func makeComputePprofFunc(state trace.GoState, trackReason func(string) bool) computePprofFunc {
	return func(gToIntervals map[trace.GoID][]interval, events []trace.Event) ([]traceviewer.ProfileRecord, error) {
		stacks := newStackMap()
		tracking := make(map[trace.GoID]*trace.Event)
		for i := range events {
			ev := &events[i]

			// Filter out any non-state-transitions and events without stacks.