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: src/sys/sys/proc.h,v 1.392.2.20 2005/04/24 23:20:52 davidxu Exp $
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 TAILQ_ENTRY(thread) td_umtx; /* (c?) Link for when we're blocked. */
285 volatile u_int td_generation; /* (k) Enable detection of preemption */
286 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */
287 int td_kflags; /* (c) Flags for KSE threading. */
288 int td_xsig; /* (c) Signal for ptrace */
289 u_long td_profil_addr; /* (k) Temporary addr until AST. */
290 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */
291
292 #define td_endzero td_base_pri
293
294 /* Copied during fork1() or thread_sched_upcall(). */
295 #define td_startcopy td_endzero
296 u_char td_base_pri; /* (j) Thread base kernel priority. */
297 u_char td_priority; /* (j) Thread active priority. */
298 #define td_endcopy td_pcb
299
300 /*
301 * fields that must be manually set in fork1() or thread_sched_upcall()
302 * or already have been set in the allocator, contstructor, etc..
303 */
304 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
305 enum {
306 TDS_INACTIVE = 0x0,
307 TDS_INHIBITED,
308 TDS_CAN_RUN,
309 TDS_RUNQ,
310 TDS_RUNNING
311 } td_state;
312 register_t td_retval[2]; /* (k) Syscall aux returns. */
313 struct callout td_slpcallout; /* (h) Callout for sleep. */
314 struct trapframe *td_frame; /* (k) */
315 struct vm_object *td_kstack_obj;/* (a) Kstack object. */
316 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
317 int td_kstack_pages; /* (a) Size of the kstack. */
318 struct vm_object *td_altkstack_obj;/* (a) Alternate kstack object. */
319 vm_offset_t td_altkstack; /* (a) Kernel VA of alternate kstack. */
320 int td_altkstack_pages; /* (a) Size of alternate kstack. */
321 u_int td_critnest; /* (k) Critical section nest level. */
322 struct mdthread td_md; /* (k) Any machine-dependent fields. */
323 struct td_sched *td_sched; /* (*) Scheduler-specific data. */
324 };
325
326 /*
327 * Flags kept in td_flags:
328 * To change these you MUST have the scheduler lock.
329 */
330 #define TDF_UNUSED0 0x00000001 /* --available -- */
331 #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */
332 #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */
333 #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */
334 #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */
335 #define TDF_SELECT 0x00000040 /* Selecting; wakeup/waiting danger. */
336 #define TDF_UNUSED7 0x00000080 /* --available -- */
337 #define TDF_TSNOBLOCK 0x00000100 /* Don't block on a turnstile due to race. */
338 #define TDF_UNUSED9 0x00000200 /* --available -- */
339 #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */
340 #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */
341 #define TDF_TIMOFAIL 0x00001000 /* Timeout from sleep after we were awake. */
342 #define TDF_INTERRUPT 0x00002000 /* Thread is marked as interrupted. */
343 #define TDF_UNUSED14 0x00004000 /* --available -- */
344 #define TDF_UNUSED15 0x00008000 /* --available -- */
345 #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */
346 #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */
347 #define TDF_XSIG 0x00040000 /* Thread is exchanging signal under trace */
348 #define TDF_UMTXWAKEUP 0x00080000 /* Libthr thread must not sleep on a umtx. */
349 #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */
350 #define TDF_DBSUSPEND 0x00200000 /* Thread is suspended by debugger */
351 #define TDF_UNUSED22 0x00400000 /* --available -- */
352 #define TDF_UNUSED23 0x00800000 /* --available -- */
353 #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */
354 #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */
355 #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */
356 #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */
357
358 /*
359 * "Private" flags kept in td_pflags:
360 * These are only accessed by curthread and thus need no locking.
361 */
362 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */
363 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */
364 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */
365 #define TDP_UPCALLING 0x00000008 /* This thread is doing an upcall. */
366 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */
367 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */
368 #define TDP_DEADLKTREAT 0x00000040 /* Lock aquisition - deadlock treatment. */
369 #define TDP_SA 0x00000080 /* A scheduler activation based thread. */
370 #define TDP_OWEPREEMPT 0x00000100 /* Thread has a pending preemption. */
371 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */
372 #define TDP_WAKEPROC0 0x00000400 /* Wants caller to wakeup(&proc0) */
373 #define TDP_CAN_UNBIND 0x00000800 /* Only temporarily bound. */
374 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */
375 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */
376 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */
377 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */
378 #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */
379 #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */
380
381 /*
382 * Reasons that the current thread can not be run yet.
383 * More than one may apply.
