Mercurial > jdk8-mips64-public > hotspot / annotate
test/runtime/RedefineObject/Agent.java@bb416ee2a79b (annotated)
test/runtime/RedefineObject/Agent.java
Thu, 18 Jul 2013 03:38:10 -0700
- author
- cl
- date
- Thu, 18 Jul 2013 03:38:10 -0700
- changeset 5396
- bb416ee2a79b
- parent 5100
- 43083e670adf
- child 5508
- 85147f28faba
- permissions
- -rw-r--r--
Added tag jdk8-b99 for changeset 81b6cb70717c
| coleenp@5100 | 1 | /* |
| coleenp@5100 | 2 | * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
| coleenp@5100 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| coleenp@5100 | 4 | * |
| coleenp@5100 | 5 | * This code is free software; you can redistribute it and/or modify it |
| coleenp@5100 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| coleenp@5100 | 7 | * published by the Free Software Foundation. |
| coleenp@5100 | 8 | * |
| coleenp@5100 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| coleenp@5100 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| coleenp@5100 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| coleenp@5100 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| coleenp@5100 | 13 | * accompanied this code). |
| coleenp@5100 | 14 | * |
| coleenp@5100 | 15 | * You should have received a copy of the GNU General Public License version |
| coleenp@5100 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| coleenp@5100 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| coleenp@5100 | 18 | * |
| coleenp@5100 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| coleenp@5100 | 20 | * or visit www.oracle.com if you need additional information or have any |
| coleenp@5100 | 21 | * questions. |
| coleenp@5100 | 22 | */ |
| coleenp@5100 | 23 | import java.security.*; |
| coleenp@5100 | 24 | import java.lang.instrument.*; |
| coleenp@5100 | 25 | |
| coleenp@5100 | 26 | public class Agent implements ClassFileTransformer { |
| coleenp@5100 | 27 | public synchronized byte[] transform(final ClassLoader classLoader, |
| coleenp@5100 | 28 | final String className, |
| coleenp@5100 | 29 | Class<?> classBeingRedefined, |
| coleenp@5100 | 30 | ProtectionDomain protectionDomain, |
| coleenp@5100 | 31 | byte[] classfileBuffer) { |
| coleenp@5100 | 32 | //System.out.println("Transforming class " + className); |
| coleenp@5100 | 33 | return classfileBuffer; |
| coleenp@5100 | 34 | } |
| coleenp@5100 | 35 | |
| coleenp@5100 | 36 | public static void premain(String agentArgs, Instrumentation instrumentation) { |
| coleenp@5100 | 37 | |
| coleenp@5100 | 38 | Agent transformer = new Agent(); |
| coleenp@5100 | 39 | |
| coleenp@5100 | 40 | instrumentation.addTransformer(transformer, true); |
| coleenp@5100 | 41 | |
| coleenp@5100 | 42 | Class c = Object.class; |
| coleenp@5100 | 43 | try { |
| coleenp@5100 | 44 | instrumentation.retransformClasses(c); |
| coleenp@5100 | 45 | } catch (Exception e) { |
| coleenp@5100 | 46 | e.printStackTrace(); |
| coleenp@5100 | 47 | } |
| coleenp@5100 | 48 | |
| coleenp@5100 | 49 | instrumentation.removeTransformer(transformer); |
| coleenp@5100 | 50 | } |
| coleenp@5100 | 51 | |
| coleenp@5100 | 52 | public static void main(String[] args) { |
| coleenp@5100 | 53 | byte[] ba = new byte[0]; |
| coleenp@5100 | 54 | |
| coleenp@5100 | 55 | // If it survives 1000 GC's, it's good. |
| coleenp@5100 | 56 | for (int i = 0; i < 1000 ; i++) { |
| coleenp@5100 | 57 | System.gc(); |
| coleenp@5100 | 58 | ba.clone(); |
| coleenp@5100 | 59 | } |
| coleenp@5100 | 60 | } |
| coleenp@5100 | 61 | } |
