Re: [Qemu-devel] [PATCH 1/3] coroutine: adding sigaltstack method (.c source)

[Paolo Bonzini]

On 02/14/2012 10:24 AM, Stefan Hajnoczi wrote:
> setjmp() followed by return is usually bad.  We're relying on the fact
> that the return code path here does not clobber local variables 'self'
> and 'co'.  Can't we longjmp out back to the coroutine_new() function
> instead?

http://www.gnu.org/software/pth/rse-pmt.ps covers this.  Basically, this 
turned out to be more portable than longjmp from a signal handler.

Paolo