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 <sys/types.h> 13 14 // This adjusts /proc/process/oom_score_adj so the Linux OOM killer 15 // will prefer certain process types over others. The range for the 16 // adjustment is [-1000, 1000], with [0, 1000] being user accessible. 17 // 18 // If the Linux system isn't new enough to use oom_score_adj, then we 19 // try to set the older oom_adj value instead, scaling the score to 20 // the required range of [0, 15]. This may result in some aliasing of 21 // values, of course. 22 bool AdjustOOMScore(pid_t process, int score); 23 24 // This adjusts /sys/kernel/mm/chromeos-low_mem/margin so that 25 // the kernel notifies us that we are low on memory when less than 26 // |margin_mb| megabytes are available. Setting |margin_mb| to -1 27 // turns off low memory notification. 28 bool AdjustLowMemoryMargin(int64_t margin_mb); 29 30 #endif // SANDBOX_LINUX_SUID_PROCESS_UTIL_H_ 31