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1include(CompilerRTUtils)2 3set(SANITIZER_GEN_DYNAMIC_LIST4 ${COMPILER_RT_SOURCE_DIR}/lib/sanitizer_common/scripts/gen_dynamic_list.py)5 6if(CMAKE_NM)7 set(SANITIZER_NM "${CMAKE_NM}")8else()9 set(SANITIZER_NM nm)10endif()11 12# Create a target "<name>-<arch>-symbols" that would generate the list of13# symbols that need to be exported from sanitizer runtime "<name>". Function14# interceptors are exported automatically, user can also provide files with15# symbol names that should be exported as well.16# add_sanitizer_rt_symbols(<name>17# ARCHS <architectures>18# PARENT_TARGET <convenience parent target>19# EXTRA <files with extra symbols to export>)20macro(add_sanitizer_rt_symbols name)21 cmake_parse_arguments(ARG22 ""23 "PARENT_TARGET"24 "ARCHS;EXTRA"25 ${ARGN})26 foreach(arch ${ARG_ARCHS})27 set(target_name ${name}-${arch})28 set(stamp ${CMAKE_CURRENT_BINARY_DIR}/${target_name}.syms-stamp)29 set(extra_args)30 foreach(arg ${ARG_EXTRA})31 list(APPEND extra_args "--extra" ${arg})32 endforeach()33 add_custom_command(OUTPUT ${stamp}34 COMMAND ${Python3_EXECUTABLE}35 ${SANITIZER_GEN_DYNAMIC_LIST} ${extra_args} $<TARGET_FILE:${target_name}>36 --nm-executable "${SANITIZER_NM}" -o $<TARGET_FILE:${target_name}>.syms37 COMMAND ${CMAKE_COMMAND} -E touch ${stamp}38 DEPENDS ${target_name} ${SANITIZER_GEN_DYNAMIC_LIST} ${ARG_EXTRA}39 WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}40 COMMENT "Generating exported symbols for ${target_name}"41 VERBATIM)42 add_custom_target(${target_name}-symbols ALL43 DEPENDS ${stamp}44 SOURCES ${SANITIZER_GEN_DYNAMIC_LIST} ${ARG_EXTRA})45 get_compiler_rt_install_dir(${arch} install_dir)46 install(FILES $<TARGET_FILE:${target_name}>.syms47 DESTINATION ${install_dir})48 if(ARG_PARENT_TARGET)49 add_dependencies(${ARG_PARENT_TARGET} ${target_name}-symbols)50 endif()51 endforeach()52endmacro()53 54# This function is only used on Darwin, where undefined symbols must be specified55# in the linker invocation.56function(add_weak_symbols libname link_flags)57 set(weak_symbols_file "${COMPILER_RT_SOURCE_DIR}/lib/${libname}/weak_symbols.txt")58 file(STRINGS "${weak_symbols_file}" WEAK_SYMBOLS)59 # Add this file as a configure-time dependency so that changes to this60 # file trigger a re-configure. This is necessary so that `${link_flags}`61 # is changed when appropriate.62 set_property(63 DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"64 APPEND65 PROPERTY CMAKE_CONFIGURE_DEPENDS "${weak_symbols_file}")66 set(local_link_flags ${${link_flags}})67 foreach(SYMBOL ${WEAK_SYMBOLS})68 set(local_link_flags ${local_link_flags} -Wl,-U,${SYMBOL})69 endforeach()70 set(${link_flags} ${local_link_flags} PARENT_SCOPE)71endfunction()72 73macro(add_sanitizer_rt_version_list name)74 set(vers ${CMAKE_CURRENT_BINARY_DIR}/${name}.vers)75 cmake_parse_arguments(ARG "" "" "LIBS;EXTRA" ${ARGN})76 set(args)77 foreach(arg ${ARG_EXTRA})78 list(APPEND args "--extra" ${arg})79 endforeach()80 foreach(arg ${ARG_LIBS})81 list(APPEND args "$<TARGET_FILE:${arg}>")82 endforeach()83 add_custom_command(OUTPUT ${vers}84 COMMAND ${Python3_EXECUTABLE}85 ${SANITIZER_GEN_DYNAMIC_LIST} --version-list ${args}86 --nm-executable "${SANITIZER_NM}" -o ${vers}87 DEPENDS ${SANITIZER_GEN_DYNAMIC_LIST} ${ARG_EXTRA} ${ARG_LIBS}88 WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}89 COMMENT "Generating version list for ${name}"90 VERBATIM)91 92 add_custom_target(${name}-version-list ALL93 DEPENDS ${vers})94endmacro()95