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Re: [PATCH] Set behavior of sprintf-like functions with overlapping source and destination
On 27/12/18 12:26 AM, Paul Eggert wrote:
It may not be too hard for the compiler to see this undefined
behaviour and warn about it either, at least in some trivial cases...
Yes, that'd be good.
Turns out the compiler does identify aliases in this case (although in
a very generic way because of which the warning may not be super-clear
to a lot of devs at first glance):
foo.c:9:11: warning: passing argument 1 to restrict-qualified parameter
aliases with argument 3 [-Wrestrict]
sprintf(buf, "%sCD", buf);
^~~ ~~~
So I suppose we have this part covered.
Siddhesh