1eecfae3e5
bfd sources understand the present format.
1265 lines
30 KiB
C
1265 lines
30 KiB
C
/*
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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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* 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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* @(#)kern_proc.c 8.7 (Berkeley) 2/14/95
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* $FreeBSD$
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_ktrace.h"
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#include "opt_kstack_pages.h"
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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/lock.h>
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#include <sys/malloc.h>
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#include <sys/mutex.h>
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#include <sys/proc.h>
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#include <sys/sysent.h>
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#include <sys/sched.h>
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#include <sys/smp.h>
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#include <sys/sysctl.h>
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#include <sys/filedesc.h>
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#include <sys/tty.h>
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#include <sys/signalvar.h>
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#include <sys/sx.h>
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#include <sys/user.h>
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#include <sys/jail.h>
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#ifdef KTRACE
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#include <sys/uio.h>
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#include <sys/ktrace.h>
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#endif
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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#include <vm/pmap.h>
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#include <vm/vm_map.h>
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#include <vm/uma.h>
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#include <machine/critical.h>
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MALLOC_DEFINE(M_PGRP, "pgrp", "process group header");
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MALLOC_DEFINE(M_SESSION, "session", "session header");
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static MALLOC_DEFINE(M_PROC, "proc", "Proc structures");
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MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures");
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static void doenterpgrp(struct proc *, struct pgrp *);
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static void orphanpg(struct pgrp *pg);
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static void pgadjustjobc(struct pgrp *pgrp, int entering);
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static void pgdelete(struct pgrp *);
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static int proc_ctor(void *mem, int size, void *arg, int flags);
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static void proc_dtor(void *mem, int size, void *arg);
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static int proc_init(void *mem, int size, int flags);
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static void proc_fini(void *mem, int size);
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/*
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* Other process lists
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*/
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struct pidhashhead *pidhashtbl;
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u_long pidhash;
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struct pgrphashhead *pgrphashtbl;
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u_long pgrphash;
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struct proclist allproc;
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struct proclist zombproc;
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struct sx allproc_lock;
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struct sx proctree_lock;
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struct mtx pargs_ref_lock;
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struct mtx ppeers_lock;
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uma_zone_t proc_zone;
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uma_zone_t ithread_zone;
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int kstack_pages = KSTACK_PAGES;
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SYSCTL_INT(_kern, OID_AUTO, kstack_pages, CTLFLAG_RD, &kstack_pages, 0, "");
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CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE);
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/*
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* Initialize global process hashing structures.
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*/
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void
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procinit()
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{
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sx_init(&allproc_lock, "allproc");
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sx_init(&proctree_lock, "proctree");
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mtx_init(&pargs_ref_lock, "struct pargs.ref", NULL, MTX_DEF);
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mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF);
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LIST_INIT(&allproc);
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LIST_INIT(&zombproc);
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pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash);
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pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash);
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proc_zone = uma_zcreate("PROC", sched_sizeof_proc(),
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proc_ctor, proc_dtor, proc_init, proc_fini,
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UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
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uihashinit();
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}
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/*
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* Prepare a proc for use.
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*/
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static int
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proc_ctor(void *mem, int size, void *arg, int flags)
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{
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struct proc *p;
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p = (struct proc *)mem;
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return (0);
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}
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/*
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* Reclaim a proc after use.
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*/
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static void
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proc_dtor(void *mem, int size, void *arg)
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{
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struct proc *p;
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struct thread *td;
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#ifdef INVARIANTS
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struct ksegrp *kg;
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#endif
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/* INVARIANTS checks go here */
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p = (struct proc *)mem;
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td = FIRST_THREAD_IN_PROC(p);
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#ifdef INVARIANTS
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KASSERT((p->p_numthreads == 1),
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("bad number of threads in exiting process"));
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KASSERT((p->p_numksegrps == 1), ("free proc with > 1 ksegrp"));
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KASSERT((td != NULL), ("proc_dtor: bad thread pointer"));
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kg = FIRST_KSEGRP_IN_PROC(p);
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KASSERT((kg != NULL), ("proc_dtor: bad kg pointer"));
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#endif
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/* Dispose of an alternate kstack, if it exists.
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* XXX What if there are more than one thread in the proc?
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* The first thread in the proc is special and not
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* freed, so you gotta do this here.
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*/
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if (((p->p_flag & P_KTHREAD) != 0) && (td->td_altkstack != 0))
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vm_thread_dispose_altkstack(td);
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}
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/*
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* Initialize type-stable parts of a proc (when newly created).
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*/
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static int
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proc_init(void *mem, int size, int flags)
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{
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struct proc *p;
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struct thread *td;
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struct ksegrp *kg;
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p = (struct proc *)mem;
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p->p_sched = (struct p_sched *)&p[1];
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td = thread_alloc();
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kg = ksegrp_alloc();
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bzero(&p->p_mtx, sizeof(struct mtx));
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mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK);
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p->p_stats = pstats_alloc();
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proc_linkup(p, kg, td);
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sched_newproc(p, kg, td);
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return (0);
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}
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/*
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* UMA should ensure that this function is never called.
