freebsd-nq/test/fuzzer/SwapCmpTest.cpp

36 lines
898 B
C++

// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
// The fuzzer must find several constants with swapped bytes.
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
if (Size < 14) return 0;
uint64_t x = 0;
uint32_t y = 0;
uint16_t z = 0;
memcpy(&x, Data, sizeof(x));
memcpy(&y, Data + Size / 2, sizeof(y));
memcpy(&z, Data + Size - sizeof(z), sizeof(z));
x = __builtin_bswap64(x);
y = __builtin_bswap32(y);
z = __builtin_bswap16(z);
const bool k32bit = sizeof(void*) == 4;
if ((k32bit || x == 0x46555A5A5A5A5546ULL) &&
z == 0x4F4B &&
y == 0x66757A7A &&
true
) {
if (Data[Size - 3] == 'z') {
fprintf(stderr, "BINGO; Found the target\n");
exit(1);
}
}
return 0;
}