test/hotspot/jtreg/gc/shenandoah/TestStringDedup.java

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--- 1,8 ---
  /*
   * Copyright (c) 2017, 2021, Red Hat, Inc. All rights reserved.
+  * 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.

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   * @run main/othervm -Xmx256m -Xlog:gc+stats -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseStringDeduplication
   *      -XX:+UseShenandoahGC -XX:ShenandoahGCHeuristics=compact -XX:StringDeduplicationAgeThreshold=3
   *      TestStringDedup
   */
  
+ /*
+  * @test id=generational
+  * @summary Test Shenandoah string deduplication implementation
+  * @key randomness
+  * @requires vm.gc.Shenandoah
+  * @library /test/lib
+  * @modules java.base/java.lang:open
+  *          java.management
+  *
+  * @run main/othervm -Xmx256m -Xlog:gc+stats -XX:+UnlockDiagnosticVMOptions -XX:+UnlockExperimentalVMOptions -XX:+UseStringDeduplication
+  *      -XX:+UseShenandoahGC -XX:ShenandoahGCMode=generational -XX:StringDeduplicationAgeThreshold=3
+  *      TestStringDedup
+  */
+ 
  import java.lang.reflect.*;
  import java.util.*;
  import jdk.test.lib.Utils;
  
  public class TestStringDedup {