sys/sys/proc.h

   1 /*-
   2  * Copyright (c) 1986, 1989, 1991, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  * (c) UNIX System Laboratories, Inc.
   5  * All or some portions of this file are derived from material licensed
   6  * to the University of California by American Telephone and Telegraph
   7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
   8  * the permission of UNIX System Laboratories, Inc.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *      This product includes software developed by the University of
  21  *      California, Berkeley and its contributors.
  22  * 4. Neither the name of the University nor the names of its contributors
  23  *    may be used to endorse or promote products derived from this software
  24  *    without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  36  * SUCH DAMAGE.
  37  *
  38  *      @(#)proc.h      8.15 (Berkeley) 5/19/95
  39  * $FreeBSD: src/sys/sys/proc.h,v 1.99.2.9 2003/06/06 20:21:32 tegge Exp $
  40  * $DragonFly: src/sys/sys/proc.h,v 1.121 2008/07/23 17:22:33 dillon Exp $
  41  */
  42
  43 #ifndef _SYS_PROC_H_
  44 #define _SYS_PROC_H_
  45
  46 #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES)
  47
  48 #error "Userland must include sys/user.h instead of sys/proc.h"
  49
  50 #else
  51
  52 #include <sys/callout.h>                /* For struct callout_handle. */
  53 #include <sys/filedesc.h>
  54 #include <sys/queue.h>
  55 #include <sys/tree.h>
  56 #include <sys/rtprio.h>                 /* For struct rtprio. */
  57 #include <sys/signal.h>
  58 #include <sys/lock.h>
  59 #ifndef _KERNEL
  60 #include <sys/time.h>                   /* For structs itimerval, timeval. */
  61 #endif
  62 #include <sys/ucred.h>
  63 #include <sys/event.h>                  /* For struct klist */
  64 #include <sys/sysent.h>                 /* For struct sysentvec */
  65 #include <sys/thread.h>
  66 #include <sys/varsym.h>
  67 #include <sys/upcall.h>
  68 #include <sys/resourcevar.h>
  69 #ifdef _KERNEL
  70 #include <sys/globaldata.h>
  71 #endif
  72 #include <sys/systimer.h>
  73 #include <sys/iosched.h>
  74 #include <sys/usched.h>
  75 #include <machine/proc.h>               /* Machine-dependent proc substruct. */
  76 #include <machine/atomic.h>             /* Machine-dependent proc substruct. */
  77 #include <sys/signalvar.h>
  78
  79 LIST_HEAD(proclist, proc);
  80 LIST_HEAD(lwplist, lwp);
  81
  82 struct lwp_rb_tree;
  83 RB_HEAD(lwp_rb_tree, lwp);
  84 RB_PROTOTYPE2(lwp_rb_tree, lwp, u.lwp_rbnode, rb_lwp_compare, lwpid_t);
  85
  86 /*
  87  * One structure allocated per session.
  88  */
  89 struct  session {
  90         int     s_count;                /* Ref cnt; pgrps in session. */
  91         struct  proc *s_leader;         /* Session leader. */
  92         struct  vnode *s_ttyvp;         /* Vnode of controlling terminal. */
  93         struct  tty *s_ttyp;            /* Controlling terminal. */
  94         pid_t   s_sid;                  /* Session ID */
  95         char    s_login[roundup(MAXLOGNAME, sizeof(long))];     /* Setlogin() name. */
  96 };
  97
  98 /*
  99  * One structure allocated per process group.
 100  */
 101 struct  pgrp {
 102         LIST_ENTRY(pgrp) pg_hash;       /* Hash chain. */
 103         struct proclist pg_members;     /* Pointer to pgrp members. */
 104         struct  session *pg_session;    /* Pointer to session. */
 105         struct  sigiolst pg_sigiolst;   /* List of sigio sources. */
 106         pid_t   pg_id;                  /* Pgrp id. */
 107         int     pg_jobc;        /* # procs qualifying pgrp for job control */
 108         struct lock pg_lock;            /* Lock during fork */
 109 };
 110
 111 #define PS_NOCLDWAIT    0x0001  /* No zombies if child dies */
 112 #define PS_NOCLDSTOP    0x0002  /* No SIGCHLD when children stop. */
 113
 114 /*
 115  * pargs, used to hold a copy of the command line, if it had a sane
 116  * length
 117  */
 118 struct  pargs {
 119         u_int   ar_ref;         /* Reference count */
 120         u_int   ar_length;      /* Length */
 121         u_char  ar_args[0];     /* Arguments */
 122 };
 123
 124 /*
 125  * Description of a process.