384 */
385 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */
386 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
387 #define TDI_SWAPPED 0x0004 /* Stack not in mem.. bad juju if run. */
388 #define TDI_LOCK 0x0008 /* Stopped on a lock. */
389 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
390
391 /*
392 * flags (in kflags) related to M:N threading.
393 */
394 #define TDK_KSEREL 0x0001 /* Blocked in msleep on kg->kg_completed. */
395 #define TDK_KSERELSIG 0x0002 /* Blocked in msleep on p->p_siglist. */
396 #define TDK_WAKEUP 0x0004 /* Thread has been woken by kse_wakeup. */
397
398 #define TD_CAN_UNBIND(td) \
399 (((td)->td_pflags & TDP_CAN_UNBIND) && \
400 ((td)->td_upcall != NULL))
401
402 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
403 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
404 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
405 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
406 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
407 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
408 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
409 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
410 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
411 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
412
413 #define TD_SET_INHIB(td, inhib) do { \
414 (td)->td_state = TDS_INHIBITED; \
415 (td)->td_inhibitors |= (inhib); \
416 } while (0)
417
418 #define TD_CLR_INHIB(td, inhib) do { \
419 if (((td)->td_inhibitors & (inhib)) && \
420 (((td)->td_inhibitors &= ~(inhib)) == 0)) \
421 (td)->td_state = TDS_CAN_RUN; \
422 } while (0)
423
424 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
425 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
426 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
427 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
428 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
429 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
430
431 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
432 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
433 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
434 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
435 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
436
437 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING
438 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ
439 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN
440
441 /*
442 * The upcall management structure.
443 * The upcall is used when returning to userland. If a thread does not have
444 * an upcall on return to userland the thread exports its context and exits.
445 */
446 struct kse_upcall {
447 TAILQ_ENTRY(kse_upcall) ku_link; /* List of upcalls in KSEG. */
448 struct ksegrp *ku_ksegrp; /* Associated KSEG. */
449 struct thread *ku_owner; /* owning thread */
450 int ku_flags; /* KUF_* flags. */
451 struct kse_mailbox *ku_mailbox; /* userland mailbox address. */
452 stack_t ku_stack; /* userland upcall stack. */
453 void *ku_func; /* userland upcall function. */
454 unsigned int ku_mflags; /* cached upcall mailbox flags */
455 };
456
457 #define KUF_DOUPCALL 0x00001 /* Do upcall now, don't wait. */
458 #define KUF_EXITING 0x00002 /* Upcall structure is exiting. */
459
460 /*
461 * Kernel-scheduled entity group (KSEG). The scheduler considers each KSEG to
462 * be an indivisible unit from a time-sharing perspective, though each KSEG may
463 * contain multiple KSEs.
464 */
465 struct ksegrp {
466 struct proc *kg_proc; /* (*) Process that contains this KSEG. */
467 TAILQ_ENTRY(ksegrp) kg_ksegrp; /* (*) Queue of KSEGs in kg_proc. */
468 TAILQ_HEAD(, thread) kg_threads;/* (td_kglist) All threads. */
469 TAILQ_HEAD(, thread) kg_runq; /* (td_runq) waiting RUNNABLE threads */
470 TAILQ_HEAD(, thread) kg_slpq; /* (td_runq) NONRUNNABLE threads. */
471 TAILQ_HEAD(, kse_upcall) kg_upcalls; /* All upcalls in the group. */
472 #define kg_startzero kg_estcpu
473 u_int kg_estcpu; /* (j) Sum of the same field in KSEs. */
474 u_int kg_slptime; /* (j) How long completely blocked. */
475 int kg_runnable; /* (j) Num runnable threads on queue. */
476 int kg_numupcalls; /* (j) Num upcalls. */
477 int kg_upsleeps; /* (c) Num threads in kse_release(). */
478 struct kse_thr_mailbox *kg_completed; /* (c) Completed thread mboxes. */
479 int kg_nextupcall; /* (*) Next upcall time. */
480 int kg_upquantum; /* (*) Quantum to schedule an upcall. */
481 #define kg_endzero kg_pri_class
482
483 #define kg_startcopy kg_endzero
484 u_char kg_pri_class; /* (j) Scheduling class. */
485 u_char kg_user_pri; /* (j) User pri from estcpu and nice. */
486 #define kg_endcopy kg_numthreads
487 int kg_numthreads; /* (j) Num threads in total. */
488 struct kg_sched *kg_sched; /* (*) Scheduler-specific data. */
489 };
490
491 /*
492 * The old fashionned process. May have multiple threads, KSEGRPs
493 * and KSEs. Starts off with a single embedded KSEGRP and THREAD.
