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>
Switch(const uint8_t * Data,size_t Size)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
ShortSwitch(const uint8_t * Data,size_t Size)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
LLVMFuzzerTestOneInput(const uint8_t * Data,size_t Size)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