--- libmalloc/libmalloc-283.100.6/src/purgeable_malloc.c
+++ libmalloc/libmalloc-166.200.60/src/purgeable_malloc.c
@@ -38,7 +38,7 @@
 static void *
 purgeable_malloc(szone_t *szone, size_t size)
 {
-	if (size <= LARGE_THRESHOLD(szone)) {
+	if (size <= szone->large_threshold) {
 		return szone_malloc(szone->helper_zone, size);
 	} else {
 		return szone_malloc(szone, size);
@@ -54,7 +54,7 @@
 		return NULL;
 	}
 
-	if (total_bytes <= LARGE_THRESHOLD(szone)) {
+	if (total_bytes <= szone->large_threshold) {
 		return szone_calloc(szone->helper_zone, 1, total_bytes);
 	} else {
 		return szone_calloc(szone, 1, total_bytes);
@@ -64,7 +64,7 @@
 static void *
 purgeable_valloc(szone_t *szone, size_t size)
 {
-	if (size <= LARGE_THRESHOLD(szone)) {
+	if (size <= szone->large_threshold) {
 		return szone_valloc(szone->helper_zone, size);
 	} else {
 		return szone_valloc(szone, size);
@@ -89,7 +89,7 @@
 static void
 purgeable_free_definite_size(szone_t *szone, void *ptr, size_t size)
 {
-	if (size <= LARGE_THRESHOLD(szone)) {
+	if (size <= szone->large_threshold) {
 		return szone_free_definite_size(szone->helper_zone, ptr, size);
 	} else {
 		return szone_free_definite_size(szone, ptr, size);
@@ -124,8 +124,8 @@
 
 	// Distinguish 4 cases: {oldsize, newsize} x { <= , > large_threshold }
 	// and deal with the allocation crossing from the purgeable zone to the helper zone and vice versa.
-	if (old_size <= LARGE_THRESHOLD(szone)) {
-		if (new_size <= LARGE_THRESHOLD(szone)) {
+	if (old_size <= szone->large_threshold) {
+		if (new_size <= szone->large_threshold) {
 			return szone_realloc(szone->helper_zone, ptr, new_size);
 		} else {
 			// allocation crosses from helper to purgeable zone
@@ -137,7 +137,7 @@
 			return new_ptr; // in state VM_PURGABLE_NONVOLATILE
 		}
 	} else {
-		if (new_size <= LARGE_THRESHOLD(szone)) {
+		if (new_size <= szone->large_threshold) {
 			// allocation crosses from purgeable to helper zone
 			void *new_ptr = szone_malloc(szone->helper_zone, new_size);
 			if (new_ptr) {
@@ -196,7 +196,7 @@
 static void *
 purgeable_memalign(szone_t *szone, size_t alignment, size_t size)
 {
-	if (size <= LARGE_THRESHOLD(szone)) {
+	if (size <= szone->large_threshold) {
 		return szone_memalign(szone->helper_zone, alignment, size);
 	} else {
 		return szone_memalign(szone, alignment, size);
@@ -215,7 +215,7 @@
 	kern_return_t err;
 
 	if (!reader) {
-		reader = _malloc_default_reader;
+		reader = _szone_default_reader;
 	}
 
 	err = reader(task, zone_address, sizeof(szone_t), (void **)&szone);
@@ -223,16 +223,15 @@
 		return err;
 	}
 
-	err = large_in_use_enumerator(task, context, type_mask,
-			(vm_address_t)szone->large_entries, szone->num_large_entries,
-			reader, recorder);
+	err = large_in_use_enumerator(
+								  task, context, type_mask, (vm_address_t)szone->large_entries, szone->num_large_entries, reader, recorder);
 	return err;
 }
 
 static size_t
 purgeable_good_size(szone_t *szone, size_t size)
 {
-	if (size <= LARGE_THRESHOLD(szone)) {
+	if (size <= szone->large_threshold) {
 		return szone_good_size(szone->helper_zone, size);
 	} else {
 		return szone_good_size(szone, size);
@@ -246,31 +245,10 @@
 }
 
 static void
-purgeable_print(task_t task, unsigned level MALLOC_UNUSED,
-		vm_address_t zone_address, memory_reader_t reader,
-		print_task_printer_t printer)
-{
-	szone_t *szone;
-	if (reader(task, zone_address, sizeof(szone_t), (void **)&szone)) {
-		printer("Purgeable zone %p: inUse=%u(%y) flags=%d\n", zone_address,
-				szone->num_large_objects_in_use,
-				(int)szone->num_bytes_in_large_objects,
-				szone->debug_flags);
-	}
-}
-
-static void
-purgeable_print_self(szone_t *szone, boolean_t verbose)
-{
-	purgeable_print(mach_task_self(), verbose ? MALLOC_VERBOSE_PRINT_LEVEL : 0,
-			(vm_address_t)szone, _malloc_default_reader, malloc_report_simple);
-}
-
-static void
-purgeable_print_task(task_t task, unsigned level, vm_address_t zone_address,
-		memory_reader_t reader, print_task_printer_t printer)
-{
-	purgeable_print(task, level, zone_address, reader, printer);
+purgeable_print(szone_t *szone, boolean_t verbose)
+{
+	malloc_report(MALLOC_REPORT_NOLOG | MALLOC_REPORT_NOPREFIX, "Scalable zone %p: inUse=%u(%y) flags=%d\n", szone,
+				   szone->num_large_objects_in_use, (int)szone->num_bytes_in_large_objects, szone->debug_flags);
 }
 
