/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SRC_TRACE_PROCESSOR_SLICE_TABLE_H_
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#define SRC_TRACE_PROCESSOR_SLICE_TABLE_H_
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#include "src/trace_processor/storage_table.h"
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namespace perfetto {
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namespace trace_processor {
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class QueryConstraints;
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class TraceStorage;
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// A virtual table that allows to query slices coming from userspace events
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// such as chromium TRACE_EVENT macros. Conversely to "shced" slices, these
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// slices can be nested and form stacks.
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// The current implementation of this table is extremely simple and not
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// particularly efficient, as it delegates all the sorting and filtering to
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// the SQLite query engine.
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class SliceTable : public StorageTable {
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public:
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SliceTable(sqlite3*, const TraceStorage* storage);
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static void RegisterTable(sqlite3* db, const TraceStorage* storage);
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// StorageTable implementation.
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StorageSchema CreateStorageSchema() override;
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uint32_t RowCount() override;
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int BestIndex(const QueryConstraints&, BestIndexInfo*) override;
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private:
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uint32_t EstimateCost(const QueryConstraints&);
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std::vector<const char*> ref_types_;
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const TraceStorage* const storage_;
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};
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} // namespace trace_processor
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} // namespace perfetto
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#endif // SRC_TRACE_PROCESSOR_SLICE_TABLE_H_
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