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* Freeing a proc structure would violate type stability.
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*/
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static void
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proc_fini(void *mem, int size)
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{
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panic("proc reclaimed");
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}
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/*
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* Is p an inferior of the current process?
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*/
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int
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inferior(p)
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register struct proc *p;
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{
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sx_assert(&proctree_lock, SX_LOCKED);
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for (; p != curproc; p = p->p_pptr)
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if (p->p_pid == 0)
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return (0);
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return (1);
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}
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/*
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* Locate a process by number; return only "live" processes -- i.e., neither
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* zombies nor newly born but incompletely initialized processes. By not
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* returning processes in the PRS_NEW state, we allow callers to avoid
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* testing for that condition to avoid dereferencing p_ucred, et al.
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*/
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struct proc *
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pfind(pid)
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register pid_t pid;
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{
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register struct proc *p;
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sx_slock(&allproc_lock);
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LIST_FOREACH(p, PIDHASH(pid), p_hash)
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if (p->p_pid == pid) {
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if (p->p_state == PRS_NEW) {
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p = NULL;
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break;
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}
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PROC_LOCK(p);
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break;
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}
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sx_sunlock(&allproc_lock);
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return (p);
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}
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/*
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* Locate a process group by number.
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* The caller must hold proctree_lock.
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*/
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struct pgrp *
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pgfind(pgid)
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register pid_t pgid;
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{
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register struct pgrp *pgrp;
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sx_assert(&proctree_lock, SX_LOCKED);
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LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
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if (pgrp->pg_id == pgid) {
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PGRP_LOCK(pgrp);
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return (pgrp);
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}
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}
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return (NULL);
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}
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/*
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* Create a new process group.
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* pgid must be equal to the pid of p.
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* Begin a new session if required.
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*/
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int
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enterpgrp(p, pgid, pgrp, sess)
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register struct proc *p;
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pid_t pgid;
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struct pgrp *pgrp;
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struct session *sess;
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{
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struct pgrp *pgrp2;
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sx_assert(&proctree_lock, SX_XLOCKED);
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KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL"));
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KASSERT(p->p_pid == pgid,
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("enterpgrp: new pgrp and pid != pgid"));
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pgrp2 = pgfind(pgid);
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KASSERT(pgrp2 == NULL,
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("enterpgrp: pgrp with pgid exists"));
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KASSERT(!SESS_LEADER(p),
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("enterpgrp: session leader attempted setpgrp"));
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mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
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if (sess != NULL) {
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/*
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* new session
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*/
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mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF);
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PROC_LOCK(p);
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p->p_flag &= ~P_CONTROLT;
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PROC_UNLOCK(p);
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PGRP_LOCK(pgrp);
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sess->s_leader = p;
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sess->s_sid = p->p_pid;
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sess->s_count = 1;
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sess->s_ttyvp = NULL;
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sess->s_ttyp = NULL;
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bcopy(p->p_session->s_login, sess->s_login,
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sizeof(sess->s_login));
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pgrp->pg_session = sess;
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KASSERT(p == curproc,
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("enterpgrp: mksession and p != curproc"));
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} else {
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pgrp->pg_session = p->p_session;
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SESS_LOCK(pgrp->pg_session);
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pgrp->pg_session->s_count++;
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SESS_UNLOCK(pgrp->pg_session);
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PGRP_LOCK(pgrp);
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}
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pgrp->pg_id = pgid;
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LIST_INIT(&pgrp->pg_members);
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/*
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* As we have an exclusive lock of proctree_lock,
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* this should not deadlock.
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*/
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LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
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pgrp->pg_jobc = 0;
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SLIST_INIT(&pgrp->pg_sigiolst);
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PGRP_UNLOCK(pgrp);
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doenterpgrp(p, pgrp);
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return (0);
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}
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/*
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* Move p to an existing process group
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*/
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int
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enterthispgrp(p, pgrp)
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register struct proc *p;
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struct pgrp *pgrp;
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{
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sx_assert(&proctree_lock, SX_XLOCKED);
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PROC_LOCK_ASSERT(p, MA_NOTOWNED);
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PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
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PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
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SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
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KASSERT(pgrp->pg_session == p->p_session,
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("%s: pgrp's session %p, p->p_session %p.\n",
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__func__,
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pgrp->pg_session,
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p->p_session));
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KASSERT(pgrp != p->p_pgrp,
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("%s: p belongs to pgrp.", __func__));
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doenterpgrp(p, pgrp);
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return (0);
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}
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/*
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* Move p to a process group
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*/
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static void
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doenterpgrp(p, pgrp)
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struct proc *p;
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struct pgrp *pgrp;
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{
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struct pgrp *savepgrp;
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sx_assert(&proctree_lock, SX_XLOCKED);
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PROC_LOCK_ASSERT(p, MA_NOTOWNED);
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PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
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PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
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SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
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savepgrp = p->p_pgrp;
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/*
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* Adjust eligibility of affected pgrps to participate in job control.
