Re: [Qemu-devel] linux-user crashing in multi-threaded programs

[Peter Maydell]

On 21 November 2011 10:07, Alexander Graf <address@hidden> wrote:
> On 21.11.2011, at 10:59, Peter Maydell wrote:
>> You can hit this bug even single-threaded or in system mode:
>> it's just that aggressively multi-threaded user apps are the
>> easiest way to trigger it. So I don't think we can ever use
>> the tb-unlinking code safely.
>
> Not sure I understand. I thought it's a race between multiple
>threads trying to chain/unchain TBs at the same time? How can
> that happen in system or single-threaded mode?

It's a race between (a) a thread executing code and (b) any
other thread or signal handler that calls cpu_exit(). So (b)
can be the IO thread, or the linux-user host_signal_handler().

-- PMM