<malloc.h>: warn on unused results for malloc_usable_size().
Not a security problem, but definitely a bug if you're calling this and ignoring the result, since it has no side-effects.
(All of the more important functions -- realloc() especially -- are already annotated.)
Change-Id: I217463518b4716befcc0ed9426648eafbfbbdde4
diff --git a/libc/include/malloc.h b/libc/include/malloc.h
index ef1e27d..3ebc1be 100644
--- a/libc/include/malloc.h
+++ b/libc/include/malloc.h
@@ -110,7 +110,7 @@
* [malloc_usable_size(3)](http://man7.org/linux/man-pages/man3/malloc_usable_size.3.html)
* returns the actual size of the given heap block.
*/
-size_t malloc_usable_size(const void* _Nullable __ptr);
+size_t malloc_usable_size(const void* _Nullable __ptr) __wur;
#define __MALLINFO_BODY \
/** Total number of non-mmapped bytes currently allocated from OS. */ \