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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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2245 Name* name, | 2245 Name* name, |
2246 bool continue_search); | 2246 bool continue_search); |
2247 PropertyAttributes GetElementAttributeWithReceiver(JSReceiver* receiver, | 2247 PropertyAttributes GetElementAttributeWithReceiver(JSReceiver* receiver, |
2248 uint32_t index, | 2248 uint32_t index, |
2249 bool continue_search); | 2249 bool continue_search); |
2250 | 2250 |
2251 static void DefineAccessor(Handle<JSObject> object, | 2251 static void DefineAccessor(Handle<JSObject> object, |
2252 Handle<Name> name, | 2252 Handle<Name> name, |
2253 Handle<Object> getter, | 2253 Handle<Object> getter, |
2254 Handle<Object> setter, | 2254 Handle<Object> setter, |
2255 PropertyAttributes attributes); | 2255 PropertyAttributes attributes, |
| 2256 v8::AccessControl access_control = v8::DEFAULT); |
2256 | 2257 |
2257 MaybeObject* LookupAccessor(Name* name, AccessorComponent component); | 2258 MaybeObject* LookupAccessor(Name* name, AccessorComponent component); |
2258 | 2259 |
2259 MUST_USE_RESULT MaybeObject* DefineAccessor(AccessorInfo* info); | 2260 MUST_USE_RESULT MaybeObject* DefineAccessor(AccessorInfo* info); |
2260 | 2261 |
2261 // Used from Object::GetProperty(). | 2262 // Used from Object::GetProperty(). |
2262 MUST_USE_RESULT MaybeObject* GetPropertyWithFailedAccessCheck( | 2263 MUST_USE_RESULT MaybeObject* GetPropertyWithFailedAccessCheck( |
2263 Object* receiver, | 2264 Object* receiver, |
2264 LookupResult* result, | 2265 LookupResult* result, |
2265 Name* name, | 2266 Name* name, |
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2829 Object* structure, | 2830 Object* structure, |
2830 PropertyAttributes attributes); | 2831 PropertyAttributes attributes); |
2831 MUST_USE_RESULT MaybeObject* SetPropertyCallback( | 2832 MUST_USE_RESULT MaybeObject* SetPropertyCallback( |
2832 Name* name, | 2833 Name* name, |
2833 Object* structure, | 2834 Object* structure, |
2834 PropertyAttributes attributes); | 2835 PropertyAttributes attributes); |
2835 static void DefineElementAccessor(Handle<JSObject> object, | 2836 static void DefineElementAccessor(Handle<JSObject> object, |
2836 uint32_t index, | 2837 uint32_t index, |
2837 Handle<Object> getter, | 2838 Handle<Object> getter, |
2838 Handle<Object> setter, | 2839 Handle<Object> setter, |
2839 PropertyAttributes attributes); | 2840 PropertyAttributes attributes, |
| 2841 v8::AccessControl access_control); |
2840 static Handle<AccessorPair> CreateAccessorPairFor(Handle<JSObject> object, | 2842 static Handle<AccessorPair> CreateAccessorPairFor(Handle<JSObject> object, |
2841 Handle<Name> name); | 2843 Handle<Name> name); |
2842 static void DefinePropertyAccessor(Handle<JSObject> object, | 2844 static void DefinePropertyAccessor(Handle<JSObject> object, |
2843 Handle<Name> name, | 2845 Handle<Name> name, |
2844 Handle<Object> getter, | 2846 Handle<Object> getter, |
2845 Handle<Object> setter, | 2847 Handle<Object> setter, |
2846 PropertyAttributes attributes); | 2848 PropertyAttributes attributes, |
| 2849 v8::AccessControl access_control); |
2847 | 2850 |
2848 // Try to define a single accessor paying attention to map transitions. | 2851 // Try to define a single accessor paying attention to map transitions. |
2849 // Returns false if this was not possible and we have to use the slow case. | 2852 // Returns false if this was not possible and we have to use the slow case. |
2850 static bool DefineFastAccessor(Handle<JSObject> object, | 2853 static bool DefineFastAccessor(Handle<JSObject> object, |
2851 Handle<Name> name, | 2854 Handle<Name> name, |
2852 AccessorComponent component, | 2855 AccessorComponent component, |
2853 Handle<Object> accessor, | 2856 Handle<Object> accessor, |
2854 PropertyAttributes attributes); | 2857 PropertyAttributes attributes); |
2855 | 2858 |
2856 enum InitializeHiddenProperties { | 2859 enum InitializeHiddenProperties { |
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9682 DISALLOW_IMPLICIT_CONSTRUCTORS(ExecutableAccessorInfo); | 9685 DISALLOW_IMPLICIT_CONSTRUCTORS(ExecutableAccessorInfo); |
9683 }; | 9686 }; |
9684 | 9687 |
9685 | 9688 |
9686 // Support for JavaScript accessors: A pair of a getter and a setter. Each | 9689 // Support for JavaScript accessors: A pair of a getter and a setter. Each |
9687 // accessor can either be | 9690 // accessor can either be |
