--- a/src/hotspot/share/prims/whitebox.cpp	Fri Aug 31 09:10:27 2018 -0400
+++ b/src/hotspot/share/prims/whitebox.cpp	Fri Aug 31 10:22:04 2018 -0400
@@ -28,6 +28,7 @@
 
 #include "classfile/classLoaderData.hpp"
 #include "classfile/modules.hpp"
+#include "classfile/protectionDomainCache.hpp"
 #include "classfile/stringTable.hpp"
 #include "code/codeCache.hpp"
 #include "compiler/methodMatcher.hpp"
@@ -1977,6 +1978,10 @@
   return (jint) ResolvedMethodTable::removed_entries_count();
 WB_END
 
+WB_ENTRY(jint, WB_ProtectionDomainRemovedCount(JNIEnv* env, jobject o))
+  return (jint) SystemDictionary::pd_cache_table()->removed_entries_count();
+WB_END
+
 
 #define CC (char*)
 
@@ -2199,6 +2204,7 @@
   {CC"printOsInfo",               CC"()V",            (void*)&WB_PrintOsInfo },
   {CC"disableElfSectionCache",    CC"()V",            (void*)&WB_DisableElfSectionCache },
   {CC"resolvedMethodRemovedCount",     CC"()I",       (void*)&WB_ResolvedMethodRemovedCount },
+  {CC"protectionDomainRemovedCount",   CC"()I",       (void*)&WB_ProtectionDomainRemovedCount },
 };