I had never heard about systemtap, but it sounds magical, and extremely useful. I would actually need this in my day job, but for a regular but huge embedded C+

I had never heard about systemtap, but it sounds magical, and extremely useful. I would actually need this in my day job, but for a regular but huge embedded C++ application. I have no idea how to "hot-patch" a C++ application though, are there libraries for this?