| /* |
| * Copyright (C) 2018 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_PROFILING_MEMORY_SOCKET_LISTENER_H_ |
| #define SRC_PROFILING_MEMORY_SOCKET_LISTENER_H_ |
| |
| #include "perfetto/base/unix_socket.h" |
| #include "src/profiling/memory/bookkeeping.h" |
| #include "src/profiling/memory/queue_messages.h" |
| #include "src/profiling/memory/record_reader.h" |
| #include "src/profiling/memory/unwinding.h" |
| #include "src/profiling/memory/wire_protocol.h" |
| |
| #include <map> |
| #include <memory> |
| |
| namespace perfetto { |
| namespace profiling { |
| |
| class SocketListener : public base::UnixSocket::EventListener { |
| private: |
| struct ProcessInfo { |
| ProcessInfo(pid_t p, ClientConfiguration cfg) |
| : pid(p), client_config(std::move(cfg)) {} |
| |
| pid_t pid; |
| size_t active_profile_sessions = 0; |
| ClientConfiguration client_config; |
| std::set<base::UnixSocket*> sockets; |
| }; |
| |
| public: |
| friend class ProfilingSession; |
| class ProfilingSession { |
| public: |
| friend class SocketListener; |
| |
| ProfilingSession() : ProfilingSession(nullptr, nullptr) {} |
| |
| ProfilingSession(ProfilingSession&& other) |
| : process_info_(other.process_info_), listener_(other.listener_) { |
| other.listener_ = nullptr; |
| } |
| |
| ~ProfilingSession() { |
| if (listener_) |
| listener_->RemoveProfilingSession(process_info_); |
| } |
| ProfilingSession& operator=(ProfilingSession&& other) { |
| process_info_ = other.process_info_; |
| listener_ = other.listener_; |
| other.listener_ = nullptr; |
| return *this; |
| } |
| |
| operator bool() const { return listener_ != nullptr; } |
| |
| ProfilingSession(const ProfilingSession&) = delete; |
| ProfilingSession& operator=(const ProfilingSession&) = delete; |
| |
| private: |
| ProfilingSession(ProcessInfo* process_info, SocketListener* listener) |
| : process_info_(process_info), listener_(listener) {} |
| |
| ProcessInfo* process_info_; |
| SocketListener* listener_ = nullptr; |
| }; |
| |
| SocketListener(std::function<void(UnwindingRecord)> fn, |
| BookkeepingThread* bookkeeping_thread) |
| : callback_function_(std::move(fn)), |
| bookkeeping_thread_(bookkeeping_thread) {} |
| void OnDisconnect(base::UnixSocket* self) override; |
| void OnNewIncomingConnection( |
| base::UnixSocket* self, |
| std::unique_ptr<base::UnixSocket> new_connection) override; |
| void OnDataAvailable(base::UnixSocket* self) override; |
| |
| ProfilingSession ExpectPID(pid_t pid, ClientConfiguration cfg); |
| |
| private: |
| struct Entry { |
| Entry(std::unique_ptr<base::UnixSocket> s) : sock(std::move(s)) {} |
| // Only here for ownership of the object. |
| const std::unique_ptr<base::UnixSocket> sock; |
| RecordReader record_reader; |
| bool recv_fds = false; |
| // The sockets own the metadata for a particular PID. When the last socket |
| // for a PID disconnects, the metadata is destroyed. The unwinding threads |
| // get a weak_ptr, which will be invalidated so we do not unwind for |
| // processes that have already gone away. |
| // |
| // This does not get initialized in the ctor because the file descriptors |
| // only get received after the first Receive call of the socket. |
| std::shared_ptr<UnwindingMetadata> unwinding_metadata; |
| }; |
| |
| void RecordReceived(base::UnixSocket*, size_t, std::unique_ptr<uint8_t[]>); |
| |
| void AddProfilingSession(ProcessInfo* process_info); |
| void RemoveProfilingSession(ProcessInfo* process_info); |
| |
| std::map<base::UnixSocket*, Entry> sockets_; |
| std::map<pid_t, std::weak_ptr<UnwindingMetadata>> unwinding_metadata_; |
| std::map<pid_t, ProcessInfo> process_info_; |
| std::function<void(UnwindingRecord)> callback_function_; |
| BookkeepingThread* const bookkeeping_thread_; |
| }; |
| |
| } // namespace profiling |
| } // namespace perfetto |
| |
| #endif // SRC_PROFILING_MEMORY_SOCKET_LISTENER_H_ |