xnu-7195.101.1.tar.gz

[apple/xnu.git] / bsd / kern / kern_memorystatus.c

diff --git a/bsd/kern/kern_memorystatus.c b/bsd/kern/kern_memorystatus.c
index afc9271dc01e625bec98b6aee0817067eb95cd86..677c73b03ddfb113b9a66b62974f586826b9baed 100644 (file)
--- a/bsd/kern/kern_memorystatus.c
+++ b/bsd/kern/kern_memorystatus.c
@@ -38,8 +38,6 @@
 #include <kern/policy_internal.h>
 #include <kern/thread_group.h>
 
 #include <kern/policy_internal.h>
 #include <kern/thread_group.h>
 

-#include <IOKit/IOBSD.h>
-

 #include <corpses/task_corpse.h>
 #include <libkern/libkern.h>
 #include <mach/coalition.h>
 #include <corpses/task_corpse.h>
 #include <libkern/libkern.h>
 #include <mach/coalition.h>


@@ -61,12 +59,15 @@
 #include <sys/wait.h>
 #include <sys/tree.h>
 #include <sys/priv.h>
 #include <sys/wait.h>
 #include <sys/tree.h>
 #include <sys/priv.h>

+#include <vm/pmap.h>

 #include <vm/vm_pageout.h>
 #include <vm/vm_protos.h>
 #include <mach/machine/sdt.h>
 #include <libkern/section_keywords.h>
 #include <stdatomic.h>
 
 #include <vm/vm_pageout.h>
 #include <vm/vm_protos.h>
 #include <mach/machine/sdt.h>
 #include <libkern/section_keywords.h>
 #include <stdatomic.h>
 

+#include <IOKit/IOBSD.h>
+

 #if CONFIG_FREEZE
 #include <vm/vm_map.h>
 #endif /* CONFIG_FREEZE */
 #if CONFIG_FREEZE
 #include <vm/vm_map.h>
 #endif /* CONFIG_FREEZE */


@@ -227,6 +228,21 @@ unsigned long sysproc_aging_aggr_threshold_percentage = 7;
  */
 memorystatus_jetsam_snapshot_t *memorystatus_jetsam_snapshot;
 memorystatus_jetsam_snapshot_t *memorystatus_jetsam_snapshot_copy;
  */
 memorystatus_jetsam_snapshot_t *memorystatus_jetsam_snapshot;
 memorystatus_jetsam_snapshot_t *memorystatus_jetsam_snapshot_copy;

+
+#if CONFIG_FREEZE
+memorystatus_jetsam_snapshot_t *memorystatus_jetsam_snapshot_freezer;
+/*
+ * The size of the freezer snapshot is given by memorystatus_jetsam_snapshot_max / JETSAM_SNAPSHOT_FREEZER_MAX_FACTOR
+ * The freezer snapshot can be much smaller than the default snapshot
+ * because it only includes apps that have been killed and dasd consumes it every 30 minutes.
+ * Since the snapshots are always wired we don't want to overallocate too much.
+ */
+#define JETSAM_SNAPSHOT_FREEZER_MAX_FACTOR 20
+unsigned int memorystatus_jetsam_snapshot_freezer_max;
+unsigned int memorystatus_jetsam_snapshot_freezer_size;
+TUNABLE(bool, memorystatus_jetsam_use_freezer_snapshot, "kern.jetsam_user_freezer_snapshot", true);
+#endif /* CONFIG_FREEZE */
+

 unsigned int memorystatus_jetsam_snapshot_count = 0;
 unsigned int memorystatus_jetsam_snapshot_copy_count = 0;
 unsigned int memorystatus_jetsam_snapshot_max = 0;
 unsigned int memorystatus_jetsam_snapshot_count = 0;
 unsigned int memorystatus_jetsam_snapshot_copy_count = 0;
 unsigned int memorystatus_jetsam_snapshot_max = 0;


@@ -234,14 +250,36 @@ unsigned int memorystatus_jetsam_snapshot_size = 0;
 uint64_t memorystatus_jetsam_snapshot_last_timestamp = 0;
 uint64_t memorystatus_jetsam_snapshot_timeout = 0;
 
 uint64_t memorystatus_jetsam_snapshot_last_timestamp = 0;
 uint64_t memorystatus_jetsam_snapshot_timeout = 0;
 

+#if DEVELOPMENT || DEBUG
+/*
+ * On development and debug kernels, we allow one pid to take ownership
+ * of some memorystatus data structures for testing purposes (via memorystatus_control).
+ * If there's an owner, then only they may consume the jetsam snapshot & set freezer probabilities.
+ * This is used when testing these interface to avoid racing with other
+ * processes on the system that typically use them (namely OSAnalytics & dasd).
+ */
+static pid_t memorystatus_testing_pid = 0;
+SYSCTL_INT(_kern, OID_AUTO, memorystatus_testing_pid, CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_LOCKED, &memorystatus_testing_pid, 0, "");
+#endif /* DEVELOPMENT || DEBUG */
+static void memorystatus_init_jetsam_snapshot_header(memorystatus_jetsam_snapshot_t *snapshot);
+

 /* General memorystatus stuff */
 
 uint64_t memorystatus_sysprocs_idle_delay_time = 0;
 uint64_t memorystatus_apps_idle_delay_time = 0;
 /* General memorystatus stuff */
 
 uint64_t memorystatus_sysprocs_idle_delay_time = 0;
 uint64_t memorystatus_apps_idle_delay_time = 0;

+/* Some devices give entitled apps a higher memory limit */
+#if __arm64__
+int32_t memorystatus_entitled_max_task_footprint_mb = 0;

 
 

-static lck_grp_attr_t *memorystatus_jetsam_fg_band_lock_grp_attr;
-static lck_grp_t *memorystatus_jetsam_fg_band_lock_grp;
-lck_mtx_t memorystatus_jetsam_fg_band_lock;
+#if DEVELOPMENT || DEBUG
+SYSCTL_INT(_kern, OID_AUTO, entitled_max_task_pmem, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &memorystatus_entitled_max_task_footprint_mb, 0, "");
+#endif /* DEVELOPMENT || DEBUG */
+#endif /* __arm64__ */
+
+static LCK_GRP_DECLARE(memorystatus_jetsam_fg_band_lock_grp,
+    "memorystatus_jetsam_fg_band");
+LCK_MTX_DECLARE(memorystatus_jetsam_fg_band_lock,
+    &memorystatus_jetsam_fg_band_lock_grp);

 
 /* Idle guard handling */
 
 
 /* Idle guard handling */
 


@@ -481,7 +519,7 @@ sysctl_jetsam_set_sysprocs_idle_delay_time SYSCTL_HANDLER_ARGS
        uint64_t old_time_in_ns = 0;
 
        absolutetime_to_nanoseconds(memorystatus_sysprocs_idle_delay_time, &old_time_in_ns);
        uint64_t old_time_in_ns = 0;
 
        absolutetime_to_nanoseconds(memorystatus_sysprocs_idle_delay_time, &old_time_in_ns);

-       old_time_in_secs = old_time_in_ns / NSEC_PER_SEC;
+       old_time_in_secs = (int) (old_time_in_ns / NSEC_PER_SEC);

 
        error = sysctl_io_number(req, old_time_in_secs, sizeof(int), &val, NULL);
        if (error || !req->newptr) {
 
        error = sysctl_io_number(req, old_time_in_secs, sizeof(int), &val, NULL);
        if (error || !req->newptr) {


@@ -511,7 +549,7 @@ sysctl_jetsam_set_apps_idle_delay_time SYSCTL_HANDLER_ARGS
        uint64_t old_time_in_ns = 0;
 
        absolutetime_to_nanoseconds(memorystatus_apps_idle_delay_time, &old_time_in_ns);
        uint64_t old_time_in_ns = 0;
 
        absolutetime_to_nanoseconds(memorystatus_apps_idle_delay_time, &old_time_in_ns);

-       old_time_in_secs = old_time_in_ns / NSEC_PER_SEC;
+       old_time_in_secs = (int) (old_time_in_ns / NSEC_PER_SEC);

 
        error = sysctl_io_number(req, old_time_in_secs, sizeof(int), &val, NULL);
        if (error || !req->newptr) {
 
        error = sysctl_io_number(req, old_time_in_secs, sizeof(int), &val, NULL);
        if (error || !req->newptr) {


@@ -541,7 +579,6 @@ static int memorystatus_highwater_enabled = 1;  /* Update the cached memlimit da
 static boolean_t proc_jetsam_state_is_active_locked(proc_t);
 
 #if __arm64__
 static boolean_t proc_jetsam_state_is_active_locked(proc_t);
 
 #if __arm64__

-#if CONFIG_MEMORYSTATUS

 int legacy_footprint_bonus_mb = 50; /* This value was chosen after looking at the top 30 apps
                                      * that needed the additional room in their footprint when
                                      * the 'correct' accounting methods were applied to them.
 int legacy_footprint_bonus_mb = 50; /* This value was chosen after looking at the top 30 apps
                                      * that needed the additional room in their footprint when
                                      * the 'correct' accounting methods were applied to them.


@@ -550,18 +587,19 @@ int legacy_footprint_bonus_mb = 50; /* This value was chosen after looking at th
 #if DEVELOPMENT || DEBUG
 SYSCTL_INT(_kern, OID_AUTO, legacy_footprint_bonus_mb, CTLFLAG_RW | CTLFLAG_LOCKED, &legacy_footprint_bonus_mb, 0, "");
 #endif /* DEVELOPMENT || DEBUG */
 #if DEVELOPMENT || DEBUG
 SYSCTL_INT(_kern, OID_AUTO, legacy_footprint_bonus_mb, CTLFLAG_RW | CTLFLAG_LOCKED, &legacy_footprint_bonus_mb, 0, "");
 #endif /* DEVELOPMENT || DEBUG */

-
-void
-memorystatus_act_on_legacy_footprint_entitlement(proc_t p, boolean_t footprint_increase)
+/*
+ * Raise the inactive and active memory limits to new values.
+ * Will only raise the limits and will do nothing if either of the current
+ * limits are 0.
+ * Caller must hold the proc_list_lock
+ */
+static void
+memorystatus_raise_memlimit(proc_t p, int new_memlimit_active, int new_memlimit_inactive)

 {
        int memlimit_mb_active = 0, memlimit_mb_inactive = 0;
 {
        int memlimit_mb_active = 0, memlimit_mb_inactive = 0;

-       boolean_t memlimit_active_is_fatal = FALSE, memlimit_inactive_is_fatal = 0, use_active_limit = FALSE;
+       boolean_t memlimit_active_is_fatal = FALSE, memlimit_inactive_is_fatal = FALSE, use_active_limit = FALSE;

 
 

-       if (p == NULL) {
-               return;
-       }
-
-       proc_list_lock();
+       LCK_MTX_ASSERT(&proc_list_mlock, LCK_MTX_ASSERT_OWNED);

 
        if (p->p_memstat_memlimit_active > 0) {
                memlimit_mb_active = p->p_memstat_memlimit_active;
 
        if (p->p_memstat_memlimit_active > 0) {
                memlimit_mb_active = p->p_memstat_memlimit_active;


@@ -573,7 +611,6 @@ memorystatus_act_on_legacy_footprint_entitlement(proc_t p, boolean_t footprint_i
                 * a special value only used internally
                 * to test 'no limits'.
                 */
                 * a special value only used internally
                 * to test 'no limits'.
                 */

-               proc_list_unlock();

                return;
        }
 
                return;
        }
 


@@ -587,24 +624,11 @@ memorystatus_act_on_legacy_footprint_entitlement(proc_t p, boolean_t footprint_i
                 * a special value only used internally
                 * to test 'no limits'.
                 */
                 * a special value only used internally
                 * to test 'no limits'.
                 */

-               proc_list_unlock();

                return;
        }
 
                return;
        }
 

-       if (footprint_increase) {
-               memlimit_mb_active += legacy_footprint_bonus_mb;
-               memlimit_mb_inactive += legacy_footprint_bonus_mb;
-       } else {
-               memlimit_mb_active -= legacy_footprint_bonus_mb;
-               if (memlimit_mb_active == max_task_footprint_mb) {
-                       memlimit_mb_active = -1; /* reverting back to default system limit */
-               }
-
-               memlimit_mb_inactive -= legacy_footprint_bonus_mb;
-               if (memlimit_mb_inactive == max_task_footprint_mb) {
-                       memlimit_mb_inactive = -1; /* reverting back to default system limit */
-               }
-       }
+       memlimit_mb_active = MAX(new_memlimit_active, memlimit_mb_active);
+       memlimit_mb_inactive = MAX(new_memlimit_inactive, memlimit_mb_inactive);

 
        memlimit_active_is_fatal = (p->p_memstat_state & P_MEMSTAT_MEMLIMIT_ACTIVE_FATAL);
        memlimit_inactive_is_fatal = (p->p_memstat_state & P_MEMSTAT_MEMLIMIT_INACTIVE_FATAL);
 
        memlimit_active_is_fatal = (p->p_memstat_state & P_MEMSTAT_MEMLIMIT_ACTIVE_FATAL);
        memlimit_inactive_is_fatal = (p->p_memstat_state & P_MEMSTAT_MEMLIMIT_INACTIVE_FATAL);


@@ -619,7 +643,6 @@ memorystatus_act_on_legacy_footprint_entitlement(proc_t p, boolean_t footprint_i
                CACHE_INACTIVE_LIMITS_LOCKED(p, memlimit_inactive_is_fatal);
        }
 
                CACHE_INACTIVE_LIMITS_LOCKED(p, memlimit_inactive_is_fatal);
        }
 

-

        if (memorystatus_highwater_enabled) {
                task_set_phys_footprint_limit_internal(p->task,
                    (p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit : -1,
        if (memorystatus_highwater_enabled) {
                task_set_phys_footprint_limit_internal(p->task,
                    (p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit : -1,


@@ -627,19 +650,14 @@ memorystatus_act_on_legacy_footprint_entitlement(proc_t p, boolean_t footprint_i
                    use_active_limit,                                    /*active limit?*/
                    (use_active_limit ? memlimit_active_is_fatal : memlimit_inactive_is_fatal));
        }
                    use_active_limit,                                    /*active limit?*/
                    (use_active_limit ? memlimit_active_is_fatal : memlimit_inactive_is_fatal));
        }

-
-       proc_list_unlock();

 }
 
 void
 }
 
 void

-memorystatus_act_on_ios13extended_footprint_entitlement(proc_t p)
+memorystatus_act_on_legacy_footprint_entitlement(proc_t p, boolean_t footprint_increase)

 {
        int memlimit_mb_active = 0, memlimit_mb_inactive = 0;
 {
        int memlimit_mb_active = 0, memlimit_mb_inactive = 0;

-       boolean_t memlimit_active_is_fatal = FALSE, memlimit_inactive_is_fatal = 0, use_active_limit = FALSE;

 
 

