compiler-rt/test/fuzzer/Reject.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 // Tests how the fuzzer rejects inputs if the target returns -1.
   6 #include <cstddef>
   7 #include <cstdint>
   8
   9 static volatile int Sink;
  10
  11 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  12   if (Size != 3)
  13     return -1; // Reject anyting that's not 3 bytes long.
  14   // Reject 'rej'.
  15   if (Data[0] == 'r' && Data[1] == 'e' && Data[2] == 'j')
  16     return -1;
  17   // Accept 'acc'.
  18   if (Data[0] == 'a' && Data[1] == 'c' && Data[2] == 'c') {
  19     Sink = 1;
  20     return 0;
  21   }
  22   return 0;
  23 }