Date: Thu, 18 Sep 2008 20:20:23 +0200 From: Tobias Rehbein <tobias.rehbein@web.de> To: Boris Samorodov <bsam@ipt.ru> Cc: freebsd-questions@freebsd.org Subject: Re: Jailing net/skype Message-ID: <20080918182023.GA2827@sushi.pseudo.local> In-Reply-To: <61786698@bs1.sp34.ru> References: <20080911174721.GA10261@sushi.pseudo.local> <20080913173102.GA84554@sushi.pseudo.local> <61786698@bs1.sp34.ru>
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Am Sun, Sep 14, 2008 at 11:26:45PM +0400 schrieb Boris Samorodov:
> Tobias Rehbein <tobias.rehbein@web.de> writes:
>
> > #kdump -f ktrace.out | head
> > 84180 skype CALL access(0x292b2b61,R_OK)
> > 84180 skype NAMI "/compat/linux/etc/ld.so.preload"
> > 84180 skype NAMI "/etc/ld.so.preload"
> > 84180 skype RET access JUSTRETURN
> > 84180 skype CALL open(0x292b2d49,O_RDONLY,<unused>0)
> > 84180 skype NAMI "/compat/linux/etc/ld.so.cache"
> > 84180 skype NAMI "/compat/linux"
> > 84180 skype NAMI "/compat/linux/etc/ld.so.cache"
> > 84180 skype RET open 3
> > 84180 skype CALL freebsd6_mmap(0x3,0xbfbfe324,<invalid>690704336,MAP_SHARED|MAP_PRIVATE|MAP_RENAME|MAP_NORESERVE|MAP_HASSEMAPHORE|MAP_STACK|MAP_NOSYNC,0x2e6f732e,0x68636163,0x646165,0,0,0,0,0,0,0,0,0,... (lots of '0,'s)
> >
> > The funny thing is kdump itself coredumps when dumping the whole thing out (I
> > guess that has something todo with this endless '...0,0,0,0,0...' sequence).
>
> You should use devel/linux_kdump here instead of the native one.
>
Thank you for the hint. I wasn't aware of this tool. Now the output looks
better:
#linux_kdump -f ktrace.out | tail
84180 skype RET gettimeofday 0
84180 skype CALL gettimeofday(0xbfbfd810,0)
84180 skype RET gettimeofday 0
84180 skype PSIG SIGSEGV caught handler=0x82db000 mask=0x0 code=0x0
84180 skype CALL linux_rt_sigprocmask(0x1,0xbfbfd3d8,0,0x8)
84180 skype RET linux_rt_sigprocmask 0
84180 skype CALL linux_tgkill(0x148d4,0x148d4,0x6)
84180 skype RET linux_tgkill 0
84180 skype PSIG SIGIOT SIG_DFL
84180 skype NAMI "skype.core"
Nonetheless I have no clue why it coredumps. Could someone help me interpret
this trace? If needed I can provide the full trace or the core dump.
The problem can't be gettimeofday() I guess?
Thanks in advance
Tobias
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Tobias Rehbein
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