diff -r 10d2642d1905 -r d55b62dbe688 src/hotspot/share/oops/instanceKlass.cpp
--- a/src/hotspot/share/oops/instanceKlass.cpp	Thu Oct 24 08:49:21 2019 -0400
+++ b/src/hotspot/share/oops/instanceKlass.cpp	Thu Oct 24 08:52:33 2019 -0400
@@ -69,6 +69,7 @@
 #include "prims/jvmtiThreadState.hpp"
 #include "prims/methodComparator.hpp"
 #include "runtime/atomic.hpp"
+#include "runtime/biasedLocking.hpp"
 #include "runtime/fieldDescriptor.inline.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/javaCalls.hpp"
@@ -456,6 +457,12 @@
   if (Arguments::is_dumping_archive()) {
     SystemDictionaryShared::init_dumptime_info(this);
   }
+
+  // Set biased locking bit for all instances of this class; it will be
+  // cleared if revocation occurs too often for this type
+  if (UseBiasedLocking && BiasedLocking::enabled()) {
+    set_prototype_header(markWord::biased_locking_prototype());
+  }
 }
 
 void InstanceKlass::deallocate_methods(ClassLoaderData* loader_data,
@@ -2408,6 +2415,11 @@
     // --> see ArrayKlass::complete_create_array_klass()
     array_klasses()->restore_unshareable_info(ClassLoaderData::the_null_class_loader_data(), Handle(), CHECK);
   }
+
+  // Initialize current biased locking state.
+  if (UseBiasedLocking && BiasedLocking::enabled()) {
+    set_prototype_header(markWord::biased_locking_prototype());
+  }
 }
 
 // returns true IFF is_in_error_state() has been changed as a result of this call.