-       if (max_mem < 1500ULL * 1024 * 1024 ||
-           max_mem > 2ULL * 1024 * 1024 * 1024) {
-               /* ios13extended_footprint is only for 2GB devices */
+       if (p == NULL) {

                return;
        }
 
                return;
        }
 


@@ -673,50 +691,54 @@ memorystatus_act_on_ios13extended_footprint_entitlement(proc_t p)
                return;
        }
 
                return;
        }
 

-       /* limit to "almost 2GB" */
-       int ios13extended_footprint_mb = 1800;
-       if (memlimit_mb_active > ios13extended_footprint_mb) {
-               /* do not lower the current limit */
-               proc_list_unlock();
-               return;
-       }
-       memlimit_mb_active = ios13extended_footprint_mb;
-       memlimit_mb_inactive = ios13extended_footprint_mb;
-
-       memlimit_active_is_fatal = (p->p_memstat_state & P_MEMSTAT_MEMLIMIT_ACTIVE_FATAL);
-       memlimit_inactive_is_fatal = (p->p_memstat_state & P_MEMSTAT_MEMLIMIT_INACTIVE_FATAL);
-
-       SET_ACTIVE_LIMITS_LOCKED(p, memlimit_mb_active, memlimit_active_is_fatal);
-       SET_INACTIVE_LIMITS_LOCKED(p, memlimit_mb_inactive, memlimit_inactive_is_fatal);
-
-       if (proc_jetsam_state_is_active_locked(p) == TRUE) {
-               use_active_limit = TRUE;
-               CACHE_ACTIVE_LIMITS_LOCKED(p, memlimit_active_is_fatal);
+       if (footprint_increase) {
+               memlimit_mb_active += legacy_footprint_bonus_mb;
+               memlimit_mb_inactive += legacy_footprint_bonus_mb;

        } else {
        } else {

-               CACHE_INACTIVE_LIMITS_LOCKED(p, memlimit_inactive_is_fatal);
+               memlimit_mb_active -= legacy_footprint_bonus_mb;
+               if (memlimit_mb_active == max_task_footprint_mb) {
+                       memlimit_mb_active = -1; /* reverting back to default system limit */
+               }
+
+               memlimit_mb_inactive -= legacy_footprint_bonus_mb;
+               if (memlimit_mb_inactive == max_task_footprint_mb) {
+                       memlimit_mb_inactive = -1; /* reverting back to default system limit */
+               }

        }
        }

+       memorystatus_raise_memlimit(p, memlimit_mb_active, memlimit_mb_inactive);

 
 

+       proc_list_unlock();
+}

 
 

-       if (memorystatus_highwater_enabled) {
-               task_set_phys_footprint_limit_internal(p->task,
-                   (p->p_memstat_memlimit > 0) ? p->p_memstat_memlimit : -1,
-                   NULL,                                    /*return old value */
-                   use_active_limit,                                    /*active limit?*/
-                   (use_active_limit ? memlimit_active_is_fatal : memlimit_inactive_is_fatal));
+void
+memorystatus_act_on_ios13extended_footprint_entitlement(proc_t p)
+{
+       if (max_mem < 1500ULL * 1024 * 1024 ||
+           max_mem > 2ULL * 1024 * 1024 * 1024) {
+               /* ios13extended_footprint is only for 2GB devices */
+               return;

        }
        }

-
+       /* limit to "almost 2GB" */
+       proc_list_lock();
+       memorystatus_raise_memlimit(p, 1800, 1800);

        proc_list_unlock();
 }
 
        proc_list_unlock();
 }
 

-#endif /* CONFIG_MEMORYSTATUS */
+void
+memorystatus_act_on_entitled_task_limit(proc_t p)
+{
+       if (memorystatus_entitled_max_task_footprint_mb == 0) {
+               // Entitlement is not supported on this device.
+               return;
+       }
+       proc_list_lock();
+       memorystatus_raise_memlimit(p, memorystatus_entitled_max_task_footprint_mb, memorystatus_entitled_max_task_footprint_mb);
+       proc_list_unlock();
+}

 #endif /* __arm64__ */
 
 #endif /* __arm64__ */
 

-#if CONFIG_EMBEDDED
-

 SYSCTL_INT(_kern, OID_AUTO, memorystatus_level, CTLFLAG_RD | CTLFLAG_LOCKED, &memorystatus_level, 0, "");
 
 SYSCTL_INT(_kern, OID_AUTO, memorystatus_level, CTLFLAG_RD | CTLFLAG_LOCKED, &memorystatus_level, 0, "");
 

-#endif /* CONFIG_EMBEDDED */
-

 int
 memorystatus_get_level(__unused struct proc *p, struct memorystatus_get_level_args *args, __unused int *ret)
 {
 int
 memorystatus_get_level(__unused struct proc *p, struct memorystatus_get_level_args *args, __unused int *ret)
 {


@@ -805,7 +827,7 @@ static void memorystatus_get_task_phys_footprint_page_counts(task_t task,
     uint64_t *internal_pages, uint64_t *internal_compressed_pages,
     uint64_t *purgeable_nonvolatile_pages, uint64_t *purgeable_nonvolatile_compressed_pages,
     uint64_t *alternate_accounting_pages, uint64_t *alternate_accounting_compressed_pages,
     uint64_t *internal_pages, uint64_t *internal_compressed_pages,
     uint64_t *purgeable_nonvolatile_pages, uint64_t *purgeable_nonvolatile_compressed_pages,
     uint64_t *alternate_accounting_pages, uint64_t *alternate_accounting_compressed_pages,

-    uint64_t *iokit_mapped_pages, uint64_t *page_table_pages);
+    uint64_t *iokit_mapped_pages, uint64_t *page_table_pages, uint64_t *frozen_to_swap_pages);

 
 static void memorystatus_get_task_memory_region_count(task_t task, uint64_t *count);
 
 
 static void memorystatus_get_task_memory_region_count(task_t task, uint64_t *count);
 


@@ -838,6 +860,13 @@ extern unsigned int    vm_page_inactive_count;
 extern unsigned int    vm_page_throttled_count;
 extern unsigned int    vm_page_purgeable_count;
 extern unsigned int    vm_page_wire_count;
 extern unsigned int    vm_page_throttled_count;
 extern unsigned int    vm_page_purgeable_count;
 extern unsigned int    vm_page_wire_count;

+extern unsigned int    vm_page_speculative_count;
+
+#if CONFIG_JETSAM
+#define MEMORYSTATUS_LOG_AVAILABLE_PAGES memorystatus_available_pages
+#else /* CONFIG_JETSAM */
+#define MEMORYSTATUS_LOG_AVAILABLE_PAGES (vm_page_active_count + vm_page_inactive_count + vm_page_free_count + vm_page_speculative_count)
+#endif /* CONFIG_JETSAM */

 #if CONFIG_SECLUDED_MEMORY
 extern unsigned int     vm_page_secluded_count;
 extern unsigned int     vm_page_secluded_count_over_target;
 #if CONFIG_SECLUDED_MEMORY
 extern unsigned int     vm_page_secluded_count;
 extern unsigned int     vm_page_secluded_count_over_target;


@@ -890,11 +919,10 @@ int32_t max_kill_priority = JETSAM_PRIORITY_IDLE;
 
 #if DEVELOPMENT || DEBUG
 
 
 #if DEVELOPMENT || DEBUG
 

-lck_grp_attr_t *disconnect_page_mappings_lck_grp_attr;
-lck_grp_t *disconnect_page_mappings_lck_grp;
-static lck_mtx_t disconnect_page_mappings_mutex;
+static LCK_GRP_DECLARE(disconnect_page_mappings_lck_grp, "disconnect_page_mappings");
+static LCK_MTX_DECLARE(disconnect_page_mappings_mutex, &disconnect_page_mappings_lck_grp);

 
 

-extern boolean_t kill_on_no_paging_space;
+extern bool kill_on_no_paging_space;

 #endif /* DEVELOPMENT || DEBUG */
 
 
 #endif /* DEVELOPMENT || DEBUG */
 
 


@@ -1132,6 +1160,39 @@ SYSCTL_PROC(_kern, OID_AUTO, memorystatus_disconnect_page_mappings, CTLTYPE_INT
 
 #endif /* DEVELOPMENT || DEBUG */
 
 
 #endif /* DEVELOPMENT || DEBUG */
 

+/*
+ * Sorts the given bucket.
+ *
+ * Input:
+ *     bucket_index - jetsam priority band to be sorted.
+ *     sort_order - JETSAM_SORT_xxx from kern_memorystatus.h
+ *             Currently sort_order is only meaningful when handling
+ *             coalitions.
+ *
+ * proc_list_lock must be held by the caller.
+ */
+static void
+memorystatus_sort_bucket_locked(unsigned int bucket_index, int sort_order)
+{
+       LCK_MTX_ASSERT(&proc_list_mlock, LCK_MTX_ASSERT_OWNED);
+       if (memstat_bucket[bucket_index].count == 0) {
+               return;
+       }
+
+       switch (bucket_index) {
+       case JETSAM_PRIORITY_FOREGROUND:
+               if (memorystatus_sort_by_largest_coalition_locked(bucket_index, sort_order) == 0) {
+                       /*
+                        * Fall back to per process sorting when zero coalitions are found.
+                        */
+                       memorystatus_sort_by_largest_process_locked(bucket_index);
+               }
+               break;
+       default:
+               memorystatus_sort_by_largest_process_locked(bucket_index);
+               break;
+       }
+}

 
 /*
  * Picks the sorting routine for a given jetsam priority band.
 
 /*
  * Picks the sorting routine for a given jetsam priority band.


@@ -1174,25 +1235,7 @@ memorystatus_sort_bucket(unsigned int bucket_index, int sort_order)
 #endif
 
        proc_list_lock();
 #endif
 
        proc_list_lock();

-
-       if (memstat_bucket[bucket_index].count == 0) {
-               proc_list_unlock();
-               return 0;
-       }
-
-       switch (bucket_index) {
-       case JETSAM_PRIORITY_FOREGROUND:
-               if (memorystatus_sort_by_largest_coalition_locked(bucket_index, coal_sort_order) == 0) {
-                       /*
-                        * Fall back to per process sorting when zero coalitions are found.
-                        */
-                       memorystatus_sort_by_largest_process_locked(bucket_index);
-               }
-               break;
-       default:
-               memorystatus_sort_by_largest_process_locked(bucket_index);
-               break;
-       }
+       memorystatus_sort_bucket_locked(bucket_index, coal_sort_order);

        proc_list_unlock();
 
        return 0;
        proc_list_unlock();
 
        return 0;


@@ -1321,7 +1364,16 @@ int max_jetsam_threads = JETSAM_THREADS_LIMIT;
  * - Raise the jetsam threshold ("clear-the-deck")
  * - Enabled parallel jetsam on eligible devices
  */
  * - Raise the jetsam threshold ("clear-the-deck")
  * - Enabled parallel jetsam on eligible devices
  */

+#if __AMP__
+int fast_jetsam_enabled = 1;
+#else /* __AMP__ */

 int fast_jetsam_enabled = 0;
 int fast_jetsam_enabled = 0;

+#endif /* __AMP__ */
+
+#if CONFIG_DIRTYSTATUS_TRACKING
+int dirtystatus_tracking_enabled = 0;
+SYSCTL_INT(_kern, OID_AUTO, dirtystatus_tracking_enabled, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_LOCKED, &dirtystatus_tracking_enabled, 0, "");
+#endif

 
 /* Routine to find the jetsam state structure for the current jetsam thread */
 static inline struct jetsam_thread_state *
 
 /* Routine to find the jetsam state structure for the current jetsam thread */
 static inline struct jetsam_thread_state *


@@ -1354,21 +1406,11 @@ memorystatus_init(void)
 #endif
 
 #if DEVELOPMENT || DEBUG
 #endif
 
 #if DEVELOPMENT || DEBUG

-       disconnect_page_mappings_lck_grp_attr = lck_grp_attr_alloc_init();
-       disconnect_page_mappings_lck_grp = lck_grp_alloc_init("disconnect_page_mappings", disconnect_page_mappings_lck_grp_attr);
-
-       lck_mtx_init(&disconnect_page_mappings_mutex, disconnect_page_mappings_lck_grp, NULL);
-
-       if (kill_on_no_paging_space == TRUE) {
+       if (kill_on_no_paging_space) {

                max_kill_priority = JETSAM_PRIORITY_MAX;
        }
 #endif
 
                max_kill_priority = JETSAM_PRIORITY_MAX;
        }
 #endif
 

-       memorystatus_jetsam_fg_band_lock_grp_attr = lck_grp_attr_alloc_init();
-       memorystatus_jetsam_fg_band_lock_grp =
-           lck_grp_alloc_init("memorystatus_jetsam_fg_band", memorystatus_jetsam_fg_band_lock_grp_attr);
-       lck_mtx_init(&memorystatus_jetsam_fg_band_lock, memorystatus_jetsam_fg_band_lock_grp, NULL);
-

        /* Init buckets */
        for (i = 0; i < MEMSTAT_BUCKET_COUNT; i++) {
                TAILQ_INIT(&memstat_bucket[i].list);
        /* Init buckets */
        for (i = 0; i < MEMSTAT_BUCKET_COUNT; i++) {
                TAILQ_INIT(&memstat_bucket[i].list);


@@ -1462,11 +1504,11 @@ memorystatus_init(void)
                PE_get_default("kern.jetsam_idle_snapshot", &memorystatus_idle_snapshot, sizeof(memorystatus_idle_snapshot));
        }
 
                PE_get_default("kern.jetsam_idle_snapshot", &memorystatus_idle_snapshot, sizeof(memorystatus_idle_snapshot));
        }
 

-       memorystatus_delta = delta_percentage * atop_64(max_mem) / 100;
-       memorystatus_available_pages_critical_idle_offset = idle_offset_percentage * atop_64(max_mem) / 100;
-       memorystatus_available_pages_critical_base = (critical_threshold_percentage / delta_percentage) * memorystatus_delta;
-       memorystatus_policy_more_free_offset_pages = (policy_more_free_offset_percentage / delta_percentage) * memorystatus_delta;
-       memorystatus_sysproc_aging_aggr_pages = sysproc_aging_aggr_threshold_percentage * atop_64(max_mem) / 100;
+       memorystatus_delta = (unsigned int) (delta_percentage * atop_64(max_mem) / 100);
+       memorystatus_available_pages_critical_idle_offset = (unsigned int) (idle_offset_percentage * atop_64(max_mem) / 100);
+       memorystatus_available_pages_critical_base = (unsigned int) ((critical_threshold_percentage / delta_percentage) * memorystatus_delta);
+       memorystatus_policy_more_free_offset_pages = (unsigned int) ((policy_more_free_offset_percentage / delta_percentage) * memorystatus_delta);
+       memorystatus_sysproc_aging_aggr_pages = (unsigned int) (sysproc_aging_aggr_threshold_percentage * atop_64(max_mem) / 100);

 
        /* Jetsam Loop Detection */
        if (max_mem <= (512 * 1024 * 1024)) {
 
        /* Jetsam Loop Detection */
        if (max_mem <= (512 * 1024 * 1024)) {


@@ -1484,29 +1526,53 @@ memorystatus_init(void)
 
 #endif /* CONFIG_JETSAM */
 
 
 #endif /* CONFIG_JETSAM */
 

+#if __arm64__
+       if (!PE_parse_boot_argn("entitled_max_task_pmem", &memorystatus_entitled_max_task_footprint_mb,
+           sizeof(memorystatus_entitled_max_task_footprint_mb))) {
+               if (!PE_get_default("kern.entitled_max_task_pmem", &memorystatus_entitled_max_task_footprint_mb,
+                   sizeof(memorystatus_entitled_max_task_footprint_mb))) {
+                       // entitled_max_task_pmem is not supported on this system.
+                       memorystatus_entitled_max_task_footprint_mb = 0;
+               }
+       }
+       if (memorystatus_entitled_max_task_footprint_mb > max_mem / (1UL << 20) || memorystatus_entitled_max_task_footprint_mb < 0) {
+               os_log_with_startup_serial(OS_LOG_DEFAULT, "Invalid value (%d) for entitled_max_task_pmem. Setting to 0",
+                   memorystatus_entitled_max_task_footprint_mb);
+       }
+#endif /* __arm64__ */
+

        memorystatus_jetsam_snapshot_max = maxproc;
 
        memorystatus_jetsam_snapshot_size = sizeof(memorystatus_jetsam_snapshot_t) +
            (sizeof(memorystatus_jetsam_snapshot_entry_t) * memorystatus_jetsam_snapshot_max);
 
        memorystatus_jetsam_snapshot_max = maxproc;
 
        memorystatus_jetsam_snapshot_size = sizeof(memorystatus_jetsam_snapshot_t) +
            (sizeof(memorystatus_jetsam_snapshot_entry_t) * memorystatus_jetsam_snapshot_max);
 

