007ddf7e7a
have been unified with that of msleep(9), further refine the sleepq interface and consolidate some duplicated code: - Move the pre-sleep checks for theaded processes into a thread_sleep_check() function in kern_thread.c. - Move all handling of TDF_SINTR to be internal to subr_sleepqueue.c. Specifically, if a thread is awakened by something other than a signal while checking for signals before going to sleep, clear TDF_SINTR in sleepq_catch_signals(). This removes a sched_lock lock/unlock combo in that edge case during an interruptible sleep. Also, fix sleepq_check_signals() to properly handle the condition if TDF_SINTR is clear rather than requiring the callers of the sleepq API to notice this edge case and call a non-_sig variant of sleepq_wait(). - Clarify the flags arguments to sleepq_add(), sleepq_signal() and sleepq_broadcast() by creating an explicit submask for sleepq types. Also, add an explicit SLEEPQ_MSLEEP type rather than a magic number of 0. Also, add a SLEEPQ_INTERRUPTIBLE flag for use with sleepq_add() and move the setting of TDF_SINTR to sleepq_add() if this flag is set rather than sleepq_catch_signals(). Note that it is the caller's responsibility to ensure that sleepq_catch_signals() is called if and only if this flag is passed to the preceeding sleepq_add(). Note that this also removes a sched_lock lock/unlock pair from sleepq_catch_signals(). It also ensures that for an interruptible sleep, TDF_SINTR is always set when TD_ON_SLEEPQ() is true.
982 lines
40 KiB
C
982 lines
40 KiB
C
/*-
|
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* Copyright (c) 1986, 1989, 1991, 1993
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* The Regents of the University of California. All rights reserved.
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* (c) UNIX System Laboratories, Inc.
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* All or some portions of this file are derived from material licensed
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* to the University of California by American Telephone and Telegraph
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* Co. or Unix System Laboratories, Inc. and are reproduced herein with
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* the permission of UNIX System Laboratories, Inc.
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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
|
|
* 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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* @(#)proc.h 8.15 (Berkeley) 5/19/95
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* $FreeBSD$
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*/
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#ifndef _SYS_PROC_H_
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#define _SYS_PROC_H_
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#include <sys/callout.h> /* For struct callout. */
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#include <sys/event.h> /* For struct klist. */
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#ifndef _KERNEL
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#include <sys/filedesc.h>
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#endif
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#include <sys/queue.h>
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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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#include <sys/priority.h>
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#include <sys/rtprio.h> /* XXX. */
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#include <sys/runq.h>
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#include <sys/sigio.h>
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#include <sys/signal.h>
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#ifndef _KERNEL
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#include <sys/time.h> /* For structs itimerval, timeval. */
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#else
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#include <sys/pcpu.h>
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#endif
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#include <sys/ucontext.h>
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#include <sys/ucred.h>
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#include <machine/proc.h> /* Machine-dependent proc substruct. */
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/*
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* One structure allocated per session.
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*
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* List of locks
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* (m) locked by s_mtx mtx
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* (e) locked by proctree_lock sx
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* (c) const until freeing
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*/
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struct session {
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int s_count; /* (m) Ref cnt; pgrps in session. */
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struct proc *s_leader; /* (m + e) Session leader. */
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struct vnode *s_ttyvp; /* (m) Vnode of controlling tty. */
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struct tty *s_ttyp; /* (m) Controlling tty. */
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pid_t s_sid; /* (c) Session ID. */
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/* (m) Setlogin() name: */
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char s_login[roundup(MAXLOGNAME, sizeof(long))];
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struct mtx s_mtx; /* Mutex to protect members. */
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|
};
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|
|
|
/*
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* One structure allocated per process group.
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*
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* List of locks
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* (m) locked by pg_mtx mtx
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* (e) locked by proctree_lock sx
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* (c) const until freeing
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*/
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struct pgrp {
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LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */
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LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */
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struct session *pg_session; /* (c) Pointer to session. */
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struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */
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|
pid_t pg_id; /* (c) Pgrp id. */
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int pg_jobc; /* (m) job cntl proc count */
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|
struct mtx pg_mtx; /* Mutex to protect members */
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|
};
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|
|
|
/*
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* pargs, used to hold a copy of the command line, if it had a sane length.
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|
*/
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|
struct pargs {
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u_int ar_ref; /* Reference count. */
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|
u_int ar_length; /* Length. */
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u_char ar_args[1]; /* Arguments. */
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|
};
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|
|
|
/*-
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* Description of a process.
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|
*
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* This structure contains the information needed to manage a thread of
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* control, known in UN*X as a process; it has references to substructures
|
|
* containing descriptions of things that the process uses, but may share
|
|
* with related processes. The process structure and the substructures
|
|
* are always addressable except for those marked "(CPU)" below,
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* which might be addressable only on a processor on which the process
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* is running.
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*
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* Below is a key of locks used to protect each member of struct proc. The
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* lock is indicated by a reference to a specific character in parens in the
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* associated comment.
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* * - not yet protected
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* a - only touched by curproc or parent during fork/wait
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* b - created at fork, never changes
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* (exception aiods switch vmspaces, but they are also
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* marked 'P_SYSTEM' so hopefully it will be left alone)
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* c - locked by proc mtx
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* d - locked by allproc_lock lock
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* e - locked by proctree_lock lock
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* f - session mtx
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* g - process group mtx
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* h - callout_lock mtx
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* i - by curproc or the master session mtx
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* j - locked by sched_lock mtx
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* k - only accessed by curthread
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* l - the attaching proc or attaching proc parent
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* m - Giant
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* n - not locked, lazy
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* o - ktrace lock
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* p - select lock (sellock)
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* q - td_contested lock
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* r - p_peers lock
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* x - created at fork, only changes during single threading in exec
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* z - zombie threads/kse/ksegroup lock
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*
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* If the locking key specifies two identifiers (for example, p_pptr) then
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* either lock is sufficient for read access, but both locks must be held
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* for write access.
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*/
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struct ithd;
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|
struct ke_sched;
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struct kg_sched;
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|
struct nlminfo;
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|
struct p_sched;
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|
struct sleepqueue;
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|
struct td_sched;
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|
struct trapframe;
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struct turnstile;
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|
|
/*
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* Here we define the four structures used for process information.
