[Kernel][memheap] fix rt_realloc bugs
missing free old memory after malloc new
free memory when new size is zero
@@ -659,6 +659,12 @@ void *rt_realloc(void *rmem, rt_size_t newsize)
if (rmem == RT_NULL)
return rt_malloc(newsize);
+ if (newsize == 0)
+ {
+ rt_free(rmem);
+ return RT_NULL;
+ }
+
/* get old memory item */
header_ptr = (struct rt_memheap_item *)
((rt_uint8_t *)rmem - RT_MEMHEAP_SIZE);
@@ -678,6 +684,8 @@ void *rt_realloc(void *rmem, rt_size_t newsize)
rt_memcpy(new_ptr, rmem, oldsize);
else
rt_memcpy(new_ptr, rmem, newsize);
+
+ rt_free(rmem);
}
}
