[heap] Untangle Marking and friends from heap dependencies.

src/heap/incremental-marking.h

 // Copyright 2012 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_INCREMENTAL_MARKING_H_
 #define V8_HEAP_INCREMENTAL_MARKING_H_
 
 #include "src/cancelable-task.h"
 #include "src/execution.h"
 #include "src/heap/heap.h"
 #include "src/heap/incremental-marking-job.h"
+#include "src/heap/mark-compact.h"
 #include "src/heap/spaces.h"
 #include "src/objects.h"
 
 namespace v8 {
 namespace internal {
 
 // Forward declarations.
 class MarkBit;
 class PagedSpace;
 
@@ skipping 176 matching lines @@
   void NotifyIncompleteScanOfObject(int unscanned_bytes) {
     unscanned_bytes_of_large_object_ = unscanned_bytes;
   }
 
   void ClearIdleMarkingDelayCounter();
 
   bool IsIdleMarkingDelayCounterLimitReached();
 
   static void MarkObject(Heap* heap, HeapObject* object);
 
+  static void TransferMark(Heap* heap, Address old_start, Address new_start);
+
+  // Returns true if the transferred color is black.
+  INLINE(static bool TransferColor(HeapObject* from, HeapObject* to)) {
+    if (Page::FromAddress(to->address())->IsFlagSet(Page::BLACK_PAGE))
+      return true;
+    MarkBit from_mark_bit = ObjectMarking::MarkBitFrom(from);
+    MarkBit to_mark_bit = ObjectMarking::MarkBitFrom(to);
+    DCHECK(Marking::IsWhite(to_mark_bit));
+    if (from_mark_bit.Get()) {
+      to_mark_bit.Set();
+      if (from_mark_bit.Next().Get()) {
+        to_mark_bit.Next().Set();
+        return true;
+      }
+    }
+    return false;
+  }
+
   void IterateBlackObject(HeapObject* object);
 
   Heap* heap() const { return heap_; }
 
   IncrementalMarkingJob* incremental_marking_job() {
     return &incremental_marking_job_;
   }
 
   bool black_allocation() { return black_allocation_; }
 
@@ skipping 85 matching lines @@
   GCRequestType request_type_;
 
   IncrementalMarkingJob incremental_marking_job_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IncrementalMarking);
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_HEAP_INCREMENTAL_MARKING_H_