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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" | |
d2353924 | 29 | #include "block.h" |
a6c442d8 MK |
30 | |
31 | #include "gdb_assert.h" | |
b66d6d2e | 32 | #include "gdb_string.h" |
8b93c638 JM |
33 | |
34 | #include "varobj.h" | |
35 | ||
36 | /* Non-zero if we want to see trace of varobj level stuff. */ | |
37 | ||
38 | int varobjdebug = 0; | |
920d2a44 AC |
39 | static void |
40 | show_varobjdebug (struct ui_file *file, int from_tty, | |
41 | struct cmd_list_element *c, const char *value) | |
42 | { | |
43 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
44 | } | |
8b93c638 JM |
45 | |
46 | /* String representations of gdb's format codes */ | |
47 | char *varobj_format_string[] = | |
72330bd6 | 48 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
49 | |
50 | /* String representations of gdb's known languages */ | |
72330bd6 | 51 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
52 | |
53 | /* Data structures */ | |
54 | ||
55 | /* Every root variable has one of these structures saved in its | |
56 | varobj. Members which must be free'd are noted. */ | |
57 | struct varobj_root | |
72330bd6 | 58 | { |
8b93c638 | 59 | |
72330bd6 AC |
60 | /* Alloc'd expression for this parent. */ |
61 | struct expression *exp; | |
8b93c638 | 62 | |
72330bd6 AC |
63 | /* Block for which this expression is valid */ |
64 | struct block *valid_block; | |
8b93c638 | 65 | |
72330bd6 | 66 | /* The frame for this expression */ |
e64d9b3d | 67 | struct frame_id frame; |
8b93c638 | 68 | |
72330bd6 AC |
69 | /* If 1, "update" always recomputes the frame & valid block |
70 | using the currently selected frame. */ | |
71 | int use_selected_frame; | |
73a93a32 | 72 | |
72330bd6 AC |
73 | /* Language info for this variable and its children */ |
74 | struct language_specific *lang; | |
8b93c638 | 75 | |
72330bd6 AC |
76 | /* The varobj for this root node. */ |
77 | struct varobj *rootvar; | |
8b93c638 | 78 | |
72330bd6 AC |
79 | /* Next root variable */ |
80 | struct varobj_root *next; | |
81 | }; | |
8b93c638 JM |
82 | |
83 | /* Every variable in the system has a structure of this type defined | |
84 | for it. This structure holds all information necessary to manipulate | |
85 | a particular object variable. Members which must be freed are noted. */ | |
86 | struct varobj | |
72330bd6 | 87 | { |
8b93c638 | 88 | |
72330bd6 AC |
89 | /* Alloc'd name of the variable for this object.. If this variable is a |
90 | child, then this name will be the child's source name. | |
91 | (bar, not foo.bar) */ | |
92 | /* NOTE: This is the "expression" */ | |
93 | char *name; | |
8b93c638 | 94 | |
72330bd6 AC |
95 | /* The alloc'd name for this variable's object. This is here for |
96 | convenience when constructing this object's children. */ | |
97 | char *obj_name; | |
8b93c638 | 98 | |
72330bd6 AC |
99 | /* Index of this variable in its parent or -1 */ |
100 | int index; | |
8b93c638 | 101 | |
72330bd6 AC |
102 | /* The type of this variable. This may NEVER be NULL. */ |
103 | struct type *type; | |
8b93c638 | 104 | |
acd65feb | 105 | /* The value of this expression or subexpression. This may be NULL. |
b2c2bd75 VP |
106 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
107 | the value is either NULL, or not lazy. */ | |
30b28db1 | 108 | struct value *value; |
8b93c638 | 109 | |
72330bd6 AC |
110 | /* Did an error occur evaluating the expression or getting its value? */ |
111 | int error; | |
8b93c638 | 112 | |
72330bd6 AC |
113 | /* The number of (immediate) children this variable has */ |
114 | int num_children; | |
8b93c638 | 115 | |
72330bd6 AC |
116 | /* If this object is a child, this points to its immediate parent. */ |
117 | struct varobj *parent; | |
8b93c638 | 118 | |
72330bd6 AC |
119 | /* A list of this object's children */ |
120 | struct varobj_child *children; | |
8b93c638 | 121 | |
72330bd6 AC |
122 | /* Description of the root variable. Points to root variable for children. */ |
123 | struct varobj_root *root; | |
8b93c638 | 124 | |
72330bd6 AC |
125 | /* The format of the output for this object */ |
126 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
127 | |
128 | /* Was this variable updated via a varobj_set_value operation */ | |
129 | int updated; | |
72330bd6 | 130 | }; |
8b93c638 JM |
131 | |
132 | /* Every variable keeps a linked list of its children, described | |
133 | by the following structure. */ | |
134 | /* FIXME: Deprecated. All should use vlist instead */ | |
135 | ||
136 | struct varobj_child | |
72330bd6 | 137 | { |
8b93c638 | 138 | |
72330bd6 AC |
139 | /* Pointer to the child's data */ |
140 | struct varobj *child; | |
8b93c638 | 141 | |
72330bd6 AC |
142 | /* Pointer to the next child */ |
143 | struct varobj_child *next; | |
144 | }; | |
8b93c638 JM |
145 | |
146 | /* A stack of varobjs */ | |
147 | /* FIXME: Deprecated. All should use vlist instead */ | |
148 | ||
149 | struct vstack | |
72330bd6 AC |
150 | { |
151 | struct varobj *var; | |
152 | struct vstack *next; | |
153 | }; | |
8b93c638 JM |
154 | |
155 | struct cpstack | |
72330bd6 AC |
156 | { |
157 | char *name; | |
158 | struct cpstack *next; | |
159 | }; | |
8b93c638 JM |
160 | |
161 | /* A list of varobjs */ | |
162 | ||
163 | struct vlist | |
72330bd6 AC |
164 | { |
165 | struct varobj *var; | |
166 | struct vlist *next; | |
167 | }; | |
8b93c638 JM |
168 | |
169 | /* Private function prototypes */ | |
170 | ||
171 | /* Helper functions for the above subcommands. */ | |
172 | ||
a14ed312 | 173 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 174 | |
a14ed312 KB |
175 | static void delete_variable_1 (struct cpstack **, int *, |
176 | struct varobj *, int, int); | |
8b93c638 | 177 | |
a14ed312 | 178 | static int install_variable (struct varobj *); |
8b93c638 | 179 | |
a14ed312 | 180 | static void uninstall_variable (struct varobj *); |
8b93c638 | 181 | |
a14ed312 | 182 | static struct varobj *child_exists (struct varobj *, char *); |
8b93c638 | 183 | |
a14ed312 | 184 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 185 | |
a14ed312 | 186 | static void save_child_in_parent (struct varobj *, struct varobj *); |
8b93c638 | 187 | |
a14ed312 | 188 | static void remove_child_from_parent (struct varobj *, struct varobj *); |
8b93c638 JM |
189 | |
190 | /* Utility routines */ | |
191 | ||
a14ed312 | 192 | static struct varobj *new_variable (void); |
8b93c638 | 193 | |
a14ed312 | 194 | static struct varobj *new_root_variable (void); |
8b93c638 | 195 | |
a14ed312 | 196 | static void free_variable (struct varobj *var); |
8b93c638 | 197 | |
74b7792f AC |
198 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
199 | ||
a14ed312 | 200 | static struct type *get_type (struct varobj *var); |
8b93c638 | 201 | |
a14ed312 | 202 | static struct type *get_type_deref (struct varobj *var); |
8b93c638 | 203 | |
a14ed312 | 204 | static struct type *get_target_type (struct type *); |
8b93c638 | 205 | |
a14ed312 | 206 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 207 | |
a14ed312 | 208 | static void vpush (struct vstack **pstack, struct varobj *var); |
8b93c638 | 209 | |
a14ed312 | 210 | static struct varobj *vpop (struct vstack **pstack); |
8b93c638 | 211 | |
a14ed312 | 212 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 213 | |
a14ed312 | 214 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 215 | |
acd65feb VP |
216 | static int install_new_value (struct varobj *var, struct value *value, |
217 | int initial); | |
218 | ||
8b93c638 JM |
219 | /* Language-specific routines. */ |
220 | ||
a14ed312 | 221 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 222 | |
a14ed312 | 223 | static int number_of_children (struct varobj *); |
8b93c638 | 224 | |
a14ed312 | 225 | static char *name_of_variable (struct varobj *); |
8b93c638 | 226 | |
a14ed312 | 227 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 228 | |
30b28db1 | 229 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 230 | |
30b28db1 | 231 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 232 | |
a14ed312 | 233 | static int variable_editable (struct varobj *var); |
8b93c638 | 234 | |
a14ed312 | 235 | static char *my_value_of_variable (struct varobj *var); |
8b93c638 | 236 | |
b2c2bd75 VP |
237 | static int varobj_value_is_changeable_p (struct varobj *var); |
238 | ||
239 | static int is_root_p (struct varobj *var); | |
8b93c638 JM |
240 | |
241 | /* C implementation */ | |
242 | ||
a14ed312 | 243 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 244 | |
a14ed312 | 245 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 246 | |
a14ed312 | 247 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 248 | |
30b28db1 | 249 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 250 | |
30b28db1 | 251 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 252 | |
a14ed312 | 253 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 254 | |
a14ed312 | 255 | static int c_variable_editable (struct varobj *var); |
8b93c638 | 256 | |
a14ed312 | 257 | static char *c_value_of_variable (struct varobj *var); |
8b93c638 JM |
258 | |
259 | /* C++ implementation */ | |
260 | ||
a14ed312 | 261 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 262 | |
a14ed312 | 263 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 264 | |
a14ed312 | 265 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 266 | |
a14ed312 | 267 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 268 | |
30b28db1 | 269 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 270 | |
30b28db1 | 271 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 272 | |
a14ed312 | 273 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 274 | |
a14ed312 | 275 | static int cplus_variable_editable (struct varobj *var); |
8b93c638 | 276 | |
a14ed312 | 277 | static char *cplus_value_of_variable (struct varobj *var); |
8b93c638 JM |
278 | |
279 | /* Java implementation */ | |
280 | ||
a14ed312 | 281 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 282 | |
a14ed312 | 283 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 284 | |
a14ed312 | 285 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 286 | |
30b28db1 | 287 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 288 | |
30b28db1 | 289 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 290 | |
a14ed312 | 291 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 292 | |
a14ed312 | 293 | static int java_variable_editable (struct varobj *var); |
8b93c638 | 294 | |
a14ed312 | 295 | static char *java_value_of_variable (struct varobj *var); |
8b93c638 JM |
296 | |
297 | /* The language specific vector */ | |
298 | ||
299 | struct language_specific | |
72330bd6 | 300 | { |
8b93c638 | 301 | |
72330bd6 AC |
302 | /* The language of this variable */ |
303 | enum varobj_languages language; | |
8b93c638 | 304 | |
72330bd6 AC |
305 | /* The number of children of PARENT. */ |
306 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 307 | |
72330bd6 AC |
308 | /* The name (expression) of a root varobj. */ |
309 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 310 | |
72330bd6 AC |
311 | /* The name of the INDEX'th child of PARENT. */ |
312 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 313 | |
