diff a/src/hotspot/share/gc/shenandoah/shenandoahStackChunkGCData.hpp b/src/hotspot/share/gc/shenandoah/shenandoahStackChunkGCData.hpp
--- /dev/null
+++ b/src/hotspot/share/gc/shenandoah/shenandoahStackChunkGCData.hpp
@@ -0,0 +1,48 @@
+/*
+ * Copyright Amazon.com Inc. 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_GC_SHENANDOAH_SHENANDOAHSTACKCHUNKGCDATA_HPP
+#define SHARE_GC_SHENANDOAH_SHENANDOAHSTACKCHUNKGCDATA_HPP
+
+#include "oops/oopsHierarchy.hpp"
+#include "runtime/atomic.hpp"
+
+class ShenandoahStackChunkGCData {
+private:
+  // Monotonically increasing epoch counter.
+  // Must not wrap to track the epoch accurately.
+  static Atomic<int64_t> _epoch_id_counter;
+
+  // The GC epoch when chunk was allocated.
+  int64_t _epoch;
+
+  static ShenandoahStackChunkGCData* data(stackChunkOop chunk);
+
+public:
+  static void change_epoch_id();
+
+  static void initialize(stackChunkOop chunk);
+  static bool is_different_epoch(stackChunkOop chunk);
+};
+
+#endif // SHARE_GC_SHENANDOAH_SHENANDOAHSTACKCHUNKGCDATA_HPP