gdb/mi/mi-cmd-var.c

   1 /* MI Command Set - varobj commands.
   2
   3    Copyright (C) 2000, 2002, 2004, 2005, 2007, 2008, 2009
   4    Free Software Foundation, Inc.
   5
   6    Contributed by Cygnus Solutions (a Red Hat company).
   7
   8    This file is part of GDB.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  22
  23 #include "defs.h"
  24 #include "mi-cmds.h"
  25 #include "ui-out.h"
  26 #include "mi-out.h"
  27 #include "varobj.h"
  28 #include "value.h"
  29 #include <ctype.h>
  30 #include "gdb_string.h"
  31 #include "mi-getopt.h"
  32 #include "gdbthread.h"
  33
  34 const char mi_no_values[] = "--no-values";
  35 const char mi_simple_values[] = "--simple-values";
  36 const char mi_all_values[] = "--all-values";
  37
  38 extern int varobjdebug;         /* defined in varobj.c.  */
  39
  40 static void varobj_update_one (struct varobj *var,
  41                               enum print_values print_values,
  42                               int explicit);
  43
  44 static int mi_print_value_p (struct type *type, 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 static void
  50 print_varobj (struct varobj *var, enum print_values print_values,
  51               int print_expression)
  52 {
  53   struct type *gdb_type;
  54   char *type;
  55   int thread_id;
  56
  57   ui_out_field_string (uiout, "name", varobj_get_objname (var));
  58   if (print_expression)
  59     ui_out_field_string (uiout, "exp", varobj_get_expression (var));
  60   ui_out_field_int (uiout, "numchild", varobj_get_num_children (var));
  61
  62   if (mi_print_value_p (varobj_get_gdb_type (var), print_values))
  63     ui_out_field_string (uiout, "value", varobj_get_value (var));
  64
  65   type = varobj_get_type (var);
  66   if (type != NULL)
  67     {
  68       ui_out_field_string (uiout, "type", type);
  69       xfree (type);
  70     }
  71
  72   thread_id = varobj_get_thread_id (var);
  73   if (thread_id > 0)
  74     ui_out_field_int (uiout, "thread-id", thread_id);
  75
  76   if (varobj_get_frozen (var))
  77     ui_out_field_int (uiout, "frozen", 1);
  78 }
  79
  80 /* VAROBJ operations */
  81
  82 void
  83 mi_cmd_var_create (char *command, char **argv, int argc)
  84 {
  85   CORE_ADDR frameaddr = 0;
  86   struct varobj *var;
  87   char *name;
  88   char *frame;
  89   char *expr;
  90   struct cleanup *old_cleanups;
  91   enum varobj_type var_type;
  92
  93   if (argc != 3)
  94     {
  95       /* mi_error_message = xstrprintf ("mi_cmd_var_create: Usage:
  96          ...."); return MI_CMD_ERROR; */
  97       error (_("mi_cmd_var_create: Usage: NAME FRAME EXPRESSION."));
  98     }
  99
 100   name = xstrdup (argv[0]);
 101   /* Add cleanup for name. Must be free_current_contents as
 102      name can be reallocated */
 103   old_cleanups = make_cleanup (free_current_contents, &name);
 104
 105   frame = xstrdup (argv[1]);
 106   make_cleanup (xfree, frame);
 107
 108   expr = xstrdup (argv[2]);
 109   make_cleanup (xfree, expr);
 110
 111   if (strcmp (name, "-") == 0)
 112     {
 113       xfree (name);
 114       name = varobj_gen_name ();
 115     }
 116   else if (!isalpha (*name))
 117     error (_("mi_cmd_var_create: name of object must begin with a letter"));
 118
 119   if (strcmp (frame, "*") == 0)
 120     var_type = USE_CURRENT_FRAME;
 121   else if (strcmp (frame, "@") == 0)
 122     var_type = USE_SELECTED_FRAME;
 123   else
 124     {
 125       var_type = USE_SPECIFIED_FRAME;
