Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
6aba47ca | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
1ecb4ee0 | 4 | Free Software Foundation, Inc. |
8b93c638 JM |
5 | |
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
8b93c638 JM |
9 | (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8b93c638 JM |
18 | |
19 | #include "defs.h" | |
a6c442d8 | 20 | #include "exceptions.h" |
8b93c638 JM |
21 | #include "value.h" |
22 | #include "expression.h" | |
23 | #include "frame.h" | |
8b93c638 JM |
24 | #include "language.h" |
25 | #include "wrapper.h" | |
26 | #include "gdbcmd.h" | |
d2353924 | 27 | #include "block.h" |
a6c442d8 MK |
28 | |
29 | #include "gdb_assert.h" | |
b66d6d2e | 30 | #include "gdb_string.h" |
8b93c638 JM |
31 | |
32 | #include "varobj.h" | |
28335dcc | 33 | #include "vec.h" |
8b93c638 JM |
34 | |
35 | /* Non-zero if we want to see trace of varobj level stuff. */ | |
36 | ||
37 | int varobjdebug = 0; | |
920d2a44 AC |
38 | static void |
39 | show_varobjdebug (struct ui_file *file, int from_tty, | |
40 | struct cmd_list_element *c, const char *value) | |
41 | { | |
42 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
43 | } | |
8b93c638 JM |
44 | |
45 | /* String representations of gdb's format codes */ | |
46 | char *varobj_format_string[] = | |
72330bd6 | 47 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
48 | |
49 | /* String representations of gdb's known languages */ | |
72330bd6 | 50 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
51 | |
52 | /* Data structures */ | |
53 | ||
54 | /* Every root variable has one of these structures saved in its | |
55 | varobj. Members which must be free'd are noted. */ | |
56 | struct varobj_root | |
72330bd6 | 57 | { |
8b93c638 | 58 | |
72330bd6 AC |
59 | /* Alloc'd expression for this parent. */ |
60 | struct expression *exp; | |
8b93c638 | 61 | |
72330bd6 AC |
62 | /* Block for which this expression is valid */ |
63 | struct block *valid_block; | |
8b93c638 | 64 | |
72330bd6 | 65 | /* The frame for this expression */ |
e64d9b3d | 66 | struct frame_id frame; |
8b93c638 | 67 | |
72330bd6 AC |
68 | /* If 1, "update" always recomputes the frame & valid block |
69 | using the currently selected frame. */ | |
70 | int use_selected_frame; | |
73a93a32 | 71 | |
8756216b DP |
72 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
73 | to symbols that do not exist anymore. */ | |
74 | int is_valid; | |
75 | ||
72330bd6 AC |
76 | /* Language info for this variable and its children */ |
77 | struct language_specific *lang; | |
8b93c638 | 78 | |
72330bd6 AC |
79 | /* The varobj for this root node. */ |
80 | struct varobj *rootvar; | |
8b93c638 | 81 | |
72330bd6 AC |
82 | /* Next root variable */ |
83 | struct varobj_root *next; | |
84 | }; | |
8b93c638 | 85 | |
28335dcc VP |
86 | typedef struct varobj *varobj_p; |
87 | ||
88 | DEF_VEC_P (varobj_p); | |
89 | ||
8b93c638 JM |
90 | /* Every variable in the system has a structure of this type defined |
91 | for it. This structure holds all information necessary to manipulate | |
92 | a particular object variable. Members which must be freed are noted. */ | |
93 | struct varobj | |
72330bd6 | 94 | { |
8b93c638 | 95 | |
72330bd6 AC |
96 | /* Alloc'd name of the variable for this object.. If this variable is a |
97 | child, then this name will be the child's source name. | |
98 | (bar, not foo.bar) */ | |
99 | /* NOTE: This is the "expression" */ | |
100 | char *name; | |
8b93c638 | 101 | |
02142340 VP |
102 | /* Alloc'd expression for this child. Can be used to create a |
103 | root variable corresponding to this child. */ | |
104 | char *path_expr; | |
105 | ||
72330bd6 AC |
106 | /* The alloc'd name for this variable's object. This is here for |
107 | convenience when constructing this object's children. */ | |
108 | char *obj_name; | |
8b93c638 | 109 | |
72330bd6 AC |
110 | /* Index of this variable in its parent or -1 */ |
111 | int index; | |
8b93c638 | 112 | |
202ddcaa VP |
113 | /* The type of this variable. This can be NULL |
114 | for artifial variable objects -- currently, the "accessibility" | |
115 | variable objects in C++. */ | |
72330bd6 | 116 | struct type *type; |
8b93c638 | 117 | |
b20d8971 VP |
118 | /* The value of this expression or subexpression. A NULL value |
119 | indicates there was an error getting this value. | |
b2c2bd75 VP |
120 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
121 | the value is either NULL, or not lazy. */ | |
30b28db1 | 122 | struct value *value; |
8b93c638 | 123 | |
72330bd6 AC |
124 | /* The number of (immediate) children this variable has */ |
125 | int num_children; | |
8b93c638 | 126 | |
72330bd6 AC |
127 | /* If this object is a child, this points to its immediate parent. */ |
128 | struct varobj *parent; | |
8b93c638 | 129 | |
28335dcc VP |
130 | /* Children of this object. */ |
131 | VEC (varobj_p) *children; | |
8b93c638 | 132 | |
72330bd6 AC |
133 | /* Description of the root variable. Points to root variable for children. */ |
134 | struct varobj_root *root; | |
8b93c638 | 135 | |
72330bd6 AC |
136 | /* The format of the output for this object */ |
137 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
138 | |
139 | /* Was this variable updated via a varobj_set_value operation */ | |
140 | int updated; | |
85265413 NR |
141 | |
142 | /* Last print value. */ | |
143 | char *print_value; | |
25d5ea92 VP |
144 | |
145 | /* Is this variable frozen. Frozen variables are never implicitly | |
146 | updated by -var-update * | |
147 | or -var-update <direct-or-indirect-parent>. */ | |
148 | int frozen; | |
149 | ||
150 | /* Is the value of this variable intentionally not fetched? It is | |
151 | not fetched if either the variable is frozen, or any parents is | |
152 | frozen. */ | |
153 | int not_fetched; | |
72330bd6 | 154 | }; |
8b93c638 | 155 | |
8b93c638 | 156 | struct cpstack |
72330bd6 AC |
157 | { |
158 | char *name; | |
159 | struct cpstack *next; | |
160 | }; | |
8b93c638 JM |
161 | |
162 | /* A list of varobjs */ | |
163 | ||
164 | struct vlist | |
72330bd6 AC |
165 | { |
166 | struct varobj *var; | |
167 | struct vlist *next; | |
168 | }; | |
8b93c638 JM |
169 | |
170 | /* Private function prototypes */ | |
171 | ||
172 | /* Helper functions for the above subcommands. */ | |
173 | ||
a14ed312 | 174 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 175 | |
a14ed312 KB |
176 | static void delete_variable_1 (struct cpstack **, int *, |
177 | struct varobj *, int, int); | |
8b93c638 | 178 | |
a14ed312 | 179 | static int install_variable (struct varobj *); |
8b93c638 | 180 | |
a14ed312 | 181 | static void uninstall_variable (struct varobj *); |
8b93c638 | 182 | |
a14ed312 | 183 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 184 | |
8b93c638 JM |
185 | /* Utility routines */ |
186 | ||
a14ed312 | 187 | static struct varobj *new_variable (void); |
8b93c638 | 188 | |
a14ed312 | 189 | static struct varobj *new_root_variable (void); |
8b93c638 | 190 | |
a14ed312 | 191 | static void free_variable (struct varobj *var); |
8b93c638 | 192 | |
74b7792f AC |
193 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
194 | ||
a14ed312 | 195 | static struct type *get_type (struct varobj *var); |
8b93c638 | 196 | |
6e2a9270 VP |
197 | static struct type *get_value_type (struct varobj *var); |
198 | ||
a14ed312 | 199 | static struct type *get_target_type (struct type *); |
8b93c638 | 200 | |
a14ed312 | 201 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 202 | |
a14ed312 | 203 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 204 | |
a14ed312 | 205 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 206 | |
acd65feb VP |
207 | static int install_new_value (struct varobj *var, struct value *value, |
208 | int initial); | |
209 | ||
8b93c638 JM |
210 | /* Language-specific routines. */ |
211 | ||
a14ed312 | 212 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 213 | |
a14ed312 | 214 | static int number_of_children (struct varobj *); |
8b93c638 | 215 | |
a14ed312 | 216 | static char *name_of_variable (struct varobj *); |
8b93c638 | 217 | |
a14ed312 | 218 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 219 | |
30b28db1 | 220 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 221 | |
30b28db1 | 222 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 223 | |
a14ed312 | 224 | static char *my_value_of_variable (struct varobj *var); |
8b93c638 | 225 | |
85265413 NR |
226 | static char *value_get_print_value (struct value *value, |
227 | enum varobj_display_formats format); | |
228 | ||
b2c2bd75 VP |
229 | static int varobj_value_is_changeable_p (struct varobj *var); |
230 | ||
231 | static int is_root_p (struct varobj *var); | |
8b93c638 JM |
232 | |
233 | /* C implementation */ | |
234 | ||
a14ed312 | 235 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 236 | |
a14ed312 | 237 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 238 | |
a14ed312 | 239 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 240 | |
02142340 VP |
241 | static char *c_path_expr_of_child (struct varobj *child); |
242 | ||
30b28db1 | 243 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 244 | |
30b28db1 | 245 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 246 | |
a14ed312 | 247 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 248 | |
a14ed312 | 249 | static char *c_value_of_variable (struct varobj *var); |
8b93c638 JM |
250 | |
251 | /* C++ implementation */ | |
252 | ||
a14ed312 | 253 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 254 | |
a14ed312 | 255 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 256 | |
a14ed312 | 257 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 258 | |
a14ed312 | 259 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 260 | |
02142340 VP |
261 | static char *cplus_path_expr_of_child (struct varobj *child); |
262 | ||
30b28db1 | 263 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 264 | |
30b28db1 | 265 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 266 | |
a14ed312 | 267 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 268 | |
a14ed312 | 269 | static char *cplus_value_of_variable (struct varobj *var); |
8b93c638 JM |
270 | |
271 | /* Java implementation */ | |
272 | ||
a14ed312 | 273 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 274 | |
a14ed312 | 275 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 276 | |
a14ed312 | 277 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 278 | |
02142340 VP |
279 | static char *java_path_expr_of_child (struct varobj *child); |
280 | ||
30b28db1 | 281 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 282 | |
30b28db1 | 283 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 284 | |
a14ed312 | 285 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 286 | |
a14ed312 | 287 | static char *java_value_of_variable (struct varobj *var); |
8b93c638 JM |
288 | |
289 | /* The language specific vector */ | |
290 | ||
291 | struct language_specific | |
72330bd6 | 292 | { |
8b93c638 | 293 | |
72330bd6 AC |
294 | /* The language of this variable */ |
295 | enum varobj_languages language; | |
8b93c638 | 296 | |
72330bd6 AC |
297 | /* The number of children of PARENT. */ |
298 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 299 | |
72330bd6 AC |
300 | /* The name (expression) of a root varobj. */ |
301 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 302 | |
72330bd6 AC |
303 | /* The name of the INDEX'th child of PARENT. */ |
304 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 305 | |
02142340 VP |
306 | /* Returns the rooted expression of CHILD, which is a variable |
307 | obtain that has some parent. */ | |
308 | char *(*path_expr_of_child) (struct varobj * child); | |
309 | ||
30b28db1 AC |
310 | /* The ``struct value *'' of the root variable ROOT. */ |
311 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 312 | |
30b28db1 AC |
313 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
314 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 315 | |
72330bd6 AC |
316 | /* The type of the INDEX'th child of PARENT. */ |
317 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 318 | |
72330bd6 AC |
319 | /* The current value of VAR. */ |
