| 1 | /* Implementation of the GDB variable objects API. |
| 2 | |
| 3 | Copyright (C) 1999-2012 Free Software Foundation, Inc. |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include "defs.h" |
| 19 | #include "exceptions.h" |
| 20 | #include "value.h" |
| 21 | #include "expression.h" |
| 22 | #include "frame.h" |
| 23 | #include "language.h" |
| 24 | #include "gdbcmd.h" |
| 25 | #include "block.h" |
| 26 | #include "valprint.h" |
| 27 | |
| 28 | #include "gdb_assert.h" |
| 29 | #include "gdb_string.h" |
| 30 | #include "gdb_regex.h" |
| 31 | |
| 32 | #include "varobj.h" |
| 33 | #include "vec.h" |
| 34 | #include "gdbthread.h" |
| 35 | #include "inferior.h" |
| 36 | #include "ada-varobj.h" |
| 37 | #include "ada-lang.h" |
| 38 | |
| 39 | #if HAVE_PYTHON |
| 40 | #include "python/python.h" |
| 41 | #include "python/python-internal.h" |
| 42 | #else |
| 43 | typedef int PyObject; |
| 44 | #endif |
| 45 | |
| 46 | /* The names of varobjs representing anonymous structs or unions. */ |
| 47 | #define ANONYMOUS_STRUCT_NAME _("<anonymous struct>") |
| 48 | #define ANONYMOUS_UNION_NAME _("<anonymous union>") |
| 49 | |
| 50 | /* Non-zero if we want to see trace of varobj level stuff. */ |
| 51 | |
| 52 | unsigned int varobjdebug = 0; |
| 53 | static void |
| 54 | show_varobjdebug (struct ui_file *file, int from_tty, |
| 55 | struct cmd_list_element *c, const char *value) |
| 56 | { |
| 57 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); |
| 58 | } |
| 59 | |
| 60 | /* String representations of gdb's format codes. */ |
| 61 | char *varobj_format_string[] = |
| 62 | { "natural", "binary", "decimal", "hexadecimal", "octal" }; |
| 63 | |
| 64 | /* String representations of gdb's known languages. */ |
| 65 | char *varobj_language_string[] = { "unknown", "C", "C++", "Java" }; |
| 66 | |
| 67 | /* True if we want to allow Python-based pretty-printing. */ |
| 68 | static int pretty_printing = 0; |
| 69 | |
| 70 | void |
| 71 | varobj_enable_pretty_printing (void) |
| 72 | { |
| 73 | pretty_printing = 1; |
| 74 | } |
| 75 | |
| 76 | /* Data structures */ |
| 77 | |
| 78 | /* Every root variable has one of these structures saved in its |
| 79 | varobj. Members which must be free'd are noted. */ |
| 80 | struct varobj_root |
| 81 | { |
| 82 | |
| 83 | /* Alloc'd expression for this parent. */ |
| 84 | struct expression *exp; |
| 85 | |
| 86 | /* Block for which this expression is valid. */ |
| 87 | const struct block *valid_block; |
| 88 | |
| 89 | /* The frame for this expression. This field is set iff valid_block is |
| 90 | not NULL. */ |
| 91 | struct frame_id frame; |
| 92 | |
| 93 | /* The thread ID that this varobj_root belong to. This field |
| 94 | is only valid if valid_block is not NULL. |
| 95 | When not 0, indicates which thread 'frame' belongs to. |
| 96 | When 0, indicates that the thread list was empty when the varobj_root |
| 97 | was created. */ |
| 98 | int thread_id; |
| 99 | |
| 100 | /* If 1, the -var-update always recomputes the value in the |
| 101 | current thread and frame. Otherwise, variable object is |
| 102 | always updated in the specific scope/thread/frame. */ |
| 103 | int floating; |
| 104 | |
| 105 | /* Flag that indicates validity: set to 0 when this varobj_root refers |
| 106 | to symbols that do not exist anymore. */ |
| 107 | int is_valid; |
| 108 | |
| 109 | /* Language info for this variable and its children. */ |
| 110 | struct language_specific *lang; |
| 111 | |
| 112 | /* The varobj for this root node. */ |
| 113 | struct varobj *rootvar; |
| 114 | |
| 115 | /* Next root variable */ |
| 116 | struct varobj_root *next; |
| 117 | }; |
| 118 | |
| 119 | /* Every variable in the system has a structure of this type defined |
| 120 | for it. This structure holds all information necessary to manipulate |
| 121 | a particular object variable. Members which must be freed are noted. */ |
| 122 | struct varobj |
| 123 | { |
| 124 | |
| 125 | /* Alloc'd name of the variable for this object. If this variable is a |
| 126 | child, then this name will be the child's source name. |
| 127 | (bar, not foo.bar). */ |
| 128 | /* NOTE: This is the "expression". */ |
| 129 | char *name; |
| 130 | |
| 131 | /* Alloc'd expression for this child. Can be used to create a |
| 132 | root variable corresponding to this child. */ |
| 133 | char *path_expr; |
| 134 | |
| 135 | /* The alloc'd name for this variable's object. This is here for |
| 136 | convenience when constructing this object's children. */ |
| 137 | char *obj_name; |
| 138 | |
| 139 | /* Index of this variable in its parent or -1. */ |
| 140 | int index; |
| 141 | |
| 142 | /* The type of this variable. This can be NULL |
| 143 | for artifial variable objects -- currently, the "accessibility" |
| 144 | variable objects in C++. */ |
| 145 | struct type *type; |
| 146 | |
| 147 | /* The value of this expression or subexpression. A NULL value |
| 148 | indicates there was an error getting this value. |
| 149 | Invariant: if varobj_value_is_changeable_p (this) is non-zero, |
| 150 | the value is either NULL, or not lazy. */ |
| 151 | struct value *value; |
| 152 | |
| 153 | /* The number of (immediate) children this variable has. */ |
| 154 | int num_children; |
| 155 | |
| 156 | /* If this object is a child, this points to its immediate parent. */ |
| 157 | struct varobj *parent; |
| 158 | |
| 159 | /* Children of this object. */ |
| 160 | VEC (varobj_p) *children; |
| 161 | |
| 162 | /* Whether the children of this varobj were requested. This field is |
| 163 | used to decide if dynamic varobj should recompute their children. |
| 164 | In the event that the frontend never asked for the children, we |
| 165 | can avoid that. */ |
| 166 | int children_requested; |
| 167 | |
| 168 | /* Description of the root variable. Points to root variable for |
| 169 | children. */ |
| 170 | struct varobj_root *root; |
| 171 | |
| 172 | /* The format of the output for this object. */ |
| 173 | enum varobj_display_formats format; |
| 174 | |
| 175 | /* Was this variable updated via a varobj_set_value operation. */ |
| 176 | int updated; |
| 177 | |
| 178 | /* Last print value. */ |
| 179 | char *print_value; |
| 180 | |
| 181 | /* Is this variable frozen. Frozen variables are never implicitly |
| 182 | updated by -var-update * |
| 183 | or -var-update <direct-or-indirect-parent>. */ |
| 184 | int frozen; |
| 185 | |
| 186 | /* Is the value of this variable intentionally not fetched? It is |
| 187 | not fetched if either the variable is frozen, or any parents is |
| 188 | frozen. */ |
| 189 | int not_fetched; |
| 190 | |
| 191 | /* Sub-range of children which the MI consumer has requested. If |
| 192 | FROM < 0 or TO < 0, means that all children have been |
| 193 | requested. */ |
| 194 | int from; |
| 195 | int to; |
| 196 | |
| 197 | /* The pretty-printer constructor. If NULL, then the default |
| 198 | pretty-printer will be looked up. If None, then no |
| 199 | pretty-printer will be installed. */ |
| 200 | PyObject *constructor; |
| 201 | |
| 202 | /* The pretty-printer that has been constructed. If NULL, then a |
| 203 | new printer object is needed, and one will be constructed. */ |
| 204 | PyObject *pretty_printer; |
| 205 | |
| 206 | /* The iterator returned by the printer's 'children' method, or NULL |
| 207 | if not available. */ |
| 208 | PyObject *child_iter; |
| 209 | |
| 210 | /* We request one extra item from the iterator, so that we can |
| 211 | report to the caller whether there are more items than we have |
| 212 | already reported. However, we don't want to install this value |
| 213 | when we read it, because that will mess up future updates. So, |
| 214 | we stash it here instead. */ |
| 215 | PyObject *saved_item; |
| 216 | }; |
| 217 | |
| 218 | struct cpstack |
| 219 | { |
| 220 | char *name; |
| 221 | struct cpstack *next; |
| 222 | }; |
| 223 | |
| 224 | /* A list of varobjs */ |
| 225 | |
| 226 | struct vlist |
| 227 | { |
| 228 | struct varobj *var; |
| 229 | struct vlist *next; |
| 230 | }; |
| 231 | |
| 232 | /* Private function prototypes */ |
| 233 | |
| 234 | /* Helper functions for the above subcommands. */ |
| 235 | |
| 236 | static int delete_variable (struct cpstack **, struct varobj *, int); |
| 237 | |
| 238 | static void delete_variable_1 (struct cpstack **, int *, |
| 239 | struct varobj *, int, int); |
| 240 | |
| 241 | static int install_variable (struct varobj *); |
| 242 | |
| 243 | static void uninstall_variable (struct varobj *); |
| 244 | |
| 245 | static struct varobj *create_child (struct varobj *, int, char *); |
| 246 | |
| 247 | static struct varobj * |
| 248 | create_child_with_value (struct varobj *parent, int index, const char *name, |
| 249 | struct value *value); |
| 250 | |
| 251 | /* Utility routines */ |
| 252 | |
| 253 | static struct varobj *new_variable (void); |
| 254 | |
| 255 | static struct varobj *new_root_variable (void); |
| 256 | |
| 257 | static void free_variable (struct varobj *var); |
| 258 | |
| 259 | static struct cleanup *make_cleanup_free_variable (struct varobj *var); |
| 260 | |
| 261 | static struct type *get_type (struct varobj *var); |
| 262 | |
| 263 | static struct type *get_value_type (struct varobj *var); |
| 264 | |
| 265 | static struct type *get_target_type (struct type *); |
| 266 | |
| 267 | static enum varobj_display_formats variable_default_display (struct varobj *); |
| 268 | |
| 269 | static void cppush (struct cpstack **pstack, char *name); |
| 270 | |
| 271 | static char *cppop (struct cpstack **pstack); |
| 272 | |
| 273 | static int update_type_if_necessary (struct varobj *var, |
| 274 | struct value *new_value); |
| 275 | |
| 276 | static int install_new_value (struct varobj *var, struct value *value, |
| 277 | int initial); |
| 278 | |
| 279 | /* Language-specific routines. */ |
| 280 | |
| 281 | static enum varobj_languages variable_language (struct varobj *var); |
| 282 | |
| 283 | static int number_of_children (struct varobj *); |
| 284 | |
| 285 | static char *name_of_variable (struct varobj *); |
| 286 | |
| 287 | static char *name_of_child (struct varobj *, int); |
| 288 | |
| 289 | static struct value *value_of_root (struct varobj **var_handle, int *); |
| 290 | |
| 291 | static struct value *value_of_child (struct varobj *parent, int index); |
| 292 | |
| 293 | static char *my_value_of_variable (struct varobj *var, |
| 294 | enum varobj_display_formats format); |
| 295 | |
| 296 | static char *value_get_print_value (struct value *value, |
| 297 | enum varobj_display_formats format, |
| 298 | struct varobj *var); |
| 299 | |
| 300 | static int varobj_value_is_changeable_p (struct varobj *var); |
| 301 | |
| 302 | static int is_root_p (struct varobj *var); |
| 303 | |
| 304 | #if HAVE_PYTHON |
| 305 | |
| 306 | static struct varobj *varobj_add_child (struct varobj *var, |
| 307 | const char *name, |
| 308 | struct value *value); |
| 309 | |
| 310 | #endif /* HAVE_PYTHON */ |
| 311 | |
| 312 | static int default_value_is_changeable_p (struct varobj *var); |
| 313 | |
| 314 | /* C implementation */ |
| 315 | |
| 316 | static int c_number_of_children (struct varobj *var); |
| 317 | |
| 318 | static char *c_name_of_variable (struct varobj *parent); |
| 319 | |
| 320 | static char *c_name_of_child (struct varobj *parent, int index); |
| 321 | |
| 322 | static char *c_path_expr_of_child (struct varobj *child); |
| 323 | |
| 324 | static struct value *c_value_of_root (struct varobj **var_handle); |
| 325 | |
| 326 | static struct value *c_value_of_child (struct varobj *parent, int index); |
| 327 | |
| 328 | static struct type *c_type_of_child (struct varobj *parent, int index); |
| 329 | |
| 330 | static char *c_value_of_variable (struct varobj *var, |
| 331 | enum varobj_display_formats format); |
| 332 | |
| 333 | /* C++ implementation */ |
| 334 | |
| 335 | static int cplus_number_of_children (struct varobj *var); |
| 336 | |
| 337 | static void cplus_class_num_children (struct type *type, int children[3]); |
| 338 | |
| 339 | static char *cplus_name_of_variable (struct varobj *parent); |
| 340 | |
| 341 | static char *cplus_name_of_child (struct varobj *parent, int index); |
| 342 | |
| 343 | static char *cplus_path_expr_of_child (struct varobj *child); |
| 344 | |
| 345 | static struct value *cplus_value_of_root (struct varobj **var_handle); |
| 346 | |
| 347 | static struct value *cplus_value_of_child (struct varobj *parent, int index); |
| 348 | |
| 349 | static struct type *cplus_type_of_child (struct varobj *parent, int index); |
| 350 | |
| 351 | static char *cplus_value_of_variable (struct varobj *var, |
| 352 | enum varobj_display_formats format); |
| 353 | |
| 354 | /* Java implementation */ |
| 355 | |
| 356 | static int java_number_of_children (struct varobj *var); |
| 357 | |
| 358 | static char *java_name_of_variable (struct varobj *parent); |
| 359 | |
| 360 | static char *java_name_of_child (struct varobj *parent, int index); |
| 361 | |
| 362 | static char *java_path_expr_of_child (struct varobj *child); |
| 363 | |
| 364 | static struct value *java_value_of_root (struct varobj **var_handle); |
| 365 | |
| 366 | static struct value *java_value_of_child (struct varobj *parent, int index); |
| 367 | |
| 368 | static struct type *java_type_of_child (struct varobj *parent, int index); |
| 369 | |
| 370 | static char *java_value_of_variable (struct varobj *var, |
| 371 | enum varobj_display_formats format); |
| 372 | |
| 373 | /* Ada implementation */ |
| 374 | |
| 375 | static int ada_number_of_children (struct varobj *var); |
| 376 | |
| 377 | static char *ada_name_of_variable (struct varobj *parent); |
| 378 | |
| 379 | static char *ada_name_of_child (struct varobj *parent, int index); |
| 380 | |
| 381 | static char *ada_path_expr_of_child (struct varobj *child); |
| 382 | |
| 383 | static struct value *ada_value_of_root (struct varobj **var_handle); |
| 384 | |
| 385 | static struct value *ada_value_of_child (struct varobj *parent, int index); |
| 386 | |
| 387 | static struct type *ada_type_of_child (struct varobj *parent, int index); |
| 388 | |
| 389 | static char *ada_value_of_variable (struct varobj *var, |
| 390 | enum varobj_display_formats format); |
| 391 | |
| 392 | static int ada_value_is_changeable_p (struct varobj *var); |
| 393 | |
| 394 | static int ada_value_has_mutated (struct varobj *var, struct value *new_val, |
| 395 | struct type *new_type); |
| 396 | |
| 397 | /* The language specific vector */ |
| 398 | |
| 399 | struct language_specific |
| 400 | { |
| 401 | |
| 402 | /* The language of this variable. */ |
| 403 | enum varobj_languages language; |
| 404 | |
| 405 | /* The number of children of PARENT. */ |
| 406 | int (*number_of_children) (struct varobj * parent); |
| 407 | |
| 408 | /* The name (expression) of a root varobj. */ |
| 409 | char *(*name_of_variable) (struct varobj * parent); |
| 410 | |
| 411 | /* The name of the INDEX'th child of PARENT. */ |
| 412 | char *(*name_of_child) (struct varobj * parent, int index); |
| 413 | |
| 414 | /* Returns the rooted expression of CHILD, which is a variable |
| 415 | obtain that has some parent. */ |
| 416 | char *(*path_expr_of_child) (struct varobj * child); |
| 417 | |
| 418 | /* The ``struct value *'' of the root variable ROOT. */ |
| 419 | struct value *(*value_of_root) (struct varobj ** root_handle); |
| 420 | |
| 421 | /* The ``struct value *'' of the INDEX'th child of PARENT. */ |
| 422 | struct value *(*value_of_child) (struct varobj * parent, int index); |
| 423 | |
| 424 | /* The type of the INDEX'th child of PARENT. */ |
| 425 | struct type *(*type_of_child) (struct varobj * parent, int index); |
| 426 | |
| 427 | /* The current value of VAR. */ |
| 428 | char *(*value_of_variable) (struct varobj * var, |
| 429 | enum varobj_display_formats format); |
| 430 | |
| 431 | /* Return non-zero if changes in value of VAR must be detected and |
| 432 | reported by -var-update. Return zero if -var-update should never |
| 433 | report changes of such values. This makes sense for structures |
| 434 | (since the changes in children values will be reported separately), |
| 435 | or for artifical objects (like 'public' pseudo-field in C++). |
| 436 | |
| 437 | Return value of 0 means that gdb need not call value_fetch_lazy |
| 438 | for the value of this variable object. */ |
| 439 | int (*value_is_changeable_p) (struct varobj *var); |
| 440 | |
| 441 | /* Return nonzero if the type of VAR has mutated. |
| 442 | |
| 443 | VAR's value is still the varobj's previous value, while NEW_VALUE |
| 444 | is VAR's new value and NEW_TYPE is the var's new type. NEW_VALUE |
| 445 | may be NULL indicating that there is no value available (the varobj |
| 446 | may be out of scope, of may be the child of a null pointer, for |
| 447 | instance). NEW_TYPE, on the other hand, must never be NULL. |
| 448 | |
| 449 | This function should also be able to assume that var's number of |
| 450 | children is set (not < 0). |
| 451 | |
| 452 | Languages where types do not mutate can set this to NULL. */ |
| 453 | int (*value_has_mutated) (struct varobj *var, struct value *new_value, |
| 454 | struct type *new_type); |
| 455 | }; |
| 456 | |
| 457 | /* Array of known source language routines. */ |
| 458 | static struct language_specific languages[vlang_end] = { |
| 459 | /* Unknown (try treating as C). */ |
| 460 | { |
| 461 | vlang_unknown, |
| 462 | c_number_of_children, |
| 463 | c_name_of_variable, |
| 464 | c_name_of_child, |
| 465 | c_path_expr_of_child, |
| 466 | c_value_of_root, |
| 467 | c_value_of_child, |
| 468 | c_type_of_child, |
| 469 | c_value_of_variable, |
| 470 | default_value_is_changeable_p, |
| 471 | NULL /* value_has_mutated */} |
| 472 | , |
| 473 | /* C */ |
| 474 | { |
| 475 | vlang_c, |
| 476 | c_number_of_children, |
| 477 | c_name_of_variable, |
| 478 | c_name_of_child, |
| 479 | c_path_expr_of_child, |
| 480 | c_value_of_root, |
| 481 | c_value_of_child, |
| 482 | c_type_of_child, |
| 483 | c_value_of_variable, |
| 484 | default_value_is_changeable_p, |
