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/gtest_prod_util.h"
  10 #include "base/metrics/user_metrics.h"
  11 #include "base/process/kill.h"
  12 #include "components/metrics/metrics_provider.h"
  13 #include "content/public/browser/browser_child_process_observer.h"
  14 #include "content/public/browser/notification_observer.h"
  15 #include "content/public/browser/notification_registrar.h"
  16
  17 class PrefRegistrySimple;
  18
  19 namespace content {
  20 class RenderProcessHost;
  21 class WebContents;
  22 }
  23
  24 class PrefService;
  25
  26 // ChromeStabilityMetricsProvider gathers and logs Chrome-specific stability-
  27 // related metrics.
  28 class ChromeStabilityMetricsProvider
  29     : public metrics::MetricsProvider,
  30       public content::BrowserChildProcessObserver,
  31       public content::NotificationObserver {
  32  public:
  33   explicit ChromeStabilityMetricsProvider(PrefService* local_state);
  34   ~ChromeStabilityMetricsProvider() override;
  35
  36   // metrics::MetricsDataProvider:
  37   void OnRecordingEnabled() override;
  38   void OnRecordingDisabled() override;
  39   void ProvideStabilityMetrics(
  40       metrics::SystemProfileProto* system_profile_proto) override;
  41   void ClearSavedStabilityMetrics() override;
  42
  43   // Registers local state prefs used by this class.
  44   static void RegisterPrefs(PrefRegistrySimple* registry);
  45
  46  private:
  47   FRIEND_TEST_ALL_PREFIXES(ChromeStabilityMetricsProviderTest,
  48                            BrowserChildProcessObserver);
  49   FRIEND_TEST_ALL_PREFIXES(ChromeStabilityMetricsProviderTest,
  50                            NotificationObserver);
  51
  52   // content::NotificationObserver:
  53   void Observe(int type,
  54                const content::NotificationSource& source,
  55                const content::NotificationDetails& details) override;
  56
  57   // content::BrowserChildProcessObserver:
  58   void BrowserChildProcessCrashed(
  59       const content::ChildProcessData& data,
  60       int exit_code) override;
  61
  62   // Logs the initiation of a page load and uses |web_contents| to do
  63   // additional logging of the type of page loaded.
  64   void LogLoadStarted(content::WebContents* web_contents);
  65
  66   // Records a renderer process crash.
  67   void LogRendererCrash(content::RenderProcessHost* host,
  68                         base::TerminationStatus status,
  69                         int exit_code);
  70
  71   // Increment an Integer pref value specified by |path|.
  72   void IncrementPrefValue(const char* path);
  73
  74   // Increment a 64-bit Integer pref value specified by |path|.
  75   void IncrementLongPrefsValue(const char* path);
  76
  77   // Records a renderer process hang.
  78   void LogRendererHang();
  79
  80   PrefService* local_state_;
  81
  82   // Registrar for receiving stability-related notifications.
  83   content::NotificationRegistrar registrar_;
  84
  85   DISALLOW_COPY_AND_ASSIGN(ChromeStabilityMetricsProvider);
  86 };
  87
  88 #endif  // CHROME_BROWSER_METRICS_CHROME_STABILITY_METRICS_PROVIDER_H_