3 Commits

Author SHA1 Message Date
Justin Bogner
16edf9bff8 Move some CLI utils out of llvm-isel-fuzzer and into the library
FuzzMutate might not be the best place for these, but it makes more
sense than an entirely new library for now. This will make setting up
fuzz targets with consistent CLI handling easier.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312425 91177308-0d34-0410-b5e6-96231b3b80d8
2017-09-02 23:43:04 +00:00
Justin Bogner
f2de8c1c55 llvm-isel-fuzzer: Weak function invoke the ire of PE/COFF
It's non-trivial to use weak symbols in a cross platform way (See
sanitizer_win_defs.h in compiler-rt), and doing it naively like we
have here causes some build failures:

  http://lab.llvm.org:8011/builders/clang-with-thin-lto-windows/builds/1260

Instead of going down the rabbit hole of emulating weak symbols for
this very trivial dummy fuzzer driver, we can just rely on the fact
that we know which hooks any given fuzz target implements and forward
declare a normal symbol.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312354 91177308-0d34-0410-b5e6-96231b3b80d8
2017-09-01 19:37:49 +00:00
Justin Bogner
8cb6b3ebf8 llvm-isel-fuzzer: Make buildable and testable without libFuzzer
This adds a dummy main so we can build and run the llvm-isel-fuzzer
functionality when we aren't building LLVM with coverage. The approach
here should serve as a template to stop in-tree fuzzers from
bitrotting (See llvm.org/pr34314).

Note that I'll probably move most of the logic in DummyISelFuzzer's
`main` to a library so it's easy to reuse it in other fuzz targets,
but I'm planning on doing that in a follow up that also consolidates
argument handling in our LLVMFuzzerInitialize implementations.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@312338 91177308-0d34-0410-b5e6-96231b3b80d8
2017-09-01 17:02:22 +00:00