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. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34 #ifndef _SYS_PROC_H_
35 #define _SYS_PROC_H_
36
37 #if !defined(_KERNEL) && !defined(_KERNEL_STRUCTURES)
38
39 #error "Userland must include sys/user.h instead of sys/proc.h"
40
41 #else
42
43 #include <sys/callout.h> /* For struct callout. */
44 #include <sys/cpumask.h>
45 #include <sys/filedesc.h>
46 #include <sys/queue.h>
47 #include <sys/tree.h>
48 #include <sys/rtprio.h> /* For struct rtprio. */
49 #include <sys/signal.h>
50 #include <sys/lock.h>
51 #include <sys/upmap.h>
52 #ifndef _KERNEL
53 #include <sys/time.h> /* For structs itimerval, timeval. */
54 #endif
55 #include <sys/ucred.h>
56 #include <sys/event.h> /* For struct klist */
57 #include <sys/eventvar.h>
58 #include <sys/proc_common.h> /* For struct proc enums */
59 #include <sys/sysent.h> /* For struct sysentvec */
60 #include <sys/thread.h>
61 #include <sys/varsym.h>
62 #include <sys/resourcevar.h>
63 #ifdef _KERNEL
64 #include <sys/procctl.h>
65 #include <sys/globaldata.h>
66 #endif
67 #include <sys/systimer.h>
68 #include <sys/iosched.h>
69 #include <sys/usched.h>
70 #include <machine/proc.h> /* Machine-dependent proc substruct. */
71 #include <machine/atomic.h> /* Machine-dependent proc substruct. */
72 #include <sys/signalvar.h>
73
74 struct proc;
75 struct pgrp;
76 struct session;
77 struct lwp;
78 struct uidcount;
79 struct procglob;
80 struct vm_map_backing;
81
82 LIST_HEAD(proclist, proc);
83 LIST_HEAD(pgrplist, pgrp);
84 LIST_HEAD(sesslist, session);
85 LIST_HEAD(lwplist, lwp);
86
87 struct lwp_rb_tree;
88 RB_HEAD(lwp_rb_tree, lwp);
89 RB_PROTOTYPE2(lwp_rb_tree, lwp, u.lwp_rbnode, rb_lwp_compare, lwpid_t);
90
91 /*
92 * One structure allocated per session.
93 */
94 struct session {
95 LIST_ENTRY(session) s_list; /* Hash chain. */
96 int s_count; /* Ref cnt; pgrps in session. */
97 struct procglob *s_prg;
98 struct proc *s_leader; /* Session leader. */
99 struct vnode *s_ttyvp; /* Vnode of controlling terminal. */
100 struct tty *s_ttyp; /* Controlling terminal. */
101 pid_t s_sid; /* Session ID */
102 char s_login[roundup(MAXLOGNAME, sizeof(long))]; /* Setlogin() name. */
103 };
104
105 /*
106 * One structure allocated per process group.
107 */
108 struct pgrp {
109 LIST_ENTRY(pgrp) pg_list; /* Hash chain. */
110 struct proclist pg_members; /* Pointer to pgrp members. */
111 struct session *pg_session; /* Pointer to session. */
112 struct sigiolst pg_sigiolst; /* List of sigio sources. */
113 pid_t pg_id; /* Pgrp id. */
114 int pg_jobc; /* # procs qualifying pgrp for job control */
115 u_int pg_refs;
116 struct lwkt_token pg_token;
117 struct lock pg_lock;
118 };
119
120 #define PS_NOCLDWAIT 0x0001 /* No zombies if child dies */
121 #define PS_NOCLDSTOP 0x0002 /* No SIGCHLD when children stop. */
122 #define PS_CLDSIGIGN 0x0004 /* The SIGCHLD handler is SIG_IGN. */
123
124 /*
125 * pargs, used to hold a copy of the command line, if it had a sane
126 * length
127 */
128 struct pargs {
129 u_int ar_ref; /* Reference count */
130 u_int ar_length; /* Length */
131 u_char ar_args[0]; /* Arguments */
132 };
133
134 /*
135 * Description of a process.
136 *
137 * This structure contains the information needed to manage a thread of
138 * control, known in UN*X as a process; it has references to substructures
139 * containing descriptions of things that the process uses, but may share
140 * with related processes. The process structure and the substructures
141 * are always addressable except for those marked "(PROC ONLY)" below,
142 * which might be addressable only on a processor on which the process
143 * is running.
