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llvm-project/llvm/lib/Fuzzer/FuzzerDriver.cpp
Chandler Carruth 6bda14b313 Sort the remaining #include lines in include/... and lib/.... 
I did this a long time ago with a janky python script, but now
clang-format has built-in support for this. I fed clang-format every
line with a #include and let it re-sort things according to the precise
LLVM rules for include ordering baked into clang-format these days.

I've reverted a number of files where the results of sorting includes
isn't healthy. Either places where we have legacy code relying on
particular include ordering (where possible, I'll fix these separately)
or where we have particular formatting around #include lines that
I didn't want to disturb in this patch.

This patch is *entirely* mechanical. If you get merge conflicts or
anything, just ignore the changes in this patch and run clang-format
over your #include lines in the files.

Sorry for any noise here, but it is important to keep these things
stable. I was seeing an increasing number of patches with irrelevant
re-ordering of #include lines because clang-format was used. This patch
at least isolates that churn, makes it easy to skip when resolving
conflicts, and gets us to a clean baseline (again).

llvm-svn: 304787
2017-06-06 11:49:48 +00:00

758 lines
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//===- 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 "FuzzerCorpus.h"
#include "FuzzerIO.h"
#include "FuzzerInterface.h"
#include "FuzzerInternal.h"
#include "FuzzerMutate.h"
#include "FuzzerRandom.h"
#include "FuzzerShmem.h"
#include "FuzzerTracePC.h"
#include <algorithm>
#include <atomic>
#include <chrono>
#include <cstring>
#include <mutex>
#include <string>
#include <thread>
// This function should be present in the libFuzzer so that the client
// binary can test for its existence.
extern "C" __attribute__((used)) void __libfuzzer_is_present() {}
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_DEPRECATED_FLAG(Name)
#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_DEPRECATED_FLAG
#undef FUZZER_FLAG_INT
#undef FUZZER_FLAG_UNSIGNED
#undef FUZZER_FLAG_STRING
} Flags;
static const FlagDescription FlagDescriptions [] {
#define FUZZER_DEPRECATED_FLAG(Name) \
{#Name, "Deprecated; don't use", 0, nullptr, nullptr, nullptr},
#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_DEPRECATED_FLAG
#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:\n");
auto Prog = ProgName->c_str();
Printf("\nTo run fuzzing pass 0 or more directories.\n");
Printf("%s [-flag1=val1 [-flag2=val2 ...] ] [dir1 [dir2 ...] ]\n", Prog);
Printf("\nTo run individual tests without fuzzing pass 1 or more files:\n");
Printf("%s [-flag1=val1 [-flag2=val2 ...] ] file1 [file2 ...]\n", Prog);
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];
if (strstr(D.Description, "internal flag") == D.Description) continue;
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;
}
// Avoid calling stol as it triggers a bug in clang/glibc build.
static long MyStol(const char *Str) {
long Res = 0;
long Sign = 1;
if (*Str == '-') {
Str++;
Sign = -1;
}
for (size_t i = 0; Str[i]; i++) {
char Ch = Str[i];
if (Ch < '0' || Ch > '9')
return Res;
Res = Res * 10 + (Ch - '0');
}
return Res * Sign;
}
static bool ParseOneFlag(const char *Param) {
if (Param[0] != '-') return false;
if (Param[1] == '-') {
static bool PrintedWarning = false;
if (!PrintedWarning) {
PrintedWarning = true;
Printf("INFO: libFuzzer ignores flags that start with '--'\n");
}
for (size_t F = 0; F < kNumFlags; F++)
if (FlagValue(Param + 1, FlagDescriptions[F].Name))
Printf("WARNING: did you mean '%s' (single dash)?\n", Param + 1);
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 = MyStol(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;
} else { // Deprecated flag.
