edc8222303
initial thread stack is not adjusted by the tunable, the stack is allocated too early to get access to the kernel environment. See TD0_KSTACK_PAGES for the thread0 stack sizing on i386. The tunable was tested on x86 only. From the visual inspection, it seems that it might work on arm and powerpc. The arm USPACE_SVC_STACK_TOP and powerpc USPACE macros seems to be already incorrect for the threads with non-default kstack size. I only changed the macros to use variable instead of constant, since I cannot test. On arm64, mips and sparc64, some static data structures are sized by KSTACK_PAGES, so the tunable is disabled. Sponsored by: The FreeBSD Foundation MFC after: 2 week
471 lines
12 KiB
C
471 lines
12 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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* 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_kstack_pages.h"
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#include <sys/param.h>
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#include <sys/cons.h>
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#include <sys/jail.h>
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#include <sys/kdb.h>
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#include <sys/proc.h>
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#include <sys/sysent.h>
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#include <sys/systm.h>
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#include <sys/_kstack_cache.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 dumpthread(volatile struct proc *p, volatile struct thread *td,
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int all);
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/*
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* At least one non-optional show-command must be implemented using
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* DB_SHOW_ALL_COMMAND() so that db_show_all_cmd_set gets created.
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* Here is one.
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*/
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DB_SHOW_ALL_COMMAND(procs, db_procs_cmd)
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{
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db_ps(addr, have_addr, count, modif);
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}
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/*
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* Layout:
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* - column counts
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* - header
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* - single-threaded process
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* - multi-threaded process
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* - thread in a MT process
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*
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* 1 2 3 4 5 6 7
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* 1234567890123456789012345678901234567890123456789012345678901234567890
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* pid ppid pgrp uid state wmesg wchan cmd
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* <pid> <ppi> <pgi> <uid> <stat> < wmesg > < wchan > <name>
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* <pid> <ppi> <pgi> <uid> <stat> (threaded) <command>
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* <tid > <stat> < wmesg > < wchan > <name>
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*
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* For machines with 64-bit pointers, we expand the wchan field 8 more
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* characters.
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*/
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void
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db_ps(db_expr_t addr, bool hasaddr, db_expr_t count, char *modif)
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{
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volatile struct proc *p, *pp;
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volatile struct thread *td;
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struct ucred *cred;
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struct pgrp *pgrp;
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char state[9];
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int np, rflag, sflag, dflag, lflag, wflag;
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np = nprocs;
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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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#ifdef __LP64__
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db_printf(" pid ppid pgrp uid state wmesg wchan cmd\n");
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#else
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db_printf(" pid ppid pgrp uid state wmesg wchan cmd\n");
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#endif
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while (--np >= 0 && !db_pager_quit) {
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if (p == NULL) {
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db_printf("oops, ran out of processes early!\n");
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break;
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}
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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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cred = p->p_ucred;
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pgrp = p->p_pgrp;
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db_printf("%5d %5d %5d %5d ", p->p_pid, pp->p_pid,
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pgrp != NULL ? pgrp->pg_id : 0,
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cred != NULL ? cred->cr_ruid : 0);
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/* Determine our primary process state. */
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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[0] = 'T';
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else {
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/*
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* One of D, L, R, S, W. For a
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* multithreaded process we will use
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* the state of the thread with the
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* highest precedence. The
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* precendence order from high to low
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* is R, L, D, S, W. If no thread is
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* in a sane state we use '?' for our
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* primary state.
