Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
48426bc2 | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006 |
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" | |
a6c442d8 MK |
29 | |
30 | #include "gdb_assert.h" | |
b66d6d2e | 31 | #include "gdb_string.h" |
8b93c638 JM |
32 | |
33 | #include "varobj.h" | |
34 | ||
35 | /* Non-zero if we want to see trace of varobj level stuff. */ | |
36 | ||
37 | int varobjdebug = 0; | |
920d2a44 AC |
38 | static void |
39 | show_varobjdebug (struct ui_file *file, int from_tty, | |
40 | struct cmd_list_element *c, const char *value) | |
41 | { | |
42 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
43 | } | |
8b93c638 JM |
44 | |
45 | /* String representations of gdb's format codes */ | |
46 | char *varobj_format_string[] = | |
72330bd6 | 47 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
48 | |
49 | /* String representations of gdb's known languages */ | |
72330bd6 | 50 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
51 | |
52 | /* Data structures */ | |
53 | ||
54 | /* Every root variable has one of these structures saved in its | |
55 | varobj. Members which must be free'd are noted. */ | |
56 | struct varobj_root | |
72330bd6 | 57 | { |
8b93c638 | 58 | |
72330bd6 AC |
59 | /* Alloc'd expression for this parent. */ |
60 | struct expression *exp; | |
8b93c638 | 61 | |
72330bd6 AC |
62 | /* Block for which this expression is valid */ |
63 | struct block *valid_block; | |
8b93c638 | 64 | |
72330bd6 | 65 | /* The frame for this expression */ |
e64d9b3d | 66 | struct frame_id frame; |
8b93c638 | 67 | |
72330bd6 AC |
68 | /* If 1, "update" always recomputes the frame & valid block |
69 | using the currently selected frame. */ | |
70 | int use_selected_frame; | |
73a93a32 | 71 | |
72330bd6 AC |
72 | /* Language info for this variable and its children */ |
73 | struct language_specific *lang; | |
8b93c638 | 74 | |
72330bd6 AC |
75 | /* The varobj for this root node. */ |
76 | struct varobj *rootvar; | |
8b93c638 | 77 | |
72330bd6 AC |
78 | /* Next root variable */ |
79 | struct varobj_root *next; | |
80 | }; | |
8b93c638 JM |
81 | |
82 | /* Every variable in the system has a structure of this type defined | |
83 | for it. This structure holds all information necessary to manipulate | |
84 | a particular object variable. Members which must be freed are noted. */ | |
85 | struct varobj | |
72330bd6 | 86 | { |
8b93c638 | 87 | |
72330bd6 AC |
88 | /* Alloc'd name of the variable for this object.. If this variable is a |
89 | child, then this name will be the child's source name. | |
90 | (bar, not foo.bar) */ | |
91 | /* NOTE: This is the "expression" */ | |
92 | char *name; | |
8b93c638 | 93 | |
72330bd6 AC |
94 | /* The alloc'd name for this variable's object. This is here for |
95 | convenience when constructing this object's children. */ | |
96 | char *obj_name; | |
8b93c638 | 97 | |
72330bd6 AC |
98 | /* Index of this variable in its parent or -1 */ |
99 | int index; | |
8b93c638 | 100 | |
72330bd6 AC |
101 | /* The type of this variable. This may NEVER be NULL. */ |
102 | struct type *type; | |
8b93c638 | 103 | |
acd65feb VP |
104 | /* The value of this expression or subexpression. This may be NULL. |
105 | Invariant: if type_changeable (this) is non-zero, the value is either | |
106 | NULL, or not lazy. */ | |
30b28db1 | 107 | struct value *value; |
8b93c638 | 108 | |
72330bd6 AC |
109 | /* Did an error occur evaluating the expression or getting its value? */ |
110 | int error; | |
8b93c638 | 111 | |
72330bd6 AC |
112 | /* The number of (immediate) children this variable has */ |
113 | int num_children; | |
8b93c638 | 114 | |
72330bd6 AC |
115 | /* If this object is a child, this points to its immediate parent. */ |
116 | struct varobj *parent; | |
8b93c638 | 117 | |
72330bd6 AC |
118 | /* A list of this object's children */ |
119 | struct varobj_child *children; | |
8b93c638 | 120 | |
72330bd6 AC |
121 | /* Description of the root variable. Points to root variable for children. */ |
122 | struct varobj_root *root; | |
8b93c638 | 123 | |
72330bd6 AC |
124 | /* The format of the output for this object */ |
125 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
126 | |
127 | /* Was this variable updated via a varobj_set_value operation */ | |
128 | int updated; | |
72330bd6 | 129 | }; |
8b93c638 JM |
130 | |
131 | /* Every variable keeps a linked list of its children, described | |
132 | by the following structure. */ | |
133 | /* FIXME: Deprecated. All should use vlist instead */ | |
134 | ||
135 | struct varobj_child | |
72330bd6 | 136 | { |
8b93c638 | 137 | |
72330bd6 AC |
138 | /* Pointer to the child's data */ |
139 | struct varobj *child; | |
8b93c638 | 140 | |
72330bd6 AC |
141 | /* Pointer to the next child */ |
142 | struct varobj_child *next; | |
143 | }; | |
8b93c638 JM |
144 | |
145 | /* A stack of varobjs */ | |
146 | /* FIXME: Deprecated. All should use vlist instead */ | |
147 | ||
148 | struct vstack | |
72330bd6 AC |
149 | { |
150 | struct varobj *var; | |
151 | struct vstack *next; | |
152 | }; | |
8b93c638 JM |
153 | |
154 | struct cpstack | |
72330bd6 AC |
155 | { |
156 | char *name; | |
157 | struct cpstack *next; | |
158 | }; | |
8b93c638 JM |
159 | |
160 | /* A list of varobjs */ | |
161 | ||
162 | struct vlist | |
72330bd6 AC |
163 | { |
164 | struct varobj *var; | |
165 | struct vlist *next; | |
166 | }; | |
8b93c638 JM |
167 | |
168 | /* Private function prototypes */ | |
169 | ||
170 | /* Helper functions for the above subcommands. */ | |
171 | ||
a14ed312 | 172 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 173 | |
a14ed312 KB |
174 | static void delete_variable_1 (struct cpstack **, int *, |
175 | struct varobj *, int, int); | |
8b93c638 | 176 | |
a14ed312 | 177 | static int install_variable (struct varobj *); |
8b93c638 | 178 | |
a14ed312 | 179 | static void uninstall_variable (struct varobj *); |
8b93c638 | 180 | |
a14ed312 | 181 | static struct varobj *child_exists (struct varobj *, char *); |
8b93c638 | 182 | |
a14ed312 | 183 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 184 | |
a14ed312 | 185 | static void save_child_in_parent (struct varobj *, struct varobj *); |
8b93c638 | 186 | |
a14ed312 | 187 | static void remove_child_from_parent (struct varobj *, struct varobj *); |
8b93c638 JM |
188 | |
189 | /* Utility routines */ | |
190 | ||
a14ed312 | 191 | static struct varobj *new_variable (void); |
8b93c638 | 192 | |
a14ed312 | 193 | static struct varobj *new_root_variable (void); |
8b93c638 | 194 | |
a14ed312 | 195 | static void free_variable (struct varobj *var); |
8b93c638 | 196 | |
74b7792f AC |
197 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
198 | ||
a14ed312 | 199 | static struct type *get_type (struct varobj *var); |
8b93c638 | 200 | |
a14ed312 | 201 | static struct type *get_type_deref (struct varobj *var); |
8b93c638 | 202 | |
a14ed312 | 203 | static struct type *get_target_type (struct type *); |
8b93c638 | 204 | |
a14ed312 | 205 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 206 | |
a14ed312 | 207 | static void vpush (struct vstack **pstack, struct varobj *var); |
8b93c638 | 208 | |
a14ed312 | 209 | static struct varobj *vpop (struct vstack **pstack); |
8b93c638 | 210 | |
a14ed312 | 211 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 212 | |
a14ed312 | 213 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 214 | |
acd65feb VP |
215 | static int install_new_value (struct varobj *var, struct value *value, |
216 | int initial); | |
217 | ||
8b93c638 JM |
218 | /* Language-specific routines. */ |
219 | ||
a14ed312 | 220 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 221 | |
a14ed312 | 222 | static int number_of_children (struct varobj *); |
8b93c638 | 223 | |
a14ed312 | 224 | static char *name_of_variable (struct varobj *); |
8b93c638 | 225 | |
a14ed312 | 226 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 227 | |
30b28db1 | 228 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 229 | |
30b28db1 | 230 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 231 | |
a14ed312 | 232 | static int variable_editable (struct varobj *var); |
8b93c638 | 233 | |
a14ed312 | 234 | static char *my_value_of_variable (struct varobj *var); |
8b93c638 | 235 | |
a14ed312 | 236 | static int type_changeable (struct varobj *var); |
8b93c638 JM |
237 | |
238 | /* C implementation */ | |
239 | ||
a14ed312 | 240 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 241 | |
a14ed312 | 242 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 243 | |
a14ed312 | 244 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 245 | |
30b28db1 | 246 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 247 | |
30b28db1 | 248 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 249 | |
a14ed312 | 250 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 251 | |
a14ed312 | 252 | static int c_variable_editable (struct varobj *var); |
8b93c638 | 253 | |
a14ed312 | 254 | static char *c_value_of_variable (struct varobj *var); |
8b93c638 JM |
255 | |
256 | /* C++ implementation */ | |
257 | ||
a14ed312 | 258 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 259 | |
a14ed312 | 260 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 261 | |
a14ed312 | 262 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 263 | |
a14ed312 | 264 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 265 | |
30b28db1 | 266 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 267 | |
30b28db1 | 268 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 269 | |
a14ed312 | 270 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 271 | |
a14ed312 | 272 | static int cplus_variable_editable (struct varobj *var); |
8b93c638 | 273 | |
a14ed312 | 274 | static char *cplus_value_of_variable (struct varobj *var); |
8b93c638 JM |
275 | |
276 | /* Java implementation */ | |
277 | ||
a14ed312 | 278 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 279 | |
a14ed312 | 280 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 281 | |
a14ed312 | 282 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 283 | |
30b28db1 | 284 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 285 | |
30b28db1 | 286 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 287 | |
a14ed312 | 288 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 289 | |
a14ed312 | 290 | static int java_variable_editable (struct varobj *var); |
8b93c638 | 291 | |
a14ed312 | 292 | static char *java_value_of_variable (struct varobj *var); |
8b93c638 JM |
293 | |
294 | /* The language specific vector */ | |
295 | ||
296 | struct language_specific | |
72330bd6 | 297 | { |
8b93c638 | 298 | |
72330bd6 AC |
299 | /* The language of this variable */ |
300 | enum varobj_languages language; | |
8b93c638 | 301 | |
72330bd6 AC |
302 | /* The number of children of PARENT. */ |
