d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
480f31c214
freebsd-nq/sys/ddb/db_ps.c
Bruce Evans 2b7a7ace9e In ddb ps, left justify the non-numeric fields 'state' and 'wmesg' and 
the fixed-width numeric field 'wchan', as in ps(1).  They were sort
of centered, although the template shows 'state' as right-justified.
The `wmesg' field very rarely has a prefix of '*' (for lock names)
that is still to the left of the header, and the width of this field
is reduced from 8 to 7 (more than 6 is an error).

The 'wmesg' and 'wchan' fields are still misnamed and poorly handled.
They are named sort of backwards relative to ps(1):
- wmesg in ddb = mwchan in ps
- wmesg in ddb = wchan in ps (if it is a wait channel name, not a lock name)
- wchan in ddb = nwchan in ps
ddb ps wastes lots of space for the unimportant 'wchan' field (20
columns altogether on 64-bit arches).  ps(1) documents using a
compressed format, but the compression only omits leading nybbles of
0 so it has neveqr worked on arches that put the kernel in the top half
of the address space.  It just avoids wasting space for an 0x prefix.
2016-08-14 15:26:40 +00:00

496 lines
13 KiB
C
Raw Blame History

/*-
* 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.
* 4. 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include "opt_kstack_pages.h"
#include <sys/param.h>
#include <sys/cons.h>
#include <sys/jail.h>
#include <sys/kdb.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/sysent.h>
#include <sys/systm.h>
#include <sys/_kstack_cache.h>
#include <vm/vm.h>
#include <vm/vm_param.h>
#include <vm/pmap.h>
#include <ddb/ddb.h>
static void dumpthread(volatile struct proc *p, volatile struct thread *td,
int all);
/*
* At least one non-optional show-command must be implemented using
* DB_SHOW_ALL_COMMAND() so that db_show_all_cmd_set gets created.
* Here is one.
*/
DB_SHOW_ALL_COMMAND(procs, db_procs_cmd)
{
db_ps(addr, have_addr, count, modif);
}
/*
* Layout:
* - column counts
* - header
* - single-threaded process
* - multi-threaded process
* - thread in a MT process
*
* 1 2 3 4 5 6 7
* 1234567890123456789012345678901234567890123456789012345678901234567890
* pid ppid pgrp uid state wmesg wchan cmd
* <pid> <ppi> <pgi> <uid> <stat> <wmesg> <wchan > <name>
* <pid> <ppi> <pgi> <uid> <stat> (threaded) <command>
* <tid > <stat> <wmesg> <wchan > <name>
*
* For machines with 64-bit pointers, we expand the wchan field 8 more
* characters.
*/
void
db_ps(db_expr_t addr, bool hasaddr, db_expr_t count, char *modif)
{
volatile struct proc *p, *pp;
volatile struct thread *td;
struct ucred *cred;
struct pgrp *pgrp;
char state[9];
int np, rflag, sflag, dflag, lflag, wflag;
np = nprocs;
if (!LIST_EMPTY(&allproc))
p = LIST_FIRST(&allproc);
else
p = &proc0;
#ifdef __LP64__
db_printf(" pid ppid pgrp uid state wmesg wchan cmd\n");
#else
db_printf(" pid ppid pgrp uid state wmesg wchan cmd\n");
#endif
while (--np >= 0 && !db_pager_quit) {
if (p == NULL) {
db_printf("oops, ran out of processes early!\n");
break;
}
pp = p->p_pptr;
if (pp == NULL)
pp = p;
cred = p->p_ucred;
pgrp = p->p_pgrp;
db_printf("%5d %5d %5d %5d ", p->p_pid, pp->p_pid,
pgrp != NULL ? pgrp->pg_id : 0,
cred != NULL ? cred->cr_ruid : 0);
/* Determine our primary process state. */
switch (p->p_state) {
case PRS_NORMAL:
if (P_SHOULDSTOP(p))
state[0] = 'T';
else {
/*
* One of D, L, R, S, W. For a
* multithreaded process we will use
* the state of the thread with the
* highest precedence. The
* precendence order from high to low
* is R, L, D, S, W. If no thread is
* in a sane state we use '?' for our
* primary state.
