bsd/sys/proc_internal.h

   1 /*
   2  * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
  29 /*-
  30  * Copyright (c) 1986, 1989, 1991, 1993
  31  *      The Regents of the University of California.  All rights reserved.
  32  * (c) UNIX System Laboratories, Inc.
  33  * All or some portions of this file are derived from material licensed
  34  * to the University of California by American Telephone and Telegraph
  35  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
  36  * the permission of UNIX System Laboratories, Inc.
  37  *
  38  * Redistribution and use in source and binary forms, with or without
  39  * modification, are permitted provided that the following conditions
  40  * are met:
  41  * 1. Redistributions of source code must retain the above copyright
  42  *    notice, this list of conditions and the following disclaimer.
  43  * 2. Redistributions in binary form must reproduce the above copyright
  44  *    notice, this list of conditions and the following disclaimer in the
  45  *    documentation and/or other materials provided with the distribution.
  46  * 3. All advertising materials mentioning features or use of this software
  47  *    must display the following acknowledgement:
  48  *      This product includes software developed by the University of
  49  *      California, Berkeley and its contributors.
  50  * 4. Neither the name of the University nor the names of its contributors
  51  *    may be used to endorse or promote products derived from this software
  52  *    without specific prior written permission.
  53  *
  54  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  55  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  56  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  57  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  58  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  59  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  60  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  61  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  62  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  63  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  64  * SUCH DAMAGE.
  65  *
  66  *      @(#)proc_internal.h     8.15 (Berkeley) 5/19/95
  67  */
  68 /*
  69  * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
  70  * support for mandatory and extensible security protections.  This notice
  71  * is included in support of clause 2.2 (b) of the Apple Public License,
  72  * Version 2.0.
  73  */
  74
  75 #ifndef _SYS_PROC_INTERNAL_H_
  76 #define _SYS_PROC_INTERNAL_H_
  77
  78 #include <libkern/OSAtomic.h>
  79 #include <sys/proc.h>
  80 __BEGIN_DECLS
  81 #include <kern/locks.h>
  82 __END_DECLS
  83
  84 #if DEBUG
  85 #define __PROC_INTERNAL_DEBUG 1
  86 #endif
  87
  88 /*
  89  * The short form for various locks that protect fields in the data structures.
  90  * PL = Process Lock
  91  * PGL = Process Group Lock
  92  * PFDL = Process File Desc Lock
  93  * PSL = Process Spin Lock
  94  * PPL = Parent Process Lock (planed for later usage)
  95  * LL = List Lock
  96  * SL = Session Lock
  97 */
  98 struct label;
  99
 100 /*
 101  * Added by SPARTA, Inc.
 102  */
 103 /*
 104  * Login context.
 105  */
 106 struct lctx {
 107         LIST_ENTRY(lctx) lc_list;       /* List of all login contexts. */
 108         LIST_HEAD(, proc) lc_members;   /* Pointer to lc members. */
 109         int             lc_mc;          /* Member Count. */
 110         pid_t           lc_id;          /* Login context ID. */
 111         lck_mtx_t       lc_mtx;         /* Mutex to protect members */
 112
 113         struct label    *lc_label;      /* Login context MAC label. */
 114 };
 115
 116 /*
 117  * One structure allocated per session.
 118  */
 119 struct  session {
 120         int                     s_count;                /* Ref cnt; pgrps in session. (LL) */
 121         struct  proc *          s_leader;               /* Session leader.(static) */
 122         struct  vnode *         s_ttyvp;                /* Vnode of controlling terminal.(SL) */
 123         int                     s_ttyvid;               /* Vnode id of the controlling terminal (SL) */
 124         struct  tty *           s_ttyp;                 /* Controlling terminal. (SL) */
 125         pid_t                   s_ttypgrpid;            /* tty's pgrp id */
 126         pid_t                   s_sid;                  /* Session ID (static) */
 127         char                    s_login[MAXLOGNAME];    /* Setlogin() name.(SL) */
 128         int                     s_flags;                /* Session flags (s_mlock)  */
 129         LIST_ENTRY(session)     s_hash;                 /* Hash chain.(LL) */
 130         lck_mtx_t               s_mlock;                /* mutex lock to protect session */
 131         int                     s_listflags;
 132 };
 133
 134 #define SESSION_NULL (struct session *)0
 135
 136 /*
 137  * Session flags; used to tunnel information to lower layers and line
 138  * disciplines, etc.
