memheap: check against over written in rt_memheap_free

2015-01-16 11:41:20 +08:00 · 2015-01-16 11:41:20 +08:00 · f8c171d5ad
parent 571095e84c
commit f8c171d5ad
1 changed files with 2 additions and 0 deletions
--- a/src/memheap.c
+++ b/src/memheap.c
@ -517,6 +517,8 @@ void rt_memheap_free(void *ptr)

    /* check magic */
    RT_ASSERT((header_ptr->magic & RT_MEMHEAP_MASK) == RT_MEMHEAP_MAGIC);
+    /* check whether this block of memory has been over-written. */
+    RT_ASSERT((header_ptr->next->magic & RT_MEMHEAP_MASK) == RT_MEMHEAP_MAGIC);

    /* get pool ptr */
    heap = header_ptr->pool_ptr;