-       memorystatus_jetsam_snapshot =
-           (memorystatus_jetsam_snapshot_t*)kalloc(memorystatus_jetsam_snapshot_size);
+       memorystatus_jetsam_snapshot = kalloc_flags(memorystatus_jetsam_snapshot_size, Z_WAITOK | Z_ZERO);

        if (!memorystatus_jetsam_snapshot) {
                panic("Could not allocate memorystatus_jetsam_snapshot");
        }
 
        if (!memorystatus_jetsam_snapshot) {
                panic("Could not allocate memorystatus_jetsam_snapshot");
        }
 

-       memorystatus_jetsam_snapshot_copy =
-           (memorystatus_jetsam_snapshot_t*)kalloc(memorystatus_jetsam_snapshot_size);
+       memorystatus_jetsam_snapshot_copy = kalloc_flags(memorystatus_jetsam_snapshot_size, Z_WAITOK | Z_ZERO);

        if (!memorystatus_jetsam_snapshot_copy) {
                panic("Could not allocate memorystatus_jetsam_snapshot_copy");
        }
 
        if (!memorystatus_jetsam_snapshot_copy) {
                panic("Could not allocate memorystatus_jetsam_snapshot_copy");
        }
 

+#if CONFIG_FREEZE
+       memorystatus_jetsam_snapshot_freezer_max = memorystatus_jetsam_snapshot_max / JETSAM_SNAPSHOT_FREEZER_MAX_FACTOR;
+       memorystatus_jetsam_snapshot_freezer_size = sizeof(memorystatus_jetsam_snapshot_t) +
+           (sizeof(memorystatus_jetsam_snapshot_entry_t) * memorystatus_jetsam_snapshot_freezer_max);
+
+       memorystatus_jetsam_snapshot_freezer = kalloc_flags(memorystatus_jetsam_snapshot_freezer_size, Z_WAITOK | Z_ZERO);
+       if (!memorystatus_jetsam_snapshot_freezer) {
+               panic("Could not allocate memorystatus_jetsam_snapshot_freezer");
+       }
+#endif /* CONFIG_FREEZE */
+

        nanoseconds_to_absolutetime((uint64_t)JETSAM_SNAPSHOT_TIMEOUT_SECS * NSEC_PER_SEC, &memorystatus_jetsam_snapshot_timeout);
 
        memset(&memorystatus_at_boot_snapshot, 0, sizeof(memorystatus_jetsam_snapshot_t));
 
 #if CONFIG_FREEZE
        nanoseconds_to_absolutetime((uint64_t)JETSAM_SNAPSHOT_TIMEOUT_SECS * NSEC_PER_SEC, &memorystatus_jetsam_snapshot_timeout);
 
        memset(&memorystatus_at_boot_snapshot, 0, sizeof(memorystatus_jetsam_snapshot_t));
 
 #if CONFIG_FREEZE

-       memorystatus_freeze_threshold = (freeze_threshold_percentage / delta_percentage) * memorystatus_delta;
+       memorystatus_freeze_threshold = (unsigned int) ((freeze_threshold_percentage / delta_percentage) * memorystatus_delta);

 #endif
 
        /* Check the boot-arg to see if fast jetsam is allowed */
 #endif
 
        /* Check the boot-arg to see if fast jetsam is allowed */


@@ -1531,7 +1597,8 @@ memorystatus_init(void)
        }
 
        /* Initialize the jetsam_threads state array */
        }
 
        /* Initialize the jetsam_threads state array */

-       jetsam_threads = kalloc(sizeof(struct jetsam_thread_state) * max_jetsam_threads);
+       jetsam_threads = zalloc_permanent(sizeof(struct jetsam_thread_state) *
+           max_jetsam_threads, ZALIGN(struct jetsam_thread_state));

 
        /* Initialize all the jetsam threads */
        for (i = 0; i < max_jetsam_threads; i++) {
 
        /* Initialize all the jetsam threads */
        for (i = 0; i < max_jetsam_threads; i++) {


@@ -1548,6 +1615,8 @@ memorystatus_init(void)
 /* Centralised for the purposes of allowing panic-on-jetsam */
 extern void
 vm_run_compactor(void);
 /* Centralised for the purposes of allowing panic-on-jetsam */
 extern void
 vm_run_compactor(void);

+extern void
+vm_wake_compactor_swapper(void);

 
 /*
  * The jetsam no frills kill call
 
 /*
  * The jetsam no frills kill call


@@ -1590,7 +1659,7 @@ memorystatus_do_kill(proc_t p, uint32_t cause, os_reason_t jetsam_reason, uint64
                printf("memorystatus: killing process %d [%s] in high band %s (%d) - memorystatus_available_pages: %llu\n", p->p_pid,
                    (*p->p_name ? p->p_name : "unknown"),
                    memorystatus_priority_band_name(p->p_memstat_effectivepriority), p->p_memstat_effectivepriority,
                printf("memorystatus: killing process %d [%s] in high band %s (%d) - memorystatus_available_pages: %llu\n", p->p_pid,
                    (*p->p_name ? p->p_name : "unknown"),
                    memorystatus_priority_band_name(p->p_memstat_effectivepriority), p->p_memstat_effectivepriority,

-                   (uint64_t)memorystatus_available_pages);
+                   (uint64_t)MEMORYSTATUS_LOG_AVAILABLE_PAGES);

        }
 
        /*
        }
 
        /*


@@ -1617,7 +1686,17 @@ memorystatus_do_kill(proc_t p, uint32_t cause, os_reason_t jetsam_reason, uint64
        KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_COMPACTOR_RUN)) | DBG_FUNC_START,
            victim_pid, cause, vm_page_free_count, *footprint_of_killed_proc, 0);
 
        KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_COMPACTOR_RUN)) | DBG_FUNC_START,
            victim_pid, cause, vm_page_free_count, *footprint_of_killed_proc, 0);
 

-       vm_run_compactor();
+       if (jetsam_reason->osr_code == JETSAM_REASON_VNODE) {
+               /*
+                * vnode jetsams are syncronous and not caused by memory pressure.
+                * Running the compactor on this thread adds significant latency to the filesystem operation
+                * that triggered this jetsam.
+                * Kick of compactor thread asyncronously instead.
+                */
+               vm_wake_compactor_swapper();
+       } else {
+               vm_run_compactor();
+       }

 
        KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_COMPACTOR_RUN)) | DBG_FUNC_END,
            victim_pid, cause, vm_page_free_count, 0, 0);
 
        KERNEL_DEBUG_CONSTANT((BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_COMPACTOR_RUN)) | DBG_FUNC_END,
            victim_pid, cause, vm_page_free_count, 0, 0);


@@ -1968,6 +2047,9 @@ memorystatus_add(proc_t p, boolean_t locked)
        if (isSysProc(p)) {
                p->p_memstat_state |= P_MEMSTAT_FREEZE_DISABLED;
        }
        if (isSysProc(p)) {
                p->p_memstat_state |= P_MEMSTAT_FREEZE_DISABLED;
        }

+#if CONFIG_FREEZE
+       memorystatus_freeze_init_proc(p);
+#endif

 
        bucket = &memstat_bucket[p->p_memstat_effectivepriority];
 
 
        bucket = &memstat_bucket[p->p_memstat_effectivepriority];
 


@@ -2632,6 +2714,12 @@ memorystatus_remove(proc_t p)
        }
 #endif
 
        }
 #endif
 

+#if DEVELOPMENT || DEBUG
+       if (p->p_pid == memorystatus_testing_pid) {
+               memorystatus_testing_pid = 0;
+       }
+#endif /* DEVELOPMENT || DEBUG */
+

        if (p) {
                ret = 0;
        } else {
        if (p) {
                ret = 0;
        } else {


@@ -2930,6 +3018,10 @@ memorystatus_dirty_set(proc_t p, boolean_t self, uint32_t pcontrol)
        boolean_t reschedule = FALSE;
        boolean_t was_dirty = FALSE;
        boolean_t now_dirty = FALSE;
        boolean_t reschedule = FALSE;
        boolean_t was_dirty = FALSE;
        boolean_t now_dirty = FALSE;

+#if CONFIG_DIRTYSTATUS_TRACKING
+       boolean_t notify_change = FALSE;
+       dirty_status_change_event_t change_event;
+#endif

 
        MEMORYSTATUS_DEBUG(1, "memorystatus_dirty_set(): %d %d 0x%x 0x%x\n", self, p->p_pid, pcontrol, p->p_memstat_dirty);
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_DIRTY_SET), p->p_pid, self, pcontrol, 0, 0);
 
        MEMORYSTATUS_DEBUG(1, "memorystatus_dirty_set(): %d %d 0x%x 0x%x\n", self, p->p_pid, pcontrol, p->p_memstat_dirty);
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_DIRTY_SET), p->p_pid, self, pcontrol, 0, 0);


@@ -2997,6 +3089,20 @@ memorystatus_dirty_set(proc_t p, boolean_t self, uint32_t pcontrol)
 
        if ((was_dirty == TRUE && now_dirty == FALSE) ||
            (was_dirty == FALSE && now_dirty == TRUE)) {
 
        if ((was_dirty == TRUE && now_dirty == FALSE) ||
            (was_dirty == FALSE && now_dirty == TRUE)) {

+#if CONFIG_DIRTYSTATUS_TRACKING
+               if (dirtystatus_tracking_enabled) {
+                       uint32_t pages = 0;
+                       memorystatus_get_task_page_counts(p->task, &pages, NULL, NULL);
+                       change_event.dsc_pid = p->p_pid;
+                       change_event.dsc_event_type = (now_dirty == TRUE) ? kDirtyStatusChangedDirty : kDirtyStatusChangedClean;
+                       change_event.dsc_time =  mach_absolute_time();
+                       change_event.dsc_pages = pages;
+                       change_event.dsc_priority = p->p_memstat_effectivepriority;
+                       strlcpy(&change_event.dsc_process_name[0], p->p_name, sizeof(change_event.dsc_process_name));
+                       notify_change = TRUE;
+               }
+#endif
+

                /* Manage idle exit deferral, if applied */
                if ((p->p_memstat_dirty & P_DIRTY_IDLE_EXIT_ENABLED) == P_DIRTY_IDLE_EXIT_ENABLED) {
                        /*
                /* Manage idle exit deferral, if applied */
                if ((p->p_memstat_dirty & P_DIRTY_IDLE_EXIT_ENABLED) == P_DIRTY_IDLE_EXIT_ENABLED) {
                        /*


@@ -3150,6 +3256,13 @@ memorystatus_dirty_set(proc_t p, boolean_t self, uint32_t pcontrol)
 exit:
        proc_list_unlock();
 
 exit:
        proc_list_unlock();
 

+#if CONFIG_DIRTYSTATUS_TRACKING
+       // Before returning, let's notify the dirtiness status if we have to
+       if (notify_change) {
+               memorystatus_send_dirty_status_change_note(&change_event, sizeof(change_event));
+       }
+#endif
+

        return ret;
 }
 
        return ret;
 }
 


@@ -3252,8 +3365,21 @@ memorystatus_on_terminate(proc_t p)
 
        p->p_memstat_dirty |= P_DIRTY_TERMINATED;
 
 
        p->p_memstat_dirty |= P_DIRTY_TERMINATED;
 

-       if ((p->p_memstat_dirty & (P_DIRTY_TRACK | P_DIRTY_IS_DIRTY)) == P_DIRTY_TRACK) {
-               /* Clean; mark as terminated and issue SIGKILL */
+       if (((p->p_memstat_dirty & (P_DIRTY_TRACK | P_DIRTY_IS_DIRTY)) == P_DIRTY_TRACK) ||
+           (p->p_memstat_state & P_MEMSTAT_SUSPENDED)) {
+               /*
+                * Mark as terminated and issue SIGKILL if:-
+                * - process is clean, or,
+                * - if process is dirty but suspended. This case is likely
+                * an extension because apps don't opt into dirty-tracking
+                * and daemons aren't suspended.
+                */
+#if DEVELOPMENT || DEBUG
+               if (p->p_memstat_state & P_MEMSTAT_SUSPENDED) {
+                       os_log(OS_LOG_DEFAULT, "memorystatus: sending suspended process %s (pid %d) SIGKILL",
+                           (*p->p_name ? p->p_name : "unknown"), p->p_pid);
+               }
+#endif /* DEVELOPMENT || DEBUG */

                sig = SIGKILL;
        } else {
                /* Dirty, terminated, or state tracking is unsupported; issue SIGTERM to allow cleanup */
                sig = SIGKILL;
        } else {
                /* Dirty, terminated, or state tracking is unsupported; issue SIGTERM to allow cleanup */


@@ -3280,6 +3406,8 @@ memorystatus_on_suspend(proc_t p)
        proc_list_unlock();
 }
 
        proc_list_unlock();
 }
 

+extern uint64_t memorystatus_thaw_count_since_boot;
+

 void
 memorystatus_on_resume(proc_t p)
 {
 void
 memorystatus_on_resume(proc_t p)
 {


@@ -3308,9 +3436,14 @@ memorystatus_on_resume(proc_t p)
                        p->p_memstat_state |= P_MEMSTAT_REFREEZE_ELIGIBLE;
                        memorystatus_refreeze_eligible_count++;
                }
                        p->p_memstat_state |= P_MEMSTAT_REFREEZE_ELIGIBLE;
                        memorystatus_refreeze_eligible_count++;
                }

+               if (p->p_memstat_thaw_count == 0 || p->p_memstat_last_thaw_interval < memorystatus_freeze_current_interval) {
+                       os_atomic_inc(&(memorystatus_freezer_stats.mfs_processes_thawed), relaxed);
+               }
+               p->p_memstat_last_thaw_interval = memorystatus_freeze_current_interval;

                p->p_memstat_thaw_count++;
 
                memorystatus_thaw_count++;
                p->p_memstat_thaw_count++;
 
                memorystatus_thaw_count++;

+               memorystatus_thaw_count_since_boot++;

        }
 
        memorystatus_suspended_count--;
        }
 
        memorystatus_suspended_count--;


@@ -3483,26 +3616,21 @@ memorystatus_thread_block(uint32_t interval_ms, thread_continue_t continuation)
 static boolean_t
 memorystatus_avail_pages_below_pressure(void)
 {
 static boolean_t
 memorystatus_avail_pages_below_pressure(void)
 {

-#if CONFIG_EMBEDDED
-/*
- * Instead of CONFIG_EMBEDDED for these *avail_pages* routines, we should
- * key off of the system having dynamic swap support. With full swap support,
- * the system shouldn't really need to worry about various page thresholds.
- */
+#if CONFIG_JETSAM

        return memorystatus_available_pages <= memorystatus_available_pages_pressure;
        return memorystatus_available_pages <= memorystatus_available_pages_pressure;

-#else /* CONFIG_EMBEDDED */
+#else /* CONFIG_JETSAM */

        return FALSE;
        return FALSE;

