#define __POSIX_LIB__
#import <stdlib.h>
#import <stdio.h>
#import <string.h>
#import <unistd.h>
#import <objc/zone.h>
#import <pthread_internals.h> // for spin lock
#import <objc/malloc.h>
#include <crt_externs.h>
#import "scalable_malloc.h"
#import "stack_logging.h"
#define USE_SLEEP_RATHER_THAN_ABORT 0
#define MAX_ALLOCATION 0xc0000000 // beyond this, assume a programming error
#define INITIAL_ZONES 8 // After this number, we reallocate for new zones
typedef void (malloc_logger_t)(unsigned type, unsigned arg1, unsigned arg2, unsigned arg3, unsigned result, unsigned num_hot_frames_to_skip);
static pthread_lock_t _malloc_lock;
static malloc_zone_t *initial_malloc_zones[INITIAL_ZONES] = {0};
unsigned malloc_num_zones = 0;
malloc_zone_t **malloc_zones = initial_malloc_zones;
malloc_logger_t *malloc_logger = NULL;
unsigned malloc_debug_flags = 0;
unsigned malloc_check_start = 0; unsigned malloc_check_counter = 0;
unsigned malloc_check_each = 1000;
#define MALLOC_LOCK() LOCK(_malloc_lock)
#define MALLOC_UNLOCK() UNLOCK(_malloc_lock)
#define MALLOC_LOG_TYPE_ALLOCATE stack_logging_type_alloc
#define MALLOC_LOG_TYPE_DEALLOCATE stack_logging_type_dealloc
#define MALLOC_LOG_TYPE_HAS_ZONE stack_logging_flag_zone
#define MALLOC_LOG_TYPE_CLEARED stack_logging_flag_cleared
static inline malloc_zone_t *find_registered_zone(const void *ptr, size_t *returned_size) {
unsigned index = malloc_num_zones;
malloc_zone_t **zones = malloc_zones;
while (index--) {
malloc_zone_t *zone = *zones++;
size_t size;
size = zone->size(zone, ptr);
if (size) {
if (returned_size) *returned_size = size;
return zone;
}
}
return NULL;
}
static void _malloc_initialize(void) {
(void)malloc_create_zone(0, 0);
malloc_set_zone_name(malloc_zones[0], "DefaultMallocZone");
LOCK_INIT(_malloc_lock);
}
static inline malloc_zone_t *inline_malloc_default_zone(void) {
if (!malloc_num_zones) _malloc_initialize();
return malloc_zones[0];
}
malloc_zone_t *malloc_default_zone(void) {
return inline_malloc_default_zone();
}
static void set_flags_from_environment(void) {
const char *flag;
if (getenv("MallocGuardEdges")) {
malloc_debug_flags = SCALABLE_MALLOC_ADD_GUARD_PAGES;
malloc_printf("malloc[%d]: protecting edges\n", getpid());
if (getenv("MallocDoNotProtectPrelude")) {
malloc_debug_flags |= SCALABLE_MALLOC_DONT_PROTECT_PRELUDE;
malloc_printf("malloc[%d]: ... but not protecting prelude guard page\n", getpid());
}
if (getenv("MallocDoNotProtectPostlude")) {
malloc_debug_flags |= SCALABLE_MALLOC_DONT_PROTECT_POSTLUDE;
malloc_printf("malloc[%d]: ... but not protecting postlude guard page\n", getpid());
}
}
flag = getenv("MallocStackLogging");
if (!flag) {
flag = getenv("MallocStackLoggingNoCompact");
stack_logging_dontcompact = 1;
}
if (flag) {
unsigned val = strtoul(flag, NULL, 0);
if (val == 1) val = 0;
if (val == -1) val = 0;
malloc_logger = (val) ? (void *)val : stack_logging_log_stack;
stack_logging_enable_logging = 1;
if (malloc_logger == stack_logging_log_stack) {
malloc_printf("malloc[%d]: recording stacks using standard recorder\n", getpid());
} else {
malloc_printf("malloc[%d]: recording stacks using recorder %p\n", getpid(), malloc_logger);
}
if (stack_logging_dontcompact) malloc_printf("malloc[%d]: stack logging compaction turned off; VM can increase rapidly\n", getpid());
}
if (getenv("MallocScribble")) {
malloc_debug_flags |= SCALABLE_MALLOC_DO_SCRIBBLE;
malloc_printf("malloc[%d]: enabling scribbling to detect mods to free blocks\n", getpid());
}
flag = getenv("MallocCheckHeapStart");
