--- libmalloc/libmalloc-425.100.7/src/nano_malloc_common.c
+++ libmalloc/libmalloc-792.80.2/src/nano_malloc_common.c
@@ -54,6 +54,59 @@
 #pragma mark -
 #pragma mark Initialization
 
+nano_version_t
+_nano_common_init_pick_mode(const char *envp[], const char *apple[], const char *bootargs, bool space_efficient_enabled)
+{
+	const char *p = NULL;
+	const char *flag = NULL;
+	nano_version_t ret = NANO_NONE;
+
+	// Use the nanov2_mode boot argument and MallocNanoZone to determine
+	// whether to use nano
+	nanov2_mode_t nanov2_mode = NANOV2_DEFAULT_MODE;
+
+	p = malloc_common_value_for_key(bootargs, mode_boot_arg);
+	if (p) {
+		if (!strncmp(p, enabled_mode, sizeof(enabled_mode) - 1)) {
+			nanov2_mode = NANO_ENABLED;
+		} else if (!strncmp(p, forced_mode, sizeof(forced_mode) - 1)) {
+			nanov2_mode = NANO_FORCED;
+		} else if (!strncmp(p, conditional_mode, sizeof(conditional_mode) - 1)) {
+			nanov2_mode = NANO_CONDITIONAL;
+		}
+	}
+
+	if (nanov2_mode == NANO_FORCED) {
+		ret = NANO_V2;
+	} else {
+		if (nanov2_mode == NANO_CONDITIONAL) {
+			// If conditional mode is selected, ignore the apple[] array and
+			// make the decision based of space efficient mode.
+			ret = space_efficient_enabled ? NANO_NONE : NANO_V2;
+		} else {
+			flag = _simple_getenv(apple, "MallocNanoZone");
+			if (flag && flag[0] == '1') {
+				ret = NANO_V2;
+			}
+		}
+		/* Explicit overrides from the environment */
+		flag = _simple_getenv(envp, "MallocNanoZone");
+		if (flag) {
+			if (flag[0] == '1') {
+				ret = NANO_V2;
+			} else if (flag[0] == '0') {
+				ret = NANO_NONE;
+			} else if (flag[0] == 'V' || flag[0] == 'v') {
+				if (flag[1] == '1' || flag[1] == '2') {
+					ret = NANO_V2;
+				}
+			}
+		}
+	}
+
+	return ret;
+}
+
 // Shared initialization code. Determines which version of Nano should be used,
 // if any, and sets _malloc_engaged_nano. The Nano version is determined as
 // follows:
@@ -64,54 +117,11 @@
 void
 nano_common_init(const char *envp[], const char *apple[], const char *bootargs)
 {
-	const char *flag = NULL;
-	const char *p = NULL;
-
-	// Use the nanov2_mode boot argument and MallocNanoZone to determine
-	// whether to use nano
-	nanov2_mode_t nanov2_mode = NANOV2_DEFAULT_MODE;
-
-	p = malloc_common_value_for_key(bootargs, mode_boot_arg);
-	if (p) {
-		if (!strncmp(p, enabled_mode, sizeof(enabled_mode) - 1)) {
-			nanov2_mode = NANO_ENABLED;
-		} else if (!strncmp(p, forced_mode, sizeof(forced_mode) - 1)) {
-			nanov2_mode = NANO_FORCED;
-		} else if (!strncmp(p, conditional_mode, sizeof(conditional_mode) - 1)) {
-			nanov2_mode = NANO_CONDITIONAL;
-		}
-	}
-
-	if (nanov2_mode == NANO_FORCED) {
-		_malloc_engaged_nano = NANO_V2;
-	} else {
-		if (nanov2_mode == NANO_CONDITIONAL) {
-			// If conditional mode is selected, ignore the apple[] array and
-			// make the decision based of space efficient mode.
-			_malloc_engaged_nano = malloc_space_efficient_enabled ? NANO_NONE : NANO_V2;
-		} else {
-			flag = _simple_getenv(apple, "MallocNanoZone");
-			if (flag && flag[0] == '1') {
-				_malloc_engaged_nano = NANO_V2;
-			}
-		}
-		/* Explicit overrides from the environment */
-		flag = _simple_getenv(envp, "MallocNanoZone");
-		if (flag) {
-			if (flag[0] == '1') {
-				_malloc_engaged_nano = NANO_V2;
-			} else if (flag[0] == '0') {
-				_malloc_engaged_nano = NANO_NONE;
-			} else if (flag[0] == 'V' || flag[0] == 'v') {
-				if (flag[1] == '1' || flag[1] == '2') {
-					_malloc_engaged_nano = NANO_V2;
-				}
-			}
-		}
-	}
+	_malloc_engaged_nano = _nano_common_init_pick_mode(envp, apple, bootargs, malloc_space_efficient_enabled);
+
 #if NANOV2_MULTIPLE_REGIONS
 	// Override max region number from environment
-	p = malloc_common_value_for_key(bootargs, "malloc_nano_max_region");
+	const char *p = malloc_common_value_for_key(bootargs, "malloc_nano_max_region");
 	if (p) {
 		long value = strtol(p, NULL, 10);
 		if (value) {
@@ -125,7 +135,7 @@
 			}
 		}
 	}
-	flag = _simple_getenv(envp, "MallocNanoMaxRegion");
+	const char *flag = _simple_getenv(envp, "MallocNanoMaxRegion");
 	if (flag) {
 		long value = strtol(flag, NULL, 10);
 		if (value) {