110ab2aceSGeorge Karpenkov // This file is distributed under the University of Illinois Open Source 210ab2aceSGeorge Karpenkov // License. See LICENSE.TXT for details. 310ab2aceSGeorge Karpenkov 410ab2aceSGeorge Karpenkov // The fuzzer must find several constants with swapped bytes. 510ab2aceSGeorge Karpenkov #include <cstdint> 610ab2aceSGeorge Karpenkov #include <cstdio> 710ab2aceSGeorge Karpenkov #include <cstdlib> 810ab2aceSGeorge Karpenkov #include <cstring> 910ab2aceSGeorge Karpenkov 1010ab2aceSGeorge Karpenkov extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { 1110ab2aceSGeorge Karpenkov if (Size < 14) return 0; 1210ab2aceSGeorge Karpenkov uint64_t x = 0; 1310ab2aceSGeorge Karpenkov uint32_t y = 0; 14*5317f2e4SMatt Morehouse uint32_t z = 0; 1510ab2aceSGeorge Karpenkov memcpy(&x, Data, sizeof(x)); 1610ab2aceSGeorge Karpenkov memcpy(&y, Data + Size / 2, sizeof(y)); 1710ab2aceSGeorge Karpenkov memcpy(&z, Data + Size - sizeof(z), sizeof(z)); 1810ab2aceSGeorge Karpenkov 1910ab2aceSGeorge Karpenkov x = __builtin_bswap64(x); 2010ab2aceSGeorge Karpenkov y = __builtin_bswap32(y); 21*5317f2e4SMatt Morehouse z = __builtin_bswap32(z); 2210ab2aceSGeorge Karpenkov const bool k32bit = sizeof(void*) == 4; 2310ab2aceSGeorge Karpenkov 2410ab2aceSGeorge Karpenkov if ((k32bit || x == 0x46555A5A5A5A5546ULL) && 2510ab2aceSGeorge Karpenkov z == 0x4F4B && 2610ab2aceSGeorge Karpenkov y == 0x66757A7A && 2710ab2aceSGeorge Karpenkov true 2810ab2aceSGeorge Karpenkov ) { 29*5317f2e4SMatt Morehouse if (Data[Size - 5] == 'z') { 3010ab2aceSGeorge Karpenkov fprintf(stderr, "BINGO; Found the target\n"); 3110ab2aceSGeorge Karpenkov exit(1); 3210ab2aceSGeorge Karpenkov } 3310ab2aceSGeorge Karpenkov } 3410ab2aceSGeorge Karpenkov return 0; 3510ab2aceSGeorge Karpenkov } 36