320 | char *(*value_of_variable) (struct varobj * var); | |
321 | }; | |
8b93c638 JM |
322 | |
323 | /* Array of known source language routines. */ | |
d5d6fca5 | 324 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
325 | /* Unknown (try treating as C */ |
326 | { | |
72330bd6 AC |
327 | vlang_unknown, |
328 | c_number_of_children, | |
329 | c_name_of_variable, | |
330 | c_name_of_child, | |
02142340 | 331 | c_path_expr_of_child, |
72330bd6 AC |
332 | c_value_of_root, |
333 | c_value_of_child, | |
334 | c_type_of_child, | |
72330bd6 | 335 | c_value_of_variable} |
8b93c638 JM |
336 | , |
337 | /* C */ | |
338 | { | |
72330bd6 AC |
339 | vlang_c, |
340 | c_number_of_children, | |
341 | c_name_of_variable, | |
342 | c_name_of_child, | |
02142340 | 343 | c_path_expr_of_child, |
72330bd6 AC |
344 | c_value_of_root, |
345 | c_value_of_child, | |
346 | c_type_of_child, | |
72330bd6 | 347 | c_value_of_variable} |
8b93c638 JM |
348 | , |
349 | /* C++ */ | |
350 | { | |
72330bd6 AC |
351 | vlang_cplus, |
352 | cplus_number_of_children, | |
353 | cplus_name_of_variable, | |
354 | cplus_name_of_child, | |
02142340 | 355 | cplus_path_expr_of_child, |
72330bd6 AC |
356 | cplus_value_of_root, |
357 | cplus_value_of_child, | |
358 | cplus_type_of_child, | |
72330bd6 | 359 | cplus_value_of_variable} |
8b93c638 JM |
360 | , |
361 | /* Java */ | |
362 | { | |
72330bd6 AC |
363 | vlang_java, |
364 | java_number_of_children, | |
365 | java_name_of_variable, | |
366 | java_name_of_child, | |
02142340 | 367 | java_path_expr_of_child, |
72330bd6 AC |
368 | java_value_of_root, |
369 | java_value_of_child, | |
370 | java_type_of_child, | |
72330bd6 | 371 | java_value_of_variable} |
8b93c638 JM |
372 | }; |
373 | ||
374 | /* A little convenience enum for dealing with C++/Java */ | |
375 | enum vsections | |
72330bd6 AC |
376 | { |
377 | v_public = 0, v_private, v_protected | |
378 | }; | |
8b93c638 JM |
379 | |
380 | /* Private data */ | |
381 | ||
382 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 383 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
384 | |
385 | /* Header of the list of root variable objects */ | |
386 | static struct varobj_root *rootlist; | |
387 | static int rootcount = 0; /* number of root varobjs in the list */ | |
388 | ||
389 | /* Prime number indicating the number of buckets in the hash table */ | |
390 | /* A prime large enough to avoid too many colisions */ | |
391 | #define VAROBJ_TABLE_SIZE 227 | |
392 | ||
393 | /* Pointer to the varobj hash table (built at run time) */ | |
394 | static struct vlist **varobj_table; | |
395 | ||
8b93c638 JM |
396 | /* Is the variable X one of our "fake" children? */ |
397 | #define CPLUS_FAKE_CHILD(x) \ | |
398 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
399 | \f | |
400 | ||
401 | /* API Implementation */ | |
b2c2bd75 VP |
402 | static int |
403 | is_root_p (struct varobj *var) | |
404 | { | |
405 | return (var->root->rootvar == var); | |
406 | } | |
8b93c638 JM |
407 | |
408 | /* Creates a varobj (not its children) */ | |
409 | ||
7d8547c9 AC |
410 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
411 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
412 | ||
413 | static struct frame_info * | |
414 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
415 | { | |
416 | struct frame_info *frame = NULL; | |
417 | ||
418 | if (frame_addr == (CORE_ADDR) 0) | |
419 | return NULL; | |
420 | ||
421 | while (1) | |
422 | { | |
423 | frame = get_prev_frame (frame); | |
424 | if (frame == NULL) | |
425 | return NULL; | |
eb5492fa | 426 | if (get_frame_base_address (frame) == frame_addr) |
7d8547c9 AC |
427 | return frame; |
428 | } | |
429 | } | |
430 | ||
8b93c638 JM |
431 | struct varobj * |
432 | varobj_create (char *objname, | |
72330bd6 | 433 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
434 | { |
435 | struct varobj *var; | |
2c67cb8b AC |
436 | struct frame_info *fi; |
437 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
438 | struct block *block; |
439 | struct cleanup *old_chain; | |
440 | ||
441 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
442 | var = new_root_variable (); | |
74b7792f | 443 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
444 | |
445 | if (expression != NULL) | |
446 | { | |
447 | char *p; | |
448 | enum varobj_languages lang; | |
e55dccf0 | 449 | struct value *value = NULL; |
02142340 | 450 | int expr_len; |
8b93c638 JM |
451 | |
452 | /* Parse and evaluate the expression, filling in as much | |
453 | of the variable's data as possible */ | |
454 | ||
455 | /* Allow creator to specify context of variable */ | |
72330bd6 | 456 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
206415a3 | 457 | fi = deprecated_safe_get_selected_frame (); |
8b93c638 | 458 | else |
7d8547c9 AC |
459 | /* FIXME: cagney/2002-11-23: This code should be doing a |
460 | lookup using the frame ID and not just the frame's | |
461 | ``address''. This, of course, means an interface change. | |
462 | However, with out that interface change ISAs, such as the | |
463 | ia64 with its two stacks, won't work. Similar goes for the | |
464 | case where there is a frameless function. */ | |
8b93c638 JM |
465 | fi = find_frame_addr_in_frame_chain (frame); |
466 | ||
73a93a32 JI |
467 | /* frame = -2 means always use selected frame */ |
468 | if (type == USE_SELECTED_FRAME) | |
469 | var->root->use_selected_frame = 1; | |
470 | ||
8b93c638 JM |
471 | block = NULL; |
472 | if (fi != NULL) | |
ae767bfb | 473 | block = get_frame_block (fi, 0); |
8b93c638 JM |
474 | |
475 | p = expression; | |
476 | innermost_block = NULL; | |
73a93a32 JI |
477 | /* Wrap the call to parse expression, so we can |
478 | return a sensible error. */ | |
479 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
480 | { | |
481 | return NULL; | |
482 | } | |
8b93c638 JM |
483 | |
484 | /* Don't allow variables to be created for types. */ | |
485 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
486 | { | |
487 | do_cleanups (old_chain); | |
bc8332bb AC |
488 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
489 | " as an expression.\n"); | |
8b93c638 JM |
490 | return NULL; |
491 | } | |
492 | ||
493 | var->format = variable_default_display (var); | |
494 | var->root->valid_block = innermost_block; | |
02142340 VP |
495 | expr_len = strlen (expression); |
496 | var->name = savestring (expression, expr_len); | |
497 | /* For a root var, the name and the expr are the same. */ | |
498 | var->path_expr = savestring (expression, expr_len); | |
8b93c638 JM |
499 | |
500 | /* When the frame is different from the current frame, | |
501 | we must select the appropriate frame before parsing | |
502 | the expression, otherwise the value will not be current. | |
503 | Since select_frame is so benign, just call it for all cases. */ | |
504 | if (fi != NULL) | |
505 | { | |
7a424e99 | 506 | var->root->frame = get_frame_id (fi); |
206415a3 | 507 | old_fi = get_selected_frame (NULL); |
0f7d239c | 508 | select_frame (fi); |
8b93c638 JM |
509 | } |
510 | ||
340a7723 | 511 | /* We definitely need to catch errors here. |
8b93c638 JM |
512 | If evaluate_expression succeeds we got the value we wanted. |
513 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb | 514 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
e55dccf0 VP |
515 | { |
516 | /* Error getting the value. Try to at least get the | |
517 | right type. */ | |
518 | struct value *type_only_value = evaluate_type (var->root->exp); | |
519 | var->type = value_type (type_only_value); | |
520 | } | |
521 | else | |
522 | var->type = value_type (value); | |
acd65feb | 523 | |
acd65feb | 524 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
525 | |
526 | /* Set language info */ | |
527 | lang = variable_language (var); | |
d5d6fca5 | 528 | var->root->lang = &languages[lang]; |
8b93c638 JM |
529 | |
530 | /* Set ourselves as our root */ | |
531 | var->root->rootvar = var; | |
532 | ||
533 | /* Reset the selected frame */ | |
534 | if (fi != NULL) | |
0f7d239c | 535 | select_frame (old_fi); |
8b93c638 JM |
536 | } |
537 | ||
73a93a32 JI |
538 | /* If the variable object name is null, that means this |
539 | is a temporary variable, so don't install it. */ | |
540 | ||
541 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 JM |
542 | { |
543 | var->obj_name = savestring (objname, strlen (objname)); | |
544 | ||
545 | /* If a varobj name is duplicated, the install will fail so | |
546 | we must clenup */ | |
547 | if (!install_variable (var)) | |
548 | { | |
549 | do_cleanups (old_chain); | |
550 | return NULL; | |
551 | } | |
552 | } | |
553 | ||
554 | discard_cleanups (old_chain); | |
555 | return var; | |
556 | } | |
557 | ||
558 | /* Generates an unique name that can be used for a varobj */ | |
559 | ||
560 | char * | |
561 | varobj_gen_name (void) | |
562 | { | |
563 | static int id = 0; | |
e64d9b3d | 564 | char *obj_name; |
8b93c638 JM |
565 | |
566 | /* generate a name for this object */ | |
567 | id++; | |
b435e160 | 568 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 569 | |
e64d9b3d | 570 | return obj_name; |
8b93c638 JM |
571 | } |
572 | ||
573 | /* Given an "objname", returns the pointer to the corresponding varobj | |
574 | or NULL if not found */ | |
575 | ||
576 | struct varobj * | |
577 | varobj_get_handle (char *objname) | |
578 | { | |
579 | struct vlist *cv; | |
580 | const char *chp; | |
581 | unsigned int index = 0; | |
582 | unsigned int i = 1; | |
583 | ||
584 | for (chp = objname; *chp; chp++) | |
585 | { | |
586 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
587 | } | |
588 | ||
589 | cv = *(varobj_table + index); | |
590 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
591 | cv = cv->next; | |
592 | ||
593 | if (cv == NULL) | |
8a3fe4f8 | 594 | error (_("Variable object not found")); |
8b93c638 JM |
595 | |
596 | return cv->var; | |
597 | } | |
598 | ||
599 | /* Given the handle, return the name of the object */ | |
600 | ||
601 | char * | |
602 | varobj_get_objname (struct varobj *var) | |
603 | { | |
604 | return var->obj_name; | |
605 | } | |
606 | ||
607 | /* Given the handle, return the expression represented by the object */ | |
608 | ||
609 | char * | |
610 | varobj_get_expression (struct varobj *var) | |
611 | { | |
612 | return name_of_variable (var); | |
613 | } | |
614 | ||
615 | /* Deletes a varobj and all its children if only_children == 0, | |
616 | otherwise deletes only the children; returns a malloc'ed list of all the | |
617 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
618 | ||
619 | int | |
620 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
621 | { | |
622 | int delcount; | |
623 | int mycount; | |
624 | struct cpstack *result = NULL; | |
625 | char **cp; | |
626 | ||
627 | /* Initialize a stack for temporary results */ | |
628 | cppush (&result, NULL); | |
629 | ||
630 | if (only_children) | |
631 | /* Delete only the variable children */ | |
632 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
633 | else | |
634 | /* Delete the variable and all its children */ | |
635 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
636 | ||
637 | /* We may have been asked to return a list of what has been deleted */ | |
638 | if (dellist != NULL) | |
639 | { | |
640 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
641 | ||
642 | cp = *dellist; | |
643 | mycount = delcount; | |
644 | *cp = cppop (&result); | |
645 | while ((*cp != NULL) && (mycount > 0)) | |
646 | { | |
647 | mycount--; | |
648 | cp++; | |
649 | *cp = cppop (&result); | |
650 | } | |
651 | ||
652 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 653 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 654 | mycount); |
8b93c638 JM |
655 | } |
656 | ||
657 | return delcount; | |
658 | } | |
659 | ||
660 | /* Set/Get variable object display format */ | |
661 | ||
662 | enum varobj_display_formats | |
663 | varobj_set_display_format (struct varobj *var, | |
664 | enum varobj_display_formats format) | |
665 | { | |
666 | switch (format) | |
667 | { | |
668 | case FORMAT_NATURAL: | |
669 | case FORMAT_BINARY: | |
670 | case FORMAT_DECIMAL: | |
671 | case FORMAT_HEXADECIMAL: | |
