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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; | |
a6c442d8 | 1040 | int error = 0; |
73a93a32 | 1041 | int type_changed; |
8b93c638 JM |
1042 | int i; |
1043 | int vleft; | |
8b93c638 JM |
1044 | struct varobj *v; |
1045 | struct varobj **cv; | |
2c67cb8b | 1046 | struct varobj **templist = NULL; |
30b28db1 | 1047 | struct value *new; |
28335dcc VP |
1048 | VEC (varobj_p) *stack = NULL; |
1049 | VEC (varobj_p) *result = NULL; | |
e64d9b3d MH |
1050 | struct frame_id old_fid; |
1051 | struct frame_info *fi; | |
8b93c638 | 1052 | |
8756216b | 1053 | /* sanity check: have we been passed a pointer? */ |
8b93c638 | 1054 | if (changelist == NULL) |
8756216b | 1055 | return WRONG_PARAM; |
8b93c638 | 1056 | |
8756216b | 1057 | /* Only root variables can be updated... */ |
b2c2bd75 | 1058 | if (!is_root_p (*varp)) |
8756216b DP |
1059 | /* Not a root var. */ |
1060 | return WRONG_PARAM; | |
1061 | ||
1062 | if (!(*varp)->root->is_valid) | |
1063 | return INVALID; | |
8b93c638 JM |
1064 | |
1065 | /* Save the selected stack frame, since we will need to change it | |
8756216b | 1066 | in order to evaluate expressions. */ |
206415a3 | 1067 | old_fid = get_frame_id (deprecated_safe_get_selected_frame ()); |
8b93c638 JM |
1068 | |
1069 | /* Update the root variable. value_of_root can return NULL | |
1070 | if the variable is no longer around, i.e. we stepped out of | |
73a93a32 JI |
1071 | the frame in which a local existed. We are letting the |
1072 | value_of_root variable dispose of the varobj if the type | |
8756216b | 1073 | has changed. */ |
73a93a32 | 1074 | type_changed = 1; |
705da579 | 1075 | new = value_of_root (varp, &type_changed); |
0d2bd018 | 1076 | |
8756216b | 1077 | /* Restore selected frame. */ |
0d2bd018 NR |
1078 | fi = frame_find_by_id (old_fid); |
1079 | if (fi) | |
1080 | select_frame (fi); | |
1081 | ||
ae093f96 | 1082 | /* If this is a "use_selected_frame" varobj, and its type has changed, |
8756216b | 1083 | them note that it's changed. */ |
ae093f96 | 1084 | if (type_changed) |
28335dcc | 1085 | VEC_safe_push (varobj_p, result, *varp); |
acd65feb VP |
1086 | |
1087 | if (install_new_value ((*varp), new, type_changed)) | |
ae093f96 | 1088 | { |
acd65feb VP |
1089 | /* If type_changed is 1, install_new_value will never return |
1090 | non-zero, so we'll never report the same variable twice. */ | |
1091 | gdb_assert (!type_changed); | |
28335dcc | 1092 | VEC_safe_push (varobj_p, result, *varp); |
8b93c638 | 1093 | } |
8b93c638 | 1094 | |
b20d8971 VP |
1095 | if (new == NULL) |
1096 | { | |
1097 | /* This means the varobj itself is out of scope. | |
1098 | Report it. */ | |
1099 | VEC_free (varobj_p, result); | |
8756216b | 1100 | return NOT_IN_SCOPE; |
b20d8971 VP |
1101 | } |
1102 | ||
28335dcc | 1103 | VEC_safe_push (varobj_p, stack, *varp); |
8b93c638 | 1104 | |
8756216b | 1105 | /* Walk through the children, reconstructing them all. */ |
28335dcc | 1106 | while (!VEC_empty (varobj_p, stack)) |
8b93c638 | 1107 | { |
28335dcc VP |
1108 | v = VEC_pop (varobj_p, stack); |
1109 | ||
1110 | /* Push any children. Use reverse order so that the first | |
1111 | child is popped from the work stack first, and so | |
1112 | will be added to result first. This does not | |
1113 | affect correctness, just "nicer". */ | |
1114 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1115 | { |
28335dcc VP |
1116 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1117 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
1118 | if (c != NULL) | |
1119 | VEC_safe_push (varobj_p, stack, c); | |
8b93c638 JM |
1120 | } |
1121 | ||
28335dcc VP |
1122 | /* Update this variable, unless it's a root, which is already |
1123 | updated. */ | |
1124 | if (v != *varp) | |
1125 | { | |
1126 | new = value_of_child (v->parent, v->index); | |
1127 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1128 | { | |
1129 | /* Note that it's changed */ | |
1130 | VEC_safe_push (varobj_p, result, v); | |
1131 | v->updated = 0; | |
1132 | } | |
8b93c638 | 1133 | } |
8b93c638 JM |
1134 | } |
1135 | ||
8756216b | 1136 | /* Alloc (changed + 1) list entries. */ |
28335dcc | 1137 | changed = VEC_length (varobj_p, result); |
8b93c638 | 1138 | *changelist = xmalloc ((changed + 1) * sizeof (struct varobj *)); |
28335dcc | 1139 | cv = *changelist; |
8b93c638 | 1140 | |
28335dcc | 1141 | for (i = 0; i < changed; ++i) |
8b93c638 | 1142 | { |
28335dcc VP |
1143 | *cv = VEC_index (varobj_p, result, i); |
1144 | gdb_assert (*cv != NULL); | |
1145 | ++cv; | |
8b93c638 | 1146 | } |
28335dcc | 1147 | *cv = 0; |
8b93c638 | 1148 | |
73a93a32 | 1149 | if (type_changed) |
8756216b | 1150 | return TYPE_CHANGED; |
73a93a32 JI |
1151 | else |
1152 | return changed; | |
8b93c638 JM |
1153 | } |
1154 | \f | |
1155 | ||
1156 | /* Helper functions */ | |
1157 | ||
1158 | /* | |
1159 | * Variable object construction/destruction | |
1160 | */ | |
1161 | ||
1162 | static int | |
fba45db2 KB |
1163 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1164 | int only_children_p) | |
8b93c638 JM |
1165 | { |
1166 | int delcount = 0; | |
1167 | ||
1168 | delete_variable_1 (resultp, &delcount, var, | |
1169 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1170 | ||
1171 | return delcount; | |
1172 | } | |
1173 | ||
1174 | /* Delete the variable object VAR and its children */ | |
1175 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1176 | and the parent is not removed we dump core. It must be always | |
1177 | initially called with remove_from_parent_p set */ | |
1178 | static void | |
72330bd6 AC |
1179 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1180 | struct varobj *var, int only_children_p, | |
1181 | int remove_from_parent_p) | |
8b93c638 | 1182 | { |
28335dcc | 1183 | int i; |
8b93c638 JM |
1184 | |
1185 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1186 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1187 | { | |
1188 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
8b93c638 | 1189 | if (!remove_from_parent_p) |
28335dcc VP |
1190 | child->parent = NULL; |
1191 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1192 | } |
28335dcc | 1193 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1194 | |
1195 | /* if we were called to delete only the children we are done here */ | |
1196 | if (only_children_p) | |
1197 | return; | |
1198 | ||
1199 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1200 | /* If the name is null, this is a temporary variable, that has not |
1201 | yet been installed, don't report it, it belongs to the caller... */ | |