Printf("Flag: %s: deprecated, don't use\n", Name);
return true;
}
}
}
Printf("\n\nWARNING: unrecognized flag '%s'; "
"use -help=1 to list all flags\n\n", Param);
return true;
}
// 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) {
SleepSeconds(600);
std::lock_guard<std::mutex> Lock(Mu);
Printf("pulse...\n");
}
}
static void WorkerThread(const std::string &Cmd, std::atomic<unsigned> *Counter,
unsigned NumJobs, std::atomic<bool> *HasErrors) {
while (true) {
unsigned 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);
if (ExitCode != 0)
*HasErrors = true;
std::lock_guard<std::mutex> Lock(Mu);
Printf("================== Job %u exited with exit code %d ============\n",
C, ExitCode);
fuzzer::CopyFileToErr(Log);
}
}
std::string CloneArgsWithoutX(const std::vector<std::string> &Args,
const char *X1, const char *X2) {
std::string Cmd;
for (auto &S : Args) {
if (FlagValue(S.c_str(), X1) || FlagValue(S.c_str(), X2))
continue;
Cmd += S + " ";
}
return Cmd;
}
static int RunInMultipleProcesses(const std::vector<std::string> &Args,
unsigned NumWorkers, unsigned NumJobs) {
std::atomic<unsigned> Counter(0);
std::atomic<bool> HasErrors(false);
std::string Cmd = CloneArgsWithoutX(Args, "jobs", "workers");
std::vector<std::thread> V;
std::thread Pulse(PulseThread);
Pulse.detach();
for (unsigned 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;
}
static void RssThread(Fuzzer *F, size_t RssLimitMb) {
while (true) {
SleepSeconds(1);
size_t Peak = GetPeakRSSMb();
if (Peak > RssLimitMb)
F->RssLimitCallback();
}
}
static void StartRssThread(Fuzzer *F, size_t RssLimitMb) {
if (!RssLimitMb) return;
std::thread T(RssThread, F, RssLimitMb);
T.detach();
}
int RunOneTest(Fuzzer *F, const char *InputFilePath, size_t MaxLen) {
Unit U = FileToVector(InputFilePath);
if (MaxLen && MaxLen < U.size())
U.resize(MaxLen);
F->RunOne(U.data(), U.size());
F->TryDetectingAMemoryLeak(U.data(), U.size(), true);
return 0;
}
static bool AllInputsAreFiles() {
if (Inputs->empty()) return false;
for (auto &Path : *Inputs)
if (!IsFile(Path))
return false;
return true;
}
static std::string GetDedupTokenFromFile(const std::string &Path) {
auto S = FileToString(Path);
auto Beg = S.find("DEDUP_TOKEN:");
if (Beg == std::string::npos)
return "";
auto End = S.find('\n', Beg);
if (End == std::string::npos)
return "";
return S.substr(Beg, End - Beg);
}
int CleanseCrashInput(const std::vector<std::string> &Args,
const FuzzingOptions &Options) {
if (Inputs->size() != 1 || !Flags.exact_artifact_path) {
Printf("ERROR: -cleanse_crash should be given one input file and"
" -exact_artifact_path\n");
exit(1);
}
std::string InputFilePath = Inputs->at(0);
std::string OutputFilePath = Flags.exact_artifact_path;
std::string BaseCmd =
CloneArgsWithoutX(Args, "cleanse_crash", "cleanse_crash");
auto InputPos = BaseCmd.find(" " + InputFilePath + " ");
assert(InputPos != std::string::npos);
BaseCmd.erase(InputPos, InputFilePath.size() + 1);
auto LogFilePath = DirPlusFile(
TmpDir(), "libFuzzerTemp." + std::to_string(GetPid()) + ".txt");
