Commit | Line | Data |
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8b93c638 | 1 | /* Implementation of the GDB variable objects API. |
bc8332bb | 2 | |
6aba47ca | 3 | Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
1ecb4ee0 | 4 | Free Software Foundation, Inc. |
8b93c638 JM |
5 | |
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
197e01b6 EZ |
18 | Foundation, Inc., 51 Franklin Street, Fifth Floor, |
19 | Boston, MA 02110-1301, USA. */ | |
8b93c638 JM |
20 | |
21 | #include "defs.h" | |
a6c442d8 | 22 | #include "exceptions.h" |
8b93c638 JM |
23 | #include "value.h" |
24 | #include "expression.h" | |
25 | #include "frame.h" | |
8b93c638 JM |
26 | #include "language.h" |
27 | #include "wrapper.h" | |
28 | #include "gdbcmd.h" | |
d2353924 | 29 | #include "block.h" |
a6c442d8 MK |
30 | |
31 | #include "gdb_assert.h" | |
b66d6d2e | 32 | #include "gdb_string.h" |
8b93c638 JM |
33 | |
34 | #include "varobj.h" | |
28335dcc | 35 | #include "vec.h" |
8b93c638 JM |
36 | |
37 | /* Non-zero if we want to see trace of varobj level stuff. */ | |
38 | ||
39 | int varobjdebug = 0; | |
920d2a44 AC |
40 | static void |
41 | show_varobjdebug (struct ui_file *file, int from_tty, | |
42 | struct cmd_list_element *c, const char *value) | |
43 | { | |
44 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); | |
45 | } | |
8b93c638 JM |
46 | |
47 | /* String representations of gdb's format codes */ | |
48 | char *varobj_format_string[] = | |
72330bd6 | 49 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
8b93c638 JM |
50 | |
51 | /* String representations of gdb's known languages */ | |
72330bd6 | 52 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
8b93c638 JM |
53 | |
54 | /* Data structures */ | |
55 | ||
56 | /* Every root variable has one of these structures saved in its | |
57 | varobj. Members which must be free'd are noted. */ | |
58 | struct varobj_root | |
72330bd6 | 59 | { |
8b93c638 | 60 | |
72330bd6 AC |
61 | /* Alloc'd expression for this parent. */ |
62 | struct expression *exp; | |
8b93c638 | 63 | |
72330bd6 AC |
64 | /* Block for which this expression is valid */ |
65 | struct block *valid_block; | |
8b93c638 | 66 | |
72330bd6 | 67 | /* The frame for this expression */ |
e64d9b3d | 68 | struct frame_id frame; |
8b93c638 | 69 | |
72330bd6 AC |
70 | /* If 1, "update" always recomputes the frame & valid block |
71 | using the currently selected frame. */ | |
72 | int use_selected_frame; | |
73a93a32 | 73 | |
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 | |
b20d8971 VP |
110 | /* The value of this expression or subexpression. A NULL value |
111 | indicates there was an error getting this value. | |
b2c2bd75 VP |
112 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
113 | the value is either NULL, or not lazy. */ | |
30b28db1 | 114 | struct value *value; |
8b93c638 | 115 | |
72330bd6 AC |
116 | /* The number of (immediate) children this variable has */ |
117 | int num_children; | |
8b93c638 | 118 | |
72330bd6 AC |
119 | /* If this object is a child, this points to its immediate parent. */ |
120 | struct varobj *parent; | |
8b93c638 | 121 | |
28335dcc VP |
122 | /* Children of this object. */ |
123 | VEC (varobj_p) *children; | |
8b93c638 | 124 | |
72330bd6 AC |
125 | /* Description of the root variable. Points to root variable for children. */ |
126 | struct varobj_root *root; | |
8b93c638 | 127 | |
72330bd6 AC |
128 | /* The format of the output for this object */ |
129 | enum varobj_display_formats format; | |
fb9b6b35 JJ |
130 | |
131 | /* Was this variable updated via a varobj_set_value operation */ | |
132 | int updated; | |
85265413 NR |
133 | |
134 | /* Last print value. */ | |
135 | char *print_value; | |
72330bd6 | 136 | }; |
8b93c638 | 137 | |
8b93c638 | 138 | struct cpstack |
72330bd6 AC |
139 | { |
140 | char *name; | |
141 | struct cpstack *next; | |
142 | }; | |
8b93c638 JM |
143 | |
144 | /* A list of varobjs */ | |
145 | ||
146 | struct vlist | |
72330bd6 AC |
147 | { |
148 | struct varobj *var; | |
149 | struct vlist *next; | |
150 | }; | |
8b93c638 JM |
151 | |
152 | /* Private function prototypes */ | |
153 | ||
154 | /* Helper functions for the above subcommands. */ | |
155 | ||
a14ed312 | 156 | static int delete_variable (struct cpstack **, struct varobj *, int); |
8b93c638 | 157 | |
a14ed312 KB |
158 | static void delete_variable_1 (struct cpstack **, int *, |
159 | struct varobj *, int, int); | |
8b93c638 | 160 | |
a14ed312 | 161 | static int install_variable (struct varobj *); |
8b93c638 | 162 | |
a14ed312 | 163 | static void uninstall_variable (struct varobj *); |
8b93c638 | 164 | |
a14ed312 | 165 | static struct varobj *create_child (struct varobj *, int, char *); |
8b93c638 | 166 | |
8b93c638 JM |
167 | /* Utility routines */ |
168 | ||
a14ed312 | 169 | static struct varobj *new_variable (void); |
8b93c638 | 170 | |
a14ed312 | 171 | static struct varobj *new_root_variable (void); |
8b93c638 | 172 | |
a14ed312 | 173 | static void free_variable (struct varobj *var); |
8b93c638 | 174 | |
74b7792f AC |
175 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
176 | ||
a14ed312 | 177 | static struct type *get_type (struct varobj *var); |
8b93c638 | 178 | |
6e2a9270 VP |
179 | static struct type *get_value_type (struct varobj *var); |
180 | ||
a14ed312 | 181 | static struct type *get_type_deref (struct varobj *var); |
8b93c638 | 182 | |
a14ed312 | 183 | static struct type *get_target_type (struct type *); |
8b93c638 | 184 | |
a14ed312 | 185 | static enum varobj_display_formats variable_default_display (struct varobj *); |
8b93c638 | 186 | |
a14ed312 | 187 | static void cppush (struct cpstack **pstack, char *name); |
8b93c638 | 188 | |
a14ed312 | 189 | static char *cppop (struct cpstack **pstack); |
8b93c638 | 190 | |
acd65feb VP |
191 | static int install_new_value (struct varobj *var, struct value *value, |
192 | int initial); | |
193 | ||
8b93c638 JM |
194 | /* Language-specific routines. */ |
195 | ||
a14ed312 | 196 | static enum varobj_languages variable_language (struct varobj *var); |
8b93c638 | 197 | |
a14ed312 | 198 | static int number_of_children (struct varobj *); |
8b93c638 | 199 | |
a14ed312 | 200 | static char *name_of_variable (struct varobj *); |
8b93c638 | 201 | |
a14ed312 | 202 | static char *name_of_child (struct varobj *, int); |
8b93c638 | 203 | |
30b28db1 | 204 | static struct value *value_of_root (struct varobj **var_handle, int *); |
8b93c638 | 205 | |
30b28db1 | 206 | static struct value *value_of_child (struct varobj *parent, int index); |
8b93c638 | 207 | |
a14ed312 | 208 | static int variable_editable (struct varobj *var); |
8b93c638 | 209 | |
a14ed312 | 210 | static char *my_value_of_variable (struct varobj *var); |
8b93c638 | 211 | |
85265413 NR |
212 | static char *value_get_print_value (struct value *value, |
213 | enum varobj_display_formats format); | |
214 | ||
b2c2bd75 VP |
215 | static int varobj_value_is_changeable_p (struct varobj *var); |
216 | ||
217 | static int is_root_p (struct varobj *var); | |
8b93c638 JM |
218 | |
219 | /* C implementation */ | |
220 | ||
a14ed312 | 221 | static int c_number_of_children (struct varobj *var); |
8b93c638 | 222 | |
a14ed312 | 223 | static char *c_name_of_variable (struct varobj *parent); |
8b93c638 | 224 | |
a14ed312 | 225 | static char *c_name_of_child (struct varobj *parent, int index); |
8b93c638 | 226 | |
30b28db1 | 227 | static struct value *c_value_of_root (struct varobj **var_handle); |
8b93c638 | 228 | |
30b28db1 | 229 | static struct value *c_value_of_child (struct varobj *parent, int index); |
8b93c638 | 230 | |
a14ed312 | 231 | static struct type *c_type_of_child (struct varobj *parent, int index); |
8b93c638 | 232 | |
a14ed312 | 233 | static int c_variable_editable (struct varobj *var); |
8b93c638 | 234 | |
a14ed312 | 235 | static char *c_value_of_variable (struct varobj *var); |
8b93c638 JM |
236 | |
237 | /* C++ implementation */ | |
238 | ||
a14ed312 | 239 | static int cplus_number_of_children (struct varobj *var); |
8b93c638 | 240 | |
a14ed312 | 241 | static void cplus_class_num_children (struct type *type, int children[3]); |
8b93c638 | 242 | |
a14ed312 | 243 | static char *cplus_name_of_variable (struct varobj *parent); |
8b93c638 | 244 | |
a14ed312 | 245 | static char *cplus_name_of_child (struct varobj *parent, int index); |
8b93c638 | 246 | |
30b28db1 | 247 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
8b93c638 | 248 | |
30b28db1 | 249 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
8b93c638 | 250 | |
a14ed312 | 251 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
8b93c638 | 252 | |
a14ed312 | 253 | static int cplus_variable_editable (struct varobj *var); |
8b93c638 | 254 | |
a14ed312 | 255 | static char *cplus_value_of_variable (struct varobj *var); |
8b93c638 JM |
256 | |
257 | /* Java implementation */ | |
258 | ||
a14ed312 | 259 | static int java_number_of_children (struct varobj *var); |
8b93c638 | 260 | |
a14ed312 | 261 | static char *java_name_of_variable (struct varobj *parent); |
8b93c638 | 262 | |
a14ed312 | 263 | static char *java_name_of_child (struct varobj *parent, int index); |
8b93c638 | 264 | |
30b28db1 | 265 | static struct value *java_value_of_root (struct varobj **var_handle); |
8b93c638 | 266 | |
30b28db1 | 267 | static struct value *java_value_of_child (struct varobj *parent, int index); |
8b93c638 | 268 | |
a14ed312 | 269 | static struct type *java_type_of_child (struct varobj *parent, int index); |
8b93c638 | 270 | |
a14ed312 | 271 | static int java_variable_editable (struct varobj *var); |
8b93c638 | 272 | |
a14ed312 | 273 | static char *java_value_of_variable (struct varobj *var); |
8b93c638 JM |
274 | |
275 | /* The language specific vector */ | |
276 | ||
277 | struct language_specific | |
72330bd6 | 278 | { |
8b93c638 | 279 | |
72330bd6 AC |
280 | /* The language of this variable */ |
281 | enum varobj_languages language; | |
8b93c638 | 282 | |
72330bd6 AC |
283 | /* The number of children of PARENT. */ |
284 | int (*number_of_children) (struct varobj * parent); | |
8b93c638 | 285 | |
72330bd6 AC |
286 | /* The name (expression) of a root varobj. */ |
287 | char *(*name_of_variable) (struct varobj * parent); | |
8b93c638 | 288 | |
72330bd6 AC |
289 | /* The name of the INDEX'th child of PARENT. */ |
290 | char *(*name_of_child) (struct varobj * parent, int index); | |
8b93c638 | 291 | |
30b28db1 AC |
292 | /* The ``struct value *'' of the root variable ROOT. */ |
293 | struct value *(*value_of_root) (struct varobj ** root_handle); | |
8b93c638 | 294 | |
30b28db1 AC |
295 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
296 | struct value *(*value_of_child) (struct varobj * parent, int index); | |
8b93c638 | 297 | |
72330bd6 AC |
298 | /* The type of the INDEX'th child of PARENT. */ |
299 | struct type *(*type_of_child) (struct varobj * parent, int index); | |
8b93c638 | 300 | |
72330bd6 AC |
301 | /* Is VAR editable? */ |
302 | int (*variable_editable) (struct varobj * var); | |
8b93c638 | 303 | |
72330bd6 AC |
304 | /* The current value of VAR. */ |
305 | char *(*value_of_variable) (struct varobj * var); | |
306 | }; | |
8b93c638 JM |
307 | |
308 | /* Array of known source language routines. */ | |
d5d6fca5 | 309 | static struct language_specific languages[vlang_end] = { |
8b93c638 JM |
