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 int variable_editable (struct varobj *var); |
8b93c638 | 225 | |
a14ed312 | 226 | static char *my_value_of_variable (struct varobj *var); |
8b93c638 | 227 | |
85265413 NR |
228 | static char *value_get_print_value (struct value *value, |
229 | enum varobj_display_formats format); | |
230 | ||
b2c2bd75 VP |
231 | static int varobj_value_is_changeable_p (struct varobj *var); |
232 | ||
233 | static int is_root_p (struct varobj *var); | |
8b93c638 JM |
234 | |
235 | /* C implementation */ | |
236 | ||
a14ed312 | 237 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 238 | |
a14ed312 | 239 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 240 | |
a14ed312 | 241 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 242 | |
02142340 VP |
243 | static char *c_path_expr_of_child (struct varobj *child); |
244 | ||
30b28db1 | 245 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 246 | |
30b28db1 | 247 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 248 | |
a14ed312 | 249 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 250 | |
a14ed312 | 251 | static int c_variable_editable (struct varobj *var); |
8b93c638 | 252 | |
a14ed312 | 253 | static char *c_value_of_variable (struct varobj *var); |
8b93c638 JM |
254 | |
255 | /* C++ implementation */ | |
256 | ||
a14ed312 | 257 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 258 | |
a14ed312 | 259 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 260 | |
a14ed312 | 261 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 262 | |
a14ed312 | 263 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 264 | |
02142340 VP |
265 | static char *cplus_path_expr_of_child (struct varobj *child); |
266 | ||
30b28db1 | 267 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 268 | |
30b28db1 | 269 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 270 | |
a14ed312 | 271 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 272 | |
a14ed312 | 273 | static int cplus_variable_editable (struct varobj *var); |
8b93c638 | 274 | |
a14ed312 | 275 | static char *cplus_value_of_variable (struct varobj *var); |
8b93c638 JM |
276 | |
277 | /* Java implementation */ | |
278 | ||
a14ed312 | 279 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 280 | |
a14ed312 | 281 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 282 | |
a14ed312 | 283 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 284 | |
02142340 VP |
285 | static char *java_path_expr_of_child (struct varobj *child); |
286 | ||
30b28db1 | 287 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 288 | |
30b28db1 | 289 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 290 | |
a14ed312 | 291 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 292 | |
a14ed312 | 293 | static int java_variable_editable (struct varobj *var); |
8b93c638 | 294 | |
a14ed312 | 295 | static char *java_value_of_variable (struct varobj *var); |
8b93c638 JM |
296 | |
297 | /* The language specific vector */ | |
298 | ||
299 | struct language_specific | |
72330bd6 | 300 | { |
8b93c638 | 301 | |
72330bd6 AC |
302 | /* The language of this variable */ |
303 | enum varobj_languages language; | |
8b93c638 | 304 | |
72330bd6 AC |
305 | /* The number of children of PARENT. */ |
306 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 307 | |
72330bd6 AC |
308 | /* The name (expression) of a root varobj. */ |
309 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 310 | |
72330bd6 AC |
311 | /* The name of the INDEX'th child of PARENT. */ |
312 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 313 | |
02142340 VP |
314 | /* Returns the rooted expression of CHILD, which is a variable |
315 | obtain that has some parent. */ | |
316 | char *(*path_expr_of_child) (struct varobj * child); | |
317 | ||
30b28db1 AC |
318 | /* The ``struct value *'' of the root variable ROOT. */ |
319 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 320 | |
30b28db1 AC |
321 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
322 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 323 | |
72330bd6 AC |
324 | /* The type of the INDEX'th child of PARENT. */ |
325 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 326 | |
72330bd6 AC |
327 | /* Is VAR editable? */ |
328 | int (*variable_editable) (struct varobj * var); | |
8b93c638 | 329 | |
72330bd6 AC |
330 | /* The current value of VAR. */ |
331 | char *(*value_of_variable) (struct varobj * var); | |
332 | }; | |
8b93c638 JM |
333 | |
334 | /* Array of known source language routines. */ | |
d5d6fca5 | 335 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
336 | /* Unknown (try treating as C */ |
337 | { | |
72330bd6 AC |
338 | vlang_unknown, |
339 | c_number_of_children, | |
340 | c_name_of_variable, | |
341 | c_name_of_child, | |
02142340 | 342 | c_path_expr_of_child, |
72330bd6 AC |
343 | c_value_of_root, |
344 | c_value_of_child, | |
345 | c_type_of_child, | |
346 | c_variable_editable, | |
347 | c_value_of_variable} | |
8b93c638 JM |
348 | , |
349 | /* C */ | |
350 | { | |
72330bd6 AC |
351 | vlang_c, |
352 | c_number_of_children, | |
353 | c_name_of_variable, | |
354 | c_name_of_child, | |
02142340 | 355 | c_path_expr_of_child, |
72330bd6 AC |
356 | c_value_of_root, |
357 | c_value_of_child, | |
358 | c_type_of_child, | |
359 | c_variable_editable, | |
360 | c_value_of_variable} | |
8b93c638 JM |
361 | , |
362 | /* C++ */ | |
363 | { | |
72330bd6 AC |
364 | vlang_cplus, |
365 | cplus_number_of_children, | |
366 | cplus_name_of_variable, | |
367 | cplus_name_of_child, | |
02142340 | 368 | cplus_path_expr_of_child, |
72330bd6 AC |
369 | cplus_value_of_root, |
370 | cplus_value_of_child, | |
371 | cplus_type_of_child, | |
372 | cplus_variable_editable, | |
373 | cplus_value_of_variable} | |
8b93c638 JM |
374 | , |
375 | /* Java */ | |
376 | { | |
72330bd6 AC |
377 | vlang_java, |
378 | java_number_of_children, | |
379 | java_name_of_variable, | |
380 | java_name_of_child, | |
02142340 | 381 | java_path_expr_of_child, |
72330bd6 AC |
382 | java_value_of_root, |
383 | java_value_of_child, | |
384 | java_type_of_child, | |
385 | java_variable_editable, | |
386 | java_value_of_variable} | |
8b93c638 JM |
387 | }; |
388 | ||
389 | /* A little convenience enum for dealing with C++/Java */ | |
390 | enum vsections | |
72330bd6 AC |
391 | { |
392 | v_public = 0, v_private, v_protected | |
393 | }; | |
8b93c638 JM |
394 | |
395 | /* Private data */ | |
396 | ||
397 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 398 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
399 | |
400 | /* Header of the list of root variable objects */ | |
401 | static struct varobj_root *rootlist; | |
402 | static int rootcount = 0; /* number of root varobjs in the list */ | |
403 | ||
404 | /* Prime number indicating the number of buckets in the hash table */ | |
405 | /* A prime large enough to avoid too many colisions */ | |
406 | #define VAROBJ_TABLE_SIZE 227 | |
407 | ||
408 | /* Pointer to the varobj hash table (built at run time) */ | |
409 | static struct vlist **varobj_table; | |
410 | ||
8b93c638 JM |
411 | /* Is the variable X one of our "fake" children? */ |
412 | #define CPLUS_FAKE_CHILD(x) \ | |
413 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
414 | \f | |
415 | ||
416 | /* API Implementation */ | |
b2c2bd75 VP |
417 | static int |
418 | is_root_p (struct varobj *var) | |
419 | { | |
420 | return (var->root->rootvar == var); | |
421 | } | |
8b93c638 JM |
422 | |
423 | /* Creates a varobj (not its children) */ | |
424 | ||
7d8547c9 AC |
425 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
426 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
427 | ||
428 | static struct frame_info * | |
429 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
430 | { | |
431 | struct frame_info *frame = NULL; | |
432 | ||
433 | if (frame_addr == (CORE_ADDR) 0) | |
434 | return NULL; | |
435 | ||
436 | while (1) | |
437 | { | |
438 | frame = get_prev_frame (frame); | |
439 | if (frame == NULL) | |
440 | return NULL; | |
eb5492fa | 441 | if (get_frame_base_address (frame) == frame_addr) |
7d8547c9 AC |
442 | return frame; |
443 | } | |
444 | } | |
445 | ||
8b93c638 JM |
446 | struct varobj * |
447 | varobj_create (char *objname, | |
72330bd6 | 448 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
449 | { |
450 | struct varobj *var; | |
2c67cb8b AC |
451 | struct frame_info *fi; |
452 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
453 | struct block *block; |
454 | struct cleanup *old_chain; | |
455 | ||
456 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
457 | var = new_root_variable (); | |
74b7792f | 458 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
459 | |
460 | if (expression != NULL) | |
461 | { | |
462 | char *p; | |
463 | enum varobj_languages lang; | |
e55dccf0 | 464 | struct value *value = NULL; |
02142340 | 465 | int expr_len; |
8b93c638 JM |
466 | |
467 | /* Parse and evaluate the expression, filling in as much | |
468 | of the variable's data as possible */ | |
469 | ||
470 | /* Allow creator to specify context of variable */ | |
72330bd6 | 471 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
206415a3 | 472 | fi = deprecated_safe_get_selected_frame (); |
8b93c638 | 473 | else |
7d8547c9 AC |
474 | /* FIXME: cagney/2002-11-23: This code should be doing a |
475 | lookup using the frame ID and not just the frame's | |
476 | ``address''. This, of course, means an interface change. | |
477 | However, with out that interface change ISAs, such as the | |
478 | ia64 with its two stacks, won't work. Similar goes for the | |
479 | case where there is a frameless function. */ | |
8b93c638 JM |
480 | fi = find_frame_addr_in_frame_chain (frame); |
481 | ||
73a93a32 JI |
482 | /* frame = -2 means always use selected frame */ |
483 | if (type == USE_SELECTED_FRAME) | |
484 | var->root->use_selected_frame = 1; | |
485 | ||
8b93c638 JM |
486 | block = NULL; |
487 | if (fi != NULL) | |
ae767bfb | 488 | block = get_frame_block (fi, 0); |
8b93c638 JM |
489 | |
490 | p = expression; | |
491 | innermost_block = NULL; | |
73a93a32 JI |
492 | /* Wrap the call to parse expression, so we can |
493 | return a sensible error. */ | |
494 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
495 | { | |
496 | return NULL; | |
497 | } | |
8b93c638 JM |
498 | |
499 | /* Don't allow variables to be created for types. */ | |
500 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
501 | { | |
502 | do_cleanups (old_chain); | |
bc8332bb AC |
503 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
504 | " as an expression.\n"); | |
8b93c638 JM |
505 | return NULL; |
506 | } | |
507 | ||
508 | var->format = variable_default_display (var); | |
509 | var->root->valid_block = innermost_block; | |
02142340 VP |
510 | expr_len = strlen (expression); |
511 | var->name = savestring (expression, expr_len); | |
512 | /* For a root var, the name and the expr are the same. */ | |
513 | var->path_expr = savestring (expression, expr_len); | |
8b93c638 JM |
514 | |
515 | /* When the frame is different from the current frame, | |
516 | we must select the appropriate frame before parsing | |
517 | the expression, otherwise the value will not be current. | |
518 | Since select_frame is so benign, just call it for all cases. */ | |
519 | if (fi != NULL) | |
520 | { | |
