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#.rst:
# ECMEnableSanitizers
# -------------------
#
# Enable compiler sanitizer flags.
#
# The following sanitizers are supported:
#
# - Address Sanitizer
# - Memory Sanitizer
# - Thread Sanitizer
# - Leak Sanitizer
# - Undefined Behaviour Sanitizer
#
# All of them are implemented in Clang, depending on your version, and
# there is an work in progress in GCC, where some of them are currently
# implemented.
#
# This module will check your current compiler version to see if it
# supports the sanitizers that you want to enable
#
# Usage
# =====
#
# Simply add::
#
# include(ECMEnableSanitizers)
#
# to your ``CMakeLists.txt``. Note that this module is included in
# KDECompilerSettings, so projects using that module do not need to also
# include this one.
#
# The sanitizers are not enabled by default. Instead, you must set
# ``ECM_ENABLE_SANITIZERS`` (either in your ``CMakeLists.txt`` or on the
# command line) to a semicolon-separated list of sanitizers you wish to enable.
# The options are:
#
# - address
# - memory
# - thread
# - leak
# - undefined
#
# The sanitizers "address", "memory" and "thread" are mutually exclusive. You
# cannot enable two of them in the same build.
#
# "leak" requires the "address" sanitizer.
#
# .. note::
#
# To reduce the overhead induced by the instrumentation of the sanitizers, it
# is advised to enable compiler optimizations (``-O1`` or higher).
#
# Example
# =======
#
# This is an example of usage::
#
# mkdir build
# cd build
# cmake -DECM_ENABLE_SANITIZERS='address;leak;undefined' ..
#
# .. note::
#
# Most of the sanitizers will require Clang. To enable it, use::
#
# -DCMAKE_CXX_COMPILER=clang++
#
# Since 1.3.0.
#=============================================================================
# Copyright 2014 Mathieu Tarral <mathieu.tarral@gmail.com>
#
# Distributed under the OSI-approved BSD License (the "License");
# see accompanying file COPYING-CMAKE-SCRIPTS for details.
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================
# (To distribute this file outside of extra-cmake-modules, substitute the full
# License text for the above reference.)
# MACRO check_compiler_version
#-----------------------------
macro (check_compiler_version gcc_required_version clang_required_version)
if (
(
CMAKE_CXX_COMPILER_ID MATCHES "GNU"
AND
CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${gcc_required_version}
)
OR
(
CMAKE_CXX_COMPILER_ID MATCHES "Clang"
AND
CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${clang_required_version}
)
)
# error !
message(FATAL_ERROR "You ask to enable the sanitizer ${CUR_SANITIZER},
but your compiler ${CMAKE_CXX_COMPILER_ID} version ${CMAKE_CXX_COMPILER_VERSION}
does not support it !
You should use at least GCC ${gcc_required_version} or Clang ${clang_required_version}
(99.99 means not implemented yet)")
endif ()
endmacro ()
# MACRO check_compiler_support
#------------------------------
macro (enable_sanitizer_flags sanitize_option)
if (${sanitize_option} MATCHES "address")
check_compiler_version("4.8" "3.1")
set(XSAN_COMPILE_FLAGS "-fsanitize=address -fno-omit-frame-pointer -fno-optimize-sibling-calls")
set(XSAN_LINKER_FLAGS "asan")
elseif (${sanitize_option} MATCHES "thread")
check_compiler_version("4.8" "3.1")
set(XSAN_COMPILE_FLAGS "-fsanitize=thread")
set(XSAN_LINKER_FLAGS "tsan")
elseif (${sanitize_option} MATCHES "memory")
check_compiler_version("99.99" "3.1")
set(XSAN_COMPILE_FLAGS "-fsanitize=memory")
elseif (${sanitize_option} MATCHES "leak")
check_compiler_version("4.9" "3.4")
set(XSAN_COMPILE_FLAGS "-fsanitize=leak")
set(XSAN_LINKER_FLAGS "lsan")
elseif (${sanitize_option} MATCHES "undefined")
check_compiler_version("4.9" "3.1")
set(XSAN_COMPILE_FLAGS "-fsanitize=undefined -fno-omit-frame-pointer -fno-optimize-sibling-calls")
else ()
message(FATAL_ERROR "Compiler sanitizer option \"${sanitize_option}\" not supported.")
endif ()
endmacro ()
# for each element of the ECM_ENABLE_SANITIZERS list
foreach ( CUR_SANITIZER ${ECM_ENABLE_SANITIZERS} )
# lowercase filter
string(TOLOWER ${CUR_SANITIZER} CUR_SANITIZER)
# check option and enable appropriate flags
enable_sanitizer_flags ( ${CUR_SANITIZER} )
set( CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${XSAN_COMPILE_FLAGS}" )
if(CMAKE_CXX_COMPILER_ID MATCHES "GNU")
link_libraries(${XSAN_LINKER_FLAGS})
endif()
if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
string(REPLACE "-Wl,--no-undefined" "" CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS}")
string(REPLACE "-Wl,--no-undefined" "" CMAKE_MODULE_LINKER_FLAGS "${CMAKE_MODULE_LINKER_FLAGS}")
endif ()
endforeach ()
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