Re: Core dumps & restarting

H. Peter Anvin (
29 Oct 1996 19:27:30 GMT

Followup to: <>
By author:
In newsgroup:
> On Mon, 28 Oct 1996, Eduardo Diaz Comellas wrote:
> > Hi!
> >
> > I was wandering how to stop a process, reboot the machine, and
> > restart that process. Is there a way to provoke a program to dump
> > itself, and restart it after the reboot?
> >
> > Maybe we can define a new executable format for it to work ;-)
> >
> > Cheers!
> This would be practically impossible as you'd have to load the program
> into the exact same memory space or all of its pointers would be bad...
> Memory fragmentation issues would make it very hard to get any program to
> occupy the exact same space it did before.

Not at all. All the pointers are referring to virtual memory, which
is customized for each process anyway. You can force a process to
dump core by sending it a SIGQUIT; you can then use gdb to restart it,
or use a program called "undump" to turn it into an executable.
However, the program will have lost all file descriptors, so it needs
to be written to accommodate that.


Not speaking for Transmeta in any shape, way, or form.