1 files changed, 336 insertions, 0 deletions
diff --git a/gnu/llvm/lib/Fuzzer/FuzzerDriver.cpp b/gnu/llvm/lib/Fuzzer/FuzzerDriver.cpp
new file mode 100644
index 00000000000..66e46dbf3aa
--- /dev/null
+++ b/gnu/llvm/lib/Fuzzer/FuzzerDriver.cpp
@@ -0,0 +1,336 @@
+//===- FuzzerDriver.cpp - FuzzerDriver function and flags -----------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// FuzzerDriver and flag parsing.
+//===----------------------------------------------------------------------===//
+
+#include "FuzzerInterface.h"
+#include "FuzzerInternal.h"
+
+#include <cstring>
+#include <chrono>
+#include <unistd.h>
+#include <thread>
+#include <atomic>
+#include <mutex>
+#include <string>
+#include <sstream>
+#include <algorithm>
+#include <iterator>
+
+namespace fuzzer {
+
+// Program arguments.
+struct FlagDescription {
+  const char *Name;
+  const char *Description;
+  int   Default;
+  int   *IntFlag;
+  const char **StrFlag;
+  unsigned int *UIntFlag;
+};
+
+struct {
+#define FUZZER_FLAG_INT(Name, Default, Description) int Name;
+#define FUZZER_FLAG_UNSIGNED(Name, Default, Description) unsigned int Name;
+#define FUZZER_FLAG_STRING(Name, Description) const char *Name;
+#include "FuzzerFlags.def"
+#undef FUZZER_FLAG_INT
+#undef FUZZER_FLAG_UNSIGNED
+#undef FUZZER_FLAG_STRING
+} Flags;
+
+static const FlagDescription FlagDescriptions [] {
+#define FUZZER_FLAG_INT(Name, Default, Description)                            \
+  {#Name, Description, Default, &Flags.Name, nullptr, nullptr},
+#define FUZZER_FLAG_UNSIGNED(Name, Default, Description)                       \
+  {#Name,   Description, static_cast<int>(Default),                            \
+   nullptr, nullptr, &Flags.Name},
+#define FUZZER_FLAG_STRING(Name, Description)                                  \
+  {#Name, Description, 0, nullptr, &Flags.Name, nullptr},
+#include "FuzzerFlags.def"
+#undef FUZZER_FLAG_INT
+#undef FUZZER_FLAG_UNSIGNED
+#undef FUZZER_FLAG_STRING
+};
+
+static const size_t kNumFlags =
+    sizeof(FlagDescriptions) / sizeof(FlagDescriptions[0]);
+
+static std::vector<std::string> *Inputs;
+static std::string *ProgName;
+
+static void PrintHelp() {
+  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];
+    Printf(" %s", D.Name);
+    for (size_t i = 0, n = MaxFlagLen - strlen(D.Name); i < n; i++)
+      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) {
+  size_t Len = strlen(Name);
+  if (Param[0] == '-' && strstr(Param + 1, Name) == Param + 1 &&
+      Param[Len + 1] == '=')
+      return &Param[Len + 2];
+  return nullptr;
+}
+
+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);
+    if (Str)  {
+      if (FlagDescriptions[F].IntFlag) {
+        int Val = std::stol(Str);
+        *FlagDescriptions[F].IntFlag = Val;
+        if (Flags.verbosity >= 2)
+          Printf("Flag: %s %d\n", Name, Val);;
+        return true;
+      } else if (FlagDescriptions[F].UIntFlag) {
+        unsigned int Val = std::stoul(Str);
+        *FlagDescriptions[F].UIntFlag = Val;
+        if (Flags.verbosity >= 2)
+          Printf("Flag: %s %u\n", Name, Val);
+        return true;
+      } else if (FlagDescriptions[F].StrFlag) {
+        *FlagDescriptions[F].StrFlag = Str;
+        if (Flags.verbosity >= 2)
+          Printf("Flag: %s %s\n", Name, Str);
+        return true;
+      }
+    }
+  }
+  PrintHelp();
+  exit(1);
+}
+
+// We don't use any library to minimize dependencies.
+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].UIntFlag)
+      *FlagDescriptions[F].UIntFlag =
+          static_cast<unsigned int>(FlagDescriptions[F].Default);
+    if (FlagDescriptions[F].StrFlag)
+      *FlagDescriptions[F].StrFlag = nullptr;
+  }
+  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) {
+  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)
+      Printf("%s", ToRun.c_str());
+    int ExitCode = ExecuteCommand(ToRun.c_str());
+    if (ExitCode != 0)
+      *HasErrors = true;
+    std::lock_guard<std::mutex> Lock(Mu);
+    Printf("================== Job %d exited with exit code %d ============\n",
+           C, ExitCode);
+    fuzzer::CopyFileToErr(Log);
+  }
+}
+
+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 (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)
+    T.join();
+  return HasErrors ? 1 : 0;
+}
+
+int RunOneTest(Fuzzer *F, const char *InputFilePath) {
+  Unit U = FileToVector(InputFilePath);
+  Unit PreciseSizedU(U);
+  assert(PreciseSizedU.size() == PreciseSizedU.capacity());
+  F->ExecuteCallback(PreciseSizedU);
+  return 0;
+}
+
+int FuzzerDriver(int argc, char **argv, UserCallback Callback) {
+  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);
+}
+
+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(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.UseIndirCalls = Flags.use_indir_calls;
+  Options.UseTraces = Flags.use_traces;
+  Options.ShuffleAtStartUp = Flags.shuffle;
+  Options.PreferSmallDuringInitialShuffle =
+      Flags.prefer_small_during_initial_shuffle;
+  Options.Reload = Flags.reload;
+  Options.OnlyASCII = Flags.only_ascii;
+  Options.OutputCSV = Flags.output_csv;
+  if (Flags.runs >= 0)
+    Options.MaxNumberOfRuns = Flags.runs;
+  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.exact_artifact_path)
+    Options.ExactArtifactPath = Flags.exact_artifact_path;
+  std::vector<Unit> Dictionary;
+  if (Flags.dict)
+    if (!ParseDictionaryFile(FileToString(Flags.dict), &Dictionary))
+      return 1;
+  if (Flags.verbosity > 0 && !Dictionary.empty())
+    Printf("Dictionary: %zd entries\n", Dictionary.size());
+  Options.SaveArtifacts = !Flags.test_single_input;
+  Options.PrintNewCovPcs = Flags.print_new_cov_pcs;
+
+  Fuzzer F(USF, Options);
+
+  for (auto &U: Dictionary)
+    USF.GetMD().AddWordToManualDictionary(U);
+
+  // Timer
+  if (Flags.timeout > 0)
+    SetTimer(Flags.timeout / 2 + 1);
+
+  if (Flags.test_single_input) {
+    RunOneTest(&F, Flags.test_single_input);
+    exit(0);
+  }
+
+  if (Flags.save_minimized_corpus) {
+    Printf("The flag -save_minimized_corpus is deprecated; use -merge=1\n");
+    exit(1);
+  }
+
+  if (Flags.merge) {
+    F.Merge(*Inputs);
+    exit(0);
+  }
+
+  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);
+
+  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.drill)
+    F.Drill();
+  else
+    F.Loop();
+
+  if (Flags.verbosity)
+    Printf("Done %d runs in %zd second(s)\n", F.getTotalNumberOfRuns(),
+           F.secondsSinceProcessStartUp());
+
+  exit(0);  // Don't let F destroy itself.
+}
+
+}  // namespace fuzzer