That's fake cooperative emulation of signals. It isn't preemptive (unless someone got a kernel driver approved while I wasn't looking?) thus many things either work poorly or not at all. Pause-the-world GC algorithms are a good example. Coroutine implementations also have to be cooperative.
If you're curious, I believe the issue was discussed at length in the Go GitHub issues years ago. Also on the mailing lists of many other languages.
That's fake cooperative emulation of signals. It isn't preemptive (unless someone got a kernel driver approved while I wasn't looking?) thus many things either work poorly or not at all. Pause-the-world GC algorithms are a good example. Coroutine implementations also have to be cooperative.
If you're curious, I believe the issue was discussed at length in the Go GitHub issues years ago. Also on the mailing lists of many other languages.