gdb/mi/mi-cmd-var.c

   1 /* MI Command Set - varobj commands.
   2    Copyright (C) 2000-2013 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 "value.h"
  28 #include <ctype.h>
  29 #include "gdb_string.h"
  30 #include "mi-getopt.h"
  31 #include "gdbthread.h"
  32
  33 const char mi_no_values[] = "--no-values";
  34 const char mi_simple_values[] = "--simple-values";
  35 const char mi_all_values[] = "--all-values";
  36
  37 extern unsigned int varobjdebug;                /* defined in varobj.c.  */
  38
  39 static void varobj_update_one (struct varobj *var,
  40                                enum print_values print_values,
  41                                int explicit);
  42
  43 static int mi_print_value_p (struct varobj *var,
  44                              enum print_values print_values);
  45
  46 /* Print variable object VAR.  The PRINT_VALUES parameter controls
  47    if the value should be printed.  The PRINT_EXPRESSION parameter
  48    controls if the expression should be printed.  */
  49
  50 static void
  51 print_varobj (struct varobj *var, enum print_values print_values,
  52               int print_expression)
  53 {
  54   struct ui_out *uiout = current_uiout;
  55   char *type;
  56   int thread_id;
  57   char *display_hint;
  58
  59   ui_out_field_string (uiout, "name", varobj_get_objname (var));
  60   if (print_expression)
  61     ui_out_field_string (uiout, "exp", varobj_get_expression (var));
  62   ui_out_field_int (uiout, "numchild", varobj_get_num_children (var));
  63
  64   if (mi_print_value_p (var, print_values))
  65     {
  66       char *val = varobj_get_value (var);
  67
  68       ui_out_field_string (uiout, "value", val);
  69       xfree (val);
  70     }
  71
  72   type = varobj_get_type (var);
  73   if (type != NULL)
  74     {
  75       ui_out_field_string (uiout, "type", type);
  76       xfree (type);
  77     }
  78
  79   thread_id = varobj_get_thread_id (var);
  80   if (thread_id > 0)
  81     ui_out_field_int (uiout, "thread-id", thread_id);
  82
  83   if (varobj_get_frozen (var))
  84     ui_out_field_int (uiout, "frozen", 1);
  85
  86   display_hint = varobj_get_display_hint (var);
  87   if (display_hint)
  88     {
  89       ui_out_field_string (uiout, "displayhint", display_hint);
  90       xfree (display_hint);
  91     }
  92
  93   if (varobj_pretty_printed_p (var))
  94     ui_out_field_int (uiout, "dynamic", 1);
  95 }
  96
  97 /* VAROBJ operations */
  98
  99 void
 100 mi_cmd_var_create (char *command, char **argv, int argc)
 101 {
 102   struct ui_out *uiout = current_uiout;
 103   CORE_ADDR frameaddr = 0;
 104   struct varobj *var;
 105   char *name;
 106   char *frame;
 107   char *expr;
 108   struct cleanup *old_cleanups;
 109   enum varobj_type var_type;
 110
 111   if (argc != 3)
 112     error (_("-var-create: Usage: NAME FRAME EXPRESSION."));
 113
 114   name = xstrdup (argv[0]);
 115   /* Add cleanup for name. Must be free_current_contents as name can
 116      be reallocated.  */
 117   old_cleanups = make_cleanup (free_current_contents, &name);
 118
 119   frame = xstrdup (argv[1]);
 120   make_cleanup (xfree, frame);
 121
 122   expr = xstrdup (argv[2]);
 123   make_cleanup (xfree, expr);
 124
 125   if (strcmp (name, "-") == 0)
 126     {
 127       xfree (name);
 128       name = varobj_gen_name ();
 129     }
 130   else if (!isalpha (*name))
 131     error (_("-var-create: name of object must begin with a letter"));
 132
 133   if (strcmp (frame, "*") == 0)
 134     var_type = USE_CURRENT_FRAME;
 135   else if (strcmp (frame, "@") == 0)
 136     var_type = USE_SELECTED_FRAME;
 137   else
 138     {
