Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
9b254dd1 | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
1ecb4ee0 | 4 | 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" |
a6c442d8 MK |
28 | |
29 | #include "gdb_assert.h" | |
b66d6d2e | 30 | #include "gdb_string.h" |
8b93c638 JM |
31 | |
32 | #include "varobj.h" | |
28335dcc | 33 | #include "vec.h" |
8b93c638 JM |
34 | |
35 | /* Non-zero if we want to see trace of varobj level stuff. */ | |
36 | ||
37 | int varobjdebug = 0; | |
920d2a44 AC |
38 | static void |
39 | show_varobjdebug (struct ui_file *file, int from_tty, | |
40 | struct cmd_list_element *c, const char *value) | |
41 | { | |
42 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
43 | } | |
8b93c638 JM |
44 | |
45 | /* String representations of gdb's format codes */ | |
46 | char *varobj_format_string[] = | |
72330bd6 | 47 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
48 | |
49 | /* String representations of gdb's known languages */ | |
72330bd6 | 50 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
51 | |
52 | /* Data structures */ | |
53 | ||
54 | /* Every root variable has one of these structures saved in its | |
55 | varobj. Members which must be free'd are noted. */ | |
56 | struct varobj_root | |
72330bd6 | 57 | { |
8b93c638 | 58 | |
72330bd6 AC |
59 | /* Alloc'd expression for this parent. */ |
60 | struct expression *exp; | |
8b93c638 | 61 | |
72330bd6 AC |
62 | /* Block for which this expression is valid */ |
63 | struct block *valid_block; | |
8b93c638 | 64 | |
72330bd6 | 65 | /* The frame for this expression */ |
e64d9b3d | 66 | struct frame_id frame; |
8b93c638 | 67 | |
72330bd6 AC |
68 | /* If 1, "update" always recomputes the frame & valid block |
69 | using the currently selected frame. */ | |
70 | int use_selected_frame; | |
73a93a32 | 71 | |
8756216b DP |
72 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
73 | to symbols that do not exist anymore. */ | |
74 | int is_valid; | |
75 | ||
72330bd6 AC |
76 | /* Language info for this variable and its children */ |
77 | struct language_specific *lang; | |
8b93c638 | 78 | |
72330bd6 AC |
79 | /* The varobj for this root node. */ |
80 | struct varobj *rootvar; | |
8b93c638 | 81 | |
72330bd6 AC |
82 | /* Next root variable */ |
83 | struct varobj_root *next; | |
84 | }; | |
8b93c638 JM |
85 | |
86 | /* Every variable in the system has a structure of this type defined | |
87 | for it. This structure holds all information necessary to manipulate | |
88 | a particular object variable. Members which must be freed are noted. */ | |
89 | struct varobj | |
72330bd6 | 90 | { |
8b93c638 | 91 | |
72330bd6 AC |
92 | /* Alloc'd name of the variable for this object.. If this variable is a |
93 | child, then this name will be the child's source name. | |
94 | (bar, not foo.bar) */ | |
95 | /* NOTE: This is the "expression" */ | |
96 | char *name; | |
8b93c638 | 97 | |
02142340 VP |
98 | /* Alloc'd expression for this child. Can be used to create a |
99 | root variable corresponding to this child. */ | |
100 | char *path_expr; | |
101 | ||
72330bd6 AC |
102 | /* The alloc'd name for this variable's object. This is here for |
103 | convenience when constructing this object's children. */ | |
104 | char *obj_name; | |
8b93c638 | 105 | |
72330bd6 AC |
106 | /* Index of this variable in its parent or -1 */ |
107 | int index; | |
8b93c638 | 108 | |
202ddcaa VP |
109 | /* The type of this variable. This can be NULL |
110 | for artifial variable objects -- currently, the "accessibility" | |
111 | variable objects in C++. */ | |
72330bd6 | 112 | struct type *type; |
8b93c638 | 113 | |
b20d8971 VP |
114 | /* The value of this expression or subexpression. A NULL value |
115 | indicates there was an error getting this value. | |
b2c2bd75 VP |
116 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
117 | the value is either NULL, or not lazy. */ | |
30b28db1 | 118 | struct value *value; |
8b93c638 | 119 | |
72330bd6 AC |
120 | /* The number of (immediate) children this variable has */ |
121 | int num_children; | |
8b93c638 | 122 | |
72330bd6 AC |
123 | /* If this object is a child, this points to its immediate parent. */ |
124 | struct varobj *parent; | |
8b93c638 | 125 | |
28335dcc VP |
126 | /* Children of this object. */ |
127 | VEC (varobj_p) *children; | |
8b93c638 | 128 | |
72330bd6 AC |
129 | /* Description of the root variable. Points to root variable for children. */ |
130 | struct varobj_root *root; | |
8b93c638 | 131 | |
72330bd6 AC |
132 | /* The format of the output for this object */ |
133 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
134 | |
135 | /* Was this variable updated via a varobj_set_value operation */ | |
136 | int updated; | |
85265413 NR |
137 | |
138 | /* Last print value. */ | |
139 | char *print_value; | |
25d5ea92 VP |
140 | |
141 | /* Is this variable frozen. Frozen variables are never implicitly | |
142 | updated by -var-update * | |
143 | or -var-update <direct-or-indirect-parent>. */ | |
144 | int frozen; | |
145 | ||
146 | /* Is the value of this variable intentionally not fetched? It is | |
147 | not fetched if either the variable is frozen, or any parents is | |
148 | frozen. */ | |
149 | int not_fetched; | |
72330bd6 | 150 | }; |
8b93c638 | 151 | |
8b93c638 | 152 | struct cpstack |
72330bd6 AC |
153 | { |
154 | char *name; | |
155 | struct cpstack *next; | |
156 | }; | |
8b93c638 JM |
157 | |
158 | /* A list of varobjs */ | |
159 | ||
160 | struct vlist | |
72330bd6 AC |
161 | { |
162 | struct varobj *var; | |
163 | struct vlist *next; | |
164 | }; | |
8b93c638 JM |
165 | |
166 | /* Private function prototypes */ | |
167 | ||
168 | /* Helper functions for the above subcommands. */ | |
169 | ||
a14ed312 | 170 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 171 | |
a14ed312 KB |
172 | static void delete_variable_1 (struct cpstack **, int *, |
173 | struct varobj *, int, int); | |
8b93c638 | 174 | |
a14ed312 | 175 | static int install_variable (struct varobj *); |
8b93c638 | 176 | |
a14ed312 | 177 | static void uninstall_variable (struct varobj *); |
8b93c638 | 178 | |
a14ed312 | 179 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 180 | |
8b93c638 JM |
181 | /* Utility routines */ |
182 | ||
a14ed312 | 183 | static struct varobj *new_variable (void); |
8b93c638 | 184 | |
a14ed312 | 185 | static struct varobj *new_root_variable (void); |
8b93c638 | 186 | |
a14ed312 | 187 | static void free_variable (struct varobj *var); |
8b93c638 | 188 | |
74b7792f AC |
189 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
190 | ||
a14ed312 | 191 | static struct type *get_type (struct varobj *var); |
8b93c638 | 192 | |
6e2a9270 VP |
193 | static struct type *get_value_type (struct varobj *var); |
194 | ||
a14ed312 | 195 | static struct type *get_target_type (struct type *); |
8b93c638 | 196 | |
a14ed312 | 197 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 198 | |
a14ed312 | 199 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 200 | |
a14ed312 | 201 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 202 | |
acd65feb VP |
203 | static int install_new_value (struct varobj *var, struct value *value, |
204 | int initial); | |
205 | ||
8b93c638 JM |
206 | /* Language-specific routines. */ |
207 | ||
a14ed312 | 208 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 209 | |
a14ed312 | 210 | static int number_of_children (struct varobj *); |
8b93c638 | 211 | |
a14ed312 | 212 | static char *name_of_variable (struct varobj *); |
8b93c638 | 213 | |
a14ed312 | 214 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 215 | |
30b28db1 | 216 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 217 | |
30b28db1 | 218 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 219 | |
a14ed312 | 220 | static char *my_value_of_variable (struct varobj *var); |
8b93c638 | 221 | |
85265413 NR |
222 | static char *value_get_print_value (struct value *value, |
223 | enum varobj_display_formats format); | |
224 | ||
b2c2bd75 VP |
225 | static int varobj_value_is_changeable_p (struct varobj *var); |
226 | ||
227 | static int is_root_p (struct varobj *var); | |
8b93c638 JM |
228 | |
229 | /* C implementation */ | |
230 | ||
a14ed312 | 231 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 232 | |
a14ed312 | 233 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 234 | |
a14ed312 | 235 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 236 | |
02142340 VP |
237 | static char *c_path_expr_of_child (struct varobj *child); |
238 | ||
30b28db1 | 239 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 240 | |
30b28db1 | 241 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 242 | |
a14ed312 | 243 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 244 | |
a14ed312 | 245 | static char *c_value_of_variable (struct varobj *var); |
8b93c638 JM |
246 | |
247 | /* C++ implementation */ | |
248 | ||
a14ed312 | 249 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 250 | |
a14ed312 | 251 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 252 | |
a14ed312 | 253 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 254 | |
a14ed312 | 255 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 256 | |
02142340 VP |
257 | static char *cplus_path_expr_of_child (struct varobj *child); |
258 | ||
30b28db1 | 259 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 260 | |
30b28db1 | 261 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 262 | |
a14ed312 | 263 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 264 | |
a14ed312 | 265 | static char *cplus_value_of_variable (struct varobj *var); |
8b93c638 JM |
266 | |
267 | /* Java implementation */ | |
268 | ||
a14ed312 | 269 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 270 | |
a14ed312 | 271 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 272 | |
a14ed312 | 273 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 274 | |
02142340 VP |
275 | static char *java_path_expr_of_child (struct varobj *child); |
276 | ||
30b28db1 | 277 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 278 | |
30b28db1 | 279 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 280 | |
a14ed312 | 281 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 282 | |
a14ed312 | 283 | static char *java_value_of_variable (struct varobj *var); |
8b93c638 JM |
284 | |
285 | /* The language specific vector */ | |
286 | ||
287 | struct language_specific | |
72330bd6 | 288 | { |
8b93c638 | 289 | |
72330bd6 AC |
290 | /* The language of this variable */ |
291 | enum varobj_languages language; | |
8b93c638 | 292 | |
72330bd6 AC |
293 | /* The number of children of PARENT. */ |
294 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 295 | |
72330bd6 AC |
296 | /* The name (expression) of a root varobj. */ |
297 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 298 | |
72330bd6 AC |
299 | /* The name of the INDEX'th child of PARENT. */ |
300 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 301 | |
02142340 VP |
302 | /* Returns the rooted expression of CHILD, which is a variable |
303 | obtain that has some parent. */ | |
304 | char *(*path_expr_of_child) (struct varobj * child); | |
305 | ||
30b28db1 AC |
306 | /* The ``struct value *'' of the root variable ROOT. */ |
307 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 308 | |
30b28db1 AC |
309 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
310 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 311 | |
72330bd6 AC |
312 | /* The type of the INDEX'th child of PARENT. */ |
313 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 314 | |
72330bd6 AC |
315 | /* The current value of VAR. */ |
316 | char *(*value_of_variable) (struct varobj * var); | |
317 | }; | |
8b93c638 JM |
318 | |
319 | /* Array of known source language routines. */ | |
d5d6fca5 | 320 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
321 | /* Unknown (try treating as C */ |
322 | { | |
72330bd6 AC |
323 | vlang_unknown, |
324 | c_number_of_children, | |
325 | c_name_of_variable, | |
326 | c_name_of_child, | |
02142340 | 327 | c_path_expr_of_child, |
72330bd6 AC |
328 | c_value_of_root, |
