[Bug libc/12232] setrlimit interferes with malloc

["bkorb at gnu dot org" <sourceware-bugzilla@sourceware.org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=12232

--- Comment #11 from Bruce Korb <bkorb at gnu dot org> 2011-01-07 23:31:06 UTC ---
One more data point.  The following program does not show
the problem.  So, calling free(malloc(0x88)) clears the issue
and the following code doesn't stumble.

#define NUM_ROUNDS 1000
#define MAX_ALLOC_ROUND 10000
#define MAX_ALLOC_TOTAL (NUM_ROUNDS * MAX_ALLOC_ROUND)

int
main(int argc, char ** argv)
{
    struct rlimit limit;
    if (getrlimit (RLIMIT_AS, &limit) < 0)
        return 77;
    if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > MAX_ALLOC_TOTAL)
        limit.rlim_max = MAX_ALLOC_TOTAL;
    limit.rlim_cur = limit.rlim_max;
    if (setrlimit (RLIMIT_AS, &limit) < 0)
        return 77;
    if (dprintf (STDOUT_FILENO, "%011000d\n", 17) == -1
        && errno == ENOMEM)
        return 1;

    return 0;
}

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