 139  */
 140 #define S_DEFAULT       0x00000000      /* No flags set */
 141 #define S_NOCTTY        0x00000001      /* Do not associate controlling tty */
 142
 143
 144 #define S_LIST_TERM     1               /* marked for termination */
 145 #define S_LIST_DEAD     2               /* already dead */
 146 /*
 147  * One structure allocated per process group.
 148  */
 149 struct  pgrp {
 150         LIST_ENTRY(pgrp)        pg_hash;        /* Hash chain. (LL) */
 151         LIST_HEAD(, proc)       pg_members;     /* Pointer to pgrp members. (PGL) */
 152         struct  session *       pg_session;     /* Pointer to session. (LL ) */
 153         pid_t                   pg_id;          /* Pgrp id. (static) */
 154         int                     pg_jobc;        /* # procs qualifying pgrp for job control (PGL) */
 155         int                     pg_membercnt;   /* Number of processes in the pgrocess group (PGL) */
 156         int                     pg_refcount;    /* number of current iterators (LL) */
 157         unsigned int            pg_listflags;   /* (LL) */
 158         lck_mtx_t               pg_mlock;       /* mutex lock to protect pgrp */
 159 };
 160
 161 #define PGRP_FLAG_TERMINATE     1
 162 #define PGRP_FLAG_WAITTERMINATE 2
 163 #define PGRP_FLAG_DEAD          4
 164 #define PGRP_FLAG_ITERABEGIN    8
 165 #define PGRP_FLAG_ITERWAIT      0x10
 166
 167 #define PGRP_NULL (struct pgrp *)0
 168 struct proc;
 169
 170 #define PROC_NULL (struct proc *)0
 171
 172 /*
 173  * Description of a process.
 174  *
 175  * This structure contains the information needed to manage a thread of
 176  * control, known in UN*X as a process; it has references to substructures
 177  * containing descriptions of things that the process uses, but may share
 178  * with related processes.  The process structure and the substructures
 179  * are always addressible except for those marked "(PROC ONLY)" below,
 180  * which might be addressible only on a processor on which the process
 181  * is running.
 182  */
 183 struct  proc {
 184         LIST_ENTRY(proc) p_list;                /* List of all processes. */
 185
 186         pid_t           p_pid;                  /* Process identifier. (static)*/
 187         void *          task;                   /* corresponding task (static)*/
 188         struct  proc *  p_pptr;                 /* Pointer to parent process.(LL) */
 189         pid_t           p_ppid;                 /* process's parent pid number */
 190         pid_t           p_pgrpid;               /* process group id of the process (LL)*/
 191
 192         lck_mtx_t       p_mlock;                /* mutex lock for proc */
 193
 194         char            p_stat;                 /* S* process status. (PL)*/
 195         char            p_shutdownstate;
 196         char            p_kdebug;               /* P_KDEBUG eq (CC)*/
 197         char            p_btrace;               /* P_BTRACE eq (CC)*/
 198
 199         LIST_ENTRY(proc) p_pglist;              /* List of processes in pgrp.(PGL) */
 200         LIST_ENTRY(proc) p_sibling;             /* List of sibling processes. (LL)*/
 201         LIST_HEAD(, proc) p_children;           /* Pointer to list of children. (LL)*/
 202         TAILQ_HEAD( , uthread) p_uthlist;       /* List of uthreads  (PL) */
 203
 204         LIST_ENTRY(proc) p_hash;                /* Hash chain. (LL)*/
 205         TAILQ_HEAD( ,eventqelt) p_evlist;       /* (PL) */
 206
 207         lck_mtx_t       p_fdmlock;              /* proc lock to protect fdesc */
 208
 209         /* substructures: */
 210         kauth_cred_t    p_ucred;                /* Process owner's identity. (PL) */