| 485 | NULL /* value_has_mutated */} |
| 486 | , |
| 487 | /* C++ */ |
| 488 | { |
| 489 | vlang_cplus, |
| 490 | cplus_number_of_children, |
| 491 | cplus_name_of_variable, |
| 492 | cplus_name_of_child, |
| 493 | cplus_path_expr_of_child, |
| 494 | cplus_value_of_root, |
| 495 | cplus_value_of_child, |
| 496 | cplus_type_of_child, |
| 497 | cplus_value_of_variable, |
| 498 | default_value_is_changeable_p, |
| 499 | NULL /* value_has_mutated */} |
| 500 | , |
| 501 | /* Java */ |
| 502 | { |
| 503 | vlang_java, |
| 504 | java_number_of_children, |
| 505 | java_name_of_variable, |
| 506 | java_name_of_child, |
| 507 | java_path_expr_of_child, |
| 508 | java_value_of_root, |
| 509 | java_value_of_child, |
| 510 | java_type_of_child, |
| 511 | java_value_of_variable, |
| 512 | default_value_is_changeable_p, |
| 513 | NULL /* value_has_mutated */}, |
| 514 | /* Ada */ |
| 515 | { |
| 516 | vlang_ada, |
| 517 | ada_number_of_children, |
| 518 | ada_name_of_variable, |
| 519 | ada_name_of_child, |
| 520 | ada_path_expr_of_child, |
| 521 | ada_value_of_root, |
| 522 | ada_value_of_child, |
| 523 | ada_type_of_child, |
| 524 | ada_value_of_variable, |
| 525 | ada_value_is_changeable_p, |
| 526 | ada_value_has_mutated} |
| 527 | }; |
| 528 | |
| 529 | /* A little convenience enum for dealing with C++/Java. */ |
| 530 | enum vsections |
| 531 | { |
| 532 | v_public = 0, v_private, v_protected |
| 533 | }; |
| 534 | |
| 535 | /* Private data */ |
| 536 | |
| 537 | /* Mappings of varobj_display_formats enums to gdb's format codes. */ |
| 538 | static int format_code[] = { 0, 't', 'd', 'x', 'o' }; |
| 539 | |
| 540 | /* Header of the list of root variable objects. */ |
| 541 | static struct varobj_root *rootlist; |
| 542 | |
| 543 | /* Prime number indicating the number of buckets in the hash table. */ |
| 544 | /* A prime large enough to avoid too many colisions. */ |
| 545 | #define VAROBJ_TABLE_SIZE 227 |
| 546 | |
| 547 | /* Pointer to the varobj hash table (built at run time). */ |
| 548 | static struct vlist **varobj_table; |
| 549 | |
| 550 | /* Is the variable X one of our "fake" children? */ |
| 551 | #define CPLUS_FAKE_CHILD(x) \ |
| 552 | ((x) != NULL && (x)->type == NULL && (x)->value == NULL) |
| 553 | \f |
| 554 | |
| 555 | /* API Implementation */ |
| 556 | static int |
| 557 | is_root_p (struct varobj *var) |
| 558 | { |
| 559 | return (var->root->rootvar == var); |
| 560 | } |
| 561 | |
| 562 | #ifdef HAVE_PYTHON |
| 563 | /* Helper function to install a Python environment suitable for |
| 564 | use during operations on VAR. */ |
| 565 | static struct cleanup * |
| 566 | varobj_ensure_python_env (struct varobj *var) |
| 567 | { |
| 568 | return ensure_python_env (var->root->exp->gdbarch, |
| 569 | var->root->exp->language_defn); |
| 570 | } |
| 571 | #endif |
| 572 | |
| 573 | /* Creates a varobj (not its children). */ |
| 574 | |
| 575 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
| 576 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ |
| 577 | |
| 578 | static struct frame_info * |
| 579 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) |
| 580 | { |
| 581 | struct frame_info *frame = NULL; |
| 582 | |
| 583 | if (frame_addr == (CORE_ADDR) 0) |
| 584 | return NULL; |
| 585 | |
| 586 | for (frame = get_current_frame (); |
| 587 | frame != NULL; |
| 588 | frame = get_prev_frame (frame)) |
| 589 | { |
| 590 | /* The CORE_ADDR we get as argument was parsed from a string GDB |
| 591 | output as $fp. This output got truncated to gdbarch_addr_bit. |
| 592 | Truncate the frame base address in the same manner before |
| 593 | comparing it against our argument. */ |
| 594 | CORE_ADDR frame_base = get_frame_base_address (frame); |
| 595 | int addr_bit = gdbarch_addr_bit (get_frame_arch (frame)); |
| 596 | |
| 597 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
| 598 | frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1; |
| 599 | |
| 600 | if (frame_base == frame_addr) |
| 601 | return frame; |
| 602 | } |
| 603 | |
| 604 | return NULL; |
| 605 | } |
| 606 | |
| 607 | struct varobj * |
| 608 | varobj_create (char *objname, |
| 609 | char *expression, CORE_ADDR frame, enum varobj_type type) |
| 610 | { |
| 611 | struct varobj *var; |
| 612 | struct cleanup *old_chain; |
| 613 | |
| 614 | /* Fill out a varobj structure for the (root) variable being constructed. */ |
| 615 | var = new_root_variable (); |
| 616 | old_chain = make_cleanup_free_variable (var); |
| 617 | |
| 618 | if (expression != NULL) |
| 619 | { |
| 620 | struct frame_info *fi; |
| 621 | struct frame_id old_id = null_frame_id; |
| 622 | struct block *block; |
| 623 | char *p; |
| 624 | enum varobj_languages lang; |
| 625 | struct value *value = NULL; |
| 626 | volatile struct gdb_exception except; |
| 627 | CORE_ADDR pc; |
| 628 | |
| 629 | /* Parse and evaluate the expression, filling in as much of the |
| 630 | variable's data as possible. */ |
| 631 | |
| 632 | if (has_stack_frames ()) |
| 633 | { |
| 634 | /* Allow creator to specify context of variable. */ |
| 635 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
| 636 | fi = get_selected_frame (NULL); |
| 637 | else |
| 638 | /* FIXME: cagney/2002-11-23: This code should be doing a |
| 639 | lookup using the frame ID and not just the frame's |
| 640 | ``address''. This, of course, means an interface |
| 641 | change. However, with out that interface change ISAs, |
| 642 | such as the ia64 with its two stacks, won't work. |
| 643 | Similar goes for the case where there is a frameless |
| 644 | function. */ |
| 645 | fi = find_frame_addr_in_frame_chain (frame); |
| 646 | } |
| 647 | else |
| 648 | fi = NULL; |
| 649 | |
| 650 | /* frame = -2 means always use selected frame. */ |
| 651 | if (type == USE_SELECTED_FRAME) |
| 652 | var->root->floating = 1; |
| 653 | |
| 654 | pc = 0; |
| 655 | block = NULL; |
| 656 | if (fi != NULL) |
| 657 | { |
| 658 | block = get_frame_block (fi, 0); |
| 659 | pc = get_frame_pc (fi); |
| 660 | } |
| 661 | |
| 662 | p = expression; |
| 663 | innermost_block = NULL; |
| 664 | /* Wrap the call to parse expression, so we can |
| 665 | return a sensible error. */ |
| 666 | TRY_CATCH (except, RETURN_MASK_ERROR) |
| 667 | { |
| 668 | var->root->exp = parse_exp_1 (&p, pc, block, 0); |
| 669 | } |
| 670 | |
| 671 | if (except.reason < 0) |
| 672 | { |
| 673 | do_cleanups (old_chain); |
| 674 | return NULL; |
| 675 | } |
| 676 | |
| 677 | /* Don't allow variables to be created for types. */ |
| 678 | if (var->root->exp->elts[0].opcode == OP_TYPE |
| 679 | || var->root->exp->elts[0].opcode == OP_TYPEOF |
| 680 | || var->root->exp->elts[0].opcode == OP_DECLTYPE) |
| 681 | { |
| 682 | do_cleanups (old_chain); |
| 683 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
| 684 | " as an expression.\n"); |
| 685 | return NULL; |
| 686 | } |
| 687 | |
| 688 | var->format = variable_default_display (var); |
| 689 | var->root->valid_block = innermost_block; |
| 690 | var->name = xstrdup (expression); |
| 691 | /* For a root var, the name and the expr are the same. */ |
| 692 | var->path_expr = xstrdup (expression); |
| 693 | |
| 694 | /* When the frame is different from the current frame, |
| 695 | we must select the appropriate frame before parsing |
| 696 | the expression, otherwise the value will not be current. |
| 697 | Since select_frame is so benign, just call it for all cases. */ |
| 698 | if (innermost_block) |
| 699 | { |
| 700 | /* User could specify explicit FRAME-ADDR which was not found but |
| 701 | EXPRESSION is frame specific and we would not be able to evaluate |
| 702 | it correctly next time. With VALID_BLOCK set we must also set |
| 703 | FRAME and THREAD_ID. */ |
| 704 | if (fi == NULL) |
| 705 | error (_("Failed to find the specified frame")); |
| 706 | |
| 707 | var->root->frame = get_frame_id (fi); |
| 708 | var->root->thread_id = pid_to_thread_id (inferior_ptid); |
| 709 | old_id = get_frame_id (get_selected_frame (NULL)); |
| 710 | select_frame (fi); |
| 711 | } |
| 712 | |
| 713 | /* We definitely need to catch errors here. |
| 714 | If evaluate_expression succeeds we got the value we wanted. |
| 715 | But if it fails, we still go on with a call to evaluate_type(). */ |
| 716 | TRY_CATCH (except, RETURN_MASK_ERROR) |
| 717 | { |
| 718 | value = evaluate_expression (var->root->exp); |
| 719 | } |
| 720 | |
| 721 | if (except.reason < 0) |
| 722 | { |
| 723 | /* Error getting the value. Try to at least get the |
| 724 | right type. */ |
| 725 | struct value *type_only_value = evaluate_type (var->root->exp); |
| 726 | |
| 727 | var->type = value_type (type_only_value); |
| 728 | } |
| 729 | else |
| 730 | { |
| 731 | int real_type_found = 0; |
| 732 | |
| 733 | var->type = value_actual_type (value, 0, &real_type_found); |
| 734 | if (real_type_found) |
| 735 | value = value_cast (var->type, value); |
| 736 | } |
| 737 | |
| 738 | /* Set language info */ |
| 739 | lang = variable_language (var); |
| 740 | var->root->lang = &languages[lang]; |
| 741 | |
| 742 | install_new_value (var, value, 1 /* Initial assignment */); |
| 743 | |
| 744 | /* Set ourselves as our root. */ |
| 745 | var->root->rootvar = var; |
| 746 | |
| 747 | /* Reset the selected frame. */ |
| 748 | if (frame_id_p (old_id)) |
| 749 | select_frame (frame_find_by_id (old_id)); |
| 750 | } |
| 751 | |
| 752 | /* If the variable object name is null, that means this |
| 753 | is a temporary variable, so don't install it. */ |
| 754 | |
| 755 | if ((var != NULL) && (objname != NULL)) |
| 756 | { |
| 757 | var->obj_name = xstrdup (objname); |
| 758 | |
| 759 | /* If a varobj name is duplicated, the install will fail so |
| 760 | we must cleanup. */ |
| 761 | if (!install_variable (var)) |
| 762 | { |
| 763 | do_cleanups (old_chain); |
| 764 | return NULL; |
| 765 | } |
| 766 | } |
| 767 | |
| 768 | discard_cleanups (old_chain); |
| 769 | return var; |
| 770 | } |
| 771 | |
| 772 | /* Generates an unique name that can be used for a varobj. */ |
| 773 | |
| 774 | char * |
| 775 | varobj_gen_name (void) |
| 776 | { |
| 777 | static int id = 0; |
| 778 | char *obj_name; |
| 779 | |
| 780 | /* Generate a name for this object. */ |
| 781 | id++; |
| 782 | obj_name = xstrprintf ("var%d", id); |
| 783 | |
| 784 | return obj_name; |
| 785 | } |
| 786 | |
| 787 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
| 788 | error if OBJNAME cannot be found. */ |
| 789 | |
| 790 | struct varobj * |
| 791 | varobj_get_handle (char *objname) |
| 792 | { |
| 793 | struct vlist *cv; |
| 794 | const char *chp; |
| 795 | unsigned int index = 0; |
| 796 | unsigned int i = 1; |
| 797 | |
| 798 | for (chp = objname; *chp; chp++) |
| 799 | { |
| 800 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; |
| 801 | } |
| 802 | |
| 803 | cv = *(varobj_table + index); |
| 804 | while ((cv != NULL) && (strcmp (cv->var->obj_name, objname) != 0)) |
| 805 | cv = cv->next; |
| 806 | |
| 807 | if (cv == NULL) |
| 808 | error (_("Variable object not found")); |
| 809 | |
| 810 | return cv->var; |
| 811 | } |
| 812 | |
| 813 | /* Given the handle, return the name of the object. */ |
| 814 | |
| 815 | char * |
| 816 | varobj_get_objname (struct varobj *var) |
| 817 | { |
| 818 | return var->obj_name; |
| 819 | } |
| 820 | |
| 821 | /* Given the handle, return the expression represented by the object. */ |
| 822 | |
| 823 | char * |
| 824 | varobj_get_expression (struct varobj *var) |
| 825 | { |
| 826 | return name_of_variable (var); |
| 827 | } |
| 828 | |
| 829 | /* Deletes a varobj and all its children if only_children == 0, |
| 830 | otherwise deletes only the children; returns a malloc'ed list of |
| 831 | all the (malloc'ed) names of the variables that have been deleted |
| 832 | (NULL terminated). */ |
| 833 | |
| 834 | int |
| 835 | varobj_delete (struct varobj *var, char ***dellist, int only_children) |
| 836 | { |
| 837 | int delcount; |
| 838 | int mycount; |
| 839 | struct cpstack *result = NULL; |
| 840 | char **cp; |
| 841 | |
| 842 | /* Initialize a stack for temporary results. */ |
| 843 | cppush (&result, NULL); |
| 844 | |
| 845 | if (only_children) |
| 846 | /* Delete only the variable children. */ |
| 847 | delcount = delete_variable (&result, var, 1 /* only the children */ ); |
| 848 | else |
| 849 | /* Delete the variable and all its children. */ |
| 850 | delcount = delete_variable (&result, var, 0 /* parent+children */ ); |
| 851 | |
| 852 | /* We may have been asked to return a list of what has been deleted. */ |
| 853 | if (dellist != NULL) |
| 854 | { |
| 855 | *dellist = xmalloc ((delcount + 1) * sizeof (char *)); |
| 856 | |
| 857 | cp = *dellist; |
| 858 | mycount = delcount; |
| 859 | *cp = cppop (&result); |
| 860 | while ((*cp != NULL) && (mycount > 0)) |
| 861 | { |
| 862 | mycount--; |
| 863 | cp++; |
| 864 | *cp = cppop (&result); |
| 865 | } |
| 866 | |
| 867 | if (mycount || (*cp != NULL)) |
| 868 | warning (_("varobj_delete: assertion failed - mycount(=%d) <> 0"), |
| 869 | mycount); |
| 870 | } |
| 871 | |
| 872 | return delcount; |
| 873 | } |
| 874 | |
| 875 | #if HAVE_PYTHON |
| 876 | |
| 877 | /* Convenience function for varobj_set_visualizer. Instantiate a |
| 878 | pretty-printer for a given value. */ |
| 879 | static PyObject * |
| 880 | instantiate_pretty_printer (PyObject *constructor, struct value *value) |
| 881 | { |
| 882 | PyObject *val_obj = NULL; |
| 883 | PyObject *printer; |
| 884 | |
| 885 | val_obj = value_to_value_object (value); |
| 886 | if (! val_obj) |
| 887 | return NULL; |
| 888 | |
| 889 | printer = PyObject_CallFunctionObjArgs (constructor, val_obj, NULL); |
| 890 | Py_DECREF (val_obj); |
| 891 | return printer; |
| 892 | } |
| 893 | |
| 894 | #endif |
| 895 | |
| 896 | /* Set/Get variable object display format. */ |
| 897 | |
| 898 | enum varobj_display_formats |
| 899 | varobj_set_display_format (struct varobj *var, |
| 900 | enum varobj_display_formats format) |
| 901 | { |
| 902 | switch (format) |
| 903 | { |
| 904 | case FORMAT_NATURAL: |
| 905 | case FORMAT_BINARY: |
| 906 | case FORMAT_DECIMAL: |
| 907 | case FORMAT_HEXADECIMAL: |
| 908 | case FORMAT_OCTAL: |
| 909 | var->format = format; |
| 910 | break; |
| 911 | |
| 912 | default: |
| 913 | var->format = variable_default_display (var); |
| 914 | } |
| 915 | |
| 916 | if (varobj_value_is_changeable_p (var) |
| 917 | && var->value && !value_lazy (var->value)) |
| 918 | { |
| 919 | xfree (var->print_value); |
| 920 | var->print_value = value_get_print_value (var->value, var->format, var); |
| 921 | } |
| 922 | |
| 923 | return var->format; |
| 924 | } |
| 925 | |
| 926 | enum varobj_display_formats |
| 927 | varobj_get_display_format (struct varobj *var) |
| 928 | { |
| 929 | return var->format; |
| 930 | } |
| 931 | |
| 932 | char * |
| 933 | varobj_get_display_hint (struct varobj *var) |
| 934 | { |
| 935 | char *result = NULL; |
| 936 | |
| 937 | #if HAVE_PYTHON |
| 938 | struct cleanup *back_to = varobj_ensure_python_env (var); |
| 939 | |
| 940 | if (var->pretty_printer) |
| 941 | result = gdbpy_get_display_hint (var->pretty_printer); |
| 942 | |
| 943 | do_cleanups (back_to); |
| 944 | #endif |
| 945 | |
| 946 | return result; |
| 947 | } |
| 948 | |
| 949 | /* Return true if the varobj has items after TO, false otherwise. */ |
| 950 | |
| 951 | int |
| 952 | varobj_has_more (struct varobj *var, int to) |
| 953 | { |
| 954 | if (VEC_length (varobj_p, var->children) > to) |
| 955 | return 1; |
| 956 | return ((to == -1 || VEC_length (varobj_p, var->children) == to) |
| 957 | && var->saved_item != NULL); |
| 958 | } |
| 959 | |
| 960 | /* If the variable object is bound to a specific thread, that |
| 961 | is its evaluation can always be done in context of a frame |
| 962 | inside that thread, returns GDB id of the thread -- which |
| 963 | is always positive. Otherwise, returns -1. */ |
| 964 | int |
| 965 | varobj_get_thread_id (struct varobj *var) |
| 966 | { |
| 967 | if (var->root->valid_block && var->root->thread_id > 0) |
| 968 | return var->root->thread_id; |
| 969 | else |
| 970 | return -1; |
| 971 | } |
| 972 | |
| 973 | void |
| 974 | varobj_set_frozen (struct varobj *var, int frozen) |
| 975 | { |
| 976 | /* When a variable is unfrozen, we don't fetch its value. |
| 977 | The 'not_fetched' flag remains set, so next -var-update |
| 978 | won't complain. |
| 979 | |
| 980 | We don't fetch the value, because for structures the client |
| 981 | should do -var-update anyway. It would be bad to have different |
| 982 | client-size logic for structure and other types. */ |
| 983 | var->frozen = frozen; |
| 984 | } |
| 985 | |
| 986 | int |
| 987 | varobj_get_frozen (struct varobj *var) |
| 988 | { |
| 989 | return var->frozen; |
| 990 | } |
| 991 | |
| 992 | /* A helper function that restricts a range to what is actually |
| 993 | available in a VEC. This follows the usual rules for the meaning |
| 994 | of FROM and TO -- if either is negative, the entire range is |
| 995 | used. */ |
| 996 | |
| 997 | static void |
| 998 | restrict_range (VEC (varobj_p) *children, int *from, int *to) |
| 999 | { |
| 1000 | if (*from < 0 || *to < 0) |
| 1001 | { |
| 1002 | *from = 0; |
| 1003 | *to = VEC_length (varobj_p, children); |
| 1004 | } |
| 1005 | else |
| 1006 | { |
| 1007 | if (*from > VEC_length (varobj_p, children)) |
| 1008 | *from = VEC_length (varobj_p, children); |
| 1009 | if (*to > VEC_length (varobj_p, children)) |
| 1010 | *to = VEC_length (varobj_p, children); |
| 1011 | if (*from > *to) |
| 1012 | *from = *to; |
| 1013 | } |
| 1014 | } |
| 1015 | |
| 1016 | #if HAVE_PYTHON |
| 1017 | |
| 1018 | /* A helper for update_dynamic_varobj_children that installs a new |
| 1019 | child when needed. */ |
| 1020 | |
| 1021 | static void |
| 1022 | install_dynamic_child (struct varobj *var, |
| 1023 | VEC (varobj_p) **changed, |
| 1024 | VEC (varobj_p) **type_changed, |
| 1025 | VEC (varobj_p) **new, |
| 1026 | VEC (varobj_p) **unchanged, |
| 1027 | int *cchanged, |
| 1028 | int index, |
| 1029 | const char *name, |
| 1030 | struct value *value) |
| 1031 | { |
