1 // Copyright (c) 2020 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef SOURCE_FUZZ_COUNTER_OVERFLOW_ID_SOURCE_H_ 16 #define SOURCE_FUZZ_COUNTER_OVERFLOW_ID_SOURCE_H_ 17 18 #include "source/fuzz/overflow_id_source.h" 19 20 namespace spvtools { 21 namespace fuzz { 22 23 // A source of overflow ids that uses a counter to provide successive ids from 24 // a given starting value. 25 class CounterOverflowIdSource : public OverflowIdSource { 26 public: 27 // |first_available_id| is the starting value for the counter. 28 explicit CounterOverflowIdSource(uint32_t first_available_id); 29 30 // Always returns true. 31 bool HasOverflowIds() const override; 32 33 // Returns the current counter value and increments the counter. 34 // TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/2541) We should 35 // account for the case where the maximum allowed id is reached. 36 uint32_t GetNextOverflowId() override; 37 38 const std::unordered_set<uint32_t>& GetIssuedOverflowIds() const override; 39 40 private: 41 uint32_t next_available_id_; 42 43 std::unordered_set<uint32_t> issued_ids_; 44 }; 45 46 } // namespace fuzz 47 } // namespace spvtools 48 49 #endif // SOURCE_FUZZ_OVERFLOW_ID_SOURCE_COUNTER_H_ 50