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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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 CHROME_BROWSER_METRICS_SUBPROCESS_METRICS_PROVIDER_H_ | 5 #ifndef CHROME_BROWSER_METRICS_SUBPROCESS_METRICS_PROVIDER_H_ |
6 #define CHROME_BROWSER_METRICS_SUBPROCESS_METRICS_PROVIDER_H_ | 6 #define CHROME_BROWSER_METRICS_SUBPROCESS_METRICS_PROVIDER_H_ |
7 | 7 |
8 #include <map> | |
8 #include <memory> | 9 #include <memory> |
9 #include <set> | 10 #include <vector> |
10 | 11 |
11 #include "base/gtest_prod_util.h" | 12 #include "base/gtest_prod_util.h" |
12 #include "base/id_map.h" | 13 #include "base/metrics/statistics_recorder.h" |
13 #include "base/scoped_observer.h" | 14 #include "base/scoped_observer.h" |
14 #include "base/threading/thread_checker.h" | 15 #include "base/synchronization/lock.h" |
15 #include "components/metrics/metrics_provider.h" | 16 #include "components/metrics/metrics_provider.h" |
16 #include "content/public/browser/notification_observer.h" | 17 #include "content/public/browser/notification_observer.h" |
17 #include "content/public/browser/notification_registrar.h" | 18 #include "content/public/browser/notification_registrar.h" |
18 #include "content/public/browser/render_process_host_observer.h" | 19 #include "content/public/browser/render_process_host_observer.h" |
19 | 20 |
20 namespace base { | 21 namespace base { |
21 class PersistentHistogramAllocator; | 22 class PersistentHistogramAllocator; |
22 class SharedPersistentMemoryAllocator; | 23 class SharedPersistentMemoryAllocator; |
23 } | 24 } |
24 | 25 |
25 // SubprocessMetricsProvider gathers and logs histograms stored in shared | 26 // SubprocessMetricsProvider gathers and logs histograms stored in shared |
26 // memory segments between processes. | 27 // memory segments between processes. |
27 class SubprocessMetricsProvider : public metrics::MetricsProvider, | 28 class SubprocessMetricsProvider |
28 public content::NotificationObserver, | 29 : public metrics::MetricsProvider, |
29 public content::RenderProcessHostObserver { | 30 public base::StatisticsRecorder::MetricsDisplay, |
31 public content::NotificationObserver, | |
32 public content::RenderProcessHostObserver { | |
30 public: | 33 public: |
31 SubprocessMetricsProvider(); | 34 SubprocessMetricsProvider(); |
32 ~SubprocessMetricsProvider() override; | 35 ~SubprocessMetricsProvider() override; |
33 | 36 |
34 private: | 37 private: |
35 friend class SubprocessMetricsProviderTest; | 38 friend class SubprocessMetricsProviderTest; |
36 | 39 |
37 // Indicates subprocess to be monitored with unique id for later reference. | 40 // Indicates subprocess to be monitored with unique id for later reference. |
38 // Metrics reporting will read histograms from it and upload them to UMA. | 41 // Metrics reporting will read histograms from it and upload them to UMA. |
39 void RegisterSubprocessAllocator( | 42 void RegisterSubprocessAllocator( |
40 int id, | 43 int id, |
41 std::unique_ptr<base::PersistentHistogramAllocator> allocator); | 44 std::unique_ptr<base::PersistentHistogramAllocator> allocator); |
42 | 45 |
43 // Indicates that a subprocess has exited and is thus finished with the | 46 // Indicates that a subprocess has exited and is thus finished with the |
44 // allocator it was using. | 47 // allocator it was using. |
45 void DeregisterSubprocessAllocator(int id); | 48 void DeregisterSubprocessAllocator(int id); |
46 | 49 |
47 // Report all histograms of a given allocator to the snapshot-manager. | 50 // Report histograms of a given allocator to the snapshot-manager. If |
51 // |query| is not empty, only histograms that contain that string will | |
52 // be recorded. If |absolute| is true, no delta from the previous snapshot | |
53 // will be done. Only one caller, the caller that uploads to UMA, is | |
54 // allowed to calcuate deltas because they are not independent. | |
48 void RecordHistogramSnapshotsFromAllocator( | 55 void RecordHistogramSnapshotsFromAllocator( |
49 base::HistogramSnapshotManager* snapshot_manager, | 56 base::HistogramSnapshotManager* snapshot_manager, |
57 const std::string& query, | |
58 bool absolute, | |
50 int id, | 59 int id, |
51 base::PersistentHistogramAllocator* allocator); | 60 base::PersistentHistogramAllocator* allocator); |
