| 1 | /* Implementation of the GDB variable objects API. |
| 2 | |
| 3 | Copyright (C) 1999-2021 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 "value.h" |
| 20 | #include "expression.h" |
| 21 | #include "frame.h" |
| 22 | #include "language.h" |
| 23 | #include "gdbcmd.h" |
| 24 | #include "block.h" |
| 25 | #include "valprint.h" |
| 26 | #include "gdb_regex.h" |
| 27 | |
| 28 | #include "varobj.h" |
| 29 | #include "gdbthread.h" |
| 30 | #include "inferior.h" |
| 31 | #include "varobj-iter.h" |
| 32 | #include "parser-defs.h" |
| 33 | #include "gdbarch.h" |
| 34 | #include <algorithm> |
| 35 | |
| 36 | #if HAVE_PYTHON |
| 37 | #include "python/python.h" |
| 38 | #include "python/python-internal.h" |
| 39 | #else |
| 40 | typedef int PyObject; |
| 41 | #endif |
| 42 | |
| 43 | /* See varobj.h. */ |
| 44 | |
| 45 | unsigned int varobjdebug = 0; |
| 46 | static void |
| 47 | show_varobjdebug (struct ui_file *file, int from_tty, |
| 48 | struct cmd_list_element *c, const char *value) |
| 49 | { |
| 50 | fprintf_filtered (file, _("Varobj debugging is %s.\n"), value); |
| 51 | } |
| 52 | |
| 53 | /* String representations of gdb's format codes. */ |
| 54 | const char *varobj_format_string[] = |
| 55 | { "natural", "binary", "decimal", "hexadecimal", "octal", "zero-hexadecimal" }; |
| 56 | |
| 57 | /* True if we want to allow Python-based pretty-printing. */ |
| 58 | static bool pretty_printing = false; |
| 59 | |
| 60 | void |
| 61 | varobj_enable_pretty_printing (void) |
| 62 | { |
| 63 | pretty_printing = true; |
| 64 | } |
| 65 | |
| 66 | /* Data structures */ |
| 67 | |
| 68 | /* Every root variable has one of these structures saved in its |
| 69 | varobj. */ |
| 70 | struct varobj_root |
| 71 | { |
| 72 | /* The expression for this parent. */ |
| 73 | expression_up exp; |
| 74 | |
| 75 | /* Block for which this expression is valid. */ |
| 76 | const struct block *valid_block = NULL; |
| 77 | |
| 78 | /* The frame for this expression. This field is set iff valid_block is |
| 79 | not NULL. */ |
| 80 | struct frame_id frame = null_frame_id; |
| 81 | |
| 82 | /* The global thread ID that this varobj_root belongs to. This field |
| 83 | is only valid if valid_block is not NULL. |
| 84 | When not 0, indicates which thread 'frame' belongs to. |
| 85 | When 0, indicates that the thread list was empty when the varobj_root |
| 86 | was created. */ |
| 87 | int thread_id = 0; |
| 88 | |
| 89 | /* If true, the -var-update always recomputes the value in the |
| 90 | current thread and frame. Otherwise, variable object is |
| 91 | always updated in the specific scope/thread/frame. */ |
| 92 | bool floating = false; |
| 93 | |
| 94 | /* Flag that indicates validity: set to false when this varobj_root refers |
| 95 | to symbols that do not exist anymore. */ |
| 96 | bool is_valid = true; |
| 97 | |
| 98 | /* Language-related operations for this variable and its |
| 99 | children. */ |
| 100 | const struct lang_varobj_ops *lang_ops = NULL; |
| 101 | |
| 102 | /* The varobj for this root node. */ |
| 103 | struct varobj *rootvar = NULL; |
| 104 | }; |
| 105 | |
| 106 | /* Dynamic part of varobj. */ |
| 107 | |
| 108 | struct varobj_dynamic |
| 109 | { |
| 110 | /* Whether the children of this varobj were requested. This field is |
| 111 | used to decide if dynamic varobj should recompute their children. |
| 112 | In the event that the frontend never asked for the children, we |
| 113 | can avoid that. */ |
| 114 | bool children_requested = false; |
| 115 | |
| 116 | /* The pretty-printer constructor. If NULL, then the default |
| 117 | pretty-printer will be looked up. If None, then no |
| 118 | pretty-printer will be installed. */ |
| 119 | PyObject *constructor = NULL; |
| 120 | |
| 121 | /* The pretty-printer that has been constructed. If NULL, then a |
| 122 | new printer object is needed, and one will be constructed. */ |
| 123 | PyObject *pretty_printer = NULL; |
| 124 | |
| 125 | /* The iterator returned by the printer's 'children' method, or NULL |
| 126 | if not available. */ |
| 127 | std::unique_ptr<varobj_iter> child_iter; |
| 128 | |
| 129 | /* We request one extra item from the iterator, so that we can |
| 130 | report to the caller whether there are more items than we have |
| 131 | already reported. However, we don't want to install this value |
| 132 | when we read it, because that will mess up future updates. So, |
| 133 | we stash it here instead. */ |
| 134 | std::unique_ptr<varobj_item> saved_item; |
| 135 | }; |
| 136 | |
| 137 | /* Private function prototypes */ |
| 138 | |
| 139 | /* Helper functions for the above subcommands. */ |
| 140 | |
| 141 | static int delete_variable (struct varobj *, bool); |
| 142 | |
| 143 | static void delete_variable_1 (int *, struct varobj *, bool, bool); |
| 144 | |
| 145 | static void install_variable (struct varobj *); |
| 146 | |
| 147 | static void uninstall_variable (struct varobj *); |
| 148 | |
| 149 | static struct varobj *create_child (struct varobj *, int, std::string &); |
| 150 | |
| 151 | static struct varobj * |
| 152 | create_child_with_value (struct varobj *parent, int index, |
| 153 | struct varobj_item *item); |
| 154 | |
| 155 | /* Utility routines */ |
| 156 | |
| 157 | static enum varobj_display_formats variable_default_display (struct varobj *); |
| 158 | |
| 159 | static bool update_type_if_necessary (struct varobj *var, |
| 160 | struct value *new_value); |
| 161 | |
| 162 | static bool install_new_value (struct varobj *var, struct value *value, |
| 163 | bool initial); |
| 164 | |
| 165 | /* Language-specific routines. */ |
| 166 | |
| 167 | static int number_of_children (const struct varobj *); |
| 168 | |
| 169 | static std::string name_of_variable (const struct varobj *); |
| 170 | |
| 171 | static std::string name_of_child (struct varobj *, int); |
| 172 | |
| 173 | static struct value *value_of_root (struct varobj **var_handle, bool *); |
| 174 | |
| 175 | static struct value *value_of_child (const struct varobj *parent, int index); |
| 176 | |
| 177 | static std::string my_value_of_variable (struct varobj *var, |
| 178 | enum varobj_display_formats format); |
| 179 | |
| 180 | static bool is_root_p (const struct varobj *var); |
| 181 | |
| 182 | static struct varobj *varobj_add_child (struct varobj *var, |
| 183 | struct varobj_item *item); |
| 184 | |
| 185 | /* Private data */ |
| 186 | |
| 187 | /* Mappings of varobj_display_formats enums to gdb's format codes. */ |
| 188 | static int format_code[] = { 0, 't', 'd', 'x', 'o', 'z' }; |
| 189 | |
| 190 | /* List of root variable objects. */ |
| 191 | static std::list<struct varobj_root *> rootlist; |
| 192 | |
| 193 | /* Pointer to the varobj hash table (built at run time). */ |
| 194 | static htab_t varobj_table; |
| 195 | |
| 196 | \f |
| 197 | |
| 198 | /* API Implementation */ |
| 199 | static bool |
| 200 | is_root_p (const struct varobj *var) |
| 201 | { |
| 202 | return (var->root->rootvar == var); |
| 203 | } |
| 204 | |
| 205 | #ifdef HAVE_PYTHON |
| 206 | |
| 207 | /* See python-internal.h. */ |
| 208 | gdbpy_enter_varobj::gdbpy_enter_varobj (const struct varobj *var) |
| 209 | : gdbpy_enter (var->root->exp->gdbarch, var->root->exp->language_defn) |
| 210 | { |
| 211 | } |
| 212 | |
| 213 | #endif |
| 214 | |
| 215 | /* Return the full FRAME which corresponds to the given CORE_ADDR |
| 216 | or NULL if no FRAME on the chain corresponds to CORE_ADDR. */ |
| 217 | |
| 218 | static struct frame_info * |
| 219 | find_frame_addr_in_frame_chain (CORE_ADDR frame_addr) |
| 220 | { |
| 221 | struct frame_info *frame = NULL; |
| 222 | |
| 223 | if (frame_addr == (CORE_ADDR) 0) |
| 224 | return NULL; |
| 225 | |
| 226 | for (frame = get_current_frame (); |
| 227 | frame != NULL; |
| 228 | frame = get_prev_frame (frame)) |
| 229 | { |
| 230 | /* The CORE_ADDR we get as argument was parsed from a string GDB |
| 231 | output as $fp. This output got truncated to gdbarch_addr_bit. |
| 232 | Truncate the frame base address in the same manner before |
| 233 | comparing it against our argument. */ |
| 234 | CORE_ADDR frame_base = get_frame_base_address (frame); |
| 235 | int addr_bit = gdbarch_addr_bit (get_frame_arch (frame)); |
| 236 | |
| 237 | if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT)) |
| 238 | frame_base &= ((CORE_ADDR) 1 << addr_bit) - 1; |
| 239 | |
| 240 | if (frame_base == frame_addr) |
| 241 | return frame; |
| 242 | } |
| 243 | |
| 244 | return NULL; |
| 245 | } |
| 246 | |
| 247 | /* Creates a varobj (not its children). */ |
| 248 | |
| 249 | struct varobj * |
| 250 | varobj_create (const char *objname, |
| 251 | const char *expression, CORE_ADDR frame, enum varobj_type type) |
| 252 | { |
| 253 | /* Fill out a varobj structure for the (root) variable being constructed. */ |
| 254 | std::unique_ptr<varobj> var (new varobj (new varobj_root)); |
| 255 | |
| 256 | if (expression != NULL) |
| 257 | { |
| 258 | struct frame_info *fi; |
| 259 | struct frame_id old_id = null_frame_id; |
| 260 | const struct block *block; |
| 261 | const char *p; |
| 262 | struct value *value = NULL; |
| 263 | CORE_ADDR pc; |
| 264 | |
| 265 | /* Parse and evaluate the expression, filling in as much of the |
| 266 | variable's data as possible. */ |
| 267 | |
| 268 | if (has_stack_frames ()) |
| 269 | { |
| 270 | /* Allow creator to specify context of variable. */ |
| 271 | if ((type == USE_CURRENT_FRAME) || (type == USE_SELECTED_FRAME)) |
| 272 | fi = get_selected_frame (NULL); |
| 273 | else |
| 274 | /* FIXME: cagney/2002-11-23: This code should be doing a |
| 275 | lookup using the frame ID and not just the frame's |
| 276 | ``address''. This, of course, means an interface |
| 277 | change. However, with out that interface change ISAs, |
| 278 | such as the ia64 with its two stacks, won't work. |
| 279 | Similar goes for the case where there is a frameless |
| 280 | function. */ |
| 281 | fi = find_frame_addr_in_frame_chain (frame); |
| 282 | } |
| 283 | else |
| 284 | fi = NULL; |
| 285 | |
| 286 | if (type == USE_SELECTED_FRAME) |
| 287 | var->root->floating = true; |
| 288 | |
| 289 | pc = 0; |
| 290 | block = NULL; |
| 291 | if (fi != NULL) |
| 292 | { |
| 293 | block = get_frame_block (fi, 0); |
| 294 | pc = get_frame_pc (fi); |
| 295 | } |
| 296 | |
| 297 | p = expression; |
| 298 | |
| 299 | innermost_block_tracker tracker (INNERMOST_BLOCK_FOR_SYMBOLS |
| 300 | | INNERMOST_BLOCK_FOR_REGISTERS); |
| 301 | /* Wrap the call to parse expression, so we can |
| 302 | return a sensible error. */ |
| 303 | try |
| 304 | { |
| 305 | var->root->exp = parse_exp_1 (&p, pc, block, 0, &tracker); |
