| // 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. |
| |
| #include "source/fuzz/pass_management/repeated_pass_manager_random_with_recommendations.h" |
| |
| namespace spvtools { |
| namespace fuzz { |
| |
| RepeatedPassManagerRandomWithRecommendations:: |
| RepeatedPassManagerRandomWithRecommendations( |
| FuzzerContext* fuzzer_context, RepeatedPassInstances* pass_instances, |
| RepeatedPassRecommender* pass_recommender) |
| : RepeatedPassManager(fuzzer_context, pass_instances), |
| pass_recommender_(pass_recommender), |
| num_transformations_applied_before_last_pass_choice_(0), |
| last_pass_choice_(nullptr) {} |
| |
| RepeatedPassManagerRandomWithRecommendations:: |
| ~RepeatedPassManagerRandomWithRecommendations() = default; |
| |
| FuzzerPass* RepeatedPassManagerRandomWithRecommendations::ChoosePass( |
| const protobufs::TransformationSequence& applied_transformations) { |
| assert(static_cast<uint32_t>(applied_transformations.transformation_size()) >= |
| num_transformations_applied_before_last_pass_choice_ && |
| "The number of applied transformations should not decrease."); |
| if (last_pass_choice_ != nullptr && |
| static_cast<uint32_t>(applied_transformations.transformation_size()) > |
| num_transformations_applied_before_last_pass_choice_) { |
| // The last pass had some effect, so we make future recommendations based on |
| // it. |
| for (auto future_pass : |
| pass_recommender_->GetFuturePassRecommendations(*last_pass_choice_)) { |
| recommended_passes_.push_back(future_pass); |
| } |
| } |
| |
| FuzzerPass* result; |
| if (recommended_passes_.empty() || GetFuzzerContext()->ChooseEven()) { |
| auto& passes = GetPassInstances()->GetPasses(); |
| result = passes[GetFuzzerContext()->RandomIndex(passes)].get(); |
| } else { |
| result = recommended_passes_.front(); |
| recommended_passes_.pop_front(); |
| } |
| assert(result != nullptr && "A pass must have been chosen."); |
| last_pass_choice_ = result; |
| return result; |
| } |
| |
| } // namespace fuzz |
| } // namespace spvtools |