--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/runtime/commandLineFlagWriteableList.hpp	Tue May 10 12:10:21 2016 -0500
@@ -0,0 +1,68 @@
+/*
+ * Copyright (c) 2015, 2016, 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_RUNTIME_COMMANDLINEFLAGWRITEABLE_HPP
+#define SHARE_VM_RUNTIME_COMMANDLINEFLAGWRITEABLE_HPP
+
+#include "runtime/globals.hpp"
+#include "utilities/growableArray.hpp"
+
+class CommandLineFlagWriteable : public CHeapObj<mtArguments> {
+public:
+  enum WriteableType {
+    // can be set without any limits
+    Always           = 0,
+    // can only be set once, either via command lines or during runtime
+    Once             = 1,
+    // can only be set on command line (multiple times allowed)
+    CommandLineOnly  = 2
+  };
+private:
+  const char* _name;
+  WriteableType _type;
+  bool _writeable;
+  bool _startup_done;
+public:
+  // the "name" argument must be a string literal
+  CommandLineFlagWriteable(const char* name, WriteableType type) { _name=name; _type=type; _writeable=true; _startup_done=false; }
+  ~CommandLineFlagWriteable() {}
+  const char* name() { return _name; }
+  const WriteableType type() { return _type; }
+  bool is_writeable(void);
+  void mark_once(void);
+  void mark_startup(void);
+};
+
+class CommandLineFlagWriteableList : public AllStatic {
+  static GrowableArray<CommandLineFlagWriteable*>* _controls;
+public:
+  static void init();
+  static int length() { return (_controls != NULL) ? _controls->length() : 0; }
+  static CommandLineFlagWriteable* at(int i) { return (_controls != NULL) ? _controls->at(i) : NULL; }
+  static CommandLineFlagWriteable* find(const char* name);
+  static void add(CommandLineFlagWriteable* range) { _controls->append(range); }
+  static void mark_startup(void);
+};
+
+#endif // SHARE_VM_RUNTIME_COMMANDLINEFLAGWRITEABLE_HPP