gdb/testsuite/gdb.base/sigbpt.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2004, 2007, 2008, 2009 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <signal.h>
  19 #include <stdlib.h>
  20 #include <string.h>
  21
  22 extern void
  23 keeper (int sig)
  24 {
  25 }
  26
  27 volatile long v1 = 0;
  28 volatile long v2 = 0;
  29 volatile long v3 = 0;
  30
  31 extern long
  32 bowler (void)
  33 {
  34   /* Try to read address zero.  Do it in a slightly convoluted way so
  35      that more than one instruction is used.  */
  36   return *(char *) (v1 + v2 + v3);
  37 }
  38
  39 int
  40 main ()
  41 {
  42   static volatile int i;
  43
  44   struct sigaction act;
  45   memset (&act, 0, sizeof act);
  46   act.sa_handler = keeper;
  47   sigaction (SIGSEGV, &act, NULL);
  48   sigaction (SIGBUS, &act, NULL);
  49
  50   bowler ();
  51   return 0;
  52 }