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gems-kernel/source/THIRDPARTY/xnu/bsd/sys/kern_memorystatus.h
Sam Sneed f5727805f2 add darwin/xnu functionality
2024-06-03 11:29:39 -05:00

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/*
* Copyright (c) 2006-2018 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
#ifndef SYS_MEMORYSTATUS_H
#define SYS_MEMORYSTATUS_H
#include <sys/time.h>
#include <mach_debug/zone_info.h>
#include <sys/proc.h>
#include <sys/reason.h>
#include <stdbool.h>
#define MEMORYSTATUS_ENTITLEMENT "com.apple.private.memorystatus"
#define JETSAM_PRIORITY_REVISION 2
#define JETSAM_PRIORITY_IDLE_HEAD -2
/* The value -1 is an alias to JETSAM_PRIORITY_DEFAULT */
#define JETSAM_PRIORITY_IDLE 0
#define JETSAM_PRIORITY_ENTITLED_MAX 9 /* Entitled processes may use bands 1-9 for experimentation */
#define JETSAM_PRIORITY_IDLE_DEFERRED 10 /* Keeping this around till all xnu_quick_tests can be moved away from it.*/
#define JETSAM_PRIORITY_AGING_BAND1 JETSAM_PRIORITY_IDLE_DEFERRED
#define JETSAM_PRIORITY_BACKGROUND_OPPORTUNISTIC 20
#define JETSAM_PRIORITY_AGING_BAND2 JETSAM_PRIORITY_BACKGROUND_OPPORTUNISTIC
#define JETSAM_PRIORITY_BACKGROUND 30
/*
* NB: This band is no longer used by mail, but IS used by many active
* processes doing background work.
*/
#define JETSAM_PRIORITY_MAIL 40
#define JETSAM_PRIORITY_ELEVATED_INACTIVE JETSAM_PRIORITY_MAIL
#define JETSAM_PRIORITY_PHONE 50
#define JETSAM_PRIORITY_FREEZER 75
#define JETSAM_PRIORITY_UI_SUPPORT 80
#define JETSAM_PRIORITY_FOREGROUND_SUPPORT 90
#define JETSAM_PRIORITY_FOREGROUND 100
#define JETSAM_PRIORITY_AUDIO_AND_ACCESSORY 120
#define JETSAM_PRIORITY_CONDUCTOR 130
#define JETSAM_PRIORITY_DRIVER_APPLE 150
#define JETSAM_PRIORITY_HOME 160
#define JETSAM_PRIORITY_EXECUTIVE 170
#define JETSAM_PRIORITY_IMPORTANT 180
#define JETSAM_PRIORITY_CRITICAL 190
#define JETSAM_PRIORITY_MAX 210
/*
* Used to show that a process is so high priority it is not processed by jetsam at all.
* This is set on launchd and kernel_task.
*/
#define JETSAM_PRIORITY_INTERNAL 999
/* TODO - tune. This should probably be lower priority */
#define JETSAM_PRIORITY_DEFAULT 180
#define JETSAM_PRIORITY_TELEPHONY 190
/* Compatibility */
#define DEFAULT_JETSAM_PRIORITY 180
/*
* The deferral time used by default for apps and daemons in all aging
* policies except kJetsamAgingPolicySysProcsReclaimedFirst is
* DEFERRED_IDLE_EXIT_TIME_SECS.
*
* For kJetsamAgingPolicySysProcsReclaimedFirst,
*
* Daemons: The actual idle deferred time for the daemon is based on
* the relaunch behavior of the daemon. The relaunch behavior determines
* the scaling factor applied to DEFERRED_IDLE_EXIT_TIME_SECS. See
* kJetsamSysProcsIdleDelayTime* ratios defined in kern_memorystatus.c
*
* Apps: The apps are aged for DEFERRED_IDLE_EXIT_TIME_SECS factored
* by kJetsamAppsIdleDelayTimeRatio.
*/
#define DEFERRED_IDLE_EXIT_TIME_SECS 10
#define KEV_MEMORYSTATUS_SUBCLASS 3
enum {
kMemorystatusLevelNote = 1,
kMemorystatusSnapshotNote = 2,
kMemorystatusFreezeNote = 3,
kMemorystatusPressureNote = 4
};
enum {
kMemorystatusLevelAny = -1,
kMemorystatusLevelNormal = 0,
kMemorystatusLevelWarning = 1,
kMemorystatusLevelUrgent = 2,
kMemorystatusLevelCritical = 3
};
typedef struct memorystatus_priority_entry {
pid_t pid;
int32_t priority;
uint64_t user_data;
int32_t limit; /* MB */
uint32_t state;
} memorystatus_priority_entry_t;
/*
* This should be the structure to specify different properties
* for processes (group or single) from user-space. Unfortunately,
* we can't move to it completely because the priority_entry structure
* above has been in use for a while now. We'll have to deprecate it.