 211         struct  filedesc *p_fd;                 /* Ptr to open files structure. (PFDL) */
 212         struct  pstats *p_stats;                /* Accounting/statistics (PL). */
 213         struct  plimit *p_limit;                /* Process limits.(PL) */
 214
 215         struct  sigacts *p_sigacts;             /* Signal actions, state (PL) */
 216         lck_spin_t      p_slock;                /* spin lock for itimer/profil protection */
 217
 218 #define p_rlimit        p_limit->pl_rlimit
 219
 220         struct  plimit *p_olimit;               /* old process limits  - not inherited by child  (PL) */
 221         unsigned int    p_flag;                 /* P_* flags. (atomic bit ops) */
 222         unsigned int    p_lflag;                /* local flags  (PL) */
 223         unsigned int    p_listflag;             /* list flags (LL) */
 224         unsigned int    p_ladvflag;             /* local adv flags (atomic) */
 225         int             p_refcount;             /* number of outstanding users(LL) */
 226         int             p_childrencnt;          /* children holding ref on parent (LL) */
 227         int             p_parentref;            /* children lookup ref on parent (LL) */
 228
 229         pid_t           p_oppid;                /* Save parent pid during ptrace. XXX */
 230         u_int           p_xstat;                /* Exit status for wait; also stop signal. */
 231
 232 #ifdef _PROC_HAS_SCHEDINFO_
 233         /* may need cleanup, not used */
 234         u_int           p_estcpu;               /* Time averaged value of p_cpticks.(used by aio and proc_comapre) */
 235         fixpt_t         p_pctcpu;               /* %cpu for this process during p_swtime (used by aio)*/
 236         u_int           p_slptime;              /* used by proc_compare */
 237 #endif /* _PROC_HAS_SCHEDINFO_ */
 238
 239         struct  itimerval p_realtimer;          /* Alarm timer. (PSL) */
 240         struct  timeval p_rtime;                /* Real time.(PSL)  */
 241         struct  itimerval p_vtimer_user;        /* Virtual timers.(PSL)  */
 242         struct  itimerval p_vtimer_prof;        /* (PSL) */
 243
 244         struct  timeval p_rlim_cpu;             /* Remaining rlim cpu value.(PSL) */
 245         int             p_debugger;             /*  NU 1: can exec set-bit programs if suser */
 246         boolean_t       sigwait;        /* indication to suspend (PL) */
 247         void    *sigwait_thread;        /* 'thread' holding sigwait(PL)  */
 248         void    *exit_thread;           /* Which thread is exiting(PL)  */
 249         int     p_vforkcnt;             /* number of outstanding vforks(PL)  */
 250         void *  p_vforkact;             /* activation running this vfork proc)(static)  */
 251         int     p_fpdrainwait;          /* (PFDL) */
 252         pid_t   p_contproc;     /* last PID to send us a SIGCONT (PL) */
 253
 254         /* Following fields are info from SIGCHLD (PL) */
 255         pid_t   si_pid;                 /* (PL) */
 256         u_int   si_status;              /* (PL) */
 257         u_int   si_code;                /* (PL) */
 258         uid_t   si_uid;                 /* (PL) */
 259
 260         void * vm_shm;                  /* (SYSV SHM Lock) for sysV shared memory */
 261
 262 #if CONFIG_DTRACE
 263         user_addr_t                     p_dtrace_argv;                  /* (write once, read only after that) */
 264         user_addr_t                     p_dtrace_envp;                  /* (write once, read only after that) */
 265         lck_mtx_t                       p_dtrace_sprlock;               /* sun proc lock emulation */
