33 lines · cpp
1// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.2// See https://llvm.org/LICENSE.txt for license information.3// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception4 5// Simple test for a fuzzer. The fuzzer must find repeated bytes.6#include <assert.h>7#include <cstddef>8#include <cstdint>9#include <cstdlib>10#include <iostream>11#include <ostream>12 13extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {14 assert(Data);15 // Looking for AAAAAAAAAAAAAAAAAAAAAA or some such.16 size_t CurA = 0, MaxA = 0;17 for (size_t i = 0; i < Size; i++) {18 // Make sure there are no conditionals in the loop so that19 // coverage can't help the fuzzer.20 int EQ = Data[i] == 'A';21 CurA = EQ * (CurA + 1);22 int GT = CurA > MaxA;23 MaxA = GT * CurA + (!GT) * MaxA;24 }25 if (MaxA >= 20) {26 std::cout << "BINGO; Found the target (Max: " << MaxA << "), exiting\n"27 << std::flush;28 exit(0);29 }30 return 0;31}32 33