compiler-rt/test/fuzzer/StrncmpTest.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 static volatile int sink;
  12
  13 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  14   // TODO: check other sizes.
  15   const char *S = (const char*)Data;
  16   if (Size >= 8 && strncmp(S, "123", 8))
  17     sink = 1;
  18   if (Size >= 8 && strncmp(S, "01234567", 8) == 0) {
  19     if (Size >= 12 && strncmp(S + 8, "ABCD", 4) == 0) {
  20       if (Size >= 14 && strncmp(S + 12, "XY", 2) == 0) {
  21         if (Size >= 17 && strncmp(S + 14, "KLM", 3) == 0) {
  22           fprintf(stderr, "BINGO\n");
  23           exit(1);
  24         }
  25       }
  26     }
  27   }
  28   return 0;
  29 }