1 /*
2 * Copyright (c) 2013 Hudson River Trading LLC
3 * Written by: John H. Baldwin <jhb@FreeBSD.org>
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/types.h>
29 #include <sys/sysctl.h>
30 #include <sys/user.h>
31 #include <stdlib.h>
32 #include <string.h>
33
34 #include "libutil.h"
35
36 static struct kinfo_vmobject *
kinfo_getvmobject_impl(int * cntp,const char * vmobjsysctl)37 kinfo_getvmobject_impl(int *cntp, const char *vmobjsysctl)
38 {
39 char *buf, *bp, *ep;
40 struct kinfo_vmobject *kvo, *list, *kp;
41 size_t len;
42 int cnt, i;
43
44 buf = NULL;
45 for (i = 0; i < 3; i++) {
46 if (sysctlbyname(vmobjsysctl, NULL, &len, NULL, 0) < 0) {
47 free(buf);
48 return (NULL);
49 }
50 buf = reallocf(buf, len);
51 if (buf == NULL)
52 return (NULL);
53 if (sysctlbyname(vmobjsysctl, buf, &len, NULL, 0) == 0)
54 goto unpack;
55 if (errno != ENOMEM) {
56 free(buf);
57 return (NULL);
58 }
59 }
60 free(buf);
61 return (NULL);
62
63 unpack:
64 /* Count items */
65 cnt = 0;
66 bp = buf;
67 ep = buf + len;
68 while (bp < ep) {
69 kvo = (struct kinfo_vmobject *)(uintptr_t)bp;
70 bp += kvo->kvo_structsize;
71 cnt++;
72 }
73
74 list = calloc(cnt, sizeof(*list));
75 if (list == NULL) {
76 free(buf);
77 return (NULL);
78 }
79
80 /* Unpack */
81 bp = buf;
82 kp = list;
83 while (bp < ep) {
84 kvo = (struct kinfo_vmobject *)(uintptr_t)bp;
85 memcpy(kp, kvo, kvo->kvo_structsize);
86 bp += kvo->kvo_structsize;
87 kp->kvo_structsize = sizeof(*kp);
88 kp++;
89 }
90 free(buf);
91 *cntp = cnt;
92 return (list);
93 }
94
95 struct kinfo_vmobject *
kinfo_getvmobject(int * cntp)96 kinfo_getvmobject(int *cntp)
97 {
98 return (kinfo_getvmobject_impl(cntp, "vm.objects"));
99 }
100
101 struct kinfo_vmobject *
kinfo_getswapvmobject(int * cntp)102 kinfo_getswapvmobject(int *cntp)
103 {
104 return (kinfo_getvmobject_impl(cntp, "vm.swap_objects"));
105 }
106