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* Increment eligibility counts before decrementing, otherwise we
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* could reach 0 spuriously during the first call.
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*/
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fixjobc(p, pgrp, 1);
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fixjobc(p, p->p_pgrp, 0);
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PGRP_LOCK(pgrp);
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PGRP_LOCK(savepgrp);
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PROC_LOCK(p);
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LIST_REMOVE(p, p_pglist);
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p->p_pgrp = pgrp;
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PROC_UNLOCK(p);
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LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
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PGRP_UNLOCK(savepgrp);
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PGRP_UNLOCK(pgrp);
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if (LIST_EMPTY(&savepgrp->pg_members))
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pgdelete(savepgrp);
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}
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/*
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* remove process from process group
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*/
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int
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leavepgrp(p)
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register struct proc *p;
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{
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struct pgrp *savepgrp;
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sx_assert(&proctree_lock, SX_XLOCKED);
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savepgrp = p->p_pgrp;
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PGRP_LOCK(savepgrp);
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PROC_LOCK(p);
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LIST_REMOVE(p, p_pglist);
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p->p_pgrp = NULL;
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PROC_UNLOCK(p);
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PGRP_UNLOCK(savepgrp);
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if (LIST_EMPTY(&savepgrp->pg_members))
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pgdelete(savepgrp);
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return (0);
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}
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/*
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* delete a process group
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*/
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static void
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pgdelete(pgrp)
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register struct pgrp *pgrp;
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{
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struct session *savesess;
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int i;
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sx_assert(&proctree_lock, SX_XLOCKED);
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PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
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SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
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/*
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* Reset any sigio structures pointing to us as a result of
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* F_SETOWN with our pgid.
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*/
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funsetownlst(&pgrp->pg_sigiolst);
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PGRP_LOCK(pgrp);
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if (pgrp->pg_session->s_ttyp != NULL &&
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pgrp->pg_session->s_ttyp->t_pgrp == pgrp)
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pgrp->pg_session->s_ttyp->t_pgrp = NULL;
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LIST_REMOVE(pgrp, pg_hash);
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savesess = pgrp->pg_session;
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SESS_LOCK(savesess);
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i = --savesess->s_count;
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SESS_UNLOCK(savesess);
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PGRP_UNLOCK(pgrp);
|
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if (i == 0) {
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if (savesess->s_ttyp != NULL)
|
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ttyrel(savesess->s_ttyp);
|
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mtx_destroy(&savesess->s_mtx);
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FREE(savesess, M_SESSION);
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}
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mtx_destroy(&pgrp->pg_mtx);
|
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FREE(pgrp, M_PGRP);
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}
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|
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static void
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pgadjustjobc(pgrp, entering)
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struct pgrp *pgrp;
|
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int entering;
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{
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|
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PGRP_LOCK(pgrp);
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if (entering)
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pgrp->pg_jobc++;
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else {
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--pgrp->pg_jobc;
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if (pgrp->pg_jobc == 0)
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orphanpg(pgrp);
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}
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PGRP_UNLOCK(pgrp);
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}
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|
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/*
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* Adjust pgrp jobc counters when specified process changes process group.
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* We count the number of processes in each process group that "qualify"
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* the group for terminal job control (those with a parent in a different
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* process group of the same session). If that count reaches zero, the
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* process group becomes orphaned. Check both the specified process'
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* process group and that of its children.
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* entering == 0 => p is leaving specified group.
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* entering == 1 => p is entering specified group.
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*/
|
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void
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fixjobc(p, pgrp, entering)
|
|
register struct proc *p;
|
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register struct pgrp *pgrp;
|
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int entering;
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{
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register struct pgrp *hispgrp;
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register struct session *mysession;
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|
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sx_assert(&proctree_lock, SX_LOCKED);
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PROC_LOCK_ASSERT(p, MA_NOTOWNED);
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PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
|
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SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
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|
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/*
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|
* Check p's parent to see whether p qualifies its own process
|
|
* group; if so, adjust count for p's process group.
|
|
*/
|
|
mysession = pgrp->pg_session;
|
|
if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
|
|
hispgrp->pg_session == mysession)
|
|
pgadjustjobc(pgrp, entering);
|
|
|
|
/*
|
|
* Check this process' children to see whether they qualify
|
|
* their process groups; if so, adjust counts for children's
|
|
* process groups.
|
|
*/
|
|
LIST_FOREACH(p, &p->p_children, p_sibling) {
|
|
hispgrp = p->p_pgrp;
|
|
if (hispgrp == pgrp ||
|
|
hispgrp->pg_session != mysession)
|
|
continue;
|
|
PROC_LOCK(p);
|
|
if (p->p_state == PRS_ZOMBIE) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
PROC_UNLOCK(p);
|
|
pgadjustjobc(hispgrp, entering);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* A process group has become orphaned;
|
|
* if there are any stopped processes in the group,
|
|
* hang-up all process in that group.
