/* * Copyright (C) 2016 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #pragma once #include "VM.h" namespace JSC { class Exception; #if ENABLE(EXCEPTION_SCOPE_VERIFICATION) class ExceptionScope { public: VM& vm() const { return m_vm; } unsigned recursionDepth() const { return m_recursionDepth; } Exception* exception() { return m_vm.exception(); } protected: ExceptionScope(VM&, ExceptionEventLocation); ExceptionScope(const ExceptionScope&) = delete; ExceptionScope(ExceptionScope&&) = default; ~ExceptionScope(); VM& m_vm; ExceptionScope* m_previousScope; ExceptionEventLocation m_location; unsigned m_recursionDepth; }; #else // not ENABLE(EXCEPTION_SCOPE_VERIFICATION) class ExceptionScope { public: ALWAYS_INLINE VM& vm() const { return m_vm; } ALWAYS_INLINE Exception* exception() { return m_vm.exception(); } protected: ALWAYS_INLINE ExceptionScope(VM& vm) : m_vm(vm) { } ExceptionScope(const ExceptionScope&) = delete; ExceptionScope(ExceptionScope&&) = default; VM& m_vm; }; #endif // ENABLE(EXCEPTION_SCOPE_VERIFICATION) #define RETURN_IF_EXCEPTION(scope__, value__) do { \ if (UNLIKELY((scope__).exception())) \ return value__; \ } while (false) } // namespace JSC