310 | /* Unknown (try treating as C */ |
311 | { | |
72330bd6 AC |
312 | vlang_unknown, |
313 | c_number_of_children, | |
314 | c_name_of_variable, | |
315 | c_name_of_child, | |
316 | c_value_of_root, | |
317 | c_value_of_child, | |
318 | c_type_of_child, | |
319 | c_variable_editable, | |
320 | c_value_of_variable} | |
8b93c638 JM |
321 | , |
322 | /* C */ | |
323 | { | |
72330bd6 AC |
324 | vlang_c, |
325 | c_number_of_children, | |
326 | c_name_of_variable, | |
327 | c_name_of_child, | |
328 | c_value_of_root, | |
329 | c_value_of_child, | |
330 | c_type_of_child, | |
331 | c_variable_editable, | |
332 | c_value_of_variable} | |
8b93c638 JM |
333 | , |
334 | /* C++ */ | |
335 | { | |
72330bd6 AC |
336 | vlang_cplus, |
337 | cplus_number_of_children, | |
338 | cplus_name_of_variable, | |
339 | cplus_name_of_child, | |
340 | cplus_value_of_root, | |
341 | cplus_value_of_child, | |
342 | cplus_type_of_child, | |
343 | cplus_variable_editable, | |
344 | cplus_value_of_variable} | |
8b93c638 JM |
345 | , |
346 | /* Java */ | |
347 | { | |
72330bd6 AC |
348 | vlang_java, |
349 | java_number_of_children, | |
350 | java_name_of_variable, | |
351 | java_name_of_child, | |
352 | java_value_of_root, | |
353 | java_value_of_child, | |
354 | java_type_of_child, | |
355 | java_variable_editable, | |
356 | java_value_of_variable} | |
8b93c638 JM |
357 | }; |
358 | ||
359 | /* A little convenience enum for dealing with C++/Java */ | |
360 | enum vsections | |
72330bd6 AC |
361 | { |
362 | v_public = 0, v_private, v_protected | |
363 | }; | |
8b93c638 JM |
364 | |
365 | /* Private data */ | |
366 | ||
367 | /* Mappings of varobj_display_formats enums to gdb's format codes */ | |
72330bd6 | 368 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
8b93c638 JM |
369 | |
370 | /* Header of the list of root variable objects */ | |
371 | static struct varobj_root *rootlist; | |
372 | static int rootcount = 0; /* number of root varobjs in the list */ | |
373 | ||
374 | /* Prime number indicating the number of buckets in the hash table */ | |
375 | /* A prime large enough to avoid too many colisions */ | |
376 | #define VAROBJ_TABLE_SIZE 227 | |
377 | ||
378 | /* Pointer to the varobj hash table (built at run time) */ | |
379 | static struct vlist **varobj_table; | |
380 | ||
8b93c638 JM |
381 | /* Is the variable X one of our "fake" children? */ |
382 | #define CPLUS_FAKE_CHILD(x) \ | |
383 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) | |
384 | \f | |
385 | ||
386 | /* API Implementation */ | |
b2c2bd75 VP |
387 | static int |
388 | is_root_p (struct varobj *var) | |
389 | { | |
390 | return (var->root->rootvar == var); | |
391 | } | |
8b93c638 JM |
392 | |
393 | /* Creates a varobj (not its children) */ | |
394 | ||
7d8547c9 AC |
395 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
396 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ | |
397 | ||
398 | static struct frame_info * | |
399 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) | |
400 | { | |
401 | struct frame_info *frame = NULL; | |
402 | ||
403 | if (frame_addr == (CORE_ADDR) 0) | |
404 | return NULL; | |
405 | ||
406 | while (1) | |
407 | { | |
408 | frame = get_prev_frame (frame); | |
409 | if (frame == NULL) | |
410 | return NULL; | |
eb5492fa | 411 | if (get_frame_base_address (frame) == frame_addr) |
7d8547c9 AC |
412 | return frame; |
413 | } | |
414 | } | |
415 | ||
8b93c638 JM |
416 | struct varobj * |
417 | varobj_create (char *objname, | |
72330bd6 | 418 | char *expression, CORE_ADDR frame, enum varobj_type type) |
8b93c638 JM |
419 | { |
420 | struct varobj *var; | |
2c67cb8b AC |
421 | struct frame_info *fi; |
422 | struct frame_info *old_fi = NULL; | |
8b93c638 JM |
423 | struct block *block; |
424 | struct cleanup *old_chain; | |
425 | ||
426 | /* Fill out a varobj structure for the (root) variable being constructed. */ | |
427 | var = new_root_variable (); | |
74b7792f | 428 | old_chain = make_cleanup_free_variable (var); |
8b93c638 JM |
429 | |
430 | if (expression != NULL) | |
431 | { | |
432 | char *p; | |
433 | enum varobj_languages lang; | |
acd65feb | 434 | struct value *value; |
8b93c638 JM |
435 | |
436 | /* Parse and evaluate the expression, filling in as much | |
437 | of the variable's data as possible */ | |
438 | ||
439 | /* Allow creator to specify context of variable */ | |
72330bd6 | 440 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
6e7f8b9c | 441 | fi = deprecated_selected_frame; |
8b93c638 | 442 | else |
7d8547c9 AC |
443 | /* FIXME: cagney/2002-11-23: This code should be doing a |
444 | lookup using the frame ID and not just the frame's | |
445 | ``address''. This, of course, means an interface change. | |
446 | However, with out that interface change ISAs, such as the | |
447 | ia64 with its two stacks, won't work. Similar goes for the | |
448 | case where there is a frameless function. */ | |
8b93c638 JM |
449 | fi = find_frame_addr_in_frame_chain (frame); |
450 | ||
73a93a32 JI |
451 | /* frame = -2 means always use selected frame */ |
452 | if (type == USE_SELECTED_FRAME) | |
453 | var->root->use_selected_frame = 1; | |
454 | ||
8b93c638 JM |
455 | block = NULL; |
456 | if (fi != NULL) | |
ae767bfb | 457 | block = get_frame_block (fi, 0); |
8b93c638 JM |
458 | |
459 | p = expression; | |
460 | innermost_block = NULL; | |
73a93a32 JI |
461 | /* Wrap the call to parse expression, so we can |
462 | return a sensible error. */ | |
463 | if (!gdb_parse_exp_1 (&p, block, 0, &var->root->exp)) | |
464 | { | |
465 | return NULL; | |
466 | } | |
8b93c638 JM |
467 | |
468 | /* Don't allow variables to be created for types. */ | |
469 | if (var->root->exp->elts[0].opcode == OP_TYPE) | |
470 | { | |
471 | do_cleanups (old_chain); | |
bc8332bb AC |
472 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
473 | " as an expression.\n"); | |
8b93c638 JM |
474 | return NULL; |
475 | } | |
476 | ||
477 | var->format = variable_default_display (var); | |
478 | var->root->valid_block = innermost_block; | |
479 | var->name = savestring (expression, strlen (expression)); | |
480 | ||
481 | /* When the frame is different from the current frame, | |
482 | we must select the appropriate frame before parsing | |
483 | the expression, otherwise the value will not be current. | |
484 | Since select_frame is so benign, just call it for all cases. */ | |
485 | if (fi != NULL) | |
486 | { | |
7a424e99 | 487 | var->root->frame = get_frame_id (fi); |
6e7f8b9c | 488 | old_fi = deprecated_selected_frame; |
0f7d239c | 489 | select_frame (fi); |
8b93c638 JM |
490 | } |
491 | ||
492 | /* We definitively need to catch errors here. | |
493 | If evaluate_expression succeeds we got the value we wanted. | |
494 | But if it fails, we still go on with a call to evaluate_type() */ | |
acd65feb VP |
495 | if (!gdb_evaluate_expression (var->root->exp, &value)) |
496 | /* Error getting the value. Try to at least get the | |
497 | right type. */ | |
498 | value = evaluate_type (var->root->exp); | |
499 | ||
acd65feb | 500 | var->type = value_type (value); |
acd65feb | 501 | install_new_value (var, value, 1 /* Initial assignment */); |
8b93c638 JM |
502 | |
503 | /* Set language info */ | |
504 | lang = variable_language (var); | |
d5d6fca5 | 505 | var->root->lang = &languages[lang]; |
8b93c638 JM |
506 | |
507 | /* Set ourselves as our root */ | |
508 | var->root->rootvar = var; | |
509 | ||
510 | /* Reset the selected frame */ | |
511 | if (fi != NULL) | |
0f7d239c | 512 | select_frame (old_fi); |
8b93c638 JM |
513 | } |
514 | ||
73a93a32 JI |
515 | /* If the variable object name is null, that means this |
516 | is a temporary variable, so don't install it. */ | |
517 | ||
518 | if ((var != NULL) && (objname != NULL)) | |
8b93c638 JM |
519 | { |
520 | var->obj_name = savestring (objname, strlen (objname)); | |
521 | ||
522 | /* If a varobj name is duplicated, the install will fail so | |
523 | we must clenup */ | |
524 | if (!install_variable (var)) | |
525 | { | |
526 | do_cleanups (old_chain); | |
527 | return NULL; | |
528 | } | |
529 | } | |
530 | ||
531 | discard_cleanups (old_chain); | |
532 | return var; | |
533 | } | |
534 | ||
535 | /* Generates an unique name that can be used for a varobj */ | |
536 | ||
537 | char * | |
538 | varobj_gen_name (void) | |
539 | { | |
540 | static int id = 0; | |
e64d9b3d | 541 | char *obj_name; |
8b93c638 JM |
542 | |
543 | /* generate a name for this object */ | |
544 | id++; | |
b435e160 | 545 | obj_name = xstrprintf ("var%d", id); |
8b93c638 | 546 | |
e64d9b3d | 547 | return obj_name; |
8b93c638 JM |
548 | } |
549 | ||
550 | /* Given an "objname", returns the pointer to the corresponding varobj | |
551 | or NULL if not found */ | |
552 | ||
553 | struct varobj * | |
554 | varobj_get_handle (char *objname) | |
555 | { | |
556 | struct vlist *cv; | |
557 | const char *chp; | |
558 | unsigned int index = 0; | |
559 | unsigned int i = 1; | |
560 | ||
561 | for (chp = objname; *chp; chp++) | |
562 | { | |
563 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
564 | } | |
565 | ||
566 | cv = *(varobj_table + index); | |
567 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) | |
568 | cv = cv->next; | |
569 | ||
570 | if (cv == NULL) | |
8a3fe4f8 | 571 | error (_("Variable object not found")); |
8b93c638 JM |
572 | |
573 | return cv->var; | |
574 | } | |
575 | ||
576 | /* Given the handle, return the name of the object */ | |
577 | ||
578 | char * | |
579 | varobj_get_objname (struct varobj *var) | |
580 | { | |
581 | return var->obj_name; | |
582 | } | |
583 | ||
584 | /* Given the handle, return the expression represented by the object */ | |
585 | ||
586 | char * | |
587 | varobj_get_expression (struct varobj *var) | |
588 | { | |
589 | return name_of_variable (var); | |
590 | } | |
591 | ||
592 | /* Deletes a varobj and all its children if only_children == 0, | |
593 | otherwise deletes only the children; returns a malloc'ed list of all the | |
594 | (malloc'ed) names of the variables that have been deleted (NULL terminated) */ | |
595 | ||
596 | int | |
597 | varobj_delete (struct varobj *var, char ***dellist, int only_children) | |
598 | { | |
599 | int delcount; | |
600 | int mycount; | |
601 | struct cpstack *result = NULL; | |
602 | char **cp; | |
603 | ||
604 | /* Initialize a stack for temporary results */ | |
605 | cppush (&result, NULL); | |
606 | ||
607 | if (only_children) | |
608 | /* Delete only the variable children */ | |
609 | delcount = delete_variable (&result, var, 1 /* only the children */ ); | |
610 | else | |
611 | /* Delete the variable and all its children */ | |
612 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); | |
613 | ||
614 | /* We may have been asked to return a list of what has been deleted */ | |
615 | if (dellist != NULL) | |
616 | { | |
617 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); | |
618 | ||
619 | cp = *dellist; | |
620 | mycount = delcount; | |
621 | *cp = cppop (&result); | |
622 | while ((*cp != NULL) && (mycount > 0)) | |
623 | { | |
624 | mycount--; | |
625 | cp++; | |
626 | *cp = cppop (&result); | |
627 | } | |
628 | ||
629 | if (mycount || (*cp != NULL)) | |
8a3fe4f8 | 630 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
72330bd6 | 631 | mycount); |
8b93c638 JM |
632 | } |
633 | ||
634 | return delcount; | |
