Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
9b254dd1 | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
1ecb4ee0 | 4 | Free Software Foundation, Inc. |
8b93c638 JM |
5 | |
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
8b93c638 JM |
9 | (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8b93c638 JM |
18 | |
19 | #include "defs.h" | |
a6c442d8 | 20 | #include "exceptions.h" |
8b93c638 JM |
21 | #include "value.h" |
22 | #include "expression.h" | |
23 | #include "frame.h" | |
8b93c638 JM |
24 | #include "language.h" |
25 | #include "wrapper.h" | |
26 | #include "gdbcmd.h" | |
d2353924 | 27 | #include "block.h" |
a6c442d8 MK |
28 | |
29 | #include "gdb_assert.h" | |
b66d6d2e | 30 | #include "gdb_string.h" |
8b93c638 JM |
31 | |
32 | #include "varobj.h" | |
28335dcc | 33 | #include "vec.h" |
8b93c638 JM |
34 | |
35 | /* Non-zero if we want to see trace of varobj level stuff. */ | |
36 | ||
37 | int varobjdebug = 0; | |
920d2a44 AC |
38 | static void |
39 | show_varobjdebug (struct ui_file *file, int from_tty, | |
40 | struct cmd_list_element *c, const char *value) | |
41 | { | |
42 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
43 | } | |
8b93c638 JM |
44 | |
45 | /* String representations of gdb's format codes */ | |
46 | char *varobj_format_string[] = | |
72330bd6 | 47 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
48 | |
49 | /* String representations of gdb's known languages */ | |
72330bd6 | 50 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
51 | |
52 | /* Data structures */ | |
53 | ||
54 | /* Every root variable has one of these structures saved in its | |
55 | varobj. Members which must be free'd are noted. */ | |
56 | struct varobj_root | |
72330bd6 | 57 | { |
8b93c638 | 58 | |
72330bd6 AC |
59 | /* Alloc'd expression for this parent. */ |
60 | struct expression *exp; | |
8b93c638 | 61 | |
72330bd6 AC |
62 | /* Block for which this expression is valid */ |
63 | struct block *valid_block; | |
8b93c638 | 64 | |
44a67aa7 VP |
65 | /* The frame for this expression. This field is set iff valid_block is |
66 | not NULL. */ | |
e64d9b3d | 67 | struct frame_id frame; |
8b93c638 | 68 | |
72330bd6 AC |
69 | /* If 1, "update" always recomputes the frame & valid block |
70 | using the currently selected frame. */ | |
71 | int use_selected_frame; | |
73a93a32 | 72 | |
8756216b DP |
73 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
74 | to symbols that do not exist anymore. */ | |
75 | int is_valid; | |
76 | ||
72330bd6 AC |
77 | /* Language info for this variable and its children */ |
78 | struct language_specific *lang; | |
8b93c638 | 79 | |
72330bd6 AC |
80 | /* The varobj for this root node. */ |
81 | struct varobj *rootvar; | |
8b93c638 | 82 | |
72330bd6 AC |
83 | /* Next root variable */ |
84 | struct varobj_root *next; | |
85 | }; | |
8b93c638 JM |
86 | |
87 | /* Every variable in the system has a structure of this type defined | |
88 | for it. This structure holds all information necessary to manipulate | |
89 | a particular object variable. Members which must be freed are noted. */ | |
90 | struct varobj | |
72330bd6 | 91 | { |
8b93c638 | 92 | |
72330bd6 AC |
93 | /* Alloc'd name of the variable for this object.. If this variable is a |
94 | child, then this name will be the child's source name. | |
95 | (bar, not foo.bar) */ | |
96 | /* NOTE: This is the "expression" */ | |
97 | char *name; | |
8b93c638 | 98 | |
02142340 VP |
99 | /* Alloc'd expression for this child. Can be used to create a |
100 | root variable corresponding to this child. */ | |
101 | char *path_expr; | |
102 | ||
72330bd6 AC |
103 | /* The alloc'd name for this variable's object. This is here for |
104 | convenience when constructing this object's children. */ | |
105 | char *obj_name; | |
8b93c638 | 106 | |
72330bd6 AC |
107 | /* Index of this variable in its parent or -1 */ |
108 | int index; | |
8b93c638 | 109 | |
202ddcaa VP |
110 | /* The type of this variable. This can be NULL |
111 | for artifial variable objects -- currently, the "accessibility" | |
112 | variable objects in C++. */ | |
72330bd6 | 113 | struct type *type; |
8b93c638 | 114 | |
b20d8971 VP |
115 | /* The value of this expression or subexpression. A NULL value |
116 | indicates there was an error getting this value. | |
b2c2bd75 VP |
117 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
118 | the value is either NULL, or not lazy. */ | |
30b28db1 | 119 | struct value *value; |
8b93c638 | 120 | |
72330bd6 AC |
121 | /* The number of (immediate) children this variable has */ |
122 | int num_children; | |
8b93c638 | 123 | |
72330bd6 AC |
124 | /* If this object is a child, this points to its immediate parent. */ |
125 | struct varobj *parent; | |
8b93c638 | 126 | |
28335dcc VP |
127 | /* Children of this object. */ |
128 | VEC (varobj_p) *children; | |
8b93c638 | 129 | |
72330bd6 AC |
130 | /* Description of the root variable. Points to root variable for children. */ |
131 | struct varobj_root *root; | |
8b93c638 | 132 | |
72330bd6 AC |
133 | /* The format of the output for this object */ |
134 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
135 | |
136 | /* Was this variable updated via a varobj_set_value operation */ | |
137 | int updated; | |
85265413 NR |
138 | |
139 | /* Last print value. */ | |
140 | char *print_value; | |
25d5ea92 VP |
141 | |
142 | /* Is this variable frozen. Frozen variables are never implicitly | |
143 | updated by -var-update * | |
144 | or -var-update <direct-or-indirect-parent>. */ | |
145 | int frozen; | |
146 | ||
147 | /* Is the value of this variable intentionally not fetched? It is | |
148 | not fetched if either the variable is frozen, or any parents is | |
149 | frozen. */ | |
150 | int not_fetched; | |
72330bd6 | 151 | }; |
8b93c638 | 152 | |
8b93c638 | 153 | struct cpstack |
72330bd6 AC |
154 | { |
155 | char *name; | |
156 | struct cpstack *next; | |
157 | }; | |
8b93c638 JM |
158 | |
159 | /* A list of varobjs */ | |
160 | ||
161 | struct vlist | |
72330bd6 AC |
162 | { |
163 | struct varobj *var; | |
164 | struct vlist *next; | |
165 | }; | |
8b93c638 JM |
166 | |
167 | /* Private function prototypes */ | |
168 | ||
169 | /* Helper functions for the above subcommands. */ | |
170 | ||
a14ed312 | 171 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 172 | |
a14ed312 KB |
173 | static void delete_variable_1 (struct cpstack **, int *, |
174 | struct varobj *, int, int); | |
8b93c638 | 175 | |
a14ed312 | 176 | static int install_variable (struct varobj *); |
8b93c638 | 177 | |
a14ed312 | 178 | static void uninstall_variable (struct varobj *); |
8b93c638 | 179 | |
a14ed312 | 180 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 181 | |
8b93c638 JM |
182 | /* Utility routines */ |
183 | ||
a14ed312 | 184 | static struct varobj *new_variable (void); |
8b93c638 | 185 | |
a14ed312 | 186 | static struct varobj *new_root_variable (void); |
8b93c638 | 187 | |
a14ed312 | 188 | static void free_variable (struct varobj *var); |
8b93c638 | 189 | |
74b7792f AC |
190 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
191 | ||
a14ed312 | 192 | static struct type *get_type (struct varobj *var); |
8b93c638 | 193 | |
6e2a9270 VP |
194 | static struct type *get_value_type (struct varobj *var); |
195 | ||
a14ed312 | 196 | static struct type *get_target_type (struct type *); |
8b93c638 | 197 | |
a14ed312 | 198 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 199 | |
a14ed312 | 200 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 201 | |
a14ed312 | 202 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 203 | |
acd65feb VP |
204 | static int install_new_value (struct varobj *var, struct value *value, |
205 | int initial); | |
206 | ||
8b93c638 JM |
207 | /* Language-specific routines. */ |
208 | ||
a14ed312 | 209 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 210 | |
a14ed312 | 211 | static int number_of_children (struct varobj *); |
8b93c638 | 212 | |
a14ed312 | 213 | static char *name_of_variable (struct varobj *); |
8b93c638 | 214 | |
a14ed312 | 215 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 216 | |
30b28db1 | 217 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 218 | |
30b28db1 | 219 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 220 | |
a14ed312 | 221 | static char *my_value_of_variable (struct varobj *var); |
8b93c638 | 222 | |
85265413 NR |
223 | static char *value_get_print_value (struct value *value, |
224 | enum varobj_display_formats format); | |
225 | ||
b2c2bd75 VP |
226 | static int varobj_value_is_changeable_p (struct varobj *var); |
227 | ||
228 | static int is_root_p (struct varobj *var); | |
8b93c638 JM |
229 | |
230 | /* C implementation */ | |
231 | ||
a14ed312 | 232 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 233 | |
a14ed312 | 234 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 235 | |
a14ed312 | 236 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 237 | |
02142340 VP |
238 | static char *c_path_expr_of_child (struct varobj *child); |
239 | ||
30b28db1 | 240 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 241 | |
30b28db1 | 242 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 243 | |
a14ed312 | 244 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 245 | |
a14ed312 | 246 | static char *c_value_of_variable (struct varobj *var); |
8b93c638 JM |
247 | |
248 | /* C++ implementation */ | |
249 | ||
a14ed312 | 250 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 251 | |
a14ed312 | 252 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 253 | |
a14ed312 | 254 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 255 | |
a14ed312 | 256 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 257 | |
02142340 VP |
258 | static char *cplus_path_expr_of_child (struct varobj *child); |
259 | ||
30b28db1 | 260 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 261 | |
30b28db1 | 262 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 263 | |
a14ed312 | 264 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 265 | |
a14ed312 | 266 | static char *cplus_value_of_variable (struct varobj *var); |
8b93c638 JM |
267 | |
268 | /* Java implementation */ | |
269 | ||
a14ed312 | 270 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 271 | |
a14ed312 | 272 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 273 | |
a14ed312 | 274 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 275 | |
02142340 VP |
276 | static char *java_path_expr_of_child (struct varobj *child); |
277 | ||
30b28db1 | 278 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 279 | |
30b28db1 | 280 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 281 | |
a14ed312 | 282 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 283 | |
a14ed312 | 284 | static char *java_value_of_variable (struct varobj *var); |
8b93c638 JM |
285 | |
286 | /* The language specific vector */ | |
287 | ||
288 | struct language_specific | |
72330bd6 | 289 | { |
8b93c638 | 290 | |
72330bd6 AC |
291 | /* The language of this variable */ |
292 | enum varobj_languages language; | |
8b93c638 | 293 | |
72330bd6 AC |
294 | /* The number of children of PARENT. */ |
295 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 296 | |
72330bd6 AC |
297 | /* The name (expression) of a root varobj. */ |
298 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 299 | |
72330bd6 AC |
300 | /* The name of the INDEX'th child of PARENT. */ |
301 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 302 | |
02142340 VP |
303 | /* Returns the rooted expression of CHILD, which is a variable |
304 | obtain that has some parent. */ | |
305 | char *(*path_expr_of_child) (struct varobj * child); | |
306 | ||
30b28db1 AC |
307 | /* The ``struct value *'' of the root variable ROOT. */ |
308 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 309 | |
30b28db1 AC |
310 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
311 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 312 | |
72330bd6 AC |
313 | /* The type of the INDEX'th child of PARENT. */ |
314 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 315 | |
72330bd6 AC |
316 | /* The current value of VAR. */ |
317 | char *(*value_of_variable) (struct varobj * var); | |
318 | }; | |
8b93c638 JM |
