Add a new make target to generate coverage data of sonic CPP project

rules/sonic-cpp-coverage.mk

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+# Generate code coverage report for cpp project. Currently support:
+#     1. sonic-swss-common
+#     2. sonic-sairedis
+#     3. sonic-swss
+
+sonic-coverage-tools:
+	/bin/bash $(BUILD_WORKDIR)/src/sonic-cpp-coverage/install-tools.sh
+
+sonic-swss-common-coverage: sonic-coverage-tools
+	/bin/bash $(BUILD_WORKDIR)/src/sonic-cpp-coverage/sonic-swss-common.sh
+
+sonic-sairedis-coverage: sonic-coverage-tools
+	/bin/bash $(BUILD_WORKDIR)/src/sonic-cpp-coverage/sonic-sairedis.sh

src/sonic-cpp-coverage/install-tools.sh

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+set -ex
+cd /sonic/src/sonic-cpp-coverage
+
+# Install gcovr
+git clone https://github.com/gcovr/gcovr.git
+cd gcovr/
+git checkout 5.2
+sudo pip3 install setuptools
+sudo python3 setup.py install
+cd ..
+sudo rm -rf gcovr
+
+# Install redis
+sudo apt-get install -y redis-server
+sudo sed -i 's/notify-keyspace-events ""/notify-keyspace-events AKE/' /etc/redis/redis.conf
+sudo sed -ri 's/^# unixsocket/unixsocket/' /etc/redis/redis.conf
+sudo sed -ri 's/^unixsocketperm .../unixsocketperm 777/' /etc/redis/redis.conf
+sudo sed -ri 's/redis-server.sock/redis.sock/' /etc/redis/redis.conf
+sudo service redis-server restart
+sudo rm -rf /var/run/sswsyncd
+sudo mkdir -m 755 /var/run/sswsyncd
+
+# Install rsyslog
+sudo apt-get install -y rsyslog
+sudo service rsyslog start
+
+# Install libyang
+mkdir dep-libyang
+cp /sonic/target/debs/bullseye/libyang-*.deb ./dep-libyang
+cp /sonic/target/debs/bullseye/libyang_*.deb ./dep-libyang
+sudo dpkg -i $(find ./dep-libyang -name "*.deb")
+sudo rm -rf dep-libyang
+
+# Create yang model folder
+sudo rm -rf /usr/local/yang-models
+sudo mkdir /usr/local/yang-models
+
+# Install Pympler
+sudo pip3 install Pympler==0.8
+
+# Install .NET CORE
+curl -sSL https://packages.microsoft.com/keys/microsoft.asc | sudo apt-key add -
+sudo apt-add-repository https://packages.microsoft.com/debian/11/prod
+sudo apt-get update
+sudo apt-get install -y dotnet-sdk-6.0
+
+# Install report tool
+already_installed=`sudo dotnet tool list -g | grep dotnet-reportgenerator-globaltool || true`
+if [[ $already_installed == "" ]]; then
+    sudo dotnet tool install -g dotnet-reportgenerator-globaltool
+fi
+
+# Install diff cover tool
+sudo pip3 install diff_cover

