From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <48FCF94C.3000206@domain.hid> Date: Mon, 20 Oct 2008 23:34:04 +0200 From: Jan Kiszka MIME-Version: 1.0 References: <48FCDC52.1070507@domain.hid> <48FCE40C.1080100@domain.hid> <48FCEB70.7030808@domain.hid> <48FCEC25.2040200@domain.hid> <48FCED48.5050608@domain.hid> <48FCF14C.8050103@domain.hid> <48FCF2E2.8050809@domain.hid> <48FCF4FB.1040104@domain.hid> <48FCF74E.1090102@domain.hid> <48FCF86F.3030007@domain.hid> <48FCF8D4.6030507@domain.hid> In-Reply-To: <48FCF8D4.6030507@domain.hid> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig3118A89A9138CEDDE814DB16" Sender: jan.kiszka@domain.hid Subject: Re: [Xenomai-core] Warning when compiling trunk. List-Id: "Xenomai life and development \(bug reports, patches, discussions\)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gilles Chanteperdrix Cc: Xenomai core This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig3118A89A9138CEDDE814DB16 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Gilles Chanteperdrix wrote: > Jan Kiszka wrote: >> Gilles Chanteperdrix wrote: >>> Jan Kiszka wrote: >>>> Gilles Chanteperdrix wrote: >>>>> Gilles Chanteperdrix wrote: >>>>>> Jan Kiszka wrote: >>>>>>> Gilles Chanteperdrix wrote: >>>>>>>> Gilles Chanteperdrix wrote: >>>>>>>>> Jan Kiszka wrote: >>>>>>>>>> Gilles Chanteperdrix wrote: >>>>>>>>>>> I get this warning when compiling trunk: >>>>>>>>>>> >>>>>>>>>>> checking for __thread... rm: cannot remove `conftest1.dir': I= s a directory >>>>>>>>>>> yes >>>>>>>>>>> >>>>>>>>>> That simple, it's a typo in this line: >>>>>>>>>> >>>>>>>>>> http://www.rts.uni-hannover.de/xenomai/lxr/source/configure.in= ?v=3DSVN-trunk#394 >>>>>>>>>> >>>>>>>>>> Also, that rm should be done outside the if block to play safe= =2E >>>>>>>>> Ok. But once this is fixed, I get a segmentation fault with __t= hread on >>>>>>>>> ARM in rt_task_trampoline. I am currently testing the SIGWINCH = thing, >>>>>>>>> and if __thread is disabled, there is no segfault. >>>>>>>> If a #ifdef 0 xeno_set_current, there is no segfault. >>>>>>>> >>>>>>> Interesting. What about removing the initial-exec attributes? Is >>>>>>> __thread otherwise know to work on your platform? >>>>>> Yes. This is a race condition, the real bug is, IMHO: >>>>>> __native_self =3D *iargs->task; >>>>>> When the segfault happens iargs->task is NULL. I suspect you are n= ot >>>>>> supposed to use iargs after the __native_task_create syscall. >>>>> Yes, that was the problem. >>>> What did you change? Can you explain the why to me? >>> Because I guess iargs is no longer valid at this point. So, I saved t= he >>> task pointer and reused it. >>> >> Sorry, makes no sense to me: *iargs is on the stack of the >> rt_task_create caller, and that one is not expected to proceed until w= e >> issue __xn_sys_barrier. >=20 > Well I am busy with the ARM FCSE now. Do you want my test case ? Yes, hoping that it triggers on x86 as well. And is toolchain independent= =2E Jan --------------enig3118A89A9138CEDDE814DB16 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkj8+UwACgkQniDOoMHTA+klhwCfZmbwlGkNui155jsbO6cH76/i aZkAn1RT9UU8V9A8pou/f1RuEAmFFIhg =OuX+ -----END PGP SIGNATURE----- --------------enig3118A89A9138CEDDE814DB16--