Commit | Line | Data |
---|---|---|
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" |
6208b47d VP |
34 | #include "gdbthread.h" |
35 | #include "inferior.h" | |
8b93c638 JM |
36 | |
37 | /* Non-zero if we want to see trace of varobj level stuff. */ | |
38 | ||
39 | int varobjdebug = 0; | |
920d2a44 AC |
40 | static void |
41 | show_varobjdebug (struct ui_file *file, int from_tty, | |
42 | struct cmd_list_element *c, const char *value) | |
43 | { | |
44 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
45 | } | |
8b93c638 JM |
46 | |
47 | /* String representations of gdb's format codes */ | |
48 | char *varobj_format_string[] = | |
72330bd6 | 49 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
50 | |
51 | /* String representations of gdb's known languages */ | |
72330bd6 | 52 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
53 | |
54 | /* Data structures */ | |
55 | ||
56 | /* Every root variable has one of these structures saved in its | |
57 | varobj. Members which must be free'd are noted. */ | |
58 | struct varobj_root | |
72330bd6 | 59 | { |
8b93c638 | 60 | |
72330bd6 AC |
61 | /* Alloc'd expression for this parent. */ |
62 | struct expression *exp; | |
8b93c638 | 63 | |
72330bd6 AC |
64 | /* Block for which this expression is valid */ |
65 | struct block *valid_block; | |
8b93c638 | 66 | |
44a67aa7 VP |
67 | /* The frame for this expression. This field is set iff valid_block is |
68 | not NULL. */ | |
e64d9b3d | 69 | struct frame_id frame; |
8b93c638 | 70 | |
72330bd6 AC |
71 | /* If 1, "update" always recomputes the frame & valid block |
72 | using the currently selected frame. */ | |
73 | int use_selected_frame; | |
73a93a32 | 74 | |
8756216b DP |
75 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
76 | to symbols that do not exist anymore. */ | |
77 | int is_valid; | |
78 | ||
72330bd6 AC |
79 | /* Language info for this variable and its children */ |
80 | struct language_specific *lang; | |
8b93c638 | 81 | |
72330bd6 AC |
82 | /* The varobj for this root node. */ |
83 | struct varobj *rootvar; | |
8b93c638 | 84 | |
72330bd6 AC |
85 | /* Next root variable */ |
86 | struct varobj_root *next; | |
87 | }; | |
8b93c638 JM |
88 | |
89 | /* Every variable in the system has a structure of this type defined | |
90 | for it. This structure holds all information necessary to manipulate | |
91 | a particular object variable. Members which must be freed are noted. */ | |
92 | struct varobj | |
72330bd6 | 93 | { |
8b93c638 | 94 | |
72330bd6 AC |
95 | /* Alloc'd name of the variable for this object.. If this variable is a |
96 | child, then this name will be the child's source name. | |
97 | (bar, not foo.bar) */ | |
98 | /* NOTE: This is the "expression" */ | |
99 | char *name; | |
8b93c638 | 100 | |
02142340 VP |
101 | /* Alloc'd expression for this child. Can be used to create a |
102 | root variable corresponding to this child. */ | |
103 | char *path_expr; | |
104 | ||
72330bd6 AC |
105 | /* The alloc'd name for this variable's object. This is here for |
106 | convenience when constructing this object's children. */ | |
107 | char *obj_name; | |
8b93c638 | 108 | |
72330bd6 AC |
109 | /* Index of this variable in its parent or -1 */ |
110 | int index; | |
8b93c638 | 111 | |
202ddcaa VP |
112 | /* The type of this variable. This can be NULL |
113 | for artifial variable objects -- currently, the "accessibility" | |
114 | variable objects in C++. */ | |
72330bd6 | 115 | struct type *type; |
8b93c638 | 116 | |
b20d8971 VP |
117 | /* The value of this expression or subexpression. A NULL value |
118 | indicates there was an error getting this value. | |
b2c2bd75 VP |
119 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
120 | the value is either NULL, or not lazy. */ | |
30b28db1 | 121 | struct value *value; |
8b93c638 | 122 | |
72330bd6 AC |
123 | /* The number of (immediate) children this variable has */ |
124 | int num_children; | |
8b93c638 | 125 | |
72330bd6 AC |
126 | /* If this object is a child, this points to its immediate parent. */ |
127 | struct varobj *parent; | |
8b93c638 | 128 | |
28335dcc VP |
129 | /* Children of this object. */ |
130 | VEC (varobj_p) *children; | |
8b93c638 | 131 | |
72330bd6 AC |
132 | /* Description of the root variable. Points to root variable for children. */ |
133 | struct varobj_root *root; | |
8b93c638 | 134 | |
72330bd6 AC |
135 | /* The format of the output for this object */ |
136 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
137 | |
138 | /* Was this variable updated via a varobj_set_value operation */ | |
139 | int updated; | |
85265413 NR |
140 | |
141 | /* Last print value. */ | |
142 | char *print_value; | |
25d5ea92 VP |
143 | |
144 | /* Is this variable frozen. Frozen variables are never implicitly | |
145 | updated by -var-update * | |
146 | or -var-update <direct-or-indirect-parent>. */ | |
147 | int frozen; | |
148 | ||
149 | /* Is the value of this variable intentionally not fetched? It is | |
150 | not fetched if either the variable is frozen, or any parents is | |
151 | frozen. */ | |
152 | int not_fetched; | |
72330bd6 | 153 | }; |
8b93c638 | 154 | |
8b93c638 | 155 | struct cpstack |
72330bd6 AC |
156 | { |
157 | char *name; | |
158 | struct cpstack *next; | |
159 | }; | |
8b93c638 JM |
160 | |
161 | /* A list of varobjs */ | |
162 | ||
163 | struct vlist | |
72330bd6 AC |
164 | { |
165 | struct varobj *var; | |
166 | struct vlist *next; | |
167 | }; | |
8b93c638 JM |
168 | |
169 | /* Private function prototypes */ | |
170 | ||
171 | /* Helper functions for the above subcommands. */ | |
172 | ||
a14ed312 | 173 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 174 | |
a14ed312 KB |
175 | static void delete_variable_1 (struct cpstack **, int *, |
176 | struct varobj *, int, int); | |
8b93c638 | 177 | |
a14ed312 | 178 | static int install_variable (struct varobj *); |
8b93c638 | 179 | |
a14ed312 | 180 | static void uninstall_variable (struct varobj *); |
8b93c638 | 181 | |
a14ed312 | 182 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 183 | |
8b93c638 JM |
184 | /* Utility routines */ |
185 | ||
a14ed312 | 186 | static struct varobj *new_variable (void); |
8b93c638 | 187 | |
a14ed312 | 188 | static struct varobj *new_root_variable (void); |
8b93c638 | 189 | |
a14ed312 | 190 | static void free_variable (struct varobj *var); |
8b93c638 | 191 | |
74b7792f AC |
192 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
193 | ||
a14ed312 | 194 | static struct type *get_type (struct varobj *var); |
8b93c638 | 195 | |
6e2a9270 VP |
196 | static struct type *get_value_type (struct varobj *var); |
197 | ||
a14ed312 | 198 | static struct type *get_target_type (struct type *); |
8b93c638 | 199 | |
a14ed312 | 200 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 201 | |
a14ed312 | 202 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 203 | |
a14ed312 | 204 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 205 | |
acd65feb VP |
206 | static int install_new_value (struct varobj *var, struct value *value, |
207 | int initial); | |
208 | ||
8b93c638 JM |
209 | /* Language-specific routines. */ |
210 | ||
a14ed312 | 211 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 212 | |
a14ed312 | 213 | static int number_of_children (struct varobj *); |
8b93c638 | 214 | |
a14ed312 | 215 | static char *name_of_variable (struct varobj *); |
8b93c638 | 216 | |
a14ed312 | 217 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 218 | |
30b28db1 | 219 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 220 | |
30b28db1 | 221 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 222 | |
a14ed312 | 223 | static char *my_value_of_variable (struct varobj *var); |
8b93c638 | 224 | |
85265413 NR |
