gdb/mi/mi-cmd-var.c

   1 /* MI Command Set - varobj commands.
   2    Copyright (C) 2000-2016 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   char *type;
  53   int thread_id;
  54   char *display_hint;
  55
  56   ui_out_field_string (uiout, "name", varobj_get_objname (var));
  57   if (print_expression)
  58     {
  59       char *exp = varobj_get_expression (var);
  60
  61       ui_out_field_string (uiout, "exp", exp);
  62       xfree (exp);
  63     }
  64   ui_out_field_int (uiout, "numchild", varobj_get_num_children (var));
  65
  66   if (mi_print_value_p (var, print_values))
  67     {
  68       char *val = varobj_get_value (var);
  69
  70       ui_out_field_string (uiout, "value", val);
  71       xfree (val);
  72     }
  73
  74   type = varobj_get_type (var);
  75   if (type != NULL)
  76     {
  77       ui_out_field_string (uiout, "type", type);
  78       xfree (type);
  79     }
  80
  81   thread_id = varobj_get_thread_id (var);
  82   if (thread_id > 0)
  83     ui_out_field_int (uiout, "thread-id", thread_id);
  84
  85   if (varobj_get_frozen (var))
  86     ui_out_field_int (uiout, "frozen", 1);
  87
  88   display_hint = varobj_get_display_hint (var);
  89   if (display_hint)
  90     {
  91       ui_out_field_string (uiout, "displayhint", display_hint);
  92       xfree (display_hint);
  93     }
  94
  95   if (varobj_is_dynamic_p (var))
  96     ui_out_field_int (uiout, "dynamic", 1);
  97 }
  98
  99 /* VAROBJ operations */
 100
 101 void
 102 mi_cmd_var_create (char *command, char **argv, int argc)
 103 {
 104   struct ui_out *uiout = current_uiout;
 105   CORE_ADDR frameaddr = 0;
 106   struct varobj *var;
 107   char *name;
 108   char *frame;
 109   char *expr;
 110   struct cleanup *old_cleanups;
 111   enum varobj_type var_type;
 112
 113   if (argc != 3)
 114     error (_("-var-create: Usage: NAME FRAME EXPRESSION."));
 115
 116   name = xstrdup (argv[0]);
 117   /* Add cleanup for name. Must be free_current_contents as name can
 118      be reallocated.  */
 119   old_cleanups = make_cleanup (free_current_contents, &name);
 120
 121   frame = xstrdup (argv[1]);
 122   make_cleanup (xfree, frame);
 123
 124   expr = xstrdup (argv[2]);
 125   make_cleanup (xfree, expr);
 126
 127   if (strcmp (name, "-") == 0)
 128     {
 129       xfree (name);
 130       name = varobj_gen_name ();
 131     }
 132   else if (!isalpha (*name))
 133     error (_("-var-create: name of object must begin with a letter"));
 134
 135   if (strcmp (frame, "*") == 0)
 136     var_type = USE_CURRENT_FRAME;
 137   else if (strcmp (frame, "@") == 0)
 138     var_type = USE_SELECTED_FRAME;
 139   else
 140     {
 141       var_type = USE_SPECIFIED_FRAME;
 142       frameaddr = string_to_core_addr (frame);
 143     }
 144
 145   if (varobjdebug)
 146     fprintf_unfiltered (gdb_stdlog,
 147                     "Name=\"%s\", Frame=\"%s\" (%s), Expression=\"%s\"\n",
 148                         name, frame, hex_string (frameaddr), expr);
 149
 150   var = varobj_create (name, expr, frameaddr, var_type);
 151
 152   if (var == NULL)
 153     error (_("-var-create: unable to create variable object"));
 154
 155   print_varobj (var, PRINT_ALL_VALUES, 0 /* don't print expression */);
 156
 157   ui_out_field_int (uiout, "has_more", varobj_has_more (var, 0));
 158
 159   do_cleanups (old_cleanups);
 160 }
 161
 162 void
 163 mi_cmd_var_delete (char *command, char **argv, int argc)
 164 {
 165   char *name;
 166   struct varobj *var;
