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# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
# SPDX-License-Identifier: Apache-2.0.
include(CheckCCompilerFlag)
option(ENABLE_SANITIZERS "Enable sanitizers in debug builds" OFF)
set(SANITIZERS "address;undefined" CACHE STRING "List of sanitizers to build with")
# This function checks if a sanitizer is available
# Options:
# sanitizer: The sanitizer to check
# out_variable: The variable to assign the result to. Defaults to HAS_SANITIZER_${sanitizer}
function(aws_check_sanitizer sanitizer)
if(NOT ${ARGN})
set(out_variable "${ARGN}")
else()
set(out_variable HAS_SANITIZER_${sanitizer})
# Sanitize the variable name to remove illegal characters
string(MAKE_C_IDENTIFIER ${out_variable} out_variable)
endif()
if(ENABLE_SANITIZERS)
# When testing for libfuzzer, if attempting to link there will be 2 mains
if(${sanitizer} STREQUAL "fuzzer")
set(sanitizer_test_flag -fsanitize=fuzzer-no-link)
else()
set(sanitizer_test_flag -fsanitize=${sanitizer})
endif()
# Need to set this here so that the flag is passed to the linker
set(CMAKE_REQUIRED_FLAGS ${sanitizer_test_flag})
check_c_compiler_flag(${sanitizer_test_flag} ${out_variable})
else()
set(${out_variable} 0 PARENT_SCOPE)
endif()
endfunction()
# This function enables sanitizers on the given target
# Options:
# SANITIZERS: The list of extra sanitizers to enable
# BLACKLIST: The blacklist file to use (passed to -fsanitizer-blacklist=)
function(aws_add_sanitizers target)
set(oneValueArgs BLACKLIST)
set(multiValueArgs SANITIZERS)
cmake_parse_arguments(SANITIZER "" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
check_c_compiler_flag(-fsanitize= HAS_SANITIZERS)
if(HAS_SANITIZERS)
list(APPEND SANITIZER_SANITIZERS ${SANITIZERS})
message(STATUS "attempting to use sanitizer list ${SANITIZER_SANITIZERS}")
foreach(sanitizer IN LISTS SANITIZER_SANITIZERS)
set(sanitizer_variable HAS_SANITIZER_${sanitizer})
# Sanitize the variable name to remove illegal characters
string(MAKE_C_IDENTIFIER ${sanitizer_variable} sanitizer_variable)
aws_check_sanitizer(${sanitizer} ${sanitizer_variable})
if(${${sanitizer_variable}})
set(PRESENT_SANITIZERS "${PRESENT_SANITIZERS},${sanitizer}")
endif()
endforeach()
if(PRESENT_SANITIZERS)
target_compile_options(${target} PRIVATE -fno-omit-frame-pointer -fsanitize=${PRESENT_SANITIZERS})
target_link_libraries(${target} PUBLIC "-fno-omit-frame-pointer -fsanitize=${PRESENT_SANITIZERS}")
if(SANITIZER_BLACKLIST)
target_compile_options(${target} PRIVATE -fsanitize-blacklist=${CMAKE_CURRENT_SOURCE_DIR}/${SANITIZER_BLACKLIST})
endif()
string(REPLACE "," ";" PRESENT_SANITIZERS "${PRESENT_SANITIZERS}")
set(${target}_SANITIZERS ${PRESENT_SANITIZERS} PARENT_SCOPE)
endif()
endif()
endfunction()
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