| //===----------------------------------------------------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is dual licensed under the MIT and the University of Illinois Open |
| // Source Licenses. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // 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 <unwind.h> |
| |
| struct __attribute__((aligned)) AlignedType {}; |
| |
| // EHABI : 8-byte aligned |
| // Itanium: Largest supported alignment for the system |
| #if defined(_LIBUNWIND_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); |
| } |
| } |
| } |