672 | case FORMAT_OCTAL: | |
673 | var->format = format; | |
674 | break; | |
675 | ||
676 | default: | |
677 | var->format = variable_default_display (var); | |
678 | } | |
679 | ||
680 | return var->format; | |
681 | } | |
682 | ||
683 | enum varobj_display_formats | |
684 | varobj_get_display_format (struct varobj *var) | |
685 | { | |
686 | return var->format; | |
687 | } | |
688 | ||
25d5ea92 VP |
689 | void |
690 | varobj_set_frozen (struct varobj *var, int frozen) | |
691 | { | |
692 | /* When a variable is unfrozen, we don't fetch its value. | |
693 | The 'not_fetched' flag remains set, so next -var-update | |
694 | won't complain. | |
695 | ||
696 | We don't fetch the value, because for structures the client | |
697 | should do -var-update anyway. It would be bad to have different | |
698 | client-size logic for structure and other types. */ | |
699 | var->frozen = frozen; | |
700 | } | |
701 | ||
702 | int | |
703 | varobj_get_frozen (struct varobj *var) | |
704 | { | |
705 | return var->frozen; | |
706 | } | |
707 | ||
708 | ||
8b93c638 JM |
709 | int |
710 | varobj_get_num_children (struct varobj *var) | |
711 | { | |
712 | if (var->num_children == -1) | |
713 | var->num_children = number_of_children (var); | |
714 | ||
715 | return var->num_children; | |
716 | } | |
717 | ||
718 | /* Creates a list of the immediate children of a variable object; | |
719 | the return code is the number of such children or -1 on error */ | |
720 | ||
721 | int | |
722 | varobj_list_children (struct varobj *var, struct varobj ***childlist) | |
723 | { | |
724 | struct varobj *child; | |
725 | char *name; | |
726 | int i; | |
727 | ||
728 | /* sanity check: have we been passed a pointer? */ | |
729 | if (childlist == NULL) | |
730 | return -1; | |
731 | ||
732 | *childlist = NULL; | |
733 | ||
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) | |
739 | return -1; | |
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 | /* List of children */ |
747 | *childlist = xmalloc ((var->num_children + 1) * sizeof (struct varobj *)); | |
748 | ||
749 | for (i = 0; i < var->num_children; i++) | |
750 | { | |
28335dcc VP |
751 | varobj_p existing; |
752 | ||
8b93c638 JM |
753 | /* Mark as the end in case we bail out */ |
754 | *((*childlist) + i) = NULL; | |
755 | ||
28335dcc VP |
756 | existing = VEC_index (varobj_p, var->children, i); |
757 | ||
758 | if (existing == NULL) | |
759 | { | |
760 | /* Either it's the first call to varobj_list_children for | |
761 | this variable object, and the child was never created, | |
762 | or it was explicitly deleted by the client. */ | |
763 | name = name_of_child (var, i); | |
764 | existing = create_child (var, i, name); | |
765 | VEC_replace (varobj_p, var->children, i, existing); | |
766 | } | |
8b93c638 | 767 | |
28335dcc | 768 | *((*childlist) + i) = existing; |
8b93c638 JM |
769 | } |
770 | ||
771 | /* End of list is marked by a NULL pointer */ | |
772 | *((*childlist) + i) = NULL; | |
773 | ||
774 | return var->num_children; | |
775 | } | |
776 | ||
777 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
778 | prints on the console */ | |
779 | ||
780 | char * | |
781 | varobj_get_type (struct varobj *var) | |
782 | { | |
30b28db1 | 783 | struct value *val; |
8b93c638 JM |
784 | struct cleanup *old_chain; |
785 | struct ui_file *stb; | |
786 | char *thetype; | |
787 | long length; | |
788 | ||
789 | /* For the "fake" variables, do not return a type. (It's type is | |
8756216b DP |
790 | NULL, too.) |
791 | Do not return a type for invalid variables as well. */ | |
792 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
793 | return NULL; |
794 | ||
795 | stb = mem_fileopen (); | |
796 | old_chain = make_cleanup_ui_file_delete (stb); | |
797 | ||
30b28db1 | 798 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
799 | cast it to our type. We then typeprint this variable. */ |
800 | val = value_zero (var->type, not_lval); | |
df407dfe | 801 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
802 | |
803 | thetype = ui_file_xstrdup (stb, &length); | |
804 | do_cleanups (old_chain); | |
805 | return thetype; | |
806 | } | |
807 | ||
1ecb4ee0 DJ |
808 | /* Obtain the type of an object variable. */ |
809 | ||
810 | struct type * | |
811 | varobj_get_gdb_type (struct varobj *var) | |
812 | { | |
813 | return var->type; | |
814 | } | |
815 | ||
02142340 VP |
816 | /* Return a pointer to the full rooted expression of varobj VAR. |
817 | If it has not been computed yet, compute it. */ | |
818 | char * | |
819 | varobj_get_path_expr (struct varobj *var) | |
820 | { | |
821 | if (var->path_expr != NULL) | |
822 | return var->path_expr; | |
823 | else | |
824 | { | |
825 | /* For root varobjs, we initialize path_expr | |
826 | when creating varobj, so here it should be | |
827 | child varobj. */ | |
828 | gdb_assert (!is_root_p (var)); | |
829 | return (*var->root->lang->path_expr_of_child) (var); | |
830 | } | |
831 | } | |
832 | ||
8b93c638 JM |
833 | enum varobj_languages |
834 | varobj_get_language (struct varobj *var) | |
835 | { | |
836 | return variable_language (var); | |
837 | } | |
838 | ||
839 | int | |
840 | varobj_get_attributes (struct varobj *var) | |
841 | { | |
842 | int attributes = 0; | |
843 | ||
340a7723 | 844 | if (varobj_editable_p (var)) |
8b93c638 JM |
845 | /* FIXME: define masks for attributes */ |
846 | attributes |= 0x00000001; /* Editable */ | |
847 | ||
848 | return attributes; | |
849 | } | |
850 | ||
851 | char * | |
852 | varobj_get_value (struct varobj *var) | |
853 | { | |
854 | return my_value_of_variable (var); | |
855 | } | |
856 | ||
857 | /* Set the value of an object variable (if it is editable) to the | |
858 | value of the given expression */ | |
859 | /* Note: Invokes functions that can call error() */ | |
860 | ||
861 | int | |
862 | varobj_set_value (struct varobj *var, char *expression) | |
863 | { | |
30b28db1 | 864 | struct value *val; |
8b93c638 | 865 | int offset = 0; |
a6c442d8 | 866 | int error = 0; |
8b93c638 JM |
867 | |
868 | /* The argument "expression" contains the variable's new value. | |
869 | We need to first construct a legal expression for this -- ugh! */ | |
870 | /* Does this cover all the bases? */ | |
871 | struct expression *exp; | |
30b28db1 | 872 | struct value *value; |
8b93c638 | 873 | int saved_input_radix = input_radix; |
340a7723 NR |
874 | char *s = expression; |
875 | int i; | |
8b93c638 | 876 | |
340a7723 | 877 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 878 | |
340a7723 NR |
879 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ |
880 | exp = parse_exp_1 (&s, 0, 0); | |
881 | if (!gdb_evaluate_expression (exp, &value)) | |
882 | { | |
883 | /* We cannot proceed without a valid expression. */ | |
884 | xfree (exp); | |
885 | return 0; | |
8b93c638 JM |
886 | } |
887 | ||
340a7723 NR |
888 | /* All types that are editable must also be changeable. */ |
889 | gdb_assert (varobj_value_is_changeable_p (var)); | |
890 | ||
891 | /* The value of a changeable variable object must not be lazy. */ | |
892 | gdb_assert (!value_lazy (var->value)); | |
893 | ||
894 | /* Need to coerce the input. We want to check if the | |
895 | value of the variable object will be different | |
896 | after assignment, and the first thing value_assign | |
897 | does is coerce the input. | |
898 | For example, if we are assigning an array to a pointer variable we | |
899 | should compare the pointer with the the array's address, not with the | |
900 | array's content. */ | |
901 | value = coerce_array (value); | |
902 | ||
903 | /* The new value may be lazy. gdb_value_assign, or | |
904 | rather value_contents, will take care of this. | |
905 | If fetching of the new value will fail, gdb_value_assign | |
906 | with catch the exception. */ | |
907 | if (!gdb_value_assign (var->value, value, &val)) | |
908 | return 0; | |
909 | ||
910 | /* If the value has changed, record it, so that next -var-update can | |
911 | report this change. If a variable had a value of '1', we've set it | |
912 | to '333' and then set again to '1', when -var-update will report this | |
913 | variable as changed -- because the first assignment has set the | |
914 | 'updated' flag. There's no need to optimize that, because return value | |
915 | of -var-update should be considered an approximation. */ | |
916 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
917 | input_radix = saved_input_radix; | |
918 | return 1; | |
8b93c638 JM |
919 | } |
920 | ||
921 | /* Returns a malloc'ed list with all root variable objects */ | |
922 | int | |
923 | varobj_list (struct varobj ***varlist) | |
924 | { | |
925 | struct varobj **cv; | |
926 | struct varobj_root *croot; | |
927 | int mycount = rootcount; | |
928 | ||
929 | /* Alloc (rootcount + 1) entries for the result */ | |
930 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
931 | ||
932 | cv = *varlist; | |
933 | croot = rootlist; | |
934 | while ((croot != NULL) && (mycount > 0)) | |
935 | { | |
936 | *cv = croot->rootvar; | |
937 | mycount--; | |
938 | cv++; | |
939 | croot = croot->next; | |
940 | } | |
941 | /* Mark the end of the list */ | |
942 | *cv = NULL; | |
943 | ||
944 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
945 | warning |
946 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
947 | rootcount, mycount); | |
8b93c638 JM |
948 | |
949 | return rootcount; | |
950 | } | |
951 | ||
acd65feb VP |
952 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
953 | this is the first assignement after the variable object was just | |
954 | created, or changed type. In that case, just assign the value | |
955 | and return 0. | |
956 | Otherwise, assign the value and if type_changeable returns non-zero, | |
957 | find if the new value is different from the current value. | |
b26ed50d VP |
958 | Return 1 if so, and 0 if the values are equal. |
959 | ||
960 | The VALUE parameter should not be released -- the function will | |
961 | take care of releasing it when needed. */ | |
acd65feb VP |
962 | static int |
963 | install_new_value (struct varobj *var, struct value *value, int initial) | |
964 | { | |
965 | int changeable; | |
966 | int need_to_fetch; | |
967 | int changed = 0; | |
25d5ea92 | 968 | int intentionally_not_fetched = 0; |
7a4d50bf | 969 | char *print_value = NULL; |
acd65feb | 970 | |
acd65feb VP |
971 | /* We need to know the varobj's type to decide if the value should |
972 | be fetched or not. C++ fake children (public/protected/private) don't have | |
973 | a type. */ | |
974 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 975 | changeable = varobj_value_is_changeable_p (var); |
acd65feb VP |
976 | need_to_fetch = changeable; |
977 | ||
b26ed50d VP |
978 | /* We are not interested in the address of references, and given |
979 | that in C++ a reference is not rebindable, it cannot | |
980 | meaningfully change. So, get hold of the real value. */ | |
981 | if (value) | |
982 | { | |
983 | value = coerce_ref (value); | |
984 | release_value (value); | |
985 | } | |
986 | ||
acd65feb VP |
987 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
988 | /* For unions, we need to fetch the value implicitly because | |
989 | of implementation of union member fetch. When gdb | |
990 | creates a value for a field and the value of the enclosing | |
991 | structure is not lazy, it immediately copies the necessary | |
992 | bytes from the enclosing values. If the enclosing value is | |
993 | lazy, the call to value_fetch_lazy on the field will read | |
994 | the data from memory. For unions, that means we'll read the | |
995 | same memory more than once, which is not desirable. So | |
996 | fetch now. */ | |
997 | need_to_fetch = 1; | |
998 | ||
999 | /* The new value might be lazy. If the type is changeable, | |
1000 | that is we'll be comparing values of this type, fetch the | |
1001 | value now. Otherwise, on the next update the old value | |
1002 | will be lazy, which means we've lost that old value. */ | |
1003 | if (need_to_fetch && value && value_lazy (value)) | |
1004 | { | |
25d5ea92 VP |
1005 | struct varobj *parent = var->parent; |
1006 | int frozen = var->frozen; | |
1007 | for (; !frozen && parent; parent = parent->parent) | |
