--- libmalloc/libmalloc-521.120.7/src/malloc_common.h
+++ libmalloc/libmalloc-409.60.6/src/malloc_common.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2023 Apple Inc. All rights reserved.
+ * Copyright (c) 2018 Apple Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  *
@@ -20,36 +20,25 @@
  *
  * @APPLE_LICENSE_HEADER_END@
  */
-
 #ifndef __MALLOC_COMMON_H
 #define __MALLOC_COMMON_H
 
-#include <TargetConditionals.h>
-#include <errno.h>
-#include <stddef.h>
-#include <sys/cdefs.h>
-
-#include "base.h"
-
-#include <malloc/_ptrcheck.h>
-__ptrcheck_abi_assume_single()
-
 MALLOC_NOEXPORT
-const char * __null_terminated
-malloc_common_strstr(const char * __null_terminated src, const char * __counted_by(target_len) target, size_t target_len);
+const char *
+malloc_common_strstr(const char *src, const char *target, size_t target_len);
 
 MALLOC_NOEXPORT
 long
-malloc_common_convert_to_long(const char * __null_terminated ptr, const char * __null_terminated *end_ptr);
+malloc_common_convert_to_long(const char *ptr, const char **end_ptr);
 
 MALLOC_NOEXPORT
-const char * __null_terminated
-malloc_common_value_for_key(const char * __null_terminated src, const char * __null_terminated key);
+const char *
+malloc_common_value_for_key(const char *src, const char *key);
 
 MALLOC_NOEXPORT
-const char * __null_terminated
-malloc_common_value_for_key_copy(const char * __null_terminated src, const char * __null_terminated key,
-		 char * __counted_by(maxlen) bufp, size_t maxlen);
+const char *
+malloc_common_value_for_key_copy(const char *src, const char *key,
+		 char *bufp, size_t maxlen);
 
 __options_decl(malloc_zone_options_t, unsigned, {
 	MZ_NONE  = 0x0,
@@ -61,21 +50,17 @@
 malloc_set_errno_fast(malloc_zone_options_t mzo, int err)
 {
 	if (mzo & MZ_POSIX) {
-#if MALLOC_TARGET_EXCLAVES || TARGET_OS_SIMULATOR
+#if TARGET_OS_SIMULATOR
 		errno = err;
 #else
 		(*_pthread_errno_address_direct()) = err;
-#endif // MALLOC_TARGET_EXCLAVES || TARGET_OS_SIMULATOR
+#endif
 	}
 }
 
 MALLOC_NOEXPORT
 void
-malloc_slowpath_update(void);
-
-MALLOC_NOEXPORT
-void
-find_zone_and_free(void * __unsafe_indexable ptr, bool known_non_default);
+find_zone_and_free(void *ptr, bool known_non_default);
 
 typedef enum {
 	MALLOC_ZERO_ON_FREE = 0, // this is the 0 case so most checks can be 0-tests
@@ -86,134 +71,4 @@
 MALLOC_NOEXPORT
 extern malloc_zero_policy_t malloc_zero_policy;
 