144 *
145 * NOTE! The process start time is stored in the thread structure associated
146 * with the process. If the process is a Zombie, then this field will be
147 * inaccessible due to the thread structure being free'd in kern_wait1().
148 */
149
150 struct jail;
151 struct vkernel_proc;
152 struct vkernel_lwp;
153 struct vmspace_entry;
154 struct ktrace_node;
155 struct sem_undo;
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, >= 1 */
169
170 u_int lwp_flags; /* LWP_* flags */
171 u_int lwp_mpflags; /* LWP_MP_* flags */
172 enum lwpstat lwp_stat; /* LS* lwp status */
173 int lwp_lock; /* lwp lock (prevent destruct) count */
174
175 int lwp_unused01; /* (previously lwp_dupfd) */
176
177 /*
178 * The following two fields are marked XXX since (at least) the
179 * 4.4BSD-Lite2 import. I can only guess the reason: It is ugly.
180 * These fields are used to pass the trap code from trapsignal() to
181 * postsig(), which gets called later from userret().
182 *
183 * The correct "fix" for these XXX is to convert our signal system
184 * to use signal queues, where each signal can carry its own meta
185 * data.
186 */
187 int lwp_sig; /* for core dump/debugger XXX */
188 u_long lwp_code; /* for core dump/debugger XXX */
189
190 /*
191 * Scheduling.
192 */
193 sysclock_t lwp_cpticks; /* cpu used in sched clock ticks */
194 fixpt_t lwp_pctcpu; /* %cpu for this process */
195 u_int lwp_slptime; /* Time since last blocked. */
196 u_int lwp_rebal_ticks; /* Timestamp sched on current cpu */
197
198 int lwp_traceflag; /* Kernel trace points. */
199
200 struct rusage lwp_ru; /* stats for this lwp */
201
202 union usched_data lwp_usdata; /* User scheduler specific */
203
204 #define lwp_startcopy lwp_cpumask
205 cpumask_t lwp_cpumask;
206 sigset_t lwp_siglist; /* Signals arrived but not delivered. */
207 sigset_t lwp_oldsigmask; /* saved mask from before sigpause */
208 sigset_t lwp_sigmask; /* Current signal mask. */
209 stack_t lwp_sigstk; /* sp & on stack state variable */
210
211 struct rtprio lwp_rtprio; /* Realtime priority. */
212 #define lwp_endcopy lwp_md
213
214 struct mdproc lwp_md; /* Any machine-dependent fields. */
215
216 struct thread *lwp_thread; /* backpointer to proc's thread */
217 struct sys_lpmap *lwp_lpmap; /* user RW mappable per-thread page */
218 struct kqueue lwp_kqueue; /* for select/poll */
219 uint64_t lwp_kqueue_serial; /* for select/poll */
220 struct lwkt_token lwp_token; /* per-lwp token for signal/state */
221 struct spinlock lwp_spin; /* spinlock for signal handling */
222 TAILQ_HEAD(, vm_map_backing) lwp_lpmap_backing_list;
223 sysclock_t lwp_cpbase; /* Measurement base */
224 };
225
226 struct proc {
227 LIST_ENTRY(proc) p_list; /* List of all processes. */
228
229 /* substructures: */
230 struct ucred *p_ucred; /* Process owner's identity. */
231 struct filedesc *p_fd; /* Ptr to open files structure. */
232 struct filedesc_to_leader *p_fdtol; /* Ptr to tracking node XXX lwp */
233 struct plimit *p_limit; /* Process limits. */
234 struct pstats *p_stats;
235 u_int p_mqueue_cnt; /* Count of open mqueues. */
236 long p_waitgen; /* wait interlock allows late signal */
237 struct sigacts *p_sigacts;
238 #define p_sigignore p_sigacts->ps_sigignore
239 #define p_sigcatch p_sigacts->ps_sigcatch
240 #define p_rlimit p_limit->pl_rlimit
241
242 int p_flags; /* P_* flags. */
243 enum procstat p_stat; /* S* process status. */
244 char p_advlock_flag; /* replaces P_ADVLOCK */
245 char p_pad1[2];
246
247 pid_t p_pid; /* Process identifier. */
