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/5.0/sys/sys/proc.h 107719 2002-12-10 02:33:45Z julian $
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 #include <sys/filedesc.h>
48 #include <sys/queue.h>
49 #include <sys/priority.h>
50 #include <sys/rtprio.h> /* XXX */
51 #include <sys/runq.h>
52 #include <sys/signal.h>
53 #include <sys/_label.h>
54 #ifndef _KERNEL
55 #include <sys/time.h> /* For structs itimerval, timeval. */
56 #else
57 #include <sys/pcpu.h>
58 #endif
59 #include <sys/ucontext.h>
60 #include <sys/ucred.h>
61 #include <machine/proc.h> /* Machine-dependent proc substruct. */
62
63 /*
64 * One structure allocated per session.
65 *
66 * List of locks
67 * (m) locked by s_mtx mtx
68 * (e) locked by proctree_lock sx
69 * (c) const until freeing
70 */
71 struct session {
72 int s_count; /* (m) Ref cnt; pgrps in session. */
73 struct proc *s_leader; /* (m + e) Session leader. */
74 struct vnode *s_ttyvp; /* (m) Vnode of controlling tty. */
75 struct tty *s_ttyp; /* (m) Controlling tty. */
76 pid_t s_sid; /* (c) Session ID. */
77 /* (m) Setlogin() name: */
78 char s_login[roundup(MAXLOGNAME, sizeof(long))];
79 struct mtx s_mtx; /* Mutex to protect members */
80 };
81
82 /*
83 * One structure allocated per process group.
84 *
85 * List of locks
86 * (m) locked by pg_mtx mtx
87 * (e) locked by proctree_lock sx
88 * (c) const until freeing
89 */
90 struct pgrp {
91 LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */
92 LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */
93 struct session *pg_session; /* (c) Pointer to session. */
94 struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */
95 pid_t pg_id; /* (c) Pgrp id. */
96 int pg_jobc; /* (m) job cntl proc count */
97 struct mtx pg_mtx; /* Mutex to protect members */
98 };
99
100 struct procsig {
101 sigset_t ps_sigignore; /* Signals being ignored. */
102 sigset_t ps_sigcatch; /* Signals being caught by user. */
103 int ps_flag;
104 struct sigacts *ps_sigacts; /* Signal actions, state. */
105 int ps_refcnt;
106 };
107
108 #define PS_NOCLDWAIT 0x0001 /* No zombies if child dies */
109 #define PS_NOCLDSTOP 0x0002 /* No SIGCHLD when children stop. */
110 #define PS_CLDSIGIGN 0x0004 /* The SIGCHLD handler is SIG_IGN. */
111
112 /*
113 * pargs, used to hold a copy of the command line, if it had a sane length.
114 */
115 struct pargs {
116 u_int ar_ref; /* Reference count. */
117 u_int ar_length; /* Length. */
118 u_char ar_args[1]; /* Arguments. */
119 };
120
121 /*-
122 * Description of a process.
123 *
124 * This structure contains the information needed to manage a thread of
125 * control, known in UN*X as a process; it has references to substructures
126 * containing descriptions of things that the process uses, but may share
127 * with related processes. The process structure and the substructures
128 * are always addressable except for those marked "(CPU)" below,
129 * which might be addressable only on a processor on which the process
130 * is running.
131 *
132 * Below is a key of locks used to protect each member of struct proc. The
133 * lock is indicated by a reference to a specific character in parens in the
134 * associated comment.
135 * * - not yet protected
136 * a - only touched by curproc or parent during fork/wait
137 * b - created at fork, never changes
138 * (exception aiods switch vmspaces, but they are also
139 * marked 'P_SYSTEM' so hopefully it will be left alone)
140 * c - locked by proc mtx
141 * d - locked by allproc_lock lock
142 * e - locked by proctree_lock lock
143 * f - session mtx
144 * g - process group mtx
145 * h - callout_lock mtx
146 * i - by curproc or the master session mtx
147 * j - locked by sched_lock mtx
148 * k - only accessed by curthread
149 * l - the attaching proc or attaching proc parent
150 * m - Giant
151 * n - not locked, lazy
152 * o - ktrace lock
153 * p - select lock (sellock)
154 * r - p_peers lock
155 *
156 * If the locking key specifies two identifiers (for example, p_pptr) then
157 * either lock is sufficient for read access, but both locks must be held
158 * for write access.
159 */
160 struct ithd;
161 struct ke_sched;
162 struct kg_sched;
163 struct nlminfo;
164 struct p_sched;
165 struct td_sched;
166 struct trapframe;
167
168 /*
169 * Here we define the four structures used for process information.
170 *
171 * The first is the thread. It might be though of as a "Kernel
172 * Schedulable Entity Context".
173 * This structure contains all the information as to where a thread of
174 * execution is now, or was when it was suspended, why it was suspended,
175 * and anything else that will be needed to restart it when it is
176 * rescheduled. Always associated with a KSE when running, but can be
177 * reassigned to an equivalent KSE when being restarted for
178 * load balancing. Each of these is associated with a kernel stack
179 * and a pcb.
