Hooking Qt Signals/Slots

[wysota]

If you dynamically link your program, you can easilly inject another library that overrides some functions and thus you gain complete access to your program from an "external" source.

Edit: how this is done on Windows, I don't know. On linux you use LD_PRELOAD to load your custom library first.

You can always craft a custom QtCore library which will dump something to the console every time QObject::connect() and QMetaObject::metacall() are called. You can even make it read some configuration from an external source to dump only those things you are interested in.