1 files changed, 26 insertions, 0 deletions
diff --git a/compiler-rt/test/asan/TestCases/Windows/wrong_downcast_on_heap.cpp b/compiler-rt/test/asan/TestCases/Windows/wrong_downcast_on_heap.cpp
new file mode 100644
index 00000000000..b9627089436
--- /dev/null
+++ b/compiler-rt/test/asan/TestCases/Windows/wrong_downcast_on_heap.cpp
@@ -0,0 +1,26 @@
+// RUN: %clang_cl_asan -Od %s -Fe%t
+// RUN: not %run %t 2>&1 | FileCheck %s
+
+class Parent {
+ public:
+  int field;
+};
+
+class Child : public Parent {
+ public:
+  int extra_field;
+};
+
+int main(void) {
+  Parent *p = new Parent;
+  Child *c = (Child*)p;  // Intentional error here!
+  c->extra_field = 42;
+// CHECK: AddressSanitizer: heap-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
+// CHECK: WRITE of size 4 at [[ADDR]] thread T0
+// CHECK:   {{#0 0x[0-9a-f]* in main .*wrong_downcast_on_heap.cpp}}:[[@LINE-3]]
+// CHECK: [[ADDR]] is located 0 bytes to the right of 4-byte region
+// CHECK: allocated by thread T0 here:
+// CHECK:   #0 {{.*}} operator new
+  return 0;
+}
+