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c9db4d6473
Summary: This CL is associated with a fuzzing effort to find bugs in LLVM. The first step is to fuzz llvm-as to find potential issues in generating IR. Both afl-fuzz and LLVM's lib/Fuzzer are being used. This CL introduces the executable that implements the in-process fuzzer using LLVM's lib/Fuzzer. The motivation for using lib/Fuzzer is based on time comparisons between afl-fuzz and lib/Fuzzer. Early results show that per-process, the lib/Fuzzer implemenation of llvm-as (i.e. this CL) generates over 30 times the number of mutations found by afl-fuzz, per hour runtime. The speedup is due to the removal of overhead of forking a process, and loading the executable into memory. I placed this under the tools directory, since it is an executable. It is also only conditionally built if (using cmake) the flag LLVM_USEE_SANITIZE_COVERAGE is used, so that it isn't built by default. Reviewers: kcc, filcab Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D12438 llvm-svn: 246458
14 lines
301 B
CMake
14 lines
301 B
CMake
if( LLVM_USE_SANITIZE_COVERAGE )
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set(LLVM_LINK_COMPONENTS
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AsmParser
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BitWriter
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Core
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Support
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)
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add_llvm_tool(llvm-as-fuzzer
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llvm-as-fuzzer.cpp)
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target_link_libraries(llvm-as-fuzzer
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LLVMFuzzer
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)
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endif()
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