| 1032 | if (VEC_length (varobj_p, var->children) < index + 1) |
| 1033 | { |
| 1034 | /* There's no child yet. */ |
| 1035 | struct varobj *child = varobj_add_child (var, name, value); |
| 1036 | |
| 1037 | if (new) |
| 1038 | { |
| 1039 | VEC_safe_push (varobj_p, *new, child); |
| 1040 | *cchanged = 1; |
| 1041 | } |
| 1042 | } |
| 1043 | else |
| 1044 | { |
| 1045 | varobj_p existing = VEC_index (varobj_p, var->children, index); |
| 1046 | |
| 1047 | int type_updated = update_type_if_necessary (existing, value); |
| 1048 | if (type_updated) |
| 1049 | { |
| 1050 | if (type_changed) |
| 1051 | VEC_safe_push (varobj_p, *type_changed, existing); |
| 1052 | } |
| 1053 | if (install_new_value (existing, value, 0)) |
| 1054 | { |
| 1055 | if (!type_updated && changed) |
| 1056 | VEC_safe_push (varobj_p, *changed, existing); |
| 1057 | } |
| 1058 | else if (!type_updated && unchanged) |
| 1059 | VEC_safe_push (varobj_p, *unchanged, existing); |
| 1060 | } |
| 1061 | } |
| 1062 | |
| 1063 | static int |
| 1064 | dynamic_varobj_has_child_method (struct varobj *var) |
| 1065 | { |
| 1066 | struct cleanup *back_to; |
| 1067 | PyObject *printer = var->pretty_printer; |
| 1068 | int result; |
| 1069 | |
| 1070 | back_to = varobj_ensure_python_env (var); |
| 1071 | result = PyObject_HasAttr (printer, gdbpy_children_cst); |
| 1072 | do_cleanups (back_to); |
| 1073 | return result; |
| 1074 | } |
| 1075 | |
| 1076 | #endif |
| 1077 | |
| 1078 | static int |
| 1079 | update_dynamic_varobj_children (struct varobj *var, |
| 1080 | VEC (varobj_p) **changed, |
| 1081 | VEC (varobj_p) **type_changed, |
| 1082 | VEC (varobj_p) **new, |
| 1083 | VEC (varobj_p) **unchanged, |
| 1084 | int *cchanged, |
| 1085 | int update_children, |
| 1086 | int from, |
| 1087 | int to) |
| 1088 | { |
| 1089 | #if HAVE_PYTHON |
| 1090 | struct cleanup *back_to; |
| 1091 | PyObject *children; |
| 1092 | int i; |
| 1093 | PyObject *printer = var->pretty_printer; |
| 1094 | |
| 1095 | back_to = varobj_ensure_python_env (var); |
| 1096 | |
| 1097 | *cchanged = 0; |
| 1098 | if (!PyObject_HasAttr (printer, gdbpy_children_cst)) |
| 1099 | { |
| 1100 | do_cleanups (back_to); |
| 1101 | return 0; |
| 1102 | } |
| 1103 | |
| 1104 | if (update_children || !var->child_iter) |
| 1105 | { |
| 1106 | children = PyObject_CallMethodObjArgs (printer, gdbpy_children_cst, |
| 1107 | NULL); |
| 1108 | |
| 1109 | if (!children) |
| 1110 | { |
| 1111 | gdbpy_print_stack (); |
| 1112 | error (_("Null value returned for children")); |
| 1113 | } |
| 1114 | |
| 1115 | make_cleanup_py_decref (children); |
| 1116 | |
| 1117 | Py_XDECREF (var->child_iter); |
| 1118 | var->child_iter = PyObject_GetIter (children); |
| 1119 | if (!var->child_iter) |
| 1120 | { |
| 1121 | gdbpy_print_stack (); |
| 1122 | error (_("Could not get children iterator")); |
| 1123 | } |
| 1124 | |
| 1125 | Py_XDECREF (var->saved_item); |
| 1126 | var->saved_item = NULL; |
| 1127 | |
| 1128 | i = 0; |
| 1129 | } |
| 1130 | else |
| 1131 | i = VEC_length (varobj_p, var->children); |
| 1132 | |
| 1133 | /* We ask for one extra child, so that MI can report whether there |
| 1134 | are more children. */ |
| 1135 | for (; to < 0 || i < to + 1; ++i) |
| 1136 | { |
| 1137 | PyObject *item; |
| 1138 | int force_done = 0; |
| 1139 | |
| 1140 | /* See if there was a leftover from last time. */ |
| 1141 | if (var->saved_item) |
| 1142 | { |
| 1143 | item = var->saved_item; |
| 1144 | var->saved_item = NULL; |
| 1145 | } |
| 1146 | else |
| 1147 | item = PyIter_Next (var->child_iter); |
| 1148 | |
| 1149 | if (!item) |
| 1150 | { |
| 1151 | /* Normal end of iteration. */ |
| 1152 | if (!PyErr_Occurred ()) |
| 1153 | break; |
| 1154 | |
| 1155 | /* If we got a memory error, just use the text as the |
| 1156 | item. */ |
| 1157 | if (PyErr_ExceptionMatches (gdbpy_gdb_memory_error)) |
| 1158 | { |
| 1159 | PyObject *type, *value, *trace; |
| 1160 | char *name_str, *value_str; |
| 1161 | |
| 1162 | PyErr_Fetch (&type, &value, &trace); |
| 1163 | value_str = gdbpy_exception_to_string (type, value); |
| 1164 | Py_XDECREF (type); |
| 1165 | Py_XDECREF (value); |
| 1166 | Py_XDECREF (trace); |
| 1167 | if (!value_str) |
| 1168 | { |
| 1169 | gdbpy_print_stack (); |
| 1170 | break; |
| 1171 | } |
| 1172 | |
| 1173 | name_str = xstrprintf ("<error at %d>", i); |
| 1174 | item = Py_BuildValue ("(ss)", name_str, value_str); |
| 1175 | xfree (name_str); |
| 1176 | xfree (value_str); |
| 1177 | if (!item) |
| 1178 | { |
| 1179 | gdbpy_print_stack (); |
| 1180 | break; |
| 1181 | } |
| 1182 | |
| 1183 | force_done = 1; |
| 1184 | } |
| 1185 | else |
| 1186 | { |
| 1187 | /* Any other kind of error. */ |
| 1188 | gdbpy_print_stack (); |
| 1189 | break; |
| 1190 | } |
| 1191 | } |
| 1192 | |
| 1193 | /* We don't want to push the extra child on any report list. */ |
| 1194 | if (to < 0 || i < to) |
| 1195 | { |
| 1196 | PyObject *py_v; |
| 1197 | const char *name; |
| 1198 | struct value *v; |
| 1199 | struct cleanup *inner; |
| 1200 | int can_mention = from < 0 || i >= from; |
| 1201 | |
| 1202 | inner = make_cleanup_py_decref (item); |
| 1203 | |
| 1204 | if (!PyArg_ParseTuple (item, "sO", &name, &py_v)) |
| 1205 | { |
| 1206 | gdbpy_print_stack (); |
| 1207 | error (_("Invalid item from the child list")); |
| 1208 | } |
| 1209 | |
| 1210 | v = convert_value_from_python (py_v); |
| 1211 | if (v == NULL) |
| 1212 | gdbpy_print_stack (); |
| 1213 | install_dynamic_child (var, can_mention ? changed : NULL, |
| 1214 | can_mention ? type_changed : NULL, |
| 1215 | can_mention ? new : NULL, |
| 1216 | can_mention ? unchanged : NULL, |
| 1217 | can_mention ? cchanged : NULL, i, name, v); |
| 1218 | do_cleanups (inner); |
| 1219 | } |
| 1220 | else |
| 1221 | { |
| 1222 | Py_XDECREF (var->saved_item); |
| 1223 | var->saved_item = item; |
| 1224 | |
| 1225 | /* We want to truncate the child list just before this |
| 1226 | element. */ |
| 1227 | break; |
| 1228 | } |
| 1229 | |
| 1230 | if (force_done) |
| 1231 | break; |
| 1232 | } |
| 1233 | |
| 1234 | if (i < VEC_length (varobj_p, var->children)) |
| 1235 | { |
| 1236 | int j; |
| 1237 | |
| 1238 | *cchanged = 1; |
| 1239 | for (j = i; j < VEC_length (varobj_p, var->children); ++j) |
| 1240 | varobj_delete (VEC_index (varobj_p, var->children, j), NULL, 0); |
| 1241 | VEC_truncate (varobj_p, var->children, i); |
| 1242 | } |
| 1243 | |
| 1244 | /* If there are fewer children than requested, note that the list of |
| 1245 | children changed. */ |
| 1246 | if (to >= 0 && VEC_length (varobj_p, var->children) < to) |
| 1247 | *cchanged = 1; |
| 1248 | |
| 1249 | var->num_children = VEC_length (varobj_p, var->children); |
| 1250 | |
| 1251 | do_cleanups (back_to); |
| 1252 | |
| 1253 | return 1; |
| 1254 | #else |
| 1255 | gdb_assert (0 && "should never be called if Python is not enabled"); |
| 1256 | #endif |
| 1257 | } |
| 1258 | |
| 1259 | int |
| 1260 | varobj_get_num_children (struct varobj *var) |
| 1261 | { |
| 1262 | if (var->num_children == -1) |
| 1263 | { |
| 1264 | if (var->pretty_printer) |
| 1265 | { |
| 1266 | int dummy; |
| 1267 | |
| 1268 | /* If we have a dynamic varobj, don't report -1 children. |
| 1269 | So, try to fetch some children first. */ |
| 1270 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, &dummy, |
| 1271 | 0, 0, 0); |
| 1272 | } |
| 1273 | else |
| 1274 | var->num_children = number_of_children (var); |
| 1275 | } |
| 1276 | |
| 1277 | return var->num_children >= 0 ? var->num_children : 0; |
| 1278 | } |
| 1279 | |
| 1280 | /* Creates a list of the immediate children of a variable object; |
| 1281 | the return code is the number of such children or -1 on error. */ |
| 1282 | |
| 1283 | VEC (varobj_p)* |
| 1284 | varobj_list_children (struct varobj *var, int *from, int *to) |
| 1285 | { |
| 1286 | char *name; |
| 1287 | int i, children_changed; |
| 1288 | |
| 1289 | var->children_requested = 1; |
| 1290 | |
| 1291 | if (var->pretty_printer) |
| 1292 | { |
| 1293 | /* This, in theory, can result in the number of children changing without |
| 1294 | frontend noticing. But well, calling -var-list-children on the same |
| 1295 | varobj twice is not something a sane frontend would do. */ |
| 1296 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, |
| 1297 | &children_changed, 0, 0, *to); |
| 1298 | restrict_range (var->children, from, to); |
| 1299 | return var->children; |
| 1300 | } |
| 1301 | |
| 1302 | if (var->num_children == -1) |
| 1303 | var->num_children = number_of_children (var); |
| 1304 | |
| 1305 | /* If that failed, give up. */ |
| 1306 | if (var->num_children == -1) |
| 1307 | return var->children; |
| 1308 | |
| 1309 | /* If we're called when the list of children is not yet initialized, |
| 1310 | allocate enough elements in it. */ |
| 1311 | while (VEC_length (varobj_p, var->children) < var->num_children) |
| 1312 | VEC_safe_push (varobj_p, var->children, NULL); |
| 1313 | |
| 1314 | for (i = 0; i < var->num_children; i++) |
| 1315 | { |
| 1316 | varobj_p existing = VEC_index (varobj_p, var->children, i); |
| 1317 | |
| 1318 | if (existing == NULL) |
| 1319 | { |
| 1320 | /* Either it's the first call to varobj_list_children for |
| 1321 | this variable object, and the child was never created, |
| 1322 | or it was explicitly deleted by the client. */ |
| 1323 | name = name_of_child (var, i); |
| 1324 | existing = create_child (var, i, name); |
| 1325 | VEC_replace (varobj_p, var->children, i, existing); |
| 1326 | } |
| 1327 | } |
| 1328 | |
| 1329 | restrict_range (var->children, from, to); |
| 1330 | return var->children; |
| 1331 | } |
| 1332 | |
| 1333 | #if HAVE_PYTHON |
| 1334 | |
| 1335 | static struct varobj * |
| 1336 | varobj_add_child (struct varobj *var, const char *name, struct value *value) |
| 1337 | { |
| 1338 | varobj_p v = create_child_with_value (var, |
| 1339 | VEC_length (varobj_p, var->children), |
| 1340 | name, value); |
| 1341 | |
| 1342 | VEC_safe_push (varobj_p, var->children, v); |
| 1343 | return v; |
| 1344 | } |
| 1345 | |
| 1346 | #endif /* HAVE_PYTHON */ |
| 1347 | |
| 1348 | /* Obtain the type of an object Variable as a string similar to the one gdb |
| 1349 | prints on the console. */ |
| 1350 | |
| 1351 | char * |
| 1352 | varobj_get_type (struct varobj *var) |
| 1353 | { |
| 1354 | /* For the "fake" variables, do not return a type. (It's type is |
| 1355 | NULL, too.) |
| 1356 | Do not return a type for invalid variables as well. */ |
| 1357 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) |
| 1358 | return NULL; |
| 1359 | |
| 1360 | return type_to_string (var->type); |
| 1361 | } |
| 1362 | |
| 1363 | /* Obtain the type of an object variable. */ |
| 1364 | |
| 1365 | struct type * |
| 1366 | varobj_get_gdb_type (struct varobj *var) |
| 1367 | { |
| 1368 | return var->type; |
| 1369 | } |
| 1370 | |
| 1371 | /* Is VAR a path expression parent, i.e., can it be used to construct |
| 1372 | a valid path expression? */ |
| 1373 | |
| 1374 | static int |
| 1375 | is_path_expr_parent (struct varobj *var) |
| 1376 | { |
| 1377 | struct type *type; |
| 1378 | |
| 1379 | /* "Fake" children are not path_expr parents. */ |
| 1380 | if (CPLUS_FAKE_CHILD (var)) |
| 1381 | return 0; |
| 1382 | |
| 1383 | type = get_value_type (var); |
| 1384 | |
| 1385 | /* Anonymous unions and structs are also not path_expr parents. */ |
| 1386 | return !((TYPE_CODE (type) == TYPE_CODE_STRUCT |
| 1387 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
| 1388 | && TYPE_NAME (type) == NULL); |
| 1389 | } |
| 1390 | |
| 1391 | /* Return the path expression parent for VAR. */ |
| 1392 | |
| 1393 | static struct varobj * |
| 1394 | get_path_expr_parent (struct varobj *var) |
| 1395 | { |
| 1396 | struct varobj *parent = var; |
| 1397 | |
| 1398 | while (!is_root_p (parent) && !is_path_expr_parent (parent)) |
| 1399 | parent = parent->parent; |
| 1400 | |
| 1401 | return parent; |
| 1402 | } |
| 1403 | |
| 1404 | /* Return a pointer to the full rooted expression of varobj VAR. |
| 1405 | If it has not been computed yet, compute it. */ |
| 1406 | char * |
| 1407 | varobj_get_path_expr (struct varobj *var) |
| 1408 | { |
| 1409 | if (var->path_expr != NULL) |
| 1410 | return var->path_expr; |
| 1411 | else |
| 1412 | { |
| 1413 | /* For root varobjs, we initialize path_expr |
| 1414 | when creating varobj, so here it should be |
| 1415 | child varobj. */ |
| 1416 | gdb_assert (!is_root_p (var)); |
| 1417 | return (*var->root->lang->path_expr_of_child) (var); |
| 1418 | } |
| 1419 | } |
| 1420 | |
| 1421 | enum varobj_languages |
| 1422 | varobj_get_language (struct varobj *var) |
| 1423 | { |
| 1424 | return variable_language (var); |
| 1425 | } |
| 1426 | |
| 1427 | int |
| 1428 | varobj_get_attributes (struct varobj *var) |
| 1429 | { |
| 1430 | int attributes = 0; |
| 1431 | |
| 1432 | if (varobj_editable_p (var)) |
| 1433 | /* FIXME: define masks for attributes. */ |
| 1434 | attributes |= 0x00000001; /* Editable */ |
| 1435 | |
| 1436 | return attributes; |
| 1437 | } |
| 1438 | |
| 1439 | int |
| 1440 | varobj_pretty_printed_p (struct varobj *var) |
| 1441 | { |
| 1442 | return var->pretty_printer != NULL; |
| 1443 | } |
| 1444 | |
| 1445 | char * |
| 1446 | varobj_get_formatted_value (struct varobj *var, |
| 1447 | enum varobj_display_formats format) |
| 1448 | { |
| 1449 | return my_value_of_variable (var, format); |
| 1450 | } |
| 1451 | |
| 1452 | char * |
| 1453 | varobj_get_value (struct varobj *var) |
| 1454 | { |
| 1455 | return my_value_of_variable (var, var->format); |
| 1456 | } |
| 1457 | |
| 1458 | /* Set the value of an object variable (if it is editable) to the |
| 1459 | value of the given expression. */ |
| 1460 | /* Note: Invokes functions that can call error(). */ |
| 1461 | |
| 1462 | int |
| 1463 | varobj_set_value (struct varobj *var, char *expression) |
| 1464 | { |
| 1465 | struct value *val = NULL; /* Initialize to keep gcc happy. */ |
| 1466 | /* The argument "expression" contains the variable's new value. |
| 1467 | We need to first construct a legal expression for this -- ugh! */ |
| 1468 | /* Does this cover all the bases? */ |
| 1469 | struct expression *exp; |
| 1470 | struct value *value = NULL; /* Initialize to keep gcc happy. */ |
| 1471 | int saved_input_radix = input_radix; |
| 1472 | char *s = expression; |
| 1473 | volatile struct gdb_exception except; |
| 1474 | |
| 1475 | gdb_assert (varobj_editable_p (var)); |
| 1476 | |
| 1477 | input_radix = 10; /* ALWAYS reset to decimal temporarily. */ |
| 1478 | exp = parse_exp_1 (&s, 0, 0, 0); |
| 1479 | TRY_CATCH (except, RETURN_MASK_ERROR) |
| 1480 | { |
| 1481 | value = evaluate_expression (exp); |
| 1482 | } |
| 1483 | |
| 1484 | if (except.reason < 0) |
| 1485 | { |
| 1486 | /* We cannot proceed without a valid expression. */ |
| 1487 | xfree (exp); |
| 1488 | return 0; |
| 1489 | } |
| 1490 | |
| 1491 | /* All types that are editable must also be changeable. */ |
| 1492 | gdb_assert (varobj_value_is_changeable_p (var)); |
| 1493 | |
| 1494 | /* The value of a changeable variable object must not be lazy. */ |
| 1495 | gdb_assert (!value_lazy (var->value)); |
| 1496 | |
| 1497 | /* Need to coerce the input. We want to check if the |
| 1498 | value of the variable object will be different |
| 1499 | after assignment, and the first thing value_assign |
| 1500 | does is coerce the input. |
| 1501 | For example, if we are assigning an array to a pointer variable we |
| 1502 | should compare the pointer with the array's address, not with the |
| 1503 | array's content. */ |
| 1504 | value = coerce_array (value); |
| 1505 | |
| 1506 | /* The new value may be lazy. value_assign, or |
| 1507 | rather value_contents, will take care of this. */ |
| 1508 | TRY_CATCH (except, RETURN_MASK_ERROR) |
| 1509 | { |
| 1510 | val = value_assign (var->value, value); |
| 1511 | } |
| 1512 | |
| 1513 | if (except.reason < 0) |
| 1514 | return 0; |
| 1515 | |
| 1516 | /* If the value has changed, record it, so that next -var-update can |
| 1517 | report this change. If a variable had a value of '1', we've set it |
| 1518 | to '333' and then set again to '1', when -var-update will report this |
| 1519 | variable as changed -- because the first assignment has set the |
| 1520 | 'updated' flag. There's no need to optimize that, because return value |
| 1521 | of -var-update should be considered an approximation. */ |
| 1522 | var->updated = install_new_value (var, val, 0 /* Compare values. */); |
| 1523 | input_radix = saved_input_radix; |
| 1524 | return 1; |
| 1525 | } |
| 1526 | |
| 1527 | #if HAVE_PYTHON |
| 1528 | |
| 1529 | /* A helper function to install a constructor function and visualizer |
| 1530 | in a varobj. */ |
| 1531 | |
| 1532 | static void |
| 1533 | install_visualizer (struct varobj *var, PyObject *constructor, |
| 1534 | PyObject *visualizer) |
| 1535 | { |
| 1536 | Py_XDECREF (var->constructor); |
| 1537 | var->constructor = constructor; |
| 1538 | |
| 1539 | Py_XDECREF (var->pretty_printer); |
| 1540 | var->pretty_printer = visualizer; |
| 1541 | |
| 1542 | Py_XDECREF (var->child_iter); |
| 1543 | var->child_iter = NULL; |
| 1544 | } |
| 1545 | |
| 1546 | /* Install the default visualizer for VAR. */ |
| 1547 | |
| 1548 | static void |
| 1549 | install_default_visualizer (struct varobj *var) |
| 1550 | { |
| 1551 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
| 1552 | if (CPLUS_FAKE_CHILD (var)) |
| 1553 | return; |
| 1554 | |
| 1555 | if (pretty_printing) |
| 1556 | { |
| 1557 | PyObject *pretty_printer = NULL; |
| 1558 | |
| 1559 | if (var->value) |
| 1560 | { |
| 1561 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value); |
| 1562 | if (! pretty_printer) |
| 1563 | { |
| 1564 | gdbpy_print_stack (); |
| 1565 | error (_("Cannot instantiate printer for default visualizer")); |
| 1566 | } |
| 1567 | } |
| 1568 | |
| 1569 | if (pretty_printer == Py_None) |
| 1570 | { |
| 1571 | Py_DECREF (pretty_printer); |
| 1572 | pretty_printer = NULL; |
| 1573 | } |
| 1574 | |
| 1575 | install_visualizer (var, NULL, pretty_printer); |
| 1576 | } |
| 1577 | } |
