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
  34 extern unsigned int varobjdebug;                /* defined in varobj.c.  */
  35
  36 static void varobj_update_one (struct varobj *var,
  37                                enum print_values print_values,
  38                                int is_explicit);
  39
  40 static int mi_print_value_p (struct varobj *var,
  41                              enum print_values print_values);
  42
  43 /* Print variable object VAR.  The PRINT_VALUES parameter controls
  44    if the value should be printed.  The PRINT_EXPRESSION parameter
  45    controls if the expression should be printed.  */
  46
  47 static void
  48 print_varobj (struct varobj *var, enum print_values print_values,
  49               int print_expression)
  50 {
  51   struct ui_out *uiout = current_uiout;
  52   int thread_id;
  53
  54   uiout->field_string ("name", varobj_get_objname (var));
  55   if (print_expression)
  56     {
  57       std::string exp = varobj_get_expression (var);
  58
  59       uiout->field_string ("exp", exp.c_str ());
  60     }
  61   uiout->field_int ("numchild", varobj_get_num_children (var));
  62
  63   if (mi_print_value_p (var, print_values))
  64     {
  65       std::string val = varobj_get_value (var);
  66
  67       uiout->field_string ("value", val.c_str ());
  68     }
  69
  70   std::string type = varobj_get_type (var);
  71   if (!type.empty ())
  72     uiout->field_string ("type", type.c_str ());
  73
  74   thread_id = varobj_get_thread_id (var);
  75   if (thread_id > 0)
  76     uiout->field_int ("thread-id", thread_id);
  77
  78   if (varobj_get_frozen (var))
  79     uiout->field_int ("frozen", 1);
  80
  81   gdb::unique_xmalloc_ptr<char> display_hint = varobj_get_display_hint (var);
  82   if (display_hint)
  83     uiout->field_string ("displayhint", display_hint.get ());
  84
  85   if (varobj_is_dynamic_p (var))
  86     uiout->field_int ("dynamic", 1);
  87 }
  88
  89 /* VAROBJ operations */
  90
  91 void
  92 mi_cmd_var_create (const char *command, char **argv, int argc)
  93 {
  94   struct ui_out *uiout = current_uiout;
  95   CORE_ADDR frameaddr = 0;
  96   struct varobj *var;
  97   char *name;
  98   char *frame;
  99   char *expr;
 100   struct cleanup *old_cleanups;
 101   enum varobj_type var_type;
 102
 103   if (argc != 3)
 104     error (_("-var-create: Usage: NAME FRAME EXPRESSION."));
 105
 106   name = xstrdup (argv[0]);
 107   /* Add cleanup for name. Must be free_current_contents as name can
 108      be reallocated.  */
 109   old_cleanups = make_cleanup (free_current_contents, &name);
 110
 111   frame = xstrdup (argv[1]);
 112   make_cleanup (xfree, frame);
 113
 114   expr = xstrdup (argv[2]);
 115   make_cleanup (xfree, expr);
 116
 117   if (strcmp (name, "-") == 0)
 118     {
 119       xfree (name);
 120       name = varobj_gen_name ();
 121     }
 122   else if (!isalpha (*name))
 123     error (_("-var-create: name of object must begin with a letter"));
 124
 125   if (strcmp (frame, "*") == 0)
 126     var_type = USE_CURRENT_FRAME;
 127   else if (strcmp (frame, "@") == 0)
 128     var_type = USE_SELECTED_FRAME;
 129   else
 130     {
 131       var_type = USE_SPECIFIED_FRAME;
 132       frameaddr = string_to_core_addr (frame);
 133     }
 134
 135   if (varobjdebug)
 136     fprintf_unfiltered (gdb_stdlog,
 137                     "Name=\"%s\", Frame=\"%s\" (%s), Expression=\"%s\"\n",
 138                         name, frame, hex_string (frameaddr), expr);
 139
 140   var = varobj_create (name, expr, frameaddr, var_type);
 141
 142   if (var == NULL)
 143     error (_("-var-create: unable to create variable object"));
 144
 145   print_varobj (var, PRINT_ALL_VALUES, 0 /* don't print expression */);
 146
 147   uiout->field_int ("has_more", varobj_has_more (var, 0));
 148
 149   do_cleanups (old_cleanups);
 150 }
 151
 152 void
 153 mi_cmd_var_delete (const char *command, char **argv, int argc)
 154 {
 155   char *name;
 156   struct varobj *var;
 157   int numdel;
 158   int children_only_p = 0;
