| /* |
| * Copyright (C) 2019 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_TRACING_INTERNAL_SYSTEM_TRACING_BACKEND_H_ |
| #define SRC_TRACING_INTERNAL_SYSTEM_TRACING_BACKEND_H_ |
| |
| #include "perfetto/tracing/tracing_backend.h" |
| |
| namespace perfetto { |
| |
| namespace base { |
| class TaskRunner; |
| } |
| |
| class Producer; |
| |
| // A built-in implementation of TracingBackend that connects to the system |
| // tracing daemon (traced) via a UNIX socket using the perfetto built-in |
| // proto-based IPC mechanism. Instantiated when the embedder calls |
| // Tracing::Initialize(kSystemBackend). It allows to get app-traces fused |
| // together with system traces, useful to correlate on the timeline system |
| // events (e.g. scheduling slices from the kernel) with in-app events. |
| namespace internal { |
| class SystemTracingBackend : public TracingBackend { |
| public: |
| static SystemTracingBackend* GetInstance(); |
| |
| // TracingBackend implementation. |
| std::unique_ptr<ProducerEndpoint> ConnectProducer( |
| const ConnectProducerArgs&) override; |
| std::unique_ptr<ConsumerEndpoint> ConnectConsumer( |
| const ConnectConsumerArgs&) override; |
| |
| private: |
| SystemTracingBackend(); |
| }; |
| |
| } // namespace internal |
| } // namespace perfetto |
| |
| #endif // SRC_TRACING_INTERNAL_SYSTEM_TRACING_BACKEND_H_ |