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 1.119 2008/06/13 00:25:01 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/thread.h>
  65 #include <sys/varsym.h>
  66 #include <sys/upcall.h>
  67 #include <sys/resourcevar.h>
  68 #ifdef _KERNEL
  69 #include <sys/globaldata.h>
  70 #endif
  71 #include <sys/systimer.h>
  72 #include <sys/usched.h>
  73 #include <machine/proc.h>               /* Machine-dependent proc substruct. */
  74 #include <machine/atomic.h>             /* Machine-dependent proc substruct. */
  75 #include <sys/signalvar.h>
  76
  77 LIST_HEAD(proclist, proc);
  78 LIST_HEAD(lwplist, lwp);
  79
  80 struct lwp_rb_tree;
  81 RB_HEAD(lwp_rb_tree, lwp);
  82 RB_PROTOTYPE2(lwp_rb_tree, lwp, u.lwp_rbnode, rb_lwp_compare, lwpid_t);
  83
  84 /*
  85  * One structure allocated per session.
  86  */
  87 struct  session {
  88         int     s_count;                /* Ref cnt; pgrps in session. */
  89         struct  proc *s_leader;         /* Session leader. */
  90         struct  vnode *s_ttyvp;         /* Vnode of controlling terminal. */
  91         struct  tty *s_ttyp;            /* Controlling terminal. */
  92         pid_t   s_sid;                  /* Session ID */
  93         char    s_login[roundup(MAXLOGNAME, sizeof(long))];     /* Setlogin() name. */
  94 };
  95
  96 /*
  97  * One structure allocated per process group.
  98  */
  99 struct  pgrp {
 100         LIST_ENTRY(pgrp) pg_hash;       /* Hash chain. */
 101         struct proclist pg_members;     /* Pointer to pgrp members. */
 102         struct  session *pg_session;    /* Pointer to session. */
 103         struct  sigiolst pg_sigiolst;   /* List of sigio sources. */
 104         pid_t   pg_id;                  /* Pgrp id. */
 105         int     pg_jobc;        /* # procs qualifying pgrp for job control */
 106         struct lock pg_lock;            /* Lock during fork */
 107 };
 108
 109 #define PS_NOCLDWAIT    0x0001  /* No zombies if child dies */
 110 #define PS_NOCLDSTOP    0x0002  /* No SIGCHLD when children stop. */
 111
 112 /*
 113  * pargs, used to hold a copy of the command line, if it had a sane
 114  * length
 115  */
 116 struct  pargs {
 117         u_int   ar_ref;         /* Reference count */
 118         u_int   ar_length;      /* Length */
 119         u_char  ar_args[0];     /* Arguments */
 120 };
 121
 122 /*
 123  * Description of a process.
 124  *
 125  * This structure contains the information needed to manage a thread of
 126  * control, known in UN*X as a process; it has references to substructures
 127  * containing descriptions of things that the process uses, but may share
 128  * with related processes.  The process structure and the substructures
 129  * are always addressable except for those marked "(PROC ONLY)" below,
 130  * which might be addressable only on a processor on which the process
 131  * is running.
 132  *
 133  * NOTE!  The process start time is stored in the thread structure associated
 134  * with the process.  If the process is a Zombie, then this field will be
 135  * inaccessible due to the thread structure being free'd in kern_wait1().
