compiler-rt/test/fuzzer/KeepSeedTest.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 whether the fuzzer can find "SELECT FROM WHERE", given a seed input
   6 // "SELECTxFROMxWHERE". Without -keep_seed=1, it takes longer time to trigger
   7 // find the desired string, because the seed input is more likely to be reduced
   8 // to a prefix of the given input first, losing useful fragments towards the end
   9 // of the seed input.
  10 #include <cstdint>
  11 #include <cstdio>
  12 #include <cstdlib>
  13 #include <cstring>
  14
  15 static volatile int Sink = 0;
  16
  17 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  18   if (Size > 17)
  19     return 0;
  20
  21   if (Size >= 6 && Data[0] == 'S' && Data[1] == 'E' && Data[2] == 'L' &&
  22       Data[3] == 'E' && Data[4] == 'C' && Data[5] == 'T') {
  23     if (Size >= 7 && Data[6] == ' ') {
  24       if (Size >= 11 && Data[7] == 'F' && Data[8] == 'R' && Data[9] == 'O' &&
  25           Data[10] == 'M') {
  26         if (Size >= 12 && Data[11] == ' ') {
  27           if (Size >= 17 && Data[12] == 'W' && Data[13] == 'H' &&
  28               Data[14] == 'E' && Data[15] == 'R' && Data[16] == 'E') {
  29             fprintf(stderr, "BINGO; Found the target, exiting.\n");
  30             exit(1);
  31           }
  32         }
  33       }
  34     }
  35   }
  36   return 0;
  37 }