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 | |
8 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
17 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
18 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
19 | Boston, MA 02110-1301, USA. */ | |
8b93c638 JM |
20 | |
21 | #include "defs.h" | |
a6c442d8 | 22 | #include "exceptions.h" |
8b93c638 JM |
23 | #include "value.h" |
24 | #include "expression.h" | |
25 | #include "frame.h" | |
8b93c638 JM |
26 | #include "language.h" |
27 | #include "wrapper.h" | |
28 | #include "gdbcmd.h" | |
d2353924 | 29 | #include "block.h" |
a6c442d8 MK |
30 | |
31 | #include "gdb_assert.h" | |
b66d6d2e | 32 | #include "gdb_string.h" |
8b93c638 JM |
33 | |
34 | #include "varobj.h" | |
28335dcc | 35 | #include "vec.h" |
8b93c638 JM |
36 | |
37 | /* Non-zero if we want to see trace of varobj level stuff. */ | |
38 | ||
39 | int varobjdebug = 0; | |
920d2a44 AC |
40 | static void |
41 | show_varobjdebug (struct ui_file *file, int from_tty, | |
42 | struct cmd_list_element *c, const char *value) | |
43 | { | |
44 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
45 | } | |
8b93c638 JM |
46 | |
47 | /* String representations of gdb's format codes */ | |
48 | char *varobj_format_string[] = | |
72330bd6 | 49 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
50 | |
51 | /* String representations of gdb's known languages */ | |
72330bd6 | 52 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
53 | |
54 | /* Data structures */ | |
55 | ||
56 | /* Every root variable has one of these structures saved in its | |
57 | varobj. Members which must be free'd are noted. */ | |
58 | struct varobj_root | |
72330bd6 | 59 | { |
8b93c638 | 60 | |
72330bd6 AC |
61 | /* Alloc'd expression for this parent. */ |
62 | struct expression *exp; | |
8b93c638 | 63 | |
72330bd6 AC |
64 | /* Block for which this expression is valid */ |
65 | struct block *valid_block; | |
8b93c638 | 66 | |
72330bd6 | 67 | /* The frame for this expression */ |
e64d9b3d | 68 | struct frame_id frame; |
8b93c638 | 69 | |
72330bd6 AC |
70 | /* If 1, "update" always recomputes the frame & valid block |
71 | using the currently selected frame. */ | |
72 | int use_selected_frame; | |
73a93a32 | 73 | |
8756216b DP |
74 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
75 | to symbols that do not exist anymore. */ | |
76 | int is_valid; | |
77 | ||
72330bd6 AC |
78 | /* Language info for this variable and its children */ |
79 | struct language_specific *lang; | |
8b93c638 | 80 | |
72330bd6 AC |
81 | /* The varobj for this root node. */ |
82 | struct varobj *rootvar; | |
8b93c638 | 83 | |
72330bd6 AC |
84 | /* Next root variable */ |
85 | struct varobj_root *next; | |
86 | }; | |
8b93c638 | 87 | |
28335dcc VP |
88 | typedef struct varobj *varobj_p; |
89 | ||
90 | DEF_VEC_P (varobj_p); | |
91 | ||
8b93c638 JM |
92 | /* Every variable in the system has a structure of this type defined |
93 | for it. This structure holds all information necessary to manipulate | |
94 | a particular object variable. Members which must be freed are noted. */ | |
95 | struct varobj | |
72330bd6 | 96 | { |
8b93c638 | 97 | |
72330bd6 AC |
98 | /* Alloc'd name of the variable for this object.. If this variable is a |
99 | child, then this name will be the child's source name. | |
100 | (bar, not foo.bar) */ | |
101 | /* NOTE: This is the "expression" */ | |
102 | char *name; | |
8b93c638 | 103 | |
72330bd6 AC |
104 | /* The alloc'd name for this variable's object. This is here for |
105 | convenience when constructing this object's children. */ | |
106 | char *obj_name; | |
8b93c638 | 107 | |
72330bd6 AC |
108 | /* Index of this variable in its parent or -1 */ |
109 | int index; | |
8b93c638 | 110 | |
72330bd6 AC |
111 | /* The type of this variable. This may NEVER be NULL. */ |
112 | struct type *type; | |
8b93c638 | 113 | |
b20d8971 VP |
114 | /* The value of this expression or subexpression. A NULL value |
115 | indicates there was an error getting this value. | |
b2c2bd75 VP |
116 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
117 | the value is either NULL, or not lazy. */ | |
30b28db1 | 118 | struct value *value; |
8b93c638 | 119 | |
72330bd6 AC |
120 | /* The number of (immediate) children this variable has */ |
121 | int num_children; | |
8b93c638 | 122 | |
72330bd6 AC |
123 | /* If this object is a child, this points to its immediate parent. */ |
124 | struct varobj *parent; | |
8b93c638 | 125 | |
28335dcc VP |
126 | /* Children of this object. */ |
127 | VEC (varobj_p) *children; | |
8b93c638 | 128 | |
72330bd6 AC |
129 | /* Description of the root variable. Points to root variable for children. */ |
130 | struct varobj_root *root; | |
8b93c638 | 131 | |
72330bd6 AC |
132 | /* The format of the output for this object */ |
133 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
134 | |
135 | /* Was this variable updated via a varobj_set_value operation */ | |
136 | int updated; | |
85265413 NR |
137 | |
138 | /* Last print value. */ | |
139 | char *print_value; | |
72330bd6 | 140 | }; |
8b93c638 | 141 | |
8b93c638 | 142 | struct cpstack |
72330bd6 AC |
143 | { |
144 | char *name; | |
145 | struct cpstack *next; | |
146 | }; | |
8b93c638 JM |
147 | |
148 | /* A list of varobjs */ | |
149 | ||
150 | struct vlist | |
72330bd6 AC |
151 | { |
152 | struct varobj *var; | |
153 | struct vlist *next; | |
154 | }; | |
8b93c638 JM |
155 | |
156 | /* Private function prototypes */ | |
157 | ||
158 | /* Helper functions for the above subcommands. */ | |
159 | ||
a14ed312 | 160 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 161 | |
a14ed312 KB |
162 | static void delete_variable_1 (struct cpstack **, int *, |
163 | struct varobj *, int, int); | |
8b93c638 | 164 | |
a14ed312 | 165 | static int install_variable (struct varobj *); |
8b93c638 | 166 | |
a14ed312 | 167 | static void uninstall_variable (struct varobj *); |
8b93c638 | 168 | |
a14ed312 | 169 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 170 | |
8b93c638 JM |
171 | /* Utility routines */ |
172 | ||
a14ed312 | 173 | static struct varobj *new_variable (void); |
8b93c638 | 174 | |
a14ed312 | 175 | static struct varobj *new_root_variable (void); |
8b93c638 | 176 | |
a14ed312 | 177 | static void free_variable (struct varobj *var); |
8b93c638 | 178 | |
74b7792f AC |
179 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
180 | ||
a14ed312 | 181 | static struct type *get_type (struct varobj *var); |
8b93c638 | 182 | |
6e2a9270 VP |
183 | static struct type *get_value_type (struct varobj *var); |
184 | ||
a14ed312 | 185 | static struct type *get_target_type (struct type *); |
8b93c638 | 186 | |
a14ed312 | 187 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 188 | |
a14ed312 | 189 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 190 | |
a14ed312 | 191 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 192 | |
acd65feb VP |
193 | static int install_new_value (struct varobj *var, struct value *value, |
194 | int initial); | |
195 | ||
8b93c638 JM |
196 | /* Language-specific routines. */ |
197 | ||
a14ed312 | 198 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 199 | |
a14ed312 | 200 | static int number_of_children (struct varobj *); |
8b93c638 | 201 | |
a14ed312 | 202 | static char *name_of_variable (struct varobj *); |
8b93c638 | 203 | |
a14ed312 | 204 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 205 | |
30b28db1 | 206 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 207 | |
30b28db1 | 208 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 209 | |
a14ed312 | 210 | static int variable_editable (struct varobj *var); |
8b93c638 | 211 | |
a14ed312 | 212 | static char *my_value_of_variable (struct varobj *var); |
8b93c638 | 213 | |
85265413 NR |
214 | static char *value_get_print_value (struct value *value, |
215 | enum varobj_display_formats format); | |
216 | ||
b2c2bd75 VP |
217 | static int varobj_value_is_changeable_p (struct varobj *var); |
218 | ||
219 | static int is_root_p (struct varobj *var); | |
8b93c638 JM |
220 | |
221 | /* C implementation */ | |
222 | ||
a14ed312 | 223 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 224 | |
a14ed312 | 225 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 226 | |
a14ed312 | 227 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 228 | |
30b28db1 | 229 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 230 | |
30b28db1 | 231 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 232 | |
a14ed312 | 233 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 234 | |
a14ed312 | 235 | static int c_variable_editable (struct varobj *var); |
8b93c638 | 236 | |
a14ed312 | 237 | static char *c_value_of_variable (struct varobj *var); |
8b93c638 JM |
238 | |
239 | /* C++ implementation */ | |
240 | ||
a14ed312 | 241 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 242 | |
a14ed312 | 243 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 244 | |
a14ed312 | 245 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 246 | |
a14ed312 | 247 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 248 | |
30b28db1 | 249 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 250 | |
30b28db1 | 251 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 252 | |
a14ed312 | 253 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 254 | |
a14ed312 | 255 | static int cplus_variable_editable (struct varobj *var); |
8b93c638 | 256 | |
a14ed312 | 257 | static char *cplus_value_of_variable (struct varobj *var); |
8b93c638 JM |
258 | |
259 | /* Java implementation */ | |
260 | ||
a14ed312 | 261 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 262 | |
a14ed312 | 263 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 264 | |
a14ed312 | 265 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 266 | |
30b28db1 | 267 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 268 | |
30b28db1 | 269 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 270 | |
a14ed312 | 271 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 272 | |
a14ed312 | 273 | static int java_variable_editable (struct varobj *var); |
8b93c638 | 274 | |
a14ed312 | 275 | static char *java_value_of_variable (struct varobj *var); |
8b93c638 JM |
276 | |
277 | /* The language specific vector */ | |
278 | ||
279 | struct language_specific | |
72330bd6 | 280 | { |
8b93c638 | 281 | |
72330bd6 AC |
282 | /* The language of this variable */ |
283 | enum varobj_languages language; | |
8b93c638 | 284 | |
72330bd6 AC |
285 | /* The number of children of PARENT. */ |
286 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 287 | |
72330bd6 AC |
288 | /* The name (expression) of a root varobj. */ |
289 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 290 | |
72330bd6 AC |
291 | /* The name of the INDEX'th child of PARENT. */ |
292 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 293 | |
30b28db1 AC |
294 | /* The ``struct value *'' of the root variable ROOT. */ |
295 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 296 | |
30b28db1 AC |
297 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
298 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 299 | |
72330bd6 AC |
300 | /* The type of the INDEX'th child of PARENT. */ |
301 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 302 | |
72330bd6 AC |