7a424e99 | 521 | var->root->frame = get_frame_id (fi); |
206415a3 | 522 | old_fi = get_selected_frame (NULL); |
0f7d239c | 523 | select_frame (fi); |
8b93c638 JM |
524 | } |
525 | ||
526 | /* We definitively need to catch errors here. | |
527 | If evaluate_expression succeeds we got the value we wanted. | |
528 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb | 529 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
e55dccf0 VP |
530 | { |
531 | /* Error getting the value. Try to at least get the | |
532 | right type. */ | |
533 | struct value *type_only_value = evaluate_type (var->root->exp); | |
534 | var->type = value_type (type_only_value); | |
535 | } | |
536 | else | |
537 | var->type = value_type (value); | |
acd65feb | 538 | |
acd65feb | 539 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
540 | |
541 | /* Set language info */ | |
542 | lang = variable_language (var); | |
d5d6fca5 | 543 | var->root->lang = &languages[lang]; |
8b93c638 JM |
544 | |
545 | /* Set ourselves as our root */ | |
546 | var->root->rootvar = var; | |
547 | ||
548 | /* Reset the selected frame */ | |
549 | if (fi != NULL) | |
0f7d239c | 550 | select_frame (old_fi); |
8b93c638 JM |
551 | } |
552 | ||
73a93a32 JI |
553 | /* If the variable object name is null, that means this |
554 | is a temporary variable, so don't install it. */ | |
555 | ||
556 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 JM |
557 | { |
558 | var->obj_name = savestring (objname, strlen (objname)); | |
559 | ||
560 | /* If a varobj name is duplicated, the install will fail so | |
561 | we must clenup */ | |
562 | if (!install_variable (var)) | |
563 | { | |
564 | do_cleanups (old_chain); | |
565 | return NULL; | |
566 | } | |
567 | } | |
568 | ||
569 | discard_cleanups (old_chain); | |
570 | return var; | |
571 | } | |
572 | ||
573 | /* Generates an unique name that can be used for a varobj */ | |
574 | ||
575 | char * | |
576 | varobj_gen_name (void) | |
577 | { | |
578 | static int id = 0; | |
e64d9b3d | 579 | char *obj_name; |
8b93c638 JM |
580 | |
581 | /* generate a name for this object */ | |
582 | id++; | |
b435e160 | 583 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 584 | |
e64d9b3d | 585 | return obj_name; |
8b93c638 JM |
586 | } |
587 | ||
588 | /* Given an "objname", returns the pointer to the corresponding varobj | |
589 | or NULL if not found */ | |
590 | ||
591 | struct varobj * | |
592 | varobj_get_handle (char *objname) | |
593 | { | |
594 | struct vlist *cv; | |
595 | const char *chp; | |
596 | unsigned int index = 0; | |
597 | unsigned int i = 1; | |
598 | ||
599 | for (chp = objname; *chp; chp++) | |
600 | { | |
601 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
602 | } | |
603 | ||
604 | cv = *(varobj_table + index); | |
605 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
606 | cv = cv->next; | |
607 | ||
608 | if (cv == NULL) | |
8a3fe4f8 | 609 | error (_("Variable object not found")); |
8b93c638 JM |
610 | |
611 | return cv->var; | |
612 | } | |
613 | ||
614 | /* Given the handle, return the name of the object */ | |
615 | ||
616 | char * | |
617 | varobj_get_objname (struct varobj *var) | |
618 | { | |
619 | return var->obj_name; | |
620 | } | |
621 | ||
622 | /* Given the handle, return the expression represented by the object */ | |
623 | ||
624 | char * | |
625 | varobj_get_expression (struct varobj *var) | |
626 | { | |
627 | return name_of_variable (var); | |
628 | } | |
629 | ||
630 | /* Deletes a varobj and all its children if only_children == 0, | |
631 | otherwise deletes only the children; returns a malloc'ed list of all the | |
632 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
633 | ||
634 | int | |
635 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
636 | { | |
637 | int delcount; | |
638 | int mycount; | |
639 | struct cpstack *result = NULL; | |
640 | char **cp; | |
641 | ||
642 | /* Initialize a stack for temporary results */ | |
643 | cppush (&result, NULL); | |
644 | ||
645 | if (only_children) | |
646 | /* Delete only the variable children */ | |
647 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
648 | else | |
649 | /* Delete the variable and all its children */ | |
650 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
651 | ||
652 | /* We may have been asked to return a list of what has been deleted */ | |
653 | if (dellist != NULL) | |
654 | { | |
655 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
656 | ||
657 | cp = *dellist; | |
658 | mycount = delcount; | |
659 | *cp = cppop (&result); | |
660 | while ((*cp != NULL) && (mycount > 0)) | |
661 | { | |
662 | mycount--; | |
663 | cp++; | |
664 | *cp = cppop (&result); | |
665 | } | |
666 | ||
667 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 668 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 669 | mycount); |
8b93c638 JM |
670 | } |
671 | ||
672 | return delcount; | |
673 | } | |
674 | ||
675 | /* Set/Get variable object display format */ | |
676 | ||
677 | enum varobj_display_formats | |
678 | varobj_set_display_format (struct varobj *var, | |
679 | enum varobj_display_formats format) | |
680 | { | |
681 | switch (format) | |
682 | { | |
683 | case FORMAT_NATURAL: | |
684 | case FORMAT_BINARY: | |
685 | case FORMAT_DECIMAL: | |
686 | case FORMAT_HEXADECIMAL: | |
687 | case FORMAT_OCTAL: | |
688 | var->format = format; | |
689 | break; | |
690 | ||
691 | default: | |
692 | var->format = variable_default_display (var); | |
693 | } | |
694 | ||
695 | return var->format; | |
696 | } | |
697 | ||
698 | enum varobj_display_formats | |
699 | varobj_get_display_format (struct varobj *var) | |
700 | { | |
701 | return var->format; | |
702 | } | |
703 | ||
25d5ea92 VP |
704 | void |
705 | varobj_set_frozen (struct varobj *var, int frozen) | |
706 | { | |
707 | /* When a variable is unfrozen, we don't fetch its value. | |
708 | The 'not_fetched' flag remains set, so next -var-update | |
709 | won't complain. | |
710 | ||
711 | We don't fetch the value, because for structures the client | |
712 | should do -var-update anyway. It would be bad to have different | |
713 | client-size logic for structure and other types. */ | |
714 | var->frozen = frozen; | |
715 | } | |
716 | ||
717 | int | |
718 | varobj_get_frozen (struct varobj *var) | |
719 | { | |
720 | return var->frozen; | |
721 | } | |
722 | ||
723 | ||
8b93c638 JM |
724 | int |
725 | varobj_get_num_children (struct varobj *var) | |
726 | { | |
727 | if (var->num_children == -1) | |
728 | var->num_children = number_of_children (var); | |
729 | ||
730 | return var->num_children; | |
731 | } | |
732 | ||
733 | /* Creates a list of the immediate children of a variable object; | |
734 | the return code is the number of such children or -1 on error */ | |
735 | ||
736 | int | |
737 | varobj_list_children (struct varobj *var, struct varobj ***childlist) | |
738 | { | |
739 | struct varobj *child; | |
740 | char *name; | |
741 | int i; | |
742 | ||
743 | /* sanity check: have we been passed a pointer? */ | |
744 | if (childlist == NULL) | |
745 | return -1; | |
746 | ||
747 | *childlist = NULL; | |
748 | ||
749 | if (var->num_children == -1) | |
750 | var->num_children = number_of_children (var); | |
751 | ||
74a44383 DJ |
752 | /* If that failed, give up. */ |
753 | if (var->num_children == -1) | |
754 | return -1; | |
755 | ||
28335dcc VP |
756 | /* If we're called when the list of children is not yet initialized, |
757 | allocate enough elements in it. */ | |
758 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
759 | VEC_safe_push (varobj_p, var->children, NULL); | |
760 | ||
8b93c638 JM |
761 | /* List of children */ |
762 | *childlist = xmalloc ((var->num_children + 1) * sizeof (struct varobj *)); | |
763 | ||
764 | for (i = 0; i < var->num_children; i++) | |
765 | { | |
28335dcc VP |
766 | varobj_p existing; |
767 | ||
8b93c638 JM |
768 | /* Mark as the end in case we bail out */ |
769 | *((*childlist) + i) = NULL; | |
770 | ||
28335dcc VP |
771 | existing = VEC_index (varobj_p, var->children, i); |
772 | ||
773 | if (existing == NULL) | |
774 | { | |
775 | /* Either it's the first call to varobj_list_children for | |
776 | this variable object, and the child was never created, | |
777 | or it was explicitly deleted by the client. */ | |
778 | name = name_of_child (var, i); | |
779 | existing = create_child (var, i, name); | |
780 | VEC_replace (varobj_p, var->children, i, existing); | |
781 | } | |
8b93c638 | 782 | |
28335dcc | 783 | *((*childlist) + i) = existing; |
8b93c638 JM |
784 | } |
785 | ||
786 | /* End of list is marked by a NULL pointer */ | |
787 | *((*childlist) + i) = NULL; | |
788 | ||
789 | return var->num_children; | |
790 | } | |
791 | ||
792 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
793 | prints on the console */ | |
794 | ||
795 | char * | |
796 | varobj_get_type (struct varobj *var) | |
797 | { | |
30b28db1 | 798 | struct value *val; |
8b93c638 JM |
799 | struct cleanup *old_chain; |
800 | struct ui_file *stb; | |
801 | char *thetype; | |
802 | long length; | |
803 | ||
804 | /* For the "fake" variables, do not return a type. (It's type is | |
8756216b DP |
805 | NULL, too.) |
806 | Do not return a type for invalid variables as well. */ | |
807 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
808 | return NULL; |
809 | ||
810 | stb = mem_fileopen (); | |
811 | old_chain = make_cleanup_ui_file_delete (stb); | |
812 | ||
30b28db1 | 813 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
814 | cast it to our type. We then typeprint this variable. */ |
815 | val = value_zero (var->type, not_lval); | |
df407dfe | 816 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
817 | |
818 | thetype = ui_file_xstrdup (stb, &length); | |
819 | do_cleanups (old_chain); | |
820 | return thetype; | |
821 | } | |
822 | ||
1ecb4ee0 DJ |
823 | /* Obtain the type of an object variable. */ |
824 | ||
825 | struct type * | |
826 | varobj_get_gdb_type (struct varobj *var) | |
827 | { | |
828 | return var->type; | |
829 | } | |
830 | ||
02142340 VP |
831 | /* Return a pointer to the full rooted expression of varobj VAR. |
832 | If it has not been computed yet, compute it. */ | |
833 | char * | |
834 | varobj_get_path_expr (struct varobj *var) | |
835 | { | |
836 | if (var->path_expr != NULL) | |
837 | return var->path_expr; | |
838 | else | |
839 | { | |
840 | /* For root varobjs, we initialize path_expr | |
841 | when creating varobj, so here it should be | |
842 | child varobj. */ | |
843 | gdb_assert (!is_root_p (var)); | |
844 | return (*var->root->lang->path_expr_of_child) (var); | |
845 | } | |
846 | } | |
847 | ||
8b93c638 JM |
848 | enum varobj_languages |
849 | varobj_get_language (struct varobj *var) | |
850 | { | |
851 | return variable_language (var); | |
852 | } | |
853 | ||
854 | int | |
855 | varobj_get_attributes (struct varobj *var) | |
856 | { | |
857 | int attributes = 0; | |
858 | ||
8756216b | 859 | if (var->root->is_valid && variable_editable (var)) |
8b93c638 JM |
860 | /* FIXME: define masks for attributes */ |
861 | attributes |= 0x00000001; /* Editable */ | |
862 | ||
863 | return attributes; | |
864 | } | |
865 | ||
866 | char * | |
867 | varobj_get_value (struct varobj *var) | |
868 | { | |
869 | return my_value_of_variable (var); | |
870 | } | |
871 | ||
872 | /* Set the value of an object variable (if it is editable) to the | |