-#endif /* CONFIG_EMBEDDED */
+#endif /* CONFIG_JETSAM */

 }
 
 static boolean_t
 memorystatus_avail_pages_below_critical(void)
 {
 }
 
 static boolean_t
 memorystatus_avail_pages_below_critical(void)
 {

-#if CONFIG_EMBEDDED
+#if CONFIG_JETSAM

        return memorystatus_available_pages <= memorystatus_available_pages_critical;
        return memorystatus_available_pages <= memorystatus_available_pages_critical;

-#else /* CONFIG_EMBEDDED */
+#else /* CONFIG_JETSAM */

        return FALSE;
        return FALSE;

-#endif /* CONFIG_EMBEDDED */
+#endif /* CONFIG_JETSAM */

 }
 
 static boolean_t
 }
 
 static boolean_t


@@ -3515,7 +3643,7 @@ memorystatus_post_snapshot(int32_t priority, uint32_t cause)
        } else {
                is_idle_priority = (priority == JETSAM_PRIORITY_IDLE || priority == JETSAM_PRIORITY_IDLE_DEFERRED);
        }
        } else {
                is_idle_priority = (priority == JETSAM_PRIORITY_IDLE || priority == JETSAM_PRIORITY_IDLE_DEFERRED);
        }

-#if CONFIG_EMBEDDED
+#if CONFIG_JETSAM

 #pragma unused(cause)
        /*
         * Don't generate logs for steady-state idle-exit kills,
 #pragma unused(cause)
        /*
         * Don't generate logs for steady-state idle-exit kills,


@@ -3525,7 +3653,7 @@ memorystatus_post_snapshot(int32_t priority, uint32_t cause)
 
        return !is_idle_priority || memorystatus_idle_snapshot;
 
 
        return !is_idle_priority || memorystatus_idle_snapshot;
 

-#else /* CONFIG_EMBEDDED */
+#else /* CONFIG_JETSAM */

        /*
         * Don't generate logs for steady-state idle-exit kills,
         * unless
        /*
         * Don't generate logs for steady-state idle-exit kills,
         * unless


@@ -3537,20 +3665,20 @@ memorystatus_post_snapshot(int32_t priority, uint32_t cause)
 
        boolean_t snapshot_eligible_kill_cause = (is_reason_thrashing(cause) || is_reason_zone_map_exhaustion(cause));
        return !is_idle_priority || memorystatus_idle_snapshot || snapshot_eligible_kill_cause;
 
        boolean_t snapshot_eligible_kill_cause = (is_reason_thrashing(cause) || is_reason_zone_map_exhaustion(cause));
        return !is_idle_priority || memorystatus_idle_snapshot || snapshot_eligible_kill_cause;

-#endif /* CONFIG_EMBEDDED */
+#endif /* CONFIG_JETSAM */

 }
 
 static boolean_t
 memorystatus_action_needed(void)
 {
 }
 
 static boolean_t
 memorystatus_action_needed(void)
 {

-#if CONFIG_EMBEDDED
+#if CONFIG_JETSAM

        return is_reason_thrashing(kill_under_pressure_cause) ||
               is_reason_zone_map_exhaustion(kill_under_pressure_cause) ||
               memorystatus_available_pages <= memorystatus_available_pages_pressure;
        return is_reason_thrashing(kill_under_pressure_cause) ||
               is_reason_zone_map_exhaustion(kill_under_pressure_cause) ||
               memorystatus_available_pages <= memorystatus_available_pages_pressure;

-#else /* CONFIG_EMBEDDED */
+#else /* CONFIG_JETSAM */

        return is_reason_thrashing(kill_under_pressure_cause) ||
               is_reason_zone_map_exhaustion(kill_under_pressure_cause);
        return is_reason_thrashing(kill_under_pressure_cause) ||
               is_reason_zone_map_exhaustion(kill_under_pressure_cause);

-#endif /* CONFIG_EMBEDDED */
+#endif /* CONFIG_JETSAM */

 }
 
 static boolean_t
 }
 
 static boolean_t


@@ -3651,11 +3779,28 @@ memorystatus_aggressive_jetsam_needed_sysproc_aging(__unused int jld_eval_aggres
 #if DEVELOPMENT || DEBUG
        printf("memorystatus: aggressive%d: [%s] Bad Candidate Threshold Check (total: %d, bad: %d, threshold: %d %%); Memory Pressure Check (available_pgs: %llu, threshold_pgs: %llu)\n",
            jld_eval_aggressive_count, aggressive_jetsam_needed ? "PASSED" : "FAILED", *total_candidates, bad_candidates,
 #if DEVELOPMENT || DEBUG
        printf("memorystatus: aggressive%d: [%s] Bad Candidate Threshold Check (total: %d, bad: %d, threshold: %d %%); Memory Pressure Check (available_pgs: %llu, threshold_pgs: %llu)\n",
            jld_eval_aggressive_count, aggressive_jetsam_needed ? "PASSED" : "FAILED", *total_candidates, bad_candidates,

-           kJetsamHighRelaunchCandidatesThreshold, (uint64_t)memorystatus_available_pages, (uint64_t)memorystatus_sysproc_aging_aggr_pages);
+           kJetsamHighRelaunchCandidatesThreshold, (uint64_t)MEMORYSTATUS_LOG_AVAILABLE_PAGES, (uint64_t)memorystatus_sysproc_aging_aggr_pages);

 #endif /* DEVELOPMENT || DEBUG */
        return aggressive_jetsam_needed;
 }
 
 #endif /* DEVELOPMENT || DEBUG */
        return aggressive_jetsam_needed;
 }
 

+/*
+ * Gets memory back from various system caches.
+ * Called before jetsamming in the foreground band in the hope that we'll
+ * avoid a jetsam.
+ */
+static void
+memorystatus_approaching_fg_band(boolean_t *corpse_list_purged)
+{
+       assert(corpse_list_purged != NULL);
+       pmap_release_pages_fast();
+       memorystatus_issue_fg_band_notify();
+       if (total_corpses_count() > 0 && !*corpse_list_purged) {
+               task_purge_all_corpses();
+               *corpse_list_purged = TRUE;
+       }
+}
+

 static boolean_t
 memorystatus_aggressive_jetsam_needed_default(__unused int jld_eval_aggressive_count, int *jld_idle_kills, int jld_idle_kill_candidates, int *total_candidates, int *elevated_bucket_count)
 {
 static boolean_t
 memorystatus_aggressive_jetsam_needed_default(__unused int jld_eval_aggressive_count, int *jld_idle_kills, int jld_idle_kill_candidates, int *total_candidates, int *elevated_bucket_count)
 {


@@ -3807,17 +3952,7 @@ memorystatus_act_aggressive(uint32_t cause, os_reason_t jetsam_reason, int *jld_
        jld_eval_aggressive_count++;
 
        if (jld_eval_aggressive_count == memorystatus_jld_eval_aggressive_count) {
        jld_eval_aggressive_count++;
 
        if (jld_eval_aggressive_count == memorystatus_jld_eval_aggressive_count) {

-               memorystatus_issue_fg_band_notify();
-
-               /*
-                * If we reach this aggressive cycle, corpses might be causing memory pressure.
-                * So, in an effort to avoid jetsams in the FG band, we will attempt to purge
-                * corpse memory prior to this final march through JETSAM_PRIORITY_UI_SUPPORT.
-                */
-               if (total_corpses_count() > 0 && !*corpse_list_purged) {
-                       task_purge_all_corpses();
-                       *corpse_list_purged = TRUE;
-               }
+               memorystatus_approaching_fg_band(corpse_list_purged);

        } else if (jld_eval_aggressive_count > memorystatus_jld_eval_aggressive_count) {
                /*
                 * Bump up the jetsam priority limit (eg: the bucket index)
        } else if (jld_eval_aggressive_count > memorystatus_jld_eval_aggressive_count) {
                /*
                 * Bump up the jetsam priority limit (eg: the bucket index)


@@ -3926,13 +4061,16 @@ memorystatus_thread(void *param __unused, wait_result_t wr __unused)
                } else {
                        jetsam_thread->limit_to_low_bands = TRUE;
                }
                } else {
                        jetsam_thread->limit_to_low_bands = TRUE;
                }

+#if CONFIG_THREAD_GROUPS
+               thread_group_vm_add();
+#endif

                thread_set_thread_name(current_thread(), name);
                jetsam_thread->inited = TRUE;
                memorystatus_thread_block(0, memorystatus_thread);
        }
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_SCAN) | DBG_FUNC_START,
                thread_set_thread_name(current_thread(), name);
                jetsam_thread->inited = TRUE;
                memorystatus_thread_block(0, memorystatus_thread);
        }
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_SCAN) | DBG_FUNC_START,

-           memorystatus_available_pages, memorystatus_jld_enabled, memorystatus_jld_eval_period_msecs, memorystatus_jld_eval_aggressive_count, 0);
+           MEMORYSTATUS_LOG_AVAILABLE_PAGES, memorystatus_jld_enabled, memorystatus_jld_eval_period_msecs, memorystatus_jld_eval_aggressive_count, 0);

 
        /*
         * Jetsam aware version.
 
        /*
         * Jetsam aware version.


@@ -4037,11 +4175,7 @@ memorystatus_thread(void *param __unused, wait_result_t wr __unused)
                         * anybody wanting to know this.
                         */
                        if (priority >= JETSAM_PRIORITY_UI_SUPPORT) {
                         * anybody wanting to know this.
                         */
                        if (priority >= JETSAM_PRIORITY_UI_SUPPORT) {

-                               memorystatus_issue_fg_band_notify();
-                               if (total_corpses_count() > 0 && !corpse_list_purged) {
-                                       task_purge_all_corpses();
-                                       corpse_list_purged = TRUE;
-                               }
+                               memorystatus_approaching_fg_band(&corpse_list_purged);

                        }
                        goto done;
                }
                        }
                        goto done;
                }


@@ -4049,7 +4183,9 @@ memorystatus_thread(void *param __unused, wait_result_t wr __unused)
                if (memorystatus_avail_pages_below_critical()) {
                        /*
                         * Still under pressure and unable to kill a process - purge corpse memory
                if (memorystatus_avail_pages_below_critical()) {
                        /*
                         * Still under pressure and unable to kill a process - purge corpse memory

+                        * and get everything back from the pmap.

                         */
                         */

+                       pmap_release_pages_fast();

                        if (total_corpses_count() > 0) {
                                task_purge_all_corpses();
                                corpse_list_purged = TRUE;
                        if (total_corpses_count() > 0) {
                                task_purge_all_corpses();
                                corpse_list_purged = TRUE;


@@ -4059,7 +4195,7 @@ memorystatus_thread(void *param __unused, wait_result_t wr __unused)
                                /*
                                 * Still under pressure and unable to kill a process - panic
                                 */
                                /*
                                 * Still under pressure and unable to kill a process - panic
                                 */

-                               panic("memorystatus_jetsam_thread: no victim! available pages:%llu\n", (uint64_t)memorystatus_available_pages);
+                               panic("memorystatus_jetsam_thread: no victim! available pages:%llu\n", (uint64_t)MEMORYSTATUS_LOG_AVAILABLE_PAGES);

                        }
                }
 
                        }
                }
 


@@ -4110,7 +4246,7 @@ done:
        }
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_SCAN) | DBG_FUNC_END,
        }
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_SCAN) | DBG_FUNC_END,

-           memorystatus_available_pages, total_memory_reclaimed, 0, 0, 0);
+           MEMORYSTATUS_LOG_AVAILABLE_PAGES, total_memory_reclaimed, 0, 0, 0);

 
        memorystatus_thread_block(0, memorystatus_thread);
 }
 
        memorystatus_thread_block(0, memorystatus_thread);
 }


@@ -4159,7 +4295,7 @@ memorystatus_on_ledger_footprint_exceeded(boolean_t warning, boolean_t memlimit_
                 * This is a warning path which implies that the current process is close, but has
                 * not yet exceeded its per-process memory limit.
                 */
                 * This is a warning path which implies that the current process is close, but has
                 * not yet exceeded its per-process memory limit.
                 */

-               if (memorystatus_warn_process(p->p_pid, memlimit_is_active, memlimit_is_fatal, FALSE /* not exceeded */) != TRUE) {
+               if (memorystatus_warn_process(p, memlimit_is_active, memlimit_is_fatal, FALSE /* not exceeded */) != TRUE) {

                        /* Print warning, since it's possible that task has not registered for pressure notifications */
                        os_log(OS_LOG_DEFAULT, "memorystatus_on_ledger_footprint_exceeded: failed to warn the current task (%d exiting, or no handler registered?).\n", p->p_pid);
                }
                        /* Print warning, since it's possible that task has not registered for pressure notifications */
                        os_log(OS_LOG_DEFAULT, "memorystatus_on_ledger_footprint_exceeded: failed to warn the current task (%d exiting, or no handler registered?).\n", p->p_pid);
                }


@@ -4196,7 +4332,7 @@ memorystatus_on_ledger_footprint_exceeded(boolean_t warning, boolean_t memlimit_
                 * This path implies the current process has exceeded a non-fatal (soft) memory limit.
                 * Failure to send note is ignored here.
                 */
                 * This path implies the current process has exceeded a non-fatal (soft) memory limit.
                 * Failure to send note is ignored here.
                 */

-               (void)memorystatus_warn_process(p->p_pid, memlimit_is_active, memlimit_is_fatal, TRUE /* exceeded */);
+               (void)memorystatus_warn_process(p, memlimit_is_active, memlimit_is_fatal, TRUE /* exceeded */);

 
 #endif /* VM_PRESSURE_EVENTS */
        }
 
 #endif /* VM_PRESSURE_EVENTS */
        }


@@ -4373,7 +4509,7 @@ memorystatus_kill_specific_process(pid_t victim_pid, uint32_t cause, os_reason_t
        os_log_with_startup_serial(OS_LOG_DEFAULT, "%lu.%03d memorystatus: killing_specific_process pid %d [%s] (%s %d) %lluKB - memorystatus_available_pages: %llu\n",
            (unsigned long)tv_sec, tv_msec, victim_pid, ((p && *p->p_name) ? p->p_name : "unknown"),
            memorystatus_kill_cause_name[cause], (p ? p->p_memstat_effectivepriority: -1),
        os_log_with_startup_serial(OS_LOG_DEFAULT, "%lu.%03d memorystatus: killing_specific_process pid %d [%s] (%s %d) %lluKB - memorystatus_available_pages: %llu\n",
            (unsigned long)tv_sec, tv_msec, victim_pid, ((p && *p->p_name) ? p->p_name : "unknown"),
            memorystatus_kill_cause_name[cause], (p ? p->p_memstat_effectivepriority: -1),

-           footprint_of_killed_proc >> 10, (uint64_t)memorystatus_available_pages);
+           footprint_of_killed_proc >> 10, (uint64_t)MEMORYSTATUS_LOG_AVAILABLE_PAGES);

 
        proc_rele(p);
 
 
        proc_rele(p);
 


@@ -4552,11 +4688,9 @@ set_vm_map_fork_pidwatch(task_t task, uint64_t x)
  * By default, a vm_map_fork is allowed to proceed.
  *
  * A few simple policy assumptions:
  * By default, a vm_map_fork is allowed to proceed.
  *
  * A few simple policy assumptions:

- *     Desktop platform is not considered in this path.
- *     The vm_map_fork is always allowed.
- *

  *     If the device has a zero system-wide task limit,
  *     If the device has a zero system-wide task limit,

- *     then the vm_map_fork is allowed.
+ *     then the vm_map_fork is allowed. macOS always has a zero
+ *     system wide task limit (unless overriden by a boot-arg).