 159   struct cleanup *old_cleanups;
 160   struct ui_out *uiout = current_uiout;
 161
 162   if (argc < 1 || argc > 2)
 163     error (_("-var-delete: Usage: [-c] EXPRESSION."));
 164
 165   name = xstrdup (argv[0]);
 166   /* Add cleanup for name. Must be free_current_contents as name can
 167      be reallocated.  */
 168   old_cleanups = make_cleanup (free_current_contents, &name);
 169
 170   /* If we have one single argument it cannot be '-c' or any string
 171      starting with '-'.  */
 172   if (argc == 1)
 173     {
 174       if (strcmp (name, "-c") == 0)
 175         error (_("-var-delete: Missing required "
 176                  "argument after '-c': variable object name"));
 177       if (*name == '-')
 178         error (_("-var-delete: Illegal variable object name"));
 179     }
 180
 181   /* If we have 2 arguments they must be '-c' followed by a string
 182      which would be the variable name.  */
 183   if (argc == 2)
 184     {
 185       if (strcmp (name, "-c") != 0)
 186         error (_("-var-delete: Invalid option."));
 187       children_only_p = 1;
 188       do_cleanups (old_cleanups);
 189       name = xstrdup (argv[1]);
 190       old_cleanups = make_cleanup (free_current_contents, &name);
 191     }
 192
 193   /* If we didn't error out, now NAME contains the name of the
 194      variable.  */
 195
 196   var = varobj_get_handle (name);
 197
 198   numdel = varobj_delete (var, children_only_p);
 199
 200   uiout->field_int ("ndeleted", numdel);
 201
 202   do_cleanups (old_cleanups);
 203 }
 204
 205 /* Parse a string argument into a format value.  */
 206
 207 static enum varobj_display_formats
 208 mi_parse_format (const char *arg)
 209 {
 210   if (arg != NULL)
 211     {
 212       int len;
 213
 214       len = strlen (arg);
 215
 216       if (strncmp (arg, "natural", len) == 0)
 217         return FORMAT_NATURAL;
 218       else if (strncmp (arg, "binary", len) == 0)
 219         return FORMAT_BINARY;
 220       else if (strncmp (arg, "decimal", len) == 0)
 221         return FORMAT_DECIMAL;
 222       else if (strncmp (arg, "hexadecimal", len) == 0)
 223         return FORMAT_HEXADECIMAL;
 224       else if (strncmp (arg, "octal", len) == 0)
 225         return FORMAT_OCTAL;
 226       else if (strncmp (arg, "zero-hexadecimal", len) == 0)
 227         return FORMAT_ZHEXADECIMAL;
 228     }
 229
 230   error (_("Must specify the format as: \"natural\", "
 231            "\"binary\", \"decimal\", \"hexadecimal\", \"octal\" or \"zero-hexadecimal\""));
 232 }
 233
 234 void
 235 mi_cmd_var_set_format (const char *command, char **argv, int argc)
 236 {
 237   enum varobj_display_formats format;
 238   struct varobj *var;
 239   struct ui_out *uiout = current_uiout;
 240
 241   if (argc != 2)
 242     error (_("-var-set-format: Usage: NAME FORMAT."));
 243
 244   /* Get varobj handle, if a valid var obj name was specified.  */
 245   var = varobj_get_handle (argv[0]);
 246
 247   format = mi_parse_format (argv[1]);
 248
 249   /* Set the format of VAR to the given format.  */
 250   varobj_set_display_format (var, format);
 251
 252   /* Report the new current format.  */
 253   uiout->field_string ("format", varobj_format_string[(int) format]);
 254
 255   /* Report the value in the new format.  */
 256   std::string val = varobj_get_value (var);
 257   uiout->field_string ("value", val.c_str ());
 258 }
 259
 260 void
 261 mi_cmd_var_set_visualizer (const char *command, char **argv, int argc)
 262 {
 263   struct varobj *var;
 264
 265   if (argc != 2)
 266     error (_("Usage: NAME VISUALIZER_FUNCTION."));
 267
 268   var = varobj_get_handle (argv[0]);
 269
 270   if (var == NULL)
 271     error (_("Variable object not found"));
 272
 273   varobj_set_visualizer (var, argv[1]);
 274 }
 275
 276 void
 277 mi_cmd_var_set_frozen (const char *command, char **argv, int argc)
 278 {
 279   struct varobj *var;
 280   int frozen;
 281
 282   if (argc != 2)
 283     error (_("-var-set-format: Usage: NAME FROZEN_FLAG."));
 284
 285   var = varobj_get_handle (argv[0]);
 286
 287   if (strcmp (argv[1], "0") == 0)