|
|
*/
|
|
static void
|
|
orphanpg(pg)
|
|
struct pgrp *pg;
|
|
{
|
|
register struct proc *p;
|
|
|
|
PGRP_LOCK_ASSERT(pg, MA_OWNED);
|
|
|
|
LIST_FOREACH(p, &pg->pg_members, p_pglist) {
|
|
PROC_LOCK(p);
|
|
if (P_SHOULDSTOP(p)) {
|
|
PROC_UNLOCK(p);
|
|
LIST_FOREACH(p, &pg->pg_members, p_pglist) {
|
|
PROC_LOCK(p);
|
|
psignal(p, SIGHUP);
|
|
psignal(p, SIGCONT);
|
|
PROC_UNLOCK(p);
|
|
}
|
|
return;
|
|
}
|
|
PROC_UNLOCK(p);
|
|
}
|
|
}
|
|
|
|
#include "opt_ddb.h"
|
|
#ifdef DDB
|
|
#include <ddb/ddb.h>
|
|
|
|
DB_SHOW_COMMAND(pgrpdump, pgrpdump)
|
|
{
|
|
register struct pgrp *pgrp;
|
|
register struct proc *p;
|
|
register int i;
|
|
|
|
for (i = 0; i <= pgrphash; i++) {
|
|
if (!LIST_EMPTY(&pgrphashtbl[i])) {
|
|
printf("\tindx %d\n", i);
|
|
LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) {
|
|
printf(
|
|
"\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
|
|
(void *)pgrp, (long)pgrp->pg_id,
|
|
(void *)pgrp->pg_session,
|
|
pgrp->pg_session->s_count,
|
|
(void *)LIST_FIRST(&pgrp->pg_members));
|
|
LIST_FOREACH(p, &pgrp->pg_members, p_pglist) {
|
|
printf("\t\tpid %ld addr %p pgrp %p\n",
|
|
(long)p->p_pid, (void *)p,
|
|
(void *)p->p_pgrp);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
#endif /* DDB */
|
|
void
|
|
fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp);
|
|
|
|
/*
|
|
* Fill in a kinfo_proc structure for the specified process.
|
|
* Must be called with the target process locked.
|
|
*/
|
|
void
|
|
fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
|
|
{
|
|
fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp);
|
|
}
|
|
|
|
void
|
|
fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp)
|
|
{
|
|
struct proc *p;
|
|
struct thread *td0;
|
|
struct ksegrp *kg;
|
|
struct tty *tp;
|
|
struct session *sp;
|
|
struct timeval tv;
|
|
struct sigacts *ps;
|
|
|
|
p = td->td_proc;
|
|
|
|
bzero(kp, sizeof(*kp));
|
|
|
|
kp->ki_structsize = sizeof(*kp);
|
|
kp->ki_paddr = p;
|
|
PROC_LOCK_ASSERT(p, MA_OWNED);
|
|
kp->ki_addr =/* p->p_addr; */0; /* XXXKSE */
|
|
kp->ki_args = p->p_args;
|
|
kp->ki_textvp = p->p_textvp;
|
|
#ifdef KTRACE
|
|
kp->ki_tracep = p->p_tracevp;
|
|
mtx_lock(&ktrace_mtx);
|
|
kp->ki_traceflag = p->p_traceflag;
|
|
mtx_unlock(&ktrace_mtx);
|
|
#endif
|
|
kp->ki_fd = p->p_fd;
|
|
kp->ki_vmspace = p->p_vmspace;
|
|
if (p->p_ucred) {
|
|
kp->ki_uid = p->p_ucred->cr_uid;
|
|
kp->ki_ruid = p->p_ucred->cr_ruid;
|
|
kp->ki_svuid = p->p_ucred->cr_svuid;
|
|
/* XXX bde doesn't like KI_NGROUPS */
|
|
kp->ki_ngroups = min(p->p_ucred->cr_ngroups, KI_NGROUPS);
|
|
bcopy(p->p_ucred->cr_groups, kp->ki_groups,
|
|
kp->ki_ngroups * sizeof(gid_t));
|
|
kp->ki_rgid = p->p_ucred->cr_rgid;
|
|
kp->ki_svgid = p->p_ucred->cr_svgid;
|
|
}
|
|
if (p->p_sigacts) {
|
|
ps = p->p_sigacts;
|
|
mtx_lock(&ps->ps_mtx);
|
|
kp->ki_sigignore = ps->ps_sigignore;
