#include "FuzzerInternal.h"
#include <cstring>
+#include <chrono>
#include <unistd.h>
-#include <iostream>
#include <thread>
#include <atomic>
#include <mutex>
#undef FUZZER_FLAG_STRING
} Flags;
-static FlagDescription FlagDescriptions [] {
+static const FlagDescription FlagDescriptions [] {
#define FUZZER_FLAG_INT(Name, Default, Description) \
{ #Name, Description, Default, &Flags.Name, nullptr},
#define FUZZER_FLAG_STRING(Name, Description) \
static const size_t kNumFlags =
sizeof(FlagDescriptions) / sizeof(FlagDescriptions[0]);
-static std::vector<std::string> inputs;
-static const char *ProgName;
+static std::vector<std::string> *Inputs;
+static std::string *ProgName;
static void PrintHelp() {
- std::cerr << "Usage: " << ProgName
- << " [-flag1=val1 [-flag2=val2 ...] ] [dir1 [dir2 ...] ]\n";
- std::cerr << "\nFlags: (strictly in form -flag=value)\n";
+ Printf("Usage: %s [-flag1=val1 [-flag2=val2 ...] ] [dir1 [dir2 ...] ]\n",
+ ProgName->c_str());
+ Printf("\nFlags: (strictly in form -flag=value)\n");
size_t MaxFlagLen = 0;
for (size_t F = 0; F < kNumFlags; F++)
MaxFlagLen = std::max(strlen(FlagDescriptions[F].Name), MaxFlagLen);
for (size_t F = 0; F < kNumFlags; F++) {
const auto &D = FlagDescriptions[F];
- std::cerr << " " << D.Name;
+ Printf(" %s", D.Name);
for (size_t i = 0, n = MaxFlagLen - strlen(D.Name); i < n; i++)
- std::cerr << " ";
- std::cerr << "\t";
- std::cerr << D.Default << "\t" << D.Description << "\n";
+ Printf(" ");
+ Printf("\t");
+ Printf("%d\t%s\n", D.Default, D.Description);
}
+ Printf("\nFlags starting with '--' will be ignored and "
+ "will be passed verbatim to subprocesses.\n");
}
static const char *FlagValue(const char *Param, const char *Name) {
static bool ParseOneFlag(const char *Param) {
if (Param[0] != '-') return false;
+ if (Param[1] == '-') {
+ static bool PrintedWarning = false;
+ if (!PrintedWarning) {
+ PrintedWarning = true;
+ Printf("WARNING: libFuzzer ignores flags that start with '--'\n");
+ }
+ return true;
+ }
for (size_t F = 0; F < kNumFlags; F++) {
const char *Name = FlagDescriptions[F].Name;
const char *Str = FlagValue(Param, Name);
int Val = std::stol(Str);
*FlagDescriptions[F].IntFlag = Val;
if (Flags.verbosity >= 2)
- std::cerr << "Flag: " << Name << " " << Val << "\n";
+ Printf("Flag: %s %d\n", Name, Val);;
return true;
} else if (FlagDescriptions[F].StrFlag) {
*FlagDescriptions[F].StrFlag = Str;
if (Flags.verbosity >= 2)
- std::cerr << "Flag: " << Name << " " << Str << "\n";
+ Printf("Flag: %s %s\n", Name, Str);
return true;
}
}
}
// We don't use any library to minimize dependencies.