 266         int                             p_dtrace_probes;                /* (PL) are there probes for this proc? */
 267         u_int                           p_dtrace_count;                 /* (sprlock) number of DTrace tracepoints */
 268         struct dtrace_ptss_page*        p_dtrace_ptss_pages;            /* (sprlock) list of user ptss pages */
 269         struct dtrace_ptss_page_entry*  p_dtrace_ptss_free_list;        /* (atomic) list of individual ptss entries */
 270         struct dtrace_helpers*          p_dtrace_helpers;               /* (dtrace_lock) DTrace per-proc private */
 271         struct dof_ioctl_data*          p_dtrace_lazy_dofs;             /* (sprlock) unloaded dof_helper_t's */
 272 #endif /* CONFIG_DTRACE */
 273
 274 /* XXXXXXXXXXXXX BCOPY'ed on fork XXXXXXXXXXXXXXXX */
 275 /* The following fields are all copied upon creation in fork. */
 276 #define p_startcopy     p_argslen
 277
 278         u_int   p_argslen;       /* Length of process arguments. */
 279         int     p_argc;                 /* saved argc for sysctl_procargs() */
 280         user_addr_t user_stack;         /* where user stack was allocated */
 281         struct  vnode *p_textvp;        /* Vnode of executable. */
 282         off_t   p_textoff;              /* offset in executable vnode */
 283
 284         sigset_t p_sigmask;             /* DEPRECATED */
 285         sigset_t p_sigignore;   /* Signals being ignored. (PL) */
 286         sigset_t p_sigcatch;    /* Signals being caught by user.(PL)  */
 287
 288         u_char  p_priority;     /* (NU) Process priority. */
 289         u_char  p_resv0;        /* (NU) User-priority based on p_cpu and p_nice. */
 290         char    p_nice;         /* Process "nice" value.(PL) */
 291         u_char  p_resv1;        /* (NU) User-priority based on p_cpu and p_nice. */
 292
 293 #if CONFIG_MACF
 294         int     p_mac_enforce;                  /* MAC policy enforcement control */
 295 #endif
 296
 297         char    p_comm[MAXCOMLEN+1];
 298         char    p_name[(2*MAXCOMLEN)+1];        /* PL */
 299
 300         struct  pgrp *p_pgrp;   /* Pointer to process group. (LL) */
 301         int             p_iopol_disk;   /* disk I/O policy (PL) */
 302         uint32_t        p_csflags;      /* flags for codesign (PL) */
 303
 304 /* End area that is copied on creation. */
 305 /* XXXXXXXXXXXXX End of BCOPY'ed on fork (AIOLOCK)XXXXXXXXXXXXXXXX */
 306 #define p_endcopy       aio_active_count
 307         int             aio_active_count;       /* entries on aio_activeq */
 308         int             aio_done_count;         /* entries on aio_doneq */
 309         TAILQ_HEAD( , aio_workq_entry ) aio_activeq; /* active async IO requests */
 310         TAILQ_HEAD( , aio_workq_entry ) aio_doneq;       /* completed async IO requests */
 311
 312         struct klist p_klist;  /* knote list (PL ?)*/
 313
 314         struct  rusage *p_ru;   /* Exit information. (PL) */
 315         thread_t        p_signalholder;
 316         thread_t        p_transholder;
 317
 318         /* DEPRECATE following field  */
 319         u_short p_acflag;       /* Accounting flags. */
 320
 321         struct lctx *p_lctx;            /* Pointer to login context. */
 322         LIST_ENTRY(proc) p_lclist;      /* List of processes in lctx. */
 323         user_addr_t     p_threadstart;          /* pthread start fn */
 324         user_addr_t     p_wqthread;             /* pthread workqueue fn */
 325         int     p_pthsize;                      /* pthread size */
 326         void *  p_wqptr;                        /* workq ptr */
 327         int     p_wqsize;                       /* allocated size */
 328         lck_mtx_t       p_wqlock;               /* lock to protect work queue */
