1 /*
2  * Copyright (C) 2017 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 SIMPLE_PERF_INPLACE_SAMPLER_CLIENT_H_
18 #define SIMPLE_PERF_INPLACE_SAMPLER_CLIENT_H_
19 
20 #include <memory>
21 #include <set>
22 #include <vector>
23 
24 #include "event_attr.h"
25 #include "record.h"
26 #include "UnixSocket.h"
27 
28 class InplaceSamplerClient {
29  public:
30   static std::unique_ptr<InplaceSamplerClient> Create(const perf_event_attr& attr, pid_t pid,
31                                                       const std::set<pid_t>& tids);
32   uint64_t Id() const;
IsClosed()33   bool IsClosed() {
34     return conn_->IsClosed();
35   }
36   bool StartPolling(IOEventLoop& loop, const std::function<bool(Record*)>& record_callback,
37                     const std::function<bool()>& close_callback);
38   bool StopProfiling(IOEventLoop& loop, const std::function<bool()>& close_callback);
39 
40  private:
41   InplaceSamplerClient(const perf_event_attr& attr, pid_t pid, const std::set<pid_t>& tids);
42   bool ConnectServer();
43   bool SendStartProfilingMessage();
44   bool HandleMessage(const UnixSocketMessage& msg);
45 
46   const perf_event_attr attr_;
47   const pid_t pid_;
48   const std::set<pid_t> tids_;
49   uint32_t sample_freq_;
50   std::unique_ptr<UnixSocketConnection> conn_;
51   std::function<bool(Record*)> record_callback_;
52   bool got_start_profiling_reply_msg_;
53 };
54 
55 #endif  // SIMPLE_PERF_INPLACE_SAMPLER_CLIENT_H_
56