gdb/mi/mi-cmd-stack.c

   1 /* MI Command Set - stack commands.
   2    Copyright (C) 2000, 2002, 2003, 2004, 2005, 2007, 2008, 2009
   3    Free Software Foundation, Inc.
   4    Contributed by Cygnus Solutions (a Red Hat company).
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "defs.h"
  22 #include "target.h"
  23 #include "frame.h"
  24 #include "value.h"
  25 #include "mi-cmds.h"
  26 #include "ui-out.h"
  27 #include "symtab.h"
  28 #include "block.h"
  29 #include "stack.h"
  30 #include "dictionary.h"
  31 #include "gdb_string.h"
  32 #include "language.h"
  33 #include "valprint.h"
  34
  35 static void list_args_or_locals (int locals, int values, struct frame_info *fi);
  36
  37 /* Print a list of the stack frames. Args can be none, in which case
  38    we want to print the whole backtrace, or a pair of numbers
  39    specifying the frame numbers at which to start and stop the
  40    display. If the two numbers are equal, a single frame will be
  41    displayed. */
  42 void
  43 mi_cmd_stack_list_frames (char *command, char **argv, int argc)
  44 {
  45   int frame_low;
  46   int frame_high;
  47   int i;
  48   struct cleanup *cleanup_stack;
  49   struct frame_info *fi;
  50
  51   if (argc > 2 || argc == 1)
  52     error (_("mi_cmd_stack_list_frames: Usage: [FRAME_LOW FRAME_HIGH]"));
  53
  54   if (argc == 2)
  55     {
  56       frame_low = atoi (argv[0]);
  57       frame_high = atoi (argv[1]);
  58     }
  59   else
  60     {
  61       /* Called with no arguments, it means we want the whole
  62          backtrace. */
  63       frame_low = -1;
  64       frame_high = -1;
  65     }
  66
  67   /* Let's position fi on the frame at which to start the
  68      display. Could be the innermost frame if the whole stack needs
  69      displaying, or if frame_low is 0. */
  70   for (i = 0, fi = get_current_frame ();
  71        fi && i < frame_low;
  72        i++, fi = get_prev_frame (fi));
  73
  74   if (fi == NULL)
  75     error (_("mi_cmd_stack_list_frames: Not enough frames in stack."));
  76
  77   cleanup_stack = make_cleanup_ui_out_list_begin_end (uiout, "stack");
  78
  79   /* Now let;s print the frames up to frame_high, or until there are
  80      frames in the stack. */
  81   for (;
  82        fi && (i <= frame_high || frame_high == -1);
  83        i++, fi = get_prev_frame (fi))
  84     {
  85       QUIT;
  86       /* Print the location and the address always, even for level 0.
  87          args == 0: don't print the arguments. */
  88       print_frame_info (fi, 1, LOC_AND_ADDRESS, 0 /* args */ );
  89     }
  90
  91   do_cleanups (cleanup_stack);
  92 }
  93
  94 void
  95 mi_cmd_stack_info_depth (char *command, char **argv, int argc)
  96 {
  97   int frame_high;
  98   int i;
  99   struct frame_info *fi;
 100
 101   if (argc > 1)
 102     error (_("mi_cmd_stack_info_depth: Usage: [MAX_DEPTH]"));
 103
 104   if (argc == 1)
 105     frame_high = atoi (argv[0]);
 106   else
 107     /* Called with no arguments, it means we want the real depth of
 108        the stack. */
 109     frame_high = -1;
 110
 111   for (i = 0, fi = get_current_frame ();
 112        fi && (i < frame_high || frame_high == -1);
 113        i++, fi = get_prev_frame (fi))
 114     QUIT;
 115
 116   ui_out_field_int (uiout, "depth", i);
 117 }
 118
 119 /* Print a list of the locals for the current frame. With argument of
 120    0, print only the names, with argument of 1 print also the
 121    values. */
 122 void
 123 mi_cmd_stack_list_locals (char *command, char **argv, int argc)
 124 {
 125   struct frame_info *frame;
 126   enum print_values print_values;
 127
 128   if (argc != 1)
 129     error (_("mi_cmd_stack_list_locals: Usage: PRINT_VALUES"));
 130
 131    frame = get_selected_frame (NULL);
 132
 133    if (strcmp (argv[0], "0") == 0
 134        || strcmp (argv[0], mi_no_values) == 0)
 135      print_values = PRINT_NO_VALUES;
 136    else if (strcmp (argv[0], "1") == 0
 137             || strcmp (argv[0], mi_all_values) == 0)
 138      print_values = PRINT_ALL_VALUES;
 139    else if (strcmp (argv[0], "2") == 0
 140             || strcmp (argv[0], mi_simple_values) == 0)
 141      print_values = PRINT_SIMPLE_VALUES;
 142    else
 143      error (_("Unknown value for PRINT_VALUES: must be: \
 144 0 or \"%s\", 1 or \"%s\", 2 or \"%s\""),
 145             mi_no_values, mi_all_values, mi_simple_values);
 146   list_args_or_locals (1, print_values, frame);
 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 void
 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   struct cleanup *cleanup_stack_args;
 160
 161   if (argc < 1 || argc > 3 || argc == 2)
 162     error (_("mi_cmd_stack_list_args: Usage: PRINT_VALUES [FRAME_LOW FRAME_HIGH]"));
 163
 164   if (argc == 3)
 165     {
 166       frame_low = atoi (argv[1]);
 167       frame_high = atoi (argv[2]);
 168     }
 169   else
 170     {
 171       /* Called with no arguments, it means we want args for the whole
 172          backtrace. */
 173       frame_low = -1;
 174       frame_high = -1;
 175     }
 176
 177   /* Let's position fi on the frame at which to start the
 178      display. Could be the innermost frame if the whole stack needs
 179      displaying, or if frame_low is 0. */
 180   for (i = 0, fi = get_current_frame ();
 181        fi && i < frame_low;
 182        i++, fi = get_prev_frame (fi));
 183
