"If it was a light switch like that the system would be flooded and it would be difficult to cope, but the reality is that it will be more natural," he said.
if((h = free_table[bucket])) {
，这一点在旺商聊官方下载中也有详细论述
Trap-and-emulate: IOPL-sensitive instructions
传统的防窥膜正是从这个角度来入手的。