1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2011-2016 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 #include <unistd.h> 22 23 volatile char *p = NULL; 24 25 extern long 26 bowler (void) 27 { 28 return *p; 29 } 30 31 extern void 32 keeper (int sig) 33 { 34 static int recurse = 0; 35 if (++recurse < 3) 36 bowler (); 37 38 _exit (0); 39 } 40 41 int 42 main (void) 43 { 44 struct sigaction act; 45 memset (&act, 0, sizeof act); 46 act.sa_handler = keeper; 47 act.sa_flags = SA_NODEFER; 48 sigaction (SIGSEGV, &act, NULL); 49 sigaction (SIGBUS, &act, NULL); 50 51 bowler (); 52 return 0; 53 } 54