| 306 | } |
| 307 | |
| 308 | catch (const gdb_exception_error &except) |
| 309 | { |
| 310 | return NULL; |
| 311 | } |
| 312 | |
| 313 | /* Don't allow variables to be created for types. */ |
| 314 | enum exp_opcode opcode = var->root->exp->first_opcode (); |
| 315 | if (opcode == OP_TYPE |
| 316 | || opcode == OP_TYPEOF |
| 317 | || opcode == OP_DECLTYPE) |
| 318 | { |
| 319 | fprintf_unfiltered (gdb_stderr, "Attempt to use a type name" |
| 320 | " as an expression.\n"); |
| 321 | return NULL; |
| 322 | } |
| 323 | |
| 324 | var->format = variable_default_display (var.get ()); |
| 325 | var->root->valid_block = |
| 326 | var->root->floating ? NULL : tracker.block (); |
| 327 | var->name = expression; |
| 328 | /* For a root var, the name and the expr are the same. */ |
| 329 | var->path_expr = expression; |
| 330 | |
| 331 | /* When the frame is different from the current frame, |
| 332 | we must select the appropriate frame before parsing |
| 333 | the expression, otherwise the value will not be current. |
| 334 | Since select_frame is so benign, just call it for all cases. */ |
| 335 | if (var->root->valid_block) |
| 336 | { |
| 337 | /* User could specify explicit FRAME-ADDR which was not found but |
| 338 | EXPRESSION is frame specific and we would not be able to evaluate |
| 339 | it correctly next time. With VALID_BLOCK set we must also set |
| 340 | FRAME and THREAD_ID. */ |
| 341 | if (fi == NULL) |
| 342 | error (_("Failed to find the specified frame")); |
| 343 | |
| 344 | var->root->frame = get_frame_id (fi); |
| 345 | var->root->thread_id = inferior_thread ()->global_num; |
| 346 | old_id = get_frame_id (get_selected_frame (NULL)); |
| 347 | select_frame (fi); |
| 348 | } |
| 349 | |
| 350 | /* We definitely need to catch errors here. |
| 351 | If evaluate_expression succeeds we got the value we wanted. |
| 352 | But if it fails, we still go on with a call to evaluate_type(). */ |
| 353 | try |
| 354 | { |
| 355 | value = evaluate_expression (var->root->exp.get ()); |
| 356 | } |
| 357 | catch (const gdb_exception_error &except) |
| 358 | { |
| 359 | /* Error getting the value. Try to at least get the |
| 360 | right type. */ |
| 361 | struct value *type_only_value = evaluate_type (var->root->exp.get ()); |
| 362 | |
| 363 | var->type = value_type (type_only_value); |
| 364 | } |
| 365 | |
| 366 | if (value != NULL) |
| 367 | { |
| 368 | int real_type_found = 0; |
| 369 | |
| 370 | var->type = value_actual_type (value, 0, &real_type_found); |
| 371 | if (real_type_found) |
| 372 | value = value_cast (var->type, value); |
| 373 | } |
| 374 | |
| 375 | /* Set language info */ |
| 376 | var->root->lang_ops = var->root->exp->language_defn->varobj_ops (); |
| 377 | |
| 378 | install_new_value (var.get (), value, 1 /* Initial assignment */); |
| 379 | |
| 380 | /* Set ourselves as our root. */ |
| 381 | var->root->rootvar = var.get (); |
| 382 | |
| 383 | /* Reset the selected frame. */ |
| 384 | if (frame_id_p (old_id)) |
| 385 | select_frame (frame_find_by_id (old_id)); |
| 386 | } |
| 387 | |
| 388 | /* If the variable object name is null, that means this |
| 389 | is a temporary variable, so don't install it. */ |
| 390 | |
| 391 | if ((var != NULL) && (objname != NULL)) |
| 392 | { |
| 393 | var->obj_name = objname; |
| 394 | install_variable (var.get ()); |
| 395 | } |
| 396 | |
| 397 | return var.release (); |
| 398 | } |
| 399 | |
| 400 | /* Generates an unique name that can be used for a varobj. */ |
| 401 | |
| 402 | std::string |
| 403 | varobj_gen_name (void) |
| 404 | { |
| 405 | static int id = 0; |
| 406 | |
| 407 | /* Generate a name for this object. */ |
| 408 | id++; |
| 409 | return string_printf ("var%d", id); |
| 410 | } |
| 411 | |
| 412 | /* Given an OBJNAME, returns the pointer to the corresponding varobj. Call |
| 413 | error if OBJNAME cannot be found. */ |
| 414 | |
| 415 | struct varobj * |
| 416 | varobj_get_handle (const char *objname) |
| 417 | { |
| 418 | varobj *var = (varobj *) htab_find_with_hash (varobj_table, objname, |
| 419 | htab_hash_string (objname)); |
| 420 | |
| 421 | if (var == NULL) |
| 422 | error (_("Variable object not found")); |
| 423 | |
| 424 | return var; |
| 425 | } |
| 426 | |
| 427 | /* Given the handle, return the name of the object. */ |
| 428 | |
| 429 | const char * |
| 430 | varobj_get_objname (const struct varobj *var) |
| 431 | { |
| 432 | return var->obj_name.c_str (); |
| 433 | } |
| 434 | |
| 435 | /* Given the handle, return the expression represented by the |
| 436 | object. */ |
| 437 | |
| 438 | std::string |
| 439 | varobj_get_expression (const struct varobj *var) |
| 440 | { |
| 441 | return name_of_variable (var); |
| 442 | } |
| 443 | |
| 444 | /* See varobj.h. */ |
| 445 | |
| 446 | int |
| 447 | varobj_delete (struct varobj *var, bool only_children) |
| 448 | { |
| 449 | return delete_variable (var, only_children); |
| 450 | } |
| 451 | |
| 452 | #if HAVE_PYTHON |
| 453 | |
| 454 | /* Convenience function for varobj_set_visualizer. Instantiate a |
| 455 | pretty-printer for a given value. */ |
| 456 | static PyObject * |
| 457 | instantiate_pretty_printer (PyObject *constructor, struct value *value) |
| 458 | { |
| 459 | gdbpy_ref<> val_obj (value_to_value_object (value)); |
| 460 | if (val_obj == nullptr) |
| 461 | return NULL; |
| 462 | |
| 463 | return PyObject_CallFunctionObjArgs (constructor, val_obj.get (), NULL); |
| 464 | } |
| 465 | |
| 466 | #endif |
| 467 | |
| 468 | /* Set/Get variable object display format. */ |
| 469 | |
| 470 | enum varobj_display_formats |
| 471 | varobj_set_display_format (struct varobj *var, |
| 472 | enum varobj_display_formats format) |
| 473 | { |
| 474 | switch (format) |
| 475 | { |
| 476 | case FORMAT_NATURAL: |
| 477 | case FORMAT_BINARY: |
| 478 | case FORMAT_DECIMAL: |
| 479 | case FORMAT_HEXADECIMAL: |
| 480 | case FORMAT_OCTAL: |
| 481 | case FORMAT_ZHEXADECIMAL: |
| 482 | var->format = format; |
| 483 | break; |
| 484 | |
| 485 | default: |
| 486 | var->format = variable_default_display (var); |
| 487 | } |
| 488 | |
| 489 | if (varobj_value_is_changeable_p (var) |
| 490 | && var->value != nullptr && !value_lazy (var->value.get ())) |
| 491 | { |
| 492 | var->print_value = varobj_value_get_print_value (var->value.get (), |
| 493 | var->format, var); |
| 494 | } |
| 495 | |
| 496 | return var->format; |
| 497 | } |
| 498 | |
| 499 | enum varobj_display_formats |
| 500 | varobj_get_display_format (const struct varobj *var) |
| 501 | { |
| 502 | return var->format; |
| 503 | } |
| 504 | |
| 505 | gdb::unique_xmalloc_ptr<char> |
| 506 | varobj_get_display_hint (const struct varobj *var) |
| 507 | { |
| 508 | gdb::unique_xmalloc_ptr<char> result; |
| 509 | |
| 510 | #if HAVE_PYTHON |
| 511 | if (!gdb_python_initialized) |
| 512 | return NULL; |
| 513 | |
| 514 | gdbpy_enter_varobj enter_py (var); |
| 515 | |
| 516 | if (var->dynamic->pretty_printer != NULL) |
| 517 | result = gdbpy_get_display_hint (var->dynamic->pretty_printer); |
| 518 | #endif |
| 519 | |
| 520 | return result; |
| 521 | } |
| 522 | |
| 523 | /* Return true if the varobj has items after TO, false otherwise. */ |
| 524 | |
| 525 | bool |
| 526 | varobj_has_more (const struct varobj *var, int to) |
| 527 | { |
| 528 | if (var->children.size () > to) |
| 529 | return true; |
| 530 | |
| 531 | return ((to == -1 || var->children.size () == to) |
| 532 | && (var->dynamic->saved_item != NULL)); |
| 533 | } |
| 534 | |
| 535 | /* If the variable object is bound to a specific thread, that |
| 536 | is its evaluation can always be done in context of a frame |
| 537 | inside that thread, returns GDB id of the thread -- which |
| 538 | is always positive. Otherwise, returns -1. */ |
| 539 | int |
| 540 | varobj_get_thread_id (const struct varobj *var) |
| 541 | { |
| 542 | if (var->root->valid_block && var->root->thread_id > 0) |
| 543 | return var->root->thread_id; |
| 544 | else |
| 545 | return -1; |
| 546 | } |
| 547 | |
| 548 | void |
| 549 | varobj_set_frozen (struct varobj *var, bool frozen) |
| 550 | { |
| 551 | /* When a variable is unfrozen, we don't fetch its value. |
| 552 | The 'not_fetched' flag remains set, so next -var-update |
| 553 | won't complain. |
| 554 | |
| 555 | We don't fetch the value, because for structures the client |
| 556 | should do -var-update anyway. It would be bad to have different |
| 557 | client-size logic for structure and other types. */ |
| 558 | var->frozen = frozen; |
| 559 | } |
| 560 | |
| 561 | bool |
| 562 | varobj_get_frozen (const struct varobj *var) |
| 563 | { |
| 564 | return var->frozen; |
| 565 | } |
| 566 | |
| 567 | /* A helper function that updates the contents of FROM and TO based on the |
| 568 | size of the vector CHILDREN. If the contents of either FROM or TO are |
| 569 | negative the entire range is used. */ |
| 570 | |
| 571 | void |
| 572 | varobj_restrict_range (const std::vector<varobj *> &children, |
| 573 | int *from, int *to) |
| 574 | { |
| 575 | int len = children.size (); |
| 576 | |
| 577 | if (*from < 0 || *to < 0) |
| 578 | { |
| 579 | *from = 0; |
| 580 | *to = len; |
| 581 | } |
| 582 | else |
| 583 | { |
| 584 | if (*from > len) |
| 585 | *from = len; |
| 586 | if (*to > len) |
| 587 | *to = len; |
| 588 | if (*from > *to) |
| 589 | *from = *to; |
| 590 | } |
| 591 | } |
| 592 | |
| 593 | /* A helper for update_dynamic_varobj_children that installs a new |
| 594 | child when needed. */ |
| 595 | |
| 596 | static void |
| 597 | install_dynamic_child (struct varobj *var, |
| 598 | std::vector<varobj *> *changed, |
| 599 | std::vector<varobj *> *type_changed, |
| 600 | std::vector<varobj *> *newobj, |
| 601 | std::vector<varobj *> *unchanged, |
| 602 | bool *cchanged, |
| 603 | int index, |
| 604 | struct varobj_item *item) |
| 605 | { |
| 606 | if (var->children.size () < index + 1) |
| 607 | { |
| 608 | /* There's no child yet. */ |
| 609 | struct varobj *child = varobj_add_child (var, item); |
| 610 | |
| 611 | if (newobj != NULL) |
| 612 | { |
| 613 | newobj->push_back (child); |
| 614 | *cchanged = true; |
| 615 | } |
| 616 | } |
| 617 | else |
| 618 | { |
| 619 | varobj *existing = var->children[index]; |
| 620 | bool type_updated = update_type_if_necessary (existing, |
| 621 | item->value.get ()); |
| 622 | |
| 623 | if (type_updated) |
| 624 | { |
| 625 | if (type_changed != NULL) |
| 626 | type_changed->push_back (existing); |
| 627 | } |
| 628 | if (install_new_value (existing, item->value.get (), 0)) |
| 629 | { |
| 630 | if (!type_updated && changed != NULL) |
| 631 | changed->push_back (existing); |