319 | |
320 | /* Array of known source language routines. */ | |
d5d6fca5 | 321 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
322 | /* Unknown (try treating as C */ |
323 | { | |
72330bd6 AC |
324 | vlang_unknown, |
325 | c_number_of_children, | |
326 | c_name_of_variable, | |
327 | c_name_of_child, | |
02142340 | 328 | c_path_expr_of_child, |
72330bd6 AC |
329 | c_value_of_root, |
330 | c_value_of_child, | |
331 | c_type_of_child, | |
72330bd6 | 332 | c_value_of_variable} |
8b93c638 JM |
333 | , |
334 | /* C */ | |
335 | { | |
72330bd6 AC |
336 | vlang_c, |
337 | c_number_of_children, | |
338 | c_name_of_variable, | |
339 | c_name_of_child, | |
02142340 | 340 | c_path_expr_of_child, |
72330bd6 AC |
341 | c_value_of_root, |
342 | c_value_of_child, | |
343 | c_type_of_child, | |
72330bd6 | 344 | c_value_of_variable} |
8b93c638 JM |
345 | , |
346 | /* C++ */ | |
347 | { | |
72330bd6 AC |
348 | vlang_cplus, |
349 | cplus_number_of_children, | |
350 | cplus_name_of_variable, | |
351 | cplus_name_of_child, | |
02142340 | 352 | cplus_path_expr_of_child, |
72330bd6 AC |
353 | cplus_value_of_root, |
354 | cplus_value_of_child, | |
355 | cplus_type_of_child, | |
72330bd6 | 356 | cplus_value_of_variable} |
8b93c638 JM |
357 | , |
358 | /* Java */ | |
359 | { | |
72330bd6 AC |
360 | vlang_java, |
361 | java_number_of_children, | |
362 | java_name_of_variable, | |
363 | java_name_of_child, | |
02142340 | 364 | java_path_expr_of_child, |
72330bd6 AC |
365 | java_value_of_root, |
366 | java_value_of_child, | |
367 | java_type_of_child, | |
72330bd6 | 368 | java_value_of_variable} |
8b93c638 JM |
369 | }; |
370 | ||
371 | /* A little convenience enum for dealing with C++/Java */ | |
372 | enum vsections | |
72330bd6 AC |
373 | { |
374 | v_public = 0, v_private, v_protected | |
375 | }; | |
8b93c638 JM |
376 | |
377 | /* Private data */ | |
378 | ||
379 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 380 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
381 | |
382 | /* Header of the list of root variable objects */ | |
383 | static struct varobj_root *rootlist; | |
384 | static int rootcount = 0; /* number of root varobjs in the list */ | |
385 | ||
386 | /* Prime number indicating the number of buckets in the hash table */ | |
387 | /* A prime large enough to avoid too many colisions */ | |
388 | #define VAROBJ_TABLE_SIZE 227 | |
389 | ||
390 | /* Pointer to the varobj hash table (built at run time) */ | |
391 | static struct vlist **varobj_table; | |
392 | ||
8b93c638 JM |
393 | /* Is the variable X one of our "fake" children? */ |
394 | #define CPLUS_FAKE_CHILD(x) \ | |
395 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
396 | \f | |
397 | ||
398 | /* API Implementation */ | |
b2c2bd75 VP |
399 | static int |
400 | is_root_p (struct varobj *var) | |
401 | { | |
402 | return (var->root->rootvar == var); | |
403 | } | |
8b93c638 JM |
404 | |
405 | /* Creates a varobj (not its children) */ | |
406 | ||
7d8547c9 AC |
407 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
408 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
409 | ||
410 | static struct frame_info * | |
411 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
412 | { | |
413 | struct frame_info *frame = NULL; | |
414 | ||
415 | if (frame_addr == (CORE_ADDR) 0) | |
416 | return NULL; | |
417 | ||
418 | while (1) | |
419 | { | |
420 | frame = get_prev_frame (frame); | |
421 | if (frame == NULL) | |
422 | return NULL; | |
eb5492fa | 423 | if (get_frame_base_address (frame) == frame_addr) |
7d8547c9 AC |
424 | return frame; |
425 | } | |
426 | } | |
427 | ||
8b93c638 JM |
428 | struct varobj * |
429 | varobj_create (char *objname, | |
72330bd6 | 430 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
431 | { |
432 | struct varobj *var; | |
2c67cb8b AC |
433 | struct frame_info *fi; |
434 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
435 | struct block *block; |
436 | struct cleanup *old_chain; | |
437 | ||
438 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
439 | var = new_root_variable (); | |
74b7792f | 440 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
441 | |
442 | if (expression != NULL) | |
443 | { | |
444 | char *p; | |
445 | enum varobj_languages lang; | |
e55dccf0 | 446 | struct value *value = NULL; |
02142340 | 447 | int expr_len; |
8b93c638 JM |
448 | |
449 | /* Parse and evaluate the expression, filling in as much | |
450 | of the variable's data as possible */ | |
451 | ||
452 | /* Allow creator to specify context of variable */ | |
72330bd6 | 453 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
206415a3 | 454 | fi = deprecated_safe_get_selected_frame (); |
8b93c638 | 455 | else |
7d8547c9 AC |
456 | /* FIXME: cagney/2002-11-23: This code should be doing a |
457 | lookup using the frame ID and not just the frame's | |
458 | ``address''. This, of course, means an interface change. | |
459 | However, with out that interface change ISAs, such as the | |
460 | ia64 with its two stacks, won't work. Similar goes for the | |
461 | case where there is a frameless function. */ | |
8b93c638 JM |
462 | fi = find_frame_addr_in_frame_chain (frame); |
463 | ||
73a93a32 JI |
464 | /* frame = -2 means always use selected frame */ |
465 | if (type == USE_SELECTED_FRAME) | |
466 | var->root->use_selected_frame = 1; | |
467 | ||
8b93c638 JM |
468 | block = NULL; |
469 | if (fi != NULL) | |
ae767bfb | 470 | block = get_frame_block (fi, 0); |
8b93c638 JM |
471 | |
472 | p = expression; | |
473 | innermost_block = NULL; | |
73a93a32 JI |
474 | /* Wrap the call to parse expression, so we can |
475 | return a sensible error. */ | |
476 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
477 | { | |
478 | return NULL; | |
479 | } | |
8b93c638 JM |
480 | |
481 | /* Don't allow variables to be created for types. */ | |
482 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
483 | { | |
484 | do_cleanups (old_chain); | |
bc8332bb AC |
485 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
486 | " as an expression.\n"); | |
8b93c638 JM |
487 | return NULL; |
488 | } | |
489 | ||
490 | var->format = variable_default_display (var); | |
491 | var->root->valid_block = innermost_block; | |
02142340 VP |
492 | expr_len = strlen (expression); |
493 | var->name = savestring (expression, expr_len); | |
494 | /* For a root var, the name and the expr are the same. */ | |
495 | var->path_expr = savestring (expression, expr_len); | |
8b93c638 JM |
496 | |
497 | /* When the frame is different from the current frame, | |
498 | we must select the appropriate frame before parsing | |
499 | the expression, otherwise the value will not be current. | |
500 | Since select_frame is so benign, just call it for all cases. */ | |
44a67aa7 | 501 | if (innermost_block && fi != NULL) |
8b93c638 | 502 | { |
7a424e99 | 503 | var->root->frame = get_frame_id (fi); |
206415a3 | 504 | old_fi = get_selected_frame (NULL); |
0f7d239c | 505 | select_frame (fi); |
8b93c638 JM |
506 | } |
507 | ||
340a7723 | 508 | /* We definitely need to catch errors here. |
8b93c638 JM |
509 | If evaluate_expression succeeds we got the value we wanted. |
510 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb | 511 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
e55dccf0 VP |
512 | { |
513 | /* Error getting the value. Try to at least get the | |
514 | right type. */ | |
515 | struct value *type_only_value = evaluate_type (var->root->exp); | |
516 | var->type = value_type (type_only_value); | |
517 | } | |
518 | else | |
519 | var->type = value_type (value); | |
acd65feb | 520 | |
acd65feb | 521 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
522 | |
523 | /* Set language info */ | |
524 | lang = variable_language (var); | |
d5d6fca5 | 525 | var->root->lang = &languages[lang]; |
8b93c638 JM |
526 | |
527 | /* Set ourselves as our root */ | |
528 | var->root->rootvar = var; | |
529 | ||
530 | /* Reset the selected frame */ | |
531 | if (fi != NULL) | |
0f7d239c | 532 | select_frame (old_fi); |
8b93c638 JM |
533 | } |
534 | ||
73a93a32 JI |
535 | /* If the variable object name is null, that means this |
536 | is a temporary variable, so don't install it. */ | |
537 | ||
538 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 JM |
539 | { |
540 | var->obj_name = savestring (objname, strlen (objname)); | |
541 | ||
542 | /* If a varobj name is duplicated, the install will fail so | |
543 | we must clenup */ | |
544 | if (!install_variable (var)) | |
545 | { | |
546 | do_cleanups (old_chain); | |
547 | return NULL; | |
548 | } | |
549 | } | |
550 | ||
551 | discard_cleanups (old_chain); | |
552 | return var; | |
553 | } | |
554 | ||
555 | /* Generates an unique name that can be used for a varobj */ | |
556 | ||
557 | char * | |
558 | varobj_gen_name (void) | |
559 | { | |
560 | static int id = 0; | |
e64d9b3d | 561 | char *obj_name; |
8b93c638 JM |
562 | |
563 | /* generate a name for this object */ | |
564 | id++; | |
b435e160 | 565 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 566 | |
e64d9b3d | 567 | return obj_name; |
8b93c638 JM |
568 | } |
569 | ||
570 | /* Given an "objname", returns the pointer to the corresponding varobj | |
571 | or NULL if not found */ | |
572 | ||
573 | struct varobj * | |
574 | varobj_get_handle (char *objname) | |
575 | { | |
576 | struct vlist *cv; | |
577 | const char *chp; | |
578 | unsigned int index = 0; | |
579 | unsigned int i = 1; | |
580 | ||
581 | for (chp = objname; *chp; chp++) | |
582 | { | |
583 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
584 | } | |
585 | ||
586 | cv = *(varobj_table + index); | |
587 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
588 | cv = cv->next; | |
589 | ||
590 | if (cv == NULL) | |
8a3fe4f8 | 591 | error (_("Variable object not found")); |
8b93c638 JM |
592 | |
593 | return cv->var; | |
594 | } | |
595 | ||
596 | /* Given the handle, return the name of the object */ | |
597 | ||
598 | char * | |
599 | varobj_get_objname (struct varobj *var) | |
600 | { | |
601 | return var->obj_name; | |
602 | } | |
603 | ||
604 | /* Given the handle, return the expression represented by the object */ | |
605 | ||
606 | char * | |
607 | varobj_get_expression (struct varobj *var) | |
608 | { | |
609 | return name_of_variable (var); | |
610 | } | |
611 | ||
612 | /* Deletes a varobj and all its children if only_children == 0, | |
613 | otherwise deletes only the children; returns a malloc'ed list of all the | |
614 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
615 | ||
616 | int | |
617 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
618 | { | |
619 | int delcount; | |
620 | int mycount; | |
621 | struct cpstack *result = NULL; | |
622 | char **cp; | |
623 | ||
624 | /* Initialize a stack for temporary results */ | |
625 | cppush (&result, NULL); | |
626 | ||
627 | if (only_children) | |
628 | /* Delete only the variable children */ | |
629 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
630 | else | |
631 | /* Delete the variable and all its children */ | |
632 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
633 | ||
634 | /* We may have been asked to return a list of what has been deleted */ | |
635 | if (dellist != NULL) | |
636 | { | |
637 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
638 | ||
639 | cp = *dellist; | |
640 | mycount = delcount; | |
641 | *cp = cppop (&result); | |
642 | while ((*cp != NULL) && (mycount > 0)) | |
643 | { | |
644 | mycount--; | |
645 | cp++; | |
646 | *cp = cppop (&result); | |
647 | } | |
648 | ||
649 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 650 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 651 | mycount); |
8b93c638 JM |
652 | } |
653 | ||
654 | return delcount; | |
655 | } | |
656 | ||
657 | /* Set/Get variable object display format */ | |
658 | ||
659 | enum varobj_display_formats | |
660 | varobj_set_display_format (struct varobj *var, | |
661 | enum varobj_display_formats format) | |
662 | { | |
663 | switch (format) | |
664 | { | |
665 | case FORMAT_NATURAL: | |
666 | case FORMAT_BINARY: | |
667 | case FORMAT_DECIMAL: | |
668 | case FORMAT_HEXADECIMAL: | |
669 | case FORMAT_OCTAL: | |
670 | var->format = format; | |
671 | break; | |
672 | ||
673 | default: | |
