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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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8578 class PropertyCell: public Cell { | 8578 class PropertyCell: public Cell { |
8579 public: | 8579 public: |
8580 // [type]: type of the global property. | 8580 // [type]: type of the global property. |
8581 Type* type(); | 8581 Type* type(); |
8582 void set_type(Type* value, WriteBarrierMode mode = UPDATE_WRITE_BARRIER); | 8582 void set_type(Type* value, WriteBarrierMode mode = UPDATE_WRITE_BARRIER); |
8583 | 8583 |
8584 // [dependent_code]: dependent code that depends on the type of the global | 8584 // [dependent_code]: dependent code that depends on the type of the global |
8585 // property. | 8585 // property. |
8586 DECL_ACCESSORS(dependent_code, DependentCode) | 8586 DECL_ACCESSORS(dependent_code, DependentCode) |
8587 | 8587 |
8588 // Sets the value of the cell and updates the type field to be the union | |
8589 // of the cell's current type and the value's type. If the change causes | |
8590 // a change of the type of the cell's contents, code dependent on the cell | |
8591 // will be deoptimized. | |
8592 void SetValueInferType(Object* value, | |
8593 WriteBarrierMode mode = UPDATE_WRITE_BARRIER); | |
8594 | |
8595 // Casting. | 8588 // Casting. |
8596 static inline PropertyCell* cast(Object* obj); | 8589 static inline PropertyCell* cast(Object* obj); |
8597 | 8590 |
8598 inline Address TypeAddress() { | 8591 inline Address TypeAddress() { |
8599 return address() + kTypeOffset; | 8592 return address() + kTypeOffset; |
8600 } | 8593 } |
8601 | 8594 |
8602 // Dispatched behavior. | 8595 // Dispatched behavior. |
8603 DECLARE_PRINTER(PropertyCell) | 8596 DECLARE_PRINTER(PropertyCell) |
8604 DECLARE_VERIFIER(PropertyCell) | 8597 DECLARE_VERIFIER(PropertyCell) |
8605 | 8598 |
8606 // Layout description. | 8599 // Layout description. |
8607 static const int kTypeOffset = kValueOffset + kPointerSize; | 8600 static const int kTypeOffset = kValueOffset + kPointerSize; |
8608 static const int kDependentCodeOffset = kTypeOffset + kPointerSize; | 8601 static const int kDependentCodeOffset = kTypeOffset + kPointerSize; |
8609 static const int kSize = kDependentCodeOffset + kPointerSize; | 8602 static const int kSize = kDependentCodeOffset + kPointerSize; |
8610 | 8603 |
8611 static const int kPointerFieldsBeginOffset = kValueOffset; | 8604 static const int kPointerFieldsBeginOffset = kValueOffset; |
8612 static const int kPointerFieldsEndOffset = kDependentCodeOffset; | 8605 static const int kPointerFieldsEndOffset = kDependentCodeOffset; |
8613 | 8606 |
8614 typedef FixedBodyDescriptor<kValueOffset, | 8607 typedef FixedBodyDescriptor<kValueOffset, |
8615 kSize, | 8608 kSize, |
8616 kSize> BodyDescriptor; | 8609 kSize> BodyDescriptor; |
8617 | 8610 |
8618 void AddDependentCompilationInfo(CompilationInfo* info); | 8611 void AddDependentCompilationInfo(CompilationInfo* info); |
8619 | 8612 |
8620 void AddDependentCode(Handle<Code> code); | 8613 void AddDependentCode(Handle<Code> code); |
8621 | 8614 |
8622 Type* UpdateType(Object* value); | |
8623 | |
8624 private: | 8615 private: |
8625 DECL_ACCESSORS(type_raw, Object) | 8616 DECL_ACCESSORS(type_raw, Object) |
8626 DISALLOW_IMPLICIT_CONSTRUCTORS(PropertyCell); | 8617 DISALLOW_IMPLICIT_CONSTRUCTORS(PropertyCell); |
8627 }; | 8618 }; |
8628 | 8619 |
8629 | 8620 |
8630 // The JSProxy describes EcmaScript Harmony proxies | 8621 // The JSProxy describes EcmaScript Harmony proxies |
8631 class JSProxy: public JSReceiver { | 8622 class JSProxy: public JSReceiver { |
8632 public: | 8623 public: |
8633 // [handler]: The handler property. | 8624 // [handler]: The handler property. |
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9754 } else { | 9745 } else { |
9755 value &= ~(1 << bit_position); | 9746 value &= ~(1 << bit_position); |
9756 } | 9747 } |
9757 return value; | 9748 return value; |
9758 } | 9749 } |
9759 }; | 9750 }; |
9760 | 9751 |
9761 } } // namespace v8::internal | 9752 } } // namespace v8::internal |
9762 | 9753 |
9763 #endif // V8_OBJECTS_H_ | 9754 #endif // V8_OBJECTS_H_ |
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