db_xxx.c revision 1.67
1 /* $NetBSD: db_xxx.c,v 1.67 2013/01/05 15:23:27 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1989, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 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 17 * without specific prior written permission. 18 * 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 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 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 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 29 * SUCH DAMAGE. 30 * 31 * from: kern_proc.c 8.4 (Berkeley) 1/4/94 32 */ 33 34 /* 35 * Miscellaneous DDB functions that are intimate (xxx) with various 36 * data structures and functions used by the kernel (proc, callout). 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: db_xxx.c,v 1.67 2013/01/05 15:23:27 christos Exp $"); 41 42 #ifdef _KERNEL_OPT 43 #include "opt_kgdb.h" 44 #include "opt_aio.h" 45 #include "opt_mqueue.h" 46 #endif 47 48 #ifndef _KERNEL 49 #include <stdbool.h> 50 #endif 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/kernel.h> 55 #include <sys/proc.h> 56 #include <sys/msgbuf.h> 57 #include <sys/callout.h> 58 #include <sys/file.h> 59 #include <sys/filedesc.h> 60 #include <sys/lockdebug.h> 61 #include <sys/signalvar.h> 62 #include <sys/resourcevar.h> 63 #include <sys/pool.h> 64 #include <sys/uio.h> 65 #include <sys/kauth.h> 66 #include <sys/mqueue.h> 67 #include <sys/vnode.h> 68 #include <sys/module.h> 69 #include <sys/cpu.h> 70 #include <sys/vmem.h> 71 72 #include <ddb/ddb.h> 73 #include <ddb/db_user.h> 74 75 #ifdef KGDB 76 #include <sys/kgdb.h> 77 #endif 78 79 void 80 db_kill_proc(db_expr_t addr, bool haddr, 81 db_expr_t count, const char *modif) 82 { 83 #ifdef _KERNEL /* XXX CRASH(8) */ 84 struct proc *p; 85 ksiginfo_t ksi; 86 db_expr_t pid, sig; 87 int t; 88 89 /* What pid? */ 90 if (!db_expression(&pid)) { 91 db_error("pid?\n"); 92 /*NOTREACHED*/ 93 } 94 /* What sig? */ 95 t = db_read_token(); 96 if (t == tCOMMA) { 97 if (!db_expression(&sig)) { 98 db_error("sig?\n"); 99 /*NOTREACHED*/ 100 } 101 } else { 102 db_unread_token(t); 103 sig = 15; 104 } 105 if (db_read_token() != tEOL) { 106 db_error("?\n"); 107 /*NOTREACHED*/ 108 } 109 /* We might stop when the mutex is held or when not */ 110 t = mutex_tryenter(proc_lock); 111 #ifdef DIAGNOSTIC 112 if (!t) { 113 db_error("could not acquire proc_lock mutex\n"); 114 /*NOTREACHED*/ 115 } 116 #endif 117 p = proc_find((pid_t)pid); 118 if (p == NULL) { 119 if (t) 120 mutex_exit(proc_lock); 121 db_error("no such proc\n"); 122 /*NOTREACHED*/ 123 } 124 KSI_INIT(&ksi); 125 ksi.ksi_signo = sig; 126 ksi.ksi_code = SI_USER; 127 ksi.ksi_pid = 0; 128 ksi.ksi_uid = 0; 129 mutex_enter(p->p_lock); 130 kpsignal2(p, &ksi); 131 mutex_exit(p->p_lock); 132 if (t) 133 mutex_exit(proc_lock); 134 #else 135 db_printf("This command is not currently supported.\n"); 136 #endif 137 } 138 139 #ifdef KGDB 140 void 141 db_kgdb_cmd(db_expr_t addr, bool haddr, 142 db_expr_t count, const char *modif) 143 { 144 kgdb_active++; 145 kgdb_trap(db_trap_type, DDB_REGS); 146 kgdb_active--; 147 } 148 #endif 149 150 void 151 db_show_files_cmd(db_expr_t addr, bool haddr, 152 db_expr_t count, const char *modif) 153 { 154 #ifdef _KERNEL /* XXX CRASH(8) */ 155 struct proc *p; 156 int i; 157 filedesc_t *fdp; 158 fdfile_t *ff; 159 file_t *fp; 160 struct vnode *vn; 161 bool full = false; 162 fdtab_t *dt; 163 164 if (modif[0] == 