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 #include <sys/types.h>
30 #include <sys/sysctl.h>
31 #include <sys/user.h>
32 #include <stdlib.h>
33 #include <string.h>
34
35 #include "libutil.h"
36
37 static struct kinfo_vmobject *
kinfo_getvmobject_impl(int * cntp,const char * vmobjsysctl)38 kinfo_getvmobject_impl(int *cntp, const char *vmobjsysctl)
39 {
40 char *buf, *bp, *ep;
41 struct kinfo_vmobject *kvo, *list, *kp;
42 size_t len;
43 int cnt, i;
44
45 buf = NULL;
46 for (i = 0; i < 3; i++) {
47 if (sysctlbyname(vmobjsysctl, NULL, &len, NULL, 0) < 0) {
48 free(buf);
49 return (NULL);
50 }
51 buf = reallocf(buf, len);
52 if (buf == NULL)
53 return (NULL);
54 if (sysctlbyname(vmobjsysctl, buf, &len, NULL, 0) == 0)
55 goto unpack;
56 if (errno != ENOMEM) {
57 free(buf);
58 return (NULL);
59 }
60 }
61 free(buf);
62 return (NULL);
63
64 unpack:
65 /* Count items */
66 cnt = 0;
67 bp = buf;
68 ep = buf + len;
69 while (bp < ep) {
70 kvo = (struct kinfo_vmobject *)(uintptr_t)bp;
71 bp += kvo->kvo_structsize;
72 cnt++;
73 }
74
75 list = calloc(cnt, sizeof(*list));
76 if (list == NULL) {
77 free(buf);
78 return (NULL);
79 }
80
81 /* Unpack */
82 bp = buf;
83 kp = list;
84 while (bp < ep) {
85 kvo = (struct kinfo_vmobject *)(uintptr_t)bp;
86 memcpy(kp, kvo, kvo->kvo_structsize);
87 bp += kvo->kvo_structsize;
88 kp->kvo_structsize = sizeof(*kp);
89 kp++;
90 }
91 free(buf);
92 *cntp = cnt;
93 return (list);
94 }
95
96 struct kinfo_vmobject *
kinfo_getvmobject(int * cntp)97 kinfo_getvmobject(int *cntp)
98 {
99 return (kinfo_getvmobject_impl(cntp, "vm.objects"));
100 }
101
102 struct kinfo_vmobject *
kinfo_getswapvmobject(int * cntp)103 kinfo_getswapvmobject(int *cntp)
104 {
105 return (kinfo_getvmobject_impl(cntp, "vm.swap_objects"));
106 }
107