// transition.
			beforeState = ProcIdle
		}
		s = procStateTransition(ProcID(e.base.args[0]), beforeState, ProcIdle)
	case go122.EvProcStatus:
		// N.B. ordering.advance populates e.base.extra.
		s = procStateTransition(ProcID(e.base.args[0]), ProcState(e.base.extra(version.Go122)[0]), go122ProcStatus2ProcState[e.base.args[1]])
	case go122.EvGoCreate, go122.EvGoCreateBlocked:

	b0 := g.Batch(trace.ThreadID(0), 0)
	b0.Event("ProcStatus", trace.ProcID(1), go122.ProcIdle)
	b0.Event("ProcStatus", trace.ProcID(0), go122.ProcRunning)
	b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning)
	b0.Event("GoSyscallBegin", testgen.Seq(1), testgen.NoStack)
	b0.Event("ProcStart", trace.ProcID(1), testgen.Seq(1))
	b0.Event("GoSyscallEndBlocked")

	// A running goroutine steals proc 0.

type resource interface {
	trace.GoID | trace.ProcID | trace.ThreadID
}

// noResource indicates the lack of a resource.
const noResource = -1

// gState represents the trace viewer state of a goroutine in a trace.
//
// The type parameter on this type is the resource which is used to construct
// a timeline of events. e.g. R=ProcID for a proc-oriented view, R=GoID for
// a goroutine-oriented view, etc.

                            selectors.put(id, selector);
                            break;
                        case DEPENDENCY:
                            Long fromId = decoder.readSmallLong();
                            int size = decoder.readSmallInt();
                            if (size > 0) {

		// TODO: fail and return here once alpha only tests can set the feature flags for a plugin correctly
	}

	// Skip appending the in-tree plugin to the list of plugins to be probed/initialized
	// if the plugin unregister feature flag is set
	if featureGate.Enabled(pluginInfo.pluginUnregisterFeature) {

type pState struct {
	id     ProcID
	status go122.ProcStatus
	seq    seqCounter

	// rangeState is the state of special time ranges bound to this proc.
	rangeState
}

// mState is the state of a thread at a point in the trace.
type mState struct {
	g GoID   // Goroutine bound to this M. (The goroutine's state is Executing.)
	p ProcID // Proc bound to this M. (The proc's state is Executing.)

	// on that P.
	b0 := g.Batch(trace.ThreadID(0), 0)
	b0.Event("ProcStatus", trace.ProcID(0), go122.ProcRunning)
	b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning)
	b0.Event("GoSyscallBegin", testgen.Seq(1), testgen.NoStack)
	b0.Event("ProcSteal", trace.ProcID(0), testgen.Seq(2), trace.ThreadID(0))
	b0.Event("ProcStart", trace.ProcID(0), testgen.Seq(3))
	b0.Event("GoSyscallEndBlocked")

	if gp.lockedm == 0 {
		return nil, plainError("goroutine not locked to thread")
	}

	tid := int(gp.lockedm.ptr().procid)
	if tid == 0 {
		return nil, plainError("missing tid")
	}

	f := efaceOf(&fn)
	if f._type == nil || f._type.Kind_&abi.KindMask != abi.Func {
		return nil, plainError("fn must be a function")
	}

			ctx: schedCtx{
				G: GoID(ev.G),
				P: ProcID(ev.P),
				M: it.procMs[ProcID(ev.P)],
			},
			table: it.evt,
			base: baseEvent{
				typ:  go122.EvGoLabel,
				time: Time(ev.Ts),
				args: timedEventArgs{ev.Args[2]},
			},
		}}
		return Event{
			ctx: schedCtx{
				G: GoID(ev.G),
				P: ProcID(ev.P),
				M: it.procMs[ProcID(ev.P)],
			},
			table: it.evt,
			base: baseEvent{

		klog.FlushAndExit(klog.ExitFlushTimeout, 1)
		// TODO: fail and return here once alpha only tests can set the feature flags for a plugin correctly
	}

	// Skip appending the in-tree plugin to the list of plugins to be probed/initialized
	// if the plugin unregister feature flag is set
	if featureGate.Enabled(pluginInfo.pluginUnregisterFeature) {