ctype) |
2024f65a | 2597 | *ctype = TYPE_TARGET_TYPE (type); |
02142340 VP |
2598 | |
2599 | if (cfull_expression) | |
2600 | *cfull_expression = xstrprintf ("*(%s)", parent_expression); | |
bbec2603 | 2601 | |
8b93c638 JM |
2602 | break; |
2603 | ||
2604 | default: | |
2605 | /* This should not happen */ | |
bbec2603 VP |
2606 | if (cname) |
2607 | *cname = xstrdup ("???"); | |
02142340 VP |
2608 | if (cfull_expression) |
2609 | *cfull_expression = xstrdup ("???"); | |
bbec2603 | 2610 | /* Don't set value and type, we don't know then. */ |
8b93c638 | 2611 | } |
bbec2603 | 2612 | } |
8b93c638 | 2613 | |
bbec2603 VP |
2614 | static char * |
2615 | c_name_of_child (struct varobj *parent, int index) | |
2616 | { | |
2617 | char *name; | |
02142340 | 2618 | c_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2619 | return name; |
2620 | } | |
2621 | ||
02142340 VP |
2622 | static char * |
2623 | c_path_expr_of_child (struct varobj *child) | |
2624 | { | |
2625 | c_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2626 | &child->path_expr); | |
2627 | return child->path_expr; | |
2628 | } | |
2629 | ||
c5b48eac VP |
2630 | /* If frame associated with VAR can be found, switch |
2631 | to it and return 1. Otherwise, return 0. */ | |
2632 | static int | |
2633 | check_scope (struct varobj *var) | |
2634 | { | |
2635 | struct frame_info *fi; | |
2636 | int scope; | |
2637 | ||
2638 | fi = frame_find_by_id (var->root->frame); | |
2639 | scope = fi != NULL; | |
2640 | ||
2641 | if (fi) | |
2642 | { | |
2643 | CORE_ADDR pc = get_frame_pc (fi); | |
2644 | if (pc < BLOCK_START (var->root->valid_block) || | |
2645 | pc >= BLOCK_END (var->root->valid_block)) | |
2646 | scope = 0; | |
2647 | else | |
2648 | select_frame (fi); | |
2649 | } | |
2650 | return scope; | |
2651 | } | |
2652 | ||
30b28db1 | 2653 | static struct value * |
fba45db2 | 2654 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 2655 | { |
5e572bb4 | 2656 | struct value *new_val = NULL; |
73a93a32 | 2657 | struct varobj *var = *var_handle; |
8b93c638 | 2658 | struct frame_info *fi; |
c5b48eac | 2659 | int within_scope = 0; |
6208b47d VP |
2660 | struct cleanup *back_to; |
2661 | ||
73a93a32 | 2662 | /* Only root variables can be updated... */ |
b2c2bd75 | 2663 | if (!is_root_p (var)) |
73a93a32 JI |
2664 | /* Not a root var */ |
2665 | return NULL; | |
2666 | ||
4f8d22e3 | 2667 | back_to = make_cleanup_restore_current_thread (); |
72330bd6 | 2668 | |
8b93c638 | 2669 | /* Determine whether the variable is still around. */ |
a5defcdc | 2670 | if (var->root->valid_block == NULL || var->root->floating) |
8b93c638 | 2671 | within_scope = 1; |
c5b48eac VP |
2672 | else if (var->root->thread_id == 0) |
2673 | { | |
2674 | /* The program was single-threaded when the variable object was | |
2675 | created. Technically, it's possible that the program became | |
2676 | multi-threaded since then, but we don't support such | |
2677 | scenario yet. */ | |
2678 | within_scope = check_scope (var); | |
2679 | } | |
8b93c638 JM |
2680 | else |
2681 | { | |
c5b48eac VP |
2682 | ptid_t ptid = thread_id_to_pid (var->root->thread_id); |
2683 | if (in_thread_list (ptid)) | |
d2353924 | 2684 | { |
c5b48eac VP |
2685 | switch_to_thread (ptid); |
2686 | within_scope = check_scope (var); | |
2687 | } | |
8b93c638 | 2688 | } |
72330bd6 | 2689 | |
8b93c638 JM |
2690 | if (within_scope) |
2691 | { | |
73a93a32 | 2692 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
2693 | expression fails we want to just return NULL. */ |
2694 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
2695 | return new_val; |
2696 | } | |
2697 | ||
6208b47d VP |
2698 | do_cleanups (back_to); |
2699 | ||
8b93c638 JM |
2700 | return NULL; |
2701 | } | |
2702 | ||
30b28db1 | 2703 | static struct value * |