635 | } | |
636 | ||
637 | /* Set/Get variable object display format */ | |
638 | ||
639 | enum varobj_display_formats | |
640 | varobj_set_display_format (struct varobj *var, | |
641 | enum varobj_display_formats format) | |
642 | { | |
643 | switch (format) | |
644 | { | |
645 | case FORMAT_NATURAL: | |
646 | case FORMAT_BINARY: | |
647 | case FORMAT_DECIMAL: | |
648 | case FORMAT_HEXADECIMAL: | |
649 | case FORMAT_OCTAL: | |
650 | var->format = format; | |
651 | break; | |
652 | ||
653 | default: | |
654 | var->format = variable_default_display (var); | |
655 | } | |
656 | ||
657 | return var->format; | |
658 | } | |
659 | ||
660 | enum varobj_display_formats | |
661 | varobj_get_display_format (struct varobj *var) | |
662 | { | |
663 | return var->format; | |
664 | } | |
665 | ||
666 | int | |
667 | varobj_get_num_children (struct varobj *var) | |
668 | { | |
669 | if (var->num_children == -1) | |
670 | var->num_children = number_of_children (var); | |
671 | ||
672 | return var->num_children; | |
673 | } | |
674 | ||
675 | /* Creates a list of the immediate children of a variable object; | |
676 | the return code is the number of such children or -1 on error */ | |
677 | ||
678 | int | |
679 | varobj_list_children (struct varobj *var, struct varobj ***childlist) | |
680 | { | |
681 | struct varobj *child; | |
682 | char *name; | |
683 | int i; | |
684 | ||
685 | /* sanity check: have we been passed a pointer? */ | |
686 | if (childlist == NULL) | |
687 | return -1; | |
688 | ||
689 | *childlist = NULL; | |
690 | ||
691 | if (var->num_children == -1) | |
692 | var->num_children = number_of_children (var); | |
693 | ||
74a44383 DJ |
694 | /* If that failed, give up. */ |
695 | if (var->num_children == -1) | |
696 | return -1; | |
697 | ||
28335dcc VP |
698 | /* If we're called when the list of children is not yet initialized, |
699 | allocate enough elements in it. */ | |
700 | while (VEC_length (varobj_p, var->children) < var->num_children) | |
701 | VEC_safe_push (varobj_p, var->children, NULL); | |
702 | ||
8b93c638 JM |
703 | /* List of children */ |
704 | *childlist = xmalloc ((var->num_children + 1) * sizeof (struct varobj *)); | |
705 | ||
706 | for (i = 0; i < var->num_children; i++) | |
707 | { | |
28335dcc VP |
708 | varobj_p existing; |
709 | ||
8b93c638 JM |
710 | /* Mark as the end in case we bail out */ |
711 | *((*childlist) + i) = NULL; | |
712 | ||
28335dcc VP |
713 | existing = VEC_index (varobj_p, var->children, i); |
714 | ||
715 | if (existing == NULL) | |
716 | { | |
717 | /* Either it's the first call to varobj_list_children for | |
718 | this variable object, and the child was never created, | |
719 | or it was explicitly deleted by the client. */ | |
720 | name = name_of_child (var, i); | |
721 | existing = create_child (var, i, name); | |
722 | VEC_replace (varobj_p, var->children, i, existing); | |
723 | } | |
8b93c638 | 724 | |
28335dcc | 725 | *((*childlist) + i) = existing; |
8b93c638 JM |
726 | } |
727 | ||
728 | /* End of list is marked by a NULL pointer */ | |
729 | *((*childlist) + i) = NULL; | |
730 | ||
731 | return var->num_children; | |
732 | } | |
733 | ||
734 | /* Obtain the type of an object Variable as a string similar to the one gdb | |
735 | prints on the console */ | |
736 | ||
737 | char * | |
738 | varobj_get_type (struct varobj *var) | |
739 | { | |
30b28db1 | 740 | struct value *val; |
8b93c638 JM |
741 | struct cleanup *old_chain; |
742 | struct ui_file *stb; | |
743 | char *thetype; | |
744 | long length; | |
745 | ||
746 | /* For the "fake" variables, do not return a type. (It's type is | |
747 | NULL, too.) */ | |
748 | if (CPLUS_FAKE_CHILD (var)) | |
749 | return NULL; | |
750 | ||
751 | stb = mem_fileopen (); | |
752 | old_chain = make_cleanup_ui_file_delete (stb); | |
753 | ||
30b28db1 | 754 | /* To print the type, we simply create a zero ``struct value *'' and |
8b93c638 JM |
755 | cast it to our type. We then typeprint this variable. */ |
756 | val = value_zero (var->type, not_lval); | |
df407dfe | 757 | type_print (value_type (val), "", stb, -1); |
8b93c638 JM |
758 | |
759 | thetype = ui_file_xstrdup (stb, &length); | |
760 | do_cleanups (old_chain); | |
761 | return thetype; | |
762 | } | |
763 | ||
1ecb4ee0 DJ |
764 | /* Obtain the type of an object variable. */ |
765 | ||
766 | struct type * | |
767 | varobj_get_gdb_type (struct varobj *var) | |
768 | { | |
769 | return var->type; | |
770 | } | |
771 | ||
8b93c638 JM |
772 | enum varobj_languages |
773 | varobj_get_language (struct varobj *var) | |
774 | { | |
775 | return variable_language (var); | |
776 | } | |
777 | ||
778 | int | |
779 | varobj_get_attributes (struct varobj *var) | |
780 | { | |
781 | int attributes = 0; | |
782 | ||
783 | if (variable_editable (var)) | |
784 | /* FIXME: define masks for attributes */ | |
785 | attributes |= 0x00000001; /* Editable */ | |
786 | ||
787 | return attributes; | |
788 | } | |
789 | ||
790 | char * | |
791 | varobj_get_value (struct varobj *var) | |
792 | { | |
793 | return my_value_of_variable (var); | |
794 | } | |
795 | ||
796 | /* Set the value of an object variable (if it is editable) to the | |
797 | value of the given expression */ | |
798 | /* Note: Invokes functions that can call error() */ | |
799 | ||
800 | int | |
801 | varobj_set_value (struct varobj *var, char *expression) | |
802 | { | |
30b28db1 | 803 | struct value *val; |
8b93c638 | 804 | int offset = 0; |
a6c442d8 | 805 | int error = 0; |
8b93c638 JM |
806 | |
807 | /* The argument "expression" contains the variable's new value. | |
808 | We need to first construct a legal expression for this -- ugh! */ | |
809 | /* Does this cover all the bases? */ | |
810 | struct expression *exp; | |
30b28db1 | 811 | struct value *value; |
8b93c638 JM |
812 | int saved_input_radix = input_radix; |
813 | ||
b20d8971 | 814 | if (var->value != NULL && variable_editable (var)) |
8b93c638 JM |
815 | { |
816 | char *s = expression; | |
817 | int i; | |
8b93c638 JM |
818 | |
819 | input_radix = 10; /* ALWAYS reset to decimal temporarily */ | |
7a24eb7c | 820 | exp = parse_exp_1 (&s, 0, 0); |
8b93c638 JM |
821 | if (!gdb_evaluate_expression (exp, &value)) |
822 | { | |
823 | /* We cannot proceed without a valid expression. */ | |
8038e1e2 | 824 | xfree (exp); |
8b93c638 JM |
825 | return 0; |
826 | } | |
827 | ||
acd65feb | 828 | /* All types that are editable must also be changeable. */ |
b2c2bd75 | 829 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb VP |
830 | |
831 | /* The value of a changeable variable object must not be lazy. */ | |
832 | gdb_assert (!value_lazy (var->value)); | |
833 | ||
834 | /* Need to coerce the input. We want to check if the | |
835 | value of the variable object will be different | |
836 | after assignment, and the first thing value_assign | |
837 | does is coerce the input. | |
838 | For example, if we are assigning an array to a pointer variable we | |
839 | should compare the pointer with the the array's address, not with the | |
840 | array's content. */ | |
841 | value = coerce_array (value); | |
842 | ||
acd65feb VP |
843 | /* The new value may be lazy. gdb_value_assign, or |
844 | rather value_contents, will take care of this. | |
845 | If fetching of the new value will fail, gdb_value_assign | |
846 | with catch the exception. */ | |
575bbeb6 | 847 | if (!gdb_value_assign (var->value, value, &val)) |
8a1a0112 | 848 | return 0; |
b26ed50d | 849 | |
ae097835 VP |
850 | /* If the value has changed, record it, so that next -var-update can |
851 | report this change. If a variable had a value of '1', we've set it | |
852 | to '333' and then set again to '1', when -var-update will report this | |
853 | variable as changed -- because the first assignment has set the | |
854 | 'updated' flag. There's no need to optimize that, because return value | |
855 | of -var-update should be considered an approximation. */ | |
856 | var->updated = install_new_value (var, val, 0 /* Compare values. */); | |
8b93c638 JM |
857 | input_radix = saved_input_radix; |
858 | return 1; | |
859 | } | |
860 | ||
861 | return 0; | |
862 | } | |
863 | ||
864 | /* Returns a malloc'ed list with all root variable objects */ | |
865 | int | |
866 | varobj_list (struct varobj ***varlist) | |
867 | { | |
868 | struct varobj **cv; | |
869 | struct varobj_root *croot; | |
870 | int mycount = rootcount; | |
871 | ||
872 | /* Alloc (rootcount + 1) entries for the result */ | |
873 | *varlist = xmalloc ((rootcount + 1) * sizeof (struct varobj *)); | |
874 | ||
875 | cv = *varlist; | |
876 | croot = rootlist; | |
877 | while ((croot != NULL) && (mycount > 0)) | |
878 | { | |
879 | *cv = croot->rootvar; | |
880 | mycount--; | |
881 | cv++; | |
882 | croot = croot->next; | |
883 | } | |
884 | /* Mark the end of the list */ | |
885 | *cv = NULL; | |
886 | ||
887 | if (mycount || (croot != NULL)) | |
72330bd6 AC |
888 | warning |
889 | ("varobj_list: assertion failed - wrong tally of root vars (%d:%d)", | |
890 | rootcount, mycount); | |
8b93c638 JM |
891 | |
892 | return rootcount; | |
893 | } | |
894 | ||
acd65feb VP |
895 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
896 | this is the first assignement after the variable object was just | |
897 | created, or changed type. In that case, just assign the value | |
898 | and return 0. | |
899 | Otherwise, assign the value and if type_changeable returns non-zero, | |
900 | find if the new value is different from the current value. | |
b26ed50d VP |
901 | Return 1 if so, and 0 if the values are equal. |
902 | ||
903 | The VALUE parameter should not be released -- the function will | |
904 | take care of releasing it when needed. */ | |
acd65feb VP |
905 | static int |
906 | install_new_value (struct varobj *var, struct value *value, int initial) | |
907 | { | |
908 | int changeable; | |
909 | int need_to_fetch; | |
910 | int changed = 0; | |
911 | ||
acd65feb VP |
912 | /* We need to know the varobj's type to decide if the value should |
913 | be fetched or not. C++ fake children (public/protected/private) don't have | |
914 | a type. */ | |
915 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); | |
b2c2bd75 | 916 | changeable = varobj_value_is_changeable_p (var); |
acd65feb VP |
917 | need_to_fetch = changeable; |
918 | ||
b26ed50d VP |
919 | /* We are not interested in the address of references, and given |
920 | that in C++ a reference is not rebindable, it cannot | |
921 | meaningfully change. So, get hold of the real value. */ | |
922 | if (value) | |
923 | { | |
924 | value = coerce_ref (value); | |
925 | release_value (value); | |
926 | } | |
927 | ||
acd65feb VP |
928 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
929 | /* For unions, we need to fetch the value implicitly because | |
930 | of implementation of union member fetch. When gdb | |
931 | creates a value for a field and the value of the enclosing | |
932 | structure is not lazy, it immediately copies the necessary | |
933 | bytes from the enclosing values. If the enclosing value is | |
934 | lazy, the call to value_fetch_lazy on the field will read | |
935 | the data from memory. For unions, that means we'll read the | |
936 | same memory more than once, which is not desirable. So | |
937 | fetch now. */ | |
938 | need_to_fetch = 1; | |
939 | ||
