ClassUnloadTest.java revision 2362
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 * 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 * 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 * 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. 2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2362N/A * or visit www.oracle.com if you need additional information or have any 0N/A * Unit test for Instrumentation appendToSystemClassLoaderSearch. This 0N/A * test does the following: 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 * 2. Add Bar.jar to the system class path. Bar.jar contains Bar. 0N/A * 3. Create another class loader to load Foo. Execute Foo.doSomething. 0N/A * doSomething will load Bar. 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 * 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 // This should fail as Bar is not available 0N/A // put Bar on the system class path 0N/A // This should fail even though Bar is now available 0N/A // This should succeed because this is a different Foo 0N/A // Exercise some class unloading