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
  33 static void list_args_or_locals (int locals, int values, struct frame_info *fi);
  34
  35 /* Print a list of the stack frames. Args can be none, in which case
  36    we want to print the whole backtrace, or a pair of numbers
  37    specifying the frame numbers at which to start and stop the
  38    display. If the two numbers are equal, a single frame will be
  39    displayed. */
  40 enum mi_cmd_result
  41 mi_cmd_stack_list_frames (char *command, char **argv, int argc)
  42 {
  43   int frame_low;
  44   int frame_high;
  45   int i;
  46   struct cleanup *cleanup_stack;
  47   struct frame_info *fi;
  48
  49   if (!target_has_stack)
  50     error ("mi_cmd_stack_list_frames: No stack.");
  51
  52   if (argc > 2 || argc == 1)
  53     error ("mi_cmd_stack_list_frames: Usage: [FRAME_LOW FRAME_HIGH]");
  54
  55   if (argc == 2)
  56     {
  57       frame_low = atoi (argv[0]);
  58       frame_high = atoi (argv[1]);
  59     }
  60   else
  61     {
  62       /* Called with no arguments, it means we want the whole
  63          backtrace. */
  64       frame_low = -1;
  65       frame_high = -1;
  66     }
  67
  68   /* Let's position fi on the frame at which to start the
  69      display. Could be the innermost frame if the whole stack needs
  70      displaying, or if frame_low is 0. */
  71   for (i = 0, fi = get_current_frame ();
  72        fi && i < frame_low;
  73        i++, fi = get_prev_frame (fi));
  74
  75   if (fi == NULL)
  76     error ("mi_cmd_stack_list_frames: Not enough frames in stack.");
  77
  78   cleanup_stack = make_cleanup_ui_out_list_begin_end (uiout, "stack");
  79
  80   /* Now let;s print the frames up to frame_high, or until there are
  81      frames in the stack. */
  82   for (;
  83        fi && (i <= frame_high || frame_high == -1);
  84        i++, fi = get_prev_frame (fi))
  85     {
  86       QUIT;
  87       /* level == i: always print the level 'i'
  88          source == LOC_AND_ADDRESS: print the location and the address
  89          always, even for level 0.
  90          args == 0: don't print the arguments. */
  91       print_frame_info (fi /* frame info */ ,
  92                         i /* level */ ,
  93                         LOC_AND_ADDRESS /* source */ ,
  94                         0 /* args */ );
  95     }
  96
  97   do_cleanups (cleanup_stack);
  98   if (i < frame_high)
  99     error ("mi_cmd_stack_list_frames: Not enough frames in stack.");
 100
 101   return MI_CMD_DONE;
 102 }
 103
 104 enum mi_cmd_result
 105 mi_cmd_stack_info_depth (char *command, char **argv, int argc)
 106 {
 107   int frame_high;
 108   int i;
 109   struct frame_info *fi;
 110
 111   if (!target_has_stack)
 112     error ("mi_cmd_stack_info_depth: No stack.");
 113
 114   if (argc > 1)
 115     error ("mi_cmd_stack_info_depth: Usage: [MAX_DEPTH]");
 116
 117   if (argc == 1)
 118     frame_high = atoi (argv[0]);
 119   else
 120     /* Called with no arguments, it means we want the real depth of
 121        the stack. */
 122     frame_high = -1;
 123
 124   for (i = 0, fi = get_current_frame ();
 125        fi && (i < frame_high || frame_high == -1);
 126        i++, fi = get_prev_frame (fi))
 127     QUIT;
 128
 129   ui_out_field_int (uiout, "depth", i);
 130
 131   return MI_CMD_DONE;
 132 }
 133
 134 /* Print a list of the locals for the current frame. With argument of
 135    0, print only the names, with argument of 1 print also the
 136    values. */
 137 enum mi_cmd_result
 138 mi_cmd_stack_list_locals (char *command, char **argv, int argc)
 139 {
 140   if (argc != 1)
 141     error ("mi_cmd_stack_list_locals: Usage: PRINT_VALUES");
 142
 143   list_args_or_locals (1, atoi (argv[0]), deprecated_selected_frame);
 144   return MI_CMD_DONE;
 145 }
 146
 147 /* Print a list of the arguments for the current frame. With argument
 148    of 0, print only the names, with argument of 1 print also the
 149    values. */
 150 enum mi_cmd_result
 151 mi_cmd_stack_list_args (char *command, char **argv, int argc)
 152 {
 153   int frame_low;
 154   int frame_high;
 155   int i;
 156   struct frame_info *fi;
 157   struct cleanup *cleanup_stack_args;
 158
 159   if (argc < 1 || argc > 3 || argc == 2)
 160     error ("mi_cmd_stack_list_args: Usage: PRINT_VALUES [FRAME_LOW FRAME_HIGH]");
 161
 162   if (argc == 3)
 163     {
 164       frame_low = atoi (argv[1]);
 165       frame_high = atoi (argv[2]);
 166     }
 167   else
 168     {
 169       /* Called with no arguments, it means we want args for the whole
 170          backtrace. */
 171       frame_low = -1;
 172       frame_high = -1;
 173     }
 174
 175   /* Let's position fi on the frame at which to start the
 176      display. Could be the innermost frame if the whole stack needs
 177      displaying, or if frame_low is 0. */
 178   for (i = 0, fi = get_current_frame ();
 179        fi && i < frame_low;
 180        i++, fi = get_prev_frame (fi));
 181
 182   if (fi == NULL)
 183     error ("mi_cmd_stack_list_args: Not enough frames in stack.");
 184
