July 2009
Intermediate to advanced
544 pages
11h 24m
English
Content preview from Why Programs Fail, 2nd Edition
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CHAPTER 8 Observing Facts
Although deduction techniques do not take concrete runs into account, observation determines facts about what has happened in a concrete run. In this chapter, we look under the hood of the actual program execution and introduce widespread techniques for examining program executions and program states. These techniques include classical logging, interactive debuggers, and postmortem debugging, as well as eye-opening visualization and summarization techniques.
8.1 OBSERVING STATE
Deduction alone, as discussed in Chapter 7 is good for telling what might happen. To find out what is actually happening in a concrete failing run, though, we cannot rely on deduction alone. We must take a look at the actual facts—that is, ...
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