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 
Switch(int a)11 int Switch(int a) {
12   switch(a) {
13     case 100001: return 1;
14     case 100002: return 2;
15     case 100003: return 4;
16   }
17   return 0;
18 }
19 
LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)20 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
21   const int N = 3;
22   if (Size < N * sizeof(int)) return 0;
23   int Res = 0;
24   for (int i = 0; i < N; i++) {
25     int X;
26     memcpy(&X, Data + i * sizeof(int), sizeof(int));
27     Res += Switch(X);
28   }
29   if (Res == 5 || Res == 3 || Res == 6 || Res == 7) {
30     fprintf(stderr, "BINGO; Found the target, exiting; Res=%d\n", Res);
31     exit(1);
32   }
33   return 0;
34 }
35 
36