FreeBSD/Linux Kernel Cross Reference
sys/sys/proc.h
1 /*-
2 * Copyright (c) 1986, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 * must display the following acknowledgement:
20 * This product includes software developed by the University of
21 * California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 * may be used to endorse or promote products derived from this software
24 * without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * @(#)proc.h 8.15 (Berkeley) 5/19/95
39 * $FreeBSD: releng/5.1/sys/sys/proc.h 115784 2003-06-03 20:43:18Z jeff $
40 */
41
42 #ifndef _SYS_PROC_H_
43 #define _SYS_PROC_H_
44
45 #include <sys/callout.h> /* For struct callout. */
46 #include <sys/event.h> /* For struct klist. */
47 #ifndef _KERNEL
48 #include <sys/filedesc.h>
49 #endif
50 #include <sys/_lock.h>
51 #include <sys/_mutex.h>
52 #include <sys/queue.h>
53 #include <sys/priority.h>
54 #include <sys/rtprio.h> /* XXX */
55 #include <sys/runq.h>
56 #include <sys/sigio.h>
57 #include <sys/signal.h>
58 #include <sys/_label.h>
59 #ifndef _KERNEL
60 #include <sys/time.h> /* For structs itimerval, timeval. */
61 #else
62 #include <sys/pcpu.h>
63 #endif
64 #include <sys/ucontext.h>
65 #include <sys/ucred.h>
66 #include <machine/proc.h> /* Machine-dependent proc substruct. */
67
68 /*
69 * One structure allocated per session.
70 *
71 * List of locks
72 * (m) locked by s_mtx mtx
73 * (e) locked by proctree_lock sx
74 * (c) const until freeing
75 */
76 struct session {
77 int s_count; /* (m) Ref cnt; pgrps in session. */
78 struct proc *s_leader; /* (m + e) Session leader. */
79 struct vnode *s_ttyvp; /* (m) Vnode of controlling tty. */
80 struct tty *s_ttyp; /* (m) Controlling tty. */
81 pid_t s_sid; /* (c) Session ID. */
82 /* (m) Setlogin() name: */
83 char s_login[roundup(MAXLOGNAME, sizeof(long))];
84 struct mtx s_mtx; /* Mutex to protect members */
85 };
86
87 /*
88 * One structure allocated per process group.
89 *
90 * List of locks
91 * (m) locked by pg_mtx mtx
92 * (e) locked by proctree_lock sx
93 * (c) const until freeing
94 */
95 struct pgrp {
96 LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */
97 LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */
98 struct session *pg_session; /* (c) Pointer to session. */
99 struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */
100 pid_t pg_id; /* (c) Pgrp id. */
101 int pg_jobc; /* (m) job cntl proc count */
102 struct mtx pg_mtx; /* Mutex to protect members */
103 };
104
105 /*
106 * pargs, used to hold a copy of the command line, if it had a sane length.
107 */
108 struct pargs {
109 u_int ar_ref; /* Reference count. */
110 u_int ar_length; /* Length. */
111 u_char ar_args[1]; /* Arguments. */
112 };
113
114 /*-
115 * Description of a process.
116 *
117 * This structure contains the information needed to manage a thread of
118 * control, known in UN*X as a process; it has references to substructures
119 * containing descriptions of things that the process uses, but may share
120 * with related processes. The process structure and the substructures
121 * are always addressable except for those marked "(CPU)" below,
122 * which might be addressable only on a processor on which the process
123 * is running.
124 *
125 * Below is a key of locks used to protect each member of struct proc. The
126 * lock is indicated by a reference to a specific character in parens in the
127 * associated comment.
128 * * - not yet protected
129 * a - only touched by curproc or parent during fork/wait
130 * b - created at fork, never changes
131 * (exception aiods switch vmspaces, but they are also
132 * marked 'P_SYSTEM' so hopefully it will be left alone)
133 * c - locked by proc mtx
134 * d - locked by allproc_lock lock
135 * e - locked by proctree_lock lock
136 * f - session mtx
137 * g - process group mtx
138 * h - callout_lock mtx
139 * i - by curproc or the master session mtx
140 * j - locked by sched_lock mtx
141 * k - only accessed by curthread
142 * l - the attaching proc or attaching proc parent
143 * m - Giant
144 * n - not locked, lazy
145 * o - ktrace lock
146 * p - select lock (sellock)
147 * r - p_peers lock
148 * x - created at fork, only changes during single threading in exec
149 * z - zombie threads/kse/ksegroup lock
150 *
151 * If the locking key specifies two identifiers (for example, p_pptr) then
152 * either lock is sufficient for read access, but both locks must be held
153 * for write access.
154 */
155 struct ithd;
156 struct ke_sched;
157 struct kg_sched;
158 struct nlminfo;
159 struct p_sched;
160 struct td_sched;
161 struct trapframe;
162
163 /*
164 * Here we define the four structures used for process information.
165 *
166 * The first is the thread. It might be though of as a "Kernel
167 * Schedulable Entity Context".
168 * This structure contains all the information as to where a thread of
169 * execution is now, or was when it was suspended, why it was suspended,
170 * and anything else that will be needed to restart it when it is
171 * rescheduled. Always associated with a KSE when running, but can be
172 * reassigned to an equivalent KSE when being restarted for
173 * load balancing. Each of these is associated with a kernel stack
174 * and a pcb.
