--- old/src/hotspot/share/classfile/classLoaderData.cpp	2020-08-18 21:51:54.242176281 -0700
+++ new/src/hotspot/share/classfile/classLoaderData.cpp	2020-08-18 21:51:54.126171914 -0700
@@ -968,3 +968,14 @@
   }
   return false;
 }
+
+Klass* ClassLoaderData::find_class(Symbol* name) {
+  Dictionary* dict = dictionary();
+  unsigned hash  = dict->compute_hash(name);
+  int      index = dict->hash_to_index(hash);
+  {
+    // find_class assert on SystemDictionary_lock or safepoint
+    MutexLocker lock(SystemDictionary_lock);
+    return dict->find_class(index, hash, name);
+  }
+}