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*/
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rflag = sflag = dflag = lflag = wflag = 0;
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FOREACH_THREAD_IN_PROC(p, td) {
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if (td->td_state == TDS_RUNNING ||
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td->td_state == TDS_RUNQ ||
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td->td_state == TDS_CAN_RUN)
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rflag++;
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if (TD_ON_LOCK(td))
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lflag++;
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if (TD_IS_SLEEPING(td)) {
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if (!(td->td_flags & TDF_SINTR))
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dflag++;
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else
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sflag++;
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}
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if (TD_AWAITING_INTR(td))
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wflag++;
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}
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if (rflag)
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state[0] = 'R';
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else if (lflag)
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state[0] = 'L';
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else if (dflag)
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state[0] = 'D';
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else if (sflag)
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state[0] = 'S';
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else if (wflag)
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state[0] = 'W';
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else
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state[0] = '?';
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}
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break;
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case PRS_NEW:
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state[0] = 'N';
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break;
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case PRS_ZOMBIE:
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state[0] = 'Z';
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break;
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default:
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state[0] = 'U';
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break;
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}
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state[1] = '\0';
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/* Additional process state flags. */
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if (!(p->p_flag & P_INMEM))
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strlcat(state, "W", sizeof(state));
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if (p->p_flag & P_TRACED)
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strlcat(state, "X", sizeof(state));
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if (p->p_flag & P_WEXIT && p->p_state != PRS_ZOMBIE)
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strlcat(state, "E", sizeof(state));
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if (p->p_flag & P_PPWAIT)
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strlcat(state, "V", sizeof(state));
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if (p->p_flag & P_SYSTEM || p->p_lock > 0)
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strlcat(state, "L", sizeof(state));
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if (p->p_session != NULL && SESS_LEADER(p))
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strlcat(state, "s", sizeof(state));
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/* Cheated here and didn't compare pgid's. */
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if (p->p_flag & P_CONTROLT)
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strlcat(state, "+", sizeof(state));
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if (cred != NULL && jailed(cred))
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strlcat(state, "J", sizeof(state));
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db_printf(" %-6.6s ", state);
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if (p->p_flag & P_HADTHREADS) {
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#ifdef __LP64__
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db_printf(" (threaded) ");
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#else
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db_printf(" (threaded) ");
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#endif
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if (p->p_flag & P_SYSTEM)
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db_printf("[");
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db_printf("%s", p->p_comm);
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if (p->p_flag & P_SYSTEM)
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db_printf("]");
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db_printf("\n");
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}
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FOREACH_THREAD_IN_PROC(p, td) {
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dumpthread(p, td, p->p_flag & P_HADTHREADS);
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if (db_pager_quit)
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break;
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}
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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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}
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static void
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dumpthread(volatile struct proc *p, volatile struct thread *td, int all)
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{
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char state[9], wprefix;
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const char *wmesg;
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void *wchan;
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if (all) {
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db_printf("%6d ", td->td_tid);
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switch (td->td_state) {
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case TDS_RUNNING:
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snprintf(state, sizeof(state), "Run");
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break;
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case TDS_RUNQ:
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snprintf(state, sizeof(state), "RunQ");
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break;
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case TDS_CAN_RUN:
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snprintf(state, sizeof(state), "CanRun");
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break;
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case TDS_INACTIVE:
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snprintf(state, sizeof(state), "Inactv");
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break;
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case TDS_INHIBITED:
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state[0] = '\0';
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if (TD_ON_LOCK(td))
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strlcat(state, "L", sizeof(state));
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if (TD_IS_SLEEPING(td)) {
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if (td->td_flags & TDF_SINTR)
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strlcat(state, "S", sizeof(state));
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else
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strlcat(state, "D", sizeof(state));
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}
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if (TD_IS_SWAPPED(td))
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strlcat(state, "W", sizeof(state));
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if (TD_AWAITING_INTR(td))
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strlcat(state, "I", sizeof(state));
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if (TD_IS_SUSPENDED(td))
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strlcat(state, "s", sizeof(state));
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if (state[0] != '\0')
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break;
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default:
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snprintf(state, sizeof(state), "???");
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}
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db_printf(" %-6.6s ", state);
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}
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wprefix = ' ';
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if (TD_ON_LOCK(td)) {
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wprefix = '*';
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wmesg = td->td_lockname;
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wchan = td->td_blocked;
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} else if (TD_ON_SLEEPQ(td)) {
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wmesg = td->td_wmesg;
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wchan = td->td_wchan;
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} else if (TD_IS_RUNNING(td)) {
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snprintf(state, sizeof(state), "CPU %d", td->td_oncpu);
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wmesg = state;
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wchan = NULL;
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} else {
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wmesg = "";
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wchan = NULL;
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}
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db_printf("%c%-8.8s ", wprefix, wmesg);
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if (wchan == NULL)
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#ifdef __LP64__
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db_printf("%18s ", "");
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#else
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db_printf("%10s ", "");
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#endif
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else
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db_printf("%p ", wchan);
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if (p->p_flag & P_SYSTEM)
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db_printf("[");
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if (td->td_name[0] != '\0')
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db_printf("%s", td->td_name);
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else
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db_printf("%s", td->td_proc->p_comm);
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if (p->p_flag & P_SYSTEM)
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db_printf("]");
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db_printf("\n");
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}
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DB_SHOW_COMMAND(thread, db_show_thread)
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{
