Valgrind and Fedora debuginfo: best GUI

I have to debug certain BOINC Manager problems (C++ language), and
instead of importing and building the whole source tree in a project
in a SDK like Eclipse, I want to simply use the debuginfos already
available in Fedora repository.
Concerning GDB usage I can do that with QtCreator. It attaches to and
external running program, and I can easly see the sources.
This seems to not happen with Valgrind on QtCreator: I can manage to
start Valgrind and BOINC Manager, but I don't see anything.
What do you suggest me to do to achieve using Valgrind in a GUI in a quick way?

Thank you