 288     frozen = 0;
 289   else if (strcmp (argv[1], "1") == 0)
 290     frozen = 1;
 291   else
 292     error (_("Invalid flag value"));
 293
 294   varobj_set_frozen (var, frozen);
 295
 296   /* We don't automatically return the new value, or what varobjs got
 297      new values during unfreezing.  If this information is required,
 298      client should call -var-update explicitly.  */
 299 }
 300
 301 void
 302 mi_cmd_var_show_format (const char *command, char **argv, int argc)
 303 {
 304   struct ui_out *uiout = current_uiout;
 305   enum varobj_display_formats format;
 306   struct varobj *var;
 307
 308   if (argc != 1)
 309     error (_("-var-show-format: Usage: NAME."));
 310
 311   /* Get varobj handle, if a valid var obj name was specified.  */
 312   var = varobj_get_handle (argv[0]);
 313
 314   format = varobj_get_display_format (var);
 315
 316   /* Report the current format.  */
 317   uiout->field_string ("format", varobj_format_string[(int) format]);
 318 }
 319
 320 void
 321 mi_cmd_var_info_num_children (const char *command, char **argv, int argc)
 322 {
 323   struct ui_out *uiout = current_uiout;
 324   struct varobj *var;
 325
 326   if (argc != 1)
 327     error (_("-var-info-num-children: Usage: NAME."));
 328
 329   /* Get varobj handle, if a valid var obj name was specified.  */
 330   var = varobj_get_handle (argv[0]);
 331
 332   uiout->field_int ("numchild", varobj_get_num_children (var));
 333 }
 334
 335 /* Return 1 if given the argument PRINT_VALUES we should display
 336    the varobj VAR.  */
 337
 338 static int
 339 mi_print_value_p (struct varobj *var, enum print_values print_values)
 340 {
 341   struct type *type;
 342
 343   if (print_values == PRINT_NO_VALUES)
 344     return 0;
 345
 346   if (print_values == PRINT_ALL_VALUES)
 347     return 1;
 348
 349   if (varobj_is_dynamic_p (var))
 350     return 1;
 351
 352   type = varobj_get_gdb_type (var);
 353   if (type == NULL)
 354     return 1;
 355   else
 356     {
 357       type = check_typedef (type);
 358
 359       /* For PRINT_SIMPLE_VALUES, only print the value if it has a type
 360          and that type is not a compound type.  */
 361       return (TYPE_CODE (type) != TYPE_CODE_ARRAY
 362               && TYPE_CODE (type) != TYPE_CODE_STRUCT
 363               && TYPE_CODE (type) != TYPE_CODE_UNION);
 364     }
 365 }
 366
 367 void
 368 mi_cmd_var_list_children (const char *command, char **argv, int argc)
 369 {
 370   struct ui_out *uiout = current_uiout;
 371   struct varobj *var;
 372   VEC(varobj_p) *children;
 373   struct varobj *child;
 374   enum print_values print_values;
 375   int ix;
 376   int from, to;
 377
 378   if (argc < 1 || argc > 4)
 379     error (_("-var-list-children: Usage: "
 380              "[PRINT_VALUES] NAME [FROM TO]"));
 381
 382   /* Get varobj handle, if a valid var obj name was specified.  */
 383   if (argc == 1 || argc == 3)
 384     var = varobj_get_handle (argv[0]);
 385   else
 386     var = varobj_get_handle (argv[1]);
 387
 388   if (argc > 2)
 389     {
 390       from = atoi (argv[argc - 2]);
 391       to = atoi (argv[argc - 1]);
 392     }
 393   else
 394     {
 395       from = -1;
 396       to = -1;
 397     }
 398
 399   children = varobj_list_children (var, &from, &to);
 400   uiout->field_int ("numchild", to - from);
 401   if (argc == 2 || argc == 4)
 402     print_values = mi_parse_print_values (argv[0]);
 403   else
 404     print_values = PRINT_NO_VALUES;
 405
 406   gdb::unique_xmalloc_ptr<char> display_hint = varobj_get_display_hint (var);
 407   if (display_hint)
 408     uiout->field_string ("displayhint", display_hint.get ());
 409
 410   if (from < to)
 411     {
 412       struct cleanup *cleanup_children;
 413
 414       if (mi_version (uiout) == 1)
 415         cleanup_children
 416           = make_cleanup_ui_out_tuple_begin_end (uiout, "children");
 417       else
 418         cleanup_children
 419           = make_cleanup_ui_out_list_begin_end (uiout, "children");
 420       for (ix = from;
 421            ix < to && VEC_iterate (varobj_p, children, ix, child);