303 | /* Is VAR editable? */ |
304 | int (*variable_editable) (struct varobj * var); | |
8b93c638 | 305 | |
72330bd6 AC |
306 | /* The current value of VAR. */ |
307 | char *(*value_of_variable) (struct varobj * var); | |
308 | }; | |
8b93c638 JM |
309 | |
310 | /* Array of known source language routines. */ | |
d5d6fca5 | 311 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
312 | /* Unknown (try treating as C */ |
313 | { | |
72330bd6 AC |
314 | vlang_unknown, |
315 | c_number_of_children, | |
316 | c_name_of_variable, | |
317 | c_name_of_child, | |
318 | c_value_of_root, | |
319 | c_value_of_child, | |
320 | c_type_of_child, | |
321 | c_variable_editable, | |
322 | c_value_of_variable} | |
8b93c638 JM |
323 | , |
324 | /* C */ | |
325 | { | |
72330bd6 AC |
326 | vlang_c, |
327 | c_number_of_children, | |
328 | c_name_of_variable, | |
329 | c_name_of_child, | |
330 | c_value_of_root, | |
331 | c_value_of_child, | |
332 | c_type_of_child, | |
333 | c_variable_editable, | |
334 | c_value_of_variable} | |
8b93c638 JM |
335 | , |
336 | /* C++ */ | |
337 | { | |
72330bd6 AC |
338 | vlang_cplus, |
339 | cplus_number_of_children, | |
340 | cplus_name_of_variable, | |
341 | cplus_name_of_child, | |
342 | cplus_value_of_root, | |
343 | cplus_value_of_child, | |
344 | cplus_type_of_child, | |
345 | cplus_variable_editable, | |
346 | cplus_value_of_variable} | |
8b93c638 JM |
347 | , |
348 | /* Java */ | |
349 | { | |
72330bd6 AC |
350 | vlang_java, |
351 | java_number_of_children, | |
352 | java_name_of_variable, | |
353 | java_name_of_child, | |
354 | java_value_of_root, | |
355 | java_value_of_child, | |
356 | java_type_of_child, | |
357 | java_variable_editable, | |
358 | java_value_of_variable} | |
8b93c638 JM |
359 | }; |
360 | ||
361 | /* A little convenience enum for dealing with C++/Java */ | |
362 | enum vsections | |
72330bd6 AC |
363 | { |
364 | v_public = 0, v_private, v_protected | |
365 | }; | |
8b93c638 JM |
366 | |
367 | /* Private data */ | |
368 | ||
369 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 370 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
371 | |
372 | /* Header of the list of root variable objects */ | |
373 | static struct varobj_root *rootlist; | |
374 | static int rootcount = 0; /* number of root varobjs in the list */ | |
375 | ||
376 | /* Prime number indicating the number of buckets in the hash table */ | |
377 | /* A prime large enough to avoid too many colisions */ | |
378 | #define VAROBJ_TABLE_SIZE 227 | |
379 | ||
380 | /* Pointer to the varobj hash table (built at run time) */ | |
381 | static struct vlist **varobj_table; | |
382 | ||
8b93c638 JM |
383 | /* Is the variable X one of our "fake" children? */ |
384 | #define CPLUS_FAKE_CHILD(x) \ | |
385 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
386 | \f | |
387 | ||
388 | /* API Implementation */ | |
b2c2bd75 VP |
389 | static int |
390 | is_root_p (struct varobj *var) | |
391 | { | |
392 | return (var->root->rootvar == var); | |
393 | } | |
8b93c638 JM |
394 | |
395 | /* Creates a varobj (not its children) */ | |
396 | ||
7d8547c9 AC |
397 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
398 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
399 | ||
400 | static struct frame_info * | |
401 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
402 | { | |
403 | struct frame_info *frame = NULL; | |
404 | ||
405 | if (frame_addr == (CORE_ADDR) 0) | |
406 | return NULL; | |
407 | ||
408 | while (1) | |
409 | { | |
410 | frame = get_prev_frame (frame); | |
411 | if (frame == NULL) | |
412 | return NULL; | |
eb5492fa | 413 | if (get_frame_base_address (frame) == frame_addr) |
7d8547c9 AC |
414 | return frame; |
415 | } | |
416 | } | |
417 | ||
8b93c638 JM |
418 | struct varobj * |
419 | varobj_create (char *objname, | |
72330bd6 | 420 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
421 | { |
422 | struct varobj *var; | |
2c67cb8b AC |
423 | struct frame_info *fi; |
424 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
425 | struct block *block; |
426 | struct cleanup *old_chain; | |
427 | ||
428 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
429 | var = new_root_variable (); | |
74b7792f | 430 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
431 | |
432 | if (expression != NULL) | |
433 | { | |
434 | char *p; | |
435 | enum varobj_languages lang; | |
acd65feb | 436 | struct value *value; |
8b93c638 JM |
437 | |
438 | /* Parse and evaluate the expression, filling in as much | |
439 | of the variable's data as possible */ | |
440 | ||
441 | /* Allow creator to specify context of variable */ | |
72330bd6 | 442 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
206415a3 | 443 | fi = deprecated_safe_get_selected_frame (); |
8b93c638 | 444 | else |
7d8547c9 AC |
445 | /* FIXME: cagney/2002-11-23: This code should be doing a |
446 | lookup using the frame ID and not just the frame's | |
447 | ``address''. This, of course, means an interface change. | |
448 | However, with out that interface change ISAs, such as the | |
449 | ia64 with its two stacks, won't work. Similar goes for the | |
450 | case where there is a frameless function. */ | |
8b93c638 JM |
451 | fi = find_frame_addr_in_frame_chain (frame); |
452 | ||
73a93a32 JI |
453 | /* frame = -2 means always use selected frame */ |
454 | if (type == USE_SELECTED_FRAME) | |
455 | var->root->use_selected_frame = 1; | |
456 | ||
8b93c638 JM |
457 | block = NULL; |
458 | if (fi != NULL) | |
ae767bfb | 459 | block = get_frame_block (fi, 0); |
8b93c638 JM |
460 | |
461 | p = expression; | |
462 | innermost_block = NULL; | |
73a93a32 JI |
463 | /* Wrap the call to parse expression, so we can |
464 | return a sensible error. */ | |
465 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
466 | { | |
467 | return NULL; | |
468 | } | |
8b93c638 JM |
469 | |
470 | /* Don't allow variables to be created for types. */ | |
471 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
472 | { | |
473 | do_cleanups (old_chain); | |
bc8332bb AC |
474 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
475 | " as an expression.\n"); | |
8b93c638 JM |
476 | return NULL; |
477 | } | |
478 | ||
479 | var->format = variable_default_display (var); | |
480 | var->root->valid_block = innermost_block; | |
481 | var->name = savestring (expression, strlen (expression)); | |
482 | ||
483 | /* When the frame is different from the current frame, | |
484 | we must select the appropriate frame before parsing | |
485 | the expression, otherwise the value will not be current. | |
486 | Since select_frame is so benign, just call it for all cases. */ | |
487 | if (fi != NULL) | |
488 | { | |
7a424e99 | 489 | var->root->frame = get_frame_id (fi); |
206415a3 | 490 | old_fi = get_selected_frame (NULL); |
0f7d239c | 491 | select_frame (fi); |
8b93c638 JM |
492 | } |
493 | ||
494 | /* We definitively need to catch errors here. | |
495 | If evaluate_expression succeeds we got the value we wanted. | |
496 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb VP |
497 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
498 | /* Error getting the value. Try to at least get the | |
499 | right type. */ | |
500 | value = evaluate_type (var->root->exp); | |
501 | ||
acd65feb | 502 | var->type = value_type (value); |
acd65feb | 503 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
504 | |
505 | /* Set language info */ | |
506 | lang = variable_language (var); | |
d5d6fca5 | 507 | var->root->lang = &languages[lang]; |
8b93c638 JM |
508 | |
509 | /* Set ourselves as our root */ | |
510 | var->root->rootvar = var; | |
511 | ||
512 | /* Reset the selected frame */ | |
513 | if (fi != NULL) | |
0f7d239c | 514 | select_frame (old_fi); |
8b93c638 JM |
515 | } |
516 | ||
73a93a32 JI |
517 | /* If the variable object name is null, that means this |
518 | is a temporary variable, so don't install it. */ | |
519 | ||
520 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 JM |
521 | { |
522 | var->obj_name = savestring (objname, strlen (objname)); | |
523 | ||
524 | /* If a varobj name is duplicated, the install will fail so | |
525 | we must clenup */ | |
526 | if (!install_variable (var)) | |
527 | { | |
528 | do_cleanups (old_chain); | |
529 | return NULL; | |
530 | } | |
531 | } | |
532 | ||
533 | discard_cleanups (old_chain); | |
534 | return var; | |
535 | } | |
536 | ||
537 | /* Generates an unique name that can be used for a varobj */ | |
538 | ||
539 | char * | |
540 | varobj_gen_name (void) | |
541 | { | |
542 | static int id = 0; | |
e64d9b3d | 543 | char *obj_name; |
8b93c638 JM |
544 | |
545 | /* generate a name for this object */ | |
546 | id++; | |
b435e160 | 547 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 548 | |
e64d9b3d | 549 | return obj_name; |
8b93c638 JM |
550 | } |
551 | ||
552 | /* Given an "objname", returns the pointer to the corresponding varobj | |
553 | or NULL if not found */ | |
554 | ||
555 | struct varobj * | |
556 | varobj_get_handle (char *objname) | |
557 | { | |
558 | struct vlist *cv; | |
559 | const char *chp; | |
560 | unsigned int index = 0; | |
561 | unsigned int i = 1; | |
562 | ||
563 | for (chp = objname; *chp; chp++) | |
564 | { | |
565 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
566 | } | |
567 | ||
568 | cv = *(varobj_table + index); | |
569 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
570 | cv = cv->next; | |
571 | ||
572 | if (cv == NULL) | |
8a3fe4f8 | 573 | error (_("Variable object not found")); |
8b93c638 JM |
574 | |
575 | return cv->var; | |
576 | } | |
577 | ||
578 | /* Given the handle, return the name of the object */ | |
579 | ||
580 | char * | |
581 | varobj_get_objname (struct varobj *var) | |
582 | { | |
583 | return var->obj_name; | |
584 | } | |
585 | ||
586 | /* Given the handle, return the expression represented by the object */ | |
587 | ||
588 | char * | |
589 | varobj_get_expression (struct varobj *var) | |
590 | { | |
591 | return name_of_variable (var); | |
592 | } | |
593 | ||
594 | /* Deletes a varobj and all its children if only_children == 0, | |
595 | otherwise deletes only the children; returns a malloc'ed list of all the | |
596 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
597 | ||
598 | int | |
599 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
600 | { | |
601 | int delcount; | |
602 | int mycount; | |
603 | struct cpstack *result = NULL; | |
604 | char **cp; | |
605 | ||
606 | /* Initialize a stack for temporary results */ | |
607 | cppush (&result, NULL); | |
608 | ||
609 | if (only_children) | |
610 | /* Delete only the variable children */ | |
611 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
612 | else | |
613 | /* Delete the variable and all its children */ | |
614 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
615 | ||
616 | /* We may have been asked to return a list of what has been deleted */ | |
617 | if (dellist != NULL) | |
618 | { | |
619 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
620 | ||
621 | cp = *dellist; | |
622 | mycount = delcount; | |
623 | *cp = cppop (&result); | |
624 | while ((*cp != NULL) && (mycount > 0)) | |
625 | { | |
626 | mycount--; | |
627 | cp++; | |
628 | *cp = cppop (&result); | |
629 | } | |
630 | ||