 139       var_type = USE_SPECIFIED_FRAME;
 140       frameaddr = string_to_core_addr (frame);
 141     }
 142
 143   if (varobjdebug)
 144     fprintf_unfiltered (gdb_stdlog,
 145                     "Name=\"%s\", Frame=\"%s\" (%s), Expression=\"%s\"\n",
 146                         name, frame, hex_string (frameaddr), expr);
 147
 148   var = varobj_create (name, expr, frameaddr, var_type);
 149
 150   if (var == NULL)
 151     error (_("-var-create: unable to create variable object"));
 152
 153   print_varobj (var, PRINT_ALL_VALUES, 0 /* don't print expression */);
 154
 155   ui_out_field_int (uiout, "has_more", varobj_has_more (var, 0));
 156
 157   do_cleanups (old_cleanups);
 158 }
 159
 160 void
 161 mi_cmd_var_delete (char *command, char **argv, int argc)
 162 {
 163   char *name;
 164   struct varobj *var;
 165   int numdel;
 166   int children_only_p = 0;
 167   struct cleanup *old_cleanups;
 168   struct ui_out *uiout = current_uiout;
 169
 170   if (argc < 1 || argc > 2)
 171     error (_("-var-delete: Usage: [-c] EXPRESSION."));
 172
 173   name = xstrdup (argv[0]);
 174   /* Add cleanup for name. Must be free_current_contents as name can
 175      be reallocated.  */
 176   old_cleanups = make_cleanup (free_current_contents, &name);
 177
 178   /* If we have one single argument it cannot be '-c' or any string
 179      starting with '-'.  */
 180   if (argc == 1)
 181     {
 182       if (strcmp (name, "-c") == 0)
 183         error (_("-var-delete: Missing required "
 184                  "argument after '-c': variable object name"));
 185       if (*name == '-')
 186         error (_("-var-delete: Illegal variable object name"));
 187     }
 188
 189   /* If we have 2 arguments they must be '-c' followed by a string
 190      which would be the variable name.  */
 191   if (argc == 2)
 192     {
 193       if (strcmp (name, "-c") != 0)
 194         error (_("-var-delete: Invalid option."));
 195       children_only_p = 1;
 196       do_cleanups (old_cleanups);
 197       name = xstrdup (argv[1]);
 198       old_cleanups = make_cleanup (free_current_contents, &name);
 199     }
 200
 201   /* If we didn't error out, now NAME contains the name of the
 202      variable.  */
 203
 204   var = varobj_get_handle (name);
 205
 206   numdel = varobj_delete (var, NULL, children_only_p);
 207
 208   ui_out_field_int (uiout, "ndeleted", numdel);
 209
 210   do_cleanups (old_cleanups);
 211 }
 212
 213 /* Parse a string argument into a format value.  */
 214
 215 static enum varobj_display_formats
 216 mi_parse_format (const char *arg)
 217 {
 218   if (arg != NULL)
 219     {
 220       int len;
 221
 222       len = strlen (arg);
 223
 224       if (strncmp (arg, "natural", len) == 0)
 225         return FORMAT_NATURAL;
 226       else if (strncmp (arg, "binary", len) == 0)
 227         return FORMAT_BINARY;
 228       else if (strncmp (arg, "decimal", len) == 0)
 229         return FORMAT_DECIMAL;
 230       else if (strncmp (arg, "hexadecimal", len) == 0)
 231         return FORMAT_HEXADECIMAL;
 232       else if (strncmp (arg, "octal", len) == 0)
 233         return FORMAT_OCTAL;
 234     }
 235
 236   error (_("Must specify the format as: \"natural\", "
 237            "\"binary\", \"decimal\", \"hexadecimal\", or \"octal\""));
 238 }
 239
 240 void
 241 mi_cmd_var_set_format (char *command, char **argv, int argc)
 242 {
 243   enum varobj_display_formats format;
 244   struct varobj *var;
 245   char *val;
 246   struct ui_out *uiout = current_uiout;
 247
 248   if (argc != 2)
 249     error (_("-var-set-format: Usage: NAME FORMAT."));
 250
 251   /* Get varobj handle, if a valid var obj name was specified.  */