329 | c_value_of_child, | |
330 | c_type_of_child, | |
72330bd6 | 331 | c_value_of_variable} |
8b93c638 JM |
332 | , |
333 | /* C */ | |
334 | { | |
72330bd6 AC |
335 | vlang_c, |
336 | c_number_of_children, | |
337 | c_name_of_variable, | |
338 | c_name_of_child, | |
02142340 | 339 | c_path_expr_of_child, |
72330bd6 AC |
340 | c_value_of_root, |
341 | c_value_of_child, | |
342 | c_type_of_child, | |
72330bd6 | 343 | c_value_of_variable} |
8b93c638 JM |
344 | , |
345 | /* C++ */ | |
346 | { | |
72330bd6 AC |
347 | vlang_cplus, |
348 | cplus_number_of_children, | |
349 | cplus_name_of_variable, | |
350 | cplus_name_of_child, | |
02142340 | 351 | cplus_path_expr_of_child, |
72330bd6 AC |
352 | cplus_value_of_root, |
353 | cplus_value_of_child, | |
354 | cplus_type_of_child, | |
72330bd6 | 355 | cplus_value_of_variable} |
8b93c638 JM |
356 | , |
357 | /* Java */ | |
358 | { | |
72330bd6 AC |
359 | vlang_java, |
360 | java_number_of_children, | |
361 | java_name_of_variable, | |
362 | java_name_of_child, | |
02142340 | 363 | java_path_expr_of_child, |
72330bd6 AC |
364 | java_value_of_root, |
365 | java_value_of_child, | |
366 | java_type_of_child, | |
72330bd6 | 367 | java_value_of_variable} |
8b93c638 JM |
368 | }; |
369 | ||
370 | /* A little convenience enum for dealing with C++/Java */ | |
371 | enum vsections | |
72330bd6 AC |
372 | { |
373 | v_public = 0, v_private, v_protected | |
374 | }; | |
8b93c638 JM |
375 | |
376 | /* Private data */ | |
377 | ||
378 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 379 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
380 | |
381 | /* Header of the list of root variable objects */ | |
382 | static struct varobj_root *rootlist; | |
383 | static int rootcount = 0; /* number of root varobjs in the list */ | |
384 | ||
385 | /* Prime number indicating the number of buckets in the hash table */ | |
386 | /* A prime large enough to avoid too many colisions */ | |
387 | #define VAROBJ_TABLE_SIZE 227 | |
388 | ||
389 | /* Pointer to the varobj hash table (built at run time) */ | |
390 | static struct vlist **varobj_table; | |
391 | ||
8b93c638 JM |
392 | /* Is the variable X one of our "fake" children? */ |
393 | #define CPLUS_FAKE_CHILD(x) \ | |
394 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
395 | \f | |
396 | ||
397 | /* API Implementation */ | |
b2c2bd75 VP |
398 | static int |
399 | is_root_p (struct varobj *var) | |
400 | { | |
401 | return (var->root->rootvar == var); | |
402 | } | |
8b93c638 JM |
403 | |
404 | /* Creates a varobj (not its children) */ | |
405 | ||
7d8547c9 AC |
406 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
407 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
408 | ||
409 | static struct frame_info * | |
410 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
411 | { | |
412 | struct frame_info *frame = NULL; | |
413 | ||
414 | if (frame_addr == (CORE_ADDR) 0) | |
415 | return NULL; | |
416 | ||
417 | while (1) | |
418 | { | |
419 | frame = get_prev_frame (frame); | |
420 | if (frame == NULL) | |
421 | return NULL; | |
eb5492fa | 422 | if (get_frame_base_address (frame) == frame_addr) |
7d8547c9 AC |
423 | return frame; |
424 | } | |
425 | } | |
426 | ||
8b93c638 JM |
427 | struct varobj * |
428 | varobj_create (char *objname, | |
72330bd6 | 429 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
430 | { |
431 | struct varobj *var; | |
2c67cb8b AC |
432 | struct frame_info *fi; |
433 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
434 | struct block *block; |
435 | struct cleanup *old_chain; | |
436 | ||
437 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
438 | var = new_root_variable (); | |
74b7792f | 439 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
440 | |
441 | if (expression != NULL) | |
442 | { | |
443 | char *p; | |
444 | enum varobj_languages lang; | |
e55dccf0 | 445 | struct value *value = NULL; |
02142340 | 446 | int expr_len; |
8b93c638 JM |
447 | |
448 | /* Parse and evaluate the expression, filling in as much | |
449 | of the variable's data as possible */ | |
450 | ||
451 | /* Allow creator to specify context of variable */ | |
72330bd6 | 452 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
206415a3 | 453 | fi = deprecated_safe_get_selected_frame (); |
8b93c638 | 454 | else |
7d8547c9 AC |
455 | /* FIXME: cagney/2002-11-23: This code should be doing a |
456 | lookup using the frame ID and not just the frame's | |
457 | ``address''. This, of course, means an interface change. | |
458 | However, with out that interface change ISAs, such as the | |
459 | ia64 with its two stacks, won't work. Similar goes for the | |
460 | case where there is a frameless function. */ | |
8b93c638 JM |
461 | fi = find_frame_addr_in_frame_chain (frame); |
462 | ||
73a93a32 JI |
463 | /* frame = -2 means always use selected frame */ |
464 | if (type == USE_SELECTED_FRAME) | |
465 | var->root->use_selected_frame = 1; | |
466 | ||
8b93c638 JM |
467 | block = NULL; |
468 | if (fi != NULL) | |
ae767bfb | 469 | block = get_frame_block (fi, 0); |
8b93c638 JM |
470 | |
471 | p = expression; | |
472 | innermost_block = NULL; | |
73a93a32 JI |
473 | /* Wrap the call to parse expression, so we can |
474 | return a sensible error. */ | |
475 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
476 | { | |
477 | return NULL; | |
478 | } | |
8b93c638 JM |
479 | |
480 | /* Don't allow variables to be created for types. */ | |
481 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
482 | { | |
483 | do_cleanups (old_chain); | |
bc8332bb AC |
484 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
485 | " as an expression.\n"); | |
8b93c638 JM |
486 | return NULL; |
487 | } | |
488 | ||
489 | var->format = variable_default_display (var); | |
490 | var->root->valid_block = innermost_block; | |
02142340 VP |
491 | expr_len = strlen (expression); |
492 | var->name = savestring (expression, expr_len); | |
493 | /* For a root var, the name and the expr are the same. */ | |
494 | var->path_expr = savestring (expression, expr_len); | |
8b93c638 JM |
495 | |
496 | /* When the frame is different from the current frame, | |
497 | we must select the appropriate frame before parsing | |
498 | the expression, otherwise the value will not be current. | |
499 | Since select_frame is so benign, just call it for all cases. */ | |
500 | if (fi != NULL) | |
501 | { | |
7a424e99 | 502 | var->root->frame = get_frame_id (fi); |
206415a3 | 503 | old_fi = get_selected_frame (NULL); |
0f7d239c | 504 | select_frame (fi); |
8b93c638 JM |
505 | } |
506 | ||
340a7723 | 507 | /* We definitely need to catch errors here. |
8b93c638 JM |
508 | If evaluate_expression succeeds we got the value we wanted. |
509 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb | 510 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
e55dccf0 VP |
511 | { |
512 | /* Error getting the value. Try to at least get the | |
513 | right type. */ | |
514 | struct value *type_only_value = evaluate_type (var->root->exp); | |
515 | var->type = value_type (type_only_value); | |
516 | } | |
517 | else | |
518 | var->type = value_type (value); | |
acd65feb | 519 | |
acd65feb | 520 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
521 | |
522 | /* Set language info */ | |
523 | lang = variable_language (var); | |
d5d6fca5 | 524 | var->root->lang = &languages[lang]; |
8b93c638 JM |
525 | |
526 | /* Set ourselves as our root */ | |
527 | var->root->rootvar = var; | |
528 | ||
529 | /* Reset the selected frame */ | |
530 | if (fi != NULL) | |
0f7d239c | 531 | select_frame (old_fi); |
8b93c638 JM |
532 | } |
533 | ||
73a93a32 JI |
534 | /* If the variable object name is null, that means this |
535 | is a temporary variable, so don't install it. */ | |
536 | ||
537 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 JM |
538 | { |
539 | var->obj_name = savestring (objname, strlen (objname)); | |
540 | ||
541 | /* If a varobj name is duplicated, the install will fail so | |
542 | we must clenup */ | |
543 | if (!install_variable (var)) | |
544 | { | |
545 | do_cleanups (old_chain); | |
546 | return NULL; | |
547 | } | |
548 | } | |
549 | ||
550 | discard_cleanups (old_chain); | |
551 | return var; | |
552 | } | |
553 | ||
554 | /* Generates an unique name that can be used for a varobj */ | |
555 | ||
556 | char * | |
557 | varobj_gen_name (void) | |
558 | { | |
559 | static int id = 0; | |
e64d9b3d | 560 | char *obj_name; |
8b93c638 JM |
561 | |
562 | /* generate a name for this object */ | |
563 | id++; | |
b435e160 | 564 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 565 | |
e64d9b3d | 566 | return obj_name; |
8b93c638 JM |
567 | } |
568 | ||
569 | /* Given an "objname", returns the pointer to the corresponding varobj | |
570 | or NULL if not found */ | |
571 | ||
572 | struct varobj * | |
573 | varobj_get_handle (char *objname) | |
574 | { | |
575 | struct vlist *cv; | |
576 | const char *chp; | |
577 | unsigned int index = 0; | |
578 | unsigned int i = 1; | |
579 | ||
580 | for (chp = objname; *chp; chp++) | |
581 | { | |
582 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
583 | } | |
584 | ||
585 | cv = *(varobj_table + index); | |
586 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
587 | cv = cv->next; | |
588 | ||
589 | if (cv == NULL) | |
8a3fe4f8 | 590 | error (_("Variable object not found")); |
8b93c638 JM |
591 | |
592 | return cv->var; | |
593 | } | |
594 | ||
595 | /* Given the handle, return the name of the object */ | |
596 | ||
597 | char * | |
598 | varobj_get_objname (struct varobj *var) | |
599 | { | |
600 | return var->obj_name; | |
601 | } | |
602 | ||
603 | /* Given the handle, return the expression represented by the object */ | |
604 | ||
605 | char * | |
606 | varobj_get_expression (struct varobj *var) | |
607 | { | |
608 | return name_of_variable (var); | |
609 | } | |
610 | ||
611 | /* Deletes a varobj and all its children if only_children == 0, | |
612 | otherwise deletes only the children; returns a malloc'ed list of all the | |
613 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
614 | ||
615 | int | |
616 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
617 | { | |
618 | int delcount; | |
619 | int mycount; | |
620 | struct cpstack *result = NULL; | |
621 | char **cp; | |
622 | ||
623 | /* Initialize a stack for temporary results */ | |
624 | cppush (&result, NULL); | |
625 | ||
626 | if (only_children) | |
627 | /* Delete only the variable children */ | |
628 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
629 | else | |
630 | /* Delete the variable and all its children */ | |
631 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
632 | ||
633 | /* We may have been asked to return a list of what has been deleted */ | |
634 | if (dellist != NULL) | |
635 | { | |
636 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
637 | ||
638 | cp = *dellist; | |
639 | mycount = delcount; | |
640 | *cp = cppop (&result); | |
641 | while ((*cp != NULL) && (mycount > 0)) | |
642 | { | |
643 | mycount--; | |
644 | cp++; | |
645 | *cp = cppop (&result); | |
646 | } | |
647 | ||
648 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 649 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 650 | mycount); |
8b93c638 JM |
651 | } |
652 | ||
653 | return delcount; | |
654 | } | |
655 | ||
656 | /* Set/Get variable object display format */ | |
657 | ||
658 | enum varobj_display_formats | |
659 | varobj_set_display_format (struct varobj *var, | |
660 | enum varobj_display_formats format) | |
661 | { | |
662 | switch (format) | |
663 | { | |
664 | case FORMAT_NATURAL: | |
665 | case FORMAT_BINARY: | |
666 | case FORMAT_DECIMAL: | |
667 | case FORMAT_HEXADECIMAL: | |
668 | case FORMAT_OCTAL: | |
669 | var->format = format; | |
670 | break; | |
671 | ||
672 | default: | |
673 | var->format = variable_default_display (var); | |
674 | } | |
675 | ||
676 | return var->format; | |
677 | } | |
678 | ||
679 | enum varobj_display_formats | |
680 | varobj_get_display_format (struct varobj *var) | |
681 | { | |
682 | return var->format; | |
683 | } | |
684 | ||
25d5ea92 VP |
685 | void |
