jdk8-mips64-public/hotspot: test/runtime/RedefineObject/Agent.java@2bac854670c0 (annotated)

test/runtime/RedefineObject/Agent.java@2bac854670c0 (annotated)

test/runtime/RedefineObject/Agent.java

Wed, 22 Jan 2014 12:37:28 -0800

author: katleman
date: Wed, 22 Jan 2014 12:37:28 -0800
changeset 6575: 2bac854670c0
parent 6198: 55fb97c4c58d
child 6876: 710a3c8b516e
permissions: -rw-r--r--

Added tag jdk8u5-b05 for changeset b90de55aca30

 /*
  * Copyright (c) 2013, 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.
  */
 import java.security.*;
 import java.lang.instrument.*;
 import java.lang.reflect.*;
 public class Agent implements ClassFileTransformer {
     public synchronized byte[] transform(final ClassLoader classLoader,
                                          final String className,
                                          Class<?> classBeingRedefined,
                                          ProtectionDomain protectionDomain,
                                          byte[] classfileBuffer) {
         System.out.println("Transforming class " + className);
         return classfileBuffer;
     }
     public static void redefine(String agentArgs, Instrumentation instrumentation, Class to_redefine) {
         try {
             instrumentation.retransformClasses(to_redefine);
         } catch (Exception e) {
             e.printStackTrace();
         }
     }
     public static void premain(String agentArgs, Instrumentation instrumentation) {
         Agent transformer = new Agent();
         instrumentation.addTransformer(transformer, true);
         // Redefine java/lang/Object and java/lang/reflect/Method.invoke and
         // java/lang/ClassLoader
         Class object_class = Object.class;
         redefine(agentArgs, instrumentation, object_class);
         Class method_class = Method.class;
         redefine(agentArgs, instrumentation, method_class);
         Class loader_class = ClassLoader.class;
         redefine(agentArgs, instrumentation, loader_class);
         instrumentation.removeTransformer(transformer);
     }
     public static void main(String[] args) {
         byte[] ba = new byte[0];
         // If it survives 1000 GC's, it's good.
         for (int i = 0; i < 1000 ; i++) {
             System.gc();
             ba.clone();
         }
         try {
             // Use java/lang/reflect/Method.invoke to call
             WalkThroughInvoke a = new WalkThroughInvoke();
             Class aclass = WalkThroughInvoke.class;
             Method m = aclass.getMethod("stackWalk");
             m.invoke(a);
         } catch (Exception x) {
             x.printStackTrace();
         }
     }
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

test/runtime/RedefineObject/Agent.java@2bac854670c0 (annotated)

test/runtime/RedefineObject/Agent.java