mirror of https://github.com/xemu-project/xemu.git
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/*
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* Test that sigreturn() does not corrupt the signal mask.
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* Block SIGUSR2 and handle SIGUSR1.
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* Then sigwait() SIGUSR2, which relies on it remaining blocked.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <assert.h>
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#include <pthread.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <unistd.h>
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int seen_sig = -1;
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static void signal_func(int sig)
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{
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seen_sig = sig;
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}
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static void *thread_func(void *arg)
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{
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kill(getpid(), SIGUSR2);
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return NULL;
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}
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int main(void)
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{
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struct sigaction act = {
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.sa_handler = signal_func,
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};
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pthread_t thread;
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sigset_t set;
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int sig;
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assert(sigaction(SIGUSR1, &act, NULL) == 0);
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assert(sigemptyset(&set) == 0);
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assert(sigaddset(&set, SIGUSR2) == 0);
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assert(sigprocmask(SIG_BLOCK, &set, NULL) == 0);
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kill(getpid(), SIGUSR1);
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assert(seen_sig == SIGUSR1);
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assert(pthread_create(&thread, NULL, thread_func, NULL) == 0);
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assert(sigwait(&set, &sig) == 0);
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assert(sig == SIGUSR2);
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assert(pthread_join(thread, NULL) == 0);
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return EXIT_SUCCESS;
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}
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