Re: Re: NOP ATHROW hack defeated !

I will give it a shot and let you know. Thanks!

- Charlie

On Thu, Jun 9, 2011 at 2:15 AM,  <[email protected]> wrote:
> the ASM patch I sent a few weeks ago had a bug: it was updating the exception handler list, without updating the number of elements in this list (in 'handlerCount'). Here is a new version which fixes this issue. Does it solve your problem?
>
> Eric
>
> 07/06/2011 23:02, Charles Oliver Nutter wrote:
>> Sorry, here's that link.
>>
>> https://gist.github.com/1013088
>>
>> On Tue, Jun 7, 2011 at 4:02 PM, Charles Oliver Nutter
>> <[email protected]>  wrote:
>>> Ok, here's ASMifier output of a class that breaks. I turned off stack
>>> map calculation so it wouldn't do the rewriting. Hopefully modifying
>>> this to turn the stack map calculation back on will trigger the
>>> problem. I'll play with it more, but this is at least a start at it...
>>>
>>> - Charlie
>>>
>>> On Tue, Jun 7, 2011 at 3:24 PM, Charles Oliver Nutter
>>> <[email protected]>  wrote:
>>>> Trying to get you something right now; It will probably have JRuby
>>>> dependencies, but I can try to strip them out later if possible. At
>>>> least it will give you an example to go on.
>>>>
>>>> - Charlie
>>>>
>>>> On Sat, May 21, 2011 at 4:58 AM, Eric Bruneton<[email protected]>  wrote:
>>>>> 18/05/2011 22:28, Charles Oliver Nutter wrote:
>>>>>>
>>>>>> Now I have a case where the ASM dead code rewriting breaks on Java 7
>>>>>> but not Java 6:
>>>>>> So it's a while loop with a break inside a rescued method body. The
>>>>>> code emitted for the while loop looks like this:
>>>>>>
>>>>>>     L5
>>>>>>      LINENUMBER 2 L5
>>>>>>      GOTO L6
>>>>>>     L7
>>>>>>     L8
>>>>>>      LINENUMBER 3 L8
>>>>>>      ALOAD 1
>>>>>>      GETFIELD org/jruby/runtime/ThreadContext.nil :
>>>>>> Lorg/jruby/runtime/builtin/IRubyObject;
>>>>>>      GOTO L9
>>>>>>     L10
>>>>>>      POP
>>>>>>     L6
>>>>>>      ALOAD 9
>>>>>>      INVOKEINTERFACE org/jruby/runtime/builtin/IRubyObject.isTrue ()Z
>>>>>>      IFNE L7
>>>>>
>>>>> can you send us the corresponding ASMifier code (for the whole
>>>>> method/class), so that we can reproduce the bug?
>>>>>
>>>>> Eric
>>>>>
>>>>
>>>
>>
>
>

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