gdb/mi/mi-cmd-var.c

   1 /* MI Command Set - varobj commands.
   2    Copyright (C) 2000-2017 Free Software Foundation, Inc.
   3
   4    Contributed by Cygnus Solutions (a Red Hat company).
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "defs.h"
  22 #include "mi-cmds.h"
  23 #include "mi-main.h"
  24 #include "ui-out.h"
  25 #include "mi-out.h"
  26 #include "varobj.h"
  27 #include "language.h"
  28 #include "value.h"
  29 #include <ctype.h>
  30 #include "mi-getopt.h"
  31 #include "gdbthread.h"
  32 #include "mi-parse.h"
  33 #include "common/gdb_optional.h"
  34
  35 extern unsigned int varobjdebug;                /* defined in varobj.c.  */
  36
  37 static void varobj_update_one (struct varobj *var,
  38                                enum print_values print_values,
  39                                int is_explicit);
  40
  41 static int mi_print_value_p (struct varobj *var,
  42                              enum print_values print_values);
  43
  44 /* Print variable object VAR.  The PRINT_VALUES parameter controls
  45    if the value should be printed.  The PRINT_EXPRESSION parameter
  46    controls if the expression should be printed.  */
  47
  48 static void
  49 print_varobj (struct varobj *var, enum print_values print_values,
  50               int print_expression)
  51 {
  52   struct ui_out *uiout = current_uiout;
  53   int thread_id;
  54
  55   uiout->field_string ("name", varobj_get_objname (var));
  56   if (print_expression)
  57     {
  58       std::string exp = varobj_get_expression (var);
  59
  60       uiout->field_string ("exp", exp.c_str ());
  61     }
  62   uiout->field_int ("numchild", varobj_get_num_children (var));
  63
  64   if (mi_print_value_p (var, print_values))
  65     {
  66       std::string val = varobj_get_value (var);
  67
  68       uiout->field_string ("value", val.c_str ());
  69     }
  70
  71   std::string type = varobj_get_type (var);
  72   if (!type.empty ())
  73     uiout->field_string ("type", type.c_str ());
  74
  75   thread_id = varobj_get_thread_id (var);
  76   if (thread_id > 0)
  77     uiout->field_int ("thread-id", thread_id);
  78
  79   if (varobj_get_frozen (var))
  80     uiout->field_int ("frozen", 1);
  81
  82   gdb::unique_xmalloc_ptr<char> display_hint = varobj_get_display_hint (var);
  83   if (display_hint)
  84     uiout->field_string ("displayhint", display_hint.get ());
  85
  86   if (varobj_is_dynamic_p (var))
  87     uiout->field_int ("dynamic", 1);
  88 }
  89
  90 /* VAROBJ operations */
  91
  92 void
  93 mi_cmd_var_create (const char *command, char **argv, int argc)
  94 {
  95   struct ui_out *uiout = current_uiout;
  96   CORE_ADDR frameaddr = 0;
  97   struct varobj *var;
  98   char *name;
  99   char *frame;
 100   char *expr;
 101   struct cleanup *old_cleanups;
 102   enum varobj_type var_type;
 103
 104   if (argc != 3)
 105     error (_("-var-create: Usage: NAME FRAME EXPRESSION."));
 106
 107   name = xstrdup (argv[0]);
 108   /* Add cleanup for name. Must be free_current_contents as name can
 109      be reallocated.  */
 110   old_cleanups = make_cleanup (free_current_contents, &name);
 111
 112   frame = xstrdup (argv[1]);
 113   make_cleanup (xfree, frame);
 114
 115   expr = xstrdup (argv[2]);
 116   make_cleanup (xfree, expr);
 117
 118   if (strcmp (name, "-") == 0)
 119     {
 120       xfree (name);
 121       name = varobj_gen_name ();
 122     }
 123   else if (!isalpha (*name))
 124     error (_("-var-create: name of object must begin with a letter"));