|
|
kp->ki_sigcatch = ps->ps_sigcatch;
|
|
mtx_unlock(&ps->ps_mtx);
|
|
}
|
|
mtx_lock_spin(&sched_lock);
|
|
if (p->p_state != PRS_NEW &&
|
|
p->p_state != PRS_ZOMBIE &&
|
|
p->p_vmspace != NULL) {
|
|
struct vmspace *vm = p->p_vmspace;
|
|
|
|
kp->ki_size = vm->vm_map.size;
|
|
kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/
|
|
FOREACH_THREAD_IN_PROC(p, td0) {
|
|
if (!TD_IS_SWAPPED(td0))
|
|
kp->ki_rssize += td0->td_kstack_pages;
|
|
if (td0->td_altkstack_obj != NULL)
|
|
kp->ki_rssize += td0->td_altkstack_pages;
|
|
}
|
|
kp->ki_swrss = vm->vm_swrss;
|
|
kp->ki_tsize = vm->vm_tsize;
|
|
kp->ki_dsize = vm->vm_dsize;
|
|
kp->ki_ssize = vm->vm_ssize;
|
|
}
|
|
kp->ki_sflag = p->p_sflag;
|
|
kp->ki_swtime = p->p_swtime;
|
|
kp->ki_pid = p->p_pid;
|
|
kp->ki_nice = p->p_nice;
|
|
bintime2timeval(&p->p_rux.rux_runtime, &tv);
|
|
kp->ki_runtime = tv.tv_sec * (u_int64_t)1000000 + tv.tv_usec;
|
|
if (p->p_state != PRS_ZOMBIE) {
|
|
#if 0
|
|
if (td == NULL) {
|
|
/* XXXKSE: This should never happen. */
|
|
printf("fill_kinfo_proc(): pid %d has no threads!\n",
|
|
p->p_pid);
|
|
mtx_unlock_spin(&sched_lock);
|
|
return;
|
|
}
|
|
#endif
|
|
if (td->td_wmesg != NULL) {
|
|
strlcpy(kp->ki_wmesg, td->td_wmesg,
|
|
sizeof(kp->ki_wmesg));
|
|
}
|
|
if (TD_ON_LOCK(td)) {
|
|
kp->ki_kiflag |= KI_LOCKBLOCK;
|
|
strlcpy(kp->ki_lockname, td->td_lockname,
|
|
sizeof(kp->ki_lockname));
|
|
}
|
|
|
|
if (p->p_state == PRS_NORMAL) { /* XXXKSE very approximate */
|
|
if (TD_ON_RUNQ(td) ||
|
|
TD_CAN_RUN(td) ||
|
|
TD_IS_RUNNING(td)) {
|
|
kp->ki_stat = SRUN;
|
|
} else if (P_SHOULDSTOP(p)) {
|
|
kp->ki_stat = SSTOP;
|
|
} else if (TD_IS_SLEEPING(td)) {
|
|
kp->ki_stat = SSLEEP;
|
|
} else if (TD_ON_LOCK(td)) {
|
|
kp->ki_stat = SLOCK;
|
|
} else {
|
|
kp->ki_stat = SWAIT;
|
|
}
|
|
} else {
|
|
kp->ki_stat = SIDL;
|
|
}
|
|
|
|
kg = td->td_ksegrp;
|
|
|
|
/* things in the KSE GROUP */
|
|
kp->ki_estcpu = kg->kg_estcpu;
|
|
kp->ki_slptime = kg->kg_slptime;
|
|
kp->ki_pri.pri_user = kg->kg_user_pri;
|
|
kp->ki_pri.pri_class = kg->kg_pri_class;
|
|
|
|
/* Things in the thread */
|
|
kp->ki_wchan = td->td_wchan;
|
|
kp->ki_pri.pri_level = td->td_priority;
|
|
kp->ki_pri.pri_native = td->td_base_pri;
|
|
kp->ki_lastcpu = td->td_lastcpu;
|
|
kp->ki_oncpu = td->td_oncpu;
|
|
kp->ki_tdflags = td->td_flags;
|
|
kp->ki_tid = td->td_tid;
|
|
kp->ki_numthreads = p->p_numthreads;
|
|
kp->ki_pcb = td->td_pcb;
|
|
kp->ki_kstack = (void *)td->td_kstack;
|
|
kp->ki_pctcpu = sched_pctcpu(td);
|
|
|
|
/* We can't get this anymore but ps etc never used it anyway. */
|
|
kp->ki_rqindex = 0;
|
|
|
|
} else {
|
|
kp->ki_stat = SZOMB;
|
|
}
|
|
mtx_unlock_spin(&sched_lock);
|
|
if ((p->p_sflag & PS_INMEM) && p->p_stats != NULL) {
|
|
kp->ki_start = p->p_stats->p_start;
|
|
timevaladd(&kp->ki_start, &boottime);
|
|
