LLVM  4.0.0
RepeatedBytesTest.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 // 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 
size_t i
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
#define EQ(a, b)
Definition: regexec.c:112
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())