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Writing reliable software is hard. For safety–critical code, the use of strong static source code analyzers has become an essential part of the development process. The best analyzers are based on solid theory and maintained by large teams of highly skilled developers. The tools can patiently trace through complex execution paths to reveal a range of subtle bugs, although, of course, only the types of bugs the tools have been trained on. Currently, to resolve simple queries fast, the most readily available methods include the old Unix pattern matching tools grep and awk. They are fast and robust, but they are fundamentally text processing tools, not program analysis tools, and that means it is much harder to use them to identify troublesome coding patterns.
