Next: Trouble, Previous: Compatibility, Up: Top 9 gcov—a Test Coverage Program gcov is a tool you can use in conjunction with GCC to test code coverage in your programs. Gcov Intro: Introduction to gcov. Invoking Gcov: How to use gcov. Gcov and Optimization: Using gcov with GCC optimization. Gcov Data Files: The files used by gcov. Cross-profiling: Data file relocation.