303 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 304 | |
72330bd6 AC |
305 | /* The name (expression) of a root varobj. */ |
306 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 307 | |
72330bd6 AC |
308 | /* The name of the INDEX'th child of PARENT. */ |
309 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 310 | |
30b28db1 AC |
311 | /* The ``struct value *'' of the root variable ROOT. */ |
312 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 313 | |
30b28db1 AC |
314 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
315 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 316 | |
72330bd6 AC |
317 | /* The type of the INDEX'th child of PARENT. */ |
318 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 319 | |
72330bd6 AC |
320 | /* Is VAR editable? */ |
321 | int (*variable_editable) (struct varobj * var); | |
8b93c638 | 322 | |
72330bd6 AC |
323 | /* The current value of VAR. */ |
324 | char *(*value_of_variable) (struct varobj * var); | |
325 | }; | |
8b93c638 JM |
326 | |
327 | /* Array of known source language routines. */ | |
328 | static struct language_specific | |
72330bd6 | 329 | languages[vlang_end][sizeof (struct language_specific)] = { |
8b93c638 JM |
330 | /* Unknown (try treating as C */ |
331 | { | |
72330bd6 AC |
332 | vlang_unknown, |
333 | c_number_of_children, | |
334 | c_name_of_variable, | |
335 | c_name_of_child, | |
336 | c_value_of_root, | |
337 | c_value_of_child, | |
338 | c_type_of_child, | |
339 | c_variable_editable, | |
340 | c_value_of_variable} | |
8b93c638 JM |
341 | , |
342 | /* C */ | |
343 | { | |
72330bd6 AC |
344 | vlang_c, |
345 | c_number_of_children, | |
346 | c_name_of_variable, | |
347 | c_name_of_child, | |
348 | c_value_of_root, | |
349 | c_value_of_child, | |
350 | c_type_of_child, | |
351 | c_variable_editable, | |
352 | c_value_of_variable} | |
8b93c638 JM |
353 | , |
354 | /* C++ */ | |
355 | { | |
72330bd6 AC |
356 | vlang_cplus, |
357 | cplus_number_of_children, | |
358 | cplus_name_of_variable, | |
359 | cplus_name_of_child, | |
360 | cplus_value_of_root, | |
361 | cplus_value_of_child, | |
362 | cplus_type_of_child, | |
363 | cplus_variable_editable, | |
364 | cplus_value_of_variable} | |
8b93c638 JM |
365 | , |
366 | /* Java */ | |
367 | { | |
72330bd6 AC |
368 | vlang_java, |
369 | java_number_of_children, | |
370 | java_name_of_variable, | |
371 | java_name_of_child, | |
372 | java_value_of_root, | |
373 | java_value_of_child, | |
374 | java_type_of_child, | |
375 | java_variable_editable, | |
376 | java_value_of_variable} | |
8b93c638 JM |
377 | }; |
378 | ||
379 | /* A little convenience enum for dealing with C++/Java */ | |
380 | enum vsections | |
72330bd6 AC |
381 | { |
382 | v_public = 0, v_private, v_protected | |
383 | }; | |
8b93c638 JM |
384 | |
385 | /* Private data */ | |
386 | ||
387 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 388 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
389 | |
390 | /* Header of the list of root variable objects */ | |
391 | static struct varobj_root *rootlist; | |
392 | static int rootcount = 0; /* number of root varobjs in the list */ | |
393 | ||
394 | /* Prime number indicating the number of buckets in the hash table */ | |
395 | /* A prime large enough to avoid too many colisions */ | |
396 | #define VAROBJ_TABLE_SIZE 227 | |
397 | ||
398 | /* Pointer to the varobj hash table (built at run time) */ | |
399 | static struct vlist **varobj_table; | |
400 | ||
8b93c638 JM |
401 | /* Is the variable X one of our "fake" children? */ |
402 | #define CPLUS_FAKE_CHILD(x) \ | |
403 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
404 | \f | |
405 | ||
406 | /* API Implementation */ | |
407 | ||
408 | /* Creates a varobj (not its children) */ | |
409 | ||
7d8547c9 AC |
410 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
411 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
412 | ||
413 | static struct frame_info * | |
414 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
415 | { | |
416 | struct frame_info *frame = NULL; | |
417 | ||
418 | if (frame_addr == (CORE_ADDR) 0) | |
419 | return NULL; | |
420 | ||
421 | while (1) | |
422 | { | |
423 | frame = get_prev_frame (frame); | |
424 | if (frame == NULL) | |
425 | return NULL; | |
eb5492fa | 426 | if (get_frame_base_address (frame) == frame_addr) |
7d8547c9 AC |
427 | return frame; |
428 | } | |
429 | } | |
430 | ||
8b93c638 JM |
431 | struct varobj * |
432 | varobj_create (char *objname, | |
72330bd6 | 433 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
434 | { |
435 | struct varobj *var; | |
2c67cb8b AC |
436 | struct frame_info *fi; |
437 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
438 | struct block *block; |
439 | struct cleanup *old_chain; | |
440 | ||
441 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
442 | var = new_root_variable (); | |
74b7792f | 443 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
444 | |
445 | if (expression != NULL) | |
446 | { | |
447 | char *p; | |
448 | enum varobj_languages lang; | |
acd65feb | 449 | struct value *value; |
8b93c638 JM |
450 | |
451 | /* Parse and evaluate the expression, filling in as much | |
452 | of the variable's data as possible */ | |
453 | ||
454 | /* Allow creator to specify context of variable */ | |
72330bd6 | 455 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
6e7f8b9c | 456 | fi = deprecated_selected_frame; |
8b93c638 | 457 | else |
7d8547c9 AC |
458 | /* FIXME: cagney/2002-11-23: This code should be doing a |
459 | lookup using the frame ID and not just the frame's | |
460 | ``address''. This, of course, means an interface change. | |
461 | However, with out that interface change ISAs, such as the | |
462 | ia64 with its two stacks, won't work. Similar goes for the | |
463 | case where there is a frameless function. */ | |
8b93c638 JM |
464 | fi = find_frame_addr_in_frame_chain (frame); |
465 | ||
73a93a32 JI |
466 | /* frame = -2 means always use selected frame */ |
467 | if (type == USE_SELECTED_FRAME) | |
468 | var->root->use_selected_frame = 1; | |
469 | ||
8b93c638 JM |
470 | block = NULL; |
471 | if (fi != NULL) | |
ae767bfb | 472 | block = get_frame_block (fi, 0); |
8b93c638 JM |
473 | |
474 | p = expression; | |
475 | innermost_block = NULL; | |
73a93a32 JI |
476 | /* Wrap the call to parse expression, so we can |
477 | return a sensible error. */ | |
478 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
479 | { | |
480 | return NULL; | |
481 | } | |
8b93c638 JM |
482 | |
483 | /* Don't allow variables to be created for types. */ | |
484 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
485 | { | |
486 | do_cleanups (old_chain); | |
bc8332bb AC |
487 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
488 | " as an expression.\n"); | |
8b93c638 JM |
489 | return NULL; |
490 | } | |
491 | ||
492 | var->format = variable_default_display (var); | |
493 | var->root->valid_block = innermost_block; | |
494 | var->name = savestring (expression, strlen (expression)); | |
495 | ||
496 | /* When the frame is different from the current frame, | |
497 | we must select the appropriate frame before parsing | |
498 | the expression, otherwise the value will not be current. | |
499 | Since select_frame is so benign, just call it for all cases. */ | |
500 | if (fi != NULL) | |
501 | { | |
7a424e99 | 502 | var->root->frame = get_frame_id (fi); |
6e7f8b9c | 503 | old_fi = deprecated_selected_frame; |
0f7d239c | 504 | select_frame (fi); |
8b93c638 JM |
505 | } |
506 | ||
507 | /* We definitively need to catch errors here. | |
508 | If evaluate_expression succeeds we got the value we wanted. | |
509 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb VP |
510 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
511 | /* Error getting the value. Try to at least get the | |
512 | right type. */ | |
513 | value = evaluate_type (var->root->exp); | |
514 | ||
515 | release_value (value); | |
516 | ||
517 | var->type = value_type (value); | |
8b93c638 | 518 | |
acd65feb | 519 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
520 | |
521 | /* Set language info */ | |
522 | lang = variable_language (var); | |
523 | var->root->lang = languages[lang]; | |
524 | ||
525 | /* Set ourselves as our root */ | |
526 | var->root->rootvar = var; | |
527 | ||
528 | /* Reset the selected frame */ | |
529 | if (fi != NULL) | |
0f7d239c | 530 | select_frame (old_fi); |
8b93c638 JM |
531 | } |
532 | ||
73a93a32 JI |
533 | /* If the variable object name is null, that means this |
534 | is a temporary variable, so don't install it. */ | |
535 | ||
536 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 JM |
537 | { |
538 | var->obj_name = savestring (objname, strlen (objname)); | |
539 | ||
540 | /* If a varobj name is duplicated, the install will fail so | |
541 | we must clenup */ | |
542 | if (!install_variable (var)) | |
543 | { | |
544 | do_cleanups (old_chain); | |
545 | return NULL; | |
546 | } | |
547 | } | |
548 | ||
549 | discard_cleanups (old_chain); | |
550 | return var; | |
551 | } | |
552 | ||
553 | /* Generates an unique name that can be used for a varobj */ | |
554 | ||
555 | char * | |
556 | varobj_gen_name (void) | |
557 | { | |
558 | static int id = 0; | |
e64d9b3d | 559 | char *obj_name; |
8b93c638 JM |
560 | |
561 | /* generate a name for this object */ | |
562 | id++; | |
b435e160 | 563 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 564 | |
e64d9b3d | 565 | return obj_name; |
8b93c638 JM |
566 | } |
567 | ||
568 | /* Given an "objname", returns the pointer to the corresponding varobj | |
569 | or NULL if not found */ | |
570 | ||
571 | struct varobj * | |
572 | varobj_get_handle (char *objname) | |
573 | { | |
574 | struct vlist *cv; | |
575 | const char *chp; | |
576 | unsigned int index = 0; | |
577 | unsigned int i = 1; | |
578 | ||
579 | for (chp = objname; *chp; chp++) | |
580 | { | |
581 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
582 | } | |
583 | ||
584 | cv = *(varobj_table + index); | |
585 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
586 | cv = cv->next; | |
587 | ||
588 | if (cv == NULL) | |
8a3fe4f8 | 589 | error (_("Variable object not found")); |
8b93c638 JM |
590 | |
591 | return cv->var; | |
592 | } | |
593 | ||
594 | /* Given the handle, return the name of the object */ | |
595 | ||
596 | char * | |
597 | varobj_get_objname (struct varobj *var) | |
598 | { | |
599 | return var->obj_name; | |
600 | } | |
601 | ||
602 | /* Given the handle, return the expression represented by the object */ | |
603 | ||
604 | char * | |
605 | varobj_get_expression (struct varobj *var) | |
606 | { | |
607 | return name_of_variable (var); | |
608 | } | |
609 | ||
610 | /* Deletes a varobj and all its children if only_children == 0, | |
611 | otherwise deletes only the children; returns a malloc'ed list of all the | |
