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#pragma once
#include <yql/essentials/minikql/mkql_node.h>
#include <yql/essentials/minikql/computation/mkql_block_impl.h>
#include <util/random/random.h>
#include <util/generic/ptr.h>
// This file defines a fuzzing framework for MiniKQL blocks. It provides interfaces and implementations
// for controlled mutation of block data structures to test edge cases and ensure robustness.
// The framework supports various fuzzing strategies like removing optional bitmasks and shifting offsets.
namespace NKikimr::NMiniKQL {
struct TFuzzOptions {
bool FuzzZeroOptionalBitmaskRemove = false;
bool FuzzOffsetShift = false;
static TFuzzOptions FuzzAll() {
return TFuzzOptions{.FuzzZeroOptionalBitmaskRemove = true, .FuzzOffsetShift = true};
}
};
class IFuzzer {
public:
virtual ~IFuzzer() = default;
virtual NYql::NUdf::TUnboxedValue Fuzz(NYql::NUdf::TUnboxedValue input,
const THolderFactory& holderFactory,
arrow::MemoryPool& memoryPool,
IRandomProvider& randomProvider) const = 0;
};
using TFuzzerList = TVector<THolder<IFuzzer>>;
class TFuzzerHolder {
public:
static constexpr ui64 EmptyFuzzerId = 0;
TFuzzerHolder();
~TFuzzerHolder();
ui64 ReserveFuzzer();
void CreateFuzzers(TFuzzOptions options, ui64 fuzzerIndex, const TType* type, const TTypeEnvironment& env);
void ClearFuzzers();
NYql::NUdf::TUnboxedValue ApplyFuzzers(NYql::NUdf::TUnboxedValue input,
ui64 fuzzIdx,
const THolderFactory& holderFactory,
arrow::MemoryPool& memoryPool,
IRandomProvider& randomProvider) const;
private:
std::map<ui64, TFuzzerList> NodeToFuzzOptions_;
ui64 FuzzerIdx_ = 1;
};
} // namespace NKikimr::NMiniKQL
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