# CMake build for CompilerRT. # # An important constraint of the build is that it only produces libraries # based on the ability of the host toolchain to target various platforms. cmake_minimum_required(VERSION 3.4.3) # Check if compiler-rt is built as a standalone project. if (CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR OR COMPILER_RT_STANDALONE_BUILD) project(CompilerRT C CXX ASM) set(COMPILER_RT_STANDALONE_BUILD TRUE) set_property(GLOBAL PROPERTY USE_FOLDERS ON) endif() # Add path for custom compiler-rt modules. list(INSERT CMAKE_MODULE_PATH 0 "${CMAKE_CURRENT_SOURCE_DIR}/cmake" "${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules" ) if(CMAKE_CONFIGURATION_TYPES) set(CMAKE_CFG_RESOLVED_INTDIR "${CMAKE_CFG_INTDIR}/") else() set(CMAKE_CFG_RESOLVED_INTDIR "") endif() include(base-config-ix) include(CompilerRTUtils) option(COMPILER_RT_BUILD_BUILTINS "Build builtins" ON) mark_as_advanced(COMPILER_RT_BUILD_BUILTINS) option(COMPILER_RT_BUILD_SANITIZERS "Build sanitizers" ON) mark_as_advanced(COMPILER_RT_BUILD_SANITIZERS) option(COMPILER_RT_BUILD_XRAY "Build xray" ON) mark_as_advanced(COMPILER_RT_BUILD_XRAY) option(COMPILER_RT_BUILD_LIBFUZZER "Build libFuzzer" ON) mark_as_advanced(COMPILER_RT_BUILD_LIBFUZZER) option(COMPILER_RT_BUILD_PROFILE "Build profile runtime" ON) mark_as_advanced(COMPILER_RT_BUILD_PROFILE) option(COMPILER_RT_BUILD_XRAY_NO_PREINIT "Build xray with no preinit patching" OFF) mark_as_advanced(COMPILER_RT_BUILD_XRAY_NO_PREINIT) set(COMPILER_RT_ASAN_SHADOW_SCALE "" CACHE STRING "Override the shadow scale to be used in ASan runtime") if (NOT COMPILER_RT_ASAN_SHADOW_SCALE STREQUAL "") # Check that the shadow scale value is valid. if (NOT (COMPILER_RT_ASAN_SHADOW_SCALE GREATER -1 AND COMPILER_RT_ASAN_SHADOW_SCALE LESS 8)) message(FATAL_ERROR " Invalid ASan Shadow Scale '${COMPILER_RT_ASAN_SHADOW_SCALE}'.") endif() set(COMPILER_RT_ASAN_SHADOW_SCALE_LLVM_FLAG -mllvm -asan-mapping-scale=${COMPILER_RT_ASAN_SHADOW_SCALE}) set(COMPILER_RT_ASAN_SHADOW_SCALE_DEFINITION ASAN_SHADOW_SCALE=${COMPILER_RT_ASAN_SHADOW_SCALE}) set(COMPILER_RT_ASAN_SHADOW_SCALE_FLAG -D${COMPILER_RT_ASAN_SHADOW_SCALE_DEFINITION}) endif() set(COMPILER_RT_BAREMETAL_BUILD OFF CACHE BOOLEAN "Build for a bare-metal target.") if (COMPILER_RT_STANDALONE_BUILD) load_llvm_config() if (TARGET intrinsics_gen) # Loading the llvm config causes this target to be imported so place it # under the appropriate folder in an IDE. set_target_properties(intrinsics_gen PROPERTIES FOLDER "Compiler-RT Misc") endif() # Find Python interpreter. set(Python_ADDITIONAL_VERSIONS 2.7 2.6 2.5) include(FindPythonInterp) if(NOT PYTHONINTERP_FOUND) message(FATAL_ERROR " Unable to find Python interpreter required testing. Please install Python or specify the PYTHON_EXECUTABLE CMake variable.") endif() # Define default arguments to lit. set(LIT_ARGS_DEFAULT "-sv") if (MSVC OR XCODE) set(LIT_ARGS_DEFAULT "${LIT_ARGS_DEFAULT} --no-progress-bar") endif() set(LLVM_LIT_ARGS "${LIT_ARGS_DEFAULT}" CACHE STRING "Default options for lit") set(LLVM_LIT_OUTPUT_DIR "${COMPILER_RT_EXEC_OUTPUT_DIR}") endif() construct_compiler_rt_default_triple() if ("${COMPILER_RT_DEFAULT_TARGET_ABI}" MATCHES "hf$") if (${COMPILER_RT_DEFAULT_TARGET_ARCH} MATCHES "^arm") set(COMPILER_RT_DEFAULT_TARGET_ARCH "armhf") endif() endif() if ("${COMPILER_RT_DEFAULT_TARGET_ABI}" MATCHES "^android") set(ANDROID 1) endif() pythonize_bool(ANDROID) set(COMPILER_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}) set(COMPILER_RT_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR}) pythonize_bool(LLVM_ENABLE_PER_TARGET_RUNTIME_DIR) # We support running instrumented tests when we're not cross compiling # and target a UNIX-like system or Windows. # We can run tests on Android even when we are cross-compiling. if(("${CMAKE_HOST_SYSTEM}" STREQUAL "${CMAKE_SYSTEM}" AND (UNIX OR WIN32)) OR ANDROID OR COMPILER_RT_EMULATOR) option(COMPILER_RT_CAN_EXECUTE_TESTS "Can we execute instrumented tests" ON) else() option(COMPILER_RT_CAN_EXECUTE_TESTS "Can we execute instrumented tests" OFF) endif() option(COMPILER_RT_DEBUG "Build runtimes with full debug info" OFF) option(COMPILER_RT_EXTERNALIZE_DEBUGINFO "Generate dSYM files and strip executables and libraries (Darwin Only)" OFF) # COMPILER_RT_DEBUG_PYBOOL is used by lit.common.configured.in. pythonize_bool(COMPILER_RT_DEBUG) if(APPLE AND SANITIZER_MIN_OSX_VERSION AND SANITIZER_MIN_OSX_VERSION VERSION_LESS "10.9") # Mac OS X prior to 10.9 had problems with exporting symbols from # libc++/libc++abi. set(cxxabi_supported OFF) else() set(cxxabi_supported ON) endif() option(SANITIZER_ALLOW_CXXABI "Allow use of C++ ABI details in ubsan" ON) set(SANITIZE_CAN_USE_CXXABI OFF) if (cxxabi_supported AND SANITIZER_ALLOW_CXXABI) set(SANITIZER_CAN_USE_CXXABI ON) endif() pythonize_bool(SANITIZER_CAN_USE_CXXABI) set(SANITIZER_CXX_ABI "default" CACHE STRING "Specify C++ ABI library to use.") set(CXXABIS none default libstdc++ libc++) set_property(CACHE SANITIZER_CXX_ABI PROPERTY STRINGS ;${CXXABIS}) if (SANITIZER_CXX_ABI STREQUAL "default") if (APPLE) set(SANITIZER_CXX_ABI_LIBNAME "libc++") set(SANITIZER_CXX_ABI_SYSTEM 1) elseif (FUCHSIA) set(SANITIZER_CXX_ABI_LIBNAME "libc++") set(SANITIZER_CXX_ABI_INTREE 1) else() set(SANITIZER_CXX_ABI_LIBNAME "libstdc++") set(SANITIZER_CXX_ABI_SYSTEM 1) endif() else() set(SANITIZER_CXX_ABI_LIBNAME "${SANITIZER_CXX_ABI}") set(SANITIZER_CXX_ABI_SYSTEM 1) endif() set(DEFAULT_COMPILER_RT_USE_BUILTINS_LIBRARY OFF) if (FUCHSIA) set(DEFAULT_COMPILER_RT_USE_BUILTINS_LIBRARY ON) endif() option(COMPILER_RT_USE_BUILTINS_LIBRARY "Use compiler-rt builtins instead of libgcc" ${DEFAULT_COMPILER_RT_USE_BUILTINS_LIBRARY}) include(config-ix) #================================ # Setup Compiler Flags #================================ if(MSVC) # Override any existing /W flags with /W4. This is what LLVM does. Failing to # remove other /W[0-4] flags will result in a warning about overriding a # previous flag. if (COMPILER_RT_HAS_W4_FLAG) string(REGEX REPLACE " /W[0-4]" "" CMAKE_C_FLAGS "${CMAKE_C_FLAGS}") string(REGEX REPLACE " /W[0-4]" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}") append_string_if(COMPILER_RT_HAS_W4_FLAG /W4 CMAKE_C_FLAGS CMAKE_CXX_FLAGS) endif() else() append_string_if(COMPILER_RT_HAS_WALL_FLAG -Wall CMAKE_C_FLAGS CMAKE_CXX_FLAGS) endif() if(COMPILER_RT_ENABLE_WERROR) append_string_if(COMPILER_RT_HAS_WERROR_FLAG -Werror CMAKE_C_FLAGS CMAKE_CXX_FLAGS) append_string_if(COMPILER_RT_HAS_WX_FLAG /WX CMAKE_C_FLAGS CMAKE_CXX_FLAGS) endif() append_string_if(COMPILER_RT_HAS_STD_CXX11_FLAG -std=c++11 CMAKE_CXX_FLAGS) # Emulate C99 and C++11's __func__ for MSVC prior to 2013 CTP. if(NOT COMPILER_RT_HAS_FUNC_SYMBOL) add_definitions(-D__func__=__FUNCTION__) endif() # Provide some common commmandline flags for Sanitizer runtimes. if(NOT WIN32) append_list_if(COMPILER_RT_HAS_FPIC_FLAG -fPIC SANITIZER_COMMON_CFLAGS) endif() append_list_if(COMPILER_RT_HAS_FNO_BUILTIN_FLAG -fno-builtin SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FNO_EXCEPTIONS_FLAG -fno-exceptions SANITIZER_COMMON_CFLAGS) if(NOT COMPILER_RT_DEBUG AND NOT APPLE) append_list_if(COMPILER_RT_HAS_FOMIT_FRAME_POINTER_FLAG -fomit-frame-pointer SANITIZER_COMMON_CFLAGS) endif() append_list_if(COMPILER_RT_HAS_FUNWIND_TABLES_FLAG -funwind-tables SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FNO_STACK_PROTECTOR_FLAG -fno-stack-protector SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FNO_SANITIZE_SAFE_STACK_FLAG -fno-sanitize=safe-stack SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG -fvisibility=hidden SANITIZER_COMMON_CFLAGS) if(NOT COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG) append_list_if(COMPILER_RT_HAS_FVISIBILITY_INLINES_HIDDEN_FLAG -fvisibility-inlines-hidden SANITIZER_COMMON_CFLAGS) endif() append_list_if(COMPILER_RT_HAS_FNO_LTO_FLAG -fno-lto SANITIZER_COMMON_CFLAGS) # The following is a workaround for powerpc64le. This is the only architecture # that requires -fno-function-sections to work properly. If lacking, the ASan # Linux test function-sections-are-bad.cc fails with the following error: # 'undefined symbol: __sanitizer_unaligned_load32'. if(DEFINED TARGET_powerpc64le_CFLAGS) append_list_if(COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG -fno-function-sections TARGET_powerpc64le_CFLAGS) endif() if(MSVC) # Replace the /M[DT][d] flags with /MT, and strip any definitions of _DEBUG, # which cause definition mismatches at link time. # FIXME: In fact, sanitizers should support both /MT and /MD, see PR20214. if(COMPILER_RT_HAS_MT_FLAG) foreach(flag_var CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO) string(REGEX REPLACE "/M[DT]d" "/MT" ${flag_var} "${${flag_var}}") string(REGEX REPLACE "/MD" "/MT" ${flag_var} "${${flag_var}}") string(REGEX REPLACE "/D_DEBUG" "" ${flag_var} "${${flag_var}}") endforeach() endif() append_list_if(COMPILER_RT_HAS_Oy_FLAG /Oy- SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_GS_FLAG /GS- SANITIZER_COMMON_CFLAGS) # VS 2015 (version 1900) added support for thread safe static initialization. # However, ASan interceptors run before CRT initialization, which causes the # new thread safe code to crash. Disable this feature for now. if (MSVC_VERSION GREATER 1899 OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang") list(APPEND SANITIZER_COMMON_CFLAGS /Zc:threadSafeInit-) endif() endif() append_list_if(COMPILER_RT_DEBUG -DSANITIZER_DEBUG=1 SANITIZER_COMMON_CFLAGS) # If we're using MSVC, # always respect the optimization flags set by CMAKE_BUILD_TYPE instead. if (NOT MSVC) # Build with optimization, unless