612 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
613 | ||
614 | int | |
615 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
616 | { | |
617 | int delcount; | |
618 | int mycount; | |
619 | struct cpstack *result = NULL; | |
620 | char **cp; | |
621 | ||
622 | /* Initialize a stack for temporary results */ | |
623 | cppush (&result, NULL); | |
624 | ||
625 | if (only_children) | |
626 | /* Delete only the variable children */ | |
627 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
628 | else | |
629 | /* Delete the variable and all its children */ | |
630 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
631 | ||
632 | /* We may have been asked to return a list of what has been deleted */ | |
633 | if (dellist != NULL) | |
634 | { | |
635 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
636 | ||
637 | cp = *dellist; | |
638 | mycount = delcount; | |
639 | *cp = cppop (&result); | |
640 | while ((*cp != NULL) && (mycount > 0)) | |
641 | { | |
642 | mycount--; | |
643 | cp++; | |
644 | *cp = cppop (&result); | |
645 | } | |
646 | ||
647 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 648 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 649 | mycount); |
8b93c638 JM |
650 | } |
651 | ||
652 | return delcount; | |
653 | } | |
654 | ||
655 | /* Set/Get variable object display format */ | |
656 | ||
657 | enum varobj_display_formats | |
658 | varobj_set_display_format (struct varobj *var, | |
659 | enum varobj_display_formats format) | |
660 | { | |
661 | switch (format) | |
662 | { | |
663 | case FORMAT_NATURAL: | |
664 | case FORMAT_BINARY: | |
665 | case FORMAT_DECIMAL: | |
666 | case FORMAT_HEXADECIMAL: | |
667 | case FORMAT_OCTAL: | |
668 | var->format = format; | |
669 | break; | |
670 | ||
671 | default: | |
672 | var->format = variable_default_display (var); | |
673 | } | |
674 | ||
675 | return var->format; | |
676 | } | |
677 | ||
678 | enum varobj_display_formats | |
679 | varobj_get_display_format (struct varobj *var) | |
680 | { | |
681 | return var->format; | |
682 | } | |
683 | ||
684 | int | |
685 | varobj_get_num_children (struct varobj *var) | |
686 | { | |
687 | if (var->num_children == -1) | |
688 | var->num_children = number_of_children (var); | |
689 | ||
690 | return var->num_children; | |
691 | } | |
692 | ||
693 | /* Creates a list of the immediate children of a variable object; | |
694 | the return code is the number of such children or -1 on error */ | |
695 | ||
696 | int | |
697 | varobj_list_children (struct varobj *var, struct varobj ***childlist) | |
698 | { | |
699 | struct varobj *child; | |
700 | char *name; | |
701 | int i; | |
702 | ||
703 | /* sanity check: have we been passed a pointer? */ | |
704 | if (childlist == NULL) | |
705 | return -1; | |
706 | ||
707 | *childlist = NULL; | |
708 | ||
709 | if (var->num_children == -1) | |
710 | var->num_children = number_of_children (var); | |
711 | ||
712 | /* List of children */ | |
713 | *childlist = xmalloc ((var->num_children + 1) * sizeof (struct varobj *)); | |
714 | ||
715 | for (i = 0; i < var->num_children; i++) | |
716 | { | |
717 | /* Mark as the end in case we bail out */ | |
718 | *((*childlist) + i) = NULL; | |
719 | ||
720 | /* check if child exists, if not create */ | |
721 | name = name_of_child (var, i); | |
722 | child = child_exists (var, name); | |
723 | if (child == NULL) | |
724 | child = create_child (var, i, name); | |
725 | ||
726 | *((*childlist) + i) = child; | |
727 | } | |
728 | ||
729 | /* End of list is marked by a NULL pointer */ | |
730 | *((*childlist) + i) = NULL; | |
731 | ||
732 | return var->num_children; | |
733 | } | |
734 | ||
735 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
736 | prints on the console */ | |
737 | ||
738 | char * | |
739 | varobj_get_type (struct varobj *var) | |
740 | { | |
30b28db1 | 741 | struct value *val; |
8b93c638 JM |
742 | struct cleanup *old_chain; |
743 | struct ui_file *stb; | |
744 | char *thetype; | |
745 | long length; | |
746 | ||
747 | /* For the "fake" variables, do not return a type. (It's type is | |
748 | NULL, too.) */ | |
749 | if (CPLUS_FAKE_CHILD (var)) | |
750 | return NULL; | |
751 | ||
752 | stb = mem_fileopen (); | |
753 | old_chain = make_cleanup_ui_file_delete (stb); | |
754 | ||
30b28db1 | 755 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
756 | cast it to our type. We then typeprint this variable. */ |
757 | val = value_zero (var->type, not_lval); | |
df407dfe | 758 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
759 | |
760 | thetype = ui_file_xstrdup (stb, &length); | |
761 | do_cleanups (old_chain); | |
762 | return thetype; | |
763 | } | |
764 | ||
1ecb4ee0 DJ |
765 | /* Obtain the type of an object variable. */ |
766 | ||
767 | struct type * | |
768 | varobj_get_gdb_type (struct varobj *var) | |
769 | { | |
770 | return var->type; | |
771 | } | |
772 | ||
8b93c638 JM |
773 | enum varobj_languages |
774 | varobj_get_language (struct varobj *var) | |
775 | { | |
776 | return variable_language (var); | |
777 | } | |
778 | ||
779 | int | |
780 | varobj_get_attributes (struct varobj *var) | |
781 | { | |
782 | int attributes = 0; | |
783 | ||
784 | if (variable_editable (var)) | |
785 | /* FIXME: define masks for attributes */ | |
786 | attributes |= 0x00000001; /* Editable */ | |
787 | ||
788 | return attributes; | |
789 | } | |
790 | ||
791 | char * | |
792 | varobj_get_value (struct varobj *var) | |
793 | { | |
794 | return my_value_of_variable (var); | |
795 | } | |
796 | ||
797 | /* Set the value of an object variable (if it is editable) to the | |
798 | value of the given expression */ | |
799 | /* Note: Invokes functions that can call error() */ | |
800 | ||
801 | int | |
802 | varobj_set_value (struct varobj *var, char *expression) | |
803 | { | |
30b28db1 | 804 | struct value *val; |
8b93c638 | 805 | int offset = 0; |
a6c442d8 | 806 | int error = 0; |
8b93c638 JM |
807 | |
808 | /* The argument "expression" contains the variable's new value. | |
809 | We need to first construct a legal expression for this -- ugh! */ | |
810 | /* Does this cover all the bases? */ | |
811 | struct expression *exp; | |
30b28db1 | 812 | struct value *value; |
8b93c638 JM |
813 | int saved_input_radix = input_radix; |
814 | ||
575bbeb6 | 815 | if (var->value != NULL && variable_editable (var) && !var->error) |
8b93c638 JM |
816 | { |
817 | char *s = expression; | |
818 | int i; | |
8b93c638 JM |
819 | |
820 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ | |
7a24eb7c | 821 | exp = parse_exp_1 (&s, 0, 0); |
8b93c638 JM |
822 | if (!gdb_evaluate_expression (exp, &value)) |
823 | { | |
824 | /* We cannot proceed without a valid expression. */ | |
8038e1e2 | 825 | xfree (exp); |
8b93c638 JM |
826 | return 0; |
827 | } | |
828 | ||
acd65feb VP |
829 | /* All types that are editable must also be changeable. */ |
830 | gdb_assert (type_changeable (var)); | |
831 | ||
832 | /* The value of a changeable variable object must not be lazy. */ | |
833 | gdb_assert (!value_lazy (var->value)); | |
834 | ||
835 | /* Need to coerce the input. We want to check if the | |
836 | value of the variable object will be different | |
837 | after assignment, and the first thing value_assign | |
838 | does is coerce the input. | |
839 | For example, if we are assigning an array to a pointer variable we | |
840 | should compare the pointer with the the array's address, not with the | |
841 | array's content. */ | |
842 | value = coerce_array (value); | |
843 | ||
acd65feb VP |
844 | /* The new value may be lazy. gdb_value_assign, or |
845 | rather value_contents, will take care of this. | |
846 | If fetching of the new value will fail, gdb_value_assign | |
847 | with catch the exception. */ | |
575bbeb6 | 848 | if (!gdb_value_assign (var->value, value, &val)) |
8a1a0112 | 849 | return 0; |
ae097835 | 850 | |
8b93c638 | 851 | release_value (val); |
ae097835 VP |
852 | |
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. | |
904 | Return 1 if so, and 0 if the values are equal. */ | |
905 | static int | |
906 | install_new_value (struct varobj *var, struct value *value, int initial) | |
907 | { | |
908 | int changeable; | |
909 | int need_to_fetch; | |
910 | int changed = 0; | |
911 | ||
912 | var->error = 0; | |
913 | /* We need to know the varobj's type to decide if the value should | |
914 | be fetched or not. C++ fake children (public/protected/private) don't have | |
915 | a type. */ | |
916 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
917 | changeable = type_changeable (var); | |
918 | need_to_fetch = changeable; | |
919 | ||
920 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) | |
921 | /* For unions, we need to fetch the value implicitly because | |
922 | of implementation of union member fetch. When gdb | |
923 | creates a value for a field and the value of the enclosing | |
924 | structure is not lazy, it immediately copies the necessary | |
925 | bytes from the enclosing values. If the enclosing value is | |
926 | lazy, the call to value_fetch_lazy on the field will read | |
927 | the data from memory. For unions, that means we'll read the | |
928 | same memory more than once, which is not desirable. So | |
929 | fetch now. */ | |
930 | need_to_fetch = 1; | |
931 | ||
932 | /* The new value might be lazy. If the type is changeable, | |
933 | that is we'll be comparing values of this type, fetch the | |
934 | value now. Otherwise, on the next update the old value | |
935 | will be lazy, which means we've lost that old value. */ | |
936 | if (need_to_fetch && value && value_lazy (value)) | |
937 | { | |
938 | if (!gdb_value_fetch_lazy (value)) | |
939 | { | |
940 | var->error = 1; | |
941 | /* Set the value to NULL, so that for the next -var-update, | |
942 | we don't try to compare the new value with this value, | |
943 | that we couldn't even read. */ | |
944 | value = NULL; | |
945 | } | |
946 | else | |
947 | var->error = 0; | |
948 | } | |
949 | ||
950 | /* If the type is changeable, compare the old and the new values. | |
951 | If this is the initial assignment, we don't have any old value | |
952 | to compare with. */ | |
953 | if (!initial && changeable) | |
954 | { | |
955 | /* If the value of the varobj was changed by -var-set-value, then the | |
956 | value in the varobj and in the target is the same. However, that value | |
957 | is different from the value that the varobj had after the previous | |
958 | -var-update. So need to the varobj as changed. */ | |
959 | if (var->updated) | |
960 | changed = 1; | |
961 | else | |
962 | { | |
963 | /* Try to compare the values. That requires that both | |
964 | values are non-lazy. */ | |
965 | ||
966 | /* Quick comparison of NULL values. */ | |
967 | if (var->value == NULL && value == NULL) | |
968 | /* Equal. */ | |
969 | ; | |
970 | else if (var->value == NULL || value == NULL) | |
