Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
6aba47ca | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
1ecb4ee0 | 4 | Free Software Foundation, Inc. |
8b93c638 JM |
5 | |
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 8 | the Free Software Foundation; either version 3 of the License, or |
8b93c638 JM |
9 | (at your option) any later version. |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8b93c638 JM |
18 | |
19 | #include "defs.h" | |
a6c442d8 | 20 | #include "exceptions.h" |
8b93c638 JM |
21 | #include "value.h" |
22 | #include "expression.h" | |
23 | #include "frame.h" | |
8b93c638 JM |
24 | #include "language.h" |
25 | #include "wrapper.h" | |
26 | #include "gdbcmd.h" | |
d2353924 | 27 | #include "block.h" |
a6c442d8 MK |
28 | |
29 | #include "gdb_assert.h" | |
b66d6d2e | 30 | #include "gdb_string.h" |
8b93c638 JM |
31 | |
32 | #include "varobj.h" | |
28335dcc | 33 | #include "vec.h" |
8b93c638 JM |
34 | |
35 | /* Non-zero if we want to see trace of varobj level stuff. */ | |
36 | ||
37 | int varobjdebug = 0; | |
920d2a44 AC |
38 | static void |
39 | show_varobjdebug (struct ui_file *file, int from_tty, | |
40 | struct cmd_list_element *c, const char *value) | |
41 | { | |
42 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
43 | } | |
8b93c638 JM |
44 | |
45 | /* String representations of gdb's format codes */ | |
46 | char *varobj_format_string[] = | |
72330bd6 | 47 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
48 | |
49 | /* String representations of gdb's known languages */ | |
72330bd6 | 50 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
51 | |
52 | /* Data structures */ | |
53 | ||
54 | /* Every root variable has one of these structures saved in its | |
55 | varobj. Members which must be free'd are noted. */ | |
56 | struct varobj_root | |
72330bd6 | 57 | { |
8b93c638 | 58 | |
72330bd6 AC |
59 | /* Alloc'd expression for this parent. */ |
60 | struct expression *exp; | |
8b93c638 | 61 | |
72330bd6 AC |
62 | /* Block for which this expression is valid */ |
63 | struct block *valid_block; | |
8b93c638 | 64 | |
72330bd6 | 65 | /* The frame for this expression */ |
e64d9b3d | 66 | struct frame_id frame; |
8b93c638 | 67 | |
72330bd6 AC |
68 | /* If 1, "update" always recomputes the frame & valid block |
69 | using the currently selected frame. */ | |
70 | int use_selected_frame; | |
73a93a32 | 71 | |
8756216b DP |
72 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
73 | to symbols that do not exist anymore. */ | |
74 | int is_valid; | |
75 | ||
72330bd6 AC |
76 | /* Language info for this variable and its children */ |
77 | struct language_specific *lang; | |
8b93c638 | 78 | |
72330bd6 AC |
79 | /* The varobj for this root node. */ |
80 | struct varobj *rootvar; | |
8b93c638 | 81 | |
72330bd6 AC |
82 | /* Next root variable */ |
83 | struct varobj_root *next; | |
84 | }; | |
8b93c638 | 85 | |
28335dcc VP |
86 | typedef struct varobj *varobj_p; |
87 | ||
88 | DEF_VEC_P (varobj_p); | |
89 | ||
8b93c638 JM |
90 | /* Every variable in the system has a structure of this type defined |
91 | for it. This structure holds all information necessary to manipulate | |
92 | a particular object variable. Members which must be freed are noted. */ | |
93 | struct varobj | |
72330bd6 | 94 | { |
8b93c638 | 95 | |
72330bd6 AC |
96 | /* Alloc'd name of the variable for this object.. If this variable is a |
97 | child, then this name will be the child's source name. | |
98 | (bar, not foo.bar) */ | |
99 | /* NOTE: This is the "expression" */ | |
100 | char *name; | |
8b93c638 | 101 | |
72330bd6 AC |
102 | /* The alloc'd name for this variable's object. This is here for |
103 | convenience when constructing this object's children. */ | |
104 | char *obj_name; | |
8b93c638 | 105 | |
72330bd6 AC |
106 | /* Index of this variable in its parent or -1 */ |
107 | int index; | |
8b93c638 | 108 | |
72330bd6 AC |
109 | /* The type of this variable. This may NEVER be NULL. */ |
110 | struct type *type; | |
8b93c638 | 111 | |
b20d8971 VP |
112 | /* The value of this expression or subexpression. A NULL value |
113 | indicates there was an error getting this value. | |
b2c2bd75 VP |
114 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
115 | the value is either NULL, or not lazy. */ | |
30b28db1 | 116 | struct value *value; |
8b93c638 | 117 | |
72330bd6 AC |
118 | /* The number of (immediate) children this variable has */ |
119 | int num_children; | |
8b93c638 | 120 | |
72330bd6 AC |
121 | /* If this object is a child, this points to its immediate parent. */ |
122 | struct varobj *parent; | |
8b93c638 | 123 | |
28335dcc VP |
124 | /* Children of this object. */ |
125 | VEC (varobj_p) *children; | |
8b93c638 | 126 | |
72330bd6 AC |
127 | /* Description of the root variable. Points to root variable for children. */ |
128 | struct varobj_root *root; | |
8b93c638 | 129 | |
72330bd6 AC |
130 | /* The format of the output for this object */ |
131 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
132 | |
133 | /* Was this variable updated via a varobj_set_value operation */ | |
134 | int updated; | |
85265413 NR |
135 | |
136 | /* Last print value. */ | |
137 | char *print_value; | |
25d5ea92 VP |
138 | |
139 | /* Is this variable frozen. Frozen variables are never implicitly | |
140 | updated by -var-update * | |
141 | or -var-update <direct-or-indirect-parent>. */ | |
142 | int frozen; | |
143 | ||
144 | /* Is the value of this variable intentionally not fetched? It is | |
145 | not fetched if either the variable is frozen, or any parents is | |
146 | frozen. */ | |
147 | int not_fetched; | |
72330bd6 | 148 | }; |
8b93c638 | 149 | |
8b93c638 | 150 | struct cpstack |
72330bd6 AC |
151 | { |
152 | char *name; | |
153 | struct cpstack *next; | |
154 | }; | |
8b93c638 JM |
155 | |
156 | /* A list of varobjs */ | |
157 | ||
158 | struct vlist | |
72330bd6 AC |
159 | { |
160 | struct varobj *var; | |
161 | struct vlist *next; | |
162 | }; | |
8b93c638 JM |
163 | |
164 | /* Private function prototypes */ | |
165 | ||
166 | /* Helper functions for the above subcommands. */ | |
167 | ||
a14ed312 | 168 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 169 | |
a14ed312 KB |
170 | static void delete_variable_1 (struct cpstack **, int *, |
171 | struct varobj *, int, int); | |
8b93c638 | 172 | |
a14ed312 | 173 | static int install_variable (struct varobj *); |
8b93c638 | 174 | |
a14ed312 | 175 | static void uninstall_variable (struct varobj *); |
8b93c638 | 176 | |
a14ed312 | 177 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 178 | |
8b93c638 JM |
179 | /* Utility routines */ |
180 | ||
a14ed312 | 181 | static struct varobj *new_variable (void); |
8b93c638 | 182 | |
a14ed312 | 183 | static struct varobj *new_root_variable (void); |
8b93c638 | 184 | |
a14ed312 | 185 | static void free_variable (struct varobj *var); |
8b93c638 | 186 | |
74b7792f AC |
187 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
188 | ||
a14ed312 | 189 | static struct type *get_type (struct varobj *var); |
8b93c638 | 190 | |
6e2a9270 VP |
191 | static struct type *get_value_type (struct varobj *var); |
192 | ||
a14ed312 | 193 | static struct type *get_target_type (struct type *); |
8b93c638 | 194 | |
a14ed312 | 195 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 196 | |
a14ed312 | 197 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 198 | |
a14ed312 | 199 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 200 | |
acd65feb VP |
201 | static int install_new_value (struct varobj *var, struct value *value, |
202 | int initial); | |
203 | ||
8b93c638 JM |
204 | /* Language-specific routines. */ |
205 | ||
a14ed312 | 206 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 207 | |
a14ed312 | 208 | static int number_of_children (struct varobj *); |
8b93c638 | 209 | |
a14ed312 | 210 | static char *name_of_variable (struct varobj *); |
8b93c638 | 211 | |
a14ed312 | 212 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 213 | |
30b28db1 | 214 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 215 | |
30b28db1 | 216 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 217 | |
a14ed312 | 218 | static int variable_editable (struct varobj *var); |
8b93c638 | 219 | |
a14ed312 | 220 | static char *my_value_of_variable (struct varobj *var); |
8b93c638 | 221 | |
85265413 NR |
222 | static char *value_get_print_value (struct value *value, |
223 | enum varobj_display_formats format); | |
224 | ||
b2c2bd75 VP |
225 | static int varobj_value_is_changeable_p (struct varobj *var); |
226 | ||
227 | static int is_root_p (struct varobj *var); | |
8b93c638 JM |
228 | |
229 | /* C implementation */ | |
230 | ||
a14ed312 | 231 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 232 | |
a14ed312 | 233 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 234 | |
a14ed312 | 235 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 236 | |
30b28db1 | 237 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 238 | |
30b28db1 | 239 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 240 | |
a14ed312 | 241 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 242 | |
a14ed312 | 243 | static int c_variable_editable (struct varobj *var); |
8b93c638 | 244 | |
a14ed312 | 245 | static char *c_value_of_variable (struct varobj *var); |
8b93c638 JM |
246 | |
247 | /* C++ implementation */ | |
248 | ||
a14ed312 | 249 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 250 | |
a14ed312 | 251 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 252 | |
a14ed312 | 253 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 254 | |
a14ed312 | 255 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 256 | |
30b28db1 | 257 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 258 | |
30b28db1 | 259 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 260 | |
a14ed312 | 261 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 262 | |
a14ed312 | 263 | static int cplus_variable_editable (struct varobj *var); |
8b93c638 | 264 | |
a14ed312 | 265 | static char *cplus_value_of_variable (struct varobj *var); |
8b93c638 JM |
266 | |
267 | /* Java implementation */ | |
268 | ||
a14ed312 | 269 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 270 | |
a14ed312 | 271 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 272 | |
a14ed312 | 273 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 274 | |
30b28db1 | 275 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 276 | |
30b28db1 | 277 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 278 | |
a14ed312 | 279 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 280 | |
a14ed312 | 281 | static int java_variable_editable (struct varobj *var); |
8b93c638 | 282 | |
a14ed312 | 283 | static char *java_value_of_variable (struct varobj *var); |
8b93c638 JM |
284 | |
285 | /* The language specific vector */ | |
286 | ||
287 | struct language_specific | |
72330bd6 | 288 | { |
8b93c638 | 289 | |
72330bd6 AC |
290 | /* The language of this variable */ |
291 | enum varobj_languages language; | |
8b93c638 | 292 | |
72330bd6 AC |
293 | /* The number of children of PARENT. */ |
294 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 295 | |
72330bd6 AC |
296 | /* The name (expression) of a root varobj. */ |
297 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 298 | |
72330bd6 AC |
299 | /* The name of the INDEX'th child of PARENT. */ |
300 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 301 | |
30b28db1 AC |
302 | /* The ``struct value *'' of the root variable ROOT. */ |
303 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 304 | |
30b28db1 AC |