| 632 | } |
| 633 | else if (!type_updated && unchanged != NULL) |
| 634 | unchanged->push_back (existing); |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | #if HAVE_PYTHON |
| 639 | |
| 640 | static bool |
| 641 | dynamic_varobj_has_child_method (const struct varobj *var) |
| 642 | { |
| 643 | PyObject *printer = var->dynamic->pretty_printer; |
| 644 | |
| 645 | if (!gdb_python_initialized) |
| 646 | return false; |
| 647 | |
| 648 | gdbpy_enter_varobj enter_py (var); |
| 649 | return PyObject_HasAttr (printer, gdbpy_children_cst); |
| 650 | } |
| 651 | #endif |
| 652 | |
| 653 | /* A factory for creating dynamic varobj's iterators. Returns an |
| 654 | iterator object suitable for iterating over VAR's children. */ |
| 655 | |
| 656 | static std::unique_ptr<varobj_iter> |
| 657 | varobj_get_iterator (struct varobj *var) |
| 658 | { |
| 659 | #if HAVE_PYTHON |
| 660 | if (var->dynamic->pretty_printer) |
| 661 | return py_varobj_get_iterator (var, var->dynamic->pretty_printer); |
| 662 | #endif |
| 663 | |
| 664 | gdb_assert_not_reached (_("\ |
| 665 | requested an iterator from a non-dynamic varobj")); |
| 666 | } |
| 667 | |
| 668 | static bool |
| 669 | update_dynamic_varobj_children (struct varobj *var, |
| 670 | std::vector<varobj *> *changed, |
| 671 | std::vector<varobj *> *type_changed, |
| 672 | std::vector<varobj *> *newobj, |
| 673 | std::vector<varobj *> *unchanged, |
| 674 | bool *cchanged, |
| 675 | bool update_children, |
| 676 | int from, |
| 677 | int to) |
| 678 | { |
| 679 | int i; |
| 680 | |
| 681 | *cchanged = false; |
| 682 | |
| 683 | if (update_children || var->dynamic->child_iter == NULL) |
| 684 | { |
| 685 | var->dynamic->child_iter = varobj_get_iterator (var); |
| 686 | var->dynamic->saved_item.reset (nullptr); |
| 687 | |
| 688 | i = 0; |
| 689 | |
| 690 | if (var->dynamic->child_iter == NULL) |
| 691 | return false; |
| 692 | } |
| 693 | else |
| 694 | i = var->children.size (); |
| 695 | |
| 696 | /* We ask for one extra child, so that MI can report whether there |
| 697 | are more children. */ |
| 698 | for (; to < 0 || i < to + 1; ++i) |
| 699 | { |
| 700 | std::unique_ptr<varobj_item> item; |
| 701 | |
| 702 | /* See if there was a leftover from last time. */ |
| 703 | if (var->dynamic->saved_item != NULL) |
| 704 | item = std::move (var->dynamic->saved_item); |
| 705 | else |
| 706 | item = var->dynamic->child_iter->next (); |
| 707 | |
| 708 | if (item == NULL) |
| 709 | { |
| 710 | /* Iteration is done. Remove iterator from VAR. */ |
| 711 | var->dynamic->child_iter.reset (nullptr); |
| 712 | break; |
| 713 | } |
| 714 | /* We don't want to push the extra child on any report list. */ |
| 715 | if (to < 0 || i < to) |
| 716 | { |
| 717 | bool can_mention = from < 0 || i >= from; |
| 718 | |
| 719 | install_dynamic_child (var, can_mention ? changed : NULL, |
| 720 | can_mention ? type_changed : NULL, |
| 721 | can_mention ? newobj : NULL, |
| 722 | can_mention ? unchanged : NULL, |
| 723 | can_mention ? cchanged : NULL, i, |
| 724 | item.get ()); |
| 725 | } |
| 726 | else |
| 727 | { |
| 728 | var->dynamic->saved_item = std::move (item); |
| 729 | |
| 730 | /* We want to truncate the child list just before this |
| 731 | element. */ |
| 732 | break; |
| 733 | } |
| 734 | } |
| 735 | |
| 736 | if (i < var->children.size ()) |
| 737 | { |
| 738 | *cchanged = true; |
| 739 | for (int j = i; j < var->children.size (); ++j) |
| 740 | varobj_delete (var->children[j], 0); |
| 741 | |
| 742 | var->children.resize (i); |
| 743 | } |
| 744 | |
| 745 | /* If there are fewer children than requested, note that the list of |
| 746 | children changed. */ |
| 747 | if (to >= 0 && var->children.size () < to) |
| 748 | *cchanged = true; |
| 749 | |
| 750 | var->num_children = var->children.size (); |
| 751 | |
| 752 | return true; |
| 753 | } |
| 754 | |
| 755 | int |
| 756 | varobj_get_num_children (struct varobj *var) |
| 757 | { |
| 758 | if (var->num_children == -1) |
| 759 | { |
| 760 | if (varobj_is_dynamic_p (var)) |
| 761 | { |
| 762 | bool dummy; |
| 763 | |
| 764 | /* If we have a dynamic varobj, don't report -1 children. |
| 765 | So, try to fetch some children first. */ |
| 766 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, &dummy, |
| 767 | false, 0, 0); |
| 768 | } |
| 769 | else |
| 770 | var->num_children = number_of_children (var); |
| 771 | } |
| 772 | |
| 773 | return var->num_children >= 0 ? var->num_children : 0; |
| 774 | } |
| 775 | |
| 776 | /* Creates a list of the immediate children of a variable object; |
| 777 | the return code is the number of such children or -1 on error. */ |
| 778 | |
| 779 | const std::vector<varobj *> & |
| 780 | varobj_list_children (struct varobj *var, int *from, int *to) |
| 781 | { |
| 782 | var->dynamic->children_requested = true; |
| 783 | |
| 784 | if (varobj_is_dynamic_p (var)) |
| 785 | { |
| 786 | bool children_changed; |
| 787 | |
| 788 | /* This, in theory, can result in the number of children changing without |
| 789 | frontend noticing. But well, calling -var-list-children on the same |
| 790 | varobj twice is not something a sane frontend would do. */ |
| 791 | update_dynamic_varobj_children (var, NULL, NULL, NULL, NULL, |
| 792 | &children_changed, false, 0, *to); |
| 793 | varobj_restrict_range (var->children, from, to); |
| 794 | return var->children; |
| 795 | } |
| 796 | |
| 797 | if (var->num_children == -1) |
| 798 | var->num_children = number_of_children (var); |
| 799 | |
| 800 | /* If that failed, give up. */ |
| 801 | if (var->num_children == -1) |
| 802 | return var->children; |
| 803 | |
| 804 | /* If we're called when the list of children is not yet initialized, |
| 805 | allocate enough elements in it. */ |
| 806 | while (var->children.size () < var->num_children) |
| 807 | var->children.push_back (NULL); |
| 808 | |
| 809 | for (int i = 0; i < var->num_children; i++) |
| 810 | { |
| 811 | if (var->children[i] == NULL) |
| 812 | { |
| 813 | /* Either it's the first call to varobj_list_children for |
| 814 | this variable object, and the child was never created, |
| 815 | or it was explicitly deleted by the client. */ |
| 816 | std::string name = name_of_child (var, i); |
| 817 | var->children[i] = create_child (var, i, name); |
| 818 | } |
| 819 | } |
| 820 | |
| 821 | varobj_restrict_range (var->children, from, to); |
| 822 | return var->children; |
| 823 | } |
| 824 | |
| 825 | static struct varobj * |
| 826 | varobj_add_child (struct varobj *var, struct varobj_item *item) |
| 827 | { |
| 828 | varobj *v = create_child_with_value (var, var->children.size (), item); |
| 829 | |
| 830 | var->children.push_back (v); |
| 831 | |
| 832 | return v; |
| 833 | } |
| 834 | |
| 835 | /* Obtain the type of an object Variable as a string similar to the one gdb |
| 836 | prints on the console. The caller is responsible for freeing the string. |
| 837 | */ |
| 838 | |
| 839 | std::string |
| 840 | varobj_get_type (struct varobj *var) |
| 841 | { |
| 842 | /* For the "fake" variables, do not return a type. (Its type is |
| 843 | NULL, too.) |
| 844 | Do not return a type for invalid variables as well. */ |
| 845 | if (CPLUS_FAKE_CHILD (var) || !var->root->is_valid) |
| 846 | return std::string (); |
| 847 | |
| 848 | return type_to_string (var->type); |
| 849 | } |
| 850 | |
| 851 | /* Obtain the type of an object variable. */ |
| 852 | |
| 853 | struct type * |
| 854 | varobj_get_gdb_type (const struct varobj *var) |
| 855 | { |
| 856 | return var->type; |
| 857 | } |
| 858 | |
| 859 | /* Is VAR a path expression parent, i.e., can it be used to construct |
| 860 | a valid path expression? */ |
| 861 | |
| 862 | static bool |
| 863 | is_path_expr_parent (const struct varobj *var) |
| 864 | { |
| 865 | gdb_assert (var->root->lang_ops->is_path_expr_parent != NULL); |
| 866 | return var->root->lang_ops->is_path_expr_parent (var); |
| 867 | } |
| 868 | |
| 869 | /* Is VAR a path expression parent, i.e., can it be used to construct |
| 870 | a valid path expression? By default we assume any VAR can be a path |
| 871 | parent. */ |
| 872 | |
| 873 | bool |
| 874 | varobj_default_is_path_expr_parent (const struct varobj *var) |
| 875 | { |
| 876 | return true; |
| 877 | } |
| 878 | |
| 879 | /* Return the path expression parent for VAR. */ |
| 880 | |
| 881 | const struct varobj * |
| 882 | varobj_get_path_expr_parent (const struct varobj *var) |
| 883 | { |
| 884 | const struct varobj *parent = var; |
| 885 | |
| 886 | while (!is_root_p (parent) && !is_path_expr_parent (parent)) |
| 887 | parent = parent->parent; |
| 888 | |
| 889 | /* Computation of full rooted expression for children of dynamic |
| 890 | varobjs is not supported. */ |
| 891 | if (varobj_is_dynamic_p (parent)) |
| 892 | error (_("Invalid variable object (child of a dynamic varobj)")); |
| 893 | |
| 894 | return parent; |
| 895 | } |
| 896 | |
| 897 | /* Return a pointer to the full rooted expression of varobj VAR. |
| 898 | If it has not been computed yet, compute it. */ |
| 899 | |
| 900 | const char * |
| 901 | varobj_get_path_expr (const struct varobj *var) |
| 902 | { |
| 903 | if (var->path_expr.empty ()) |
| 904 | { |
| 905 | /* For root varobjs, we initialize path_expr |
| 906 | when creating varobj, so here it should be |
| 907 | child varobj. */ |
| 908 | struct varobj *mutable_var = (struct varobj *) var; |
| 909 | gdb_assert (!is_root_p (var)); |
| 910 | |
| 911 | mutable_var->path_expr = (*var->root->lang_ops->path_expr_of_child) (var); |
| 912 | } |
| 913 | |
| 914 | return var->path_expr.c_str (); |
| 915 | } |
| 916 | |
| 917 | const struct language_defn * |
| 918 | varobj_get_language (const struct varobj *var) |
| 919 | { |
| 920 | return var->root->exp->language_defn; |
| 921 | } |
| 922 | |
| 923 | int |
| 924 | varobj_get_attributes (const struct varobj *var) |
| 925 | { |
| 926 | int attributes = 0; |
| 927 | |
| 928 | if (varobj_editable_p (var)) |
| 929 | /* FIXME: define masks for attributes. */ |
| 930 | attributes |= 0x00000001; /* Editable */ |
| 931 | |
| 932 | return attributes; |
| 933 | } |
| 934 | |
| 935 | /* Return true if VAR is a dynamic varobj. */ |
| 936 | |
| 937 | bool |
| 938 | varobj_is_dynamic_p (const struct varobj *var) |
| 939 | { |
| 940 | return var->dynamic->pretty_printer != NULL; |
| 941 | } |
| 942 | |
| 943 | std::string |
| 944 | varobj_get_formatted_value (struct varobj *var, |
| 945 | enum varobj_display_formats format) |
| 946 | { |
| 947 | return my_value_of_variable (var, format); |
| 948 | } |
| 949 | |
| 950 | std::string |
| 951 | varobj_get_value (struct varobj *var) |
