gnu/dist/gdb6/gdb/mi/mi-cmd-stack.c

   1 /* MI Command Set - stack commands.
   2    Copyright (C) 2000, 2002, 2003, 2004, 2005 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., 51 Franklin Street, Fifth Floor,
  20    Boston, MA 02110-1301, 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 (argc > 2 || argc == 1)
  51     error (_("mi_cmd_stack_list_frames: Usage: [FRAME_LOW FRAME_HIGH]"));
  52
  53   if (argc == 2)
  54     {
  55       frame_low = atoi (argv[0]);
  56       frame_high = atoi (argv[1]);
  57     }
  58   else
  59     {
  60       /* Called with no arguments, it means we want the whole
  61          backtrace. */
  62       frame_low = -1;
  63       frame_high = -1;
  64     }
  65
  66   /* Let's position fi on the frame at which to start the
  67      display. Could be the innermost frame if the whole stack needs
  68      displaying, or if frame_low is 0. */
  69   for (i = 0, fi = get_current_frame ();
  70        fi && i < frame_low;
  71        i++, fi = get_prev_frame (fi));
  72
  73   if (fi == NULL)
  74     error (_("mi_cmd_stack_list_frames: Not enough frames in stack."));
  75
  76   cleanup_stack = make_cleanup_ui_out_list_begin_end (uiout, "stack");
  77
  78   /* Now let;s print the frames up to frame_high, or until there are
  79      frames in the stack. */
  80   for (;
  81        fi && (i <= frame_high || frame_high == -1);
  82        i++, fi = get_prev_frame (fi))
  83     {
  84       QUIT;
  85       /* Print the location and the address always, even for level 0.
  86          args == 0: don't print the arguments. */
  87       print_frame_info (fi, 1, LOC_AND_ADDRESS, 0 /* args */ );
  88     }
  89
  90   do_cleanups (cleanup_stack);
  91   if (i < frame_high)
  92     error (_("mi_cmd_stack_list_frames: Not enough frames in stack."));
  93
  94   return MI_CMD_DONE;
  95 }
  96
  97 enum mi_cmd_result
  98 mi_cmd_stack_info_depth (char *command, char **argv, int argc)
  99 {
 100   int frame_high;
 101   int i;
 102   struct frame_info *fi;
 103
 104   if (argc > 1)
 105     error (_("mi_cmd_stack_info_depth: Usage: [MAX_DEPTH]"));
 106
 107   if (argc == 1)
 108     frame_high = atoi (argv[0]);
 109   else
 110     /* Called with no arguments, it means we want the real depth of
 111        the stack. */
 112     frame_high = -1;
 113
 114   for (i = 0, fi = get_current_frame ();
 115        fi && (i < frame_high || frame_high == -1);
 116        i++, fi = get_prev_frame (fi))
 117     QUIT;
 118
 119   ui_out_field_int (uiout, "depth", i);
 120
 121   return MI_CMD_DONE;
 122 }
 123
 124 /* Print a list of the locals for the current frame. With argument of
 125    0, print only the names, with argument of 1 print also the
 126    values. */
 127 enum mi_cmd_result
 128 mi_cmd_stack_list_locals (char *command, char **argv, int argc)
 129 {
 130   struct frame_info *frame;
 131   enum print_values print_values;
 132
 133   if (argc != 1)
 134     error (_("mi_cmd_stack_list_locals: Usage: PRINT_VALUES"));
 135
 136    frame = get_selected_frame (NULL);
 137
 138    if (strcmp (argv[0], "0") == 0
 139        || strcmp (argv[0], mi_no_values) == 0)
 140      print_values = PRINT_NO_VALUES;
 141    else if (strcmp (argv[0], "1") == 0
 142             || strcmp (argv[0], mi_all_values) == 0)
 143      print_values = PRINT_ALL_VALUES;
 144    else if (strcmp (argv[0], "2") == 0
 145             || strcmp (argv[0], mi_simple_values) == 0)
 146      print_values = PRINT_SIMPLE_VALUES;
 147    else
 148      error (_("Unknown value for PRINT_VALUES: must be: \
 149 0 or \"%s\", 1 or \"%s\", 2 or \"%s\""),
 150             mi_no_values, mi_all_values, mi_simple_values);
