#include <zone_debug.h>
#include <zone_alias_addr.h>
#include <mach/mach_types.h>
#include <mach/vm_param.h>
#include <mach/kern_return.h>
#include <mach/mach_host_server.h>
#include <mach/task_server.h>
#include <mach/machine/vm_types.h>
#include <mach_debug/zone_info.h>
#include <mach/vm_map.h>
#include <kern/kern_types.h>
#include <kern/assert.h>
#include <kern/host.h>
#include <kern/macro_help.h>
#include <kern/sched.h>
#include <kern/locks.h>
#include <kern/sched_prim.h>
#include <kern/misc_protos.h>
#include <kern/thread_call.h>
#include <kern/zalloc.h>
#include <kern/kalloc.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <vm/vm_page.h>
#include <pexpert/pexpert.h>
#include <machine/machparam.h>
#include <libkern/OSDebug.h>
#include <libkern/OSAtomic.h>
#include <sys/kdebug.h>
#define ZP_POISON 0xdeadbeef
#define ZP_POISONED 0xfeedface
#define ZP_NOT_POISONED 0xbaddecaf
#if CONFIG_EMBEDDED
#define ZP_DEFAULT_SAMPLING_FACTOR 0
#else
#define ZP_DEFAULT_SAMPLING_FACTOR 16
#endif
uint32_t free_check_sample_factor = 0;
boolean_t corruption_debug_flag = FALSE;
#define is_kernel_data_addr(a) (!(a) || ((a) >= vm_min_kernel_address && !((a) & 0x3)))
static inline void
free_to_zone(zone_t zone, void *elem) {
unsigned int i = sizeof(vm_offset_t) / sizeof(uint32_t);
if (free_check_sample_factor != 0 &&
zone->free_check_count++ % free_check_sample_factor == 0 &&
zone->elem_size >= (2 * sizeof(vm_offset_t) + sizeof(uint32_t))) {
zone->free_check_count = 1;
((uint32_t *) elem)[i] = ZP_POISONED;
for (i++; i < zone->elem_size / sizeof(uint32_t); i++) {
((uint32_t *) elem)[i] = ZP_POISON;
}
((vm_offset_t *) elem)[((zone->elem_size)/sizeof(vm_offset_t))-1] = zone->free_elements;
} else {
((uint32_t *) elem)[i] = ZP_NOT_POISONED;
}
((vm_offset_t *) elem)[0] = zone->free_elements;
zone->free_elements = (vm_offset_t) elem;
zone->count--;
}
static inline void
alloc_from_zone(zone_t zone, void **ret) {
void *elem = (void *) zone->free_elements;
if (elem != NULL) {
unsigned int i = sizeof(vm_offset_t) / sizeof(uint32_t);
if (((uint32_t *) elem)[i] == ZP_POISONED &&
zone->elem_size >= (2 * sizeof(vm_offset_t) + sizeof(uint32_t))) {
if (!is_kernel_data_addr(((vm_offset_t *) elem)[0]) ||
((vm_offset_t *) elem)[0] !=
((vm_offset_t *) elem)[(zone->elem_size/sizeof(vm_offset_t))-1]) {
panic("a freed zone element has been modified in zone: %s",
zone->zone_name);
}
for (i++;
i < zone->elem_size / sizeof(uint32_t) -
sizeof(vm_offset_t) / sizeof(uint32_t);
i++) {
if (((uint32_t *) elem)[i] != ZP_POISON) {
panic("a freed zone element has been modified in zone: %s",
zone->zone_name);
}
}
} else if (((uint32_t *) elem)[i] != ZP_NOT_POISONED) {
panic("a freed zone element has been modified in zone: %s",
zone->zone_name);
}
zone->count++;
zone->sum_count++;
zone->free_elements = ((vm_offset_t *) elem)[0];
}
*ret = elem;
}
struct fake_zone_info {
const char* name;
void (*init)(int);
void (*query)(int *,
vm_size_t *, vm_size_t *, vm_size_t *, vm_size_t *,
uint64_t *, int *, int *, int *);
};
static const struct fake_zone_info fake_zones[] = {
{
.name = "kernel_stacks",
.init = stack_fake_zone_init,
.query = stack_fake_zone_info,
},
{
.name = "page_tables",
.init = pt_fake_zone_init,
.query = pt_fake_zone_info,
},
{
.name = "kalloc.large",
.init = kalloc_fake_zone_init,
.query = kalloc_fake_zone_info,
},
};
static const unsigned int num_fake_zones =
sizeof (fake_zones) / sizeof (fake_zones[0]);
boolean_t zinfo_per_task = FALSE;
#define ZINFO_SLOTS 200
#define ZONES_MAX (ZINFO_SLOTS - num_fake_zones - 1)
typedef uint32_t zone_page_index_t;
#define ZONE_PAGE_INDEX_INVALID ((zone_page_index_t)0xFFFFFFFFU)
struct zone_page_table_entry {
volatile uint16_t alloc_count;
volatile uint16_t collect_count;
};
#define ZONE_PAGE_USED 0
#define ZONE_PAGE_UNUSED 0xffff
void zone_page_init(
vm_offset_t addr,
vm_size_t size);
void zone_page_alloc(
vm_offset_t addr,
vm_size_t size);
void zone_page_free_element(
zone_page_index_t *free_page_head,
zone_page_index_t *free_page_tail,
vm_offset_t addr,
vm_size_t size);
void zone_page_collect(
vm_offset_t addr,
vm_size_t size);
boolean_t zone_page_collectable(
vm_offset_t addr,
vm_size_t size);
void zone_page_keep(
vm_offset_t addr,
vm_size_t size);
void zalloc_async(
thread_call_param_t p0,
thread_call_param_t p1);
void zone_display_zprint( void );
vm_map_t zone_map = VM_MAP_NULL;
zone_t zone_zone = ZONE_NULL;
zone_t zinfo_zone = ZONE_NULL;
vm_offset_t zdata;
vm_size_t zdata_size;
#define zone_wakeup(zone) thread_wakeup((event_t)(zone))
#define zone_sleep(zone) \
(void) lck_mtx_sleep(&(zone)->lock, LCK_SLEEP_SPIN, (event_t)(zone), THREAD_UNINT);
#define lock_zone_init(zone) \
MACRO_BEGIN \
char _name[32]; \
(void) snprintf(_name, sizeof (_name), "zone.%s", (zone)->zone_name); \
lck_grp_attr_setdefault(&(zone)->lock_grp_attr); \
lck_grp_init(&(zone)->lock_grp, _name, &(zone)->lock_grp_attr); \
lck_attr_setdefault(&(zone)->lock_attr); \
lck_mtx_init_ext(&(zone)->lock, &(zone)->lock_ext, \
&(zone)->lock_grp, &(zone)->lock_attr); \
MACRO_END
#define lock_try_zone(zone) lck_mtx_try_lock_spin(&zone->lock)
#define ZONE_PAGE_TABLE_FIRST_LEVEL_SIZE (32)
struct zone_page_table_entry * volatile zone_page_table[ZONE_PAGE_TABLE_FIRST_LEVEL_SIZE];
vm_size_t zone_page_table_used_size;
vm_offset_t zone_map_min_address;
vm_offset_t zone_map_max_address;
unsigned int zone_pages;
unsigned int zone_page_table_second_level_size;
unsigned int zone_page_table_second_level_shift_amount;
#define zone_page_table_first_level_slot(x) ((x) >> zone_page_table_second_level_shift_amount)
#define zone_page_table_second_level_slot(x) ((x) & (zone_page_table_second_level_size - 1))
void zone_page_table_expand(zone_page_index_t pindex);
struct zone_page_table_entry *zone_page_table_lookup(zone_page_index_t pindex);
decl_lck_mtx_data(, zone_gc_lock)
lck_attr_t zone_lck_attr;
lck_grp_t zone_lck_grp;
lck_grp_attr_t zone_lck_grp_attr;
lck_mtx_ext_t zone_lck_ext;
#if !ZONE_ALIAS_ADDR
#define from_zone_map(addr, size) \
((vm_offset_t)(addr) >= zone_map_min_address && \
((vm_offset_t)(addr) + size -1) < zone_map_max_address)
#else
#define from_zone_map(addr, size) \
((vm_offset_t)(zone_virtual_addr((vm_map_address_t)(uintptr_t)addr)) >= zone_map_min_address && \
((vm_offset_t)(zone_virtual_addr((vm_map_address_t)(uintptr_t)addr)) + size -1) < zone_map_max_address)
#endif
decl_simple_lock_data(, all_zones_lock)
zone_t first_zone;
zone_t *last_zone;
unsigned int num_zones;
boolean_t zone_gc_allowed = TRUE;
boolean_t zone_gc_forced = FALSE;
boolean_t panic_include_zprint = FALSE;
boolean_t zone_gc_allowed_by_time_throttle = TRUE;
static int log_records;
#define MAX_ZONE_NAME 32
static char zone_name_to_log[MAX_ZONE_NAME] = "";
#if defined(__LP64__)
#define ZRECORDS_MAX 128000
#else
#define ZRECORDS_MAX 8000
#endif
#define ZRECORDS_DEFAULT 4000
struct zrecord {
void *z_element;
uint32_t z_opcode:1,
z_time:31;
void *z_pc[MAX_ZTRACE_DEPTH];
};
#define ZOP_ALLOC 1
#define ZOP_FREE 0
static struct zrecord *zrecords;
static int zcurrent = 0;
static int zrecorded = 0;
static unsigned int ztime = 0;
static zone_t zone_of_interest = NULL;
static int
log_this_zone(const char *zonename, const char *logname)
{
int len;
const char *zc = zonename;
const char *lc = logname;
for (len = 1; len <= MAX_ZONE_NAME; zc++, lc++, len++) {
if (*zc != *lc && !(*zc == ' ' && *lc == '.'))
