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Date: Wed, 23 Jul 2008 15:01:24 -0500 (CDT)
From: "Sean C. Farley" <scf@FreeBSD.org>
To: Roman Divacky <rdivacky@FreeBSD.org>
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Cc: freebsd-emulation@FreeBSD.org
Subject: Re: kern/122318 (CMake core dumping, chroot exiting)
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On Wed, 23 Jul 2008, Roman Divacky wrote:

> On Wed, Jul 23, 2008 at 12:50:51PM -0500, Sean C. Farley wrote:
>> I am seeing if anyone has any insight on this PR (kern/122318[1]).
>> It would be nice to once again build using cmake within a Linux
>> chroot.  :)
>>
>> Basically, the bug is that not only that cmake is dumping core; it is
>> also forcing the user out of the chroot environment.  Here is the
>> command used to start the chroot:
>> /compat/linux/usr/sbin/chroot <chroot path> su - <build user>
>>
>>   1. http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/122318
>
> looking at the trace you provided I guess this is what's going on:
>
> cmake forks/execs gcc and waits to be notified about the success of
> the command it tried, the notification comes (the SIGCHLD) the handler
> tries do something and then returns and now something is wrong and it
> receives the SIGSEGV..
>
> or am I wrong and linux_ktrace does not translate signals and the
> SIGCHLD is in fact SIGTSTP?
>
> what is the fd 3 and 4? can you provide full ktrace.out?

I have the full output of the execution here using ktrace -d:
http://www.farley.org/freebsd/tmp/cmake-kdump.txt

Sean
-- 
scf@FreeBSD.org