1 files changed, 18 insertions, 0 deletions
diff --git a/test/msan/rand_r.cc b/test/msan/rand_r.cc
new file mode 100644
index 0000000000000..d6bdb1deaa686
--- /dev/null
+++ b/test/msan/rand_r.cc
@@ -0,0 +1,18 @@
+// RUN: %clangxx_msan -m64 -O0 -g %s -o %t && %run %t
+// RUN: %clangxx_msan -m64 -O0 -g -DUNINIT %s -o %t && not %run %t 2>&1 | FileCheck %s
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int main(void) {
+  unsigned seed;
+#ifndef UNINIT
+  seed = 42;
+#endif
+  int v = rand_r(&seed);
+  // CHECK: MemorySanitizer: use-of-uninitialized-value
+  // CHECK: in main{{.*}}rand_r.cc:[[@LINE-2]]
+  if (v) printf(".\n");
+  return 0;
+}