 167   int numdel;
 168   int children_only_p = 0;
 169   struct cleanup *old_cleanups;
 170   struct ui_out *uiout = current_uiout;
 171
 172   if (argc < 1 || argc > 2)
 173     error (_("-var-delete: Usage: [-c] EXPRESSION."));
 174
 175   name = xstrdup (argv[0]);
 176   /* Add cleanup for name. Must be free_current_contents as name can
 177      be reallocated.  */
 178   old_cleanups = make_cleanup (free_current_contents, &name);
 179
 180   /* If we have one single argument it cannot be '-c' or any string
 181      starting with '-'.  */
 182   if (argc == 1)
 183     {
 184       if (strcmp (name, "-c") == 0)
 185         error (_("-var-delete: Missing required "
 186                  "argument after '-c': variable object name"));
 187       if (*name == '-')
 188         error (_("-var-delete: Illegal variable object name"));
 189     }
 190
 191   /* If we have 2 arguments they must be '-c' followed by a string
 192      which would be the variable name.  */
 193   if (argc == 2)
 194     {
 195       if (strcmp (name, "-c") != 0)
 196         error (_("-var-delete: Invalid option."));
 197       children_only_p = 1;
 198       do_cleanups (old_cleanups);
 199       name = xstrdup (argv[1]);
 200       old_cleanups = make_cleanup (free_current_contents, &name);
 201     }
 202
 203   /* If we didn't error out, now NAME contains the name of the
 204      variable.  */
 205
 206   var = varobj_get_handle (name);
 207
 208   numdel = varobj_delete (var, children_only_p);
 209
 210   ui_out_field_int (uiout, "ndeleted", numdel);
 211
 212   do_cleanups (old_cleanups);
 213 }
 214
 215 /* Parse a string argument into a format value.  */
 216
 217 static enum varobj_display_formats
 218 mi_parse_format (const char *arg)
 219 {
 220   if (arg != NULL)
 221     {
 222       int len;
 223
 224       len = strlen (arg);
 225
 226       if (strncmp (arg, "natural", len) == 0)
 227         return FORMAT_NATURAL;
 228       else if (strncmp (arg, "binary", len) == 0)
 229         return FORMAT_BINARY;
 230       else if (strncmp (arg, "decimal", len) == 0)
 231         return FORMAT_DECIMAL;
 232       else if (strncmp (arg, "hexadecimal", len) == 0)
 233         return FORMAT_HEXADECIMAL;
 234       else if (strncmp (arg, "octal", len) == 0)
 235         return FORMAT_OCTAL;
 236       else if (strncmp (arg, "zero-hexadecimal", len) == 0)
 237         return FORMAT_ZHEXADECIMAL;
 238     }
 239
 240   error (_("Must specify the format as: \"natural\", "
 241            "\"binary\", \"decimal\", \"hexadecimal\", \"octal\" or \"zero-hexadecimal\""));
 242 }
 243
 244 void
 245 mi_cmd_var_set_format (char *command, char **argv, int argc)
 246 {
 247   enum varobj_display_formats format;
 248   struct varobj *var;
 249   char *val;
 250   struct ui_out *uiout = current_uiout;
 251
 252   if (argc != 2)
 253     error (_("-var-set-format: Usage: NAME FORMAT."));
 254
 255   /* Get varobj handle, if a valid var obj name was specified.  */
 256   var = varobj_get_handle (argv[0]);
 257
 258   format = mi_parse_format (argv[1]);
 259
 260   /* Set the format of VAR to the given format.  */
 261   varobj_set_display_format (var, format);
 262
 263   /* Report the new current format.  */
 264   ui_out_field_string (uiout, "format", varobj_format_string[(int) format]);
 265
 266   /* Report the value in the new format.  */
 267   val = varobj_get_value (var);
 268   ui_out_field_string (uiout, "value", val);
 269   xfree (val);
 270 }
 271
 272 void
