In this talk, we will present a starting project at OCamlPro, the development of a debugging framework for OCaml native-code applications, based on the LLDB Debugger, a debugger built on top of the LLVM framework. We implemented a complete binding of LLDB C++ API for OCaml, and then used it to build several tools, one " generic " debugger, and two small utilities to monitor the memory behavior of OCaml applications.