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" | |
28335dcc | 35 | #include "vec.h" |
8b93c638 JM |
36 | |
37 | /* Non-zero if we want to see trace of varobj level stuff. */ | |
38 | ||
39 | int varobjdebug = 0; | |
920d2a44 AC |
40 | static void |
41 | show_varobjdebug (struct ui_file *file, int from_tty, | |
42 | struct cmd_list_element *c, const char *value) | |
43 | { | |
44 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
45 | } | |
8b93c638 JM |
46 | |
47 | /* String representations of gdb's format codes */ | |
48 | char *varobj_format_string[] = | |
72330bd6 | 49 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
50 | |
51 | /* String representations of gdb's known languages */ | |
72330bd6 | 52 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
53 | |
54 | /* Data structures */ | |
55 | ||
56 | /* Every root variable has one of these structures saved in its | |
57 | varobj. Members which must be free'd are noted. */ | |
58 | struct varobj_root | |
72330bd6 | 59 | { |
8b93c638 | 60 | |
72330bd6 AC |
61 | /* Alloc'd expression for this parent. */ |
62 | struct expression *exp; | |
8b93c638 | 63 | |
72330bd6 AC |
64 | /* Block for which this expression is valid */ |
65 | struct block *valid_block; | |
8b93c638 | 66 | |
72330bd6 | 67 | /* The frame for this expression */ |
e64d9b3d | 68 | struct frame_id frame; |
8b93c638 | 69 | |
72330bd6 AC |
70 | /* If 1, "update" always recomputes the frame & valid block |
71 | using the currently selected frame. */ | |
72 | int use_selected_frame; | |
73a93a32 | 73 | |
72330bd6 AC |
74 | /* Language info for this variable and its children */ |
75 | struct language_specific *lang; | |
8b93c638 | 76 | |
72330bd6 AC |
77 | /* The varobj for this root node. */ |
78 | struct varobj *rootvar; | |
8b93c638 | 79 | |
72330bd6 AC |
80 | /* Next root variable */ |
81 | struct varobj_root *next; | |
82 | }; | |
8b93c638 | 83 | |
28335dcc VP |
84 | typedef struct varobj *varobj_p; |
85 | ||
86 | DEF_VEC_P (varobj_p); | |
87 | ||
8b93c638 JM |
88 | /* Every variable in the system has a structure of this type defined |
89 | for it. This structure holds all information necessary to manipulate | |
90 | a particular object variable. Members which must be freed are noted. */ | |
91 | struct varobj | |
72330bd6 | 92 | { |
8b93c638 | 93 | |
72330bd6 AC |
94 | /* Alloc'd name of the variable for this object.. If this variable is a |
95 | child, then this name will be the child's source name. | |
96 | (bar, not foo.bar) */ | |
97 | /* NOTE: This is the "expression" */ | |
98 | char *name; | |
8b93c638 | 99 | |
72330bd6 AC |
100 | /* The alloc'd name for this variable's object. This is here for |
101 | convenience when constructing this object's children. */ | |
102 | char *obj_name; | |
8b93c638 | 103 | |
72330bd6 AC |
104 | /* Index of this variable in its parent or -1 */ |
105 | int index; | |
8b93c638 | 106 | |
72330bd6 AC |
107 | /* The type of this variable. This may NEVER be NULL. */ |
108 | struct type *type; | |
8b93c638 | 109 | |
acd65feb | 110 | /* The value of this expression or subexpression. This may be NULL. |
b2c2bd75 VP |
111 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
112 | the value is either NULL, or not lazy. */ | |
30b28db1 | 113 | struct value *value; |
8b93c638 | 114 | |
72330bd6 AC |
115 | /* Did an error occur evaluating the expression or getting its value? */ |
116 | int error; | |
8b93c638 | 117 | |
72330bd6 AC |
118 | /* The number of (immediate) children this variable has */ |
119 | int num_children; | |
8b93c638 | 120 | |
72330bd6 AC |
121 | /* If this object is a child, this points to its immediate parent. */ |
122 | struct varobj *parent; | |
8b93c638 | 123 | |
28335dcc VP |
124 | /* Children of this object. */ |
125 | VEC (varobj_p) *children; | |
8b93c638 | 126 | |
72330bd6 AC |
127 | /* Description of the root variable. Points to root variable for children. */ |
128 | struct varobj_root *root; | |
8b93c638 | 129 | |
72330bd6 AC |
130 | /* The format of the output for this object */ |
131 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
132 | |
133 | /* Was this variable updated via a varobj_set_value operation */ | |
134 | int updated; | |
72330bd6 | 135 | }; |
8b93c638 | 136 | |
8b93c638 | 137 | struct cpstack |
72330bd6 AC |
138 | { |
139 | char *name; | |
140 | struct cpstack *next; | |
141 | }; | |
8b93c638 JM |
142 | |
143 | /* A list of varobjs */ | |
144 | ||
145 | struct vlist | |
72330bd6 AC |
146 | { |
147 | struct varobj *var; | |
148 | struct vlist *next; | |
149 | }; | |
8b93c638 JM |
150 | |
151 | /* Private function prototypes */ | |
152 | ||
153 | /* Helper functions for the above subcommands. */ | |
154 | ||
a14ed312 | 155 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 156 | |
a14ed312 KB |
157 | static void delete_variable_1 (struct cpstack **, int *, |
158 | struct varobj *, int, int); | |
8b93c638 | 159 | |
a14ed312 | 160 | static int install_variable (struct varobj *); |
8b93c638 | 161 | |
a14ed312 | 162 | static void uninstall_variable (struct varobj *); |
8b93c638 | 163 | |
a14ed312 | 164 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 165 | |
8b93c638 JM |
166 | /* Utility routines */ |
167 | ||
a14ed312 | 168 | static struct varobj *new_variable (void); |
8b93c638 | 169 | |
a14ed312 | 170 | static struct varobj *new_root_variable (void); |
8b93c638 | 171 | |
a14ed312 | 172 | static void free_variable (struct varobj *var); |
8b93c638 | 173 | |
74b7792f AC |
174 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
175 | ||
a14ed312 | 176 | static struct type *get_type (struct varobj *var); |
8b93c638 | 177 | |
a14ed312 | 178 | static struct type *get_type_deref (struct varobj *var); |
8b93c638 | 179 | |
a14ed312 | 180 | static struct type *get_target_type (struct type *); |
8b93c638 | 181 | |
a14ed312 | 182 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 183 | |
a14ed312 | 184 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 185 | |
a14ed312 | 186 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 187 | |
acd65feb VP |
188 | static int install_new_value (struct varobj *var, struct value *value, |
189 | int initial); | |
190 | ||
8b93c638 JM |
191 | /* Language-specific routines. */ |
192 | ||
a14ed312 | 193 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 194 | |
a14ed312 | 195 | static int number_of_children (struct varobj *); |
8b93c638 | 196 | |
a14ed312 | 197 | static char *name_of_variable (struct varobj *); |
8b93c638 | 198 | |
a14ed312 | 199 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 200 | |
30b28db1 | 201 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 202 | |
30b28db1 | 203 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 204 | |
a14ed312 | 205 | static int variable_editable (struct varobj *var); |
8b93c638 | 206 | |
a14ed312 | 207 | static char *my_value_of_variable (struct varobj *var); |
8b93c638 | 208 | |
b2c2bd75 VP |
209 | static int varobj_value_is_changeable_p (struct varobj *var); |
210 | ||
211 | static int is_root_p (struct varobj *var); | |
8b93c638 JM |
212 | |
213 | /* C implementation */ | |
214 | ||
a14ed312 | 215 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 216 | |
a14ed312 | 217 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 218 | |
a14ed312 | 219 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 220 | |
30b28db1 | 221 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 222 | |
30b28db1 | 223 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 224 | |
a14ed312 | 225 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 226 | |
a14ed312 | 227 | static int c_variable_editable (struct varobj *var); |
8b93c638 | 228 | |
a14ed312 | 229 | static char *c_value_of_variable (struct varobj *var); |
8b93c638 JM |
230 | |
231 | /* C++ implementation */ | |
232 | ||
a14ed312 | 233 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 234 | |
a14ed312 | 235 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 236 | |
a14ed312 | 237 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 238 | |
a14ed312 | 239 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 240 | |
30b28db1 | 241 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 242 | |
30b28db1 | 243 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 244 | |
a14ed312 | 245 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 246 | |
a14ed312 | 247 | static int cplus_variable_editable (struct varobj *var); |
8b93c638 | 248 | |
a14ed312 | 249 | static char *cplus_value_of_variable (struct varobj *var); |
8b93c638 JM |
250 | |
251 | /* Java implementation */ | |
252 | ||
a14ed312 | 253 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 254 | |
a14ed312 | 255 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 256 | |
a14ed312 | 257 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 258 | |
30b28db1 | 259 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 260 | |
30b28db1 | 261 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 262 | |
a14ed312 | 263 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 264 | |
a14ed312 | 265 | static int java_variable_editable (struct varobj *var); |
8b93c638 | 266 | |
a14ed312 | 267 | static char *java_value_of_variable (struct varobj *var); |
8b93c638 JM |
268 | |
269 | /* The language specific vector */ | |
270 | ||
271 | struct language_specific | |
72330bd6 | 272 | { |
8b93c638 | 273 | |
72330bd6 AC |
274 | /* The language of this variable */ |
275 | enum varobj_languages language; | |
8b93c638 | 276 | |
72330bd6 AC |
277 | /* The number of children of PARENT. */ |
278 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 279 | |
72330bd6 AC |
280 | /* The name (expression) of a root varobj. */ |
281 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 282 | |
72330bd6 AC |
283 | /* The name of the INDEX'th child of PARENT. */ |
284 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 285 | |
30b28db1 AC |
286 | /* The ``struct value *'' of the root variable ROOT. */ |
287 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 288 | |
30b28db1 AC |
289 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
290 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 291 | |
72330bd6 AC |
292 | /* The type of the INDEX'th child of PARENT. */ |
293 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 294 | |
72330bd6 AC |
295 | /* Is VAR editable? */ |
296 | int (*variable_editable) (struct varobj * var); | |
8b93c638 | 297 | |
72330bd6 AC |
298 | /* The current value of VAR. */ |
299 | char *(*value_of_variable) (struct varobj * var); | |
300 | }; | |
8b93c638 JM |
301 | |
302 | /* Array of known source language routines. */ | |
d5d6fca5 | 303 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
304 | /* Unknown (try treating as C */ |
305 | { | |
72330bd6 AC |
