gdb/wrapper.c

   1 /* Longjump free calls to gdb internal routines.
   2    Copyright 1999 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include "defs.h"
  20 #include "value.h"
  21 #include "frame.h"
  22 #include "wrapper.h"
  23
  24 /* Use this struct to pass arguments to wrapper routines. We assume
  25    (arbitrarily) that no gdb function takes more than ten arguments. */
  26 struct gdb_wrapper_arguments
  27   {
  28
  29     /* Pointer to some result from the gdb function call, if any */
  30     union wrapper_results
  31       {
  32         int   integer;
  33         void *pointer;
  34       } result;
  35
  36
  37     /* The list of arguments. */
  38     union wrapper_args
  39       {
  40         int   integer;
  41         void *pointer;
  42       } args[10];
  43   };
  44
  45 static int wrap_parse_exp_1 (char *);
  46
  47 static int wrap_evaluate_expression (char *);
  48
  49 static int wrap_value_fetch_lazy (char *);
  50
  51 static int wrap_value_equal (char *);
  52
  53 static int wrap_value_subscript (char *);
  54
  55 static int wrap_value_ind (char *opaque_arg);
  56
  57 static int wrap_parse_and_eval_type (char *);
  58
  59 int
  60 gdb_parse_exp_1 (char **stringptr, struct block *block, int comma,
  61                  struct expression **expression)
  62 {
  63   struct gdb_wrapper_arguments args;
  64   args.args[0].pointer = stringptr;
  65   args.args[1].pointer = block;
  66   args.args[2].integer = comma;
  67
  68   if (!catch_errors ((catch_errors_ftype *) wrap_parse_exp_1, &args,
  69                      "", RETURN_MASK_ERROR))
  70     {
  71       /* An error occurred */
  72       return 0;
  73     }
  74
  75   *expression = (struct expression *) args.result.pointer;
  76   return 1;
  77
  78 }
  79
  80 static int
  81 wrap_parse_exp_1 (char *argptr)
  82 {
  83   struct gdb_wrapper_arguments *args
  84     = (struct gdb_wrapper_arguments *) argptr;
  85   args->result.pointer = parse_exp_1((char **) args->args[0].pointer,
  86                                      (struct block *) args->args[1].pointer,
  87                                      args->args[2].integer);
  88   return 1;
  89 }
  90
  91 int
  92 gdb_evaluate_expression (struct expression *exp, value_ptr *value)
  93 {
  94   struct gdb_wrapper_arguments args;
  95   args.args[0].pointer = exp;
  96
  97   if (!catch_errors ((catch_errors_ftype *) wrap_evaluate_expression, &args,
  98                      "", RETURN_MASK_ERROR))
  99     {
 100       /* An error occurred */
 101       return 0;
 102     }
 103
 104   *value = (value_ptr) args.result.pointer;
 105   return 1;
 106 }
 107
 108 static int
 109 wrap_evaluate_expression (char *a)
 110 {
 111   struct gdb_wrapper_arguments *args = (struct gdb_wrapper_arguments *) a;
 112
 113   (args)->result.pointer =
 114     (char *) evaluate_expression ((struct expression *) args->args[0].pointer);
 115   return 1;
 116 }
 117
 118 int
 119 gdb_value_fetch_lazy (value_ptr value)
 120 {
 121   struct gdb_wrapper_arguments args;
 122
 123   args.args[0].pointer = value;
 124   return catch_errors ((catch_errors_ftype *) wrap_value_fetch_lazy, &args,
 125                        "", RETURN_MASK_ERROR);
 126 }
 127
 128 static int
 129 wrap_value_fetch_lazy (char *a)
 130 {
 131   struct gdb_wrapper_arguments *args = (struct gdb_wrapper_arguments *) a;
 132
