| // Copyright 2015 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef V8_HEAP_SCAVENGER_INL_H_ |
| #define V8_HEAP_SCAVENGER_INL_H_ |
| |
| #include "src/heap/scavenger.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| void Scavenger::ScavengeObject(HeapObject** p, HeapObject* object) { |
| DCHECK(object->GetIsolate()->heap()->InFromSpace(object)); |
| |
| // We use the first word (where the map pointer usually is) of a heap |
| // object to record the forwarding pointer. A forwarding pointer can |
| // point to an old space, the code space, or the to space of the new |
| // generation. |
| MapWord first_word = object->map_word(); |
| |
| // If the first word is a forwarding address, the object has already been |
| // copied. |
| if (first_word.IsForwardingAddress()) { |
| HeapObject* dest = first_word.ToForwardingAddress(); |
| DCHECK(object->GetIsolate()->heap()->InFromSpace(*p)); |
| *p = dest; |
| return; |
| } |
| |
| object->GetHeap()->UpdateAllocationSite<Heap::kGlobal>( |
| object, object->GetHeap()->global_pretenuring_feedback_); |
| |
| // AllocationMementos are unrooted and shouldn't survive a scavenge |
| DCHECK(object->map() != object->GetHeap()->allocation_memento_map()); |
| // Call the slow part of scavenge object. |
| return ScavengeObjectSlow(p, object); |
| } |
| |
| |
| // static |
| void StaticScavengeVisitor::VisitPointer(Heap* heap, HeapObject* obj, |
| Object** p) { |
| Object* object = *p; |
| if (!heap->InNewSpace(object)) return; |
| Scavenger::ScavengeObject(reinterpret_cast<HeapObject**>(p), |
| reinterpret_cast<HeapObject*>(object)); |
| } |
| |
| } // namespace internal |
| } // namespace v8 |
| |
| #endif // V8_HEAP_SCAVENGER_INL_H_ |