--- a/src/hotspot/share/runtime/init.hpp	Wed Mar 27 10:38:49 2019 +0100
+++ b/src/hotspot/share/runtime/init.hpp	Wed Mar 27 10:38:49 2019 +0100
@@ -40,6 +40,7 @@
 void exit_globals();     // call destructors before exit
 
 bool is_init_completed();     // returns true when bootstrapping has completed
+void wait_init_completed();   // wait until set_init_completed() has been called
 void set_init_completed();    // set basic init to completed
 
 #endif // SHARE_RUNTIME_INIT_HPP