Synchronize store buffer processing and concurrent sweeping.

src/heap.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5916 matching lines @@
   while (slot_address < end) {
     Object** slot = reinterpret_cast<Object**>(slot_address);
     Object* object = *slot;
     // If the store buffer becomes overfull we mark pages as being exempt from
     // the store buffer.  These pages are scanned to find pointers that point
     // to the new space.  In that case we may hit newly promoted objects and
     // fix the pointers before the promotion queue gets to them.  Thus the 'if'.
     if (object->IsHeapObject()) {
       if (Heap::InFromSpace(object)) {
         callback(reinterpret_cast<HeapObject**>(slot),
-                 HeapObject::cast(object));
+                 HeapObject::cast(object),
+                 NULL);
         Object* new_object = *slot;
         if (InNewSpace(new_object)) {
           SLOW_ASSERT(Heap::InToSpace(new_object));
           SLOW_ASSERT(new_object->IsHeapObject());
           store_buffer_.EnterDirectlyIntoStoreBuffer(
               reinterpret_cast<Address>(slot));
         }
         SLOW_ASSERT(!MarkCompactCollector::IsOnEvacuationCandidate(new_object));
       } else if (record_slots &&
                  MarkCompactCollector::IsOnEvacuationCandidate(object)) {
@@ skipping 1756 matching lines @@
       static_cast<int>(object_sizes_last_time_[index]));
   CODE_AGE_LIST_COMPLETE(ADJUST_LAST_TIME_OBJECT_COUNT)
 #undef ADJUST_LAST_TIME_OBJECT_COUNT
 
   OS::MemCopy(object_counts_last_time_, object_counts_, sizeof(object_counts_));
   OS::MemCopy(object_sizes_last_time_, object_sizes_, sizeof(object_sizes_));
   ClearObjectStats();
 }
 
 } }  // namespace v8::internal