590   // must guarantee that pinned objects never move.

   590   // must guarantee that pinned objects never move.

   591   virtual bool supports_object_pinning() const;

   591   virtual bool supports_object_pinning() const;

   592   virtual oop pin_object(JavaThread* thread, oop obj);

   592   virtual oop pin_object(JavaThread* thread, oop obj);

   593   virtual void unpin_object(JavaThread* thread, oop obj);

   593   virtual void unpin_object(JavaThread* thread, oop obj);

   594 

   594 

   595   // Non product verification and debugging.

   597   // Non product verification and debugging.

   596 #ifndef PRODUCT

   598 #ifndef PRODUCT

   597   // Support for PromotionFailureALot.  Return true if it's time to cause a

   599   // Support for PromotionFailureALot.  Return true if it's time to cause a

   598   // promotion failure.  The no-argument version uses

   600   // promotion failure.  The no-argument version uses

   599   // this->_promotion_failure_alot_count as the counter.

   601   // this->_promotion_failure_alot_count as the counter.