| 952 | { |
| 953 | return my_value_of_variable (var, var->format); |
| 954 | } |
| 955 | |
| 956 | /* Set the value of an object variable (if it is editable) to the |
| 957 | value of the given expression. */ |
| 958 | /* Note: Invokes functions that can call error(). */ |
| 959 | |
| 960 | bool |
| 961 | varobj_set_value (struct varobj *var, const char *expression) |
| 962 | { |
| 963 | struct value *val = NULL; /* Initialize to keep gcc happy. */ |
| 964 | /* The argument "expression" contains the variable's new value. |
| 965 | We need to first construct a legal expression for this -- ugh! */ |
| 966 | /* Does this cover all the bases? */ |
| 967 | struct value *value = NULL; /* Initialize to keep gcc happy. */ |
| 968 | int saved_input_radix = input_radix; |
| 969 | const char *s = expression; |
| 970 | |
| 971 | gdb_assert (varobj_editable_p (var)); |
| 972 | |
| 973 | input_radix = 10; /* ALWAYS reset to decimal temporarily. */ |
| 974 | expression_up exp = parse_exp_1 (&s, 0, 0, 0); |
| 975 | try |
| 976 | { |
| 977 | value = evaluate_expression (exp.get ()); |
| 978 | } |
| 979 | |
| 980 | catch (const gdb_exception_error &except) |
| 981 | { |
| 982 | /* We cannot proceed without a valid expression. */ |
| 983 | return false; |
| 984 | } |
| 985 | |
| 986 | /* All types that are editable must also be changeable. */ |
| 987 | gdb_assert (varobj_value_is_changeable_p (var)); |
| 988 | |
| 989 | /* The value of a changeable variable object must not be lazy. */ |
| 990 | gdb_assert (!value_lazy (var->value.get ())); |
| 991 | |
| 992 | /* Need to coerce the input. We want to check if the |
| 993 | value of the variable object will be different |
| 994 | after assignment, and the first thing value_assign |
| 995 | does is coerce the input. |
| 996 | For example, if we are assigning an array to a pointer variable we |
| 997 | should compare the pointer with the array's address, not with the |
| 998 | array's content. */ |
| 999 | value = coerce_array (value); |
| 1000 | |
| 1001 | /* The new value may be lazy. value_assign, or |
| 1002 | rather value_contents, will take care of this. */ |
| 1003 | try |
| 1004 | { |
| 1005 | val = value_assign (var->value.get (), value); |
| 1006 | } |
| 1007 | |
| 1008 | catch (const gdb_exception_error &except) |
| 1009 | { |
| 1010 | return false; |
| 1011 | } |
| 1012 | |
| 1013 | /* If the value has changed, record it, so that next -var-update can |
| 1014 | report this change. If a variable had a value of '1', we've set it |
| 1015 | to '333' and then set again to '1', when -var-update will report this |
| 1016 | variable as changed -- because the first assignment has set the |
| 1017 | 'updated' flag. There's no need to optimize that, because return value |
| 1018 | of -var-update should be considered an approximation. */ |
| 1019 | var->updated = install_new_value (var, val, false /* Compare values. */); |
| 1020 | input_radix = saved_input_radix; |
| 1021 | return true; |
| 1022 | } |
| 1023 | |
| 1024 | #if HAVE_PYTHON |
| 1025 | |
| 1026 | /* A helper function to install a constructor function and visualizer |
| 1027 | in a varobj_dynamic. */ |
| 1028 | |
| 1029 | static void |
| 1030 | install_visualizer (struct varobj_dynamic *var, PyObject *constructor, |
| 1031 | PyObject *visualizer) |
| 1032 | { |
| 1033 | Py_XDECREF (var->constructor); |
| 1034 | var->constructor = constructor; |
| 1035 | |
| 1036 | Py_XDECREF (var->pretty_printer); |
| 1037 | var->pretty_printer = visualizer; |
| 1038 | |
| 1039 | var->child_iter.reset (nullptr); |
| 1040 | } |
| 1041 | |
| 1042 | /* Install the default visualizer for VAR. */ |
| 1043 | |
| 1044 | static void |
| 1045 | install_default_visualizer (struct varobj *var) |
| 1046 | { |
| 1047 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
| 1048 | if (CPLUS_FAKE_CHILD (var)) |
| 1049 | return; |
| 1050 | |
| 1051 | if (pretty_printing) |
| 1052 | { |
| 1053 | gdbpy_ref<> pretty_printer; |
| 1054 | |
| 1055 | if (var->value != nullptr) |
| 1056 | { |
| 1057 | pretty_printer = gdbpy_get_varobj_pretty_printer (var->value.get ()); |
| 1058 | if (pretty_printer == nullptr) |
| 1059 | { |
| 1060 | gdbpy_print_stack (); |
| 1061 | error (_("Cannot instantiate printer for default visualizer")); |
| 1062 | } |
| 1063 | } |
| 1064 | |
| 1065 | if (pretty_printer == Py_None) |
| 1066 | pretty_printer.reset (nullptr); |
| 1067 | |
| 1068 | install_visualizer (var->dynamic, NULL, pretty_printer.release ()); |
| 1069 | } |
| 1070 | } |
| 1071 | |
| 1072 | /* Instantiate and install a visualizer for VAR using CONSTRUCTOR to |
| 1073 | make a new object. */ |
| 1074 | |
| 1075 | static void |
| 1076 | construct_visualizer (struct varobj *var, PyObject *constructor) |
| 1077 | { |
| 1078 | PyObject *pretty_printer; |
| 1079 | |
| 1080 | /* Do not install a visualizer on a CPLUS_FAKE_CHILD. */ |
| 1081 | if (CPLUS_FAKE_CHILD (var)) |
| 1082 | return; |
| 1083 | |
| 1084 | Py_INCREF (constructor); |
| 1085 | if (constructor == Py_None) |
| 1086 | pretty_printer = NULL; |
| 1087 | else |
| 1088 | { |
| 1089 | pretty_printer = instantiate_pretty_printer (constructor, |
| 1090 | var->value.get ()); |
| 1091 | if (! pretty_printer) |
| 1092 | { |
| 1093 | gdbpy_print_stack (); |
| 1094 | Py_DECREF (constructor); |
| 1095 | constructor = Py_None; |
| 1096 | Py_INCREF (constructor); |
| 1097 | } |
| 1098 | |
| 1099 | if (pretty_printer == Py_None) |
| 1100 | { |
| 1101 | Py_DECREF (pretty_printer); |
| 1102 | pretty_printer = NULL; |
| 1103 | } |
| 1104 | } |
| 1105 | |
| 1106 | install_visualizer (var->dynamic, constructor, pretty_printer); |
| 1107 | } |
| 1108 | |
| 1109 | #endif /* HAVE_PYTHON */ |
| 1110 | |
| 1111 | /* A helper function for install_new_value. This creates and installs |
| 1112 | a visualizer for VAR, if appropriate. */ |
| 1113 | |
| 1114 | static void |
| 1115 | install_new_value_visualizer (struct varobj *var) |
| 1116 | { |
| 1117 | #if HAVE_PYTHON |
| 1118 | /* If the constructor is None, then we want the raw value. If VAR |
| 1119 | does not have a value, just skip this. */ |
| 1120 | if (!gdb_python_initialized) |
| 1121 | return; |
| 1122 | |
| 1123 | if (var->dynamic->constructor != Py_None && var->value != NULL) |
| 1124 | { |
| 1125 | gdbpy_enter_varobj enter_py (var); |
| 1126 | |
| 1127 | if (var->dynamic->constructor == NULL) |
| 1128 | install_default_visualizer (var); |
| 1129 | else |
| 1130 | construct_visualizer (var, var->dynamic->constructor); |
| 1131 | } |
| 1132 | #else |
| 1133 | /* Do nothing. */ |
| 1134 | #endif |
| 1135 | } |
| 1136 | |
| 1137 | /* When using RTTI to determine variable type it may be changed in runtime when |
| 1138 | the variable value is changed. This function checks whether type of varobj |
| 1139 | VAR will change when a new value NEW_VALUE is assigned and if it is so |
| 1140 | updates the type of VAR. */ |
| 1141 | |
| 1142 | static bool |
| 1143 | update_type_if_necessary (struct varobj *var, struct value *new_value) |
| 1144 | { |
| 1145 | if (new_value) |
| 1146 | { |
| 1147 | struct value_print_options opts; |
| 1148 | |
| 1149 | get_user_print_options (&opts); |
| 1150 | if (opts.objectprint) |
| 1151 | { |
| 1152 | struct type *new_type = value_actual_type (new_value, 0, 0); |
| 1153 | std::string new_type_str = type_to_string (new_type); |
| 1154 | std::string curr_type_str = varobj_get_type (var); |
| 1155 | |
| 1156 | /* Did the type name change? */ |
| 1157 | if (curr_type_str != new_type_str) |
| 1158 | { |
| 1159 | var->type = new_type; |
| 1160 | |
| 1161 | /* This information may be not valid for a new type. */ |
| 1162 | varobj_delete (var, 1); |
| 1163 | var->children.clear (); |
| 1164 | var->num_children = -1; |
| 1165 | return true; |
| 1166 | } |
| 1167 | } |
| 1168 | } |
| 1169 | |
| 1170 | return false; |
| 1171 | } |
| 1172 | |
| 1173 | /* Assign a new value to a variable object. If INITIAL is true, |
| 1174 | this is the first assignment after the variable object was just |
| 1175 | created, or changed type. In that case, just assign the value |
| 1176 | and return false. |
| 1177 | Otherwise, assign the new value, and return true if the value is |
| 1178 | different from the current one, false otherwise. The comparison is |
| 1179 | done on textual representation of value. Therefore, some types |
| 1180 | need not be compared. E.g. for structures the reported value is |
| 1181 | always "{...}", so no comparison is necessary here. If the old |
| 1182 | value was NULL and new one is not, or vice versa, we always return true. |
| 1183 | |
| 1184 | The VALUE parameter should not be released -- the function will |
| 1185 | take care of releasing it when needed. */ |
| 1186 | static bool |
| 1187 | install_new_value (struct varobj *var, struct value *value, bool initial) |
| 1188 | { |
| 1189 | bool changeable; |
| 1190 | bool need_to_fetch; |
| 1191 | bool changed = false; |
| 1192 | bool intentionally_not_fetched = false; |
| 1193 | |
| 1194 | /* We need to know the varobj's type to decide if the value should |
| 1195 | be fetched or not. C++ fake children (public/protected/private) |
| 1196 | don't have a type. */ |
| 1197 | gdb_assert (var->type || CPLUS_FAKE_CHILD (var)); |
| 1198 | changeable = varobj_value_is_changeable_p (var); |
| 1199 | |
| 1200 | /* If the type has custom visualizer, we consider it to be always |
| 1201 | changeable. FIXME: need to make sure this behaviour will not |
| 1202 | mess up read-sensitive values. */ |
| 1203 | if (var->dynamic->pretty_printer != NULL) |
| 1204 | changeable = true; |
| 1205 | |
| 1206 | need_to_fetch = changeable; |
| 1207 | |
| 1208 | /* We are not interested in the address of references, and given |
| 1209 | that in C++ a reference is not rebindable, it cannot |
| 1210 | meaningfully change. So, get hold of the real value. */ |
| 1211 | if (value) |
| 1212 | value = coerce_ref (value); |
| 1213 | |
| 1214 | if (var->type && var->type->code () == TYPE_CODE_UNION) |
| 1215 | /* For unions, we need to fetch the value implicitly because |
| 1216 | of implementation of union member fetch. When gdb |
| 1217 | creates a value for a field and the value of the enclosing |
| 1218 | structure is not lazy, it immediately copies the necessary |
| 1219 | bytes from the enclosing values. If the enclosing value is |
| 1220 | lazy, the call to value_fetch_lazy on the field will read |
| 1221 | the data from memory. For unions, that means we'll read the |
| 1222 | same memory more than once, which is not desirable. So |
| 1223 | fetch now. */ |
| 1224 | need_to_fetch = true; |
| 1225 | |