  *
  *     And if a process's memory footprint calculates less
  *     than or equal to quarter of the system-wide task limit,
  *
  *     And if a process's memory footprint calculates less
  *     than or equal to quarter of the system-wide task limit,


@@ -4570,8 +4704,6 @@ memorystatus_allowed_vm_map_fork(task_t task)
 {
        boolean_t is_allowed = TRUE;   /* default */
 
 {
        boolean_t is_allowed = TRUE;   /* default */
 

-#if CONFIG_EMBEDDED
-

        uint64_t footprint_in_bytes;
        uint64_t max_allowed_bytes;
 
        uint64_t footprint_in_bytes;
        uint64_t max_allowed_bytes;
 


@@ -4598,7 +4730,6 @@ memorystatus_allowed_vm_map_fork(task_t task)
                set_vm_map_fork_pidwatch(task, MEMORYSTATUS_VM_MAP_FORK_NOT_ALLOWED);
                return !is_allowed;
        }
                set_vm_map_fork_pidwatch(task, MEMORYSTATUS_VM_MAP_FORK_NOT_ALLOWED);
                return !is_allowed;
        }

-#endif /* CONFIG_EMBEDDED */

 
        set_vm_map_fork_pidwatch(task, MEMORYSTATUS_VM_MAP_FORK_ALLOWED);
        return is_allowed;
 
        set_vm_map_fork_pidwatch(task, MEMORYSTATUS_VM_MAP_FORK_ALLOWED);
        return is_allowed;


@@ -4633,7 +4764,7 @@ memorystatus_get_task_phys_footprint_page_counts(task_t task,
     uint64_t *internal_pages, uint64_t *internal_compressed_pages,
     uint64_t *purgeable_nonvolatile_pages, uint64_t *purgeable_nonvolatile_compressed_pages,
     uint64_t *alternate_accounting_pages, uint64_t *alternate_accounting_compressed_pages,
     uint64_t *internal_pages, uint64_t *internal_compressed_pages,
     uint64_t *purgeable_nonvolatile_pages, uint64_t *purgeable_nonvolatile_compressed_pages,
     uint64_t *alternate_accounting_pages, uint64_t *alternate_accounting_compressed_pages,

-    uint64_t *iokit_mapped_pages, uint64_t *page_table_pages)
+    uint64_t *iokit_mapped_pages, uint64_t *page_table_pages, uint64_t *frozen_to_swap_pages)

 {
        assert(task);
 
 {
        assert(task);
 


@@ -4668,6 +4799,57 @@ memorystatus_get_task_phys_footprint_page_counts(task_t task,
        if (page_table_pages) {
                *page_table_pages = (get_task_page_table(task) / PAGE_SIZE_64);
        }
        if (page_table_pages) {
                *page_table_pages = (get_task_page_table(task) / PAGE_SIZE_64);
        }

+
+#if CONFIG_FREEZE
+       if (frozen_to_swap_pages) {
+               *frozen_to_swap_pages = (get_task_frozen_to_swap(task) / PAGE_SIZE_64);
+       }
+#else /* CONFIG_FREEZE */
+#pragma unused(frozen_to_swap_pages)
+#endif /* CONFIG_FREEZE */
+}
+
+#if CONFIG_FREEZE
+/*
+ * Copies the source entry into the destination snapshot.
+ * Returns true on success. Fails if the destination snapshot is full.
+ * Caller must hold the proc list lock.
+ */
+static bool
+memorystatus_jetsam_snapshot_copy_entry_locked(memorystatus_jetsam_snapshot_t *dst_snapshot, unsigned int dst_snapshot_size, const memorystatus_jetsam_snapshot_entry_t *src_entry)
+{
+       LCK_MTX_ASSERT(&proc_list_mlock, LCK_MTX_ASSERT_OWNED);
+       assert(dst_snapshot);
+
+       if (dst_snapshot->entry_count == dst_snapshot_size) {
+               /* Destination snapshot is full. Can not be updated until it is consumed. */
+               return false;
+       }
+       if (dst_snapshot->entry_count == 0) {
+               memorystatus_init_jetsam_snapshot_header(dst_snapshot);
+       }
+       memorystatus_jetsam_snapshot_entry_t *dst_entry = &dst_snapshot->entries[dst_snapshot->entry_count++];
+       memcpy(dst_entry, src_entry, sizeof(memorystatus_jetsam_snapshot_entry_t));
+       return true;
+}
+#endif /* CONFIG_FREEZE */
+
+static bool
+memorystatus_init_jetsam_snapshot_entry_with_kill_locked(memorystatus_jetsam_snapshot_t *snapshot, proc_t p, uint32_t kill_cause, uint64_t killtime, memorystatus_jetsam_snapshot_entry_t **entry)
+{
+       LCK_MTX_ASSERT(&proc_list_mlock, LCK_MTX_ASSERT_OWNED);
+       memorystatus_jetsam_snapshot_entry_t *snapshot_list = snapshot->entries;
+       size_t i = snapshot->entry_count;
+
+       if (memorystatus_init_jetsam_snapshot_entry_locked(p, &snapshot_list[i], (snapshot->js_gencount)) == TRUE) {
+               *entry = &snapshot_list[i];
+               (*entry)->killed       = kill_cause;
+               (*entry)->jse_killtime = killtime;
+
+               snapshot->entry_count = i + 1;
+               return true;
+       }
+       return false;

 }
 
 /*
 }
 
 /*


@@ -4683,15 +4865,18 @@ memorystatus_update_jetsam_snapshot_entry_locked(proc_t p, uint32_t kill_cause,
        memorystatus_jetsam_snapshot_entry_t *snapshot_list = NULL;
 
        unsigned int i;
        memorystatus_jetsam_snapshot_entry_t *snapshot_list = NULL;
 
        unsigned int i;

+#if CONFIG_FREEZE
+       bool copied_to_freezer_snapshot = false;
+#endif /* CONFIG_FREEZE */

 
 

-       LCK_MTX_ASSERT(proc_list_mlock, LCK_MTX_ASSERT_OWNED);
+       LCK_MTX_ASSERT(&proc_list_mlock, LCK_MTX_ASSERT_OWNED);

 
        if (memorystatus_jetsam_snapshot_count == 0) {
                /*
                 * No active snapshot.
                 * Nothing to do.
                 */
 
        if (memorystatus_jetsam_snapshot_count == 0) {
                /*
                 * No active snapshot.
                 * Nothing to do.
                 */

-               return;
+               goto exit;

        }
 
        /*
        }
 
        /*


@@ -4727,8 +4912,10 @@ memorystatus_update_jetsam_snapshot_entry_locked(proc_t p, uint32_t kill_cause,
                        entry->jse_idle_delta = p->p_memstat_idle_delta;
 #if CONFIG_FREEZE
                        entry->jse_thaw_count = p->p_memstat_thaw_count;
                        entry->jse_idle_delta = p->p_memstat_idle_delta;
 #if CONFIG_FREEZE
                        entry->jse_thaw_count = p->p_memstat_thaw_count;

+                       entry->jse_freeze_skip_reason = p->p_memstat_freeze_skip_reason;

 #else /* CONFIG_FREEZE */
                        entry->jse_thaw_count = 0;
 #else /* CONFIG_FREEZE */
                        entry->jse_thaw_count = 0;

+                       entry->jse_freeze_skip_reason = kMemorystatusFreezeSkipReasonNone;

 #endif /* CONFIG_FREEZE */
 
                        /*
 #endif /* CONFIG_FREEZE */
 
                        /*


@@ -4764,11 +4951,12 @@ memorystatus_update_jetsam_snapshot_entry_locked(proc_t p, uint32_t kill_cause,
                        uint64_t alternate_accounting_compressed_pages = 0;
                        uint64_t iokit_mapped_pages                    = 0;
                        uint64_t page_table_pages                      = 0;
                        uint64_t alternate_accounting_compressed_pages = 0;
                        uint64_t iokit_mapped_pages                    = 0;
                        uint64_t page_table_pages                      = 0;

+                       uint64_t frozen_to_swap_pages                  = 0;

 
                        memorystatus_get_task_phys_footprint_page_counts(p->task, &internal_pages, &internal_compressed_pages,
                            &purgeable_nonvolatile_pages, &purgeable_nonvolatile_compressed_pages,
                            &alternate_accounting_pages, &alternate_accounting_compressed_pages,
 
                        memorystatus_get_task_phys_footprint_page_counts(p->task, &internal_pages, &internal_compressed_pages,
                            &purgeable_nonvolatile_pages, &purgeable_nonvolatile_compressed_pages,
                            &alternate_accounting_pages, &alternate_accounting_compressed_pages,

-                           &iokit_mapped_pages, &page_table_pages);
+                           &iokit_mapped_pages, &page_table_pages, &frozen_to_swap_pages);

 
                        entry->jse_internal_pages = internal_pages;
                        entry->jse_internal_compressed_pages = internal_compressed_pages;
 
                        entry->jse_internal_pages = internal_pages;
                        entry->jse_internal_compressed_pages = internal_compressed_pages;


@@ -4778,6 +4966,7 @@ memorystatus_update_jetsam_snapshot_entry_locked(proc_t p, uint32_t kill_cause,
                        entry->jse_alternate_accounting_compressed_pages = alternate_accounting_compressed_pages;
                        entry->jse_iokit_mapped_pages = iokit_mapped_pages;
                        entry->jse_page_table_pages = page_table_pages;
                        entry->jse_alternate_accounting_compressed_pages = alternate_accounting_compressed_pages;
                        entry->jse_iokit_mapped_pages = iokit_mapped_pages;
                        entry->jse_page_table_pages = page_table_pages;

+                       entry->jse_frozen_to_swap_pages = frozen_to_swap_pages;

 
                        uint64_t region_count = 0;
                        memorystatus_get_task_memory_region_count(p->task, &region_count);
 
                        uint64_t region_count = 0;
                        memorystatus_get_task_memory_region_count(p->task, &region_count);


@@ -4800,15 +4989,8 @@ memorystatus_update_jetsam_snapshot_entry_locked(proc_t p, uint32_t kill_cause,
                         */
                        assert(memorystatus_jetsam_snapshot_count == snapshot->entry_count);
 
                         */
                        assert(memorystatus_jetsam_snapshot_count == snapshot->entry_count);
 

-                       unsigned int next = memorystatus_jetsam_snapshot_count;
-
-                       if (memorystatus_init_jetsam_snapshot_entry_locked(p, &snapshot_list[next], (snapshot->js_gencount)) == TRUE) {
-                               entry = &snapshot_list[next];
-                               entry->killed       = kill_cause;
-                               entry->jse_killtime = killtime;
-
-                               snapshot->entry_count = ++next;
-                               memorystatus_jetsam_snapshot_count = next;
+                       if (memorystatus_init_jetsam_snapshot_entry_with_kill_locked(snapshot, p, kill_cause, killtime, &entry)) {
+                               memorystatus_jetsam_snapshot_count++;

 
                                if (memorystatus_jetsam_snapshot_count >= memorystatus_jetsam_snapshot_max) {
                                        /*
 
                                if (memorystatus_jetsam_snapshot_count >= memorystatus_jetsam_snapshot_max) {
                                        /*


@@ -4824,7 +5006,23 @@ memorystatus_update_jetsam_snapshot_entry_locked(proc_t p, uint32_t kill_cause,
        }
 
 exit:
        }
 
 exit:

-       if (entry == NULL) {
+       if (entry) {
+#if CONFIG_FREEZE
+               if (memorystatus_jetsam_use_freezer_snapshot && isApp(p)) {
+                       /* This is an app kill. Record it in the freezer snapshot so dasd can incorporate this in its recommendations. */
+                       copied_to_freezer_snapshot = memorystatus_jetsam_snapshot_copy_entry_locked(memorystatus_jetsam_snapshot_freezer, memorystatus_jetsam_snapshot_freezer_max, entry);
+                       if (copied_to_freezer_snapshot && memorystatus_jetsam_snapshot_freezer->entry_count == memorystatus_jetsam_snapshot_freezer_max) {
+                               /*
+                                * We just used the last slot in the freezer snapshot buffer.
+                                * We only want to log it once... so we do it here
+                                * when we notice we've hit the max.
+                                */
+                               os_log_error(OS_LOG_DEFAULT, "memorystatus: WARNING freezer snapshot buffer is full, count %zu",
+                                   memorystatus_jetsam_snapshot_freezer->entry_count);
+                       }
+               }
+#endif /* CONFIG_FREEZE */
+       } else {

                /*
                 * If we reach here, the snapshot buffer could not be updated.
                 * Most likely, the buffer is full, in which case we would have
                /*
                 * If we reach here, the snapshot buffer could not be updated.
                 * Most likely, the buffer is full, in which case we would have


@@ -4836,6 +5034,25 @@ exit:
 
                MEMORYSTATUS_DEBUG(4, "memorystatus_update_jetsam_snapshot_entry_locked: failed to update pid %d, priority %d, count %d\n",
                    p->p_pid, p->p_memstat_effectivepriority, memorystatus_jetsam_snapshot_count);
 
                MEMORYSTATUS_DEBUG(4, "memorystatus_update_jetsam_snapshot_entry_locked: failed to update pid %d, priority %d, count %d\n",
                    p->p_pid, p->p_memstat_effectivepriority, memorystatus_jetsam_snapshot_count);

+
+#if CONFIG_FREEZE
+               /* We still attempt to record this in the freezer snapshot */
+               if (memorystatus_jetsam_use_freezer_snapshot && isApp(p)) {
+                       snapshot = memorystatus_jetsam_snapshot_freezer;
+                       if (snapshot->entry_count < memorystatus_jetsam_snapshot_freezer_max) {
+                               copied_to_freezer_snapshot = memorystatus_init_jetsam_snapshot_entry_with_kill_locked(snapshot, p, kill_cause, killtime, &entry);
+                               if (copied_to_freezer_snapshot && memorystatus_jetsam_snapshot_freezer->entry_count == memorystatus_jetsam_snapshot_freezer_max) {
+                                       /*
+                                        * We just used the last slot in the freezer snapshot buffer.
+                                        * We only want to log it once... so we do it here
+                                        * when we notice we've hit the max.
+                                        */
+                                       os_log_error(OS_LOG_DEFAULT, "memorystatus: WARNING freezer snapshot buffer is full, count %zu",
+                                           memorystatus_jetsam_snapshot_freezer->entry_count);
+                               }
+                       }
+               }
+#endif /* CONFIG_FREEZE */

        }
 
        return;
        }
 
        return;


@@ -4922,6 +5139,7 @@ memorystatus_init_jetsam_snapshot_entry_locked(proc_t p, memorystatus_jetsam_sna
        uint64_t alternate_accounting_compressed_pages  = 0;
        uint64_t iokit_mapped_pages                     = 0;
        uint64_t page_table_pages                       = 0;
        uint64_t alternate_accounting_compressed_pages  = 0;
        uint64_t iokit_mapped_pages                     = 0;
        uint64_t page_table_pages                       = 0;

+       uint64_t frozen_to_swap_pages                   = 0;

        uint64_t region_count                           = 0;
        uint64_t cids[COALITION_NUM_TYPES];
 
        uint64_t region_count                           = 0;
        uint64_t cids[COALITION_NUM_TYPES];
 


