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+# The MIT License (MIT)
+#
+# Copyright (c)
+# 2013 Matthew Arsenault
+# 2015-2016 RWTH Aachen University, Federal Republic of Germany
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+# Helper function to get the language of a source file.
+function (sanitizer_lang_of_source FILE RETURN_VAR)
+ get_filename_component(FILE_EXT "${FILE}" EXT)
+ string(TOLOWER "${FILE_EXT}" FILE_EXT)
+ string(SUBSTRING "${FILE_EXT}" 1 -1 FILE_EXT)
+
+ get_property(ENABLED_LANGUAGES GLOBAL PROPERTY ENABLED_LANGUAGES)
+ foreach (LANG ${ENABLED_LANGUAGES})
+ list(FIND CMAKE_${LANG}_SOURCE_FILE_EXTENSIONS "${FILE_EXT}" TEMP)
+ if (NOT ${TEMP} EQUAL -1)
+ set(${RETURN_VAR} "${LANG}" PARENT_SCOPE)
+ return()
+ endif ()
+ endforeach()
+
+ set(${RETURN_VAR} "" PARENT_SCOPE)
+endfunction ()
+
+
+# Helper function to get compilers used by a target.
+function (sanitizer_target_compilers TARGET RETURN_VAR)
+ # Check if all sources for target use the same compiler. If a target uses
+ # e.g. C and Fortran mixed and uses different compilers (e.g. clang and
+ # gfortran) this can trigger huge problems, because different compilers may
+ # use different implementations for sanitizers.
+ set(BUFFER "")
+ get_target_property(TSOURCES ${TARGET} SOURCES)
+ foreach (FILE ${TSOURCES})
+ # If expression was found, FILE is a generator-expression for an object
+ # library. Object libraries will be ignored.
+ string(REGEX MATCH "TARGET_OBJECTS:([^ >]+)" _file ${FILE})
+ if ("${_file}" STREQUAL "")
+ sanitizer_lang_of_source(${FILE} LANG)
+ if (LANG)
+ list(APPEND BUFFER ${CMAKE_${LANG}_COMPILER_ID})
+ endif ()
+ endif ()
+ endforeach ()
+
+ list(REMOVE_DUPLICATES BUFFER)
+ set(${RETURN_VAR} "${BUFFER}" PARENT_SCOPE)
+endfunction ()
+
+
+# Helper function to check compiler flags for language compiler.
+function (sanitizer_check_compiler_flag FLAG LANG VARIABLE)
+ if (${LANG} STREQUAL "C")
+ include(CheckCCompilerFlag)
+ check_c_compiler_flag("${FLAG}" ${VARIABLE})
+
+ elseif (${LANG} STREQUAL "CXX")
+ include(CheckCXXCompilerFlag)
+ check_cxx_compiler_flag("${FLAG}" ${VARIABLE})
+
+ elseif (${LANG} STREQUAL "Fortran")
+ # CheckFortranCompilerFlag was introduced in CMake 3.x. To be compatible
+ # with older Cmake versions, we will check if this module is present
+ # before we use it. Otherwise we will define Fortran coverage support as
+ # not available.
+ include(CheckFortranCompilerFlag OPTIONAL RESULT_VARIABLE INCLUDED)
+ if (INCLUDED)
+ check_fortran_compiler_flag("${FLAG}" ${VARIABLE})
+ elseif (NOT CMAKE_REQUIRED_QUIET)
+ message(STATUS "Performing Test ${VARIABLE}")
+ message(STATUS "Performing Test ${VARIABLE}"
+ " - Failed (Check not supported)")
+ endif ()
+ endif()
+endfunction ()
+
+
+# Helper function to test compiler flags.
