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)