 422            ++ix)
 423         {
 424           struct cleanup *cleanup_child;
 425
 426           cleanup_child = make_cleanup_ui_out_tuple_begin_end (uiout, "child");
 427           print_varobj (child, print_values, 1 /* print expression */);
 428           do_cleanups (cleanup_child);
 429         }
 430       do_cleanups (cleanup_children);
 431     }
 432
 433   uiout->field_int ("has_more", varobj_has_more (var, to));
 434 }
 435
 436 void
 437 mi_cmd_var_info_type (const char *command, char **argv, int argc)
 438 {
 439   struct ui_out *uiout = current_uiout;
 440   struct varobj *var;
 441
 442   if (argc != 1)
 443     error (_("-var-info-type: Usage: NAME."));
 444
 445   /* Get varobj handle, if a valid var obj name was specified.  */
 446   var = varobj_get_handle (argv[0]);
 447
 448   std::string type_name = varobj_get_type (var);
 449   uiout->field_string ("type", type_name.c_str ());
 450 }
 451
 452 void
 453 mi_cmd_var_info_path_expression (const char *command, char **argv, int argc)
 454 {
 455   struct ui_out *uiout = current_uiout;
 456   struct varobj *var;
 457
 458   if (argc != 1)
 459     error (_("Usage: NAME."));
 460
 461   /* Get varobj handle, if a valid var obj name was specified.  */
 462   var = varobj_get_handle (argv[0]);
 463
 464   const char *path_expr = varobj_get_path_expr (var);
 465
 466   uiout->field_string ("path_expr", path_expr);
 467 }
 468
 469 void
 470 mi_cmd_var_info_expression (const char *command, char **argv, int argc)
 471 {
 472   struct ui_out *uiout = current_uiout;
 473   const struct language_defn *lang;
 474   struct varobj *var;
 475
 476   if (argc != 1)
 477     error (_("-var-info-expression: Usage: NAME."));
 478
 479   /* Get varobj handle, if a valid var obj name was specified.  */
 480   var = varobj_get_handle (argv[0]);
 481
 482   lang = varobj_get_language (var);
 483
 484   uiout->field_string ("lang", lang->la_natural_name);
 485
 486   std::string exp = varobj_get_expression (var);
 487   uiout->field_string ("exp", exp.c_str ());
 488 }
 489
 490 void
 491 mi_cmd_var_show_attributes (const char *command, char **argv, int argc)
 492 {
 493   struct ui_out *uiout = current_uiout;
 494   int attr;
 495   const char *attstr;
 496   struct varobj *var;
 497
 498   if (argc != 1)
 499     error (_("-var-show-attributes: Usage: NAME."));
 500
 501   /* Get varobj handle, if a valid var obj name was specified */
 502   var = varobj_get_handle (argv[0]);
 503
 504   attr = varobj_get_attributes (var);
 505   /* FIXME: define masks for attributes */
 506   if (attr & 0x00000001)
 507     attstr = "editable";
 508   else
 509     attstr = "noneditable";
 510
 511   uiout->field_string ("attr", attstr);
 512 }
 513
 514 void
 515 mi_cmd_var_evaluate_expression (const char *command, char **argv, int argc)
 516 {
 517   struct ui_out *uiout = current_uiout;
 518   struct varobj *var;
 519
 520   enum varobj_display_formats format;
 521   int formatFound;
 522   int oind;
 523   char *oarg;
 524
 525   enum opt
 526   {
 527     OP_FORMAT
 528   };
 529   static const struct mi_opt opts[] =
 530     {
 531       {"f", OP_FORMAT, 1},
 532       { 0, 0, 0 }
 533     };
 534
 535   /* Parse arguments.  */
 536   format = FORMAT_NATURAL;
 537   formatFound = 0;
 538   oind = 0;
 539   while (1)
 540     {
 541       int opt = mi_getopt ("-var-evaluate-expression", argc, argv,
 542                            opts, &oind, &oarg);
 543
 544       if (opt < 0)
 545         break;
 546       switch ((enum opt) opt)
 547         {
 548         case OP_FORMAT:
 549           if (formatFound)
 550             error (_("Cannot specify format more than once"));
 551
 552           format = mi_parse_format (oarg);
 553           formatFound = 1;
 554           break;
 555         }
 556     }
 557
 558   if (oind >= argc)
 559     error (_("Usage: [-f FORMAT] NAME"));
 560
 561   if (oind < argc - 1)
 562     error (_("Garbage at end of command"));
 563
 564   /* Get varobj handle, if a valid var obj name was specified.  */
 565   var = varobj_get_handle (argv[oind]);