305 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
306 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 307 | |
72330bd6 AC |
308 | /* The type of the INDEX'th child of PARENT. */ |
309 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 310 | |
72330bd6 AC |
311 | /* Is VAR editable? */ |
312 | int (*variable_editable) (struct varobj * var); | |
8b93c638 | 313 | |
72330bd6 AC |
314 | /* The current value of VAR. */ |
315 | char *(*value_of_variable) (struct varobj * var); | |
316 | }; | |
8b93c638 JM |
317 | |
318 | /* Array of known source language routines. */ | |
d5d6fca5 | 319 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
320 | /* Unknown (try treating as C */ |
321 | { | |
72330bd6 AC |
322 | vlang_unknown, |
323 | c_number_of_children, | |
324 | c_name_of_variable, | |
325 | c_name_of_child, | |
326 | c_value_of_root, | |
327 | c_value_of_child, | |
328 | c_type_of_child, | |
329 | c_variable_editable, | |
330 | c_value_of_variable} | |
8b93c638 JM |
331 | , |
332 | /* C */ | |
333 | { | |
72330bd6 AC |
334 | vlang_c, |
335 | c_number_of_children, | |
336 | c_name_of_variable, | |
337 | c_name_of_child, | |
338 | c_value_of_root, | |
339 | c_value_of_child, | |
340 | c_type_of_child, | |
341 | c_variable_editable, | |
342 | c_value_of_variable} | |
8b93c638 JM |
343 | , |
344 | /* C++ */ | |
345 | { | |
72330bd6 AC |
346 | vlang_cplus, |
347 | cplus_number_of_children, | |
348 | cplus_name_of_variable, | |
349 | cplus_name_of_child, | |
350 | cplus_value_of_root, | |
351 | cplus_value_of_child, | |
352 | cplus_type_of_child, | |
353 | cplus_variable_editable, | |
354 | cplus_value_of_variable} | |
8b93c638 JM |
355 | , |
356 | /* Java */ | |
357 | { | |
72330bd6 AC |
358 | vlang_java, |
359 | java_number_of_children, | |
360 | java_name_of_variable, | |
361 | java_name_of_child, | |
362 | java_value_of_root, | |
363 | java_value_of_child, | |
364 | java_type_of_child, | |
365 | java_variable_editable, | |
366 | java_value_of_variable} | |
8b93c638 JM |
367 | }; |
368 | ||
369 | /* A little convenience enum for dealing with C++/Java */ | |
370 | enum vsections | |
72330bd6 AC |
371 | { |
372 | v_public = 0, v_private, v_protected | |
373 | }; | |
8b93c638 JM |
374 | |
375 | /* Private data */ | |
376 | ||
377 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 378 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
379 | |
380 | /* Header of the list of root variable objects */ | |
381 | static struct varobj_root *rootlist; | |
382 | static int rootcount = 0; /* number of root varobjs in the list */ | |
383 | ||
384 | /* Prime number indicating the number of buckets in the hash table */ | |
385 | /* A prime large enough to avoid too many colisions */ | |
386 | #define VAROBJ_TABLE_SIZE 227 | |
387 | ||
388 | /* Pointer to the varobj hash table (built at run time) */ | |
389 | static struct vlist **varobj_table; | |
390 | ||
8b93c638 JM |
391 | /* Is the variable X one of our "fake" children? */ |
392 | #define CPLUS_FAKE_CHILD(x) \ | |
393 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
394 | \f | |
395 | ||
396 | /* API Implementation */ | |
b2c2bd75 VP |
397 | static int |
398 | is_root_p (struct varobj *var) | |
399 | { | |
400 | return (var->root->rootvar == var); | |
401 | } | |
8b93c638 JM |
402 | |
403 | /* Creates a varobj (not its children) */ | |
404 | ||
7d8547c9 AC |
405 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
406 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
407 | ||
408 | static struct frame_info * | |
409 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
410 | { | |
411 | struct frame_info *frame = NULL; | |
412 | ||
413 | if (frame_addr == (CORE_ADDR) 0) | |
414 | return NULL; | |
415 | ||
416 | while (1) | |
417 | { | |
418 | frame = get_prev_frame (frame); | |
419 | if (frame == NULL) | |
420 | return NULL; | |
eb5492fa | 421 | if (get_frame_base_address (frame) == frame_addr) |
7d8547c9 AC |
422 | return frame; |
423 | } | |
424 | } | |
425 | ||
8b93c638 JM |
426 | struct varobj * |
427 | varobj_create (char *objname, | |
72330bd6 | 428 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
429 | { |
430 | struct varobj *var; | |
2c67cb8b AC |
431 | struct frame_info *fi; |
432 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
433 | struct block *block; |
434 | struct cleanup *old_chain; | |
435 | ||
436 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
437 | var = new_root_variable (); | |
74b7792f | 438 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
439 | |
440 | if (expression != NULL) | |
441 | { | |
442 | char *p; | |
443 | enum varobj_languages lang; | |
e55dccf0 | 444 | struct value *value = NULL; |
8b93c638 JM |
445 | |
446 | /* Parse and evaluate the expression, filling in as much | |
447 | of the variable's data as possible */ | |
448 | ||
449 | /* Allow creator to specify context of variable */ | |
72330bd6 | 450 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
206415a3 | 451 | fi = deprecated_safe_get_selected_frame (); |
8b93c638 | 452 | else |
7d8547c9 AC |
453 | /* FIXME: cagney/2002-11-23: This code should be doing a |
454 | lookup using the frame ID and not just the frame's | |
455 | ``address''. This, of course, means an interface change. | |
456 | However, with out that interface change ISAs, such as the | |
457 | ia64 with its two stacks, won't work. Similar goes for the | |
458 | case where there is a frameless function. */ | |
8b93c638 JM |
459 | fi = find_frame_addr_in_frame_chain (frame); |
460 | ||
73a93a32 JI |
461 | /* frame = -2 means always use selected frame */ |
462 | if (type == USE_SELECTED_FRAME) | |
463 | var->root->use_selected_frame = 1; | |
464 | ||
8b93c638 JM |
465 | block = NULL; |
466 | if (fi != NULL) | |
ae767bfb | 467 | block = get_frame_block (fi, 0); |
8b93c638 JM |
468 | |
469 | p = expression; | |
470 | innermost_block = NULL; | |
73a93a32 JI |
471 | /* Wrap the call to parse expression, so we can |
472 | return a sensible error. */ | |
473 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
474 | { | |
475 | return NULL; | |
476 | } | |
8b93c638 JM |
477 | |
478 | /* Don't allow variables to be created for types. */ | |
479 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
480 | { | |
481 | do_cleanups (old_chain); | |
bc8332bb AC |
482 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
483 | " as an expression.\n"); | |
8b93c638 JM |
484 | return NULL; |
485 | } | |
486 | ||
487 | var->format = variable_default_display (var); | |
488 | var->root->valid_block = innermost_block; | |
489 | var->name = savestring (expression, strlen (expression)); | |
490 | ||
491 | /* When the frame is different from the current frame, | |
492 | we must select the appropriate frame before parsing | |
493 | the expression, otherwise the value will not be current. | |
494 | Since select_frame is so benign, just call it for all cases. */ | |
495 | if (fi != NULL) | |
496 | { | |
7a424e99 | 497 | var->root->frame = get_frame_id (fi); |
206415a3 | 498 | old_fi = get_selected_frame (NULL); |
0f7d239c | 499 | select_frame (fi); |
8b93c638 JM |
500 | } |
501 | ||
502 | /* We definitively need to catch errors here. | |
503 | If evaluate_expression succeeds we got the value we wanted. | |
504 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb | 505 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
e55dccf0 VP |
506 | { |
507 | /* Error getting the value. Try to at least get the | |
508 | right type. */ | |
509 | struct value *type_only_value = evaluate_type (var->root->exp); | |
510 | var->type = value_type (type_only_value); | |
511 | } | |
512 | else | |
513 | var->type = value_type (value); | |
acd65feb | 514 | |
acd65feb | 515 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
516 | |
517 | /* Set language info */ | |
518 | lang = variable_language (var); | |
d5d6fca5 | 519 | var->root->lang = &languages[lang]; |
8b93c638 JM |
520 | |
521 | /* Set ourselves as our root */ | |
522 | var->root->rootvar = var; | |
523 | ||
524 | /* Reset the selected frame */ | |
525 | if (fi != NULL) | |
0f7d239c | 526 | select_frame (old_fi); |
8b93c638 JM |
527 | } |
528 | ||
73a93a32 JI |
529 | /* If the variable object name is null, that means this |
530 | is a temporary variable, so don't install it. */ | |
531 | ||
532 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 JM |
533 | { |
534 | var->obj_name = savestring (objname, strlen (objname)); | |
535 | ||
536 | /* If a varobj name is duplicated, the install will fail so | |
537 | we must clenup */ | |
538 | if (!install_variable (var)) | |
539 | { | |
540 | do_cleanups (old_chain); | |
541 | return NULL; | |
542 | } | |
543 | } | |
544 | ||
545 | discard_cleanups (old_chain); | |
546 | return var; | |
547 | } | |
548 | ||
549 | /* Generates an unique name that can be used for a varobj */ | |
550 | ||
551 | char * | |
552 | varobj_gen_name (void) | |
553 | { | |
554 | static int id = 0; | |
e64d9b3d | 555 | char *obj_name; |
8b93c638 JM |
556 | |
557 | /* generate a name for this object */ | |
558 | id++; | |
b435e160 | 559 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 560 | |
e64d9b3d | 561 | return obj_name; |
8b93c638 JM |
562 | } |
563 | ||
564 | /* Given an "objname", returns the pointer to the corresponding varobj | |
565 | or NULL if not found */ | |
566 | ||
567 | struct varobj * | |
568 | varobj_get_handle (char *objname) | |
569 | { | |
570 | struct vlist *cv; | |
571 | const char *chp; | |
572 | unsigned int index = 0; | |
573 | unsigned int i = 1; | |
574 | ||
575 | for (chp = objname; *chp; chp++) | |
576 | { | |
577 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
578 | } | |
579 | ||
580 | cv = *(varobj_table + index); | |
581 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
582 | cv = cv->next; | |
583 | ||
584 | if (cv == NULL) | |
8a3fe4f8 | 585 | error (_("Variable object not found")); |
8b93c638 JM |
586 | |
587 | return cv->var; | |
588 | } | |
589 | ||
590 | /* Given the handle, return the name of the object */ | |
591 | ||
592 | char * | |
593 | varobj_get_objname (struct varobj *var) | |
594 | { | |
595 | return var->obj_name; | |
596 | } | |
597 | ||
598 | /* Given the handle, return the expression represented by the object */ | |
599 | ||
600 | char * | |
601 | varobj_get_expression (struct varobj *var) | |
602 | { | |
603 | return name_of_variable (var); | |
604 | } | |
605 | ||
606 | /* Deletes a varobj and all its children if only_children == 0, | |
607 | otherwise deletes only the children; returns a malloc'ed list of all the | |
608 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
609 | ||
610 | int | |
611 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
612 | { | |
613 | int delcount; | |
614 | int mycount; | |
615 | struct cpstack *result = NULL; | |
616 | char **cp; | |
617 | ||
618 | /* Initialize a stack for temporary results */ | |
619 | cppush (&result, NULL); | |
620 | ||
621 | if (only_children) | |
622 | /* Delete only the variable children */ | |
623 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
624 | else | |
625 | /* Delete the variable and all its children */ | |
626 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
627 | ||
628 | /* We may have been asked to return a list of what has been deleted */ | |
629 | if (dellist != NULL) | |
630 | { | |
631 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
632 | ||
633 | cp = *dellist; | |
634 | mycount = delcount; | |
635 | *cp = cppop (&result); | |
636 | while ((*cp != NULL) && (mycount > 0)) | |
637 | { | |
638 | mycount--; | |
639 | cp++; | |
640 | *cp = cppop (&result); | |
641 | } | |
642 | ||
