base/process/process_info_linux.cc

   1 // Copyright 2013 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 #include "base/process/process_info.h"
   6
   7 #include "base/basictypes.h"
   8 #include "base/logging.h"
   9 #include "base/process/internal_linux.h"
  10 #include "base/process/process_handle.h"
  11 #include "base/time/time.h"
  12
  13 namespace base {
  14
  15 // static
  16 const Time CurrentProcessInfo::CreationTime() {
  17   ProcessHandle pid = GetCurrentProcessHandle();
  18   int64 start_ticks =
  19       internal::ReadProcStatsAndGetFieldAsInt64(pid, internal::VM_STARTTIME);
  20   DCHECK(start_ticks);
  21   TimeDelta start_offset = internal::ClockTicksToTimeDelta(start_ticks);
  22   Time boot_time = internal::GetBootTime();
  23   DCHECK(!boot_time.is_null());
  24   return Time(boot_time + start_offset);
  25 }
  26
  27 }  // namespace base