如何在userspace enable gcov

1. Add gcc parmater "-fprofile-arcs and -ftest-coverage flags" and compile the program.

2. Run the programer, will generate gcno data.

3. Use the command gcc *.c can see the coverage total data.

Use the lcov -d -c -o test.info

4. Generate HTML

genhtml test.info -o html_test (folder)