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 * 4. 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 * @(#)proc.h 8.15 (Berkeley) 5/19/95
35 * $FreeBSD: releng/5.3/sys/sys/proc.h 136789 2004-10-22 19:13:07Z scottl $
36 */
37
38 #ifndef _SYS_PROC_H_
39 #define _SYS_PROC_H_
40
41 #include <sys/callout.h> /* For struct callout. */
42 #include <sys/event.h> /* For struct klist. */
43 #ifndef _KERNEL
44 #include <sys/filedesc.h>
45 #endif
46 #include <sys/queue.h>
47 #include <sys/_lock.h>
48 #include <sys/_mutex.h>
49 #include <sys/priority.h>
50 #include <sys/rtprio.h> /* XXX. */
51 #include <sys/runq.h>
52 #include <sys/sigio.h>
53 #include <sys/signal.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 /*
101 * pargs, used to hold a copy of the command line, if it had a sane length.
102 */
103 struct pargs {
104 u_int ar_ref; /* Reference count. */
105 u_int ar_length; /* Length. */
106 u_char ar_args[1]; /* Arguments. */
107 };
108
109 /*-
110 * Description of a process.
111 *
112 * This structure contains the information needed to manage a thread of
113 * control, known in UN*X as a process; it has references to substructures
114 * containing descriptions of things that the process uses, but may share
115 * with related processes. The process structure and the substructures
116 * are always addressable except for those marked "(CPU)" below,
117 * which might be addressable only on a processor on which the process
118 * is running.
119 *
120 * Below is a key of locks used to protect each member of struct proc. The
121 * lock is indicated by a reference to a specific character in parens in the
122 * associated comment.
123 * * - not yet protected
124 * a - only touched by curproc or parent during fork/wait
125 * b - created at fork, never changes
126 * (exception aiods switch vmspaces, but they are also
127 * marked 'P_SYSTEM' so hopefully it will be left alone)
128 * c - locked by proc mtx
129 * d - locked by allproc_lock lock
130 * e - locked by proctree_lock lock
131 * f - session mtx
132 * g - process group mtx
133 * h - callout_lock mtx
134 * i - by curproc or the master session mtx
135 * j - locked by sched_lock mtx
136 * k - only accessed by curthread
137 * l - the attaching proc or attaching proc parent
138 * m - Giant
139 * n - not locked, lazy
140 * o - ktrace lock
141 * p - select lock (sellock)
142 * q - td_contested lock
143 * r - p_peers lock
144 * x - created at fork, only changes during single threading in exec
145 * z - zombie threads/ksegroup lock
146 *
147 * If the locking key specifies two identifiers (for example, p_pptr) then
148 * either lock is sufficient for read access, but both locks must be held
149 * for write access.
150 */
151 struct ithd;
152 struct kg_sched;
153 struct nlminfo;
154 struct p_sched;
155 struct sleepqueue;
156 struct td_sched;
157 struct trapframe;
158 struct turnstile;
159
160 /*
161 * Here we define the three structures used for process information.
162 *
163 * The first is the thread. It might be thought of as a "Kernel
164 * Schedulable Entity Context".
165 * This structure contains all the information as to where a thread of
166 * execution is now, or was when it was suspended, why it was suspended,
167 * and anything else that will be needed to restart it when it is
168 * rescheduled. Always associated with a KSE when running, but can be
169 * reassigned to an equivalent KSE when being restarted for
170 * load balancing. Each of these is associated with a kernel stack
171 * and a pcb.
172 *
173 * It is important to remember that a particular thread structure may only
174 * exist as long as the system call or kernel entrance (e.g. by pagefault)
175 * which it is currently executing. It should therefore NEVER be referenced
176 * by pointers in long lived structures that live longer than a single
177 * request. If several threads complete their work at the same time,
178 * they will all rewind their stacks to the user boundary, report their
179 * completion state, and all but one will be freed. That last one will
180 * be kept to provide a kernel stack and pcb for the NEXT syscall or kernel
181 * entrance. (basically to save freeing and then re-allocating it) The existing
182 * thread keeps a cached spare thread available to allow it to quickly
183 * get one when it needs a new one. There is also a system
184 * cache of free threads. Threads have priority and partake in priority
185 * inheritance schemes.
186 */
187 struct thread;
188
189 /*
190 * The KSEGRP is allocated resources across a number of CPUs.
191 * (Including a number of CPUxQUANTA. It parcels these QUANTA up among
192 * its threads, each of which should be running in a different CPU.
193 * BASE priority and total available quanta are properties of a KSEGRP.
194 * Multiple KSEGRPs in a single process compete against each other
195 * for total quanta in the same way that a forked child competes against
196 * it's parent process.