873 | value of the given expression */ | |
874 | /* Note: Invokes functions that can call error() */ | |
875 | ||
876 | int | |
877 | varobj_set_value (struct varobj *var, char *expression) | |
878 | { | |
30b28db1 | 879 | struct value *val; |
8b93c638 | 880 | int offset = 0; |
a6c442d8 | 881 | int error = 0; |
8b93c638 JM |
882 | |
883 | /* The argument "expression" contains the variable's new value. | |
884 | We need to first construct a legal expression for this -- ugh! */ | |
885 | /* Does this cover all the bases? */ | |
886 | struct expression *exp; | |
30b28db1 | 887 | struct value *value; |
8b93c638 JM |
888 | int saved_input_radix = input_radix; |
889 | ||
b20d8971 | 890 | if (var->value != NULL && variable_editable (var)) |
8b93c638 JM |
891 | { |
892 | char *s = expression; | |
893 | int i; | |
8b93c638 JM |
894 | |
895 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ | |
7a24eb7c | 896 | exp = parse_exp_1 (&s, 0, 0); |
8b93c638 JM |
897 | if (!gdb_evaluate_expression (exp, &value)) |
898 | { | |
899 | /* We cannot proceed without a valid expression. */ | |
8038e1e2 | 900 | xfree (exp); |
8b93c638 JM |
901 | return 0; |
902 | } | |
903 | ||
acd65feb | 904 | /* All types that are editable must also be changeable. */ |
b2c2bd75 | 905 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb VP |
906 | |
907 | /* The value of a changeable variable object must not be lazy. */ | |
908 | gdb_assert (!value_lazy (var->value)); | |
909 | ||
910 | /* Need to coerce the input. We want to check if the | |
911 | value of the variable object will be different | |
912 | after assignment, and the first thing value_assign | |
913 | does is coerce the input. | |
914 | For example, if we are assigning an array to a pointer variable we | |
915 | should compare the pointer with the the array's address, not with the | |
916 | array's content. */ | |
917 | value = coerce_array (value); | |
918 | ||
acd65feb VP |
919 | /* The new value may be lazy. gdb_value_assign, or |
920 | rather value_contents, will take care of this. | |
921 | If fetching of the new value will fail, gdb_value_assign | |
922 | with catch the exception. */ | |
575bbeb6 | 923 | if (!gdb_value_assign (var->value, value, &val)) |
8a1a0112 | 924 | return 0; |
b26ed50d | 925 | |
ae097835 VP |
926 | /* If the value has changed, record it, so that next -var-update can |
927 | report this change. If a variable had a value of '1', we've set it | |
928 | to '333' and then set again to '1', when -var-update will report this | |
929 | variable as changed -- because the first assignment has set the | |
930 | 'updated' flag. There's no need to optimize that, because return value | |
931 | of -var-update should be considered an approximation. */ | |
932 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
8b93c638 JM |
933 | input_radix = saved_input_radix; |
934 | return 1; | |
935 | } | |
936 | ||
937 | return 0; | |
938 | } | |
939 | ||
940 | /* Returns a malloc'ed list with all root variable objects */ | |
941 | int | |
942 | varobj_list (struct varobj ***varlist) | |
943 | { | |
944 | struct varobj **cv; | |
945 | struct varobj_root *croot; | |
946 | int mycount = rootcount; | |
947 | ||
948 | /* Alloc (rootcount + 1) entries for the result */ | |
949 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
950 | ||
951 | cv = *varlist; | |
952 | croot = rootlist; | |
953 | while ((croot != NULL) && (mycount > 0)) | |
954 | { | |
955 | *cv = croot->rootvar; | |
956 | mycount--; | |
957 | cv++; | |
958 | croot = croot->next; | |
959 | } | |
960 | /* Mark the end of the list */ | |
961 | *cv = NULL; | |
962 | ||
963 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
964 | warning |
965 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
966 | rootcount, mycount); | |
8b93c638 JM |
967 | |
968 | return rootcount; | |
969 | } | |
970 | ||
acd65feb VP |
971 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
972 | this is the first assignement after the variable object was just | |
973 | created, or changed type. In that case, just assign the value | |
974 | and return 0. | |
975 | Otherwise, assign the value and if type_changeable returns non-zero, | |
976 | find if the new value is different from the current value. | |
b26ed50d VP |
977 | Return 1 if so, and 0 if the values are equal. |
978 | ||
979 | The VALUE parameter should not be released -- the function will | |
980 | take care of releasing it when needed. */ | |
acd65feb VP |
981 | static int |
982 | install_new_value (struct varobj *var, struct value *value, int initial) | |
983 | { | |
984 | int changeable; | |
985 | int need_to_fetch; | |
986 | int changed = 0; | |
25d5ea92 | 987 | int intentionally_not_fetched = 0; |
acd65feb | 988 | |
acd65feb VP |
989 | /* We need to know the varobj's type to decide if the value should |
990 | be fetched or not. C++ fake children (public/protected/private) don't have | |
991 | a type. */ | |
992 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 993 | changeable = varobj_value_is_changeable_p (var); |
acd65feb VP |
994 | need_to_fetch = changeable; |
995 | ||
b26ed50d VP |
996 | /* We are not interested in the address of references, and given |
997 | that in C++ a reference is not rebindable, it cannot | |
998 | meaningfully change. So, get hold of the real value. */ | |
999 | if (value) | |
1000 | { | |
1001 | value = coerce_ref (value); | |
1002 | release_value (value); | |
1003 | } | |
1004 | ||
acd65feb VP |
1005 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
1006 | /* For unions, we need to fetch the value implicitly because | |
1007 | of implementation of union member fetch. When gdb | |
1008 | creates a value for a field and the value of the enclosing | |
1009 | structure is not lazy, it immediately copies the necessary | |
1010 | bytes from the enclosing values. If the enclosing value is | |
1011 | lazy, the call to value_fetch_lazy on the field will read | |
1012 | the data from memory. For unions, that means we'll read the | |
1013 | same memory more than once, which is not desirable. So | |
1014 | fetch now. */ | |
1015 | need_to_fetch = 1; | |
1016 | ||
1017 | /* The new value might be lazy. If the type is changeable, | |
1018 | that is we'll be comparing values of this type, fetch the | |
1019 | value now. Otherwise, on the next update the old value | |
1020 | will be lazy, which means we've lost that old value. */ | |
1021 | if (need_to_fetch && value && value_lazy (value)) | |
1022 | { | |
25d5ea92 VP |
1023 | struct varobj *parent = var->parent; |
1024 | int frozen = var->frozen; | |
1025 | for (; !frozen && parent; parent = parent->parent) | |
1026 | frozen |= parent->frozen; | |
1027 | ||
1028 | if (frozen && initial) | |
1029 | { | |
1030 | /* For variables that are frozen, or are children of frozen | |
1031 | variables, we don't do fetch on initial assignment. | |
1032 | For non-initial assignemnt we do the fetch, since it means we're | |
1033 | explicitly asked to compare the new value with the old one. */ | |
1034 | intentionally_not_fetched = 1; | |
1035 | } | |
1036 | else if (!gdb_value_fetch_lazy (value)) | |
acd65feb | 1037 | { |
acd65feb VP |
1038 | /* Set the value to NULL, so that for the next -var-update, |
1039 | we don't try to compare the new value with this value, | |
1040 | that we couldn't even read. */ | |
1041 | value = NULL; | |
1042 | } | |
acd65feb VP |
1043 | } |
1044 | ||
1045 | /* If the type is changeable, compare the old and the new values. | |
1046 | If this is the initial assignment, we don't have any old value | |
1047 | to compare with. */ | |
7af9851d | 1048 | if (initial && changeable) |
85265413 NR |
1049 | var->print_value = value_get_print_value (value, var->format); |
1050 | else if (changeable) | |
acd65feb VP |
1051 | { |
1052 | /* If the value of the varobj was changed by -var-set-value, then the | |
1053 | value in the varobj and in the target is the same. However, that value | |
1054 | is different from the value that the varobj had after the previous | |
57e66780 | 1055 | -var-update. So need to the varobj as changed. */ |
acd65feb | 1056 | if (var->updated) |
57e66780 DJ |
1057 | { |
1058 | xfree (var->print_value); | |
1059 | var->print_value = value_get_print_value (value, var->format); | |
1060 | changed = 1; | |
1061 | } | |
acd65feb VP |
1062 | else |
1063 | { | |
1064 | /* Try to compare the values. That requires that both | |
1065 | values are non-lazy. */ | |
25d5ea92 VP |
1066 | if (var->not_fetched && value_lazy (var->value)) |
1067 | { | |
1068 | /* This is a frozen varobj and the value was never read. | |
1069 | Presumably, UI shows some "never read" indicator. | |
1070 | Now that we've fetched the real value, we need to report | |
1071 | this varobj as changed so that UI can show the real | |
1072 | value. */ | |
1073 | changed = 1; | |
1074 | } | |
1075 | else if (var->value == NULL && value == NULL) | |
acd65feb VP |
1076 | /* Equal. */ |
1077 | ; | |
1078 | else if (var->value == NULL || value == NULL) | |
57e66780 DJ |
1079 | { |
1080 | xfree (var->print_value); | |
1081 | var->print_value = value_get_print_value (value, var->format); | |
1082 | changed = 1; | |
1083 | } | |
acd65feb VP |
1084 | else |
1085 | { | |
85265413 | 1086 | char *print_value; |
acd65feb VP |
1087 | gdb_assert (!value_lazy (var->value)); |
1088 | gdb_assert (!value_lazy (value)); | |
85265413 NR |
1089 | print_value = value_get_print_value (value, var->format); |
1090 | ||
57e66780 | 1091 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 NR |
1092 | if (strcmp (var->print_value, print_value) != 0) |
1093 | { | |
1094 | xfree (var->print_value); | |
1095 | var->print_value = print_value; | |
1096 | changed = 1; | |
1097 | } | |
1098 | else | |
1099 | xfree (print_value); | |
acd65feb VP |
1100 | } |
1101 | } | |
1102 | } | |
85265413 | 1103 | |
acd65feb | 1104 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1105 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1106 | value_free (var->value); |
1107 | var->value = value; | |
25d5ea92 VP |
1108 | if (value && value_lazy (value) && intentionally_not_fetched) |
1109 | var->not_fetched = 1; | |
1110 | else | |
1111 | var->not_fetched = 0; | |
acd65feb | 1112 | var->updated = 0; |
85265413 | 1113 | |
b26ed50d | 1114 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1115 | |
1116 | return changed; | |
1117 | } | |
acd65feb | 1118 | |
8b93c638 JM |
1119 | /* Update the values for a variable and its children. This is a |
1120 | two-pronged attack. First, re-parse the value for the root's | |
1121 | expression to see if it's changed. Then go all the way | |
1122 | through its children, reconstructing them and noting if they've | |
1123 | changed. | |
8756216b DP |
1124 | Return value: |
1125 | < 0 for error values, see varobj.h. | |
1126 | Otherwise it is the number of children + parent changed. | |
8b93c638 | 1127 | |
25d5ea92 VP |
1128 | The EXPLICIT parameter specifies if this call is result |
1129 | of MI request to update this specific variable, or | |
1130 | result of implicit -var-update *. For implicit request, we don't | |
1131 | update frozen variables. | |
705da579 KS |
1132 | |
1133 | NOTE: This function may delete the caller's varobj. If it | |
8756216b DP |
1134 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1135 | to point to the new varobj. */ | |
