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