108 lines
3.0 KiB
Java
108 lines
3.0 KiB
Java
/*
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* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/**
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* @test
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* @bug 8014477
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* @summary test String.contentEquals(StringBuffer)
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*/
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public class StringContentEqualsBug {
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abstract static class Task extends Thread {
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volatile StringBuffer sb;
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volatile Exception exception;
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Task(StringBuffer sb) {
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this.sb = sb;
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}
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@Override
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public void run() {
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try {
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StringBuffer sb;
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while ((sb = this.sb) != null) {
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doWith(sb);
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}
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}
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catch (Exception e) {
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exception = e;
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}
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}
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protected abstract void doWith(StringBuffer sb);
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}
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static class Tester extends Task {
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Tester(StringBuffer sb) {
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super(sb);
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}
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@Override
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protected void doWith(StringBuffer sb) {
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"AA".contentEquals(sb);
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}
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}
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static class Disturber extends Task {
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Disturber(StringBuffer sb) {
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super(sb);
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}
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@Override
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protected void doWith(StringBuffer sb) {
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sb.setLength(0);
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sb.trimToSize();
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sb.append("AA");
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}
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}
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public static void main(String[] args) throws Exception {
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StringBuffer sb = new StringBuffer();
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Task[] tasks = new Task[3];
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(tasks[0] = new Tester(sb)).start();
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for (int i = 1; i < tasks.length; i++) {
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(tasks[i] = new Disturber(sb)).start();
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}
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try
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{
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// wait at most 5 seconds for any of the threads to throw exception
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for (int i = 0; i < 20; i++) {
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for (Task task : tasks) {
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if (task.exception != null) {
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throw task.exception;
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}
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}
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Thread.sleep(250L);
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}
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}
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finally {
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for (Task task : tasks) {
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task.sb = null;
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task.join();
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}
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}
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}
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}
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