971 | changed = 1; | |
972 | else | |
973 | { | |
974 | gdb_assert (!value_lazy (var->value)); | |
975 | gdb_assert (!value_lazy (value)); | |
976 | ||
977 | if (!value_contents_equal (var->value, value)) | |
978 | changed = 1; | |
979 | } | |
980 | } | |
981 | } | |
982 | ||
983 | /* We must always keep the new value, since children depend on it. */ | |
984 | if (var->value != NULL) | |
985 | value_free (var->value); | |
986 | var->value = value; | |
987 | var->updated = 0; | |
988 | ||
989 | return changed; | |
990 | } | |
991 | ||
992 | ||
8b93c638 JM |
993 | /* Update the values for a variable and its children. This is a |
994 | two-pronged attack. First, re-parse the value for the root's | |
995 | expression to see if it's changed. Then go all the way | |
996 | through its children, reconstructing them and noting if they've | |
997 | changed. | |
73a93a32 JI |
998 | Return value: |
999 | -1 if there was an error updating the varobj | |
1000 | -2 if the type changed | |
1001 | Otherwise it is the number of children + parent changed | |
8b93c638 | 1002 | |
705da579 KS |
1003 | Only root variables can be updated... |
1004 | ||
1005 | NOTE: This function may delete the caller's varobj. If it | |
1006 | returns -2, then it has done this and VARP will be modified | |
1007 | to point to the new varobj. */ | |
8b93c638 JM |
1008 | |
1009 | int | |
705da579 | 1010 | varobj_update (struct varobj **varp, struct varobj ***changelist) |
8b93c638 JM |
1011 | { |
1012 | int changed = 0; | |
a6c442d8 | 1013 | int error = 0; |
73a93a32 | 1014 | int type_changed; |
8b93c638 JM |
1015 | int i; |
1016 | int vleft; | |
8b93c638 JM |
1017 | struct varobj *v; |
1018 | struct varobj **cv; | |
2c67cb8b | 1019 | struct varobj **templist = NULL; |
30b28db1 | 1020 | struct value *new; |
8b93c638 JM |
1021 | struct vstack *stack = NULL; |
1022 | struct vstack *result = NULL; | |
e64d9b3d MH |
1023 | struct frame_id old_fid; |
1024 | struct frame_info *fi; | |
8b93c638 JM |
1025 | |
1026 | /* sanity check: have we been passed a pointer? */ | |
1027 | if (changelist == NULL) | |
1028 | return -1; | |
1029 | ||
1030 | /* Only root variables can be updated... */ | |
705da579 | 1031 | if ((*varp)->root->rootvar != *varp) |
8b93c638 JM |
1032 | /* Not a root var */ |
1033 | return -1; | |
1034 | ||
1035 | /* Save the selected stack frame, since we will need to change it | |
1036 | in order to evaluate expressions. */ | |
7a424e99 | 1037 | old_fid = get_frame_id (deprecated_selected_frame); |
8b93c638 JM |
1038 | |
1039 | /* Update the root variable. value_of_root can return NULL | |
1040 | if the variable is no longer around, i.e. we stepped out of | |
73a93a32 JI |
1041 | the frame in which a local existed. We are letting the |
1042 | value_of_root variable dispose of the varobj if the type | |
1043 | has changed. */ | |
1044 | type_changed = 1; | |
705da579 | 1045 | new = value_of_root (varp, &type_changed); |
8b93c638 | 1046 | if (new == NULL) |
73a93a32 | 1047 | { |
705da579 | 1048 | (*varp)->error = 1; |
73a93a32 JI |
1049 | return -1; |
1050 | } | |
8b93c638 JM |
1051 | |
1052 | /* Initialize a stack for temporary results */ | |
1053 | vpush (&result, NULL); | |
1054 | ||
ae093f96 FN |
1055 | /* If this is a "use_selected_frame" varobj, and its type has changed, |
1056 | them note that it's changed. */ | |
1057 | if (type_changed) | |
8b93c638 | 1058 | { |
705da579 | 1059 | vpush (&result, *varp); |
ae093f96 FN |
1060 | changed++; |
1061 | } | |
acd65feb VP |
1062 | |
1063 | if (install_new_value ((*varp), new, type_changed)) | |
ae093f96 | 1064 | { |
acd65feb VP |
1065 | /* If type_changed is 1, install_new_value will never return |
1066 | non-zero, so we'll never report the same variable twice. */ | |
1067 | gdb_assert (!type_changed); | |
1068 | vpush (&result, (*varp)); | |
ae093f96 | 1069 | changed++; |
8b93c638 | 1070 | } |
8b93c638 | 1071 | |
8b93c638 JM |
1072 | /* Initialize a stack */ |
1073 | vpush (&stack, NULL); | |
1074 | ||
1075 | /* Push the root's children */ | |
705da579 | 1076 | if ((*varp)->children != NULL) |
8b93c638 JM |
1077 | { |
1078 | struct varobj_child *c; | |
705da579 | 1079 | for (c = (*varp)->children; c != NULL; c = c->next) |
8b93c638 JM |
1080 | vpush (&stack, c->child); |
1081 | } | |
1082 | ||
1083 | /* Walk through the children, reconstructing them all. */ | |
1084 | v = vpop (&stack); | |
1085 | while (v != NULL) | |
1086 | { | |
1087 | /* Push any children */ | |
1088 | if (v->children != NULL) | |
1089 | { | |
1090 | struct varobj_child *c; | |
1091 | for (c = v->children; c != NULL; c = c->next) | |
1092 | vpush (&stack, c->child); | |
1093 | } | |
1094 | ||
1095 | /* Update this variable */ | |
1096 | new = value_of_child (v->parent, v->index); | |
acd65feb VP |
1097 | if (install_new_value (v, new, 0 /* type not changed */)) |
1098 | { | |
8b93c638 JM |
1099 | /* Note that it's changed */ |
1100 | vpush (&result, v); | |
fb9b6b35 | 1101 | v->updated = 0; |
8b93c638 JM |
1102 | changed++; |
1103 | } | |
8b93c638 JM |
1104 | |
1105 | /* Get next child */ | |
1106 | v = vpop (&stack); | |
1107 | } | |
1108 | ||
1109 | /* Alloc (changed + 1) list entries */ | |
1110 | /* FIXME: add a cleanup for the allocated list(s) | |
1111 | because one day the select_frame called below can longjump */ | |
1112 | *changelist = xmalloc ((changed + 1) * sizeof (struct varobj *)); | |
1113 | if (changed > 1) | |
1114 | { | |
1115 | templist = xmalloc ((changed + 1) * sizeof (struct varobj *)); | |
1116 | cv = templist; | |
1117 | } | |
1118 | else | |
1119 | cv = *changelist; | |
1120 | ||
1121 | /* Copy from result stack to list */ | |
1122 | vleft = changed; | |
1123 | *cv = vpop (&result); | |
1124 | while ((*cv != NULL) && (vleft > 0)) | |
1125 | { | |
1126 | vleft--; | |
1127 | cv++; | |
1128 | *cv = vpop (&result); | |
1129 | } | |
1130 | if (vleft) | |
8a3fe4f8 | 1131 | warning (_("varobj_update: assertion failed - vleft <> 0")); |
8b93c638 JM |
1132 | |
1133 | if (changed > 1) | |
1134 | { | |
1135 | /* Now we revert the order. */ | |
72330bd6 AC |
1136 | for (i = 0; i < changed; i++) |
1137 | *(*changelist + i) = *(templist + changed - 1 - i); | |
8b93c638 JM |
1138 | *(*changelist + changed) = NULL; |
1139 | } | |
1140 | ||
1141 | /* Restore selected frame */ | |
e64d9b3d MH |
1142 | fi = frame_find_by_id (old_fid); |
1143 | if (fi) | |
1144 | select_frame (fi); | |
8b93c638 | 1145 | |
73a93a32 JI |
1146 | if (type_changed) |
1147 | return -2; | |
1148 | else | |
1149 | return changed; | |
8b93c638 JM |
1150 | } |
1151 | \f | |
1152 | ||
1153 | /* Helper functions */ | |
1154 | ||
1155 | /* | |
1156 | * Variable object construction/destruction | |
1157 | */ | |
1158 | ||
1159 | static int | |
fba45db2 KB |
1160 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1161 | int only_children_p) | |
8b93c638 JM |
1162 | { |
1163 | int delcount = 0; | |
1164 | ||
1165 | delete_variable_1 (resultp, &delcount, var, | |
1166 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1167 | ||
1168 | return delcount; | |
1169 | } | |
1170 | ||
1171 | /* Delete the variable object VAR and its children */ | |
1172 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1173 | and the parent is not removed we dump core. It must be always | |
1174 | initially called with remove_from_parent_p set */ | |
1175 | static void | |
72330bd6 AC |
1176 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1177 | struct varobj *var, int only_children_p, | |
1178 | int remove_from_parent_p) | |
8b93c638 JM |
1179 | { |
1180 | struct varobj_child *vc; | |
1181 | struct varobj_child *next; | |
1182 | ||
1183 | /* Delete any children of this variable, too. */ | |
1184 | for (vc = var->children; vc != NULL; vc = next) | |
1185 | { | |
1186 | if (!remove_from_parent_p) | |
1187 | vc->child->parent = NULL; | |
1188 | delete_variable_1 (resultp, delcountp, vc->child, 0, only_children_p); | |
1189 | next = vc->next; | |
b8c9b27d | 1190 | xfree (vc); |
8b93c638 JM |
1191 | } |
1192 | ||
1193 | /* if we were called to delete only the children we are done here */ | |
1194 | if (only_children_p) | |
1195 | return; | |
1196 | ||
1197 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1198 | /* If the name is null, this is a temporary variable, that has not |
1199 | yet been installed, don't report it, it belongs to the caller... */ | |
1200 | if (var->obj_name != NULL) | |
8b93c638 | 1201 | { |
5b616ba1 | 1202 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1203 | *delcountp = *delcountp + 1; |
1204 | } | |
1205 | ||
1206 | /* If this variable has a parent, remove it from its parent's list */ | |
1207 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1208 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1209 | expensive list search to find the element to remove when we are | |
1210 | discarding the list afterwards */ | |
72330bd6 | 1211 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 JM |
1212 | { |
1213 | remove_child_from_parent (var->parent, var); | |
1214 | } | |
72330bd6 | 1215 | |
73a93a32 JI |
1216 | if (var->obj_name != NULL) |
1217 | uninstall_variable (var); | |
8b93c638 JM |
1218 | |
1219 | /* Free memory associated with this variable */ | |
1220 | free_variable (var); | |
1221 | } | |
1222 | ||
1223 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1224 | static int | |
fba45db2 | 1225 | install_variable (struct varobj *var) |
8b93c638 JM |
1226 | { |
1227 | struct vlist *cv; | |
1228 | struct vlist *newvl; | |
1229 | const char *chp; | |
1230 | unsigned int index = 0; | |
1231 | unsigned int i = 1; | |
1232 | ||
1233 | for (chp = var->obj_name; *chp; chp++) | |
1234 | { | |
1235 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1236 | } | |
1237 | ||
1238 | cv = *(varobj_table + index); | |
1239 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1240 | cv = cv->next; | |
1241 | ||
1242 | if (cv != NULL) | |
8a3fe4f8 | 1243 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1244 | |
1245 | /* Add varobj to hash table */ | |
1246 | newvl = xmalloc (sizeof (struct vlist)); | |
1247 | newvl->next = *(varobj_table + index); | |
1248 | newvl->var = var; | |
1249 | *(varobj_table + index) = newvl; | |
1250 | ||
1251 | /* If root, add varobj to root list */ | |
1252 | if (var->root->rootvar == var) | |
1253 | { | |
1254 | /* Add to list of root variables */ | |
1255 | if (rootlist == NULL) | |
1256 | var->root->next = NULL; | |
1257 | else | |
1258 | var->root->next = rootlist; | |
1259 | rootlist = var->root; | |
1260 | rootcount++; | |
1261 | } | |
1262 | ||
1263 | return 1; /* OK */ | |
1264 | } | |
1265 | ||
1266 | /* Unistall the object VAR. */ | |
1267 | static void | |
fba45db2 | 1268 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1269 | { |
1270 | struct vlist *cv; | |
1271 | struct vlist *prev; | |
1272 | struct varobj_root *cr; | |