306 | vlang_unknown, |
307 | c_number_of_children, | |
308 | c_name_of_variable, | |
309 | c_name_of_child, | |
310 | c_value_of_root, | |
311 | c_value_of_child, | |
312 | c_type_of_child, | |
313 | c_variable_editable, | |
314 | c_value_of_variable} | |
8b93c638 JM |
315 | , |
316 | /* C */ | |
317 | { | |
72330bd6 AC |
318 | vlang_c, |
319 | c_number_of_children, | |
320 | c_name_of_variable, | |
321 | c_name_of_child, | |
322 | c_value_of_root, | |
323 | c_value_of_child, | |
324 | c_type_of_child, | |
325 | c_variable_editable, | |
326 | c_value_of_variable} | |
8b93c638 JM |
327 | , |
328 | /* C++ */ | |
329 | { | |
72330bd6 AC |
330 | vlang_cplus, |
331 | cplus_number_of_children, | |
332 | cplus_name_of_variable, | |
333 | cplus_name_of_child, | |
334 | cplus_value_of_root, | |
335 | cplus_value_of_child, | |
336 | cplus_type_of_child, | |
337 | cplus_variable_editable, | |
338 | cplus_value_of_variable} | |
8b93c638 JM |
339 | , |
340 | /* Java */ | |
341 | { | |
72330bd6 AC |
342 | vlang_java, |
343 | java_number_of_children, | |
344 | java_name_of_variable, | |
345 | java_name_of_child, | |
346 | java_value_of_root, | |
347 | java_value_of_child, | |
348 | java_type_of_child, | |
349 | java_variable_editable, | |
350 | java_value_of_variable} | |
8b93c638 JM |
351 | }; |
352 | ||
353 | /* A little convenience enum for dealing with C++/Java */ | |
354 | enum vsections | |
72330bd6 AC |
355 | { |
356 | v_public = 0, v_private, v_protected | |
357 | }; | |
8b93c638 JM |
358 | |
359 | /* Private data */ | |
360 | ||
361 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 362 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
363 | |
364 | /* Header of the list of root variable objects */ | |
365 | static struct varobj_root *rootlist; | |
366 | static int rootcount = 0; /* number of root varobjs in the list */ | |
367 | ||
368 | /* Prime number indicating the number of buckets in the hash table */ | |
369 | /* A prime large enough to avoid too many colisions */ | |
370 | #define VAROBJ_TABLE_SIZE 227 | |
371 | ||
372 | /* Pointer to the varobj hash table (built at run time) */ | |
373 | static struct vlist **varobj_table; | |
374 | ||
8b93c638 JM |
375 | /* Is the variable X one of our "fake" children? */ |
376 | #define CPLUS_FAKE_CHILD(x) \ | |
377 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
378 | \f | |
379 | ||
380 | /* API Implementation */ | |
b2c2bd75 VP |
381 | static int |
382 | is_root_p (struct varobj *var) | |
383 | { | |
384 | return (var->root->rootvar == var); | |
385 | } | |
8b93c638 JM |
386 | |
387 | /* Creates a varobj (not its children) */ | |
388 | ||
7d8547c9 AC |
389 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
390 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
391 | ||
392 | static struct frame_info * | |
393 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
394 | { | |
395 | struct frame_info *frame = NULL; | |
396 | ||
397 | if (frame_addr == (CORE_ADDR) 0) | |
398 | return NULL; | |
399 | ||
400 | while (1) | |
401 | { | |
402 | frame = get_prev_frame (frame); | |
403 | if (frame == NULL) | |
404 | return NULL; | |
eb5492fa | 405 | if (get_frame_base_address (frame) == frame_addr) |
7d8547c9 AC |
406 | return frame; |
407 | } | |
408 | } | |
409 | ||
8b93c638 JM |
410 | struct varobj * |
411 | varobj_create (char *objname, | |
72330bd6 | 412 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
413 | { |
414 | struct varobj *var; | |
2c67cb8b AC |
415 | struct frame_info *fi; |
416 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
417 | struct block *block; |
418 | struct cleanup *old_chain; | |
419 | ||
420 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
421 | var = new_root_variable (); | |
74b7792f | 422 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
423 | |
424 | if (expression != NULL) | |
425 | { | |
426 | char *p; | |
427 | enum varobj_languages lang; | |
acd65feb | 428 | struct value *value; |
8b93c638 JM |
429 | |
430 | /* Parse and evaluate the expression, filling in as much | |
431 | of the variable's data as possible */ | |
432 | ||
433 | /* Allow creator to specify context of variable */ | |
72330bd6 | 434 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
6e7f8b9c | 435 | fi = deprecated_selected_frame; |
8b93c638 | 436 | else |
7d8547c9 AC |
437 | /* FIXME: cagney/2002-11-23: This code should be doing a |
438 | lookup using the frame ID and not just the frame's | |
439 | ``address''. This, of course, means an interface change. | |
440 | However, with out that interface change ISAs, such as the | |
441 | ia64 with its two stacks, won't work. Similar goes for the | |
442 | case where there is a frameless function. */ | |
8b93c638 JM |
443 | fi = find_frame_addr_in_frame_chain (frame); |
444 | ||
73a93a32 JI |
445 | /* frame = -2 means always use selected frame */ |
446 | if (type == USE_SELECTED_FRAME) | |
447 | var->root->use_selected_frame = 1; | |
448 | ||
8b93c638 JM |
449 | block = NULL; |
450 | if (fi != NULL) | |
ae767bfb | 451 | block = get_frame_block (fi, 0); |
8b93c638 JM |
452 | |
453 | p = expression; | |
454 | innermost_block = NULL; | |
73a93a32 JI |
455 | /* Wrap the call to parse expression, so we can |
456 | return a sensible error. */ | |
457 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
458 | { | |
459 | return NULL; | |
460 | } | |
8b93c638 JM |
461 | |
462 | /* Don't allow variables to be created for types. */ | |
463 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
464 | { | |
465 | do_cleanups (old_chain); | |
bc8332bb AC |
466 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
467 | " as an expression.\n"); | |
8b93c638 JM |
468 | return NULL; |
469 | } | |
470 | ||
471 | var->format = variable_default_display (var); | |
472 | var->root->valid_block = innermost_block; | |
473 | var->name = savestring (expression, strlen (expression)); | |
474 | ||
475 | /* When the frame is different from the current frame, | |
476 | we must select the appropriate frame before parsing | |
477 | the expression, otherwise the value will not be current. | |
478 | Since select_frame is so benign, just call it for all cases. */ | |
479 | if (fi != NULL) | |
480 | { | |
7a424e99 | 481 | var->root->frame = get_frame_id (fi); |
6e7f8b9c | 482 | old_fi = deprecated_selected_frame; |
0f7d239c | 483 | select_frame (fi); |
8b93c638 JM |
484 | } |
485 | ||
486 | /* We definitively need to catch errors here. | |
487 | If evaluate_expression succeeds we got the value we wanted. | |
488 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb VP |
489 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
490 | /* Error getting the value. Try to at least get the | |
491 | right type. */ | |
492 | value = evaluate_type (var->root->exp); | |
493 | ||
acd65feb | 494 | var->type = value_type (value); |
acd65feb | 495 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
496 | |
497 | /* Set language info */ | |
498 | lang = variable_language (var); | |
d5d6fca5 | 499 | var->root->lang = &languages[lang]; |
8b93c638 JM |
500 | |
501 | /* Set ourselves as our root */ | |
502 | var->root->rootvar = var; | |
503 | ||
504 | /* Reset the selected frame */ | |
505 | if (fi != NULL) | |
0f7d239c | 506 | select_frame (old_fi); |
8b93c638 JM |
507 | } |
508 | ||
73a93a32 JI |
509 | /* If the variable object name is null, that means this |
510 | is a temporary variable, so don't install it. */ | |
511 | ||
512 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 JM |
513 | { |
514 | var->obj_name = savestring (objname, strlen (objname)); | |
515 | ||
516 | /* If a varobj name is duplicated, the install will fail so | |
517 | we must clenup */ | |
518 | if (!install_variable (var)) | |
519 | { | |
520 | do_cleanups (old_chain); | |
521 | return NULL; | |
522 | } | |
523 | } | |
524 | ||
525 | discard_cleanups (old_chain); | |
526 | return var; | |
527 | } | |
528 | ||
529 | /* Generates an unique name that can be used for a varobj */ | |
530 | ||
531 | char * | |
532 | varobj_gen_name (void) | |
533 | { | |
534 | static int id = 0; | |
e64d9b3d | 535 | char *obj_name; |
8b93c638 JM |
536 | |
537 | /* generate a name for this object */ | |
538 | id++; | |
b435e160 | 539 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 540 | |
e64d9b3d | 541 | return obj_name; |
8b93c638 JM |
542 | } |
543 | ||
544 | /* Given an "objname", returns the pointer to the corresponding varobj | |
545 | or NULL if not found */ | |
546 | ||
547 | struct varobj * | |
548 | varobj_get_handle (char *objname) | |
549 | { | |
550 | struct vlist *cv; | |
551 | const char *chp; | |
552 | unsigned int index = 0; | |
553 | unsigned int i = 1; | |
554 | ||
555 | for (chp = objname; *chp; chp++) | |
556 | { | |
557 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
558 | } | |
559 | ||
560 | cv = *(varobj_table + index); | |
561 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
562 | cv = cv->next; | |
563 | ||
564 | if (cv == NULL) | |
8a3fe4f8 | 565 | error (_("Variable object not found")); |
8b93c638 JM |
566 | |
567 | return cv->var; | |
568 | } | |
569 | ||
570 | /* Given the handle, return the name of the object */ | |
571 | ||
572 | char * | |
573 | varobj_get_objname (struct varobj *var) | |
574 | { | |
575 | return var->obj_name; | |
576 | } | |
577 | ||
578 | /* Given the handle, return the expression represented by the object */ | |
579 | ||
580 | char * | |
581 | varobj_get_expression (struct varobj *var) | |
582 | { | |
583 | return name_of_variable (var); | |
584 | } | |
585 | ||
586 | /* Deletes a varobj and all its children if only_children == 0, | |
587 | otherwise deletes only the children; returns a malloc'ed list of all the | |
588 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
589 | ||
590 | int | |
591 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
592 | { | |
593 | int delcount; | |
594 | int mycount; | |
595 | struct cpstack *result = NULL; | |
596 | char **cp; | |
597 | ||
598 | /* Initialize a stack for temporary results */ | |
599 | cppush (&result, NULL); | |
600 | ||
601 | if (only_children) | |
602 | /* Delete only the variable children */ | |
603 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
604 | else | |
605 | /* Delete the variable and all its children */ | |
606 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
607 | ||
608 | /* We may have been asked to return a list of what has been deleted */ | |
609 | if (dellist != NULL) | |
610 | { | |
611 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
612 | ||
613 | cp = *dellist; | |
614 | mycount = delcount; | |
615 | *cp = cppop (&result); | |
616 | while ((*cp != NULL) && (mycount > 0)) | |
617 | { | |
618 | mycount--; | |
619 | cp++; | |
620 | *cp = cppop (&result); | |
621 | } | |
622 | ||
