1 /* 2 * Copyright (c) 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 TestRegionLivenessPrint.java 26 * @bug 8151920 27 * @requires vm.gc=="G1" | vm.gc=="null" 28 * @summary Make sure that G1 does not assert when printing region liveness data on a humongous continues region. 29 * @key gc 30 * @library /testlibrary /test/lib 31 * @modules java.base/jdk.internal.misc 32 * @build TestRegionLivenessPrint 33 * @run main ClassFileInstaller sun.hotspot.WhiteBox 34 * sun.hotspot.WhiteBox$WhiteBoxPermission 35 * @run main/othervm -Xbootclasspath/a:. -XX:+WhiteBoxAPI -XX:+UseG1GC -Xmx128M -XX:G1HeapRegionSize=1m -Xlog:gc+liveness=trace TestRegionLivenessPrint 36 */ 37 38 import sun.hotspot.WhiteBox; 39 40 public class TestRegionLivenessPrint { 41 42 static byte[] bigobj = new byte[1024* 1024 * 2]; 43 44 public static void main(String[] args) throws InterruptedException { 45 WhiteBox wb = WhiteBox.getWhiteBox(); 46 // Run a concurrent mark cycle to trigger the liveness accounting log messages. 47 wb.g1StartConcMarkCycle(); 48 while (wb.g1InConcurrentMark()) { 49 Thread.sleep(100); 50 } 51 } 52 53 }