129 lines
4.1 KiB
Java
129 lines
4.1 KiB
Java
/*
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* Copyright (c) 2019, 2020, 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 8225690
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* @requires os.family != "windows"
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* @library /test/lib
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* @modules jdk.attach/com.sun.tools.attach
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* @run main ConcAttachTest
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*/
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import java.io.IOException;
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import java.util.concurrent.CountDownLatch;
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import java.util.concurrent.Executors;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.TimeUnit;
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import com.sun.tools.attach.VirtualMachine;
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import com.sun.tools.attach.AttachNotSupportedException;
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import jdk.test.lib.Utils;
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import jdk.test.lib.apps.LingeredApp;
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import jdk.test.lib.Asserts;
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import jdk.test.lib.JDKToolLauncher;
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import jdk.test.lib.process.OutputAnalyzer;
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public class ConcAttachTest implements Runnable {
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private static final int NUM_CONC_REQUESTS = 100;
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private static final int THREAD_POOL_TIMEOUT_IN_SEC = 30;
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private static CountDownLatch latch;
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private static String strPID;
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// Attach to LingeredApp concurrently.
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public void run() {
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VirtualMachine vm = null;
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try {
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latch.countDown();
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latch.await();
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} catch (InterruptedException e) {
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throw new RuntimeException(e);
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}
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try {
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vm = VirtualMachine.attach(strPID);
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} catch (AttachNotSupportedException | IOException e) {
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throw new RuntimeException(e);
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} finally {
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try {
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vm.detach();
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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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}
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private static void checkAttachListenerThread() throws InterruptedException, IOException {
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JDKToolLauncher jcmd = JDKToolLauncher.createUsingTestJDK("jcmd");
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jcmd.addVMArgs(Utils.getTestJavaOpts());
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jcmd.addToolArg(strPID);
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jcmd.addToolArg("Thread.print");
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ProcessBuilder pb = new ProcessBuilder(jcmd.getCommand());
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Process jcmdProc = pb.start();
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OutputAnalyzer out = new OutputAnalyzer(jcmdProc);
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jcmdProc.waitFor();
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System.out.println(out.getStdout());
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System.err.println(out.getStderr());
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long numOfAttachListener = out.asLines()
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.stream()
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.filter(l -> l.contains("Attach Listener"))
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.count();
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Asserts.assertEquals(1L, numOfAttachListener, "AttachListener should exist only 1 thread.");
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}
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public static void main(String... args) throws Exception {
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LingeredApp app = null;
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latch = new CountDownLatch(NUM_CONC_REQUESTS);
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ExecutorService pool = Executors.newFixedThreadPool(NUM_CONC_REQUESTS);
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try {
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app = LingeredApp.startApp();
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strPID = Long.toString(app.getPid());
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for (int i = 0; i < NUM_CONC_REQUESTS; i++) {
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pool.submit(new ConcAttachTest());
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}
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pool.shutdown();
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pool.awaitTermination(THREAD_POOL_TIMEOUT_IN_SEC, TimeUnit.SECONDS);
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checkAttachListenerThread();
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} finally {
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LingeredApp.stopApp(app);
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}
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}
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}
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