| /* |
| * Copyright (c) 2004, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 5040740 |
| * @summary annotations cause memory leak |
| * @author gafter |
| * |
| * @run shell LoaderLeak.sh |
| */ |
| |
| import java.net.*; |
| import java.lang.ref.*; |
| import java.util.*; |
| import java.io.*; |
| |
| public class Main { |
| public static void main(String[] args) throws Exception { |
| for (int i=0; i<100; i++) |
| doTest(args.length != 0); |
| } |
| |
| static void doTest(boolean readAnn) throws Exception { |
| // URL classes = new URL("file://" + System.getProperty("user.dir") + "/classes"); |
| // URL[] path = { classes }; |
| // URLClassLoader loader = new URLClassLoader(path); |
| ClassLoader loader = new SimpleClassLoader(); |
| WeakReference<Class<?>> c = new WeakReference(loader.loadClass("C")); |
| if (c.get() == null) throw new AssertionError(); |
| if (c.get().getClassLoader() != loader) throw new AssertionError(); |
| if (readAnn) System.out.println(c.get().getAnnotations()[0]); |
| if (c.get() == null) throw new AssertionError(); |
| System.gc(); |
| System.gc(); |
| if (c.get() == null) throw new AssertionError(); |
| System.gc(); |
| System.gc(); |
| loader = null; |
| |
| // Might require multiple calls to System.gc() for weak-references |
| // processing to be complete. If the weak-reference is not cleared as |
| // expected we will hang here until timed out by the test harness. |
| while (true) { |
| System.gc(); |
| Thread.sleep(20); |
| if (c.get() == null) { |
| break; |
| } |
| } |
| } |
| } |
| |
| class SimpleClassLoader extends ClassLoader { |
| private Hashtable classes = new Hashtable(); |
| |
| public SimpleClassLoader() { |
| } |
| private byte getClassImplFromDataBase(String className)[] { |
| byte result[]; |
| try { |
| FileInputStream fi = new FileInputStream("classes/"+className+".class"); |
| result = new byte[fi.available()]; |
| fi.read(result); |
| return result; |
| } catch (Exception e) { |
| |
| /* |
| * If we caught an exception, either the class wasnt found or it |
| * was unreadable by our process. |
| */ |
| return null; |
| } |
| } |
| public Class loadClass(String className) throws ClassNotFoundException { |
| return (loadClass(className, true)); |
| } |
| public synchronized Class loadClass(String className, boolean resolveIt) |
| throws ClassNotFoundException { |
| Class result; |
| byte classData[]; |
| |
| /* Check our local cache of classes */ |
| result = (Class)classes.get(className); |
| if (result != null) { |
| return result; |
| } |
| |
| /* Check with the primordial class loader */ |
| try { |
| result = super.findSystemClass(className); |
| return result; |
| } catch (ClassNotFoundException e) { |
| } |
| |
| /* Try to load it from our repository */ |
| classData = getClassImplFromDataBase(className); |
| if (classData == null) { |
| throw new ClassNotFoundException(); |
| } |
| |
| /* Define it (parse the class file) */ |
| result = defineClass(classData, 0, classData.length); |
| if (result == null) { |
| throw new ClassFormatError(); |
| } |
| |
| if (resolveIt) { |
| resolveClass(result); |
| } |
| |
| classes.put(className, result); |
| return result; |
| } |
| } |