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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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124 // - ExternalTwoByteInternalizedString | 124 // - ExternalTwoByteInternalizedString |
125 // - Symbol | 125 // - Symbol |
126 // - HeapNumber | 126 // - HeapNumber |
127 // - Cell | 127 // - Cell |
128 // - PropertyCell | 128 // - PropertyCell |
129 // - Code | 129 // - Code |
130 // - Map | 130 // - Map |
131 // - Oddball | 131 // - Oddball |
132 // - Foreign | 132 // - Foreign |
133 // - SharedFunctionInfo | 133 // - SharedFunctionInfo |
134 // - OptimizedCodeEntry | |
135 // - Struct | 134 // - Struct |
136 // - Box | 135 // - Box |
137 // - DeclaredAccessorDescriptor | 136 // - DeclaredAccessorDescriptor |
138 // - AccessorInfo | 137 // - AccessorInfo |
139 // - DeclaredAccessorInfo | 138 // - DeclaredAccessorInfo |
140 // - ExecutableAccessorInfo | 139 // - ExecutableAccessorInfo |
141 // - AccessorPair | 140 // - AccessorPair |
142 // - AccessCheckInfo | 141 // - AccessCheckInfo |
143 // - InterceptorInfo | 142 // - InterceptorInfo |
144 // - CallHandlerInfo | 143 // - CallHandlerInfo |
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400 V(SCRIPT_TYPE) \ | 399 V(SCRIPT_TYPE) \ |
401 V(CODE_CACHE_TYPE) \ | 400 V(CODE_CACHE_TYPE) \ |
402 V(POLYMORPHIC_CODE_CACHE_TYPE) \ | 401 V(POLYMORPHIC_CODE_CACHE_TYPE) \ |
403 V(TYPE_FEEDBACK_INFO_TYPE) \ | 402 V(TYPE_FEEDBACK_INFO_TYPE) \ |
404 V(ALIASED_ARGUMENTS_ENTRY_TYPE) \ | 403 V(ALIASED_ARGUMENTS_ENTRY_TYPE) \ |
405 V(BOX_TYPE) \ | 404 V(BOX_TYPE) \ |
406 \ | 405 \ |
407 V(FIXED_ARRAY_TYPE) \ | 406 V(FIXED_ARRAY_TYPE) \ |
408 V(FIXED_DOUBLE_ARRAY_TYPE) \ | 407 V(FIXED_DOUBLE_ARRAY_TYPE) \ |
409 V(SHARED_FUNCTION_INFO_TYPE) \ | 408 V(SHARED_FUNCTION_INFO_TYPE) \ |
410 V(OPTIMIZED_CODE_ENTRY_TYPE) \ | |
411 \ | 409 \ |
412 V(JS_MESSAGE_OBJECT_TYPE) \ | 410 V(JS_MESSAGE_OBJECT_TYPE) \ |
413 \ | 411 \ |
414 V(JS_VALUE_TYPE) \ | 412 V(JS_VALUE_TYPE) \ |
415 V(JS_DATE_TYPE) \ | 413 V(JS_DATE_TYPE) \ |
416 V(JS_OBJECT_TYPE) \ | 414 V(JS_OBJECT_TYPE) \ |
417 V(JS_CONTEXT_EXTENSION_OBJECT_TYPE) \ | 415 V(JS_CONTEXT_EXTENSION_OBJECT_TYPE) \ |
418 V(JS_GENERATOR_OBJECT_TYPE) \ | 416 V(JS_GENERATOR_OBJECT_TYPE) \ |
419 V(JS_MODULE_TYPE) \ | 417 V(JS_MODULE_TYPE) \ |
420 V(JS_GLOBAL_OBJECT_TYPE) \ | 418 V(JS_GLOBAL_OBJECT_TYPE) \ |
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751 BOX_TYPE, | 749 BOX_TYPE, |
752 // The following two instance types are only used when ENABLE_DEBUGGER_SUPPORT | 750 // The following two instance types are only used when ENABLE_DEBUGGER_SUPPORT |
753 // is defined. However as include/v8.h contain some of the instance type | 751 // is defined. However as include/v8.h contain some of the instance type |
754 // constants always having them avoids them getting different numbers | 752 // constants always having them avoids them getting different numbers |
755 // depending on whether ENABLE_DEBUGGER_SUPPORT is defined or not. | 753 // depending on whether ENABLE_DEBUGGER_SUPPORT is defined or not. |
756 DEBUG_INFO_TYPE, | 754 DEBUG_INFO_TYPE, |
757 BREAK_POINT_INFO_TYPE, | 755 BREAK_POINT_INFO_TYPE, |
758 | 756 |
759 FIXED_ARRAY_TYPE, | 757 FIXED_ARRAY_TYPE, |
760 SHARED_FUNCTION_INFO_TYPE, | 758 SHARED_FUNCTION_INFO_TYPE, |
761 OPTIMIZED_CODE_ENTRY_TYPE, | |
762 | 759 |
763 JS_MESSAGE_OBJECT_TYPE, | 760 JS_MESSAGE_OBJECT_TYPE, |
764 | 761 |
