#include <pthread_internals.h>
#include "magmallocProvider.h"
+#include <mach-o/dyld.h> /* for NSVersionOfLinkTimeLibrary() */
#import <stdlib.h>
#import <stdio.h>
#import "stack_logging.h"
#import "malloc_printf.h"
#import "_simple.h"
+#import "CrashReporterClient.h"
/*
* MALLOC_ABSOLUTE_MAX_SIZE - There are many instances of addition to a
/* The following variables are exported for the benefit of performance tools
*
* It should always be safe to first read malloc_num_zones, then read
- * malloc_zones without taking the lock, if only iteration is required
+ * malloc_zones without taking the lock, if only iteration is required and
+ * provided that when malloc_destroy_zone is called all prior operations on that
+ * zone are complete and no further calls referencing that zone can be made.
*/
unsigned malloc_num_zones = 0;
unsigned malloc_num_zones_allocated = 0;
#define MALLOC_LOCK() LOCK(_malloc_lock)
#define MALLOC_UNLOCK() UNLOCK(_malloc_lock)
+/*
+ * Counters that coordinate zone destruction (in malloc_zone_unregister) with
+ * find_registered_zone (here abbreviated as FRZ).
+ */
+static int counterAlice = 0, counterBob = 0;
+static int *pFRZCounterLive= &counterAlice, *pFRZCounterDrain = &counterBob;
+
#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
/********* Utilities ************/
+__private_extern__ uint64_t malloc_entropy[2] = {0, 0};
+
+void __malloc_entropy_setup(const char *apple[]) __attribute__ ((visibility ("hidden")));
+
+static int
+__entropy_from_kernel(const char *str)
+{
+ unsigned long long val;
+ char tmp[20], *p;
+ int idx = 0;
+
+ /* Skip over key to the first value */
+ str = strchr(str, '=');
+ if (str == NULL)
+ return 0;
+ str++;
+
+ while (str && idx < sizeof(malloc_entropy)/sizeof(malloc_entropy[0])) {
+ strlcpy(tmp, str, 20);
+ p = strchr(tmp, ',');
+ if (p) *p = '\0';
+ val = strtoull(tmp, NULL, 0);
+ malloc_entropy[idx] = (uint64_t)val;
+ idx++;
+ if ((str = strchr(str, ',')) != NULL)
+ str++;
+ }
+ return idx;
+}
+
+void
+__malloc_entropy_setup(const char *apple[])
+{
+ const char **p;
+ for (p = apple; p && *p; p++) {
+ if (strstr(*p, "malloc_entropy") == *p) {
+ if (sizeof(malloc_entropy)/sizeof(malloc_entropy[0]) == __entropy_from_kernel(*p))
+ return;
+ else
+ break;
+ }
+ }
+
+ malloc_entropy[0] = ((uint64_t)arc4random()) << 32 | ((uint64_t)arc4random());
+ malloc_entropy[1] = ((uint64_t)arc4random()) << 32 | ((uint64_t)arc4random());
+ return;
+}
static inline malloc_zone_t * find_registered_zone(const void *, size_t *) __attribute__((always_inline));
static inline malloc_zone_t *
find_registered_zone(const void *ptr, size_t *returned_size) {
// Returns a zone which contains ptr, else NULL
- unsigned index;
- malloc_zone_t **zones = malloc_zones;
+
+ if (0 == malloc_num_zones) {
+ if (returned_size) *returned_size = 0;
+ return NULL;
+ }
+
+ // The default zone is registered in malloc_zones[0]. There's no danger that it will ever be unregistered.
+ // So don't advance the FRZ counter yet.
+ malloc_zone_t *zone = malloc_zones[0];
+ size_t size = zone->size(zone, ptr);
+ if (size) { // Claimed by this zone?
