libunwind/test/alignment.compile.pass.cpp

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   5 // See https://llvm.org/LICENSE.txt for license information.
   6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 // The Itanium ABI requires that _Unwind_Exception objects are "double-word
  11 // aligned".
  12
  13 #include <unwind.h>
  14
  15 // EHABI  : 8-byte aligned
  16 // itanium: largest supported alignment for the system
  17 #if defined(_LIBUNWIND_ARM_EHABI)
  18 static_assert(alignof(_Unwind_Control_Block) == 8,
  19               "_Unwind_Control_Block must be double-word aligned");
  20 #else
  21 struct MaxAligned {} __attribute__((__aligned__));
  22 static_assert(alignof(_Unwind_Exception) == alignof(MaxAligned),
  23               "_Unwind_Exception must be maximally aligned");
  24 #endif