C++: Add PreprocBlock.qll library #15476
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MathiasVP
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Jan 31, 2024
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A few comments. I'd like to see two things fixed before we merge this:
- I think we should strip away all the
cachedand only re-introduce them if we actually end up seeing expensive re-evaluation. - I think we should fix all the implicit
thiswarnings
But other than that this LGTM!
| /** | ||
| * Gets the file this `PreprocessorBlock` is located in. | ||
| */ | ||
| cached |
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I'm slightly worried about all these cached annotations on all predicates. Other than possibly getPreprocLineFromIndex, none of these predicates look very expensive
|
Thanks for the comments. I agree and I've addressed the issues with implicit this and the change note. Still to remove the |
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The
PreprocBlock.qlllibrary offers a view of#if,#elif,#elseand similar directives (and the code they contain) as a tree. That is, there's a parent-child relationship between blocks (identified by their opening directive), as well as the ability to tell what include statements and macro definitions are contained within each block.The
preprocblock.expectedtest is a good place to start if the above isn't crystal clear.This is actually an old library, but until now it's not been available in the codeql repo.