Lcov Diff

Prerequisites

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

Build

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 cargodocs

Tool to diff lcov files

USAGE:
lcov-diff [FLAGS] [OPTIONS] <FILE1> <FILE2>
FLAGS:
-h, --help Prints help information
-V, --version Prints version information
-v, --verbose Show Debug logging
OPTIONS:
-o, --output <PATH> output file to write (stdout if not presented)
-w, --web <web> Generate html report from output file (default name web)
ARGS:
<FILE1> <FILE2> 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.

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.

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