xnu-4903.241.1.tar.gz

[apple/xnu.git] / osfmk / kern / ltable.c

diff --git a/osfmk/kern/ltable.c b/osfmk/kern/ltable.c
index 4aedca0d44f6663749a8223af24e4092b7c6d1d0..43eb195108b62277c577fcd154feabb4f1ba6ddb 100644 (file)
--- a/osfmk/kern/ltable.c
+++ b/osfmk/kern/ltable.c
@@ -50,7 +50,7 @@ static lck_grp_t  g_lt_lck_grp;
 /* default VA space for link tables (zone allocated) */
 #define DEFAULT_MAX_TABLE_SIZE  P2ROUNDUP(8 * 1024 * 1024, PAGE_SIZE)
 
-#if defined(DEVELOPMENT) || defined(DEBUG)
+#if DEVELOPMENT || DEBUG
 /* global for lldb macros */
 uint64_t g_lt_idx_max = LT_IDX_MAX;
 #endif
@@ -61,7 +61,7 @@ uint64_t g_lt_idx_max = LT_IDX_MAX;
        /* cast through 'void *' to avoid compiler alignment warning messages */ \
        ((struct lt_elem *)((void *)((uintptr_t)(slab) + ((ofst) & (slab_msk)))))
 
-#if defined(CONFIG_LTABLE_STATS)
+#if CONFIG_LTABLE_STATS
 /* version that makes no assumption on waste within a slab */
 static inline struct lt_elem *
 lt_elem_idx(struct link_table *table, uint32_t idx)
@@ -87,7 +87,7 @@ lt_elem_idx(struct link_table *table, uint32_t idx)
        assert(slab->lt_id.idx <= idx && (slab->lt_id.idx + table->slab_elem) > idx);
        return lt_elem_ofst_slab(slab, table->slab_msk, ofst);
 }
-#endif /* !CONFIG_LTABLE_STATS */
+#endif /* CONFIG_LTABLE_STATS */
 
 static int __assert_only
 lt_elem_in_range(struct lt_elem *elem, struct link_table *table)
@@ -405,6 +405,22 @@ void ltable_grow(struct link_table *table, uint32_t min_free)
        return;
 }
 
+#if DEVELOPMENT || DEBUG
+
+int
+ltable_nelem(struct link_table *table)
+{
+       int nelem = 0;
+
+       lck_mtx_lock(&table->lock);
+
+       nelem = table->used_elem;
+
+       lck_mtx_unlock(&table->lock);
+
+       return nelem;
+}
+#endif
 
 /**
  * ltable_alloc_elem: allocate one or more elements from a given table