3789983e89
Reviewed-by: darcy, ihse
82 lines
3.0 KiB
Java
82 lines
3.0 KiB
Java
/*
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* Copyright (c) 2016, 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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import java.io.DataInputStream;
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import java.io.InputStream;
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import java.io.IOException;
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import java.io.PrintStream;
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import java.util.jar.JarFile;
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import java.util.zip.ZipEntry;
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public class CustomLoader extends ClassLoader {
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private static PrintStream out = System.out;
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public static ClassLoader myself;
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public static ClassLoader agentClassLoader;
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public static boolean failed = true;
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public CustomLoader(ClassLoader classLoader) {
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super(classLoader);
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myself = this;
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}
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@Override
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public Class<?> loadClass(String name) throws ClassNotFoundException {
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out.println("CustomLoader: loading class: " + name);
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if (name.equals("Agent")) {
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Class c = null;
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try {
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byte[] buf = locateBytes();
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c = defineClass(name, buf, 0, buf.length);
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} catch (IOException ex) {
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throw new ClassNotFoundException(ex.getMessage());
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}
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resolveClass(c);
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out.println("CustomLoader.loadClass after resolveClass: " + name +
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"; Class: " + c + "; ClassLoader: " + c.getClassLoader());
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return c;
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}
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return super.loadClass(name);
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}
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private byte[] locateBytes() throws IOException {
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try {
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JarFile jar = new JarFile("Agent.jar");
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InputStream is = jar.getInputStream(jar.getEntry("Agent.class"));
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int len = is.available();
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byte[] buf = new byte[len];
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DataInputStream in = new DataInputStream(is);
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in.readFully(buf);
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return buf;
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} catch (IOException ioe) {
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ioe.printStackTrace();
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throw new IOException("Test failed due to IOException!");
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}
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}
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void appendToClassPathForInstrumentation(String path) {
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out.println("CustomLoader.appendToClassPathForInstrumentation: " +
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this + ", jar: " + path);
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failed = false;
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}
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}
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