8b93c638 JM |
1136 | |
1137 | int | |
25d5ea92 VP |
1138 | varobj_update (struct varobj **varp, struct varobj ***changelist, |
1139 | int explicit) | |
8b93c638 JM |
1140 | { |
1141 | int changed = 0; | |
25d5ea92 | 1142 | int type_changed = 0; |
8b93c638 JM |
1143 | int i; |
1144 | int vleft; | |
8b93c638 JM |
1145 | struct varobj *v; |
1146 | struct varobj **cv; | |
2c67cb8b | 1147 | struct varobj **templist = NULL; |
30b28db1 | 1148 | struct value *new; |
28335dcc VP |
1149 | VEC (varobj_p) *stack = NULL; |
1150 | VEC (varobj_p) *result = NULL; | |
e64d9b3d MH |
1151 | struct frame_id old_fid; |
1152 | struct frame_info *fi; | |
8b93c638 | 1153 | |
8756216b | 1154 | /* sanity check: have we been passed a pointer? */ |
a1f42e84 | 1155 | gdb_assert (changelist); |
8b93c638 | 1156 | |
25d5ea92 VP |
1157 | /* Frozen means frozen -- we don't check for any change in |
1158 | this varobj, including its going out of scope, or | |
1159 | changing type. One use case for frozen varobjs is | |
1160 | retaining previously evaluated expressions, and we don't | |
1161 | want them to be reevaluated at all. */ | |
1162 | if (!explicit && (*varp)->frozen) | |
1163 | return 0; | |
8756216b DP |
1164 | |
1165 | if (!(*varp)->root->is_valid) | |
1166 | return INVALID; | |
8b93c638 | 1167 | |
25d5ea92 | 1168 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1169 | { |
25d5ea92 VP |
1170 | /* Save the selected stack frame, since we will need to change it |
1171 | in order to evaluate expressions. */ | |
1172 | old_fid = get_frame_id (deprecated_safe_get_selected_frame ()); | |
1173 | ||
1174 | /* Update the root variable. value_of_root can return NULL | |
1175 | if the variable is no longer around, i.e. we stepped out of | |
1176 | the frame in which a local existed. We are letting the | |
1177 | value_of_root variable dispose of the varobj if the type | |
1178 | has changed. */ | |
1179 | type_changed = 1; | |
1180 | new = value_of_root (varp, &type_changed); | |
1181 | ||
1182 | /* Restore selected frame. */ | |
1183 | fi = frame_find_by_id (old_fid); | |
1184 | if (fi) | |
1185 | select_frame (fi); | |
1186 | ||
1187 | /* If this is a "use_selected_frame" varobj, and its type has changed, | |
1188 | them note that it's changed. */ | |
1189 | if (type_changed) | |
1190 | VEC_safe_push (varobj_p, result, *varp); | |
1191 | ||
1192 | if (install_new_value ((*varp), new, type_changed)) | |
1193 | { | |
1194 | /* If type_changed is 1, install_new_value will never return | |
1195 | non-zero, so we'll never report the same variable twice. */ | |
1196 | gdb_assert (!type_changed); | |
1197 | VEC_safe_push (varobj_p, result, *varp); | |
1198 | } | |
8b93c638 | 1199 | |
25d5ea92 VP |
1200 | if (new == NULL) |
1201 | { | |
1202 | /* This means the varobj itself is out of scope. | |
1203 | Report it. */ | |
1204 | VEC_free (varobj_p, result); | |
1205 | return NOT_IN_SCOPE; | |
1206 | } | |
b20d8971 VP |
1207 | } |
1208 | ||
28335dcc | 1209 | VEC_safe_push (varobj_p, stack, *varp); |
8b93c638 | 1210 | |
8756216b | 1211 | /* Walk through the children, reconstructing them all. */ |
28335dcc | 1212 | while (!VEC_empty (varobj_p, stack)) |
8b93c638 | 1213 | { |
28335dcc VP |
1214 | v = VEC_pop (varobj_p, stack); |
1215 | ||
1216 | /* Push any children. Use reverse order so that the first | |
1217 | child is popped from the work stack first, and so | |
1218 | will be added to result first. This does not | |
1219 | affect correctness, just "nicer". */ | |
1220 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1221 | { |
28335dcc VP |
1222 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1223 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
25d5ea92 | 1224 | if (c != NULL && !c->frozen) |
28335dcc | 1225 | VEC_safe_push (varobj_p, stack, c); |
8b93c638 JM |
1226 | } |
1227 | ||
28335dcc VP |
1228 | /* Update this variable, unless it's a root, which is already |
1229 | updated. */ | |
25d5ea92 | 1230 | if (v->root->rootvar != v) |
28335dcc VP |
1231 | { |
1232 | new = value_of_child (v->parent, v->index); | |
1233 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1234 | { | |
1235 | /* Note that it's changed */ | |
1236 | VEC_safe_push (varobj_p, result, v); | |
1237 | v->updated = 0; | |
1238 | } | |
8b93c638 | 1239 | } |
8b93c638 JM |
1240 | } |
1241 | ||
8756216b | 1242 | /* Alloc (changed + 1) list entries. */ |
28335dcc | 1243 | changed = VEC_length (varobj_p, result); |
8b93c638 | 1244 | *changelist = xmalloc ((changed + 1) * sizeof (struct varobj *)); |
28335dcc | 1245 | cv = *changelist; |
8b93c638 | 1246 | |
28335dcc | 1247 | for (i = 0; i < changed; ++i) |
8b93c638 | 1248 | { |
28335dcc VP |
1249 | *cv = VEC_index (varobj_p, result, i); |
1250 | gdb_assert (*cv != NULL); | |
1251 | ++cv; | |
8b93c638 | 1252 | } |
28335dcc | 1253 | *cv = 0; |
8b93c638 | 1254 | |
93b979d6 NR |
1255 | VEC_free (varobj_p, stack); |
1256 | VEC_free (varobj_p, result); | |
1257 | ||
73a93a32 | 1258 | if (type_changed) |
8756216b | 1259 | return TYPE_CHANGED; |
73a93a32 JI |
1260 | else |
1261 | return changed; | |
8b93c638 JM |
1262 | } |
1263 | \f | |
1264 | ||
1265 | /* Helper functions */ | |
1266 | ||
1267 | /* | |
1268 | * Variable object construction/destruction | |
1269 | */ | |
1270 | ||
1271 | static int | |
fba45db2 KB |
1272 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1273 | int only_children_p) | |
8b93c638 JM |
1274 | { |
1275 | int delcount = 0; | |
1276 | ||
1277 | delete_variable_1 (resultp, &delcount, var, | |
1278 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1279 | ||
1280 | return delcount; | |
1281 | } | |
1282 | ||
1283 | /* Delete the variable object VAR and its children */ | |
1284 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1285 | and the parent is not removed we dump core. It must be always | |
1286 | initially called with remove_from_parent_p set */ | |
1287 | static void | |
72330bd6 AC |
1288 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1289 | struct varobj *var, int only_children_p, | |
1290 | int remove_from_parent_p) | |
8b93c638 | 1291 | { |
28335dcc | 1292 | int i; |
8b93c638 JM |
1293 | |
1294 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1295 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1296 | { | |
1297 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
8b93c638 | 1298 | if (!remove_from_parent_p) |
28335dcc VP |
1299 | child->parent = NULL; |
1300 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1301 | } |
28335dcc | 1302 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1303 | |
1304 | /* if we were called to delete only the children we are done here */ | |
1305 | if (only_children_p) | |
1306 | return; | |
1307 | ||
1308 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1309 | /* If the name is null, this is a temporary variable, that has not |
1310 | yet been installed, don't report it, it belongs to the caller... */ | |
1311 | if (var->obj_name != NULL) | |
8b93c638 | 1312 | { |
5b616ba1 | 1313 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1314 | *delcountp = *delcountp + 1; |
1315 | } | |
1316 | ||
1317 | /* If this variable has a parent, remove it from its parent's list */ | |
1318 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1319 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1320 | expensive list search to find the element to remove when we are | |
1321 | discarding the list afterwards */ | |
72330bd6 | 1322 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1323 | { |
28335dcc | 1324 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1325 | } |
72330bd6 | 1326 | |
73a93a32 JI |
1327 | if (var->obj_name != NULL) |
1328 | uninstall_variable (var); | |
8b93c638 JM |
1329 | |
1330 | /* Free memory associated with this variable */ | |
1331 | free_variable (var); | |
1332 | } | |
1333 | ||
1334 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1335 | static int | |
fba45db2 | 1336 | install_variable (struct varobj *var) |
8b93c638 JM |
1337 | { |
1338 | struct vlist *cv; | |
1339 | struct vlist *newvl; | |
1340 | const char *chp; | |
1341 | unsigned int index = 0; | |
1342 | unsigned int i = 1; | |
1343 | ||
1344 | for (chp = var->obj_name; *chp; chp++) | |
1345 | { | |
1346 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1347 | } | |
1348 | ||
1349 | cv = *(varobj_table + index); | |
1350 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1351 | cv = cv->next; | |
1352 | ||
1353 | if (cv != NULL) | |
8a3fe4f8 | 1354 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1355 | |
1356 | /* Add varobj to hash table */ | |
1357 | newvl = xmalloc (sizeof (struct vlist)); | |
1358 | newvl->next = *(varobj_table + index); | |
1359 | newvl->var = var; | |
1360 | *(varobj_table + index) = newvl; | |
1361 | ||
1362 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1363 | if (is_root_p (var)) |
8b93c638 JM |
1364 | { |
1365 | /* Add to list of root variables */ | |
1366 | if (rootlist == NULL) | |
1367 | var->root->next = NULL; | |
1368 | else | |
1369 | var->root->next = rootlist; | |
1370 | rootlist = var->root; | |
1371 | rootcount++; | |
1372 | } | |
1373 | ||
1374 | return 1; /* OK */ | |
1375 | } | |
1376 | ||
1377 | /* Unistall the object VAR. */ | |
1378 | static void | |
fba45db2 | 1379 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1380 | { |
1381 | struct vlist *cv; | |
1382 | struct vlist *prev; | |
1383 | struct varobj_root *cr; | |
1384 | struct varobj_root *prer; | |
1385 | const char *chp; | |
1386 | unsigned int index = 0; | |
1387 | unsigned int i = 1; | |
1388 | ||
1389 | /* Remove varobj from hash table */ | |
1390 | for (chp = var->obj_name; *chp; chp++) | |
1391 | { | |
1392 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1393 | } | |
1394 | ||
1395 | cv = *(varobj_table + index); | |
1396 | prev = NULL; | |
1397 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1398 | { | |
1399 | prev = cv; | |
1400 | cv = cv->next; | |
1401 | } | |
1402 | ||
1403 | if (varobjdebug) | |
1404 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1405 | ||
1406 | if (cv == NULL) | |
1407 | { | |
72330bd6 AC |
1408 | warning |
1409 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1410 | var->obj_name); | |
8b93c638 JM |
1411 | return; |
1412 | } | |
1413 | ||
1414 | if (prev == NULL) | |
1415 | *(varobj_table + index) = cv->next; | |
1416 | else | |
1417 | prev->next = cv->next; | |
1418 | ||
b8c9b27d | 1419 | xfree (cv); |
8b93c638 JM |
1420 | |
1421 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1422 | if (is_root_p (var)) |
8b93c638 JM |
1423 | { |
1424 | /* Remove from list of root variables */ | |
1425 | if (rootlist == var->root) | |
1426 | rootlist = var->root->next; | |
1427 | else | |
1428 | { | |
1429 | prer = NULL; | |
1430 | cr = rootlist; | |
1431 | while ((cr != NULL) && (cr->rootvar != var)) | |
1432 | { | |
1433 | prer = cr; | |
1434 | cr = cr->next; | |
1435 | } | |
1436 | if (cr == NULL) | |
1437 | { | |
72330bd6 AC |
1438 | warning |
1439 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1440 | var->obj_name); | |
8b93c638 JM |
1441 | return; |
1442 | } | |
1443 | if (prer == NULL) | |
1444 | rootlist = NULL; | |
1445 | else | |
1446 | prer->next = cr->next; | |
1447 | } | |
1448 | rootcount--; | |
1449 | } | |
1450 | ||
1451 | } | |
1452 | ||
8b93c638 JM |