break;
if (*zc == '\0')
return TRUE;
}
return FALSE;
}
#define DO_LOGGING(z) (zrecords && (z) == zone_of_interest)
extern boolean_t zlog_ready;
#if CONFIG_ZLEAKS
#pragma mark -
#pragma mark Zone Leak Detection
#define ZLEAK_STATE_ENABLED 0x01
#define ZLEAK_STATE_ACTIVE 0x02
#define ZLEAK_STATE_ACTIVATING 0x04
#define ZLEAK_STATE_FAILED 0x08
uint32_t zleak_state = 0;
boolean_t panic_include_ztrace = FALSE;
vm_size_t zleak_global_tracking_threshold;
vm_size_t zleak_per_zone_tracking_threshold;
unsigned int zleak_sample_factor = 1000;
unsigned int z_alloc_collisions = 0;
unsigned int z_trace_collisions = 0;
unsigned int z_alloc_overwrites = 0;
unsigned int z_trace_overwrites = 0;
unsigned int z_alloc_recorded = 0;
unsigned int z_trace_recorded = 0;
unsigned int z_total_conflicts = 0;
#pragma mark struct zallocation
struct zallocation {
uintptr_t za_element;
vm_size_t za_size;
uint32_t za_trace_index;
uint32_t za_hit_count;
};
uint32_t zleak_alloc_buckets = CONFIG_ZLEAK_ALLOCATION_MAP_NUM;
uint32_t zleak_trace_buckets = CONFIG_ZLEAK_TRACE_MAP_NUM;
vm_size_t zleak_max_zonemap_size;
static struct zallocation* zallocations;
static struct ztrace* ztraces;
struct ztrace* top_ztrace;
static lck_spin_t zleak_lock;
static lck_attr_t zleak_lock_attr;
static lck_grp_t zleak_lock_grp;
static lck_grp_attr_t zleak_lock_grp_attr;
static void
zleak_init(vm_size_t max_zonemap_size)
{
char scratch_buf[16];
boolean_t zleak_enable_flag = FALSE;
zleak_max_zonemap_size = max_zonemap_size;
zleak_global_tracking_threshold = max_zonemap_size / 2;
zleak_per_zone_tracking_threshold = zleak_global_tracking_threshold / 8;
#if CONFIG_EMBEDDED
if (PE_parse_boot_argn("-zleakon", scratch_buf, sizeof(scratch_buf))) {
zleak_enable_flag = TRUE;
printf("zone leak detection enabled\n");
} else {
zleak_enable_flag = FALSE;
printf("zone leak detection disabled\n");
}
#else
if (PE_parse_boot_argn("-zleakoff", scratch_buf, sizeof(scratch_buf))) {
zleak_enable_flag = FALSE;
printf("zone leak detection disabled\n");
} else {
zleak_enable_flag = TRUE;
printf("zone leak detection enabled\n");
}
#endif
if (PE_parse_boot_argn("zfactor", &zleak_sample_factor, sizeof(zleak_sample_factor))) {
printf("Zone leak factor override:%u\n", zleak_sample_factor);
}
if (PE_parse_boot_argn("zleak-allocs", &zleak_alloc_buckets, sizeof(zleak_alloc_buckets))) {
printf("Zone leak alloc buckets override:%u\n", zleak_alloc_buckets);
if (zleak_alloc_buckets == 0 || (zleak_alloc_buckets & (zleak_alloc_buckets-1))) {
printf("Override isn't a power of two, bad things might happen!");
}
}
if (PE_parse_boot_argn("zleak-traces", &zleak_trace_buckets, sizeof(zleak_trace_buckets))) {
printf("Zone leak trace buckets override:%u\n", zleak_trace_buckets);
if (zleak_trace_buckets == 0 || (zleak_trace_buckets & (zleak_trace_buckets-1))) {
printf("Override isn't a power of two, bad things might happen!");
}
}
lck_grp_attr_setdefault(&zleak_lock_grp_attr);
lck_grp_init(&zleak_lock_grp, "zleak_lock", &zleak_lock_grp_attr);
lck_attr_setdefault(&zleak_lock_attr);
lck_spin_init(&zleak_lock, &zleak_lock_grp, &zleak_lock_attr);
if (zleak_enable_flag) {
zleak_state = ZLEAK_STATE_ENABLED;
}
}
#if CONFIG_ZLEAKS
int
get_zleak_state(void)
{
if (zleak_state & ZLEAK_STATE_FAILED)
return (-1);
if (zleak_state & ZLEAK_STATE_ACTIVE)
return (1);
return (0);
}
#endif
kern_return_t
zleak_activate(void)
{
kern_return_t retval;
vm_size_t z_alloc_size = zleak_alloc_buckets * sizeof(struct zallocation);
vm_size_t z_trace_size = zleak_trace_buckets * sizeof(struct ztrace);
void *allocations_ptr = NULL;
void *traces_ptr = NULL;
if (zleak_state & (ZLEAK_STATE_ACTIVE | ZLEAK_STATE_ACTIVATING | ZLEAK_STATE_FAILED)) {
return KERN_SUCCESS;
}
lck_spin_lock(&zleak_lock);
if (zleak_state & (ZLEAK_STATE_ACTIVE | ZLEAK_STATE_ACTIVATING | ZLEAK_STATE_FAILED)) {
lck_spin_unlock(&zleak_lock);
return KERN_SUCCESS;
}
zleak_state |= ZLEAK_STATE_ACTIVATING;
lck_spin_unlock(&zleak_lock);
retval = kmem_alloc_kobject(kernel_map, (vm_offset_t*)&allocations_ptr, z_alloc_size);
if (retval != KERN_SUCCESS) {
goto fail;
}
retval = kmem_alloc_kobject(kernel_map, (vm_offset_t*)&traces_ptr, z_trace_size);
if (retval != KERN_SUCCESS) {
goto fail;
}
bzero(allocations_ptr, z_alloc_size);
bzero(traces_ptr, z_trace_size);
zallocations = allocations_ptr;
ztraces = traces_ptr;
top_ztrace = &ztraces[0];
lck_spin_lock(&zleak_lock);
zleak_state |= ZLEAK_STATE_ACTIVE;
zleak_state &= ~ZLEAK_STATE_ACTIVATING;
lck_spin_unlock(&zleak_lock);
return 0;
fail:
lck_spin_lock(&zleak_lock);
zleak_state |= ZLEAK_STATE_FAILED;
zleak_state &= ~ZLEAK_STATE_ACTIVATING;
lck_spin_unlock(&zleak_lock);
if (allocations_ptr != NULL) {
kmem_free(kernel_map, (vm_offset_t)allocations_ptr, z_alloc_size);
}
if (traces_ptr != NULL) {
kmem_free(kernel_map, (vm_offset_t)traces_ptr, z_trace_size);
}
return retval;
}
static boolean_t
zleak_log(uintptr_t* bt,
uintptr_t addr,
uint32_t depth,
vm_size_t allocation_size)
{
if (!lck_spin_try_lock(&zleak_lock)) {
z_total_conflicts++;
return FALSE;
}
struct zallocation* allocation = &zallocations[hashaddr(addr, zleak_alloc_buckets)];
uint32_t trace_index = hashbacktrace(bt, depth, zleak_trace_buckets);
struct ztrace* trace = &ztraces[trace_index];
allocation->za_hit_count++;
trace->zt_hit_count++;
if (allocation->za_element != (uintptr_t) 0 && trace_index == allocation->za_trace_index) {
z_alloc_collisions++;
lck_spin_unlock(&zleak_lock);
return TRUE;
}
if (trace->zt_size > 0 && bcmp(trace->zt_stack, bt, (depth * sizeof(uintptr_t))) != 0 ) {
trace->zt_collisions++;
z_trace_collisions++;
lck_spin_unlock(&zleak_lock);
return TRUE;
} else if (trace->zt_size > 0) {
trace->zt_size += allocation_size;
} else {
if (trace->zt_depth != 0)
z_trace_overwrites++;
z_trace_recorded++;
trace->zt_size = allocation_size;
memcpy(trace->zt_stack, bt, (depth * sizeof(uintptr_t)) );
trace->zt_depth = depth;
trace->zt_collisions = 0;
}
if (allocation->za_element != (uintptr_t) 0) {
z_alloc_collisions++;
struct ztrace* associated_trace = &ztraces[allocation->za_trace_index];
associated_trace->zt_size -= allocation->za_size;
} else if (allocation->za_trace_index != 0) {
z_alloc_overwrites++;
}
allocation->za_element = addr;
allocation->za_trace_index = trace_index;
allocation->za_size = allocation_size;
z_alloc_recorded++;
if (top_ztrace->zt_size < trace->zt_size)
top_ztrace = trace;
lck_spin_unlock(&zleak_lock);
return TRUE;
}
static void
zleak_free(uintptr_t addr,
vm_size_t allocation_size)
{
if (addr == (uintptr_t) 0)
return;
struct zallocation* allocation = &zallocations[hashaddr(addr, zleak_alloc_buckets)];
if (allocation->za_element == addr && allocation->za_trace_index < zleak_trace_buckets) {
lck_spin_lock(&zleak_lock);
if (allocation->za_element == addr && allocation->za_trace_index < zleak_trace_buckets) {
struct ztrace *trace;
if (allocation->za_size != allocation_size) {
panic("Freeing as size %lu memory that was allocated with size %lu\n",
(uintptr_t)allocation_size, (uintptr_t)allocation->za_size);
}
trace = &ztraces[allocation->za_trace_index];
if (trace->zt_size > 0) {
trace->zt_size -= allocation_size;
}
allocation->za_element = 0;
}
lck_spin_unlock(&zleak_lock);
}
}
#endif
uint32_t
fastbacktrace(uintptr_t* bt, uint32_t max_frames)
{
uintptr_t* frameptr = NULL, *frameptr_next = NULL;
uintptr_t retaddr = 0;