1008 | frozen |= parent->frozen; | |
1009 | ||
1010 | if (frozen && initial) | |
1011 | { | |
1012 | /* For variables that are frozen, or are children of frozen | |
1013 | variables, we don't do fetch on initial assignment. | |
1014 | For non-initial assignemnt we do the fetch, since it means we're | |
1015 | explicitly asked to compare the new value with the old one. */ | |
1016 | intentionally_not_fetched = 1; | |
1017 | } | |
1018 | else if (!gdb_value_fetch_lazy (value)) | |
acd65feb | 1019 | { |
acd65feb VP |
1020 | /* Set the value to NULL, so that for the next -var-update, |
1021 | we don't try to compare the new value with this value, | |
1022 | that we couldn't even read. */ | |
1023 | value = NULL; | |
1024 | } | |
acd65feb VP |
1025 | } |
1026 | ||
7a4d50bf VP |
1027 | /* Below, we'll be comparing string rendering of old and new |
1028 | values. Don't get string rendering if the value is | |
1029 | lazy -- if it is, the code above has decided that the value | |
1030 | should not be fetched. */ | |
1031 | if (value && !value_lazy (value)) | |
1032 | print_value = value_get_print_value (value, var->format); | |
1033 | ||
acd65feb VP |
1034 | /* If the type is changeable, compare the old and the new values. |
1035 | If this is the initial assignment, we don't have any old value | |
1036 | to compare with. */ | |
7a4d50bf | 1037 | if (!initial && changeable) |
acd65feb VP |
1038 | { |
1039 | /* If the value of the varobj was changed by -var-set-value, then the | |
1040 | value in the varobj and in the target is the same. However, that value | |
1041 | is different from the value that the varobj had after the previous | |
57e66780 | 1042 | -var-update. So need to the varobj as changed. */ |
acd65feb | 1043 | if (var->updated) |
57e66780 | 1044 | { |
57e66780 DJ |
1045 | changed = 1; |
1046 | } | |
acd65feb VP |
1047 | else |
1048 | { | |
1049 | /* Try to compare the values. That requires that both | |
1050 | values are non-lazy. */ | |
25d5ea92 VP |
1051 | if (var->not_fetched && value_lazy (var->value)) |
1052 | { | |
1053 | /* This is a frozen varobj and the value was never read. | |
1054 | Presumably, UI shows some "never read" indicator. | |
1055 | Now that we've fetched the real value, we need to report | |
1056 | this varobj as changed so that UI can show the real | |
1057 | value. */ | |
1058 | changed = 1; | |
1059 | } | |
1060 | else if (var->value == NULL && value == NULL) | |
acd65feb VP |
1061 | /* Equal. */ |
1062 | ; | |
1063 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1064 | { |
57e66780 DJ |
1065 | changed = 1; |
1066 | } | |
acd65feb VP |
1067 | else |
1068 | { | |
1069 | gdb_assert (!value_lazy (var->value)); | |
1070 | gdb_assert (!value_lazy (value)); | |
85265413 | 1071 | |
57e66780 | 1072 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1073 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1074 | changed = 1; |
acd65feb VP |
1075 | } |
1076 | } | |
1077 | } | |
85265413 | 1078 | |
acd65feb | 1079 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1080 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1081 | value_free (var->value); |
1082 | var->value = value; | |
7a4d50bf VP |
1083 | if (var->print_value) |
1084 | xfree (var->print_value); | |
1085 | var->print_value = print_value; | |
25d5ea92 VP |
1086 | if (value && value_lazy (value) && intentionally_not_fetched) |
1087 | var->not_fetched = 1; | |
1088 | else | |
1089 | var->not_fetched = 0; | |
acd65feb | 1090 | var->updated = 0; |
85265413 | 1091 | |
b26ed50d | 1092 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1093 | |
1094 | return changed; | |
1095 | } | |
acd65feb | 1096 | |
8b93c638 JM |
1097 | /* Update the values for a variable and its children. This is a |
1098 | two-pronged attack. First, re-parse the value for the root's | |
1099 | expression to see if it's changed. Then go all the way | |
1100 | through its children, reconstructing them and noting if they've | |
1101 | changed. | |
8756216b DP |
1102 | Return value: |
1103 | < 0 for error values, see varobj.h. | |
1104 | Otherwise it is the number of children + parent changed. | |
8b93c638 | 1105 | |
25d5ea92 VP |
1106 | The EXPLICIT parameter specifies if this call is result |
1107 | of MI request to update this specific variable, or | |
1108 | result of implicit -var-update *. For implicit request, we don't | |
1109 | update frozen variables. | |
705da579 KS |
1110 | |
1111 | NOTE: This function may delete the caller's varobj. If it | |
8756216b DP |
1112 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1113 | to point to the new varobj. */ | |
8b93c638 JM |
1114 | |
1115 | int | |
25d5ea92 VP |
1116 | varobj_update (struct varobj **varp, struct varobj ***changelist, |
1117 | int explicit) | |
8b93c638 JM |
1118 | { |
1119 | int changed = 0; | |
25d5ea92 | 1120 | int type_changed = 0; |
8b93c638 JM |
1121 | int i; |
1122 | int vleft; | |
8b93c638 JM |
1123 | struct varobj *v; |
1124 | struct varobj **cv; | |
2c67cb8b | 1125 | struct varobj **templist = NULL; |
30b28db1 | 1126 | struct value *new; |
28335dcc VP |
1127 | VEC (varobj_p) *stack = NULL; |
1128 | VEC (varobj_p) *result = NULL; | |
e64d9b3d MH |
1129 | struct frame_id old_fid; |
1130 | struct frame_info *fi; | |
8b93c638 | 1131 | |
8756216b | 1132 | /* sanity check: have we been passed a pointer? */ |
a1f42e84 | 1133 | gdb_assert (changelist); |
8b93c638 | 1134 | |
25d5ea92 VP |
1135 | /* Frozen means frozen -- we don't check for any change in |
1136 | this varobj, including its going out of scope, or | |
1137 | changing type. One use case for frozen varobjs is | |
1138 | retaining previously evaluated expressions, and we don't | |
1139 | want them to be reevaluated at all. */ | |
1140 | if (!explicit && (*varp)->frozen) | |
1141 | return 0; | |
8756216b DP |
1142 | |
1143 | if (!(*varp)->root->is_valid) | |
1144 | return INVALID; | |
8b93c638 | 1145 | |
25d5ea92 | 1146 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1147 | { |
25d5ea92 VP |
1148 | /* Save the selected stack frame, since we will need to change it |
1149 | in order to evaluate expressions. */ | |
1150 | old_fid = get_frame_id (deprecated_safe_get_selected_frame ()); | |
1151 | ||
1152 | /* Update the root variable. value_of_root can return NULL | |
1153 | if the variable is no longer around, i.e. we stepped out of | |
1154 | the frame in which a local existed. We are letting the | |
1155 | value_of_root variable dispose of the varobj if the type | |
1156 | has changed. */ | |
1157 | type_changed = 1; | |
1158 | new = value_of_root (varp, &type_changed); | |
1159 | ||
1160 | /* Restore selected frame. */ | |
1161 | fi = frame_find_by_id (old_fid); | |
1162 | if (fi) | |
1163 | select_frame (fi); | |
1164 | ||
1165 | /* If this is a "use_selected_frame" varobj, and its type has changed, | |
1166 | them note that it's changed. */ | |
1167 | if (type_changed) | |
1168 | VEC_safe_push (varobj_p, result, *varp); | |
1169 | ||
1170 | if (install_new_value ((*varp), new, type_changed)) | |
1171 | { | |
1172 | /* If type_changed is 1, install_new_value will never return | |
1173 | non-zero, so we'll never report the same variable twice. */ | |
1174 | gdb_assert (!type_changed); | |
1175 | VEC_safe_push (varobj_p, result, *varp); | |
1176 | } | |
8b93c638 | 1177 | |
25d5ea92 VP |
1178 | if (new == NULL) |
1179 | { | |
1180 | /* This means the varobj itself is out of scope. | |
1181 | Report it. */ | |
1182 | VEC_free (varobj_p, result); | |
1183 | return NOT_IN_SCOPE; | |
1184 | } | |
b20d8971 VP |
1185 | } |
1186 | ||
28335dcc | 1187 | VEC_safe_push (varobj_p, stack, *varp); |
8b93c638 | 1188 | |
8756216b | 1189 | /* Walk through the children, reconstructing them all. */ |
28335dcc | 1190 | while (!VEC_empty (varobj_p, stack)) |
8b93c638 | 1191 | { |
28335dcc VP |
1192 | v = VEC_pop (varobj_p, stack); |
1193 | ||
1194 | /* Push any children. Use reverse order so that the first | |
1195 | child is popped from the work stack first, and so | |
1196 | will be added to result first. This does not | |
1197 | affect correctness, just "nicer". */ | |
1198 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1199 | { |
28335dcc VP |
1200 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1201 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
25d5ea92 | 1202 | if (c != NULL && !c->frozen) |
28335dcc | 1203 | VEC_safe_push (varobj_p, stack, c); |
8b93c638 JM |
1204 | } |
1205 | ||
28335dcc VP |
1206 | /* Update this variable, unless it's a root, which is already |
1207 | updated. */ | |
25d5ea92 | 1208 | if (v->root->rootvar != v) |
28335dcc VP |
1209 | { |
1210 | new = value_of_child (v->parent, v->index); | |
1211 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1212 | { | |
1213 | /* Note that it's changed */ | |
1214 | VEC_safe_push (varobj_p, result, v); | |
1215 | v->updated = 0; | |
1216 | } | |
8b93c638 | 1217 | } |
8b93c638 JM |
1218 | } |
1219 | ||
8756216b | 1220 | /* Alloc (changed + 1) list entries. */ |
28335dcc | 1221 | changed = VEC_length (varobj_p, result); |
8b93c638 | 1222 | *changelist = xmalloc ((changed + 1) * sizeof (struct varobj *)); |
28335dcc | 1223 | cv = *changelist; |
8b93c638 | 1224 | |
28335dcc | 1225 | for (i = 0; i < changed; ++i) |
8b93c638 | 1226 | { |
28335dcc VP |
1227 | *cv = VEC_index (varobj_p, result, i); |
1228 | gdb_assert (*cv != NULL); | |
1229 | ++cv; | |
8b93c638 | 1230 | } |
28335dcc | 1231 | *cv = 0; |
8b93c638 | 1232 | |
93b979d6 NR |
1233 | VEC_free (varobj_p, stack); |
1234 | VEC_free (varobj_p, result); | |
1235 | ||
73a93a32 | 1236 | if (type_changed) |
8756216b | 1237 | return TYPE_CHANGED; |
73a93a32 JI |
1238 | else |
1239 | return changed; | |
8b93c638 JM |
1240 | } |
1241 | \f | |
1242 | ||
1243 | /* Helper functions */ | |
1244 | ||
1245 | /* | |
1246 | * Variable object construction/destruction | |
1247 | */ | |
1248 | ||
1249 | static int | |
fba45db2 KB |
1250 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1251 | int only_children_p) | |
8b93c638 JM |
1252 | { |
1253 | int delcount = 0; | |
1254 | ||
1255 | delete_variable_1 (resultp, &delcount, var, | |
1256 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1257 | ||
1258 | return delcount; | |
1259 | } | |
1260 | ||
1261 | /* Delete the variable object VAR and its children */ | |
1262 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1263 | and the parent is not removed we dump core. It must be always | |
1264 | initially called with remove_from_parent_p set */ | |
1265 | static void | |
72330bd6 AC |
1266 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1267 | struct varobj *var, int only_children_p, | |
1268 | int remove_from_parent_p) | |
8b93c638 | 1269 | { |
28335dcc | 1270 | int i; |
8b93c638 JM |
1271 | |
1272 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1273 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1274 | { | |
1275 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
214270ab VP |
1276 | if (!child) |
1277 | continue; | |
8b93c638 | 1278 | if (!remove_from_parent_p) |
28335dcc VP |
1279 | child->parent = NULL; |
1280 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1281 | } |
28335dcc | 1282 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1283 | |
1284 | /* if we were called to delete only the children we are done here */ | |
1285 | if (only_children_p) | |
1286 | return; | |
1287 | ||
1288 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1289 | /* If the name is null, this is a temporary variable, that has not |
1290 | yet been installed, don't report it, it belongs to the caller... */ | |
1291 | if (var->obj_name != NULL) | |
8b93c638 | 1292 | { |
5b616ba1 | 1293 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1294 | *delcountp = *delcountp + 1; |
1295 | } | |
1296 | ||
1297 | /* If this variable has a parent, remove it from its parent's list */ | |
1298 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1299 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1300 | expensive list search to find the element to remove when we are | |
1301 | discarding the list afterwards */ | |
72330bd6 | 1302 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1303 | { |
