GCC Code Coverage Report
Directory: ../ Exec Total Coverage
File: /home/iojs/build/workspace/node-test-commit-linux-coverage-daily/nodes/benchmark/out/../src/tracing/node_trace_buffer.h Lines: 4 6 66.7 %
Date: 2019-08-17 22:35:23 Branches: 1 4 25.0 %

Line Branch Exec Source
1
#ifndef SRC_TRACING_NODE_TRACE_BUFFER_H_
2
#define SRC_TRACING_NODE_TRACE_BUFFER_H_
3
4
#include "tracing/agent.h"
5
#include "node_mutex.h"
6
#include "libplatform/v8-tracing.h"
7
8
#include <atomic>
9
10
namespace node {
11
namespace tracing {
12
13
using v8::platform::tracing::TraceBuffer;
14
using v8::platform::tracing::TraceBufferChunk;
15
using v8::platform::tracing::TraceObject;
16
17
// forward declaration
18
class NodeTraceBuffer;
19
20
144
class InternalTraceBuffer {
21
 public:
22
  InternalTraceBuffer(size_t max_chunks, uint32_t id, Agent* agent);
23
24
  TraceObject* AddTraceEvent(uint64_t* handle);
25
  TraceObject* GetEventByHandle(uint64_t handle);
26
  void Flush(bool blocking);
27
1942
  bool IsFull() const {
28

1942
    return total_chunks_ == max_chunks_ && chunks_[total_chunks_ - 1]->IsFull();
29
  }
30
  bool IsFlushing() const {
31
    return flushing_;
32
  }
33
34
 private:
35
  uint64_t MakeHandle(size_t chunk_index, uint32_t chunk_seq,
36
                      size_t event_index) const;
37
  void ExtractHandle(uint64_t handle, uint32_t* buffer_id, size_t* chunk_index,
38
                     uint32_t* chunk_seq, size_t* event_index) const;
39
2128
  size_t Capacity() const { return max_chunks_ * TraceBufferChunk::kChunkSize; }
40
41
  Mutex mutex_;
42
  bool flushing_;
43
  size_t max_chunks_;
44
  Agent* agent_;
45
  std::vector<std::unique_ptr<TraceBufferChunk>> chunks_;
46
  size_t total_chunks_ = 0;
47
  uint32_t current_chunk_seq_ = 1;
48
  uint32_t id_;
49
};
50
51
class NodeTraceBuffer : public TraceBuffer {
52
 public:
53
  NodeTraceBuffer(size_t max_chunks, Agent* agent, uv_loop_t* tracing_loop);
54
  ~NodeTraceBuffer() override;
55
56
  TraceObject* AddTraceEvent(uint64_t* handle) override;
57
  TraceObject* GetEventByHandle(uint64_t handle) override;
58
  bool Flush() override;
59
60
  static const size_t kBufferChunks = 1024;
61
62
 private:
63
  bool TryLoadAvailableBuffer();
64
  static void NonBlockingFlushSignalCb(uv_async_t* signal);
65
  static void ExitSignalCb(uv_async_t* signal);
66
67
  uv_loop_t* tracing_loop_;
68
  uv_async_t flush_signal_;
69
  uv_async_t exit_signal_;
70
  bool exited_ = false;
71
  // Used exclusively for exit logic.
72
  Mutex exit_mutex_;
73
  // Used to wait until async handles have been closed.
74
  ConditionVariable exit_cond_;
75
  std::atomic<InternalTraceBuffer*> current_buf_;
76
  InternalTraceBuffer buffer1_;
77
  InternalTraceBuffer buffer2_;
78
};
79
80
}  // namespace tracing
81
}  // namespace node
82
83
#endif  // SRC_TRACING_NODE_TRACE_BUFFER_H_