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//===----------------------------------------------------------------------===//
//
// 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
// UNSUPPORTED: c++98, c++03
// The system unwind.h on OS X provides an incorrectly aligned _Unwind_Exception
// type. That causes these tests to fail. This XFAIL is my best attempt at
// working around this failure.
// XFAIL: darwin && libcxxabi-has-system-unwinder
// Test that the address of the exception object is properly aligned as required
// by the relevant ABI
#include <cstdint>
#include <cassert>
#include <__cxxabi_config.h>
#include <unwind.h>
struct __attribute__((aligned)) AlignedType {};
// EHABI : 8-byte aligned
// Itanium: Largest supported alignment for the system
#if defined(_LIBCXXABI_ARM_EHABI)
# define EXPECTED_ALIGNMENT 8
#else
# define EXPECTED_ALIGNMENT alignof(AlignedType)
#endif
static_assert(alignof(_Unwind_Exception) == EXPECTED_ALIGNMENT,
"_Unwind_Exception is incorrectly aligned. This test is expected to fail");
struct MinAligned { };
static_assert(alignof(MinAligned) == 1 && sizeof(MinAligned) == 1, "");
int main() {
for (int i=0; i < 10; ++i) {
try {
throw MinAligned{};
} catch (MinAligned const& ref) {
assert(reinterpret_cast<uintptr_t>(&ref) % EXPECTED_ALIGNMENT == 0);
}
}
}
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