src/share/vm/gc/cms/concurrentMarkSweepGeneration.hpp

rev 10742 : Make fields used in lock-free algorithms volatile

@@ -723,11 +723,11 @@
 
  private:
   // Support for parallelizing young gen rescan in CMS remark phase
   ParNewGeneration* _young_gen;
 
-  HeapWord** _top_addr;    // ... Top of Eden
+  HeapWord* volatile* _top_addr;    // ... Top of Eden
   HeapWord** _end_addr;    // ... End of Eden
   Mutex*     _eden_chunk_lock;
   HeapWord** _eden_chunk_array; // ... Eden partitioning array
   size_t     _eden_chunk_index; // ... top (exclusive) of array
   size_t     _eden_chunk_capacity;  // ... max entries in array