175 *
176 * It is important to remember that a particular thread structure only
177 * exists as long as the system call or kernel entrance (e.g. by pagefault)
178 * which it is currently executing. It should therefore NEVER be referenced
179 * by pointers in long lived structures that live longer than a single
180 * request. If several threads complete their work at the same time,
181 * they will all rewind their stacks to the user boundary, report their
182 * completion state, and all but one will be freed. That last one will
183 * be kept to provide a kernel stack and pcb for the NEXT syscall or kernel
184 * entrance. (basically to save freeing and then re-allocating it) The KSE
185 * keeps a cached thread available to allow it to quickly
186 * get one when it needs a new one. There is also a system
187 * cache of free threads. Threads have priority and partake in priority
188 * inheritance schemes.
189 */
190 struct thread;
191
192 /*
193 * The second structure is the Kernel Schedulable Entity. (KSE)
194 * It represents the ability to take a slot in the scheduler queue.
195 * As long as this is scheduled, it could continue to run any threads that
196 * are assigned to the KSEGRP (see later) until either it runs out
197 * of runnable threads of high enough priority, or CPU.
198 * It runs on one CPU and is assigned a quantum of time. When a thread is
199 * blocked, The KSE continues to run and will search for another thread
200 * in a runnable state amongst those it has. It May decide to return to user
201 * mode with a new 'empty' thread if there are no runnable threads.
202 * Threads are temporarily associated with a KSE for scheduling reasons.
203 */
204 struct kse;
205
206 /*
207 * The KSEGRP is allocated resources across a number of CPUs.
208 * (Including a number of CPUxQUANTA. It parcels these QUANTA up among
209 * its KSEs, each of which should be running in a different CPU.
210 * BASE priority and total available quanta are properties of a KSEGRP.
211 * Multiple KSEGRPs in a single process compete against each other
212 * for total quanta in the same way that a forked child competes against
213 * it's parent process.
214 */
215 struct ksegrp;
216
217 /*
218 * A process is the owner of all system resources allocated to a task
219 * except CPU quanta.
220 * All KSEGs under one process see, and have the same access to, these
221 * resources (e.g. files, memory, sockets, permissions kqueues).
222 * A process may compete for CPU cycles on the same basis as a
223 * forked process cluster by spawning several KSEGRPs.
224 */
225 struct proc;
226
227 /***************
228 * In pictures:
229 With a single run queue used by all processors:
230
231 RUNQ: --->KSE---KSE--... SLEEPQ:[]---THREAD---THREAD---THREAD
232 | / []---THREAD
233 KSEG---THREAD--THREAD--THREAD []
234 []---THREAD---THREAD
235
236 (processors run THREADs from the KSEG until they are exhausted or
237 the KSEG exhausts its quantum)
238
239 With PER-CPU run queues:
240 KSEs on the separate run queues directly
241 They would be given priorities calculated from the KSEG.
242
243 *
244 *****************/
245
246 /*
247 * Kernel runnable context (thread).
248 * This is what is put to sleep and reactivated.
249 * The first KSE available in the correct group will run this thread.
250 * If several are available, use the one on the same CPU as last time.
251 * When waiting to be run, threads are hung off the KSEGRP in priority order.
252 * with N runnable and queued KSEs in the KSEGRP, the first N threads
253 * are linked to them. Other threads are not yet assigned.
254 */
255 struct thread {
256 struct proc *td_proc; /* (*) Associated process. */
257 struct ksegrp *td_ksegrp; /* (*) Associated KSEG. */
258 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc */
259 TAILQ_ENTRY(thread) td_kglist; /* (*) All threads in this ksegrp */
260
261 /* The two queues below should someday be merged */
262 TAILQ_ENTRY(thread) td_slpq; /* (j) Sleep queue. XXXKSE */
263 TAILQ_ENTRY(thread) td_lockq; /* (j) Lock queue. XXXKSE */
264 TAILQ_ENTRY(thread) td_runq; /* (j/z) Run queue(s). XXXKSE */
265
266 TAILQ_HEAD(, selinfo) td_selq; /* (p) List of selinfos. */
267
268 /* Cleared during fork1() or thread_sched_upcall() */
269 #define td_startzero td_flags
270 int td_flags; /* (j) TDF_* flags. */
271 int td_inhibitors; /* (j) Why can not run */
272 struct kse *td_last_kse; /* (j) Previous value of td_kse */
273 struct kse *td_kse; /* (j) Current KSE if running. */
274 int td_dupfd; /* (k) Ret value from fdopen. XXX */
275 void *td_wchan; /* (j) Sleep address. */
276 const char *td_wmesg; /* (j) Reason for sleep. */
277 u_char td_lastcpu; /* (j) Last cpu we were on. */
278 u_char td_inktr; /* (k) Currently handling a KTR. */
279 u_char td_inktrace; /* (k) Currently handling a KTRACE. */
280 u_char td_oncpu; /* (j) Which cpu we are on. */
281 short td_locks; /* (k) DEBUG: lockmgr count of locks */
282 struct mtx *td_blocked; /* (j) Mutex process is blocked on. */
283 struct ithd *td_ithd; /* (b) For interrupt threads only. */
284 const char *td_lockname; /* (j) Name of lock blocked on. */
285 LIST_HEAD(, mtx) td_contested; /* (j) Contested locks. */
286 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
287 int td_intr_nesting_level; /* (k) Interrupt recursion. */
288 struct kse_thr_mailbox *td_mailbox; /* (*) Userland mailbox address */
289 struct ucred *td_ucred; /* (k) Reference to credentials. */
290 void (*td_switchin)(void); /* (k) Switchin special func. */
291 struct thread *td_standin; /* (*) Use this for an upcall */
292 u_int td_prticks; /* (*) Profclock hits in sys for user */
293 struct kse_upcall *td_upcall; /* (*) Upcall structure. */