*
* To support new fields/properties, we will add a new structure with a
* new version and a new size.
*/
#define MEMORYSTATUS_MPE_VERSION_1 1
#define MEMORYSTATUS_MPE_VERSION_1_SIZE sizeof(struct memorystatus_properties_entry_v1)
typedef struct memorystatus_properties_entry_v1 {
int version;
pid_t pid;
int32_t priority;
int use_probability;
uint64_t user_data;
int32_t limit; /* MB */
uint32_t state;
char proc_name[MAXCOMLEN + 1];
char __pad1[3];
} memorystatus_properties_entry_v1_t;
/*
* Represents a freeze or demotion candidate.
*/
typedef struct memorystatus_properties_freeze_entry_v1 {
int version;
pid_t pid;
uint32_t priority;
char proc_name[(2 * MAXCOMLEN) + 1];
char __pad1[3];
} memorystatus_properties_freeze_entry_v1;
typedef struct memorystatus_kernel_stats {
uint32_t free_pages;
uint32_t active_pages;
uint32_t inactive_pages;
uint32_t throttled_pages;
uint32_t purgeable_pages;
uint32_t wired_pages;
uint32_t speculative_pages;
uint32_t filebacked_pages;
uint32_t anonymous_pages;
uint32_t compressor_pages;
uint64_t compressions;
uint64_t decompressions;
uint64_t total_uncompressed_pages_in_compressor;
uint64_t zone_map_size;
uint64_t zone_map_capacity;
uint64_t largest_zone_size;
char largest_zone_name[MACH_ZONE_NAME_MAX_LEN];
} memorystatus_kernel_stats_t;
typedef enum memorystatus_freeze_skip_reason {
kMemorystatusFreezeSkipReasonNone = 0,
kMemorystatusFreezeSkipReasonExcessSharedMemory = 1,
kMemorystatusFreezeSkipReasonLowPrivateSharedRatio = 2,
kMemorystatusFreezeSkipReasonNoCompressorSpace = 3,
kMemorystatusFreezeSkipReasonNoSwapSpace = 4,
kMemorystatusFreezeSkipReasonBelowMinPages = 5,
kMemorystatusFreezeSkipReasonLowProbOfUse = 6,
kMemorystatusFreezeSkipReasonOther = 7,
kMemorystatusFreezeSkipReasonOutOfBudget = 8,
kMemorystatusFreezeSkipReasonOutOfSlots = 9,
kMemorystatusFreezeSkipReasonDisabled = 10,
kMemorystatusFreezeSkipReasonElevated = 11,
_kMemorystatusFreezeSkipReasonMax
} memorystatus_freeze_skip_reason_t;
/*
** This is a variable-length struct.
** Allocate a buffer of the size returned by the sysctl, cast to a memorystatus_snapshot_t *
*/
typedef struct jetsam_snapshot_entry {
pid_t pid;
char name[(2 * MAXCOMLEN) + 1];
int32_t priority;
uint32_t state;
uint32_t fds;
memorystatus_freeze_skip_reason_t jse_freeze_skip_reason; /* why wasn't this process frozen? */
uint8_t uuid[16];
uint64_t user_data;
uint64_t killed;
uint64_t pages;
uint64_t max_pages_lifetime;
uint64_t purgeable_pages;
uint64_t jse_internal_pages;
uint64_t jse_internal_compressed_pages;
uint64_t jse_purgeable_nonvolatile_pages;
uint64_t jse_purgeable_nonvolatile_compressed_pages;
uint64_t jse_alternate_accounting_pages;
uint64_t jse_alternate_accounting_compressed_pages;
uint64_t jse_iokit_mapped_pages;
uint64_t jse_page_table_pages;
uint64_t jse_memory_region_count;
uint64_t jse_gencount; /* memorystatus_thread generation counter */
uint64_t jse_starttime; /* absolute time when process starts */
uint64_t jse_killtime; /* absolute time when jetsam chooses to kill a process */
uint64_t jse_idle_delta; /* time spent in idle band */
uint64_t jse_coalition_jetsam_id; /* we only expose coalition id for COALITION_TYPE_JETSAM */
struct timeval64 cpu_time;
uint64_t jse_thaw_count;
uint64_t jse_frozen_to_swap_pages;
uint64_t csflags;
uint32_t cs_trust_level;
} memorystatus_jetsam_snapshot_entry_t;
typedef struct jetsam_snapshot {
uint64_t snapshot_time; /* absolute time snapshot was initialized */
uint64_t notification_time; /* absolute time snapshot was consumed */
uint64_t js_gencount; /* memorystatus_thread generation counter */
memorystatus_kernel_stats_t stats; /* system stat when snapshot is initialized */
size_t entry_count;
memorystatus_jetsam_snapshot_entry_t entries[];
} memorystatus_jetsam_snapshot_t;