225 | static char *value_get_print_value (struct value *value, |
226 | enum varobj_display_formats format); | |
227 | ||
b2c2bd75 VP |
228 | static int varobj_value_is_changeable_p (struct varobj *var); |
229 | ||
230 | static int is_root_p (struct varobj *var); | |
8b93c638 JM |
231 | |
232 | /* C implementation */ | |
233 | ||
a14ed312 | 234 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 235 | |
a14ed312 | 236 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 237 | |
a14ed312 | 238 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 239 | |
02142340 VP |
240 | static char *c_path_expr_of_child (struct varobj *child); |
241 | ||
30b28db1 | 242 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 243 | |
30b28db1 | 244 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 245 | |
a14ed312 | 246 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 247 | |
a14ed312 | 248 | static char *c_value_of_variable (struct varobj *var); |
8b93c638 JM |
249 | |
250 | /* C++ implementation */ | |
251 | ||
a14ed312 | 252 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 253 | |
a14ed312 | 254 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 255 | |
a14ed312 | 256 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 257 | |
a14ed312 | 258 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 259 | |
02142340 VP |
260 | static char *cplus_path_expr_of_child (struct varobj *child); |
261 | ||
30b28db1 | 262 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 263 | |
30b28db1 | 264 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 265 | |
a14ed312 | 266 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 267 | |
a14ed312 | 268 | static char *cplus_value_of_variable (struct varobj *var); |
8b93c638 JM |
269 | |
270 | /* Java implementation */ | |
271 | ||
a14ed312 | 272 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 273 | |
a14ed312 | 274 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 275 | |
a14ed312 | 276 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 277 | |
02142340 VP |
278 | static char *java_path_expr_of_child (struct varobj *child); |
279 | ||
30b28db1 | 280 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 281 | |
30b28db1 | 282 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 283 | |
a14ed312 | 284 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 285 | |
a14ed312 | 286 | static char *java_value_of_variable (struct varobj *var); |
8b93c638 JM |
287 | |
288 | /* The language specific vector */ | |
289 | ||
290 | struct language_specific | |
72330bd6 | 291 | { |
8b93c638 | 292 | |
72330bd6 AC |
293 | /* The language of this variable */ |
294 | enum varobj_languages language; | |
8b93c638 | 295 | |
72330bd6 AC |
296 | /* The number of children of PARENT. */ |
297 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 298 | |
72330bd6 AC |
299 | /* The name (expression) of a root varobj. */ |
300 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 301 | |
72330bd6 AC |
302 | /* The name of the INDEX'th child of PARENT. */ |
303 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 304 | |
02142340 VP |
305 | /* Returns the rooted expression of CHILD, which is a variable |
306 | obtain that has some parent. */ | |
307 | char *(*path_expr_of_child) (struct varobj * child); | |
308 | ||
30b28db1 AC |
309 | /* The ``struct value *'' of the root variable ROOT. */ |
310 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 311 | |
30b28db1 AC |
312 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
313 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 314 | |
72330bd6 AC |
315 | /* The type of the INDEX'th child of PARENT. */ |
316 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 317 | |
72330bd6 AC |
318 | /* The current value of VAR. */ |
319 | char *(*value_of_variable) (struct varobj * var); | |
320 | }; | |
8b93c638 JM |
321 | |
322 | /* Array of known source language routines. */ | |
d5d6fca5 | 323 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
324 | /* Unknown (try treating as C */ |
325 | { | |
72330bd6 AC |
326 | vlang_unknown, |
327 | c_number_of_children, | |
328 | c_name_of_variable, | |
329 | c_name_of_child, | |
02142340 | 330 | c_path_expr_of_child, |
72330bd6 AC |
331 | c_value_of_root, |
332 | c_value_of_child, | |
333 | c_type_of_child, | |
72330bd6 | 334 | c_value_of_variable} |
8b93c638 JM |
335 | , |
336 | /* C */ | |
337 | { | |
72330bd6 AC |
338 | vlang_c, |
339 | c_number_of_children, | |
340 | c_name_of_variable, | |
341 | c_name_of_child, | |
02142340 | 342 | c_path_expr_of_child, |
72330bd6 AC |
343 | c_value_of_root, |
344 | c_value_of_child, | |
345 | c_type_of_child, | |
72330bd6 | 346 | c_value_of_variable} |
8b93c638 JM |
347 | , |
348 | /* C++ */ | |
349 | { | |
72330bd6 AC |
350 | vlang_cplus, |
351 | cplus_number_of_children, | |
352 | cplus_name_of_variable, | |
353 | cplus_name_of_child, | |
02142340 | 354 | cplus_path_expr_of_child, |
72330bd6 AC |
355 | cplus_value_of_root, |
356 | cplus_value_of_child, | |
357 | cplus_type_of_child, | |
72330bd6 | 358 | cplus_value_of_variable} |
8b93c638 JM |
359 | , |
360 | /* Java */ | |
361 | { | |
72330bd6 AC |
362 | vlang_java, |
363 | java_number_of_children, | |
364 | java_name_of_variable, | |
365 | java_name_of_child, | |
02142340 | 366 | java_path_expr_of_child, |
72330bd6 AC |
367 | java_value_of_root, |
368 | java_value_of_child, | |
369 | java_type_of_child, | |
72330bd6 | 370 | java_value_of_variable} |
8b93c638 JM |
371 | }; |
372 | ||
373 | /* A little convenience enum for dealing with C++/Java */ | |
374 | enum vsections | |
72330bd6 AC |
375 | { |
376 | v_public = 0, v_private, v_protected | |
377 | }; | |
8b93c638 JM |
378 | |
379 | /* Private data */ | |
380 | ||
381 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 382 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
383 | |
384 | /* Header of the list of root variable objects */ | |
385 | static struct varobj_root *rootlist; | |
386 | static int rootcount = 0; /* number of root varobjs in the list */ | |
387 | ||
388 | /* Prime number indicating the number of buckets in the hash table */ | |
389 | /* A prime large enough to avoid too many colisions */ | |
390 | #define VAROBJ_TABLE_SIZE 227 | |
391 | ||
392 | /* Pointer to the varobj hash table (built at run time) */ | |
393 | static struct vlist **varobj_table; | |
394 | ||
8b93c638 JM |
395 | /* Is the variable X one of our "fake" children? */ |
396 | #define CPLUS_FAKE_CHILD(x) \ | |
397 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
398 | \f | |
399 | ||
400 | /* API Implementation */ | |
b2c2bd75 VP |
401 | static int |
402 | is_root_p (struct varobj *var) | |
403 | { | |
404 | return (var->root->rootvar == var); | |
405 | } | |
8b93c638 JM |
406 | |
407 | /* Creates a varobj (not its children) */ | |
408 | ||
7d8547c9 AC |
409 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
410 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
411 | ||
412 | static struct frame_info * | |
413 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
414 | { | |
415 | struct frame_info *frame = NULL; | |
416 | ||
417 | if (frame_addr == (CORE_ADDR) 0) | |
418 | return NULL; | |
419 | ||
420 | while (1) | |
421 | { | |
422 | frame = get_prev_frame (frame); | |
423 | if (frame == NULL) | |
424 | return NULL; | |
eb5492fa | 425 | if (get_frame_base_address (frame) == frame_addr) |
7d8547c9 AC |
426 | return frame; |
427 | } | |
428 | } | |
429 | ||
8b93c638 JM |
430 | struct varobj * |
431 | varobj_create (char *objname, | |
72330bd6 | 432 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
433 | { |
434 | struct varobj *var; | |
2c67cb8b AC |
435 | struct frame_info *fi; |
436 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
437 | struct block *block; |
