1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef SRC_TRACE_PROCESSOR_DYNAMIC_DESCENDANT_GENERATOR_H_ 18 #define SRC_TRACE_PROCESSOR_DYNAMIC_DESCENDANT_GENERATOR_H_ 19 20 #include "src/trace_processor/sqlite/db_sqlite_table.h" 21 22 #include "perfetto/ext/base/optional.h" 23 #include "src/trace_processor/storage/trace_storage.h" 24 25 namespace perfetto { 26 namespace trace_processor { 27 28 class TraceProcessorContext; 29 30 // Implements the following dynamic tables: 31 // * descendant_slice 32 // * descendant_slice_by_stack 33 // 34 // See docs/analysis/trace-processor for usage. 35 class DescendantGenerator : public DbSqliteTable::DynamicTableGenerator { 36 public: 37 enum class Descendant { kSlice = 1, kSliceByStack = 2 }; 38 39 DescendantGenerator(Descendant type, TraceProcessorContext* context); 40 41 Table::Schema CreateSchema() override; 42 std::string TableName() override; 43 uint32_t EstimateRowCount() override; 44 base::Status ValidateConstraints(const QueryConstraints&) override; 45 base::Status ComputeTable(const std::vector<Constraint>& cs, 46 const std::vector<Order>& ob, 47 const BitVector& cols_used, 48 std::unique_ptr<Table>& table_return) override; 49 50 // Returns a RowMap of slice IDs which are descendants of |slice_id|. Returns 51 // NULL if an invalid |slice_id| is given. This is used by 52 // ConnectedFlowGenerator to traverse flow indirectly connected flow events. 53 static base::Optional<RowMap> GetDescendantSlices( 54 const tables::SliceTable& slices, 55 SliceId slice_id); 56 57 private: 58 Descendant type_; 59 TraceProcessorContext* context_ = nullptr; 60 }; 61 62 } // namespace trace_processor 63 } // namespace perfetto 64 65 #endif // SRC_TRACE_PROCESSOR_DYNAMIC_DESCENDANT_GENERATOR_H_ 66