686 | varobj_set_frozen (struct varobj *var, int frozen) | |
687 | { | |
688 | /* When a variable is unfrozen, we don't fetch its value. | |
689 | The 'not_fetched' flag remains set, so next -var-update | |
690 | won't complain. | |
691 | ||
692 | We don't fetch the value, because for structures the client | |
693 | should do -var-update anyway. It would be bad to have different | |
694 | client-size logic for structure and other types. */ | |
695 | var->frozen = frozen; | |
696 | } | |
697 | ||
698 | int | |
699 | varobj_get_frozen (struct varobj *var) | |
700 | { | |
701 | return var->frozen; | |
702 | } | |
703 | ||
704 | ||
8b93c638 JM |
705 | int |
706 | varobj_get_num_children (struct varobj *var) | |
707 | { | |
708 | if (var->num_children == -1) | |
709 | var->num_children = number_of_children (var); | |
710 | ||
711 | return var->num_children; | |
712 | } | |
713 | ||
714 | /* Creates a list of the immediate children of a variable object; | |
715 | the return code is the number of such children or -1 on error */ | |
716 | ||
d56d46f5 VP |
717 | VEC (varobj_p)* |
718 | varobj_list_children (struct varobj *var) | |
8b93c638 JM |
719 | { |
720 | struct varobj *child; | |
721 | char *name; | |
722 | int i; | |
723 | ||
8b93c638 JM |
724 | if (var->num_children == -1) |
725 | var->num_children = number_of_children (var); | |
726 | ||
74a44383 DJ |
727 | /* If that failed, give up. */ |
728 | if (var->num_children == -1) | |
d56d46f5 | 729 | return var->children; |
74a44383 | 730 | |
28335dcc VP |
731 | /* If we're called when the list of children is not yet initialized, |
732 | allocate enough elements in it. */ | |
733 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
734 | VEC_safe_push (varobj_p, var->children, NULL); | |
735 | ||
8b93c638 JM |
736 | for (i = 0; i < var->num_children; i++) |
737 | { | |
d56d46f5 | 738 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
739 | |
740 | if (existing == NULL) | |
741 | { | |
742 | /* Either it's the first call to varobj_list_children for | |
743 | this variable object, and the child was never created, | |
744 | or it was explicitly deleted by the client. */ | |
745 | name = name_of_child (var, i); | |
746 | existing = create_child (var, i, name); | |
747 | VEC_replace (varobj_p, var->children, i, existing); | |
748 | } | |
8b93c638 JM |
749 | } |
750 | ||
d56d46f5 | 751 | return var->children; |
8b93c638 JM |
752 | } |
753 | ||
754 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
755 | prints on the console */ | |
756 | ||
757 | char * | |
758 | varobj_get_type (struct varobj *var) | |
759 | { | |
30b28db1 | 760 | struct value *val; |
8b93c638 JM |
761 | struct cleanup *old_chain; |
762 | struct ui_file *stb; | |
763 | char *thetype; | |
764 | long length; | |
765 | ||
766 | /* For the "fake" variables, do not return a type. (It's type is | |
8756216b DP |
767 | NULL, too.) |
768 | Do not return a type for invalid variables as well. */ | |
769 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
770 | return NULL; |
771 | ||
772 | stb = mem_fileopen (); | |
773 | old_chain = make_cleanup_ui_file_delete (stb); | |
774 | ||
30b28db1 | 775 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
776 | cast it to our type. We then typeprint this variable. */ |
777 | val = value_zero (var->type, not_lval); | |
df407dfe | 778 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
779 | |
780 | thetype = ui_file_xstrdup (stb, &length); | |
781 | do_cleanups (old_chain); | |
782 | return thetype; | |
783 | } | |
784 | ||
1ecb4ee0 DJ |
785 | /* Obtain the type of an object variable. */ |
786 | ||
787 | struct type * | |
788 | varobj_get_gdb_type (struct varobj *var) | |
789 | { | |
790 | return var->type; | |
791 | } | |
792 | ||
02142340 VP |
793 | /* Return a pointer to the full rooted expression of varobj VAR. |
794 | If it has not been computed yet, compute it. */ | |
795 | char * | |
796 | varobj_get_path_expr (struct varobj *var) | |
797 | { | |
798 | if (var->path_expr != NULL) | |
799 | return var->path_expr; | |
800 | else | |
801 | { | |
802 | /* For root varobjs, we initialize path_expr | |
803 | when creating varobj, so here it should be | |
804 | child varobj. */ | |
805 | gdb_assert (!is_root_p (var)); | |
806 | return (*var->root->lang->path_expr_of_child) (var); | |
807 | } | |
808 | } | |
809 | ||
8b93c638 JM |
810 | enum varobj_languages |
811 | varobj_get_language (struct varobj *var) | |
812 | { | |
813 | return variable_language (var); | |
814 | } | |
815 | ||
816 | int | |
817 | varobj_get_attributes (struct varobj *var) | |
818 | { | |
819 | int attributes = 0; | |
820 | ||
340a7723 | 821 | if (varobj_editable_p (var)) |
8b93c638 JM |
822 | /* FIXME: define masks for attributes */ |
823 | attributes |= 0x00000001; /* Editable */ | |
824 | ||
825 | return attributes; | |
826 | } | |
827 | ||
828 | char * | |
829 | varobj_get_value (struct varobj *var) | |
830 | { | |
831 | return my_value_of_variable (var); | |
832 | } | |
833 | ||
834 | /* Set the value of an object variable (if it is editable) to the | |
835 | value of the given expression */ | |
836 | /* Note: Invokes functions that can call error() */ | |
837 | ||
838 | int | |
839 | varobj_set_value (struct varobj *var, char *expression) | |
840 | { | |
30b28db1 | 841 | struct value *val; |
8b93c638 | 842 | int offset = 0; |
a6c442d8 | 843 | int error = 0; |
8b93c638 JM |
844 | |
845 | /* The argument "expression" contains the variable's new value. | |
846 | We need to first construct a legal expression for this -- ugh! */ | |
847 | /* Does this cover all the bases? */ | |
848 | struct expression *exp; | |
30b28db1 | 849 | struct value *value; |
8b93c638 | 850 | int saved_input_radix = input_radix; |
340a7723 NR |
851 | char *s = expression; |
852 | int i; | |
8b93c638 | 853 | |
340a7723 | 854 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 855 | |
340a7723 NR |
856 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ |
857 | exp = parse_exp_1 (&s, 0, 0); | |
858 | if (!gdb_evaluate_expression (exp, &value)) | |
859 | { | |
860 | /* We cannot proceed without a valid expression. */ | |
861 | xfree (exp); | |
862 | return 0; | |
8b93c638 JM |
863 | } |
864 | ||
340a7723 NR |
865 | /* All types that are editable must also be changeable. */ |
866 | gdb_assert (varobj_value_is_changeable_p (var)); | |
867 | ||
868 | /* The value of a changeable variable object must not be lazy. */ | |
869 | gdb_assert (!value_lazy (var->value)); | |
870 | ||
871 | /* Need to coerce the input. We want to check if the | |
872 | value of the variable object will be different | |
873 | after assignment, and the first thing value_assign | |
874 | does is coerce the input. | |
875 | For example, if we are assigning an array to a pointer variable we | |
876 | should compare the pointer with the the array's address, not with the | |
877 | array's content. */ | |
878 | value = coerce_array (value); | |
879 | ||
880 | /* The new value may be lazy. gdb_value_assign, or | |
881 | rather value_contents, will take care of this. | |
882 | If fetching of the new value will fail, gdb_value_assign | |
883 | with catch the exception. */ | |
884 | if (!gdb_value_assign (var->value, value, &val)) | |
885 | return 0; | |
886 | ||
887 | /* If the value has changed, record it, so that next -var-update can | |
888 | report this change. If a variable had a value of '1', we've set it | |
889 | to '333' and then set again to '1', when -var-update will report this | |
890 | variable as changed -- because the first assignment has set the | |
891 | 'updated' flag. There's no need to optimize that, because return value | |
892 | of -var-update should be considered an approximation. */ | |
893 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
894 | input_radix = saved_input_radix; | |
895 | return 1; | |
8b93c638 JM |
896 | } |
897 | ||
898 | /* Returns a malloc'ed list with all root variable objects */ | |
899 | int | |
900 | varobj_list (struct varobj ***varlist) | |
901 | { | |
902 | struct varobj **cv; | |
903 | struct varobj_root *croot; | |
904 | int mycount = rootcount; | |
905 | ||
906 | /* Alloc (rootcount + 1) entries for the result */ | |
907 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
908 | ||
909 | cv = *varlist; | |
910 | croot = rootlist; | |
911 | while ((croot != NULL) && (mycount > 0)) | |
912 | { | |
913 | *cv = croot->rootvar; | |
914 | mycount--; | |
915 | cv++; | |
916 | croot = croot->next; | |
917 | } | |
918 | /* Mark the end of the list */ | |
919 | *cv = NULL; | |
920 | ||
921 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
922 | warning |
923 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
924 | rootcount, mycount); | |
8b93c638 JM |
925 | |
926 | return rootcount; | |
927 | } | |
928 | ||
acd65feb VP |
929 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
930 | this is the first assignement after the variable object was just | |
931 | created, or changed type. In that case, just assign the value | |
932 | and return 0. | |
933 | Otherwise, assign the value and if type_changeable returns non-zero, | |
934 | find if the new value is different from the current value. | |
b26ed50d VP |
935 | Return 1 if so, and 0 if the values are equal. |
936 | ||
937 | The VALUE parameter should not be released -- the function will | |
938 | take care of releasing it when needed. */ | |
acd65feb VP |
939 | static int |
940 | install_new_value (struct varobj *var, struct value *value, int initial) | |
941 | { | |
942 | int changeable; | |
943 | int need_to_fetch; | |
944 | int changed = 0; | |
25d5ea92 | 945 | int intentionally_not_fetched = 0; |
7a4d50bf | 946 | char *print_value = NULL; |
acd65feb | 947 | |
acd65feb VP |
948 | /* We need to know the varobj's type to decide if the value should |
949 | be fetched or not. C++ fake children (public/protected/private) don't have | |
950 | a type. */ | |
951 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 952 | changeable = varobj_value_is_changeable_p (var); |
acd65feb VP |
953 | need_to_fetch = changeable; |
954 | ||
b26ed50d VP |
955 | /* We are not interested in the address of references, and given |
956 | that in C++ a reference is not rebindable, it cannot | |
957 | meaningfully change. So, get hold of the real value. */ | |
958 | if (value) | |
959 | { | |
960 | value = coerce_ref (value); | |
961 | release_value (value); | |
962 | } | |
963 | ||
acd65feb VP |
964 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
965 | /* For unions, we need to fetch the value implicitly because | |
966 | of implementation of union member fetch. When gdb | |
967 | creates a value for a field and the value of the enclosing | |
968 | structure is not lazy, it immediately copies the necessary | |
969 | bytes from the enclosing values. If the enclosing value is | |
970 | lazy, the call to value_fetch_lazy on the field will read | |
971 | the data from memory. For unions, that means we'll read the | |
972 | same memory more than once, which is not desirable. So | |
973 | fetch now. */ | |
974 | need_to_fetch = 1; | |
975 | ||
976 | /* The new value might be lazy. If the type is changeable, | |
977 | that is we'll be comparing values of this type, fetch the | |
978 | value now. Otherwise, on the next update the old value | |
979 | will be lazy, which means we've lost that old value. */ | |
980 | if (need_to_fetch && value && value_lazy (value)) | |
981 | { | |
25d5ea92 VP |
982 | struct varobj *parent = var->parent; |
983 | int frozen = var->frozen; | |
984 | for (; !frozen && parent; parent = parent->parent) | |
985 | frozen |= parent->frozen; | |
986 | ||
987 | if (frozen && initial) | |
988 | { | |
989 | /* For variables that are frozen, or are children of frozen | |
990 | variables, we don't do fetch on initial assignment. | |
991 | For non-initial assignemnt we do the fetch, since it means we're | |
992 | explicitly asked to compare the new value with the old one. */ | |
993 | intentionally_not_fetched = 1; | |
994 | } | |
995 | else if (!gdb_value_fetch_lazy (value)) | |
acd65feb | 996 | { |
acd65feb VP |