30b28db1 AC |
314 | /* The ``struct value *'' of the root variable ROOT. */ |
315 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 316 | |
30b28db1 AC |
317 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
318 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 319 | |
72330bd6 AC |
320 | /* The type of the INDEX'th child of PARENT. */ |
321 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 322 | |
72330bd6 AC |
323 | /* Is VAR editable? */ |
324 | int (*variable_editable) (struct varobj * var); | |
8b93c638 | 325 | |
72330bd6 AC |
326 | /* The current value of VAR. */ |
327 | char *(*value_of_variable) (struct varobj * var); | |
328 | }; | |
8b93c638 JM |
329 | |
330 | /* Array of known source language routines. */ | |
d5d6fca5 | 331 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
332 | /* Unknown (try treating as C */ |
333 | { | |
72330bd6 AC |
334 | vlang_unknown, |
335 | c_number_of_children, | |
336 | c_name_of_variable, | |
337 | c_name_of_child, | |
338 | c_value_of_root, | |
339 | c_value_of_child, | |
340 | c_type_of_child, | |
341 | c_variable_editable, | |
342 | c_value_of_variable} | |
8b93c638 JM |
343 | , |
344 | /* C */ | |
345 | { | |
72330bd6 AC |
346 | vlang_c, |
347 | c_number_of_children, | |
348 | c_name_of_variable, | |
349 | c_name_of_child, | |
350 | c_value_of_root, | |
351 | c_value_of_child, | |
352 | c_type_of_child, | |
353 | c_variable_editable, | |
354 | c_value_of_variable} | |
8b93c638 JM |
355 | , |
356 | /* C++ */ | |
357 | { | |
72330bd6 AC |
358 | vlang_cplus, |
359 | cplus_number_of_children, | |
360 | cplus_name_of_variable, | |
361 | cplus_name_of_child, | |
362 | cplus_value_of_root, | |
363 | cplus_value_of_child, | |
364 | cplus_type_of_child, | |
365 | cplus_variable_editable, | |
366 | cplus_value_of_variable} | |
8b93c638 JM |
367 | , |
368 | /* Java */ | |
369 | { | |
72330bd6 AC |
370 | vlang_java, |
371 | java_number_of_children, | |
372 | java_name_of_variable, | |
373 | java_name_of_child, | |
374 | java_value_of_root, | |
375 | java_value_of_child, | |
376 | java_type_of_child, | |
377 | java_variable_editable, | |
378 | java_value_of_variable} | |
8b93c638 JM |
379 | }; |
380 | ||
381 | /* A little convenience enum for dealing with C++/Java */ | |
382 | enum vsections | |
72330bd6 AC |
383 | { |
384 | v_public = 0, v_private, v_protected | |
385 | }; | |
8b93c638 JM |
386 | |
387 | /* Private data */ | |
388 | ||
389 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 390 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
391 | |
392 | /* Header of the list of root variable objects */ | |
393 | static struct varobj_root *rootlist; | |
394 | static int rootcount = 0; /* number of root varobjs in the list */ | |
395 | ||
396 | /* Prime number indicating the number of buckets in the hash table */ | |
397 | /* A prime large enough to avoid too many colisions */ | |
398 | #define VAROBJ_TABLE_SIZE 227 | |
399 | ||
400 | /* Pointer to the varobj hash table (built at run time) */ | |
401 | static struct vlist **varobj_table; | |
402 | ||
8b93c638 JM |
403 | /* Is the variable X one of our "fake" children? */ |
404 | #define CPLUS_FAKE_CHILD(x) \ | |
405 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
406 | \f | |
407 | ||
408 | /* API Implementation */ | |
b2c2bd75 VP |
409 | static int |
410 | is_root_p (struct varobj *var) | |
411 | { | |
412 | return (var->root->rootvar == var); | |
413 | } | |
8b93c638 JM |
414 | |
415 | /* Creates a varobj (not its children) */ | |
416 | ||
7d8547c9 AC |
417 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
418 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
419 | ||
420 | static struct frame_info * | |
421 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
422 | { | |
423 | struct frame_info *frame = NULL; | |
424 | ||
425 | if (frame_addr == (CORE_ADDR) 0) | |
426 | return NULL; | |
427 | ||
428 | while (1) | |
429 | { | |
430 | frame = get_prev_frame (frame); | |
431 | if (frame == NULL) | |
432 | return NULL; | |
eb5492fa | 433 | if (get_frame_base_address (frame) == frame_addr) |
7d8547c9 AC |
434 | return frame; |
435 | } | |
436 | } | |
437 | ||
8b93c638 JM |
438 | struct varobj * |
439 | varobj_create (char *objname, | |
72330bd6 | 440 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
441 | { |
442 | struct varobj *var; | |
2c67cb8b AC |
443 | struct frame_info *fi; |
444 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
445 | struct block *block; |
446 | struct cleanup *old_chain; | |
447 | ||
448 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
449 | var = new_root_variable (); | |
74b7792f | 450 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
451 | |
452 | if (expression != NULL) | |
453 | { | |
454 | char *p; | |
455 | enum varobj_languages lang; | |
acd65feb | 456 | struct value *value; |
8b93c638 JM |
457 | |
458 | /* Parse and evaluate the expression, filling in as much | |
459 | of the variable's data as possible */ | |
460 | ||
461 | /* Allow creator to specify context of variable */ | |
72330bd6 | 462 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
6e7f8b9c | 463 | fi = deprecated_selected_frame; |
8b93c638 | 464 | else |
7d8547c9 AC |
465 | /* FIXME: cagney/2002-11-23: This code should be doing a |
466 | lookup using the frame ID and not just the frame's | |
467 | ``address''. This, of course, means an interface change. | |
468 | However, with out that interface change ISAs, such as the | |
469 | ia64 with its two stacks, won't work. Similar goes for the | |
470 | case where there is a frameless function. */ | |
8b93c638 JM |
471 | fi = find_frame_addr_in_frame_chain (frame); |
472 | ||
73a93a32 JI |
473 | /* frame = -2 means always use selected frame */ |
474 | if (type == USE_SELECTED_FRAME) | |
475 | var->root->use_selected_frame = 1; | |
476 | ||
8b93c638 JM |
477 | block = NULL; |
478 | if (fi != NULL) | |
ae767bfb | 479 | block = get_frame_block (fi, 0); |
8b93c638 JM |
480 | |
481 | p = expression; | |
482 | innermost_block = NULL; | |
73a93a32 JI |
483 | /* Wrap the call to parse expression, so we can |
484 | return a sensible error. */ | |
485 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
486 | { | |
487 | return NULL; | |
488 | } | |
8b93c638 JM |
489 | |
490 | /* Don't allow variables to be created for types. */ | |
491 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
492 | { | |
493 | do_cleanups (old_chain); | |
bc8332bb AC |
494 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
495 | " as an expression.\n"); | |
8b93c638 JM |
496 | return NULL; |
497 | } | |
498 | ||
499 | var->format = variable_default_display (var); | |
500 | var->root->valid_block = innermost_block; | |
501 | var->name = savestring (expression, strlen (expression)); | |
502 | ||
503 | /* When the frame is different from the current frame, | |
504 | we must select the appropriate frame before parsing | |
505 | the expression, otherwise the value will not be current. | |
506 | Since select_frame is so benign, just call it for all cases. */ | |
507 | if (fi != NULL) | |
508 | { | |
7a424e99 | 509 | var->root->frame = get_frame_id (fi); |
6e7f8b9c | 510 | old_fi = deprecated_selected_frame; |
0f7d239c | 511 | select_frame (fi); |
8b93c638 JM |
512 | } |
513 | ||
514 | /* We definitively need to catch errors here. | |
515 | If evaluate_expression succeeds we got the value we wanted. | |
516 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb VP |
517 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
518 | /* Error getting the value. Try to at least get the | |
519 | right type. */ | |
520 | value = evaluate_type (var->root->exp); | |
521 | ||
acd65feb | 522 | var->type = value_type (value); |
acd65feb | 523 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
524 | |
525 | /* Set language info */ | |
526 | lang = variable_language (var); | |
d5d6fca5 | 527 | var->root->lang = &languages[lang]; |
8b93c638 JM |
528 | |
529 | /* Set ourselves as our root */ | |
530 | var->root->rootvar = var; | |
531 | ||
532 | /* Reset the selected frame */ | |
533 | if (fi != NULL) | |
0f7d239c | 534 | select_frame (old_fi); |
8b93c638 JM |
535 | } |
536 | ||
73a93a32 JI |
537 | /* If the variable object name is null, that means this |
538 | is a temporary variable, so don't install it. */ | |
539 | ||
540 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 JM |
541 | { |
542 | var->obj_name = savestring (objname, strlen (objname)); | |
543 | ||
544 | /* If a varobj name is duplicated, the install will fail so | |
545 | we must clenup */ | |
546 | if (!install_variable (var)) | |
547 | { | |
548 | do_cleanups (old_chain); | |
549 | return NULL; | |
550 | } | |
551 | } | |
552 | ||
553 | discard_cleanups (old_chain); | |
554 | return var; | |
555 | } | |
556 | ||
557 | /* Generates an unique name that can be used for a varobj */ | |
558 | ||
559 | char * | |
560 | varobj_gen_name (void) | |
561 | { | |
562 | static int id = 0; | |
e64d9b3d | 563 | char *obj_name; |
8b93c638 JM |
564 | |
565 | /* generate a name for this object */ | |
566 | id++; | |
b435e160 | 567 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 568 | |
e64d9b3d | 569 | return obj_name; |
8b93c638 JM |
570 | } |
571 | ||
572 | /* Given an "objname", returns the pointer to the corresponding varobj | |
573 | or NULL if not found */ | |
574 | ||
575 | struct varobj * | |
576 | varobj_get_handle (char *objname) | |
577 | { | |
578 | struct vlist *cv; | |
579 | const char *chp; | |
580 | unsigned int index = 0; | |
581 | unsigned int i = 1; | |
582 | ||
583 | for (chp = objname; *chp; chp++) | |
584 | { | |
585 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
586 | } | |
587 | ||
588 | cv = *(varobj_table + index); | |
589 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
590 | cv = cv->next; | |
591 | ||
592 | if (cv == NULL) | |
8a3fe4f8 | 593 | error (_("Variable object not found")); |
8b93c638 JM |
594 | |
595 | return cv->var; | |
596 | } | |
597 | ||
598 | /* Given the handle, return the name of the object */ | |
599 | ||
600 | char * | |
601 | varobj_get_objname (struct varobj *var) | |
602 | { | |
603 | return var->obj_name; | |
604 | } | |
605 | ||
606 | /* Given the handle, return the expression represented by the object */ | |
607 | ||
608 | char * | |
609 | varobj_get_expression (struct varobj *var) | |
610 | { | |
611 | return name_of_variable (var); | |
612 | } | |
613 | ||
614 | /* Deletes a varobj and all its children if only_children == 0, | |
615 | otherwise deletes only the children; returns a malloc'ed list of all the | |
616 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
617 | ||
618 | int | |
619 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
620 | { | |
621 | int delcount; | |
622 | int mycount; | |
623 | struct cpstack *result = NULL; | |
624 | char **cp; | |
625 | ||
626 | /* Initialize a stack for temporary results */ | |
627 | cppush (&result, NULL); | |
628 | ||
629 | if (only_children) | |
630 | /* Delete only the variable children */ | |
631 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
632 | else | |
633 | /* Delete the variable and all its children */ | |
634 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