631 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 632 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 633 | mycount); |
8b93c638 JM |
634 | } |
635 | ||
636 | return delcount; | |
637 | } | |
638 | ||
639 | /* Set/Get variable object display format */ | |
640 | ||
641 | enum varobj_display_formats | |
642 | varobj_set_display_format (struct varobj *var, | |
643 | enum varobj_display_formats format) | |
644 | { | |
645 | switch (format) | |
646 | { | |
647 | case FORMAT_NATURAL: | |
648 | case FORMAT_BINARY: | |
649 | case FORMAT_DECIMAL: | |
650 | case FORMAT_HEXADECIMAL: | |
651 | case FORMAT_OCTAL: | |
652 | var->format = format; | |
653 | break; | |
654 | ||
655 | default: | |
656 | var->format = variable_default_display (var); | |
657 | } | |
658 | ||
659 | return var->format; | |
660 | } | |
661 | ||
662 | enum varobj_display_formats | |
663 | varobj_get_display_format (struct varobj *var) | |
664 | { | |
665 | return var->format; | |
666 | } | |
667 | ||
668 | int | |
669 | varobj_get_num_children (struct varobj *var) | |
670 | { | |
671 | if (var->num_children == -1) | |
672 | var->num_children = number_of_children (var); | |
673 | ||
674 | return var->num_children; | |
675 | } | |
676 | ||
677 | /* Creates a list of the immediate children of a variable object; | |
678 | the return code is the number of such children or -1 on error */ | |
679 | ||
680 | int | |
681 | varobj_list_children (struct varobj *var, struct varobj ***childlist) | |
682 | { | |
683 | struct varobj *child; | |
684 | char *name; | |
685 | int i; | |
686 | ||
687 | /* sanity check: have we been passed a pointer? */ | |
688 | if (childlist == NULL) | |
689 | return -1; | |
690 | ||
691 | *childlist = NULL; | |
692 | ||
693 | if (var->num_children == -1) | |
694 | var->num_children = number_of_children (var); | |
695 | ||
74a44383 DJ |
696 | /* If that failed, give up. */ |
697 | if (var->num_children == -1) | |
698 | return -1; | |
699 | ||
28335dcc VP |
700 | /* If we're called when the list of children is not yet initialized, |
701 | allocate enough elements in it. */ | |
702 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
703 | VEC_safe_push (varobj_p, var->children, NULL); | |
704 | ||
8b93c638 JM |
705 | /* List of children */ |
706 | *childlist = xmalloc ((var->num_children + 1) * sizeof (struct varobj *)); | |
707 | ||
708 | for (i = 0; i < var->num_children; i++) | |
709 | { | |
28335dcc VP |
710 | varobj_p existing; |
711 | ||
8b93c638 JM |
712 | /* Mark as the end in case we bail out */ |
713 | *((*childlist) + i) = NULL; | |
714 | ||
28335dcc VP |
715 | existing = VEC_index (varobj_p, var->children, i); |
716 | ||
717 | if (existing == NULL) | |
718 | { | |
719 | /* Either it's the first call to varobj_list_children for | |
720 | this variable object, and the child was never created, | |
721 | or it was explicitly deleted by the client. */ | |
722 | name = name_of_child (var, i); | |
723 | existing = create_child (var, i, name); | |
724 | VEC_replace (varobj_p, var->children, i, existing); | |
725 | } | |
8b93c638 | 726 | |
28335dcc | 727 | *((*childlist) + i) = existing; |
8b93c638 JM |
728 | } |
729 | ||
730 | /* End of list is marked by a NULL pointer */ | |
731 | *((*childlist) + i) = NULL; | |
732 | ||
733 | return var->num_children; | |
734 | } | |
735 | ||
736 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
737 | prints on the console */ | |
738 | ||
739 | char * | |
740 | varobj_get_type (struct varobj *var) | |
741 | { | |
30b28db1 | 742 | struct value *val; |
8b93c638 JM |
743 | struct cleanup *old_chain; |
744 | struct ui_file *stb; | |
745 | char *thetype; | |
746 | long length; | |
747 | ||
748 | /* For the "fake" variables, do not return a type. (It's type is | |
8756216b DP |
749 | NULL, too.) |
750 | Do not return a type for invalid variables as well. */ | |
751 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) | |
8b93c638 JM |
752 | return NULL; |
753 | ||
754 | stb = mem_fileopen (); | |
755 | old_chain = make_cleanup_ui_file_delete (stb); | |
756 | ||
30b28db1 | 757 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
758 | cast it to our type. We then typeprint this variable. */ |
759 | val = value_zero (var->type, not_lval); | |
df407dfe | 760 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
761 | |
762 | thetype = ui_file_xstrdup (stb, &length); | |
763 | do_cleanups (old_chain); | |
764 | return thetype; | |
765 | } | |
766 | ||
1ecb4ee0 DJ |
767 | /* Obtain the type of an object variable. */ |
768 | ||
769 | struct type * | |
770 | varobj_get_gdb_type (struct varobj *var) | |
771 | { | |
772 | return var->type; | |
773 | } | |
774 | ||
8b93c638 JM |
775 | enum varobj_languages |
776 | varobj_get_language (struct varobj *var) | |
777 | { | |
778 | return variable_language (var); | |
779 | } | |
780 | ||
781 | int | |
782 | varobj_get_attributes (struct varobj *var) | |
783 | { | |
784 | int attributes = 0; | |
785 | ||
8756216b | 786 | if (var->root->is_valid && variable_editable (var)) |
8b93c638 JM |
787 | /* FIXME: define masks for attributes */ |
788 | attributes |= 0x00000001; /* Editable */ | |
789 | ||
790 | return attributes; | |
791 | } | |
792 | ||
793 | char * | |
794 | varobj_get_value (struct varobj *var) | |
795 | { | |
796 | return my_value_of_variable (var); | |
797 | } | |
798 | ||
799 | /* Set the value of an object variable (if it is editable) to the | |
800 | value of the given expression */ | |
801 | /* Note: Invokes functions that can call error() */ | |
802 | ||
803 | int | |
804 | varobj_set_value (struct varobj *var, char *expression) | |
805 | { | |
30b28db1 | 806 | struct value *val; |
8b93c638 | 807 | int offset = 0; |
a6c442d8 | 808 | int error = 0; |
8b93c638 JM |
809 | |
810 | /* The argument "expression" contains the variable's new value. | |
811 | We need to first construct a legal expression for this -- ugh! */ | |
812 | /* Does this cover all the bases? */ | |
813 | struct expression *exp; | |
30b28db1 | 814 | struct value *value; |
8b93c638 JM |
815 | int saved_input_radix = input_radix; |
816 | ||
b20d8971 | 817 | if (var->value != NULL && variable_editable (var)) |
8b93c638 JM |
818 | { |
819 | char *s = expression; | |
820 | int i; | |
8b93c638 JM |
821 | |
822 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ | |
7a24eb7c | 823 | exp = parse_exp_1 (&s, 0, 0); |
8b93c638 JM |
824 | if (!gdb_evaluate_expression (exp, &value)) |
825 | { | |
826 | /* We cannot proceed without a valid expression. */ | |
8038e1e2 | 827 | xfree (exp); |
8b93c638 JM |
828 | return 0; |
829 | } | |
830 | ||
acd65feb | 831 | /* All types that are editable must also be changeable. */ |
b2c2bd75 | 832 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb VP |
833 | |
834 | /* The value of a changeable variable object must not be lazy. */ | |
835 | gdb_assert (!value_lazy (var->value)); | |
836 | ||
837 | /* Need to coerce the input. We want to check if the | |
838 | value of the variable object will be different | |
839 | after assignment, and the first thing value_assign | |
840 | does is coerce the input. | |
841 | For example, if we are assigning an array to a pointer variable we | |
842 | should compare the pointer with the the array's address, not with the | |
843 | array's content. */ | |
844 | value = coerce_array (value); | |
845 | ||
acd65feb VP |
846 | /* The new value may be lazy. gdb_value_assign, or |
847 | rather value_contents, will take care of this. | |
848 | If fetching of the new value will fail, gdb_value_assign | |
849 | with catch the exception. */ | |
575bbeb6 | 850 | if (!gdb_value_assign (var->value, value, &val)) |
8a1a0112 | 851 | return 0; |
b26ed50d | 852 | |
ae097835 VP |
853 | /* If the value has changed, record it, so that next -var-update can |
854 | report this change. If a variable had a value of '1', we've set it | |
855 | to '333' and then set again to '1', when -var-update will report this | |
856 | variable as changed -- because the first assignment has set the | |
857 | 'updated' flag. There's no need to optimize that, because return value | |
858 | of -var-update should be considered an approximation. */ | |
859 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
8b93c638 JM |
860 | input_radix = saved_input_radix; |
861 | return 1; | |
862 | } | |
863 | ||
864 | return 0; | |
865 | } | |
866 | ||
867 | /* Returns a malloc'ed list with all root variable objects */ | |
868 | int | |
869 | varobj_list (struct varobj ***varlist) | |
870 | { | |
871 | struct varobj **cv; | |
872 | struct varobj_root *croot; | |
873 | int mycount = rootcount; | |
874 | ||
875 | /* Alloc (rootcount + 1) entries for the result */ | |
876 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
877 | ||
878 | cv = *varlist; | |
879 | croot = rootlist; | |
880 | while ((croot != NULL) && (mycount > 0)) | |
881 | { | |
882 | *cv = croot->rootvar; | |
883 | mycount--; | |
884 | cv++; | |
885 | croot = croot->next; | |
886 | } | |
887 | /* Mark the end of the list */ | |
888 | *cv = NULL; | |
889 | ||
890 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
891 | warning |
892 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
893 | rootcount, mycount); | |
8b93c638 JM |
894 | |
895 | return rootcount; | |
896 | } | |
897 | ||
acd65feb VP |
898 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
899 | this is the first assignement after the variable object was just | |
900 | created, or changed type. In that case, just assign the value | |
901 | and return 0. | |
902 | Otherwise, assign the value and if type_changeable returns non-zero, | |
903 | find if the new value is different from the current value. | |
b26ed50d VP |
904 | Return 1 if so, and 0 if the values are equal. |
905 | ||
906 | The VALUE parameter should not be released -- the function will | |
907 | take care of releasing it when needed. */ | |
acd65feb VP |
908 | static int |
909 | install_new_value (struct varobj *var, struct value *value, int initial) | |
910 | { | |
911 | int changeable; | |
912 | int need_to_fetch; | |
913 | int changed = 0; | |
914 | ||
acd65feb VP |
915 | /* We need to know the varobj's type to decide if the value should |
916 | be fetched or not. C++ fake children (public/protected/private) don't have | |
917 | a type. */ | |
918 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 919 | changeable = varobj_value_is_changeable_p (var); |
acd65feb VP |
920 | need_to_fetch = changeable; |
921 | ||
b26ed50d VP |
922 | /* We are not interested in the address of references, and given |
923 | that in C++ a reference is not rebindable, it cannot | |
924 | meaningfully change. So, get hold of the real value. */ | |
925 | if (value) | |
926 | { | |
927 | value = coerce_ref (value); | |
928 | release_value (value); | |
929 | } | |
930 | ||
acd65feb VP |
931 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
932 | /* For unions, we need to fetch the value implicitly because | |
933 | of implementation of union member fetch. When gdb | |
934 | creates a value for a field and the value of the enclosing | |
935 | structure is not lazy, it immediately copies the necessary | |
936 | bytes from the enclosing values. If the enclosing value is | |
937 | lazy, the call to value_fetch_lazy on the field will read | |
938 | the data from memory. For unions, that means we'll read the | |