+ if (returned_size) *returned_size = size;
+ return zone;
+ }
+
+ int *pFRZCounter = pFRZCounterLive; // Capture pointer to the counter of the moment
+ __sync_fetch_and_add(pFRZCounter, 1); // Advance this counter -- our thread is in FRZ
- for (index = 0; index < malloc_num_zones; ++index, ++zones) {
- malloc_zone_t *zone = *zones;
- size_t size = zone->size(zone, ptr);
+ unsigned index;
+ unsigned limit = malloc_num_zones;
+ malloc_zone_t **zones = &malloc_zones[1];
+
+ for (index = 1; index < limit; ++index, ++zones) {
+ zone = *zones;
+ size = zone->size(zone, ptr);
if (size) { // Claimed by this zone?
if (returned_size) *returned_size = size;
+ __sync_fetch_and_sub(pFRZCounter, 1); // our thread is leaving FRZ
return zone;
}
}
// Unclaimed by any zone.
if (returned_size) *returned_size = 0;
+ __sync_fetch_and_sub(pFRZCounter, 1); // our thread is leaving FRZ
return NULL;
}
/* If we don't need to reallocate zones, we need to briefly change the
* page protection the malloc zones to allow writes */
protect_size = malloc_num_zones_allocated * sizeof(malloc_zone_t *);
- vm_protect(mach_task_self(), (uintptr_t)malloc_zones, protect_size, 0, VM_PROT_READ | VM_PROT_WRITE);
+ mprotect(malloc_zones, protect_size, PROT_READ | PROT_WRITE);
}
malloc_zones[malloc_num_zones++] = zone;
/* Finally, now that the zone is registered, disallow write access to the
* malloc_zones array */
- vm_protect(mach_task_self(), (uintptr_t)malloc_zones, protect_size, 0, VM_PROT_READ);
+ mprotect(malloc_zones, protect_size, PROT_READ);
//_malloc_printf(ASL_LEVEL_INFO, "Registered malloc_zone %p in malloc_zones %p [%u zones, %u bytes]\n", zone, malloc_zones, malloc_num_zones, protect_size);
}
if (n != 0) { // make the default first, for efficiency
unsigned protect_size = malloc_num_zones_allocated * sizeof(malloc_zone_t *);
malloc_zone_t *hold = malloc_zones[0];
+
if(hold->zone_name && strcmp(hold->zone_name, "DefaultMallocZone") == 0) {
- free((void *)hold->zone_name);
- hold->zone_name = NULL;
+ malloc_set_zone_name(hold, NULL);
}
- vm_protect(mach_task_self(), (uintptr_t)malloc_zones, protect_size, 0, VM_PROT_READ | VM_PROT_WRITE);
+
+ mprotect(malloc_zones, protect_size, PROT_READ | PROT_WRITE);
malloc_zones[0] = malloc_zones[n];
malloc_zones[n] = hold;
- vm_protect(mach_task_self(), (uintptr_t)malloc_zones, protect_size, 0, VM_PROT_READ);
+ mprotect(malloc_zones, protect_size, PROT_READ);
}
// _malloc_printf(ASL_LEVEL_INFO, "%d registered zones\n", malloc_num_zones);
// _malloc_printf(ASL_LEVEL_INFO, "malloc_zones is at %p; malloc_num_zones is at %p\n", (unsigned)&malloc_zones, (unsigned)&malloc_num_zones);
return inline_malloc_default_zone();
}
+static inline malloc_zone_t *inline_malloc_default_scalable_zone(void) __attribute__((always_inline));
+static inline malloc_zone_t *
+inline_malloc_default_scalable_zone(void) {
+ unsigned index;
+
+ if (malloc_def_zone_state < 2) _malloc_initialize();
+ // _malloc_printf(ASL_LEVEL_INFO, "In inline_malloc_default_scalable_zone with %d %d\n", malloc_num_zones, malloc_has_debug_zone);
+
+ MALLOC_LOCK();
+ for (index = 0; index < malloc_num_zones; ++index) {
+ malloc_zone_t *z = malloc_zones[index];
+
+ if(z->zone_name && strcmp(z->zone_name, "DefaultMallocZone") == 0) {
+ MALLOC_UNLOCK();
+ return z;
+ }
+ }
+ MALLOC_UNLOCK();
+
+ malloc_printf("*** malloc_default_scalable_zone() failed to find 'DefaultMallocZone'\n");
+ return NULL; // FIXME: abort() instead?