635 | ||
636 | /* We may have been asked to return a list of what has been deleted */ | |
637 | if (dellist != NULL) | |
638 | { | |
639 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
640 | ||
641 | cp = *dellist; | |
642 | mycount = delcount; | |
643 | *cp = cppop (&result); | |
644 | while ((*cp != NULL) && (mycount > 0)) | |
645 | { | |
646 | mycount--; | |
647 | cp++; | |
648 | *cp = cppop (&result); | |
649 | } | |
650 | ||
651 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 652 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 653 | mycount); |
8b93c638 JM |
654 | } |
655 | ||
656 | return delcount; | |
657 | } | |
658 | ||
659 | /* Set/Get variable object display format */ | |
660 | ||
661 | enum varobj_display_formats | |
662 | varobj_set_display_format (struct varobj *var, | |
663 | enum varobj_display_formats format) | |
664 | { | |
665 | switch (format) | |
666 | { | |
667 | case FORMAT_NATURAL: | |
668 | case FORMAT_BINARY: | |
669 | case FORMAT_DECIMAL: | |
670 | case FORMAT_HEXADECIMAL: | |
671 | case FORMAT_OCTAL: | |
672 | var->format = format; | |
673 | break; | |
674 | ||
675 | default: | |
676 | var->format = variable_default_display (var); | |
677 | } | |
678 | ||
679 | return var->format; | |
680 | } | |
681 | ||
682 | enum varobj_display_formats | |
683 | varobj_get_display_format (struct varobj *var) | |
684 | { | |
685 | return var->format; | |
686 | } | |
687 | ||
688 | int | |
689 | varobj_get_num_children (struct varobj *var) | |
690 | { | |
691 | if (var->num_children == -1) | |
692 | var->num_children = number_of_children (var); | |
693 | ||
694 | return var->num_children; | |
695 | } | |
696 | ||
697 | /* Creates a list of the immediate children of a variable object; | |
698 | the return code is the number of such children or -1 on error */ | |
699 | ||
700 | int | |
701 | varobj_list_children (struct varobj *var, struct varobj ***childlist) | |
702 | { | |
703 | struct varobj *child; | |
704 | char *name; | |
705 | int i; | |
706 | ||
707 | /* sanity check: have we been passed a pointer? */ | |
708 | if (childlist == NULL) | |
709 | return -1; | |
710 | ||
711 | *childlist = NULL; | |
712 | ||
713 | if (var->num_children == -1) | |
714 | var->num_children = number_of_children (var); | |
715 | ||
716 | /* List of children */ | |
717 | *childlist = xmalloc ((var->num_children + 1) * sizeof (struct varobj *)); | |
718 | ||
719 | for (i = 0; i < var->num_children; i++) | |
720 | { | |
721 | /* Mark as the end in case we bail out */ | |
722 | *((*childlist) + i) = NULL; | |
723 | ||
724 | /* check if child exists, if not create */ | |
725 | name = name_of_child (var, i); | |
726 | child = child_exists (var, name); | |
727 | if (child == NULL) | |
728 | child = create_child (var, i, name); | |
729 | ||
730 | *((*childlist) + i) = child; | |
731 | } | |
732 | ||
733 | /* End of list is marked by a NULL pointer */ | |
734 | *((*childlist) + i) = NULL; | |
735 | ||
736 | return var->num_children; | |
737 | } | |
738 | ||
739 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
740 | prints on the console */ | |
741 | ||
742 | char * | |
743 | varobj_get_type (struct varobj *var) | |
744 | { | |
30b28db1 | 745 | struct value *val; |
8b93c638 JM |
746 | struct cleanup *old_chain; |
747 | struct ui_file *stb; | |
748 | char *thetype; | |
749 | long length; | |
750 | ||
751 | /* For the "fake" variables, do not return a type. (It's type is | |
752 | NULL, too.) */ | |
753 | if (CPLUS_FAKE_CHILD (var)) | |
754 | return NULL; | |
755 | ||
756 | stb = mem_fileopen (); | |
757 | old_chain = make_cleanup_ui_file_delete (stb); | |
758 | ||
30b28db1 | 759 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
760 | cast it to our type. We then typeprint this variable. */ |
761 | val = value_zero (var->type, not_lval); | |
df407dfe | 762 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
763 | |
764 | thetype = ui_file_xstrdup (stb, &length); | |
765 | do_cleanups (old_chain); | |
766 | return thetype; | |
767 | } | |
768 | ||
1ecb4ee0 DJ |
769 | /* Obtain the type of an object variable. */ |
770 | ||
771 | struct type * | |
772 | varobj_get_gdb_type (struct varobj *var) | |
773 | { | |
774 | return var->type; | |
775 | } | |
776 | ||
8b93c638 JM |
777 | enum varobj_languages |
778 | varobj_get_language (struct varobj *var) | |
779 | { | |
780 | return variable_language (var); | |
781 | } | |
782 | ||
783 | int | |
784 | varobj_get_attributes (struct varobj *var) | |
785 | { | |
786 | int attributes = 0; | |
787 | ||
788 | if (variable_editable (var)) | |
789 | /* FIXME: define masks for attributes */ | |
790 | attributes |= 0x00000001; /* Editable */ | |
791 | ||
792 | return attributes; | |
793 | } | |
794 | ||
795 | char * | |
796 | varobj_get_value (struct varobj *var) | |
797 | { | |
798 | return my_value_of_variable (var); | |
799 | } | |
800 | ||
801 | /* Set the value of an object variable (if it is editable) to the | |
802 | value of the given expression */ | |
803 | /* Note: Invokes functions that can call error() */ | |
804 | ||
805 | int | |
806 | varobj_set_value (struct varobj *var, char *expression) | |
807 | { | |
30b28db1 | 808 | struct value *val; |
8b93c638 | 809 | int offset = 0; |
a6c442d8 | 810 | int error = 0; |
8b93c638 JM |
811 | |
812 | /* The argument "expression" contains the variable's new value. | |
813 | We need to first construct a legal expression for this -- ugh! */ | |
814 | /* Does this cover all the bases? */ | |
815 | struct expression *exp; | |
30b28db1 | 816 | struct value *value; |
8b93c638 JM |
817 | int saved_input_radix = input_radix; |
818 | ||
575bbeb6 | 819 | if (var->value != NULL && variable_editable (var) && !var->error) |
8b93c638 JM |
820 | { |
821 | char *s = expression; | |
822 | int i; | |
8b93c638 JM |
823 | |
824 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ | |
7a24eb7c | 825 | exp = parse_exp_1 (&s, 0, 0); |
8b93c638 JM |
826 | if (!gdb_evaluate_expression (exp, &value)) |
827 | { | |
828 | /* We cannot proceed without a valid expression. */ | |
8038e1e2 | 829 | xfree (exp); |
8b93c638 JM |
830 | return 0; |
831 | } | |
832 | ||
acd65feb | 833 | /* All types that are editable must also be changeable. */ |
b2c2bd75 | 834 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb VP |
835 | |
836 | /* The value of a changeable variable object must not be lazy. */ | |
837 | gdb_assert (!value_lazy (var->value)); | |
838 | ||
839 | /* Need to coerce the input. We want to check if the | |
840 | value of the variable object will be different | |
841 | after assignment, and the first thing value_assign | |
842 | does is coerce the input. | |
843 | For example, if we are assigning an array to a pointer variable we | |
844 | should compare the pointer with the the array's address, not with the | |
845 | array's content. */ | |
846 | value = coerce_array (value); | |
847 | ||
acd65feb VP |
848 | /* The new value may be lazy. gdb_value_assign, or |
849 | rather value_contents, will take care of this. | |
850 | If fetching of the new value will fail, gdb_value_assign | |
851 | with catch the exception. */ | |
575bbeb6 | 852 | if (!gdb_value_assign (var->value, value, &val)) |
8a1a0112 | 853 | return 0; |
b26ed50d | 854 | |
ae097835 VP |
855 | /* If the value has changed, record it, so that next -var-update can |
856 | report this change. If a variable had a value of '1', we've set it | |
857 | to '333' and then set again to '1', when -var-update will report this | |
858 | variable as changed -- because the first assignment has set the | |
859 | 'updated' flag. There's no need to optimize that, because return value | |
860 | of -var-update should be considered an approximation. */ | |
861 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
8b93c638 JM |
862 | input_radix = saved_input_radix; |
863 | return 1; | |
864 | } | |
865 | ||
866 | return 0; | |
867 | } | |
868 | ||
869 | /* Returns a malloc'ed list with all root variable objects */ | |
870 | int | |
871 | varobj_list (struct varobj ***varlist) | |
872 | { | |
873 | struct varobj **cv; | |
874 | struct varobj_root *croot; | |
875 | int mycount = rootcount; | |
876 | ||
877 | /* Alloc (rootcount + 1) entries for the result */ | |
878 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
879 | ||
880 | cv = *varlist; | |
881 | croot = rootlist; | |
882 | while ((croot != NULL) && (mycount > 0)) | |
883 | { | |
884 | *cv = croot->rootvar; | |
885 | mycount--; | |
886 | cv++; | |
887 | croot = croot->next; | |
888 | } | |
889 | /* Mark the end of the list */ | |
890 | *cv = NULL; | |
891 | ||
892 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
893 | warning |
894 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
895 | rootcount, mycount); | |
8b93c638 JM |
896 | |
897 | return rootcount; | |
898 | } | |
899 | ||
acd65feb VP |
900 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
901 | this is the first assignement after the variable object was just | |
902 | created, or changed type. In that case, just assign the value | |
903 | and return 0. | |
904 | Otherwise, assign the value and if type_changeable returns non-zero, | |
905 | find if the new value is different from the current value. | |
b26ed50d VP |
906 | Return 1 if so, and 0 if the values are equal. |
907 | ||
908 | The VALUE parameter should not be released -- the function will | |
909 | take care of releasing it when needed. */ | |
acd65feb VP |
910 | static int |
911 | install_new_value (struct varobj *var, struct value *value, int initial) | |
912 | { | |
913 | int changeable; | |
914 | int need_to_fetch; | |
915 | int changed = 0; | |
916 | ||
917 | var->error = 0; | |
918 | /* We need to know the varobj's type to decide if the value should | |
919 | be fetched or not. C++ fake children (public/protected/private) don't have | |
920 | a type. */ | |
921 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 922 | changeable = varobj_value_is_changeable_p (var); |
acd65feb VP |
923 | need_to_fetch = changeable; |
924 | ||
b26ed50d VP |
925 | /* We are not interested in the address of references, and given |
926 | that in C++ a reference is not rebindable, it cannot | |
927 | meaningfully change. So, get hold of the real value. */ | |
928 | if (value) | |
929 | { | |
930 | value = coerce_ref (value); | |
931 | release_value (value); | |
932 | } | |
933 | ||
acd65feb VP |
934 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
935 | /* For unions, we need to fetch the value implicitly because | |
936 | of implementation of union member fetch. When gdb | |
937 | creates a value for a field and the value of the enclosing | |
938 | structure is not lazy, it immediately copies the necessary | |
939 | bytes from the enclosing values. If the enclosing value is | |
940 | lazy, the call to value_fetch_lazy on the field will read | |
941 | the data from memory. For unions, that means we'll read the | |
942 | same memory more than once, which is not desirable. So | |
943 | fetch now. */ | |
944 | need_to_fetch = 1; | |
945 | ||
946 | /* The new value might be lazy. If the type is changeable, | |
947 | that is we'll be comparing values of this type, fetch the | |
