--- old/src/hotspot/share/classfile/classLoader.cpp	2020-06-08 16:46:08.277864729 -0700
+++ new/src/hotspot/share/classfile/classLoader.cpp	2020-06-08 16:46:07.977853436 -0700
@@ -1528,6 +1528,19 @@
     FileMapInfo::allocate_shared_path_table();
   }
 }
+
+// Helper function used by CDS code to get the number of module path
+// entries during shared classpath setup time.
+int ClassLoader::num_module_path_entries() {
+  Arguments::assert_is_dumping_archive();
+  int num_entries = 0;
+  ClassPathEntry* e= ClassLoader::_module_path_entries;
+  while (e != NULL) {
+    num_entries ++;
+    e = e->next();
+  }
+  return num_entries;
+}
 #endif
 
 jlong ClassLoader::classloader_time_ms() {