+}
+
malloc_zone_t *
malloc_default_purgeable_zone(void) {
static malloc_zone_t *dpz;
if (!dpz) {
- malloc_zone_t *tmp = create_purgeable_zone(0, malloc_default_zone(), malloc_debug_flags);
+ //
+ // PR_7288598: Must pass a *scalable* zone (szone) as the helper for create_purgeable_zone().
+ // Take care that the zone so obtained is not subject to interposing.
+ //
+ malloc_zone_t *tmp = create_purgeable_zone(0, inline_malloc_default_scalable_zone(), malloc_debug_flags);
malloc_zone_register(tmp);
malloc_set_zone_name(tmp, "DefaultPurgeableMallocZone");
if (!__sync_bool_compare_and_swap(&dpz, NULL, tmp))
#if __LP64__
malloc_debug_flags = SCALABLE_MALLOC_ABORT_ON_CORRUPTION; // Set always on 64-bit processes
#else
- malloc_debug_flags = 0;
+ int libSystemVersion = NSVersionOfLinkTimeLibrary("System");
+ if ((-1 != libSystemVersion) && ((libSystemVersion >> 16) < 126) /* CFSystemVersionBarolo */)
+ malloc_debug_flags = 0;
+ else
+ malloc_debug_flags = SCALABLE_MALLOC_ABORT_ON_CORRUPTION;
#endif
stack_logging_enable_logging = 0;
stack_logging_dontcompact = 0;
}
}
if (getenv("MallocGuardEdges")) {
- malloc_debug_flags = SCALABLE_MALLOC_ADD_GUARD_PAGES;
+ malloc_debug_flags |= SCALABLE_MALLOC_ADD_GUARD_PAGES;
_malloc_printf(ASL_LEVEL_INFO, "protecting edges\n");
if (getenv("MallocDoNotProtectPrelude")) {
malloc_debug_flags |= SCALABLE_MALLOC_DONT_PROTECT_PRELUDE;
#if __LP64__
/* initialization above forces SCALABLE_MALLOC_ABORT_ON_CORRUPTION of 64-bit processes */
#else
- if (getenv("MallocCorruptionAbort")) { // Set from an environment variable in 32-bit processes
- malloc_debug_flags |= SCALABLE_MALLOC_ABORT_ON_CORRUPTION;
+ flag = getenv("MallocCorruptionAbort");
+ if (flag && (flag[0] == '0')) { // Set from an environment variable in 32-bit processes
+ malloc_debug_flags &= ~SCALABLE_MALLOC_ABORT_ON_CORRUPTION;
+ } else if (flag) {
+ malloc_debug_flags |= SCALABLE_MALLOC_ABORT_ON_CORRUPTION;
}
#endif
flag = getenv("MallocCheckHeapStart");
//
malloc_zone_t *hold = malloc_zones[0];
if(hold->zone_name && strcmp(hold->zone_name, "DefaultMallocZone") == 0) {
- free((void *)hold->zone_name);
- hold->zone_name = NULL;
+ malloc_set_zone_name(hold, NULL);
}
malloc_set_zone_name(zone, "DefaultMallocZone");
unsigned protect_size = malloc_num_zones_allocated * sizeof(malloc_zone_t *);
- vm_protect(mach_task_self(), (uintptr_t)malloc_zones, protect_size, 0, VM_PROT_READ | VM_PROT_WRITE);
+ mprotect(malloc_zones, protect_size, PROT_READ | PROT_WRITE);
// assert(zone == malloc_zones[malloc_num_zones - 1];
for (i = malloc_num_zones - 1; i > 0; --i) {
}
malloc_zones[0] = zone;
- vm_protect(mach_task_self(), (uintptr_t)malloc_zones, protect_size, 0, VM_PROT_READ);
+ mprotect(malloc_zones, protect_size, PROT_READ);
MALLOC_UNLOCK();
}
void
malloc_destroy_zone(malloc_zone_t *zone) {
+ malloc_set_zone_name(zone, NULL); // Deallocate zone name wherever it may reside PR_7701095
malloc_zone_unregister(zone);
zone->destroy(zone);
}
__malloc_check_env_name(const char *name)
{
MALLOC_LOCK();
+ /*
+ * <rdar://problem/8686255>
+ *
+ * 2. malloc will no longer take notice of *programmatic* changes to the MALLOC_* environment variables
+ * (i.e. calls to putenv() or setenv() that manipulate these environment variables.)
