LLVM  4.0.0
SimpleCmpTest.cpp
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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 
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 
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.
int AllLines[]
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
bool PrintOnce(int Line)