/* TODO - deprecate; see <rdar://problem/12969599> */
#define kMaxSnapshotEntries 192
/*
* default jetsam snapshot support
*/
extern memorystatus_jetsam_snapshot_t *memorystatus_jetsam_snapshot;
extern memorystatus_jetsam_snapshot_t *memorystatus_jetsam_snapshot_copy;
#if CONFIG_FREEZE
extern memorystatus_jetsam_snapshot_t *memorystatus_jetsam_snapshot_freezer;
extern unsigned int memorystatus_jetsam_snapshot_freezer_max;
extern unsigned int memorystatus_jetsam_snapshot_freezer_size;
#endif /* CONFIG_FREEZE */
extern unsigned int memorystatus_jetsam_snapshot_count;
extern unsigned int memorystatus_jetsam_snapshot_copy_count;
extern unsigned int memorystatus_jetsam_snapshot_max;
extern unsigned int memorystatus_jetsam_snapshot_size;
extern uint64_t memorystatus_jetsam_snapshot_last_timestamp;
extern uint64_t memorystatus_jetsam_snapshot_timeout;
#define memorystatus_jetsam_snapshot_list memorystatus_jetsam_snapshot->entries
#define JETSAM_SNAPSHOT_TIMEOUT_SECS 30
/* General memorystatus stuff */
extern uint64_t memorystatus_sysprocs_idle_delay_time;
extern uint64_t memorystatus_apps_idle_delay_time;
/* State */
#define kMemorystatusSuspended 0x01
#define kMemorystatusFrozen 0x02
#define kMemorystatusWasThawed 0x04
#define kMemorystatusTracked 0x08
#define kMemorystatusSupportsIdleExit 0x10
#define kMemorystatusDirty 0x20
#define kMemorystatusAssertion 0x40
/*
* Jetsam exit reason definitions - related to memorystatus
*
* When adding new exit reasons also update:
* JETSAM_REASON_MEMORYSTATUS_MAX
* kMemorystatusKilled... Cause enum
* memorystatus_kill_cause_name[]
*/
#define JETSAM_REASON_INVALID 0
#define JETSAM_REASON_GENERIC 1
#define JETSAM_REASON_MEMORY_HIGHWATER 2
#define JETSAM_REASON_VNODE 3
#define JETSAM_REASON_MEMORY_VMPAGESHORTAGE 4
#define JETSAM_REASON_MEMORY_PROCTHRASHING 5
#define JETSAM_REASON_MEMORY_FCTHRASHING 6
#define JETSAM_REASON_MEMORY_PERPROCESSLIMIT 7
#define JETSAM_REASON_MEMORY_DISK_SPACE_SHORTAGE 8
#define JETSAM_REASON_MEMORY_IDLE_EXIT 9
#define JETSAM_REASON_ZONE_MAP_EXHAUSTION 10
#define JETSAM_REASON_MEMORY_VMCOMPRESSOR_THRASHING 11
#define JETSAM_REASON_MEMORY_VMCOMPRESSOR_SPACE_SHORTAGE 12
#define JETSAM_REASON_LOWSWAP 13
#define JETSAM_REASON_MEMORY_SUSTAINED_PRESSURE 14
#define JETSAM_REASON_MEMORY_VMPAGEOUT_STARVATION 15
#define JETSAM_REASON_MEMORYSTATUS_MAX JETSAM_REASON_MEMORY_VMPAGEOUT_STARVATION
/* non-memorystatus jetsam reasons */
#define JETSAM_REASON_CPULIMIT 100
typedef uint64_t jetsam_reason_t;
/* memorystatus kill cause */
typedef enum {
kMemorystatusInvalid = JETSAM_REASON_INVALID,
kMemorystatusKilled = JETSAM_REASON_GENERIC,
kMemorystatusKilledHiwat = JETSAM_REASON_MEMORY_HIGHWATER,
kMemorystatusKilledVnodes = JETSAM_REASON_VNODE,
kMemorystatusKilledVMPageShortage = JETSAM_REASON_MEMORY_VMPAGESHORTAGE,
kMemorystatusKilledProcThrashing = JETSAM_REASON_MEMORY_PROCTHRASHING,
kMemorystatusKilledFCThrashing = JETSAM_REASON_MEMORY_FCTHRASHING,
kMemorystatusKilledPerProcessLimit = JETSAM_REASON_MEMORY_PERPROCESSLIMIT,
kMemorystatusKilledDiskSpaceShortage = JETSAM_REASON_MEMORY_DISK_SPACE_SHORTAGE,
kMemorystatusKilledIdleExit = JETSAM_REASON_MEMORY_IDLE_EXIT,
kMemorystatusKilledZoneMapExhaustion = JETSAM_REASON_ZONE_MAP_EXHAUSTION,
kMemorystatusKilledVMCompressorThrashing = JETSAM_REASON_MEMORY_VMCOMPRESSOR_THRASHING,
kMemorystatusKilledVMCompressorSpaceShortage = JETSAM_REASON_MEMORY_VMCOMPRESSOR_SPACE_SHORTAGE,
kMemorystatusKilledLowSwap = JETSAM_REASON_LOWSWAP,
kMemorystatusKilledSustainedPressure = JETSAM_REASON_MEMORY_SUSTAINED_PRESSURE,
kMemorystatusKilledVMPageoutStarvation = JETSAM_REASON_MEMORY_VMPAGEOUT_STARVATION,
} memorystatus_kill_cause_t;
/*
* For backwards compatibility
* Keeping these around for external users (e.g. ReportCrash, Ariadne).
