| /* |
| * Copyright (c) 2018, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| |
| package jdk.jfr.event.io; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.OutputStream; |
| import java.io.RandomAccessFile; |
| import java.lang.instrument.ClassFileTransformer; |
| import java.lang.instrument.Instrumentation; |
| import java.net.ServerSocket; |
| import java.net.Socket; |
| import java.security.ProtectionDomain; |
| import java.util.concurrent.CountDownLatch; |
| |
| |
| /** |
| * @test |
| * @key jfr |
| * @summary This test runs JFR with a javaagent that reads/writes files and |
| * sockets during every class definition. This is to verify that the i/o |
| * instrumentation in JFR does not interfere with javaagents. |
| * |
| * @library /test/lib /test/jdk |
| * @modules java.instrument |
| * |
| * @run shell MakeJAR.sh EvilInstrument 'Can-Redefine-Classes: true' |
| * @run main/othervm -javaagent:EvilInstrument.jar jdk.jfr.event.io.EvilInstrument |
| */ |
| |
| public class EvilInstrument { |
| |
| CountDownLatch socketEchoReady = new CountDownLatch(1); |
| ServerSocket ss; |
| |
| /** |
| * Thread that echos everything from a socket. |
| */ |
| class SocketEcho extends Thread |
| { |
| public SocketEcho() { |
| setDaemon(true); |
| } |
| |
| public void run() { |
| try { |
| Socket s = ss.accept(); |
| OutputStream os = s.getOutputStream(); |
| InputStream is = s.getInputStream(); |
| socketEchoReady.countDown(); |
| for(;;) { |
| int b = is.read(); |
| os.write(b); |
| } |
| } catch(Exception ex) { |
| ex.printStackTrace(); |
| System.exit(1); |
| } |
| } |
| } |
| |
| public static File createScratchFile() throws IOException { |
| return File.createTempFile("EvilTransformer", null, new File(".")).getAbsoluteFile(); |
| } |
| |
| class EvilTransformer implements ClassFileTransformer { |
| File scratch; |
| Socket s; |
| volatile boolean inited = false; |
| |
| public EvilTransformer() throws Exception { |
| scratch = createScratchFile(); |
| ss = new ServerSocket(0); |
| new SocketEcho().start(); |
| s = new Socket(ss.getInetAddress(), ss.getLocalPort()); |
| socketEchoReady.await(); |
| inited = true; |
| } |
| |
| public byte[] transform(ClassLoader loader, String className, |
| Class<?> classBeingRedefined, |
| ProtectionDomain protectionDomain, |
| byte[] classfileBuffer) |
| { |
| if (!inited) { |
| return null; |
| } |
| // Do i/o operations during every transform call. |
| try { |
| FileOutputStream fos = new FileOutputStream(scratch); |
| fos.write(31); |
| fos.close(); |
| |
| FileInputStream fis = new FileInputStream(scratch); |
| fis.read(); |
| fis.close(); |
| |
| RandomAccessFile raf = new RandomAccessFile(scratch, "rw"); |
| raf.read(); |
| raf.write(31); |
| raf.close(); |
| |
| s.getOutputStream().write(31); |
| s.getInputStream().read(); |
| |
| } catch(Exception ex) { |
| ex.printStackTrace(); |
| System.exit(1); |
| } |
| return null; |
| } |
| } |
| |
| public static void premain(String agentArgs, Instrumentation inst) { |
| new EvilInstrument().addTransformer(inst); |
| } |
| |
| private void addTransformer(Instrumentation inst) { |
| try { |
| inst.addTransformer(new EvilTransformer()); |
| } catch(Exception ex) { |
| ex.printStackTrace(); |
| System.exit(1); |
| } |
| } |
| |
| public static void main(String... args) throws Exception { |
| System.out.println("Hello"); |
| } |
| |
| } |