 136  */
 137
 138 struct jail;
 139 struct vkernel_proc;
 140 struct vkernel_lwp;
 141 struct vmspace_entry;
 142 struct ktrace_node;
 143
 144 enum lwpstat {
 145         LSRUN = 1,
 146         LSSTOP = 2,
 147         LSSLEEP = 3,
 148 };
 149
 150 enum procstat {
 151         SIDL = 1,
 152         SACTIVE = 2,
 153         SSTOP = 3,
 154         SZOMB = 4,
 155 };
 156
 157 struct lwp {
 158         TAILQ_ENTRY(lwp) lwp_procq;     /* run/sleep queue. */
 159         union {
 160             RB_ENTRY(lwp)       lwp_rbnode;     /* RB tree node - lwp in proc */
 161             LIST_ENTRY(lwp)     lwp_reap_entry; /* reaper list */
 162         } u;
 163
 164         struct proc     *lwp_proc;      /* Link to our proc. */
 165         struct vmspace  *lwp_vmspace;   /* Inherited from p_vmspace */
 166         struct vkernel_lwp *lwp_vkernel;/* VKernel support, lwp part */
 167
 168         lwpid_t         lwp_tid;        /* Our thread id . */
 169
 170         int             lwp_flag;       /* LWP_* flags. */
 171         enum lwpstat    lwp_stat;       /* LS* lwp status. */
 172         int             lwp_lock;       /* lwp lock (prevent destruct) count */
 173
 174         int             lwp_dupfd;      /* Sideways return value from fdopen. XXX */
 175
 176         /*
 177          * The following two fields are marked XXX since (at least) the
 178          * 4.4BSD-Lite2 import.  I can only guess the reason:  It is ugly.
 179          * These fields are used to pass the trap code from trapsignal() to
 180          * postsig(), which gets called later from userret().
 181          *
 182          * The correct "fix" for these XXX is to convert our signal system
 183          * to use signal queues, where each signal can carry its own meta
 184          * data.
 185          */
 186         int             lwp_sig;        /* for core dump/debugger XXX */
 187         u_long          lwp_code;       /* for core dump/debugger XXX */
 188
 189         /*
 190          * Scheduling.
 191          */
 192         sysclock_t      lwp_cpticks;    /* cpu used in sched clock ticks */
 193         sysclock_t      lwp_cpbase;     /* Measurement base */
 194         fixpt_t         lwp_pctcpu;     /* %cpu for this process */
 195         u_int           lwp_slptime;    /* Time since last blocked. */
 196
 197         int             lwp_traceflag;  /* Kernel trace points. */
 198
 199         struct rusage   lwp_ru;         /* stats for this lwp */
 200
 201         union usched_data lwp_usdata;   /* User scheduler specific */
 202
 203 #define lwp_startcopy   lwp_cpumask
 204         cpumask_t       lwp_cpumask;
 205         sigset_t        lwp_siglist;    /* Signals arrived but not delivered. */
 206         sigset_t        lwp_oldsigmask; /* saved mask from before sigpause */
 207         sigset_t        lwp_sigmask;    /* Current signal mask. */
 208         stack_t         lwp_sigstk;     /* sp & on stack state variable */
 209
 210         struct rtprio   lwp_rtprio;     /* Realtime priority. */
 211 #define lwp_endcopy     lwp_md
 212
 213         struct mdproc   lwp_md;         /* Any machine-dependent fields. */
 214
 215         struct thread   *lwp_thread;    /* backpointer to proc's thread */
 216         struct upcall   *lwp_upcall;    /* REGISTERED USERLAND POINTER! */
 217 };
 218
 219 struct  proc {
 220         LIST_ENTRY(proc) p_list;        /* List of all processes. */
 221
 222         /* substructures: */
 223         struct ucred    *p_ucred;       /* Process owner's identity. */
 224         struct filedesc *p_fd;          /* Ptr to open files structure. */
 225         struct filedesc_to_leader *p_fdtol; /* Ptr to tracking node XXX lwp */
 226         struct plimit   *p_limit;       /* Process limits. */
 227         struct pstats   *p_stats;