kp->ki_rusage = p->p_stats->p_ru;
|
|
calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime);
|
|
calccru(p, &kp->ki_childutime, &kp->ki_childstime);
|
|
|
|
/* Some callers want child-times in a single value */
|
|
kp->ki_childtime = kp->ki_childstime;
|
|
timevaladd(&kp->ki_childtime, &kp->ki_childutime);
|
|
}
|
|
sp = NULL;
|
|
tp = NULL;
|
|
if (p->p_pgrp) {
|
|
kp->ki_pgid = p->p_pgrp->pg_id;
|
|
kp->ki_jobc = p->p_pgrp->pg_jobc;
|
|
sp = p->p_pgrp->pg_session;
|
|
|
|
if (sp != NULL) {
|
|
kp->ki_sid = sp->s_sid;
|
|
SESS_LOCK(sp);
|
|
strlcpy(kp->ki_login, sp->s_login,
|
|
sizeof(kp->ki_login));
|
|
if (sp->s_ttyvp)
|
|
kp->ki_kiflag |= KI_CTTY;
|
|
if (SESS_LEADER(p))
|
|
kp->ki_kiflag |= KI_SLEADER;
|
|
tp = sp->s_ttyp;
|
|
SESS_UNLOCK(sp);
|
|
}
|
|
}
|
|
if ((p->p_flag & P_CONTROLT) && tp != NULL) {
|
|
kp->ki_tdev = dev2udev(tp->t_dev);
|
|
kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
|
|
if (tp->t_session)
|
|
kp->ki_tsid = tp->t_session->s_sid;
|
|
} else
|
|
kp->ki_tdev = NODEV;
|
|
if (p->p_comm[0] != '\0') {
|
|
strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm));
|
|
strlcpy(kp->ki_ocomm, p->p_comm, sizeof(kp->ki_ocomm));
|
|
}
|
|
if (p->p_sysent && p->p_sysent->sv_name != NULL &&
|
|
p->p_sysent->sv_name[0] != '\0')
|
|
strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul));
|
|
kp->ki_siglist = p->p_siglist;
|
|
SIGSETOR(kp->ki_siglist, td->td_siglist);
|
|
kp->ki_sigmask = td->td_sigmask;
|
|
kp->ki_xstat = p->p_xstat;
|
|
kp->ki_acflag = p->p_acflag;
|
|
kp->ki_flag = p->p_flag;
|
|
/* If jailed(p->p_ucred), emulate the old P_JAILED flag. */
|
|
if (jailed(p->p_ucred))
|
|
kp->ki_flag |= P_JAILED;
|
|
kp->ki_lock = p->p_lock;
|
|
if (p->p_pptr)
|
|
kp->ki_ppid = p->p_pptr->p_pid;
|
|
}
|
|
|
|
struct pstats *
|
|
pstats_alloc(void)
|
|
{
|
|
|
|
return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK));
|
|
}
|
|
|
|
/*
|
|
* Copy parts of p_stats; zero the rest of p_stats (statistics).
|
|
*/
|
|
void
|
|
pstats_fork(struct pstats *src, struct pstats *dst)
|
|
{
|
|
|
|
bzero(&dst->pstat_startzero,
|
|
__rangeof(struct pstats, pstat_startzero, pstat_endzero));
|
|
bcopy(&src->pstat_startcopy, &dst->pstat_startcopy,
|
|
__rangeof(struct pstats, pstat_startcopy, pstat_endcopy));
|
|
}
|
|
|
|
void
|
|
pstats_free(struct pstats *ps)
|
|
{
|
|
|
|
free(ps, M_SUBPROC);
|
|
}
|
|
|
|
/*
|
|
* Locate a zombie process by number
|
|
*/
|
|
struct proc *
|
|
zpfind(pid_t pid)
|
|
{
|
|
struct proc *p;
|
|
|
|
sx_slock(&allproc_lock);
|
|
LIST_FOREACH(p, &zombproc, p_list)
|
|
if (p->p_pid == pid) {
|
|
PROC_LOCK(p);
|
|
break;
|
|
}
|
|
sx_sunlock(&allproc_lock);
|
|
return (p);
|
|
}
|
|
|
|
#define KERN_PROC_ZOMBMASK 0x3
|
|
#define KERN_PROC_NOTHREADS 0x4
|
|
|
|
/*
|
|
* Must be called with the process locked and will return with it unlocked.