 273 mi_cmd_var_set_visualizer (char *command, char **argv, int argc)
 274 {
 275   struct varobj *var;
 276
 277   if (argc != 2)
 278     error (_("Usage: NAME VISUALIZER_FUNCTION."));
 279
 280   var = varobj_get_handle (argv[0]);
 281
 282   if (var == NULL)
 283     error (_("Variable object not found"));
 284
 285   varobj_set_visualizer (var, argv[1]);
 286 }
 287
 288 void
 289 mi_cmd_var_set_frozen (char *command, char **argv, int argc)
 290 {
 291   struct varobj *var;
 292   int frozen;
 293
 294   if (argc != 2)
 295     error (_("-var-set-format: Usage: NAME FROZEN_FLAG."));
 296
 297   var = varobj_get_handle (argv[0]);
 298
 299   if (strcmp (argv[1], "0") == 0)
 300     frozen = 0;
 301   else if (strcmp (argv[1], "1") == 0)
 302     frozen = 1;
 303   else
 304     error (_("Invalid flag value"));
 305
 306   varobj_set_frozen (var, frozen);
 307
 308   /* We don't automatically return the new value, or what varobjs got
 309      new values during unfreezing.  If this information is required,
 310      client should call -var-update explicitly.  */
 311 }
 312
 313 void
 314 mi_cmd_var_show_format (char *command, char **argv, int argc)
 315 {
 316   struct ui_out *uiout = current_uiout;
 317   enum varobj_display_formats format;
 318   struct varobj *var;
 319
 320   if (argc != 1)
 321     error (_("-var-show-format: Usage: NAME."));
 322
 323   /* Get varobj handle, if a valid var obj name was specified.  */
 324   var = varobj_get_handle (argv[0]);
 325
 326   format = varobj_get_display_format (var);
 327
 328   /* Report the current format.  */
 329   ui_out_field_string (uiout, "format", varobj_format_string[(int) format]);
 330 }
 331
 332 void
 333 mi_cmd_var_info_num_children (char *command, char **argv, int argc)
 334 {
 335   struct ui_out *uiout = current_uiout;
 336   struct varobj *var;
 337
 338   if (argc != 1)
 339     error (_("-var-info-num-children: Usage: NAME."));
 340
 341   /* Get varobj handle, if a valid var obj name was specified.  */
 342   var = varobj_get_handle (argv[0]);
 343
 344   ui_out_field_int (uiout, "numchild", varobj_get_num_children (var));
 345 }
 346
 347 /* Return 1 if given the argument PRINT_VALUES we should display
 348    the varobj VAR.  */
 349
 350 static int
 351 mi_print_value_p (struct varobj *var, enum print_values print_values)
 352 {
 353   struct type *type;
 354
 355   if (print_values == PRINT_NO_VALUES)
 356     return 0;
 357
 358   if (print_values == PRINT_ALL_VALUES)
 359     return 1;
 360
 361   if (varobj_is_dynamic_p (var))
 362     return 1;
 363
 364   type = varobj_get_gdb_type (var);
 365   if (type == NULL)
 366     return 1;
 367   else
 368     {
 369       type = check_typedef (type);
 370
 371       /* For PRINT_SIMPLE_VALUES, only print the value if it has a type
 372          and that type is not a compound type.  */
 373       return (TYPE_CODE (type) != TYPE_CODE_ARRAY
 374               && TYPE_CODE (type) != TYPE_CODE_STRUCT
 375               && TYPE_CODE (type) != TYPE_CODE_UNION);
 376     }
 377 }
 378
 379 void
 380 mi_cmd_var_list_children (char *command, char **argv, int argc)
 381 {
 382   struct ui_out *uiout = current_uiout;
 383   struct varobj *var;
 384   VEC(varobj_p) *children;
 385   struct varobj *child;
 386   enum print_values print_values;
 387   int ix;
 388   int from, to;
 389   char *display_hint;
 390
 391   if (argc < 1 || argc > 4)
 392     error (_("-var-list-children: Usage: "
 393              "[PRINT_VALUES] NAME [FROM TO]"));