643 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 644 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 645 | mycount); |
8b93c638 JM |
646 | } |
647 | ||
648 | return delcount; | |
649 | } | |
650 | ||
651 | /* Set/Get variable object display format */ | |
652 | ||
653 | enum varobj_display_formats | |
654 | varobj_set_display_format (struct varobj *var, | |
655 | enum varobj_display_formats format) | |
656 | { | |
657 | switch (format) | |
658 | { | |
659 | case FORMAT_NATURAL: | |
660 | case FORMAT_BINARY: | |
661 | case FORMAT_DECIMAL: | |
662 | case FORMAT_HEXADECIMAL: | |
663 | case FORMAT_OCTAL: | |
664 | var->format = format; | |
665 | break; | |
666 | ||
667 | default: | |
668 | var->format = variable_default_display (var); | |
669 | } | |
670 | ||
671 | return var->format; | |
672 | } | |
673 | ||
674 | enum varobj_display_formats | |
675 | varobj_get_display_format (struct varobj *var) | |
676 | { | |
677 | return var->format; | |
678 | } | |
679 | ||
25d5ea92 VP |
680 | void |
681 | varobj_set_frozen (struct varobj *var, int frozen) | |
682 | { | |
683 | /* When a variable is unfrozen, we don't fetch its value. | |
684 | The 'not_fetched' flag remains set, so next -var-update | |
685 | won't complain. | |
686 | ||
687 | We don't fetch the value, because for structures the client | |
688 | should do -var-update anyway. It would be bad to have different | |
689 | client-size logic for structure and other types. */ | |
690 | var->frozen = frozen; | |
691 | } | |
692 | ||
693 | int | |
694 | varobj_get_frozen (struct varobj *var) | |
695 | { | |
696 | return var->frozen; | |
697 | } | |
698 | ||
699 | ||
8b93c638 JM |
700 | int |
701 | varobj_get_num_children (struct varobj *var) | |
702 | { | |
703 | if (var->num_children == -1) | |
704 | var->num_children = number_of_children (var); | |
705 | ||
706 | return var->num_children; | |
707 | } | |
708 | ||
709 | /* Creates a list of the immediate children of a variable object; | |
710 | the return code is the number of such children or -1 on error */ | |
711 | ||
712 | int | |
713 | varobj_list_children (struct varobj *var, struct varobj ***childlist) | |
714 | { | |
715 | struct varobj *child; | |
716 | char *name; | |
717 | int i; | |
718 | ||
719 | /* sanity check: have we been passed a pointer? */ | |
720 | if (childlist == NULL) | |
721 | return -1; | |
722 | ||
723 | *childlist = NULL; | |
724 | ||
725 | if (var->num_children == -1) | |
726 | var->num_children = number_of_children (var); | |
727 | ||
74a44383 DJ |
728 | /* If that failed, give up. */ |
729 | if (var->num_children == -1) | |
730 | return -1; | |
731 | ||
28335dcc VP |
732 | /* If we're called when the list of children is not yet initialized, |
733 | allocate enough elements in it. */ | |
734 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
735 | VEC_safe_push (varobj_p, var->children, NULL); | |
736 | ||
8b93c638 JM |
737 | /* List of children */ |
738 | *childlist = xmalloc ((var->num_children + 1) * sizeof (struct varobj *)); | |
739 | ||
740 | for (i = 0; i < var->num_children; i++) | |
741 | { | |
28335dcc VP |
742 | varobj_p existing; |
743 | ||
8b93c638 JM |
744 | /* Mark as the end in case we bail out */ |
745 | *((*childlist) + i) = NULL; | |
746 | ||
28335dcc VP |
747 | existing = VEC_index (varobj_p, var->children, i); |
748 | ||
749 | if (existing == NULL) | |
750 | { | |
751 | /* Either it's the first call to varobj_list_children for | |
752 | this variable object, and the child was never created, | |
753 | or it was explicitly deleted by the client. */ | |
754 | name = name_of_child (var, i); | |
755 | existing = create_child (var, i, name); | |
756 | VEC_replace (varobj_p, var->children, i, existing); | |
757 | } | |
8b93c638 | 758 | |
28335dcc | 759 | *((*childlist) + i) = existing; |
8b93c638 JM |
760 | } |
761 | ||
762 | /* End of list is marked by a NULL pointer */ | |
763 | *((*childlist) + i) = NULL; | |
764 | ||
765 | return var->num_children; | |
766 | } | |
767 | ||
768 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
769 | prints on the console */ | |
770 | ||
771 | char * | |
772 | varobj_get_type (struct varobj *var) | |
773 | { | |
30b28db1 | 774 | struct value *val; |
8b93c638 JM |
775 | struct cleanup *old_chain; |
776 | struct ui_file *stb; | |
777 | char *thetype; | |
778 | long length; | |
779 | ||
780 | /* For the "fake" variables, do not return a type. (It's type is | |
8756216b DP |
781 | NULL, too.) |
782 | Do not return a type for invalid variables as well. */ | |
783 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
784 | return NULL; |
785 | ||
786 | stb = mem_fileopen (); | |
787 | old_chain = make_cleanup_ui_file_delete (stb); | |
788 | ||
30b28db1 | 789 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
790 | cast it to our type. We then typeprint this variable. */ |
791 | val = value_zero (var->type, not_lval); | |
df407dfe | 792 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
793 | |
794 | thetype = ui_file_xstrdup (stb, &length); | |
795 | do_cleanups (old_chain); | |
796 | return thetype; | |
797 | } | |
798 | ||
1ecb4ee0 DJ |
799 | /* Obtain the type of an object variable. */ |
800 | ||
801 | struct type * | |
802 | varobj_get_gdb_type (struct varobj *var) | |
803 | { | |
804 | return var->type; | |
805 | } | |
806 | ||
8b93c638 JM |
807 | enum varobj_languages |
808 | varobj_get_language (struct varobj *var) | |
809 | { | |
810 | return variable_language (var); | |
811 | } | |
812 | ||
813 | int | |
814 | varobj_get_attributes (struct varobj *var) | |
815 | { | |
816 | int attributes = 0; | |
817 | ||
8756216b | 818 | if (var->root->is_valid && variable_editable (var)) |
8b93c638 JM |
819 | /* FIXME: define masks for attributes */ |
820 | attributes |= 0x00000001; /* Editable */ | |
821 | ||
822 | return attributes; | |
823 | } | |
824 | ||
825 | char * | |
826 | varobj_get_value (struct varobj *var) | |
827 | { | |
828 | return my_value_of_variable (var); | |
829 | } | |
830 | ||
831 | /* Set the value of an object variable (if it is editable) to the | |
832 | value of the given expression */ | |
833 | /* Note: Invokes functions that can call error() */ | |
834 | ||
835 | int | |
836 | varobj_set_value (struct varobj *var, char *expression) | |
837 | { | |
30b28db1 | 838 | struct value *val; |
8b93c638 | 839 | int offset = 0; |
a6c442d8 | 840 | int error = 0; |
8b93c638 JM |
841 | |
842 | /* The argument "expression" contains the variable's new value. | |
843 | We need to first construct a legal expression for this -- ugh! */ | |
844 | /* Does this cover all the bases? */ | |
845 | struct expression *exp; | |
30b28db1 | 846 | struct value *value; |
8b93c638 JM |
847 | int saved_input_radix = input_radix; |
848 | ||
b20d8971 | 849 | if (var->value != NULL && variable_editable (var)) |
8b93c638 JM |
850 | { |
851 | char *s = expression; | |
852 | int i; | |
8b93c638 JM |
853 | |
854 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ | |
7a24eb7c | 855 | exp = parse_exp_1 (&s, 0, 0); |
8b93c638 JM |
856 | if (!gdb_evaluate_expression (exp, &value)) |
857 | { | |
858 | /* We cannot proceed without a valid expression. */ | |
8038e1e2 | 859 | xfree (exp); |
8b93c638 JM |
860 | return 0; |
861 | } | |
862 | ||
acd65feb | 863 | /* All types that are editable must also be changeable. */ |
b2c2bd75 | 864 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb VP |
865 | |
866 | /* The value of a changeable variable object must not be lazy. */ | |
867 | gdb_assert (!value_lazy (var->value)); | |
868 | ||
869 | /* Need to coerce the input. We want to check if the | |
870 | value of the variable object will be different | |
871 | after assignment, and the first thing value_assign | |
872 | does is coerce the input. | |
873 | For example, if we are assigning an array to a pointer variable we | |
874 | should compare the pointer with the the array's address, not with the | |
875 | array's content. */ | |
876 | value = coerce_array (value); | |
877 | ||
acd65feb VP |
878 | /* The new value may be lazy. gdb_value_assign, or |
879 | rather value_contents, will take care of this. | |
880 | If fetching of the new value will fail, gdb_value_assign | |
881 | with catch the exception. */ | |
575bbeb6 | 882 | if (!gdb_value_assign (var->value, value, &val)) |
8a1a0112 | 883 | return 0; |
b26ed50d | 884 | |
ae097835 VP |
885 | /* If the value has changed, record it, so that next -var-update can |
886 | report this change. If a variable had a value of '1', we've set it | |
887 | to '333' and then set again to '1', when -var-update will report this | |
888 | variable as changed -- because the first assignment has set the | |
889 | 'updated' flag. There's no need to optimize that, because return value | |
890 | of -var-update should be considered an approximation. */ | |
891 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
8b93c638 JM |
892 | input_radix = saved_input_radix; |
893 | return 1; | |
894 | } | |
895 | ||
896 | return 0; | |
897 | } | |
898 | ||
899 | /* Returns a malloc'ed list with all root variable objects */ | |
900 | int | |
901 | varobj_list (struct varobj ***varlist) | |
902 | { | |
903 | struct varobj **cv; | |
904 | struct varobj_root *croot; | |
905 | int mycount = rootcount; | |
906 | ||
907 | /* Alloc (rootcount + 1) entries for the result */ | |
908 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
909 | ||
910 | cv = *varlist; | |
911 | croot = rootlist; | |
912 | while ((croot != NULL) && (mycount > 0)) | |
913 | { | |
914 | *cv = croot->rootvar; | |
915 | mycount--; | |
916 | cv++; | |
917 | croot = croot->next; | |
918 | } | |
919 | /* Mark the end of the list */ | |
920 | *cv = NULL; | |
921 | ||
922 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
923 | warning |
924 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
925 | rootcount, mycount); | |
8b93c638 JM |
926 | |
927 | return rootcount; | |
928 | } | |
929 | ||
acd65feb VP |
930 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
931 | this is the first assignement after the variable object was just | |
932 | created, or changed type. In that case, just assign the value | |
933 | and return 0. | |
934 | Otherwise, assign the value and if type_changeable returns non-zero, | |
935 | find if the new value is different from the current value. | |
b26ed50d VP |
936 | Return 1 if so, and 0 if the values are equal. |
937 | ||
938 | The VALUE parameter should not be released -- the function will | |
939 | take care of releasing it when needed. */ | |
acd65feb VP |
940 | static int |
941 | install_new_value (struct varobj *var, struct value *value, int initial) | |
942 | { | |
943 | int changeable; | |
944 | int need_to_fetch; | |
945 | int changed = 0; | |
25d5ea92 | 946 | int intentionally_not_fetched = 0; |
acd65feb | 947 | |
acd65feb VP |
948 | /* We need to know the varobj's type to decide if the value should |
949 | be fetched or not. C++ fake children (public/protected/private) don't have | |
950 | a type. */ | |
951 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 952 | changeable = varobj_value_is_changeable_p (var); |
acd65feb VP |
953 | need_to_fetch = changeable; |
954 | ||
b26ed50d VP |
955 | /* We are not interested in the address of references, and given |
956 | that in C++ a reference is not rebindable, it cannot | |
957 | meaningfully change. So, get hold of the real value. */ | |
958 | if (value) | |
959 | { | |
960 | value = coerce_ref (value); | |
961 | release_value (value); | |
962 | } | |
963 | ||
acd65feb VP |
964 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
965 | /* For unions, we need to fetch the value implicitly because | |