939 | same memory more than once, which is not desirable. So | |
940 | fetch now. */ | |
941 | need_to_fetch = 1; | |
942 | ||
943 | /* The new value might be lazy. If the type is changeable, | |
944 | that is we'll be comparing values of this type, fetch the | |
945 | value now. Otherwise, on the next update the old value | |
946 | will be lazy, which means we've lost that old value. */ | |
947 | if (need_to_fetch && value && value_lazy (value)) | |
948 | { | |
949 | if (!gdb_value_fetch_lazy (value)) | |
950 | { | |
acd65feb VP |
951 | /* Set the value to NULL, so that for the next -var-update, |
952 | we don't try to compare the new value with this value, | |
953 | that we couldn't even read. */ | |
954 | value = NULL; | |
955 | } | |
acd65feb VP |
956 | } |
957 | ||
958 | /* If the type is changeable, compare the old and the new values. | |
959 | If this is the initial assignment, we don't have any old value | |
960 | to compare with. */ | |
7af9851d | 961 | if (initial && changeable) |
85265413 NR |
962 | var->print_value = value_get_print_value (value, var->format); |
963 | else if (changeable) | |
acd65feb VP |
964 | { |
965 | /* If the value of the varobj was changed by -var-set-value, then the | |
966 | value in the varobj and in the target is the same. However, that value | |
967 | is different from the value that the varobj had after the previous | |
57e66780 | 968 | -var-update. So need to the varobj as changed. */ |
acd65feb | 969 | if (var->updated) |
57e66780 DJ |
970 | { |
971 | xfree (var->print_value); | |
972 | var->print_value = value_get_print_value (value, var->format); | |
973 | changed = 1; | |
974 | } | |
acd65feb VP |
975 | else |
976 | { | |
977 | /* Try to compare the values. That requires that both | |
978 | values are non-lazy. */ | |
979 | ||
980 | /* Quick comparison of NULL values. */ | |
981 | if (var->value == NULL && value == NULL) | |
982 | /* Equal. */ | |
983 | ; | |
984 | else if (var->value == NULL || value == NULL) | |
57e66780 DJ |
985 | { |
986 | xfree (var->print_value); | |
987 | var->print_value = value_get_print_value (value, var->format); | |
988 | changed = 1; | |
989 | } | |
acd65feb VP |
990 | else |
991 | { | |
85265413 | 992 | char *print_value; |
acd65feb VP |
993 | gdb_assert (!value_lazy (var->value)); |
994 | gdb_assert (!value_lazy (value)); | |
85265413 NR |
995 | print_value = value_get_print_value (value, var->format); |
996 | ||
57e66780 | 997 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 NR |
998 | if (strcmp (var->print_value, print_value) != 0) |
999 | { | |
1000 | xfree (var->print_value); | |
1001 | var->print_value = print_value; | |
1002 | changed = 1; | |
1003 | } | |
1004 | else | |
1005 | xfree (print_value); | |
acd65feb VP |
1006 | } |
1007 | } | |
1008 | } | |
85265413 | 1009 | |
acd65feb VP |
1010 | /* We must always keep the new value, since children depend on it. */ |
1011 | if (var->value != NULL) | |
1012 | value_free (var->value); | |
1013 | var->value = value; | |
1014 | var->updated = 0; | |
85265413 | 1015 | |
b26ed50d | 1016 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1017 | |
1018 | return changed; | |
1019 | } | |
acd65feb | 1020 | |
8b93c638 JM |
1021 | /* Update the values for a variable and its children. This is a |
1022 | two-pronged attack. First, re-parse the value for the root's | |
1023 | expression to see if it's changed. Then go all the way | |
1024 | through its children, reconstructing them and noting if they've | |
1025 | changed. | |
8756216b DP |
1026 | Return value: |
1027 | < 0 for error values, see varobj.h. | |
1028 | Otherwise it is the number of children + parent changed. | |
8b93c638 | 1029 | |
705da579 KS |
1030 | Only root variables can be updated... |
1031 | ||
1032 | NOTE: This function may delete the caller's varobj. If it | |
8756216b DP |
1033 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
1034 | to point to the new varobj. */ | |
8b93c638 JM |
1035 | |
1036 | int | |
705da579 | 1037 | varobj_update (struct varobj **varp, struct varobj ***changelist) |
8b93c638 JM |
1038 | { |
1039 | int changed = 0; | |
73a93a32 | 1040 | int type_changed; |
8b93c638 JM |
1041 | int i; |
1042 | int vleft; | |
8b93c638 JM |
1043 | struct varobj *v; |
1044 | struct varobj **cv; | |
2c67cb8b | 1045 | struct varobj **templist = NULL; |
30b28db1 | 1046 | struct value *new; |
28335dcc VP |
1047 | VEC (varobj_p) *stack = NULL; |
1048 | VEC (varobj_p) *result = NULL; | |
e64d9b3d MH |
1049 | struct frame_id old_fid; |
1050 | struct frame_info *fi; | |
8b93c638 | 1051 | |
8756216b | 1052 | /* sanity check: have we been passed a pointer? */ |
a1f42e84 | 1053 | gdb_assert (changelist); |
8b93c638 | 1054 | |
b2c2bd75 | 1055 | if (!is_root_p (*varp)) |
a1f42e84 | 1056 | error (_("Only root variables can be updated")); |
8756216b DP |
1057 | |
1058 | if (!(*varp)->root->is_valid) | |
1059 | return INVALID; | |
8b93c638 JM |
1060 | |
1061 | /* Save the selected stack frame, since we will need to change it | |
8756216b | 1062 | in order to evaluate expressions. */ |
206415a3 | 1063 | old_fid = get_frame_id (deprecated_safe_get_selected_frame ()); |
8b93c638 JM |
1064 | |
1065 | /* Update the root variable. value_of_root can return NULL | |
1066 | if the variable is no longer around, i.e. we stepped out of | |
73a93a32 JI |
1067 | the frame in which a local existed. We are letting the |
1068 | value_of_root variable dispose of the varobj if the type | |
8756216b | 1069 | has changed. */ |
73a93a32 | 1070 | type_changed = 1; |
705da579 | 1071 | new = value_of_root (varp, &type_changed); |
0d2bd018 | 1072 | |
8756216b | 1073 | /* Restore selected frame. */ |
0d2bd018 NR |
1074 | fi = frame_find_by_id (old_fid); |
1075 | if (fi) | |
1076 | select_frame (fi); | |
1077 | ||
ae093f96 | 1078 | /* If this is a "use_selected_frame" varobj, and its type has changed, |
8756216b | 1079 | them note that it's changed. */ |
ae093f96 | 1080 | if (type_changed) |
28335dcc | 1081 | VEC_safe_push (varobj_p, result, *varp); |
acd65feb VP |
1082 | |
1083 | if (install_new_value ((*varp), new, type_changed)) | |
ae093f96 | 1084 | { |
acd65feb VP |
1085 | /* If type_changed is 1, install_new_value will never return |
1086 | non-zero, so we'll never report the same variable twice. */ | |
1087 | gdb_assert (!type_changed); | |
28335dcc | 1088 | VEC_safe_push (varobj_p, result, *varp); |
8b93c638 | 1089 | } |
8b93c638 | 1090 | |
b20d8971 VP |
1091 | if (new == NULL) |
1092 | { | |
1093 | /* This means the varobj itself is out of scope. | |
1094 | Report it. */ | |
1095 | VEC_free (varobj_p, result); | |
8756216b | 1096 | return NOT_IN_SCOPE; |
b20d8971 VP |
1097 | } |
1098 | ||
28335dcc | 1099 | VEC_safe_push (varobj_p, stack, *varp); |
8b93c638 | 1100 | |
8756216b | 1101 | /* Walk through the children, reconstructing them all. */ |
28335dcc | 1102 | while (!VEC_empty (varobj_p, stack)) |
8b93c638 | 1103 | { |
28335dcc VP |
1104 | v = VEC_pop (varobj_p, stack); |
1105 | ||
1106 | /* Push any children. Use reverse order so that the first | |
1107 | child is popped from the work stack first, and so | |
1108 | will be added to result first. This does not | |
1109 | affect correctness, just "nicer". */ | |
1110 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1111 | { |
28335dcc VP |
1112 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1113 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
1114 | if (c != NULL) | |
1115 | VEC_safe_push (varobj_p, stack, c); | |
8b93c638 JM |
1116 | } |
1117 | ||
28335dcc VP |
1118 | /* Update this variable, unless it's a root, which is already |
1119 | updated. */ | |
1120 | if (v != *varp) | |
1121 | { | |
1122 | new = value_of_child (v->parent, v->index); | |
1123 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1124 | { | |
1125 | /* Note that it's changed */ | |
1126 | VEC_safe_push (varobj_p, result, v); | |
1127 | v->updated = 0; | |
1128 | } | |
8b93c638 | 1129 | } |
8b93c638 JM |
1130 | } |
1131 | ||
8756216b | 1132 | /* Alloc (changed + 1) list entries. */ |
28335dcc | 1133 | changed = VEC_length (varobj_p, result); |
8b93c638 | 1134 | *changelist = xmalloc ((changed + 1) * sizeof (struct varobj *)); |
28335dcc | 1135 | cv = *changelist; |
8b93c638 | 1136 | |
28335dcc | 1137 | for (i = 0; i < changed; ++i) |
8b93c638 | 1138 | { |
28335dcc VP |
1139 | *cv = VEC_index (varobj_p, result, i); |
1140 | gdb_assert (*cv != NULL); | |
1141 | ++cv; | |
8b93c638 | 1142 | } |
28335dcc | 1143 | *cv = 0; |
8b93c638 | 1144 | |
93b979d6 NR |
1145 | VEC_free (varobj_p, stack); |
1146 | VEC_free (varobj_p, result); | |
1147 | ||
73a93a32 | 1148 | if (type_changed) |
8756216b | 1149 | return TYPE_CHANGED; |
73a93a32 JI |
1150 | else |
1151 | return changed; | |
8b93c638 JM |
1152 | } |
1153 | \f | |
1154 | ||
1155 | /* Helper functions */ | |
1156 | ||
1157 | /* | |
1158 | * Variable object construction/destruction | |
1159 | */ | |
1160 | ||
1161 | static int | |
fba45db2 KB |
1162 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1163 | int only_children_p) | |
8b93c638 JM |
1164 | { |
1165 | int delcount = 0; | |
1166 | ||
1167 | delete_variable_1 (resultp, &delcount, var, | |
1168 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1169 | ||
1170 | return delcount; | |
1171 | } | |
1172 | ||
1173 | /* Delete the variable object VAR and its children */ | |
1174 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1175 | and the parent is not removed we dump core. It must be always | |
1176 | initially called with remove_from_parent_p set */ | |
1177 | static void | |
72330bd6 AC |
1178 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1179 | struct varobj *var, int only_children_p, | |
1180 | int remove_from_parent_p) | |
8b93c638 | 1181 | { |
28335dcc | 1182 | int i; |
8b93c638 JM |
1183 | |
1184 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1185 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1186 | { | |
1187 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
8b93c638 | 1188 | if (!remove_from_parent_p) |
28335dcc VP |
1189 | child->parent = NULL; |
1190 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1191 | } |
28335dcc | 1192 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1193 | |
1194 | /* if we were called to delete only the children we are done here */ | |
1195 | if (only_children_p) | |
1196 | return; | |
1197 | ||
1198 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1199 | /* If the name is null, this is a temporary variable, that has not |
1200 | yet been installed, don't report it, it belongs to the caller... */ | |
1201 | if (var->obj_name != NULL) | |
8b93c638 | 1202 | { |
5b616ba1 | 1203 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1204 | *delcountp = *delcountp + 1; |
1205 | } | |
1206 | ||
1207 | /* If this variable has a parent, remove it from its parent's list */ | |
1208 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1209 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1210 | expensive list search to find the element to remove when we are | |
1211 | discarding the list afterwards */ | |
72330bd6 | 1212 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1213 | { |
28335dcc | 1214 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1215 | } |
72330bd6 | 1216 | |
73a93a32 JI |