674 | var->format = variable_default_display (var); | |
675 | } | |
676 | ||
ae7d22a6 VP |
677 | if (varobj_value_is_changeable_p (var) |
678 | && var->value && !value_lazy (var->value)) | |
679 | { | |
680 | free (var->print_value); | |
681 | var->print_value = value_get_print_value (var->value, var->format); | |
682 | } | |
683 | ||
8b93c638 JM |
684 | return var->format; |
685 | } | |
686 | ||
687 | enum varobj_display_formats | |
688 | varobj_get_display_format (struct varobj *var) | |
689 | { | |
690 | return var->format; | |
691 | } | |
692 | ||
25d5ea92 VP |
693 | void |
694 | varobj_set_frozen (struct varobj *var, int frozen) | |
695 | { | |
696 | /* When a variable is unfrozen, we don't fetch its value. | |
697 | The 'not_fetched' flag remains set, so next -var-update | |
698 | won't complain. | |
699 | ||
700 | We don't fetch the value, because for structures the client | |
701 | should do -var-update anyway. It would be bad to have different | |
702 | client-size logic for structure and other types. */ | |
703 | var->frozen = frozen; | |
704 | } | |
705 | ||
706 | int | |
707 | varobj_get_frozen (struct varobj *var) | |
708 | { | |
709 | return var->frozen; | |
710 | } | |
711 | ||
712 | ||
8b93c638 JM |
713 | int |
714 | varobj_get_num_children (struct varobj *var) | |
715 | { | |
716 | if (var->num_children == -1) | |
717 | var->num_children = number_of_children (var); | |
718 | ||
719 | return var->num_children; | |
720 | } | |
721 | ||
722 | /* Creates a list of the immediate children of a variable object; | |
723 | the return code is the number of such children or -1 on error */ | |
724 | ||
d56d46f5 VP |
725 | VEC (varobj_p)* |
726 | varobj_list_children (struct varobj *var) | |
8b93c638 JM |
727 | { |
728 | struct varobj *child; | |
729 | char *name; | |
730 | int i; | |
731 | ||
8b93c638 JM |
732 | if (var->num_children == -1) |
733 | var->num_children = number_of_children (var); | |
734 | ||
74a44383 DJ |
735 | /* If that failed, give up. */ |
736 | if (var->num_children == -1) | |
d56d46f5 | 737 | return var->children; |
74a44383 | 738 | |
28335dcc VP |
739 | /* If we're called when the list of children is not yet initialized, |
740 | allocate enough elements in it. */ | |
741 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
742 | VEC_safe_push (varobj_p, var->children, NULL); | |
743 | ||
8b93c638 JM |
744 | for (i = 0; i < var->num_children; i++) |
745 | { | |
d56d46f5 | 746 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
28335dcc VP |
747 | |
748 | if (existing == NULL) | |
749 | { | |
750 | /* Either it's the first call to varobj_list_children for | |
751 | this variable object, and the child was never created, | |
752 | or it was explicitly deleted by the client. */ | |
753 | name = name_of_child (var, i); | |
754 | existing = create_child (var, i, name); | |
755 | VEC_replace (varobj_p, var->children, i, existing); | |
756 | } | |
8b93c638 JM |
757 | } |
758 | ||
d56d46f5 | 759 | return var->children; |
8b93c638 JM |
760 | } |
761 | ||
762 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
763 | prints on the console */ | |
764 | ||
765 | char * | |
766 | varobj_get_type (struct varobj *var) | |
767 | { | |
30b28db1 | 768 | struct value *val; |
8b93c638 JM |
769 | struct cleanup *old_chain; |
770 | struct ui_file *stb; | |
771 | char *thetype; | |
772 | long length; | |
773 | ||
774 | /* For the "fake" variables, do not return a type. (It's type is | |
8756216b DP |
775 | NULL, too.) |
776 | Do not return a type for invalid variables as well. */ | |
777 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
778 | return NULL; |
779 | ||
780 | stb = mem_fileopen (); | |
781 | old_chain = make_cleanup_ui_file_delete (stb); | |
782 | ||
30b28db1 | 783 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
784 | cast it to our type. We then typeprint this variable. */ |
785 | val = value_zero (var->type, not_lval); | |
df407dfe | 786 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
787 | |
788 | thetype = ui_file_xstrdup (stb, &length); | |
789 | do_cleanups (old_chain); | |
790 | return thetype; | |
791 | } | |
792 | ||
1ecb4ee0 DJ |
793 | /* Obtain the type of an object variable. */ |
794 | ||
795 | struct type * | |
796 | varobj_get_gdb_type (struct varobj *var) | |
797 | { | |
798 | return var->type; | |
799 | } | |
800 | ||
02142340 VP |
801 | /* Return a pointer to the full rooted expression of varobj VAR. |
802 | If it has not been computed yet, compute it. */ | |
803 | char * | |
804 | varobj_get_path_expr (struct varobj *var) | |
805 | { | |
806 | if (var->path_expr != NULL) | |
807 | return var->path_expr; | |
808 | else | |
809 | { | |
810 | /* For root varobjs, we initialize path_expr | |
811 | when creating varobj, so here it should be | |
812 | child varobj. */ | |
813 | gdb_assert (!is_root_p (var)); | |
814 | return (*var->root->lang->path_expr_of_child) (var); | |
815 | } | |
816 | } | |
817 | ||
8b93c638 JM |
818 | enum varobj_languages |
819 | varobj_get_language (struct varobj *var) | |
820 | { | |
821 | return variable_language (var); | |
822 | } | |
823 | ||
824 | int | |
825 | varobj_get_attributes (struct varobj *var) | |
826 | { | |
827 | int attributes = 0; | |
828 | ||
340a7723 | 829 | if (varobj_editable_p (var)) |
8b93c638 JM |
830 | /* FIXME: define masks for attributes */ |
831 | attributes |= 0x00000001; /* Editable */ | |
832 | ||
833 | return attributes; | |
834 | } | |
835 | ||
836 | char * | |
837 | varobj_get_value (struct varobj *var) | |
838 | { | |
839 | return my_value_of_variable (var); | |
840 | } | |
841 | ||
842 | /* Set the value of an object variable (if it is editable) to the | |
843 | value of the given expression */ | |
844 | /* Note: Invokes functions that can call error() */ | |
845 | ||
846 | int | |
847 | varobj_set_value (struct varobj *var, char *expression) | |
848 | { | |
30b28db1 | 849 | struct value *val; |
8b93c638 | 850 | int offset = 0; |
a6c442d8 | 851 | int error = 0; |
8b93c638 JM |
852 | |
853 | /* The argument "expression" contains the variable's new value. | |
854 | We need to first construct a legal expression for this -- ugh! */ | |
855 | /* Does this cover all the bases? */ | |
856 | struct expression *exp; | |
30b28db1 | 857 | struct value *value; |
8b93c638 | 858 | int saved_input_radix = input_radix; |
340a7723 NR |
859 | char *s = expression; |
860 | int i; | |
8b93c638 | 861 | |
340a7723 | 862 | gdb_assert (varobj_editable_p (var)); |
8b93c638 | 863 | |
340a7723 NR |
864 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ |
865 | exp = parse_exp_1 (&s, 0, 0); | |
866 | if (!gdb_evaluate_expression (exp, &value)) | |
867 | { | |
868 | /* We cannot proceed without a valid expression. */ | |
869 | xfree (exp); | |
870 | return 0; | |
8b93c638 JM |
871 | } |
872 | ||
340a7723 NR |
873 | /* All types that are editable must also be changeable. */ |
874 | gdb_assert (varobj_value_is_changeable_p (var)); | |
875 | ||
876 | /* The value of a changeable variable object must not be lazy. */ | |
877 | gdb_assert (!value_lazy (var->value)); | |
878 | ||
879 | /* Need to coerce the input. We want to check if the | |
880 | value of the variable object will be different | |
881 | after assignment, and the first thing value_assign | |
882 | does is coerce the input. | |
883 | For example, if we are assigning an array to a pointer variable we | |
884 | should compare the pointer with the the array's address, not with the | |
885 | array's content. */ | |
886 | value = coerce_array (value); | |
887 | ||
888 | /* The new value may be lazy. gdb_value_assign, or | |
889 | rather value_contents, will take care of this. | |
890 | If fetching of the new value will fail, gdb_value_assign | |
891 | with catch the exception. */ | |
892 | if (!gdb_value_assign (var->value, value, &val)) | |
893 | return 0; | |
894 | ||
895 | /* If the value has changed, record it, so that next -var-update can | |
896 | report this change. If a variable had a value of '1', we've set it | |
897 | to '333' and then set again to '1', when -var-update will report this | |
898 | variable as changed -- because the first assignment has set the | |
899 | 'updated' flag. There's no need to optimize that, because return value | |
900 | of -var-update should be considered an approximation. */ | |
901 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
902 | input_radix = saved_input_radix; | |
903 | return 1; | |
8b93c638 JM |
904 | } |
905 | ||
906 | /* Returns a malloc'ed list with all root variable objects */ | |
907 | int | |
908 | varobj_list (struct varobj ***varlist) | |
909 | { | |
910 | struct varobj **cv; | |
911 | struct varobj_root *croot; | |
912 | int mycount = rootcount; | |
913 | ||
914 | /* Alloc (rootcount + 1) entries for the result */ | |
915 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
916 | ||
917 | cv = *varlist; | |
918 | croot = rootlist; | |
919 | while ((croot != NULL) && (mycount > 0)) | |
920 | { | |
921 | *cv = croot->rootvar; | |
922 | mycount--; | |
923 | cv++; | |
924 | croot = croot->next; | |
925 | } | |
926 | /* Mark the end of the list */ | |
927 | *cv = NULL; | |
928 | ||
929 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
930 | warning |
931 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
932 | rootcount, mycount); | |
8b93c638 JM |
933 | |
934 | return rootcount; | |
935 | } | |
936 | ||
acd65feb VP |
937 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
938 | this is the first assignement after the variable object was just | |
939 | created, or changed type. In that case, just assign the value | |
940 | and return 0. | |
941 | Otherwise, assign the value and if type_changeable returns non-zero, | |
942 | find if the new value is different from the current value. | |
b26ed50d VP |
943 | Return 1 if so, and 0 if the values are equal. |
944 | ||
945 | The VALUE parameter should not be released -- the function will | |
946 | take care of releasing it when needed. */ | |
acd65feb VP |
947 | static int |
948 | install_new_value (struct varobj *var, struct value *value, int initial) | |
949 | { | |
950 | int changeable; | |
951 | int need_to_fetch; | |
952 | int changed = 0; | |
25d5ea92 | 953 | int intentionally_not_fetched = 0; |
7a4d50bf | 954 | char *print_value = NULL; |
acd65feb | 955 | |
acd65feb VP |
956 | /* We need to know the varobj's type to decide if the value should |
957 | be fetched or not. C++ fake children (public/protected/private) don't have | |
958 | a type. */ | |
959 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 960 | changeable = varobj_value_is_changeable_p (var); |
acd65feb VP |
961 | need_to_fetch = changeable; |
962 | ||
b26ed50d VP |
963 | /* We are not interested in the address of references, and given |
964 | that in C++ a reference is not rebindable, it cannot | |
965 | meaningfully change. So, get hold of the real value. */ | |
966 | if (value) | |
967 | { | |
968 | value = coerce_ref (value); | |
969 | release_value (value); | |
970 | } | |
971 | ||
acd65feb VP |
972 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
973 | /* For unions, we need to fetch the value implicitly because | |
974 | of implementation of union member fetch. When gdb | |
975 | creates a value for a field and the value of the enclosing | |
976 | structure is not lazy, it immediately copies the necessary | |
977 | bytes from the enclosing values. If the enclosing value is | |
978 | lazy, the call to value_fetch_lazy on the field will read | |
979 | the data from memory. For unions, that means we'll read the | |
980 | same memory more than once, which is not desirable. So | |
981 | fetch now. */ | |
982 | need_to_fetch = 1; | |
983 | ||
984 | /* The new value might be lazy. If the type is changeable, | |
985 | that is we'll be comparing values of this type, fetch the | |
986 | value now. Otherwise, on the next update the old value | |
987 | will be lazy, which means we've lost that old value. */ | |
988 | if (need_to_fetch && value && value_lazy (value)) | |
989 | { | |
25d5ea92 VP |
990 | struct varobj *parent = var->parent; |
991 | int frozen = var->frozen; | |
992 | for (; !frozen && parent; parent = parent->parent) | |
993 | frozen |= parent->frozen; | |
994 | ||