180 *
181 * It is important to remember that a particular thread structure only
182 * exists as long as the system call or kernel entrance (e.g. by pagefault)
183 * which it is currently executing. It should threfore NEVER be referenced
184 * by pointers in long lived structures that live longer than a single
185 * request. If several threads complete their work at the same time,
186 * they will all rewind their stacks to the user boundary, report their
187 * completion state, and all but one will be freed. That last one will
188 * be kept to provide a kernel stack and pcb for the NEXT syscall or kernel
189 * entrance. (basically to save freeing and then re-allocating it) The KSE
190 * keeps a cached thread available to allow it to quickly
191 * get one when it needs a new one. There is also a system
192 * cache of free threads. Threads have priority and partake in priority
193 * inherritance schemes.
194 */
195 struct thread;
196
197 /*
198 * The second structure is the Kernel Schedulable Entity. (KSE)
199 * It represents the ability to take a slot in the scheduler queue.
200 * As long as this is scheduled, it could continue to run any threads that
201 * are assigned to the KSEGRP (see later) until either it runs out
202 * of runnable threads of high enough priority, or CPU.
203 * It runs on one CPU and is assigned a quantum of time. When a thread is
204 * blocked, The KSE continues to run and will search for another thread
205 * in a runnable state amongst those it has. It May decide to return to user
206 * mode with a new 'empty' thread if there are no runnable threads.
207 * Threads are temporarily associated with a KSE for scheduling reasons.
208 */
209 struct kse;
210
211 /*
212 * The KSEGRP is allocated resources across a number of CPUs.
213 * (Including a number of CPUxQUANTA. It parcels these QUANTA up among
214 * Its KSEs, each of which should be running in a different CPU.
215 * BASE priority and total available quanta are properties of a KSEGRP.
216 * Multiple KSEGRPs in a single process compete against each other
217 * for total quanta in the same way that a forked child competes against
218 * it's parent process.
219 */
220 struct ksegrp;
221
222 /*
223 * A process is the owner of all system resources allocated to a task
224 * except CPU quanta.
225 * All KSEGs under one process see, and have the same access to, these
226 * resources (e.g. files, memory, sockets, permissions kqueues).
227 * A process may compete for CPU cycles on the same basis as a
228 * forked process cluster by spawning several KSEGRPs.
229 */
230 struct proc;
231
232 /***************
233 * In pictures:
234 With a single run queue used by all processors:
235
236 RUNQ: --->KSE---KSE--... SLEEPQ:[]---THREAD---THREAD---THREAD
237 | / []---THREAD
238 KSEG---THREAD--THREAD--THREAD []
239 []---THREAD---THREAD
240
241 (processors run THREADs from the KSEG until they are exhausted or
242 the KSEG exhausts its quantum)
243
244 With PER-CPU run queues:
245 KSEs on the separate run queues directly
246 They would be given priorities calculated from the KSEG.
247
248 *
249 *****************/
250
251 /*
252 * Kernel runnable context (thread).
253 * This is what is put to sleep and reactivated.
254 * The first KSE available in the correct group will run this thread.
255 * If several are available, use the one on the same CPU as last time.
256 * When waing to be run, threads are hung off the KSEGRP in priority order.
257 * with N runnable and queued KSEs in the KSEGRP, the first N threads
258 * are linked to them. Other threads are not yet assigned.
259 */
260 struct thread {
261 struct proc *td_proc; /* Associated process. */
262 struct ksegrp *td_ksegrp; /* Associated KSEG. */
263 TAILQ_ENTRY(thread) td_plist; /* All threads in this proc */
264 TAILQ_ENTRY(thread) td_kglist; /* All threads in this ksegrp */
265
266 /* The two queues below should someday be merged */
267 TAILQ_ENTRY(thread) td_slpq; /* (j) Sleep queue. XXXKSE */
268 TAILQ_ENTRY(thread) td_lockq; /* (j) Lock queue. XXXKSE */
269 TAILQ_ENTRY(thread) td_runq; /* (j) Run queue(s). XXXKSE */
270
271 TAILQ_HEAD(, selinfo) td_selq; /* (p) List of selinfos. */
272
273 /* Cleared during fork1() or thread_sched_upcall() */
274 #define td_startzero td_flags
275 int td_flags; /* (j) TDF_* flags. */
276 int td_inhibitors; /* (j) Why can not run */
277 struct kse *td_last_kse; /* (j) Previous value of td_kse */
278 struct kse *td_kse; /* (j) Current KSE if running. */
279 int td_dupfd; /* (k) Ret value from fdopen. XXX */
280 void *td_wchan; /* (j) Sleep address. */
281 const char *td_wmesg; /* (j) Reason for sleep. */
282 u_char td_lastcpu; /* (j) Last cpu we were on. */
283 u_char td_inktr; /* (k) Currently handling a KTR. */
284 u_char td_inktrace; /* (k) Currently handling a KTRACE. */
285 short td_locks; /* (k) DEBUG: lockmgr count of locks */
286 struct mtx *td_blocked; /* (j) Mutex process is blocked on. */
287 struct ithd *td_ithd; /* (b) For interrupt threads only. */
288 const char *td_lockname; /* (j) Name of lock blocked on. */
289 LIST_HEAD(, mtx) td_contested; /* (j) Contested locks. */
290 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
291 int td_intr_nesting_level; /* (k) Interrupt recursion. */
292 struct kse_thr_mailbox *td_mailbox; /* the userland mailbox address */
293 struct ucred *td_ucred; /* (k) Reference to credentials. */
294 void (*td_switchin)(void); /* (k) Switchin special func. */
295 struct thread *td_standin; /* (?) use this for an upcall */
296 u_int td_usticks; /* Statclock hits in kernel, for UTS */
297 u_int td_critnest; /* (k) Critical section nest level. */
298 #define td_endzero td_base_pri
299
300 /* Copied during fork1() or thread_sched_upcall() */
301 #define td_startcopy td_endzero
302 u_char td_base_pri; /* (j) Thread base kernel priority. */
303 u_char td_priority; /* (j) Thread active priority. */
304 #define td_endcopy td_pcb
305
306 /*
307 * fields that must be manually set in fork1() or thread_sched_upcall()
308 * or already have been set in the allocator, contstructor, etc..
