4 * cc -I/usr/src/sys kmapinfo.c -o /usr/local/bin/kmapinfo -lkvm
8 * Copyright (c) 2010 The DragonFly Project. All rights reserved.
10 * This code is derived from software contributed to The DragonFly Project
11 * by Matthew Dillon <dillon@backplane.com>
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in
21 * the documentation and/or other materials provided with the
23 * 3. Neither the name of The DragonFly Project nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific, prior written permission.
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
30 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
31 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
32 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
33 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
34 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
35 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
36 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
37 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
41 #define _KERNEL_STRUCTURES_
42 #include <sys/param.h>
44 #include <sys/malloc.h>
45 #include <sys/signalvar.h>
46 #include <sys/vnode.h>
47 #include <sys/namecache.h>
50 #include <vm/vm_page.h>
51 #include <vm/vm_kern.h>
52 #include <vm/vm_page.h>
53 #include <vm/vm_object.h>
54 #include <vm/vm_map.h>
55 #include <vm/swap_pager.h>
56 #include <vm/vnode_pager.h>
74 vm_offset_t total_empty;
75 vm_offset_t total_used;
77 static void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
78 static void mapscan(kvm_t *kd, vm_map_entry_t entry,
82 main(int ac, char **av)
84 const char *corefile = NULL;
85 const char *sysfile = NULL;
97 while ((ch = getopt(ac, av, "M:N:dv")) != -1) {
112 fprintf(stderr, "%s [-M core] [-N system]\n", av[0]);
119 if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) {
123 if (kvm_nlist(kd, Nl) != 0) {
127 kkread(kd, Nl[0].n_value, &kmap, sizeof(kmap));
128 last = kmap.header.start;
129 mapscan(kd, kmap.rb_root.rbh_root, &last);
131 printf("%4ldM 0x%016jx %08lx-%08lx (%6ldK) EMPTY\n",
132 total_used / 1024 / 1024,
134 last, kmap.header.end,
135 (kmap.header.end - last) / 1024);
136 total_empty += kmap.header.end - last;
138 printf("-----------------------------------------------\n");
139 printf("Total empty space: %7ldK\n", total_empty / 1024);
140 printf("Total used space: %7ldK\n", total_used / 1024);
144 mapscan(kvm_t *kd, vm_map_entry_t entryp, vm_offset_t *lastp)
146 struct vm_map_entry entry;
150 kkread(kd, (u_long)entryp, &entry, sizeof(entry));
151 mapscan(kd, entry.rb_entry.rbe_left, lastp);
152 if (*lastp != entry.start) {
153 printf("%4ldM %p %08lx-%08lx (%6ldK) EMPTY\n",
154 total_used / 1024 / 1024,
157 (entry.start - *lastp) / 1024);
158 total_empty += entry.start - *lastp;
160 printf("%4ldM %p %08lx-%08lx (%6ldK) type=%d object=%p\n",
161 total_used / 1024 / 1024,
163 entry.start, entry.end,
164 (entry.end - entry.start) / 1024,
167 total_used += entry.end - entry.start;
169 mapscan(kd, entry.rb_entry.rbe_right, lastp);
173 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
175 if (kvm_read(kd, addr, buf, nbytes) != nbytes) {