Re: [Robert Sim <simra@cim.mcgill.ca>] libc/1706: libpthread,multiprocessor linux and fgets/getline

[Kaz Kylheku <kaz at ashi dot footprints dot net>]

On Thu, 27 Apr 2000, Robert Sim wrote:

> Date: Thu, 27 Apr 2000 00:23:46 -0400 (EDT)
> From: Robert Sim <simra@cim.mcgill.ca>
> To: Andreas Jaeger <aj@suse.de>
> Cc: libc-alpha Mailinglist <libc-alpha@sourceware.cygnus.com>
> Subject: Re: [Robert Sim <simra@cim.mcgill.ca>] libc/1706: libpthread,
     multiprocessor linux and fgets/getline
> 
> Hi,
> 
> I have some follow-up on my bug report, and I wasn't sure where or how to
> post it- my apologies if I am spamming the wrong list.
> 
> I just want to add that the bug occurs even if the fgets calls are guarded
> by a mutex and, even worse, even if only a single thread of execution is
> spawned. 

Then it may happen even if you just call that function with the main thread and
don't call pthread_create. Can you try that?

If it still occurs with the main thread only, can then see whether the problem
still occurs when you don't link in -pthread.

This is significant, because it could rule out the threading library as the
cause. There are certain pthread_ functions used by libio which are stubbed
out when libpthread isn't linked in.