84 lines
3.1 KiB
Java
84 lines
3.1 KiB
Java
/*
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* Copyright Amazon.com Inc. 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.awt.EventQueue;
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import java.lang.ref.Reference;
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import java.lang.ref.WeakReference;
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import java.net.URL;
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import java.net.URLClassLoader;
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import javax.print.DocFlavor;
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import javax.print.PrintServiceLookup;
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/**
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* @test
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* @bug 8273831
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* @summary Tests custom class loader cleanup
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* @library /javax/swing/regtesthelpers
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* @build Util
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* @run main/timeout=60/othervm -Xmx32m FlushCustomClassLoader
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*/
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public final class FlushCustomClassLoader {
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public static void main(String[] args) throws Exception {
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Reference<ClassLoader> loader = getLoader("testMethod");
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int attempt = 0;
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while (loader.get() != null) {
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Util.generateOOME();
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System.out.println("Not freed, attempt: " + attempt++);
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}
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}
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public static void testMethod() {
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DocFlavor flavor = DocFlavor.SERVICE_FORMATTED.PRINTABLE;
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PrintServiceLookup.lookupPrintServices(flavor, null);
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}
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private static Reference<ClassLoader> getLoader(String m) throws Exception {
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/*
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* The print services are stored per the AppContext, and each AppContext
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* caches the "current" class loader during creation.
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* see javax.print.PrintServiceLookup.
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*
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* To prevent AppContext from cache our test loader we force AppContext
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* creation early by the invokeAndWait.
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* The "EventQueue.invokeAndWait(() -> {});" can be removed when the
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* AppContext usage will be deleted in the PrintServiceLookup
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*/
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EventQueue.invokeAndWait(() -> {});
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URL url = FlushCustomClassLoader.class.getProtectionDomain()
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.getCodeSource().getLocation();
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URLClassLoader loader = new URLClassLoader(new URL[]{url}, null);
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Thread ct = Thread.currentThread();
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ct.setContextClassLoader(loader);
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Class<?> cls = Class.forName("FlushCustomClassLoader", true, loader);
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cls.getDeclaredMethod(m).invoke(null);
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ct.setContextClassLoader(null);
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loader.close();
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return new WeakReference<>(loader);
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}
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}
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