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Date: Wed, 23 Jul 2008 16:19:16 -0500 (CDT)
From: "Sean C. Farley" <scf@FreeBSD.org>
To: Chagin Dmitry <chagin.dmitry@gmail.com>
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Cc: Roman Divacky <rdivacky@FreeBSD.org>, freebsd-emulation@FreeBSD.org
Subject: Re: kern/122318 (CMake core dumping, chroot exiting)
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On Thu, 24 Jul 2008, Chagin Dmitry wrote:

> On Wed, 23 Jul 2008, Sean C. Farley wrote:
>> 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
>
> hi!
>
> Please, can you run ktrace with -i flag?
>
> thnx!

No problem.  Same URL.  The countless meetings this week are destroying
my mind; I was thinking -d did what -i actually does.  :)

Sean
-- 
scf@FreeBSD.org