997 | /* Set the value to NULL, so that for the next -var-update, |
998 | we don't try to compare the new value with this value, | |
999 | that we couldn't even read. */ | |
1000 | value = NULL; | |
1001 | } | |
acd65feb VP |
1002 | } |
1003 | ||
7a4d50bf VP |
1004 | /* Below, we'll be comparing string rendering of old and new |
1005 | values. Don't get string rendering if the value is | |
1006 | lazy -- if it is, the code above has decided that the value | |
1007 | should not be fetched. */ | |
1008 | if (value && !value_lazy (value)) | |
1009 | print_value = value_get_print_value (value, var->format); | |
1010 | ||
acd65feb VP |
1011 | /* If the type is changeable, compare the old and the new values. |
1012 | If this is the initial assignment, we don't have any old value | |
1013 | to compare with. */ | |
7a4d50bf | 1014 | if (!initial && changeable) |
acd65feb VP |
1015 | { |
1016 | /* If the value of the varobj was changed by -var-set-value, then the | |
1017 | value in the varobj and in the target is the same. However, that value | |
1018 | is different from the value that the varobj had after the previous | |
57e66780 | 1019 | -var-update. So need to the varobj as changed. */ |
acd65feb | 1020 | if (var->updated) |
57e66780 | 1021 | { |
57e66780 DJ |
1022 | changed = 1; |
1023 | } | |
acd65feb VP |
1024 | else |
1025 | { | |
1026 | /* Try to compare the values. That requires that both | |
1027 | values are non-lazy. */ | |
25d5ea92 VP |
1028 | if (var->not_fetched && value_lazy (var->value)) |
1029 | { | |
1030 | /* This is a frozen varobj and the value was never read. | |
1031 | Presumably, UI shows some "never read" indicator. | |
1032 | Now that we've fetched the real value, we need to report | |
1033 | this varobj as changed so that UI can show the real | |
1034 | value. */ | |
1035 | changed = 1; | |
1036 | } | |
1037 | else if (var->value == NULL && value == NULL) | |
acd65feb VP |
1038 | /* Equal. */ |
1039 | ; | |
1040 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1041 | { |
57e66780 DJ |
1042 | changed = 1; |
1043 | } | |
acd65feb VP |
1044 | else |
1045 | { | |
1046 | gdb_assert (!value_lazy (var->value)); | |
1047 | gdb_assert (!value_lazy (value)); | |
85265413 | 1048 | |
57e66780 | 1049 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1050 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1051 | changed = 1; |
acd65feb VP |
1052 | } |
1053 | } | |
1054 | } | |
85265413 | 1055 | |
acd65feb | 1056 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1057 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1058 | value_free (var->value); |
1059 | var->value = value; | |
7a4d50bf VP |
1060 | if (var->print_value) |
1061 | xfree (var->print_value); | |
1062 | var->print_value = print_value; | |
25d5ea92 VP |
1063 | if (value && value_lazy (value) && intentionally_not_fetched) |
1064 | var->not_fetched = 1; | |
1065 | else | |
1066 | var->not_fetched = 0; | |
acd65feb | 1067 | var->updated = 0; |
85265413 | 1068 | |
b26ed50d | 1069 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1070 | |
1071 | return changed; | |
1072 | } | |
acd65feb | 1073 | |
8b93c638 JM |
1074 | /* Update the values for a variable and its children. This is a |
1075 | two-pronged attack. First, re-parse the value for the root's | |
1076 | expression to see if it's changed. Then go all the way | |
1077 | through its children, reconstructing them and noting if they've | |
1078 | changed. | |
8756216b DP |
1079 | Return value: |
1080 | < 0 for error values, see varobj.h. | |
1081 | Otherwise it is the number of children + parent changed. | |
8b93c638 | 1082 | |
25d5ea92 VP |
1083 | The EXPLICIT parameter specifies if this call is result |
1084 | of MI request to update this specific variable, or | |
1085 | result of implicit -var-update *. For implicit request, we don't | |
1086 | update frozen variables. | |
705da579 KS |
1087 | |
1088 | NOTE: This function may delete the caller's varobj. If it | |
8756216b DP |
1089 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1090 | to point to the new varobj. */ | |
8b93c638 JM |
1091 | |
1092 | int | |
25d5ea92 VP |
1093 | varobj_update (struct varobj **varp, struct varobj ***changelist, |
1094 | int explicit) | |
8b93c638 JM |
1095 | { |
1096 | int changed = 0; | |
25d5ea92 | 1097 | int type_changed = 0; |
8b93c638 JM |
1098 | int i; |
1099 | int vleft; | |
8b93c638 JM |
1100 | struct varobj *v; |
1101 | struct varobj **cv; | |
2c67cb8b | 1102 | struct varobj **templist = NULL; |
30b28db1 | 1103 | struct value *new; |
28335dcc VP |
1104 | VEC (varobj_p) *stack = NULL; |
1105 | VEC (varobj_p) *result = NULL; | |
e64d9b3d MH |
1106 | struct frame_id old_fid; |
1107 | struct frame_info *fi; | |
8b93c638 | 1108 | |
8756216b | 1109 | /* sanity check: have we been passed a pointer? */ |
a1f42e84 | 1110 | gdb_assert (changelist); |
8b93c638 | 1111 | |
25d5ea92 VP |
1112 | /* Frozen means frozen -- we don't check for any change in |
1113 | this varobj, including its going out of scope, or | |
1114 | changing type. One use case for frozen varobjs is | |
1115 | retaining previously evaluated expressions, and we don't | |
1116 | want them to be reevaluated at all. */ | |
1117 | if (!explicit && (*varp)->frozen) | |
1118 | return 0; | |
8756216b DP |
1119 | |
1120 | if (!(*varp)->root->is_valid) | |
1121 | return INVALID; | |
8b93c638 | 1122 | |
25d5ea92 | 1123 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1124 | { |
25d5ea92 VP |
1125 | /* Save the selected stack frame, since we will need to change it |
1126 | in order to evaluate expressions. */ | |
1127 | old_fid = get_frame_id (deprecated_safe_get_selected_frame ()); | |
1128 | ||
1129 | /* Update the root variable. value_of_root can return NULL | |
1130 | if the variable is no longer around, i.e. we stepped out of | |
1131 | the frame in which a local existed. We are letting the | |
1132 | value_of_root variable dispose of the varobj if the type | |
1133 | has changed. */ | |
1134 | type_changed = 1; | |
1135 | new = value_of_root (varp, &type_changed); | |
1136 | ||
1137 | /* Restore selected frame. */ | |
1138 | fi = frame_find_by_id (old_fid); | |
1139 | if (fi) | |
1140 | select_frame (fi); | |
1141 | ||
1142 | /* If this is a "use_selected_frame" varobj, and its type has changed, | |
1143 | them note that it's changed. */ | |
1144 | if (type_changed) | |
1145 | VEC_safe_push (varobj_p, result, *varp); | |
1146 | ||
1147 | if (install_new_value ((*varp), new, type_changed)) | |
1148 | { | |
1149 | /* If type_changed is 1, install_new_value will never return | |
1150 | non-zero, so we'll never report the same variable twice. */ | |
1151 | gdb_assert (!type_changed); | |
1152 | VEC_safe_push (varobj_p, result, *varp); | |
1153 | } | |
8b93c638 | 1154 | |
25d5ea92 VP |
1155 | if (new == NULL) |
1156 | { | |
1157 | /* This means the varobj itself is out of scope. | |
1158 | Report it. */ | |
1159 | VEC_free (varobj_p, result); | |
1160 | return NOT_IN_SCOPE; | |
1161 | } | |
b20d8971 VP |
1162 | } |
1163 | ||
28335dcc | 1164 | VEC_safe_push (varobj_p, stack, *varp); |
8b93c638 | 1165 | |
8756216b | 1166 | /* Walk through the children, reconstructing them all. */ |
28335dcc | 1167 | while (!VEC_empty (varobj_p, stack)) |
8b93c638 | 1168 | { |
28335dcc VP |
1169 | v = VEC_pop (varobj_p, stack); |
1170 | ||
1171 | /* Push any children. Use reverse order so that the first | |
1172 | child is popped from the work stack first, and so | |
1173 | will be added to result first. This does not | |
1174 | affect correctness, just "nicer". */ | |
1175 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1176 | { |
28335dcc VP |
1177 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1178 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
25d5ea92 | 1179 | if (c != NULL && !c->frozen) |
28335dcc | 1180 | VEC_safe_push (varobj_p, stack, c); |
8b93c638 JM |
1181 | } |
1182 | ||
28335dcc VP |
1183 | /* Update this variable, unless it's a root, which is already |
1184 | updated. */ | |
25d5ea92 | 1185 | if (v->root->rootvar != v) |
28335dcc VP |
1186 | { |
1187 | new = value_of_child (v->parent, v->index); | |
1188 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1189 | { | |
1190 | /* Note that it's changed */ | |
1191 | VEC_safe_push (varobj_p, result, v); | |
1192 | v->updated = 0; | |
1193 | } | |
8b93c638 | 1194 | } |
8b93c638 JM |
1195 | } |
1196 | ||
8756216b | 1197 | /* Alloc (changed + 1) list entries. */ |
28335dcc | 1198 | changed = VEC_length (varobj_p, result); |
8b93c638 | 1199 | *changelist = xmalloc ((changed + 1) * sizeof (struct varobj *)); |
28335dcc | 1200 | cv = *changelist; |
8b93c638 | 1201 | |
28335dcc | 1202 | for (i = 0; i < changed; ++i) |
8b93c638 | 1203 | { |
28335dcc VP |
1204 | *cv = VEC_index (varobj_p, result, i); |
1205 | gdb_assert (*cv != NULL); | |
1206 | ++cv; | |
8b93c638 | 1207 | } |
28335dcc | 1208 | *cv = 0; |
8b93c638 | 1209 | |
93b979d6 NR |
1210 | VEC_free (varobj_p, stack); |
1211 | VEC_free (varobj_p, result); | |
1212 | ||
73a93a32 | 1213 | if (type_changed) |
8756216b | 1214 | return TYPE_CHANGED; |
73a93a32 JI |
1215 | else |
1216 | return changed; | |
8b93c638 JM |
1217 | } |
1218 | \f | |
1219 | ||
1220 | /* Helper functions */ | |
1221 | ||
1222 | /* | |
1223 | * Variable object construction/destruction | |
1224 | */ | |
1225 | ||
1226 | static int | |
fba45db2 KB |
1227 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1228 | int only_children_p) | |
8b93c638 JM |
1229 | { |
1230 | int delcount = 0; | |
1231 | ||
1232 | delete_variable_1 (resultp, &delcount, var, | |
1233 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1234 | ||
1235 | return delcount; | |
1236 | } | |
1237 | ||
1238 | /* Delete the variable object VAR and its children */ | |
1239 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1240 | and the parent is not removed we dump core. It must be always | |
1241 | initially called with remove_from_parent_p set */ | |
1242 | static void | |
72330bd6 AC |
1243 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1244 | struct varobj *var, int only_children_p, | |
1245 | int remove_from_parent_p) | |
8b93c638 | 1246 | { |
28335dcc | 1247 | int i; |
8b93c638 JM |
1248 | |
1249 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1250 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1251 | { | |
1252 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
214270ab VP |
1253 | if (!child) |
1254 | continue; | |
8b93c638 | 1255 | if (!remove_from_parent_p) |
28335dcc VP |
1256 | child->parent = NULL; |
1257 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1258 | } |
28335dcc | 1259 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1260 | |
1261 | /* if we were called to delete only the children we are done here */ | |
1262 | if (only_children_p) | |
1263 | return; | |
1264 | ||
1265 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1266 | /* If the name is null, this is a temporary variable, that has not |
1267 | yet been installed, don't report it, it belongs to the caller... */ | |
1268 | if (var->obj_name != NULL) | |
8b93c638 | 1269 | { |
5b616ba1 | 1270 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1271 | *delcountp = *delcountp + 1; |
1272 | } | |
1273 | ||
1274 | /* If this variable has a parent, remove it from its parent's list */ | |
1275 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1276 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1277 | expensive list search to find the element to remove when we are | |
1278 | discarding the list afterwards */ | |
72330bd6 | 1279 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1280 | { |
28335dcc | 1281 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1282 | } |
72330bd6 | 1283 | |
73a93a32 JI |
1284 | if (var->obj_name != NULL) |
1285 | uninstall_variable (var); | |
8b93c638 JM |
1286 | |
1287 | /* Free memory associated with this variable */ | |
1288 | free_variable (var); | |
1289 | } | |
1290 | ||
1291 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1292 | static int | |
fba45db2 | 1293 | install_variable (struct varobj *var) |
8b93c638 JM |
1294 | { |