1273 | struct varobj_root *prer; | |
1274 | const char *chp; | |
1275 | unsigned int index = 0; | |
1276 | unsigned int i = 1; | |
1277 | ||
1278 | /* Remove varobj from hash table */ | |
1279 | for (chp = var->obj_name; *chp; chp++) | |
1280 | { | |
1281 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1282 | } | |
1283 | ||
1284 | cv = *(varobj_table + index); | |
1285 | prev = NULL; | |
1286 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1287 | { | |
1288 | prev = cv; | |
1289 | cv = cv->next; | |
1290 | } | |
1291 | ||
1292 | if (varobjdebug) | |
1293 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1294 | ||
1295 | if (cv == NULL) | |
1296 | { | |
72330bd6 AC |
1297 | warning |
1298 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1299 | var->obj_name); | |
8b93c638 JM |
1300 | return; |
1301 | } | |
1302 | ||
1303 | if (prev == NULL) | |
1304 | *(varobj_table + index) = cv->next; | |
1305 | else | |
1306 | prev->next = cv->next; | |
1307 | ||
b8c9b27d | 1308 | xfree (cv); |
8b93c638 JM |
1309 | |
1310 | /* If root, remove varobj from root list */ | |
1311 | if (var->root->rootvar == var) | |
1312 | { | |
1313 | /* Remove from list of root variables */ | |
1314 | if (rootlist == var->root) | |
1315 | rootlist = var->root->next; | |
1316 | else | |
1317 | { | |
1318 | prer = NULL; | |
1319 | cr = rootlist; | |
1320 | while ((cr != NULL) && (cr->rootvar != var)) | |
1321 | { | |
1322 | prer = cr; | |
1323 | cr = cr->next; | |
1324 | } | |
1325 | if (cr == NULL) | |
1326 | { | |
72330bd6 AC |
1327 | warning |
1328 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1329 | var->obj_name); | |
8b93c638 JM |
1330 | return; |
1331 | } | |
1332 | if (prer == NULL) | |
1333 | rootlist = NULL; | |
1334 | else | |
1335 | prer->next = cr->next; | |
1336 | } | |
1337 | rootcount--; | |
1338 | } | |
1339 | ||
1340 | } | |
1341 | ||
1342 | /* Does a child with the name NAME exist in VAR? If so, return its data. | |
1343 | If not, return NULL. */ | |
1344 | static struct varobj * | |
1669605f | 1345 | child_exists (struct varobj *var, char *name) |
8b93c638 JM |
1346 | { |
1347 | struct varobj_child *vc; | |
1348 | ||
1349 | for (vc = var->children; vc != NULL; vc = vc->next) | |
1350 | { | |
6e382aa3 | 1351 | if (strcmp (vc->child->name, name) == 0) |
8b93c638 JM |
1352 | return vc->child; |
1353 | } | |
1354 | ||
1355 | return NULL; | |
1356 | } | |
1357 | ||
1358 | /* Create and install a child of the parent of the given name */ | |
1359 | static struct varobj * | |
fba45db2 | 1360 | create_child (struct varobj *parent, int index, char *name) |
8b93c638 JM |
1361 | { |
1362 | struct varobj *child; | |
1363 | char *childs_name; | |
acd65feb | 1364 | struct value *value; |
8b93c638 JM |
1365 | |
1366 | child = new_variable (); | |
1367 | ||
1368 | /* name is allocated by name_of_child */ | |
1369 | child->name = name; | |
1370 | child->index = index; | |
acd65feb | 1371 | value = value_of_child (parent, index); |
8b93c638 JM |
1372 | child->parent = parent; |
1373 | child->root = parent->root; | |
b435e160 | 1374 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1375 | child->obj_name = childs_name; |
1376 | install_variable (child); | |
1377 | ||
1378 | /* Save a pointer to this child in the parent */ | |
1379 | save_child_in_parent (parent, child); | |
1380 | ||
acd65feb VP |
1381 | /* Compute the type of the child. Must do this before |
1382 | calling install_new_value. */ | |
1383 | if (value != NULL) | |
1384 | /* If the child had no evaluation errors, var->value | |
1385 | will be non-NULL and contain a valid type. */ | |
1386 | child->type = value_type (value); | |
1387 | else | |
1388 | /* Otherwise, we must compute the type. */ | |
1389 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1390 | child->index); | |
1391 | install_new_value (child, value, 1); | |
1392 | ||
1393 | if ((!CPLUS_FAKE_CHILD (child) && child->value == NULL) || parent->error) | |
1394 | child->error = 1; | |
8b93c638 JM |
1395 | |
1396 | return child; | |
1397 | } | |
1398 | ||
1399 | /* FIXME: This should be a generic add to list */ | |
1400 | /* Save CHILD in the PARENT's data. */ | |
1401 | static void | |
fba45db2 | 1402 | save_child_in_parent (struct varobj *parent, struct varobj *child) |
8b93c638 JM |
1403 | { |
1404 | struct varobj_child *vc; | |
1405 | ||
1406 | /* Insert the child at the top */ | |
1407 | vc = parent->children; | |
1408 | parent->children = | |
1409 | (struct varobj_child *) xmalloc (sizeof (struct varobj_child)); | |
1410 | ||
1411 | parent->children->next = vc; | |
1412 | parent->children->child = child; | |
1413 | } | |
1414 | ||
1415 | /* FIXME: This should be a generic remove from list */ | |
1416 | /* Remove the CHILD from the PARENT's list of children. */ | |
1417 | static void | |
fba45db2 | 1418 | remove_child_from_parent (struct varobj *parent, struct varobj *child) |
8b93c638 JM |
1419 | { |
1420 | struct varobj_child *vc, *prev; | |
1421 | ||
1422 | /* Find the child in the parent's list */ | |
1423 | prev = NULL; | |
1424 | for (vc = parent->children; vc != NULL;) | |
1425 | { | |
1426 | if (vc->child == child) | |
1427 | break; | |
1428 | prev = vc; | |
1429 | vc = vc->next; | |
1430 | } | |
1431 | ||
1432 | if (prev == NULL) | |
1433 | parent->children = vc->next; | |
1434 | else | |
1435 | prev->next = vc->next; | |
1436 | ||
1437 | } | |
1438 | \f | |
1439 | ||
1440 | /* | |
1441 | * Miscellaneous utility functions. | |
1442 | */ | |
1443 | ||
1444 | /* Allocate memory and initialize a new variable */ | |
1445 | static struct varobj * | |
1446 | new_variable (void) | |
1447 | { | |
1448 | struct varobj *var; | |
1449 | ||
1450 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1451 | var->name = NULL; | |
1452 | var->obj_name = NULL; | |
1453 | var->index = -1; | |
1454 | var->type = NULL; | |
1455 | var->value = NULL; | |
1456 | var->error = 0; | |
1457 | var->num_children = -1; | |
1458 | var->parent = NULL; | |
1459 | var->children = NULL; | |
1460 | var->format = 0; | |
1461 | var->root = NULL; | |
fb9b6b35 | 1462 | var->updated = 0; |
8b93c638 JM |
1463 | |
1464 | return var; | |
1465 | } | |
1466 | ||
1467 | /* Allocate memory and initialize a new root variable */ | |
1468 | static struct varobj * | |
1469 | new_root_variable (void) | |
1470 | { | |
1471 | struct varobj *var = new_variable (); | |
1472 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1473 | var->root->lang = NULL; | |
1474 | var->root->exp = NULL; | |
1475 | var->root->valid_block = NULL; | |
7a424e99 | 1476 | var->root->frame = null_frame_id; |
73a93a32 | 1477 | var->root->use_selected_frame = 0; |
8b93c638 JM |
1478 | var->root->rootvar = NULL; |
1479 | ||
1480 | return var; | |
1481 | } | |
1482 | ||
1483 | /* Free any allocated memory associated with VAR. */ | |
1484 | static void | |
fba45db2 | 1485 | free_variable (struct varobj *var) |
8b93c638 JM |
1486 | { |
1487 | /* Free the expression if this is a root variable. */ | |
1488 | if (var->root->rootvar == var) | |
1489 | { | |
96c1eda2 | 1490 | free_current_contents (&var->root->exp); |
8038e1e2 | 1491 | xfree (var->root); |
8b93c638 JM |
1492 | } |
1493 | ||
8038e1e2 AC |
1494 | xfree (var->name); |
1495 | xfree (var->obj_name); | |
1496 | xfree (var); | |
8b93c638 JM |
1497 | } |
1498 | ||
74b7792f AC |
1499 | static void |
1500 | do_free_variable_cleanup (void *var) | |
1501 | { | |
1502 | free_variable (var); | |
1503 | } | |
1504 | ||
1505 | static struct cleanup * | |
1506 | make_cleanup_free_variable (struct varobj *var) | |
1507 | { | |
1508 | return make_cleanup (do_free_variable_cleanup, var); | |
1509 | } | |
1510 | ||
6766a268 DJ |
1511 | /* This returns the type of the variable. It also skips past typedefs |
1512 | to return the real type of the variable. | |
94b66fa7 KS |
1513 | |
1514 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1515 | except within get_target_type and get_type. */ | |
8b93c638 | 1516 | static struct type * |
fba45db2 | 1517 | get_type (struct varobj *var) |
8b93c638 JM |
1518 | { |
1519 | struct type *type; | |
1520 | type = var->type; | |
1521 | ||
6766a268 DJ |
1522 | if (type != NULL) |
1523 | type = check_typedef (type); | |
8b93c638 JM |
1524 | |
1525 | return type; | |
1526 | } | |
1527 | ||
1528 | /* This returns the type of the variable, dereferencing pointers, too. */ | |
1529 | static struct type * | |
fba45db2 | 1530 | get_type_deref (struct varobj *var) |
8b93c638 JM |
1531 | { |
1532 | struct type *type; | |
1533 | ||
1534 | type = get_type (var); | |
1535 | ||
1536 | if (type != NULL && (TYPE_CODE (type) == TYPE_CODE_PTR | |
1537 | || TYPE_CODE (type) == TYPE_CODE_REF)) | |
1538 | type = get_target_type (type); | |
1539 | ||
1540 | return type; | |
1541 | } | |
1542 | ||
1543 | /* This returns the target type (or NULL) of TYPE, also skipping | |
94b66fa7 KS |
1544 | past typedefs, just like get_type (). |
1545 | ||
1546 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1547 | except within get_target_type and get_type. */ | |
8b93c638 | 1548 | static struct type * |
fba45db2 | 1549 | get_target_type (struct type *type) |
8b93c638 JM |
1550 | { |
1551 | if (type != NULL) | |
1552 | { | |
1553 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1554 | if (type != NULL) |
1555 | type = check_typedef (type); | |
8b93c638 JM |
1556 | } |
1557 | ||
1558 | return type; | |
1559 | } | |
1560 | ||
1561 | /* What is the default display for this variable? We assume that | |
1562 | everything is "natural". Any exceptions? */ | |
1563 | static enum varobj_display_formats | |
fba45db2 | 1564 | variable_default_display (struct varobj *var) |
8b93c638 JM |
1565 | { |
1566 | return FORMAT_NATURAL; | |
1567 | } | |
1568 | ||
8b93c638 JM |
1569 | /* FIXME: The following should be generic for any pointer */ |
1570 | static void | |
fba45db2 | 1571 | vpush (struct vstack **pstack, struct varobj *var) |
8b93c638 JM |
1572 | { |
1573 | struct vstack *s; | |
1574 | ||
1575 | s = (struct vstack *) xmalloc (sizeof (struct vstack)); | |
1576 | s->var = var; | |
1577 | s->next = *pstack; | |
1578 | *pstack = s; | |
1579 | } | |
1580 | ||
1581 | /* FIXME: The following should be generic for any pointer */ | |
1582 | static struct varobj * | |
fba45db2 | 1583 | vpop (struct vstack **pstack) |
8b93c638 JM |
1584 | { |
1585 | struct vstack *s; | |
1586 | struct varobj *v; | |
1587 | ||
1588 | if ((*pstack)->var == NULL && (*pstack)->next == NULL) | |
1589 | return NULL; | |
1590 | ||
1591 | s = *pstack; | |
1592 | v = s->var; | |
1593 | *pstack = (*pstack)->next; | |
b8c9b27d | 1594 | xfree (s); |
8b93c638 JM |
1595 | |
1596 | return v; | |
1597 | } | |
1598 | ||
1599 | /* FIXME: The following should be generic for any pointer */ | |
1600 | static void | |
fba45db2 | 1601 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
1602 | { |
