FreeBSD/Linux Kernel Cross Reference
sys/sys/proc.h

     /*-
      * Copyright (c) 1986, 1989, 1991, 1993
      *      The Regents of the University of California.  All rights reserved.
      * (c) UNIX System Laboratories, Inc.
      * All or some portions of this file are derived from material licensed
      * to the University of California by American Telephone and Telegraph
      * Co. or Unix System Laboratories, Inc. and are reproduced herein with
      * the permission of UNIX System Laboratories, Inc.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)proc.h      8.15 (Berkeley) 5/19/95
     * $FreeBSD: src/sys/sys/proc.h,v 1.99.2.9 2003/06/06 20:21:32 tegge Exp $
     */
    
    #ifndef _SYS_PROC_H_
    #define _SYS_PROC_H_
    
    #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES)
    
    #error "Userland must include sys/user.h instead of sys/proc.h"
    
    #else
    
    #include <sys/callout.h>                /* For struct callout_handle. */
    #include <sys/filedesc.h>
    #include <sys/queue.h>
    #include <sys/tree.h>
    #include <sys/rtprio.h>                 /* For struct rtprio. */
    #include <sys/signal.h>
    #include <sys/lock.h>
    #ifndef _KERNEL
    #include <sys/time.h>                   /* For structs itimerval, timeval. */
    #endif
    #include <sys/ucred.h>
    #include <sys/event.h>                  /* For struct klist */
    #include <sys/eventvar.h>
    #include <sys/sysent.h>                 /* For struct sysentvec */
    #include <sys/thread.h>
    #include <sys/varsym.h>
    #include <sys/resourcevar.h>
    #ifdef _KERNEL
    #include <sys/globaldata.h>
    #endif
    #include <sys/systimer.h>
    #include <sys/iosched.h>
    #include <sys/usched.h>
    #include <machine/proc.h>               /* Machine-dependent proc substruct. */
    #include <machine/atomic.h>             /* Machine-dependent proc substruct. */
    #include <sys/signalvar.h>
    
    struct proc;
    struct pgrp;
    struct session;
    struct lwp;
    
    LIST_HEAD(proclist, proc);
    LIST_HEAD(pgrplist, pgrp);
    LIST_HEAD(sesslist, session);
    LIST_HEAD(lwplist, lwp);
    
    struct lwp_rb_tree;
    RB_HEAD(lwp_rb_tree, lwp);
    RB_PROTOTYPE2(lwp_rb_tree, lwp, u.lwp_rbnode, rb_lwp_compare, lwpid_t);
    
    /*
     * One structure allocated per session.
     */
    struct  session {
            LIST_ENTRY(session) s_list;     /* Hash chain. */
            int     s_count;                /* Ref cnt; pgrps in session. */
            struct  proc *s_leader;         /* Session leader. */
            struct  vnode *s_ttyvp;         /* Vnode of controlling terminal. */
           struct  tty *s_ttyp;            /* Controlling terminal. */
           pid_t   s_sid;                  /* Session ID */
           char    s_login[roundup(MAXLOGNAME, sizeof(long))];     /* Setlogin() name. */
   };
   
   /*
    * One structure allocated per process group.
    */
   struct  pgrp {
           LIST_ENTRY(pgrp) pg_list;       /* Hash chain. */
           struct proclist pg_members;     /* Pointer to pgrp members. */
           struct  session *pg_session;    /* Pointer to session. */
           struct  sigiolst pg_sigiolst;   /* List of sigio sources. */
           pid_t   pg_id;                  /* Pgrp id. */
           int     pg_jobc;        /* # procs qualifying pgrp for job control */
           u_int   pg_refs;
           struct lwkt_token pg_token;
           struct lock pg_lock;
   };
   
   #define PS_NOCLDWAIT    0x0001  /* No zombies if child dies */
   #define PS_NOCLDSTOP    0x0002  /* No SIGCHLD when children stop. */
   #define PS_CLDSIGIGN    0x0004  /* The SIGCHLD handler is SIG_IGN. */
   
   /*
    * pargs, used to hold a copy of the command line, if it had a sane
    * length
    */
   struct  pargs {
           u_int   ar_ref;         /* Reference count */
           u_int   ar_length;      /* Length */
           u_char  ar_args[0];     /* Arguments */
   };
   