438 | struct cleanup *old_chain; | |
439 | ||
440 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
441 | var = new_root_variable (); | |
74b7792f | 442 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
443 | |
444 | if (expression != NULL) | |
445 | { | |
446 | char *p; | |
447 | enum varobj_languages lang; | |
e55dccf0 | 448 | struct value *value = NULL; |
02142340 | 449 | int expr_len; |
8b93c638 JM |
450 | |
451 | /* Parse and evaluate the expression, filling in as much | |
452 | of the variable's data as possible */ | |
453 | ||
454 | /* Allow creator to specify context of variable */ | |
72330bd6 | 455 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
206415a3 | 456 | fi = deprecated_safe_get_selected_frame (); |
8b93c638 | 457 | else |
7d8547c9 AC |
458 | /* FIXME: cagney/2002-11-23: This code should be doing a |
459 | lookup using the frame ID and not just the frame's | |
460 | ``address''. This, of course, means an interface change. | |
461 | However, with out that interface change ISAs, such as the | |
462 | ia64 with its two stacks, won't work. Similar goes for the | |
463 | case where there is a frameless function. */ | |
8b93c638 JM |
464 | fi = find_frame_addr_in_frame_chain (frame); |
465 | ||
73a93a32 JI |
466 | /* frame = -2 means always use selected frame */ |
467 | if (type == USE_SELECTED_FRAME) | |
468 | var->root->use_selected_frame = 1; | |
469 | ||
8b93c638 JM |
470 | block = NULL; |
471 | if (fi != NULL) | |
ae767bfb | 472 | block = get_frame_block (fi, 0); |
8b93c638 JM |
473 | |
474 | p = expression; | |
475 | innermost_block = NULL; | |
73a93a32 JI |
476 | /* Wrap the call to parse expression, so we can |
477 | return a sensible error. */ | |
478 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
479 | { | |
480 | return NULL; | |
481 | } | |
8b93c638 JM |
482 | |
483 | /* Don't allow variables to be created for types. */ | |
484 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
485 | { | |
486 | do_cleanups (old_chain); | |
bc8332bb AC |
487 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
488 | " as an expression.\n"); | |
8b93c638 JM |
489 | return NULL; |
490 | } | |
491 | ||
492 | var->format = variable_default_display (var); | |
493 | var->root->valid_block = innermost_block; | |
02142340 VP |
494 | expr_len = strlen (expression); |
495 | var->name = savestring (expression, expr_len); | |
496 | /* For a root var, the name and the expr are the same. */ | |
497 | var->path_expr = savestring (expression, expr_len); | |
8b93c638 JM |
498 | |
499 | /* When the frame is different from the current frame, | |
500 | we must select the appropriate frame before parsing | |
501 | the expression, otherwise the value will not be current. | |
502 | Since select_frame is so benign, just call it for all cases. */ | |
44a67aa7 | 503 | if (innermost_block && fi != NULL) |
8b93c638 | 504 | { |
7a424e99 | 505 | var->root->frame = get_frame_id (fi); |
206415a3 | 506 | old_fi = get_selected_frame (NULL); |
0f7d239c | 507 | select_frame (fi); |
8b93c638 JM |
508 | } |
509 | ||
340a7723 | 510 | /* We definitely need to catch errors here. |
8b93c638 JM |
511 | If evaluate_expression succeeds we got the value we wanted. |
512 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb | 513 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
e55dccf0 VP |
514 | { |
515 | /* Error getting the value. Try to at least get the | |
516 | right type. */ | |
517 | struct value *type_only_value = evaluate_type (var->root->exp); | |
518 | var->type = value_type (type_only_value); | |
519 | } | |
520 | else | |
521 | var->type = value_type (value); | |
acd65feb | 522 | |
acd65feb | 523 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
524 | |
525 | /* Set language info */ | |
526 | lang = variable_language (var); | |
d5d6fca5 | 527 | var->root->lang = &languages[lang]; |
8b93c638 JM |
528 | |
529 | /* Set ourselves as our root */ | |
530 | var->root->rootvar = var; | |
531 | ||
532 | /* Reset the selected frame */ | |
533 | if (fi != NULL) | |
0f7d239c | 534 | select_frame (old_fi); |
8b93c638 JM |
535 | } |
536 | ||
73a93a32 JI |
537 | /* If the variable object name is null, that means this |
538 | is a temporary variable, so don't install it. */ | |
539 | ||
540 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 JM |
541 | { |
542 | var->obj_name = savestring (objname, strlen (objname)); | |
543 | ||
544 | /* If a varobj name is duplicated, the install will fail so | |
545 | we must clenup */ | |
546 | if (!install_variable (var)) | |
547 | { | |
548 | do_cleanups (old_chain); | |
549 | return NULL; | |
550 | } | |
551 | } | |
552 | ||
553 | discard_cleanups (old_chain); | |
554 | return var; | |
555 | } | |
556 | ||
557 | /* Generates an unique name that can be used for a varobj */ | |
558 | ||
559 | char * | |
560 | varobj_gen_name (void) | |
561 | { | |
562 | static int id = 0; | |
e64d9b3d | 563 | char *obj_name; |
8b93c638 JM |
564 | |
565 | /* generate a name for this object */ | |
566 | id++; | |
b435e160 | 567 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 568 | |
e64d9b3d | 569 | return obj_name; |
8b93c638 JM |
570 | } |
571 | ||
572 | /* Given an "objname", returns the pointer to the corresponding varobj | |
573 | or NULL if not found */ | |
574 | ||
575 | struct varobj * | |
576 | varobj_get_handle (char *objname) | |
577 | { | |
578 | struct vlist *cv; | |
579 | const char *chp; | |
580 | unsigned int index = 0; | |
581 | unsigned int i = 1; | |
582 | ||
583 | for (chp = objname; *chp; chp++) | |
584 | { | |
585 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
586 | } | |
587 | ||
588 | cv = *(varobj_table + index); | |
589 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
590 | cv = cv->next; | |
591 | ||
592 | if (cv == NULL) | |
8a3fe4f8 | 593 | error (_("Variable object not found")); |
8b93c638 JM |
594 | |
595 | return cv->var; | |
596 | } | |
597 | ||
598 | /* Given the handle, return the name of the object */ | |
599 | ||
600 | char * | |
601 | varobj_get_objname (struct varobj *var) | |
602 | { | |
603 | return var->obj_name; | |
604 | } | |
605 | ||
606 | /* Given the handle, return the expression represented by the object */ | |
607 | ||
608 | char * | |
609 | varobj_get_expression (struct varobj *var) | |
610 | { | |
611 | return name_of_variable (var); | |
612 | } | |
613 | ||
614 | /* Deletes a varobj and all its children if only_children == 0, | |
615 | otherwise deletes only the children; returns a malloc'ed list of all the | |
616 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
617 | ||
618 | int | |
619 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
620 | { | |
621 | int delcount; | |
622 | int mycount; | |
623 | struct cpstack *result = NULL; | |
624 | char **cp; | |
625 | ||
626 | /* Initialize a stack for temporary results */ | |
627 | cppush (&result, NULL); | |
628 | ||
629 | if (only_children) | |
630 | /* Delete only the variable children */ | |
631 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
632 | else | |
633 | /* Delete the variable and all its children */ | |
634 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
635 | ||
636 | /* We may have been asked to return a list of what has been deleted */ | |
637 | if (dellist != NULL) | |
638 | { | |
639 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
640 | ||
641 | cp = *dellist; | |
642 | mycount = delcount; | |
643 | *cp = cppop (&result); | |
644 | while ((*cp != NULL) && (mycount > 0)) | |
645 | { | |
646 | mycount--; | |
647 | cp++; | |
648 | *cp = cppop (&result); | |
649 | } | |
650 | ||
651 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 652 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 653 | mycount); |
8b93c638 JM |
