#include <sys/cdefs.h>
#ifdef __FBSDID
__FBSDID("$FreeBSD: head/lib/libutil/kinfo_getvmmap.c 186512 2008-12-27 11:12:23Z rwatson $");
#endif
__RCSID("$NetBSD: kinfo_getvmmap.c,v 1.4 2017/06/14 12:24:51 kamil Exp $");

#include <sys/param.h>
#include <sys/sysctl.h>
#include <stdlib.h>
#include <string.h>
#include <util.h>
#include <uvm/uvm_param.h>

struct kinfo_vmentry *
kinfo_getvmmap(pid_t pid, size_t *cntp)
{
        int mib[5];
        int error;
        size_t len;
        struct kinfo_vmentry *kiv;

        *cntp = 0;
        len = 0;
        mib[0] = CTL_VM;
        mib[1] = VM_PROC;
        mib[2] = VM_PROC_MAP;
        mib[3] = pid;
        mib[4] = sizeof(*kiv);

        error = sysctl(mib, (u_int)__arraycount(mib), NULL, &len, NULL, 0);
        if (error)
                return NULL;

        len = len * 4 / 3;

        kiv = malloc(len);
        if (kiv == NULL)
                return NULL;

        error = sysctl(mib, (u_int)__arraycount(mib), kiv, &len, NULL, 0);
        if (error) {
                free(kiv);
                return NULL;
        }

        *cntp = len / sizeof(*kiv);
        return kiv;     /* Caller must free() return value */
}