1 files changed, 28 insertions, 0 deletions
diff --git a/lib/msan/lit_tests/cxa_atexit.cc b/lib/msan/lit_tests/cxa_atexit.cc
new file mode 100644
index 000000000000..f3641aadce03
--- /dev/null
+++ b/lib/msan/lit_tests/cxa_atexit.cc
@@ -0,0 +1,28 @@
+// RUN: %clangxx_msan -m64 -O0 %s -o %t && %t %p
+
+// PR17377: C++ module destructors get stale argument shadow.
+
+#include <stdio.h>
+#include <stdlib.h>
+class A {
+public:
+  // This destructor get stale argument shadow left from the call to f().
+  ~A() {
+    if (this)
+      exit(0);
+  }
+};
+
+A a;
+
+__attribute__((noinline))
+void f(long x) {
+}
+
+int main(void) {
+  long  x;
+  long * volatile p = &x;
+  // This call poisons TLS shadow for the first function argument.
+  f(*p);
+  return 0;
+}