Fri Dec 2 23:57:59 2011 UTC ()
deal with the proc_lock mutex.


(christos)
diff -r1.64 -r1.65 src/sys/ddb/db_xxx.c

cvs diff -r1.64 -r1.65 src/sys/ddb/db_xxx.c (switch to unified diff)

--- src/sys/ddb/db_xxx.c 2011/06/12 03:35:51 1.64
+++ src/sys/ddb/db_xxx.c 2011/12/02 23:57:58 1.65
@@ -1,295 +1,298 @@ @@ -1,295 +1,298 @@
1/* $NetBSD: db_xxx.c,v 1.64 2011/06/12 03:35:51 rmind Exp $ */ 1/* $NetBSD: db_xxx.c,v 1.65 2011/12/02 23:57:58 christos Exp $ */
2 2
3/* 3/*
4 * Copyright (c) 1982, 1986, 1989, 1991, 1993 4 * Copyright (c) 1982, 1986, 1989, 1991, 1993
5 * The Regents of the University of California. All rights reserved. 5 * The Regents of the University of California. All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions 8 * modification, are permitted provided that the following conditions
9 * are met: 9 * are met:
10 * 1. Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer. 11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright 12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the 13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution. 14 * documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors 15 * 3. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software 16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission. 17 * without specific prior written permission.
18 * 18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE. 29 * SUCH DAMAGE.
30 * 30 *
31 * from: kern_proc.c 8.4 (Berkeley) 1/4/94 31 * from: kern_proc.c 8.4 (Berkeley) 1/4/94
32 */ 32 */
33 33
34/* 34/*
35 * Miscellaneous DDB functions that are intimate (xxx) with various 35 * Miscellaneous DDB functions that are intimate (xxx) with various
36 * data structures and functions used by the kernel (proc, callout). 36 * data structures and functions used by the kernel (proc, callout).
37 */ 37 */
38 38
39#include <sys/cdefs.h> 39#include <sys/cdefs.h>
40__KERNEL_RCSID(0, "$NetBSD: db_xxx.c,v 1.64 2011/06/12 03:35:51 rmind Exp $"); 40__KERNEL_RCSID(0, "$NetBSD: db_xxx.c,v 1.65 2011/12/02 23:57:58 christos Exp $");
41 41
42#ifdef _KERNEL_OPT 42#ifdef _KERNEL_OPT
43#include "opt_kgdb.h" 43#include "opt_kgdb.h"
44#include "opt_aio.h" 44#include "opt_aio.h"
45#include "opt_mqueue.h" 45#include "opt_mqueue.h"
46#endif 46#endif
47 47
48#ifndef _KERNEL 48#ifndef _KERNEL
49#include <stdbool.h> 49#include <stdbool.h>
50#endif 50#endif
51 51
52#include <sys/param.h> 52#include <sys/param.h>
53#include <sys/systm.h> 53#include <sys/systm.h>
54#include <sys/kernel.h> 54#include <sys/kernel.h>
55#include <sys/proc.h> 55#include <sys/proc.h>
56#include <sys/msgbuf.h> 56#include <sys/msgbuf.h>
57#include <sys/callout.h> 57#include <sys/callout.h>
58#include <sys/file.h> 58#include <sys/file.h>
59#include <sys/filedesc.h> 59#include <sys/filedesc.h>
60#include <sys/lockdebug.h> 60#include <sys/lockdebug.h>
61#include <sys/signalvar.h> 61#include <sys/signalvar.h>
62#include <sys/resourcevar.h> 62#include <sys/resourcevar.h>
63#include <sys/pool.h> 63#include <sys/pool.h>
64#include <sys/uio.h> 64#include <sys/uio.h>
65#include <sys/kauth.h> 65#include <sys/kauth.h>
66#include <sys/mqueue.h> 66#include <sys/mqueue.h>