if (flag) {
malloc_check_start = strtoul(flag, NULL, 0);
if (malloc_check_start == 0) malloc_check_start = 1;
if (malloc_check_start == -1) malloc_check_start = 1;
flag = getenv("MallocCheckHeapEach");
if (flag) {
malloc_check_each = strtoul(flag, NULL, 0);
if (malloc_check_each == 0) malloc_check_each = 1;
if (malloc_check_each == -1) malloc_check_each = 1;
}
malloc_printf("malloc[%d]: checks heap after %dth operation and each %d operations\n", getpid(), malloc_check_start, malloc_check_each);
}
if (getenv("MallocHelp")) {
malloc_printf(
"malloc[%d]: environment variables that can be set for debug:\n"
"- MallocGuardEdges to add 2 guard pages for each large block\n"
"- MallocDoNotProtectPrelude to disable protection (when previous flag set)\n"
"- MallocDoNotProtectPostlude to disable protection (when previous flag set)\n"
"- MallocStackLogging to record all stacks. Tools like leaks can then be applied\n"
"- MallocStackLoggingNoCompact to record all stacks. Needed for malloc_history\n"
"- MallocScribble to detect writing on free blocks: 0x55 is written upon free\n"
"- MallocCheckHeapStart <n> to check the heap from time to time after <n> operations \n"
"- MallocHelp - this help!\n", getpid());
}
}
malloc_zone_t *malloc_create_zone(vm_size_t start_size, unsigned flags) {
malloc_zone_t *zone;
if (!malloc_num_zones) {
char **env = * _NSGetEnviron();
char **p;
char *c;
for (p = env; (c = *p) != NULL; ++p) {
if (!strncmp(c, "Malloc", 6)) {
set_flags_from_environment();
break;
}
}
}
zone = create_scalable_zone(start_size, malloc_debug_flags);
malloc_zone_register(zone);
return zone;
}
void malloc_destroy_zone(malloc_zone_t *zone) {
malloc_zone_unregister(zone);
zone->destroy(zone);
}
static void internal_check(void) {
static vm_address_t *frames = NULL;
static unsigned num_frames;
if (malloc_zone_check(NULL)) {
malloc_printf("MallocCheckHeap: PASSED check at %dth operation\n", malloc_check_counter-1);
if (!frames) vm_allocate(mach_task_self(), (void *)&frames, vm_page_size, 1);
thread_stack_pcs(frames, vm_page_size/sizeof(vm_address_t) - 1, &num_frames);
} else {
malloc_printf("*** MallocCheckHeap: FAILED check at %dth operation\n", malloc_check_counter-1);
if (frames) {
unsigned index = 1;
malloc_printf("Stack for last operation where the malloc check succeeded: ");
while (index < num_frames) malloc_printf("0x%x ", frames[index++]);
malloc_printf("\n(Use 'atos' for a symbolic stack)\n");
}
if (malloc_check_each > 1) {
unsigned recomm_each = (malloc_check_each > 10) ? malloc_check_each/10 : 1;
unsigned recomm_start = (malloc_check_counter > malloc_check_each+1) ? malloc_check_counter-1-malloc_check_each : 1;
malloc_printf("*** Recommend using 'setenv MallocCheckHeapStart %d; setenv MallocCheckHeapEach %d' to narrow down failure\n", recomm_start, recomm_each);
}
malloc_printf("*** Sleeping for 100 seconds to leave time to attach\n");
sleep(100);
}
malloc_check_start += malloc_check_each;
}
void *malloc_zone_malloc(malloc_zone_t *zone, size_t size) {
void *ptr;
if ((unsigned)size >= MAX_ALLOCATION) {
fprintf(stderr, "*** malloc_zone_malloc[%d]: argument too large: %d\n", getpid(), (unsigned)size);
return NULL;
}
if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
ptr = zone->malloc(zone, size);
if (malloc_logger) malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (unsigned)zone, size, 0, (unsigned)ptr, 0);
return ptr;
}
void *malloc_zone_calloc(malloc_zone_t *zone, size_t num_items, size_t size) {
void *ptr;
if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
