2015-04-19 22:32:01 +00:00
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You need to change only one single line in such a C function. You have to know:
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\begin{itemizep}
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\item does the order of function calls matter?
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\item how does the change effect the memory management? Do we have memory leaks? Do we access invalid memory?
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\item does it change the state of static or global variables?
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2015-04-20 13:08:38 +00:00
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\item does it change the state of out-parameters?
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2015-04-19 22:32:01 +00:00
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\item if it changes any of those states, is the function still correct?
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\item what happens if the program flow reaches this code-path with variable X in that particular state, while variable Z is NULL, and...
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\item did you just nuke a small former Soviet state?
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\end{itemizep}
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\vspace{\baselineskip}
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\slidep
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Conclusion: you really need to understand the complete environment of that line/function.
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