Mercurial > hg > truffle
diff test/runtime/RedefineObject/Agent.java @ 12022:85147f28faba
8009728: nsk/jvmti/AttachOnDemand/attach030 crashes on Win32
Summary: ActiveMethodOopsCache was used to keep track of old versions of some methods that are cached in Universe but is buggy with permgen removal and not needed anymore
Reviewed-by: sspitsyn, dcubed, mseledtsov
author | coleenp |
---|---|
date | Mon, 12 Aug 2013 17:24:54 -0400 |
parents | 43083e670adf |
children | de6a9e811145 |
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--- a/test/runtime/RedefineObject/Agent.java Sat Aug 10 10:56:27 2013 -0700 +++ b/test/runtime/RedefineObject/Agent.java Mon Aug 12 17:24:54 2013 -0400 @@ -1,5 +1,5 @@ /* - * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2013, 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 @@ -22,6 +22,7 @@ */ import java.security.*; import java.lang.instrument.*; +import java.lang.reflect.*; public class Agent implements ClassFileTransformer { public synchronized byte[] transform(final ClassLoader classLoader, @@ -29,22 +30,34 @@ Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) { - //System.out.println("Transforming class " + className); + 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); - Class c = Object.class; - try { - instrumentation.retransformClasses(c); - } catch (Exception e) { - e.printStackTrace(); - } + // 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); } @@ -57,5 +70,14 @@ 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(); + } } }