| 1226 | /* The new value might be lazy. If the type is changeable, |
| 1227 | that is we'll be comparing values of this type, fetch the |
| 1228 | value now. Otherwise, on the next update the old value |
| 1229 | will be lazy, which means we've lost that old value. */ |
| 1230 | if (need_to_fetch && value && value_lazy (value)) |
| 1231 | { |
| 1232 | const struct varobj *parent = var->parent; |
| 1233 | bool frozen = var->frozen; |
| 1234 | |
| 1235 | for (; !frozen && parent; parent = parent->parent) |
| 1236 | frozen |= parent->frozen; |
| 1237 | |
| 1238 | if (frozen && initial) |
| 1239 | { |
| 1240 | /* For variables that are frozen, or are children of frozen |
| 1241 | variables, we don't do fetch on initial assignment. |
| 1242 | For non-initial assignment we do the fetch, since it means we're |
| 1243 | explicitly asked to compare the new value with the old one. */ |
| 1244 | intentionally_not_fetched = true; |
| 1245 | } |
| 1246 | else |
| 1247 | { |
| 1248 | |
| 1249 | try |
| 1250 | { |
| 1251 | value_fetch_lazy (value); |
| 1252 | } |
| 1253 | |
| 1254 | catch (const gdb_exception_error &except) |
| 1255 | { |
| 1256 | /* Set the value to NULL, so that for the next -var-update, |
| 1257 | we don't try to compare the new value with this value, |
| 1258 | that we couldn't even read. */ |
| 1259 | value = NULL; |
| 1260 | } |
| 1261 | } |
| 1262 | } |
| 1263 | |
| 1264 | /* Get a reference now, before possibly passing it to any Python |
| 1265 | code that might release it. */ |
| 1266 | value_ref_ptr value_holder; |
| 1267 | if (value != NULL) |
| 1268 | value_holder = value_ref_ptr::new_reference (value); |
| 1269 | |
| 1270 | /* Below, we'll be comparing string rendering of old and new |
| 1271 | values. Don't get string rendering if the value is |
| 1272 | lazy -- if it is, the code above has decided that the value |
| 1273 | should not be fetched. */ |
| 1274 | std::string print_value; |
| 1275 | if (value != NULL && !value_lazy (value) |
| 1276 | && var->dynamic->pretty_printer == NULL) |
| 1277 | print_value = varobj_value_get_print_value (value, var->format, var); |
| 1278 | |
| 1279 | /* If the type is changeable, compare the old and the new values. |
| 1280 | If this is the initial assignment, we don't have any old value |
| 1281 | to compare with. */ |
| 1282 | if (!initial && changeable) |
| 1283 | { |
| 1284 | /* If the value of the varobj was changed by -var-set-value, |
| 1285 | then the value in the varobj and in the target is the same. |
| 1286 | However, that value is different from the value that the |
| 1287 | varobj had after the previous -var-update. So need to the |
| 1288 | varobj as changed. */ |
| 1289 | if (var->updated) |
| 1290 | changed = true; |
| 1291 | else if (var->dynamic->pretty_printer == NULL) |
| 1292 | { |
| 1293 | /* Try to compare the values. That requires that both |
| 1294 | values are non-lazy. */ |
| 1295 | if (var->not_fetched && value_lazy (var->value.get ())) |
| 1296 | { |
| 1297 | /* This is a frozen varobj and the value was never read. |
| 1298 | Presumably, UI shows some "never read" indicator. |
| 1299 | Now that we've fetched the real value, we need to report |
| 1300 | this varobj as changed so that UI can show the real |
| 1301 | value. */ |
| 1302 | changed = true; |
| 1303 | } |
| 1304 | else if (var->value == NULL && value == NULL) |
| 1305 | /* Equal. */ |
| 1306 | ; |
| 1307 | else if (var->value == NULL || value == NULL) |
| 1308 | { |
| 1309 | changed = true; |
| 1310 | } |
| 1311 | else |
| 1312 | { |
| 1313 | gdb_assert (!value_lazy (var->value.get ())); |
| 1314 | gdb_assert (!value_lazy (value)); |
| 1315 | |
| 1316 | gdb_assert (!var->print_value.empty () && !print_value.empty ()); |
| 1317 | if (var->print_value != print_value) |
| 1318 | changed = true; |
| 1319 | } |
| 1320 | } |
| 1321 | } |
| 1322 | |
| 1323 | if (!initial && !changeable) |
| 1324 | { |
| 1325 | /* For values that are not changeable, we don't compare the values. |
| 1326 | However, we want to notice if a value was not NULL and now is NULL, |
| 1327 | or vise versa, so that we report when top-level varobjs come in scope |
| 1328 | and leave the scope. */ |
| 1329 | changed = (var->value != NULL) != (value != NULL); |
| 1330 | } |
| 1331 | |
| 1332 | /* We must always keep the new value, since children depend on it. */ |
| 1333 | var->value = value_holder; |
| 1334 | if (value && value_lazy (value) && intentionally_not_fetched) |
| 1335 | var->not_fetched = true; |
| 1336 | else |
| 1337 | var->not_fetched = false; |
| 1338 | var->updated = false; |
| 1339 | |
| 1340 | install_new_value_visualizer (var); |
| 1341 | |
| 1342 | /* If we installed a pretty-printer, re-compare the printed version |
| 1343 | to see if the variable changed. */ |
| 1344 | if (var->dynamic->pretty_printer != NULL) |
| 1345 | { |
| 1346 | print_value = varobj_value_get_print_value (var->value.get (), |
| 1347 | var->format, var); |
| 1348 | if ((var->print_value.empty () && !print_value.empty ()) |
| 1349 | || (!var->print_value.empty () && print_value.empty ()) |
| 1350 | || (!var->print_value.empty () && !print_value.empty () |
| 1351 | && var->print_value != print_value)) |
| 1352 | changed = true; |
| 1353 | } |
| 1354 | var->print_value = print_value; |
| 1355 | |
| 1356 | gdb_assert (var->value == nullptr || value_type (var->value.get ())); |
| 1357 | |
| 1358 | return changed; |
| 1359 | } |
| 1360 | |
| 1361 | /* Return the requested range for a varobj. VAR is the varobj. FROM |
| 1362 | and TO are out parameters; *FROM and *TO will be set to the |
| 1363 | selected sub-range of VAR. If no range was selected using |
| 1364 | -var-set-update-range, then both will be -1. */ |
| 1365 | void |
| 1366 | varobj_get_child_range (const struct varobj *var, int *from, int *to) |
| 1367 | { |
| 1368 | *from = var->from; |
| 1369 | *to = var->to; |
| 1370 | } |
| 1371 | |
| 1372 | /* Set the selected sub-range of children of VAR to start at index |
| 1373 | FROM and end at index TO. If either FROM or TO is less than zero, |
| 1374 | this is interpreted as a request for all children. */ |
| 1375 | void |
| 1376 | varobj_set_child_range (struct varobj *var, int from, int to) |
| 1377 | { |
| 1378 | var->from = from; |
| 1379 | var->to = to; |
| 1380 | } |
| 1381 | |
| 1382 | void |
| 1383 | varobj_set_visualizer (struct varobj *var, const char *visualizer) |
| 1384 | { |
| 1385 | #if HAVE_PYTHON |
| 1386 | PyObject *mainmod; |
| 1387 | |
| 1388 | if (!gdb_python_initialized) |
| 1389 | return; |
| 1390 | |
| 1391 | gdbpy_enter_varobj enter_py (var); |
| 1392 | |
| 1393 | mainmod = PyImport_AddModule ("__main__"); |
| 1394 | gdbpy_ref<> globals |
| 1395 | = gdbpy_ref<>::new_reference (PyModule_GetDict (mainmod)); |
| 1396 | gdbpy_ref<> constructor (PyRun_String (visualizer, Py_eval_input, |
| 1397 | globals.get (), globals.get ())); |
| 1398 | |
| 1399 | if (constructor == NULL) |
| 1400 | { |
| 1401 | gdbpy_print_stack (); |
| 1402 | error (_("Could not evaluate visualizer expression: %s"), visualizer); |
| 1403 | } |
| 1404 | |
| 1405 | construct_visualizer (var, constructor.get ()); |
| 1406 | |
| 1407 | /* If there are any children now, wipe them. */ |
| 1408 | varobj_delete (var, 1 /* children only */); |
| 1409 | var->num_children = -1; |
| 1410 | #else |
| 1411 | error (_("Python support required")); |
| 1412 | #endif |
| 1413 | } |
| 1414 | |
| 1415 | /* If NEW_VALUE is the new value of the given varobj (var), return |
| 1416 | true if var has mutated. In other words, if the type of |
| 1417 | the new value is different from the type of the varobj's old |
| 1418 | value. |
| 1419 | |
| 1420 | NEW_VALUE may be NULL, if the varobj is now out of scope. */ |
| 1421 | |
| 1422 | static bool |
| 1423 | varobj_value_has_mutated (const struct varobj *var, struct value *new_value, |
| 1424 | struct type *new_type) |
| 1425 | { |
| 1426 | /* If we haven't previously computed the number of children in var, |
| 1427 | it does not matter from the front-end's perspective whether |
| 1428 | the type has mutated or not. For all intents and purposes, |
| 1429 | it has not mutated. */ |
| 1430 | if (var->num_children < 0) |
| 1431 | return false; |
| 1432 | |
| 1433 | if (var->root->lang_ops->value_has_mutated != NULL) |
| 1434 | { |
| 1435 | /* The varobj module, when installing new values, explicitly strips |
| 1436 | references, saying that we're not interested in those addresses. |
| 1437 | But detection of mutation happens before installing the new |
| 1438 | value, so our value may be a reference that we need to strip |
| 1439 | in order to remain consistent. */ |
| 1440 | if (new_value != NULL) |
| 1441 | new_value = coerce_ref (new_value); |
| 1442 | return var->root->lang_ops->value_has_mutated (var, new_value, new_type); |
| 1443 | } |
| 1444 | else |
| 1445 | return false; |
| 1446 | } |
| 1447 | |
| 1448 | /* Update the values for a variable and its children. This is a |
| 1449 | two-pronged attack. First, re-parse the value for the root's |
| 1450 | expression to see if it's changed. Then go all the way |
| 1451 | through its children, reconstructing them and noting if they've |
| 1452 | changed. |
| 1453 | |
| 1454 | The IS_EXPLICIT parameter specifies if this call is result |
| 1455 | of MI request to update this specific variable, or |
| 1456 | result of implicit -var-update *. For implicit request, we don't |
| 1457 | update frozen variables. |
| 1458 | |
| 1459 | NOTE: This function may delete the caller's varobj. If it |
| 1460 | returns TYPE_CHANGED, then it has done this and VARP will be modified |
| 1461 | to point to the new varobj. */ |
| 1462 | |
| 1463 | std::vector<varobj_update_result> |
| 1464 | varobj_update (struct varobj **varp, bool is_explicit) |
| 1465 | { |
| 1466 | bool type_changed = false; |
| 1467 | struct value *newobj; |
| 1468 | std::vector<varobj_update_result> stack; |
| 1469 | std::vector<varobj_update_result> result; |
| 1470 | |
| 1471 | /* Frozen means frozen -- we don't check for any change in |
| 1472 | this varobj, including its going out of scope, or |
| 1473 | changing type. One use case for frozen varobjs is |
| 1474 | retaining previously evaluated expressions, and we don't |
| 1475 | want them to be reevaluated at all. */ |
| 1476 | if (!is_explicit && (*varp)->frozen) |
| 1477 | return result; |
| 1478 | |
| 1479 | if (!(*varp)->root->is_valid) |
| 1480 | { |
| 1481 | result.emplace_back (*varp, VAROBJ_INVALID); |
| 1482 | return result; |
| 1483 | } |
| 1484 | |
| 1485 | if ((*varp)->root->rootvar == *varp) |
| 1486 | { |
