1/*
2 * Copyright (C) 2014-2018 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 "CallLinkStatus.h"
29#include "ObjectPropertyConditionSet.h"
30#include "PropertyOffset.h"
31#include "StructureSet.h"
32
33namespace JSC {
34namespace DOMJIT {
35class GetterSetter;
36}
37
38class CallLinkStatus;
39class GetByIdStatus;
40struct DumpContext;
41
42class GetByIdVariant {
43public:
44 GetByIdVariant(
45 const StructureSet& structureSet = StructureSet(), PropertyOffset offset = invalidOffset,
46 const ObjectPropertyConditionSet& = ObjectPropertyConditionSet(),
47 std::unique_ptr<CallLinkStatus> = nullptr,
48 JSFunction* = nullptr,
49 FunctionPtr<OperationPtrTag> customAccessorGetter = nullptr,
50 Optional<DOMAttributeAnnotation> = WTF::nullopt);
51
52 ~GetByIdVariant();
53
54 GetByIdVariant(const GetByIdVariant&);
55 GetByIdVariant& operator=(const GetByIdVariant&);
56
57 bool isSet() const { return !!m_structureSet.size(); }
58 explicit operator bool() const { return isSet(); }
59 const StructureSet& structureSet() const { return m_structureSet; }
60 StructureSet& structureSet() { return m_structureSet; }
61
62 // A non-empty condition set means that this is a prototype load.
63 const ObjectPropertyConditionSet& conditionSet() const { return m_conditionSet; }
64
65 PropertyOffset offset() const { return m_offset; }
66 CallLinkStatus* callLinkStatus() const { return m_callLinkStatus.get(); }
67 JSFunction* intrinsicFunction() const { return m_intrinsicFunction; }
68 Intrinsic intrinsic() const { return m_intrinsicFunction ? m_intrinsicFunction->intrinsic() : NoIntrinsic; }
69 FunctionPtr<OperationPtrTag> customAccessorGetter() const { return m_customAccessorGetter; }
70 Optional<DOMAttributeAnnotation> domAttribute() const { return m_domAttribute; }
71
72 bool isPropertyUnset() const { return offset() == invalidOffset; }
73
74 bool attemptToMerge(const GetByIdVariant& other);
75
76 void markIfCheap(SlotVisitor&);
77 bool finalize(VM&);
78
79 void dump(PrintStream&) const;
80 void dumpInContext(PrintStream&, DumpContext*) const;
81
82private:
83 friend class GetByIdStatus;
84
85 bool canMergeIntrinsicStructures(const GetByIdVariant&) const;
86
87 StructureSet m_structureSet;
88 ObjectPropertyConditionSet m_conditionSet;
89 PropertyOffset m_offset;
90 std::unique_ptr<CallLinkStatus> m_callLinkStatus;
91 JSFunction* m_intrinsicFunction;
92 FunctionPtr<OperationPtrTag> m_customAccessorGetter;
93 Optional<DOMAttributeAnnotation> m_domAttribute;
94};
95
96} // namespace JSC
97