//===----------------------------------------------------------------------===//
#include "FuzzerInternal.h"
-#include <sanitizer/coverage_interface.h>
#include <algorithm>
+#if defined(__has_include)
+# if __has_include(<sanitizer/coverage_interface.h>)
+# include <sanitizer/coverage_interface.h>
+# endif
+#endif
+
extern "C" {
// Re-declare some of the sanitizer functions as "weak" so that
-// libFuzzer can be linked w/o the sanitizers and sanitizer-coveragte
+// libFuzzer can be linked w/o the sanitizers and sanitizer-coverage
// (in which case it will complain at start-up time).
__attribute__((weak)) void __sanitizer_print_stack_trace();
__attribute__((weak)) void __sanitizer_reset_coverage();
__attribute__((weak)) size_t __sanitizer_get_number_of_counters();
__attribute__((weak))
uintptr_t __sanitizer_update_counter_bitset_and_clear_counters(uint8_t *bitset);
+__attribute__((weak)) uintptr_t
+__sanitizer_get_coverage_pc_buffer(uintptr_t **data);
}
namespace fuzzer {
}
void Fuzzer::PrintStats(const char *Where, const char *End) {
- if (!Options.Verbosity) return;
size_t Seconds = secondsSinceProcessStartUp();
size_t ExecPerSec = (Seconds ? TotalNumberOfRuns / Seconds : 0);
+
+ if (Options.OutputCSV) {
+ static bool csvHeaderPrinted = false;
+ if (!csvHeaderPrinted) {
+ csvHeaderPrinted = true;
+ Printf("runs,block_cov,bits,cc_cov,corpus,execs_per_sec,tbms,reason\n");
+ }
+ Printf("%zd,%zd,%zd,%zd,%zd,%zd,%zd,%s\n", TotalNumberOfRuns,
+ LastRecordedBlockCoverage, TotalBits(),
+ LastRecordedCallerCalleeCoverage, Corpus.size(), ExecPerSec,
+ TotalNumberOfExecutedTraceBasedMutations, Where);
+ }
+
+ if (!Options.Verbosity)
+ return;
Printf("#%zd\t%s", TotalNumberOfRuns, Where);
if (LastRecordedBlockCoverage)
Printf(" cov: %zd", LastRecordedBlockCoverage);
CurrentUnit.insert(CurrentUnit.begin(), X.begin(), X.end());
if (RunOne(CurrentUnit)) {
Corpus.push_back(X);
- if (Options.Verbosity >= 1)
- PrintStats("RELOAD");
+ PrintStats("RELOAD");
}
}
}
auto UnitStopTime = system_clock::now();
auto TimeOfUnit =
duration_cast<seconds>(UnitStopTime - UnitStartTime).count();
- if (!(TotalNumberOfRuns & (TotalNumberOfRuns - 1))
- && secondsSinceProcessStartUp() >= 2
- && Options.Verbosity)
+ if (!(TotalNumberOfRuns & (TotalNumberOfRuns - 1)) &&
+ secondsSinceProcessStartUp() >= 2)
PrintStats("pulse ");
if (TimeOfUnit > TimeOfLongestUnitInSeconds &&
TimeOfUnit >= Options.ReportSlowUnits) {
}
void Fuzzer::ExecuteCallback(const Unit &U) {
- int Res = USF.TargetFunction(U.data(), U.size());
+ const uint8_t *Data = U.data();
+ uint8_t EmptyData;
+ if (!Data)
+ Data = &EmptyData;
+ int Res = USF.TargetFunction(Data, U.size());
(void)Res;
assert(Res == 0);
}
size_t Fuzzer::RecordBlockCoverage() {
CHECK_WEAK_API_FUNCTION(__sanitizer_get_total_unique_coverage);
- return LastRecordedBlockCoverage = __sanitizer_get_total_unique_coverage();
+ uintptr_t PrevCoverage = LastRecordedBlockCoverage;
+ LastRecordedBlockCoverage = __sanitizer_get_total_unique_coverage();
+
+ if (PrevCoverage == LastRecordedBlockCoverage || !Options.PrintNewCovPcs)
+ return LastRecordedBlockCoverage;
+
+ uintptr_t PrevBufferLen = LastCoveragePcBufferLen;
+ uintptr_t *CoverageBuf;
+ LastCoveragePcBufferLen = __sanitizer_get_coverage_pc_buffer(&CoverageBuf);
+ assert(CoverageBuf);
+ for (size_t i = PrevBufferLen; i < LastCoveragePcBufferLen; ++i) {
+ Printf("0x%x\n", CoverageBuf[i]);
+ }
+
+ return LastRecordedBlockCoverage;
}
size_t Fuzzer::RecordCallerCalleeCoverage() {
if (!Options.SaveArtifacts)
return;
std::string Path = Options.ArtifactPrefix + Prefix + Hash(U);
+ if (!Options.ExactArtifactPath.empty())
+ Path = Options.ExactArtifactPath; // Overrides ArtifactPrefix.