28335dcc | 1304 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1305 | } |
72330bd6 | 1306 | |
73a93a32 JI |
1307 | if (var->obj_name != NULL) |
1308 | uninstall_variable (var); | |
8b93c638 JM |
1309 | |
1310 | /* Free memory associated with this variable */ | |
1311 | free_variable (var); | |
1312 | } | |
1313 | ||
1314 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1315 | static int | |
fba45db2 | 1316 | install_variable (struct varobj *var) |
8b93c638 JM |
1317 | { |
1318 | struct vlist *cv; | |
1319 | struct vlist *newvl; | |
1320 | const char *chp; | |
1321 | unsigned int index = 0; | |
1322 | unsigned int i = 1; | |
1323 | ||
1324 | for (chp = var->obj_name; *chp; chp++) | |
1325 | { | |
1326 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1327 | } | |
1328 | ||
1329 | cv = *(varobj_table + index); | |
1330 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1331 | cv = cv->next; | |
1332 | ||
1333 | if (cv != NULL) | |
8a3fe4f8 | 1334 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1335 | |
1336 | /* Add varobj to hash table */ | |
1337 | newvl = xmalloc (sizeof (struct vlist)); | |
1338 | newvl->next = *(varobj_table + index); | |
1339 | newvl->var = var; | |
1340 | *(varobj_table + index) = newvl; | |
1341 | ||
1342 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1343 | if (is_root_p (var)) |
8b93c638 JM |
1344 | { |
1345 | /* Add to list of root variables */ | |
1346 | if (rootlist == NULL) | |
1347 | var->root->next = NULL; | |
1348 | else | |
1349 | var->root->next = rootlist; | |
1350 | rootlist = var->root; | |
1351 | rootcount++; | |
1352 | } | |
1353 | ||
1354 | return 1; /* OK */ | |
1355 | } | |
1356 | ||
1357 | /* Unistall the object VAR. */ | |
1358 | static void | |
fba45db2 | 1359 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1360 | { |
1361 | struct vlist *cv; | |
1362 | struct vlist *prev; | |
1363 | struct varobj_root *cr; | |
1364 | struct varobj_root *prer; | |
1365 | const char *chp; | |
1366 | unsigned int index = 0; | |
1367 | unsigned int i = 1; | |
1368 | ||
1369 | /* Remove varobj from hash table */ | |
1370 | for (chp = var->obj_name; *chp; chp++) | |
1371 | { | |
1372 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1373 | } | |
1374 | ||
1375 | cv = *(varobj_table + index); | |
1376 | prev = NULL; | |
1377 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1378 | { | |
1379 | prev = cv; | |
1380 | cv = cv->next; | |
1381 | } | |
1382 | ||
1383 | if (varobjdebug) | |
1384 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1385 | ||
1386 | if (cv == NULL) | |
1387 | { | |
72330bd6 AC |
1388 | warning |
1389 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1390 | var->obj_name); | |
8b93c638 JM |
1391 | return; |
1392 | } | |
1393 | ||
1394 | if (prev == NULL) | |
1395 | *(varobj_table + index) = cv->next; | |
1396 | else | |
1397 | prev->next = cv->next; | |
1398 | ||
b8c9b27d | 1399 | xfree (cv); |
8b93c638 JM |
1400 | |
1401 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1402 | if (is_root_p (var)) |
8b93c638 JM |
1403 | { |
1404 | /* Remove from list of root variables */ | |
1405 | if (rootlist == var->root) | |
1406 | rootlist = var->root->next; | |
1407 | else | |
1408 | { | |
1409 | prer = NULL; | |
1410 | cr = rootlist; | |
1411 | while ((cr != NULL) && (cr->rootvar != var)) | |
1412 | { | |
1413 | prer = cr; | |
1414 | cr = cr->next; | |
1415 | } | |
1416 | if (cr == NULL) | |
1417 | { | |
72330bd6 AC |
1418 | warning |
1419 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1420 | var->obj_name); | |
8b93c638 JM |
1421 | return; |
1422 | } | |
1423 | if (prer == NULL) | |
1424 | rootlist = NULL; | |
1425 | else | |
1426 | prer->next = cr->next; | |
1427 | } | |
1428 | rootcount--; | |
1429 | } | |
1430 | ||
1431 | } | |
1432 | ||
8b93c638 JM |
1433 | /* Create and install a child of the parent of the given name */ |
1434 | static struct varobj * | |
fba45db2 | 1435 | create_child (struct varobj *parent, int index, char *name) |
8b93c638 JM |
1436 | { |
1437 | struct varobj *child; | |
1438 | char *childs_name; | |
acd65feb | 1439 | struct value *value; |
8b93c638 JM |
1440 | |
1441 | child = new_variable (); | |
1442 | ||
1443 | /* name is allocated by name_of_child */ | |
1444 | child->name = name; | |
1445 | child->index = index; | |
acd65feb | 1446 | value = value_of_child (parent, index); |
8b93c638 JM |
1447 | child->parent = parent; |
1448 | child->root = parent->root; | |
b435e160 | 1449 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1450 | child->obj_name = childs_name; |
1451 | install_variable (child); | |
1452 | ||
acd65feb VP |
1453 | /* Compute the type of the child. Must do this before |
1454 | calling install_new_value. */ | |
1455 | if (value != NULL) | |
1456 | /* If the child had no evaluation errors, var->value | |
1457 | will be non-NULL and contain a valid type. */ | |
1458 | child->type = value_type (value); | |
1459 | else | |
1460 | /* Otherwise, we must compute the type. */ | |
1461 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1462 | child->index); | |
1463 | install_new_value (child, value, 1); | |
1464 | ||
8b93c638 JM |
1465 | return child; |
1466 | } | |
8b93c638 JM |
1467 | \f |
1468 | ||
1469 | /* | |
1470 | * Miscellaneous utility functions. | |
1471 | */ | |
1472 | ||
1473 | /* Allocate memory and initialize a new variable */ | |
1474 | static struct varobj * | |
1475 | new_variable (void) | |
1476 | { | |
1477 | struct varobj *var; | |
1478 | ||
1479 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1480 | var->name = NULL; | |
02142340 | 1481 | var->path_expr = NULL; |
8b93c638 JM |
1482 | var->obj_name = NULL; |
1483 | var->index = -1; | |
1484 | var->type = NULL; | |
1485 | var->value = NULL; | |
8b93c638 JM |
1486 | var->num_children = -1; |
1487 | var->parent = NULL; | |
1488 | var->children = NULL; | |
1489 | var->format = 0; | |
1490 | var->root = NULL; | |
fb9b6b35 | 1491 | var->updated = 0; |
85265413 | 1492 | var->print_value = NULL; |
25d5ea92 VP |
1493 | var->frozen = 0; |
1494 | var->not_fetched = 0; | |
8b93c638 JM |
1495 | |
1496 | return var; | |
1497 | } | |
1498 | ||
1499 | /* Allocate memory and initialize a new root variable */ | |
1500 | static struct varobj * | |
1501 | new_root_variable (void) | |
1502 | { | |
1503 | struct varobj *var = new_variable (); | |
1504 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1505 | var->root->lang = NULL; | |
1506 | var->root->exp = NULL; | |
1507 | var->root->valid_block = NULL; | |
7a424e99 | 1508 | var->root->frame = null_frame_id; |
73a93a32 | 1509 | var->root->use_selected_frame = 0; |
8b93c638 | 1510 | var->root->rootvar = NULL; |
8756216b | 1511 | var->root->is_valid = 1; |
8b93c638 JM |
1512 | |
1513 | return var; | |
1514 | } | |
1515 | ||
1516 | /* Free any allocated memory associated with VAR. */ | |
1517 | static void | |
fba45db2 | 1518 | free_variable (struct varobj *var) |
8b93c638 JM |
1519 | { |
1520 | /* Free the expression if this is a root variable. */ | |
b2c2bd75 | 1521 | if (is_root_p (var)) |
8b93c638 | 1522 | { |
96c1eda2 | 1523 | free_current_contents (&var->root->exp); |
8038e1e2 | 1524 | xfree (var->root); |
8b93c638 JM |
1525 | } |
1526 | ||
8038e1e2 AC |
1527 | xfree (var->name); |
1528 | xfree (var->obj_name); | |
85265413 | 1529 | xfree (var->print_value); |
02142340 | 1530 | xfree (var->path_expr); |
8038e1e2 | 1531 | xfree (var); |
8b93c638 JM |
1532 | } |
1533 | ||
74b7792f AC |
1534 | static void |
1535 | do_free_variable_cleanup (void *var) | |
1536 | { | |
1537 | free_variable (var); | |
1538 | } | |
1539 | ||
1540 | static struct cleanup * | |
1541 | make_cleanup_free_variable (struct varobj *var) | |
1542 | { | |
1543 | return make_cleanup (do_free_variable_cleanup, var); | |
1544 | } | |
1545 | ||
6766a268 DJ |
1546 | /* This returns the type of the variable. It also skips past typedefs |
1547 | to return the real type of the variable. | |
94b66fa7 KS |
1548 | |
1549 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1550 | except within get_target_type and get_type. */ | |
8b93c638 | 1551 | static struct type * |
fba45db2 | 1552 | get_type (struct varobj *var) |
8b93c638 JM |
1553 | { |
1554 | struct type *type; | |
1555 | type = var->type; | |
1556 | ||
6766a268 DJ |
1557 | if (type != NULL) |
1558 | type = check_typedef (type); | |
8b93c638 JM |
1559 | |
1560 | return type; | |
1561 | } | |
1562 | ||
6e2a9270 VP |
1563 | /* Return the type of the value that's stored in VAR, |
1564 | or that would have being stored there if the | |
1565 | value were accessible. | |
1566 | ||
1567 | This differs from VAR->type in that VAR->type is always | |
1568 | the true type of the expession in the source language. | |
1569 | The return value of this function is the type we're | |
1570 | actually storing in varobj, and using for displaying | |
1571 | the values and for comparing previous and new values. | |
1572 | ||
1573 | For example, top-level references are always stripped. */ | |
1574 | static struct type * | |
1575 | get_value_type (struct varobj *var) | |
1576 | { | |
1577 | struct type *type; | |
1578 | ||
1579 | if (var->value) | |
1580 | type = value_type (var->value); | |
1581 | else | |
1582 | type = var->type; | |
1583 | ||
1584 | type = check_typedef (type); | |
1585 | ||
1586 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1587 | type = get_target_type (type); | |
1588 | ||
1589 | type = check_typedef (type); | |
1590 | ||
1591 | return type; | |
1592 | } | |
1593 | ||
8b93c638 | 1594 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
1595 | past typedefs, just like get_type (). |
1596 | ||
1597 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1598 | except within get_target_type and get_type. */ | |
8b93c638 | 1599 | static struct type * |
fba45db2 | 1600 | get_target_type (struct type *type) |
8b93c638 JM |
1601 | { |
1602 | if (type != NULL) | |
1603 | { | |
1604 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1605 | if (type != NULL) |
1606 | type = check_typedef (type); | |
8b93c638 JM |
1607 | } |
1608 | ||
1609 | return type; | |
1610 | } | |
1611 | ||
1612 | /* What is the default display for this variable? We assume that | |
1613 | everything is "natural". Any exceptions? */ | |
1614 | static enum varobj_display_formats | |
fba45db2 | 1615 | variable_default_display (struct varobj *var) |
8b93c638 JM |
1616 | { |
1617 | return FORMAT_NATURAL; | |
1618 | } | |
1619 | ||
8b93c638 JM |
1620 | /* FIXME: The following should be generic for any pointer */ |
1621 | static void | |
fba45db2 | 1622 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
1623 | { |
1624 | struct cpstack *s; | |
1625 | ||
1626 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1627 | s->name = name; | |
1628 | s->next = *pstack; | |
1629 | *pstack = s; | |
1630 | } | |
1631 | ||
1632 | /* FIXME: The following should be generic for any pointer */ | |
1633 | static char * | |
fba45db2 | 1634 | cppop (struct cpstack **pstack) |
8b93c638 JM |
1635 | { |
1636 | struct cpstack *s; | |
1637 | char *v; | |
1638 | ||
1639 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1640 | return NULL; | |
1641 | ||
1642 | s = *pstack; | |
1643 | v = s->name; | |
1644 | *pstack = (*pstack)->next; | |
b8c9b27d | 1645 | xfree (s); |
8b93c638 JM |
1646 | |
1647 | return v; | |
1648 | } | |
1649 | \f | |
1650 | /* | |
1651 | * Language-dependencies | |
1652 | */ | |
1653 | ||
1654 | /* Common entry points */ | |
1655 | ||
1656 | /* Get the language of variable VAR. */ | |
1657 | static enum varobj_languages | |
fba45db2 | 1658 | variable_language (struct varobj *var) |
8b93c638 JM |
1659 | { |
1660 | enum varobj_languages lang; | |
1661 | ||
1662 | switch (var->root->exp->language_defn->la_language) | |
1663 | { | |
1664 | default: | |
1665 | case language_c: | |
1666 | lang = vlang_c; | |
1667 | break; | |
1668 | case language_cplus: | |
1669 | lang = vlang_cplus; | |
1670 | break; | |
1671 | case language_java: | |
1672 | lang = vlang_java; | |
1673 | break; | |
1674 | } | |
1675 | ||
1676 | return lang; | |
1677 | } | |
1678 | ||
1679 | /* Return the number of children for a given variable. | |