 394
 395   /* Get varobj handle, if a valid var obj name was specified.  */
 396   if (argc == 1 || argc == 3)
 397     var = varobj_get_handle (argv[0]);
 398   else
 399     var = varobj_get_handle (argv[1]);
 400
 401   if (argc > 2)
 402     {
 403       from = atoi (argv[argc - 2]);
 404       to = atoi (argv[argc - 1]);
 405     }
 406   else
 407     {
 408       from = -1;
 409       to = -1;
 410     }
 411
 412   children = varobj_list_children (var, &from, &to);
 413   ui_out_field_int (uiout, "numchild", to - from);
 414   if (argc == 2 || argc == 4)
 415     print_values = mi_parse_print_values (argv[0]);
 416   else
 417     print_values = PRINT_NO_VALUES;
 418
 419   display_hint = varobj_get_display_hint (var);
 420   if (display_hint)
 421     {
 422       ui_out_field_string (uiout, "displayhint", display_hint);
 423       xfree (display_hint);
 424     }
 425
 426   if (from < to)
 427     {
 428       struct cleanup *cleanup_children;
 429
 430       if (mi_version (uiout) == 1)
 431         cleanup_children
 432           = make_cleanup_ui_out_tuple_begin_end (uiout, "children");
 433       else
 434         cleanup_children
 435           = make_cleanup_ui_out_list_begin_end (uiout, "children");
 436       for (ix = from;
 437            ix < to && VEC_iterate (varobj_p, children, ix, child);
 438            ++ix)
 439         {
 440           struct cleanup *cleanup_child;
 441
 442           cleanup_child = make_cleanup_ui_out_tuple_begin_end (uiout, "child");
 443           print_varobj (child, print_values, 1 /* print expression */);
 444           do_cleanups (cleanup_child);
 445         }
 446       do_cleanups (cleanup_children);
 447     }
 448
 449   ui_out_field_int (uiout, "has_more", varobj_has_more (var, to));
 450 }
 451
 452 void
 453 mi_cmd_var_info_type (char *command, char **argv, int argc)
 454 {
 455   struct ui_out *uiout = current_uiout;
 456   struct varobj *var;
 457   char *type_name;
 458
 459   if (argc != 1)
 460     error (_("-var-info-type: Usage: NAME."));
 461
 462   /* Get varobj handle, if a valid var obj name was specified.  */
 463   var = varobj_get_handle (argv[0]);
 464   type_name = varobj_get_type (var);
 465
 466   ui_out_field_string (uiout, "type", type_name);
 467
 468   xfree (type_name);
 469 }
 470
 471 void
 472 mi_cmd_var_info_path_expression (char *command, char **argv, int argc)
 473 {
 474   struct ui_out *uiout = current_uiout;
 475   struct varobj *var;
 476   char *path_expr;
 477
 478   if (argc != 1)
 479     error (_("Usage: NAME."));
 480
 481   /* Get varobj handle, if a valid var obj name was specified.  */
 482   var = varobj_get_handle (argv[0]);
 483
 484   path_expr = varobj_get_path_expr (var);
 485
 486   ui_out_field_string (uiout, "path_expr", path_expr);
 487 }
 488
 489 void
 490 mi_cmd_var_info_expression (char *command, char **argv, int argc)
 491 {
 492   struct ui_out *uiout = current_uiout;
 493   const struct language_defn *lang;
 494   struct varobj *var;
 495   char *exp;
 496
 497   if (argc != 1)
 498     error (_("-var-info-expression: Usage: NAME."));
 499
 500   /* Get varobj handle, if a valid var obj name was specified.  */
 501   var = varobj_get_handle (argv[0]);
 502
 503   lang = varobj_get_language (var);
 504
 505   ui_out_field_string (uiout, "lang", lang->la_natural_name);
 506
 507   exp = varobj_get_expression (var);
 508   ui_out_field_string (uiout, "exp", exp);
 509   xfree (exp);
 510 }
 511
 512 void