'f') 165 full = true; 166 167 p = (struct proc *) (uintptr_t) addr; 168 169 fdp = p->p_fd; 170 dt = fdp->fd_dt; 171 for (i = 0; i < dt->dt_nfiles; i++) { 172 if ((ff = dt->dt_ff[i]) == NULL) 173 continue; 174 175 fp = ff->ff_file; 176 177 /* Only look at vnodes... */ 178 if ((fp != NULL) && (fp->f_type == DTYPE_VNODE)) { 179 if (fp->f_data != NULL) { 180 vn = (struct vnode *) fp->f_data; 181 vfs_vnode_print(vn, full, db_printf); 182 183 #ifdef LOCKDEBUG 184 db_printf("\nv_uobj.vmobjlock lock details:\n"); 185 lockdebug_lock_print(vn->v_uobj.vmobjlock, 186 db_printf); 187 db_printf("\n"); 188 #endif 189 } 190 } 191 } 192 #endif 193 } 194 195 #ifdef AIO 196 void 197 db_show_aio_jobs(db_expr_t addr, bool haddr, 198 db_expr_t count, const char *modif) 199 { 200 201 aio_print_jobs(db_printf); 202 } 203 #endif 204 205 #ifdef MQUEUE 206 void 207 db_show_mqueue_cmd(db_expr_t addr, bool haddr, 208 db_expr_t count, const char *modif) 209 { 210 211 #ifdef _KERNEL /* XXX CRASH(8) */ 212 mqueue_print_list(db_printf); 213 #endif 214 } 215 #endif 216 217 void 218 db_show_module_cmd(db_expr_t addr, bool haddr, 219 db_expr_t count, const char *modif) 220 { 221 222 #ifdef _KERNEL /* XXX CRASH(8) */ 223 module_print_list(db_printf); 224 #endif 225 } 226 227 void 228 db_show_all_pools(db_expr_t addr, bool haddr, 229 db_expr_t count, const char *modif) 230 { 231 232 #ifdef _KERNEL /* XXX CRASH(8) */ 233 pool_printall(modif, db_printf); 234 #endif 235 } 236 237 void 238 db_show_all_vmems(db_expr_t addr, bool have_addr, 239 db_expr_t count, const char *modif) 240 { 241 242 #ifdef _KERNEL /* XXX CRASH(8) */ 243 vmem_printall(modif, db_printf); 244 #endif 245 } 246 247 void 248 db_dmesg(db_expr_t addr, bool haddr, db_expr_t count, const char *modif) 249 { 250 struct kern_msgbuf mb, *mbp; 251 db_expr_t print; 252 int newl, skip, i; 253 char *p, *bufdata, ch; 254 255 if (!db_read_int("msgbufenabled")) { 256 db_printf("message buffer not available\n"); 257 return; 258 } 259 mbp = (struct kern_msgbuf *)db_read_ptr("msgbufp"); 260 db_read_bytes((db_addr_t)mbp, sizeof(mb), (char *)&mb); 261 if (mb.msg_magic != MSG_MAGIC) { 262 db_printf("message buffer not available\n"); 263 return; 264 } 265 266 bufdata = &mbp->msg_bufc[0]; 267 268 if (haddr && addr < mb.msg_bufs) 269 print = addr; 270 else 271 print = mb.msg_bufs; 272 273 for (newl = skip = i = 0, p = bufdata + mb.msg_bufx; 274 i < mb.msg_bufs; i++, p++) { 275 if (p == bufdata + mb.msg_bufs) 276 p = bufdata; 277 if (i < mb.msg_bufs - print) { 278 continue; 279 } 280 db_read_bytes((db_addr_t)p, sizeof(ch), &ch); 281 /* Skip "\n<.*>" syslog sequences. */ 282 if (skip) { 283 if (ch == '>') 284 newl = skip = 0; 285 continue; 286 } 287 if (newl && ch == '<') { 288 skip = 1; 289 continue; 290 } 291 if (ch == '\0') 292 continue; 293 newl = ch == '\n'; 294 db_printf("%c", ch); 295 } 296 if (!newl) 297 db_printf("\n"); 298 } 299 300 void 301 db_show_sched_qs(db_expr_t addr, bool haddr, 302 db_expr_t count, const char *modif) 303 { 304 305 #ifdef _KERNEL /* XXX CRASH(8) */ 306 sched_print_runqueue(db_printf); 307 #endif 308 } 309 310 void 311 db_show_panic(db_expr_t addr, bool haddr, db_expr_t count, const char *modif) 312 { 313 #ifdef _KERNEL /* XXX CRASH(8) */ 314 int s; 315 316 s = splhigh(); 317 318 db_printf("Panic string: %s\n", panicstr); 319 320 (void)splx(s); 321 #endif 322 } 323
Indexes created Wed Oct 01 13:09:50 GMT 2025