*/
rflag = sflag = dflag = lflag = wflag = 0;
FOREACH_THREAD_IN_PROC(p, td) {
if (td->td_state == TDS_RUNNING ||
td->td_state == TDS_RUNQ ||
td->td_state == TDS_CAN_RUN)
rflag++;
if (TD_ON_LOCK(td))
lflag++;
if (TD_IS_SLEEPING(td)) {
if (!(td->td_flags & TDF_SINTR))
dflag++;
else
sflag++;
}
if (TD_AWAITING_INTR(td))
wflag++;
}
if (rflag)
state[0] = 'R';
else if (lflag)
state[0] = 'L';
else if (dflag)
state[0] = 'D';
else if (sflag)
state[0] = 'S';
else if (wflag)
state[0] = 'W';
else
state[0] = '?';
}
break;
case PRS_NEW:
state[0] = 'N';
break;
case PRS_ZOMBIE:
state[0] = 'Z';
break;
default:
state[0] = 'U';
break;
}
state[1] = '\0';
/* Additional process state flags. */
if (!(p->p_flag & P_INMEM))
strlcat(state, "W", sizeof(state));
if (p->p_flag & P_TRACED)
strlcat(state, "X", sizeof(state));
if (p->p_flag & P_WEXIT && p->p_state != PRS_ZOMBIE)
strlcat(state, "E", sizeof(state));
if (p->p_flag & P_PPWAIT)
strlcat(state, "V", sizeof(state));
if (p->p_flag & P_SYSTEM || p->p_lock > 0)
strlcat(state, "L", sizeof(state));
if (p->p_pgrp != NULL && p->p_session != NULL &&
SESS_LEADER(p))
strlcat(state, "s", sizeof(state));
/* Cheated here and didn't compare pgid's. */
if (p->p_flag & P_CONTROLT)
strlcat(state, "+", sizeof(state));
if (cred != NULL && jailed(cred))
strlcat(state, "J", sizeof(state));
db_printf(" %-6.6s ", state);
if (p->p_flag & P_HADTHREADS) {
#ifdef __LP64__
db_printf(" (threaded) ");
#else
db_printf(" (threaded) ");
#endif
if (p->p_flag & P_SYSTEM)
db_printf("[");
db_printf("%s", p->p_comm);
if (p->p_flag & P_SYSTEM)
db_printf("]");
db_printf("\n");
}
FOREACH_THREAD_IN_PROC(p, td) {
dumpthread(p, td, p->p_flag & P_HADTHREADS);
if (db_pager_quit)
break;
}
p = LIST_NEXT(p, p_list);
if (p == NULL && np > 0)
p = LIST_FIRST(&zombproc);
}
}
static void
dumpthread(volatile struct proc *p, volatile struct thread *td, int all)
{
char state[9], wprefix;
const char *wmesg;
void *wchan;
if (all) {
db_printf("%6d ", td->td_tid);
switch (td->td_state) {
case TDS_RUNNING:
snprintf(state, sizeof(state), "Run");
break;
case TDS_RUNQ:
snprintf(state, sizeof(state), "RunQ");
break;
case TDS_CAN_RUN:
snprintf(state, sizeof(state), "CanRun");
break;
case TDS_INACTIVE:
snprintf(state, sizeof(state), "Inactv");
break;
case TDS_INHIBITED:
state[0] = '\0';
if (TD_ON_LOCK(td))
strlcat(state, "L", sizeof(state));
if (TD_IS_SLEEPING(td)) {
if (td->td_flags & TDF_SINTR)
strlcat(state, "S", sizeof(state));
else
strlcat(state, "D", sizeof(state));
}
if (TD_IS_SWAPPED(td))
strlcat(state, "W", sizeof(state));
if (TD_AWAITING_INTR(td))
strlcat(state, "I", sizeof(state));