+function (sanitizer_check_compiler_flags FLAG_CANDIDATES NAME PREFIX)
+ set(CMAKE_REQUIRED_QUIET ${${PREFIX}_FIND_QUIETLY})
+
+ get_property(ENABLED_LANGUAGES GLOBAL PROPERTY ENABLED_LANGUAGES)
+ foreach (LANG ${ENABLED_LANGUAGES})
+ # Sanitizer flags are not dependend on language, but the used compiler.
+ # So instead of searching flags foreach language, search flags foreach
+ # compiler used.
+ set(COMPILER ${CMAKE_${LANG}_COMPILER_ID})
+ if (NOT DEFINED ${PREFIX}_${COMPILER}_FLAGS)
+ foreach (FLAG ${FLAG_CANDIDATES})
+ if(NOT CMAKE_REQUIRED_QUIET)
+ message(STATUS "Try ${COMPILER} ${NAME} flag = [${FLAG}]")
+ endif()
+
+ set(CMAKE_REQUIRED_FLAGS "${FLAG}")
+ unset(${PREFIX}_FLAG_DETECTED CACHE)
+ sanitizer_check_compiler_flag("${FLAG}" ${LANG}
+ ${PREFIX}_FLAG_DETECTED)
+
+ if (${PREFIX}_FLAG_DETECTED)
+ # If compiler is a GNU compiler, search for static flag, if
+ # SANITIZE_LINK_STATIC is enabled.
+ if (SANITIZE_LINK_STATIC AND (${COMPILER} STREQUAL "GNU"))
+ string(TOLOWER ${PREFIX} PREFIX_lower)
+ sanitizer_check_compiler_flag(
+ "-static-lib${PREFIX_lower}" ${LANG}
+ ${PREFIX}_STATIC_FLAG_DETECTED)
+
+ if (${PREFIX}_STATIC_FLAG_DETECTED)
+ set(FLAG "-static-lib${PREFIX_lower} ${FLAG}")
+ endif ()
+ endif ()
+
+ set(${PREFIX}_${COMPILER}_FLAGS "${FLAG}" CACHE STRING
+ "${NAME} flags for ${COMPILER} compiler.")
+ mark_as_advanced(${PREFIX}_${COMPILER}_FLAGS)
+ break()
+ endif ()
+ endforeach ()
+
+ if (NOT ${PREFIX}_FLAG_DETECTED)
+ set(${PREFIX}_${COMPILER}_FLAGS "" CACHE STRING
+ "${NAME} flags for ${COMPILER} compiler.")
+ mark_as_advanced(${PREFIX}_${COMPILER}_FLAGS)
+
+ message(WARNING "${NAME} is not available for ${COMPILER} "
+ "compiler. Targets using this compiler will be "
+ "compiled without ${NAME}.")
+ endif ()
+ endif ()
+ endforeach ()
+endfunction ()
+
+
+# Helper to assign sanitizer flags for TARGET.
+function (saitizer_add_flags TARGET NAME PREFIX)
+ # Get list of compilers used by target and check, if sanitizer is available
+ # for this target. Other compiler checks like check for conflicting
+ # compilers will be done in add_sanitizers function.
+ sanitizer_target_compilers(${TARGET} TARGET_COMPILER)
+ list(LENGTH TARGET_COMPILER NUM_COMPILERS)
+ if ("${${PREFIX}_${TARGET_COMPILER}_FLAGS}" STREQUAL "")
+ return()
+ endif()
+
+ # Set compile- and link-flags for target.
+ set_property(TARGET ${TARGET} APPEND_STRING
+ PROPERTY COMPILE_FLAGS " ${${PREFIX}_${TARGET_COMPILER}_FLAGS}")
+ set_property(TARGET ${TARGET} APPEND_STRING
+ PROPERTY COMPILE_FLAGS " ${SanBlist_${TARGET_COMPILER}_FLAGS}")
+ set_property(TARGET ${TARGET} APPEND_STRING
+ PROPERTY LINK_FLAGS " ${${PREFIX}_${TARGET_COMPILER}_FLAGS}")
+endfunction ()