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Date:	Mon, 10 Aug 2009 13:30:15 +0200
From:	Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To:	cygwin AT cygwin DOT com
Subject:	Re: simple multithread program fails on Cygwin, succeeds on Linux
Message-ID:	<20090810113015.GK3204@calimero.vinschen.de>
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On Aug 10 12:13, Bruno Haible wrote:
> Hi,
> 
> The attached test program for pthread_once uses the following basic POSIX
> threads functions:
>   pthread_create
>   pthread_join
>   pthread_mutex_init
>   pthread_mutex_lock
>   pthread_mutex_unlock
>   pthread_once
>   pthread_rwlock_init
>   pthread_rwlock_rdlock
>   pthread_rwlock_unlock
>   pthread_rwlock_wrlock
> 
> On Linux with glibc 2.8:
>   $ gcc bug.c -O -Wall -lpthread -o bug
>   $ ./bug
>   Starting test_once ... OK
> The test completes in about 4 seconds.
> 
> On Cygwin 1.5.25(0.156/4/2):
>   $ gcc bug.c -O -Wall -o bug.exe         
>   $ ./bug.exe
>   Starting test_once ...
> Either it does not terminates (still running after half an hour, eating
> 100% CPU time on one of the two CPUs), or it crashes rather quickly:
>   $ ./bug.exe
>   Starting test_once ...Segmentation fault (core dumped)

WJFFM under Cygwin 1.7.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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