state, ok := o.pStates[pid]
	if !ok || state.status != go122.ProcIdle || !seq.succeeds(state.seq) || curCtx.P != NoProc {
		// We can't make an inference as to whether this is bad. We could just be seeing
		// a ProcStart on a different M before the proc's state was emitted, or before we
		// got to the right point in the trace.
		//
		// Note that we also don't advance here if we have a P and we're in a syscall.
		return curCtx, false, nil

	EvStack:             {"Stack", 5, false, []string{"id", "siz"}, nil},
	EvGomaxprocs:        {"Gomaxprocs", 5, true, []string{"procs"}, nil},
	EvProcStart:         {"ProcStart", 5, false, []string{"thread"}, nil},
	EvProcStop:          {"ProcStop", 5, false, []string{}, nil},
	EvGCStart:           {"GCStart", 5, true, []string{"seq"}, nil}, // in 1.5 format it was {}

			systemstack(func() {
				// We're stealing the P. It's treated
				// as if it temporarily stopped running. Then, start running.
				trace.ProcSteal(gp.m.p.ptr(), true)
				trace.ProcStart()
			})
		}
		gp.m.p.ptr().syscalltick++
	}
}

func exitsyscallfast_pidle() bool {
	lock(&sched.lock)
	pp, _ := pidleget(0)
	if pp != nil && sched.sysmonwait.Load() {