src/hotspot/share/interpreter/zero/bytecodeInterpreter.cpp

*** 1953,14 ***
  
                oop obj = cast_to_oop(result);
  
                // Initialize header
                assert(!UseBiasedLocking, "Not implemented");
                obj->set_mark(markWord::prototype());
-               obj->set_klass_gap(0);
                obj->set_klass(ik);
! 
                // Must prevent reordering of stores for object initialization
                // with stores that publish the new object.
                OrderAccess::storestore();
                SET_STACK_OBJECT(obj, 0);
                UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);
--- 1953,16 ---
  
                oop obj = cast_to_oop(result);
  
                // Initialize header
                assert(!UseBiasedLocking, "Not implemented");
+ #ifdef _LP64
+               oopDesc::release_set_mark(result, ik->prototype_header());
+ #else
                obj->set_mark(markWord::prototype());
                obj->set_klass(ik);
! #endif
                // Must prevent reordering of stores for object initialization
                // with stores that publish the new object.
                OrderAccess::storestore();
                SET_STACK_OBJECT(obj, 0);
                UPDATE_PC_AND_TOS_AND_CONTINUE(3, 1);