//===----------------------------------------------------------------------===//
// Define the main class fuzzer::Fuzzer and most functions.
//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_FUZZER_INTERNAL_H
+#define LLVM_FUZZER_INTERNAL_H
+
#include <cassert>
#include <climits>
#include <chrono>
#include "FuzzerInterface.h"
namespace fuzzer {
-typedef std::vector<uint8_t> Unit;
using namespace std::chrono;
std::string FileToString(const std::string &Path);
std::string DirPlusFile(const std::string &DirPath,
const std::string &FileName);
-size_t Mutate(uint8_t *Data, size_t Size, size_t MaxSize);
-
-size_t CrossOver(const uint8_t *Data1, size_t Size1, const uint8_t *Data2,
- size_t Size2, uint8_t *Out, size_t MaxOutSize);
-
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);
+std::string Base64(const Unit &U);
+int ExecuteCommand(const std::string &Command);
// Private copy of SHA1 implementation.
static const int kSHA1NumBytes = 20;
// Computes SHA1 hash of 'Len' bytes in 'Data', writes kSHA1NumBytes to 'Out'.
void ComputeSHA1(const uint8_t *Data, size_t Len, uint8_t *Out);
+// Changes U to contain only ASCII (isprint+isspace) characters.
+// Returns true iff U has been changed.
+bool ToASCII(Unit &U);
+bool IsASCII(const Unit &U);
+
int NumberOfCpuCores();
+int GetPid();
+
+// Dictionary.
+
+// Parses one dictionary entry.
+// If successfull, write the enty to Unit and returns true,
+// otherwise returns false.
+bool ParseOneDictionaryEntry(const std::string &Str, Unit *U);
+// Parses the dictionary file, fills Units, returns true iff all lines
+// were parsed succesfully.
+bool ParseDictionaryFile(const std::string &Text, std::vector<Unit> *Units);
class Fuzzer {
public:
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::vector<std::string> Tokens;
+ std::string ArtifactPrefix = "./";
+ std::string ExactArtifactPath;
+ bool SaveArtifacts = true;
+ bool PrintNEW = true; // Print a status line when new units are found;
+ bool OutputCSV = false;
};
Fuzzer(UserSuppliedFuzzer &USF, FuzzingOptions Options);
void AddToCorpus(const Unit &U) { Corpus.push_back(U); }
- void Loop(size_t NumIterations);
+ size_t ChooseUnitIdxToMutate();
+ const Unit &ChooseUnitToMutate() { return Corpus[ChooseUnitIdxToMutate()]; };
+ void Loop();
+ void Drill();
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();
static void StaticAlarmCallback();
- Unit SubstituteTokens(const Unit &U) const;
+ void ExecuteCallback(const Unit &U);
+
+ // Merge Corpora[1:] into Corpora[0].
+ void Merge(const std::vector<std::string> &Corpora);
private:
void AlarmCallback();
- void ExecuteCallback(const Unit &U);
- void MutateAndTestOne(Unit *U);
- void ReportNewCoverage(size_t NewCoverage, const Unit &U);
- size_t RunOne(const Unit &U);
- void RunOneAndUpdateCorpus(const Unit &U);
- size_t RunOneMaximizeTotalCoverage(const Unit &U);
- size_t RunOneMaximizeFullCoverageSet(const Unit &U);
- size_t RunOneMaximizeCoveragePairs(const Unit &U);
+ void MutateAndTestOne();
+ void ReportNewCoverage(const Unit &U);
+ bool RunOne(const Unit &U);
+ void RunOneAndUpdateCorpus(Unit &U);
void WriteToOutputCorpus(const Unit &U);
- void WriteToCrash(const Unit &U, const char *Prefix);
- void PrintStats(const char *Where, size_t Cov, const char *End = "\n");
- void PrintUnitInASCIIOrTokens(const Unit &U, const char *PrintAfter = "");
+ void WriteUnitToFileWithPrefix(const Unit &U, const char *Prefix);
+ void PrintStats(const char *Where, const char *End = "\n");
+ void PrintStatusForNewUnit(const Unit &U);
+ void PrintUnitInASCII(const Unit &U, const char *PrintAfter = "");
void SyncCorpus();
+ size_t RecordBlockCoverage();
+ size_t RecordCallerCalleeCoverage();
+ void PrepareCoverageBeforeRun();
+ bool CheckCoverageAfterRun();
+
+
// Trace-based fuzzing: we run a unit with some kind of tracing
// enabled and record potentially useful mutations. Then
// We apply these mutations one by one to the unit and run it again.
Unit CurrentUnit;
size_t TotalNumberOfRuns = 0;
+ size_t TotalNumberOfExecutedTraceBasedMutations = 0;
std::vector<Unit> Corpus;
std::unordered_set<std::string> UnitHashesAddedToCorpus;
- std::unordered_set<uintptr_t> FullCoverageSets;
// For UseCounters
std::vector<uint8_t> CounterBitmap;
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(UserCallback Callback) : Callback(Callback) {}
- virtual void TargetFunction(const uint8_t *Data, size_t Size) {
+ 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;
+ UserCallback Callback = nullptr;
};
}; // namespace fuzzer
+
+#endif // LLVM_FUZZER_INTERNAL_H
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