EvalExecutable.h   [plain text]

/*
 * Copyright (C) 2009-2017 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 1. Redistributions of source code must retain the above copyright
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 *    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
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#pragma once

#include "ExecutableToCodeBlockEdge.h"
#include "ScriptExecutable.h"
#include "UnlinkedEvalCodeBlock.h"

namespace JSC {

class EvalExecutable : public ScriptExecutable {
    friend class LLIntOffsetsExtractor;
public:
    typedef ScriptExecutable Base;
    static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;

    static void destroy(JSCell*);
    
    EvalCodeBlock* codeBlock()
    {
        return bitwise_cast<EvalCodeBlock*>(ExecutableToCodeBlockEdge::unwrap(m_evalCodeBlock.get()));
    }

    Ref<JITCode> generatedJITCode()
    {
        return generatedJITCodeForCall();
    }

    static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto)
    {
        return Structure::create(vm, globalObject, proto, TypeInfo(EvalExecutableType, StructureFlags), info());
    }

    DECLARE_INFO;

    ExecutableInfo executableInfo() const { return ExecutableInfo(usesEval(), isStrictMode(), false, false, ConstructorKind::None, JSParserScriptMode::Classic, SuperBinding::NotNeeded, SourceParseMode::ProgramMode, derivedContextType(), isArrowFunctionContext(), false, evalContextType()); }

    unsigned numVariables() { return m_unlinkedEvalCodeBlock->numVariables(); }
    unsigned numFunctionHoistingCandidates() { return m_unlinkedEvalCodeBlock->numFunctionHoistingCandidates(); }
    unsigned numTopLevelFunctionDecls() { return m_unlinkedEvalCodeBlock->numberOfFunctionDecls(); }
    bool allowDirectEvalCache() const { return m_unlinkedEvalCodeBlock->allowDirectEvalCache(); }

protected:
    friend class ExecutableBase;
    friend class ScriptExecutable;

    using Base::finishCreation;
    EvalExecutable(ExecState*, const SourceCode&, bool inStrictContext, DerivedContextType, bool isArrowFunctionContext, EvalContextType);

    static void visitChildren(JSCell*, SlotVisitor&);

    WriteBarrier<ExecutableToCodeBlockEdge> m_evalCodeBlock;
    WriteBarrier<UnlinkedEvalCodeBlock> m_unlinkedEvalCodeBlock;
};

} // namespace JSC