1202 | if (var->obj_name != NULL) | |
8b93c638 | 1203 | { |
5b616ba1 | 1204 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1205 | *delcountp = *delcountp + 1; |
1206 | } | |
1207 | ||
1208 | /* If this variable has a parent, remove it from its parent's list */ | |
1209 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1210 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1211 | expensive list search to find the element to remove when we are | |
1212 | discarding the list afterwards */ | |
72330bd6 | 1213 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1214 | { |
28335dcc | 1215 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1216 | } |
72330bd6 | 1217 | |
73a93a32 JI |
1218 | if (var->obj_name != NULL) |
1219 | uninstall_variable (var); | |
8b93c638 JM |
1220 | |
1221 | /* Free memory associated with this variable */ | |
1222 | free_variable (var); | |
1223 | } | |
1224 | ||
1225 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1226 | static int | |
fba45db2 | 1227 | install_variable (struct varobj *var) |
8b93c638 JM |
1228 | { |
1229 | struct vlist *cv; | |
1230 | struct vlist *newvl; | |
1231 | const char *chp; | |
1232 | unsigned int index = 0; | |
1233 | unsigned int i = 1; | |
1234 | ||
1235 | for (chp = var->obj_name; *chp; chp++) | |
1236 | { | |
1237 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1238 | } | |
1239 | ||
1240 | cv = *(varobj_table + index); | |
1241 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1242 | cv = cv->next; | |
1243 | ||
1244 | if (cv != NULL) | |
8a3fe4f8 | 1245 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1246 | |
1247 | /* Add varobj to hash table */ | |
1248 | newvl = xmalloc (sizeof (struct vlist)); | |
1249 | newvl->next = *(varobj_table + index); | |
1250 | newvl->var = var; | |
1251 | *(varobj_table + index) = newvl; | |
1252 | ||
1253 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1254 | if (is_root_p (var)) |
8b93c638 JM |
1255 | { |
1256 | /* Add to list of root variables */ | |
1257 | if (rootlist == NULL) | |
1258 | var->root->next = NULL; | |
1259 | else | |
1260 | var->root->next = rootlist; | |
1261 | rootlist = var->root; | |
1262 | rootcount++; | |
1263 | } | |
1264 | ||
1265 | return 1; /* OK */ | |
1266 | } | |
1267 | ||
1268 | /* Unistall the object VAR. */ | |
1269 | static void | |
fba45db2 | 1270 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1271 | { |
1272 | struct vlist *cv; | |
1273 | struct vlist *prev; | |
1274 | struct varobj_root *cr; | |
1275 | struct varobj_root *prer; | |
1276 | const char *chp; | |
1277 | unsigned int index = 0; | |
1278 | unsigned int i = 1; | |
1279 | ||
1280 | /* Remove varobj from hash table */ | |
1281 | for (chp = var->obj_name; *chp; chp++) | |
1282 | { | |
1283 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1284 | } | |
1285 | ||
1286 | cv = *(varobj_table + index); | |
1287 | prev = NULL; | |
1288 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1289 | { | |
1290 | prev = cv; | |
1291 | cv = cv->next; | |
1292 | } | |
1293 | ||
1294 | if (varobjdebug) | |
1295 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1296 | ||
1297 | if (cv == NULL) | |
1298 | { | |
72330bd6 AC |
1299 | warning |
1300 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1301 | var->obj_name); | |
8b93c638 JM |
1302 | return; |
1303 | } | |
1304 | ||
1305 | if (prev == NULL) | |
1306 | *(varobj_table + index) = cv->next; | |
1307 | else | |
1308 | prev->next = cv->next; | |
1309 | ||
b8c9b27d | 1310 | xfree (cv); |
8b93c638 JM |
1311 | |
1312 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1313 | if (is_root_p (var)) |
8b93c638 JM |
1314 | { |
1315 | /* Remove from list of root variables */ | |
1316 | if (rootlist == var->root) | |
1317 | rootlist = var->root->next; | |
1318 | else | |
1319 | { | |
1320 | prer = NULL; | |
1321 | cr = rootlist; | |
1322 | while ((cr != NULL) && (cr->rootvar != var)) | |
1323 | { | |
1324 | prer = cr; | |
1325 | cr = cr->next; | |
1326 | } | |
1327 | if (cr == NULL) | |
1328 | { | |
72330bd6 AC |
1329 | warning |
1330 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1331 | var->obj_name); | |
8b93c638 JM |
1332 | return; |
1333 | } | |
1334 | if (prer == NULL) | |
1335 | rootlist = NULL; | |
1336 | else | |
1337 | prer->next = cr->next; | |
1338 | } | |
1339 | rootcount--; | |
1340 | } | |
1341 | ||
1342 | } | |
1343 | ||
8b93c638 JM |
1344 | /* Create and install a child of the parent of the given name */ |
1345 | static struct varobj * | |
fba45db2 | 1346 | create_child (struct varobj *parent, int index, char *name) |
8b93c638 JM |
1347 | { |
1348 | struct varobj *child; | |
1349 | char *childs_name; | |
acd65feb | 1350 | struct value *value; |
8b93c638 JM |
1351 | |
1352 | child = new_variable (); | |
1353 | ||
1354 | /* name is allocated by name_of_child */ | |
1355 | child->name = name; | |
1356 | child->index = index; | |
acd65feb | 1357 | value = value_of_child (parent, index); |
8b93c638 JM |
1358 | child->parent = parent; |
1359 | child->root = parent->root; | |
b435e160 | 1360 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1361 | child->obj_name = childs_name; |
1362 | install_variable (child); | |
1363 | ||
acd65feb VP |
1364 | /* Compute the type of the child. Must do this before |
1365 | calling install_new_value. */ | |
1366 | if (value != NULL) | |
1367 | /* If the child had no evaluation errors, var->value | |
1368 | will be non-NULL and contain a valid type. */ | |
1369 | child->type = value_type (value); | |
1370 | else | |
1371 | /* Otherwise, we must compute the type. */ | |
1372 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1373 | child->index); | |
1374 | install_new_value (child, value, 1); | |
1375 | ||
8b93c638 JM |
1376 | return child; |
1377 | } | |
8b93c638 JM |
1378 | \f |
1379 | ||
1380 | /* | |
1381 | * Miscellaneous utility functions. | |
1382 | */ | |
1383 | ||
1384 | /* Allocate memory and initialize a new variable */ | |
1385 | static struct varobj * | |
1386 | new_variable (void) | |
1387 | { | |
1388 | struct varobj *var; | |
1389 | ||
1390 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1391 | var->name = NULL; | |
1392 | var->obj_name = NULL; | |
1393 | var->index = -1; | |
1394 | var->type = NULL; | |
1395 | var->value = NULL; | |
8b93c638 JM |
1396 | var->num_children = -1; |
1397 | var->parent = NULL; | |
1398 | var->children = NULL; | |
1399 | var->format = 0; | |
1400 | var->root = NULL; | |
fb9b6b35 | 1401 | var->updated = 0; |
85265413 | 1402 | var->print_value = NULL; |
8b93c638 JM |
1403 | |