   /*
    * Description of a process.
    *
    * This structure contains the information needed to manage a thread of
    * 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 "(PROC ONLY)" below,
    * which might be addressable only on a processor on which the process
    * is running.
    *
    * NOTE!  The process start time is stored in the thread structure associated
    * with the process.  If the process is a Zombie, then this field will be
    * inaccessible due to the thread structure being free'd in kern_wait1().
    */
   
   struct jail;
   struct vkernel_proc;
   struct vkernel_lwp;
   struct vmspace_entry;
   struct ktrace_node;
   struct sem_undo;
   
   enum lwpstat {
           LSRUN = 1,
           LSSTOP = 2,
           LSSLEEP = 3,
   };
   
   enum procstat {
           SIDL = 1,
           SACTIVE = 2,
           SSTOP = 3,
           SZOMB = 4,
   };
   
   struct lwp {
           TAILQ_ENTRY(lwp) lwp_procq;     /* run/sleep queue. */
           union {
               RB_ENTRY(lwp)       lwp_rbnode;     /* RB tree node - lwp in proc */
               LIST_ENTRY(lwp)     lwp_reap_entry; /* reaper list */
           } u;
   
           struct proc     *lwp_proc;      /* Link to our proc. */
           struct vmspace  *lwp_vmspace;   /* Inherited from p_vmspace */
           struct vkernel_lwp *lwp_vkernel;/* VKernel support, lwp part */
   
           lwpid_t         lwp_tid;        /* Our thread id */
   
           u_int           lwp_flags;      /* LWP_*    flags */
           u_int           lwp_mpflags;    /* LWP_MP_* flags */
           enum lwpstat    lwp_stat;       /* LS* lwp status */
           int             lwp_lock;       /* lwp lock (prevent destruct) count */
   
           int             lwp_dupfd;      /* Sideways return value from fdopen */
   
           /*
            * The following two fields are marked XXX since (at least) the
            * 4.4BSD-Lite2 import.  I can only guess the reason:  It is ugly.
            * These fields are used to pass the trap code from trapsignal() to
            * postsig(), which gets called later from userret().
            *
            * The correct "fix" for these XXX is to convert our signal system
            * to use signal queues, where each signal can carry its own meta
            * data.
            */
           int             lwp_sig;        /* for core dump/debugger XXX */
           u_long          lwp_code;       /* for core dump/debugger XXX */
   
           /*
            * Scheduling.
            */
           sysclock_t      lwp_cpticks;    /* cpu used in sched clock ticks */
           sysclock_t      lwp_cpbase;     /* Measurement base */
           fixpt_t         lwp_pctcpu;     /* %cpu for this process */
           u_int           lwp_slptime;    /* Time since last blocked. */
           u_int           lwp_rebal_ticks; /* Timestamp sched on current cpu */
   
           int             lwp_traceflag;  /* Kernel trace points. */
   
           struct rusage   lwp_ru;         /* stats for this lwp */
   
           union usched_data lwp_usdata;   /* User scheduler specific */
   
   #define lwp_startcopy   lwp_cpumask
           cpumask_t       lwp_cpumask;
           sigset_t        lwp_siglist;    /* Signals arrived but not delivered. */
           sigset_t        lwp_oldsigmask; /* saved mask from before sigpause */
           sigset_t        lwp_sigmask;    /* Current signal mask. */
           stack_t         lwp_sigstk;     /* sp & on stack state variable */
   
           struct rtprio   lwp_rtprio;     /* Realtime priority. */
   #define lwp_endcopy     lwp_md
   
           struct mdproc   lwp_md;         /* Any machine-dependent fields. */
   
           struct thread   *lwp_thread;    /* backpointer to proc's thread */
           void            *lwp_unused01;  /* for future fields */
           struct kqueue   lwp_kqueue;     /* for select/poll */
           u_int           lwp_kqueue_serial;
           struct lwkt_token lwp_token;    /* per-lwp token for signal/state */
           struct spinlock lwp_spin;       /* spinlock for signal handling */
           void            *lwp_reserveds1; /* reserved for lwp_saveusp */
           void            *lwp_reserveds2; /* reserved for lwp_saveupc */
   };
   
   struct  proc {
           LIST_ENTRY(proc) p_list;        /* List of all processes. */
   