940 | /* The new value might be lazy. If the type is changeable, | |
941 | that is we'll be comparing values of this type, fetch the | |
942 | value now. Otherwise, on the next update the old value | |
943 | will be lazy, which means we've lost that old value. */ | |
944 | if (need_to_fetch && value && value_lazy (value)) | |
945 | { | |
946 | if (!gdb_value_fetch_lazy (value)) | |
947 | { | |
acd65feb VP |
948 | /* Set the value to NULL, so that for the next -var-update, |
949 | we don't try to compare the new value with this value, | |
950 | that we couldn't even read. */ | |
951 | value = NULL; | |
952 | } | |
acd65feb VP |
953 | } |
954 | ||
955 | /* If the type is changeable, compare the old and the new values. | |
956 | If this is the initial assignment, we don't have any old value | |
957 | to compare with. */ | |
85265413 NR |
958 | if (initial) |
959 | var->print_value = value_get_print_value (value, var->format); | |
960 | else if (changeable) | |
acd65feb VP |
961 | { |
962 | /* If the value of the varobj was changed by -var-set-value, then the | |
963 | value in the varobj and in the target is the same. However, that value | |
964 | is different from the value that the varobj had after the previous | |
57e66780 | 965 | -var-update. So need to the varobj as changed. */ |
acd65feb | 966 | if (var->updated) |
57e66780 DJ |
967 | { |
968 | xfree (var->print_value); | |
969 | var->print_value = value_get_print_value (value, var->format); | |
970 | changed = 1; | |
971 | } | |
acd65feb VP |
972 | else |
973 | { | |
974 | /* Try to compare the values. That requires that both | |
975 | values are non-lazy. */ | |
976 | ||
977 | /* Quick comparison of NULL values. */ | |
978 | if (var->value == NULL && value == NULL) | |
979 | /* Equal. */ | |
980 | ; | |
981 | else if (var->value == NULL || value == NULL) | |
57e66780 DJ |
982 | { |
983 | xfree (var->print_value); | |
984 | var->print_value = value_get_print_value (value, var->format); | |
985 | changed = 1; | |
986 | } | |
acd65feb VP |
987 | else |
988 | { | |
85265413 | 989 | char *print_value; |
acd65feb VP |
990 | gdb_assert (!value_lazy (var->value)); |
991 | gdb_assert (!value_lazy (value)); | |
85265413 NR |
992 | print_value = value_get_print_value (value, var->format); |
993 | ||
57e66780 | 994 | gdb_assert (var->print_value != NULL && print_value != NULL); |
85265413 NR |
995 | if (strcmp (var->print_value, print_value) != 0) |
996 | { | |
997 | xfree (var->print_value); | |
998 | var->print_value = print_value; | |
999 | changed = 1; | |
1000 | } | |
1001 | else | |
1002 | xfree (print_value); | |
acd65feb VP |
1003 | } |
1004 | } | |
1005 | } | |
85265413 | 1006 | |
acd65feb VP |
1007 | /* We must always keep the new value, since children depend on it. */ |
1008 | if (var->value != NULL) | |
1009 | value_free (var->value); | |
1010 | var->value = value; | |
1011 | var->updated = 0; | |
85265413 | 1012 | |
b26ed50d | 1013 | gdb_assert (!var->value || value_type (var->value)); |
acd65feb VP |
1014 | |
1015 | return changed; | |
1016 | } | |
acd65feb | 1017 | |
8b93c638 JM |
1018 | /* Update the values for a variable and its children. This is a |
1019 | two-pronged attack. First, re-parse the value for the root's | |
1020 | expression to see if it's changed. Then go all the way | |
1021 | through its children, reconstructing them and noting if they've | |
1022 | changed. | |
73a93a32 JI |
1023 | Return value: |
1024 | -1 if there was an error updating the varobj | |
1025 | -2 if the type changed | |
1026 | Otherwise it is the number of children + parent changed | |
8b93c638 | 1027 | |
705da579 KS |
1028 | Only root variables can be updated... |
1029 | ||
1030 | NOTE: This function may delete the caller's varobj. If it | |
1031 | returns -2, then it has done this and VARP will be modified | |
1032 | to point to the new varobj. */ | |
8b93c638 JM |
1033 | |
1034 | int | |
705da579 | 1035 | varobj_update (struct varobj **varp, struct varobj ***changelist) |
8b93c638 JM |
1036 | { |
1037 | int changed = 0; | |
a6c442d8 | 1038 | int error = 0; |
73a93a32 | 1039 | int type_changed; |
8b93c638 JM |
1040 | int i; |
1041 | int vleft; | |
8b93c638 JM |
1042 | struct varobj *v; |
1043 | struct varobj **cv; | |
2c67cb8b | 1044 | struct varobj **templist = NULL; |
30b28db1 | 1045 | struct value *new; |
28335dcc VP |
1046 | VEC (varobj_p) *stack = NULL; |
1047 | VEC (varobj_p) *result = NULL; | |
e64d9b3d MH |
1048 | struct frame_id old_fid; |
1049 | struct frame_info *fi; | |
8b93c638 JM |
1050 | |
1051 | /* sanity check: have we been passed a pointer? */ | |
1052 | if (changelist == NULL) | |
1053 | return -1; | |
1054 | ||
1055 | /* Only root variables can be updated... */ | |
b2c2bd75 | 1056 | if (!is_root_p (*varp)) |
8b93c638 JM |
1057 | /* Not a root var */ |
1058 | return -1; | |
1059 | ||
1060 | /* Save the selected stack frame, since we will need to change it | |
1061 | in order to evaluate expressions. */ | |
7a424e99 | 1062 | old_fid = get_frame_id (deprecated_selected_frame); |
8b93c638 JM |
1063 | |
1064 | /* Update the root variable. value_of_root can return NULL | |
1065 | if the variable is no longer around, i.e. we stepped out of | |
73a93a32 JI |
1066 | the frame in which a local existed. We are letting the |
1067 | value_of_root variable dispose of the varobj if the type | |
1068 | has changed. */ | |
1069 | type_changed = 1; | |
705da579 | 1070 | new = value_of_root (varp, &type_changed); |
0d2bd018 NR |
1071 | |
1072 | /* Restore selected frame */ | |
1073 | fi = frame_find_by_id (old_fid); | |
1074 | if (fi) | |
1075 | select_frame (fi); | |
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) | |
28335dcc | 1080 | VEC_safe_push (varobj_p, result, *varp); |
acd65feb VP |
1081 | |
1082 | if (install_new_value ((*varp), new, type_changed)) | |
ae093f96 | 1083 | { |
acd65feb VP |
1084 | /* If type_changed is 1, install_new_value will never return |
1085 | non-zero, so we'll never report the same variable twice. */ | |
1086 | gdb_assert (!type_changed); | |
28335dcc | 1087 | VEC_safe_push (varobj_p, result, *varp); |
8b93c638 | 1088 | } |
8b93c638 | 1089 | |
b20d8971 VP |
1090 | if (new == NULL) |
1091 | { | |
1092 | /* This means the varobj itself is out of scope. | |
1093 | Report it. */ | |
1094 | VEC_free (varobj_p, result); | |
1095 | return -1; | |
1096 | } | |
1097 | ||
28335dcc | 1098 | VEC_safe_push (varobj_p, stack, *varp); |
8b93c638 JM |
1099 | |
1100 | /* Walk through the children, reconstructing them all. */ | |
28335dcc | 1101 | while (!VEC_empty (varobj_p, stack)) |
8b93c638 | 1102 | { |
28335dcc VP |
1103 | v = VEC_pop (varobj_p, stack); |
1104 | ||
1105 | /* Push any children. Use reverse order so that the first | |
1106 | child is popped from the work stack first, and so | |
1107 | will be added to result first. This does not | |
1108 | affect correctness, just "nicer". */ | |
1109 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) | |
8b93c638 | 1110 | { |
28335dcc VP |
1111 | varobj_p c = VEC_index (varobj_p, v->children, i); |
1112 | /* Child may be NULL if explicitly deleted by -var-delete. */ | |
1113 | if (c != NULL) | |
1114 | VEC_safe_push (varobj_p, stack, c); | |
8b93c638 JM |
1115 | } |
1116 | ||
28335dcc VP |
1117 | /* Update this variable, unless it's a root, which is already |
1118 | updated. */ | |
1119 | if (v != *varp) | |
1120 | { | |
1121 | new = value_of_child (v->parent, v->index); | |
1122 | if (install_new_value (v, new, 0 /* type not changed */)) | |
1123 | { | |
1124 | /* Note that it's changed */ | |
1125 | VEC_safe_push (varobj_p, result, v); | |
1126 | v->updated = 0; | |
1127 | } | |
8b93c638 | 1128 | } |
8b93c638 JM |
1129 | } |
1130 | ||
1131 | /* Alloc (changed + 1) list entries */ | |
28335dcc | 1132 | changed = VEC_length (varobj_p, result); |
8b93c638 | 1133 | *changelist = xmalloc ((changed + 1) * sizeof (struct varobj *)); |
28335dcc | 1134 | cv = *changelist; |
8b93c638 | 1135 | |
28335dcc | 1136 | for (i = 0; i < changed; ++i) |
8b93c638 | 1137 | { |
28335dcc VP |
1138 | *cv = VEC_index (varobj_p, result, i); |
1139 | gdb_assert (*cv != NULL); | |
1140 | ++cv; | |
8b93c638 | 1141 | } |
28335dcc | 1142 | *cv = 0; |
8b93c638 | 1143 | |
73a93a32 JI |
1144 | if (type_changed) |
1145 | return -2; | |
1146 | else | |
1147 | return changed; | |
8b93c638 JM |
1148 | } |
1149 | \f | |
1150 | ||
1151 | /* Helper functions */ | |
1152 | ||
1153 | /* | |
1154 | * Variable object construction/destruction | |
1155 | */ | |
1156 | ||
1157 | static int | |
fba45db2 KB |
1158 | delete_variable (struct cpstack **resultp, struct varobj *var, |
1159 | int only_children_p) | |
8b93c638 JM |
1160 | { |
1161 | int delcount = 0; | |
1162 | ||
1163 | delete_variable_1 (resultp, &delcount, var, | |
1164 | only_children_p, 1 /* remove_from_parent_p */ ); | |
1165 | ||
1166 | return delcount; | |
1167 | } | |
1168 | ||
1169 | /* Delete the variable object VAR and its children */ | |
1170 | /* IMPORTANT NOTE: If we delete a variable which is a child | |
1171 | and the parent is not removed we dump core. It must be always | |
1172 | initially called with remove_from_parent_p set */ | |
1173 | static void | |
72330bd6 AC |
1174 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
1175 | struct varobj *var, int only_children_p, | |
1176 | int remove_from_parent_p) | |
8b93c638 | 1177 | { |
28335dcc | 1178 | int i; |
8b93c638 JM |
1179 | |
1180 | /* Delete any children of this variable, too. */ | |
28335dcc VP |
1181 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
1182 | { | |
1183 | varobj_p child = VEC_index (varobj_p, var->children, i); | |
8b93c638 | 1184 | if (!remove_from_parent_p) |
28335dcc VP |
1185 | child->parent = NULL; |
1186 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); | |
8b93c638 | 1187 | } |
28335dcc | 1188 | VEC_free (varobj_p, var->children); |
8b93c638 JM |
1189 | |
1190 | /* if we were called to delete only the children we are done here */ | |
1191 | if (only_children_p) | |
1192 | return; | |
1193 | ||
1194 | /* Otherwise, add it to the list of deleted ones and proceed to do so */ | |
73a93a32 JI |
1195 | /* If the name is null, this is a temporary variable, that has not |
1196 | yet been installed, don't report it, it belongs to the caller... */ | |
1197 | if (var->obj_name != NULL) | |
8b93c638 | 1198 | { |
5b616ba1 | 1199 | cppush (resultp, xstrdup (var->obj_name)); |
8b93c638 JM |
1200 | *delcountp = *delcountp + 1; |
1201 | } | |
1202 | ||
1203 | /* If this variable has a parent, remove it from its parent's list */ | |
1204 | /* OPTIMIZATION: if the parent of this variable is also being deleted, | |
1205 | (as indicated by remove_from_parent_p) we don't bother doing an | |
1206 | expensive list search to find the element to remove when we are | |
1207 | discarding the list afterwards */ | |
72330bd6 | 1208 | if ((remove_from_parent_p) && (var->parent != NULL)) |
8b93c638 | 1209 | { |
28335dcc | 1210 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
8b93c638 | 1211 | } |
72330bd6 | 1212 | |
73a93a32 JI |
1213 | if (var->obj_name != NULL) |
1214 | uninstall_variable (var); | |
8b93c638 JM |
1215 | |
1216 | /* Free memory associated with this variable */ | |
1217 | free_variable (var); | |
1218 | } | |
1219 | ||
1220 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ | |
1221 | static int | |
fba45db2 | 1222 | install_variable (struct varobj *var) |
8b93c638 JM |
1223 | { |
1224 | struct vlist *cv; | |
1225 | struct vlist *newvl; | |
1226 | const char *chp; | |
1227 | unsigned int index = 0; | |
1228 | unsigned int i = 1; | |
1229 | ||
1230 | for (chp = var->obj_name; *chp; chp++) | |
1231 | { | |
1232 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1233 | } | |
1234 | ||
1235 | cv = *(varobj_table + index); | |
1236 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1237 | cv = cv->next; | |
1238 | ||
1239 | if (cv != NULL) | |
8a3fe4f8 | 1240 | error (_("Duplicate variable object name")); |
8b93c638 JM |
1241 | |
1242 | /* Add varobj to hash table */ | |
1243 | newvl = xmalloc (sizeof (struct vlist)); | |
1244 | newvl->next = *(varobj_table + index); | |
1245 | newvl->var = var; | |
1246 | *(varobj_table + index) = newvl; | |
1247 | ||
1248 | /* If root, add varobj to root list */ | |
b2c2bd75 | 1249 | if (is_root_p (var)) |
8b93c638 JM |
1250 | { |
1251 | /* Add to list of root variables */ | |
1252 | if (rootlist == NULL) | |
1253 | var->root->next = NULL; | |
1254 | else | |
1255 | var->root->next = rootlist; | |
1256 | rootlist = var->root; | |
1257 | rootcount++; | |
1258 | } | |
1259 | ||
1260 | return 1; /* OK */ | |
1261 | } | |
1262 | ||
1263 | /* Unistall the object VAR. */ | |
1264 | static void | |
fba45db2 | 1265 | uninstall_variable (struct varobj *var) |
8b93c638 JM |
1266 | { |
1267 | struct vlist *cv; | |
1268 | struct vlist *prev; | |
1269 | struct varobj_root *cr; | |
1270 | struct varobj_root *prer; | |
1271 | const char *chp; | |
1272 | unsigned int index = 0; | |
1273 | unsigned int i = 1; | |
1274 | ||
1275 | /* Remove varobj from hash table */ | |
1276 | for (chp = var->obj_name; *chp; chp++) | |
1277 | { | |
1278 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; | |
1279 | } | |
1280 | ||
1281 | cv = *(varobj_table + index); | |
1282 | prev = NULL; | |
1283 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) | |
1284 | { | |
1285 | prev = cv; | |
1286 | cv = cv->next; | |
1287 | } | |
1288 | ||
1289 | if (varobjdebug) | |
1290 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); | |
1291 | ||
1292 | if (cv == NULL) | |
1293 | { | |
72330bd6 AC |
1294 | warning |
1295 | ("Assertion failed: Could not find variable object \"%s\" to delete", | |
1296 | var->obj_name); | |
8b93c638 JM |
1297 | return; |
1298 | } | |
1299 | ||
1300 | if (prev == NULL) | |
1301 | *(varobj_table + index) = cv->next; | |
1302 | else | |
1303 | prev->next = cv->next; | |
1304 | ||
b8c9b27d | 1305 | xfree (cv); |
8b93c638 JM |
1306 | |
1307 | /* If root, remove varobj from root list */ | |
b2c2bd75 | 1308 | if (is_root_p (var)) |
8b93c638 JM |
1309 | { |
1310 | /* Remove from list of root variables */ | |
1311 | if (rootlist == var->root) | |
1312 | rootlist = var->root->next; | |
1313 | else | |
1314 | { | |
1315 | prer = NULL; | |
1316 | cr = rootlist; | |
1317 | while ((cr != NULL) && (cr->rootvar != var)) | |
1318 | { | |
1319 | prer = cr; | |
1320 | cr = cr->next; | |
1321 | } | |
1322 | if (cr == NULL) | |
1323 | { | |
72330bd6 AC |
1324 | warning |
1325 | ("Assertion failed: Could not find varobj \"%s\" in root list", | |
1326 | var->obj_name); | |
8b93c638 JM |
1327 | return; |
1328 | } | |
1329 | if (prer == NULL) | |
1330 | rootlist = NULL; | |
1331 | else | |
1332 | prer->next = cr->next; | |
1333 | } | |
1334 | rootcount--; | |
1335 | } | |
1336 | ||
1337 | } | |
1338 | ||
8b93c638 JM |
1339 | /* Create and install a child of the parent of the given name */ |
1340 | static struct varobj * | |
fba45db2 | 1341 | create_child (struct varobj *parent, int index, char *name) |
8b93c638 JM |
1342 | { |
1343 | struct varobj *child; | |
1344 | char *childs_name; | |
acd65feb | 1345 | struct value *value; |
8b93c638 JM |
1346 | |
1347 | child = new_variable (); | |
1348 | ||
1349 | /* name is allocated by name_of_child */ | |
1350 | child->name = name; | |
1351 | child->index = index; | |
acd65feb | 1352 | value = value_of_child (parent, index); |
8b93c638 JM |
1353 | child->parent = parent; |
1354 | child->root = parent->root; | |
b435e160 | 1355 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
8b93c638 JM |
1356 | child->obj_name = childs_name; |
1357 | install_variable (child); | |
1358 | ||
acd65feb VP |
1359 | /* Compute the type of the child. Must do this before |
1360 | calling install_new_value. */ | |
1361 | if (value != NULL) | |
1362 | /* If the child had no evaluation errors, var->value | |
1363 | will be non-NULL and contain a valid type. */ | |
1364 | child->type = value_type (value); | |
1365 | else | |
1366 | /* Otherwise, we must compute the type. */ | |
1367 | child->type = (*child->root->lang->type_of_child) (child->parent, | |
1368 | child->index); | |
1369 | install_new_value (child, value, 1); | |
1370 | ||
8b93c638 JM |
1371 | return child; |
1372 | } | |
8b93c638 JM |
1373 | \f |
1374 | ||
1375 | /* | |
1376 | * Miscellaneous utility functions. | |
1377 | */ | |
1378 | ||
1379 | /* Allocate memory and initialize a new variable */ | |
1380 | static struct varobj * | |
1381 | new_variable (void) | |
1382 | { | |
1383 | struct varobj *var; | |
1384 | ||
1385 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); | |
1386 | var->name = NULL; | |
1387 | var->obj_name = NULL; | |
1388 | var->index = -1; | |
1389 | var->type = NULL; | |
1390 | var->value = NULL; | |
8b93c638 JM |
1391 | var->num_children = -1; |
1392 | var->parent = NULL; | |
1393 | var->children = NULL; | |
1394 | var->format = 0; | |
1395 | var->root = NULL; | |
fb9b6b35 | 1396 | var->updated = 0; |
85265413 | 1397 | var->print_value = NULL; |
8b93c638 JM |
1398 | |
1399 | return var; | |
1400 | } | |
1401 | ||
1402 | /* Allocate memory and initialize a new root variable */ | |
1403 | static struct varobj * | |
1404 | new_root_variable (void) | |
1405 | { | |
1406 | struct varobj *var = new_variable (); | |
1407 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root));; | |
1408 | var->root->lang = NULL; | |
1409 | var->root->exp = NULL; | |
1410 | var->root->valid_block = NULL; | |
7a424e99 | 1411 | var->root->frame = null_frame_id; |
73a93a32 | 1412 | var->root->use_selected_frame = 0; |
8b93c638 JM |
1413 | var->root->rootvar = NULL; |
1414 | ||
1415 | return var; | |
1416 | } | |
1417 | ||
1418 | /* Free any allocated memory associated with VAR. */ | |
1419 | static void | |
fba45db2 | 1420 | free_variable (struct varobj *var) |
8b93c638 JM |
1421 | { |
1422 | /* Free the expression if this is a root variable. */ | |
b2c2bd75 | 1423 | if (is_root_p (var)) |
8b93c638 | 1424 | { |
96c1eda2 | 1425 | free_current_contents (&var->root->exp); |
8038e1e2 | 1426 | xfree (var->root); |
8b93c638 JM |
1427 | } |
1428 | ||
8038e1e2 AC |
1429 | xfree (var->name); |
1430 | xfree (var->obj_name); | |
85265413 | 1431 | xfree (var->print_value); |
8038e1e2 | 1432 | xfree (var); |
8b93c638 JM |
1433 | } |
1434 | ||
74b7792f AC |
1435 | static void |
1436 | do_free_variable_cleanup (void *var) | |
1437 | { | |
1438 | free_variable (var); | |
1439 | } | |
1440 | ||
1441 | static struct cleanup * | |
1442 | make_cleanup_free_variable (struct varobj *var) | |
1443 | { | |
1444 | return make_cleanup (do_free_variable_cleanup, var); | |
1445 | } | |
1446 | ||
6766a268 DJ |
1447 | /* This returns the type of the variable. It also skips past typedefs |
1448 | to return the real type of the variable. | |
94b66fa7 KS |
1449 | |
1450 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1451 | except within get_target_type and get_type. */ | |
8b93c638 | 1452 | static struct type * |
fba45db2 | 1453 | get_type (struct varobj *var) |
8b93c638 JM |
1454 | { |
1455 | struct type *type; | |
1456 | type = var->type; | |
1457 | ||
6766a268 DJ |
1458 | if (type != NULL) |
1459 | type = check_typedef (type); | |
8b93c638 JM |
1460 | |
1461 | return type; | |
1462 | } | |
1463 | ||
6e2a9270 VP |
1464 | /* Return the type of the value that's stored in VAR, |
1465 | or that would have being stored there if the | |
1466 | value were accessible. | |
1467 | ||
1468 | This differs from VAR->type in that VAR->type is always | |
1469 | the true type of the expession in the source language. | |
1470 | The return value of this function is the type we're | |
1471 | actually storing in varobj, and using for displaying | |
1472 | the values and for comparing previous and new values. | |
1473 | ||
1474 | For example, top-level references are always stripped. */ | |
1475 | static struct type * | |
1476 | get_value_type (struct varobj *var) | |
1477 | { | |
1478 | struct type *type; | |
1479 | ||
1480 | if (var->value) | |
1481 | type = value_type (var->value); | |
1482 | else | |
1483 | type = var->type; | |
1484 | ||
1485 | type = check_typedef (type); | |
1486 | ||
1487 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1488 | type = get_target_type (type); | |
1489 | ||
1490 | type = check_typedef (type); | |
1491 | ||
1492 | return type; | |
1493 | } | |
1494 | ||
0f0ac1f5 NR |
1495 | /* This returns the type of the variable, dereferencing references, pointers |
1496 | and references to pointers, too. */ | |
8b93c638 | 1497 | static struct type * |
fba45db2 | 1498 | get_type_deref (struct varobj *var) |
8b93c638 JM |
1499 | { |
1500 | struct type *type; | |
1501 | ||
1502 | type = get_type (var); | |
1503 | ||
0f0ac1f5 NR |
1504 | if (type) |
1505 | { | |
1506 | if (TYPE_CODE (type) == TYPE_CODE_REF) | |
1507 | type = get_target_type (type); | |
1508 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
1509 | type = get_target_type (type); | |
1510 | } | |
8b93c638 JM |
1511 | |
1512 | return type; | |
1513 | } | |
1514 | ||
1515 | /* This returns the target type (or NULL) of TYPE, also skipping | |
94b66fa7 KS |
1516 | past typedefs, just like get_type (). |
1517 | ||
1518 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file | |
1519 | except within get_target_type and get_type. */ | |
8b93c638 | 1520 | static struct type * |
fba45db2 | 1521 | get_target_type (struct type *type) |
8b93c638 JM |
1522 | { |
1523 | if (type != NULL) | |
1524 | { | |
1525 | type = TYPE_TARGET_TYPE (type); | |
6766a268 DJ |
1526 | if (type != NULL) |
1527 | type = check_typedef (type); | |
8b93c638 JM |
1528 | } |
1529 | ||
1530 | return type; | |
1531 | } | |
1532 | ||
1533 | /* What is the default display for this variable? We assume that | |
1534 | everything is "natural". Any exceptions? */ | |
1535 | static enum varobj_display_formats | |
fba45db2 | 1536 | variable_default_display (struct varobj *var) |
8b93c638 JM |
1537 | { |
1538 | return FORMAT_NATURAL; | |
1539 | } | |
1540 | ||
8b93c638 JM |
1541 | /* FIXME: The following should be generic for any pointer */ |
1542 | static void | |
fba45db2 | 1543 | cppush (struct cpstack **pstack, char *name) |
8b93c638 JM |
1544 | { |
1545 | struct cpstack *s; | |
1546 | ||
1547 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); | |
1548 | s->name = name; | |
1549 | s->next = *pstack; | |
1550 | *pstack = s; | |
1551 | } | |
1552 | ||
1553 | /* FIXME: The following should be generic for any pointer */ | |
1554 | static char * | |
fba45db2 | 1555 | cppop (struct cpstack **pstack) |
8b93c638 JM |
1556 | { |
1557 | struct cpstack *s; | |