67#include <sys/vnode.h> 67#include <sys/vnode.h>
68#include <sys/module.h> 68#include <sys/module.h>
69#include <sys/cpu.h> 69#include <sys/cpu.h>
70#include <sys/vmem.h> 70#include <sys/vmem.h>
71 71
72#include <ddb/ddb.h> 72#include <ddb/ddb.h>
73#include <ddb/db_user.h> 73#include <ddb/db_user.h>
74 74
75#ifdef KGDB 75#ifdef KGDB
76#include <sys/kgdb.h> 76#include <sys/kgdb.h>
77#endif 77#endif
78 78
79void 79void
80db_kill_proc(db_expr_t addr, bool haddr, 80db_kill_proc(db_expr_t addr, bool haddr,
81 db_expr_t count, const char *modif) 81 db_expr_t count, const char *modif)
82{ 82{
83#ifdef _KERNEL /* XXX CRASH(8) */ 83#ifdef _KERNEL /* XXX CRASH(8) */
84 struct proc *p; 84 struct proc *p;
85 ksiginfo_t ksi; 85 ksiginfo_t ksi;
86 db_expr_t pid, sig; 86 db_expr_t pid, sig;
87 int t; 87 int t;
88 88
89 /* What pid? */ 89 /* What pid? */
90 if (!db_expression(&pid)) { 90 if (!db_expression(&pid)) {
91 db_error("pid?\n"); 91 db_error("pid?\n");
92 /*NOTREACHED*/ 92 /*NOTREACHED*/
93 } 93 }
94 /* What sig? */ 94 /* What sig? */
95 t = db_read_token(); 95 t = db_read_token();
96 if (t == tCOMMA) { 96 if (t == tCOMMA) {
97 if (!db_expression(&sig)) { 97 if (!db_expression(&sig)) {
98 db_error("sig?\n"); 98 db_error("sig?\n");
99 /*NOTREACHED*/ 99 /*NOTREACHED*/
100 } 100 }
101 } else { 101 } else {
102 db_unread_token(t); 102 db_unread_token(t);
103 sig = 15; 103 sig = 15;
104 } 104 }
105 if (db_read_token() != tEOL) { 105 if (db_read_token() != tEOL) {
106 db_error("?\n"); 106 db_error("?\n");
107 /*NOTREACHED*/ 107 /*NOTREACHED*/
108 } 108 }
109 109 /* We might stop when the mutex is held or when not */
 110 t = mutex_tryenter(proc_lock);
110 p = proc_find((pid_t)pid); 111 p = proc_find((pid_t)pid);
 112 if (t)
 113 mutex_exit(proc_lock);
111 if (p == NULL) { 114 if (p == NULL) {
112 db_error("no such proc\n"); 115 db_error("no such proc\n");
113 /*NOTREACHED*/ 116 /*NOTREACHED*/
114 } 117 }
115 KSI_INIT(&ksi); 118 KSI_INIT(&ksi);
116 ksi.ksi_signo = sig; 119 ksi.ksi_signo = sig;
117 ksi.ksi_code = SI_USER; 120 ksi.ksi_code = SI_USER;
118 ksi.ksi_pid = 0; 121 ksi.ksi_pid = 0;
119 ksi.ksi_uid = 0; 122 ksi.ksi_uid = 0;
120 kpsignal2(p, &ksi); 123 kpsignal2(p, &ksi);
121#else 124#else
122 db_printf("This command is not currently supported.\n"); 125 db_printf("This command is not currently supported.\n");
123#endif 126#endif
124} 127}
125 128
126#ifdef KGDB 129#ifdef KGDB
127void 130void
128db_kgdb_cmd(db_expr_t addr, bool haddr, 131db_kgdb_cmd(db_expr_t addr, bool haddr,
129 db_expr_t count, const char *modif) 132 db_expr_t count, const char *modif)
130{ 133{
131 kgdb_active++; 134 kgdb_active++;
132 kgdb_trap(db_trap_type, DDB_REGS); 135 kgdb_trap(db_trap_type, DDB_REGS);
133 kgdb_active--; 136 kgdb_active--;
134} 137}
135#endif 138#endif
136 139
137void 140void
138db_show_files_cmd(db_expr_t addr, bool haddr, 141db_show_files_cmd(db_expr_t addr, bool haddr,
139 db_expr_t count, const char *modif) 142 db_expr_t count, const char *modif)
140{ 143{
141#ifdef _KERNEL /* XXX CRASH(8) */ 144#ifdef _KERNEL /* XXX CRASH(8) */
142 struct proc *p; 145 struct proc *p;
143 int i; 146 int i;
144 filedesc_t *fdp; 147 filedesc_t *fdp;