if (((unsigned)num_items >= MAX_ALLOCATION) || ((unsigned)size >= MAX_ALLOCATION) || ((long long)size * num_items >= (long long) MAX_ALLOCATION)) {
fprintf(stderr, "*** malloc_zone_calloc[%d]: arguments too large: %d,%d\n", getpid(), (unsigned)num_items, (unsigned)size);
return NULL;
}
ptr = zone->calloc(zone, num_items, size);
if (malloc_logger) malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE | MALLOC_LOG_TYPE_CLEARED, (unsigned)zone, num_items * size, 0, (unsigned)ptr, 0);
return ptr;
}
void *malloc_zone_valloc(malloc_zone_t *zone, size_t size) {
void *ptr;
if ((unsigned)size >= MAX_ALLOCATION) {
fprintf(stderr, "*** malloc_zone_valloc[%d]: argument too large: %d\n", getpid(), (unsigned)size);
return NULL;
}
if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
ptr = zone->valloc(zone, size);
if (malloc_logger) malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (unsigned)zone, size, 0, (unsigned)ptr, 0);
return ptr;
}
void *malloc_zone_realloc(malloc_zone_t *zone, void *ptr, size_t size) {
void *new_ptr;
if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
new_ptr = zone->realloc(zone, ptr, size);
if (malloc_logger) malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (unsigned)zone, (unsigned)ptr, size, (unsigned)new_ptr, 0);
return new_ptr;
}
void malloc_zone_free(malloc_zone_t *zone, void *ptr) {
if (malloc_logger) malloc_logger(MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (unsigned)zone, (unsigned)ptr, 0, 0, 0);
if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
zone->free(zone, ptr);
}
malloc_zone_t *malloc_zone_from_ptr(const void *ptr) {
malloc_zone_t *zone;
if (!ptr) return NULL;
zone = find_registered_zone(ptr, NULL);
return zone;
}
void malloc_zone_register(malloc_zone_t *zone) {
MALLOC_LOCK();
if (malloc_num_zones >= INITIAL_ZONES) {
malloc_zone_t **zones = malloc_zones;
malloc_zone_t *pzone = malloc_zones[0];
boolean_t copy = malloc_num_zones == INITIAL_ZONES;
if (copy) zones = NULL; MALLOC_UNLOCK();
zones = pzone->realloc(pzone, zones, (malloc_num_zones + 1) * sizeof(malloc_zone_t *)); MALLOC_LOCK();
if (copy) memcpy(zones, malloc_zones, malloc_num_zones * sizeof(malloc_zone_t *));
malloc_zones = zones;
}
malloc_zones[malloc_num_zones] = zone;
malloc_num_zones++; MALLOC_UNLOCK();
}
void malloc_zone_unregister(malloc_zone_t *z) {
unsigned index;
MALLOC_LOCK();
index = malloc_num_zones;
while (index--) {
malloc_zone_t *zone = malloc_zones[index];
if (zone == z) {
malloc_zones[index] = malloc_zones[--malloc_num_zones];
MALLOC_UNLOCK();
return;
}
}
MALLOC_UNLOCK();
fprintf(stderr, "*** malloc[%d]: malloc_zone_unregister() failed for %p\n", getpid(), z);
}
void malloc_set_zone_name(malloc_zone_t *z, const char *name) {
char *newName;
if (z->zone_name) {
free((char *)z->zone_name);
z->zone_name = NULL;
}
newName = malloc_zone_malloc(z, strlen(name) + 1);
strcpy(newName, name);
z->zone_name = (const char *)newName;
}
const char *malloc_get_zone_name(malloc_zone_t *zone) {
return zone->zone_name;
}
static char *_malloc_append_unsigned(unsigned value, unsigned base, char *head) {
if (!value) {
head[0] = '0';
} else {
if (value >= base) head = _malloc_append_unsigned(value / base, base, head);
value = value % base;
head[0] = (value < 10) ? '0' + value : 'a' + value - 10;
}
return head+1;
}
void malloc_printf(const char *format, ...) {
va_list args;
char buf[1024];
char *head = buf;
char ch;
unsigned *nums;
va_start(args, format);
#if LOG_THREAD
