Re: [Boost-users] boost::thread and helgrind

Subject: Re: [Boost-users] boost::thread and helgrind
From: Frederick Roth (f-roth_at_[hidden])
Date: 2012-01-12 02:51:32

On Thu, 05 Jan 2012 09:04:46 +0100, Frederick Roth wrote:
> On Wed, 04 Jan 2012 22:01:01 +0100, Vicente J. Botet Escriba wrote:
>> Le 04/01/12 09:46, Frederick Roth a écrit :
>>> I am currently fooling around with boost::thread. After writing a 
>>> short example program (featuring boost::thread and 
>>> boost::interprocess::interprocess_semaphore), I ran helgrind against 
>>> it and got some "Possible data race" errors.
>>>
>>
>> could you add the reported "possible data race"?
>
> Sure:
>
> ==2743== Possible data race during read of size 4 at 0x46c6d32c by 
> thread #3
> ==2743==    at 0x46C5FE93: ??? (in 
> /usr/lib/libboost_thread-mt.so.1.47.0)
> ==2743==    by 0x467F8CD2: start_thread (in 
> /lib/libpthread-2.14.90.so)
> ==2743==    by 0x4670283D: clone (in /lib/libc-2.14.90.so)
> ==2743==  This conflicts with a previous write of size 4 by thread #2
> ==2743==    at 0x46C5FFA1: ??? (in 
> /usr/lib/libboost_thread-mt.so.1.47.0)
> ==2743==    by 0x46C601A4:
> 
> boost::detail::set_current_thread_data(boost::detail::thread_data_base*)
> (in /usr/lib/libboost_thread-mt.so.1.47.0)
> ==2743==    by 0x467F8CD2: start_thread (in 
> /lib/libpthread-2.14.90.so)
> ==2743==    by 0x4670283D: clone (in /lib/libc-2.14.90.so)

As no one called me a fool after posting my code I will assume that 
there is no obvious error in my code. I would still be interested if the 
problem is on my side or another. Does it make sense to repost this on 
the boost.threads development list or open a bug. I don't want to steal 
anybodies time but I am really interested in information about my 
problem.

Fred