1 /* 2 * Copyright (c) 2021 Huawei Device Co., Ltd. 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 EBPF_PROCESS_MAPS_TABLE_H 16 #define EBPF_PROCESS_MAPS_TABLE_H 17 18 #include "table_base.h" 19 #include "trace_stdtype.h" 20 21 namespace SysTuning { 22 namespace TraceStreamer { 23 class EbpfProcessMapsTable : public TableBase { 24 public: 25 explicit EbpfProcessMapsTable(const TraceDataCache* dataCache); 26 ~EbpfProcessMapsTable() override; 27 std::unique_ptr<TableBase::Cursor> CreateCursor() override; 28 29 private: 30 void EstimateFilterCost(FilterConstraints& fc, EstimatedIndexInfo& ei) override; 31 // filter out by operator[=, >, <...] from column(ID) 32 bool CanFilterId(const char op, size_t& rowCount); 33 void FilterByConstraint(FilterConstraints& fc, double& filterCost, size_t rowCount); 34 35 class Cursor : public TableBase::Cursor { 36 public: 37 explicit Cursor(const TraceDataCache* dataCache, TableBase* table); 38 ~Cursor() override; 39 int Filter(const FilterConstraints& fc, sqlite3_value** argv) override; 40 int Column(int column) const override; 41 42 void FilterId(unsigned char op, sqlite3_value* argv); 43 44 private: 45 const EbpfProcessMaps& ebpfProcessMapsObj_; 46 }; 47 }; 48 } // namespace TraceStreamer 49 } // namespace SysTuning 50 #endif // EBPF_PROCESS_MAPS_TABLE_H 51