494 */
495 struct proc {
496 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
497 TAILQ_HEAD(, ksegrp) p_ksegrps; /* (c)(kg_ksegrp) All KSEGs. */
498 TAILQ_HEAD(, thread) p_threads; /* (j)(td_plist) Threads. (shortcut) */
499 TAILQ_HEAD(, thread) p_suspended; /* (td_runq) Suspended threads. */
500 struct ucred *p_ucred; /* (c) Process owner's identity. */
501 struct filedesc *p_fd; /* (b) Ptr to open files structure. */
502 struct filedesc_to_leader *p_fdtol; /* (b) Ptr to tracking node */
503 /* Accumulated stats for all threads? */
504 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
505 struct plimit *p_limit; /* (c) Process limits. */
506 struct vm_object *p_unused1; /* (a) Former upages object */
507 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */
508 /*
509 * The following don't make too much sense..
510 * See the td_ or ke_ versions of the same flags
511 */
512 int p_flag; /* (c) P_* flags. */
513 int p_sflag; /* (j) PS_* flags. */
514 enum {
515 PRS_NEW = 0, /* In creation */
516 PRS_NORMAL, /* threads can be run. */
517 PRS_ZOMBIE
518 } p_state; /* (j/c) S* process status. */
519 pid_t p_pid; /* (b) Process identifier. */
520 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
521 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
522 struct proc *p_pptr; /* (c + e) Pointer to parent process. */
523 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
524 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
525 struct mtx p_mtx; /* (n) Lock for this struct. */
526
527 /* The following fields are all zeroed upon creation in fork. */
528 #define p_startzero p_oppid
529 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */
530 struct vmspace *p_vmspace; /* (b) Address space. */
531 u_int p_swtime; /* (j) Time swapped in or out. */
532 struct itimerval p_realtimer; /* (c) Alarm timer. */
533 struct bintime p_runtime; /* (j) Real time. */
534 u_int64_t p_uu; /* (j) Previous user time in usec. */
535 u_int64_t p_su; /* (j) Previous system time in usec. */
536 u_int64_t p_iu; /* (j) Previous intr time in usec. */
537 u_int64_t p_uticks; /* (j) Statclock hits in user mode. */
538 u_int64_t p_sticks; /* (j) Statclock hits in system mode. */
539 u_int64_t p_iticks; /* (j) Statclock hits in intr. */
540 int p_profthreads; /* (c) Num threads in addupc_task. */
541 int p_maxthrwaits; /* (c) Max threads num waiters */
542 int p_traceflag; /* (o) Kernel trace points. */
543 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */
544 struct ucred *p_tracecred; /* (o) Credentials to trace with. */
545 struct vnode *p_textvp; /* (b) Vnode of executable. */
546 sigset_t p_siglist; /* (c) Sigs not delivered to a td. */
547 char p_lock; /* (c) Proclock (prevent swap) count. */
548 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
549 int p_sigparent; /* (c) Signal to parent on exit. */
550 int p_sig; /* (n) For core dump/debugger XXX. */
551 u_long p_code; /* (n) For core dump/debugger XXX. */
552 u_int p_stops; /* (c) Stop event bitmask. */
553 u_int p_stype; /* (c) Stop event type. */
554 char p_step; /* (c) Process is stopped. */
555 u_char p_pfsflags; /* (c) Procfs flags. */
556 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
557 void *p_aioinfo; /* (?) ASYNC I/O info. */
558 struct thread *p_singlethread;/* (c + j) If single threading this is it */
559 int p_suspcount; /* (c) # threads in suspended mode */
560 struct thread *p_xthread; /* (c) Trap thread */
561 int p_boundary_count;/* (c) Num threads at user boundary */
562 /* End area that is zeroed on creation. */
563 #define p_endzero p_magic
564
565 /* The following fields are all copied upon creation in fork. */
566 #define p_startcopy p_endzero
567 u_int p_magic; /* (b) Magic number. */
568 char p_comm[MAXCOMLEN + 1]; /* (b) Process name. */
569 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
570 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
571 struct pargs *p_args; /* (c) Process arguments. */
572 rlim_t p_cpulimit; /* (j) Current CPU limit in seconds. */
573 signed char p_nice; /* (c + j) Process "nice" value. */
574 /* End area that is copied on creation. */
575 #define p_endcopy p_xstat
576
577 u_short p_xstat; /* (c) Exit status; also stop sig. */
578 struct knlist p_klist; /* (c) Knotes attached to this proc. */
579 int p_numthreads; /* (j) Number of threads. */
580 int p_numksegrps; /* (c) number of ksegrps */
581 struct mdproc p_md; /* Any machine-dependent fields. */
