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https://github.com/c64scene-ar/llvm-6502.git
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c9baf3befb
Summary: A simple genetic in-process coverage-guided fuzz testing library. I've used this fuzzer to test clang-format (it found 12+ bugs, thanks djasper@ for the fixes!) and it may also help us test other parts of LLVM. So why not keep it in the LLVM repository? I plan to add the cmake build rules later (in a separate patch, if that's ok) and also add a clang-format-fuzzer target. See README.txt for details. Test Plan: Tests will follow separately. Reviewers: djasper, chandlerc, rnk Reviewed By: rnk Subscribers: majnemer, ygribov, dblaikie, llvm-commits Differential Revision: http://reviews.llvm.org/D7184 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227252 91177308-0d34-0410-b5e6-96231b3b80d8
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
//===- FuzzerInternal.h - Internal header for the Fuzzer --------*- C++ -* ===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// Define the main class fuzzer::Fuzzer and most functions.
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//===----------------------------------------------------------------------===//
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#include <cassert>
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#include <chrono>
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#include <cstddef>
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#include <cstdlib>
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#include <string>
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#include <vector>
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namespace fuzzer {
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typedef std::vector<uint8_t> Unit;
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using namespace std::chrono;
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Unit ReadFile(const char *Path);
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std::vector<std::string> ListFilesInDir(const std::string &Dir);
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void ReadDirToVectorOfUnits(const char *Path, std::vector<Unit> *V);
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void WriteToFile(const Unit &U, const std::string &Path);
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void Mutate(Unit *U, size_t MaxLen);
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void CrossOver(const Unit &A, const Unit &B, Unit *U, size_t MaxLen);
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void Print(const Unit &U, const char *PrintAfter = "");
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void PrintASCII(const Unit &U, const char *PrintAfter = "");
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std::string Hash(const Unit &U);
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void SetTimer(int Seconds);
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class Fuzzer {
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public:
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struct FuzzingOptions {
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int Verbosity = 1;
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int MaxLen = 0;
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bool DoCrossOver = true;
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bool MutateDepth = 10;
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bool ExitOnFirst = false;
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std::string OutputCorpus;
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};
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Fuzzer(FuzzingOptions Options) : Options(Options) {
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SetDeathCallback();
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}
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void AddToCorpus(const Unit &U) { Corpus.push_back(U); }
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size_t Loop(size_t NumIterations);
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void ShuffleAndMinimize();
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size_t CorpusSize() const { return Corpus.size(); }
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void ReadDir(const std::string &Path) {
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ReadDirToVectorOfUnits(Path.c_str(), &Corpus);
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}
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static void AlarmCallback();
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private:
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size_t MutateAndTestOne(Unit *U);
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size_t RunOne(const Unit &U);
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void WriteToOutputCorpus(const Unit &U);
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static void WriteToCrash(const Unit &U, const char *Prefix);
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void SetDeathCallback();
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static void DeathCallback();
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static Unit CurrentUnit;
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size_t TotalNumberOfRuns = 0;
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std::vector<Unit> Corpus;
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FuzzingOptions Options;
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system_clock::time_point ProcessStartTime = system_clock::now();
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static system_clock::time_point UnitStartTime;
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};
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}; // namespace fuzzer
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