1404 | return var; | |
1405 | } | |
1406 | ||
1407 | /* Allocate memory and initialize a new root variable */ | |
1408 | static struct varobj * | |
1409 | new_root_variable (void) | |
1410 | { | |
1411 | struct varobj *var = new_variable (); | |
1412 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1413 | var->root->lang = NULL; | |
1414 | var->root->exp = NULL; | |
1415 | var->root->valid_block = NULL; | |
7a424e99 | 1416 | var->root->frame = null_frame_id; |
73a93a32 | 1417 | var->root->use_selected_frame = 0; |
8b93c638 | 1418 | var->root->rootvar = NULL; |
8756216b | 1419 | var->root->is_valid = 1; |
8b93c638 JM |
1420 | |
1421 | return var; | |
1422 | } | |
1423 | ||
1424 | /* Free any allocated memory associated with VAR. */ | |
1425 | static void | |
fba45db2 | 1426 | free_variable (struct varobj *var) |
8b93c638 JM |
1427 | { |
1428 | /* Free the expression if this is a root variable. */ | |
b2c2bd75 | 1429 | if (is_root_p (var)) |
8b93c638 | 1430 | { |
96c1eda2 | 1431 | free_current_contents (&var->root->exp); |
8038e1e2 | 1432 | xfree (var->root); |
8b93c638 JM |
1433 | } |
1434 | ||
8038e1e2 AC |
1435 | xfree (var->name); |
1436 | xfree (var->obj_name); | |
85265413 | 1437 | xfree (var->print_value); |
8038e1e2 | 1438 | xfree (var); |
8b93c638 JM |
1439 | } |
1440 | ||
74b7792f AC |
1441 | static void |
1442 | do_free_variable_cleanup (void *var) | |
1443 | { | |
1444 | free_variable (var); | |
1445 | } | |
1446 | ||
1447 | static struct cleanup * | |
1448 | make_cleanup_free_variable (struct varobj *var) | |
1449 | { | |
1450 | return make_cleanup (do_free_variable_cleanup, var); | |
1451 | } | |
1452 | ||
6766a268 DJ |
1453 | /* This returns the type of the variable. It also skips past typedefs |
1454 | to return the real type of the variable. | |
94b66fa7 KS |
1455 | |
1456 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1457 | except within get_target_type and get_type. */ | |
8b93c638 | 1458 | static struct type * |
fba45db2 | 1459 | get_type (struct varobj *var) |
8b93c638 JM |
1460 | { |
1461 | struct type *type; | |
1462 | type = var->type; | |
1463 | ||
6766a268 DJ |
1464 | if (type != NULL) |
1465 | type = check_typedef (type); | |
8b93c638 JM |
1466 | |
1467 | return type; | |
1468 | } | |
1469 | ||
6e2a9270 VP |
1470 | /* Return the type of the value that's stored in VAR, |
1471 | or that would have being stored there if the | |
1472 | value were accessible. | |
1473 | ||
1474 | This differs from VAR->type in that VAR->type is always | |
1475 | the true type of the expession in the source language. | |
1476 | The return value of this function is the type we're | |
1477 | actually storing in varobj, and using for displaying | |
1478 | the values and for comparing previous and new values. | |
1479 | ||
1480 | For example, top-level references are always stripped. */ | |
1481 | static struct type * | |
1482 | get_value_type (struct varobj *var) | |
1483 | { | |
1484 | struct type *type; | |
1485 | ||
1486 | if (var->value) | |
1487 | type = value_type (var->value); | |
1488 | else | |
1489 | type = var->type; | |
1490 | ||
1491 | type = check_typedef (type); | |
1492 | ||
1493 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1494 | type = get_target_type (type); | |
1495 | ||
1496 | type = check_typedef (type); | |
1497 | ||
1498 | return type; | |
1499 | } | |
1500 | ||
8b93c638 | 1501 | /* This returns the target type (or NULL) of TYPE, also skipping |
94b66fa7 KS |
1502 | past typedefs, just like get_type (). |
1503 | ||
1504 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1505 | except within get_target_type and get_type. */ | |
8b93c638 | 1506 | static struct type * |
fba45db2 | 1507 | get_target_type (struct type *type) |
8b93c638 JM |
1508 | { |
1509 | if (type != NULL) | |
1510 | { | |
1511 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1512 | if (type != NULL) |
1513 | type = check_typedef (type); | |
8b93c638 JM |
1514 | } |
1515 | ||
1516 | return type; | |
1517 | } | |
1518 | ||
1519 | /* What is the default display for this variable? We assume that | |
1520 | everything is "natural". Any exceptions? */ | |
1521 | static enum varobj_display_formats | |
fba45db2 | 1522 | variable_default_display (struct varobj *var) |
8b93c638 JM |
1523 | { |
1524 | return FORMAT_NATURAL; | |
1525 | } | |
1526 | ||
8b93c638 JM |
1527 | /* FIXME: The following should be generic for any pointer */ |
1528 | static void | |
fba45db2 | 1529 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
1530 | { |
1531 | struct cpstack *s; | |
1532 | ||
1533 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1534 | s->name = name; | |
1535 | s->next = *pstack; | |
1536 | *pstack = s; | |
1537 | } | |
1538 | ||
1539 | /* FIXME: The following should be generic for any pointer */ | |
1540 | static char * | |
fba45db2 | 1541 | cppop (struct cpstack **pstack) |
8b93c638 JM |
1542 | { |
1543 | struct cpstack *s; | |
1544 | char *v; | |
1545 | ||
1546 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1547 | return NULL; | |
1548 | ||
1549 | s = *pstack; | |
1550 | v = s->name; | |
1551 | *pstack = (*pstack)->next; | |
b8c9b27d | 1552 | xfree (s); |
8b93c638 JM |
1553 | |
1554 | return v; | |
1555 | } | |
1556 | \f | |
1557 | /* | |
1558 | * Language-dependencies | |
1559 | */ | |
1560 | ||
1561 | /* Common entry points */ | |
1562 | ||
1563 | /* Get the language of variable VAR. */ | |
1564 | static enum varobj_languages | |
fba45db2 | 1565 | variable_language (struct varobj *var) |
8b93c638 JM |
1566 | { |
1567 | enum varobj_languages lang; | |
1568 | ||
1569 | switch (var->root->exp->language_defn->la_language) | |
1570 | { | |
1571 | default: | |
1572 | case language_c: | |
1573 | lang = vlang_c; | |
1574 | break; | |
1575 | case language_cplus: | |
1576 | lang = vlang_cplus; | |
1577 | break; | |
1578 | case language_java: | |
1579 | lang = vlang_java; | |
1580 | break; | |
1581 | } | |
1582 | ||
1583 | return lang; | |
1584 | } | |
1585 | ||
1586 | /* Return the number of children for a given variable. | |
1587 | The result of this function is defined by the language | |
1588 | implementation. The number of children returned by this function | |
1589 | is the number of children that the user will see in the variable | |
1590 | display. */ | |
1591 | static int | |
fba45db2 | 1592 | number_of_children (struct varobj *var) |
8b93c638 JM |
1593 | { |
1594 | return (*var->root->lang->number_of_children) (var);; | |
1595 | } | |
1596 | ||
1597 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1598 | static char * | |
fba45db2 | 1599 | name_of_variable (struct varobj *var) |