 126       frameaddr = string_to_core_addr (frame);
 127     }
 128
 129   if (varobjdebug)
 130     fprintf_unfiltered (gdb_stdlog,
 131                     "Name=\"%s\", Frame=\"%s\" (0x%s), Expression=\"%s\"\n",
 132                         name, frame, paddr (frameaddr), expr);
 133
 134   var = varobj_create (name, expr, frameaddr, var_type);
 135
 136   if (var == NULL)
 137     error (_("mi_cmd_var_create: unable to create variable object"));
 138
 139   print_varobj (var, PRINT_ALL_VALUES, 0 /* don't print expression */);
 140
 141   do_cleanups (old_cleanups);
 142 }
 143
 144 void
 145 mi_cmd_var_delete (char *command, char **argv, int argc)
 146 {
 147   char *name;
 148   struct varobj *var;
 149   int numdel;
 150   int children_only_p = 0;
 151   struct cleanup *old_cleanups;
 152
 153   if (argc < 1 || argc > 2)
 154     error (_("mi_cmd_var_delete: Usage: [-c] EXPRESSION."));
 155
 156   name = xstrdup (argv[0]);
 157   /* Add cleanup for name. Must be free_current_contents as
 158      name can be reallocated */
 159   old_cleanups = make_cleanup (free_current_contents, &name);
 160
 161   /* If we have one single argument it cannot be '-c' or any string
 162      starting with '-'. */
 163   if (argc == 1)
 164     {
 165       if (strcmp (name, "-c") == 0)
 166         error (_("mi_cmd_var_delete: Missing required argument after '-c': variable object name"));
 167       if (*name == '-')
 168         error (_("mi_cmd_var_delete: Illegal variable object name"));
 169     }
 170
 171   /* If we have 2 arguments they must be '-c' followed by a string
 172      which would be the variable name. */
 173   if (argc == 2)
 174     {
 175       if (strcmp (name, "-c") != 0)
 176         error (_("mi_cmd_var_delete: Invalid option."));
 177       children_only_p = 1;
 178       do_cleanups (old_cleanups);
 179       name = xstrdup (argv[1]);
 180       make_cleanup (free_current_contents, &name);
 181     }
 182
 183   /* If we didn't error out, now NAME contains the name of the
 184      variable. */
 185
 186   var = varobj_get_handle (name);
 187
 188   numdel = varobj_delete (var, NULL, children_only_p);
 189
 190   ui_out_field_int (uiout, "ndeleted", numdel);
 191
 192   do_cleanups (old_cleanups);
 193 }
 194
 195 /* Parse a string argument into a format value.  */
 196
 197 static enum varobj_display_formats
 198 mi_parse_format (const char *arg)
 199 {
 200   if (arg != NULL)
 201     {
 202       int len;
 203
 204       len = strlen (arg);
 205
 206       if (strncmp (arg, "natural", len) == 0)
 207         return FORMAT_NATURAL;
 208       else if (strncmp (arg, "binary", len) == 0)
 209         return FORMAT_BINARY;
 210       else if (strncmp (arg, "decimal", len) == 0)
 211         return FORMAT_DECIMAL;
 212       else if (strncmp (arg, "hexadecimal", len) == 0)
 213         return FORMAT_HEXADECIMAL;
 214       else if (strncmp (arg, "octal", len) == 0)
 215         return FORMAT_OCTAL;
 216     }
 217
 218   error (_("Must specify the format as: \"natural\", \"binary\", \"decimal\", \"hexadecimal\", or \"octal\""));
 219 }
 220
 221 void
 222 mi_cmd_var_set_format (char *command, char **argv, int argc)
 223 {
 224   enum varobj_display_formats format;
 225   struct varobj *var;
 226
 227   if (argc != 2)
 228     error (_("mi_cmd_var_set_format: Usage: NAME FORMAT."));
 229
 230   /* Get varobj handle, if a valid var obj name was specified */
 231   var = varobj_get_handle (argv[0]);
 232
 233   format = mi_parse_format (argv[1]);
 234
 235   /* Set the format of VAR to given format */
 236   varobj_set_display_format (var, format);
 237
 238   /* Report the new current format */
 239   ui_out_field_string (uiout, "format", varobj_format_string[(int) format]);
 240
 241   /* Report the value in the new format */
 242   ui_out_field_string (uiout, "value", varobj_get_value (var));
 243 }
 244
 245 void
 246 mi_cmd_var_set_frozen (char *command, char **argv, int argc)
 247 {
 248   struct varobj *var;
 249   int frozen;
 250
 251   if (argc != 2)
 252     error (_("-var-set-format: Usage: NAME FROZEN_FLAG."));
 253
 254   var = varobj_get_handle (argv[0]);
 255
 256   if (strcmp (argv[1], "0") == 0)
 257     frozen = 0;
 258   else if (strcmp (argv[1], "1") == 0)
 259     frozen = 1;
 260   else
 261     error (_("Invalid flag value"));
 262
 263   varobj_set_frozen (var, frozen);
 264
 265   /* We don't automatically return the new value, or what varobjs got new
 266      values during unfreezing.  If this information is required, client
 267      should call -var-update explicitly.  */
 268 }
 269
 270
 271 void
 272 mi_cmd_var_show_format (char *command, char **argv, int argc)
 273 {
 274   enum varobj_display_formats format;
 275   struct varobj *var;
 276
 277   if (argc != 1)
 278     error (_("mi_cmd_var_show_format: Usage: NAME."));
 279
 280   /* Get varobj handle, if a valid var obj name was specified */
 281   var = varobj_get_handle (argv[0]);
 282
 283   format = varobj_get_display_format (var);
 284
 285   /* Report the current format */
 286   ui_out_field_string (uiout, "format", varobj_format_string[(int) format]);
 287 }
 288
 289 void
 290 mi_cmd_var_info_num_children (char *command, char **argv, int argc)
 291 {
 292   struct varobj *var;
 293
 294   if (argc != 1)
 295     error (_("mi_cmd_var_info_num_children: Usage: NAME."));
 296
 297   /* Get varobj handle, if a valid var obj name was specified */
 298   var = varobj_get_handle (argv[0]);
 299
 300   ui_out_field_int (uiout, "numchild", varobj_get_num_children (var));
 301 }
 302
 303 /* Parse a string argument into a print_values value.  */
 304
 305 static enum print_values
 306 mi_parse_values_option (const char *arg)
 307 {
 308   if (strcmp (arg, "0") == 0
 309       || strcmp (arg, mi_no_values) == 0)
 310     return PRINT_NO_VALUES;
 311   else if (strcmp (arg, "1") == 0
 312            || strcmp (arg, mi_all_values) == 0)
 313     return PRINT_ALL_VALUES;
 314   else if (strcmp (arg, "2") == 0
 315            || strcmp (arg, mi_simple_values) == 0)
 316     return PRINT_SIMPLE_VALUES;
 317   else
 318     error (_("Unknown value for PRINT_VALUES\n\
 319 Must be: 0 or \"%s\", 1 or \"%s\", 2 or \"%s\""),
 320            mi_no_values, mi_simple_values, mi_all_values);
 321 }
 322
 323 /* Return 1 if given the argument PRINT_VALUES we should display
 324    a value of type TYPE.  */
 325
 326 static int
 327 mi_print_value_p (struct type *type, enum print_values print_values)
 328 {
 329
 330   if (print_values == PRINT_NO_VALUES)
 331     return 0;
 332
 333   if (print_values == PRINT_ALL_VALUES)
 334     return 1;
 335
 336   if (type == NULL)
 337     return 1;
 338   else
 339     {
 340       type = check_typedef (type);
 341
 342       /* For PRINT_SIMPLE_VALUES, only print the value if it has a type
 343          and that type is not a compound type.  */
 344       return (TYPE_CODE (type) != TYPE_CODE_ARRAY
