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. 23 bool 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. 29 bool AdjustLowMemoryMargin(int64_t margin_mb); 30 31 #endif // SANDBOX_LINUX_SUID_PROCESS_UTIL_H_ 32