 513 mi_cmd_var_show_attributes (char *command, char **argv, int argc)
 514 {
 515   struct ui_out *uiout = current_uiout;
 516   int attr;
 517   char *attstr;
 518   struct varobj *var;
 519
 520   if (argc != 1)
 521     error (_("-var-show-attributes: Usage: NAME."));
 522
 523   /* Get varobj handle, if a valid var obj name was specified */
 524   var = varobj_get_handle (argv[0]);
 525
 526   attr = varobj_get_attributes (var);
 527   /* FIXME: define masks for attributes */
 528   if (attr & 0x00000001)
 529     attstr = "editable";
 530   else
 531     attstr = "noneditable";
 532
 533   ui_out_field_string (uiout, "attr", attstr);
 534 }
 535
 536 void
 537 mi_cmd_var_evaluate_expression (char *command, char **argv, int argc)
 538 {
 539   struct ui_out *uiout = current_uiout;
 540   struct varobj *var;
 541
 542   enum varobj_display_formats format;
 543   int formatFound;
 544   int oind;
 545   char *oarg;
 546
 547   enum opt
 548   {
 549     OP_FORMAT
 550   };
 551   static const struct mi_opt opts[] =
 552     {
 553       {"f", OP_FORMAT, 1},
 554       { 0, 0, 0 }
 555     };
 556
 557   /* Parse arguments.  */
 558   format = FORMAT_NATURAL;
 559   formatFound = 0;
 560   oind = 0;
 561   while (1)
 562     {
 563       int opt = mi_getopt ("-var-evaluate-expression", argc, argv,
 564                            opts, &oind, &oarg);
 565
 566       if (opt < 0)
 567         break;
 568       switch ((enum opt) opt)
 569         {
 570         case OP_FORMAT:
 571           if (formatFound)
 572             error (_("Cannot specify format more than once"));
 573
 574           format = mi_parse_format (oarg);
 575           formatFound = 1;
 576           break;
 577         }
 578     }
 579
 580   if (oind >= argc)
 581     error (_("Usage: [-f FORMAT] NAME"));
 582
 583   if (oind < argc - 1)
 584     error (_("Garbage at end of command"));
 585
 586   /* Get varobj handle, if a valid var obj name was specified.  */
 587   var = varobj_get_handle (argv[oind]);
 588
 589   if (formatFound)
 590     {
 591       char *val = varobj_get_formatted_value (var, format);
 592
 593       ui_out_field_string (uiout, "value", val);
 594       xfree (val);
 595     }
 596   else
 597     {
 598       char *val = varobj_get_value (var);
 599
 600       ui_out_field_string (uiout, "value", val);
 601       xfree (val);
 602     }
 603 }
 604
 605 void
 606 mi_cmd_var_assign (char *command, char **argv, int argc)
 607 {
 608   struct ui_out *uiout = current_uiout;
 609   struct varobj *var;
 610   char *expression, *val;
 611   struct cleanup *cleanup;
 612
 613   if (argc != 2)
 614     error (_("-var-assign: Usage: NAME EXPRESSION."));
 615
 616   /* Get varobj handle, if a valid var obj name was specified.  */
 617   var = varobj_get_handle (argv[0]);
 618
 619   if (!varobj_editable_p (var))
 620     error (_("-var-assign: Variable object is not editable"));
 621
 622   expression = xstrdup (argv[1]);
 623
 624   /* MI command '-var-assign' may write memory, so suppress memory
 625      changed notification if it does.  */
 626   cleanup
 627     = make_cleanup_restore_integer (&mi_suppress_notification.memory);
 628   mi_suppress_notification.memory = 1;
 629
 630   if (!varobj_set_value (var, expression))
 631     error (_("-var-assign: Could not assign "
 632              "expression to variable object"));
 633
 634   val = varobj_get_value (var);
 635   ui_out_field_string (uiout, "value", val);
 636   xfree (val);
 637
 638   do_cleanups (cleanup);
