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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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5340 static const int kForeignAddressOffset = kApiPointerSize; | 5340 static const int kForeignAddressOffset = kApiPointerSize; |
5341 static const int kJSObjectHeaderSize = 3 * kApiPointerSize; | 5341 static const int kJSObjectHeaderSize = 3 * kApiPointerSize; |
5342 static const int kFixedArrayHeaderSize = 2 * kApiPointerSize; | 5342 static const int kFixedArrayHeaderSize = 2 * kApiPointerSize; |
5343 static const int kContextHeaderSize = 2 * kApiPointerSize; | 5343 static const int kContextHeaderSize = 2 * kApiPointerSize; |
5344 static const int kContextEmbedderDataIndex = 65; | 5344 static const int kContextEmbedderDataIndex = 65; |
5345 static const int kFullStringRepresentationMask = 0x07; | 5345 static const int kFullStringRepresentationMask = 0x07; |
5346 static const int kStringEncodingMask = 0x4; | 5346 static const int kStringEncodingMask = 0x4; |
5347 static const int kExternalTwoByteRepresentationTag = 0x02; | 5347 static const int kExternalTwoByteRepresentationTag = 0x02; |
5348 static const int kExternalAsciiRepresentationTag = 0x06; | 5348 static const int kExternalAsciiRepresentationTag = 0x06; |
5349 | 5349 |
5350 static const int kIsolateStateOffset = 0; | |
5351 static const int kIsolateEmbedderDataOffset = 1 * kApiPointerSize; | 5350 static const int kIsolateEmbedderDataOffset = 1 * kApiPointerSize; |
5352 static const int kIsolateRootsOffset = 3 * kApiPointerSize; | 5351 static const int kIsolateRootsOffset = 3 * kApiPointerSize; |
5353 static const int kUndefinedValueRootIndex = 5; | 5352 static const int kUndefinedValueRootIndex = 5; |
5354 static const int kNullValueRootIndex = 7; | 5353 static const int kNullValueRootIndex = 7; |
5355 static const int kTrueValueRootIndex = 8; | 5354 static const int kTrueValueRootIndex = 8; |
5356 static const int kFalseValueRootIndex = 9; | 5355 static const int kFalseValueRootIndex = 9; |
5357 static const int kEmptyStringRootIndex = 131; | 5356 static const int kEmptyStringRootIndex = 131; |
5358 | 5357 |
5359 static const int kNodeClassIdOffset = 1 * kApiPointerSize; | 5358 static const int kNodeClassIdOffset = 1 * kApiPointerSize; |
5360 static const int kNodeFlagsOffset = 1 * kApiPointerSize + 3; | 5359 static const int kNodeFlagsOffset = 1 * kApiPointerSize + 3; |
5361 static const int kNodeStateMask = 0xf; | 5360 static const int kNodeStateMask = 0xf; |
5362 static const int kNodeStateIsWeakValue = 2; | 5361 static const int kNodeStateIsWeakValue = 2; |
5363 static const int kNodeStateIsNearDeathValue = 4; | 5362 static const int kNodeStateIsNearDeathValue = 4; |
5364 static const int kNodeIsIndependentShift = 4; | 5363 static const int kNodeIsIndependentShift = 4; |
5365 static const int kNodeIsPartiallyDependentShift = 5; | 5364 static const int kNodeIsPartiallyDependentShift = 5; |
5366 | 5365 |
5367 static const int kJSObjectType = 0xb0; | 5366 static const int kJSObjectType = 0xb0; |
5368 static const int kFirstNonstringType = 0x80; | 5367 static const int kFirstNonstringType = 0x80; |
5369 static const int kOddballType = 0x83; | 5368 static const int kOddballType = 0x83; |
5370 static const int kForeignType = 0x88; | 5369 static const int kForeignType = 0x88; |
5371 | 5370 |
5372 static const int kUndefinedOddballKind = 5; | 5371 static const int kUndefinedOddballKind = 5; |
5373 static const int kNullOddballKind = 3; | 5372 static const int kNullOddballKind = 3; |
5374 | 5373 |
| 5374 #ifdef V8_ENABLE_CHECKS |
| 5375 static void CheckInitialized(v8::Isolate* isolate); |
| 5376 #else |
| 5377 static void CheckInitialized(v8::Isolate* isolate) { } |
| 5378 #endif |
| 5379 |
5375 V8_INLINE(static bool HasHeapObjectTag(internal::Object* value)) { | 5380 V8_INLINE(static bool HasHeapObjectTag(internal::Object* value)) { |
