MXS-2152: Add rudimentary test coverage collection

If the build is configred with -DGCOV=Y, a HTML report of code coverage is
generated in the log publish directory.

BUILD/install_build_deps.sh

@@ -97,9 +97,9 @@ else
     grep "release 6" /etc/redhat-release
     if [ $? -ne 0 ]
     then
-        # Installed for REST API and MaxCtrl unit tests
+        # EPEL is installed for REST API and MaxCtrl unit tests (docker-compose etc.) and GCOV report generation (lcov)
         sudo yum -y install docker epel-release
-        sudo yum -y install docker-compose
+        sudo yum -y install docker-compose lcov
         sudo groupadd docker
         sudo usermod -a -G docker `whoami`
         sudo sed -i 's/--selinux-enabled/--selinux-enabled=false/' /etc/sysconfig/docker

CMakeLists.txt

@@ -141,8 +141,7 @@ if(CMAKE_VERSION VERSION_GREATER 2.6)
 endif()
 
 if(GCOV)
-  set(FLAGS "${FLAGS} -fprofile-arcs -ftest-coverage" CACHE STRING "Compilation flags"  FORCE)
+  set(FLAGS "${FLAGS} --coverage -O0 -g" CACHE STRING "Compilation flags"  FORCE)
-  set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -lgcov")
 endif()
 
 if(PROFILE)

maxscale-system-test/mdbci/run_test.sh

@@ -56,6 +56,12 @@ export mdbci_config_name=`echo ${mdbci_config_name} | sed "s/?//g"`
 export provider=`mdbci show provider $box --silent 2> /dev/null`
 export backend_box=${backend_box:-"centos_7_"$provider}
 
+export sshuser=`mdbci ssh --command 'whoami' --silent $mdbci_config_name/maxscale_000 2> /dev/null | tr -d '\r'`
+export IP=`mdbci show network $mdbci_config_name/maxscale_000 --silent 2> /dev/null`
+export sshkey=`mdbci show keyfile $mdbci_config_name/maxscale_000 --silent 2> /dev/null | sed 's/"//g'`
+export scpopt="-i $sshkey -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -o ConnectTimeout=120 "
+export sshopt="$scpopt $sshuser@$IP"
+
 mdbci destroy ${mdbci_config_name}
 
 . ${script_dir}/configure_log_dir.sh
@@ -63,6 +69,17 @@ mdbci destroy ${mdbci_config_name}
 ulimit -c unlimited
 
 cd ${script_dir}/../../
+
+if [[ "$cmake_flags" =~ "GCOV=Y" ]]
+then
+    echo "Building MaxScale from source on maxscale_000"
+    rsync -avz --delete -e "ssh $scpopt" ${script_dir}/../../ $sshuser@$IP:/tmp/MaxScale/
+    ssh $sshopt "/tmp/MaxScale/BUILD/install_build_deps.sh"
+    ssh $sshopt "mkdir /tmp/build && cd /tmp/build && cmake ../MaxScale -DCMAKE_INSTALL_PREFIX=/usr -DGCOV=Y && make && sudo make install"
+    ssh $sshopt "sudo chmod -R a+rwx /tmp/build"
+    ssh $sshopt "sudo systemctl daemon-reload"
+fi
+
 mkdir build && cd build
 cmake .. -DBUILD_SYSTEM_TESTS=Y -DBUILDNAME=${mdbci_config_name} -DCMAKE_BUILD_TYPE=Debug
 cd maxscale-system-test
@@ -82,6 +99,13 @@ if [ ! -z "${named_test}" ] ; then
 else
     ctest -VV ${test_set}
 fi
+
+if [[ "$cmake_flags" =~ "GCOV=Y" ]]
+then
+    ssh $sshopt "cd /tmp/build && lcov --gcov-tool=$(command -v gcov) -c -d . -o lcov.info && genhtml -o /tmp/gcov-report/ lcov.info"
+    rsync -avz --delete -e "ssh $scpopt" $sshuser@$IP:/tmp/gcov-report/ ./${logs_publish_dir}
+fi
+
 cp core.* ${logs_publish_dir}
 ${script_dir}/copy_logs.sh
 cd $dir