Пример #1
0
size_t Fuzzer::RecordBlockCoverage() {
  CHECK_WEAK_API_FUNCTION(__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("%p\n", CoverageBuf[i]);
  }

  return LastRecordedBlockCoverage;
}
Пример #2
0
// Experimental search heuristic: drilling.
// - Read, shuffle, execute and minimize the corpus.
// - Choose one random unit.
// - Reset the coverage.
// - Start fuzzing as if the chosen unit was the only element of the corpus.
// - When done, reset the coverage again.
// - Merge the newly created corpus into the original one.
void Fuzzer::Drill() {
  // The corpus is already read, shuffled, and minimized.
  assert(!Corpus.empty());
  Options.PrintNEW = false;  // Don't print NEW status lines when drilling.

  Unit U = ChooseUnitToMutate();

  CHECK_WEAK_API_FUNCTION(__sanitizer_reset_coverage);
  __sanitizer_reset_coverage();

  std::vector<Unit> SavedCorpus;
  SavedCorpus.swap(Corpus);
  Corpus.push_back(U);
  assert(Corpus.size() == 1);
  RunOne(U);
  PrintStats("DRILL ");
  std::string SavedOutputCorpusPath; // Don't write new units while drilling.
  SavedOutputCorpusPath.swap(Options.OutputCorpus);
  Loop();

  __sanitizer_reset_coverage();

  PrintStats("REINIT");
  SavedOutputCorpusPath.swap(Options.OutputCorpus);
  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++;
      WriteToOutputCorpus(U);
    }
  }
  PrintStats("MERGED");
  if (NumMerged && Options.Verbosity)
    Printf("Drilling discovered %zd new units\n", NumMerged);
}
Пример #3
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 static void Reset() {
   CHECK_WEAK_API_FUNCTION(__sanitizer_reset_coverage);
   __sanitizer_reset_coverage();
   PcMapResetCurrent();
 }
Пример #4
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void Fuzzer::SetDeathCallback() {
  CHECK_WEAK_API_FUNCTION(__sanitizer_set_death_callback);
  __sanitizer_set_death_callback(StaticDeathCallback);
}
Пример #5
0
size_t Fuzzer::RecordBlockCoverage() {
  CHECK_WEAK_API_FUNCTION(__sanitizer_get_total_unique_coverage);
  return LastRecordedBlockCoverage = __sanitizer_get_total_unique_coverage();
}