fba45db2 | 2704 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2705 | { |
bbec2603 | 2706 | struct value *value = NULL; |
02142340 | 2707 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2708 | |
2709 | return value; | |
2710 | } | |
2711 | ||
2712 | static struct type * | |
fba45db2 | 2713 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2714 | { |
bbec2603 | 2715 | struct type *type = NULL; |
02142340 | 2716 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2717 | return type; |
2718 | } | |
2719 | ||
8b93c638 | 2720 | static char * |
de051565 | 2721 | c_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 2722 | { |
14b3d9c9 JB |
2723 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2724 | it will print out its children instead of "{...}". So we need to | |
2725 | catch that case explicitly. */ | |
2726 | struct type *type = get_type (var); | |
e64d9b3d | 2727 | |
b6313243 TT |
2728 | /* If we have a custom formatter, return whatever string it has |
2729 | produced. */ | |
2730 | if (var->pretty_printer && var->print_value) | |
2731 | return xstrdup (var->print_value); | |
2732 | ||
14b3d9c9 JB |
2733 | /* Strip top-level references. */ |
2734 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2735 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2736 | ||
2737 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2738 | { |
2739 | case TYPE_CODE_STRUCT: | |
2740 | case TYPE_CODE_UNION: | |
2741 | return xstrdup ("{...}"); | |
2742 | /* break; */ | |
2743 | ||
2744 | case TYPE_CODE_ARRAY: | |
2745 | { | |
e64d9b3d | 2746 | char *number; |
b435e160 | 2747 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2748 | return (number); |
8b93c638 JM |
2749 | } |
2750 | /* break; */ | |
2751 | ||
2752 | default: | |
2753 | { | |
575bbeb6 KS |
2754 | if (var->value == NULL) |
2755 | { | |
2756 | /* This can happen if we attempt to get the value of a struct | |
2757 | member when the parent is an invalid pointer. This is an | |
2758 | error condition, so we should tell the caller. */ | |
2759 | return NULL; | |
2760 | } | |
2761 | else | |
2762 | { | |
25d5ea92 VP |
2763 | if (var->not_fetched && value_lazy (var->value)) |
2764 | /* Frozen variable and no value yet. We don't | |
2765 | implicitly fetch the value. MI response will | |
2766 | use empty string for the value, which is OK. */ | |
2767 | return NULL; | |
2768 | ||
b2c2bd75 | 2769 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2770 | gdb_assert (!value_lazy (var->value)); |
de051565 MK |
2771 | |
2772 | /* If the specified format is the current one, | |
2773 | we can reuse print_value */ | |
2774 | if (format == var->format) | |
2775 | return xstrdup (var->print_value); | |
2776 | else | |
b6313243 TT |
2777 | return value_get_print_value (var->value, format, |
2778 | var->pretty_printer); | |
85265413 | 2779 | } |
e64d9b3d | 2780 | } |
8b93c638 JM |
2781 | } |
2782 | } | |
2783 | \f | |
2784 | ||
2785 | /* C++ */ | |
2786 | ||
2787 | static int | |
fba45db2 | 2788 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2789 | { |
2790 | struct type *type; | |
2791 | int children, dont_know; | |
2792 | ||
2793 | dont_know = 1; | |
2794 | children = 0; | |
2795 | ||
2796 | if (!CPLUS_FAKE_CHILD (var)) | |
2797 | { | |
2024f65a | 2798 | type = get_value_type (var); |
02142340 | 2799 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2800 | |
2801 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2802 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2803 | { |
2804 | int kids[3]; | |
2805 | ||
2806 | cplus_class_num_children (type, kids); | |
2807 | if (kids[v_public] != 0) | |
2808 | children++; | |
2809 | if (kids[v_private] != 0) | |
2810 | children++; | |
2811 | if (kids[v_protected] != 0) | |
2812 | children++; | |