@@ -4939,7 +5157,7 @@ memorystatus_init_jetsam_snapshot_entry_locked(proc_t p, memorystatus_jetsam_sna
        memorystatus_get_task_phys_footprint_page_counts(p->task, &internal_pages, &internal_compressed_pages,
            &purgeable_nonvolatile_pages, &purgeable_nonvolatile_compressed_pages,
            &alternate_accounting_pages, &alternate_accounting_compressed_pages,
        memorystatus_get_task_phys_footprint_page_counts(p->task, &internal_pages, &internal_compressed_pages,
            &purgeable_nonvolatile_pages, &purgeable_nonvolatile_compressed_pages,
            &alternate_accounting_pages, &alternate_accounting_compressed_pages,

-           &iokit_mapped_pages, &page_table_pages);
+           &iokit_mapped_pages, &page_table_pages, &frozen_to_swap_pages);

 
        entry->jse_internal_pages = internal_pages;
        entry->jse_internal_compressed_pages = internal_compressed_pages;
 
        entry->jse_internal_pages = internal_pages;
        entry->jse_internal_compressed_pages = internal_compressed_pages;


@@ -4949,6 +5167,7 @@ memorystatus_init_jetsam_snapshot_entry_locked(proc_t p, memorystatus_jetsam_sna
        entry->jse_alternate_accounting_compressed_pages = alternate_accounting_compressed_pages;
        entry->jse_iokit_mapped_pages = iokit_mapped_pages;
        entry->jse_page_table_pages = page_table_pages;
        entry->jse_alternate_accounting_compressed_pages = alternate_accounting_compressed_pages;
        entry->jse_iokit_mapped_pages = iokit_mapped_pages;
        entry->jse_page_table_pages = page_table_pages;

+       entry->jse_frozen_to_swap_pages = frozen_to_swap_pages;

 
        memorystatus_get_task_memory_region_count(p->task, &region_count);
        entry->jse_memory_region_count = region_count;
 
        memorystatus_get_task_memory_region_count(p->task, &region_count);
        entry->jse_memory_region_count = region_count;


@@ -4971,9 +5190,11 @@ memorystatus_init_jetsam_snapshot_entry_locked(proc_t p, memorystatus_jetsam_sna
        entry->jse_idle_delta = p->p_memstat_idle_delta; /* Most recent timespan spent in idle-band */
 
 #if CONFIG_FREEZE
        entry->jse_idle_delta = p->p_memstat_idle_delta; /* Most recent timespan spent in idle-band */
 
 #if CONFIG_FREEZE

+       entry->jse_freeze_skip_reason = p->p_memstat_freeze_skip_reason;

        entry->jse_thaw_count = p->p_memstat_thaw_count;
 #else /* CONFIG_FREEZE */
        entry->jse_thaw_count = 0;
        entry->jse_thaw_count = p->p_memstat_thaw_count;
 #else /* CONFIG_FREEZE */
        entry->jse_thaw_count = 0;

+       entry->jse_freeze_skip_reason = kMemorystatusFreezeSkipReasonNone;

 #endif /* CONFIG_FREEZE */
 
        proc_coalitionids(p, cids);
 #endif /* CONFIG_FREEZE */
 
        proc_coalitionids(p, cids);


@@ -5030,6 +5251,15 @@ memorystatus_init_at_boot_snapshot()
        memorystatus_at_boot_snapshot.snapshot_time = mach_absolute_time();
 }
 
        memorystatus_at_boot_snapshot.snapshot_time = mach_absolute_time();
 }
 

+static void
+memorystatus_init_jetsam_snapshot_header(memorystatus_jetsam_snapshot_t *snapshot)
+{
+       memorystatus_init_snapshot_vmstats(snapshot);
+       snapshot->snapshot_time = mach_absolute_time();
+       snapshot->notification_time = 0;
+       snapshot->js_gencount = 0;
+}
+

 static void
 memorystatus_init_jetsam_snapshot_locked(memorystatus_jetsam_snapshot_t *od_snapshot, uint32_t ods_list_count )
 {
 static void
 memorystatus_init_jetsam_snapshot_locked(memorystatus_jetsam_snapshot_t *od_snapshot, uint32_t ods_list_count )
 {


@@ -5040,7 +5270,7 @@ memorystatus_init_jetsam_snapshot_locked(memorystatus_jetsam_snapshot_t *od_snap
        memorystatus_jetsam_snapshot_entry_t *snapshot_list = NULL;
        unsigned int snapshot_max = 0;
 
        memorystatus_jetsam_snapshot_entry_t *snapshot_list = NULL;
        unsigned int snapshot_max = 0;
 

-       LCK_MTX_ASSERT(proc_list_mlock, LCK_MTX_ASSERT_OWNED);
+       LCK_MTX_ASSERT(&proc_list_mlock, LCK_MTX_ASSERT_OWNED);

 
        if (od_snapshot) {
                /*
 
        if (od_snapshot) {
                /*


@@ -5058,13 +5288,7 @@ memorystatus_init_jetsam_snapshot_locked(memorystatus_jetsam_snapshot_t *od_snap
                snapshot_max  = memorystatus_jetsam_snapshot_max;
        }
 
                snapshot_max  = memorystatus_jetsam_snapshot_max;
        }
 

-       /*
-        * Init the snapshot header information
-        */
-       memorystatus_init_snapshot_vmstats(snapshot);
-       snapshot->snapshot_time = mach_absolute_time();
-       snapshot->notification_time = 0;
-       snapshot->js_gencount = 0;
+       memorystatus_init_jetsam_snapshot_header(snapshot);

 
        next_p = memorystatus_get_first_proc_locked(&b, TRUE);
        while (next_p) {
 
        next_p = memorystatus_get_first_proc_locked(&b, TRUE);
        while (next_p) {


@@ -5097,7 +5321,7 @@ memorystatus_init_jetsam_snapshot_locked(memorystatus_jetsam_snapshot_t *od_snap
 
 #if CONFIG_JETSAM
 static int
 
 #if CONFIG_JETSAM
 static int

-memorystatus_cmd_set_panic_bits(user_addr_t buffer, uint32_t buffer_size)
+memorystatus_cmd_set_panic_bits(user_addr_t buffer, size_t buffer_size)

 {
        int ret;
        memorystatus_jetsam_panic_options_t debug;
 {
        int ret;
        memorystatus_jetsam_panic_options_t debug;


@@ -5122,17 +5346,113 @@ memorystatus_cmd_set_panic_bits(user_addr_t buffer, uint32_t buffer_size)
 }
 #endif /* CONFIG_JETSAM */
 
 }
 #endif /* CONFIG_JETSAM */
 

+/*
+ * Verify that the given bucket has been sorted correctly.
+ *
+ * Walks through the bucket and verifies that all pids in the
+ * expected_order buffer are in that bucket and in the same
+ * relative order.
+ *
+ * The proc_list_lock must be held by the caller.
+ */
+static int
+memorystatus_verify_sort_order(unsigned int bucket_index, pid_t *expected_order, size_t num_pids)
+{
+       LCK_MTX_ASSERT(&proc_list_mlock, LCK_MTX_ASSERT_OWNED);
+
+       int error = 0;
+       proc_t p = NULL;
+       size_t i = 0;
+
+       /*
+        * NB: We allow other procs to be mixed in within the expected ones.
+        * We just need the expected procs to be in the right order relative to each other.
+        */
+       p = memorystatus_get_first_proc_locked(&bucket_index, FALSE);
+       while (p) {
+               if (p->p_pid == expected_order[i]) {
+                       i++;
+               }
+               if (i == num_pids) {
+                       break;
+               }
+               p = memorystatus_get_next_proc_locked(&bucket_index, p, FALSE);
+       }
+       if (i != num_pids) {
+               char buffer[128];
+               size_t len = sizeof(buffer);
+               size_t buffer_idx = 0;
+               os_log_error(OS_LOG_DEFAULT, "memorystatus_verify_sort_order: Processes in bucket %d were not sorted properly\n", bucket_index);
+               for (i = 0; i < num_pids; i++) {
+                       int num_written = snprintf(buffer + buffer_idx, len - buffer_idx, "%d,", expected_order[i]);
+                       if (num_written <= 0) {
+                               break;
+                       }
+                       if (buffer_idx + (unsigned int) num_written >= len) {
+                               break;
+                       }
+                       buffer_idx += num_written;
+               }
+               os_log_error(OS_LOG_DEFAULT, "memorystatus_verify_sort_order: Expected order [%s]", buffer);
+               memset(buffer, 0, len);
+               buffer_idx = 0;
+               p = memorystatus_get_first_proc_locked(&bucket_index, FALSE);
+               i = 0;
+               os_log_error(OS_LOG_DEFAULT, "memorystatus_verify_sort_order: Actual order:");
+               while (p) {
+                       int num_written;
+                       if (buffer_idx == 0) {
+                               num_written = snprintf(buffer + buffer_idx, len - buffer_idx, "%zu: %d,", i, p->p_pid);
+                       } else {
+                               num_written = snprintf(buffer + buffer_idx, len - buffer_idx, "%d,", p->p_pid);
+                       }
+                       if (num_written <= 0) {
+                               break;
+                       }
+                       buffer_idx += (unsigned int) num_written;
+                       assert(buffer_idx <= len);
+                       if (i % 10 == 0) {
+                               os_log_error(OS_LOG_DEFAULT, "memorystatus_verify_sort_order: %s", buffer);
+                               buffer_idx = 0;
+                       }
+                       p = memorystatus_get_next_proc_locked(&bucket_index, p, FALSE);
+                       i++;
+               }
+               if (buffer_idx != 0) {
+                       os_log_error(OS_LOG_DEFAULT, "memorystatus_verify_sort_order: %s", buffer);
+               }
+               error = EINVAL;
+       }
+       return error;
+}
+

 /*
  * Triggers a sort_order on a specified jetsam priority band.
  * This is for testing only, used to force a path through the sort
  * function.
  */
 static int
 /*
  * Triggers a sort_order on a specified jetsam priority band.
  * This is for testing only, used to force a path through the sort
  * function.
  */
 static int

-memorystatus_cmd_test_jetsam_sort(int priority, int sort_order)
+memorystatus_cmd_test_jetsam_sort(int priority,
+    int sort_order,
+    user_addr_t expected_order_user,
+    size_t expected_order_user_len)

 {
        int error = 0;
 {
        int error = 0;

-

        unsigned int bucket_index = 0;
        unsigned int bucket_index = 0;

+       static size_t kMaxPids = 8;
+       pid_t expected_order[kMaxPids];
+       size_t copy_size = sizeof(expected_order);
+       size_t num_pids;
+
+       if (expected_order_user_len < copy_size) {
+               copy_size = expected_order_user_len;
+       }
+       num_pids = copy_size / sizeof(pid_t);
+
+       error = copyin(expected_order_user, expected_order, copy_size);
+       if (error != 0) {
+               return error;
+       }

 
        if (priority == -1) {
                /* Use as shorthand for default priority */
 
        if (priority == -1) {
                /* Use as shorthand for default priority */


@@ -5141,7 +5461,19 @@ memorystatus_cmd_test_jetsam_sort(int priority, int sort_order)
                bucket_index = (unsigned int)priority;
        }
 
                bucket_index = (unsigned int)priority;
        }
 

-       error = memorystatus_sort_bucket(bucket_index, sort_order);
+       /*
+        * Acquire lock before sorting so we can check the sort order
+        * while still holding the lock.
+        */
+       proc_list_lock();
+
+       memorystatus_sort_bucket_locked(bucket_index, sort_order);
+
+       if (expected_order_user != CAST_USER_ADDR_T(NULL) && expected_order_user_len > 0) {
+               error = memorystatus_verify_sort_order(bucket_index, expected_order, num_pids);
+       }
+
+       proc_list_unlock();

 
        return error;
 }
 
        return error;
 }


@@ -5283,7 +5615,7 @@ memorystatus_kill_proc(proc_t p, uint32_t cause, os_reason_t jetsam_reason, bool
            (unsigned long)tv_sec, tv_msec, kill_reason_string,
            aPid, ((p && *p->p_name) ? p->p_name : "unknown"),
            memorystatus_kill_cause_name[cause], aPid_ep,
            (unsigned long)tv_sec, tv_msec, kill_reason_string,
            aPid, ((p && *p->p_name) ? p->p_name : "unknown"),
            memorystatus_kill_cause_name[cause], aPid_ep,

-           (*footprint_of_killed_proc) >> 10, (uint64_t)memorystatus_available_pages);
+           (*footprint_of_killed_proc) >> 10, (uint64_t)MEMORYSTATUS_LOG_AVAILABLE_PAGES);

 
        return retval;
 }
 
        return retval;
 }


@@ -5308,7 +5640,7 @@ memorystatus_kill_top_process(boolean_t any, boolean_t sort_flag, uint32_t cause
 #endif
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_START,
 #endif
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_START,

-           memorystatus_available_pages, 0, 0, 0, 0);
+           MEMORYSTATUS_LOG_AVAILABLE_PAGES, 0, 0, 0, 0);

 
 
 #if CONFIG_JETSAM
 
 
 #if CONFIG_JETSAM


@@ -5491,7 +5823,7 @@ exit:
        }
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_END,
        }
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_END,

-           memorystatus_available_pages, killed ? aPid : 0, killed, *memory_reclaimed, 0);
+           MEMORYSTATUS_LOG_AVAILABLE_PAGES, killed ? aPid : 0, killed, *memory_reclaimed, 0);

 
        return killed;
 }
 
        return killed;
 }


@@ -5520,7 +5852,7 @@ memorystatus_kill_processes_aggressive(uint32_t cause, int aggr_count,
        *memory_reclaimed = 0;
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_START,
        *memory_reclaimed = 0;
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_START,

-           memorystatus_available_pages, priority_max, 0, 0, 0);
+           MEMORYSTATUS_LOG_AVAILABLE_PAGES, priority_max, 0, 0, 0);

 
        if (priority_max >= JETSAM_PRIORITY_FOREGROUND) {
                /*
 
        if (priority_max >= JETSAM_PRIORITY_FOREGROUND) {
                /*


@@ -5634,7 +5966,7 @@ memorystatus_kill_processes_aggressive(uint32_t cause, int aggr_count,
                            (unsigned long)tv_sec, tv_msec,
                            ((aPid_ep == JETSAM_PRIORITY_IDLE) ? "killing_idle_process_aggressive" : "killing_top_process_aggressive"),
                            aggr_count, aPid, (*p->p_name ? p->p_name : "unknown"),
                            (unsigned long)tv_sec, tv_msec,
                            ((aPid_ep == JETSAM_PRIORITY_IDLE) ? "killing_idle_process_aggressive" : "killing_top_process_aggressive"),
                            aggr_count, aPid, (*p->p_name ? p->p_name : "unknown"),

-                           memorystatus_kill_cause_name[cause], aPid_ep, (uint64_t)memorystatus_available_pages);
+                           memorystatus_kill_cause_name[cause], aPid_ep, (uint64_t)MEMORYSTATUS_LOG_AVAILABLE_PAGES);

 
                        memorystatus_level_snapshot = memorystatus_level;
 
 
                        memorystatus_level_snapshot = memorystatus_level;
 


@@ -5719,7 +6051,7 @@ exit:
        }
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_END,
        }
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_END,

-           memorystatus_available_pages, 0, kill_count, *memory_reclaimed, 0);
+           MEMORYSTATUS_LOG_AVAILABLE_PAGES, 0, kill_count, *memory_reclaimed, 0);

 
        if (kill_count > 0) {
                return TRUE;
 
        if (kill_count > 0) {
                return TRUE;