309 */
310 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
311 enum {
312 TDS_INACTIVE = 0x20,
313 TDS_INHIBITED,
314 TDS_CAN_RUN,
315 TDS_RUNQ,
316 TDS_RUNNING
317 } td_state;
318 register_t td_retval[2]; /* (k) Syscall aux returns. */
319 struct callout td_slpcallout; /* (h) Callout for sleep. */
320 struct trapframe *td_frame; /* (k) */
321 struct vm_object *td_kstack_obj;/* (a) Kstack object. */
322 vm_offset_t td_kstack; /* Kernel VA of kstack. */
323 int td_kstack_pages; /* Size of the kstack */
324 struct vm_object *td_altkstack_obj;/* (a) Alternate kstack object. */
325 vm_offset_t td_altkstack; /* Kernel VA of alternate kstack. */
326 int td_altkstack_pages; /* Size of the alternate kstack */
327 struct mdthread td_md; /* (k) Any machine-dependent fields. */
328 struct td_sched *td_sched; /* Scheduler specific data */
329 };
330 /* flags kept in td_flags */
331 #define TDF_UNBOUND 0x000001 /* May give away the kse, uses the kg runq. */
332 #define TDF_INPANIC 0x000002 /* Caused a panic, let it drive crashdump. */
333 #define TDF_SINTR 0x000008 /* Sleep is interruptible. */
334 #define TDF_TIMEOUT 0x000010 /* Timing out during sleep. */
335 #define TDF_SELECT 0x000040 /* Selecting; wakeup/waiting danger. */
336 #define TDF_CVWAITQ 0x000080 /* Thread is on a cv_waitq (not slpq). */
337 #define TDF_UPCALLING 0x000100 /* This thread is doing an upcall. */
338 #define TDF_ONSLEEPQ 0x000200 /* On the sleep queue. */
339 #define TDF_INMSLEEP 0x000400 /* Don't recurse in msleep(). */
340 #define TDF_TIMOFAIL 0x001000 /* Timeout from sleep after we were awake. */
341 #define TDF_INTERRUPT 0x002000 /* Thread is marked as interrupted. */
342 #define TDF_DEADLKTREAT 0x800000 /* Lock aquisition - deadlock treatment. */
343
344 #define TDI_SUSPENDED 0x01 /* On suspension queue. */
345 #define TDI_SLEEPING 0x02 /* Actually asleep! (tricky). */
346 #define TDI_SWAPPED 0x04 /* Stack not in mem.. bad juju if run. */
347 #define TDI_LOCK 0x08 /* Stopped on a lock. */
348 #define TDI_IWAIT 0x10 /* Awaiting interrupt. */
349 #define TDI_LOAN 0x20 /* bound thread's KSE is lent */
350
351 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
352 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
353 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
354 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
355 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
356 #define TD_LENT(td) ((td)->td_inhibitors & TDI_LOAN)
357 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
358 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
359 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
360 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
361 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
362
363 #define TD_SET_INHIB(td, inhib) do { \
364 (td)->td_state = TDS_INHIBITED; \
365 (td)->td_inhibitors |= inhib; \
366 } while (0)
367
368 #define TD_CLR_INHIB(td, inhib) do { \
369 if (((td)->td_inhibitors & inhib) && \
370 (((td)->td_inhibitors &= ~inhib) == 0)) \
371 (td)->td_state = TDS_CAN_RUN; \
372 } while (0)
373
374 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
375 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
376 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
377 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
378 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
379 #define TD_SET_LOAN(td) TD_SET_INHIB((td), TDI_LOAN)
380
381 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
382 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
383 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
384 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
385 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
386 #define TD_CLR_LOAN(td) TD_CLR_INHIB((td), TDI_LOAN)
387
388 #define TD_SET_RUNNING(td) do {(td)->td_state = TDS_RUNNING; } while (0)
389 #define TD_SET_RUNQ(td) do {(td)->td_state = TDS_RUNQ; } while (0)
390 #define TD_SET_CAN_RUN(td) do {(td)->td_state = TDS_CAN_RUN; } while (0)
391 #define TD_SET_ON_SLEEPQ(td) do {(td)->td_flags |= TDF_ONSLEEPQ; } while (0)
392 #define TD_CLR_ON_SLEEPQ(td) do { \
393 (td)->td_flags &= ~TDF_ONSLEEPQ; \
394 (td)->td_wchan = NULL; \
395 } while (0)
396
397
398 /*
399 * Traps for young players:
400 * The main thread variable that controls whether a thread acts as a threaded
401 * or unthreaded thread is the td_bound counter (0 == unbound).