 126  *
 127  * This structure contains the information needed to manage a thread of
 128  * control, known in UN*X as a process; it has references to substructures
 129  * containing descriptions of things that the process uses, but may share
 130  * with related processes.  The process structure and the substructures
 131  * are always addressable except for those marked "(PROC ONLY)" below,
 132  * which might be addressable only on a processor on which the process
 133  * is running.
 134  *
 135  * NOTE!  The process start time is stored in the thread structure associated
 136  * with the process.  If the process is a Zombie, then this field will be
 137  * inaccessible due to the thread structure being free'd in kern_wait1().
 138  */
 139
 140 struct jail;
 141 struct vkernel_proc;
 142 struct vkernel_lwp;
 143 struct vmspace_entry;
 144 struct ktrace_node;
 145
 146 enum lwpstat {
 147         LSRUN = 1,
 148         LSSTOP = 2,
 149         LSSLEEP = 3,
 150 };
 151
 152 enum procstat {
 153         SIDL = 1,
 154         SACTIVE = 2,
 155         SSTOP = 3,
 156         SZOMB = 4,
 157 };
 158
 159 struct lwp {
 160         TAILQ_ENTRY(lwp) lwp_procq;     /* run/sleep queue. */
 161         union {
 162             RB_ENTRY(lwp)       lwp_rbnode;     /* RB tree node - lwp in proc */
 163             LIST_ENTRY(lwp)     lwp_reap_entry; /* reaper list */
 164         } u;
 165
 166         struct proc     *lwp_proc;      /* Link to our proc. */
 167         struct vmspace  *lwp_vmspace;   /* Inherited from p_vmspace */
 168         struct vkernel_lwp *lwp_vkernel;/* VKernel support, lwp part */
 169
 170         lwpid_t         lwp_tid;        /* Our thread id . */
 171
 172         int             lwp_flag;       /* LWP_* flags. */
 173         enum lwpstat    lwp_stat;       /* LS* lwp status. */
 174         int             lwp_lock;       /* lwp lock (prevent destruct) count */
 175
 176         int             lwp_dupfd;      /* Sideways return value from fdopen. XXX */
 177
 178         /*
 179          * The following two fields are marked XXX since (at least) the
 180          * 4.4BSD-Lite2 import.  I can only guess the reason:  It is ugly.
 181          * These fields are used to pass the trap code from trapsignal() to
 182          * postsig(), which gets called later from userret().
 183          *
 184          * The correct "fix" for these XXX is to convert our signal system
 185          * to use signal queues, where each signal can carry its own meta
 186          * data.
 187          */
 188         int             lwp_sig;        /* for core dump/debugger XXX */
 189         u_long          lwp_code;       /* for core dump/debugger XXX */
 190
 191         /*
 192          * Scheduling.
