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90 lines
2.3 KiB
90 lines
2.3 KiB
/*
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* Copyright 2002-2019 Intel Corporation.
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*
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* This software is provided to you as Sample Source Code as defined in the accompanying
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* End User License Agreement for the Intel(R) Software Development Products ("Agreement")
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* section 1.L.
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*
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* This software and the related documents are provided as is, with no express or implied
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* warranties, other than those that are expressly stated in the License.
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*/
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/*
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* This test verifies that the signal mask is set correctly in
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* a handler when the signal interrupts a sigsuspend() call.
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* The test should have the same output when run natively or
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* under Pin.
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*/
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#include <stdio.h>
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#include <signal.h>
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#include <unistd.h>
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#include <sys/ucontext.h>
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static void Handle(int sig, siginfo_t *info, void *vctxt);
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static void CheckSigs(sigset_t *ss, const char *mesg);
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int main()
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{
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struct sigaction act;
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sigset_t ss;
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act.sa_sigaction = Handle;
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act.sa_flags = SA_SIGINFO;
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sigemptyset(&act.sa_mask);
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if (sigaction(SIGUSR1, &act, 0) != 0)
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{
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fprintf(stderr,"unable to set SIGUSR1 handler\n");
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return 1;
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}
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sigemptyset(&act.sa_mask);
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if (sigaction(SIGUSR2, &act, 0) !=0)
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{
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fprintf(stderr,"unable to set SIGUSR2 handler\n");
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return 1;
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}
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sigfillset(&ss);
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sigprocmask(SIG_SETMASK, &ss, 0);
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kill(getpid(), SIGUSR1);
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kill(getpid(), SIGUSR2);
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sigdelset(&ss, SIGUSR1);
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sigdelset(&ss, SIGUSR2);
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sigdelset(&ss, SIGSEGV);
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sigsuspend(&ss);
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sigprocmask(SIG_SETMASK, 0, &ss);
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CheckSigs(&ss, "After signal");
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return 0;
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}
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static void Handle(int sig, siginfo_t *info, void *vctxt)
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{
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ucontext_t *ctxt = vctxt;
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sigset_t ss;
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printf("Received %s\n", (sig == SIGUSR1) ? "USR1" : "USR2");
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sigprocmask(SIG_SETMASK, 0, &ss);
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CheckSigs(&ss, "In handler");
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CheckSigs(&ctxt->uc_sigmask, "Previous mask");
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}
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static void CheckSigs(sigset_t *ss, const char *mesg)
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{
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printf("%s:\n", mesg);
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if (sigismember(ss, SIGUSR1))
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printf(" USR1 is blocked\n");
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else
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printf(" USR1 is not blocked\n");
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if (sigismember(ss, SIGUSR2))
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printf(" USR2 is blocked\n");
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else
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printf(" USR2 is not blocked\n");
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if (sigismember(ss, SIGSEGV))
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printf(" SEGV is blocked\n");
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else
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printf(" SEGV is not blocked\n");
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}
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