966 | of implementation of union member fetch. When gdb | |
967 | creates a value for a field and the value of the enclosing | |
968 | structure is not lazy, it immediately copies the necessary | |
969 | bytes from the enclosing values. If the enclosing value is | |
970 | lazy, the call to value_fetch_lazy on the field will read | |
971 | the data from memory. For unions, that means we'll read the | |
972 | same memory more than once, which is not desirable. So | |
973 | fetch now. */ | |
974 | need_to_fetch = 1; | |
975 | ||
976 | /* The new value might be lazy. If the type is changeable, | |
977 | that is we'll be comparing values of this type, fetch the | |
978 | value now. Otherwise, on the next update the old value | |
979 | will be lazy, which means we've lost that old value. */ | |
980 | if (need_to_fetch && value && value_lazy (value)) | |
981 | { | |
25d5ea92 VP |
982 | struct varobj *parent = var->parent; |
983 | int frozen = var->frozen; | |
984 | for (; !frozen && parent; parent = parent->parent) | |
985 | frozen |= parent->frozen; | |
986 | ||
987 | if (frozen && initial) | |
988 | { | |
989 | /* For variables that are frozen, or are children of frozen | |
990 | variables, we don't do fetch on initial assignment. | |
991 | For non-initial assignemnt we do the fetch, since it means we're | |
992 | explicitly asked to compare the new value with the old one. */ | |
993 | intentionally_not_fetched = 1; | |
994 | } | |
995 | else if (!gdb_value_fetch_lazy (value)) | |
acd65feb | 996 | { |
acd65feb VP |
997 | /* Set the value to NULL, so that for the next -var-update, |
998 | we don't try to compare the new value with this value, | |
999 | that we couldn't even read. */ | |
1000 | value = NULL; | |
1001 | } | |
acd65feb VP |
1002 | } |
1003 | ||
1004 | /* If the type is changeable, compare the old and the new values. | |
1005 | If this is the initial assignment, we don't have any old value | |
1006 | to compare with. */ | |
7af9851d | 1007 | if (initial && changeable) |
85265413 NR |
1008 | var->print_value = value_get_print_value (value, var->format); |
1009 | else if (changeable) | |
acd65feb VP |
1010 | { |
1011 | /* If the value of the varobj was changed by -var-set-value, then the | |
1012 | value in the varobj and in the target is the same. However, that value | |
1013 | is different from the value that the varobj had after the previous | |
57e66780 | 1014 | -var-update. So need to the varobj as changed. */ |
acd65feb | 1015 | if (var->updated) |
57e66780 DJ |
1016 | { |
1017 | xfree (var->print_value); | |
1018 | var->print_value = value_get_print_value (value, var->format); | |
1019 | changed = 1; | |
1020 | } | |
acd65feb VP |
1021 | else |
1022 | { | |
1023 | /* Try to compare the values. That requires that both | |
1024 | values are non-lazy. */ | |
25d5ea92 VP |
1025 | if (var->not_fetched && value_lazy (var->value)) |
1026 | { | |
1027 | /* This is a frozen varobj and the value was never read. | |
1028 | Presumably, UI shows some "never read" indicator. | |
1029 | Now that we've fetched the real value, we need to report | |
1030 | this varobj as changed so that UI can show the real | |
1031 | value. */ | |
1032 | changed = 1; | |
1033 | } | |
1034 | else if (var->value == NULL && value == NULL) | |
acd65feb VP |
1035 | /* Equal. */ |
1036 | ; | |
1037 | else if (var->value == NULL || value == NULL) | |
57e66780 DJ |
1038 | { |
1039 | xfree (var->print_value); | |
1040 | var->print_value = value_get_print_value (value, var->format); | |
1041 | changed = 1; | |
1042 | } | |
acd65feb VP |
1043 | else |
1044 | { | |
85265413 | 1045 | char *print_value; |
acd65feb VP |
1046 | gdb_assert (!value_lazy (var->value)); |
1047 | gdb_assert (!value_lazy (value)); | |
85265413 NR |
1048 | print_value = value_get_print_value (value, var->format); |
1049 | ||
57e66780 | 1050 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 NR |
1051 | if (strcmp (var->print_value, print_value) != 0) |
1052 | { | |
1053 | xfree (var->print_value); | |
1054 | var->print_value = print_value; | |
1055 | changed = 1; | |
1056 | } | |
1057 | else | |
1058 | xfree (print_value); | |
acd65feb VP |
1059 | } |
1060 | } | |
1061 | } | |
85265413 | 1062 | |
acd65feb | 1063 | /* We must always keep the new value, since children depend on it. */ |
25d5ea92 | 1064 | if (var->value != NULL && var->value != value) |
acd65feb VP |
1065 | value_free (var->value); |
1066 | var->value = value; | |
25d5ea92 VP |
1067 | if (value && value_lazy (value) && intentionally_not_fetched) |
1068 | var->not_fetched = 1; | |
1069 | else | |
1070 | var->not_fetched = 0; | |
acd65feb | 1071 | var->updated = 0; |
85265413 | 1072 | |
b26ed50d | 1073 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1074 | |
1075 | return changed; | |
1076 | } | |
acd65feb | 1077 | |
8b93c638 JM |
1078 | /* Update the values for a variable and its children. This is a |
1079 | two-pronged attack. First, re-parse the value for the root's | |
1080 | expression to see if it's changed. Then go all the way | |
1081 | through its children, reconstructing them and noting if they've | |
1082 | changed. | |
8756216b DP |
1083 | Return value: |
1084 | < 0 for error values, see varobj.h. | |
1085 | Otherwise it is the number of children + parent changed. | |
8b93c638 | 1086 | |
25d5ea92 VP |
1087 | The EXPLICIT parameter specifies if this call is result |
1088 | of MI request to update this specific variable, or | |
1089 | result of implicit -var-update *. For implicit request, we don't | |
1090 | update frozen variables. | |
705da579 KS |
1091 | |
1092 | NOTE: This function may delete the caller's varobj. If it | |
8756216b DP |
1093 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1094 | to point to the new varobj. */ | |
8b93c638 JM |
1095 | |
1096 | int | |
25d5ea92 VP |
1097 | varobj_update (struct varobj **varp, struct varobj ***changelist, |
1098 | int explicit) | |
8b93c638 JM |
1099 | { |
1100 | int changed = 0; | |
25d5ea92 | 1101 | int type_changed = 0; |
8b93c638 JM |
1102 | int i; |
1103 | int vleft; | |
8b93c638 JM |
1104 | struct varobj *v; |
1105 | struct varobj **cv; | |
2c67cb8b | 1106 | struct varobj **templist = NULL; |
30b28db1 | 1107 | struct value *new; |
28335dcc VP |
1108 | VEC (varobj_p) *stack = NULL; |
1109 | VEC (varobj_p) *result = NULL; | |
e64d9b3d MH |
1110 | struct frame_id old_fid; |
1111 | struct frame_info *fi; | |
8b93c638 | 1112 | |
8756216b | 1113 | /* sanity check: have we been passed a pointer? */ |
a1f42e84 | 1114 | gdb_assert (changelist); |
8b93c638 | 1115 | |
25d5ea92 VP |
1116 | /* Frozen means frozen -- we don't check for any change in |
1117 | this varobj, including its going out of scope, or | |
1118 | changing type. One use case for frozen varobjs is | |
1119 | retaining previously evaluated expressions, and we don't | |
1120 | want them to be reevaluated at all. */ | |
1121 | if (!explicit && (*varp)->frozen) | |
1122 | return 0; | |
8756216b DP |
1123 | |
1124 | if (!(*varp)->root->is_valid) | |
1125 | return INVALID; | |
8b93c638 | 1126 | |
25d5ea92 | 1127 | if ((*varp)->root->rootvar == *varp) |
ae093f96 | 1128 | { |
25d5ea92 VP |
1129 | /* Save the selected stack frame, since we will need to change it |
1130 | in order to evaluate expressions. */ | |
1131 | old_fid = get_frame_id (deprecated_safe_get_selected_frame ()); | |
1132 | ||
1133 | /* Update the root variable. value_of_root can return NULL | |
1134 | if the variable is no longer around, i.e. we stepped out of | |
1135 | the frame in which a local existed. We are letting the | |
1136 | value_of_root variable dispose of the varobj if the type | |
1137 | has changed. */ | |
1138 | type_changed = 1; | |
1139 | new = value_of_root (varp, &type_changed); | |
1140 | ||
1141 | /* Restore selected frame. */ | |
1142 | fi = frame_find_by_id (old_fid); | |
1143 | if (fi) | |
1144 | select_frame (fi); | |
1145 | ||
1146 | /* If this is a "use_selected_frame" varobj, and its type has changed, | |
1147 | them note that it's changed. */ | |
1148 | if (type_changed) | |
1149 | VEC_safe_push (varobj_p, result, *varp); | |
1150 | ||
1151 | if (install_new_value ((*varp), new, type_changed)) | |
1152 | { | |
1153 | /* If type_changed is 1, install_new_value will never return | |
1154 | non-zero, so we'll never report the same variable twice. */ | |
1155 | gdb_assert (!type_changed); | |
1156 | VEC_safe_push (varobj_p, result, *varp); | |
1157 | } | |
8b93c638 | 1158 | |
25d5ea92 VP |
1159 | if (new == NULL) |
1160 | { | |
1161 | /* This means the varobj itself is out of scope. | |
1162 | Report it. */ | |
1163 | VEC_free (varobj_p, result); | |
1164 | return NOT_IN_SCOPE; | |
1165 | } | |
b20d8971 VP |
1166 | } |
1167 | ||
28335dcc | 1168 | VEC_safe_push (varobj_p, stack, *varp); |
8b93c638 | 1169 | |
8756216b | 1170 | /* Walk through the children, reconstructing them all. */ |
28335dcc | 1171 | while (!VEC_empty (varobj_p, stack)) |
8b93c638 | 1172 | { |
28335dcc VP |
1173 | v = VEC_pop (varobj_p, stack); |
1174 | ||
1175 | /* Push any children. Use reverse order so that the first | |
1176 | child is popped from the work stack first, and so | |
1177 | will be added to result first. This does not | |
1178 | affect correctness, just "nicer". */ | |
1179 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1180 | { |
28335dcc VP |
1181 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1182 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
25d5ea92 | 1183 | if (c != NULL && !c->frozen) |
28335dcc | 1184 | VEC_safe_push (varobj_p, stack, c); |
8b93c638 JM |
1185 | } |
1186 | ||
28335dcc VP |
1187 | /* Update this variable, unless it's a root, which is already |
1188 | updated. */ | |
25d5ea92 | 1189 | if (v->root->rootvar != v) |
28335dcc VP |
1190 | { |
1191 | new = value_of_child (v->parent, v->index); | |
1192 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1193 | { | |
1194 | /* Note that it's changed */ | |
1195 | VEC_safe_push (varobj_p, result, v); | |
1196 | v->updated = 0; | |
1197 | } | |
8b93c638 | 1198 | } |
8b93c638 JM |
1199 | } |
1200 | ||
8756216b | 1201 | /* Alloc (changed + 1) list entries. */ |
28335dcc | 1202 | changed = VEC_length (varobj_p, result); |
8b93c638 | 1203 | *changelist = xmalloc ((changed + 1) * sizeof (struct varobj *)); |
28335dcc | 1204 | cv = *changelist; |
8b93c638 | 1205 | |
28335dcc | 1206 | for (i = 0; i < changed; ++i) |
8b93c638 | 1207 | { |
28335dcc VP |
1208 | *cv = VEC_index (varobj_p, result, i); |
1209 | gdb_assert (*cv != NULL); | |
1210 | ++cv; | |
8b93c638 | 1211 | } |
28335dcc | 1212 | *cv = 0; |
8b93c638 | 1213 | |
93b979d6 NR |
1214 | VEC_free (varobj_p, stack); |
1215 | VEC_free (varobj_p, result); | |
1216 | ||
73a93a32 | 1217 | if (type_changed) |
8756216b | 1218 | return TYPE_CHANGED; |
73a93a32 JI |
1219 | else |
1220 | return changed; | |
8b93c638 JM |
1221 | } |
1222 | \f | |
1223 | ||
1224 | /* Helper functions */ | |
1225 | ||
1226 | /* | |
1227 | * Variable object construction/destruction | |
1228 | */ | |
1229 | ||
1230 | static int | |
fba45db2 KB |
1231 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1232 | int only_children_p) | |
8b93c638 JM |
1233 | { |
1234 | int delcount = 0; | |
1235 | ||
1236 | delete_variable_1 (resultp, &delcount, var, | |
1237 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1238 | ||
1239 | return delcount; | |
1240 | } | |
1241 | ||
1242 | /* Delete the variable object VAR and its children */ | |
1243 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1244 | and the parent is not removed we dump core. It must be always | |
