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Side by Side Diff: services/shell/standalone/tracer.h

Issue 2208783002: Make Tracing Service not use outgoing InterfaceProvider, update conventions (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: . Created 4 years, 4 months ago
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1 // Copyright 2015 The Chromium Authors. All rights reserved. 1 // Copyright 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef SERVICES_SHELL_STANDALONE_TRACER_H_ 5 #ifndef SERVICES_SHELL_STANDALONE_TRACER_H_
6 #define SERVICES_SHELL_STANDALONE_TRACER_H_ 6 #define SERVICES_SHELL_STANDALONE_TRACER_H_
7 7
8 #include <stddef.h> 8 #include <stddef.h>
9 #include <stdio.h> 9 #include <stdio.h>
10 10
11 #include <memory> 11 #include <memory>
12 #include <string> 12 #include <string>
13 13
14 #include "base/callback.h" 14 #include "base/callback.h"
15 #include "base/macros.h" 15 #include "base/macros.h"
16 #include "base/memory/ref_counted_memory.h" 16 #include "base/memory/ref_counted_memory.h"
17 #include "mojo/common/data_pipe_drainer.h" 17 #include "mojo/common/data_pipe_drainer.h"
18 #include "services/tracing/public/cpp/trace_provider_impl.h" 18 #include "services/tracing/public/cpp/provider.h"
19 #include "services/tracing/public/interfaces/tracing.mojom.h" 19 #include "services/tracing/public/interfaces/tracing.mojom.h"
20 20
21 namespace shell { 21 namespace shell {
22 22
23 // Tracer collects tracing data from base/trace_event and from externally 23 // Tracer collects tracing data from base/trace_event and from externally
24 // configured sources, aggregates it into a single stream, and writes it out to 24 // configured sources, aggregates it into a single stream, and writes it out to
25 // a file. It should be constructed very early in a process' lifetime before any 25 // a file. It should be constructed very early in a process' lifetime before any
26 // initialization that may be interesting to trace has occured and be shut down 26 // initialization that may be interesting to trace has occured and be shut down
27 // as late as possible to capture as much initialization/shutdown code as 27 // as late as possible to capture as much initialization/shutdown code as
28 // possible. 28 // possible.
29 class Tracer : public mojo::common::DataPipeDrainer::Client { 29 class Tracer : public mojo::common::DataPipeDrainer::Client {
30 public: 30 public:
31 Tracer(); 31 Tracer();
32 ~Tracer() override; 32 ~Tracer() override;
33 33
34 // Starts tracing the current process with the given set of categories. The 34 // Starts tracing the current process with the given set of categories. The
35 // tracing results will be saved into the specified filename when 35 // tracing results will be saved into the specified filename when
36 // StopAndFlushToFile() is called. 36 // StopAndFlushToFile() is called.
37 void Start(const std::string& categories, 37 void Start(const std::string& categories,
38 const std::string& duration_seconds_str, 38 const std::string& duration_seconds_str,
39 const std::string& filename); 39 const std::string& filename);
40 40
41 // Starts collecting data from the tracing service with the given set of 41 // Starts collecting data from the tracing service with the given set of
42 // categories. 42 // categories.
43 void StartCollectingFromTracingService( 43 void StartCollectingFromTracingService(
44 tracing::TraceCollectorPtr coordinator); 44 tracing::mojom::CollectorPtr coordinator);
45 45
46 // Stops tracing and flushes all collected trace data to the file specified in 46 // Stops tracing and flushes all collected trace data to the file specified in
47 // Start(). Blocks until the file write is complete. May be called after the 47 // Start(). Blocks until the file write is complete. May be called after the
48 // message loop is shut down. 48 // message loop is shut down.
49 void StopAndFlushToFile(); 49 void StopAndFlushToFile();
50 50
51 void ConnectToProvider( 51 void ConnectToProvider(tracing::mojom::ProviderRequest request);
52 mojo::InterfaceRequest<tracing::TraceProvider> request);
53 52
54 private: 53 private:
55 void StopTracingAndFlushToDisk(); 54 void StopTracingAndFlushToDisk();
56 55
57 // Called from the flush thread. When all data is collected this runs 56 // Called from the flush thread. When all data is collected this runs
58 // |done_callback| on the flush thread. 57 // |done_callback| on the flush thread.
59 void EndTraceAndFlush(const std::string& filename, 58 void EndTraceAndFlush(const std::string& filename,
60 const base::Closure& done_callback); 59 const base::Closure& done_callback);
61 60
62 // Called from the flush thread. 61 // Called from the flush thread.
63 void WriteTraceDataCollected( 62 void WriteTraceDataCollected(
64 const base::Closure& done_callback, 63 const base::Closure& done_callback,
65 const scoped_refptr<base::RefCountedString>& events_str, 64 const scoped_refptr<base::RefCountedString>& events_str,
66 bool has_more_events); 65 bool has_more_events);
67 66
68 // mojo::common::DataPipeDrainer::Client implementation. 67 // mojo::common::DataPipeDrainer::Client implementation.
69 void OnDataAvailable(const void* data, size_t num_bytes) override; 68 void OnDataAvailable(const void* data, size_t num_bytes) override;
70 void OnDataComplete() override; 69 void OnDataComplete() override;
71 70
72 // Emits a comma if needed. 71 // Emits a comma if needed.
73 void WriteCommaIfNeeded(); 72 void WriteCommaIfNeeded();
74 73
75 // Writes trace file footer and closes out the file. 74 // Writes trace file footer and closes out the file.
76 void WriteFooterAndClose(); 75 void WriteFooterAndClose();
77 76
78 // Set when connected to the tracing service. 77 // Set when connected to the tracing service.
79 tracing::TraceCollectorPtr coordinator_; 78 tracing::mojom::CollectorPtr coordinator_;
80 std::unique_ptr<mojo::common::DataPipeDrainer> drainer_; 79 std::unique_ptr<mojo::common::DataPipeDrainer> drainer_;
81 80
82 mojo::TraceProviderImpl trace_provider_impl_; 81 tracing::Provider provider_;
83 // Whether we're currently tracing. 82 // Whether we're currently tracing.
84 bool tracing_; 83 bool tracing_;
85 // Categories to trace. 84 // Categories to trace.
86 std::string categories_; 85 std::string categories_;
87 86
88 // Whether we've written the first chunk. 87 // Whether we've written the first chunk.
89 bool first_chunk_written_; 88 bool first_chunk_written_;
90 std::string trace_service_data_; 89 std::string trace_service_data_;
91 90
92 // Trace file, if open. 91 // Trace file, if open.
93 FILE* trace_file_; 92 FILE* trace_file_;
94 std::string trace_filename_; 93 std::string trace_filename_;
95 94
96 DISALLOW_COPY_AND_ASSIGN(Tracer); 95 DISALLOW_COPY_AND_ASSIGN(Tracer);
97 }; 96 };
98 97
99 } // namespace shell 98 } // namespace shell
100 99
101 #endif // SERVICES_SHELL_STANDALONE_TRACER_H_ 100 #endif // SERVICES_SHELL_STANDALONE_TRACER_H_
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