623 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 624 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 625 | mycount); |
8b93c638 JM |
626 | } |
627 | ||
628 | return delcount; | |
629 | } | |
630 | ||
631 | /* Set/Get variable object display format */ | |
632 | ||
633 | enum varobj_display_formats | |
634 | varobj_set_display_format (struct varobj *var, | |
635 | enum varobj_display_formats format) | |
636 | { | |
637 | switch (format) | |
638 | { | |
639 | case FORMAT_NATURAL: | |
640 | case FORMAT_BINARY: | |
641 | case FORMAT_DECIMAL: | |
642 | case FORMAT_HEXADECIMAL: | |
643 | case FORMAT_OCTAL: | |
644 | var->format = format; | |
645 | break; | |
646 | ||
647 | default: | |
648 | var->format = variable_default_display (var); | |
649 | } | |
650 | ||
651 | return var->format; | |
652 | } | |
653 | ||
654 | enum varobj_display_formats | |
655 | varobj_get_display_format (struct varobj *var) | |
656 | { | |
657 | return var->format; | |
658 | } | |
659 | ||
660 | int | |
661 | varobj_get_num_children (struct varobj *var) | |
662 | { | |
663 | if (var->num_children == -1) | |
664 | var->num_children = number_of_children (var); | |
665 | ||
666 | return var->num_children; | |
667 | } | |
668 | ||
669 | /* Creates a list of the immediate children of a variable object; | |
670 | the return code is the number of such children or -1 on error */ | |
671 | ||
672 | int | |
673 | varobj_list_children (struct varobj *var, struct varobj ***childlist) | |
674 | { | |
675 | struct varobj *child; | |
676 | char *name; | |
677 | int i; | |
678 | ||
679 | /* sanity check: have we been passed a pointer? */ | |
680 | if (childlist == NULL) | |
681 | return -1; | |
682 | ||
683 | *childlist = NULL; | |
684 | ||
685 | if (var->num_children == -1) | |
686 | var->num_children = number_of_children (var); | |
687 | ||
74a44383 DJ |
688 | /* If that failed, give up. */ |
689 | if (var->num_children == -1) | |
690 | return -1; | |
691 | ||
28335dcc VP |
692 | /* If we're called when the list of children is not yet initialized, |
693 | allocate enough elements in it. */ | |
694 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
695 | VEC_safe_push (varobj_p, var->children, NULL); | |
696 | ||
8b93c638 JM |
697 | /* List of children */ |
698 | *childlist = xmalloc ((var->num_children + 1) * sizeof (struct varobj *)); | |
699 | ||
700 | for (i = 0; i < var->num_children; i++) | |
701 | { | |
28335dcc VP |
702 | varobj_p existing; |
703 | ||
8b93c638 JM |
704 | /* Mark as the end in case we bail out */ |
705 | *((*childlist) + i) = NULL; | |
706 | ||
28335dcc VP |
707 | existing = VEC_index (varobj_p, var->children, i); |
708 | ||
709 | if (existing == NULL) | |
710 | { | |
711 | /* Either it's the first call to varobj_list_children for | |
712 | this variable object, and the child was never created, | |
713 | or it was explicitly deleted by the client. */ | |
714 | name = name_of_child (var, i); | |
715 | existing = create_child (var, i, name); | |
716 | VEC_replace (varobj_p, var->children, i, existing); | |
717 | } | |
8b93c638 | 718 | |
28335dcc | 719 | *((*childlist) + i) = existing; |
8b93c638 JM |
720 | } |
721 | ||
722 | /* End of list is marked by a NULL pointer */ | |
723 | *((*childlist) + i) = NULL; | |
724 | ||
725 | return var->num_children; | |
726 | } | |
727 | ||
728 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
729 | prints on the console */ | |
730 | ||
731 | char * | |
732 | varobj_get_type (struct varobj *var) | |
733 | { | |
30b28db1 | 734 | struct value *val; |
8b93c638 JM |
735 | struct cleanup *old_chain; |
736 | struct ui_file *stb; | |
737 | char *thetype; | |
738 | long length; | |
739 | ||
740 | /* For the "fake" variables, do not return a type. (It's type is | |
741 | NULL, too.) */ | |
742 | if (CPLUS_FAKE_CHILD (var)) | |
743 | return NULL; | |
744 | ||
745 | stb = mem_fileopen (); | |
746 | old_chain = make_cleanup_ui_file_delete (stb); | |
747 | ||
30b28db1 | 748 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
749 | cast it to our type. We then typeprint this variable. */ |
750 | val = value_zero (var->type, not_lval); | |
df407dfe | 751 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
752 | |
753 | thetype = ui_file_xstrdup (stb, &length); | |
754 | do_cleanups (old_chain); | |
755 | return thetype; | |
756 | } | |
757 | ||
1ecb4ee0 DJ |
758 | /* Obtain the type of an object variable. */ |
759 | ||
760 | struct type * | |
761 | varobj_get_gdb_type (struct varobj *var) | |
762 | { | |
763 | return var->type; | |
764 | } | |
765 | ||
8b93c638 JM |
766 | enum varobj_languages |
767 | varobj_get_language (struct varobj *var) | |
768 | { | |
769 | return variable_language (var); | |
770 | } | |
771 | ||
772 | int | |
773 | varobj_get_attributes (struct varobj *var) | |
774 | { | |
775 | int attributes = 0; | |
776 | ||
777 | if (variable_editable (var)) | |
778 | /* FIXME: define masks for attributes */ | |
779 | attributes |= 0x00000001; /* Editable */ | |
780 | ||
781 | return attributes; | |
782 | } | |
783 | ||
784 | char * | |
785 | varobj_get_value (struct varobj *var) | |
786 | { | |
787 | return my_value_of_variable (var); | |
788 | } | |
789 | ||
790 | /* Set the value of an object variable (if it is editable) to the | |
791 | value of the given expression */ | |
792 | /* Note: Invokes functions that can call error() */ | |
793 | ||
794 | int | |
795 | varobj_set_value (struct varobj *var, char *expression) | |
796 | { | |
30b28db1 | 797 | struct value *val; |
8b93c638 | 798 | int offset = 0; |
a6c442d8 | 799 | int error = 0; |
8b93c638 JM |
800 | |
801 | /* The argument "expression" contains the variable's new value. | |
802 | We need to first construct a legal expression for this -- ugh! */ | |
803 | /* Does this cover all the bases? */ | |
804 | struct expression *exp; | |
30b28db1 | 805 | struct value *value; |
8b93c638 JM |
806 | int saved_input_radix = input_radix; |
807 | ||
575bbeb6 | 808 | if (var->value != NULL && variable_editable (var) && !var->error) |
8b93c638 JM |
809 | { |
810 | char *s = expression; | |
811 | int i; | |
8b93c638 JM |
812 | |
813 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ | |
7a24eb7c | 814 | exp = parse_exp_1 (&s, 0, 0); |
8b93c638 JM |
815 | if (!gdb_evaluate_expression (exp, &value)) |
816 | { | |
817 | /* We cannot proceed without a valid expression. */ | |
8038e1e2 | 818 | xfree (exp); |
8b93c638 JM |
819 | return 0; |
820 | } | |
821 | ||
acd65feb | 822 | /* All types that are editable must also be changeable. */ |
b2c2bd75 | 823 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb VP |
824 | |
825 | /* The value of a changeable variable object must not be lazy. */ | |
826 | gdb_assert (!value_lazy (var->value)); | |
827 | ||
828 | /* Need to coerce the input. We want to check if the | |
829 | value of the variable object will be different | |
830 | after assignment, and the first thing value_assign | |
831 | does is coerce the input. | |
832 | For example, if we are assigning an array to a pointer variable we | |
833 | should compare the pointer with the the array's address, not with the | |
834 | array's content. */ | |
835 | value = coerce_array (value); | |
836 | ||
acd65feb VP |
837 | /* The new value may be lazy. gdb_value_assign, or |
838 | rather value_contents, will take care of this. | |
839 | If fetching of the new value will fail, gdb_value_assign | |
840 | with catch the exception. */ | |
575bbeb6 | 841 | if (!gdb_value_assign (var->value, value, &val)) |
8a1a0112 | 842 | return 0; |
b26ed50d | 843 | |
ae097835 VP |
844 | /* If the value has changed, record it, so that next -var-update can |
845 | report this change. If a variable had a value of '1', we've set it | |
846 | to '333' and then set again to '1', when -var-update will report this | |
847 | variable as changed -- because the first assignment has set the | |
848 | 'updated' flag. There's no need to optimize that, because return value | |
849 | of -var-update should be considered an approximation. */ | |
850 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
8b93c638 JM |
851 | input_radix = saved_input_radix; |
852 | return 1; | |
853 | } | |
854 | ||
855 | return 0; | |
856 | } | |
857 | ||
858 | /* Returns a malloc'ed list with all root variable objects */ | |
859 | int | |
860 | varobj_list (struct varobj ***varlist) | |
861 | { | |
862 | struct varobj **cv; | |
863 | struct varobj_root *croot; | |
864 | int mycount = rootcount; | |
865 | ||
866 | /* Alloc (rootcount + 1) entries for the result */ | |
867 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
868 | ||
869 | cv = *varlist; | |
870 | croot = rootlist; | |
871 | while ((croot != NULL) && (mycount > 0)) | |
872 | { | |
873 | *cv = croot->rootvar; | |
874 | mycount--; | |
875 | cv++; | |
876 | croot = croot->next; | |
877 | } | |
878 | /* Mark the end of the list */ | |
879 | *cv = NULL; | |
880 | ||
881 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
882 | warning |
883 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
884 | rootcount, mycount); | |
8b93c638 JM |
885 | |
886 | return rootcount; | |
887 | } | |
888 | ||
acd65feb VP |
889 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
890 | this is the first assignement after the variable object was just | |
891 | created, or changed type. In that case, just assign the value | |
892 | and return 0. | |
893 | Otherwise, assign the value and if type_changeable returns non-zero, | |
894 | find if the new value is different from the current value. | |
b26ed50d VP |
895 | Return 1 if so, and 0 if the values are equal. |
896 | ||
897 | The VALUE parameter should not be released -- the function will | |
898 | take care of releasing it when needed. */ | |
acd65feb VP |
899 | static int |
900 | install_new_value (struct varobj *var, struct value *value, int initial) | |
901 | { | |
902 | int changeable; | |
903 | int need_to_fetch; | |
904 | int changed = 0; | |
905 | ||
906 | var->error = 0; | |
907 | /* We need to know the varobj's type to decide if the value should | |
908 | be fetched or not. C++ fake children (public/protected/private) don't have | |
909 | a type. */ | |
910 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 911 | changeable = varobj_value_is_changeable_p (var); |
acd65feb VP |
912 | need_to_fetch = changeable; |
913 | ||
b26ed50d VP |
914 | /* We are not interested in the address of references, and given |
915 | that in C++ a reference is not rebindable, it cannot | |
916 | meaningfully change. So, get hold of the real value. */ | |
917 | if (value) | |
918 | { | |
919 | value = coerce_ref (value); | |
920 | release_value (value); | |
921 | } | |
922 | ||
acd65feb VP |
923 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
924 | /* For unions, we need to fetch the value implicitly because | |
