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 cutom mutator.
5 #include <assert.h>
6 #include <cstddef>
7 #include <cstdint>
8 #include <cstdlib>
9 #include <iostream>
10 #include <ostream>
11
12 #include "FuzzerInterface.h"
13
14 static volatile int Sink;
15
LLVMFuzzerTestOneInput(const uint8_t * Data,size_t Size)16 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
17 assert(Data);
18 if (Size > 0 && Data[0] == 'H') {
19 Sink = 1;
20 if (Size > 1 && Data[1] == 'i') {
21 Sink = 2;
22 if (Size > 2 && Data[2] == '!') {
23 std::cout << "BINGO; Found the target, exiting\n" << std::flush;
24 exit(1);
25 }
26 }
27 }
28 return 0;
29 }
30
LLVMFuzzerCustomMutator(uint8_t * Data,size_t Size,size_t MaxSize,unsigned int Seed)31 extern "C" size_t LLVMFuzzerCustomMutator(uint8_t *Data, size_t Size,
32 size_t MaxSize, unsigned int Seed) {
33 static bool Printed;
34 if (!Printed) {
35 std::cerr << "In LLVMFuzzerCustomMutator\n";
36 Printed = true;
37 }
38 return LLVMFuzzerMutate(Data, Size, MaxSize);
39 }
40