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*
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* The first is the thread. It might be thought of as a "Kernel
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* Schedulable Entity Context".
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* This structure contains all the information as to where a thread of
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* execution is now, or was when it was suspended, why it was suspended,
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* and anything else that will be needed to restart it when it is
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* rescheduled. Always associated with a KSE when running, but can be
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* reassigned to an equivalent KSE when being restarted for
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* load balancing. Each of these is associated with a kernel stack
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* and a pcb.
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*
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* It is important to remember that a particular thread structure only
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* exists as long as the system call or kernel entrance (e.g. by pagefault)
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|
* which it is currently executing. It should therefore NEVER be referenced
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* by pointers in long lived structures that live longer than a single
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* request. If several threads complete their work at the same time,
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* they will all rewind their stacks to the user boundary, report their
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* completion state, and all but one will be freed. That last one will
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* be kept to provide a kernel stack and pcb for the NEXT syscall or kernel
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* entrance. (basically to save freeing and then re-allocating it) The KSE
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|
* keeps a cached thread available to allow it to quickly
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* get one when it needs a new one. There is also a system
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* cache of free threads. Threads have priority and partake in priority
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* inheritance schemes.
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*/
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struct thread;
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|
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/*
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* The second structure is the Kernel Schedulable Entity. (KSE)
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* It represents the ability to take a slot in the scheduler queue.
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* As long as this is scheduled, it could continue to run any threads that
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* are assigned to the KSEGRP (see later) until either it runs out
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* of runnable threads of high enough priority, or CPU.
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* It runs on one CPU and is assigned a quantum of time. When a thread is
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* blocked, The KSE continues to run and will search for another thread
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* in a runnable state amongst those it has. It May decide to return to user
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* mode with a new 'empty' thread if there are no runnable threads.
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* Threads are temporarily associated with a KSE for scheduling reasons.
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*/
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struct kse;
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/*
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* The KSEGRP is allocated resources across a number of CPUs.
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* (Including a number of CPUxQUANTA. It parcels these QUANTA up among
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* its KSEs, each of which should be running in a different CPU.
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* BASE priority and total available quanta are properties of a KSEGRP.
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* Multiple KSEGRPs in a single process compete against each other
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* for total quanta in the same way that a forked child competes against
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* it's parent process.
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*/
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struct ksegrp;
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/*
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* A process is the owner of all system resources allocated to a task
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* except CPU quanta.
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* All KSEGs under one process see, and have the same access to, these
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* resources (e.g. files, memory, sockets, credential, kqueues).
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* A process may compete for CPU cycles on the same basis as a
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* forked process cluster by spawning several KSEGRPs.
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*/
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struct proc;
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/***************
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* In pictures:
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With a single run queue used by all processors:
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RUNQ: --->KSE---KSE--... SLEEPQ:[]---THREAD---THREAD---THREAD
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| / []---THREAD
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KSEG---THREAD--THREAD--THREAD []
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[]---THREAD---THREAD
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|
(processors run THREADs from the KSEG until they are exhausted or
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the KSEG exhausts its quantum)
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With PER-CPU run queues:
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KSEs on the separate run queues directly
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They would be given priorities calculated from the KSEG.
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|
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*
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*****************/
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/*
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* Kernel runnable context (thread).
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* This is what is put to sleep and reactivated.
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* The first KSE available in the correct group will run this thread.
|
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* If several are available, use the one on the same CPU as last time.
|
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* When waiting to be run, threads are hung off the KSEGRP in priority order.
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* with N runnable and queued KSEs in the KSEGRP, the first N threads
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* are linked to them. Other threads are not yet assigned.
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*/
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struct thread {
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struct proc *td_proc; /* (*) Associated process. */
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struct ksegrp *td_ksegrp; /* (*) Associated KSEG. */
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TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */
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TAILQ_ENTRY(thread) td_kglist; /* (*) All threads in this ksegrp. */
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|
|
/* The two queues below should someday be merged. */
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TAILQ_ENTRY(thread) td_slpq; /* (j) Sleep queue. */
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TAILQ_ENTRY(thread) td_lockq; /* (j) Lock queue. */
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TAILQ_ENTRY(thread) td_runq; /* (j/z) Run queue(s). XXXKSE */
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TAILQ_HEAD(, selinfo) td_selq; /* (p) List of selinfos. */
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struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */
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struct turnstile *td_turnstile; /* (k) Associated turnstile. */
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lwpid_t td_tid; /* (b) Thread ID. */
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|
|
|
/* Cleared during fork1() or thread_schedule_upcall(). */
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|
#define td_startzero td_flags
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|
int td_flags; /* (j) TDF_* flags. */
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|
int td_inhibitors; /* (j) Why can not run. */
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int td_pflags; /* (k) Private thread (TDP_*) flags. */
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struct kse *td_last_kse; /* (j) Previous value of td_kse. */
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|
struct kse *td_kse; /* (j) Current KSE if any. */
|
|
int td_dupfd; /* (k) Ret value from fdopen. XXX */
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|
void *td_wchan; /* (j) Sleep address. */
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|
const char *td_wmesg; /* (j) Reason for sleep. */
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|
u_char td_lastcpu; /* (j) Last cpu we were on. */
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|
u_char td_oncpu; /* (j) Which cpu we are on. */
|
|
short td_locks; /* (k) DEBUG: lockmgr count of locks. */
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|
struct turnstile *td_blocked; /* (j) Lock process is blocked on. */
|
|
struct ithd *td_ithd; /* (b) For interrupt threads only. */
|
|
const char *td_lockname; /* (j) Name of lock blocked on. */
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LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */
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struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
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|
int td_intr_nesting_level; /* (k) Interrupt recursion. */
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|
int td_pinned; /* (k) Temporary cpu pin count. */
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|
struct kse_thr_mailbox *td_mailbox; /* (*) Userland mailbox address. */
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struct ucred *td_ucred; /* (k) Reference to credentials. */
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|
struct thread *td_standin; /* (*) Use this for an upcall. */
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u_int td_prticks; /* (*) Profclock hits in sys for user */
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struct kse_upcall *td_upcall; /* (*) Upcall structure. */
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|
u_int64_t td_sticks; /* (j) Statclock hits in system mode. */
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u_int td_uuticks; /* (*) Statclock in user, for UTS. */
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u_int td_usticks; /* (*) Statclock in kernel, for UTS. */
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|
int td_intrval; /* (*) Return value of TDF_INTERRUPT. */
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sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */
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|
sigset_t td_sigmask; /* (c) Current signal mask. */
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|
sigset_t td_siglist; /* (c) Sigs arrived, not delivered. */
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|
sigset_t *td_waitset; /* (c) Wait set for sigwait. */
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TAILQ_ENTRY(thread) td_umtx; /* (c?) Link for when we're blocked. */
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volatile u_int td_generation; /* (k) Enable detection of preemption */
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stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */
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|
int td_kflags; /* (c) Flags for KSE threading. */
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|
int td_xsig; /* (c) Signal for ptrace */
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|
u_long td_profil_addr; /* (k) Temporary addr until AST. */
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|
u_int td_profil_ticks; /* (k) Temporary ticks until AST. */
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|
#define td_endzero td_base_pri
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|
|
|
/* Copied during fork1() or thread_sched_upcall(). */
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#define td_startcopy td_endzero
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u_char td_base_pri; /* (j) Thread base kernel priority. */
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u_char td_priority; /* (j) Thread active priority. */
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#define td_endcopy td_pcb
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|
|
|
/*
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|
* fields that must be manually set in fork1() or thread_sched_upcall()
|
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* or already have been set in the allocator, contstructor, etc..
