Noticed while working on #2693 - the golang runtime opens and reads /proc/self/maps, but because we open the file from shadow and don't otherwise remap the path name, this opens shadow's maps file. In addition to possibly breaking whatever the runtime is trying to do with those maps, the result is non-deterministic since ASLR isn't disabled for the shadow process itself (and changes dynamically).

I think in our file path handling we want to replace /proc/self/* (and /proc/<virtual-pid>/*) with /proc/<native-pid>/*