 151   list_args_or_locals (1, print_values, frame);
 152   return MI_CMD_DONE;
 153 }
 154
 155 /* Print a list of the arguments for the current frame. With argument
 156    of 0, print only the names, with argument of 1 print also the
 157    values. */
 158 enum mi_cmd_result
 159 mi_cmd_stack_list_args (char *command, char **argv, int argc)
 160 {
 161   int frame_low;
 162   int frame_high;
 163   int i;
 164   struct frame_info *fi;
 165   struct cleanup *cleanup_stack_args;
 166
 167   if (argc < 1 || argc > 3 || argc == 2)
 168     error (_("mi_cmd_stack_list_args: Usage: PRINT_VALUES [FRAME_LOW FRAME_HIGH]"));
 169
 170   if (argc == 3)
 171     {
 172       frame_low = atoi (argv[1]);
 173       frame_high = atoi (argv[2]);
 174     }
 175   else
 176     {
 177       /* Called with no arguments, it means we want args for the whole
 178          backtrace. */
 179       frame_low = -1;
 180       frame_high = -1;
 181     }
 182
 183   /* Let's position fi on the frame at which to start the
 184      display. Could be the innermost frame if the whole stack needs
 185      displaying, or if frame_low is 0. */
 186   for (i = 0, fi = get_current_frame ();
 187        fi && i < frame_low;
 188        i++, fi = get_prev_frame (fi));
 189
 190   if (fi == NULL)
 191     error (_("mi_cmd_stack_list_args: Not enough frames in stack."));
 192
 193   cleanup_stack_args = make_cleanup_ui_out_list_begin_end (uiout, "stack-args");
 194
 195   /* Now let's print the frames up to frame_high, or until there are
 196      frames in the stack. */
 197   for (;
 198        fi && (i <= frame_high || frame_high == -1);
 199        i++, fi = get_prev_frame (fi))
 200     {
 201       struct cleanup *cleanup_frame;
 202       QUIT;
 203       cleanup_frame = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
 204       ui_out_field_int (uiout, "level", i);
 205       list_args_or_locals (0, atoi (argv[0]), fi);
 206       do_cleanups (cleanup_frame);
 207     }
 208
 209   do_cleanups (cleanup_stack_args);
 210   if (i < frame_high)
 211     error (_("mi_cmd_stack_list_args: Not enough frames in stack."));
 212
 213   return MI_CMD_DONE;
 214 }
 215
 216 /* Print a list of the locals or the arguments for the currently
 217    selected frame.  If the argument passed is 0, printonly the names
 218    of the variables, if an argument of 1 is passed, print the values
 219    as well. */
 220 static void
 221 list_args_or_locals (int locals, int values, struct frame_info *fi)
 222 {
 223   struct block *block;
 224   struct symbol *sym;
 225   struct dict_iterator iter;
 226   int nsyms;
 227   struct cleanup *cleanup_list;
 228   static struct ui_stream *stb = NULL;
 229   struct type *type;
 230
 231   stb = ui_out_stream_new (uiout);
 232
 233   block = get_frame_block (fi, 0);
 234
 235   cleanup_list = make_cleanup_ui_out_list_begin_end (uiout, locals ? "locals" : "args");
 236
 237   while (block != 0)
 238     {
 239       ALL_BLOCK_SYMBOLS (block, iter, sym)
 240         {
 241           int print_me = 0;
 242
 243           switch (SYMBOL_CLASS (sym))
 244             {
 245             default:
 246             case LOC_UNDEF:     /* catches errors        */
 247             case LOC_CONST:     /* constant              */
 248             case LOC_TYPEDEF:   /* local typedef         */
 249             case LOC_LABEL:     /* local label           */
 250             case LOC_BLOCK:     /* local function        */
 251             case LOC_CONST_BYTES:       /* loc. byte seq.        */
 252             case LOC_UNRESOLVED:        /* unresolved static     */
 253             case LOC_OPTIMIZED_OUT:     /* optimized out         */
 254               print_me = 0;