+ *
+ */
+#if 0
if(malloc_def_zone_state == 2 && strncmp(name, "Malloc", 6) == 0)
malloc_def_zone_state = 1;
+#endif
MALLOC_UNLOCK();
}
/********* Block creation and manipulation ************/
-extern const char *__crashreporter_info__;
-
static void
internal_check(void) {
static vm_address_t *frames = NULL;
malloc_printf("*** Recommend using 'setenv MallocCheckHeapStart %d; setenv MallocCheckHeapEach %d' to narrow down failure\n", recomm_start, recomm_each);
}
if (malloc_check_abort) {
- __crashreporter_info__ = b ? _simple_string(b) : "*** MallocCheckHeap: FAILED check";
+ CRSetCrashLogMessage(b ? _simple_string(b) : "*** MallocCheckHeap: FAILED check");
abort();
} else if (b)
_simple_sfree(b);
return NULL;
}
ptr = zone->malloc(zone, size);
- if (malloc_logger) malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)ptr, 0);
+ if (malloc_logger)
+ malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)ptr, 0);
return ptr;
}
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, (uintptr_t)zone, (uintptr_t)(num_items * size), 0, (uintptr_t)ptr, 0);
+ if (malloc_logger)
+ malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE | MALLOC_LOG_TYPE_CLEARED, (uintptr_t)zone, (uintptr_t)(num_items * size), 0,
+ (uintptr_t)ptr, 0);
return ptr;
}
return NULL;
}
ptr = zone->valloc(zone, size);
- if (malloc_logger) malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)ptr, 0);
+ if (malloc_logger)
+ malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)ptr, 0);
return ptr;
}
return NULL;
}
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, (uintptr_t)zone, (uintptr_t)ptr, (uintptr_t)size, (uintptr_t)new_ptr, 0);
+ if (malloc_logger)
+ malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)ptr, (uintptr_t)size,
+ (uintptr_t)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, (uintptr_t)zone, (uintptr_t)ptr, 0, 0, 0);
+ if (malloc_logger)
+ malloc_logger(MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)ptr, 0, 0, 0);
if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
static void
malloc_zone_free_definite_size(malloc_zone_t *zone, void *ptr, size_t size) {
- if (malloc_logger) malloc_logger(MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)ptr, 0, 0, 0);
+ if (malloc_logger)
+ malloc_logger(MALLOC_LOG_TYPE_DEALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)ptr, 0, 0, 0);
if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
return NULL;
}
ptr = zone->memalign(zone, alignment, size);
- if (malloc_logger) malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)ptr, 0);
+ if (malloc_logger)
+ malloc_logger(MALLOC_LOG_TYPE_ALLOCATE | MALLOC_LOG_TYPE_HAS_ZONE, (uintptr_t)zone, (uintptr_t)size, 0, (uintptr_t)ptr, 0);
return ptr;
}
// Modify the page to be allow write access, so that we can update the
// malloc_zones array.
size_t protect_size = malloc_num_zones_allocated * sizeof(malloc_zone_t *);
- vm_protect(mach_task_self(), (uintptr_t)malloc_zones, protect_size, 0, VM_PROT_READ | VM_PROT_WRITE);
+ mprotect(malloc_zones, protect_size, PROT_READ | PROT_WRITE);
+
+ // If we found a match, replace it with the entry at the end of the list, shrink the list,
+ // and leave the end of the list intact to avoid racing with find_registered_zone().
