Code Coverage for Embedded Target with Eclipse, gcc and gcov

Requirement

python 3

https://www.python.org/downloads/

gcovr

Gcovr provides a utility for managing the use of the GNU gcov utility and generating summarized code coverage results. This command is inspired by the Python coverage.py package, which provides a similar utility for Python.

Gcovr is available as a Python package that can be installed via pip.

Install newest stable gcovr release from PyPI:

pip install gcovr

Install development version from GitHub:

pip install git+https://github.com/gcovr/gcovr.git

See: https://gcovr.com/en/stable/index.html

Eclipse

Source tree

report
|__coverage/index.html -- Example coverage report
...
sample
|__test.cpp     -- example code
test.bat        -- script build and run example 
gen-cov-rp.py  -- Tool generate coverage report from coverage data
coverage
|__ coverage.c
|__ coverage.h
|__ gcov-port.h -- Porting some function for specific platform
|__ gcov.h

Run example:

Delete folder report

Run command:

.\test.bat

Report file: report\coverage\index.html

Try with your project

Build project

• Add coverage/, gcov.h to your project
• Add define CONFIG_COVERAGE

-DCONFIG_COVERAGE

• Call gcov_coverage_dump if you want to retrieves gcov coverage data and sends it over the given interface.

• Compile the code for which you want to generate the coverage with these options:

CFLAGS: -fprofile-arcs -ftest-coverage

LFLAGS: -lgcov --coverage

Collect coverage data

Run excutable file. Coverage data will be display on console. Copy them to handler.log file and save in report folder.

This is example coverage data:

GCOV_COVERAGE_DUMP_START
*C:\Users\linh9\Documents\source\ctest\main.c.gcda< 61 64 63 67 2a 32 31 42 5a 5a ...
*C:\Users\linh9\Documents\source\ctest\mytests.c.gcda< 61 64 00 00 00 01 03 00 00 00 8c 1a 70 33 a0 26 3e cb da ...
*C:\Users\linh9\Documents\source\ctest\coverage.c.gcda< 61 64 e9 ac 00 00 00 01 03 00 00 00 b9 31 42 6f d1 fc ...
GCOV_COVERAGE_DUMP_END

Generate coverage report

python gen-cov-rp.py <gcov_cmd> <project_dir> <report_folder>

Limitation

Missing data when alocate dynamicaly gcov data buffer