           /* substructures: */
           struct ucred    *p_ucred;       /* Process owner's identity. */
           struct filedesc *p_fd;          /* Ptr to open files structure. */
           struct filedesc_to_leader *p_fdtol; /* Ptr to tracking node XXX lwp */
           struct plimit   *p_limit;       /* Process limits. */
           struct pstats   *p_stats;
           u_int           p_mqueue_cnt;   /* Count of open mqueues. */
           long            p_waitgen;      /* wait interlock allows late signal */
           struct sigacts  *p_sigacts;
   #define p_sigignore     p_sigacts->ps_sigignore
   #define p_sigcatch      p_sigacts->ps_sigcatch
   #define p_rlimit        p_limit->pl_rlimit
   
           int             p_flags;        /* P_* flags. */
           enum procstat   p_stat;         /* S* process status. */
           char            p_pad1[3];
   
           pid_t           p_pid;          /* Process identifier. */
           LIST_ENTRY(proc) p_pglist;      /* List of processes in pgrp. */
           struct proc     *p_pptr;        /* Pointer to parent process. */
           LIST_ENTRY(proc) p_sibling;     /* List of sibling processes. */
           struct proclist p_children;     /* Pointer to list of children. */
           struct callout  p_ithandle;     /* for scheduling p_realtimer */
           struct varsymset p_varsymset;
           struct iosched_data p_iosdata;  /* Dynamic I/O scheduling data */
   
           pid_t           p_oppid;        /* Save parent pid during ptrace. XXX */
   
           struct vmspace  *p_vmspace;     /* Current address space. */
   
           unsigned int    p_swtime;       /* Time swapped in or out */
   
           struct itimerval p_realtimer;   /* Alarm timer. */
           struct itimerval p_timer[3];    /* Virtual-time timers. */
   
           int             p_traceflag;    /* Kernel trace points. */
           struct ktrace_node *p_tracenode; /* Trace to vnode. */
   
           sigset_t        p_siglist;      /* Signals arrived but not delivered. */
   
           struct vnode    *p_textvp;      /* Vnode of executable. */
           struct nchandle p_textnch;      /* namecache handle of executable. */
   
           unsigned int    p_stops;        /* procfs event bitmask */
           unsigned int    p_stype;        /* procfs stop event type */
           char            p_step;         /* procfs stop *once* flag */
           unsigned char   p_pfsflags;     /* procfs flags */
           char            p_pad2[2];
           struct          sigiolst p_sigiolst;    /* list of sigio sources */
           int             p_sigparent;    /* signal to parent on exit */
           struct klist    p_klist;        /* knotes attached to this process */
   
           struct timeval  p_start;        /* start time for a process */
   
           struct rusage   p_ru;           /* stats for this proc */
           struct rusage   p_cru;          /* sum of stats for reaped children */
           void            *p_dsched_priv1;
   
   /* The following fields are all copied upon creation in fork. */
   #define p_startcopy     p_comm
   
           char            p_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */
           char            p_pad3;
           char            p_nice;         /* Process "nice" value. */
           char            p_pad4;
           int             p_osrel;        /* release date for binary ELF note */
   
           struct pgrp     *p_pgrp;        /* Pointer to process group. */
   
           struct sysentvec *p_sysent;     /* System call dispatch information. */
   
           struct uprof    p_prof;         /* Profiling arguments. */
           struct rtprio   p_rtprio;       /* Realtime priority. */
           struct pargs    *p_args;
           u_short         p_xstat;        /* Exit status or last stop signal */
   
           int             p_ionice;
           void            *p_dsched_priv2;
   /* End area that is copied on creation. */
   #define p_endcopy       p_dsched_priv2
           u_short         p_acflag;       /* Accounting flags. */
   