- // If we found a match, swap it with the entry on the back of the list
- // and null out the back of the list.
malloc_zones[index] = malloc_zones[malloc_num_zones - 1];
- malloc_zones[malloc_num_zones - 1] = NULL;
--malloc_num_zones;
- vm_protect(mach_task_self(), (uintptr_t)malloc_zones, protect_size, 0, VM_PROT_READ);
+ mprotect(malloc_zones, protect_size, PROT_READ);
+
+ // Exchange the roles of the FRZ counters. The counter that has captured the number of threads presently
+ // executing *inside* find_regiatered_zone is swapped with the counter drained to zero last time through.
+ // The former is then allowed to drain to zero while this thread yields.
+ int *p = pFRZCounterLive;
+ pFRZCounterLive = pFRZCounterDrain;
+ pFRZCounterDrain = p;
+ __sync_synchronize(); // Full memory barrier
+
+ while (0 != *pFRZCounterDrain) { pthread_yield_np(); }
+
MALLOC_UNLOCK();
+
return;
}
MALLOC_UNLOCK();
void
malloc_set_zone_name(malloc_zone_t *z, const char *name) {
char *newName;
+
+ mprotect(z, sizeof(malloc_zone_t), PROT_READ | PROT_WRITE);
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;
+ if (name) {
+ size_t buflen = strlen(name) + 1;
+ newName = malloc_zone_malloc(z, buflen);
+ if (newName) {
+ strlcpy(newName, name, buflen);
+ z->zone_name = (const char *)newName;
+ } else {
+ z->zone_name = NULL;
+ }
+ }
+ mprotect(z, sizeof(malloc_zone_t), PROT_READ);
}
const char *
malloc_printf("*** error for object %p: pointer being freed was not allocated\n"
"*** set a breakpoint in malloc_error_break to debug\n", ptr);
malloc_error_break();
- if ((malloc_debug_flags & (SCALABLE_MALLOC_ABORT_ON_CORRUPTION|SCALABLE_MALLOC_ABORT_ON_ERROR)))
- abort();
+ if ((malloc_debug_flags & (SCALABLE_MALLOC_ABORT_ON_CORRUPTION|SCALABLE_MALLOC_ABORT_ON_ERROR))) {
+ _SIMPLE_STRING b = _simple_salloc();
+ if (b) {
+ _simple_sprintf(b, "*** error for object %p: pointer being freed was not allocated\n", ptr);
+ CRSetCrashLogMessage(_simple_string(b));
+ } else {
+ CRSetCrashLogMessage("*** error: pointer being freed was not allocated\n");
+ }
+ abort();
+ }
} else if (zone->version >= 6 && zone->free_definite_size)
malloc_zone_free_definite_size(zone, ptr, size);
else
void *
realloc(void *in_ptr, size_t new_size) {
- void *retval;
+ void *retval = NULL;
void *old_ptr;
malloc_zone_t *zone;
size_t old_size = 0;
retval = malloc_zone_malloc(inline_malloc_default_zone(), new_size);
} else {
zone = find_registered_zone(old_ptr, &old_size);
- if (zone && old_size >= new_size)
- return old_ptr;
-
- if (!zone)
- zone = inline_malloc_default_zone();
-
- retval = malloc_zone_realloc(zone, old_ptr, new_size);
+ if (!zone) {
+ malloc_printf("*** error for object %p: pointer being realloc'd was not allocated\n"
+ "*** set a breakpoint in malloc_error_break to debug\n", old_ptr);
+ malloc_error_break();
+ if ((malloc_debug_flags & (SCALABLE_MALLOC_ABORT_ON_CORRUPTION|SCALABLE_MALLOC_ABORT_ON_ERROR))) {
+ _SIMPLE_STRING b = _simple_salloc();
+ if (b) {
+ _simple_sprintf(b, "*** error for object %p: pointer being realloc'd was not allocated\n", old_ptr);
+ CRSetCrashLogMessage(_simple_string(b));
+ } else {
+ CRSetCrashLogMessage("*** error: pointer being realloc'd was not allocated\n");
+ }
+ abort();
+ }
+ } else {
+ retval = malloc_zone_realloc(zone, old_ptr, new_size);
+ }
}
if (retval == NULL) {
errno = ENOMEM;
return 0;
