Static analysis suites are well suited to this. Things like Understand[1], NDepend[2], and Source Insight[3]. 1: https://www.scitools.com/spaghetti-code 2:

Static analysis suites are well suited to this. Things like Understand[1], NDepend[2], and Source Insight[3]. 1: https://www.scitools.com/spaghetti-code 2: https://blog.ndepend.com/visualize-code-with-software-architecture-diagrams/ 3: https://www.sourceinsight.com/#call-graphs