db_xxx.c

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    1 /*      $NetBSD: db_xxx.c,v 1.28 2003/09/20 03:02:04 thorpej 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 "opt_kgdb.h"
   40 
   41 #include <sys/cdefs.h>
   42 __KERNEL_RCSID(0, "$NetBSD: db_xxx.c,v 1.28 2003/09/20 03:02:04 thorpej Exp $");
   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 
   50 #include <sys/callout.h>
   51 #include <sys/signalvar.h>
   52 #include <sys/resourcevar.h>
   53 
   54 #include <machine/db_machdep.h>
   55 
   56 #include <ddb/db_access.h>
   57 #include <ddb/db_command.h>
   58 #include <ddb/db_interface.h>
   59 #include <ddb/db_lex.h>
   60 #include <ddb/db_output.h>
   61 #include <ddb/db_sym.h>
   62 #include <ddb/db_extern.h>
   63 #ifdef KGDB
   64 #include <sys/kgdb.h>
   65 #endif
   66 
   67 void
   68 db_kill_proc(db_expr_t addr, int haddr, db_expr_t count, char *modif)
   69 {
   70         struct proc *p;
   71         db_expr_t pid, sig;
   72         int t;
   73 
   74         /* What pid? */
   75         if (!db_expression(&pid)) {
   76                 db_error("pid?\n");
   77                 /*NOTREACHED*/
   78         }
   79         /* What sig? */
   80         t = db_read_token();
   81         if (t == tCOMMA) {
   82                 if (!db_expression(&sig)) {
   83                         db_error("sig?\n");
   84                         /*NOTREACHED*/
   85                 }
   86         } else {
   87                 db_unread_token(t);
   88                 sig = 15;
   89         }
   90         if (db_read_token() != tEOL) {
   91                 db_error("?\n");
   92                 /*NOTREACHED*/
   93         }
   94 
   95         p = pfind((pid_t)pid);
   96         if (p == NULL) {
   97                 db_error("no such proc\n");
   98                 /*NOTREACHED*/
   99         }
  100         psignal(p, (int)sig);
  101 }
  102 
  103 #ifdef KGDB
  104 void
  105 db_kgdb_cmd(db_expr_t addr, int haddr, db_expr_t count, char *modif)
  106 {
  107         kgdb_active++;
  108         kgdb_trap(db_trap_type, DDB_REGS);
  109         kgdb_active--;
  110 }
  111 #endif
  112 
  113 void
  114 db_show_all_procs(db_expr_t addr, int haddr, db_expr_t count, char *modif)
  115 {
  116         int i;
  117 
  118         char *mode;
  119         struct proc *p, *pp, *cp;
  120         struct lwp *l, *cl;
  121         struct timeval tv[2];
  122         const struct proclist_desc *pd;
  123 
  124         if (modif[0] == 0)
  125                 modif[0] = 'n';                 /* default == normal mode */
  126 
  127         mode = strchr("mawln", modif[0]);
  128         if (mode == NULL || *mode == 'm') {
  129                 db_printf("usage: show all procs [/a] [/n] [/w]\n");
  130                 db_printf("\t/a == show process address info\n");
  131                 db_printf("\t/l == show LWP info\n");
  132                 db_printf("\t/n == show normal process info [default]\n");
  133                 db_printf("\t/w == show process wait/emul info\n");
  134                 return;
  135         }
  136 
  137         switch (*mode) {
  138         case 'a':
  139                 db_printf(" PID       %10s %18s %18s %18s\n",
  140                     "COMMAND", "STRUCT PROC *", "UAREA *", "VMSPACE/VM_MAP");
  141                 break;
  142         case 'l':
  143                 db_printf(" PID        %4s S %9s %18s %18s %-12s\n",
  144                     "LID", "FLAGS", "STRUCT LWP *", "UAREA *", "WAIT");
  145                 break;
  146         case 'n':
  147                 db_printf(" PID       %8s %8s %10s S %7s %4s %16s %7s\n",
  148                     "PPID", "PGRP", "UID", "FLAGS", "LWPS", "COMMAND", "WAIT");
  149                 break;
  150         case 'w':
  151                 db_printf(" PID       %10s %8s %4s %5s %5s %-12s%s\n",
  152                     "COMMAND", "EMUL", "PRI", "UTIME", "STIME",
  153                     "WAIT-MSG", "WAIT-CHANNEL");
  154                 break;
  155         }
  156 
  157         /* XXX LOCKING XXX */
  158         pd = proclists;
  159         cp = curproc;
  160         cl = curlwp;
  161         for (pd = proclists; pd->pd_list != NULL; pd++) {
  162                 LIST_FOREACH(p, pd->pd_list, p_list) {
  163                         pp = p->p_pptr;
  164                         if (p->p_stat == 0) {
  165                                 continue;
  166                         }
  167                         l = LIST_FIRST(&p->p_lwps);
  168                         db_printf("%c%-10d", " >"[cp == p], p->p_pid);
  169 
  170                         switch (*mode) {
  171 
  172                         case 'a':
  173                                 db_printf("%10.10s %18p %18p %18p\n",
  174                                     p->p_comm, p,
  175                                     l != NULL ? l->l_addr : 0,
  176                                     p->p_vmspace);
  177                                 break;
  178                         case 'l':
  179                                  while (l != NULL) {
  180                                         db_printf("%c%4d %d %#9x %18p %18p %s\n",
  181                                             " >"[cl == l], l->l_lid,
  182                                             l->l_stat, l->l_flag, l, 
  183                                             l->l_addr, 
  184                                             (l->l_wchan && l->l_wmesg) ?
