兩個 process 互相 kill 的可能性

Twitter 上看到的奇怪實驗 XD

在 Mac OS X 與 Ubuntu 上都有機會發生：

a student asked if two processes can kill each other by sending simultaneous signals; this program does that about 10% of the time on my Mac pic.twitter.com/neTQN4wj8B

— John Regehr (@johnregehr) October 25, 2017

here's the magic number for my Ubuntu 16.04 box, they kill each other ~20% of the time pic.twitter.com/UvSMyDYT6S

— John Regehr (@johnregehr) October 26, 2017