Quickstart replication problem

[poyrazogluyigit]

Hello,

I've been following the quickstart. However, I've encountered a discrepancy between the documented behavior and the my execution. More specifically, attempting to invoke cpg.call.argument.code("stderr") returns an empty iterator. Running cpg.call("fprintf").argument.code.l shows that the stderr argument is registered as <unknown> stderr. I'm not sure if this is a bug or a result of some faulty installation, so any help is appreciated.

[max-leuthaeuser]

Thanks for reporting this. This is most likely not a faulty installation, but rather due to missing include resolution when generating the CPG. In that case, identifiers such as stderr may remain unresolved and show up as <unknown> stderr. The docs are simply a bit outdated there.

Could you try regenerating the CPG with c2cpg and either enable automatic include discovery

c2cpg.sh <input-dir> --output cpg.bin.zip --with-include-auto-discovery

or pass an explicit include directory, e.g.

c2cpg.sh <input-dir> --output cpg.bin.zip --include <path-to-system-headers>

and then import the CPG into your Joern shell and retry?