| 1 | /* $NetBSD: db_xxx.c,v 1.71 2015/02/27 00:47:30 ozaki-r 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 1.71 2015/02/27 00:47:30 ozaki-r 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 *vp; |
| 161 | bool full = false; |
| 162 | fdtab_t *dt; |
| 163 | |
| 164 | if (!haddr) { |
| 165 | db_printf("usage: show files address\n" ); |
| 166 | db_printf("\taddress == an address of a proc structure\n" ); |
| 167 | return; |
| 168 | } |
| 169 | |
| 170 | if (modif[0] == 'f') |
| 171 | full = true; |
| 172 | |
| 173 | p = (struct proc *) (uintptr_t) addr; |
| 174 | |
| 175 | fdp = p->p_fd; |
| 176 | dt = fdp->fd_dt; |
| 177 | for (i = 0; i < dt->dt_nfiles; i++) { |
| 178 | if ((ff = dt->dt_ff[i]) == NULL) |
| 179 | continue; |
| 180 | |
| 181 | fp = ff->ff_file; |
| 182 | |
| 183 | /* Only look at vnodes... */ |
| 184 | if (fp != NULL && fp->f_type == DTYPE_VNODE |
| 185 | && fp->f_vnode != NULL) { |
| 186 | vp = fp->f_vnode; |
| 187 | vfs_vnode_print(vp, full, db_printf); |
| 188 | |
| 189 | #ifdef LOCKDEBUG |
| 190 | db_printf("\nv_uobj.vmobjlock lock details:\n" ); |
| 191 | lockdebug_lock_print(vp->v_uobj.vmobjlock, db_printf); |
| 192 | db_printf("\n" ); |
| 193 | #endif |
| 194 | } |
| 195 | } |
| 196 | #endif |
| 197 | } |
| 198 | |
| 199 | #ifdef AIO |
| 200 | void |
| 201 | db_show_aio_jobs(db_expr_t addr, bool haddr, |
| 202 | db_expr_t count, const char *modif) |
| 203 | { |
| 204 | |
| 205 | aio_print_jobs(db_printf); |
| 206 | } |
| 207 | #endif |
| 208 | |
| 209 | #ifdef MQUEUE |
| 210 | void |
| 211 | db_show_mqueue_cmd(db_expr_t addr, bool haddr, |
| 212 | db_expr_t count, const char *modif) |
| 213 | { |
| 214 | |
| 215 | #ifdef _KERNEL /* XXX CRASH(8) */ |
| 216 | mqueue_print_list(db_printf); |
| 217 | #endif |
| 218 | } |
| 219 | #endif |
| 220 | |
| 221 | void |
| 222 | db_show_module_cmd(db_expr_t addr, bool haddr, |
| 223 | db_expr_t count, const char *modif) |
| 224 | { |
| 225 | |
| 226 | #ifdef _KERNEL /* XXX CRASH(8) */ |
| 227 | module_print_list(db_printf); |
| 228 | #endif |
| 229 | } |
| 230 | |
| 231 | void |
| 232 | db_show_all_pools(db_expr_t addr, bool haddr, |
| 233 | db_expr_t count, const char *modif) |
| 234 | { |
| 235 | |
| 236 | #ifdef _KERNEL /* XXX CRASH(8) */ |
| 237 | pool_printall(modif, db_printf); |
| 238 | #endif |
| 239 | } |
| 240 | |
| 241 | void |
| 242 | db_show_all_vmems(db_expr_t addr, bool have_addr, |
| 243 | db_expr_t count, const char *modif) |
| 244 | { |
| 245 | |
| 246 | #ifdef _KERNEL /* XXX CRASH(8) */ |
| 247 | vmem_printall(modif, db_printf); |
| 248 | #endif |
| 249 | } |
| 250 | |
| 251 | void |
| 252 | db_dmesg(db_expr_t addr, bool haddr, db_expr_t count, const char *modif) |
| 253 | { |
| 254 | struct kern_msgbuf mb, *mbp; |
| 255 | db_expr_t print; |
| 256 | int newl, skip, i; |
| 257 | char *p, *bufdata, ch; |
| 258 | |
| 259 | if (!db_read_int("msgbufenabled" )) { |
| 260 | db_printf("message buffer not available\n" ); |
| 261 | return; |
| 262 | } |
| 263 | mbp = (struct kern_msgbuf *)db_read_ptr("msgbufp" ); |
| 264 | db_read_bytes((db_addr_t)mbp, sizeof(mb), (char *)&mb); |
| 265 | if (mb.msg_magic != MSG_MAGIC) { |
| 266 | db_printf("message buffer not available\n" ); |
| 267 | return; |
| 268 | } |
| 269 | |
| 270 | bufdata = &mbp->msg_bufc[0]; |
| 271 | |
| 272 | if (haddr && addr < mb.msg_bufs) |
| 273 | print = addr; |
| 274 | else |
| 275 | print = mb.msg_bufs; |
| 276 | |
| 277 | for (newl = skip = i = 0, p = bufdata + mb.msg_bufx; |
| 278 | i < mb.msg_bufs; i++, p++) { |
| 279 | if (p == bufdata + mb.msg_bufs) |
| 280 | p = bufdata; |
| 281 | if (i < mb.msg_bufs - print) { |
| 282 | continue; |
| 283 | } |
| 284 | db_read_bytes((db_addr_t)p, sizeof(ch), &ch); |
| 285 | /* Skip "\n<.*>" syslog sequences. */ |
| 286 | if (skip) { |
| 287 | if (ch == '>') |
| 288 | newl = skip = 0; |
| 289 | continue; |
| 290 | } |
| 291 | if (newl && ch == '<') { |
| 292 | skip = 1; |
| 293 | continue; |
| 294 | } |
| 295 | if (ch == '\0') |
| 296 | continue; |
| 297 | newl = ch == '\n'; |
| 298 | db_printf("%c" , ch); |
| 299 | } |
| 300 | if (!newl) |
| 301 | db_printf("\n" ); |
| 302 | } |
| 303 | |
| 304 | void |
| 305 | db_show_sched_qs(db_expr_t addr, bool haddr, |
| 306 | db_expr_t count, const char *modif) |
| 307 | { |
| 308 | |
| 309 | #ifdef _KERNEL /* XXX CRASH(8) */ |
| 310 | sched_print_runqueue(db_printf); |
| 311 | #endif |
| 312 | } |
| 313 | |
| 314 | void |
| 315 | db_show_panic(db_expr_t addr, bool haddr, db_expr_t count, const char *modif) |
| 316 | { |
| 317 | #ifdef _KERNEL /* XXX CRASH(8) */ |
| 318 | int s; |
| 319 | |
| 320 | s = splhigh(); |
| 321 | |
| 322 | db_printf("Panic string: %s\n" , panicstr); |
| 323 | |
| 324 | (void)splx(s); |
| 325 | #endif |
| 326 | } |
| 327 | |