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 // Built-in implementations of TracingProducerBackend and TracingConsumerBackend 32 // that connect to the system tracing daemon (traced) via a UNIX socket using 33 // the perfetto built-in proto-based IPC mechanism. Instantiated when the 34 // embedder calls Tracing::Initialize(kSystemBackend). They allow to get 35 // app-traces fused together with system traces, useful to correlate on the 36 // timeline system events (e.g. scheduling slices from the kernel) with in-app 37 // events. 38 namespace internal { 39 40 // Producer backend 41 class PERFETTO_EXPORT_COMPONENT SystemProducerTracingBackend 42 : public TracingProducerBackend { 43 public: 44 static TracingProducerBackend* GetInstance(); 45 46 std::unique_ptr<ProducerEndpoint> ConnectProducer( 47 const ConnectProducerArgs&) override; 48 49 private: 50 SystemProducerTracingBackend(); 51 }; 52 53 // Consumer backend 54 class PERFETTO_EXPORT_COMPONENT SystemConsumerTracingBackend 55 : public TracingConsumerBackend { 56 public: 57 static TracingConsumerBackend* GetInstance(); 58 59 std::unique_ptr<ConsumerEndpoint> ConnectConsumer( 60 const ConnectConsumerArgs&) override; 61 62 private: 63 SystemConsumerTracingBackend(); 64 }; 65 66 } // namespace internal 67 } // namespace perfetto 68 69 #endif // INCLUDE_PERFETTO_TRACING_INTERNAL_SYSTEM_TRACING_BACKEND_H_ 70