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52 lines
1.5 KiB
52 lines
1.5 KiB
4 months ago
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: libcxxabi-no-exceptions
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// UNSUPPORTED: c++98, c++03
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// The system unwind.h on OS X provides an incorrectly aligned _Unwind_Exception
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// type. That causes these tests to fail. This XFAIL is my best attempt at
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// working around this failure.
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// XFAIL: darwin && libcxxabi-has-system-unwinder
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// Test that the address of the exception object is properly aligned as required
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// by the relevant ABI
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#include <cstdint>
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#include <cassert>
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#include <__cxxabi_config.h>
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#include <unwind.h>
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struct __attribute__((aligned)) AlignedType {};
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// EHABI : 8-byte aligned
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// Itanium: Largest supported alignment for the system
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#if defined(_LIBCXXABI_ARM_EHABI)
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# define EXPECTED_ALIGNMENT 8
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#else
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# define EXPECTED_ALIGNMENT alignof(AlignedType)
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#endif
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static_assert(alignof(_Unwind_Exception) == EXPECTED_ALIGNMENT,
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"_Unwind_Exception is incorrectly aligned. This test is expected to fail");
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struct MinAligned { };
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static_assert(alignof(MinAligned) == 1 && sizeof(MinAligned) == 1, "");
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int main() {
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for (int i=0; i < 10; ++i) {
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try {
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throw MinAligned{};
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} catch (MinAligned const& ref) {
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assert(reinterpret_cast<uintptr_t>(&ref) % EXPECTED_ALIGNMENT == 0);
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}
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}
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}
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