1/*
2 * Copyright (C) 2012-2016 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 "UnlinkedGlobalCodeBlock.h"
29
30namespace JSC {
31
32class CachedEvalCodeBlock;
33
34class UnlinkedEvalCodeBlock final : public UnlinkedGlobalCodeBlock {
35public:
36 typedef UnlinkedGlobalCodeBlock Base;
37 static const unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
38
39 static UnlinkedEvalCodeBlock* create(VM* vm, const ExecutableInfo& info, OptionSet<CodeGenerationMode> codeGenerationMode)
40 {
41 UnlinkedEvalCodeBlock* instance = new (NotNull, allocateCell<UnlinkedEvalCodeBlock>(vm->heap)) UnlinkedEvalCodeBlock(vm, vm->unlinkedEvalCodeBlockStructure.get(), info, codeGenerationMode);
42 instance->finishCreation(*vm);
43 return instance;
44 }
45
46 static void destroy(JSCell*);
47
48 const Identifier& variable(unsigned index) { return m_variables[index]; }
49 unsigned numVariables() { return m_variables.size(); }
50 void adoptVariables(Vector<Identifier, 0, UnsafeVectorOverflow>& variables)
51 {
52 ASSERT(m_variables.isEmpty());
53 m_variables.swap(variables);
54 }
55
56 const Identifier& functionHoistingCandidate(unsigned index) { return m_functionHoistingCandidates[index]; }
57 unsigned numFunctionHoistingCandidates() { return m_functionHoistingCandidates.size(); }
58 void adoptFunctionHoistingCandidates(Vector<Identifier, 0, UnsafeVectorOverflow>&& functionHoistingCandidates)
59 {
60 ASSERT(m_functionHoistingCandidates.isEmpty());
61 m_functionHoistingCandidates = WTFMove(functionHoistingCandidates);
62 }
63private:
64 friend CachedEvalCodeBlock;
65
66 UnlinkedEvalCodeBlock(VM* vm, Structure* structure, const ExecutableInfo& info, OptionSet<CodeGenerationMode> codeGenerationMode)
67 : Base(vm, structure, EvalCode, info, codeGenerationMode)
68 {
69 }
70
71 UnlinkedEvalCodeBlock(Decoder&, const CachedEvalCodeBlock&);
72
73 Vector<Identifier, 0, UnsafeVectorOverflow> m_variables;
74 Vector<Identifier, 0, UnsafeVectorOverflow> m_functionHoistingCandidates;
75
76public:
77 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto)
78 {
79 return Structure::create(vm, globalObject, proto, TypeInfo(UnlinkedEvalCodeBlockType, StructureFlags), info());
80 }
81
82 DECLARE_INFO;
83};
84
85}
86