145 fdfile_t *ff; 148 fdfile_t *ff;
146 file_t *fp; 149 file_t *fp;
147 struct vnode *vn; 150 struct vnode *vn;
148 bool full = false; 151 bool full = false;
149 fdtab_t *dt; 152 fdtab_t *dt;
150 153
151 if (modif[0] == 'f') 154 if (modif[0] == 'f')
152 full = true; 155 full = true;
153 156
154 p = (struct proc *) (uintptr_t) addr; 157 p = (struct proc *) (uintptr_t) addr;
155 158
156 fdp = p->p_fd; 159 fdp = p->p_fd;
157 dt = fdp->fd_dt; 160 dt = fdp->fd_dt;
158 for (i = 0; i < dt->dt_nfiles; i++) { 161 for (i = 0; i < dt->dt_nfiles; i++) {
159 if ((ff = dt->dt_ff[i]) == NULL) 162 if ((ff = dt->dt_ff[i]) == NULL)
160 continue; 163 continue;
161 164
162 fp = ff->ff_file; 165 fp = ff->ff_file;
163 166
164 /* Only look at vnodes... */ 167 /* Only look at vnodes... */
165 if ((fp != NULL) && (fp->f_type == DTYPE_VNODE)) { 168 if ((fp != NULL) && (fp->f_type == DTYPE_VNODE)) {
166 if (fp->f_data != NULL) { 169 if (fp->f_data != NULL) {
167 vn = (struct vnode *) fp->f_data; 170 vn = (struct vnode *) fp->f_data;
168 vfs_vnode_print(vn, full, db_printf); 171 vfs_vnode_print(vn, full, db_printf);
169 172
170#ifdef LOCKDEBUG 173#ifdef LOCKDEBUG
171 db_printf("\nv_uobj.vmobjlock lock details:\n"); 174 db_printf("\nv_uobj.vmobjlock lock details:\n");
172 lockdebug_lock_print(vn->v_uobj.vmobjlock, 175 lockdebug_lock_print(vn->v_uobj.vmobjlock,
173 db_printf); 176 db_printf);
174 db_printf("\n"); 177 db_printf("\n");
175#endif 178#endif
176 } 179 }
177 } 180 }
178 } 181 }
179#endif 182#endif
180} 183}
181 184
182#ifdef AIO 185#ifdef AIO
183void 186void
184db_show_aio_jobs(db_expr_t addr, bool haddr, 187db_show_aio_jobs(db_expr_t addr, bool haddr,
185 db_expr_t count, const char *modif) 188 db_expr_t count, const char *modif)
186{ 189{
187 190
188 aio_print_jobs(db_printf); 191 aio_print_jobs(db_printf);
189} 192}
190#endif 193#endif
191 194
192#ifdef MQUEUE 195#ifdef MQUEUE
193void 196void
194db_show_mqueue_cmd(db_expr_t addr, bool haddr, 197db_show_mqueue_cmd(db_expr_t addr, bool haddr,
195 db_expr_t count, const char *modif) 198 db_expr_t count, const char *modif)
196{ 199{
197 200
198#ifdef _KERNEL /* XXX CRASH(8) */ 201#ifdef _KERNEL /* XXX CRASH(8) */
199 mqueue_print_list(db_printf); 202 mqueue_print_list(db_printf);
200#endif 203#endif
201} 204}
202#endif 205#endif
203 206
204void 207void
205db_show_module_cmd(db_expr_t addr, bool haddr, 208db_show_module_cmd(db_expr_t addr, bool haddr,
206 db_expr_t count, const char *modif) 209 db_expr_t count, const char *modif)
207{ 210{
208 211
209#ifdef _KERNEL /* XXX CRASH(8) */ 212#ifdef _KERNEL /* XXX CRASH(8) */
210 module_print_list(db_printf); 213 module_print_list(db_printf);
211#endif 214#endif
212} 215}
213 216
214void 217void
215db_show_all_pools(db_expr_t addr, bool haddr, 218db_show_all_pools(db_expr_t addr, bool haddr,
216 db_expr_t count, const char *modif) 219 db_expr_t count, const char *modif)
217{ 220{
218 221
219#ifdef _KERNEL /* XXX CRASH(8) */ 222#ifdef _KERNEL /* XXX CRASH(8) */
220 pool_printall(modif, db_printf); 223 pool_printall(modif, db_printf);
221#endif 224#endif
222} 225}
223 226
224void 227void
