2010/9/29 Peter Soetens <peter [..] ...>

> 2010/9/29 Adolfo Rodríguez Tsouroukdissian <
> adolfo [dot] rodriguez [..] ...>:
> > Hello devs,
> >
> > I just stumbled into something unexpected while using Orocos-rtt and the
> > (non-realtime) log4cxx-based logger in ROS. I'll briefly describe the
> > problem in the hopes that it rings a bell somewhere.
>
> You're probably looking at the wrong place. Could it be that you got a
> kernel OOPS
> at the same time ? I.e. look at 'dmesg'.
>

Looks like it's not an OOPS, this is all that is printed on an execution of
the program:

[12984.062821] TimerThreadInst[3745]: segfault at b73f1680 ip b5519e4e sp
b73f1684 error 6 in libc-2.11.1.so[b54d8000+153000]
[12984.085190] Xenomai: native: cleaning up mutex "f8029600" (ret=0).
[12984.085194] Xenomai: native: cleaning up mutex "f802a000" (ret=0).
[12984.085198] Xenomai: native: cleaning up sem "f8029700" (ret=0).
[12984.085201] Xenomai: native: cleaning up sem "f8029780" (ret=0).

Maybe it could be related to our version of Xenomai and how it was
integrated. Will get back to the list when more info is available.
Speculating, the error happens when calling a function with variable number
of arguments (...). Maybe something gets badly mixed along the way.

Thanks again,

Adolfo.

> Peter
>
> >
> > I have a trivial component whose only purpose is to log messages using
> > rosconsole when its configureHook(), startHook(), stopHook() and
> > updateHook() methods are called. The component is periodic, uses
> > ORO_SCHED_OTHER, and is deployed using the ORO_main macro. The attached
> file
> > 'test.cpp' contains the code.
> >
> > When compiled against the gnulinux target everything works well, but when
> > compiled against the xenomai target, the logging statement in
> updateHook()
> > triggers a segfault in the rosconsole code (see attached file
> 'backtrace').
> > Log messages in all other hooks work OK.
> >
> > So, any clues as to why linking against the xenomai target may be causing
> > this crash?.
> >
> > Setup details:
> > gcc (Ubuntu 4.4.3-4ubuntu5) 4.4.3
> > orocos-rtt 1.8.5
> > xenomai 2.4.10 on a 2.6.34 kernel
> > ros cturtle from ubuntu packages 1.2.1-36~lucid
> >
> > Will post a similar inquiry on the ROS list.
> >
> > TIA,
> >
> > Adolfo
> >
> >
> > --
> > Adolfo Rodríguez Tsouroukdissian, Ph. D.
> >
> > Robotics engineer
> > PAL ROBOTICS S.L
> > http://www.pal-robotics.com
> > Tel. +34.93.414.53.47
> > Fax.+34.93.209.11.09
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