1453 | /* Create and install a child of the parent of the given name */ |
1454 | static struct varobj * | |
fba45db2 | 1455 | create_child (struct varobj *parent, int index, char *name) |
8b93c638 JM |
1456 | { |
1457 | struct varobj *child; | |
1458 | char *childs_name; | |
acd65feb | 1459 | struct value *value; |
8b93c638 JM |
1460 | |
1461 | child = new_variable (); | |
1462 | ||
1463 | /* name is allocated by name_of_child */ | |
1464 | child->name = name; | |
1465 | child->index = index; | |
acd65feb | 1466 | value = value_of_child (parent, index); |
8b93c638 JM |
1467 | child->parent = parent; |
1468 | child->root = parent->root; | |
b435e160 | 1469 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1470 | child->obj_name = childs_name; |
1471 | install_variable (child); | |
1472 | ||
acd65feb VP |
1473 | /* Compute the type of the child. Must do this before |
1474 | calling install_new_value. */ | |
1475 | if (value != NULL) | |
1476 | /* If the child had no evaluation errors, var->value | |
1477 | will be non-NULL and contain a valid type. */ | |
1478 | child->type = value_type (value); | |
1479 | else | |
1480 | /* Otherwise, we must compute the type. */ | |
1481 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1482 | child->index); | |
1483 | install_new_value (child, value, 1); | |
1484 | ||
8b93c638 JM |
1485 | return child; |
1486 | } | |
8b93c638 JM |
1487 | \f |
1488 | ||
1489 | /* | |
1490 | * Miscellaneous utility functions. | |
1491 | */ | |
1492 | ||
1493 | /* Allocate memory and initialize a new variable */ | |
1494 | static struct varobj * | |
1495 | new_variable (void) | |
1496 | { | |
1497 | struct varobj *var; | |
1498 | ||
1499 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1500 | var->name = NULL; | |
02142340 | 1501 | var->path_expr = NULL; |
8b93c638 JM |
1502 | var->obj_name = NULL; |
1503 | var->index = -1; | |
1504 | var->type = NULL; | |
1505 | var->value = NULL; | |
8b93c638 JM |
1506 | var->num_children = -1; |
1507 | var->parent = NULL; | |
1508 | var->children = NULL; | |
1509 | var->format = 0; | |
1510 | var->root = NULL; | |
fb9b6b35 | 1511 | var->updated = 0; |
85265413 | 1512 | var->print_value = NULL; |
25d5ea92 VP |
1513 | var->frozen = 0; |
1514 | var->not_fetched = 0; | |
8b93c638 JM |
1515 | |
1516 | return var; | |
1517 | } | |
1518 | ||
1519 | /* Allocate memory and initialize a new root variable */ | |
1520 | static struct varobj * | |
1521 | new_root_variable (void) | |
1522 | { | |
1523 | struct varobj *var = new_variable (); | |
1524 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1525 | var->root->lang = NULL; | |
1526 | var->root->exp = NULL; | |
1527 | var->root->valid_block = NULL; | |
7a424e99 | 1528 | var->root->frame = null_frame_id; |
73a93a32 | 1529 | var->root->use_selected_frame = 0; |
8b93c638 | 1530 | var->root->rootvar = NULL; |
8756216b | 1531 | var->root->is_valid = 1; |
8b93c638 JM |
1532 | |
1533 | return var; | |
1534 | } | |
1535 | ||
1536 | /* Free any allocated memory associated with VAR. */ | |
1537 | static void | |
fba45db2 | 1538 | free_variable (struct varobj *var) |
8b93c638 JM |
1539 | { |
1540 | /* Free the expression if this is a root variable. */ | |
b2c2bd75 | 1541 | if (is_root_p (var)) |
8b93c638 | 1542 | { |
96c1eda2 | 1543 | free_current_contents (&var->root->exp); |
8038e1e2 | 1544 | xfree (var->root); |
8b93c638 JM |
1545 | } |
1546 | ||
8038e1e2 AC |
1547 | xfree (var->name); |
1548 | xfree (var->obj_name); | |
85265413 | 1549 | xfree (var->print_value); |
02142340 | 1550 | xfree (var->path_expr); |
8038e1e2 | 1551 | xfree (var); |
8b93c638 JM |
1552 | } |
1553 | ||
74b7792f AC |
1554 | static void |
1555 | do_free_variable_cleanup (void *var) | |
1556 | { | |
1557 | free_variable (var); | |
1558 | } | |
1559 | ||
1560 | static struct cleanup * | |
1561 | make_cleanup_free_variable (struct varobj *var) | |
1562 | { | |
1563 | return make_cleanup (do_free_variable_cleanup, var); | |
1564 | } | |
1565 | ||
6766a268 DJ |
1566 | /* This returns the type of the variable. It also skips past typedefs |
1567 | to return the real type of the variable. | |
94b66fa7 KS |
1568 | |
1569 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1570 | except within get_target_type and get_type. */ | |
8b93c638 | 1571 | static struct type * |
fba45db2 | 1572 | get_type (struct varobj *var) |
8b93c638 JM |
1573 | { |
1574 | struct type *type; | |
1575 | type = var->type; | |
1576 | ||
6766a268 DJ |
1577 | if (type != NULL) |
1578 | type = check_typedef (type); | |
8b93c638 JM |
1579 | |
1580 | return type; | |
1581 | } | |
1582 | ||
6e2a9270 VP |
1583 | /* Return the type of the value that's stored in VAR, |
1584 | or that would have being stored there if the | |
1585 | value were accessible. | |
1586 | ||
1587 | This differs from VAR->type in that VAR->type is always | |
1588 | the true type of the expession in the source language. | |
1589 | The return value of this function is the type we're | |
1590 | actually storing in varobj, and using for displaying | |
1591 | the values and for comparing previous and new values. | |
1592 | ||
1593 | For example, top-level references are always stripped. */ | |
1594 | static struct type * | |
1595 | get_value_type (struct varobj *var) | |
1596 | { | |
1597 | struct type *type; | |
1598 | ||
1599 | if (var->value) | |
1600 | type = value_type (var->value); | |
1601 | else | |
1602 | type = var->type; | |
1603 | ||
1604 | type = check_typedef (type); | |
1605 | ||
1606 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1607 | type = get_target_type (type); | |
1608 | ||
1609 | type = check_typedef (type); | |
1610 | ||
1611 | return type; | |
1612 | } | |
1613 | ||
8b93c638 | 1614 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
1615 | past typedefs, just like get_type (). |
1616 | ||
1617 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1618 | except within get_target_type and get_type. */ | |
8b93c638 | 1619 | static struct type * |
fba45db2 | 1620 | get_target_type (struct type *type) |
8b93c638 JM |
1621 | { |
1622 | if (type != NULL) | |
1623 | { | |
1624 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1625 | if (type != NULL) |
1626 | type = check_typedef (type); | |
8b93c638 JM |
1627 | } |
1628 | ||
1629 | return type; | |
1630 | } | |
1631 | ||
1632 | /* What is the default display for this variable? We assume that | |
1633 | everything is "natural". Any exceptions? */ | |
1634 | static enum varobj_display_formats | |
fba45db2 | 1635 | variable_default_display (struct varobj *var) |
8b93c638 JM |
1636 | { |
1637 | return FORMAT_NATURAL; | |
1638 | } | |
1639 | ||
8b93c638 JM |
1640 | /* FIXME: The following should be generic for any pointer */ |
1641 | static void | |
fba45db2 | 1642 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
1643 | { |
1644 | struct cpstack *s; | |
1645 | ||
1646 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1647 | s->name = name; | |
1648 | s->next = *pstack; | |
1649 | *pstack = s; | |
1650 | } | |
1651 | ||
1652 | /* FIXME: The following should be generic for any pointer */ | |
1653 | static char * | |
fba45db2 | 1654 | cppop (struct cpstack **pstack) |
8b93c638 JM |
1655 | { |
1656 | struct cpstack *s; | |
1657 | char *v; | |
1658 | ||
1659 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1660 | return NULL; | |
1661 | ||
1662 | s = *pstack; | |
1663 | v = s->name; | |
1664 | *pstack = (*pstack)->next; | |
b8c9b27d | 1665 | xfree (s); |
8b93c638 JM |
1666 | |
1667 | return v; | |
1668 | } | |
1669 | \f | |
1670 | /* | |
1671 | * Language-dependencies | |
1672 | */ | |
1673 | ||
1674 | /* Common entry points */ | |
1675 | ||
1676 | /* Get the language of variable VAR. */ | |
1677 | static enum varobj_languages | |
fba45db2 | 1678 | variable_language (struct varobj *var) |
8b93c638 JM |
1679 | { |
1680 | enum varobj_languages lang; | |
1681 | ||
1682 | switch (var->root->exp->language_defn->la_language) | |
1683 | { | |
1684 | default: | |
1685 | case language_c: | |
1686 | lang = vlang_c; | |
1687 | break; | |
1688 | case language_cplus: | |
1689 | lang = vlang_cplus; | |
1690 | break; | |
1691 | case language_java: | |
1692 | lang = vlang_java; | |
1693 | break; | |
1694 | } | |
1695 | ||
1696 | return lang; | |
1697 | } | |
1698 | ||
1699 | /* Return the number of children for a given variable. | |
1700 | The result of this function is defined by the language | |
1701 | implementation. The number of children returned by this function | |
1702 | is the number of children that the user will see in the variable | |
1703 | display. */ | |
1704 | static int | |
fba45db2 | 1705 | number_of_children (struct varobj *var) |
8b93c638 JM |
1706 | { |
1707 | return (*var->root->lang->number_of_children) (var);; | |
1708 | } | |
1709 | ||
1710 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1711 | static char * | |
fba45db2 | 1712 | name_of_variable (struct varobj *var) |
8b93c638 JM |
1713 | { |
1714 | return (*var->root->lang->name_of_variable) (var); | |
1715 | } | |
1716 | ||
1717 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1718 | static char * | |
fba45db2 | 1719 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
1720 | { |
1721 | return (*var->root->lang->name_of_child) (var, index); | |
1722 | } | |
1723 | ||
30b28db1 | 1724 | /* What is the ``struct value *'' of the root variable VAR? |
73a93a32 JI |
1725 | TYPE_CHANGED controls what to do if the type of a |
1726 | use_selected_frame = 1 variable changes. On input, | |
1727 | TYPE_CHANGED = 1 means discard the old varobj, and replace | |
1728 | it with this one. TYPE_CHANGED = 0 means leave it around. | |
1729 | NB: In both cases, var_handle will point to the new varobj, | |
1730 | so if you use TYPE_CHANGED = 0, you will have to stash the | |
1731 | old varobj pointer away somewhere before calling this. | |
1732 | On return, TYPE_CHANGED will be 1 if the type has changed, and | |
1733 | 0 otherwise. */ | |
30b28db1 | 1734 | static struct value * |
fba45db2 | 1735 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 1736 | { |
73a93a32 JI |
1737 | struct varobj *var; |
1738 | ||
1739 | if (var_handle == NULL) | |
1740 | return NULL; | |
1741 | ||
1742 | var = *var_handle; | |
1743 | ||
1744 | /* This should really be an exception, since this should | |
1745 | only get called with a root variable. */ | |
1746 | ||
b2c2bd75 | 1747 | if (!is_root_p (var)) |
73a93a32 JI |
1748 | return NULL; |
1749 | ||
1750 | if (var->root->use_selected_frame) | |
1751 | { | |
1752 | struct varobj *tmp_var; | |
1753 | char *old_type, *new_type; | |
6225abfa | 1754 | |
73a93a32 JI |
1755 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
1756 | USE_SELECTED_FRAME); | |
1757 | if (tmp_var == NULL) | |
1758 | { | |
1759 | return NULL; | |
1760 | } | |
6225abfa | 1761 | old_type = varobj_get_type (var); |
73a93a32 | 1762 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 1763 | if (strcmp (old_type, new_type) == 0) |
73a93a32 JI |
1764 | { |
1765 | varobj_delete (tmp_var, NULL, 0); | |
1766 | *type_changed = 0; | |
1767 | } | |
1768 | else | |
1769 | { | |
1770 | if (*type_changed) | |
1771 | { | |
72330bd6 | 1772 | tmp_var->obj_name = |
73a93a32 | 1773 | savestring (var->obj_name, strlen (var->obj_name)); |
f7635dd9 | 1774 | varobj_delete (var, NULL, 0); |
73a93a32 JI |
1775 | } |
1776 | else | |
1777 | { | |
