Re: instrumentation on anonymous class.

Zhongxian -:

Be aware of the type: double and long, these types are 2-sized on stack.

You may have a look at the code  below and get a rough idea (I did not clean
it up, it is still a bit messy):

http://code.google.com/p/tpalus/source/browse/trunk/%20tpalus%20--username%20racezhang/Palus/src/palus/instrument/ObjectStateMonitor.java

thanks

-Sai



On Mon, Nov 1, 2010 at 10:15 AM, Zhongxian Gu <[email protected]> wrote:

> Hi,
>
> I encountered some problems when instrument the byte code of some anonymous
> classes. The scenario is like the following,
>
> in a function call, if it is not a static function, I want to record the
> receiver of this function call, which usually be local variable 0.
>
> So my code is like the following:
>
> mv.visitVarInsn(ALOAD, 0);
> mv.visitMethodInsn(INVOKESTATIC, "java/lang/System", "identityHashCode",
> "(Ljava/lang/Object;)I");
> mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf",
> "(I)Ljava/lang/Integer;");
> mv.visitMethodInsn(INVOKESTATIC, "OutputWrapper", "writeToFile",
> "(Ljava/lang/Object;)V");
>
> Is there any problem with this?
>
> I got the following exception: Exception in thread "main"
> java.lang.VerifyError: (class: Test$1, method: <init> signature: (I)V)
> Expecting to find object/array on stack
>
> Thank you guys.
>
> Best
>
> Zhongxian
> --
> Zhongxian Gu
> http://wwwcsif.cs.ucdavis.edu/~gu/ <http://wwwcsif.cs.ucdavis.edu/%7Egu/>
> Ph.D. Student in Computer Science, UC Davis
> 2249 Kemper Hall
>
>
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-- 

          Thanks

                    Sai

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