annotate contrib/fuzz/standalone_fuzz_target_runner.cc @ 50825:973fbb27ab45

backout: migrate `opts` to native kwargs It will take a bit to unwind `cmdutil.commit`, so there's a conversion to byteskwargs there, without changing the type of `opts` in this function. That's also useful to flag it as needing to be changed.
author Matt Harbison <matt_harbison@yahoo.com>
date Sun, 20 Aug 2023 00:27:27 -0400
parents e137338e926b
children
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1 // Copyright 2017 Google Inc. All Rights Reserved.
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2 // Licensed under the Apache License, Version 2.0 (the "License");
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3
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4 // Example of a standalone runner for "fuzz targets".
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5 // It reads all files passed as parameters and feeds their contents
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6 // one by one into the fuzz target (LLVMFuzzerTestOneInput).
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7 // This runner does not do any fuzzing, but allows us to run the fuzz target
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8 // on the test corpus (e.g. "do_stuff_test_data") or on a single file,
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9 // e.g. the one that comes from a bug report.
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10
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11 #include <cassert>
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12 #include <fstream>
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13 #include <iostream>
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14 #include <vector>
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15
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16 // Forward declare the "fuzz target" interface.
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17 // We deliberately keep this inteface simple and header-free.
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18 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
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19
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20 extern "C" int LLVMFuzzerInitialize(int *argc, char ***argv);
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21
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22 int main(int argc, char **argv)
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23 {
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24 LLVMFuzzerInitialize(&argc, &argv);
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26 for (int i = 1; i < argc; i++) {
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27 std::ifstream in(argv[i]);
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28 in.seekg(0, in.end);
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29 size_t length = in.tellg();
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30 in.seekg(0, in.beg);
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31 std::cout << "Reading " << length << " bytes from " << argv[i]
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32 << std::endl;
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33 // Allocate exactly length bytes so that we reliably catch
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34 // buffer overflows.
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35 std::vector<char> bytes(length);
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36 in.read(bytes.data(), bytes.size());
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37 assert(in);
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38 LLVMFuzzerTestOneInput(
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39 reinterpret_cast<const uint8_t *>(bytes.data()),
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40 bytes.size());
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41 std::cout << "Execution successful" << std::endl;
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42 }
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43 return 0;
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44 }
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45 // no-check-code since this is from a third party