72330bd6 | 1778 | tmp_var->obj_name = varobj_gen_name (); |
73a93a32 JI |
1779 | } |
1780 | install_variable (tmp_var); | |
1781 | *var_handle = tmp_var; | |
705da579 | 1782 | var = *var_handle; |
73a93a32 JI |
1783 | *type_changed = 1; |
1784 | } | |
74dddad3 MS |
1785 | xfree (old_type); |
1786 | xfree (new_type); | |
73a93a32 JI |
1787 | } |
1788 | else | |
1789 | { | |
1790 | *type_changed = 0; | |
1791 | } | |
1792 | ||
1793 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1794 | } |
1795 | ||
30b28db1 AC |
1796 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
1797 | static struct value * | |
fba45db2 | 1798 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 1799 | { |
30b28db1 | 1800 | struct value *value; |
8b93c638 JM |
1801 | |
1802 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1803 | ||
8b93c638 JM |
1804 | return value; |
1805 | } | |
1806 | ||
8b93c638 JM |
1807 | /* Is this variable editable? Use the variable's type to make |
1808 | this determination. */ | |
1809 | static int | |
fba45db2 | 1810 | variable_editable (struct varobj *var) |
8b93c638 JM |
1811 | { |
1812 | return (*var->root->lang->variable_editable) (var); | |
1813 | } | |
1814 | ||
1815 | /* GDB already has a command called "value_of_variable". Sigh. */ | |
1816 | static char * | |
fba45db2 | 1817 | my_value_of_variable (struct varobj *var) |
8b93c638 | 1818 | { |
8756216b DP |
1819 | if (var->root->is_valid) |
1820 | return (*var->root->lang->value_of_variable) (var); | |
1821 | else | |
1822 | return NULL; | |
8b93c638 JM |
1823 | } |
1824 | ||
85265413 NR |
1825 | static char * |
1826 | value_get_print_value (struct value *value, enum varobj_display_formats format) | |
1827 | { | |
1828 | long dummy; | |
57e66780 DJ |
1829 | struct ui_file *stb; |
1830 | struct cleanup *old_chain; | |
85265413 | 1831 | char *thevalue; |
57e66780 DJ |
1832 | |
1833 | if (value == NULL) | |
1834 | return NULL; | |
1835 | ||
1836 | stb = mem_fileopen (); | |
1837 | old_chain = make_cleanup_ui_file_delete (stb); | |
1838 | ||
85265413 NR |
1839 | common_val_print (value, stb, format_code[(int) format], 1, 0, 0); |
1840 | thevalue = ui_file_xstrdup (stb, &dummy); | |
57e66780 | 1841 | |
85265413 NR |
1842 | do_cleanups (old_chain); |
1843 | return thevalue; | |
1844 | } | |
1845 | ||
acd65feb VP |
1846 | /* Return non-zero if changes in value of VAR |
1847 | must be detected and reported by -var-update. | |
1848 | Return zero is -var-update should never report | |
1849 | changes of such values. This makes sense for structures | |
1850 | (since the changes in children values will be reported separately), | |
1851 | or for artifical objects (like 'public' pseudo-field in C++). | |
1852 | ||
1853 | Return value of 0 means that gdb need not call value_fetch_lazy | |
1854 | for the value of this variable object. */ | |
8b93c638 | 1855 | static int |
b2c2bd75 | 1856 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
1857 | { |
1858 | int r; | |
1859 | struct type *type; | |
1860 | ||
1861 | if (CPLUS_FAKE_CHILD (var)) | |
1862 | return 0; | |
1863 | ||
6e2a9270 | 1864 | type = get_value_type (var); |
8b93c638 JM |
1865 | |
1866 | switch (TYPE_CODE (type)) | |
1867 | { | |
72330bd6 AC |
1868 | case TYPE_CODE_STRUCT: |
1869 | case TYPE_CODE_UNION: | |
1870 | case TYPE_CODE_ARRAY: | |
1871 | r = 0; | |
1872 | break; | |
8b93c638 | 1873 | |
72330bd6 AC |
1874 | default: |
1875 | r = 1; | |
8b93c638 JM |
1876 | } |
1877 | ||
1878 | return r; | |
1879 | } | |
1880 | ||
2024f65a VP |
1881 | /* Given the value and the type of a variable object, |
1882 | adjust the value and type to those necessary | |
1883 | for getting children of the variable object. | |
1884 | This includes dereferencing top-level references | |
1885 | to all types and dereferencing pointers to | |
1886 | structures. | |
1887 | ||
1888 | Both TYPE and *TYPE should be non-null. VALUE | |
1889 | can be null if we want to only translate type. | |
1890 | *VALUE can be null as well -- if the parent | |
02142340 VP |
1891 | value is not known. |
1892 | ||
1893 | If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1 | |
1894 | depending on whether pointer was deferenced | |
1895 | in this function. */ | |
2024f65a VP |
1896 | static void |
1897 | adjust_value_for_child_access (struct value **value, | |
02142340 VP |
1898 | struct type **type, |
1899 | int *was_ptr) | |
2024f65a VP |
1900 | { |
1901 | gdb_assert (type && *type); | |
1902 | ||
02142340 VP |
1903 | if (was_ptr) |
1904 | *was_ptr = 0; | |
1905 | ||
2024f65a VP |
1906 | *type = check_typedef (*type); |
1907 | ||
1908 | /* The type of value stored in varobj, that is passed | |
1909 | to us, is already supposed to be | |
1910 | reference-stripped. */ | |
1911 | ||
1912 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
1913 | ||
1914 | /* Pointers to structures are treated just like | |
1915 | structures when accessing children. Don't | |
1916 | dererences pointers to other types. */ | |
1917 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
1918 | { | |
1919 | struct type *target_type = get_target_type (*type); | |
1920 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
1921 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
1922 | { | |
1923 | if (value && *value) | |
1924 | gdb_value_ind (*value, value); | |
1925 | *type = target_type; | |
02142340 VP |
1926 | if (was_ptr) |
1927 | *was_ptr = 1; | |
2024f65a VP |
1928 | } |
1929 | } | |
1930 | ||
1931 | /* The 'get_target_type' function calls check_typedef on | |
1932 | result, so we can immediately check type code. No | |
1933 | need to call check_typedef here. */ | |
1934 | } | |
1935 | ||
8b93c638 JM |
1936 | /* C */ |
1937 | static int | |
fba45db2 | 1938 | c_number_of_children (struct varobj *var) |
8b93c638 | 1939 | { |
2024f65a VP |
1940 | struct type *type = get_value_type (var); |
1941 | int children = 0; | |
8b93c638 | 1942 | struct type *target; |
8b93c638 | 1943 | |
02142340 | 1944 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 | 1945 | target = get_target_type (type); |
8b93c638 JM |
1946 | |
1947 | switch (TYPE_CODE (type)) | |
1948 | { | |
1949 | case TYPE_CODE_ARRAY: | |
1950 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
72330bd6 | 1951 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) |
8b93c638 JM |
1952 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
1953 | else | |
74a44383 DJ |
1954 | /* If we don't know how many elements there are, don't display |
1955 | any. */ | |
1956 | children = 0; | |
8b93c638 JM |
1957 | break; |
1958 | ||
1959 | case TYPE_CODE_STRUCT: | |
1960 | case TYPE_CODE_UNION: | |
1961 | children = TYPE_NFIELDS (type); | |
1962 | break; | |
1963 | ||
1964 | case TYPE_CODE_PTR: | |
2024f65a VP |
1965 | /* The type here is a pointer to non-struct. Typically, pointers |
1966 | have one child, except for function ptrs, which have no children, | |
1967 | and except for void*, as we don't know what to show. | |
1968 | ||
0755e6c1 FN |
1969 | We can show char* so we allow it to be dereferenced. If you decide |
1970 | to test for it, please mind that a little magic is necessary to | |
1971 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
1972 | TYPE_NAME == "char" */ | |
2024f65a VP |
1973 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
1974 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
1975 | children = 0; | |
1976 | else | |
1977 | children = 1; | |
8b93c638 JM |
1978 | break; |
1979 | ||
1980 | default: | |
1981 | /* Other types have no children */ | |
1982 | break; | |
1983 | } | |
1984 | ||
1985 | return children; | |
1986 | } | |
1987 | ||
1988 | static char * | |
fba45db2 | 1989 | c_name_of_variable (struct varobj *parent) |
8b93c638 JM |
1990 | { |
1991 | return savestring (parent->name, strlen (parent->name)); | |
1992 | } | |
1993 | ||
bbec2603 VP |
1994 | /* Return the value of element TYPE_INDEX of a structure |
1995 | value VALUE. VALUE's type should be a structure, | |
1996 | or union, or a typedef to struct/union. | |
1997 | ||
1998 | Returns NULL if getting the value fails. Never throws. */ | |
1999 | static struct value * | |
2000 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 2001 | { |
bbec2603 VP |
2002 | struct value *result = NULL; |
2003 | volatile struct gdb_exception e; | |
8b93c638 | 2004 | |
bbec2603 VP |
2005 | struct type *type = value_type (value); |
2006 | type = check_typedef (type); | |
2007 | ||
2008 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2009 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 2010 | |
bbec2603 VP |
2011 | TRY_CATCH (e, RETURN_MASK_ERROR) |
2012 | { | |
2013 | if (TYPE_FIELD_STATIC (type, type_index)) | |
2014 | result = value_static_field (type, type_index); | |
2015 | else | |
2016 | result = value_primitive_field (value, 0, type_index, type); | |
2017 | } | |
2018 | if (e.reason < 0) | |
2019 | { | |
2020 | return NULL; | |
2021 | } | |
2022 | else | |
2023 | { | |
2024 | return result; | |
2025 | } | |
2026 | } | |
2027 | ||
2028 | /* Obtain the information about child INDEX of the variable | |
2029 | object PARENT. | |
2030 | If CNAME is not null, sets *CNAME to the name of the child relative | |
2031 | to the parent. | |
2032 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
2033 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
2034 | ||
2035 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
2036 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
2037 | to NULL. */ | |
2038 | static void | |
2039 | c_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2040 | char **cname, struct value **cvalue, struct type **ctype, |
2041 | char **cfull_expression) | |
bbec2603 VP |
2042 | { |
2043 | struct value *value = parent->value; | |
2024f65a | 2044 | struct type *type = get_value_type (parent); |
02142340 VP |
2045 | char *parent_expression = NULL; |
2046 | int was_ptr; | |
bbec2603 VP |
2047 | |
2048 | if (cname) | |
2049 | *cname = NULL; | |
2050 | if (cvalue) | |
2051 | *cvalue = NULL; | |
2052 | if (ctype) | |
2053 | *ctype = NULL; | |
02142340 VP |
2054 | if (cfull_expression) |
2055 | { | |
2056 | *cfull_expression = NULL; | |
2057 | parent_expression = varobj_get_path_expr (parent); | |
2058 | } | |
2059 | adjust_value_for_child_access (&value, &type, &was_ptr); | |
bbec2603 | 2060 | |
8b93c638 JM |
2061 | switch (TYPE_CODE (type)) |
2062 | { | |
2063 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
2064 | if (cname) |
2065 | *cname = xstrprintf ("%d", index | |
2066 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2067 | ||
2068 | if (cvalue && value) | |
2069 | { | |
2070 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
2071 | struct value *indval = | |
2072 | value_from_longest (builtin_type_int, (LONGEST) real_index); | |
2073 | gdb_value_subscript (value, indval, cvalue); | |
2074 | } | |
2075 | ||
2076 | if (ctype) | |
2077 | *ctype = get_target_type (type); | |
2078 | ||
02142340 VP |
2079 | if (cfull_expression) |
2080 | *cfull_expression = xstrprintf ("(%s)[%d]", parent_expression, | |
2081 | index | |
2082 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2083 | ||
2084 | ||
8b93c638 JM |
2085 | break; |
2086 | ||
2087 | case TYPE_CODE_STRUCT: | |
2088 | case TYPE_CODE_UNION: | |
bbec2603 VP |
2089 | if (cname) |
2090 | { | |
2091 | char *string = TYPE_FIELD_NAME (type, index); | |
