if err := trace.Start(file); err != nil {
		log.Fatal(err)
	}
	defer trace.Stop()

	goCalledFromGo()
	<-goCalledFromCThreadChan

	fmt.Printf("trace path:%s", file.Name())
}

// goCalledFromGo calls cCalledFromGo which calls back into goCalledFromC and
// goCalledFromCThread.
func goCalledFromGo() {
	C.cCalledFromGo()
}

//export goCalledFromC
func goCalledFromC() {