gdb/mi/mi-cmd-stack.c

   1 /* MI Command Set - stack commands.
   2    Copyright 2000, 2002, 2003 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions (a Red Hat company).
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #include "defs.h"
  23 #include "target.h"
  24 #include "frame.h"
  25 #include "value.h"
  26 #include "mi-cmds.h"
  27 #include "ui-out.h"
  28 #include "symtab.h"
  29 #include "block.h"
  30 #include "stack.h"
  31 #include "dictionary.h"
  32 #include "gdb_string.h"
  33
  34 static void list_args_or_locals (int locals, int values, struct frame_info *fi);
  35
  36 /* Print a list of the stack frames. Args can be none, in which case
  37    we want to print the whole backtrace, or a pair of numbers
  38    specifying the frame numbers at which to start and stop the
  39    display. If the two numbers are equal, a single frame will be
  40    displayed. */
  41 enum mi_cmd_result
  42 mi_cmd_stack_list_frames (char *command, char **argv, int argc)
  43 {
  44   int frame_low;
  45   int frame_high;
  46   int i;
  47   struct cleanup *cleanup_stack;
  48   struct frame_info *fi;
  49
  50   if (!target_has_stack)
  51     error ("mi_cmd_stack_list_frames: No stack.");
  52
  53   if (argc > 2 || argc == 1)
  54     error ("mi_cmd_stack_list_frames: Usage: [FRAME_LOW FRAME_HIGH]");
  55
  56   if (argc == 2)
  57     {
  58       frame_low = atoi (argv[0]);
  59       frame_high = atoi (argv[1]);
  60     }
  61   else
  62     {
  63       /* Called with no arguments, it means we want the whole
  64          backtrace. */
  65       frame_low = -1;
  66       frame_high = -1;
  67     }
  68
  69   /* Let's position fi on the frame at which to start the
  70      display. Could be the innermost frame if the whole stack needs
  71      displaying, or if frame_low is 0. */
  72   for (i = 0, fi = get_current_frame ();
  73        fi && i < frame_low;
  74        i++, fi = get_prev_frame (fi));
  75
  76   if (fi == NULL)
  77     error ("mi_cmd_stack_list_frames: Not enough frames in stack.");
  78
  79   cleanup_stack = make_cleanup_ui_out_list_begin_end (uiout, "stack");
  80
  81   /* Now let;s print the frames up to frame_high, or until there are
  82      frames in the stack. */
  83   for (;
  84        fi && (i <= frame_high || frame_high == -1);
  85        i++, fi = get_prev_frame (fi))
  86     {
  87       QUIT;
  88       /* level == i: always print the level 'i'
  89          source == LOC_AND_ADDRESS: print the location and the address
  90          always, even for level 0.
  91          args == 0: don't print the arguments. */
  92       print_frame_info (fi /* frame info */ ,
  93                         i /* level */ ,
  94                         LOC_AND_ADDRESS /* source */ ,
  95                         0 /* args */ );
  96     }
  97
  98   do_cleanups (cleanup_stack);
  99   if (i < frame_high)
 100     error ("mi_cmd_stack_list_frames: Not enough frames in stack.");
 101
 102   return MI_CMD_DONE;
 103 }
 104
 105 enum mi_cmd_result
 106 mi_cmd_stack_info_depth (char *command, char **argv, int argc)
 107 {
 108   int frame_high;
 109   int i;
 110   struct frame_info *fi;
 111
 112   if (!target_has_stack)
 113     error ("mi_cmd_stack_info_depth: No stack.");
 114
 115   if (argc > 1)
 116     error ("mi_cmd_stack_info_depth: Usage: [MAX_DEPTH]");
 117
 118   if (argc == 1)
 119     frame_high = atoi (argv[0]);
 120   else
 121     /* Called with no arguments, it means we want the real depth of
 122        the stack. */
 123     frame_high = -1;
 124
 125   for (i = 0, fi = get_current_frame ();
 126        fi && (i < frame_high || frame_high == -1);
 127        i++, fi = get_prev_frame (fi))
 128     QUIT;
 129
 130   ui_out_field_int (uiout, "depth", i);
 131
 132   return MI_CMD_DONE;
 133 }
 134
 135 /* Print a list of the locals for the current frame. With argument of
 136    0, print only the names, with argument of 1 print also the
 137    values. */
 138 enum mi_cmd_result
 139 mi_cmd_stack_list_locals (char *command, char **argv, int argc)