8b93c638 JM |
1600 | { |
1601 | return (*var->root->lang->name_of_variable) (var); | |
1602 | } | |
1603 | ||
1604 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1605 | static char * | |
fba45db2 | 1606 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
1607 | { |
1608 | return (*var->root->lang->name_of_child) (var, index); | |
1609 | } | |
1610 | ||
30b28db1 | 1611 | /* What is the ``struct value *'' of the root variable VAR? |
73a93a32 JI |
1612 | TYPE_CHANGED controls what to do if the type of a |
1613 | use_selected_frame = 1 variable changes. On input, | |
1614 | TYPE_CHANGED = 1 means discard the old varobj, and replace | |
1615 | it with this one. TYPE_CHANGED = 0 means leave it around. | |
1616 | NB: In both cases, var_handle will point to the new varobj, | |
1617 | so if you use TYPE_CHANGED = 0, you will have to stash the | |
1618 | old varobj pointer away somewhere before calling this. | |
1619 | On return, TYPE_CHANGED will be 1 if the type has changed, and | |
1620 | 0 otherwise. */ | |
30b28db1 | 1621 | static struct value * |
fba45db2 | 1622 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 1623 | { |
73a93a32 JI |
1624 | struct varobj *var; |
1625 | ||
1626 | if (var_handle == NULL) | |
1627 | return NULL; | |
1628 | ||
1629 | var = *var_handle; | |
1630 | ||
1631 | /* This should really be an exception, since this should | |
1632 | only get called with a root variable. */ | |
1633 | ||
b2c2bd75 | 1634 | if (!is_root_p (var)) |
73a93a32 JI |
1635 | return NULL; |
1636 | ||
1637 | if (var->root->use_selected_frame) | |
1638 | { | |
1639 | struct varobj *tmp_var; | |
1640 | char *old_type, *new_type; | |
1641 | old_type = varobj_get_type (var); | |
1642 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
1643 | USE_SELECTED_FRAME); | |
1644 | if (tmp_var == NULL) | |
1645 | { | |
1646 | return NULL; | |
1647 | } | |
1648 | new_type = varobj_get_type (tmp_var); | |
72330bd6 | 1649 | if (strcmp (old_type, new_type) == 0) |
73a93a32 JI |
1650 | { |
1651 | varobj_delete (tmp_var, NULL, 0); | |
1652 | *type_changed = 0; | |
1653 | } | |
1654 | else | |
1655 | { | |
1656 | if (*type_changed) | |
1657 | { | |
72330bd6 | 1658 | tmp_var->obj_name = |
73a93a32 | 1659 | savestring (var->obj_name, strlen (var->obj_name)); |
f7635dd9 | 1660 | varobj_delete (var, NULL, 0); |
73a93a32 JI |
1661 | } |
1662 | else | |
1663 | { | |
72330bd6 | 1664 | tmp_var->obj_name = varobj_gen_name (); |
73a93a32 JI |
1665 | } |
1666 | install_variable (tmp_var); | |
1667 | *var_handle = tmp_var; | |
705da579 | 1668 | var = *var_handle; |
73a93a32 JI |
1669 | *type_changed = 1; |
1670 | } | |
1671 | } | |
1672 | else | |
1673 | { | |
1674 | *type_changed = 0; | |
1675 | } | |
1676 | ||
1677 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1678 | } |
1679 | ||
30b28db1 AC |
1680 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
1681 | static struct value * | |
fba45db2 | 1682 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 1683 | { |
30b28db1 | 1684 | struct value *value; |
8b93c638 JM |
1685 | |
1686 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1687 | ||
8b93c638 JM |
1688 | return value; |
1689 | } | |
1690 | ||
8b93c638 JM |
1691 | /* Is this variable editable? Use the variable's type to make |
1692 | this determination. */ | |
1693 | static int | |
fba45db2 | 1694 | variable_editable (struct varobj *var) |
8b93c638 JM |
1695 | { |
1696 | return (*var->root->lang->variable_editable) (var); | |
1697 | } | |
1698 | ||
1699 | /* GDB already has a command called "value_of_variable". Sigh. */ | |
1700 | static char * | |
fba45db2 | 1701 | my_value_of_variable (struct varobj *var) |
8b93c638 | 1702 | { |
8756216b DP |
1703 | if (var->root->is_valid) |
1704 | return (*var->root->lang->value_of_variable) (var); | |
1705 | else | |
1706 | return NULL; | |
8b93c638 JM |
1707 | } |
1708 | ||
85265413 NR |
1709 | static char * |
1710 | value_get_print_value (struct value *value, enum varobj_display_formats format) | |
1711 | { | |
1712 | long dummy; | |
57e66780 DJ |
1713 | struct ui_file *stb; |
1714 | struct cleanup *old_chain; | |
85265413 | 1715 | char *thevalue; |
57e66780 DJ |
1716 | |
1717 | if (value == NULL) | |
1718 | return NULL; | |
1719 | ||
1720 | stb = mem_fileopen (); | |
1721 | old_chain = make_cleanup_ui_file_delete (stb); | |
1722 | ||
85265413 NR |
1723 | common_val_print (value, stb, format_code[(int) format], 1, 0, 0); |
1724 | thevalue = ui_file_xstrdup (stb, &dummy); | |
57e66780 | 1725 | |
85265413 NR |
1726 | do_cleanups (old_chain); |
1727 | return thevalue; | |
1728 | } | |
1729 | ||
acd65feb VP |
1730 | /* Return non-zero if changes in value of VAR |
1731 | must be detected and reported by -var-update. | |
1732 | Return zero is -var-update should never report | |
1733 | changes of such values. This makes sense for structures | |
1734 | (since the changes in children values will be reported separately), | |
1735 | or for artifical objects (like 'public' pseudo-field in C++). | |
1736 | ||
1737 | Return value of 0 means that gdb need not call value_fetch_lazy | |
1738 | for the value of this variable object. */ | |
8b93c638 | 1739 | static int |
b2c2bd75 | 1740 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
1741 | { |
1742 | int r; | |
1743 | struct type *type; | |
1744 | ||
1745 | if (CPLUS_FAKE_CHILD (var)) | |
1746 | return 0; | |
1747 | ||
6e2a9270 | 1748 | type = get_value_type (var); |
8b93c638 JM |
1749 | |
1750 | switch (TYPE_CODE (type)) | |
1751 | { | |
72330bd6 AC |
1752 | case TYPE_CODE_STRUCT: |
1753 | case TYPE_CODE_UNION: | |
1754 | case TYPE_CODE_ARRAY: | |
1755 | r = 0; | |
1756 | break; | |
8b93c638 | 1757 | |
72330bd6 AC |
1758 | default: |
1759 | r = 1; | |
8b93c638 JM |
1760 | } |
1761 | ||
1762 | return r; | |
1763 | } | |
1764 | ||
2024f65a VP |
1765 | /* Given the value and the type of a variable object, |
1766 | adjust the value and type to those necessary | |
1767 | for getting children of the variable object. | |
1768 | This includes dereferencing top-level references | |
1769 | to all types and dereferencing pointers to | |
1770 | structures. | |
1771 | ||
1772 | Both TYPE and *TYPE should be non-null. VALUE | |
1773 | can be null if we want to only translate type. | |
1774 | *VALUE can be null as well -- if the parent | |
1775 | value is not known. */ | |
1776 | static void | |
1777 | adjust_value_for_child_access (struct value **value, | |
1778 | struct type **type) | |
1779 | { | |
1780 | gdb_assert (type && *type); | |
1781 | ||
1782 | *type = check_typedef (*type); | |
