Date: Mon, 1 Feb 2010 21:31:14 -0800 From: Greg Lewis <glewis@eyesbeyond.com> To: Joe Lin <jlin@maxiscale.com> Cc: Pieter de Goeje <pieter@degoeje.nl>, "freebsd-java@freebsd.org" <freebsd-java@freebsd.org> Subject: Re: DatagramCahnnel scatter/gather problem on diablo 1.6.0_07-b02 Message-ID: <20100202053114.GA90683@misty.eyesbeyond.com> In-Reply-To: <8B6860326495B2438DCBEA74AA981C7A78B224DE@MBX01.exg5.exghost.com> References: <8B6860326495B2438DCBEA74AA981C7A78B220E0@MBX01.exg5.exghost.com> <201002011207.57163.pieter@degoeje.nl> <8B6860326495B2438DCBEA74AA981C7A78B22476@MBX01.exg5.exghost.com> <201002020207.30685.pieter@degoeje.nl> <8B6860326495B2438DCBEA74AA981C7A78B224DE@MBX01.exg5.exghost.com>
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On Mon, Feb 01, 2010 at 07:13:56PM -0600, Joe Lin wrote:
> I think that is the problem. As I looked at the code in DatagramDispatcher.c:writev0(), these fields only got zeroed out in solaris or linux:
>
> m.msg_name = NULL;
> m.msg_namelen = 0;
> m.msg_iov = iov;
> m.msg_iovlen = len;
> #ifdef __solaris__
> m.msg_accrights = NULL;
> m.msg_accrightslen = 0;
> #endif
>
> #ifdef __linux__
> m.msg_control = NULL;
> m.msg_controllen = 0;
> #endif
So, if you make the second #ifdef into
#if defined(__linux__) || defined(_ALLBSD_SOURCE)
what happens?
> -----Original Message-----
> From: Pieter de Goeje [mailto:pieter@degoeje.nl]
> Sent: Monday, February 01, 2010 5:08 PM
> To: freebsd-java@freebsd.org
> Cc: Joe Lin
> Subject: Re: DatagramCahnnel scatter/gather problem on diablo 1.6.0_07-b02
>
> On Monday 01 February 2010 23:42:27 Joe Lin wrote:
> > Did a struss and the error happened with sendmsg call:
> >
> > sendmsg(0x4,0x7fffffbfe580,0x0,0x1,0x2,0x830c17de8) ERR#22 'Invalid
> > argument'
>
> The struss output is broken because sendmsg only takes 3 arguments. It seems
> that java passes bogus data in msg_flags and possibly msg_control and
> msg_controllen fields of struct msghdr:
>
> (gdb) p *m
> $4 = {msg_name = 0x0, msg_namelen = 0, msg_iov = 0x5dee4e00, msg_iovlen = 2,
> msg_control = 0x29012e74, msg_controllen = 10480328, msg_flags = 740777920}
>
>
> >
> > -----Original Message-----
> > From: Pieter de Goeje [mailto:pieter@degoeje.nl]
> > Sent: Monday, February 01, 2010 3:08 AM
> > To: freebsd-java@freebsd.org
> > Cc: Joe Lin
> > Subject: Re: DatagramCahnnel scatter/gather problem on diablo 1.6.0_07-b02
> >
> > On Monday 01 February 2010 02:08:55 Joe Lin wrote:
> > > Thanks for the reply. I looked at JDK source code and it appears that the
> > > JNI call should be in
> > >
> > > J2se/src/solaris/native/sun/nio/ch/DatagramDispatcher.c:write0():
> > >
> > >
> > > There's only linux and solaris #ifdef but not for BSD. I wonder how/what
> > > BSD is calling. Since I'm getting a "IOException:Invalid argument" so I
> > > guess this should correspond to a EINVAL. And a sendmsg() in FreeBSD does
> > > not return an EINVAL. So the Diablo port must be calling a writev(). But
> > > I could not locate the source code. Wish I can find out what went wrong
> > > with dialblo VM.
> >
> > You could use ktrace/kdump to find out what it (not?) calls and why it
> > dies.
> >
> > - Pieter
> >
> > No virus found in this incoming message.
> > Checked by AVG - www.avg.com
> > Version: 9.0.733 / Virus Database: 271.1.1/2649 - Release Date: 01/30/10
> > 22:39:00 _______________________________________________
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> > http://lists.freebsd.org/mailman/listinfo/freebsd-java
> > To unsubscribe, send any mail to "freebsd-java-unsubscribe@freebsd.org"
>
>
>
> --
> Pieter de Goeje
>
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> Checked by AVG - www.avg.com
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--
Greg Lewis Email : glewis@eyesbeyond.com
Eyes Beyond Web : http://www.eyesbeyond.com
Information Technology FreeBSD : glewis@FreeBSD.org
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