auto TmpFilePath = DirPlusFile(
TmpDir(), "libFuzzerTemp." + std::to_string(GetPid()) + ".repro");
auto LogFileRedirect = " > " + LogFilePath + " 2>&1 ";
auto Cmd = BaseCmd + " " + TmpFilePath + LogFileRedirect;
std::string CurrentFilePath = InputFilePath;
auto U = FileToVector(CurrentFilePath);
size_t Size = U.size();
const std::vector<uint8_t> ReplacementBytes = {' ', 0xff};
for (int NumAttempts = 0; NumAttempts < 5; NumAttempts++) {
bool Changed = false;
for (size_t Idx = 0; Idx < Size; Idx++) {
Printf("CLEANSE[%d]: Trying to replace byte %zd of %zd\n", NumAttempts,
Idx, Size);
uint8_t OriginalByte = U[Idx];
if (ReplacementBytes.end() != std::find(ReplacementBytes.begin(),
ReplacementBytes.end(),
OriginalByte))
continue;
for (auto NewByte : ReplacementBytes) {
U[Idx] = NewByte;
WriteToFile(U, TmpFilePath);
auto ExitCode = ExecuteCommand(Cmd);
RemoveFile(TmpFilePath);
if (!ExitCode) {
U[Idx] = OriginalByte;
} else {
Changed = true;
Printf("CLEANSE: Replaced byte %zd with 0x%x\n", Idx, NewByte);
WriteToFile(U, OutputFilePath);
break;
}
}
}
if (!Changed) break;
}
RemoveFile(LogFilePath);
return 0;
}
int MinimizeCrashInput(const std::vector<std::string> &Args,
const FuzzingOptions &Options) {
if (Inputs->size() != 1) {
Printf("ERROR: -minimize_crash should be given one input file\n");
exit(1);
}
std::string InputFilePath = Inputs->at(0);
std::string BaseCmd =
CloneArgsWithoutX(Args, "minimize_crash", "exact_artifact_path");
auto InputPos = BaseCmd.find(" " + InputFilePath + " ");
assert(InputPos != std::string::npos);
BaseCmd.erase(InputPos, InputFilePath.size() + 1);
if (Flags.runs <= 0 && Flags.max_total_time == 0) {
Printf("INFO: you need to specify -runs=N or "
"-max_total_time=N with -minimize_crash=1\n"
"INFO: defaulting to -max_total_time=600\n");
BaseCmd += " -max_total_time=600";
}
auto LogFilePath = DirPlusFile(
TmpDir(), "libFuzzerTemp." + std::to_string(GetPid()) + ".txt");
auto LogFileRedirect = " > " + LogFilePath + " 2>&1 ";
std::string CurrentFilePath = InputFilePath;
while (true) {
Unit U = FileToVector(CurrentFilePath);
Printf("CRASH_MIN: minimizing crash input: '%s' (%zd bytes)\n",
CurrentFilePath.c_str(), U.size());
auto Cmd = BaseCmd + " " + CurrentFilePath + LogFileRedirect;
Printf("CRASH_MIN: executing: %s\n", Cmd.c_str());
int ExitCode = ExecuteCommand(Cmd);
if (ExitCode == 0) {
Printf("ERROR: the input %s did not crash\n", CurrentFilePath.c_str());
exit(1);
}
Printf("CRASH_MIN: '%s' (%zd bytes) caused a crash. Will try to minimize "
"it further\n",
CurrentFilePath.c_str(), U.size());
auto DedupToken1 = GetDedupTokenFromFile(LogFilePath);
if (!DedupToken1.empty())
Printf("CRASH_MIN: DedupToken1: %s\n", DedupToken1.c_str());
std::string ArtifactPath =
Flags.exact_artifact_path
? Flags.exact_artifact_path
: Options.ArtifactPrefix + "minimized-from-" + Hash(U);
Cmd += " -minimize_crash_internal_step=1 -exact_artifact_path=" +
ArtifactPath;
Printf("CRASH_MIN: executing: %s\n", Cmd.c_str());
ExitCode = ExecuteCommand(Cmd);