2813 | ||
2814 | /* Add any baseclasses */ | |
2815 | children += TYPE_N_BASECLASSES (type); | |
2816 | dont_know = 0; | |
2817 | ||
2818 | /* FIXME: save children in var */ | |
2819 | } | |
2820 | } | |
2821 | else | |
2822 | { | |
2823 | int kids[3]; | |
2824 | ||
2024f65a | 2825 | type = get_value_type (var->parent); |
02142340 | 2826 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2827 | |
2828 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2829 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2830 | children = kids[v_public]; |
6e382aa3 | 2831 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2832 | children = kids[v_private]; |
2833 | else | |
2834 | children = kids[v_protected]; | |
2835 | dont_know = 0; | |
2836 | } | |
2837 | ||
2838 | if (dont_know) | |
2839 | children = c_number_of_children (var); | |
2840 | ||
2841 | return children; | |
2842 | } | |
2843 | ||
2844 | /* Compute # of public, private, and protected variables in this class. | |
2845 | That means we need to descend into all baseclasses and find out | |
2846 | how many are there, too. */ | |
2847 | static void | |
1669605f | 2848 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2849 | { |
2850 | int i; | |
2851 | ||
2852 | children[v_public] = 0; | |
2853 | children[v_private] = 0; | |
2854 | children[v_protected] = 0; | |
2855 | ||
2856 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2857 | { | |
2858 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2859 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2860 | continue; |
2861 | ||
2862 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2863 | children[v_protected]++; | |
2864 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2865 | children[v_private]++; | |
2866 | else | |
2867 | children[v_public]++; | |
2868 | } | |
2869 | } | |
2870 | ||
2871 | static char * | |
fba45db2 | 2872 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2873 | { |
2874 | return c_name_of_variable (parent); | |
2875 | } | |
2876 | ||
2024f65a VP |
2877 | enum accessibility { private_field, protected_field, public_field }; |
2878 | ||
2879 | /* Check if field INDEX of TYPE has the specified accessibility. | |
2880 | Return 0 if so and 1 otherwise. */ | |
2881 | static int | |
2882 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 2883 | { |
2024f65a VP |
2884 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
2885 | return 1; | |
2886 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
2887 | return 1; | |
2888 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
2889 | && !TYPE_FIELD_PROTECTED (type, index)) | |
2890 | return 1; | |
2891 | else | |
2892 | return 0; | |
2893 | } | |
2894 | ||
2895 | static void | |
2896 | cplus_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2897 | char **cname, struct value **cvalue, struct type **ctype, |
2898 | char **cfull_expression) | |
2024f65a | 2899 | { |
348144ba | 2900 | char *name = NULL; |
2024f65a | 2901 | struct value *value; |
8b93c638 | 2902 | struct type *type; |
02142340 VP |
2903 | int was_ptr; |
2904 | char *parent_expression = NULL; | |
8b93c638 | 2905 | |
2024f65a VP |
2906 | if (cname) |
2907 | *cname = NULL; | |
2908 | if (cvalue) | |
2909 | *cvalue = NULL; | |
2910 | if (ctype) | |
2911 | *ctype = NULL; | |
02142340 VP |
2912 | if (cfull_expression) |
2913 | *cfull_expression = NULL; | |
2024f65a | 2914 | |
8b93c638 JM |
2915 | if (CPLUS_FAKE_CHILD (parent)) |
2916 | { | |
2024f65a VP |
2917 | value = parent->parent->value; |
2918 | type = get_value_type (parent->parent); | |
02142340 VP |
2919 | if (cfull_expression) |
2920 | parent_expression = varobj_get_path_expr (parent->parent); | |
8b93c638 JM |
2921 | } |
2922 | else | |
2024f65a VP |
2923 | { |
2924 | value = parent->value; | |