1783 | ||
1784 | /* The type of value stored in varobj, that is passed | |
1785 | to us, is already supposed to be | |
1786 | reference-stripped. */ | |
1787 | ||
1788 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); | |
1789 | ||
1790 | /* Pointers to structures are treated just like | |
1791 | structures when accessing children. Don't | |
1792 | dererences pointers to other types. */ | |
1793 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) | |
1794 | { | |
1795 | struct type *target_type = get_target_type (*type); | |
1796 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
1797 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
1798 | { | |
1799 | if (value && *value) | |
1800 | gdb_value_ind (*value, value); | |
1801 | *type = target_type; | |
1802 | } | |
1803 | } | |
1804 | ||
1805 | /* The 'get_target_type' function calls check_typedef on | |
1806 | result, so we can immediately check type code. No | |
1807 | need to call check_typedef here. */ | |
1808 | } | |
1809 | ||
8b93c638 JM |
1810 | /* C */ |
1811 | static int | |
fba45db2 | 1812 | c_number_of_children (struct varobj *var) |
8b93c638 | 1813 | { |
2024f65a VP |
1814 | struct type *type = get_value_type (var); |
1815 | int children = 0; | |
8b93c638 | 1816 | struct type *target; |
8b93c638 | 1817 | |
2024f65a | 1818 | adjust_value_for_child_access (NULL, &type); |
8b93c638 | 1819 | target = get_target_type (type); |
8b93c638 JM |
1820 | |
1821 | switch (TYPE_CODE (type)) | |
1822 | { | |
1823 | case TYPE_CODE_ARRAY: | |
1824 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
72330bd6 | 1825 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) |
8b93c638 JM |
1826 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
1827 | else | |
74a44383 DJ |
1828 | /* If we don't know how many elements there are, don't display |
1829 | any. */ | |
1830 | children = 0; | |
8b93c638 JM |
1831 | break; |
1832 | ||
1833 | case TYPE_CODE_STRUCT: | |
1834 | case TYPE_CODE_UNION: | |
1835 | children = TYPE_NFIELDS (type); | |
1836 | break; | |
1837 | ||
1838 | case TYPE_CODE_PTR: | |
2024f65a VP |
1839 | /* The type here is a pointer to non-struct. Typically, pointers |
1840 | have one child, except for function ptrs, which have no children, | |
1841 | and except for void*, as we don't know what to show. | |
1842 | ||
0755e6c1 FN |
1843 | We can show char* so we allow it to be dereferenced. If you decide |
1844 | to test for it, please mind that a little magic is necessary to | |
1845 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
1846 | TYPE_NAME == "char" */ | |
2024f65a VP |
1847 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
1848 | || TYPE_CODE (target) == TYPE_CODE_VOID) | |
1849 | children = 0; | |
1850 | else | |
1851 | children = 1; | |
8b93c638 JM |
1852 | break; |
1853 | ||
1854 | default: | |
1855 | /* Other types have no children */ | |
1856 | break; | |
1857 | } | |
1858 | ||
1859 | return children; | |
1860 | } | |
1861 | ||
1862 | static char * | |
fba45db2 | 1863 | c_name_of_variable (struct varobj *parent) |
8b93c638 JM |
1864 | { |
1865 | return savestring (parent->name, strlen (parent->name)); | |
1866 | } | |
1867 | ||
bbec2603 VP |
1868 | /* Return the value of element TYPE_INDEX of a structure |
1869 | value VALUE. VALUE's type should be a structure, | |
1870 | or union, or a typedef to struct/union. | |
1871 | ||
1872 | Returns NULL if getting the value fails. Never throws. */ | |
1873 | static struct value * | |
1874 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 1875 | { |
bbec2603 VP |
1876 | struct value *result = NULL; |
1877 | volatile struct gdb_exception e; | |
8b93c638 | 1878 | |
bbec2603 VP |
1879 | struct type *type = value_type (value); |
1880 | type = check_typedef (type); | |
1881 | ||
1882 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
1883 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 1884 | |
bbec2603 VP |
1885 | TRY_CATCH (e, RETURN_MASK_ERROR) |
1886 | { | |
1887 | if (TYPE_FIELD_STATIC (type, type_index)) | |
1888 | result = value_static_field (type, type_index); | |
1889 | else | |
1890 | result = value_primitive_field (value, 0, type_index, type); | |
1891 | } | |
1892 | if (e.reason < 0) | |
1893 | { | |
1894 | return NULL; | |
1895 | } | |
1896 | else | |
1897 | { | |
1898 | return result; | |
1899 | } | |
1900 | } | |
1901 | ||
1902 | /* Obtain the information about child INDEX of the variable | |
1903 | object PARENT. | |
1904 | If CNAME is not null, sets *CNAME to the name of the child relative | |
1905 | to the parent. | |
1906 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
1907 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
1908 | ||
1909 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
1910 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
1911 | to NULL. */ | |
1912 | static void | |
1913 | c_describe_child (struct varobj *parent, int index, | |
1914 | char **cname, struct value **cvalue, struct type **ctype) | |
1915 | { | |
1916 | struct value *value = parent->value; | |
2024f65a | 1917 | struct type *type = get_value_type (parent); |
bbec2603 VP |
1918 | |
1919 | if (cname) | |
1920 | *cname = NULL; | |
1921 | if (cvalue) | |
1922 | *cvalue = NULL; | |
1923 | if (ctype) | |
1924 | *ctype = NULL; | |
1925 | ||
2024f65a | 1926 | adjust_value_for_child_access (&value, &type); |
bbec2603 | 1927 | |
8b93c638 JM |
1928 | switch (TYPE_CODE (type)) |
1929 | { | |
1930 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
1931 | if (cname) |
1932 | *cname = xstrprintf ("%d", index | |
1933 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
1934 | ||
1935 | if (cvalue && value) | |
1936 | { | |
1937 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
1938 | struct value *indval = | |
1939 | value_from_longest (builtin_type_int, (LONGEST) real_index); | |
1940 | gdb_value_subscript (value, indval, cvalue); | |
1941 | } | |
1942 | ||
1943 | if (ctype) | |
1944 | *ctype = get_target_type (type); | |
1945 | ||
8b93c638 JM |
1946 | break; |
1947 | ||
1948 | case TYPE_CODE_STRUCT: | |
1949 | case TYPE_CODE_UNION: | |
bbec2603 VP |
1950 | if (cname) |
1951 | { | |
1952 | char *string = TYPE_FIELD_NAME (type, index); | |
1953 | *cname = savestring (string, strlen (string)); | |
1954 | } | |
1955 | ||
1956 | if (cvalue && value) | |
1957 | { | |
1958 | /* For C, varobj index is the same as type index. */ | |
1959 | *cvalue = value_struct_element_index (value, index); | |
1960 | } | |
1961 | ||
1962 | if (ctype) | |
1963 | *ctype = TYPE_FIELD_TYPE (type, index); | |
1964 | ||
8b93c638 JM |