 185   cleanup_stack_args = make_cleanup_ui_out_list_begin_end (uiout, "stack-args");
 186
 187   /* Now let's print the frames up to frame_high, or until there are
 188      frames in the stack. */
 189   for (;
 190        fi && (i <= frame_high || frame_high == -1);
 191        i++, fi = get_prev_frame (fi))
 192     {
 193       struct cleanup *cleanup_frame;
 194       QUIT;
 195       cleanup_frame = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
 196       ui_out_field_int (uiout, "level", i);
 197       list_args_or_locals (0, atoi (argv[0]), fi);
 198       do_cleanups (cleanup_frame);
 199     }
 200
 201   do_cleanups (cleanup_stack_args);
 202   if (i < frame_high)
 203     error ("mi_cmd_stack_list_args: Not enough frames in stack.");
 204
 205   return MI_CMD_DONE;
 206 }
 207
 208 /* Print a list of the locals or the arguments for the currently
 209    selected frame.  If the argument passed is 0, printonly the names
 210    of the variables, if an argument of 1 is passed, print the values
 211    as well. */
 212 static void
 213 list_args_or_locals (int locals, int values, struct frame_info *fi)
 214 {
 215   struct block *block;
 216   struct symbol *sym;
 217   struct dict_iterator iter;
 218   int nsyms;
 219   struct cleanup *cleanup_list;
 220   static struct ui_stream *stb = NULL;
 221
 222   stb = ui_out_stream_new (uiout);
 223
 224   block = get_frame_block (fi, 0);
 225
 226   cleanup_list = make_cleanup_ui_out_list_begin_end (uiout, locals ? "locals" : "args");
 227
 228   while (block != 0)
 229     {
 230       ALL_BLOCK_SYMBOLS (block, iter, sym)
 231         {
 232           int print_me = 0;
 233
 234           switch (SYMBOL_CLASS (sym))
 235             {
 236             default:
 237             case LOC_UNDEF:     /* catches errors        */
 238             case LOC_CONST:     /* constant              */
 239             case LOC_TYPEDEF:   /* local typedef         */
 240             case LOC_LABEL:     /* local label           */
 241             case LOC_BLOCK:     /* local function        */
 242             case LOC_CONST_BYTES:       /* loc. byte seq.        */
 243             case LOC_UNRESOLVED:        /* unresolved static     */
 244             case LOC_OPTIMIZED_OUT:     /* optimized out         */
 245               print_me = 0;
 246               break;
 247
 248             case LOC_ARG:       /* argument              */
 249             case LOC_REF_ARG:   /* reference arg         */
 250             case LOC_REGPARM:   /* register arg          */
 251             case LOC_REGPARM_ADDR:      /* indirect register arg */
 252             case LOC_LOCAL_ARG: /* stack arg             */
 253             case LOC_BASEREG_ARG:       /* basereg arg           */
 254             case LOC_COMPUTED_ARG:      /* arg with computed location */
 255               if (!locals)
 256                 print_me = 1;
 257               break;
 258
 259             case LOC_LOCAL:     /* stack local           */
 260             case LOC_BASEREG:   /* basereg local         */
 261             case LOC_STATIC:    /* static                */
 262             case LOC_REGISTER:  /* register              */
 263             case LOC_COMPUTED:  /* computed location     */
 264               if (locals)
 265                 print_me = 1;
 266               break;
 267             }
 268           if (print_me)
 269             {
 270               struct cleanup *cleanup_tuple = NULL;
 271               if (values)
 272                 cleanup_tuple =
 273                   make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 274               ui_out_field_string (uiout, "name", DEPRECATED_SYMBOL_NAME (sym));
 275
 276               if (values)
 277                 {
 278                   struct symbol *sym2;
 279                   if (!locals)
 280                     sym2 = lookup_symbol (DEPRECATED_SYMBOL_NAME (sym),
 281                                           block, VAR_DOMAIN,
 282                                           (int *) NULL,
 283                                           (struct symtab **) NULL);
 284                   else
 285                     sym2 = sym;
 286                   print_variable_value (sym2, fi, stb->stream);
 287                   ui_out_field_stream (uiout, "value", stb);
 288                   do_cleanups (cleanup_tuple);
 289                 }
 290             }
 291         }
 292       if (BLOCK_FUNCTION (block))
 293         break;
 294       else
 295         block = BLOCK_SUPERBLOCK (block);
 296     }
 297   do_cleanups (cleanup_list);
 298   ui_out_stream_delete (stb);
 299 }
 300
 301 enum mi_cmd_result
 302 mi_cmd_stack_select_frame (char *command, char **argv, int argc)
 303 {
 304   if (!target_has_stack)
 305     error ("mi_cmd_stack_select_frame: No stack.");
 306
 307   if (argc > 1)
 308     error ("mi_cmd_stack_select_frame: Usage: [FRAME_SPEC]");
 309
 310   /* with no args, don't change frame */
 311   if (argc == 0)
 312     select_frame_command (0, 1 /* not used */ );
 313   else
 314     select_frame_command (argv[0], 1 /* not used */ );
 315   return MI_CMD_DONE;
 316 }