WriteToFile(U, Path);
Printf("artifact_prefix='%s'; Test unit written to %s\n",
Options.ArtifactPrefix.c_str(), Path.c_str());
- if (U.size() <= kMaxUnitSizeToPrint) {
- Printf("Base64: ");
- PrintFileAsBase64(Path);
- }
+ if (U.size() <= kMaxUnitSizeToPrint)
+ Printf("Base64: %s\n", Base64(U).c_str());
}
void Fuzzer::SaveCorpus() {
return;
PrintStats("NEW ", "");
if (Options.Verbosity) {
- Printf(" L: %zd", U.size());
- if (U.size() < 30) {
- Printf(" ");
- PrintUnitInASCII(U, "\t");
- Print(U);
- }
+ Printf(" L: %zd ", U.size());
+ USF.PrintMutationSequence();
Printf("\n");
}
}
Printf("Merge: written %zd out of %zd units\n", NumMerged, NumTried);
}
-void Fuzzer::MutateAndTestOne(Unit *U) {
+void Fuzzer::MutateAndTestOne() {
+ auto &U = CurrentUnit;
+ USF.StartMutationSequence();
+
+ U = ChooseUnitToMutate();
+
for (int i = 0; i < Options.MutateDepth; i++) {
- StartTraceRecording();
- size_t Size = U->size();
- U->resize(Options.MaxLen);
- size_t NewSize = USF.Mutate(U->data(), Size, U->size());
+ size_t Size = U.size();
+ U.resize(Options.MaxLen);
+ size_t NewSize = USF.Mutate(U.data(), Size, U.size());
assert(NewSize > 0 && "Mutator returned empty unit");
assert(NewSize <= (size_t)Options.MaxLen &&
"Mutator return overisized unit");
- U->resize(NewSize);
- RunOneAndUpdateCorpus(*U);
- size_t NumTraceBasedMutations = StopTraceRecording();
- 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);
- }
- }
+ U.resize(NewSize);
+ if (i == 0)
+ StartTraceRecording();
+ RunOneAndUpdateCorpus(U);
+ StopTraceRecording();
}
}
PrintStats("REINIT");
SavedOutputCorpusPath.swap(Options.OutputCorpus);
- for (auto &U : SavedCorpus)
+ for (auto &U : SavedCorpus) {
+ CurrentUnit = U;
RunOne(U);
+ }
PrintStats("MERGE ");
Options.PrintNEW = true;
size_t NumMerged = 0;
for (auto &U : Corpus) {
+ CurrentUnit = U;
if (RunOne(U)) {
PrintStatusForNewUnit(U);
NumMerged++;
}
void Fuzzer::Loop() {
+ system_clock::time_point LastCorpusReload = system_clock::now();
+ if (Options.DoCrossOver)
+ USF.SetCorpus(&Corpus);
while (true) {
- size_t J1 = ChooseUnitIdxToMutate();;
SyncCorpus();
- RereadOutputCorpus();
+ auto Now = system_clock::now();
+ if (duration_cast<seconds>(Now - LastCorpusReload).count()) {
+ RereadOutputCorpus();
+ LastCorpusReload = Now;
+ }
if (TotalNumberOfRuns >= Options.MaxNumberOfRuns)
- return;
+ break;
if (Options.MaxTotalTimeSec > 0 &&
secondsSinceProcessStartUp() >
static_cast<size_t>(Options.MaxTotalTimeSec))
- return;
- CurrentUnit = Corpus[J1];
- // Optionally, cross with another unit.
- if (Options.DoCrossOver && USF.GetRand().RandBool()) {
- size_t J2 = ChooseUnitIdxToMutate();
- 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 returned overisized unit");
- CurrentUnit.resize(NewSize);
- }
- }
+ break;
// Perform several mutations and runs.
- MutateAndTestOne(&CurrentUnit);
+ MutateAndTestOne();
}
+
+ PrintStats("DONE ", "\n");
}
void Fuzzer::SyncCorpus() {
projects / oota-llvm.git / blobdiff