1 files changed, 31 insertions, 0 deletions
diff --git a/test/msan/sigwaitinfo.cc b/test/msan/sigwaitinfo.cc
new file mode 100644
index 000000000000..be7a2c009e0e
--- /dev/null
+++ b/test/msan/sigwaitinfo.cc
@@ -0,0 +1,31 @@
+// RUN: %clangxx_msan -std=c++11 -O0 -g %s -o %t && %run %t
+
+#include <assert.h>
+#include <sanitizer/msan_interface.h>
+#include <signal.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+void test_sigwaitinfo() {
+  sigset_t s;
+  sigemptyset(&s);
+  sigaddset(&s, SIGUSR1);
+  sigprocmask(SIG_BLOCK, &s, 0);
+
+  if (pid_t pid = fork()) {
+    kill(pid, SIGUSR1);
+    _exit(0);
+  } else {
+    siginfo_t info;
+    int res = sigwaitinfo(&s, &info);
+    assert(!res);
+    // The following checks that sig is initialized.
+    assert(info.si_signo == SIGUSR1);
+    assert(-1 == __msan_test_shadow(&info, sizeof(info)));
+  }
+}
+
+int main(void) {
+  test_sigwaitinfo();
+  return 0;
+}