1/*
2 * Copyright (C) 2009-2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "ExecutableToCodeBlockEdge.h"
29#include "GlobalExecutable.h"
30#include "UnlinkedEvalCodeBlock.h"
31
32namespace JSC {
33
34class EvalExecutable : public GlobalExecutable {
35 friend class LLIntOffsetsExtractor;
36public:
37 using Base = GlobalExecutable;
38 static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
39
40 static void destroy(JSCell*);
41
42 EvalCodeBlock* codeBlock()
43 {
44 return bitwise_cast<EvalCodeBlock*>(ExecutableToCodeBlockEdge::unwrap(m_evalCodeBlock.get()));
45 }
46
47 Ref<JITCode> generatedJITCode()
48 {
49 return generatedJITCodeForCall();
50 }
51
52 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto)
53 {
54 return Structure::create(vm, globalObject, proto, TypeInfo(EvalExecutableType, StructureFlags), info());
55 }
56
57 template<typename CellType, SubspaceAccess mode>
58 static IsoSubspace* subspaceFor(VM& vm)
59 {
60 return vm.evalExecutableSpace<mode>();
61 }
62
63 DECLARE_INFO;
64
65 ExecutableInfo executableInfo() const { return ExecutableInfo(usesEval(), isStrictMode(), false, false, ConstructorKind::None, JSParserScriptMode::Classic, SuperBinding::NotNeeded, SourceParseMode::ProgramMode, derivedContextType(), isArrowFunctionContext(), false, evalContextType()); }
66
67 unsigned numVariables() { return m_unlinkedEvalCodeBlock->numVariables(); }
68 unsigned numFunctionHoistingCandidates() { return m_unlinkedEvalCodeBlock->numFunctionHoistingCandidates(); }
69 unsigned numTopLevelFunctionDecls() { return m_unlinkedEvalCodeBlock->numberOfFunctionDecls(); }
70 bool allowDirectEvalCache() const { return m_unlinkedEvalCodeBlock->allowDirectEvalCache(); }
71
72 TemplateObjectMap& ensureTemplateObjectMap(VM&);
73
74protected:
75 friend class ExecutableBase;
76 friend class ScriptExecutable;
77
78 using Base::finishCreation;
79 EvalExecutable(ExecState*, const SourceCode&, bool inStrictContext, DerivedContextType, bool isArrowFunctionContext, EvalContextType);
80
81 static void visitChildren(JSCell*, SlotVisitor&);
82
83 WriteBarrier<ExecutableToCodeBlockEdge> m_evalCodeBlock;
84 WriteBarrier<UnlinkedEvalCodeBlock> m_unlinkedEvalCodeBlock;
85 std::unique_ptr<TemplateObjectMap> m_templateObjectMap;
86};
87
88} // namespace JSC
89