Re: [Qemu-devel] [PULL 02/18] replay: internal functions for replay log

["Pavel Dovgalyuk" <dovgaluk@ispras.ru>]

> From: Paolo Bonzini [mailto:pbonzini@redhat.com]
> On 11/05/2018 11:27, Peter Maydell wrote:
> >> +uint8_t replay_get_byte(void)
> >> +{
> >> +    uint8_t byte = 0;
> >> +    if (replay_file) {
> >> +        byte = getc(replay_file);
> >> +    }
> >> +    return byte;
> >> +}
> > Coverity (CID 1390576) points out that this function isn't checking
> > the error return from getc(). That means we could incorrectly return
> > 255 from here and then the return value from replay_get_dword would
> > be 0xffffffff, which is unfortunate if the place that's using
> > that uses it as a loop boundary.
> 
> Thanks!  Pavel can you check it?  How is error checking done in general
> for record/replay, should QEMU exit immediately?

Yes, usually there is no sense continuing the replayed execution
in case of an io error. Therefore closing QEMU is fine.

Pavel Dovgalyuk