 193          */
 194         sysclock_t      lwp_cpticks;    /* cpu used in sched clock ticks */
 195         sysclock_t      lwp_cpbase;     /* Measurement base */
 196         fixpt_t         lwp_pctcpu;     /* %cpu for this process */
 197         u_int           lwp_slptime;    /* Time since last blocked. */
 198
 199         int             lwp_traceflag;  /* Kernel trace points. */
 200
 201         struct rusage   lwp_ru;         /* stats for this lwp */
 202
 203         union usched_data lwp_usdata;   /* User scheduler specific */
 204
 205 #define lwp_startcopy   lwp_cpumask
 206         cpumask_t       lwp_cpumask;
 207         sigset_t        lwp_siglist;    /* Signals arrived but not delivered. */
 208         sigset_t        lwp_oldsigmask; /* saved mask from before sigpause */
 209         sigset_t        lwp_sigmask;    /* Current signal mask. */
 210         stack_t         lwp_sigstk;     /* sp & on stack state variable */
 211
 212         struct rtprio   lwp_rtprio;     /* Realtime priority. */
 213 #define lwp_endcopy     lwp_md
 214
 215         struct mdproc   lwp_md;         /* Any machine-dependent fields. */
 216
 217         struct thread   *lwp_thread;    /* backpointer to proc's thread */
 218         struct upcall   *lwp_upcall;    /* REGISTERED USERLAND POINTER! */
 219 };
 220
 221 struct  proc {
 222         LIST_ENTRY(proc) p_list;        /* List of all processes. */
 223
 224         /* substructures: */
 225         struct ucred    *p_ucred;       /* Process owner's identity. */
 226         struct filedesc *p_fd;          /* Ptr to open files structure. */
 227         struct filedesc_to_leader *p_fdtol; /* Ptr to tracking node XXX lwp */
 228         struct plimit   *p_limit;       /* Process limits. */
 229         struct pstats   *p_stats;
 230         void            *p_pad0;
 231         struct sigacts  *p_sigacts;
 232 #define p_sigignore     p_sigacts->ps_sigignore
 233 #define p_sigcatch      p_sigacts->ps_sigcatch
 234 #define p_rlimit        p_limit->pl_rlimit
 235
 236         int             p_flag;         /* P_* flags. */
 237         enum procstat   p_stat;         /* S* process status. */
 238         char            p_pad1[3];
 239
 240         pid_t           p_pid;          /* Process identifier. */
 241         LIST_ENTRY(proc) p_hash;        /* Hash chain. */
 242         LIST_ENTRY(proc) p_pglist;      /* List of processes in pgrp. */
 243         struct proc     *p_pptr;        /* Pointer to parent process. */
 244         LIST_ENTRY(proc) p_sibling;     /* List of sibling processes. */
 245         struct proclist p_children;     /* Pointer to list of children. */
 246         struct callout  p_ithandle;     /* for scheduling p_realtimer */
 247         struct varsymset p_varsymset;
 248         struct iosched_data p_iosdata;  /* Dynamic I/O scheduling data */
 249
 250         pid_t           p_oppid;        /* Save parent pid during ptrace. XXX */
 251
 252         struct vmspace  *p_vmspace;     /* Current address space. */
 253
 254         unsigned int    p_swtime;       /* Time swapped in or out */
 255
 256         struct itimerval p_realtimer;   /* Alarm timer. */
 257         struct itimerval p_timer[3];    /* Virtual-time timers. */
 258
 259         int             p_traceflag;    /* Kernel trace points. */
 260         struct ktrace_node *p_tracenode; /* Trace to vnode. */
 261
 262         sigset_t        p_siglist;      /* Signals arrived but not delivered. */
 263
 264         struct vnode    *p_textvp;      /* Vnode of executable. */
 265
 266         unsigned int    p_stops;        /* procfs event bitmask */
 267         unsigned int    p_stype;        /* procfs stop event type */
 268         char            p_step;         /* procfs stop *once* flag */
 269         unsigned char   p_pfsflags;     /* procfs flags */
 270         char            p_pad2[2];      /* padding for alignment */
 271         struct          sigiolst p_sigiolst;    /* list of sigio sources */
 272         int             p_sigparent;    /* signal to parent on exit */
 273         struct klist    p_klist;        /* knotes attached to this process */
 274
 275         struct timeval  p_start;        /* start time for a process */
 276
 277         struct rusage   p_ru;           /* stats for this proc */
 278         struct rusage   p_cru;          /* sum of stats for reaped children */
 279
 280 /* The following fields are all copied upon creation in fork. */
 281 #define p_startcopy     p_comm
 282
 283         char            p_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */
 284         char            p_lock;         /* Process lock (prevent destruct) count. */