uint32_t frame_index = 0, frames = 0;
uintptr_t kstackb, kstackt;
thread_t cthread = current_thread();
if (__improbable(cthread == NULL))
return 0;
kstackb = cthread->kernel_stack;
kstackt = kstackb + kernel_stack_size;
frameptr = __builtin_frame_address(0);
while (frameptr != NULL && frame_index < max_frames ) {
frameptr_next = (uintptr_t*) *frameptr;
if (frameptr_next == NULL)
break;
if (((uintptr_t)frameptr_next > kstackt) || ((uintptr_t)frameptr_next < kstackb))
break;
retaddr = *(frameptr + 1);
bt[frame_index++] = retaddr;
frameptr = frameptr_next;
}
frames = frame_index;
while (frame_index < max_frames)
bt[frame_index++] = 0;
return frames;
}
uintptr_t
hash_mix(uintptr_t x)
{
#ifndef __LP64__
x += ~(x << 15);
x ^= (x >> 10);
x += (x << 3 );
x ^= (x >> 6 );
x += ~(x << 11);
x ^= (x >> 16);
#else
x += ~(x << 32);
x ^= (x >> 22);
x += ~(x << 13);
x ^= (x >> 8 );
x += (x << 3 );
x ^= (x >> 15);
x += ~(x << 27);
x ^= (x >> 31);
#endif
return x;
}
uint32_t
hashbacktrace(uintptr_t* bt, uint32_t depth, uint32_t max_size)
{
uintptr_t hash = 0;
uintptr_t mask = max_size - 1;
while (depth) {
hash += bt[--depth];
}
hash = hash_mix(hash) & mask;
assert(hash < max_size);
return (uint32_t) hash;
}
uint32_t
hashaddr(uintptr_t pt, uint32_t max_size)
{
uintptr_t hash = 0;
uintptr_t mask = max_size - 1;
hash = hash_mix(pt) & mask;
assert(hash < max_size);
return (uint32_t) hash;
}
#pragma mark -
zone_t
zinit(
vm_size_t size,
vm_size_t max,
vm_size_t alloc,
const char *name)
{
zone_t z;
if (zone_zone == ZONE_NULL) {
z = (struct zone *)zdata;
zdata += sizeof(*z);
zdata_size -= sizeof(*z);
} else
z = (zone_t) zalloc(zone_zone);
if (z == ZONE_NULL)
return(ZONE_NULL);
if (size < sizeof(z->free_elements))
size = sizeof(z->free_elements);
size = ((size-1) + sizeof(z->free_elements)) -
((size-1) % sizeof(z->free_elements));
if (alloc == 0)
alloc = PAGE_SIZE;
alloc = round_page(alloc);
max = round_page(max);
#if ZONE_ALIAS_ADDR
if ((size < PAGE_SIZE) && (PAGE_SIZE % size <= PAGE_SIZE / 10))
alloc = PAGE_SIZE;
else
#endif
#if defined(__LP64__)
if (((alloc % size) != 0) || (alloc > PAGE_SIZE * 8))
#endif
{
vm_size_t best, waste; unsigned int i;
best = PAGE_SIZE;
waste = best % size;
for (i = 1; i <= 5; i++) {
vm_size_t tsize, twaste;
tsize = i * PAGE_SIZE;
if ((tsize % size) < (tsize / 100)) {
alloc = tsize;
goto use_this_allocation;
}
twaste = tsize % size;
if (twaste < waste)
best = tsize, waste = twaste;
}
if (alloc <= best || (alloc % size >= waste))
alloc = best;
}
use_this_allocation:
if (max && (max < alloc))
max = alloc;
z->free_elements = 0;
z->cur_size = 0;
z->max_size = max;
z->elem_size = size;
z->alloc_size = alloc;
z->zone_name = name;
z->count = 0;
z->sum_count = 0LL;
z->doing_alloc = FALSE;
z->doing_gc = FALSE;
z->exhaustible = FALSE;
z->collectable = TRUE;
z->allows_foreign = FALSE;
z->expandable = TRUE;
z->waiting = FALSE;
z->async_pending = FALSE;
z->caller_acct = TRUE;
z->noencrypt = FALSE;
z->no_callout = FALSE;
z->async_prio_refill = FALSE;
z->gzalloc_exempt = FALSE;
z->alignment_required = FALSE;
z->prio_refill_watermark = 0;
z->zone_replenish_thread = NULL;
#if CONFIG_ZLEAKS
z->num_allocs = 0;
z->num_frees = 0;
z->zleak_capture = 0;
z->zleak_on = FALSE;
#endif
#if ZONE_DEBUG
z->active_zones.next = z->active_zones.prev = NULL;
zone_debug_enable(z);
#endif
lock_zone_init(z);
z->next_zone = ZONE_NULL;
thread_call_setup(&z->call_async_alloc, zalloc_async, z);
simple_lock(&all_zones_lock);
*last_zone = z;
last_zone = &z->next_zone;
z->index = num_zones;
if (zinfo_per_task) {
if (num_zones > ZONES_MAX)
z->index = ZONES_MAX;
}
num_zones++;
simple_unlock(&all_zones_lock);
if (log_this_zone(z->zone_name, zone_name_to_log)) {
zone_of_interest = z;
}
if (zone_of_interest != NULL && zrecords == NULL && zlog_ready) {
if (kmem_alloc(kernel_map, (vm_offset_t *)&zrecords, log_records * sizeof(struct zrecord)) == KERN_SUCCESS) {
bzero((void *)zrecords, log_records * sizeof(struct zrecord));
printf("zone: logging started for zone %s (%p)\n", zone_of_interest->zone_name, zone_of_interest);
} else {
printf("zone: couldn't allocate memory for zrecords, turning off zleak logging\n");
zone_of_interest = NULL;
}
}
#if CONFIG_GZALLOC
gzalloc_zone_init(z);
#endif
return(z);
}
unsigned zone_replenish_loops, zone_replenish_wakeups, zone_replenish_wakeups_initiated;
static void zone_replenish_thread(zone_t);
static void zone_replenish_thread(zone_t z) {
vm_size_t free_size;
current_thread()->options |= TH_OPT_VMPRIV;
for (;;) {
lock_zone(z);
assert(z->prio_refill_watermark != 0);
while ((free_size = (z->cur_size - (z->count * z->elem_size))) < (z->prio_refill_watermark * z->elem_size)) {
assert(z->doing_alloc == FALSE);
assert(z->async_prio_refill == TRUE);
unlock_zone(z);
int zflags = KMA_KOBJECT|KMA_NOPAGEWAIT;
vm_offset_t space, alloc_size;
kern_return_t kr;
if (vm_pool_low())
alloc_size = round_page(z->elem_size);
else
alloc_size = z->alloc_size;
if (z->noencrypt)
zflags |= KMA_NOENCRYPT;
kr = kernel_memory_allocate(zone_map, &space, alloc_size, 0, zflags);
if (kr == KERN_SUCCESS) {
#if ZONE_ALIAS_ADDR
if (alloc_size == PAGE_SIZE)
space = zone_alias_addr(space);
#endif
zcram(z, space, alloc_size);
} else if (kr == KERN_RESOURCE_SHORTAGE) {
VM_PAGE_WAIT();
} else if (kr == KERN_NO_SPACE) {
kr = kernel_memory_allocate(kernel_map, &space, alloc_size, 0, zflags);
if (kr == KERN_SUCCESS) {
#if ZONE_ALIAS_ADDR
if (alloc_size == PAGE_SIZE)
space = zone_alias_addr(space);
#endif
zcram(z, space, alloc_size);
} else {
assert_wait_timeout(&z->zone_replenish_thread, THREAD_UNINT, 1, 100 * NSEC_PER_USEC);
thread_block(THREAD_CONTINUE_NULL);
}
}
lock_zone(z);
zone_replenish_loops++;
}
unlock_zone(z);
assert_wait(&z->zone_replenish_thread, THREAD_UNINT);
thread_block(THREAD_CONTINUE_NULL);
zone_replenish_wakeups++;
}
}
void
zone_prio_refill_configure(zone_t z, vm_size_t low_water_mark) {
z->prio_refill_watermark = low_water_mark;
z->async_prio_refill = TRUE;
OSMemoryBarrier();
kern_return_t tres = kernel_thread_start_priority((thread_continue_t)zone_replenish_thread, z, MAXPRI_KERNEL, &z->zone_replenish_thread);
if (tres != KERN_SUCCESS) {
panic("zone_prio_refill_configure, thread create: 0x%x", tres);
}
thread_deallocate(z->zone_replenish_thread);
}
void
zcram(
zone_t zone,
vm_offset_t newmem,
vm_size_t size)
{
vm_size_t elem_size;
boolean_t from_zm = FALSE;
assert(zone != ZONE_NULL && newmem != (vm_offset_t)0);
assert(!zone->collectable || zone->allows_foreign
|| (from_zone_map(newmem, size)));
elem_size = zone->elem_size;
if (from_zone_map(newmem, size))
from_zm = TRUE;
if (from_zm)
zone_page_init(newmem, size);
lock_zone(zone);
while (size >= elem_size) {
free_to_zone(zone, (void *) newmem);
if (from_zm)
zone_page_alloc(newmem, elem_size);
zone->count++;
size -= elem_size;
newmem += elem_size;
zone->cur_size += elem_size;
}
unlock_zone(zone);
}
void
zone_steal_memory(void)
{
#if CONFIG_GZALLOC
gzalloc_configure();
#endif
zdata_size = 12 * sizeof(struct zone);
zdata = (vm_offset_t)pmap_steal_memory(round_page(zdata_size));
}
int
zfill(
zone_t zone,
int nelem)
{
kern_return_t kr;
vm_size_t size;
vm_offset_t memory;
int nalloc;
assert(nelem > 0);
if (nelem <= 0)
return 0;
size = nelem * zone->elem_size;
size = round_page(size);
kr = kmem_alloc_kobject(kernel_map, &memory, size);