948 | value now. Otherwise, on the next update the old value | |
949 | will be lazy, which means we've lost that old value. */ | |
950 | if (need_to_fetch && value && value_lazy (value)) | |
951 | { | |
952 | if (!gdb_value_fetch_lazy (value)) | |
953 | { | |
954 | var->error = 1; | |
955 | /* Set the value to NULL, so that for the next -var-update, | |
956 | we don't try to compare the new value with this value, | |
957 | that we couldn't even read. */ | |
958 | value = NULL; | |
959 | } | |
960 | else | |
961 | var->error = 0; | |
962 | } | |
963 | ||
964 | /* If the type is changeable, compare the old and the new values. | |
965 | If this is the initial assignment, we don't have any old value | |
966 | to compare with. */ | |
967 | if (!initial && changeable) | |
968 | { | |
969 | /* If the value of the varobj was changed by -var-set-value, then the | |
970 | value in the varobj and in the target is the same. However, that value | |
971 | is different from the value that the varobj had after the previous | |
972 | -var-update. So need to the varobj as changed. */ | |
973 | if (var->updated) | |
974 | changed = 1; | |
975 | else | |
976 | { | |
977 | /* Try to compare the values. That requires that both | |
978 | values are non-lazy. */ | |
979 | ||
980 | /* Quick comparison of NULL values. */ | |
981 | if (var->value == NULL && value == NULL) | |
982 | /* Equal. */ | |
983 | ; | |
984 | else if (var->value == NULL || value == NULL) | |
985 | changed = 1; | |
986 | else | |
987 | { | |
988 | gdb_assert (!value_lazy (var->value)); | |
989 | gdb_assert (!value_lazy (value)); | |
990 | ||
991 | if (!value_contents_equal (var->value, value)) | |
992 | changed = 1; | |
993 | } | |
994 | } | |
995 | } | |
996 | ||
997 | /* We must always keep the new value, since children depend on it. */ | |
998 | if (var->value != NULL) | |
999 | value_free (var->value); | |
1000 | var->value = value; | |
1001 | var->updated = 0; | |
b26ed50d VP |
1002 | |
1003 | gdb_assert (!var->value || value_type (var->value)); | |
acd65feb VP |
1004 | |
1005 | return changed; | |
1006 | } | |
1007 | ||
1008 | ||
8b93c638 JM |
1009 | /* Update the values for a variable and its children. This is a |
1010 | two-pronged attack. First, re-parse the value for the root's | |
1011 | expression to see if it's changed. Then go all the way | |
1012 | through its children, reconstructing them and noting if they've | |
1013 | changed. | |
73a93a32 JI |
1014 | Return value: |
1015 | -1 if there was an error updating the varobj | |
1016 | -2 if the type changed | |
1017 | Otherwise it is the number of children + parent changed | |
8b93c638 | 1018 | |
705da579 KS |
1019 | Only root variables can be updated... |
1020 | ||
1021 | NOTE: This function may delete the caller's varobj. If it | |
1022 | returns -2, then it has done this and VARP will be modified | |
1023 | to point to the new varobj. */ | |
8b93c638 JM |
1024 | |
1025 | int | |
705da579 | 1026 | varobj_update (struct varobj **varp, struct varobj ***changelist) |
8b93c638 JM |
1027 | { |
1028 | int changed = 0; | |
a6c442d8 | 1029 | int error = 0; |
73a93a32 | 1030 | int type_changed; |
8b93c638 JM |
1031 | int i; |
1032 | int vleft; | |
8b93c638 JM |
1033 | struct varobj *v; |
1034 | struct varobj **cv; | |
2c67cb8b | 1035 | struct varobj **templist = NULL; |
30b28db1 | 1036 | struct value *new; |
8b93c638 JM |
1037 | struct vstack *stack = NULL; |
1038 | struct vstack *result = NULL; | |
e64d9b3d MH |
1039 | struct frame_id old_fid; |
1040 | struct frame_info *fi; | |
8b93c638 JM |
1041 | |
1042 | /* sanity check: have we been passed a pointer? */ | |
1043 | if (changelist == NULL) | |
1044 | return -1; | |
1045 | ||
1046 | /* Only root variables can be updated... */ | |
b2c2bd75 | 1047 | if (!is_root_p (*varp)) |
8b93c638 JM |
1048 | /* Not a root var */ |
1049 | return -1; | |
1050 | ||
1051 | /* Save the selected stack frame, since we will need to change it | |
1052 | in order to evaluate expressions. */ | |
7a424e99 | 1053 | old_fid = get_frame_id (deprecated_selected_frame); |
8b93c638 JM |
1054 | |
1055 | /* Update the root variable. value_of_root can return NULL | |
1056 | if the variable is no longer around, i.e. we stepped out of | |
73a93a32 JI |
1057 | the frame in which a local existed. We are letting the |
1058 | value_of_root variable dispose of the varobj if the type | |
1059 | has changed. */ | |
1060 | type_changed = 1; | |
705da579 | 1061 | new = value_of_root (varp, &type_changed); |
0d2bd018 NR |
1062 | |
1063 | /* Restore selected frame */ | |
1064 | fi = frame_find_by_id (old_fid); | |
1065 | if (fi) | |
1066 | select_frame (fi); | |
1067 | ||
8b93c638 | 1068 | if (new == NULL) |
73a93a32 | 1069 | { |
705da579 | 1070 | (*varp)->error = 1; |
73a93a32 JI |
1071 | return -1; |
1072 | } | |
8b93c638 JM |
1073 | |
1074 | /* Initialize a stack for temporary results */ | |
1075 | vpush (&result, NULL); | |
1076 | ||
ae093f96 FN |
1077 | /* If this is a "use_selected_frame" varobj, and its type has changed, |
1078 | them note that it's changed. */ | |
1079 | if (type_changed) | |
8b93c638 | 1080 | { |
705da579 | 1081 | vpush (&result, *varp); |
ae093f96 FN |
1082 | changed++; |
1083 | } | |
acd65feb VP |
1084 | |
1085 | if (install_new_value ((*varp), new, type_changed)) | |
ae093f96 | 1086 | { |
acd65feb VP |
1087 | /* If type_changed is 1, install_new_value will never return |
1088 | non-zero, so we'll never report the same variable twice. */ | |
1089 | gdb_assert (!type_changed); | |
1090 | vpush (&result, (*varp)); | |
ae093f96 | 1091 | changed++; |
8b93c638 | 1092 | } |
8b93c638 | 1093 | |
8b93c638 JM |
1094 | /* Initialize a stack */ |
1095 | vpush (&stack, NULL); | |
1096 | ||
1097 | /* Push the root's children */ | |
705da579 | 1098 | if ((*varp)->children != NULL) |
8b93c638 JM |
1099 | { |
1100 | struct varobj_child *c; | |
705da579 | 1101 | for (c = (*varp)->children; c != NULL; c = c->next) |
8b93c638 JM |
1102 | vpush (&stack, c->child); |
1103 | } | |
1104 | ||
1105 | /* Walk through the children, reconstructing them all. */ | |
1106 | v = vpop (&stack); | |
1107 | while (v != NULL) | |
1108 | { | |
1109 | /* Push any children */ | |
1110 | if (v->children != NULL) | |
1111 | { | |
1112 | struct varobj_child *c; | |
1113 | for (c = v->children; c != NULL; c = c->next) | |
1114 | vpush (&stack, c->child); | |
1115 | } | |
1116 | ||
1117 | /* Update this variable */ | |
1118 | new = value_of_child (v->parent, v->index); | |
acd65feb VP |
1119 | if (install_new_value (v, new, 0 /* type not changed */)) |
1120 | { | |
8b93c638 JM |
1121 | /* Note that it's changed */ |
1122 | vpush (&result, v); | |
fb9b6b35 | 1123 | v->updated = 0; |
8b93c638 JM |
1124 | changed++; |
1125 | } | |
8b93c638 JM |
1126 | |
1127 | /* Get next child */ | |
1128 | v = vpop (&stack); | |
1129 | } | |
1130 | ||
1131 | /* Alloc (changed + 1) list entries */ | |
1132 | /* FIXME: add a cleanup for the allocated list(s) | |
1133 | because one day the select_frame called below can longjump */ | |
1134 | *changelist = xmalloc ((changed + 1) * sizeof (struct varobj *)); | |
1135 | if (changed > 1) | |
1136 | { | |
1137 | templist = xmalloc ((changed + 1) * sizeof (struct varobj *)); | |
1138 | cv = templist; | |
1139 | } | |
1140 | else | |
1141 | cv = *changelist; | |
1142 | ||
1143 | /* Copy from result stack to list */ | |
1144 | vleft = changed; | |
1145 | *cv = vpop (&result); | |
1146 | while ((*cv != NULL) && (vleft > 0)) | |
1147 | { | |
1148 | vleft--; | |
1149 | cv++; | |
1150 | *cv = vpop (&result); | |
1151 | } | |
1152 | if (vleft) | |
8a3fe4f8 | 1153 | warning (_("varobj_update: assertion failed - vleft <> 0")); |
8b93c638 JM |
1154 | |
1155 | if (changed > 1) | |
1156 | { | |
1157 | /* Now we revert the order. */ | |
72330bd6 AC |
1158 | for (i = 0; i < changed; i++) |
1159 | *(*changelist + i) = *(templist + changed - 1 - i); | |
8b93c638 JM |
1160 | *(*changelist + changed) = NULL; |
1161 | } | |
1162 | ||
73a93a32 JI |
1163 | if (type_changed) |
1164 | return -2; | |
1165 | else | |
1166 | return changed; | |
8b93c638 JM |
1167 | } |
1168 | \f | |
1169 | ||
1170 | /* Helper functions */ | |
1171 | ||
1172 | /* | |
1173 | * Variable object construction/destruction | |
1174 | */ | |
1175 | ||
1176 | static int | |
fba45db2 KB |
1177 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1178 | int only_children_p) | |
8b93c638 JM |
1179 | { |
1180 | int delcount = 0; | |
1181 | ||
1182 | delete_variable_1 (resultp, &delcount, var, | |
1183 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1184 | ||
1185 | return delcount; | |
1186 | } | |
1187 | ||
1188 | /* Delete the variable object VAR and its children */ | |
1189 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1190 | and the parent is not removed we dump core. It must be always | |
1191 | initially called with remove_from_parent_p set */ | |
1192 | static void | |
72330bd6 AC |
1193 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1194 | struct varobj *var, int only_children_p, | |
1195 | int remove_from_parent_p) | |
8b93c638 JM |
1196 | { |
1197 | struct varobj_child *vc; | |
1198 | struct varobj_child *next; | |
1199 | ||
1200 | /* Delete any children of this variable, too. */ | |
1201 | for (vc = var->children; vc != NULL; vc = next) | |
1202 | { | |
1203 | if (!remove_from_parent_p) | |
1204 | vc->child->parent = NULL; | |
1205 | delete_variable_1 (resultp, delcountp, vc->child, 0, only_children_p); | |
1206 | next = vc->next; | |
b8c9b27d | 1207 | xfree (vc); |
8b93c638 JM |
1208 | } |
1209 | ||
1210 | /* if we were called to delete only the children we are done here */ | |
1211 | if (only_children_p) | |
1212 | return; | |
1213 | ||
1214 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1215 | /* If the name is null, this is a temporary variable, that has not |
1216 | yet been installed, don't report it, it belongs to the caller... */ | |
1217 | if (var->obj_name != NULL) | |
8b93c638 | 1218 | { |
5b616ba1 | 1219 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1220 | *delcountp = *delcountp + 1; |
1221 | } | |
1222 | ||
1223 | /* If this variable has a parent, remove it from its parent's list */ | |
1224 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1225 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1226 | expensive list search to find the element to remove when we are | |
1227 | discarding the list afterwards */ | |
72330bd6 | 1228 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 JM |
1229 | { |
1230 | remove_child_from_parent (var->parent, var); | |
1231 | } | |
72330bd6 | 1232 | |
73a93a32 JI |
1233 | if (var->obj_name != NULL) |
1234 | uninstall_variable (var); | |
8b93c638 JM |
1235 | |
1236 | /* Free memory associated with this variable */ | |
1237 | free_variable (var); | |
1238 | } | |
1239 | ||
1240 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1241 | static int | |
fba45db2 | 1242 | install_variable (struct varobj *var) |
8b93c638 JM |
1243 | { |
1244 | struct vlist *cv; | |
1245 | struct vlist *newvl; | |
1246 | const char *chp; | |
1247 | unsigned int index = 0; | |
1248 | unsigned int i = 1; | |
1249 | ||
1250 | for (chp = var->obj_name; *chp; chp++) | |
1251 | { | |
