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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_OBJECTS_H_ | 5 #ifndef V8_OBJECTS_H_ |
6 #define V8_OBJECTS_H_ | 6 #define V8_OBJECTS_H_ |
7 | 7 |
8 #include <iosfwd> | 8 #include <iosfwd> |
9 #include <memory> | 9 #include <memory> |
10 | 10 |
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4705 inline static FreeSpace* cast(HeapObject* obj); | 4705 inline static FreeSpace* cast(HeapObject* obj); |
4706 | 4706 |
4707 // Dispatched behavior. | 4707 // Dispatched behavior. |
4708 DECLARE_PRINTER(FreeSpace) | 4708 DECLARE_PRINTER(FreeSpace) |
4709 DECLARE_VERIFIER(FreeSpace) | 4709 DECLARE_VERIFIER(FreeSpace) |
4710 | 4710 |
4711 // Layout description. | 4711 // Layout description. |
4712 // Size is smi tagged when it is stored. | 4712 // Size is smi tagged when it is stored. |
4713 static const int kSizeOffset = HeapObject::kHeaderSize; | 4713 static const int kSizeOffset = HeapObject::kHeaderSize; |
4714 static const int kNextOffset = POINTER_SIZE_ALIGN(kSizeOffset + kPointerSize); | 4714 static const int kNextOffset = POINTER_SIZE_ALIGN(kSizeOffset + kPointerSize); |
| 4715 static const int kSize = kNextOffset + kPointerSize; |
4715 | 4716 |
4716 private: | 4717 private: |
4717 DISALLOW_IMPLICIT_CONSTRUCTORS(FreeSpace); | 4718 DISALLOW_IMPLICIT_CONSTRUCTORS(FreeSpace); |
4718 }; | 4719 }; |
4719 | 4720 |
4720 | 4721 |
4721 // V has parameters (Type, type, TYPE, C type, element_size) | 4722 // V has parameters (Type, type, TYPE, C type, element_size) |
4722 #define TYPED_ARRAYS(V) \ | 4723 #define TYPED_ARRAYS(V) \ |
4723 V(Uint8, uint8, UINT8, uint8_t, 1) \ | 4724 V(Uint8, uint8, UINT8, uint8_t, 1) \ |
4724 V(Int8, int8, INT8, int8_t, 1) \ | 4725 V(Int8, int8, INT8, int8_t, 1) \ |
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10460 DECLARE_PRINTER(JSArray) | 10461 DECLARE_PRINTER(JSArray) |
10461 DECLARE_VERIFIER(JSArray) | 10462 DECLARE_VERIFIER(JSArray) |
10462 | 10463 |
10463 // Number of element slots to pre-allocate for an empty array. | 10464 // Number of element slots to pre-allocate for an empty array. |
10464 static const int kPreallocatedArrayElements = 4; | 10465 static const int kPreallocatedArrayElements = 4; |
10465 | 10466 |
10466 // Layout description. | 10467 // Layout description. |
10467 static const int kLengthOffset = JSObject::kHeaderSize; | 10468 static const int kLengthOffset = JSObject::kHeaderSize; |
10468 static const int kSize = kLengthOffset + kPointerSize; | 10469 static const int kSize = kLengthOffset + kPointerSize; |
10469 | 10470 |
10470 // 600 * KB is the Page::kMaxRegularHeapObjectSize defined in spaces.h which | 10471 // 400 * KB is the Page::kMaxRegularHeapObjectSize defined in spaces.h which |
10471 // we do not want to include in objects.h | 10472 // we do not want to include in objects.h |
10472 // Note that Page::kMaxRegularHeapObjectSize has to be in sync with | 10473 // Note that Page::kMaxRegularHeapObjectSize has to be in sync with |
10473 // kInitialMaxFastElementArray which is checked in a DCHECK in heap.cc. | 10474 // kInitialMaxFastElementArray which is checked in a DCHECK in heap.cc. |
10474 static const int kInitialMaxFastElementArray = | 10475 static const int kInitialMaxFastElementArray = |
10475 (600 * KB - FixedArray::kHeaderSize - kSize - AllocationMemento::kSize) / | 10476 (400 * KB - FixedArray::kHeaderSize - kSize - AllocationMemento::kSize) / |
10476 kPointerSize; | 10477 kPointerSize; |
10477 | 10478 |
10478 private: | 10479 private: |
10479 DISALLOW_IMPLICIT_CONSTRUCTORS(JSArray); | 10480 DISALLOW_IMPLICIT_CONSTRUCTORS(JSArray); |
10480 }; | 10481 }; |
10481 | 10482 |
10482 | 10483 |
10483 Handle<Object> CacheInitialJSArrayMaps(Handle<Context> native_context, | 10484 Handle<Object> CacheInitialJSArrayMaps(Handle<Context> native_context, |
10484 Handle<Map> initial_map); | 10485 Handle<Map> initial_map); |
10485 | 10486 |
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11074 } | 11075 } |
11075 return value; | 11076 return value; |
11076 } | 11077 } |
11077 }; | 11078 }; |
11078 | 11079 |
11079 | 11080 |
11080 } // NOLINT, false-positive due to second-order macros. | 11081 } // NOLINT, false-positive due to second-order macros. |
11081 } // NOLINT, false-positive due to second-order macros. | 11082 } // NOLINT, false-positive due to second-order macros. |
11082 | 11083 |
11083 #endif // V8_OBJECTS_H_ | 11084 #endif // V8_OBJECTS_H_ |
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