925 | of implementation of union member fetch. When gdb | |
926 | creates a value for a field and the value of the enclosing | |
927 | structure is not lazy, it immediately copies the necessary | |
928 | bytes from the enclosing values. If the enclosing value is | |
929 | lazy, the call to value_fetch_lazy on the field will read | |
930 | the data from memory. For unions, that means we'll read the | |
931 | same memory more than once, which is not desirable. So | |
932 | fetch now. */ | |
933 | need_to_fetch = 1; | |
934 | ||
935 | /* The new value might be lazy. If the type is changeable, | |
936 | that is we'll be comparing values of this type, fetch the | |
937 | value now. Otherwise, on the next update the old value | |
938 | will be lazy, which means we've lost that old value. */ | |
939 | if (need_to_fetch && value && value_lazy (value)) | |
940 | { | |
941 | if (!gdb_value_fetch_lazy (value)) | |
942 | { | |
943 | var->error = 1; | |
944 | /* Set the value to NULL, so that for the next -var-update, | |
945 | we don't try to compare the new value with this value, | |
946 | that we couldn't even read. */ | |
947 | value = NULL; | |
948 | } | |
949 | else | |
950 | var->error = 0; | |
951 | } | |
952 | ||
953 | /* If the type is changeable, compare the old and the new values. | |
954 | If this is the initial assignment, we don't have any old value | |
955 | to compare with. */ | |
956 | if (!initial && changeable) | |
957 | { | |
958 | /* If the value of the varobj was changed by -var-set-value, then the | |
959 | value in the varobj and in the target is the same. However, that value | |
960 | is different from the value that the varobj had after the previous | |
961 | -var-update. So need to the varobj as changed. */ | |
962 | if (var->updated) | |
963 | changed = 1; | |
964 | else | |
965 | { | |
966 | /* Try to compare the values. That requires that both | |
967 | values are non-lazy. */ | |
968 | ||
969 | /* Quick comparison of NULL values. */ | |
970 | if (var->value == NULL && value == NULL) | |
971 | /* Equal. */ | |
972 | ; | |
973 | else if (var->value == NULL || value == NULL) | |
974 | changed = 1; | |
975 | else | |
976 | { | |
977 | gdb_assert (!value_lazy (var->value)); | |
978 | gdb_assert (!value_lazy (value)); | |
979 | ||
980 | if (!value_contents_equal (var->value, value)) | |
981 | changed = 1; | |
982 | } | |
983 | } | |
984 | } | |
985 | ||
986 | /* We must always keep the new value, since children depend on it. */ | |
987 | if (var->value != NULL) | |
988 | value_free (var->value); | |
989 | var->value = value; | |
990 | var->updated = 0; | |
b26ed50d VP |
991 | |
992 | gdb_assert (!var->value || value_type (var->value)); | |
acd65feb VP |
993 | |
994 | return changed; | |
995 | } | |
996 | ||
997 | ||
8b93c638 JM |
998 | /* Update the values for a variable and its children. This is a |
999 | two-pronged attack. First, re-parse the value for the root's | |
1000 | expression to see if it's changed. Then go all the way | |
1001 | through its children, reconstructing them and noting if they've | |
1002 | changed. | |
73a93a32 JI |
1003 | Return value: |
1004 | -1 if there was an error updating the varobj | |
1005 | -2 if the type changed | |
1006 | Otherwise it is the number of children + parent changed | |
8b93c638 | 1007 | |
705da579 KS |
1008 | Only root variables can be updated... |
1009 | ||
1010 | NOTE: This function may delete the caller's varobj. If it | |
1011 | returns -2, then it has done this and VARP will be modified | |
1012 | to point to the new varobj. */ | |
8b93c638 JM |
1013 | |
1014 | int | |
705da579 | 1015 | varobj_update (struct varobj **varp, struct varobj ***changelist) |
8b93c638 JM |
1016 | { |
1017 | int changed = 0; | |
a6c442d8 | 1018 | int error = 0; |
73a93a32 | 1019 | int type_changed; |
8b93c638 JM |
1020 | int i; |
1021 | int vleft; | |
8b93c638 JM |
1022 | struct varobj *v; |
1023 | struct varobj **cv; | |
2c67cb8b | 1024 | struct varobj **templist = NULL; |
30b28db1 | 1025 | struct value *new; |
28335dcc VP |
1026 | VEC (varobj_p) *stack = NULL; |
1027 | VEC (varobj_p) *result = NULL; | |
e64d9b3d MH |
1028 | struct frame_id old_fid; |
1029 | struct frame_info *fi; | |
8b93c638 JM |
1030 | |
1031 | /* sanity check: have we been passed a pointer? */ | |
1032 | if (changelist == NULL) | |
1033 | return -1; | |
1034 | ||
1035 | /* Only root variables can be updated... */ | |
b2c2bd75 | 1036 | if (!is_root_p (*varp)) |
8b93c638 JM |
1037 | /* Not a root var */ |
1038 | return -1; | |
1039 | ||
1040 | /* Save the selected stack frame, since we will need to change it | |
1041 | in order to evaluate expressions. */ | |
7a424e99 | 1042 | old_fid = get_frame_id (deprecated_selected_frame); |
8b93c638 JM |
1043 | |
1044 | /* Update the root variable. value_of_root can return NULL | |
1045 | if the variable is no longer around, i.e. we stepped out of | |
73a93a32 JI |
1046 | the frame in which a local existed. We are letting the |
1047 | value_of_root variable dispose of the varobj if the type | |
1048 | has changed. */ | |
1049 | type_changed = 1; | |
705da579 | 1050 | new = value_of_root (varp, &type_changed); |
0d2bd018 NR |
1051 | |
1052 | /* Restore selected frame */ | |
1053 | fi = frame_find_by_id (old_fid); | |
1054 | if (fi) | |
1055 | select_frame (fi); | |
1056 | ||
8b93c638 | 1057 | if (new == NULL) |
73a93a32 | 1058 | { |
705da579 | 1059 | (*varp)->error = 1; |
73a93a32 JI |
1060 | return -1; |
1061 | } | |
8b93c638 | 1062 | |
ae093f96 FN |
1063 | /* If this is a "use_selected_frame" varobj, and its type has changed, |
1064 | them note that it's changed. */ | |
1065 | if (type_changed) | |
28335dcc | 1066 | VEC_safe_push (varobj_p, result, *varp); |
acd65feb VP |
1067 | |
1068 | if (install_new_value ((*varp), new, type_changed)) | |
ae093f96 | 1069 | { |
acd65feb VP |
1070 | /* If type_changed is 1, install_new_value will never return |
1071 | non-zero, so we'll never report the same variable twice. */ | |
1072 | gdb_assert (!type_changed); | |
28335dcc | 1073 | VEC_safe_push (varobj_p, result, *varp); |
8b93c638 | 1074 | } |
8b93c638 | 1075 | |
28335dcc | 1076 | VEC_safe_push (varobj_p, stack, *varp); |
8b93c638 JM |
1077 | |
1078 | /* Walk through the children, reconstructing them all. */ | |
28335dcc | 1079 | while (!VEC_empty (varobj_p, stack)) |
8b93c638 | 1080 | { |
28335dcc VP |
1081 | v = VEC_pop (varobj_p, stack); |
1082 | ||
1083 | /* Push any children. Use reverse order so that the first | |
1084 | child is popped from the work stack first, and so | |
1085 | will be added to result first. This does not | |
1086 | affect correctness, just "nicer". */ | |
1087 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1088 | { |
28335dcc VP |
1089 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1090 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
1091 | if (c != NULL) | |
1092 | VEC_safe_push (varobj_p, stack, c); | |
8b93c638 JM |
1093 | } |
1094 | ||
28335dcc VP |
1095 | /* Update this variable, unless it's a root, which is already |
1096 | updated. */ | |
1097 | if (v != *varp) | |
1098 | { | |
1099 | new = value_of_child (v->parent, v->index); | |
1100 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1101 | { | |
1102 | /* Note that it's changed */ | |
1103 | VEC_safe_push (varobj_p, result, v); | |
1104 | v->updated = 0; | |
1105 | } | |
8b93c638 | 1106 | } |
8b93c638 JM |
1107 | } |
1108 | ||
1109 | /* Alloc (changed + 1) list entries */ | |
28335dcc | 1110 | changed = VEC_length (varobj_p, result); |
8b93c638 | 1111 | *changelist = xmalloc ((changed + 1) * sizeof (struct varobj *)); |
28335dcc | 1112 | cv = *changelist; |
8b93c638 | 1113 | |
28335dcc | 1114 | for (i = 0; i < changed; ++i) |
8b93c638 | 1115 | { |
28335dcc VP |
1116 | *cv = VEC_index (varobj_p, result, i); |
1117 | gdb_assert (*cv != NULL); | |
1118 | ++cv; | |
8b93c638 | 1119 | } |
28335dcc | 1120 | *cv = 0; |
8b93c638 | 1121 | |
73a93a32 JI |
1122 | if (type_changed) |
1123 | return -2; | |
1124 | else | |
1125 | return changed; | |
8b93c638 JM |
1126 | } |
1127 | \f | |
1128 | ||
1129 | /* Helper functions */ | |
1130 | ||
1131 | /* | |
1132 | * Variable object construction/destruction | |
1133 | */ | |
1134 | ||
1135 | static int | |
fba45db2 KB |
1136 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1137 | int only_children_p) | |
8b93c638 JM |
1138 | { |
1139 | int delcount = 0; | |
1140 | ||
1141 | delete_variable_1 (resultp, &delcount, var, | |
1142 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1143 | ||
1144 | return delcount; | |
1145 | } | |
1146 | ||
1147 | /* Delete the variable object VAR and its children */ | |
1148 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1149 | and the parent is not removed we dump core. It must be always | |
1150 | initially called with remove_from_parent_p set */ | |
1151 | static void | |
72330bd6 AC |
1152 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1153 | struct varobj *var, int only_children_p, | |
1154 | int remove_from_parent_p) | |
8b93c638 | 1155 | { |
28335dcc | 1156 | int i; |
8b93c638 JM |
1157 | |
1158 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1159 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1160 | { | |
1161 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
8b93c638 | 1162 | if (!remove_from_parent_p) |
28335dcc VP |
1163 | child->parent = NULL; |
1164 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1165 | } |
28335dcc | 1166 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1167 | |
1168 | /* if we were called to delete only the children we are done here */ | |
1169 | if (only_children_p) | |
1170 | return; | |
1171 | ||
1172 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1173 | /* If the name is null, this is a temporary variable, that has not |
1174 | yet been installed, don't report it, it belongs to the caller... */ | |
1175 | if (var->obj_name != NULL) | |
8b93c638 | 1176 | { |
5b616ba1 | 1177 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1178 | *delcountp = *delcountp + 1; |
1179 | } | |
1180 | ||
1181 | /* If this variable has a parent, remove it from its parent's list */ | |
1182 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1183 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1184 | expensive list search to find the element to remove when we are | |
1185 | discarding the list afterwards */ | |
72330bd6 | 1186 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1187 | { |
28335dcc | 1188 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1189 | } |
72330bd6 | 1190 | |
73a93a32 JI |
1191 | if (var->obj_name != NULL) |
1192 | uninstall_variable (var); | |
8b93c638 JM |
1193 | |
1194 | /* Free memory associated with this variable */ | |