1252 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1253 | } | |
1254 | ||
1255 | cv = *(varobj_table + index); | |
1256 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1257 | cv = cv->next; | |
1258 | ||
1259 | if (cv != NULL) | |
8a3fe4f8 | 1260 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1261 | |
1262 | /* Add varobj to hash table */ | |
1263 | newvl = xmalloc (sizeof (struct vlist)); | |
1264 | newvl->next = *(varobj_table + index); | |
1265 | newvl->var = var; | |
1266 | *(varobj_table + index) = newvl; | |
1267 | ||
1268 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1269 | if (is_root_p (var)) |
8b93c638 JM |
1270 | { |
1271 | /* Add to list of root variables */ | |
1272 | if (rootlist == NULL) | |
1273 | var->root->next = NULL; | |
1274 | else | |
1275 | var->root->next = rootlist; | |
1276 | rootlist = var->root; | |
1277 | rootcount++; | |
1278 | } | |
1279 | ||
1280 | return 1; /* OK */ | |
1281 | } | |
1282 | ||
1283 | /* Unistall the object VAR. */ | |
1284 | static void | |
fba45db2 | 1285 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1286 | { |
1287 | struct vlist *cv; | |
1288 | struct vlist *prev; | |
1289 | struct varobj_root *cr; | |
1290 | struct varobj_root *prer; | |
1291 | const char *chp; | |
1292 | unsigned int index = 0; | |
1293 | unsigned int i = 1; | |
1294 | ||
1295 | /* Remove varobj from hash table */ | |
1296 | for (chp = var->obj_name; *chp; chp++) | |
1297 | { | |
1298 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1299 | } | |
1300 | ||
1301 | cv = *(varobj_table + index); | |
1302 | prev = NULL; | |
1303 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1304 | { | |
1305 | prev = cv; | |
1306 | cv = cv->next; | |
1307 | } | |
1308 | ||
1309 | if (varobjdebug) | |
1310 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1311 | ||
1312 | if (cv == NULL) | |
1313 | { | |
72330bd6 AC |
1314 | warning |
1315 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1316 | var->obj_name); | |
8b93c638 JM |
1317 | return; |
1318 | } | |
1319 | ||
1320 | if (prev == NULL) | |
1321 | *(varobj_table + index) = cv->next; | |
1322 | else | |
1323 | prev->next = cv->next; | |
1324 | ||
b8c9b27d | 1325 | xfree (cv); |
8b93c638 JM |
1326 | |
1327 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1328 | if (is_root_p (var)) |
8b93c638 JM |
1329 | { |
1330 | /* Remove from list of root variables */ | |
1331 | if (rootlist == var->root) | |
1332 | rootlist = var->root->next; | |
1333 | else | |
1334 | { | |
1335 | prer = NULL; | |
1336 | cr = rootlist; | |
1337 | while ((cr != NULL) && (cr->rootvar != var)) | |
1338 | { | |
1339 | prer = cr; | |
1340 | cr = cr->next; | |
1341 | } | |
1342 | if (cr == NULL) | |
1343 | { | |
72330bd6 AC |
1344 | warning |
1345 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1346 | var->obj_name); | |
8b93c638 JM |
1347 | return; |
1348 | } | |
1349 | if (prer == NULL) | |
1350 | rootlist = NULL; | |
1351 | else | |
1352 | prer->next = cr->next; | |
1353 | } | |
1354 | rootcount--; | |
1355 | } | |
1356 | ||
1357 | } | |
1358 | ||
1359 | /* Does a child with the name NAME exist in VAR? If so, return its data. | |
1360 | If not, return NULL. */ | |
1361 | static struct varobj * | |
1669605f | 1362 | child_exists (struct varobj *var, char *name) |
8b93c638 JM |
1363 | { |
1364 | struct varobj_child *vc; | |
1365 | ||
1366 | for (vc = var->children; vc != NULL; vc = vc->next) | |
1367 | { | |
6e382aa3 | 1368 | if (strcmp (vc->child->name, name) == 0) |
8b93c638 JM |
1369 | return vc->child; |
1370 | } | |
1371 | ||
1372 | return NULL; | |
1373 | } | |
1374 | ||
1375 | /* Create and install a child of the parent of the given name */ | |
1376 | static struct varobj * | |
fba45db2 | 1377 | create_child (struct varobj *parent, int index, char *name) |
8b93c638 JM |
1378 | { |
1379 | struct varobj *child; | |
1380 | char *childs_name; | |
acd65feb | 1381 | struct value *value; |
8b93c638 JM |
1382 | |
1383 | child = new_variable (); | |
1384 | ||
1385 | /* name is allocated by name_of_child */ | |
1386 | child->name = name; | |
1387 | child->index = index; | |
acd65feb | 1388 | value = value_of_child (parent, index); |
8b93c638 JM |
1389 | child->parent = parent; |
1390 | child->root = parent->root; | |
b435e160 | 1391 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1392 | child->obj_name = childs_name; |
1393 | install_variable (child); | |
1394 | ||
1395 | /* Save a pointer to this child in the parent */ | |
1396 | save_child_in_parent (parent, child); | |
1397 | ||
acd65feb VP |
1398 | /* Compute the type of the child. Must do this before |
1399 | calling install_new_value. */ | |
1400 | if (value != NULL) | |
1401 | /* If the child had no evaluation errors, var->value | |
1402 | will be non-NULL and contain a valid type. */ | |
1403 | child->type = value_type (value); | |
1404 | else | |
1405 | /* Otherwise, we must compute the type. */ | |
1406 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1407 | child->index); | |
1408 | install_new_value (child, value, 1); | |
1409 | ||
1410 | if ((!CPLUS_FAKE_CHILD (child) && child->value == NULL) || parent->error) | |
1411 | child->error = 1; | |
8b93c638 JM |
1412 | |
1413 | return child; | |
1414 | } | |
1415 | ||
1416 | /* FIXME: This should be a generic add to list */ | |
1417 | /* Save CHILD in the PARENT's data. */ | |
1418 | static void | |
fba45db2 | 1419 | save_child_in_parent (struct varobj *parent, struct varobj *child) |
8b93c638 JM |
1420 | { |
1421 | struct varobj_child *vc; | |
1422 | ||
1423 | /* Insert the child at the top */ | |
1424 | vc = parent->children; | |
1425 | parent->children = | |
1426 | (struct varobj_child *) xmalloc (sizeof (struct varobj_child)); | |
1427 | ||
1428 | parent->children->next = vc; | |
1429 | parent->children->child = child; | |
1430 | } | |
1431 | ||
1432 | /* FIXME: This should be a generic remove from list */ | |
1433 | /* Remove the CHILD from the PARENT's list of children. */ | |
1434 | static void | |
fba45db2 | 1435 | remove_child_from_parent (struct varobj *parent, struct varobj *child) |
8b93c638 JM |
1436 | { |
1437 | struct varobj_child *vc, *prev; | |
1438 | ||
1439 | /* Find the child in the parent's list */ | |
1440 | prev = NULL; | |
1441 | for (vc = parent->children; vc != NULL;) | |
1442 | { | |
1443 | if (vc->child == child) | |
1444 | break; | |
1445 | prev = vc; | |
1446 | vc = vc->next; | |
1447 | } | |
1448 | ||
1449 | if (prev == NULL) | |
1450 | parent->children = vc->next; | |
1451 | else | |
1452 | prev->next = vc->next; | |
1453 | ||
1454 | } | |
1455 | \f | |
1456 | ||
1457 | /* | |
1458 | * Miscellaneous utility functions. | |
1459 | */ | |
1460 | ||
1461 | /* Allocate memory and initialize a new variable */ | |
1462 | static struct varobj * | |
1463 | new_variable (void) | |
1464 | { | |
1465 | struct varobj *var; | |
1466 | ||
1467 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1468 | var->name = NULL; | |
1469 | var->obj_name = NULL; | |
1470 | var->index = -1; | |
1471 | var->type = NULL; | |
1472 | var->value = NULL; | |
1473 | var->error = 0; | |
1474 | var->num_children = -1; | |
1475 | var->parent = NULL; | |
1476 | var->children = NULL; | |
1477 | var->format = 0; | |
1478 | var->root = NULL; | |
fb9b6b35 | 1479 | var->updated = 0; |
8b93c638 JM |
1480 | |
1481 | return var; | |
1482 | } | |
1483 | ||
1484 | /* Allocate memory and initialize a new root variable */ | |
1485 | static struct varobj * | |
1486 | new_root_variable (void) | |
1487 | { | |
1488 | struct varobj *var = new_variable (); | |
1489 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1490 | var->root->lang = NULL; | |
1491 | var->root->exp = NULL; | |
1492 | var->root->valid_block = NULL; | |
7a424e99 | 1493 | var->root->frame = null_frame_id; |
73a93a32 | 1494 | var->root->use_selected_frame = 0; |
8b93c638 JM |
1495 | var->root->rootvar = NULL; |
1496 | ||
1497 | return var; | |
1498 | } | |
1499 | ||
1500 | /* Free any allocated memory associated with VAR. */ | |
1501 | static void | |
fba45db2 | 1502 | free_variable (struct varobj *var) |
8b93c638 JM |
1503 | { |
1504 | /* Free the expression if this is a root variable. */ | |
b2c2bd75 | 1505 | if (is_root_p (var)) |
8b93c638 | 1506 | { |
96c1eda2 | 1507 | free_current_contents (&var->root->exp); |
8038e1e2 | 1508 | xfree (var->root); |
8b93c638 JM |
1509 | } |
1510 | ||
8038e1e2 AC |
1511 | xfree (var->name); |
1512 | xfree (var->obj_name); | |
1513 | xfree (var); | |
8b93c638 JM |
1514 | } |
1515 | ||
74b7792f AC |
1516 | static void |
1517 | do_free_variable_cleanup (void *var) | |
1518 | { | |
1519 | free_variable (var); | |
1520 | } | |
1521 | ||
1522 | static struct cleanup * | |
1523 | make_cleanup_free_variable (struct varobj *var) | |
1524 | { | |
1525 | return make_cleanup (do_free_variable_cleanup, var); | |
1526 | } | |
1527 | ||
6766a268 DJ |
1528 | /* This returns the type of the variable. It also skips past typedefs |
1529 | to return the real type of the variable. | |
94b66fa7 KS |
1530 | |
1531 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1532 | except within get_target_type and get_type. */ | |
8b93c638 | 1533 | static struct type * |
fba45db2 | 1534 | get_type (struct varobj *var) |
8b93c638 JM |
1535 | { |
1536 | struct type *type; | |
1537 | type = var->type; | |
1538 | ||
6766a268 DJ |
1539 | if (type != NULL) |
1540 | type = check_typedef (type); | |
8b93c638 JM |
1541 | |
1542 | return type; | |
1543 | } | |
1544 | ||
1545 | /* This returns the type of the variable, dereferencing pointers, too. */ | |
1546 | static struct type * | |
fba45db2 | 1547 | get_type_deref (struct varobj *var) |
8b93c638 JM |
1548 | { |
1549 | struct type *type; | |
1550 | ||
1551 | type = get_type (var); | |
1552 | ||
1553 | if (type != NULL && (TYPE_CODE (type) == TYPE_CODE_PTR | |
1554 | || TYPE_CODE (type) == TYPE_CODE_REF)) | |
1555 | type = get_target_type (type); | |
1556 | ||
1557 | return type; | |
1558 | } | |
1559 | ||
1560 | /* This returns the target type (or NULL) of TYPE, also skipping | |
94b66fa7 KS |
1561 | past typedefs, just like get_type (). |
1562 | ||
1563 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1564 | except within get_target_type and get_type. */ | |
8b93c638 | 1565 | static struct type * |
fba45db2 | 1566 | get_target_type (struct type *type) |
8b93c638 JM |
1567 | { |
1568 | if (type != NULL) | |
1569 | { | |
1570 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1571 | if (type != NULL) |
1572 | type = check_typedef (type); | |
8b93c638 JM |
1573 | } |
1574 | ||
1575 | return type; | |
1576 | } | |
1577 | ||
1578 | /* What is the default display for this variable? We assume that | |
1579 | everything is "natural". Any exceptions? */ | |
1580 | static enum varobj_display_formats | |
fba45db2 | 1581 | variable_default_display (struct varobj *var) |
8b93c638 JM |
1582 | { |
1583 | return FORMAT_NATURAL; | |
1584 | } | |
1585 | ||
8b93c638 JM |
1586 | /* FIXME: The following should be generic for any pointer */ |
1587 | static void | |
fba45db2 | 1588 | vpush (struct vstack **pstack, struct varobj *var) |
8b93c638 JM |
1589 | { |
1590 | struct vstack *s; | |
1591 | ||
