1 /* 2 * Copyright (c) 2016, 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 25 /* 26 * @test TestLargeObjectAlignment 27 * @summary Shenandoah crashes with -XX:ObjectAlignmentInBytes=16 28 * @key randomness 29 * @requires vm.gc.Shenandoah & !vm.graal.enabled & (vm.bits == "64") 30 * @library /test/lib 31 * 32 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ObjectAlignmentInBytes=16 -Xint TestLargeObjectAlignment 33 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ObjectAlignmentInBytes=16 -XX:-TieredCompilation TestLargeObjectAlignment 34 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ObjectAlignmentInBytes=16 -XX:TieredStopAtLevel=1 TestLargeObjectAlignment 35 * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+UseShenandoahGC -XX:ObjectAlignmentInBytes=16 -XX:TieredStopAtLevel=4 TestLargeObjectAlignment 36 */ 37 38 import java.util.ArrayList; 39 import java.util.List; 40 import java.util.Random; 41 import jdk.test.lib.Utils; 42 43 public class TestLargeObjectAlignment { 44 45 static final int SLABS_COUNT = Integer.getInteger("slabs", 10000); 46 static final int NODE_COUNT = Integer.getInteger("nodes", 10000); 47 static final long TIME_NS = 1000L * 1000L * Integer.getInteger("timeMs", 5000); 48 49 static Object[] objects; 50 51 public static void main(String[] args) throws Exception { 52 objects = new Object[SLABS_COUNT]; 53 54 long start = System.nanoTime(); 55 Random rng = Utils.getRandomInstance(); 56 while (System.nanoTime() - start < TIME_NS) { 57 objects[rng.nextInt(SLABS_COUNT)] = createSome(); 58 } 59 } 60 61 public static Object createSome() { 62 List<Integer> result = new ArrayList<Integer>(); 63 for (int c = 0; c < NODE_COUNT; c++) { 64 result.add(new Integer(c)); 65 } 66 return result; 67 } 68 69 }