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sanitize-helpers.cmake
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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(LONGEST_EXT "${FILE}" EXT)
# If extension is empty return. This can happen for extensionless headers
if("${LONGEST_EXT}" STREQUAL "")
set(${RETURN_VAR} "" PARENT_SCOPE)
return()
endif()
# Get shortest extension as some files can have dot in their names
string(REGEX REPLACE "^.*(\\.[^.]+)$" "\\1" FILE_EXT ${LONGEST_EXT})
string(TOLOWER "${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 (COMPILER AND 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 ${NAME}.")
endif ()
endif ()
endforeach ()
endfunction ()
# Helper to assign sanitizer flags for TARGET.
function (sanitizer_add_flags TARGET NAME PREFIX)
# Get list of compilers used by target and check, if sanitizer is available
# for this target. Other compiler checks like check for conflicting
# compilers will be done in add_sanitizers function.
sanitizer_target_compilers(${TARGET} TARGET_COMPILER)
list(LENGTH TARGET_COMPILER NUM_COMPILERS)
if ("${${PREFIX}_${TARGET_COMPILER}_FLAGS}" STREQUAL "")
return()
endif()
separate_arguments(flags_list UNIX_COMMAND "${${PREFIX}_${TARGET_COMPILER}_FLAGS} ${SanBlist_${TARGET_COMPILER}_FLAGS}")
target_compile_options(${TARGET} PUBLIC ${flags_list})
separate_arguments(flags_list UNIX_COMMAND "${${PREFIX}_${TARGET_COMPILER}_FLAGS}")
target_link_options(${TARGET} PUBLIC ${flags_list})
endfunction ()