1/*
2 * Copyright (C) 2011-2019 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 "JSDestructibleObject.h"
29
30namespace JSC {
31
32class JSProxy : public JSDestructibleObject {
33public:
34 using Base = JSDestructibleObject;
35 static constexpr unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot | OverridesGetPropertyNames | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero;
36
37 static JSProxy* create(VM& vm, Structure* structure, JSObject* target)
38 {
39 JSProxy* proxy = new (NotNull, allocateCell<JSProxy>(vm.heap)) JSProxy(vm, structure);
40 proxy->finishCreation(vm, target);
41 return proxy;
42 }
43
44 static JSProxy* create(VM& vm, Structure* structure)
45 {
46 JSProxy* proxy = new (NotNull, allocateCell<JSProxy>(vm.heap)) JSProxy(vm, structure);
47 proxy->finishCreation(vm);
48 return proxy;
49 }
50
51 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype, JSType proxyType)
52 {
53 ASSERT(proxyType == ImpureProxyType || proxyType == PureForwardingProxyType);
54 return Structure::create(vm, globalObject, prototype, TypeInfo(proxyType, StructureFlags), info());
55 }
56
57 DECLARE_EXPORT_INFO;
58
59 JSObject* target() const { return m_target.get(); }
60 static ptrdiff_t targetOffset() { return OBJECT_OFFSETOF(JSProxy, m_target); }
61
62 JS_EXPORT_PRIVATE void setTarget(VM&, JSGlobalObject*);
63
64protected:
65 JSProxy(VM& vm, Structure* structure)
66 : Base(vm, structure)
67 {
68 }
69
70 void finishCreation(VM& vm)
71 {
72 Base::finishCreation(vm);
73 }
74
75 void finishCreation(VM& vm, JSObject* target)
76 {
77 Base::finishCreation(vm);
78 m_target.set(vm, this, target);
79 }
80
81 JS_EXPORT_PRIVATE static void visitChildren(JSCell*, SlotVisitor&);
82
83 JS_EXPORT_PRIVATE static String className(const JSObject*, VM&);
84 JS_EXPORT_PRIVATE static String toStringName(const JSObject*, JSGlobalObject*);
85 JS_EXPORT_PRIVATE static bool getOwnPropertySlot(JSObject*, JSGlobalObject*, PropertyName, PropertySlot&);
86 JS_EXPORT_PRIVATE static bool getOwnPropertySlotByIndex(JSObject*, JSGlobalObject*, unsigned, PropertySlot&);
87 JS_EXPORT_PRIVATE static bool put(JSCell*, JSGlobalObject*, PropertyName, JSValue, PutPropertySlot&);
88 JS_EXPORT_PRIVATE static bool putByIndex(JSCell*, JSGlobalObject*, unsigned, JSValue, bool shouldThrow);
89 JS_EXPORT_PRIVATE static bool deleteProperty(JSCell*, JSGlobalObject*, PropertyName);
90 JS_EXPORT_PRIVATE static bool deletePropertyByIndex(JSCell*, JSGlobalObject*, unsigned);
91 JS_EXPORT_PRIVATE static void getOwnPropertyNames(JSObject*, JSGlobalObject*, PropertyNameArray&, EnumerationMode);
92 JS_EXPORT_PRIVATE static void getPropertyNames(JSObject*, JSGlobalObject*, PropertyNameArray&, EnumerationMode);
93 JS_EXPORT_PRIVATE static uint32_t getEnumerableLength(JSGlobalObject*, JSObject*);
94 JS_EXPORT_PRIVATE static void getStructurePropertyNames(JSObject*, JSGlobalObject*, PropertyNameArray&, EnumerationMode);
95 JS_EXPORT_PRIVATE static void getGenericPropertyNames(JSObject*, JSGlobalObject*, PropertyNameArray&, EnumerationMode);
96 JS_EXPORT_PRIVATE static bool defineOwnProperty(JSObject*, JSGlobalObject*, PropertyName, const PropertyDescriptor&, bool shouldThrow);
97 JS_EXPORT_PRIVATE static bool setPrototype(JSObject*, JSGlobalObject*, JSValue, bool shouldThrowIfCantSet);
98 JS_EXPORT_PRIVATE static JSValue getPrototype(JSObject*, JSGlobalObject*);
99 JS_EXPORT_PRIVATE static bool isExtensible(JSObject*, JSGlobalObject*);
100 JS_EXPORT_PRIVATE static bool preventExtensions(JSObject*, JSGlobalObject*);
101
102private:
103 WriteBarrier<JSObject> m_target;
104};
105
106} // namespace JSC
107