 345               && TYPE_CODE (type) != TYPE_CODE_STRUCT
 346               && TYPE_CODE (type) != TYPE_CODE_UNION);
 347     }
 348 }
 349
 350 void
 351 mi_cmd_var_list_children (char *command, char **argv, int argc)
 352 {
 353   struct varobj *var;
 354   VEC(varobj_p) *children;
 355   struct varobj *child;
 356   struct cleanup *cleanup_children;
 357   int numchild;
 358   enum print_values print_values;
 359   int ix;
 360
 361   if (argc != 1 && argc != 2)
 362     error (_("mi_cmd_var_list_children: Usage: [PRINT_VALUES] NAME"));
 363
 364   /* Get varobj handle, if a valid var obj name was specified */
 365   if (argc == 1)
 366     var = varobj_get_handle (argv[0]);
 367   else
 368     var = varobj_get_handle (argv[1]);
 369
 370   children = varobj_list_children (var);
 371   ui_out_field_int (uiout, "numchild", VEC_length (varobj_p, children));
 372   if (argc == 2)
 373     print_values = mi_parse_values_option (argv[0]);
 374   else
 375     print_values = PRINT_NO_VALUES;
 376
 377   if (VEC_length (varobj_p, children) == 0)
 378     return;
 379
 380   if (mi_version (uiout) == 1)
 381     cleanup_children = make_cleanup_ui_out_tuple_begin_end (uiout, "children");
 382   else
 383     cleanup_children = make_cleanup_ui_out_list_begin_end (uiout, "children");
 384   for (ix = 0; VEC_iterate (varobj_p, children, ix, child); ++ix)
 385     {
 386       struct cleanup *cleanup_child;
 387       cleanup_child = make_cleanup_ui_out_tuple_begin_end (uiout, "child");
 388       print_varobj (child, print_values, 1 /* print expression */);
 389       do_cleanups (cleanup_child);
 390     }
 391   do_cleanups (cleanup_children);
 392 }
 393
 394 void
 395 mi_cmd_var_info_type (char *command, char **argv, int argc)
 396 {
 397   struct varobj *var;
 398
 399   if (argc != 1)
 400     error (_("mi_cmd_var_info_type: Usage: NAME."));
 401
 402   /* Get varobj handle, if a valid var obj name was specified */
 403   var = varobj_get_handle (argv[0]);
 404
 405   ui_out_field_string (uiout, "type", varobj_get_type (var));
 406 }
 407
 408 void
 409 mi_cmd_var_info_path_expression (char *command, char **argv, int argc)
 410 {
 411   struct varobj *var;
 412   char *path_expr;
 413
 414   if (argc != 1)
 415     error (_("Usage: NAME."));
 416
 417   /* Get varobj handle, if a valid var obj name was specified.  */
 418   var = varobj_get_handle (argv[0]);
 419
 420   path_expr = varobj_get_path_expr (var);
 421
 422   ui_out_field_string (uiout, "path_expr", path_expr);
 423 }
 424
 425 void
 426 mi_cmd_var_info_expression (char *command, char **argv, int argc)
 427 {
 428   enum varobj_languages lang;
 429   struct varobj *var;
 430
 431   if (argc != 1)
 432     error (_("mi_cmd_var_info_expression: Usage: NAME."));
 433
 434   /* Get varobj handle, if a valid var obj name was specified */
 435   var = varobj_get_handle (argv[0]);
 436
 437   lang = varobj_get_language (var);
 438
 439   ui_out_field_string (uiout, "lang", varobj_language_string[(int) lang]);
 440   ui_out_field_string (uiout, "exp", varobj_get_expression (var));
 441 }
 442
 443 void
 444 mi_cmd_var_show_attributes (char *command, char **argv, int argc)
 445 {
 446   int attr;
 447   char *attstr;
 448   struct varobj *var;
 449
 450   if (argc != 1)
 451     error (_("mi_cmd_var_show_attributes: Usage: NAME."));
 452
 453   /* Get varobj handle, if a valid var obj name was specified */
 454   var = varobj_get_handle (argv[0]);
 455
 456   attr = varobj_get_attributes (var);