1245 | initially called with remove_from_parent_p set */ | |
1246 | static void | |
72330bd6 AC |
1247 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1248 | struct varobj *var, int only_children_p, | |
1249 | int remove_from_parent_p) | |
8b93c638 | 1250 | { |
28335dcc | 1251 | int i; |
8b93c638 JM |
1252 | |
1253 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1254 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1255 | { | |
1256 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
8b93c638 | 1257 | if (!remove_from_parent_p) |
28335dcc VP |
1258 | child->parent = NULL; |
1259 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1260 | } |
28335dcc | 1261 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1262 | |
1263 | /* if we were called to delete only the children we are done here */ | |
1264 | if (only_children_p) | |
1265 | return; | |
1266 | ||
1267 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1268 | /* If the name is null, this is a temporary variable, that has not |
1269 | yet been installed, don't report it, it belongs to the caller... */ | |
1270 | if (var->obj_name != NULL) | |
8b93c638 | 1271 | { |
5b616ba1 | 1272 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1273 | *delcountp = *delcountp + 1; |
1274 | } | |
1275 | ||
1276 | /* If this variable has a parent, remove it from its parent's list */ | |
1277 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1278 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1279 | expensive list search to find the element to remove when we are | |
1280 | discarding the list afterwards */ | |
72330bd6 | 1281 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1282 | { |
28335dcc | 1283 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1284 | } |
72330bd6 | 1285 | |
73a93a32 JI |
1286 | if (var->obj_name != NULL) |
1287 | uninstall_variable (var); | |
8b93c638 JM |
1288 | |
1289 | /* Free memory associated with this variable */ | |
1290 | free_variable (var); | |
1291 | } | |
1292 | ||
1293 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1294 | static int | |
fba45db2 | 1295 | install_variable (struct varobj *var) |
8b93c638 JM |
1296 | { |
1297 | struct vlist *cv; | |
1298 | struct vlist *newvl; | |
1299 | const char *chp; | |
1300 | unsigned int index = 0; | |
1301 | unsigned int i = 1; | |
1302 | ||
1303 | for (chp = var->obj_name; *chp; chp++) | |
1304 | { | |
1305 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1306 | } | |
1307 | ||
1308 | cv = *(varobj_table + index); | |
1309 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1310 | cv = cv->next; | |
1311 | ||
1312 | if (cv != NULL) | |
8a3fe4f8 | 1313 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1314 | |
1315 | /* Add varobj to hash table */ | |
1316 | newvl = xmalloc (sizeof (struct vlist)); | |
1317 | newvl->next = *(varobj_table + index); | |
1318 | newvl->var = var; | |
1319 | *(varobj_table + index) = newvl; | |
1320 | ||
1321 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1322 | if (is_root_p (var)) |
8b93c638 JM |
1323 | { |
1324 | /* Add to list of root variables */ | |
1325 | if (rootlist == NULL) | |
1326 | var->root->next = NULL; | |
1327 | else | |
1328 | var->root->next = rootlist; | |
1329 | rootlist = var->root; | |
1330 | rootcount++; | |
1331 | } | |
1332 | ||
1333 | return 1; /* OK */ | |
1334 | } | |
1335 | ||
1336 | /* Unistall the object VAR. */ | |
1337 | static void | |
fba45db2 | 1338 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1339 | { |
1340 | struct vlist *cv; | |
1341 | struct vlist *prev; | |
1342 | struct varobj_root *cr; | |
1343 | struct varobj_root *prer; | |
1344 | const char *chp; | |
1345 | unsigned int index = 0; | |
1346 | unsigned int i = 1; | |
1347 | ||
1348 | /* Remove varobj from hash table */ | |
1349 | for (chp = var->obj_name; *chp; chp++) | |
1350 | { | |
1351 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1352 | } | |
1353 | ||
1354 | cv = *(varobj_table + index); | |
1355 | prev = NULL; | |
1356 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1357 | { | |
1358 | prev = cv; | |
1359 | cv = cv->next; | |
1360 | } | |
1361 | ||
1362 | if (varobjdebug) | |
1363 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1364 | ||
1365 | if (cv == NULL) | |
1366 | { | |
72330bd6 AC |
1367 | warning |
1368 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1369 | var->obj_name); | |
8b93c638 JM |
1370 | return; |
1371 | } | |
1372 | ||
1373 | if (prev == NULL) | |
1374 | *(varobj_table + index) = cv->next; | |
1375 | else | |
1376 | prev->next = cv->next; | |
1377 | ||
b8c9b27d | 1378 | xfree (cv); |
8b93c638 JM |
1379 | |
1380 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1381 | if (is_root_p (var)) |
8b93c638 JM |
1382 | { |
1383 | /* Remove from list of root variables */ | |
1384 | if (rootlist == var->root) | |
1385 | rootlist = var->root->next; | |
1386 | else | |
1387 | { | |
1388 | prer = NULL; | |
1389 | cr = rootlist; | |
1390 | while ((cr != NULL) && (cr->rootvar != var)) | |
1391 | { | |
1392 | prer = cr; | |
1393 | cr = cr->next; | |
1394 | } | |
1395 | if (cr == NULL) | |
1396 | { | |
72330bd6 AC |
1397 | warning |
1398 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1399 | var->obj_name); | |
8b93c638 JM |
1400 | return; |
1401 | } | |
1402 | if (prer == NULL) | |
1403 | rootlist = NULL; | |
1404 | else | |
1405 | prer->next = cr->next; | |
1406 | } | |
1407 | rootcount--; | |
1408 | } | |
1409 | ||
1410 | } | |
1411 | ||
8b93c638 JM |
1412 | /* Create and install a child of the parent of the given name */ |
1413 | static struct varobj * | |
fba45db2 | 1414 | create_child (struct varobj *parent, int index, char *name) |
8b93c638 JM |
1415 | { |
1416 | struct varobj *child; | |
1417 | char *childs_name; | |
acd65feb | 1418 | struct value *value; |
8b93c638 JM |
1419 | |
1420 | child = new_variable (); | |
1421 | ||
1422 | /* name is allocated by name_of_child */ | |
1423 | child->name = name; | |
1424 | child->index = index; | |
acd65feb | 1425 | value = value_of_child (parent, index); |
8b93c638 JM |
1426 | child->parent = parent; |
1427 | child->root = parent->root; | |
b435e160 | 1428 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1429 | child->obj_name = childs_name; |
1430 | install_variable (child); | |
1431 | ||
acd65feb VP |
1432 | /* Compute the type of the child. Must do this before |
1433 | calling install_new_value. */ | |
1434 | if (value != NULL) | |
1435 | /* If the child had no evaluation errors, var->value | |
1436 | will be non-NULL and contain a valid type. */ | |
1437 | child->type = value_type (value); | |
1438 | else | |
1439 | /* Otherwise, we must compute the type. */ | |
1440 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1441 | child->index); | |
1442 | install_new_value (child, value, 1); | |
1443 | ||
8b93c638 JM |
1444 | return child; |
1445 | } | |
8b93c638 JM |
1446 | \f |
1447 | ||
1448 | /* | |
1449 | * Miscellaneous utility functions. | |
1450 | */ | |
1451 | ||
1452 | /* Allocate memory and initialize a new variable */ | |
1453 | static struct varobj * | |
1454 | new_variable (void) | |
1455 | { | |
1456 | struct varobj *var; | |
1457 | ||
1458 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1459 | var->name = NULL; | |
1460 | var->obj_name = NULL; | |
1461 | var->index = -1; | |
1462 | var->type = NULL; | |
1463 | var->value = NULL; | |
8b93c638 JM |
1464 | var->num_children = -1; |
1465 | var->parent = NULL; | |
1466 | var->children = NULL; | |
1467 | var->format = 0; | |
1468 | var->root = NULL; | |
fb9b6b35 | 1469 | var->updated = 0; |
85265413 | 1470 | var->print_value = NULL; |
25d5ea92 VP |
1471 | var->frozen = 0; |
1472 | var->not_fetched = 0; | |
8b93c638 JM |
1473 | |
1474 | return var; | |
1475 | } | |
1476 | ||
1477 | /* Allocate memory and initialize a new root variable */ | |
1478 | static struct varobj * | |
1479 | new_root_variable (void) | |
1480 | { | |
1481 | struct varobj *var = new_variable (); | |
1482 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1483 | var->root->lang = NULL; | |
1484 | var->root->exp = NULL; | |
1485 | var->root->valid_block = NULL; | |
7a424e99 | 1486 | var->root->frame = null_frame_id; |
73a93a32 | 1487 | var->root->use_selected_frame = 0; |
8b93c638 | 1488 | var->root->rootvar = NULL; |
8756216b | 1489 | var->root->is_valid = 1; |
8b93c638 JM |
1490 | |
1491 | return var; | |
1492 | } | |
1493 | ||
1494 | /* Free any allocated memory associated with VAR. */ | |
1495 | static void | |
fba45db2 | 1496 | free_variable (struct varobj *var) |
8b93c638 JM |
1497 | { |
1498 | /* Free the expression if this is a root variable. */ | |
b2c2bd75 | 1499 | if (is_root_p (var)) |
8b93c638 | 1500 | { |
96c1eda2 | 1501 | free_current_contents (&var->root->exp); |
8038e1e2 | 1502 | xfree (var->root); |
8b93c638 JM |
1503 | } |
1504 | ||
8038e1e2 AC |
1505 | xfree (var->name); |
1506 | xfree (var->obj_name); | |
85265413 | 1507 | xfree (var->print_value); |
8038e1e2 | 1508 | xfree (var); |
8b93c638 JM |
1509 | } |
1510 | ||
74b7792f AC |
1511 | static void |
1512 | do_free_variable_cleanup (void *var) | |
1513 | { | |
1514 | free_variable (var); | |
1515 | } | |
1516 | ||
1517 | static struct cleanup * | |
1518 | make_cleanup_free_variable (struct varobj *var) | |
1519 | { | |
1520 | return make_cleanup (do_free_variable_cleanup, var); | |
1521 | } | |
1522 | ||
6766a268 DJ |
1523 | /* This returns the type of the variable. It also skips past typedefs |
1524 | to return the real type of the variable. | |
94b66fa7 KS |
1525 | |
1526 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1527 | except within get_target_type and get_type. */ | |
8b93c638 | 1528 | static struct type * |
fba45db2 | 1529 | get_type (struct varobj *var) |
8b93c638 JM |
1530 | { |
1531 | struct type *type; | |
1532 | type = var->type; | |
1533 | ||
6766a268 DJ |
1534 | if (type != NULL) |
1535 | type = check_typedef (type); | |
8b93c638 JM |
1536 | |
1537 | return type; | |
1538 | } | |
1539 | ||
6e2a9270 VP |
1540 | /* Return the type of the value that's stored in VAR, |
1541 | or that would have being stored there if the | |
1542 | value were accessible. | |
1543 | ||
1544 | This differs from VAR->type in that VAR->type is always | |
1545 | the true type of the expession in the source language. | |
1546 | The return value of this function is the type we're | |
1547 | actually storing in varobj, and using for displaying | |
1548 | the values and for comparing previous and new values. | |
1549 | ||
1550 | For example, top-level references are always stripped. */ | |
1551 | static struct type * | |
1552 | get_value_type (struct varobj *var) | |
1553 | { | |
1554 | struct type *type; | |
1555 | ||
1556 | if (var->value) | |
1557 | type = value_type (var->value); | |
1558 | else | |
1559 | type = var->type; | |
1560 | ||
1561 | type = check_typedef (type); | |
1562 | ||
1563 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1564 | type = get_target_type (type); | |
1565 | ||
1566 | type = check_typedef (type); | |
1567 | ||
1568 | return type; | |
1569 | } | |
1570 | ||
8b93c638 | 1571 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
1572 | past typedefs, just like get_type (). |
1573 | ||
1574 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1575 | except within get_target_type and get_type. */ | |
8b93c638 | 1576 | static struct type * |
fba45db2 | 1577 | get_target_type (struct type *type) |
8b93c638 JM |
1578 | { |
1579 | if (type != NULL) | |
1580 | { | |
1581 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1582 | if (type != NULL) |
1583 | type = check_typedef (type); | |
8b93c638 JM |
