1 files changed, 26 insertions, 0 deletions
diff --git a/test/asan/TestCases/Windows/wrong_downcast_on_stack.cc b/test/asan/TestCases/Windows/wrong_downcast_on_stack.cc
new file mode 100644
index 0000000000000..2859ecc521d23
--- /dev/null
+++ b/test/asan/TestCases/Windows/wrong_downcast_on_stack.cc
@@ -0,0 +1,26 @@
+// RUN: %clang_cl_asan -O0 %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;
+  Child *c = (Child*)&p;  // Intentional error here!
+  c->extra_field = 42;
+// CHECK: AddressSanitizer: stack-buffer-overflow on address [[ADDR:0x[0-9a-f]+]]
+// CHECK: WRITE of size 4 at [[ADDR]] thread T0
+// CHECK-NEXT:  {{#0 0x[0-9a-f]* in main .*wrong_downcast_on_stack.cc}}:[[@LINE-3]]
+// CHECK: [[ADDR]] is located in stack of thread T0 at offset [[OFFSET:[0-9]+]] in frame
+// CHECK-NEXT:  {{#0 0x[0-9a-f]* in main }}
+// CHECK:  'p' <== Memory access at offset [[OFFSET]] overflows this variable
+  return 0;
+}
+