| 1578 | |
| 1579 | /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to |
| 1580 | make a new object. */ |
| 1581 | |
| 1582 | static void |
| 1583 | construct_visualizer (struct varobj *var, PyObject *constructor) |
| 1584 | { |
| 1585 | PyObject *pretty_printer; |
| 1586 | |
| 1587 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
| 1588 | if (CPLUS_FAKE_CHILD (var)) |
| 1589 | return; |
| 1590 | |
| 1591 | Py_INCREF (constructor); |
| 1592 | if (constructor == Py_None) |
| 1593 | pretty_printer = NULL; |
| 1594 | else |
| 1595 | { |
| 1596 | pretty_printer = instantiate_pretty_printer (constructor, var->value); |
| 1597 | if (! pretty_printer) |
| 1598 | { |
| 1599 | gdbpy_print_stack (); |
| 1600 | Py_DECREF (constructor); |
| 1601 | constructor = Py_None; |
| 1602 | Py_INCREF (constructor); |
| 1603 | } |
| 1604 | |
| 1605 | if (pretty_printer == Py_None) |
| 1606 | { |
| 1607 | Py_DECREF (pretty_printer); |
| 1608 | pretty_printer = NULL; |
| 1609 | } |
| 1610 | } |
| 1611 | |
| 1612 | install_visualizer (var, constructor, pretty_printer); |
| 1613 | } |
| 1614 | |
| 1615 | #endif /* HAVE_PYTHON */ |
| 1616 | |
| 1617 | /* A helper function for install_new_value. This creates and installs |
| 1618 | a visualizer for VAR, if appropriate. */ |
| 1619 | |
| 1620 | static void |
| 1621 | install_new_value_visualizer (struct varobj *var) |
| 1622 | { |
| 1623 | #if HAVE_PYTHON |
| 1624 | /* If the constructor is None, then we want the raw value. If VAR |
| 1625 | does not have a value, just skip this. */ |
| 1626 | if (var->constructor != Py_None && var->value) |
| 1627 | { |
| 1628 | struct cleanup *cleanup; |
| 1629 | |
| 1630 | cleanup = varobj_ensure_python_env (var); |
| 1631 | |
| 1632 | if (!var->constructor) |
| 1633 | install_default_visualizer (var); |
| 1634 | else |
| 1635 | construct_visualizer (var, var->constructor); |
| 1636 | |
| 1637 | do_cleanups (cleanup); |
| 1638 | } |
| 1639 | #else |
| 1640 | /* Do nothing. */ |
| 1641 | #endif |
| 1642 | } |
| 1643 | |
| 1644 | /* When using RTTI to determine variable type it may be changed in runtime when |
| 1645 | the variable value is changed. This function checks whether type of varobj |
| 1646 | VAR will change when a new value NEW_VALUE is assigned and if it is so |
| 1647 | updates the type of VAR. */ |
| 1648 | |
| 1649 | static int |
| 1650 | update_type_if_necessary (struct varobj *var, struct value *new_value) |
| 1651 | { |
| 1652 | if (new_value) |
| 1653 | { |
| 1654 | struct value_print_options opts; |
| 1655 | |
| 1656 | get_user_print_options (&opts); |
| 1657 | if (opts.objectprint) |
| 1658 | { |
| 1659 | struct type *new_type; |
| 1660 | char *curr_type_str, *new_type_str; |
| 1661 | |
| 1662 | new_type = value_actual_type (new_value, 0, 0); |
| 1663 | new_type_str = type_to_string (new_type); |
| 1664 | curr_type_str = varobj_get_type (var); |
| 1665 | if (strcmp (curr_type_str, new_type_str) != 0) |
| 1666 | { |
| 1667 | var->type = new_type; |
| 1668 | |
| 1669 | /* This information may be not valid for a new type. */ |
| 1670 | varobj_delete (var, NULL, 1); |
| 1671 | VEC_free (varobj_p, var->children); |
| 1672 | var->num_children = -1; |
| 1673 | return 1; |
| 1674 | } |
| 1675 | } |
| 1676 | } |
| 1677 | |
| 1678 | return 0; |
| 1679 | } |
| 1680 | |
| 1681 | /* Assign a new value to a variable object. If INITIAL is non-zero, |
| 1682 | this is the first assignement after the variable object was just |
| 1683 | created, or changed type. In that case, just assign the value |
| 1684 | and return 0. |
| 1685 | Otherwise, assign the new value, and return 1 if the value is |
| 1686 | different from the current one, 0 otherwise. The comparison is |
| 1687 | done on textual representation of value. Therefore, some types |
| 1688 | need not be compared. E.g. for structures the reported value is |
| 1689 | always "{...}", so no comparison is necessary here. If the old |
| 1690 | value was NULL and new one is not, or vice versa, we always return 1. |
| 1691 | |
| 1692 | The VALUE parameter should not be released -- the function will |
| 1693 | take care of releasing it when needed. */ |
| 1694 | static int |
| 1695 | install_new_value (struct varobj *var, struct value *value, int initial) |
| 1696 | { |
| 1697 | int changeable; |
| 1698 | int need_to_fetch; |
| 1699 | int changed = 0; |
| 1700 | int intentionally_not_fetched = 0; |
| 1701 | char *print_value = NULL; |
| 1702 | |
| 1703 | /* We need to know the varobj's type to decide if the value should |
| 1704 | be fetched or not. C++ fake children (public/protected/private) |
| 1705 | don't have a type. */ |
| 1706 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); |
| 1707 | changeable = varobj_value_is_changeable_p (var); |
| 1708 | |
| 1709 | /* If the type has custom visualizer, we consider it to be always |
| 1710 | changeable. FIXME: need to make sure this behaviour will not |
| 1711 | mess up read-sensitive values. */ |
| 1712 | if (var->pretty_printer) |
| 1713 | changeable = 1; |
| 1714 | |
| 1715 | need_to_fetch = changeable; |
| 1716 | |
| 1717 | /* We are not interested in the address of references, and given |
| 1718 | that in C++ a reference is not rebindable, it cannot |
| 1719 | meaningfully change. So, get hold of the real value. */ |
| 1720 | if (value) |
| 1721 | value = coerce_ref (value); |
| 1722 | |
| 1723 | if (var->type && TYPE_CODE (var->type) == TYPE_CODE_UNION) |
| 1724 | /* For unions, we need to fetch the value implicitly because |
| 1725 | of implementation of union member fetch. When gdb |
| 1726 | creates a value for a field and the value of the enclosing |
| 1727 | structure is not lazy, it immediately copies the necessary |
| 1728 | bytes from the enclosing values. If the enclosing value is |
| 1729 | lazy, the call to value_fetch_lazy on the field will read |
| 1730 | the data from memory. For unions, that means we'll read the |
| 1731 | same memory more than once, which is not desirable. So |
| 1732 | fetch now. */ |
| 1733 | need_to_fetch = 1; |
| 1734 | |
| 1735 | /* The new value might be lazy. If the type is changeable, |
| 1736 | that is we'll be comparing values of this type, fetch the |
| 1737 | value now. Otherwise, on the next update the old value |
| 1738 | will be lazy, which means we've lost that old value. */ |
| 1739 | if (need_to_fetch && value && value_lazy (value)) |
| 1740 | { |
| 1741 | struct varobj *parent = var->parent; |
| 1742 | int frozen = var->frozen; |
| 1743 | |
| 1744 | for (; !frozen && parent; parent = parent->parent) |
| 1745 | frozen |= parent->frozen; |
| 1746 | |
| 1747 | if (frozen && initial) |
| 1748 | { |
| 1749 | /* For variables that are frozen, or are children of frozen |
| 1750 | variables, we don't do fetch on initial assignment. |
| 1751 | For non-initial assignemnt we do the fetch, since it means we're |
| 1752 | explicitly asked to compare the new value with the old one. */ |
| 1753 | intentionally_not_fetched = 1; |
| 1754 | } |
| 1755 | else |
| 1756 | { |
| 1757 | volatile struct gdb_exception except; |
| 1758 | |
| 1759 | TRY_CATCH (except, RETURN_MASK_ERROR) |
| 1760 | { |
| 1761 | value_fetch_lazy (value); |
| 1762 | } |
| 1763 | |
| 1764 | if (except.reason < 0) |
| 1765 | { |
| 1766 | /* Set the value to NULL, so that for the next -var-update, |
| 1767 | we don't try to compare the new value with this value, |
| 1768 | that we couldn't even read. */ |
| 1769 | value = NULL; |
| 1770 | } |
| 1771 | } |
| 1772 | } |
| 1773 | |
| 1774 | /* Get a reference now, before possibly passing it to any Python |
| 1775 | code that might release it. */ |
| 1776 | if (value != NULL) |
| 1777 | value_incref (value); |
| 1778 | |
| 1779 | /* Below, we'll be comparing string rendering of old and new |
| 1780 | values. Don't get string rendering if the value is |
| 1781 | lazy -- if it is, the code above has decided that the value |
| 1782 | should not be fetched. */ |
| 1783 | if (value && !value_lazy (value) && !var->pretty_printer) |
| 1784 | print_value = value_get_print_value (value, var->format, var); |
| 1785 | |
| 1786 | /* If the type is changeable, compare the old and the new values. |
| 1787 | If this is the initial assignment, we don't have any old value |
| 1788 | to compare with. */ |
| 1789 | if (!initial && changeable) |
| 1790 | { |
| 1791 | /* If the value of the varobj was changed by -var-set-value, |
| 1792 | then the value in the varobj and in the target is the same. |
| 1793 | However, that value is different from the value that the |
| 1794 | varobj had after the previous -var-update. So need to the |
| 1795 | varobj as changed. */ |
| 1796 | if (var->updated) |
| 1797 | { |
| 1798 | changed = 1; |
| 1799 | } |
| 1800 | else if (! var->pretty_printer) |
| 1801 | { |
| 1802 | /* Try to compare the values. That requires that both |
| 1803 | values are non-lazy. */ |
| 1804 | if (var->not_fetched && value_lazy (var->value)) |
| 1805 | { |
| 1806 | /* This is a frozen varobj and the value was never read. |
| 1807 | Presumably, UI shows some "never read" indicator. |
| 1808 | Now that we've fetched the real value, we need to report |
| 1809 | this varobj as changed so that UI can show the real |
| 1810 | value. */ |
| 1811 | changed = 1; |
| 1812 | } |
| 1813 | else if (var->value == NULL && value == NULL) |
| 1814 | /* Equal. */ |
| 1815 | ; |
| 1816 | else if (var->value == NULL || value == NULL) |
| 1817 | { |
| 1818 | changed = 1; |
| 1819 | } |
| 1820 | else |
| 1821 | { |
| 1822 | gdb_assert (!value_lazy (var->value)); |
| 1823 | gdb_assert (!value_lazy (value)); |
| 1824 | |
| 1825 | gdb_assert (var->print_value != NULL && print_value != NULL); |
| 1826 | if (strcmp (var->print_value, print_value) != 0) |
| 1827 | changed = 1; |
| 1828 | } |
| 1829 | } |
| 1830 | } |
| 1831 | |
| 1832 | if (!initial && !changeable) |
| 1833 | { |
| 1834 | /* For values that are not changeable, we don't compare the values. |
| 1835 | However, we want to notice if a value was not NULL and now is NULL, |
| 1836 | or vise versa, so that we report when top-level varobjs come in scope |
| 1837 | and leave the scope. */ |
| 1838 | changed = (var->value != NULL) != (value != NULL); |
| 1839 | } |
| 1840 | |
| 1841 | /* We must always keep the new value, since children depend on it. */ |
| 1842 | if (var->value != NULL && var->value != value) |
| 1843 | value_free (var->value); |
| 1844 | var->value = value; |
| 1845 | if (value && value_lazy (value) && intentionally_not_fetched) |
| 1846 | var->not_fetched = 1; |
| 1847 | else |
| 1848 | var->not_fetched = 0; |
| 1849 | var->updated = 0; |
| 1850 | |
| 1851 | install_new_value_visualizer (var); |
| 1852 | |
| 1853 | /* If we installed a pretty-printer, re-compare the printed version |
| 1854 | to see if the variable changed. */ |
| 1855 | if (var->pretty_printer) |
| 1856 | { |
| 1857 | xfree (print_value); |
| 1858 | print_value = value_get_print_value (var->value, var->format, var); |
| 1859 | if ((var->print_value == NULL && print_value != NULL) |
| 1860 | || (var->print_value != NULL && print_value == NULL) |
| 1861 | || (var->print_value != NULL && print_value != NULL |
| 1862 | && strcmp (var->print_value, print_value) != 0)) |
| 1863 | changed = 1; |
| 1864 | } |
| 1865 | if (var->print_value) |
| 1866 | xfree (var->print_value); |
| 1867 | var->print_value = print_value; |
| 1868 | |
| 1869 | gdb_assert (!var->value || value_type (var->value)); |
| 1870 | |
| 1871 | return changed; |
| 1872 | } |
| 1873 | |
| 1874 | /* Return the requested range for a varobj. VAR is the varobj. FROM |
| 1875 | and TO are out parameters; *FROM and *TO will be set to the |
| 1876 | selected sub-range of VAR. If no range was selected using |
| 1877 | -var-set-update-range, then both will be -1. */ |
| 1878 | void |
| 1879 | varobj_get_child_range (struct varobj *var, int *from, int *to) |
| 1880 | { |
| 1881 | *from = var->from; |
| 1882 | *to = var->to; |
| 1883 | } |
| 1884 | |
| 1885 | /* Set the selected sub-range of children of VAR to start at index |
| 1886 | FROM and end at index TO. If either FROM or TO is less than zero, |
| 1887 | this is interpreted as a request for all children. */ |
| 1888 | void |
| 1889 | varobj_set_child_range (struct varobj *var, int from, int to) |
| 1890 | { |
| 1891 | var->from = from; |
| 1892 | var->to = to; |
| 1893 | } |
| 1894 | |
| 1895 | void |
| 1896 | varobj_set_visualizer (struct varobj *var, const char *visualizer) |
| 1897 | { |
| 1898 | #if HAVE_PYTHON |
| 1899 | PyObject *mainmod, *globals, *constructor; |
| 1900 | struct cleanup *back_to; |
| 1901 | |
| 1902 | back_to = varobj_ensure_python_env (var); |
| 1903 | |
| 1904 | mainmod = PyImport_AddModule ("__main__"); |
| 1905 | globals = PyModule_GetDict (mainmod); |
| 1906 | Py_INCREF (globals); |
| 1907 | make_cleanup_py_decref (globals); |
| 1908 | |
| 1909 | constructor = PyRun_String (visualizer, Py_eval_input, globals, globals); |
| 1910 | |
| 1911 | if (! constructor) |
| 1912 | { |
| 1913 | gdbpy_print_stack (); |
| 1914 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
| 1915 | } |
| 1916 | |
| 1917 | construct_visualizer (var, constructor); |
| 1918 | Py_XDECREF (constructor); |
| 1919 | |
| 1920 | /* If there are any children now, wipe them. */ |
| 1921 | varobj_delete (var, NULL, 1 /* children only */); |
| 1922 | var->num_children = -1; |
| 1923 | |
| 1924 | do_cleanups (back_to); |
| 1925 | #else |
| 1926 | error (_("Python support required")); |
| 1927 | #endif |
| 1928 | } |
| 1929 | |
| 1930 | /* If NEW_VALUE is the new value of the given varobj (var), return |
| 1931 | non-zero if var has mutated. In other words, if the type of |
| 1932 | the new value is different from the type of the varobj's old |
| 1933 | value. |
| 1934 | |
| 1935 | NEW_VALUE may be NULL, if the varobj is now out of scope. */ |
| 1936 | |
| 1937 | static int |
| 1938 | varobj_value_has_mutated (struct varobj *var, struct value *new_value, |
| 1939 | struct type *new_type) |
| 1940 | { |
| 1941 | /* If we haven't previously computed the number of children in var, |
| 1942 | it does not matter from the front-end's perspective whether |
| 1943 | the type has mutated or not. For all intents and purposes, |
| 1944 | it has not mutated. */ |
| 1945 | if (var->num_children < 0) |
| 1946 | return 0; |
| 1947 | |
| 1948 | if (var->root->lang->value_has_mutated) |
| 1949 | return var->root->lang->value_has_mutated (var, new_value, new_type); |
| 1950 | else |
| 1951 | return 0; |
| 1952 | } |
| 1953 | |
| 1954 | /* Update the values for a variable and its children. This is a |
| 1955 | two-pronged attack. First, re-parse the value for the root's |
| 1956 | expression to see if it's changed. Then go all the way |
| 1957 | through its children, reconstructing them and noting if they've |
| 1958 | changed. |
| 1959 | |
| 1960 | The EXPLICIT parameter specifies if this call is result |
| 1961 | of MI request to update this specific variable, or |
| 1962 | result of implicit -var-update *. For implicit request, we don't |
| 1963 | update frozen variables. |
| 1964 | |
| 1965 | NOTE: This function may delete the caller's varobj. If it |
| 1966 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
| 1967 | to point to the new varobj. */ |
| 1968 | |
| 1969 | VEC(varobj_update_result) * |
| 1970 | varobj_update (struct varobj **varp, int explicit) |
| 1971 | { |
| 1972 | int changed = 0; |
| 1973 | int type_changed = 0; |
| 1974 | int i; |
| 1975 | struct value *new; |
| 1976 | VEC (varobj_update_result) *stack = NULL; |
| 1977 | VEC (varobj_update_result) *result = NULL; |
| 1978 | |
| 1979 | /* Frozen means frozen -- we don't check for any change in |
| 1980 | this varobj, including its going out of scope, or |
| 1981 | changing type. One use case for frozen varobjs is |
| 1982 | retaining previously evaluated expressions, and we don't |
| 1983 | want them to be reevaluated at all. */ |
| 1984 | if (!explicit && (*varp)->frozen) |
| 1985 | return result; |
| 1986 | |
| 1987 | if (!(*varp)->root->is_valid) |
| 1988 | { |
| 1989 | varobj_update_result r = {0}; |
| 1990 | |
| 1991 | r.varobj = *varp; |
| 1992 | r.status = VAROBJ_INVALID; |
| 1993 | VEC_safe_push (varobj_update_result, result, &r); |
| 1994 | return result; |
| 1995 | } |
| 1996 | |
| 1997 | if ((*varp)->root->rootvar == *varp) |
| 1998 | { |
| 1999 | varobj_update_result r = {0}; |
| 2000 | |
| 2001 | r.varobj = *varp; |
| 2002 | r.status = VAROBJ_IN_SCOPE; |
| 2003 | |
| 2004 | /* Update the root variable. value_of_root can return NULL |
| 2005 | if the variable is no longer around, i.e. we stepped out of |
| 2006 | the frame in which a local existed. We are letting the |
| 2007 | value_of_root variable dispose of the varobj if the type |
| 2008 | has changed. */ |
| 2009 | new = value_of_root (varp, &type_changed); |
| 2010 | if (update_type_if_necessary(*varp, new)) |
| 2011 | type_changed = 1; |
| 2012 | r.varobj = *varp; |
| 2013 | r.type_changed = type_changed; |
| 2014 | if (install_new_value ((*varp), new, type_changed)) |
| 2015 | r.changed = 1; |
| 2016 | |
| 2017 | if (new == NULL) |
| 2018 | r.status = VAROBJ_NOT_IN_SCOPE; |
| 2019 | r.value_installed = 1; |
| 2020 | |
| 2021 | if (r.status == VAROBJ_NOT_IN_SCOPE) |
| 2022 | { |
| 2023 | if (r.type_changed || r.changed) |
| 2024 | VEC_safe_push (varobj_update_result, result, &r); |
| 2025 | return result; |
| 2026 | } |
| 2027 | |
| 2028 | VEC_safe_push (varobj_update_result, stack, &r); |
| 2029 | } |
| 2030 | else |
| 2031 | { |
| 2032 | varobj_update_result r = {0}; |
| 2033 | |
| 2034 | r.varobj = *varp; |
| 2035 | VEC_safe_push (varobj_update_result, stack, &r); |
| 2036 | } |
| 2037 | |
| 2038 | /* Walk through the children, reconstructing them all. */ |
| 2039 | while (!VEC_empty (varobj_update_result, stack)) |
| 2040 | { |
| 2041 | varobj_update_result r = *(VEC_last (varobj_update_result, stack)); |
| 2042 | struct varobj *v = r.varobj; |
| 2043 | |
| 2044 | VEC_pop (varobj_update_result, stack); |
| 2045 | |
