/*-
 * Copyright (c) 1993 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD: src/sys/ddb/db_ps.c,v 1.20 1999/08/28 00:41:09 peter Exp $
 */
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/cons.h>

#include <ddb/ddb.h>

static void db_dump_td_tokens(thread_t td);

void
db_ps(db_expr_t dummy1, boolean_t dummy2, db_expr_t dummy3, char *dummy4)
{
        int np;
        int cpuidx;
        int nl = 0;

        np = nprocs;

#if 0
        if (allproc.lh_first != NULL)
                p = allproc.lh_first;
        else
                p = &proc0;
        lp = FIRST_LWP_IN_PROC(__DEVOLATILE(struct proc *, p));

        if (db_more(&nl) < 0)
            return;
        db_printf("  pid      lwp  uid  ppid  pgrp  pflags lflags stat  wmesg    wchan cmd\n");
        for (;;) {
                while (lp == NULL) {
                        --np;
                        p = p->p_list.le_next;
                        if (p == NULL && np > 0)
                                p = zombproc.lh_first;
                        if (p == NULL)
                                break;
                        lp = FIRST_LWP_IN_PROC(__DEVOLATILE(struct proc *, p));
                }
                /*
                 * XXX just take 20 for now...
                 */
                if (db_more(&nl) < 0)
                        return;
                if (p == NULL) {
                        kprintf("oops, ran out of processes early!\n");
                        break;
                }
                pp = p->p_pptr;
                if (pp == NULL)
                        pp = p;

                db_printf("%5d %8p %4d %5d %5d %06x %06x  %d %d",
                    p->p_pid, (volatile void *)lp,
                    p->p_ucred ? p->p_ucred->cr_ruid : 0, pp->p_pid,
                    p->p_pgrp ? p->p_pgrp->pg_id : 0, p->p_flags,
                    lp->lwp_flags, p->p_stat, lp->lwp_stat);
                if (lp->lwp_wchan) {
                        db_printf(" %6s %8p",
                                (lp->lwp_wmesg ? lp->lwp_wmesg : "?"),
                                lp->lwp_wchan);
                } else {
                        db_printf("                 ");
                }
                db_printf(" %s\n", p->p_comm ? p->p_comm : "");
                db_dump_td_tokens(lp->lwp_thread);

                lp = lwp_rb_tree_RB_NEXT(lp);
        }
#endif

        /*
         * Dump running threads
         */
        for (cpuidx = 0; cpuidx < ncpus; ++cpuidx) {
            struct globaldata *gd = globaldata_find(cpuidx);
            thread_t td;
            int j;

            if (db_more(&nl) < 0)
                return;
            db_printf("cpu %d curthread %p reqflags %04x\n",
                    gd->gd_cpuid, gd->gd_curthread, gd->gd_reqflags);
            if (gd->gd_curthread && gd->gd_curthread->td_preempted) {
                    db_printf("       PREEMPTING THREAD %p\n",
                                gd->gd_curthread->td_preempted);
            }

            if (db_more(&nl) < 0)
                return;
            db_printf("      INCOMING IPIQS:");
            for (j = 0; j < ncpus; ++j) {
                lwkt_ipiq_t ip = globaldata_find(j)->gd_ipiq;
                if (ip != NULL) {
                    ip = &ip[cpuidx];
                    if (ip->ip_windex != ip->ip_rindex)
                        db_printf(" cpu%d:%d", j, ip->ip_windex - ip->ip_rindex);
                }
            }
            db_printf("\n");

            if (db_more(&nl) < 0)
                return;
            db_printf("  tdq     thread pid    flags pri/cs/mp        sp    wmesg wchan comm\n");
            TAILQ_FOREACH(td, &gd->gd_tdrunq, td_threadq) {
                if (db_more(&nl) < 0)
                    return;
                db_printf("  %p %3d %08x %2d/%02d %p %8.8s %p %s\n",
                    td,
                    (td->td_proc ? td->td_proc->p_pid : -1),
                    td->td_flags,
                    td->td_pri,
                    td->td_critcount,
                    td->td_sp,
                    td->td_wmesg ? td->td_wmesg : "-",
                    td->td_wchan,
                    td->td_proc ? td->td_proc->p_comm : td->td_comm);
                if (td->td_preempted)
                    db_printf("  PREEMPTING THREAD %p\n", td->td_preempted);
                db_dump_td_tokens(td);
            }
            if (db_more(&nl) < 0)
                return;
            db_printf("\n");
            if (db_more(&nl) < 0)
                return;
            db_printf("  tdq     thread pid    flags pri/cs/mp        sp    wmesg wchan comm\n");
            TAILQ_FOREACH(td, &gd->gd_tdallq, td_allq) {
                if (td->td_flags & TDF_MARKER)
                    continue;
                if (db_more(&nl) < 0)
                    return;
                db_printf("  %3d %p %3d %08x %2d/%02d %p %8.8s %p %s\n",
                    np, td, 
                    (td->td_proc ? td->td_proc->p_pid : -1),
                    td->td_flags,
                    td->td_pri,
                    td->td_critcount,
                    td->td_sp,
                    td->td_wmesg ? td->td_wmesg : "-",
                    td->td_wchan,
                    td->td_proc ? td->td_proc->p_comm : td->td_comm);
                db_dump_td_tokens(td);
            }
        }
        if (db_more(&nl) < 0)
            return;
        db_printf("CURCPU %d CURTHREAD %p (%d)\n",
            mycpu->gd_cpuid,
            curthread,
            (curthread->td_proc ? curthread->td_proc->p_pid : -1));
        db_dump_td_tokens(curthread);
}

static void
db_dump_td_tokens(thread_t td)
{
        lwkt_tokref_t ref;
        lwkt_token_t tok;

        if (TD_TOKS_NOT_HELD(td))
                return;
        db_printf("    TOKENS:");
        for (ref = &td->td_toks_base; ref < td->td_toks_stop; ++ref) {
                tok = ref->tr_tok;

                db_printf(" %p[tok=%p", ref, ref->tr_tok);
                if (tok->t_ref && td == tok->t_ref->tr_owner)
                    db_printf(",held");
                db_printf("]");
        }
        db_printf("\n");
}