Since structure kinfo_file changed in sys/user.h the valgrind has problem loading correct names of files on Freebsd 10. Therefore does not work at all (it compiles and works but does not show any reasonable output).
I just tried to update vki_kinfo_file with data from sys/user.h. And when debugging it show some progress (correct file paths are shown). But then other errors occure (do not think connected with this bug), so cannot say it works ok.