654 | } |
655 | ||
656 | return delcount; | |
657 | } | |
658 | ||
659 | /* Set/Get variable object display format */ | |
660 | ||
661 | enum varobj_display_formats | |
662 | varobj_set_display_format (struct varobj *var, | |
663 | enum varobj_display_formats format) | |
664 | { | |
665 | switch (format) | |
666 | { | |
667 | case FORMAT_NATURAL: | |
668 | case FORMAT_BINARY: | |
669 | case FORMAT_DECIMAL: | |
670 | case FORMAT_HEXADECIMAL: | |
671 | case FORMAT_OCTAL: | |
672 | var->format = format; | |
673 | break; | |
674 | ||
675 | default: | |
676 | var->format = variable_default_display (var); | |
677 | } | |
678 | ||
ae7d22a6 VP |
679 | if (varobj_value_is_changeable_p (var) |
680 | && var->value && !value_lazy (var->value)) | |
681 | { | |
682 | free (var->print_value); | |
683 | var->print_value = value_get_print_value (var->value, var->format); | |
684 | } | |
685 | ||
8b93c638 JM |
686 | return var->format; |
687 | } | |
688 | ||
689 | enum varobj_display_formats | |
690 | varobj_get_display_format (struct varobj *var) | |
691 | { | |
692 | return var->format; | |
693 | } | |
694 | ||
25d5ea92 VP |
695 | void |
696 | varobj_set_frozen (struct varobj *var, int frozen) | |
697 | { | |
698 | /* When a variable is unfrozen, we don't fetch its value. | |
699 | The 'not_fetched' flag remains set, so next -var-update | |
700 | won't complain. | |
701 | ||
702 | We don't fetch the value, because for structures the client | |
703 | should do -var-update anyway. It would be bad to have different | |
704 | client-size logic for structure and other types. */ | |
705 | var->frozen = frozen; | |
706 | } | |
707 | ||
708 | int | |
709 | varobj_get_frozen (struct varobj *var) | |
710 | { | |
711 | return var->frozen; | |
712 | } | |
713 | ||
714 | ||
8b93c638 JM |
715 | int |
716 | varobj_get_num_children (struct varobj *var) | |
717 | { | |
718 | if (var->num_children == -1) | |
719 | var->num_children = number_of_children (var); | |
720 | ||
721 | return var->num_children; | |
722 | } | |
723 | ||
724 | /* Creates a list of the immediate children of a variable object; | |
725 | the return code is the number of such children or -1 on error */ | |
726 | ||
d56d46f5 VP |
727 | VEC (varobj_p)* |
728 | varobj_list_children (struct varobj *var) | |
8b93c638 JM |
729 | { |
730 | struct varobj *child; | |
731 | char *name; | |
732 | int i; | |
733 | ||
8b93c638 JM |
734 | if (var->num_children == -1) |
735 | var->num_children = number_of_children (var); | |
736 | ||
74a44383 DJ |
737 | /* If that failed, give up. */ |
738 | if (var->num_children == -1) | |
d56d46f5 | 739 | return var->children; |
74a44383 | 740 | |
28335dcc VP |
741 | /* If we're called when the list of children is not yet initialized, |
742 | allocate enough elements in it. */ | |
743 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
744 | VEC_safe_push (varobj_p, var->children, NULL); | |
745 | ||
8b93c638 JM |
746 | for (i = 0; i < var->num_children; i++) |
747 | { | |
d56d46f5 | 748 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
749 | |
750 | if (existing == NULL) | |
751 | { | |
752 | /* Either it's the first call to varobj_list_children for | |
753 | this variable object, and the child was never created, | |
754 | or it was explicitly deleted by the client. */ | |
755 | name = name_of_child (var, i); | |
756 | existing = create_child (var, i, name); | |
757 | VEC_replace (varobj_p, var->children, i, existing); | |
758 | } | |
8b93c638 JM |
759 | } |
760 | ||
d56d46f5 | 761 | return var->children; |
8b93c638 JM |
762 | } |
763 | ||
764 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
765 | prints on the console */ | |
766 | ||
767 | char * | |
768 | varobj_get_type (struct varobj *var) | |
769 | { | |
30b28db1 | 770 | struct value *val; |
8b93c638 JM |
771 | struct cleanup *old_chain; |
772 | struct ui_file *stb; | |
773 | char *thetype; | |
774 | long length; | |
775 | ||
776 | /* For the "fake" variables, do not return a type. (It's type is | |
8756216b DP |
777 | NULL, too.) |
778 | Do not return a type for invalid variables as well. */ | |
779 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
780 | return NULL; |
781 | ||
782 | stb = mem_fileopen (); | |
783 | old_chain = make_cleanup_ui_file_delete (stb); | |
784 | ||
30b28db1 | 785 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
786 | cast it to our type. We then typeprint this variable. */ |
787 | val = value_zero (var->type, not_lval); | |
df407dfe | 788 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
789 | |
790 | thetype = ui_file_xstrdup (stb, &length); | |
791 | do_cleanups (old_chain); | |
792 | return thetype; | |
793 | } | |
794 | ||
1ecb4ee0 DJ |
795 | /* Obtain the type of an object variable. */ |
796 | ||
797 | struct type * | |
798 | varobj_get_gdb_type (struct varobj *var) | |
799 | { | |
800 | return var->type; | |
801 | } | |
802 | ||
02142340 VP |
803 | /* Return a pointer to the full rooted expression of varobj VAR. |
804 | If it has not been computed yet, compute it. */ | |
805 | char * | |
806 | varobj_get_path_expr (struct varobj *var) | |
807 | { | |
808 | if (var->path_expr != NULL) | |
809 | return var->path_expr; | |
810 | else | |
811 | { | |
812 | /* For root varobjs, we initialize path_expr | |
813 | when creating varobj, so here it should be | |
814 | child varobj. */ | |
815 | gdb_assert (!is_root_p (var)); | |
816 | return (*var->root->lang->path_expr_of_child) (var); | |
817 | } | |
818 | } | |
819 | ||
8b93c638 JM |
820 | enum varobj_languages |
821 | varobj_get_language (struct varobj *var) | |
822 | { | |
823 | return variable_language (var); | |
824 | } | |
825 | ||
826 | int | |
827 | varobj_get_attributes (struct varobj *var) | |
828 | { | |
829 | int attributes = 0; | |
830 | ||
340a7723 | 831 | if (varobj_editable_p (var)) |
8b93c638 JM |
832 | /* FIXME: define masks for attributes */ |
833 | attributes |= 0x00000001; /* Editable */ | |
834 | ||
835 | return attributes; | |
836 | } | |
837 | ||
838 | char * | |
839 | varobj_get_value (struct varobj *var) | |
840 | { | |
841 | return my_value_of_variable (var); | |
842 | } | |
843 | ||
844 | /* Set the value of an object variable (if it is editable) to the | |
845 | value of the given expression */ | |
846 | /* Note: Invokes functions that can call error() */ | |
847 | ||
848 | int | |
849 | varobj_set_value (struct varobj *var, char *expression) | |
850 | { | |
30b28db1 | 851 | struct value *val; |
8b93c638 | 852 | int offset = 0; |
a6c442d8 | 853 | int error = 0; |
8b93c638 JM |
854 | |
855 | /* The argument "expression" contains the variable's new value. | |
856 | We need to first construct a legal expression for this -- ugh! */ | |
857 | /* Does this cover all the bases? */ | |
858 | struct expression *exp; | |
30b28db1 | 859 | struct value *value; |
8b93c638 | 860 | int saved_input_radix = input_radix; |
340a7723 NR |
861 | char *s = expression; |
862 | int i; | |
8b93c638 | 863 | |
340a7723 | 864 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 865 | |
340a7723 NR |
866 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ |
867 | exp = parse_exp_1 (&s, 0, 0); | |
868 | if (!gdb_evaluate_expression (exp, &value)) | |
869 | { | |
870 | /* We cannot proceed without a valid expression. */ | |
871 | xfree (exp); | |
872 | return 0; | |
8b93c638 JM |
873 | } |
874 | ||
340a7723 NR |
875 | /* All types that are editable must also be changeable. */ |
876 | gdb_assert (varobj_value_is_changeable_p (var)); | |
877 | ||
878 | /* The value of a changeable variable object must not be lazy. */ | |
879 | gdb_assert (!value_lazy (var->value)); | |
880 | ||
881 | /* Need to coerce the input. We want to check if the | |
882 | value of the variable object will be different | |