 125
 126   if (strcmp (frame, "*") == 0)
 127     var_type = USE_CURRENT_FRAME;
 128   else if (strcmp (frame, "@") == 0)
 129     var_type = USE_SELECTED_FRAME;
 130   else
 131     {
 132       var_type = USE_SPECIFIED_FRAME;
 133       frameaddr = string_to_core_addr (frame);
 134     }
 135
 136   if (varobjdebug)
 137     fprintf_unfiltered (gdb_stdlog,
 138                     "Name=\"%s\", Frame=\"%s\" (%s), Expression=\"%s\"\n",
 139                         name, frame, hex_string (frameaddr), expr);
 140
 141   var = varobj_create (name, expr, frameaddr, var_type);
 142
 143   if (var == NULL)
 144     error (_("-var-create: unable to create variable object"));
 145
 146   print_varobj (var, PRINT_ALL_VALUES, 0 /* don't print expression */);
 147
 148   uiout->field_int ("has_more", varobj_has_more (var, 0));
 149
 150   do_cleanups (old_cleanups);
 151 }
 152
 153 void
 154 mi_cmd_var_delete (const char *command, char **argv, int argc)
 155 {
 156   char *name;
 157   struct varobj *var;
 158   int numdel;
 159   int children_only_p = 0;
 160   struct cleanup *old_cleanups;
 161   struct ui_out *uiout = current_uiout;
 162
 163   if (argc < 1 || argc > 2)
 164     error (_("-var-delete: Usage: [-c] EXPRESSION."));
 165
 166   name = xstrdup (argv[0]);
 167   /* Add cleanup for name. Must be free_current_contents as name can
 168      be reallocated.  */
 169   old_cleanups = make_cleanup (free_current_contents, &name);
 170
 171   /* If we have one single argument it cannot be '-c' or any string
 172      starting with '-'.  */
 173   if (argc == 1)
 174     {
 175       if (strcmp (name, "-c") == 0)
 176         error (_("-var-delete: Missing required "
 177                  "argument after '-c': variable object name"));
 178       if (*name == '-')
 179         error (_("-var-delete: Illegal variable object name"));
 180     }
 181
 182   /* If we have 2 arguments they must be '-c' followed by a string
 183      which would be the variable name.  */
 184   if (argc == 2)
 185     {
 186       if (strcmp (name, "-c") != 0)
 187         error (_("-var-delete: Invalid option."));
 188       children_only_p = 1;
 189       do_cleanups (old_cleanups);
 190       name = xstrdup (argv[1]);
 191       old_cleanups = make_cleanup (free_current_contents, &name);
 192     }
 193
 194   /* If we didn't error out, now NAME contains the name of the
 195      variable.  */
 196
 197   var = varobj_get_handle (name);
 198
 199   numdel = varobj_delete (var, children_only_p);
 200
 201   uiout->field_int ("ndeleted", numdel);
 202
 203   do_cleanups (old_cleanups);
 204 }
 205
 206 /* Parse a string argument into a format value.  */
 207
 208 static enum varobj_display_formats
 209 mi_parse_format (const char *arg)
 210 {
 211   if (arg != NULL)
 212     {
 213       int len;
 214
 215       len = strlen (arg);
 216
 217       if (strncmp (arg, "natural", len) == 0)
 218         return FORMAT_NATURAL;
 219       else if (strncmp (arg, "binary", len) == 0)
 220         return FORMAT_BINARY;
 221       else if (strncmp (arg, "decimal", len) == 0)
 222         return FORMAT_DECIMAL;
 223       else if (strncmp (arg, "hexadecimal", len) == 0)
 224         return FORMAT_HEXADECIMAL;
 225       else if (strncmp (arg, "octal", len) == 0)
 226         return FORMAT_OCTAL;
 227       else if (strncmp (arg, "zero-hexadecimal", len) == 0)
 228         return FORMAT_ZHEXADECIMAL;
 229     }
 230
 231   error (_("Must specify the format as: \"natural\", "
