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Re: a exit() bug in multithreaded program

From: SHEN Feng
Subject: Re: a exit() bug in multithreaded program
Date: Fri, 30 May 2003 09:31:52 +0800

Hi Dan,
    Our system is Red Hat 9 on IA32.
    This URL contains errors. I cannot find the problem you mentioned.
                  SHEN Feng

----- Original Message ----- 
From: "Dan Kegel" <address@hidden>
To: "SHEN Feng" <address@hidden>
Cc: <address@hidden>; "MAEDA Naoaki" <address@hidden>
Sent: Friday, May 30, 2003 1:17 AM
Subject: Re: a exit() bug in multithreaded program

> SHEN Feng wrote:
> > In the function exit(), the global variable __exit_funcs isn't protected
> > for multithreaded program. But __exit_funcs at __new_exit_fn() in
> > cxa_atexit.c is protected by a lock. The function __new_exit_fn() is
> > called by atexit() and on_exit(). So __exit_funcs at exit() should also
> > be protected by the lock. It’s a bug.
> >
> > I have had a test on this function. The test function exit_test.c and
> > the result file exit_test_result_redhat.log are attached. From them we
> > can concluded that the exit() may be unsafe in multithreaded program.
> Hi Feng,
> you didn't mention which version of glibc or the operating system;
> that makes it a bit harder to help.
> Assuming you're using the version shipped with Red Hat 9,
> this sounds vaguely related to a problem mentioned on the NPTL mailing list:
> https://listman.redhat.com/archives/phil-list/20
> You might want to subscribe there; see
> https://listman.redhat.com/mailman/listinfo/phil-list
> - Dan

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