1217 | if (var->obj_name != NULL) |
1218 | uninstall_variable (var); | |
8b93c638 JM |
1219 | |
1220 | /* Free memory associated with this variable */ | |
1221 | free_variable (var); | |
1222 | } | |
1223 | ||
1224 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1225 | static int | |
fba45db2 | 1226 | install_variable (struct varobj *var) |
8b93c638 JM |
1227 | { |
1228 | struct vlist *cv; | |
1229 | struct vlist *newvl; | |
1230 | const char *chp; | |
1231 | unsigned int index = 0; | |
1232 | unsigned int i = 1; | |
1233 | ||
1234 | for (chp = var->obj_name; *chp; chp++) | |
1235 | { | |
1236 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1237 | } | |
1238 | ||
1239 | cv = *(varobj_table + index); | |
1240 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1241 | cv = cv->next; | |
1242 | ||
1243 | if (cv != NULL) | |
8a3fe4f8 | 1244 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1245 | |
1246 | /* Add varobj to hash table */ | |
1247 | newvl = xmalloc (sizeof (struct vlist)); | |
1248 | newvl->next = *(varobj_table + index); | |
1249 | newvl->var = var; | |
1250 | *(varobj_table + index) = newvl; | |
1251 | ||
1252 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1253 | if (is_root_p (var)) |
8b93c638 JM |
1254 | { |
1255 | /* Add to list of root variables */ | |
1256 | if (rootlist == NULL) | |
1257 | var->root->next = NULL; | |
1258 | else | |
1259 | var->root->next = rootlist; | |
1260 | rootlist = var->root; | |
1261 | rootcount++; | |
1262 | } | |
1263 | ||
1264 | return 1; /* OK */ | |
1265 | } | |
1266 | ||
1267 | /* Unistall the object VAR. */ | |
1268 | static void | |
fba45db2 | 1269 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1270 | { |
1271 | struct vlist *cv; | |
1272 | struct vlist *prev; | |
1273 | struct varobj_root *cr; | |
1274 | struct varobj_root *prer; | |
1275 | const char *chp; | |
1276 | unsigned int index = 0; | |
1277 | unsigned int i = 1; | |
1278 | ||
1279 | /* Remove varobj from hash table */ | |
1280 | for (chp = var->obj_name; *chp; chp++) | |
1281 | { | |
1282 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1283 | } | |
1284 | ||
1285 | cv = *(varobj_table + index); | |
1286 | prev = NULL; | |
1287 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1288 | { | |
1289 | prev = cv; | |
1290 | cv = cv->next; | |
1291 | } | |
1292 | ||
1293 | if (varobjdebug) | |
1294 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1295 | ||
1296 | if (cv == NULL) | |
1297 | { | |
72330bd6 AC |
1298 | warning |
1299 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1300 | var->obj_name); | |
8b93c638 JM |
1301 | return; |
1302 | } | |
1303 | ||
1304 | if (prev == NULL) | |
1305 | *(varobj_table + index) = cv->next; | |
1306 | else | |
1307 | prev->next = cv->next; | |
1308 | ||
b8c9b27d | 1309 | xfree (cv); |
8b93c638 JM |
1310 | |
1311 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1312 | if (is_root_p (var)) |
8b93c638 JM |
1313 | { |
1314 | /* Remove from list of root variables */ | |
1315 | if (rootlist == var->root) | |
1316 | rootlist = var->root->next; | |
1317 | else | |
1318 | { | |
1319 | prer = NULL; | |
1320 | cr = rootlist; | |
1321 | while ((cr != NULL) && (cr->rootvar != var)) | |
1322 | { | |
1323 | prer = cr; | |
1324 | cr = cr->next; | |
1325 | } | |
1326 | if (cr == NULL) | |
1327 | { | |
72330bd6 AC |
1328 | warning |
1329 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1330 | var->obj_name); | |
8b93c638 JM |
1331 | return; |
1332 | } | |
1333 | if (prer == NULL) | |
1334 | rootlist = NULL; | |
1335 | else | |
1336 | prer->next = cr->next; | |
1337 | } | |
1338 | rootcount--; | |
1339 | } | |
1340 | ||
1341 | } | |
1342 | ||
8b93c638 JM |
1343 | /* Create and install a child of the parent of the given name */ |
1344 | static struct varobj * | |
fba45db2 | 1345 | create_child (struct varobj *parent, int index, char *name) |
8b93c638 JM |
1346 | { |
1347 | struct varobj *child; | |
1348 | char *childs_name; | |
acd65feb | 1349 | struct value *value; |
8b93c638 JM |
1350 | |
1351 | child = new_variable (); | |
1352 | ||
1353 | /* name is allocated by name_of_child */ | |
1354 | child->name = name; | |
1355 | child->index = index; | |
acd65feb | 1356 | value = value_of_child (parent, index); |
8b93c638 JM |
1357 | child->parent = parent; |
1358 | child->root = parent->root; | |
b435e160 | 1359 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1360 | child->obj_name = childs_name; |
1361 | install_variable (child); | |
1362 | ||
acd65feb VP |
1363 | /* Compute the type of the child. Must do this before |
1364 | calling install_new_value. */ | |
1365 | if (value != NULL) | |
1366 | /* If the child had no evaluation errors, var->value | |
1367 | will be non-NULL and contain a valid type. */ | |
1368 | child->type = value_type (value); | |
1369 | else | |
1370 | /* Otherwise, we must compute the type. */ | |
1371 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1372 | child->index); | |
1373 | install_new_value (child, value, 1); | |
1374 | ||
8b93c638 JM |
1375 | return child; |
1376 | } | |
8b93c638 JM |
1377 | \f |
1378 | ||
1379 | /* | |
1380 | * Miscellaneous utility functions. | |
1381 | */ | |
1382 | ||
1383 | /* Allocate memory and initialize a new variable */ | |
1384 | static struct varobj * | |
1385 | new_variable (void) | |
1386 | { | |
1387 | struct varobj *var; | |
1388 | ||
1389 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1390 | var->name = NULL; | |
1391 | var->obj_name = NULL; | |
1392 | var->index = -1; | |
1393 | var->type = NULL; | |
1394 | var->value = NULL; | |
8b93c638 JM |
1395 | var->num_children = -1; |
1396 | var->parent = NULL; | |
1397 | var->children = NULL; | |
1398 | var->format = 0; | |
1399 | var->root = NULL; | |
fb9b6b35 | 1400 | var->updated = 0; |
85265413 | 1401 | var->print_value = NULL; |
8b93c638 JM |
1402 | |
1403 | return var; | |
1404 | } | |
1405 | ||
1406 | /* Allocate memory and initialize a new root variable */ | |
1407 | static struct varobj * | |
1408 | new_root_variable (void) | |
1409 | { | |
1410 | struct varobj *var = new_variable (); | |
1411 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1412 | var->root->lang = NULL; | |
1413 | var->root->exp = NULL; | |
1414 | var->root->valid_block = NULL; | |
7a424e99 | 1415 | var->root->frame = null_frame_id; |
73a93a32 | 1416 | var->root->use_selected_frame = 0; |
8b93c638 | 1417 | var->root->rootvar = NULL; |
8756216b | 1418 | var->root->is_valid = 1; |
8b93c638 JM |
1419 | |
1420 | return var; | |
1421 | } | |
1422 | ||
1423 | /* Free any allocated memory associated with VAR. */ | |
1424 | static void | |
fba45db2 | 1425 | free_variable (struct varobj *var) |
8b93c638 JM |
1426 | { |
1427 | /* Free the expression if this is a root variable. */ | |
b2c2bd75 | 1428 | if (is_root_p (var)) |
8b93c638 | 1429 | { |
96c1eda2 | 1430 | free_current_contents (&var->root->exp); |
8038e1e2 | 1431 | xfree (var->root); |
8b93c638 JM |
1432 | } |
1433 | ||
8038e1e2 AC |
1434 | xfree (var->name); |
1435 | xfree (var->obj_name); | |
85265413 | 1436 | xfree (var->print_value); |
8038e1e2 | 1437 | xfree (var); |
8b93c638 JM |
1438 | } |
1439 | ||
74b7792f AC |
1440 | static void |
1441 | do_free_variable_cleanup (void *var) | |
1442 | { | |
1443 | free_variable (var); | |
1444 | } | |
1445 | ||
1446 | static struct cleanup * | |
1447 | make_cleanup_free_variable (struct varobj *var) | |
1448 | { | |
1449 | return make_cleanup (do_free_variable_cleanup, var); | |
1450 | } | |
1451 | ||
6766a268 DJ |
1452 | /* This returns the type of the variable. It also skips past typedefs |
1453 | to return the real type of the variable. | |
94b66fa7 KS |
1454 | |
1455 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1456 | except within get_target_type and get_type. */ | |
8b93c638 | 1457 | static struct type * |
fba45db2 | 1458 | get_type (struct varobj *var) |
8b93c638 JM |
1459 | { |
1460 | struct type *type; | |
1461 | type = var->type; | |
1462 | ||
6766a268 DJ |
1463 | if (type != NULL) |
1464 | type = check_typedef (type); | |
8b93c638 JM |
1465 | |
1466 | return type; | |
1467 | } | |
1468 | ||
6e2a9270 VP |
1469 | /* Return the type of the value that's stored in VAR, |
1470 | or that would have being stored there if the | |
1471 | value were accessible. | |
1472 | ||
1473 | This differs from VAR->type in that VAR->type is always | |
1474 | the true type of the expession in the source language. | |
1475 | The return value of this function is the type we're | |
1476 | actually storing in varobj, and using for displaying | |
1477 | the values and for comparing previous and new values. | |
1478 | ||
1479 | For example, top-level references are always stripped. */ | |
1480 | static struct type * | |
1481 | get_value_type (struct varobj *var) | |
1482 | { | |
1483 | struct type *type; | |
1484 | ||
1485 | if (var->value) | |
1486 | type = value_type (var->value); | |
1487 | else | |
1488 | type = var->type; | |
1489 | ||
1490 | type = check_typedef (type); | |
1491 | ||
1492 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1493 | type = get_target_type (type); | |
1494 | ||
1495 | type = check_typedef (type); | |
1496 | ||
1497 | return type; | |
1498 | } | |
1499 | ||
8b93c638 | 1500 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
1501 | past typedefs, just like get_type (). |
1502 | ||
1503 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1504 | except within get_target_type and get_type. */ | |
8b93c638 | 1505 | static struct type * |
fba45db2 | 1506 | get_target_type (struct type *type) |
8b93c638 JM |
1507 | { |
1508 | if (type != NULL) | |
1509 | { | |
1510 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1511 | if (type != NULL) |
1512 | type = check_typedef (type); | |
8b93c638 JM |
1513 | } |
1514 | ||
1515 | return type; | |
1516 | } | |
1517 | ||
1518 | /* What is the default display for this variable? We assume that | |
1519 | everything is "natural". Any exceptions? */ | |
1520 | static enum varobj_display_formats | |
fba45db2 | 1521 | variable_default_display (struct varobj *var) |
8b93c638 JM |
1522 | { |
1523 | return FORMAT_NATURAL; | |
1524 | } | |
1525 | ||
8b93c638 JM |
1526 | /* FIXME: The following should be generic for any pointer */ |
1527 | static void | |
fba45db2 | 1528 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
1529 | { |
1530 | struct cpstack *s; | |
1531 | ||
1532 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1533 | s->name = name; | |
1534 | s->next = *pstack; | |
1535 | *pstack = s; | |
1536 | } | |
1537 | ||
1538 | /* FIXME: The following should be generic for any pointer */ | |
1539 | static char * | |
fba45db2 | 1540 | cppop (struct cpstack **pstack) |
8b93c638 JM |
1541 | { |
1542 | struct cpstack *s; | |
1543 | char *v; | |
1544 | ||
1545 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1546 | return NULL; | |
1547 | ||
1548 | s = *pstack; | |
1549 | v = s->name; | |
1550 | *pstack = (*pstack)->next; | |
b8c9b27d | 1551 | xfree (s); |
8b93c638 JM |
1552 | |
1553 | return v; | |
1554 | } | |
1555 | \f | |
1556 | /* | |
1557 | * Language-dependencies | |
1558 | */ | |
1559 | ||
1560 | /* Common entry points */ | |
1561 | ||
1562 | /* Get the language of variable VAR. */ | |
1563 | static enum varobj_languages | |
fba45db2 | 1564 | variable_language (struct varobj *var) |