2092 | *cname = savestring (string, strlen (string)); | |
2093 | } | |
2094 | ||
2095 | if (cvalue && value) | |
2096 | { | |
2097 | /* For C, varobj index is the same as type index. */ | |
2098 | *cvalue = value_struct_element_index (value, index); | |
2099 | } | |
2100 | ||
2101 | if (ctype) | |
2102 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2103 | ||
02142340 VP |
2104 | if (cfull_expression) |
2105 | { | |
2106 | char *join = was_ptr ? "->" : "."; | |
2107 | *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, join, | |
2108 | TYPE_FIELD_NAME (type, index)); | |
2109 | } | |
2110 | ||
8b93c638 JM |
2111 | break; |
2112 | ||
2113 | case TYPE_CODE_PTR: | |
bbec2603 VP |
2114 | if (cname) |
2115 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 2116 | |
bbec2603 VP |
2117 | if (cvalue && value) |
2118 | gdb_value_ind (value, cvalue); | |
2119 | ||
2024f65a VP |
2120 | /* Don't use get_target_type because it calls |
2121 | check_typedef and here, we want to show the true | |
2122 | declared type of the variable. */ | |
bbec2603 | 2123 | if (ctype) |
2024f65a | 2124 | *ctype = TYPE_TARGET_TYPE (type); |
02142340 VP |
2125 | |
2126 | if (cfull_expression) | |
2127 | *cfull_expression = xstrprintf ("*(%s)", parent_expression); | |
bbec2603 | 2128 | |
8b93c638 JM |
2129 | break; |
2130 | ||
2131 | default: | |
2132 | /* This should not happen */ | |
bbec2603 VP |
2133 | if (cname) |
2134 | *cname = xstrdup ("???"); | |
02142340 VP |
2135 | if (cfull_expression) |
2136 | *cfull_expression = xstrdup ("???"); | |
bbec2603 | 2137 | /* Don't set value and type, we don't know then. */ |
8b93c638 | 2138 | } |
bbec2603 | 2139 | } |
8b93c638 | 2140 | |
bbec2603 VP |
2141 | static char * |
2142 | c_name_of_child (struct varobj *parent, int index) | |
2143 | { | |
2144 | char *name; | |
02142340 | 2145 | c_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2146 | return name; |
2147 | } | |
2148 | ||
02142340 VP |
2149 | static char * |
2150 | c_path_expr_of_child (struct varobj *child) | |
2151 | { | |
2152 | c_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2153 | &child->path_expr); | |
2154 | return child->path_expr; | |
2155 | } | |
2156 | ||
30b28db1 | 2157 | static struct value * |
fba45db2 | 2158 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 2159 | { |
5e572bb4 | 2160 | struct value *new_val = NULL; |
73a93a32 | 2161 | struct varobj *var = *var_handle; |
8b93c638 JM |
2162 | struct frame_info *fi; |
2163 | int within_scope; | |
2164 | ||
73a93a32 | 2165 | /* Only root variables can be updated... */ |
b2c2bd75 | 2166 | if (!is_root_p (var)) |
73a93a32 JI |
2167 | /* Not a root var */ |
2168 | return NULL; | |
2169 | ||
72330bd6 | 2170 | |
8b93c638 | 2171 | /* Determine whether the variable is still around. */ |
b20d8971 | 2172 | if (var->root->valid_block == NULL || var->root->use_selected_frame) |
8b93c638 JM |
2173 | within_scope = 1; |
2174 | else | |
2175 | { | |
e64d9b3d | 2176 | fi = frame_find_by_id (var->root->frame); |
8b93c638 JM |
2177 | within_scope = fi != NULL; |
2178 | /* FIXME: select_frame could fail */ | |
d2353924 NR |
2179 | if (fi) |
2180 | { | |
2181 | CORE_ADDR pc = get_frame_pc (fi); | |
2182 | if (pc < BLOCK_START (var->root->valid_block) || | |
2183 | pc >= BLOCK_END (var->root->valid_block)) | |
2184 | within_scope = 0; | |
2d43bda2 NR |
2185 | else |
2186 | select_frame (fi); | |
d2353924 | 2187 | } |
8b93c638 | 2188 | } |
72330bd6 | 2189 | |
8b93c638 JM |
2190 | if (within_scope) |
2191 | { | |
73a93a32 | 2192 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
2193 | expression fails we want to just return NULL. */ |
2194 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
2195 | return new_val; |
2196 | } | |
2197 | ||
2198 | return NULL; | |
2199 | } | |
2200 | ||
30b28db1 | 2201 | static struct value * |
fba45db2 | 2202 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2203 | { |
bbec2603 | 2204 | struct value *value = NULL; |
02142340 | 2205 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2206 | |
2207 | return value; | |
2208 | } | |
2209 | ||
2210 | static struct type * | |
fba45db2 | 2211 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2212 | { |
bbec2603 | 2213 | struct type *type = NULL; |
02142340 | 2214 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2215 | return type; |
2216 | } | |
2217 | ||
2218 | static int | |
fba45db2 | 2219 | c_variable_editable (struct varobj *var) |
8b93c638 | 2220 | { |
6e2a9270 | 2221 | switch (TYPE_CODE (get_value_type (var))) |
8b93c638 JM |
2222 | { |
2223 | case TYPE_CODE_STRUCT: | |
2224 | case TYPE_CODE_UNION: | |
2225 | case TYPE_CODE_ARRAY: | |
2226 | case TYPE_CODE_FUNC: | |
8b93c638 JM |
2227 | case TYPE_CODE_METHOD: |
2228 | return 0; | |
2229 | break; | |
2230 | ||
2231 | default: | |
2232 | return 1; | |
2233 | break; | |
2234 | } | |
2235 | } | |
2236 | ||
2237 | static char * | |
fba45db2 | 2238 | c_value_of_variable (struct varobj *var) |
8b93c638 | 2239 | { |
14b3d9c9 JB |
2240 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2241 | it will print out its children instead of "{...}". So we need to | |
2242 | catch that case explicitly. */ | |
2243 | struct type *type = get_type (var); | |
e64d9b3d | 2244 | |
14b3d9c9 JB |
2245 | /* Strip top-level references. */ |
2246 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2247 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2248 | ||
2249 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2250 | { |
2251 | case TYPE_CODE_STRUCT: | |
2252 | case TYPE_CODE_UNION: | |
2253 | return xstrdup ("{...}"); | |
2254 | /* break; */ | |
2255 | ||
2256 | case TYPE_CODE_ARRAY: | |
2257 | { | |
e64d9b3d | 2258 | char *number; |
b435e160 | 2259 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2260 | return (number); |
8b93c638 JM |
2261 | } |
2262 | /* break; */ | |
2263 | ||
2264 | default: | |
2265 | { | |
575bbeb6 KS |
2266 | if (var->value == NULL) |
2267 | { | |
2268 | /* This can happen if we attempt to get the value of a struct | |
2269 | member when the parent is an invalid pointer. This is an | |
2270 | error condition, so we should tell the caller. */ | |
2271 | return NULL; | |
2272 | } | |
2273 | else | |
2274 | { | |
25d5ea92 VP |
2275 | if (var->not_fetched && value_lazy (var->value)) |
2276 | /* Frozen variable and no value yet. We don't | |
2277 | implicitly fetch the value. MI response will | |
2278 | use empty string for the value, which is OK. */ | |
2279 | return NULL; | |
2280 | ||
b2c2bd75 | 2281 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2282 | gdb_assert (!value_lazy (var->value)); |
85265413 NR |
2283 | return value_get_print_value (var->value, var->format); |
2284 | } | |
e64d9b3d | 2285 | } |
8b93c638 JM |
2286 | } |
2287 | } | |
2288 | \f | |
2289 | ||
2290 | /* C++ */ | |
2291 | ||
2292 | static int | |
fba45db2 | 2293 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2294 | { |
2295 | struct type *type; | |
2296 | int children, dont_know; | |
2297 | ||
2298 | dont_know = 1; | |
2299 | children = 0; | |
2300 | ||
2301 | if (!CPLUS_FAKE_CHILD (var)) | |
2302 | { | |
2024f65a | 2303 | type = get_value_type (var); |
02142340 | 2304 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2305 | |
2306 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2307 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2308 | { |
2309 | int kids[3]; | |
2310 | ||
2311 | cplus_class_num_children (type, kids); | |
2312 | if (kids[v_public] != 0) | |
2313 | children++; | |
2314 | if (kids[v_private] != 0) | |
2315 | children++; | |
2316 | if (kids[v_protected] != 0) | |
2317 | children++; | |
2318 | ||
2319 | /* Add any baseclasses */ | |
2320 | children += TYPE_N_BASECLASSES (type); | |
2321 | dont_know = 0; | |
2322 | ||
2323 | /* FIXME: save children in var */ | |
2324 | } | |
2325 | } | |
2326 | else | |
2327 | { | |
2328 | int kids[3]; | |
2329 | ||
2024f65a | 2330 | type = get_value_type (var->parent); |
02142340 | 2331 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2332 | |
2333 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2334 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2335 | children = kids[v_public]; |
6e382aa3 | 2336 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2337 | children = kids[v_private]; |
2338 | else | |
2339 | children = kids[v_protected]; | |
2340 | dont_know = 0; | |
2341 | } | |
2342 | ||
2343 | if (dont_know) | |
2344 | children = c_number_of_children (var); | |
2345 | ||
2346 | return children; | |
2347 | } | |
2348 | ||
2349 | /* Compute # of public, private, and protected variables in this class. | |
2350 | That means we need to descend into all baseclasses and find out | |
2351 | how many are there, too. */ | |
2352 | static void | |
1669605f | 2353 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2354 | { |
2355 | int i; | |
2356 | ||
2357 | children[v_public] = 0; | |
2358 | children[v_private] = 0; | |
2359 | children[v_protected] = 0; | |
2360 | ||
2361 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2362 | { | |
2363 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2364 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2365 | continue; |
2366 | ||
2367 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2368 | children[v_protected]++; | |
2369 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2370 | children[v_private]++; | |
2371 | else | |
2372 | children[v_public]++; | |
2373 | } | |
2374 | } | |
2375 | ||
2376 | static char * | |
fba45db2 | 2377 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2378 | { |
2379 | return c_name_of_variable (parent); | |
2380 | } | |
2381 | ||
2024f65a VP |
2382 | enum accessibility { private_field, protected_field, public_field }; |
2383 | ||
2384 | /* Check if field INDEX of TYPE has the specified accessibility. | |
2385 | Return 0 if so and 1 otherwise. */ | |
2386 | static int | |
2387 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 2388 | { |
2024f65a VP |
2389 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
2390 | return 1; | |
2391 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
2392 | return 1; | |
2393 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
2394 | && !TYPE_FIELD_PROTECTED (type, index)) | |
2395 | return 1; | |
2396 | else | |
2397 | return 0; | |
2398 | } | |
2399 | ||
2400 | static void | |
2401 | cplus_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2402 | char **cname, struct value **cvalue, struct type **ctype, |
2403 | char **cfull_expression) | |
2024f65a | 2404 | { |
348144ba | 2405 | char *name = NULL; |
2024f65a | 2406 | struct value *value; |
8b93c638 | 2407 | struct type *type; |
02142340 VP |
2408 | int was_ptr; |
2409 | char *parent_expression = NULL; | |
8b93c638 | 2410 | |
2024f65a VP |
2411 | if (cname) |
2412 | *cname = NULL; | |
2413 | if (cvalue) | |
2414 | *cvalue = NULL; | |
2415 | if (ctype) | |
2416 | *ctype = NULL; | |
02142340 VP |
2417 | if (cfull_expression) |
2418 | *cfull_expression = NULL; | |
2024f65a | 2419 | |
8b93c638 JM |
2420 | if (CPLUS_FAKE_CHILD (parent)) |
2421 | { | |
2024f65a VP |
2422 | value = parent->parent->value; |
2423 | type = get_value_type (parent->parent); | |
02142340 VP |
2424 | if (cfull_expression) |
2425 | parent_expression = varobj_get_path_expr (parent->parent); | |
8b93c638 JM |
2426 | } |
2427 | else | |
2024f65a VP |
2428 | { |
