Changeset View

Standalone View

				# Check if the requested sanitizers are supported, and set the appropriated
				# flags.
				function(enable_sanitizers)
				# Build the -fsanitize= option
				list(JOIN ARGN "," _fsanitize_option_list)
				set(_fsanitize_option -fsanitize=${_fsanitize_option_list})

				include(SanitizeHelper)
				sanitize_c_cxx_definition("supports_" ${_fsanitize_option} _sanitizers_compile)

				# check_cxx_source_compiles() runs the compilation and link phases at the
				# same time, so add the flag under test for both.
				set(CMAKE_REQUIRED_FLAGS ${_fsanitize_option})
				set(_save_linker_flags ${CMAKE_EXE_LINKER_FLAGS})
				string(APPEND CMAKE_EXE_LINKER_FLAGS " ${_fsanitize_option}")

				include(CheckCXXSourceCompiles)
				check_cxx_source_compiles("
				#include <cstdint>
				#include <cstddef>
				extern \"C\" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size) { return 0; }
				__attribute__((weak)) int main() { return 0; }
				" ${_sanitizers_compile})

				set(CMAKE_EXE_LINKER_FLAGS ${_save_linker_flags})

				if(NOT ${_sanitizers_compile})
				message(FATAL_ERROR "The sanitizers option is not supported: ${_fsanitize_option}")
				endif()

				# Some sanitizers require some extra options to be efficient
				if("address" IN_LIST ARGN OR "undefined" IN_LIST ARGN)
				include(AddCompilerFlags)
				add_compiler_flags(-fno-omit-frame-pointer -fno-optimize-sibling-calls)
				endif()

				add_compile_options(${_fsanitize_option})
				add_link_options(${_fsanitize_option})
				endfunction()