Re: [RFC] a prototype checkpoint-restart using core files

Daniel Jacobowitz
2005-11-07T19:07:35Z

On Mon, Nov 07, 2005 at 07:57:25PM +0100, Mark Kettenis wrote:
> Heh, I'd expected Eli to ask for documentation ;-)
>
> Anyway, in this cause I think that's important since I expect a lot of
> users won't understand its limitations.
>
> If I read the code correctly, there is one rather serious limitation
> though: restoring mmapped area's will fail if the same area isn't
> mapped in the target process. Especially on systems that randomize
> the location of mmapped memory this will make the usefullness of this
> feature pretty limited :(.

Why should it? The expected use is to restore these dumps into the
same running session - just after stepping a bit. So unless you step
across a very large free(), it should be fine.

I admit the general-purpose rcore command has a lot of limitations, but
not as part of a checkpoint-restart system.

--
Daniel Jacobowitz
CodeSourcery, LLC