1 /* 2 * Copyright (c) 2014, 2016, Oracle and/or its affiliates. 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 /* 25 * @test TestWBGC 26 * @bug 8055098 27 * @summary Test verify that WB methods isObjectInOldGen and youngGC works correctly. 28 * @library /test/lib 29 * @modules java.base/jdk.internal.misc 30 * java.management 31 * @build sun.hotspot.WhiteBox 32 * @run driver ClassFileInstaller sun.hotspot.WhiteBox 33 * @run driver TestWBGC 34 */ 35 import jdk.test.lib.Asserts; 36 import jdk.test.lib.process.ProcessTools; 37 import jdk.test.lib.process.OutputAnalyzer; 38 import sun.hotspot.WhiteBox; 39 40 public class TestWBGC { 41 42 public static void main(String args[]) throws Exception { 43 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 44 true, 45 "-Xbootclasspath/a:.", 46 "-XX:+UnlockDiagnosticVMOptions", 47 "-XX:+WhiteBoxAPI", 48 "-XX:MaxTenuringThreshold=1", 49 "-Xlog:gc", 50 GCYoungTest.class.getName()); 51 52 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 53 System.out.println(output.getStdout()); 54 output.shouldHaveExitValue(0); 55 output.shouldContain("WhiteBox Initiated Young GC"); 56 output.shouldNotContain("Full"); 57 // To be sure that we don't provoke Full GC additionaly to young 58 } 59 60 public static class GCYoungTest { 61 static WhiteBox wb = WhiteBox.getWhiteBox(); 62 public static Object obj; 63 64 public static void main(String args[]) { 65 obj = new Object(); 66 Asserts.assertFalse(wb.isObjectInOldGen(obj)); 67 wb.youngGC(); 68 wb.youngGC(); 69 // 2 young GC is needed to promote object into OldGen 70 Asserts.assertTrue(wb.isObjectInOldGen(obj)); 71 } 72 } 73 }