995 | if (frozen && initial) | |
996 | { | |
997 | /* For variables that are frozen, or are children of frozen | |
998 | variables, we don't do fetch on initial assignment. | |
999 | For non-initial assignemnt we do the fetch, since it means we're | |
1000 | explicitly asked to compare the new value with the old one. */ | |
1001 | intentionally_not_fetched = 1; | |
1002 | } | |
1003 | else if (!gdb_value_fetch_lazy (value)) | |
acd65feb | 1004 | { |
acd65feb VP |
1005 | /* Set the value to NULL, so that for the next -var-update, |
1006 | we don't try to compare the new value with this value, | |
1007 | that we couldn't even read. */ | |
1008 | value = NULL; | |
1009 | } | |
acd65feb VP |
1010 | } |
1011 | ||
7a4d50bf VP |
1012 | /* Below, we'll be comparing string rendering of old and new |
1013 | values. Don't get string rendering if the value is | |
1014 | lazy -- if it is, the code above has decided that the value | |
1015 | should not be fetched. */ | |
1016 | if (value && !value_lazy (value)) | |
1017 | print_value = value_get_print_value (value, var->format); | |
1018 | ||
acd65feb VP |
1019 | /* If the type is changeable, compare the old and the new values. |
1020 | If this is the initial assignment, we don't have any old value | |
1021 | to compare with. */ | |
7a4d50bf | 1022 | if (!initial && changeable) |
acd65feb VP |
1023 | { |
1024 | /* If the value of the varobj was changed by -var-set-value, then the | |
1025 | value in the varobj and in the target is the same. However, that value | |
1026 | is different from the value that the varobj had after the previous | |
57e66780 | 1027 | -var-update. So need to the varobj as changed. */ |
acd65feb | 1028 | if (var->updated) |
57e66780 | 1029 | { |
57e66780 DJ |
1030 | changed = 1; |
1031 | } | |
acd65feb VP |
1032 | else |
1033 | { | |
1034 | /* Try to compare the values. That requires that both | |
1035 | values are non-lazy. */ | |
25d5ea92 VP |
1036 | if (var->not_fetched && value_lazy (var->value)) |
1037 | { | |
1038 | /* This is a frozen varobj and the value was never read. | |
1039 | Presumably, UI shows some "never read" indicator. | |
1040 | Now that we've fetched the real value, we need to report | |
1041 | this varobj as changed so that UI can show the real | |
1042 | value. */ | |
1043 | changed = 1; | |
1044 | } | |
1045 | else if (var->value == NULL && value == NULL) | |
acd65feb VP |
1046 | /* Equal. */ |
1047 | ; | |
1048 | else if (var->value == NULL || value == NULL) | |
57e66780 | 1049 | { |
57e66780 DJ |
1050 | changed = 1; |
1051 | } | |
acd65feb VP |
1052 | else |
1053 | { | |
1054 | gdb_assert (!value_lazy (var->value)); | |
1055 | gdb_assert (!value_lazy (value)); | |
85265413 | 1056 | |
57e66780 | 1057 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 | 1058 | if (strcmp (var->print_value, print_value) != 0) |
7a4d50bf | 1059 | changed = 1; |
acd65feb VP |
1060 | } |
1061 | } | |
1062 | } | |
85265413 | 1063 | |
acd65feb | 1064 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1065 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1066 | value_free (var->value); |
1067 | var->value = value; | |
7a4d50bf VP |
1068 | if (var->print_value) |
1069 | xfree (var->print_value); | |
1070 | var->print_value = print_value; | |
25d5ea92 VP |
1071 | if (value && value_lazy (value) && intentionally_not_fetched) |
1072 | var->not_fetched = 1; | |
1073 | else | |
1074 | var->not_fetched = 0; | |
acd65feb | 1075 | var->updated = 0; |
85265413 | 1076 | |
b26ed50d | 1077 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1078 | |
1079 | return changed; | |
1080 | } | |
acd65feb | 1081 | |
8b93c638 JM |
1082 | /* Update the values for a variable and its children. This is a |
1083 | two-pronged attack. First, re-parse the value for the root's | |
1084 | expression to see if it's changed. Then go all the way | |
1085 | through its children, reconstructing them and noting if they've | |
1086 | changed. | |
8756216b DP |
1087 | Return value: |
1088 | < 0 for error values, see varobj.h. | |
1089 | Otherwise it is the number of children + parent changed. | |
8b93c638 | 1090 | |
25d5ea92 VP |
1091 | The EXPLICIT parameter specifies if this call is result |
1092 | of MI request to update this specific variable, or | |
1093 | result of implicit -var-update *. For implicit request, we don't | |
1094 | update frozen variables. | |
705da579 KS |
1095 | |
1096 | NOTE: This function may delete the caller's varobj. If it | |
8756216b DP |
1097 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1098 | to point to the new varobj. */ | |
8b93c638 JM |
1099 | |
1100 | int | |
25d5ea92 VP |
1101 | varobj_update (struct varobj **varp, struct varobj ***changelist, |
1102 | int explicit) | |
8b93c638 JM |
1103 | { |
1104 | int changed = 0; | |
25d5ea92 | 1105 | int type_changed = 0; |
8b93c638 JM |
1106 | int i; |
1107 | int vleft; | |
8b93c638 JM |
1108 | struct varobj *v; |
1109 | struct varobj **cv; | |
2c67cb8b | 1110 | struct varobj **templist = NULL; |
30b28db1 | 1111 | struct value *new; |
28335dcc VP |
1112 | VEC (varobj_p) *stack = NULL; |
1113 | VEC (varobj_p) *result = NULL; | |
e64d9b3d MH |
1114 | struct frame_id old_fid; |
1115 | struct frame_info *fi; | |
8b93c638 | 1116 | |
8756216b | 1117 | /* sanity check: have we been passed a pointer? */ |
a1f42e84 | 1118 | gdb_assert (changelist); |
8b93c638 | 1119 | |
25d5ea92 VP |
1120 | /* Frozen means frozen -- we don't check for any change in |
1121 | this varobj, including its going out of scope, or | |
1122 | changing type. One use case for frozen varobjs is | |
1123 | retaining previously evaluated expressions, and we don't | |
1124 | want them to be reevaluated at all. */ | |
1125 | if (!explicit && (*varp)->frozen) | |
1126 | return 0; | |
8756216b DP |
1127 | |
1128 | if (!(*varp)->root->is_valid) | |
1129 | return INVALID; | |
8b93c638 | 1130 | |
25d5ea92 | 1131 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1132 | { |
25d5ea92 VP |
1133 | /* Save the selected stack frame, since we will need to change it |
1134 | in order to evaluate expressions. */ | |
1135 | old_fid = get_frame_id (deprecated_safe_get_selected_frame ()); | |
1136 | ||
1137 | /* Update the root variable. value_of_root can return NULL | |
1138 | if the variable is no longer around, i.e. we stepped out of | |
1139 | the frame in which a local existed. We are letting the | |
1140 | value_of_root variable dispose of the varobj if the type | |
1141 | has changed. */ | |
1142 | type_changed = 1; | |
1143 | new = value_of_root (varp, &type_changed); | |
1144 | ||
1145 | /* Restore selected frame. */ | |
1146 | fi = frame_find_by_id (old_fid); | |
1147 | if (fi) | |
1148 | select_frame (fi); | |
1149 | ||
1150 | /* If this is a "use_selected_frame" varobj, and its type has changed, | |
1151 | them note that it's changed. */ | |
1152 | if (type_changed) | |
1153 | VEC_safe_push (varobj_p, result, *varp); | |
1154 | ||
1155 | if (install_new_value ((*varp), new, type_changed)) | |
1156 | { | |
1157 | /* If type_changed is 1, install_new_value will never return | |
1158 | non-zero, so we'll never report the same variable twice. */ | |
1159 | gdb_assert (!type_changed); | |
1160 | VEC_safe_push (varobj_p, result, *varp); | |
1161 | } | |
8b93c638 | 1162 | |
25d5ea92 VP |
1163 | if (new == NULL) |
1164 | { | |
1165 | /* This means the varobj itself is out of scope. | |
1166 | Report it. */ | |
1167 | VEC_free (varobj_p, result); | |
1168 | return NOT_IN_SCOPE; | |
1169 | } | |
b20d8971 VP |
1170 | } |
1171 | ||
28335dcc | 1172 | VEC_safe_push (varobj_p, stack, *varp); |
8b93c638 | 1173 | |
8756216b | 1174 | /* Walk through the children, reconstructing them all. */ |
28335dcc | 1175 | while (!VEC_empty (varobj_p, stack)) |
8b93c638 | 1176 | { |
28335dcc VP |
1177 | v = VEC_pop (varobj_p, stack); |
1178 | ||
1179 | /* Push any children. Use reverse order so that the first | |
1180 | child is popped from the work stack first, and so | |
1181 | will be added to result first. This does not | |
1182 | affect correctness, just "nicer". */ | |
1183 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1184 | { |
28335dcc VP |
1185 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1186 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
25d5ea92 | 1187 | if (c != NULL && !c->frozen) |
28335dcc | 1188 | VEC_safe_push (varobj_p, stack, c); |
8b93c638 JM |
1189 | } |
1190 | ||
28335dcc VP |
1191 | /* Update this variable, unless it's a root, which is already |
1192 | updated. */ | |
25d5ea92 | 1193 | if (v->root->rootvar != v) |
28335dcc VP |
1194 | { |
1195 | new = value_of_child (v->parent, v->index); | |
1196 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1197 | { | |
1198 | /* Note that it's changed */ | |
1199 | VEC_safe_push (varobj_p, result, v); | |
1200 | v->updated = 0; | |
1201 | } | |
8b93c638 | 1202 | } |
8b93c638 JM |
1203 | } |
1204 | ||
8756216b | 1205 | /* Alloc (changed + 1) list entries. */ |
28335dcc | 1206 | changed = VEC_length (varobj_p, result); |
8b93c638 | 1207 | *changelist = xmalloc ((changed + 1) * sizeof (struct varobj *)); |
28335dcc | 1208 | cv = *changelist; |
8b93c638 | 1209 | |
28335dcc | 1210 | for (i = 0; i < changed; ++i) |
8b93c638 | 1211 | { |
28335dcc VP |
1212 | *cv = VEC_index (varobj_p, result, i); |
1213 | gdb_assert (*cv != NULL); | |
1214 | ++cv; | |
8b93c638 | 1215 | } |
28335dcc | 1216 | *cv = 0; |
8b93c638 | 1217 | |
93b979d6 NR |
1218 | VEC_free (varobj_p, stack); |
1219 | VEC_free (varobj_p, result); | |
1220 | ||
73a93a32 | 1221 | if (type_changed) |
8756216b | 1222 | return TYPE_CHANGED; |
73a93a32 JI |
1223 | else |
1224 | return changed; | |
8b93c638 JM |
1225 | } |
1226 | \f | |
1227 | ||
1228 | /* Helper functions */ | |
1229 | ||
1230 | /* | |
1231 | * Variable object construction/destruction | |
1232 | */ | |
1233 | ||
1234 | static int | |
fba45db2 KB |
1235 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1236 | int only_children_p) | |
8b93c638 JM |
1237 | { |
1238 | int delcount = 0; | |
1239 | ||
1240 | delete_variable_1 (resultp, &delcount, var, | |
1241 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1242 | ||
1243 | return delcount; | |
1244 | } | |
1245 | ||
1246 | /* Delete the variable object VAR and its children */ | |
1247 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1248 | and the parent is not removed we dump core. It must be always | |
1249 | initially called with remove_from_parent_p set */ | |
1250 | static void | |
72330bd6 AC |
1251 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1252 | struct varobj *var, int only_children_p, | |
1253 | int remove_from_parent_p) | |
8b93c638 | 1254 | { |
28335dcc | 1255 | int i; |
8b93c638 JM |
1256 | |
1257 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1258 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1259 | { | |
1260 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
214270ab VP |
1261 | if (!child) |
1262 | continue; | |
8b93c638 | 1263 | if (!remove_from_parent_p) |
28335dcc VP |
1264 | child->parent = NULL; |
1265 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1266 | } |
28335dcc | 1267 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1268 | |
1269 | /* if we were called to delete only the children we are done here */ | |
1270 | if (only_children_p) | |
1271 | return; | |
1272 | ||
1273 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1274 | /* If the name is null, this is a temporary variable, that has not |
1275 | yet been installed, don't report it, it belongs to the caller... */ | |
1276 | if (var->obj_name != NULL) | |
8b93c638 | 1277 | { |
5b616ba1 | 1278 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1279 | *delcountp = *delcountp + 1; |
1280 | } | |
1281 | ||
1282 | /* If this variable has a parent, remove it from its parent's list */ | |
1283 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1284 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1285 | expensive list search to find the element to remove when we are | |
1286 | discarding the list afterwards */ | |
72330bd6 | 1287 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1288 | { |
28335dcc | 1289 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1290 | } |
72330bd6 | 1291 | |