402 * UPCALLS run with the UNBOUND flags clear, after they are first scheduled.
403 * i.e. they bind themselves to whatever thread thay are first scheduled with.
404 * You may see BOUND threads in KSE processes but you should never see
405 * UNBOUND threads in non KSE processes.
406 */
407
408 /*
409 * The schedulable entity that can be given a context to run.
410 * A process may have several of these. Probably one per processor
411 * but posibly a few more. In this universe they are grouped
412 * with a KSEG that contains the priority and niceness
413 * for the group.
414 */
415 struct kse {
416 struct proc *ke_proc; /* Associated process. */
417 struct ksegrp *ke_ksegrp; /* Associated KSEG. */
418 TAILQ_ENTRY(kse) ke_kglist; /* Queue of all KSEs in ke_ksegrp. */
419 TAILQ_ENTRY(kse) ke_kgrlist; /* Queue of all KSEs in this state. */
420 TAILQ_ENTRY(kse) ke_procq; /* (j) Run queue. */
421
422 #define ke_startzero ke_flags
423 int ke_flags; /* (j) KEF_* flags. */
424 struct thread *ke_thread; /* Active associated thread. */
425 struct thread *ke_bound; /* Thread bound to this KSE (*) */
426 int ke_cpticks; /* (j) Ticks of cpu time. */
427 fixpt_t ke_pctcpu; /* (j) %cpu during p_swtime. */
428 u_int64_t ke_uu; /* (j) Previous user time in usec. */
429 u_int64_t ke_su; /* (j) Previous system time in usec. */
430 u_int64_t ke_iu; /* (j) Previous intr time in usec. */
431 u_int64_t ke_uticks; /* (j) Statclock hits in user mode. */
432 u_int64_t ke_sticks; /* (j) Statclock hits in system mode. */
433 u_int64_t ke_iticks; /* (j) Statclock hits in intr. */
434 u_int ke_uuticks; /* Statclock hits in user, for UTS */
435 u_int ke_usticks; /* Statclock hits in kernel, for UTS */
436 u_char ke_oncpu; /* (j) Which cpu we are on. */
437 char ke_rqindex; /* (j) Run queue index. */
438 enum {
439 KES_IDLE = 0x10,
440 KES_ONRUNQ,
441 KES_UNQUEUED, /* in transit */
442 KES_THREAD /* slaved to thread state */
443 } ke_state; /* (j) S* process status. */
444 struct kse_mailbox *ke_mailbox; /* the userland mailbox address */
445 stack_t ke_stack;
446 void *ke_upcall;
447 struct thread *ke_tdspare; /* spare thread for upcalls */
448 #define ke_endzero ke_dummy
449 u_char ke_dummy;
450 struct ke_sched *ke_sched; /* Scheduler specific data */
451 };
452
453 /* flags kept in ke_flags */
454 #define KEF_OWEUPC 0x00002 /* Owe process an addupc() call at next ast. */
455 #define KEF_IDLEKSE 0x00004 /* A 'Per CPU idle process'.. has one thread */
456 #define KEF_LOANED 0x00008 /* On loan from the bound thread to another */
457 #define KEF_USER 0x00200 /* Process is not officially in the kernel */
458 #define KEF_ASTPENDING 0x00400 /* KSE has a pending ast. */
459 #define KEF_NEEDRESCHED 0x00800 /* Process needs to yield. */
460 #define KEF_ONLOANQ 0x01000 /* KSE is on loan queue. */
461 #define KEF_DIDRUN 0x02000 /* KSE actually ran. */
462 #define KEF_EXIT 0x04000 /* KSE is being killed. */
463
464 /*
465 * (*) A bound KSE with a bound thread in a KSE process may be lent to
466 * Other threads, as long as those threads do not leave the kernel.
467 * The other threads must be either exiting, or be unbound with a valid
468 * mailbox so that they can save their state there rather than going
469 * to user space. While this happens the real bound thread is still linked
470 * to the kse via the ke_bound field, and the KSE has its "KEF_LOANED
471 * flag set.
472 */
473
474 /*
475 * Kernel-scheduled entity group (KSEG). The scheduler considers each KSEG to
476 * be an indivisible unit from a time-sharing perspective, though each KSEG may
477 * contain multiple KSEs.
