[libcxxabi] Add a test for invalid assumptions on the alignment of exceptions
rdar://problem/49864414
git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@361039 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/exception_object_alignment.2.pass.cpp b/test/exception_object_alignment.2.pass.cpp
new file mode 100644
index 0000000..33f0f9e
--- /dev/null
+++ b/test/exception_object_alignment.2.pass.cpp
@@ -0,0 +1,34 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: libcxxabi-no-exceptions
+
+// This test checks that the compiler does not make incorrect assumptions
+// about the alignment of the exception (only in that specific case, of
+// course).
+//
+// There was a bug where Clang would emit a call to memset assuming a 16-byte
+// aligned exception even when back-deploying to older Darwin systems where
+// exceptions are 8-byte aligned, which caused a segfault on those systems.
+
+struct exception {
+ exception() : x(0) { }
+ virtual ~exception() { }
+ int x;
+};
+
+struct foo : exception { };
+
+int main() {
+ try {
+ throw foo();
+ } catch (...) {
+
+ }
+ return 0;
+}