1592 | s = (struct vstack *) xmalloc (sizeof (struct vstack)); | |
1593 | s->var = var; | |
1594 | s->next = *pstack; | |
1595 | *pstack = s; | |
1596 | } | |
1597 | ||
1598 | /* FIXME: The following should be generic for any pointer */ | |
1599 | static struct varobj * | |
fba45db2 | 1600 | vpop (struct vstack **pstack) |
8b93c638 JM |
1601 | { |
1602 | struct vstack *s; | |
1603 | struct varobj *v; | |
1604 | ||
1605 | if ((*pstack)->var == NULL && (*pstack)->next == NULL) | |
1606 | return NULL; | |
1607 | ||
1608 | s = *pstack; | |
1609 | v = s->var; | |
1610 | *pstack = (*pstack)->next; | |
b8c9b27d | 1611 | xfree (s); |
8b93c638 JM |
1612 | |
1613 | return v; | |
1614 | } | |
1615 | ||
1616 | /* FIXME: The following should be generic for any pointer */ | |
1617 | static void | |
fba45db2 | 1618 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
1619 | { |
1620 | struct cpstack *s; | |
1621 | ||
1622 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1623 | s->name = name; | |
1624 | s->next = *pstack; | |
1625 | *pstack = s; | |
1626 | } | |
1627 | ||
1628 | /* FIXME: The following should be generic for any pointer */ | |
1629 | static char * | |
fba45db2 | 1630 | cppop (struct cpstack **pstack) |
8b93c638 JM |
1631 | { |
1632 | struct cpstack *s; | |
1633 | char *v; | |
1634 | ||
1635 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1636 | return NULL; | |
1637 | ||
1638 | s = *pstack; | |
1639 | v = s->name; | |
1640 | *pstack = (*pstack)->next; | |
b8c9b27d | 1641 | xfree (s); |
8b93c638 JM |
1642 | |
1643 | return v; | |
1644 | } | |
1645 | \f | |
1646 | /* | |
1647 | * Language-dependencies | |
1648 | */ | |
1649 | ||
1650 | /* Common entry points */ | |
1651 | ||
1652 | /* Get the language of variable VAR. */ | |
1653 | static enum varobj_languages | |
fba45db2 | 1654 | variable_language (struct varobj *var) |
8b93c638 JM |
1655 | { |
1656 | enum varobj_languages lang; | |
1657 | ||
1658 | switch (var->root->exp->language_defn->la_language) | |
1659 | { | |
1660 | default: | |
1661 | case language_c: | |
1662 | lang = vlang_c; | |
1663 | break; | |
1664 | case language_cplus: | |
1665 | lang = vlang_cplus; | |
1666 | break; | |
1667 | case language_java: | |
1668 | lang = vlang_java; | |
1669 | break; | |
1670 | } | |
1671 | ||
1672 | return lang; | |
1673 | } | |
1674 | ||
1675 | /* Return the number of children for a given variable. | |
1676 | The result of this function is defined by the language | |
1677 | implementation. The number of children returned by this function | |
1678 | is the number of children that the user will see in the variable | |
1679 | display. */ | |
1680 | static int | |
fba45db2 | 1681 | number_of_children (struct varobj *var) |
8b93c638 JM |
1682 | { |
1683 | return (*var->root->lang->number_of_children) (var);; | |
1684 | } | |
1685 | ||
1686 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1687 | static char * | |
fba45db2 | 1688 | name_of_variable (struct varobj *var) |
8b93c638 JM |
1689 | { |
1690 | return (*var->root->lang->name_of_variable) (var); | |
1691 | } | |
1692 | ||
1693 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1694 | static char * | |
fba45db2 | 1695 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
1696 | { |
1697 | return (*var->root->lang->name_of_child) (var, index); | |
1698 | } | |
1699 | ||
30b28db1 | 1700 | /* What is the ``struct value *'' of the root variable VAR? |
73a93a32 JI |
1701 | TYPE_CHANGED controls what to do if the type of a |
1702 | use_selected_frame = 1 variable changes. On input, | |
1703 | TYPE_CHANGED = 1 means discard the old varobj, and replace | |
1704 | it with this one. TYPE_CHANGED = 0 means leave it around. | |
1705 | NB: In both cases, var_handle will point to the new varobj, | |
1706 | so if you use TYPE_CHANGED = 0, you will have to stash the | |
1707 | old varobj pointer away somewhere before calling this. | |
1708 | On return, TYPE_CHANGED will be 1 if the type has changed, and | |
1709 | 0 otherwise. */ | |
30b28db1 | 1710 | static struct value * |
fba45db2 | 1711 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 1712 | { |
73a93a32 JI |
1713 | struct varobj *var; |
1714 | ||
1715 | if (var_handle == NULL) | |
1716 | return NULL; | |
1717 | ||
1718 | var = *var_handle; | |
1719 | ||
1720 | /* This should really be an exception, since this should | |
1721 | only get called with a root variable. */ | |
1722 | ||
b2c2bd75 | 1723 | if (!is_root_p (var)) |
73a93a32 JI |
1724 | return NULL; |
1725 | ||
1726 | if (var->root->use_selected_frame) | |
1727 | { | |
1728 | struct varobj *tmp_var; | |
1729 | char *old_type, *new_type; | |
1730 | old_type = varobj_get_type (var); | |
1731 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
1732 | USE_SELECTED_FRAME); | |
1733 | if (tmp_var == NULL) | |
1734 | { | |
1735 | return NULL; | |
1736 | } | |
1737 | new_type = varobj_get_type (tmp_var); | |
72330bd6 | 1738 | if (strcmp (old_type, new_type) == 0) |
73a93a32 JI |
1739 | { |
1740 | varobj_delete (tmp_var, NULL, 0); | |
1741 | *type_changed = 0; | |
1742 | } | |
1743 | else | |
1744 | { | |
1745 | if (*type_changed) | |
1746 | { | |
72330bd6 | 1747 | tmp_var->obj_name = |
73a93a32 | 1748 | savestring (var->obj_name, strlen (var->obj_name)); |
f7635dd9 | 1749 | varobj_delete (var, NULL, 0); |
73a93a32 JI |
1750 | } |
1751 | else | |
1752 | { | |
72330bd6 | 1753 | tmp_var->obj_name = varobj_gen_name (); |
73a93a32 JI |
1754 | } |
1755 | install_variable (tmp_var); | |
1756 | *var_handle = tmp_var; | |
705da579 | 1757 | var = *var_handle; |
73a93a32 JI |
1758 | *type_changed = 1; |
1759 | } | |
1760 | } | |
1761 | else | |
1762 | { | |
1763 | *type_changed = 0; | |
1764 | } | |
1765 | ||
1766 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1767 | } |
1768 | ||
30b28db1 AC |
1769 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
1770 | static struct value * | |
fba45db2 | 1771 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 1772 | { |
30b28db1 | 1773 | struct value *value; |
8b93c638 JM |
1774 | |
1775 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1776 | ||
8b93c638 JM |
1777 | return value; |
1778 | } | |
1779 | ||
8b93c638 JM |
1780 | /* Is this variable editable? Use the variable's type to make |
1781 | this determination. */ | |
1782 | static int | |
fba45db2 | 1783 | variable_editable (struct varobj *var) |
8b93c638 JM |
1784 | { |
1785 | return (*var->root->lang->variable_editable) (var); | |
1786 | } | |
1787 | ||
1788 | /* GDB already has a command called "value_of_variable". Sigh. */ | |
1789 | static char * | |
fba45db2 | 1790 | my_value_of_variable (struct varobj *var) |
8b93c638 JM |
1791 | { |
1792 | return (*var->root->lang->value_of_variable) (var); | |
1793 | } | |
1794 | ||
acd65feb VP |
1795 | /* Return non-zero if changes in value of VAR |
1796 | must be detected and reported by -var-update. | |
1797 | Return zero is -var-update should never report | |
1798 | changes of such values. This makes sense for structures | |
1799 | (since the changes in children values will be reported separately), | |
1800 | or for artifical objects (like 'public' pseudo-field in C++). | |
1801 | ||
1802 | Return value of 0 means that gdb need not call value_fetch_lazy | |
1803 | for the value of this variable object. */ | |
8b93c638 | 1804 | static int |
b2c2bd75 | 1805 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
1806 | { |
1807 | int r; | |
1808 | struct type *type; | |
1809 | ||
1810 | if (CPLUS_FAKE_CHILD (var)) | |
1811 | return 0; | |
1812 | ||
1813 | type = get_type (var); | |
1814 | ||
1815 | switch (TYPE_CODE (type)) | |
1816 | { | |
72330bd6 AC |
1817 | case TYPE_CODE_STRUCT: |
1818 | case TYPE_CODE_UNION: | |
1819 | case TYPE_CODE_ARRAY: | |
1820 | r = 0; | |
1821 | break; | |
8b93c638 | 1822 | |
72330bd6 AC |
1823 | default: |
1824 | r = 1; | |
8b93c638 JM |
1825 | } |
1826 | ||
1827 | return r; | |
1828 | } | |
1829 | ||
1830 | /* C */ | |
1831 | static int | |
fba45db2 | 1832 | c_number_of_children (struct varobj *var) |
8b93c638 JM |
1833 | { |
1834 | struct type *type; | |
1835 | struct type *target; | |
1836 | int children; | |
1837 | ||
1838 | type = get_type (var); | |
1839 | target = get_target_type (type); | |
1840 | children = 0; | |
1841 | ||
1842 | switch (TYPE_CODE (type)) | |
1843 | { | |
1844 | case TYPE_CODE_ARRAY: | |
1845 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
72330bd6 | 1846 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) |
8b93c638 JM |
1847 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
1848 | else | |
1849 | children = -1; | |
1850 | break; | |
1851 | ||
1852 | case TYPE_CODE_STRUCT: | |
1853 | case TYPE_CODE_UNION: | |
1854 | children = TYPE_NFIELDS (type); | |
1855 | break; | |
1856 | ||
1857 | case TYPE_CODE_PTR: | |
1858 | /* This is where things get compilcated. All pointers have one child. | |
1859 | Except, of course, for struct and union ptr, which we automagically | |
0755e6c1 FN |
1860 | dereference for the user and function ptrs, which have no children. |
1861 | We also don't dereference void* as we don't know what to show. | |
1862 | We can show char* so we allow it to be dereferenced. If you decide | |
1863 | to test for it, please mind that a little magic is necessary to | |
1864 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
1865 | TYPE_NAME == "char" */ | |
1866 | ||
8b93c638 JM |
1867 | switch (TYPE_CODE (target)) |
1868 | { | |
1869 | case TYPE_CODE_STRUCT: | |
1870 | case TYPE_CODE_UNION: | |
1871 | children = TYPE_NFIELDS (target); | |
1872 | break; | |
1873 | ||
1874 | case TYPE_CODE_FUNC: | |
0755e6c1 | 1875 | case TYPE_CODE_VOID: |
8b93c638 JM |
1876 | children = 0; |
1877 | break; | |
1878 | ||
1879 | default: | |
0755e6c1 | 1880 | children = 1; |
8b93c638 JM |
1881 | } |
1882 | break; | |
1883 | ||
1884 | default: | |
1885 | /* Other types have no children */ | |
1886 | break; | |
1887 | } | |
1888 | ||
1889 | return children; | |
1890 | } | |
1891 | ||
1892 | static char * | |
fba45db2 | 1893 | c_name_of_variable (struct varobj *parent) |
8b93c638 JM |
1894 | { |
1895 | return savestring (parent->name, strlen (parent->name)); | |
1896 | } | |
1897 | ||
1898 | static char * | |
fba45db2 | 1899 | c_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
1900 | { |
1901 | struct type *type; | |
1902 | struct type *target; | |
1903 | char *name; | |
1904 | char *string; | |
1905 | ||
1906 | type = get_type (parent); | |
1907 | target = get_target_type (type); | |
1908 | ||
1909 | switch (TYPE_CODE (type)) | |
1910 | { | |
1911 | case TYPE_CODE_ARRAY: | |
7a24eb7c NR |
1912 | name = xstrprintf ("%d", index |
1913 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
8b93c638 JM |
1914 | break; |
1915 | ||
1916 | case TYPE_CODE_STRUCT: | |
1917 | case TYPE_CODE_UNION: | |
1918 | string = TYPE_FIELD_NAME (type, index); | |
1919 | name = savestring (string, strlen (string)); | |
1920 | break; | |
1921 | ||
1922 | case TYPE_CODE_PTR: | |
1923 | switch (TYPE_CODE (target)) | |
1924 | { | |
1925 | case TYPE_CODE_STRUCT: | |
1926 | case TYPE_CODE_UNION: | |
1927 | string = TYPE_FIELD_NAME (target, index); | |
1928 | name = savestring (string, strlen (string)); | |
1929 | break; | |
1930 | ||