 232            "\"binary\", \"decimal\", \"hexadecimal\", \"octal\" or \"zero-hexadecimal\""));
 233 }
 234
 235 void
 236 mi_cmd_var_set_format (const char *command, char **argv, int argc)
 237 {
 238   enum varobj_display_formats format;
 239   struct varobj *var;
 240   struct ui_out *uiout = current_uiout;
 241
 242   if (argc != 2)
 243     error (_("-var-set-format: Usage: NAME FORMAT."));
 244
 245   /* Get varobj handle, if a valid var obj name was specified.  */
 246   var = varobj_get_handle (argv[0]);
 247
 248   format = mi_parse_format (argv[1]);
 249
 250   /* Set the format of VAR to the given format.  */
 251   varobj_set_display_format (var, format);
 252
 253   /* Report the new current format.  */
 254   uiout->field_string ("format", varobj_format_string[(int) format]);
 255
 256   /* Report the value in the new format.  */
 257   std::string val = varobj_get_value (var);
 258   uiout->field_string ("value", val.c_str ());
 259 }
 260
 261 void
 262 mi_cmd_var_set_visualizer (const char *command, char **argv, int argc)
 263 {
 264   struct varobj *var;
 265
 266   if (argc != 2)
 267     error (_("Usage: NAME VISUALIZER_FUNCTION."));
 268
 269   var = varobj_get_handle (argv[0]);
 270
 271   if (var == NULL)
 272     error (_("Variable object not found"));
 273
 274   varobj_set_visualizer (var, argv[1]);
 275 }
 276
 277 void
 278 mi_cmd_var_set_frozen (const char *command, char **argv, int argc)
 279 {
 280   struct varobj *var;
 281   int frozen;
 282
 283   if (argc != 2)
 284     error (_("-var-set-format: Usage: NAME FROZEN_FLAG."));
 285
 286   var = varobj_get_handle (argv[0]);
 287
 288   if (strcmp (argv[1], "0") == 0)
 289     frozen = 0;
 290   else if (strcmp (argv[1], "1") == 0)
 291     frozen = 1;
 292   else
 293     error (_("Invalid flag value"));
 294
 295   varobj_set_frozen (var, frozen);
 296
 297   /* We don't automatically return the new value, or what varobjs got
 298      new values during unfreezing.  If this information is required,
 299      client should call -var-update explicitly.  */
 300 }
 301
 302 void
 303 mi_cmd_var_show_format (const char *command, char **argv, int argc)
 304 {
 305   struct ui_out *uiout = current_uiout;
 306   enum varobj_display_formats format;
 307   struct varobj *var;
 308
 309   if (argc != 1)
 310     error (_("-var-show-format: Usage: NAME."));
 311
 312   /* Get varobj handle, if a valid var obj name was specified.  */
 313   var = varobj_get_handle (argv[0]);
 314
 315   format = varobj_get_display_format (var);
 316
 317   /* Report the current format.  */
 318   uiout->field_string ("format", varobj_format_string[(int) format]);
 319 }
 320
 321 void
 322 mi_cmd_var_info_num_children (const char *command, char **argv, int argc)
 323 {
 324   struct ui_out *uiout = current_uiout;
 325   struct varobj *var;
 326
 327   if (argc != 1)
 328     error (_("-var-info-num-children: Usage: NAME."));
 329
 330   /* Get varobj handle, if a valid var obj name was specified.  */
 331   var = varobj_get_handle (argv[0]);
 332
 333   uiout->field_int ("numchild", varobj_get_num_children (var));
 334 }
 335
 336 /* Return 1 if given the argument PRINT_VALUES we should display
 337    the varobj VAR.  */
 338
 339 static int
 340 mi_print_value_p (struct varobj *var, enum print_values print_values)
 341 {
 342   struct type *type;
 343
 344   if (print_values == PRINT_NO_VALUES)
 345     return 0;
 346
 347   if (print_values == PRINT_ALL_VALUES)
 348     return 1;
 349
 350   if (varobj_is_dynamic_p (var))
