1 /* 2 * Copyright 2012 Skip Balk. 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 26 * @bug 7179138 27 * @summary Incorrect result with String concatenation optimization 28 * @run main/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -XX:-TieredCompilation Test7179138_2 29 * 30 * @author Skip Balk 31 */ 32 33 public class Test7179138_2 { 34 public static void main(String[] args) throws Exception { 35 System.out.println("Java Version: " + System.getProperty("java.vm.version")); 36 long[] durations = new long[60]; 37 for (int i = 0; i < 100000; i++) { 38 // this empty for-loop is required to reproduce this bug 39 for (long duration : durations) { 40 // do nothing 41 } 42 { 43 String s = "test"; 44 int len = s.length(); 45 46 s = s + s; 47 len = len + len; 48 49 s = s + s; 50 len = len + len; 51 52 s = s + s; 53 len = len + len; 54 55 if (s.length() != len) { 56 System.out.println("Failed at iteration: " + i); 57 System.out.println("Length mismatch: " + s.length() + " <> " + len); 58 System.out.println("Expected: \"" + "test" + "test" + "test" + "test" + "test" + "test" + "test" + "test" + "\""); 59 System.out.println("Actual: \"" + s + "\""); 60 System.exit(0); 61 } 62 } 63 } 64 } 65 } 66