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https://github.com/KhronosGroup/SPIRV-Tools
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43cfa9bc1d
Adds persistent state to the fuzzer so that it can be used as a custom mutator for mutation-based fuzzing.
76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
// Copyright (c) 2020 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SOURCE_FUZZ_REPEATED_PASS_MANAGER_H_
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#define SOURCE_FUZZ_REPEATED_PASS_MANAGER_H_
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#include "source/fuzz/fuzzer_context.h"
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#include "source/fuzz/fuzzer_pass.h"
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#include "source/fuzz/pass_management/repeated_pass_instances.h"
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#include "source/fuzz/pass_management/repeated_pass_recommender.h"
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#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
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namespace spvtools {
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namespace fuzz {
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// Each field of this enum corresponds to an available repeated pass
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// strategy, and is used to decide which kind of RepeatedPassManager object
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// to create.
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enum class RepeatedPassStrategy {
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kSimple,
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kRandomWithRecommendations,
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kLoopedWithRecommendations
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};
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// An interface to encapsulate the manner in which the sequence of repeated
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// passes that are applied during fuzzing is chosen. An implementation of this
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// interface could, for example, keep track of the history of passes that have
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// been run and bias the selection of future passes according to this history.
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class RepeatedPassManager {
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public:
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RepeatedPassManager(FuzzerContext* fuzzer_context,
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RepeatedPassInstances* pass_instances);
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virtual ~RepeatedPassManager();
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// Returns the fuzzer pass instance that should be run next. The
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// transformations that have been applied so far are provided via
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// |applied_transformations| and can be used to influence the decision.
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virtual FuzzerPass* ChoosePass(
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const protobufs::TransformationSequence& applied_transformations) = 0;
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// Creates a corresponding RepeatedPassManager based on the |strategy|.
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static std::unique_ptr<RepeatedPassManager> Create(
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RepeatedPassStrategy strategy, FuzzerContext* fuzzer_context,
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RepeatedPassInstances* pass_instances,
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RepeatedPassRecommender* pass_recommender);
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protected:
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FuzzerContext* GetFuzzerContext() { return fuzzer_context_; }
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RepeatedPassInstances* GetPassInstances() { return pass_instances_; }
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private:
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// Provided in order to allow the pass manager to make random decisions.
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FuzzerContext* fuzzer_context_;
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// The repeated fuzzer passes that are enabled.
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RepeatedPassInstances* pass_instances_;
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_REPEATED_PASS_MANAGER_H_
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