105 lines
3.6 KiB
Java
105 lines
3.6 KiB
Java
/*
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* Copyright (c) 2010, 2016, 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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import java.util.Properties;
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import java.util.concurrent.CyclicBarrier;
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import java.util.concurrent.BrokenBarrierException;
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import java.io.IOException;
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import java.net.URL;
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/* @test
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* @bug 6977738 8029891
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* @summary Test ClassLoader.getResource() that should not deadlock
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# if another thread is holding the system properties object
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*
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* @build GetResource
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* @run main GetResource
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*/
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public class GetResource {
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CyclicBarrier go = new CyclicBarrier(2);
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CyclicBarrier done = new CyclicBarrier(2);
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Thread t1, t2;
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public GetResource() {
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t1 = new Thread() {
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public void run() {
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Properties prop = System.getProperties();
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synchronized (prop) {
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System.out.println("Thread 1 ready");
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try {
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go.await();
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prop.put("property", "value");
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prop.store(System.out, "");
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done.await(); // keep holding the lock until t2 finishes
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} catch (InterruptedException e) {
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throw new RuntimeException(e);
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} catch (BrokenBarrierException e) {
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throw new RuntimeException(e);
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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}
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System.out.println("Thread 1 exits");
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}
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};
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t2 = new Thread() {
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public void run() {
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System.out.println("Thread 2 ready");
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try {
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go.await(); // wait until t1 holds the lock of the system properties
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URL u1 = Thread.currentThread().getContextClassLoader().getResource("unknownresource");
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done.await();
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} catch (InterruptedException e) {
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throw new RuntimeException(e);
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} catch (BrokenBarrierException e) {
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throw new RuntimeException(e);
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}
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System.out.println("Thread 2 exits");
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}
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};
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}
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public void run() throws Exception {
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t1.start();
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t2.start();
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try {
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t1.join();
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} catch (InterruptedException e) {
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e.printStackTrace();
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throw e;
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}
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try {
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t2.join();
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} catch (InterruptedException e) {
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e.printStackTrace();
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throw e;
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}
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}
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public static void main(String[] args) throws Exception {
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new GetResource().run();
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}
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}
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