 252   var = varobj_get_handle (argv[0]);
 253
 254   format = mi_parse_format (argv[1]);
 255
 256   /* Set the format of VAR to the given format.  */
 257   varobj_set_display_format (var, format);
 258
 259   /* Report the new current format.  */
 260   ui_out_field_string (uiout, "format", varobj_format_string[(int) format]);
 261
 262   /* Report the value in the new format.  */
 263   val = varobj_get_value (var);
 264   ui_out_field_string (uiout, "value", val);
 265   xfree (val);
 266 }
 267
 268 void
 269 mi_cmd_var_set_visualizer (char *command, char **argv, int argc)
 270 {
 271   struct varobj *var;
 272
 273   if (argc != 2)
 274     error (_("Usage: NAME VISUALIZER_FUNCTION."));
 275
 276   var = varobj_get_handle (argv[0]);
 277
 278   if (var == NULL)
 279     error (_("Variable object not found"));
 280
 281   varobj_set_visualizer (var, argv[1]);
 282 }
 283
 284 void
 285 mi_cmd_var_set_frozen (char *command, char **argv, int argc)
 286 {
 287   struct varobj *var;
 288   int frozen;
 289
 290   if (argc != 2)
 291     error (_("-var-set-format: Usage: NAME FROZEN_FLAG."));
 292
 293   var = varobj_get_handle (argv[0]);
 294
 295   if (strcmp (argv[1], "0") == 0)
 296     frozen = 0;
 297   else if (strcmp (argv[1], "1") == 0)
 298     frozen = 1;
 299   else
 300     error (_("Invalid flag value"));
 301
 302   varobj_set_frozen (var, frozen);
 303
 304   /* We don't automatically return the new value, or what varobjs got
 305      new values during unfreezing.  If this information is required,
 306      client should call -var-update explicitly.  */
 307 }
 308
 309 void
 310 mi_cmd_var_show_format (char *command, char **argv, int argc)
 311 {
 312   struct ui_out *uiout = current_uiout;
 313   enum varobj_display_formats format;
 314   struct varobj *var;
 315
 316   if (argc != 1)
 317     error (_("-var-show-format: Usage: NAME."));
 318
 319   /* Get varobj handle, if a valid var obj name was specified.  */
 320   var = varobj_get_handle (argv[0]);
 321
 322   format = varobj_get_display_format (var);
 323
 324   /* Report the current format.  */
 325   ui_out_field_string (uiout, "format", varobj_format_string[(int) format]);
 326 }
 327
 328 void
 329 mi_cmd_var_info_num_children (char *command, char **argv, int argc)
 330 {
 331   struct ui_out *uiout = current_uiout;
 332   struct varobj *var;
 333
 334   if (argc != 1)
 335     error (_("-var-info-num-children: Usage: NAME."));
 336
 337   /* Get varobj handle, if a valid var obj name was specified.  */
 338   var = varobj_get_handle (argv[0]);
 339
 340   ui_out_field_int (uiout, "numchild", varobj_get_num_children (var));
 341 }
 342
 343 /* Parse a string argument into a print_values value.  */
 344
 345 static enum print_values
 346 mi_parse_values_option (const char *arg)
 347 {
 348   if (strcmp (arg, "0") == 0
 349       || strcmp (arg, mi_no_values) == 0)
 350     return PRINT_NO_VALUES;
 351   else if (strcmp (arg, "1") == 0
 352            || strcmp (arg, mi_all_values) == 0)
 353     return PRINT_ALL_VALUES;
 354   else if (strcmp (arg, "2") == 0
 355            || strcmp (arg, mi_simple_values) == 0)
 356     return PRINT_SIMPLE_VALUES;
 357   else
 358     error (_("Unknown value for PRINT_VALUES\n\
 359 Must be: 0 or \"%s\", 1 or \"%s\", 2 or \"%s\""),
 360            mi_no_values, mi_simple_values, mi_all_values);
 361 }
 362
 363 /* Return 1 if given the argument PRINT_VALUES we should display
 364    the varobj VAR.  */
 365
 366 static int
 367 mi_print_value_p (struct varobj *var, enum print_values print_values)
 368 {
 369   struct type *type;
 370
 371   if (print_values == PRINT_NO_VALUES)
 372     return 0;
 373
