--- libmalloc/libmalloc-409.81.2/src/nano_malloc_common.h
+++ libmalloc/libmalloc-521.100.59/src/nano_malloc_common.h
@@ -24,12 +24,20 @@
 #ifndef __NANO_MALLOC_COMMON_H
 #define __NANO_MALLOC_COMMON_H
 
+#include <malloc/_ptrcheck.h>
+__ptrcheck_abi_assume_single()
+
 typedef enum {
 	NANO_NONE	= 0,
 	NANO_V2		= 2,
 } nano_version_t;
 
 // Nano malloc enabled flag
+//
+// Note that this flag indicates whether a "nano-like" configuration, i.e. one
+// that trades memory for CPU and scalability, is enabled, but not literally
+// whether the nano allocator itself is engaged.  Test for nano itself using
+// initial_nano_zone.
 MALLOC_NOEXPORT
 extern nano_version_t _malloc_engaged_nano;
 
@@ -38,7 +46,11 @@
 extern unsigned int nano_common_max_magazines;
 
 MALLOC_NOEXPORT
-extern boolean_t nano_common_max_magazines_is_ncpu;
+extern bool nano_common_max_magazines_is_ncpu;
+
+// Index of last region to be allocated
+MALLOC_NOEXPORT
+extern unsigned int nano_max_region;
 
 MALLOC_NOEXPORT
 void
@@ -46,7 +58,7 @@
 
 MALLOC_NOEXPORT
 void
-nano_common_init(const char *envp[], const char *apple[], const char *bootargs);
+nano_common_init(const char * __null_terminated * __null_terminated envp, const char * __null_terminated * __null_terminated apple, const char *bootargs);
 
 MALLOC_NOEXPORT
 void
@@ -58,8 +70,16 @@
 		unsigned debug_flags, int vm_page_label, void *base_addr);
 
 MALLOC_NOEXPORT
-boolean_t
+bool
 nano_common_allocate_vm_space(mach_vm_address_t base, mach_vm_size_t size);
+
+MALLOC_NOEXPORT
+bool
+nano_common_reserve_vm_space(mach_vm_address_t base, mach_vm_size_t size);
+
+MALLOC_NOEXPORT
+bool
+nano_common_unprotect_vm_space(mach_vm_address_t base, mach_vm_size_t size);
 
 MALLOC_NOEXPORT
 void
@@ -70,5 +90,9 @@
 nano_common_default_reader(task_t task, vm_address_t address, vm_size_t size,
 		void **ptr);
 
+MALLOC_NOEXPORT
+nano_version_t
+_nano_common_init_pick_mode(const char * __null_terminated * __null_terminated envp, const char * __null_terminated * __null_terminated apple, const char *bootargs, bool space_efficient_enabled);
+
 #endif // __NANO_MALLOC_COMMON_H