gdb/mi/mi-cmd-stack.c

   1 /* MI Command Set - stack commands.
   2    Copyright (C) 2000, Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions.
   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
  29 #ifdef UI_OUT
  30 /* FIXME: these should go in some .h file but stack.c doesn't have a
  31    corresponding .h file. These wrappers will be obsolete anyway, once
  32    we pull the plug on the sanitization. */
  33 extern void select_frame_command_wrapper (char *, int);
  34 #endif
  35
  36 static void list_args_or_locals (int locals, int values, struct frame_info *fi);
  37
  38 /* Print a list of the stack frames. Args can be none, in which case
  39    we want to print the whole backtrace, or a pair of numbers
  40    specifying the frame numbers at which to start and stop the
  41    display. If the two numbers are equal, a single frame will be
  42    displayed. */
  43 enum mi_cmd_result
  44 mi_cmd_stack_list_frames (char *command, char **argv, int argc)
  45 {
  46   int frame_low;
  47   int frame_high;
  48   int i;
  49   struct frame_info *fi;
  50
  51   if (!target_has_stack)
  52     error ("mi_cmd_stack_list_frames: No stack.");
  53
  54   if (argc > 2 || argc == 1)
  55     error ("mi_cmd_stack_list_frames: Usage: [FRAME_LOW FRAME_HIGH]");
  56
  57   if (argc == 2)
  58     {
  59       frame_low = atoi (argv[0]);
  60       frame_high = atoi (argv[1]);
  61     }
  62   else
  63     {
  64       /* Called with no arguments, it means we want the whole
  65          backtrace. */
  66       frame_low = -1;
  67       frame_high = -1;
  68     }
  69
  70   /* Let's position fi on the frame at which to start the
  71      display. Could be the innermost frame if the whole stack needs
  72      displaying, or if frame_low is 0. */
  73   for (i = 0, fi = get_current_frame ();
  74        fi && i < frame_low;
  75        i++, fi = get_prev_frame (fi));
  76
  77   if (fi == NULL)
  78     error ("mi_cmd_stack_list_frames: Not enough frames in stack.");
  79
  80   ui_out_list_begin (uiout, "stack");
  81
  82   /* Now let;s print the frames up to frame_high, or until there are
  83      frames in the stack. */
  84   for (;
  85        fi && (i <= frame_high || frame_high == -1);
  86        i++, fi = get_prev_frame (fi))
  87     {
  88       QUIT;
  89       /* level == i: always print the level 'i'
  90          source == LOC_AND_ADDRESS: print the location and the address
  91          always, even for level 0.
  92          args == 0: don't print the arguments. */
  93       print_frame_info (fi /* frame info */ ,
  94                         i /* level */ ,
  95                         LOC_AND_ADDRESS /* source */ ,
  96                         0 /* args */ );
  97     }
  98
  99   ui_out_list_end (uiout);
 100   if (i < frame_high)
 101     error ("mi_cmd_stack_list_frames: Not enough frames in stack.");
 102
 103   return MI_CMD_DONE;
 104 }
 105
 106 enum mi_cmd_result
 107 mi_cmd_stack_info_depth (char *command, char **argv, int argc)
 108 {
 109   int frame_high;
 110   int i;
 111   struct frame_info *fi;
 112
 113   if (!target_has_stack)
 114     error ("mi_cmd_stack_info_depth: No stack.");
 115
 116   if (argc > 1)
 117     error ("mi_cmd_stack_info_depth: Usage: [MAX_DEPTH]");
 118
 119   if (argc == 1)
 120     frame_high = atoi (argv[0]);
 121   else
 122     /* Called with no arguments, it means we want the real depth of
 123        the stack. */
 124     frame_high = -1;
 125
 126   for (i = 0, fi = get_current_frame ();
 127        fi && (i < frame_high || frame_high == -1);
 128        i++, fi = get_prev_frame (fi))
 129     QUIT;
 130
 131   ui_out_field_int (uiout, "depth", i);
 132
 133   return MI_CMD_DONE;
 134 }
 135
 136 /* Print a list of the locals for the current frame. With argument of
 137    0, print only the names, with argument of 1 print also the
 138    values. */
 139 enum mi_cmd_result
 140 mi_cmd_stack_list_locals (char *command, char **argv, int argc)
 141 {
 142   if (argc != 1)
 143     error ("mi_cmd_stack_list_locals: Usage: PRINT_VALUES");
 144
 145   list_args_or_locals (1, atoi (argv[0]), selected_frame);
 146   return MI_CMD_DONE;
 147 }
 148
 149 /* Print a list of the arguments for the current frame. With argument
 150    of 0, print only the names, with argument of 1 print also the
 151    values. */
 152 enum mi_cmd_result
 153 mi_cmd_stack_list_args (char *command, char **argv, int argc)
 154 {
 155   int frame_low;
 156   int frame_high;
 157   int i;
 158   struct frame_info *fi;
 159
 160   if (argc < 1 || argc > 3 || argc == 2)
 161     error ("mi_cmd_stack_list_args: Usage: PRINT_VALUES [FRAME_LOW FRAME_HIGH]");
 162
 163   if (argc == 3)
 164     {
 165       frame_low = atoi (argv[1]);
 166       frame_high = atoi (argv[2]);
 167     }
 168   else
 169     {
 170       /* Called with no arguments, it means we want args for the whole
