default:
			logAndDie(fmt.Errorf("unknown pprof type %s\n", *pprofFlag))
		}
		records, err := f(&http.Request{})
		if err != nil {
			logAndDie(fmt.Errorf("failed to generate pprof: %v\n", err))
		}
		if err := traceviewer.BuildProfile(records).Write(os.Stdout); err != nil {
			logAndDie(fmt.Errorf("failed to generate pprof: %v\n", err))
		}
		logAndDie(nil)
	}

	// Debug flags.
	switch *debugFlag {
	case 1: