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 several narrow ranges.
5 #include <cstdint>
6 #include <cstdlib>
7 #include <cstring>
8 #include <cstdio>
9
10 extern int AllLines[];
11
PrintOnce(int Line)12 bool PrintOnce(int Line) {
13 if (!AllLines[Line])
14 fprintf(stderr, "Seen line %d\n", Line);
15 AllLines[Line] = 1;
16 return true;
17 }
18
LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)19 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
20 if (Size != 22) return 0;
21 uint64_t x = 0;
22 int64_t y = 0;
23 int32_t z = 0;
24 uint16_t a = 0;
25 memcpy(&x, Data, 8); // 8
26 memcpy(&y, Data + 8, 8); // 16
27 memcpy(&z, Data + 16, sizeof(z)); // 20
28 memcpy(&a, Data + 20, sizeof(a)); // 22
29
30 if (x > 1234567890 && PrintOnce(__LINE__) &&
31 x < 1234567895 && PrintOnce(__LINE__) &&
32 a == 0x4242 && PrintOnce(__LINE__) &&
33 y >= 987654321 && PrintOnce(__LINE__) &&
34 y <= 987654325 && PrintOnce(__LINE__) &&
35 z < -10000 && PrintOnce(__LINE__) &&
36 z >= -10005 && PrintOnce(__LINE__) &&
37 z != -10003 && PrintOnce(__LINE__) &&
38 true) {
39 fprintf(stderr, "BINGO; Found the target: size %zd (%zd, %zd, %d, %d), exiting.\n",
40 Size, x, y, z, a);
41 exit(1);
42 }
43 return 0;
44 }
45
46 int AllLines[__LINE__ + 1]; // Must be the last line.
47