1 /* 2 * Copyright (C) 2019 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 INCLUDE_PERFETTO_TRACING_INTERNAL_SYSTEM_TRACING_BACKEND_H_ 18 #define INCLUDE_PERFETTO_TRACING_INTERNAL_SYSTEM_TRACING_BACKEND_H_ 19 20 #include "perfetto/base/export.h" 21 #include "perfetto/tracing/tracing_backend.h" 22 23 namespace perfetto { 24 25 namespace base { 26 class TaskRunner; 27 } 28 29 class Producer; 30 31 // A built-in implementation of TracingBackend that connects to the system 32 // tracing daemon (traced) via a UNIX socket using the perfetto built-in 33 // proto-based IPC mechanism. Instantiated when the embedder calls 34 // Tracing::Initialize(kSystemBackend). It allows to get app-traces fused 35 // together with system traces, useful to correlate on the timeline system 36 // events (e.g. scheduling slices from the kernel) with in-app events. 37 namespace internal { 38 class PERFETTO_EXPORT SystemTracingBackend : public TracingBackend { 39 public: 40 static TracingBackend* GetInstance(); 41 42 // TracingBackend implementation. 43 std::unique_ptr<ProducerEndpoint> ConnectProducer( 44 const ConnectProducerArgs&) override; 45 std::unique_ptr<ConsumerEndpoint> ConnectConsumer( 46 const ConnectConsumerArgs&) override; 47 48 private: 49 SystemTracingBackend(); 50 }; 51 52 } // namespace internal 53 } // namespace perfetto 54 55 #endif // INCLUDE_PERFETTO_TRACING_INTERNAL_SYSTEM_TRACING_BACKEND_H_ 56