* TODO: Remove once they stop using these.
*/
#define kMemorystatusKilledDiagnostic kMemorystatusKilledDiskSpaceShortage
#define kMemorystatusKilledVMThrashing kMemorystatusKilledVMCompressorThrashing
#define JETSAM_REASON_MEMORY_VMTHRASHING JETSAM_REASON_MEMORY_VMCOMPRESSOR_THRASHING
/* Memorystatus control */
#define MEMORYSTATUS_BUFFERSIZE_MAX 65536
#ifndef KERNEL
__BEGIN_DECLS
int memorystatus_get_level(user_addr_t level);
int memorystatus_control(uint32_t command, int32_t pid, uint32_t flags, void *buffer, size_t buffersize);
__END_DECLS
#endif
/* Commands */
#define MEMORYSTATUS_CMD_GET_PRIORITY_LIST 1
#define MEMORYSTATUS_CMD_SET_PRIORITY_PROPERTIES 2
#define MEMORYSTATUS_CMD_GET_JETSAM_SNAPSHOT 3
#define MEMORYSTATUS_CMD_GET_PRESSURE_STATUS 4
#define MEMORYSTATUS_CMD_SET_JETSAM_HIGH_WATER_MARK 5 /* Set active memory limit = inactive memory limit, both non-fatal */
#define MEMORYSTATUS_CMD_SET_JETSAM_TASK_LIMIT 6 /* Set active memory limit = inactive memory limit, both fatal */
#define MEMORYSTATUS_CMD_SET_MEMLIMIT_PROPERTIES 7 /* Set memory limits plus attributes independently */
#define MEMORYSTATUS_CMD_GET_MEMLIMIT_PROPERTIES 8 /* Get memory limits plus attributes */
#define MEMORYSTATUS_CMD_PRIVILEGED_LISTENER_ENABLE 9 /* Set the task's status as a privileged listener w.r.t memory notifications */
#define MEMORYSTATUS_CMD_PRIVILEGED_LISTENER_DISABLE 10 /* Reset the task's status as a privileged listener w.r.t memory notifications */
#define MEMORYSTATUS_CMD_AGGRESSIVE_JETSAM_LENIENT_MODE_ENABLE 11 /* Enable the 'lenient' mode for aggressive jetsam. See comments in kern_memorystatus.c near the top. */
#define MEMORYSTATUS_CMD_AGGRESSIVE_JETSAM_LENIENT_MODE_DISABLE 12 /* Disable the 'lenient' mode for aggressive jetsam. */
#define MEMORYSTATUS_CMD_GET_MEMLIMIT_EXCESS 13 /* Compute how much a process's phys_footprint exceeds inactive memory limit */
#define MEMORYSTATUS_CMD_ELEVATED_INACTIVEJETSAMPRIORITY_ENABLE 14 /* Set the inactive jetsam band for a process to JETSAM_PRIORITY_ELEVATED_INACTIVE */
#define MEMORYSTATUS_CMD_ELEVATED_INACTIVEJETSAMPRIORITY_DISABLE 15 /* Reset the inactive jetsam band for a process to the default band (0)*/
#define MEMORYSTATUS_CMD_SET_PROCESS_IS_MANAGED 16 /* (Re-)Set state on a process that marks it as (un-)managed by a system entity e.g. assertiond */
#define MEMORYSTATUS_CMD_GET_PROCESS_IS_MANAGED 17 /* Return the 'managed' status of a process */
#define MEMORYSTATUS_CMD_SET_PROCESS_IS_FREEZABLE 18 /* Is the process eligible for freezing? Apps and extensions can pass in FALSE to opt out of freezing, i.e.,
* if they would prefer being jetsam'ed in the idle band to being frozen in an elevated band. */
#define MEMORYSTATUS_CMD_GET_PROCESS_IS_FREEZABLE 19 /* Return the freezable state of a process. */
#define MEMORYSTATUS_CMD_FREEZER_CONTROL 20
#define MEMORYSTATUS_CMD_GET_AGGRESSIVE_JETSAM_LENIENT_MODE 21 /* Query if the lenient mode for aggressive jetsam is enabled. */
#define MEMORYSTATUS_CMD_INCREASE_JETSAM_TASK_LIMIT 22 /* Used by DYLD to increase the jetsam active and inactive limits, when using roots */
#if PRIVATE
