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8b5c81728c
The motivation for this change is to fix linking issues on OSX. However this only partially fixes linking issues (the uninstrumented tests and a few others won't succesfully link yet). This change introduces a struct of function pointers (``fuzzer::ExternalFuntions``) which when initialised will point to the optional functions if they are available. Currently these ``LLVMFuzzerInitialize`` and ``LLVMFuzzerCustomMutator`` functions. Two implementations of ``fuzzer::ExternalFunctions`` constructor are provided one for Linux and one for OSX. The OSX implementation uses ``dlsym()`` because the prior implementation using weak symbols does not work unless the additional flags are passed to the linker. The Linux implementation continues to use weak symbols because the ``dlsym()`` approach does not work unless additional flags are passed to the linker. Differential Revision: http://reviews.llvm.org/D20741 llvm-svn: 271491
38 lines
1.2 KiB
CMake
38 lines
1.2 KiB
CMake
set(LIBFUZZER_FLAGS_BASE "${CMAKE_CXX_FLAGS}")
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# Disable the coverage and sanitizer instrumentation for the fuzzer itself.
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set(CMAKE_CXX_FLAGS "${LIBFUZZER_FLAGS_BASE} -fno-sanitize=all -fno-sanitize-coverage=edge,trace-cmp,indirect-calls,8bit-counters -Werror")
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if( LLVM_USE_SANITIZE_COVERAGE )
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if(NOT "${LLVM_USE_SANITIZER}" STREQUAL "Address")
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message(FATAL_ERROR
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"LibFuzzer and its tests require LLVM_USE_SANITIZER=Address and "
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"LLVM_USE_SANITIZE_COVERAGE=YES to be set."
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)
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endif()
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add_library(LLVMFuzzerNoMainObjects OBJECT
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FuzzerCrossOver.cpp
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FuzzerTraceState.cpp
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FuzzerDriver.cpp
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FuzzerExtFunctionsDlsym.cpp
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FuzzerExtFunctionsWeak.cpp
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FuzzerIO.cpp
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FuzzerLoop.cpp
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FuzzerMutate.cpp
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FuzzerSHA1.cpp
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FuzzerTracePC.cpp
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FuzzerUtil.cpp
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)
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add_library(LLVMFuzzerNoMain STATIC
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$<TARGET_OBJECTS:LLVMFuzzerNoMainObjects>
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)
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target_link_libraries(LLVMFuzzerNoMain ${PTHREAD_LIB})
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add_library(LLVMFuzzer STATIC
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FuzzerMain.cpp
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$<TARGET_OBJECTS:LLVMFuzzerNoMainObjects>
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)
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target_link_libraries(LLVMFuzzer ${PTHREAD_LIB})
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if( LLVM_INCLUDE_TESTS )
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add_subdirectory(test)
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endif()
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endif()
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