52 | 61 |
53 // metrics::MetricsProvider: | 62 // metrics::MetricsProvider: |
54 void OnRecordingEnabled() override; | 63 void OnRecordingEnabled() override; |
55 void OnRecordingDisabled() override; | 64 void OnRecordingDisabled() override; |
56 void RecordHistogramSnapshots( | 65 void RecordHistogramSnapshots( |
57 base::HistogramSnapshotManager* snapshot_manager) override; | 66 base::HistogramSnapshotManager* snapshot_manager) override; |
58 | 67 |
68 // base::StatisticsRecorder::MetricsDisplay: | |
69 void WriteTitleString(std::string* output) override; | |
70 void WriteGraphs(const std::string& query, | |
71 bool html, | |
72 std::string* output) override; | |
73 | |
59 // content::NotificationObserver: | 74 // content::NotificationObserver: |
60 void Observe(int type, | 75 void Observe(int type, |
61 const content::NotificationSource& source, | 76 const content::NotificationSource& source, |
62 const content::NotificationDetails& details) override; | 77 const content::NotificationDetails& details) override; |
63 | 78 |
64 // content::RenderProcessHostObserver: | 79 // content::RenderProcessHostObserver: |
65 void RenderProcessReady(content::RenderProcessHost* host) override; | 80 void RenderProcessReady(content::RenderProcessHost* host) override; |
66 void RenderProcessExited(content::RenderProcessHost* host, | 81 void RenderProcessExited(content::RenderProcessHost* host, |
67 base::TerminationStatus status, | 82 base::TerminationStatus status, |
68 int exit_code) override; | 83 int exit_code) override; |
69 void RenderProcessHostDestroyed(content::RenderProcessHost* host) override; | 84 void RenderProcessHostDestroyed(content::RenderProcessHost* host) override; |
70 | 85 |
71 base::ThreadChecker thread_checker_; | 86 // Lock for accessing objects. This is required because MetricsDisplay is |
87 // typically called by a background thread. | |
Ilya Sherman
2016/04/13 00:29:32
Hmm, why so? I would have expected it to be calle
bcwhite
2016/04/13 11:58:18
The previous code broke because it was called on a
| |
88 base::Lock lock_; | |
72 | 89 |
73 // Object for registing notification requests. | 90 // Object for registing notification requests. |
74 content::NotificationRegistrar registrar_; | 91 content::NotificationRegistrar registrar_; |
75 | 92 |
76 // All of the shared-persistent-allocators for known sub-processes. | 93 // All of the shared-persistent-allocators for known sub-processes. |
77 using AllocatorByIdMap = | 94 using AllocatorByIdMap = |
78 IDMap<base::PersistentHistogramAllocator, IDMapOwnPointer, int>; | 95 std::map<int, std::unique_ptr<base::PersistentHistogramAllocator>>; |
79 AllocatorByIdMap allocators_by_id_; | 96 AllocatorByIdMap allocators_by_id_; |
80 | 97 |
81 // Allocators that are no longer attached to a subprocess, to be released | 98 // Allocators that are no longer attached to a subprocess, to be released |
82 // once the last data contained therein has been reported. | 99 // once the last data contained therein has been reported. |
83 std::vector<std::unique_ptr<base::PersistentHistogramAllocator>> | 100 std::vector<std::unique_ptr<base::PersistentHistogramAllocator>> |
84 allocators_to_release_; | 101 allocators_to_release_; |
85 | 102 |
86 // Track all observed render processes to un-observe them on exit. | 103 // Track all observed render processes to un-observe them on exit. |
87 ScopedObserver<content::RenderProcessHost, SubprocessMetricsProvider> | 104 ScopedObserver<content::RenderProcessHost, SubprocessMetricsProvider> |
88 scoped_observer_; | 105 scoped_observer_; |
89 | 106 |
90 // Flag indicating if metrics recording is enabled. Allocators will not | 107 // Flag indicating if metrics recording is enabled. Allocators will not |
91 // live past the death of the subprocess if it is not. | 108 // live past the death of the subprocess if it is not. |
92 bool metrics_recording_enabled_ = false; | 109 bool metrics_recording_enabled_ = false; |
93 | 110 |
94 DISALLOW_COPY_AND_ASSIGN(SubprocessMetricsProvider); | 111 DISALLOW_COPY_AND_ASSIGN(SubprocessMetricsProvider); |
95 }; | 112 }; |
96 | 113 |
97 #endif // CHROME_BROWSER_METRICS_SUBPROCESS_METRICS_PROVIDER_H_ | 114 #endif // CHROME_BROWSER_METRICS_SUBPROCESS_METRICS_PROVIDER_H_ |
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