248 pid_t p_ppid; /* Current parent pid */
249 LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp. */
250 struct proc *p_pptr; /* Pointer to parent process. */
251 LIST_ENTRY(proc) p_sibling; /* List of sibling processes. */
252 struct proclist p_children; /* Pointer to list of children. */
253 struct callout p_ithandle; /* for scheduling p_realtimer */
254 struct varsymset p_varsymset;
255 struct iosched_data p_iosdata; /* Dynamic I/O scheduling data */
256
257 pid_t p_oppid; /* Save parent pid during ptrace. XXX */
258
259 struct vmspace *p_vmspace; /* Current address space. */
260
261 unsigned int p_swtime; /* Time swapped in or out */
262
263 struct itimerval p_realtimer; /* Alarm timer. */
264 struct itimerval p_timer[3]; /* Virtual-time timers. */
265
266 int p_traceflag; /* Kernel trace points. */
267 struct ktrace_node *p_tracenode; /* Trace to vnode. */
268
269 sigset_t p_siglist; /* Signals arrived but not delivered. */
270
271 struct vnode *p_textvp; /* Vnode of executable. */
272 struct nchandle p_textnch; /* namecache handle of executable. */
273
274 unsigned int p_stops; /* procfs event bitmask */
275 unsigned int p_stype; /* procfs stop event type */
276 char p_step; /* procfs stop *once* flag */
277 unsigned char p_pfsflags; /* procfs flags */
278 char p_pad2[2];
279 struct sigiolst p_sigiolst; /* list of sigio sources */
280 int p_sigparent; /* signal to parent on exit */
281 struct klist p_klist; /* knotes attached to this process */
282
283 struct timeval p_start; /* start time for a process */
284
285 struct rusage p_ru; /* stats for this proc */
286 struct rusage p_cru; /* sum of stats for reaped children */
287 void *p_linux_mm; /* helper for drm */
288
289 /* The following fields are all copied upon creation in fork. */
290 #define p_startcopy p_comm
291
292 char p_comm[MAXCOMLEN+1]; /* typ 16+1 bytes */
293 char p_pad3;
294 char p_nice; /* Process "nice" value. */
295 char p_pad4;
296 int p_osrel; /* release date for binary ELF note */
297
298 struct pgrp *p_pgrp; /* Pointer to process group. */
299
300 struct sysentvec *p_sysent; /* System call dispatch information. */
301
302 struct uprof p_prof; /* Profiling arguments. */
303 struct rtprio p_rtprio; /* Realtime priority. */
304 struct pargs *p_args;
305 u_short p_xstat; /* Exit status or last stop signal */
306 u_short p_depth; /* Used to downscale resource limits */
307
308 int p_ionice;
309 void *p_unused01;
310 /* End area that is copied on creation. */
311 #define p_endcopy p_unused01
312 u_short p_acflag; /* Accounting flags. */
313
314 int p_lock; /* Prevent proc destruction */
315 int p_nthreads; /* Number of threads in this process. */
316 int p_nstopped; /* Number of stopped threads. */
317 int p_lasttid; /* Last tid used. */
318 struct lwp_rb_tree p_lwp_tree; /* RB tree of LWPs for this process */
319 void *p_aioinfo; /* ASYNC I/O info */
320 int p_wakeup; /* thread id XXX lwp */
321 struct proc *p_peers; /* XXX lwp */
322 struct proc *p_leader; /* XXX lwp */
323 void *p_emuldata; /* process-specific emulator state */
324 struct usched *p_usched; /* Userland scheduling control */
325 struct vkernel_proc *p_vkernel; /* VKernel support, proc part */
326 struct uidcount *p_uidpcpu;
327 void (*p_userret)(void);/* p: return-to-user hook */
328
329 struct spinlock p_spin; /* Spinlock for LWP access to proc */
330 struct lwkt_token p_token; /* Token for LWP access to proc */
331 struct sem_undo *p_sem_undo; /* Fast semaphore tracking lookup */
