hanchenye-llvm-project/llvm/tools/llvm-as-fuzzer/CMakeLists.txt

if( LLVM_USE_SANITIZE_COVERAGE )
  set(LLVM_LINK_COMPONENTS
      AsmParser
      BitWriter
      Core
      Support
      )
  add_llvm_tool(llvm-as-fuzzer 
                llvm-as-fuzzer.cpp)
  target_link_libraries(llvm-as-fuzzer
                        LLVMFuzzer
                        )
endif()
Build a lib/Fuzzer version for llvm-as. 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 2015-09-01 01:55:32 +08:00			`if( LLVM_USE_SANITIZE_COVERAGE )`
			`set(LLVM_LINK_COMPONENTS`
			`AsmParser`
			`BitWriter`
			`Core`
			`Support`
			`)`
			`add_llvm_tool(llvm-as-fuzzer`
			`llvm-as-fuzzer.cpp)`
			`target_link_libraries(llvm-as-fuzzer`
			`LLVMFuzzer`
			`)`
			`endif()`