accessing command line options

Clang Frontend
1

Hi list,

How can I get command line options, especially “-o” of scan-build (output directory), in a checker function such as “checkEndAnalysis”?

Thanks,
Kihong

2

Hi!

You may use the AnalyzerOptions class to retrieve analyzer specific command line options, and you can get one easily from CheckerContext. For the output directory, FrontendOptions should be used, but I don’t think you can get your hands on it from a checker callback. What would you like to achieve?

Cheers,
Kristóf

3

Thanks a lot.

I want to keep some additional information and intermediate results during analysis and dump it in the given output directory. What would be the simplest way?

-Kihong

      1. 오전 8:59, Kristóf Umann <dkszelethus@gmail.com> 작성:
4

Hmm. Yea, I don’t think you can do that now. It might be possible somehow, I just don’t know how, and I doubt that there is a way. The best course of action would be to add a checker option.

  1. Add a brief documentation about that flag in the file’s headings (below the licence thingie)
  2. Add a new string field to your checker class. Initialize it in the checker registry function (registerYourChecker) by calling AnalyzerOptions::getCheckerStringOption().
  3. You may configure your checker on the command line by appending this to the analyzer invocation: -analyzer-config package.subpackage.YourChecker:YourConfig=“/some/output/location”

Mind you, there are around 10 patches on review that will overhaul the checker option interface, so you might need to rebase sometime soon on top of it :slight_smile:

Thanks for reaching out, I might take a look at this later! There are some legitimate cases where accessing the output dir would be neat, for example, we could get rid of the “ctu-dir” option entirely.

Cheers,
Husi

5

Meant to say “Cheers, Kristóf”.