| 1487 | varobj_update_result r (*varp); |
| 1488 | |
| 1489 | /* Update the root variable. value_of_root can return NULL |
| 1490 | if the variable is no longer around, i.e. we stepped out of |
| 1491 | the frame in which a local existed. We are letting the |
| 1492 | value_of_root variable dispose of the varobj if the type |
| 1493 | has changed. */ |
| 1494 | newobj = value_of_root (varp, &type_changed); |
| 1495 | if (update_type_if_necessary (*varp, newobj)) |
| 1496 | type_changed = true; |
| 1497 | r.varobj = *varp; |
| 1498 | r.type_changed = type_changed; |
| 1499 | if (install_new_value ((*varp), newobj, type_changed)) |
| 1500 | r.changed = true; |
| 1501 | |
| 1502 | if (newobj == NULL) |
| 1503 | r.status = VAROBJ_NOT_IN_SCOPE; |
| 1504 | r.value_installed = true; |
| 1505 | |
| 1506 | if (r.status == VAROBJ_NOT_IN_SCOPE) |
| 1507 | { |
| 1508 | if (r.type_changed || r.changed) |
| 1509 | result.push_back (std::move (r)); |
| 1510 | |
| 1511 | return result; |
| 1512 | } |
| 1513 | |
| 1514 | stack.push_back (std::move (r)); |
| 1515 | } |
| 1516 | else |
| 1517 | stack.emplace_back (*varp); |
| 1518 | |
| 1519 | /* Walk through the children, reconstructing them all. */ |
| 1520 | while (!stack.empty ()) |
| 1521 | { |
| 1522 | varobj_update_result r = std::move (stack.back ()); |
| 1523 | stack.pop_back (); |
| 1524 | struct varobj *v = r.varobj; |
| 1525 | |
| 1526 | /* Update this variable, unless it's a root, which is already |
| 1527 | updated. */ |
| 1528 | if (!r.value_installed) |
| 1529 | { |
| 1530 | struct type *new_type; |
| 1531 | |
| 1532 | newobj = value_of_child (v->parent, v->index); |
| 1533 | if (update_type_if_necessary (v, newobj)) |
| 1534 | r.type_changed = true; |
| 1535 | if (newobj) |
| 1536 | new_type = value_type (newobj); |
| 1537 | else |
| 1538 | new_type = v->root->lang_ops->type_of_child (v->parent, v->index); |
| 1539 | |
| 1540 | if (varobj_value_has_mutated (v, newobj, new_type)) |
| 1541 | { |
| 1542 | /* The children are no longer valid; delete them now. |
| 1543 | Report the fact that its type changed as well. */ |
| 1544 | varobj_delete (v, 1 /* only_children */); |
| 1545 | v->num_children = -1; |
| 1546 | v->to = -1; |
| 1547 | v->from = -1; |
| 1548 | v->type = new_type; |
| 1549 | r.type_changed = true; |
| 1550 | } |
| 1551 | |
| 1552 | if (install_new_value (v, newobj, r.type_changed)) |
| 1553 | { |
| 1554 | r.changed = true; |
| 1555 | v->updated = false; |
| 1556 | } |
| 1557 | } |
| 1558 | |
| 1559 | /* We probably should not get children of a dynamic varobj, but |
| 1560 | for which -var-list-children was never invoked. */ |
| 1561 | if (varobj_is_dynamic_p (v)) |
| 1562 | { |
| 1563 | std::vector<varobj *> changed, type_changed_vec, unchanged, newobj_vec; |
| 1564 | bool children_changed = false; |
| 1565 | |
| 1566 | if (v->frozen) |
| 1567 | continue; |
| 1568 | |
| 1569 | if (!v->dynamic->children_requested) |
| 1570 | { |
| 1571 | bool dummy; |
| 1572 | |
| 1573 | /* If we initially did not have potential children, but |
| 1574 | now we do, consider the varobj as changed. |
| 1575 | Otherwise, if children were never requested, consider |
| 1576 | it as unchanged -- presumably, such varobj is not yet |
| 1577 | expanded in the UI, so we need not bother getting |
| 1578 | it. */ |
| 1579 | if (!varobj_has_more (v, 0)) |
| 1580 | { |
| 1581 | update_dynamic_varobj_children (v, NULL, NULL, NULL, NULL, |
| 1582 | &dummy, false, 0, 0); |
| 1583 | if (varobj_has_more (v, 0)) |
| 1584 | r.changed = true; |
| 1585 | } |
| 1586 | |
| 1587 | if (r.changed) |
| 1588 | result.push_back (std::move (r)); |
| 1589 | |
| 1590 | continue; |
| 1591 | } |
| 1592 | |
| 1593 | /* If update_dynamic_varobj_children returns false, then we have |
| 1594 | a non-conforming pretty-printer, so we skip it. */ |
| 1595 | if (update_dynamic_varobj_children (v, &changed, &type_changed_vec, |
| 1596 | &newobj_vec, |
| 1597 | &unchanged, &children_changed, |
| 1598 | true, v->from, v->to)) |
| 1599 | { |
| 1600 | if (children_changed || !newobj_vec.empty ()) |
| 1601 | { |
| 1602 | r.children_changed = true; |
| 1603 | r.newobj = std::move (newobj_vec); |
| 1604 | } |
| 1605 | /* Push in reverse order so that the first child is |
| 1606 | popped from the work stack first, and so will be |
| 1607 | added to result first. This does not affect |
| 1608 | correctness, just "nicer". */ |
| 1609 | for (int i = type_changed_vec.size () - 1; i >= 0; --i) |
| 1610 | { |
| 1611 | varobj_update_result item (type_changed_vec[i]); |
| 1612 | |
| 1613 | /* Type may change only if value was changed. */ |
| 1614 | item.changed = true; |
| 1615 | item.type_changed = true; |
| 1616 | item.value_installed = true; |
| 1617 | |
| 1618 | stack.push_back (std::move (item)); |
| 1619 | } |
| 1620 | for (int i = changed.size () - 1; i >= 0; --i) |
| 1621 | { |
| 1622 | varobj_update_result item (changed[i]); |
| 1623 | |
| 1624 | item.changed = true; |
| 1625 | item.value_installed = true; |
| 1626 | |
| 1627 | stack.push_back (std::move (item)); |
| 1628 | } |
| 1629 | for (int i = unchanged.size () - 1; i >= 0; --i) |
| 1630 | { |
| 1631 | if (!unchanged[i]->frozen) |
| 1632 | { |
| 1633 | varobj_update_result item (unchanged[i]); |
| 1634 | |
| 1635 | item.value_installed = true; |
| 1636 | |
| 1637 | stack.push_back (std::move (item)); |
| 1638 | } |
| 1639 | } |
| 1640 | if (r.changed || r.children_changed) |
| 1641 | result.push_back (std::move (r)); |
| 1642 | |
| 1643 | continue; |
| 1644 | } |
| 1645 | } |
| 1646 | |
| 1647 | /* Push any children. Use reverse order so that the first |
| 1648 | child is popped from the work stack first, and so |
| 1649 | will be added to result first. This does not |
| 1650 | affect correctness, just "nicer". */ |
| 1651 | for (int i = v->children.size () - 1; i >= 0; --i) |
| 1652 | { |
| 1653 | varobj *c = v->children[i]; |
| 1654 | |
| 1655 | /* Child may be NULL if explicitly deleted by -var-delete. */ |
| 1656 | if (c != NULL && !c->frozen) |
| 1657 | stack.emplace_back (c); |
| 1658 | } |
| 1659 | |
| 1660 | if (r.changed || r.type_changed) |
| 1661 | result.push_back (std::move (r)); |
| 1662 | } |
| 1663 | |
| 1664 | return result; |
| 1665 | } |
| 1666 | |
| 1667 | /* Helper functions */ |
| 1668 | |
| 1669 | /* |
| 1670 | * Variable object construction/destruction |
| 1671 | */ |
| 1672 | |
| 1673 | static int |
| 1674 | delete_variable (struct varobj *var, bool only_children_p) |
| 1675 | { |
| 1676 | int delcount = 0; |
| 1677 | |
| 1678 | delete_variable_1 (&delcount, var, only_children_p, |
| 1679 | true /* remove_from_parent_p */ ); |
| 1680 | |
| 1681 | return delcount; |
| 1682 | } |
| 1683 | |
| 1684 | /* Delete the variable object VAR and its children. */ |
| 1685 | /* IMPORTANT NOTE: If we delete a variable which is a child |
| 1686 | and the parent is not removed we dump core. It must be always |
| 1687 | initially called with remove_from_parent_p set. */ |
| 1688 | static void |
| 1689 | delete_variable_1 (int *delcountp, struct varobj *var, bool only_children_p, |
| 1690 | bool remove_from_parent_p) |
| 1691 | { |
| 1692 | /* Delete any children of this variable, too. */ |
| 1693 | for (varobj *child : var->children) |
| 1694 | { |
| 1695 | if (!child) |
| 1696 | continue; |
| 1697 | |
| 1698 | if (!remove_from_parent_p) |
| 1699 | child->parent = NULL; |
| 1700 | |
| 1701 | delete_variable_1 (delcountp, child, false, only_children_p); |
| 1702 | } |
| 1703 | var->children.clear (); |
| 1704 | |
| 1705 | /* if we were called to delete only the children we are done here. */ |
| 1706 | if (only_children_p) |
| 1707 | return; |
| 1708 | |
| 1709 | /* Otherwise, add it to the list of deleted ones and proceed to do so. */ |
| 1710 | /* If the name is empty, this is a temporary variable, that has not |
| 1711 | yet been installed, don't report it, it belongs to the caller... */ |
| 1712 | if (!var->obj_name.empty ()) |
| 1713 | { |
| 1714 | *delcountp = *delcountp + 1; |
| 1715 | } |
| 1716 | |
| 1717 | /* If this variable has a parent, remove it from its parent's list. */ |
| 1718 | /* OPTIMIZATION: if the parent of this variable is also being deleted, |
| 1719 | (as indicated by remove_from_parent_p) we don't bother doing an |
| 1720 | expensive list search to find the element to remove when we are |
| 1721 | discarding the list afterwards. */ |
| 1722 | if ((remove_from_parent_p) && (var->parent != NULL)) |
| 1723 | var->parent->children[var->index] = NULL; |
| 1724 | |
| 1725 | if (!var->obj_name.empty ()) |
| 1726 | uninstall_variable (var); |
| 1727 | |
| 1728 | /* Free memory associated with this variable. */ |
| 1729 | delete var; |
| 1730 | } |
| 1731 | |
| 1732 | /* Install the given variable VAR with the object name VAR->OBJ_NAME. */ |
| 1733 | static void |
| 1734 | install_variable (struct varobj *var) |
| 1735 | { |
| 1736 | hashval_t hash = htab_hash_string (var->obj_name.c_str ()); |
| 1737 | void **slot = htab_find_slot_with_hash (varobj_table, |
| 1738 | var->obj_name.c_str (), |
| 1739 | hash, INSERT); |
| 1740 | if (*slot != nullptr) |
| 1741 | error (_("Duplicate variable object name")); |
| 1742 | |
| 1743 | /* Add varobj to hash table. */ |
| 1744 | *slot = var; |
| 1745 | |
| 1746 | /* If root, add varobj to root list. */ |
| 1747 | if (is_root_p (var)) |
| 1748 | rootlist.push_front (var->root); |
| 1749 | } |
| 1750 | |
| 1751 | /* Uninstall the object VAR. */ |
| 1752 | static void |
| 1753 | uninstall_variable (struct varobj *var) |
| 1754 | { |
| 1755 | hashval_t hash = htab_hash_string (var->obj_name.c_str ()); |
| 1756 | htab_remove_elt_with_hash (varobj_table, var->obj_name.c_str (), hash); |
| 1757 | |
| 1758 | if (varobjdebug) |
| 1759 | fprintf_unfiltered (gdb_stdlog, "Deleting %s\n", var->obj_name.c_str ()); |
| 1760 | |
| 1761 | /* If root, remove varobj from root list. */ |
| 1762 | if (is_root_p (var)) |
| 1763 | { |
| 1764 | auto iter = std::find (rootlist.begin (), rootlist.end (), var->root); |
| 1765 | rootlist.erase (iter); |
| 1766 | } |
| 1767 | } |
| 1768 | |
| 1769 | /* Create and install a child of the parent of the given name. |
| 1770 | |
| 1771 | The created VAROBJ takes ownership of the allocated NAME. */ |
| 1772 | |
| 1773 | static struct varobj * |
| 1774 | create_child (struct varobj *parent, int index, std::string &name) |
| 1775 | { |
| 1776 | struct varobj_item item; |
| 1777 | |
| 1778 | std::swap (item.name, name); |
| 1779 | item.value = release_value (value_of_child (parent, index)); |
| 1780 | |
| 1781 | return create_child_with_value (parent, index, &item); |