197 */
198 struct ksegrp;
199
200 /*
201 * A process is the owner of all system resources allocated to a task
202 * except CPU quanta.
203 * All KSEGs under one process see, and have the same access to, these
204 * resources (e.g. files, memory, sockets, credential, kqueues).
205 * A process may compete for CPU cycles on the same basis as a
206 * forked process cluster by spawning several KSEGRPs.
207 */
208 struct proc;
209
210 /***************
211 * In pictures:
212 With a single run queue used by all processors:
213
214 RUNQ: --->KSE---KSE--... SLEEPQ:[]---THREAD---THREAD---THREAD
215 \ \ []---THREAD
216 KSEG---THREAD--THREAD--THREAD []
217 []---THREAD---THREAD
218
219 (processors run THREADs from the KSEG until they are exhausted or
220 the KSEG exhausts its quantum)
221
222 With PER-CPU run queues:
223 KSEs on the separate run queues directly
224 They would be given priorities calculated from the KSEG.
225
226 *
227 *****************/
228
229 /*
230 * Kernel runnable context (thread).
231 * This is what is put to sleep and reactivated.
232 * The first KSE available in the correct group will run this thread.
233 * If several are available, use the one on the same CPU as last time.
234 * When waiting to be run, threads are hung off the KSEGRP in priority order.
235 * with N runnable and queued KSEs in the KSEGRP, the first N threads
236 * are linked to them. Other threads are not yet assigned.
237 */
238 struct thread {
239 struct proc *td_proc; /* (*) Associated process. */
240 struct ksegrp *td_ksegrp; /* (*) Associated KSEG. */
241 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */
242 TAILQ_ENTRY(thread) td_kglist; /* (*) All threads in this ksegrp. */
243
244 /* The two queues below should someday be merged. */
245 TAILQ_ENTRY(thread) td_slpq; /* (j) Sleep queue. */
246 TAILQ_ENTRY(thread) td_lockq; /* (j) Lock queue. */
247 TAILQ_ENTRY(thread) td_runq; /* (j/z) Run queue(s). XXXKSE */
248
249 TAILQ_HEAD(, selinfo) td_selq; /* (p) List of selinfos. */
250 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */
251 struct turnstile *td_turnstile; /* (k) Associated turnstile. */
252 lwpid_t td_tid; /* (b) Thread ID. */
253
254 /* Cleared during fork1() or thread_schedule_upcall(). */
255 #define td_startzero td_flags
256 int td_flags; /* (j) TDF_* flags. */
257 int td_inhibitors; /* (j) Why can not run. */
258 int td_pflags; /* (k) Private thread (TDP_*) flags. */
259 int td_dupfd; /* (k) Ret value from fdopen. XXX */
260 void *td_wchan; /* (j) Sleep address. */
261 const char *td_wmesg; /* (j) Reason for sleep. */
262 u_char td_lastcpu; /* (j) Last cpu we were on. */
263 u_char td_oncpu; /* (j) Which cpu we are on. */
264 short td_locks; /* (k) DEBUG: lockmgr count of locks. */
265 struct turnstile *td_blocked; /* (j) Lock process is blocked on. */
266 struct ithd *td_ithd; /* (b) For interrupt threads only. */
267 const char *td_lockname; /* (j) Name of lock blocked on. */
268 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */
269 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
270 int td_intr_nesting_level; /* (k) Interrupt recursion. */
271 int td_pinned; /* (k) Temporary cpu pin count. */
272 struct kse_thr_mailbox *td_mailbox; /* (*) Userland mailbox address. */
273 struct ucred *td_ucred; /* (k) Reference to credentials. */
274 struct thread *td_standin; /* (*) Use this for an upcall. */
275 u_int td_prticks; /* (*) Profclock hits in sys for user */
276 struct kse_upcall *td_upcall; /* (*) Upcall structure. */
277 u_int64_t td_sticks; /* (j) Statclock hits in system mode. */
278 u_int td_uuticks; /* (*) Statclock in user, for UTS. */
279 u_int td_usticks; /* (*) Statclock in kernel, for UTS. */
280 int td_intrval; /* (*) Return value of TDF_INTERRUPT. */
281 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */
282 sigset_t td_sigmask; /* (c) Current signal mask. */
283 sigset_t td_siglist; /* (c) Sigs arrived, not delivered. */
284 sigset_t *td_waitset; /* (c) Wait set for sigwait. */
285 TAILQ_ENTRY(thread) td_umtx; /* (c?) Link for when we're blocked. */
286 volatile u_int td_generation; /* (k) Enable detection of preemption */
287 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */
288 int td_kflags; /* (c) Flags for KSE threading. */
289 int td_xsig; /* (c) Signal for ptrace */
290 u_long td_profil_addr; /* (k) Temporary addr until AST. */
291 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */
292
293 #define td_endzero td_base_pri
294
295 /* Copied during fork1() or thread_sched_upcall(). */
296 #define td_startcopy td_endzero
297 u_char td_base_pri; /* (j) Thread base kernel priority. */
298 u_char td_priority; /* (j) Thread active priority. */
299 #define td_endcopy td_pcb
300
301 /*
302 * fields that must be manually set in fork1() or thread_sched_upcall()
303 * or already have been set in the allocator, contstructor, etc..