 285         char            p_nice;         /* Process "nice" value. */
 286         char            p_pad3;
 287
 288         struct pgrp     *p_pgrp;        /* Pointer to process group. */
 289
 290         struct sysentvec *p_sysent;     /* System call dispatch information. */
 291
 292         struct uprof    p_prof;         /* Profiling arguments. */
 293         struct rtprio   p_rtprio;       /* Realtime priority. */
 294         struct pargs    *p_args;
 295 /* End area that is copied on creation. */
 296 #define p_endcopy       p_xstat
 297
 298         u_short         p_xstat;        /* Exit status or last stop signal */
 299         u_short         p_acflag;       /* Accounting flags. */
 300
 301         int             p_nthreads;     /* Number of threads in this process. */
 302         int             p_nstopped;     /* Number of stopped threads. */
 303         int             p_lasttid;      /* Last tid used. */
 304         struct lwp_rb_tree p_lwp_tree;  /* RB tree of LWPs for this process */
 305         void            *p_aioinfo;     /* ASYNC I/O info */
 306         int             p_wakeup;       /* thread id XXX lwp */
 307         struct proc     *p_peers;       /* XXX lwp */
 308         struct proc     *p_leader;      /* XXX lwp */
 309         void            *p_emuldata;    /* process-specific emulator state */
 310         struct usched   *p_usched;      /* Userland scheduling control */
 311         struct vkernel_proc *p_vkernel; /* VKernel support, proc part */
 312         int             p_numposixlocks; /* number of POSIX locks */
 313
 314         struct spinlock p_spin;         /* Spinlock for LWP access to proc */
 315 };
 316
 317 #define lwp_wchan       lwp_thread->td_wchan
 318 #define lwp_wmesg       lwp_thread->td_wmesg
 319 #define p_session       p_pgrp->pg_session
 320 #define p_pgid          p_pgrp->pg_id
 321
 322 /* These flags are kept in p_flags. */
 323 #define P_ADVLOCK       0x00001 /* Process may hold a POSIX advisory lock. */
 324 #define P_CONTROLT      0x00002 /* Has a controlling terminal. */
 325 #define P_SWAPPEDOUT    0x00004 /* Swapped out of memory */
 326 #define P_UNUSED3       0x00008 /* was: Event pending, break tsleep on sigcont */
 327 #define P_PPWAIT        0x00010 /* Parent is waiting for child to exec/exit. */
 328 #define P_PROFIL        0x00020 /* Has started profiling. */
 329 #define P_UNUSED5       0x00040 /* was: Selecting; wakeup/waiting danger. */
 330 #define P_UNUSED4       0x00080 /* was: Sleep is interruptible. */
 331 #define P_SUGID         0x00100 /* Had set id privileges since last exec. */
 332 #define P_SYSTEM        0x00200 /* System proc: no sigs, stats or swapping. */
 333 #define P_UNUSED2       0x00400 /* was: SIGSTOP status */
 334 #define P_TRACED        0x00800 /* Debugged process being traced. */
 335 #define P_WAITED        0x01000 /* SIGSTOP status was returned by wait3/4 */
 336 #define P_WEXIT         0x02000 /* Working on exiting (master exit) */
 337 #define P_EXEC          0x04000 /* Process called exec. */
 338 #define P_CONTINUED     0x08000 /* Proc has continued from a stopped state. */
 339
 340 /* Should probably be changed into a hold count. */
 341 /* was  P_NOSWAP        0x08000 was: Do not swap upages; p->p_hold */
 342 #define P_MAILBOX       0x10000 /* Possible mailbox signal pending */
 343
 344 #define P_UPCALLPEND    0x20000 /* an upcall is pending */
 345
 346 #define P_SWAPWAIT      0x40000 /* Waiting for a swapin */
 347 #define P_UNUSED6       0x80000 /* was: Now in a zombied state */
 348
 349 /* Marked a kernel thread */
 350 #define P_UNUSED07      0x100000 /* was: on a user scheduling run queue */
 351 #define P_KTHREADP      0x200000 /* Process is really a kernel thread */
 352 #define P_IDLESWAP      0x400000 /* Swapout was due to idleswap, not load */
 353 #define P_DEADLKTREAT   0x800000 /* lock aquisition - deadlock treatment */
 354
 355 #define P_JAILED        0x1000000 /* Process is in jail */
 356 #define P_UNUSED0       0x2000000 /* need to restore mask before pause */
 357 #define P_UNUSED1       0x4000000 /* have alternate signal stack */
 358 #define P_INEXEC        0x8000000 /* Process is in execve(). */
 359 #define P_PASSIVE_ACQ   0x10000000 /* Passive acquire cpu (see kern_switch) */
 360 #define P_UPCALLWAIT    0x20000000 /* Wait for upcall or signal */
 361 #define P_XCPU          0x40000000 /* SIGXCPU */
 362
 363 /*
 364  * LWP_WSTOP: When set the thread will stop prior to return to userland
 365  *            and has been counted in the process stop-threads-count, but
 366  *            may still be running in kernel-land.
