1 /* 2 * Copyright (c) 2011, 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 6935022 28 * @summary Server VM incorrectly breaks out of while loop 29 * 30 * @run main Test6935022 31 */ 32 33 public class Test6935022 { 34 public static final void main(String[] args) throws Exception { 35 Test6935022 test = new Test6935022(); 36 37 int cnt = 0; 38 39 while (cnt < 10000) { 40 try { 41 ++cnt; 42 if ((cnt&1023) == 0) 43 System.out.println("Thread="+Thread.currentThread().getName() + " iteration: " + cnt); 44 test.loop(2147483647, (cnt&1023)); 45 } 46 47 catch (Exception e) { 48 System.out.println("Caught on iteration " + cnt); 49 e.printStackTrace(); 50 System.exit(97); 51 } 52 } 53 } 54 55 private void loop(int endingRow, int mask) throws Exception { 56 int rows = 1; 57 boolean next = true; 58 59 while(rows <= endingRow && next) { 60 rows++; 61 if (rows == mask) 62 System.out.println("Rows="+rows+", end="+endingRow+", next="+next); 63 next = next(rows); 64 } 65 66 if (next) 67 throw new Exception("Ended on rows(no rs): " + rows); 68 } 69 70 private boolean next(int rows) { 71 return rows < 12; 72 } 73 } 74