--- old/src/share/vm/interpreter/interpreterRuntime.cpp	2015-10-14 13:54:07.335055922 +0200
+++ new/src/share/vm/interpreter/interpreterRuntime.cpp	2015-10-14 13:54:07.207059017 +0200
@@ -615,7 +615,7 @@
   if (PrintBiasedLockingStatistics) {
     Atomic::inc(BiasedLocking::slow_path_entry_count_addr());
   }
-  Handle h_obj(thread, elem->obj());
+  Handle h_obj(thread, oopDesc::bs()->write_barrier(elem->obj()));
   assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
          "must be NULL or an object");
   if (UseBiasedLocking) {
@@ -637,7 +637,7 @@
 #ifdef ASSERT
   thread->last_frame().interpreter_frame_verify_monitor(elem);
 #endif
-  Handle h_obj(thread, elem->obj());
+  Handle h_obj(thread, oopDesc::bs()->write_barrier(elem->obj()));
   assert(Universe::heap()->is_in_reserved_or_null(h_obj()),
          "must be NULL or an object");
   if (elem == NULL || h_obj()->is_unlocked()) {