gdb/mi/mi-cmd-var.c

   1 /* MI Command Set - varobj commands.
   2    Copyright (C) 2000-2015 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, NULL, 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     }
 237
 238   error (_("Must specify the format as: \"natural\", "
 239            "\"binary\", \"decimal\", \"hexadecimal\", or \"octal\""));
 240 }
 241
 242 void
 243 mi_cmd_var_set_format (char *command, char **argv, int argc)
 244 {
 245   enum varobj_display_formats format;
 246   struct varobj *var;
 247   char *val;
 248   struct ui_out *uiout = current_uiout;
 249
 250   if (argc != 2)
 251     error (_("-var-set-format: Usage: NAME FORMAT."));
 252
 253   /* Get varobj handle, if a valid var obj name was specified.  */
 254   var = varobj_get_handle (argv[0]);
 255
 256   format = mi_parse_format (argv[1]);
 257
 258   /* Set the format of VAR to the given format.  */
 259   varobj_set_display_format (var, format);
 260
 261   /* Report the new current format.  */
 262   ui_out_field_string (uiout, "format", varobj_format_string[(int) format]);
 263
 264   /* Report the value in the new format.  */
 265   val = varobj_get_value (var);
 266   ui_out_field_string (uiout, "value", val);
 267   xfree (val);
 268 }
 269
 270 void
 271 mi_cmd_var_set_visualizer (char *command, char **argv, int argc)
 272 {
 273   struct varobj *var;
 274
 275   if (argc != 2)
 276     error (_("Usage: NAME VISUALIZER_FUNCTION."));
 277
 278   var = varobj_get_handle (argv[0]);
 279
 280   if (var == NULL)
 281     error (_("Variable object not found"));
 282
 283   varobj_set_visualizer (var, argv[1]);
 284 }
 285
 286 void
 287 mi_cmd_var_set_frozen (char *command, char **argv, int argc)
 288 {
 289   struct varobj *var;
 290   int frozen;
 291
 292   if (argc != 2)
 293     error (_("-var-set-format: Usage: NAME FROZEN_FLAG."));
 294
 295   var = varobj_get_handle (argv[0]);
 296
 297   if (strcmp (argv[1], "0") == 0)
 298     frozen = 0;
 299   else if (strcmp (argv[1], "1") == 0)
 300     frozen = 1;
 301   else
 302     error (_("Invalid flag value"));
 303
 304   varobj_set_frozen (var, frozen);
 305
 306   /* We don't automatically return the new value, or what varobjs got
 307      new values during unfreezing.  If this information is required,
 308      client should call -var-update explicitly.  */
 309 }
 310
 311 void
 312 mi_cmd_var_show_format (char *command, char **argv, int argc)
 313 {
 314   struct ui_out *uiout = current_uiout;
 315   enum varobj_display_formats format;
 316   struct varobj *var;
 317
 318   if (argc != 1)
 319     error (_("-var-show-format: Usage: NAME."));
 320
 321   /* Get varobj handle, if a valid var obj name was specified.  */
 322   var = varobj_get_handle (argv[0]);
 323
 324   format = varobj_get_display_format (var);
 325
 326   /* Report the current format.  */
 327   ui_out_field_string (uiout, "format", varobj_format_string[(int) format]);
 328 }
 329
 330 void
 331 mi_cmd_var_info_num_children (char *command, char **argv, int argc)
 332 {
 333   struct ui_out *uiout = current_uiout;
 334   struct varobj *var;
 335
 336   if (argc != 1)
 337     error (_("-var-info-num-children: Usage: NAME."));
 338
 339   /* Get varobj handle, if a valid var obj name was specified.  */
 340   var = varobj_get_handle (argv[0]);
 341
 342   ui_out_field_int (uiout, "numchild", varobj_get_num_children (var));
 343 }
 344
 345 /* Return 1 if given the argument PRINT_VALUES we should display
 346    the varobj VAR.  */
 347
 348 static int
 349 mi_print_value_p (struct varobj *var, enum print_values print_values)
 350 {
 351   struct type *type;
 352
 353   if (print_values == PRINT_NO_VALUES)
 354     return 0;
 355
 356   if (print_values == PRINT_ALL_VALUES)
