1 // Copyright 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 // A simple unit-test style driver for libfuzzer tests.
6 // Usage: <fuzzer_test> <file>...
7 
8 #include <fstream>
9 #include <iostream>
10 #include <iterator>
11 #include <vector>
12 
13 // Libfuzzer API.
14 extern "C" {
15 // User function.
16 int LLVMFuzzerTestOneInput(const unsigned char* data, size_t size);
17 // Initialization function.
18 __attribute__((weak)) int LLVMFuzzerInitialize(int* argc, char*** argv);
19 }
20 
readFile(std::string path)21 std::vector<char> readFile(std::string path) {
22   std::ifstream in(path);
23   return std::vector<char>((std::istreambuf_iterator<char>(in)),
24                            std::istreambuf_iterator<char>());
25 }
26 
main(int argc,char ** argv)27 int main(int argc, char** argv) {
28   if (argc == 1) {
29     std::cerr << "Usage: " << argv[0] << " <file>..." << std::endl;
30     exit(1);
31   }
32 
33   if (LLVMFuzzerInitialize)
34     LLVMFuzzerInitialize(&argc, &argv);
35 
36   for (int i = 1; i < argc; ++i) {
37     std::cout << argv[i] << std::endl;
38     auto v = readFile(argv[i]);
39     LLVMFuzzerTestOneInput((const unsigned char*)v.data(), v.size());
40   }
41 }
42