head = _malloc_append_unsigned(((unsigned)&args) >> 12, 16, head);
*head++ = ' ';
#endif
nums = args;
while (ch = *format++) {
if (ch == '%') {
ch = *format++;
if (ch == 's') {
char *str = (char *)(*nums++);
write(2, buf, head - buf);
head = buf;
write(2, str, strlen(str));
} else {
if (ch == 'p') {
*head++ = '0'; *head++ = 'x';
}
head = _malloc_append_unsigned(*nums++, (ch == 'd') ? 10 : 16, head);
}
} else {
*head++ = ch;
}
}
write(2, buf, head - buf); fflush(stderr);
va_end(args);
}
void *malloc(size_t size) {
return malloc_zone_malloc(inline_malloc_default_zone(), size);
}
void *calloc(size_t num_items, size_t size) {
return malloc_zone_calloc(inline_malloc_default_zone(), num_items, size);
}
void free(void *ptr) {
malloc_zone_t *zone;
if (!ptr) return;
zone = find_registered_zone(ptr, NULL);
if (zone) {
malloc_zone_free(zone, ptr);
} else {
fprintf(stderr, "*** malloc[%d]: Deallocation of a pointer not malloced: %p; This could be a double free(), or free() called with the middle of an allocated block; Try setting environment variable MallocHelp to see tools to help debug\n", getpid(), ptr);
}
}
void *realloc(void *old_ptr, size_t new_size) {
malloc_zone_t *zone;
size_t old_size = 0;
if (!old_ptr) return malloc_zone_malloc(inline_malloc_default_zone(), new_size);
zone = find_registered_zone(old_ptr, &old_size);
if (zone && (old_size >= new_size)) return old_ptr;
if (!zone) zone = inline_malloc_default_zone();
return malloc_zone_realloc(zone, old_ptr, new_size);
}
void *valloc(size_t size) {
malloc_zone_t *zone = inline_malloc_default_zone();
return malloc_zone_valloc(zone, size);
}
extern void vfree(void *ptr) {
free(ptr);
}
size_t malloc_size(const void *ptr) {
size_t size = 0;
if (!ptr) return size;
(void)find_registered_zone(ptr, &size);
return size;
}
size_t malloc_good_size (size_t size) {
malloc_zone_t *zone = inline_malloc_default_zone();
return zone->introspect->good_size(zone, size);
}
static kern_return_t _malloc_default_reader(task_t task, vm_address_t address, vm_size_t size, void **ptr) {
*ptr = (void *)address;
return 0;
}
kern_return_t malloc_get_all_zones(task_t task, memory_reader_t reader, vm_address_t **addresses, unsigned *count) {
vm_address_t remote_malloc_zones = (vm_address_t)&malloc_zones;
vm_address_t remote_malloc_num_zones = (vm_address_t)&malloc_num_zones;
kern_return_t err;
vm_address_t zones_address;
vm_address_t *zones_address_ref;
unsigned num_zones;
unsigned *num_zones_ref;
if (!reader) reader = _malloc_default_reader;
err = reader(task, remote_malloc_zones, sizeof(void *), (void **)&zones_address_ref);
if (err) {
fprintf(stderr, "*** malloc[%d]: malloc_get_all_zones: error reading zones_address at 0x%x\n", getpid(), (unsigned)remote_malloc_zones);
return err;
}
zones_address = *zones_address_ref;
err = reader(task, remote_malloc_num_zones, sizeof(unsigned), (void **)&num_zones_ref);
if (err) {
fprintf(stderr, "*** malloc[%d]: malloc_get_all_zones: error reading num_zones at 0x%x\n", getpid(), (unsigned)remote_malloc_num_zones);
return err;
}
num_zones = *num_zones_ref;
*count = num_zones;
err = reader(task, zones_address, sizeof(malloc_zone_t *) * num_zones, (void **)addresses);
if (err) {
fprintf(stderr, "*** malloc[%d]: malloc_get_all_zones: error reading zones at 0x%x\n", getpid(), (unsigned)&zones_address);
return err;
}
return err;
}
void malloc_zone_print_ptr_info(void *ptr) {
malloc_zone_t *zone;
if (!ptr) return;
zone = find_registered_zone(ptr, NULL);
if (zone) {
printf("ptr %p in registered zone %p\n", ptr, zone);
} else {