478 */
479 struct ksegrp {
480 struct proc *kg_proc; /* Process that contains this KSEG. */
481 TAILQ_ENTRY(ksegrp) kg_ksegrp; /* Queue of KSEGs in kg_proc. */
482 TAILQ_HEAD(, kse) kg_kseq; /* (ke_kglist) All KSEs. */
483 TAILQ_HEAD(, kse) kg_iq; /* (ke_kgrlist) Idle KSEs. */
484 TAILQ_HEAD(, kse) kg_lq; /* (ke_kgrlist) Loan KSEs. */
485 TAILQ_HEAD(, thread) kg_threads;/* (td_kglist) All threads. */
486 TAILQ_HEAD(, thread) kg_runq; /* (td_runq) waiting RUNNABLE threads */
487 TAILQ_HEAD(, thread) kg_slpq; /* (td_runq) NONRUNNABLE threads. */
488
489 #define kg_startzero kg_estcpu
490 u_int kg_estcpu; /* Sum of the same field in KSEs. */
491 u_int kg_slptime; /* (j) How long completely blocked. */
492 struct thread *kg_last_assigned; /* Last thread assigned to a KSE */
493 int kg_runnable; /* Num runnable threads on queue. */
494 int kg_runq_kses; /* Num KSEs on runq. */
495 int kg_loan_kses; /* Num KSEs on loan queue. */
496 struct kse_thr_mailbox *kg_completed; /* (c) completed thread mboxes */
497 #define kg_endzero kg_pri_class
498
499 #define kg_startcopy kg_endzero
500 u_char kg_pri_class; /* (j) Scheduling class. */
501 u_char kg_user_pri; /* (j) User pri from estcpu and nice. */
502 char kg_nice; /* (j?/k?) Process "nice" value. */
503 #define kg_endcopy kg_numthreads
504 int kg_numthreads; /* Num threads in total */
505 int kg_idle_kses; /* num KSEs idle */
506 int kg_kses; /* Num KSEs in group. */
507 struct kg_sched *kg_sched; /* Scheduler specific data */
508 };
509
510 /*
511 * The old fashionned process. May have multiple threads, KSEGRPs
512 * and KSEs. Starts off with a single embedded KSEGRP, KSE and THREAD.
513 */
514 struct proc {
515 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
516 TAILQ_HEAD(, ksegrp) p_ksegrps; /* (kg_ksegrp) All KSEGs. */
517 TAILQ_HEAD(, thread) p_threads; /* (td_plist) Threads. (shortcut) */
518 TAILQ_HEAD(, thread) p_suspended; /* (td_runq) suspended threads */
519 struct ucred *p_ucred; /* (c) Process owner's identity. */
520 struct filedesc *p_fd; /* (b) Ptr to open files structure. */
521 /* Accumulated stats for all KSEs? */
522 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
523 struct plimit *p_limit; /* (m) Process limits. */
524 struct vm_object *p_upages_obj; /* (a) Upages object. */
525 struct procsig *p_procsig; /* (c) Signal actions, state (CPU). */
526
527 /*struct ksegrp p_ksegrp;
528 struct kse p_kse; */
529
530 /*
531 * The following don't make too much sense..
532 * See the td_ or ke_ versions of the same flags
533 */
534 int p_flag; /* (c) P_* flags. */
535 int p_sflag; /* (j) PS_* flags. */
536 enum {
537 PRS_NEW = 0, /* In creation */
538 PRS_NORMAL, /* KSEs can be run */
539 PRS_ZOMBIE
540 } p_state; /* (j) S* process status. */
541 pid_t p_pid; /* (b) Process identifier. */
542 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
543 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
544 struct proc *p_pptr; /* (c + e) Pointer to parent process. */
545 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
546 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
547 struct mtx p_mtx; /* (k) Lock for this struct. */
548
549 /* The following fields are all zeroed upon creation in fork. */
550 #define p_startzero p_oppid
551 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */
552 struct vmspace *p_vmspace; /* (b) Address space. */
553 u_int p_swtime; /* (j) Time swapped in or out. */
554 struct itimerval p_realtimer; /* (h?/k?) Alarm timer. */
555 struct bintime p_runtime; /* (j) Real time. */
556 int p_traceflag; /* (o) Kernel trace points. */
557 struct vnode *p_tracep; /* (c + o) Trace to vnode. */
558 sigset_t p_siglist; /* (c) Sigs arrived, not delivered. */
559 struct vnode *p_textvp; /* (b) Vnode of executable. */
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 sigset_t p_oldsigmask; /* (c) Saved mask from pre sigpause. */
565 int p_sig; /* (n) For core dump/debugger XXX. */
566 u_long p_code; /* (n) For core dump/debugger XXX. */
567 u_int p_stops; /* (c) Stop event bitmask. */
568 u_int p_stype; /* (c) Stop event type. */
569 char p_step; /* (c) Process is stopped. */
570 u_char p_pfsflags; /* (c) Procfs flags. */
571 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
572 void *p_aioinfo; /* (c) ASYNC I/O info. */
573 struct thread *p_singlethread;/* (j) If single threading this is it */
574 int p_suspcount; /* (j) # threads in suspended mode */
575 int p_userthreads; /* (j) # threads in userland */
576 /* End area that is zeroed on creation. */
577 #define p_endzero p_sigmask
578
579 /* The following fields are all copied upon creation in fork. */
580 #define p_startcopy p_endzero
581 sigset_t p_sigmask; /* (c) Current signal mask. */
582 stack_t p_sigstk; /* (c) Stack ptr and on-stack flag. */
583 u_int p_magic; /* (b) Magic number. */
584 char p_comm[MAXCOMLEN + 1]; /* (b) Process name. */
585 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
586 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
587 struct pargs *p_args; /* (c) Process arguments. */
588 rlim_t p_cpulimit; /* (j) Current CPU limit in seconds. */
589 /* End area that is copied on creation. */
590 #define p_endcopy p_xstat
591