we're in debug mode. if(COMPILER_RT_DEBUG) list(APPEND SANITIZER_COMMON_CFLAGS -O0) else() list(APPEND SANITIZER_COMMON_CFLAGS -O3) endif() endif() # Determine if we should restrict stack frame sizes. # Stack frames on PowerPC and Mips and in debug biuld can be much larger than # anticipated. # FIXME: Fix all sanitizers and add -Wframe-larger-than to # SANITIZER_COMMON_FLAGS if(COMPILER_RT_HAS_WFRAME_LARGER_THAN_FLAG AND NOT COMPILER_RT_DEBUG AND NOT ${COMPILER_RT_DEFAULT_TARGET_ARCH} MATCHES "powerpc|mips") set(SANITIZER_LIMIT_FRAME_SIZE TRUE) else() set(SANITIZER_LIMIT_FRAME_SIZE FALSE) endif() if(FUCHSIA OR UNIX) set(SANITIZER_USE_SYMBOLS TRUE) else() set(SANITIZER_USE_SYMBOLS FALSE) endif() # Build sanitizer runtimes with debug info. if(MSVC) # Use /Z7 instead of /Zi for the asan runtime. This avoids the LNK4099 # warning from the MS linker complaining that it can't find the 'vc140.pdb' # file used by our object library compilations. list(APPEND SANITIZER_COMMON_CFLAGS /Z7) llvm_replace_compiler_option(CMAKE_CXX_FLAGS "/Z[i7I]" "/Z7") llvm_replace_compiler_option(CMAKE_CXX_FLAGS_DEBUG "/Z[i7I]" "/Z7") llvm_replace_compiler_option(CMAKE_CXX_FLAGS_RELWITHDEBINFO "/Z[i7I]" "/Z7") elseif(COMPILER_RT_HAS_GLINE_TABLES_ONLY_FLAG AND NOT COMPILER_RT_DEBUG) list(APPEND SANITIZER_COMMON_CFLAGS -gline-tables-only) elseif(COMPILER_RT_HAS_G_FLAG) list(APPEND SANITIZER_COMMON_CFLAGS -g) endif() if(LLVM_ENABLE_MODULES) # Sanitizers cannot be built with -fmodules. The interceptors intentionally # don't include system headers, which is incompatible with modules. list(APPEND SANITIZER_COMMON_CFLAGS -fno-modules) endif() # Turn off several warnings. append_list_if(COMPILER_RT_HAS_WGNU_FLAG -Wno-gnu SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WVARIADIC_MACROS_FLAG -Wno-variadic-macros SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WC99_EXTENSIONS_FLAG -Wno-c99-extensions SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WNON_VIRTUAL_DTOR_FLAG -Wno-non-virtual-dtor SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WD4146_FLAG /wd4146 SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WD4291_FLAG /wd4291 SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WD4391_FLAG /wd4391 SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WD4722_FLAG /wd4722 SANITIZER_COMMON_CFLAGS) append_list_if(COMPILER_RT_HAS_WD4800_FLAG /wd4800 SANITIZER_COMMON_CFLAGS) # Set common link flags. append_list_if(COMPILER_RT_HAS_NODEFAULTLIBS_FLAG -nodefaultlibs SANITIZER_COMMON_LINK_FLAGS) if (COMPILER_RT_USE_BUILTINS_LIBRARY) list(APPEND SANITIZER_COMMON_LINK_LIBS ${COMPILER_RT_BUILTINS_LIBRARY}) else() if (ANDROID) append_list_if(COMPILER_RT_HAS_GCC_LIB gcc SANITIZER_COMMON_LINK_LIBS) else() append_list_if(COMPILER_RT_HAS_GCC_S_LIB gcc_s SANITIZER_COMMON_LINK_LIBS) endif() endif() append_list_if(COMPILER_RT_HAS_LIBC c SANITIZER_COMMON_LINK_LIBS) if(ANDROID) # Put the Sanitizer shared libraries in the global group. For more details, see # android-changes-for-ndk-developers.md#changes-to-library-search-order if (COMPILER_RT_HAS_Z_GLOBAL) list(APPEND SANITIZER_COMMON_LINK_FLAGS -Wl,-z,global) endif() endif() if("${CMAKE_SYSTEM_NAME}" STREQUAL "Fuchsia") list(APPEND SANITIZER_COMMON_LINK_FLAGS -Wl,-z,defs,-z,now,-z,relro) list(APPEND SANITIZER_COMMON_LINK_LIBS zircon) endif() if (SANITIZER_CXX_ABI_LIBNAME STREQUAL "libc++") if (SANITIZER_CXX_ABI_INTREE) if (NOT LIBCXXABI_ENABLE_STATIC_UNWINDER AND (TARGET unwind_shared OR HAVE_LIBUNWIND)) list(APPEND SANITIZER_CXX_ABI_LIBRARY unwind_shared) elseif (LIBCXXABI_ENABLE_STATIC_UNWINDER AND (TARGET unwind_static OR HAVE_LIBUNWIND)) list(APPEND SANITIZER_CXX_ABI_LIBRARY unwind_static) endif() if (NOT LIBCXX_ENABLE_STATIC_ABI_LIBRARY AND (TARGET cxxabi_shared OR HAVE_LIBCXXABI)) list(APPEND SANITIZER_CXX_ABI_LIBRARY cxxabi_shared) elseif (LIBCXX_ENABLE_STATIC_ABI_LIBRARY AND (TARGET cxxabi_static OR HAVE_LIBCXXABI)) list(APPEND SANITIZER_CXX_ABI_LIBRARY cxxabi_static) endif() else() append_list_if(COMPILER_RT_HAS_LIBCXX c++ SANITIZER_CXX_ABI_LIBRARY) endif() elseif (SANITIZER_CXX_ABI_LIBNAME STREQUAL "libcxxabi") list(APPEND SANITIZER_CXX_ABI_LIBRARY "c++abi") elseif (SANITIZER_CXX_ABI_LIBNAME STREQUAL "libstdc++") append_list_if(COMPILER_RT_HAS_LIBSTDCXX stdc++ SANITIZER_CXX_ABI_LIBRARY) endif() # Warnings to turn off for all libraries, not just sanitizers. append_string_if(COMPILER_RT_HAS_WUNUSED_PARAMETER_FLAG -Wno-unused-parameter CMAKE_C_FLAGS CMAKE_CXX_FLAGS) if (CMAKE_LINKER MATCHES "link.exe$") # Silence MSVC linker warnings caused by empty object files. The # sanitizer libraries intentionally use ifdefs that result in empty # files, rather than skipping these files in the build system. # Ideally, we would pass this flag only for the libraries that need # it, but CMake doesn't seem to have a way to set linker flags for # individual static libraries, so we enable the suppression flag for # the whole compiler-rt project. set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /IGNORE:4221") endif() add_subdirectory(include) foreach(path IN ITEMS ${LLVM_MAIN_SRC_DIR}/projects/libcxx ${LLVM_MAIN_SRC_DIR}/runtimes/libcxx ${LLVM_MAIN_SRC_DIR}/../libcxx ${LLVM_EXTERNAL_LIBCXX_SOURCE_DIR}) if(IS_DIRECTORY ${path}) set(COMPILER_RT_LIBCXX_PATH ${path}) break() endif() endforeach() set(COMPILER_RT_LLD_PATH ${LLVM_MAIN_SRC_DIR}/tools/lld) if(EXISTS ${COMPILER_RT_LLD_PATH}/ AND LLVM_TOOL_LLD_BUILD) set(COMPILER_RT_HAS_LLD TRUE) else() set(COMPILER_RT_LLD_PATH ${LLVM_MAIN_SRC_DIR}/../lld) if(EXISTS ${COMPILER_RT_LLD_PATH}/ AND LLVM_TOOL_LLD_BUILD) set(COMPILER_RT_HAS_LLD TRUE) else() set(COMPILER_RT_HAS_LLD FALSE) endif() endif() pythonize_bool(COMPILER_RT_HAS_LLD) add_subdirectory(lib) if(COMPILER_RT_INCLUDE_TESTS) add_subdirectory(unittests) add_subdirectory(test) if (COMPILER_RT_STANDALONE_BUILD) # If we have a valid source tree, generate llvm-lit into the bin directory. # The user can still choose to have the check targets *use* a different lit # by specifying -DLLVM_EXTERNAL_LIT, but we generate it regardless. if (EXISTS ${LLVM_MAIN_SRC_DIR}/utils/llvm-lit) add_subdirectory(${LLVM_MAIN_SRC_DIR}/utils/llvm-lit ${CMAKE_CURRENT_BINARY_DIR}/llvm-lit) elseif(NOT EXISTS ${LLVM_EXTERNAL_LIT}) message(WARNING "Could not find LLVM source directory and LLVM_EXTERNAL_LIT does not" "point to a valid file. You will not be able to run tests.") endif() endif() endif()