332 void *p_drv_priv; /* scp linkage (for syscons) */
333 char p_unused02[44];
334 struct sys_upmap *p_upmap; /* user RW mappable per-process page */
335 forkid_t p_forkid; /* unique forkid */
336 struct sysreaper *p_reaper; /* reaper control */
337 int p_deathsig; /* signal us on parent death */
338 int p_unused03;
339 void *p_reserveds[2]; /* reserved for future */
340 };
341
342 #define lwp_wchan lwp_thread->td_wchan
343 #define lwp_wmesg lwp_thread->td_wmesg
344 #define p_session p_pgrp->pg_session
345 #define p_pgid p_pgrp->pg_id
346
347 /* These flags are kept in p_flags. */
348 #define P_UNUSED00 0x00001
349 #define P_CONTROLT 0x00002 /* Has a controlling terminal */
350 #define P_SWAPPEDOUT 0x00004 /* Deprecated (port compatibility) */
351 #define P_SYSVSEM 0x00008 /* Might have SysV semaphores */
352 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit */
353 #define P_PROFIL 0x00020 /* Has started profiling */
354 #define P_POSTEXIT 0x00040 /* Prevent procfs from stepping after this pt */
355 #define P_SCMOUSE 0x00080 /* Process is held by syscons ioctl */
356 /* was: Sleep is interruptible */
357 #define P_SUGID 0x00100 /* Had set id privileges since last exec */
358 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping */
359 #define P_MAYBETHREADED 0x00400 /* might be threaded optimization */
360 #define P_TRACED 0x00800 /* Debugged process being traced */
361 #define P_WAITED 0x01000 /* SIGSTOP status was returned by wait3/4 */
362 #define P_WEXIT 0x02000 /* Working on exiting (master exit) */
363 #define P_EXEC 0x04000 /* Process called exec */
364 #define P_CONTINUED 0x08000 /* Proc has continued from a stopped state */
365
366 #define P_LOWMEMKILL 0x00010000 /* trying to kill due to low memory */
367 #define P_UNUSED17 0x00020000
368
369 #define P_UNUSED18 0x00040000
370 #define P_UNUSED19 0x00080000 /* was: Now in a zombied state */
371
372 /* Marked a kernel thread */
373 #define P_UNUSED20 0x00100000 /* was: on a user scheduling run queue */
374 #define P_UNUSED21 0x00200000 /* was: Process is really a kernel thread */
375 #define P_IDLESWAP 0x00400000 /* Swapout was due to idleswap, not load */
376
377 #define P_JAILED 0x01000000 /* Process is in a jail */
378 #define P_SIGVTALRM 0x02000000 /* signal SIGVTALRM pending due to itimer */
379 #define P_SIGPROF 0x04000000 /* signal SIGPROF pending due to itimer */
380 #define P_INEXEC 0x08000000 /* Process is in execve(). */
381 #define P_DIDCHROOT 0x10000000 /* Did at least one chroot */
382 #define P_UNUSED29 0x20000000
383 #define P_XCPU 0x40000000 /* SIGXCPU */
384
385 #define LWP_ALTSTACK 0x0000001 /* have alternate signal stack */
386 #define LWP_OLDMASK 0x0000002 /* need to restore mask before pause */
387 #define LWP_SINTR 0x0000008 /* Sleep is interruptible. */
388 #define LWP_SELECT 0x0000010 /* Selecting; wakeup/waiting danger. */
389 #define LWP_UNUSED20 0x0000020
390 #define LWP_UNUSED40 0x0000040
391 #define LWP_UNUSED80 0x0000080
392 #define LWP_PASSIVE_ACQ 0x0000100 /* Passive acquire cpu (see kern_switch) */
393 #define LWP_PAGING 0x0000200 /* Currently in vm_fault */
394
395 /*
396 * LWP_MP_WSTOP: When set the thread will stop prior to return to userland
397 * and has been counted in the process stop-threads-count, but
398 * may still be running in kernel-land.
399 *
400 * LWP_MP_WEXIT: When set the thread has been asked to exit and will not return
401 * to userland. p_nthreads will not be decremented until the
402 * thread has actually exited.