|
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*/
|
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struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
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enum {
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TDS_INACTIVE = 0x0,
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TDS_INHIBITED,
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TDS_CAN_RUN,
|
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TDS_RUNQ,
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TDS_RUNNING
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} td_state;
|
|
register_t td_retval[2]; /* (k) Syscall aux returns. */
|
|
struct callout td_slpcallout; /* (h) Callout for sleep. */
|
|
struct trapframe *td_frame; /* (k) */
|
|
struct vm_object *td_kstack_obj;/* (a) Kstack object. */
|
|
vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
|
|
int td_kstack_pages; /* (a) Size of the kstack. */
|
|
struct vm_object *td_altkstack_obj;/* (a) Alternate kstack object. */
|
|
vm_offset_t td_altkstack; /* (a) Kernel VA of alternate kstack. */
|
|
int td_altkstack_pages; /* (a) Size of the alt kstack */
|
|
u_int td_critnest; /* (k) Critical section nest level. */
|
|
struct mdthread td_md; /* (k) Any machine-dependent fields. */
|
|
struct td_sched *td_sched; /* (*) Scheduler-specific data. */
|
|
};
|
|
|
|
/*
|
|
* Flags kept in td_flags:
|
|
* To change these you MUST have the scheduler lock.
|
|
*/
|
|
#define TDF_UNUSED0 0x00000001 /* --available -- */
|
|
#define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */
|
|
#define TDF_CAN_UNBIND 0x00000004 /* Only temporarily bound. */
|
|
#define TDF_SINTR 0x00000008 /* Sleep is interruptible. */
|
|
#define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */
|
|
#define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */
|
|
#define TDF_SELECT 0x00000040 /* Selecting; wakeup/waiting danger. */
|
|
#define TDF_UNUSED7 0x00000080 /* --available -- */
|
|
#define TDF_TSNOBLOCK 0x00000100 /* Don't block on a turnstile due to race. */
|
|
#define TDF_UNUSED9 0x00000200 /* --available -- */
|
|
#define TDF_UNUSED10 0x00000400 /* --available -- */
|
|
#define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */
|
|
#define TDF_TIMOFAIL 0x00001000 /* Timeout from sleep after we were awake. */
|
|
#define TDF_INTERRUPT 0x00002000 /* Thread is marked as interrupted. */
|
|
#define TDF_UNUSED14 0x00004000 /* --available -- */
|
|
#define TDF_UNUSED15 0x00008000 /* --available -- */
|
|
#define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */
|
|
#define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */
|
|
#define TDF_XSIG 0x00040000 /* Thread is exchanging signal under trace */
|
|
#define TDF_UMTXWAKEUP 0x00080000 /* Libthr thread must not sleep on a umtx. */
|
|
#define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */
|
|
#define TDF_DBSUSPEND 0x00200000 /* Thread is suspended by debugger */
|
|
#define TDF_UNUSED22 0x00400000 /* --available -- */
|
|
#define TDF_UNUSED23 0x00800000 /* --available -- */
|
|
#define TDF_SCHED1 0x01000000 /* Reserved for scheduler private use */
|
|
#define TDF_SCHED2 0x02000000 /* Reserved for scheduler private use */
|
|
#define TDF_SCHED3 0x04000000 /* Reserved for scheduler private use */
|
|
#define TDF_SCHED4 0x08000000 /* Reserved for scheduler private use */
|
|
|
|
/*
|
|
* "Private" flags kept in td_pflags:
|
|
* These are only accessed by curthread and thus need no locking.
|
|
*/
|
|
#define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */
|
|
#define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */
|
|
#define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */
|
|
#define TDP_UPCALLING 0x00000008 /* This thread is doing an upcall. */
|
|
#define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */
|
|
#define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */
|
|
#define TDP_DEADLKTREAT 0x00000040 /* Lock aquisition - deadlock treatment. */
|
|
#define TDP_SA 0x00000080 /* A scheduler activation based thread. */
|
|
#define TDP_OWEPREEMPT 0x00000100 /* Thread has a pending preemption. */
|
|
#define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */
|
|
#define TDP_USTATCLOCK 0x00000400 /* Finish user statclock hit at next AST. */
|
|
#define TDP_UNUSED11 0x00000800 /* -- available-- */
|
|
#define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */
|
|
#define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */
|
|
#define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */
|
|
#define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */
|
|
|
|
/*
|
|
* Reasons that the current thread can not be run yet.
|
|
* More than one may apply.
