components/browser_watcher/watcher_metrics_provider_win.h

   1 // Copyright (c) 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 COMPONENTS_BROWSER_WATCHER_WATCHER_METRICS_PROVIDER_WIN_H_
   6 #define COMPONENTS_BROWSER_WATCHER_WATCHER_METRICS_PROVIDER_WIN_H_
   7
   8 #include "base/macros.h"
   9 #include "base/strings/string16.h"
  10 #include "components/metrics/metrics_provider.h"
  11
  12 namespace browser_watcher {
  13
  14 // Provides stability data captured by the Chrome Watcher, namely the browser
  15 // process exit codes, as well as exit funnel metrics.
  16 // The exit funnel records a trace of named, timed events in registry per
  17 // process. For reporting, the trace is recorded as a sequence of events
  18 // named Stability.ExitFunnel.<eventname>, associated to the time
  19 // (in milliseconds) from first event in a trace. For a normal process exit,
  20 // the sequence might look like this:
  21 // - Stability.ExitFunnel.Logoff: 0
  22 // - Stability.ExitFunnel.NotifyShutdown: 10
  23 // - Stability.ExitFunnel.EndSession: 20
  24 // - Stability.ExitFunnel.KillProcess: 30
  25 class WatcherMetricsProviderWin : public metrics::MetricsProvider {
  26  public:
  27   static const char kBrowserExitCodeHistogramName[];
  28   static const char kExitFunnelHistogramPrefix[];
  29
  30   // Initializes the reporter. If |report_exit_funnels| is false, the provider
  31   // will clear the registry data, but not report it.
  32   WatcherMetricsProviderWin(const base::char16* registry_path,
  33                             bool report_exit_funnels);
  34   ~WatcherMetricsProviderWin() override;
  35
  36   // metrics::MetricsProvider implementation.
  37   void ProvideStabilityMetrics(
  38       metrics::SystemProfileProto* system_profile_proto) override;
  39
  40  private:
  41   base::string16 registry_path_;
  42   bool report_exit_funnels_;
  43
  44   DISALLOW_COPY_AND_ASSIGN(WatcherMetricsProviderWin);
  45 };
  46
  47 }  // namespace browser_watcher
  48
  49 #endif  // COMPONENTS_BROWSER_WATCHER_WATCHER_METRICS_PROVIDER_WIN_H_