 639 }
 640
 641 /* Type used for parameters passing to mi_cmd_var_update_iter.  */
 642
 643 struct mi_cmd_var_update
 644   {
 645     int only_floating;
 646     enum print_values print_values;
 647   };
 648
 649 /* Helper for mi_cmd_var_update - update each VAR.  */
 650
 651 static void
 652 mi_cmd_var_update_iter (struct varobj *var, void *data_pointer)
 653 {
 654   struct mi_cmd_var_update *data = (struct mi_cmd_var_update *) data_pointer;
 655   int thread_id, thread_stopped;
 656
 657   thread_id = varobj_get_thread_id (var);
 658
 659   if (thread_id == -1
 660       && (ptid_equal (inferior_ptid, null_ptid)
 661           || is_stopped (inferior_ptid)))
 662     thread_stopped = 1;
 663   else
 664     {
 665       struct thread_info *tp = find_thread_global_id (thread_id);
 666
 667       if (tp)
 668         thread_stopped = is_stopped (tp->ptid);
 669       else
 670         thread_stopped = 1;
 671     }
 672
 673   if (thread_stopped
 674       && (!data->only_floating || varobj_floating_p (var)))
 675     varobj_update_one (var, data->print_values, 0 /* implicit */);
 676 }
 677
 678 void
 679 mi_cmd_var_update (char *command, char **argv, int argc)
 680 {
 681   struct ui_out *uiout = current_uiout;
 682   struct cleanup *cleanup;
 683   char *name;
 684   enum print_values print_values;
 685
 686   if (argc != 1 && argc != 2)
 687     error (_("-var-update: Usage: [PRINT_VALUES] NAME."));
 688
 689   if (argc == 1)
 690     name = argv[0];
 691   else
 692     name = argv[1];
 693
 694   if (argc == 2)
 695     print_values = mi_parse_print_values (argv[0]);
 696   else
 697     print_values = PRINT_NO_VALUES;
 698
 699   if (mi_version (uiout) <= 1)
 700     cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, "changelist");
 701   else
 702     cleanup = make_cleanup_ui_out_list_begin_end (uiout, "changelist");
 703
 704   /* Check if the parameter is a "*", which means that we want to
 705      update all variables.  */
 706
 707   if ((*name == '*' || *name == '@') && (*(name + 1) == '\0'))
 708     {
 709       struct mi_cmd_var_update data;
 710
 711       data.only_floating = (*name == '@');
 712       data.print_values = print_values;
 713
 714       /* varobj_update_one automatically updates all the children of
 715          VAROBJ.  Therefore update each VAROBJ only once by iterating
 716          only the root VAROBJs.  */
 717
 718       all_root_varobjs (mi_cmd_var_update_iter, &data);
 719     }
 720   else
 721     {
 722       /* Get varobj handle, if a valid var obj name was specified.  */
 723       struct varobj *var = varobj_get_handle (name);
 724
 725       varobj_update_one (var, print_values, 1 /* explicit */);
 726     }
 727
 728   do_cleanups (cleanup);
 729 }
 730
 731 /* Helper for mi_cmd_var_update().  */
 732
 733 static void
 734 varobj_update_one (struct varobj *var, enum print_values print_values,
 735                    int is_explicit)
 736 {
 737   struct ui_out *uiout = current_uiout;
 738   VEC (varobj_update_result) *changes;
 739   varobj_update_result *r;
 740   int i;
 741
 742   changes = varobj_update (&var, is_explicit);
 743
 744   for (i = 0; VEC_iterate (varobj_update_result, changes, i, r); ++i)
 745     {
 746       char *display_hint;
 747       int from, to;
 748       struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
 749
 750       if (mi_version (uiout) > 1)
 751         make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 752       ui_out_field_string (uiout, "name", varobj_get_objname (r->varobj));
