Restructured code of FindASan.cmake
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Alexander Haase
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4fd453301a
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#
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# The MIT License (MIT)
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#
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# Copyright (c) 2013 Matthew Arsenault
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@ -10,65 +9,116 @@
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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# THE SOFTWARE.
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#
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# This module tests if address sanitizer is supported by the compiler,
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# and creates a ASan build type (i.e. set CMAKE_BUILD_TYPE=ASan to use
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# it). This sets the following variables:
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#
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# CMAKE_C_FLAGS_ASAN - Flags to use for C with asan
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# CMAKE_CXX_FLAGS_ASAN - Flags to use for C++ with asan
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# HAVE_ADDRESS_SANITIZER - True or false if the ASan build type is available
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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include(CheckCCompilerFlag)
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# This module tests if address sanitizer is supported by the compiler. The
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# necessary flags for compiler and linker will be stored in variables. ASan can
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# be enabled for all targets with CMake build type "ASan", individual targets
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# can enable ASan with the saitize_address() function.
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# Set -Werror to catch "argument unused during compilation" warnings
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set(CMAKE_REQUIRED_FLAGS "-Werror -faddress-sanitizer") # Also needs to be a link flag for test to pass
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check_c_compiler_flag("-faddress-sanitizer" HAVE_FLAG_ADDRESS_SANITIZER)
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option(SANITIZE_ADDRESS "Selects wheter Address Sanitizer will be enabled for
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individual targets" Off)
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set(CMAKE_REQUIRED_FLAGS "-Werror -fsanitize=address") # Also needs to be a link flag for test to pass
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check_c_compiler_flag("-fsanitize=address" HAVE_FLAG_SANITIZE_ADDRESS)
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set(ASAN_FLAG_CANDIDATES
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# Clang 3.2+ use this version
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"-fsanitize=address"
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unset(CMAKE_REQUIRED_FLAGS)
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# Older deprecated flag for ASan
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"-faddress-sanitizer"
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)
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if(HAVE_FLAG_SANITIZE_ADDRESS)
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# Clang 3.2+ use this version
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set(ADDRESS_SANITIZER_FLAG "-fsanitize=address")
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elseif(HAVE_FLAG_ADDRESS_SANITIZER)
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# Older deprecated flag for ASan
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set(ADDRESS_SANITIZER_FLAG "-faddress-sanitizer")
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set(CMAKE_REQUIRED_QUIET_SAVE ${CMAKE_REQUIRED_QUIET})
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set(CMAKE_REQUIRED_QUIET ${ASan_FIND_QUIETLY})
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set(_ASAN_REQUIRED_VARS)
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foreach (LANG C CXX)
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if (NOT CMAKE_${LANG}_COMPILER_LOADED)
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continue()
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endif()
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list(APPEND _ASAN_REQUIRED_VARS ASAN_${LANG}_FLAGS)
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# If flags for this compiler were already found, do not try to find them
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# again.
