From: Kostya Serebryany <kcc@google.com>
Date: Wed, 15 Mar 2017 23:54:40 +0000 (+0000)
Subject: [libFuzzer] add a dummy LLVMFuzzerMutate to afl/afl_driver.cpp (https://github.com... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e79427160e7786445bfcd58ba68802316fe5cef0;p=llvm

[libFuzzer] add a dummy LLVMFuzzerMutate to afl/afl_driver.cpp (https://github.com/google/oss-fuzz/issues/460)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297919 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Fuzzer/afl/afl_driver.cpp b/lib/Fuzzer/afl/afl_driver.cpp
index fc9589552ba..b3a54e57fce 100644
--- a/lib/Fuzzer/afl/afl_driver.cpp
+++ b/lib/Fuzzer/afl/afl_driver.cpp
@@ -238,6 +238,13 @@ static void maybe_duplicate_stderr() {
   }
 }
 
+// Define LLVMFuzzerMutate to avoid link failures for targets that use it
+// with libFuzzer's LLVMFuzzerCustomMutator.
+extern "C" size_t LLVMFuzzerMutate(uint8_t *Data, size_t Size, size_t MaxSize) {
+  assert(false && "LLVMFuzzerMutate should not be called from afl_driver");
+  return 0;
+}
+
 int main(int argc, char **argv) {
   fprintf(stderr, "======================= INFO =========================\n"
                   "This binary is built for AFL-fuzz.\n"