592 u_short p_xstat; /* (c) Exit status; also stop sig. */
593 int p_numthreads; /* (?) number of threads */
594 int p_numksegrps; /* (?) number of ksegrps */
595 struct mdproc p_md; /* (c) Any machine-dependent fields. */
596 struct callout p_itcallout; /* (h) Interval timer callout. */
597 struct user *p_uarea; /* (k) Kernel VA of u-area (CPU) */
598 u_short p_acflag; /* (c) Accounting flags. */
599 struct rusage *p_ru; /* (a) Exit information. XXX */
600 struct proc *p_peers; /* (r) */
601 struct proc *p_leader; /* (b) */
602 void *p_emuldata; /* (c) Emulator state data. */
603 struct label p_label; /* process (not subject) MAC label */
604 struct p_sched *p_sched; /* Scheduler specific data */
605 };
606
607 #define p_rlimit p_limit->pl_rlimit
608 #define p_sigacts p_procsig->ps_sigacts
609 #define p_sigignore p_procsig->ps_sigignore
610 #define p_sigcatch p_procsig->ps_sigcatch
611 #define p_session p_pgrp->pg_session
612 #define p_pgid p_pgrp->pg_id
613
614 #define NOCPU 0xff /* For when we aren't on a CPU. (SMP) */
615
616 /* Status values (p_stat). */
617
618 /* These flags are kept in p_flag. */
619 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
620 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
621 #define P_KTHREAD 0x00004 /* Kernel thread. (*)*/
622 #define P_NOLOAD 0x00008 /* Ignore during load avg calculations. */
623 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
624 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
625 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
626 #define P_WAITED 0x01000 /* Someone is waiting for us */
627 #define P_WEXIT 0x02000 /* Working on exiting. */
628 #define P_EXEC 0x04000 /* Process called exec. */
629 #define P_KSES 0x08000 /* Process is using KSEs. */
630 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
631
632 /* flags that control how threads may be suspended for some reason */
633 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP */
634 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing */
635 #define P_STOPPED_SINGLE 0x80000 /* Only one thread can continue */
636 /* (not to user) */
637 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, */
638 /* not wait */
639 #define P_TRACED 0x00800 /* Debugged process being traced. */
640 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
641 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
642
643 /* Should be moved to machine-dependent areas. */
644 #define P_UNUSED100000 0x100000
645 #define P_COWINPROGRESS 0x400000 /* Snapshot copy-on-write in progress. */
646
647 #define P_JAILED 0x1000000 /* Process is in jail. */
648 #define P_OLDMASK 0x2000000 /* Need to restore mask after suspend. */
649 #define P_ALTSTACK 0x4000000 /* Have alternate signal stack. */
650 #define P_INEXEC 0x8000000 /* Process is in execve(). */
651
652 /* These flags are kept in p_sflag and are protected with sched_lock. */
653 #define PS_INMEM 0x00001 /* Loaded into memory. */
654 #define PS_XCPU 0x00002 /* Exceeded CPU limit. */
655 #define PS_PROFIL 0x00004 /* Has started profiling. */
656 #define PS_ALRMPEND 0x00020 /* Pending SIGVTALRM needs to be posted. */
657 #define PS_PROFPEND 0x00040 /* Pending SIGPROF needs to be posted. */
658 #define PS_SWAPINREQ 0x00100 /* Swapin request due to wakeup. */
659 #define PS_SWAPPING 0x00200 /* Process is being swapped. */
660 #define PS_NEEDSIGCHK 0x02000 /* Process may need signal delivery. */
661 #define PS_SWAPPINGIN 0x04000 /* Swapin in progress. */
662 #define PS_MACPEND 0x08000 /* Ast()-based MAC event pending. */
663
664 /* used only in legacy conversion code */
665 #define SIDL 1 /* Process being created by fork. */
666 #define SRUN 2 /* Currently runnable. */
667 #define SSLEEP 3 /* Sleeping on an address. */
668 #define SSTOP 4 /* Process debugging or suspension. */
669 #define SZOMB 5 /* Awaiting collection by parent. */
670 #define SWAIT 6 /* Waiting for interrupt. */
671 #define SLOCK 7 /* Blocked on a lock. */
672
673 #define P_MAGIC 0xbeefface
674
675 #ifdef _KERNEL
676
677 #ifdef MALLOC_DECLARE
678 MALLOC_DECLARE(M_PARGS);
679 MALLOC_DECLARE(M_PGRP);
680 MALLOC_DECLARE(M_SESSION);
681 MALLOC_DECLARE(M_SUBPROC);
682 MALLOC_DECLARE(M_ZOMBIE);
683 #endif
684
685 #define FOREACH_PROC_IN_SYSTEM(p) \
686 LIST_FOREACH((p), &allproc, p_list)
687 #define FOREACH_KSEGRP_IN_PROC(p, kg) \
688 TAILQ_FOREACH((kg), &(p)->p_ksegrps, kg_ksegrp)
689 #define FOREACH_THREAD_IN_GROUP(kg, td) \
690 TAILQ_FOREACH((td), &(kg)->kg_threads, td_kglist)
691 #define FOREACH_KSE_IN_GROUP(kg, ke) \
692 TAILQ_FOREACH((ke), &(kg)->kg_kseq, ke_kglist)
693 #define FOREACH_THREAD_IN_PROC(p, td) \
694 TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
695
696 /* XXXKSE the lines below should probably only be used in 1:1 code */
697 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&p->p_threads)
698 #define FIRST_KSEGRP_IN_PROC(p) TAILQ_FIRST(&p->p_ksegrps)
699 #define FIRST_KSE_IN_KSEGRP(kg) TAILQ_FIRST(&kg->kg_kseq)
700 #define FIRST_KSE_IN_PROC(p) FIRST_KSE_IN_KSEGRP(FIRST_KSEGRP_IN_PROC(p))
701
702 static __inline int
703 sigonstack(size_t sp)
704 {
705 register struct thread *td = curthread;
706 struct proc *p = td->td_proc;
707
708 return ((p->p_flag & P_ALTSTACK) ?