 374   if (print_values == PRINT_ALL_VALUES)
 375     return 1;
 376
 377   if (varobj_pretty_printed_p (var))
 378     return 1;
 379
 380   type = varobj_get_gdb_type (var);
 381   if (type == NULL)
 382     return 1;
 383   else
 384     {
 385       type = check_typedef (type);
 386
 387       /* For PRINT_SIMPLE_VALUES, only print the value if it has a type
 388          and that type is not a compound type.  */
 389       return (TYPE_CODE (type) != TYPE_CODE_ARRAY
 390               && TYPE_CODE (type) != TYPE_CODE_STRUCT
 391               && TYPE_CODE (type) != TYPE_CODE_UNION);
 392     }
 393 }
 394
 395 void
 396 mi_cmd_var_list_children (char *command, char **argv, int argc)
 397 {
 398   struct ui_out *uiout = current_uiout;
 399   struct varobj *var;
 400   VEC(varobj_p) *children;
 401   struct varobj *child;
 402   enum print_values print_values;
 403   int ix;
 404   int from, to;
 405   char *display_hint;
 406
 407   if (argc < 1 || argc > 4)
 408     error (_("-var-list-children: Usage: "
 409              "[PRINT_VALUES] NAME [FROM TO]"));
 410
 411   /* Get varobj handle, if a valid var obj name was specified.  */
 412   if (argc == 1 || argc == 3)
 413     var = varobj_get_handle (argv[0]);
 414   else
 415     var = varobj_get_handle (argv[1]);
 416
 417   if (argc > 2)
 418     {
 419       from = atoi (argv[argc - 2]);
 420       to = atoi (argv[argc - 1]);
 421     }
 422   else
 423     {
 424       from = -1;
 425       to = -1;
 426     }
 427
 428   children = varobj_list_children (var, &from, &to);
 429   ui_out_field_int (uiout, "numchild", to - from);
 430   if (argc == 2 || argc == 4)
 431     print_values = mi_parse_values_option (argv[0]);
 432   else
 433     print_values = PRINT_NO_VALUES;
 434
 435   display_hint = varobj_get_display_hint (var);
 436   if (display_hint)
 437     {
 438       ui_out_field_string (uiout, "displayhint", display_hint);
 439       xfree (display_hint);
 440     }
 441
 442   if (from < to)
 443     {
 444       struct cleanup *cleanup_children;
 445
 446       if (mi_version (uiout) == 1)
 447         cleanup_children
 448           = make_cleanup_ui_out_tuple_begin_end (uiout, "children");
 449       else
 450         cleanup_children
 451           = make_cleanup_ui_out_list_begin_end (uiout, "children");
 452       for (ix = from;
 453            ix < to && VEC_iterate (varobj_p, children, ix, child);
 454            ++ix)
 455         {
 456           struct cleanup *cleanup_child;
 457
 458           cleanup_child = make_cleanup_ui_out_tuple_begin_end (uiout, "child");
 459           print_varobj (child, print_values, 1 /* print expression */);
 460           do_cleanups (cleanup_child);
 461         }
 462       do_cleanups (cleanup_children);
 463     }
 464
 465   ui_out_field_int (uiout, "has_more", varobj_has_more (var, to));
 466 }
 467
 468 void
 469 mi_cmd_var_info_type (char *command, char **argv, int argc)
 470 {
 471   struct ui_out *uiout = current_uiout;
 472   struct varobj *var;
 473
 474   if (argc != 1)
 475     error (_("-var-info-type: Usage: NAME."));
 476
 477   /* Get varobj handle, if a valid var obj name was specified.  */
 478   var = varobj_get_handle (argv[0]);
 479
 480   ui_out_field_string (uiout, "type", varobj_get_type (var));
 481 }
 482
 483 void
 484 mi_cmd_var_info_path_expression (char *command, char **argv, int argc)
 485 {
 486   struct ui_out *uiout = current_uiout;
 487   struct varobj *var;
 488   char *path_expr;
 489
 490   if (argc != 1)
 491     error (_("Usage: NAME."));
 492
 493   /* Get varobj handle, if a valid var obj name was specified.  */
 494   var = varobj_get_handle (argv[0]);
 495
