Re: how to dump code for JET?

[xiaoming gu <xi...@gmail.com>]

Thanks, Egor. The information is quite helpful.

Xiaoming

On Sun, Mar 1, 2009 at 2:56 AM, Egor Pasko <eg...@gmail.com> wrote:

> On the 0x564 day of Apache Harmony xiaoming gu wrote:
> > Hi, all. I'm working on a bug with JET. Now I need to know a bytecode and
> > its corresponding binary code. But after checking the webpage [1], I
> > couldn't figure out the way. Do we need specify some command option for
> > jet.log?
>
> I did not know that either, so I looked into the code and understood
> how outdated the documentation is :) Finally I went with my favourite
> combo for logging compilation of main() (from [2]):
>
> path/to/java -Xem:jet -XX:jit.p.filter=.main -XX:jit.p.arg.log=ct,cg
> YourClass
>
> now read the file in .:
>
> log/JET/YourClass/main\(\[Ljava_lang_String\;\)V/ct.log
>
> pseudo x86 instructions are kind of ... printed, not ideal at all
> though, hope this works for you. If it does not, there is another
> chance to pick the disassembling lib as described in [3]. I did not
> try it yet.
>
> more details about log= possibilities are in [4].
>
> > And what is ij executable? Thanks.
>
> huh, it is the name of the 'java' executable as contributed originally
> by intel. This document did not change since then.
>
> > Xiaoming
> >
> > [1]
> >
> http://harmony.apache.org/subcomponents/drlvm/debugging_VM_and_JIT.html#Debugging_JIT
>
> [2] http://harmony.apache.org/cmd_options.html
>
> [3] http://issues.apache.org/jira/browse/HARMONY-1402
>
> [4] jitrino/src/jet/compiler.cpp:1628
>
> --
> Egor Pasko
>
>


-- 
China Runtime Technologies Lab,
SSG/SSD/MRTC, Intel