1 /* 2 * Copyright (c) 2017, 2018, Red Hat, Inc. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import java.lang.management.GarbageCollectorMXBean; 25 import java.lang.management.ManagementFactory; 26 27 /* 28 * @test TestEnabled 29 * @key gc 30 * @requires vm.gc.Shenandoah & vm.gc == "null" 31 * @run main/othervm -Dexpected=false -Xmx64m TestEnabled 32 * @run main/othervm -Dexpected=true -Xmx64m -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC TestEnabled 33 */ 34 35 /* 36 * @test TestEnabledAlready 37 * @key gc 38 * @requires vm.gc.Shenandoah & vm.gc == "Shenandoah" 39 * @run main/othervm -Dexpected=true -Xmx64m TestEnabled 40 */ 41 public class TestEnabled { 42 43 public static void main(String... args) { 44 boolean expected = Boolean.getBoolean("expected"); 45 boolean actual = isEnabled(); 46 if (expected != actual) { 47 throw new IllegalStateException("Error: expected = " + expected + ", actual = " + actual); 48 } 49 } 50 51 public static boolean isEnabled() { 52 for (GarbageCollectorMXBean bean : ManagementFactory.getGarbageCollectorMXBeans()) { 53 if (bean.getName().contains("Shenandoah")) { 54 return true; 55 } 56 } 57 return false; 58 } 59 60 }