On Thu, Mar 04, 2021 at 04:44:34PM +0100, maranget wrote: > > > > On 3 Mar 2021, at 21:22, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: > > > >>> > >>> Local variables absolutely should be treated just like CPU registers, if > >>> possible. In fact, the compiler has the option of keeping local > >>> variables stored in registers. > >>> > >>> (Of course, things may get complicated if anyone writes a litmus test > >>> that uses a pointer to a local variable, Especially if the pointer > >>> could hold the address of a local variable in one execution and a > >>> shared variable in another! Or if the pointer is itself a shared > >>> variable and is dereferenced in another thread!) > >> > >> Good point! I did miss this complication. ;-) > > > > I suspect it wouldn't be so bad if herd7 disallowed taking addresses of > > local variables. > > Herd7 does disallow taking addresses of local variables. Good to know, and thank you! > However, such tests can still be run on machine, provided function bodies are accepted by the C compiler. True, but that would be outside of the LKMM proper, correct? Thanx, Paul
