================
@@ -932,6 +932,20 @@ An example of how to use ``alloc_size``
assert(__builtin_object_size(a, 0) == 100);
}
+When ``-Walloc-size`` is enabled, this attribute allows the compiler to
+diagnose cases when the allocated memory is insufficient for the size of the
+type the returned pointer is cast to.
+
+.. code-block:: c
+
+ void *my_malloc(int a) __attribute__((alloc_size(1)));
+ void consumer_func(int *);
+
+ int main() {
+ int *w = my_malloc(1); // warning: allocation of insufficient size '1' for
type 'int' with size '4'
----------------
vvuksanovic wrote:
Added
https://github.com/llvm/llvm-project/pull/150028
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