 static void
@@ -326,18 +304,10 @@
 }
 
 static const struct malloc_introspection_t purgeable_introspect = {
-	(void *)purgeable_ptr_in_use_enumerator,
-	(void *)purgeable_good_size,
-	(void *)purgeable_check,
-	(void *)purgeable_print_self,
-	(void *)purgeable_log,
-	(void *)purgeable_force_lock,
-	(void *)purgeable_force_unlock,
-	(void *)purgeable_statistics,
-	(void *)purgeable_locked,
-	NULL, NULL, NULL, NULL, /* Zone enumeration version 7 and forward. */
-	(void *)purgeable_reinit_lock, // reinit_lock version 9 and forward
-	(void *)purgeable_print_task,  // print_task version 11 and forward
+	(void *)purgeable_ptr_in_use_enumerator, (void *)purgeable_good_size, (void *)purgeable_check, (void *)purgeable_print,
+	purgeable_log, (void *)purgeable_force_lock, (void *)purgeable_force_unlock, (void *)purgeable_statistics,
+	(void *)purgeable_locked, NULL, NULL, NULL, NULL, /* Zone enumeration version 7 and forward. */
+	(void *)purgeable_reinit_lock, // reinit_lock version 9 and foward
 }; // marked as const to spare the DATA section
 
 
@@ -354,7 +324,7 @@
 	uint64_t hw_memsize = 0;
 
 	/* get memory for the zone. */
-	szone = mvm_allocate_pages(SZONE_PAGED_SIZE, 0, DISABLE_ASLR, VM_MEMORY_MALLOC);
+	szone = mvm_allocate_pages(SZONE_PAGED_SIZE, 0, 0, VM_MEMORY_MALLOC);
 	if (!szone) {
 		return NULL;
 	}
@@ -376,6 +346,11 @@
 	rack_init(&szone->tiny_rack, RACK_TYPE_TINY, 0, debug_flags | MALLOC_PURGEABLE);
 	rack_init(&szone->small_rack, RACK_TYPE_SMALL, 0, debug_flags | MALLOC_PURGEABLE);
 
+	/* Purgeable zone does not participate in the adaptive "largemem" sizing. */
+	szone->is_largemem = 0;
+	szone->large_threshold = LARGE_THRESHOLD;
+	szone->vm_copy_threshold = VM_COPY_THRESHOLD;
+
 #if CONFIG_LARGE_CACHE
 	// madvise(..., MADV_REUSABLE) death-row arrivals above this threshold [~0.1%]
 	szone->large_entry_cache_reserve_limit = (size_t)(hw_memsize >> 10);
@@ -389,7 +364,7 @@
 	}
 #endif
 
-	szone->basic_zone.version = 11;
+	szone->basic_zone.version = 10;
 	szone->basic_zone.size = (void *)purgeable_size;
 	szone->basic_zone.malloc = (void *)purgeable_malloc;
 	szone->basic_zone.calloc = (void *)purgeable_calloc;
@@ -412,13 +387,11 @@
 	szone->debug_flags = debug_flags | MALLOC_PURGEABLE;
 
 	/* Purgeable zone does not support MALLOC_ADD_GUARD_PAGES. */
-	if (szone->debug_flags & MALLOC_ALL_GUARD_PAGE_FLAGS) {
-		if (!(szone->debug_flags & MALLOC_GUARD_ALL)) {
-			// Don't report when MallocGuardEdges == "all".
-			malloc_report(ASL_LEVEL_INFO, "purgeable zone does not support guard pages\n");
-		}
-		szone->debug_flags &= ~MALLOC_ALL_GUARD_PAGE_FLAGS;
-	}
+	if (szone->debug_flags & MALLOC_ADD_GUARD_PAGES) {
+		malloc_report(ASL_LEVEL_INFO, "purgeable zone does not support guard pages\n");
+		szone->debug_flags &= ~MALLOC_ADD_GUARD_PAGES;
+	}
+
 	_malloc_lock_init(&szone->large_szone_lock);
 
 	szone->helper_zone = (struct szone_s *)malloc_default_zone;