[jira] Updated: (SANDBOX-260) ASM bytecode transformation let verification from JVM fail for some method (-signatures)

["Claas Altschaffel (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SANDBOX-260?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Claas Altschaffel updated SANDBOX-260:
--------------------------------------

    Attachment: ASMRewriteBugsTestCase.patch

The provided patch adds three classes to the "test" tree of javaflow. 

A TestCase / AbstractTestcase combination and a class to rewrite which contains a method that is not transformed correct by the asm transformer.

The method is copied from the "Jadex" agent project where we tried to use javaflow. There are also some other mehtods that are not transformed correct. I will try to add these methods to the TestCase later.


> ASM bytecode transformation let verification from JVM fail for some method (-signatures)
> ----------------------------------------------------------------------------------------
>
>                 Key: SANDBOX-260
>                 URL: https://issues.apache.org/jira/browse/SANDBOX-260
>             Project: Commons Sandbox
>          Issue Type: Bug
>          Components: Javaflow
>         Environment: Sun JDK 1.5 / 1.6, 
> 64bit / 32bit emul.
> asm 2.2.3
>            Reporter: Claas Altschaffel
>         Attachments: ASMRewriteBugsTestCase.patch
>
>
> I think there is a bug in the asm bytecode transformer (considered as "experimental"?).
> The transformer transforms some methods into bytecode which seems to be not valid. The ASM CheckClassAdapter and the JVM-Verifier fails to check the transformed class with a VerifyError.
> I will provide a TestCase to show this problem.

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