好长一句话

读CS:APP，见一段落近乎一句呵成，虽不费解，仍觉恢宏，遂摘录此长句： 

Buffer overflow attacks have become so pervasive and have caused so many problems with computer systems that modern compilers and operating systems have implemented mechanisms to make it more difficult to mount these attacks and to limit the ways by which an intruder can seize control of a system via a buffer overflow attack. 

（本想摘到微博上，无耐字数限制塞不进去，只好放到博客里。）