 184   if (fi == NULL)
 185     error (_("mi_cmd_stack_list_args: Not enough frames in stack."));
 186
 187   cleanup_stack_args = make_cleanup_ui_out_list_begin_end (uiout, "stack-args");
 188
 189   /* Now let's print the frames up to frame_high, or until there are
 190      frames in the stack. */
 191   for (;
 192        fi && (i <= frame_high || frame_high == -1);
 193        i++, fi = get_prev_frame (fi))
 194     {
 195       struct cleanup *cleanup_frame;
 196       QUIT;
 197       cleanup_frame = make_cleanup_ui_out_tuple_begin_end (uiout, "frame");
 198       ui_out_field_int (uiout, "level", i);
 199       list_args_or_locals (0, atoi (argv[0]), fi);
 200       do_cleanups (cleanup_frame);
 201     }
 202
 203   do_cleanups (cleanup_stack_args);
 204 }
 205
 206 /* Print a list of the locals or the arguments for the currently
 207    selected frame.  If the argument passed is 0, printonly the names
 208    of the variables, if an argument of 1 is passed, print the values
 209    as well. */
 210 static void
 211 list_args_or_locals (int locals, int values, struct frame_info *fi)
 212 {
 213   struct block *block;
 214   struct symbol *sym;
 215   struct dict_iterator iter;
 216   int nsyms;
 217   struct cleanup *cleanup_list;
 218   static struct ui_stream *stb = NULL;
 219   struct type *type;
 220
 221   stb = ui_out_stream_new (uiout);
 222
 223   block = get_frame_block (fi, 0);
 224
 225   cleanup_list = make_cleanup_ui_out_list_begin_end (uiout, locals ? "locals" : "args");
 226
 227   while (block != 0)
 228     {
 229       ALL_BLOCK_SYMBOLS (block, iter, sym)
 230         {
 231           int print_me = 0;
 232
 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_ADDR:      /* indirect register arg */
 250             case LOC_LOCAL:     /* stack local           */
 251             case LOC_STATIC:    /* static                */
 252             case LOC_REGISTER:  /* register              */
 253             case LOC_COMPUTED:  /* computed location     */
 254               if (SYMBOL_IS_ARGUMENT (sym) ? !locals : locals)
 255                 print_me = 1;
 256               break;
 257             }
 258           if (print_me)
 259             {
 260               struct cleanup *cleanup_tuple = NULL;
 261               struct symbol *sym2;
 262               struct value *val;
 263               if (values != PRINT_NO_VALUES)
 264                 cleanup_tuple =
 265                   make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
 266               ui_out_field_string (uiout, "name", SYMBOL_PRINT_NAME (sym));
 267
 268               if (!locals)
 269                 sym2 = lookup_symbol (SYMBOL_NATURAL_NAME (sym),
 270                                       block, VAR_DOMAIN,
 271                                       (int *) NULL);
 272               else
 273                 sym2 = sym;
 274               switch (values)
 275                 {
 276                 case PRINT_SIMPLE_VALUES:
 277                   type = check_typedef (sym2->type);
 278                   type_print (sym2->type, "", stb->stream, -1);
 279                   ui_out_field_stream (uiout, "type", stb);
 280                   if (TYPE_CODE (type) != TYPE_CODE_ARRAY
 281                       && TYPE_CODE (type) != TYPE_CODE_STRUCT
 282                       && TYPE_CODE (type) != TYPE_CODE_UNION)
 283                     {
 284                       struct value_print_options opts;
 285                       val = read_var_value (sym2, fi);
 286                       get_raw_print_options (&opts);
 287                       opts.deref_ref = 1;
 288                       common_val_print
 289                         (val, stb->stream, 0, &opts,
 290                          language_def (SYMBOL_LANGUAGE (sym2)));
 291                       ui_out_field_stream (uiout, "value", stb);
 292                     }
 293                   do_cleanups (cleanup_tuple);
 294                   break;
 295                 case PRINT_ALL_VALUES:
 296                   {
 297                     struct value_print_options opts;
 298                     val = read_var_value (sym2, fi);
 299                     get_raw_print_options (&opts);
 300                     opts.deref_ref = 1;
 301                     common_val_print
 302                       (val, stb->stream, 0, &opts,
 303                        language_def (SYMBOL_LANGUAGE (sym2)));
 304                     ui_out_field_stream (uiout, "value", stb);
 305                     do_cleanups (cleanup_tuple);
 306                   }
 307                   break;
 308                 }
 309             }
 310         }
 311       if (BLOCK_FUNCTION (block))
 312         break;
 313       else
 314         block = BLOCK_SUPERBLOCK (block);
 315     }
 316   do_cleanups (cleanup_list);
 317   ui_out_stream_delete (stb);
 318 }
 319
 320 void
 321 mi_cmd_stack_select_frame (char *command, char **argv, int argc)
 322 {
 323   if (argc == 0 || argc > 1)
 324     error (_("mi_cmd_stack_select_frame: Usage: FRAME_SPEC"));
 325
 326   select_frame_command (argv[0], 1 /* not used */ );
 327 }
 328
 329 void
 330 mi_cmd_stack_info_frame (char *command, char **argv, int argc)
 331 {
 332   if (argc > 0)
 333     error (_("mi_cmd_stack_info_frame: No arguments required"));
 334
 335   print_frame_info (get_selected_frame (NULL), 1, LOC_AND_ADDRESS, 0);
 336 }