File: RepeatedBytesTest.cpp

package info (click to toggle)
llvm-toolchain-20 1%3A20.1.8-1~exp1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 2,111,388 kB
  • sloc: cpp: 7,438,767; ansic: 1,393,871; asm: 1,012,926; python: 241,728; f90: 86,635; objc: 75,411; lisp: 42,144; pascal: 17,286; sh: 10,027; ml: 5,082; perl: 4,730; awk: 3,523; makefile: 3,349; javascript: 2,251; xml: 892; fortran: 672
file content (32 lines) | stat: -rw-r--r-- 979 bytes parent folder | download | duplicates (38) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
 
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

// Simple test for a fuzzer. The fuzzer must find repeated bytes.
#include <assert.h>
#include <cstddef>
#include <cstdint>
#include <cstdlib>
#include <iostream>
#include <ostream>

extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  assert(Data);
  // Looking for AAAAAAAAAAAAAAAAAAAAAA or some such.
  size_t CurA = 0, MaxA = 0;
  for (size_t i = 0; i < Size; i++) {
    // Make sure there are no conditionals in the loop so that
    // coverage can't help the fuzzer.
    int EQ = Data[i] == 'A';
    CurA = EQ * (CurA + 1);
    int GT = CurA > MaxA;
    MaxA = GT * CurA + (!GT) * MaxA;
  }
  if (MaxA >= 20) {
    std::cout << "BINGO; Found the target (Max: " << MaxA << "), exiting\n"
              << std::flush;
    exit(0);
  }
  return 0;
}