author | mikael |
Mon, 29 Jul 2019 09:59:04 -0700 | |
changeset 57584 | 9d82a35b6ff7 |
parent 47216 | 71c04702a3d5 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2009, 2012, 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 6799583 |
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* |
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* @summary Test verifes that LogManager shutdown hook does not cause |
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* an application classloader leaks. |
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* |
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* @run main/othervm ClassLoaderLeakTest |
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*/ |
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import java.io.File; |
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import java.lang.ref.WeakReference; |
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import java.lang.reflect.Constructor; |
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import java.lang.reflect.Method; |
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import java.net.MalformedURLException; |
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import java.net.URL; |
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import java.net.URLClassLoader; |
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import java.util.concurrent.CountDownLatch; |
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import java.util.logging.Logger; |
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public class ClassLoaderLeakTest { |
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private static CountDownLatch doneSignal; |
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private static CountDownLatch launchSignal; |
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private static ThreadGroup appsThreadGroup; |
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private static Throwable launchFailure = null; |
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public static void main(String[] args) { |
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appsThreadGroup = new ThreadGroup("MyAppsThreadGroup"); |
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doneSignal = new CountDownLatch(1); |
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launchSignal = new CountDownLatch(1); |
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Runnable launcher = new Runnable() { |
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public void run() { |
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try { |
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ClassLoader cl = |
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Thread.currentThread().getContextClassLoader(); |
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Class<?> appMain = cl.loadClass("AppTest"); |
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Method launch = |
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appMain.getDeclaredMethod("launch", doneSignal.getClass()); |
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Constructor<?> c = appMain.getConstructor(); |
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Object o = c.newInstance(); |
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launch.invoke(o, doneSignal); |
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} catch (Throwable e) { |
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launchFailure = e; |
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} finally { |
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launchSignal.countDown(); |
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} |
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} |
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}; |
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/* prepare test class loader */ |
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URL pwd = null; |
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try { |
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pwd = new File(System.getProperty("test.classes",".")).toURI().toURL(); |
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} catch (MalformedURLException e) { |
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throw new RuntimeException("Test failed.", e); |
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} |
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URL[] urls = new URL[] { pwd }; |
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MyClassLoader appClassLoader = new MyClassLoader(urls, "test0"); |
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WeakReference<MyClassLoader> ref = |
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6880112: Project Coin: Port JDK core library code to use diamond operator
smarks
parents:
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new WeakReference<>(appClassLoader); |
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Thread appThread = new Thread(appsThreadGroup, launcher, "AppThread-0"); |
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appThread.setContextClassLoader(appClassLoader); |
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appThread.start(); |
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appClassLoader = null; |
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launcher = null; |
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appThread = null; |
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/* wait for laucnh completion */ |
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try { |
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launchSignal.await(); |
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} catch (InterruptedException e) { |
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} |
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/* check if launch failed */ |
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if (launchFailure != null) { |
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throw new RuntimeException("Test failed.", launchFailure); |
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} |
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/* wait for test app excution completion */ |
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try { |
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doneSignal.await(); |
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} catch (InterruptedException e) { |
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} |
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/* give a chence to GC */ |
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waitAndGC(5); |
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if (ref.get() != null) { |
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throw new RuntimeException("Test failed: classloader is still alive"); |
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} |
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System.out.println("Test passed."); |
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} |
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private static class MyClassLoader extends URLClassLoader { |
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private static boolean verbose = |
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Boolean.getBoolean("verboseClassLoading"); |
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private String uniqClassName; |
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public MyClassLoader(URL[] urls, String uniq) { |
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super(urls); |
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uniqClassName = uniq; |
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} |
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public Class<?> loadClass(String name) throws ClassNotFoundException { |
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if (verbose) { |
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System.out.printf("%s: load class %s\n", uniqClassName, name); |
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} |
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if (uniqClassName.equals(name)) { |
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return Object.class; |
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} |
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return super.loadClass(name); |
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} |
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public String toString() { |
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return "MyClassLoader(" + uniqClassName + ")"; |
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} |
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} |
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private static void waitAndGC(int sec) { |
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int cnt = sec; |
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System.out.print("Wait "); |
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while (cnt-- > 0) { |
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try { |
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Thread.sleep(1000); |
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} catch (InterruptedException e) { |
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} |
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// do GC every 3 seconds |
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if (cnt % 3 == 2) { |
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System.gc(); |
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System.out.print("+"); |
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} else { |
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System.out.print("."); |
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} |
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//checkErrors(); |
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} |
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System.out.println(""); |
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} |
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} |
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class AppTest { |
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public AppTest() { |
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} |
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public void launch(CountDownLatch done) { |
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Logger log = Logger.getLogger("app_test_logger"); |
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log.fine("Test app is launched"); |
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done.countDown(); |
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} |
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} |