| /* |
| * Copyright (c) 2003, 2011, 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. |
| */ |
| |
| /* |
| * @test |
| * @bug 4894899 7054428 |
| * @summary Test various cases of passing java.nio.ByteBuffers |
| * to defineClass(). |
| * |
| * @build DefineClassByteBuffer TestClass |
| * @run main DefineClassByteBuffer |
| */ |
| |
| import java.security.*; |
| import java.nio.*; |
| import java.nio.channels.*; |
| import java.io.*; |
| |
| public class DefineClassByteBuffer { |
| |
| static void test(ClassLoader cl) throws Exception { |
| Class c = Class.forName("TestClass", true, cl); |
| if (!"TestClass".equals(c.getName())) { |
| throw new RuntimeException("Got wrong class: " + c); |
| } |
| } |
| |
| public static void main(String arg[]) throws Exception { |
| |
| // Rename the compiled TestClass.class file to something else, |
| // otherwise it would be loaded by the parent class loader and |
| // DummyClassLoader will never be used, especially in /othervm mode. |
| |
| File oldFile = new File(System.getProperty("test.classes", "."), |
| "TestClass.class"); |
| File newFile = new File(System.getProperty("test.classes", "."), |
| "CLAZZ"); |
| oldFile.renameTo(newFile); |
| |
| ClassLoader[] cls = new ClassLoader[DummyClassLoader.MAX_TYPE]; |
| for (int i = 0; i < cls.length; i++) { |
| cls[i] = new DummyClassLoader(i); |
| } |
| |
| /* Create several instances of the class using different classloaders, |
| which are using different types of ByteBuffer. */ |
| for (int i = 0; i < cls.length; i++) { |
| test(cls[i]); |
| } |
| |
| if (DummyClassLoader.count != cls.length) { |
| throw new Exception("DummyClassLoader not always used"); |
| } |
| } |
| |
| /** Always loads the same class, using various types of ByteBuffers */ |
| public static class DummyClassLoader extends SecureClassLoader { |
| |
| public static final String CLASS_NAME = "TestClass"; |
| |
| public static final int MAPPED_BUFFER = 0; |
| public static final int DIRECT_BUFFER = 1; |
| public static final int ARRAY_BUFFER = 2; |
| public static final int WRAPPED_BUFFER = 3; |
| public static final int READ_ONLY_ARRAY_BUFFER = 4; |
| public static final int READ_ONLY_DIRECT_BUFFER = 5; |
| public static final int DUP_ARRAY_BUFFER = 6; |
| public static final int DUP_DIRECT_BUFFER = 7; |
| public static final int MAX_TYPE = 7; |
| |
| int loaderType; |
| |
| static int count = 0; |
| |
| DummyClassLoader(int loaderType) { |
| this.loaderType = loaderType; |
| } |
| |
| static ByteBuffer[] buffers = new ByteBuffer[MAX_TYPE + 1]; |
| |
| static ByteBuffer readClassFile(String name) { |
| try { |
| File f = new File(System.getProperty("test.classes", "."), |
| "CLAZZ"); |
| try (FileInputStream fin = new FileInputStream(f); |
| FileChannel fc = fin.getChannel()) { |
| return fc.map(FileChannel.MapMode.READ_ONLY, 0, fc.size()); |
| } |
| } catch (FileNotFoundException e) { |
| throw new RuntimeException("Can't open file: " + name, e); |
| } catch (IOException e) { |
| throw new RuntimeException("Can't open file: " + name, e); |
| } |
| } |
| |
| static { |
| /* create a bunch of different ByteBuffers, starting with a mapped |
| buffer from a class file, and create various duplicate and wrapped |
| buffers. */ |
| buffers[MAPPED_BUFFER] = readClassFile(CLASS_NAME + ".class"); |
| byte[] array = new byte[buffers[MAPPED_BUFFER].limit()]; |
| buffers[MAPPED_BUFFER].get(array); |
| buffers[MAPPED_BUFFER].flip(); |
| |
| buffers[DIRECT_BUFFER] = ByteBuffer.allocateDirect(array.length); |
| buffers[DIRECT_BUFFER].put(array); |
| buffers[DIRECT_BUFFER].flip(); |
| |
| buffers[ARRAY_BUFFER] = ByteBuffer.allocate(array.length); |
| buffers[ARRAY_BUFFER].put(array); |
| buffers[ARRAY_BUFFER].flip(); |
| |
| buffers[WRAPPED_BUFFER] = ByteBuffer.wrap(array); |
| |
| buffers[READ_ONLY_ARRAY_BUFFER] = buffers[ARRAY_BUFFER].asReadOnlyBuffer(); |
| |
| buffers[READ_ONLY_DIRECT_BUFFER] = buffers[DIRECT_BUFFER].asReadOnlyBuffer(); |
| |
| buffers[DUP_ARRAY_BUFFER] = buffers[ARRAY_BUFFER].duplicate(); |
| |
| buffers[DUP_DIRECT_BUFFER] = buffers[DIRECT_BUFFER].duplicate(); |
| } |
| |
| public Class findClass(String name) { |
| CodeSource cs = null; |
| count++; |
| return defineClass(name, buffers[loaderType], cs); |
| } |
| } /* DummyClassLoader */ |
| |
| } /* DefineClassByteBuffer */ |