 228         void            *p_pad0;
 229         struct sigacts  *p_sigacts;
 230 #define p_sigignore     p_sigacts->ps_sigignore
 231 #define p_sigcatch      p_sigacts->ps_sigcatch
 232 #define p_rlimit        p_limit->pl_rlimit
 233
 234         int             p_flag;         /* P_* flags. */
 235         enum procstat   p_stat;         /* S* process status. */
 236         char            p_pad1[3];
 237
 238         pid_t           p_pid;          /* Process identifier. */
 239         LIST_ENTRY(proc) p_hash;        /* Hash chain. */
 240         LIST_ENTRY(proc) p_pglist;      /* List of processes in pgrp. */
 241         struct proc     *p_pptr;        /* Pointer to parent process. */
 242         LIST_ENTRY(proc) p_sibling;     /* List of sibling processes. */
 243         struct proclist p_children;     /* Pointer to list of children. */
 244         struct callout  p_ithandle;     /* for scheduling p_realtimer */
 245         struct varsymset p_varsymset;
 246
 247         pid_t           p_oppid;        /* Save parent pid during ptrace. XXX */
 248
 249         struct vmspace  *p_vmspace;     /* Current address space. */
 250
 251         unsigned int    p_swtime;       /* Time swapped in or out */
 252
 253         struct itimerval p_realtimer;   /* Alarm timer. */
 254         struct itimerval p_timer[3];    /* Virtual-time timers. */
 255
 256         int             p_traceflag;    /* Kernel trace points. */
 257         struct ktrace_node *p_tracenode; /* Trace to vnode. */
 258
 259         sigset_t        p_siglist;      /* Signals arrived but not delivered. */
 260
 261         struct vnode    *p_textvp;      /* Vnode of executable. */
 262
 263         unsigned int    p_stops;        /* procfs event bitmask */
 264         unsigned int    p_stype;        /* procfs stop event type */
 265         char            p_step;         /* procfs stop *once* flag */
 266         unsigned char   p_pfsflags;     /* procfs flags */
 267         char            p_pad2[2];      /* padding for alignment */
 268         struct          sigiolst p_sigiolst;    /* list of sigio sources */
 269         int             p_sigparent;    /* signal to parent on exit */
 270         struct klist    p_klist;        /* knotes attached to this process */
 271
 272         struct timeval  p_start;        /* start time for a process */
 273
 274         struct rusage   p_ru;           /* stats for this proc */
 275         struct rusage   p_cru;          /* sum of stats for reaped children */
 276
 277 /* The following fields are all copied upon creation in fork. */
 278 #define p_startcopy     p_comm
 279
 280         char            p_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */
 281         char            p_lock;         /* Process lock (prevent destruct) count. */
 282         char            p_nice;         /* Process "nice" value. */
 283         char            p_pad3;
 284
 285         struct pgrp     *p_pgrp;        /* Pointer to process group. */
 286
 287         struct sysentvec *p_sysent;     /* System call dispatch information. */
 288
 289         struct uprof    p_prof;         /* Profiling arguments. */
 290         struct rtprio   p_rtprio;       /* Realtime priority. */
 291         struct pargs    *p_args;
 292 /* End area that is copied on creation. */
 293 #define p_endcopy       p_xstat
 294
 295         u_short         p_xstat;        /* Exit status or last stop signal */
 296         u_short         p_acflag;       /* Accounting flags. */
 297
 298         int             p_nthreads;     /* Number of threads in this process. */
 299         int             p_nstopped;     /* Number of stopped threads. */
 300         int             p_lasttid;      /* Last tid used. */
 301         struct lwp_rb_tree p_lwp_tree;  /* RB tree of LWPs for this process */
