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