1 /* 2 * Copyright (c) 2017, 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 * @test TestRefArrays 26 * @key gc 27 * @requires vm.gc.Epsilon 28 * @summary Epsilon is able to allocate arrays, and does not corrupt their state 29 * @library /test/lib 30 * 31 * @run main/othervm -Xmx1g -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestRefArrays 32 * @run main/othervm -Xmx1g -Xint -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestRefArrays 33 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestRefArrays 34 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestRefArrays 35 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:-TieredCompilation -XX:+UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestRefArrays 36 * 37 * @run main/othervm -Xmx1g -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestRefArrays 38 * @run main/othervm -Xmx1g -Xint -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestRefArrays 39 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestRefArrays 40 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:TieredStopAtLevel=1 -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestRefArrays 41 * @run main/othervm -Xmx1g -Xbatch -Xcomp -XX:-TieredCompilation -XX:-UseTLAB -XX:+UnlockExperimentalVMOptions -XX:+UseEpsilonGC TestRefArrays 42 */ 43 44 import java.util.Random; 45 46 public class TestRefArrays { 47 48 static long SEED = Long.getLong("seed", System.nanoTime()); 49 static int COUNT = Integer.getInteger("count", 1000); // ~500 MB allocation 50 51 static MyObject[][] arr; 52 53 public static void main(String[] args) throws Exception { 54 Random r = new Random(SEED); 55 56 arr = new MyObject[COUNT * 100][]; 57 for (int c = 0; c < COUNT; c++) { 58 arr[c] = new MyObject[c * 100]; 59 for (int v = 0; v < c; v++) { 60 arr[c][v] = new MyObject(r.nextInt()); 61 } 62 } 63 64 r = new Random(SEED); 65 for (int c = 0; c < COUNT; c++) { 66 MyObject[] b = arr[c]; 67 if (b.length != (c * 100)) { 68 throw new IllegalStateException("Failure: length = " + b.length + ", need = " + (c*100)); 69 } 70 for (int v = 0; v < c; v++) { 71 int actual = b[v].id(); 72 int expected = r.nextInt(); 73 if (actual != expected) { 74 throw new IllegalStateException("Failure: expected = " + expected + ", actual = " + actual); 75 } 76 } 77 } 78 } 79 80 public static class MyObject { 81 int id; 82 public MyObject(int id) { 83 this.id = id; 84 } 85 public int id() { 86 return id; 87 } 88 } 89 }