403 */
404 #define LWP_MP_ONRUNQ 0x0000001 /* on a user scheduling run queue */
405 #define LWP_MP_WEXIT 0x0000002 /* working on exiting (lwpuserret()) */
406 #define LWP_MP_WSTOP 0x0000004 /* working on stopping */
407 #define LWP_MP_ULOAD 0x0000008 /* uload accounting for current cpu */
408 #define LWP_MP_RRFORCE 0x0000010 /* forced resched due to rrcount */
409 #define LWP_MP_VNLRU 0x0000020 /* check excessive vnode allocations (lwpuserret()) */
410
411 #define LWP_MP_URETMASK (LWP_MP_WEXIT | LWP_MP_VNLRU)
412
413 #define FIRST_LWP_IN_PROC(p) RB_FIRST(lwp_rb_tree, &(p)->p_lwp_tree)
414 #define FOREACH_LWP_IN_PROC(lp, p) \
415 RB_FOREACH(lp, lwp_rb_tree, &(p)->p_lwp_tree)
416 #define ONLY_LWP_IN_PROC(p) _only_lwp_in_proc(p, __func__)
417
418 struct procglob {
419 struct lwkt_token proc_token;
420 struct proclist allproc; /* locked by proc_token */
421 struct pgrplist allpgrp; /* locked by proc_token */
422 struct sesslist allsess; /* locked by proc_token */
423 void *pad01; /* pad for clarity */
424 } __cachealign;
425
426 #ifdef _KERNEL
427 static inline struct lwp *
_only_lwp_in_proc(struct proc * p,const char * caller)428 _only_lwp_in_proc(struct proc *p, const char *caller)
429 {
430 if (p->p_nthreads != 1) {
431 panic("%s: proc %p (pid %d cmd %s) has more than one thread",
432 caller, p, p->p_pid, p->p_comm);
433 }
434 return RB_ROOT(&p->p_lwp_tree);
435 }
436 #endif
437
438 /*
439 * We use process IDs <= PID_MAX. NO_PID must also fit in a pid_t and
440 * is used to represent "no process group".
441 */
442 #define PID_MAX 999999
443 #define NO_PID 0x7FFFFFFF
444
445 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
446
447 #ifdef _KERNEL
448
449 #ifdef MALLOC_DECLARE
450 MALLOC_DECLARE(M_SESSION);
451 MALLOC_DECLARE(M_PROC);
452 MALLOC_DECLARE(M_LWP);
453 MALLOC_DECLARE(M_SUBPROC);
454 MALLOC_DECLARE(M_PARGS);
455 #endif
456
457 /*
458 * Handy macro to determine if p1 can mangle p2.
459 *
460 * Must be spin-safe.
461 */
462 #define PRISON_CHECK(cr1, cr2) \
463 ((!(cr1)->cr_prison) || (cr1)->cr_prison == (cr2)->cr_prison)
464
465 /*
466 * STOPEVENT
467 */
468 void stopevent(struct proc *, unsigned int, unsigned int);
469 #define STOPEVENT(p,e,v) \
470 do { \
471 if (__predict_false((p)->p_stops & (e))) { \
472 stopevent(p,e,v); \
473 } \
474 } while (0)
475
476 /*
477 * Hold process in memory, don't destruct, used by ktrace, procfs, sigio,
478 * and signaling code (e.g. ksignal()).
479 *
480 * MPSAFE
481 */
482 #define PHOLD(p) phold((p))
483 #define PRELE(p) prele((p))
484 #define PHOLDZOMB(p) pholdzomb((p))
485 #define PRELEZOMB(p) prelezomb((p))
486 #define PWAITRES_PENDING(p) pwaitres_pending((p))
487 #define PWAITRES_SET(p) pwaitres_set((p))
488
489 #define PSTALL(p, msg, n) \
490 do { if ((p)->p_lock > (n)) pstall((p), (msg), (n)); } while (0)
491
492 #define STOPLWP(p, lp) \
493 (((p)->p_stat == SSTOP || (p)->p_stat == SCORE) && \
494 ((lp)->lwp_mpflags & LWP_MP_WEXIT) == 0)
495
496 /*
497 * Hold lwp in memory, don't destruct, normally for ptrace/procfs work
498 * atomic ops because they can occur from an IPI.
499 * MPSAFE
500 */
501 #define LWPHOLD(lp) atomic_add_int(&(lp)->lwp_lock, 1)
502 #define LWPRELE(lp) atomic_add_int(&(lp)->lwp_lock, -1)
503
504 extern struct proc proc0; /* Process slot for swapper. */
505 extern struct lwp lwp0; /* LWP slot for swapper. */
506 extern struct thread thread0; /* Thread slot for swapper. */
507 extern int nprocs, maxproc; /* Current and max number of procs. */
508 extern int maxprocperuid; /* Max procs per uid. */
509
510 extern struct proc *initproc; /* Process slot for init */
511 extern struct thread *pagethread;
512 extern struct thread *emergpager;
513 extern struct thread *updatethread;
514
515 /*
516 * Scheduler independant variables. The primary scheduler polling frequency,
517 * the maximum ESTCPU value, and the weighting factor for nice values. A
518 * cpu bound program's estcpu will increase to ESTCPUMAX - 1.