73a93a32 JI |
1292 | if (var->obj_name != NULL) |
1293 | uninstall_variable (var); | |
8b93c638 JM |
1294 | |
1295 | /* Free memory associated with this variable */ | |
1296 | free_variable (var); | |
1297 | } | |
1298 | ||
1299 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1300 | static int | |
fba45db2 | 1301 | install_variable (struct varobj *var) |
8b93c638 JM |
1302 | { |
1303 | struct vlist *cv; | |
1304 | struct vlist *newvl; | |
1305 | const char *chp; | |
1306 | unsigned int index = 0; | |
1307 | unsigned int i = 1; | |
1308 | ||
1309 | for (chp = var->obj_name; *chp; chp++) | |
1310 | { | |
1311 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1312 | } | |
1313 | ||
1314 | cv = *(varobj_table + index); | |
1315 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1316 | cv = cv->next; | |
1317 | ||
1318 | if (cv != NULL) | |
8a3fe4f8 | 1319 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1320 | |
1321 | /* Add varobj to hash table */ | |
1322 | newvl = xmalloc (sizeof (struct vlist)); | |
1323 | newvl->next = *(varobj_table + index); | |
1324 | newvl->var = var; | |
1325 | *(varobj_table + index) = newvl; | |
1326 | ||
1327 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1328 | if (is_root_p (var)) |
8b93c638 JM |
1329 | { |
1330 | /* Add to list of root variables */ | |
1331 | if (rootlist == NULL) | |
1332 | var->root->next = NULL; | |
1333 | else | |
1334 | var->root->next = rootlist; | |
1335 | rootlist = var->root; | |
1336 | rootcount++; | |
1337 | } | |
1338 | ||
1339 | return 1; /* OK */ | |
1340 | } | |
1341 | ||
1342 | /* Unistall the object VAR. */ | |
1343 | static void | |
fba45db2 | 1344 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1345 | { |
1346 | struct vlist *cv; | |
1347 | struct vlist *prev; | |
1348 | struct varobj_root *cr; | |
1349 | struct varobj_root *prer; | |
1350 | const char *chp; | |
1351 | unsigned int index = 0; | |
1352 | unsigned int i = 1; | |
1353 | ||
1354 | /* Remove varobj from hash table */ | |
1355 | for (chp = var->obj_name; *chp; chp++) | |
1356 | { | |
1357 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1358 | } | |
1359 | ||
1360 | cv = *(varobj_table + index); | |
1361 | prev = NULL; | |
1362 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1363 | { | |
1364 | prev = cv; | |
1365 | cv = cv->next; | |
1366 | } | |
1367 | ||
1368 | if (varobjdebug) | |
1369 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1370 | ||
1371 | if (cv == NULL) | |
1372 | { | |
72330bd6 AC |
1373 | warning |
1374 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1375 | var->obj_name); | |
8b93c638 JM |
1376 | return; |
1377 | } | |
1378 | ||
1379 | if (prev == NULL) | |
1380 | *(varobj_table + index) = cv->next; | |
1381 | else | |
1382 | prev->next = cv->next; | |
1383 | ||
b8c9b27d | 1384 | xfree (cv); |
8b93c638 JM |
1385 | |
1386 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1387 | if (is_root_p (var)) |
8b93c638 JM |
1388 | { |
1389 | /* Remove from list of root variables */ | |
1390 | if (rootlist == var->root) | |
1391 | rootlist = var->root->next; | |
1392 | else | |
1393 | { | |
1394 | prer = NULL; | |
1395 | cr = rootlist; | |
1396 | while ((cr != NULL) && (cr->rootvar != var)) | |
1397 | { | |
1398 | prer = cr; | |
1399 | cr = cr->next; | |
1400 | } | |
1401 | if (cr == NULL) | |
1402 | { | |
72330bd6 AC |
1403 | warning |
1404 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1405 | var->obj_name); | |
8b93c638 JM |
1406 | return; |
1407 | } | |
1408 | if (prer == NULL) | |
1409 | rootlist = NULL; | |
1410 | else | |
1411 | prer->next = cr->next; | |
1412 | } | |
1413 | rootcount--; | |
1414 | } | |
1415 | ||
1416 | } | |
1417 | ||
8b93c638 JM |
1418 | /* Create and install a child of the parent of the given name */ |
1419 | static struct varobj * | |
fba45db2 | 1420 | create_child (struct varobj *parent, int index, char *name) |
8b93c638 JM |
1421 | { |
1422 | struct varobj *child; | |
1423 | char *childs_name; | |
acd65feb | 1424 | struct value *value; |
8b93c638 JM |
1425 | |
1426 | child = new_variable (); | |
1427 | ||
1428 | /* name is allocated by name_of_child */ | |
1429 | child->name = name; | |
1430 | child->index = index; | |
acd65feb | 1431 | value = value_of_child (parent, index); |
8b93c638 JM |
1432 | child->parent = parent; |
1433 | child->root = parent->root; | |
b435e160 | 1434 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1435 | child->obj_name = childs_name; |
1436 | install_variable (child); | |
1437 | ||
acd65feb VP |
1438 | /* Compute the type of the child. Must do this before |
1439 | calling install_new_value. */ | |
1440 | if (value != NULL) | |
1441 | /* If the child had no evaluation errors, var->value | |
1442 | will be non-NULL and contain a valid type. */ | |
1443 | child->type = value_type (value); | |
1444 | else | |
1445 | /* Otherwise, we must compute the type. */ | |
1446 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1447 | child->index); | |
1448 | install_new_value (child, value, 1); | |
1449 | ||
8b93c638 JM |
1450 | return child; |
1451 | } | |
8b93c638 JM |
1452 | \f |
1453 | ||
1454 | /* | |
1455 | * Miscellaneous utility functions. | |
1456 | */ | |
1457 | ||
1458 | /* Allocate memory and initialize a new variable */ | |
1459 | static struct varobj * | |
1460 | new_variable (void) | |
1461 | { | |
1462 | struct varobj *var; | |
1463 | ||
1464 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1465 | var->name = NULL; | |
02142340 | 1466 | var->path_expr = NULL; |
8b93c638 JM |
1467 | var->obj_name = NULL; |
1468 | var->index = -1; | |
1469 | var->type = NULL; | |
1470 | var->value = NULL; | |
8b93c638 JM |
1471 | var->num_children = -1; |
1472 | var->parent = NULL; | |
1473 | var->children = NULL; | |
1474 | var->format = 0; | |
1475 | var->root = NULL; | |
fb9b6b35 | 1476 | var->updated = 0; |
85265413 | 1477 | var->print_value = NULL; |
25d5ea92 VP |
1478 | var->frozen = 0; |
1479 | var->not_fetched = 0; | |
8b93c638 JM |
1480 | |
1481 | return var; | |
1482 | } | |
1483 | ||
1484 | /* Allocate memory and initialize a new root variable */ | |
1485 | static struct varobj * | |
1486 | new_root_variable (void) | |
1487 | { | |
1488 | struct varobj *var = new_variable (); | |
1489 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1490 | var->root->lang = NULL; | |
1491 | var->root->exp = NULL; | |
1492 | var->root->valid_block = NULL; | |
7a424e99 | 1493 | var->root->frame = null_frame_id; |
73a93a32 | 1494 | var->root->use_selected_frame = 0; |
8b93c638 | 1495 | var->root->rootvar = NULL; |
8756216b | 1496 | var->root->is_valid = 1; |
8b93c638 JM |
1497 | |
1498 | return var; | |
1499 | } | |
1500 | ||
1501 | /* Free any allocated memory associated with VAR. */ | |
1502 | static void | |
fba45db2 | 1503 | free_variable (struct varobj *var) |
8b93c638 JM |
1504 | { |
1505 | /* Free the expression if this is a root variable. */ | |
b2c2bd75 | 1506 | if (is_root_p (var)) |
8b93c638 | 1507 | { |
96c1eda2 | 1508 | free_current_contents (&var->root->exp); |
8038e1e2 | 1509 | xfree (var->root); |
8b93c638 JM |
1510 | } |
1511 | ||
8038e1e2 AC |
1512 | xfree (var->name); |
1513 | xfree (var->obj_name); | |
85265413 | 1514 | xfree (var->print_value); |
02142340 | 1515 | xfree (var->path_expr); |
8038e1e2 | 1516 | xfree (var); |
8b93c638 JM |
1517 | } |
1518 | ||
74b7792f AC |
1519 | static void |
1520 | do_free_variable_cleanup (void *var) | |
1521 | { | |
1522 | free_variable (var); | |
1523 | } | |
1524 | ||
1525 | static struct cleanup * | |
1526 | make_cleanup_free_variable (struct varobj *var) | |
1527 | { | |
1528 | return make_cleanup (do_free_variable_cleanup, var); | |
1529 | } | |
1530 | ||
6766a268 DJ |
1531 | /* This returns the type of the variable. It also skips past typedefs |
1532 | to return the real type of the variable. | |
94b66fa7 KS |
1533 | |
1534 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1535 | except within get_target_type and get_type. */ | |
8b93c638 | 1536 | static struct type * |
fba45db2 | 1537 | get_type (struct varobj *var) |
8b93c638 JM |
1538 | { |
1539 | struct type *type; | |
1540 | type = var->type; | |
1541 | ||
6766a268 DJ |
1542 | if (type != NULL) |
1543 | type = check_typedef (type); | |
8b93c638 JM |
1544 | |
1545 | return type; | |
1546 | } | |
1547 | ||
6e2a9270 VP |
1548 | /* Return the type of the value that's stored in VAR, |
1549 | or that would have being stored there if the | |
1550 | value were accessible. | |
1551 | ||
1552 | This differs from VAR->type in that VAR->type is always | |
1553 | the true type of the expession in the source language. | |
1554 | The return value of this function is the type we're | |
1555 | actually storing in varobj, and using for displaying | |
1556 | the values and for comparing previous and new values. | |
1557 | ||
1558 | For example, top-level references are always stripped. */ | |
1559 | static struct type * | |
1560 | get_value_type (struct varobj *var) | |
1561 | { | |
1562 | struct type *type; | |
1563 | ||
1564 | if (var->value) | |
1565 | type = value_type (var->value); | |
1566 | else | |
1567 | type = var->type; | |
1568 | ||
1569 | type = check_typedef (type); | |
1570 | ||
1571 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1572 | type = get_target_type (type); | |
1573 | ||
1574 | type = check_typedef (type); | |
1575 | ||
1576 | return type; | |
1577 | } | |
1578 | ||
8b93c638 | 1579 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
1580 | past typedefs, just like get_type (). |
1581 | ||
1582 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1583 | except within get_target_type and get_type. */ | |
8b93c638 | 1584 | static struct type * |
fba45db2 | 1585 | get_target_type (struct type *type) |
8b93c638 JM |
1586 | { |
1587 | if (type != NULL) | |
1588 | { | |
1589 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1590 | if (type != NULL) |
1591 | type = check_typedef (type); | |
8b93c638 JM |
1592 | } |
1593 | ||
1594 | return type; | |
1595 | } | |
1596 | ||
1597 | /* What is the default display for this variable? We assume that | |
1598 | everything is "natural". Any exceptions? */ | |
1599 | static enum varobj_display_formats | |
fba45db2 | 1600 | variable_default_display (struct varobj *var) |
8b93c638 JM |
1601 | { |
1602 | return FORMAT_NATURAL; | |
1603 | } | |
1604 | ||
8b93c638 JM |
1605 | /* FIXME: The following should be generic for any pointer */ |
1606 | static void | |
fba45db2 | 1607 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
1608 | { |
1609 | struct cpstack *s; | |
1610 | ||
1611 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1612 | s->name = name; | |
1613 | s->next = *pstack; | |
1614 | *pstack = s; | |
1615 | } | |
1616 | ||
1617 | /* FIXME: The following should be generic for any pointer */ | |
1618 | static char * | |
fba45db2 | 1619 | cppop (struct cpstack **pstack) |
8b93c638 JM |
1620 | { |
1621 | struct cpstack *s; | |
1622 | char *v; | |
1623 | ||
1624 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1625 | return NULL; | |
1626 | ||
1627 | s = *pstack; | |
1628 | v = s->name; | |
1629 | *pstack = (*pstack)->next; | |
b8c9b27d | 1630 | xfree (s); |
8b93c638 JM |
1631 | |
1632 | return v; | |
1633 | } | |
1634 | \f | |
1635 | /* | |
1636 | * Language-dependencies | |
1637 | */ | |
1638 | ||
1639 | /* Common entry points */ | |
1640 | ||
1641 | /* Get the language of variable VAR. */ | |
1642 | static enum varobj_languages | |
fba45db2 | 1643 | variable_language (struct varobj *var) |
8b93c638 JM |
1644 | { |
1645 | enum varobj_languages lang; | |
1646 | ||
1647 | switch (var->root->exp->language_defn->la_language) | |
1648 | { | |
1649 | default: | |
1650 | case language_c: | |
1651 | lang = vlang_c; | |
1652 | break; | |
1653 | case language_cplus: | |
1654 | lang = vlang_cplus; | |
1655 | break; | |
1656 | case language_java: | |
1657 | lang = vlang_java; | |
1658 | break; | |
1659 | } | |
1660 | ||
1661 | return lang; | |
1662 | } | |
1663 | ||
1664 | /* Return the number of children for a given variable. | |
1665 | The result of this function is defined by the language | |
1666 | implementation. The number of children returned by this function | |
