[$] Some advanced BCC topics

The BPF virtual machine is working its way into an increasing number ofkernel subsystems. The previous article inthis series introduced the BPF Compiler Collection (BCC), whichprovides a set of tools for working with BPF. But there is more to BCCthan a set of administrative tools; it also provides a developmentenvironment for those wanting to create their own BPF-based utilities.Read on for an exploration of that environment and how it can be used tocreate programs and attach them to tracepoints.