765 // All the following types are subtypes of JSReceiver, which corresponds to | 762 // All the following types are subtypes of JSReceiver, which corresponds to |
766 // objects in the JS sense. The first and the last type in this range are | 763 // objects in the JS sense. The first and the last type in this range are |
767 // the two forms of function. This organization enables using the same | 764 // the two forms of function. This organization enables using the same |
768 // compares for checking the JS_RECEIVER/SPEC_OBJECT range and the | 765 // compares for checking the JS_RECEIVER/SPEC_OBJECT range and the |
769 // NONCALLABLE_JS_OBJECT range. | 766 // NONCALLABLE_JS_OBJECT range. |
770 JS_FUNCTION_PROXY_TYPE, // FIRST_JS_RECEIVER_TYPE, FIRST_JS_PROXY_TYPE | 767 JS_FUNCTION_PROXY_TYPE, // FIRST_JS_RECEIVER_TYPE, FIRST_JS_PROXY_TYPE |
771 JS_PROXY_TYPE, // LAST_JS_PROXY_TYPE | 768 JS_PROXY_TYPE, // LAST_JS_PROXY_TYPE |
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1013 V(TypeFeedbackCells) \ | 1010 V(TypeFeedbackCells) \ |
1014 V(FixedArray) \ | 1011 V(FixedArray) \ |
1015 V(FixedDoubleArray) \ | 1012 V(FixedDoubleArray) \ |
1016 V(Context) \ | 1013 V(Context) \ |
1017 V(NativeContext) \ | 1014 V(NativeContext) \ |
1018 V(ScopeInfo) \ | 1015 V(ScopeInfo) \ |
1019 V(JSFunction) \ | 1016 V(JSFunction) \ |
1020 V(Code) \ | 1017 V(Code) \ |
1021 V(Oddball) \ | 1018 V(Oddball) \ |
1022 V(SharedFunctionInfo) \ | 1019 V(SharedFunctionInfo) \ |
1023 V(OptimizedCodeEntry) \ | |
1024 V(JSValue) \ | 1020 V(JSValue) \ |
1025 V(JSDate) \ | 1021 V(JSDate) \ |
1026 V(JSMessageObject) \ | 1022 V(JSMessageObject) \ |
1027 V(StringWrapper) \ | 1023 V(StringWrapper) \ |
1028 V(Foreign) \ | 1024 V(Foreign) \ |
1029 V(Boolean) \ | 1025 V(Boolean) \ |
1030 V(JSArray) \ | 1026 V(JSArray) \ |
1031 V(JSArrayBuffer) \ | 1027 V(JSArrayBuffer) \ |
1032 V(JSArrayBufferView) \ | 1028 V(JSArrayBufferView) \ |
1033 V(JSTypedArray) \ | 1029 V(JSTypedArray) \ |
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6795 ((kNative + kCompilerHintsSmiTagSize) / kBitsPerByte); | 6791 ((kNative + kCompilerHintsSmiTagSize) / kBitsPerByte); |
6796 #else | 6792 #else |
6797 #error Unknown byte ordering | 6793 #error Unknown byte ordering |
6798 #endif | 6794 #endif |
6799 | 6795 |
6800 private: | 6796 private: |
6801 DISALLOW_IMPLICIT_CONSTRUCTORS(SharedFunctionInfo); | 6797 DISALLOW_IMPLICIT_CONSTRUCTORS(SharedFunctionInfo); |
6802 }; | 6798 }; |
6803 | 6799 |
6804 | 6800 |
6805 // An optimized code entry represents an association between the native | |
6806 // context, a function, optimized code, and the literals. The entries | |
6807 // are linked into two lists for efficient lookup: by native context | |
6808 // (linked through next_by_native_context), or by shared function | |
6809 // info (linked through next_by_shared_info). | |
6810 // The references to the native context, function, and code are weak, | |
6811 // in order not to leak native contexts or functions through | |
6812 // SharedFunctionInfo. This means an entry can become "dead" through GC. | |
6813 // Entries are removed lazily as each list is traversed. | |
6814 class OptimizedCodeEntry: public HeapObject { | |
6815 public: | |
6816 // [native_context]: The native context of this entry. (WEAK) | |
6817 DECL_ACCESSORS(native_context, Context) | |
6818 | |
6819 // [function]: The JSFunction of this entry. (WEAK) | |
6820 DECL_ACCESSORS(function, JSFunction) | |
6821 | |
6822 // [code]: The optimized code of this entry. (WEAK) | |
