Re: Re: Re: bytecode verification

Luc, do you call the super constructor in your constructor ?

Something like:
aload 0
invokespecial java/lang/Object.<init>()V

Rémi

Le 11/11/2010 15:09, Chris Dennis a écrit :
> Although development has pretty much ceased on BCEL 
> (http://jakarta.apache.org/bcel/), the JustIce verifier contained 
> within it is imho still the best and most thorough bytecode verifier 
> out there.  It will probably be able to help you hunt down the problem.
>
> Chris
>
> On Nov 10, 2010, at 8:34 PM, Yao Qi wrote:
>
>> On Wed, Nov 10, 2010 at 1:01 PM, luc peuvrier at home 
>> <[email protected]> wrote:
>>> When JVM load my transformed code I have the here below error:
>>> java.lang.VerifyError: (class:
>>> net/sf/joafip/store/service/objectfortest/Bob1, method: <init> 
>>> signature:
>>> (Lnet/sf/joafip/store/service/proxy/IInstanceFactory;Z)V) Expecting 
>>> to find
>>> object/array on stack
>>>
>>> The error is not verbose and not helpfull to make able to debug.
>>>
>>
>> You can dump your instrumented byte code into file, and using javap to
>> check the byte code,
>> especially in Bob1 (IInstanceFactory, ).  You should find the problem.
>> I did this
>> many times before. :)
>>
>>> So I used CheckClassAdapter.verify on my transformed code expecting 
>>> verbose
>>> error report, but it accept the byte code.
>>>
>>> It seems CheckClassAdapter.verify has not the same behaviour man the JM
>>> bytecode verifier.
>>
>> Yeah, different JVM has different security/verification checking,
>> mostly more strict
>> than CheckClassAdapter.verify.
>>
>>>
>>> Witch tools make able to verify bytecode like jvm verifier but with 
>>> verbose
>>> output for debug purpose ?
>>
>> I was looking for that tool for a long time, but unfortunately, I
>> didn't  get anything
>> useful.
>>
>> -- 
>> Yao Qi <qiyaoltc AT gmail DOT com>
>> http://sites.google.com/site/duewayqi/
>>
>> -- 
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