1295 | struct vlist *cv; | |
1296 | struct vlist *newvl; | |
1297 | const char *chp; | |
1298 | unsigned int index = 0; | |
1299 | unsigned int i = 1; | |
1300 | ||
1301 | for (chp = var->obj_name; *chp; chp++) | |
1302 | { | |
1303 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1304 | } | |
1305 | ||
1306 | cv = *(varobj_table + index); | |
1307 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1308 | cv = cv->next; | |
1309 | ||
1310 | if (cv != NULL) | |
8a3fe4f8 | 1311 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1312 | |
1313 | /* Add varobj to hash table */ | |
1314 | newvl = xmalloc (sizeof (struct vlist)); | |
1315 | newvl->next = *(varobj_table + index); | |
1316 | newvl->var = var; | |
1317 | *(varobj_table + index) = newvl; | |
1318 | ||
1319 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1320 | if (is_root_p (var)) |
8b93c638 JM |
1321 | { |
1322 | /* Add to list of root variables */ | |
1323 | if (rootlist == NULL) | |
1324 | var->root->next = NULL; | |
1325 | else | |
1326 | var->root->next = rootlist; | |
1327 | rootlist = var->root; | |
1328 | rootcount++; | |
1329 | } | |
1330 | ||
1331 | return 1; /* OK */ | |
1332 | } | |
1333 | ||
1334 | /* Unistall the object VAR. */ | |
1335 | static void | |
fba45db2 | 1336 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1337 | { |
1338 | struct vlist *cv; | |
1339 | struct vlist *prev; | |
1340 | struct varobj_root *cr; | |
1341 | struct varobj_root *prer; | |
1342 | const char *chp; | |
1343 | unsigned int index = 0; | |
1344 | unsigned int i = 1; | |
1345 | ||
1346 | /* Remove varobj from hash table */ | |
1347 | for (chp = var->obj_name; *chp; chp++) | |
1348 | { | |
1349 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1350 | } | |
1351 | ||
1352 | cv = *(varobj_table + index); | |
1353 | prev = NULL; | |
1354 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1355 | { | |
1356 | prev = cv; | |
1357 | cv = cv->next; | |
1358 | } | |
1359 | ||
1360 | if (varobjdebug) | |
1361 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1362 | ||
1363 | if (cv == NULL) | |
1364 | { | |
72330bd6 AC |
1365 | warning |
1366 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1367 | var->obj_name); | |
8b93c638 JM |
1368 | return; |
1369 | } | |
1370 | ||
1371 | if (prev == NULL) | |
1372 | *(varobj_table + index) = cv->next; | |
1373 | else | |
1374 | prev->next = cv->next; | |
1375 | ||
b8c9b27d | 1376 | xfree (cv); |
8b93c638 JM |
1377 | |
1378 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1379 | if (is_root_p (var)) |
8b93c638 JM |
1380 | { |
1381 | /* Remove from list of root variables */ | |
1382 | if (rootlist == var->root) | |
1383 | rootlist = var->root->next; | |
1384 | else | |
1385 | { | |
1386 | prer = NULL; | |
1387 | cr = rootlist; | |
1388 | while ((cr != NULL) && (cr->rootvar != var)) | |
1389 | { | |
1390 | prer = cr; | |
1391 | cr = cr->next; | |
1392 | } | |
1393 | if (cr == NULL) | |
1394 | { | |
72330bd6 AC |
1395 | warning |
1396 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1397 | var->obj_name); | |
8b93c638 JM |
1398 | return; |
1399 | } | |
1400 | if (prer == NULL) | |
1401 | rootlist = NULL; | |
1402 | else | |
1403 | prer->next = cr->next; | |
1404 | } | |
1405 | rootcount--; | |
1406 | } | |
1407 | ||
1408 | } | |
1409 | ||
8b93c638 JM |
1410 | /* Create and install a child of the parent of the given name */ |
1411 | static struct varobj * | |
fba45db2 | 1412 | create_child (struct varobj *parent, int index, char *name) |
8b93c638 JM |
1413 | { |
1414 | struct varobj *child; | |
1415 | char *childs_name; | |
acd65feb | 1416 | struct value *value; |
8b93c638 JM |
1417 | |
1418 | child = new_variable (); | |
1419 | ||
1420 | /* name is allocated by name_of_child */ | |
1421 | child->name = name; | |
1422 | child->index = index; | |
acd65feb | 1423 | value = value_of_child (parent, index); |
8b93c638 JM |
1424 | child->parent = parent; |
1425 | child->root = parent->root; | |
b435e160 | 1426 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1427 | child->obj_name = childs_name; |
1428 | install_variable (child); | |
1429 | ||
acd65feb VP |
1430 | /* Compute the type of the child. Must do this before |
1431 | calling install_new_value. */ | |
1432 | if (value != NULL) | |
1433 | /* If the child had no evaluation errors, var->value | |
1434 | will be non-NULL and contain a valid type. */ | |
1435 | child->type = value_type (value); | |
1436 | else | |
1437 | /* Otherwise, we must compute the type. */ | |
1438 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1439 | child->index); | |
1440 | install_new_value (child, value, 1); | |
1441 | ||
8b93c638 JM |
1442 | return child; |
1443 | } | |
8b93c638 JM |
1444 | \f |
1445 | ||
1446 | /* | |
1447 | * Miscellaneous utility functions. | |
1448 | */ | |
1449 | ||
1450 | /* Allocate memory and initialize a new variable */ | |
1451 | static struct varobj * | |
1452 | new_variable (void) | |
1453 | { | |
1454 | struct varobj *var; | |
1455 | ||
1456 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1457 | var->name = NULL; | |
02142340 | 1458 | var->path_expr = NULL; |
8b93c638 JM |
1459 | var->obj_name = NULL; |
1460 | var->index = -1; | |
1461 | var->type = NULL; | |
1462 | var->value = NULL; | |
8b93c638 JM |
1463 | var->num_children = -1; |
1464 | var->parent = NULL; | |
1465 | var->children = NULL; | |
1466 | var->format = 0; | |
1467 | var->root = NULL; | |
fb9b6b35 | 1468 | var->updated = 0; |
85265413 | 1469 | var->print_value = NULL; |
25d5ea92 VP |
1470 | var->frozen = 0; |
1471 | var->not_fetched = 0; | |
8b93c638 JM |
1472 | |
1473 | return var; | |
1474 | } | |
1475 | ||
1476 | /* Allocate memory and initialize a new root variable */ | |
1477 | static struct varobj * | |
1478 | new_root_variable (void) | |
1479 | { | |
1480 | struct varobj *var = new_variable (); | |
1481 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1482 | var->root->lang = NULL; | |
1483 | var->root->exp = NULL; | |
1484 | var->root->valid_block = NULL; | |
7a424e99 | 1485 | var->root->frame = null_frame_id; |
73a93a32 | 1486 | var->root->use_selected_frame = 0; |
8b93c638 | 1487 | var->root->rootvar = NULL; |
8756216b | 1488 | var->root->is_valid = 1; |
8b93c638 JM |
1489 | |
1490 | return var; | |
1491 | } | |
1492 | ||
1493 | /* Free any allocated memory associated with VAR. */ | |
1494 | static void | |
fba45db2 | 1495 | free_variable (struct varobj *var) |
8b93c638 JM |
1496 | { |
1497 | /* Free the expression if this is a root variable. */ | |
b2c2bd75 | 1498 | if (is_root_p (var)) |
8b93c638 | 1499 | { |
96c1eda2 | 1500 | free_current_contents (&var->root->exp); |
8038e1e2 | 1501 | xfree (var->root); |
8b93c638 JM |
1502 | } |
1503 | ||
8038e1e2 AC |
1504 | xfree (var->name); |
1505 | xfree (var->obj_name); | |
85265413 | 1506 | xfree (var->print_value); |
02142340 | 1507 | xfree (var->path_expr); |
8038e1e2 | 1508 | xfree (var); |
8b93c638 JM |
1509 | } |
1510 | ||
74b7792f AC |
1511 | static void |
1512 | do_free_variable_cleanup (void *var) | |
1513 | { | |
1514 | free_variable (var); | |
1515 | } | |
1516 | ||
1517 | static struct cleanup * | |
1518 | make_cleanup_free_variable (struct varobj *var) | |
1519 | { | |
1520 | return make_cleanup (do_free_variable_cleanup, var); | |
1521 | } | |
1522 | ||
6766a268 DJ |
1523 | /* This returns the type of the variable. It also skips past typedefs |
1524 | to return the real type of the variable. | |
94b66fa7 KS |
1525 | |
1526 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1527 | except within get_target_type and get_type. */ | |
8b93c638 | 1528 | static struct type * |
fba45db2 | 1529 | get_type (struct varobj *var) |
8b93c638 JM |
1530 | { |
1531 | struct type *type; | |
1532 | type = var->type; | |
1533 | ||
6766a268 DJ |
1534 | if (type != NULL) |
1535 | type = check_typedef (type); | |
8b93c638 JM |
1536 | |
1537 | return type; | |
1538 | } | |
1539 | ||
6e2a9270 VP |
1540 | /* Return the type of the value that's stored in VAR, |
1541 | or that would have being stored there if the | |
1542 | value were accessible. | |
1543 | ||
1544 | This differs from VAR->type in that VAR->type is always | |
1545 | the true type of the expession in the source language. | |
1546 | The return value of this function is the type we're | |
1547 | actually storing in varobj, and using for displaying | |
1548 | the values and for comparing previous and new values. | |
1549 | ||
1550 | For example, top-level references are always stripped. */ | |
1551 | static struct type * | |
1552 | get_value_type (struct varobj *var) | |
1553 | { | |
1554 | struct type *type; | |
1555 | ||
1556 | if (var->value) | |
1557 | type = value_type (var->value); | |
1558 | else | |
1559 | type = var->type; | |
1560 | ||
1561 | type = check_typedef (type); | |
1562 | ||
1563 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1564 | type = get_target_type (type); | |
1565 | ||
1566 | type = check_typedef (type); | |
1567 | ||
1568 | return type; | |
1569 | } | |
1570 | ||
8b93c638 | 1571 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
1572 | past typedefs, just like get_type (). |
1573 | ||
1574 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1575 | except within get_target_type and get_type. */ | |
8b93c638 | 1576 | static struct type * |
fba45db2 | 1577 | get_target_type (struct type *type) |
8b93c638 JM |
1578 | { |
1579 | if (type != NULL) | |
1580 | { | |
1581 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1582 | if (type != NULL) |
1583 | type = check_typedef (type); | |
8b93c638 JM |
1584 | } |
1585 | ||
1586 | return type; | |
1587 | } | |
1588 | ||
1589 | /* What is the default display for this variable? We assume that | |
1590 | everything is "natural". Any exceptions? */ | |
1591 | static enum varobj_display_formats | |
fba45db2 | 1592 | variable_default_display (struct varobj *var) |
8b93c638 JM |
1593 | { |
1594 | return FORMAT_NATURAL; | |
1595 | } | |
1596 | ||
8b93c638 JM |
1597 | /* FIXME: The following should be generic for any pointer */ |
1598 | static void | |
fba45db2 | 1599 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
1600 | { |
1601 | struct cpstack *s; | |
1602 | ||
1603 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1604 | s->name = name; | |
1605 | s->next = *pstack; | |
1606 | *pstack = s; | |
1607 | } | |
1608 | ||
1609 | /* FIXME: The following should be generic for any pointer */ | |
1610 | static char * | |
fba45db2 | 1611 | cppop (struct cpstack **pstack) |
8b93c638 JM |
1612 | { |
1613 | struct cpstack *s; | |
1614 | char *v; | |
1615 | ||
1616 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1617 | return NULL; | |
1618 | ||
1619 | s = *pstack; | |
1620 | v = s->name; | |
1621 | *pstack = (*pstack)->next; | |
b8c9b27d | 1622 | xfree (s); |
8b93c638 JM |
1623 | |
1624 | return v; | |
1625 | } | |
1626 | \f | |
1627 | /* | |
1628 | * Language-dependencies | |
1629 | */ | |
1630 | ||
1631 | /* Common entry points */ | |
1632 | ||
1633 | /* Get the language of variable VAR. */ | |
1634 | static enum varobj_languages | |
fba45db2 | 1635 | variable_language (struct varobj *var) |
8b93c638 JM |
1636 | { |
1637 | enum varobj_languages lang; | |
1638 | ||
1639 | switch (var->root->exp->language_defn->la_language) | |
1640 | { | |
1641 | default: | |
1642 | case language_c: | |
1643 | lang = vlang_c; | |
1644 | break; | |
1645 | case language_cplus: | |
1646 | lang = vlang_cplus; | |
1647 | break; | |
1648 | case language_java: | |
1649 | lang = vlang_java; | |
1650 | break; | |
1651 | } | |
1652 | ||
1653 | return lang; | |
1654 | } | |
1655 | ||
1656 | /* Return the number of children for a given variable. | |
1657 | The result of this function is defined by the language | |
1658 | implementation. The number of children returned by this function | |
1659 | is the number of children that the user will see in the variable | |
1660 | display. */ | |
1661 | static int | |
fba45db2 | 1662 | number_of_children (struct varobj *var) |
8b93c638 JM |
1663 | { |
1664 | return (*var->root->lang->number_of_children) (var);; | |
1665 | } | |
1666 | ||