CopyFileToErr(LogFilePath);
if (ExitCode == 0) {
if (Flags.exact_artifact_path) {
CurrentFilePath = Flags.exact_artifact_path;
WriteToFile(U, CurrentFilePath);
}
Printf("CRASH_MIN: failed to minimize beyond %s (%d bytes), exiting\n",
CurrentFilePath.c_str(), U.size());
break;
}
auto DedupToken2 = GetDedupTokenFromFile(LogFilePath);
if (!DedupToken2.empty())
Printf("CRASH_MIN: DedupToken2: %s\n", DedupToken2.c_str());
if (DedupToken1 != DedupToken2) {
if (Flags.exact_artifact_path) {
CurrentFilePath = Flags.exact_artifact_path;
WriteToFile(U, CurrentFilePath);
}
Printf("CRASH_MIN: mismatch in dedup tokens"
" (looks like a different bug). Won't minimize further\n");
break;
}
CurrentFilePath = ArtifactPath;
Printf("*********************************\n");
}
RemoveFile(LogFilePath);
return 0;
}
int MinimizeCrashInputInternalStep(Fuzzer *F, InputCorpus *Corpus) {
assert(Inputs->size() == 1);
std::string InputFilePath = Inputs->at(0);
Unit U = FileToVector(InputFilePath);
Printf("INFO: Starting MinimizeCrashInputInternalStep: %zd\n", U.size());
if (U.size() < 2) {
Printf("INFO: The input is small enough, exiting\n");
exit(0);
}
Corpus->AddToCorpus(U, 0);
F->SetMaxInputLen(U.size());
F->SetMaxMutationLen(U.size() - 1);
F->MinimizeCrashLoop(U);
Printf("INFO: Done MinimizeCrashInputInternalStep, no crashes found\n");
exit(0);
return 0;
}
int AnalyzeDictionary(Fuzzer *F, const std::vector<Unit>& Dict,
UnitVector& Corpus) {
Printf("Started dictionary minimization (up to %d tests)\n",
Dict.size() * Corpus.size() * 2);
// Scores and usage count for each dictionary unit.
std::vector<int> Scores(Dict.size());
std::vector<int> Usages(Dict.size());
std::vector<size_t> InitialFeatures;
std::vector<size_t> ModifiedFeatures;
for (auto &C : Corpus) {
// Get coverage for the testcase without modifications.
F->ExecuteCallback(C.data(), C.size());
InitialFeatures.clear();
TPC.CollectFeatures([&](size_t Feature) -> bool {
InitialFeatures.push_back(Feature);
return true;
});
for (size_t i = 0; i < Dict.size(); ++i) {
auto Data = C;
auto StartPos = std::search(Data.begin(), Data.end(),
Dict[i].begin(), Dict[i].end());
// Skip dictionary unit, if the testcase does not contain it.
if (StartPos == Data.end())
continue;
++Usages[i];
while (StartPos != Data.end()) {
// Replace all occurrences of dictionary unit in the testcase.
auto EndPos = StartPos + Dict[i].size();
for (auto It = StartPos; It != EndPos; ++It)
*It ^= 0xFF;
StartPos = std::search(EndPos, Data.end(),
Dict[i].begin(), Dict[i].end());
}
// Get coverage for testcase with masked occurrences of dictionary unit.
F->ExecuteCallback(Data.data(), Data.size());
ModifiedFeatures.clear();
TPC.CollectFeatures([&](size_t Feature) -> bool {
ModifiedFeatures.push_back(Feature);
return true;
});
if (InitialFeatures == ModifiedFeatures)
--Scores[i];
else
Scores[i] += 2;
}
}
Printf("###### Useless dictionary elements. ######\n");
for (size_t i = 0; i < Dict.size(); ++i) {
// Dictionary units with positive score are treated as useful ones.
