--- a/src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeManager.hpp	Mon Aug 26 13:09:14 2019 +0200
+++ b/src/hotspot/share/jfr/recorder/checkpoint/types/jfrTypeManager.hpp	Mon Aug 26 17:59:32 2019 +0200
@@ -34,6 +34,7 @@
   static bool initialize();
   static void clear();
   static void write_types(JfrCheckpointWriter& writer);
+  static void write_threads(JfrCheckpointWriter& writer);
   static void notify_types_on_rotation();
   static void write_type_set();
   static void write_type_set_for_unloaded_classes();