304 */
305 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
306 enum {
307 TDS_INACTIVE = 0x0,
308 TDS_INHIBITED,
309 TDS_CAN_RUN,
310 TDS_RUNQ,
311 TDS_RUNNING
312 } td_state;
313 register_t td_retval[2]; /* (k) Syscall aux returns. */
314 struct callout td_slpcallout; /* (h) Callout for sleep. */
315 struct trapframe *td_frame; /* (k) */
316 struct vm_object *td_kstack_obj;/* (a) Kstack object. */
317 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
318 int td_kstack_pages; /* (a) Size of the kstack. */
319 struct vm_object *td_altkstack_obj;/* (a) Alternate kstack object. */
320 vm_offset_t td_altkstack; /* (a) Kernel VA of alternate kstack. */
321 int td_altkstack_pages; /* (a) Size of alternate kstack. */
322 u_int td_critnest; /* (k) Critical section nest level. */
323 struct mdthread td_md; /* (k) Any machine-dependent fields. */
324 struct td_sched *td_sched; /* (*) Scheduler-specific data. */
325 };
326
327 /*
328 * Flags kept in td_flags:
329 * To change these you MUST have the scheduler lock.
330 */
331 #define TDF_UNUSED0 0x00000001 /* --available -- */
332 #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */
333 #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */
334 #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */
335 #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */
336 #define TDF_SELECT 0x00000040 /* Selecting; wakeup/waiting danger. */
337 #define TDF_UNUSED7 0x00000080 /* --available -- */
338 #define TDF_TSNOBLOCK 0x00000100 /* Don't block on a turnstile due to race. */
339 #define TDF_UNUSED9 0x00000200 /* --available -- */
340 #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */
341 #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */
342 #define TDF_TIMOFAIL 0x00001000 /* Timeout from sleep after we were awake. */
343 #define TDF_INTERRUPT 0x00002000 /* Thread is marked as interrupted. */
344 #define TDF_UNUSED14 0x00004000 /* --available -- */
345 #define TDF_UNUSED15 0x00008000 /* --available -- */
346 #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */
347 #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */
348 #define TDF_XSIG 0x00040000 /* Thread is exchanging signal under trace */
349 #define TDF_UMTXWAKEUP 0x00080000 /* Libthr thread must not sleep on a umtx. */
350 #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */
351 #define TDF_DBSUSPEND 0x00200000 /* Thread is suspended by debugger */
352 #define TDF_UNUSED22 0x00400000 /* --available -- */
353 #define TDF_UNUSED23 0x00800000 /* --available -- */
354 #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */
355 #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */
356 #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */
357 #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */
358
359 /*
360 * "Private" flags kept in td_pflags:
361 * These are only accessed by curthread and thus need no locking.
362 */
363 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */
364 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */
365 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */
366 #define TDP_UPCALLING 0x00000008 /* This thread is doing an upcall. */
367 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */
368 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */
369 #define TDP_DEADLKTREAT 0x00000040 /* Lock aquisition - deadlock treatment. */
370 #define TDP_SA 0x00000080 /* A scheduler activation based thread. */
371 #define TDP_OWEPREEMPT 0x00000100 /* Thread has a pending preemption. */
372 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */
373 #define TDP_WAKEPROC0 0x00000400 /* Wants caller to wakeup(&proc0) */
374 #define TDP_CAN_UNBIND 0x00000800 /* Only temporarily bound. */
375 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */
376 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */
377 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */
378 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */
379
380 /*
381 * Reasons that the current thread can not be run yet.
382 * More than one may apply.
383 */
384 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */
385 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
386 #define TDI_SWAPPED 0x0004 /* Stack not in mem.. bad juju if run. */
387 #define TDI_LOCK 0x0008 /* Stopped on a lock. */
388 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
389
390 /*
391 * flags (in kflags) related to M:N threading.
