test/debug/kmapinfo.c

   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_real;
  77 vm_offset_t total_used_byid[VM_SUBSYS_LIMIT];
  78
  79 static const char *formatnum(int64_t value);
  80 static const char *entryid(vm_subsys_t id, int *realmemp);
  81 static void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
  82 static void mapscan(kvm_t *kd, vm_map_entry_t kptr, vm_map_entry_t ken,
  83                     vm_offset_t *lastp);
  84
  85 int
  86 main(int ac, char **av)
  87 {
  88     const char *corefile = NULL;
  89     const char *sysfile = NULL;
  90     kvm_t *kd;
  91     int ch;
  92     int i;
  93     vm_offset_t last;
  94     struct vm_map_entry entry;
  95     struct vm_map_entry *kptr;
  96
  97     while ((ch = getopt(ac, av, "M:N:dv")) != -1) {
  98         switch(ch) {
  99         case 'd':
 100             ++debugopt;
 101             break;
 102         case 'v':
 103             ++verboseopt;
 104             break;
 105         case 'M':
 106             corefile = optarg;
 107             break;
 108         case 'N':
 109             sysfile = optarg;
 110             break;
 111         default:
 112             fprintf(stderr, "%s [-M core] [-N system]\n", av[0]);
 113             exit(1);
 114         }
 115     }
 116     ac -= optind;
 117     av += optind;
 118
 119     if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) {
 120         perror("kvm_open");
 121         exit(1);
 122     }
 123     if (kvm_nlist(kd, Nl) != 0) {
 124         perror("kvm_nlist");
 125         exit(1);
 126     }
 127     kkread(kd, Nl[0].n_value, &kmap, sizeof(kmap));
 128     last = kmap.min_addr;
 129
 130     kptr = kvm_vm_map_entry_first(kd, &kmap, &entry);
 131     while (kptr) {
 132         mapscan(kd, kptr, &entry, &last);
 133         kptr = kvm_vm_map_entry_next(kd, kptr, &entry);
 134     }
 135
 136     printf("%4ldM 0x%016jx %08lx-%08lx (%6s) EMPTY\n",
 137         total_used / 1024 / 1024,
 138         (intmax_t)NULL,
 139         last, kmap.max_addr,
 140         formatnum(kmap.max_addr - last));
 141     total_empty += kmap.max_addr - last;
 142
 143     printf("-----------------------------------------------\n");
 144     for (i = 0; i < VM_SUBSYS_LIMIT; ++i) {
 145         int realmem;
 146         const char *id = entryid(i, &realmem);
 147
 148         printf("Total-id: %9s %s%s\n",
 149                 id,
 150                 formatnum(total_used_byid[i]),
 151                 (realmem ? " (real memory)" : ""));
 152     }
 153
 154     printf("-----------------------------------------------\n");
 155     printf("Total empty space: %s\n", formatnum(total_empty));
 156     printf("Total used  space: %s\n", formatnum(total_used));
 157     printf("Total real  space: %s\n", formatnum(total_real));
 158 }
 159
 160 static const char *
 161 formatnum(int64_t value)
 162 {
 163         static char buf[64];
 164         const char *neg;
 165         const char *suffix;
 166         int64_t div = 1;
 167
 168         if (value < 0) {
 169                 value = -value;
 170                 neg = "-";
 171         } else {
 172                 neg = "";
 173         }
 174         if (value < 100000) {
 175                 div = 1;
 176                 suffix = "";
 177         } else if (value < 1 * 1024 * 1024) {
 178                 div = 1024;
 179                 suffix = "K";
 180         } else if (value < 1024 * 1024 * 1024) {
 181                 div = 1024 * 1024;
 182                 suffix = "M";
 183         } else if (value < 1024LL * 1024 * 1024 * 1024) {
 184                 div = 1024 * 1024 * 1024;
 185                 suffix = "G";
 186         } else {
 187                 div = 1024LL * 1024 * 1024 * 1024;
 188                 suffix = "T";
 189         }
 190         if (value == 0) {
 191                 snprintf(buf, sizeof(buf), "");
 192         } else if (div == 1) {
 193                 snprintf(buf, sizeof(buf), "%s%7.0f%s",
 194                          neg,
 195                          (double)value / (double)div,
 196                          suffix);
 197         } else {
 198                 snprintf(buf, sizeof(buf), "%s%6.2f%s",
 199                          neg,
 200                          (double)value / (double)div,
 201                          suffix);
 202         }
 203         return buf;
 204 }
 205
 206 static void