-static void ParseFlags(int argc, char **argv) {
+static void ParseFlags(const std::vector<std::string> &Args) {
for (size_t F = 0; F < kNumFlags; F++) {
if (FlagDescriptions[F].IntFlag)
*FlagDescriptions[F].IntFlag = FlagDescriptions[F].Default;
if (FlagDescriptions[F].StrFlag)
*FlagDescriptions[F].StrFlag = nullptr;
}
- for (int A = 1; A < argc; A++) {
- if (ParseOneFlag(argv[A])) continue;
- inputs.push_back(argv[A]);
+ Inputs = new std::vector<std::string>;
+ for (size_t A = 1; A < Args.size(); A++) {
+ if (ParseOneFlag(Args[A].c_str())) continue;
+ Inputs->push_back(Args[A]);
+ }
+}
+
+static std::mutex Mu;
+
+static void PulseThread() {
+ while (true) {
+ std::this_thread::sleep_for(std::chrono::seconds(600));
+ std::lock_guard<std::mutex> Lock(Mu);
+ Printf("pulse...\n");
}
}
static void WorkerThread(const std::string &Cmd, std::atomic<int> *Counter,
int NumJobs, std::atomic<bool> *HasErrors) {
- static std::mutex CerrMutex;
while (true) {
int C = (*Counter)++;
if (C >= NumJobs) break;
std::string Log = "fuzz-" + std::to_string(C) + ".log";
std::string ToRun = Cmd + " > " + Log + " 2>&1\n";
if (Flags.verbosity)
- std::cerr << ToRun;
+ Printf("%s", ToRun.c_str());
int ExitCode = system(ToRun.c_str());
if (ExitCode != 0)
*HasErrors = true;
- std::lock_guard<std::mutex> Lock(CerrMutex);
- std::cerr << "================== Job " << C
- << " exited with exit code " << ExitCode
- << " =================\n";
+ std::lock_guard<std::mutex> Lock(Mu);
+ Printf("================== Job %d exited with exit code %d ============\n",
+ C, ExitCode);
fuzzer::CopyFileToErr(Log);
}
}
-static int RunInMultipleProcesses(int argc, char **argv, int NumWorkers,
- int NumJobs) {
+static int RunInMultipleProcesses(const std::vector<std::string> &Args,
+ int NumWorkers, int NumJobs) {
std::atomic<int> Counter(0);
std::atomic<bool> HasErrors(false);
std::string Cmd;
- for (int i = 0; i < argc; i++) {
- if (FlagValue(argv[i], "jobs") || FlagValue(argv[i], "workers")) continue;
- Cmd += argv[i];
- Cmd += " ";
+ for (auto &S : Args) {
+ if (FlagValue(S.c_str(), "jobs") || FlagValue(S.c_str(), "workers"))
+ continue;
+ Cmd += S + " ";
}
std::vector<std::thread> V;
+ std::thread Pulse(PulseThread);
+ Pulse.detach();
for (int i = 0; i < NumWorkers; i++)
V.push_back(std::thread(WorkerThread, Cmd, &Counter, NumJobs, &HasErrors));
for (auto &T : V)
return HasErrors ? 1 : 0;
}
-std::vector<std::string> ReadTokensFile(const char *TokensFilePath) {
- if (!TokensFilePath) return {};
- std::string TokensFileContents = FileToString(TokensFilePath);
- std::istringstream ISS(TokensFileContents);
- std::vector<std::string> Res = {std::istream_iterator<std::string>{ISS},
- std::istream_iterator<std::string>{}};
- Res.push_back(" ");
- Res.push_back("\t");
- Res.push_back("\n");
- return Res;
-}
-
-int ApplyTokens(const Fuzzer &F, const char *InputFilePath) {
+int RunOneTest(Fuzzer *F, const char *InputFilePath) {
Unit U = FileToVector(InputFilePath);
- auto T = F.SubstituteTokens(U);
- T.push_back(0);
- std::cout << T.data();
+ Unit PreciseSizedU(U);
+ assert(PreciseSizedU.size() == PreciseSizedU.capacity());
+ F->ExecuteCallback(PreciseSizedU);
return 0;
}
int FuzzerDriver(int argc, char **argv, UserCallback Callback) {
- using namespace fuzzer;
+ FuzzerRandomLibc Rand(0);
+ SimpleUserSuppliedFuzzer SUSF(&Rand, Callback);
+ return FuzzerDriver(argc, argv, SUSF);
+}
+
+int FuzzerDriver(int argc, char **argv, UserSuppliedFuzzer &USF) {
+ std::vector<std::string> Args(argv, argv + argc);
+ return FuzzerDriver(Args, USF);
+}
+
+int FuzzerDriver(const std::vector<std::string> &Args, UserCallback Callback) {
+ FuzzerRandomLibc Rand(0);
+ SimpleUserSuppliedFuzzer SUSF(&Rand, Callback);
+ return FuzzerDriver(Args, SUSF);
+}
- ProgName = argv[0];
- ParseFlags(argc, argv);
+int FuzzerDriver(const std::vector<std::string> &Args,
