db_xxx.c

Version: - FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
    1 /*      $NetBSD: db_xxx.c,v 1.75 2020/05/23 23:42:42 ad 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 1.75 2020/05/23 23:42:42 ad 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/atomic.h>
   54 #include <sys/systm.h>
   55 #include <sys/kernel.h>
   56 #include <sys/proc.h>
   57 #include <sys/msgbuf.h>
   58 #include <sys/callout.h>
   59 #include <sys/file.h>
   60 #include <sys/filedesc.h>
   61 #include <sys/lockdebug.h>
   62 #include <sys/signalvar.h>
   63 #include <sys/resourcevar.h>
   64 #include <sys/pool.h>
   65 #include <sys/uio.h>
   66 #include <sys/kauth.h>
   67 #include <sys/mqueue.h>
   68 #include <sys/vnode.h>
   69 #include <sys/module.h>
   70 #include <sys/cpu.h>
   71 #include <sys/vmem.h>
   72 
   73 #include <ddb/ddb.h>
   74 #include <ddb/db_user.h>
   75 
   76 #ifdef KGDB
   77 #include <sys/kgdb.h>
   78 #endif
   79 
   80 void
   81 db_kill_proc(db_expr_t addr, bool haddr,
   82     db_expr_t count, const char *modif)
   83 {
   84 #ifdef _KERNEL  /* XXX CRASH(8) */
   85         struct proc *p;
   86         ksiginfo_t      ksi;
   87         db_expr_t pid, sig;
   88         int t;
   89 
   90         /* What pid? */
   91         if (!db_expression(&pid)) {
   92                db_error("pid?\n");
   93                /*NOTREACHED*/
   94         }
   95         /* What sig? */
   96         t = db_read_token();
   97         if (t == tCOMMA) {
   98                if (!db_expression(&sig)) {
   99                        db_error("sig?\n");
  100                        /*NOTREACHED*/
  101                }
  102         } else {
  103                db_unread_token(t);
  104                sig = 15;
  105         }
  106         if (db_read_token() != tEOL) {
  107                db_error("?\n");
  108                /*NOTREACHED*/
  109         }
  110         /* We might stop when the mutex is held or when not */
  111         t = mutex_tryenter(&proc_lock);
  112 #ifdef DIAGNOSTIC
  113         if (!t) {
  114                db_error("could not acquire proc_lock mutex\n");
  115                /*NOTREACHED*/
  116         }
  117 #endif
  118         p = proc_find((pid_t)pid);
  119         if (p == NULL) {
  120                 if (t)
  121                         mutex_exit(&proc_lock);
  122                 db_error("no such proc\n");
  123                 /*NOTREACHED*/
  124         }
  125         KSI_INIT(&ksi);
  126         ksi.ksi_signo = sig;
  127         ksi.ksi_code = SI_USER;
  128         ksi.ksi_pid = 0;
  129         ksi.ksi_uid = 0;
  130         mutex_enter(p->p_lock);
  131         kpsignal2(p, &ksi);
  132         mutex_exit(p->p_lock);
  133         if (t)
  134                 mutex_exit(&proc_lock);
  135 #else
  136         db_kernelonly();
  137 #endif
  138 }
  139 
  140 #ifdef KGDB
  141 void
  142 db_kgdb_cmd(db_expr_t addr, bool haddr,
  143     db_expr_t count, const char *modif)
  144 {
  145         kgdb_active++;
  146         kgdb_trap(db_trap_type, DDB_REGS);
  147         kgdb_active--;
  148 }
  149 #endif
  150 
  151 void
  152 db_show_files_cmd(db_expr_t addr, bool haddr,
  153               db_expr_t count, const char *modif)
  154 {
  155 #ifdef _KERNEL  /* XXX CRASH(8) */
  156         struct proc *p;
  157         int i;
  158         filedesc_t *fdp;
  159         fdfile_t *ff;
  160         file_t *fp;
  161         struct vnode *vp;
  162         bool full = false;
  163         fdtab_t *dt;
  164 
  165         if (!haddr) {
  166                 db_printf("usage: show files address\n");
  167                 db_printf("\taddress == an address of a proc structure\n");
  168                 return;
  169         }
  170 
  171         if (modif[0] == 'f')
  172                 full = true;
  173 
  174         p = (struct proc *) (uintptr_t) addr;
  175 
  176         fdp = p->p_fd;
  177         dt = atomic_load_consume(&fdp->fd_dt);
  178         for (i = 0; i < dt->dt_nfiles; i++) {
  179                 if ((ff = dt->dt_ff[i]) == NULL)
  180                         continue;
  181 
  182                 fp = atomic_load_consume(&ff->ff_file);
  183 
  184                 /* Only look at vnodes... */
  185                 if (fp != NULL && fp->f_type == DTYPE_VNODE
  186                     && fp->f_vnode != NULL) {
