Re: [Qemu-devel] RFC [PATCH] Make bdrv_flush synchronous only and update callers

[Gabriel Kerneis <gabriel@kerneis.info>]

On Tue, Jul 23, 2013 at 02:05:15PM +0200, Stefan Hajnoczi wrote:
> A built-time check for coroutine_fn would be valuable if we ever hope to
> get disciplined with this annotation.
> 
> The check can detect when a coroutine_fn is invoked outside coroutine
> context.  I wonder if Coccinelle can detect this, although I never
> figured out how to use it as a grep-like tool instead of just a
> patch-like tool.

The recent "cps-inference" branch of CPC enables precisely that kind of check.
Charlie is using it to drive his modifications to QEMU and has already suggested
several improvements that I have implemented.  Hopefully we should reach
something fully covering QEMU by the end his GSoC.

If there is interest, I can post a script showing how to build it and use it to
check QEMU annotations (it does not require any modifications to QEMU, only a
couple of configure switches).

Best regards,
-- 
Gabriel