 357     return 1;
 358
 359   if (varobj_is_dynamic_p (var))
 360     return 1;
 361
 362   type = varobj_get_gdb_type (var);
 363   if (type == NULL)
 364     return 1;
 365   else
 366     {
 367       type = check_typedef (type);
 368
 369       /* For PRINT_SIMPLE_VALUES, only print the value if it has a type
 370          and that type is not a compound type.  */
 371       return (TYPE_CODE (type) != TYPE_CODE_ARRAY
 372               && TYPE_CODE (type) != TYPE_CODE_STRUCT
 373               && TYPE_CODE (type) != TYPE_CODE_UNION);
 374     }
 375 }
 376
 377 void
 378 mi_cmd_var_list_children (char *command, char **argv, int argc)
 379 {
 380   struct ui_out *uiout = current_uiout;
 381   struct varobj *var;
 382   VEC(varobj_p) *children;
 383   struct varobj *child;
 384   enum print_values print_values;
 385   int ix;
 386   int from, to;
 387   char *display_hint;
 388
 389   if (argc < 1 || argc > 4)
 390     error (_("-var-list-children: Usage: "
 391              "[PRINT_VALUES] NAME [FROM TO]"));
 392
 393   /* Get varobj handle, if a valid var obj name was specified.  */
 394   if (argc == 1 || argc == 3)
 395     var = varobj_get_handle (argv[0]);
 396   else
 397     var = varobj_get_handle (argv[1]);
 398
 399   if (argc > 2)
 400     {
 401       from = atoi (argv[argc - 2]);
 402       to = atoi (argv[argc - 1]);
 403     }
 404   else
 405     {
 406       from = -1;
 407       to = -1;
 408     }
 409
 410   children = varobj_list_children (var, &from, &to);
 411   ui_out_field_int (uiout, "numchild", to - from);
 412   if (argc == 2 || argc == 4)
 413     print_values = mi_parse_print_values (argv[0]);
 414   else
 415     print_values = PRINT_NO_VALUES;
 416
 417   display_hint = varobj_get_display_hint (var);
 418   if (display_hint)
 419     {
 420       ui_out_field_string (uiout, "displayhint", display_hint);
 421       xfree (display_hint);
 422     }
 423
 424   if (from < to)
 425     {
 426       struct cleanup *cleanup_children;
 427
 428       if (mi_version (uiout) == 1)
 429         cleanup_children
 430           = make_cleanup_ui_out_tuple_begin_end (uiout, "children");
 431       else
 432         cleanup_children
 433           = make_cleanup_ui_out_list_begin_end (uiout, "children");
 434       for (ix = from;
 435            ix < to && VEC_iterate (varobj_p, children, ix, child);
 436            ++ix)
 437         {
 438           struct cleanup *cleanup_child;
 439
 440           cleanup_child = make_cleanup_ui_out_tuple_begin_end (uiout, "child");
 441           print_varobj (child, print_values, 1 /* print expression */);
 442           do_cleanups (cleanup_child);
 443         }
 444       do_cleanups (cleanup_children);
 445     }
 446
 447   ui_out_field_int (uiout, "has_more", varobj_has_more (var, to));
 448 }
 449
 450 void
 451 mi_cmd_var_info_type (char *command, char **argv, int argc)
 452 {
 453   struct ui_out *uiout = current_uiout;
 454   struct varobj *var;
 455   char *type_name;
 456
 457   if (argc != 1)
 458     error (_("-var-info-type: Usage: NAME."));
 459
 460   /* Get varobj handle, if a valid var obj name was specified.  */
 461   var = varobj_get_handle (argv[0]);
 462   type_name = varobj_get_type (var);
 463
 464   ui_out_field_string (uiout, "type", type_name);
 465
 466   xfree (type_name);
 467 }
 468
 469 void
 470 mi_cmd_var_info_path_expression (char *command, char **argv, int argc)
 471 {
 472   struct ui_out *uiout = current_uiout;
 473   struct varobj *var;
 474   char *path_expr;
 475
 476   if (argc != 1)
 477     error (_("Usage: NAME."));
 478
 479   /* Get varobj handle, if a valid var obj name was specified.  */
 480   var = varobj_get_handle (argv[0]);
 481
 482   path_expr = varobj_get_path_expr (var);
 483