if (kr != KERN_SUCCESS)
return 0;
zone_change(zone, Z_FOREIGN, TRUE);
zcram(zone, memory, size);
nalloc = (int)(size / zone->elem_size);
assert(nalloc >= nelem);
return nalloc;
}
void
zone_bootstrap(void)
{
char temp_buf[16];
if (PE_parse_boot_argn("-zinfop", temp_buf, sizeof(temp_buf))) {
zinfo_per_task = TRUE;
}
if (PE_parse_boot_argn("-zc", temp_buf, sizeof(temp_buf))) {
corruption_debug_flag = TRUE;
}
free_check_sample_factor = ZP_DEFAULT_SAMPLING_FACTOR;
if (PE_parse_boot_argn("-zp", temp_buf, sizeof(temp_buf))) {
free_check_sample_factor = 1;
}
if (PE_parse_boot_argn("-no-zp", temp_buf, sizeof(temp_buf))) {
free_check_sample_factor = 0;
}
if (PE_parse_boot_argn("zp-factor", &free_check_sample_factor, sizeof(free_check_sample_factor))) {
printf("Zone poisoning factor override:%u\n", free_check_sample_factor);
}
if (PE_parse_boot_argn("zlog", zone_name_to_log, sizeof(zone_name_to_log)) == TRUE) {
if (PE_parse_boot_argn("zrecs", &log_records, sizeof(log_records)) == TRUE) {
log_records = MIN(ZRECORDS_MAX, log_records);
} else {
log_records = ZRECORDS_DEFAULT;
}
}
simple_lock_init(&all_zones_lock, 0);
first_zone = ZONE_NULL;
last_zone = &first_zone;
num_zones = 0;
assert(zone_zone == ZONE_NULL);
zone_zone = zinit(sizeof(struct zone), 128 * sizeof(struct zone),
sizeof(struct zone), "zones");
zone_change(zone_zone, Z_COLLECT, FALSE);
zone_change(zone_zone, Z_CALLERACCT, FALSE);
zone_change(zone_zone, Z_NOENCRYPT, TRUE);
zcram(zone_zone, zdata, zdata_size);
if (zinfo_per_task) {
vm_size_t zisize = sizeof(zinfo_usage_store_t) * ZINFO_SLOTS;
unsigned int i;
for (i = 0; i < num_fake_zones; i++)
fake_zones[i].init(ZINFO_SLOTS - num_fake_zones + i);
zinfo_zone = zinit(zisize, zisize * CONFIG_TASK_MAX,
zisize, "per task zinfo");
zone_change(zinfo_zone, Z_CALLERACCT, FALSE);
}
}
void
zinfo_task_init(task_t task)
{
if (zinfo_per_task) {
task->tkm_zinfo = zalloc(zinfo_zone);
memset(task->tkm_zinfo, 0, sizeof(zinfo_usage_store_t) * ZINFO_SLOTS);
} else {
task->tkm_zinfo = NULL;
}
}
void
zinfo_task_free(task_t task)
{
assert(task != kernel_task);
if (task->tkm_zinfo != NULL) {
zfree(zinfo_zone, task->tkm_zinfo);
task->tkm_zinfo = NULL;
}
}
void
zone_init(
vm_size_t max_zonemap_size)
{
kern_return_t retval;
vm_offset_t zone_min;
vm_offset_t zone_max;
retval = kmem_suballoc(kernel_map, &zone_min, max_zonemap_size,
FALSE, VM_FLAGS_ANYWHERE | VM_FLAGS_PERMANENT,
&zone_map);
if (retval != KERN_SUCCESS)
panic("zone_init: kmem_suballoc failed");
zone_max = zone_min + round_page(max_zonemap_size);
#if CONFIG_GZALLOC
gzalloc_init(max_zonemap_size);
#endif
zone_map_min_address = zone_min;
zone_map_max_address = zone_max;
zone_pages = (unsigned int)atop_kernel(zone_max - zone_min);
zone_page_table_used_size = sizeof(zone_page_table);
zone_page_table_second_level_size = 1;
zone_page_table_second_level_shift_amount = 0;
while ((zone_page_table_first_level_slot(zone_pages-1)) >= ZONE_PAGE_TABLE_FIRST_LEVEL_SIZE) {
zone_page_table_second_level_size <<= 1;
zone_page_table_second_level_shift_amount++;
}
lck_grp_attr_setdefault(&zone_lck_grp_attr);
lck_grp_init(&zone_lck_grp, "zones", &zone_lck_grp_attr);
lck_attr_setdefault(&zone_lck_attr);
lck_mtx_init_ext(&zone_gc_lock, &zone_lck_ext, &zone_lck_grp, &zone_lck_attr);
#if CONFIG_ZLEAKS
zleak_init(max_zonemap_size);
#endif
}
void
zone_page_table_expand(zone_page_index_t pindex)
{
unsigned int first_index;
struct zone_page_table_entry * volatile * first_level_ptr;
assert(pindex < zone_pages);
first_index = zone_page_table_first_level_slot(pindex);
first_level_ptr = &zone_page_table[first_index];
if (*first_level_ptr == NULL) {
vm_offset_t second_level_array = 0;
vm_size_t second_level_size = round_page(zone_page_table_second_level_size * sizeof(struct zone_page_table_entry));
zone_page_index_t i;
struct zone_page_table_entry *entry_array;
if (kmem_alloc_kobject(zone_map, &second_level_array,
second_level_size) != KERN_SUCCESS) {
panic("zone_page_table_expand");
}
entry_array = (struct zone_page_table_entry *)second_level_array;
for (i=0; i < zone_page_table_second_level_size; i++) {
entry_array[i].alloc_count = ZONE_PAGE_UNUSED;
entry_array[i].collect_count = 0;
}
if (OSCompareAndSwapPtr(NULL, entry_array, first_level_ptr)) {
OSAddAtomicLong(second_level_size, &zone_page_table_used_size);
} else {
kmem_free(zone_map, second_level_array, second_level_size);
}
} else {
}
}
struct zone_page_table_entry *
zone_page_table_lookup(zone_page_index_t pindex)
{
unsigned int first_index = zone_page_table_first_level_slot(pindex);
struct zone_page_table_entry *second_level = zone_page_table[first_index];
if (second_level) {
return &second_level[zone_page_table_second_level_slot(pindex)];
}
return NULL;
}
extern volatile SInt32 kfree_nop_count;
#pragma mark -
#pragma mark zalloc_canblock
void *
zalloc_canblock(
register zone_t zone,
boolean_t canblock)
{
vm_offset_t addr = 0;
kern_return_t retval;
uintptr_t zbt[MAX_ZTRACE_DEPTH];
int numsaved = 0;
int i;
boolean_t zone_replenish_wakeup = FALSE;
boolean_t did_gzalloc;
did_gzalloc = FALSE;
#if CONFIG_ZLEAKS
uint32_t zleak_tracedepth = 0;
#endif
assert(zone != ZONE_NULL);
#if CONFIG_GZALLOC
addr = gzalloc_alloc(zone, canblock);
did_gzalloc = (addr != 0);
#endif
lock_zone(zone);
if (DO_LOGGING(zone))
numsaved = OSBacktrace((void*) zbt, MAX_ZTRACE_DEPTH);
#if CONFIG_ZLEAKS
if (zone->zleak_on && (zone->zleak_capture++ % zleak_sample_factor == 0)) {
zone->zleak_capture = 1;
if (numsaved == 0 )
zleak_tracedepth = fastbacktrace(zbt, MAX_ZTRACE_DEPTH);
else
zleak_tracedepth = numsaved;
}
#endif
if (__probable(addr == 0))
alloc_from_zone(zone, (void **) &addr);
if (zone->async_prio_refill &&
((zone->cur_size - (zone->count * zone->elem_size)) <
(zone->prio_refill_watermark * zone->elem_size))) {
zone_replenish_wakeup = TRUE;
zone_replenish_wakeups_initiated++;
}
while ((addr == 0) && canblock) {
if (zone->doing_alloc) {
zone->waiting = TRUE;
zone_sleep(zone);
} else if (zone->doing_gc) {
zone->waiting = TRUE;
zone_sleep(zone);
} else {
vm_offset_t space;
vm_size_t alloc_size;
int retry = 0;
if ((zone->cur_size + zone->elem_size) >
zone->max_size) {
if (zone->exhaustible)
break;
if (zone->expandable) {
zone->max_size += (zone->max_size >> 1);
} else {
unlock_zone(zone);
panic_include_zprint = TRUE;
#if CONFIG_ZLEAKS
if (zleak_state & ZLEAK_STATE_ACTIVE)
panic_include_ztrace = TRUE;
#endif
panic("zalloc: zone \"%s\" empty.", zone->zone_name);
}
}
zone->doing_alloc = TRUE;
unlock_zone(zone);
for (;;) {
int zflags = KMA_KOBJECT|KMA_NOPAGEWAIT;
if (vm_pool_low() || retry >= 1)
alloc_size =
round_page(zone->elem_size);
else
alloc_size = zone->alloc_size;
if (zone->noencrypt)
zflags |= KMA_NOENCRYPT;
retval = kernel_memory_allocate(zone_map, &space, alloc_size, 0, zflags);
if (retval == KERN_SUCCESS) {
#if ZONE_ALIAS_ADDR
if (alloc_size == PAGE_SIZE)
space = zone_alias_addr(space);
#endif
#if CONFIG_ZLEAKS
if ((zleak_state & (ZLEAK_STATE_ENABLED | ZLEAK_STATE_ACTIVE)) == ZLEAK_STATE_ENABLED) {
if (zone_map->size >= zleak_global_tracking_threshold) {
kern_return_t kr;
kr = zleak_activate();
if (kr != KERN_SUCCESS) {
printf("Failed to activate live zone leak debugging (%d).\n", kr);
}
}
}
if ((zleak_state & ZLEAK_STATE_ACTIVE) && !(zone->zleak_on)) {
if (zone->cur_size > zleak_per_zone_tracking_threshold) {
zone->zleak_on = TRUE;
