Re: Possible stack frame calc dead code bug again!

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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