compiler-rt/test/fuzzer/CounterTest.cpp

   1 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   2 // See https://llvm.org/LICENSE.txt for license information.
   3 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   4
   5 // Test for a fuzzer: must find the case where a particular basic block is
   6 // executed many times.
   7 #include <cstdint>
   8 #include <iostream>
   9
  10 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  11   int Num = 0;
  12   for (size_t i = 0; i < Size; i++)
  13     if (Data[i] == 'A' + i)
  14       Num++;
  15   if (Num >= 4) {
  16     std::cerr <<  "BINGO!\n";
  17     exit(1);
  18   }
  19   return 0;
  20 }