1603 | struct cpstack *s; | |
1604 | ||
1605 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1606 | s->name = name; | |
1607 | s->next = *pstack; | |
1608 | *pstack = s; | |
1609 | } | |
1610 | ||
1611 | /* FIXME: The following should be generic for any pointer */ | |
1612 | static char * | |
fba45db2 | 1613 | cppop (struct cpstack **pstack) |
8b93c638 JM |
1614 | { |
1615 | struct cpstack *s; | |
1616 | char *v; | |
1617 | ||
1618 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1619 | return NULL; | |
1620 | ||
1621 | s = *pstack; | |
1622 | v = s->name; | |
1623 | *pstack = (*pstack)->next; | |
b8c9b27d | 1624 | xfree (s); |
8b93c638 JM |
1625 | |
1626 | return v; | |
1627 | } | |
1628 | \f | |
1629 | /* | |
1630 | * Language-dependencies | |
1631 | */ | |
1632 | ||
1633 | /* Common entry points */ | |
1634 | ||
1635 | /* Get the language of variable VAR. */ | |
1636 | static enum varobj_languages | |
fba45db2 | 1637 | variable_language (struct varobj *var) |
8b93c638 JM |
1638 | { |
1639 | enum varobj_languages lang; | |
1640 | ||
1641 | switch (var->root->exp->language_defn->la_language) | |
1642 | { | |
1643 | default: | |
1644 | case language_c: | |
1645 | lang = vlang_c; | |
1646 | break; | |
1647 | case language_cplus: | |
1648 | lang = vlang_cplus; | |
1649 | break; | |
1650 | case language_java: | |
1651 | lang = vlang_java; | |
1652 | break; | |
1653 | } | |
1654 | ||
1655 | return lang; | |
1656 | } | |
1657 | ||
1658 | /* Return the number of children for a given variable. | |
1659 | The result of this function is defined by the language | |
1660 | implementation. The number of children returned by this function | |
1661 | is the number of children that the user will see in the variable | |
1662 | display. */ | |
1663 | static int | |
fba45db2 | 1664 | number_of_children (struct varobj *var) |
8b93c638 JM |
1665 | { |
1666 | return (*var->root->lang->number_of_children) (var);; | |
1667 | } | |
1668 | ||
1669 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1670 | static char * | |
fba45db2 | 1671 | name_of_variable (struct varobj *var) |
8b93c638 JM |
1672 | { |
1673 | return (*var->root->lang->name_of_variable) (var); | |
1674 | } | |
1675 | ||
1676 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1677 | static char * | |
fba45db2 | 1678 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
1679 | { |
1680 | return (*var->root->lang->name_of_child) (var, index); | |
1681 | } | |
1682 | ||
30b28db1 | 1683 | /* What is the ``struct value *'' of the root variable VAR? |
73a93a32 JI |
1684 | TYPE_CHANGED controls what to do if the type of a |
1685 | use_selected_frame = 1 variable changes. On input, | |
1686 | TYPE_CHANGED = 1 means discard the old varobj, and replace | |
1687 | it with this one. TYPE_CHANGED = 0 means leave it around. | |
1688 | NB: In both cases, var_handle will point to the new varobj, | |
1689 | so if you use TYPE_CHANGED = 0, you will have to stash the | |
1690 | old varobj pointer away somewhere before calling this. | |
1691 | On return, TYPE_CHANGED will be 1 if the type has changed, and | |
1692 | 0 otherwise. */ | |
30b28db1 | 1693 | static struct value * |
fba45db2 | 1694 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 1695 | { |
73a93a32 JI |
1696 | struct varobj *var; |
1697 | ||
1698 | if (var_handle == NULL) | |
1699 | return NULL; | |
1700 | ||
1701 | var = *var_handle; | |
1702 | ||
1703 | /* This should really be an exception, since this should | |
1704 | only get called with a root variable. */ | |
1705 | ||
1706 | if (var->root->rootvar != var) | |
1707 | return NULL; | |
1708 | ||
1709 | if (var->root->use_selected_frame) | |
1710 | { | |
1711 | struct varobj *tmp_var; | |
1712 | char *old_type, *new_type; | |
1713 | old_type = varobj_get_type (var); | |
1714 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
1715 | USE_SELECTED_FRAME); | |
1716 | if (tmp_var == NULL) | |
1717 | { | |
1718 | return NULL; | |
1719 | } | |
1720 | new_type = varobj_get_type (tmp_var); | |
72330bd6 | 1721 | if (strcmp (old_type, new_type) == 0) |
73a93a32 JI |
1722 | { |
1723 | varobj_delete (tmp_var, NULL, 0); | |
1724 | *type_changed = 0; | |
1725 | } | |
1726 | else | |
1727 | { | |
1728 | if (*type_changed) | |
1729 | { | |
72330bd6 | 1730 | tmp_var->obj_name = |
73a93a32 | 1731 | savestring (var->obj_name, strlen (var->obj_name)); |
f7635dd9 | 1732 | varobj_delete (var, NULL, 0); |
73a93a32 JI |
1733 | } |
1734 | else | |
1735 | { | |
72330bd6 | 1736 | tmp_var->obj_name = varobj_gen_name (); |
73a93a32 JI |
1737 | } |
1738 | install_variable (tmp_var); | |
1739 | *var_handle = tmp_var; | |
705da579 | 1740 | var = *var_handle; |
73a93a32 JI |
1741 | *type_changed = 1; |
1742 | } | |
1743 | } | |
1744 | else | |
1745 | { | |
1746 | *type_changed = 0; | |
1747 | } | |
1748 | ||
1749 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1750 | } |
1751 | ||
30b28db1 AC |
1752 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
1753 | static struct value * | |
fba45db2 | 1754 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 1755 | { |
30b28db1 | 1756 | struct value *value; |
8b93c638 JM |
1757 | |
1758 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1759 | ||
8b93c638 JM |
1760 | return value; |
1761 | } | |
1762 | ||
8b93c638 JM |
1763 | /* Is this variable editable? Use the variable's type to make |
1764 | this determination. */ | |
1765 | static int | |
fba45db2 | 1766 | variable_editable (struct varobj *var) |
8b93c638 JM |
1767 | { |
1768 | return (*var->root->lang->variable_editable) (var); | |
1769 | } | |
1770 | ||
1771 | /* GDB already has a command called "value_of_variable". Sigh. */ | |
1772 | static char * | |
fba45db2 | 1773 | my_value_of_variable (struct varobj *var) |
8b93c638 JM |
1774 | { |
1775 | return (*var->root->lang->value_of_variable) (var); | |
1776 | } | |
1777 | ||
acd65feb VP |
1778 | /* Return non-zero if changes in value of VAR |
1779 | must be detected and reported by -var-update. | |
1780 | Return zero is -var-update should never report | |
1781 | changes of such values. This makes sense for structures | |
1782 | (since the changes in children values will be reported separately), | |
1783 | or for artifical objects (like 'public' pseudo-field in C++). | |
1784 | ||
1785 | Return value of 0 means that gdb need not call value_fetch_lazy | |
1786 | for the value of this variable object. */ | |
8b93c638 | 1787 | static int |
fba45db2 | 1788 | type_changeable (struct varobj *var) |
8b93c638 JM |
1789 | { |
1790 | int r; | |
1791 | struct type *type; | |
1792 | ||
1793 | if (CPLUS_FAKE_CHILD (var)) | |
1794 | return 0; | |
1795 | ||
1796 | type = get_type (var); | |
1797 | ||
1798 | switch (TYPE_CODE (type)) | |
1799 | { | |
72330bd6 AC |
1800 | case TYPE_CODE_STRUCT: |
1801 | case TYPE_CODE_UNION: | |
1802 | case TYPE_CODE_ARRAY: | |
1803 | r = 0; | |
1804 | break; | |
8b93c638 | 1805 | |
72330bd6 AC |
1806 | default: |
1807 | r = 1; | |
8b93c638 JM |
1808 | } |
1809 | ||
1810 | return r; | |
1811 | } | |
1812 | ||
1813 | /* C */ | |
1814 | static int | |
fba45db2 | 1815 | c_number_of_children (struct varobj *var) |
8b93c638 JM |
1816 | { |
1817 | struct type *type; | |
1818 | struct type *target; | |
1819 | int children; | |
1820 | ||
1821 | type = get_type (var); | |
1822 | target = get_target_type (type); | |
1823 | children = 0; | |
1824 | ||
1825 | switch (TYPE_CODE (type)) | |
1826 | { | |
1827 | case TYPE_CODE_ARRAY: | |
1828 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
72330bd6 | 1829 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) |
8b93c638 JM |
1830 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
1831 | else | |
1832 | children = -1; | |
1833 | break; | |
1834 | ||
1835 | case TYPE_CODE_STRUCT: | |
1836 | case TYPE_CODE_UNION: | |
1837 | children = TYPE_NFIELDS (type); | |
1838 | break; | |
1839 | ||
1840 | case TYPE_CODE_PTR: | |
1841 | /* This is where things get compilcated. All pointers have one child. | |
1842 | Except, of course, for struct and union ptr, which we automagically | |
0755e6c1 FN |
1843 | dereference for the user and function ptrs, which have no children. |
1844 | We also don't dereference void* as we don't know what to show. | |
1845 | We can show char* so we allow it to be dereferenced. If you decide | |
1846 | to test for it, please mind that a little magic is necessary to | |
1847 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
1848 | TYPE_NAME == "char" */ | |
1849 | ||
8b93c638 JM |
1850 | switch (TYPE_CODE (target)) |
1851 | { | |
1852 | case TYPE_CODE_STRUCT: | |
1853 | case TYPE_CODE_UNION: | |
1854 | children = TYPE_NFIELDS (target); | |
1855 | break; | |
1856 | ||
1857 | case TYPE_CODE_FUNC: | |
0755e6c1 | 1858 | case TYPE_CODE_VOID: |
8b93c638 JM |
1859 | children = 0; |
1860 | break; | |
1861 | ||
1862 | default: | |
0755e6c1 | 1863 | children = 1; |
8b93c638 JM |
1864 | } |
1865 | break; | |
1866 | ||
1867 | default: | |
1868 | /* Other types have no children */ | |
1869 | break; | |
1870 | } | |
1871 | ||
1872 | return children; | |
1873 | } | |
1874 | ||
1875 | static char * | |
fba45db2 | 1876 | c_name_of_variable (struct varobj *parent) |
8b93c638 JM |
1877 | { |
1878 | return savestring (parent->name, strlen (parent->name)); | |
1879 | } | |
1880 | ||
1881 | static char * | |
fba45db2 | 1882 | c_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
1883 | { |
1884 | struct type *type; | |
1885 | struct type *target; | |
1886 | char *name; | |
1887 | char *string; | |
1888 | ||
1889 | type = get_type (parent); | |
1890 | target = get_target_type (type); | |
1891 | ||
1892 | switch (TYPE_CODE (type)) | |
1893 | { | |
1894 | case TYPE_CODE_ARRAY: | |
7a24eb7c NR |
1895 | name = xstrprintf ("%d", index |
1896 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
8b93c638 JM |
1897 | break; |
1898 | ||
1899 | case TYPE_CODE_STRUCT: | |
1900 | case TYPE_CODE_UNION: | |
1901 | string = TYPE_FIELD_NAME (type, index); | |
1902 | name = savestring (string, strlen (string)); | |
1903 | break; | |
1904 | ||
1905 | case TYPE_CODE_PTR: | |
1906 | switch (TYPE_CODE (target)) | |
1907 | { | |
1908 | case TYPE_CODE_STRUCT: | |
1909 | case TYPE_CODE_UNION: | |
1910 | string = TYPE_FIELD_NAME (target, index); | |
1911 | name = savestring (string, strlen (string)); | |
1912 | break; | |
1913 | ||
1914 | default: | |
b435e160 | 1915 | name = xstrprintf ("*%s", parent->name); |
8b93c638 JM |
1916 | break; |
1917 | } | |
1918 | break; | |
1919 | ||
1920 | default: | |
1921 | /* This should not happen */ | |
1922 | name = xstrdup ("???"); | |
1923 | } | |
1924 | ||
1925 | return name; | |
1926 | } | |
1927 | ||
30b28db1 | 1928 | static struct value * |
fba45db2 | 1929 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 1930 | { |
30b28db1 | 1931 | struct value *new_val; |
73a93a32 | 1932 | struct varobj *var = *var_handle; |