if (Scores[i] > 0)
continue;
Printf("\"");
PrintASCII(Dict[i].data(), Dict[i].size(), "\"");
Printf(" # Score: %d, Used: %d\n", Scores[i], Usages[i]);
}
Printf("###### End of useless dictionary elements. ######\n");
return 0;
}
int FuzzerDriver(int *argc, char ***argv, UserCallback Callback) {
using namespace fuzzer;
assert(argc && argv && "Argument pointers cannot be nullptr");
std::string Argv0((*argv)[0]);
EF = new ExternalFunctions();
if (EF->LLVMFuzzerInitialize)
EF->LLVMFuzzerInitialize(argc, argv);
const std::vector<std::string> Args(*argv, *argv + *argc);
assert(!Args.empty());
ProgName = new std::string(Args[0]);
if (Argv0 != *ProgName) {
Printf("ERROR: argv[0] has been modified in LLVMFuzzerInitialize\n");
exit(1);
}
ParseFlags(Args);
if (Flags.help) {
PrintHelp();
return 0;
}
if (Flags.close_fd_mask & 2)
DupAndCloseStderr();
if (Flags.close_fd_mask & 1)
CloseStdout();
if (Flags.jobs > 0 && Flags.workers == 0) {
Flags.workers = std::min(NumberOfCpuCores() / 2, Flags.jobs);
if (Flags.workers > 1)
Printf("Running %u workers\n", Flags.workers);
}
if (Flags.workers > 0 && Flags.jobs > 0)
return RunInMultipleProcesses(Args, Flags.workers, Flags.jobs);
const size_t kMaxSaneLen = 1 << 20;
const size_t kMinDefaultLen = 64;
FuzzingOptions Options;
Options.Verbosity = Flags.verbosity;
Options.MaxLen = Flags.max_len;
Options.ExperimentalLenControl = Flags.experimental_len_control;
if (Flags.experimental_len_control && Flags.max_len == 64)
Options.MaxLen = 1 << 20;
Options.UnitTimeoutSec = Flags.timeout;
Options.ErrorExitCode = Flags.error_exitcode;
Options.TimeoutExitCode = Flags.timeout_exitcode;
Options.MaxTotalTimeSec = Flags.max_total_time;
Options.DoCrossOver = Flags.cross_over;
Options.MutateDepth = Flags.mutate_depth;
Options.UseCounters = Flags.use_counters;
Options.UseIndirCalls = Flags.use_indir_calls;
Options.UseMemmem = Flags.use_memmem;
Options.UseCmp = Flags.use_cmp;
Options.UseValueProfile = Flags.use_value_profile;
Options.Shrink = Flags.shrink;
Options.ShuffleAtStartUp = Flags.shuffle;
Options.PreferSmall = Flags.prefer_small;
Options.ReloadIntervalSec = Flags.reload;
Options.OnlyASCII = Flags.only_ascii;
Options.DetectLeaks = Flags.detect_leaks;
Options.TraceMalloc = Flags.trace_malloc;
Options.RssLimitMb = Flags.rss_limit_mb;
if (Flags.runs >= 0)
Options.MaxNumberOfRuns = Flags.runs;
if (!Inputs->empty() && !Flags.minimize_crash_internal_step)
Options.OutputCorpus = (*Inputs)[0];
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());
bool DoPlainRun = AllInputsAreFiles();
Options.SaveArtifacts =
!DoPlainRun || Flags.minimize_crash_internal_step;
Options.PrintNewCovPcs = Flags.print_pcs;
Options.PrintFinalStats = Flags.print_final_stats;
Options.PrintCorpusStats = Flags.print_corpus_stats;
Options.PrintCoverage = Flags.print_coverage;
Options.DumpCoverage = Flags.dump_coverage;
if (Flags.exit_on_src_pos)
Options.ExitOnSrcPos = Flags.exit_on_src_pos;
if (Flags.exit_on_item)
Options.ExitOnItem = Flags.exit_on_item;
unsigned Seed = Flags.seed;
// Initialize Seed.
if (Seed == 0)
Seed =
std::chrono::system_clock::now().time_since_epoch().count() + GetPid();
if (Flags.verbosity)
Printf("INFO: Seed: %u\n", Seed);
Random Rand(Seed);
auto *MD = new MutationDispatcher(Rand, Options);
auto *Corpus = new InputCorpus(Options.OutputCorpus);
auto *F = new Fuzzer(Callback, *Corpus, *MD, Options);
for (auto &U: Dictionary)
if (U.size() <= Word::GetMaxSize())
MD->AddWordToManualDictionary(Word(U.data(), U.size()));
StartRssThread(F, Flags.rss_limit_mb);
Options.HandleAbrt = Flags.handle_abrt;
