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ed61d6a466
The use_system_cxx_lib Lit feature was only used for back-deployment testing. However, one immense hole in that setup was that we didn't have a proper way to test Apple's own libc++ outside of back-deployment, which was embodied by the fact that we needed to define _LIBCPP_DISABLE_AVAILABILITY when testing (see change in libcxx/utils/libcxx/test/params.py). This led to the apple-system testing configuration not checking for availability markup, which is obviously quite bad since the library we ship actually has availability markup. Using stdlib=<VENDOR>-libc++ instead to encode back-deployment restrictions on tests is simpler and it makes it possible to naturally support tests such as availability markup checking even in the tip-of-trunk Apple-libc++ configuration. Differential Revision: https://reviews.llvm.org/D146366
40 lines
1.3 KiB
C++
40 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: no-exceptions
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// The situation for the alignment of exception objects is badly messed up
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// before macOS 10.14. The test fails on macOS 10.9 to 10.12, passes on macOS
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// 10.13 (no investigation done), and passes afterwards. Just mark all the OSes
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// before 10.14 as unsupported.
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// UNSUPPORTED: stdlib=apple-libc++ && target={{.+}}-apple-macosx10.{{9|10|11|12|13}}
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// Check that the pointer __cxa_allocate_exception returns is aligned to the
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// default alignment for the target architecture.
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#include <cassert>
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#include <cstdint>
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#include <cxxabi.h>
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#include <type_traits>
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#include <__cxxabi_config.h>
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struct S {
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int a[4];
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} __attribute__((aligned));
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int main(int, char**) {
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#if !defined(_LIBCXXABI_ARM_EHABI)
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void *p = __cxxabiv1::__cxa_allocate_exception(16);
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auto i = reinterpret_cast<uintptr_t>(p);
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auto a = std::alignment_of<S>::value;
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assert(i % a == 0);
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__cxxabiv1::__cxa_free_exception(p);
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#endif
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return 0;
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}
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