Re: [Cygwin] Fix for: detaching crashes the inferior.

[Pedro Alves <pedro_alves@portugalmail.pt>]

Pedro Alves wrote:
> Hi all,
>
> Detaching on Cygwin often crashes the inferior, either
> when gdb attaches to the inferior, or when gdb launches
> the inferior as a child.
>
> Initially I thought that somehow the FLAGS_TRACE_BIT
> would be set in the context, and after detaching there would
> be no debugger to catch the exception, but it turns out that
> it isn't the case - I couldn't find a case where FLAGS_TRACE_BIT
> was set.  But, surprisingly doing a SetThreadContext with
> CONTEXT_CONTROL makes the crashes go away - even if you don't
> change the contents of the context.  I'm not 100% sure why, but,
> it fixes it.  If MSFT sends me the Windows sources, I'll look
> deeper :)

I'm seeing something I missed.  There may be a more correct fix.
Ignore this patch for now.

Cheers,
Pedro Alves