-MALLOC_NOEXPORT
-unsigned
-malloc_zone_batch_malloc_fallback(malloc_zone_t *zone, size_t size,
-		void * __unsafe_indexable * __counted_by(num_requested) results, unsigned num_requested);
-
-MALLOC_NOEXPORT
-size_t
-malloc_zone_pressure_relief_fallback(malloc_zone_t *zone, size_t goal);
-
-MALLOC_NOEXPORT
-void
-malloc_zone_batch_free_fallback(malloc_zone_t *zone, void * __unsafe_indexable * __counted_by(num) to_be_freed,
-		unsigned num);
-
-#if CONFIG_MALLOC_PROCESS_IDENTITY
-
-typedef enum {
-	MALLOC_PROCESS_NONE,
-
-	// Darwin
-	MALLOC_PROCESS_LAUNCHD,
-	MALLOC_PROCESS_LOGD,
-	MALLOC_PROCESS_NOTIFYD,
-
-	// Media
-	MALLOC_PROCESS_MEDIAPARSERD,
-	MALLOC_PROCESS_VIDEOCODECD,
-	MALLOC_PROCESS_MEDIAPLAYBACKD,
-	MALLOC_PROCESS_AUDIOMXD,
-	MALLOC_PROCESS_AVCONFERENCED,
-	MALLOC_PROCESS_MEDIASERVERD,
-	MALLOC_PROCESS_CAMERACAPTURED,
-
-	// Messages
-	MALLOC_PROCESS_BLASTDOOR_MESSAGES,
-	MALLOC_PROCESS_BLASTDOOR_IDS,
-	MALLOC_PROCESS_IMDPERSISTENCEAGENT,
-	MALLOC_PROCESS_IMAGENT,
-
-	// quicklook
-	MALLOC_PROCESS_QUICKLOOK_THUMBNAIL_SECURE,
-	MALLOC_PROCESS_QUICKLOOK_PREVIEW,
-	MALLOC_PROCESS_QUICKLOOK_THUMBNAIL,
-
-	MALLOC_PROCESS_TELNETD,
-	MALLOC_PROCESS_SSHD,
-	MALLOC_PROCESS_SSHD_KEYGEN_WRAPPER,
-	MALLOC_PROCESS_BASH,
-	MALLOC_PROCESS_DASH,
-	MALLOC_PROCESS_SH,
-	MALLOC_PROCESS_ZSH,
-	MALLOC_PROCESS_PYTHON3,
-	MALLOC_PROCESS_PERL,
-	MALLOC_PROCESS_SU,
-	MALLOC_PROCESS_TIME,
-	MALLOC_PROCESS_FIND,
-	MALLOC_PROCESS_XARGS,
-
-	// Browser
-	MALLOC_PROCESS_BROWSER,
-	MALLOC_PROCESS_MTLCOMPILERSERVICE,
-
-	// Other
-	MALLOC_PROCESS_CALLSERVICESD,
-	MALLOC_PROCESS_MAILD,
-	MALLOC_PROCESS_MDNSRESPONDER,
-	MALLOC_PROCESS_ASVASSETVIEWER,
-	MALLOC_PROCESS_IDENTITYSERVICESD,
-	MALLOC_PROCESS_WIFID,
-	MALLOC_PROCESS_FMFD,
-	MALLOC_PROCESS_SEARCHPARTYD,
-	MALLOC_PROCESS_VMD,
-	MALLOC_PROCESS_COMMCENTER,
-	MALLOC_PROCESS_WIFIP2PD,
-	MALLOC_PROCESS_WIFIANALYTICSD,
-	MALLOC_PROCESS_AEGIRPOSTER,
-	MALLOC_PROCESS_COLLECTIONSPOSTER,
-
-	MALLOC_PROCESS_COUNT,
-} malloc_process_identity_t;
-
-#endif // CONFIG_MALLOC_PROCESS_IDENTITY
-
-typedef enum : unsigned {
-	MALLOC_ZONE_TYPE_UNKNOWN,
-	MALLOC_ZONE_TYPE_XZONE,
-	MALLOC_ZONE_TYPE_PGM,
-	MALLOC_ZONE_TYPE_SANITIZER,
-} malloc_zone_type_t;
-
-MALLOC_NOEXPORT
-kern_return_t
-get_zone_type(task_t task,
-		memory_reader_t reader,
-		vm_address_t zone_address,
-		unsigned *zone_type) __result_use_check;
-
-MALLOC_NOEXPORT
-malloc_zone_t *
-get_wrapped_zone(malloc_zone_t *zone);
-
-static MALLOC_INLINE
-const char *
-get_wrapper_zone_label(malloc_zone_t *wrapper_zone)
-{
-	// malloc_introspection_t::zone_type availability
-	MALLOC_ASSERT(wrapper_zone->version >= 14);
-
-	unsigned zone_type = wrapper_zone->introspect->zone_type;
-	switch (zone_type) {
-	case MALLOC_ZONE_TYPE_PGM:
-		return "PGM";
-	case MALLOC_ZONE_TYPE_SANITIZER:
-		return "Sanitizer";
-	}
-	__builtin_unreachable();
-}
-
-struct wrapper_zone_layout_s {
-	malloc_zone_t malloc_zone;
-	malloc_zone_t *wrapped_zone;
-};
-
-#define WRAPPED_ZONE_OFFSET offsetof(struct wrapper_zone_layout_s, wrapped_zone)
-#define ASSERT_WRAPPER_ZONE(zone_t) \
-	MALLOC_STATIC_ASSERT(offsetof(zone_t, malloc_zone) == 0, \
-			#zone_t " instances must be usable as regular malloc zones"); \
-	MALLOC_STATIC_ASSERT(offsetof(zone_t, wrapped_zone) == WRAPPED_ZONE_OFFSET, \
-			"malloc_get_wrapped_zone() dependency");
-
 #endif // __MALLOC_COMMON_H