1b84adbe5f
done by Artur Grabowski and Thomas Nordin for OpenBSD, which is more efficient in several ways than the callwheel implementation that it is replacing. It has been adapted to our pre-existing callout API, and also provides the slightly more efficient (and much more intuitive) API (adapted to the callout_*() naming scheme) that the OpenBSD version provides. Among other things, this shaves a bunch of cycles off rescheduling-in- the-future a callout which is already scheduled, which the common case for TCP timers (notably REXMT and KEEP). The API has been simplified a bit, as well. The (very confusing to a good many people) "ACTIVE" state for callouts has gone away. There is now only "PENDING" (scheduled to fire in the future) and "EXPIRED" (has fired, and the function called). Kernel version bump not done; we'll ride the 1.6N bump that happened with the malloc(9) change.
251 lines
6.6 KiB
C
251 lines
6.6 KiB
C
/* $NetBSD: db_xxx.c,v 1.20 2003/02/04 01:21:04 thorpej Exp $ */
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/*
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* Copyright (c) 1982, 1986, 1989, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: kern_proc.c 8.4 (Berkeley) 1/4/94
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*/
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/*
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* Miscellaneous DDB functions that are intimate (xxx) with various
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* data structures and functions used by the kernel (proc, callout).
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: db_xxx.c,v 1.20 2003/02/04 01:21:04 thorpej Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/msgbuf.h>
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#include <sys/callout.h>
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#include <sys/signalvar.h>
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#include <sys/resourcevar.h>
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#include <machine/db_machdep.h>
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#include <ddb/db_access.h>
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#include <ddb/db_command.h>
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#include <ddb/db_interface.h>
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#include <ddb/db_lex.h>
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#include <ddb/db_output.h>
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#include <ddb/db_sym.h>
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#include <ddb/db_extern.h>
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void
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db_kill_proc(db_expr_t addr, int haddr, db_expr_t count, char *modif)
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{
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struct proc *p;
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db_expr_t pid, sig;
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int t;
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/* What pid? */
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if (!db_expression(&pid)) {
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db_error("pid?\n");
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/*NOTREACHED*/
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}
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/* What sig? */
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t = db_read_token();
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if (t == tCOMMA) {
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if (!db_expression(&sig)) {
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db_error("sig?\n");
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/*NOTREACHED*/
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}
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} else {
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db_unread_token(t);
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sig = 15;
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}
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if (db_read_token() != tEOL) {
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db_error("?\n");
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/*NOTREACHED*/
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}
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p = pfind((pid_t)pid);
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if (p == NULL) {
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db_error("no such proc\n");
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/*NOTREACHED*/
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}
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psignal(p, (int)sig);
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}
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void
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db_show_all_procs(db_expr_t addr, int haddr, db_expr_t count, char *modif)
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{
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int i;
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char *mode;
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struct proc *p, *pp, *cp;
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struct lwp *l, *cl;
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struct timeval tv[2];
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const struct proclist_desc *pd;
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if (modif[0] == 0)
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modif[0] = 'n'; /* default == normal mode */
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mode = strchr("mawln", modif[0]);
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if (mode == NULL || *mode == 'm') {
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db_printf("usage: show all procs [/a] [/n] [/w]\n");
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db_printf("\t/a == show process address info\n");
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db_printf("\t/l == show LWP info\n");
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db_printf("\t/n == show normal process info [default]\n");
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db_printf("\t/w == show process wait/emul info\n");
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return;
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}
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switch (*mode) {
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case 'a':
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db_printf(" PID %10s %18s %18s %18s\n",
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"COMMAND", "STRUCT PROC *", "UAREA *", "VMSPACE/VM_MAP");
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break;
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case 'l':
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db_printf(" PID %4s S %7s %18s %18s %-12s\n",
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"LID", "FLAGS", "STRUCT LWP *", "UAREA *", "WAIT");
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break;
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case 'n':
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db_printf(" PID %8s %8s %10s S %7s %4s %16s %7s\n",
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"PPID", "PGRP", "UID", "FLAGS", "LWPS", "COMMAND", "WAIT");
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break;
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case 'w':
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db_printf(" PID %10s %8s %4s %5s %5s %-12s%s\n",
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"COMMAND", "EMUL", "PRI", "UTIME", "STIME",
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"WAIT-MSG", "WAIT-CHANNEL");
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break;
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}
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/* XXX LOCKING XXX */
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pd = proclists;
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cp = curproc;
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cl = curlwp;
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for (pd = proclists; pd->pd_list != NULL; pd++) {
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LIST_FOREACH(p, pd->pd_list, p_list) {
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pp = p->p_pptr;
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if (p->p_stat == 0) {
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continue;
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}
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l = LIST_FIRST(&p->p_lwps);
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db_printf("%c%-10d", " >"[cp == p], p->p_pid);
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switch (*mode) {
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case 'a':
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db_printf("%10.10s %18p %18p %18p\n",
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p->p_comm, p,
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l != NULL ? l->l_addr : 0,
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p->p_vmspace);
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break;
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case 'l':
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while (l != NULL) {
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db_printf("%c%4d %d %#7x %18p %18p %s\n",
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" >"[cl == l], l->l_lid,
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l->l_stat, l->l_flag, l,
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l->l_addr,
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(l->l_wchan && l->l_wmesg) ?
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l->l_wmesg : "");
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l = LIST_NEXT(l, l_sibling);
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if (l)
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db_printf("%11s","");
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}
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break;
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case 'n':
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db_printf("%8d %8d %10d %d %#7x %4d %16s %7.7s\n",
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pp ? pp->p_pid : -1, p->p_pgrp->pg_id,
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p->p_cred->p_ruid, p->p_stat, p->p_flag,
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p->p_nlwps, p->p_comm,
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(p->p_nlwps != 1) ? "*" : (
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(l->l_wchan && l->l_wmesg) ?
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l->l_wmesg : ""));
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break;
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case 'w':
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db_printf("%10s %8s %4d", p->p_comm,
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p->p_emul->e_name,
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(l != NULL) ? l->l_priority : -1);
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calcru(p, &tv[0], &tv[1], NULL);
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for (i = 0; i < 2; ++i) {
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db_printf("%4ld.%1ld",
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(long)tv[i].tv_sec,
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(long)tv[i].tv_usec/100000);
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}
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if (p->p_nlwps == 1) {
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if (l->l_wchan && l->l_wmesg) {
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db_printf(" %-12s", l->l_wmesg);
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db_printsym(
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(db_expr_t)(intptr_t)l->l_wchan,
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DB_STGY_XTRN, db_printf);
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} } else {
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db_printf(" * ");
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}
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db_printf("\n");
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break;
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}
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}
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}
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}
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void
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db_dmesg(db_expr_t addr, int haddr, db_expr_t count, char *modif)
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{
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struct kern_msgbuf *mbp;
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int ch, newl, skip, i;
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char *p, *bufdata;
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mbp = msgbufp;
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bufdata = &mbp->msg_bufc[0];
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for (newl = skip = i = 0, p = bufdata + mbp->msg_bufx;
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i < mbp->msg_bufs; i++, p++) {
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if (p == bufdata + mbp->msg_bufs)
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p = bufdata;
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ch = *p;
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/* Skip "\n<.*>" syslog sequences. */
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if (skip) {
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if (ch == '>')
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newl = skip = 0;
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continue;
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}
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if (newl && ch == '<') {
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skip = 1;
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continue;
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}
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if (ch == '\0')
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continue;
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newl = ch == '\n';
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db_printf("%c", ch);
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}
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if (!newl)
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db_printf("\n");
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}
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