1 /* 2 * Copyright (c) 2014, 2015, 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 /testlibrary /test/lib 29 * @modules java.base/sun.misc 30 * java.management 31 * @build TestWBGC 32 * @run main ClassFileInstaller sun.hotspot.WhiteBox 33 * @run driver TestWBGC 34 */ 35 import jdk.test.lib.*; 36 import sun.hotspot.WhiteBox; 37 38 public class TestWBGC { 39 40 public static void main(String args[]) throws Exception { 41 ProcessBuilder pb = ProcessTools.createJavaProcessBuilder( 42 true, 43 "-Xbootclasspath/a:.", 44 "-XX:+UnlockDiagnosticVMOptions", 45 "-XX:+WhiteBoxAPI", 46 "-XX:MaxTenuringThreshold=1", 47 "-XX:+PrintGC", 48 GCYoungTest.class.getName()); 49 50 OutputAnalyzer output = new OutputAnalyzer(pb.start()); 51 System.out.println(output.getStdout()); 52 output.shouldHaveExitValue(0); 53 output.shouldContain("WhiteBox Initiated Young GC"); 54 output.shouldNotContain("Full"); 55 // To be sure that we don't provoke Full GC additionaly to young 56 } 57 58 public static class GCYoungTest { 59 static WhiteBox wb = WhiteBox.getWhiteBox(); 60 public static Object obj; 61 62 public static void main(String args[]) { 63 obj = new Object(); 64 Asserts.assertFalse(wb.isObjectInOldGen(obj)); 65 wb.youngGC(); 66 wb.youngGC(); 67 // 2 young GC is needed to promote object into OldGen 68 Asserts.assertTrue(wb.isObjectInOldGen(obj)); 69 } 70 } 71 }