[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Tue, 27 Mar 2018 12:51:54 +0000
From: <Salman.Ahmed@...dmueller.com>
To: <jens.gustedt@...ia.fr>
CC: <musl@...ts.openwall.com>
Subject: AW: segmentation fault on pthread_detach
Hi Jens,
Thanks for the clarification. So I guess with musl I have to remove the pthread_detach (which is redundant anyways after a successful join) or call it only if pthread_join returns an error?
Regards
Salman
-----Ursprüngliche Nachricht-----
Von: Jens Gustedt [mailto:jens.gustedt@...ia.fr]
Gesendet: Dienstag, 27. März 2018 14:33
An: Ahmed, Salman <Salman.Ahmed@...dmueller.com>
Cc: musl@...ts.openwall.com
Betreff: Re: [musl] segmentation fault on pthread_detach
Hello Salman,
On Tue, 27 Mar 2018 12:00:39 +0000 <Salman.Ahmed@...dmueller.com> wrote:
> My application using musl libc runs into a seg fault if I call
> pthread_detach after pthread_join on the same thread. From my
> understanding pthread_detach should return ESRCH if a previous join
> was called on a particular thread. That’s the correct behavior I see
> if I run my program with glibc. But on my LEDE based router I run into
> the seg fault issue. The cross compiling toolchain I use is
> arm_cortex-a9+neon_gcc-5.4.0_musl-1.1.16_eabi. Simple example I used
> for testing is below.
I don't think that your expectation is correct. The POSIX standard
states:
> The behavior is undefined if the value specified by the thread
> argument to pthread_detach() does not refer to a joinable thread.
(a thread that has already been joined is not joinable)
This is for good reasons. The system must be able to dispose of all resources that a thread occupied after it has been joined. The memory will be reused, in particular there may be a new thread that uses the same identifier.
Jens
--
:: INRIA Nancy Grand Est ::: Camus ::::::: ICube/ICPS :::
:: ::::::::::::::: office Strasbourg : +33 368854536 ::
:: :::::::::::::::::::::: gsm France : +33 651400183 ::
:: ::::::::::::::: gsm international : +49 15737185122 ::
:: http://icube-icps.unistra.fr/index.php/Jens_Gustedt ::
________________________________
Kommanditgesellschaft - Sitz: Detmold - Amtsgericht Lemgo HRA 2790 -
Komplementärin: Weidmüller Interface Führungsgesellschaft mbH -
Sitz: Detmold - Amtsgericht Lemgo HRB 3924;
Geschäftsführer: José Carlos Álvarez Tobar, Elke Eckstein, Jörg Timmermann;
USt-ID-Nr. DE124599660
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
