--- old/src/hotspot/share/gc/g1/g1Policy.hpp	2020-02-12 17:18:33.523515588 +0800
+++ new/src/hotspot/share/gc/g1/g1Policy.hpp	2020-02-12 17:18:33.526515696 +0800
@@ -444,6 +444,7 @@
   virtual bool force_upgrade_to_full() {
     return false;
   }
+  size_t minimum_desired_bytes_after_concurrent_mark(size_t used_bytes);
 };
 
 #endif // SHARE_GC_G1_G1POLICY_HPP