709 #if defined(COMPAT_43) || defined(COMPAT_SUNOS)
710 ((p->p_sigstk.ss_size == 0) ? (p->p_sigstk.ss_flags & SS_ONSTACK) :
711 ((sp - (size_t)p->p_sigstk.ss_sp) < p->p_sigstk.ss_size))
712 #else
713 ((sp - (size_t)p->p_sigstk.ss_sp) < p->p_sigstk.ss_size)
714 #endif
715 : 0);
716 }
717
718 /* Handy macro to determine if p1 can mangle p2. */
719 #define PRISON_CHECK(p1, p2) \
720 ((p1)->p_prison == NULL || (p1)->p_prison == (p2)->p_prison)
721
722 /*
723 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
724 * as it is used to represent "no process group".
725 */
726 #define PID_MAX 99999
727 #define NO_PID 100000
728
729 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
730 #define SESSHOLD(s) ((s)->s_count++)
731 #define SESSRELE(s) { \
732 if (--(s)->s_count == 0) \
733 FREE(s, M_SESSION); \
734 }
735
736 #define STOPEVENT(p, e, v) do { \
737 PROC_LOCK(p); \
738 _STOPEVENT((p), (e), (v)); \
739 PROC_UNLOCK(p); \
740 } while (0)
741 #define _STOPEVENT(p, e, v) do { \
742 PROC_LOCK_ASSERT(p, MA_OWNED); \
743 if ((p)->p_stops & (e)) { \
744 stopevent((p), (e), (v)); \
745 } \
746 } while (0)
747
748 /* Lock and unlock a process. */
749 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
750 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
751 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
752 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
753 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
754
755 /* Lock and unlock a process group. */
756 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
757 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
758 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
759 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
760
761 #define PGRP_LOCK_PGSIGNAL(pg) \
762 do { \
763 if ((pg) != NULL) \
764 PGRP_LOCK(pg); \
765 } while (0);
766
767 #define PGRP_UNLOCK_PGSIGNAL(pg) \
768 do { \
769 if ((pg) != NULL) \
770 PGRP_UNLOCK(pg); \
771 } while (0);
772
773 /* Lock and unlock a session. */
774 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
775 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
776 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
777 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
778
779 /* Hold process U-area in memory, normally for ptrace/procfs work. */
780 #define PHOLD(p) do { \
781 PROC_LOCK(p); \
782 _PHOLD(p); \
783 PROC_UNLOCK(p); \
784 } while (0)
785 #define _PHOLD(p) do { \
786 PROC_LOCK_ASSERT((p), MA_OWNED); \
787 if ((p)->p_lock++ == 0) { \
788 mtx_lock_spin(&sched_lock); \
789 faultin((p)); \
790 mtx_unlock_spin(&sched_lock); \
791 } \
792 } while (0)
793
794 #define PRELE(p) do { \
795 PROC_LOCK((p)); \
796 _PRELE((p)); \
797 PROC_UNLOCK((p)); \
798 } while (0)
799 #define _PRELE(p) do { \
800 PROC_LOCK_ASSERT((p), MA_OWNED); \
801 (--(p)->p_lock); \
802 } while (0)
803
804 /* Check whether a thread is safe to be swapped out. */
805 #define thread_safetoswapout(td) (TD_IS_SLEEPING(td) || TD_IS_SUSPENDED(td))
806
807 /* Lock and unlock process arguments. */
808 #define PARGS_LOCK(p) mtx_lock(&pargs_ref_lock)
809 #define PARGS_UNLOCK(p) mtx_unlock(&pargs_ref_lock)
810
811 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
812 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
813 extern u_long pidhash;
814
815 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
816 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
817 extern u_long pgrphash;
818
819 extern struct sx allproc_lock;
820 extern struct sx proctree_lock;
821 extern struct mtx pargs_ref_lock;
822 extern struct mtx ppeers_lock;
823 extern struct proc proc0; /* Process slot for swapper. */
824 extern struct thread thread0; /* Primary thread in proc0 */
825 extern struct ksegrp ksegrp0; /* Primary ksegrp in proc0 */
826 extern struct kse kse0; /* Primary kse in proc0 */
827 extern int hogticks; /* Limit on kernel cpu hogs. */
828 extern int nprocs, maxproc; /* Current and max number of procs. */
829 extern int maxprocperuid; /* Max procs per uid. */
830 extern u_long ps_arg_cache_limit;
831 extern int ps_argsopen;
832 extern int ps_showallprocs;
833 extern int sched_quantum; /* Scheduling quantum in ticks. */
834
835 LIST_HEAD(proclist, proc);
836 TAILQ_HEAD(procqueue, proc);
837 TAILQ_HEAD(threadqueue, thread);
838 extern struct proclist allproc; /* List of all processes. */
839 extern struct proclist zombproc; /* List of zombie processes. */
840 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
841 extern struct proc *updateproc; /* Process slot for syncer (sic). */
