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Re: [C/POSIX] pthread_exit()

From Melzzzzz <mel@zzzzz.com>
Newsgroups comp.lang.c
Subject Re: [C/POSIX] pthread_exit()
Date 2016-07-25 13:47 +0200
Organization albasani.net
Message-ID <20160725134725.765c4080@maxa-pc> (permalink)
References <slrnnovao6.boo.jkb@rayleigh.systella.fr> <20160723005217.73ba92bf@maxa-pc> <slrnnpburt.kce.jkb@rayleigh.systella.fr>

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On Mon, 25 Jul 2016 11:43:57 +0000 (UTC)
JKB <jkb@koenigsberg.invalid> wrote:

> Le Sat, 23 Jul 2016 00:52:17 +0200,
> Melzzzzz <mel@zzzzz.com> écrivait :
> > On Wed, 20 Jul 2016 16:47:01 +0000 (UTC)
> > JKB <jkb@koenigsberg.invalid> wrote:
> >  
> >> 	Hello,
> >> 
> >> 	I'm debugging a huge program that can enter in deadlock on
> >> a pthread_exit() syscall. I use gcc compiler on Linux or NetBSD.  
> >
> > Do you observe same behavior on both systems?  
> 
> 	Not exactly. On Linux side, pthread_exit() enters in a
> deadlock. On NetBSD side, I don't know. Execution stops, but when I
> try to attach gdb on faulty process, it abots with sigtrap if I
> remember.
> 
> 	I'm sure there is an issue in my code, and I'm not sure that
> it is pthread related. pthread_exit() only triggers the bug. It's not
> a memory corruption, maybe a race condition, but I have looked for
> 	this condition with a piece of paper without any result.
> 
> 	Best regards,
> 
> 	JKB
> 

If pthread_exit enters deadlock that means either something holds lock
or mutex memory is corrupted. NetBSD case shows that probably memory is
corrupted rather deadlock...

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[C/POSIX] pthread_exit() JKB <jkb@koenigsberg.invalid> - 2016-07-20 16:47 +0000
  Re: [C/POSIX] pthread_exit() "James R. Kuyper" <jameskuyper@verizon.net> - 2016-07-20 13:42 -0400
    Re: [C/POSIX] pthread_exit() Keith Thompson <kst-u@mib.org> - 2016-07-20 11:33 -0700
    Re: [C/POSIX] pthread_exit() JKB <jkb@koenigsberg.invalid> - 2016-07-21 10:10 +0000
    Re: [C/POSIX] pthread_exit() Randy Howard <rhoward.mx@EverybodyUsesIt.com> - 2016-07-22 08:10 -0500
      Re: [C/POSIX] pthread_exit() JKB <jkb@koenigsberg.invalid> - 2016-07-22 13:42 +0000
        Re: [C/POSIX] pthread_exit() Randy Howard <rhoward.mx@EverybodyUsesIt.com> - 2016-07-22 09:44 -0500
          Re: [C/POSIX] pthread_exit() JKB <jkb@koenigsberg.invalid> - 2016-07-22 14:48 +0000
      Re: [C/POSIX] pthread_exit() Richard Heathfield <rjh@cpax.org.uk> - 2016-07-22 14:52 +0100
      Re: [C/POSIX] pthread_exit() supercat@casperkitty.com - 2016-07-22 08:51 -0700
      Re: [C/POSIX] pthread_exit() James Kuyper <jameskuyper@verizon.net> - 2016-07-22 13:26 -0400
      Re: [C/POSIX] pthread_exit() Keith Thompson <kst-u@mib.org> - 2016-07-22 10:28 -0700
        Re: [C/POSIX] pthread_exit() Ian Collins <ian-news@hotmail.com> - 2016-07-23 16:12 +1200
        Re: [C/POSIX] pthread_exit() Randy Howard <rhoward.mx@EverybodyUsesIt.com> - 2016-07-23 16:43 -0500
          Re: [C/POSIX] pthread_exit() "James R. Kuyper" <jameskuyper@verizon.net> - 2016-07-23 18:17 -0400
            Re: [C/POSIX] pthread_exit() Keith Thompson <kst-u@mib.org> - 2016-07-23 20:45 -0700
            Re: [C/POSIX] pthread_exit() James Kuyper <jameskuyper@verizon.net> - 2016-07-24 07:27 -0400
              Re: [C/POSIX] pthread_exit() Randy Howard <rhoward.mx@EverybodyUsesIt.com> - 2016-07-25 15:22 -0500
                Re: [C/POSIX] pthread_exit() Ian Collins <ian-news@hotmail.com> - 2016-07-26 08:26 +1200
                Re: [C/POSIX] pthread_exit() "James R. Kuyper" <jameskuyper@verizon.net> - 2016-07-25 16:32 -0400
                Re: [C/POSIX] pthread_exit() Randy Howard <rhoward.mx@EverybodyUsesIt.com> - 2016-07-25 15:52 -0500
                Re: [C/POSIX] pthread_exit() "James R. Kuyper" <jameskuyper@verizon.net> - 2016-07-25 16:59 -0400
                Re: [C/POSIX] pthread_exit() Randy Howard <rhoward.mx@EverybodyUsesIt.com> - 2016-07-25 16:36 -0500
  Re: [C/POSIX] pthread_exit() Johann Klammer <klammerj@NOSPAM.a1.net> - 2016-07-21 11:54 +0200
    Re: [C/POSIX] pthread_exit() JKB <jkb@koenigsberg.invalid> - 2016-07-22 08:17 +0000
      Re: [C/POSIX] pthread_exit() JKB <jkb@koenigsberg.invalid> - 2016-07-22 08:47 +0000
  Re: [C/POSIX] pthread_exit() Melzzzzz <mel@zzzzz.com> - 2016-07-23 00:52 +0200
    Re: [C/POSIX] pthread_exit() JKB <jkb@koenigsberg.invalid> - 2016-07-25 11:43 +0000
      Re: [C/POSIX] pthread_exit() Melzzzzz <mel@zzzzz.com> - 2016-07-25 13:47 +0200
        Re: [C/POSIX] pthread_exit() JKB <jkb@koenigsberg.invalid> - 2016-07-25 11:58 +0000
          Re: [C/POSIX] pthread_exit() Melzzzzz <mel@zzzzz.com> - 2016-07-25 14:00 +0200
            Re: [C/POSIX] pthread_exit() JKB <jkb@koenigsberg.invalid> - 2016-07-25 12:18 +0000
              Re: [C/POSIX] pthread_exit() Melzzzzz <mel@zzzzz.com> - 2016-07-25 14:20 +0200
                Re: [C/POSIX] pthread_exit() JKB <jkb@koenigsberg.invalid> - 2016-07-25 12:26 +0000
                Re: [C/POSIX] pthread_exit() Melzzzzz <mel@zzzzz.com> - 2016-07-25 14:28 +0200
                Re: [C/POSIX] pthread_exit() JKB <jkb@koenigsberg.invalid> - 2016-07-25 12:35 +0000
                Re: [C/POSIX] pthread_exit() JKB <jkb@koenigsberg.invalid> - 2016-07-25 13:44 +0000

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