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Revert "[libFuzzer] Use std::discrete_distribution for input selection." 

This reverts r339973 due to msan.test failing on
sanitizer-x86_64-linux-fuzzer bot.

llvm-svn: 339976
This commit is contained in:
Matt Morehouse 2018-08-17 01:30:27 +00:00
parent 9e86844d54
commit be57e8e328
1 changed files with 7 additions and 4 deletions
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11
compiler-rt/lib/fuzzer/FuzzerCorpus.h
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@ -174,7 +174,7 @@ class InputCorpus {
// Returns an index of random unit from the corpus to mutate.
size_t ChooseUnitIdxToMutate(Random &Rand) {
size_t Idx = CorpusDistribution(Rand);
size_t Idx = static_cast<size_t>(CorpusDistribution(Rand));
assert(Idx < Inputs.size());
return Idx;
}
@ -276,7 +276,9 @@ private:
void UpdateCorpusDistribution() {
size_t N = Inputs.size();
assert(N);
Intervals.resize(N + 1);
Weights.resize(N);
std::iota(Intervals.begin(), Intervals.end(), 0);
for (size_t i = 0; i < N; i++)
Weights[i] = Inputs[i]->NumFeatures
? (i + 1) * (Inputs[i]->HasFocusFunction ? 1000 : 1)
@ -289,11 +291,12 @@ private:
Printf("%f ", Weights[i]);
Printf("Weights\n");
}
CorpusDistribution =
std::discrete_distribution<size_t>(Weights.begin(), Weights.end());
CorpusDistribution = std::piecewise_constant_distribution<double>(
Intervals.begin(), Intervals.end(), Weights.begin());
}
std::discrete_distribution<size_t> CorpusDistribution;
std::piecewise_constant_distribution<double> CorpusDistribution;
Vector<double> Intervals;
Vector<double> Weights;
std::unordered_set<std::string> Hashes;