 496   path_expr = varobj_get_path_expr (var);
 497
 498   ui_out_field_string (uiout, "path_expr", path_expr);
 499 }
 500
 501 void
 502 mi_cmd_var_info_expression (char *command, char **argv, int argc)
 503 {
 504   struct ui_out *uiout = current_uiout;
 505   enum varobj_languages lang;
 506   struct varobj *var;
 507
 508   if (argc != 1)
 509     error (_("-var-info-expression: Usage: NAME."));
 510
 511   /* Get varobj handle, if a valid var obj name was specified.  */
 512   var = varobj_get_handle (argv[0]);
 513
 514   lang = varobj_get_language (var);
 515
 516   ui_out_field_string (uiout, "lang", varobj_language_string[(int) lang]);
 517   ui_out_field_string (uiout, "exp", varobj_get_expression (var));
 518 }
 519
 520 void
 521 mi_cmd_var_show_attributes (char *command, char **argv, int argc)
 522 {
 523   struct ui_out *uiout = current_uiout;
 524   int attr;
 525   char *attstr;
 526   struct varobj *var;
 527
 528   if (argc != 1)
 529     error (_("-var-show-attributes: Usage: NAME."));
 530
 531   /* Get varobj handle, if a valid var obj name was specified */
 532   var = varobj_get_handle (argv[0]);
 533
 534   attr = varobj_get_attributes (var);
 535   /* FIXME: define masks for attributes */
 536   if (attr & 0x00000001)
 537     attstr = "editable";
 538   else
 539     attstr = "noneditable";
 540
 541   ui_out_field_string (uiout, "attr", attstr);
 542 }
 543
 544 void
 545 mi_cmd_var_evaluate_expression (char *command, char **argv, int argc)
 546 {
 547   struct ui_out *uiout = current_uiout;
 548   struct varobj *var;
 549
 550   enum varobj_display_formats format;
 551   int formatFound;
 552   int oind;
 553   char *oarg;
 554
 555   enum opt
 556   {
 557     OP_FORMAT
 558   };
 559   static const struct mi_opt opts[] =
 560     {
 561       {"f", OP_FORMAT, 1},
 562       { 0, 0, 0 }
 563     };
 564
 565   /* Parse arguments.  */
 566   format = FORMAT_NATURAL;
 567   formatFound = 0;
 568   oind = 0;
 569   while (1)
 570     {
 571       int opt = mi_getopt ("-var-evaluate-expression", argc, argv,
 572                            opts, &oind, &oarg);
 573
 574       if (opt < 0)
 575         break;
 576       switch ((enum opt) opt)
 577         {
 578         case OP_FORMAT:
 579           if (formatFound)
 580             error (_("Cannot specify format more than once"));
 581
 582           format = mi_parse_format (oarg);
 583           formatFound = 1;
 584           break;
 585         }
 586     }
 587
 588   if (oind >= argc)
 589     error (_("Usage: [-f FORMAT] NAME"));
 590
 591   if (oind < argc - 1)
 592     error (_("Garbage at end of command"));
 593
 594   /* Get varobj handle, if a valid var obj name was specified.  */
 595   var = varobj_get_handle (argv[oind]);
 596
 597   if (formatFound)
 598     {
 599       char *val = varobj_get_formatted_value (var, format);
 600
 601       ui_out_field_string (uiout, "value", val);
 602       xfree (val);
 603     }
 604   else
 605     {
 606       char *val = varobj_get_value (var);
 607
 608       ui_out_field_string (uiout, "value", val);
 609       xfree (val);
 610     }
 611 }
 612
 613 void
 614 mi_cmd_var_assign (char *command, char **argv, int argc)
 615 {
 616   struct ui_out *uiout = current_uiout;
 617   struct varobj *var;
 618   char *expression, *val;
 619   struct cleanup *cleanup;
 620
 621   if (argc != 2)
 622     error (_("-var-assign: Usage: NAME EXPRESSION."));
 623
 624   /* Get varobj handle, if a valid var obj name was specified.  */
 625   var = varobj_get_handle (argv[0]);
 626
 627   if (!varobj_editable_p (var))
 628     error (_("-var-assign: Variable object is not editable"));
 629
 630   expression = xstrdup (argv[1]);