 329         struct  timeval p_start;                /* starting time */
 330         void *  p_rcall;
 331         int             p_ractive;
 332         int     p_idversion;            /* version of process identity */
 333 #if DIAGNOSTIC
 334         unsigned int p_fdlock_pc[4];
 335         unsigned int p_fdunlock_pc[4];
 336 #if SIGNAL_DEBUG
 337         unsigned int lockpc[8];
 338         unsigned int unlockpc[8];
 339 #endif /* SIGNAL_DEBUG */
 340 #endif /* DIAGNOSTIC */
 341 };
 342
 343 #define PGRPID_DEAD 0xdeaddead
 344
 345 /* p_listflag */
 346 #define P_LIST_DRAIN                    0x00000001
 347 #define P_LIST_DRAINWAIT                0x00000002
 348 #define P_LIST_DRAINED                  0x00000004
 349 #define P_LIST_DEAD                             0x00000008
 350 #define P_LIST_WAITING                  0x00000010
 351 #define P_LIST_EXITED                   0x00000040
 352 #define P_LIST_CHILDDRSTART     0x00000080
 353 #define P_LIST_CHILDDRAINED     0x00000100
 354 #define P_LIST_CHILDDRWAIT      0x00000200
 355 #define P_LIST_CHILDLKWAIT      0x00000400
 356 #define P_LIST_DEADPARENT       0x00000800
 357 #define P_LIST_PARENTREFWAIT    0x00001000
 358 #define P_LIST_INCREATE                 0x00002000
 359 /* 0x4000 &  0x8000 Not used */
 360 #define P_LIST_INHASH                   0x00010000      /* process is in hash */
 361 #define P_LIST_INPGRP                   0x00020000      /* process is in pgrp */
 362 #define P_LIST_PGRPTRANS                0x00040000      /* pgrp is getting replaced */
 363 #define P_LIST_PGRPTRWAIT               0x00080000      /* wait for pgrp replacement */
 364
 365
 366 /* local flags */
 367 #define P_LDELAYTERM    0x00000001      /* */
 368 #define P_LNOZOMB       0x00000002      /* */
 369 #define P_LTERM         0x00000004      /* */
 370 #define P_LEXIT         0x00000008      /* */
 371 #define P_LPEXIT        0x00000010
 372 #define P_LTHSIGSTACK   0x00000020
 373 #define P_LINTRANSIT    0x00000040      /* process in exec or in creation */
 374 #define P_LTRANSWAIT    0x00000080      /* waiting for trans to complete */
 375 #define P_LVFORK        0x00000100      /* */
 376 #define P_LINVFORK      0x00000200      /* */
 377 #define P_LTRACED       0x00000400      /* */
 378 #define P_LSIGEXC       0x00000800      /* */
 379 #define P_LNOATTACH     0x00001000      /* */
 380 #define P_LPPWAIT       0x00002000      /* */
 381 #define P_LKQWDRAIN     0x00004000
 382 #define P_LKQWDRAINWAIT 0x00008000
 383 #define P_LKQWDEAD      0x00010000
 384 #define P_LLIMCHANGE    0x00020000
 385 #define P_LLIMWAIT      0x00040000
 386 #define P_LWAITED       0x00080000
 387 #define P_LINSIGNAL     0x00100000
 388 #define P_LSIGNALWAIT   0x00200000
 389 #define P_LRAGE_VNODES  0x00400000
 390
 391 /* advisory flags in the proc */
 392 #define P_LADVLOCK              0x01
 393
 394 /* defns for proc_iterate */
 395 #define PROC_ALLPROCLIST        1               /* walk the allproc list (procs not exited yet) */
 396 #define PROC_ZOMBPROCLIST       2               /*  walk the zombie list */
 397 #define PROC_NOWAITTRANS       4                /* do not wait for transitions (checkdirs only)  */
 398
 399 /* defns for pgrp_iterate */
 400 #define PGRP_DROPREF            1
 401 #define PGRP_BLOCKITERATE       2
 402
 403 /* return values of the proc iteration callback routine */
 404 #define PROC_RETURNED           0
 405 #define PROC_RETURNED_DONE      1
 406 #define PROC_CLAIMED            2
 407 #define PROC_CLAIMED_DONE       3
 408
 409
 410 /* LP64 version of extern_proc.  all pointers
 411  * grow when we're dealing with a 64-bit process.
