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

Will do.

- Charlie (mobile)

On Sep 9, 2011, at 17:31, Eugene Kuleshov <[email protected]> wrote:

> You are right. But can you replace classwriter with asmifier just for this class? It wont write bytecode, but you'll get the source code dumped instead.
> 
>   regards,
>   Eugene
> On 2011-09-09 5:43 PM, "Charles Oliver Nutter" <[email protected]> wrote:
> > 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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