--- a/src/share/vm/utilities/taskqueue.hpp	Tue Sep 28 09:51:37 2010 -0700
+++ b/src/share/vm/utilities/taskqueue.hpp	Tue Sep 28 15:56:15 2010 -0700
@@ -372,75 +372,47 @@
 // OverflowTaskQueue is a TaskQueue that also includes an overflow stack for
 // elements that do not fit in the TaskQueue.
 //
-// Three methods from super classes are overridden:
+// This class hides two methods from super classes:
 //
-// initialize() - initialize the super classes and create the overflow stack
 // push() - push onto the task queue or, if that fails, onto the overflow stack
 // is_empty() - return true if both the TaskQueue and overflow stack are empty
 //
-// Note that size() is not overridden--it returns the number of elements in the
+// Note that size() is not hidden--it returns the number of elements in the
 // TaskQueue, and does not include the size of the overflow stack.  This
 // simplifies replacement of GenericTaskQueues with OverflowTaskQueues.
 template<class E, unsigned int N = TASKQUEUE_SIZE>
 class OverflowTaskQueue: public GenericTaskQueue<E, N>
 {
 public:
-  typedef GrowableArray<E>       overflow_t;
+  typedef Stack<E>               overflow_t;
   typedef GenericTaskQueue<E, N> taskqueue_t;
 
   TASKQUEUE_STATS_ONLY(using taskqueue_t::stats;)
 
-  OverflowTaskQueue();
-  ~OverflowTaskQueue();
-  void initialize();
-
-  inline overflow_t* overflow_stack() const { return _overflow_stack; }
-
   // Push task t onto the queue or onto the overflow stack.  Return true.
   inline bool push(E t);
 
   // Attempt to pop from the overflow stack; return true if anything was popped.
   inline bool pop_overflow(E& t);
 
+  inline overflow_t* overflow_stack() { return &_overflow_stack; }
+
   inline bool taskqueue_empty() const { return taskqueue_t::is_empty(); }
-  inline bool overflow_empty()  const { return overflow_stack()->is_empty(); }
+  inline bool overflow_empty()  const { return _overflow_stack.is_empty(); }
   inline bool is_empty()        const {
     return taskqueue_empty() && overflow_empty();
   }
 
 private:
-  overflow_t* _overflow_stack;
+  overflow_t _overflow_stack;
 };
 
 template <class E, unsigned int N>
-OverflowTaskQueue<E, N>::OverflowTaskQueue()
-{
-  _overflow_stack = NULL;
-}
-
-template <class E, unsigned int N>
-OverflowTaskQueue<E, N>::~OverflowTaskQueue()
-{
-  if (_overflow_stack != NULL) {
-    delete _overflow_stack;
-    _overflow_stack = NULL;
-  }
-}
-
-template <class E, unsigned int N>
-void OverflowTaskQueue<E, N>::initialize()
-{
-  taskqueue_t::initialize();
-  assert(_overflow_stack == NULL, "memory leak");
-  _overflow_stack = new (ResourceObj::C_HEAP) GrowableArray<E>(10, true);
-}
-
-template <class E, unsigned int N>
 bool OverflowTaskQueue<E, N>::push(E t)
 {
   if (!taskqueue_t::push(t)) {
     overflow_stack()->push(t);
-    TASKQUEUE_STATS_ONLY(stats.record_overflow(overflow_stack()->length()));
+    TASKQUEUE_STATS_ONLY(stats.record_overflow(overflow_stack()->size()));
   }
   return true;
 }