--- libmalloc/libmalloc-474.0.13/src/magazine_tiny.c
+++ libmalloc/libmalloc-409.81.2/src/magazine_tiny.c
@@ -37,6 +37,25 @@
 // Decrements the size part of mag_last_free by a given msize value. Must not
 // reduce the msize part below zero (not checked).
 #define TINY_MAG_LAST_FREE_PTR_DEC_MSIZE(x, msize_delta) (x) = ((void *)(x) - (msize_delta))
+
+static MALLOC_INLINE MALLOC_ALWAYS_INLINE
+mag_index_t
+tiny_mag_get_thread_index(void)
+{
+#if CONFIG_TINY_USES_HYPER_SHIFT
+	if (os_likely(_os_cpu_number_override == -1)) {
+		return _malloc_cpu_number() >> hyper_shift;
+	} else {
+		return _os_cpu_number_override >> hyper_shift;
+	}
+#else // CONFIG_SMALL_USES_HYPER_SHIFT
+	if (os_likely(_os_cpu_number_override == -1)) {
+		return _malloc_cpu_number();
+	} else {
+		return _os_cpu_number_override;
+	}
+#endif // CONFIG_SMALL_USES_HYPER_SHIFT
+}
 
 static inline grain_t
 tiny_slot_from_msize(msize_t msize)
@@ -2396,7 +2415,7 @@
 tiny_malloc_should_clear(rack_t *rack, msize_t msize, boolean_t cleared_requested)
 {
 	void *ptr;
-	mag_index_t mag_index = rack_get_thread_index(rack) % rack->num_magazines;
+	mag_index_t mag_index = tiny_mag_get_thread_index() % rack->num_magazines;
 	magazine_t *tiny_mag_ptr = &(rack->magazines[mag_index]);
 
 	MALLOC_TRACE(TRACE_tiny_malloc, (uintptr_t)rack, TINY_BYTES_FOR_MSIZE(msize), (uintptr_t)tiny_mag_ptr, cleared_requested);
@@ -2658,8 +2677,7 @@
 {
 	msize_t msize = TINY_MSIZE_FOR_BYTES(size + TINY_QUANTUM - 1);
 	unsigned found = 0;
-
-	mag_index_t mag_index = rack_get_thread_index(&szone->tiny_rack) % szone->tiny_rack.num_magazines;
+	mag_index_t mag_index = tiny_mag_get_thread_index() % szone->tiny_rack.num_magazines;
 	magazine_t *tiny_mag_ptr = &(szone->tiny_rack.magazines[mag_index]);
 
 	// make sure to return objects at least one quantum in size