// public source code for these routines, so it is unclear exactly what
// the problem is. An Apple engineer suggests using xpc_date_create_from_current,
// which empirically does fix the problem.
//
// So osinit_hack_trampoline (in sys_darwin_$GOARCH.s) calls
// notify_is_valid_token(0) and xpc_date_create_from_current(), which makes the
// fork+exec hangs stop happening. If Apple fixes the libc bug in