Options.HandleBus = Flags.handle_bus;
Options.HandleFpe = Flags.handle_fpe;
Options.HandleIll = Flags.handle_ill;
Options.HandleInt = Flags.handle_int;
Options.HandleSegv = Flags.handle_segv;
Options.HandleTerm = Flags.handle_term;
Options.HandleXfsz = Flags.handle_xfsz;
SetSignalHandler(Options);
if (Flags.minimize_crash)
return MinimizeCrashInput(Args, Options);
if (Flags.minimize_crash_internal_step)
return MinimizeCrashInputInternalStep(F, Corpus);
if (Flags.cleanse_crash)
return CleanseCrashInput(Args, Options);
if (auto Name = Flags.run_equivalence_server) {
SMR.Destroy(Name);
if (!SMR.Create(Name)) {
Printf("ERROR: can't create shared memory region\n");
return 1;
}
Printf("INFO: EQUIVALENCE SERVER UP\n");
while (true) {
SMR.WaitClient();
size_t Size = SMR.ReadByteArraySize();
SMR.WriteByteArray(nullptr, 0);
const Unit tmp(SMR.GetByteArray(), SMR.GetByteArray() + Size);
F->RunOne(tmp.data(), tmp.size());
SMR.PostServer();
}
return 0;
}
if (auto Name = Flags.use_equivalence_server) {
if (!SMR.Open(Name)) {
Printf("ERROR: can't open shared memory region\n");
return 1;
}
Printf("INFO: EQUIVALENCE CLIENT UP\n");
}
if (DoPlainRun) {
Options.SaveArtifacts = false;
int Runs = std::max(1, Flags.runs);
Printf("%s: Running %zd inputs %d time(s) each.\n", ProgName->c_str(),
Inputs->size(), Runs);
for (auto &Path : *Inputs) {
auto StartTime = system_clock::now();
Printf("Running: %s\n", Path.c_str());
for (int Iter = 0; Iter < Runs; Iter++)
RunOneTest(F, Path.c_str(), Options.MaxLen);
auto StopTime = system_clock::now();
auto MS = duration_cast<milliseconds>(StopTime - StartTime).count();
Printf("Executed %s in %zd ms\n", Path.c_str(), (long)MS);
}
Printf("***\n"
"*** NOTE: fuzzing was not performed, you have only\n"
"*** executed the target code on a fixed set of inputs.\n"
"***\n");
F->PrintFinalStats();
exit(0);
}
if (Flags.merge) {
if (Options.MaxLen == 0)
F->SetMaxInputLen(kMaxSaneLen);
if (Flags.merge_control_file)
F->CrashResistantMergeInternalStep(Flags.merge_control_file);
else
F->CrashResistantMerge(Args, *Inputs,
Flags.load_coverage_summary,
Flags.save_coverage_summary);
exit(0);
}
size_t TemporaryMaxLen = Options.MaxLen ? Options.MaxLen : kMaxSaneLen;
UnitVector InitialCorpus;
for (auto &Inp : *Inputs) {
Printf("Loading corpus dir: %s\n", Inp.c_str());
ReadDirToVectorOfUnits(Inp.c_str(), &InitialCorpus, nullptr,
TemporaryMaxLen, /*ExitOnError=*/false);
}
if (Flags.analyze_dict) {
if (Dictionary.empty() || Inputs->empty()) {
Printf("ERROR: can't analyze dict without dict and corpus provided\n");
return 1;
}
if (AnalyzeDictionary(F, Dictionary, InitialCorpus)) {
Printf("Dictionary analysis failed\n");
exit(1);
}
Printf("Dictionary analysis suceeded\n");
exit(0);
}
if (Options.MaxLen == 0) {
size_t MaxLen = 0;
for (auto &U : InitialCorpus)
MaxLen = std::max(U.size(), MaxLen);
F->SetMaxInputLen(std::min(std::max(kMinDefaultLen, MaxLen), kMaxSaneLen));
}
if (InitialCorpus.empty()) {
InitialCorpus.push_back(Unit({'\n'})); // Valid ASCII input.
if (Options.Verbosity)
Printf("INFO: A corpus is not provided, starting from an empty corpus\n");
}
F->ShuffleAndMinimize(&InitialCorpus);
InitialCorpus.clear(); // Don't need this memory any more.
F->Loop();
if (Flags.verbosity)
Printf("Done %zd runs in %zd second(s)\n", F->getTotalNumberOfRuns(),
F->secondsSinceProcessStartUp());
F->PrintFinalStats();
exit(0); // Don't let F destroy itself.
}
// Storage for global ExternalFunctions object.
ExternalFunctions *EF = nullptr;
} // namespace fuzzer
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