| 1 | /* This testcase is part of GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright 2004, 2007, 2008 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 | |
| 49 | bowler (); |
| 50 | return 0; |
| 51 | } |