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# detect-sanitizer.cmake -- Detect supported compiler sanitizer flags
# Licensed under the Zlib license, see LICENSE.md for details
macro(add_common_sanitizer_flags)
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
add_compile_options(-g3)
endif()
check_c_compiler_flag(-fno-omit-frame-pointer HAVE_NO_OMIT_FRAME_POINTER)
if(HAVE_NO_OMIT_FRAME_POINTER)
add_compile_options(-fno-omit-frame-pointer)
add_link_options(-fno-omit-frame-pointer)
endif()
check_c_compiler_flag(-fno-optimize-sibling-calls HAVE_NO_OPTIMIZE_SIBLING_CALLS)
if(HAVE_NO_OPTIMIZE_SIBLING_CALLS)
add_compile_options(-fno-optimize-sibling-calls)
add_link_options(-fno-optimize-sibling-calls)
endif()
endmacro()
macro(check_sanitizer_support known_checks supported_checks)
set(available_checks "")
# Build list of supported sanitizer flags by incrementally trying compilation with
# known sanitizer checks
foreach(check ${known_checks})
if(available_checks STREQUAL "")
set(compile_checks "${check}")
else()
set(compile_checks "${available_checks},${check}")
endif()
set(CMAKE_REQUIRED_FLAGS -fsanitize=${compile_checks})
check_c_source_compiles("int main() { return 0; }" HAVE_SANITIZER_${check}
FAIL_REGEX "not supported|unrecognized command|unknown option")
set(CMAKE_REQUIRED_FLAGS)
if(HAVE_SANITIZER_${check})
set(available_checks ${compile_checks})
endif()
endforeach()
set(${supported_checks} ${available_checks})
endmacro()
macro(add_address_sanitizer)
set(known_checks
address
pointer-compare
pointer-subtract
)
check_sanitizer_support("${known_checks}" supported_checks)
if(NOT ${supported_checks} STREQUAL "")
message(STATUS "Address sanitizer is enabled: ${supported_checks}")
add_compile_options(-fsanitize=${supported_checks})
add_link_options(-fsanitize=${supported_checks})
add_common_sanitizer_flags()
else()
message(STATUS "Address sanitizer is not supported")
endif()
if(CMAKE_CROSSCOMPILING_EMULATOR)
# Only check for leak sanitizer if not cross-compiling due to qemu crash
message(WARNING "Leak sanitizer is not supported when cross compiling")
else()
# Leak sanitizer requires address sanitizer
check_sanitizer_support("leak" supported_checks)
if(NOT ${supported_checks} STREQUAL "")
message(STATUS "Leak sanitizer is enabled: ${supported_checks}")
add_compile_options(-fsanitize=${supported_checks})
add_link_options(-fsanitize=${supported_checks})
add_common_sanitizer_flags()
else()
message(STATUS "Leak sanitizer is not supported")
endif()
endif()
endmacro()
macro(add_memory_sanitizer)
check_sanitizer_support("memory" supported_checks)
if(NOT ${supported_checks} STREQUAL "")
message(STATUS "Memory sanitizer is enabled: ${supported_checks}")
add_compile_options(-fsanitize=${supported_checks})
add_link_options(-fsanitize=${supported_checks})
add_common_sanitizer_flags()
check_c_compiler_flag(-fsanitize-memory-track-origins HAVE_MEMORY_TRACK_ORIGINS)
if(HAVE_MEMORY_TRACK_ORIGINS)
add_compile_options(-fsanitize-memory-track-origins)
add_link_options(-fsanitize-memory-track-origins)
endif()
else()
message(STATUS "Memory sanitizer is not supported")
endif()
endmacro()
macro(add_thread_sanitizer)
check_sanitizer_support("thread" supported_checks)
if(NOT ${supported_checks} STREQUAL "")
message(STATUS "Thread sanitizer is enabled: ${supported_checks}")
add_compile_options(-fsanitize=${supported_checks})
add_link_options(-fsanitize=${supported_checks})
add_common_sanitizer_flags()
else()
message(STATUS "Thread sanitizer is not supported")
endif()
endmacro()
macro(add_undefined_sanitizer)
set(known_checks
alignment
array-bounds
bool
bounds
builtin
enum
float-cast-overflow
float-divide-by-zero
function
integer-divide-by-zero
local-bounds
null
nonnull-attribute
pointer-overflow
return
returns-nonnull-attribute
shift
shift-base
shift-exponent
signed-integer-overflow
undefined
unsigned-integer-overflow
unsigned-shift-base
vla-bound
vptr
)
# Object size sanitizer has no effect at -O0 and produces compiler warning if enabled
if(NOT CMAKE_C_FLAGS MATCHES "-O0")
list(APPEND known_checks object-size)
endif()
check_sanitizer_support("${known_checks}" supported_checks)
if(NOT ${supported_checks} STREQUAL "")
message(STATUS "Undefined behavior sanitizer is enabled: ${supported_checks}")
add_compile_options(-fsanitize=${supported_checks})
add_link_options(-fsanitize=${supported_checks})
add_common_sanitizer_flags()
else()
message(STATUS "Undefined behavior sanitizer is not supported")
endif()
endmacro()
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