From 678e78ca950ec47f77d14aae9cc92883e31e65ae Mon Sep 17 00:00:00 2001
From: Peter Collingbourne <peter@pcc.me.uk>
Date: Sat, 14 Mar 2015 02:42:39 +0000
Subject: [PATCH] CFI: Add test for bad cast checks.

llvm-svn: 232242
---
 compiler-rt/test/cfi/bad-cast.cpp | 136 ++++++++++++++++++++++++++++++
 1 file changed, 136 insertions(+)
 create mode 100644 compiler-rt/test/cfi/bad-cast.cpp

diff --git a/compiler-rt/test/cfi/bad-cast.cpp b/compiler-rt/test/cfi/bad-cast.cpp
new file mode 100644
index 000000000000..39d8a351be38
--- /dev/null
+++ b/compiler-rt/test/cfi/bad-cast.cpp
@@ -0,0 +1,136 @@
+// RUN: %clangxx_cfi -o %t %s
+// RUN: not --crash %t a 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t b 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t c 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: %t d 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t e 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t f 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: not --crash %t g 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: %t h 2>&1 | FileCheck --check-prefix=PASS %s
+
+// RUN: %clangxx_cfi -DB32 -o %t %s
+// RUN: not --crash %t a 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t b 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t c 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: %t d 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t e 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t f 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: not --crash %t g 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: %t h 2>&1 | FileCheck --check-prefix=PASS %s
+
+// RUN: %clangxx_cfi -DB64 -o %t %s
+// RUN: not --crash %t a 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t b 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t c 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: %t d 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t e 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t f 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: not --crash %t g 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: %t h 2>&1 | FileCheck --check-prefix=PASS %s
+
+// RUN: %clangxx_cfi -DBM -o %t %s
+// RUN: not --crash %t a 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t b 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t c 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: %t d 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t e 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t f 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: not --crash %t g 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: %t h 2>&1 | FileCheck --check-prefix=PASS %s
+
+// RUN: %clangxx_cfi -fsanitize=cfi-cast-strict -o %t %s
+// RUN: not --crash %t a 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t b 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t c 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t d 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t e 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t f 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t g 2>&1 | FileCheck --check-prefix=FAIL %s
+// RUN: not --crash %t h 2>&1 | FileCheck --check-prefix=FAIL %s
+
+// RUN: %clangxx -o %t %s
+// RUN: %t a 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t b 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t c 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t d 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t e 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t f 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t g 2>&1 | FileCheck --check-prefix=PASS %s
+// RUN: %t h 2>&1 | FileCheck --check-prefix=PASS %s
+
+// Tests that the CFI enforcement detects bad casts.
+
+#include <stdio.h>
+#include <utility>
+#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(int argc, char **argv) {
+#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);
+
+  // FAIL: 1
+  // PASS: 1
+  fprintf(stderr, "1\n");
+
+  A a;
+  switch (argv[1][0]) {
+    case 'a':
+      static_cast<B *>(&a); // UB
+      break;
+    case 'b':
+      static_cast<B &>(a); // UB
+      break;
+    case 'c':
+      static_cast<B &&>(a); // UB
+      break;
+    case 'd':
+      static_cast<C *>(&a); // UB, strict only
+      break;
+    case 'e':
+      static_cast<C &>(a); // UB, strict only
+      break;
+    case 'f':
+      static_cast<C &&>(a); // UB, strict only
+      break;
+    case 'g':
+      static_cast<B *>(static_cast<void *>(&a)); // Non-UB bad cast
+      break;
+    case 'h':
+      static_cast<C *>(static_cast<void *>(&a)); // Non-UB bad cast, strict only
+      break;
+  }
+
+  // FAIL-NOT: 2
+  // PASS: 2
+  fprintf(stderr, "2\n");
+}