 566
 567   if (formatFound)
 568     {
 569       std::string val = varobj_get_formatted_value (var, format);
 570
 571       uiout->field_string ("value", val.c_str ());
 572     }
 573   else
 574     {
 575       std::string val = varobj_get_value (var);
 576
 577       uiout->field_string ("value", val.c_str ());
 578     }
 579 }
 580
 581 void
 582 mi_cmd_var_assign (const char *command, char **argv, int argc)
 583 {
 584   struct ui_out *uiout = current_uiout;
 585   struct varobj *var;
 586
 587   if (argc != 2)
 588     error (_("-var-assign: Usage: NAME EXPRESSION."));
 589
 590   /* Get varobj handle, if a valid var obj name was specified.  */
 591   var = varobj_get_handle (argv[0]);
 592
 593   if (!varobj_editable_p (var))
 594     error (_("-var-assign: Variable object is not editable"));
 595
 596   const char *expression = argv[1];
 597
 598   /* MI command '-var-assign' may write memory, so suppress memory
 599      changed notification if it does.  */
 600   scoped_restore save_suppress
 601     = make_scoped_restore (&mi_suppress_notification.memory, 1);
 602
 603   if (!varobj_set_value (var, expression))
 604     error (_("-var-assign: Could not assign "
 605              "expression to variable object"));
 606
 607   std::string val = varobj_get_value (var);
 608   uiout->field_string ("value", val.c_str ());
 609 }
 610
 611 /* Type used for parameters passing to mi_cmd_var_update_iter.  */
 612
 613 struct mi_cmd_var_update
 614   {
 615     int only_floating;
 616     enum print_values print_values;
 617   };
 618
 619 /* Helper for mi_cmd_var_update - update each VAR.  */
 620
 621 static void
 622 mi_cmd_var_update_iter (struct varobj *var, void *data_pointer)
 623 {
 624   struct mi_cmd_var_update *data = (struct mi_cmd_var_update *) data_pointer;
 625   int thread_id, thread_stopped;
 626
 627   thread_id = varobj_get_thread_id (var);
 628
 629   if (thread_id == -1
 630       && (ptid_equal (inferior_ptid, null_ptid)
 631           || is_stopped (inferior_ptid)))
 632     thread_stopped = 1;
 633   else
 634     {
 635       struct thread_info *tp = find_thread_global_id (thread_id);
 636
 637       if (tp)
 638         thread_stopped = is_stopped (tp->ptid);
 639       else
 640         thread_stopped = 1;
 641     }
 642
 643   if (thread_stopped
 644       && (!data->only_floating || varobj_floating_p (var)))
 645     varobj_update_one (var, data->print_values, 0 /* implicit */);
 646 }
 647
 648 void
 649 mi_cmd_var_update (const char *command, char **argv, int argc)
 650 {
 651   struct ui_out *uiout = current_uiout;
 652   struct cleanup *cleanup;
 653   char *name;
 654   enum print_values print_values;
 655
 656   if (argc != 1 && argc != 2)
 657     error (_("-var-update: Usage: [PRINT_VALUES] NAME."));
 658
 659   if (argc == 1)
 660     name = argv[0];
 661   else
 662     name = argv[1];
 663
 664   if (argc == 2)
 665     print_values = mi_parse_print_values (argv[0]);
 666   else
 667     print_values = PRINT_NO_VALUES;
 668
 669   if (mi_version (uiout) <= 1)
 670     cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, "changelist");
 671   else
 672     cleanup = make_cleanup_ui_out_list_begin_end (uiout, "changelist");
 673
 674   /* Check if the parameter is a "*", which means that we want to
 675      update all variables.  */
 676
 677   if ((*name == '*' || *name == '@') && (*(name + 1) == '\0'))
 678     {
 679       struct mi_cmd_var_update data;
 680
 681       data.only_floating = (*name == '@');
 682       data.print_values = print_values;
 683
 684       /* varobj_update_one automatically updates all the children of
 685          VAROBJ.  Therefore update each VAROBJ only once by iterating
 686          only the root VAROBJs.  */
 687
 688       all_root_varobjs (mi_cmd_var_update_iter, &data);
 689     }
 690   else
 691     {
 692       /* Get varobj handle, if a valid var obj name was specified.  */
 693       struct varobj *var = varobj_get_handle (name);
 694
 695       varobj_update_one (var, print_values, 1 /* explicit */);
 696     }
 697
