[Jboss-dev-forums] [Design of AOP on JBoss (Aspects/JBoss)] - Re: Retain ProtectionDomain for instrumented classes

[twundke <nu...@jb...>]

Sorry I wasn't clearer in my original post. It's been a while since I looked at this issue.

My particular problem is that the generated field wrapper inner classes don't get assigned the correct protection domain. Here's a stack trace that shows the problem occuring.


  | 	  getDefaultDomain():1583, ClassLoader.java
  | 	  preDefineClass():483, ClassLoader.java
  | 	  defineClass():614, ClassLoader.java
  | 	  defineClass():465, ClassLoader.java
  | 	  invoke0():-1, NativeMethodAccessorImpl.java
  | 	  invoke():39, NativeMethodAccessorImpl.java
  | 	  invoke():25, DelegatingMethodAccessorImpl.java
  | 	  invoke():585, Method.java
  | 	  toClass():52, StandaloneClassPool.java
  | 	  toClass():962, CtClass.java
  | 	  compileOrLoadClass():119, TransformerCommon.java
  | 	  createOptimizedInvocationClass():572, FieldAccessTransformer.java
  | 	  buildOptimizedReadWrapper():358, FieldAccessTransformer.java
  | 	  buildOptimizedWrappers():342, FieldAccessTransformer.java
  | 	  buildFieldWrappers():232, FieldAccessTransformer.java
  | 	  buildFieldWrappers():65, FieldAccessTransformer.java
  | 	  transform():592, Instrumentor.java
  | 	  translate():572, AspectManager.java
  | 	  transform():490, AspectManager.java
  | 	  aspectTransform():100, AopAgent.java
  | 	  transform():141, AopAgent.java
  | 	  transform():122, TransformerManager.java
  | 	  transform():155, InstrumentationImpl.java
  | 	  defineClass1():-1, ClassLoader.java
  | 	  defineClass():620, ClassLoader.java
  | 	  defineClass():320, BaseURLClassLoader.java
  | 	  access$000():38, BaseURLClassLoader.java
  | 	  run():108, BaseURLClassLoader.java
  | 	  run():98, BaseURLClassLoader.java
  | 	  doPrivileged():-1, AccessController.java
  | 	  findClass():96, BaseURLClassLoader.java
  | 	  findClassInternal():168, BaseClassLoader.java
  | 	  findClassInternal():146, BaseClassLoader.java
  | 	  findClassInternal():49, FrameworkClassLoader.java
  | 	  loadClass():280, BaseClassLoader.java
  | 	  loadClass():251, ClassLoader.java
  | 	  loadClassInternal():319, ClassLoader.java
  | 	  initialiseDomains():117, DomainManagerImpl.java
  | 	  <init>():78, DomainManagerImpl.java
  | 	  start():153, FrameworkController.java
  | 	  invoke0():-1, NativeMethodAccessorImpl.java
  | 	  invoke():39, NativeMethodAccessorImpl.java
  | 	  invoke():25, DelegatingMethodAccessorImpl.java
  | 	  invoke():585, Method.java
  | 	  initialiseFramework():366, FrameworkLoader.java
  | 	  main():463, FrameworkLoader.java
  | 

The toClass method of StandaloneClassPool does the following:

  |          Class cl = Class.forName("java.lang.ClassLoader");
  |          java.lang.reflect.Method method
  |                  = cl.getDeclaredMethod("defineClass",
  |                          new Class[]{String.class, byte[].class,
  |                                      int.class, int.class});
  | 

My classloader doesn't get a chance to define the class, causing the field wrappers to be assigned a default protection domain.

So, what's actually needed is for the class pool to use the correct classloader when calling defineClass.

Hope that helps.

Tim.

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