519 */
520 #define ESTCPUFREQ 50
521
522 extern u_long ps_arg_cache_limit;
523 extern int ps_argsopen;
524 extern int ps_showallprocs;
525
526 struct lwp *lwpfind (struct proc *, lwpid_t); /* Find thread in process */
527 struct proc *pfind (pid_t); /* Find process by id w/ref */
528 struct proc *pfindn (pid_t); /* Find process by id wo/ref */
529 struct pgrp *pgfind (pid_t); /* Find process group by id w/ref */
530 struct proc *zpfind (pid_t); /* Find zombie process by id w/ref */
531 void pgref (struct pgrp *); /* Ref pgrp preventing disposal */
532 void pgrel (struct pgrp *); /* Deref pgrp & dispose on 1->0 trans */
533
534 struct globaldata;
535 struct lwp_params;
536
537 int enterpgrp (struct proc *p, pid_t pgid, int mksess);
538 void proc_add_allproc(struct proc *p);
539 void proc_move_allproc_zombie(struct proc *);
540 void proc_remove_zombie(struct proc *);
541 void allproc_scan(int (*callback)(struct proc *, void *), void *data,
542 int segmented);
543 void alllwp_scan(int (*callback)(struct lwp *, void *), void *data,
544 int segmented);
545 void zombproc_scan(int (*callback)(struct proc *, void *), void *data);
546 void fixjobc (struct proc *p, struct pgrp *pgrp, int entering);
547 void updatepcpu(struct lwp *, int, int);
548 int inferior (struct proc *p);
549 int leavepgrp (struct proc *p);
550 void sess_hold(struct session *sp);
551 void sess_rele(struct session *sp);
552 void procinit (void);
553 void procinsertinit(struct proc *p);
554 void sessinsertinit(struct session *sess);
555 void pgrpinsertinit(struct pgrp *pg);
556 void relscurproc(struct proc *curp);
557 int p_trespass (struct ucred *cr1, struct ucred *cr2);
558 void setrunnable (struct lwp *);
559 void proc_stop (struct proc *, int);
560 void proc_unstop (struct proc *, int);
561 void sleep_early_gdinit (struct globaldata *);
562 void sleep_gdinit (struct globaldata *);
563 thread_t cpu_heavy_switch (struct thread *);
564 thread_t cpu_lwkt_switch (struct thread *);
565
566 int cpu_interrupt_running(struct thread *);
567 void cpu_lwp_exit (void) __dead2;
568 void cpu_thread_exit (void) __dead2;
569 void lwp_exit (int masterexit, void *waddr) __dead2;
570 void lwp_dispose (struct lwp *);
571 int killalllwps (int);
572 void exit1 (int) __dead2;
573 void cpu_fork (struct lwp *, struct lwp *, int);
574 int cpu_prepare_lwp(struct lwp *, struct lwp_params *);
575 void cpu_set_fork_handler (struct lwp *, void (*)(void *, struct trapframe *), void *);
576 void cpu_set_thread_handler(struct thread *td, void (*retfunc)(void), void *func, void *arg);
577 int fork1 (struct lwp *, int, struct proc **);
578 void start_forked_proc (struct lwp *, struct proc *);
579 int trace_req (struct proc *);
580 void cpu_thread_wait (struct thread *);
581 void setsugid (void);
582 void faultin (struct proc *p);
583 void phold (struct proc *);
584 void prele (struct proc *);
585 int pwaitres_pending (struct proc *);
586 void pwaitres_set (struct proc *);
587 int pholdzomb (struct proc *);
588 void prelezomb (struct proc *);
589 void pstall (struct proc *, const char *, int);
590 void lwpuserret(struct lwp *);
591 void lwpkthreaddeferred(void);
592 void lwp_usermap(struct lwp *lp, int invfork);
593 void lwp_userunmap(struct lwp *lp);
594 void proc_usermap(struct proc *p, int invfork);
595 void proc_userunmap(struct proc *p);
596 void reaper_hold(struct sysreaper *reap);
597 void reaper_drop(struct sysreaper *reap);
598 int reaper_sigtest(struct proc *sender, struct proc *target, int reaper_ok);
599 struct sysreaper *reaper_exit(struct proc *p);
600 void reaper_init(struct proc *p, struct sysreaper *reap);
601 struct proc *reaper_get(struct sysreaper *reap);
602
603 u_int32_t procrunnable (void);
604
605 #endif /* _KERNEL */
606
607 #endif /* _KERNEL || _KERNEL_STRUCTURES */
608 #endif /* !_SYS_PROC_H_ */
609