1 // Simple test for a fuzzer. The fuzzer must find the interesting switch value. 2 #include <cstdint> 3 #include <cstdlib> 4 #include <cstdio> 5 #include <cstring> 6 #include <cstddef> 7 8 static volatile int Sink; 9 10 template<class T> 11 bool Switch(const uint8_t *Data, size_t Size) { 12 T X; 13 if (Size < sizeof(X)) return false; 14 memcpy(&X, Data, sizeof(X)); 15 switch (X) { 16 case 1: Sink = __LINE__; break; 17 case 101: Sink = __LINE__; break; 18 case 1001: Sink = __LINE__; break; 19 case 10001: Sink = __LINE__; break; 20 case 100001: Sink = __LINE__; break; 21 case 1000001: Sink = __LINE__; break; 22 case 10000001: Sink = __LINE__; break; 23 case 100000001: return true; 24 } 25 return false; 26 } 27 28 bool ShortSwitch(const uint8_t *Data, size_t Size) { 29 short X; 30 if (Size < sizeof(short)) return false; 31 memcpy(&X, Data, sizeof(short)); 32 switch(X) { 33 case 42: Sink = __LINE__; break; 34 case 402: Sink = __LINE__; break; 35 case 4002: Sink = __LINE__; break; 36 case 5002: Sink = __LINE__; break; 37 case 7002: Sink = __LINE__; break; 38 case 9002: Sink = __LINE__; break; 39 case 14002: Sink = __LINE__; break; 40 case 21402: return true; 41 } 42 return false; 43 } 44 45 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) { 46 if (Size >= 4 && Switch<int>(Data, Size) && 47 Size >= 12 && Switch<uint64_t>(Data + 4, Size - 4) && 48 Size >= 14 && ShortSwitch(Data + 12, 2) 49 ) { 50 fprintf(stderr, "BINGO; Found the target, exiting\n"); 51 exit(1); 52 } 53 return 0; 54 } 55 56
