gcov is a tool that reports code coverage statistics when used with GCC. It shows which lines and sections of code were executed and which were not. lcov is a graphical front-end for gcov that produces HTML reports of code coverage. CppUTest is a C/C++ unit testing framework that can be configured to work with gcov to produce code coverage reports when tests are run.

1. Embedded Test Code Coverage

2. Coverage Tools
1. tcov
2. gcov
3. "C Test Coverage Tool"
4. "C++ Test Coverage Tool"
5. "Squish Coco"
6. "C++ Coverage Validator"

3. Common program

4. gcov
gcov is a tool you can use in conjunction with GCC to test code coverage in your programs.

5. How it works?

6. gcov
● how often each line of code executes
● what lines of code are actually executed
● how much computing time each section of code uses

7. How to use?

8. $ gcc -fprofile-arcs -ftest-coverage tmp.c
$ a.out
$ gcov tmp.c
File 'tmp.c'
Lines executed:90.00% of 10
Creating 'tmp.c.gcov'

9. -: 0:Source:tmp.c
-: 0:Graph:tmp.gcno
-: 0:Data:tmp.gcda
-: 0:Runs:1
-: 0:Programs:1
-: 1:#include <stdio.h>
-: 2:
-: 3:int main (void)
1: 4:{
1: 5: int i, total;
-: 6:
1: 7: total = 0;
-: 8:
11: 9: for (i = 0; i < 10; i++)
10: 10: total += i;
-: 11:
1: 12: if (total != 45)
#####: 13: printf ("Failuren");
-: 14: else
1: 15: printf ("Successn");
1: 16: return 0;
-: 17:}

10. Beyond..

11. lcov
lcov is a graphical front-end for GCC's coverage testing tool gcov.

12. CFLAGS += -fprofile-arcs -ftest-coverage
LDFLAGS += -lgcov
lcov --base-directory . --directory . --capture --output-file example.info
genhtml -o /coverage/example.info

13. lcov
result

14. cpputest framework
CppUTest is a C /C++ based unit xUnit test framework for unit testing and for test-driving
your code.

15. Basic Makefile

16. PROJECT_HOME_DIR = .
CPP_PLATFORM = Gcc
CPPUTEST_USE_EXTENSIONS = Y
CPPUTEST_WARNINGFLAGS += -Wall
CPPUTEST_WARNINGFLAGS += -Werror
CPPUTEST_WARNINGFLAGS += -Wswitch-default
CPPUTEST_WARNINGFLAGS += -Wswitch-enum
CPPUTEST_WARNINGFLAGS += -Wno-self-assign
CPPUTEST_CFLAGS += -std=c89
CPPUTEST_CFLAGS += -Wextra
CPPUTEST_CFLAGS += -pedantic
CPPUTEST_CFLAGS += -Wstrict-prototypes
Flags

17. SRC_DIRS =
src/*
TEST_SRC_DIRS =
tests
tests/util
tests/devices
tests/HomeAutomation
mocks
INCLUDE_DIRS =
$(CPPUTEST_HOME)/include/
include/*
mocks
Path

18. include $(CPPUTEST_HOME)/build/MakefileWorker.mk
Include Framwork

19. CPPUTEST_HOME/build/MakefileWorker.mk
CPPUTEST_USE_GCOV = Y
Enable gcov

20. $ cd PROJECT_HOME_DIR
$ make gcov
Get gcov output

21. lcov --base-directory . --directory objs/ -c -o temp.info
lcov --remove temp.info "/usr*" -o temp.info
rm -rf test_coverage
mkdir test_coverage
genhtml -o test_coverage temp.info
Generate lcov html