392 */
393 #define TDK_KSEREL 0x0001 /* Blocked in msleep on kg->kg_completed. */
394 #define TDK_KSERELSIG 0x0002 /* Blocked in msleep on p->p_siglist. */
395 #define TDK_WAKEUP 0x0004 /* Thread has been woken by kse_wakeup. */
396
397 #define TD_CAN_UNBIND(td) \
398 (((td)->td_pflags & TDP_CAN_UNBIND) && \
399 ((td)->td_upcall != NULL))
400
401 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
402 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
403 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
404 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
405 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
406 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
407 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
408 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
409 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
410 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
411
412 #define TD_SET_INHIB(td, inhib) do { \
413 (td)->td_state = TDS_INHIBITED; \
414 (td)->td_inhibitors |= (inhib); \
415 } while (0)
416
417 #define TD_CLR_INHIB(td, inhib) do { \
418 if (((td)->td_inhibitors & (inhib)) && \
419 (((td)->td_inhibitors &= ~(inhib)) == 0)) \
420 (td)->td_state = TDS_CAN_RUN; \
421 } while (0)
422
423 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
424 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
425 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
426 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
427 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
428 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
429
430 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
431 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
432 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
433 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
434 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
435
436 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING
437 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ
438 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN
439
440 /*
441 * The upcall management structure.
442 * The upcall is used when returning to userland. If a thread does not have
443 * an upcall on return to userland the thread exports its context and exits.
444 */
445 struct kse_upcall {
446 TAILQ_ENTRY(kse_upcall) ku_link; /* List of upcalls in KSEG. */
447 struct ksegrp *ku_ksegrp; /* Associated KSEG. */
448 struct thread *ku_owner; /* owning thread */
449 int ku_flags; /* KUF_* flags. */
450 struct kse_mailbox *ku_mailbox; /* userland mailbox address. */
451 stack_t ku_stack; /* userland upcall stack. */
452 void *ku_func; /* userland upcall function. */
453 unsigned int ku_mflags; /* cached upcall mailbox flags */
454 };
455
456 #define KUF_DOUPCALL 0x00001 /* Do upcall now, don't wait. */
457 #define KUF_EXITING 0x00002 /* Upcall structure is exiting. */
458
459 /*
460 * Kernel-scheduled entity group (KSEG). The scheduler considers each KSEG to
461 * be an indivisible unit from a time-sharing perspective, though each KSEG may
462 * contain multiple KSEs.
463 */
464 struct ksegrp {
465 struct proc *kg_proc; /* (*) Process that contains this KSEG. */
466 TAILQ_ENTRY(ksegrp) kg_ksegrp; /* (*) Queue of KSEGs in kg_proc. */
467 TAILQ_HEAD(, thread) kg_threads;/* (td_kglist) All threads. */
468 TAILQ_HEAD(, thread) kg_runq; /* (td_runq) waiting RUNNABLE threads */
469 TAILQ_HEAD(, thread) kg_slpq; /* (td_runq) NONRUNNABLE threads. */
470 TAILQ_HEAD(, kse_upcall) kg_upcalls; /* All upcalls in the group. */
471 #define kg_startzero kg_estcpu
472 u_int kg_estcpu; /* (j) Sum of the same field in KSEs. */
473 u_int kg_slptime; /* (j) How long completely blocked. */
474 int kg_runnable; /* (j) Num runnable threads on queue. */
475 int kg_numupcalls; /* (j) Num upcalls. */
476 int kg_upsleeps; /* (c) Num threads in kse_release(). */
477 struct kse_thr_mailbox *kg_completed; /* (c) Completed thread mboxes. */
478 int kg_nextupcall; /* (*) Next upcall time. */
479 int kg_upquantum; /* (*) Quantum to schedule an upcall. */
480 #define kg_endzero kg_pri_class
481
482 #define kg_startcopy kg_endzero
483 u_char kg_pri_class; /* (j) Scheduling class. */
484 u_char kg_user_pri; /* (j) User pri from estcpu and nice. */
485 #define kg_endcopy kg_numthreads
486 int kg_numthreads; /* (j) Num threads in total. */
487 struct kg_sched *kg_sched; /* (*) Scheduler-specific data. */
488 };
489
490 /*
491 * The old fashionned process. May have multiple threads, KSEGRPs
492 * and KSEs. Starts off with a single embedded KSEGRP and THREAD.
493 */
494 struct proc {
495 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
496 TAILQ_HEAD(, ksegrp) p_ksegrps; /* (c)(kg_ksegrp) All KSEGs. */
497 TAILQ_HEAD(, thread) p_threads; /* (j)(td_plist) Threads. (shortcut) */
498 TAILQ_HEAD(, thread) p_suspended; /* (td_runq) Suspended threads. */
499 struct ucred *p_ucred; /* (c) Process owner's identity. */
500 struct filedesc *p_fd; /* (b) Ptr to open files structure. */
501 struct filedesc_to_leader *p_fdtol; /* (b) Ptr to tracking node */
502 /* Accumulated stats for all threads? */
503 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
504 struct plimit *p_limit; /* (c) Process limits. */
505 struct vm_object *p_upages_obj; /* (a) Upages object. */
506 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */
507 /*
508 * The following don't make too much sense..