| 2046 | /* Update this variable, unless it's a root, which is already |
| 2047 | updated. */ |
| 2048 | if (!r.value_installed) |
| 2049 | { |
| 2050 | struct type *new_type; |
| 2051 | |
| 2052 | new = value_of_child (v->parent, v->index); |
| 2053 | if (update_type_if_necessary(v, new)) |
| 2054 | r.type_changed = 1; |
| 2055 | if (new) |
| 2056 | new_type = value_type (new); |
| 2057 | else |
| 2058 | new_type = v->root->lang->type_of_child (v->parent, v->index); |
| 2059 | |
| 2060 | if (varobj_value_has_mutated (v, new, new_type)) |
| 2061 | { |
| 2062 | /* The children are no longer valid; delete them now. |
| 2063 | Report the fact that its type changed as well. */ |
| 2064 | varobj_delete (v, NULL, 1 /* only_children */); |
| 2065 | v->num_children = -1; |
| 2066 | v->to = -1; |
| 2067 | v->from = -1; |
| 2068 | v->type = new_type; |
| 2069 | r.type_changed = 1; |
| 2070 | } |
| 2071 | |
| 2072 | if (install_new_value (v, new, r.type_changed)) |
| 2073 | { |
| 2074 | r.changed = 1; |
| 2075 | v->updated = 0; |
| 2076 | } |
| 2077 | } |
| 2078 | |
| 2079 | /* We probably should not get children of a varobj that has a |
| 2080 | pretty-printer, but for which -var-list-children was never |
| 2081 | invoked. */ |
| 2082 | if (v->pretty_printer) |
| 2083 | { |
| 2084 | VEC (varobj_p) *changed = 0, *type_changed = 0, *unchanged = 0; |
| 2085 | VEC (varobj_p) *new = 0; |
| 2086 | int i, children_changed = 0; |
| 2087 | |
| 2088 | if (v->frozen) |
| 2089 | continue; |
| 2090 | |
| 2091 | if (!v->children_requested) |
| 2092 | { |
| 2093 | int dummy; |
| 2094 | |
| 2095 | /* If we initially did not have potential children, but |
| 2096 | now we do, consider the varobj as changed. |
| 2097 | Otherwise, if children were never requested, consider |
| 2098 | it as unchanged -- presumably, such varobj is not yet |
| 2099 | expanded in the UI, so we need not bother getting |
| 2100 | it. */ |
| 2101 | if (!varobj_has_more (v, 0)) |
| 2102 | { |
| 2103 | update_dynamic_varobj_children (v, NULL, NULL, NULL, NULL, |
| 2104 | &dummy, 0, 0, 0); |
| 2105 | if (varobj_has_more (v, 0)) |
| 2106 | r.changed = 1; |
| 2107 | } |
| 2108 | |
| 2109 | if (r.changed) |
| 2110 | VEC_safe_push (varobj_update_result, result, &r); |
| 2111 | |
| 2112 | continue; |
| 2113 | } |
| 2114 | |
| 2115 | /* If update_dynamic_varobj_children returns 0, then we have |
| 2116 | a non-conforming pretty-printer, so we skip it. */ |
| 2117 | if (update_dynamic_varobj_children (v, &changed, &type_changed, &new, |
| 2118 | &unchanged, &children_changed, 1, |
| 2119 | v->from, v->to)) |
| 2120 | { |
| 2121 | if (children_changed || new) |
| 2122 | { |
| 2123 | r.children_changed = 1; |
| 2124 | r.new = new; |
| 2125 | } |
| 2126 | /* Push in reverse order so that the first child is |
| 2127 | popped from the work stack first, and so will be |
| 2128 | added to result first. This does not affect |
| 2129 | correctness, just "nicer". */ |
| 2130 | for (i = VEC_length (varobj_p, type_changed) - 1; i >= 0; --i) |
| 2131 | { |
| 2132 | varobj_p tmp = VEC_index (varobj_p, type_changed, i); |
| 2133 | varobj_update_result r = {0}; |
| 2134 | |
| 2135 | /* Type may change only if value was changed. */ |
| 2136 | r.varobj = tmp; |
| 2137 | r.changed = 1; |
| 2138 | r.type_changed = 1; |
| 2139 | r.value_installed = 1; |
| 2140 | VEC_safe_push (varobj_update_result, stack, &r); |
| 2141 | } |
| 2142 | for (i = VEC_length (varobj_p, changed) - 1; i >= 0; --i) |
| 2143 | { |
| 2144 | varobj_p tmp = VEC_index (varobj_p, changed, i); |
| 2145 | varobj_update_result r = {0}; |
| 2146 | |
| 2147 | r.varobj = tmp; |
| 2148 | r.changed = 1; |
| 2149 | r.value_installed = 1; |
| 2150 | VEC_safe_push (varobj_update_result, stack, &r); |
| 2151 | } |
| 2152 | for (i = VEC_length (varobj_p, unchanged) - 1; i >= 0; --i) |
| 2153 | { |
| 2154 | varobj_p tmp = VEC_index (varobj_p, unchanged, i); |
| 2155 | |
| 2156 | if (!tmp->frozen) |
| 2157 | { |
| 2158 | varobj_update_result r = {0}; |
| 2159 | |
| 2160 | r.varobj = tmp; |
| 2161 | r.value_installed = 1; |
| 2162 | VEC_safe_push (varobj_update_result, stack, &r); |
| 2163 | } |
| 2164 | } |
| 2165 | if (r.changed || r.children_changed) |
| 2166 | VEC_safe_push (varobj_update_result, result, &r); |
| 2167 | |
| 2168 | /* Free CHANGED, TYPE_CHANGED and UNCHANGED, but not NEW, |
| 2169 | because NEW has been put into the result vector. */ |
| 2170 | VEC_free (varobj_p, changed); |
| 2171 | VEC_free (varobj_p, type_changed); |
| 2172 | VEC_free (varobj_p, unchanged); |
| 2173 | |
| 2174 | continue; |
| 2175 | } |
| 2176 | } |
| 2177 | |
| 2178 | /* Push any children. Use reverse order so that the first |
| 2179 | child is popped from the work stack first, and so |
| 2180 | will be added to result first. This does not |
| 2181 | affect correctness, just "nicer". */ |
| 2182 | for (i = VEC_length (varobj_p, v->children)-1; i >= 0; --i) |
| 2183 | { |
| 2184 | varobj_p c = VEC_index (varobj_p, v->children, i); |
| 2185 | |
| 2186 | /* Child may be NULL if explicitly deleted by -var-delete. */ |
| 2187 | if (c != NULL && !c->frozen) |
| 2188 | { |
| 2189 | varobj_update_result r = {0}; |
| 2190 | |
| 2191 | r.varobj = c; |
| 2192 | VEC_safe_push (varobj_update_result, stack, &r); |
| 2193 | } |
| 2194 | } |
| 2195 | |
| 2196 | if (r.changed || r.type_changed) |
| 2197 | VEC_safe_push (varobj_update_result, result, &r); |
| 2198 | } |
| 2199 | |
| 2200 | VEC_free (varobj_update_result, stack); |
| 2201 | |
| 2202 | return result; |
| 2203 | } |
| 2204 | \f |
| 2205 | |
| 2206 | /* Helper functions */ |
| 2207 | |
| 2208 | /* |
| 2209 | * Variable object construction/destruction |
| 2210 | */ |
| 2211 | |
| 2212 | static int |
| 2213 | delete_variable (struct cpstack **resultp, struct varobj *var, |
| 2214 | int only_children_p) |
| 2215 | { |
| 2216 | int delcount = 0; |
| 2217 | |
| 2218 | delete_variable_1 (resultp, &delcount, var, |
| 2219 | only_children_p, 1 /* remove_from_parent_p */ ); |
| 2220 | |
| 2221 | return delcount; |
| 2222 | } |
| 2223 | |
| 2224 | /* Delete the variable object VAR and its children. */ |
| 2225 | /* IMPORTANT NOTE: If we delete a variable which is a child |
| 2226 | and the parent is not removed we dump core. It must be always |
| 2227 | initially called with remove_from_parent_p set. */ |
| 2228 | static void |
| 2229 | delete_variable_1 (struct cpstack **resultp, int *delcountp, |
| 2230 | struct varobj *var, int only_children_p, |
| 2231 | int remove_from_parent_p) |
| 2232 | { |
| 2233 | int i; |
| 2234 | |
| 2235 | /* Delete any children of this variable, too. */ |
| 2236 | for (i = 0; i < VEC_length (varobj_p, var->children); ++i) |
| 2237 | { |
| 2238 | varobj_p child = VEC_index (varobj_p, var->children, i); |
| 2239 | |
| 2240 | if (!child) |
| 2241 | continue; |
| 2242 | if (!remove_from_parent_p) |
| 2243 | child->parent = NULL; |
| 2244 | delete_variable_1 (resultp, delcountp, child, 0, only_children_p); |
| 2245 | } |
| 2246 | VEC_free (varobj_p, var->children); |
| 2247 | |
| 2248 | /* if we were called to delete only the children we are done here. */ |
| 2249 | if (only_children_p) |
| 2250 | return; |
| 2251 | |
| 2252 | /* Otherwise, add it to the list of deleted ones and proceed to do so. */ |
| 2253 | /* If the name is null, this is a temporary variable, that has not |
| 2254 | yet been installed, don't report it, it belongs to the caller... */ |
| 2255 | if (var->obj_name != NULL) |
| 2256 | { |
| 2257 | cppush (resultp, xstrdup (var->obj_name)); |
| 2258 | *delcountp = *delcountp + 1; |
| 2259 | } |
| 2260 | |
| 2261 | /* If this variable has a parent, remove it from its parent's list. */ |
| 2262 | /* OPTIMIZATION: if the parent of this variable is also being deleted, |
| 2263 | (as indicated by remove_from_parent_p) we don't bother doing an |
| 2264 | expensive list search to find the element to remove when we are |
| 2265 | discarding the list afterwards. */ |
| 2266 | if ((remove_from_parent_p) && (var->parent != NULL)) |
| 2267 | { |
| 2268 | VEC_replace (varobj_p, var->parent->children, var->index, NULL); |
| 2269 | } |
| 2270 | |
| 2271 | if (var->obj_name != NULL) |
| 2272 | uninstall_variable (var); |
| 2273 | |
| 2274 | /* Free memory associated with this variable. */ |
| 2275 | free_variable (var); |
| 2276 | } |
| 2277 | |
| 2278 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ |
| 2279 | static int |
| 2280 | install_variable (struct varobj *var) |
| 2281 | { |
| 2282 | struct vlist *cv; |
| 2283 | struct vlist *newvl; |
| 2284 | const char *chp; |
| 2285 | unsigned int index = 0; |
| 2286 | unsigned int i = 1; |
| 2287 | |
| 2288 | for (chp = var->obj_name; *chp; chp++) |
| 2289 | { |
| 2290 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; |
| 2291 | } |
| 2292 | |
| 2293 | cv = *(varobj_table + index); |
| 2294 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) |
| 2295 | cv = cv->next; |
| 2296 | |
| 2297 | if (cv != NULL) |
| 2298 | error (_("Duplicate variable object name")); |
| 2299 | |
| 2300 | /* Add varobj to hash table. */ |
| 2301 | newvl = xmalloc (sizeof (struct vlist)); |
| 2302 | newvl->next = *(varobj_table + index); |
| 2303 | newvl->var = var; |
| 2304 | *(varobj_table + index) = newvl; |
| 2305 | |
| 2306 | /* If root, add varobj to root list. */ |
| 2307 | if (is_root_p (var)) |
| 2308 | { |
| 2309 | /* Add to list of root variables. */ |
| 2310 | if (rootlist == NULL) |
| 2311 | var->root->next = NULL; |
| 2312 | else |
| 2313 | var->root->next = rootlist; |
| 2314 | rootlist = var->root; |
| 2315 | } |
| 2316 | |
| 2317 | return 1; /* OK */ |
| 2318 | } |
| 2319 | |
| 2320 | /* Unistall the object VAR. */ |
| 2321 | static void |
| 2322 | uninstall_variable (struct varobj *var) |
| 2323 | { |
| 2324 | struct vlist *cv; |
| 2325 | struct vlist *prev; |
| 2326 | struct varobj_root *cr; |
| 2327 | struct varobj_root *prer; |
| 2328 | const char *chp; |
| 2329 | unsigned int index = 0; |
| 2330 | unsigned int i = 1; |
| 2331 | |
| 2332 | /* Remove varobj from hash table. */ |
| 2333 | for (chp = var->obj_name; *chp; chp++) |
| 2334 | { |
| 2335 | index = (index + (i++ * (unsigned int) *chp)) % VAROBJ_TABLE_SIZE; |
| 2336 | } |
| 2337 | |
| 2338 | cv = *(varobj_table + index); |
| 2339 | prev = NULL; |
| 2340 | while ((cv != NULL) && (strcmp (cv->var->obj_name, var->obj_name) != 0)) |
| 2341 | { |
| 2342 | prev = cv; |
| 2343 | cv = cv->next; |
| 2344 | } |
| 2345 | |
| 2346 | if (varobjdebug) |
| 2347 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name); |
| 2348 | |
| 2349 | if (cv == NULL) |
| 2350 | { |
| 2351 | warning |
| 2352 | ("Assertion failed: Could not find variable object \"%s\" to delete", |
| 2353 | var->obj_name); |
| 2354 | return; |
| 2355 | } |
| 2356 | |
| 2357 | if (prev == NULL) |
| 2358 | *(varobj_table + index) = cv->next; |
| 2359 | else |
| 2360 | prev->next = cv->next; |
| 2361 | |
| 2362 | xfree (cv); |
| 2363 | |
| 2364 | /* If root, remove varobj from root list. */ |
| 2365 | if (is_root_p (var)) |
| 2366 | { |
| 2367 | /* Remove from list of root variables. */ |
| 2368 | if (rootlist == var->root) |
| 2369 | rootlist = var->root->next; |
| 2370 | else |
| 2371 | { |
| 2372 | prer = NULL; |
| 2373 | cr = rootlist; |
| 2374 | while ((cr != NULL) && (cr->rootvar != var)) |
| 2375 | { |
| 2376 | prer = cr; |
| 2377 | cr = cr->next; |
| 2378 | } |
| 2379 | if (cr == NULL) |
| 2380 | { |
| 2381 | warning (_("Assertion failed: Could not find " |
| 2382 | "varobj \"%s\" in root list"), |
| 2383 | var->obj_name); |
| 2384 | return; |
| 2385 | } |
| 2386 | if (prer == NULL) |
| 2387 | rootlist = NULL; |
| 2388 | else |
| 2389 | prer->next = cr->next; |
| 2390 | } |
| 2391 | } |
| 2392 | |
| 2393 | } |
| 2394 | |
| 2395 | /* Create and install a child of the parent of the given name. */ |
| 2396 | static struct varobj * |
| 2397 | create_child (struct varobj *parent, int index, char *name) |
| 2398 | { |
| 2399 | return create_child_with_value (parent, index, name, |
| 2400 | value_of_child (parent, index)); |
| 2401 | } |
| 2402 | |
| 2403 | /* Does CHILD represent a child with no name? This happens when |
| 2404 | the child is an anonmous struct or union and it has no field name |
| 2405 | in its parent variable. |
| 2406 | |
| 2407 | This has already been determined by *_describe_child. The easiest |
| 2408 | thing to do is to compare the child's name with ANONYMOUS_*_NAME. */ |
| 2409 | |
| 2410 | static int |
| 2411 | is_anonymous_child (struct varobj *child) |
| 2412 | { |
| 2413 | return (strcmp (child->name, ANONYMOUS_STRUCT_NAME) == 0 |
| 2414 | || strcmp (child->name, ANONYMOUS_UNION_NAME) == 0); |
| 2415 | } |
| 2416 | |
| 2417 | static struct varobj * |
| 2418 | create_child_with_value (struct varobj *parent, int index, const char *name, |
| 2419 | struct value *value) |
| 2420 | { |
| 2421 | struct varobj *child; |
| 2422 | char *childs_name; |
| 2423 | |
| 2424 | child = new_variable (); |
| 2425 | |
| 2426 | /* Name is allocated by name_of_child. */ |
| 2427 | /* FIXME: xstrdup should not be here. */ |
| 2428 | child->name = xstrdup (name); |
| 2429 | child->index = index; |
| 2430 | child->parent = parent; |
| 2431 | child->root = parent->root; |
| 2432 | |
| 2433 | if (is_anonymous_child (child)) |
| 2434 | childs_name = xstrprintf ("%s.%d_anonymous", parent->obj_name, index); |
| 2435 | else |
| 2436 | childs_name = xstrprintf ("%s.%s", parent->obj_name, name); |
| 2437 | child->obj_name = childs_name; |
| 2438 | |
| 2439 | install_variable (child); |
| 2440 | |
| 2441 | /* Compute the type of the child. Must do this before |
| 2442 | calling install_new_value. */ |
| 2443 | if (value != NULL) |
| 2444 | /* If the child had no evaluation errors, var->value |
| 2445 | will be non-NULL and contain a valid type. */ |
| 2446 | child->type = value_actual_type (value, 0, NULL); |
| 2447 | else |
| 2448 | /* Otherwise, we must compute the type. */ |
| 2449 | child->type = (*child->root->lang->type_of_child) (child->parent, |
| 2450 | child->index); |
| 2451 | install_new_value (child, value, 1); |
| 2452 | |
| 2453 | return child; |
| 2454 | } |
| 2455 | \f |
| 2456 | |
| 2457 | /* |
| 2458 | * Miscellaneous utility functions. |
| 2459 | */ |
| 2460 | |
| 2461 | /* Allocate memory and initialize a new variable. */ |
| 2462 | static struct varobj * |
| 2463 | new_variable (void) |
| 2464 | { |
| 2465 | struct varobj *var; |
| 2466 | |
| 2467 | var = (struct varobj *) xmalloc (sizeof (struct varobj)); |
| 2468 | var->name = NULL; |
| 2469 | var->path_expr = NULL; |
| 2470 | var->obj_name = NULL; |
| 2471 | var->index = -1; |
| 2472 | var->type = NULL; |
| 2473 | var->value = NULL; |
| 2474 | var->num_children = -1; |
| 2475 | var->parent = NULL; |
| 2476 | var->children = NULL; |
| 2477 | var->format = 0; |
| 2478 | var->root = NULL; |
| 2479 | var->updated = 0; |
| 2480 | var->print_value = NULL; |
| 2481 | var->frozen = 0; |
| 2482 | var->not_fetched = 0; |
| 2483 | var->children_requested = 0; |
| 2484 | var->from = -1; |
| 2485 | var->to = -1; |
| 2486 | var->constructor = 0; |
| 2487 | var->pretty_printer = 0; |
| 2488 | var->child_iter = 0; |
| 2489 | var->saved_item = 0; |
| 2490 | |
| 2491 | return var; |
| 2492 | } |
| 2493 | |
| 2494 | /* Allocate memory and initialize a new root variable. */ |
| 2495 | static struct varobj * |
| 2496 | new_root_variable (void) |
| 2497 | { |
| 2498 | struct varobj *var = new_variable (); |
| 2499 | |
| 2500 | var->root = (struct varobj_root *) xmalloc (sizeof (struct varobj_root)); |
| 2501 | var->root->lang = NULL; |
| 2502 | var->root->exp = NULL; |
| 2503 | var->root->valid_block = NULL; |
| 2504 | var->root->frame = null_frame_id; |
| 2505 | var->root->floating = 0; |
| 2506 | var->root->rootvar = NULL; |
| 2507 | var->root->is_valid = 1; |
| 2508 | |
| 2509 | return var; |
| 2510 | } |
| 2511 | |
| 2512 | /* Free any allocated memory associated with VAR. */ |
| 2513 | static void |
| 2514 | free_variable (struct varobj *var) |
| 2515 | { |
| 2516 | #if HAVE_PYTHON |
| 2517 | if (var->pretty_printer) |
| 2518 | { |
| 2519 | struct cleanup *cleanup = varobj_ensure_python_env (var); |
| 2520 | Py_XDECREF (var->constructor); |
| 2521 | Py_XDECREF (var->pretty_printer); |
| 2522 | Py_XDECREF (var->child_iter); |
| 2523 | Py_XDECREF (var->saved_item); |
| 2524 | do_cleanups (cleanup); |
| 2525 | } |
| 2526 | #endif |
| 2527 | |
| 2528 | value_free (var->value); |
| 2529 | |
| 2530 | /* Free the expression if this is a root variable. */ |
| 2531 | if (is_root_p (var)) |
| 2532 | { |
| 2533 | xfree (var->root->exp); |
| 2534 | xfree (var->root); |
| 2535 | } |
| 2536 | |
| 2537 | xfree (var->name); |
| 2538 | xfree (var->obj_name); |
| 2539 | xfree (var->print_value); |
| 2540 | xfree (var->path_expr); |
| 2541 | xfree (var); |
| 2542 | } |
| 2543 | |
| 2544 | static void |
| 2545 | do_free_variable_cleanup (void *var) |
| 2546 | { |
| 2547 | free_variable (var); |
| 2548 | } |
| 2549 | |
| 2550 | static struct cleanup * |
| 2551 | make_cleanup_free_variable (struct varobj *var) |
| 2552 | { |
| 2553 | return make_cleanup (do_free_variable_cleanup, var); |
| 2554 | } |
| 2555 | |
| 2556 | /* This returns the type of the variable. It also skips past typedefs |
| 2557 | to return the real type of the variable. |
| 2558 | |
| 2559 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file |
| 2560 | except within get_target_type and get_type. */ |
| 2561 | static struct type * |
| 2562 | get_type (struct varobj *var) |
| 2563 | { |
| 2564 | struct type *type; |
| 2565 | |
| 2566 | type = var->type; |
| 2567 | if (type != NULL) |
| 2568 | type = check_typedef (type); |
| 2569 | |
| 2570 | return type; |
| 2571 | } |
| 2572 | |
| 2573 | /* Return the type of the value that's stored in VAR, |
| 2574 | or that would have being stored there if the |
| 2575 | value were accessible. |
| 2576 | |
| 2577 | This differs from VAR->type in that VAR->type is always |
| 2578 | the true type of the expession in the source language. |
| 2579 | The return value of this function is the type we're |