8b93c638 JM |
1565 | { |
1566 | enum varobj_languages lang; | |
1567 | ||
1568 | switch (var->root->exp->language_defn->la_language) | |
1569 | { | |
1570 | default: | |
1571 | case language_c: | |
1572 | lang = vlang_c; | |
1573 | break; | |
1574 | case language_cplus: | |
1575 | lang = vlang_cplus; | |
1576 | break; | |
1577 | case language_java: | |
1578 | lang = vlang_java; | |
1579 | break; | |
1580 | } | |
1581 | ||
1582 | return lang; | |
1583 | } | |
1584 | ||
1585 | /* Return the number of children for a given variable. | |
1586 | The result of this function is defined by the language | |
1587 | implementation. The number of children returned by this function | |
1588 | is the number of children that the user will see in the variable | |
1589 | display. */ | |
1590 | static int | |
fba45db2 | 1591 | number_of_children (struct varobj *var) |
8b93c638 JM |
1592 | { |
1593 | return (*var->root->lang->number_of_children) (var);; | |
1594 | } | |
1595 | ||
1596 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1597 | static char * | |
fba45db2 | 1598 | name_of_variable (struct varobj *var) |
8b93c638 JM |
1599 | { |
1600 | return (*var->root->lang->name_of_variable) (var); | |
1601 | } | |
1602 | ||
1603 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1604 | static char * | |
fba45db2 | 1605 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
1606 | { |
1607 | return (*var->root->lang->name_of_child) (var, index); | |
1608 | } | |
1609 | ||
30b28db1 | 1610 | /* What is the ``struct value *'' of the root variable VAR? |
73a93a32 JI |
1611 | TYPE_CHANGED controls what to do if the type of a |
1612 | use_selected_frame = 1 variable changes. On input, | |
1613 | TYPE_CHANGED = 1 means discard the old varobj, and replace | |
1614 | it with this one. TYPE_CHANGED = 0 means leave it around. | |
1615 | NB: In both cases, var_handle will point to the new varobj, | |
1616 | so if you use TYPE_CHANGED = 0, you will have to stash the | |
1617 | old varobj pointer away somewhere before calling this. | |
1618 | On return, TYPE_CHANGED will be 1 if the type has changed, and | |
1619 | 0 otherwise. */ | |
30b28db1 | 1620 | static struct value * |
fba45db2 | 1621 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 1622 | { |
73a93a32 JI |
1623 | struct varobj *var; |
1624 | ||
1625 | if (var_handle == NULL) | |
1626 | return NULL; | |
1627 | ||
1628 | var = *var_handle; | |
1629 | ||
1630 | /* This should really be an exception, since this should | |
1631 | only get called with a root variable. */ | |
1632 | ||
b2c2bd75 | 1633 | if (!is_root_p (var)) |
73a93a32 JI |
1634 | return NULL; |
1635 | ||
1636 | if (var->root->use_selected_frame) | |
1637 | { | |
1638 | struct varobj *tmp_var; | |
1639 | char *old_type, *new_type; | |
1640 | old_type = varobj_get_type (var); | |
1641 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
1642 | USE_SELECTED_FRAME); | |
1643 | if (tmp_var == NULL) | |
1644 | { | |
1645 | return NULL; | |
1646 | } | |
1647 | new_type = varobj_get_type (tmp_var); | |
72330bd6 | 1648 | if (strcmp (old_type, new_type) == 0) |
73a93a32 JI |
1649 | { |
1650 | varobj_delete (tmp_var, NULL, 0); | |
1651 | *type_changed = 0; | |
1652 | } | |
1653 | else | |
1654 | { | |
1655 | if (*type_changed) | |
1656 | { | |
72330bd6 | 1657 | tmp_var->obj_name = |
73a93a32 | 1658 | savestring (var->obj_name, strlen (var->obj_name)); |
f7635dd9 | 1659 | varobj_delete (var, NULL, 0); |
73a93a32 JI |
1660 | } |
1661 | else | |
1662 | { | |
72330bd6 | 1663 | tmp_var->obj_name = varobj_gen_name (); |
73a93a32 JI |
1664 | } |
1665 | install_variable (tmp_var); | |
1666 | *var_handle = tmp_var; | |
705da579 | 1667 | var = *var_handle; |
73a93a32 JI |
1668 | *type_changed = 1; |
1669 | } | |
1670 | } | |
1671 | else | |
1672 | { | |
1673 | *type_changed = 0; | |
1674 | } | |
1675 | ||
1676 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1677 | } |
1678 | ||
30b28db1 AC |
1679 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
1680 | static struct value * | |
fba45db2 | 1681 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 1682 | { |
30b28db1 | 1683 | struct value *value; |
8b93c638 JM |
1684 | |
1685 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1686 | ||
8b93c638 JM |
1687 | return value; |
1688 | } | |
1689 | ||
8b93c638 JM |
1690 | /* Is this variable editable? Use the variable's type to make |
1691 | this determination. */ | |
1692 | static int | |
fba45db2 | 1693 | variable_editable (struct varobj *var) |
8b93c638 JM |
1694 | { |
1695 | return (*var->root->lang->variable_editable) (var); | |
1696 | } | |
1697 | ||
1698 | /* GDB already has a command called "value_of_variable". Sigh. */ | |
1699 | static char * | |
fba45db2 | 1700 | my_value_of_variable (struct varobj *var) |
8b93c638 | 1701 | { |
8756216b DP |
1702 | if (var->root->is_valid) |
1703 | return (*var->root->lang->value_of_variable) (var); | |
1704 | else | |
1705 | return NULL; | |
8b93c638 JM |
1706 | } |
1707 | ||
85265413 NR |
1708 | static char * |
1709 | value_get_print_value (struct value *value, enum varobj_display_formats format) | |
1710 | { | |
1711 | long dummy; | |
57e66780 DJ |
1712 | struct ui_file *stb; |
1713 | struct cleanup *old_chain; | |
85265413 | 1714 | char *thevalue; |
57e66780 DJ |
1715 | |
1716 | if (value == NULL) | |
1717 | return NULL; | |
1718 | ||
1719 | stb = mem_fileopen (); | |
1720 | old_chain = make_cleanup_ui_file_delete (stb); | |
1721 | ||
85265413 NR |
1722 | common_val_print (value, stb, format_code[(int) format], 1, 0, 0); |
1723 | thevalue = ui_file_xstrdup (stb, &dummy); | |
57e66780 | 1724 | |
85265413 NR |
1725 | do_cleanups (old_chain); |
1726 | return thevalue; | |
1727 | } | |
1728 | ||
acd65feb VP |
1729 | /* Return non-zero if changes in value of VAR |
1730 | must be detected and reported by -var-update. | |
1731 | Return zero is -var-update should never report | |
1732 | changes of such values. This makes sense for structures | |
1733 | (since the changes in children values will be reported separately), | |
1734 | or for artifical objects (like 'public' pseudo-field in C++). | |
1735 | ||
1736 | Return value of 0 means that gdb need not call value_fetch_lazy | |
1737 | for the value of this variable object. */ | |
8b93c638 | 1738 | static int |
b2c2bd75 | 1739 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
1740 | { |
1741 | int r; | |
1742 | struct type *type; | |
1743 | ||
1744 | if (CPLUS_FAKE_CHILD (var)) | |
1745 | return 0; | |
1746 | ||
6e2a9270 | 1747 | type = get_value_type (var); |
8b93c638 JM |
1748 | |
1749 | switch (TYPE_CODE (type)) | |
1750 | { | |
72330bd6 AC |
1751 | case TYPE_CODE_STRUCT: |
1752 | case TYPE_CODE_UNION: | |
1753 | case TYPE_CODE_ARRAY: | |
1754 | r = 0; | |
1755 | break; | |
8b93c638 | 1756 | |
72330bd6 AC |
1757 | default: |
1758 | r = 1; | |
8b93c638 JM |
1759 | } |
1760 | ||
1761 | return r; | |
1762 | } | |
1763 | ||
2024f65a VP |
1764 | /* Given the value and the type of a variable object, |
1765 | adjust the value and type to those necessary | |
1766 | for getting children of the variable object. | |
1767 | This includes dereferencing top-level references | |
1768 | to all types and dereferencing pointers to | |
1769 | structures. | |
1770 | ||
1771 | Both TYPE and *TYPE should be non-null. VALUE | |
1772 | can be null if we want to only translate type. | |
1773 | *VALUE can be null as well -- if the parent | |
1774 | value is not known. */ | |
1775 | static void | |
1776 | adjust_value_for_child_access (struct value **value, | |
1777 | struct type **type) | |
1778 | { | |
1779 | gdb_assert (type && *type); | |
1780 | ||
1781 | *type = check_typedef (*type); | |
1782 | ||
1783 | /* The type of value stored in varobj, that is passed | |
1784 | to us, is already supposed to be | |
1785 | reference-stripped. */ | |
1786 | ||
1787 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
1788 | ||
1789 | /* Pointers to structures are treated just like | |
1790 | structures when accessing children. Don't | |
1791 | dererences pointers to other types. */ | |
1792 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
1793 | { | |
1794 | struct type *target_type = get_target_type (*type); | |
1795 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
1796 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
1797 | { | |
1798 | if (value && *value) | |
1799 | gdb_value_ind (*value, value); | |
1800 | *type = target_type; | |
1801 | } | |
1802 | } | |
1803 | ||
1804 | /* The 'get_target_type' function calls check_typedef on | |
1805 | result, so we can immediately check type code. No | |
1806 | need to call check_typedef here. */ | |
1807 | } | |
1808 | ||
8b93c638 JM |
1809 | /* C */ |
1810 | static int | |
fba45db2 | 1811 | c_number_of_children (struct varobj *var) |
8b93c638 | 1812 | { |
2024f65a VP |
1813 | struct type *type = get_value_type (var); |
1814 | int children = 0; | |
8b93c638 | 1815 | struct type *target; |
8b93c638 | 1816 | |
2024f65a | 1817 | adjust_value_for_child_access (NULL, &type); |
8b93c638 | 1818 | target = get_target_type (type); |
8b93c638 JM |
1819 | |
1820 | switch (TYPE_CODE (type)) | |
1821 | { | |
1822 | case TYPE_CODE_ARRAY: | |
1823 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
72330bd6 | 1824 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) |
8b93c638 JM |
1825 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
1826 | else | |
74a44383 DJ |
1827 | /* If we don't know how many elements there are, don't display |
1828 | any. */ | |
1829 | children = 0; | |
8b93c638 JM |
1830 | break; |
1831 | ||
1832 | case TYPE_CODE_STRUCT: | |
1833 | case TYPE_CODE_UNION: | |
1834 | children = TYPE_NFIELDS (type); | |
1835 | break; | |
1836 | ||
1837 | case TYPE_CODE_PTR: | |
2024f65a VP |
1838 | /* The type here is a pointer to non-struct. Typically, pointers |
1839 | have one child, except for function ptrs, which have no children, | |
1840 | and except for void*, as we don't know what to show. | |
1841 | ||
0755e6c1 FN |
1842 | We can show char* so we allow it to be dereferenced. If you decide |
1843 | to test for it, please mind that a little magic is necessary to | |
1844 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
1845 | TYPE_NAME == "char" */ | |
2024f65a VP |
1846 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
1847 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
1848 | children = 0; | |
1849 | else | |
1850 | children = 1; | |
8b93c638 JM |
1851 | break; |
1852 | ||
1853 | default: | |
1854 | /* Other types have no children */ | |
1855 | break; | |
1856 | } | |
1857 | ||
1858 | return children; | |
1859 | } | |
1860 | ||
1861 | static char * | |
fba45db2 | 1862 | c_name_of_variable (struct varobj *parent) |
8b93c638 JM |
1863 | { |
1864 | return savestring (parent->name, strlen (parent->name)); | |
1865 | } | |
1866 | ||
bbec2603 VP |
1867 | /* Return the value of element TYPE_INDEX of a structure |
1868 | value VALUE. VALUE's type should be a structure, | |
1869 | or union, or a typedef to struct/union. | |
1870 | ||
1871 | Returns NULL if getting the value fails. Never throws. */ | |
1872 | static struct value * | |
1873 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 1874 | { |
bbec2603 VP |
1875 | struct value *result = NULL; |
