| // Copyright (c) 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_BROWSER_WATCHER_EXIT_FUNNEL_WIN_H_ |
| #define COMPONENTS_BROWSER_WATCHER_EXIT_FUNNEL_WIN_H_ |
| |
| #include "base/macros.h" |
| #include "base/process/process_handle.h" |
| #include "base/strings/string16.h" |
| #include "base/time/time.h" |
| #include "base/win/registry.h" |
| |
| namespace browser_watcher { |
| |
| // A wrapper class that takes care of persistently recording a trace of named, |
| // timed events in registry, associated with a process instance. This allows |
| // reconstructing and reporting an event trace on a subsequent launch. |
| // The event trace is stored in registry under a new key named |
| // <pid>-<uniquifier>, where each event is a value named after the event, with |
| // an associated QWORD value noting the event time. |
| class ExitFunnel { |
| public: |
| ExitFunnel(); |
| ~ExitFunnel(); |
| |
| // Initializes the exit funnel with |registry_path| and |process|. |
| // |process| must be open for PROCESS_QUERY_INFORMATION at least. |
| // Returns false on failure to create or open the registry path corresponding |
| // to |process|. |
| bool Init(const base::char16* registry_path, base::ProcessHandle process); |
| |
| // Initializes the exit funnel with |registry_path|, |pid| and |
| // |creation_time|. |
| // Returns false on failure to create or open the registry path corresponding |
| // to |process|. |
| // Exposed for testing. |
| bool InitImpl(const base::char16* registry_path, |
| base::ProcessId pid, |
| base::Time creation_time); |
| |
| // Records |event_name| at the current time in the registry for the process |
| // this instance is associated with. Returns false on failure to record the |
| // event. |
| bool RecordEvent(const base::char16* event_name); |
| |
| // Records |event_name| at the current time in the registry at |registry_path| |
| // for this process. |
| static bool RecordSingleEvent(const base::char16* registry_path, |
| const base::char16* event_name); |
| |
| private: |
| base::win::RegKey key_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ExitFunnel); |
| }; |
| |
| } // namespace browser_watcher |
| |
| #endif // COMPONENTS_BROWSER_WATCHER_EXIT_FUNNEL_WIN_H_ |