883 | after assignment, and the first thing value_assign | |
884 | does is coerce the input. | |
885 | For example, if we are assigning an array to a pointer variable we | |
886 | should compare the pointer with the the array's address, not with the | |
887 | array's content. */ | |
888 | value = coerce_array (value); | |
889 | ||
890 | /* The new value may be lazy. gdb_value_assign, or | |
891 | rather value_contents, will take care of this. | |
892 | If fetching of the new value will fail, gdb_value_assign | |
893 | with catch the exception. */ | |
894 | if (!gdb_value_assign (var->value, value, &val)) | |
895 | return 0; | |
896 | ||
897 | /* If the value has changed, record it, so that next -var-update can | |
898 | report this change. If a variable had a value of '1', we've set it | |
899 | to '333' and then set again to '1', when -var-update will report this | |
900 | variable as changed -- because the first assignment has set the | |
901 | 'updated' flag. There's no need to optimize that, because return value | |
902 | of -var-update should be considered an approximation. */ | |
903 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
904 | input_radix = saved_input_radix; | |
905 | return 1; | |
8b93c638 JM |
906 | } |
907 | ||
908 | /* Returns a malloc'ed list with all root variable objects */ | |
909 | int | |
910 | varobj_list (struct varobj ***varlist) | |
911 | { | |
912 | struct varobj **cv; | |
913 | struct varobj_root *croot; | |
914 | int mycount = rootcount; | |
915 | ||
916 | /* Alloc (rootcount + 1) entries for the result */ | |
917 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
918 | ||
919 | cv = *varlist; | |
920 | croot = rootlist; | |
921 | while ((croot != NULL) && (mycount > 0)) | |
922 | { | |
923 | *cv = croot->rootvar; | |
924 | mycount--; | |
925 | cv++; | |
926 | croot = croot->next; | |
927 | } | |
928 | /* Mark the end of the list */ | |
929 | *cv = NULL; | |
930 | ||
931 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
932 | warning |
933 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
934 | rootcount, mycount); | |
8b93c638 JM |
935 | |
936 | return rootcount; | |
937 | } | |
938 | ||
acd65feb VP |
939 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
940 | this is the first assignement after the variable object was just | |
941 | created, or changed type. In that case, just assign the value | |
942 | and return 0. | |
943 | Otherwise, assign the value and if type_changeable returns non-zero, | |
944 | find if the new value is different from the current value. | |
b26ed50d VP |
945 | Return 1 if so, and 0 if the values are equal. |
946 | ||
947 | The VALUE parameter should not be released -- the function will | |
948 | take care of releasing it when needed. */ | |
acd65feb VP |
949 | static int |
950 | install_new_value (struct varobj *var, struct value *value, int initial) | |
951 | { | |
952 | int changeable; | |
953 | int need_to_fetch; | |
954 | int changed = 0; | |
25d5ea92 | 955 | int intentionally_not_fetched = 0; |
7a4d50bf | 956 | char *print_value = NULL; |
acd65feb | 957 | |
acd65feb VP |
958 | /* We need to know the varobj's type to decide if the value should |
959 | be fetched or not. C++ fake children (public/protected/private) don't have | |
960 | a type. */ | |
961 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 962 | changeable = varobj_value_is_changeable_p (var); |
acd65feb VP |
963 | need_to_fetch = changeable; |
964 | ||
b26ed50d VP |
965 | /* We are not interested in the address of references, and given |
966 | that in C++ a reference is not rebindable, it cannot | |
967 | meaningfully change. So, get hold of the real value. */ | |
968 | if (value) | |
969 | { | |
970 | value = coerce_ref (value); | |
971 | release_value (value); | |
972 | } | |
973 | ||
acd65feb VP |
974 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
975 | /* For unions, we need to fetch the value implicitly because | |
976 | of implementation of union member fetch. When gdb | |
977 | creates a value for a field and the value of the enclosing | |
978 | structure is not lazy, it immediately copies the necessary | |
979 | bytes from the enclosing values. If the enclosing value is | |
980 | lazy, the call to value_fetch_lazy on the field will read | |
981 | the data from memory. For unions, that means we'll read the | |
982 | same memory more than once, which is not desirable. So | |
983 | fetch now. */ | |
984 | need_to_fetch = 1; | |
985 | ||
986 | /* The new value might be lazy. If the type is changeable, | |
987 | that is we'll be comparing values of this type, fetch the | |
988 | value now. Otherwise, on the next update the old value | |
989 | will be lazy, which means we've lost that old value. */ | |
990 | if (need_to_fetch && value && value_lazy (value)) | |
991 | { | |
25d5ea92 VP |
992 | struct varobj *parent = var->parent; |
993 | int frozen = var->frozen; | |
994 | for (; !frozen && parent; parent = parent->parent) | |
995 | frozen |= parent->frozen; | |
996 | ||
997 | if (frozen && initial) | |
998 | { | |
999 | /* For variables that are frozen, or are children of frozen | |
1000 | variables, we don't do fetch on initial assignment. | |
1001 | For non-initial assignemnt we do the fetch, since it means we're | |
1002 | explicitly asked to compare the new value with the old one. */ | |
1003 | intentionally_not_fetched = 1; | |
1004 | } | |
1005 | else if (!gdb_value_fetch_lazy (value)) | |
acd65feb | 1006 | { |
acd65feb VP |
1007 | /* Set the value to NULL, so that for the next -var-update, |
1008 | we don't try to compare the new value with this value, | |
1009 | that we couldn't even read. */ | |
1010 | value = NULL; | |
1011 | } | |
acd65feb VP |
1012 | } |
1013 | ||
7a4d50bf VP |
1014 | /* Below, we'll be comparing string rendering of old and new |
1015 | values. Don't get string rendering if the value is | |
1016 | lazy -- if it is, the code above has decided that the value | |
1017 | should not be fetched. */ | |
1018 | if (value && !value_lazy (value)) | |
1019 | print_value = value_get_print_value (value, var->format); | |
1020 | ||
acd65feb VP |
1021 | /* If the type is changeable, compare the old and the new values. |
1022 | If this is the initial assignment, we don't have any old value | |
1023 | to compare with. */ | |
7a4d50bf | 1024 | if (!initial && changeable) |
acd65feb VP |
1025 | { |
1026 | /* If the value of the varobj was changed by -var-set-value, then the | |
1027 | value in the varobj and in the target is the same. However, that value | |
1028 | is different from the value that the varobj had after the previous | |
57e66780 | 1029 | -var-update. So need to the varobj as changed. */ |
acd65feb | 1030 | if (var->updated) |
57e66780 | 1031 | { |
57e66780 DJ |
1032 | changed = 1; |
1033 | } | |
acd65feb VP |
1034 | else |
1035 | { | |
1036 | /* Try to compare the values. That requires that both | |
1037 | values are non-lazy. */ | |
25d5ea92 VP |
1038 | if (var->not_fetched && value_lazy (var->value)) |
1039 | { | |
1040 | /* This is a frozen varobj and the value was never read. | |
1041 | Presumably, UI shows some "never read" indicator. | |
1042 | Now that we've fetched the real value, we need to report | |
1043 | this varobj as changed so that UI can show the real | |
1044 | value. */ | |
1045 | changed = 1; | |
1046 | } | |
1047 | else if (var->value == NULL && value == NULL) | |
acd65feb VP |
1048 | /* Equal. */ |
1049 | ; | |
1050 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1051 | { |
57e66780 DJ |
1052 | changed = 1; |
1053 | } | |
acd65feb VP |
1054 | else |
1055 | { | |
1056 | gdb_assert (!value_lazy (var->value)); | |
1057 | gdb_assert (!value_lazy (value)); | |
85265413 | 1058 | |
