1/* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2004-2020 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*/ 19 20#include <stdio.h> 21#include <string.h> 22#include <signal.h> 23#include <sys/time.h> 24 25static volatile int done; 26 27#ifdef SA_SIGINFO 28static void /* HANDLER */ 29handler (int sig, siginfo_t *info, void *context) 30{ 31 done = 1; 32} /* handler */ 33#else 34static void 35handler (int sig) 36{ 37 done = 1; 38} /* handler */ 39#endif 40 41int 42main () 43{ 44 /* Set up the signal handler. */ 45 { 46 struct sigaction action; 47 memset (&action, 0, sizeof (action)); 48#ifdef SA_SIGINFO 49 action.sa_sigaction = handler; 50 action.sa_flags |= SA_SIGINFO; 51#else 52 action.sa_handler = handler; 53#endif 54 sigaction (SIGVTALRM, &action, NULL); 55 } 56 57 /* Set up a one-off timer. A timer, rather than SIGSEGV, is used as 58 after a timer handler finishes the interrupted code can safely 59 resume. */ 60 { 61 struct itimerval itime; 62 memset (&itime, 0, sizeof (itime)); 63 itime.it_value.tv_usec = 250 * 1000; 64 setitimer (ITIMER_VIRTUAL, &itime, NULL); 65 } 66 /* Wait. */ 67 while (!done); 68 return 0; 69} /* main */ 70