+macro(append_common_sanitizer_flags)
+ # Append -fno-omit-frame-pointer and turn on debug info to get better
+ # stack traces.
+ add_flag_if_supported("-fno-omit-frame-pointer")
+ if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
+ NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
+ add_flag_if_supported("-gline-tables-only")
+ endif()
+ # Use -O1 even in debug mode, otherwise sanitizers slowdown is too large.
+ if (uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG")
+ add_flag_if_supported("-O1")
+ endif()
+endmacro()
+
+# Turn on sanitizers if necessary.
+if(LLVM_USE_SANITIZER)
+ if (LLVM_ON_UNIX)
+ if (LLVM_USE_SANITIZER STREQUAL "Address")
+ append_common_sanitizer_flags()
+ add_flag_or_print_warning("-fsanitize=address")
+ elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?")
+ append_common_sanitizer_flags()
+ add_flag_or_print_warning("-fsanitize=memory")
+ if(LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins")
+ add_flag_or_print_warning("-fsanitize-memory-track-origins")
+ endif()
+ else()
+ message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}")
+ endif()
+ else()
+ message(WARNING "LLVM_USE_SANITIZER is not supported on this platform.")
+ endif()
+endif()
+
+# Turn on -gsplit-dwarf if requested
+if(LLVM_USE_SPLIT_DWARF)
+ add_llvm_definitions("-gsplit-dwarf")
+endif()
+