J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| 13 | * accompanied this code). |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License version |
| 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 18 | * |
| 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 21 | * have any questions. |
| 22 | */ |
| 23 | |
| 24 | /* |
| 25 | * |
| 26 | * |
| 27 | * Unit test for Instrumentation appendToBootstrapClassLoaderSearch method. |
| 28 | * The test works as follows: |
| 29 | * |
| 30 | * 1. Load class "Application" and execute the doSomething() method |
| 31 | * |
| 32 | * 2. Append Tracer.jar to the boot class path - Tracer.jar has a single |
| 33 | * class org.tools.Tracer. |
| 34 | * |
| 35 | * 3. Redefine class "Application" - the redefined version has an instrumented |
| 36 | * version of doSomething() that invokes a method in org.tools.Tracer. |
| 37 | * |
| 38 | * 4. Re-execute doSomething() - this should provoke the loading of org.tools.Tracer |
| 39 | * from the jar file. If updated version of doSomething() executes then test |
| 40 | * passes. |
| 41 | */ |
| 42 | import java.lang.instrument.*; |
| 43 | import java.util.jar.JarFile; |
| 44 | import java.io.*; |
| 45 | |
| 46 | public class DynamicTest { |
| 47 | |
| 48 | public static void main(String args[]) throws Exception { |
| 49 | |
| 50 | // Load Application |
| 51 | Application app = new Application(); |
| 52 | if (app.doSomething() != 1) { |
| 53 | throw new RuntimeException("Test configuration error - doSomething should return 1"); |
| 54 | } |
| 55 | |
| 56 | // Add org.tools.Tracer package to the boot class path |
| 57 | JarFile jf = new JarFile("Tracer.jar"); |
| 58 | Agent.getInstrumentation().appendToBootstrapClassLoaderSearch(jf); |
| 59 | |
| 60 | // Redefine Application with the instrumented version |
| 61 | File f = new File("InstrumentedApplication.bytes"); |
| 62 | int len = (int)f.length(); |
| 63 | byte[] def = new byte[len]; |
| 64 | |
| 65 | FileInputStream fis = new FileInputStream(f); |
| 66 | int nread = 0; |
| 67 | do { |
| 68 | int n = fis.read(def, nread, len-nread); |
| 69 | if (n > 0) { |
| 70 | nread += n; |
| 71 | } |
| 72 | } while (nread < len); |
| 73 | |
| 74 | ClassDefinition classDefs = new ClassDefinition(Application.class, def); |
| 75 | Agent.getInstrumentation().redefineClasses(new ClassDefinition[] { classDefs } ); |
| 76 | |
| 77 | // Re-execute doSomething() - should get 3 messages printed |
| 78 | int res = app.doSomething(); |
| 79 | if (res != 3) { |
| 80 | throw new RuntimeException("FAIL: redefined Application returned: " + res); |
| 81 | } |
| 82 | System.out.println("PASS: Test passed."); |
| 83 | } |
| 84 | } |