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/*
* Copyright (c) 2005, 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.
*/
/*
*
*
* Unit test for Instrumentation appendToBootstrapClassLoaderSearch method.
* The test works as follows:
*
* 1. Load class "Application" and execute the doSomething() method
*
* 2. Append Tracer.jar to the boot class path - Tracer.jar has a single
* class org.tools.Tracer.
*
* 3. Redefine class "Application" - the redefined version has an instrumented
* version of doSomething() that invokes a method in org.tools.Tracer.
*
* 4. Re-execute doSomething() - this should provoke the loading of org.tools.Tracer
* from the jar file. If updated version of doSomething() executes then test
* passes.
*/
import java.lang.instrument.*;
import java.util.jar.JarFile;
import java.io.*;
public class DynamicTest {
public static void main(String args[]) throws Exception {
// Load Application
Application app = new Application();
if (app.doSomething() != 1) {
throw new RuntimeException("Test configuration error - doSomething should return 1");
}
// Add org.tools.Tracer package to the boot class path
JarFile jf = new JarFile("Tracer.jar");
Agent.getInstrumentation().appendToBootstrapClassLoaderSearch(jf);
// Redefine Application with the instrumented version
File f = new File("InstrumentedApplication.bytes");
int len = (int)f.length();
byte[] def = new byte[len];
FileInputStream fis = new FileInputStream(f);
int nread = 0;
do {
int n = fis.read(def, nread, len-nread);
if (n > 0) {
nread += n;
}
} while (nread < len);
ClassDefinition classDefs = new ClassDefinition(Application.class, def);
Agent.getInstrumentation().redefineClasses(new ClassDefinition[] { classDefs } );
// Re-execute doSomething() - should get 3 messages printed
int res = app.doSomething();
if (res != 3) {
throw new RuntimeException("FAIL: redefined Application returned: " + res);
}
System.out.println("PASS: Test passed.");
}
}
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