1195 | free_variable (var); | |
1196 | } | |
1197 | ||
1198 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1199 | static int | |
fba45db2 | 1200 | install_variable (struct varobj *var) |
8b93c638 JM |
1201 | { |
1202 | struct vlist *cv; | |
1203 | struct vlist *newvl; | |
1204 | const char *chp; | |
1205 | unsigned int index = 0; | |
1206 | unsigned int i = 1; | |
1207 | ||
1208 | for (chp = var->obj_name; *chp; chp++) | |
1209 | { | |
1210 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1211 | } | |
1212 | ||
1213 | cv = *(varobj_table + index); | |
1214 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1215 | cv = cv->next; | |
1216 | ||
1217 | if (cv != NULL) | |
8a3fe4f8 | 1218 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1219 | |
1220 | /* Add varobj to hash table */ | |
1221 | newvl = xmalloc (sizeof (struct vlist)); | |
1222 | newvl->next = *(varobj_table + index); | |
1223 | newvl->var = var; | |
1224 | *(varobj_table + index) = newvl; | |
1225 | ||
1226 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1227 | if (is_root_p (var)) |
8b93c638 JM |
1228 | { |
1229 | /* Add to list of root variables */ | |
1230 | if (rootlist == NULL) | |
1231 | var->root->next = NULL; | |
1232 | else | |
1233 | var->root->next = rootlist; | |
1234 | rootlist = var->root; | |
1235 | rootcount++; | |
1236 | } | |
1237 | ||
1238 | return 1; /* OK */ | |
1239 | } | |
1240 | ||
1241 | /* Unistall the object VAR. */ | |
1242 | static void | |
fba45db2 | 1243 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1244 | { |
1245 | struct vlist *cv; | |
1246 | struct vlist *prev; | |
1247 | struct varobj_root *cr; | |
1248 | struct varobj_root *prer; | |
1249 | const char *chp; | |
1250 | unsigned int index = 0; | |
1251 | unsigned int i = 1; | |
1252 | ||
1253 | /* Remove varobj from hash table */ | |
1254 | for (chp = var->obj_name; *chp; chp++) | |
1255 | { | |
1256 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1257 | } | |
1258 | ||
1259 | cv = *(varobj_table + index); | |
1260 | prev = NULL; | |
1261 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1262 | { | |
1263 | prev = cv; | |
1264 | cv = cv->next; | |
1265 | } | |
1266 | ||
1267 | if (varobjdebug) | |
1268 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1269 | ||
1270 | if (cv == NULL) | |
1271 | { | |
72330bd6 AC |
1272 | warning |
1273 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1274 | var->obj_name); | |
8b93c638 JM |
1275 | return; |
1276 | } | |
1277 | ||
1278 | if (prev == NULL) | |
1279 | *(varobj_table + index) = cv->next; | |
1280 | else | |
1281 | prev->next = cv->next; | |
1282 | ||
b8c9b27d | 1283 | xfree (cv); |
8b93c638 JM |
1284 | |
1285 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1286 | if (is_root_p (var)) |
8b93c638 JM |
1287 | { |
1288 | /* Remove from list of root variables */ | |
1289 | if (rootlist == var->root) | |
1290 | rootlist = var->root->next; | |
1291 | else | |
1292 | { | |
1293 | prer = NULL; | |
1294 | cr = rootlist; | |
1295 | while ((cr != NULL) && (cr->rootvar != var)) | |
1296 | { | |
1297 | prer = cr; | |
1298 | cr = cr->next; | |
1299 | } | |
1300 | if (cr == NULL) | |
1301 | { | |
72330bd6 AC |
1302 | warning |
1303 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1304 | var->obj_name); | |
8b93c638 JM |
1305 | return; |
1306 | } | |
1307 | if (prer == NULL) | |
1308 | rootlist = NULL; | |
1309 | else | |
1310 | prer->next = cr->next; | |
1311 | } | |
1312 | rootcount--; | |
1313 | } | |
1314 | ||
1315 | } | |
1316 | ||
8b93c638 JM |
1317 | /* Create and install a child of the parent of the given name */ |
1318 | static struct varobj * | |
fba45db2 | 1319 | create_child (struct varobj *parent, int index, char *name) |
8b93c638 JM |
1320 | { |
1321 | struct varobj *child; | |
1322 | char *childs_name; | |
acd65feb | 1323 | struct value *value; |
8b93c638 JM |
1324 | |
1325 | child = new_variable (); | |
1326 | ||
1327 | /* name is allocated by name_of_child */ | |
1328 | child->name = name; | |
1329 | child->index = index; | |
acd65feb | 1330 | value = value_of_child (parent, index); |
8b93c638 JM |
1331 | child->parent = parent; |
1332 | child->root = parent->root; | |
b435e160 | 1333 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1334 | child->obj_name = childs_name; |
1335 | install_variable (child); | |
1336 | ||
acd65feb VP |
1337 | /* Compute the type of the child. Must do this before |
1338 | calling install_new_value. */ | |
1339 | if (value != NULL) | |
1340 | /* If the child had no evaluation errors, var->value | |
1341 | will be non-NULL and contain a valid type. */ | |
1342 | child->type = value_type (value); | |
1343 | else | |
1344 | /* Otherwise, we must compute the type. */ | |
1345 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1346 | child->index); | |
1347 | install_new_value (child, value, 1); | |
1348 | ||
1349 | if ((!CPLUS_FAKE_CHILD (child) && child->value == NULL) || parent->error) | |
1350 | child->error = 1; | |
8b93c638 JM |
1351 | |
1352 | return child; | |
1353 | } | |
8b93c638 JM |
1354 | \f |
1355 | ||
1356 | /* | |
1357 | * Miscellaneous utility functions. | |
1358 | */ | |
1359 | ||
1360 | /* Allocate memory and initialize a new variable */ | |
1361 | static struct varobj * | |
1362 | new_variable (void) | |
1363 | { | |
1364 | struct varobj *var; | |
1365 | ||
1366 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1367 | var->name = NULL; | |
1368 | var->obj_name = NULL; | |
1369 | var->index = -1; | |
1370 | var->type = NULL; | |
1371 | var->value = NULL; | |
1372 | var->error = 0; | |
1373 | var->num_children = -1; | |
1374 | var->parent = NULL; | |
1375 | var->children = NULL; | |
1376 | var->format = 0; | |
1377 | var->root = NULL; | |
fb9b6b35 | 1378 | var->updated = 0; |
8b93c638 JM |
1379 | |
1380 | return var; | |
1381 | } | |
1382 | ||
1383 | /* Allocate memory and initialize a new root variable */ | |
1384 | static struct varobj * | |
1385 | new_root_variable (void) | |
1386 | { | |
1387 | struct varobj *var = new_variable (); | |
1388 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1389 | var->root->lang = NULL; | |
1390 | var->root->exp = NULL; | |
1391 | var->root->valid_block = NULL; | |
7a424e99 | 1392 | var->root->frame = null_frame_id; |
73a93a32 | 1393 | var->root->use_selected_frame = 0; |
8b93c638 JM |
1394 | var->root->rootvar = NULL; |
1395 | ||
1396 | return var; | |
1397 | } | |
1398 | ||
1399 | /* Free any allocated memory associated with VAR. */ | |
1400 | static void | |
fba45db2 | 1401 | free_variable (struct varobj *var) |
8b93c638 JM |
1402 | { |
1403 | /* Free the expression if this is a root variable. */ | |
b2c2bd75 | 1404 | if (is_root_p (var)) |
8b93c638 | 1405 | { |
96c1eda2 | 1406 | free_current_contents (&var->root->exp); |
8038e1e2 | 1407 | xfree (var->root); |
8b93c638 JM |
1408 | } |
1409 | ||
8038e1e2 AC |
1410 | xfree (var->name); |
1411 | xfree (var->obj_name); | |
1412 | xfree (var); | |
8b93c638 JM |
1413 | } |
1414 | ||
74b7792f AC |
1415 | static void |
1416 | do_free_variable_cleanup (void *var) | |
1417 | { | |
1418 | free_variable (var); | |
1419 | } | |
1420 | ||
1421 | static struct cleanup * | |
1422 | make_cleanup_free_variable (struct varobj *var) | |
1423 | { | |
1424 | return make_cleanup (do_free_variable_cleanup, var); | |
1425 | } | |
1426 | ||
6766a268 DJ |
1427 | /* This returns the type of the variable. It also skips past typedefs |
1428 | to return the real type of the variable. | |
94b66fa7 KS |
1429 | |
1430 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1431 | except within get_target_type and get_type. */ | |
8b93c638 | 1432 | static struct type * |
fba45db2 | 1433 | get_type (struct varobj *var) |
8b93c638 JM |
1434 | { |
1435 | struct type *type; | |
1436 | type = var->type; | |
1437 | ||
6766a268 DJ |
1438 | if (type != NULL) |
1439 | type = check_typedef (type); | |
8b93c638 JM |
1440 | |
1441 | return type; | |
1442 | } | |
1443 | ||
0f0ac1f5 NR |
1444 | /* This returns the type of the variable, dereferencing references, pointers |
1445 | and references to pointers, too. */ | |
8b93c638 | 1446 | static struct type * |
fba45db2 | 1447 | get_type_deref (struct varobj *var) |
8b93c638 JM |
1448 | { |
1449 | struct type *type; | |
1450 | ||
1451 | type = get_type (var); | |
1452 | ||
0f0ac1f5 NR |
1453 | if (type) |
1454 | { | |
1455 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1456 | type = get_target_type (type); | |
1457 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
1458 | type = get_target_type (type); | |
1459 | } | |
8b93c638 JM |
1460 | |
1461 | return type; | |
1462 | } | |
1463 | ||
1464 | /* This returns the target type (or NULL) of TYPE, also skipping | |
94b66fa7 KS |
1465 | past typedefs, just like get_type (). |
1466 | ||
1467 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1468 | except within get_target_type and get_type. */ | |
8b93c638 | 1469 | static struct type * |
fba45db2 | 1470 | get_target_type (struct type *type) |
8b93c638 JM |
1471 | { |
1472 | if (type != NULL) | |
1473 | { | |
1474 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1475 | if (type != NULL) |
1476 | type = check_typedef (type); | |
8b93c638 JM |
1477 | } |
1478 | ||
1479 | return type; | |
1480 | } | |
1481 | ||
1482 | /* What is the default display for this variable? We assume that | |
1483 | everything is "natural". Any exceptions? */ | |
1484 | static enum varobj_display_formats | |
fba45db2 | 1485 | variable_default_display (struct varobj *var) |
8b93c638 JM |
1486 | { |
1487 | return FORMAT_NATURAL; | |
1488 | } | |
1489 | ||
8b93c638 JM |
1490 | /* FIXME: The following should be generic for any pointer */ |
1491 | static void | |
fba45db2 | 1492 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
1493 | { |
1494 | struct cpstack *s; | |
1495 | ||
1496 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1497 | s->name = name; | |
1498 | s->next = *pstack; | |
1499 | *pstack = s; | |
1500 | } | |
1501 | ||
1502 | /* FIXME: The following should be generic for any pointer */ | |
1503 | static char * | |
fba45db2 | 1504 | cppop (struct cpstack **pstack) |
8b93c638 JM |
1505 | { |
1506 | struct cpstack *s; | |
1507 | char *v; | |
1508 | ||
1509 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1510 | return NULL; | |
1511 | ||
1512 | s = *pstack; | |
1513 | v = s->name; | |
1514 | *pstack = (*pstack)->next; | |
b8c9b27d | 1515 | xfree (s); |
8b93c638 JM |
1516 | |
1517 | return v; | |
1518 | } | |
1519 | \f | |
1520 | /* | |
1521 | * Language-dependencies | |
1522 | */ | |
1523 | ||
1524 | /* Common entry points */ | |
1525 | ||
1526 | /* Get the language of variable VAR. */ | |
1527 | static enum varobj_languages | |
fba45db2 | 1528 | variable_language (struct varobj *var) |
8b93c638 JM |