|
|
*/
|
|
#define TDI_SUSPENDED 0x0001 /* On suspension queue. */
|
|
#define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
|
|
#define TDI_SWAPPED 0x0004 /* Stack not in mem.. bad juju if run. */
|
|
#define TDI_LOCK 0x0008 /* Stopped on a lock. */
|
|
#define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
|
|
|
|
/*
|
|
* flags (in kflags) related to M:N threading.
|
|
*/
|
|
#define TDK_KSEREL 0x0001 /* Blocked in msleep on kg->kg_completed. */
|
|
#define TDK_KSERELSIG 0x0002 /* Blocked in msleep on p->p_siglist. */
|
|
#define TDK_WAKEUP 0x0004 /* Thread has been woken by kse_wakeup. */
|
|
|
|
#define TD_CAN_UNBIND(td) \
|
|
(((td)->td_flags & TDF_CAN_UNBIND) == TDF_CAN_UNBIND && \
|
|
((td)->td_upcall != NULL))
|
|
|
|
#define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
|
|
#define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
|
|
#define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
|
|
#define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
|
|
#define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
|
|
#define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
|
|
#define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
|
|
#define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
|
|
#define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
|
|
#define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
|
|
|
|
#define TD_SET_INHIB(td, inhib) do { \
|
|
(td)->td_state = TDS_INHIBITED; \
|
|
(td)->td_inhibitors |= (inhib); \
|
|
} while (0)
|
|
|
|
#define TD_CLR_INHIB(td, inhib) do { \
|
|
if (((td)->td_inhibitors & (inhib)) && \
|
|
(((td)->td_inhibitors &= ~(inhib)) == 0)) \
|
|
(td)->td_state = TDS_CAN_RUN; \
|
|
} while (0)
|
|
|
|
#define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
|
|
#define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
|
|
#define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
|
|
#define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
|
|
#define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
|
|
#define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
|
|
|
|
#define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
|
|
#define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
|
|
#define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
|
|
#define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
|
|
#define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
|
|
|
|
#define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING
|
|
#define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ
|
|
#define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN
|
|
|
|
/*
|
|
* The schedulable entity that can be given a context to run.
|
|
* A process may have several of these. Probably one per processor
|
|
* but posibly a few more. In this universe they are grouped
|
|
* with a KSEG that contains the priority and niceness
|
|
* for the group.
|
|
*/
|
|
struct kse {
|
|
struct proc *ke_proc; /* (*) Associated process. */
|
|
struct ksegrp *ke_ksegrp; /* (*) Associated KSEG. */
|
|
TAILQ_ENTRY(kse) ke_kglist; /* (*) Queue of KSEs in ke_ksegrp. */
|
|
TAILQ_ENTRY(kse) ke_kgrlist; /* (*) Queue of KSEs in this state. */
|
|
TAILQ_ENTRY(kse) ke_procq; /* (j/z) Run queue. */
|
|
|
|
#define ke_startzero ke_flags
|
|
int ke_flags; /* (j) KEF_* flags. */
|
|
struct thread *ke_thread; /* (*) Active associated thread. */
|
|
fixpt_t ke_pctcpu; /* (j) %cpu during p_swtime. */
|
|
u_char ke_oncpu; /* (j) Which cpu we are on. */
|
|
char ke_rqindex; /* (j) Run queue index. */
|
|
enum {
|
|
KES_UNUSED = 0x0,
|
|
KES_IDLE,
|
|
KES_ONRUNQ,
|
|
KES_UNQUEUED, /* in transit */
|
|
KES_THREAD /* slaved to thread state */
|
|
} ke_state; /* (j) KSE status. */
|
|
#define ke_endzero ke_sched
|
|
struct ke_sched *ke_sched; /* (*) Scheduler-specific data. */
|
|
};
|
|
|
|
/* flags kept in ke_flags */
|
|
#define KEF_SCHED0 0x00001 /* For scheduler-specific use. */
|
|
#define KEF_SCHED1 0x00002 /* For scheduler-specific use. */
|
|
#define KEF_SCHED2 0X00004 /* For scheduler-specific use. */
|
|
#define KEF_SCHED3 0x00008 /* For scheduler-specific use. */
|
|
#define KEF_DIDRUN 0x02000 /* KSE actually ran. */
|
|
#define KEF_EXIT 0x04000 /* KSE is being killed. */
|
|
|
|
/*
|
|
* The upcall management structure.
|
|
* The upcall is used when returning to userland. If a thread does not have
|
|
* an upcall on return to userland the thread exports its context and exits.
|
|
*/
|
|
struct kse_upcall {
|
|
TAILQ_ENTRY(kse_upcall) ku_link; /* List of upcalls in KSEG. */
|
|
struct ksegrp *ku_ksegrp; /* Associated KSEG. */
|
|
struct thread *ku_owner; /* owning thread */
|
|
int ku_flags; /* KUF_* flags. */
|
|
struct kse_mailbox *ku_mailbox; /* userland mailbox address. */
|
|
stack_t ku_stack; /* userland upcall stack. */
|
|
void *ku_func; /* userland upcall function. */
|
|
unsigned int ku_mflags; /* cached upcall mailbox flags */
|
|
};
|
|
|
|
#define KUF_DOUPCALL 0x00001 /* Do upcall now, don't wait. */
|
|
#define KUF_EXITING 0x00002 /* Upcall structure is exiting. */
|
|
|
|
/*
|
|
* Kernel-scheduled entity group (KSEG). The scheduler considers each KSEG to
|
|
* be an indivisible unit from a time-sharing perspective, though each KSEG may
|
|
* contain multiple KSEs.
