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| // 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;
}
|