printf("ptr %p not in heap\n", ptr);
}
}
boolean_t malloc_zone_check(malloc_zone_t *zone) {
boolean_t ok = 1;
if (!zone) {
unsigned index = 0;
while (index < malloc_num_zones) {
zone = malloc_zones[index++];
if (!zone->introspect->check(zone)) ok = 0;
}
} else {
ok = zone->introspect->check(zone);
}
return ok;
}
void malloc_zone_print(malloc_zone_t *zone, boolean_t verbose) {
if (!zone) {
unsigned index = 0;
while (index < malloc_num_zones) {
zone = malloc_zones[index++];
zone->introspect->print(zone, verbose);
}
} else {
zone->introspect->print(zone, verbose);
}
}
void malloc_zone_log(malloc_zone_t *zone, void *address) {
if (!zone) {
unsigned index = 0;
while (index < malloc_num_zones) {
zone = malloc_zones[index++];
zone->introspect->log(zone, address);
}
} else {
zone->introspect->log(zone, address);
}
}
static void DefaultMallocError(int x) {
fprintf(stderr, "*** malloc[%d]: error %d\n", getpid(), x);
#if USE_SLEEP_RATHER_THAN_ABORT
sleep(3600);
#else
abort();
#endif
}
void (*malloc_error(void (*func)(int)))(int) {
return DefaultMallocError;
}
void _malloc_fork_prepare() {
unsigned index = 0;
MALLOC_LOCK();
while (index < malloc_num_zones) {
malloc_zone_t *zone = malloc_zones[index++];
zone->introspect->force_lock(zone);
}
}
void _malloc_fork_parent() {
unsigned index = 0;
MALLOC_UNLOCK();
while (index < malloc_num_zones) {
malloc_zone_t *zone = malloc_zones[index++];
zone->introspect->force_unlock(zone);
}
}
void _malloc_fork_child() {
unsigned index = 0;
MALLOC_UNLOCK();
while (index < malloc_num_zones) {
malloc_zone_t *zone = malloc_zones[index++];
zone->introspect->force_unlock(zone);
}
}
size_t mstats(void) {
malloc_zone_print(NULL, 0);
return 1;
}
#if PHASE_OUT_OLD_MALLOC
#error PHASE OUT THE FOLLOWING FUNCTIONS
#else
#warning PHASE OUT THE FOLLOWING FUNCTIONS
#endif
void set_malloc_singlethreaded(boolean_t single) {
static boolean_t warned = 0;
if (!warned) {
#if PHASE_OUT_OLD_MALLOC
fprintf(stderr, "*** malloc[%d]: OBSOLETE: set_malloc_singlethreaded(%d)\n", getpid(), single);
#endif
warned = 1;
}
}
void malloc_singlethreaded() {
static boolean_t warned = 0;
if (!warned) {
fprintf(stderr, "*** malloc[%d]: OBSOLETE: malloc_singlethreaded()\n", getpid());
warned = 1;
}
}
int malloc_debug(int level) {
fprintf(stderr, "*** malloc[%d]: OBSOLETE: malloc_debug()\n", getpid());
return 0;
}
typedef struct {
malloc_zone_t basic_zone;
vm_range_t range;
unsigned flags;
} exo_zone_t;
#define MALLOC_EXO_ZONE_SIZE_IS_OLD 1
#define MALLOC_EXO_ZONE_SIZE_IS_SCALABLE 2
typedef struct {
unsigned int lastguyfree:1;
unsigned int free:1;
unsigned int size:30;
} old_header_t;
#define THIS_FREE 0x8000 // indicates this block is free
#define PREV_FREE 0x4000 // indicates previous block is free
#define SHIFT_QUANTUM 4
static size_t exo_zone_size(exo_zone_t *zone, const void *ptr) {
if (zone->flags == MALLOC_EXO_ZONE_SIZE_IS_OLD) {
if (ptr == (void *)zone->range.address) return zone->range.size;
return ((old_header_t *)ptr)[-1].size - sizeof(old_header_t);
}
if (zone->flags == MALLOC_EXO_ZONE_SIZE_IS_SCALABLE) {
unsigned short msize_and_free = ((unsigned short *)ptr)[-1];
return (msize_and_free & THIS_FREE) ? 0 : ((msize_and_free & ~PREV_FREE) << SHIFT_QUANTUM) - sizeof(unsigned short);
}
fprintf(stderr, "*** malloc[%d]: exo_zone_size unknown flags()\n", getpid());
return 0;
}
static void *exo_zone_malloc(exo_zone_t *zone, size_t new_size) {
return malloc(new_size);
}
static void *exo_zone_calloc(exo_zone_t *zone, size_t num_items, size_t size) {
