//
			// 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";

	hz atomic.Int32
}

func _System()                    { _System() }
func _ExternalCode()              { _ExternalCode() }
func _LostExternalCode()          { _LostExternalCode() }
func _GC()                        { _GC() }
func _LostSIGPROFDuringAtomic64() { _LostSIGPROFDuringAtomic64() }
func _LostContendedRuntimeLock()  { _LostContendedRuntimeLock() }
func _VDSO()                      { _VDSO() }

			// exists to record a PC without a traceback. Those are okay.
			if len(stk) == 2 {
				name := stk[1].Line[0].Function.Name
				if name == "runtime._System" || name == "runtime._ExternalCode" || name == "runtime._GC" {
					return
				}
			}

			// An entry with just one frame is OK too:
			// it knew to stop at gogo.
			if len(stk) == 1 {
				return
			}

			// Otherwise, should not see gogo.

345?V\214\031\230\033\316\331?\340\274\362\213\213\021\251?\354\313\027n\232L\306?X\336{\222d\276\311?\267\331\257U=\246\340?*\031\371\317\0011\332?\310~\216\212e\205\260?V\326\330\207\034\211\333?\366\033\304\367io\335?\236\264m`\014\007\332?\266]_Gc\350\353?L\373sg\244\230\303?\372\225\307\220\305v\332?\014\364m\017j\313\301?H\313\304Cp\343\326?\321\237d[\215\t\350?\255|\276:\202\204\354?\262V[\246\354\352\332?\371\037~\317u\037\343?x\331\244^e\217\277?\2668\3250\347W\342?<\241#u/\314\354?\333...