 140 {
 141   struct frame_info *frame;
 142   enum print_values print_values;
 143
 144   if (argc != 1)
 145     error ("mi_cmd_stack_list_locals: Usage: PRINT_VALUES");
 146
 147    frame = get_selected_frame ();
 148
 149    if (strcmp (argv[0], "0") == 0
 150        || strcmp (argv[0], "--no-values") == 0)
 151      print_values = PRINT_NO_VALUES;
 152    else if (strcmp (argv[0], "1") == 0
 153             || strcmp (argv[0], "--all-values") == 0)
 154      print_values = PRINT_ALL_VALUES;
 155    else if (strcmp (argv[0], "2") == 0
 156             || strcmp (argv[0], "--simple-values") == 0)
 157      print_values = PRINT_SIMPLE_VALUES;
 158    else
 159      error ("Unknown value for PRINT_VALUES: must be: 0 or \"--no-values\", 1 or \"--all-values\", 2 or \"--simple-values\"");
 160   list_args_or_locals (1, print_values, frame);
 161   return MI_CMD_DONE;
 162 }
 163
 164 /* Print a list of the arguments for the current frame. With argument
 165    of 0, print only the names, with argument of 1 print also the
 166    values. */
 167 enum mi_cmd_result
 168 mi_cmd_stack_list_args (char *command, char **argv, int argc)
 169 {
 170   int frame_low;
 171   int frame_high;
 172   int i;
 173   struct frame_info *fi;
 174   struct cleanup *cleanup_stack_args;
 175
 176   if (argc < 1 || argc > 3 || argc == 2)
 177     error ("mi_cmd_stack_list_args: Usage: PRINT_VALUES [FRAME_LOW FRAME_HIGH]");
 178
 179   if (argc == 3)
 180     {
 181       frame_low = atoi (argv[1]);
 182       frame_high = atoi (argv[2]);
 183     }
 184   else
 185     {
 186       /* Called with no arguments, it means we want args for the whole
 187          backtrace. */
 188       frame_low = -1;
 189       frame_high = -1;
 190     }
 191
 192   /* Let's position fi on the frame at which to start the
 193      display. Could be the innermost frame if the whole stack needs
 194      displaying, or if frame_low is 0. */
 195   for (i = 0, fi = get_current_frame ();
 196        fi && i < frame_low;
 197        i++, fi = get_prev_frame (fi));
 198
 199   if (fi == NULL)
 200     error ("mi_cmd_stack_list_args: Not enough frames in stack.");
 201
 202   cleanup_stack_args = make_cleanup_ui_out_list_begin_end (uiout, "stack-args");
 203
 204   /* Now let's print the frames up to frame_high, or until there are
 205      frames in the stack. */
 206   for (;
 207        fi && (i <= frame_high || frame_high == -1);
 208        i++, fi = get_prev_frame (fi))
 209     {
 210       struct cleanup *cleanup_frame;
 211       QUIT;
 212       cleanup_frame = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
 213       ui_out_field_int (uiout, "level", i);
 214       list_args_or_locals (0, atoi (argv[0]), fi);
 215       do_cleanups (cleanup_frame);
 216     }
 217
 218   do_cleanups (cleanup_stack_args);
 219   if (i < frame_high)
 220     error ("mi_cmd_stack_list_args: Not enough frames in stack.");
 221
 222   return MI_CMD_DONE;
 223 }
 224
 225 /* Print a list of the locals or the arguments for the currently
 226    selected frame.  If the argument passed is 0, printonly the names
 227    of the variables, if an argument of 1 is passed, print the values
 228    as well. */
 229 static void
 230 list_args_or_locals (int locals, int values, struct frame_info *fi)
 231 {
 232   struct block *block;
 233   struct symbol *sym;
 234   struct dict_iterator iter;
 235   int nsyms;
 236   struct cleanup *cleanup_list;
 237   static struct ui_stream *stb = NULL;
 238   struct type *type;
 239
 240   stb = ui_out_stream_new (uiout);
 241
 242   block = get_frame_block (fi, 0);
 243
 244   cleanup_list = make_cleanup_ui_out_list_begin_end (uiout, locals ? "locals" : "args");
 245
 246   while (block != 0)
 247     {
 248       ALL_BLOCK_SYMBOLS (block, iter, sym)
 249         {
 250           int print_me = 0;
 251
 252           switch (SYMBOL_CLASS (sym))
 253             {
 254             default:
 255             case LOC_UNDEF:     /* catches errors        */
 256             case LOC_CONST:     /* constant              */
