[stunnel-users] Fix unexpected stunnel-4.10 exits on FreeBSD

Michal Trojnara Michal.Trojnara at mirt.net
Wed Jun 15 17:50:57 CEST 2005

On 2005-06-15, at 17:32, Vasil Dimov wrote:
>>>> +     makecontext(&ctx_cleanup, ctx_cleanup_func, 0);
>>> Changing the currently executing context (with makecontext) does not
>>> seem very robust to me, but, however, I am not an ucontext expert
>>> (in fact I have not heard about it before beginning to experience
>>> problems with stunnel-4.10).
>> makecontext(3) only prepares the structure.
>> setcontext(2) modifies the context.
> I meant "Changing" in the means of alter/modify/edit/mutate, not
> switch/swap/replace. But however, the patch seems to work.

By "context" I mean the actual CPU state, not the structure used as a 
parameter to set it.  8-)

> So we have "4.10 + some diagnostic code" that crashes in swapcontext()
> under Linux. Knowing that 4.10 does not crash under Linux we are forced
> to deduce that the problem is in the diagnostic code :)

The problem is solved!  It was linuxthreads/ucontext conflict in glibc.

Best regards,

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