ceph/src/jaegertracing/opentelemetry-cpp/third_party/nlohmann-json/test/thirdparty/Fuzzer/test/SimpleCmpTest.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 several narrow ranges.
   5 #include <cstdint>
   6 #include <cstdlib>
   7 #include <cstring>
   8 #include <cstdio>
   9
  10 extern int AllLines[];
  11
  12 bool PrintOnce(int Line) {
  13   if (!AllLines[Line])
  14     fprintf(stderr, "Seen line %d\n", Line);
  15   AllLines[Line] = 1;
  16   return true;
  17 }
  18
  19 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
  20   if (Size != 22) return 0;
  21   uint64_t x = 0;
  22   int64_t  y = 0;
  23   int32_t z = 0;
  24   uint16_t a = 0;
  25   memcpy(&x, Data, 8);  // 8
  26   memcpy(&y, Data + 8, 8);  // 16
  27   memcpy(&z, Data + 16, sizeof(z));  // 20
  28   memcpy(&a, Data + 20, sizeof(a));  // 22
  29
  30   if (x > 1234567890 && PrintOnce(__LINE__) &&
  31       x < 1234567895 && PrintOnce(__LINE__) &&
  32       a == 0x4242 && PrintOnce(__LINE__) &&
  33       y >= 987654321 && PrintOnce(__LINE__) &&
  34       y <= 987654325 && PrintOnce(__LINE__) &&
  35       z < -10000 && PrintOnce(__LINE__) &&
  36       z >= -10005 && PrintOnce(__LINE__) &&
  37       z != -10003 && PrintOnce(__LINE__) &&
  38       true) {
  39     fprintf(stderr, "BINGO; Found the target: size %zd (%zd, %zd, %d, %d), exiting.\n",
  40             Size, x, y, z, a);
  41     exit(1);
  42   }
  43   return 0;
  44 }
  45
  46 int AllLines[__LINE__ + 1];  // Must be the last line.