9688 // * a pointer to a JavaScript function or proxy: a real accessor | 9691 // * a pointer to a JavaScript function or proxy: a real accessor |
9689 // * undefined: considered an accessor by the spec, too, strangely enough | 9692 // * undefined: considered an accessor by the spec, too, strangely enough |
9690 // * the hole: an accessor which has not been set | 9693 // * the hole: an accessor which has not been set |
9691 // * a pointer to a map: a transition used to ensure map sharing | 9694 // * a pointer to a map: a transition used to ensure map sharing |
| 9695 // access_flags provides the ability to override access checks on access check |
| 9696 // failure. |
9692 class AccessorPair: public Struct { | 9697 class AccessorPair: public Struct { |
9693 public: | 9698 public: |
9694 DECL_ACCESSORS(getter, Object) | 9699 DECL_ACCESSORS(getter, Object) |
9695 DECL_ACCESSORS(setter, Object) | 9700 DECL_ACCESSORS(setter, Object) |
| 9701 DECL_ACCESSORS(access_flags, Smi) |
| 9702 |
| 9703 inline void set_access_flags(v8::AccessControl access_control); |
| 9704 inline bool all_can_read(); |
| 9705 inline bool all_can_write(); |
| 9706 inline bool prohibits_overwriting(); |
9696 | 9707 |
9697 static inline AccessorPair* cast(Object* obj); | 9708 static inline AccessorPair* cast(Object* obj); |
9698 | 9709 |
9699 static Handle<AccessorPair> Copy(Handle<AccessorPair> pair); | 9710 static Handle<AccessorPair> Copy(Handle<AccessorPair> pair); |
9700 | 9711 |
9701 Object* get(AccessorComponent component) { | 9712 Object* get(AccessorComponent component) { |
9702 return component == ACCESSOR_GETTER ? getter() : setter(); | 9713 return component == ACCESSOR_GETTER ? getter() : setter(); |
9703 } | 9714 } |
9704 | 9715 |
9705 void set(AccessorComponent component, Object* value) { | 9716 void set(AccessorComponent component, Object* value) { |
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9722 bool ContainsAccessor() { | 9733 bool ContainsAccessor() { |
9723 return IsJSAccessor(getter()) || IsJSAccessor(setter()); | 9734 return IsJSAccessor(getter()) || IsJSAccessor(setter()); |
9724 } | 9735 } |
9725 | 9736 |
9726 // Dispatched behavior. | 9737 // Dispatched behavior. |
9727 DECLARE_PRINTER(AccessorPair) | 9738 DECLARE_PRINTER(AccessorPair) |
9728 DECLARE_VERIFIER(AccessorPair) | 9739 DECLARE_VERIFIER(AccessorPair) |
9729 | 9740 |
9730 static const int kGetterOffset = HeapObject::kHeaderSize; | 9741 static const int kGetterOffset = HeapObject::kHeaderSize; |
9731 static const int kSetterOffset = kGetterOffset + kPointerSize; | 9742 static const int kSetterOffset = kGetterOffset + kPointerSize; |
9732 static const int kSize = kSetterOffset + kPointerSize; | 9743 static const int kAccessFlagsOffset = kSetterOffset + kPointerSize; |
| 9744 static const int kSize = kAccessFlagsOffset + kPointerSize; |
9733 | 9745 |
9734 private: | 9746 private: |
| 9747 static const int kAllCanReadBit = 0; |
| 9748 static const int kAllCanWriteBit = 1; |
| 9749 static const int kProhibitsOverwritingBit = 2; |
| 9750 |
9735 // Strangely enough, in addition to functions and harmony proxies, the spec | 9751 // Strangely enough, in addition to functions and harmony proxies, the spec |
9736 // requires us to consider undefined as a kind of accessor, too: | 9752 // requires us to consider undefined as a kind of accessor, too: |
9737 // var obj = {}; | 9753 // var obj = {}; |
9738 // Object.defineProperty(obj, "foo", {get: undefined}); | 9754 // Object.defineProperty(obj, "foo", {get: undefined}); |
9739 // assertTrue("foo" in obj); | 9755 // assertTrue("foo" in obj); |
9740 bool IsJSAccessor(Object* obj) { | 9756 bool IsJSAccessor(Object* obj) { |
9741 return obj->IsSpecFunction() || obj->IsUndefined(); | 9757 return obj->IsSpecFunction() || obj->IsUndefined(); |
9742 } | 9758 } |
9743 | 9759 |
9744 DISALLOW_IMPLICIT_CONSTRUCTORS(AccessorPair); | 9760 DISALLOW_IMPLICIT_CONSTRUCTORS(AccessorPair); |
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10187 } else { | 10203 } else { |
10188 value &= ~(1 << bit_position); | 10204 value &= ~(1 << bit_position); |
10189 } | 10205 } |
10190 return value; | 10206 return value; |
10191 } | 10207 } |
10192 }; | 10208 }; |
10193 | 10209 |
10194 } } // namespace v8::internal | 10210 } } // namespace v8::internal |
10195 | 10211 |
10196 #endif // V8_OBJECTS_H_ | 10212 #endif // V8_OBJECTS_H_ |
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