Re: Locking processes against being killed when low on memory

["Steven M. Bellovin" <smb%cs.columbia.edu@localhost>]

On Fri, 22 Feb 2008 15:34:52 +0000
Patrick Welche <prlw1%newn.cam.ac.uk@localhost> wrote:

> On Fri, Feb 22, 2008 at 12:14:48PM +0000, Steven M. Bellovin wrote:
> > I'll try, but with no message and no dump that isn't easy...
> 
> Post the program? (Have serial console...)

It's a laptop with no serial port.  It's also my only amd64 machine...

As for the code -- attached.  It's nothing fancy....
> 
> Patrick



                --Steve Bellovin, http://www.cs.columbia.edu/~smb

#include <stdio.h>
#include <stdlib.h>

const char *_malloc_options = "Z";
#define chunk ((size_t) 1024*1024)

main(int argc, char *argv[])
{
        void *p, *lp = NULL;
        int i = 0;
        int lim = 2560;

        if (argc > 1) lim = atoi(argv[1]);
        printf("Starting: %d...\n", lim);
        fflush(stdout);
        while (i < lim && (p = malloc(chunk)) != NULL) {
                lp = p;
                i++;
        }
        if (lp) free(lp);
        printf("Done: %d\n", i);
        return 0;
}