llvm-project/libunwind/test/alignment.compile.pass.cpp

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C++

// -*- C++ -*-
//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// The Itanium ABI requires that _Unwind_Exception objects are "double-word
// aligned".
#include <unwind.h>
// EHABI : 8-byte aligned
// itanium: largest supported alignment for the system
#if defined(_LIBUNWIND_ARM_EHABI)
static_assert(alignof(_Unwind_Control_Block) == 8,
"_Unwind_Control_Block must be double-word aligned");
#else
struct MaxAligned {} __attribute__((__aligned__));
static_assert(alignof(_Unwind_Exception) == alignof(MaxAligned),
"_Unwind_Exception must be maximally aligned");
#endif