mem: fix real_used stats for realloc

[sip-router] / mem / f_malloc.c

diff --git a/mem/f_malloc.c b/mem/f_malloc.c
index 2c05fe6..49c4b7a 100644 (file)
--- a/mem/f_malloc.c
+++ b/mem/f_malloc.c
@@ -491,7 +491,9 @@ void* fm_realloc(struct fm_block* qm, void* p, unsigned long size)
                fm_split_frag(qm, f, size);
 #endif
 #if defined(DBG_F_MALLOC) || defined(MALLOC_STATS)
-               qm->real_used-=(orig_size-f->size-FRAG_OVERHEAD);
+               /* fm_split frag already adds FRAG_OVERHEAD for the newly created
+                  free frag, so here we only need orig_size-f->size for real used */
+               qm->real_used-=(orig_size-f->size);
                qm->used-=(orig_size-f->size);
 #endif
        }else if (f->size<size){