Date: Tue, 2 Feb 2010 02:07:30 +0100 From: Pieter de Goeje <pieter@degoeje.nl> To: freebsd-java@freebsd.org Cc: Joe Lin <jlin@maxiscale.com> Subject: Re: DatagramCahnnel scatter/gather problem on diablo 1.6.0_07-b02 Message-ID: <201002020207.30685.pieter@degoeje.nl> In-Reply-To: <8B6860326495B2438DCBEA74AA981C7A78B22476@MBX01.exg5.exghost.com> References: <8B6860326495B2438DCBEA74AA981C7A78B220E0@MBX01.exg5.exghost.com> <201002011207.57163.pieter@degoeje.nl> <8B6860326495B2438DCBEA74AA981C7A78B22476@MBX01.exg5.exghost.com>
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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
>
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--
Pieter de Goeje
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