1 // This file is distributed under the University of Illinois Open Source
2 // License. See LICENSE.TXT for details.
3 
4 // Source code for a simple DSO.
5 
6 #include <cstdint>
7 #include <cstdio>
8 #include <cstdlib>
9 #include <cstring>
10 extern int DSO1(int a);
11 extern int DSO2(int a);
12 extern int DSOTestExtra(int a);
13 
14 static volatile int *nil = 0;
15 
16 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
17   int x, y, z;
18   if (Size < sizeof(int) * 3) {
19     x = y = z = 0;
20   } else {
21     memcpy(&x, Data + 0 * sizeof(int), sizeof(int));
22     memcpy(&y, Data + 1 * sizeof(int), sizeof(int));
23     memcpy(&z, Data + 2 * sizeof(int), sizeof(int));
24   }
25   int sum = DSO1(x) + DSO2(y) + (z ? DSOTestExtra(z) : 0);
26   if (sum == 3) {
27     fprintf(stderr, "BINGO %d %d %d\n", x, y, z);
28     *nil = 0;
29   }
30   return 0;
31 }
32