Re: [hatari-devel] ASAN issues with tests

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 01/08/2022 à 18:52, Eero Tamminen a écrit :
> Hi,
>
> On 30.7.2022 11.16, Thomas Huth wrote:
> > Ok, I think I've got it now: The problem was that the ST program could 
> > have
> > changed the video base address again between the point in time we 
> > recorded
> > the VideoBase variable and the point in time the rendering was done in
> > screenConvert.c. So the code in screenConvert.c must not use
> > Video_GetScreenBaseAddr() but has to use the vide base address value that
> > was recorded earlier. I've committed a patch - that will hopefully fix 
> > this
> > issue.
>
> You documented it as emulation fix, not emulator one.
>
> I think Hatari crashes in general are emulator issues, but I also 
> started to wonder what actually should happen in this case on real machine.
>
> Will ST just ignore rest of video accesses going out of ST-RAM, or 
> generate some kind of exception?

real ST won't crash when reading "outside" physical RAM. The displayed 
result depends on the model (STF will display a pattern based on the 
latest 16 bit word on the bus ; STE does similar thing, but differently :) )

I can't say for TT or Falcon.

Nicolas