1 /*
2 * Copyright (c) 2013 Hudson River Trading LLC
3 * Written by: John H. Baldwin <[email protected]>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/types.h>
32 #include <sys/sysctl.h>
33 #include <sys/user.h>
34 #include <stdlib.h>
35 #include <string.h>
36
37 #include "libutil.h"
38
39 struct kinfo_vmobject *
kinfo_getvmobject(int * cntp)40 kinfo_getvmobject(int *cntp)
41 {
42 char *buf, *bp, *ep;
43 struct kinfo_vmobject *kvo, *list, *kp;
44 size_t len;
45 int cnt, i;
46
47 buf = NULL;
48 for (i = 0; i < 3; i++) {
49 if (sysctlbyname("vm.objects", NULL, &len, NULL, 0) < 0) {
50 free(buf);
51 return (NULL);
52 }
53 buf = reallocf(buf, len);
54 if (buf == NULL)
55 return (NULL);
56 if (sysctlbyname("vm.objects", buf, &len, NULL, 0) == 0)
57 goto unpack;
58 if (errno != ENOMEM) {
59 free(buf);
60 return (NULL);
61 }
62 }
63 free(buf);
64 return (NULL);
65
66 unpack:
67 /* Count items */
68 cnt = 0;
69 bp = buf;
70 ep = buf + len;
71 while (bp < ep) {
72 kvo = (struct kinfo_vmobject *)(uintptr_t)bp;
73 bp += kvo->kvo_structsize;
74 cnt++;
75 }
76
77 list = calloc(cnt, sizeof(*list));
78 if (list == NULL) {
79 free(buf);
80 return (NULL);
81 }
82
83 /* Unpack */
84 bp = buf;
85 kp = list;
86 while (bp < ep) {
87 kvo = (struct kinfo_vmobject *)(uintptr_t)bp;
88 memcpy(kp, kvo, kvo->kvo_structsize);
89 bp += kvo->kvo_structsize;
90 kp->kvo_structsize = sizeof(*kp);
91 kp++;
92 }
93 free(buf);
94 *cntp = cnt;
95 return (list);
96 }
97