1558 | char *v; | |
1559 | ||
1560 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) | |
1561 | return NULL; | |
1562 | ||
1563 | s = *pstack; | |
1564 | v = s->name; | |
1565 | *pstack = (*pstack)->next; | |
b8c9b27d | 1566 | xfree (s); |
8b93c638 JM |
1567 | |
1568 | return v; | |
1569 | } | |
1570 | \f | |
1571 | /* | |
1572 | * Language-dependencies | |
1573 | */ | |
1574 | ||
1575 | /* Common entry points */ | |
1576 | ||
1577 | /* Get the language of variable VAR. */ | |
1578 | static enum varobj_languages | |
fba45db2 | 1579 | variable_language (struct varobj *var) |
8b93c638 JM |
1580 | { |
1581 | enum varobj_languages lang; | |
1582 | ||
1583 | switch (var->root->exp->language_defn->la_language) | |
1584 | { | |
1585 | default: | |
1586 | case language_c: | |
1587 | lang = vlang_c; | |
1588 | break; | |
1589 | case language_cplus: | |
1590 | lang = vlang_cplus; | |
1591 | break; | |
1592 | case language_java: | |
1593 | lang = vlang_java; | |
1594 | break; | |
1595 | } | |
1596 | ||
1597 | return lang; | |
1598 | } | |
1599 | ||
1600 | /* Return the number of children for a given variable. | |
1601 | The result of this function is defined by the language | |
1602 | implementation. The number of children returned by this function | |
1603 | is the number of children that the user will see in the variable | |
1604 | display. */ | |
1605 | static int | |
fba45db2 | 1606 | number_of_children (struct varobj *var) |
8b93c638 JM |
1607 | { |
1608 | return (*var->root->lang->number_of_children) (var);; | |
1609 | } | |
1610 | ||
1611 | /* What is the expression for the root varobj VAR? Returns a malloc'd string. */ | |
1612 | static char * | |
fba45db2 | 1613 | name_of_variable (struct varobj *var) |
8b93c638 JM |
1614 | { |
1615 | return (*var->root->lang->name_of_variable) (var); | |
1616 | } | |
1617 | ||
1618 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd string. */ | |
1619 | static char * | |
fba45db2 | 1620 | name_of_child (struct varobj *var, int index) |
8b93c638 JM |
1621 | { |
1622 | return (*var->root->lang->name_of_child) (var, index); | |
1623 | } | |
1624 | ||
30b28db1 | 1625 | /* What is the ``struct value *'' of the root variable VAR? |
73a93a32 JI |
1626 | TYPE_CHANGED controls what to do if the type of a |
1627 | use_selected_frame = 1 variable changes. On input, | |
1628 | TYPE_CHANGED = 1 means discard the old varobj, and replace | |
1629 | it with this one. TYPE_CHANGED = 0 means leave it around. | |
1630 | NB: In both cases, var_handle will point to the new varobj, | |
1631 | so if you use TYPE_CHANGED = 0, you will have to stash the | |
1632 | old varobj pointer away somewhere before calling this. | |
1633 | On return, TYPE_CHANGED will be 1 if the type has changed, and | |
1634 | 0 otherwise. */ | |
30b28db1 | 1635 | static struct value * |
fba45db2 | 1636 | value_of_root (struct varobj **var_handle, int *type_changed) |
8b93c638 | 1637 | { |
73a93a32 JI |
1638 | struct varobj *var; |
1639 | ||
1640 | if (var_handle == NULL) | |
1641 | return NULL; | |
1642 | ||
1643 | var = *var_handle; | |
1644 | ||
1645 | /* This should really be an exception, since this should | |
1646 | only get called with a root variable. */ | |
1647 | ||
b2c2bd75 | 1648 | if (!is_root_p (var)) |
73a93a32 JI |
1649 | return NULL; |
1650 | ||
1651 | if (var->root->use_selected_frame) | |
1652 | { | |
1653 | struct varobj *tmp_var; | |
1654 | char *old_type, *new_type; | |
1655 | old_type = varobj_get_type (var); | |
1656 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, | |
1657 | USE_SELECTED_FRAME); | |
1658 | if (tmp_var == NULL) | |
1659 | { | |
1660 | return NULL; | |
1661 | } | |
1662 | new_type = varobj_get_type (tmp_var); | |
72330bd6 | 1663 | if (strcmp (old_type, new_type) == 0) |
73a93a32 JI |
1664 | { |
1665 | varobj_delete (tmp_var, NULL, 0); | |
1666 | *type_changed = 0; | |
1667 | } | |
1668 | else | |
1669 | { | |
1670 | if (*type_changed) | |
1671 | { | |
72330bd6 | 1672 | tmp_var->obj_name = |
73a93a32 | 1673 | savestring (var->obj_name, strlen (var->obj_name)); |
f7635dd9 | 1674 | varobj_delete (var, NULL, 0); |
73a93a32 JI |
1675 | } |
1676 | else | |
1677 | { | |
72330bd6 | 1678 | tmp_var->obj_name = varobj_gen_name (); |
73a93a32 JI |
1679 | } |
1680 | install_variable (tmp_var); | |
1681 | *var_handle = tmp_var; | |
705da579 | 1682 | var = *var_handle; |
73a93a32 JI |
1683 | *type_changed = 1; |
1684 | } | |
1685 | } | |
1686 | else | |
1687 | { | |
1688 | *type_changed = 0; | |
1689 | } | |
1690 | ||
1691 | return (*var->root->lang->value_of_root) (var_handle); | |
8b93c638 JM |
1692 | } |
1693 | ||
30b28db1 AC |
1694 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
1695 | static struct value * | |
fba45db2 | 1696 | value_of_child (struct varobj *parent, int index) |
8b93c638 | 1697 | { |
30b28db1 | 1698 | struct value *value; |
8b93c638 JM |
1699 | |
1700 | value = (*parent->root->lang->value_of_child) (parent, index); | |
1701 | ||
8b93c638 JM |
1702 | return value; |
1703 | } | |
1704 | ||
8b93c638 JM |
1705 | /* Is this variable editable? Use the variable's type to make |
1706 | this determination. */ | |
1707 | static int | |
fba45db2 | 1708 | variable_editable (struct varobj *var) |
8b93c638 JM |
1709 | { |
1710 | return (*var->root->lang->variable_editable) (var); | |
1711 | } | |
1712 | ||
1713 | /* GDB already has a command called "value_of_variable". Sigh. */ | |
1714 | static char * | |
fba45db2 | 1715 | my_value_of_variable (struct varobj *var) |
8b93c638 JM |
1716 | { |
1717 | return (*var->root->lang->value_of_variable) (var); | |
1718 | } | |
1719 | ||
85265413 NR |
1720 | static char * |
1721 | value_get_print_value (struct value *value, enum varobj_display_formats format) | |
1722 | { | |
1723 | long dummy; | |
57e66780 DJ |
1724 | struct ui_file *stb; |
1725 | struct cleanup *old_chain; | |
85265413 | 1726 | char *thevalue; |
57e66780 DJ |
1727 | |
1728 | if (value == NULL) | |
1729 | return NULL; | |
1730 | ||
1731 | stb = mem_fileopen (); | |
1732 | old_chain = make_cleanup_ui_file_delete (stb); | |
1733 | ||
85265413 NR |
1734 | common_val_print (value, stb, format_code[(int) format], 1, 0, 0); |
1735 | thevalue = ui_file_xstrdup (stb, &dummy); | |
57e66780 | 1736 | |
85265413 NR |
1737 | do_cleanups (old_chain); |
1738 | return thevalue; | |
1739 | } | |
1740 | ||
acd65feb VP |
1741 | /* Return non-zero if changes in value of VAR |
1742 | must be detected and reported by -var-update. | |
1743 | Return zero is -var-update should never report | |
1744 | changes of such values. This makes sense for structures | |
1745 | (since the changes in children values will be reported separately), | |
1746 | or for artifical objects (like 'public' pseudo-field in C++). | |
1747 | ||
1748 | Return value of 0 means that gdb need not call value_fetch_lazy | |
1749 | for the value of this variable object. */ | |
8b93c638 | 1750 | static int |
b2c2bd75 | 1751 | varobj_value_is_changeable_p (struct varobj *var) |
8b93c638 JM |
1752 | { |
1753 | int r; | |
1754 | struct type *type; | |
1755 | ||
1756 | if (CPLUS_FAKE_CHILD (var)) | |
1757 | return 0; | |
1758 | ||
6e2a9270 | 1759 | type = get_value_type (var); |
8b93c638 JM |
1760 | |
1761 | switch (TYPE_CODE (type)) | |
1762 | { | |
72330bd6 AC |
1763 | case TYPE_CODE_STRUCT: |
1764 | case TYPE_CODE_UNION: | |
1765 | case TYPE_CODE_ARRAY: | |
1766 | r = 0; | |
1767 | break; | |
8b93c638 | 1768 | |
72330bd6 AC |
1769 | default: |
1770 | r = 1; | |
8b93c638 JM |
1771 | } |
1772 | ||
1773 | return r; | |
1774 | } | |
1775 | ||
1776 | /* C */ | |
1777 | static int | |
fba45db2 | 1778 | c_number_of_children (struct varobj *var) |
8b93c638 JM |
1779 | { |
1780 | struct type *type; | |
1781 | struct type *target; | |
1782 | int children; | |
1783 | ||
1784 | type = get_type (var); | |
1785 | target = get_target_type (type); | |
1786 | children = 0; | |
1787 | ||
1788 | switch (TYPE_CODE (type)) | |
1789 | { | |
1790 | case TYPE_CODE_ARRAY: | |
1791 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 | |
72330bd6 | 1792 | && TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED) |
8b93c638 JM |
1793 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
1794 | else | |
74a44383 DJ |
1795 | /* If we don't know how many elements there are, don't display |
1796 | any. */ | |
1797 | children = 0; | |
8b93c638 JM |
1798 | break; |
1799 | ||
1800 | case TYPE_CODE_STRUCT: | |
1801 | case TYPE_CODE_UNION: | |
1802 | children = TYPE_NFIELDS (type); | |
1803 | break; | |
1804 | ||
1805 | case TYPE_CODE_PTR: | |
0f0ac1f5 | 1806 | /* This is where things get complicated. All pointers have one child. |
8b93c638 | 1807 | Except, of course, for struct and union ptr, which we automagically |
0f0ac1f5 | 1808 | dereference for the user, and function ptrs which have no children. |
0755e6c1 FN |
1809 | We also don't dereference void* as we don't know what to show. |
1810 | We can show char* so we allow it to be dereferenced. If you decide | |
1811 | to test for it, please mind that a little magic is necessary to | |
1812 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and | |
1813 | TYPE_NAME == "char" */ | |
1814 | ||
8b93c638 JM |
1815 | switch (TYPE_CODE (target)) |
1816 | { | |
1817 | case TYPE_CODE_STRUCT: | |
1818 | case TYPE_CODE_UNION: | |
1819 | children = TYPE_NFIELDS (target); | |
1820 | break; | |
1821 | ||
1822 | case TYPE_CODE_FUNC: | |
0755e6c1 | 1823 | case TYPE_CODE_VOID: |
8b93c638 JM |
1824 | children = 0; |
1825 | break; | |
1826 | ||
1827 | default: | |
0755e6c1 | 1828 | children = 1; |
8b93c638 JM |
1829 | } |
1830 | break; | |
1831 | ||
1832 | default: | |
1833 | /* Other types have no children */ | |
1834 | break; | |
1835 | } | |
1836 | ||
1837 | return children; | |
1838 | } | |
1839 | ||
1840 | static char * | |
fba45db2 | 1841 | c_name_of_variable (struct varobj *parent) |
8b93c638 JM |
1842 | { |
1843 | return savestring (parent->name, strlen (parent->name)); | |
1844 | } | |
1845 | ||
bbec2603 VP |
1846 | /* Return the value of element TYPE_INDEX of a structure |
1847 | value VALUE. VALUE's type should be a structure, | |
1848 | or union, or a typedef to struct/union. | |
1849 | ||
1850 | Returns NULL if getting the value fails. Never throws. */ | |
1851 | static struct value * | |
1852 | value_struct_element_index (struct value *value, int type_index) | |
8b93c638 | 1853 | { |
bbec2603 VP |
1854 | struct value *result = NULL; |
1855 | volatile struct gdb_exception e; | |
8b93c638 | 1856 | |
bbec2603 VP |
1857 | struct type *type = value_type (value); |
1858 | type = check_typedef (type); | |
1859 | ||
1860 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT | |
1861 | || TYPE_CODE (type) == TYPE_CODE_UNION); | |
8b93c638 | 1862 | |
bbec2603 VP |
1863 | TRY_CATCH (e, RETURN_MASK_ERROR) |
1864 | { | |
1865 | if (TYPE_FIELD_STATIC (type, type_index)) | |
1866 | result = value_static_field (type, type_index); | |
1867 | else | |
1868 | result = value_primitive_field (value, 0, type_index, type); | |
1869 | } | |
1870 | if (e.reason < 0) | |
1871 | { | |
1872 | return NULL; | |
1873 | } | |
1874 | else | |
1875 | { | |
1876 | return result; | |
1877 | } | |
1878 | } | |
1879 | ||
1880 | /* Obtain the information about child INDEX of the variable | |
1881 | object PARENT. | |
