摘要：Emery D. Berger, University of Massachusetts, Amherst Like death and taxes, buggy code is an unfortunate fact of life. Nearly every program ships with known bugs, and probably all of them end up with bugs that are discovered only post-deployment. There are many reasons for this sad state of affairs. One problem is that many applications are written in memory-unsafe languages. Variants of C, including C++ and Objective-C, are especially vulnerable to memory errors such as buffer overflows and dangling pointers (use-after-free bugs). Two of these are in the SANS Top 25 list: buffer copy without checking size of input (http://cwe.mitre.org/top25/index.html#CWE-120) and incorrect calculation of buffer size (http://cwe.mitre.org/top25/index.html#CWE-131); see also heap-based buffer overflow (http://cwe.mitre.org/data/definitions/122.html) and use after free (http://cwe.mitre.org/data/definitions/416.html).
