[libFuzzer] When -test_single_input crashes the test it is not necessary to write...

[oota-llvm.git] / lib / Fuzzer / FuzzerDriver.cpp

diff --git a/lib/Fuzzer/FuzzerDriver.cpp b/lib/Fuzzer/FuzzerDriver.cpp
index d94eb98a4da6aeda7cea1675280e73c962e448a6..55d1491c7cf3f4553efe24b8226a84a316be01d2 100644 (file)
--- a/lib/Fuzzer/FuzzerDriver.cpp
+++ b/lib/Fuzzer/FuzzerDriver.cpp
@@ -55,12 +55,12 @@ static FlagDescription FlagDescriptions [] {
 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() {
   Printf("Usage: %s [-flag1=val1 [-flag2=val2 ...] ] [dir1 [dir2 ...] ]\n",
-         ProgName);
+         ProgName->c_str());
   Printf("\nFlags: (strictly in form -flag=value)\n");
   size_t MaxFlagLen = 0;
   for (size_t F = 0; F < kNumFlags; F++)
@@ -119,16 +119,17 @@ static bool ParseOneFlag(const char *Param) {
 }
 
 // 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]);
   }
 }
 
@@ -161,15 +162,15 @@ static void WorkerThread(const std::string &Cmd, std::atomic<int> *Counter,
   }
 }
 
-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);
@@ -201,6 +202,12 @@ int ApplyTokens(const Fuzzer &F, const char *InputFilePath) {
   return 0;
 }
 
+int RunOneTest(Fuzzer *F, const char *InputFilePath) {
+  Unit U = FileToVector(InputFilePath);
+  F->ExecuteCallback(U);
+  return 0;
+}
+
 int FuzzerDriver(int argc, char **argv, UserCallback Callback) {
   FuzzerRandomLibc Rand(0);
   SimpleUserSuppliedFuzzer SUSF(&Rand, Callback);
@@ -208,10 +215,22 @@ int FuzzerDriver(int argc, char **argv, UserCallback Callback) {
 }
 
 int FuzzerDriver(int argc, char **argv, UserSuppliedFuzzer &USF) {
-  using namespace fuzzer;
+  std::vector<std::string> Args(argv, argv + argc);
+  return FuzzerDriver(Args, USF);
+}
 
-  ProgName = argv[0];
-  ParseFlags(argc, argv);
+int FuzzerDriver(const std::vector<std::string> &Args, UserCallback Callback) {
+  FuzzerRandomLibc Rand(0);
+  SimpleUserSuppliedFuzzer SUSF(&Rand, Callback);
+  return FuzzerDriver(Args, SUSF);
+}
+
+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;
@@ -224,38 +243,54 @@ int FuzzerDriver(int argc, char **argv, UserSuppliedFuzzer &USF) {
   }
 
   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.UseTraces = Flags.use_traces;
-  Options.UseFullCoverageSet = Flags.use_full_coverage_set;
   Options.PreferSmallDuringInitialShuffle =
       Flags.prefer_small_during_initial_shuffle;
-  Options.Tokens = ReadTokensFile(Flags.tokens);
+  Options.Tokens = ReadTokensFile(Flags.deprecated_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];
+  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);
 
   if (Flags.apply_tokens)
     return ApplyTokens(F, Flags.apply_tokens);
 
+  // Timer
+  if (Flags.timeout > 0)
+    SetTimer(Flags.timeout / 2 + 1);
+
+  if (Flags.test_single_input)
+    return RunOneTest(&F, Flags.test_single_input);
+
   unsigned Seed = Flags.seed;
   // Initialize Seed.
   if (Seed == 0)
@@ -264,10 +299,6 @@ int FuzzerDriver(int argc, char **argv, UserSuppliedFuzzer &USF) {
     Printf("Seed: %u\n", Seed);
   USF.GetRand().ResetSeed(Seed);
 
-  // Timer
-  if (Flags.timeout > 0)
-    SetTimer(Flags.timeout / 2 + 1);
-
   if (Flags.verbosity >= 2) {
     Printf("Tokens: {");
     for (auto &T : Options.Tokens)
@@ -276,7 +307,7 @@ int FuzzerDriver(int argc, char **argv, UserSuppliedFuzzer &USF) {
   }
 
   F.RereadOutputCorpus();
-  for (auto &inp : inputs)
+  for (auto &inp : *Inputs)
     if (inp != Options.OutputCorpus)
       F.ReadDir(inp, nullptr);
 
@@ -285,12 +316,12 @@ int FuzzerDriver(int argc, char **argv, UserSuppliedFuzzer &USF) {
   F.ShuffleAndMinimize();
   if (Flags.save_minimized_corpus)
     F.SaveCorpus();
-  F.Loop(Flags.iterations < 0 ? INT_MAX : Flags.iterations);
+  F.Loop();
   if (Flags.verbosity)
     Printf("Done %d runs in %zd second(s)\n", F.getTotalNumberOfRuns(),
            F.secondsSinceProcessStartUp());
 
-  return 0;
+  exit(0);  // Don't let F destroy itself.
 }
 
 }  // namespace fuzzer