dst.AllocBytes = src.AllocBytes
	dst.FreeBytes = src.FreeBytes
	dst.AllocObjects = src.AllocObjects
	dst.FreeObjects = src.FreeObjects
	if raceenabled {
		racewriterangepc(unsafe.Pointer(&dst.Stack0[0]), unsafe.Sizeof(dst.Stack0), getcallerpc(), abi.FuncPCABIInternal(MemProfile))
	}
	if msanenabled {
		msanwrite(unsafe.Pointer(&dst.Stack0[0]), unsafe.Sizeof(dst.Stack0))
	}

	if !raceenabled {
		return
	}
	for i := 0; n > 0 && i < len(iovecs); i++ {
		m := int(iovecs[i].Len)
		if m > n {
			m = n
		}
		n -= m
		if m > 0 {
			raceWriteRange(unsafe.Pointer(iovecs[i].Base), m)
		}
	}
	if err == nil {
		raceAcquire(unsafe.Pointer(&ioSync))
	}
}

func Writev(fd int, iovs [][]byte) (n int, err error) {

	}
	return int(done), nil
}

func ReadFile(fd Handle, p []byte, done *uint32, overlapped *Overlapped) error {
	err := readFile(fd, p, done, overlapped)
	if raceenabled {
		if *done > 0 {
			raceWriteRange(unsafe.Pointer(&p[0]), int(*done))
		}
		raceAcquire(unsafe.Pointer(&ioSync))
	}
	return err
}

func WriteFile(fd Handle, p []byte, done *uint32, overlapped *Overlapped) error {
	if raceenabled {

		return errno
	}
	delete(m.active, p)
	return nil
}

func Read(fd int, p []byte) (n int, err error) {
	n, err = read(fd, p)
	if raceenabled {
		if n > 0 {
			raceWriteRange(unsafe.Pointer(&p[0]), n)
		}
		if err == nil {
			raceAcquire(unsafe.Pointer(&ioSync))
		}
	}
	return
}

func Write(fd int, p []byte) (n int, err error) {
	if raceenabled {