lib/Fuzzer/test/EquivalenceBTest.cpp

// 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) {
  // fprintf(stderr, "B %zd\n", Size);
  uint8_t Result[50];
  if (Size > 50) Size = 50;
  for (size_t i = 0; i < Size; i++)
    Result[Size - i - 1] = Data[i];

  // Be a bit different from EquivalenceATest
  if (Size > 10 && Data[5] == 'B' && Data[6] == 'C' && Data[7] == 'D') {
    static int c;
    if (!c)
      fprintf(stderr, "ZZZZZZZ\n");
    c = 1;
    Result[2]++;
  }

  LLVMFuzzerAnnounceOutput(Result, Size);
  return 0;
}