compiler-rt/test/fuzzer/Labels20Test.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.
   6 // Needs to find a string "FUZZxxxxxxxxxxxxMxxE", where 'x' is any byte.
   7 #include <assert.h>
   8 #include <cstddef>
   9 #include <cstdint>
  10 #include <cstdlib>
  11 #include <cstdio>
  12
  13 extern "C" bool Func1(const uint8_t *Data, size_t Size);
  14 extern "C" bool Func2(const uint8_t *Data, size_t Size);
  15
  16 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  17   if (Size >= 20
  18       && Data[0] == 'F'
  19       && Data[1] == 'U'
  20       && Data[2] == 'Z'
  21       && Data[3] == 'Z'
  22       && Func1(Data, Size)
  23       && Func2(Data, Size)) {
  24         fprintf(stderr, "BINGO\n");
  25         abort();
  26   }
  27   return 0;
  28 }
  29
  30 extern "C"
  31 __attribute__((noinline))
  32 bool Func1(const uint8_t *Data, size_t Size) {
  33   // assumes Size >= 5, doesn't check it.
  34   return Data[16] == 'M';
  35 }
  36
  37 extern "C"
  38 __attribute__((noinline))
  39 bool Func2(const uint8_t *Data, size_t Size) {
  40   return Size >= 20 && Data[19] == 'E';
  41 }