294 u_int64_t td_sticks; /* (j) Statclock hits in system mode. */
295 u_int td_uuticks; /* (*) Statclock hits in user, for UTS */
296 u_int td_usticks; /* (*) Statclock hits in kernel, for UTS */
297 u_int td_critnest; /* (k) Critical section nest level. */
298 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */
299 sigset_t td_sigmask; /* (c) Current signal mask. */
300 sigset_t td_siglist; /* (c) Sigs arrived, not delivered. */
301 TAILQ_ENTRY(thread) td_umtx; /* (c?) Link for when we're blocked. */
302
303 #define td_endzero td_base_pri
304
305 /* Copied during fork1() or thread_sched_upcall() */
306 #define td_startcopy td_endzero
307 u_char td_base_pri; /* (j) Thread base kernel priority. */
308 u_char td_priority; /* (j) Thread active priority. */
309 #define td_endcopy td_pcb
310
311 /*
312 * fields that must be manually set in fork1() or thread_sched_upcall()
313 * or already have been set in the allocator, contstructor, etc..
314 */
315 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
316 enum {
317 TDS_INACTIVE = 0x0,
318 TDS_INHIBITED,
319 TDS_CAN_RUN,
320 TDS_RUNQ,
321 TDS_RUNNING
322 } td_state;
323 register_t td_retval[2]; /* (k) Syscall aux returns. */
324 struct callout td_slpcallout; /* (h) Callout for sleep. */
325 struct trapframe *td_frame; /* (k) */
326 struct vm_object *td_kstack_obj;/* (a) Kstack object. */
327 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
328 int td_kstack_pages; /* (a) Size of the kstack */
329 struct vm_object *td_altkstack_obj;/* (a) Alternate kstack object. */
330 vm_offset_t td_altkstack; /* (a) Kernel VA of alternate kstack. */
331 int td_altkstack_pages; /* (a) Size of the alternate kstack */
332 struct mdthread td_md; /* (k) Any machine-dependent fields. */
333 struct td_sched *td_sched; /* (*) Scheduler specific data */
334 };
335 /* flags kept in td_flags */
336 #define TDF_OLDMASK 0x000001 /* Need to restore mask after suspend. */
337 #define TDF_INPANIC 0x000002 /* Caused a panic, let it drive crashdump. */
338 #define TDF_CAN_UNBIND 0x000004 /* Only temporarily bound. */
339 #define TDF_SINTR 0x000008 /* Sleep is interruptible. */
340 #define TDF_TIMEOUT 0x000010 /* Timing out during sleep. */
341 #define TDF_IDLETD 0x000020 /* This is one of the per-CPU idle threads */
342 #define TDF_SELECT 0x000040 /* Selecting; wakeup/waiting danger. */
343 #define TDF_CVWAITQ 0x000080 /* Thread is on a cv_waitq (not slpq). */
344 #define TDF_UPCALLING 0x000100 /* This thread is doing an upcall. */
345 #define TDF_ONSLEEPQ 0x000200 /* On the sleep queue. */
346 #define TDF_ASTPENDING 0x000800 /* Thread has some asynchronous events. */
347 #define TDF_TIMOFAIL 0x001000 /* Timeout from sleep after we were awake. */
348 #define TDF_INTERRUPT 0x002000 /* Thread is marked as interrupted. */
349 #define TDF_USTATCLOCK 0x004000 /* Stat clock hits in userland. */
350 #define TDF_OWEUPC 0x008000 /* Owe thread an addupc() call at next AST. */
351 #define TDF_NEEDRESCHED 0x010000 /* Thread needs to yield. */
352 #define TDF_NEEDSIGCHK 0x020000 /* Thread may need signal delivery. */
353 #define TDF_DEADLKTREAT 0x800000 /* Lock aquisition - deadlock treatment. */
354
355 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */
356 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
357 #define TDI_SWAPPED 0x0004 /* Stack not in mem.. bad juju if run. */
358 #define TDI_LOCK 0x0008 /* Stopped on a lock. */
359 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
360
361 #define TD_CAN_UNBIND(td) \
362 (((td)->td_flags & TDF_CAN_UNBIND) == TDF_CAN_UNBIND && \
363 ((td)->td_upcall != NULL))
364
365 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
366 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
367 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
368 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
369 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
370 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
371 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
372 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
373 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
374 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
375
376 #define TD_SET_INHIB(td, inhib) do { \
377 (td)->td_state = TDS_INHIBITED; \
378 (td)->td_inhibitors |= (inhib); \
379 } while (0)
380
381 #define TD_CLR_INHIB(td, inhib) do { \
382 if (((td)->td_inhibitors & (inhib)) && \
383 (((td)->td_inhibitors &= ~(inhib)) == 0)) \
384 (td)->td_state = TDS_CAN_RUN; \
385 } while (0)
386
387 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
388 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
389 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
390 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
391 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
392 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
393
394 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
395 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
396 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
397 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
398 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
399
400 #define TD_SET_RUNNING(td) do {(td)->td_state = TDS_RUNNING; } while (0)
401 #define TD_SET_RUNQ(td) do {(td)->td_state = TDS_RUNQ; } while (0)
402 #define TD_SET_CAN_RUN(td) do {(td)->td_state = TDS_CAN_RUN; } while (0)
403 #define TD_SET_ON_SLEEPQ(td) do {(td)->td_flags |= TDF_ONSLEEPQ; } while (0)
404 #define TD_CLR_ON_SLEEPQ(td) do { \
405 (td)->td_flags &= ~TDF_ONSLEEPQ; \
406 (td)->td_wchan = NULL; \
407 } while (0)
408
409 /*
410 * The schedulable entity that can be given a context to run.