 171          backtrace. */
 172       frame_low = -1;
 173       frame_high = -1;
 174     }
 175
 176   /* Let's position fi on the frame at which to start the
 177      display. Could be the innermost frame if the whole stack needs
 178      displaying, or if frame_low is 0. */
 179   for (i = 0, fi = get_current_frame ();
 180        fi && i < frame_low;
 181        i++, fi = get_prev_frame (fi));
 182
 183   if (fi == NULL)
 184     error ("mi_cmd_stack_list_args: Not enough frames in stack.");
 185
 186   ui_out_list_begin (uiout, "stack-args");
 187
 188   /* Now let's print the frames up to frame_high, or until there are
 189      frames in the stack. */
 190   for (;
 191        fi && (i <= frame_high || frame_high == -1);
 192        i++, fi = get_prev_frame (fi))
 193     {
 194       QUIT;
 195       ui_out_list_begin (uiout, "frame");
 196       ui_out_field_int (uiout, "level", i);
 197       list_args_or_locals (0, atoi (argv[0]), fi);
 198       ui_out_list_end (uiout);
 199     }
 200
 201   ui_out_list_end (uiout);
 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   int i, nsyms;
 218   int print_me = 0;
 219   static struct ui_stream *stb = NULL;
 220
 221   stb = ui_out_stream_new (uiout);
 222
 223   block = get_frame_block (fi);
 224
 225   ui_out_list_begin (uiout, locals ? "locals" : "args");
 226
 227   while (block != 0)
 228     {
 229       nsyms = BLOCK_NSYMS (block);
 230       for (i = 0; i < nsyms; i++)
 231         {
 232           sym = BLOCK_SYM (block, i);
 233           switch (SYMBOL_CLASS (sym))
 234             {
 235             default:
 236             case LOC_UNDEF:     /* catches errors        */
 237             case LOC_CONST:     /* constant              */
 238             case LOC_TYPEDEF:   /* local typedef         */
 239             case LOC_LABEL:     /* local label           */
 240             case LOC_BLOCK:     /* local function        */
 241             case LOC_CONST_BYTES:       /* loc. byte seq.        */
 242             case LOC_UNRESOLVED:        /* unresolved static     */
 243             case LOC_OPTIMIZED_OUT:     /* optimized out         */
 244               print_me = 0;
 245               break;
 246
 247             case LOC_ARG:       /* argument              */
 248             case LOC_REF_ARG:   /* reference arg         */
 249             case LOC_REGPARM:   /* register arg          */
 250             case LOC_REGPARM_ADDR:      /* indirect register arg */
 251             case LOC_LOCAL_ARG: /* stack arg             */
 252             case LOC_BASEREG_ARG:       /* basereg arg           */
 253               if (!locals)
 254                 print_me = 1;
 255               break;
 256
 257             case LOC_LOCAL:     /* stack local           */
 258             case LOC_BASEREG:   /* basereg local         */
 259             case LOC_STATIC:    /* static                */
 260             case LOC_REGISTER:  /* register              */
 261               if (locals)
 262                 print_me = 1;
 263               break;
 264             }
 265           if (print_me)
 266             {
 267               if (values)
 268                 ui_out_list_begin (uiout, NULL);
 269               ui_out_field_string (uiout, "name", SYMBOL_NAME (sym));
 270
 271               if (values)
 272                 {
 273                   struct symbol *sym2;
 274                   if (!locals)
 275                     sym2 = lookup_symbol (SYMBOL_NAME (sym),
 276                                           block, VAR_NAMESPACE,
 277                                           (int *) NULL,
 278                                           (struct symtab **) NULL);
 279                   else
 280                     sym2 = sym;
 281                   print_variable_value (sym2, fi, stb->stream);
 282                   ui_out_field_stream (uiout, "value", stb);
 283                   ui_out_list_end (uiout);
 284                 }
 285             }
 286         }
 287       if (BLOCK_FUNCTION (block))
 288         break;
 289       else
 290         block = BLOCK_SUPERBLOCK (block);
 291     }
 292   ui_out_list_end (uiout);
 293   ui_out_stream_delete (stb);
 294 }
 295
 296 enum mi_cmd_result
 297 mi_cmd_stack_select_frame (char *command, char **argv, int argc)
 298 {
 299 #ifdef UI_OUT
 300   if (!target_has_stack)
 301     error ("mi_cmd_stack_select_frame: No stack.");
 302
 303   if (argc > 1)
 304     error ("mi_cmd_stack_select_frame: Usage: [FRAME_SPEC]");
 305
 306   /* with no args, don't change frame */
 307   if (argc == 0)
 308     select_frame_command_wrapper (0, 1 /* not used */ );
 309   else
 310     select_frame_command_wrapper (argv[0], 1 /* not used */ );
 311 #endif
 312   return MI_CMD_DONE;
 313 }
 314
 315 /* Local variables: */
 316 /* change-log-default-name: "ChangeLog-mi" */
 317 /* End: */