--- /dev/null	2018-09-20 14:01:57.720065554 +0200
+++ new/src/hotspot/share/gc/g1/g1OopStarChunkedList.cpp	2018-11-27 18:22:20.526862016 +0100
@@ -0,0 +1,53 @@
+/*
+ * Copyright (c) 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.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "gc/g1/g1OopStarChunkedList.inline.hpp"
+
+size_t G1OopStarChunkedList::free_chunk_lists() {
+  size_t freed_memory = 0;
+
+  freed_memory += delete_list(_roots);
+  freed_memory += delete_list(_croots);
+  freed_memory += delete_list(_oops);
+  freed_memory += delete_list(_coops);
+
+  _roots  = NULL;
+  _croots = NULL;
+  _oops   = NULL;
+  _coops  = NULL;
+
+  return freed_memory;
+}
+
+G1OopStarChunkedList::~G1OopStarChunkedList() {
+  assert(free_chunk_lists() == 0, "Should be nothing left to free");
+}
+
+void G1OopStarChunkedList::oops_do(OopClosure* obj_cl, OopClosure* root_cl) {
+  chunks_do(_roots, root_cl);
+  chunks_do(_croots, root_cl);
+  chunks_do(_oops, obj_cl);
+  chunks_do(_coops, obj_cl);
+}