#ifndef LLVM_FUZZER_INTERNAL_H
#define LLVM_FUZZER_INTERNAL_H
#include <cassert>
#include <climits>
#include <chrono>
#include <cstddef>
#include <cstdlib>
#include <string>
#include <vector>
#include <unordered_set>
#include "FuzzerInterface.h"
namespace fuzzer {
typedef std::vector<uint8_t> Unit;
using namespace std::chrono;
std::string FileToString(const std::string &Path);
Unit FileToVector(const std::string &Path);
void ReadDirToVectorOfUnits(const char *Path, std::vector<Unit> *V,
long *Epoch);
void WriteToFile(const Unit &U, const std::string &Path);
void CopyFileToErr(const std::string &Path);
std::string DirPlusFile(const std::string &DirPath,
const std::string &FileName);
void Printf(const char *Fmt, ...);
void Print(const Unit &U, const char *PrintAfter = "");
void PrintASCII(const Unit &U, const char *PrintAfter = "");
std::string Hash(const Unit &U);
void SetTimer(int Seconds);
void PrintFileAsBase64(const std::string &Path);
void ExecuteCommand(const std::string &Command);
static const int kSHA1NumBytes = 20;
void ComputeSHA1(const uint8_t *Data, size_t Len, uint8_t *Out);
bool ToASCII(Unit &U);
bool IsASCII(const Unit &U);
int NumberOfCpuCores();
int GetPid();
bool ParseOneDictionaryEntry(const std::string &Str, Unit *U);
bool ParseDictionaryFile(const std::string &Text, std::vector<Unit> *Units);
class Fuzzer {
public:
struct FuzzingOptions {
int Verbosity = 1;
int MaxLen = 0;
int UnitTimeoutSec = 300;
int MaxTotalTimeSec = 0;
bool DoCrossOver = true;
int MutateDepth = 5;
bool ExitOnFirst = false;
bool UseCounters = false;
bool UseIndirCalls = true;
bool UseTraces = false;
bool UseFullCoverageSet = false;
bool Reload = true;
bool ShuffleAtStartUp = true;
int PreferSmallDuringInitialShuffle = -1;
size_t MaxNumberOfRuns = ULONG_MAX;
int SyncTimeout = 600;
int ReportSlowUnits = 10;
bool OnlyASCII = false;
int TBMDepth = 10;
int TBMWidth = 10;
std::string OutputCorpus;
std::string SyncCommand;
std::string ArtifactPrefix = "./";
std::vector<Unit> Dictionary;
bool SaveArtifacts = true;
};
Fuzzer(UserSuppliedFuzzer &USF, FuzzingOptions Options);
void AddToCorpus(const Unit &U) { Corpus.push_back(U); }
size_t ChooseUnitToMutate();
void Loop();
void ShuffleAndMinimize();
void InitializeTraceState();
size_t CorpusSize() const { return Corpus.size(); }
void ReadDir(const std::string &Path, long *Epoch) {
Printf("Loading corpus: %s\n", Path.c_str());
ReadDirToVectorOfUnits(Path.c_str(), &Corpus, Epoch);
}
void RereadOutputCorpus();
void SaveCorpus();
size_t secondsSinceProcessStartUp() {
return duration_cast<seconds>(system_clock::now() - ProcessStartTime)
.count();
}
size_t getTotalNumberOfRuns() { return TotalNumberOfRuns; }
static void StaticAlarmCallback();
void ExecuteCallback(const Unit &U);
void Merge(const std::vector<std::string> &Corpora);
private:
void AlarmCallback();
void MutateAndTestOne(Unit *U);
void ReportNewCoverage(const Unit &U);
bool RunOne(const Unit &U);
void RunOneAndUpdateCorpus(Unit &U);
void WriteToOutputCorpus(const Unit &U);
void WriteUnitToFileWithPrefix(const Unit &U, const char *Prefix);
void PrintStats(const char *Where, const char *End = "\n");
void PrintUnitInASCII(const Unit &U, const char *PrintAfter = "");
void SyncCorpus();
size_t RecordBlockCoverage();
size_t RecordCallerCalleeCoverage();
void PrepareCoverageBeforeRun();
bool CheckCoverageAfterRun();
void StartTraceRecording();
size_t StopTraceRecording();
void ApplyTraceBasedMutation(size_t Idx, Unit *U);
void SetDeathCallback();
static void StaticDeathCallback();
void DeathCallback();
Unit CurrentUnit;
size_t TotalNumberOfRuns = 0;
size_t TotalNumberOfExecutedTraceBasedMutations = 0;
std::vector<Unit> Corpus;
std::unordered_set<std::string> UnitHashesAddedToCorpus;
std::vector<uint8_t> CounterBitmap;
size_t TotalBits() { size_t Res = 0;
for (auto x : CounterBitmap) Res += __builtin_popcount(x);
return Res;
}
UserSuppliedFuzzer &USF;
FuzzingOptions Options;
system_clock::time_point ProcessStartTime = system_clock::now();
system_clock::time_point LastExternalSync = system_clock::now();
system_clock::time_point UnitStartTime;
long TimeOfLongestUnitInSeconds = 0;
long EpochOfLastReadOfOutputCorpus = 0;
size_t LastRecordedBlockCoverage = 0;
size_t LastRecordedCallerCalleeCoverage = 0;
};
class SimpleUserSuppliedFuzzer: public UserSuppliedFuzzer {
public:
SimpleUserSuppliedFuzzer(FuzzerRandomBase *Rand, UserCallback Callback)
: UserSuppliedFuzzer(Rand), Callback(Callback) {}
virtual int TargetFunction(const uint8_t *Data, size_t Size) override {
return Callback(Data, Size);
}
private:
UserCallback Callback = nullptr;
};
};
#endif // LLVM_FUZZER_INTERNAL_H