Synchronize on concurrent store buffer entries.

src/heap/mark-compact.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_MARK_COMPACT_H_
 #define V8_HEAP_MARK_COMPACT_H_
 
 #include "src/base/bits.h"
 #include "src/heap/spaces.h"
 
@@ skipping 689 matching lines @@
 
   // True if we are collecting slots to perform evacuation from evacuation
   // candidates.
   bool compacting_;
 
   bool was_marked_incrementally_;
 
   // True if concurrent or parallel sweeping is currently in progress.
   bool sweeping_in_progress_;
 
+  // True if parallel compaction is currently in progress.
+  bool parallel_compaction_in_progress_;
+
   // Synchronize sweeper threads.
   base::Semaphore pending_sweeper_jobs_semaphore_;
 
   // Synchronize compaction threads.
   base::Semaphore pending_compaction_jobs_semaphore_;
 
   bool evacuation_;
 
   SlotsBufferAllocator slots_buffer_allocator_;
 
@@ skipping 146 matching lines @@
                                             NewSpacePage* p);
 
   void EvacuateNewSpace();
 
   void EvacuateLiveObjectsFromPage(Page* p);
 
   void EvacuatePages();
 
   void EvacuatePagesInParallel();
 
+  void WaitUntilCompactionCompleted();
+
   void EvacuateNewSpaceAndCandidates();
 
   void ReleaseEvacuationCandidates();
 
   // Moves the pages of the evacuation_candidates_ list to the end of their
   // corresponding space pages list.
   void MoveEvacuationCandidatesToEndOfPagesList();
 
   void SweepSpace(PagedSpace* space, SweeperType sweeper);
 
@@ skipping 84 matching lines @@
  private:
   MarkCompactCollector* collector_;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_MARK_COMPACT_H_