8b93c638 JM |
1933 | struct frame_info *fi; |
1934 | int within_scope; | |
1935 | ||
73a93a32 JI |
1936 | /* Only root variables can be updated... */ |
1937 | if (var->root->rootvar != var) | |
1938 | /* Not a root var */ | |
1939 | return NULL; | |
1940 | ||
72330bd6 | 1941 | |
8b93c638 JM |
1942 | /* Determine whether the variable is still around. */ |
1943 | if (var->root->valid_block == NULL) | |
1944 | within_scope = 1; | |
1945 | else | |
1946 | { | |
1947 | reinit_frame_cache (); | |
e64d9b3d | 1948 | fi = frame_find_by_id (var->root->frame); |
8b93c638 JM |
1949 | within_scope = fi != NULL; |
1950 | /* FIXME: select_frame could fail */ | |
1951 | if (within_scope) | |
0f7d239c | 1952 | select_frame (fi); |
8b93c638 | 1953 | } |
72330bd6 | 1954 | |
8b93c638 JM |
1955 | if (within_scope) |
1956 | { | |
73a93a32 | 1957 | /* We need to catch errors here, because if evaluate |
72330bd6 AC |
1958 | expression fails we just want to make val->error = 1 and |
1959 | go on */ | |
8b93c638 JM |
1960 | if (gdb_evaluate_expression (var->root->exp, &new_val)) |
1961 | { | |
acd65feb VP |
1962 | var->error = 0; |
1963 | release_value (new_val); | |
8b93c638 JM |
1964 | } |
1965 | else | |
1966 | var->error = 1; | |
72330bd6 | 1967 | |
8b93c638 JM |
1968 | return new_val; |
1969 | } | |
1970 | ||
1971 | return NULL; | |
1972 | } | |
1973 | ||
30b28db1 | 1974 | static struct value * |
fba45db2 | 1975 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 1976 | { |
30b28db1 AC |
1977 | struct value *value; |
1978 | struct value *temp; | |
1979 | struct value *indval; | |
8b93c638 JM |
1980 | struct type *type, *target; |
1981 | char *name; | |
7a24eb7c | 1982 | int real_index; |
8b93c638 JM |
1983 | |
1984 | type = get_type (parent); | |
1985 | target = get_target_type (type); | |
1986 | name = name_of_child (parent, index); | |
1987 | temp = parent->value; | |
1988 | value = NULL; | |
1989 | ||
1990 | if (temp != NULL) | |
1991 | { | |
1992 | switch (TYPE_CODE (type)) | |
1993 | { | |
1994 | case TYPE_CODE_ARRAY: | |
7a24eb7c | 1995 | real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); |
8310b29b | 1996 | #if 0 |
72330bd6 | 1997 | /* This breaks if the array lives in a (vector) register. */ |
7a24eb7c | 1998 | value = value_slice (temp, real_index, 1); |
8b93c638 JM |
1999 | temp = value_coerce_array (value); |
2000 | gdb_value_ind (temp, &value); | |
8310b29b | 2001 | #else |
7a24eb7c | 2002 | indval = value_from_longest (builtin_type_int, (LONGEST) real_index); |
8310b29b FN |
2003 | gdb_value_subscript (temp, indval, &value); |
2004 | #endif | |
8b93c638 JM |
2005 | break; |
2006 | ||
2007 | case TYPE_CODE_STRUCT: | |
2008 | case TYPE_CODE_UNION: | |
7f19b9a2 AC |
2009 | gdb_value_struct_elt (NULL, &value, &temp, NULL, name, NULL, |
2010 | "vstructure"); | |
8b93c638 JM |
2011 | break; |
2012 | ||
2013 | case TYPE_CODE_PTR: | |
2014 | switch (TYPE_CODE (target)) | |
2015 | { | |
2016 | case TYPE_CODE_STRUCT: | |
2017 | case TYPE_CODE_UNION: | |
7f19b9a2 AC |
2018 | gdb_value_struct_elt (NULL, &value, &temp, NULL, name, NULL, |
2019 | "vstructure"); | |
8b93c638 JM |
2020 | break; |
2021 | ||
2022 | default: | |
2023 | gdb_value_ind (temp, &value); | |
2024 | break; | |
2025 | } | |
2026 | break; | |
2027 | ||
2028 | default: | |
2029 | break; | |
2030 | } | |
2031 | } | |
2032 | ||
2033 | if (value != NULL) | |
2034 | release_value (value); | |
2035 | ||
5bbc1a8e | 2036 | xfree (name); |
8b93c638 JM |
2037 | return value; |
2038 | } | |
2039 | ||
2040 | static struct type * | |
fba45db2 | 2041 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2042 | { |
2043 | struct type *type; | |
2044 | char *name = name_of_child (parent, index); | |
2045 | ||
2046 | switch (TYPE_CODE (parent->type)) | |
2047 | { | |
2048 | case TYPE_CODE_ARRAY: | |
94b66fa7 | 2049 | type = get_target_type (parent->type); |
8b93c638 JM |
2050 | break; |
2051 | ||
2052 | case TYPE_CODE_STRUCT: | |
2053 | case TYPE_CODE_UNION: | |
2054 | type = lookup_struct_elt_type (parent->type, name, 0); | |
2055 | break; | |
2056 | ||
2057 | case TYPE_CODE_PTR: | |
94b66fa7 | 2058 | switch (TYPE_CODE (get_target_type (parent->type))) |
8b93c638 JM |
2059 | { |
2060 | case TYPE_CODE_STRUCT: | |
2061 | case TYPE_CODE_UNION: | |
2062 | type = lookup_struct_elt_type (parent->type, name, 0); | |
2063 | break; | |
2064 | ||
2065 | default: | |
94b66fa7 | 2066 | type = get_target_type (parent->type); |
8b93c638 JM |
2067 | break; |
2068 | } | |
2069 | break; | |
2070 | ||
2071 | default: | |
2072 | /* This should not happen as only the above types have children */ | |
8a3fe4f8 | 2073 | warning (_("Child of parent whose type does not allow children")); |
8b93c638 JM |
2074 | /* FIXME: Can we still go on? */ |
2075 | type = NULL; | |
2076 | break; | |
2077 | } | |
2078 | ||
5bbc1a8e | 2079 | xfree (name); |
8b93c638 JM |
2080 | return type; |
2081 | } | |
2082 | ||
2083 | static int | |
fba45db2 | 2084 | c_variable_editable (struct varobj *var) |
8b93c638 JM |
2085 | { |
2086 | switch (TYPE_CODE (get_type (var))) | |
2087 | { | |
2088 | case TYPE_CODE_STRUCT: | |
2089 | case TYPE_CODE_UNION: | |
2090 | case TYPE_CODE_ARRAY: | |
2091 | case TYPE_CODE_FUNC: | |
2092 | case TYPE_CODE_MEMBER: | |
2093 | case TYPE_CODE_METHOD: | |
2094 | return 0; | |
2095 | break; | |
2096 | ||
2097 | default: | |
2098 | return 1; | |
2099 | break; | |
2100 | } | |
2101 | } | |
2102 | ||
2103 | static char * | |
fba45db2 | 2104 | c_value_of_variable (struct varobj *var) |
8b93c638 | 2105 | { |
14b3d9c9 JB |
2106 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2107 | it will print out its children instead of "{...}". So we need to | |
2108 | catch that case explicitly. */ | |
2109 | struct type *type = get_type (var); | |
e64d9b3d | 2110 | |
14b3d9c9 JB |
2111 | /* Strip top-level references. */ |
2112 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2113 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2114 | ||
2115 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2116 | { |
2117 | case TYPE_CODE_STRUCT: | |
2118 | case TYPE_CODE_UNION: | |
2119 | return xstrdup ("{...}"); | |
2120 | /* break; */ | |
2121 | ||
2122 | case TYPE_CODE_ARRAY: | |
2123 | { | |
e64d9b3d | 2124 | char *number; |
b435e160 | 2125 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2126 | return (number); |
8b93c638 JM |
2127 | } |
2128 | /* break; */ | |
2129 | ||
2130 | default: | |
2131 | { | |
575bbeb6 KS |
2132 | if (var->value == NULL) |
2133 | { | |
2134 | /* This can happen if we attempt to get the value of a struct | |
2135 | member when the parent is an invalid pointer. This is an | |
2136 | error condition, so we should tell the caller. */ | |
2137 | return NULL; | |
2138 | } | |
2139 | else | |
2140 | { | |
e64d9b3d MH |
2141 | long dummy; |
2142 | struct ui_file *stb = mem_fileopen (); | |
2143 | struct cleanup *old_chain = make_cleanup_ui_file_delete (stb); | |
2144 | char *thevalue; | |
2145 | ||
acd65feb VP |
2146 | gdb_assert (type_changeable (var)); |
2147 | gdb_assert (!value_lazy (var->value)); | |
806048c6 DJ |
2148 | common_val_print (var->value, stb, |
2149 | format_code[(int) var->format], 1, 0, 0); | |
575bbeb6 KS |
2150 | thevalue = ui_file_xstrdup (stb, &dummy); |
2151 | do_cleanups (old_chain); | |
8b93c638 JM |
2152 | return thevalue; |
2153 | } | |
e64d9b3d | 2154 | } |
8b93c638 JM |
2155 | } |
2156 | } | |
2157 | \f | |
2158 | ||
2159 | /* C++ */ | |
2160 | ||
2161 | static int | |
fba45db2 | 2162 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2163 | { |
2164 | struct type *type; | |
2165 | int children, dont_know; | |
2166 | ||
2167 | dont_know = 1; | |
2168 | children = 0; | |
2169 | ||
2170 | if (!CPLUS_FAKE_CHILD (var)) | |
2171 | { | |
2172 | type = get_type_deref (var); | |
2173 | ||
2174 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2175 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2176 | { |
2177 | int kids[3]; | |
2178 | ||
2179 | cplus_class_num_children (type, kids); | |
2180 | if (kids[v_public] != 0) | |
2181 | children++; | |
2182 | if (kids[v_private] != 0) | |
2183 | children++; | |
2184 | if (kids[v_protected] != 0) | |
2185 | children++; | |
2186 | ||
2187 | /* Add any baseclasses */ | |
2188 | children += TYPE_N_BASECLASSES (type); | |
2189 | dont_know = 0; | |
2190 | ||
2191 | /* FIXME: save children in var */ | |
2192 | } | |
2193 | } | |
2194 | else | |
2195 | { | |
2196 | int kids[3]; | |
2197 | ||
2198 | type = get_type_deref (var->parent); | |
2199 | ||
2200 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2201 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2202 | children = kids[v_public]; |
6e382aa3 | 2203 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2204 | children = kids[v_private]; |
2205 | else | |
2206 | children = kids[v_protected]; | |
2207 | dont_know = 0; | |
2208 | } | |
2209 | ||
2210 | if (dont_know) | |
2211 | children = c_number_of_children (var); | |
2212 | ||
2213 | return children; | |
2214 | } | |
2215 | ||
2216 | /* Compute # of public, private, and protected variables in this class. | |
2217 | That means we need to descend into all baseclasses and find out | |
2218 | how many are there, too. */ | |
2219 | static void | |
1669605f | 2220 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2221 | { |
2222 | int i; | |
2223 | ||
2224 | children[v_public] = 0; | |
2225 | children[v_private] = 0; | |
2226 | children[v_protected] = 0; | |
2227 | ||
2228 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2229 | { | |
2230 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2231 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2232 | continue; |
2233 | ||
2234 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2235 | children[v_protected]++; | |
2236 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2237 | children[v_private]++; | |
2238 | else | |
2239 | children[v_public]++; | |
2240 | } | |
2241 | } | |
2242 | ||
2243 | static char * | |
fba45db2 | 2244 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2245 | { |
2246 | return c_name_of_variable (parent); | |
2247 | } | |
2248 | ||
2249 | static char * | |
fba45db2 | 2250 | cplus_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2251 | { |
2252 | char *name; | |
2253 | struct type *type; | |
8b93c638 JM |
2254 | |
2255 | if (CPLUS_FAKE_CHILD (parent)) | |
2256 | { | |
2257 | /* Looking for children of public, private, or protected. */ | |
2258 | type = get_type_deref (parent->parent); | |
2259 | } | |
2260 | else | |
2261 | type = get_type_deref (parent); | |
2262 | ||
2263 | name = NULL; | |
2264 | switch (TYPE_CODE (type)) | |
2265 | { | |
2266 | case TYPE_CODE_STRUCT: | |
2267 | case TYPE_CODE_UNION: | |
8b93c638 JM |
2268 | if (CPLUS_FAKE_CHILD (parent)) |
2269 | { | |
6e382aa3 JJ |
2270 | /* The fields of the class type are ordered as they |
