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| 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_EXIT_FUNNEL_WIN_H_ |
| 6 #define COMPONENTS_BROWSER_WATCHER_EXIT_FUNNEL_WIN_H_ |
| 7 |
| 8 #include "base/macros.h" |
| 9 #include "base/process/process_handle.h" |
| 10 #include "base/strings/string16.h" |
| 11 #include "base/win/registry.h" |
| 12 |
| 13 namespace browser_watcher { |
| 14 |
| 15 // A wrapper class that takes care of persistently recording a trace of named, |
| 16 // timed events in registry, associated with a process instance. This allows |
| 17 // reconstructing and reporting an event trace on a subsequent launch. |
| 18 // The event trace is stored in registry under a new key named |
| 19 // <pid>-<uniquifier>, where each event is a value named after the event, with |
| 20 // an associated QWORD value noting the event time. |
| 21 class ExitFunnel { |
| 22 public: |
| 23 ExitFunnel(); |
| 24 ~ExitFunnel(); |
| 25 |
| 26 // Initializes the exit funnel with |registry_path| and |process|. |
| 27 // |process| must be open for PROCESS_QUERY_INFORMATION at least. |
| 28 // Returns false on failure to create or open the registry path corresponding |
| 29 // to |process|. |
| 30 bool Init(const base::char16* registry_path, base::ProcessHandle process); |
| 31 |
| 32 // Records |event_name| at the current time in the registry for the process |
| 33 // this instance is associated with. Returns false on failure to record the |
| 34 // event. |
| 35 bool RecordEvent(const base::char16* event_name); |
| 36 |
| 37 // Records |event_name| at the current time in the registry at |registry_path| |
| 38 // for this process. |
| 39 static bool RecordSingleEvent(const base::char16* registry_path, |
| 40 const base::char16* event_name); |
| 41 |
| 42 private: |
| 43 base::win::RegKey key_; |
| 44 |
| 45 DISALLOW_COPY_AND_ASSIGN(ExitFunnel); |
| 46 }; |
| 47 |
| 48 } // namespace browser_watcher |
| 49 |
| 50 #endif // COMPONENTS_BROWSER_WATCHER_EXIT_FUNNEL_WIN_H_ |
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