1667 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1668 | static char * | |
fba45db2 | 1669 | name_of_variable (struct varobj *var) |
8b93c638 JM |
1670 | { |
1671 | return (*var->root->lang->name_of_variable) (var); | |
1672 | } | |
1673 | ||
1674 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1675 | static char * | |
fba45db2 | 1676 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
1677 | { |
1678 | return (*var->root->lang->name_of_child) (var, index); | |
1679 | } | |
1680 | ||
30b28db1 | 1681 | /* What is the ``struct value *'' of the root variable VAR? |
73a93a32 JI |
1682 | TYPE_CHANGED controls what to do if the type of a |
1683 | use_selected_frame = 1 variable changes. On input, | |
1684 | TYPE_CHANGED = 1 means discard the old varobj, and replace | |
1685 | it with this one. TYPE_CHANGED = 0 means leave it around. | |
1686 | NB: In both cases, var_handle will point to the new varobj, | |
1687 | so if you use TYPE_CHANGED = 0, you will have to stash the | |
1688 | old varobj pointer away somewhere before calling this. | |
1689 | On return, TYPE_CHANGED will be 1 if the type has changed, and | |
1690 | 0 otherwise. */ | |
30b28db1 | 1691 | static struct value * |
fba45db2 | 1692 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 1693 | { |
73a93a32 JI |
1694 | struct varobj *var; |
1695 | ||
1696 | if (var_handle == NULL) | |
1697 | return NULL; | |
1698 | ||
1699 | var = *var_handle; | |
1700 | ||
1701 | /* This should really be an exception, since this should | |
1702 | only get called with a root variable. */ | |
1703 | ||
b2c2bd75 | 1704 | if (!is_root_p (var)) |
73a93a32 JI |
1705 | return NULL; |
1706 | ||
1707 | if (var->root->use_selected_frame) | |
1708 | { | |
1709 | struct varobj *tmp_var; | |
1710 | char *old_type, *new_type; | |
6225abfa | 1711 | |
73a93a32 JI |
1712 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
1713 | USE_SELECTED_FRAME); | |
1714 | if (tmp_var == NULL) | |
1715 | { | |
1716 | return NULL; | |
1717 | } | |
6225abfa | 1718 | old_type = varobj_get_type (var); |
73a93a32 | 1719 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 1720 | if (strcmp (old_type, new_type) == 0) |
73a93a32 JI |
1721 | { |
1722 | varobj_delete (tmp_var, NULL, 0); | |
1723 | *type_changed = 0; | |
1724 | } | |
1725 | else | |
1726 | { | |
1727 | if (*type_changed) | |
1728 | { | |
72330bd6 | 1729 | tmp_var->obj_name = |
73a93a32 | 1730 | savestring (var->obj_name, strlen (var->obj_name)); |
f7635dd9 | 1731 | varobj_delete (var, NULL, 0); |
73a93a32 JI |
1732 | } |
1733 | else | |
1734 | { | |
72330bd6 | 1735 | tmp_var->obj_name = varobj_gen_name (); |
73a93a32 JI |
1736 | } |
1737 | install_variable (tmp_var); | |
1738 | *var_handle = tmp_var; | |
705da579 | 1739 | var = *var_handle; |
73a93a32 JI |
1740 | *type_changed = 1; |
1741 | } | |
74dddad3 MS |
1742 | xfree (old_type); |
1743 | xfree (new_type); | |
73a93a32 JI |
1744 | } |
1745 | else | |
1746 | { | |
1747 | *type_changed = 0; | |
1748 | } | |
1749 | ||
1750 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1751 | } |
1752 | ||
30b28db1 AC |
1753 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
1754 | static struct value * | |
fba45db2 | 1755 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 1756 | { |
30b28db1 | 1757 | struct value *value; |
8b93c638 JM |
1758 | |
1759 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1760 | ||
8b93c638 JM |
1761 | return value; |
1762 | } | |
1763 | ||
8b93c638 JM |
1764 | /* GDB already has a command called "value_of_variable". Sigh. */ |
1765 | static char * | |
fba45db2 | 1766 | my_value_of_variable (struct varobj *var) |
8b93c638 | 1767 | { |
8756216b DP |
1768 | if (var->root->is_valid) |
1769 | return (*var->root->lang->value_of_variable) (var); | |
1770 | else | |
1771 | return NULL; | |
8b93c638 JM |
1772 | } |
1773 | ||
85265413 NR |
1774 | static char * |
1775 | value_get_print_value (struct value *value, enum varobj_display_formats format) | |
1776 | { | |
1777 | long dummy; | |
57e66780 DJ |
1778 | struct ui_file *stb; |
1779 | struct cleanup *old_chain; | |
85265413 | 1780 | char *thevalue; |
57e66780 DJ |
1781 | |
1782 | if (value == NULL) | |
1783 | return NULL; | |
1784 | ||
1785 | stb = mem_fileopen (); | |
1786 | old_chain = make_cleanup_ui_file_delete (stb); | |
1787 | ||
85265413 NR |
1788 | common_val_print (value, stb, format_code[(int) format], 1, 0, 0); |
1789 | thevalue = ui_file_xstrdup (stb, &dummy); | |
57e66780 | 1790 | |
85265413 NR |
1791 | do_cleanups (old_chain); |
1792 | return thevalue; | |
1793 | } | |
1794 | ||
340a7723 NR |
1795 | int |
1796 | varobj_editable_p (struct varobj *var) | |
1797 | { | |
1798 | struct type *type; | |
1799 | struct value *value; | |
1800 | ||
1801 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
1802 | return 0; | |
1803 | ||
1804 | type = get_value_type (var); | |
1805 | ||
1806 | switch (TYPE_CODE (type)) | |
1807 | { | |
1808 | case TYPE_CODE_STRUCT: | |
1809 | case TYPE_CODE_UNION: | |
1810 | case TYPE_CODE_ARRAY: | |
1811 | case TYPE_CODE_FUNC: | |
1812 | case TYPE_CODE_METHOD: | |
1813 | return 0; | |
1814 | break; | |
1815 | ||
1816 | default: | |
1817 | return 1; | |
1818 | break; | |
1819 | } | |
1820 | } | |
1821 | ||
acd65feb VP |
1822 | /* Return non-zero if changes in value of VAR |
1823 | must be detected and reported by -var-update. | |
1824 | Return zero is -var-update should never report | |
1825 | changes of such values. This makes sense for structures | |
1826 | (since the changes in children values will be reported separately), | |
1827 | or for artifical objects (like 'public' pseudo-field in C++). | |
1828 | ||
1829 | Return value of 0 means that gdb need not call value_fetch_lazy | |
1830 | for the value of this variable object. */ | |
8b93c638 | 1831 | static int |
b2c2bd75 | 1832 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
1833 | { |
1834 | int r; | |
1835 | struct type *type; | |
1836 | ||
1837 | if (CPLUS_FAKE_CHILD (var)) | |
1838 | return 0; | |
1839 | ||
6e2a9270 | 1840 | type = get_value_type (var); |
8b93c638 JM |
1841 | |
1842 | switch (TYPE_CODE (type)) | |
1843 | { | |
72330bd6 AC |
1844 | case TYPE_CODE_STRUCT: |
1845 | case TYPE_CODE_UNION: | |
1846 | case TYPE_CODE_ARRAY: | |
1847 | r = 0; | |
1848 | break; | |
8b93c638 | 1849 | |
72330bd6 AC |
1850 | default: |
1851 | r = 1; | |
8b93c638 JM |
1852 | } |
1853 | ||
1854 | return r; | |
1855 | } | |
1856 | ||
2024f65a VP |
1857 | /* Given the value and the type of a variable object, |
1858 | adjust the value and type to those necessary | |
1859 | for getting children of the variable object. | |
1860 | This includes dereferencing top-level references | |
1861 | to all types and dereferencing pointers to | |
1862 | structures. | |
1863 | ||
1864 | Both TYPE and *TYPE should be non-null. VALUE | |
1865 | can be null if we want to only translate type. | |
1866 | *VALUE can be null as well -- if the parent | |
02142340 VP |
1867 | value is not known. |
1868 | ||
1869 | If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1 | |
1870 | depending on whether pointer was deferenced | |
1871 | in this function. */ | |
2024f65a VP |
1872 | static void |
1873 | adjust_value_for_child_access (struct value **value, | |
02142340 VP |
1874 | struct type **type, |
1875 | int *was_ptr) | |
2024f65a VP |
1876 | { |
1877 | gdb_assert (type && *type); | |
1878 | ||
02142340 VP |
1879 | if (was_ptr) |
1880 | *was_ptr = 0; | |
1881 | ||
2024f65a VP |
1882 | *type = check_typedef (*type); |
1883 | ||
1884 | /* The type of value stored in varobj, that is passed | |
1885 | to us, is already supposed to be | |
1886 | reference-stripped. */ | |
1887 | ||
1888 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
1889 | ||
1890 | /* Pointers to structures are treated just like | |
1891 | structures when accessing children. Don't | |
1892 | dererences pointers to other types. */ | |
1893 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
1894 | { | |
1895 | struct type *target_type = get_target_type (*type); | |
1896 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
1897 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
1898 | { | |
1899 | if (value && *value) | |
3f4178d6 DJ |
1900 | { |
1901 | int success = gdb_value_ind (*value, value); | |
1902 | if (!success) | |
1903 | *value = NULL; | |
1904 | } | |
2024f65a | 1905 | *type = target_type; |
02142340 VP |
1906 | if (was_ptr) |
1907 | *was_ptr = 1; | |
2024f65a VP |
1908 | } |
1909 | } | |
1910 | ||
1911 | /* The 'get_target_type' function calls check_typedef on | |
1912 | result, so we can immediately check type code. No | |
1913 | need to call check_typedef here. */ | |
1914 | } | |
1915 | ||
8b93c638 JM |
1916 | /* C */ |
1917 | static int | |
fba45db2 | 1918 | c_number_of_children (struct varobj *var) |
8b93c638 | 1919 | { |
2024f65a VP |
1920 | struct type *type = get_value_type (var); |
1921 | int children = 0; | |
8b93c638 | 1922 | struct type *target; |
8b93c638 | 1923 | |
02142340 | 1924 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 | 1925 | target = get_target_type (type); |
8b93c638 JM |
1926 | |
1927 | switch (TYPE_CODE (type)) | |
1928 | { | |
1929 | case TYPE_CODE_ARRAY: | |
1930 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
72330bd6 | 1931 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) |
8b93c638 JM |
1932 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
1933 | else | |
74a44383 DJ |
1934 | /* If we don't know how many elements there are, don't display |
1935 | any. */ | |
1936 | children = 0; | |
8b93c638 JM |
1937 | break; |
1938 | ||
1939 | case TYPE_CODE_STRUCT: | |
1940 | case TYPE_CODE_UNION: | |
1941 | children = TYPE_NFIELDS (type); | |
1942 | break; | |
1943 | ||
1944 | case TYPE_CODE_PTR: | |
2024f65a VP |
1945 | /* The type here is a pointer to non-struct. Typically, pointers |
1946 | have one child, except for function ptrs, which have no children, | |
1947 | and except for void*, as we don't know what to show. | |
1948 | ||
0755e6c1 FN |
1949 | We can show char* so we allow it to be dereferenced. If you decide |
1950 | to test for it, please mind that a little magic is necessary to | |
1951 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
1952 | TYPE_NAME == "char" */ | |
2024f65a VP |
1953 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
1954 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
1955 | children = 0; | |
1956 | else | |
1957 | children = 1; | |
8b93c638 JM |
1958 | break; |
1959 | ||
1960 | default: | |
1961 | /* Other types have no children */ | |
1962 | break; | |
1963 | } | |
1964 | ||
1965 | return children; | |
1966 | } | |
1967 | ||
1968 | static char * | |
fba45db2 | 1969 | c_name_of_variable (struct varobj *parent) |
8b93c638 JM |
1970 | { |
1971 | return savestring (parent->name, strlen (parent->name)); | |
1972 | } | |
1973 | ||
bbec2603 VP |
1974 | /* Return the value of element TYPE_INDEX of a structure |
1975 | value VALUE. VALUE's type should be a structure, | |
1976 | or union, or a typedef to struct/union. | |
1977 | ||
1978 | Returns NULL if getting the value fails. Never throws. */ | |
1979 | static struct value * | |
1980 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 1981 | { |
bbec2603 VP |
1982 | struct value *result = NULL; |
1983 | volatile struct gdb_exception e; | |
8b93c638 | 1984 | |
bbec2603 VP |
1985 | struct type *type = value_type (value); |
1986 | type = check_typedef (type); | |
1987 | ||
1988 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
1989 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 1990 | |
bbec2603 VP |
1991 | TRY_CATCH (e, RETURN_MASK_ERROR) |
1992 | { | |
1993 | if (TYPE_FIELD_STATIC (type, type_index)) | |
1994 | result = value_static_field (type, type_index); | |
1995 | else | |
1996 | result = value_primitive_field (value, 0, type_index, type); | |
1997 | } | |
1998 | if (e.reason < 0) | |
1999 | { | |
2000 | return NULL; | |
2001 | } | |
2002 | else | |
2003 | { | |
2004 | return result; | |
2005 | } | |
2006 | } | |
2007 | ||
2008 | /* Obtain the information about child INDEX of the variable | |
