Code to circumvent Go's memory safety (read/write arbitrary addresses without unsafe)

[BUGFIX 66]

The code from Russ Cox's article (https://research.swtch.com/gorace) no longer works with the modern Go compiler, because the compiler does a better job of removing redundant operations.

But here is minimal (?) working code to read/write bytes at arbitrary addresses without importing unsafe:

https://bugfix-66.com/142fe84d7400a941ca0a1122096aaa300347e9180f567e373f21a1f2d0d22617

With today's Go runtime, if GOMAXPROCS equals 1, does that prevent this circumvention?