 257             case LOC_TYPEDEF:   /* local typedef         */
 258             case LOC_LABEL:     /* local label           */
 259             case LOC_BLOCK:     /* local function        */
 260             case LOC_CONST_BYTES:       /* loc. byte seq.        */
 261             case LOC_UNRESOLVED:        /* unresolved static     */
 262             case LOC_OPTIMIZED_OUT:     /* optimized out         */
 263               print_me = 0;
 264               break;
 265
 266             case LOC_ARG:       /* argument              */
 267             case LOC_REF_ARG:   /* reference arg         */
 268             case LOC_REGPARM:   /* register arg          */
 269             case LOC_REGPARM_ADDR:      /* indirect register arg */
 270             case LOC_LOCAL_ARG: /* stack arg             */
 271             case LOC_BASEREG_ARG:       /* basereg arg           */
 272             case LOC_COMPUTED_ARG:      /* arg with computed location */
 273               if (!locals)
 274                 print_me = 1;
 275               break;
 276
 277             case LOC_LOCAL:     /* stack local           */
 278             case LOC_BASEREG:   /* basereg local         */
 279             case LOC_STATIC:    /* static                */
 280             case LOC_REGISTER:  /* register              */
 281             case LOC_COMPUTED:  /* computed location     */
 282               if (locals)
 283                 print_me = 1;
 284               break;
 285             }
 286           if (print_me)
 287             {
 288               struct cleanup *cleanup_tuple = NULL;
 289               struct symbol *sym2;
 290               if (values != PRINT_NO_VALUES)
 291                 cleanup_tuple =
 292                   make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 293               ui_out_field_string (uiout, "name", SYMBOL_PRINT_NAME (sym));
 294
 295               if (!locals)
 296                 sym2 = lookup_symbol (SYMBOL_NATURAL_NAME (sym),
 297                                       block, VAR_DOMAIN,
 298                                       (int *) NULL,
 299                                       (struct symtab **) NULL);
 300               else
 301                     sym2 = sym;
 302               switch (values)
 303                 {
 304                 case PRINT_SIMPLE_VALUES:
 305                   type = check_typedef (sym2->type);
 306                   type_print (sym2->type, "", stb->stream, -1);
 307                   ui_out_field_stream (uiout, "type", stb);
 308                   if (TYPE_CODE (type) != TYPE_CODE_ARRAY
 309                       && TYPE_CODE (type) != TYPE_CODE_STRUCT
 310                       && TYPE_CODE (type) != TYPE_CODE_UNION)
 311                     {
 312                       print_variable_value (sym2, fi, stb->stream);
 313                       ui_out_field_stream (uiout, "value", stb);
 314                     }
 315                   do_cleanups (cleanup_tuple);
 316                   break;
 317                 case PRINT_ALL_VALUES:
 318                   print_variable_value (sym2, fi, stb->stream);
 319                   ui_out_field_stream (uiout, "value", stb);
 320                   do_cleanups (cleanup_tuple);
 321                   break;
 322                 }
 323             }
 324         }
 325       if (BLOCK_FUNCTION (block))
 326         break;
 327       else
 328         block = BLOCK_SUPERBLOCK (block);
 329     }
 330   do_cleanups (cleanup_list);
 331   ui_out_stream_delete (stb);
 332 }
 333
 334 enum mi_cmd_result
 335 mi_cmd_stack_select_frame (char *command, char **argv, int argc)
 336 {
 337   if (!target_has_stack)
 338     error ("mi_cmd_stack_select_frame: No stack.");
 339
 340   if (argc > 1)
 341     error ("mi_cmd_stack_select_frame: Usage: [FRAME_SPEC]");
 342
 343   /* with no args, don't change frame */
 344   if (argc == 0)
 345     select_frame_command (0, 1 /* not used */ );
 346   else
 347     select_frame_command (argv[0], 1 /* not used */ );
 348   return MI_CMD_DONE;
 349 }