#define MEMORYSTATUS_CMD_SET_TESTING_PID 23 /* Used by unit tests in the development kernel only. */
#endif /* PRIVATE */
#define MEMORYSTATUS_CMD_GET_PROCESS_IS_FROZEN 24 /* Check if the process is frozen. */
#define MEMORYSTATUS_CMD_MARK_PROCESS_COALITION_SWAPPABLE 25 /* Set the coalition led by this process as swappable. This is a one-way transition. Swappable coalitions can never be made non-swappable. */
#define MEMORYSTATUS_CMD_GET_PROCESS_COALITION_IS_SWAPPABLE 26 /* Get the swappable status for this process' coalition. */
#define MEMORYSTATUS_CMD_CONVERT_MEMLIMIT_MB 28 /* Given a memlimit value (which may be 0 or -1), convert it to an actual limit in megabytes. */
#define MEMORYSTATUS_CMD_SET_DIAG_LIMIT 30 /* Set the diagnostics memory limit */
#define MEMORYSTATUS_CMD_GET_DIAG_LIMIT 31 /* Get the diagnostics memory limit */
/* Commands that act on a group of processes */
#define MEMORYSTATUS_CMD_GRP_SET_PROPERTIES 100
#if PRIVATE
/* Test commands */
/* Trigger forced jetsam */
#define MEMORYSTATUS_CMD_TEST_JETSAM 1000
#define MEMORYSTATUS_CMD_TEST_JETSAM_SORT 1001
/* Select priority band sort order */
#define JETSAM_SORT_NOSORT 0
#define JETSAM_SORT_DEFAULT 1
#endif /* PRIVATE */
/* memorystatus_control() flags */
#define MEMORYSTATUS_FLAGS_SNAPSHOT_ON_DEMAND 0x1 /* A populated snapshot buffer is returned on demand */
#define MEMORYSTATUS_FLAGS_SNAPSHOT_AT_BOOT 0x2 /* Returns a snapshot with memstats collected at boot */
#define MEMORYSTATUS_FLAGS_SNAPSHOT_COPY 0x4 /* No longer supported. Used to return the previously populated snapshot created by the system */
#define MEMORYSTATUS_FLAGS_GRP_SET_PRIORITY 0x8 /* Set jetsam priorities for a group of pids */
#define MEMORYSTATUS_FLAGS_GRP_SET_PROBABILITY 0x10 /* Set probability of use for a group of processes */
#if PRIVATE
#define MEMORYSTATUS_FLAGS_SET_TESTING_PID 0x20 /* Only used by xnu unit tests. */
#define MEMORYSTATUS_FLAGS_UNSET_TESTING_PID 0x40 /* Only used by xnu unit tests. */
#endif /* PRIVATE */
#define MEMORYSTATUS_FLAGS_SNAPSHOT_FREEZER 0x80 /* A snapshot buffer containing app kills since last consumption */
#define MEMORYSTATUS_FLAGS_GRP_SET_FREEZE_PRIORITY 0x100 /* Set a new ordered list of freeze candidates */
#define MEMORYSTATUS_FLAGS_GRP_SET_DEMOTE_PRIORITY 0x200 /* Set a new ordered list of demote candidates */
/*
* For use with memorystatus_control:
* MEMORYSTATUS_CMD_GET_JETSAM_SNAPSHOT
*
* A jetsam snapshot is initialized when a non-idle
* jetsam event occurs. The data is held in the
* buffer until it is reaped. This is the default
* behavior.
*
* Flags change the default behavior:
* Demand mode - this is an on_demand snapshot,
* meaning data is populated upon request.
*
* Boot mode - this is a snapshot of
* memstats collected before loading the
* init program. Once collected, these
* stats do not change. In this mode,
* the snapshot entry_count is always 0.
*
* Copy mode - this returns the previous snapshot
* collected by the system. The current snaphshot
* might be only half populated.
*
* Snapshots are inherently racey between request
* for buffer size and actual data compilation.
