Thanks @Andre and @Xi.I could reproduce the 100% conditional coverage when disabling exceptions. (as assumed)
The only problem is: The real production code is actually using exceptions. And with "-fno-exceptions" gcc refuses to compile code which uses exceptions.
Therefore we probably have to deal with the "low" branch coverage and simply redefine our scale of a adequate coverage. ;)
Best regards Sven Am 06.02.2017 um 23:58 schrieb andre maute:
On 02/02/2017 02:59 PM, Sven Eppler wrote:Hello, we are using GCOV/LCOV to produce test coverage for our projects. Recently we tried to enable branch-coverage additionally. But it looks like, this just doesn't yield the results we expected from a high level developer view. I created a small test project to show the problem: https://github.com/ghandmann/lcov-branch-coverage-weirdness Currently we use Ubuntu 16.04. with: - gcc v5.4 - lcov & genhtml v1.12 Our production code is build with c++11 enabled. The minimal example isn't build with c++11 enabled, but as we experimented a bit with all different options (c++ standard, optimization, -fno-exceptions) we didn't came up with a passable result.Experimenting on my Fedora with lcov 1.12 (not 1.13) and a fedora repo gcc-6.3.1 for fc24 $ g++ -vUsing built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-redhat-linux/6.3.1/lto-wrapper Target: x86_64-redhat-linux Configured with: ../configure --enable-bootstrap --enable-languages=c,c++,objc,obj-c++,fortran,ada,go,lto --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=http://bugzilla.redhat.com/bugzilla --enable-shared --enable-threads=posix --enable-checking=release --enable-multilib --with-system-zlib --enable-__cxa_atexit --disable-libunwind-exceptions --enable-gnu-unique-object --enable-linker-build-id --with-linker-hash-style=gnu --enable-plugin --enable-initfini-array --disable-libgcj --with-isl --enable-libmpx --enable-gnu-indirect-function --with-tune=generic --with-arch_32=i686 --build=x86_64-redhat-linux Thread model: posix gcc version 6.3.1 20161221 (Red Hat 6.3.1-1) (GCC) The two variants a) -fno-exceptions b) -std=c++11 -fno-exceptions give three times 100 percent If you don't 'shut-down' the exceptions the branch coverage will be at 60 percent. Regards Andre
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