 351     return 1;
 352
 353   type = varobj_get_gdb_type (var);
 354   if (type == NULL)
 355     return 1;
 356   else
 357     {
 358       type = check_typedef (type);
 359
 360       /* For PRINT_SIMPLE_VALUES, only print the value if it has a type
 361          and that type is not a compound type.  */
 362       return (TYPE_CODE (type) != TYPE_CODE_ARRAY
 363               && TYPE_CODE (type) != TYPE_CODE_STRUCT
 364               && TYPE_CODE (type) != TYPE_CODE_UNION);
 365     }
 366 }
 367
 368 void
 369 mi_cmd_var_list_children (const char *command, char **argv, int argc)
 370 {
 371   struct ui_out *uiout = current_uiout;
 372   struct varobj *var;
 373   VEC(varobj_p) *children;
 374   struct varobj *child;
 375   enum print_values print_values;
 376   int ix;
 377   int from, to;
 378
 379   if (argc < 1 || argc > 4)
 380     error (_("-var-list-children: Usage: "
 381              "[PRINT_VALUES] NAME [FROM TO]"));
 382
 383   /* Get varobj handle, if a valid var obj name was specified.  */
 384   if (argc == 1 || argc == 3)
 385     var = varobj_get_handle (argv[0]);
 386   else
 387     var = varobj_get_handle (argv[1]);
 388
 389   if (argc > 2)
 390     {
 391       from = atoi (argv[argc - 2]);
 392       to = atoi (argv[argc - 1]);
 393     }
 394   else
 395     {
 396       from = -1;
 397       to = -1;
 398     }
 399
 400   children = varobj_list_children (var, &from, &to);
 401   uiout->field_int ("numchild", to - from);
 402   if (argc == 2 || argc == 4)
 403     print_values = mi_parse_print_values (argv[0]);
 404   else
 405     print_values = PRINT_NO_VALUES;
 406
 407   gdb::unique_xmalloc_ptr<char> display_hint = varobj_get_display_hint (var);
 408   if (display_hint)
 409     uiout->field_string ("displayhint", display_hint.get ());
 410
 411   if (from < to)
 412     {
 413       struct cleanup *cleanup_children;
 414
 415       if (mi_version (uiout) == 1)
 416         cleanup_children
 417           = make_cleanup_ui_out_tuple_begin_end (uiout, "children");
 418       else
 419         cleanup_children
 420           = make_cleanup_ui_out_list_begin_end (uiout, "children");
 421       for (ix = from;
 422            ix < to && VEC_iterate (varobj_p, children, ix, child);
 423            ++ix)
 424         {
 425           ui_out_emit_tuple child_emitter (uiout, "child");
 426
 427           print_varobj (child, print_values, 1 /* print expression */);
 428         }
 429       do_cleanups (cleanup_children);
 430     }
 431
 432   uiout->field_int ("has_more", varobj_has_more (var, to));
 433 }
 434
 435 void
 436 mi_cmd_var_info_type (const char *command, char **argv, int argc)
 437 {
 438   struct ui_out *uiout = current_uiout;
 439   struct varobj *var;
 440
 441   if (argc != 1)
 442     error (_("-var-info-type: Usage: NAME."));
 443
 444   /* Get varobj handle, if a valid var obj name was specified.  */
 445   var = varobj_get_handle (argv[0]);
 446
 447   std::string type_name = varobj_get_type (var);
 448   uiout->field_string ("type", type_name.c_str ());
 449 }
 450
 451 void
 452 mi_cmd_var_info_path_expression (const char *command, char **argv, int argc)
 453 {
 454   struct ui_out *uiout = current_uiout;
 455   struct varobj *var;
 456
 457   if (argc != 1)
 458     error (_("Usage: NAME."));
 459
 460   /* Get varobj handle, if a valid var obj name was specified.  */
 461   var = varobj_get_handle (argv[0]);
 462
 463   const char *path_expr = varobj_get_path_expr (var);
 464
 465   uiout->field_string ("path_expr", path_expr);