 457   /* FIXME: define masks for attributes */
 458   if (attr & 0x00000001)
 459     attstr = "editable";
 460   else
 461     attstr = "noneditable";
 462
 463   ui_out_field_string (uiout, "attr", attstr);
 464 }
 465
 466 void
 467 mi_cmd_var_evaluate_expression (char *command, char **argv, int argc)
 468 {
 469   struct varobj *var;
 470
 471   enum varobj_display_formats format;
 472   int formatFound;
 473   int optind;
 474   char *optarg;
 475
 476   enum opt
 477     {
 478       OP_FORMAT
 479     };
 480   static struct mi_opt opts[] =
 481   {
 482     {"f", OP_FORMAT, 1},
 483     { 0, 0, 0 }
 484   };
 485
 486   /* Parse arguments */
 487   format = FORMAT_NATURAL;
 488   formatFound = 0;
 489   optind = 0;
 490   while (1)
 491     {
 492       int opt = mi_getopt ("-var-evaluate-expression", argc, argv, opts, &optind, &optarg);
 493       if (opt < 0)
 494         break;
 495       switch ((enum opt) opt)
 496       {
 497         case OP_FORMAT:
 498           if (formatFound)
 499             error (_("Cannot specify format more than once"));
 500
 501           format = mi_parse_format (optarg);
 502           formatFound = 1;
 503           break;
 504       }
 505     }
 506
 507   if (optind >= argc)
 508     error (_("Usage: [-f FORMAT] NAME"));
 509
 510   if (optind < argc - 1)
 511     error (_("Garbage at end of command"));
 512
 513      /* Get varobj handle, if a valid var obj name was specified */
 514   var = varobj_get_handle (argv[optind]);
 515
 516   if (formatFound)
 517     ui_out_field_string (uiout, "value", varobj_get_formatted_value (var, format));
 518   else
 519     ui_out_field_string (uiout, "value", varobj_get_value (var));
 520 }
 521
 522 void
 523 mi_cmd_var_assign (char *command, char **argv, int argc)
 524 {
 525   struct varobj *var;
 526   char *expression;
 527
 528   if (argc != 2)
 529     error (_("mi_cmd_var_assign: Usage: NAME EXPRESSION."));
 530
 531   /* Get varobj handle, if a valid var obj name was specified */
 532   var = varobj_get_handle (argv[0]);
 533
 534   if (!varobj_editable_p (var))
 535     error (_("mi_cmd_var_assign: Variable object is not editable"));
 536
 537   expression = xstrdup (argv[1]);
 538
 539   if (!varobj_set_value (var, expression))
 540     error (_("mi_cmd_var_assign: Could not assign expression to variable object"));
 541
 542   ui_out_field_string (uiout, "value", varobj_get_value (var));
 543 }
 544
 545 void
 546 mi_cmd_var_update (char *command, char **argv, int argc)
 547 {
 548   struct varobj *var;
 549   struct varobj **rootlist;
 550   struct varobj **cr;
 551   struct cleanup *cleanup;
 552   char *name;
 553   int nv;
 554   enum print_values print_values;
 555
 556   if (argc != 1 && argc != 2)
 557     error (_("mi_cmd_var_update: Usage: [PRINT_VALUES] NAME."));
 558
 559   if (argc == 1)
 560     name = argv[0];
 561   else
 562     name = (argv[1]);
 563
 564   if (argc == 2)
 565     print_values = mi_parse_values_option (argv[0]);
 566   else
 567     print_values = PRINT_NO_VALUES;
 568
 569   /* Check if the parameter is a "*" which means that we want
 570      to update all variables */
 571
 572   if ((*name == '*' || *name == '@') && (*(name + 1) == '\0'))
 573     {
 574       nv = varobj_list (&rootlist);
 575       cleanup = make_cleanup (xfree, rootlist);
 576       if (mi_version (uiout) <= 1)
 577         make_cleanup_ui_out_tuple_begin_end (uiout, "changelist");
 578       else