           int             p_lock;         /* Prevent proc destruction */
           int             p_nthreads;     /* Number of threads in this process. */
           int             p_nstopped;     /* Number of stopped threads. */
           int             p_lasttid;      /* Last tid used. */
           struct lwp_rb_tree p_lwp_tree;  /* RB tree of LWPs for this process */
           void            *p_aioinfo;     /* ASYNC I/O info */
           int             p_wakeup;       /* thread id XXX lwp */
           struct proc     *p_peers;       /* XXX lwp */
           struct proc     *p_leader;      /* XXX lwp */
           void            *p_emuldata;    /* process-specific emulator state */
           struct usched   *p_usched;      /* Userland scheduling control */
           struct vkernel_proc *p_vkernel; /* VKernel support, proc part */
           int             p_numposixlocks; /* number of POSIX locks */
           void            (*p_userret)(void);/* p: return-to-user hook */
   
           struct spinlock p_spin;         /* Spinlock for LWP access to proc */
           struct lwkt_token p_token;      /* Token for LWP access to proc */
           struct sem_undo *p_sem_undo;    /* Fast semaphore tracking lookup */
           void            *p_drv_priv;    /* scp linkage (for syscons) */
           void            *p_vmm;
           cpumask_t       p_vmm_cpumask;
   };
   
   #define lwp_wchan       lwp_thread->td_wchan
   #define lwp_wmesg       lwp_thread->td_wmesg
   #define p_session       p_pgrp->pg_session
   #define p_pgid          p_pgrp->pg_id
   
   /* These flags are kept in p_flags. */
   #define P_ADVLOCK       0x00001 /* Process may hold a POSIX advisory lock */
   #define P_CONTROLT      0x00002 /* Has a controlling terminal */
   #define P_SWAPPEDOUT    0x00004 /* Swapped out of memory */
   #define P_SYSVSEM       0x00008 /* Might have SysV semaphores */
   #define P_PPWAIT        0x00010 /* Parent is waiting for child to exec/exit */
   #define P_PROFIL        0x00020 /* Has started profiling */
   #define P_POSTEXIT      0x00040 /* Prevent procfs from stepping after this pt */
   #define P_SCMOUSE       0x00080 /* Process is held by syscons ioctl */
                                   /* was: Sleep is interruptible */
   #define P_SUGID         0x00100 /* Had set id privileges since last exec */
   #define P_SYSTEM        0x00200 /* System proc: no sigs, stats or swapping */
   #define P_MAYBETHREADED 0x00400 /* might be threaded optimization */
   #define P_TRACED        0x00800 /* Debugged process being traced */
   #define P_WAITED        0x01000 /* SIGSTOP status was returned by wait3/4 */
   #define P_WEXIT         0x02000 /* Working on exiting (master exit) */
   #define P_EXEC          0x04000 /* Process called exec */
   #define P_CONTINUED     0x08000 /* Proc has continued from a stopped state */
   
   #define P_UNUSED16      0x00010000
   #define P_UNUSED17      0x00020000
   
   #define P_SWAPWAIT      0x00040000 /* Waiting for a swapin */
   #define P_UNUSED19      0x00080000 /* was: Now in a zombied state */
   
   /* Marked a kernel thread */
   #define P_UNUSED20      0x00100000 /* was: on a user scheduling run queue */
   #define P_KTHREADP      0x00200000 /* Process is really a kernel thread */
   #define P_IDLESWAP      0x00400000 /* Swapout was due to idleswap, not load */
   
   #define P_JAILED        0x01000000 /* Process is in jail */
   #define P_SIGVTALRM     0x02000000 /* signal SIGVTALRM pending due to itimer */
   #define P_SIGPROF       0x04000000 /* signal SIGPROF pending due to itimer */
   #define P_INEXEC        0x08000000 /* Process is in execve(). */
   #define P_UNUSED28      0x10000000
   #define P_UNUSED29      0x20000000
   #define P_XCPU          0x40000000 /* SIGXCPU */
   
   #define LWP_ALTSTACK    0x0000001 /* have alternate signal stack */
   #define LWP_OLDMASK     0x0000002 /* need to restore mask before pause */
   #define LWP_SINTR       0x0000008 /* Sleep is interruptible. */
   #define LWP_SELECT      0x0000010 /* Selecting; wakeup/waiting danger. */
   #define LWP_UNUSED20    0x0000020
   #define LWP_UNUSED40    0x0000040
   #define LWP_UNUSED80    0x0000080
   #define LWP_PASSIVE_ACQ 0x0000100 /* Passive acquire cpu (see kern_switch) */
   #define LWP_PAGING      0x0000200 /* Currently in vm_fault */
   