1680 | The result of this function is defined by the language | |
1681 | implementation. The number of children returned by this function | |
1682 | is the number of children that the user will see in the variable | |
1683 | display. */ | |
1684 | static int | |
fba45db2 | 1685 | number_of_children (struct varobj *var) |
8b93c638 JM |
1686 | { |
1687 | return (*var->root->lang->number_of_children) (var);; | |
1688 | } | |
1689 | ||
1690 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1691 | static char * | |
fba45db2 | 1692 | name_of_variable (struct varobj *var) |
8b93c638 JM |
1693 | { |
1694 | return (*var->root->lang->name_of_variable) (var); | |
1695 | } | |
1696 | ||
1697 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1698 | static char * | |
fba45db2 | 1699 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
1700 | { |
1701 | return (*var->root->lang->name_of_child) (var, index); | |
1702 | } | |
1703 | ||
30b28db1 | 1704 | /* What is the ``struct value *'' of the root variable VAR? |
73a93a32 JI |
1705 | TYPE_CHANGED controls what to do if the type of a |
1706 | use_selected_frame = 1 variable changes. On input, | |
1707 | TYPE_CHANGED = 1 means discard the old varobj, and replace | |
1708 | it with this one. TYPE_CHANGED = 0 means leave it around. | |
1709 | NB: In both cases, var_handle will point to the new varobj, | |
1710 | so if you use TYPE_CHANGED = 0, you will have to stash the | |
1711 | old varobj pointer away somewhere before calling this. | |
1712 | On return, TYPE_CHANGED will be 1 if the type has changed, and | |
1713 | 0 otherwise. */ | |
30b28db1 | 1714 | static struct value * |
fba45db2 | 1715 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 1716 | { |
73a93a32 JI |
1717 | struct varobj *var; |
1718 | ||
1719 | if (var_handle == NULL) | |
1720 | return NULL; | |
1721 | ||
1722 | var = *var_handle; | |
1723 | ||
1724 | /* This should really be an exception, since this should | |
1725 | only get called with a root variable. */ | |
1726 | ||
b2c2bd75 | 1727 | if (!is_root_p (var)) |
73a93a32 JI |
1728 | return NULL; |
1729 | ||
1730 | if (var->root->use_selected_frame) | |
1731 | { | |
1732 | struct varobj *tmp_var; | |
1733 | char *old_type, *new_type; | |
6225abfa | 1734 | |
73a93a32 JI |
1735 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
1736 | USE_SELECTED_FRAME); | |
1737 | if (tmp_var == NULL) | |
1738 | { | |
1739 | return NULL; | |
1740 | } | |
6225abfa | 1741 | old_type = varobj_get_type (var); |
73a93a32 | 1742 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 1743 | if (strcmp (old_type, new_type) == 0) |
73a93a32 JI |
1744 | { |
1745 | varobj_delete (tmp_var, NULL, 0); | |
1746 | *type_changed = 0; | |
1747 | } | |
1748 | else | |
1749 | { | |
1750 | if (*type_changed) | |
1751 | { | |
72330bd6 | 1752 | tmp_var->obj_name = |
73a93a32 | 1753 | savestring (var->obj_name, strlen (var->obj_name)); |
f7635dd9 | 1754 | varobj_delete (var, NULL, 0); |
73a93a32 JI |
1755 | } |
1756 | else | |
1757 | { | |
72330bd6 | 1758 | tmp_var->obj_name = varobj_gen_name (); |
73a93a32 JI |
1759 | } |
1760 | install_variable (tmp_var); | |
1761 | *var_handle = tmp_var; | |
705da579 | 1762 | var = *var_handle; |
73a93a32 JI |
1763 | *type_changed = 1; |
1764 | } | |
74dddad3 MS |
1765 | xfree (old_type); |
1766 | xfree (new_type); | |
73a93a32 JI |
1767 | } |
1768 | else | |
1769 | { | |
1770 | *type_changed = 0; | |
1771 | } | |
1772 | ||
1773 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1774 | } |
1775 | ||
30b28db1 AC |
1776 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
1777 | static struct value * | |
fba45db2 | 1778 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 1779 | { |
30b28db1 | 1780 | struct value *value; |
8b93c638 JM |
1781 | |
1782 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1783 | ||
8b93c638 JM |
1784 | return value; |
1785 | } | |
1786 | ||
8b93c638 JM |
1787 | /* GDB already has a command called "value_of_variable". Sigh. */ |
1788 | static char * | |
fba45db2 | 1789 | my_value_of_variable (struct varobj *var) |
8b93c638 | 1790 | { |
8756216b DP |
1791 | if (var->root->is_valid) |
1792 | return (*var->root->lang->value_of_variable) (var); | |
1793 | else | |
1794 | return NULL; | |
8b93c638 JM |
1795 | } |
1796 | ||
85265413 NR |
1797 | static char * |
1798 | value_get_print_value (struct value *value, enum varobj_display_formats format) | |
1799 | { | |
1800 | long dummy; | |
57e66780 DJ |
1801 | struct ui_file *stb; |
1802 | struct cleanup *old_chain; | |
85265413 | 1803 | char *thevalue; |
57e66780 DJ |
1804 | |
1805 | if (value == NULL) | |
1806 | return NULL; | |
1807 | ||
1808 | stb = mem_fileopen (); | |
1809 | old_chain = make_cleanup_ui_file_delete (stb); | |
1810 | ||
85265413 NR |
1811 | common_val_print (value, stb, format_code[(int) format], 1, 0, 0); |
1812 | thevalue = ui_file_xstrdup (stb, &dummy); | |
57e66780 | 1813 | |
85265413 NR |
1814 | do_cleanups (old_chain); |
1815 | return thevalue; | |
1816 | } | |
1817 | ||
340a7723 NR |
1818 | int |
1819 | varobj_editable_p (struct varobj *var) | |
1820 | { | |
1821 | struct type *type; | |
1822 | struct value *value; | |
1823 | ||
1824 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
1825 | return 0; | |
1826 | ||
1827 | type = get_value_type (var); | |
1828 | ||
1829 | switch (TYPE_CODE (type)) | |
1830 | { | |
1831 | case TYPE_CODE_STRUCT: | |
1832 | case TYPE_CODE_UNION: | |
1833 | case TYPE_CODE_ARRAY: | |
1834 | case TYPE_CODE_FUNC: | |
1835 | case TYPE_CODE_METHOD: | |
1836 | return 0; | |
1837 | break; | |
1838 | ||
1839 | default: | |
1840 | return 1; | |
1841 | break; | |
1842 | } | |
1843 | } | |
1844 | ||
acd65feb VP |
1845 | /* Return non-zero if changes in value of VAR |
1846 | must be detected and reported by -var-update. | |
1847 | Return zero is -var-update should never report | |
1848 | changes of such values. This makes sense for structures | |
1849 | (since the changes in children values will be reported separately), | |
1850 | or for artifical objects (like 'public' pseudo-field in C++). | |
1851 | ||
1852 | Return value of 0 means that gdb need not call value_fetch_lazy | |
1853 | for the value of this variable object. */ | |
8b93c638 | 1854 | static int |
b2c2bd75 | 1855 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
1856 | { |
1857 | int r; | |
1858 | struct type *type; | |
1859 | ||
1860 | if (CPLUS_FAKE_CHILD (var)) | |
1861 | return 0; | |
1862 | ||
6e2a9270 | 1863 | type = get_value_type (var); |
8b93c638 JM |
1864 | |
1865 | switch (TYPE_CODE (type)) | |
1866 | { | |
72330bd6 AC |
1867 | case TYPE_CODE_STRUCT: |
1868 | case TYPE_CODE_UNION: | |
1869 | case TYPE_CODE_ARRAY: | |
1870 | r = 0; | |
1871 | break; | |
8b93c638 | 1872 | |
72330bd6 AC |
1873 | default: |
1874 | r = 1; | |
8b93c638 JM |
1875 | } |
1876 | ||
1877 | return r; | |
1878 | } | |
1879 | ||
2024f65a VP |
1880 | /* Given the value and the type of a variable object, |
1881 | adjust the value and type to those necessary | |
1882 | for getting children of the variable object. | |
1883 | This includes dereferencing top-level references | |
1884 | to all types and dereferencing pointers to | |
1885 | structures. | |
1886 | ||
1887 | Both TYPE and *TYPE should be non-null. VALUE | |
1888 | can be null if we want to only translate type. | |
1889 | *VALUE can be null as well -- if the parent | |
02142340 VP |
1890 | value is not known. |
1891 | ||
1892 | If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1 | |
1893 | depending on whether pointer was deferenced | |
1894 | in this function. */ | |
2024f65a VP |
1895 | static void |
1896 | adjust_value_for_child_access (struct value **value, | |
02142340 VP |
1897 | struct type **type, |
1898 | int *was_ptr) | |
2024f65a VP |
1899 | { |
1900 | gdb_assert (type && *type); | |
1901 | ||
02142340 VP |
1902 | if (was_ptr) |
1903 | *was_ptr = 0; | |
1904 | ||
2024f65a VP |
1905 | *type = check_typedef (*type); |
1906 | ||
1907 | /* The type of value stored in varobj, that is passed | |
1908 | to us, is already supposed to be | |
1909 | reference-stripped. */ | |
1910 | ||
1911 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
1912 | ||
1913 | /* Pointers to structures are treated just like | |
1914 | structures when accessing children. Don't | |
1915 | dererences pointers to other types. */ | |
1916 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
1917 | { | |
1918 | struct type *target_type = get_target_type (*type); | |
1919 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
1920 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
1921 | { | |
1922 | if (value && *value) | |
1923 | gdb_value_ind (*value, value); | |
1924 | *type = target_type; | |
02142340 VP |
1925 | if (was_ptr) |
1926 | *was_ptr = 1; | |
2024f65a VP |
1927 | } |
1928 | } | |
1929 | ||
1930 | /* The 'get_target_type' function calls check_typedef on | |
1931 | result, so we can immediately check type code. No | |
1932 | need to call check_typedef here. */ | |
1933 | } | |
1934 | ||
8b93c638 JM |
1935 | /* C */ |
1936 | static int | |
fba45db2 | 1937 | c_number_of_children (struct varobj *var) |
8b93c638 | 1938 | { |
2024f65a VP |
1939 | struct type *type = get_value_type (var); |
1940 | int children = 0; | |
8b93c638 | 1941 | struct type *target; |
8b93c638 | 1942 | |
02142340 | 1943 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 | 1944 | target = get_target_type (type); |
8b93c638 JM |
1945 | |
1946 | switch (TYPE_CODE (type)) | |
1947 | { | |
1948 | case TYPE_CODE_ARRAY: | |
1949 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
72330bd6 | 1950 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) |
8b93c638 JM |
1951 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
1952 | else | |
74a44383 DJ |
1953 | /* If we don't know how many elements there are, don't display |
1954 | any. */ | |
1955 | children = 0; | |
8b93c638 JM |
1956 | break; |
1957 | ||
1958 | case TYPE_CODE_STRUCT: | |
1959 | case TYPE_CODE_UNION: | |
1960 | children = TYPE_NFIELDS (type); | |
1961 | break; | |
1962 | ||
1963 | case TYPE_CODE_PTR: | |
2024f65a VP |
1964 | /* The type here is a pointer to non-struct. Typically, pointers |
1965 | have one child, except for function ptrs, which have no children, | |
1966 | and except for void*, as we don't know what to show. | |
1967 | ||
0755e6c1 FN |
1968 | We can show char* so we allow it to be dereferenced. If you decide |
1969 | to test for it, please mind that a little magic is necessary to | |
1970 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
1971 | TYPE_NAME == "char" */ | |
2024f65a VP |
1972 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
1973 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
1974 | children = 0; | |
1975 | else | |
1976 | children = 1; | |
8b93c638 JM |
1977 | break; |
1978 | ||
1979 | default: | |
1980 | /* Other types have no children */ | |
1981 | break; | |
1982 | } | |
1983 | ||
1984 | return children; | |
1985 | } | |
1986 | ||
1987 | static char * | |
fba45db2 | 1988 | c_name_of_variable (struct varobj *parent) |
8b93c638 JM |
1989 | { |
1990 | return savestring (parent->name, strlen (parent->name)); | |
1991 | } | |
1992 | ||
bbec2603 VP |
1993 | /* Return the value of element TYPE_INDEX of a structure |
1994 | value VALUE. VALUE's type should be a structure, | |
1995 | or union, or a typedef to struct/union. | |
1996 | ||
1997 | Returns NULL if getting the value fails. Never throws. */ | |
1998 | static struct value * | |
1999 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 2000 | { |
bbec2603 VP |
2001 | struct value *result = NULL; |
2002 | volatile struct gdb_exception e; | |
8b93c638 | 2003 | |
bbec2603 VP |
2004 | struct type *type = value_type (value); |
2005 | type = check_typedef (type); | |
2006 | ||
2007 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2008 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 2009 | |
bbec2603 VP |
2010 | TRY_CATCH (e, RETURN_MASK_ERROR) |
2011 | { | |
2012 | if (TYPE_FIELD_STATIC (type, type_index)) | |
2013 | result = value_static_field (type, type_index); | |
2014 | else | |
2015 | result = value_primitive_field (value, 0, type_index, type); | |