if (TD_IS_SUSPENDED(td))
strlcat(state, "s", sizeof(state));
if (state[0] != '\0')
break;
default:
snprintf(state, sizeof(state), "???");
}
db_printf(" %-6.6s ", state);
}
wprefix = ' ';
if (TD_ON_LOCK(td)) {
wprefix = '*';
wmesg = td->td_lockname;
wchan = td->td_blocked;
} else if (TD_ON_SLEEPQ(td)) {
wmesg = td->td_wmesg;
wchan = td->td_wchan;
} else if (TD_IS_RUNNING(td)) {
snprintf(state, sizeof(state), "CPU %d", td->td_oncpu);
wmesg = state;
wchan = NULL;
} else {
wmesg = "";
wchan = NULL;
}
db_printf("%c%-7.7s ", wprefix, wmesg);
if (wchan == NULL)
#ifdef __LP64__
db_printf("%18s ", "");
#else
db_printf("%10s ", "");
#endif
else
db_printf("%p ", wchan);
if (p->p_flag & P_SYSTEM)
db_printf("[");
if (td->td_name[0] != '\0')
db_printf("%s", td->td_name);
else
db_printf("%s", td->td_proc->p_comm);
if (p->p_flag & P_SYSTEM)
db_printf("]");
db_printf("\n");
}
DB_SHOW_COMMAND(thread, db_show_thread)
{
struct thread *td;
struct lock_object *lock;
bool comma;
int delta;
/* Determine which thread to examine. */
if (have_addr)
td = db_lookup_thread(addr, false);
else
td = kdb_thread;
lock = (struct lock_object *)td->td_lock;
db_printf("Thread %d at %p:\n", td->td_tid, td);
db_printf(" proc (pid %d): %p\n", td->td_proc->p_pid, td->td_proc);
if (td->td_name[0] != '\0')
db_printf(" name: %s\n", td->td_name);
db_printf(" stack: %p-%p\n", (void *)td->td_kstack,
(void *)(td->td_kstack + td->td_kstack_pages * PAGE_SIZE - 1));
db_printf(" flags: %#x ", td->td_flags);
db_printf(" pflags: %#x\n", td->td_pflags);
db_printf(" state: ");
switch (td->td_state) {
case TDS_INACTIVE:
db_printf("INACTIVE\n");
break;
case TDS_CAN_RUN:
db_printf("CAN RUN\n");
break;
case TDS_RUNQ:
db_printf("RUNQ\n");
break;
case TDS_RUNNING:
db_printf("RUNNING (CPU %d)\n", td->td_oncpu);
break;
case TDS_INHIBITED:
db_printf("INHIBITED: {");
comma = false;
if (TD_IS_SLEEPING(td)) {
db_printf("SLEEPING");
comma = true;
}
if (TD_IS_SUSPENDED(td)) {
if (comma)
db_printf(", ");
db_printf("SUSPENDED");
comma = true;
}
if (TD_IS_SWAPPED(td)) {
if (comma)
db_printf(", ");
db_printf("SWAPPED");
comma = true;
}
if (TD_ON_LOCK(td)) {
if (comma)
db_printf(", ");
db_printf("LOCK");
comma = true;
}
if (TD_AWAITING_INTR(td)) {
if (comma)
db_printf(", ");
db_printf("IWAIT");
}
db_printf("}\n");
break;
default:
db_printf("??? (%#x)\n", td->td_state);
break;
}
if (TD_ON_LOCK(td))
db_printf(" lock: %s turnstile: %p\n", td->td_lockname,
td->td_blocked);
if (TD_ON_SLEEPQ(td))
db_printf(
" wmesg: %s wchan: %p sleeptimo %lx. %jx (curr %lx. %jx)\n",
td->td_wmesg, td->td_wchan,
(long)sbttobt(td->td_sleeptimo).sec,
(uintmax_t)sbttobt(td->td_sleeptimo).frac,
