// Functions exported from Go.
extern void GoSleep();

struct cgoContextArg {
	uintptr_t context;
};

void gprofCgoContext(void *arg) {
	((struct cgoContextArg*)arg)->context = 1;
}

void gprofCgoTraceback(void *arg) {
	// spend some time here so the P is more likely to be retaken.
	volatile int i;
	for (i = 0; i < 123456789; i++);
}

void CallGoSleep() {
	GoSleep();

	go C.CallGoSleep()
	go C.CallGoSleep()
	go C.CallGoSleep()
	time.Sleep(1 * time.Second)

	prof := pprof.Lookup("goroutine")
	prof.WriteTo(io.Discard, 1)
	fmt.Println("OK")
}

//export GoSleep
func GoSleep() {
	time.Sleep(time.Hour)