llvm/lib/Fuzzer/test/EquivalenceBTest.cpp


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// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>

// Test for libFuzzer's "equivalence" fuzzing, part B.
extern "C" void LLVMFuzzerAnnounceOutput(const uint8_t *Data, size_t Size);
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  if (Size > 100) return 0;
  uint8_t Result[100];
  for (size_t i = 0; i < Size; i++)
    Result[Size - i - 1] = Data[i];

  // Be a bit different from EquivalenceATest
  if (Size > 42 && Data[10] == 'B') {
    static int c;
    if (!c)
      fprintf(stderr, "ZZZZZZZ\n");
    c = 1;
    Result[42]++;
  }

  LLVMFuzzerAnnounceOutput(Result, Size);
  return 0;
}