 466 }
 467
 468 void
 469 mi_cmd_var_info_expression (const char *command, char **argv, int argc)
 470 {
 471   struct ui_out *uiout = current_uiout;
 472   const struct language_defn *lang;
 473   struct varobj *var;
 474
 475   if (argc != 1)
 476     error (_("-var-info-expression: Usage: NAME."));
 477
 478   /* Get varobj handle, if a valid var obj name was specified.  */
 479   var = varobj_get_handle (argv[0]);
 480
 481   lang = varobj_get_language (var);
 482
 483   uiout->field_string ("lang", lang->la_natural_name);
 484
 485   std::string exp = varobj_get_expression (var);
 486   uiout->field_string ("exp", exp.c_str ());
 487 }
 488
 489 void
 490 mi_cmd_var_show_attributes (const char *command, char **argv, int argc)
 491 {
 492   struct ui_out *uiout = current_uiout;
 493   int attr;
 494   const char *attstr;
 495   struct varobj *var;
 496
 497   if (argc != 1)
 498     error (_("-var-show-attributes: Usage: NAME."));
 499
 500   /* Get varobj handle, if a valid var obj name was specified */
 501   var = varobj_get_handle (argv[0]);
 502
 503   attr = varobj_get_attributes (var);
 504   /* FIXME: define masks for attributes */
 505   if (attr & 0x00000001)
 506     attstr = "editable";
 507   else
 508     attstr = "noneditable";
 509
 510   uiout->field_string ("attr", attstr);
 511 }
 512
 513 void
 514 mi_cmd_var_evaluate_expression (const char *command, char **argv, int argc)
 515 {
 516   struct ui_out *uiout = current_uiout;
 517   struct varobj *var;
 518
 519   enum varobj_display_formats format;
 520   int formatFound;
 521   int oind;
 522   char *oarg;
 523
 524   enum opt
 525   {
 526     OP_FORMAT
 527   };
 528   static const struct mi_opt opts[] =
 529     {
 530       {"f", OP_FORMAT, 1},
 531       { 0, 0, 0 }
 532     };
 533
 534   /* Parse arguments.  */
 535   format = FORMAT_NATURAL;
 536   formatFound = 0;
 537   oind = 0;
 538   while (1)
 539     {
 540       int opt = mi_getopt ("-var-evaluate-expression", argc, argv,
 541                            opts, &oind, &oarg);
 542
 543       if (opt < 0)
 544         break;
 545       switch ((enum opt) opt)
 546         {
 547         case OP_FORMAT:
 548           if (formatFound)
 549             error (_("Cannot specify format more than once"));
 550
 551           format = mi_parse_format (oarg);
 552           formatFound = 1;
 553           break;
 554         }
 555     }
 556
 557   if (oind >= argc)
 558     error (_("Usage: [-f FORMAT] NAME"));
 559
 560   if (oind < argc - 1)
 561     error (_("Garbage at end of command"));
 562
 563   /* Get varobj handle, if a valid var obj name was specified.  */
 564   var = varobj_get_handle (argv[oind]);
 565
 566   if (formatFound)
 567     {
 568       std::string val = varobj_get_formatted_value (var, format);
 569
 570       uiout->field_string ("value", val.c_str ());
 571     }
 572   else
 573     {
 574       std::string val = varobj_get_value (var);
 575
 576       uiout->field_string ("value", val.c_str ());
 577     }
 578 }
 579
 580 void
 581 mi_cmd_var_assign (const char *command, char **argv, int argc)
 582 {
 583   struct ui_out *uiout = current_uiout;
 584   struct varobj *var;
 585
 586   if (argc != 2)
 587     error (_("-var-assign: Usage: NAME EXPRESSION."));
 588
 589   /* Get varobj handle, if a valid var obj name was specified.  */
 590   var = varobj_get_handle (argv[0]);
 591
 592   if (!varobj_editable_p (var))
 593     error (_("-var-assign: Variable object is not editable"));
 594
