CFI: Add a death test.

base/tools_sanity_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 //
 // This file contains intentional memory errors, some of which may lead to
 // crashes if the test is ran without special memory testing tools. We use these
 // errors to verify the sanity of the tools.
 
 #include "base/atomicops.h"
 #include "base/debug/asan_invalid_access.h"
@@ skipping 321 matching lines @@
 }
 
 TEST(ToolsSanityTest, AtomicsAreIgnored) {
   base::subtle::Atomic32 shared = 0;
   ReleaseStoreThread thread1(&shared);
   AcquireLoadThread thread2(&shared);
   RunInParallel(&thread1, &thread2);
   EXPECT_EQ(kMagicValue, shared);
 }
 
+#if defined(CFI_ENFORCEMENT)
+TEST(ToolsSanityTest, BadCast) {
+  class A {
+    virtual void f() {}
+  };
+
+  class B {
+    virtual void f() {}
+  };
+
+  A a;
+  EXPECT_DEATH((void)(B*)&a, "ILL_ILLOPN");
+}
+#endif
+
 }  // namespace base