go 源码阅读
https://juejin.im/post/5d661014f265da03f04cdddc
https://zhuanlan.zhihu.com/p/59087366
https://reading.developerlearning.cn/reading/
https://docs.kilvn.com/go-internals/ref2.html
https://tiancaiamao.gitbooks.io/go-internals/content/zh/01.3.html