cmdline[2] += " " + strings.TrimPrefix(flag, "--gcflags=")
				case flag == "-gcflags", flag == "--gcflags":
					i++
					if i < len(flags) {
						cmdline[2] += " " + flags[i]
					}
				default:
					cmdline = append(cmdline, flag)
				}
			}

			cmdline = append(cmdline, long)
			cmd := exec.Command(goTool, cmdline...)
			cmd.Env = append(os.Environ(), env.Environ()...)

// The command will be run in dir, and Stdout and Stderr will go to os.Stdout
// and os.Stderr.
func (t *tester) dirCmd(dir string, cmdline ...interface{}) *exec.Cmd {
	bin, args := flattenCmdline(cmdline)
	cmd := exec.Command(bin, args...)
	if filepath.IsAbs(dir) {
		setDir(cmd, dir)
	} else {
		setDir(cmd, filepath.Join(goroot, dir))
	}
	cmd.Stdout = os.Stdout

# running. A standard `Restart-Service` may fail because
# the process is sometimes unstoppable, so this function works around it
# by killing the processes.
function Restart-LogService([string]$service, [string]$cmdline) {
  Stop-Service -NoWait -ErrorAction Ignore $service

  # Wait (if necessary) for service to stop.
  $timeout = 10
  $stopped = (Get-service $service).Status -eq 'Stopped'

	}
	endpoints := mustGetNewEndpoints(poolIdx, drivesPerSet, args...)
	return []PoolEndpoints{{
		SetCount:     setCount,
		DrivesPerSet: drivesPerSet,
		Endpoints:    endpoints,
		CmdLine:      strings.Join(args, " "),
	}}
}

func mustGetNewEndpoints(poolIdx int, drivesPerSet int, args ...string) (endpoints Endpoints) {
	endpoints, err := NewEndpoints(args...)
	if err != nil {