151 lines
4.7 KiB
C++
151 lines
4.7 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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#ifndef LLVM_FUZZER_INTERNAL_H
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#define LLVM_FUZZER_INTERNAL_H
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#include "FuzzerDefs.h"
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#include "FuzzerExtFunctions.h"
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#include "FuzzerInterface.h"
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#include "FuzzerOptions.h"
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#include "FuzzerSHA1.h"
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#include "FuzzerValueBitMap.h"
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#include <algorithm>
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#include <atomic>
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#include <chrono>
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#include <climits>
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#include <cstdlib>
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#include <string.h>
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namespace fuzzer {
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using namespace std::chrono;
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class Fuzzer {
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public:
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Fuzzer(UserCallback CB, InputCorpus &Corpus, MutationDispatcher &MD,
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FuzzingOptions Options);
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~Fuzzer();
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void Loop();
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void MinimizeCrashLoop(const Unit &U);
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void ShuffleAndMinimize(UnitVector *V);
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void InitializeTraceState();
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void RereadOutputCorpus(size_t MaxSize);
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size_t secondsSinceProcessStartUp() {
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return duration_cast<seconds>(system_clock::now() - ProcessStartTime)
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.count();
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}
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bool TimedOut() {
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return Options.MaxTotalTimeSec > 0 &&
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secondsSinceProcessStartUp() >
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static_cast<size_t>(Options.MaxTotalTimeSec);
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}
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size_t execPerSec() {
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size_t Seconds = secondsSinceProcessStartUp();
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return Seconds ? TotalNumberOfRuns / Seconds : 0;
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}
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size_t getTotalNumberOfRuns() { return TotalNumberOfRuns; }
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static void StaticAlarmCallback();
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static void StaticCrashSignalCallback();
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static void StaticInterruptCallback();
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static void StaticFileSizeExceedCallback();
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void ExecuteCallback(const uint8_t *Data, size_t Size);
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size_t RunOne(const uint8_t *Data, size_t Size);
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// Merge Corpora[1:] into Corpora[0].
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void Merge(const std::vector<std::string> &Corpora);
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void CrashResistantMerge(const std::vector<std::string> &Args,
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const std::vector<std::string> &Corpora,
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const char *CoverageSummaryInputPathOrNull,
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const char *CoverageSummaryOutputPathOrNull);
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void CrashResistantMergeInternalStep(const std::string &ControlFilePath);
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MutationDispatcher &GetMD() { return MD; }
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void PrintFinalStats();
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void SetMaxInputLen(size_t MaxInputLen);
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void SetMaxMutationLen(size_t MaxMutationLen);
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void RssLimitCallback();
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bool InFuzzingThread() const { return IsMyThread; }
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size_t GetCurrentUnitInFuzzingThead(const uint8_t **Data) const;
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void TryDetectingAMemoryLeak(const uint8_t *Data, size_t Size,
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bool DuringInitialCorpusExecution);
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void HandleMalloc(size_t Size);
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void AnnounceOutput(const uint8_t *Data, size_t Size);
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private:
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void AlarmCallback();
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void CrashCallback();
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void InterruptCallback();
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void MutateAndTestOne();
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void ReportNewCoverage(InputInfo *II, const Unit &U);
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size_t RunOne(const Unit &U) { return RunOne(U.data(), U.size()); }
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void WriteToOutputCorpus(const Unit &U);
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void WriteUnitToFileWithPrefix(const Unit &U, const char *Prefix);
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void PrintStats(const char *Where, const char *End = "\n", size_t Units = 0);
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void PrintStatusForNewUnit(const Unit &U);
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void ShuffleCorpus(UnitVector *V);
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void AddToCorpus(const Unit &U);
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void CheckExitOnSrcPosOrItem();
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// Trace-based fuzzing: we run a unit with some kind of tracing
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// enabled and record potentially useful mutations. Then
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// We apply these mutations one by one to the unit and run it again.
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// Start tracing; forget all previously proposed mutations.
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void StartTraceRecording();
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// Stop tracing.
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void StopTraceRecording();
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static void StaticDeathCallback();
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void DumpCurrentUnit(const char *Prefix);
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void DeathCallback();
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void AllocateCurrentUnitData();
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uint8_t *CurrentUnitData = nullptr;
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std::atomic<size_t> CurrentUnitSize;
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uint8_t BaseSha1[kSHA1NumBytes]; // Checksum of the base unit.
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bool RunningCB = false;
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size_t TotalNumberOfRuns = 0;
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size_t NumberOfNewUnitsAdded = 0;
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bool HasMoreMallocsThanFrees = false;
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size_t NumberOfLeakDetectionAttempts = 0;
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UserCallback CB;
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InputCorpus &Corpus;
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MutationDispatcher &MD;
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FuzzingOptions Options;
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system_clock::time_point ProcessStartTime = system_clock::now();
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system_clock::time_point UnitStartTime, UnitStopTime;
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long TimeOfLongestUnitInSeconds = 0;
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long EpochOfLastReadOfOutputCorpus = 0;
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size_t MaxInputLen = 0;
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size_t MaxMutationLen = 0;
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// Need to know our own thread.
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static thread_local bool IsMyThread;
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};
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}; // namespace fuzzer
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#endif // LLVM_FUZZER_INTERNAL_H
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