It does technically sound like there is a gap in the emulation, yes. Though, since interrupts are normally transparent to user space software, you'd have to use

It does technically sound like there is a gap in the emulation, yes. Though, since interrupts are normally transparent to user space software, you'd have to use something like ptrace or be messing with the signal delivery mechanism to even have a chance at noticing the gap. And you'd have to do quite obscure and absurd things even by those APIs' standards.