Within the current commercial system achitecture and software ecosystem, code reuse techniques, such as ROP (return-oriented programming), are widely adopted to exploit memory vulnerabilities. Driven by the serve situation of cyberspace security, academical and industrial communities have carried out a great amount of research on binary code reuse from both defensive and offsensive perspevtives. This paper discusses the essence and basics of binary code reuse, along with an analysis of its technique roadmap and typical attack vectors. Corresponding defences and mitigations based on control flow integrity and memory randomization are analyzed as well. Dissections on CET (control flow enforcement technology) and CFG (control flow guard), two latest industrial techniques for binary code reuse mitigation, are presented. The future of binary code reuse, including protential attack vectors and possible mitigation strategies, is also discussed at the end of this paper.