 579         make_cleanup_ui_out_list_begin_end (uiout, "changelist");
 580       if (nv <= 0)
 581         {
 582           do_cleanups (cleanup);
 583           return;
 584         }
 585       cr = rootlist;
 586       while (*cr != NULL)
 587         {
 588           int thread_id = varobj_get_thread_id (*cr);
 589           int thread_stopped = 0;
 590           if (thread_id == -1 && is_stopped (inferior_ptid))
 591             thread_stopped = 1;
 592           else
 593             {
 594               struct thread_info *tp = find_thread_id (thread_id);
 595               if (tp)
 596                 thread_stopped = is_stopped (tp->ptid);
 597               else
 598                 thread_stopped = 1;
 599             }
 600           if (thread_stopped)
 601             if (*name == '*' || varobj_floating_p (*cr))
 602               varobj_update_one (*cr, print_values, 0 /* implicit */);
 603           cr++;
 604         }
 605       do_cleanups (cleanup);
 606     }
 607   else
 608     {
 609       /* Get varobj handle, if a valid var obj name was specified */
 610       var = varobj_get_handle (name);
 611
 612       if (mi_version (uiout) <= 1)
 613         cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, "changelist");
 614       else
 615         cleanup = make_cleanup_ui_out_list_begin_end (uiout, "changelist");
 616       varobj_update_one (var, print_values, 1 /* explicit */);
 617       do_cleanups (cleanup);
 618     }
 619 }
 620
 621 /* Helper for mi_cmd_var_update().  */
 622
 623 static void
 624 varobj_update_one (struct varobj *var, enum print_values print_values,
 625                    int explicit)
 626 {
 627   struct varobj **cc;
 628   struct cleanup *cleanup = NULL;
 629   VEC (varobj_update_result) *changes;
 630   varobj_update_result *r;
 631   int i;
 632
 633   changes = varobj_update (&var, explicit);
 634
 635   for (i = 0; VEC_iterate (varobj_update_result, changes, i, r); ++i)
 636     {
 637       if (mi_version (uiout) > 1)
 638         cleanup = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 639       ui_out_field_string (uiout, "name", varobj_get_objname (r->varobj));
 640
 641       switch (r->status)
 642         {
 643         case VAROBJ_IN_SCOPE:
 644           if (mi_print_value_p (varobj_get_gdb_type (r->varobj), print_values))
 645             ui_out_field_string (uiout, "value", varobj_get_value (r->varobj));
 646           ui_out_field_string (uiout, "in_scope", "true");
 647           break;
 648         case VAROBJ_NOT_IN_SCOPE:
 649           ui_out_field_string (uiout, "in_scope", "false");
 650           break;
 651         case VAROBJ_INVALID:
 652           ui_out_field_string (uiout, "in_scope", "invalid");
 653           break;
 654         }
 655
 656       if (r->status != VAROBJ_INVALID)
 657         {
 658           if (r->type_changed)
 659             ui_out_field_string (uiout, "type_changed", "true");
 660           else
 661             ui_out_field_string (uiout, "type_changed", "false");
 662         }
 663
 664       if (r->type_changed)
 665         {
 666           ui_out_field_string (uiout, "new_type", varobj_get_type (r->varobj));
 667           ui_out_field_int (uiout, "new_num_children",
 668                             varobj_get_num_children (r->varobj));
 669         }
 670
 671       if (mi_version (uiout) > 1)
 672         do_cleanups (cleanup);
 673     }
 674   VEC_free (varobj_update_result, changes);
 675 }