compiler-rt/test/fuzzer/MemcmpTest.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 a particular string.
   6 #include <cstdint>
   7 #include <cstdio>
   8 #include <cstdlib>
   9 #include <cstring>
  10
  11 #ifndef MEMCMP
  12 # define MEMCMP memcmp
  13 #endif
  14
  15 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  16   // TODO: check other sizes.
  17   if (Size >= 8 && MEMCMP(Data, "01234567", 8) == 0) {
  18     if (Size >= 12 && MEMCMP(Data + 8, "ABCD", 4) == 0) {
  19       if (Size >= 14 && MEMCMP(Data + 12, "XY", 2) == 0) {
  20         if (Size >= 17 && MEMCMP(Data + 14, "KLM", 3) == 0) {
  21           if (Size >= 27 && MEMCMP(Data + 17, "ABCDE-GHIJ", 10) == 0){
  22             fprintf(stderr, "BINGO %zd\n", Size);
  23             for (size_t i = 0; i < Size; i++) {
  24               uint8_t C = Data[i];
  25               if (C >= 32 && C < 127)
  26                 fprintf(stderr, "%c", C);
  27             }
  28             fprintf(stderr, "\n");
  29             exit(1);
  30           }
  31         }
  32       }
  33     }
  34   }
  35   return 0;
  36 }