memheap: check against over written in rt_memheap_free

f8c171d5 · Grissiom · 571095e8 · f8c171d5
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src/memheap.c src/memheap.c +2 -0

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--- 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;