57e66780 | 1059 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1060 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1061 | changed = 1; |
acd65feb VP |
1062 | } |
1063 | } | |
1064 | } | |
85265413 | 1065 | |
acd65feb | 1066 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1067 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1068 | value_free (var->value); |
1069 | var->value = value; | |
7a4d50bf VP |
1070 | if (var->print_value) |
1071 | xfree (var->print_value); | |
1072 | var->print_value = print_value; | |
25d5ea92 VP |
1073 | if (value && value_lazy (value) && intentionally_not_fetched) |
1074 | var->not_fetched = 1; | |
1075 | else | |
1076 | var->not_fetched = 0; | |
acd65feb | 1077 | var->updated = 0; |
85265413 | 1078 | |
b26ed50d | 1079 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1080 | |
1081 | return changed; | |
1082 | } | |
acd65feb | 1083 | |
8b93c638 JM |
1084 | /* Update the values for a variable and its children. This is a |
1085 | two-pronged attack. First, re-parse the value for the root's | |
1086 | expression to see if it's changed. Then go all the way | |
1087 | through its children, reconstructing them and noting if they've | |
1088 | changed. | |
8756216b DP |
1089 | Return value: |
1090 | < 0 for error values, see varobj.h. | |
1091 | Otherwise it is the number of children + parent changed. | |
8b93c638 | 1092 | |
25d5ea92 VP |
1093 | The EXPLICIT parameter specifies if this call is result |
1094 | of MI request to update this specific variable, or | |
1095 | result of implicit -var-update *. For implicit request, we don't | |
1096 | update frozen variables. | |
705da579 KS |
1097 | |
1098 | NOTE: This function may delete the caller's varobj. If it | |
8756216b DP |
1099 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1100 | to point to the new varobj. */ | |
8b93c638 JM |
1101 | |
1102 | int | |
25d5ea92 VP |
1103 | varobj_update (struct varobj **varp, struct varobj ***changelist, |
1104 | int explicit) | |
8b93c638 JM |
1105 | { |
1106 | int changed = 0; | |
25d5ea92 | 1107 | int type_changed = 0; |
8b93c638 JM |
1108 | int i; |
1109 | int vleft; | |
8b93c638 JM |
1110 | struct varobj *v; |
1111 | struct varobj **cv; | |
2c67cb8b | 1112 | struct varobj **templist = NULL; |
30b28db1 | 1113 | struct value *new; |
28335dcc VP |
1114 | VEC (varobj_p) *stack = NULL; |
1115 | VEC (varobj_p) *result = NULL; | |
e64d9b3d | 1116 | struct frame_info *fi; |
8b93c638 | 1117 | |
8756216b | 1118 | /* sanity check: have we been passed a pointer? */ |
a1f42e84 | 1119 | gdb_assert (changelist); |
8b93c638 | 1120 | |
25d5ea92 VP |
1121 | /* Frozen means frozen -- we don't check for any change in |
1122 | this varobj, including its going out of scope, or | |
1123 | changing type. One use case for frozen varobjs is | |
1124 | retaining previously evaluated expressions, and we don't | |
1125 | want them to be reevaluated at all. */ | |
1126 | if (!explicit && (*varp)->frozen) | |
1127 | return 0; | |
8756216b DP |
1128 | |
1129 | if (!(*varp)->root->is_valid) | |
1130 | return INVALID; | |
8b93c638 | 1131 | |
25d5ea92 | 1132 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1133 | { |
25d5ea92 VP |
1134 | /* Update the root variable. value_of_root can return NULL |
1135 | if the variable is no longer around, i.e. we stepped out of | |
1136 | the frame in which a local existed. We are letting the | |
1137 | value_of_root variable dispose of the varobj if the type | |
1138 | has changed. */ | |
1139 | type_changed = 1; | |
1140 | new = value_of_root (varp, &type_changed); | |
25d5ea92 VP |
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; | |
6208b47d VP |
2148 | struct cleanup *back_to; |
2149 | ||
73a93a32 | 2150 | /* Only root variables can be updated... */ |
b2c2bd75 | 2151 | if (!is_root_p (var)) |
73a93a32 JI |
2152 | /* Not a root var */ |
2153 | return NULL; | |
2154 | ||
6208b47d VP |
2155 | back_to = make_cleanup_restore_current_thread ( |
2156 | inferior_ptid, get_frame_id (deprecated_safe_get_selected_frame ())); | |
72330bd6 | 2157 | |
8b93c638 | 2158 | /* Determine whether the variable is still around. */ |
b20d8971 | 2159 | if (var->root->valid_block == NULL || var->root->use_selected_frame) |
8b93c638 JM |
2160 | within_scope = 1; |
2161 | else | |
2162 | { | |
e64d9b3d | 2163 | fi = frame_find_by_id (var->root->frame); |
8b93c638 JM |
2164 | within_scope = fi != NULL; |
2165 | /* FIXME: select_frame could fail */ | |
d2353924 NR |
2166 | if (fi) |
2167 | { | |
2168 | CORE_ADDR pc = get_frame_pc (fi); | |
2169 | if (pc < BLOCK_START (var->root->valid_block) || | |
2170 | pc >= BLOCK_END (var->root->valid_block)) | |
2171 | within_scope = 0; | |
2d43bda2 NR |
2172 | else |
2173 | select_frame (fi); | |
d2353924 | 2174 | } |
8b93c638 | 2175 | } |
72330bd6 | 2176 | |
8b93c638 JM |
2177 | if (within_scope) |
2178 | { | |
73a93a32 | 2179 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
2180 | expression fails we want to just return NULL. */ |
2181 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
2182 | return new_val; |
2183 | } | |
2184 | ||
6208b47d VP |
2185 | do_cleanups (back_to); |
2186 | ||
8b93c638 JM |
2187 | return NULL; |
2188 | } | |
2189 | ||
30b28db1 | 2190 | static struct value * |
fba45db2 | 2191 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2192 | { |
bbec2603 | 2193 | struct value *value = NULL; |
02142340 | 2194 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2195 | |
2196 | return value; | |
2197 | } | |
2198 | ||
2199 | static struct type * | |
fba45db2 | 2200 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2201 | { |
bbec2603 | 2202 | struct type *type = NULL; |
02142340 | 2203 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2204 | return type; |
2205 | } | |
2206 | ||
8b93c638 | 2207 | static char * |
fba45db2 | 2208 | c_value_of_variable (struct varobj *var) |
8b93c638 | 2209 | { |
14b3d9c9 JB |
2210 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2211 | it will print out its children instead of "{...}". So we need to | |
2212 | catch that case explicitly. */ | |
2213 | struct type *type = get_type (var); | |
e64d9b3d | 2214 | |
14b3d9c9 JB |
2215 | /* Strip top-level references. */ |
2216 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2217 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2218 | ||
2219 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2220 | { |
2221 | case TYPE_CODE_STRUCT: | |
2222 | case TYPE_CODE_UNION: | |
2223 | return xstrdup ("{...}"); | |
2224 | /* break; */ | |
2225 | ||
2226 | case TYPE_CODE_ARRAY: | |
2227 | { | |
e64d9b3d | 2228 | char *number; |
b435e160 | 2229 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2230 | return (number); |
8b93c638 JM |
2231 | } |
2232 | /* break; */ | |
2233 | ||
2234 | default: | |
2235 | { | |
575bbeb6 KS |
2236 | if (var->value == NULL) |
2237 | { | |
2238 | /* This can happen if we attempt to get the value of a struct | |
2239 | member when the parent is an invalid pointer. This is an | |
2240 | error condition, so we should tell the caller. */ | |
2241 | return NULL; | |
2242 | } | |
2243 | else | |
2244 | { | |
25d5ea92 VP |
2245 | if (var->not_fetched && value_lazy (var->value)) |
2246 | /* Frozen variable and no value yet. We don't | |
2247 | implicitly fetch the value. MI response will | |
2248 | use empty string for the value, which is OK. */ | |
2249 | return NULL; | |
2250 | ||
b2c2bd75 | 2251 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2252 | gdb_assert (!value_lazy (var->value)); |
c39c8256 | 2253 | return xstrdup (var->print_value); |
85265413 | 2254 | } |
e64d9b3d | 2255 | } |
8b93c638 JM |
2256 | } |
2257 | } | |
2258 | \f | |
2259 | ||
2260 | /* C++ */ | |
2261 | ||
