protected void listen(int backlog) throws java.io.IOException {
protected synchronized void listen(int backlog) throws java.io.IOException {
    protected void listen(int backlog) throws java.io.IOException {	VM_BootRecord bootRecord = VM_BootRecord.the_boot_record;	int rc = VM.sysCall2(bootRecord.sysNetSocketListenIP,			     native_fd,			     backlog);		if (rc == -1)	    throw new SocketException();    }