Name:         "GoStop",
		Args:         []string{"dt", "reason_string", "stack"},
		IsTimedEvent: true,
		StackIDs:     []int{2},
		StringIDs:    []int{1},
	},
	EvGoBlock: event.Spec{
		Name:         "GoBlock",
		Args:         []string{"dt", "reason_string", "stack"},
		IsTimedEvent: true,
		StackIDs:     []int{2},
		StringIDs:    []int{1},
	},
	EvGoUnblock: event.Spec{
		Name:         "GoUnblock",

	Args []string

	// StringIDs indicates which of the arguments are string IDs.
	StringIDs []int

	// StackIDs indicates which of the arguments are stack IDs.
	//
	// The list is not sorted. The first index always refers to
	// the main stack for the current execution context of the event.
	StackIDs []int

	// StartEv indicates the event type of the corresponding "start"

	default:
		return Event{}, fmt.Errorf("unexpected event type %v", ev.Type)
	}

	if oldtrace.EventDescriptions[ev.Type].Stack {
		if stackIDs := go122.Specs()[mappedType].StackIDs; len(stackIDs) > 0 {
			mappedArgs[stackIDs[0]-1] = uint64(ev.StkID)
		}
	}

	m := NoThread
	if ev.P != -1 && ev.Type != oldtrace.EvCPUSample {
		if t, ok := it.procMs[ProcID(ev.P)]; ok {
			m = ThreadID(t)

	}
	spec := go122.Specs()[e.base.typ]
	if len(spec.StackIDs) == 0 {
		return NoStack
	}
	// The stack for the main execution context is always the
	// first stack listed in StackIDs. Subtract one from this
	// because we've peeled away the timestamp argument.
	id := stackID(e.base.args[spec.StackIDs[0]-1])
	if id == 0 {
		return NoStack
	}
	return Stack{table: e.table, id: id}
}