| // Copyright (c) 2019 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_FUZZER_PASS_CONSTRUCT_COMPOSITES_H_ |
| #define SOURCE_FUZZ_FUZZER_PASS_CONSTRUCT_COMPOSITES_H_ |
| |
| #include "source/fuzz/fuzzer_pass.h" |
| |
| #include <map> |
| #include <vector> |
| |
| namespace spvtools { |
| namespace fuzz { |
| |
| // A fuzzer pass for constructing composite objects from smaller objects. |
| class FuzzerPassConstructComposites : public FuzzerPass { |
| public: |
| FuzzerPassConstructComposites( |
| opt::IRContext* ir_context, FactManager* fact_manager, |
| FuzzerContext* fuzzer_context, |
| protobufs::TransformationSequence* transformations); |
| |
| ~FuzzerPassConstructComposites(); |
| |
| void Apply() override; |
| |
| private: |
| // Used to map a type id to relevant instructions whose result type matches |
| // the type id. |
| typedef std::map<uint32_t, std::vector<opt::Instruction*>> |
| TypeIdToInstructions; |
| |
| // Considers all instructions that are available at |inst| - instructions |
| // whose results could be packed into a composite - and updates |
| // |type_id_to_available_instructions| so that each such instruction is |
| // associated with its the id of its result type. |
| void RecordAvailableInstruction( |
| opt::Instruction* inst, |
| TypeIdToInstructions* type_id_to_available_instructions); |
| |
| // Attempts to find suitable instruction result ids from the values of |
| // |type_id_to_available_instructions| that would allow a composite of type |
| // |array_type| to be constructed. Returns said ids if they can be found. |
| // Returns |nullptr| otherwise. |
| std::unique_ptr<std::vector<uint32_t>> TryConstructingArrayComposite( |
| const opt::analysis::Array& array_type, |
| const TypeIdToInstructions& type_id_to_available_instructions); |
| |
| // Similar to TryConstructingArrayComposite, but for matrices. |
| std::unique_ptr<std::vector<uint32_t>> TryConstructingMatrixComposite( |
| const opt::analysis::Matrix& matrix_type, |
| const TypeIdToInstructions& type_id_to_available_instructions); |
| |
| // Similar to TryConstructingArrayComposite, but for structs. |
| std::unique_ptr<std::vector<uint32_t>> TryConstructingStructComposite( |
| const opt::analysis::Struct& struct_type, |
| const TypeIdToInstructions& type_id_to_available_instructions); |
| |
| // Similar to TryConstructingArrayComposite, but for vectors. |
| std::unique_ptr<std::vector<uint32_t>> TryConstructingVectorComposite( |
| const opt::analysis::Vector& vector_type, |
| const TypeIdToInstructions& type_id_to_available_instructions); |
| }; |
| |
| } // namespace fuzz |
| } // namespace spvtools |
| |
| #endif // SOURCE_FUZZ_FUZZER_PASS_CONSTRUCT_COMPOSITES_H_ |