CI: added code coverage workflow

.github/workflows/coverage.yml

@@ -0,0 +1,63 @@
+name: Code coverage
+
+on:
+  push:
+    branches: ["master", "test"]
+    paths-ignore:
+      - 'docker-compose/**'
+      - 'docs/**'
+      - 'README.md'
+
+  pull_request:
+
+jobs:
+  coverage:
+
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Install dependencies
+      run: |
+        sudo apt update
+        sudo apt install -y cmake libuv1-dev libzmq3-dev libgss-dev libcurl4-openssl-dev libidn2-0-dev lcov
+
+    - name: Checkout repository
+      uses: actions/checkout@v4
+      with:
+        submodules: recursive
+
+    - name: Build tests
+      run: |
+        cd tests
+        mkdir build
+        cd build
+        cmake .. -DCMAKE_BUILD_TYPE=Debug -DWITH_COVERAGE=ON -DCMAKE_C_COMPILER=gcc-14 -DCMAKE_CXX_COMPILER=g++-14 -DCMAKE_POLICY_VERSION_MINIMUM="3.5"
+        make -j$(nproc) p2pool_tests
+
+    - name: Run tests
+      run: |
+        cd tests/build
+        gunzip *.gz
+        ./p2pool_tests
+
+    - name: Run gcov
+      run: |
+        cd tests/build/CMakeFiles/p2pool_tests.dir/home/runner/work/p2pool/p2pool/src
+        gcov-14 *.gcda
+
+    - name: Run lcov
+      run: |
+        cd tests/build/CMakeFiles/p2pool_tests.dir/home/runner/work/p2pool/p2pool/src
+        lcov --gcov-tool gcov-14 --directory . --capture --output-file coverage.info
+
+    - name: Run genhtml
+      run: |
+        cd tests/build/CMakeFiles/p2pool_tests.dir/home/runner/work/p2pool/p2pool/src
+        genhtml --demangle-cpp -o coverage coverage.info
+
+    - name: Archive coverage data
+      uses: actions/upload-artifact@v4
+      with:
+        name: p2pool-coverage
+        path: tests/build/CMakeFiles/p2pool_tests.dir/home/runner/work/p2pool/p2pool/src/coverage

tests/CMakeLists.txt

@@ -5,6 +5,7 @@ include(cmake/standard.cmake)
 
 option(STATIC_LIBS "Use locally built libuv and libzmq static libs" OFF)
 option(WITH_LTO "Use link-time compiler optimization (if linking fails for you, run cmake with -DWITH_LTO=OFF)" ON)
+option(WITH_COVERAGE "Generate code coverage data" OFF)
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake")
 

tests/cmake/flags.cmake

@@ -3,7 +3,10 @@ if (CMAKE_CXX_COMPILER_ID MATCHES GNU)
 	set(WARNING_FLAGS "-Wall -Wextra")
 
 	if (CMAKE_BUILD_TYPE STREQUAL "Debug")
-		set(OPTIMIZATION_FLAGS "-O0 -g3 -ftrapv")
+		set(OPTIMIZATION_FLAGS "-O0 -g3")
+		if (WITH_COVERAGE)
+			set(OPTIMIZATION_FLAGS "${OPTIMIZATION_FLAGS} --coverage")
+		endif()
 	else()
 		set(OPTIMIZATION_FLAGS "-O3 -ffast-math -s")
 		if (WITH_LTO)