-fprofile-list flag

I am using Clang to compile my Gem5 simulator program and my problem is that I am trying to instrument only some specific files but I am not succeeding. The command I am using to compile the program is the following:

clang++ -O2 -fprofile-instr-generate -fcoverage-mapping -fprofile-list=fun.list *.cc

being the content of fun.list:

The debugfaults.hh file is the only one I want to instrument and get coverage information but all the files are instrumented though

I have also tried with the other version of the fun.lis file:

And the same thing happens, any idea how to get only instrument that file?