37 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// The fuzzer must find several constants with swapped bytes.6#include <cstdint>7#include <cstdio>8#include <cstdlib>9#include <cstring>10 11extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {12 if (Size < 14) return 0;13 uint64_t x = 0;14 uint32_t y = 0;15 uint32_t z = 0;16 memcpy(&x, Data, sizeof(x));17 memcpy(&y, Data + Size / 2, sizeof(y));18 memcpy(&z, Data + Size - sizeof(z), sizeof(z));19 20 x = __builtin_bswap64(x);21 y = __builtin_bswap32(y);22 z = __builtin_bswap32(z);23 const bool k32bit = sizeof(void*) == 4;24 25 if ((k32bit || x == 0x46555A5A5A5A5546ULL) &&26 z == 0x4F4B &&27 y == 0x66757A7A &&28 true29 ) {30 if (Data[Size - 5] == 'z') {31 fprintf(stderr, "BINGO; Found the target\n");32 exit(1);33 }34 }35 return 0;36}37