compiler-rt/test/fuzzer/BufferOverflowOnInput.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 // Simple test for a fuzzer. The fuzzer must find the string "Hi!".
   6 #include <assert.h>
   7 #include <cstddef>
   8 #include <cstdint>
   9 #include <cstdlib>
  10 #include <iostream>
  11 #include <ostream>
  12
  13 static volatile bool SeedLargeBuffer;
  14
  15 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  16   assert(Data);
  17   if (Size >= 4)
  18     SeedLargeBuffer = true;
  19   if (Size == 3 && SeedLargeBuffer && Data[3]) {
  20     std::cout << "Woops, reading Data[3] w/o crashing\n" << std::flush;
  21     exit(1);
  22   }
  23   return 0;
  24 }
  25