2262 | static int | |
fba45db2 | 2263 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2264 | { |
2265 | struct type *type; | |
2266 | int children, dont_know; | |
2267 | ||
2268 | dont_know = 1; | |
2269 | children = 0; | |
2270 | ||
2271 | if (!CPLUS_FAKE_CHILD (var)) | |
2272 | { | |
2024f65a | 2273 | type = get_value_type (var); |
02142340 | 2274 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2275 | |
2276 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2277 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2278 | { |
2279 | int kids[3]; | |
2280 | ||
2281 | cplus_class_num_children (type, kids); | |
2282 | if (kids[v_public] != 0) | |
2283 | children++; | |
2284 | if (kids[v_private] != 0) | |
2285 | children++; | |
2286 | if (kids[v_protected] != 0) | |
2287 | children++; | |
2288 | ||
2289 | /* Add any baseclasses */ | |
2290 | children += TYPE_N_BASECLASSES (type); | |
2291 | dont_know = 0; | |
2292 | ||
2293 | /* FIXME: save children in var */ | |
2294 | } | |
2295 | } | |
2296 | else | |
2297 | { | |
2298 | int kids[3]; | |
2299 | ||
2024f65a | 2300 | type = get_value_type (var->parent); |
02142340 | 2301 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2302 | |
2303 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2304 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2305 | children = kids[v_public]; |
6e382aa3 | 2306 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2307 | children = kids[v_private]; |
2308 | else | |
2309 | children = kids[v_protected]; | |
2310 | dont_know = 0; | |
2311 | } | |
2312 | ||
2313 | if (dont_know) | |
2314 | children = c_number_of_children (var); | |
2315 | ||
2316 | return children; | |
2317 | } | |
2318 | ||
2319 | /* Compute # of public, private, and protected variables in this class. | |
2320 | That means we need to descend into all baseclasses and find out | |
2321 | how many are there, too. */ | |
2322 | static void | |
1669605f | 2323 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2324 | { |
2325 | int i; | |
2326 | ||
2327 | children[v_public] = 0; | |
2328 | children[v_private] = 0; | |
2329 | children[v_protected] = 0; | |
2330 | ||
2331 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2332 | { | |
2333 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2334 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2335 | continue; |
2336 | ||
2337 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2338 | children[v_protected]++; | |
2339 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2340 | children[v_private]++; | |
2341 | else | |
2342 | children[v_public]++; | |
2343 | } | |
2344 | } | |
2345 | ||
2346 | static char * | |
fba45db2 | 2347 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2348 | { |
2349 | return c_name_of_variable (parent); | |
2350 | } | |
2351 | ||
2024f65a VP |
2352 | enum accessibility { private_field, protected_field, public_field }; |
2353 | ||
2354 | /* Check if field INDEX of TYPE has the specified accessibility. | |
2355 | Return 0 if so and 1 otherwise. */ | |
2356 | static int | |
2357 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 2358 | { |
2024f65a VP |
2359 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
2360 | return 1; | |
2361 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
2362 | return 1; | |
2363 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
2364 | && !TYPE_FIELD_PROTECTED (type, index)) | |
2365 | return 1; | |
2366 | else | |
2367 | return 0; | |
2368 | } | |
2369 | ||
2370 | static void | |
2371 | cplus_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2372 | char **cname, struct value **cvalue, struct type **ctype, |
2373 | char **cfull_expression) | |
2024f65a | 2374 | { |
348144ba | 2375 | char *name = NULL; |
2024f65a | 2376 | struct value *value; |
8b93c638 | 2377 | struct type *type; |
02142340 VP |
2378 | int was_ptr; |
2379 | char *parent_expression = NULL; | |
8b93c638 | 2380 | |
2024f65a VP |
2381 | if (cname) |
2382 | *cname = NULL; | |
2383 | if (cvalue) | |
2384 | *cvalue = NULL; | |
2385 | if (ctype) | |
2386 | *ctype = NULL; | |
02142340 VP |
2387 | if (cfull_expression) |
2388 | *cfull_expression = NULL; | |
2024f65a | 2389 | |
8b93c638 JM |
2390 | if (CPLUS_FAKE_CHILD (parent)) |
2391 | { | |
2024f65a VP |
2392 | value = parent->parent->value; |
2393 | type = get_value_type (parent->parent); | |
02142340 VP |
2394 | if (cfull_expression) |
2395 | parent_expression = varobj_get_path_expr (parent->parent); | |
8b93c638 JM |
2396 | } |
2397 | else | |
2024f65a VP |
2398 | { |
2399 | value = parent->value; | |
2400 | type = get_value_type (parent); | |
02142340 VP |
2401 | if (cfull_expression) |
2402 | parent_expression = varobj_get_path_expr (parent); | |
2024f65a | 2403 | } |
8b93c638 | 2404 | |
02142340 | 2405 | adjust_value_for_child_access (&value, &type, &was_ptr); |
2024f65a VP |
2406 | |
2407 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
3f4178d6 | 2408 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
8b93c638 | 2409 | { |
02142340 | 2410 | char *join = was_ptr ? "->" : "."; |
8b93c638 JM |
2411 | if (CPLUS_FAKE_CHILD (parent)) |
2412 | { | |
6e382aa3 JJ |
2413 | /* The fields of the class type are ordered as they |
2414 | appear in the class. We are given an index for a | |
2415 | particular access control type ("public","protected", | |
2416 | or "private"). We must skip over fields that don't | |
2417 | have the access control we are looking for to properly | |
2418 | find the indexed field. */ | |
2419 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 2420 | enum accessibility acc = public_field; |
6e382aa3 | 2421 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 2422 | acc = private_field; |
6e382aa3 | 2423 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
2424 | acc = protected_field; |
2425 | ||
2426 | while (index >= 0) | |
6e382aa3 | 2427 | { |
2024f65a VP |
2428 | if (TYPE_VPTR_BASETYPE (type) == type |
2429 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2430 | ; /* ignore vptr */ | |
2431 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
2432 | --index; |
2433 | ++type_index; | |
6e382aa3 | 2434 | } |
2024f65a VP |
2435 | --type_index; |
2436 | ||
2437 | if (cname) | |
2438 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
2439 | ||
2440 | if (cvalue && value) | |
2441 | *cvalue = value_struct_element_index (value, type_index); | |
2442 | ||
2443 | if (ctype) | |
2444 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
02142340 VP |
2445 | |
2446 | if (cfull_expression) | |
2447 | *cfull_expression = xstrprintf ("((%s)%s%s)", parent_expression, | |
2448 | join, | |
2449 | TYPE_FIELD_NAME (type, type_index)); | |
2024f65a VP |
2450 | } |
2451 | else if (index < TYPE_N_BASECLASSES (type)) | |
2452 | { | |
2453 | /* This is a baseclass. */ | |
2454 | if (cname) | |
2455 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
2456 | ||
2457 | if (cvalue && value) | |
6e382aa3 | 2458 | { |
2024f65a | 2459 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
02142340 | 2460 | release_value (*cvalue); |
6e382aa3 JJ |
2461 | } |
2462 | ||
2024f65a VP |
2463 | if (ctype) |
2464 | { | |
2465 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2466 | } | |
02142340 VP |
2467 | |
2468 | if (cfull_expression) | |
2469 | { | |
2470 | char *ptr = was_ptr ? "*" : ""; | |
2471 | /* Cast the parent to the base' type. Note that in gdb, | |
2472 | expression like | |
2473 | (Base1)d | |
2474 | will create an lvalue, for all appearences, so we don't | |
2475 | need to use more fancy: | |
2476 | *(Base1*)(&d) | |
2477 | construct. */ | |
2478 | *cfull_expression = xstrprintf ("(%s(%s%s) %s)", | |
2479 | ptr, | |
2480 | TYPE_FIELD_NAME (type, index), | |
2481 | ptr, | |