509 * See the td_ or ke_ versions of the same flags
510 */
511 int p_flag; /* (c) P_* flags. */
512 int p_sflag; /* (j) PS_* flags. */
513 enum {
514 PRS_NEW = 0, /* In creation */
515 PRS_NORMAL, /* threads can be run. */
516 PRS_ZOMBIE
517 } p_state; /* (j/c) S* process status. */
518 pid_t p_pid; /* (b) Process identifier. */
519 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
520 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
521 struct proc *p_pptr; /* (c + e) Pointer to parent process. */
522 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
523 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
524 struct mtx p_mtx; /* (n) Lock for this struct. */
525
526 /* The following fields are all zeroed upon creation in fork. */
527 #define p_startzero p_oppid
528 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */
529 struct vmspace *p_vmspace; /* (b) Address space. */
530 u_int p_swtime; /* (j) Time swapped in or out. */
531 struct itimerval p_realtimer; /* (c) Alarm timer. */
532 struct bintime p_runtime; /* (j) Real time. */
533 u_int64_t p_uu; /* (j) Previous user time in usec. */
534 u_int64_t p_su; /* (j) Previous system time in usec. */
535 u_int64_t p_iu; /* (j) Previous intr time in usec. */
536 u_int64_t p_uticks; /* (j) Statclock hits in user mode. */
537 u_int64_t p_sticks; /* (j) Statclock hits in system mode. */
538 u_int64_t p_iticks; /* (j) Statclock hits in intr. */
539 int p_profthreads; /* (c) Num threads in addupc_task. */
540 int p_maxthrwaits; /* (c) Max threads num waiters */
541 int p_traceflag; /* (o) Kernel trace points. */
542 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */
543 struct ucred *p_tracecred; /* (o) Credentials to trace with. */
544 struct vnode *p_textvp; /* (b) Vnode of executable. */
545 sigset_t p_siglist; /* (c) Sigs not delivered to a td. */
546 char p_lock; /* (c) Proclock (prevent swap) count. */
547 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
548 int p_sigparent; /* (c) Signal to parent on exit. */
549 int p_sig; /* (n) For core dump/debugger XXX. */
550 u_long p_code; /* (n) For core dump/debugger XXX. */
551 u_int p_stops; /* (c) Stop event bitmask. */
552 u_int p_stype; /* (c) Stop event type. */
553 char p_step; /* (c) Process is stopped. */
554 u_char p_pfsflags; /* (c) Procfs flags. */
555 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
556 void *p_aioinfo; /* (?) ASYNC I/O info. */
557 struct thread *p_singlethread;/* (c + j) If single threading this is it */
558 int p_suspcount; /* (c) # threads in suspended mode */
559 struct thread *p_xthread; /* (c) Trap thread */
560 int p_boundary_count;/* (c) Num threads at user boundary */
561 /* End area that is zeroed on creation. */
562 #define p_endzero p_magic
563
564 /* The following fields are all copied upon creation in fork. */
565 #define p_startcopy p_endzero
566 u_int p_magic; /* (b) Magic number. */
567 char p_comm[MAXCOMLEN + 1]; /* (b) Process name. */
568 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
569 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
570 struct pargs *p_args; /* (c) Process arguments. */
571 rlim_t p_cpulimit; /* (j) Current CPU limit in seconds. */
572 signed char p_nice; /* (c + j) Process "nice" value. */
573 /* End area that is copied on creation. */
574 #define p_endcopy p_xstat
575
576 u_short p_xstat; /* (c) Exit status; also stop sig. */
577 struct knlist p_klist; /* (c) Knotes attached to this proc. */
578 int p_numthreads; /* (j) Number of threads. */
579 int p_numksegrps; /* (c) number of ksegrps */
580 struct mdproc p_md; /* Any machine-dependent fields. */
581 struct callout p_itcallout; /* (h + c) Interval timer callout. */
582 struct user *p_uarea; /* (k) Kernel VA of u-area (CPU). */
583 u_short p_acflag; /* (c) Accounting flags. */
584 struct rusage *p_ru; /* (a) Exit information. XXX */
585 struct proc *p_peers; /* (r) */
586 struct proc *p_leader; /* (b) */
587 void *p_emuldata; /* (c) Emulator state data. */
588 struct label *p_label; /* (*) Proc (not subject) MAC label. */
589 struct p_sched *p_sched; /* (*) Scheduler-specific data. */
590 };
591
592 #define p_session p_pgrp->pg_session
593 #define p_pgid p_pgrp->pg_id
594
595 #define NOCPU 0xff /* For when we aren't on a CPU. (SMP) */
596