1965 | break; |
1966 | ||
1967 | case TYPE_CODE_PTR: | |
bbec2603 VP |
1968 | if (cname) |
1969 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 1970 | |
bbec2603 VP |
1971 | if (cvalue && value) |
1972 | gdb_value_ind (value, cvalue); | |
1973 | ||
2024f65a VP |
1974 | /* Don't use get_target_type because it calls |
1975 | check_typedef and here, we want to show the true | |
1976 | declared type of the variable. */ | |
bbec2603 | 1977 | if (ctype) |
2024f65a | 1978 | *ctype = TYPE_TARGET_TYPE (type); |
bbec2603 | 1979 | |
8b93c638 JM |
1980 | break; |
1981 | ||
1982 | default: | |
1983 | /* This should not happen */ | |
bbec2603 VP |
1984 | if (cname) |
1985 | *cname = xstrdup ("???"); | |
1986 | /* Don't set value and type, we don't know then. */ | |
8b93c638 | 1987 | } |
bbec2603 | 1988 | } |
8b93c638 | 1989 | |
bbec2603 VP |
1990 | static char * |
1991 | c_name_of_child (struct varobj *parent, int index) | |
1992 | { | |
1993 | char *name; | |
1994 | c_describe_child (parent, index, &name, NULL, NULL); | |
8b93c638 JM |
1995 | return name; |
1996 | } | |
1997 | ||
30b28db1 | 1998 | static struct value * |
fba45db2 | 1999 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 2000 | { |
5e572bb4 | 2001 | struct value *new_val = NULL; |
73a93a32 | 2002 | struct varobj *var = *var_handle; |
8b93c638 JM |
2003 | struct frame_info *fi; |
2004 | int within_scope; | |
2005 | ||
73a93a32 | 2006 | /* Only root variables can be updated... */ |
b2c2bd75 | 2007 | if (!is_root_p (var)) |
73a93a32 JI |
2008 | /* Not a root var */ |
2009 | return NULL; | |
2010 | ||
72330bd6 | 2011 | |
8b93c638 | 2012 | /* Determine whether the variable is still around. */ |
b20d8971 | 2013 | if (var->root->valid_block == NULL || var->root->use_selected_frame) |
8b93c638 JM |
2014 | within_scope = 1; |
2015 | else | |
2016 | { | |
e64d9b3d | 2017 | fi = frame_find_by_id (var->root->frame); |
8b93c638 JM |
2018 | within_scope = fi != NULL; |
2019 | /* FIXME: select_frame could fail */ | |
d2353924 NR |
2020 | if (fi) |
2021 | { | |
2022 | CORE_ADDR pc = get_frame_pc (fi); | |
2023 | if (pc < BLOCK_START (var->root->valid_block) || | |
2024 | pc >= BLOCK_END (var->root->valid_block)) | |
2025 | within_scope = 0; | |
2d43bda2 NR |
2026 | else |
2027 | select_frame (fi); | |
d2353924 | 2028 | } |
8b93c638 | 2029 | } |
72330bd6 | 2030 | |
8b93c638 JM |
2031 | if (within_scope) |
2032 | { | |
73a93a32 | 2033 | /* We need to catch errors here, because if evaluate |
85d93f1d VP |
2034 | expression fails we want to just return NULL. */ |
2035 | gdb_evaluate_expression (var->root->exp, &new_val); | |
8b93c638 JM |
2036 | return new_val; |
2037 | } | |
2038 | ||
2039 | return NULL; | |
2040 | } | |
2041 | ||
30b28db1 | 2042 | static struct value * |
fba45db2 | 2043 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2044 | { |
bbec2603 VP |
2045 | struct value *value = NULL; |
2046 | c_describe_child (parent, index, NULL, &value, NULL); | |
8b93c638 JM |
2047 | |
2048 | return value; | |
2049 | } | |
2050 | ||
2051 | static struct type * | |
fba45db2 | 2052 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2053 | { |
bbec2603 VP |
2054 | struct type *type = NULL; |
2055 | c_describe_child (parent, index, NULL, NULL, &type); | |
8b93c638 JM |
2056 | return type; |
2057 | } | |
2058 | ||
2059 | static int | |
fba45db2 | 2060 | c_variable_editable (struct varobj *var) |
8b93c638 | 2061 | { |
6e2a9270 | 2062 | switch (TYPE_CODE (get_value_type (var))) |
8b93c638 JM |
2063 | { |
2064 | case TYPE_CODE_STRUCT: | |
2065 | case TYPE_CODE_UNION: | |
2066 | case TYPE_CODE_ARRAY: | |
2067 | case TYPE_CODE_FUNC: | |
8b93c638 JM |
2068 | case TYPE_CODE_METHOD: |
2069 | return 0; | |
2070 | break; | |
2071 | ||
2072 | default: | |
2073 | return 1; | |
2074 | break; | |
2075 | } | |
2076 | } | |
2077 | ||
2078 | static char * | |
fba45db2 | 2079 | c_value_of_variable (struct varobj *var) |
8b93c638 | 2080 | { |
14b3d9c9 JB |
2081 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2082 | it will print out its children instead of "{...}". So we need to | |
2083 | catch that case explicitly. */ | |
2084 | struct type *type = get_type (var); | |
e64d9b3d | 2085 | |
14b3d9c9 JB |
2086 | /* Strip top-level references. */ |
2087 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2088 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2089 | ||
2090 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2091 | { |
2092 | case TYPE_CODE_STRUCT: | |
2093 | case TYPE_CODE_UNION: | |
2094 | return xstrdup ("{...}"); | |
2095 | /* break; */ | |
2096 | ||
2097 | case TYPE_CODE_ARRAY: | |
2098 | { | |
e64d9b3d | 2099 | char *number; |
b435e160 | 2100 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2101 | return (number); |
8b93c638 JM |
2102 | } |
2103 | /* break; */ | |
2104 | ||
2105 | default: | |
2106 | { | |
575bbeb6 KS |
2107 | if (var->value == NULL) |
2108 | { | |
2109 | /* This can happen if we attempt to get the value of a struct | |
2110 | member when the parent is an invalid pointer. This is an | |
2111 | error condition, so we should tell the caller. */ | |
2112 | return NULL; | |
2113 | } | |
2114 | else | |
2115 | { | |
b2c2bd75 | 2116 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2117 | gdb_assert (!value_lazy (var->value)); |
85265413 NR |
2118 | return value_get_print_value (var->value, var->format); |
2119 | } | |
e64d9b3d | 2120 | } |
8b93c638 JM |
2121 | } |
2122 | } | |
2123 | \f | |
2124 | ||
2125 | /* C++ */ | |
2126 | ||
2127 | static int | |
fba45db2 | 2128 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2129 | { |
2130 | struct type *type; | |
2131 | int children, dont_know; | |
2132 | ||
2133 | dont_know = 1; | |
2134 | children = 0; | |
2135 | ||
2136 | if (!CPLUS_FAKE_CHILD (var)) | |
2137 | { | |
2024f65a VP |
2138 | type = get_value_type (var); |
2139 | adjust_value_for_child_access (NULL, &type); | |
8b93c638 JM |
2140 | |
2141 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2142 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2143 | { |
2144 | int kids[3]; | |
2145 | ||
2146 | cplus_class_num_children (type, kids); | |
2147 | if (kids[v_public] != 0) | |
2148 | children++; | |
2149 | if (kids[v_private] != 0) | |
2150 | children++; | |
2151 | if (kids[v_protected] != 0) | |
2152 | children++; | |
2153 | ||
2154 | /* Add any baseclasses */ | |
2155 | children += TYPE_N_BASECLASSES (type); | |
2156 | dont_know = 0; | |
2157 | ||
2158 | /* FIXME: save children in var */ | |
2159 | } | |
2160 | } | |
2161 | else | |
2162 | { | |
2163 | int kids[3]; | |
2164 | ||
2024f65a VP |
