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93a7aa79d6
(show thread {address}) Remove the IDLE kse state and replace it with a change in the way threads sahre KSEs. Every KSE now has a thread, which is considered its "owner" however a KSE may also be lent to other threads in the same group to allow completion of in-kernel work. n this case the owner remains the same and the KSE will revert to the owner when the other work has been completed. All creations of upcalls etc. is now done from kse_reassign() which in turn is called from mi_switch or thread_exit(). This means that special code can be removed from msleep() and cv_wait(). kse_release() does not leave a KSE with no thread any more but converts the existing thread into teh KSE's owner, and sets it up for doing an upcall. It is just inhibitted from being scheduled until there is some reason to do an upcall. Remove all trace of the kse_idle queue since it is no-longer needed. "Idle" KSEs are now on the loanable queue.
228 lines
5.6 KiB
C
228 lines
5.6 KiB
C
/*-
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* Copyright (c) 1993 The Regents of the University of California.
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* 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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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/cons.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <vm/pmap.h>
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#include <ddb/ddb.h>
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static void
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dumpthread(volatile struct proc *p, volatile struct thread *td);
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void
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db_ps(dummy1, dummy2, dummy3, dummy4)
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db_expr_t dummy1;
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boolean_t dummy2;
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db_expr_t dummy3;
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char * dummy4;
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{
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int np;
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int nl = 0;
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volatile struct proc *p, *pp;
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volatile struct thread *td;
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char *state;
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np = nprocs;
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/* sx_slock(&allproc_lock); */
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if (!LIST_EMPTY(&allproc))
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p = LIST_FIRST(&allproc);
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else
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p = &proc0;
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db_printf(" pid proc addr uid ppid pgrp flag stat wmesg wchan cmd\n");
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while (--np >= 0) {
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/*
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* XXX just take 20 for now...
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*/
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if (nl++ == 20) {
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int c;
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db_printf("--More--");
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c = cngetc();
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db_printf("\r");
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/*
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* A whole screenfull or just one line?
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*/
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switch (c) {
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case '\n': /* just one line */
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nl = 20;
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break;
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case ' ':
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nl = 0; /* another screenfull */
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break;
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default: /* exit */
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db_printf("\n");
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return;
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}
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}
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if (p == NULL) {
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printf("oops, ran out of processes early!\n");
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break;
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}
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/* PROC_LOCK(p); */
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pp = p->p_pptr;
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if (pp == NULL)
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pp = p;
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switch(p->p_state) {
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case PRS_NORMAL:
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if (P_SHOULDSTOP(p))
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state = "stop";
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else
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state = "norm";
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break;
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case PRS_NEW:
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state = "new ";
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break;
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case PRS_ZOMBIE:
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state = "zomb";
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break;
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default:
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state = "Unkn";
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break;
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}
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db_printf("%5d %8p %8p %4d %5d %5d %07x %-4s",
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p->p_pid, (volatile void *)p, (void *)p->p_uarea,
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p->p_ucred != NULL ? p->p_ucred->cr_ruid : 0, pp->p_pid,
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p->p_pgrp != NULL ? p->p_pgrp->pg_id : 0, p->p_flag,
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state);
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if (p->p_flag & P_KSES)
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db_printf("(threaded) %s\n", p->p_comm);
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FOREACH_THREAD_IN_PROC(p, td) {
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dumpthread(p, td);
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}
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/* PROC_UNLOCK(p); */
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p = LIST_NEXT(p, p_list);
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if (p == NULL && np > 0)
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p = LIST_FIRST(&zombproc);
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}
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/* sx_sunlock(&allproc_lock); */
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}
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static void
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dumpthread(volatile struct proc *p, volatile struct thread *td)
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{
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if (p->p_flag & P_KSES)
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db_printf( " thread %p ksegrp %p ", td, td->td_ksegrp);
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if (TD_ON_SLEEPQ(td)) {
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if (td->td_flags & TDF_CVWAITQ)
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db_printf("[CVQ ");
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else
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db_printf("[SLPQ ");
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db_printf(" %6s %8p]", td->td_wmesg,
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(void *)td->td_wchan);
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}
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switch (td->td_state) {
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case TDS_INHIBITED:
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if (TD_ON_LOCK(td)) {
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db_printf("[LOCK %6s %8p]",
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td->td_lockname,
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(void *)td->td_blocked);
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}
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if (TD_IS_SLEEPING(td)) {
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db_printf("[SLP]");
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}
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if (TD_IS_SWAPPED(td)) {
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db_printf("[SWAP]");
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}
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if (TD_IS_SUSPENDED(td)) {
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db_printf("[SUSP]");
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}
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if (TD_AWAITING_INTR(td)) {
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db_printf("[IWAIT]");
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}
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if (TD_LENDER(td)) {
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db_printf("[LOAN]");
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}
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if (TD_IS_IDLE(td)) {
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db_printf("[IDLE]");
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}
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if (TD_IS_EXITING(td)) {
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db_printf("[EXIT]");
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}
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break;
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case TDS_CAN_RUN:
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db_printf("[Can run]");
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break;
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case TDS_RUNQ:
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db_printf("[RUNQ]");
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break;
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case TDS_RUNNING:
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db_printf("[CPU %d]", td->td_kse->ke_oncpu);
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break;
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default:
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panic("unknown thread state");
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}
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if (p->p_flag & P_KSES) {
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if (td->td_kse)
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db_printf("[kse %p]", td->td_kse);
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db_printf("\n");
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} else
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db_printf(" %s\n", p->p_comm);
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}
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#define INKERNEL(va) (((vm_offset_t)(va)) >= USRSTACK)
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void
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db_show_one_thread(db_expr_t addr, boolean_t have_addr,
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db_expr_t count, char *modif)
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{
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struct proc *p;
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struct thread *td;
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if (!have_addr)
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td = curthread;
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else if (!INKERNEL(addr)) {
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printf("bad thread address");
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return;
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} else
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td = (struct thread *)addr;
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/* quick sanity check */
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if ((p = td->td_proc) != td->td_ksegrp->kg_proc)
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return;
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printf("Proc %p ",p);
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dumpthread(p, td);
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#ifdef __i386__
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db_stack_thread((db_expr_t)td, 1, count, modif);
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#endif
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}
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