| 1782 | } |
| 1783 | |
| 1784 | static struct varobj * |
| 1785 | create_child_with_value (struct varobj *parent, int index, |
| 1786 | struct varobj_item *item) |
| 1787 | { |
| 1788 | varobj *child = new varobj (parent->root); |
| 1789 | |
| 1790 | /* NAME is allocated by caller. */ |
| 1791 | std::swap (child->name, item->name); |
| 1792 | child->index = index; |
| 1793 | child->parent = parent; |
| 1794 | |
| 1795 | if (varobj_is_anonymous_child (child)) |
| 1796 | child->obj_name = string_printf ("%s.%d_anonymous", |
| 1797 | parent->obj_name.c_str (), index); |
| 1798 | else |
| 1799 | child->obj_name = string_printf ("%s.%s", |
| 1800 | parent->obj_name.c_str (), |
| 1801 | child->name.c_str ()); |
| 1802 | |
| 1803 | install_variable (child); |
| 1804 | |
| 1805 | /* Compute the type of the child. Must do this before |
| 1806 | calling install_new_value. */ |
| 1807 | if (item->value != NULL) |
| 1808 | /* If the child had no evaluation errors, var->value |
| 1809 | will be non-NULL and contain a valid type. */ |
| 1810 | child->type = value_actual_type (item->value.get (), 0, NULL); |
| 1811 | else |
| 1812 | /* Otherwise, we must compute the type. */ |
| 1813 | child->type = (*child->root->lang_ops->type_of_child) (child->parent, |
| 1814 | child->index); |
| 1815 | install_new_value (child, item->value.get (), 1); |
| 1816 | |
| 1817 | return child; |
| 1818 | } |
| 1819 | \f |
| 1820 | |
| 1821 | /* |
| 1822 | * Miscellaneous utility functions. |
| 1823 | */ |
| 1824 | |
| 1825 | /* Allocate memory and initialize a new variable. */ |
| 1826 | varobj::varobj (varobj_root *root_) |
| 1827 | : root (root_), dynamic (new varobj_dynamic) |
| 1828 | { |
| 1829 | } |
| 1830 | |
| 1831 | /* Free any allocated memory associated with VAR. */ |
| 1832 | |
| 1833 | varobj::~varobj () |
| 1834 | { |
| 1835 | varobj *var = this; |
| 1836 | |
| 1837 | #if HAVE_PYTHON |
| 1838 | if (var->dynamic->pretty_printer != NULL) |
| 1839 | { |
| 1840 | gdbpy_enter_varobj enter_py (var); |
| 1841 | |
| 1842 | Py_XDECREF (var->dynamic->constructor); |
| 1843 | Py_XDECREF (var->dynamic->pretty_printer); |
| 1844 | } |
| 1845 | #endif |
| 1846 | |
| 1847 | if (is_root_p (var)) |
| 1848 | delete var->root; |
| 1849 | |
| 1850 | delete var->dynamic; |
| 1851 | } |
| 1852 | |
| 1853 | /* Return the type of the value that's stored in VAR, |
| 1854 | or that would have being stored there if the |
| 1855 | value were accessible. |
| 1856 | |
| 1857 | This differs from VAR->type in that VAR->type is always |
| 1858 | the true type of the expression in the source language. |
| 1859 | The return value of this function is the type we're |
| 1860 | actually storing in varobj, and using for displaying |
| 1861 | the values and for comparing previous and new values. |
| 1862 | |
| 1863 | For example, top-level references are always stripped. */ |
| 1864 | struct type * |
| 1865 | varobj_get_value_type (const struct varobj *var) |
| 1866 | { |
| 1867 | struct type *type; |
| 1868 | |
| 1869 | if (var->value != nullptr) |
| 1870 | type = value_type (var->value.get ()); |
| 1871 | else |
| 1872 | type = var->type; |
| 1873 | |
| 1874 | type = check_typedef (type); |
| 1875 | |
| 1876 | if (TYPE_IS_REFERENCE (type)) |
| 1877 | type = get_target_type (type); |
| 1878 | |
| 1879 | type = check_typedef (type); |
| 1880 | |
| 1881 | return type; |
| 1882 | } |
| 1883 | |
| 1884 | /* What is the default display for this variable? We assume that |
| 1885 | everything is "natural". Any exceptions? */ |
| 1886 | static enum varobj_display_formats |
| 1887 | variable_default_display (struct varobj *var) |
| 1888 | { |
| 1889 | return FORMAT_NATURAL; |
| 1890 | } |
| 1891 | |
| 1892 | /* |
| 1893 | * Language-dependencies |
| 1894 | */ |
| 1895 | |
| 1896 | /* Common entry points */ |
| 1897 | |
| 1898 | /* Return the number of children for a given variable. |
| 1899 | The result of this function is defined by the language |
| 1900 | implementation. The number of children returned by this function |
| 1901 | is the number of children that the user will see in the variable |
| 1902 | display. */ |
| 1903 | static int |
| 1904 | number_of_children (const struct varobj *var) |
| 1905 | { |
| 1906 | return (*var->root->lang_ops->number_of_children) (var); |
| 1907 | } |
| 1908 | |
| 1909 | /* What is the expression for the root varobj VAR? */ |
| 1910 | |
| 1911 | static std::string |
| 1912 | name_of_variable (const struct varobj *var) |
| 1913 | { |
| 1914 | return (*var->root->lang_ops->name_of_variable) (var); |
| 1915 | } |
| 1916 | |
| 1917 | /* What is the name of the INDEX'th child of VAR? */ |
| 1918 | |
| 1919 | static std::string |
| 1920 | name_of_child (struct varobj *var, int index) |
| 1921 | { |
| 1922 | return (*var->root->lang_ops->name_of_child) (var, index); |
| 1923 | } |
| 1924 | |
| 1925 | /* If frame associated with VAR can be found, switch |
| 1926 | to it and return true. Otherwise, return false. */ |
| 1927 | |
| 1928 | static bool |
| 1929 | check_scope (const struct varobj *var) |
| 1930 | { |
| 1931 | struct frame_info *fi; |
| 1932 | bool scope; |
| 1933 | |
| 1934 | fi = frame_find_by_id (var->root->frame); |
| 1935 | scope = fi != NULL; |
| 1936 | |
| 1937 | if (fi) |
| 1938 | { |
| 1939 | CORE_ADDR pc = get_frame_pc (fi); |
| 1940 | |
| 1941 | if (pc < BLOCK_START (var->root->valid_block) || |
| 1942 | pc >= BLOCK_END (var->root->valid_block)) |
| 1943 | scope = false; |
| 1944 | else |
| 1945 | select_frame (fi); |
| 1946 | } |
| 1947 | return scope; |
| 1948 | } |
| 1949 | |
| 1950 | /* Helper function to value_of_root. */ |
| 1951 | |
| 1952 | static struct value * |
| 1953 | value_of_root_1 (struct varobj **var_handle) |
| 1954 | { |
| 1955 | struct value *new_val = NULL; |
| 1956 | struct varobj *var = *var_handle; |
| 1957 | bool within_scope = false; |
| 1958 | |
| 1959 | /* Only root variables can be updated... */ |
| 1960 | if (!is_root_p (var)) |
| 1961 | /* Not a root var. */ |
| 1962 | return NULL; |
| 1963 | |
| 1964 | scoped_restore_current_thread restore_thread; |
| 1965 | |
| 1966 | /* Determine whether the variable is still around. */ |
| 1967 | if (var->root->valid_block == NULL || var->root->floating) |
| 1968 | within_scope = true; |
| 1969 | else if (var->root->thread_id == 0) |
| 1970 | { |
| 1971 | /* The program was single-threaded when the variable object was |
| 1972 | created. Technically, it's possible that the program became |
| 1973 | multi-threaded since then, but we don't support such |
| 1974 | scenario yet. */ |
| 1975 | within_scope = check_scope (var); |
| 1976 | } |
| 1977 | else |
| 1978 | { |
| 1979 | thread_info *thread = find_thread_global_id (var->root->thread_id); |
| 1980 | |
| 1981 | if (thread != NULL) |
| 1982 | { |
| 1983 | switch_to_thread (thread); |
| 1984 | within_scope = check_scope (var); |
| 1985 | } |
| 1986 | } |
| 1987 | |
| 1988 | if (within_scope) |
| 1989 | { |
| 1990 | |
| 1991 | /* We need to catch errors here, because if evaluate |
| 1992 | expression fails we want to just return NULL. */ |
| 1993 | try |
| 1994 | { |
| 1995 | new_val = evaluate_expression (var->root->exp.get ()); |
| 1996 | } |
| 1997 | catch (const gdb_exception_error &except) |
| 1998 | { |
| 1999 | } |
| 2000 | } |
| 2001 | |
| 2002 | return new_val; |
| 2003 | } |
| 2004 | |
| 2005 | /* What is the ``struct value *'' of the root variable VAR? |
| 2006 | For floating variable object, evaluation can get us a value |
| 2007 | of different type from what is stored in varobj already. In |
| 2008 | that case: |
| 2009 | - *type_changed will be set to 1 |
| 2010 | - old varobj will be freed, and new one will be |
| 2011 | created, with the same name. |
| 2012 | - *var_handle will be set to the new varobj |
| 2013 | Otherwise, *type_changed will be set to 0. */ |
| 2014 | static struct value * |
| 2015 | value_of_root (struct varobj **var_handle, bool *type_changed) |
| 2016 | { |
| 2017 | struct varobj *var; |
| 2018 | |
| 2019 | if (var_handle == NULL) |
| 2020 | return NULL; |
| 2021 | |
| 2022 | var = *var_handle; |
| 2023 | |
| 2024 | /* This should really be an exception, since this should |
| 2025 | only get called with a root variable. */ |
| 2026 | |
| 2027 | if (!is_root_p (var)) |
| 2028 | return NULL; |
| 2029 | |
| 2030 | if (var->root->floating) |
| 2031 | { |
| 2032 | struct varobj *tmp_var; |
| 2033 | |
| 2034 | tmp_var = varobj_create (NULL, var->name.c_str (), (CORE_ADDR) 0, |
| 2035 | USE_SELECTED_FRAME); |
| 2036 | if (tmp_var == NULL) |
| 2037 | { |
| 2038 | return NULL; |
| 2039 | } |
| 2040 | std::string old_type = varobj_get_type (var); |
| 2041 | std::string new_type = varobj_get_type (tmp_var); |
| 2042 | if (old_type == new_type) |
| 2043 | { |
| 2044 | /* The expression presently stored inside var->root->exp |
| 2045 | remembers the locations of local variables relatively to |
| 2046 | the frame where the expression was created (in DWARF location |
| 2047 | button, for example). Naturally, those locations are not |
| 2048 | correct in other frames, so update the expression. */ |
| 2049 | |
| 2050 | std::swap (var->root->exp, tmp_var->root->exp); |
| 2051 | |
| 2052 | varobj_delete (tmp_var, 0); |
| 2053 | *type_changed = 0; |
| 2054 | } |
| 2055 | else |
| 2056 | { |
| 2057 | tmp_var->obj_name = var->obj_name; |
| 2058 | tmp_var->from = var->from; |
| 2059 | tmp_var->to = var->to; |
| 2060 | varobj_delete (var, 0); |
| 2061 | |
| 2062 | install_variable (tmp_var); |
| 2063 | *var_handle = tmp_var; |
| 2064 | var = *var_handle; |
| 2065 | *type_changed = true; |
| 2066 | } |
| 2067 | } |
| 2068 | else |
| 2069 | { |
| 2070 | *type_changed = 0; |
| 2071 | } |
| 2072 | |
| 2073 | { |
| 2074 | struct value *value; |
| 2075 | |
| 2076 | value = value_of_root_1 (var_handle); |
| 2077 | if (var->value == NULL || value == NULL) |
| 2078 | { |
| 2079 | /* For root varobj-s, a NULL value indicates a scoping issue. |
| 2080 | So, nothing to do in terms of checking for mutations. */ |
| 2081 | } |
| 2082 | else if (varobj_value_has_mutated (var, value, value_type (value))) |
| 2083 | { |
| 2084 | /* The type has mutated, so the children are no longer valid. |
| 2085 | Just delete them, and tell our caller that the type has |
| 2086 | changed. */ |
| 2087 | varobj_delete (var, 1 /* only_children */); |
| 2088 | var->num_children = -1; |
| 2089 | var->to = -1; |
| 2090 | var->from = -1; |
| 2091 | *type_changed = true; |
| 2092 | } |
| 2093 | return value; |
| 2094 | } |
| 2095 | } |
| 2096 | |
| 2097 | /* What is the ``struct value *'' for the INDEX'th child of PARENT? */ |