}
}
#endif
zcram(zone, space, alloc_size);
break;
} else if (retval != KERN_RESOURCE_SHORTAGE) {
retry++;
if (retry == 2) {
zone_gc(TRUE);
printf("zalloc did gc\n");
zone_display_zprint();
}
if (retry == 3) {
panic_include_zprint = TRUE;
#if CONFIG_ZLEAKS
if ((zleak_state & ZLEAK_STATE_ACTIVE)) {
panic_include_ztrace = TRUE;
}
#endif
panic("zalloc: \"%s\" (%d elements) retry fail %d, kfree_nop_count: %d", zone->zone_name, zone->count, retval, (int)kfree_nop_count);
}
} else {
break;
}
}
lock_zone(zone);
zone->doing_alloc = FALSE;
if (zone->waiting) {
zone->waiting = FALSE;
zone_wakeup(zone);
}
alloc_from_zone(zone, (void **) &addr);
if (addr == 0 &&
retval == KERN_RESOURCE_SHORTAGE) {
unlock_zone(zone);
VM_PAGE_WAIT();
lock_zone(zone);
}
}
if (addr == 0)
alloc_from_zone(zone, (void **) &addr);
}
#if CONFIG_ZLEAKS
if (addr && zleak_tracedepth > 0) {
if (!zleak_log(zbt, addr, zleak_tracedepth, zone->elem_size)) {
zone->zleak_capture = zleak_sample_factor;
}
}
#endif
if (DO_LOGGING(zone) && addr) {
if (!corruption_debug_flag && zrecords[zcurrent].z_element && zrecorded < log_records) {
for (i = zcurrent; i < log_records; i++) {
if (zrecords[i].z_element == NULL) {
zcurrent = i;
goto empty_slot;
}
}
for (i = 0; i < zcurrent; i++) {
if (zrecords[i].z_element == NULL) {
zcurrent = i;
goto empty_slot;
}
}
}
empty_slot:
if (zrecords[zcurrent].z_element == NULL)
zrecorded++;
zrecords[zcurrent].z_element = (void *)addr;
zrecords[zcurrent].z_time = ztime++;
zrecords[zcurrent].z_opcode = ZOP_ALLOC;
for (i = 0; i < numsaved; i++)
zrecords[zcurrent].z_pc[i] = (void*) zbt[i];
for (; i < MAX_ZTRACE_DEPTH; i++)
zrecords[zcurrent].z_pc[i] = 0;
zcurrent++;
if (zcurrent >= log_records)
zcurrent = 0;
}
if ((addr == 0) && !canblock && (zone->async_pending == FALSE) && (zone->no_callout == FALSE) && (zone->exhaustible == FALSE) && (!vm_pool_low())) {
zone->async_pending = TRUE;
unlock_zone(zone);
thread_call_enter(&zone->call_async_alloc);
lock_zone(zone);
alloc_from_zone(zone, (void **) &addr);
}
#if ZONE_DEBUG
if (!did_gzalloc && addr && zone_debug_enabled(zone)) {
enqueue_tail(&zone->active_zones, (queue_entry_t)addr);
addr += ZONE_DEBUG_OFFSET;
}
#endif
#if CONFIG_ZLEAKS
if (addr != 0) {
zone->num_allocs++;
}
#endif
unlock_zone(zone);
if (zone_replenish_wakeup)
thread_wakeup(&zone->zone_replenish_thread);
TRACE_MACHLEAKS(ZALLOC_CODE, ZALLOC_CODE_2, zone->elem_size, addr);
if (addr) {
thread_t thr = current_thread();
task_t task;
zinfo_usage_t zinfo;
vm_size_t sz = zone->elem_size;
if (zone->caller_acct)
ledger_credit(thr->t_ledger, task_ledgers.tkm_private, sz);
else
ledger_credit(thr->t_ledger, task_ledgers.tkm_shared, sz);
if ((task = thr->task) != NULL && (zinfo = task->tkm_zinfo) != NULL)
OSAddAtomic64(sz, (int64_t *)&zinfo[zone->index].alloc);
}
return((void *)addr);
}
void *
zalloc(
register zone_t zone)
{
return( zalloc_canblock(zone, TRUE) );
}
void *
zalloc_noblock(
register zone_t zone)
{
return( zalloc_canblock(zone, FALSE) );
}
void
zalloc_async(
thread_call_param_t p0,
__unused thread_call_param_t p1)
{
void *elt;
elt = zalloc_canblock((zone_t)p0, TRUE);
zfree((zone_t)p0, elt);
lock_zone(((zone_t)p0));
((zone_t)p0)->async_pending = FALSE;
unlock_zone(((zone_t)p0));
}
void *
zget(
register zone_t zone)
{
vm_offset_t addr;
#if CONFIG_ZLEAKS
uintptr_t zbt[MAX_ZTRACE_DEPTH];
uint32_t zleak_tracedepth = 0;
#endif
assert( zone != ZONE_NULL );
if (!lock_try_zone(zone))
return NULL;
#if CONFIG_ZLEAKS
if (zone->zleak_on && (zone->zleak_capture++ % zleak_sample_factor == 0)) {
zone->zleak_capture = 1;
zleak_tracedepth = fastbacktrace(zbt, MAX_ZTRACE_DEPTH);
}
#endif
alloc_from_zone(zone, (void **) &addr);
#if ZONE_DEBUG
if (addr && zone_debug_enabled(zone)) {
enqueue_tail(&zone->active_zones, (queue_entry_t)addr);
addr += ZONE_DEBUG_OFFSET;
}
#endif
#if CONFIG_ZLEAKS
if (zone->zleak_on && zleak_tracedepth > 0 && addr) {
if (!zleak_log(zbt, addr, zleak_tracedepth, zone->elem_size)) {
zone->zleak_capture = zleak_sample_factor;
}
}
if (addr != 0) {
zone->num_allocs++;
}
#endif
unlock_zone(zone);
return((void *) addr);
}
boolean_t zone_check = FALSE;
static zone_t zone_last_bogus_zone = ZONE_NULL;
static vm_offset_t zone_last_bogus_elem = 0;
void
zfree(
register zone_t zone,
void *addr)
{
vm_offset_t elem = (vm_offset_t) addr;
void *zbt[MAX_ZTRACE_DEPTH];
int numsaved = 0;
boolean_t gzfreed = FALSE;
assert(zone != ZONE_NULL);
if (DO_LOGGING(zone))
numsaved = OSBacktrace(&zbt[0], MAX_ZTRACE_DEPTH);
#if MACH_ASSERT
if (zone == ZONE_NULL || elem == (vm_offset_t)0)
panic("zfree: NULL");
if (zone == zone_zone)
panic("zfree: freeing to zone_zone breaks zone_gc!");
#endif
#if CONFIG_GZALLOC
gzfreed = gzalloc_free(zone, addr);
#endif
TRACE_MACHLEAKS(ZFREE_CODE, ZFREE_CODE_2, zone->elem_size, (uintptr_t)addr);
if (__improbable(!gzfreed && zone->collectable && !zone->allows_foreign &&
!from_zone_map(elem, zone->elem_size))) {
#if MACH_ASSERT
panic("zfree: non-allocated memory in collectable zone!");
#endif
zone_last_bogus_zone = zone;
zone_last_bogus_elem = elem;
return;
}
lock_zone(zone);
if (DO_LOGGING(zone)) {
int i;
if (corruption_debug_flag) {
if (zrecords[zcurrent].z_element == NULL)
zrecorded++;
zrecords[zcurrent].z_element = (void *)addr;
zrecords[zcurrent].z_time = ztime++;
zrecords[zcurrent].z_opcode = ZOP_FREE;
for (i = 0; i < numsaved; i++)
zrecords[zcurrent].z_pc[i] = zbt[i];
for (; i < MAX_ZTRACE_DEPTH; i++)
zrecords[zcurrent].z_pc[i] = 0;
zcurrent++;
if (zcurrent >= log_records)
zcurrent = 0;
} else {
for (i = 0; i < log_records; i++) {
if (zrecords[i].z_element == addr) {
zrecords[i].z_element = NULL;
zcurrent = i;
zrecorded--;
break;
}
}
}
}
#if ZONE_DEBUG
if (!gzfreed && zone_debug_enabled(zone)) {
queue_t tmp_elem;
elem -= ZONE_DEBUG_OFFSET;
if (zone_check) {
for (tmp_elem = queue_first(&zone->active_zones);
!queue_end(tmp_elem, &zone->active_zones);
tmp_elem = queue_next(tmp_elem))
if (elem == (vm_offset_t)tmp_elem)
break;
if (elem != (vm_offset_t)tmp_elem)
panic("zfree()ing element from wrong zone");
}
remqueue((queue_t) elem);
}
#endif
if (zone_check) {
vm_offset_t this;
for (this = zone->free_elements;
this != 0;
this = * (vm_offset_t *) this)
if (!pmap_kernel_va(this) || this == elem)
panic("zfree");
}
if (__probable(!gzfreed))
free_to_zone(zone, (void *) elem);
#if MACH_ASSERT
if (zone->count < 0)
panic("zfree: count < 0!");
#endif
#if CONFIG_ZLEAKS
zone->num_frees++;
if (zone->zleak_on) {
zleak_free(elem, zone->elem_size);
}
#endif
if (zone->elem_size >= PAGE_SIZE &&
vm_pool_low()){
zone_gc_forced = TRUE;
}
unlock_zone(zone);
{
thread_t thr = current_thread();
task_t task;
zinfo_usage_t zinfo;
vm_size_t sz = zone->elem_size;
if (zone->caller_acct)
ledger_debit(thr->t_ledger, task_ledgers.tkm_private, sz);
else
ledger_debit(thr->t_ledger, task_ledgers.tkm_shared, sz);
if ((task = thr->task) != NULL && (zinfo = task->tkm_zinfo) != NULL)
OSAddAtomic64(sz, (int64_t *)&zinfo[zone->index].free);
}
}
void
zone_change(
zone_t zone,
unsigned int item,
boolean_t value)
{
assert( zone != ZONE_NULL );
assert( value == TRUE || value == FALSE );
switch(item){
case Z_NOENCRYPT:
zone->noencrypt = value;
break;
case Z_EXHAUST:
zone->exhaustible = value;
break;
case Z_COLLECT:
zone->collectable = value;
break;
case Z_EXPAND:
zone->expandable = value;
break;
case Z_FOREIGN:
