db_xxx.c

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    1 /*      $NetBSD: db_xxx.c,v 1.52.4.1 2009/02/24 04:05:07 snj 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 1.52.4.1 2009/02/24 04:05:07 snj Exp $");
   41 
   42 #include "opt_kgdb.h"
   43 
   44 #include <sys/param.h>
   45 #include <sys/systm.h>
   46 #include <sys/kernel.h>
   47 #include <sys/proc.h>
   48 #include <sys/msgbuf.h>
   49 #include <sys/callout.h>
   50 #include <sys/file.h>
   51 #include <sys/filedesc.h>
   52 #include <sys/lockdebug.h>
   53 #include <sys/signalvar.h>
   54 #include <sys/resourcevar.h>
   55 #include <sys/pool.h>
   56 #include <sys/kauth.h>
   57 #include <sys/mqueue.h>
   58 #include <sys/vnode.h>
   59 #include <sys/cpu.h>
   60 
   61 #include <machine/db_machdep.h>
   62 
   63 #include <ddb/db_access.h>
   64 #include <ddb/db_command.h>
   65 #include <ddb/db_interface.h>
   66 #include <ddb/db_lex.h>
   67 #include <ddb/db_output.h>
   68 #include <ddb/db_sym.h>
   69 #include <ddb/db_extern.h>
   70 #ifdef KGDB
   71 #include <sys/kgdb.h>
   72 #endif
   73 
   74 void
   75 db_kill_proc(db_expr_t addr, bool haddr,
   76     db_expr_t count, const char *modif)
   77 {
   78         struct proc *p;
   79         db_expr_t pid, sig;
   80         int t;
   81 
   82         /* What pid? */
   83         if (!db_expression(&pid)) {
   84                 db_error("pid?\n");
   85                 /*NOTREACHED*/
   86         }
   87         /* What sig? */
   88         t = db_read_token();
   89         if (t == tCOMMA) {
   90                 if (!db_expression(&sig)) {
   91                         db_error("sig?\n");
   92                         /*NOTREACHED*/
   93                 }
   94         } else {
   95                 db_unread_token(t);
   96                 sig = 15;
   97         }
   98         if (db_read_token() != tEOL) {
   99                 db_error("?\n");
  100                 /*NOTREACHED*/
  101         }
  102 
  103         p = pfind((pid_t)pid);
  104         if (p == NULL) {
  105                 db_error("no such proc\n");
  106                 /*NOTREACHED*/
  107         }
  108         psignal(p, (int)sig);
  109 }
  110 
  111 #ifdef KGDB
  112 void
  113 db_kgdb_cmd(db_expr_t addr, bool haddr,
  114     db_expr_t count, const char *modif)
  115 {
  116         kgdb_active++;
  117         kgdb_trap(db_trap_type, DDB_REGS);
  118         kgdb_active--;
  119 }
  120 #endif
  121 
  122 void
  123 db_show_files_cmd(db_expr_t addr, bool haddr,
  124               db_expr_t count, const char *modif)
  125 {
  126         struct proc *p;
  127         int i;
  128         filedesc_t *fdp;
  129         fdfile_t *ff;
  130         file_t *fp;
  131         struct vnode *vn;
  132         bool full = false;
  133 
  134         if (modif[0] == 'f')
  135                 full = true;
  136 
  137         p = (struct proc *) (uintptr_t) addr;
  138 
  139         fdp = p->p_fd;
  140         for (i = 0; i < fdp->fd_nfiles; i++) {
  141                 if ((ff = fdp->fd_ofiles[i]) == NULL)
  142                         continue;
  143 
  144                 fp = ff->ff_file;
  145 
  146                 /* Only look at vnodes... */
  147                 if ((fp != NULL) && (fp->f_type == DTYPE_VNODE)) {
  148                         if (fp->f_data != NULL) {
  149                                 vn = (struct vnode *) fp->f_data;
  150                                 vfs_vnode_print(vn, full, db_printf);
  151 
  152 #ifdef LOCKDEBUG
  153                                 db_printf("\nv_uobj.vmobjlock lock details:\n");
  154                                 lockdebug_lock_print(&(vn->v_uobj.vmobjlock),
  155                                              db_printf);
  156                                 db_printf("\n");
  157 #endif
  158                         }
  159                 }
  160         }
  161 }
  162 
  163 void
  164 db_show_aio_jobs(db_expr_t addr, bool haddr,
  165     db_expr_t count, const char *modif)
  166 {
  167         aio_print_jobs(db_printf);
  168 }
  169 
  170 void
  171 db_show_mqueue_cmd(db_expr_t addr, bool haddr,
  172     db_expr_t count, const char *modif)
  173 {
  174         mqueue_print_list(db_printf);
  175 }
  176 
  177 void
