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  
 9  void test_sigwaitinfo() {
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      siginfo_t info;
20      int res = sigwaitinfo(&s, &info);
21      assert(!res);
22      // The following checks that sig is initialized.
23      assert(info.si_signo == SIGUSR1);
24      assert(-1 == __msan_test_shadow(&info, sizeof(info)));
25    }
26  }
27  
28  int main(void) {
29    test_sigwaitinfo();
30    return 0;
31  }