0N/A/*
2362N/A * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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0N/A */
0N/A
0N/A/*
0N/A *
0N/A *
0N/A * Unit test for Instrumentation appendToSystemClassLoaderSearch. This
0N/A * test does the following:
0N/A *
0N/A * 1. Creates a class loader to load class Foo. Execute Foo.doSomething
0N/A * which references a missing class Bar. The doSomething method
0N/A * should fail with NoClassDefFoundError.
0N/A *
0N/A * 2. Add Bar.jar to the system class path. Bar.jar contains Bar.
0N/A *
0N/A * 3. Create another class loader to load Foo. Execute Foo.doSomething.
0N/A * doSomething will load Bar.
0N/A *
0N/A * 4. Re-execute the first Foo's doSomething - it should fail a second
0N/A * time because the attempt to resolve Bar must fail with the same
0N/A * error as the first attempt.
0N/A *
0N/A * 5. De-reference both class loaders and execute System.gc(). We can't
0N/A * assert that the Foo classes will be unloaded but it serves to
0N/A * exercise the unload code path in HotSpot.
0N/A */
0N/Aimport java.lang.instrument.Instrumentation;
0N/Aimport java.io.File;
0N/Aimport java.net.URL;
0N/Aimport java.net.URLClassLoader;
0N/Aimport java.lang.reflect.Method;
0N/Aimport java.lang.reflect.InvocationTargetException;
0N/Aimport java.util.jar.JarFile;
0N/A
0N/Apublic class ClassUnloadTest {
0N/A
0N/A static Instrumentation ins;
0N/A
0N/A public static void main(String args[]) throws Exception {
0N/A String dir = args[0] + File.separator;
0N/A String jar = dir + args[1];
0N/A
0N/A System.out.println(jar);
0N/A
0N/A URL u = (new File(dir)).toURL();
0N/A URL urls[] = { u };
0N/A
0N/A // This should fail as Bar is not available
0N/A Invoker i1 = new Invoker(urls, "Foo", "doSomething");
0N/A Boolean result = (Boolean)i1.invoke((Object)null);
0N/A if (result.booleanValue()) {
0N/A throw new RuntimeException("Test configuration error - doSomething should not succeed");
0N/A }
0N/A
0N/A // put Bar on the system class path
0N/A ins.appendToSystemClassLoaderSearch( new JarFile(jar) );
0N/A
0N/A // This should fail even though Bar is now available
0N/A result = (Boolean)i1.invoke((Object)null);
0N/A if (result.booleanValue()) {
0N/A throw new RuntimeException("Test configuration error - doSomething should not succeed");
0N/A }
0N/A
0N/A // This should succeed because this is a different Foo
0N/A Invoker i2 = new Invoker(urls, "Foo", "doSomething");
0N/A result = (Boolean)i2.invoke((Object)null);
0N/A if (!result.booleanValue()) {
0N/A throw new RuntimeException("Test configuration error - doSomething did not succeed");
0N/A }
0N/A
0N/A // Exercise some class unloading
0N/A i1 = i2 = null;
0N/A System.gc();
0N/A }
0N/A
0N/A static class Invoker {
0N/A
0N/A URLClassLoader cl;
0N/A Method m;
0N/A
0N/A public Invoker(URL urls[], String cn, String mn, Class ... params)
0N/A throws ClassNotFoundException, NoSuchMethodException
0N/A {
0N/A cl = new URLClassLoader(urls);
0N/A Class c = Class.forName("Foo", true, cl);
0N/A m = c.getDeclaredMethod(mn, params);
0N/A }
0N/A
0N/A public Object invoke(Object ... args)
0N/A throws IllegalAccessException, InvocationTargetException
0N/A {
0N/A return m.invoke(args);
0N/A }
0N/A }
0N/A
0N/A public static void premain(String args, Instrumentation i) {
0N/A ins = i;
0N/A }
0N/A}