6823 DECL_ACCESSORS(code, Code) | |
6824 | |
6825 // [literals]: Array of literals for this entry. | |
6826 DECL_ACCESSORS(literals, FixedArray) | |
6827 | |
6828 // [next_by_shared_info]: The next link in the list, when traversing | |
6829 // starting with a SharedFunctionInfo. (NULL if none). | |
6830 DECL_ACCESSORS(next_by_shared_info, OptimizedCodeEntry) | |
6831 | |
6832 // [next_by_native_context]: The next link in the list, when traversing | |
6833 // starting with a native context. (NULL if none) | |
6834 DECL_ACCESSORS(next_by_native_context, OptimizedCodeEntry) | |
6835 | |
6836 // Casting. | |
6837 static inline OptimizedCodeEntry* cast(Object* obj); | |
6838 | |
6839 DECLARE_PRINTER(OptimizedCodeEntry) | |
6840 DECLARE_VERIFIER(OptimizedCodeEntry) | |
6841 | |
6842 // Layout description. | |
6843 static const int kNativeContextOffset = JSObject::kHeaderSize; | |
6844 static const int kFunctionOffset = kNativeContextOffset + kPointerSize; | |
6845 static const int kCodeOffset = kFunctionOffset + kPointerSize; | |
6846 static const int kLiteralsOffset = kCodeOffset + kPointerSize; | |
6847 static const int kNextBySharedInfoOffset = | |
6848 kLiteralsOffset + kPointerSize; | |
6849 static const int kNextByNativeContextOffset = | |
6850 kNextBySharedInfoOffset + kPointerSize; | |
6851 static const int kCacheableOffset = kNextByNativeContextOffset + kPointerSize; | |
6852 static const int kSize = kCacheableOffset + kIntSize; | |
6853 static const int kAlignedSize = OBJECT_POINTER_ALIGN(kSize); | |
6854 | |
6855 typedef FixedBodyDescriptor<kLiteralsOffset, | |
6856 kNextByNativeContextOffset + kPointerSize, | |
6857 kSize> BodyDescriptor; | |
6858 | |
6859 // Kills an entry, nulling out its references to native context, function, | |
6860 // code, and literals. | |
6861 void Kill(); | |
6862 inline bool cacheable(); | |
6863 inline void set_cacheable(bool val); | |
6864 | |
6865 private: | |
6866 // Used internally during traversal to skip dead entries. | |
6867 inline bool IsDead() { | |
6868 return function() == NULL || code() == NULL; | |
6869 } | |
6870 | |
6871 DISALLOW_IMPLICIT_CONSTRUCTORS(OptimizedCodeEntry); | |
6872 }; | |
6873 | |
6874 | |
6875 class JSGeneratorObject: public JSObject { | 6801 class JSGeneratorObject: public JSObject { |
6876 public: | 6802 public: |
6877 // [function]: The function corresponding to this generator object. | 6803 // [function]: The function corresponding to this generator object. |
6878 DECL_ACCESSORS(function, JSFunction) | 6804 DECL_ACCESSORS(function, JSFunction) |
6879 | 6805 |
6880 // [context]: The context of the suspended computation. | 6806 // [context]: The context of the suspended computation. |
6881 DECL_ACCESSORS(context, Context) | 6807 DECL_ACCESSORS(context, Context) |
6882 | 6808 |
6883 // [receiver]: The receiver of the suspended computation. | 6809 // [receiver]: The receiver of the suspended computation. |
6884 DECL_ACCESSORS(receiver, Object) | 6810 DECL_ACCESSORS(receiver, Object) |
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10233 } else { | 10159 } else { |
10234 value &= ~(1 << bit_position); | 10160 value &= ~(1 << bit_position); |
10235 } | 10161 } |
10236 return value; | 10162 return value; |
10237 } | 10163 } |
10238 }; | 10164 }; |
10239 | 10165 |
10240 } } // namespace v8::internal | 10166 } } // namespace v8::internal |
10241 | 10167 |
10242 #endif // V8_OBJECTS_H_ | 10168 #endif // V8_OBJECTS_H_ |
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