  187                         vp = fp->f_vnode;
  188                         vfs_vnode_print(vp, full, db_printf);
  189 
  190 #ifdef LOCKDEBUG
  191                         db_printf("\nv_uobj.vmobjlock lock details:\n");
  192                         lockdebug_lock_print(vp->v_uobj.vmobjlock, db_printf);
  193                         db_printf("\n");
  194 #endif
  195                 }
  196         }
  197 #endif
  198 }
  199 
  200 #ifdef AIO
  201 void
  202 db_show_aio_jobs(db_expr_t addr, bool haddr,
  203     db_expr_t count, const char *modif)
  204 {
  205 
  206         aio_print_jobs(db_printf);
  207 }
  208 #endif
  209 
  210 #ifdef MQUEUE
  211 void
  212 db_show_mqueue_cmd(db_expr_t addr, bool haddr,
  213     db_expr_t count, const char *modif)
  214 {
  215 
  216 #ifdef _KERNEL  /* XXX CRASH(8) */
  217         mqueue_print_list(db_printf);
  218 #endif
  219 }
  220 #endif
  221 
  222 void
  223 db_show_module_cmd(db_expr_t addr, bool haddr,
  224     db_expr_t count, const char *modif)
  225 {
  226 
  227 #ifdef _KERNEL  /* XXX CRASH(8) */
  228         module_print_list(db_printf);
  229 #endif
  230 }
  231 
  232 void
  233 db_show_all_pools(db_expr_t addr, bool haddr,
  234     db_expr_t count, const char *modif)
  235 {
  236 
  237 #ifdef _KERNEL  /* XXX CRASH(8) */
  238         pool_printall(modif, db_printf);
  239 #endif
  240 }
  241 
  242 void
  243 db_show_all_vmems(db_expr_t addr, bool have_addr,
  244     db_expr_t count, const char *modif)
  245 {
  246 
  247 #ifdef _KERNEL  /* XXX CRASH(8) */
  248         vmem_printall(modif, db_printf);
  249 #endif
  250 }
  251 
  252 void
  253 db_dmesg(db_expr_t addr, bool haddr, db_expr_t count, const char *modif)
  254 {
  255         struct kern_msgbuf mb, *mbp;
  256         db_expr_t print;
  257         int newl, skip, i;
  258         char *p, *bufdata, ch;
  259 
  260         if (!db_read_int("msgbufenabled")) {
  261                 db_printf("message buffer not available\n");
  262                 return;
  263         }
  264         mbp = (struct kern_msgbuf *)db_read_ptr("msgbufp");
  265         db_read_bytes((db_addr_t)mbp, sizeof(mb), (char *)&mb);
  266         if (mb.msg_magic != MSG_MAGIC) {
  267                 db_printf("message buffer not available\n");
  268                 return;
  269         }
  270 
  271         bufdata = &mbp->msg_bufc[0];
  272 
  273         if (haddr && addr < mb.msg_bufs)
  274                 print = addr;
  275         else
  276                 print = mb.msg_bufs;
  277 
  278         for (newl = skip = i = 0, p = bufdata + mb.msg_bufx;
  279             i < mb.msg_bufs; i++, p++) {
  280                 if (p == bufdata + mb.msg_bufs)
  281                         p = bufdata;
  282                 if (i < mb.msg_bufs - print) {
  283                         continue;
  284                 }
  285                 db_read_bytes((db_addr_t)p, sizeof(ch), &ch);
  286                 /* Skip "\n<.*>" syslog sequences. */
  287                 if (skip) {
  288                         if (ch == '>')
  289                                 newl = skip = 0;
  290                         continue;
  291                 }
  292                 if (newl && ch == '<') {
  293                         skip = 1;
  294                         continue;
  295                 }
  296                 if (ch == '\0')
  297                         continue;
  298                 newl = ch == '\n';
  299                 db_printf("%c", ch);
  300         }
  301         if (!newl)
  302                 db_printf("\n");
  303 }
  304 
  305 void
  306 db_show_sched_qs(db_expr_t addr, bool haddr,
  307     db_expr_t count, const char *modif)
  308 {
  309 
  310 #ifdef _KERNEL  /* XXX CRASH(8) */
  311         sched_print_runqueue(db_printf);
  312 #endif
  313 }
  314 
  315 void
  316 db_show_panic(db_expr_t addr, bool haddr, db_expr_t count, const char *modif)
  317 {
  318 #ifdef _KERNEL  /* XXX CRASH(8) */
  319         int s;
  320 
  321         s = splhigh();
  322 
  323         db_printf("Panic string: %s\n", panicstr);
  324 
  325         (void)splx(s);
  326 #endif
  327 }
Cache object: 6df6280c9fe95834b61bf01d541c12fb
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.
FreeBSD/Linux Kernel Cross Reference sys/ddb/db_xxx.c

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