LWN wrote: > Marking places where unsigned overflow is expected is needed; it would be > nice to get those annotations put into the kernel, Cook said.
Let's discuss the most important part -- naming :^) In my opinion, signed universe should _not_ get anything before specific examples are presented where the value is in fact can be negative and can overflow. As for size_t/uintptr_t/..., they can be added as usize_w Rust-style or left until someone presents a usecase --- a/include/linux/types.h +++ b/include/linux/types.h @@ -119,6 +119,18 @@ typedef s64 int64_t; #define aligned_be64 __aligned_be64 #define aligned_le64 __aligned_le64 +#ifdef __CHECKER__ // change to sanitizer define +#define __wrap __attribute__((whatever)) +#else +#define __wrap +#endif +/* wrapping is OK */ +typedef u8 __wrap u8w; +typedef u16 __wrap u16w; +typedef u32 __wrap u32w; +typedef u64 __wrap u64w; +typedef unsigned long __wrap unsigned_long_w; // name sucks but consistently so + /** * The type used for indexing onto a disc or disc partition. *