1584 | } |
1585 | ||
1586 | return type; | |
1587 | } | |
1588 | ||
1589 | /* What is the default display for this variable? We assume that | |
1590 | everything is "natural". Any exceptions? */ | |
1591 | static enum varobj_display_formats | |
fba45db2 | 1592 | variable_default_display (struct varobj *var) |
8b93c638 JM |
1593 | { |
1594 | return FORMAT_NATURAL; | |
1595 | } | |
1596 | ||
8b93c638 JM |
1597 | /* FIXME: The following should be generic for any pointer */ |
1598 | static void | |
fba45db2 | 1599 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
1600 | { |
1601 | struct cpstack *s; | |
1602 | ||
1603 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1604 | s->name = name; | |
1605 | s->next = *pstack; | |
1606 | *pstack = s; | |
1607 | } | |
1608 | ||
1609 | /* FIXME: The following should be generic for any pointer */ | |
1610 | static char * | |
fba45db2 | 1611 | cppop (struct cpstack **pstack) |
8b93c638 JM |
1612 | { |
1613 | struct cpstack *s; | |
1614 | char *v; | |
1615 | ||
1616 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1617 | return NULL; | |
1618 | ||
1619 | s = *pstack; | |
1620 | v = s->name; | |
1621 | *pstack = (*pstack)->next; | |
b8c9b27d | 1622 | xfree (s); |
8b93c638 JM |
1623 | |
1624 | return v; | |
1625 | } | |
1626 | \f | |
1627 | /* | |
1628 | * Language-dependencies | |
1629 | */ | |
1630 | ||
1631 | /* Common entry points */ | |
1632 | ||
1633 | /* Get the language of variable VAR. */ | |
1634 | static enum varobj_languages | |
fba45db2 | 1635 | variable_language (struct varobj *var) |
8b93c638 JM |
1636 | { |
1637 | enum varobj_languages lang; | |
1638 | ||
1639 | switch (var->root->exp->language_defn->la_language) | |
1640 | { | |
1641 | default: | |
1642 | case language_c: | |
1643 | lang = vlang_c; | |
1644 | break; | |
1645 | case language_cplus: | |
1646 | lang = vlang_cplus; | |
1647 | break; | |
1648 | case language_java: | |
1649 | lang = vlang_java; | |
1650 | break; | |
1651 | } | |
1652 | ||
1653 | return lang; | |
1654 | } | |
1655 | ||
1656 | /* Return the number of children for a given variable. | |
1657 | The result of this function is defined by the language | |
1658 | implementation. The number of children returned by this function | |
1659 | is the number of children that the user will see in the variable | |
1660 | display. */ | |
1661 | static int | |
fba45db2 | 1662 | number_of_children (struct varobj *var) |
8b93c638 JM |
1663 | { |
1664 | return (*var->root->lang->number_of_children) (var);; | |
1665 | } | |
1666 | ||
1667 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1668 | static char * | |
fba45db2 | 1669 | name_of_variable (struct varobj *var) |
8b93c638 JM |
1670 | { |
1671 | return (*var->root->lang->name_of_variable) (var); | |
1672 | } | |
1673 | ||
1674 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1675 | static char * | |
fba45db2 | 1676 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
1677 | { |
1678 | return (*var->root->lang->name_of_child) (var, index); | |
1679 | } | |
1680 | ||
30b28db1 | 1681 | /* What is the ``struct value *'' of the root variable VAR? |
73a93a32 JI |
1682 | TYPE_CHANGED controls what to do if the type of a |
1683 | use_selected_frame = 1 variable changes. On input, | |
1684 | TYPE_CHANGED = 1 means discard the old varobj, and replace | |
1685 | it with this one. TYPE_CHANGED = 0 means leave it around. | |
1686 | NB: In both cases, var_handle will point to the new varobj, | |
1687 | so if you use TYPE_CHANGED = 0, you will have to stash the | |
1688 | old varobj pointer away somewhere before calling this. | |
1689 | On return, TYPE_CHANGED will be 1 if the type has changed, and | |
1690 | 0 otherwise. */ | |
30b28db1 | 1691 | static struct value * |
fba45db2 | 1692 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 1693 | { |
73a93a32 JI |
1694 | struct varobj *var; |
1695 | ||
1696 | if (var_handle == NULL) | |
1697 | return NULL; | |
1698 | ||
1699 | var = *var_handle; | |
1700 | ||
1701 | /* This should really be an exception, since this should | |
1702 | only get called with a root variable. */ | |
1703 | ||
b2c2bd75 | 1704 | if (!is_root_p (var)) |
73a93a32 JI |
1705 | return NULL; |
1706 | ||
1707 | if (var->root->use_selected_frame) | |
1708 | { | |
1709 | struct varobj *tmp_var; | |
1710 | char *old_type, *new_type; | |
6225abfa | 1711 | |
73a93a32 JI |
1712 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
1713 | USE_SELECTED_FRAME); | |
1714 | if (tmp_var == NULL) | |
1715 | { | |
1716 | return NULL; | |
1717 | } | |
6225abfa | 1718 | old_type = varobj_get_type (var); |
73a93a32 | 1719 | new_type = varobj_get_type (tmp_var); |
72330bd6 | 1720 | if (strcmp (old_type, new_type) == 0) |
73a93a32 JI |
1721 | { |
1722 | varobj_delete (tmp_var, NULL, 0); | |
1723 | *type_changed = 0; | |
1724 | } | |
1725 | else | |
1726 | { | |
1727 | if (*type_changed) | |
1728 | { | |
72330bd6 | 1729 | tmp_var->obj_name = |
73a93a32 | 1730 | savestring (var->obj_name, strlen (var->obj_name)); |
f7635dd9 | 1731 | varobj_delete (var, NULL, 0); |
73a93a32 JI |
1732 | } |
1733 | else | |
1734 | { | |
72330bd6 | 1735 | tmp_var->obj_name = varobj_gen_name (); |
73a93a32 JI |
1736 | } |
1737 | install_variable (tmp_var); | |
1738 | *var_handle = tmp_var; | |
705da579 | 1739 | var = *var_handle; |
73a93a32 JI |
1740 | *type_changed = 1; |
1741 | } | |
74dddad3 MS |
1742 | xfree (old_type); |
1743 | xfree (new_type); | |
73a93a32 JI |
1744 | } |
1745 | else | |
1746 | { | |
1747 | *type_changed = 0; | |
1748 | } | |
1749 | ||
1750 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1751 | } |
1752 | ||
30b28db1 AC |
1753 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
1754 | static struct value * | |
fba45db2 | 1755 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 1756 | { |
30b28db1 | 1757 | struct value *value; |
8b93c638 JM |
1758 | |
1759 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1760 | ||
8b93c638 JM |
1761 | return value; |
1762 | } | |
1763 | ||
8b93c638 JM |
1764 | /* Is this variable editable? Use the variable's type to make |
1765 | this determination. */ | |
1766 | static int | |
fba45db2 | 1767 | variable_editable (struct varobj *var) |
8b93c638 JM |
1768 | { |
1769 | return (*var->root->lang->variable_editable) (var); | |
1770 | } | |
1771 | ||
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 | ||
acd65feb VP |
1803 | /* Return non-zero if changes in value of VAR |
1804 | must be detected and reported by -var-update. | |
1805 | Return zero is -var-update should never report | |
1806 | changes of such values. This makes sense for structures | |
1807 | (since the changes in children values will be reported separately), | |
1808 | or for artifical objects (like 'public' pseudo-field in C++). | |
1809 | ||
1810 | Return value of 0 means that gdb need not call value_fetch_lazy | |
1811 | for the value of this variable object. */ | |
8b93c638 | 1812 | static int |
b2c2bd75 | 1813 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
1814 | { |
1815 | int r; | |
1816 | struct type *type; | |
1817 | ||
1818 | if (CPLUS_FAKE_CHILD (var)) | |
1819 | return 0; | |
1820 | ||
6e2a9270 | 1821 | type = get_value_type (var); |
8b93c638 JM |
1822 | |
1823 | switch (TYPE_CODE (type)) | |
1824 | { | |
72330bd6 AC |
1825 | case TYPE_CODE_STRUCT: |
1826 | case TYPE_CODE_UNION: | |
1827 | case TYPE_CODE_ARRAY: | |
1828 | r = 0; | |
1829 | break; | |
8b93c638 | 1830 | |
72330bd6 AC |
1831 | default: |
1832 | r = 1; | |
8b93c638 JM |
1833 | } |
1834 | ||
1835 | return r; | |
1836 | } | |
1837 | ||
2024f65a VP |
1838 | /* Given the value and the type of a variable object, |
1839 | adjust the value and type to those necessary | |
1840 | for getting children of the variable object. | |
1841 | This includes dereferencing top-level references | |
1842 | to all types and dereferencing pointers to | |
1843 | structures. | |
1844 | ||
1845 | Both TYPE and *TYPE should be non-null. VALUE | |
1846 | can be null if we want to only translate type. | |
1847 | *VALUE can be null as well -- if the parent | |
1848 | value is not known. */ | |
1849 | static void | |
1850 | adjust_value_for_child_access (struct value **value, | |
1851 | struct type **type) | |
1852 | { | |
1853 | gdb_assert (type && *type); | |
1854 | ||
1855 | *type = check_typedef (*type); | |
1856 | ||
1857 | /* The type of value stored in varobj, that is passed | |
1858 | to us, is already supposed to be | |
1859 | reference-stripped. */ | |
1860 | ||
1861 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
1862 | ||
1863 | /* Pointers to structures are treated just like | |
1864 | structures when accessing children. Don't | |
1865 | dererences pointers to other types. */ | |
1866 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
1867 | { | |
1868 | struct type *target_type = get_target_type (*type); | |
1869 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
1870 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
1871 | { | |
1872 | if (value && *value) | |
1873 | gdb_value_ind (*value, value); | |
1874 | *type = target_type; | |
1875 | } | |
1876 | } | |
1877 | ||
1878 | /* The 'get_target_type' function calls check_typedef on | |
1879 | result, so we can immediately check type code. No | |
1880 | need to call check_typedef here. */ | |
1881 | } | |
1882 | ||
8b93c638 JM |
1883 | /* C */ |
1884 | static int | |
fba45db2 | 1885 | c_number_of_children (struct varobj *var) |
8b93c638 | 1886 | { |
2024f65a VP |
1887 | struct type *type = get_value_type (var); |
1888 | int children = 0; | |
8b93c638 | 1889 | struct type *target; |
8b93c638 | 1890 | |
2024f65a | 1891 | adjust_value_for_child_access (NULL, &type); |
8b93c638 | 1892 | target = get_target_type (type); |
8b93c638 JM |
1893 | |
1894 | switch (TYPE_CODE (type)) | |
1895 | { | |
1896 | case TYPE_CODE_ARRAY: | |
1897 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
72330bd6 | 1898 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) |
8b93c638 JM |
1899 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
1900 | else | |
74a44383 DJ |
1901 | /* If we don't know how many elements there are, don't display |
1902 | any. */ | |
1903 | children = 0; | |
8b93c638 JM |
1904 | break; |
1905 | ||
1906 | case TYPE_CODE_STRUCT: | |
1907 | case TYPE_CODE_UNION: | |
1908 | children = TYPE_NFIELDS (type); | |
1909 | break; | |
1910 | ||
1911 | case TYPE_CODE_PTR: | |
2024f65a VP |
1912 | /* The type here is a pointer to non-struct. Typically, pointers |
1913 | have one child, except for function ptrs, which have no children, | |
1914 | and except for void*, as we don't know what to show. | |
1915 | ||
0755e6c1 FN |
1916 | We can show char* so we allow it to be dereferenced. If you decide |
1917 | to test for it, please mind that a little magic is necessary to | |
1918 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
1919 | TYPE_NAME == "char" */ | |
2024f65a VP |
1920 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
1921 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
1922 | children = 0; | |
1923 | else | |
1924 | children = 1; | |
8b93c638 JM |
1925 | break; |
1926 | ||
1927 | default: | |
1928 | /* Other types have no children */ | |
1929 | break; | |
1930 | } | |
1931 | ||
1932 | return children; | |
1933 | } | |
1934 | ||
1935 | static char * | |
fba45db2 | 1936 | c_name_of_variable (struct varobj *parent) |
8b93c638 JM |
1937 | { |
1938 | return savestring (parent->name, strlen (parent->name)); | |
1939 | } | |
1940 | ||
bbec2603 VP |
1941 | /* Return the value of element TYPE_INDEX of a structure |
