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 compiler.c2.Test6935022 31 */ 32 33 package compiler.c2; 34 35 public class Test6935022 { 36 public static final void main(String[] args) throws Exception { 37 Test6935022 test = new Test6935022(); 38 39 int cnt = 0; 40 41 while (cnt < 10000) { 42 try { 43 ++cnt; 44 if ((cnt&1023) == 0) 45 System.out.println("Thread="+Thread.currentThread().getName() + " iteration: " + cnt); 46 test.loop(2147483647, (cnt&1023)); 47 } 48 49 catch (Exception e) { 50 System.out.println("Caught on iteration " + cnt); 51 e.printStackTrace(); 52 System.exit(97); 53 } 54 } 55 } 56 57 private void loop(int endingRow, int mask) throws Exception { 58 int rows = 1; 59 boolean next = true; 60 61 while(rows <= endingRow && next) { 62 rows++; 63 if (rows == mask) 64 System.out.println("Rows="+rows+", end="+endingRow+", next="+next); 65 next = next(rows); 66 } 67 68 if (next) 69 throw new Exception("Ended on rows(no rs): " + rows); 70 } 71 72 private boolean next(int rows) { 73 return rows < 12; 74 } 75 } 76