@@ -5738,7 +6070,7 @@ memorystatus_kill_hiwat_proc(uint32_t *errors, boolean_t *purged, uint64_t *memo
        uint32_t aPid_ep;
        os_reason_t jetsam_reason = OS_REASON_NULL;
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM_HIWAT) | DBG_FUNC_START,
        uint32_t aPid_ep;
        os_reason_t jetsam_reason = OS_REASON_NULL;
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM_HIWAT) | DBG_FUNC_START,

-           memorystatus_available_pages, 0, 0, 0, 0);
+           MEMORYSTATUS_LOG_AVAILABLE_PAGES, 0, 0, 0, 0);

 
        jetsam_reason = os_reason_create(OS_REASON_JETSAM, JETSAM_REASON_MEMORY_HIGHWATER);
        if (jetsam_reason == OS_REASON_NULL) {
 
        jetsam_reason = os_reason_create(OS_REASON_JETSAM, JETSAM_REASON_MEMORY_HIGHWATER);
        if (jetsam_reason == OS_REASON_NULL) {


@@ -5862,7 +6194,7 @@ exit:
        }
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM_HIWAT) | DBG_FUNC_END,
        }
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM_HIWAT) | DBG_FUNC_END,

-           memorystatus_available_pages, killed ? aPid : 0, killed, *memory_reclaimed, 0);
+           MEMORYSTATUS_LOG_AVAILABLE_PAGES, killed ? aPid : 0, killed, *memory_reclaimed, 0);

 
        return killed;
 }
 
        return killed;
 }


@@ -5889,7 +6221,7 @@ memorystatus_kill_elevated_process(uint32_t cause, os_reason_t jetsam_reason, un
 
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_START,
 
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_START,

-           memorystatus_available_pages, 0, 0, 0, 0);
+           MEMORYSTATUS_LOG_AVAILABLE_PAGES, 0, 0, 0, 0);

 
 #if CONFIG_FREEZE
        boolean_t consider_frozen_only = FALSE;
 
 #if CONFIG_FREEZE
        boolean_t consider_frozen_only = FALSE;


@@ -5934,7 +6266,7 @@ memorystatus_kill_elevated_process(uint32_t cause, os_reason_t jetsam_reason, un
                MEMORYSTATUS_DEBUG(1, "jetsam: elevated%d process pid %d [%s] - memorystatus_available_pages: %d\n",
                    aggr_count,
                    aPid, (*p->p_name ? p->p_name : "unknown"),
                MEMORYSTATUS_DEBUG(1, "jetsam: elevated%d process pid %d [%s] - memorystatus_available_pages: %d\n",
                    aggr_count,
                    aPid, (*p->p_name ? p->p_name : "unknown"),

-                   memorystatus_available_pages);
+                   MEMORYSTATUS_LOG_AVAILABLE_PAGES);

 #endif /* DEVELOPMENT || DEBUG */
 
                if (memorystatus_jetsam_snapshot_count == 0) {
 #endif /* DEVELOPMENT || DEBUG */
 
                if (memorystatus_jetsam_snapshot_count == 0) {


@@ -5966,7 +6298,7 @@ memorystatus_kill_elevated_process(uint32_t cause, os_reason_t jetsam_reason, un
                            aggr_count,
                            aPid, ((p && *p->p_name) ? p->p_name : "unknown"),
                            memorystatus_kill_cause_name[cause], aPid_ep,
                            aggr_count,
                            aPid, ((p && *p->p_name) ? p->p_name : "unknown"),
                            memorystatus_kill_cause_name[cause], aPid_ep,

-                           footprint_of_killed_proc >> 10, (uint64_t)memorystatus_available_pages);
+                           footprint_of_killed_proc >> 10, (uint64_t)MEMORYSTATUS_LOG_AVAILABLE_PAGES);

 
                        /* Success? */
                        if (killed) {
 
                        /* Success? */
                        if (killed) {


@@ -6019,7 +6351,7 @@ exit:
        }
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_END,
        }
 
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_JETSAM) | DBG_FUNC_END,

-           memorystatus_available_pages, killed ? aPid : 0, kill_count, *memory_reclaimed, 0);
+           MEMORYSTATUS_LOG_AVAILABLE_PAGES, killed ? aPid : 0, kill_count, *memory_reclaimed, 0);

 
        return killed;
 }
 
        return killed;
 }


@@ -6165,13 +6497,11 @@ memorystatus_get_priority_list(memorystatus_priority_entry_t **list_ptr, size_t
                return EINVAL;
        }
 
                return EINVAL;
        }
 

-       *list_ptr = (memorystatus_priority_entry_t*)kalloc(*list_size);
+       *list_ptr = kheap_alloc(KHEAP_TEMP, *list_size, Z_WAITOK | Z_ZERO);

        if (!*list_ptr) {
                return ENOMEM;
        }
 
        if (!*list_ptr) {
                return ENOMEM;
        }
 

-       memset(*list_ptr, 0, *list_size);
-

        *buffer_size = *list_size;
        *list_size = 0;
 
        *buffer_size = *list_size;
        *list_size = 0;
 


@@ -6275,12 +6605,13 @@ memorystatus_cmd_get_priority_list(pid_t pid, user_addr_t buffer, size_t buffer_
                }
 
                if (list) {
                }
 
                if (list) {

-                       kfree(list, buffer_size);
+                       kheap_free(KHEAP_TEMP, list, buffer_size);

                }
        }
 
        if (error == 0) {
                }
        }
 
        if (error == 0) {

-               *retval = list_size;
+               assert(list_size <= INT32_MAX);
+               *retval = (int32_t) list_size;

        }
 
        return error;
        }
 
        return error;


@@ -6340,7 +6671,7 @@ memorystatus_update_levels_locked(boolean_t critical_only)
        }
 
 #if VM_PRESSURE_EVENTS
        }
 
 #if VM_PRESSURE_EVENTS

-       memorystatus_available_pages_pressure = pressure_threshold_percentage * (atop_64(max_mem) / 100);
+       memorystatus_available_pages_pressure = (int32_t)(pressure_threshold_percentage * (atop_64(max_mem) / 100));

 #endif
 }
 
 #endif
 }
 


@@ -6471,6 +6802,36 @@ memorystatus_get_jetsam_snapshot_copy(memorystatus_jetsam_snapshot_t **snapshot,
        return 0;
 }
 
        return 0;
 }
 

+#if CONFIG_FREEZE
+static int
+memorystatus_get_jetsam_snapshot_freezer(memorystatus_jetsam_snapshot_t **snapshot, size_t *snapshot_size, boolean_t size_only)
+{
+       size_t input_size = *snapshot_size;
+
+       if (memorystatus_jetsam_snapshot_freezer->entry_count > 0) {
+               *snapshot_size = sizeof(memorystatus_jetsam_snapshot_t) + (sizeof(memorystatus_jetsam_snapshot_entry_t) * (memorystatus_jetsam_snapshot_freezer->entry_count));
+       } else {
+               *snapshot_size = 0;
+       }
+       assert(*snapshot_size <= memorystatus_jetsam_snapshot_freezer_size);
+
+       if (size_only) {
+               return 0;
+       }
+
+       if (input_size < *snapshot_size) {
+               return EINVAL;
+       }
+
+       *snapshot = memorystatus_jetsam_snapshot_freezer;
+
+       MEMORYSTATUS_DEBUG(7, "memorystatus_get_jetsam_snapshot_freezer: returned inputsize (%ld), snapshot_size(%ld), listcount(%ld)\n",
+           (long)input_size, (long)*snapshot_size, (long)memorystatus_jetsam_snapshot_freezer->entry_count);
+
+       return 0;
+}
+#endif /* CONFIG_FREEZE */
+

 static int
 memorystatus_get_on_demand_snapshot(memorystatus_jetsam_snapshot_t **snapshot, size_t *snapshot_size, boolean_t size_only)
 {
 static int
 memorystatus_get_on_demand_snapshot(memorystatus_jetsam_snapshot_t **snapshot, size_t *snapshot_size, boolean_t size_only)
 {


@@ -6497,7 +6858,7 @@ memorystatus_get_on_demand_snapshot(memorystatus_jetsam_snapshot_t **snapshot, s
        /*
         * Allocate and initialize a snapshot buffer.
         */
        /*
         * Allocate and initialize a snapshot buffer.
         */

-       ods = (memorystatus_jetsam_snapshot_t *)kalloc(*snapshot_size);
+       ods = kalloc(*snapshot_size);

        if (!ods) {
                return ENOMEM;
        }
        if (!ods) {
                return ENOMEM;
        }


@@ -6558,6 +6919,9 @@ memorystatus_cmd_get_jetsam_snapshot(int32_t flags, user_addr_t buffer, size_t b
        boolean_t is_default_snapshot = FALSE;
        boolean_t is_on_demand_snapshot = FALSE;
        boolean_t is_at_boot_snapshot = FALSE;
        boolean_t is_default_snapshot = FALSE;
        boolean_t is_on_demand_snapshot = FALSE;
        boolean_t is_at_boot_snapshot = FALSE;

+#if CONFIG_FREEZE
+       bool is_freezer_snapshot = false;
+#endif /* CONFIG_FREEZE */

        memorystatus_jetsam_snapshot_t *snapshot;
 
        size_only = ((buffer == USER_ADDR_NULL) ? TRUE : FALSE);
        memorystatus_jetsam_snapshot_t *snapshot;
 
        size_only = ((buffer == USER_ADDR_NULL) ? TRUE : FALSE);


@@ -6567,7 +6931,7 @@ memorystatus_cmd_get_jetsam_snapshot(int32_t flags, user_addr_t buffer, size_t b
                is_default_snapshot = TRUE;
                error = memorystatus_get_jetsam_snapshot(&snapshot, &buffer_size, size_only);
        } else {
                is_default_snapshot = TRUE;
                error = memorystatus_get_jetsam_snapshot(&snapshot, &buffer_size, size_only);
        } else {

-               if (flags & ~(MEMORYSTATUS_SNAPSHOT_ON_DEMAND | MEMORYSTATUS_SNAPSHOT_AT_BOOT | MEMORYSTATUS_SNAPSHOT_COPY)) {
+               if (flags & ~(MEMORYSTATUS_SNAPSHOT_ON_DEMAND | MEMORYSTATUS_SNAPSHOT_AT_BOOT | MEMORYSTATUS_SNAPSHOT_COPY | MEMORYSTATUS_FLAGS_SNAPSHOT_FREEZER)) {

                        /*
                         * Unsupported bit set in flag.
                         */
                        /*
                         * Unsupported bit set in flag.
                         */


@@ -6593,6 +6957,11 @@ memorystatus_cmd_get_jetsam_snapshot(int32_t flags, user_addr_t buffer, size_t b
                        error = memorystatus_get_at_boot_snapshot(&snapshot, &buffer_size, size_only);
                } else if (flags & MEMORYSTATUS_SNAPSHOT_COPY) {
                        error = memorystatus_get_jetsam_snapshot_copy(&snapshot, &buffer_size, size_only);
                        error = memorystatus_get_at_boot_snapshot(&snapshot, &buffer_size, size_only);
                } else if (flags & MEMORYSTATUS_SNAPSHOT_COPY) {
                        error = memorystatus_get_jetsam_snapshot_copy(&snapshot, &buffer_size, size_only);

+#if CONFIG_FREEZE
+               } else if (flags & MEMORYSTATUS_FLAGS_SNAPSHOT_FREEZER) {
+                       is_freezer_snapshot = true;
+                       error = memorystatus_get_jetsam_snapshot_freezer(&snapshot, &buffer_size, size_only);
+#endif /* CONFIG_FREEZE */

                } else {
                        /*
                         * Invalid flag setting.
                } else {
                        /*
                         * Invalid flag setting.


@@ -6615,20 +6984,40 @@ memorystatus_cmd_get_jetsam_snapshot(int32_t flags, user_addr_t buffer, size_t b
         *      there is nothing to clear or update.
         * If working with a copy of the snapshot
         *      there is nothing to clear or update.
         *      there is nothing to clear or update.
         * If working with a copy of the snapshot
         *      there is nothing to clear or update.

+        * If working with the freezer snapshot
+        *      clearing the buffer means, reset the count.

         */
        if (!size_only) {
                if ((error = copyout(snapshot, buffer, buffer_size)) == 0) {
         */
        if (!size_only) {
                if ((error = copyout(snapshot, buffer, buffer_size)) == 0) {

+#if CONFIG_FREEZE
+                       if (is_default_snapshot || is_freezer_snapshot) {
+#else

                        if (is_default_snapshot) {
                        if (is_default_snapshot) {

+#endif /* CONFIG_FREEZE */

                                /*
                                 * The jetsam snapshot is never freed, its count is simply reset.
                                 * However, we make a copy for any parties that might be interested
                                 * in the previous fully populated snapshot.
                                 */
                                proc_list_lock();
                                /*
                                 * The jetsam snapshot is never freed, its count is simply reset.
                                 * However, we make a copy for any parties that might be interested
                                 * in the previous fully populated snapshot.
                                 */
                                proc_list_lock();

-                               memcpy(memorystatus_jetsam_snapshot_copy, memorystatus_jetsam_snapshot, memorystatus_jetsam_snapshot_size);
-                               memorystatus_jetsam_snapshot_copy_count = memorystatus_jetsam_snapshot_count;
-                               snapshot->entry_count = memorystatus_jetsam_snapshot_count = 0;
-                               memorystatus_jetsam_snapshot_last_timestamp = 0;
+#if DEVELOPMENT || DEBUG
+                               if (memorystatus_testing_pid != 0 && memorystatus_testing_pid != current_proc()->p_pid) {
+                                       /* Snapshot is currently owned by someone else. Don't consume it. */
+                                       proc_list_unlock();
+                                       goto out;
+                               }
+#endif /* (DEVELOPMENT || DEBUG)*/
+                               if (is_default_snapshot) {
+                                       memcpy(memorystatus_jetsam_snapshot_copy, memorystatus_jetsam_snapshot, memorystatus_jetsam_snapshot_size);
+                                       memorystatus_jetsam_snapshot_copy_count = memorystatus_jetsam_snapshot_count;
+                                       snapshot->entry_count = memorystatus_jetsam_snapshot_count = 0;
+                                       memorystatus_jetsam_snapshot_last_timestamp = 0;
+                               }
+#if CONFIG_FREEZE
+                               else if (is_freezer_snapshot) {
+                                       memorystatus_jetsam_snapshot_freezer->entry_count = 0;
+                               }
+#endif /* CONFIG_FREEZE */

                                proc_list_unlock();
                        }
                }
                                proc_list_unlock();
                        }
                }


@@ -6644,13 +7033,47 @@ memorystatus_cmd_get_jetsam_snapshot(int32_t flags, user_addr_t buffer, size_t b
                }
        }
 
                }
        }
 

+out:

        if (error == 0) {
        if (error == 0) {

-               *retval = buffer_size;
+               assert(buffer_size <= INT32_MAX);
+               *retval = (int32_t) buffer_size;

        }
        }

-out:

        return error;
 }
 
        return error;
 }
 

+#if DEVELOPMENT || DEBUG
+static int
+memorystatus_cmd_set_testing_pid(int32_t flags)
+{
+       int error = EINVAL;
+       proc_t caller = current_proc();
+       assert(caller != kernproc);
+       proc_list_lock();
+       if (flags & MEMORYSTATUS_FLAGS_SET_TESTING_PID) {
+               if (memorystatus_testing_pid == 0) {
+                       memorystatus_testing_pid = caller->p_pid;
+                       error = 0;
+               } else if (memorystatus_testing_pid == caller->p_pid) {
+                       error = 0;
+               } else {
+                       /* We don't allow ownership to be taken from another proc. */
+                       error = EBUSY;
+               }
+       } else if (flags & MEMORYSTATUS_FLAGS_UNSET_TESTING_PID) {
+               if (memorystatus_testing_pid == caller->p_pid) {
+                       memorystatus_testing_pid = 0;
+                       error = 0;
+               } else if (memorystatus_testing_pid != 0) {
+                       /* We don't allow ownership to be taken from another proc. */
+                       error = EPERM;
+               }
+       }
+       proc_list_unlock();
+
+       return error;
+}
+#endif /* DEVELOPMENT || DEBUG */
+

 /*
  *      Routine:       memorystatus_cmd_grp_set_priorities
  *     Purpose:        Update priorities for a group of processes.
 /*
  *      Routine:       memorystatus_cmd_grp_set_priorities
  *     Purpose:        Update priorities for a group of processes.