2165 | type = get_value_type (var->parent); |
2166 | adjust_value_for_child_access (NULL, &type); | |
8b93c638 JM |
2167 | |
2168 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2169 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2170 | children = kids[v_public]; |
6e382aa3 | 2171 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2172 | children = kids[v_private]; |
2173 | else | |
2174 | children = kids[v_protected]; | |
2175 | dont_know = 0; | |
2176 | } | |
2177 | ||
2178 | if (dont_know) | |
2179 | children = c_number_of_children (var); | |
2180 | ||
2181 | return children; | |
2182 | } | |
2183 | ||
2184 | /* Compute # of public, private, and protected variables in this class. | |
2185 | That means we need to descend into all baseclasses and find out | |
2186 | how many are there, too. */ | |
2187 | static void | |
1669605f | 2188 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2189 | { |
2190 | int i; | |
2191 | ||
2192 | children[v_public] = 0; | |
2193 | children[v_private] = 0; | |
2194 | children[v_protected] = 0; | |
2195 | ||
2196 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2197 | { | |
2198 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2199 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2200 | continue; |
2201 | ||
2202 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2203 | children[v_protected]++; | |
2204 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2205 | children[v_private]++; | |
2206 | else | |
2207 | children[v_public]++; | |
2208 | } | |
2209 | } | |
2210 | ||
2211 | static char * | |
fba45db2 | 2212 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2213 | { |
2214 | return c_name_of_variable (parent); | |
2215 | } | |
2216 | ||
2024f65a VP |
2217 | enum accessibility { private_field, protected_field, public_field }; |
2218 | ||
2219 | /* Check if field INDEX of TYPE has the specified accessibility. | |
2220 | Return 0 if so and 1 otherwise. */ | |
2221 | static int | |
2222 | match_accessibility (struct type *type, int index, enum accessibility acc) | |
8b93c638 | 2223 | { |
2024f65a VP |
2224 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
2225 | return 1; | |
2226 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) | |
2227 | return 1; | |
2228 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) | |
2229 | && !TYPE_FIELD_PROTECTED (type, index)) | |
2230 | return 1; | |
2231 | else | |
2232 | return 0; | |
2233 | } | |
2234 | ||
2235 | static void | |
2236 | cplus_describe_child (struct varobj *parent, int index, | |
2237 | char **cname, struct value **cvalue, struct type **ctype) | |
2238 | { | |
2239 | char *name = 0; | |
2240 | struct value *value; | |
8b93c638 | 2241 | struct type *type; |
8b93c638 | 2242 | |
2024f65a VP |
2243 | if (cname) |
2244 | *cname = NULL; | |
2245 | if (cvalue) | |
2246 | *cvalue = NULL; | |
2247 | if (ctype) | |
2248 | *ctype = NULL; | |
2249 | ||
2250 | ||
8b93c638 JM |
2251 | if (CPLUS_FAKE_CHILD (parent)) |
2252 | { | |
2024f65a VP |
2253 | value = parent->parent->value; |
2254 | type = get_value_type (parent->parent); | |
8b93c638 JM |
2255 | } |
2256 | else | |
2024f65a VP |
2257 | { |
2258 | value = parent->value; | |
2259 | type = get_value_type (parent); | |
2260 | } | |
8b93c638 | 2261 | |
2024f65a VP |
2262 | adjust_value_for_child_access (&value, &type); |
2263 | ||
2264 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
2265 | || TYPE_CODE (type) == TYPE_CODE_STRUCT) | |
8b93c638 | 2266 | { |
8b93c638 JM |
2267 | if (CPLUS_FAKE_CHILD (parent)) |
2268 | { | |
6e382aa3 JJ |
2269 | /* The fields of the class type are ordered as they |
2270 | appear in the class. We are given an index for a | |
2271 | particular access control type ("public","protected", | |
2272 | or "private"). We must skip over fields that don't | |
2273 | have the access control we are looking for to properly | |
2274 | find the indexed field. */ | |
2275 | int type_index = TYPE_N_BASECLASSES (type); | |
2024f65a | 2276 | enum accessibility acc = public_field; |
6e382aa3 | 2277 | if (strcmp (parent->name, "private") == 0) |
2024f65a | 2278 | acc = private_field; |
6e382aa3 | 2279 | else if (strcmp (parent->name, "protected") == 0) |
2024f65a VP |
2280 | acc = protected_field; |
2281 | ||
2282 | while (index >= 0) | |
6e382aa3 | 2283 | { |
2024f65a VP |
2284 | if (TYPE_VPTR_BASETYPE (type) == type |
2285 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2286 | ; /* ignore vptr */ | |
2287 | else if (match_accessibility (type, type_index, acc)) | |
6e382aa3 JJ |
2288 | --index; |
2289 | ++type_index; | |
6e382aa3 | 2290 | } |
2024f65a VP |
2291 | --type_index; |
2292 | ||
2293 | if (cname) | |
2294 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); | |
2295 | ||
2296 | if (cvalue && value) | |
2297 | *cvalue = value_struct_element_index (value, type_index); | |
2298 | ||
2299 | if (ctype) | |
2300 | *ctype = TYPE_FIELD_TYPE (type, type_index); | |
2301 | } | |
2302 | else if (index < TYPE_N_BASECLASSES (type)) | |
2303 | { | |
2304 | /* This is a baseclass. */ | |
2305 | if (cname) | |
2306 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); | |
2307 | ||
2308 | if (cvalue && value) | |
6e382aa3 | 2309 | { |
2024f65a | 2310 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
6e382aa3 JJ |
2311 | } |
2312 | ||
2024f65a VP |
2313 | if (ctype) |
2314 | { | |
2315 | *ctype = TYPE_FIELD_TYPE (type, index); | |
2316 | } | |
8b93c638 | 2317 | } |
8b93c638 JM |
2318 | else |
2319 | { | |
2024f65a | 2320 | char *access = 0; |
6e382aa3 | 2321 | int children[3]; |
2024f65a | 2322 | cplus_class_num_children (type, children); |
6e382aa3 | 2323 | |
8b93c638 | 2324 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2325 | only be "public", "private", or "protected" |
2326 | ||
2327 | The special "fake" children are always output by varobj in | |
2328 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2329 | index -= TYPE_N_BASECLASSES (type); |
2330 | switch (index) | |
2331 | { | |
2332 | case 0: | |
6e382aa3 | 2333 | if (children[v_public] > 0) |
2024f65a | 2334 | access = "public"; |
6e382aa3 | 2335 | else if (children[v_private] > 0) |
2024f65a | 2336 | access = "private"; |
6e382aa3 | 2337 | else |
2024f65a | 2338 | access = "protected"; |
6e382aa3 | 2339 | break; |
8b93c638 | 2340 | case 1: |
6e382aa3 | 2341 | if (children[v_public] > 0) |
8b93c638 | 2342 | { |
6e382aa3 | 2343 | if (children[v_private] > 0) |
2024f65a | 2344 | access = "private"; |
6e382aa3 | 2345 | else |
2024f65a | 2346 | access = "protected"; |
8b93c638 | 2347 | } |
