4 * cc -I/usr/src/sys vmpageinfo.c -o /usr/local/bin/vmpageinfo -lkvm
8 * Validate the vm_page_buckets[] hash array against the vm_page_array
11 * Copyright (c) 2004 The DragonFly Project. All rights reserved.
13 * This code is derived from software contributed to The DragonFly Project
14 * by Matthew Dillon <dillon@backplane.com>
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
20 * 1. Redistributions of source code must retain the above copyright
21 * notice, this list of conditions and the following disclaimer.
22 * 2. Redistributions in binary form must reproduce the above copyright
23 * notice, this list of conditions and the following disclaimer in
24 * the documentation and/or other materials provided with the
26 * 3. Neither the name of The DragonFly Project nor the names of its
27 * contributors may be used to endorse or promote products derived
28 * from this software without specific, prior written permission.
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
31 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
32 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
33 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
34 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
35 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
36 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
37 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
38 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
39 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
40 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 * $DragonFly: src/test/debug/vmpageinfo.c,v 1.2 2006/05/23 01:00:05 dillon Exp $
46 #define _KERNEL_STRUCTURES_
47 #include <sys/param.h>
49 #include <sys/malloc.h>
50 #include <sys/signalvar.h>
51 #include <sys/vnode.h>
52 #include <sys/namecache.h>
55 #include <vm/vm_page.h>
56 #include <vm/vm_kern.h>
57 #include <vm/vm_page.h>
58 #include <vm/vm_object.h>
59 #include <vm/swap_pager.h>
60 #include <vm/vnode_pager.h>
72 { "_vm_page_buckets" },
73 { "_vm_page_hash_mask" },
76 { "_vm_page_array_size" },
83 struct vm_page **vm_page_buckets;
84 int vm_page_hash_mask;
86 struct vm_page *vm_page_array;
87 int vm_page_array_size;
89 void checkpage(kvm_t *kd, vm_page_t mptr, vm_page_t m, struct vm_object *obj);
90 void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
93 main(int ac, char **av)
95 const char *corefile = NULL;
96 const char *sysfile = NULL;
107 while ((ch = getopt(ac, av, "M:N:dv")) != -1) {
122 fprintf(stderr, "%s [-M core] [-N system]\n", av[0]);
129 if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) {
133 if (kvm_nlist(kd, Nl) != 0) {
139 kkread(kd, Nl[0].n_value, &vm_page_buckets, sizeof(vm_page_buckets));
140 kkread(kd, Nl[1].n_value, &vm_page_hash_mask, sizeof(vm_page_hash_mask));
142 kkread(kd, Nl[0].n_value, &vm_page_array, sizeof(vm_page_array));
143 kkread(kd, Nl[1].n_value, &vm_page_array_size, sizeof(vm_page_array_size));
146 * Scan the vm_page_array validating all pages with associated objects
148 for (i = 0; i < vm_page_array_size; ++i) {
150 printf("page %d\r", i);
153 kkread(kd, (u_long)&vm_page_array[i], &m, sizeof(m));
155 kkread(kd, (u_long)m.object, &obj, sizeof(obj));
156 checkpage(kd, &vm_page_array[i], &m, &obj);
159 if (m.queue >= PQ_HOLD) {
161 } else if (m.queue >= PQ_CACHE) {
163 } else if (m.queue >= PQ_ACTIVE) {
165 } else if (m.queue >= PQ_INACTIVE) {
167 } else if (m.queue >= PQ_FREE) {
172 printf("page %p obj %p/%-8jd val=%02x dty=%02x hold=%d "
173 "wire=%-2d act=%-3d busy=%d %8s",
212 printf(" %-7s", ostr);
213 if (m.flags & PG_BUSY)
215 if (m.flags & PG_WANTED)
217 if (m.flags & PG_WINATCFLS)
218 printf(" WINATCFLS");
219 if (m.flags & PG_FICTITIOUS)
220 printf(" FICTITIOUS");
221 if (m.flags & PG_WRITEABLE)
222 printf(" WRITEABLE");
223 if (m.flags & PG_MAPPED)
225 if (m.flags & PG_ZERO)
227 if (m.flags & PG_REFERENCED)
228 printf(" REFERENCED");
229 if (m.flags & PG_CLEANCHK)
231 if (m.flags & PG_SWAPINPROG)
232 printf(" SWAPINPROG");
233 if (m.flags & PG_NOSYNC)
235 if (m.flags & PG_UNMANAGED)
236 printf(" UNMANAGED");
237 if (m.flags & PG_MARKER)
239 if (m.flags & PG_RAM)
241 if (m.flags & PG_SWAPPED)
246 if (debugopt || verboseopt)
251 * Scan the vm_page_buckets array validating all pages found
253 for (i = 0; i <= vm_page_hash_mask; ++i) {
255 printf("index %d\r", i);
258 kkread(kd, (u_long)&vm_page_buckets[i], &mptr, sizeof(mptr));
260 kkread(kd, (u_long)mptr, &m, sizeof(m));
262 kkread(kd, (u_long)m.object, &obj, sizeof(obj));
263 hv = ((uintptr_t)m.object + m.pindex) ^ obj.hash_rand;
264 hv &= vm_page_hash_mask;
266 printf("vm_page_buckets[%d] ((struct vm_page *)%p)"
267 " should be in bucket %d\n", i, mptr, hv);
268 checkpage(kd, mptr, &m, &obj);
270 printf("vm_page_buckets[%d] ((struct vm_page *)%p)"
271 " has no object\n", i, mptr);
283 * A page with an object.
286 checkpage(kvm_t *kd, vm_page_t mptr, vm_page_t m, struct vm_object *obj)
293 hv = ((uintptr_t)m->object + m->pindex) ^ obj->hash_rand;
294 hv &= vm_page_hash_mask;
295 kkread(kd, (u_long)&vm_page_buckets[hv], &scanptr, sizeof(scanptr));
299 kkread(kd, (u_long)scanptr, &scan, sizeof(scan));
300 scanptr = scan.hnext;
304 printf("good checkpage %p bucket %d\n", mptr, hv);
306 printf("vm_page_buckets[%d] ((struct vm_page *)%p)"
307 " page not found in bucket list\n", hv, mptr);
313 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
315 if (kvm_read(kd, addr, buf, nbytes) != nbytes) {