1882 | If CNAME is not null, sets *CNAME to the name of the child relative | |
1883 | to the parent. | |
1884 | If CVALUE is not null, sets *CVALUE to the value of the child. | |
1885 | If CTYPE is not null, sets *CTYPE to the type of the child. | |
1886 | ||
1887 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding | |
1888 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE | |
1889 | to NULL. */ | |
1890 | static void | |
1891 | c_describe_child (struct varobj *parent, int index, | |
1892 | char **cname, struct value **cvalue, struct type **ctype) | |
1893 | { | |
1894 | struct value *value = parent->value; | |
1895 | struct type *type = get_type (parent); | |
1896 | ||
1897 | if (cname) | |
1898 | *cname = NULL; | |
1899 | if (cvalue) | |
1900 | *cvalue = NULL; | |
1901 | if (ctype) | |
1902 | *ctype = NULL; | |
1903 | ||
1904 | /* Pointers to structures are treated just like | |
1905 | structures when accessing children. */ | |
1906 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
1907 | { | |
1908 | struct type *target_type = get_target_type (type); | |
1909 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT | |
1910 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) | |
1911 | { | |
1912 | if (value) | |
1913 | gdb_value_ind (value, &value); | |
1914 | type = target_type; | |
1915 | } | |
1916 | } | |
1917 | ||
8b93c638 JM |
1918 | switch (TYPE_CODE (type)) |
1919 | { | |
1920 | case TYPE_CODE_ARRAY: | |
bbec2603 VP |
1921 | if (cname) |
1922 | *cname = xstrprintf ("%d", index | |
1923 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type))); | |
1924 | ||
1925 | if (cvalue && value) | |
1926 | { | |
1927 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); | |
1928 | struct value *indval = | |
1929 | value_from_longest (builtin_type_int, (LONGEST) real_index); | |
1930 | gdb_value_subscript (value, indval, cvalue); | |
1931 | } | |
1932 | ||
1933 | if (ctype) | |
1934 | *ctype = get_target_type (type); | |
1935 | ||
8b93c638 JM |
1936 | break; |
1937 | ||
1938 | case TYPE_CODE_STRUCT: | |
1939 | case TYPE_CODE_UNION: | |
bbec2603 VP |
1940 | if (cname) |
1941 | { | |
1942 | char *string = TYPE_FIELD_NAME (type, index); | |
1943 | *cname = savestring (string, strlen (string)); | |
1944 | } | |
1945 | ||
1946 | if (cvalue && value) | |
1947 | { | |
1948 | /* For C, varobj index is the same as type index. */ | |
1949 | *cvalue = value_struct_element_index (value, index); | |
1950 | } | |
1951 | ||
1952 | if (ctype) | |
1953 | *ctype = TYPE_FIELD_TYPE (type, index); | |
1954 | ||
8b93c638 JM |
1955 | break; |
1956 | ||
1957 | case TYPE_CODE_PTR: | |
bbec2603 VP |
1958 | if (cname) |
1959 | *cname = xstrprintf ("*%s", parent->name); | |
8b93c638 | 1960 | |
bbec2603 VP |
1961 | if (cvalue && value) |
1962 | gdb_value_ind (value, cvalue); | |
1963 | ||
1964 | if (ctype) | |
1965 | *ctype = get_target_type (type); | |
1966 | ||
8b93c638 JM |
1967 | break; |
1968 | ||
1969 | default: | |
1970 | /* This should not happen */ | |
bbec2603 VP |
1971 | if (cname) |
1972 | *cname = xstrdup ("???"); | |
1973 | /* Don't set value and type, we don't know then. */ | |
8b93c638 | 1974 | } |
bbec2603 | 1975 | } |
8b93c638 | 1976 | |
bbec2603 VP |
1977 | static char * |
1978 | c_name_of_child (struct varobj *parent, int index) | |
1979 | { | |
1980 | char *name; | |
1981 | c_describe_child (parent, index, &name, NULL, NULL); | |
8b93c638 JM |
1982 | return name; |
1983 | } | |
1984 | ||
30b28db1 | 1985 | static struct value * |
fba45db2 | 1986 | c_value_of_root (struct varobj **var_handle) |
8b93c638 | 1987 | { |
5e572bb4 | 1988 | struct value *new_val = NULL; |
73a93a32 | 1989 | struct varobj *var = *var_handle; |
8b93c638 JM |
1990 | struct frame_info *fi; |
1991 | int within_scope; | |
1992 | ||
73a93a32 | 1993 | /* Only root variables can be updated... */ |
b2c2bd75 | 1994 | if (!is_root_p (var)) |
73a93a32 JI |
1995 | /* Not a root var */ |
1996 | return NULL; | |
1997 | ||
72330bd6 | 1998 | |
8b93c638 | 1999 | /* Determine whether the variable is still around. */ |
b20d8971 | 2000 | if (var->root->valid_block == NULL || var->root->use_selected_frame) |
8b93c638 JM |
2001 | within_scope = 1; |
2002 | else | |
2003 | { | |
e64d9b3d | 2004 | fi = frame_find_by_id (var->root->frame); |
8b93c638 JM |
2005 | within_scope = fi != NULL; |
2006 | /* FIXME: select_frame could fail */ | |
d2353924 NR |
2007 | if (fi) |
2008 | { | |
2009 | CORE_ADDR pc = get_frame_pc (fi); | |
2010 | if (pc < BLOCK_START (var->root->valid_block) || | |
2011 | pc >= BLOCK_END (var->root->valid_block)) | |
2012 | within_scope = 0; | |
2d43bda2 NR |
2013 | else |
2014 | select_frame (fi); | |
d2353924 | 2015 | } |
8b93c638 | 2016 | } |
72330bd6 | 2017 | |
8b93c638 JM |
2018 | if (within_scope) |
2019 | { | |
73a93a32 | 2020 | /* We need to catch errors here, because if evaluate |
72330bd6 AC |
2021 | expression fails we just want to make val->error = 1 and |
2022 | go on */ | |
8b93c638 JM |
2023 | if (gdb_evaluate_expression (var->root->exp, &new_val)) |
2024 | { | |
acd65feb | 2025 | release_value (new_val); |
8b93c638 | 2026 | } |
72330bd6 | 2027 | |
8b93c638 JM |
2028 | return new_val; |
2029 | } | |
2030 | ||
2031 | return NULL; | |
2032 | } | |
2033 | ||
30b28db1 | 2034 | static struct value * |
fba45db2 | 2035 | c_value_of_child (struct varobj *parent, int index) |
8b93c638 | 2036 | { |
bbec2603 VP |
2037 | struct value *value = NULL; |
2038 | c_describe_child (parent, index, NULL, &value, NULL); | |
8b93c638 JM |
2039 | if (value != NULL) |
2040 | release_value (value); | |
2041 | ||
2042 | return value; | |
2043 | } | |
2044 | ||
2045 | static struct type * | |
fba45db2 | 2046 | c_type_of_child (struct varobj *parent, int index) |
8b93c638 | 2047 | { |
bbec2603 VP |
2048 | struct type *type = NULL; |
2049 | c_describe_child (parent, index, NULL, NULL, &type); | |
8b93c638 JM |
2050 | return type; |
2051 | } | |
2052 | ||
2053 | static int | |
fba45db2 | 2054 | c_variable_editable (struct varobj *var) |
8b93c638 | 2055 | { |
6e2a9270 | 2056 | switch (TYPE_CODE (get_value_type (var))) |
8b93c638 JM |
2057 | { |
2058 | case TYPE_CODE_STRUCT: | |
2059 | case TYPE_CODE_UNION: | |
2060 | case TYPE_CODE_ARRAY: | |
2061 | case TYPE_CODE_FUNC: | |
8b93c638 JM |
2062 | case TYPE_CODE_METHOD: |
2063 | return 0; | |
2064 | break; | |
2065 | ||
2066 | default: | |
2067 | return 1; | |
2068 | break; | |
2069 | } | |
2070 | } | |
2071 | ||
2072 | static char * | |
fba45db2 | 2073 | c_value_of_variable (struct varobj *var) |
8b93c638 | 2074 | { |
14b3d9c9 JB |
2075 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
2076 | it will print out its children instead of "{...}". So we need to | |
2077 | catch that case explicitly. */ | |
2078 | struct type *type = get_type (var); | |
e64d9b3d | 2079 | |
14b3d9c9 JB |
2080 | /* Strip top-level references. */ |
2081 | while (TYPE_CODE (type) == TYPE_CODE_REF) | |
2082 | type = check_typedef (TYPE_TARGET_TYPE (type)); | |
2083 | ||
2084 | switch (TYPE_CODE (type)) | |
8b93c638 JM |
2085 | { |
2086 | case TYPE_CODE_STRUCT: | |
2087 | case TYPE_CODE_UNION: | |
2088 | return xstrdup ("{...}"); | |
2089 | /* break; */ | |
2090 | ||
2091 | case TYPE_CODE_ARRAY: | |
2092 | { | |
e64d9b3d | 2093 | char *number; |
b435e160 | 2094 | number = xstrprintf ("[%d]", var->num_children); |
e64d9b3d | 2095 | return (number); |
8b93c638 JM |
2096 | } |
2097 | /* break; */ | |
2098 | ||
2099 | default: | |
2100 | { | |
575bbeb6 KS |
2101 | if (var->value == NULL) |
2102 | { | |
2103 | /* This can happen if we attempt to get the value of a struct | |
2104 | member when the parent is an invalid pointer. This is an | |
2105 | error condition, so we should tell the caller. */ | |
2106 | return NULL; | |
2107 | } | |
2108 | else | |
2109 | { | |
b2c2bd75 | 2110 | gdb_assert (varobj_value_is_changeable_p (var)); |
acd65feb | 2111 | gdb_assert (!value_lazy (var->value)); |
85265413 NR |
2112 | return value_get_print_value (var->value, var->format); |
2113 | } | |
e64d9b3d | 2114 | } |
8b93c638 JM |
2115 | } |
2116 | } | |
2117 | \f | |
2118 | ||
2119 | /* C++ */ | |
2120 | ||
2121 | static int | |
fba45db2 | 2122 | cplus_number_of_children (struct varobj *var) |
8b93c638 JM |
2123 | { |
2124 | struct type *type; | |
2125 | int children, dont_know; | |
2126 | ||
2127 | dont_know = 1; | |
2128 | children = 0; | |
2129 | ||
2130 | if (!CPLUS_FAKE_CHILD (var)) | |
2131 | { | |
2132 | type = get_type_deref (var); | |
2133 | ||
2134 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
72330bd6 | 2135 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
8b93c638 JM |
2136 | { |
2137 | int kids[3]; | |
2138 | ||
2139 | cplus_class_num_children (type, kids); | |
2140 | if (kids[v_public] != 0) | |
2141 | children++; | |
2142 | if (kids[v_private] != 0) | |
2143 | children++; | |
2144 | if (kids[v_protected] != 0) | |
2145 | children++; | |
2146 | ||
2147 | /* Add any baseclasses */ | |
2148 | children += TYPE_N_BASECLASSES (type); | |
2149 | dont_know = 0; | |
2150 | ||
2151 | /* FIXME: save children in var */ | |
2152 | } | |
2153 | } | |
2154 | else | |
2155 | { | |
2156 | int kids[3]; | |
2157 | ||
2158 | type = get_type_deref (var->parent); | |
2159 | ||
2160 | cplus_class_num_children (type, kids); | |
6e382aa3 | 2161 | if (strcmp (var->name, "public") == 0) |
8b93c638 | 2162 | children = kids[v_public]; |
6e382aa3 | 2163 | else if (strcmp (var->name, "private") == 0) |
8b93c638 JM |
2164 | children = kids[v_private]; |
2165 | else | |
2166 | children = kids[v_protected]; | |
2167 | dont_know = 0; | |
2168 | } | |
2169 | ||
2170 | if (dont_know) | |
2171 | children = c_number_of_children (var); | |
2172 | ||
2173 | return children; | |
2174 | } | |
2175 | ||
2176 | /* Compute # of public, private, and protected variables in this class. | |
2177 | That means we need to descend into all baseclasses and find out | |
2178 | how many are there, too. */ | |
2179 | static void | |
1669605f | 2180 | cplus_class_num_children (struct type *type, int children[3]) |
8b93c638 JM |
2181 | { |
2182 | int i; | |
2183 | ||
2184 | children[v_public] = 0; | |
2185 | children[v_private] = 0; | |
2186 | children[v_protected] = 0; | |
2187 | ||
2188 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) | |
2189 | { | |
2190 | /* If we have a virtual table pointer, omit it. */ | |
72330bd6 | 2191 | if (TYPE_VPTR_BASETYPE (type) == type && TYPE_VPTR_FIELDNO (type) == i) |
8b93c638 JM |
2192 | continue; |
2193 | ||
2194 | if (TYPE_FIELD_PROTECTED (type, i)) | |
2195 | children[v_protected]++; | |
2196 | else if (TYPE_FIELD_PRIVATE (type, i)) | |
2197 | children[v_private]++; | |
2198 | else | |
2199 | children[v_public]++; | |
2200 | } | |
2201 | } | |
2202 | ||
2203 | static char * | |
fba45db2 | 2204 | cplus_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2205 | { |
2206 | return c_name_of_variable (parent); | |
2207 | } | |
2208 | ||
2209 | static char * | |
fba45db2 | 2210 | cplus_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2211 | { |
2212 | char *name; | |
2213 | struct type *type; | |
8b93c638 JM |
2214 | |
2215 | if (CPLUS_FAKE_CHILD (parent)) | |
2216 | { | |
2217 | /* Looking for children of public, private, or protected. */ | |
2218 | type = get_type_deref (parent->parent); | |
2219 | } | |
2220 | else | |