src/sonic-cpp-coverage/sonic-sairedis.sh

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+# Build target to make it auto install dependencies
+set -ex
+cd /sonic
+#rm -f target/debs/bullseye/syncd_1.0.0_amd64.deb
+make -f slave.mk target/debs/bullseye/syncd_1.0.0_amd64.deb-install
+cd /sonic/src/sonic-sairedis
+
+# Install sonic-swss-common
+sudo dpkg -i /sonic/target/debs/bullseye/libswsscommon_1.0.0_amd64.deb
+sudo dpkg -i /sonic/target/debs/bullseye/libswsscommon-dev_1.0.0_amd64.deb
+
+# Build target
+rm ../*.deb || true
+./autogen.sh
+extraflags='--enable-code-coverage'
+DEB_BUILD_OPTIONS=nocheck DEB_CONFIGURE_EXTRA_FLAGS=$extraflags dpkg-buildpackage -us -uc -b -Psyncd,vs,nopython2 -j$(nproc)
+mv ../*.deb .
+
+# Update rsyslog.conf
+sudo cp azsyslog.conf /etc/rsyslog.conf
+sudo service rsyslog restart
+
+# Generate coverage.xml
+sudo setcap "cap_sys_time=eip" syncd/.libs/syncd_tests
+sudo setcap "cap_dac_override,cap_ipc_lock,cap_ipc_owner,cap_sys_time=eip" unittest/syncd/.libs/tests
+redis-cli FLUSHALL
+make check
+gcovr --version
+find SAI/meta -name "*.gc*" | xargs rm -vf
+gcov_dirs=$(find . -path "*.libs*gcda" | xargs dirname | sort -u |  cut -c"3-")
+for dir in ${gcov_dirs}; do
+    source_dir=$(dirname $dir)
+    output_file="coverage-$source_dir.json"
+    gcovr --exclude-unreachable-branches --json-pretty -o $output_file --object-directory $source_dir $dir
+done
+gcovr -r ./ -e ".*/SAI/.*" -e ".+/json.hpp" -e "swss/.+" -e ".*/.libs/.*" -e ".*/debian/.*" --exclude-unreachable-branches --json-pretty -o coverage-all.json
+gcovr -a "coverage-*.json" -x --xml-pretty -o coverage.xml
+
+# Generate HTML full report
+sudo /root/.dotnet/tools/reportgenerator -reports:"./coverage.xml" -targetdir:"htmlcov" -reporttypes:Html
+echo "sonic-sairedis full coverage report is at src/sonic-sairedis/htmlcov"
+
+# Generate diff report
+diff-cover coverage.xml --html-report report.html --compare-branch=origin/master --fail-under=80
+echo "sonic-sairedis diff coverage report is at src/sonic-sairedis/report.html"

src/sonic-cpp-coverage/sonic-swss-common.sh

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+# Build target to make it auto install dependencies
+set -ex
+cd /sonic
+rm -f target/debs/bullseye/libswsscommon_1.0.0_amd64.deb
+make -f slave.mk target/debs/bullseye/libswsscommon_1.0.0_amd64.deb-install
+cd /sonic/src/sonic-swss-common
+
+# Clean previous coverage data if any
+sudo rm -rf $(find . -name "*.gcda")
+sudo rm -rf $(find . -name "*.gcno")
+sudo git clean -d -f
+
+# Build target
+rm ../*.deb || true
+./autogen.sh
+make clean || true
+fakeroot debian/rules DEB_CONFIGURE_EXTRA_FLAGS='--enable-code-coverage' DEB_BUILD_PROFILES=nopython2 CFLAGS="" CXXFLAGS="--coverage -fprofile-abs-path" LDFLAGS="--coverage -fprofile-abs-path" binary
+mv ../*.deb .
+
+# Install target debs
+sudo dpkg -i libswsscommon_*.deb
+sudo dpkg -i libswsscommon-dev_*.deb
+sudo dpkg -i python3-swsscommon_*.deb
+
+# Run tests and collect coverage data
+redis-cli FLUSHALL
+./tests/tests
+redis-cli FLUSHALL
+pytest-3 --cov=. --cov-report=xml
+[ -f coverage.xml ] && mv coverage.xml tests/coverage.xml
+gcovr -r ./ -e ".*/swsscommon_wrap.cpp" -e=tests --exclude-unreachable-branches --exclude-throw-branches --gcov-ignore-parse-errors -x --xml-pretty  -o coverage.xml
+make -C goext
+redis-cli FLUSHALL
+make -C goext check
+
+# Generate HTML full report
+sudo /root/.dotnet/tools/reportgenerator -reports:"./coverage.xml" -targetdir:"htmlcov" -reporttypes:Html
+echo "sonic-swss-common full coverage report is at src/sonic-swss-common/htmlcov"
+
+# Generate diff report
+diff-cover coverage.xml --html-report report.html --compare-branch=origin/master --fail-under=80
+echo "sonic-swss-common diff coverage report is at src/sonic-swss-common/report.html"