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