mirror of
https://github.com/darlinghq/darling-JavaScriptCore.git
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92 lines
2.9 KiB
C++
92 lines
2.9 KiB
C++
/*
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* Copyright (C) 2018-2019 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 "ConcurrentJSLock.h"
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#include "IsoSubspace.h"
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#include "JSCast.h"
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#include "VM.h"
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namespace JSC {
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class CodeBlock;
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class LLIntOffsetsExtractor;
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class ExecutableToCodeBlockEdge final : public JSCell {
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public:
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typedef JSCell Base;
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static constexpr unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
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template<typename CellType, SubspaceAccess>
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static IsoSubspace* subspaceFor(VM& vm)
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{
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return &vm.executableToCodeBlockEdgeSpace;
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}
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static Structure* createStructure(VM&, JSGlobalObject*, JSValue prototype);
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static ExecutableToCodeBlockEdge* create(VM&, CodeBlock*);
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DECLARE_INFO;
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CodeBlock* codeBlock() const { return m_codeBlock.get(); }
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static void visitChildren(JSCell*, SlotVisitor&);
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static void visitOutputConstraints(JSCell*, SlotVisitor&);
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void finalizeUnconditionally(VM&);
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static CodeBlock* unwrap(ExecutableToCodeBlockEdge* edge)
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{
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if (!edge)
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return nullptr;
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return edge->codeBlock();
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}
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static CodeBlock* deactivateAndUnwrap(ExecutableToCodeBlockEdge* edge);
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static ExecutableToCodeBlockEdge* wrap(CodeBlock* codeBlock);
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static ExecutableToCodeBlockEdge* wrapAndActivate(CodeBlock* codeBlock);
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private:
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friend class LLIntOffsetsExtractor;
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ExecutableToCodeBlockEdge(VM&, CodeBlock*);
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void finishCreation(VM&);
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void activate();
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void deactivate();
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bool isActive() const;
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void runConstraint(const ConcurrentJSLocker&, VM&, SlotVisitor&);
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WriteBarrier<CodeBlock> m_codeBlock;
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};
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} // namespace JSC
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