 302         void            *p_aioinfo;     /* ASYNC I/O info */
 303         int             p_wakeup;       /* thread id XXX lwp */
 304         struct proc     *p_peers;       /* XXX lwp */
 305         struct proc     *p_leader;      /* XXX lwp */
 306         void            *p_emuldata;    /* process-specific emulator state */
 307         struct usched   *p_usched;      /* Userland scheduling control */
 308         struct vkernel_proc *p_vkernel; /* VKernel support, proc part */
 309         int             p_numposixlocks; /* number of POSIX locks */
 310
 311         struct spinlock p_spin;         /* Spinlock for LWP access to proc */
 312 };
 313
 314 #define lwp_wchan       lwp_thread->td_wchan
 315 #define lwp_wmesg       lwp_thread->td_wmesg
 316 #define p_session       p_pgrp->pg_session
 317 #define p_pgid          p_pgrp->pg_id
 318
 319 /* These flags are kept in p_flags. */
 320 #define P_ADVLOCK       0x00001 /* Process may hold a POSIX advisory lock. */
 321 #define P_CONTROLT      0x00002 /* Has a controlling terminal. */
 322 #define P_SWAPPEDOUT    0x00004 /* Swapped out of memory */
 323 #define P_UNUSED3       0x00008 /* was: Event pending, break tsleep on sigcont */
 324 #define P_PPWAIT        0x00010 /* Parent is waiting for child to exec/exit. */
 325 #define P_PROFIL        0x00020 /* Has started profiling. */
 326 #define P_UNUSED5       0x00040 /* was: Selecting; wakeup/waiting danger. */
 327 #define P_UNUSED4       0x00080 /* was: Sleep is interruptible. */
 328 #define P_SUGID         0x00100 /* Had set id privileges since last exec. */
 329 #define P_SYSTEM        0x00200 /* System proc: no sigs, stats or swapping. */
 330 #define P_UNUSED2       0x00400 /* was: SIGSTOP status */
 331 #define P_TRACED        0x00800 /* Debugged process being traced. */
 332 #define P_WAITED        0x01000 /* SIGSTOP status was returned by wait3/4 */
 333 #define P_WEXIT         0x02000 /* Working on exiting (master exit) */
 334 #define P_EXEC          0x04000 /* Process called exec. */
 335 #define P_CONTINUED     0x08000 /* Proc has continued from a stopped state. */
 336
 337 /* Should probably be changed into a hold count. */
 338 /* was  P_NOSWAP        0x08000 was: Do not swap upages; p->p_hold */
 339 #define P_MAILBOX       0x10000 /* Possible mailbox signal pending */
 340
 341 #define P_UPCALLPEND    0x20000 /* an upcall is pending */
 342
 343 #define P_SWAPWAIT      0x40000 /* Waiting for a swapin */
 344 #define P_UNUSED6       0x80000 /* was: Now in a zombied state */
 345
 346 /* Marked a kernel thread */
 347 #define P_UNUSED07      0x100000 /* was: on a user scheduling run queue */
 348 #define P_KTHREADP      0x200000 /* Process is really a kernel thread */
 349 #define P_IDLESWAP      0x400000 /* Swapout was due to idleswap, not load */
 350 #define P_DEADLKTREAT   0x800000 /* lock aquisition - deadlock treatment */
 351
 352 #define P_JAILED        0x1000000 /* Process is in jail */
 353 #define P_UNUSED0       0x2000000 /* need to restore mask before pause */
 354 #define P_UNUSED1       0x4000000 /* have alternate signal stack */
 355 #define P_INEXEC        0x8000000 /* Process is in execve(). */
 356 #define P_PASSIVE_ACQ   0x10000000 /* Passive acquire cpu (see kern_switch) */
 357 #define P_UPCALLWAIT    0x20000000 /* Wait for upcall or signal */
 358 #define P_XCPU          0x40000000 /* SIGXCPU */
 359
 360 /*
 361  * LWP_WSTOP: When set the thread will stop prior to return to userland
 362  *            and has been counted in the process stop-threads-count, but
 363  *            may still be running in kernel-land.
 364  *
 365  * LWP_WEXIT: When set the thread has been asked to exit and will not return
 366  *            to userland.  p_nthreads will not be decremented until the
 367  *            thread has actually exited.
