Lcov Diff

Prerequisites

• Rust, install rustup, see
• Cargo
• genhtml(install lcov via apt)

Build

bash git clone <repo> cd lcov-diff cargo build --release

See target/release If you would like to build debug version, just run: cargo build

To run tests:

cargo test --all

To install (to $HOME/.cargo/bin):

cargo install --path .

See cargo docs

Tool to diff lcov files

``` USAGE: lcov-diff [FLAGS] [OPTIONS]

FLAGS: -h, --help Prints help information -V, --version Prints version information -v, --verbose Show Debug logging

OPTIONS: -o, --output output file to write (stdout if not presented) -w, --web Generate html report from output file (default name web)

ARGS: Files to process, right now just two of them ```

The output file contains the only lines/functions/basic blocks which are presented only in the first lcov file. To generate html report for the diff use genhtml tool, see.

bash lcov-diff first.info second.info -o out.info genhtml --ignore-errors source -o web out.info

Or just run with -w/--web option to generate it automatically after getting diff file (if output is not set a tmp file will be used for it). The default output directory name is web. Also, it gets into panic if genhtml could not be invoked.

bash lcov-diff first.info second.info -w LCOV_HTML_DIR -o out.info