411 * A process may have several of these. Probably one per processor
412 * but posibly a few more. In this universe they are grouped
413 * with a KSEG that contains the priority and niceness
414 * for the group.
415 */
416 struct kse {
417 struct proc *ke_proc; /* (*) Associated process. */
418 struct ksegrp *ke_ksegrp; /* (*) Associated KSEG. */
419 TAILQ_ENTRY(kse) ke_kglist; /* (*) Queue of KSEs in ke_ksegrp. */
420 TAILQ_ENTRY(kse) ke_kgrlist; /* (*) Queue of KSEs in this state. */
421 TAILQ_ENTRY(kse) ke_procq; /* (j/z) Run queue. */
422
423 #define ke_startzero ke_flags
424 int ke_flags; /* (j) KEF_* flags. */
425 struct thread *ke_thread; /* (*) Active associated thread. */
426 fixpt_t ke_pctcpu; /* (j) %cpu during p_swtime. */
427 u_char ke_oncpu; /* (j) Which cpu we are on. */
428 char ke_rqindex; /* (j) Run queue index. */
429 enum {
430 KES_UNUSED = 0x0,
431 KES_IDLE,
432 KES_ONRUNQ,
433 KES_UNQUEUED, /* in transit */
434 KES_THREAD /* slaved to thread state */
435 } ke_state; /* (j) KSE status. */
436 #define ke_endzero ke_dummy
437 u_char ke_dummy;
438 struct ke_sched *ke_sched; /* (*) Scheduler specific data */
439 };
440
441 /* flags kept in ke_flags */
442 #define KEF_DIDRUN 0x02000 /* KSE actually ran. */
443 #define KEF_EXIT 0x04000 /* KSE is being killed. */
444
445 /*
446 * The upcall management structure.
447 * The upcall is used when returning to userland. If a thread does not have
448 * an upcall on return to userland the thread exports its context and exits.
449 */
450 struct kse_upcall {
451 TAILQ_ENTRY(kse_upcall) ku_link; /* List of upcalls in KSEG. */
452 struct ksegrp *ku_ksegrp; /* Associated KSEG. */
453 struct thread *ku_owner; /* owning thread */
454 int ku_flags; /* KUF_* flags. */
455 struct kse_mailbox *ku_mailbox; /* userland mailbox address. */
456 stack_t ku_stack; /* userland upcall stack. */
457 void *ku_func; /* userland upcall function. */
458 unsigned int ku_mflags; /* cached upcall mailbox flags */
459 };
460
461 #define KUF_DOUPCALL 0x00001 /* Do upcall now, don't wait */
462
463 /*
464 * Kernel-scheduled entity group (KSEG). The scheduler considers each KSEG to
465 * be an indivisible unit from a time-sharing perspective, though each KSEG may
466 * contain multiple KSEs.
467 */
468 struct ksegrp {
469 struct proc *kg_proc; /* (*) Process that contains this KSEG. */
470 TAILQ_ENTRY(ksegrp) kg_ksegrp; /* (*) Queue of KSEGs in kg_proc. */
471 TAILQ_HEAD(, kse) kg_kseq; /* (ke_kglist) All KSEs. */
472 TAILQ_HEAD(, kse) kg_iq; /* (ke_kgrlist) All idle KSEs. */
473 TAILQ_HEAD(, thread) kg_threads;/* (td_kglist) All threads. */
474 TAILQ_HEAD(, thread) kg_runq; /* (td_runq) waiting RUNNABLE threads */
475 TAILQ_HEAD(, thread) kg_slpq; /* (td_runq) NONRUNNABLE threads. */
476 TAILQ_HEAD(, kse_upcall) kg_upcalls; /* All upcalls in the group */
477 #define kg_startzero kg_estcpu
478 u_int kg_estcpu; /* (j) Sum of the same field in KSEs. */
479 u_int kg_slptime; /* (j) How long completely blocked. */
480 struct thread *kg_last_assigned; /* (j) Last thread assigned to a KSE. */
481 int kg_runnable; /* (j) Num runnable threads on queue. */
482 int kg_runq_kses; /* (j) Num KSEs on runq. */
483 int kg_idle_kses; /* (j) Num KSEs on iq */
484 int kg_numupcalls; /* (j) Num upcalls */
485 int kg_upsleeps; /* (c) Num threads in kse_release() */
486 struct kse_thr_mailbox *kg_completed; /* (c) Completed thread mboxes. */
487 int kg_nextupcall; /* (*) Next upcall time */
488 int kg_upquantum; /* (*) Quantum to schedule an upcall */
489 #define kg_endzero kg_pri_class
490
491 #define kg_startcopy kg_endzero
492 u_char kg_pri_class; /* (j) Scheduling class. */
493 u_char kg_user_pri; /* (j) User pri from estcpu and nice. */
494 char kg_nice; /* (c + j) Process "nice" value. */
495 #define kg_endcopy kg_numthreads
496 int kg_numthreads; /* (j) Num threads in total */
497 int kg_kses; /* (j) Num KSEs in group. */
498 struct kg_sched *kg_sched; /* (*) Scheduler specific data */
499 };
500
501 /*
502 * The old fashionned process. May have multiple threads, KSEGRPs
503 * and KSEs. Starts off with a single embedded KSEGRP, KSE and THREAD.