5376 return ((reinterpret_cast<intptr_t>(value) & kHeapObjectTagMask) == | 5381 return ((reinterpret_cast<intptr_t>(value) & kHeapObjectTagMask) == |
5377 kHeapObjectTag); | 5382 kHeapObjectTag); |
5378 } | 5383 } |
5379 | 5384 |
5380 V8_INLINE(static int SmiValue(internal::Object* value)) { | 5385 V8_INLINE(static int SmiValue(internal::Object* value)) { |
5381 return PlatformSmiTagging::SmiToInt(value); | 5386 return PlatformSmiTagging::SmiToInt(value); |
5382 } | 5387 } |
5383 | 5388 |
5384 V8_INLINE(static internal::Object* IntToSmi(int value)) { | 5389 V8_INLINE(static internal::Object* IntToSmi(int value)) { |
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5398 V8_INLINE(static int GetOddballKind(internal::Object* obj)) { | 5403 V8_INLINE(static int GetOddballKind(internal::Object* obj)) { |
5399 typedef internal::Object O; | 5404 typedef internal::Object O; |
5400 return SmiValue(ReadField<O*>(obj, kOddballKindOffset)); | 5405 return SmiValue(ReadField<O*>(obj, kOddballKindOffset)); |
5401 } | 5406 } |
5402 | 5407 |
5403 V8_INLINE(static bool IsExternalTwoByteString(int instance_type)) { | 5408 V8_INLINE(static bool IsExternalTwoByteString(int instance_type)) { |
5404 int representation = (instance_type & kFullStringRepresentationMask); | 5409 int representation = (instance_type & kFullStringRepresentationMask); |
5405 return representation == kExternalTwoByteRepresentationTag; | 5410 return representation == kExternalTwoByteRepresentationTag; |
5406 } | 5411 } |
5407 | 5412 |
5408 V8_INLINE(static bool IsInitialized(v8::Isolate* isolate)) { | |
5409 uint8_t* addr = reinterpret_cast<uint8_t*>(isolate) + kIsolateStateOffset; | |
5410 return *reinterpret_cast<int*>(addr) == 1; | |
5411 } | |
5412 | |
5413 V8_INLINE(static uint8_t GetNodeFlag(internal::Object** obj, int shift)) { | 5413 V8_INLINE(static uint8_t GetNodeFlag(internal::Object** obj, int shift)) { |
5414 uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + kNodeFlagsOffset; | 5414 uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + kNodeFlagsOffset; |
5415 return *addr & (1 << shift); | 5415 return *addr & (1 << shift); |
5416 } | 5416 } |
5417 | 5417 |
5418 V8_INLINE(static void UpdateNodeFlag(internal::Object** obj, | 5418 V8_INLINE(static void UpdateNodeFlag(internal::Object** obj, |
5419 bool value, int shift)) { | 5419 bool value, int shift)) { |
5420 uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + kNodeFlagsOffset; | 5420 uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + kNodeFlagsOffset; |
5421 uint8_t mask = 1 << shift; | 5421 uint8_t mask = 1 << shift; |
5422 *addr = (*addr & ~mask) | (value << shift); | 5422 *addr = (*addr & ~mask) | (value << shift); |
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5978 #ifdef V8_ENABLE_CHECKS | 5978 #ifdef V8_ENABLE_CHECKS |
5979 CheckCast(value); | 5979 CheckCast(value); |
5980 #endif | 5980 #endif |
5981 return static_cast<String*>(value); | 5981 return static_cast<String*>(value); |
5982 } | 5982 } |
5983 | 5983 |
5984 | 5984 |
5985 Local<String> String::Empty(Isolate* isolate) { | 5985 Local<String> String::Empty(Isolate* isolate) { |
5986 typedef internal::Object* S; | 5986 typedef internal::Object* S; |
5987 typedef internal::Internals I; | 5987 typedef internal::Internals I; |
5988 if (!I::IsInitialized(isolate)) return Empty(); | 5988 I::CheckInitialized(isolate); |
5989 S* slot = I::GetRoot(isolate, I::kEmptyStringRootIndex); | 5989 S* slot = I::GetRoot(isolate, I::kEmptyStringRootIndex); |
5990 return Local<String>(reinterpret_cast<String*>(slot)); | 5990 return Local<String>(reinterpret_cast<String*>(slot)); |
5991 } | 5991 } |
5992 | 5992 |
5993 | 5993 |
5994 Local<String> String::New(const char* data, int length) { | 5994 Local<String> String::New(const char* data, int length) { |