 484   ui_out_field_string (uiout, "path_expr", path_expr);
 485 }
 486
 487 void
 488 mi_cmd_var_info_expression (char *command, char **argv, int argc)
 489 {
 490   struct ui_out *uiout = current_uiout;
 491   const struct language_defn *lang;
 492   struct varobj *var;
 493   char *exp;
 494
 495   if (argc != 1)
 496     error (_("-var-info-expression: Usage: NAME."));
 497
 498   /* Get varobj handle, if a valid var obj name was specified.  */
 499   var = varobj_get_handle (argv[0]);
 500
 501   lang = varobj_get_language (var);
 502
 503   ui_out_field_string (uiout, "lang", lang->la_natural_name);
 504
 505   exp = varobj_get_expression (var);
 506   ui_out_field_string (uiout, "exp", exp);
 507   xfree (exp);
 508 }
 509
 510 void
 511 mi_cmd_var_show_attributes (char *command, char **argv, int argc)
 512 {
 513   struct ui_out *uiout = current_uiout;
 514   int attr;
 515   char *attstr;
 516   struct varobj *var;
 517
 518   if (argc != 1)
 519     error (_("-var-show-attributes: Usage: NAME."));
 520
 521   /* Get varobj handle, if a valid var obj name was specified */
 522   var = varobj_get_handle (argv[0]);
 523
 524   attr = varobj_get_attributes (var);
 525   /* FIXME: define masks for attributes */
 526   if (attr & 0x00000001)
 527     attstr = "editable";
 528   else
 529     attstr = "noneditable";
 530
 531   ui_out_field_string (uiout, "attr", attstr);
 532 }
 533
 534 void
 535 mi_cmd_var_evaluate_expression (char *command, char **argv, int argc)
 536 {
 537   struct ui_out *uiout = current_uiout;
 538   struct varobj *var;
 539
 540   enum varobj_display_formats format;
 541   int formatFound;
 542   int oind;
 543   char *oarg;
 544
 545   enum opt
 546   {
 547     OP_FORMAT
 548   };
 549   static const struct mi_opt opts[] =
 550     {
 551       {"f", OP_FORMAT, 1},
 552       { 0, 0, 0 }
 553     };
 554
 555   /* Parse arguments.  */
 556   format = FORMAT_NATURAL;
 557   formatFound = 0;
 558   oind = 0;
 559   while (1)
 560     {
 561       int opt = mi_getopt ("-var-evaluate-expression", argc, argv,
 562                            opts, &oind, &oarg);
 563
 564       if (opt < 0)
 565         break;
 566       switch ((enum opt) opt)
 567         {
 568         case OP_FORMAT:
 569           if (formatFound)
 570             error (_("Cannot specify format more than once"));
 571
 572           format = mi_parse_format (oarg);
 573           formatFound = 1;
 574           break;
 575         }
 576     }
 577
 578   if (oind >= argc)
 579     error (_("Usage: [-f FORMAT] NAME"));
 580
 581   if (oind < argc - 1)
 582     error (_("Garbage at end of command"));
 583
 584   /* Get varobj handle, if a valid var obj name was specified.  */
 585   var = varobj_get_handle (argv[oind]);
 586
 587   if (formatFound)
 588     {
 589       char *val = varobj_get_formatted_value (var, format);
 590
 591       ui_out_field_string (uiout, "value", val);
 592       xfree (val);
 593     }
 594   else
 595     {
 596       char *val = varobj_get_value (var);
 597
 598       ui_out_field_string (uiout, "value", val);
 599       xfree (val);
 600     }
 601 }
 602
 603 void
 604 mi_cmd_var_assign (char *command, char **argv, int argc)
 605 {
 606   struct ui_out *uiout = current_uiout;
 607   struct varobj *var;
 608   char *expression, *val;
 609   struct cleanup *cleanup;
 610
 611   if (argc != 2)
 612     error (_("-var-assign: Usage: NAME EXPRESSION."));
 613
 614   /* Get varobj handle, if a valid var obj name was specified.  */
 615   var = varobj_get_handle (argv[0]);
 616
 617   if (!varobj_editable_p (var))
 618     error (_("-var-assign: Variable object is not editable"));
 619
 620   expression = xstrdup (argv[1]);
 621
 622   /* MI command '-var-assign' may write memory, so suppress memory
