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/default_socket.h" 22 #include "perfetto/tracing/tracing_backend.h" 23 24 namespace perfetto { 25 26 namespace base { 27 class TaskRunner; 28 } 29 30 class Producer; 31 32 // Built-in implementations of TracingProducerBackend and TracingConsumerBackend 33 // that connect to the system tracing daemon (traced) via a UNIX socket using 34 // the perfetto built-in proto-based IPC mechanism. Instantiated when the 35 // embedder calls Tracing::Initialize(kSystemBackend). They allow to get 36 // app-traces fused together with system traces, useful to correlate on the 37 // timeline system events (e.g. scheduling slices from the kernel) with in-app 38 // events. 39 namespace internal { 40 41 // Producer backend 42 class PERFETTO_EXPORT_COMPONENT SystemProducerTracingBackend 43 : public TracingProducerBackend { 44 public: 45 static TracingProducerBackend* GetInstance(); 46 47 std::unique_ptr<ProducerEndpoint> ConnectProducer( 48 const ConnectProducerArgs&) override; 49 50 private: 51 SystemProducerTracingBackend(); 52 }; 53 54 // Consumer backend 55 class PERFETTO_EXPORT_COMPONENT SystemConsumerTracingBackend 56 : public TracingConsumerBackend { 57 public: 58 static TracingConsumerBackend* GetInstance(); 59 60 std::unique_ptr<ConsumerEndpoint> ConnectConsumer( 61 const ConnectConsumerArgs&) override; 62 63 private: 64 SystemConsumerTracingBackend(); 65 }; 66 67 } // namespace internal 68 } // namespace perfetto 69 70 #endif // INCLUDE_PERFETTO_TRACING_INTERNAL_SYSTEM_TRACING_BACKEND_H_ 71