[all-commits] [llvm/llvm-project] 15f1d5: [libFuzzer] Add INFO output when LLVMFuzzerCustomM...

[Max Moroz via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 15f1d5d14425528540e1cc4aa776b195a2e1e7e0
      https://github.com/llvm/llvm-project/commit/15f1d5d14425528540e1cc4aa776b195a2e1e7e0
  Author: Max Moroz <mmoroz at chromium.org>
  Date:   2020-01-22 (Wed, 22 Jan 2020)

  Changed paths:
    M compiler-rt/lib/fuzzer/FuzzerDriver.cpp
    M compiler-rt/test/fuzzer/fuzzer-custommutator.test

  Log Message:
  -----------
  [libFuzzer] Add INFO output when LLVMFuzzerCustomMutator is found.

Summary:
there is an ongoing work on interchangeable custom mutators
(https://github.com/google/clusterfuzz/pull/1333/files#r367706283)
and having some sort of signalling from libFuzzer that it has loaded
a custom mutator would be helpful.

The initial idea was to make the mutator to print something, but given
the anticipated variety of different mutators, it does not seem possible
to make all of them print the same message to signal their execution.

Reviewers: kcc, metzman

Reviewed By: metzman

Subscribers: #sanitizers, llvm-commits

Tags: #sanitizers, #llvm

Differential Revision: https://reviews.llvm.org/D73136