2482 | parent_expression); | |
2483 | } | |
8b93c638 | 2484 | } |
8b93c638 JM |
2485 | else |
2486 | { | |
348144ba | 2487 | char *access = NULL; |
6e382aa3 | 2488 | int children[3]; |
2024f65a | 2489 | cplus_class_num_children (type, children); |
6e382aa3 | 2490 | |
8b93c638 | 2491 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2492 | only be "public", "private", or "protected" |
2493 | ||
2494 | The special "fake" children are always output by varobj in | |
2495 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2496 | index -= TYPE_N_BASECLASSES (type); |
2497 | switch (index) | |
2498 | { | |
2499 | case 0: | |
6e382aa3 | 2500 | if (children[v_public] > 0) |
2024f65a | 2501 | access = "public"; |
6e382aa3 | 2502 | else if (children[v_private] > 0) |
2024f65a | 2503 | access = "private"; |
6e382aa3 | 2504 | else |
2024f65a | 2505 | access = "protected"; |
6e382aa3 | 2506 | break; |
8b93c638 | 2507 | case 1: |
6e382aa3 | 2508 | if (children[v_public] > 0) |
8b93c638 | 2509 | { |
6e382aa3 | 2510 | if (children[v_private] > 0) |
2024f65a | 2511 | access = "private"; |
6e382aa3 | 2512 | else |
2024f65a | 2513 | access = "protected"; |
8b93c638 | 2514 | } |
6e382aa3 | 2515 | else if (children[v_private] > 0) |
2024f65a | 2516 | access = "protected"; |
6e382aa3 | 2517 | break; |
8b93c638 | 2518 | case 2: |
6e382aa3 | 2519 | /* Must be protected */ |
2024f65a | 2520 | access = "protected"; |
6e382aa3 | 2521 | break; |
8b93c638 JM |
2522 | default: |
2523 | /* error! */ | |
2524 | break; | |
2525 | } | |
348144ba MS |
2526 | |
2527 | gdb_assert (access); | |
2024f65a VP |
2528 | if (cname) |
2529 | *cname = xstrdup (access); | |
8b93c638 | 2530 | |
02142340 | 2531 | /* Value and type and full expression are null here. */ |
2024f65a | 2532 | } |
8b93c638 | 2533 | } |
8b93c638 JM |
2534 | else |
2535 | { | |
02142340 | 2536 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
2024f65a VP |
2537 | } |
2538 | } | |
8b93c638 | 2539 | |
2024f65a VP |
2540 | static char * |
2541 | cplus_name_of_child (struct varobj *parent, int index) | |
2542 | { | |
2543 | char *name = NULL; | |
02142340 | 2544 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2545 | return name; |
2546 | } | |
2547 | ||
02142340 VP |
2548 | static char * |
2549 | cplus_path_expr_of_child (struct varobj *child) | |
2550 | { | |
2551 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2552 | &child->path_expr); | |
2553 | return child->path_expr; | |
2554 | } | |
2555 | ||
30b28db1 | 2556 | static struct value * |
fba45db2 | 2557 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2558 | { |
73a93a32 | 2559 | return c_value_of_root (var_handle); |
8b93c638 JM |
2560 | } |
2561 | ||
30b28db1 | 2562 | static struct value * |
fba45db2 | 2563 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2564 | { |
2024f65a | 2565 | struct value *value = NULL; |
02142340 | 2566 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2567 | return value; |
2568 | } | |
2569 | ||
2570 | static struct type * | |
fba45db2 | 2571 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2572 | { |
2024f65a | 2573 | struct type *type = NULL; |
02142340 | 2574 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2575 | return type; |
2576 | } | |
2577 | ||
8b93c638 | 2578 | static char * |
fba45db2 | 2579 | cplus_value_of_variable (struct varobj *var) |
8b93c638 JM |
2580 | { |
2581 | ||
2582 | /* If we have one of our special types, don't print out | |
2583 | any value. */ | |
2584 | if (CPLUS_FAKE_CHILD (var)) | |
2585 | return xstrdup (""); | |
2586 | ||
2587 | return c_value_of_variable (var); | |
2588 | } | |
2589 | \f | |
2590 | /* Java */ | |
2591 | ||
2592 | static int | |
fba45db2 | 2593 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2594 | { |
2595 | return cplus_number_of_children (var); | |
2596 | } | |
2597 | ||
2598 | static char * | |
fba45db2 | 2599 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2600 | { |
2601 | char *p, *name; | |
2602 | ||
2603 | name = cplus_name_of_variable (parent); | |
2604 | /* If the name has "-" in it, it is because we | |
2605 | needed to escape periods in the name... */ | |
2606 | p = name; | |
2607 | ||
2608 | while (*p != '\000') | |
2609 | { | |
2610 | if (*p == '-') | |
2611 | *p = '.'; | |
2612 | p++; | |
2613 | } | |
2614 | ||
2615 | return name; | |
2616 | } | |
2617 | ||
2618 | static char * | |
fba45db2 | 2619 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2620 | { |
2621 | char *name, *p; | |
2622 | ||
2623 | name = cplus_name_of_child (parent, index); | |
2624 | /* Escape any periods in the name... */ | |
2625 | p = name; | |
2626 | ||
2627 | while (*p != '\000') | |
2628 | { | |
2629 | if (*p == '.') | |
2630 | *p = '-'; | |
2631 | p++; | |
2632 | } | |
2633 | ||
2634 | return name; | |
2635 | } | |
2636 | ||
02142340 VP |
2637 | static char * |
2638 | java_path_expr_of_child (struct varobj *child) | |
2639 | { | |
2640 | return NULL; | |
2641 | } | |
2642 | ||
30b28db1 | 2643 | static struct value * |
fba45db2 | 2644 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2645 | { |
73a93a32 | 2646 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2647 | } |
2648 | ||
30b28db1 | 2649 | static struct value * |
fba45db2 | 2650 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2651 | { |
2652 | return cplus_value_of_child (parent, index); | |
2653 | } | |
2654 | ||
2655 | static struct type * | |
fba45db2 | 2656 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2657 | { |
2658 | return cplus_type_of_child (parent, index); | |
2659 | } | |
2660 | ||
8b93c638 | 2661 | static char * |
fba45db2 | 2662 | java_value_of_variable (struct varobj *var) |
8b93c638 JM |
2663 | { |
2664 | return cplus_value_of_variable (var); | |
2665 | } | |
2666 | \f | |
2667 | extern void _initialize_varobj (void); | |
2668 | void | |
2669 | _initialize_varobj (void) | |
2670 | { | |
2671 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2672 | ||
2673 | varobj_table = xmalloc (sizeof_table); | |
2674 | memset (varobj_table, 0, sizeof_table); | |
2675 | ||
85c07804 AC |
2676 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2677 | &varobjdebug, _("\ | |
2678 | Set varobj debugging."), _("\ | |
2679 | Show varobj debugging."), _("\ | |
2680 | When non-zero, varobj debugging is enabled."), | |
2681 | NULL, | |
920d2a44 | 2682 | show_varobjdebug, |
85c07804 | 2683 | &setlist, &showlist); |
8b93c638 | 2684 | } |
8756216b DP |
2685 | |
2686 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2687 | are defined on globals. | |
2688 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2689 | void | |
2690 | varobj_invalidate (void) | |
2691 | { | |
2692 | struct varobj **all_rootvarobj; | |
2693 | struct varobj **varp; | |
2694 | ||
2695 | if (varobj_list (&all_rootvarobj) > 0) | |
2696 | { | |
2697 | varp = all_rootvarobj; | |
2698 | while (*varp != NULL) | |
2699 | { | |
2700 | /* global var must be re-evaluated. */ | |
2701 | if ((*varp)->root->valid_block == NULL) | |
2702 | { | |
2703 | struct varobj *tmp_var; | |
2704 | ||
2705 | /* Try to create a varobj with same expression. If we succeed replace | |
2706 | the old varobj, otherwise invalidate it. */ | |
2707 | tmp_var = varobj_create (NULL, (*varp)->name, (CORE_ADDR) 0, USE_CURRENT_FRAME); | |
2708 | if (tmp_var != NULL) | |
2709 | { | |
2710 | tmp_var->obj_name = xstrdup ((*varp)->obj_name); | |
2711 | varobj_delete (*varp, NULL, 0); | |
2712 | install_variable (tmp_var); | |
2713 | } | |
2714 | else | |
2715 | (*varp)->root->is_valid = 0; | |
2716 | } | |
2717 | else /* locals must be invalidated. */ | |
2718 | (*varp)->root->is_valid = 0; | |
2719 | ||
2720 | varp++; | |
2721 | } | |
2722 | xfree (all_rootvarobj); | |
2723 | } | |
2724 | return; | |
2725 | } |