|
|
*/
|
|
static int
|
|
sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags)
|
|
{
|
|
struct thread *td;
|
|
struct kinfo_proc kinfo_proc;
|
|
int error = 0;
|
|
struct proc *np;
|
|
pid_t pid = p->p_pid;
|
|
|
|
PROC_LOCK_ASSERT(p, MA_OWNED);
|
|
|
|
if (flags & KERN_PROC_NOTHREADS) {
|
|
fill_kinfo_proc(p, &kinfo_proc);
|
|
PROC_UNLOCK(p);
|
|
error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc,
|
|
sizeof(kinfo_proc));
|
|
PROC_LOCK(p);
|
|
} else {
|
|
_PHOLD(p);
|
|
FOREACH_THREAD_IN_PROC(p, td) {
|
|
fill_kinfo_thread(td, &kinfo_proc);
|
|
PROC_UNLOCK(p);
|
|
error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc,
|
|
sizeof(kinfo_proc));
|
|
PROC_LOCK(p);
|
|
if (error)
|
|
break;
|
|
}
|
|
_PRELE(p);
|
|
}
|
|
PROC_UNLOCK(p);
|
|
if (error)
|
|
return (error);
|
|
if (flags & KERN_PROC_ZOMBMASK)
|
|
np = zpfind(pid);
|
|
else {
|
|
if (pid == 0)
|
|
return (0);
|
|
np = pfind(pid);
|
|
}
|
|
if (np == NULL)
|
|
return EAGAIN;
|
|
if (np != p) {
|
|
PROC_UNLOCK(np);
|
|
return EAGAIN;
|
|
}
|
|
PROC_UNLOCK(np);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int *name = (int*) arg1;
|
|
u_int namelen = arg2;
|
|
struct proc *p;
|
|
int flags, doingzomb, oid_number;
|
|
int error = 0;
|
|
|
|
oid_number = oidp->oid_number;
|
|
if (oid_number != KERN_PROC_ALL &&
|
|
(oid_number & KERN_PROC_INC_THREAD) == 0)
|
|
flags = KERN_PROC_NOTHREADS;
|
|
else {
|
|
flags = 0;
|
|
oid_number &= ~KERN_PROC_INC_THREAD;
|
|
}
|
|
if (oid_number == KERN_PROC_PID) {
|
|
if (namelen != 1)
|
|
return (EINVAL);
|
|
p = pfind((pid_t)name[0]);
|
|
if (!p)
|
|
return (ESRCH);
|
|
if ((error = p_cansee(curthread, p))) {
|
|
PROC_UNLOCK(p);
|
|
return (error);
|
|
}
|
|
error = sysctl_out_proc(p, req, flags);
|
|
return (error);
|
|
}
|
|
|
|
switch (oid_number) {
|
|
case KERN_PROC_ALL:
|
|
if (namelen != 0)
|
|
return (EINVAL);
|
|
break;
|
|
case KERN_PROC_PROC:
|
|
if (namelen != 0 && namelen != 1)
|
|
return (EINVAL);
|
|
break;
|
|
default:
|
|
if (namelen != 1)
|
|
return (EINVAL);
|
|
break;
|
|
}
|
|
|
|
if (!req->oldptr) {
|
|
/* overestimate by 5 procs */
|
|
error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
|
|
if (error)
|
|
return (error);
|
|
}
|
|
error = sysctl_wire_old_buffer(req, 0);
|
|
if (error != 0)
|
|
return (error);
|
|
sx_slock(&allproc_lock);
|
|
for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) {
|
|
if (!doingzomb)
|
|
p = LIST_FIRST(&allproc);
|
|
else
|
|
p = LIST_FIRST(&zombproc);
|
|
for (; p != 0; p = LIST_NEXT(p, p_list)) {
|
|
/*
|
|
* Skip embryonic processes.
|
|
*/
|
|
mtx_lock_spin(&sched_lock);
|
|
if (p->p_state == PRS_NEW) {
|
|
mtx_unlock_spin(&sched_lock);
|
|
continue;
|
|
}
|
|
mtx_unlock_spin(&sched_lock);
|
|
PROC_LOCK(p);
|
|
/*
|
|
* Show a user only appropriate processes.
|
|
*/
|
|
if (p_cansee(curthread, p)) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
/*
|
|
* TODO - make more efficient (see notes below).
|
|
* do by session.
|
|
*/
|
|
switch (oid_number) {
|
|
|
|
case KERN_PROC_GID:
|
|
if (p->p_ucred == NULL ||
|
|
p->p_ucred->cr_gid != (gid_t)name[0]) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
break;
|
|
|
|
case KERN_PROC_PGRP:
|
|
/* could do this by traversing pgrp */
|
|
if (p->p_pgrp == NULL ||
|
|
p->p_pgrp->pg_id != (pid_t)name[0]) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
break;
|
|
|
|
case KERN_PROC_RGID:
|
|
if (p->p_ucred == NULL ||
|
|
p->p_ucred->cr_rgid != (gid_t)name[0]) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
break;
|
|
|
|
case KERN_PROC_SESSION:
|
|
if (p->p_session == NULL ||
|
|
p->p_session->s_sid != (pid_t)name[0]) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
break;
|
|
|
|
case KERN_PROC_TTY:
|
|
if ((p->p_flag & P_CONTROLT) == 0 ||
|
|
p->p_session == NULL) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
SESS_LOCK(p->p_session);
|
|
if (p->p_session->s_ttyp == NULL ||
|
|
dev2udev(p->p_session->s_ttyp->t_dev) !=
|
|
(dev_t)name[0]) {
|
|
SESS_UNLOCK(p->p_session);
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
SESS_UNLOCK(p->p_session);
|
|
break;
|
|
|
|
case KERN_PROC_UID:
|
|
if (p->p_ucred == NULL ||
|
|
p->p_ucred->cr_uid != (uid_t)name[0]) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
break;
|
|
|
|
case KERN_PROC_RUID:
|
|
if (p->p_ucred == NULL ||
|
|
