#include <algorithm>
namespace fuzzer {
+static const size_t kMaxUnitSizeToPrint = 4096;
// Only one Fuzzer per process.
static Fuzzer *F;
Printf("DEATH:\n");
Print(CurrentUnit, "\n");
PrintUnitInASCIIOrTokens(CurrentUnit, "\n");
- WriteToCrash(CurrentUnit, "crash-");
+ WriteUnitToFileWithPrefix(CurrentUnit, "crash-");
}
void Fuzzer::StaticAlarmCallback() {
Printf("ALARM: working on the last Unit for %zd seconds\n", Seconds);
Printf(" and the timeout value is %d (use -timeout=N to change)\n",
Options.UnitTimeoutSec);
- Print(CurrentUnit, "\n");
+ if (CurrentUnit.size() <= kMaxUnitSizeToPrint)
+ Print(CurrentUnit, "\n");
PrintUnitInASCIIOrTokens(CurrentUnit, "\n");
- WriteToCrash(CurrentUnit, "timeout-");
+ WriteUnitToFileWithPrefix(CurrentUnit, "timeout-");
exit(1);
}
}
if (!Options.Verbosity) return;
size_t Seconds = secondsSinceProcessStartUp();
size_t ExecPerSec = (Seconds ? TotalNumberOfRuns / Seconds : 0);
- Printf("#%zd\t%s cov %zd bits %zd units %zd exec/s %zd %s", TotalNumberOfRuns,
- Where, Cov, TotalBits(), Corpus.size(), ExecPerSec, End);
+ Printf("#%zd\t%s cov: %zd bits: %zd units: %zd exec/s: %zd",
+ TotalNumberOfRuns, Where, Cov, TotalBits(), Corpus.size(), ExecPerSec);
+ if (TotalNumberOfExecutedTraceBasedMutations)
+ Printf(" tbm: %zd", TotalNumberOfExecutedTraceBasedMutations);
+ Printf("%s", End);
}
void Fuzzer::RereadOutputCorpus() {
void Fuzzer::ShuffleAndMinimize() {
size_t MaxCov = 0;
- bool PreferSmall =
- (Options.PreferSmallDuringInitialShuffle == 1 ||
- (Options.PreferSmallDuringInitialShuffle == -1 && rand() % 2));
+ bool PreferSmall = (Options.PreferSmallDuringInitialShuffle == 1 ||
+ (Options.PreferSmallDuringInitialShuffle == -1 &&
+ USF.GetRand().RandBool()));
if (Options.Verbosity)
Printf("PreferSmall: %d\n", PreferSmall);
PrintStats("READ ", 0);
std::vector<Unit> NewCorpus;
- std::random_shuffle(Corpus.begin(), Corpus.end());
+ std::random_shuffle(Corpus.begin(), Corpus.end(), USF.GetRand());
if (PreferSmall)
std::stable_sort(
Corpus.begin(), Corpus.end(),
U.clear();
size_t Last = std::min(First + Options.MaxLen, C.size());
U.insert(U.begin(), C.begin() + First, C.begin() + Last);
+ if (Options.OnlyASCII)
+ ToASCII(U);
size_t NewCoverage = RunOne(U);
if (NewCoverage) {
MaxCov = NewCoverage;
size_t Fuzzer::RunOne(const Unit &U) {
UnitStartTime = system_clock::now();
TotalNumberOfRuns++;
- size_t Res = 0;
- if (Options.UseFullCoverageSet)
- Res = RunOneMaximizeFullCoverageSet(U);
- else
- Res = RunOneMaximizeTotalCoverage(U);
+ size_t Res = RunOneMaximizeTotalCoverage(U);
auto UnitStopTime = system_clock::now();
auto TimeOfUnit =
duration_cast<seconds>(UnitStopTime - UnitStartTime).count();
- if (TimeOfUnit > TimeOfLongestUnitInSeconds) {
+ if (TimeOfUnit > TimeOfLongestUnitInSeconds &&
+ TimeOfUnit >= Options.ReportSlowUnits) {
TimeOfLongestUnitInSeconds = TimeOfUnit;
- Printf("Longest unit: %zd s:\n", TimeOfLongestUnitInSeconds);
- Print(U, "\n");
+ Printf("Slowest unit: %zd s:\n", TimeOfLongestUnitInSeconds);
+ if (U.size() <= kMaxUnitSizeToPrint)
+ Print(U, "\n");
+ WriteUnitToFileWithPrefix(U, "slow-unit-");
}
return Res;
}
-void Fuzzer::RunOneAndUpdateCorpus(const Unit &U) {
+void Fuzzer::RunOneAndUpdateCorpus(Unit &U) {
if (TotalNumberOfRuns >= Options.MaxNumberOfRuns)
return;
+ if (Options.OnlyASCII)
+ ToASCII(U);
ReportNewCoverage(RunOne(U), U);
}
-static uintptr_t HashOfArrayOfPCs(uintptr_t *PCs, uintptr_t NumPCs) {
- uintptr_t Res = 0;
- for (uintptr_t i = 0; i < NumPCs; i++) {
- Res = (Res + PCs[i]) * 7;
- }
- return Res;
-}
-
Unit Fuzzer::SubstituteTokens(const Unit &U) const {
Unit Res;
for (auto Idx : U) {
}
}
-// Experimental.