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struct thread *td;
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struct lock_object *lock;
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bool comma;
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/* Determine which thread to examine. */
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if (have_addr)
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td = db_lookup_thread(addr, false);
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else
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td = kdb_thread;
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lock = (struct lock_object *)td->td_lock;
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db_printf("Thread %d at %p:\n", td->td_tid, td);
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db_printf(" proc (pid %d): %p\n", td->td_proc->p_pid, td->td_proc);
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if (td->td_name[0] != '\0')
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db_printf(" name: %s\n", td->td_name);
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db_printf(" stack: %p-%p\n", (void *)td->td_kstack,
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(void *)(td->td_kstack + td->td_kstack_pages * PAGE_SIZE - 1));
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db_printf(" flags: %#x ", td->td_flags);
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db_printf(" pflags: %#x\n", td->td_pflags);
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db_printf(" state: ");
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switch (td->td_state) {
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case TDS_INACTIVE:
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db_printf("INACTIVE\n");
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break;
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case TDS_CAN_RUN:
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db_printf("CAN RUN\n");
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break;
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case TDS_RUNQ:
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db_printf("RUNQ\n");
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break;
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case TDS_RUNNING:
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db_printf("RUNNING (CPU %d)\n", td->td_oncpu);
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break;
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case TDS_INHIBITED:
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db_printf("INHIBITED: {");
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comma = false;
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if (TD_IS_SLEEPING(td)) {
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db_printf("SLEEPING");
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comma = true;
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}
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if (TD_IS_SUSPENDED(td)) {
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if (comma)
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db_printf(", ");
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db_printf("SUSPENDED");
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comma = true;
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}
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if (TD_IS_SWAPPED(td)) {
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if (comma)
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db_printf(", ");
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db_printf("SWAPPED");
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comma = true;
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}
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if (TD_ON_LOCK(td)) {
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if (comma)
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db_printf(", ");
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db_printf("LOCK");
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comma = true;
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}
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if (TD_AWAITING_INTR(td)) {
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if (comma)
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db_printf(", ");
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db_printf("IWAIT");
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}
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db_printf("}\n");
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break;
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default:
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db_printf("??? (%#x)\n", td->td_state);
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break;
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}
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if (TD_ON_LOCK(td))
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db_printf(" lock: %s turnstile: %p\n", td->td_lockname,
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td->td_blocked);
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if (TD_ON_SLEEPQ(td))
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db_printf(" wmesg: %s wchan: %p\n", td->td_wmesg,
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td->td_wchan);
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db_printf(" priority: %d\n", td->td_priority);
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db_printf(" container lock: %s (%p)\n", lock->lo_name, lock);
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}
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DB_SHOW_COMMAND(proc, db_show_proc)
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{
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struct thread *td;
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struct proc *p;
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int i;
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/* Determine which process to examine. */
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if (have_addr)
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p = db_lookup_proc(addr);
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else
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p = kdb_thread->td_proc;
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db_printf("Process %d (%s) at %p:\n", p->p_pid, p->p_comm, p);
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db_printf(" state: ");
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switch (p->p_state) {
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case PRS_NEW:
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db_printf("NEW\n");
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break;
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case PRS_NORMAL:
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db_printf("NORMAL\n");
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break;
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case PRS_ZOMBIE:
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db_printf("ZOMBIE\n");
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break;
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default:
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db_printf("??? (%#x)\n", p->p_state);
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}
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if (p->p_ucred != NULL) {
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db_printf(" uid: %d gids: ", p->p_ucred->cr_uid);
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for (i = 0; i < p->p_ucred->cr_ngroups; i++) {
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db_printf("%d", p->p_ucred->cr_groups[i]);
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if (i < (p->p_ucred->cr_ngroups - 1))
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db_printf(", ");
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}
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db_printf("\n");
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}
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if (p->p_pptr != NULL)
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db_printf(" parent: pid %d at %p\n", p->p_pptr->p_pid,
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p->p_pptr);
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if (p->p_leader != NULL && p->p_leader != p)
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db_printf(" leader: pid %d at %p\n", p->p_leader->p_pid,
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p->p_leader);
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if (p->p_sysent != NULL)
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db_printf(" ABI: %s\n", p->p_sysent->sv_name);
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if (p->p_args != NULL)
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db_printf(" arguments: %.*s\n", (int)p->p_args->ar_length,
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p->p_args->ar_args);
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db_printf(" threads: %d\n", p->p_numthreads);
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FOREACH_THREAD_IN_PROC(p, td) {
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dumpthread(p, td, 1);
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if (db_pager_quit)
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break;
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}
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}
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void
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db_findstack_cmd(db_expr_t addr, bool have_addr, db_expr_t dummy3 __unused,
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char *dummy4 __unused)
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{
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struct proc *p;
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struct thread *td;
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struct kstack_cache_entry *ks_ce;
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vm_offset_t saddr;
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if (have_addr)
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saddr = addr;
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else {
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db_printf("Usage: findstack <address>\n");
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return;
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}
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FOREACH_PROC_IN_SYSTEM(p) {
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FOREACH_THREAD_IN_PROC(p, td) {
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if (td->td_kstack <= saddr && saddr < td->td_kstack +
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PAGE_SIZE * td->td_kstack_pages) {
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db_printf("Thread %p\n", td);
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return;
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}
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}
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}
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for (ks_ce = kstack_cache; ks_ce != NULL;
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ks_ce = ks_ce->next_ks_entry) {
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if ((vm_offset_t)ks_ce <= saddr && saddr < (vm_offset_t)ks_ce +
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PAGE_SIZE * kstack_pages) {
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db_printf("Cached stack %p\n", ks_ce);
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return;
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}
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}
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}
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