1931 | default: | |
b435e160 | 1932 | name = xstrprintf ("*%s", parent->name); |
8b93c638 JM |
1933 | break; |
1934 | } | |
1935 | break; | |
1936 | ||
1937 | default: | |
1938 | /* This should not happen */ | |
1939 | name = xstrdup ("???"); | |
1940 | } | |
1941 | ||
1942 | return name; | |
1943 | } | |
1944 | ||
30b28db1 | 1945 | static struct value * |
fba45db2 | 1946 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 1947 | { |
30b28db1 | 1948 | struct value *new_val; |
73a93a32 | 1949 | struct varobj *var = *var_handle; |
8b93c638 JM |
1950 | struct frame_info *fi; |
1951 | int within_scope; | |
1952 | ||
73a93a32 | 1953 | /* Only root variables can be updated... */ |
b2c2bd75 | 1954 | if (!is_root_p (var)) |
73a93a32 JI |
1955 | /* Not a root var */ |
1956 | return NULL; | |
1957 | ||
72330bd6 | 1958 | |
8b93c638 JM |
1959 | /* Determine whether the variable is still around. */ |
1960 | if (var->root->valid_block == NULL) | |
1961 | within_scope = 1; | |
1962 | else | |
1963 | { | |
1964 | reinit_frame_cache (); | |
e64d9b3d | 1965 | fi = frame_find_by_id (var->root->frame); |
8b93c638 JM |
1966 | within_scope = fi != NULL; |
1967 | /* FIXME: select_frame could fail */ | |
d2353924 NR |
1968 | if (fi) |
1969 | { | |
1970 | CORE_ADDR pc = get_frame_pc (fi); | |
1971 | if (pc < BLOCK_START (var->root->valid_block) || | |
1972 | pc >= BLOCK_END (var->root->valid_block)) | |
1973 | within_scope = 0; | |
1974 | select_frame (fi); | |
1975 | } | |
8b93c638 | 1976 | } |
72330bd6 | 1977 | |
8b93c638 JM |
1978 | if (within_scope) |
1979 | { | |
73a93a32 | 1980 | /* We need to catch errors here, because if evaluate |
72330bd6 AC |
1981 | expression fails we just want to make val->error = 1 and |
1982 | go on */ | |
8b93c638 JM |
1983 | if (gdb_evaluate_expression (var->root->exp, &new_val)) |
1984 | { | |
acd65feb VP |
1985 | var->error = 0; |
1986 | release_value (new_val); | |
8b93c638 JM |
1987 | } |
1988 | else | |
1989 | var->error = 1; | |
72330bd6 | 1990 | |
8b93c638 JM |
1991 | return new_val; |
1992 | } | |
1993 | ||
1994 | return NULL; | |
1995 | } | |
1996 | ||
30b28db1 | 1997 | static struct value * |
fba45db2 | 1998 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 1999 | { |
30b28db1 AC |
2000 | struct value *value; |
2001 | struct value *temp; | |
2002 | struct value *indval; | |
8b93c638 JM |
2003 | struct type *type, *target; |
2004 | char *name; | |
7a24eb7c | 2005 | int real_index; |
8b93c638 JM |
2006 | |
2007 | type = get_type (parent); | |
2008 | target = get_target_type (type); | |
2009 | name = name_of_child (parent, index); | |
2010 | temp = parent->value; | |
2011 | value = NULL; | |
2012 | ||
2013 | if (temp != NULL) | |
2014 | { | |
2015 | switch (TYPE_CODE (type)) | |
2016 | { | |
2017 | case TYPE_CODE_ARRAY: | |
7a24eb7c | 2018 | real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); |
8310b29b | 2019 | #if 0 |
72330bd6 | 2020 | /* This breaks if the array lives in a (vector) register. */ |
7a24eb7c | 2021 | value = value_slice (temp, real_index, 1); |
8b93c638 JM |
2022 | temp = value_coerce_array (value); |
2023 | gdb_value_ind (temp, &value); | |
8310b29b | 2024 | #else |
7a24eb7c | 2025 | indval = value_from_longest (builtin_type_int, (LONGEST) real_index); |
8310b29b FN |
2026 | gdb_value_subscript (temp, indval, &value); |
2027 | #endif | |
8b93c638 JM |
2028 | break; |
2029 | ||
2030 | case TYPE_CODE_STRUCT: | |
2031 | case TYPE_CODE_UNION: | |
7f19b9a2 AC |
2032 | gdb_value_struct_elt (NULL, &value, &temp, NULL, name, NULL, |
2033 | "vstructure"); | |
8b93c638 JM |
2034 | break; |
2035 | ||
2036 | case TYPE_CODE_PTR: | |
2037 | switch (TYPE_CODE (target)) | |
2038 | { | |
2039 | case TYPE_CODE_STRUCT: | |
2040 | case TYPE_CODE_UNION: | |
7f19b9a2 AC |
2041 | gdb_value_struct_elt (NULL, &value, &temp, NULL, name, NULL, |
2042 | "vstructure"); | |
8b93c638 JM |
2043 | break; |
2044 | ||
2045 | default: | |
2046 | gdb_value_ind (temp, &value); | |
2047 | break; | |
2048 | } | |
2049 | break; | |
2050 | ||
2051 | default: | |
2052 | break; | |
2053 | } | |
2054 | } | |
2055 | ||
2056 | if (value != NULL) | |
2057 | release_value (value); | |
2058 | ||
5bbc1a8e | 2059 | xfree (name); |
8b93c638 JM |
2060 | return value; |
2061 | } | |
2062 | ||
2063 | static struct type * | |
fba45db2 | 2064 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2065 | { |
2066 | struct type *type; | |
2067 | char *name = name_of_child (parent, index); | |
2068 | ||
2069 | switch (TYPE_CODE (parent->type)) | |
2070 | { | |
2071 | case TYPE_CODE_ARRAY: | |
94b66fa7 | 2072 | type = get_target_type (parent->type); |
8b93c638 JM |
2073 | break; |
2074 | ||
2075 | case TYPE_CODE_STRUCT: | |
2076 | case TYPE_CODE_UNION: | |
2077 | type = lookup_struct_elt_type (parent->type, name, 0); | |
2078 | break; | |
2079 | ||
2080 | case TYPE_CODE_PTR: | |
94b66fa7 | 2081 | switch (TYPE_CODE (get_target_type (parent->type))) |
8b93c638 JM |
2082 | { |
2083 | case TYPE_CODE_STRUCT: | |
2084 | case TYPE_CODE_UNION: | |
2085 | type = lookup_struct_elt_type (parent->type, name, 0); | |
2086 | break; | |
2087 | ||
2088 | default: | |
94b66fa7 | 2089 | type = get_target_type (parent->type); |
8b93c638 JM |
2090 | break; |
2091 | } | |
2092 | break; | |
2093 | ||
2094 | default: | |
2095 | /* This should not happen as only the above types have children */ | |
8a3fe4f8 | 2096 | warning (_("Child of parent whose type does not allow children")); |
8b93c638 JM |
2097 | /* FIXME: Can we still go on? */ |
2098 | type = NULL; | |
2099 | break; | |
2100 | } | |
2101 | ||
5bbc1a8e | 2102 | xfree (name); |
8b93c638 JM |
2103 | return type; |
2104 | } | |
2105 | ||
2106 | static int | |
fba45db2 | 2107 | c_variable_editable (struct varobj *var) |
8b93c638 JM |
2108 | { |
2109 | switch (TYPE_CODE (get_type (var))) | |
2110 | { | |
2111 | case TYPE_CODE_STRUCT: | |
2112 | case TYPE_CODE_UNION: | |
2113 | case TYPE_CODE_ARRAY: | |
2114 | case TYPE_CODE_FUNC: | |
8b93c638 JM |
2115 | case TYPE_CODE_METHOD: |
2116 | return 0; | |
2117 | break; | |
2118 | ||
2119 | default: | |
2120 | return 1; | |
2121 | break; | |
2122 | } | |
2123 | } | |
2124 | ||
2125 | static char * | |
fba45db2 | 2126 | c_value_of_variable (struct varobj *var) |
8b93c638 | 2127 | { |
14b3d9c9 JB |
2128 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2129 | it will print out its children instead of "{...}". So we need to | |
2130 | catch that case explicitly. */ | |
2131 | struct type *type = get_type (var); | |
e64d9b3d | 2132 | |
14b3d9c9 JB |
2133 | /* Strip top-level references. */ |
2134 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2135 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2136 | ||
2137 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2138 | { |
2139 | case TYPE_CODE_STRUCT: | |
2140 | case TYPE_CODE_UNION: | |
2141 | return xstrdup ("{...}"); | |
2142 | /* break; */ | |
2143 | ||
2144 | case TYPE_CODE_ARRAY: | |
2145 | { | |
e64d9b3d | 2146 | char *number; |
b435e160 | 2147 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2148 | return (number); |
8b93c638 JM |
2149 | } |
2150 | /* break; */ | |
2151 | ||
2152 | default: | |
2153 | { | |
575bbeb6 KS |
2154 | if (var->value == NULL) |
2155 | { | |
2156 | /* This can happen if we attempt to get the value of a struct | |
2157 | member when the parent is an invalid pointer. This is an | |
2158 | error condition, so we should tell the caller. */ | |
2159 | return NULL; | |
2160 | } | |
2161 | else | |
2162 | { | |
e64d9b3d MH |
2163 | long dummy; |
2164 | struct ui_file *stb = mem_fileopen (); | |
2165 | struct cleanup *old_chain = make_cleanup_ui_file_delete (stb); | |
2166 | char *thevalue; | |
2167 | ||
b2c2bd75 | 2168 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2169 | gdb_assert (!value_lazy (var->value)); |
806048c6 DJ |
2170 | common_val_print (var->value, stb, |
2171 | format_code[(int) var->format], 1, 0, 0); | |
575bbeb6 KS |
2172 | thevalue = ui_file_xstrdup (stb, &dummy); |
2173 | do_cleanups (old_chain); | |
8b93c638 JM |
2174 | return thevalue; |
2175 | } | |
e64d9b3d | 2176 | } |
8b93c638 JM |
2177 | } |
2178 | } | |
2179 | \f | |
2180 | ||
2181 | /* C++ */ | |
2182 | ||
2183 | static int | |
fba45db2 | 2184 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2185 | { |
2186 | struct type *type; | |
2187 | int children, dont_know; | |
2188 | ||
2189 | dont_know = 1; | |
2190 | children = 0; | |
2191 | ||
2192 | if (!CPLUS_FAKE_CHILD (var)) | |
2193 | { | |
2194 | type = get_type_deref (var); | |
2195 | ||
2196 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2197 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2198 | { |
2199 | int kids[3]; | |
2200 | ||
2201 | cplus_class_num_children (type, kids); | |
2202 | if (kids[v_public] != 0) | |
2203 | children++; | |
2204 | if (kids[v_private] != 0) | |
2205 | children++; | |
2206 | if (kids[v_protected] != 0) | |
2207 | children++; | |
2208 | ||
2209 | /* Add any baseclasses */ | |
2210 | children += TYPE_N_BASECLASSES (type); | |
2211 | dont_know = 0; | |
2212 | ||
2213 | /* FIXME: save children in var */ | |
2214 | } | |
2215 | } | |
2216 | else | |
2217 | { | |
2218 | int kids[3]; | |
2219 | ||
2220 | type = get_type_deref (var->parent); | |
2221 | ||
2222 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2223 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2224 | children = kids[v_public]; |
6e382aa3 | 2225 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2226 | children = kids[v_private]; |
2227 | else | |
2228 | children = kids[v_protected]; | |
2229 | dont_know = 0; | |
2230 | } | |
2231 | ||
2232 | if (dont_know) | |
2233 | children = c_number_of_children (var); | |
2234 | ||
2235 | return children; | |
2236 | } | |
2237 | ||
2238 | /* Compute # of public, private, and protected variables in this class. | |
2239 | That means we need to descend into all baseclasses and find out | |
2240 | how many are there, too. */ | |
2241 | static void | |
1669605f | 2242 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2243 | { |
2244 | int i; | |
2245 | ||
2246 | children[v_public] = 0; | |
2247 | children[v_private] = 0; | |
2248 | children[v_protected] = 0; | |
2249 | ||
2250 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2251 | { | |
2252 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2253 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2254 | continue; |
2255 | ||
2256 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2257 | children[v_protected]++; | |
2258 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2259 | children[v_private]++; | |
2260 | else | |
2261 | children[v_public]++; | |
2262 | } | |
2263 | } | |
2264 | ||
2265 | static char * | |
fba45db2 | 2266 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2267 | { |
2268 | return c_name_of_variable (parent); | |
2269 | } | |
2270 | ||
2271 | static char * | |
fba45db2 | 2272 | cplus_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2273 | { |
2274 | char *name; | |
2275 | struct type *type; | |
8b93c638 JM |
2276 | |
2277 | if (CPLUS_FAKE_CHILD (parent)) | |
2278 | { | |
2279 | /* Looking for children of public, private, or protected. */ | |
2280 | type = get_type_deref (parent->parent); | |