5995 return NewFromUtf8(Isolate::GetCurrent(), data, kNormalString, length); | 5995 return NewFromUtf8(Isolate::GetCurrent(), data, kNormalString, length); |
5996 } | 5996 } |
5997 | 5997 |
5998 | 5998 |
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6347 | 6347 |
6348 template<typename T> | 6348 template<typename T> |
6349 ReturnValue<T> PropertyCallbackInfo<T>::GetReturnValue() const { | 6349 ReturnValue<T> PropertyCallbackInfo<T>::GetReturnValue() const { |
6350 return ReturnValue<T>(&args_[kReturnValueIndex]); | 6350 return ReturnValue<T>(&args_[kReturnValueIndex]); |
6351 } | 6351 } |
6352 | 6352 |
6353 | 6353 |
6354 Handle<Primitive> Undefined(Isolate* isolate) { | 6354 Handle<Primitive> Undefined(Isolate* isolate) { |
6355 typedef internal::Object* S; | 6355 typedef internal::Object* S; |
6356 typedef internal::Internals I; | 6356 typedef internal::Internals I; |
6357 if (!I::IsInitialized(isolate)) return Undefined(); | 6357 I::CheckInitialized(isolate); |
6358 S* slot = I::GetRoot(isolate, I::kUndefinedValueRootIndex); | 6358 S* slot = I::GetRoot(isolate, I::kUndefinedValueRootIndex); |
6359 return Handle<Primitive>(reinterpret_cast<Primitive*>(slot)); | 6359 return Handle<Primitive>(reinterpret_cast<Primitive*>(slot)); |
6360 } | 6360 } |
6361 | 6361 |
6362 | 6362 |
6363 Handle<Primitive> Null(Isolate* isolate) { | 6363 Handle<Primitive> Null(Isolate* isolate) { |
6364 typedef internal::Object* S; | 6364 typedef internal::Object* S; |
6365 typedef internal::Internals I; | 6365 typedef internal::Internals I; |
6366 if (!I::IsInitialized(isolate)) return Null(); | 6366 I::CheckInitialized(isolate); |
6367 S* slot = I::GetRoot(isolate, I::kNullValueRootIndex); | 6367 S* slot = I::GetRoot(isolate, I::kNullValueRootIndex); |
6368 return Handle<Primitive>(reinterpret_cast<Primitive*>(slot)); | 6368 return Handle<Primitive>(reinterpret_cast<Primitive*>(slot)); |
6369 } | 6369 } |
6370 | 6370 |
6371 | 6371 |
6372 Handle<Boolean> True(Isolate* isolate) { | 6372 Handle<Boolean> True(Isolate* isolate) { |
6373 typedef internal::Object* S; | 6373 typedef internal::Object* S; |
6374 typedef internal::Internals I; | 6374 typedef internal::Internals I; |
6375 if (!I::IsInitialized(isolate)) return True(); | 6375 I::CheckInitialized(isolate); |
6376 S* slot = I::GetRoot(isolate, I::kTrueValueRootIndex); | 6376 S* slot = I::GetRoot(isolate, I::kTrueValueRootIndex); |
6377 return Handle<Boolean>(reinterpret_cast<Boolean*>(slot)); | 6377 return Handle<Boolean>(reinterpret_cast<Boolean*>(slot)); |
6378 } | 6378 } |
6379 | 6379 |
6380 | 6380 |
6381 Handle<Boolean> False(Isolate* isolate) { | 6381 Handle<Boolean> False(Isolate* isolate) { |
6382 typedef internal::Object* S; | 6382 typedef internal::Object* S; |
6383 typedef internal::Internals I; | 6383 typedef internal::Internals I; |
6384 if (!I::IsInitialized(isolate)) return False(); | 6384 I::CheckInitialized(isolate); |
6385 S* slot = I::GetRoot(isolate, I::kFalseValueRootIndex); | 6385 S* slot = I::GetRoot(isolate, I::kFalseValueRootIndex); |
6386 return Handle<Boolean>(reinterpret_cast<Boolean*>(slot)); | 6386 return Handle<Boolean>(reinterpret_cast<Boolean*>(slot)); |
6387 } | 6387 } |
6388 | 6388 |
6389 | 6389 |
6390 void Isolate::SetData(void* data) { | 6390 void Isolate::SetData(void* data) { |
6391 typedef internal::Internals I; | 6391 typedef internal::Internals I; |
6392 I::SetEmbedderData(this, data); | 6392 I::SetEmbedderData(this, data); |
6393 } | 6393 } |
6394 | 6394 |
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6434 | 6434 |
6435 | 6435 |
6436 } // namespace v8 | 6436 } // namespace v8 |
6437 | 6437 |
6438 | 6438 |
6439 #undef V8EXPORT | 6439 #undef V8EXPORT |
6440 #undef TYPE_CHECK | 6440 #undef TYPE_CHECK |
6441 | 6441 |
6442 | 6442 |
6443 #endif // V8_H_ | 6443 #endif // V8_H_ |
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