 753
 754       switch (r->status)
 755         {
 756         case VAROBJ_IN_SCOPE:
 757           if (mi_print_value_p (r->varobj, print_values))
 758             {
 759               char *val = varobj_get_value (r->varobj);
 760
 761               ui_out_field_string (uiout, "value", val);
 762               xfree (val);
 763             }
 764           ui_out_field_string (uiout, "in_scope", "true");
 765           break;
 766         case VAROBJ_NOT_IN_SCOPE:
 767           ui_out_field_string (uiout, "in_scope", "false");
 768           break;
 769         case VAROBJ_INVALID:
 770           ui_out_field_string (uiout, "in_scope", "invalid");
 771           break;
 772         }
 773
 774       if (r->status != VAROBJ_INVALID)
 775         {
 776           if (r->type_changed)
 777             ui_out_field_string (uiout, "type_changed", "true");
 778           else
 779             ui_out_field_string (uiout, "type_changed", "false");
 780         }
 781
 782       if (r->type_changed)
 783         {
 784           char *type_name = varobj_get_type (r->varobj);
 785
 786           ui_out_field_string (uiout, "new_type", type_name);
 787           xfree (type_name);
 788         }
 789
 790       if (r->type_changed || r->children_changed)
 791         ui_out_field_int (uiout, "new_num_children",
 792                           varobj_get_num_children (r->varobj));
 793
 794       display_hint = varobj_get_display_hint (r->varobj);
 795       if (display_hint)
 796         {
 797           ui_out_field_string (uiout, "displayhint", display_hint);
 798           xfree (display_hint);
 799         }
 800
 801       if (varobj_is_dynamic_p (r->varobj))
 802         ui_out_field_int (uiout, "dynamic", 1);
 803
 804       varobj_get_child_range (r->varobj, &from, &to);
 805       ui_out_field_int (uiout, "has_more",
 806                         varobj_has_more (r->varobj, to));
 807
 808       if (r->newobj)
 809         {
 810           int j;
 811           varobj_p child;
 812           struct cleanup *cleanup;
 813
 814           cleanup = make_cleanup_ui_out_list_begin_end (uiout, "new_children");
 815           for (j = 0; VEC_iterate (varobj_p, r->newobj, j, child); ++j)
 816             {
 817               struct cleanup *cleanup_child;
 818
 819               cleanup_child
 820                 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 821               print_varobj (child, print_values, 1 /* print_expression */);
 822               do_cleanups (cleanup_child);
 823             }
 824
 825           do_cleanups (cleanup);
 826           VEC_free (varobj_p, r->newobj);
 827           r->newobj = NULL;     /* Paranoia.  */
 828         }
 829
 830       do_cleanups (cleanup);
 831     }
 832   VEC_free (varobj_update_result, changes);
 833 }
 834
 835 void
 836 mi_cmd_enable_pretty_printing (char *command, char **argv, int argc)
 837 {
 838   if (argc != 0)
 839     error (_("-enable-pretty-printing: no arguments allowed"));
 840
 841   varobj_enable_pretty_printing ();
 842 }
 843
 844 void
 845 mi_cmd_var_set_update_range (char *command, char **argv, int argc)
 846 {
 847   struct varobj *var;
 848   int from, to;
 849
 850   if (argc != 3)
 851     error (_("-var-set-update-range: Usage: VAROBJ FROM TO"));
 852
 853   var = varobj_get_handle (argv[0]);
 854   from = atoi (argv[1]);
 855   to = atoi (argv[2]);
 856
 857   varobj_set_child_range (var, from, to);
 858 }