praphael
commented
3 years ago You can try running lcov from within the build directory. However in my experience the reports it generates are poor.
I would also recommend building with the cmake flag CMAKE_BUILD_TYPE="RelWithDebInfo'. Code coverage with release modes does not generate good results, and full debug mode tends to cause crashes.
Code coverage is actually a non-trivial problem. The major hurdle being that the tools were designed for in-source tree builds, but cmake builds outside of the source tree. Also, with C++ you also have the question of how to handle header files, which can be included 100s of times in large projects. When you run gcov on a given GCDA/GCNO/CPP pair, it will generate a GCOV not just for the source file, but for all headers that source file includes including system libraries. You could just ignore them (and this makes sense for system libraries), but a large portion of EOSIO code is contained in non-system header files. And you have to be careful you don't overwrite existing files which gcov does by default.
Also to get more extensive coverage you can try running our ctest suites.. I would not recommend running the full suite, but the unlabelled tests will maybe take 15 minutes.
renardbebe
EOS: 2.1.0 Ubuntu: 20.04 Compiler: llvm-7 clang-7 clang++-7 llvm-cov-7
I have set the
ENABLE_COVERAGE_TESTING=truewhile compiling, and have generated a list of.gcnofiles.Then I use the following command to start the node:
When I use
Ctrl+Cto stop the node, I found that only few files have generated the corresponding.gcdafiles:I found that there is no one-to-one correspondence between
.gcnofile and.gcdafile. For example,./programs/nodeos/CMakeFiles/nodeos.dir/main.cpp.gcnodoesn't generate the corresponding.gcdafile.When I use the command in
tools/llvm-gcov.shto run, it will generate some.gcovfiles, but the coverage of some executed file is all 0.00% (Also, these files doesn't generate.gcdafile after running). I'm sure the code innodeos/main.cpphas been executed. Such as:So, is the way I am running is correct (such as the way to stop the node)? What is the sequence of instructions that can generate code coverage correctly?
If anyone can help me, I would be very grateful! Thanks a lot.