zone->allows_foreign = value;
break;
case Z_CALLERACCT:
zone->caller_acct = value;
break;
case Z_NOCALLOUT:
zone->no_callout = value;
break;
case Z_GZALLOC_EXEMPT:
zone->gzalloc_exempt = value;
#if CONFIG_GZALLOC
gzalloc_reconfigure(zone);
#endif
break;
case Z_ALIGNMENT_REQUIRED:
zone->alignment_required = value;
#if ZONE_DEBUG
zone_debug_disable(zone);
#endif
#if CONFIG_GZALLOC
gzalloc_reconfigure(zone);
#endif
break;
default:
panic("Zone_change: Wrong Item Type!");
}
}
integer_t
zone_free_count(zone_t zone)
{
integer_t free_count;
lock_zone(zone);
free_count = (integer_t)(zone->cur_size/zone->elem_size - zone->count);
unlock_zone(zone);
assert(free_count >= 0);
return(free_count);
}
boolean_t
zone_page_collectable(
vm_offset_t addr,
vm_size_t size)
{
struct zone_page_table_entry *zp;
zone_page_index_t i, j;
#if ZONE_ALIAS_ADDR
addr = zone_virtual_addr(addr);
#endif
#if MACH_ASSERT
if (!from_zone_map(addr, size))
panic("zone_page_collectable");
#endif
i = (zone_page_index_t)atop_kernel(addr-zone_map_min_address);
j = (zone_page_index_t)atop_kernel((addr+size-1) - zone_map_min_address);
for (; i <= j; i++) {
zp = zone_page_table_lookup(i);
if (zp->collect_count == zp->alloc_count)
return (TRUE);
}
return (FALSE);
}
void
zone_page_keep(
vm_offset_t addr,
vm_size_t size)
{
struct zone_page_table_entry *zp;
zone_page_index_t i, j;
#if ZONE_ALIAS_ADDR
addr = zone_virtual_addr(addr);
#endif
#if MACH_ASSERT
if (!from_zone_map(addr, size))
panic("zone_page_keep");
#endif
i = (zone_page_index_t)atop_kernel(addr-zone_map_min_address);
j = (zone_page_index_t)atop_kernel((addr+size-1) - zone_map_min_address);
for (; i <= j; i++) {
zp = zone_page_table_lookup(i);
zp->collect_count = 0;
}
}
void
zone_page_collect(
vm_offset_t addr,
vm_size_t size)
{
struct zone_page_table_entry *zp;
zone_page_index_t i, j;
#if ZONE_ALIAS_ADDR
addr = zone_virtual_addr(addr);
#endif
#if MACH_ASSERT
if (!from_zone_map(addr, size))
panic("zone_page_collect");
#endif
i = (zone_page_index_t)atop_kernel(addr-zone_map_min_address);
j = (zone_page_index_t)atop_kernel((addr+size-1) - zone_map_min_address);
for (; i <= j; i++) {
zp = zone_page_table_lookup(i);
++zp->collect_count;
}
}
void
zone_page_init(
vm_offset_t addr,
vm_size_t size)
{
struct zone_page_table_entry *zp;
zone_page_index_t i, j;
#if ZONE_ALIAS_ADDR
addr = zone_virtual_addr(addr);
#endif
#if MACH_ASSERT
if (!from_zone_map(addr, size))
panic("zone_page_init");
#endif
i = (zone_page_index_t)atop_kernel(addr-zone_map_min_address);
j = (zone_page_index_t)atop_kernel((addr+size-1) - zone_map_min_address);
for (; i <= j; i++) {
zone_page_table_expand(i);
zp = zone_page_table_lookup(i);
assert(zp);
zp->alloc_count = ZONE_PAGE_UNUSED;
zp->collect_count = 0;
}
}
void
zone_page_alloc(
vm_offset_t addr,
vm_size_t size)
{
struct zone_page_table_entry *zp;
zone_page_index_t i, j;
#if ZONE_ALIAS_ADDR
addr = zone_virtual_addr(addr);
#endif
#if MACH_ASSERT
if (!from_zone_map(addr, size))
panic("zone_page_alloc");
#endif
i = (zone_page_index_t)atop_kernel(addr-zone_map_min_address);
j = (zone_page_index_t)atop_kernel((addr+size-1) - zone_map_min_address);
for (; i <= j; i++) {
zp = zone_page_table_lookup(i);
assert(zp);
if (zp->alloc_count == ZONE_PAGE_UNUSED)
zp->alloc_count = ZONE_PAGE_USED;
++zp->alloc_count;
}
}
void
zone_page_free_element(
zone_page_index_t *free_page_head,
zone_page_index_t *free_page_tail,
vm_offset_t addr,
vm_size_t size)
{
struct zone_page_table_entry *zp;
zone_page_index_t i, j;
#if ZONE_ALIAS_ADDR
addr = zone_virtual_addr(addr);
#endif
#if MACH_ASSERT
if (!from_zone_map(addr, size))
panic("zone_page_free_element");
#endif
i = (zone_page_index_t)atop_kernel(addr-zone_map_min_address);
j = (zone_page_index_t)atop_kernel((addr+size-1) - zone_map_min_address);
for (; i <= j; i++) {
zp = zone_page_table_lookup(i);
if (zp->collect_count > 0)
--zp->collect_count;
if (--zp->alloc_count == 0) {
vm_address_t free_page_address;
vm_address_t prev_free_page_address;
zp->alloc_count = ZONE_PAGE_UNUSED;
zp->collect_count = 0;
free_page_address = zone_map_min_address + PAGE_SIZE * ((vm_size_t)i);
*(zone_page_index_t *)free_page_address = ZONE_PAGE_INDEX_INVALID;
if (*free_page_head == ZONE_PAGE_INDEX_INVALID) {
*free_page_head = i;
*free_page_tail = i;
} else {
prev_free_page_address = zone_map_min_address + PAGE_SIZE * ((vm_size_t)(*free_page_tail));
*(zone_page_index_t *)prev_free_page_address = i;
*free_page_tail = i;
}
}
}
}
struct zone_free_element {
struct zone_free_element * next;
};
#define ADD_LIST_TO_ZONE(zone, base, tail) \
MACRO_BEGIN \
(tail)->next = (void *)((zone)->free_elements); \
if ((zone)->elem_size >= (2 * sizeof(vm_offset_t) + sizeof(uint32_t))) { \
((vm_offset_t *)(tail))[((zone)->elem_size/sizeof(vm_offset_t))-1] = \
(zone)->free_elements; \
} \
(zone)->free_elements = (unsigned long)(base); \
MACRO_END
#define ADD_ELEMENT(zone, prev, elem) \
MACRO_BEGIN \
(prev)->next = (elem); \
if ((zone)->elem_size >= (2 * sizeof(vm_offset_t) + sizeof(uint32_t))) { \
((vm_offset_t *)(prev))[((zone)->elem_size/sizeof(vm_offset_t))-1] = \
(vm_offset_t)(elem); \
} \
MACRO_END
struct {
uint32_t pgs_freed;
uint32_t elems_collected,
elems_freed,
elems_kept;
} zgc_stats;
void
zone_gc(boolean_t all_zones)
{
unsigned int max_zones;
zone_t z;
unsigned int i;
zone_page_index_t zone_free_page_head;
zone_page_index_t zone_free_page_tail;
thread_t mythread = current_thread();
lck_mtx_lock(&zone_gc_lock);
simple_lock(&all_zones_lock);
max_zones = num_zones;
z = first_zone;
simple_unlock(&all_zones_lock);
thread_set_eager_preempt(mythread);
#if MACH_ASSERT
for (i = 0; i < zone_pages; i++) {
struct zone_page_table_entry *zp;
zp = zone_page_table_lookup(i);
assert(!zp || (zp->collect_count == 0));
}
#endif
for (i = 0; i < max_zones; i++, z = z->next_zone) {
unsigned int n, m;
vm_size_t elt_size, size_freed;
struct zone_free_element *elt, *base_elt, *base_prev, *prev, *scan, *keep, *tail;
int kmem_frees = 0;
assert(z != ZONE_NULL);
if (!z->collectable)
continue;
if (all_zones == FALSE && z->elem_size < PAGE_SIZE)
continue;
lock_zone(z);
elt_size = z->elem_size;
if ((elt_size & PAGE_MASK) &&
(((z->cur_size - z->count * elt_size) <= (2 * z->alloc_size)) ||
((z->cur_size - z->count * elt_size) <= (z->cur_size / 10)))) {
unlock_zone(z);
continue;
}
z->doing_gc = TRUE;
scan = (void *)z->free_elements;
z->free_elements = 0;
unlock_zone(z);
prev = (void *)&scan;
elt = scan;
n = 0; tail = keep = NULL;
zone_free_page_head = ZONE_PAGE_INDEX_INVALID;
zone_free_page_tail = ZONE_PAGE_INDEX_INVALID;
while (elt != NULL) {
if (from_zone_map(elt, elt_size)) {
zone_page_collect((vm_offset_t)elt, elt_size);
prev = elt;
elt = elt->next;
++zgc_stats.elems_collected;
}
else {
if (keep == NULL)
keep = tail = elt;
else {
ADD_ELEMENT(z, tail, elt);
tail = elt;
}
ADD_ELEMENT(z, prev, elt->next);
elt = elt->next;
ADD_ELEMENT(z, tail, NULL);
}
if (++n >= 50) {
if (z->waiting == TRUE) {
lock_zone(z);
if (keep != NULL) {
ADD_LIST_TO_ZONE(z, keep, tail);
tail = keep = NULL;
} else {
m =0;
base_elt = elt;
base_prev = prev;
while ((elt != NULL) && (++m < 50)) {
prev = elt;
elt = elt->next;
}
if (m !=0 ) {
ADD_LIST_TO_ZONE(z, base_elt, prev);
ADD_ELEMENT(z, base_prev, elt);
prev = base_prev;
}
}
if (z->waiting) {
z->waiting = FALSE;
zone_wakeup(z);
}
unlock_zone(z);
}
n =0;
}
}