 133   value_fetch_lazy ((value_ptr) (args)->args[0].pointer);
 134   return 1;
 135 }
 136
 137 int
 138 gdb_value_equal (value_ptr val1, value_ptr val2, int *result)
 139 {
 140   struct gdb_wrapper_arguments args;
 141
 142   args.args[0].pointer = val1;
 143   args.args[1].pointer = val2;
 144
 145   if (!catch_errors ((catch_errors_ftype *) wrap_value_equal, &args,
 146                      "", RETURN_MASK_ERROR))
 147     {
 148       /* An error occurred */
 149       return 0;
 150     }
 151
 152   *result = args.result.integer;
 153   return 1;
 154 }
 155
 156 static int
 157 wrap_value_equal (char *a)
 158 {
 159   struct gdb_wrapper_arguments *args = (struct gdb_wrapper_arguments *) a;
 160   value_ptr val1, val2;
 161
 162   val1 = (value_ptr) (args)->args[0].pointer;
 163   val2 = (value_ptr) (args)->args[1].pointer;
 164
 165   (args)->result.integer = value_equal (val1, val2);
 166   return 1;
 167 }
 168
 169 int
 170 gdb_value_subscript (value_ptr val1, value_ptr val2, value_ptr *rval)
 171 {
 172   struct gdb_wrapper_arguments args;
 173
 174   args.args[0].pointer = val1;
 175   args.args[1].pointer = val2;
 176
 177   if (!catch_errors ((catch_errors_ftype *) wrap_value_subscript, &args,
 178                      "", RETURN_MASK_ERROR))
 179     {
 180       /* An error occurred */
 181       return 0;
 182     }
 183
 184   *rval = (value_ptr) args.result.pointer;
 185   return 1;
 186 }
 187
 188 static int
 189 wrap_value_subscript (char *a)
 190 {
 191   struct gdb_wrapper_arguments *args = (struct gdb_wrapper_arguments *) a;
 192   value_ptr val1, val2;
 193
 194   val1 = (value_ptr) (args)->args[0].pointer;
 195   val2 = (value_ptr) (args)->args[1].pointer;
 196
 197   (args)->result.pointer = value_subscript (val1, val2);
 198   return 1;
 199 }
 200
 201 int
 202 gdb_value_ind (value_ptr val, value_ptr *rval)
 203 {
 204   struct gdb_wrapper_arguments args;
 205
 206   args.args[0].pointer = val;
 207
 208   if (!catch_errors ((catch_errors_ftype *) wrap_value_ind, &args,
 209                      "", RETURN_MASK_ERROR))
 210     {
 211       /* An error occurred */
 212       return 0;
 213     }
 214
 215   *rval = (value_ptr) args.result.pointer;
 216   return 1;
 217 }
 218
 219 static int
 220 wrap_value_ind (char *opaque_arg)
 221 {
 222   struct gdb_wrapper_arguments *args = (struct gdb_wrapper_arguments *) opaque_arg;
 223   value_ptr val;
 224
 225   val = (value_ptr) (args)->args[0].pointer;
 226   (args)->result.pointer = value_ind (val);
 227   return 1;
 228 }
 229
 230 int
 231 gdb_parse_and_eval_type (char *p, int length, struct type **type)
 232 {
 233   struct gdb_wrapper_arguments args;
 234   args.args[0].pointer = p;
 235   args.args[1].integer = length;
 236
 237   if (!catch_errors ((catch_errors_ftype *) wrap_parse_and_eval_type, &args,
 238                      "", RETURN_MASK_ALL))
 239     {
 240       /* An error occurred */
 241       return 0;
 242     }
 243
 244   *type = (struct type *) args.result.pointer;
 245   return 1;
 246 }
 247
 248 static int
 249 wrap_parse_and_eval_type (char *a)
 250 {
 251   struct gdb_wrapper_arguments *args = (struct gdb_wrapper_arguments *) a;
 252
 253   char *p = (char *) args->args[0].pointer;
 254   int length = args->args[1].integer;
 255
 256   args->result.pointer = (char *) parse_and_eval_type (p, length);
 257
 258   return 1;
 259 }