1942 | value VALUE. VALUE's type should be a structure, | |
1943 | or union, or a typedef to struct/union. | |
1944 | ||
1945 | Returns NULL if getting the value fails. Never throws. */ | |
1946 | static struct value * | |
1947 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 1948 | { |
bbec2603 VP |
1949 | struct value *result = NULL; |
1950 | volatile struct gdb_exception e; | |
8b93c638 | 1951 | |
bbec2603 VP |
1952 | struct type *type = value_type (value); |
1953 | type = check_typedef (type); | |
1954 | ||
1955 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
1956 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 1957 | |
bbec2603 VP |
1958 | TRY_CATCH (e, RETURN_MASK_ERROR) |
1959 | { | |
1960 | if (TYPE_FIELD_STATIC (type, type_index)) | |
1961 | result = value_static_field (type, type_index); | |
1962 | else | |
1963 | result = value_primitive_field (value, 0, type_index, type); | |
1964 | } | |
1965 | if (e.reason < 0) | |
1966 | { | |
1967 | return NULL; | |
1968 | } | |
1969 | else | |
1970 | { | |
1971 | return result; | |
1972 | } | |
1973 | } | |
1974 | ||
1975 | /* Obtain the information about child INDEX of the variable | |
1976 | object PARENT. | |
1977 | If CNAME is not null, sets *CNAME to the name of the child relative | |
1978 | to the parent. | |
1979 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
1980 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
1981 | ||
1982 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
1983 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
1984 | to NULL. */ | |
1985 | static void | |
1986 | c_describe_child (struct varobj *parent, int index, | |
1987 | char **cname, struct value **cvalue, struct type **ctype) | |
1988 | { | |
1989 | struct value *value = parent->value; | |
2024f65a | 1990 | struct type *type = get_value_type (parent); |
bbec2603 VP |
1991 | |
1992 | if (cname) | |
1993 | *cname = NULL; | |
1994 | if (cvalue) | |
1995 | *cvalue = NULL; | |
1996 | if (ctype) | |
1997 | *ctype = NULL; | |
1998 | ||
2024f65a | 1999 | adjust_value_for_child_access (&value, &type); |
bbec2603 | 2000 | |
8b93c638 JM |
2001 | switch (TYPE_CODE (type)) |
2002 | { | |
2003 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
2004 | if (cname) |
2005 | *cname = xstrprintf ("%d", index | |
2006 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
2007 | ||
2008 | if (cvalue && value) | |
2009 | { | |
2010 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
2011 | struct value *indval = | |
2012 | value_from_longest (builtin_type_int, (LONGEST) real_index); | |
2013 | gdb_value_subscript (value, indval, cvalue); | |
2014 | } | |
2015 | ||
2016 | if (ctype) | |
2017 | *ctype = get_target_type (type); | |
2018 | ||
8b93c638 JM |
2019 | break; |
2020 | ||
2021 | case TYPE_CODE_STRUCT: | |
2022 | case TYPE_CODE_UNION: | |
bbec2603 VP |
2023 | if (cname) |
2024 | { | |
2025 | char *string = TYPE_FIELD_NAME (type, index); | |
2026 | *cname = savestring (string, strlen (string)); | |
2027 | } | |
2028 | ||
2029 | if (cvalue && value) | |
2030 | { | |
2031 | /* For C, varobj index is the same as type index. */ | |
2032 | *cvalue = value_struct_element_index (value, index); | |
2033 | } | |
2034 | ||
2035 | if (ctype) | |
2036 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2037 | ||
8b93c638 JM |
2038 | break; |
2039 | ||
2040 | case TYPE_CODE_PTR: | |
bbec2603 VP |
2041 | if (cname) |
2042 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 2043 | |
bbec2603 VP |
2044 | if (cvalue && value) |
2045 | gdb_value_ind (value, cvalue); | |
2046 | ||
2024f65a VP |
2047 | /* Don't use get_target_type because it calls |
2048 | check_typedef and here, we want to show the true | |
2049 | declared type of the variable. */ | |
bbec2603 | 2050 | if (ctype) |
2024f65a | 2051 | *ctype = TYPE_TARGET_TYPE (type); |
bbec2603 | 2052 | |
8b93c638 JM |
2053 | break; |
2054 | ||
2055 | default: | |
2056 | /* This should not happen */ | |
bbec2603 VP |
2057 | if (cname) |
2058 | *cname = xstrdup ("???"); | |
2059 | /* Don't set value and type, we don't know then. */ | |
8b93c638 | 2060 | } |
bbec2603 | 2061 | } |
8b93c638 | 2062 | |
bbec2603 VP |
2063 | static char * |
2064 | c_name_of_child (struct varobj *parent, int index) | |
2065 | { | |
2066 | char *name; | |
2067 | c_describe_child (parent, index, &name, NULL, NULL); | |
8b93c638 JM |
2068 | return name; |
2069 | } | |
2070 | ||
30b28db1 | 2071 | static struct value * |
fba45db2 | 2072 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 2073 | { |
5e572bb4 | 2074 | struct value *new_val = NULL; |
73a93a32 | 2075 | struct varobj *var = *var_handle; |
8b93c638 JM |
2076 | struct frame_info *fi; |
2077 | int within_scope; | |
2078 | ||
73a93a32 | 2079 | /* Only root variables can be updated... */ |
b2c2bd75 | 2080 | if (!is_root_p (var)) |
73a93a32 JI |
2081 | /* Not a root var */ |
2082 | return NULL; | |
2083 | ||
72330bd6 | 2084 | |
8b93c638 | 2085 | /* Determine whether the variable is still around. */ |
b20d8971 | 2086 | if (var->root->valid_block == NULL || var->root->use_selected_frame) |
8b93c638 JM |
2087 | within_scope = 1; |
2088 | else | |
2089 | { | |
e64d9b3d | 2090 | fi = frame_find_by_id (var->root->frame); |
8b93c638 JM |
2091 | within_scope = fi != NULL; |
2092 | /* FIXME: select_frame could fail */ | |
d2353924 NR |
2093 | if (fi) |
2094 | { | |
2095 | CORE_ADDR pc = get_frame_pc (fi); | |
2096 | if (pc < BLOCK_START (var->root->valid_block) || | |
2097 | pc >= BLOCK_END (var->root->valid_block)) | |
2098 | within_scope = 0; | |
2d43bda2 NR |
2099 | else |
2100 | select_frame (fi); | |
d2353924 | 2101 | } |
8b93c638 | 2102 | } |
72330bd6 | 2103 | |
8b93c638 JM |
2104 | if (within_scope) |
2105 | { | |
73a93a32 | 2106 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
2107 | expression fails we want to just return NULL. */ |
2108 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
2109 | return new_val; |
2110 | } | |
2111 | ||
2112 | return NULL; | |
2113 | } | |
2114 | ||
30b28db1 | 2115 | static struct value * |
fba45db2 | 2116 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2117 | { |
bbec2603 VP |
2118 | struct value *value = NULL; |
2119 | c_describe_child (parent, index, NULL, &value, NULL); | |
8b93c638 JM |
2120 | |
2121 | return value; | |
2122 | } | |
2123 | ||
2124 | static struct type * | |
fba45db2 | 2125 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2126 | { |
bbec2603 VP |
2127 | struct type *type = NULL; |
2128 | c_describe_child (parent, index, NULL, NULL, &type); | |
8b93c638 JM |
2129 | return type; |
2130 | } | |
2131 | ||
2132 | static int | |
fba45db2 | 2133 | c_variable_editable (struct varobj *var) |
8b93c638 | 2134 | { |
6e2a9270 | 2135 | switch (TYPE_CODE (get_value_type (var))) |
8b93c638 JM |
2136 | { |
2137 | case TYPE_CODE_STRUCT: | |
2138 | case TYPE_CODE_UNION: | |
2139 | case TYPE_CODE_ARRAY: | |
2140 | case TYPE_CODE_FUNC: | |
8b93c638 JM |
2141 | case TYPE_CODE_METHOD: |
2142 | return 0; | |
2143 | break; | |
2144 | ||
2145 | default: | |
2146 | return 1; | |
2147 | break; | |
2148 | } | |
2149 | } | |
2150 | ||
2151 | static char * | |
fba45db2 | 2152 | c_value_of_variable (struct varobj *var) |
8b93c638 | 2153 | { |
14b3d9c9 JB |
2154 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2155 | it will print out its children instead of "{...}". So we need to | |
2156 | catch that case explicitly. */ | |
2157 | struct type *type = get_type (var); | |
e64d9b3d | 2158 | |
14b3d9c9 JB |
2159 | /* Strip top-level references. */ |
2160 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2161 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2162 | ||
2163 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2164 | { |
2165 | case TYPE_CODE_STRUCT: | |
2166 | case TYPE_CODE_UNION: | |
2167 | return xstrdup ("{...}"); | |
2168 | /* break; */ | |
2169 | ||
2170 | case TYPE_CODE_ARRAY: | |
2171 | { | |
e64d9b3d | 2172 | char *number; |
b435e160 | 2173 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2174 | return (number); |
8b93c638 JM |
2175 | } |
2176 | /* break; */ | |
2177 | ||
2178 | default: | |
2179 | { | |
575bbeb6 KS |
2180 | if (var->value == NULL) |
2181 | { | |
2182 | /* This can happen if we attempt to get the value of a struct | |
2183 | member when the parent is an invalid pointer. This is an | |
2184 | error condition, so we should tell the caller. */ | |
2185 | return NULL; | |
2186 | } | |
2187 | else | |
2188 | { | |
25d5ea92 VP |
2189 | if (var->not_fetched && value_lazy (var->value)) |
2190 | /* Frozen variable and no value yet. We don't | |
2191 | implicitly fetch the value. MI response will | |
2192 | use empty string for the value, which is OK. */ | |
2193 | return NULL; | |
2194 | ||
b2c2bd75 | 2195 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2196 | gdb_assert (!value_lazy (var->value)); |
85265413 NR |
2197 | return value_get_print_value (var->value, var->format); |
2198 | } | |
e64d9b3d | 2199 | } |
8b93c638 JM |
2200 | } |
2201 | } | |
2202 | \f | |
2203 | ||
2204 | /* C++ */ | |
2205 | ||
2206 | static int | |
fba45db2 | 2207 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2208 | { |
2209 | struct type *type; | |
2210 | int children, dont_know; | |
2211 | ||
2212 | dont_know = 1; | |
2213 | children = 0; | |
2214 | ||
2215 | if (!CPLUS_FAKE_CHILD (var)) | |
2216 | { | |
2024f65a VP |
2217 | type = get_value_type (var); |
2218 | adjust_value_for_child_access (NULL, &type); | |
8b93c638 JM |
2219 | |
2220 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2221 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2222 | { |
2223 | int kids[3]; | |
2224 | ||
2225 | cplus_class_num_children (type, kids); | |
2226 | if (kids[v_public] != 0) | |
2227 | children++; | |
2228 | if (kids[v_private] != 0) | |
2229 | children++; | |
2230 | if (kids[v_protected] != 0) | |
2231 | children++; | |
2232 | ||
2233 | /* Add any baseclasses */ | |
2234 | children += TYPE_N_BASECLASSES (type); | |
2235 | dont_know = 0; | |
2236 | ||
2237 | /* FIXME: save children in var */ | |
2238 | } | |
2239 | } | |
2240 | else | |
2241 | { | |
2242 | int kids[3]; | |
2243 | ||
2024f65a VP |
2244 | type = get_value_type (var->parent); |
2245 | adjust_value_for_child_access (NULL, &type); | |
8b93c638 JM |
2246 | |
2247 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2248 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2249 | children = kids[v_public]; |
6e382aa3 | 2250 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2251 | children = kids[v_private]; |
2252 | else | |
2253 | children = kids[v_protected]; | |
2254 | dont_know = 0; | |
2255 | } | |
2256 | ||
2257 | if (dont_know) | |
2258 | children = c_number_of_children (var); | |
2259 | ||
2260 | return children; | |
2261 | } | |
2262 | ||
2263 | /* Compute # of public, private, and protected variables in this class. | |
2264 | That means we need to descend into all baseclasses and find out | |
2265 | how many are there, too. */ | |
2266 | static void | |
1669605f | 2267 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2268 | { |
2269 | int i; | |
2270 | ||
2271 | children[v_public] = 0; | |
2272 | children[v_private] = 0; | |
2273 | children[v_protected] = 0; | |
2274 | ||
2275 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2276 | { | |
2277 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2278 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2279 | continue; |
2280 | ||
2281 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2282 | children[v_protected]++; | |
2283 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2284 | children[v_private]++; | |