p->p_ucred->cr_ruid != (uid_t)name[0]) {
|
|
PROC_UNLOCK(p);
|
|
continue;
|
|
}
|
|
break;
|
|
|
|
case KERN_PROC_PROC:
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
|
|
}
|
|
|
|
error = sysctl_out_proc(p, req, flags | doingzomb);
|
|
if (error) {
|
|
sx_sunlock(&allproc_lock);
|
|
return (error);
|
|
}
|
|
}
|
|
}
|
|
sx_sunlock(&allproc_lock);
|
|
return (0);
|
|
}
|
|
|
|
struct pargs *
|
|
pargs_alloc(int len)
|
|
{
|
|
struct pargs *pa;
|
|
|
|
MALLOC(pa, struct pargs *, sizeof(struct pargs) + len, M_PARGS,
|
|
M_WAITOK);
|
|
pa->ar_ref = 1;
|
|
pa->ar_length = len;
|
|
return (pa);
|
|
}
|
|
|
|
void
|
|
pargs_free(struct pargs *pa)
|
|
{
|
|
|
|
FREE(pa, M_PARGS);
|
|
}
|
|
|
|
void
|
|
pargs_hold(struct pargs *pa)
|
|
{
|
|
|
|
if (pa == NULL)
|
|
return;
|
|
PARGS_LOCK(pa);
|
|
pa->ar_ref++;
|
|
PARGS_UNLOCK(pa);
|
|
}
|
|
|
|
void
|
|
pargs_drop(struct pargs *pa)
|
|
{
|
|
|
|
if (pa == NULL)
|
|
return;
|
|
PARGS_LOCK(pa);
|
|
if (--pa->ar_ref == 0) {
|
|
PARGS_UNLOCK(pa);
|
|
pargs_free(pa);
|
|
} else
|
|
PARGS_UNLOCK(pa);
|
|
}
|
|
|
|
/*
|
|
* This sysctl allows a process to retrieve the argument list or process
|
|
* title for another process without groping around in the address space
|
|
* of the other process. It also allow a process to set its own "process
|
|
* title to a string of its own choice.
|
|
*/
|
|
static int
|
|
sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
int *name = (int*) arg1;
|
|
u_int namelen = arg2;
|
|
struct pargs *newpa, *pa;
|
|
struct proc *p;
|
|
int error = 0;
|
|
|
|
if (namelen != 1)
|
|
return (EINVAL);
|
|
|
|
p = pfind((pid_t)name[0]);
|
|
if (!p)
|
|
return (ESRCH);
|
|
|
|
if ((error = p_cansee(curthread, p)) != 0) {
|
|
PROC_UNLOCK(p);
|
|
return (error);
|
|
}
|
|
|
|
if (req->newptr && curproc != p) {
|
|
PROC_UNLOCK(p);
|
|
return (EPERM);
|
|
}
|
|
|
|
pa = p->p_args;
|
|
pargs_hold(pa);
|
|
PROC_UNLOCK(p);
|
|
if (req->oldptr != NULL && pa != NULL)
|
|
error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length);
|
|
pargs_drop(pa);
|
|
if (error != 0 || req->newptr == NULL)
|
|
return (error);
|
|
|
|
if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit)
|
|
return (ENOMEM);
|
|
newpa = pargs_alloc(req->newlen);
|
|
error = SYSCTL_IN(req, newpa->ar_args, req->newlen);
|
|
if (error != 0) {
|
|
pargs_free(newpa);
|
|
return (error);
|
|
}
|
|
PROC_LOCK(p);
|
|
pa = p->p_args;
|
|
p->p_args = newpa;
|
|
PROC_UNLOCK(p);
|
|
pargs_drop(pa);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
struct proc *p;
|
|
char *sv_name;
|
|
int *name;
|
|
int namelen;
|
|
int error;
|
|
|
|
namelen = arg2;
|
|
if (namelen != 1)
|
|
return (EINVAL);
|
|
|
|
name = (int *)arg1;
|
|
if ((p = pfind((pid_t)name[0])) == NULL)
|
|
return (ESRCH);
|
|
if ((error = p_cansee(curthread, p))) {
|
|
PROC_UNLOCK(p);
|
|
return (error);
|
|
}
|
|
sv_name = p->p_sysent->sv_name;
|
|
PROC_UNLOCK(p);
|
|
return (sysctl_handle_string(oidp, sv_name, 0, req));
|
|
}
|
|
|
|
|
|
SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
|
|
|
|
SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT,
|
|
0, 0, sysctl_kern_proc, "S,proc", "Return entire process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD,
|
|
sysctl_kern_proc, "Return process table, no threads");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args, CTLFLAG_RW | CTLFLAG_ANYBODY,
|
|
sysctl_kern_proc_args, "Process argument list");
|
|
|
|
SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD,
|
|
sysctl_kern_proc_sv_name, "Process syscall vector name (ABI type)");
|
|
|
|
SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td,
|
|
CTLFLAG_RD, sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td,
|
|
CTLFLAG_RD, sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td,
|
|
CTLFLAG_RD, sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD), sid_td,
|
|
CTLFLAG_RD, sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td,
|
|
CTLFLAG_RD, sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td,
|
|
CTLFLAG_RD, sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td,
|
|
CTLFLAG_RD, sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td,
|
|
CTLFLAG_RD, sysctl_kern_proc, "Process table");
|
|
|
|
SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td,
|
|
CTLFLAG_RD, sysctl_kern_proc, "Return process table, no threads");
|