Serializer: clear next link in weak cells.

src/heap/mark-compact.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/base/atomicops.h"
 #include "src/base/bits.h"
 #include "src/code-stubs.h"
 #include "src/compilation-cache.h"
@@ skipping 2629 matching lines @@
     JSWeakCollection* weak_collection =
         reinterpret_cast<JSWeakCollection*>(weak_collection_obj);
     weak_collection_obj = weak_collection->next();
     weak_collection->set_next(heap()->undefined_value());
   }
   heap()->set_encountered_weak_collections(Smi::FromInt(0));
 }
 
 
 void MarkCompactCollector::ProcessAndClearWeakCells() {
-  HeapObject* the_hole = heap()->the_hole_value();
   Object* weak_cell_obj = heap()->encountered_weak_cells();
   while (weak_cell_obj != Smi::FromInt(0)) {
     WeakCell* weak_cell = reinterpret_cast<WeakCell*>(weak_cell_obj);
     // We do not insert cleared weak cells into the list, so the value
     // cannot be a Smi here.
     HeapObject* value = HeapObject::cast(weak_cell->value());
     if (!MarkCompactCollector::IsMarked(value)) {
       // Cells for new-space objects embedded in optimized code are wrapped in
       // WeakCell and put into Heap::weak_object_to_code_table.
       // Such cells do not have any strong references but we want to keep them
@@ skipping 14 matching lines @@
           weak_cell->clear();
         }
       } else {
         weak_cell->clear();
       }
     } else {
       Object** slot = HeapObject::RawField(weak_cell, WeakCell::kValueOffset);
       RecordSlot(slot, slot, *slot);
     }
     weak_cell_obj = weak_cell->next();
-    weak_cell->set_next(the_hole, SKIP_WRITE_BARRIER);
+    weak_cell->clear_next(heap());
   }
   heap()->set_encountered_weak_cells(Smi::FromInt(0));
 }
 
 
 void MarkCompactCollector::AbortWeakCells() {
-  Object* the_hole = heap()->the_hole_value();
   Object* weak_cell_obj = heap()->encountered_weak_cells();
   while (weak_cell_obj != Smi::FromInt(0)) {
     WeakCell* weak_cell = reinterpret_cast<WeakCell*>(weak_cell_obj);
     weak_cell_obj = weak_cell->next();
-    weak_cell->set_next(the_hole, SKIP_WRITE_BARRIER);
+    weak_cell->clear_next(heap());
   }
   heap()->set_encountered_weak_cells(Smi::FromInt(0));
 }
 
 
 void MarkCompactCollector::RecordMigratedSlot(Object* value, Address slot) {
   if (heap_->InNewSpace(value)) {
     heap_->store_buffer()->Mark(slot);
   } else if (value->IsHeapObject() && IsOnEvacuationCandidate(value)) {
     SlotsBuffer::AddTo(&slots_buffer_allocator_, &migration_slots_buffer_,
@@ skipping 2038 matching lines @@
   SlotsBuffer* buffer = *buffer_address;
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 }  // namespace internal
 }  // namespace v8