1 /* 2 * KMAPINFO.C 3 * 4 * cc -I/usr/src/sys kmapinfo.c -o ~/bin/kmapinfo -lkvm 5 * 6 * Dump the kernel_map 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/vnode.h> 47 #include <sys/namecache.h> 48 49 #include <vm/vm.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> 57 58 #include <stdio.h> 59 #include <stdlib.h> 60 #include <string.h> 61 #include <fcntl.h> 62 #include <kvm.h> 63 #include <nlist.h> 64 #include <getopt.h> 65 66 struct nlist Nl[] = { 67 { "_kernel_map" }, 68 { NULL } 69 }; 70 71 int debugopt; 72 int verboseopt; 73 struct vm_map kmap; 74 vm_offset_t total_empty; 75 vm_offset_t total_used; 76 vm_offset_t total_used_byid[VM_SUBSYS_LIMIT]; 77 78 static const char *formatnum(int64_t value); 79 static const char *entryid(vm_subsys_t id); 80 static void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes); 81 static void mapscan(kvm_t *kd, vm_map_entry_t kptr, vm_map_entry_t ken, 82 vm_offset_t *lastp); 83 84 int 85 main(int ac, char **av) 86 { 87 const char *corefile = NULL; 88 const char *sysfile = NULL; 89 kvm_t *kd; 90 int ch; 91 int i; 92 vm_offset_t last; 93 struct vm_map_entry entry; 94 struct vm_map_entry *kptr; 95 96 while ((ch = getopt(ac, av, "M:N:dv")) != -1) { 97 switch(ch) { 98 case 'd': 99 ++debugopt; 100 break; 101 case 'v': 102 ++verboseopt; 103 break; 104 case 'M': 105 corefile = optarg; 106 break; 107 case 'N': 108 sysfile = optarg; 109 break; 110 default: 111 fprintf(stderr, "%s [-M core] [-N system]\n", av[0]); 112 exit(1); 113 } 114 } 115 ac -= optind; 116 av += optind; 117 118 if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) { 119 perror("kvm_open"); 120 exit(1); 121 } 122 if (kvm_nlist(kd, Nl) != 0) { 123 perror("kvm_nlist"); 124 exit(1); 125 } 126 kkread(kd, Nl[0].n_value, &kmap, sizeof(kmap)); 127 last = kmap.min_addr; 128 129 kptr = kvm_vm_map_entry_first(kd, &kmap, &entry); 130 while (kptr) { 131 mapscan(kd, kptr, &entry, &last); 132 kptr = kvm_vm_map_entry_next(kd, kptr, &entry); 133 } 134 135 printf("%4ldM 0x%016jx %08lx-%08lx (%6s) EMPTY\n", 136 total_used / 1024 / 1024, 137 (intmax_t)NULL, 138 last, kmap.max_addr, 139 formatnum(kmap.max_addr - last)); 140 total_empty += kmap.max_addr - last; 141 142 printf("-----------------------------------------------\n"); 143 for (i = 0; i < VM_SUBSYS_LIMIT; ++i) 144 printf("Total-id: %9s %s\n", entryid(i), formatnum(total_used_byid[i])); 145 146 printf("-----------------------------------------------\n"); 147 printf("Total empty space: %s\n", formatnum(total_empty)); 148 printf("Total used space: %s\n", formatnum(total_used)); 149 } 150 151 static const char * 152 formatnum(int64_t value) 153 { 154 static char buf[64]; 155 const char *neg; 156 const char *suffix; 157 int64_t div = 1; 158 159 if (value < 0) { 160 value = -value; 161 neg = "-"; 162 } else { 163 neg = ""; 164 } 165 if (value < 100000) { 166 div = 1; 167 suffix = ""; 168 } else if (value < 1 * 1024 * 1024) { 169 div = 1024; 170 suffix = "K"; 171 } else if (value < 1024 * 1024 * 1024) { 172 div = 1024 * 1024; 173 suffix = "M"; 174 } else if (value < 1024LL * 1024 * 1024 * 1024) { 175 div = 1024 * 1024 * 1024; 176 suffix = "G"; 177 } else { 178 div = 1024LL * 1024 * 1024 * 1024; 179 suffix = "T"; 180 } 181 if (value == 0) { 182 snprintf(buf, sizeof(buf), ""); 183 } else if (div == 1) { 184 snprintf(buf, sizeof(buf), "%s%7.0f%s", 185 neg, 186 (double)value / (double)div, 187 suffix); 188 } else { 189 snprintf(buf, sizeof(buf), "%s%6.2f%s", 190 neg, 191 (double)value / (double)div, 192 suffix); 193 } 194 return buf; 195 } 196 197 static void 198 mapscan(kvm_t *kd, vm_map_entry_t kptr, vm_map_entry_t ken, vm_offset_t *lastp) 199 { 200 if (*lastp != ken->start) { 201 printf("%4ldM %p %08lx-%08lx (%s) EMPTY\n", 202 total_used / 1024 / 1024, 203 kptr, 204 *lastp, ken->start, 205 formatnum(ken->start - *lastp)); 206 total_empty += ken->start - *lastp; 207 } 208 printf("%4ldM %p %08lx-%08lx (%6ldK) id=%-8s object=%p\n", 209 total_used / 1024 / 1024, 210 kptr, 211 ken->start, ken->end, 212 (ken->end - ken->start) / 1024, 213 entryid(ken->id), 214 ken->object.map_object); 215 total_used += ken->end - ken->start; 216 if (ken->id < VM_SUBSYS_LIMIT) 217 total_used_byid[ken->id] += ken->end - ken->start; 218 else 219 total_used_byid[0] += ken->end - ken->start; 220 *lastp = ken->end; 221 } 222 223 static 224 const char * 225 entryid(vm_subsys_t id) 226 { 227 static char buf[32]; 228 229 switch(id) { 230 case VM_SUBSYS_UNKNOWN: 231 return("UNKNOWN"); 232 case VM_SUBSYS_KMALLOC: 233 return("KMALLOC"); 234 case VM_SUBSYS_STACK: 235 return("STACK"); 236 case VM_SUBSYS_IMGACT: 237 return("IMGACT"); 238 case VM_SUBSYS_EFI: 239 return("EFI"); 240 case VM_SUBSYS_RESERVED: 241 return("RESERVED"); 242 case VM_SUBSYS_INIT: 243 return("INIT"); 244 case VM_SUBSYS_PIPE: 245 return("PIPE"); 246 case VM_SUBSYS_PROC: 247 return("PROC"); 248 case VM_SUBSYS_SHMEM: 249 return("SHMEM"); 250 case VM_SUBSYS_SYSMAP: 251 return("SYSMAP"); 252 case VM_SUBSYS_MMAP: 253 return("MMAP"); 254 case VM_SUBSYS_BRK: 255 return("BRK"); 256 case VM_SUBSYS_BOGUS: 257 return("BOGUS"); 258 case VM_SUBSYS_BUF: 259 return("BUF"); 260 case VM_SUBSYS_BUFDATA: 261 return("BUFDATA"); 262 case VM_SUBSYS_GD: 263 return("GD"); 264 case VM_SUBSYS_IPIQ: 265 return("IPIQ"); 266 case VM_SUBSYS_PVENTRY: 267 return("PVENTRY"); 268 case VM_SUBSYS_PML4: 269 return("PML4"); 270 case VM_SUBSYS_MAPDEV: 271 return("MAPDEV"); 272 case VM_SUBSYS_ZALLOC: 273 return("ZALLOC"); 274 275 case VM_SUBSYS_DM: 276 return("DM"); 277 case VM_SUBSYS_CONTIG: 278 return("CONTIG"); 279 case VM_SUBSYS_DRM: 280 return("DRM"); 281 case VM_SUBSYS_DRM_GEM: 282 return("DRM_GEM"); 283 case VM_SUBSYS_DRM_SCAT: 284 return("DRM_SCAT"); 285 case VM_SUBSYS_DRM_VMAP: 286 return("DRM_VMAP"); 287 case VM_SUBSYS_DRM_TTM: 288 return("DRM_TTM"); 289 case VM_SUBSYS_HAMMER: 290 return("HAMMER"); 291 case VM_SUBSYS_VMPGHASH: 292 return("VMPGHASH"); 293 default: 294 break; 295 } 296 snprintf(buf, sizeof(buf), "%d", (int)id); 297 298 return buf; 299 } 300 301 302 static void 303 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes) 304 { 305 if (kvm_read(kd, addr, buf, nbytes) != nbytes) { 306 perror("kvm_read"); 307 exit(1); 308 } 309 } 310