1529 | { |
1530 | enum varobj_languages lang; | |
1531 | ||
1532 | switch (var->root->exp->language_defn->la_language) | |
1533 | { | |
1534 | default: | |
1535 | case language_c: | |
1536 | lang = vlang_c; | |
1537 | break; | |
1538 | case language_cplus: | |
1539 | lang = vlang_cplus; | |
1540 | break; | |
1541 | case language_java: | |
1542 | lang = vlang_java; | |
1543 | break; | |
1544 | } | |
1545 | ||
1546 | return lang; | |
1547 | } | |
1548 | ||
1549 | /* Return the number of children for a given variable. | |
1550 | The result of this function is defined by the language | |
1551 | implementation. The number of children returned by this function | |
1552 | is the number of children that the user will see in the variable | |
1553 | display. */ | |
1554 | static int | |
fba45db2 | 1555 | number_of_children (struct varobj *var) |
8b93c638 JM |
1556 | { |
1557 | return (*var->root->lang->number_of_children) (var);; | |
1558 | } | |
1559 | ||
1560 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1561 | static char * | |
fba45db2 | 1562 | name_of_variable (struct varobj *var) |
8b93c638 JM |
1563 | { |
1564 | return (*var->root->lang->name_of_variable) (var); | |
1565 | } | |
1566 | ||
1567 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1568 | static char * | |
fba45db2 | 1569 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
1570 | { |
1571 | return (*var->root->lang->name_of_child) (var, index); | |
1572 | } | |
1573 | ||
30b28db1 | 1574 | /* What is the ``struct value *'' of the root variable VAR? |
73a93a32 JI |
1575 | TYPE_CHANGED controls what to do if the type of a |
1576 | use_selected_frame = 1 variable changes. On input, | |
1577 | TYPE_CHANGED = 1 means discard the old varobj, and replace | |
1578 | it with this one. TYPE_CHANGED = 0 means leave it around. | |
1579 | NB: In both cases, var_handle will point to the new varobj, | |
1580 | so if you use TYPE_CHANGED = 0, you will have to stash the | |
1581 | old varobj pointer away somewhere before calling this. | |
1582 | On return, TYPE_CHANGED will be 1 if the type has changed, and | |
1583 | 0 otherwise. */ | |
30b28db1 | 1584 | static struct value * |
fba45db2 | 1585 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 1586 | { |
73a93a32 JI |
1587 | struct varobj *var; |
1588 | ||
1589 | if (var_handle == NULL) | |
1590 | return NULL; | |
1591 | ||
1592 | var = *var_handle; | |
1593 | ||
1594 | /* This should really be an exception, since this should | |
1595 | only get called with a root variable. */ | |
1596 | ||
b2c2bd75 | 1597 | if (!is_root_p (var)) |
73a93a32 JI |
1598 | return NULL; |
1599 | ||
1600 | if (var->root->use_selected_frame) | |
1601 | { | |
1602 | struct varobj *tmp_var; | |
1603 | char *old_type, *new_type; | |
1604 | old_type = varobj_get_type (var); | |
1605 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
1606 | USE_SELECTED_FRAME); | |
1607 | if (tmp_var == NULL) | |
1608 | { | |
1609 | return NULL; | |
1610 | } | |
1611 | new_type = varobj_get_type (tmp_var); | |
72330bd6 | 1612 | if (strcmp (old_type, new_type) == 0) |
73a93a32 JI |
1613 | { |
1614 | varobj_delete (tmp_var, NULL, 0); | |
1615 | *type_changed = 0; | |
1616 | } | |
1617 | else | |
1618 | { | |
1619 | if (*type_changed) | |
1620 | { | |
72330bd6 | 1621 | tmp_var->obj_name = |
73a93a32 | 1622 | savestring (var->obj_name, strlen (var->obj_name)); |
f7635dd9 | 1623 | varobj_delete (var, NULL, 0); |
73a93a32 JI |
1624 | } |
1625 | else | |
1626 | { | |
72330bd6 | 1627 | tmp_var->obj_name = varobj_gen_name (); |
73a93a32 JI |
1628 | } |
1629 | install_variable (tmp_var); | |
1630 | *var_handle = tmp_var; | |
705da579 | 1631 | var = *var_handle; |
73a93a32 JI |
1632 | *type_changed = 1; |
1633 | } | |
1634 | } | |
1635 | else | |
1636 | { | |
1637 | *type_changed = 0; | |
1638 | } | |
1639 | ||
1640 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1641 | } |
1642 | ||
30b28db1 AC |
1643 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
1644 | static struct value * | |
fba45db2 | 1645 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 1646 | { |
30b28db1 | 1647 | struct value *value; |
8b93c638 JM |
1648 | |
1649 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1650 | ||
8b93c638 JM |
1651 | return value; |
1652 | } | |
1653 | ||
8b93c638 JM |
1654 | /* Is this variable editable? Use the variable's type to make |
1655 | this determination. */ | |
1656 | static int | |
fba45db2 | 1657 | variable_editable (struct varobj *var) |
8b93c638 JM |
1658 | { |
1659 | return (*var->root->lang->variable_editable) (var); | |
1660 | } | |
1661 | ||
1662 | /* GDB already has a command called "value_of_variable". Sigh. */ | |
1663 | static char * | |
fba45db2 | 1664 | my_value_of_variable (struct varobj *var) |
8b93c638 JM |
1665 | { |
1666 | return (*var->root->lang->value_of_variable) (var); | |
1667 | } | |
1668 | ||
acd65feb VP |
1669 | /* Return non-zero if changes in value of VAR |
1670 | must be detected and reported by -var-update. | |
1671 | Return zero is -var-update should never report | |
1672 | changes of such values. This makes sense for structures | |
1673 | (since the changes in children values will be reported separately), | |
1674 | or for artifical objects (like 'public' pseudo-field in C++). | |
1675 | ||
1676 | Return value of 0 means that gdb need not call value_fetch_lazy | |
1677 | for the value of this variable object. */ | |
8b93c638 | 1678 | static int |
b2c2bd75 | 1679 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
1680 | { |
1681 | int r; | |
1682 | struct type *type; | |
1683 | ||
1684 | if (CPLUS_FAKE_CHILD (var)) | |
1685 | return 0; | |
1686 | ||
1687 | type = get_type (var); | |
1688 | ||
1689 | switch (TYPE_CODE (type)) | |
1690 | { | |
72330bd6 AC |
1691 | case TYPE_CODE_STRUCT: |
1692 | case TYPE_CODE_UNION: | |
1693 | case TYPE_CODE_ARRAY: | |
1694 | r = 0; | |
1695 | break; | |
8b93c638 | 1696 | |
72330bd6 AC |
1697 | default: |
1698 | r = 1; | |
8b93c638 JM |
1699 | } |
1700 | ||
1701 | return r; | |
1702 | } | |
1703 | ||
1704 | /* C */ | |
1705 | static int | |
fba45db2 | 1706 | c_number_of_children (struct varobj *var) |
8b93c638 JM |
1707 | { |
1708 | struct type *type; | |
1709 | struct type *target; | |
1710 | int children; | |
1711 | ||
1712 | type = get_type (var); | |
1713 | target = get_target_type (type); | |
1714 | children = 0; | |
1715 | ||
1716 | switch (TYPE_CODE (type)) | |
1717 | { | |
1718 | case TYPE_CODE_ARRAY: | |
1719 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
72330bd6 | 1720 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) |
8b93c638 JM |
1721 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
1722 | else | |
74a44383 DJ |
1723 | /* If we don't know how many elements there are, don't display |
1724 | any. */ | |
1725 | children = 0; | |
8b93c638 JM |
1726 | break; |
1727 | ||
1728 | case TYPE_CODE_STRUCT: | |
1729 | case TYPE_CODE_UNION: | |
1730 | children = TYPE_NFIELDS (type); | |
1731 | break; | |
1732 | ||
1733 | case TYPE_CODE_PTR: | |
0f0ac1f5 | 1734 | /* This is where things get complicated. All pointers have one child. |
8b93c638 | 1735 | Except, of course, for struct and union ptr, which we automagically |
0f0ac1f5 | 1736 | dereference for the user, and function ptrs which have no children. |
0755e6c1 FN |
1737 | We also don't dereference void* as we don't know what to show. |
1738 | We can show char* so we allow it to be dereferenced. If you decide | |
1739 | to test for it, please mind that a little magic is necessary to | |
1740 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
1741 | TYPE_NAME == "char" */ | |
1742 | ||
8b93c638 JM |
1743 | switch (TYPE_CODE (target)) |
1744 | { | |
1745 | case TYPE_CODE_STRUCT: | |
1746 | case TYPE_CODE_UNION: | |
1747 | children = TYPE_NFIELDS (target); | |
1748 | break; | |
1749 | ||
1750 | case TYPE_CODE_FUNC: | |
0755e6c1 | 1751 | case TYPE_CODE_VOID: |
8b93c638 JM |
1752 | children = 0; |
1753 | break; | |
1754 | ||
1755 | default: | |
0755e6c1 | 1756 | children = 1; |
8b93c638 JM |
1757 | } |
1758 | break; | |
1759 | ||
1760 | default: | |
1761 | /* Other types have no children */ | |
1762 | break; | |
1763 | } | |
1764 | ||
1765 | return children; | |
1766 | } | |
1767 | ||
1768 | static char * | |
fba45db2 | 1769 | c_name_of_variable (struct varobj *parent) |
8b93c638 JM |
1770 | { |
1771 | return savestring (parent->name, strlen (parent->name)); | |
1772 | } | |
1773 | ||
bbec2603 VP |
1774 | /* Return the value of element TYPE_INDEX of a structure |
1775 | value VALUE. VALUE's type should be a structure, | |
1776 | or union, or a typedef to struct/union. | |
1777 | ||
1778 | Returns NULL if getting the value fails. Never throws. */ | |
1779 | static struct value * | |
1780 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 1781 | { |
bbec2603 VP |
1782 | struct value *result = NULL; |
1783 | volatile struct gdb_exception e; | |
8b93c638 | 1784 | |
bbec2603 VP |
1785 | struct type *type = value_type (value); |
1786 | type = check_typedef (type); | |
1787 | ||
1788 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
1789 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 1790 | |
bbec2603 VP |
1791 | TRY_CATCH (e, RETURN_MASK_ERROR) |
1792 | { | |
1793 | if (TYPE_FIELD_STATIC (type, type_index)) | |
1794 | result = value_static_field (type, type_index); | |
1795 | else | |
1796 | result = value_primitive_field (value, 0, type_index, type); | |
1797 | } | |
1798 | if (e.reason < 0) | |
1799 | { | |
1800 | return NULL; | |
1801 | } | |
1802 | else | |
1803 | { | |
1804 | return result; | |
1805 | } | |
1806 | } | |
1807 | ||
1808 | /* Obtain the information about child INDEX of the variable | |
1809 | object PARENT. | |
1810 | If CNAME is not null, sets *CNAME to the name of the child relative | |
1811 | to the parent. | |
1812 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
1813 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
1814 | ||
1815 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
1816 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
1817 | to NULL. */ | |
1818 | static void | |
1819 | c_describe_child (struct varobj *parent, int index, | |
1820 | char **cname, struct value **cvalue, struct type **ctype) | |
1821 | { | |
1822 | struct value *value = parent->value; | |
1823 | struct type *type = get_type (parent); | |
1824 | ||
1825 | if (cname) | |
1826 | *cname = NULL; | |
1827 | if (cvalue) | |
1828 | *cvalue = NULL; | |
1829 | if (ctype) | |
1830 | *ctype = NULL; | |
1831 | ||
1832 | /* Pointers to structures are treated just like | |
1833 | structures when accessing children. */ | |
1834 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
1835 | { | |
1836 | struct type *target_type = get_target_type (type); | |