504 */
505 struct proc {
506 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
507 TAILQ_HEAD(, ksegrp) p_ksegrps; /* (kg_ksegrp) All KSEGs. */
508 TAILQ_HEAD(, thread) p_threads; /* (td_plist) Threads. (shortcut) */
509 TAILQ_HEAD(, thread) p_suspended; /* (td_runq) Suspended threads. */
510 struct ucred *p_ucred; /* (c) Process owner's identity. */
511 struct filedesc *p_fd; /* (b) Ptr to open files structure. */
512 /* Accumulated stats for all KSEs? */
513 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
514 struct plimit *p_limit; /* (c*) Process limits. */
515 struct vm_object *p_upages_obj; /* (a) Upages object. */
516 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */
517
518 /*struct ksegrp p_ksegrp;
519 struct kse p_kse; */
520
521 /*
522 * The following don't make too much sense..
523 * See the td_ or ke_ versions of the same flags
524 */
525 int p_flag; /* (c) P_* flags. */
526 int p_sflag; /* (j) PS_* flags. */
527 enum {
528 PRS_NEW = 0, /* In creation */
529 PRS_NORMAL, /* KSEs can be run */
530 PRS_ZOMBIE
531 } p_state; /* (j/c) S* process status. */
532 pid_t p_pid; /* (b) Process identifier. */
533 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
534 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
535 struct proc *p_pptr; /* (c + e) Pointer to parent process. */
536 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
537 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
538 struct mtx p_mtx; /* (n) Lock for this struct. */
539
540 /* The following fields are all zeroed upon creation in fork. */
541 #define p_startzero p_oppid
542 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */
543 struct vmspace *p_vmspace; /* (b) Address space. */
544 u_int p_swtime; /* (j) Time swapped in or out. */
545 struct itimerval p_realtimer; /* (c) Alarm timer. */
546 struct bintime p_runtime; /* (j) Real time. */
547 u_int64_t p_uu; /* (j) Previous user time in usec. */
548 u_int64_t p_su; /* (j) Previous system time in usec. */
549 u_int64_t p_iu; /* (j) Previous intr time in usec. */
550 u_int64_t p_uticks; /* (j) Statclock hits in user mode. */
551 u_int64_t p_sticks; /* (j) Statclock hits in system mode. */
552 u_int64_t p_iticks; /* (j) Statclock hits in intr. */
553 int p_profthreads; /* (c) Num threads in addupc_task */
554 int p_maxthrwaits; /* (c) Max threads num waiters */
555 int p_traceflag; /* (o) Kernel trace points. */
556 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */
557 struct ucred *p_tracecred; /* (o) Credentials to trace with. */
558 struct vnode *p_textvp; /* (b) Vnode of executable. */
559 sigset_t p_siglist; /* (c) Sigs not delivered to a td. */
560 char p_lock; /* (c) Proclock (prevent swap) count. */
561 struct klist p_klist; /* (c) Knotes attached to this proc. */
562 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
563 int p_sigparent; /* (c) Signal to parent on exit. */
564 int p_sig; /* (n) For core dump/debugger XXX. */
565 u_long p_code; /* (n) For core dump/debugger XXX. */
566 u_int p_stops; /* (c) Stop event bitmask. */
567 u_int p_stype; /* (c) Stop event type. */
568 char p_step; /* (c) Process is stopped. */
569 u_char p_pfsflags; /* (c) Procfs flags. */
570 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
571 void *p_aioinfo; /* (?) ASYNC I/O info. */
572 struct thread *p_singlethread;/* (c + j) If single threading this is it */
573 int p_suspcount; /* (c) # threads in suspended mode */
574 /* End area that is zeroed on creation. */
575 #define p_endzero p_sigstk
576
577 /* The following fields are all copied upon creation in fork. */
578 #define p_startcopy p_endzero
579 stack_t p_sigstk; /* (c) Stack ptr and on-stack flag. */
580 u_int p_magic; /* (b) Magic number. */
581 char p_comm[MAXCOMLEN + 1]; /* (b) Process name. */
582 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
583 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
584 struct pargs *p_args; /* (c) Process arguments. */
585 rlim_t p_cpulimit; /* (j) Current CPU limit in seconds. */
586 /* End area that is copied on creation. */
587 #define p_endcopy p_xstat
588
589 u_short p_xstat; /* (c) Exit status; also stop sig. */
590 int p_numthreads; /* (j) Number of threads. */
591 int p_numksegrps; /* (?) number of ksegrps */
592 struct mdproc p_md; /* Any machine-dependent fields. */
593 struct callout p_itcallout; /* (h + c) Interval timer callout. */
594 struct user *p_uarea; /* (k) Kernel VA of u-area (CPU) */
595 u_short p_acflag; /* (c) Accounting flags. */
596 struct rusage *p_ru; /* (a) Exit information. XXX */
597 struct proc *p_peers; /* (r) */