6e382aa3 | 2348 | else if (children[v_private] > 0) |
2024f65a | 2349 | access = "protected"; |
6e382aa3 | 2350 | break; |
8b93c638 | 2351 | case 2: |
6e382aa3 | 2352 | /* Must be protected */ |
2024f65a | 2353 | access = "protected"; |
6e382aa3 | 2354 | break; |
8b93c638 JM |
2355 | default: |
2356 | /* error! */ | |
2357 | break; | |
2358 | } | |
2024f65a VP |
2359 | |
2360 | if (cname) | |
2361 | *cname = xstrdup (access); | |
8b93c638 | 2362 | |
2024f65a VP |
2363 | /* Value and type are null here. */ |
2364 | } | |
8b93c638 | 2365 | } |
8b93c638 JM |
2366 | else |
2367 | { | |
2024f65a VP |
2368 | c_describe_child (parent, index, cname, cvalue, ctype); |
2369 | } | |
2370 | } | |
8b93c638 | 2371 | |
2024f65a VP |
2372 | static char * |
2373 | cplus_name_of_child (struct varobj *parent, int index) | |
2374 | { | |
2375 | char *name = NULL; | |
2376 | cplus_describe_child (parent, index, &name, NULL, NULL); | |
8b93c638 JM |
2377 | return name; |
2378 | } | |
2379 | ||
30b28db1 | 2380 | static struct value * |
fba45db2 | 2381 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2382 | { |
73a93a32 | 2383 | return c_value_of_root (var_handle); |
8b93c638 JM |
2384 | } |
2385 | ||
30b28db1 | 2386 | static struct value * |
fba45db2 | 2387 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2388 | { |
2024f65a VP |
2389 | struct value *value = NULL; |
2390 | cplus_describe_child (parent, index, NULL, &value, NULL); | |
8b93c638 JM |
2391 | return value; |
2392 | } | |
2393 | ||
2394 | static struct type * | |
fba45db2 | 2395 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2396 | { |
2024f65a VP |
2397 | struct type *type = NULL; |
2398 | cplus_describe_child (parent, index, NULL, NULL, &type); | |
8b93c638 JM |
2399 | return type; |
2400 | } | |
2401 | ||
2402 | static int | |
fba45db2 | 2403 | cplus_variable_editable (struct varobj *var) |
8b93c638 JM |
2404 | { |
2405 | if (CPLUS_FAKE_CHILD (var)) | |
2406 | return 0; | |
2407 | ||
2408 | return c_variable_editable (var); | |
2409 | } | |
2410 | ||
2411 | static char * | |
fba45db2 | 2412 | cplus_value_of_variable (struct varobj *var) |
8b93c638 JM |
2413 | { |
2414 | ||
2415 | /* If we have one of our special types, don't print out | |
2416 | any value. */ | |
2417 | if (CPLUS_FAKE_CHILD (var)) | |
2418 | return xstrdup (""); | |
2419 | ||
2420 | return c_value_of_variable (var); | |
2421 | } | |
2422 | \f | |
2423 | /* Java */ | |
2424 | ||
2425 | static int | |
fba45db2 | 2426 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2427 | { |
2428 | return cplus_number_of_children (var); | |
2429 | } | |
2430 | ||
2431 | static char * | |
fba45db2 | 2432 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2433 | { |
2434 | char *p, *name; | |
2435 | ||
2436 | name = cplus_name_of_variable (parent); | |
2437 | /* If the name has "-" in it, it is because we | |
2438 | needed to escape periods in the name... */ | |
2439 | p = name; | |
2440 | ||
2441 | while (*p != '\000') | |
2442 | { | |
2443 | if (*p == '-') | |
2444 | *p = '.'; | |
2445 | p++; | |
2446 | } | |
2447 | ||
2448 | return name; | |
2449 | } | |
2450 | ||
2451 | static char * | |
fba45db2 | 2452 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2453 | { |
2454 | char *name, *p; | |
2455 | ||
2456 | name = cplus_name_of_child (parent, index); | |
2457 | /* Escape any periods in the name... */ | |
2458 | p = name; | |
2459 | ||
2460 | while (*p != '\000') | |
2461 | { | |
2462 | if (*p == '.') | |
2463 | *p = '-'; | |
2464 | p++; | |
2465 | } | |
2466 | ||
2467 | return name; | |
2468 | } | |
2469 | ||
30b28db1 | 2470 | static struct value * |
fba45db2 | 2471 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2472 | { |
73a93a32 | 2473 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2474 | } |
2475 | ||
30b28db1 | 2476 | static struct value * |
fba45db2 | 2477 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2478 | { |
2479 | return cplus_value_of_child (parent, index); | |
2480 | } | |
2481 | ||
2482 | static struct type * | |
fba45db2 | 2483 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2484 | { |
2485 | return cplus_type_of_child (parent, index); | |
2486 | } | |
2487 | ||
2488 | static int | |
fba45db2 | 2489 | java_variable_editable (struct varobj *var) |
8b93c638 JM |
2490 | { |
2491 | return cplus_variable_editable (var); | |
2492 | } | |
2493 | ||
2494 | static char * | |
fba45db2 | 2495 | java_value_of_variable (struct varobj *var) |
8b93c638 JM |
2496 | { |
2497 | return cplus_value_of_variable (var); | |
2498 | } | |
2499 | \f | |
2500 | extern void _initialize_varobj (void); | |
2501 | void | |
2502 | _initialize_varobj (void) | |
2503 | { | |
2504 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2505 | ||
2506 | varobj_table = xmalloc (sizeof_table); | |
2507 | memset (varobj_table, 0, sizeof_table); | |
2508 | ||
85c07804 AC |
2509 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2510 | &varobjdebug, _("\ | |
2511 | Set varobj debugging."), _("\ | |
2512 | Show varobj debugging."), _("\ | |
2513 | When non-zero, varobj debugging is enabled."), | |
2514 | NULL, | |
920d2a44 | 2515 | show_varobjdebug, |
85c07804 | 2516 | &setlist, &showlist); |
8b93c638 | 2517 | } |
8756216b DP |
2518 | |
2519 | /* Invalidate the varobjs that are tied to locals and re-create the ones that | |
2520 | are defined on globals. | |
2521 | Invalidated varobjs will be always printed in_scope="invalid". */ | |
2522 | void | |
2523 | varobj_invalidate (void) | |
2524 | { | |
2525 | struct varobj **all_rootvarobj; | |
2526 | struct varobj **varp; | |
2527 | ||
2528 | if (varobj_list (&all_rootvarobj) > 0) | |
2529 | { | |
2530 | varp = all_rootvarobj; | |
2531 | while (*varp != NULL) | |
2532 | { | |
2533 | /* global var must be re-evaluated. */ | |
2534 | if ((*varp)->root->valid_block == NULL) | |
2535 | { | |
2536 | struct varobj *tmp_var; | |
2537 | ||
2538 | /* Try to create a varobj with same expression. If we succeed replace | |
2539 | the old varobj, otherwise invalidate it. */ | |
2540 | tmp_var = varobj_create (NULL, (*varp)->name, (CORE_ADDR) 0, USE_CURRENT_FRAME); | |
2541 | if (tmp_var != NULL) | |
2542 | { | |
2543 | tmp_var->obj_name = xstrdup ((*varp)->obj_name); | |
2544 | varobj_delete (*varp, NULL, 0); | |
2545 | install_variable (tmp_var); | |
2546 | } | |
2547 | else | |
2548 | (*varp)->root->is_valid = 0; | |
2549 | } | |
2550 | else /* locals must be invalidated. */ | |
2551 | (*varp)->root->is_valid = 0; | |
2552 | ||
2553 | varp++; | |
2554 | } | |
2555 | xfree (all_rootvarobj); | |
2556 | } | |
2557 | return; | |
2558 | } |