--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/gc/g1/g1SurvivorRegions.cpp	Wed May 04 13:12:23 2016 +0200
@@ -0,0 +1,55 @@
+/*
+ * 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.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "gc/g1/g1SurvivorRegions.hpp"
+#include "gc/g1/heapRegion.hpp"
+#include "utilities/growableArray.hpp"
+#include "utilities/debug.hpp"
+
+G1SurvivorRegions::G1SurvivorRegions() : _regions(new (ResourceObj::C_HEAP, mtGC) GrowableArray<HeapRegion*>(8, true, mtGC)) {}
+
+void G1SurvivorRegions::add(HeapRegion* hr) {
+  assert(hr->is_survivor(), "should be flagged as survivor region");
+  _regions->append(hr);
+}
+
+uint G1SurvivorRegions::length() const {
+  return (uint)_regions->length();
+}
+
+void G1SurvivorRegions::convert_to_eden() {
+  for (GrowableArrayIterator<HeapRegion*> it = _regions->begin();
+       it != _regions->end();
+       ++it) {
+    HeapRegion* hr = *it;
+    hr->set_eden_pre_gc();
+  }
+  clear();
+}
+
+void G1SurvivorRegions::clear() {
+  _regions->clear();
+}
+