| 2580 | actually storing in varobj, and using for displaying |
| 2581 | the values and for comparing previous and new values. |
| 2582 | |
| 2583 | For example, top-level references are always stripped. */ |
| 2584 | static struct type * |
| 2585 | get_value_type (struct varobj *var) |
| 2586 | { |
| 2587 | struct type *type; |
| 2588 | |
| 2589 | if (var->value) |
| 2590 | type = value_type (var->value); |
| 2591 | else |
| 2592 | type = var->type; |
| 2593 | |
| 2594 | type = check_typedef (type); |
| 2595 | |
| 2596 | if (TYPE_CODE (type) == TYPE_CODE_REF) |
| 2597 | type = get_target_type (type); |
| 2598 | |
| 2599 | type = check_typedef (type); |
| 2600 | |
| 2601 | return type; |
| 2602 | } |
| 2603 | |
| 2604 | /* This returns the target type (or NULL) of TYPE, also skipping |
| 2605 | past typedefs, just like get_type (). |
| 2606 | |
| 2607 | NOTE: TYPE_TARGET_TYPE should NOT be used anywhere in this file |
| 2608 | except within get_target_type and get_type. */ |
| 2609 | static struct type * |
| 2610 | get_target_type (struct type *type) |
| 2611 | { |
| 2612 | if (type != NULL) |
| 2613 | { |
| 2614 | type = TYPE_TARGET_TYPE (type); |
| 2615 | if (type != NULL) |
| 2616 | type = check_typedef (type); |
| 2617 | } |
| 2618 | |
| 2619 | return type; |
| 2620 | } |
| 2621 | |
| 2622 | /* What is the default display for this variable? We assume that |
| 2623 | everything is "natural". Any exceptions? */ |
| 2624 | static enum varobj_display_formats |
| 2625 | variable_default_display (struct varobj *var) |
| 2626 | { |
| 2627 | return FORMAT_NATURAL; |
| 2628 | } |
| 2629 | |
| 2630 | /* FIXME: The following should be generic for any pointer. */ |
| 2631 | static void |
| 2632 | cppush (struct cpstack **pstack, char *name) |
| 2633 | { |
| 2634 | struct cpstack *s; |
| 2635 | |
| 2636 | s = (struct cpstack *) xmalloc (sizeof (struct cpstack)); |
| 2637 | s->name = name; |
| 2638 | s->next = *pstack; |
| 2639 | *pstack = s; |
| 2640 | } |
| 2641 | |
| 2642 | /* FIXME: The following should be generic for any pointer. */ |
| 2643 | static char * |
| 2644 | cppop (struct cpstack **pstack) |
| 2645 | { |
| 2646 | struct cpstack *s; |
| 2647 | char *v; |
| 2648 | |
| 2649 | if ((*pstack)->name == NULL && (*pstack)->next == NULL) |
| 2650 | return NULL; |
| 2651 | |
| 2652 | s = *pstack; |
| 2653 | v = s->name; |
| 2654 | *pstack = (*pstack)->next; |
| 2655 | xfree (s); |
| 2656 | |
| 2657 | return v; |
| 2658 | } |
| 2659 | \f |
| 2660 | /* |
| 2661 | * Language-dependencies |
| 2662 | */ |
| 2663 | |
| 2664 | /* Common entry points */ |
| 2665 | |
| 2666 | /* Get the language of variable VAR. */ |
| 2667 | static enum varobj_languages |
| 2668 | variable_language (struct varobj *var) |
| 2669 | { |
| 2670 | enum varobj_languages lang; |
| 2671 | |
| 2672 | switch (var->root->exp->language_defn->la_language) |
| 2673 | { |
| 2674 | default: |
| 2675 | case language_c: |
| 2676 | lang = vlang_c; |
| 2677 | break; |
| 2678 | case language_cplus: |
| 2679 | lang = vlang_cplus; |
| 2680 | break; |
| 2681 | case language_java: |
| 2682 | lang = vlang_java; |
| 2683 | break; |
| 2684 | case language_ada: |
| 2685 | lang = vlang_ada; |
| 2686 | break; |
| 2687 | } |
| 2688 | |
| 2689 | return lang; |
| 2690 | } |
| 2691 | |
| 2692 | /* Return the number of children for a given variable. |
| 2693 | The result of this function is defined by the language |
| 2694 | implementation. The number of children returned by this function |
| 2695 | is the number of children that the user will see in the variable |
| 2696 | display. */ |
| 2697 | static int |
| 2698 | number_of_children (struct varobj *var) |
| 2699 | { |
| 2700 | return (*var->root->lang->number_of_children) (var); |
| 2701 | } |
| 2702 | |
| 2703 | /* What is the expression for the root varobj VAR? Returns a malloc'd |
| 2704 | string. */ |
| 2705 | static char * |
| 2706 | name_of_variable (struct varobj *var) |
| 2707 | { |
| 2708 | return (*var->root->lang->name_of_variable) (var); |
| 2709 | } |
| 2710 | |
| 2711 | /* What is the name of the INDEX'th child of VAR? Returns a malloc'd |
| 2712 | string. */ |
| 2713 | static char * |
| 2714 | name_of_child (struct varobj *var, int index) |
| 2715 | { |
| 2716 | return (*var->root->lang->name_of_child) (var, index); |
| 2717 | } |
| 2718 | |
| 2719 | /* What is the ``struct value *'' of the root variable VAR? |
| 2720 | For floating variable object, evaluation can get us a value |
| 2721 | of different type from what is stored in varobj already. In |
| 2722 | that case: |
| 2723 | - *type_changed will be set to 1 |
| 2724 | - old varobj will be freed, and new one will be |
| 2725 | created, with the same name. |
| 2726 | - *var_handle will be set to the new varobj |
| 2727 | Otherwise, *type_changed will be set to 0. */ |
| 2728 | static struct value * |
| 2729 | value_of_root (struct varobj **var_handle, int *type_changed) |
| 2730 | { |
| 2731 | struct varobj *var; |
| 2732 | |
| 2733 | if (var_handle == NULL) |
| 2734 | return NULL; |
| 2735 | |
| 2736 | var = *var_handle; |
| 2737 | |
| 2738 | /* This should really be an exception, since this should |
| 2739 | only get called with a root variable. */ |
| 2740 | |
| 2741 | if (!is_root_p (var)) |
| 2742 | return NULL; |
| 2743 | |
| 2744 | if (var->root->floating) |
| 2745 | { |
| 2746 | struct varobj *tmp_var; |
| 2747 | char *old_type, *new_type; |
| 2748 | |
| 2749 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
| 2750 | USE_SELECTED_FRAME); |
| 2751 | if (tmp_var == NULL) |
| 2752 | { |
| 2753 | return NULL; |
| 2754 | } |
| 2755 | old_type = varobj_get_type (var); |
| 2756 | new_type = varobj_get_type (tmp_var); |
| 2757 | if (strcmp (old_type, new_type) == 0) |
| 2758 | { |
| 2759 | /* The expression presently stored inside var->root->exp |
| 2760 | remembers the locations of local variables relatively to |
| 2761 | the frame where the expression was created (in DWARF location |
| 2762 | button, for example). Naturally, those locations are not |
| 2763 | correct in other frames, so update the expression. */ |
| 2764 | |
| 2765 | struct expression *tmp_exp = var->root->exp; |
| 2766 | |
| 2767 | var->root->exp = tmp_var->root->exp; |
| 2768 | tmp_var->root->exp = tmp_exp; |
| 2769 | |
| 2770 | varobj_delete (tmp_var, NULL, 0); |
| 2771 | *type_changed = 0; |
| 2772 | } |
| 2773 | else |
| 2774 | { |
| 2775 | tmp_var->obj_name = xstrdup (var->obj_name); |
| 2776 | tmp_var->from = var->from; |
| 2777 | tmp_var->to = var->to; |
| 2778 | varobj_delete (var, NULL, 0); |
| 2779 | |
| 2780 | install_variable (tmp_var); |
| 2781 | *var_handle = tmp_var; |
| 2782 | var = *var_handle; |
| 2783 | *type_changed = 1; |
| 2784 | } |
| 2785 | xfree (old_type); |
| 2786 | xfree (new_type); |
| 2787 | } |
| 2788 | else |
| 2789 | { |
| 2790 | *type_changed = 0; |
| 2791 | } |
| 2792 | |
| 2793 | { |
| 2794 | struct value *value; |
| 2795 | |
| 2796 | value = (*var->root->lang->value_of_root) (var_handle); |
| 2797 | if (var->value == NULL || value == NULL) |
| 2798 | { |
| 2799 | /* For root varobj-s, a NULL value indicates a scoping issue. |
| 2800 | So, nothing to do in terms of checking for mutations. */ |
| 2801 | } |
| 2802 | else if (varobj_value_has_mutated (var, value, value_type (value))) |
| 2803 | { |
| 2804 | /* The type has mutated, so the children are no longer valid. |
| 2805 | Just delete them, and tell our caller that the type has |
| 2806 | changed. */ |
| 2807 | varobj_delete (var, NULL, 1 /* only_children */); |
| 2808 | var->num_children = -1; |
| 2809 | var->to = -1; |
| 2810 | var->from = -1; |
| 2811 | *type_changed = 1; |
| 2812 | } |
| 2813 | return value; |
| 2814 | } |
| 2815 | } |
| 2816 | |
| 2817 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
| 2818 | static struct value * |
| 2819 | value_of_child (struct varobj *parent, int index) |
| 2820 | { |
| 2821 | struct value *value; |
| 2822 | |
| 2823 | value = (*parent->root->lang->value_of_child) (parent, index); |
| 2824 | |
| 2825 | return value; |
| 2826 | } |
| 2827 | |
| 2828 | /* GDB already has a command called "value_of_variable". Sigh. */ |
| 2829 | static char * |
| 2830 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
| 2831 | { |
| 2832 | if (var->root->is_valid) |
| 2833 | { |
| 2834 | if (var->pretty_printer) |
| 2835 | return value_get_print_value (var->value, var->format, var); |
| 2836 | return (*var->root->lang->value_of_variable) (var, format); |
| 2837 | } |
| 2838 | else |
| 2839 | return NULL; |
| 2840 | } |
| 2841 | |
| 2842 | static char * |
| 2843 | value_get_print_value (struct value *value, enum varobj_display_formats format, |
| 2844 | struct varobj *var) |
| 2845 | { |
| 2846 | struct ui_file *stb; |
| 2847 | struct cleanup *old_chain; |
| 2848 | gdb_byte *thevalue = NULL; |
| 2849 | struct value_print_options opts; |
| 2850 | struct type *type = NULL; |
| 2851 | long len = 0; |
| 2852 | char *encoding = NULL; |
| 2853 | struct gdbarch *gdbarch = NULL; |
| 2854 | /* Initialize it just to avoid a GCC false warning. */ |
| 2855 | CORE_ADDR str_addr = 0; |
| 2856 | int string_print = 0; |
| 2857 | |
| 2858 | if (value == NULL) |
| 2859 | return NULL; |
| 2860 | |
| 2861 | stb = mem_fileopen (); |
| 2862 | old_chain = make_cleanup_ui_file_delete (stb); |
| 2863 | |
| 2864 | gdbarch = get_type_arch (value_type (value)); |
| 2865 | #if HAVE_PYTHON |
| 2866 | { |
| 2867 | PyObject *value_formatter = var->pretty_printer; |
| 2868 | |
| 2869 | varobj_ensure_python_env (var); |
| 2870 | |
| 2871 | if (value_formatter) |
| 2872 | { |
| 2873 | /* First check to see if we have any children at all. If so, |
| 2874 | we simply return {...}. */ |
| 2875 | if (dynamic_varobj_has_child_method (var)) |
| 2876 | { |
| 2877 | do_cleanups (old_chain); |
| 2878 | return xstrdup ("{...}"); |
| 2879 | } |
| 2880 | |
| 2881 | if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst)) |
| 2882 | { |
| 2883 | struct value *replacement; |
| 2884 | PyObject *output = NULL; |
| 2885 | |
| 2886 | output = apply_varobj_pretty_printer (value_formatter, |
| 2887 | &replacement, |
| 2888 | stb); |
| 2889 | |
| 2890 | /* If we have string like output ... */ |
| 2891 | if (output) |
| 2892 | { |
| 2893 | make_cleanup_py_decref (output); |
| 2894 | |
| 2895 | /* If this is a lazy string, extract it. For lazy |
| 2896 | strings we always print as a string, so set |
| 2897 | string_print. */ |
| 2898 | if (gdbpy_is_lazy_string (output)) |
| 2899 | { |
| 2900 | gdbpy_extract_lazy_string (output, &str_addr, &type, |
| 2901 | &len, &encoding); |
| 2902 | make_cleanup (free_current_contents, &encoding); |
| 2903 | string_print = 1; |
| 2904 | } |
| 2905 | else |
| 2906 | { |
| 2907 | /* If it is a regular (non-lazy) string, extract |
| 2908 | it and copy the contents into THEVALUE. If the |
| 2909 | hint says to print it as a string, set |
| 2910 | string_print. Otherwise just return the extracted |
| 2911 | string as a value. */ |
| 2912 | |
| 2913 | char *s = python_string_to_target_string (output); |
| 2914 | |
| 2915 | if (s) |
| 2916 | { |
| 2917 | char *hint; |
| 2918 | |
| 2919 | hint = gdbpy_get_display_hint (value_formatter); |
| 2920 | if (hint) |
| 2921 | { |
| 2922 | if (!strcmp (hint, "string")) |
| 2923 | string_print = 1; |
| 2924 | xfree (hint); |
| 2925 | } |
| 2926 | |
| 2927 | len = strlen (s); |
| 2928 | thevalue = xmemdup (s, len + 1, len + 1); |
| 2929 | type = builtin_type (gdbarch)->builtin_char; |
| 2930 | xfree (s); |
| 2931 | |
| 2932 | if (!string_print) |
| 2933 | { |
| 2934 | do_cleanups (old_chain); |
| 2935 | return thevalue; |
| 2936 | } |
| 2937 | |
| 2938 | make_cleanup (xfree, thevalue); |
| 2939 | } |
| 2940 | else |
| 2941 | gdbpy_print_stack (); |
| 2942 | } |
| 2943 | } |
| 2944 | /* If the printer returned a replacement value, set VALUE |
| 2945 | to REPLACEMENT. If there is not a replacement value, |
| 2946 | just use the value passed to this function. */ |
| 2947 | if (replacement) |
| 2948 | value = replacement; |
| 2949 | } |
| 2950 | } |
| 2951 | } |
| 2952 | #endif |
| 2953 | |
| 2954 | get_formatted_print_options (&opts, format_code[(int) format]); |
| 2955 | opts.deref_ref = 0; |
| 2956 | opts.raw = 1; |
| 2957 | |
| 2958 | /* If the THEVALUE has contents, it is a regular string. */ |
| 2959 | if (thevalue) |
| 2960 | LA_PRINT_STRING (stb, type, thevalue, len, encoding, 0, &opts); |
| 2961 | else if (string_print) |
| 2962 | /* Otherwise, if string_print is set, and it is not a regular |
| 2963 | string, it is a lazy string. */ |
| 2964 | val_print_string (type, encoding, str_addr, len, stb, &opts); |
| 2965 | else |
| 2966 | /* All other cases. */ |
| 2967 | common_val_print (value, stb, 0, &opts, current_language); |
| 2968 | |
| 2969 | thevalue = ui_file_xstrdup (stb, NULL); |
| 2970 | |
| 2971 | do_cleanups (old_chain); |
| 2972 | return thevalue; |
| 2973 | } |
| 2974 | |
| 2975 | int |
| 2976 | varobj_editable_p (struct varobj *var) |
| 2977 | { |
| 2978 | struct type *type; |
| 2979 | |
| 2980 | if (!(var->root->is_valid && var->value && VALUE_LVAL (var->value))) |
| 2981 | return 0; |
| 2982 | |
| 2983 | type = get_value_type (var); |
| 2984 | |
| 2985 | switch (TYPE_CODE (type)) |
| 2986 | { |
| 2987 | case TYPE_CODE_STRUCT: |
| 2988 | case TYPE_CODE_UNION: |
| 2989 | case TYPE_CODE_ARRAY: |
| 2990 | case TYPE_CODE_FUNC: |
| 2991 | case TYPE_CODE_METHOD: |
| 2992 | return 0; |
| 2993 | break; |
| 2994 | |
| 2995 | default: |
| 2996 | return 1; |
| 2997 | break; |
| 2998 | } |
| 2999 | } |
| 3000 | |
| 3001 | /* Call VAR's value_is_changeable_p language-specific callback. */ |
| 3002 | |
| 3003 | static int |
| 3004 | varobj_value_is_changeable_p (struct varobj *var) |
| 3005 | { |
| 3006 | return var->root->lang->value_is_changeable_p (var); |
| 3007 | } |
| 3008 | |
| 3009 | /* Return 1 if that varobj is floating, that is is always evaluated in the |
| 3010 | selected frame, and not bound to thread/frame. Such variable objects |
| 3011 | are created using '@' as frame specifier to -var-create. */ |
| 3012 | int |
| 3013 | varobj_floating_p (struct varobj *var) |
| 3014 | { |
| 3015 | return var->root->floating; |
| 3016 | } |
| 3017 | |
| 3018 | /* Given the value and the type of a variable object, |
| 3019 | adjust the value and type to those necessary |
| 3020 | for getting children of the variable object. |
| 3021 | This includes dereferencing top-level references |
| 3022 | to all types and dereferencing pointers to |
| 3023 | structures. |
| 3024 | |
| 3025 | If LOOKUP_ACTUAL_TYPE is set the enclosing type of the |
| 3026 | value will be fetched and if it differs from static type |
| 3027 | the value will be casted to it. |
| 3028 | |
| 3029 | Both TYPE and *TYPE should be non-null. VALUE |
| 3030 | can be null if we want to only translate type. |
| 3031 | *VALUE can be null as well -- if the parent |
| 3032 | value is not known. |
| 3033 | |
| 3034 | If WAS_PTR is not NULL, set *WAS_PTR to 0 or 1 |
| 3035 | depending on whether pointer was dereferenced |
| 3036 | in this function. */ |
| 3037 | static void |
| 3038 | adjust_value_for_child_access (struct value **value, |
| 3039 | struct type **type, |
| 3040 | int *was_ptr, |
| 3041 | int lookup_actual_type) |
| 3042 | { |
| 3043 | gdb_assert (type && *type); |
| 3044 | |
| 3045 | if (was_ptr) |
| 3046 | *was_ptr = 0; |
| 3047 | |
| 3048 | *type = check_typedef (*type); |
| 3049 | |
| 3050 | /* The type of value stored in varobj, that is passed |
| 3051 | to us, is already supposed to be |
| 3052 | reference-stripped. */ |
| 3053 | |
| 3054 | gdb_assert (TYPE_CODE (*type) != TYPE_CODE_REF); |
| 3055 | |
| 3056 | /* Pointers to structures are treated just like |
| 3057 | structures when accessing children. Don't |
| 3058 | dererences pointers to other types. */ |
| 3059 | if (TYPE_CODE (*type) == TYPE_CODE_PTR) |
| 3060 | { |
| 3061 | struct type *target_type = get_target_type (*type); |
| 3062 | if (TYPE_CODE (target_type) == TYPE_CODE_STRUCT |
| 3063 | || TYPE_CODE (target_type) == TYPE_CODE_UNION) |
| 3064 | { |
| 3065 | if (value && *value) |
| 3066 | { |
| 3067 | volatile struct gdb_exception except; |
| 3068 | |
| 3069 | TRY_CATCH (except, RETURN_MASK_ERROR) |
| 3070 | { |
| 3071 | *value = value_ind (*value); |
| 3072 | } |
| 3073 | |
| 3074 | if (except.reason < 0) |
| 3075 | *value = NULL; |
| 3076 | } |
| 3077 | *type = target_type; |
| 3078 | if (was_ptr) |
| 3079 | *was_ptr = 1; |
| 3080 | } |
| 3081 | } |
| 3082 | |
| 3083 | /* The 'get_target_type' function calls check_typedef on |
| 3084 | result, so we can immediately check type code. No |
| 3085 | need to call check_typedef here. */ |
| 3086 | |
| 3087 | /* Access a real type of the value (if necessary and possible). */ |
| 3088 | if (value && *value && lookup_actual_type) |
| 3089 | { |
| 3090 | struct type *enclosing_type; |
| 3091 | int real_type_found = 0; |
| 3092 | |
| 3093 | enclosing_type = value_actual_type (*value, 1, &real_type_found); |
| 3094 | if (real_type_found) |
| 3095 | { |
| 3096 | *type = enclosing_type; |
| 3097 | *value = value_cast (enclosing_type, *value); |
| 3098 | } |
| 3099 | } |
| 3100 | } |
| 3101 | |
| 3102 | /* Implement the "value_is_changeable_p" varobj callback for most |
| 3103 | languages. */ |
| 3104 | |
| 3105 | static int |
| 3106 | default_value_is_changeable_p (struct varobj *var) |
| 3107 | { |
| 3108 | int r; |
| 3109 | struct type *type; |
| 3110 | |
| 3111 | if (CPLUS_FAKE_CHILD (var)) |
| 3112 | return 0; |
| 3113 | |
| 3114 | type = get_value_type (var); |
| 3115 | |
| 3116 | switch (TYPE_CODE (type)) |
| 3117 | { |
| 3118 | case TYPE_CODE_STRUCT: |
| 3119 | case TYPE_CODE_UNION: |
| 3120 | case TYPE_CODE_ARRAY: |
| 3121 | r = 0; |
| 3122 | break; |
| 3123 | |
| 3124 | default: |
| 3125 | r = 1; |
| 3126 | } |
| 3127 | |
| 3128 | return r; |
| 3129 | } |
| 3130 | |
| 3131 | /* C */ |
| 3132 | |
| 3133 | static int |
| 3134 | c_number_of_children (struct varobj *var) |
| 3135 | { |
| 3136 | struct type *type = get_value_type (var); |
| 3137 | int children = 0; |