1667 | is the number of children that the user will see in the variable | |
1668 | display. */ | |
1669 | static int | |
fba45db2 | 1670 | number_of_children (struct varobj *var) |
8b93c638 JM |
1671 | { |
1672 | return (*var->root->lang->number_of_children) (var);; | |
1673 | } | |
1674 | ||
1675 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1676 | static char * | |
fba45db2 | 1677 | name_of_variable (struct varobj *var) |
8b93c638 JM |
1678 | { |
1679 | return (*var->root->lang->name_of_variable) (var); | |
1680 | } | |
1681 | ||
1682 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1683 | static char * | |
fba45db2 | 1684 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
1685 | { |
1686 | return (*var->root->lang->name_of_child) (var, index); | |
1687 | } | |
1688 | ||
30b28db1 | 1689 | /* What is the ``struct value *'' of the root variable VAR? |
73a93a32 JI |
1690 | TYPE_CHANGED controls what to do if the type of a |
1691 | use_selected_frame = 1 variable changes. On input, | |
1692 | TYPE_CHANGED = 1 means discard the old varobj, and replace | |
1693 | it with this one. TYPE_CHANGED = 0 means leave it around. | |
1694 | NB: In both cases, var_handle will point to the new varobj, | |
1695 | so if you use TYPE_CHANGED = 0, you will have to stash the | |
1696 | old varobj pointer away somewhere before calling this. | |
1697 | On return, TYPE_CHANGED will be 1 if the type has changed, and | |
1698 | 0 otherwise. */ | |
30b28db1 | 1699 | static struct value * |
fba45db2 | 1700 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 1701 | { |
73a93a32 JI |
1702 | struct varobj *var; |
1703 | ||
1704 | if (var_handle == NULL) | |
1705 | return NULL; | |
1706 | ||
1707 | var = *var_handle; | |
1708 | ||
1709 | /* This should really be an exception, since this should | |
1710 | only get called with a root variable. */ | |
1711 | ||
b2c2bd75 | 1712 | if (!is_root_p (var)) |
73a93a32 JI |
1713 | return NULL; |
1714 | ||
1715 | if (var->root->use_selected_frame) | |
1716 | { | |
1717 | struct varobj *tmp_var; | |
1718 | char *old_type, *new_type; | |
6225abfa | 1719 | |
73a93a32 JI |
1720 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
1721 | USE_SELECTED_FRAME); | |
1722 | if (tmp_var == NULL) | |
1723 | { | |
1724 | return NULL; | |
1725 | } | |
6225abfa | 1726 | old_type = varobj_get_type (var); |
73a93a32 | 1727 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 1728 | if (strcmp (old_type, new_type) == 0) |
73a93a32 JI |
1729 | { |
1730 | varobj_delete (tmp_var, NULL, 0); | |
1731 | *type_changed = 0; | |
1732 | } | |
1733 | else | |
1734 | { | |
1735 | if (*type_changed) | |
1736 | { | |
72330bd6 | 1737 | tmp_var->obj_name = |
73a93a32 | 1738 | savestring (var->obj_name, strlen (var->obj_name)); |
f7635dd9 | 1739 | varobj_delete (var, NULL, 0); |
73a93a32 JI |
1740 | } |
1741 | else | |
1742 | { | |
72330bd6 | 1743 | tmp_var->obj_name = varobj_gen_name (); |
73a93a32 JI |
1744 | } |
1745 | install_variable (tmp_var); | |
1746 | *var_handle = tmp_var; | |
705da579 | 1747 | var = *var_handle; |
73a93a32 JI |
1748 | *type_changed = 1; |
1749 | } | |
74dddad3 MS |
1750 | xfree (old_type); |
1751 | xfree (new_type); | |
73a93a32 JI |
1752 | } |
1753 | else | |
1754 | { | |
1755 | *type_changed = 0; | |
1756 | } | |
1757 | ||
1758 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1759 | } |
1760 | ||
30b28db1 AC |
1761 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
1762 | static struct value * | |
fba45db2 | 1763 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 1764 | { |
30b28db1 | 1765 | struct value *value; |
8b93c638 JM |
1766 | |
1767 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1768 | ||
8b93c638 JM |
1769 | return value; |
1770 | } | |
1771 | ||
8b93c638 JM |
1772 | /* GDB already has a command called "value_of_variable". Sigh. */ |
1773 | static char * | |
fba45db2 | 1774 | my_value_of_variable (struct varobj *var) |
8b93c638 | 1775 | { |
8756216b DP |
1776 | if (var->root->is_valid) |
1777 | return (*var->root->lang->value_of_variable) (var); | |
1778 | else | |
1779 | return NULL; | |
8b93c638 JM |
1780 | } |
1781 | ||
85265413 NR |
1782 | static char * |
1783 | value_get_print_value (struct value *value, enum varobj_display_formats format) | |
1784 | { | |
1785 | long dummy; | |
57e66780 DJ |
1786 | struct ui_file *stb; |
1787 | struct cleanup *old_chain; | |
85265413 | 1788 | char *thevalue; |
57e66780 DJ |
1789 | |
1790 | if (value == NULL) | |
1791 | return NULL; | |
1792 | ||
1793 | stb = mem_fileopen (); | |
1794 | old_chain = make_cleanup_ui_file_delete (stb); | |
1795 | ||
85265413 NR |
1796 | common_val_print (value, stb, format_code[(int) format], 1, 0, 0); |
1797 | thevalue = ui_file_xstrdup (stb, &dummy); | |
57e66780 | 1798 | |
85265413 NR |
1799 | do_cleanups (old_chain); |
1800 | return thevalue; | |
1801 | } | |
1802 | ||
340a7723 NR |
1803 | int |
1804 | varobj_editable_p (struct varobj *var) | |
1805 | { | |
1806 | struct type *type; | |
1807 | struct value *value; | |
1808 | ||
1809 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) | |
1810 | return 0; | |
1811 | ||
1812 | type = get_value_type (var); | |
1813 | ||
1814 | switch (TYPE_CODE (type)) | |
1815 | { | |
1816 | case TYPE_CODE_STRUCT: | |
1817 | case TYPE_CODE_UNION: | |
1818 | case TYPE_CODE_ARRAY: | |
1819 | case TYPE_CODE_FUNC: | |
1820 | case TYPE_CODE_METHOD: | |
1821 | return 0; | |
1822 | break; | |
1823 | ||
1824 | default: | |
1825 | return 1; | |
1826 | break; | |
1827 | } | |
1828 | } | |
1829 | ||
acd65feb VP |
1830 | /* Return non-zero if changes in value of VAR |
1831 | must be detected and reported by -var-update. | |
1832 | Return zero is -var-update should never report | |
1833 | changes of such values. This makes sense for structures | |
1834 | (since the changes in children values will be reported separately), | |
1835 | or for artifical objects (like 'public' pseudo-field in C++). | |
1836 | ||
1837 | Return value of 0 means that gdb need not call value_fetch_lazy | |
1838 | for the value of this variable object. */ | |
8b93c638 | 1839 | static int |
b2c2bd75 | 1840 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
1841 | { |
1842 | int r; | |
1843 | struct type *type; | |
1844 | ||
1845 | if (CPLUS_FAKE_CHILD (var)) | |
1846 | return 0; | |
1847 | ||
6e2a9270 | 1848 | type = get_value_type (var); |
8b93c638 JM |
1849 | |
1850 | switch (TYPE_CODE (type)) | |
1851 | { | |
72330bd6 AC |
1852 | case TYPE_CODE_STRUCT: |
1853 | case TYPE_CODE_UNION: | |
1854 | case TYPE_CODE_ARRAY: | |
1855 | r = 0; | |
1856 | break; | |
8b93c638 | 1857 | |
72330bd6 AC |
1858 | default: |
1859 | r = 1; | |
8b93c638 JM |
1860 | } |
1861 | ||
1862 | return r; | |
1863 | } | |
1864 | ||
2024f65a VP |
1865 | /* Given the value and the type of a variable object, |
1866 | adjust the value and type to those necessary | |
1867 | for getting children of the variable object. | |
1868 | This includes dereferencing top-level references | |
1869 | to all types and dereferencing pointers to | |
1870 | structures. | |
1871 | ||
1872 | Both TYPE and *TYPE should be non-null. VALUE | |
1873 | can be null if we want to only translate type. | |
1874 | *VALUE can be null as well -- if the parent | |
02142340 VP |
1875 | value is not known. |
1876 | ||
1877 | If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1 | |
1878 | depending on whether pointer was deferenced | |
1879 | in this function. */ | |
2024f65a VP |
1880 | static void |
1881 | adjust_value_for_child_access (struct value **value, | |
02142340 VP |
1882 | struct type **type, |
1883 | int *was_ptr) | |
2024f65a VP |
1884 | { |
1885 | gdb_assert (type && *type); | |
1886 | ||
02142340 VP |
1887 | if (was_ptr) |
1888 | *was_ptr = 0; | |
1889 | ||
2024f65a VP |
1890 | *type = check_typedef (*type); |
1891 | ||
1892 | /* The type of value stored in varobj, that is passed | |
1893 | to us, is already supposed to be | |
1894 | reference-stripped. */ | |
1895 | ||
1896 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
1897 | ||
1898 | /* Pointers to structures are treated just like | |
1899 | structures when accessing children. Don't | |
1900 | dererences pointers to other types. */ | |
1901 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
1902 | { | |
1903 | struct type *target_type = get_target_type (*type); | |
1904 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
1905 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
1906 | { | |
1907 | if (value && *value) | |
3f4178d6 DJ |
1908 | { |
1909 | int success = gdb_value_ind (*value, value); | |
1910 | if (!success) | |
1911 | *value = NULL; | |
1912 | } | |
2024f65a | 1913 | *type = target_type; |
02142340 VP |
1914 | if (was_ptr) |
1915 | *was_ptr = 1; | |
2024f65a VP |
1916 | } |
1917 | } | |
1918 | ||
1919 | /* The 'get_target_type' function calls check_typedef on | |
1920 | result, so we can immediately check type code. No | |
1921 | need to call check_typedef here. */ | |
1922 | } | |
1923 | ||
8b93c638 JM |
1924 | /* C */ |
1925 | static int | |
fba45db2 | 1926 | c_number_of_children (struct varobj *var) |
8b93c638 | 1927 | { |
2024f65a VP |
1928 | struct type *type = get_value_type (var); |
1929 | int children = 0; | |
8b93c638 | 1930 | struct type *target; |
8b93c638 | 1931 | |
02142340 | 1932 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 | 1933 | target = get_target_type (type); |
8b93c638 JM |
1934 | |
1935 | switch (TYPE_CODE (type)) | |
1936 | { | |
1937 | case TYPE_CODE_ARRAY: | |
1938 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
72330bd6 | 1939 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) |
8b93c638 JM |
1940 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
1941 | else | |
74a44383 DJ |
1942 | /* If we don't know how many elements there are, don't display |
1943 | any. */ | |
1944 | children = 0; | |
8b93c638 JM |
1945 | break; |
1946 | ||
1947 | case TYPE_CODE_STRUCT: | |
1948 | case TYPE_CODE_UNION: | |
1949 | children = TYPE_NFIELDS (type); | |
1950 | break; | |
1951 | ||
1952 | case TYPE_CODE_PTR: | |
2024f65a VP |
1953 | /* The type here is a pointer to non-struct. Typically, pointers |
1954 | have one child, except for function ptrs, which have no children, | |
1955 | and except for void*, as we don't know what to show. | |
1956 | ||
0755e6c1 FN |
1957 | We can show char* so we allow it to be dereferenced. If you decide |
1958 | to test for it, please mind that a little magic is necessary to | |
1959 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
1960 | TYPE_NAME == "char" */ | |
2024f65a VP |
1961 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
1962 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
1963 | children = 0; | |
1964 | else | |
1965 | children = 1; | |
8b93c638 JM |
1966 | break; |
1967 | ||
1968 | default: | |
1969 | /* Other types have no children */ | |
1970 | break; | |
1971 | } | |
1972 | ||
1973 | return children; | |
1974 | } | |
1975 | ||
1976 | static char * | |
fba45db2 | 1977 | c_name_of_variable (struct varobj *parent) |
8b93c638 JM |
1978 | { |
1979 | return savestring (parent->name, strlen (parent->name)); | |
1980 | } | |
1981 | ||
bbec2603 VP |
1982 | /* Return the value of element TYPE_INDEX of a structure |
1983 | value VALUE. VALUE's type should be a structure, | |
1984 | or union, or a typedef to struct/union. | |
1985 | ||
1986 | Returns NULL if getting the value fails. Never throws. */ | |
1987 | static struct value * | |
1988 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 1989 | { |
bbec2603 VP |
1990 | struct value *result = NULL; |
1991 | volatile struct gdb_exception e; | |
8b93c638 | 1992 | |
bbec2603 VP |
1993 | struct type *type = value_type (value); |
1994 | type = check_typedef (type); | |
1995 | ||
1996 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
1997 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 1998 | |
bbec2603 VP |
1999 | TRY_CATCH (e, RETURN_MASK_ERROR) |
2000 | { | |
2001 | if (TYPE_FIELD_STATIC (type, type_index)) | |
2002 | result = value_static_field (type, type_index); | |
2003 | else | |
2004 | result = value_primitive_field (value, 0, type_index, type); | |
2005 | } | |
2006 | if (e.reason < 0) | |
2007 | { | |
2008 | return NULL; | |