 698   do_cleanups (cleanup);
 699 }
 700
 701 /* Helper for mi_cmd_var_update().  */
 702
 703 static void
 704 varobj_update_one (struct varobj *var, enum print_values print_values,
 705                    int is_explicit)
 706 {
 707   struct ui_out *uiout = current_uiout;
 708   VEC (varobj_update_result) *changes;
 709   varobj_update_result *r;
 710   int i;
 711
 712   changes = varobj_update (&var, is_explicit);
 713
 714   for (i = 0; VEC_iterate (varobj_update_result, changes, i, r); ++i)
 715     {
 716       int from, to;
 717       struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
 718
 719       if (mi_version (uiout) > 1)
 720         make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 721       uiout->field_string ("name", varobj_get_objname (r->varobj));
 722
 723       switch (r->status)
 724         {
 725         case VAROBJ_IN_SCOPE:
 726           if (mi_print_value_p (r->varobj, print_values))
 727             {
 728               std::string val = varobj_get_value (r->varobj);
 729
 730               uiout->field_string ("value", val.c_str ());
 731             }
 732           uiout->field_string ("in_scope", "true");
 733           break;
 734         case VAROBJ_NOT_IN_SCOPE:
 735           uiout->field_string ("in_scope", "false");
 736           break;
 737         case VAROBJ_INVALID:
 738           uiout->field_string ("in_scope", "invalid");
 739           break;
 740         }
 741
 742       if (r->status != VAROBJ_INVALID)
 743         {
 744           if (r->type_changed)
 745             uiout->field_string ("type_changed", "true");
 746           else
 747             uiout->field_string ("type_changed", "false");
 748         }
 749
 750       if (r->type_changed)
 751         {
 752           std::string type_name = varobj_get_type (r->varobj);
 753
 754           uiout->field_string ("new_type", type_name.c_str ());
 755         }
 756
 757       if (r->type_changed || r->children_changed)
 758         uiout->field_int ("new_num_children",
 759                           varobj_get_num_children (r->varobj));
 760
 761       gdb::unique_xmalloc_ptr<char> display_hint
 762         = varobj_get_display_hint (r->varobj);
 763       if (display_hint)
 764         uiout->field_string ("displayhint", display_hint.get ());
 765
 766       if (varobj_is_dynamic_p (r->varobj))
 767         uiout->field_int ("dynamic", 1);
 768
 769       varobj_get_child_range (r->varobj, &from, &to);
 770       uiout->field_int ("has_more", varobj_has_more (r->varobj, to));
 771
 772       if (r->newobj)
 773         {
 774           int j;
 775           varobj_p child;
 776           struct cleanup *cleanup;
 777
 778           cleanup = make_cleanup_ui_out_list_begin_end (uiout, "new_children");
 779           for (j = 0; VEC_iterate (varobj_p, r->newobj, j, child); ++j)
 780             {
 781               struct cleanup *cleanup_child;
 782
 783               cleanup_child
 784                 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 785               print_varobj (child, print_values, 1 /* print_expression */);
 786               do_cleanups (cleanup_child);
 787             }
 788
 789           do_cleanups (cleanup);
 790           VEC_free (varobj_p, r->newobj);
 791           r->newobj = NULL;     /* Paranoia.  */
 792         }
 793
 794       do_cleanups (cleanup);
 795     }
 796   VEC_free (varobj_update_result, changes);
 797 }
 798
 799 void
 800 mi_cmd_enable_pretty_printing (const char *command, char **argv, int argc)
 801 {
 802   if (argc != 0)
 803     error (_("-enable-pretty-printing: no arguments allowed"));
 804
 805   varobj_enable_pretty_printing ();
 806 }
 807
 808 void
 809 mi_cmd_var_set_update_range (const char *command, char **argv, int argc)
 810 {
 811   struct varobj *var;
 812   int from, to;
 813
 814   if (argc != 3)
 815     error (_("-var-set-update-range: Usage: VAROBJ FROM TO"));
 816
 817   var = varobj_get_handle (argv[0]);
 818   from = atoi (argv[1]);
 819   to = atoi (argv[2]);
 820
 821   varobj_set_child_range (var, from, to);
 822 }