*/
/* These definitions are required for backwards compatibility */
#define MEMORYSTATUS_SNAPSHOT_ON_DEMAND MEMORYSTATUS_FLAGS_SNAPSHOT_ON_DEMAND
#define MEMORYSTATUS_SNAPSHOT_AT_BOOT MEMORYSTATUS_FLAGS_SNAPSHOT_AT_BOOT
#define MEMORYSTATUS_SNAPSHOT_COPY MEMORYSTATUS_FLAGS_SNAPSHOT_COPY
/*
* For use with memorystatus_control:
* MEMORYSTATUS_CMD_SET_PRIORITY_PROPERTIES
*/
typedef struct memorystatus_priority_properties {
int32_t priority;
uint64_t user_data;
} memorystatus_priority_properties_t;
/*
* Inform the kernel that setting the priority property is driven by assertions.
*/
#define MEMORYSTATUS_SET_PRIORITY_ASSERTION 0x1
/*
* For use with memorystatus_control:
* MEMORYSTATUS_CMD_SET_MEMLIMIT_PROPERTIES
* MEMORYSTATUS_CMD_GET_MEMLIMIT_PROPERTIES
*/
typedef struct memorystatus_memlimit_properties {
int32_t memlimit_active; /* jetsam memory limit (in MB) when process is active */
uint32_t memlimit_active_attr;
int32_t memlimit_inactive; /* jetsam memory limit (in MB) when process is inactive */
uint32_t memlimit_inactive_attr;
} memorystatus_memlimit_properties_t;
typedef struct memorystatus_memlimit_properties2 {
memorystatus_memlimit_properties_t v1;
uint32_t memlimit_increase; /* jetsam memory limit increase (in MB) for active and inactive states */
uint32_t memlimit_increase_bytes; /* bytes used to determine the jetsam memory limit increase, for active and inactive states */
} memorystatus_memlimit_properties2_t;
#define MEMORYSTATUS_MEMLIMIT_ATTR_FATAL 0x1 /* if set, exceeding the memlimit is fatal */
/*
* For use with diagnostics memorystatus_control:
* MEMORYSTATUS_CMD_SET_DIAG_LIMIT
*/
typedef struct memorystatus_diag_memlimit_properties {
uint64_t memlimit; /* max limit for memory usage before an exception is thrown expressed in bytes, but rounded internally to Mbytes */
bool threshold_enabled; /* Current status of the diagnostics threshold, only for get operations, not consider in set threshold */
} memorystatus_diag_memlimit_properties_t;
#ifdef XNU_KERNEL_PRIVATE
/*
* A process will be killed immediately if it crosses a memory limit marked as fatal.
* Fatal limit types are the
* - default system-wide task limit
* - per-task custom memory limit
*
* A process with a non-fatal memory limit can exceed that limit, but becomes an early
* candidate for jetsam when the device is under memory pressure.
* Non-fatal limit types are the
* - high-water-mark limit
*
* Processes that opt into dirty tracking are evaluated
* based on clean vs dirty state.
* dirty ==> active
* clean ==> inactive
*
* Processes that do not opt into dirty tracking are
* evalulated based on priority level.
* Foreground or above ==> active
* Below Foreground ==> inactive
*/
/*
* p_memstat_state flag holds
* - in kernel process state and memlimit state
*/
#define P_MEMSTAT_SUSPENDED 0x00000001 /* Process is suspended and likely in the IDLE band */
#define P_MEMSTAT_FROZEN 0x00000002 /* Process has some state on disk. It should be suspended */
#define P_MEMSTAT_FREEZE_DISABLED 0x00000004 /* Process isn't freeze-eligible and will not be frozen */
#define P_MEMSTAT_ERROR 0x00000008 /* Process couldn't be jetsammed for some reason. Transient state so jetsam can skip it next time it sees it */
#define P_MEMSTAT_LOCKED 0x00000010 /* Process is being actively worked on behind the proc_list_lock */
#define P_MEMSTAT_TERMINATED 0x00000020 /* Process is exiting */
#define P_MEMSTAT_FREEZE_IGNORE 0x00000040 /* Process was evaluated by freezer and will be ignored till the next time it goes active and does something */
#define P_MEMSTAT_PRIORITYUPDATED 0x00000080 /* Process had its jetsam priority updated */
#define P_MEMSTAT_FOREGROUND 0x00000100 /* Process is in the FG jetsam band...unused??? */