|
|
*/
|
|
struct ksegrp {
|
|
struct proc *kg_proc; /* (*) Process that contains this KSEG. */
|
|
TAILQ_ENTRY(ksegrp) kg_ksegrp; /* (*) Queue of KSEGs in kg_proc. */
|
|
TAILQ_HEAD(, kse) kg_kseq; /* (ke_kglist) All KSEs. */
|
|
TAILQ_HEAD(, kse) kg_iq; /* (ke_kgrlist) All idle KSEs. */
|
|
TAILQ_HEAD(, thread) kg_threads;/* (td_kglist) All threads. */
|
|
TAILQ_HEAD(, thread) kg_runq; /* (td_runq) waiting RUNNABLE threads */
|
|
TAILQ_HEAD(, thread) kg_slpq; /* (td_runq) NONRUNNABLE threads. */
|
|
TAILQ_HEAD(, kse_upcall) kg_upcalls; /* All upcalls in the group. */
|
|
#define kg_startzero kg_estcpu
|
|
u_int kg_estcpu; /* (j) Sum of the same field in KSEs. */
|
|
u_int kg_slptime; /* (j) How long completely blocked. */
|
|
struct thread *kg_last_assigned; /* (j) Last thread assigned to a KSE. */
|
|
int kg_runnable; /* (j) Num runnable threads on queue. */
|
|
int kg_runq_kses; /* (j) Num KSEs on runq. */
|
|
int kg_idle_kses; /* (j) Num KSEs on iq. */
|
|
int kg_numupcalls; /* (j) Num upcalls. */
|
|
int kg_upsleeps; /* (c) Num threads in kse_release(). */
|
|
struct kse_thr_mailbox *kg_completed; /* (c) Completed thread mboxes. */
|
|
int kg_nextupcall; /* (*) Next upcall time. */
|
|
int kg_upquantum; /* (*) Quantum to schedule an upcall. */
|
|
#define kg_endzero kg_pri_class
|
|
|
|
#define kg_startcopy kg_endzero
|
|
u_char kg_pri_class; /* (j) Scheduling class. */
|
|
u_char kg_user_pri; /* (j) User pri from estcpu and nice. */
|
|
#define kg_endcopy kg_numthreads
|
|
int kg_numthreads; /* (j) Num threads in total. */
|
|
int kg_kses; /* (j) Num KSEs in group. */
|
|
int kg_concurrency; /* (j) Num KSEs requested in group. */
|
|
struct kg_sched *kg_sched; /* (*) Scheduler-specific data. */
|
|
};
|
|
|
|
/*
|
|
* The old fashionned process. May have multiple threads, KSEGRPs
|
|
* and KSEs. Starts off with a single embedded KSEGRP, KSE and THREAD.
|
|
*/
|
|
struct proc {
|
|
LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
|
|
TAILQ_HEAD(, ksegrp) p_ksegrps; /* (c)(kg_ksegrp) All KSEGs. */
|
|
TAILQ_HEAD(, thread) p_threads; /* (j)(td_plist) Threads. (shortcut) */
|
|
TAILQ_HEAD(, thread) p_suspended; /* (td_runq) Suspended threads. */
|
|
struct ucred *p_ucred; /* (c) Process owner's identity. */
|
|
struct filedesc *p_fd; /* (b) Ptr to open files structure. */
|
|
struct filedesc_to_leader *p_fdtol; /* (b) Ptr to tracking node */
|
|
/* Accumulated stats for all KSEs? */
|
|
struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
|
|
struct plimit *p_limit; /* (c) Process limits. */
|
|
struct vm_object *p_upages_obj; /* (a) Upages object. */
|
|
struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */
|
|
/*
|
|
* The following don't make too much sense..
|
|
* See the td_ or ke_ versions of the same flags
|
|
*/
|
|
int p_flag; /* (c) P_* flags. */
|
|
int p_sflag; /* (j) PS_* flags. */
|
|
enum {
|
|
PRS_NEW = 0, /* In creation */
|
|
PRS_NORMAL, /* KSEs can be run. */
|
|
PRS_ZOMBIE
|
|
} p_state; /* (j/c) S* process status. */
|
|
pid_t p_pid; /* (b) Process identifier. */
|
|
LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
|
|
LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
|
|
struct proc *p_pptr; /* (c + e) Pointer to parent process. */
|
|
LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
|
|
LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
|
|
struct mtx p_mtx; /* (n) Lock for this struct. */
|
|
|
|
/* The following fields are all zeroed upon creation in fork. */
|
|
#define p_startzero p_oppid
|
|
pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */
|
|
struct vmspace *p_vmspace; /* (b) Address space. */
|
|
u_int p_swtime; /* (j) Time swapped in or out. */
|
|
struct itimerval p_realtimer; /* (c) Alarm timer. */
|
|
struct bintime p_runtime; /* (j) Real time. */
|
|
u_int64_t p_uu; /* (j) Previous user time in usec. */
|
|
u_int64_t p_su; /* (j) Previous system time in usec. */
|
|
u_int64_t p_iu; /* (j) Previous intr time in usec. */
|
|
u_int64_t p_uticks; /* (j) Statclock hits in user mode. */
|
|
u_int64_t p_sticks; /* (j) Statclock hits in system mode. */
|
|
u_int64_t p_iticks; /* (j) Statclock hits in intr. */
|
|
int p_profthreads; /* (c) Num threads in addupc_task. */
|
|
int p_maxthrwaits; /* (c) Max threads num waiters */
|
|
int p_traceflag; /* (o) Kernel trace points. */
|
|
struct vnode *p_tracevp; /* (c + o) Trace to vnode. */
|
|
struct ucred *p_tracecred; /* (o) Credentials to trace with. */
|
|
struct vnode *p_textvp; /* (b) Vnode of executable. */
|
|
sigset_t p_siglist; /* (c) Sigs not delivered to a td. */
|
|
char p_lock; /* (c) Proclock (prevent swap) count. */
|
|
struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
|
|
int p_sigparent; /* (c) Signal to parent on exit. */
|
|
int p_sig; /* (n) For core dump/debugger XXX. */
|
|
u_long p_code; /* (n) For core dump/debugger XXX. */
|
|
u_int p_stops; /* (c) Stop event bitmask. */
|
|
u_int p_stype; /* (c) Stop event type. */
|
|
char p_step; /* (c) Process is stopped. */
|
|
u_char p_pfsflags; /* (c) Procfs flags. */
|
|
struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
|
|
void *p_aioinfo; /* (?) ASYNC I/O info. */
|
|
struct thread *p_singlethread;/* (c + j) If single threading this is it */
|
|
int p_suspcount; /* (c) # threads in suspended mode */
|
|
struct thread *p_xthread; /* (c) Trap thread */
|
|
/* End area that is zeroed on creation. */
|
|
#define p_endzero p_magic
|
|
|
|
/* The following fields are all copied upon creation in fork. */
|
|
#define p_startcopy p_endzero
|
|
u_int p_magic; /* (b) Magic number. */
|
|
char p_comm[MAXCOMLEN + 1]; /* (b) Process name. */
|
|
struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
