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141 lines
3.0 KiB
141 lines
3.0 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 prints the application's blocked signal mask at various points.
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* By comparing a native run with a run under Pin, we can verify that Pin emulates
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* the signal mask correctly.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <sys/ucontext.h>
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#if defined(TARGET_MAC)
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#define MAXMASK 32
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#else
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#define MAXMASK 64
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#endif
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static void Handle(int);
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static void PrintCurrentMask(const char *);
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static void PrintMask(const char *, sigset_t *);
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int main()
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{
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struct sigaction act;
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sigset_t mask;
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sigemptyset(&mask);
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sigaddset(&mask, SIGSTOP);
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sigaddset(&mask, SIGFPE);
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if (sigprocmask(SIG_SETMASK, &mask, 0) != 0)
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{
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fprintf(stderr, "unable to set blocked signal mask\n");
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return 1;
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}
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PrintCurrentMask("Initial: ");
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act.sa_handler = Handle;
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act.sa_flags = SA_NODEFER;
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sigemptyset(&act.sa_mask);
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sigaddset(&act.sa_mask, SIGSEGV);
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sigaddset(&act.sa_mask, SIGHUP);
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sigaddset(&act.sa_mask, SIGKILL);
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if (sigaction(SIGUSR1, &act, 0) != 0)
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{
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fprintf(stderr, "Unable to set USR1 handler\n");
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return 1;
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}
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act.sa_flags = 0;
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if (sigaction(SIGUSR2, &act, 0) != 0)
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{
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fprintf(stderr, "Unable to set USR2 handler\n");
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return 1;
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}
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raise(SIGUSR1);
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PrintCurrentMask("After USR1: ");
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raise(SIGUSR2);
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PrintCurrentMask("After USR2: ");
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sigemptyset(&act.sa_mask);
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if (sigaction(SIGUSR1, 0, &act) != 0)
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{
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fprintf(stderr, "Unable to get USR1 hander\n");
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return 1;
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}
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PrintMask("USR1 Blocks: ", &act.sa_mask);
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sigemptyset(&act.sa_mask);
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if (sigaction(SIGUSR2, 0, &act) != 0)
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{
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fprintf(stderr, "Unable to get USR2 hander\n");
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return 1;
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}
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PrintMask("USR2 Blocks: ", &act.sa_mask);
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return 0;
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}
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static void Handle(int sig)
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{
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if (sig == SIGUSR1)
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PrintCurrentMask("USR1 handler: ");
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else if (sig == SIGUSR2)
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PrintCurrentMask("USR2 handler: ");
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else
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{
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fprintf(stderr, "Unexpected signal %d\n", sig);
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exit(1);
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}
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}
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static void PrintCurrentMask(const char *prefix)
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{
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sigset_t mask;
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if (sigprocmask(SIG_SETMASK, 0, &mask) == 0)
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PrintMask(prefix, &mask);
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else
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printf("%s[ERROR]\n", prefix);
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}
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static void PrintMask(const char *prefix, sigset_t *mask)
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{
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int sig;
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int first;
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first = 1;
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printf("%s[", prefix);
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for (sig = 1; sig < MAXMASK; sig++)
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{
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if (sigismember(mask, sig))
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{
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if (!first)
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printf(" ");
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first = 0;
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printf("%d", sig);
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}
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}
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printf("]\n");
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}
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