--- old/src/hotspot/share/utilities/globalDefinitions.hpp	2018-11-16 19:18:37.662006188 -0800
+++ new/src/hotspot/share/utilities/globalDefinitions.hpp	2018-11-16 19:18:37.393995988 -0800
@@ -1261,4 +1261,17 @@
 typedef const char* ccstr;
 typedef const char* ccstrlist;   // represents string arguments which accumulate
 
+//----------------------------------------------------------------------------------------------------
+// Default hash/equals functions used by ResourceHashtable and KVHashtable
+
+template<typename K> unsigned primitive_hash(const K& k) {
+  unsigned hash = (unsigned)((uintptr_t)k);
+  return hash ^ (hash >> 3); // just in case we're dealing with aligned ptrs
+}
+
+template<typename K> bool primitive_equals(const K& k0, const K& k1) {
+  return k0 == k1;
+}
+
+
 #endif // SHARE_VM_UTILITIES_GLOBALDEFINITIONS_HPP