-// Fuly reset the current coverage state, run a single unit,
-// compute a hash function from the full coverage set,
-// return non-zero if the hash value is new.
-// This produces tons of new units and as is it's only suitable for small tests,
-// e.g. test/FullCoverageSetTest.cpp. FIXME: make it scale.
-size_t Fuzzer::RunOneMaximizeFullCoverageSet(const Unit &U) {
- __sanitizer_reset_coverage();
- ExecuteCallback(U);
- uintptr_t *PCs;
- uintptr_t NumPCs =__sanitizer_get_coverage_guards(&PCs);
- if (FullCoverageSets.insert(HashOfArrayOfPCs(PCs, NumPCs)).second)
- return FullCoverageSets.size();
- return 0;
-}
-
size_t Fuzzer::RunOneMaximizeTotalCoverage(const Unit &U) {
size_t NumCounters = __sanitizer_get_number_of_counters();
if (Options.UseCounters) {
WriteToFile(U, Path);
if (Options.Verbosity >= 2)
Printf("Written to %s\n", Path.c_str());
+ assert(!Options.OnlyASCII || IsASCII(U));
}
-void Fuzzer::WriteToCrash(const Unit &U, const char *Prefix) {
+void Fuzzer::WriteUnitToFileWithPrefix(const Unit &U, const char *Prefix) {
std::string Path = Prefix + Hash(U);
WriteToFile(U, Path);
- Printf("CRASHED; file written to %s\nBase64: ", Path.c_str());
- PrintFileAsBase64(Path);
+ Printf("Test unit written to %s\n", Path.c_str());
+ if (U.size() <= kMaxUnitSizeToPrint) {
+ Printf("Base64: ");
+ PrintFileAsBase64(Path);
+ }
}
void Fuzzer::SaveCorpus() {
U->resize(NewSize);
RunOneAndUpdateCorpus(*U);
size_t NumTraceBasedMutations = StopTraceRecording();
- for (size_t j = 0; j < NumTraceBasedMutations; j++) {
- ApplyTraceBasedMutation(j, U);
- RunOneAndUpdateCorpus(*U);
+ size_t TBMWidth =
+ std::min((size_t)Options.TBMWidth, NumTraceBasedMutations);
+ size_t TBMDepth =
+ std::min((size_t)Options.TBMDepth, NumTraceBasedMutations);
+ Unit BackUp = *U;
+ for (size_t w = 0; w < TBMWidth; w++) {
+ *U = BackUp;
+ for (size_t d = 0; d < TBMDepth; d++) {
+ TotalNumberOfExecutedTraceBasedMutations++;
+ ApplyTraceBasedMutation(USF.GetRand()(NumTraceBasedMutations), U);
+ RunOneAndUpdateCorpus(*U);
+ }
}
}
}
-void Fuzzer::Loop(size_t NumIterations) {
- for (size_t i = 1; i <= NumIterations; i++) {
+void Fuzzer::Loop() {
+ for (auto &U: Options.Dictionary)
+ USF.GetMD().AddWordToDictionary(U.data(), U.size());
+
+ while (true) {
for (size_t J1 = 0; J1 < Corpus.size(); J1++) {
SyncCorpus();
RereadOutputCorpus();
if (TotalNumberOfRuns >= Options.MaxNumberOfRuns)
return;
- // First, simply mutate the unit w/o doing crosses.
+ if (Options.MaxTotalTimeSec > 0 &&
+ secondsSinceProcessStartUp() >
+ static_cast<size_t>(Options.MaxTotalTimeSec))
+ return;
CurrentUnit = Corpus[J1];
- MutateAndTestOne(&CurrentUnit);
- // Now, cross with others.
- if (Options.DoCrossOver && !Corpus[J1].empty()) {
- for (size_t J2 = 0; J2 < Corpus.size(); J2++) {
+ // Optionally, cross with another unit.
+ if (Options.DoCrossOver && USF.GetRand().RandBool()) {
+ size_t J2 = USF.GetRand()(Corpus.size());
+ if (!Corpus[J1].empty() && !Corpus[J2].empty()) {
+ assert(!Corpus[J2].empty());
CurrentUnit.resize(Options.MaxLen);
size_t NewSize = USF.CrossOver(
Corpus[J1].data(), Corpus[J1].size(), Corpus[J2].data(),
Corpus[J2].size(), CurrentUnit.data(), CurrentUnit.size());
assert(NewSize > 0 && "CrossOver returned empty unit");
assert(NewSize <= (size_t)Options.MaxLen &&
- "CrossOver return overisized unit");
+ "CrossOver returned overisized unit");
CurrentUnit.resize(NewSize);
- MutateAndTestOne(&CurrentUnit);
}
}
+ // Perform several mutations and runs.
+ MutateAndTestOne(&CurrentUnit);
}
}
}
projects / oota-llvm.git / blobdiff