2281 | } | |
2282 | else | |
2283 | type = get_type_deref (parent); | |
2284 | ||
2285 | name = NULL; | |
2286 | switch (TYPE_CODE (type)) | |
2287 | { | |
2288 | case TYPE_CODE_STRUCT: | |
2289 | case TYPE_CODE_UNION: | |
8b93c638 JM |
2290 | if (CPLUS_FAKE_CHILD (parent)) |
2291 | { | |
6e382aa3 JJ |
2292 | /* The fields of the class type are ordered as they |
2293 | appear in the class. We are given an index for a | |
2294 | particular access control type ("public","protected", | |
2295 | or "private"). We must skip over fields that don't | |
2296 | have the access control we are looking for to properly | |
2297 | find the indexed field. */ | |
2298 | int type_index = TYPE_N_BASECLASSES (type); | |
2299 | if (strcmp (parent->name, "private") == 0) | |
2300 | { | |
2301 | while (index >= 0) | |
2302 | { | |
2303 | if (TYPE_VPTR_BASETYPE (type) == type | |
2304 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2305 | ; /* ignore vptr */ | |
2306 | else if (TYPE_FIELD_PRIVATE (type, type_index)) | |
2307 | --index; | |
2308 | ++type_index; | |
2309 | } | |
2310 | --type_index; | |
2311 | } | |
2312 | else if (strcmp (parent->name, "protected") == 0) | |
2313 | { | |
2314 | while (index >= 0) | |
2315 | { | |
2316 | if (TYPE_VPTR_BASETYPE (type) == type | |
2317 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2318 | ; /* ignore vptr */ | |
2319 | else if (TYPE_FIELD_PROTECTED (type, type_index)) | |
2320 | --index; | |
2321 | ++type_index; | |
2322 | } | |
2323 | --type_index; | |
2324 | } | |
2325 | else | |
2326 | { | |
2327 | while (index >= 0) | |
2328 | { | |
2329 | if (TYPE_VPTR_BASETYPE (type) == type | |
2330 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2331 | ; /* ignore vptr */ | |
2332 | else if (!TYPE_FIELD_PRIVATE (type, type_index) && | |
2333 | !TYPE_FIELD_PROTECTED (type, type_index)) | |
2334 | --index; | |
2335 | ++type_index; | |
2336 | } | |
2337 | --type_index; | |
2338 | } | |
2339 | ||
2340 | name = TYPE_FIELD_NAME (type, type_index); | |
8b93c638 JM |
2341 | } |
2342 | else if (index < TYPE_N_BASECLASSES (type)) | |
6e382aa3 | 2343 | /* We are looking up the name of a base class */ |
8b93c638 JM |
2344 | name = TYPE_FIELD_NAME (type, index); |
2345 | else | |
2346 | { | |
6e382aa3 JJ |
2347 | int children[3]; |
2348 | cplus_class_num_children(type, children); | |
2349 | ||
8b93c638 | 2350 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2351 | only be "public", "private", or "protected" |
2352 | ||
2353 | The special "fake" children are always output by varobj in | |
2354 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2355 | index -= TYPE_N_BASECLASSES (type); |
2356 | switch (index) | |
2357 | { | |
2358 | case 0: | |
6e382aa3 JJ |
2359 | if (children[v_public] > 0) |
2360 | name = "public"; | |
2361 | else if (children[v_private] > 0) | |
2362 | name = "private"; | |
2363 | else | |
2364 | name = "protected"; | |
2365 | break; | |
8b93c638 | 2366 | case 1: |
6e382aa3 | 2367 | if (children[v_public] > 0) |
8b93c638 | 2368 | { |
6e382aa3 JJ |
2369 | if (children[v_private] > 0) |
2370 | name = "private"; | |
2371 | else | |
2372 | name = "protected"; | |
8b93c638 | 2373 | } |
6e382aa3 JJ |
2374 | else if (children[v_private] > 0) |
2375 | name = "protected"; | |
2376 | break; | |
8b93c638 | 2377 | case 2: |
6e382aa3 JJ |
2378 | /* Must be protected */ |
2379 | name = "protected"; | |
2380 | break; | |
8b93c638 JM |
2381 | default: |
2382 | /* error! */ | |
2383 | break; | |
2384 | } | |
2385 | } | |
2386 | break; | |
2387 | ||
2388 | default: | |
2389 | break; | |
2390 | } | |
2391 | ||
2392 | if (name == NULL) | |
2393 | return c_name_of_child (parent, index); | |
2394 | else | |
2395 | { | |
2396 | if (name != NULL) | |
2397 | name = savestring (name, strlen (name)); | |
2398 | } | |
2399 | ||
2400 | return name; | |
2401 | } | |
2402 | ||
30b28db1 | 2403 | static struct value * |
fba45db2 | 2404 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2405 | { |
73a93a32 | 2406 | return c_value_of_root (var_handle); |
8b93c638 JM |
2407 | } |
2408 | ||
30b28db1 | 2409 | static struct value * |
fba45db2 | 2410 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2411 | { |
2412 | struct type *type; | |
30b28db1 | 2413 | struct value *value; |
8b93c638 JM |
2414 | |
2415 | if (CPLUS_FAKE_CHILD (parent)) | |
2416 | type = get_type_deref (parent->parent); | |
2417 | else | |
2418 | type = get_type_deref (parent); | |
2419 | ||
2420 | value = NULL; | |
8b93c638 JM |
2421 | |
2422 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
2423 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) | |
2424 | { | |
2425 | if (CPLUS_FAKE_CHILD (parent)) | |
2426 | { | |
5bbc1a8e | 2427 | char *name; |
30b28db1 | 2428 | struct value *temp = parent->parent->value; |
30c6b1fb | 2429 | |
575bbeb6 KS |
2430 | if (temp == NULL) |
2431 | return NULL; | |
2432 | ||
5bbc1a8e | 2433 | name = name_of_child (parent, index); |
30c6b1fb KS |
2434 | gdb_value_struct_elt (NULL, &value, &temp, NULL, name, NULL, |
2435 | "cplus_structure"); | |
2436 | if (value != NULL) | |
2437 | release_value (value); | |
5bbc1a8e KS |
2438 | |
2439 | xfree (name); | |
8b93c638 JM |
2440 | } |
2441 | else if (index >= TYPE_N_BASECLASSES (type)) | |
2442 | { | |
2443 | /* public, private, or protected */ | |
2444 | return NULL; | |
2445 | } | |
2446 | else | |
2447 | { | |
2448 | /* Baseclass */ | |
2449 | if (parent->value != NULL) | |
2450 | { | |
575bbeb6 | 2451 | struct value *temp = NULL; |
8b93c638 | 2452 | |
4ae4f4fb VP |
2453 | /* No special processing for references is needed -- |
2454 | value_cast below handles references. */ | |
2455 | if (TYPE_CODE (value_type (parent->value)) == TYPE_CODE_PTR) | |
4abb499e KS |
2456 | { |
2457 | if (!gdb_value_ind (parent->value, &temp)) | |
2458 | return NULL; | |
2459 | } | |
8b93c638 JM |
2460 | else |
2461 | temp = parent->value; | |
2462 | ||
575bbeb6 KS |
2463 | if (temp != NULL) |
2464 | { | |
2465 | value = value_cast (TYPE_FIELD_TYPE (type, index), temp); | |
2466 | release_value (value); | |
2467 | } | |
2468 | else | |
2469 | { | |
2470 | /* We failed to evaluate the parent's value, so don't even | |
2471 | bother trying to evaluate this child. */ | |
2472 | return NULL; | |
2473 | } | |
8b93c638 JM |
2474 | } |
2475 | } | |
2476 | } | |
2477 | ||
2478 | if (value == NULL) | |
2479 | return c_value_of_child (parent, index); | |
2480 | ||
2481 | return value; | |
2482 | } | |
2483 | ||
2484 | static struct type * | |
fba45db2 | 2485 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2486 | { |
2487 | struct type *type, *t; | |
2488 | ||
575bbeb6 KS |
2489 | if (CPLUS_FAKE_CHILD (parent)) |
2490 | { | |
2491 | /* Looking for the type of a child of public, private, or protected. */ | |
2492 | t = get_type_deref (parent->parent); | |
2493 | } | |
2494 | else | |
2495 | t = get_type_deref (parent); | |
2496 | ||
8b93c638 JM |
2497 | type = NULL; |
2498 | switch (TYPE_CODE (t)) | |
2499 | { | |
2500 | case TYPE_CODE_STRUCT: | |
2501 | case TYPE_CODE_UNION: | |
575bbeb6 | 2502 | if (CPLUS_FAKE_CHILD (parent)) |
8b93c638 | 2503 | { |
575bbeb6 KS |
2504 | char *name = cplus_name_of_child (parent, index); |
2505 | type = lookup_struct_elt_type (t, name, 0); | |
2506 | xfree (name); | |
8b93c638 | 2507 | } |
575bbeb6 KS |
2508 | else if (index < TYPE_N_BASECLASSES (t)) |
2509 | type = TYPE_FIELD_TYPE (t, index); | |
8b93c638 JM |
2510 | else |
2511 | { | |
575bbeb6 KS |
2512 | /* special */ |
2513 | return NULL; | |
8b93c638 JM |
2514 | } |
2515 | break; | |
2516 | ||
2517 | default: | |
2518 | break; | |
2519 | } | |
2520 | ||
2521 | if (type == NULL) | |
2522 | return c_type_of_child (parent, index); | |
2523 | ||
2524 | return type; | |
2525 | } | |
2526 | ||
2527 | static int | |
fba45db2 | 2528 | cplus_variable_editable (struct varobj *var) |
8b93c638 JM |
2529 | { |
2530 | if (CPLUS_FAKE_CHILD (var)) | |
2531 | return 0; | |
2532 | ||
2533 | return c_variable_editable (var); | |
2534 | } | |
2535 | ||
2536 | static char * | |
fba45db2 | 2537 | cplus_value_of_variable (struct varobj *var) |
8b93c638 JM |
2538 | { |
2539 | ||
2540 | /* If we have one of our special types, don't print out | |
2541 | any value. */ | |
2542 | if (CPLUS_FAKE_CHILD (var)) | |
2543 | return xstrdup (""); | |
2544 | ||
2545 | return c_value_of_variable (var); | |
2546 | } | |
2547 | \f | |
2548 | /* Java */ | |
2549 | ||
2550 | static int | |
fba45db2 | 2551 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2552 | { |
2553 | return cplus_number_of_children (var); | |
2554 | } | |
2555 | ||
2556 | static char * | |
fba45db2 | 2557 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2558 | { |
2559 | char *p, *name; | |
2560 | ||
2561 | name = cplus_name_of_variable (parent); | |
2562 | /* If the name has "-" in it, it is because we | |
2563 | needed to escape periods in the name... */ | |
2564 | p = name; | |
2565 | ||
2566 | while (*p != '\000') | |
2567 | { | |
2568 | if (*p == '-') | |
2569 | *p = '.'; | |
2570 | p++; | |
2571 | } | |
2572 | ||
2573 | return name; | |
2574 | } | |
2575 | ||
2576 | static char * | |
fba45db2 | 2577 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2578 | { |
2579 | char *name, *p; | |
2580 | ||
2581 | name = cplus_name_of_child (parent, index); | |
2582 | /* Escape any periods in the name... */ | |
2583 | p = name; | |
2584 | ||
2585 | while (*p != '\000') | |
2586 | { | |
2587 | if (*p == '.') | |
2588 | *p = '-'; | |
2589 | p++; | |
2590 | } | |
2591 | ||
2592 | return name; | |
2593 | } | |
2594 | ||
30b28db1 | 2595 | static struct value * |
fba45db2 | 2596 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2597 | { |
73a93a32 | 2598 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2599 | } |
2600 | ||
30b28db1 | 2601 | static struct value * |
fba45db2 | 2602 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2603 | { |
2604 | return cplus_value_of_child (parent, index); | |
2605 | } | |
2606 | ||
2607 | static struct type * | |
fba45db2 | 2608 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2609 | { |
2610 | return cplus_type_of_child (parent, index); | |
2611 | } | |
2612 | ||
2613 | static int | |
fba45db2 | 2614 | java_variable_editable (struct varobj *var) |
8b93c638 JM |
2615 | { |
2616 | return cplus_variable_editable (var); | |
2617 | } | |
2618 | ||
2619 | static char * | |
fba45db2 | 2620 | java_value_of_variable (struct varobj *var) |
8b93c638 JM |
2621 | { |
2622 | return cplus_value_of_variable (var); | |
2623 | } | |
2624 | \f | |
2625 | extern void _initialize_varobj (void); | |
2626 | void | |
2627 | _initialize_varobj (void) | |
2628 | { | |
2629 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2630 | ||
2631 | varobj_table = xmalloc (sizeof_table); | |
2632 | memset (varobj_table, 0, sizeof_table); | |
2633 | ||
85c07804 AC |
2634 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2635 | &varobjdebug, _("\ | |
2636 | Set varobj debugging."), _("\ | |
2637 | Show varobj debugging."), _("\ | |
2638 | When non-zero, varobj debugging is enabled."), | |
2639 | NULL, | |
920d2a44 | 2640 | show_varobjdebug, |
85c07804 | 2641 | &setlist, &showlist); |
8b93c638 | 2642 | } |