598 struct proc *p_leader; /* (b) */
599 void *p_emuldata; /* (c) Emulator state data. */
600 struct label p_label; /* (*) Process (not subject) MAC label */
601 struct p_sched *p_sched; /* (*) Scheduler specific data */
602 };
603
604 #define p_rlimit p_limit->pl_rlimit
605 #define p_session p_pgrp->pg_session
606 #define p_pgid p_pgrp->pg_id
607
608 #define NOCPU 0xff /* For when we aren't on a CPU. (SMP) */
609
610 /* Status values (p_stat). */
611
612 /* These flags are kept in p_flag. */
613 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
614 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
615 #define P_KTHREAD 0x00004 /* Kernel thread. (*)*/
616 #define P_NOLOAD 0x00008 /* Ignore during load avg calculations. */
617 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
618 #define P_PROFIL 0x00020 /* Has started profiling. */
619 #define P_STOPPROF 0x00040 /* Has thread in requesting to stop prof */
620 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
621 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
622 #define P_WAITED 0x01000 /* Someone is waiting for us */
623 #define P_WEXIT 0x02000 /* Working on exiting. */
624 #define P_EXEC 0x04000 /* Process called exec. */
625 #define P_THREADED 0x08000 /* Process is using threads. */
626 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
627 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
628
629 /* flags that control how threads may be suspended for some reason */
630 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP */
631 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing */
632 #define P_STOPPED_SINGLE 0x80000 /* Only one thread can continue */
633 /* (not to user) */
634 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, */
635 /* not wait */
636 #define P_TRACED 0x00800 /* Debugged process being traced. */
637 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
638 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
639
640 /* Should be moved to machine-dependent areas. */
641 #define P_COWINPROGRESS 0x400000 /* Snapshot copy-on-write in progress. */
642
643 #define P_JAILED 0x1000000 /* Process is in jail. */
644 #define P_ALTSTACK 0x2000000 /* Have alternate signal stack. */
645 #define P_INEXEC 0x4000000 /* Process is in execve(). */
646
647 /* These flags are kept in p_sflag and are protected with sched_lock. */
648 #define PS_INMEM 0x00001 /* Loaded into memory. */
649 #define PS_XCPU 0x00002 /* Exceeded CPU limit. */
650 #define PS_ALRMPEND 0x00020 /* Pending SIGVTALRM needs to be posted. */
651 #define PS_PROFPEND 0x00040 /* Pending SIGPROF needs to be posted. */
652 #define PS_SWAPINREQ 0x00100 /* Swapin request due to wakeup. */
653 #define PS_SWAPPINGOUT 0x00200 /* Process is being swapped out. */
654 #define PS_SWAPPINGIN 0x04000 /* Process is being swapped in. */
655 #define PS_MACPEND 0x08000 /* Ast()-based MAC event pending. */
656
657 /* used only in legacy conversion code */
658 #define SIDL 1 /* Process being created by fork. */
659 #define SRUN 2 /* Currently runnable. */
660 #define SSLEEP 3 /* Sleeping on an address. */
661 #define SSTOP 4 /* Process debugging or suspension. */
662 #define SZOMB 5 /* Awaiting collection by parent. */
663 #define SWAIT 6 /* Waiting for interrupt. */
664 #define SLOCK 7 /* Blocked on a lock. */
665
666 #define P_MAGIC 0xbeefface
667
668 #ifdef _KERNEL
669
670 #ifdef MALLOC_DECLARE
671 MALLOC_DECLARE(M_PARGS);
672 MALLOC_DECLARE(M_PGRP);
673 MALLOC_DECLARE(M_SESSION);
674 MALLOC_DECLARE(M_SUBPROC);
675 MALLOC_DECLARE(M_ZOMBIE);
676 #endif
677
678 #define FOREACH_PROC_IN_SYSTEM(p) \
679 LIST_FOREACH((p), &allproc, p_list)
680 #define FOREACH_KSEGRP_IN_PROC(p, kg) \
681 TAILQ_FOREACH((kg), &(p)->p_ksegrps, kg_ksegrp)
682 #define FOREACH_THREAD_IN_GROUP(kg, td) \
683 TAILQ_FOREACH((td), &(kg)->kg_threads, td_kglist)
684 #define FOREACH_KSE_IN_GROUP(kg, ke) \
685 TAILQ_FOREACH((ke), &(kg)->kg_kseq, ke_kglist)
686 #define FOREACH_UPCALL_IN_GROUP(kg, ku) \
687 TAILQ_FOREACH((ku), &(kg)->kg_upcalls, ku_link)
688 #define FOREACH_THREAD_IN_PROC(p, td) \
689 TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
690
691 /* XXXKSE the lines below should probably only be used in 1:1 code */
692 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&p->p_threads)
693 #define FIRST_KSEGRP_IN_PROC(p) TAILQ_FIRST(&p->p_ksegrps)
694 #define FIRST_KSE_IN_KSEGRP(kg) TAILQ_FIRST(&kg->kg_kseq)
695 #define FIRST_KSE_IN_PROC(p) FIRST_KSE_IN_KSEGRP(FIRST_KSEGRP_IN_PROC(p))
696
697 /*
698 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
699 * as it is used to represent "no process group".