  185                                             l->l_wmesg : "");
  186 
  187                                         l = LIST_NEXT(l, l_sibling);
  188                                         if (l)
  189                                                 db_printf("%11s","");
  190                                 }
  191                                 break;
  192                         case 'n':
  193                                 db_printf("%8d %8d %10d %d %#7x %4d %16s %7.7s\n",
  194                                     pp ? pp->p_pid : -1, p->p_pgrp->pg_id,
  195                                     p->p_cred->p_ruid, p->p_stat, p->p_flag,
  196                                     p->p_nlwps, p->p_comm,
  197                                     (p->p_nlwps != 1) ? "*" : (
  198                                     (l->l_wchan && l->l_wmesg) ? 
  199                                     l->l_wmesg : ""));
  200                                 break;
  201 
  202                         case 'w':
  203                                 db_printf("%10s %8s %4d", p->p_comm,
  204                                     p->p_emul->e_name,
  205                                     (l != NULL) ? l->l_priority : -1);
  206                                 calcru(p, &tv[0], &tv[1], NULL);
  207                                 for (i = 0; i < 2; ++i) {
  208                                         db_printf("%4ld.%1ld",
  209                                             (long)tv[i].tv_sec,
  210                                             (long)tv[i].tv_usec/100000);
  211                                 }
  212                                 if (p->p_nlwps == 1) {
  213                                 if (l->l_wchan && l->l_wmesg) {
  214                                         db_printf(" %-12s", l->l_wmesg);
  215                                         db_printsym(
  216                                             (db_expr_t)(intptr_t)l->l_wchan,
  217                                             DB_STGY_XTRN, db_printf);
  218                                 } } else {
  219                                         db_printf(" * ");
  220                                 }
  221                                 db_printf("\n");
  222                                 break;
  223 
  224                         }
  225                 }
  226         }
  227 }
  228 
  229 void
  230 db_dmesg(db_expr_t addr, int haddr, db_expr_t count, char *modif)
  231 {
  232         struct kern_msgbuf *mbp;
  233         db_expr_t print;
  234         int ch, newl, skip, i;
  235         char *p, *bufdata;
  236 
  237         if (!msgbufenabled || msgbufp->msg_magic != MSG_MAGIC) {
  238                 db_printf("message buffer not available\n");
  239                 return;
  240         }
  241 
  242         mbp = msgbufp;
  243         bufdata = &mbp->msg_bufc[0];
  244 
  245         if (haddr && addr < mbp->msg_bufs)
  246                 print = addr;
  247         else
  248                 print = mbp->msg_bufs;
  249 
  250         for (newl = skip = i = 0, p = bufdata + mbp->msg_bufx;
  251             i < mbp->msg_bufs; i++, p++) {
  252                 if (p == bufdata + mbp->msg_bufs)
  253                         p = bufdata;
  254                 if (i < mbp->msg_bufs - print)
  255                         continue;
  256                 ch = *p;
  257                 /* Skip "\n<.*>" syslog sequences. */
  258                 if (skip) {
  259                         if (ch == '>')
  260                                 newl = skip = 0;
  261                         continue;
  262                 }
  263                 if (newl && ch == '<') {
  264                         skip = 1;
  265                         continue;
  266                 }
  267                 if (ch == '\0')
  268                         continue;
  269                 newl = ch == '\n';
  270                 db_printf("%c", ch);
  271         }
  272         if (!newl)
  273                 db_printf("\n");
  274 }
  275 
  276 void
  277 db_show_sched_qs(db_expr_t addr, int haddr, db_expr_t count, char *modif)
  278 {
  279         struct prochd *ph;
  280         struct lwp *l;
  281         int i, first;
  282 
  283         for (i = 0; i < RUNQUE_NQS; i++)
  284         {
  285                 first = 1;
  286                 ph = &sched_qs[i];
  287                 for (l = ph->ph_link; l != (struct lwp *)ph; l = l->l_forw) {
  288                         if (first) {
  289                                 db_printf("%c%d",
  290                                     (sched_whichqs & (1U << i))
  291                                     ? ' ' : '!', i);
  292                                 first = 0;
  293                         }
  294                         db_printf("\t%d.%d (%s)\n", l->l_proc->p_pid,
  295                             l->l_lid, l->l_proc->p_comm);
  296                 }
  297         }
  298 }
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FreeBSD/Linux Kernel Cross Reference sys/ddb/db_xxx.c

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