2016 | } | |
2017 | if (e.reason < 0) | |
2018 | { | |
2019 | return NULL; | |
2020 | } | |
2021 | else | |
2022 | { | |
2023 | return result; | |
2024 | } | |
2025 | } | |
2026 | ||
2027 | /* Obtain the information about child INDEX of the variable | |
2028 | object PARENT. | |
2029 | If CNAME is not null, sets *CNAME to the name of the child relative | |
2030 | to the parent. | |
2031 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
2032 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
2033 | ||
2034 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
2035 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
2036 | to NULL. */ | |
2037 | static void | |
2038 | c_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2039 | char **cname, struct value **cvalue, struct type **ctype, |
2040 | char **cfull_expression) | |
bbec2603 VP |
2041 | { |
2042 | struct value *value = parent->value; | |
2024f65a | 2043 | struct type *type = get_value_type (parent); |
02142340 VP |
2044 | char *parent_expression = NULL; |
2045 | int was_ptr; | |
bbec2603 VP |
2046 | |
2047 | if (cname) | |
2048 | *cname = NULL; | |
2049 | if (cvalue) | |
2050 | *cvalue = NULL; | |
2051 | if (ctype) | |
2052 | *ctype = NULL; | |
02142340 VP |
2053 | if (cfull_expression) |
2054 | { | |
2055 | *cfull_expression = NULL; | |
2056 | parent_expression = varobj_get_path_expr (parent); | |
2057 | } | |
2058 | adjust_value_for_child_access (&value, &type, &was_ptr); | |
bbec2603 | 2059 | |
8b93c638 JM |
2060 | switch (TYPE_CODE (type)) |
2061 | { | |
2062 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
2063 | if (cname) |
2064 | *cname = xstrprintf ("%d", index | |
2065 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2066 | ||
2067 | if (cvalue && value) | |
2068 | { | |
2069 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
2070 | struct value *indval = | |
2071 | value_from_longest (builtin_type_int, (LONGEST) real_index); | |
2072 | gdb_value_subscript (value, indval, cvalue); | |
2073 | } | |
2074 | ||
2075 | if (ctype) | |
2076 | *ctype = get_target_type (type); | |
2077 | ||
02142340 VP |
2078 | if (cfull_expression) |
2079 | *cfull_expression = xstrprintf ("(%s)[%d]", parent_expression, | |
2080 | index | |
2081 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2082 | ||
2083 | ||
8b93c638 JM |
2084 | break; |
2085 | ||
2086 | case TYPE_CODE_STRUCT: | |
2087 | case TYPE_CODE_UNION: | |
bbec2603 VP |
2088 | if (cname) |
2089 | { | |
2090 | char *string = TYPE_FIELD_NAME (type, index); | |
2091 | *cname = savestring (string, strlen (string)); | |
2092 | } | |
2093 | ||
2094 | if (cvalue && value) | |
2095 | { | |
2096 | /* For C, varobj index is the same as type index. */ | |
2097 | *cvalue = value_struct_element_index (value, index); | |
2098 | } | |
2099 | ||
2100 | if (ctype) | |
2101 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2102 | ||
02142340 VP |
2103 | if (cfull_expression) |
2104 | { | |
2105 | char *join = was_ptr ? "->" : "."; | |
2106 | *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, join, | |
2107 | TYPE_FIELD_NAME (type, index)); | |
2108 | } | |
2109 | ||
8b93c638 JM |
2110 | break; |
2111 | ||
2112 | case TYPE_CODE_PTR: | |
bbec2603 VP |
2113 | if (cname) |
2114 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 2115 | |
bbec2603 VP |
2116 | if (cvalue && value) |
2117 | gdb_value_ind (value, cvalue); | |
2118 | ||
2024f65a VP |
2119 | /* Don't use get_target_type because it calls |
2120 | check_typedef and here, we want to show the true | |
2121 | declared type of the variable. */ | |
bbec2603 | 2122 | if (ctype) |
2024f65a | 2123 | *ctype = TYPE_TARGET_TYPE (type); |
02142340 VP |
2124 | |
2125 | if (cfull_expression) | |
2126 | *cfull_expression = xstrprintf ("*(%s)", parent_expression); | |
bbec2603 | 2127 | |
8b93c638 JM |
2128 | break; |
2129 | ||
2130 | default: | |
2131 | /* This should not happen */ | |
bbec2603 VP |
2132 | if (cname) |
2133 | *cname = xstrdup ("???"); | |
02142340 VP |
2134 | if (cfull_expression) |
2135 | *cfull_expression = xstrdup ("???"); | |
bbec2603 | 2136 | /* Don't set value and type, we don't know then. */ |
8b93c638 | 2137 | } |
bbec2603 | 2138 | } |
8b93c638 | 2139 | |
bbec2603 VP |
2140 | static char * |
2141 | c_name_of_child (struct varobj *parent, int index) | |
2142 | { | |
2143 | char *name; | |
02142340 | 2144 | c_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2145 | return name; |
2146 | } | |
2147 | ||
02142340 VP |
2148 | static char * |
2149 | c_path_expr_of_child (struct varobj *child) | |
2150 | { | |
2151 | c_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2152 | &child->path_expr); | |
2153 | return child->path_expr; | |
2154 | } | |
2155 | ||
30b28db1 | 2156 | static struct value * |
fba45db2 | 2157 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 2158 | { |
5e572bb4 | 2159 | struct value *new_val = NULL; |
73a93a32 | 2160 | struct varobj *var = *var_handle; |
8b93c638 JM |
2161 | struct frame_info *fi; |
2162 | int within_scope; | |
2163 | ||
73a93a32 | 2164 | /* Only root variables can be updated... */ |
b2c2bd75 | 2165 | if (!is_root_p (var)) |
73a93a32 JI |
2166 | /* Not a root var */ |
2167 | return NULL; | |
2168 | ||
72330bd6 | 2169 | |
8b93c638 | 2170 | /* Determine whether the variable is still around. */ |
b20d8971 | 2171 | if (var->root->valid_block == NULL || var->root->use_selected_frame) |
8b93c638 JM |
2172 | within_scope = 1; |
2173 | else | |
2174 | { | |
e64d9b3d | 2175 | fi = frame_find_by_id (var->root->frame); |
8b93c638 JM |
2176 | within_scope = fi != NULL; |
2177 | /* FIXME: select_frame could fail */ | |
d2353924 NR |
2178 | if (fi) |
2179 | { | |
2180 | CORE_ADDR pc = get_frame_pc (fi); | |
2181 | if (pc < BLOCK_START (var->root->valid_block) || | |
2182 | pc >= BLOCK_END (var->root->valid_block)) | |
2183 | within_scope = 0; | |
2d43bda2 NR |
2184 | else |
2185 | select_frame (fi); | |
d2353924 | 2186 | } |
8b93c638 | 2187 | } |
72330bd6 | 2188 | |
8b93c638 JM |
2189 | if (within_scope) |
2190 | { | |
73a93a32 | 2191 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
2192 | expression fails we want to just return NULL. */ |
2193 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
2194 | return new_val; |
2195 | } | |
2196 | ||
2197 | return NULL; | |
2198 | } | |
2199 | ||
30b28db1 | 2200 | static struct value * |
fba45db2 | 2201 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2202 | { |
bbec2603 | 2203 | struct value *value = NULL; |
02142340 | 2204 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2205 | |
2206 | return value; | |
2207 | } | |
2208 | ||
2209 | static struct type * | |
fba45db2 | 2210 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2211 | { |
bbec2603 | 2212 | struct type *type = NULL; |
02142340 | 2213 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2214 | return type; |
2215 | } | |
2216 | ||
8b93c638 | 2217 | static char * |
fba45db2 | 2218 | c_value_of_variable (struct varobj *var) |
8b93c638 | 2219 | { |
14b3d9c9 JB |
2220 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2221 | it will print out its children instead of "{...}". So we need to | |
2222 | catch that case explicitly. */ | |
2223 | struct type *type = get_type (var); | |
e64d9b3d | 2224 | |
14b3d9c9 JB |
2225 | /* Strip top-level references. */ |
2226 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2227 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2228 | ||
2229 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2230 | { |
2231 | case TYPE_CODE_STRUCT: | |
2232 | case TYPE_CODE_UNION: | |
2233 | return xstrdup ("{...}"); | |
2234 | /* break; */ | |
2235 | ||
2236 | case TYPE_CODE_ARRAY: | |
2237 | { | |
e64d9b3d | 2238 | char *number; |
b435e160 | 2239 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2240 | return (number); |
8b93c638 JM |
2241 | } |
2242 | /* break; */ | |
2243 | ||
2244 | default: | |
2245 | { | |
575bbeb6 KS |
2246 | if (var->value == NULL) |
2247 | { | |
2248 | /* This can happen if we attempt to get the value of a struct | |
2249 | member when the parent is an invalid pointer. This is an | |
2250 | error condition, so we should tell the caller. */ | |
2251 | return NULL; | |
2252 | } | |
2253 | else | |
2254 | { | |
25d5ea92 VP |
2255 | if (var->not_fetched && value_lazy (var->value)) |
2256 | /* Frozen variable and no value yet. We don't | |
2257 | implicitly fetch the value. MI response will | |
2258 | use empty string for the value, which is OK. */ | |
2259 | return NULL; | |
2260 | ||
b2c2bd75 | 2261 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2262 | gdb_assert (!value_lazy (var->value)); |
85265413 NR |
2263 | return value_get_print_value (var->value, var->format); |
2264 | } | |
e64d9b3d | 2265 | } |
8b93c638 JM |
2266 | } |
2267 | } | |
2268 | \f | |
2269 | ||
2270 | /* C++ */ | |
2271 | ||
2272 | static int | |
fba45db2 | 2273 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2274 | { |
2275 | struct type *type; | |
2276 | int children, dont_know; | |
2277 | ||
2278 | dont_know = 1; | |
2279 | children = 0; | |
2280 | ||
2281 | if (!CPLUS_FAKE_CHILD (var)) | |
2282 | { | |
2024f65a | 2283 | type = get_value_type (var); |
02142340 | 2284 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2285 | |
2286 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2287 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2288 | { |
2289 | int kids[3]; | |
2290 | ||
2291 | cplus_class_num_children (type, kids); | |
2292 | if (kids[v_public] != 0) | |
2293 | children++; | |
2294 | if (kids[v_private] != 0) | |
2295 | children++; | |
2296 | if (kids[v_protected] != 0) | |
2297 | children++; | |
2298 | ||
2299 | /* Add any baseclasses */ | |
2300 | children += TYPE_N_BASECLASSES (type); | |
2301 | dont_know = 0; | |
2302 | ||
2303 | /* FIXME: save children in var */ | |
2304 | } | |
2305 | } | |
2306 | else | |
2307 | { | |
2308 | int kids[3]; | |
2309 | ||
2024f65a | 2310 | type = get_value_type (var->parent); |
02142340 | 2311 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2312 | |
2313 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2314 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2315 | children = kids[v_public]; |
6e382aa3 | 2316 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2317 | children = kids[v_private]; |
2318 | else | |
2319 | children = kids[v_protected]; | |
2320 | dont_know = 0; | |
2321 | } | |
2322 | ||
2323 | if (dont_know) | |
2324 | children = c_number_of_children (var); | |
2325 | ||
2326 | return children; | |
2327 | } | |
2328 | ||
2329 | /* Compute # of public, private, and protected variables in this class. | |
2330 | That means we need to descend into all baseclasses and find out | |
2331 | how many are there, too. */ | |
2332 | static void | |
1669605f | 2333 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2334 | { |
2335 | int i; | |
2336 | ||
2337 | children[v_public] = 0; | |
2338 | children[v_private] = 0; | |
2339 | children[v_protected] = 0; | |
2340 | ||
2341 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2342 | { | |
2343 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2344 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2345 | continue; |
2346 | ||
2347 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2348 | children[v_protected]++; | |
2349 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2350 | children[v_private]++; | |
2351 | else | |
2352 | children[v_public]++; | |
2353 | } | |
2354 | } | |
2355 | ||
2356 | static char * | |
fba45db2 | 2357 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2358 | { |
2359 | return c_name_of_variable (parent); | |
2360 | } | |
2361 | ||
2024f65a VP |
2362 | enum accessibility { private_field, protected_field, public_field }; |
2363 | ||
2364 | /* Check if field INDEX of TYPE has the specified accessibility. | |
2365 | Return 0 if so and 1 otherwise. */ | |
2366 | static int | |
2367 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 2368 | { |
2024f65a VP |
2369 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
2370 | return 1; | |
2371 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
2372 | return 1; | |