2925 | type = get_value_type (parent); | |
02142340 VP |
2926 | if (cfull_expression) |
2927 | parent_expression = varobj_get_path_expr (parent); | |
2024f65a | 2928 | } |
8b93c638 | 2929 | |
02142340 | 2930 | adjust_value_for_child_access (&value, &type, &was_ptr); |
2024f65a VP |
2931 | |
2932 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
3f4178d6 | 2933 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
8b93c638 | 2934 | { |
02142340 | 2935 | char *join = was_ptr ? "->" : "."; |
8b93c638 JM |
2936 | if (CPLUS_FAKE_CHILD (parent)) |
2937 | { | |
6e382aa3 JJ |
2938 | /* The fields of the class type are ordered as they |
2939 | appear in the class. We are given an index for a | |
2940 | particular access control type ("public","protected", | |
2941 | or "private"). We must skip over fields that don't | |
2942 | have the access control we are looking for to properly | |
2943 | find the indexed field. */ | |
2944 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 2945 | enum accessibility acc = public_field; |
6e382aa3 | 2946 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 2947 | acc = private_field; |
6e382aa3 | 2948 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
2949 | acc = protected_field; |
2950 | ||
2951 | while (index >= 0) | |
6e382aa3 | 2952 | { |
2024f65a VP |
2953 | if (TYPE_VPTR_BASETYPE (type) == type |
2954 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2955 | ; /* ignore vptr */ | |
2956 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
2957 | --index; |
2958 | ++type_index; | |
6e382aa3 | 2959 | } |
2024f65a VP |
2960 | --type_index; |
2961 | ||
2962 | if (cname) | |
2963 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
2964 | ||
2965 | if (cvalue && value) | |
2966 | *cvalue = value_struct_element_index (value, type_index); | |
2967 | ||
2968 | if (ctype) | |
2969 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
02142340 VP |
2970 | |
2971 | if (cfull_expression) | |
2972 | *cfull_expression = xstrprintf ("((%s)%s%s)", parent_expression, | |
2973 | join, | |
2974 | TYPE_FIELD_NAME (type, type_index)); | |
2024f65a VP |
2975 | } |
2976 | else if (index < TYPE_N_BASECLASSES (type)) | |
2977 | { | |
2978 | /* This is a baseclass. */ | |
2979 | if (cname) | |
2980 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
2981 | ||
2982 | if (cvalue && value) | |
6e382aa3 | 2983 | { |
2024f65a | 2984 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
02142340 | 2985 | release_value (*cvalue); |
6e382aa3 JJ |
2986 | } |
2987 | ||
2024f65a VP |
2988 | if (ctype) |
2989 | { | |
2990 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2991 | } | |
02142340 VP |
2992 | |
2993 | if (cfull_expression) | |
2994 | { | |
2995 | char *ptr = was_ptr ? "*" : ""; | |
2996 | /* Cast the parent to the base' type. Note that in gdb, | |
2997 | expression like | |
2998 | (Base1)d | |
2999 | will create an lvalue, for all appearences, so we don't | |
3000 | need to use more fancy: | |
3001 | *(Base1*)(&d) | |
3002 | construct. */ | |
3003 | *cfull_expression = xstrprintf ("(%s(%s%s) %s)", | |
3004 | ptr, | |
3005 | TYPE_FIELD_NAME (type, index), | |
3006 | ptr, | |
3007 | parent_expression); | |
3008 | } | |
8b93c638 | 3009 | } |
8b93c638 JM |
3010 | else |
3011 | { | |
348144ba | 3012 | char *access = NULL; |
6e382aa3 | 3013 | int children[3]; |
2024f65a | 3014 | cplus_class_num_children (type, children); |
6e382aa3 | 3015 | |
8b93c638 | 3016 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
3017 | only be "public", "private", or "protected" |
3018 | ||
3019 | The special "fake" children are always output by varobj in | |
3020 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
3021 | index -= TYPE_N_BASECLASSES (type); |
3022 | switch (index) | |
3023 | { | |
3024 | case 0: | |
