2 Commits

Author	SHA1	Message	Date
Kostya Serebryany	9906eefc84	[libFuzzer] make LLVMFuzzerTestOneInput (the fuzzer target function) return int instead of void. The actual return value is not *yet* used (and expected to be 0). This change is API breaking, so the fuzzers will need to be updated. ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@249214 91177308-0d34-0410-b5e6-96231b3b80d8	2015-10-02 23:34:06 +00:00
Karl Schimpf	1318d71a75	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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246458 91177308-0d34-0410-b5e6-96231b3b80d8	2015-08-31 17:55:32 +00:00