700 */
701 #define PID_MAX 99999
702 #define NO_PID 100000
703
704 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
705 #define SESSHOLD(s) ((s)->s_count++)
706 #define SESSRELE(s) { \
707 if (--(s)->s_count == 0) \
708 FREE(s, M_SESSION); \
709 }
710
711 #define STOPEVENT(p, e, v) do { \
712 PROC_LOCK(p); \
713 _STOPEVENT((p), (e), (v)); \
714 PROC_UNLOCK(p); \
715 } while (0)
716 #define _STOPEVENT(p, e, v) do { \
717 PROC_LOCK_ASSERT(p, MA_OWNED); \
718 if ((p)->p_stops & (e)) { \
719 stopevent((p), (e), (v)); \
720 } \
721 } while (0)
722
723 /* Lock and unlock a process. */
724 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
725 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
726 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
727 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
728 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
729
730 /* Lock and unlock a process group. */
731 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
732 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
733 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
734 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
735
736 #define PGRP_LOCK_PGSIGNAL(pg) \
737 do { \
738 if ((pg) != NULL) \
739 PGRP_LOCK(pg); \
740 } while (0);
741
742 #define PGRP_UNLOCK_PGSIGNAL(pg) \
743 do { \
744 if ((pg) != NULL) \
745 PGRP_UNLOCK(pg); \
746 } while (0);
747
748 /* Lock and unlock a session. */
749 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
750 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
751 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
752 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
753
754 /* Hold process U-area in memory, normally for ptrace/procfs work. */
755 #define PHOLD(p) do { \
756 PROC_LOCK(p); \
757 _PHOLD(p); \
758 PROC_UNLOCK(p); \
759 } while (0)
760 #define _PHOLD(p) do { \
761 PROC_LOCK_ASSERT((p), MA_OWNED); \
762 (p)->p_lock++; \
763 if (((p)->p_sflag & PS_INMEM) == 0) \
764 faultin((p)); \
765 } while (0)
766
767 #define PRELE(p) do { \
768 PROC_LOCK((p)); \
769 _PRELE((p)); \
770 PROC_UNLOCK((p)); \
771 } while (0)
772 #define _PRELE(p) do { \
773 PROC_LOCK_ASSERT((p), MA_OWNED); \
774 (--(p)->p_lock); \
775 } while (0)
776
777 /* Check whether a thread is safe to be swapped out. */
778 #define thread_safetoswapout(td) (TD_IS_SLEEPING(td) || TD_IS_SUSPENDED(td))
779
780 /* Lock and unlock process arguments. */
781 #define PARGS_LOCK(p) mtx_lock(&pargs_ref_lock)
782 #define PARGS_UNLOCK(p) mtx_unlock(&pargs_ref_lock)
783
784 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
785 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
786 extern u_long pidhash;
787
788 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
789 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
790 extern u_long pgrphash;
791
792 extern struct sx allproc_lock;
793 extern struct sx proctree_lock;
794 extern struct mtx pargs_ref_lock;
795 extern struct mtx ppeers_lock;
796 extern struct proc proc0; /* Process slot for swapper. */
797 extern struct thread thread0; /* Primary thread in proc0 */
798 extern struct ksegrp ksegrp0; /* Primary ksegrp in proc0 */
799 extern struct kse kse0; /* Primary kse in proc0 */
800 extern struct vmspace vmspace0; /* VM space for proc0. */
801 extern int hogticks; /* Limit on kernel cpu hogs. */
802 extern int nprocs, maxproc; /* Current and max number of procs. */
803 extern int maxprocperuid; /* Max procs per uid. */
804 extern u_long ps_arg_cache_limit;
805 extern int ps_argsopen;
806 extern int ps_showallprocs;
807 extern int sched_quantum; /* Scheduling quantum in ticks. */
808
809 LIST_HEAD(proclist, proc);
810 TAILQ_HEAD(procqueue, proc);
811 TAILQ_HEAD(threadqueue, thread);
812 extern struct proclist allproc; /* List of all processes. */
813 extern struct proclist zombproc; /* List of zombie processes. */
814 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
815 extern struct proc *updateproc; /* Process slot for syncer (sic). */
816
817 extern struct uma_zone *proc_zone;
818
819 extern int lastpid;
820
821 struct proc *pfind(pid_t); /* Find process by id. */
822 struct pgrp *pgfind(pid_t); /* Find process group by id. */
823 struct proc *zpfind(pid_t); /* Find zombie process by id. */
824
825 void adjustrunqueue(struct thread *, int newpri);
826 void ast(struct trapframe *framep);
827 struct thread *choosethread(void);
828 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
829 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, struct session *sess);