2009 | } | |
2010 | else | |
2011 | { | |
2012 | return result; | |
2013 | } | |
2014 | } | |
2015 | ||
2016 | /* Obtain the information about child INDEX of the variable | |
2017 | object PARENT. | |
2018 | If CNAME is not null, sets *CNAME to the name of the child relative | |
2019 | to the parent. | |
2020 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
2021 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
2022 | ||
2023 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
2024 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
2025 | to NULL. */ | |
2026 | static void | |
2027 | c_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2028 | char **cname, struct value **cvalue, struct type **ctype, |
2029 | char **cfull_expression) | |
bbec2603 VP |
2030 | { |
2031 | struct value *value = parent->value; | |
2024f65a | 2032 | struct type *type = get_value_type (parent); |
02142340 VP |
2033 | char *parent_expression = NULL; |
2034 | int was_ptr; | |
bbec2603 VP |
2035 | |
2036 | if (cname) | |
2037 | *cname = NULL; | |
2038 | if (cvalue) | |
2039 | *cvalue = NULL; | |
2040 | if (ctype) | |
2041 | *ctype = NULL; | |
02142340 VP |
2042 | if (cfull_expression) |
2043 | { | |
2044 | *cfull_expression = NULL; | |
2045 | parent_expression = varobj_get_path_expr (parent); | |
2046 | } | |
2047 | adjust_value_for_child_access (&value, &type, &was_ptr); | |
bbec2603 | 2048 | |
8b93c638 JM |
2049 | switch (TYPE_CODE (type)) |
2050 | { | |
2051 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
2052 | if (cname) |
2053 | *cname = xstrprintf ("%d", index | |
2054 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2055 | ||
2056 | if (cvalue && value) | |
2057 | { | |
2058 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
2059 | struct value *indval = | |
2060 | value_from_longest (builtin_type_int, (LONGEST) real_index); | |
2061 | gdb_value_subscript (value, indval, cvalue); | |
2062 | } | |
2063 | ||
2064 | if (ctype) | |
2065 | *ctype = get_target_type (type); | |
2066 | ||
02142340 VP |
2067 | if (cfull_expression) |
2068 | *cfull_expression = xstrprintf ("(%s)[%d]", parent_expression, | |
2069 | index | |
2070 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2071 | ||
2072 | ||
8b93c638 JM |
2073 | break; |
2074 | ||
2075 | case TYPE_CODE_STRUCT: | |
2076 | case TYPE_CODE_UNION: | |
bbec2603 VP |
2077 | if (cname) |
2078 | { | |
2079 | char *string = TYPE_FIELD_NAME (type, index); | |
2080 | *cname = savestring (string, strlen (string)); | |
2081 | } | |
2082 | ||
2083 | if (cvalue && value) | |
2084 | { | |
2085 | /* For C, varobj index is the same as type index. */ | |
2086 | *cvalue = value_struct_element_index (value, index); | |
2087 | } | |
2088 | ||
2089 | if (ctype) | |
2090 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2091 | ||
02142340 VP |
2092 | if (cfull_expression) |
2093 | { | |
2094 | char *join = was_ptr ? "->" : "."; | |
2095 | *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, join, | |
2096 | TYPE_FIELD_NAME (type, index)); | |
2097 | } | |
2098 | ||
8b93c638 JM |
2099 | break; |
2100 | ||
2101 | case TYPE_CODE_PTR: | |
bbec2603 VP |
2102 | if (cname) |
2103 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 2104 | |
bbec2603 | 2105 | if (cvalue && value) |
3f4178d6 DJ |
2106 | { |
2107 | int success = gdb_value_ind (value, cvalue); | |
2108 | if (!success) | |
2109 | *cvalue = NULL; | |
2110 | } | |
bbec2603 | 2111 | |
2024f65a VP |
2112 | /* Don't use get_target_type because it calls |
2113 | check_typedef and here, we want to show the true | |
2114 | declared type of the variable. */ | |
bbec2603 | 2115 | if (ctype) |
2024f65a | 2116 | *ctype = TYPE_TARGET_TYPE (type); |
02142340 VP |
2117 | |
2118 | if (cfull_expression) | |
2119 | *cfull_expression = xstrprintf ("*(%s)", parent_expression); | |
bbec2603 | 2120 | |
8b93c638 JM |
2121 | break; |
2122 | ||
2123 | default: | |
2124 | /* This should not happen */ | |
bbec2603 VP |
2125 | if (cname) |
2126 | *cname = xstrdup ("???"); | |
02142340 VP |
2127 | if (cfull_expression) |
2128 | *cfull_expression = xstrdup ("???"); | |
bbec2603 | 2129 | /* Don't set value and type, we don't know then. */ |
8b93c638 | 2130 | } |
bbec2603 | 2131 | } |
8b93c638 | 2132 | |
bbec2603 VP |
2133 | static char * |
2134 | c_name_of_child (struct varobj *parent, int index) | |
2135 | { | |
2136 | char *name; | |
02142340 | 2137 | c_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2138 | return name; |
2139 | } | |
2140 | ||
02142340 VP |
2141 | static char * |
2142 | c_path_expr_of_child (struct varobj *child) | |
2143 | { | |
2144 | c_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2145 | &child->path_expr); | |
2146 | return child->path_expr; | |
2147 | } | |
2148 | ||
30b28db1 | 2149 | static struct value * |
fba45db2 | 2150 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 2151 | { |
5e572bb4 | 2152 | struct value *new_val = NULL; |
73a93a32 | 2153 | struct varobj *var = *var_handle; |
8b93c638 JM |
2154 | struct frame_info *fi; |
2155 | int within_scope; | |
2156 | ||
73a93a32 | 2157 | /* Only root variables can be updated... */ |
b2c2bd75 | 2158 | if (!is_root_p (var)) |
73a93a32 JI |
2159 | /* Not a root var */ |
2160 | return NULL; | |
2161 | ||
72330bd6 | 2162 | |
8b93c638 | 2163 | /* Determine whether the variable is still around. */ |
b20d8971 | 2164 | if (var->root->valid_block == NULL || var->root->use_selected_frame) |
8b93c638 JM |
2165 | within_scope = 1; |
2166 | else | |
2167 | { | |
e64d9b3d | 2168 | fi = frame_find_by_id (var->root->frame); |
8b93c638 JM |
2169 | within_scope = fi != NULL; |
2170 | /* FIXME: select_frame could fail */ | |
d2353924 NR |
2171 | if (fi) |
2172 | { | |
2173 | CORE_ADDR pc = get_frame_pc (fi); | |
2174 | if (pc < BLOCK_START (var->root->valid_block) || | |
2175 | pc >= BLOCK_END (var->root->valid_block)) | |
2176 | within_scope = 0; | |
2d43bda2 NR |
2177 | else |
2178 | select_frame (fi); | |
d2353924 | 2179 | } |
8b93c638 | 2180 | } |
72330bd6 | 2181 | |
8b93c638 JM |
2182 | if (within_scope) |
2183 | { | |
73a93a32 | 2184 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
2185 | expression fails we want to just return NULL. */ |
2186 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
2187 | return new_val; |
2188 | } | |
2189 | ||
2190 | return NULL; | |
2191 | } | |
2192 | ||
30b28db1 | 2193 | static struct value * |
fba45db2 | 2194 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2195 | { |
bbec2603 | 2196 | struct value *value = NULL; |
02142340 | 2197 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2198 | |
2199 | return value; | |
2200 | } | |
2201 | ||
2202 | static struct type * | |
fba45db2 | 2203 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2204 | { |
bbec2603 | 2205 | struct type *type = NULL; |
02142340 | 2206 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2207 | return type; |
2208 | } | |
2209 | ||
8b93c638 | 2210 | static char * |
fba45db2 | 2211 | c_value_of_variable (struct varobj *var) |
8b93c638 | 2212 | { |
14b3d9c9 JB |
2213 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2214 | it will print out its children instead of "{...}". So we need to | |
2215 | catch that case explicitly. */ | |
2216 | struct type *type = get_type (var); | |
e64d9b3d | 2217 | |
14b3d9c9 JB |
2218 | /* Strip top-level references. */ |
2219 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2220 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2221 | ||
2222 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2223 | { |
2224 | case TYPE_CODE_STRUCT: | |
2225 | case TYPE_CODE_UNION: | |
2226 | return xstrdup ("{...}"); | |
2227 | /* break; */ | |
2228 | ||
2229 | case TYPE_CODE_ARRAY: | |
2230 | { | |
e64d9b3d | 2231 | char *number; |
b435e160 | 2232 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2233 | return (number); |
8b93c638 JM |
2234 | } |
2235 | /* break; */ | |
2236 | ||
2237 | default: | |
2238 | { | |
575bbeb6 KS |
2239 | if (var->value == NULL) |
2240 | { | |
2241 | /* This can happen if we attempt to get the value of a struct | |
2242 | member when the parent is an invalid pointer. This is an | |
2243 | error condition, so we should tell the caller. */ | |
2244 | return NULL; | |
2245 | } | |
2246 | else | |
2247 | { | |
25d5ea92 VP |
2248 | if (var->not_fetched && value_lazy (var->value)) |
2249 | /* Frozen variable and no value yet. We don't | |
2250 | implicitly fetch the value. MI response will | |
2251 | use empty string for the value, which is OK. */ | |
2252 | return NULL; | |
2253 | ||
b2c2bd75 | 2254 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2255 | gdb_assert (!value_lazy (var->value)); |
c39c8256 | 2256 | return xstrdup (var->print_value); |
85265413 | 2257 | } |
e64d9b3d | 2258 | } |
8b93c638 JM |
2259 | } |
2260 | } | |
2261 | \f | |
2262 | ||
2263 | /* C++ */ | |
2264 | ||
2265 | static int | |
fba45db2 | 2266 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2267 | { |
2268 | struct type *type; | |
2269 | int children, dont_know; | |
2270 | ||
2271 | dont_know = 1; | |
2272 | children = 0; | |
2273 | ||
2274 | if (!CPLUS_FAKE_CHILD (var)) | |
2275 | { | |
2024f65a | 2276 | type = get_value_type (var); |
02142340 | 2277 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2278 | |
2279 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2280 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2281 | { |
2282 | int kids[3]; | |
2283 | ||
2284 | cplus_class_num_children (type, kids); | |
2285 | if (kids[v_public] != 0) | |
2286 | children++; | |
2287 | if (kids[v_private] != 0) | |
2288 | children++; | |
2289 | if (kids[v_protected] != 0) | |
2290 | children++; | |
2291 | ||
2292 | /* Add any baseclasses */ | |
2293 | children += TYPE_N_BASECLASSES (type); | |
2294 | dont_know = 0; | |
2295 | ||
2296 | /* FIXME: save children in var */ | |
2297 | } | |
2298 | } | |
2299 | else | |
2300 | { | |
2301 | int kids[3]; | |
2302 | ||
2024f65a | 2303 | type = get_value_type (var->parent); |
02142340 | 2304 | adjust_value_for_child_access (NULL, &type, NULL); |
8b93c638 JM |
2305 | |
2306 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2307 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2308 | children = kids[v_public]; |
6e382aa3 | 2309 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2310 | children = kids[v_private]; |
2311 | else | |
2312 | children = kids[v_protected]; | |
2313 | dont_know = 0; | |
2314 | } | |
2315 | ||
2316 | if (dont_know) | |
2317 | children = c_number_of_children (var); | |
2318 | ||
2319 | return children; | |
2320 | } | |
2321 | ||
2322 | /* Compute # of public, private, and protected variables in this class. | |
2323 | That means we need to descend into all baseclasses and find out | |
2324 | how many are there, too. */ | |
2325 | static void | |
1669605f | 2326 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2327 | { |
2328 | int i; | |
2329 | ||
2330 | children[v_public] = 0; | |
2331 | children[v_private] = 0; | |
2332 | children[v_protected] = 0; | |
2333 | ||
2334 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2335 | { | |
2336 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2337 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2338 | continue; |
2339 | ||
2340 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2341 | children[v_protected]++; | |
2342 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2343 | children[v_private]++; | |
2344 | else | |
2345 | children[v_public]++; | |
2346 | } | |
2347 | } | |
2348 | ||
2349 | static char * | |
fba45db2 | 2350 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2351 | { |
2352 | return c_name_of_variable (parent); | |
2353 | } | |
2354 | ||
2024f65a VP |
2355 | enum accessibility { private_field, protected_field, public_field }; |
2356 | ||
2357 | /* Check if field INDEX of TYPE has the specified accessibility. | |
2358 | Return 0 if so and 1 otherwise. */ | |
2359 | static int | |
2360 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 2361 | { |
2024f65a VP |
2362 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
2363 | return 1; | |
2364 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
2365 | return 1; | |