597 /* Status values (p_stat). */
598
599 /* These flags are kept in p_flag. */
600 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
601 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
602 #define P_KTHREAD 0x00004 /* Kernel thread. (*)*/
603 #define P_NOLOAD 0x00008 /* Ignore during load avg calculations. */
604 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
605 #define P_PROFIL 0x00020 /* Has started profiling. */
606 #define P_STOPPROF 0x00040 /* Has thread in requesting to stop prof */
607 #define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */
608 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
609 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
610 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */
611 #define P_TRACED 0x00800 /* Debugged process being traced. */
612 #define P_WAITED 0x01000 /* Someone is waiting for us. */
613 #define P_WEXIT 0x02000 /* Working on exiting. */
614 #define P_EXEC 0x04000 /* Process called exec. */
615 #define P_SA 0x08000 /* Using scheduler activations. */
616 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
617 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */
618 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */
619 #define P_STOPPED_SINGLE 0x80000 /* Only one thread can continue */
620 /* (not to user) */
621 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
622 #define P_SIGEVENT 0x200000 /* Process pending signals changed. */
623 #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */
624 #define P_JAILED 0x1000000 /* Process is in jail. */
625 #define P_INEXEC 0x4000000 /* Process is in execve(). */
626
627 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
628 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
629
630 /* These flags are kept in p_sflag and are protected with sched_lock. */
631 #define PS_INMEM 0x00001 /* Loaded into memory. */
632 #define PS_XCPU 0x00002 /* Exceeded CPU limit. */
633 #define PS_ALRMPEND 0x00020 /* Pending SIGVTALRM needs to be posted. */
634 #define PS_PROFPEND 0x00040 /* Pending SIGPROF needs to be posted. */
635 #define PS_SWAPINREQ 0x00100 /* Swapin request due to wakeup. */
636 #define PS_SWAPPINGOUT 0x00200 /* Process is being swapped out. */
637 #define PS_SWAPPINGIN 0x04000 /* Process is being swapped in. */
638 #define PS_MACPEND 0x08000 /* Ast()-based MAC event pending. */
639
640 /* used only in legacy conversion code */
641 #define SIDL 1 /* Process being created by fork. */
642 #define SRUN 2 /* Currently runnable. */
643 #define SSLEEP 3 /* Sleeping on an address. */
644 #define SSTOP 4 /* Process debugging or suspension. */
645 #define SZOMB 5 /* Awaiting collection by parent. */
646 #define SWAIT 6 /* Waiting for interrupt. */
647 #define SLOCK 7 /* Blocked on a lock. */
648
649 #define P_MAGIC 0xbeefface
650
651 #ifdef _KERNEL
652
653 /* Flags for mi_switch(). */
654 #define SW_VOL 0x0001 /* Voluntary switch. */
655 #define SW_INVOL 0x0002 /* Involuntary switch. */
656 #define SW_PREEMPT 0x0004 /* The invol switch is a preemption */
657
658 /* Flags for setrunqueue(). Why are we setting this thread on the run queue? */
659 #define SRQ_BORING 0x0000 /* No special circumstances. */
660 #define SRQ_YIELDING 0x0001 /* We are yielding (from mi_switch). */
661 #define SRQ_OURSELF 0x0002 /* It is ourself (from mi_switch). */
662 #define SRQ_INTR 0x0004 /* It is probably urgent. */
663 #define SRQ_PREEMPTED 0x0008 /* has been preempted.. be kind */
664
665 /* How values for thread_single(). */
666 #define SINGLE_NO_EXIT 0
667 #define SINGLE_EXIT 1
668 #define SINGLE_BOUNDARY 2
669
670 /* XXXKSE: Missing values for thread_suspsend_check(). */
671
672 #ifdef MALLOC_DECLARE
673 MALLOC_DECLARE(M_PARGS);
674 MALLOC_DECLARE(M_PGRP);
675 MALLOC_DECLARE(M_SESSION);
676 MALLOC_DECLARE(M_SUBPROC);
677 MALLOC_DECLARE(M_ZOMBIE);
678 #endif
679
680 #define FOREACH_PROC_IN_SYSTEM(p) \
681 LIST_FOREACH((p), &allproc, p_list)
682 #define FOREACH_KSEGRP_IN_PROC(p, kg) \
683 TAILQ_FOREACH((kg), &(p)->p_ksegrps, kg_ksegrp)
684 #define FOREACH_THREAD_IN_GROUP(kg, td) \
685 TAILQ_FOREACH((td), &(kg)->kg_threads, td_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
695 /*
696 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
697 * as it is used to represent "no process group".
