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

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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