 368  */
 369 #define LWP_ALTSTACK    0x0000001 /* have alternate signal stack */
 370 #define LWP_OLDMASK     0x0000002 /* need to restore mask before pause */
 371 #define LWP_BREAKTSLEEP 0x0000004 /* Event pending, break tsleep on sigcont */
 372 #define LWP_SINTR       0x0000008 /* Sleep is interruptible. */
 373 #define LWP_SELECT      0x0000010 /* Selecting; wakeup/waiting danger. */
 374 #define LWP_ONRUNQ      0x0000020 /* on a user scheduling run queue */
 375 #define LWP_WEXIT       0x0000040 /* working on exiting */
 376 #define LWP_WSTOP       0x0000080 /* working on stopping */
 377
 378 #define FIRST_LWP_IN_PROC(p)            RB_FIRST(lwp_rb_tree, &(p)->p_lwp_tree)
 379 #define FOREACH_LWP_IN_PROC(lp, p)      \
 380         RB_FOREACH(lp, lwp_rb_tree, &(p)->p_lwp_tree)
 381 #define ONLY_LWP_IN_PROC(p)             \
 382         (p->p_nthreads != 1 &&          \
 383         (panic("%s: proc %p (pid %d cmd %s) has more than one thread",  \
 384                __func__, p, p->p_pid, p->p_comm), 1),   \
 385         RB_ROOT(&p->p_lwp_tree))
 386
 387 /*
 388  * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
 389  * as it is used to represent "no process group".
 390  */
 391 #define PID_MAX         99999
 392 #define NO_PID          100000
 393
 394 #define SESS_LEADER(p)  ((p)->p_session->s_leader == (p))
 395
 396 #ifdef _KERNEL
 397
 398 #ifdef MALLOC_DECLARE
 399 MALLOC_DECLARE(M_SESSION);
 400 MALLOC_DECLARE(M_PROC);
 401 MALLOC_DECLARE(M_LWP);
 402 MALLOC_DECLARE(M_SUBPROC);
 403 MALLOC_DECLARE(M_PARGS);
 404 #endif
 405
 406 /* flags for suser_xxx() */
 407 #define PRISON_ROOT     0x1
 408 #define NULL_CRED_OKAY  0x2
 409
 410 /* Handy macro to determine if p1 can mangle p2 */
 411
 412 #define PRISON_CHECK(cr1, cr2) \
 413         ((!(cr1)->cr_prison) || (cr1)->cr_prison == (cr2)->cr_prison)
 414
 415 /*
 416  * STOPEVENT
 417  */
 418 extern void stopevent(struct proc*, unsigned int, unsigned int);
 419 #define STOPEVENT(p,e,v)                        \
 420         do {                                    \
 421                 if ((p)->p_stops & (e)) {       \
 422                         stopevent(p,e,v);       \
 423                 }                               \
 424         } while (0)
 425
 426 /* hold process in memory, don't destruct , normally for ptrace/procfs work */
 427 #define PHOLD(p)        (++(p)->p_lock)
 428 #define PRELE(p)        (--(p)->p_lock)
 429
 430 /* hold lwp in memory, don't destruct , normally for ptrace/procfs work */
 431 /* atomic ops because they can occur from an IPI */
 432 #define LWPHOLD(lp)     atomic_add_int(&(lp)->lwp_lock, 1)
 433 #define LWPRELE(lp)     atomic_add_int(&(lp)->lwp_lock, -1)
 434
 435 #define PIDHASH(pid)    (&pidhashtbl[(pid) & pidhash])
 436 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
 437 extern u_long pidhash;
 438
 439 #define PGRPHASH(pgid)  (&pgrphashtbl[(pgid) & pgrphash])
 440 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
 441 extern u_long pgrphash;
 442
 443 #if 0
 444 #ifndef SET_CURPROC
 445 #define SET_CURPROC(p)  (curproc = (p))
 446 #endif
 447 #endif
 448
 449 extern struct proc proc0;               /* Process slot for swapper. */
 450 extern struct lwp lwp0;                 /* LWP slot for swapper. */
 451 extern struct thread thread0;           /* Thread slot for swapper. */
 452 extern int hogticks;                    /* Limit on kernel cpu hogs. */
 453 extern int nprocs, maxproc;             /* Current and max number of procs. */
 454 extern int maxprocperuid;               /* Max procs per uid. */
 455 extern int sched_quantum;               /* Scheduling quantum in ticks */
 456
 457 extern struct proclist allproc;         /* List of all processes. */
 458 extern struct proclist zombproc;        /* List of zombie processes. */
 459 extern struct proc *initproc;           /* Process slot for init */
 460 extern struct thread *pagethread, *updatethread;
 461
 462 /*
 463  * Scheduler independant variables.  The primary scheduler polling frequency,
 464  * the maximum ESTCPU value, and the weighting factor for nice values.  A
 465  * cpu bound program's estcpu will increase to ESTCPUMAX - 1.