842
843 extern struct uma_zone *proc_zone;
844
845 extern int lastpid;
846
847 struct proc *pfind(pid_t); /* Find process by id. */
848 struct pgrp *pgfind(pid_t); /* Find process group by id. */
849 struct proc *zpfind(pid_t); /* Find zombie process by id. */
850
851 void adjustrunqueue(struct thread *, int newpri);
852 void ast(struct trapframe *framep);
853 struct thread *choosethread(void);
854 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
855 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, struct session *sess);
856 int enterthispgrp(struct proc *p, struct pgrp *pgrp);
857 void faultin(struct proc *p);
858 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
859 int fork1(struct thread *, int, int, struct proc **);
860 void fork_exit(void (*)(void *, struct trapframe *), void *,
861 struct trapframe *);
862 void fork_return(struct thread *, struct trapframe *);
863 int inferior(struct proc *p);
864 int leavepgrp(struct proc *p);
865 void mi_switch(void);
866 int p_candebug(struct thread *td, struct proc *p);
867 int p_cansee(struct thread *td, struct proc *p);
868 int p_cansched(struct thread *td, struct proc *p);
869 int p_cansignal(struct thread *td, struct proc *p, int signum);
870 struct pargs *pargs_alloc(int len);
871 void pargs_drop(struct pargs *pa);
872 void pargs_free(struct pargs *pa);
873 void pargs_hold(struct pargs *pa);
874 void procinit(void);
875 void threadinit(void);
876 void proc_linkup(struct proc *p, struct ksegrp *kg,
877 struct kse *ke, struct thread *td);
878 void proc_reparent(struct proc *child, struct proc *newparent);
879 int securelevel_ge(struct ucred *cr, int level);
880 int securelevel_gt(struct ucred *cr, int level);
881 void setrunnable(struct thread *);
882 void setrunqueue(struct thread *);
883 void setsugid(struct proc *p);
884 void sleepinit(void);
885 void stopevent(struct proc *, u_int, u_int);
886 void cpu_idle(void);
887 void cpu_switch(void);
888 void cpu_throw(void) __dead2;
889 void unsleep(struct thread *);
890 void userret(struct thread *, struct trapframe *, u_int);
891
892 void cpu_exit(struct thread *);
893 void cpu_sched_exit(struct thread *);
894 void exit1(struct thread *, int) __dead2;
895 void cpu_fork(struct thread *, struct proc *, struct thread *, int);
896 void cpu_set_fork_handler(struct thread *, void (*)(void *), void *);
897 void cpu_wait(struct proc *);
898
899 /* New in KSE. */
900 struct ksegrp *ksegrp_alloc(void);
901 void ksegrp_free(struct ksegrp *kg);
902 void ksegrp_stash(struct ksegrp *kg);
903 struct kse *kse_alloc(void);
904 void kse_free(struct kse *ke);
905 void kse_stash(struct kse *ke);
906 void cpu_set_upcall(struct thread *td, void *pcb);
907 void cpu_set_upcall_kse(struct thread *td, struct kse *ke);
908 void cpu_thread_clean(struct thread *);
909 void cpu_thread_exit(struct thread *);
910 void cpu_thread_setup(struct thread *td);
911 void kse_reassign(struct kse *ke);
912 void kse_link(struct kse *ke, struct ksegrp *kg);
913 void kse_unlink(struct kse *ke);
914 void ksegrp_link(struct ksegrp *kg, struct proc *p);
915 void ksegrp_unlink(struct ksegrp *kg);
916 void make_kse_runnable(struct kse *ke);
917 struct thread *signal_upcall(struct proc *p, int sig);
918 struct thread *thread_alloc(void);
919 void thread_exit(void) __dead2;
920 int thread_export_context(struct thread *td);
921 void thread_free(struct thread *td);
922 void thread_getcontext(struct thread *td, ucontext_t *uc);
923 void thread_link(struct thread *td, struct ksegrp *kg);
924 void thread_reap(void);
925 struct thread *thread_schedule_upcall(struct thread *td, struct kse *ke);
926 int thread_setcontext(struct thread *td, ucontext_t *uc);
927 int thread_single(int how);
928 #define SINGLE_NO_EXIT 0 /* values for 'how' */
929 #define SINGLE_EXIT 1
930 void thread_single_end(void);
931 void thread_stash(struct thread *td);
932 int thread_suspend_check(int how);
933 void thread_suspend_one(struct thread *td);
934 void thread_unsuspend(struct proc *p);
935 void thread_unsuspend_one(struct thread *td);
936 int thread_userret(struct thread *td, struct trapframe *frame);
937 void thread_user_enter(struct proc *p, struct thread *td);
938 void thread_wait(struct proc *p);
939 int thread_add_ticks_intr(int user, uint ticks);
940
941 void thread_sanity_check(struct thread *td, char *);
942 #endif /* _KERNEL */
943
944 #endif /* !_SYS_PROC_H_ */
Cache object: 2a931cf4c903dde0cb08146a8a21df3e
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