mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
/*
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* Copyright (C) 2016-2018 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "ExceptionScope.h"
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namespace JSC {
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#if ENABLE(EXCEPTION_SCOPE_VERIFICATION)
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// If a function can clear JS exceptions, it should declare a CatchScope at the
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// top of the function (as early as possible) using the DECLARE_CATCH_SCOPE macro.
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// Declaring a CatchScope in a function means that the function intends to clear
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// pending exceptions before returning to its caller.
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class CatchScope : public ExceptionScope {
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public:
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JS_EXPORT_PRIVATE CatchScope(VM&, ExceptionEventLocation);
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CatchScope(const CatchScope&) = delete;
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CatchScope(CatchScope&&) = default;
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JS_EXPORT_PRIVATE ~CatchScope();
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void clearException() { m_vm.clearException(); }
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};
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#define DECLARE_CATCH_SCOPE(vm__) \
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JSC::CatchScope((vm__), JSC::ExceptionEventLocation(EXCEPTION_SCOPE_POSITION_FOR_ASAN(vm__), __FUNCTION__, __FILE__, __LINE__))
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#else // not ENABLE(EXCEPTION_SCOPE_VERIFICATION)
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class CatchScope : public ExceptionScope {
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public:
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ALWAYS_INLINE CatchScope(VM& vm)
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: ExceptionScope(vm)
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{ }
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CatchScope(const CatchScope&) = delete;
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CatchScope(CatchScope&&) = default;
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ALWAYS_INLINE void clearException() { m_vm.clearException(); }
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};
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#define DECLARE_CATCH_SCOPE(vm__) \
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JSC::CatchScope((vm__))
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#endif // ENABLE(EXCEPTION_SCOPE_VERIFICATION)
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#define CLEAR_AND_RETURN_IF_EXCEPTION(scope__, value__) do { \
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if (UNLIKELY((scope__).exception())) { \
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(scope__).clearException(); \
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return value__; \
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} \
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} while (false)
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} // namespace JSC
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