85 lines
3.1 KiB
Java
85 lines
3.1 KiB
Java
/*
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* Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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*
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*
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* Unit test for Instrumentation appendToBootstrapClassLoaderSearch method.
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* The test works as follows:
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*
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* 1. Load class "Application" and execute the doSomething() method
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*
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* 2. Append Tracer.jar to the boot class path - Tracer.jar has a single
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* class org.tools.Tracer.
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*
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* 3. Redefine class "Application" - the redefined version has an instrumented
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* version of doSomething() that invokes a method in org.tools.Tracer.
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*
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* 4. Re-execute doSomething() - this should provoke the loading of org.tools.Tracer
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* from the jar file. If updated version of doSomething() executes then test
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* passes.
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*/
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import java.lang.instrument.*;
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import java.util.jar.JarFile;
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import java.io.*;
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public class DynamicTest {
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public static void main(String args[]) throws Exception {
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// Load Application
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Application app = new Application();
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if (app.doSomething() != 1) {
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throw new RuntimeException("Test configuration error - doSomething should return 1");
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}
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// Add org.tools.Tracer package to the boot class path
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JarFile jf = new JarFile("Tracer.jar");
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Agent.getInstrumentation().appendToBootstrapClassLoaderSearch(jf);
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// Redefine Application with the instrumented version
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File f = new File("InstrumentedApplication.bytes");
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int len = (int)f.length();
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byte[] def = new byte[len];
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FileInputStream fis = new FileInputStream(f);
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int nread = 0;
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do {
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int n = fis.read(def, nread, len-nread);
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if (n > 0) {
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nread += n;
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}
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} while (nread < len);
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ClassDefinition classDefs = new ClassDefinition(Application.class, def);
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Agent.getInstrumentation().redefineClasses(new ClassDefinition[] { classDefs } );
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// Re-execute doSomething() - should get 3 messages printed
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int res = app.doSomething();
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if (res != 3) {
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throw new RuntimeException("FAIL: redefined Application returned: " + res);
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}
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System.out.println("PASS: Test passed.");
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}
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}
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