Re: Re: Possible stack frame calc dead code bug again!

Ok, perhaps I reveal my weak knowledge of ASM here, but
ASMifierClassVisitor doesn't appear to have a constructor that can
delegate to another visitor. What am I missing?

- Charlie

On Fri, Sep 9, 2011 at 4:04 PM, Eugene Kuleshov <[email protected]> wrote:
> Charlie,
>
>   You ca just add asmifier visitor before or instead of classwriter into
> visitor chain.
>
>   regards,
>   Eugene
>
> On 2011-09-09 5:02 PM, "Charles Oliver Nutter" <[email protected]> wrote:
>> Ok, I guess I'm not clear how to do that. How do I get ASMIfier to
>> dump something out before I turn it into bytes?
>>
>> - Charlie
>>
>> On Fri, Sep 9, 2011 at 2:07 PM, Charles Oliver Nutter
>> <[email protected]> wrote:
>>> Ok, I'll give it a try.
>>>
>>> On Fri, Sep 9, 2011 at 1:27 PM,  <[email protected]> wrote:
>>>> can you also give the ASMifier code to produce the class, so that we
>>>> have the original bytecode (i.e. before ClassWriter replaces deadcode with
>>>> NOPs)?
>>>>
>>>> Eric
>>>>
>>>> Charles Oliver Nutter wrote:
>>>>> Hello everyone, it's your friendly neighborhood compiler writer who
>>>>> refuses to remove dead code!
>>>>>
>>>>> We have a similar case to the previous bug, though this one appears
>>>>> to
>>>>> only fail verification on Java 7...not on Java 6.
>>>>>
>>>>> The bytecode that fails is shown here:
>>>>> https://gist.github.com/8899f7b0c7f8cd741ef8
>>>>>
>>>>> The error:
>>>>>
>>>>> Stack map does not match the one at exception handler 56 in method
>>>>>
>>>>> blah.block_0$RUBY$__file__(Lblah;Lorg/jruby/runtime/ThreadContext;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/Block;)Lorg/jruby/runtime/builtin/IRubyObject;
>>>>> at offset 29
>>>>> java.lang.VerifyError: Stack map does not match the one at exception
>>>>> handler 56 in method
>>>>>
>>>>> blah.block_0$RUBY$__file__(Lblah;Lorg/jruby/runtime/ThreadContext;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/builtin/IRubyObject;Lorg/jruby/runtime/Block;)Lorg/jruby/runtime/builtin/IRubyObject;
>>>>> at offset 29
>>>>>
>>>>> Other than the version number 51 in the class file, the same bytecode
>>>>> verifies on Java 6. Something got stricter in 7? Something broke?
>>>>>
>>>>> I've attached a zip containing the class file and the full output of
>>>>> dumping the entire class's bytecode.
>>>>>
>>>>> This is running on RC1ish (custom build).
>>>>>
>>>>> Help?!
>>>>>
>>>>> - Charlie
>>>>>
>>>>>
>>>>> --
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>>>>
>>>
>

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