CFI: Add a test for distinguishing between non-overriding siblings.

llvm-svn: 232238

compiler-rt/test/cfi/sibling.cpp

@@ -0,0 +1,67 @@
+// XFAIL: *
+
+// RUN: %clangxx_cfi -o %t %s
+// RUN: not --crash %t 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: %clangxx_cfi -DB64 -o %t %s
+// RUN: not --crash %t 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: %clangxx -o %t %s
+// RUN: %t 2>&1 | FileCheck --check-prefix=NCFI %s
+
+// Tests that the CFI enforcement distinguishes betwen non-overriding siblings.
+// XFAILed as not implemented yet.
+
+#include <stdio.h>
+#include "utils.h"
+
+struct A {
+  virtual void f();
+};
+
+void A::f() {}
+
+struct B : A {
+  virtual void f();
+};
+
+void B::f() {}
+
+struct C : A {
+};
+
+int main() {
+#ifdef B32
+  break_optimization(new Deriver<B, 0>);
+#endif
+
+#ifdef B64
+  break_optimization(new Deriver<B, 0>);
+  break_optimization(new Deriver<B, 1>);
+#endif
+
+#ifdef BM
+  break_optimization(new Deriver<B, 0>);
+  break_optimization(new Deriver<B, 1>);
+  break_optimization(new Deriver<B, 2>);
+#endif
+
+  B *b = new B;
+  break_optimization(b);
+
+  // CFI: 1
+  // NCFI: 1
+  fprintf(stderr, "1\n");
+
+  ((C *)b)->f(); // UB here
+
+  // CFI-NOT: 2
+  // NCFI: 2
+  fprintf(stderr, "2\n");
+}