The Sentry intercepts the untrusted code’s syscalls and handles them in user-space. It reimplements around 200 Linux syscalls in Go, which is enough to run most applications. When the Sentry actually needs to interact with the host to read a file, it makes its own highly restricted set of roughly 70 host syscalls. This is not just a smaller filter on the same surface; it is a completely different surface. The failure mode changes significantly. An attacker must first find a bug in gVisor’s Go implementation of a syscall to compromise the Sentry process, and then find a way to escape from the Sentry to the host using only those limited host syscalls.
This is the same idea behind binary search. In a sorted array, you compare against the middle element and eliminate half the remaining candidates. In a quadtree, you choose one of four quadrants and ignore the other three regions. Each level narrows the search space by a factor of four instead of two.
，这一点在服务器推荐中也有详细论述
100x speedup is achieved by comparing HH with bidirectional A*.
Раскрыты подробности похищения ребенка в Смоленске09:27，推荐阅读Line官方版本下载获取更多信息
For urgent, non-life-threatening issues, the advice is to use the NHS 111 website or to call the helpline. GP surgeries will be open as normal.，推荐阅读爱思助手下载最新版本获取更多信息
Scotland, Wales and Northern Ireland are not affected by this planned walk-out.