libunwind/test/alignment.pass.cpp

   1 // -*- C++ -*-
   2 //===----------------------------------------------------------------------===//
   3 //
   4 //                     The LLVM Compiler Infrastructure
   5 //
   6 // This file is dual licensed under the MIT and the University of Illinois Open
   7 // Source Licenses. See LICENSE.TXT for details.
   8 //
   9 //===----------------------------------------------------------------------===//
  10
  11 // The Itanium ABI requires that _Unwind_Exception objects are "double-word
  12 // aligned".
  13
  14 #include <unwind.h>
  15
  16 // EHABI  : 8-byte aligned
  17 // itanium: largest supported alignment for the system
  18 #if defined(_LIBUNWIND_ARM_EHABI)
  19 static_assert(alignof(_Unwind_Control_Block) == 8,
  20               "_Unwind_Control_Block must be double-word aligned");
  21 #else
  22 struct MaxAligned {} __attribute__((__aligned__));
  23 static_assert(alignof(_Unwind_Exception) == alignof(MaxAligned),
  24               "_Unwind_Exception must be maximally aligned");
  25 #endif
  26
  27 int main()
  28 {
  29 }