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/*
* Copyright (c) 2013 Hudson River Trading LLC
* Written by: John H. Baldwin <jhb@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <stdlib.h>
#include <string.h>
#include "libutil.h"
struct kinfo_vmobject *
kinfo_getvmobject(int *cntp)
{
char *buf, *bp, *ep;
struct kinfo_vmobject *kvo, *list, *kp;
size_t len;
int cnt, i;
buf = NULL;
for (i = 0; i < 3; i++) {
if (sysctlbyname("vm.objects", NULL, &len, NULL, 0) < 0)
return (NULL);
buf = reallocf(buf, len);
if (buf == NULL)
return (NULL);
if (sysctlbyname("vm.objects", buf, &len, NULL, 0) == 0)
goto unpack;
if (errno != ENOMEM) {
free(buf);
return (NULL);
}
}
free(buf);
return (NULL);
unpack:
/* Count items */
cnt = 0;
bp = buf;
ep = buf + len;
while (bp < ep) {
kvo = (struct kinfo_vmobject *)(uintptr_t)bp;
bp += kvo->kvo_structsize;
cnt++;
}
list = calloc(cnt, sizeof(*list));
if (list == NULL) {
free(buf);
return (NULL);
}
/* Unpack */
bp = buf;
kp = list;
while (bp < ep) {
kvo = (struct kinfo_vmobject *)(uintptr_t)bp;
memcpy(kp, kvo, kvo->kvo_structsize);
bp += kvo->kvo_structsize;
kp->kvo_structsize = sizeof(*kp);
kp++;
}
free(buf);
*cntp = cnt;
return (list);
}
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