2285 | else | |
2286 | children[v_public]++; | |
2287 | } | |
2288 | } | |
2289 | ||
2290 | static char * | |
fba45db2 | 2291 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2292 | { |
2293 | return c_name_of_variable (parent); | |
2294 | } | |
2295 | ||
2024f65a VP |
2296 | enum accessibility { private_field, protected_field, public_field }; |
2297 | ||
2298 | /* Check if field INDEX of TYPE has the specified accessibility. | |
2299 | Return 0 if so and 1 otherwise. */ | |
2300 | static int | |
2301 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 2302 | { |
2024f65a VP |
2303 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
2304 | return 1; | |
2305 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
2306 | return 1; | |
2307 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
2308 | && !TYPE_FIELD_PROTECTED (type, index)) | |
2309 | return 1; | |
2310 | else | |
2311 | return 0; | |
2312 | } | |
2313 | ||
2314 | static void | |
2315 | cplus_describe_child (struct varobj *parent, int index, | |
2316 | char **cname, struct value **cvalue, struct type **ctype) | |
2317 | { | |
348144ba | 2318 | char *name = NULL; |
2024f65a | 2319 | struct value *value; |
8b93c638 | 2320 | struct type *type; |
8b93c638 | 2321 | |
2024f65a VP |
2322 | if (cname) |
2323 | *cname = NULL; | |
2324 | if (cvalue) | |
2325 | *cvalue = NULL; | |
2326 | if (ctype) | |
2327 | *ctype = NULL; | |
2328 | ||
2329 | ||
8b93c638 JM |
2330 | if (CPLUS_FAKE_CHILD (parent)) |
2331 | { | |
2024f65a VP |
2332 | value = parent->parent->value; |
2333 | type = get_value_type (parent->parent); | |
8b93c638 JM |
2334 | } |
2335 | else | |
2024f65a VP |
2336 | { |
2337 | value = parent->value; | |
2338 | type = get_value_type (parent); | |
2339 | } | |
8b93c638 | 2340 | |
2024f65a VP |
2341 | adjust_value_for_child_access (&value, &type); |
2342 | ||
2343 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2344 | || TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
8b93c638 | 2345 | { |
8b93c638 JM |
2346 | if (CPLUS_FAKE_CHILD (parent)) |
2347 | { | |
6e382aa3 JJ |
2348 | /* The fields of the class type are ordered as they |
2349 | appear in the class. We are given an index for a | |
2350 | particular access control type ("public","protected", | |
2351 | or "private"). We must skip over fields that don't | |
2352 | have the access control we are looking for to properly | |
2353 | find the indexed field. */ | |
2354 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 2355 | enum accessibility acc = public_field; |
6e382aa3 | 2356 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 2357 | acc = private_field; |
6e382aa3 | 2358 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
2359 | acc = protected_field; |
2360 | ||
2361 | while (index >= 0) | |
6e382aa3 | 2362 | { |
2024f65a VP |
2363 | if (TYPE_VPTR_BASETYPE (type) == type |
2364 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2365 | ; /* ignore vptr */ | |
2366 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
2367 | --index; |
2368 | ++type_index; | |
6e382aa3 | 2369 | } |
2024f65a VP |
2370 | --type_index; |
2371 | ||
2372 | if (cname) | |
2373 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
2374 | ||
2375 | if (cvalue && value) | |
2376 | *cvalue = value_struct_element_index (value, type_index); | |
2377 | ||
2378 | if (ctype) | |
2379 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
2380 | } | |
2381 | else if (index < TYPE_N_BASECLASSES (type)) | |
2382 | { | |
2383 | /* This is a baseclass. */ | |
2384 | if (cname) | |
2385 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
2386 | ||
2387 | if (cvalue && value) | |
6e382aa3 | 2388 | { |
2024f65a | 2389 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
6e382aa3 JJ |
2390 | } |
2391 | ||
2024f65a VP |
2392 | if (ctype) |
2393 | { | |
2394 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2395 | } | |
8b93c638 | 2396 | } |
8b93c638 JM |
2397 | else |
2398 | { | |
348144ba | 2399 | char *access = NULL; |
6e382aa3 | 2400 | int children[3]; |
2024f65a | 2401 | cplus_class_num_children (type, children); |
6e382aa3 | 2402 | |
8b93c638 | 2403 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2404 | only be "public", "private", or "protected" |
2405 | ||
2406 | The special "fake" children are always output by varobj in | |
2407 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2408 | index -= TYPE_N_BASECLASSES (type); |
2409 | switch (index) | |
2410 | { | |
2411 | case 0: | |
6e382aa3 | 2412 | if (children[v_public] > 0) |
2024f65a | 2413 | access = "public"; |
6e382aa3 | 2414 | else if (children[v_private] > 0) |
2024f65a | 2415 | access = "private"; |
6e382aa3 | 2416 | else |
2024f65a | 2417 | access = "protected"; |
6e382aa3 | 2418 | break; |
8b93c638 | 2419 | case 1: |
6e382aa3 | 2420 | if (children[v_public] > 0) |
8b93c638 | 2421 | { |
6e382aa3 | 2422 | if (children[v_private] > 0) |
2024f65a | 2423 | access = "private"; |
6e382aa3 | 2424 | else |
2024f65a | 2425 | access = "protected"; |
8b93c638 | 2426 | } |
6e382aa3 | 2427 | else if (children[v_private] > 0) |
2024f65a | 2428 | access = "protected"; |
6e382aa3 | 2429 | break; |
8b93c638 | 2430 | case 2: |
6e382aa3 | 2431 | /* Must be protected */ |
2024f65a | 2432 | access = "protected"; |
6e382aa3 | 2433 | break; |
8b93c638 JM |
2434 | default: |
2435 | /* error! */ | |
2436 | break; | |
2437 | } | |
348144ba MS |
2438 | |
2439 | gdb_assert (access); | |
2024f65a VP |
2440 | if (cname) |
2441 | *cname = xstrdup (access); | |
8b93c638 | 2442 | |
2024f65a VP |
2443 | /* Value and type are null here. */ |
2444 | } | |
8b93c638 | 2445 | } |
8b93c638 JM |
2446 | else |
2447 | { | |
2024f65a VP |
2448 | c_describe_child (parent, index, cname, cvalue, ctype); |
2449 | } | |
2450 | } | |
8b93c638 | 2451 | |
2024f65a VP |
2452 | static char * |
2453 | cplus_name_of_child (struct varobj *parent, int index) | |
2454 | { | |
2455 | char *name = NULL; | |
2456 | cplus_describe_child (parent, index, &name, NULL, NULL); | |
8b93c638 JM |
2457 | return name; |
2458 | } | |
2459 | ||
30b28db1 | 2460 | static struct value * |
fba45db2 | 2461 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2462 | { |
73a93a32 | 2463 | return c_value_of_root (var_handle); |
8b93c638 JM |
2464 | } |
2465 | ||
30b28db1 | 2466 | static struct value * |
fba45db2 | 2467 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2468 | { |
2024f65a VP |
2469 | struct value *value = NULL; |
2470 | cplus_describe_child (parent, index, NULL, &value, NULL); | |
8b93c638 JM |
2471 | return value; |
2472 | } | |
2473 | ||
2474 | static struct type * | |
fba45db2 | 2475 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2476 | { |
2024f65a VP |
2477 | struct type *type = NULL; |
2478 | cplus_describe_child (parent, index, NULL, NULL, &type); | |
8b93c638 JM |
2479 | return type; |
2480 | } | |
2481 | ||
2482 | static int | |
fba45db2 | 2483 | cplus_variable_editable (struct varobj *var) |
8b93c638 JM |
2484 | { |
2485 | if (CPLUS_FAKE_CHILD (var)) | |
2486 | return 0; | |
2487 | ||
2488 | return c_variable_editable (var); | |
2489 | } | |
2490 | ||
2491 | static char * | |
fba45db2 | 2492 | cplus_value_of_variable (struct varobj *var) |
8b93c638 JM |
2493 | { |
2494 | ||
2495 | /* If we have one of our special types, don't print out | |
2496 | any value. */ | |
2497 | if (CPLUS_FAKE_CHILD (var)) | |
2498 | return xstrdup (""); | |
2499 | ||
2500 | return c_value_of_variable (var); | |
2501 | } | |
2502 | \f | |
2503 | /* Java */ | |
2504 | ||
2505 | static int | |
fba45db2 | 2506 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2507 | { |
2508 | return cplus_number_of_children (var); | |
2509 | } | |
2510 | ||
2511 | static char * | |
fba45db2 | 2512 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2513 | { |
2514 | char *p, *name; | |
2515 | ||
2516 | name = cplus_name_of_variable (parent); | |
2517 | /* If the name has "-" in it, it is because we | |
2518 | needed to escape periods in the name... */ | |
2519 | p = name; | |
2520 | ||
2521 | while (*p != '\000') | |
2522 | { | |
2523 | if (*p == '-') | |
2524 | *p = '.'; | |
2525 | p++; | |
2526 | } | |
2527 | ||
2528 | return name; | |
2529 | } | |
2530 | ||
2531 | static char * | |
fba45db2 | 2532 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2533 | { |
2534 | char *name, *p; | |
2535 | ||
2536 | name = cplus_name_of_child (parent, index); | |
2537 | /* Escape any periods in the name... */ | |
2538 | p = name; | |
2539 | ||
2540 | while (*p != '\000') | |
2541 | { | |
2542 | if (*p == '.') | |
2543 | *p = '-'; | |
2544 | p++; | |
2545 | } | |
2546 | ||
2547 | return name; | |
2548 | } | |
2549 | ||
30b28db1 | 2550 | static struct value * |
fba45db2 | 2551 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2552 | { |
73a93a32 | 2553 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2554 | } |
2555 | ||
30b28db1 | 2556 | static struct value * |
fba45db2 | 2557 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2558 | { |
2559 | return cplus_value_of_child (parent, index); | |
2560 | } | |
2561 | ||
2562 | static struct type * | |
fba45db2 | 2563 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2564 | { |
2565 | return cplus_type_of_child (parent, index); | |
2566 | } | |
2567 | ||
2568 | static int | |
fba45db2 | 2569 | java_variable_editable (struct varobj *var) |
8b93c638 JM |
2570 | { |
2571 | return cplus_variable_editable (var); | |
2572 | } | |
2573 | ||
2574 | static char * | |
fba45db2 | 2575 | java_value_of_variable (struct varobj *var) |
8b93c638 JM |
2576 | { |
2577 | return cplus_value_of_variable (var); | |
2578 | } | |
2579 | \f | |
2580 | extern void _initialize_varobj (void); | |
2581 | void | |
2582 | _initialize_varobj (void) | |
2583 | { | |
2584 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2585 | ||
2586 | varobj_table = xmalloc (sizeof_table); | |
2587 | memset (varobj_table, 0, sizeof_table); | |
2588 | ||
85c07804 AC |
2589 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2590 | &varobjdebug, _("\ | |
2591 | Set varobj debugging."), _("\ | |
2592 | Show varobj debugging."), _("\ | |
2593 | When non-zero, varobj debugging is enabled."), | |
2594 | NULL, | |
920d2a44 | 2595 | show_varobjdebug, |
85c07804 | 2596 | &setlist, &showlist); |
8b93c638 | 2597 | } |
8756216b DP |
2598 | |
2599 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2600 | are defined on globals. | |
2601 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2602 | void | |
2603 | varobj_invalidate (void) | |
2604 | { | |
2605 | struct varobj **all_rootvarobj; | |
2606 | struct varobj **varp; | |
2607 | ||
2608 | if (varobj_list (&all_rootvarobj) > 0) | |
2609 | { | |
2610 | varp = all_rootvarobj; | |
2611 | while (*varp != NULL) | |
2612 | { | |
2613 | /* global var must be re-evaluated. */ | |
2614 | if ((*varp)->root->valid_block == NULL) | |
2615 | { | |
2616 | struct varobj *tmp_var; | |
2617 | ||
2618 | /* Try to create a varobj with same expression. If we succeed replace | |
2619 | the old varobj, otherwise invalidate it. */ | |
2620 | tmp_var = varobj_create (NULL, (*varp)->name, (CORE_ADDR) 0, USE_CURRENT_FRAME); | |
2621 | if (tmp_var != NULL) | |
2622 | { | |
2623 | tmp_var->obj_name = xstrdup ((*varp)->obj_name); | |
2624 | varobj_delete (*varp, NULL, 0); | |
2625 | install_variable (tmp_var); | |
2626 | } | |
2627 | else | |
2628 | (*varp)->root->is_valid = 0; | |
2629 | } | |
2630 | else /* locals must be invalidated. */ | |
2631 | (*varp)->root->is_valid = 0; | |
2632 | ||
2633 | varp++; | |
2634 | } | |
2635 | xfree (all_rootvarobj); | |
2636 | } | |
2637 | return; | |
2638 | } |