 466  */
 467 #define ESTCPUFREQ      50
 468
 469 extern  u_long ps_arg_cache_limit;
 470 extern  int ps_argsopen;
 471 extern  int ps_showallprocs;
 472
 473 struct proc *pfind (pid_t);     /* Find process by id. */
 474 struct pgrp *pgfind (pid_t);    /* Find process group by id. */
 475 struct proc *zpfind (pid_t);    /* Find zombie process by id. */
 476
 477 struct globaldata;
 478 struct lwp_params;
 479
 480 int     enterpgrp (struct proc *p, pid_t pgid, int mksess);
 481 void    proc_add_allproc(struct proc *p);
 482 void    proc_move_allproc_zombie(struct proc *);
 483 void    proc_remove_zombie(struct proc *);
 484 void    allproc_scan(int (*callback)(struct proc *, void *), void *data);
 485 void    alllwp_scan(int (*callback)(struct lwp *, void *), void *data);
 486 void    zombproc_scan(int (*callback)(struct proc *, void *), void *data);
 487 void    fixjobc (struct proc *p, struct pgrp *pgrp, int entering);
 488 void    updatepcpu(struct lwp *, int, int);
 489 int     inferior (struct proc *p);
 490 int     leavepgrp (struct proc *p);
 491 void    sess_hold(struct session *sp);
 492 void    sess_rele(struct session *sp);
 493 void    procinit (void);
 494 void    relscurproc(struct proc *curp);
 495 int     p_trespass (struct ucred *cr1, struct ucred *cr2);
 496 void    setrunnable (struct lwp *);
 497 void    proc_stop (struct proc *);
 498 void    proc_unstop (struct proc *);
 499 void    sleep_gdinit (struct globaldata *);
 500 int     suser (struct thread *td);
 501 int     suser_cred (struct ucred *cred, int flag);
 502 void    cpu_heavy_switch (struct thread *);
 503 void    cpu_lwkt_switch (struct thread *);
 504
 505 void    cpu_lwp_exit (void) __dead2;
 506 void    cpu_thread_exit (void) __dead2;
 507 void    lwp_exit (int masterexit) __dead2;
 508 void    lwp_dispose (struct lwp *);
 509 int     killalllwps (int);
 510 void    exit1 (int) __dead2;
 511 void    cpu_fork (struct lwp *, struct lwp *, int);
 512 int     cpu_prepare_lwp(struct lwp *, struct lwp_params *);
 513 void    cpu_set_fork_handler (struct lwp *, void (*)(void *, struct trapframe *), void *);
 514 void    cpu_set_thread_handler(struct thread *td, void (*retfunc)(void), void *func, void *arg);
 515 int     fork1 (struct lwp *, int, struct proc **);
 516 void    start_forked_proc (struct lwp *, struct proc *);
 517 int     trace_req (struct proc *);
 518 void    cpu_proc_wait (struct proc *);
 519 void    cpu_thread_wait (struct thread *);
 520 void    setsugid (void);
 521 void    faultin (struct proc *p);
 522 void    swapin_request (void);
 523
 524 u_int32_t       procrunnable (void);
 525
 526 #endif  /* _KERNEL */
 527
 528 #endif  /* _KERNEL || _KERNEL_STRUCTURES */
 529 #endif  /* !_SYS_PROC_H_ */