Merge pull request #5117 from kimden/add-usan

Add an option for -fsanitize=undefined

CMakeLists.txt

@@ -111,6 +111,7 @@ endif()
 if(UNIX AND NOT APPLE)
     option(USE_ASAN   "Build with Leak/Address sanitizer" OFF)
     option(USE_TSAN   "Build with Thread sanitizer" OFF)
+    option(USE_USAN   "Build with Undefined Behaviour sanitizer" OFF)
     option(USE_LIBBFD "Use libbfd for crash reporting and leak check" OFF)
 endif()
 
@@ -122,6 +123,10 @@ if(USE_TSAN)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread -fno-omit-frame-pointer")
     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=thread -fno-omit-frame-pointer")
 endif()
+if(USE_USAN)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fsanitize=undefined -fno-omit-frame-pointer")
+endif()
 
 set(STK_SOURCE_DIR "src")
 set(STK_DATA_DIR "${PROJECT_SOURCE_DIR}/data")
@@ -781,6 +786,9 @@ if(UNIX AND NOT APPLE)
     if(USE_TSAN)
         target_link_libraries(supertuxkart "-fsanitize=thread")
     endif()
+    if(USE_USAN)
+        target_link_libraries(supertuxkart "-fsanitize=undefined")
+    endif()
 endif()
 
 if(BUILD_RECORDER)