52 lines
1.5 KiB
C++
52 lines
1.5 KiB
C++
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// Copyright 2021 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/process/process.h"
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#include "base/notreached.h"
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#include "base/process/internal_linux.h"
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namespace base {
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// static
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bool Process::CanBackgroundProcesses() {
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return false;
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}
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bool Process::IsProcessBackgrounded() const {
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// See SetProcessBackgrounded().
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DCHECK(IsValid());
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return false;
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}
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bool Process::SetProcessBackgrounded(bool value) {
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// Not implemented for POSIX systems other than Linux and Mac. With POSIX, if
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// we were to lower the process priority we wouldn't be able to raise it back
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// to its initial priority.
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NOTIMPLEMENTED();
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return false;
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}
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Time Process::CreationTime() const {
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// On Android, /proc is mounted (on recent-enough versions) with hidepid=2,
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// which hides other PIDs in /proc. This means that only /proc/self is
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// accessible. Instead of trying (and failing) to read the file, don't attempt
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// to read it. This also provides consistency across releases.
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int64_t start_ticks = is_current()
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? internal::ReadProcSelfStatsAndGetFieldAsInt64(
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internal::VM_STARTTIME)
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: 0;
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if (!start_ticks)
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return Time();
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TimeDelta start_offset = internal::ClockTicksToTimeDelta(start_ticks);
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Time boot_time = internal::GetBootTime();
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if (boot_time.is_null())
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return Time();
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return Time(boot_time + start_offset);
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}
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} // namespace base
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