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Date: Tue, 18 Jul 2006 00:46:57 +0400
From: "Andrey Chernyshev" <a.y.chernyshev@gmail.com>
To: harmony-dev@incubator.apache.org
Subject: Re: [drlvm] Status of drlvm
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References: <44BB878B.5020505@Intel.com>
	 <23951bd90607170739p291c9d84qf39788f052d61848@mail.gmail.com>

On 7/17/06, Vladimir Gorr <vvgorr@gmail.com> wrote:
> On 7/17/06, Salikh Zakirov <Salikh.Zakirov@intel.com> wrote:
> >
> > Hi,
> >
> > Can anyone share their experience on running DRLVM built from SVN?
> >
> > On my workstations, it requires several fixes in order to run properly:
> >
> > HARMONY-898 'workaround to get correct hythr.dll' (both for Linux and
> > Windows)
> > HARMONY-853 'DRLVM+classlib segfaults in hyzlib' (on Linux)
> >
> > Without HARMONY-898, DRLVM segfaults after reading NULL from TLS.
> > Without HARMONY-853, DRLVM segfaults in libhyzlib.so on Linux.
> >
> > I would suggest that the patches from HARMONY-898 and HARMONY-853 be
> > applied,
> > because DRLVM doesn't work at all for me without these fixes.
> >
> > Any other experiences? Is anyone besides me running DRLVM from SVN?
>
>
>
> I've built the DRLVM on Linux for the following cases:
>
> 1. w/o patches listed above;
>
> 2. w/ H-898 patch;
>
> 3. w/ H-898 & H-853 patches.
>
>
>
> 'Segmentation fault' occurs for all cases, unfortunately.
>

I was able to run most of smoke tests on Linux a few days ago, but now
I'm having the same segfault failure.
Some observations are:

- In the interpreted mode (-Xint option) it reports ClassNotFoundException, so
it seems VM can no longer load the classes from jars on Linux. I was able to run
a single "Hello" class though.

- Segfault actually happens during VM shutdown, after the main() is
already completed with CNFE error. I wasn't able to find the exact
point of segfault though - it seems it happens somewhere in a jitted
code, gdb doesn't show a much of useful info in that case:

#0  0x40788aa2 in malloc_consolidate () from /lib/tls/libc.so.6
#1  0x00000010 in ?? ()
#2  0x4083c7c8 in main_arena () from /lib/tls/libc.so.6
#3  0x00000000 in ?? ()
#4  0x4083c7b4 in main_arena () from /lib/tls/libc.so.6
#5  0x4083c798 in main_arena () from /lib/tls/libc.so.6
#6  0x4083c780 in __malloc_initialize_hook () from /lib/tls/libc.so.6
#7  0x4083aff4 in ?? () from /lib/tls/libc.so.6
#8  0x0855cdd0 in ?? ()
#9  0x00037230 in ?? ()
#10 0x56500158 in ?? ()
#11 0x40789bf6 in _int_free () from /lib/tls/libc.so.6
Previous frame inner to this frame (corrupt stack?)

I'm continuing investigation, the same behavior is observed on Linux
if run with classlib's launcher.

Thanks,
Andrey.

>
>
> Thanks,
>
> Vladimir.
>
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> >
> >
>
>


-- 
Andrey Chernyshev
Intel Middleware Products Division

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