|
|
struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
|
|
struct pargs *p_args; /* (c) Process arguments. */
|
|
rlim_t p_cpulimit; /* (j) Current CPU limit in seconds. */
|
|
signed char p_nice; /* (c + j) Process "nice" value. */
|
|
/* End area that is copied on creation. */
|
|
#define p_endcopy p_xstat
|
|
|
|
u_short p_xstat; /* (c) Exit status; also stop sig. */
|
|
struct knlist p_klist; /* (c) Knotes attached to this proc. */
|
|
int p_numthreads; /* (j) Number of threads. */
|
|
int p_numksegrps; /* (c) number of ksegrps */
|
|
struct mdproc p_md; /* Any machine-dependent fields. */
|
|
struct callout p_itcallout; /* (h + c) Interval timer callout. */
|
|
struct user *p_uarea; /* (k) Kernel VA of u-area (CPU). */
|
|
u_short p_acflag; /* (c) Accounting flags. */
|
|
struct rusage *p_ru; /* (a) Exit information. XXX */
|
|
struct proc *p_peers; /* (r) */
|
|
struct proc *p_leader; /* (b) */
|
|
void *p_emuldata; /* (c) Emulator state data. */
|
|
struct label *p_label; /* (*) Proc (not subject) MAC label. */
|
|
struct p_sched *p_sched; /* (*) Scheduler-specific data. */
|
|
};
|
|
|
|
#define p_session p_pgrp->pg_session
|
|
#define p_pgid p_pgrp->pg_id
|
|
|
|
#define NOCPU 0xff /* For when we aren't on a CPU. (SMP) */
|
|
|
|
/* Status values (p_stat). */
|
|
|
|
/* These flags are kept in p_flag. */
|
|
#define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
|
|
#define P_CONTROLT 0x00002 /* Has a controlling terminal. */
|
|
#define P_KTHREAD 0x00004 /* Kernel thread. (*)*/
|
|
#define P_NOLOAD 0x00008 /* Ignore during load avg calculations. */
|
|
#define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
|
|
#define P_PROFIL 0x00020 /* Has started profiling. */
|
|
#define P_STOPPROF 0x00040 /* Has thread in requesting to stop prof */
|
|
#define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */
|
|
#define P_SUGID 0x00100 /* Had set id privileges since last exec. */
|
|
#define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
|
|
#define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */
|
|
#define P_TRACED 0x00800 /* Debugged process being traced. */
|
|
#define P_WAITED 0x01000 /* Someone is waiting for us. */
|
|
#define P_WEXIT 0x02000 /* Working on exiting. */
|
|
#define P_EXEC 0x04000 /* Process called exec. */
|
|
#define P_SA 0x08000 /* Using scheduler activations. */
|
|
#define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
|
|
#define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */
|
|
#define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */
|
|
#define P_STOPPED_SINGLE 0x80000 /* Only one thread can continue */
|
|
/* (not to user) */
|
|
#define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
|
|
#define P_SIGEVENT 0x200000 /* Process pending signals changed. */
|
|
|
|
#define P_JAILED 0x1000000 /* Process is in jail. */
|
|
#define P_INEXEC 0x4000000 /* Process is in execve(). */
|
|
|
|
#define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
|
|
#define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
|
|
|
|
/* These flags are kept in p_sflag and are protected with sched_lock. */
|
|
#define PS_INMEM 0x00001 /* Loaded into memory. */
|
|
#define PS_XCPU 0x00002 /* Exceeded CPU limit. */
|
|
#define PS_ALRMPEND 0x00020 /* Pending SIGVTALRM needs to be posted. */
|
|
#define PS_PROFPEND 0x00040 /* Pending SIGPROF needs to be posted. */
|
|
#define PS_SWAPINREQ 0x00100 /* Swapin request due to wakeup. */
|
|
#define PS_SWAPPINGOUT 0x00200 /* Process is being swapped out. */
|
|
#define PS_SWAPPINGIN 0x04000 /* Process is being swapped in. */
|
|
#define PS_MACPEND 0x08000 /* Ast()-based MAC event pending. */
|
|
|
|
/* used only in legacy conversion code */
|
|
#define SIDL 1 /* Process being created by fork. */
|
|
#define SRUN 2 /* Currently runnable. */
|
|
#define SSLEEP 3 /* Sleeping on an address. */
|
|
#define SSTOP 4 /* Process debugging or suspension. */
|
|
#define SZOMB 5 /* Awaiting collection by parent. */
|
|
#define SWAIT 6 /* Waiting for interrupt. */
|
|
#define SLOCK 7 /* Blocked on a lock. */
|
|
|
|
#define P_MAGIC 0xbeefface
|
|
|
|
#ifdef _KERNEL
|
|
|
|
/* Flags for mi_switch(). */
|
|
#define SW_VOL 0x0001 /* Voluntary switch. */
|
|
#define SW_INVOL 0x0002 /* Involuntary switch. */
|
|
|
|
/* How values for thread_single(). */
|
|
#define SINGLE_NO_EXIT 0
|
|
#define SINGLE_EXIT 1
|
|
|
|
/* XXXKSE: Missing values for thread_signal_check(). */
|
|
|
|
#ifdef MALLOC_DECLARE
|
|
MALLOC_DECLARE(M_PARGS);
|
|
MALLOC_DECLARE(M_PGRP);
|
|
MALLOC_DECLARE(M_SESSION);
|
|
MALLOC_DECLARE(M_SUBPROC);
|
|
MALLOC_DECLARE(M_ZOMBIE);
|
|
#endif
|
|
|
|
#define FOREACH_PROC_IN_SYSTEM(p) \
|
|
LIST_FOREACH((p), &allproc, p_list)
|
|
#define FOREACH_KSEGRP_IN_PROC(p, kg) \
|
|
TAILQ_FOREACH((kg), &(p)->p_ksegrps, kg_ksegrp)
|
|
#define FOREACH_THREAD_IN_GROUP(kg, td) \
|
|
TAILQ_FOREACH((td), &(kg)->kg_threads, td_kglist)
|
|
#define FOREACH_KSE_IN_GROUP(kg, ke) \
|
|
TAILQ_FOREACH((ke), &(kg)->kg_kseq, ke_kglist)
|
|
#define FOREACH_UPCALL_IN_GROUP(kg, ku) \
|
|
TAILQ_FOREACH((ku), &(kg)->kg_upcalls, ku_link)
|
|
#define FOREACH_THREAD_IN_PROC(p, td) \
|
|
TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
|
|
|
|
/* XXXKSE the lines below should probably only be used in 1:1 code */
|
|
#define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads)
|
|
#define FIRST_KSEGRP_IN_PROC(p) TAILQ_FIRST(&(p)->p_ksegrps)
|
|
#define FIRST_KSE_IN_KSEGRP(kg) TAILQ_FIRST(&(kg)->kg_kseq)
|
|
#define FIRST_KSE_IN_PROC(p) FIRST_KSE_IN_KSEGRP(FIRST_KSEGRP_IN_PROC(p))
|
|
|
|
/*
|
|
* We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
|
|
* as it is used to represent "no process group".