 255               break;
 256
 257             case LOC_ARG:       /* argument              */
 258             case LOC_REF_ARG:   /* reference arg         */
 259             case LOC_REGPARM:   /* register arg          */
 260             case LOC_REGPARM_ADDR:      /* indirect register arg */
 261             case LOC_LOCAL_ARG: /* stack arg             */
 262             case LOC_BASEREG_ARG:       /* basereg arg           */
 263             case LOC_COMPUTED_ARG:      /* arg with computed location */
 264               if (!locals)
 265                 print_me = 1;
 266               break;
 267
 268             case LOC_LOCAL:     /* stack local           */
 269             case LOC_BASEREG:   /* basereg local         */
 270             case LOC_STATIC:    /* static                */
 271             case LOC_REGISTER:  /* register              */
 272             case LOC_COMPUTED:  /* computed location     */
 273               if (locals)
 274                 print_me = 1;
 275               break;
 276             }
 277           if (print_me)
 278             {
 279               struct cleanup *cleanup_tuple = NULL;
 280               struct symbol *sym2;
 281               if (values != PRINT_NO_VALUES)
 282                 cleanup_tuple =
 283                   make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 284               ui_out_field_string (uiout, "name", SYMBOL_PRINT_NAME (sym));
 285
 286               if (!locals)
 287                 sym2 = lookup_symbol (SYMBOL_NATURAL_NAME (sym),
 288                                       block, VAR_DOMAIN,
 289                                       (int *) NULL,
 290                                       (struct symtab **) NULL);
 291               else
 292                     sym2 = sym;
 293               switch (values)
 294                 {
 295                 case PRINT_SIMPLE_VALUES:
 296                   type = check_typedef (sym2->type);
 297                   type_print (sym2->type, "", stb->stream, -1);
 298                   ui_out_field_stream (uiout, "type", stb);
 299                   if (TYPE_CODE (type) != TYPE_CODE_ARRAY
 300                       && TYPE_CODE (type) != TYPE_CODE_STRUCT
 301                       && TYPE_CODE (type) != TYPE_CODE_UNION)
 302                     {
 303                       print_variable_value (sym2, fi, stb->stream);
 304                       ui_out_field_stream (uiout, "value", stb);
 305                     }
 306                   do_cleanups (cleanup_tuple);
 307                   break;
 308                 case PRINT_ALL_VALUES:
 309                   print_variable_value (sym2, fi, stb->stream);
 310                   ui_out_field_stream (uiout, "value", stb);
 311                   do_cleanups (cleanup_tuple);
 312                   break;
 313                 }
 314             }
 315         }
 316       if (BLOCK_FUNCTION (block))
 317         break;
 318       else
 319         block = BLOCK_SUPERBLOCK (block);
 320     }
 321   do_cleanups (cleanup_list);
 322   ui_out_stream_delete (stb);
 323 }
 324
 325 enum mi_cmd_result
 326 mi_cmd_stack_select_frame (char *command, char **argv, int argc)
 327 {
 328   if (argc == 0 || argc > 1)
 329     error (_("mi_cmd_stack_select_frame: Usage: FRAME_SPEC"));
 330
 331   select_frame_command (argv[0], 1 /* not used */ );
 332   return MI_CMD_DONE;
 333 }
 334
 335 enum mi_cmd_result
 336 mi_cmd_stack_info_frame (char *command, char **argv, int argc)
 337 {
 338   if (argc > 0)
 339     error (_("mi_cmd_stack_info_frame: No arguments required"));
 340
 341   print_frame_info (get_selected_frame (NULL), 1, LOC_AND_ADDRESS, 0);
 342   return MI_CMD_DONE;
 343 }