1 // RUN: %clangxx_msan -std=c++11 -O0 -g %s -o %t && %run %t
2 
3 #include <assert.h>
4 #include <sanitizer/msan_interface.h>
5 #include <signal.h>
6 #include <sys/time.h>
7 #include <unistd.h>
8 
test_sigwait()9 void test_sigwait() {
10   sigset_t s;
11   sigemptyset(&s);
12   sigaddset(&s, SIGUSR1);
13   sigprocmask(SIG_BLOCK, &s, 0);
14 
15   if (pid_t pid = fork()) {
16     kill(pid, SIGUSR1);
17     _exit(0);
18   } else {
19     int sig;
20     int res = sigwait(&s, &sig);
21     assert(!res);
22     // The following checks that sig is initialized.
23     assert(sig == SIGUSR1);
24   }
25 }
26 
main(void)27 int main(void) {
28   test_sigwait();
29   return 0;
30 }
31