 367  *
 368  * LWP_WEXIT: When set the thread has been asked to exit and will not return
 369  *            to userland.  p_nthreads will not be decremented until the
 370  *            thread has actually exited.
 371  */
 372 #define LWP_ALTSTACK    0x0000001 /* have alternate signal stack */
 373 #define LWP_OLDMASK     0x0000002 /* need to restore mask before pause */
 374 #define LWP_BREAKTSLEEP 0x0000004 /* Event pending, break tsleep on sigcont */
 375 #define LWP_SINTR       0x0000008 /* Sleep is interruptible. */
 376 #define LWP_SELECT      0x0000010 /* Selecting; wakeup/waiting danger. */
 377 #define LWP_ONRUNQ      0x0000020 /* on a user scheduling run queue */
 378 #define LWP_WEXIT       0x0000040 /* working on exiting */
 379 #define LWP_WSTOP       0x0000080 /* working on stopping */
 380
 381 #define FIRST_LWP_IN_PROC(p)            RB_FIRST(lwp_rb_tree, &(p)->p_lwp_tree)
 382 #define FOREACH_LWP_IN_PROC(lp, p)      \
 383         RB_FOREACH(lp, lwp_rb_tree, &(p)->p_lwp_tree)
 384 #define ONLY_LWP_IN_PROC(p)             \
 385         (p->p_nthreads != 1 &&          \
 386         (panic("%s: proc %p (pid %d cmd %s) has more than one thread",  \
 387                __func__, p, p->p_pid, p->p_comm), 1),   \
 388         RB_ROOT(&p->p_lwp_tree))
 389
 390 /*
 391  * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
 392  * as it is used to represent "no process group".
 393  */
 394 #define PID_MAX         99999
 395 #define NO_PID          100000
 396
 397 #define SESS_LEADER(p)  ((p)->p_session->s_leader == (p))
 398
 399 #ifdef _KERNEL
 400
 401 #ifdef MALLOC_DECLARE
 402 MALLOC_DECLARE(M_SESSION);
 403 MALLOC_DECLARE(M_PROC);
 404 MALLOC_DECLARE(M_LWP);
 405 MALLOC_DECLARE(M_SUBPROC);
 406 MALLOC_DECLARE(M_PARGS);
 407 #endif
 408
 409 /* for priv_check_cred() */
 410 #define NULL_CRED_OKAY  0x2
 411
 412 /* Handy macro to determine if p1 can mangle p2 */
 413
 414 #define PRISON_CHECK(cr1, cr2) \
 415         ((!(cr1)->cr_prison) || (cr1)->cr_prison == (cr2)->cr_prison)
 416
 417 /*
 418  * STOPEVENT
 419  */
 420 extern void stopevent(struct proc*, unsigned int, unsigned int);
 421 #define STOPEVENT(p,e,v)                        \
 422         do {                                    \
 423                 if ((p)->p_stops & (e)) {       \
 424                         stopevent(p,e,v);       \
 425                 }                               \
 426         } while (0)
 427
 428 /* hold process in memory, don't destruct , normally for ptrace/procfs work */
 429 #define PHOLD(p)        (++(p)->p_lock)
 430 #define PRELE(p)        (--(p)->p_lock)
 431
 432 /* hold lwp in memory, don't destruct , normally for ptrace/procfs work */
 433 /* atomic ops because they can occur from an IPI */
 434 #define LWPHOLD(lp)     atomic_add_int(&(lp)->lwp_lock, 1)
 435 #define LWPRELE(lp)     atomic_add_int(&(lp)->lwp_lock, -1)
 436
 437 #define PIDHASH(pid)    (&pidhashtbl[(pid) & pidhash])
 438 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
 439 extern u_long pidhash;
 440
 441 #define PGRPHASH(pgid)  (&pgrphashtbl[(pgid) & pgrphash])
 442 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
 443 extern u_long pgrphash;
 444
 445 #if 0
 446 #ifndef SET_CURPROC
 447 #define SET_CURPROC(p)  (curproc = (p))
 448 #endif
 449 #endif
 450
 451 extern struct proc proc0;               /* Process slot for swapper. */
 452 extern struct lwp lwp0;                 /* LWP slot for swapper. */
 453 extern struct thread thread0;           /* Thread slot for swapper. */
 454 extern int hogticks;                    /* Limit on kernel cpu hogs. */
 455 extern int nprocs, maxproc;             /* Current and max number of procs. */
 456 extern int maxprocperuid;               /* Max procs per uid. */
 457 extern int sched_quantum;               /* Scheduling quantum in ticks */
 458
 459 extern struct proclist allproc;         /* List of all processes. */
 460 extern struct proclist zombproc;        /* List of zombie processes. */
 461 extern struct proc *initproc;           /* Process slot for init */
 462 extern struct thread *pagethread, *updatethread;
 463
 464 /*
 465  * Scheduler independant variables.  The primary scheduler polling frequency,
 466  * the maximum ESTCPU value, and the weighting factor for nice values.  A
 467  * cpu bound program's estcpu will increase to ESTCPUMAX - 1.