 631
 632   /* MI command '-var-assign' may write memory, so suppress memory
 633      changed notification if it does.  */
 634   cleanup
 635     = make_cleanup_restore_integer (&mi_suppress_notification.memory);
 636   mi_suppress_notification.memory = 1;
 637
 638   if (!varobj_set_value (var, expression))
 639     error (_("-var-assign: Could not assign "
 640              "expression to variable object"));
 641
 642   val = varobj_get_value (var);
 643   ui_out_field_string (uiout, "value", val);
 644   xfree (val);
 645
 646   do_cleanups (cleanup);
 647 }
 648
 649 /* Type used for parameters passing to mi_cmd_var_update_iter.  */
 650
 651 struct mi_cmd_var_update
 652   {
 653     int only_floating;
 654     enum print_values print_values;
 655   };
 656
 657 /* Helper for mi_cmd_var_update - update each VAR.  */
 658
 659 static void
 660 mi_cmd_var_update_iter (struct varobj *var, void *data_pointer)
 661 {
 662   struct mi_cmd_var_update *data = data_pointer;
 663   int thread_id, thread_stopped;
 664
 665   thread_id = varobj_get_thread_id (var);
 666
 667   if (thread_id == -1 && is_stopped (inferior_ptid))
 668     thread_stopped = 1;
 669   else
 670     {
 671       struct thread_info *tp = find_thread_id (thread_id);
 672
 673       if (tp)
 674         thread_stopped = is_stopped (tp->ptid);
 675       else
 676         thread_stopped = 1;
 677     }
 678
 679   if (thread_stopped
 680       && (!data->only_floating || varobj_floating_p (var)))
 681     varobj_update_one (var, data->print_values, 0 /* implicit */);
 682 }
 683
 684 void
 685 mi_cmd_var_update (char *command, char **argv, int argc)
 686 {
 687   struct ui_out *uiout = current_uiout;
 688   struct cleanup *cleanup;
 689   char *name;
 690   enum print_values print_values;
 691
 692   if (argc != 1 && argc != 2)
 693     error (_("-var-update: Usage: [PRINT_VALUES] NAME."));
 694
 695   if (argc == 1)
 696     name = argv[0];
 697   else
 698     name = argv[1];
 699
 700   if (argc == 2)
 701     print_values = mi_parse_values_option (argv[0]);
 702   else
 703     print_values = PRINT_NO_VALUES;
 704
 705   if (mi_version (uiout) <= 1)
 706     cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, "changelist");
 707   else
 708     cleanup = make_cleanup_ui_out_list_begin_end (uiout, "changelist");
 709
 710   /* Check if the parameter is a "*", which means that we want to
 711      update all variables.  */
 712
 713   if ((*name == '*' || *name == '@') && (*(name + 1) == '\0'))
 714     {
 715       struct mi_cmd_var_update data;
 716
 717       data.only_floating = (*name == '@');
 718       data.print_values = print_values;
 719
 720       /* varobj_update_one automatically updates all the children of
 721          VAROBJ.  Therefore update each VAROBJ only once by iterating
 722          only the root VAROBJs.  */
 723
 724       all_root_varobjs (mi_cmd_var_update_iter, &data);
 725     }
 726   else
 727     {
 728       /* Get varobj handle, if a valid var obj name was specified.  */
 729       struct varobj *var = varobj_get_handle (name);
 730
 731       varobj_update_one (var, print_values, 1 /* explicit */);
 732     }
 733
 734   do_cleanups (cleanup);
 735 }
 736
 737 /* Helper for mi_cmd_var_update().  */
 738
 739 static void
 740 varobj_update_one (struct varobj *var, enum print_values print_values,
 741                    int explicit)
 742 {
 743   struct ui_out *uiout = current_uiout;
 744   struct cleanup *cleanup = NULL;
 745   VEC (varobj_update_result) *changes;
 746   varobj_update_result *r;
 747   int i;
 748
 749   changes = varobj_update (&var, explicit);
 750
