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[libc++abi] Build cxxabi with sanitizers #119612

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Merged
merged 2 commits into from
Dec 13, 2024
Merged

[libc++abi] Build cxxabi with sanitizers #119612

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a73451a
[𝘀𝗽𝗿] initial version
vitalybuka Dec 11, 2024
7722bd0
Merge branch 'main' into users/vitalybuka/spr/libcabi-build-cxxabi-wi…
vitalybuka Dec 12, 2024
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43 changes: 43 additions & 0 deletions libcxxabi/CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -259,6 +259,49 @@ if (CXX_SUPPORTS_NOSTDINCXX_FLAG)
string(REPLACE "-stdlib=libstdc++" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}")
endif()

function(get_sanitizer_flags OUT_VAR USE_SANITIZER)
set(SANITIZER_FLAGS)
set(USE_SANITIZER "${USE_SANITIZER}")
# NOTE: LLVM_USE_SANITIZER checks for a UNIX like system instead of MSVC.
# But we don't have LLVM_ON_UNIX so checking for MSVC is the best we can do.
if (USE_SANITIZER AND NOT MSVC)
append_flags_if_supported(SANITIZER_FLAGS "-fno-omit-frame-pointer")
append_flags_if_supported(SANITIZER_FLAGS "-gline-tables-only")

if (NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "DEBUG" AND
NOT uppercase_CMAKE_BUILD_TYPE STREQUAL "RELWITHDEBINFO")
append_flags_if_supported(SANITIZER_FLAGS "-gline-tables-only")
endif()
if (USE_SANITIZER STREQUAL "Address")
append_flags(SANITIZER_FLAGS "-fsanitize=address")
elseif (USE_SANITIZER STREQUAL "HWAddress")
append_flags(SANITIZER_FLAGS "-fsanitize=hwaddress")
elseif (USE_SANITIZER MATCHES "Memory(WithOrigins)?")
append_flags(SANITIZER_FLAGS -fsanitize=memory)
if (USE_SANITIZER STREQUAL "MemoryWithOrigins")
append_flags(SANITIZER_FLAGS "-fsanitize-memory-track-origins")
endif()
elseif (USE_SANITIZER STREQUAL "Undefined")
append_flags(SANITIZER_FLAGS "-fsanitize=undefined" "-fno-sanitize=vptr,function" "-fno-sanitize-recover=all")
elseif (USE_SANITIZER STREQUAL "Address;Undefined" OR
USE_SANITIZER STREQUAL "Undefined;Address")
append_flags(SANITIZER_FLAGS "-fsanitize=address,undefined" "-fno-sanitize=vptr,function" "-fno-sanitize-recover=all")
elseif (USE_SANITIZER STREQUAL "Thread")
append_flags(SANITIZER_FLAGS -fsanitize=thread)
elseif (USE_SANITIZER STREQUAL "DataFlow")
append_flags(SANITIZER_FLAGS -fsanitize=dataflow)
else()
message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${USE_SANITIZER}")
endif()
elseif(USE_SANITIZER AND MSVC)
message(WARNING "LLVM_USE_SANITIZER is not supported on this platform.")
endif()
set(${OUT_VAR} "${SANITIZER_FLAGS}" PARENT_SCOPE)
endfunction()

get_sanitizer_flags(SANITIZER_FLAGS "${LLVM_USE_SANITIZER}")
list(APPEND LIBCXXABI_COMPILE_FLAGS ${SANITIZER_FLAGS})

# Let the library headers know they are currently being used to build the
# library.
add_definitions(-D_LIBCXXABI_BUILDING_LIBRARY)
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