Re: [Qemu-devel] qemu on MacOS, failing to respond to ctrl-C

[Peter Maydell]

On 17 February 2013 15:50, Blue Swirl <address@hidden> wrote:
> On Sun, Feb 17, 2013 at 12:59 AM, Peter Maydell
> <address@hidden> wrote:
>> However, having thought about this I'm now a bit dubious about
>> the use of longjmp in cpu_resume_from_signal() -- this is
>> jumping out of a signal handler, so if we do nothing with
>> the signal mask surely we'll end up running the CPU thread
>> with that signal blocked when it was not before? I don't know
>> why this doesn't cause issues on Linux...
>
> Long time ago, QEMU did not use any threads. They were introduced by
> CONFIG_IOTHREAD which then took over.

Yes, but even in a single-threaded model, if you longjmp
out of a signal handler for SIGSEGV or whatever then SIGSEGV
is going to remain blocked by mistake...

-- PMM