In looking at the output of 'lsof' for a process, I saw a couple of attached /proc entries. Looking at each, provides an interesting view into the process.
$ cat /proc/<pid>/statm 10593951 17514 5924 24288 0 82658 0 $ cat /proc/<pid>/status Name: code Umask: 0022 State: S (sleeping) Tgid: 227783 Ngid: 0 Pid: 227783 PPid: 227577 TracerPid: 0 Uid: 1000 1000 1000 1000 Gid: 1000 1000 1000 1000 ... more stuff ...