1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_
6#define CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_
7
8#include "base/basictypes.h"
9#include "base/metrics/user_metrics.h"
10#include "base/process/kill.h"
11#include "components/metrics/metrics_provider.h"
12#include "content/public/browser/browser_child_process_observer.h"
13#include "content/public/browser/notification_observer.h"
14#include "content/public/browser/notification_registrar.h"
15
16class PrefRegistrySimple;
17
18namespace content {
19class RenderProcessHost;
20class WebContents;
21}
22
23// ChromeStabilityMetricsProvider gathers and logs Chrome-specific stability-
24// related metrics.
25class ChromeStabilityMetricsProvider
26    : public metrics::MetricsProvider,
27      public content::BrowserChildProcessObserver,
28      public content::NotificationObserver {
29 public:
30  ChromeStabilityMetricsProvider();
31  virtual ~ChromeStabilityMetricsProvider();
32
33  // metrics::MetricsDataProvider:
34  virtual void OnRecordingEnabled() OVERRIDE;
35  virtual void OnRecordingDisabled() OVERRIDE;
36  virtual void ProvideStabilityMetrics(
37      metrics::SystemProfileProto* system_profile_proto) OVERRIDE;
38  virtual void ClearSavedStabilityMetrics() OVERRIDE;
39
40  // Registers local state prefs used by this class.
41  static void RegisterPrefs(PrefRegistrySimple* registry);
42
43 private:
44  // content::NotificationObserver:
45  virtual void Observe(int type,
46                       const content::NotificationSource& source,
47                       const content::NotificationDetails& details) OVERRIDE;
48
49  // content::BrowserChildProcessObserver:
50  virtual void BrowserChildProcessCrashed(
51      const content::ChildProcessData& data) OVERRIDE;
52
53  // Logs the initiation of a page load and uses |web_contents| to do
54  // additional logging of the type of page loaded.
55  void LogLoadStarted(content::WebContents* web_contents);
56
57  // Records a renderer process crash.
58  void LogRendererCrash(content::RenderProcessHost* host,
59                        base::TerminationStatus status,
60                        int exit_code);
61
62  // Records a renderer process hang.
63  void LogRendererHang();
64
65  // Registrar for receiving stability-related notifications.
66  content::NotificationRegistrar registrar_;
67
68  DISALLOW_COPY_AND_ASSIGN(ChromeStabilityMetricsProvider);
69};
70
71#endif  // CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_
72