LLVM  4.0.0
SwapCmpTest.cpp
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1 // This file is distributed under the University of Illinois Open Source
2 // License. See LICENSE.TXT for details.
3 
4 // The fuzzer must find several constants with swapped bytes.
5 #include <cstdint>
6 #include <cstdlib>
7 #include <cstring>
8 #include <cstdio>
9 
10 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
11  if (Size < 14) return 0;
12  uint64_t x = 0;
13  uint32_t y = 0;
14  uint16_t z = 0;
15  memcpy(&x, Data, sizeof(x));
16  memcpy(&y, Data + Size / 2, sizeof(y));
17  memcpy(&z, Data + Size - sizeof(z), sizeof(z));
18 
19  x = __builtin_bswap64(x);
20  y = __builtin_bswap32(y);
21  z = __builtin_bswap16(z);
22 
23  if (x == 0x46555A5A5A5A5546ULL &&
24  z == 0x4F4B &&
25  y == 0x66757A7A &&
26  true
27  ) {
28  if (Data[Size - 3] == 'z') {
29  fprintf(stderr, "BINGO; Found the target\n");
30  exit(1);
31  }
32  }
33  return 0;
34 }
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
Definition: SwapCmpTest.cpp:10