--- /dev/null	2017-03-07 11:44:12.271151064 +0100
+++ new/src/hotspot/share/gc/shared/gcArguments.hpp	2017-10-25 16:45:24.416405209 +0200
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2017, Red Hat, Inc. and/or its affiliates.
+ * 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_SHARED_GCARGUMENTS_HPP
+#define SHARE_GC_SHARED_GCARGUMENTS_HPP
+
+#include "memory/allocation.hpp"
+
+class GCArguments : public CHeapObj<mtGC> {
+private:
+  static GCArguments* _instance;
+
+  static void select_gc();
+  static void select_gc_ergonomically();
+  static bool gc_selected();
+
+public:
+  static jint create_instance();
+  static bool is_initialized();
+  static GCArguments* instance();
+
+  virtual void initialize_flags();
+
+  virtual size_t conservative_max_heap_alignment() = 0;
+};
+
+#endif // SHARE_GC_SHARED_GCARGUMENTS_HPP