Handling argc==0 in the kernel
Handling argc==0 in the kernel
Posted Jan 29, 2022 11:22 UTC (Sat) by mchapman (subscriber, #66589)In reply to: Handling argc==0 in the kernel by matthias
Parent article: Handling argc==0 in the kernel
> Writing &*a is UB if a is an invalid pointer, even if the combination of & and * should be a no-op.
No, this is not correct.
C specifies that &*a is equivalent to a: "neither [the * operator] nor the & operator is evaluated and the result is as if both were omitted". This expression is valid for any value of a, even a null pointer.