225db_show_all_vmems(db_expr_t addr, bool have_addr, 228db_show_all_vmems(db_expr_t addr, bool have_addr,
226 db_expr_t count, const char *modif) 229 db_expr_t count, const char *modif)
227{ 230{
228 231
229#ifdef _KERNEL /* XXX CRASH(8) */ 232#ifdef _KERNEL /* XXX CRASH(8) */
230 vmem_printall(modif, db_printf); 233 vmem_printall(modif, db_printf);
231#endif 234#endif
232} 235}
233 236
234void 237void
235db_dmesg(db_expr_t addr, bool haddr, db_expr_t count, const char *modif) 238db_dmesg(db_expr_t addr, bool haddr, db_expr_t count, const char *modif)
236{ 239{
237 struct kern_msgbuf mb, *mbp; 240 struct kern_msgbuf mb, *mbp;
238 db_expr_t print; 241 db_expr_t print;
239 int newl, skip, i; 242 int newl, skip, i;
240 char *p, *bufdata, ch; 243 char *p, *bufdata, ch;
241 244
242 if (!db_read_int("msgbufenabled")) { 245 if (!db_read_int("msgbufenabled")) {
243 db_printf("message buffer not available\n"); 246 db_printf("message buffer not available\n");
244 return; 247 return;
245 } 248 }
246 mbp = (struct kern_msgbuf *)db_read_ptr("msgbufp"); 249 mbp = (struct kern_msgbuf *)db_read_ptr("msgbufp");
247 db_read_bytes((db_addr_t)mbp, sizeof(mb), (char *)&mb); 250 db_read_bytes((db_addr_t)mbp, sizeof(mb), (char *)&mb);
248 if (mb.msg_magic != MSG_MAGIC) { 251 if (mb.msg_magic != MSG_MAGIC) {
249 db_printf("message buffer not available\n"); 252 db_printf("message buffer not available\n");
250 return; 253 return;
251 } 254 }
252 255
253 bufdata = &mbp->msg_bufc[0]; 256 bufdata = &mbp->msg_bufc[0];
254 257
255 if (haddr && addr < mb.msg_bufs) 258 if (haddr && addr < mb.msg_bufs)
256 print = addr; 259 print = addr;
257 else 260 else
258 print = mb.msg_bufs; 261 print = mb.msg_bufs;
259 262
260 for (newl = skip = i = 0, p = bufdata + mb.msg_bufx; 263 for (newl = skip = i = 0, p = bufdata + mb.msg_bufx;
261 i < mb.msg_bufs; i++, p++) { 264 i < mb.msg_bufs; i++, p++) {
262 if (p == bufdata + mb.msg_bufs) 265 if (p == bufdata + mb.msg_bufs)
263 p = bufdata; 266 p = bufdata;
264 if (i < mb.msg_bufs - print) { 267 if (i < mb.msg_bufs - print) {
265 continue; 268 continue;
266 } 269 }
267 db_read_bytes((db_addr_t)p, sizeof(ch), &ch); 270 db_read_bytes((db_addr_t)p, sizeof(ch), &ch);
268 /* Skip "\n<.*>" syslog sequences. */ 271 /* Skip "\n<.*>" syslog sequences. */
269 if (skip) { 272 if (skip) {
270 if (ch == '>') 273 if (ch == '>')
271 newl = skip = 0; 274 newl = skip = 0;
272 continue; 275 continue;
273 } 276 }
274 if (newl && ch == '<') { 277 if (newl && ch == '<') {
275 skip = 1; 278 skip = 1;
276 continue; 279 continue;
277 } 280 }
278 if (ch == '\0') 281 if (ch == '\0')
279 continue; 282 continue;
280 newl = ch == '\n'; 283 newl = ch == '\n';
281 db_printf("%c", ch); 284 db_printf("%c", ch);
282 } 285 }
283 if (!newl) 286 if (!newl)
284 db_printf("\n"); 287 db_printf("\n");
285} 288}
286 289
287void 290void
288db_show_sched_qs(db_expr_t addr, bool haddr, 291db_show_sched_qs(db_expr_t addr, bool haddr,
289 db_expr_t count, const char *modif) 292 db_expr_t count, const char *modif)
290{ 293{
291 294
292#ifdef _KERNEL /* XXX CRASH(8) */ 295#ifdef _KERNEL /* XXX CRASH(8) */
293 sched_print_runqueue(db_printf); 296 sched_print_runqueue(db_printf);
294#endif 297#endif
295} 298}