 412  * WARNING - keep in sync with extern_proc
 413  * but use native alignment of 64-bit process.
 414  */
 415
 416 #ifdef KERNEL
 417 #include <sys/time.h>   /* user_timeval, user_itimerval */
 418
 419 struct user_extern_proc {
 420         union {
 421                 struct {
 422                         user_addr_t __p_forw;   /* Doubly-linked run/sleep queue. */
 423                         user_addr_t __p_back;
 424                 } p_st1;
 425                 struct user_timeval __p_starttime;      /* process start time */
 426         } p_un;
 427         user_addr_t     p_vmspace;      /* Address space. */
 428         user_addr_t             p_sigacts;      /* Signal actions, state (PROC ONLY). */
 429         int             p_flag;                 /* P_* flags. */
 430         char    p_stat;                 /* S* process status. */
 431         pid_t   p_pid;                  /* Process identifier. */
 432         pid_t   p_oppid;                /* Save parent pid during ptrace. XXX */
 433         int             p_dupfd;                /* Sideways return value from fdopen. XXX */
 434         /* Mach related  */
 435         user_addr_t user_stack __attribute((aligned(8)));       /* where user stack was allocated */
 436         user_addr_t exit_thread;  /* XXX Which thread is exiting? */
 437         int             p_debugger;             /* allow to debug */
 438         boolean_t       sigwait;        /* indication to suspend */
 439         /* scheduling */
 440         u_int   p_estcpu;        /* Time averaged value of p_cpticks. */
 441         int             p_cpticks;       /* Ticks of cpu time. */
 442         fixpt_t p_pctcpu;        /* %cpu for this process during p_swtime */
 443         user_addr_t     p_wchan __attribute((aligned(8)));       /* Sleep address. */
 444         user_addr_t     p_wmesg;         /* Reason for sleep. */
 445         u_int   p_swtime;        /* Time swapped in or out. */
 446         u_int   p_slptime;       /* Time since last blocked. */
 447         struct  user_itimerval p_realtimer;     /* Alarm timer. */
 448         struct  user_timeval p_rtime;   /* Real time. */
 449         u_quad_t p_uticks;              /* Statclock hits in user mode. */
 450         u_quad_t p_sticks;              /* Statclock hits in system mode. */
 451         u_quad_t p_iticks;              /* Statclock hits processing intr. */
 452         int             p_traceflag;            /* Kernel trace points. */
 453         user_addr_t     p_tracep __attribute((aligned(8)));     /* Trace to vnode. */
 454         int             p_siglist;              /* DEPRECATED */
 455         user_addr_t     p_textvp __attribute((aligned(8)));     /* Vnode of executable. */
 456         int             p_holdcnt;              /* If non-zero, don't swap. */
 457         sigset_t p_sigmask;     /* DEPRECATED. */
 458         sigset_t p_sigignore;   /* Signals being ignored. */
 459         sigset_t p_sigcatch;    /* Signals being caught by user. */
 460         u_char  p_priority;     /* Process priority. */
 461         u_char  p_usrpri;       /* User-priority based on p_cpu and p_nice. */
 462         char    p_nice;         /* Process "nice" value. */
 463         char    p_comm[MAXCOMLEN+1];
 464         user_addr_t     p_pgrp __attribute((aligned(8)));       /* Pointer to process group. */
 465         user_addr_t     p_addr; /* Kernel virtual addr of u-area (PROC ONLY). */
 466         u_short p_xstat;        /* Exit status for wait; also stop signal. */
 467         u_short p_acflag;       /* Accounting flags. */
 468         user_addr_t     p_ru __attribute((aligned(8))); /* Exit information. XXX */
 469 };
 470 #endif  /* KERNEL */
 471
 472 /*
 473  * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
 474  * as it is used to represent "no process group".