  178 db_show_all_procs(db_expr_t addr, bool haddr,
  179     db_expr_t count, const char *modif)
  180 {
  181         const char *mode;
  182         struct proc *p, *pp;
  183         struct lwp *l, *cl;
  184         const struct proclist_desc *pd;
  185         char db_nbuf[MAXCOMLEN + 1];
  186         bool run;
  187         int cpuno;
  188 
  189         if (modif[0] == 0)
  190                 mode = "l";                     /* default == lwp mode */
  191         else
  192                 mode = strchr("mawln", modif[0]);
  193 
  194         if (mode == NULL || *mode == 'm') {
  195                 db_printf("usage: show all procs [/a] [/l] [/n] [/w]\n");
  196                 db_printf("\t/a == show process address info\n");
  197                 db_printf("\t/l == show LWP info\n");
  198                 db_printf("\t/n == show normal process info [default]\n");
  199                 db_printf("\t/w == show process wait/emul info\n");
  200                 return;
  201         }
  202 
  203         switch (*mode) {
  204         case 'a':
  205                 db_printf("PID  %10s %18s %18s %18s\n",
  206                     "COMMAND", "STRUCT PROC *", "UAREA *", "VMSPACE/VM_MAP");
  207                 break;
  208         case 'l':
  209                 db_printf("PID   %4s S %3s %9s %18s %18s %-8s\n",
  210                     "LID", "CPU", "FLAGS", "STRUCT LWP *", "NAME", "WAIT");
  211                 break;
  212         case 'n':
  213                 db_printf("PID  %8s %8s %10s S %7s %4s %16s %7s\n",
  214                     "PPID", "PGRP", "UID", "FLAGS", "LWPS", "COMMAND", "WAIT");
  215                 break;
  216         case 'w':
  217                 db_printf("PID  %4s %16s %8s %4s %-12s%s\n",
  218                     "LID", "COMMAND", "EMUL", "PRI", "WAIT-MSG",
  219                     "WAIT-CHANNEL");
  220                 break;
  221         }
  222 
  223         pd = proclists;
  224         cl = curlwp;
  225         for (pd = proclists; pd->pd_list != NULL; pd++) {
  226                 LIST_FOREACH(p, pd->pd_list, p_list) {
  227                         pp = p->p_pptr;
  228                         if (p->p_stat == 0) {
  229                                 continue;
  230                         }
  231                         l = LIST_FIRST(&p->p_lwps);
  232                         db_printf("%-5d", p->p_pid);
  233 
  234                         switch (*mode) {
  235 
  236                         case 'a':
  237                                 db_printf("%10.10s %18lx %18lx %18lx\n",
  238                                     p->p_comm, (long)p,
  239                                     (long)(l != NULL ? l->l_addr : 0),
  240                                     (long)p->p_vmspace);
  241                                 break;
  242                         case 'l':
  243                                  while (l != NULL) {
  244                                         if (l->l_name != NULL) {
  245                                                 snprintf(db_nbuf,
  246                                                          sizeof(db_nbuf),
  247                                                     "%s", l->l_name);
  248                                         } else
  249                                                 snprintf(db_nbuf,
  250                                                     sizeof(db_nbuf),
  251                                                     "%s", p->p_comm);
  252                                         run = (l->l_stat == LSONPROC ||
  253                                             (l->l_pflag & LP_RUNNING) != 0);
  254                                         if (l->l_cpu != NULL)
  255                                                 cpuno = cpu_index(l->l_cpu);
  256                                         else
  257                                                 cpuno = -1;
  258                                         db_printf("%c%4d %d %3d %9x %18lx %18s %-8s\n",
  259                                             (run ? '>' : ' '), l->l_lid,
  260                                             l->l_stat, cpuno, l->l_flag, (long)l,
  261                                             db_nbuf,
  262                                             (l->l_wchan && l->l_wmesg) ?