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if (ASAN_${LANG}_FLAGS)
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continue()
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endif ()
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foreach (FLAG ${ASAN_FLAG_CANDIDATES})
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if(NOT CMAKE_REQUIRED_QUIET)
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message(STATUS "Try Address sanitizer ${LANG} flag = [${FLAG}]")
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endif()
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set(CMAKE_REQUIRED_FLAGS "${FLAG}")
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unset(ASAN_FLAG_DETECTED CACHE)
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if (${LANG} STREQUAL "C")
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include(CheckCCompilerFlag)
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check_c_compiler_flag("${FLAG}" ASAN_FLAG_DETECTED)
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elseif (${LANG} STREQUAL "CXX")
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include(CheckCXXCompilerFlag)
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check_cxx_compiler_flag("${FLAG}" ASAN_FLAG_DETECTED)
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endif()
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if (ASAN_FLAG_DETECTED)
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set(ASAN_${LANG}_FLAGS "${FLAG}"
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CACHE STRING "${LANG} compiler flags for Address sanitizer")
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break()
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endif ()
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endforeach()
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endforeach ()
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set(CMAKE_REQUIRED_QUIET ${CMAKE_REQUIRED_QUIET_SAVE})
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if (_ASAN_REQUIRED_VARS)
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include(FindPackageHandleStandardArgs)
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find_package_handle_standard_args(ASan REQUIRED_VARS ${_ASAN_REQUIRED_VARS})
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mark_as_advanced(${_ASAN_REQUIRED_VARS})
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unset(_ASAN_REQUIRED_VARS)
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else()
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message(SEND_ERROR "FindASan requires C or CXX language to be enabled")
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endif()
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if(NOT ADDRESS_SANITIZER_FLAG)
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return()
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else(NOT ADDRESS_SANITIZER_FLAG)
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set(HAVE_ADDRESS_SANITIZER FALSE)
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endif()
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set(HAVE_ADDRESS_SANITIZER TRUE)
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# add build target ASan
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if (ASan_FOUND)
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set(CMAKE_C_FLAGS_ASAN "${ASAN_C_FLAGS}" CACHE
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STRING "Flags used by the C compiler during ASan builds.")
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set(CMAKE_CXX_FLAGS_ASAN "${ASAN_CXX_FLAGS}" CACHE
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STRING "Flags used by the C++ compiler during ASan builds.")
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set(CMAKE_EXE_LINKER_FLAGS_ASAN "${ASAN_C_FLAGS}" CACHE
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STRING "Flags used for linking binaries during ASan builds.")
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set(CMAKE_SHARED_LINKER_FLAGS_ASAN "${ASAN_C_FLAGS}" CACHE
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STRING "Flags used by the shared libraries linker during ASan builds.")
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set(CMAKE_MODULE_LINKER_FLAGS_ASAN "${ASAN_C_FLAGS}" CACHE
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STRING "Flags used by the module libraries linker during ASan builds.")
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mark_as_advanced(CMAKE_C_FLAGS_ASAN
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CMAKE_CXX_FLAGS_ASAN
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CMAKE_EXE_LINKER_FLAGS_ASAN
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CMAKE_SHARED_LINKER_FLAGS_ASAN
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CMAKE_MODULE_LINKER_FLAGS_ASAN)
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endif ()
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set(CMAKE_C_FLAGS_ASAN "-O1 -g ${ADDRESS_SANITIZER_FLAG} -fno-omit-frame-pointer -fno-optimize-sibling-calls"
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CACHE STRING "Flags used by the C compiler during ASan builds."
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FORCE)
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set(CMAKE_CXX_FLAGS_ASAN "-O1 -g ${ADDRESS_SANITIZER_FLAG} -fno-omit-frame-pointer -fno-optimize-sibling-calls"
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CACHE STRING "Flags used by the C++ compiler during ASan builds."
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FORCE)
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set(CMAKE_EXE_LINKER_FLAGS_ASAN "${ADDRESS_SANITIZER_FLAG}"
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CACHE STRING "Flags used for linking binaries during ASan builds."
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FORCE)
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set(CMAKE_SHARED_LINKER_FLAGS_ASAN "${ADDRESS_SANITIZER_FLAG}"
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CACHE STRING "Flags used by the shared libraries linker during ASan builds."
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FORCE)
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mark_as_advanced(CMAKE_C_FLAGS_ASAN
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CMAKE_CXX_FLAGS_ASAN
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CMAKE_EXE_LINKER_FLAGS_ASAN
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CMAKE_SHARED_LINKER_FLAGS_ASAN)
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function (sanitize_address TARGET)
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if (NOT SANITIZE_ADDRESS)
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return()
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endif ()
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set_property(TARGET ${TARGET} APPEND_STRING PROPERTY
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COMPILE_FLAGS " ${ASAN_C_FLAGS}")
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set_property(TARGET ${TARGET} APPEND_STRING PROPERTY
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LINK_FLAGS " ${ASAN_C_FLAGS}")
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endfunction ()
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