2009 | object PARENT. | |
2010 | If CNAME is not null, sets *CNAME to the name of the child relative | |
2011 | to the parent. | |
2012 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
2013 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
2014 | ||
2015 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
2016 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
2017 | to NULL. */ | |
2018 | static void | |
2019 | c_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2020 | char **cname, struct value **cvalue, struct type **ctype, |
2021 | char **cfull_expression) | |
bbec2603 VP |
2022 | { |
2023 | struct value *value = parent->value; | |
2024f65a | 2024 | struct type *type = get_value_type (parent); |
02142340 VP |
2025 | char *parent_expression = NULL; |
2026 | int was_ptr; | |
bbec2603 VP |
2027 | |
2028 | if (cname) | |
2029 | *cname = NULL; | |
2030 | if (cvalue) | |
2031 | *cvalue = NULL; | |
2032 | if (ctype) | |
2033 | *ctype = NULL; | |
02142340 VP |
2034 | if (cfull_expression) |
2035 | { | |
2036 | *cfull_expression = NULL; | |
2037 | parent_expression = varobj_get_path_expr (parent); | |
2038 | } | |
2039 | adjust_value_for_child_access (&value, &type, &was_ptr); | |
bbec2603 | 2040 | |
8b93c638 JM |
2041 | switch (TYPE_CODE (type)) |
2042 | { | |
2043 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
2044 | if (cname) |
2045 | *cname = xstrprintf ("%d", index | |
2046 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2047 | ||
2048 | if (cvalue && value) | |
2049 | { | |
2050 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
2051 | struct value *indval = | |
2052 | value_from_longest (builtin_type_int, (LONGEST) real_index); | |
2053 | gdb_value_subscript (value, indval, cvalue); | |
2054 | } | |
2055 | ||
2056 | if (ctype) | |
2057 | *ctype = get_target_type (type); | |
2058 | ||
02142340 VP |
2059 | if (cfull_expression) |
2060 | *cfull_expression = xstrprintf ("(%s)[%d]", parent_expression, | |
2061 | index | |
2062 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2063 | ||
2064 | ||
8b93c638 JM |
2065 | break; |
2066 | ||
2067 | case TYPE_CODE_STRUCT: | |
2068 | case TYPE_CODE_UNION: | |
bbec2603 VP |
2069 | if (cname) |
2070 | { | |
2071 | char *string = TYPE_FIELD_NAME (type, index); | |
2072 | *cname = savestring (string, strlen (string)); | |
2073 | } | |
2074 | ||
2075 | if (cvalue && value) | |
2076 | { | |
2077 | /* For C, varobj index is the same as type index. */ | |
2078 | *cvalue = value_struct_element_index (value, index); | |
2079 | } | |
2080 | ||
2081 | if (ctype) | |
2082 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2083 | ||
02142340 VP |
2084 | if (cfull_expression) |
2085 | { | |
2086 | char *join = was_ptr ? "->" : "."; | |
2087 | *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, join, | |
2088 | TYPE_FIELD_NAME (type, index)); | |
2089 | } | |
2090 | ||
8b93c638 JM |
2091 | break; |
2092 | ||
2093 | case TYPE_CODE_PTR: | |
bbec2603 VP |
2094 | if (cname) |
2095 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 2096 | |
bbec2603 | 2097 | if (cvalue && value) |
3f4178d6 DJ |
2098 | { |
2099 | int success = gdb_value_ind (value, cvalue); | |
2100 | if (!success) | |
2101 | *cvalue = NULL; | |
2102 | } | |
bbec2603 | 2103 | |
2024f65a VP |
2104 | /* Don't use get_target_type because it calls |
2105 | check_typedef and here, we want to show the true | |
2106 | declared type of the variable. */ | |
bbec2603 | 2107 | if (ctype) |
2024f65a | 2108 | *ctype = TYPE_TARGET_TYPE (type); |
02142340 VP |
2109 | |
2110 | if (cfull_expression) | |
2111 | *cfull_expression = xstrprintf ("*(%s)", parent_expression); | |
bbec2603 | 2112 | |
8b93c638 JM |
2113 | break; |
2114 | ||
2115 | default: | |
2116 | /* This should not happen */ | |
bbec2603 VP |
2117 | if (cname) |
2118 | *cname = xstrdup ("???"); | |
02142340 VP |
2119 | if (cfull_expression) |
2120 | *cfull_expression = xstrdup ("???"); | |
bbec2603 | 2121 | /* Don't set value and type, we don't know then. */ |
8b93c638 | 2122 | } |
bbec2603 | 2123 | } |
8b93c638 | 2124 | |
bbec2603 VP |
2125 | static char * |
2126 | c_name_of_child (struct varobj *parent, int index) | |
2127 | { | |
2128 | char *name; | |
02142340 | 2129 | c_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2130 | return name; |
2131 | } | |
2132 | ||
02142340 VP |
2133 | static char * |
2134 | c_path_expr_of_child (struct varobj *child) | |
2135 | { | |
2136 | c_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2137 | &child->path_expr); | |
2138 | return child->path_expr; | |
2139 | } | |
2140 | ||
30b28db1 | 2141 | static struct value * |
fba45db2 | 2142 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 2143 | { |
5e572bb4 | 2144 | struct value *new_val = NULL; |
73a93a32 | 2145 | struct varobj *var = *var_handle; |
8b93c638 JM |
2146 | struct frame_info *fi; |
2147 | int within_scope; | |
2148 | ||
73a93a32 | 2149 | /* Only root variables can be updated... */ |
b2c2bd75 | 2150 | if (!is_root_p (var)) |
73a93a32 JI |
2151 | /* Not a root var */ |
2152 | return NULL; | |
2153 | ||
72330bd6 | 2154 | |
8b93c638 | 2155 | /* Determine whether the variable is still around. */ |
b20d8971 | 2156 | if (var->root->valid_block == NULL || var->root->use_selected_frame) |
8b93c638 JM |
2157 | within_scope = 1; |
2158 | else | |
2159 | { | |
e64d9b3d | 2160 | fi = frame_find_by_id (var->root->frame); |
8b93c638 JM |
2161 | within_scope = fi != NULL; |
2162 | /* FIXME: select_frame could fail */ | |
d2353924 NR |
2163 | if (fi) |
2164 | { | |
2165 | CORE_ADDR pc = get_frame_pc (fi); | |
2166 | if (pc < BLOCK_START (var->root->valid_block) || | |
2167 | pc >= BLOCK_END (var->root->valid_block)) | |
2168 | within_scope = 0; | |
2d43bda2 NR |
2169 | else |
2170 | select_frame (fi); | |
d2353924 | 2171 | } |
8b93c638 | 2172 | } |
72330bd6 | 2173 | |
8b93c638 JM |
2174 | if (within_scope) |
2175 | { | |
73a93a32 | 2176 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
2177 | expression fails we want to just return NULL. */ |
2178 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
2179 | return new_val; |
2180 | } | |
2181 | ||
2182 | return NULL; | |
2183 | } | |
2184 | ||
30b28db1 | 2185 | static struct value * |
fba45db2 | 2186 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2187 | { |
bbec2603 | 2188 | struct value *value = NULL; |
02142340 | 2189 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2190 | |
2191 | return value; | |
2192 | } | |
2193 | ||
2194 | static struct type * | |
fba45db2 | 2195 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2196 | { |
bbec2603 | 2197 | struct type *type = NULL; |
02142340 | 2198 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2199 | return type; |
2200 | } | |
2201 | ||
8b93c638 | 2202 | static char * |
fba45db2 | 2203 | c_value_of_variable (struct varobj *var) |
8b93c638 | 2204 | { |
14b3d9c9 JB |
2205 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2206 | it will print out its children instead of "{...}". So we need to | |
2207 | catch that case explicitly. */ | |
2208 | struct type *type = get_type (var); | |
e64d9b3d | 2209 | |
14b3d9c9 JB |
2210 | /* Strip top-level references. */ |
2211 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2212 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2213 | ||
2214 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2215 | { |
2216 | case TYPE_CODE_STRUCT: | |
2217 | case TYPE_CODE_UNION: | |
2218 | return xstrdup ("{...}"); | |
2219 | /* break; */ | |
2220 | ||
2221 | case TYPE_CODE_ARRAY: | |
2222 | { | |
e64d9b3d | 2223 | char *number; |
b435e160 | 2224 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2225 | return (number); |
8b93c638 JM |
2226 | } |
2227 | /* break; */ | |
2228 | ||
2229 | default: | |
2230 | { | |
575bbeb6 KS |
2231 | if (var->value == NULL) |
2232 | { | |
2233 | /* This can happen if we attempt to get the value of a struct | |
2234 | member when the parent is an invalid pointer. This is an | |
2235 | error condition, so we should tell the caller. */ | |
2236 | return NULL; | |
2237 | } | |
2238 | else | |
2239 | { | |
25d5ea92 VP |
2240 | if (var->not_fetched && value_lazy (var->value)) |
2241 | /* Frozen variable and no value yet. We don't | |
2242 | implicitly fetch the value. MI response will | |
2243 | use empty string for the value, which is OK. */ | |
2244 | return NULL; | |
2245 | ||
b2c2bd75 | 2246 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2247 | gdb_assert (!value_lazy (var->value)); |
85265413 NR |
2248 | return value_get_print_value (var->value, var->format); |
2249 | } | |
e64d9b3d | 2250 | } |
8b93c638 JM |
2251 | } |
2252 | } | |
2253 | \f | |
2254 | ||
2255 | /* C++ */ | |
2256 | ||
2257 | static int | |
fba45db2 | 2258 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2259 | { |
2260 | struct type *type; | |
2261 | int children, dont_know; | |
2262 | ||
2263 | dont_know = 1; | |
2264 | children = 0; | |
2265 | ||
2266 | if (!CPLUS_FAKE_CHILD (var)) | |
2267 | { | |
2024f65a | 2268 | type = get_value_type (var); |
02142340 | 2269 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2270 | |
2271 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2272 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2273 | { |
2274 | int kids[3]; | |
2275 | ||
2276 | cplus_class_num_children (type, kids); | |
2277 | if (kids[v_public] != 0) | |
2278 | children++; | |
2279 | if (kids[v_private] != 0) | |
2280 | children++; | |
2281 | if (kids[v_protected] != 0) | |
2282 | children++; | |
2283 | ||
2284 | /* Add any baseclasses */ | |
2285 | children += TYPE_N_BASECLASSES (type); | |
2286 | dont_know = 0; | |
2287 | ||
2288 | /* FIXME: save children in var */ | |
2289 | } | |
2290 | } | |
2291 | else | |
2292 | { | |
2293 | int kids[3]; | |
2294 | ||
2024f65a | 2295 | type = get_value_type (var->parent); |
02142340 | 2296 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2297 | |
2298 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2299 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2300 | children = kids[v_public]; |
6e382aa3 | 2301 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2302 | children = kids[v_private]; |
2303 | else | |
2304 | children = kids[v_protected]; | |
2305 | dont_know = 0; | |
2306 | } | |
2307 | ||
2308 | if (dont_know) | |
2309 | children = c_number_of_children (var); | |
2310 | ||
2311 | return children; | |
2312 | } | |
2313 | ||
2314 | /* Compute # of public, private, and protected variables in this class. | |
2315 | That means we need to descend into all baseclasses and find out | |
2316 | how many are there, too. */ | |
2317 | static void | |
1669605f | 2318 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2319 | { |
2320 | int i; | |
2321 | ||
2322 | children[v_public] = 0; | |
2323 | children[v_private] = 0; | |
2324 | children[v_protected] = 0; | |
2325 | ||
2326 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2327 | { | |
2328 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2329 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2330 | continue; |
2331 | ||
2332 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2333 | children[v_protected]++; | |
2334 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2335 | children[v_private]++; | |
2336 | else | |
2337 | children[v_public]++; | |
2338 | } | |
2339 | } | |
2340 | ||
2341 | static char * | |
fba45db2 | 2342 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2343 | { |
2344 | return c_name_of_variable (parent); | |
2345 | } | |
2346 | ||
2024f65a VP |
2347 | enum accessibility { private_field, protected_field, public_field }; |
2348 | ||
2349 | /* Check if field INDEX of TYPE has the specified accessibility. | |
2350 | Return 0 if so and 1 otherwise. */ | |
2351 | static int | |
2352 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 2353 | { |
2024f65a VP |
2354 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
2355 | return 1; | |
2356 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
2357 | return 1; | |
2358 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