@@ -6696,7 +7119,7 @@ memorystatus_cmd_grp_set_priorities(user_addr_t buffer, size_t buffer_size)
 
        int error = 0;
        memorystatus_properties_entry_v1_t *entries = NULL;
 
        int error = 0;
        memorystatus_properties_entry_v1_t *entries = NULL;

-       uint32_t entry_count = 0;
+       size_t entry_count = 0;

 
        /* This will be the ordered proc list */
        typedef struct memorystatus_internal_properties {
 
        /* This will be the ordered proc list */
        typedef struct memorystatus_internal_properties {


@@ -6708,7 +7131,7 @@ memorystatus_cmd_grp_set_priorities(user_addr_t buffer, size_t buffer_size)
        size_t table_size = 0;
        uint32_t table_count = 0;
 
        size_t table_size = 0;
        uint32_t table_count = 0;
 

-       uint32_t i = 0;
+       size_t i = 0;

        uint32_t bucket_index = 0;
        boolean_t head_insert;
        int32_t new_priority;
        uint32_t bucket_index = 0;
        boolean_t head_insert;
        int32_t new_priority;


@@ -6722,7 +7145,13 @@ memorystatus_cmd_grp_set_priorities(user_addr_t buffer, size_t buffer_size)
        }
 
        entry_count = (buffer_size / sizeof(memorystatus_properties_entry_v1_t));
        }
 
        entry_count = (buffer_size / sizeof(memorystatus_properties_entry_v1_t));

-       if ((entries = (memorystatus_properties_entry_v1_t *)kalloc(buffer_size)) == NULL) {
+       if (entry_count == 0) {
+               /* buffer size was not large enough for a single entry */
+               error = EINVAL;
+               goto out;
+       }
+
+       if ((entries = kheap_alloc(KHEAP_TEMP, buffer_size, Z_WAITOK)) == NULL) {

                error = ENOMEM;
                goto out;
        }
                error = ENOMEM;
                goto out;
        }


@@ -6764,11 +7193,10 @@ memorystatus_cmd_grp_set_priorities(user_addr_t buffer, size_t buffer_size)
        }
 
        table_size = sizeof(memorystatus_internal_properties_t) * entry_count;
        }
 
        table_size = sizeof(memorystatus_internal_properties_t) * entry_count;

-       if ((table = (memorystatus_internal_properties_t *)kalloc(table_size)) == NULL) {
+       if ((table = kheap_alloc(KHEAP_TEMP, table_size, Z_WAITOK | Z_ZERO)) == NULL) {

                error = ENOMEM;
                goto out;
        }
                error = ENOMEM;
                goto out;
        }

-       memset(table, 0, table_size);

 
 
        /*
 
 
        /*


@@ -6839,10 +7267,10 @@ out:
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_GRP_SET_PROP) | DBG_FUNC_END, MEMORYSTATUS_FLAGS_GRP_SET_PRIORITY, entry_count, table_count, 0, 0);
 
        if (entries) {
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_GRP_SET_PROP) | DBG_FUNC_END, MEMORYSTATUS_FLAGS_GRP_SET_PRIORITY, entry_count, table_count, 0, 0);
 
        if (entries) {

-               kfree(entries, buffer_size);
+               kheap_free(KHEAP_TEMP, entries, buffer_size);

        }
        if (table) {
        }
        if (table) {

-               kfree(table, table_size);
+               kheap_free(KHEAP_TEMP, table, table_size);

        }
 
        return error;
        }
 
        return error;


@@ -6856,9 +7284,16 @@ memorystatus_cmd_grp_set_probabilities(user_addr_t buffer, size_t buffer_size)
 {
        int error = 0;
        memorystatus_properties_entry_v1_t *entries = NULL;
 {
        int error = 0;
        memorystatus_properties_entry_v1_t *entries = NULL;

-       uint32_t entry_count = 0, i = 0;
+       size_t entry_count = 0, i = 0;

        memorystatus_internal_probabilities_t *tmp_table_new = NULL, *tmp_table_old = NULL;
        size_t tmp_table_new_size = 0, tmp_table_old_size = 0;
        memorystatus_internal_probabilities_t *tmp_table_new = NULL, *tmp_table_old = NULL;
        size_t tmp_table_new_size = 0, tmp_table_old_size = 0;

+#if DEVELOPMENT || DEBUG
+       if (memorystatus_testing_pid != 0 && memorystatus_testing_pid != current_proc()->p_pid) {
+               /* probabilites are currently owned by someone else. Don't change them. */
+               error = EPERM;
+               goto out;
+       }
+#endif /* (DEVELOPMENT || DEBUG)*/

 
        /* Verify inputs */
        if ((buffer == USER_ADDR_NULL) || (buffer_size == 0)) {
 
        /* Verify inputs */
        if ((buffer == USER_ADDR_NULL) || (buffer_size == 0)) {


@@ -6868,7 +7303,7 @@ memorystatus_cmd_grp_set_probabilities(user_addr_t buffer, size_t buffer_size)
 
        entry_count = (buffer_size / sizeof(memorystatus_properties_entry_v1_t));
 
 
        entry_count = (buffer_size / sizeof(memorystatus_properties_entry_v1_t));
 

-       if ((entries = (memorystatus_properties_entry_v1_t *) kalloc(buffer_size)) == NULL) {
+       if ((entries = kheap_alloc(KHEAP_TEMP, buffer_size, Z_WAITOK)) == NULL) {

                error = ENOMEM;
                goto out;
        }
                error = ENOMEM;
                goto out;
        }


@@ -6907,11 +7342,10 @@ memorystatus_cmd_grp_set_probabilities(user_addr_t buffer, size_t buffer_size)
 
        tmp_table_new_size = sizeof(memorystatus_internal_probabilities_t) * entry_count;
 
 
        tmp_table_new_size = sizeof(memorystatus_internal_probabilities_t) * entry_count;
 

-       if ((tmp_table_new = (memorystatus_internal_probabilities_t *) kalloc(tmp_table_new_size)) == NULL) {
+       if ((tmp_table_new = kalloc_flags(tmp_table_new_size, Z_WAITOK | Z_ZERO)) == NULL) {

                error = ENOMEM;
                goto out;
        }
                error = ENOMEM;
                goto out;
        }

-       memset(tmp_table_new, 0, tmp_table_new_size);

 
        proc_list_lock();
 
 
        proc_list_lock();
 


@@ -6936,7 +7370,7 @@ out:
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_GRP_SET_PROP) | DBG_FUNC_END, MEMORYSTATUS_FLAGS_GRP_SET_PROBABILITY, entry_count, tmp_table_new_size, 0, 0);
 
        if (entries) {
        KERNEL_DEBUG_CONSTANT(BSDDBG_CODE(DBG_BSD_MEMSTAT, BSD_MEMSTAT_GRP_SET_PROP) | DBG_FUNC_END, MEMORYSTATUS_FLAGS_GRP_SET_PROBABILITY, entry_count, tmp_table_new_size, 0, 0);
 
        if (entries) {

-               kfree(entries, buffer_size);
+               kheap_free(KHEAP_TEMP, entries, buffer_size);

                entries = NULL;
        }
 
                entries = NULL;
        }
 


@@ -7258,7 +7692,7 @@ memorystatus_set_memlimit_properties_internal(proc_t p, memorystatus_memlimit_pr
 {
        int error = 0;
 
 {
        int error = 0;
 

-       LCK_MTX_ASSERT(proc_list_mlock, LCK_MTX_ASSERT_OWNED);
+       LCK_MTX_ASSERT(&proc_list_mlock, LCK_MTX_ASSERT_OWNED);

 
        /*
         * Store the active limit variants in the proc.
 
        /*
         * Store the active limit variants in the proc.


@@ -7470,8 +7904,10 @@ memorystatus_control(struct proc *p __unused, struct memorystatus_control_args *
     #pragma unused(jetsam_reason)
 #endif
 
     #pragma unused(jetsam_reason)
 #endif
 

-       /* We don't need entitlements if we're setting/ querying the freeze preference for a process. Skip the check below. */
-       if (args->command == MEMORYSTATUS_CMD_SET_PROCESS_IS_FREEZABLE || args->command == MEMORYSTATUS_CMD_GET_PROCESS_IS_FREEZABLE) {
+       /* We don't need entitlements if we're setting / querying the freeze preference or frozen status for a process. */
+       if (args->command == MEMORYSTATUS_CMD_SET_PROCESS_IS_FREEZABLE ||
+           args->command == MEMORYSTATUS_CMD_GET_PROCESS_IS_FREEZABLE ||
+           args->command == MEMORYSTATUS_CMD_GET_PROCESS_IS_FROZEN) {

                skip_auth_check = TRUE;
        }
 
                skip_auth_check = TRUE;
        }
 


@@ -7514,6 +7950,11 @@ memorystatus_control(struct proc *p __unused, struct memorystatus_control_args *
        case MEMORYSTATUS_CMD_GET_JETSAM_SNAPSHOT:
                error = memorystatus_cmd_get_jetsam_snapshot((int32_t)args->flags, args->buffer, args->buffersize, ret);
                break;
        case MEMORYSTATUS_CMD_GET_JETSAM_SNAPSHOT:
                error = memorystatus_cmd_get_jetsam_snapshot((int32_t)args->flags, args->buffer, args->buffersize, ret);
                break;

+#if DEVELOPMENT || DEBUG
+       case MEMORYSTATUS_CMD_SET_TESTING_PID:
+               error = memorystatus_cmd_set_testing_pid((int32_t) args->flags);
+               break;
+#endif

        case MEMORYSTATUS_CMD_GET_PRESSURE_STATUS:
                error = memorystatus_cmd_get_pressure_status(ret);
                break;
        case MEMORYSTATUS_CMD_GET_PRESSURE_STATUS:
                error = memorystatus_cmd_get_pressure_status(ret);
                break;


@@ -7546,7 +7987,7 @@ memorystatus_control(struct proc *p __unused, struct memorystatus_control_args *
                error = memorystatus_kill_process_sync(args->pid, kMemorystatusKilled, jetsam_reason) ? 0 : EINVAL;
                break;
        case MEMORYSTATUS_CMD_TEST_JETSAM_SORT:
                error = memorystatus_kill_process_sync(args->pid, kMemorystatusKilled, jetsam_reason) ? 0 : EINVAL;
                break;
        case MEMORYSTATUS_CMD_TEST_JETSAM_SORT:

-               error = memorystatus_cmd_test_jetsam_sort(args->pid, (int32_t)args->flags);
+               error = memorystatus_cmd_test_jetsam_sort(args->pid, (int32_t)args->flags, args->buffer, args->buffersize);

                break;
 #if CONFIG_JETSAM
        case MEMORYSTATUS_CMD_SET_JETSAM_PANIC_BITS:
                break;
 #if CONFIG_JETSAM
        case MEMORYSTATUS_CMD_SET_JETSAM_PANIC_BITS:


@@ -7604,12 +8045,13 @@ memorystatus_control(struct proc *p __unused, struct memorystatus_control_args *
        case MEMORYSTATUS_CMD_GET_PROCESS_IS_FREEZABLE:
                error = memorystatus_get_process_is_freezable(args->pid, ret);
                break;
        case MEMORYSTATUS_CMD_GET_PROCESS_IS_FREEZABLE:
                error = memorystatus_get_process_is_freezable(args->pid, ret);
                break;

+       case MEMORYSTATUS_CMD_GET_PROCESS_IS_FROZEN:
+               error = memorystatus_get_process_is_frozen(args->pid, ret);
+               break;

 
 

-#if DEVELOPMENT || DEBUG

        case MEMORYSTATUS_CMD_FREEZER_CONTROL:
                error = memorystatus_freezer_control(args->flags, args->buffer, args->buffersize, ret);
                break;
        case MEMORYSTATUS_CMD_FREEZER_CONTROL:
                error = memorystatus_freezer_control(args->flags, args->buffer, args->buffersize, ret);
                break;

-#endif /* DEVELOPMENT || DEBUG */

 #endif /* CONFIG_FREEZE */
 
 #if CONFIG_JETSAM
 #endif /* CONFIG_FREEZE */
 
 #if CONFIG_JETSAM


@@ -7617,7 +8059,7 @@ memorystatus_control(struct proc *p __unused, struct memorystatus_control_args *
        case MEMORYSTATUS_CMD_INCREASE_JETSAM_TASK_LIMIT:
                error = memorystatus_cmd_increase_jetsam_task_limit(args->pid, args->flags);
                break;
        case MEMORYSTATUS_CMD_INCREASE_JETSAM_TASK_LIMIT:
                error = memorystatus_cmd_increase_jetsam_task_limit(args->pid, args->flags);
                break;

-#endif /* DEVELOPMENT */
+#endif /* DEVELOPMENT || DEBUG */

 #endif /* CONFIG_JETSAM */
 
        default:
 #endif /* CONFIG_JETSAM */
 
        default:


@@ -8035,12 +8477,13 @@ memorystatus_update_priority_for_appnap(proc_t p, boolean_t is_appnap)
 }
 
 uint64_t
 }
 
 uint64_t

-memorystatus_available_memory_internal(proc_t p)
+memorystatus_available_memory_internal(struct proc *p)

 {
 #ifdef XNU_TARGET_OS_OSX
 {
 #ifdef XNU_TARGET_OS_OSX

-       #pragma unused(p)
-       return 0;
-#else
+       if (p->p_memstat_memlimit <= 0) {
+               return 0;
+       }
+#endif /* XNU_TARGET_OS_OSX */

        const uint64_t footprint_in_bytes = get_task_phys_footprint(p->task);
        int32_t memlimit_mb;
        int64_t memlimit_bytes;
        const uint64_t footprint_in_bytes = get_task_phys_footprint(p->task);
        int32_t memlimit_mb;
        int64_t memlimit_bytes;


@@ -8065,7 +8508,6 @@ memorystatus_available_memory_internal(proc_t p)
        rc = memlimit_bytes - footprint_in_bytes;
 
        return (rc >= 0) ? rc : 0;
        rc = memlimit_bytes - footprint_in_bytes;
 
        return (rc >= 0) ? rc : 0;

-#endif

 }
 
 int
 }
 
 int


@@ -8095,7 +8537,8 @@ memorystatus_cmd_increase_jetsam_task_limit(pid_t pid, uint32_t byte_increase)
        }
 
        const uint32_t current_memlimit_increase = roundToNearestMB(p->p_memlimit_increase);
        }
 
        const uint32_t current_memlimit_increase = roundToNearestMB(p->p_memlimit_increase);

-       const uint32_t page_aligned_increase = round_page(p->p_memlimit_increase + byte_increase); /* round to page */
+       /* round to page */
+       const int32_t page_aligned_increase = (int32_t) MIN(round_page(p->p_memlimit_increase + byte_increase), INT32_MAX);

 
        proc_list_lock();
 
 
        proc_list_lock();