//
			// TODO: Make the symbolization done by the execution tracer and CPU
			// profiler match up even in these harder cases. See #53378.
			switch leaf {
			case "runtime._System", "runtime._GC", "runtime._ExternalCode", "runtime._VDSO":
				continue
			}
			stack := strings.Join(fns, "|")
			samples := int(s.Value[0])
			pprofStacks[stack] += samples
		}
	}
	for stack, samples := range pprofStacks {

func (m *Metrics) Report(w io.Writer) {
	if m == nil {
		return
	}

	m.closeMark()

	gcString := ""
	if m.gc == GC {
		gcString = "_GC"
	}

	var totTime time.Duration
	for _, curMark := range m.marks {
		dur := curMark.endT.Sub(curMark.startT)
		totTime += dur
		fmt.Fprintf(w, "%s 1 %d ns/op", makeBenchString(curMark.name+gcString), dur.Nanoseconds())

				echo "$mksyscall -tags $GOOS,$GOARCH $syscall_goos $GOOSARCH_in && gofmt -w zsyscall_$GOOSARCH.go && gofmt -w zsyscall_"$GOOSARCH"_gccgo.go && gofmt -w zsyscall_"$GOOSARCH"_gc.go " ;
			elif [ "$GOOS" == "illumos" ]; then
			        # illumos code generation requires a --illumos switch
			        echo "$mksyscall -illumos -tags illumos,$GOARCH syscall_illumos.go |gofmt > zsyscall_illumos_$GOARCH.go";