6e382aa3 | 3025 | if (children[v_public] > 0) |
2024f65a | 3026 | access = "public"; |
6e382aa3 | 3027 | else if (children[v_private] > 0) |
2024f65a | 3028 | access = "private"; |
6e382aa3 | 3029 | else |
2024f65a | 3030 | access = "protected"; |
6e382aa3 | 3031 | break; |
8b93c638 | 3032 | case 1: |
6e382aa3 | 3033 | if (children[v_public] > 0) |
8b93c638 | 3034 | { |
6e382aa3 | 3035 | if (children[v_private] > 0) |
2024f65a | 3036 | access = "private"; |
6e382aa3 | 3037 | else |
2024f65a | 3038 | access = "protected"; |
8b93c638 | 3039 | } |
6e382aa3 | 3040 | else if (children[v_private] > 0) |
2024f65a | 3041 | access = "protected"; |
6e382aa3 | 3042 | break; |
8b93c638 | 3043 | case 2: |
6e382aa3 | 3044 | /* Must be protected */ |
2024f65a | 3045 | access = "protected"; |
6e382aa3 | 3046 | break; |
8b93c638 JM |
3047 | default: |
3048 | /* error! */ | |
3049 | break; | |
3050 | } | |
348144ba MS |
3051 | |
3052 | gdb_assert (access); | |
2024f65a VP |
3053 | if (cname) |
3054 | *cname = xstrdup (access); | |
8b93c638 | 3055 | |
02142340 | 3056 | /* Value and type and full expression are null here. */ |
2024f65a | 3057 | } |
8b93c638 | 3058 | } |
8b93c638 JM |
3059 | else |
3060 | { | |
02142340 | 3061 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
2024f65a VP |
3062 | } |
3063 | } | |
8b93c638 | 3064 | |
2024f65a VP |
3065 | static char * |
3066 | cplus_name_of_child (struct varobj *parent, int index) | |
3067 | { | |
3068 | char *name = NULL; | |
02142340 | 3069 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
3070 | return name; |
3071 | } | |
3072 | ||
02142340 VP |
3073 | static char * |
3074 | cplus_path_expr_of_child (struct varobj *child) | |
3075 | { | |
3076 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
3077 | &child->path_expr); | |
3078 | return child->path_expr; | |
3079 | } | |
3080 | ||
30b28db1 | 3081 | static struct value * |
fba45db2 | 3082 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 3083 | { |
73a93a32 | 3084 | return c_value_of_root (var_handle); |
8b93c638 JM |
3085 | } |
3086 | ||
30b28db1 | 3087 | static struct value * |
fba45db2 | 3088 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 3089 | { |
2024f65a | 3090 | struct value *value = NULL; |
02142340 | 3091 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
3092 | return value; |
3093 | } | |
3094 | ||
3095 | static struct type * | |
fba45db2 | 3096 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 3097 | { |
2024f65a | 3098 | struct type *type = NULL; |
02142340 | 3099 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
3100 | return type; |
3101 | } | |
3102 | ||
8b93c638 | 3103 | static char * |
de051565 | 3104 | cplus_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 JM |
3105 | { |
3106 | ||
3107 | /* If we have one of our special types, don't print out | |
3108 | any value. */ | |
3109 | if (CPLUS_FAKE_CHILD (var)) | |
3110 | return xstrdup (""); | |
3111 | ||
de051565 | 3112 | return c_value_of_variable (var, format); |
8b93c638 JM |
3113 | } |
3114 | \f | |
3115 | /* Java */ | |
3116 | ||
3117 | static int | |
fba45db2 | 3118 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
3119 | { |
3120 | return cplus_number_of_children (var); | |
3121 | } | |
3122 | ||
3123 | static char * | |
fba45db2 | 3124 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
3125 | { |
3126 | char *p, *name; | |
3127 | ||
3128 | name = cplus_name_of_variable (parent); | |
3129 | /* If the name has "-" in it, it is because we | |
3130 | needed to escape periods in the name... */ | |
3131 | p = name; | |
3132 | ||
3133 | while (*p != '\000') | |
3134 | { | |
3135 | if (*p == '-') | |
3136 | *p = '.'; | |
3137 | p++; | |
3138 | } | |
3139 | ||
3140 | return name; | |
3141 | } | |
3142 | ||
3143 | static char * | |
fba45db2 | 3144 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3145 | { |
3146 | char *name, *p; | |
3147 | ||
3148 | name = cplus_name_of_child (parent, index); | |
3149 | /* Escape any periods in the name... */ | |
3150 | p = name; | |
3151 | ||
3152 | while (*p != '\000') | |
3153 | { | |
3154 | if (*p == '.') | |
3155 | *p = '-'; | |
3156 | p++; | |
3157 | } | |
3158 | ||
3159 | return name; | |
3160 | } | |
3161 | ||
02142340 VP |
3162 | static char * |
3163 | java_path_expr_of_child (struct varobj *child) | |
3164 | { | |
3165 | return NULL; | |
3166 | } | |
3167 | ||
30b28db1 | 3168 | static struct value * |
fba45db2 | 3169 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 3170 | { |
73a93a32 | 3171 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
3172 | } |
3173 | ||
30b28db1 | 3174 | static struct value * |
fba45db2 | 3175 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3176 | { |
3177 | return cplus_value_of_child (parent, index); | |
3178 | } | |
3179 | ||
3180 | static struct type * | |
fba45db2 | 3181 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
3182 | { |
3183 | return cplus_type_of_child (parent, index); | |
3184 | } | |
3185 | ||
8b93c638 | 3186 | static char * |
de051565 | 3187 | java_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
8b93c638 | 3188 | { |
de051565 | 3189 | return cplus_value_of_variable (var, format); |
8b93c638 JM |
3190 | } |
3191 | \f | |
3192 | extern void _initialize_varobj (void); | |
3193 | void | |
3194 | _initialize_varobj (void) | |
3195 | { | |
3196 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
3197 | ||
3198 | varobj_table = xmalloc (sizeof_table); | |
3199 | memset (varobj_table, 0, sizeof_table); | |
3200 | ||
85c07804 AC |
3201 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
3202 | &varobjdebug, _("\ | |
3203 | Set varobj debugging."), _("\ | |
3204 | Show varobj debugging."), _("\ | |
3205 | When non-zero, varobj debugging is enabled."), | |
3206 | NULL, | |
920d2a44 | 3207 | show_varobjdebug, |
85c07804 | 3208 | &setlist, &showlist); |
8b93c638 | 3209 | } |
8756216b DP |
3210 | |
3211 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
3212 | are defined on globals. | |
3213 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2dbd25e5 | 3214 | |
8756216b DP |
3215 | void |
3216 | varobj_invalidate (void) | |
3217 | { | |
3218 | struct varobj **all_rootvarobj; | |
3219 | struct varobj **varp; | |
3220 | ||
3221 | if (varobj_list (&all_rootvarobj) > 0) | |
2dbd25e5 JK |
3222 | { |
3223 | varp = all_rootvarobj; | |
3224 | while (*varp != NULL) | |
3225 | { | |
3226 | /* Floating varobjs are reparsed on each stop, so we don't care if | |
f4a34a08 JK |
3227 | the presently parsed expression refers to something that's gone. |
3228 | */ | |
2dbd25e5 JK |
3229 | if ((*varp)->root->floating) |
3230 | continue; | |
3231 | ||
3232 | /* global var must be re-evaluated. */ | |
3233 | if ((*varp)->root->valid_block == NULL) | |
3234 | { | |
3235 | struct varobj *tmp_var; | |
3236 | ||
f4a34a08 JK |
3237 | /* Try to create a varobj with same expression. If we succeed |
3238 | replace the old varobj, otherwise invalidate it. */ | |
3239 | tmp_var = varobj_create (NULL, (*varp)->name, (CORE_ADDR) 0, | |
3240 | USE_CURRENT_FRAME); | |
2dbd25e5 JK |
3241 | if (tmp_var != NULL) |
3242 | { | |
3243 | tmp_var->obj_name = xstrdup ((*varp)->obj_name); | |
3244 | varobj_delete (*varp, NULL, 0); | |
3245 | install_variable (tmp_var); | |
3246 | } | |
3247 | else | |
3248 | (*varp)->root->is_valid = 0; | |
3249 | } | |
3250 | else /* locals must be invalidated. */ | |
3251 | (*varp)->root->is_valid = 0; | |
3252 | ||
3253 | varp++; | |
3254 | } | |
3255 | } | |
f7545552 | 3256 | xfree (all_rootvarobj); |
8756216b DP |
3257 | return; |
3258 | } |