830 int enterthispgrp(struct proc *p, struct pgrp *pgrp);
831 void faultin(struct proc *p);
832 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
833 int fork1(struct thread *, int, int, struct proc **);
834 void fork_exit(void (*)(void *, struct trapframe *), void *,
835 struct trapframe *);
836 void fork_return(struct thread *, struct trapframe *);
837 int inferior(struct proc *p);
838 int leavepgrp(struct proc *p);
839 void mi_switch(void);
840 int p_candebug(struct thread *td, struct proc *p);
841 int p_cansee(struct thread *td, struct proc *p);
842 int p_cansched(struct thread *td, struct proc *p);
843 int p_cansignal(struct thread *td, struct proc *p, int signum);
844 struct pargs *pargs_alloc(int len);
845 void pargs_drop(struct pargs *pa);
846 void pargs_free(struct pargs *pa);
847 void pargs_hold(struct pargs *pa);
848 void procinit(void);
849 void threadinit(void);
850 void proc_linkup(struct proc *p, struct ksegrp *kg,
851 struct kse *ke, struct thread *td);
852 void proc_reparent(struct proc *child, struct proc *newparent);
853 int securelevel_ge(struct ucred *cr, int level);
854 int securelevel_gt(struct ucred *cr, int level);
855 void setrunnable(struct thread *);
856 void setrunqueue(struct thread *);
857 void setsugid(struct proc *p);
858 int sigonstack(size_t sp);
859 void sleepinit(void);
860 void stopevent(struct proc *, u_int, u_int);
861 void cpu_idle(void);
862 #if !defined(__alpha__) && !defined(__powerpc__)
863 void cpu_switch(struct thread *old, struct thread *new);
864 void cpu_throw(struct thread *old, struct thread *new) __dead2;
865 #else
866 void cpu_switch(void);
867 void cpu_throw(void) __dead2;
868 #endif
869 void unsleep(struct thread *);
870 void userret(struct thread *, struct trapframe *, u_int);
871
872 void cpu_exit(struct thread *);
873 void cpu_sched_exit(struct thread *);
874 void exit1(struct thread *, int) __dead2;
875 void cpu_fork(struct thread *, struct proc *, struct thread *, int);
876 void cpu_set_fork_handler(struct thread *, void (*)(void *), void *);
877 void cpu_wait(struct proc *);
878
879 /* New in KSE. */
880 struct ksegrp *ksegrp_alloc(void);
881 void ksegrp_free(struct ksegrp *kg);
882 void ksegrp_stash(struct ksegrp *kg);
883 struct kse *kse_alloc(void);
884 void kse_free(struct kse *ke);
885 void kse_stash(struct kse *ke);
886 void cpu_set_upcall(struct thread *td, void *pcb);
887 void cpu_set_upcall_kse(struct thread *td, struct kse_upcall *ku);
888 void cpu_thread_clean(struct thread *);
889 void cpu_thread_exit(struct thread *);
890 void cpu_thread_setup(struct thread *td);
891 void kse_reassign(struct kse *ke);
892 void kse_link(struct kse *ke, struct ksegrp *kg);
893 void kse_unlink(struct kse *ke);
894 void ksegrp_link(struct ksegrp *kg, struct proc *p);
895 void ksegrp_unlink(struct ksegrp *kg);
896 void thread_signal_add(struct thread *td, int sig);
897 void thread_signal_upcall(struct thread *td);
898 struct thread *thread_alloc(void);
899 void thread_exit(void) __dead2;
900 int thread_export_context(struct thread *td);
901 void thread_free(struct thread *td);
902 void thread_getcontext(struct thread *td, ucontext_t *uc);
903 void thread_link(struct thread *td, struct ksegrp *kg);
904 void thread_reap(void);
905 struct thread *thread_schedule_upcall(struct thread *td, struct kse_upcall *ku);
906 int thread_setcontext(struct thread *td, ucontext_t *uc);
907 int thread_single(int how);
908 #define SINGLE_NO_EXIT 0 /* values for 'how' */
909 #define SINGLE_EXIT 1
910 void thread_single_end(void);
911 void thread_stash(struct thread *td);
912 int thread_suspend_check(int how);
913 void thread_suspend_one(struct thread *td);
914 void thread_unlink(struct thread *td);
915 void thread_unsuspend(struct proc *p);
916 void thread_unsuspend_one(struct thread *td);
917 int thread_userret(struct thread *td, struct trapframe *frame);
918 void thread_user_enter(struct proc *p, struct thread *td);
919 void thread_wait(struct proc *p);
920 int thread_statclock(int user);
921 struct kse_upcall *upcall_alloc(void);
922 void upcall_free(struct kse_upcall *ku);
923 void upcall_link(struct kse_upcall *ku, struct ksegrp *kg);
924 void upcall_unlink(struct kse_upcall *ku);
925 void upcall_remove(struct thread *td);
926 void upcall_stash(struct kse_upcall *ke);
927 void thread_sanity_check(struct thread *td, char *);
928 void thread_stopped(struct proc *p);
929 void thread_switchout(struct thread *td);
930 void thr_exit1(void);
931 #endif /* _KERNEL */
932
933 #endif /* !_SYS_PROC_H_ */
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