[foobarandlmj]

see: https://github.com/CoatiSoftware/Sourcetrail , even tho the project is marked archived, it's pretty solid, i personally still use a 2019 release.

i also have a self hosted instance of this : https://elixir.bootlin.com/linux/latest/source

what you asked, comes across with code auditing as well, i wasn't surprised to know security researchers use sourcetrail as well.

hope your favourite language is supported.