})
	if pprofPathErr != nil {
		t.Fatal(pprofPathErr)
	}
	return pprofExePath
}

var (
	pprofPathOnce sync.Once
	pprofExePath  string
	pprofPathErr  error
)

// See also runtime/pprof.cpuProfilingBroken.
func mustHaveCPUProfiling(t *testing.T) {
	switch runtime.GOOS {
	case "plan9":
		t.Skipf("skipping on %s, unimplemented", runtime.GOOS)
	case "aix":
		t.Skipf("skipping on %s, issue 45170", runtime.GOOS)

	if err != nil {
		t.Fatal(err)
	}
	for _, sample := range p.Sample {
		count := uintptr(sample.Value[0])
		f(count, sample.Location, sample.Label)
	}
	return p
}

func cpuProfilingBroken() bool {
	switch runtime.GOOS {
	case "plan9":
		// Profiling unimplemented.
		return true
	case "aix":
		// See https://golang.org/issue/45170.
		return true