1// Copyright (c) 2012 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// The following is duplicated from base/process_utils.h.
6// We shouldn't link against C++ code in a setuid binary.
7
8#ifndef SANDBOX_LINUX_SUID_PROCESS_UTIL_H_
9#define SANDBOX_LINUX_SUID_PROCESS_UTIL_H_
10
11#include <stdbool.h>
12#include <stdint.h>
13#include <sys/types.h>
14
15// This adjusts /proc/process/oom_score_adj so the Linux OOM killer
16// will prefer certain process types over others. The range for the
17// adjustment is [-1000, 1000], with [0, 1000] being user accessible.
18//
19// If the Linux system isn't new enough to use oom_score_adj, then we
20// try to set the older oom_adj value instead, scaling the score to
21// the required range of [0, 15]. This may result in some aliasing of
22// values, of course.
23bool AdjustOOMScore(pid_t process, int score);
24
25// This adjusts /sys/kernel/mm/chromeos-low_mem/margin so that
26// the kernel notifies us that we are low on memory when less than
27// |margin_mb| megabytes are available.  Setting |margin_mb| to -1
28// turns off low memory notification.
29bool AdjustLowMemoryMargin(int64_t margin_mb);
30
31#endif  // SANDBOX_LINUX_SUID_PROCESS_UTIL_H_
32