 595   const char *expression = argv[1];
 596
 597   /* MI command '-var-assign' may write memory, so suppress memory
 598      changed notification if it does.  */
 599   scoped_restore save_suppress
 600     = make_scoped_restore (&mi_suppress_notification.memory, 1);
 601
 602   if (!varobj_set_value (var, expression))
 603     error (_("-var-assign: Could not assign "
 604              "expression to variable object"));
 605
 606   std::string val = varobj_get_value (var);
 607   uiout->field_string ("value", val.c_str ());
 608 }
 609
 610 /* Type used for parameters passing to mi_cmd_var_update_iter.  */
 611
 612 struct mi_cmd_var_update
 613   {
 614     int only_floating;
 615     enum print_values print_values;
 616   };
 617
 618 /* Helper for mi_cmd_var_update - update each VAR.  */
 619
 620 static void
 621 mi_cmd_var_update_iter (struct varobj *var, void *data_pointer)
 622 {
 623   struct mi_cmd_var_update *data = (struct mi_cmd_var_update *) data_pointer;
 624   int thread_id, thread_stopped;
 625
 626   thread_id = varobj_get_thread_id (var);
 627
 628   if (thread_id == -1
 629       && (ptid_equal (inferior_ptid, null_ptid)
 630           || is_stopped (inferior_ptid)))
 631     thread_stopped = 1;
 632   else
 633     {
 634       struct thread_info *tp = find_thread_global_id (thread_id);
 635
 636       if (tp)
 637         thread_stopped = is_stopped (tp->ptid);
 638       else
 639         thread_stopped = 1;
 640     }
 641
 642   if (thread_stopped
 643       && (!data->only_floating || varobj_floating_p (var)))
 644     varobj_update_one (var, data->print_values, 0 /* implicit */);
 645 }
 646
 647 void
 648 mi_cmd_var_update (const char *command, char **argv, int argc)
 649 {
 650   struct ui_out *uiout = current_uiout;
 651   struct cleanup *cleanup;
 652   char *name;
 653   enum print_values print_values;
 654
 655   if (argc != 1 && argc != 2)
 656     error (_("-var-update: Usage: [PRINT_VALUES] NAME."));
 657
 658   if (argc == 1)
 659     name = argv[0];
 660   else
 661     name = argv[1];
 662
 663   if (argc == 2)
 664     print_values = mi_parse_print_values (argv[0]);
 665   else
 666     print_values = PRINT_NO_VALUES;
 667
 668   if (mi_version (uiout) <= 1)
 669     cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, "changelist");
 670   else
 671     cleanup = make_cleanup_ui_out_list_begin_end (uiout, "changelist");
 672
 673   /* Check if the parameter is a "*", which means that we want to
 674      update all variables.  */
 675
 676   if ((*name == '*' || *name == '@') && (*(name + 1) == '\0'))
 677     {
 678       struct mi_cmd_var_update data;
 679
 680       data.only_floating = (*name == '@');
 681       data.print_values = print_values;
 682
 683       /* varobj_update_one automatically updates all the children of
 684          VAROBJ.  Therefore update each VAROBJ only once by iterating
 685          only the root VAROBJs.  */
 686
 687       all_root_varobjs (mi_cmd_var_update_iter, &data);
 688     }
 689   else
 690     {
 691       /* Get varobj handle, if a valid var obj name was specified.  */
 692       struct varobj *var = varobj_get_handle (name);
 693
 694       varobj_update_one (var, print_values, 1 /* explicit */);
 695     }
 696
 697   do_cleanups (cleanup);
 698 }
 699
 700 /* Helper for mi_cmd_var_update().  */
 701
 702 static void
 703 varobj_update_one (struct varobj *var, enum print_values print_values,
 704                    int is_explicit)
 705 {
 706   struct ui_out *uiout = current_uiout;
