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a3e4fd51f1
The original `ExecuteCommand()` called `system()` from the C library. The C library implementation of this on macOS contains a mutex which serializes calls to `system()`. This prevented the `-jobs=` flag from running copies of the fuzzing binary in parallel which is the opposite of what is intended. To fix this on macOS an alternative implementation of `ExecuteCommand()` is provided that can be used concurrently. This is provided in `FuzzerUtilDarwin.cpp` which is guarded to only compile code on Apple platforms. The existing implementation has been moved to a new file `FuzzerUtilLinux.cpp` which is guarded to only compile code on Linux. This commit includes a simple test to check that LibFuzzer is being executed in parallel when requested. Differential Revision: https://reviews.llvm.org/D22742 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@278544 91177308-0d34-0410-b5e6-96231b3b80d8
40 lines
1.2 KiB
CMake
40 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 "${LLVM_USE_SANITIZER}" STREQUAL "Address")
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message(FATAL_ERROR
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"LibFuzzer and its tests require LLVM_USE_SANITIZER=Address and "
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"LLVM_USE_SANITIZE_COVERAGE=YES to be set."
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)
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endif()
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add_library(LLVMFuzzerNoMainObjects OBJECT
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FuzzerCrossOver.cpp
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FuzzerTraceState.cpp
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FuzzerDriver.cpp
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FuzzerExtFunctionsDlsym.cpp
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FuzzerExtFunctionsWeak.cpp
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FuzzerIO.cpp
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FuzzerLoop.cpp
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FuzzerMutate.cpp
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FuzzerSHA1.cpp
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FuzzerTracePC.cpp
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FuzzerUtil.cpp
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FuzzerUtilDarwin.cpp
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FuzzerUtilLinux.cpp
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)
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add_library(LLVMFuzzerNoMain STATIC
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$<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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