#define P_MEMSTAT_REFREEZE_ELIGIBLE 0x00000400 /* Process was once thawed i.e. its state was brought back from disk. It is now refreeze eligible.*/
#define P_MEMSTAT_MANAGED 0x00000800 /* Process is managed by RunningBoard i.e. is either application or extension */
#define P_MEMSTAT_INTERNAL 0x00001000 /* Process is a system-critical-not-be-jetsammed process i.e. launchd */
#define P_MEMSTAT_FATAL_MEMLIMIT 0x00002000 /* current fatal state of the process's memlimit */
#define P_MEMSTAT_MEMLIMIT_ACTIVE_FATAL 0x00004000 /* if set, exceeding limit is fatal when the process is active */
#define P_MEMSTAT_MEMLIMIT_INACTIVE_FATAL 0x00008000 /* if set, exceeding limit is fatal when the process is inactive */
#define P_MEMSTAT_USE_ELEVATED_INACTIVE_BAND 0x00010000 /* if set, the process will go into this band & stay there when in the background instead
* of the aging bands and/or the IDLE band. */
#define P_MEMSTAT_PRIORITY_ASSERTION 0x00020000 /* jetsam priority is being driven by an assertion */
#define P_MEMSTAT_FREEZE_CONSIDERED 0x00040000 /* This process has been considered for the freezer. */
#define P_MEMSTAT_SKIP 0x00080000 /* Process is temporarily ineligible for memory pressure kills. Used only on development & debug kernels to make corpses of buggy processes */
#define P_MEMSTAT_FROZEN_XPC_SERVICE 0x00100000 /* Process is an XPC service. Only used for freezer telemetry. */
#define P_MEMSTAT_FROZEN_FOCAL_THAW 0x00200000 /* Process has been thawed while focal in the current freezer interval. Only used for freezer telemetry. */
/*
* p_memstat_relaunch_flags holds
* - relaunch behavior when jetsammed
*/
#define P_MEMSTAT_RELAUNCH_UNKNOWN 0x0
#define P_MEMSTAT_RELAUNCH_LOW 0x1
#define P_MEMSTAT_RELAUNCH_MED 0x2
#define P_MEMSTAT_RELAUNCH_HIGH 0x4
/*
* Checking the p_memstat_state almost always requires the proc_list_lock
* because the jetsam thread could be on the other core changing the state.
*
* App -- almost always managed by a system process. Always have dirty tracking OFF. Can include extensions too.
* System Processes -- not managed by anybody. Always have dirty tracking ON. Can include extensions (here) too.
*/
#define isApp(p) ((p->p_memstat_state & P_MEMSTAT_MANAGED) || ! (p->p_memstat_dirty & P_DIRTY_TRACK))
#define isSysProc(p) ( ! (p->p_memstat_state & P_MEMSTAT_MANAGED) || (p->p_memstat_dirty & P_DIRTY_TRACK))
#define MEMSTAT_BUCKET_COUNT (JETSAM_PRIORITY_MAX + 1)
typedef struct memstat_bucket {
TAILQ_HEAD(, proc) list;
int count;
int relaunch_high_count;
} memstat_bucket_t;
extern memstat_bucket_t memstat_bucket[MEMSTAT_BUCKET_COUNT];
/*
* Table that expresses the probability of a process
* being used in the next hour.
*/
typedef struct memorystatus_internal_probabilities {
char proc_name[MAXCOMLEN + 1];
int use_probability;
} memorystatus_internal_probabilities_t;
extern memorystatus_internal_probabilities_t *memorystatus_global_probabilities_table;
extern size_t memorystatus_global_probabilities_size;
extern void memorystatus_init(void);
extern void memorystatus_init_at_boot_snapshot(void);
extern int memorystatus_add(proc_t p, boolean_t locked);
extern int memorystatus_update(proc_t p, int priority, uint64_t user_data, boolean_t is_assertion, boolean_t effective,
boolean_t update_memlimit, int32_t memlimit_active, boolean_t memlimit_active_is_fatal,
int32_t memlimit_inactive, boolean_t memlimit_inactive_is_fatal);
/* Remove this process from jetsam bands for killing or freezing.
* The proc_list_lock is held by the caller.
* @param p: The process to remove.
* @return: 0 if successful. EAGAIN if the process can't be removed right now (because it's being frozen) or ESRCH.