 623      changed notification if it does.  */
 624   cleanup
 625     = make_cleanup_restore_integer (&mi_suppress_notification.memory);
 626   mi_suppress_notification.memory = 1;
 627
 628   if (!varobj_set_value (var, expression))
 629     error (_("-var-assign: Could not assign "
 630              "expression to variable object"));
 631
 632   val = varobj_get_value (var);
 633   ui_out_field_string (uiout, "value", val);
 634   xfree (val);
 635
 636   do_cleanups (cleanup);
 637 }
 638
 639 /* Type used for parameters passing to mi_cmd_var_update_iter.  */
 640
 641 struct mi_cmd_var_update
 642   {
 643     int only_floating;
 644     enum print_values print_values;
 645   };
 646
 647 /* Helper for mi_cmd_var_update - update each VAR.  */
 648
 649 static void
 650 mi_cmd_var_update_iter (struct varobj *var, void *data_pointer)
 651 {
 652   struct mi_cmd_var_update *data = (struct mi_cmd_var_update *) data_pointer;
 653   int thread_id, thread_stopped;
 654
 655   thread_id = varobj_get_thread_id (var);
 656
 657   if (thread_id == -1
 658       && (ptid_equal (inferior_ptid, null_ptid)
 659           || is_stopped (inferior_ptid)))
 660     thread_stopped = 1;
 661   else
 662     {
 663       struct thread_info *tp = find_thread_id (thread_id);
 664
 665       if (tp)
 666         thread_stopped = is_stopped (tp->ptid);
 667       else
 668         thread_stopped = 1;
 669     }
 670
 671   if (thread_stopped
 672       && (!data->only_floating || varobj_floating_p (var)))
 673     varobj_update_one (var, data->print_values, 0 /* implicit */);
 674 }
 675
 676 void
 677 mi_cmd_var_update (char *command, char **argv, int argc)
 678 {
 679   struct ui_out *uiout = current_uiout;
 680   struct cleanup *cleanup;
 681   char *name;
 682   enum print_values print_values;
 683
 684   if (argc != 1 && argc != 2)
 685     error (_("-var-update: Usage: [PRINT_VALUES] NAME."));
 686
 687   if (argc == 1)
 688     name = argv[0];
 689   else
 690     name = argv[1];
 691
 692   if (argc == 2)
 693     print_values = mi_parse_print_values (argv[0]);
 694   else
 695     print_values = PRINT_NO_VALUES;
 696
 697   if (mi_version (uiout) <= 1)
 698     cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, "changelist");
 699   else
 700     cleanup = make_cleanup_ui_out_list_begin_end (uiout, "changelist");
 701
 702   /* Check if the parameter is a "*", which means that we want to
 703      update all variables.  */
 704
 705   if ((*name == '*' || *name == '@') && (*(name + 1) == '\0'))
 706     {
 707       struct mi_cmd_var_update data;
 708
 709       data.only_floating = (*name == '@');
 710       data.print_values = print_values;
 711
 712       /* varobj_update_one automatically updates all the children of
 713          VAROBJ.  Therefore update each VAROBJ only once by iterating
 714          only the root VAROBJs.  */
 715
 716       all_root_varobjs (mi_cmd_var_update_iter, &data);
 717     }
 718   else
 719     {
 720       /* Get varobj handle, if a valid var obj name was specified.  */
 721       struct varobj *var = varobj_get_handle (name);
 722
 723       varobj_update_one (var, print_values, 1 /* explicit */);
 724     }
 725
 726   do_cleanups (cleanup);
 727 }
 728
 729 /* Helper for mi_cmd_var_update().  */
 730
 731 static void
 732 varobj_update_one (struct varobj *var, enum print_values print_values,
 733                    int is_explicit)
 734 {
 735   struct ui_out *uiout = current_uiout;
 736   VEC (varobj_update_result) *changes;
 737   varobj_update_result *r;
 738   int i;
 739
 740   changes = varobj_update (&var, is_explicit);
 741
 742   for (i = 0; VEC_iterate (varobj_update_result, changes, i, r); ++i)
 743     {