|
|
*/
|
|
#define PID_MAX 99999
|
|
#define NO_PID 100000
|
|
|
|
#define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
|
|
#define SESSHOLD(s) ((s)->s_count++)
|
|
#define SESSRELE(s) { \
|
|
if (--(s)->s_count == 0) \
|
|
FREE(s, M_SESSION); \
|
|
}
|
|
|
|
#define STOPEVENT(p, e, v) do { \
|
|
if ((p)->p_stops & (e)) { \
|
|
PROC_LOCK(p); \
|
|
stopevent((p), (e), (v)); \
|
|
PROC_UNLOCK(p); \
|
|
} \
|
|
} while (0)
|
|
#define _STOPEVENT(p, e, v) do { \
|
|
PROC_LOCK_ASSERT(p, MA_OWNED); \
|
|
if ((p)->p_stops & (e)) \
|
|
stopevent((p), (e), (v)); \
|
|
} while (0)
|
|
|
|
/* Lock and unlock a process. */
|
|
#define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
|
|
#define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
|
|
#define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
|
|
#define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
|
|
#define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
|
|
|
|
/* Lock and unlock a process group. */
|
|
#define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
|
|
#define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
|
|
#define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
|
|
#define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
|
|
|
|
#define PGRP_LOCK_PGSIGNAL(pg) do { \
|
|
if ((pg) != NULL) \
|
|
PGRP_LOCK(pg); \
|
|
} while (0)
|
|
#define PGRP_UNLOCK_PGSIGNAL(pg) do { \
|
|
if ((pg) != NULL) \
|
|
PGRP_UNLOCK(pg); \
|
|
} while (0)
|
|
|
|
/* Lock and unlock a session. */
|
|
#define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
|
|
#define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
|
|
#define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
|
|
#define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
|
|
|
|
/* Hold process U-area in memory, normally for ptrace/procfs work. */
|
|
#define PHOLD(p) do { \
|
|
PROC_LOCK(p); \
|
|
_PHOLD(p); \
|
|
PROC_UNLOCK(p); \
|
|
} while (0)
|
|
#define _PHOLD(p) do { \
|
|
PROC_LOCK_ASSERT((p), MA_OWNED); \
|
|
(p)->p_lock++; \
|
|
if (((p)->p_sflag & PS_INMEM) == 0) \
|
|
faultin((p)); \
|
|
} while (0)
|
|
|
|
#define PRELE(p) do { \
|
|
PROC_LOCK((p)); \
|
|
_PRELE((p)); \
|
|
PROC_UNLOCK((p)); \
|
|
} while (0)
|
|
#define _PRELE(p) do { \
|
|
PROC_LOCK_ASSERT((p), MA_OWNED); \
|
|
(--(p)->p_lock); \
|
|
} while (0)
|
|
|
|
/* Check whether a thread is safe to be swapped out. */
|
|
#define thread_safetoswapout(td) (TD_IS_SLEEPING(td) || TD_IS_SUSPENDED(td))
|
|
|
|
/* Lock and unlock process arguments. */
|
|
#define PARGS_LOCK(p) mtx_lock(&pargs_ref_lock)
|
|
#define PARGS_UNLOCK(p) mtx_unlock(&pargs_ref_lock)
|
|
|
|
#define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
|
|
extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
|
|
extern u_long pidhash;
|
|
|
|
#define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
|
|
extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
|
|
extern u_long pgrphash;
|
|
|
|
extern struct sx allproc_lock;
|
|
extern struct sx proctree_lock;
|
|
extern struct mtx pargs_ref_lock;
|
|
extern struct mtx ppeers_lock;
|
|
extern struct proc proc0; /* Process slot for swapper. */
|
|
extern struct thread thread0; /* Primary thread in proc0. */
|
|
extern struct ksegrp ksegrp0; /* Primary ksegrp in proc0. */
|
|
extern struct kse kse0; /* Primary kse in proc0. */
|
|
extern struct vmspace vmspace0; /* VM space for proc0. */
|
|
extern int hogticks; /* Limit on kernel cpu hogs. */
|
|
extern int nprocs, maxproc; /* Current and max number of procs. */
|
|
extern int maxprocperuid; /* Max procs per uid. */
|
|
extern u_long ps_arg_cache_limit;
|
|
extern int sched_quantum; /* Scheduling quantum in ticks. */
|
|
|
|
LIST_HEAD(proclist, proc);
|
|
TAILQ_HEAD(procqueue, proc);
|
|
TAILQ_HEAD(threadqueue, thread);
|
|
extern struct proclist allproc; /* List of all processes. */
|
|
extern struct proclist zombproc; /* List of zombie processes. */
|
|
extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
|
|
extern struct proc *updateproc; /* Process slot for syncer (sic). */
|
|
|
|
extern struct uma_zone *proc_zone;
|
|
|
|
extern int lastpid;
|
|
|
|
struct proc *pfind(pid_t); /* Find process by id. */
|
|
struct pgrp *pgfind(pid_t); /* Find process group by id. */
|
|
struct proc *zpfind(pid_t); /* Find zombie process by id. */
|
|
|
|
void adjustrunqueue(struct thread *, int newpri);
|
|
void ast(struct trapframe *framep);
|
|
struct thread *choosethread(void);
|
|
int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
|
|
