add TSAN option to cmake (#444)

* add TSAN option to cmake

* disable security hardened build when TSAN is on

* handling user-specified SECURITY_HARDEDED option

CMakeLists.txt

@@ -204,6 +204,15 @@ IF (WITH_ASAN)
   ENDIF()
 ENDIF()
 
+OPTION(WITH_TSAN "Enable thread sanitizer" OFF)
+IF (WITH_TSAN)
+  IF(SECURITY_HARDENED)
+    MESSAGE(FATAL_ERROR "WITH_TSAN and SECURITY_HARDENED are mutually exclusive")
+  ENDIF()
+  MY_CHECK_AND_SET_COMPILER_FLAG("-fsanitize=thread" DEBUG RELWITHDEBINFO)
+ENDIF()
+
+IF(NOT WITH_TSAN)
   # enable security hardening features, like most distributions do
   # in our benchmarks that costs about ~1% of performance, depending on the load
   IF(CMAKE_C_COMPILER_VERSION VERSION_LESS "4.6")
@@ -219,6 +228,7 @@ IF(SECURITY_HARDENED)
     MY_CHECK_AND_SET_COMPILER_FLAG("-fstack-protector --param=ssp-buffer-size=4")
     MY_CHECK_AND_SET_COMPILER_FLAG("-D_FORTIFY_SOURCE=2" RELEASE RELWITHDEBINFO)
   ENDIF()
+ENDIF()
 
 # Always enable debug sync for debug builds.
 SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DENABLED_DEBUG_SYNC")