| //===----------------------------------------------------------------------===// |
| // |
| // 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: no-exceptions |
| // UNSUPPORTED: c++03 |
| |
| // The <unwind.h> header provided in the SDK of older Xcodes used to provide |
| // an incorrectly aligned _Unwind_Exception type on non-ARM. That causes these |
| // tests to fail when compiling against such a SDK, or when running against a |
| // system libc++abi that was compiled with an incorrect definition of _Unwind_Exception. |
| // XFAIL: apple-clang-12.0.0 && !target={{arm.*}} |
| // XFAIL: use_system_cxx_lib && target={{.+}}-apple-macosx10.{{9|10|11|12}} |
| |
| // 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(int, char**) { |
| for (int i=0; i < 10; ++i) { |
| try { |
| throw MinAligned{}; |
| } catch (MinAligned const& ref) { |
| assert(reinterpret_cast<uintptr_t>(&ref) % EXPECTED_ALIGNMENT == 0); |
| } |
| } |
| |
| return 0; |
| } |