| /* |
| * Copyright (C) 2023 The Android Open Source Project |
| * |
| * 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 SRC_TRACE_PROCESSOR_IMPORTERS_COMMON_CLOCK_CONVERTER_H_ |
| #define SRC_TRACE_PROCESSOR_IMPORTERS_COMMON_CLOCK_CONVERTER_H_ |
| |
| #include <stdint.h> |
| |
| #include <array> |
| #include <cinttypes> |
| #include <map> |
| #include <random> |
| #include <set> |
| #include <vector> |
| |
| #include "perfetto/base/logging.h" |
| #include "perfetto/ext/base/status_or.h" |
| #include "perfetto/ext/base/string_utils.h" |
| #include "src/trace_processor/storage/trace_storage.h" |
| #include "src/trace_processor/types/trace_processor_context.h" |
| |
| #include "protos/perfetto/common/builtin_clock.pbzero.h" |
| #include "protos/perfetto/trace/clock_snapshot.pbzero.h" |
| |
| namespace perfetto { |
| namespace trace_processor { |
| |
| // Used for conversion to REAL and MONO clocks for provided timestamps. Can only |
| // be used after trace parsing. Only works if there has been at least one |
| // snapshot with a target clock. Data is based on clock snapshots table. |
| class ClockConverter { |
| public: |
| using ClockId = int64_t; |
| using Timestamp = int64_t; |
| |
| explicit ClockConverter(TraceProcessorContext*); |
| |
| // Converts trace time to REAL clock as string. |
| base::StatusOr<std::string> ToAbsTime(Timestamp ts) { |
| base::StatusOr<Timestamp> real_ts = FromTraceTime(kRealClock, ts); |
| if (!real_ts.ok()) |
| return real_ts.status(); |
| return TimeToStr(*real_ts); |
| } |
| |
| // Converts trace time to MONO clock time. |
| base::StatusOr<Timestamp> ToMonotonic(Timestamp ts) { |
| return FromTraceTime(kMonoClock, ts); |
| } |
| |
| private: |
| static constexpr int64_t kRealClock = |
| protos::pbzero::ClockSnapshot::Clock::REALTIME; |
| static constexpr int64_t kMonoClock = protos::pbzero::BUILTIN_CLOCK_MONOTONIC; |
| |
| // Timeline uses Trace Time clock as keys and other clocks time as values. |
| using Timeline = std::map<Timestamp, Timestamp>; |
| |
| // Reads the clocks snapshots table and fetches the data required for |
| // conversion. We initialize timelines of only selected clocks to minimize |
| // memory usage. Currently those are MONO and REAL clocks. |
| void MaybeInitialize(); |
| |
| // Converts trace time to provided clock. |
| base::StatusOr<Timestamp> FromTraceTime(ClockId, Timestamp); |
| |
| // Converts timestamp to string. |
| std::string TimeToStr(Timestamp); |
| |
| TraceProcessorContext* context_; |
| bool is_initialized = false; |
| base::FlatHashMap<ClockId, Timeline> timelines_; |
| }; |
| |
| } // namespace trace_processor |
| } // namespace perfetto |
| |
| #endif // SRC_TRACE_PROCESSOR_IMPORTERS_COMMON_CLOCK_CONVERTER_H_ |