--- old/src/hotspot/share/classfile/protectionDomainCache.hpp	2018-08-21 14:24:17.382323836 -0400
+++ new/src/hotspot/share/classfile/protectionDomainCache.hpp	2018-08-21 14:24:16.928281722 -0400
@@ -85,6 +85,8 @@
   ProtectionDomainCacheEntry* add_entry(int index, unsigned int hash, Handle protection_domain);
   ProtectionDomainCacheEntry* find_entry(int index, Handle protection_domain);
 
+  bool _dead_entries;
+
 public:
   ProtectionDomainCacheTable(int table_size);
   ProtectionDomainCacheEntry* get(Handle protection_domain);
@@ -93,6 +95,9 @@
 
   void print_on(outputStream* st) const;
   void verify();
+
+  bool has_work() { return _dead_entries; }
+  void trigger_cleanup();
 };