In all but the last example these are the programs themselves having multiple names. There are literally multiple names on the file system that point to the same executable. So `ping`, `ping4`, and `ping6` are all the same program but it checks $0 to see which name it was invoked as in order to change it’s own behavior.

This is entirely different than when DirectX behaves differently for a program named foo.exe and another one called bar.exe.

AppArmor (and for that matter SELinux) are a different thing yet again. Here the goal is not to fix bugs or incompatibilities, but to add extra security. Similar perhaps, but not nearly as intrusive. Neither involve runtime patching, which is the most salient feature of this crash report.