1 files changed, 82 insertions, 0 deletions
diff --git a/test/cfi/multiple-inheritance.cpp b/test/cfi/multiple-inheritance.cpp
new file mode 100644
index 0000000000000..523af6f72f2fd
--- /dev/null
+++ b/test/cfi/multiple-inheritance.cpp
@@ -0,0 +1,82 @@
+// RUN: %clangxx_cfi -o %t %s
+// RUN: not --crash %t 2>&1 | FileCheck --check-prefix=CFI %s
+// RUN: not --crash %t x 2>&1 | FileCheck --check-prefix=CFI %s
+
+// RUN: %clangxx_cfi -DB32 -o %t %s
+// RUN: not --crash %t 2>&1 | FileCheck --check-prefix=CFI %s
+// RUN: not --crash %t x 2>&1 | FileCheck --check-prefix=CFI %s
+
+// RUN: %clangxx_cfi -DB64 -o %t %s
+// RUN: not --crash %t 2>&1 | FileCheck --check-prefix=CFI %s
+// RUN: not --crash %t x 2>&1 | FileCheck --check-prefix=CFI %s
+
+// RUN: %clangxx_cfi -DBM -o %t %s
+// RUN: not --crash %t 2>&1 | FileCheck --check-prefix=CFI %s
+// RUN: not --crash %t x 2>&1 | FileCheck --check-prefix=CFI %s
+
+// RUN: %clangxx -o %t %s
+// RUN: %t 2>&1 | FileCheck --check-prefix=NCFI %s
+// RUN: %t x 2>&1 | FileCheck --check-prefix=NCFI %s
+
+// Tests that the CFI mechanism is sensitive to multiple inheritance and only
+// permits calls via virtual tables for the correct base class.
+
+#include <stdio.h>
+#include "utils.h"
+
+struct A {
+  virtual void f() = 0;
+};
+
+struct B {
+  virtual void g() = 0;
+};
+
+struct C : A, B {
+  virtual void f(), g();
+};
+
+void C::f() {}
+void C::g() {}
+
+int main(int argc, char **argv) {
+#ifdef B32
+  break_optimization(new Deriver<A, 0>);
+  break_optimization(new Deriver<B, 0>);
+#endif
+
+#ifdef B64
+  break_optimization(new Deriver<A, 0>);
+  break_optimization(new Deriver<A, 1>);
+  break_optimization(new Deriver<B, 0>);
+  break_optimization(new Deriver<B, 1>);
+#endif
+
+#ifdef BM
+  break_optimization(new Deriver<A, 0>);
+  break_optimization(new Deriver<A, 1>);
+  break_optimization(new Deriver<A, 2>);
+  break_optimization(new Deriver<B, 0>);
+  break_optimization(new Deriver<B, 1>);
+  break_optimization(new Deriver<B, 2>);
+#endif
+
+  C *c = new C;
+  break_optimization(c);
+
+  // CFI: 1
+  // NCFI: 1
+  fprintf(stderr, "1\n");
+
+  if (argc > 1) {
+    A *a = c;
+    ((B *)a)->g(); // UB here
+  } else {
+    B *b = c;
+    ((A *)b)->f(); // UB here
+  }
+
+  // CFI-NOT: 2
+  // NCFI: 2
+  fprintf(stderr, "2\n");
+}