mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
synced 2024-11-27 06:00:59 +00:00
108 lines
3.1 KiB
C++
108 lines
3.1 KiB
C++
/*
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* Copyright (C) 2016 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 "CatchScope.h"
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#include "VM.h"
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namespace JSC {
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struct VMEntryFrame;
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class SuspendExceptionScope {
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public:
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SuspendExceptionScope(VM* vm)
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: m_vm(vm)
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{
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auto scope = DECLARE_CATCH_SCOPE(*vm);
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oldException = scope.exception();
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scope.clearException();
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}
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~SuspendExceptionScope()
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{
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m_vm->restorePreviousException(oldException);
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}
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private:
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Exception* oldException;
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VM* m_vm;
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};
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class TopCallFrameSetter {
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public:
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TopCallFrameSetter(VM& currentVM, CallFrame* callFrame)
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: vm(currentVM)
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, oldCallFrame(currentVM.topCallFrame)
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{
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currentVM.topCallFrame = callFrame;
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}
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~TopCallFrameSetter()
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{
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vm.topCallFrame = oldCallFrame;
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}
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private:
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VM& vm;
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CallFrame* oldCallFrame;
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};
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class NativeCallFrameTracer {
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public:
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ALWAYS_INLINE NativeCallFrameTracer(VM* vm, CallFrame* callFrame)
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{
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ASSERT(vm);
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ASSERT(callFrame);
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ASSERT(reinterpret_cast<void*>(callFrame) < reinterpret_cast<void*>(vm->topVMEntryFrame));
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vm->topCallFrame = callFrame;
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}
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};
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class NativeCallFrameTracerWithRestore {
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public:
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ALWAYS_INLINE NativeCallFrameTracerWithRestore(VM* vm, VMEntryFrame* vmEntryFrame, CallFrame* callFrame)
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: m_vm(vm)
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{
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ASSERT(vm);
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ASSERT(callFrame);
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m_savedTopVMEntryFrame = vm->topVMEntryFrame;
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m_savedTopCallFrame = vm->topCallFrame;
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vm->topVMEntryFrame = vmEntryFrame;
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vm->topCallFrame = callFrame;
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}
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ALWAYS_INLINE ~NativeCallFrameTracerWithRestore()
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{
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m_vm->topVMEntryFrame = m_savedTopVMEntryFrame;
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m_vm->topCallFrame = m_savedTopCallFrame;
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}
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private:
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VM* m_vm;
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VMEntryFrame* m_savedTopVMEntryFrame;
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CallFrame* m_savedTopCallFrame;
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};
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}
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