  263                                             l->l_wmesg : "");
  264 
  265                                         l = LIST_NEXT(l, l_sibling);
  266                                         if (l)
  267                                                 db_printf("%11s","");
  268                                 }
  269                                 break;
  270                         case 'n':
  271                                 db_printf("%8d %8d %10d %d %#7x %4d %16s %7.7s\n",
  272                                     pp ? pp->p_pid : -1, p->p_pgrp->pg_id,
  273                                     kauth_cred_getuid(p->p_cred), p->p_stat, p->p_flag,
  274                                     p->p_nlwps, p->p_comm,
  275                                     (p->p_nlwps != 1) ? "*" : (
  276                                     (l->l_wchan && l->l_wmesg) ?
  277                                     l->l_wmesg : ""));
  278                                 break;
  279 
  280                         case 'w':
  281                                  while (l != NULL) {
  282                                         db_printf(
  283                                             "%4d %16s %8s %4d %-12s %-18lx\n",
  284                                             l->l_lid, p->p_comm,
  285                                             p->p_emul->e_name, l->l_priority,
  286                                             (l->l_wchan && l->l_wmesg) ?
  287                                             l->l_wmesg : "", (long)l->l_wchan);
  288                                         l = LIST_NEXT(l, l_sibling);
  289                                         if (l)
  290                                                 db_printf("%11s","");
  291                                 }
  292                                 break;
  293                         }
  294                 }
  295         }
  296 }
  297 
  298 void
  299 db_show_all_pools(db_expr_t addr, bool haddr,
  300     db_expr_t count, const char *modif)
  301 {
  302 
  303         pool_printall(modif, db_printf);
  304 }
  305 
  306 void
  307 db_dmesg(db_expr_t addr, bool haddr, db_expr_t count,
  308     const char *modif)
  309 {
  310         struct kern_msgbuf *mbp;
  311         db_expr_t print;
  312         int ch, newl, skip, i;
  313         char *p, *bufdata;
  314 
  315         if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) {
  316                 db_printf("message buffer not available\n");
  317                 return;
  318         }
  319 
  320         mbp = msgbufp;
  321         bufdata = &mbp->msg_bufc[0];
  322 
  323         if (haddr && addr < mbp->msg_bufs)
  324                 print = addr;
  325         else
  326                 print = mbp->msg_bufs;
  327 
  328         for (newl = skip = i = 0, p = bufdata + mbp->msg_bufx;
  329             i < mbp->msg_bufs; i++, p++) {
  330                 if (p == bufdata + mbp->msg_bufs)
  331                         p = bufdata;
  332                 if (i < mbp->msg_bufs - print)
  333                         continue;
  334                 ch = *p;
  335                 /* Skip "\n<.*>" syslog sequences. */
  336                 if (skip) {
  337                         if (ch == '>')
  338                                 newl = skip = 0;
  339                         continue;
  340                 }
  341                 if (newl && ch == '<') {
  342                         skip = 1;
  343                         continue;
  344                 }
  345                 if (ch == '\0')
  346                         continue;
  347                 newl = ch == '\n';
  348                 db_printf("%c", ch);
  349         }
  350         if (!newl)
  351                 db_printf("\n");
  352 }
  353 
  354 void
  355 db_show_sched_qs(db_expr_t addr, bool haddr,
  356     db_expr_t count, const char *modif)
  357 {
  358 
  359         sched_print_runqueue(db_printf);
  360 }
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FreeBSD/Linux Kernel Cross Reference sys/ddb/db_xxx.c

FreeBSD/Linux Kernel Cross Reference
sys/ddb/db_xxx.c