 707   VEC (varobj_update_result) *changes;
 708   varobj_update_result *r;
 709   int i;
 710
 711   changes = varobj_update (&var, is_explicit);
 712
 713   for (i = 0; VEC_iterate (varobj_update_result, changes, i, r); ++i)
 714     {
 715       int from, to;
 716
 717       gdb::optional<ui_out_emit_tuple> tuple_emitter;
 718       if (mi_version (uiout) > 1)
 719         tuple_emitter.emplace (uiout, nullptr);
 720       uiout->field_string ("name", varobj_get_objname (r->varobj));
 721
 722       switch (r->status)
 723         {
 724         case VAROBJ_IN_SCOPE:
 725           if (mi_print_value_p (r->varobj, print_values))
 726             {
 727               std::string val = varobj_get_value (r->varobj);
 728
 729               uiout->field_string ("value", val.c_str ());
 730             }
 731           uiout->field_string ("in_scope", "true");
 732           break;
 733         case VAROBJ_NOT_IN_SCOPE:
 734           uiout->field_string ("in_scope", "false");
 735           break;
 736         case VAROBJ_INVALID:
 737           uiout->field_string ("in_scope", "invalid");
 738           break;
 739         }
 740
 741       if (r->status != VAROBJ_INVALID)
 742         {
 743           if (r->type_changed)
 744             uiout->field_string ("type_changed", "true");
 745           else
 746             uiout->field_string ("type_changed", "false");
 747         }
 748
 749       if (r->type_changed)
 750         {
 751           std::string type_name = varobj_get_type (r->varobj);
 752
 753           uiout->field_string ("new_type", type_name.c_str ());
 754         }
 755
 756       if (r->type_changed || r->children_changed)
 757         uiout->field_int ("new_num_children",
 758                           varobj_get_num_children (r->varobj));
 759
 760       gdb::unique_xmalloc_ptr<char> display_hint
 761         = varobj_get_display_hint (r->varobj);
 762       if (display_hint)
 763         uiout->field_string ("displayhint", display_hint.get ());
 764
 765       if (varobj_is_dynamic_p (r->varobj))
 766         uiout->field_int ("dynamic", 1);
 767
 768       varobj_get_child_range (r->varobj, &from, &to);
 769       uiout->field_int ("has_more", varobj_has_more (r->varobj, to));
 770
 771       if (r->newobj)
 772         {
 773           int j;
 774           varobj_p child;
 775
 776           ui_out_emit_list list_emitter (uiout, "new_children");
 777           for (j = 0; VEC_iterate (varobj_p, r->newobj, j, child); ++j)
 778             {
 779               ui_out_emit_tuple tuple_emitter (uiout, NULL);
 780               print_varobj (child, print_values, 1 /* print_expression */);
 781             }
 782
 783           VEC_free (varobj_p, r->newobj);
 784           r->newobj = NULL;     /* Paranoia.  */
 785         }
 786     }
 787   VEC_free (varobj_update_result, changes);
 788 }
 789
 790 void
 791 mi_cmd_enable_pretty_printing (const char *command, char **argv, int argc)
 792 {
 793   if (argc != 0)
 794     error (_("-enable-pretty-printing: no arguments allowed"));
 795
 796   varobj_enable_pretty_printing ();
 797 }
 798
 799 void
 800 mi_cmd_var_set_update_range (const char *command, char **argv, int argc)
 801 {
 802   struct varobj *var;
 803   int from, to;
 804
 805   if (argc != 3)
 806     error (_("-var-set-update-range: Usage: VAROBJ FROM TO"));
 807
 808   var = varobj_get_handle (argv[0]);
 809   from = atoi (argv[1]);
 810   to = atoi (argv[2]);
 811
 812   varobj_set_child_range (var, from, to);
 813 }