 207 mapscan(kvm_t *kd, vm_map_entry_t kptr, vm_map_entry_t ken, vm_offset_t *lastp)
 208 {
 209     int realmem;
 210
 211     if (*lastp != ken->ba.start) {
 212             printf("%4ldM %p %08lx-%08lx (%s) EMPTY\n",
 213                 total_used / 1024 / 1024,
 214                 kptr,
 215                 *lastp, ken->ba.start,
 216                 formatnum(ken->ba.start - *lastp));
 217             total_empty += ken->ba.start - *lastp;
 218     }
 219     printf("%4ldM %p %08lx-%08lx (%6ldK) id=%-8s object=%p\n",
 220         total_used / 1024 / 1024,
 221         kptr,
 222         ken->ba.start, ken->ba.end,
 223         (ken->ba.end - ken->ba.start) / 1024,
 224         entryid(ken->id, &realmem),
 225         ken->ba.map_object);
 226     total_used += ken->ba.end - ken->ba.start;
 227
 228     if (ken->id < VM_SUBSYS_LIMIT)
 229         total_used_byid[ken->id] += ken->ba.end - ken->ba.start;
 230     else
 231         total_used_byid[0] += ken->ba.end - ken->ba.start;
 232
 233     if (realmem)
 234         total_real += ken->ba.end - ken->ba.start;
 235
 236     *lastp = ken->ba.end;
 237 }
 238
 239 static
 240 const char *
 241 entryid(vm_subsys_t id, int *realmemp)
 242 {
 243         static char buf[32];
 244         int dummy = 0;
 245         int *realmem = (realmemp ? realmemp : &dummy);
 246
 247         *realmem = 0;
 248
 249         switch(id) {
 250         case VM_SUBSYS_UNKNOWN:
 251                 return("UNKNOWN");
 252         case VM_SUBSYS_KMALLOC:
 253                 *realmem = 1;
 254                 return("KMALLOC");
 255         case VM_SUBSYS_STACK:
 256                 *realmem = 1;
 257                 return("STACK");
 258         case VM_SUBSYS_IMGACT:
 259                 return("IMGACT");
 260         case VM_SUBSYS_EFI:
 261                 return("EFI");
 262         case VM_SUBSYS_RESERVED:
 263                 *realmem = 1;
 264                 return("BOOT+KERN");
 265         case VM_SUBSYS_INIT:
 266                 return("INIT");
 267         case VM_SUBSYS_PIPE:
 268                 return("PIPE");
 269         case VM_SUBSYS_PROC:
 270                 return("PROC");
 271         case VM_SUBSYS_SHMEM:
 272                 return("SHMEM");
 273         case VM_SUBSYS_SYSMAP:
 274                 return("SYSMAP");
 275         case VM_SUBSYS_MMAP:
 276                 return("MMAP");
 277         case VM_SUBSYS_BRK:
 278                 return("BRK");
 279         case VM_SUBSYS_BOGUS:
 280                 return("BOGUS");
 281         case VM_SUBSYS_BUF:
 282                 *realmem = 1;
 283                 return("BUF");
 284         case VM_SUBSYS_BUFDATA:
 285                 return("BUFDATA");
 286         case VM_SUBSYS_GD:
 287                 *realmem = 1;
 288                 return("GD");
 289         case VM_SUBSYS_IPIQ:
 290                 *realmem = 1;
 291                 return("IPIQ");
 292         case VM_SUBSYS_PVENTRY:
 293                 return("PVENTRY");
 294         case VM_SUBSYS_PML4:
 295                 *realmem = 1;
 296                 return("PML4");
 297         case VM_SUBSYS_MAPDEV:
 298                 return("MAPDEV");
 299         case VM_SUBSYS_ZALLOC:
 300                 return("ZALLOC");
 301
 302         case VM_SUBSYS_DM:
 303                 return("DM");
 304         case VM_SUBSYS_CONTIG:
 305                 return("CONTIG");
 306         case VM_SUBSYS_DRM:
 307                 return("DRM");
 308         case VM_SUBSYS_DRM_GEM:
 309                 return("DRM_GEM");
 310         case VM_SUBSYS_DRM_SCAT:
 311                 return("DRM_SCAT");
 312         case VM_SUBSYS_DRM_VMAP:
 313                 *realmem = 1;
 314                 return("DRM_VMAP");
 315         case VM_SUBSYS_DRM_TTM:
 316                 return("DRM_TTM");
 317         case VM_SUBSYS_HAMMER:
 318                 return("HAMMER");
 319         case VM_SUBSYS_VMPGHASH:
 320                 *realmem = 1;
 321                 return("VMPGHASH");
 322         default:
 323                 break;
 324         }
 325         snprintf(buf, sizeof(buf), "%d", (int)id);
 326
 327         return buf;
 328 }
 329
 330
 331 static void
 332 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
 333 {
 334     if (kvm_read(kd, addr, buf, nbytes) != nbytes) {
 335         perror("kvm_read");
 336         exit(1);
 337     }
 338 }