2271 | appear in the class. We are given an index for a | |
2272 | particular access control type ("public","protected", | |
2273 | or "private"). We must skip over fields that don't | |
2274 | have the access control we are looking for to properly | |
2275 | find the indexed field. */ | |
2276 | int type_index = TYPE_N_BASECLASSES (type); | |
2277 | if (strcmp (parent->name, "private") == 0) | |
2278 | { | |
2279 | while (index >= 0) | |
2280 | { | |
2281 | if (TYPE_VPTR_BASETYPE (type) == type | |
2282 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2283 | ; /* ignore vptr */ | |
2284 | else if (TYPE_FIELD_PRIVATE (type, type_index)) | |
2285 | --index; | |
2286 | ++type_index; | |
2287 | } | |
2288 | --type_index; | |
2289 | } | |
2290 | else if (strcmp (parent->name, "protected") == 0) | |
2291 | { | |
2292 | while (index >= 0) | |
2293 | { | |
2294 | if (TYPE_VPTR_BASETYPE (type) == type | |
2295 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2296 | ; /* ignore vptr */ | |
2297 | else if (TYPE_FIELD_PROTECTED (type, type_index)) | |
2298 | --index; | |
2299 | ++type_index; | |
2300 | } | |
2301 | --type_index; | |
2302 | } | |
2303 | else | |
2304 | { | |
2305 | while (index >= 0) | |
2306 | { | |
2307 | if (TYPE_VPTR_BASETYPE (type) == type | |
2308 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2309 | ; /* ignore vptr */ | |
2310 | else if (!TYPE_FIELD_PRIVATE (type, type_index) && | |
2311 | !TYPE_FIELD_PROTECTED (type, type_index)) | |
2312 | --index; | |
2313 | ++type_index; | |
2314 | } | |
2315 | --type_index; | |
2316 | } | |
2317 | ||
2318 | name = TYPE_FIELD_NAME (type, type_index); | |
8b93c638 JM |
2319 | } |
2320 | else if (index < TYPE_N_BASECLASSES (type)) | |
6e382aa3 | 2321 | /* We are looking up the name of a base class */ |
8b93c638 JM |
2322 | name = TYPE_FIELD_NAME (type, index); |
2323 | else | |
2324 | { | |
6e382aa3 JJ |
2325 | int children[3]; |
2326 | cplus_class_num_children(type, children); | |
2327 | ||
8b93c638 | 2328 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2329 | only be "public", "private", or "protected" |
2330 | ||
2331 | The special "fake" children are always output by varobj in | |
2332 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2333 | index -= TYPE_N_BASECLASSES (type); |
2334 | switch (index) | |
2335 | { | |
2336 | case 0: | |
6e382aa3 JJ |
2337 | if (children[v_public] > 0) |
2338 | name = "public"; | |
2339 | else if (children[v_private] > 0) | |
2340 | name = "private"; | |
2341 | else | |
2342 | name = "protected"; | |
2343 | break; | |
8b93c638 | 2344 | case 1: |
6e382aa3 | 2345 | if (children[v_public] > 0) |
8b93c638 | 2346 | { |
6e382aa3 JJ |
2347 | if (children[v_private] > 0) |
2348 | name = "private"; | |
2349 | else | |
2350 | name = "protected"; | |
8b93c638 | 2351 | } |
6e382aa3 JJ |
2352 | else if (children[v_private] > 0) |
2353 | name = "protected"; | |
2354 | break; | |
8b93c638 | 2355 | case 2: |
6e382aa3 JJ |
2356 | /* Must be protected */ |
2357 | name = "protected"; | |
2358 | break; | |
8b93c638 JM |
2359 | default: |
2360 | /* error! */ | |
2361 | break; | |
2362 | } | |
2363 | } | |
2364 | break; | |
2365 | ||
2366 | default: | |
2367 | break; | |
2368 | } | |
2369 | ||
2370 | if (name == NULL) | |
2371 | return c_name_of_child (parent, index); | |
2372 | else | |
2373 | { | |
2374 | if (name != NULL) | |
2375 | name = savestring (name, strlen (name)); | |
2376 | } | |
2377 | ||
2378 | return name; | |
2379 | } | |
2380 | ||
30b28db1 | 2381 | static struct value * |
fba45db2 | 2382 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2383 | { |
73a93a32 | 2384 | return c_value_of_root (var_handle); |
8b93c638 JM |
2385 | } |
2386 | ||
30b28db1 | 2387 | static struct value * |
fba45db2 | 2388 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2389 | { |
2390 | struct type *type; | |
30b28db1 | 2391 | struct value *value; |
8b93c638 JM |
2392 | |
2393 | if (CPLUS_FAKE_CHILD (parent)) | |
2394 | type = get_type_deref (parent->parent); | |
2395 | else | |
2396 | type = get_type_deref (parent); | |
2397 | ||
2398 | value = NULL; | |
8b93c638 JM |
2399 | |
2400 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
2401 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) | |
2402 | { | |
2403 | if (CPLUS_FAKE_CHILD (parent)) | |
2404 | { | |
5bbc1a8e | 2405 | char *name; |
30b28db1 | 2406 | struct value *temp = parent->parent->value; |
30c6b1fb | 2407 | |
575bbeb6 KS |
2408 | if (temp == NULL) |
2409 | return NULL; | |
2410 | ||
5bbc1a8e | 2411 | name = name_of_child (parent, index); |
30c6b1fb KS |
2412 | gdb_value_struct_elt (NULL, &value, &temp, NULL, name, NULL, |
2413 | "cplus_structure"); | |
2414 | if (value != NULL) | |
2415 | release_value (value); | |
5bbc1a8e KS |
2416 | |
2417 | xfree (name); | |
8b93c638 JM |
2418 | } |
2419 | else if (index >= TYPE_N_BASECLASSES (type)) | |
2420 | { | |
2421 | /* public, private, or protected */ | |
2422 | return NULL; | |
2423 | } | |
2424 | else | |
2425 | { | |
2426 | /* Baseclass */ | |
2427 | if (parent->value != NULL) | |
2428 | { | |
575bbeb6 | 2429 | struct value *temp = NULL; |
8b93c638 | 2430 | |
4ae4f4fb VP |
2431 | /* No special processing for references is needed -- |
2432 | value_cast below handles references. */ | |
2433 | if (TYPE_CODE (value_type (parent->value)) == TYPE_CODE_PTR) | |
4abb499e KS |
2434 | { |
2435 | if (!gdb_value_ind (parent->value, &temp)) | |
2436 | return NULL; | |
2437 | } | |
8b93c638 JM |
2438 | else |
2439 | temp = parent->value; | |
2440 | ||
575bbeb6 KS |
2441 | if (temp != NULL) |
2442 | { | |
2443 | value = value_cast (TYPE_FIELD_TYPE (type, index), temp); | |
2444 | release_value (value); | |
2445 | } | |
2446 | else | |
2447 | { | |
2448 | /* We failed to evaluate the parent's value, so don't even | |
2449 | bother trying to evaluate this child. */ | |
2450 | return NULL; | |
2451 | } | |
8b93c638 JM |
2452 | } |
2453 | } | |
2454 | } | |
2455 | ||
2456 | if (value == NULL) | |
2457 | return c_value_of_child (parent, index); | |
2458 | ||
2459 | return value; | |
2460 | } | |
2461 | ||
2462 | static struct type * | |
fba45db2 | 2463 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2464 | { |
2465 | struct type *type, *t; | |
2466 | ||
575bbeb6 KS |
2467 | if (CPLUS_FAKE_CHILD (parent)) |
2468 | { | |
2469 | /* Looking for the type of a child of public, private, or protected. */ | |
2470 | t = get_type_deref (parent->parent); | |
2471 | } | |
2472 | else | |
2473 | t = get_type_deref (parent); | |
2474 | ||
8b93c638 JM |
2475 | type = NULL; |
2476 | switch (TYPE_CODE (t)) | |
2477 | { | |
2478 | case TYPE_CODE_STRUCT: | |
2479 | case TYPE_CODE_UNION: | |
575bbeb6 | 2480 | if (CPLUS_FAKE_CHILD (parent)) |
8b93c638 | 2481 | { |
575bbeb6 KS |
2482 | char *name = cplus_name_of_child (parent, index); |
2483 | type = lookup_struct_elt_type (t, name, 0); | |
2484 | xfree (name); | |
8b93c638 | 2485 | } |
575bbeb6 KS |
2486 | else if (index < TYPE_N_BASECLASSES (t)) |
2487 | type = TYPE_FIELD_TYPE (t, index); | |
8b93c638 JM |
2488 | else |
2489 | { | |
575bbeb6 KS |
2490 | /* special */ |
2491 | return NULL; | |
8b93c638 JM |
2492 | } |
2493 | break; | |
2494 | ||
2495 | default: | |
2496 | break; | |
2497 | } | |
2498 | ||
2499 | if (type == NULL) | |
2500 | return c_type_of_child (parent, index); | |
2501 | ||
2502 | return type; | |
2503 | } | |
2504 | ||
2505 | static int | |
fba45db2 | 2506 | cplus_variable_editable (struct varobj *var) |
8b93c638 JM |
2507 | { |
2508 | if (CPLUS_FAKE_CHILD (var)) | |
2509 | return 0; | |
2510 | ||
2511 | return c_variable_editable (var); | |
2512 | } | |
2513 | ||
2514 | static char * | |
fba45db2 | 2515 | cplus_value_of_variable (struct varobj *var) |
8b93c638 JM |
2516 | { |
2517 | ||
2518 | /* If we have one of our special types, don't print out | |
2519 | any value. */ | |
2520 | if (CPLUS_FAKE_CHILD (var)) | |
2521 | return xstrdup (""); | |
2522 | ||
2523 | return c_value_of_variable (var); | |
2524 | } | |
2525 | \f | |
2526 | /* Java */ | |
2527 | ||
2528 | static int | |
fba45db2 | 2529 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2530 | { |
2531 | return cplus_number_of_children (var); | |
2532 | } | |
2533 | ||
2534 | static char * | |
fba45db2 | 2535 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2536 | { |
2537 | char *p, *name; | |
2538 | ||
2539 | name = cplus_name_of_variable (parent); | |
2540 | /* If the name has "-" in it, it is because we | |
2541 | needed to escape periods in the name... */ | |
2542 | p = name; | |
2543 | ||
2544 | while (*p != '\000') | |
2545 | { | |
2546 | if (*p == '-') | |
2547 | *p = '.'; | |
2548 | p++; | |
2549 | } | |
2550 | ||
2551 | return name; | |
2552 | } | |
2553 | ||
2554 | static char * | |
fba45db2 | 2555 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2556 | { |
2557 | char *name, *p; | |
2558 | ||
2559 | name = cplus_name_of_child (parent, index); | |
2560 | /* Escape any periods in the name... */ | |
2561 | p = name; | |
2562 | ||
2563 | while (*p != '\000') | |
2564 | { | |
2565 | if (*p == '.') | |
2566 | *p = '-'; | |
2567 | p++; | |
2568 | } | |
2569 | ||
2570 | return name; | |
2571 | } | |
2572 | ||
30b28db1 | 2573 | static struct value * |
fba45db2 | 2574 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2575 | { |
73a93a32 | 2576 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2577 | } |
2578 | ||
30b28db1 | 2579 | static struct value * |
fba45db2 | 2580 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2581 | { |
2582 | return cplus_value_of_child (parent, index); | |
2583 | } | |
2584 | ||
2585 | static struct type * | |
fba45db2 | 2586 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2587 | { |
2588 | return cplus_type_of_child (parent, index); | |
2589 | } | |
2590 | ||
2591 | static int | |
fba45db2 | 2592 | java_variable_editable (struct varobj *var) |
8b93c638 JM |
2593 | { |
2594 | return cplus_variable_editable (var); | |
2595 | } | |
2596 | ||
2597 | static char * | |
fba45db2 | 2598 | java_value_of_variable (struct varobj *var) |
8b93c638 JM |
2599 | { |
2600 | return cplus_value_of_variable (var); | |
2601 | } | |
2602 | \f | |
2603 | extern void _initialize_varobj (void); | |
2604 | void | |
2605 | _initialize_varobj (void) | |
2606 | { | |
2607 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2608 | ||
2609 | varobj_table = xmalloc (sizeof_table); | |
2610 | memset (varobj_table, 0, sizeof_table); | |
2611 | ||
85c07804 AC |
2612 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2613 | &varobjdebug, _("\ | |
2614 | Set varobj debugging."), _("\ | |
2615 | Show varobj debugging."), _("\ | |
2616 | When non-zero, varobj debugging is enabled."), | |
2617 | NULL, | |
920d2a44 | 2618 | show_varobjdebug, |
85c07804 | 2619 | &setlist, &showlist); |
8b93c638 | 2620 | } |