compiler-rt/test/fuzzer/ThreadedTest.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 // Threaded test for a fuzzer. The fuzzer should not crash.
   6 #include <assert.h>
   7 #include <cstddef>
   8 #include <cstdint>
   9 #include <cstring>
  10 #include <thread>
  11
  12 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  13   if (Size < 8) return 0;
  14   assert(Data);
  15   auto C = [&] {
  16     size_t Res = 0;
  17     for (size_t i = 0; i < Size / 2; i++)
  18       Res += memcmp(Data, Data + Size / 2, 4);
  19     return Res;
  20   };
  21   std::thread T[] = {std::thread(C), std::thread(C), std::thread(C),
  22                      std::thread(C), std::thread(C), std::thread(C)};
  23   for (auto &X : T)
  24     X.join();
  25   return 0;
  26 }
  27