return calloc(num_items, size);
}
static void *exo_zone_valloc(exo_zone_t *zone, size_t new_size) {
return valloc(new_size);
}
static void *exo_zone_realloc(exo_zone_t *zone, void *ptr, size_t new_size) {
size_t old_size = exo_zone_size(zone, ptr);
void *new_ptr;
if (new_size <= old_size) return ptr;
new_ptr = malloc(new_size);
if (old_size) memcpy(new_ptr, ptr, old_size);
return new_ptr;
}
static void exo_zone_free(exo_zone_t *zone, void *ptr) {
}
static void exo_zone_destroy(exo_zone_t *zone) {
free(zone);
}
static kern_return_t exo_zone_noop(void) {
return 0;
}
static size_t exo_zone_good_size(exo_zone_t *zone, size_t size) {
return size;
}
static struct malloc_introspection_t exo_zone_introspect = {(void *)exo_zone_noop, (void *)exo_zone_good_size, (void *)exo_zone_noop, (void *)exo_zone_noop, (void *)exo_zone_noop, (void *)exo_zone_noop, (void *)exo_zone_noop};
static malloc_zone_t *create_exo_zone(vm_address_t start, vm_size_t size, unsigned flags) {
exo_zone_t *zone = calloc(sizeof(exo_zone_t), 1);
zone->basic_zone.size = (void *)exo_zone_size;
zone->basic_zone.malloc = (void *)exo_zone_malloc;
zone->basic_zone.calloc = (void *)exo_zone_calloc;
zone->basic_zone.valloc = (void *)exo_zone_valloc;
zone->basic_zone.free = (void *)exo_zone_free;
zone->basic_zone.realloc = (void *)exo_zone_realloc;
zone->basic_zone.destroy = (void *)exo_zone_destroy;
zone->basic_zone.introspect = &exo_zone_introspect;
zone->flags = flags;
return (malloc_zone_t *)zone;
}
#define OLD_MALLOC_VERSION 1
#define SCALABLE_MALLOC_VERSION 2
#define MAX_RANGES 1023
typedef struct {
unsigned version;
unsigned num;
vm_range_t ranges[MAX_RANGES];
} malloc_freezedry_ranges;
static void malloc_freezedry_recorder(task_t task, void *rr, unsigned type, vm_range_t *ranges, unsigned num) {
malloc_freezedry_ranges *recorded = rr;
while (num && (recorded->num < MAX_RANGES)) {
recorded->ranges[recorded->num++] = *ranges;
ranges++; num--;
}
if (recorded->num == MAX_RANGES) fprintf(stderr, "*** malloc[%d]: malloc_freezedry_recorder: exceeding capacity\n", getpid());
}
#define ADDINT(cp,i) (*((int *)cp) = i, cp += sizeof(int))
static kern_return_t default_reader(task_t task, vm_address_t address, vm_size_t size, void **ptr) {
*ptr = (void *)address;
return 0;
}
int malloc_freezedry(void) {
malloc_freezedry_ranges rr;
unsigned index = 0;
char *cp;
size_t size;
rr.version = SCALABLE_MALLOC_VERSION;
rr.num = 0;
while (index < malloc_num_zones) {
malloc_zone_t *zone = malloc_zones[index++];
zone->introspect->enumerator(mach_task_self(), &rr, MALLOC_PTR_REGION_RANGE_TYPE | MALLOC_ADMIN_REGION_RANGE_TYPE, (vm_address_t)zone, default_reader, malloc_freezedry_recorder);
}
size = sizeof(rr) - (MAX_RANGES - rr.num) * sizeof(vm_range_t);
cp = valloc(size);
memcpy(cp, (void *)&rr, size);
return (int)cp;
}
#define FETCHINT(i) (i = *((int *)cp), cp += sizeof(int))
int malloc_jumpstart(int cookie) {
char *cp = (char *)cookie;
int version, regions;
FETCHINT(version);
if ((version != OLD_MALLOC_VERSION) && (version != SCALABLE_MALLOC_VERSION)) return 1;
FETCHINT(regions);
while (--regions >= 0) {
malloc_zone_t *zone;
void **region = (void **)cp;
if (version == OLD_MALLOC_VERSION) {
cp += 3 * sizeof(void *);
zone = create_exo_zone((vm_address_t)(region[0]), (vm_size_t)(region[1] - region[0]), MALLOC_EXO_ZONE_SIZE_IS_OLD);
} else {
cp += 2 * sizeof(void *);
zone = create_exo_zone((vm_address_t)(region[0]), (vm_size_t)region[1], MALLOC_EXO_ZONE_SIZE_IS_SCALABLE);
}
malloc_zone_register(zone);
}
return 0;
}