1/*
2 * Copyright (C) 2015 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 "AbstractModuleRecord.h"
29#include "JSDestructibleObject.h"
30
31namespace JSC {
32
33class JSModuleNamespaceObject final : public JSDestructibleObject {
34public:
35 typedef JSDestructibleObject Base;
36 static const unsigned StructureFlags = Base::StructureFlags | OverridesGetOwnPropertySlot | InterceptsGetOwnPropertySlotByIndexEvenWhenLengthIsNotZero | OverridesGetPropertyNames | GetOwnPropertySlotIsImpureForPropertyAbsence | IsImmutablePrototypeExoticObject;
37
38 static JSModuleNamespaceObject* create(ExecState* exec, JSGlobalObject* globalObject, Structure* structure, AbstractModuleRecord* moduleRecord, Vector<std::pair<Identifier, AbstractModuleRecord::Resolution>>&& resolutions)
39 {
40 VM& vm = exec->vm();
41 JSModuleNamespaceObject* object =
42 new (
43 NotNull,
44 allocateCell<JSModuleNamespaceObject>(vm.heap, JSModuleNamespaceObject::allocationSize(resolutions.size())))
45 JSModuleNamespaceObject(vm, structure);
46 object->finishCreation(exec, globalObject, moduleRecord, WTFMove(resolutions));
47 return object;
48 }
49
50 JS_EXPORT_PRIVATE static bool getOwnPropertySlot(JSObject*, ExecState*, PropertyName, PropertySlot&);
51 JS_EXPORT_PRIVATE static bool getOwnPropertySlotByIndex(JSObject*, ExecState*, unsigned propertyName, PropertySlot&);
52 JS_EXPORT_PRIVATE static bool put(JSCell*, ExecState*, PropertyName, JSValue, PutPropertySlot&);
53 JS_EXPORT_PRIVATE static bool putByIndex(JSCell*, ExecState*, unsigned propertyName, JSValue, bool shouldThrow);
54 JS_EXPORT_PRIVATE static bool deleteProperty(JSCell*, ExecState*, PropertyName);
55 JS_EXPORT_PRIVATE static void getOwnPropertyNames(JSObject*, ExecState*, PropertyNameArray&, EnumerationMode);
56 JS_EXPORT_PRIVATE static bool defineOwnProperty(JSObject*, ExecState*, PropertyName, const PropertyDescriptor&, bool shouldThrow);
57
58 DECLARE_EXPORT_INFO;
59
60 static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
61 {
62 return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
63 }
64
65 AbstractModuleRecord* moduleRecord() { return m_moduleRecord.get(); }
66
67protected:
68 JS_EXPORT_PRIVATE void finishCreation(ExecState*, JSGlobalObject*, AbstractModuleRecord*, Vector<std::pair<Identifier, AbstractModuleRecord::Resolution>>&&);
69 JS_EXPORT_PRIVATE JSModuleNamespaceObject(VM&, Structure*);
70
71private:
72 static void destroy(JSCell*);
73 static void visitChildren(JSCell*, SlotVisitor&);
74 bool getOwnPropertySlotCommon(ExecState*, PropertyName, PropertySlot&);
75
76 WriteBarrierBase<AbstractModuleRecord>& moduleRecordAt(unsigned offset)
77 {
78 return moduleRecords()[offset];
79 }
80
81 WriteBarrierBase<AbstractModuleRecord>* moduleRecords()
82 {
83 return bitwise_cast<WriteBarrierBase<AbstractModuleRecord>*>(bitwise_cast<char*>(this) + offsetOfModuleRecords());
84 }
85
86 static size_t offsetOfModuleRecords()
87 {
88 return WTF::roundUpToMultipleOf<sizeof(WriteBarrier<AbstractModuleRecord>)>(sizeof(JSModuleNamespaceObject));
89 }
90
91 static size_t allocationSize(Checked<size_t> moduleRecords)
92 {
93 return (offsetOfModuleRecords() + moduleRecords * sizeof(WriteBarrier<AbstractModuleRecord>)).unsafeGet();
94 }
95
96 struct ExportEntry {
97 Identifier localName;
98 unsigned moduleRecordOffset;
99 };
100
101 typedef HashMap<RefPtr<UniquedStringImpl>, ExportEntry, IdentifierRepHash, HashTraits<RefPtr<UniquedStringImpl>>> ExportMap;
102
103 ExportMap m_exports;
104 Vector<Identifier> m_names;
105 WriteBarrier<AbstractModuleRecord> m_moduleRecord;
106};
107
108} // namespace JSC
109