Adding lemire's suggestion

Author: FranciscoThiesen

benchmarks/src/CMakeLists.txt

@@ -1,10 +1,6 @@
 cmake_minimum_required(VERSION 3.10)
 
 project(SerializatonTwitterBenchmark) # Name your project
-if (NOT CMAKE_BUILD_TYPE)
-  message(STATUS "No build type selected, default to Release")
-  set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
-endif()
 
 # Set C++ standard to C++17 or higher if needed
 #set(CMAKE_CXX_STANDARD 23)
@@ -14,6 +10,32 @@ endif()
 set(CMAKE_C_COMPILER clang)
 set(CMAKE_CXX_COMPILER clang++)
 
+
+option(SIMDJSON_SANITIZE_MEMORY "Sanitize memory" OFF)
+
+if(SIMDJSON_SANITIZE_MEMORY)
+  message(STATUS "Setting the memory sanitizer.")
+  add_compile_options(
+      -fsanitize=memory -fno-sanitize-recover=all
+  )
+  link_libraries(
+      -fsanitize=memory -fno-sanitize-recover=all
+  )
+endif()
+
+if(NOT CMAKE_BUILD_TYPE)
+  if(SIMDJSON_SANITIZE OR SIMDJSON_SANITIZE_UNDEFINED)
+    message(STATUS "No build type selected and you have enabled the sanitizer, \
+default to Debug. Consider setting CMAKE_BUILD_TYPE.")
+    message(STATUS "Setting debug optimization flag to -O1 to help sanitizer.")
+    set(CMAKE_CXX_FLAGS_DEBUG "-O1" CACHE STRING "" FORCE)
+    set(CMAKE_BUILD_TYPE Debug CACHE STRING "Choose the type of build." FORCE)
+  else()
+    message(STATUS "No build type selected, default to Release")
+    set(CMAKE_BUILD_TYPE Release CACHE STRING "Choose the type of build." FORCE)
+  endif()
+endif()
+
 # set(CMAKE_OSX_ARCHITECTURES "arm64")
 
 # if(CMAKE_BUILD_TYPE STREQUAL "Debug")