From: Nikola Ciprich <nikola.ciprich@linuxbox.cz>
To: Jan Dittmer <jdi@l4x.org>
Cc: user-mode-linux-devel@lists.sourceforge.net
Subject: Re: [uml-devel] Programs in guest segfault, amd64 host and guest
Date: Thu, 19 Oct 2006 00:03:41 +0300 [thread overview]
Message-ID: <453696AD.8020903@linuxbox.cz> (raw)
In-Reply-To: <45367D7E.9040609@l4x.org>
try exporting LD_ASSUME_KERNEL=2.4.1 before executing Your application,
to see if that works - this disables usage of NPTL
Jan Dittmer wrote:
> Jeff Dike wrote:
>
>> On Wed, Oct 18, 2006 at 05:33:50PM +0200, Jan Dittmer wrote:
>>
>>> clone(Process 484 attached
>>> child_stack=0x4244e280,
>>> flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID|CLONE_DETACHED,
>>> parent_tidptr=0x4244e9f0, tls=0x4244e960, child_tidptr=0x4244e9f0) = 484
>>> [pid 483] rt_sigprocmask(SIG_SETMASK, [], <unfinished ...>
>>> [pid 484] --- SIGSEGV (Segmentation fault) @ 0 (0) ---
>>> Process 484 detached
>>> <... rt_sigprocmask resumed> NULL, 8) = 0
>>> +++ killed by SIGSEGV +++
>>>
>> I suspect it's due to UML/x86_64 having incomplete NPTL support,
>> although I've had almost no problems with up-to-date Fedora
>> filesystems on x86_64. The one thing I do see is yum segfaulting
>> occassionally, but I haven't been able to tie that to NPTL.
>>
>
> This is 100% reproducible here. Perfect test case. How to debug?
>
> Jan
>
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next prev parent reply other threads:[~2006-10-18 21:03 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-10-18 15:33 [uml-devel] Programs in guest segfault, amd64 host and guest Jan Dittmer
2006-10-18 19:09 ` Jeff Dike
2006-10-18 19:16 ` Jan Dittmer
2006-10-18 21:03 ` Nikola Ciprich [this message]
2006-10-18 21:05 ` Jeff Dike
2006-10-18 21:25 ` Jan Dittmer
2006-10-20 16:33 ` Jeff Dike
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