1 /* 2 * Copyright (c) 2009, 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 /** 26 * @test 27 * @bug 6826736 28 * @summary CMS: core dump with -XX:+UseCompressedOops 29 * 30 * @run main/othervm/timeout=600 -XX:+IgnoreUnrecognizedVMOptions -Xbatch -XX:+ScavengeALot -XX:+UseCompressedOops -XX:HeapBaseMinAddress=32g -XX:CompileThreshold=100 -XX:CompileOnly=Test.test -XX:-BlockLayoutRotateLoops -XX:LoopUnrollLimit=0 Test 31 */ 32 33 public class Test { 34 int[] arr; 35 int[] arr2; 36 int test(int r) { 37 for (int i = 0; i < 100; i++) { 38 for (int j = i; j < 100; j++) { 39 int a = 0; 40 for (long k = 0; k < 100; k++) { 41 a += k; 42 } 43 if (arr != null) 44 a = arr[j]; 45 r += a; 46 } 47 } 48 return r; 49 } 50 51 public static void main(String[] args) { 52 int r = 0; 53 Test t = new Test(); 54 for (int i = 0; i < 100; i++) { 55 t.arr = new int[100]; 56 r = t.test(r); 57 } 58 System.out.println("Warmup 1 is done."); 59 for (int i = 0; i < 100; i++) { 60 t.arr = null; 61 r = t.test(r); 62 } 63 System.out.println("Warmup 2 is done."); 64 for (int i = 0; i < 100; i++) { 65 t.arr = new int[100]; 66 r = t.test(r); 67 } 68 System.out.println("Warmup is done."); 69 for (int i = 0; i < 100; i++) { 70 t.arr = new int[1000000]; 71 t.arr = null; 72 r = t.test(r); 73 } 74 } 75 }