os.Process.sigMu (field)

5 uses

	os (current package)
		exec.go#L91: 	sigMu sync.RWMutex // avoid race between wait and signal
		exec_unix.go#L59: 		p.sigMu.Lock()
		exec_unix.go#L60: 		p.sigMu.Unlock()
		exec_unix.go#L108: 	p.sigMu.RLock()
		exec_unix.go#L109: 	defer p.sigMu.RUnlock()