+ UserSuppliedFuzzer &USF) {
+ using namespace fuzzer;
+ assert(!Args.empty());
+ ProgName = new std::string(Args[0]);
+ ParseFlags(Args);
if (Flags.help) {
PrintHelp();
return 0;
}
+ if (Flags.jobs > 0 && Flags.workers == 0) {
+ Flags.workers = std::min(NumberOfCpuCores() / 2, Flags.jobs);
+ if (Flags.workers > 1)
+ Printf("Running %d workers\n", Flags.workers);
+ }
+
if (Flags.workers > 0 && Flags.jobs > 0)
- return RunInMultipleProcesses(argc, argv, Flags.workers, Flags.jobs);
+ return RunInMultipleProcesses(Args, Flags.workers, Flags.jobs);
Fuzzer::FuzzingOptions Options;
Options.Verbosity = Flags.verbosity;
Options.MaxLen = Flags.max_len;
+ Options.UnitTimeoutSec = Flags.timeout;
+ Options.MaxTotalTimeSec = Flags.max_total_time;
Options.DoCrossOver = Flags.cross_over;
Options.MutateDepth = Flags.mutate_depth;
Options.ExitOnFirst = Flags.exit_on_first;
Options.UseCounters = Flags.use_counters;
- Options.UseFullCoverageSet = Flags.use_full_coverage_set;
- Options.UseCoveragePairs = Flags.use_coverage_pairs;
- Options.UseDFSan = Flags.dfsan;
+ Options.UseIndirCalls = Flags.use_indir_calls;
+ Options.UseTraces = Flags.use_traces;
+ Options.ShuffleAtStartUp = Flags.shuffle;
Options.PreferSmallDuringInitialShuffle =
Flags.prefer_small_during_initial_shuffle;
- Options.Tokens = ReadTokensFile(Flags.tokens);
+ Options.Reload = Flags.reload;
+ Options.OnlyASCII = Flags.only_ascii;
+ Options.TBMDepth = Flags.tbm_depth;
+ Options.TBMWidth = Flags.tbm_width;
if (Flags.runs >= 0)
Options.MaxNumberOfRuns = Flags.runs;
- if (!inputs.empty())
- Options.OutputCorpus = inputs[0];
- Fuzzer F(Callback, Options);
-
- unsigned seed = Flags.seed;
- // Initialize seed.
- if (seed == 0)
- seed = time(0) * 10000 + getpid();
- if (Flags.verbosity)
- std::cerr << "Seed: " << seed << "\n";
- srand(seed);
+ if (!Inputs->empty())
+ Options.OutputCorpus = (*Inputs)[0];
+ if (Flags.sync_command)
+ Options.SyncCommand = Flags.sync_command;
+ Options.SyncTimeout = Flags.sync_timeout;
+ Options.ReportSlowUnits = Flags.report_slow_units;
+ if (Flags.artifact_prefix)
+ Options.ArtifactPrefix = Flags.artifact_prefix;
+ if (Flags.dict)
+ if (!ParseDictionaryFile(FileToString(Flags.dict), &Options.Dictionary))
+ return 1;
+ if (Flags.verbosity > 0 && !Options.Dictionary.empty())
+ Printf("Dictionary: %zd entries\n", Options.Dictionary.size());
+ Options.SaveArtifacts = !Flags.test_single_input;
+
+ Fuzzer F(USF, Options);
// Timer
if (Flags.timeout > 0)
- SetTimer(Flags.timeout);
+ SetTimer(Flags.timeout / 2 + 1);
+
+ if (Flags.test_single_input)
+ return RunOneTest(&F, Flags.test_single_input);
- if (Flags.verbosity >= 2) {
- std::cerr << "Tokens: {";
- for (auto &T : Options.Tokens)
- std::cerr << T << ",";
- std::cerr << "}\n";
+ if (Flags.merge) {
+ F.Merge(*Inputs);
+ exit(0);
}
- if (Flags.apply_tokens)
- return ApplyTokens(F, Flags.apply_tokens);
+ unsigned Seed = Flags.seed;
+ // Initialize Seed.
+ if (Seed == 0)
+ Seed = time(0) * 10000 + getpid();
+ if (Flags.verbosity)
+ Printf("Seed: %u\n", Seed);
+ USF.GetRand().ResetSeed(Seed);
- for (auto &inp : inputs)
- F.ReadDir(inp);
+ F.RereadOutputCorpus();
+ for (auto &inp : *Inputs)
+ if (inp != Options.OutputCorpus)
+ F.ReadDir(inp, nullptr);
if (F.CorpusSize() == 0)
F.AddToCorpus(Unit()); // Can't fuzz empty corpus, so add an empty input.
F.ShuffleAndMinimize();
if (Flags.save_minimized_corpus)
F.SaveCorpus();
- F.Loop(Flags.iterations < 0 ? INT_MAX : Flags.iterations);
+ F.Loop();
if (Flags.verbosity)
- std::cerr << "Done " << F.getTotalNumberOfRuns()
- << " runs in " << F.secondsSinceProcessStartUp()
- << " seconds\n";
- return 0;
+ Printf("Done %d runs in %zd second(s)\n", F.getTotalNumberOfRuns(),
+ F.secondsSinceProcessStartUp());
+
+ exit(0); // Don't let F destroy itself.
}
} // namespace fuzzer
projects / oota-llvm.git / blobdiff