   /*
    * LWP_MP_WSTOP: When set the thread will stop prior to return to userland
    *            and has been counted in the process stop-threads-count, but
    *            may still be running in kernel-land.
    *
    * LWP_MP_WEXIT: When set the thread has been asked to exit and will not return
    *            to userland.  p_nthreads will not be decremented until the
    *            thread has actually exited.
    */
   #define LWP_MP_ONRUNQ   0x0000001 /* on a user scheduling run queue */
   #define LWP_MP_WEXIT    0x0000002 /* working on exiting (lwpuserret()) */
   #define LWP_MP_WSTOP    0x0000004 /* working on stopping */
   #define LWP_MP_ULOAD    0x0000008 /* uload accounting for current cpu */
   #define LWP_MP_RRFORCE  0x0000010 /* forced resched due to rrcount */
   #define LWP_MP_VNLRU    0x0000020 /* check excessive vnode allocations (lwpuserret()) */
   
   #define LWP_MP_URETMASK (LWP_MP_WEXIT | LWP_MP_VNLRU)
   
   #define FIRST_LWP_IN_PROC(p)            RB_FIRST(lwp_rb_tree, &(p)->p_lwp_tree)
   #define FOREACH_LWP_IN_PROC(lp, p)      \
           RB_FOREACH(lp, lwp_rb_tree, &(p)->p_lwp_tree)
   #define ONLY_LWP_IN_PROC(p)             _only_lwp_in_proc(p, __func__)
   
   #ifdef _KERNEL
   static inline struct lwp *
   _only_lwp_in_proc(struct proc *p, const char *caller)
   {
           if (p->p_nthreads != 1) {
                   panic("%s: proc %p (pid %d cmd %s) has more than one thread",
                       caller, p, p->p_pid, p->p_comm);
           }
           return RB_ROOT(&p->p_lwp_tree);
   }
   #endif
   
   /*
    * 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))
   
   #ifdef _KERNEL
   
   #ifdef MALLOC_DECLARE
   MALLOC_DECLARE(M_SESSION);
   MALLOC_DECLARE(M_PROC);
   MALLOC_DECLARE(M_LWP);
   MALLOC_DECLARE(M_SUBPROC);
   MALLOC_DECLARE(M_PARGS);
   #endif
   
   /* for priv_check_cred() */
   #define NULL_CRED_OKAY  0x2
   
   /* Handy macro to determine if p1 can mangle p2 */
   
   #define PRISON_CHECK(cr1, cr2) \
           ((!(cr1)->cr_prison) || (cr1)->cr_prison == (cr2)->cr_prison)
   
   /*
    * STOPEVENT
    */
   extern void stopevent(struct proc*, unsigned int, unsigned int);
   #define STOPEVENT(p,e,v)                        \
           do {                                    \
                   if ((p)->p_stops & (e)) {       \
                           stopevent(p,e,v);       \
                   }                               \
           } while (0)
   
   /*
    * Hold process in memory, don't destruct, used by ktrace, procfs, sigio,
    * and signaling code (e.g. ksignal()).
    *
    * MPSAFE
    */
   #define PHOLD(p)        phold((p))
   #define PRELE(p)        prele((p))
   #define PHOLDZOMB(p)    pholdzomb((p))
   #define PRELEZOMB(p)    prelezomb((p))
   #define PSTALL(p, msg, n) \
           do { if ((p)->p_lock > (n)) pstall((p), (msg), (n)); } while (0)
   
   /*
    * Hold lwp in memory, don't destruct, normally for ptrace/procfs work
    * atomic ops because they can occur from an IPI.
    * MPSAFE
    */
   #define LWPHOLD(lp)     atomic_add_int(&(lp)->lwp_lock, 1)
   #define LWPRELE(lp)     atomic_add_int(&(lp)->lwp_lock, -1)
   
   extern struct proc proc0;               /* Process slot for swapper. */
   extern struct lwp lwp0;                 /* LWP slot for swapper. */
   extern struct thread thread0;           /* Thread slot for swapper. */
   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 int sched_quantum;               /* Scheduling quantum in ticks */
   
   extern struct proc *initproc;           /* Process slot for init */
   extern struct thread *pagethread, *updatethread;
   