}
+size_t malloc_zone_pressure_relief(malloc_zone_t *zone, size_t goal)
+{
+ if (!zone) {
+ unsigned index = 0;
+ size_t total = 0;
+
+ // Take lock to defend against malloc_destroy_zone()
+ MALLOC_LOCK();
+ while (index < malloc_num_zones) {
+ zone = malloc_zones[index++];
+ if (zone->version < 8)
+ continue;
+ if (NULL == zone->pressure_relief)
+ continue;
+ if (0 == goal) /* Greedy */
+ total += zone->pressure_relief(zone, 0);
+ else if (goal > total)
+ total += zone->pressure_relief(zone, goal - total);
+ else /* total >= goal */
+ break;
+ }
+ MALLOC_UNLOCK();
+ return total;
+ } else {
+ // Assumes zone is not destroyed for the duration of this call
+ if (zone->version < 8)
+ return 0;
+ if (NULL == zone->pressure_relief)
+ return 0;
+ return zone->pressure_relief(zone, goal);
+ }
+}
+
/********* Batch methods ************/
unsigned
malloc_zone_batch_malloc(malloc_zone_t *zone, size_t size, void **results, unsigned num_requested) {
unsigned (*batch_malloc)(malloc_zone_t *, size_t, void **, unsigned) = zone-> batch_malloc;
- if (! batch_malloc) return 0;
+ if (! batch_malloc)
+ return 0;
if (malloc_check_start && (malloc_check_counter++ >= malloc_check_start)) {
internal_check();
}
if (b) {
_simple_sprintf(b, "*** error %d", x);
malloc_printf("%s\n", _simple_string(b));
- __crashreporter_info__ = _simple_string(b);
+ CRSetCrashLogMessage(_simple_string(b));
} else {
_malloc_printf(MALLOC_PRINTF_NOLOG, "*** error %d", x);
- __crashreporter_info__ = "*** DefaultMallocError called";
+ CRSetCrashLogMessage("*** DefaultMallocError called");
}
abort();
#endif
return(m);
}
+boolean_t
+malloc_zone_enable_discharge_checking(malloc_zone_t *zone)
+{
+ if (zone->version < 7) // Version must be >= 7 to look at the new discharge checking fields.
+ return FALSE;
+ if (NULL == zone->introspect->enable_discharge_checking)
+ return FALSE;
+ return zone->introspect->enable_discharge_checking(zone);
+}
+
+void
+malloc_zone_disable_discharge_checking(malloc_zone_t *zone)
+{
+ if (zone->version < 7) // Version must be >= 7 to look at the new discharge checking fields.
+ return;
+ if (NULL == zone->introspect->disable_discharge_checking)
+ return;
+ zone->introspect->disable_discharge_checking(zone);
+}
+
+void
+malloc_zone_discharge(malloc_zone_t *zone, void *memory)
+{
+ if (NULL == zone)
+ zone = malloc_zone_from_ptr(memory);
+ if (NULL == zone)
+ return;
+ if (zone->version < 7) // Version must be >= 7 to look at the new discharge checking fields.
+ return;
+ if (NULL == zone->introspect->discharge)
+ return;
+ zone->introspect->discharge(zone, memory);
+}
+
+void
+malloc_zone_enumerate_discharged_pointers(malloc_zone_t *zone, void (^report_discharged)(void *memory, void *info))
+{
+ if (!zone) {
+ unsigned index = 0;
+ while (index < malloc_num_zones) {
+ zone = malloc_zones[index++];
+ if (zone->version < 7)
+ continue;
+ if (NULL == zone->introspect->enumerate_discharged_pointers)
+ continue;
+ zone->introspect->enumerate_discharged_pointers(zone, report_discharged);
+ }
+ } else {
+ if (zone->version < 7)
+ return;
+ if (NULL == zone->introspect->enumerate_discharged_pointers)
+ return;
+ zone->introspect->enumerate_discharged_pointers(zone, report_discharged);
+ }
+}
+
/***************** OBSOLETE ENTRY POINTS ********************/
#if PHASE_OUT_OLD_MALLOC
projects / apple / libc.git / blobdiff