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[fuzzer] add flag prefer_small_during_initial_shuffle, be a bit more verbose

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228235 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Kostya Serebryany
2015-02-04 23:42:42 +00:00
parent 2747f4aaf5
commit 5d85a10810
4 changed files with 32 additions and 6 deletions
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20
lib/Fuzzer/FuzzerLoop.cpp
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@ -48,10 +48,19 @@ void Fuzzer::AlarmCallback() {
}
void Fuzzer::ShuffleAndMinimize() {
bool PreferSmall =
(Options.PreferSmallDuringInitialShuffle == 1 ||
(Options.PreferSmallDuringInitialShuffle == -1 && rand() % 2));
if (Options.Verbosity)
std::cerr << "Shuffle: " << Corpus.size() << "\n";
std::cerr << "Shuffle: Size: " << Corpus.size()
<< " prefer small: " << PreferSmall
<< "\n";
std::vector<Unit> NewCorpus;
random_shuffle(Corpus.begin(), Corpus.end());
std::random_shuffle(Corpus.begin(), Corpus.end());
if (PreferSmall)
std::stable_sort(
Corpus.begin(), Corpus.end(),
[](const Unit &A, const Unit &B) { return A.size() < B.size(); });
size_t MaxCov = 0;
Unit &U = CurrentUnit;
for (const auto &C : Corpus) {
@ -64,7 +73,9 @@ void Fuzzer::ShuffleAndMinimize() {
MaxCov = NewCoverage;
NewCorpus.push_back(U);
if (Options.Verbosity >= 2)
std::cerr << "NEW0: " << NewCoverage << "\n";
std::cerr << "NEW0: " << NewCoverage
<< " L " << U.size()
<< "\n";
}
}
}
@ -109,8 +120,7 @@ size_t Fuzzer::RunOneMaximizeTotalCoverage(const Unit &U) {
TestOneInput(U.data(), U.size());
size_t NewCoverage = __sanitizer_get_total_unique_coverage();
if (!(TotalNumberOfRuns & (TotalNumberOfRuns - 1)) && Options.Verbosity) {
size_t Seconds =
duration_cast<seconds>(system_clock::now() - ProcessStartTime).count();
size_t Seconds = secondsSinceProcessStartUp();
std::cerr
<< "#" << TotalNumberOfRuns
<< "\tcov: " << NewCoverage