// world and invokes the syscall on each OS thread. Once this function returns,
// all threads are in sync.
//
//go:uintptrescapes
func runtime_doAllThreadsSyscall(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)

// AllThreadsSyscall performs a syscall on each OS thread of the Go
// runtime. It first invokes the syscall on one thread. Should that