the branch coverage is strange.

[yangsee0]

Test: gcc version 8.5.0 20210514 (Red Hat 8.5.0-15) (GCC)

I tested the gcov version differently on the same server, but the branch coverage is different. What's wrong with it? Please give your opinion. Thank you.

lcov 1.6.20230126

lcov 2.0

[yangsee0]

g++ -o sol -fprofile-arcs -ftest-coverage main.cpp sol.cpp ./sol gcov -abcf main.cpp sol.cpp lcov --rc lcov_branch_coverage=1 --capture --directory ./ --output-file sol.info genhtml --branch-coverage ./sol.info --output-directory ./cov

[henry2cox]

Exception handlers. Did you happen to compile and run your lcov 1.6 test with gcc (C compiler) and the 2.0 test with g++ (C++ compiler)? If so: that would explain the difference. For lcov 2.0, you can use filtering to remove some of the bogus branches. $ man genhtml <- then search for "filter" "branch" and "exception"

[yangsee0]

Confirmation is late. We have confirmed that it has been resolved by adding the --filter branch option you informed us. Thank you for your answer.

before : genhtml --branch-coverage ./sol.info --output-directory ./cov
after : genhtml --branch-coverage --filter branch ./sol.info --output-directory ./cov

[GuWei007]

“--filter branch” works for me， thanks very much