SPIRV-Tools/source/fuzz/pass_management/repeated_pass_manager.h
Vasyl Teliman 43cfa9bc1d
spirv-fuzz: Add persistent state to the fuzzer (#4137)
Adds persistent state to the fuzzer so that it can be used as a custom
mutator for mutation-based fuzzing.
2021-03-03 15:34:53 +00:00

76 lines
2.8 KiB
C++

// Copyright (c) 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SOURCE_FUZZ_REPEATED_PASS_MANAGER_H_
#define SOURCE_FUZZ_REPEATED_PASS_MANAGER_H_
#include "source/fuzz/fuzzer_context.h"
#include "source/fuzz/fuzzer_pass.h"
#include "source/fuzz/pass_management/repeated_pass_instances.h"
#include "source/fuzz/pass_management/repeated_pass_recommender.h"
#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
namespace spvtools {
namespace fuzz {
// Each field of this enum corresponds to an available repeated pass
// strategy, and is used to decide which kind of RepeatedPassManager object
// to create.
enum class RepeatedPassStrategy {
kSimple,
kRandomWithRecommendations,
kLoopedWithRecommendations
};
// An interface to encapsulate the manner in which the sequence of repeated
// passes that are applied during fuzzing is chosen. An implementation of this
// interface could, for example, keep track of the history of passes that have
// been run and bias the selection of future passes according to this history.
class RepeatedPassManager {
public:
RepeatedPassManager(FuzzerContext* fuzzer_context,
RepeatedPassInstances* pass_instances);
virtual ~RepeatedPassManager();
// Returns the fuzzer pass instance that should be run next. The
// transformations that have been applied so far are provided via
// |applied_transformations| and can be used to influence the decision.
virtual FuzzerPass* ChoosePass(
const protobufs::TransformationSequence& applied_transformations) = 0;
// Creates a corresponding RepeatedPassManager based on the |strategy|.
static std::unique_ptr<RepeatedPassManager> Create(
RepeatedPassStrategy strategy, FuzzerContext* fuzzer_context,
RepeatedPassInstances* pass_instances,
RepeatedPassRecommender* pass_recommender);
protected:
FuzzerContext* GetFuzzerContext() { return fuzzer_context_; }
RepeatedPassInstances* GetPassInstances() { return pass_instances_; }
private:
// Provided in order to allow the pass manager to make random decisions.
FuzzerContext* fuzzer_context_;
// The repeated fuzzer passes that are enabled.
RepeatedPassInstances* pass_instances_;
};
} // namespace fuzz
} // namespace spvtools
#endif // SOURCE_FUZZ_REPEATED_PASS_MANAGER_H_