1837 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
1838 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
1839 | { | |
1840 | if (value) | |
1841 | gdb_value_ind (value, &value); | |
1842 | type = target_type; | |
1843 | } | |
1844 | } | |
1845 | ||
8b93c638 JM |
1846 | switch (TYPE_CODE (type)) |
1847 | { | |
1848 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
1849 | if (cname) |
1850 | *cname = xstrprintf ("%d", index | |
1851 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
1852 | ||
1853 | if (cvalue && value) | |
1854 | { | |
1855 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
1856 | struct value *indval = | |
1857 | value_from_longest (builtin_type_int, (LONGEST) real_index); | |
1858 | gdb_value_subscript (value, indval, cvalue); | |
1859 | } | |
1860 | ||
1861 | if (ctype) | |
1862 | *ctype = get_target_type (type); | |
1863 | ||
8b93c638 JM |
1864 | break; |
1865 | ||
1866 | case TYPE_CODE_STRUCT: | |
1867 | case TYPE_CODE_UNION: | |
bbec2603 VP |
1868 | if (cname) |
1869 | { | |
1870 | char *string = TYPE_FIELD_NAME (type, index); | |
1871 | *cname = savestring (string, strlen (string)); | |
1872 | } | |
1873 | ||
1874 | if (cvalue && value) | |
1875 | { | |
1876 | /* For C, varobj index is the same as type index. */ | |
1877 | *cvalue = value_struct_element_index (value, index); | |
1878 | } | |
1879 | ||
1880 | if (ctype) | |
1881 | *ctype = TYPE_FIELD_TYPE (type, index); | |
1882 | ||
8b93c638 JM |
1883 | break; |
1884 | ||
1885 | case TYPE_CODE_PTR: | |
bbec2603 VP |
1886 | if (cname) |
1887 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 1888 | |
bbec2603 VP |
1889 | if (cvalue && value) |
1890 | gdb_value_ind (value, cvalue); | |
1891 | ||
1892 | if (ctype) | |
1893 | *ctype = get_target_type (type); | |
1894 | ||
8b93c638 JM |
1895 | break; |
1896 | ||
1897 | default: | |
1898 | /* This should not happen */ | |
bbec2603 VP |
1899 | if (cname) |
1900 | *cname = xstrdup ("???"); | |
1901 | /* Don't set value and type, we don't know then. */ | |
8b93c638 | 1902 | } |
bbec2603 | 1903 | } |
8b93c638 | 1904 | |
bbec2603 VP |
1905 | static char * |
1906 | c_name_of_child (struct varobj *parent, int index) | |
1907 | { | |
1908 | char *name; | |
1909 | c_describe_child (parent, index, &name, NULL, NULL); | |
8b93c638 JM |
1910 | return name; |
1911 | } | |
1912 | ||
30b28db1 | 1913 | static struct value * |
fba45db2 | 1914 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 1915 | { |
5e572bb4 | 1916 | struct value *new_val = NULL; |
73a93a32 | 1917 | struct varobj *var = *var_handle; |
8b93c638 JM |
1918 | struct frame_info *fi; |
1919 | int within_scope; | |
1920 | ||
73a93a32 | 1921 | /* Only root variables can be updated... */ |
b2c2bd75 | 1922 | if (!is_root_p (var)) |
73a93a32 JI |
1923 | /* Not a root var */ |
1924 | return NULL; | |
1925 | ||
72330bd6 | 1926 | |
8b93c638 JM |
1927 | /* Determine whether the variable is still around. */ |
1928 | if (var->root->valid_block == NULL) | |
1929 | within_scope = 1; | |
1930 | else | |
1931 | { | |
1932 | reinit_frame_cache (); | |
e64d9b3d | 1933 | fi = frame_find_by_id (var->root->frame); |
8b93c638 JM |
1934 | within_scope = fi != NULL; |
1935 | /* FIXME: select_frame could fail */ | |
d2353924 NR |
1936 | if (fi) |
1937 | { | |
1938 | CORE_ADDR pc = get_frame_pc (fi); | |
1939 | if (pc < BLOCK_START (var->root->valid_block) || | |
1940 | pc >= BLOCK_END (var->root->valid_block)) | |
1941 | within_scope = 0; | |
1942 | select_frame (fi); | |
1943 | } | |
8b93c638 | 1944 | } |
72330bd6 | 1945 | |
8b93c638 JM |
1946 | if (within_scope) |
1947 | { | |
73a93a32 | 1948 | /* We need to catch errors here, because if evaluate |
72330bd6 AC |
1949 | expression fails we just want to make val->error = 1 and |
1950 | go on */ | |
8b93c638 JM |
1951 | if (gdb_evaluate_expression (var->root->exp, &new_val)) |
1952 | { | |
acd65feb VP |
1953 | var->error = 0; |
1954 | release_value (new_val); | |
8b93c638 JM |
1955 | } |
1956 | else | |
1957 | var->error = 1; | |
72330bd6 | 1958 | |
8b93c638 JM |
1959 | return new_val; |
1960 | } | |
1961 | ||
1962 | return NULL; | |
1963 | } | |
1964 | ||
30b28db1 | 1965 | static struct value * |
fba45db2 | 1966 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 1967 | { |
bbec2603 VP |
1968 | struct value *value = NULL; |
1969 | c_describe_child (parent, index, NULL, &value, NULL); | |
8b93c638 JM |
1970 | if (value != NULL) |
1971 | release_value (value); | |
1972 | ||
1973 | return value; | |
1974 | } | |
1975 | ||
1976 | static struct type * | |
fba45db2 | 1977 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 1978 | { |
bbec2603 VP |
1979 | struct type *type = NULL; |
1980 | c_describe_child (parent, index, NULL, NULL, &type); | |
8b93c638 JM |
1981 | return type; |
1982 | } | |
1983 | ||
1984 | static int | |
fba45db2 | 1985 | c_variable_editable (struct varobj *var) |
8b93c638 JM |
1986 | { |
1987 | switch (TYPE_CODE (get_type (var))) | |
1988 | { | |
1989 | case TYPE_CODE_STRUCT: | |
1990 | case TYPE_CODE_UNION: | |
1991 | case TYPE_CODE_ARRAY: | |
1992 | case TYPE_CODE_FUNC: | |
8b93c638 JM |
1993 | case TYPE_CODE_METHOD: |
1994 | return 0; | |
1995 | break; | |
1996 | ||
1997 | default: | |
1998 | return 1; | |
1999 | break; | |
2000 | } | |
2001 | } | |
2002 | ||
2003 | static char * | |
fba45db2 | 2004 | c_value_of_variable (struct varobj *var) |
8b93c638 | 2005 | { |
14b3d9c9 JB |
2006 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2007 | it will print out its children instead of "{...}". So we need to | |
2008 | catch that case explicitly. */ | |
2009 | struct type *type = get_type (var); | |
e64d9b3d | 2010 | |
14b3d9c9 JB |
2011 | /* Strip top-level references. */ |
2012 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2013 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2014 | ||
2015 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2016 | { |
2017 | case TYPE_CODE_STRUCT: | |
2018 | case TYPE_CODE_UNION: | |
2019 | return xstrdup ("{...}"); | |
2020 | /* break; */ | |
2021 | ||
2022 | case TYPE_CODE_ARRAY: | |
2023 | { | |
e64d9b3d | 2024 | char *number; |
b435e160 | 2025 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2026 | return (number); |
8b93c638 JM |
2027 | } |
2028 | /* break; */ | |
2029 | ||
2030 | default: | |
2031 | { | |
575bbeb6 KS |
2032 | if (var->value == NULL) |
2033 | { | |
2034 | /* This can happen if we attempt to get the value of a struct | |
2035 | member when the parent is an invalid pointer. This is an | |
2036 | error condition, so we should tell the caller. */ | |
2037 | return NULL; | |
2038 | } | |
2039 | else | |
2040 | { | |
e64d9b3d MH |
2041 | long dummy; |
2042 | struct ui_file *stb = mem_fileopen (); | |
2043 | struct cleanup *old_chain = make_cleanup_ui_file_delete (stb); | |
2044 | char *thevalue; | |
2045 | ||
b2c2bd75 | 2046 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2047 | gdb_assert (!value_lazy (var->value)); |
806048c6 DJ |
2048 | common_val_print (var->value, stb, |
2049 | format_code[(int) var->format], 1, 0, 0); | |
575bbeb6 KS |
2050 | thevalue = ui_file_xstrdup (stb, &dummy); |
2051 | do_cleanups (old_chain); | |
8b93c638 JM |
2052 | return thevalue; |
2053 | } | |
e64d9b3d | 2054 | } |
8b93c638 JM |
2055 | } |
2056 | } | |
2057 | \f | |
2058 | ||
2059 | /* C++ */ | |
2060 | ||
2061 | static int | |
fba45db2 | 2062 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2063 | { |
2064 | struct type *type; | |
2065 | int children, dont_know; | |
2066 | ||
2067 | dont_know = 1; | |
2068 | children = 0; | |
2069 | ||
2070 | if (!CPLUS_FAKE_CHILD (var)) | |
2071 | { | |
2072 | type = get_type_deref (var); | |
2073 | ||
2074 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2075 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2076 | { |
2077 | int kids[3]; | |
2078 | ||
2079 | cplus_class_num_children (type, kids); | |
2080 | if (kids[v_public] != 0) | |
2081 | children++; | |
2082 | if (kids[v_private] != 0) | |
2083 | children++; | |
2084 | if (kids[v_protected] != 0) | |
2085 | children++; | |
2086 | ||
2087 | /* Add any baseclasses */ | |
2088 | children += TYPE_N_BASECLASSES (type); | |
2089 | dont_know = 0; | |
2090 | ||
2091 | /* FIXME: save children in var */ | |
2092 | } | |
2093 | } | |
2094 | else | |
2095 | { | |
2096 | int kids[3]; | |
2097 | ||
2098 | type = get_type_deref (var->parent); | |
2099 | ||
2100 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2101 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2102 | children = kids[v_public]; |
6e382aa3 | 2103 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2104 | children = kids[v_private]; |
2105 | else | |
2106 | children = kids[v_protected]; | |
2107 | dont_know = 0; | |
2108 | } | |
2109 | ||
2110 | if (dont_know) | |
2111 | children = c_number_of_children (var); | |
2112 | ||
2113 | return children; | |
2114 | } | |
2115 | ||
2116 | /* Compute # of public, private, and protected variables in this class. | |
2117 | That means we need to descend into all baseclasses and find out | |
2118 | how many are there, too. */ | |
2119 | static void | |
1669605f | 2120 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2121 | { |
2122 | int i; | |
2123 | ||
2124 | children[v_public] = 0; | |
2125 | children[v_private] = 0; | |
2126 | children[v_protected] = 0; | |
2127 | ||
2128 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2129 | { | |
2130 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2131 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2132 | continue; |
2133 | ||
2134 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2135 | children[v_protected]++; | |
2136 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2137 | children[v_private]++; | |
2138 | else | |
2139 | children[v_public]++; | |
2140 | } | |
2141 | } | |
2142 | ||
2143 | static char * | |
fba45db2 | 2144 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2145 | { |
2146 | return c_name_of_variable (parent); | |
2147 | } | |
2148 | ||
2149 | static char * | |
fba45db2 | 2150 | cplus_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2151 | { |
2152 | char *name; | |
2153 | struct type *type; | |
8b93c638 JM |
2154 | |
2155 | if (CPLUS_FAKE_CHILD (parent)) | |
2156 | { | |
2157 | /* Looking for children of public, private, or protected. */ | |
2158 | type = get_type_deref (parent->parent); | |
2159 | } | |
2160 | else | |
2161 | type = get_type_deref (parent); | |
2162 | ||
2163 | name = NULL; | |
2164 | switch (TYPE_CODE (type)) | |
2165 | { | |
2166 | case TYPE_CODE_STRUCT: | |
2167 | case TYPE_CODE_UNION: | |
8b93c638 JM |
2168 | if (CPLUS_FAKE_CHILD (parent)) |
2169 | { | |
6e382aa3 JJ |
2170 | /* The fields of the class type are ordered as they |
2171 | appear in the class. We are given an index for a | |
