win: Add support for CPUTimes and StartTime to snapshot

snapshot/win/process_reader_win.h

 // Copyright 2015 The Crashpad Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
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 //     http://www.apache.org/licenses/LICENSE-2.0
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 // See the License for the specific language governing permissions and
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 #ifndef CRASHPAD_SNAPSHOT_WIN_PROCESS_READER_WIN_H_
 #define CRASHPAD_SNAPSHOT_WIN_PROCESS_READER_WIN_H_
 
+#include <sys/time.h>
 #include <windows.h>
 
 #include "util/misc/initialization_state_dcheck.h"
 #include "util/win/address_types.h"
 #include "util/win/process_info.h"
 
 namespace crashpad {
 
 //! \brief Accesses information about another process, identified by a HANDLE.
 class ProcessReaderWin {
@@ skipping 13 matching lines @@
   bool Initialize(HANDLE process);
 
   //! \return `true` if the target task is a 64-bit process.
   bool Is64Bit() const { return process_info_.Is64Bit(); }
 
   pid_t ProcessID() const { return process_info_.ProcessID(); }
   pid_t ParentProcessID() const { return process_info_.ParentProcessID(); }
 
   bool ReadMemory(WinVMAddress at, WinVMSize num_bytes, void* into);
 
+  //! \brief Determines the target process' start time.
+  //!
+  //! \param[out] start_time The time that the process started.
+  //! 
+  //! \return `true` on success, `false` on failure, with a warning logged. On
+  //!     failure, \a start_time will be set to represent the epoch.

[Mark Mentovai, 2015/05/04 21:29:23]

It’s OK to leave start_time undefined as far as the docs go on failure, even if
the implementation does in fact zero it. (But it doesn’t have to either.) Same
in CPUTimes().

[scottmg, 2015/05/05 16:45:48]

Done.

+  bool StartTime(timeval* start_time) const;
+
+  //! \brief Determines the target process' execution time.
+  //!
+  //! \param[out] user_time The amount of time the process has executed code in
+  //!     user mode.
+  //! \param[out] system_time The amount of time the process has executed code
+  //!     in kernel mode.
+  //!
+  //! \return `true` on success, `false` on failure, with a warning logged. On
+  //!     failure, \a user_time and \a system_time will be set to represent no
+  //!     time spent executing code in user or kernel mode.
+  bool CPUTimes(timeval* user_time, timeval* system_time) const;
+
   //! \return The modules loaded in the process. The first element (at index
   //!     `0`) corresponds to the main executable.
   const std::vector<ProcessInfo::Module>& Modules();
 
  private:
   HANDLE process_;
   ProcessInfo process_info_;
   std::vector<ProcessInfo::Module> modules_;
   InitializationStateDcheck initialized_;
 
   DISALLOW_COPY_AND_ASSIGN(ProcessReaderWin);
 };
 
 }  // namespace crashpad
 
 #endif  // CRASHPAD_SNAPSHOT_WIN_PROCESS_READER_WIN_H_