   /*
    * Scheduler independant variables.  The primary scheduler polling frequency,
    * the maximum ESTCPU value, and the weighting factor for nice values.  A
    * cpu bound program's estcpu will increase to ESTCPUMAX - 1.
    */
   #define ESTCPUFREQ      50
   
   extern  u_long ps_arg_cache_limit;
   extern  int ps_argsopen;
   extern  int ps_showallprocs;
   
   struct proc *pfind (pid_t);     /* Find process by id w/ref */
   struct proc *pfindn (pid_t);    /* Find process by id wo/ref */
   struct pgrp *pgfind (pid_t);    /* Find process group by id w/ref */
   struct proc *zpfind (pid_t);    /* Find zombie process by id w/ref */
   void pgref (struct pgrp *);     /* Ref pgrp preventing disposal */
   void pgrel (struct pgrp *);     /* Deref pgrp & dispose on 1->0 trans */
   
   struct globaldata;
   struct lwp_params;
   
   int     enterpgrp (struct proc *p, pid_t pgid, int mksess);
   void    proc_add_allproc(struct proc *p);
   void    proc_move_allproc_zombie(struct proc *);
   void    proc_remove_zombie(struct proc *);
   void    allproc_scan(int (*callback)(struct proc *, void *), void *data);
   void    alllwp_scan(int (*callback)(struct lwp *, void *), void *data);
   void    zombproc_scan(int (*callback)(struct proc *, void *), void *data);
   void    fixjobc (struct proc *p, struct pgrp *pgrp, int entering);
   void    updatepcpu(struct lwp *, int, int);
   int     inferior (struct proc *p);
   int     leavepgrp (struct proc *p);
   void    sess_hold(struct session *sp);
   void    sess_rele(struct session *sp);
   void    procinit (void);
   void    procinsertinit(struct proc *p);
   void    sessinsertinit(struct session *sess);
   void    pgrpinsertinit(struct pgrp *pg);
   void    relscurproc(struct proc *curp);
   int     p_trespass (struct ucred *cr1, struct ucred *cr2);
   void    setrunnable (struct lwp *);
   void    proc_stop (struct proc *);
   void    proc_unstop (struct proc *);
   void    sleep_gdinit (struct globaldata *);
   thread_t cpu_heavy_switch (struct thread *);
   thread_t cpu_lwkt_switch (struct thread *);
   
   void    cpu_lwp_exit (void) __dead2;
   void    cpu_thread_exit (void) __dead2;
   void    lwp_exit (int masterexit, void *waddr) __dead2;
   void    lwp_dispose (struct lwp *);
   int     killalllwps (int);
   void    exit1 (int) __dead2;
   void    cpu_fork (struct lwp *, struct lwp *, int);
   int     cpu_prepare_lwp(struct lwp *, struct lwp_params *);
   void    cpu_set_fork_handler (struct lwp *, void (*)(void *, struct trapframe *), void *);
   void    cpu_set_thread_handler(struct thread *td, void (*retfunc)(void), void *func, void *arg);
   int     fork1 (struct lwp *, int, struct proc **);
   void    start_forked_proc (struct lwp *, struct proc *);
   int     trace_req (struct proc *);
   void    cpu_thread_wait (struct thread *);
   void    setsugid (void);
   void    faultin (struct proc *p);
   void    swapin_request (void);
   void    phold (struct proc *);
   void    prele (struct proc *);
   int     pholdzomb (struct proc *);
   void    prelezomb (struct proc *);
   void    pstall (struct proc *, const char *, int);
   void    lwpuserret(struct lwp *);
   void    lwpkthreaddeferred(void);
   
   u_int32_t       procrunnable (void);
   
   #endif  /* _KERNEL */
   
   #endif  /* _KERNEL || _KERNEL_STRUCTURES */
   #endif  /* !_SYS_PROC_H_ */

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