diff -r 4ebc2e2fb97c -r 71c04702a3d5 src/hotspot/share/classfile/klassFactory.hpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/classfile/klassFactory.hpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,86 @@
+/*
+* Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.
+* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+*
+* This code is free software; you can redistribute it and/or modify it
+* under the terms of the GNU General Public License version 2 only, as
+* published by the Free Software Foundation.
+*
+* This code is distributed in the hope that it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+* version 2 for more details (a copy is included in the LICENSE file that
+* accompanied this code).
+*
+* You should have received a copy of the GNU General Public License version
+* 2 along with this work; if not, write to the Free Software Foundation,
+* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+*
+* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+* or visit www.oracle.com if you need additional information or have any
+* questions.
+*
+*/
+
+#ifndef SHARE_VM_CLASSFILE_KLASSFACTORY_HPP
+#define SHARE_VM_CLASSFILE_KLASSFACTORY_HPP
+
+#include "memory/allocation.inline.hpp"
+#include "runtime/handles.hpp"
+
+class ClassFileStream;
+class ClassLoaderData;
+template <typename>
+class GrowableArray;
+class Klass;
+class Symbol;
+class TempNewSymbol;
+
+/*
+ * KlassFactory is an interface to implementations of the following mapping/function:
+ *
+ * Summary: create a VM internal runtime representation ("Klass")
+            from a bytestream (classfile).
+ *
+ * Input:  a named bytestream in the Java class file format (see JVMS, chapter 4).
+ * Output: a VM runtime representation of a Java class
+ *
+ * Pre-conditions:
+ *   a non-NULL ClassFileStream* // the classfile bytestream
+ *   a non-NULL Symbol*          // the name of the class
+ *   a non-NULL ClassLoaderData* // the metaspace allocator
+ *   (no pending exceptions)
+ *
+ * Returns:
+ *   if the returned value is non-NULL, that value is an indirection (pointer/handle)
+ *   to a Klass. The caller will not have a pending exception.
+ *
+ *   On broken invariants and/or runtime errors the returned value will be
+ *   NULL (or a NULL handle) and the caller *might* now have a pending exception.
+ *
+ */
+
+class KlassFactory : AllStatic {
+
+  // approved clients
+  friend class ClassLoader;
+  friend class ClassLoaderExt;
+  friend class SystemDictionary;
+
+ private:
+  static InstanceKlass* create_from_stream(ClassFileStream* stream,
+                                           Symbol* name,
+                                           ClassLoaderData* loader_data,
+                                           Handle protection_domain,
+                                           const InstanceKlass* host_klass,
+                                           GrowableArray<Handle>* cp_patches,
+                                           TRAPS);
+ public:
+  static InstanceKlass* check_shared_class_file_load_hook(
+                                          InstanceKlass* ik,
+                                          Symbol* class_name,
+                                          Handle class_loader,
+                                          Handle protection_domain, TRAPS);
+};
+
+#endif // SHARE_VM_CLASSFILE_KLASSFACTORY_HPP