gcov

Code coverage analysis and profiling tool that discovers untested parts of a program. Also displays a copy of source code annotated with execution frequencies of code segments. More information: https://gcc.gnu.org/onlinedocs/gcc/Invoking-Gcov.html.

• Generate a coverage report named file.cpp.gcov:

gcov path/to/file.cpp

• Write individual execution counts for every basic block:

gcov --all-blocks path/to/file.cpp

• Write branch frequencies to the output file and print summary information to stdout as a percentage:

gcov --branch-probabilities path/to/file.cpp

• Write branch frequencies as the number of branches taken, rather than the percentage:

gcov --branch-counts path/to/file.cpp

• Do not create a gcov output file:

gcov --no-output path/to/file.cpp

• Write file level as well as function level summaries:

gcov --function-summaries path/to/file.cpp