2221 | type = get_type_deref (parent); | |
2222 | ||
2223 | name = NULL; | |
2224 | switch (TYPE_CODE (type)) | |
2225 | { | |
2226 | case TYPE_CODE_STRUCT: | |
2227 | case TYPE_CODE_UNION: | |
8b93c638 JM |
2228 | if (CPLUS_FAKE_CHILD (parent)) |
2229 | { | |
6e382aa3 JJ |
2230 | /* The fields of the class type are ordered as they |
2231 | appear in the class. We are given an index for a | |
2232 | particular access control type ("public","protected", | |
2233 | or "private"). We must skip over fields that don't | |
2234 | have the access control we are looking for to properly | |
2235 | find the indexed field. */ | |
2236 | int type_index = TYPE_N_BASECLASSES (type); | |
2237 | if (strcmp (parent->name, "private") == 0) | |
2238 | { | |
2239 | while (index >= 0) | |
2240 | { | |
2241 | if (TYPE_VPTR_BASETYPE (type) == type | |
2242 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2243 | ; /* ignore vptr */ | |
2244 | else if (TYPE_FIELD_PRIVATE (type, type_index)) | |
2245 | --index; | |
2246 | ++type_index; | |
2247 | } | |
2248 | --type_index; | |
2249 | } | |
2250 | else if (strcmp (parent->name, "protected") == 0) | |
2251 | { | |
2252 | while (index >= 0) | |
2253 | { | |
2254 | if (TYPE_VPTR_BASETYPE (type) == type | |
2255 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2256 | ; /* ignore vptr */ | |
2257 | else if (TYPE_FIELD_PROTECTED (type, type_index)) | |
2258 | --index; | |
2259 | ++type_index; | |
2260 | } | |
2261 | --type_index; | |
2262 | } | |
2263 | else | |
2264 | { | |
2265 | while (index >= 0) | |
2266 | { | |
2267 | if (TYPE_VPTR_BASETYPE (type) == type | |
2268 | && type_index == TYPE_VPTR_FIELDNO (type)) | |
2269 | ; /* ignore vptr */ | |
2270 | else if (!TYPE_FIELD_PRIVATE (type, type_index) && | |
2271 | !TYPE_FIELD_PROTECTED (type, type_index)) | |
2272 | --index; | |
2273 | ++type_index; | |
2274 | } | |
2275 | --type_index; | |
2276 | } | |
2277 | ||
2278 | name = TYPE_FIELD_NAME (type, type_index); | |
8b93c638 JM |
2279 | } |
2280 | else if (index < TYPE_N_BASECLASSES (type)) | |
6e382aa3 | 2281 | /* We are looking up the name of a base class */ |
8b93c638 JM |
2282 | name = TYPE_FIELD_NAME (type, index); |
2283 | else | |
2284 | { | |
6e382aa3 JJ |
2285 | int children[3]; |
2286 | cplus_class_num_children(type, children); | |
2287 | ||
8b93c638 | 2288 | /* Everything beyond the baseclasses can |
6e382aa3 JJ |
2289 | only be "public", "private", or "protected" |
2290 | ||
2291 | The special "fake" children are always output by varobj in | |
2292 | this order. So if INDEX == 2, it MUST be "protected". */ | |
8b93c638 JM |
2293 | index -= TYPE_N_BASECLASSES (type); |
2294 | switch (index) | |
2295 | { | |
2296 | case 0: | |
6e382aa3 JJ |
2297 | if (children[v_public] > 0) |
2298 | name = "public"; | |
2299 | else if (children[v_private] > 0) | |
2300 | name = "private"; | |
2301 | else | |
2302 | name = "protected"; | |
2303 | break; | |
8b93c638 | 2304 | case 1: |
6e382aa3 | 2305 | if (children[v_public] > 0) |
8b93c638 | 2306 | { |
6e382aa3 JJ |
2307 | if (children[v_private] > 0) |
2308 | name = "private"; | |
2309 | else | |
2310 | name = "protected"; | |
8b93c638 | 2311 | } |
6e382aa3 JJ |
2312 | else if (children[v_private] > 0) |
2313 | name = "protected"; | |
2314 | break; | |
8b93c638 | 2315 | case 2: |
6e382aa3 JJ |
2316 | /* Must be protected */ |
2317 | name = "protected"; | |
2318 | break; | |
8b93c638 JM |
2319 | default: |
2320 | /* error! */ | |
2321 | break; | |
2322 | } | |
2323 | } | |
2324 | break; | |
2325 | ||
2326 | default: | |
2327 | break; | |
2328 | } | |
2329 | ||
2330 | if (name == NULL) | |
2331 | return c_name_of_child (parent, index); | |
2332 | else | |
2333 | { | |
2334 | if (name != NULL) | |
2335 | name = savestring (name, strlen (name)); | |
2336 | } | |
2337 | ||
2338 | return name; | |
2339 | } | |
2340 | ||
30b28db1 | 2341 | static struct value * |
fba45db2 | 2342 | cplus_value_of_root (struct varobj **var_handle) |
8b93c638 | 2343 | { |
73a93a32 | 2344 | return c_value_of_root (var_handle); |
8b93c638 JM |
2345 | } |
2346 | ||
30b28db1 | 2347 | static struct value * |
fba45db2 | 2348 | cplus_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2349 | { |
2350 | struct type *type; | |
30b28db1 | 2351 | struct value *value; |
8b93c638 JM |
2352 | |
2353 | if (CPLUS_FAKE_CHILD (parent)) | |
2354 | type = get_type_deref (parent->parent); | |
2355 | else | |
2356 | type = get_type_deref (parent); | |
2357 | ||
2358 | value = NULL; | |
8b93c638 JM |
2359 | |
2360 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || | |
2361 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) | |
2362 | { | |
2363 | if (CPLUS_FAKE_CHILD (parent)) | |
2364 | { | |
5bbc1a8e | 2365 | char *name; |
30b28db1 | 2366 | struct value *temp = parent->parent->value; |
30c6b1fb | 2367 | |
575bbeb6 KS |
2368 | if (temp == NULL) |
2369 | return NULL; | |
2370 | ||
5bbc1a8e | 2371 | name = name_of_child (parent, index); |
30c6b1fb KS |
2372 | gdb_value_struct_elt (NULL, &value, &temp, NULL, name, NULL, |
2373 | "cplus_structure"); | |
2374 | if (value != NULL) | |
2375 | release_value (value); | |
5bbc1a8e KS |
2376 | |
2377 | xfree (name); | |
8b93c638 JM |
2378 | } |
2379 | else if (index >= TYPE_N_BASECLASSES (type)) | |
2380 | { | |
2381 | /* public, private, or protected */ | |
2382 | return NULL; | |
2383 | } | |
2384 | else | |
2385 | { | |
2386 | /* Baseclass */ | |
2387 | if (parent->value != NULL) | |
2388 | { | |
575bbeb6 | 2389 | struct value *temp = NULL; |
8b93c638 | 2390 | |
4ae4f4fb VP |
2391 | /* No special processing for references is needed -- |
2392 | value_cast below handles references. */ | |
2393 | if (TYPE_CODE (value_type (parent->value)) == TYPE_CODE_PTR) | |
4abb499e KS |
2394 | { |
2395 | if (!gdb_value_ind (parent->value, &temp)) | |
2396 | return NULL; | |
2397 | } | |
8b93c638 JM |
2398 | else |
2399 | temp = parent->value; | |
2400 | ||
575bbeb6 KS |
2401 | if (temp != NULL) |
2402 | { | |
2403 | value = value_cast (TYPE_FIELD_TYPE (type, index), temp); | |
2404 | release_value (value); | |
2405 | } | |
2406 | else | |
2407 | { | |
2408 | /* We failed to evaluate the parent's value, so don't even | |
2409 | bother trying to evaluate this child. */ | |
2410 | return NULL; | |
2411 | } | |
8b93c638 JM |
2412 | } |
2413 | } | |
2414 | } | |
2415 | ||
2416 | if (value == NULL) | |
2417 | return c_value_of_child (parent, index); | |
2418 | ||
2419 | return value; | |
2420 | } | |
2421 | ||
2422 | static struct type * | |
fba45db2 | 2423 | cplus_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2424 | { |
2425 | struct type *type, *t; | |
2426 | ||
575bbeb6 KS |
2427 | if (CPLUS_FAKE_CHILD (parent)) |
2428 | { | |
2429 | /* Looking for the type of a child of public, private, or protected. */ | |
2430 | t = get_type_deref (parent->parent); | |
2431 | } | |
2432 | else | |
2433 | t = get_type_deref (parent); | |
2434 | ||
8b93c638 JM |
2435 | type = NULL; |
2436 | switch (TYPE_CODE (t)) | |
2437 | { | |
2438 | case TYPE_CODE_STRUCT: | |
2439 | case TYPE_CODE_UNION: | |
575bbeb6 | 2440 | if (CPLUS_FAKE_CHILD (parent)) |
8b93c638 | 2441 | { |
575bbeb6 KS |
2442 | char *name = cplus_name_of_child (parent, index); |
2443 | type = lookup_struct_elt_type (t, name, 0); | |
2444 | xfree (name); | |
8b93c638 | 2445 | } |
575bbeb6 KS |
2446 | else if (index < TYPE_N_BASECLASSES (t)) |
2447 | type = TYPE_FIELD_TYPE (t, index); | |
8b93c638 JM |
2448 | else |
2449 | { | |
575bbeb6 KS |
2450 | /* special */ |
2451 | return NULL; | |
8b93c638 JM |
2452 | } |
2453 | break; | |
2454 | ||
2455 | default: | |
2456 | break; | |
2457 | } | |
2458 | ||
2459 | if (type == NULL) | |
2460 | return c_type_of_child (parent, index); | |
2461 | ||
2462 | return type; | |
2463 | } | |
2464 | ||
2465 | static int | |
fba45db2 | 2466 | cplus_variable_editable (struct varobj *var) |
8b93c638 JM |
2467 | { |
2468 | if (CPLUS_FAKE_CHILD (var)) | |
2469 | return 0; | |
2470 | ||
2471 | return c_variable_editable (var); | |
2472 | } | |
2473 | ||
2474 | static char * | |
fba45db2 | 2475 | cplus_value_of_variable (struct varobj *var) |
8b93c638 JM |
2476 | { |
2477 | ||
2478 | /* If we have one of our special types, don't print out | |
2479 | any value. */ | |
2480 | if (CPLUS_FAKE_CHILD (var)) | |
2481 | return xstrdup (""); | |
2482 | ||
2483 | return c_value_of_variable (var); | |
2484 | } | |
2485 | \f | |
2486 | /* Java */ | |
2487 | ||
2488 | static int | |
fba45db2 | 2489 | java_number_of_children (struct varobj *var) |
8b93c638 JM |
2490 | { |
2491 | return cplus_number_of_children (var); | |
2492 | } | |
2493 | ||
2494 | static char * | |
fba45db2 | 2495 | java_name_of_variable (struct varobj *parent) |
8b93c638 JM |
2496 | { |
2497 | char *p, *name; | |
2498 | ||
2499 | name = cplus_name_of_variable (parent); | |
2500 | /* If the name has "-" in it, it is because we | |
2501 | needed to escape periods in the name... */ | |
2502 | p = name; | |
2503 | ||
2504 | while (*p != '\000') | |
2505 | { | |
2506 | if (*p == '-') | |
2507 | *p = '.'; | |
2508 | p++; | |
2509 | } | |
2510 | ||
2511 | return name; | |
2512 | } | |
2513 | ||
2514 | static char * | |
fba45db2 | 2515 | java_name_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2516 | { |
2517 | char *name, *p; | |
2518 | ||
2519 | name = cplus_name_of_child (parent, index); | |
2520 | /* Escape any periods in the name... */ | |
2521 | p = name; | |
2522 | ||
2523 | while (*p != '\000') | |
2524 | { | |
2525 | if (*p == '.') | |
2526 | *p = '-'; | |
2527 | p++; | |
2528 | } | |
2529 | ||
2530 | return name; | |
2531 | } | |
2532 | ||
30b28db1 | 2533 | static struct value * |
fba45db2 | 2534 | java_value_of_root (struct varobj **var_handle) |
8b93c638 | 2535 | { |
73a93a32 | 2536 | return cplus_value_of_root (var_handle); |
8b93c638 JM |
2537 | } |
2538 | ||
30b28db1 | 2539 | static struct value * |
fba45db2 | 2540 | java_value_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2541 | { |
2542 | return cplus_value_of_child (parent, index); | |
2543 | } | |
2544 | ||
2545 | static struct type * | |
fba45db2 | 2546 | java_type_of_child (struct varobj *parent, int index) |
8b93c638 JM |
2547 | { |
2548 | return cplus_type_of_child (parent, index); | |
2549 | } | |
2550 | ||
2551 | static int | |
fba45db2 | 2552 | java_variable_editable (struct varobj *var) |
8b93c638 JM |
2553 | { |
2554 | return cplus_variable_editable (var); | |
2555 | } | |
2556 | ||
2557 | static char * | |
fba45db2 | 2558 | java_value_of_variable (struct varobj *var) |
8b93c638 JM |
2559 | { |
2560 | return cplus_value_of_variable (var); | |
2561 | } | |
2562 | \f | |
2563 | extern void _initialize_varobj (void); | |
2564 | void | |
2565 | _initialize_varobj (void) | |
2566 | { | |
2567 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; | |
2568 | ||
2569 | varobj_table = xmalloc (sizeof_table); | |
2570 | memset (varobj_table, 0, sizeof_table); | |
2571 | ||
85c07804 AC |
2572 | add_setshow_zinteger_cmd ("debugvarobj", class_maintenance, |
2573 | &varobjdebug, _("\ | |
2574 | Set varobj debugging."), _("\ | |
2575 | Show varobj debugging."), _("\ | |
2576 | When non-zero, varobj debugging is enabled."), | |
2577 | NULL, | |
920d2a44 | 2578 | show_varobjdebug, |
85c07804 | 2579 | &setlist, &showlist); |
8b93c638 | 2580 | } |