698 */
699 #define PID_MAX 99999
700 #define NO_PID 100000
701
702 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
703 #define SESSHOLD(s) ((s)->s_count++)
704 #define SESSRELE(s) { \
705 if (--(s)->s_count == 0) \
706 FREE(s, M_SESSION); \
707 }
708
709 #define STOPEVENT(p, e, v) do { \
710 if ((p)->p_stops & (e)) { \
711 PROC_LOCK(p); \
712 stopevent((p), (e), (v)); \
713 PROC_UNLOCK(p); \
714 } \
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 } while (0)
721
722 /* Lock and unlock a process. */
723 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
724 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
725 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
726 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
727 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
728
729 /* Lock and unlock a process group. */
730 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
731 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
732 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
733 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
734
735 #define PGRP_LOCK_PGSIGNAL(pg) do { \
736 if ((pg) != NULL) \
737 PGRP_LOCK(pg); \
738 } while (0)
739 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \
740 if ((pg) != NULL) \
741 PGRP_UNLOCK(pg); \
742 } while (0)
743
744 /* Lock and unlock a session. */
745 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
746 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
747 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
748 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
749
750 /* Hold process U-area in memory, normally for ptrace/procfs work. */
751 #define PHOLD(p) do { \
752 PROC_LOCK(p); \
753 _PHOLD(p); \
754 PROC_UNLOCK(p); \
755 } while (0)
756 #define _PHOLD(p) do { \
757 PROC_LOCK_ASSERT((p), MA_OWNED); \
758 (p)->p_lock++; \
759 if (((p)->p_sflag & PS_INMEM) == 0) \
760 faultin((p)); \
761 } while (0)
762
763 #define PRELE(p) do { \
764 PROC_LOCK((p)); \
765 _PRELE((p)); \
766 PROC_UNLOCK((p)); \
767 } while (0)
768 #define _PRELE(p) do { \
769 PROC_LOCK_ASSERT((p), MA_OWNED); \
770 (--(p)->p_lock); \
771 } while (0)
772
773 /* Check whether a thread is safe to be swapped out. */
774 #define thread_safetoswapout(td) (TD_IS_SLEEPING(td) || TD_IS_SUSPENDED(td))
775
776 /* Lock and unlock process arguments. */
777 #define PARGS_LOCK(p) mtx_lock(&pargs_ref_lock)
778 #define PARGS_UNLOCK(p) mtx_unlock(&pargs_ref_lock)
779
780 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
781 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
782 extern u_long pidhash;
783
784 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
785 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
786 extern u_long pgrphash;
787
788 extern struct sx allproc_lock;
789 extern struct sx proctree_lock;
790 extern struct mtx pargs_ref_lock;
791 extern struct mtx ppeers_lock;
792 extern struct proc proc0; /* Process slot for swapper. */
793 extern struct thread thread0; /* Primary thread in proc0. */
794 extern struct ksegrp ksegrp0; /* Primary ksegrp in proc0. */
795 extern struct vmspace vmspace0; /* VM space for proc0. */
796 extern int hogticks; /* Limit on kernel cpu hogs. */
797 extern int nprocs, maxproc; /* Current and max number of procs. */
798 extern int maxprocperuid; /* Max procs per uid. */
799 extern u_long ps_arg_cache_limit;
800 extern int sched_quantum; /* Scheduling quantum in ticks. */
801
802 LIST_HEAD(proclist, proc);
803 TAILQ_HEAD(procqueue, proc);
804 TAILQ_HEAD(threadqueue, thread);
805 extern struct proclist allproc; /* List of all processes. */
806 extern struct proclist zombproc; /* List of zombie processes. */
807 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
808 extern struct proc *updateproc; /* Process slot for syncer (sic). */
809
810 extern struct uma_zone *proc_zone;
811
812 extern int lastpid;
813
814 struct proc *pfind(pid_t); /* Find process by id. */
815 struct pgrp *pgfind(pid_t); /* Find process group by id. */
816 struct proc *zpfind(pid_t); /* Find zombie process by id. */
817
818 void adjustrunqueue(struct thread *, int newpri);
819 void ast(struct trapframe *framep);
820 struct thread *choosethread(void);
821 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
822 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, struct session *sess);
823 int enterthispgrp(struct proc *p, struct pgrp *pgrp);