 744       char *display_hint;
 745       int from, to;
 746       struct cleanup *cleanup = make_cleanup (null_cleanup, NULL);
 747
 748       if (mi_version (uiout) > 1)
 749         make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 750       ui_out_field_string (uiout, "name", varobj_get_objname (r->varobj));
 751
 752       switch (r->status)
 753         {
 754         case VAROBJ_IN_SCOPE:
 755           if (mi_print_value_p (r->varobj, print_values))
 756             {
 757               char *val = varobj_get_value (r->varobj);
 758
 759               ui_out_field_string (uiout, "value", val);
 760               xfree (val);
 761             }
 762           ui_out_field_string (uiout, "in_scope", "true");
 763           break;
 764         case VAROBJ_NOT_IN_SCOPE:
 765           ui_out_field_string (uiout, "in_scope", "false");
 766           break;
 767         case VAROBJ_INVALID:
 768           ui_out_field_string (uiout, "in_scope", "invalid");
 769           break;
 770         }
 771
 772       if (r->status != VAROBJ_INVALID)
 773         {
 774           if (r->type_changed)
 775             ui_out_field_string (uiout, "type_changed", "true");
 776           else
 777             ui_out_field_string (uiout, "type_changed", "false");
 778         }
 779
 780       if (r->type_changed)
 781         {
 782           char *type_name = varobj_get_type (r->varobj);
 783
 784           ui_out_field_string (uiout, "new_type", type_name);
 785           xfree (type_name);
 786         }
 787
 788       if (r->type_changed || r->children_changed)
 789         ui_out_field_int (uiout, "new_num_children",
 790                           varobj_get_num_children (r->varobj));
 791
 792       display_hint = varobj_get_display_hint (r->varobj);
 793       if (display_hint)
 794         {
 795           ui_out_field_string (uiout, "displayhint", display_hint);
 796           xfree (display_hint);
 797         }
 798
 799       if (varobj_is_dynamic_p (r->varobj))
 800         ui_out_field_int (uiout, "dynamic", 1);
 801
 802       varobj_get_child_range (r->varobj, &from, &to);
 803       ui_out_field_int (uiout, "has_more",
 804                         varobj_has_more (r->varobj, to));
 805
 806       if (r->newobj)
 807         {
 808           int j;
 809           varobj_p child;
 810           struct cleanup *cleanup;
 811
 812           cleanup = make_cleanup_ui_out_list_begin_end (uiout, "new_children");
 813           for (j = 0; VEC_iterate (varobj_p, r->newobj, j, child); ++j)
 814             {
 815               struct cleanup *cleanup_child;
 816
 817               cleanup_child
 818                 = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 819               print_varobj (child, print_values, 1 /* print_expression */);
 820               do_cleanups (cleanup_child);
 821             }
 822
 823           do_cleanups (cleanup);
 824           VEC_free (varobj_p, r->newobj);
 825           r->newobj = NULL;     /* Paranoia.  */
 826         }
 827
 828       do_cleanups (cleanup);
 829     }
 830   VEC_free (varobj_update_result, changes);
 831 }
 832
 833 void
 834 mi_cmd_enable_pretty_printing (char *command, char **argv, int argc)
 835 {
 836   if (argc != 0)
 837     error (_("-enable-pretty-printing: no arguments allowed"));
 838
 839   varobj_enable_pretty_printing ();
 840 }
 841
 842 void
 843 mi_cmd_var_set_update_range (char *command, char **argv, int argc)
 844 {
 845   struct varobj *var;
 846   int from, to;
 847
 848   if (argc != 3)
 849     error (_("-var-set-update-range: Usage: VAROBJ FROM TO"));
 850
 851   var = varobj_get_handle (argv[0]);
 852   from = atoi (argv[1]);
 853   to = atoi (argv[2]);
 854
 855   varobj_set_child_range (var, from, to);
 856 }