- Shotgun debugging
Shotgun debugging is a process of making relatively undirected changes to software in the hope that a bug will be perturbed out of existence. This almost never works except in very simple programs, or when used as an attempt to work around
programming languagefeatures that one may be using improperly; it usually introduces more bugs. These undirected, random changes can however cause more symptoms to occur, which assists in locating (and therefore fixing) problems.
Shotgun debugging can occur when working with
multi-threadedapplications. Attempting to debug a race conditionby adding debugging code to the application is likely to change the speed of one thread in relation to another and could cause the problem to disappear. Although apparently a solution to the problem, it is a fix by pure chance and anything else that changes the behaviour of the threads could cause it to resurface — for example on a computer with a different scheduler. Code added to any part of the program could easily revert the effect of the "fix".
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