| 3138 | struct type *target; |
| 3139 | |
| 3140 | adjust_value_for_child_access (NULL, &type, NULL, 0); |
| 3141 | target = get_target_type (type); |
| 3142 | |
| 3143 | switch (TYPE_CODE (type)) |
| 3144 | { |
| 3145 | case TYPE_CODE_ARRAY: |
| 3146 | if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (target) > 0 |
| 3147 | && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type)) |
| 3148 | children = TYPE_LENGTH (type) / TYPE_LENGTH (target); |
| 3149 | else |
| 3150 | /* If we don't know how many elements there are, don't display |
| 3151 | any. */ |
| 3152 | children = 0; |
| 3153 | break; |
| 3154 | |
| 3155 | case TYPE_CODE_STRUCT: |
| 3156 | case TYPE_CODE_UNION: |
| 3157 | children = TYPE_NFIELDS (type); |
| 3158 | break; |
| 3159 | |
| 3160 | case TYPE_CODE_PTR: |
| 3161 | /* The type here is a pointer to non-struct. Typically, pointers |
| 3162 | have one child, except for function ptrs, which have no children, |
| 3163 | and except for void*, as we don't know what to show. |
| 3164 | |
| 3165 | We can show char* so we allow it to be dereferenced. If you decide |
| 3166 | to test for it, please mind that a little magic is necessary to |
| 3167 | properly identify it: char* has TYPE_CODE == TYPE_CODE_INT and |
| 3168 | TYPE_NAME == "char". */ |
| 3169 | if (TYPE_CODE (target) == TYPE_CODE_FUNC |
| 3170 | || TYPE_CODE (target) == TYPE_CODE_VOID) |
| 3171 | children = 0; |
| 3172 | else |
| 3173 | children = 1; |
| 3174 | break; |
| 3175 | |
| 3176 | default: |
| 3177 | /* Other types have no children. */ |
| 3178 | break; |
| 3179 | } |
| 3180 | |
| 3181 | return children; |
| 3182 | } |
| 3183 | |
| 3184 | static char * |
| 3185 | c_name_of_variable (struct varobj *parent) |
| 3186 | { |
| 3187 | return xstrdup (parent->name); |
| 3188 | } |
| 3189 | |
| 3190 | /* Return the value of element TYPE_INDEX of a structure |
| 3191 | value VALUE. VALUE's type should be a structure, |
| 3192 | or union, or a typedef to struct/union. |
| 3193 | |
| 3194 | Returns NULL if getting the value fails. Never throws. */ |
| 3195 | static struct value * |
| 3196 | value_struct_element_index (struct value *value, int type_index) |
| 3197 | { |
| 3198 | struct value *result = NULL; |
| 3199 | volatile struct gdb_exception e; |
| 3200 | struct type *type = value_type (value); |
| 3201 | |
| 3202 | type = check_typedef (type); |
| 3203 | |
| 3204 | gdb_assert (TYPE_CODE (type) == TYPE_CODE_STRUCT |
| 3205 | || TYPE_CODE (type) == TYPE_CODE_UNION); |
| 3206 | |
| 3207 | TRY_CATCH (e, RETURN_MASK_ERROR) |
| 3208 | { |
| 3209 | if (field_is_static (&TYPE_FIELD (type, type_index))) |
| 3210 | result = value_static_field (type, type_index); |
| 3211 | else |
| 3212 | result = value_primitive_field (value, 0, type_index, type); |
| 3213 | } |
| 3214 | if (e.reason < 0) |
| 3215 | { |
| 3216 | return NULL; |
| 3217 | } |
| 3218 | else |
| 3219 | { |
| 3220 | return result; |
| 3221 | } |
| 3222 | } |
| 3223 | |
| 3224 | /* Obtain the information about child INDEX of the variable |
| 3225 | object PARENT. |
| 3226 | If CNAME is not null, sets *CNAME to the name of the child relative |
| 3227 | to the parent. |
| 3228 | If CVALUE is not null, sets *CVALUE to the value of the child. |
| 3229 | If CTYPE is not null, sets *CTYPE to the type of the child. |
| 3230 | |
| 3231 | If any of CNAME, CVALUE, or CTYPE is not null, but the corresponding |
| 3232 | information cannot be determined, set *CNAME, *CVALUE, or *CTYPE |
| 3233 | to NULL. */ |
| 3234 | static void |
| 3235 | c_describe_child (struct varobj *parent, int index, |
| 3236 | char **cname, struct value **cvalue, struct type **ctype, |
| 3237 | char **cfull_expression) |
| 3238 | { |
| 3239 | struct value *value = parent->value; |
| 3240 | struct type *type = get_value_type (parent); |
| 3241 | char *parent_expression = NULL; |
| 3242 | int was_ptr; |
| 3243 | volatile struct gdb_exception except; |
| 3244 | |
| 3245 | if (cname) |
| 3246 | *cname = NULL; |
| 3247 | if (cvalue) |
| 3248 | *cvalue = NULL; |
| 3249 | if (ctype) |
| 3250 | *ctype = NULL; |
| 3251 | if (cfull_expression) |
| 3252 | { |
| 3253 | *cfull_expression = NULL; |
| 3254 | parent_expression = varobj_get_path_expr (get_path_expr_parent (parent)); |
| 3255 | } |
| 3256 | adjust_value_for_child_access (&value, &type, &was_ptr, 0); |
| 3257 | |
| 3258 | switch (TYPE_CODE (type)) |
| 3259 | { |
| 3260 | case TYPE_CODE_ARRAY: |
| 3261 | if (cname) |
| 3262 | *cname |
| 3263 | = xstrdup (int_string (index |
| 3264 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)), |
| 3265 | 10, 1, 0, 0)); |
| 3266 | |
| 3267 | if (cvalue && value) |
| 3268 | { |
| 3269 | int real_index = index + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)); |
| 3270 | |
| 3271 | TRY_CATCH (except, RETURN_MASK_ERROR) |
| 3272 | { |
| 3273 | *cvalue = value_subscript (value, real_index); |
| 3274 | } |
| 3275 | } |
| 3276 | |
| 3277 | if (ctype) |
| 3278 | *ctype = get_target_type (type); |
| 3279 | |
| 3280 | if (cfull_expression) |
| 3281 | *cfull_expression = |
| 3282 | xstrprintf ("(%s)[%s]", parent_expression, |
| 3283 | int_string (index |
| 3284 | + TYPE_LOW_BOUND (TYPE_INDEX_TYPE (type)), |
| 3285 | 10, 1, 0, 0)); |
| 3286 | |
| 3287 | |
| 3288 | break; |
| 3289 | |
| 3290 | case TYPE_CODE_STRUCT: |
| 3291 | case TYPE_CODE_UNION: |
| 3292 | { |
| 3293 | const char *field_name; |
| 3294 | |
| 3295 | /* If the type is anonymous and the field has no name, |
| 3296 | set an appropriate name. */ |
| 3297 | field_name = TYPE_FIELD_NAME (type, index); |
| 3298 | if (field_name == NULL || *field_name == '\0') |
| 3299 | { |
| 3300 | if (cname) |
| 3301 | { |
| 3302 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, index)) |
| 3303 | == TYPE_CODE_STRUCT) |
| 3304 | *cname = xstrdup (ANONYMOUS_STRUCT_NAME); |
| 3305 | else |
| 3306 | *cname = xstrdup (ANONYMOUS_UNION_NAME); |
| 3307 | } |
| 3308 | |
| 3309 | if (cfull_expression) |
| 3310 | *cfull_expression = xstrdup (""); |
| 3311 | } |
| 3312 | else |
| 3313 | { |
| 3314 | if (cname) |
| 3315 | *cname = xstrdup (field_name); |
| 3316 | |
| 3317 | if (cfull_expression) |
| 3318 | { |
| 3319 | char *join = was_ptr ? "->" : "."; |
| 3320 | |
| 3321 | *cfull_expression = xstrprintf ("(%s)%s%s", parent_expression, |
| 3322 | join, field_name); |
| 3323 | } |
| 3324 | } |
| 3325 | |
| 3326 | if (cvalue && value) |
| 3327 | { |
| 3328 | /* For C, varobj index is the same as type index. */ |
| 3329 | *cvalue = value_struct_element_index (value, index); |
| 3330 | } |
| 3331 | |
| 3332 | if (ctype) |
| 3333 | *ctype = TYPE_FIELD_TYPE (type, index); |
| 3334 | } |
| 3335 | break; |
| 3336 | |
| 3337 | case TYPE_CODE_PTR: |
| 3338 | if (cname) |
| 3339 | *cname = xstrprintf ("*%s", parent->name); |
| 3340 | |
| 3341 | if (cvalue && value) |
| 3342 | { |
| 3343 | TRY_CATCH (except, RETURN_MASK_ERROR) |
| 3344 | { |
| 3345 | *cvalue = value_ind (value); |
| 3346 | } |
| 3347 | |
| 3348 | if (except.reason < 0) |
| 3349 | *cvalue = NULL; |
| 3350 | } |
| 3351 | |
| 3352 | /* Don't use get_target_type because it calls |
| 3353 | check_typedef and here, we want to show the true |
| 3354 | declared type of the variable. */ |
| 3355 | if (ctype) |
| 3356 | *ctype = TYPE_TARGET_TYPE (type); |
| 3357 | |
| 3358 | if (cfull_expression) |
| 3359 | *cfull_expression = xstrprintf ("*(%s)", parent_expression); |
| 3360 | |
| 3361 | break; |
| 3362 | |
| 3363 | default: |
| 3364 | /* This should not happen. */ |
| 3365 | if (cname) |
| 3366 | *cname = xstrdup ("???"); |
| 3367 | if (cfull_expression) |
| 3368 | *cfull_expression = xstrdup ("???"); |
| 3369 | /* Don't set value and type, we don't know then. */ |
| 3370 | } |
| 3371 | } |
| 3372 | |
| 3373 | static char * |
| 3374 | c_name_of_child (struct varobj *parent, int index) |
| 3375 | { |
| 3376 | char *name; |
| 3377 | |
| 3378 | c_describe_child (parent, index, &name, NULL, NULL, NULL); |
| 3379 | return name; |
| 3380 | } |
| 3381 | |
| 3382 | static char * |
| 3383 | c_path_expr_of_child (struct varobj *child) |
| 3384 | { |
| 3385 | c_describe_child (child->parent, child->index, NULL, NULL, NULL, |
| 3386 | &child->path_expr); |
| 3387 | return child->path_expr; |
| 3388 | } |
| 3389 | |
| 3390 | /* If frame associated with VAR can be found, switch |
| 3391 | to it and return 1. Otherwise, return 0. */ |
| 3392 | static int |
| 3393 | check_scope (struct varobj *var) |
| 3394 | { |
| 3395 | struct frame_info *fi; |
| 3396 | int scope; |
| 3397 | |
| 3398 | fi = frame_find_by_id (var->root->frame); |
| 3399 | scope = fi != NULL; |
| 3400 | |
| 3401 | if (fi) |
| 3402 | { |
| 3403 | CORE_ADDR pc = get_frame_pc (fi); |
| 3404 | |
| 3405 | if (pc < BLOCK_START (var->root->valid_block) || |
| 3406 | pc >= BLOCK_END (var->root->valid_block)) |
| 3407 | scope = 0; |
| 3408 | else |
| 3409 | select_frame (fi); |
| 3410 | } |
| 3411 | return scope; |
| 3412 | } |
| 3413 | |
| 3414 | static struct value * |
| 3415 | c_value_of_root (struct varobj **var_handle) |
| 3416 | { |
| 3417 | struct value *new_val = NULL; |
| 3418 | struct varobj *var = *var_handle; |
| 3419 | int within_scope = 0; |
| 3420 | struct cleanup *back_to; |
| 3421 | |
| 3422 | /* Only root variables can be updated... */ |
| 3423 | if (!is_root_p (var)) |
| 3424 | /* Not a root var. */ |
| 3425 | return NULL; |
| 3426 | |
| 3427 | back_to = make_cleanup_restore_current_thread (); |
| 3428 | |
| 3429 | /* Determine whether the variable is still around. */ |
| 3430 | if (var->root->valid_block == NULL || var->root->floating) |
| 3431 | within_scope = 1; |
| 3432 | else if (var->root->thread_id == 0) |
| 3433 | { |
| 3434 | /* The program was single-threaded when the variable object was |
| 3435 | created. Technically, it's possible that the program became |
| 3436 | multi-threaded since then, but we don't support such |
| 3437 | scenario yet. */ |
| 3438 | within_scope = check_scope (var); |
| 3439 | } |
| 3440 | else |
| 3441 | { |
| 3442 | ptid_t ptid = thread_id_to_pid (var->root->thread_id); |
| 3443 | if (in_thread_list (ptid)) |
| 3444 | { |
| 3445 | switch_to_thread (ptid); |
| 3446 | within_scope = check_scope (var); |
| 3447 | } |
| 3448 | } |
| 3449 | |
| 3450 | if (within_scope) |
| 3451 | { |
| 3452 | volatile struct gdb_exception except; |
| 3453 | |
| 3454 | /* We need to catch errors here, because if evaluate |
| 3455 | expression fails we want to just return NULL. */ |
| 3456 | TRY_CATCH (except, RETURN_MASK_ERROR) |
| 3457 | { |
| 3458 | new_val = evaluate_expression (var->root->exp); |
| 3459 | } |
| 3460 | |
| 3461 | return new_val; |
| 3462 | } |
| 3463 | |
| 3464 | do_cleanups (back_to); |
| 3465 | |
| 3466 | return NULL; |
| 3467 | } |
| 3468 | |
| 3469 | static struct value * |
| 3470 | c_value_of_child (struct varobj *parent, int index) |
| 3471 | { |
| 3472 | struct value *value = NULL; |
| 3473 | |
| 3474 | c_describe_child (parent, index, NULL, &value, NULL, NULL); |
| 3475 | return value; |
| 3476 | } |
| 3477 | |
| 3478 | static struct type * |
| 3479 | c_type_of_child (struct varobj *parent, int index) |
| 3480 | { |
| 3481 | struct type *type = NULL; |
| 3482 | |
| 3483 | c_describe_child (parent, index, NULL, NULL, &type, NULL); |
| 3484 | return type; |
| 3485 | } |
| 3486 | |
| 3487 | static char * |
| 3488 | c_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
| 3489 | { |
| 3490 | /* BOGUS: if val_print sees a struct/class, or a reference to one, |
| 3491 | it will print out its children instead of "{...}". So we need to |
| 3492 | catch that case explicitly. */ |
| 3493 | struct type *type = get_type (var); |
| 3494 | |
| 3495 | /* Strip top-level references. */ |
| 3496 | while (TYPE_CODE (type) == TYPE_CODE_REF) |
| 3497 | type = check_typedef (TYPE_TARGET_TYPE (type)); |
| 3498 | |
| 3499 | switch (TYPE_CODE (type)) |
| 3500 | { |
| 3501 | case TYPE_CODE_STRUCT: |
| 3502 | case TYPE_CODE_UNION: |
| 3503 | return xstrdup ("{...}"); |
| 3504 | /* break; */ |
| 3505 | |
| 3506 | case TYPE_CODE_ARRAY: |
| 3507 | { |
| 3508 | char *number; |
| 3509 | |
| 3510 | number = xstrprintf ("[%d]", var->num_children); |
| 3511 | return (number); |
| 3512 | } |
| 3513 | /* break; */ |
| 3514 | |
| 3515 | default: |
| 3516 | { |
| 3517 | if (var->value == NULL) |
| 3518 | { |
| 3519 | /* This can happen if we attempt to get the value of a struct |
| 3520 | member when the parent is an invalid pointer. This is an |
| 3521 | error condition, so we should tell the caller. */ |
| 3522 | return NULL; |
| 3523 | } |
| 3524 | else |
| 3525 | { |
| 3526 | if (var->not_fetched && value_lazy (var->value)) |
| 3527 | /* Frozen variable and no value yet. We don't |
| 3528 | implicitly fetch the value. MI response will |
| 3529 | use empty string for the value, which is OK. */ |
| 3530 | return NULL; |
| 3531 | |
| 3532 | gdb_assert (varobj_value_is_changeable_p (var)); |
| 3533 | gdb_assert (!value_lazy (var->value)); |
| 3534 | |
| 3535 | /* If the specified format is the current one, |
| 3536 | we can reuse print_value. */ |
| 3537 | if (format == var->format) |
| 3538 | return xstrdup (var->print_value); |
| 3539 | else |
| 3540 | return value_get_print_value (var->value, format, var); |
| 3541 | } |
| 3542 | } |
| 3543 | } |
| 3544 | } |
| 3545 | \f |
| 3546 | |
| 3547 | /* C++ */ |
| 3548 | |
| 3549 | static int |
| 3550 | cplus_number_of_children (struct varobj *var) |
| 3551 | { |
| 3552 | struct value *value = NULL; |
| 3553 | struct type *type; |
| 3554 | int children, dont_know; |
| 3555 | int lookup_actual_type = 0; |
| 3556 | struct value_print_options opts; |
| 3557 | |
| 3558 | dont_know = 1; |
| 3559 | children = 0; |
| 3560 | |
| 3561 | get_user_print_options (&opts); |
| 3562 | |
| 3563 | if (!CPLUS_FAKE_CHILD (var)) |
| 3564 | { |
| 3565 | type = get_value_type (var); |
| 3566 | |
| 3567 | /* It is necessary to access a real type (via RTTI). */ |
| 3568 | if (opts.objectprint) |
| 3569 | { |
| 3570 | value = var->value; |
| 3571 | lookup_actual_type = (TYPE_CODE (var->type) == TYPE_CODE_REF |
| 3572 | || TYPE_CODE (var->type) == TYPE_CODE_PTR); |
| 3573 | } |
| 3574 | adjust_value_for_child_access (&value, &type, NULL, lookup_actual_type); |
| 3575 | |
| 3576 | if (((TYPE_CODE (type)) == TYPE_CODE_STRUCT) || |
| 3577 | ((TYPE_CODE (type)) == TYPE_CODE_UNION)) |
| 3578 | { |
| 3579 | int kids[3]; |
| 3580 | |
| 3581 | cplus_class_num_children (type, kids); |
| 3582 | if (kids[v_public] != 0) |
| 3583 | children++; |
| 3584 | if (kids[v_private] != 0) |
| 3585 | children++; |
| 3586 | if (kids[v_protected] != 0) |
| 3587 | children++; |
| 3588 | |
| 3589 | /* Add any baseclasses. */ |
| 3590 | children += TYPE_N_BASECLASSES (type); |
| 3591 | dont_know = 0; |
| 3592 | |
| 3593 | /* FIXME: save children in var. */ |
| 3594 | } |
| 3595 | } |
| 3596 | else |
| 3597 | { |
| 3598 | int kids[3]; |
| 3599 | |
| 3600 | type = get_value_type (var->parent); |
| 3601 | |
| 3602 | /* It is necessary to access a real type (via RTTI). */ |
| 3603 | if (opts.objectprint) |
| 3604 | { |
| 3605 | struct varobj *parent = var->parent; |
| 3606 | |
| 3607 | value = parent->value; |
| 3608 | lookup_actual_type = (TYPE_CODE (parent->type) == TYPE_CODE_REF |
| 3609 | || TYPE_CODE (parent->type) == TYPE_CODE_PTR); |
| 3610 | } |
| 3611 | adjust_value_for_child_access (&value, &type, NULL, lookup_actual_type); |
| 3612 | |
| 3613 | cplus_class_num_children (type, kids); |
| 3614 | if (strcmp (var->name, "public") == 0) |
| 3615 | children = kids[v_public]; |
| 3616 | else if (strcmp (var->name, "private") == 0) |
| 3617 | children = kids[v_private]; |
| 3618 | else |
| 3619 | children = kids[v_protected]; |
| 3620 | dont_know = 0; |
| 3621 | } |
| 3622 | |
| 3623 | if (dont_know) |
| 3624 | children = c_number_of_children (var); |
| 3625 | |
| 3626 | return children; |
| 3627 | } |
| 3628 | |
| 3629 | /* Compute # of public, private, and protected variables in this class. |
| 3630 | That means we need to descend into all baseclasses and find out |
| 3631 | how many are there, too. */ |
| 3632 | static void |
| 3633 | cplus_class_num_children (struct type *type, int children[3]) |
| 3634 | { |
| 3635 | int i, vptr_fieldno; |
| 3636 | struct type *basetype = NULL; |
| 3637 | |
| 3638 | children[v_public] = 0; |
| 3639 | children[v_private] = 0; |
| 3640 | children[v_protected] = 0; |
| 3641 | |
| 3642 | vptr_fieldno = get_vptr_fieldno (type, &basetype); |
| 3643 | for (i = TYPE_N_BASECLASSES (type); i < TYPE_NFIELDS (type); i++) |
| 3644 | { |
| 3645 | /* If we have a virtual table pointer, omit it. Even if virtual |
| 3646 | table pointers are not specifically marked in the debug info, |
| 3647 | they should be artificial. */ |
| 3648 | if ((type == basetype && i == vptr_fieldno) |
| 3649 | || TYPE_FIELD_ARTIFICIAL (type, i)) |
| 3650 | continue; |
| 3651 | |
| 3652 | if (TYPE_FIELD_PROTECTED (type, i)) |
| 3653 | children[v_protected]++; |
| 3654 | else if (TYPE_FIELD_PRIVATE (type, i)) |
| 3655 | children[v_private]++; |
| 3656 | else |
| 3657 | children[v_public]++; |
| 3658 | } |
| 3659 | } |
| 3660 | |
| 3661 | static char * |
| 3662 | cplus_name_of_variable (struct varobj *parent) |
| 3663 | { |
| 3664 | return c_name_of_variable (parent); |
| 3665 | } |
| 3666 | |
| 3667 | enum accessibility { private_field, protected_field, public_field }; |
| 3668 | |
| 3669 | /* Check if field INDEX of TYPE has the specified accessibility. |
| 3670 | Return 0 if so and 1 otherwise. */ |
| 3671 | static int |
| 3672 | match_accessibility (struct type *type, int index, enum accessibility acc) |
| 3673 | { |
| 3674 | if (acc == private_field && TYPE_FIELD_PRIVATE (type, index)) |
| 3675 | return 1; |
| 3676 | else if (acc == protected_field && TYPE_FIELD_PROTECTED (type, index)) |
| 3677 | return 1; |
| 3678 | else if (acc == public_field && !TYPE_FIELD_PRIVATE (type, index) |
| 3679 | && !TYPE_FIELD_PROTECTED (type, index)) |
| 3680 | return 1; |
| 3681 | else |
| 3682 | return 0; |
| 3683 | } |
| 3684 | |
| 3685 | static void |
| 3686 | cplus_describe_child (struct varobj *parent, int index, |
