Re: [PATCH] exit.3: ATTRIBUTES: Note function that is not thread-safe

[Michael Kerrisk <mtk.manpages-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

Hello Peng,

NOTE: I have not yet applied this patch. See comments below.

On 05/03/13 11:18, Peng Haitao wrote:
> The function exit() is not thread safe.
> 
> Signed-off-by: Peng Haitao <penght-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org>
> ---
>  man3/exit.3 | 5 +++++
>  1 file changed, 5 insertions(+)
> 
> diff --git a/man3/exit.3 b/man3/exit.3
> index 51163e4..5e607b1 100644
> --- a/man3/exit.3
> +++ b/man3/exit.3
> @@ -87,6 +87,11 @@ termination, respectively.
>  The
>  .BR exit ()
>  function does not return.
> +.SH ATTRIBUTES
> +.SS Multithreading (see pthreads(7))
> +The
> +.BR exit ()
> +uses a global variable that is not protected, so it is not thread-safe.

Ouch! Really? so one cannot call exit(3) from a multithreaded program?
This seems a clear violation of the standard. 

Could you provide some pointers to more information on this point (e.g., URL
of mail thread archive discussions.)

Thanks,

Michael

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