1 /* 2 * Copyright (C) 2018 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_IMPORTERS_COMMON_EVENT_TRACKER_H_ 18 #define SRC_TRACE_PROCESSOR_IMPORTERS_COMMON_EVENT_TRACKER_H_ 19 20 #include <array> 21 #include <limits> 22 23 #include "perfetto/ext/base/string_view.h" 24 #include "perfetto/ext/base/utils.h" 25 #include "src/trace_processor/storage/trace_storage.h" 26 27 namespace perfetto { 28 namespace trace_processor { 29 30 class TraceProcessorContext; 31 32 // Tracks sched events, instants, and counters. 33 class EventTracker { 34 public: 35 explicit EventTracker(TraceProcessorContext*); 36 EventTracker(const EventTracker&) = delete; 37 EventTracker& operator=(const EventTracker&) = delete; 38 virtual ~EventTracker(); 39 40 // Adds a counter event to the counters table returning the index of the 41 // newly added row. 42 virtual base::Optional<CounterId> PushCounter(int64_t timestamp, 43 double value, 44 TrackId track_id); 45 46 // Adds a counter event to the counters table for counter events which 47 // should be associated with a process but only have a thread context 48 // (e.g. rss_stat events). 49 // 50 // This function will resolve the utid to a upid when the events are 51 // flushed (see |FlushPendingEvents()|). 52 virtual base::Optional<CounterId> PushProcessCounterForThread( 53 int64_t timestamp, 54 double value, 55 StringId name_id, 56 UniqueTid utid); 57 58 // This method is called when a instant event is seen in the trace. 59 virtual InstantId PushInstant(int64_t timestamp, 60 StringId name_id, 61 int64_t ref, 62 RefType ref_type, 63 bool resolve_utid_to_upid = false); 64 65 // Called at the end of trace to flush any events which are pending to the 66 // storage. 67 void FlushPendingEvents(); 68 69 // For SchedEventTracker. max_timestamp()70 int64_t max_timestamp() const { return max_timestamp_; } UpdateMaxTimestamp(int64_t ts)71 void UpdateMaxTimestamp(int64_t ts) { 72 max_timestamp_ = std::max(ts, max_timestamp_); 73 } 74 75 private: 76 // Represents a counter event which is currently pending upid resolution. 77 struct PendingUpidResolutionCounter { 78 uint32_t row = 0; 79 StringId name_id = kNullStringId; 80 UniqueTid utid = 0; 81 }; 82 83 // Represents a instant event which is currently pending upid resolution. 84 struct PendingUpidResolutionInstant { 85 uint32_t row = 0; 86 UniqueTid utid = 0; 87 }; 88 89 // Store the rows in the counters table which need upids resolved. 90 std::vector<PendingUpidResolutionCounter> pending_upid_resolution_counter_; 91 92 // Store the rows in the instants table which need upids resolved. 93 std::vector<PendingUpidResolutionInstant> pending_upid_resolution_instant_; 94 95 // Timestamp of the previous event. Used to discard events arriving out 96 // of order. 97 int64_t max_timestamp_ = 0; 98 99 TraceProcessorContext* const context_; 100 }; 101 } // namespace trace_processor 102 } // namespace perfetto 103 104 #endif // SRC_TRACE_PROCESSOR_IMPORTERS_COMMON_EVENT_TRACKER_H_ 105