824 void faultin(struct proc *p);
825 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
826 int fork1(struct thread *, int, int, struct proc **);
827 void fork_exit(void (*)(void *, struct trapframe *), void *,
828 struct trapframe *);
829 void fork_return(struct thread *, struct trapframe *);
830 int inferior(struct proc *p);
831 int leavepgrp(struct proc *p);
832 int maybe_preempt(struct thread *td);
833 void mi_switch(int flags, struct thread *newtd);
834 int p_candebug(struct thread *td, struct proc *p);
835 int p_cansee(struct thread *td, struct proc *p);
836 int p_cansched(struct thread *td, struct proc *p);
837 int p_cansignal(struct thread *td, struct proc *p, int signum);
838 struct pargs *pargs_alloc(int len);
839 void pargs_drop(struct pargs *pa);
840 void pargs_free(struct pargs *pa);
841 void pargs_hold(struct pargs *pa);
842 void procinit(void);
843 void threadinit(void);
844 void proc_linkup(struct proc *p, struct ksegrp *kg, struct thread *td);
845 void proc_reparent(struct proc *child, struct proc *newparent);
846 int securelevel_ge(struct ucred *cr, int level);
847 int securelevel_gt(struct ucred *cr, int level);
848 void setrunnable(struct thread *);
849 void setrunqueue(struct thread *, int flags);
850 void setsugid(struct proc *p);
851 int sigonstack(size_t sp);
852 void sleepinit(void);
853 void stopevent(struct proc *, u_int, u_int);
854 void cpu_idle(void);
855 extern void (*cpu_idle_hook)(void); /* Hook to machdep CPU idler. */
856 void cpu_switch(struct thread *old, struct thread *new);
857 void cpu_throw(struct thread *old, struct thread *new) __dead2;
858 void unsleep(struct thread *);
859 void userret(struct thread *, struct trapframe *, u_int);
860
861 void cpu_exit(struct thread *);
862 void exit1(struct thread *, int) __dead2;
863 void cpu_fork(struct thread *, struct proc *, struct thread *, int);
864 void cpu_set_fork_handler(struct thread *, void (*)(void *), void *);
865
866 /* New in KSE. */
867 struct ksegrp *ksegrp_alloc(void);
868 void ksegrp_free(struct ksegrp *kg);
869 void ksegrp_stash(struct ksegrp *kg);
870 void kse_GC(void);
871 void kseinit(void);
872 void cpu_set_upcall(struct thread *td, struct thread *td0);
873 void cpu_set_upcall_kse(struct thread *td, struct kse_upcall *ku);
874 void cpu_thread_clean(struct thread *);
875 void cpu_thread_exit(struct thread *);
876 void cpu_thread_setup(struct thread *td);
877 void cpu_thread_siginfo(int sig, u_long code, siginfo_t *si);
878 void cpu_thread_swapin(struct thread *);
879 void cpu_thread_swapout(struct thread *);
880 void ksegrp_link(struct ksegrp *kg, struct proc *p);
881 void ksegrp_unlink(struct ksegrp *kg);
882 void thread_signal_add(struct thread *td, int sig);
883 struct thread *thread_alloc(void);
884 void thread_exit(void) __dead2;
885 int thread_export_context(struct thread *td, int willexit);
886 void thread_free(struct thread *td);
887 void thread_link(struct thread *td, struct ksegrp *kg);
888 void thread_reap(void);
889 struct thread *thread_schedule_upcall(struct thread *td, struct kse_upcall *ku);
890 int thread_single(int how);
891 void thread_single_end(void);
892 int thread_sleep_check(struct thread *td);
893 void thread_stash(struct thread *td);
894 int thread_suspend_check(int how);
895 void thread_suspend_one(struct thread *td);
896 void thread_unlink(struct thread *td);
897 void thread_unsuspend(struct proc *p);
898 void thread_unsuspend_one(struct thread *td);
899 int thread_upcall_check(struct thread *td);
900 void thread_unthread(struct thread *td);
901 int thread_userret(struct thread *td, struct trapframe *frame);
902 void thread_user_enter(struct thread *td);
903 void thread_wait(struct proc *p);
904 int thread_statclock(int user);
905 struct kse_upcall *upcall_alloc(void);
906 void upcall_free(struct kse_upcall *ku);
907 void upcall_link(struct kse_upcall *ku, struct ksegrp *kg);
908 void upcall_unlink(struct kse_upcall *ku);
909 void upcall_remove(struct thread *td);
910 void upcall_stash(struct kse_upcall *ke);
911 void thread_sanity_check(struct thread *td, char *);
912 void thread_stopped(struct proc *p);
913 struct thread *thread_switchout(struct thread *td, int flags,
914 struct thread *newtd);
915 void thread_continued(struct proc *p);
916 void thr_exit1(void);
917 #endif /* _KERNEL */
918
919 #endif /* !_SYS_PROC_H_ */
Cache object: 044f58a67ab8d476eb202af7b5fe7a39
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