2366 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
2367 | && !TYPE_FIELD_PROTECTED (type, index)) | |
2368 | return 1; | |
2369 | else | |
2370 | return 0; | |
2371 | } | |
2372 | ||
2373 | static void | |
2374 | cplus_describe_child (struct varobj *parent, int index, | |
02142340 VP |
2375 | char **cname, struct value **cvalue, struct type **ctype, |
2376 | char **cfull_expression) | |
2024f65a | 2377 | { |
348144ba | 2378 | char *name = NULL; |
2024f65a | 2379 | struct value *value; |
8b93c638 | 2380 | struct type *type; |
02142340 VP |
2381 | int was_ptr; |
2382 | char *parent_expression = NULL; | |
8b93c638 | 2383 | |
2024f65a VP |
2384 | if (cname) |
2385 | *cname = NULL; | |
2386 | if (cvalue) | |
2387 | *cvalue = NULL; | |
2388 | if (ctype) | |
2389 | *ctype = NULL; | |
02142340 VP |
2390 | if (cfull_expression) |
2391 | *cfull_expression = NULL; | |
2024f65a | 2392 | |
8b93c638 JM |
2393 | if (CPLUS_FAKE_CHILD (parent)) |
2394 | { | |
2024f65a VP |
2395 | value = parent->parent->value; |
2396 | type = get_value_type (parent->parent); | |
02142340 VP |
2397 | if (cfull_expression) |
2398 | parent_expression = varobj_get_path_expr (parent->parent); | |
8b93c638 JM |
2399 | } |
2400 | else | |
2024f65a VP |
2401 | { |
2402 | value = parent->value; | |
2403 | type = get_value_type (parent); | |
02142340 VP |
2404 | if (cfull_expression) |
2405 | parent_expression = varobj_get_path_expr (parent); | |
2024f65a | 2406 | } |
8b93c638 | 2407 | |
02142340 | 2408 | adjust_value_for_child_access (&value, &type, &was_ptr); |
2024f65a VP |
2409 | |
2410 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
3f4178d6 | 2411 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
8b93c638 | 2412 | { |
02142340 | 2413 | char *join = was_ptr ? "->" : "."; |
8b93c638 JM |
2414 | if (CPLUS_FAKE_CHILD (parent)) |
2415 | { | |
6e382aa3 JJ |
2416 | /* The fields of the class type are ordered as they |
2417 | appear in the class. We are given an index for a | |
2418 | particular access control type ("public","protected", | |
2419 | or "private"). We must skip over fields that don't | |
2420 | have the access control we are looking for to properly | |
2421 | find the indexed field. */ | |
2422 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 2423 | enum accessibility acc = public_field; |
6e382aa3 | 2424 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 2425 | acc = private_field; |
6e382aa3 | 2426 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
2427 | acc = protected_field; |
2428 | ||
2429 | while (index >= 0) | |
6e382aa3 | 2430 | { |
2024f65a VP |
2431 | if (TYPE_VPTR_BASETYPE (type) == type |
2432 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2433 | ; /* ignore vptr */ | |
2434 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
2435 | --index; |
2436 | ++type_index; | |
6e382aa3 | 2437 | } |
2024f65a VP |
2438 | --type_index; |
2439 | ||
2440 | if (cname) | |
2441 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
2442 | ||
2443 | if (cvalue && value) | |
2444 | *cvalue = value_struct_element_index (value, type_index); | |
2445 | ||
2446 | if (ctype) | |
2447 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
02142340 VP |
2448 | |
2449 | if (cfull_expression) | |
2450 | *cfull_expression = xstrprintf ("((%s)%s%s)", parent_expression, | |
2451 | join, | |
2452 | TYPE_FIELD_NAME (type, type_index)); | |
2024f65a VP |
2453 | } |
2454 | else if (index < TYPE_N_BASECLASSES (type)) | |
2455 | { | |
2456 | /* This is a baseclass. */ | |
2457 | if (cname) | |
2458 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
2459 | ||
2460 | if (cvalue && value) | |
6e382aa3 | 2461 | { |
2024f65a | 2462 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
02142340 | 2463 | release_value (*cvalue); |
6e382aa3 JJ |
2464 | } |
2465 | ||
2024f65a VP |
2466 | if (ctype) |
2467 | { | |
2468 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2469 | } | |
02142340 VP |
2470 | |
2471 | if (cfull_expression) | |
2472 | { | |
2473 | char *ptr = was_ptr ? "*" : ""; | |
2474 | /* Cast the parent to the base' type. Note that in gdb, | |
2475 | expression like | |
2476 | (Base1)d | |
2477 | will create an lvalue, for all appearences, so we don't | |
2478 | need to use more fancy: | |
2479 | *(Base1*)(&d) | |
2480 | construct. */ | |
2481 | *cfull_expression = xstrprintf ("(%s(%s%s) %s)", | |
2482 | ptr, | |
2483 | TYPE_FIELD_NAME (type, index), | |
2484 | ptr, | |
2485 | parent_expression); | |
2486 | } | |
8b93c638 | 2487 | } |
8b93c638 JM |
2488 | else |
2489 | { | |
348144ba | 2490 | char *access = NULL; |
6e382aa3 | 2491 | int children[3]; |
2024f65a | 2492 | cplus_class_num_children (type, children); |
6e382aa3 | 2493 | |
8b93c638 | 2494 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2495 | only be "public", "private", or "protected" |
2496 | ||
2497 | The special "fake" children are always output by varobj in | |
2498 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2499 | index -= TYPE_N_BASECLASSES (type); |
2500 | switch (index) | |
2501 | { | |
2502 | case 0: | |
6e382aa3 | 2503 | if (children[v_public] > 0) |
2024f65a | 2504 | access = "public"; |
6e382aa3 | 2505 | else if (children[v_private] > 0) |
2024f65a | 2506 | access = "private"; |
6e382aa3 | 2507 | else |
2024f65a | 2508 | access = "protected"; |
6e382aa3 | 2509 | break; |
8b93c638 | 2510 | case 1: |
6e382aa3 | 2511 | if (children[v_public] > 0) |
8b93c638 | 2512 | { |
6e382aa3 | 2513 | if (children[v_private] > 0) |
2024f65a | 2514 | access = "private"; |
6e382aa3 | 2515 | else |
2024f65a | 2516 | access = "protected"; |
8b93c638 | 2517 | } |
6e382aa3 | 2518 | else if (children[v_private] > 0) |
2024f65a | 2519 | access = "protected"; |
6e382aa3 | 2520 | break; |
8b93c638 | 2521 | case 2: |
6e382aa3 | 2522 | /* Must be protected */ |
2024f65a | 2523 | access = "protected"; |
6e382aa3 | 2524 | break; |
8b93c638 JM |
2525 | default: |
2526 | /* error! */ | |
2527 | break; | |
2528 | } | |
348144ba MS |
2529 | |
2530 | gdb_assert (access); | |
2024f65a VP |
2531 | if (cname) |
2532 | *cname = xstrdup (access); | |
8b93c638 | 2533 | |
02142340 | 2534 | /* Value and type and full expression are null here. */ |
2024f65a | 2535 | } |
8b93c638 | 2536 | } |
8b93c638 JM |
2537 | else |
2538 | { | |
02142340 | 2539 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
2024f65a VP |
2540 | } |
2541 | } | |
8b93c638 | 2542 | |
2024f65a VP |
2543 | static char * |
2544 | cplus_name_of_child (struct varobj *parent, int index) | |
2545 | { | |
2546 | char *name = NULL; | |
02142340 | 2547 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
8b93c638 JM |
2548 | return name; |
2549 | } | |
2550 | ||
02142340 VP |
2551 | static char * |
2552 | cplus_path_expr_of_child (struct varobj *child) | |
2553 | { | |
2554 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, | |
2555 | &child->path_expr); | |
2556 | return child->path_expr; | |
2557 | } | |
2558 | ||
30b28db1 | 2559 | static struct value * |
fba45db2 | 2560 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2561 | { |
73a93a32 | 2562 | return c_value_of_root (var_handle); |
8b93c638 JM |
2563 | } |
2564 | ||
30b28db1 | 2565 | static struct value * |
fba45db2 | 2566 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2567 | { |
2024f65a | 2568 | struct value *value = NULL; |
02142340 | 2569 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
8b93c638 JM |
2570 | return value; |
2571 | } | |
2572 | ||
2573 | static struct type * | |
fba45db2 | 2574 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2575 | { |
2024f65a | 2576 | struct type *type = NULL; |
02142340 | 2577 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
8b93c638 JM |
2578 | return type; |
2579 | } | |
2580 | ||
8b93c638 | 2581 | static char * |
fba45db2 | 2582 | cplus_value_of_variable (struct varobj *var) |
8b93c638 JM |
2583 | { |
2584 | ||
2585 | /* If we have one of our special types, don't print out | |
2586 | any value. */ | |
2587 | if (CPLUS_FAKE_CHILD (var)) | |
2588 | return xstrdup (""); | |
2589 | ||
2590 | return c_value_of_variable (var); | |
2591 | } | |
2592 | \f | |
2593 | /* Java */ | |
2594 | ||
2595 | static int | |
fba45db2 | 2596 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2597 | { |
2598 | return cplus_number_of_children (var); | |
2599 | } | |
2600 | ||
2601 | static char * | |
fba45db2 | 2602 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2603 | { |
2604 | char *p, *name; | |
2605 | ||
2606 | name = cplus_name_of_variable (parent); | |
2607 | /* If the name has "-" in it, it is because we | |
2608 | needed to escape periods in the name... */ | |
2609 | p = name; | |
2610 | ||
2611 | while (*p != '\000') | |
2612 | { | |
2613 | if (*p == '-') | |
2614 | *p = '.'; | |
2615 | p++; | |
2616 | } | |
2617 | ||
2618 | return name; | |
2619 | } | |
2620 | ||
2621 | static char * | |
fba45db2 | 2622 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2623 | { |
2624 | char *name, *p; | |
2625 | ||
2626 | name = cplus_name_of_child (parent, index); | |
2627 | /* Escape any periods in the name... */ | |
2628 | p = name; | |
2629 | ||
2630 | while (*p != '\000') | |
2631 | { | |
2632 | if (*p == '.') | |
2633 | *p = '-'; | |
2634 | p++; | |
2635 | } | |
2636 | ||
2637 | return name; | |
2638 | } | |
2639 | ||
02142340 VP |
2640 | static char * |
2641 | java_path_expr_of_child (struct varobj *child) | |
2642 | { | |
2643 | return NULL; | |
2644 | } | |
2645 | ||
30b28db1 | 2646 | static struct value * |
fba45db2 | 2647 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2648 | { |
73a93a32 | 2649 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2650 | } |
2651 | ||
30b28db1 | 2652 | static struct value * |
fba45db2 | 2653 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2654 | { |
2655 | return cplus_value_of_child (parent, index); | |
2656 | } | |
2657 | ||
2658 | static struct type * | |
fba45db2 | 2659 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2660 | { |
2661 | return cplus_type_of_child (parent, index); | |
2662 | } | |
2663 | ||
8b93c638 | 2664 | static char * |
fba45db2 | 2665 | java_value_of_variable (struct varobj *var) |
8b93c638 JM |
2666 | { |
2667 | return cplus_value_of_variable (var); | |
2668 | } | |
2669 | \f | |
2670 | extern void _initialize_varobj (void); | |
2671 | void | |
2672 | _initialize_varobj (void) | |
2673 | { | |
2674 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2675 | ||
2676 | varobj_table = xmalloc (sizeof_table); | |
2677 | memset (varobj_table, 0, sizeof_table); | |
2678 | ||
85c07804 AC |
2679 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2680 | &varobjdebug, _("\ | |
2681 | Set varobj debugging."), _("\ | |
2682 | Show varobj debugging."), _("\ | |
2683 | When non-zero, varobj debugging is enabled."), | |
2684 | NULL, | |
920d2a44 | 2685 | show_varobjdebug, |
85c07804 | 2686 | &setlist, &showlist); |
8b93c638 | 2687 | } |
8756216b DP |
2688 | |
2689 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2690 | are defined on globals. | |
2691 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2692 | void | |
2693 | varobj_invalidate (void) | |
2694 | { | |
2695 | struct varobj **all_rootvarobj; | |
2696 | struct varobj **varp; | |
2697 | ||
2698 | if (varobj_list (&all_rootvarobj) > 0) | |
2699 | { | |
2700 | varp = all_rootvarobj; | |
2701 | while (*varp != NULL) | |
2702 | { | |
2703 | /* global var must be re-evaluated. */ | |
2704 | if ((*varp)->root->valid_block == NULL) | |
2705 | { | |
2706 | struct varobj *tmp_var; | |
2707 | ||
2708 | /* Try to create a varobj with same expression. If we succeed replace | |
2709 | the old varobj, otherwise invalidate it. */ | |
2710 | tmp_var = varobj_create (NULL, (*varp)->name, (CORE_ADDR) 0, USE_CURRENT_FRAME); | |
2711 | if (tmp_var != NULL) | |
2712 | { | |
2713 | tmp_var->obj_name = xstrdup ((*varp)->obj_name); | |
2714 | varobj_delete (*varp, NULL, 0); | |
2715 | install_variable (tmp_var); | |
2716 | } | |
2717 | else | |
2718 | (*varp)->root->is_valid = 0; | |
2719 | } | |
2720 | else /* locals must be invalidated. */ | |
2721 | (*varp)->root->is_valid = 0; | |
2722 | ||
2723 | varp++; | |
2724 | } | |
2725 | xfree (all_rootvarobj); | |
2726 | } | |
2727 | return; | |
2728 | } |