lcov

processes gcov code coverage data

TLDR

Capture coverage data

$ lcov --capture --directory [.] --output-file [coverage.info]

Generate HTML report

$ genhtml [coverage.info] --output-directory [coverage/]

Remove patterns

$ lcov --remove [coverage.info] '*/test/*' -o [filtered.info]

Extract specific files

$ lcov --extract [coverage.info] '*/src/*' -o [src.info]

Combine traces

$ lcov --add-tracefile [a.info] --add-tracefile [b.info] -o [combined.info]

Zero counters

$ lcov --zerocounters --directory [.]

SYNOPSIS

lcov [options]

DESCRIPTION

lcov processes gcov code coverage data. It collects and manipulates coverage information.The tool generates coverage reports from gcc/gcov data. Use genhtml to create HTML reports.

PARAMETERS

--capture

Capture coverage data.

--directory DIR

Source directory.

--output-file FILE

Output trace file.

--remove FILE PATTERN

Remove matching files.

--extract FILE PATTERN

Extract matching files.

--add-tracefile FILE

Add trace file.

--help

Display help information.

INSTALL

sudo dnf install lcov

sudo pacman -S lcov

sudo apk add lcov

sudo zypper install lcov

brew install lcov

nix profile install nixpkgs#lcov

CAVEATS

Requires gcc/gcov. C/C++ focused. Part of LCOV package.

HISTORY

lcov was created for the Linux Test Project to provide graphical code coverage analysis.