 468  */
 469 #define ESTCPUFREQ      50
 470
 471 extern  u_long ps_arg_cache_limit;
 472 extern  int ps_argsopen;
 473 extern  int ps_showallprocs;
 474
 475 struct proc *pfind (pid_t);     /* Find process by id. */
 476 struct pgrp *pgfind (pid_t);    /* Find process group by id. */
 477 struct proc *zpfind (pid_t);    /* Find zombie process by id. */
 478
 479 struct globaldata;
 480 struct lwp_params;
 481
 482 int     enterpgrp (struct proc *p, pid_t pgid, int mksess);
 483 void    proc_add_allproc(struct proc *p);
 484 void    proc_move_allproc_zombie(struct proc *);
 485 void    proc_remove_zombie(struct proc *);
 486 void    allproc_scan(int (*callback)(struct proc *, void *), void *data);
 487 void    alllwp_scan(int (*callback)(struct lwp *, void *), void *data);
 488 void    zombproc_scan(int (*callback)(struct proc *, void *), void *data);
 489 void    fixjobc (struct proc *p, struct pgrp *pgrp, int entering);
 490 void    updatepcpu(struct lwp *, int, int);
 491 int     inferior (struct proc *p);
 492 int     leavepgrp (struct proc *p);
 493 void    sess_hold(struct session *sp);
 494 void    sess_rele(struct session *sp);
 495 void    procinit (void);
 496 void    relscurproc(struct proc *curp);
 497 int     p_trespass (struct ucred *cr1, struct ucred *cr2);
 498 void    setrunnable (struct lwp *);
 499 void    proc_stop (struct proc *);
 500 void    proc_unstop (struct proc *);
 501 void    sleep_gdinit (struct globaldata *);
 502 int     suser (struct thread *td);
 503 int     suser_cred (struct ucred *cred, int flag);
 504 void    cpu_heavy_switch (struct thread *);
 505 void    cpu_lwkt_switch (struct thread *);
 506
 507 void    cpu_lwp_exit (void) __dead2;
 508 void    cpu_thread_exit (void) __dead2;
 509 void    lwp_exit (int masterexit) __dead2;
 510 void    lwp_dispose (struct lwp *);
 511 int     killalllwps (int);
 512 void    exit1 (int) __dead2;
 513 void    cpu_fork (struct lwp *, struct lwp *, int);
 514 int     cpu_prepare_lwp(struct lwp *, struct lwp_params *);
 515 void    cpu_set_fork_handler (struct lwp *, void (*)(void *, struct trapframe *), void *);
 516 void    cpu_set_thread_handler(struct thread *td, void (*retfunc)(void), void *func, void *arg);
 517 int     fork1 (struct lwp *, int, struct proc **);
 518 void    start_forked_proc (struct lwp *, struct proc *);
 519 int     trace_req (struct proc *);
 520 void    cpu_proc_wait (struct proc *);
 521 void    cpu_thread_wait (struct thread *);
 522 void    setsugid (void);
 523 void    faultin (struct proc *p);
 524 void    swapin_request (void);
 525
 526 u_int32_t       procrunnable (void);
 527
 528 #endif  /* _KERNEL */
 529
 530 #endif  /* _KERNEL || _KERNEL_STRUCTURES */
 531 #endif  /* !_SYS_PROC_H_ */