 475  */
 476 extern int nprocs, maxproc;             /* Current and max number of procs. */
 477 extern int maxprocperuid;               /* Current number of procs per uid */
 478 __private_extern__ int hard_maxproc;    /* hard limit */
 479
 480 #define PID_MAX         99999
 481 #define NO_PID          100000
 482 extern lck_mtx_t * proc_list_mlock;
 483 extern lck_mtx_t * proc_klist_mlock;
 484
 485 #define SESS_LEADER(p, sessp)   ((sessp)->s_leader == (p))
 486
 487 /* Lock and unlock a login context. */
 488 #define LCTX_LOCK(lc)   lck_mtx_lock(&(lc)->lc_mtx)
 489 #define LCTX_UNLOCK(lc) lck_mtx_unlock(&(lc)->lc_mtx)
 490 #define LCTX_LOCKED(lc)
 491 #define LCTX_LOCK_ASSERT(lc, type)
 492 #define ALLLCTX_LOCK    lck_mtx_lock(&alllctx_lock)
 493 #define ALLLCTX_UNLOCK  lck_mtx_unlock(&alllctx_lock)
 494 extern lck_mtx_t alllctx_lock;
 495 extern lck_grp_t * lctx_lck_grp;
 496 extern lck_grp_attr_t * lctx_lck_grp_attr;
 497 extern lck_attr_t * lctx_lck_attr;
 498
 499 #define PIDHASH(pid)    (&pidhashtbl[(pid) & pidhash])
 500 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
 501 extern u_long pidhash;
 502
 503 #define PGRPHASH(pgid)  (&pgrphashtbl[(pgid) & pgrphash])
 504 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
 505 extern u_long pgrphash;
 506 #define SESSHASH(sessid) (&sesshashtbl[(sessid) & sesshash])
 507 extern LIST_HEAD(sesshashhead, session) *sesshashtbl;
 508 extern u_long sesshash;
 509
 510 extern lck_grp_t * proc_lck_grp;
 511 extern lck_grp_attr_t * proc_lck_grp_attr;
 512 extern lck_attr_t * proc_lck_attr;
 513
 514 LIST_HEAD(proclist, proc);
 515 extern struct proclist allproc;         /* List of all processes. */
 516 extern struct proclist zombproc;        /* List of zombie processes. */
 517 extern struct proc *initproc;
 518 extern void     procinit(void) __attribute__((section("__TEXT, initcode")));
 519 extern void proc_lock(struct proc *);
 520 extern void proc_unlock(struct proc *);
 521 extern void proc_spinlock(struct proc *);
 522 extern void proc_spinunlock(struct proc *);
 523 extern void proc_list_lock(void);
 524 extern void proc_list_unlock(void);
 525 extern void proc_klist_lock(void);
 526 extern void proc_klist_unlock(void);
 527 extern void proc_fdlock(struct proc *);
 528 extern void proc_fdlock_spin(struct proc *);
 529 extern void proc_fdunlock(struct proc *);
 530 extern void proc_fdlock_assert(proc_t p, int assertflags);
 531 __private_extern__ int proc_core_name(const char *name, uid_t uid, pid_t pid,
 532                 char *cr_name, size_t cr_name_len);
 533 extern int isinferior(struct proc *, struct proc *);
 534 __private_extern__ struct proc *pzfind(pid_t);  /* Find zombie by id. */
 535
 536 extern struct   lctx *lcfind(pid_t);            /* Find a login context by id */
 537 extern struct   lctx *lccreate(void);           /* Create a new login context */
 538
 539 extern int      chgproccnt(uid_t uid, int diff);
 540 extern void     enterlctx(struct proc *p, struct lctx *l, int create);
 541 extern void     pinsertchild(struct proc *parent, struct proc *child);
 542 extern int      enterpgrp(struct proc *p, pid_t pgid, int mksess);
 543 extern void     fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
 544 extern int      inferior(struct proc *p);