| 2098 | static struct value * |
| 2099 | value_of_child (const struct varobj *parent, int index) |
| 2100 | { |
| 2101 | struct value *value; |
| 2102 | |
| 2103 | value = (*parent->root->lang_ops->value_of_child) (parent, index); |
| 2104 | |
| 2105 | return value; |
| 2106 | } |
| 2107 | |
| 2108 | /* GDB already has a command called "value_of_variable". Sigh. */ |
| 2109 | static std::string |
| 2110 | my_value_of_variable (struct varobj *var, enum varobj_display_formats format) |
| 2111 | { |
| 2112 | if (var->root->is_valid) |
| 2113 | { |
| 2114 | if (var->dynamic->pretty_printer != NULL) |
| 2115 | return varobj_value_get_print_value (var->value.get (), var->format, |
| 2116 | var); |
| 2117 | return (*var->root->lang_ops->value_of_variable) (var, format); |
| 2118 | } |
| 2119 | else |
| 2120 | return std::string (); |
| 2121 | } |
| 2122 | |
| 2123 | void |
| 2124 | varobj_formatted_print_options (struct value_print_options *opts, |
| 2125 | enum varobj_display_formats format) |
| 2126 | { |
| 2127 | get_formatted_print_options (opts, format_code[(int) format]); |
| 2128 | opts->deref_ref = 0; |
| 2129 | opts->raw = !pretty_printing; |
| 2130 | } |
| 2131 | |
| 2132 | std::string |
| 2133 | varobj_value_get_print_value (struct value *value, |
| 2134 | enum varobj_display_formats format, |
| 2135 | const struct varobj *var) |
| 2136 | { |
| 2137 | struct value_print_options opts; |
| 2138 | struct type *type = NULL; |
| 2139 | long len = 0; |
| 2140 | gdb::unique_xmalloc_ptr<char> encoding; |
| 2141 | /* Initialize it just to avoid a GCC false warning. */ |
| 2142 | CORE_ADDR str_addr = 0; |
| 2143 | bool string_print = false; |
| 2144 | |
| 2145 | if (value == NULL) |
| 2146 | return std::string (); |
| 2147 | |
| 2148 | string_file stb; |
| 2149 | std::string thevalue; |
| 2150 | |
| 2151 | #if HAVE_PYTHON |
| 2152 | if (gdb_python_initialized) |
| 2153 | { |
| 2154 | PyObject *value_formatter = var->dynamic->pretty_printer; |
| 2155 | |
| 2156 | gdbpy_enter_varobj enter_py (var); |
| 2157 | |
| 2158 | if (value_formatter) |
| 2159 | { |
| 2160 | /* First check to see if we have any children at all. If so, |
| 2161 | we simply return {...}. */ |
| 2162 | if (dynamic_varobj_has_child_method (var)) |
| 2163 | return "{...}"; |
| 2164 | |
| 2165 | if (PyObject_HasAttr (value_formatter, gdbpy_to_string_cst)) |
| 2166 | { |
| 2167 | struct value *replacement; |
| 2168 | |
| 2169 | gdbpy_ref<> output = apply_varobj_pretty_printer (value_formatter, |
| 2170 | &replacement, |
| 2171 | &stb); |
| 2172 | |
| 2173 | /* If we have string like output ... */ |
| 2174 | if (output != NULL) |
| 2175 | { |
| 2176 | /* If this is a lazy string, extract it. For lazy |
| 2177 | strings we always print as a string, so set |
| 2178 | string_print. */ |
| 2179 | if (gdbpy_is_lazy_string (output.get ())) |
| 2180 | { |
| 2181 | gdbpy_extract_lazy_string (output.get (), &str_addr, |
| 2182 | &type, &len, &encoding); |
| 2183 | string_print = true; |
| 2184 | } |
| 2185 | else |
| 2186 | { |
| 2187 | /* If it is a regular (non-lazy) string, extract |
| 2188 | it and copy the contents into THEVALUE. If the |
| 2189 | hint says to print it as a string, set |
| 2190 | string_print. Otherwise just return the extracted |
| 2191 | string as a value. */ |
| 2192 | |
| 2193 | gdb::unique_xmalloc_ptr<char> s |
| 2194 | = python_string_to_target_string (output.get ()); |
| 2195 | |
| 2196 | if (s) |
| 2197 | { |
| 2198 | struct gdbarch *gdbarch; |
| 2199 | |
| 2200 | gdb::unique_xmalloc_ptr<char> hint |
| 2201 | = gdbpy_get_display_hint (value_formatter); |
| 2202 | if (hint) |
| 2203 | { |
| 2204 | if (!strcmp (hint.get (), "string")) |
| 2205 | string_print = true; |
| 2206 | } |
| 2207 | |
| 2208 | thevalue = std::string (s.get ()); |
| 2209 | len = thevalue.size (); |
| 2210 | gdbarch = value_type (value)->arch (); |
| 2211 | type = builtin_type (gdbarch)->builtin_char; |
| 2212 | |
| 2213 | if (!string_print) |
| 2214 | return thevalue; |
| 2215 | } |
| 2216 | else |
| 2217 | gdbpy_print_stack (); |
| 2218 | } |
| 2219 | } |
| 2220 | /* If the printer returned a replacement value, set VALUE |
| 2221 | to REPLACEMENT. If there is not a replacement value, |
| 2222 | just use the value passed to this function. */ |
| 2223 | if (replacement) |
| 2224 | value = replacement; |
| 2225 | } |
| 2226 | } |
| 2227 | } |
| 2228 | #endif |
| 2229 | |
| 2230 | varobj_formatted_print_options (&opts, format); |
| 2231 | |
| 2232 | /* If the THEVALUE has contents, it is a regular string. */ |
| 2233 | if (!thevalue.empty ()) |
| 2234 | LA_PRINT_STRING (&stb, type, (gdb_byte *) thevalue.c_str (), |
| 2235 | len, encoding.get (), 0, &opts); |
| 2236 | else if (string_print) |
| 2237 | /* Otherwise, if string_print is set, and it is not a regular |
| 2238 | string, it is a lazy string. */ |
| 2239 | val_print_string (type, encoding.get (), str_addr, len, &stb, &opts); |
| 2240 | else |
| 2241 | /* All other cases. */ |
| 2242 | common_val_print (value, &stb, 0, &opts, current_language); |
| 2243 | |
| 2244 | return std::move (stb.string ()); |
| 2245 | } |
| 2246 | |
| 2247 | bool |
| 2248 | varobj_editable_p (const struct varobj *var) |
| 2249 | { |
| 2250 | struct type *type; |
| 2251 | |
| 2252 | if (!(var->root->is_valid && var->value != nullptr |
| 2253 | && VALUE_LVAL (var->value.get ()))) |
| 2254 | return false; |
| 2255 | |
| 2256 | type = varobj_get_value_type (var); |
| 2257 | |
| 2258 | switch (type->code ()) |
| 2259 | { |
| 2260 | case TYPE_CODE_STRUCT: |
| 2261 | case TYPE_CODE_UNION: |
| 2262 | case TYPE_CODE_ARRAY: |
| 2263 | case TYPE_CODE_FUNC: |
| 2264 | case TYPE_CODE_METHOD: |
| 2265 | return false; |
| 2266 | break; |
| 2267 | |
| 2268 | default: |
| 2269 | return true; |
| 2270 | break; |
| 2271 | } |
| 2272 | } |
| 2273 | |
| 2274 | /* Call VAR's value_is_changeable_p language-specific callback. */ |
| 2275 | |
| 2276 | bool |
| 2277 | varobj_value_is_changeable_p (const struct varobj *var) |
| 2278 | { |
| 2279 | return var->root->lang_ops->value_is_changeable_p (var); |
| 2280 | } |
| 2281 | |
| 2282 | /* Return true if that varobj is floating, that is is always evaluated in the |
| 2283 | selected frame, and not bound to thread/frame. Such variable objects |
| 2284 | are created using '@' as frame specifier to -var-create. */ |
| 2285 | bool |
| 2286 | varobj_floating_p (const struct varobj *var) |
| 2287 | { |
| 2288 | return var->root->floating; |
| 2289 | } |
| 2290 | |
| 2291 | /* Implement the "value_is_changeable_p" varobj callback for most |
| 2292 | languages. */ |
| 2293 | |
| 2294 | bool |
| 2295 | varobj_default_value_is_changeable_p (const struct varobj *var) |
| 2296 | { |
| 2297 | bool r; |
| 2298 | struct type *type; |
| 2299 | |
| 2300 | if (CPLUS_FAKE_CHILD (var)) |
| 2301 | return false; |
| 2302 | |
| 2303 | type = varobj_get_value_type (var); |
| 2304 | |
| 2305 | switch (type->code ()) |
| 2306 | { |
| 2307 | case TYPE_CODE_STRUCT: |
| 2308 | case TYPE_CODE_UNION: |
| 2309 | case TYPE_CODE_ARRAY: |
| 2310 | r = false; |
| 2311 | break; |
| 2312 | |
| 2313 | default: |
| 2314 | r = true; |
| 2315 | } |
| 2316 | |
| 2317 | return r; |
| 2318 | } |
| 2319 | |
| 2320 | /* Iterate all the existing _root_ VAROBJs and call the FUNC callback |
| 2321 | for each one. */ |
| 2322 | |
| 2323 | void |
| 2324 | all_root_varobjs (gdb::function_view<void (struct varobj *var)> func) |
| 2325 | { |
| 2326 | /* Iterate "safely" - handle if the callee deletes its passed VAROBJ. */ |
| 2327 | auto iter = rootlist.begin (); |
| 2328 | auto end = rootlist.end (); |
| 2329 | while (iter != end) |
| 2330 | { |
| 2331 | auto self = iter++; |
| 2332 | func ((*self)->rootvar); |
| 2333 | } |
| 2334 | } |
| 2335 | |
| 2336 | /* Invalidate varobj VAR if it is tied to locals and re-create it if it is |
| 2337 | defined on globals. It is a helper for varobj_invalidate. |
| 2338 | |
| 2339 | This function is called after changing the symbol file, in this case the |
| 2340 | pointers to "struct type" stored by the varobj are no longer valid. All |
| 2341 | varobj must be either re-evaluated, or marked as invalid here. */ |
| 2342 | |
| 2343 | static void |
| 2344 | varobj_invalidate_iter (struct varobj *var) |
| 2345 | { |
| 2346 | /* global and floating var must be re-evaluated. */ |
| 2347 | if (var->root->floating || var->root->valid_block == NULL) |
| 2348 | { |
| 2349 | struct varobj *tmp_var; |
| 2350 | |
| 2351 | /* Try to create a varobj with same expression. If we succeed |
| 2352 | replace the old varobj, otherwise invalidate it. */ |
| 2353 | tmp_var = varobj_create (NULL, var->name.c_str (), (CORE_ADDR) 0, |
| 2354 | USE_CURRENT_FRAME); |
| 2355 | if (tmp_var != NULL) |
| 2356 | { |
| 2357 | tmp_var->obj_name = var->obj_name; |
| 2358 | varobj_delete (var, 0); |
| 2359 | install_variable (tmp_var); |
| 2360 | } |
| 2361 | else |
| 2362 | var->root->is_valid = false; |
| 2363 | } |
| 2364 | else /* locals must be invalidated. */ |
| 2365 | var->root->is_valid = false; |
| 2366 | } |
| 2367 | |
| 2368 | /* Invalidate the varobjs that are tied to locals and re-create the ones that |
| 2369 | are defined on globals. |
| 2370 | Invalidated varobjs will be always printed in_scope="invalid". */ |
| 2371 | |
| 2372 | void |
| 2373 | varobj_invalidate (void) |
| 2374 | { |
| 2375 | all_root_varobjs (varobj_invalidate_iter); |
| 2376 | } |
| 2377 | |
| 2378 | /* A hash function for a varobj. */ |
| 2379 | |
| 2380 | static hashval_t |
| 2381 | hash_varobj (const void *a) |
| 2382 | { |
| 2383 | const varobj *obj = (const varobj *) a; |
| 2384 | return htab_hash_string (obj->obj_name.c_str ()); |
| 2385 | } |
| 2386 | |
| 2387 | /* A hash table equality function for varobjs. */ |
| 2388 | |
| 2389 | static int |
| 2390 | eq_varobj_and_string (const void *a, const void *b) |
| 2391 | { |
| 2392 | const varobj *obj = (const varobj *) a; |
| 2393 | const char *name = (const char *) b; |
| 2394 | |
| 2395 | return obj->obj_name == name; |
| 2396 | } |
| 2397 | |
| 2398 | void _initialize_varobj (); |
| 2399 | void |
| 2400 | _initialize_varobj () |
| 2401 | { |
| 2402 | varobj_table = htab_create_alloc (5, hash_varobj, eq_varobj_and_string, |
| 2403 | nullptr, xcalloc, xfree); |
| 2404 | |
| 2405 | add_setshow_zuinteger_cmd ("varobj", class_maintenance, |
| 2406 | &varobjdebug, |
| 2407 | _("Set varobj debugging."), |
| 2408 | _("Show varobj debugging."), |
| 2409 | _("When non-zero, varobj debugging is enabled."), |
| 2410 | NULL, show_varobjdebug, |
| 2411 | &setdebuglist, &showdebuglist); |
| 2412 | } |