2359 | && !TYPE_FIELD_PROTECTED (type, index)) | |
2360 | return 1; | |
2361 | else | |
2362 | return 0; | |
2363 | } | |
2364 | ||
2365 | static void | |
2366 | cplus_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2367 | char **cname, struct value **cvalue, struct type **ctype, |
2368 | char **cfull_expression) | |
2024f65a | 2369 | { |
348144ba | 2370 | char *name = NULL; |
2024f65a | 2371 | struct value *value; |
8b93c638 | 2372 | struct type *type; |
02142340 VP |
2373 | int was_ptr; |
2374 | char *parent_expression = NULL; | |
8b93c638 | 2375 | |
2024f65a VP |
2376 | if (cname) |
2377 | *cname = NULL; | |
2378 | if (cvalue) | |
2379 | *cvalue = NULL; | |
2380 | if (ctype) | |
2381 | *ctype = NULL; | |
02142340 VP |
2382 | if (cfull_expression) |
2383 | *cfull_expression = NULL; | |
2024f65a | 2384 | |
8b93c638 JM |
2385 | if (CPLUS_FAKE_CHILD (parent)) |
2386 | { | |
2024f65a VP |
2387 | value = parent->parent->value; |
2388 | type = get_value_type (parent->parent); | |
02142340 VP |
2389 | if (cfull_expression) |
2390 | parent_expression = varobj_get_path_expr (parent->parent); | |
8b93c638 JM |
2391 | } |
2392 | else | |
2024f65a VP |
2393 | { |
2394 | value = parent->value; | |
2395 | type = get_value_type (parent); | |
02142340 VP |
2396 | if (cfull_expression) |
2397 | parent_expression = varobj_get_path_expr (parent); | |
2024f65a | 2398 | } |
8b93c638 | 2399 | |
02142340 | 2400 | adjust_value_for_child_access (&value, &type, &was_ptr); |
2024f65a VP |
2401 | |
2402 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
3f4178d6 | 2403 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
8b93c638 | 2404 | { |
02142340 | 2405 | char *join = was_ptr ? "->" : "."; |
8b93c638 JM |
2406 | if (CPLUS_FAKE_CHILD (parent)) |
2407 | { | |
6e382aa3 JJ |
2408 | /* The fields of the class type are ordered as they |
2409 | appear in the class. We are given an index for a | |
2410 | particular access control type ("public","protected", | |
2411 | or "private"). We must skip over fields that don't | |
2412 | have the access control we are looking for to properly | |
2413 | find the indexed field. */ | |
2414 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 2415 | enum accessibility acc = public_field; |
6e382aa3 | 2416 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 2417 | acc = private_field; |
6e382aa3 | 2418 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
2419 | acc = protected_field; |
2420 | ||
2421 | while (index >= 0) | |
6e382aa3 | 2422 | { |
2024f65a VP |
2423 | if (TYPE_VPTR_BASETYPE (type) == type |
2424 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2425 | ; /* ignore vptr */ | |
2426 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
2427 | --index; |
2428 | ++type_index; | |
6e382aa3 | 2429 | } |
2024f65a VP |
2430 | --type_index; |
2431 | ||
2432 | if (cname) | |
2433 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
2434 | ||
2435 | if (cvalue && value) | |
2436 | *cvalue = value_struct_element_index (value, type_index); | |
2437 | ||
2438 | if (ctype) | |
2439 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
02142340 VP |
2440 | |
2441 | if (cfull_expression) | |
2442 | *cfull_expression = xstrprintf ("((%s)%s%s)", parent_expression, | |
2443 | join, | |
2444 | TYPE_FIELD_NAME (type, type_index)); | |
2024f65a VP |
2445 | } |
2446 | else if (index < TYPE_N_BASECLASSES (type)) | |
2447 | { | |
2448 | /* This is a baseclass. */ | |
2449 | if (cname) | |
2450 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
2451 | ||
2452 | if (cvalue && value) | |
6e382aa3 | 2453 | { |
2024f65a | 2454 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
02142340 | 2455 | release_value (*cvalue); |
6e382aa3 JJ |
2456 | } |
2457 | ||
2024f65a VP |
2458 | if (ctype) |
2459 | { | |
2460 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2461 | } | |
02142340 VP |
2462 | |
2463 | if (cfull_expression) | |
2464 | { | |
2465 | char *ptr = was_ptr ? "*" : ""; | |
2466 | /* Cast the parent to the base' type. Note that in gdb, | |
2467 | expression like | |
2468 | (Base1)d | |
2469 | will create an lvalue, for all appearences, so we don't | |
2470 | need to use more fancy: | |
2471 | *(Base1*)(&d) | |
2472 | construct. */ | |
2473 | *cfull_expression = xstrprintf ("(%s(%s%s) %s)", | |
2474 | ptr, | |
2475 | TYPE_FIELD_NAME (type, index), | |
2476 | ptr, | |
2477 | parent_expression); | |
2478 | } | |
8b93c638 | 2479 | } |
8b93c638 JM |
2480 | else |
2481 | { | |
348144ba | 2482 | char *access = NULL; |
6e382aa3 | 2483 | int children[3]; |
2024f65a | 2484 | cplus_class_num_children (type, children); |
6e382aa3 | 2485 | |
8b93c638 | 2486 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2487 | only be "public", "private", or "protected" |
2488 | ||
2489 | The special "fake" children are always output by varobj in | |
2490 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2491 | index -= TYPE_N_BASECLASSES (type); |
2492 | switch (index) | |
2493 | { | |
2494 | case 0: | |
6e382aa3 | 2495 | if (children[v_public] > 0) |
2024f65a | 2496 | access = "public"; |
6e382aa3 | 2497 | else if (children[v_private] > 0) |
2024f65a | 2498 | access = "private"; |
6e382aa3 | 2499 | else |
2024f65a | 2500 | access = "protected"; |
6e382aa3 | 2501 | break; |
8b93c638 | 2502 | case 1: |
6e382aa3 | 2503 | if (children[v_public] > 0) |
8b93c638 | 2504 | { |
6e382aa3 | 2505 | if (children[v_private] > 0) |
2024f65a | 2506 | access = "private"; |
6e382aa3 | 2507 | else |
2024f65a | 2508 | access = "protected"; |
8b93c638 | 2509 | } |
6e382aa3 | 2510 | else if (children[v_private] > 0) |
2024f65a | 2511 | access = "protected"; |
6e382aa3 | 2512 | break; |
8b93c638 | 2513 | case 2: |
6e382aa3 | 2514 | /* Must be protected */ |
2024f65a | 2515 | access = "protected"; |
6e382aa3 | 2516 | break; |
8b93c638 JM |
2517 | default: |
2518 | /* error! */ | |
2519 | break; | |
2520 | } | |
348144ba MS |
2521 | |
2522 | gdb_assert (access); | |
2024f65a VP |
2523 | if (cname) |
2524 | *cname = xstrdup (access); | |
8b93c638 | 2525 | |
02142340 | 2526 | /* Value and type and full expression are null here. */ |
2024f65a | 2527 | } |
8b93c638 | 2528 | } |
8b93c638 JM |
2529 | else |
2530 | { | |
02142340 | 2531 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
2024f65a VP |
2532 | } |
2533 | } | |
8b93c638 | 2534 | |
2024f65a VP |
2535 | static char * |
2536 | cplus_name_of_child (struct varobj *parent, int index) | |
2537 | { | |
2538 | char *name = NULL; | |
02142340 | 2539 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2540 | return name; |
2541 | } | |
2542 | ||
02142340 VP |
2543 | static char * |
2544 | cplus_path_expr_of_child (struct varobj *child) | |
2545 | { | |
2546 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2547 | &child->path_expr); | |
2548 | return child->path_expr; | |
2549 | } | |
2550 | ||
30b28db1 | 2551 | static struct value * |
fba45db2 | 2552 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2553 | { |
73a93a32 | 2554 | return c_value_of_root (var_handle); |
8b93c638 JM |
2555 | } |
2556 | ||
30b28db1 | 2557 | static struct value * |
fba45db2 | 2558 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2559 | { |
2024f65a | 2560 | struct value *value = NULL; |
02142340 | 2561 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2562 | return value; |
2563 | } | |
2564 | ||
2565 | static struct type * | |
fba45db2 | 2566 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2567 | { |
2024f65a | 2568 | struct type *type = NULL; |
02142340 | 2569 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2570 | return type; |
2571 | } | |
2572 | ||
8b93c638 | 2573 | static char * |
fba45db2 | 2574 | cplus_value_of_variable (struct varobj *var) |
8b93c638 JM |
2575 | { |
2576 | ||
2577 | /* If we have one of our special types, don't print out | |
2578 | any value. */ | |
2579 | if (CPLUS_FAKE_CHILD (var)) | |
2580 | return xstrdup (""); | |
2581 | ||
2582 | return c_value_of_variable (var); | |
2583 | } | |
2584 | \f | |
2585 | /* Java */ | |
2586 | ||
2587 | static int | |
fba45db2 | 2588 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2589 | { |
2590 | return cplus_number_of_children (var); | |
2591 | } | |
2592 | ||
2593 | static char * | |
fba45db2 | 2594 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2595 | { |
2596 | char *p, *name; | |
2597 | ||
2598 | name = cplus_name_of_variable (parent); | |
2599 | /* If the name has "-" in it, it is because we | |
2600 | needed to escape periods in the name... */ | |
2601 | p = name; | |
2602 | ||
2603 | while (*p != '\000') | |
2604 | { | |
2605 | if (*p == '-') | |
2606 | *p = '.'; | |
2607 | p++; | |
2608 | } | |
2609 | ||
2610 | return name; | |
2611 | } | |
2612 | ||
2613 | static char * | |
fba45db2 | 2614 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2615 | { |
2616 | char *name, *p; | |
2617 | ||
2618 | name = cplus_name_of_child (parent, index); | |
2619 | /* Escape any periods in the name... */ | |
2620 | p = name; | |
2621 | ||
2622 | while (*p != '\000') | |
2623 | { | |
2624 | if (*p == '.') | |
2625 | *p = '-'; | |
2626 | p++; | |
2627 | } | |
2628 | ||
2629 | return name; | |
2630 | } | |
2631 | ||
02142340 VP |
2632 | static char * |
2633 | java_path_expr_of_child (struct varobj *child) | |
2634 | { | |
2635 | return NULL; | |
2636 | } | |
2637 | ||
30b28db1 | 2638 | static struct value * |
fba45db2 | 2639 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2640 | { |
73a93a32 | 2641 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2642 | } |
2643 | ||
30b28db1 | 2644 | static struct value * |
fba45db2 | 2645 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2646 | { |
2647 | return cplus_value_of_child (parent, index); | |
2648 | } | |
2649 | ||
2650 | static struct type * | |
fba45db2 | 2651 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2652 | { |
2653 | return cplus_type_of_child (parent, index); | |
2654 | } | |
2655 | ||
8b93c638 | 2656 | static char * |
fba45db2 | 2657 | java_value_of_variable (struct varobj *var) |
8b93c638 JM |
2658 | { |
2659 | return cplus_value_of_variable (var); | |
2660 | } | |
2661 | \f | |
2662 | extern void _initialize_varobj (void); | |
2663 | void | |
2664 | _initialize_varobj (void) | |
2665 | { | |
2666 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2667 | ||
2668 | varobj_table = xmalloc (sizeof_table); | |
2669 | memset (varobj_table, 0, sizeof_table); | |
2670 | ||
85c07804 AC |
2671 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2672 | &varobjdebug, _("\ | |
2673 | Set varobj debugging."), _("\ | |
2674 | Show varobj debugging."), _("\ | |
2675 | When non-zero, varobj debugging is enabled."), | |
2676 | NULL, | |
920d2a44 | 2677 | show_varobjdebug, |
85c07804 | 2678 | &setlist, &showlist); |
8b93c638 | 2679 | } |
8756216b DP |
2680 | |
2681 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2682 | are defined on globals. | |
2683 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2684 | void | |
2685 | varobj_invalidate (void) | |
2686 | { | |
2687 | struct varobj **all_rootvarobj; | |
2688 | struct varobj **varp; | |
2689 | ||
2690 | if (varobj_list (&all_rootvarobj) > 0) | |
2691 | { | |
2692 | varp = all_rootvarobj; | |
2693 | while (*varp != NULL) | |
2694 | { | |
2695 | /* global var must be re-evaluated. */ | |
2696 | if ((*varp)->root->valid_block == NULL) | |
2697 | { | |
2698 | struct varobj *tmp_var; | |
2699 | ||
2700 | /* Try to create a varobj with same expression. If we succeed replace | |
2701 | the old varobj, otherwise invalidate it. */ | |
2702 | tmp_var = varobj_create (NULL, (*varp)->name, (CORE_ADDR) 0, USE_CURRENT_FRAME); | |
2703 | if (tmp_var != NULL) | |
2704 | { | |
2705 | tmp_var->obj_name = xstrdup ((*varp)->obj_name); | |
2706 | varobj_delete (*varp, NULL, 0); | |
2707 | install_variable (tmp_var); | |
2708 | } | |
2709 | else | |
2710 | (*varp)->root->is_valid = 0; | |
2711 | } | |
2712 | else /* locals must be invalidated. */ | |
2713 | (*varp)->root->is_valid = 0; | |
2714 | ||
2715 | varp++; | |
2716 | } | |
2717 | xfree (all_rootvarobj); | |
2718 | } | |
2719 | return; | |
2720 | } |