 545 extern int      leavepgrp(struct proc *p);
 546 extern void     leavelctx(struct proc *p);
 547 extern void     resetpriority(struct proc *);
 548 extern void     setrunnable(struct proc *);
 549 extern void     setrunqueue(struct proc *);
 550 extern int      sleep(void *chan, int pri);
 551 extern int      tsleep0(void *chan, int pri, const char *wmesg, int timo, int (*continuation)(int));
 552 extern int      tsleep1(void *chan, int pri, const char *wmesg, u_int64_t abstime, int (*continuation)(int));
 553 extern int      msleep0(void *chan, lck_mtx_t *mtx, int pri, const char *wmesg, int timo, int (*continuation)(int));
 554 extern void     vfork_return(struct proc *child, register_t *retval, int rval);
 555 extern int      exit1(struct proc *, int, int *);
 556 extern void vfork_exit_internal(struct proc *p, int rv, int forced);
 557 extern void proc_reparentlocked(struct proc *child, struct proc * newparent, int cansignal, int locked);
 558 extern int pgrp_iterate(struct pgrp * pgrp, int flags, int (*callout)(proc_t , void *), void *arg, int (*filterfn)(proc_t , void *), void *filterarg);
 559 extern int proc_iterate(int flags, int (*callout)(proc_t , void *), void *arg, int (*filterfn)(proc_t , void *), void *filterarg);
 560 extern int proc_rebootscan(int (*callout)(proc_t , void *), void *arg, int (*filterfn)(proc_t , void *), void *filterarg);
 561 extern int proc_childrenwalk(proc_t p, int (*callout)(proc_t , void *), void *arg);
 562 extern proc_t proc_findinternal(int pid, int funneled);
 563 extern void proc_refdrain(proc_t);
 564 extern void proc_childdrainlocked(proc_t);
 565 extern void proc_childdrainstart(proc_t);
 566 extern void proc_childdrainend(proc_t);
 567 extern void  proc_checkdeadrefs(proc_t);
 568 struct proc *pfind_locked(pid_t);
 569 extern struct pgrp *pgfind(pid_t);
 570 extern void pg_rele(struct pgrp * pgrp);
 571 extern struct session * session_find_internal(pid_t sessid);
 572 extern struct pgrp * proc_pgrp(proc_t);
 573 extern struct pgrp * tty_pgrp(struct tty * tp);
 574 extern struct pgrp * pgfind_internal(pid_t);
 575 extern struct session * proc_session(proc_t);
 576 extern void pgrp_lock(struct pgrp * pgrp);
 577 extern void pgrp_unlock(struct pgrp * pgrp);
 578 extern void session_lock(struct session * sess);
 579 extern void session_unlock(struct session * sess);
 580 extern struct session * pgrp_session(struct pgrp * pgrp);
 581 extern void     session_rele(struct session *sess);
 582 extern int isbackground(proc_t p, struct tty  *tp);
 583 extern proc_t proc_parent(proc_t);
 584 extern proc_t proc_parentholdref(proc_t);
 585 extern int proc_parentdropref(proc_t, int);
 586 int     itimerfix(struct timeval *tv);
 587 int     itimerdecr(struct proc * p, struct itimerval *itp, int usec);
 588 void proc_signalstart(struct proc *, int locked);
 589 void proc_signalend(struct proc *, int locked);
 590 void proc_transstart(struct proc *, int locked);
 591 void proc_transend(struct proc *, int locked);
 592 void proc_transwait(struct proc *, int locked);
 593 void  proc_rele_locked(struct proc *  p);
 594 void proc_knote(struct proc * p, long hint);
 595 void workqueue_init_lock(proc_t p);
 596 void workqueue_destroy_lock(proc_t p);
 597 #endif  /* !_SYS_PROC_INTERNAL_H_ */