int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, struct session *sess);
|
|
int enterthispgrp(struct proc *p, struct pgrp *pgrp);
|
|
void faultin(struct proc *p);
|
|
void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
|
|
int fork1(struct thread *, int, int, struct proc **);
|
|
void fork_exit(void (*)(void *, struct trapframe *), void *,
|
|
struct trapframe *);
|
|
void fork_return(struct thread *, struct trapframe *);
|
|
int inferior(struct proc *p);
|
|
int leavepgrp(struct proc *p);
|
|
int maybe_preempt(struct thread *td);
|
|
void mi_switch(int flags, struct thread *newtd);
|
|
int p_candebug(struct thread *td, struct proc *p);
|
|
int p_cansee(struct thread *td, struct proc *p);
|
|
int p_cansched(struct thread *td, struct proc *p);
|
|
int p_cansignal(struct thread *td, struct proc *p, int signum);
|
|
struct pargs *pargs_alloc(int len);
|
|
void pargs_drop(struct pargs *pa);
|
|
void pargs_free(struct pargs *pa);
|
|
void pargs_hold(struct pargs *pa);
|
|
void procinit(void);
|
|
void threadinit(void);
|
|
void proc_linkup(struct proc *p, struct ksegrp *kg,
|
|
struct kse *ke, struct thread *td);
|
|
void proc_reparent(struct proc *child, struct proc *newparent);
|
|
int securelevel_ge(struct ucred *cr, int level);
|
|
int securelevel_gt(struct ucred *cr, int level);
|
|
void setrunnable(struct thread *);
|
|
void setrunqueue(struct thread *);
|
|
void setsugid(struct proc *p);
|
|
int sigonstack(size_t sp);
|
|
void sleepinit(void);
|
|
void stopevent(struct proc *, u_int, u_int);
|
|
void cpu_idle(void);
|
|
extern void (*cpu_idle_hook)(void); /* Hook to machdep CPU idler. */
|
|
void cpu_switch(struct thread *old, struct thread *new);
|
|
void cpu_throw(struct thread *old, struct thread *new) __dead2;
|
|
void unsleep(struct thread *);
|
|
void userret(struct thread *, struct trapframe *, u_int);
|
|
|
|
void cpu_exit(struct thread *);
|
|
void exit1(struct thread *, int) __dead2;
|
|
void cpu_fork(struct thread *, struct proc *, struct thread *, int);
|
|
void cpu_set_fork_handler(struct thread *, void (*)(void *), void *);
|
|
|
|
/* New in KSE. */
|
|
struct ksegrp *ksegrp_alloc(void);
|
|
void ksegrp_free(struct ksegrp *kg);
|
|
void ksegrp_stash(struct ksegrp *kg);
|
|
struct kse *kse_alloc(void);
|
|
void kse_free(struct kse *ke);
|
|
void kse_stash(struct kse *ke);
|
|
void cpu_set_upcall(struct thread *td, struct thread *td0);
|
|
void cpu_set_upcall_kse(struct thread *td, struct kse_upcall *ku);
|
|
void cpu_thread_clean(struct thread *);
|
|
void cpu_thread_exit(struct thread *);
|
|
void cpu_thread_setup(struct thread *td);
|
|
void cpu_thread_siginfo(int sig, u_long code, siginfo_t *si);
|
|
void cpu_thread_swapin(struct thread *);
|
|
void cpu_thread_swapout(struct thread *);
|
|
void kse_reassign(struct kse *ke);
|
|
void kse_link(struct kse *ke, struct ksegrp *kg);
|
|
void kse_unlink(struct kse *ke);
|
|
void ksegrp_link(struct ksegrp *kg, struct proc *p);
|
|
void ksegrp_unlink(struct ksegrp *kg);
|
|
void thread_signal_add(struct thread *td, int sig);
|
|
struct thread *thread_alloc(void);
|
|
void thread_exit(void) __dead2;
|
|
int thread_export_context(struct thread *td, int willexit);
|
|
void thread_free(struct thread *td);
|
|
void thread_link(struct thread *td, struct ksegrp *kg);
|
|
void thread_reap(void);
|
|
struct thread *thread_schedule_upcall(struct thread *td, struct kse_upcall *ku);
|
|
int thread_single(int how);
|
|
void thread_single_end(void);
|
|
int thread_sleep_check(struct thread *td);
|
|
void thread_stash(struct thread *td);
|
|
int thread_suspend_check(int how);
|
|
void thread_suspend_one(struct thread *td);
|
|
void thread_unlink(struct thread *td);
|
|
void thread_unsuspend(struct proc *p);
|
|
void thread_unsuspend_one(struct thread *td);
|
|
int thread_userret(struct thread *td, struct trapframe *frame);
|
|
int thread_upcall_check(struct thread *td);
|
|
void thread_user_enter(struct proc *p, struct thread *td);
|
|
void thread_wait(struct proc *p);
|
|
int thread_statclock(int user);
|
|
struct kse_upcall *upcall_alloc(void);
|
|
void upcall_free(struct kse_upcall *ku);
|
|
void upcall_link(struct kse_upcall *ku, struct ksegrp *kg);
|
|
void upcall_unlink(struct kse_upcall *ku);
|
|
void upcall_remove(struct thread *td);
|
|
void upcall_stash(struct kse_upcall *ke);
|
|
void thread_sanity_check(struct thread *td, char *);
|
|
void thread_stopped(struct proc *p);
|
|
void thread_switchout(struct thread *td);
|
|
void thread_continued(struct proc *p);
|
|
void thr_exit1(void);
|
|
#endif /* _KERNEL */
|
|
|
|
#endif /* !_SYS_PROC_H_ */
|