--- /dev/null	2019-02-14 11:31:37.500399000 +0100
+++ new/src/hotspot/share/gc/z/zNMethodAllocator.hpp	2019-02-20 21:52:17.511960723 +0100
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2019, 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_GC_Z_ZNMETHODALLOCATOR_HPP
+#define SHARE_GC_Z_ZNMETHODALLOCATOR_HPP
+
+#include "memory/allocation.hpp"
+#include "gc/z/zArray.hpp"
+
+class ZNMethodAllocator : AllStatic {
+private:
+  static ZArray<void*> _deferred_frees;
+  static bool          _defer_frees;
+
+  static void immediate_free(void* data);
+  static void deferred_free(void* data);
+
+public:
+  static void* allocate(size_t size);
+  static void  free(void* data);
+
+  static void activate_deferred_frees();
+  static void deactivate_and_process_deferred_frees();
+};
+
+#endif // SHARE_GC_Z_ZNMETHODALLOCATOR_HPP