Merge pull request #505 from Martinfx/max-add-memory-sanitizer

Add memory sanitizer for better debug

CMakeLists.txt

@@ -5,6 +5,7 @@ option(BUILD_EXAMPLES "Build the examples." ON)
 option(BUILD_GAMES "Build the example games." ON)
 option(ENABLE_ASAN  "Enable AddressSanitizer (ASAN) for debugging (degrades performance)" OFF)
 option(ENABLE_UBSAN "Enable UndefinedBehaviorSanitizer (UBSan) for debugging" OFF)
+option(ENABLE_MSAN "Enable MemorySanitizer (MSan) for debugging (not recommended for run with ASAN)" OFF)
 
 if(CMAKE_VERSION VERSION_LESS "3.1")
   if(CMAKE_C_COMPILER_ID STREQUAL "GNU")
@@ -40,6 +41,14 @@ if (ENABLE_UBSAN)
     add_if_flag_works(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
     add_if_flag_works(-fsanitize=undefined CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
 endif()
+if (ENABLE_MSAN)
+    add_if_flag_works(-fno-omit-frame-pointer CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
+    add_if_flag_works(-fsanitize=memory CMAKE_C_FLAGS CMAKE_LINKER_FLAGS)
+endif()
+
+if (ENABLE_MSAN AND ENABLE_ASAN)
+    MESSAGE(WARNING "Compiling with both AddressSanitizer and MemorySanitizer is not recommended")
+endif()
 
 add_subdirectory(src release)