1 /* 2 * VMOBJINFO.C 3 * 4 * cc -I/usr/src/sys vmobjinfo.c -o /usr/local/bin/vmobjinfo -lkvm 5 * 6 * Dump all vm_object's in the system 7 * 8 * Copyright (c) 2010 The DragonFly Project. All rights reserved. 9 * 10 * This code is derived from software contributed to The DragonFly Project 11 * by Matthew Dillon <dillon@backplane.com> 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 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 22 * distribution. 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. 26 * 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 38 * SUCH DAMAGE. 39 */ 40 41 #define _KERNEL_STRUCTURES 42 #include <sys/param.h> 43 #include <sys/user.h> 44 #include <sys/malloc.h> 45 #include <sys/signalvar.h> 46 #include <sys/namecache.h> 47 #include <sys/mount.h> 48 #include <sys/vnode.h> 49 #include <sys/buf.h> 50 51 #include <vm/vm.h> 52 #include <vm/vm_page.h> 53 #include <vm/vm_kern.h> 54 #include <vm/vm_object.h> 55 #include <vm/swap_pager.h> 56 #include <vm/vnode_pager.h> 57 58 #include <vfs/ufs/quota.h> 59 #include <vfs/ufs/inode.h> 60 61 #include <stdio.h> 62 #include <stdlib.h> 63 #include <string.h> 64 #include <fcntl.h> 65 #include <kvm.h> 66 #include <nlist.h> 67 #include <getopt.h> 68 69 TAILQ_HEAD(object_q, vm_object); 70 71 struct nlist Nl[] = { 72 { "_vm_object_list" }, 73 { NULL } 74 }; 75 76 static void scan_vmobjs(kvm_t *kd, struct object_q *obj_list); 77 static void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes); 78 79 int 80 main(int ac, char **av) 81 { 82 struct object_q obj_list; 83 kvm_t *kd; 84 int i; 85 int ch; 86 const char *corefile = NULL; 87 const char *sysfile = NULL; 88 89 while ((ch = getopt(ac, av, "M:N:")) != -1) { 90 switch(ch) { 91 case 'M': 92 corefile = optarg; 93 break; 94 case 'N': 95 sysfile = optarg; 96 break; 97 default: 98 fprintf(stderr, "%s [-M core] [-N system]\n", av[0]); 99 exit(1); 100 } 101 } 102 103 if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) { 104 perror("kvm_open"); 105 exit(1); 106 } 107 if (kvm_nlist(kd, Nl) != 0) { 108 perror("kvm_nlist"); 109 exit(1); 110 } 111 kkread(kd, Nl[0].n_value, &obj_list, sizeof(obj_list)); 112 scan_vmobjs(kd, &obj_list); 113 return(0); 114 } 115 116 static void 117 scan_vmobjs(kvm_t *kd, struct object_q *obj_list) 118 { 119 struct vm_object *op; 120 struct vm_object obj; 121 122 op = TAILQ_FIRST(obj_list); 123 while (op) { 124 kkread(kd, (long)op, &obj, sizeof(obj)); 125 126 printf("%p type=%d size=%016jx handle=%p swblocks=%d\n", 127 op, obj.type, (intmax_t)obj.size, obj.handle, 128 obj.swblock_count); 129 130 op = TAILQ_NEXT(&obj, object_list); 131 } 132 } 133 134 static void 135 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes) 136 { 137 if (kvm_read(kd, addr, buf, nbytes) != nbytes) { 138 perror("kvm_read"); 139 exit(1); 140 } 141 } 142