2429 | value = parent->value; | |
2430 | type = get_value_type (parent); | |
02142340 VP |
2431 | if (cfull_expression) |
2432 | parent_expression = varobj_get_path_expr (parent); | |
2024f65a | 2433 | } |
8b93c638 | 2434 | |
02142340 | 2435 | adjust_value_for_child_access (&value, &type, &was_ptr); |
2024f65a VP |
2436 | |
2437 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2438 | || TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
8b93c638 | 2439 | { |
02142340 | 2440 | char *join = was_ptr ? "->" : "."; |
8b93c638 JM |
2441 | if (CPLUS_FAKE_CHILD (parent)) |
2442 | { | |
6e382aa3 JJ |
2443 | /* The fields of the class type are ordered as they |
2444 | appear in the class. We are given an index for a | |
2445 | particular access control type ("public","protected", | |
2446 | or "private"). We must skip over fields that don't | |
2447 | have the access control we are looking for to properly | |
2448 | find the indexed field. */ | |
2449 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 2450 | enum accessibility acc = public_field; |
6e382aa3 | 2451 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 2452 | acc = private_field; |
6e382aa3 | 2453 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
2454 | acc = protected_field; |
2455 | ||
2456 | while (index >= 0) | |
6e382aa3 | 2457 | { |
2024f65a VP |
2458 | if (TYPE_VPTR_BASETYPE (type) == type |
2459 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2460 | ; /* ignore vptr */ | |
2461 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
2462 | --index; |
2463 | ++type_index; | |
6e382aa3 | 2464 | } |
2024f65a VP |
2465 | --type_index; |
2466 | ||
2467 | if (cname) | |
2468 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
2469 | ||
2470 | if (cvalue && value) | |
2471 | *cvalue = value_struct_element_index (value, type_index); | |
2472 | ||
2473 | if (ctype) | |
2474 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
02142340 VP |
2475 | |
2476 | if (cfull_expression) | |
2477 | *cfull_expression = xstrprintf ("((%s)%s%s)", parent_expression, | |
2478 | join, | |
2479 | TYPE_FIELD_NAME (type, type_index)); | |
2024f65a VP |
2480 | } |
2481 | else if (index < TYPE_N_BASECLASSES (type)) | |
2482 | { | |
2483 | /* This is a baseclass. */ | |
2484 | if (cname) | |
2485 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
2486 | ||
2487 | if (cvalue && value) | |
6e382aa3 | 2488 | { |
2024f65a | 2489 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
02142340 | 2490 | release_value (*cvalue); |
6e382aa3 JJ |
2491 | } |
2492 | ||
2024f65a VP |
2493 | if (ctype) |
2494 | { | |
2495 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2496 | } | |
02142340 VP |
2497 | |
2498 | if (cfull_expression) | |
2499 | { | |
2500 | char *ptr = was_ptr ? "*" : ""; | |
2501 | /* Cast the parent to the base' type. Note that in gdb, | |
2502 | expression like | |
2503 | (Base1)d | |
2504 | will create an lvalue, for all appearences, so we don't | |
2505 | need to use more fancy: | |
2506 | *(Base1*)(&d) | |
2507 | construct. */ | |
2508 | *cfull_expression = xstrprintf ("(%s(%s%s) %s)", | |
2509 | ptr, | |
2510 | TYPE_FIELD_NAME (type, index), | |
2511 | ptr, | |
2512 | parent_expression); | |
2513 | } | |
8b93c638 | 2514 | } |
8b93c638 JM |
2515 | else |
2516 | { | |
348144ba | 2517 | char *access = NULL; |
6e382aa3 | 2518 | int children[3]; |
2024f65a | 2519 | cplus_class_num_children (type, children); |
6e382aa3 | 2520 | |
8b93c638 | 2521 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2522 | only be "public", "private", or "protected" |
2523 | ||
2524 | The special "fake" children are always output by varobj in | |
2525 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2526 | index -= TYPE_N_BASECLASSES (type); |
2527 | switch (index) | |
2528 | { | |
2529 | case 0: | |
6e382aa3 | 2530 | if (children[v_public] > 0) |
2024f65a | 2531 | access = "public"; |
6e382aa3 | 2532 | else if (children[v_private] > 0) |
2024f65a | 2533 | access = "private"; |
6e382aa3 | 2534 | else |
2024f65a | 2535 | access = "protected"; |
6e382aa3 | 2536 | break; |
8b93c638 | 2537 | case 1: |
6e382aa3 | 2538 | if (children[v_public] > 0) |
8b93c638 | 2539 | { |
6e382aa3 | 2540 | if (children[v_private] > 0) |
2024f65a | 2541 | access = "private"; |
6e382aa3 | 2542 | else |
2024f65a | 2543 | access = "protected"; |
8b93c638 | 2544 | } |
6e382aa3 | 2545 | else if (children[v_private] > 0) |
2024f65a | 2546 | access = "protected"; |
6e382aa3 | 2547 | break; |
8b93c638 | 2548 | case 2: |
6e382aa3 | 2549 | /* Must be protected */ |
2024f65a | 2550 | access = "protected"; |
6e382aa3 | 2551 | break; |
8b93c638 JM |
2552 | default: |
2553 | /* error! */ | |
2554 | break; | |
2555 | } | |
348144ba MS |
2556 | |
2557 | gdb_assert (access); | |
2024f65a VP |
2558 | if (cname) |
2559 | *cname = xstrdup (access); | |
8b93c638 | 2560 | |
02142340 | 2561 | /* Value and type and full expression are null here. */ |
2024f65a | 2562 | } |
8b93c638 | 2563 | } |
8b93c638 JM |
2564 | else |
2565 | { | |
02142340 | 2566 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
2024f65a VP |
2567 | } |
2568 | } | |
8b93c638 | 2569 | |
2024f65a VP |
2570 | static char * |
2571 | cplus_name_of_child (struct varobj *parent, int index) | |
2572 | { | |
2573 | char *name = NULL; | |
02142340 | 2574 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2575 | return name; |
2576 | } | |
2577 | ||
02142340 VP |
2578 | static char * |
2579 | cplus_path_expr_of_child (struct varobj *child) | |
2580 | { | |
2581 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2582 | &child->path_expr); | |
2583 | return child->path_expr; | |
2584 | } | |
2585 | ||
30b28db1 | 2586 | static struct value * |
fba45db2 | 2587 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2588 | { |
73a93a32 | 2589 | return c_value_of_root (var_handle); |
8b93c638 JM |
2590 | } |
2591 | ||
30b28db1 | 2592 | static struct value * |
fba45db2 | 2593 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2594 | { |
2024f65a | 2595 | struct value *value = NULL; |
02142340 | 2596 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2597 | return value; |
2598 | } | |
2599 | ||
2600 | static struct type * | |
fba45db2 | 2601 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2602 | { |
2024f65a | 2603 | struct type *type = NULL; |
02142340 | 2604 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2605 | return type; |
2606 | } | |
2607 | ||
2608 | static int | |
fba45db2 | 2609 | cplus_variable_editable (struct varobj *var) |
8b93c638 JM |
2610 | { |
2611 | if (CPLUS_FAKE_CHILD (var)) | |
2612 | return 0; | |
2613 | ||
2614 | return c_variable_editable (var); | |
2615 | } | |
2616 | ||
2617 | static char * | |
fba45db2 | 2618 | cplus_value_of_variable (struct varobj *var) |
8b93c638 JM |
2619 | { |
2620 | ||
2621 | /* If we have one of our special types, don't print out | |
2622 | any value. */ | |
2623 | if (CPLUS_FAKE_CHILD (var)) | |
2624 | return xstrdup (""); | |
2625 | ||
2626 | return c_value_of_variable (var); | |
2627 | } | |
2628 | \f | |
2629 | /* Java */ | |
2630 | ||
2631 | static int | |
fba45db2 | 2632 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2633 | { |
2634 | return cplus_number_of_children (var); | |
2635 | } | |
2636 | ||
2637 | static char * | |
fba45db2 | 2638 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2639 | { |
2640 | char *p, *name; | |
2641 | ||
2642 | name = cplus_name_of_variable (parent); | |
2643 | /* If the name has "-" in it, it is because we | |
2644 | needed to escape periods in the name... */ | |
2645 | p = name; | |
2646 | ||
2647 | while (*p != '\000') | |
2648 | { | |
2649 | if (*p == '-') | |
2650 | *p = '.'; | |
2651 | p++; | |
2652 | } | |
2653 | ||
2654 | return name; | |
2655 | } | |
2656 | ||
2657 | static char * | |
fba45db2 | 2658 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2659 | { |
2660 | char *name, *p; | |
2661 | ||
2662 | name = cplus_name_of_child (parent, index); | |
2663 | /* Escape any periods in the name... */ | |
2664 | p = name; | |
2665 | ||
2666 | while (*p != '\000') | |
2667 | { | |
2668 | if (*p == '.') | |
2669 | *p = '-'; | |
2670 | p++; | |
2671 | } | |
2672 | ||
2673 | return name; | |
2674 | } | |
2675 | ||
02142340 VP |
2676 | static char * |
2677 | java_path_expr_of_child (struct varobj *child) | |
2678 | { | |
2679 | return NULL; | |
2680 | } | |
2681 | ||
30b28db1 | 2682 | static struct value * |
fba45db2 | 2683 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2684 | { |
73a93a32 | 2685 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2686 | } |
2687 | ||
30b28db1 | 2688 | static struct value * |
fba45db2 | 2689 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2690 | { |
2691 | return cplus_value_of_child (parent, index); | |
2692 | } | |
2693 | ||
2694 | static struct type * | |
fba45db2 | 2695 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2696 | { |
2697 | return cplus_type_of_child (parent, index); | |
2698 | } | |
2699 | ||
2700 | static int | |
fba45db2 | 2701 | java_variable_editable (struct varobj *var) |
8b93c638 JM |
2702 | { |
2703 | return cplus_variable_editable (var); | |
2704 | } | |
2705 | ||
2706 | static char * | |
fba45db2 | 2707 | java_value_of_variable (struct varobj *var) |
8b93c638 JM |
2708 | { |
2709 | return cplus_value_of_variable (var); | |
2710 | } | |
2711 | \f | |
2712 | extern void _initialize_varobj (void); | |
2713 | void | |
2714 | _initialize_varobj (void) | |
2715 | { | |
2716 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2717 | ||
2718 | varobj_table = xmalloc (sizeof_table); | |
2719 | memset (varobj_table, 0, sizeof_table); | |
2720 | ||
85c07804 AC |
2721 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2722 | &varobjdebug, _("\ | |
2723 | Set varobj debugging."), _("\ | |
2724 | Show varobj debugging."), _("\ | |
2725 | When non-zero, varobj debugging is enabled."), | |
2726 | NULL, | |
920d2a44 | 2727 | show_varobjdebug, |
85c07804 | 2728 | &setlist, &showlist); |
8b93c638 | 2729 | } |
8756216b DP |
2730 | |
2731 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2732 | are defined on globals. | |
2733 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2734 | void | |
2735 | varobj_invalidate (void) | |
2736 | { | |
2737 | struct varobj **all_rootvarobj; | |
2738 | struct varobj **varp; | |
2739 | ||
2740 | if (varobj_list (&all_rootvarobj) > 0) | |
2741 | { | |
2742 | varp = all_rootvarobj; | |
2743 | while (*varp != NULL) | |
2744 | { | |
2745 | /* global var must be re-evaluated. */ | |
2746 | if ((*varp)->root->valid_block == NULL) | |
2747 | { | |
2748 | struct varobj *tmp_var; | |
2749 | ||
2750 | /* Try to create a varobj with same expression. If we succeed replace | |
2751 | the old varobj, otherwise invalidate it. */ | |
2752 | tmp_var = varobj_create (NULL, (*varp)->name, (CORE_ADDR) 0, USE_CURRENT_FRAME); | |
2753 | if (tmp_var != NULL) | |
2754 | { | |
2755 | tmp_var->obj_name = xstrdup ((*varp)->obj_name); | |
2756 | varobj_delete (*varp, NULL, 0); | |
2757 | install_variable (tmp_var); | |
2758 | } | |
2759 | else | |
2760 | (*varp)->root->is_valid = 0; | |
2761 | } | |
2762 | else /* locals must be invalidated. */ | |
2763 | (*varp)->root->is_valid = 0; | |
2764 | ||
2765 | varp++; | |
2766 | } | |
2767 | xfree (all_rootvarobj); | |
2768 | } | |
2769 | return; | |
2770 | } |