*/
extern int memorystatus_remove(proc_t p);
int memorystatus_update_inactive_jetsam_priority_band(pid_t pid, uint32_t opflags, int priority, boolean_t effective_now);
int memorystatus_relaunch_flags_update(proc_t p, int relaunch_flags);
extern int memorystatus_dirty_track(proc_t p, uint32_t pcontrol);
extern int memorystatus_dirty_set(proc_t p, boolean_t self, uint32_t pcontrol);
extern int memorystatus_dirty_get(proc_t p, boolean_t locked);
extern int memorystatus_dirty_clear(proc_t p, uint32_t pcontrol);
extern int memorystatus_on_terminate(proc_t p);
extern void memorystatus_on_suspend(proc_t p);
extern void memorystatus_on_resume(proc_t p);
extern void memorystatus_on_inactivity(proc_t p);
extern void memorystatus_on_pageout_scan_end(void);
/* Memorystatus kevent */
void memorystatus_kevent_init(lck_grp_t *grp, lck_attr_t *attr);
int memorystatus_knote_register(struct knote *kn);
void memorystatus_knote_unregister(struct knote *kn);
#if CONFIG_MEMORYSTATUS
void memorystatus_log_exception(const int max_footprint_mb, boolean_t memlimit_is_active, boolean_t memlimit_is_fatal);
void memorystatus_log_diag_threshold_exception(const int diag_threshold_value);
void memorystatus_on_ledger_footprint_exceeded(int warning, boolean_t memlimit_is_active, boolean_t memlimit_is_fatal);
void proc_memstat_skip(proc_t p, boolean_t set);
void memorystatus_proc_flags_unsafe(void * v, boolean_t *is_dirty, boolean_t *is_dirty_tracked, boolean_t *allow_idle_exit);
#if __arm64__
void memorystatus_act_on_legacy_footprint_entitlement(proc_t p, boolean_t footprint_increase);
void memorystatus_act_on_ios13extended_footprint_entitlement(proc_t p);
void memorystatus_act_on_entitled_task_limit(proc_t p);
#endif /* __arm64__ */
#endif /* CONFIG_MEMORYSTATUS */
int memorystatus_get_pressure_status_kdp(void);
int memorystatus_get_proccnt_upto_priority(int32_t max_bucket_index);
#if CONFIG_JETSAM
typedef enum memorystatus_policy {
kPolicyDefault = 0x0,
kPolicyMoreFree = 0x1,
} memorystatus_policy_t;
extern unsigned int memorystatus_swap_all_apps;
/*
* Synchronous memorystatus kill calls.
*/
boolean_t memorystatus_kill_on_VM_page_shortage(void);
boolean_t memorystatus_kill_on_vnode_limit(void);
boolean_t memorystatus_kill_on_sustained_pressure(void);
/*
* Wake up the memorystatus thread so it can do async kills.
* The memorystatus thread will keep killing until the system is
* considered healthy.
*/
void memorystatus_thread_wake(void);
/*
* Attempt to kill the specified pid with the given reason.
* Consumes a reference on the jetsam_reason.
*/
boolean_t memorystatus_kill_with_jetsam_reason_sync(pid_t pid, os_reason_t jetsam_reason);
void jetsam_on_ledger_cpulimit_exceeded(void);
void memorystatus_fast_jetsam_override(boolean_t enable_override);
/*
* Disable memorystatus_swap_all_apps.
* Used by vm_pageout at boot if the swap volume is too small to support app swap.
* Returns true iff app swap is now disabled.
* On development or debug kernels, app swap can be enabled via a boot-arg and in
* that case can not be disabled.
*/
bool memorystatus_disable_swap(void);
#endif /* CONFIG_JETSAM */
boolean_t memorystatus_kill_on_zone_map_exhaustion(pid_t pid);
boolean_t memorystatus_kill_on_VM_compressor_space_shortage(boolean_t async);
void memorystatus_kill_on_vps_starvation(void);
void memorystatus_pages_update(unsigned int pages_avail);
boolean_t memorystatus_idle_exit_from_VM(void);
proc_t memorystatus_get_first_proc_locked(unsigned int *bucket_index, boolean_t search);
proc_t memorystatus_get_next_proc_locked(unsigned int *bucket_index, proc_t p, boolean_t search);
void memorystatus_get_task_page_counts(task_t task, uint32_t *footprint, uint32_t *max_footprint_lifetime, uint32_t *purgeable_pages);
void memorystatus_invalidate_idle_demotion_locked(proc_t p, boolean_t clean_state);
void memorystatus_update_priority_locked(proc_t p, int priority, boolean_t head_insert, boolean_t skip_demotion_check);
bool memorystatus_task_has_increased_memory_limit_entitlement(task_t task);
bool memorystatus_task_has_legacy_footprint_entitlement(task_t task);
bool memorystatus_task_has_ios13extended_footprint_limit(task_t task);
#if VM_PRESSURE_EVENTS
extern kern_return_t memorystatus_update_vm_pressure(boolean_t);
#if CONFIG_MEMORYSTATUS
/* Flags */
extern int memorystatus_low_mem_privileged_listener(uint32_t op_flags);
extern int memorystatus_send_pressure_note(int pid);
extern boolean_t memorystatus_is_foreground_locked(proc_t p);
extern boolean_t memorystatus_bg_pressure_eligible(proc_t p);
#endif /* CONFIG_MEMORYSTATUS */
#endif /* VM_PRESSURE_EVENTS */
#endif /* XNU_KERNEL_PRIVATE */
#endif /* SYS_MEMORYSTATUS_H */
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