chrome/browser/metrics/chrome_stability_metrics_provider.h

   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
  16 class PrefRegistrySimple;
  17
  18 namespace content {
  19 class RenderProcessHost;
  20 class WebContents;
  21 }
  22
  23 // ChromeStabilityMetricsProvider gathers and logs Chrome-specific stability-
  24 // related metrics.
  25 class ChromeStabilityMetricsProvider
  26     : public metrics::MetricsProvider,
  27       public content::BrowserChildProcessObserver,
  28       public content::NotificationObserver {
  29  public:
  30   ChromeStabilityMetricsProvider();
  31   ~ChromeStabilityMetricsProvider() override;
  32
  33   // metrics::MetricsDataProvider:
  34   void OnRecordingEnabled() override;
  35   void OnRecordingDisabled() override;
  36   void ProvideStabilityMetrics(
  37       metrics::SystemProfileProto* system_profile_proto) override;
  38   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   void Observe(int type,
  46                const content::NotificationSource& source,
  47                const content::NotificationDetails& details) override;
  48
  49   // content::BrowserChildProcessObserver:
  50   void BrowserChildProcessCrashed(
  51       const content::ChildProcessData& data,
  52       int exit_code) override;
  53
  54   // Logs the initiation of a page load and uses |web_contents| to do
  55   // additional logging of the type of page loaded.
  56   void LogLoadStarted(content::WebContents* web_contents);
  57
  58   // Records a renderer process crash.
  59   void LogRendererCrash(content::RenderProcessHost* host,
  60                         base::TerminationStatus status,
  61                         int exit_code);
  62
  63   // Records a renderer process hang.
  64   void LogRendererHang();
  65
  66   // Registrar for receiving stability-related notifications.
  67   content::NotificationRegistrar registrar_;
  68
  69   DISALLOW_COPY_AND_ASSIGN(ChromeStabilityMetricsProvider);
  70 };
  71
  72 #endif  // CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_