1876 | volatile struct gdb_exception e; | |
8b93c638 | 1877 | |
bbec2603 VP |
1878 | struct type *type = value_type (value); |
1879 | type = check_typedef (type); | |
1880 | ||
1881 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
1882 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 1883 | |
bbec2603 VP |
1884 | TRY_CATCH (e, RETURN_MASK_ERROR) |
1885 | { | |
1886 | if (TYPE_FIELD_STATIC (type, type_index)) | |
1887 | result = value_static_field (type, type_index); | |
1888 | else | |
1889 | result = value_primitive_field (value, 0, type_index, type); | |
1890 | } | |
1891 | if (e.reason < 0) | |
1892 | { | |
1893 | return NULL; | |
1894 | } | |
1895 | else | |
1896 | { | |
1897 | return result; | |
1898 | } | |
1899 | } | |
1900 | ||
1901 | /* Obtain the information about child INDEX of the variable | |
1902 | object PARENT. | |
1903 | If CNAME is not null, sets *CNAME to the name of the child relative | |
1904 | to the parent. | |
1905 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
1906 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
1907 | ||
1908 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
1909 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
1910 | to NULL. */ | |
1911 | static void | |
1912 | c_describe_child (struct varobj *parent, int index, | |
1913 | char **cname, struct value **cvalue, struct type **ctype) | |
1914 | { | |
1915 | struct value *value = parent->value; | |
2024f65a | 1916 | struct type *type = get_value_type (parent); |
bbec2603 VP |
1917 | |
1918 | if (cname) | |
1919 | *cname = NULL; | |
1920 | if (cvalue) | |
1921 | *cvalue = NULL; | |
1922 | if (ctype) | |
1923 | *ctype = NULL; | |
1924 | ||
2024f65a | 1925 | adjust_value_for_child_access (&value, &type); |
bbec2603 | 1926 | |
8b93c638 JM |
1927 | switch (TYPE_CODE (type)) |
1928 | { | |
1929 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
1930 | if (cname) |
1931 | *cname = xstrprintf ("%d", index | |
1932 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
1933 | ||
1934 | if (cvalue && value) | |
1935 | { | |
1936 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
1937 | struct value *indval = | |
1938 | value_from_longest (builtin_type_int, (LONGEST) real_index); | |
1939 | gdb_value_subscript (value, indval, cvalue); | |
1940 | } | |
1941 | ||
1942 | if (ctype) | |
1943 | *ctype = get_target_type (type); | |
1944 | ||
8b93c638 JM |
1945 | break; |
1946 | ||
1947 | case TYPE_CODE_STRUCT: | |
1948 | case TYPE_CODE_UNION: | |
bbec2603 VP |
1949 | if (cname) |
1950 | { | |
1951 | char *string = TYPE_FIELD_NAME (type, index); | |
1952 | *cname = savestring (string, strlen (string)); | |
1953 | } | |
1954 | ||
1955 | if (cvalue && value) | |
1956 | { | |
1957 | /* For C, varobj index is the same as type index. */ | |
1958 | *cvalue = value_struct_element_index (value, index); | |
1959 | } | |
1960 | ||
1961 | if (ctype) | |
1962 | *ctype = TYPE_FIELD_TYPE (type, index); | |
1963 | ||
8b93c638 JM |
1964 | break; |
1965 | ||
1966 | case TYPE_CODE_PTR: | |
bbec2603 VP |
1967 | if (cname) |
1968 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 1969 | |
bbec2603 VP |
1970 | if (cvalue && value) |
1971 | gdb_value_ind (value, cvalue); | |
1972 | ||
2024f65a VP |
1973 | /* Don't use get_target_type because it calls |
1974 | check_typedef and here, we want to show the true | |
1975 | declared type of the variable. */ | |
bbec2603 | 1976 | if (ctype) |
2024f65a | 1977 | *ctype = TYPE_TARGET_TYPE (type); |
bbec2603 | 1978 | |
8b93c638 JM |
1979 | break; |
1980 | ||
1981 | default: | |
1982 | /* This should not happen */ | |
bbec2603 VP |
1983 | if (cname) |
1984 | *cname = xstrdup ("???"); | |
1985 | /* Don't set value and type, we don't know then. */ | |
8b93c638 | 1986 | } |
bbec2603 | 1987 | } |
8b93c638 | 1988 | |
bbec2603 VP |
1989 | static char * |
1990 | c_name_of_child (struct varobj *parent, int index) | |
1991 | { | |
1992 | char *name; | |
1993 | c_describe_child (parent, index, &name, NULL, NULL); | |
8b93c638 JM |
1994 | return name; |
1995 | } | |
1996 | ||
30b28db1 | 1997 | static struct value * |
fba45db2 | 1998 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 1999 | { |
5e572bb4 | 2000 | struct value *new_val = NULL; |
73a93a32 | 2001 | struct varobj *var = *var_handle; |
8b93c638 JM |
2002 | struct frame_info *fi; |
2003 | int within_scope; | |
2004 | ||
73a93a32 | 2005 | /* Only root variables can be updated... */ |
b2c2bd75 | 2006 | if (!is_root_p (var)) |
73a93a32 JI |
2007 | /* Not a root var */ |
2008 | return NULL; | |
2009 | ||
72330bd6 | 2010 | |
8b93c638 | 2011 | /* Determine whether the variable is still around. */ |
b20d8971 | 2012 | if (var->root->valid_block == NULL || var->root->use_selected_frame) |
8b93c638 JM |
2013 | within_scope = 1; |
2014 | else | |
2015 | { | |
e64d9b3d | 2016 | fi = frame_find_by_id (var->root->frame); |
8b93c638 JM |
2017 | within_scope = fi != NULL; |
2018 | /* FIXME: select_frame could fail */ | |
d2353924 NR |
2019 | if (fi) |
2020 | { | |
2021 | CORE_ADDR pc = get_frame_pc (fi); | |
2022 | if (pc < BLOCK_START (var->root->valid_block) || | |
2023 | pc >= BLOCK_END (var->root->valid_block)) | |
2024 | within_scope = 0; | |
2d43bda2 NR |
2025 | else |
2026 | select_frame (fi); | |
d2353924 | 2027 | } |
8b93c638 | 2028 | } |
72330bd6 | 2029 | |
8b93c638 JM |
2030 | if (within_scope) |
2031 | { | |
73a93a32 | 2032 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
2033 | expression fails we want to just return NULL. */ |
2034 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
2035 | return new_val; |
2036 | } | |
2037 | ||
2038 | return NULL; | |
2039 | } | |
2040 | ||
30b28db1 | 2041 | static struct value * |
fba45db2 | 2042 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2043 | { |
bbec2603 VP |
2044 | struct value *value = NULL; |
2045 | c_describe_child (parent, index, NULL, &value, NULL); | |
8b93c638 JM |
2046 | |
2047 | return value; | |
2048 | } | |
2049 | ||
2050 | static struct type * | |
fba45db2 | 2051 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2052 | { |
bbec2603 VP |
2053 | struct type *type = NULL; |
2054 | c_describe_child (parent, index, NULL, NULL, &type); | |
8b93c638 JM |
2055 | return type; |
2056 | } | |
2057 | ||
2058 | static int | |
fba45db2 | 2059 | c_variable_editable (struct varobj *var) |
8b93c638 | 2060 | { |
6e2a9270 | 2061 | switch (TYPE_CODE (get_value_type (var))) |
8b93c638 JM |
2062 | { |
2063 | case TYPE_CODE_STRUCT: | |
2064 | case TYPE_CODE_UNION: | |
2065 | case TYPE_CODE_ARRAY: | |
2066 | case TYPE_CODE_FUNC: | |
8b93c638 JM |
2067 | case TYPE_CODE_METHOD: |
2068 | return 0; | |
2069 | break; | |
2070 | ||
2071 | default: | |
2072 | return 1; | |
2073 | break; | |
2074 | } | |
2075 | } | |
2076 | ||
2077 | static char * | |
fba45db2 | 2078 | c_value_of_variable (struct varobj *var) |
8b93c638 | 2079 | { |
14b3d9c9 JB |
2080 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2081 | it will print out its children instead of "{...}". So we need to | |
2082 | catch that case explicitly. */ | |
2083 | struct type *type = get_type (var); | |
e64d9b3d | 2084 | |
14b3d9c9 JB |
2085 | /* Strip top-level references. */ |
2086 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2087 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2088 | ||
2089 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2090 | { |
2091 | case TYPE_CODE_STRUCT: | |
2092 | case TYPE_CODE_UNION: | |
2093 | return xstrdup ("{...}"); | |
2094 | /* break; */ | |
2095 | ||
2096 | case TYPE_CODE_ARRAY: | |
2097 | { | |
e64d9b3d | 2098 | char *number; |
b435e160 | 2099 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2100 | return (number); |
8b93c638 JM |
2101 | } |
2102 | /* break; */ | |
2103 | ||
2104 | default: | |
2105 | { | |
575bbeb6 KS |
2106 | if (var->value == NULL) |
2107 | { | |
2108 | /* This can happen if we attempt to get the value of a struct | |
2109 | member when the parent is an invalid pointer. This is an | |
2110 | error condition, so we should tell the caller. */ | |
2111 | return NULL; | |
2112 | } | |
2113 | else | |
2114 | { | |
b2c2bd75 | 2115 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2116 | gdb_assert (!value_lazy (var->value)); |
85265413 NR |
2117 | return value_get_print_value (var->value, var->format); |
2118 | } | |
e64d9b3d | 2119 | } |
8b93c638 JM |
2120 | } |
2121 | } | |
2122 | \f | |
2123 | ||
2124 | /* C++ */ | |
2125 | ||
2126 | static int | |
fba45db2 | 2127 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2128 | { |
2129 | struct type *type; | |
2130 | int children, dont_know; | |
2131 | ||
2132 | dont_know = 1; | |
2133 | children = 0; | |
2134 | ||
2135 | if (!CPLUS_FAKE_CHILD (var)) | |
2136 | { | |
2024f65a VP |
2137 | type = get_value_type (var); |
2138 | adjust_value_for_child_access (NULL, &type); | |
8b93c638 JM |
2139 | |
2140 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2141 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2142 | { |
2143 | int kids[3]; | |
2144 | ||
2145 | cplus_class_num_children (type, kids); | |
2146 | if (kids[v_public] != 0) | |
2147 | children++; | |
2148 | if (kids[v_private] != 0) | |
2149 | children++; | |
2150 | if (kids[v_protected] != 0) | |
2151 | children++; | |
2152 | ||
2153 | /* Add any baseclasses */ | |
2154 | children += TYPE_N_BASECLASSES (type); | |
2155 | dont_know = 0; | |
2156 | ||
2157 | /* FIXME: save children in var */ | |
2158 | } | |
2159 | } | |
2160 | else | |
2161 | { | |
2162 | int kids[3]; | |
2163 | ||
2024f65a VP |
2164 | type = get_value_type (var->parent); |
2165 | adjust_value_for_child_access (NULL, &type); | |
8b93c638 JM |
2166 | |
2167 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2168 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2169 | children = kids[v_public]; |
6e382aa3 | 2170 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2171 | children = kids[v_private]; |
2172 | else | |
2173 | children = kids[v_protected]; | |
2174 | dont_know = 0; | |
2175 | } | |
2176 | ||
2177 | if (dont_know) | |
2178 | children = c_number_of_children (var); | |
2179 | ||
2180 | return children; | |
2181 | } | |
2182 | ||
2183 | /* Compute # of public, private, and protected variables in this class. | |
2184 | That means we need to descend into all baseclasses and find out | |
2185 | how many are there, too. */ | |
2186 | static void | |
1669605f | 2187 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2188 | { |
2189 | int i; | |
2190 | ||
2191 | children[v_public] = 0; | |
2192 | children[v_private] = 0; | |
2193 | children[v_protected] = 0; | |
2194 | ||
2195 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2196 | { | |
2197 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2198 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2199 | continue; |
2200 | ||
2201 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2202 | children[v_protected]++; | |
2203 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2204 | children[v_private]++; | |
2205 | else | |
2206 | children[v_public]++; | |
2207 | } | |
2208 | } | |
2209 | ||
2210 | static char * | |
fba45db2 | 2211 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2212 | { |
2213 | return c_name_of_variable (parent); | |
2214 | } | |
2215 | ||
2024f65a VP |
