| Kostya Serebryany | dfbe59b | 2016-08-15 17:48:28 +0000 | [diff] [blame^] | 1 | // This file is distributed under the University of Illinois Open Source |
| 2 | // License. See LICENSE.TXT for details. |
| 3 | |
| 4 | // Simple test for a fuzzer. The fuzzer must find repeated bytes. |
| 5 | #include <assert.h> |
| 6 | #include <cstdint> |
| 7 | #include <cstdlib> |
| 8 | #include <cstddef> |
| 9 | #include <iostream> |
| 10 | |
| 11 | extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { |
| 12 | assert(Data); |
| 13 | // Looking for AAAAAAAAAAAAAAAAAAAAAA or some such. |
| 14 | size_t CurA = 0, MaxA = 0; |
| 15 | for (size_t i = 0; i < Size; i++) { |
| 16 | // Make sure there are no conditionals in the loop so that |
| 17 | // coverage can't help the fuzzer. |
| 18 | int EQ = Data[i] == 'A'; |
| 19 | CurA = EQ * (CurA + 1); |
| 20 | int GT = CurA > MaxA; |
| 21 | MaxA = GT * CurA + (!GT) * MaxA; |
| 22 | } |
| 23 | if (MaxA >= 20) { |
| 24 | std::cout << "BINGO; Found the target (Max: " << MaxA << "), exiting\n"; |
| 25 | exit(0); |
| 26 | } |
| 27 | return 0; |
| 28 | } |
| 29 | |