--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/gc/shared/gcConfiguration.hpp	Tue May 15 20:24:34 2018 +0200
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2012, 2018, 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_GC_SHARED_GCCONFIGURATION_HPP
+#define SHARE_VM_GC_SHARED_GCCONFIGURATION_HPP
+
+#include "gc/shared/gcName.hpp"
+#include "memory/universe.hpp"
+#include "utilities/globalDefinitions.hpp"
+
+class GCConfiguration {
+ public:
+  GCName young_collector() const;
+  GCName old_collector() const;
+  uint num_parallel_gc_threads() const;
+  uint num_concurrent_gc_threads() const;
+  bool uses_dynamic_gc_threads() const;
+  bool is_explicit_gc_concurrent() const;
+  bool is_explicit_gc_disabled() const;
+  uintx gc_time_ratio() const;
+
+  bool has_pause_target_default_value() const;
+  uintx pause_target() const;
+};
+
+class GCTLABConfiguration {
+ public:
+  bool uses_tlabs() const;
+  size_t min_tlab_size() const;
+  uint tlab_refill_waste_limit() const;
+};
+
+class GCSurvivorConfiguration {
+ public:
+  intx initial_tenuring_threshold() const;
+  intx max_tenuring_threshold() const;
+};
+
+class GCHeapConfiguration {
+ public:
+  size_t max_size() const;
+  size_t min_size() const;
+  size_t initial_size() const;
+  bool uses_compressed_oops() const;
+  Universe::NARROW_OOP_MODE narrow_oop_mode() const;
+  uint object_alignment_in_bytes() const;
+  int heap_address_size_in_bits() const;
+};
+
+class GCYoungGenerationConfiguration {
+ public:
+  bool has_max_size_default_value() const;
+  uintx max_size() const;
+
+  uintx min_size() const;
+  intx new_ratio() const;
+};
+
+#endif // SHARE_VM_GC_SHARED_GCCONFIGURATION_HPP