if (keep != NULL) {
lock_zone(z);
ADD_LIST_TO_ZONE(z, keep, tail);
if (z->waiting) {
z->waiting = FALSE;
zone_wakeup(z);
}
unlock_zone(z);
}
size_freed = 0;
elt = scan;
n = 0; tail = keep = NULL;
while (elt != NULL) {
if (zone_page_collectable((vm_offset_t)elt, elt_size)) {
struct zone_free_element *next_elt = elt->next;
size_freed += elt_size;
zone_page_free_element(&zone_free_page_head, &zone_free_page_tail, (vm_offset_t)elt, elt_size);
elt = next_elt;
++zgc_stats.elems_freed;
}
else {
zone_page_keep((vm_offset_t)elt, elt_size);
if (keep == NULL)
keep = tail = elt;
else {
ADD_ELEMENT(z, tail, elt);
tail = elt;
}
elt = elt->next;
ADD_ELEMENT(z, tail, NULL);
++zgc_stats.elems_kept;
}
if (++n >= 50) {
lock_zone(z);
z->cur_size -= size_freed;
size_freed = 0;
if (keep != NULL) {
ADD_LIST_TO_ZONE(z, keep, tail);
}
if (z->waiting) {
z->waiting = FALSE;
zone_wakeup(z);
}
unlock_zone(z);
n = 0; tail = keep = NULL;
}
}
lock_zone(z);
if (size_freed > 0 || keep != NULL) {
z->cur_size -= size_freed;
if (keep != NULL) {
ADD_LIST_TO_ZONE(z, keep, tail);
}
}
z->doing_gc = FALSE;
if (z->waiting) {
z->waiting = FALSE;
zone_wakeup(z);
}
unlock_zone(z);
if (zone_free_page_head == ZONE_PAGE_INDEX_INVALID)
continue;
thread_clear_eager_preempt(mythread);
while (zone_free_page_head != ZONE_PAGE_INDEX_INVALID) {
zone_page_index_t zind = zone_free_page_head;
vm_address_t free_page_address;
int page_count;
free_page_address = zone_map_min_address + PAGE_SIZE * ((vm_size_t)zind);
zone_free_page_head = *(zone_page_index_t *)free_page_address;
page_count = 1;
while (zone_free_page_head != ZONE_PAGE_INDEX_INVALID) {
zone_page_index_t next_zind = zone_free_page_head;
vm_address_t next_free_page_address;
next_free_page_address = zone_map_min_address + PAGE_SIZE * ((vm_size_t)next_zind);
if (next_free_page_address == (free_page_address - PAGE_SIZE)) {
free_page_address = next_free_page_address;
} else if (next_free_page_address != (free_page_address + (PAGE_SIZE * page_count)))
break;
zone_free_page_head = *(zone_page_index_t *)next_free_page_address;
page_count++;
}
kmem_free(zone_map, free_page_address, page_count * PAGE_SIZE);
zgc_stats.pgs_freed += page_count;
if (++kmem_frees == 32) {
thread_yield_internal(1);
kmem_frees = 0;
}
}
thread_set_eager_preempt(mythread);
}
thread_clear_eager_preempt(mythread);
lck_mtx_unlock(&zone_gc_lock);
}
extern vm_offset_t kmapoff_kaddr;
extern unsigned int kmapoff_pgcnt;
void
consider_zone_gc(boolean_t force)
{
boolean_t all_zones = FALSE;
if (kmapoff_kaddr != 0) {
(void) vm_deallocate(kernel_map,
kmapoff_kaddr, kmapoff_pgcnt * PAGE_SIZE_64);
kmapoff_kaddr = 0;
}
if (zone_gc_allowed &&
(zone_gc_allowed_by_time_throttle ||
zone_gc_forced ||
force)) {
if (zone_gc_allowed_by_time_throttle == TRUE) {
zone_gc_allowed_by_time_throttle = FALSE;
all_zones = TRUE;
}
zone_gc_forced = FALSE;
zone_gc(all_zones);
}
}
void
compute_zone_gc_throttle(void *arg __unused)
{
zone_gc_allowed_by_time_throttle = TRUE;
}
#if CONFIG_TASK_ZONE_INFO
kern_return_t
task_zone_info(
task_t task,
mach_zone_name_array_t *namesp,
mach_msg_type_number_t *namesCntp,
task_zone_info_array_t *infop,
mach_msg_type_number_t *infoCntp)
{
mach_zone_name_t *names;
vm_offset_t names_addr;
vm_size_t names_size;
task_zone_info_t *info;
vm_offset_t info_addr;
vm_size_t info_size;
unsigned int max_zones, i;
zone_t z;
mach_zone_name_t *zn;
task_zone_info_t *zi;
kern_return_t kr;
vm_size_t used;
vm_map_copy_t copy;
if (task == TASK_NULL)
return KERN_INVALID_TASK;
simple_lock(&all_zones_lock);
max_zones = (unsigned int)(num_zones + num_fake_zones);
z = first_zone;
simple_unlock(&all_zones_lock);
names_size = round_page(max_zones * sizeof *names);
kr = kmem_alloc_pageable(ipc_kernel_map,
&names_addr, names_size);
if (kr != KERN_SUCCESS)
return kr;
names = (mach_zone_name_t *) names_addr;
info_size = round_page(max_zones * sizeof *info);
kr = kmem_alloc_pageable(ipc_kernel_map,
&info_addr, info_size);
if (kr != KERN_SUCCESS) {
kmem_free(ipc_kernel_map,
names_addr, names_size);
return kr;
}
info = (task_zone_info_t *) info_addr;
zn = &names[0];
zi = &info[0];
for (i = 0; i < max_zones - num_fake_zones; i++) {
struct zone zcopy;
assert(z != ZONE_NULL);
lock_zone(z);
zcopy = *z;
unlock_zone(z);
simple_lock(&all_zones_lock);
z = z->next_zone;
simple_unlock(&all_zones_lock);
(void) strncpy(zn->mzn_name, zcopy.zone_name,
sizeof zn->mzn_name);
zn->mzn_name[sizeof zn->mzn_name - 1] = '\0';
zi->tzi_count = (uint64_t)zcopy.count;
zi->tzi_cur_size = (uint64_t)zcopy.cur_size;
zi->tzi_max_size = (uint64_t)zcopy.max_size;
zi->tzi_elem_size = (uint64_t)zcopy.elem_size;
zi->tzi_alloc_size = (uint64_t)zcopy.alloc_size;
zi->tzi_sum_size = zcopy.sum_count * zcopy.elem_size;
zi->tzi_exhaustible = (uint64_t)zcopy.exhaustible;
zi->tzi_collectable = (uint64_t)zcopy.collectable;
zi->tzi_caller_acct = (uint64_t)zcopy.caller_acct;
if (task->tkm_zinfo != NULL) {
zi->tzi_task_alloc = task->tkm_zinfo[zcopy.index].alloc;
zi->tzi_task_free = task->tkm_zinfo[zcopy.index].free;
} else {
zi->tzi_task_alloc = 0;
zi->tzi_task_free = 0;
}
zn++;
zi++;
}
for (i = 0; i < num_fake_zones; i++) {
int count, collectable, exhaustible, caller_acct, index;
vm_size_t cur_size, max_size, elem_size, alloc_size;
uint64_t sum_size;
strncpy(zn->mzn_name, fake_zones[i].name, sizeof zn->mzn_name);
zn->mzn_name[sizeof zn->mzn_name - 1] = '\0';
fake_zones[i].query(&count, &cur_size,
&max_size, &elem_size,
&alloc_size, &sum_size,
&collectable, &exhaustible, &caller_acct);
zi->tzi_count = (uint64_t)count;
zi->tzi_cur_size = (uint64_t)cur_size;
zi->tzi_max_size = (uint64_t)max_size;
zi->tzi_elem_size = (uint64_t)elem_size;
zi->tzi_alloc_size = (uint64_t)alloc_size;
zi->tzi_sum_size = sum_size;
zi->tzi_collectable = (uint64_t)collectable;
zi->tzi_exhaustible = (uint64_t)exhaustible;
zi->tzi_caller_acct = (uint64_t)caller_acct;
if (task->tkm_zinfo != NULL) {
index = ZINFO_SLOTS - num_fake_zones + i;
zi->tzi_task_alloc = task->tkm_zinfo[index].alloc;
zi->tzi_task_free = task->tkm_zinfo[index].free;
} else {
zi->tzi_task_alloc = 0;
zi->tzi_task_free = 0;
}
zn++;
zi++;
}
used = max_zones * sizeof *names;
if (used != names_size)
bzero((char *) (names_addr + used), names_size - used);
kr = vm_map_copyin(ipc_kernel_map, (vm_map_address_t)names_addr,
(vm_map_size_t)names_size, TRUE, ©);
assert(kr == KERN_SUCCESS);
*namesp = (mach_zone_name_t *) copy;
*namesCntp = max_zones;
used = max_zones * sizeof *info;
if (used != info_size)
bzero((char *) (info_addr + used), info_size - used);
kr = vm_map_copyin(ipc_kernel_map, (vm_map_address_t)info_addr,
(vm_map_size_t)info_size, TRUE, ©);
assert(kr == KERN_SUCCESS);
*infop = (task_zone_info_t *) copy;
*infoCntp = max_zones;
return KERN_SUCCESS;
}
#else
kern_return_t
task_zone_info(
__unused task_t task,
__unused mach_zone_name_array_t *namesp,
__unused mach_msg_type_number_t *namesCntp,
__unused task_zone_info_array_t *infop,
__unused mach_msg_type_number_t *infoCntp)
{
return KERN_FAILURE;
}
#endif
kern_return_t
mach_zone_info(
host_priv_t host,
mach_zone_name_array_t *namesp,
mach_msg_type_number_t *namesCntp,
mach_zone_info_array_t *infop,
mach_msg_type_number_t *infoCntp)
{
mach_zone_name_t *names;
vm_offset_t names_addr;
vm_size_t names_size;
mach_zone_info_t *info;
vm_offset_t info_addr;
vm_size_t info_size;
unsigned int max_zones, i;