| 3687 | char **cname, struct value **cvalue, struct type **ctype, |
| 3688 | char **cfull_expression) |
| 3689 | { |
| 3690 | struct value *value; |
| 3691 | struct type *type; |
| 3692 | int was_ptr; |
| 3693 | int lookup_actual_type = 0; |
| 3694 | char *parent_expression = NULL; |
| 3695 | struct varobj *var; |
| 3696 | struct value_print_options opts; |
| 3697 | |
| 3698 | if (cname) |
| 3699 | *cname = NULL; |
| 3700 | if (cvalue) |
| 3701 | *cvalue = NULL; |
| 3702 | if (ctype) |
| 3703 | *ctype = NULL; |
| 3704 | if (cfull_expression) |
| 3705 | *cfull_expression = NULL; |
| 3706 | |
| 3707 | get_user_print_options (&opts); |
| 3708 | |
| 3709 | var = (CPLUS_FAKE_CHILD (parent)) ? parent->parent : parent; |
| 3710 | if (opts.objectprint) |
| 3711 | lookup_actual_type = (TYPE_CODE (var->type) == TYPE_CODE_REF |
| 3712 | || TYPE_CODE (var->type) == TYPE_CODE_PTR); |
| 3713 | value = var->value; |
| 3714 | type = get_value_type (var); |
| 3715 | if (cfull_expression) |
| 3716 | parent_expression = varobj_get_path_expr (get_path_expr_parent (var)); |
| 3717 | |
| 3718 | adjust_value_for_child_access (&value, &type, &was_ptr, lookup_actual_type); |
| 3719 | |
| 3720 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT |
| 3721 | || TYPE_CODE (type) == TYPE_CODE_UNION) |
| 3722 | { |
| 3723 | char *join = was_ptr ? "->" : "."; |
| 3724 | |
| 3725 | if (CPLUS_FAKE_CHILD (parent)) |
| 3726 | { |
| 3727 | /* The fields of the class type are ordered as they |
| 3728 | appear in the class. We are given an index for a |
| 3729 | particular access control type ("public","protected", |
| 3730 | or "private"). We must skip over fields that don't |
| 3731 | have the access control we are looking for to properly |
| 3732 | find the indexed field. */ |
| 3733 | int type_index = TYPE_N_BASECLASSES (type); |
| 3734 | enum accessibility acc = public_field; |
| 3735 | int vptr_fieldno; |
| 3736 | struct type *basetype = NULL; |
| 3737 | const char *field_name; |
| 3738 | |
| 3739 | vptr_fieldno = get_vptr_fieldno (type, &basetype); |
| 3740 | if (strcmp (parent->name, "private") == 0) |
| 3741 | acc = private_field; |
| 3742 | else if (strcmp (parent->name, "protected") == 0) |
| 3743 | acc = protected_field; |
| 3744 | |
| 3745 | while (index >= 0) |
| 3746 | { |
| 3747 | if ((type == basetype && type_index == vptr_fieldno) |
| 3748 | || TYPE_FIELD_ARTIFICIAL (type, type_index)) |
| 3749 | ; /* ignore vptr */ |
| 3750 | else if (match_accessibility (type, type_index, acc)) |
| 3751 | --index; |
| 3752 | ++type_index; |
| 3753 | } |
| 3754 | --type_index; |
| 3755 | |
| 3756 | /* If the type is anonymous and the field has no name, |
| 3757 | set an appopriate name. */ |
| 3758 | field_name = TYPE_FIELD_NAME (type, type_index); |
| 3759 | if (field_name == NULL || *field_name == '\0') |
| 3760 | { |
| 3761 | if (cname) |
| 3762 | { |
| 3763 | if (TYPE_CODE (TYPE_FIELD_TYPE (type, type_index)) |
| 3764 | == TYPE_CODE_STRUCT) |
| 3765 | *cname = xstrdup (ANONYMOUS_STRUCT_NAME); |
| 3766 | else if (TYPE_CODE (TYPE_FIELD_TYPE (type, type_index)) |
| 3767 | == TYPE_CODE_UNION) |
| 3768 | *cname = xstrdup (ANONYMOUS_UNION_NAME); |
| 3769 | } |
| 3770 | |
| 3771 | if (cfull_expression) |
| 3772 | *cfull_expression = xstrdup (""); |
| 3773 | } |
| 3774 | else |
| 3775 | { |
| 3776 | if (cname) |
| 3777 | *cname = xstrdup (TYPE_FIELD_NAME (type, type_index)); |
| 3778 | |
| 3779 | if (cfull_expression) |
| 3780 | *cfull_expression |
| 3781 | = xstrprintf ("((%s)%s%s)", parent_expression, join, |
| 3782 | field_name); |
| 3783 | } |
| 3784 | |
| 3785 | if (cvalue && value) |
| 3786 | *cvalue = value_struct_element_index (value, type_index); |
| 3787 | |
| 3788 | if (ctype) |
| 3789 | *ctype = TYPE_FIELD_TYPE (type, type_index); |
| 3790 | } |
| 3791 | else if (index < TYPE_N_BASECLASSES (type)) |
| 3792 | { |
| 3793 | /* This is a baseclass. */ |
| 3794 | if (cname) |
| 3795 | *cname = xstrdup (TYPE_FIELD_NAME (type, index)); |
| 3796 | |
| 3797 | if (cvalue && value) |
| 3798 | *cvalue = value_cast (TYPE_FIELD_TYPE (type, index), value); |
| 3799 | |
| 3800 | if (ctype) |
| 3801 | { |
| 3802 | *ctype = TYPE_FIELD_TYPE (type, index); |
| 3803 | } |
| 3804 | |
| 3805 | if (cfull_expression) |
| 3806 | { |
| 3807 | char *ptr = was_ptr ? "*" : ""; |
| 3808 | |
| 3809 | /* Cast the parent to the base' type. Note that in gdb, |
| 3810 | expression like |
| 3811 | (Base1)d |
| 3812 | will create an lvalue, for all appearences, so we don't |
| 3813 | need to use more fancy: |
| 3814 | *(Base1*)(&d) |
| 3815 | construct. |
| 3816 | |
| 3817 | When we are in the scope of the base class or of one |
| 3818 | of its children, the type field name will be interpreted |
| 3819 | as a constructor, if it exists. Therefore, we must |
| 3820 | indicate that the name is a class name by using the |
| 3821 | 'class' keyword. See PR mi/11912 */ |
| 3822 | *cfull_expression = xstrprintf ("(%s(class %s%s) %s)", |
| 3823 | ptr, |
| 3824 | TYPE_FIELD_NAME (type, index), |
| 3825 | ptr, |
| 3826 | parent_expression); |
| 3827 | } |
| 3828 | } |
| 3829 | else |
| 3830 | { |
| 3831 | char *access = NULL; |
| 3832 | int children[3]; |
| 3833 | |
| 3834 | cplus_class_num_children (type, children); |
| 3835 | |
| 3836 | /* Everything beyond the baseclasses can |
| 3837 | only be "public", "private", or "protected" |
| 3838 | |
| 3839 | The special "fake" children are always output by varobj in |
| 3840 | this order. So if INDEX == 2, it MUST be "protected". */ |
| 3841 | index -= TYPE_N_BASECLASSES (type); |
| 3842 | switch (index) |
| 3843 | { |
| 3844 | case 0: |
| 3845 | if (children[v_public] > 0) |
| 3846 | access = "public"; |
| 3847 | else if (children[v_private] > 0) |
| 3848 | access = "private"; |
| 3849 | else |
| 3850 | access = "protected"; |
| 3851 | break; |
| 3852 | case 1: |
| 3853 | if (children[v_public] > 0) |
| 3854 | { |
| 3855 | if (children[v_private] > 0) |
| 3856 | access = "private"; |
| 3857 | else |
| 3858 | access = "protected"; |
| 3859 | } |
| 3860 | else if (children[v_private] > 0) |
| 3861 | access = "protected"; |
| 3862 | break; |
| 3863 | case 2: |
| 3864 | /* Must be protected. */ |
| 3865 | access = "protected"; |
| 3866 | break; |
| 3867 | default: |
| 3868 | /* error! */ |
| 3869 | break; |
| 3870 | } |
| 3871 | |
| 3872 | gdb_assert (access); |
| 3873 | if (cname) |
| 3874 | *cname = xstrdup (access); |
| 3875 | |
| 3876 | /* Value and type and full expression are null here. */ |
| 3877 | } |
| 3878 | } |
| 3879 | else |
| 3880 | { |
| 3881 | c_describe_child (parent, index, cname, cvalue, ctype, cfull_expression); |
| 3882 | } |
| 3883 | } |
| 3884 | |
| 3885 | static char * |
| 3886 | cplus_name_of_child (struct varobj *parent, int index) |
| 3887 | { |
| 3888 | char *name = NULL; |
| 3889 | |
| 3890 | cplus_describe_child (parent, index, &name, NULL, NULL, NULL); |
| 3891 | return name; |
| 3892 | } |
| 3893 | |
| 3894 | static char * |
| 3895 | cplus_path_expr_of_child (struct varobj *child) |
| 3896 | { |
| 3897 | cplus_describe_child (child->parent, child->index, NULL, NULL, NULL, |
| 3898 | &child->path_expr); |
| 3899 | return child->path_expr; |
| 3900 | } |
| 3901 | |
| 3902 | static struct value * |
| 3903 | cplus_value_of_root (struct varobj **var_handle) |
| 3904 | { |
| 3905 | return c_value_of_root (var_handle); |
| 3906 | } |
| 3907 | |
| 3908 | static struct value * |
| 3909 | cplus_value_of_child (struct varobj *parent, int index) |
| 3910 | { |
| 3911 | struct value *value = NULL; |
| 3912 | |
| 3913 | cplus_describe_child (parent, index, NULL, &value, NULL, NULL); |
| 3914 | return value; |
| 3915 | } |
| 3916 | |
| 3917 | static struct type * |
| 3918 | cplus_type_of_child (struct varobj *parent, int index) |
| 3919 | { |
| 3920 | struct type *type = NULL; |
| 3921 | |
| 3922 | cplus_describe_child (parent, index, NULL, NULL, &type, NULL); |
| 3923 | return type; |
| 3924 | } |
| 3925 | |
| 3926 | static char * |
| 3927 | cplus_value_of_variable (struct varobj *var, |
| 3928 | enum varobj_display_formats format) |
| 3929 | { |
| 3930 | |
| 3931 | /* If we have one of our special types, don't print out |
| 3932 | any value. */ |
| 3933 | if (CPLUS_FAKE_CHILD (var)) |
| 3934 | return xstrdup (""); |
| 3935 | |
| 3936 | return c_value_of_variable (var, format); |
| 3937 | } |
| 3938 | \f |
| 3939 | /* Java */ |
| 3940 | |
| 3941 | static int |
| 3942 | java_number_of_children (struct varobj *var) |
| 3943 | { |
| 3944 | return cplus_number_of_children (var); |
| 3945 | } |
| 3946 | |
| 3947 | static char * |
| 3948 | java_name_of_variable (struct varobj *parent) |
| 3949 | { |
| 3950 | char *p, *name; |
| 3951 | |
| 3952 | name = cplus_name_of_variable (parent); |
| 3953 | /* If the name has "-" in it, it is because we |
| 3954 | needed to escape periods in the name... */ |
| 3955 | p = name; |
| 3956 | |
| 3957 | while (*p != '\000') |
| 3958 | { |
| 3959 | if (*p == '-') |
| 3960 | *p = '.'; |
| 3961 | p++; |
| 3962 | } |
| 3963 | |
| 3964 | return name; |
| 3965 | } |
| 3966 | |
| 3967 | static char * |
| 3968 | java_name_of_child (struct varobj *parent, int index) |
| 3969 | { |
| 3970 | char *name, *p; |
| 3971 | |
| 3972 | name = cplus_name_of_child (parent, index); |
| 3973 | /* Escape any periods in the name... */ |
| 3974 | p = name; |
| 3975 | |
| 3976 | while (*p != '\000') |
| 3977 | { |
| 3978 | if (*p == '.') |
| 3979 | *p = '-'; |
| 3980 | p++; |
| 3981 | } |
| 3982 | |
| 3983 | return name; |
| 3984 | } |
| 3985 | |
| 3986 | static char * |
| 3987 | java_path_expr_of_child (struct varobj *child) |
| 3988 | { |
| 3989 | return NULL; |
| 3990 | } |
| 3991 | |
| 3992 | static struct value * |
| 3993 | java_value_of_root (struct varobj **var_handle) |
| 3994 | { |
| 3995 | return cplus_value_of_root (var_handle); |
| 3996 | } |
| 3997 | |
| 3998 | static struct value * |
| 3999 | java_value_of_child (struct varobj *parent, int index) |
| 4000 | { |
| 4001 | return cplus_value_of_child (parent, index); |
| 4002 | } |
| 4003 | |
| 4004 | static struct type * |
| 4005 | java_type_of_child (struct varobj *parent, int index) |
| 4006 | { |
| 4007 | return cplus_type_of_child (parent, index); |
| 4008 | } |
| 4009 | |
| 4010 | static char * |
| 4011 | java_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
| 4012 | { |
| 4013 | return cplus_value_of_variable (var, format); |
| 4014 | } |
| 4015 | |
| 4016 | /* Ada specific callbacks for VAROBJs. */ |
| 4017 | |
| 4018 | static int |
| 4019 | ada_number_of_children (struct varobj *var) |
| 4020 | { |
| 4021 | return ada_varobj_get_number_of_children (var->value, var->type); |
| 4022 | } |
| 4023 | |
| 4024 | static char * |
| 4025 | ada_name_of_variable (struct varobj *parent) |
| 4026 | { |
| 4027 | return c_name_of_variable (parent); |
| 4028 | } |
| 4029 | |
| 4030 | static char * |
| 4031 | ada_name_of_child (struct varobj *parent, int index) |
| 4032 | { |
| 4033 | return ada_varobj_get_name_of_child (parent->value, parent->type, |
| 4034 | parent->name, index); |
| 4035 | } |
| 4036 | |
| 4037 | static char* |
| 4038 | ada_path_expr_of_child (struct varobj *child) |
| 4039 | { |
| 4040 | struct varobj *parent = child->parent; |
| 4041 | const char *parent_path_expr = varobj_get_path_expr (parent); |
| 4042 | |
| 4043 | return ada_varobj_get_path_expr_of_child (parent->value, |
| 4044 | parent->type, |
| 4045 | parent->name, |
| 4046 | parent_path_expr, |
| 4047 | child->index); |
| 4048 | } |
| 4049 | |
| 4050 | static struct value * |
| 4051 | ada_value_of_root (struct varobj **var_handle) |
| 4052 | { |
| 4053 | return c_value_of_root (var_handle); |
| 4054 | } |
| 4055 | |
| 4056 | static struct value * |
| 4057 | ada_value_of_child (struct varobj *parent, int index) |
| 4058 | { |
| 4059 | return ada_varobj_get_value_of_child (parent->value, parent->type, |
| 4060 | parent->name, index); |
| 4061 | } |
| 4062 | |
| 4063 | static struct type * |
| 4064 | ada_type_of_child (struct varobj *parent, int index) |
| 4065 | { |
| 4066 | return ada_varobj_get_type_of_child (parent->value, parent->type, |
| 4067 | index); |
| 4068 | } |
| 4069 | |
| 4070 | static char * |
| 4071 | ada_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
| 4072 | { |
| 4073 | struct value_print_options opts; |
| 4074 | |
| 4075 | get_formatted_print_options (&opts, format_code[(int) format]); |
| 4076 | opts.deref_ref = 0; |
| 4077 | opts.raw = 1; |
| 4078 | |
| 4079 | return ada_varobj_get_value_of_variable (var->value, var->type, &opts); |
| 4080 | } |
| 4081 | |
| 4082 | /* Implement the "value_is_changeable_p" routine for Ada. */ |
| 4083 | |
| 4084 | static int |
| 4085 | ada_value_is_changeable_p (struct varobj *var) |
| 4086 | { |
| 4087 | struct type *type = var->value ? value_type (var->value) : var->type; |
| 4088 | |
| 4089 | if (ada_is_array_descriptor_type (type) |
| 4090 | && TYPE_CODE (type) == TYPE_CODE_TYPEDEF) |
| 4091 | { |
| 4092 | /* This is in reality a pointer to an unconstrained array. |
| 4093 | its value is changeable. */ |
| 4094 | return 1; |
| 4095 | } |
| 4096 | |
| 4097 | if (ada_is_string_type (type)) |
| 4098 | { |
| 4099 | /* We display the contents of the string in the array's |
| 4100 | "value" field. The contents can change, so consider |
| 4101 | that the array is changeable. */ |
| 4102 | return 1; |
| 4103 | } |
| 4104 | |
| 4105 | return default_value_is_changeable_p (var); |
| 4106 | } |
| 4107 | |
| 4108 | /* Implement the "value_has_mutated" routine for Ada. */ |
| 4109 | |
| 4110 | static int |
| 4111 | ada_value_has_mutated (struct varobj *var, struct value *new_val, |
| 4112 | struct type *new_type) |
| 4113 | { |
| 4114 | int i; |
| 4115 | int from = -1; |
| 4116 | int to = -1; |
| 4117 | |
| 4118 | /* If the number of fields have changed, then for sure the type |
| 4119 | has mutated. */ |
| 4120 | if (ada_varobj_get_number_of_children (new_val, new_type) |
| 4121 | != var->num_children) |
| 4122 | return 1; |
| 4123 | |
| 4124 | /* If the number of fields have remained the same, then we need |
| 4125 | to check the name of each field. If they remain the same, |
| 4126 | then chances are the type hasn't mutated. This is technically |
| 4127 | an incomplete test, as the child's type might have changed |
| 4128 | despite the fact that the name remains the same. But we'll |
| 4129 | handle this situation by saying that the child has mutated, |
| 4130 | not this value. |
| 4131 | |
| 4132 | If only part (or none!) of the children have been fetched, |
| 4133 | then only check the ones we fetched. It does not matter |
| 4134 | to the frontend whether a child that it has not fetched yet |
| 4135 | has mutated or not. So just assume it hasn't. */ |
| 4136 | |
| 4137 | restrict_range (var->children, &from, &to); |
| 4138 | for (i = from; i < to; i++) |
| 4139 | if (strcmp (ada_varobj_get_name_of_child (new_val, new_type, |
| 4140 | var->name, i), |
| 4141 | VEC_index (varobj_p, var->children, i)->name) != 0) |
| 4142 | return 1; |
| 4143 | |
| 4144 | return 0; |
| 4145 | } |
| 4146 | |
| 4147 | /* Iterate all the existing _root_ VAROBJs and call the FUNC callback for them |
| 4148 | with an arbitrary caller supplied DATA pointer. */ |
| 4149 | |
| 4150 | void |
| 4151 | all_root_varobjs (void (*func) (struct varobj *var, void *data), void *data) |
| 4152 | { |
| 4153 | struct varobj_root *var_root, *var_root_next; |
| 4154 | |
| 4155 | /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */ |
| 4156 | |
| 4157 | for (var_root = rootlist; var_root != NULL; var_root = var_root_next) |
| 4158 | { |
| 4159 | var_root_next = var_root->next; |
| 4160 | |
| 4161 | (*func) (var_root->rootvar, data); |
| 4162 | } |
| 4163 | } |
| 4164 | \f |
| 4165 | extern void _initialize_varobj (void); |
| 4166 | void |
| 4167 | _initialize_varobj (void) |
| 4168 | { |
| 4169 | int sizeof_table = sizeof (struct vlist *) * VAROBJ_TABLE_SIZE; |
| 4170 | |
| 4171 | varobj_table = xmalloc (sizeof_table); |
| 4172 | memset (varobj_table, 0, sizeof_table); |
| 4173 | |
| 4174 | add_setshow_zuinteger_cmd ("debugvarobj", class_maintenance, |
| 4175 | &varobjdebug, |
| 4176 | _("Set varobj debugging."), |
| 4177 | _("Show varobj debugging."), |
| 4178 | _("When non-zero, varobj debugging is enabled."), |
| 4179 | NULL, show_varobjdebug, |
| 4180 | &setlist, &showlist); |
| 4181 | } |
| 4182 | |
| 4183 | /* Invalidate varobj VAR if it is tied to locals and re-create it if it is |
| 4184 | defined on globals. It is a helper for varobj_invalidate. |
| 4185 | |
| 4186 | This function is called after changing the symbol file, in this case the |
| 4187 | pointers to "struct type" stored by the varobj are no longer valid. All |
| 4188 | varobj must be either re-evaluated, or marked as invalid here. */ |
| 4189 | |
| 4190 | static void |
| 4191 | varobj_invalidate_iter (struct varobj *var, void *unused) |
| 4192 | { |
| 4193 | /* global and floating var must be re-evaluated. */ |
| 4194 | if (var->root->floating || var->root->valid_block == NULL) |
| 4195 | { |
| 4196 | struct varobj *tmp_var; |
| 4197 | |
| 4198 | /* Try to create a varobj with same expression. If we succeed |
| 4199 | replace the old varobj, otherwise invalidate it. */ |
| 4200 | tmp_var = varobj_create (NULL, var->name, (CORE_ADDR) 0, |
| 4201 | USE_CURRENT_FRAME); |
| 4202 | if (tmp_var != NULL) |
| 4203 | { |
| 4204 | tmp_var->obj_name = xstrdup (var->obj_name); |
| 4205 | varobj_delete (var, NULL, 0); |
| 4206 | install_variable (tmp_var); |
| 4207 | } |
| 4208 | else |
| 4209 | var->root->is_valid = 0; |
| 4210 | } |
| 4211 | else /* locals must be invalidated. */ |
| 4212 | var->root->is_valid = 0; |
| 4213 | } |
| 4214 | |
| 4215 | /* Invalidate the varobjs that are tied to locals and re-create the ones that |
| 4216 | are defined on globals. |
| 4217 | Invalidated varobjs will be always printed in_scope="invalid". */ |
| 4218 | |
| 4219 | void |
| 4220 | varobj_invalidate (void) |
| 4221 | { |
| 4222 | all_root_varobjs (varobj_invalidate_iter, NULL); |
| 4223 | } |