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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 // 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_VISITING_H_ | 5 #ifndef V8_OBJECTS_VISITING_H_ |
| 6 #define V8_OBJECTS_VISITING_H_ | 6 #define V8_OBJECTS_VISITING_H_ |
| 7 | 7 |
| 8 #include "src/allocation.h" | 8 #include "src/allocation.h" |
| 9 #include "src/heap/heap.h" | 9 #include "src/heap/heap.h" |
| 10 #include "src/heap/spaces.h" | 10 #include "src/heap/spaces.h" |
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| 125 | 125 |
| 126 // For visitors that allow specialization by size calculate VisitorId based | 126 // For visitors that allow specialization by size calculate VisitorId based |
| 127 // on size, base visitor id and generic visitor id. | 127 // on size, base visitor id and generic visitor id. |
| 128 static VisitorId GetVisitorIdForSize(VisitorId base, VisitorId generic, | 128 static VisitorId GetVisitorIdForSize(VisitorId base, VisitorId generic, |
| 129 int object_size, | 129 int object_size, |
| 130 bool has_unboxed_fields) { | 130 bool has_unboxed_fields) { |
| 131 DCHECK((base == kVisitDataObject) || (base == kVisitStruct) || | 131 DCHECK((base == kVisitDataObject) || (base == kVisitStruct) || |
| 132 (base == kVisitJSObject) || (base == kVisitJSApiObject)); | 132 (base == kVisitJSObject) || (base == kVisitJSApiObject)); |
| 133 DCHECK(IsAligned(object_size, kPointerSize)); | 133 DCHECK(IsAligned(object_size, kPointerSize)); |
| 134 DCHECK(Heap::kMinObjectSizeInWords * kPointerSize <= object_size); | 134 DCHECK(Heap::kMinObjectSizeInWords * kPointerSize <= object_size); |
| 135 DCHECK(object_size <= Page::kMaxRegularHeapObjectSize); | 135 DCHECK(object_size <= kMaxRegularHeapObjectSize); |
| 136 DCHECK(!has_unboxed_fields || (base == kVisitJSObject) || | 136 DCHECK(!has_unboxed_fields || (base == kVisitJSObject) || |
| 137 (base == kVisitJSApiObject)); | 137 (base == kVisitJSApiObject)); |
| 138 | 138 |
| 139 if (has_unboxed_fields) return generic; | 139 if (has_unboxed_fields) return generic; |
| 140 | 140 |
| 141 int visitor_id = Min( | 141 int visitor_id = Min( |
| 142 base + (object_size >> kPointerSizeLog2) - Heap::kMinObjectSizeInWords, | 142 base + (object_size >> kPointerSizeLog2) - Heap::kMinObjectSizeInWords, |
| 143 static_cast<int>(generic)); | 143 static_cast<int>(generic)); |
| 144 | 144 |
| 145 return static_cast<VisitorId>(visitor_id); | 145 return static_cast<VisitorId>(visitor_id); |
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| 452 // the next element. Given the head of the list, this function removes dead | 452 // the next element. Given the head of the list, this function removes dead |
| 453 // elements from the list and if requested records slots for next-element | 453 // elements from the list and if requested records slots for next-element |
| 454 // pointers. The template parameter T is a WeakListVisitor that defines how to | 454 // pointers. The template parameter T is a WeakListVisitor that defines how to |
| 455 // access the next-element pointers. | 455 // access the next-element pointers. |
| 456 template <class T> | 456 template <class T> |
| 457 Object* VisitWeakList(Heap* heap, Object* list, WeakObjectRetainer* retainer); | 457 Object* VisitWeakList(Heap* heap, Object* list, WeakObjectRetainer* retainer); |
| 458 } // namespace internal | 458 } // namespace internal |
| 459 } // namespace v8 | 459 } // namespace v8 |
| 460 | 460 |
| 461 #endif // V8_OBJECTS_VISITING_H_ | 461 #endif // V8_OBJECTS_VISITING_H_ |
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