2373 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
2374 | && !TYPE_FIELD_PROTECTED (type, index)) | |
2375 | return 1; | |
2376 | else | |
2377 | return 0; | |
2378 | } | |
2379 | ||
2380 | static void | |
2381 | cplus_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2382 | char **cname, struct value **cvalue, struct type **ctype, |
2383 | char **cfull_expression) | |
2024f65a | 2384 | { |
348144ba | 2385 | char *name = NULL; |
2024f65a | 2386 | struct value *value; |
8b93c638 | 2387 | struct type *type; |
02142340 VP |
2388 | int was_ptr; |
2389 | char *parent_expression = NULL; | |
8b93c638 | 2390 | |
2024f65a VP |
2391 | if (cname) |
2392 | *cname = NULL; | |
2393 | if (cvalue) | |
2394 | *cvalue = NULL; | |
2395 | if (ctype) | |
2396 | *ctype = NULL; | |
02142340 VP |
2397 | if (cfull_expression) |
2398 | *cfull_expression = NULL; | |
2024f65a | 2399 | |
8b93c638 JM |
2400 | if (CPLUS_FAKE_CHILD (parent)) |
2401 | { | |
2024f65a VP |
2402 | value = parent->parent->value; |
2403 | type = get_value_type (parent->parent); | |
02142340 VP |
2404 | if (cfull_expression) |
2405 | parent_expression = varobj_get_path_expr (parent->parent); | |
8b93c638 JM |
2406 | } |
2407 | else | |
2024f65a VP |
2408 | { |
2409 | value = parent->value; | |
2410 | type = get_value_type (parent); | |
02142340 VP |
2411 | if (cfull_expression) |
2412 | parent_expression = varobj_get_path_expr (parent); | |
2024f65a | 2413 | } |
8b93c638 | 2414 | |
02142340 | 2415 | adjust_value_for_child_access (&value, &type, &was_ptr); |
2024f65a VP |
2416 | |
2417 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2418 | || TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
8b93c638 | 2419 | { |
02142340 | 2420 | char *join = was_ptr ? "->" : "."; |
8b93c638 JM |
2421 | if (CPLUS_FAKE_CHILD (parent)) |
2422 | { | |
6e382aa3 JJ |
2423 | /* The fields of the class type are ordered as they |
2424 | appear in the class. We are given an index for a | |
2425 | particular access control type ("public","protected", | |
2426 | or "private"). We must skip over fields that don't | |
2427 | have the access control we are looking for to properly | |
2428 | find the indexed field. */ | |
2429 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 2430 | enum accessibility acc = public_field; |
6e382aa3 | 2431 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 2432 | acc = private_field; |
6e382aa3 | 2433 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
2434 | acc = protected_field; |
2435 | ||
2436 | while (index >= 0) | |
6e382aa3 | 2437 | { |
2024f65a VP |
2438 | if (TYPE_VPTR_BASETYPE (type) == type |
2439 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2440 | ; /* ignore vptr */ | |
2441 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
2442 | --index; |
2443 | ++type_index; | |
6e382aa3 | 2444 | } |
2024f65a VP |
2445 | --type_index; |
2446 | ||
2447 | if (cname) | |
2448 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
2449 | ||
2450 | if (cvalue && value) | |
2451 | *cvalue = value_struct_element_index (value, type_index); | |
2452 | ||
2453 | if (ctype) | |
2454 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
02142340 VP |
2455 | |
2456 | if (cfull_expression) | |
2457 | *cfull_expression = xstrprintf ("((%s)%s%s)", parent_expression, | |
2458 | join, | |
2459 | TYPE_FIELD_NAME (type, type_index)); | |
2024f65a VP |
2460 | } |
2461 | else if (index < TYPE_N_BASECLASSES (type)) | |
2462 | { | |
2463 | /* This is a baseclass. */ | |
2464 | if (cname) | |
2465 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
2466 | ||
2467 | if (cvalue && value) | |
6e382aa3 | 2468 | { |
2024f65a | 2469 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
02142340 | 2470 | release_value (*cvalue); |
6e382aa3 JJ |
2471 | } |
2472 | ||
2024f65a VP |
2473 | if (ctype) |
2474 | { | |
2475 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2476 | } | |
02142340 VP |
2477 | |
2478 | if (cfull_expression) | |
2479 | { | |
2480 | char *ptr = was_ptr ? "*" : ""; | |
2481 | /* Cast the parent to the base' type. Note that in gdb, | |
2482 | expression like | |
2483 | (Base1)d | |
2484 | will create an lvalue, for all appearences, so we don't | |
2485 | need to use more fancy: | |
2486 | *(Base1*)(&d) | |
2487 | construct. */ | |
2488 | *cfull_expression = xstrprintf ("(%s(%s%s) %s)", | |
2489 | ptr, | |
2490 | TYPE_FIELD_NAME (type, index), | |
2491 | ptr, | |
2492 | parent_expression); | |
2493 | } | |
8b93c638 | 2494 | } |
8b93c638 JM |
2495 | else |
2496 | { | |
348144ba | 2497 | char *access = NULL; |
6e382aa3 | 2498 | int children[3]; |
2024f65a | 2499 | cplus_class_num_children (type, children); |
6e382aa3 | 2500 | |
8b93c638 | 2501 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2502 | only be "public", "private", or "protected" |
2503 | ||
2504 | The special "fake" children are always output by varobj in | |
2505 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2506 | index -= TYPE_N_BASECLASSES (type); |
2507 | switch (index) | |
2508 | { | |
2509 | case 0: | |
6e382aa3 | 2510 | if (children[v_public] > 0) |
2024f65a | 2511 | access = "public"; |
6e382aa3 | 2512 | else if (children[v_private] > 0) |
2024f65a | 2513 | access = "private"; |
6e382aa3 | 2514 | else |
2024f65a | 2515 | access = "protected"; |
6e382aa3 | 2516 | break; |
8b93c638 | 2517 | case 1: |
6e382aa3 | 2518 | if (children[v_public] > 0) |
8b93c638 | 2519 | { |
6e382aa3 | 2520 | if (children[v_private] > 0) |
2024f65a | 2521 | access = "private"; |
6e382aa3 | 2522 | else |
2024f65a | 2523 | access = "protected"; |
8b93c638 | 2524 | } |
6e382aa3 | 2525 | else if (children[v_private] > 0) |
2024f65a | 2526 | access = "protected"; |
6e382aa3 | 2527 | break; |
8b93c638 | 2528 | case 2: |
6e382aa3 | 2529 | /* Must be protected */ |
2024f65a | 2530 | access = "protected"; |
6e382aa3 | 2531 | break; |
8b93c638 JM |
2532 | default: |
2533 | /* error! */ | |
2534 | break; | |
2535 | } | |
348144ba MS |
2536 | |
2537 | gdb_assert (access); | |
2024f65a VP |
2538 | if (cname) |
2539 | *cname = xstrdup (access); | |
8b93c638 | 2540 | |
02142340 | 2541 | /* Value and type and full expression are null here. */ |
2024f65a | 2542 | } |
8b93c638 | 2543 | } |
8b93c638 JM |
2544 | else |
2545 | { | |
02142340 | 2546 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
2024f65a VP |
2547 | } |
2548 | } | |
8b93c638 | 2549 | |
2024f65a VP |
2550 | static char * |
2551 | cplus_name_of_child (struct varobj *parent, int index) | |
2552 | { | |
2553 | char *name = NULL; | |
02142340 | 2554 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2555 | return name; |
2556 | } | |
2557 | ||
02142340 VP |
2558 | static char * |
2559 | cplus_path_expr_of_child (struct varobj *child) | |
2560 | { | |
2561 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2562 | &child->path_expr); | |
2563 | return child->path_expr; | |
2564 | } | |
2565 | ||
30b28db1 | 2566 | static struct value * |
fba45db2 | 2567 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2568 | { |
73a93a32 | 2569 | return c_value_of_root (var_handle); |
8b93c638 JM |
2570 | } |
2571 | ||
30b28db1 | 2572 | static struct value * |
fba45db2 | 2573 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2574 | { |
2024f65a | 2575 | struct value *value = NULL; |
02142340 | 2576 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2577 | return value; |
2578 | } | |
2579 | ||
2580 | static struct type * | |
fba45db2 | 2581 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2582 | { |
2024f65a | 2583 | struct type *type = NULL; |
02142340 | 2584 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2585 | return type; |
2586 | } | |
2587 | ||
8b93c638 | 2588 | static char * |
fba45db2 | 2589 | cplus_value_of_variable (struct varobj *var) |
8b93c638 JM |
2590 | { |
2591 | ||
2592 | /* If we have one of our special types, don't print out | |
2593 | any value. */ | |
2594 | if (CPLUS_FAKE_CHILD (var)) | |
2595 | return xstrdup (""); | |
2596 | ||
2597 | return c_value_of_variable (var); | |
2598 | } | |
2599 | \f | |
2600 | /* Java */ | |
2601 | ||
2602 | static int | |
fba45db2 | 2603 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2604 | { |
2605 | return cplus_number_of_children (var); | |
2606 | } | |
2607 | ||
2608 | static char * | |
fba45db2 | 2609 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2610 | { |
2611 | char *p, *name; | |
2612 | ||
2613 | name = cplus_name_of_variable (parent); | |
2614 | /* If the name has "-" in it, it is because we | |
2615 | needed to escape periods in the name... */ | |
2616 | p = name; | |
2617 | ||
2618 | while (*p != '\000') | |
2619 | { | |
2620 | if (*p == '-') | |
2621 | *p = '.'; | |
2622 | p++; | |
2623 | } | |
2624 | ||
2625 | return name; | |
2626 | } | |
2627 | ||
2628 | static char * | |
fba45db2 | 2629 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2630 | { |
2631 | char *name, *p; | |
2632 | ||
2633 | name = cplus_name_of_child (parent, index); | |
2634 | /* Escape any periods in the name... */ | |
2635 | p = name; | |
2636 | ||
2637 | while (*p != '\000') | |
2638 | { | |
2639 | if (*p == '.') | |
2640 | *p = '-'; | |
2641 | p++; | |
2642 | } | |
2643 | ||
2644 | return name; | |
2645 | } | |
2646 | ||
02142340 VP |
2647 | static char * |
2648 | java_path_expr_of_child (struct varobj *child) | |
2649 | { | |
2650 | return NULL; | |
2651 | } | |
2652 | ||
30b28db1 | 2653 | static struct value * |
fba45db2 | 2654 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2655 | { |
73a93a32 | 2656 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2657 | } |
2658 | ||
30b28db1 | 2659 | static struct value * |
fba45db2 | 2660 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2661 | { |
2662 | return cplus_value_of_child (parent, index); | |
2663 | } | |
2664 | ||
2665 | static struct type * | |
fba45db2 | 2666 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2667 | { |
2668 | return cplus_type_of_child (parent, index); | |
2669 | } | |
2670 | ||
8b93c638 | 2671 | static char * |
fba45db2 | 2672 | java_value_of_variable (struct varobj *var) |
8b93c638 JM |
2673 | { |
2674 | return cplus_value_of_variable (var); | |
2675 | } | |
2676 | \f | |
2677 | extern void _initialize_varobj (void); | |
2678 | void | |
2679 | _initialize_varobj (void) | |
2680 | { | |
2681 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2682 | ||
2683 | varobj_table = xmalloc (sizeof_table); | |
2684 | memset (varobj_table, 0, sizeof_table); | |
2685 | ||
85c07804 AC |
2686 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2687 | &varobjdebug, _("\ | |
2688 | Set varobj debugging."), _("\ | |
2689 | Show varobj debugging."), _("\ | |
2690 | When non-zero, varobj debugging is enabled."), | |
2691 | NULL, | |
920d2a44 | 2692 | show_varobjdebug, |
85c07804 | 2693 | &setlist, &showlist); |
8b93c638 | 2694 | } |
8756216b DP |
2695 | |
2696 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2697 | are defined on globals. | |
2698 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2699 | void | |
2700 | varobj_invalidate (void) | |
2701 | { | |
2702 | struct varobj **all_rootvarobj; | |
2703 | struct varobj **varp; | |
2704 | ||
2705 | if (varobj_list (&all_rootvarobj) > 0) | |
2706 | { | |
2707 | varp = all_rootvarobj; | |
2708 | while (*varp != NULL) | |
2709 | { | |
2710 | /* global var must be re-evaluated. */ | |
2711 | if ((*varp)->root->valid_block == NULL) | |
2712 | { | |
2713 | struct varobj *tmp_var; | |
2714 | ||
2715 | /* Try to create a varobj with same expression. If we succeed replace | |
2716 | the old varobj, otherwise invalidate it. */ | |
2717 | tmp_var = varobj_create (NULL, (*varp)->name, (CORE_ADDR) 0, USE_CURRENT_FRAME); | |
2718 | if (tmp_var != NULL) | |
2719 | { | |
2720 | tmp_var->obj_name = xstrdup ((*varp)->obj_name); | |
2721 | varobj_delete (*varp, NULL, 0); | |
2722 | install_variable (tmp_var); | |
2723 | } | |
2724 | else | |
2725 | (*varp)->root->is_valid = 0; | |
2726 | } | |
2727 | else /* locals must be invalidated. */ | |
2728 | (*varp)->root->is_valid = 0; | |
2729 | ||
2730 | varp++; | |
2731 | } | |
2732 | xfree (all_rootvarobj); | |
2733 | } | |
2734 | return; | |
2735 | } |