 751   for (i = 0; VEC_iterate (varobj_update_result, changes, i, r); ++i)
 752     {
 753       char *display_hint;
 754       int from, to;
 755
 756       if (mi_version (uiout) > 1)
 757         cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 758       ui_out_field_string (uiout, "name", varobj_get_objname (r->varobj));
 759
 760       switch (r->status)
 761         {
 762         case VAROBJ_IN_SCOPE:
 763           if (mi_print_value_p (r->varobj, print_values))
 764             {
 765               char *val = varobj_get_value (r->varobj);
 766
 767               ui_out_field_string (uiout, "value", val);
 768               xfree (val);
 769             }
 770           ui_out_field_string (uiout, "in_scope", "true");
 771           break;
 772         case VAROBJ_NOT_IN_SCOPE:
 773           ui_out_field_string (uiout, "in_scope", "false");
 774           break;
 775         case VAROBJ_INVALID:
 776           ui_out_field_string (uiout, "in_scope", "invalid");
 777           break;
 778         }
 779
 780       if (r->status != VAROBJ_INVALID)
 781         {
 782           if (r->type_changed)
 783             ui_out_field_string (uiout, "type_changed", "true");
 784           else
 785             ui_out_field_string (uiout, "type_changed", "false");
 786         }
 787
 788       if (r->type_changed)
 789         ui_out_field_string (uiout, "new_type", varobj_get_type (r->varobj));
 790
 791       if (r->type_changed || r->children_changed)
 792         ui_out_field_int (uiout, "new_num_children",
 793                           varobj_get_num_children (r->varobj));
 794
 795       display_hint = varobj_get_display_hint (r->varobj);
 796       if (display_hint)
 797         {
 798           ui_out_field_string (uiout, "displayhint", display_hint);
 799           xfree (display_hint);
 800         }
 801
 802       if (varobj_pretty_printed_p (r->varobj))
 803         ui_out_field_int (uiout, "dynamic", 1);
 804
 805       varobj_get_child_range (r->varobj, &from, &to);
 806       ui_out_field_int (uiout, "has_more",
 807                         varobj_has_more (r->varobj, to));
 808
 809       if (r->new)
 810         {
 811           int j;
 812           varobj_p child;
 813           struct cleanup *cleanup;
 814
 815           cleanup = make_cleanup_ui_out_list_begin_end (uiout, "new_children");
 816           for (j = 0; VEC_iterate (varobj_p, r->new, j, child); ++j)
 817             {
 818               struct cleanup *cleanup_child;
 819
 820               cleanup_child
 821                 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 822               print_varobj (child, print_values, 1 /* print_expression */);
 823               do_cleanups (cleanup_child);
 824             }
 825
 826           do_cleanups (cleanup);
 827           VEC_free (varobj_p, r->new);
 828           r->new = NULL;        /* Paranoia.  */
 829         }
 830
 831       if (mi_version (uiout) > 1)
 832         do_cleanups (cleanup);
 833     }
 834   VEC_free (varobj_update_result, changes);
 835 }
 836
 837 void
 838 mi_cmd_enable_pretty_printing (char *command, char **argv, int argc)
 839 {
 840   if (argc != 0)
 841     error (_("-enable-pretty-printing: no arguments allowed"));
 842
 843   varobj_enable_pretty_printing ();
 844 }
 845
 846 void
 847 mi_cmd_var_set_update_range (char *command, char **argv, int argc)
 848 {
 849   struct varobj *var;
 850   int from, to;
 851
 852   if (argc != 3)
 853     error (_("-var-set-update-range: Usage: VAROBJ FROM TO"));
 854
 855   var = varobj_get_handle (argv[0]);
 856   from = atoi (argv[1]);
 857   to = atoi (argv[2]);
 858
 859   varobj_set_child_range (var, from, to);
 860 }