1 | /* |
2 | * Copyright (C) 2008, 2009 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 | * |
8 | * 1. Redistributions of source code must retain the above copyright |
9 | * notice, this list of conditions and the following disclaimer. |
10 | * 2. Redistributions in binary form must reproduce the above copyright |
11 | * notice, this list of conditions and the following disclaimer in the |
12 | * documentation and/or other materials provided with the distribution. |
13 | * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
14 | * its contributors may be used to endorse or promote products derived |
15 | * from this software without specific prior written permission. |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
18 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
19 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
20 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
21 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
22 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
23 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
24 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
28 | |
29 | #ifndef JSActivation_h |
30 | #define JSActivation_h |
31 | |
32 | #include "CodeBlock.h" |
33 | #include "JSVariableObject.h" |
34 | #include "RegisterFile.h" |
35 | #include "SymbolTable.h" |
36 | #include "Nodes.h" |
37 | |
38 | namespace JSC { |
39 | |
40 | class Arguments; |
41 | class Register; |
42 | |
43 | class JSActivation : public JSVariableObject { |
44 | typedef JSVariableObject Base; |
45 | public: |
46 | JSActivation(CallFrame*, NonNullPassRefPtr<FunctionExecutable>); |
47 | virtual ~JSActivation(); |
48 | |
49 | virtual void markChildren(MarkStack&); |
50 | |
51 | virtual bool isDynamicScope() const; |
52 | |
53 | virtual bool isActivationObject() const { return true; } |
54 | |
55 | virtual bool getOwnPropertySlot(ExecState*, const Identifier&, PropertySlot&); |
56 | |
57 | virtual void put(ExecState*, const Identifier&, JSValue, PutPropertySlot&); |
58 | |
59 | virtual void putWithAttributes(ExecState*, const Identifier&, JSValue, unsigned attributes); |
60 | virtual bool deleteProperty(ExecState*, const Identifier& propertyName); |
61 | |
62 | virtual JSObject* toThisObject(ExecState*) const; |
63 | |
64 | void copyRegisters(Arguments* arguments); |
65 | |
66 | virtual const ClassInfo* classInfo() const { return &info; } |
67 | static const ClassInfo info; |
68 | |
69 | static PassRefPtr<Structure> createStructure(JSValue proto) { return Structure::create(prototype: proto, typeInfo: TypeInfo(ObjectType, StructureFlags)); } |
70 | |
71 | protected: |
72 | static const unsigned StructureFlags = OverridesGetOwnPropertySlot | NeedsThisConversion | OverridesMarkChildren | OverridesGetPropertyNames | JSVariableObject::StructureFlags; |
73 | |
74 | private: |
75 | struct JSActivationData : public JSVariableObjectData { |
76 | JSActivationData(NonNullPassRefPtr<FunctionExecutable> _functionExecutable, Register* registers) |
77 | : JSVariableObjectData(_functionExecutable->generatedBytecode().symbolTable(), registers) |
78 | , functionExecutable(_functionExecutable) |
79 | { |
80 | // We have to manually ref and deref the symbol table as JSVariableObjectData |
81 | // doesn't know about SharedSymbolTable |
82 | functionExecutable->generatedBytecode().sharedSymbolTable()->ref(); |
83 | } |
84 | ~JSActivationData() |
85 | { |
86 | static_cast<SharedSymbolTable*>(symbolTable)->deref(); |
87 | } |
88 | |
89 | RefPtr<FunctionExecutable> functionExecutable; |
90 | }; |
91 | |
92 | static JSValue argumentsGetter(ExecState*, const Identifier&, const PropertySlot&); |
93 | NEVER_INLINE PropertySlot::GetValueFunc getArgumentsGetter(); |
94 | |
95 | JSActivationData* d() const { return static_cast<JSActivationData*>(JSVariableObject::d); } |
96 | }; |
97 | |
98 | JSActivation* asActivation(JSValue); |
99 | |
100 | inline JSActivation* asActivation(JSValue value) |
101 | { |
102 | ASSERT(asObject(value)->inherits(&JSActivation::info)); |
103 | return static_cast<JSActivation*>(asObject(value)); |
104 | } |
105 | |
106 | } // namespace JSC |
107 | |
108 | #endif // JSActivation_h |
109 | |