uftrace code coverage

This document is written by Minchul Kang

lcov is a code coverage tool for linux.

1. Download lcov

$ sudo apt-get install lcov

or

$ git clone https://github.com/linux-test-project/lcov.git

2. Build lcov

$ make clean
$ make COVERAGE=1

if you want to reset coverage, you can use command below:

$ make reset-coverage

3. compile test code with -pgoption

$ gcc -pg -o t-abc tests/s-abc.c

4. record the object data with uftrace

record t-abc file with uftrace.

$ ./uftrace record --libmcount-path=. t-abc

Note that as we want to load necessary internal libraries from this path for testing purpose, -L option is given.

5. run script for lcov

Command below will generate coverage.html file.

./misc/run-lcov.sh

6. Check the generated html

$ cd coverage.html

7. Run a web server

In this case, we used SimpleHTTPServer as a simple web server with port number 18080.

$ python -m SimpleHTTPServer 18080

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you can get some data sample in link down below:
open index.html in coverage.html.zip