1 /******************************************************************************/ 2 /* */ 3 /* Copyright (c) 2009 FUJITSU LIMITED */ 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 2 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 */ 13 /* the 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, write to the Free Software */ 17 /* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ 18 /* */ 19 /* Author: Miao Xie <miaox (at) cn.fujitsu.com> */ 20 /* Restructure for LTP: Shi Weihua <shiwh (at) cn.fujitsu.com> */ 21 /* */ 22 /******************************************************************************/ 23 24 #include <stdio.h> 25 #include <math.h> 26 #include <err.h> 27 #include <errno.h> 28 #include <signal.h> 29 30 #define __USE_GNU 31 #include <sched.h> 32 33 #define UNUSED __attribute__ ((unused)) 34 35 unsigned long count; 36 volatile int start = 0; 37 volatile double f = 2744545.34456455; 38 39 void sighandler(UNUSED int signo) 40 { 41 start = !start; 42 } 43 44 int main(void) 45 { 46 sigset_t sigset; 47 struct sigaction sa; 48 49 sa.sa_handler = sighandler; 50 if (sigemptyset(&sa.sa_mask) < 0) 51 err(1, "sigemptyset()"); 52 53 sa.sa_flags = 0; 54 if (sigaction(SIGUSR1, &sa, NULL) < 0) 55 err(1, "sigaction()"); 56 57 if (sigemptyset(&sigset) < 0) 58 err(1, "sigemptyset()"); 59 60 sigsuspend(&sigset); 61 if (errno != EINTR) 62 err(1, "sigsuspend()"); 63 64 while (start) { 65 f = sqrt(f * f); 66 } 67 68 return 0; 69 } 70