(long)sbttobt(sbinuptime()).sec,
(uintmax_t)sbttobt(sbinuptime()).frac);
db_printf(" priority: %d\n", td->td_priority);
db_printf(" container lock: %s (%p)\n", lock->lo_name, lock);
if (td->td_swvoltick != 0) {
delta = (u_int)ticks - (u_int)td->td_swvoltick;
db_printf(" last voluntary switch: %d ms ago\n",
1000 * delta / hz);
}
if (td->td_swinvoltick != 0) {
delta = (u_int)ticks - (u_int)td->td_swinvoltick;
db_printf(" last involuntary switch: %d ms ago\n",
1000 * delta / hz);
}
}
DB_SHOW_COMMAND(proc, db_show_proc)
{
struct thread *td;
struct proc *p;
int i;
/* Determine which process to examine. */
if (have_addr)
p = db_lookup_proc(addr);
else
p = kdb_thread->td_proc;
db_printf("Process %d (%s) at %p:\n", p->p_pid, p->p_comm, p);
db_printf(" state: ");
switch (p->p_state) {
case PRS_NEW:
db_printf("NEW\n");
break;
case PRS_NORMAL:
db_printf("NORMAL\n");
break;
case PRS_ZOMBIE:
db_printf("ZOMBIE\n");
break;
default:
db_printf("??? (%#x)\n", p->p_state);
}
if (p->p_ucred != NULL) {
db_printf(" uid: %d gids: ", p->p_ucred->cr_uid);
for (i = 0; i < p->p_ucred->cr_ngroups; i++) {
db_printf("%d", p->p_ucred->cr_groups[i]);
if (i < (p->p_ucred->cr_ngroups - 1))
db_printf(", ");
}
db_printf("\n");
}
if (p->p_pptr != NULL)
db_printf(" parent: pid %d at %p\n", p->p_pptr->p_pid,
p->p_pptr);
if (p->p_leader != NULL && p->p_leader != p)
db_printf(" leader: pid %d at %p\n", p->p_leader->p_pid,
p->p_leader);
if (p->p_sysent != NULL)
db_printf(" ABI: %s\n", p->p_sysent->sv_name);
if (p->p_args != NULL) {
db_printf(" arguments: ");
for (i = 0; i < (int)p->p_args->ar_length; i++) {
if (p->p_args->ar_args[i] == '\0')
db_printf(" ");
else
db_printf("%c", p->p_args->ar_args[i]);
}
db_printf("\n");
}
db_printf(" threads: %d\n", p->p_numthreads);
FOREACH_THREAD_IN_PROC(p, td) {
dumpthread(p, td, 1);
if (db_pager_quit)
break;
}
}
void
db_findstack_cmd(db_expr_t addr, bool have_addr, db_expr_t dummy3 __unused,
char *dummy4 __unused)
{
struct proc *p;
struct thread *td;
struct kstack_cache_entry *ks_ce;
vm_offset_t saddr;
if (have_addr)
saddr = addr;
else {
db_printf("Usage: findstack <address>\n");
return;
}
FOREACH_PROC_IN_SYSTEM(p) {
FOREACH_THREAD_IN_PROC(p, td) {
if (td->td_kstack <= saddr && saddr < td->td_kstack +
PAGE_SIZE * td->td_kstack_pages) {
db_printf("Thread %p\n", td);
return;
}
}
}
for (ks_ce = kstack_cache; ks_ce != NULL;
ks_ce = ks_ce->next_ks_entry) {
if ((vm_offset_t)ks_ce <= saddr && saddr < (vm_offset_t)ks_ce +
PAGE_SIZE * kstack_pages) {
db_printf("Cached stack %p\n", ks_ce);
return;
}
}
}
Reference in New Issue View Git Blame Copy Permalink