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 the interesting switch value.
5 #include <cstdint>
6 #include <cstdlib>
7 #include <cstdio>
8 #include <cstring>
9 #include <cstddef>
10
11 static volatile int Sink;
12
13 template<class T>
Switch(const uint8_t * Data,size_t Size)14 bool Switch(const uint8_t *Data, size_t Size) {
15 T X;
16 if (Size < sizeof(X)) return false;
17 memcpy(&X, Data, sizeof(X));
18 switch (X) {
19 case 1: Sink = __LINE__; break;
20 case 101: Sink = __LINE__; break;
21 case 1001: Sink = __LINE__; break;
22 case 10001: Sink = __LINE__; break;
23 case 100001: Sink = __LINE__; break;
24 case 1000001: Sink = __LINE__; break;
25 case 10000001: Sink = __LINE__; break;
26 case 100000001: return true;
27 }
28 return false;
29 }
30
ShortSwitch(const uint8_t * Data,size_t Size)31 bool ShortSwitch(const uint8_t *Data, size_t Size) {
32 short X;
33 if (Size < sizeof(short)) return false;
34 memcpy(&X, Data, sizeof(short));
35 switch(X) {
36 case 42: Sink = __LINE__; break;
37 case 402: Sink = __LINE__; break;
38 case 4002: Sink = __LINE__; break;
39 case 5002: Sink = __LINE__; break;
40 case 7002: Sink = __LINE__; break;
41 case 9002: Sink = __LINE__; break;
42 case 14002: Sink = __LINE__; break;
43 case 21402: return true;
44 }
45 return false;
46 }
47
LLVMFuzzerTestOneInput(const uint8_t * Data,size_t Size)48 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
49 if (Size >= 4 && Switch<int>(Data, Size) &&
50 Size >= 12 && Switch<uint64_t>(Data + 4, Size - 4) &&
51 Size >= 14 && ShortSwitch(Data + 12, 2)
52 ) {
53 fprintf(stderr, "BINGO; Found the target, exiting\n");
54 exit(1);
55 }
56 return 0;
57 }
58
59