These inputs were pre-generated to allow for easier testing of llvm-cov. The files used to test the gcov compatible code coverage tool were generated using the following method: test.gcno and test.gcda were create by running clang: clang++ -g -ftest-coverage -fprofile-arcs test.cpp test.cpp.gcov was created by running gcov 4.2.1: gcov test.cpp The 'covmapping' files that are used to test llvm-cov contain raw sections with the coverage mapping data generated by the compiler and linker. They are created by running clang and llvm-cov: clang++ -fprofile-instr-generate -fcoverage-mapping -o test test.cpp llvm-cov convert-for-testing -o test.covmapping test The 'profdata' files were generated by running an instrumented version of the program and merging the raw profile data using llvm-profdata. ./test llvm-profdata merge -o test.profdata default.profraw