src/libcompiler_builtins/compiler-rt/test/fuzzer/StrncmpTest.cpp

   1 // This file is distributed under the University of Illinois Open Source
   2 // License. See LICENSE.TXT for details.
   3
   4 // Simple test for a fuzzer. The fuzzer must find a particular string.
   5 #include <cstdint>
   6 #include <cstdio>
   7 #include <cstdlib>
   8 #include <cstring>
   9
  10 static volatile int sink;
  11
  12 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  13   // TODO: check other sizes.
  14   const char *S = (const char*)Data;
  15   if (Size >= 8 && strncmp(S, "123", 8))
  16     sink = 1;
  17   if (Size >= 8 && strncmp(S, "01234567", 8) == 0) {
  18     if (Size >= 12 && strncmp(S + 8, "ABCD", 4) == 0) {
  19       if (Size >= 14 && strncmp(S + 12, "XY", 2) == 0) {
  20         if (Size >= 17 && strncmp(S + 14, "KLM", 3) == 0) {
  21           fprintf(stderr, "BINGO\n");
  22           exit(1);
  23         }
  24       }
  25     }
  26   }
  27   return 0;
  28 }