tldr/pages/linux/gcov.md

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 {{[-a|--all-blocks]}} {{path/to/file.cpp}}

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

gcov {{[-b|--branch-probabilities]}} {{path/to/file.cpp}}

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

gcov {{[-c|--branch-counts]}} {{path/to/file.cpp}}

• Do not create a gcov output file:

gcov {{[-n|--no-output]}} {{path/to/file.cpp}}

• Write file level as well as function level summaries:

gcov {{[-f|--function-summaries]}} {{path/to/file.cpp}}