zone_t z;
mach_zone_name_t *zn;
mach_zone_info_t *zi;
kern_return_t kr;
vm_size_t used;
vm_map_copy_t copy;
if (host == HOST_NULL)
return KERN_INVALID_HOST;
#if CONFIG_DEBUGGER_FOR_ZONE_INFO
if (!PE_i_can_has_debugger(NULL))
return KERN_INVALID_HOST;
#endif
simple_lock(&all_zones_lock);
max_zones = (unsigned int)(num_zones + num_fake_zones);
z = first_zone;
simple_unlock(&all_zones_lock);
names_size = round_page(max_zones * sizeof *names);
kr = kmem_alloc_pageable(ipc_kernel_map,
&names_addr, names_size);
if (kr != KERN_SUCCESS)
return kr;
names = (mach_zone_name_t *) names_addr;
info_size = round_page(max_zones * sizeof *info);
kr = kmem_alloc_pageable(ipc_kernel_map,
&info_addr, info_size);
if (kr != KERN_SUCCESS) {
kmem_free(ipc_kernel_map,
names_addr, names_size);
return kr;
}
info = (mach_zone_info_t *) info_addr;
zn = &names[0];
zi = &info[0];
for (i = 0; i < max_zones - num_fake_zones; i++) {
struct zone zcopy;
assert(z != ZONE_NULL);
lock_zone(z);
zcopy = *z;
unlock_zone(z);
simple_lock(&all_zones_lock);
z = z->next_zone;
simple_unlock(&all_zones_lock);
(void) strncpy(zn->mzn_name, zcopy.zone_name,
sizeof zn->mzn_name);
zn->mzn_name[sizeof zn->mzn_name - 1] = '\0';
zi->mzi_count = (uint64_t)zcopy.count;
zi->mzi_cur_size = (uint64_t)zcopy.cur_size;
zi->mzi_max_size = (uint64_t)zcopy.max_size;
zi->mzi_elem_size = (uint64_t)zcopy.elem_size;
zi->mzi_alloc_size = (uint64_t)zcopy.alloc_size;
zi->mzi_sum_size = zcopy.sum_count * zcopy.elem_size;
zi->mzi_exhaustible = (uint64_t)zcopy.exhaustible;
zi->mzi_collectable = (uint64_t)zcopy.collectable;
zn++;
zi++;
}
for (i = 0; i < num_fake_zones; i++) {
int count, collectable, exhaustible, caller_acct;
vm_size_t cur_size, max_size, elem_size, alloc_size;
uint64_t sum_size;
strncpy(zn->mzn_name, fake_zones[i].name, sizeof zn->mzn_name);
zn->mzn_name[sizeof zn->mzn_name - 1] = '\0';
fake_zones[i].query(&count, &cur_size,
&max_size, &elem_size,
&alloc_size, &sum_size,
&collectable, &exhaustible, &caller_acct);
zi->mzi_count = (uint64_t)count;
zi->mzi_cur_size = (uint64_t)cur_size;
zi->mzi_max_size = (uint64_t)max_size;
zi->mzi_elem_size = (uint64_t)elem_size;
zi->mzi_alloc_size = (uint64_t)alloc_size;
zi->mzi_sum_size = sum_size;
zi->mzi_collectable = (uint64_t)collectable;
zi->mzi_exhaustible = (uint64_t)exhaustible;
zn++;
zi++;
}
used = max_zones * sizeof *names;
if (used != names_size)
bzero((char *) (names_addr + used), names_size - used);
kr = vm_map_copyin(ipc_kernel_map, (vm_map_address_t)names_addr,
(vm_map_size_t)names_size, TRUE, ©);
assert(kr == KERN_SUCCESS);
*namesp = (mach_zone_name_t *) copy;
*namesCntp = max_zones;
used = max_zones * sizeof *info;
if (used != info_size)
bzero((char *) (info_addr + used), info_size - used);
kr = vm_map_copyin(ipc_kernel_map, (vm_map_address_t)info_addr,
(vm_map_size_t)info_size, TRUE, ©);
assert(kr == KERN_SUCCESS);
*infop = (mach_zone_info_t *) copy;
*infoCntp = max_zones;
return KERN_SUCCESS;
}
kern_return_t
host_zone_info(
host_priv_t host,
zone_name_array_t *namesp,
mach_msg_type_number_t *namesCntp,
zone_info_array_t *infop,
mach_msg_type_number_t *infoCntp)
{
zone_name_t *names;
vm_offset_t names_addr;
vm_size_t names_size;
zone_info_t *info;
vm_offset_t info_addr;
vm_size_t info_size;
unsigned int max_zones, i;
zone_t z;
zone_name_t *zn;
zone_info_t *zi;
kern_return_t kr;
vm_size_t used;
vm_map_copy_t copy;
if (host == HOST_NULL)
return KERN_INVALID_HOST;
#if CONFIG_DEBUGGER_FOR_ZONE_INFO
if (!PE_i_can_has_debugger(NULL))
return KERN_INVALID_HOST;
#endif
#if defined(__LP64__)
if (!thread_is_64bit(current_thread()))
return KERN_NOT_SUPPORTED;
#else
if (thread_is_64bit(current_thread()))
return KERN_NOT_SUPPORTED;
#endif
simple_lock(&all_zones_lock);
max_zones = (unsigned int)(num_zones + num_fake_zones);
z = first_zone;
simple_unlock(&all_zones_lock);
names_size = round_page(max_zones * sizeof *names);
kr = kmem_alloc_pageable(ipc_kernel_map,
&names_addr, names_size);
if (kr != KERN_SUCCESS)
return kr;
names = (zone_name_t *) names_addr;
info_size = round_page(max_zones * sizeof *info);
kr = kmem_alloc_pageable(ipc_kernel_map,
&info_addr, info_size);
if (kr != KERN_SUCCESS) {
kmem_free(ipc_kernel_map,
names_addr, names_size);
return kr;
}
info = (zone_info_t *) info_addr;
zn = &names[0];
zi = &info[0];
for (i = 0; i < max_zones - num_fake_zones; i++) {
struct zone zcopy;
assert(z != ZONE_NULL);
lock_zone(z);
zcopy = *z;
unlock_zone(z);
simple_lock(&all_zones_lock);
z = z->next_zone;
simple_unlock(&all_zones_lock);
(void) strncpy(zn->zn_name, zcopy.zone_name,
sizeof zn->zn_name);
zn->zn_name[sizeof zn->zn_name - 1] = '\0';
zi->zi_count = zcopy.count;
zi->zi_cur_size = zcopy.cur_size;
zi->zi_max_size = zcopy.max_size;
zi->zi_elem_size = zcopy.elem_size;
zi->zi_alloc_size = zcopy.alloc_size;
zi->zi_exhaustible = zcopy.exhaustible;
zi->zi_collectable = zcopy.collectable;
zn++;
zi++;
}
for (i = 0; i < num_fake_zones; i++) {
int caller_acct;
uint64_t sum_space;
strncpy(zn->zn_name, fake_zones[i].name, sizeof zn->zn_name);
zn->zn_name[sizeof zn->zn_name - 1] = '\0';
fake_zones[i].query(&zi->zi_count, &zi->zi_cur_size,
&zi->zi_max_size, &zi->zi_elem_size,
&zi->zi_alloc_size, &sum_space,
&zi->zi_collectable, &zi->zi_exhaustible, &caller_acct);
zn++;
zi++;
}
used = max_zones * sizeof *names;
if (used != names_size)
bzero((char *) (names_addr + used), names_size - used);
kr = vm_map_copyin(ipc_kernel_map, (vm_map_address_t)names_addr,
(vm_map_size_t)names_size, TRUE, ©);
assert(kr == KERN_SUCCESS);
*namesp = (zone_name_t *) copy;
*namesCntp = max_zones;
used = max_zones * sizeof *info;
if (used != info_size)
bzero((char *) (info_addr + used), info_size - used);
kr = vm_map_copyin(ipc_kernel_map, (vm_map_address_t)info_addr,
(vm_map_size_t)info_size, TRUE, ©);
assert(kr == KERN_SUCCESS);
*infop = (zone_info_t *) copy;
*infoCntp = max_zones;
return KERN_SUCCESS;
}
kern_return_t
mach_zone_force_gc(
host_t host)
{
if (host == HOST_NULL)
return KERN_INVALID_HOST;
consider_zone_gc(TRUE);
return (KERN_SUCCESS);
}
extern unsigned int stack_total;
extern unsigned long long stack_allocs;
#if defined(__i386__) || defined (__x86_64__)
extern unsigned int inuse_ptepages_count;
extern long long alloc_ptepages_count;
#endif
void zone_display_zprint()
{
unsigned int i;
zone_t the_zone;
if(first_zone!=NULL) {
the_zone = first_zone;
for (i = 0; i < num_zones; i++) {
if(the_zone->cur_size > (1024*1024)) {
printf("%.20s:\t%lu\n",the_zone->zone_name,(uintptr_t)the_zone->cur_size);
}
if(the_zone->next_zone == NULL) {
break;
}
the_zone = the_zone->next_zone;
}
}
printf("Kernel Stacks:\t%lu\n",(uintptr_t)(kernel_stack_size * stack_total));
#if defined(__i386__) || defined (__x86_64__)
printf("PageTables:\t%lu\n",(uintptr_t)(PAGE_SIZE * inuse_ptepages_count));
#endif
printf("Kalloc.Large:\t%lu\n",(uintptr_t)kalloc_large_total);
}
#if ZONE_DEBUG
#define zone_in_use(z) ( z->count || z->free_elements )
void
zone_debug_enable(
zone_t z)
{
if (zone_debug_enabled(z) || zone_in_use(z) ||
z->alloc_size < (z->elem_size + ZONE_DEBUG_OFFSET))
return;
queue_init(&z->active_zones);
z->elem_size += ZONE_DEBUG_OFFSET;
}
void
zone_debug_disable(
zone_t z)
{
if (!zone_debug_enabled(z) || zone_in_use(z))
return;
z->elem_size -= ZONE_DEBUG_OFFSET;
z->active_zones.next = z->active_zones.prev = NULL;
}
#endif