2172 | particular access control type ("public","protected", | |
2173 | or "private"). We must skip over fields that don't | |
2174 | have the access control we are looking for to properly | |
2175 | find the indexed field. */ | |
2176 | int type_index = TYPE_N_BASECLASSES (type); | |
2177 | if (strcmp (parent->name, "private") == 0) | |
2178 | { | |
2179 | while (index >= 0) | |
2180 | { | |
2181 | if (TYPE_VPTR_BASETYPE (type) == type | |
2182 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2183 | ; /* ignore vptr */ | |
2184 | else if (TYPE_FIELD_PRIVATE (type, type_index)) | |
2185 | --index; | |
2186 | ++type_index; | |
2187 | } | |
2188 | --type_index; | |
2189 | } | |
2190 | else if (strcmp (parent->name, "protected") == 0) | |
2191 | { | |
2192 | while (index >= 0) | |
2193 | { | |
2194 | if (TYPE_VPTR_BASETYPE (type) == type | |
2195 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2196 | ; /* ignore vptr */ | |
2197 | else if (TYPE_FIELD_PROTECTED (type, type_index)) | |
2198 | --index; | |
2199 | ++type_index; | |
2200 | } | |
2201 | --type_index; | |
2202 | } | |
2203 | else | |
2204 | { | |
2205 | while (index >= 0) | |
2206 | { | |
2207 | if (TYPE_VPTR_BASETYPE (type) == type | |
2208 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2209 | ; /* ignore vptr */ | |
2210 | else if (!TYPE_FIELD_PRIVATE (type, type_index) && | |
2211 | !TYPE_FIELD_PROTECTED (type, type_index)) | |
2212 | --index; | |
2213 | ++type_index; | |
2214 | } | |
2215 | --type_index; | |
2216 | } | |
2217 | ||
2218 | name = TYPE_FIELD_NAME (type, type_index); | |
8b93c638 JM |
2219 | } |
2220 | else if (index < TYPE_N_BASECLASSES (type)) | |
6e382aa3 | 2221 | /* We are looking up the name of a base class */ |
8b93c638 JM |
2222 | name = TYPE_FIELD_NAME (type, index); |
2223 | else | |
2224 | { | |
6e382aa3 JJ |
2225 | int children[3]; |
2226 | cplus_class_num_children(type, children); | |
2227 | ||
8b93c638 | 2228 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2229 | only be "public", "private", or "protected" |
2230 | ||
2231 | The special "fake" children are always output by varobj in | |
2232 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2233 | index -= TYPE_N_BASECLASSES (type); |
2234 | switch (index) | |
2235 | { | |
2236 | case 0: | |
6e382aa3 JJ |
2237 | if (children[v_public] > 0) |
2238 | name = "public"; | |
2239 | else if (children[v_private] > 0) | |
2240 | name = "private"; | |
2241 | else | |
2242 | name = "protected"; | |
2243 | break; | |
8b93c638 | 2244 | case 1: |
6e382aa3 | 2245 | if (children[v_public] > 0) |
8b93c638 | 2246 | { |
6e382aa3 JJ |
2247 | if (children[v_private] > 0) |
2248 | name = "private"; | |
2249 | else | |
2250 | name = "protected"; | |
8b93c638 | 2251 | } |
6e382aa3 JJ |
2252 | else if (children[v_private] > 0) |
2253 | name = "protected"; | |
2254 | break; | |
8b93c638 | 2255 | case 2: |
6e382aa3 JJ |
2256 | /* Must be protected */ |
2257 | name = "protected"; | |
2258 | break; | |
8b93c638 JM |
2259 | default: |
2260 | /* error! */ | |
2261 | break; | |
2262 | } | |
2263 | } | |
2264 | break; | |
2265 | ||
2266 | default: | |
2267 | break; | |
2268 | } | |
2269 | ||
2270 | if (name == NULL) | |
2271 | return c_name_of_child (parent, index); | |
2272 | else | |
2273 | { | |
2274 | if (name != NULL) | |
2275 | name = savestring (name, strlen (name)); | |
2276 | } | |
2277 | ||
2278 | return name; | |
2279 | } | |
2280 | ||
30b28db1 | 2281 | static struct value * |
fba45db2 | 2282 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2283 | { |
73a93a32 | 2284 | return c_value_of_root (var_handle); |
8b93c638 JM |
2285 | } |
2286 | ||
30b28db1 | 2287 | static struct value * |
fba45db2 | 2288 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2289 | { |
2290 | struct type *type; | |
30b28db1 | 2291 | struct value *value; |
8b93c638 JM |
2292 | |
2293 | if (CPLUS_FAKE_CHILD (parent)) | |
2294 | type = get_type_deref (parent->parent); | |
2295 | else | |
2296 | type = get_type_deref (parent); | |
2297 | ||
2298 | value = NULL; | |
8b93c638 JM |
2299 | |
2300 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
2301 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) | |
2302 | { | |
2303 | if (CPLUS_FAKE_CHILD (parent)) | |
2304 | { | |
5bbc1a8e | 2305 | char *name; |
30b28db1 | 2306 | struct value *temp = parent->parent->value; |
30c6b1fb | 2307 | |
575bbeb6 KS |
2308 | if (temp == NULL) |
2309 | return NULL; | |
2310 | ||
5bbc1a8e | 2311 | name = name_of_child (parent, index); |
30c6b1fb KS |
2312 | gdb_value_struct_elt (NULL, &value, &temp, NULL, name, NULL, |
2313 | "cplus_structure"); | |
2314 | if (value != NULL) | |
2315 | release_value (value); | |
5bbc1a8e KS |
2316 | |
2317 | xfree (name); | |
8b93c638 JM |
2318 | } |
2319 | else if (index >= TYPE_N_BASECLASSES (type)) | |
2320 | { | |
2321 | /* public, private, or protected */ | |
2322 | return NULL; | |
2323 | } | |
2324 | else | |
2325 | { | |
2326 | /* Baseclass */ | |
2327 | if (parent->value != NULL) | |
2328 | { | |
575bbeb6 | 2329 | struct value *temp = NULL; |
8b93c638 | 2330 | |
4ae4f4fb VP |
2331 | /* No special processing for references is needed -- |
2332 | value_cast below handles references. */ | |
2333 | if (TYPE_CODE (value_type (parent->value)) == TYPE_CODE_PTR) | |
4abb499e KS |
2334 | { |
2335 | if (!gdb_value_ind (parent->value, &temp)) | |
2336 | return NULL; | |
2337 | } | |
8b93c638 JM |
2338 | else |
2339 | temp = parent->value; | |
2340 | ||
575bbeb6 KS |
2341 | if (temp != NULL) |
2342 | { | |
2343 | value = value_cast (TYPE_FIELD_TYPE (type, index), temp); | |
2344 | release_value (value); | |
2345 | } | |
2346 | else | |
2347 | { | |
2348 | /* We failed to evaluate the parent's value, so don't even | |
2349 | bother trying to evaluate this child. */ | |
2350 | return NULL; | |
2351 | } | |
8b93c638 JM |
2352 | } |
2353 | } | |
2354 | } | |
2355 | ||
2356 | if (value == NULL) | |
2357 | return c_value_of_child (parent, index); | |
2358 | ||
2359 | return value; | |
2360 | } | |
2361 | ||
2362 | static struct type * | |
fba45db2 | 2363 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2364 | { |
2365 | struct type *type, *t; | |
2366 | ||
575bbeb6 KS |
2367 | if (CPLUS_FAKE_CHILD (parent)) |
2368 | { | |
2369 | /* Looking for the type of a child of public, private, or protected. */ | |
2370 | t = get_type_deref (parent->parent); | |
2371 | } | |
2372 | else | |
2373 | t = get_type_deref (parent); | |
2374 | ||
8b93c638 JM |
2375 | type = NULL; |
2376 | switch (TYPE_CODE (t)) | |
2377 | { | |
2378 | case TYPE_CODE_STRUCT: | |
2379 | case TYPE_CODE_UNION: | |
575bbeb6 | 2380 | if (CPLUS_FAKE_CHILD (parent)) |
8b93c638 | 2381 | { |
575bbeb6 KS |
2382 | char *name = cplus_name_of_child (parent, index); |
2383 | type = lookup_struct_elt_type (t, name, 0); | |
2384 | xfree (name); | |
8b93c638 | 2385 | } |
575bbeb6 KS |
2386 | else if (index < TYPE_N_BASECLASSES (t)) |
2387 | type = TYPE_FIELD_TYPE (t, index); | |
8b93c638 JM |
2388 | else |
2389 | { | |
575bbeb6 KS |
2390 | /* special */ |
2391 | return NULL; | |
8b93c638 JM |
2392 | } |
2393 | break; | |
2394 | ||
2395 | default: | |
2396 | break; | |
2397 | } | |
2398 | ||
2399 | if (type == NULL) | |
2400 | return c_type_of_child (parent, index); | |
2401 | ||
2402 | return type; | |
2403 | } | |
2404 | ||
2405 | static int | |
fba45db2 | 2406 | cplus_variable_editable (struct varobj *var) |
8b93c638 JM |
2407 | { |
2408 | if (CPLUS_FAKE_CHILD (var)) | |
2409 | return 0; | |
2410 | ||
2411 | return c_variable_editable (var); | |
2412 | } | |
2413 | ||
2414 | static char * | |
fba45db2 | 2415 | cplus_value_of_variable (struct varobj *var) |
8b93c638 JM |
2416 | { |
2417 | ||
2418 | /* If we have one of our special types, don't print out | |
2419 | any value. */ | |
2420 | if (CPLUS_FAKE_CHILD (var)) | |
2421 | return xstrdup (""); | |
2422 | ||
2423 | return c_value_of_variable (var); | |
2424 | } | |
2425 | \f | |
2426 | /* Java */ | |
2427 | ||
2428 | static int | |
fba45db2 | 2429 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2430 | { |
2431 | return cplus_number_of_children (var); | |
2432 | } | |
2433 | ||
2434 | static char * | |
fba45db2 | 2435 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2436 | { |
2437 | char *p, *name; | |
2438 | ||
2439 | name = cplus_name_of_variable (parent); | |
2440 | /* If the name has "-" in it, it is because we | |
2441 | needed to escape periods in the name... */ | |
2442 | p = name; | |
2443 | ||
2444 | while (*p != '\000') | |
2445 | { | |
2446 | if (*p == '-') | |
2447 | *p = '.'; | |
2448 | p++; | |
2449 | } | |
2450 | ||
2451 | return name; | |
2452 | } | |
2453 | ||
2454 | static char * | |
fba45db2 | 2455 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2456 | { |
2457 | char *name, *p; | |
2458 | ||
2459 | name = cplus_name_of_child (parent, index); | |
2460 | /* Escape any periods in the name... */ | |
2461 | p = name; | |
2462 | ||
2463 | while (*p != '\000') | |
2464 | { | |
2465 | if (*p == '.') | |
2466 | *p = '-'; | |
2467 | p++; | |
2468 | } | |
2469 | ||
2470 | return name; | |
2471 | } | |
2472 | ||
30b28db1 | 2473 | static struct value * |
fba45db2 | 2474 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2475 | { |
73a93a32 | 2476 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2477 | } |
2478 | ||
30b28db1 | 2479 | static struct value * |
fba45db2 | 2480 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2481 | { |
2482 | return cplus_value_of_child (parent, index); | |
2483 | } | |
2484 | ||
2485 | static struct type * | |
fba45db2 | 2486 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2487 | { |
2488 | return cplus_type_of_child (parent, index); | |
2489 | } | |
2490 | ||
2491 | static int | |
fba45db2 | 2492 | java_variable_editable (struct varobj *var) |
8b93c638 JM |
2493 | { |
2494 | return cplus_variable_editable (var); | |
2495 | } | |
2496 | ||
2497 | static char * | |
fba45db2 | 2498 | java_value_of_variable (struct varobj *var) |
8b93c638 JM |
2499 | { |
2500 | return cplus_value_of_variable (var); | |
2501 | } | |
2502 | \f | |
2503 | extern void _initialize_varobj (void); | |
2504 | void | |
2505 | _initialize_varobj (void) | |
2506 | { | |
2507 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2508 | ||
2509 | varobj_table = xmalloc (sizeof_table); | |
2510 | memset (varobj_table, 0, sizeof_table); | |
2511 | ||
85c07804 AC |
2512 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2513 | &varobjdebug, _("\ | |
2514 | Set varobj debugging."), _("\ | |
2515 | Show varobj debugging."), _("\ | |
2516 | When non-zero, varobj debugging is enabled."), | |
2517 | NULL, | |
920d2a44 | 2518 | show_varobjdebug, |
85c07804 | 2519 | &setlist, &showlist); |
8b93c638 | 2520 | } |