2216 | enum accessibility { private_field, protected_field, public_field }; |
2217 | ||
2218 | /* Check if field INDEX of TYPE has the specified accessibility. | |
2219 | Return 0 if so and 1 otherwise. */ | |
2220 | static int | |
2221 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 2222 | { |
2024f65a VP |
2223 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
2224 | return 1; | |
2225 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
2226 | return 1; | |
2227 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
2228 | && !TYPE_FIELD_PROTECTED (type, index)) | |
2229 | return 1; | |
2230 | else | |
2231 | return 0; | |
2232 | } | |
2233 | ||
2234 | static void | |
2235 | cplus_describe_child (struct varobj *parent, int index, | |
2236 | char **cname, struct value **cvalue, struct type **ctype) | |
2237 | { | |
2238 | char *name = 0; | |
2239 | struct value *value; | |
8b93c638 | 2240 | struct type *type; |
8b93c638 | 2241 | |
2024f65a VP |
2242 | if (cname) |
2243 | *cname = NULL; | |
2244 | if (cvalue) | |
2245 | *cvalue = NULL; | |
2246 | if (ctype) | |
2247 | *ctype = NULL; | |
2248 | ||
2249 | ||
8b93c638 JM |
2250 | if (CPLUS_FAKE_CHILD (parent)) |
2251 | { | |
2024f65a VP |
2252 | value = parent->parent->value; |
2253 | type = get_value_type (parent->parent); | |
8b93c638 JM |
2254 | } |
2255 | else | |
2024f65a VP |
2256 | { |
2257 | value = parent->value; | |
2258 | type = get_value_type (parent); | |
2259 | } | |
8b93c638 | 2260 | |
2024f65a VP |
2261 | adjust_value_for_child_access (&value, &type); |
2262 | ||
2263 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2264 | || TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
8b93c638 | 2265 | { |
8b93c638 JM |
2266 | if (CPLUS_FAKE_CHILD (parent)) |
2267 | { | |
6e382aa3 JJ |
2268 | /* The fields of the class type are ordered as they |
2269 | appear in the class. We are given an index for a | |
2270 | particular access control type ("public","protected", | |
2271 | or "private"). We must skip over fields that don't | |
2272 | have the access control we are looking for to properly | |
2273 | find the indexed field. */ | |
2274 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 2275 | enum accessibility acc = public_field; |
6e382aa3 | 2276 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 2277 | acc = private_field; |
6e382aa3 | 2278 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
2279 | acc = protected_field; |
2280 | ||
2281 | while (index >= 0) | |
6e382aa3 | 2282 | { |
2024f65a VP |
2283 | if (TYPE_VPTR_BASETYPE (type) == type |
2284 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2285 | ; /* ignore vptr */ | |
2286 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
2287 | --index; |
2288 | ++type_index; | |
6e382aa3 | 2289 | } |
2024f65a VP |
2290 | --type_index; |
2291 | ||
2292 | if (cname) | |
2293 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
2294 | ||
2295 | if (cvalue && value) | |
2296 | *cvalue = value_struct_element_index (value, type_index); | |
2297 | ||
2298 | if (ctype) | |
2299 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
2300 | } | |
2301 | else if (index < TYPE_N_BASECLASSES (type)) | |
2302 | { | |
2303 | /* This is a baseclass. */ | |
2304 | if (cname) | |
2305 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
2306 | ||
2307 | if (cvalue && value) | |
6e382aa3 | 2308 | { |
2024f65a | 2309 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
6e382aa3 JJ |
2310 | } |
2311 | ||
2024f65a VP |
2312 | if (ctype) |
2313 | { | |
2314 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2315 | } | |
8b93c638 | 2316 | } |
8b93c638 JM |
2317 | else |
2318 | { | |
2024f65a | 2319 | char *access = 0; |
6e382aa3 | 2320 | int children[3]; |
2024f65a | 2321 | cplus_class_num_children (type, children); |
6e382aa3 | 2322 | |
8b93c638 | 2323 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2324 | only be "public", "private", or "protected" |
2325 | ||
2326 | The special "fake" children are always output by varobj in | |
2327 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2328 | index -= TYPE_N_BASECLASSES (type); |
2329 | switch (index) | |
2330 | { | |
2331 | case 0: | |
6e382aa3 | 2332 | if (children[v_public] > 0) |
2024f65a | 2333 | access = "public"; |
6e382aa3 | 2334 | else if (children[v_private] > 0) |
2024f65a | 2335 | access = "private"; |
6e382aa3 | 2336 | else |
2024f65a | 2337 | access = "protected"; |
6e382aa3 | 2338 | break; |
8b93c638 | 2339 | case 1: |
6e382aa3 | 2340 | if (children[v_public] > 0) |
8b93c638 | 2341 | { |
6e382aa3 | 2342 | if (children[v_private] > 0) |
2024f65a | 2343 | access = "private"; |
6e382aa3 | 2344 | else |
2024f65a | 2345 | access = "protected"; |
8b93c638 | 2346 | } |
6e382aa3 | 2347 | else if (children[v_private] > 0) |
2024f65a | 2348 | access = "protected"; |
6e382aa3 | 2349 | break; |
8b93c638 | 2350 | case 2: |
6e382aa3 | 2351 | /* Must be protected */ |
2024f65a | 2352 | access = "protected"; |
6e382aa3 | 2353 | break; |
8b93c638 JM |
2354 | default: |
2355 | /* error! */ | |
2356 | break; | |
2357 | } | |
2024f65a VP |
2358 | |
2359 | if (cname) | |
2360 | *cname = xstrdup (access); | |
8b93c638 | 2361 | |
2024f65a VP |
2362 | /* Value and type are null here. */ |
2363 | } | |
8b93c638 | 2364 | } |
8b93c638 JM |
2365 | else |
2366 | { | |
2024f65a VP |
2367 | c_describe_child (parent, index, cname, cvalue, ctype); |
2368 | } | |
2369 | } | |
8b93c638 | 2370 | |
2024f65a VP |
2371 | static char * |
2372 | cplus_name_of_child (struct varobj *parent, int index) | |
2373 | { | |
2374 | char *name = NULL; | |
2375 | cplus_describe_child (parent, index, &name, NULL, NULL); | |
8b93c638 JM |
2376 | return name; |
2377 | } | |
2378 | ||
30b28db1 | 2379 | static struct value * |
fba45db2 | 2380 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2381 | { |
73a93a32 | 2382 | return c_value_of_root (var_handle); |
8b93c638 JM |
2383 | } |
2384 | ||
30b28db1 | 2385 | static struct value * |
fba45db2 | 2386 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2387 | { |
2024f65a VP |
2388 | struct value *value = NULL; |
2389 | cplus_describe_child (parent, index, NULL, &value, NULL); | |
8b93c638 JM |
2390 | return value; |
2391 | } | |
2392 | ||
2393 | static struct type * | |
fba45db2 | 2394 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2395 | { |
2024f65a VP |
2396 | struct type *type = NULL; |
2397 | cplus_describe_child (parent, index, NULL, NULL, &type); | |
8b93c638 JM |
2398 | return type; |
2399 | } | |
2400 | ||
2401 | static int | |
fba45db2 | 2402 | cplus_variable_editable (struct varobj *var) |
8b93c638 JM |
2403 | { |
2404 | if (CPLUS_FAKE_CHILD (var)) | |
2405 | return 0; | |
2406 | ||
2407 | return c_variable_editable (var); | |
2408 | } | |
2409 | ||
2410 | static char * | |
fba45db2 | 2411 | cplus_value_of_variable (struct varobj *var) |
8b93c638 JM |
2412 | { |
2413 | ||
2414 | /* If we have one of our special types, don't print out | |
2415 | any value. */ | |
2416 | if (CPLUS_FAKE_CHILD (var)) | |
2417 | return xstrdup (""); | |
2418 | ||
2419 | return c_value_of_variable (var); | |
2420 | } | |
2421 | \f | |
2422 | /* Java */ | |
2423 | ||
2424 | static int | |
fba45db2 | 2425 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2426 | { |
2427 | return cplus_number_of_children (var); | |
2428 | } | |
2429 | ||
2430 | static char * | |
fba45db2 | 2431 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2432 | { |
2433 | char *p, *name; | |
2434 | ||
2435 | name = cplus_name_of_variable (parent); | |
2436 | /* If the name has "-" in it, it is because we | |
2437 | needed to escape periods in the name... */ | |
2438 | p = name; | |
2439 | ||
2440 | while (*p != '\000') | |
2441 | { | |
2442 | if (*p == '-') | |
2443 | *p = '.'; | |
2444 | p++; | |
2445 | } | |
2446 | ||
2447 | return name; | |
2448 | } | |
2449 | ||
2450 | static char * | |
fba45db2 | 2451 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2452 | { |
2453 | char *name, *p; | |
2454 | ||
2455 | name = cplus_name_of_child (parent, index); | |
2456 | /* Escape any periods in the name... */ | |
2457 | p = name; | |
2458 | ||
2459 | while (*p != '\000') | |
2460 | { | |
2461 | if (*p == '.') | |
2462 | *p = '-'; | |
2463 | p++; | |
2464 | } | |
2465 | ||
2466 | return name; | |
2467 | } | |
2468 | ||
30b28db1 | 2469 | static struct value * |
fba45db2 | 2470 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2471 | { |
73a93a32 | 2472 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2473 | } |
2474 | ||
30b28db1 | 2475 | static struct value * |
fba45db2 | 2476 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2477 | { |
2478 | return cplus_value_of_child (parent, index); | |
2479 | } | |
2480 | ||
2481 | static struct type * | |
fba45db2 | 2482 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2483 | { |
2484 | return cplus_type_of_child (parent, index); | |
2485 | } | |
2486 | ||
2487 | static int | |
fba45db2 | 2488 | java_variable_editable (struct varobj *var) |
8b93c638 JM |
2489 | { |
2490 | return cplus_variable_editable (var); | |
2491 | } | |
2492 | ||
2493 | static char * | |
fba45db2 | 2494 | java_value_of_variable (struct varobj *var) |
8b93c638 JM |
2495 | { |
2496 | return cplus_value_of_variable (var); | |
2497 | } | |
2498 | \f | |
2499 | extern void _initialize_varobj (void); | |
2500 | void | |
2501 | _initialize_varobj (void) | |
2502 | { | |
2503 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2504 | ||
2505 | varobj_table = xmalloc (sizeof_table); | |
2506 | memset (varobj_table, 0, sizeof_table); | |
2507 | ||
85c07804 AC |
2508 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2509 | &varobjdebug, _("\ | |
2510 | Set varobj debugging."), _("\ | |
2511 | Show varobj debugging."), _("\ | |
2512 | When non-zero, varobj debugging is enabled."), | |
2513 | NULL, | |
920d2a44 | 2514 | show_varobjdebug, |
85c07804 | 2515 | &setlist, &showlist); |
8b93c638 | 2516 | } |
8756216b DP |
2517 | |
2518 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2519 | are defined on globals. | |
2520 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2521 | void | |
2522 | varobj_invalidate (void) | |
2523 | { | |
2524 | struct varobj **all_rootvarobj; | |
2525 | struct varobj **varp; | |
2526 | ||
2527 | if (varobj_list (&all_rootvarobj) > 0) | |
2528 | { | |
2529 | varp = all_rootvarobj; | |
2530 | while (*varp != NULL) | |
2531 | { | |
2532 | /* global var must be re-evaluated. */ | |
2533 | if ((*varp)->root->valid_block == NULL) | |
2534 | { | |
2535 | struct varobj *tmp_var; | |
2536 | ||
2537 | /* Try to create a varobj with same expression. If we succeed replace | |
2538 | the old varobj, otherwise invalidate it. */ | |
2539 | tmp_var = varobj_create (NULL, (*varp)->name, (CORE_ADDR) 0, USE_CURRENT_FRAME); | |
2540 | if (tmp_var != NULL) | |
2541 | { | |
2542 | tmp_var->obj_name = xstrdup ((*varp)->obj_name); | |
2543 | varobj_delete (*varp, NULL, 0); | |
2544 | install_variable (tmp_var); | |
2545 | } | |
2546 | else | |
2547 | (*varp)->root->is_valid = 0; | |
2548 | } | |
2549 | else /* locals must be invalidated. */ | |
2550 | (*varp)->root->is_valid = 0; | |
2551 | ||
2552 | varp++; | |
2553 | } | |
2554 | xfree (all_rootvarobj); | |
2555 | } | |
2556 | return; | |
2557 | } |