582 struct callout p_itcallout; /* (h + c) Interval timer callout. */
583 struct user *p_unused2; /* (k) Formerly U-area. */
584 u_short p_acflag; /* (c) Accounting flags. */
585 struct rusage *p_ru; /* (a) Exit information. XXX */
586 struct proc *p_peers; /* (r) */
587 struct proc *p_leader; /* (b) */
588 void *p_emuldata; /* (c) Emulator state data. */
589 struct label *p_label; /* (*) Proc (not subject) MAC label. */
590 struct p_sched *p_sched; /* (*) Scheduler-specific data. */
591 };
592
593 #define p_session p_pgrp->pg_session
594 #define p_pgid p_pgrp->pg_id
595
596 #define NOCPU 0xff /* For when we aren't on a CPU. (SMP) */
597
598 /* Status values (p_stat). */
599
600 /* These flags are kept in p_flag. */
601 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
602 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
603 #define P_KTHREAD 0x00004 /* Kernel thread. (*)*/
604 #define P_NOLOAD 0x00008 /* Ignore during load avg calculations. */
605 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
606 #define P_PROFIL 0x00020 /* Has started profiling. */
607 #define P_STOPPROF 0x00040 /* Has thread in requesting to stop prof */
608 #define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */
609 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
610 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
611 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */
612 #define P_TRACED 0x00800 /* Debugged process being traced. */
613 #define P_WAITED 0x01000 /* Someone is waiting for us. */
614 #define P_WEXIT 0x02000 /* Working on exiting. */
615 #define P_EXEC 0x04000 /* Process called exec. */
616 #define P_SA 0x08000 /* Using scheduler activations. */
617 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
618 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */
619 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */
620 #define P_STOPPED_SINGLE 0x80000 /* Only one thread can continue */
621 /* (not to user) */
622 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
623 #define P_SIGEVENT 0x200000 /* Process pending signals changed. */
624 #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */
625
626 #define P_JAILED 0x1000000 /* Process is in jail. */
627 #define P_INEXEC 0x4000000 /* Process is in execve(). */
628 #define P_STATCHILD 0x8000000 /* Child process stopped or exited. */
629
630 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
631 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
632
633 /* These flags are kept in p_sflag and are protected with sched_lock. */
634 #define PS_INMEM 0x00001 /* Loaded into memory. */
635 #define PS_XCPU 0x00002 /* Exceeded CPU limit. */
636 #define PS_ALRMPEND 0x00020 /* Pending SIGVTALRM needs to be posted. */
637 #define PS_PROFPEND 0x00040 /* Pending SIGPROF needs to be posted. */
638 #define PS_SWAPINREQ 0x00100 /* Swapin request due to wakeup. */
639 #define PS_SWAPPINGOUT 0x00200 /* Process is being swapped out. */
640 #define PS_SWAPPINGIN 0x04000 /* Process is being swapped in. */
641 #define PS_MACPEND 0x08000 /* Ast()-based MAC event pending. */
642
643 /* used only in legacy conversion code */
644 #define SIDL 1 /* Process being created by fork. */
645 #define SRUN 2 /* Currently runnable. */
646 #define SSLEEP 3 /* Sleeping on an address. */
647 #define SSTOP 4 /* Process debugging or suspension. */
648 #define SZOMB 5 /* Awaiting collection by parent. */
649 #define SWAIT 6 /* Waiting for interrupt. */
650 #define SLOCK 7 /* Blocked on a lock. */
651
652 #define P_MAGIC 0xbeefface
653
654 #ifdef _KERNEL
655
656 /* Flags for mi_switch(). */
657 #define SW_VOL 0x0001 /* Voluntary switch. */
658 #define SW_INVOL 0x0002 /* Involuntary switch. */
659 #define SW_PREEMPT 0x0004 /* The invol switch is a preemption */
660
661 /* Flags for setrunqueue(). Why are we setting this thread on the run queue? */
662 #define SRQ_BORING 0x0000 /* No special circumstances. */
663 #define SRQ_YIELDING 0x0001 /* We are yielding (from mi_switch). */
664 #define SRQ_OURSELF 0x0002 /* It is ourself (from mi_switch). */
665 #define SRQ_INTR 0x0004 /* It is probably urgent. */
666 #define SRQ_PREEMPTED 0x0008 /* has been preempted.. be kind */
667
668 /* How values for thread_single(). */
669 #define SINGLE_NO_EXIT 0
670 #define SINGLE_EXIT 1
671 #define SINGLE_BOUNDARY 2
672
673 /* XXXKSE: Missing values for thread_suspsend_check(). */
674
675 #ifdef MALLOC_DECLARE
676 MALLOC_DECLARE(M_PARGS);
677 MALLOC_DECLARE(M_PGRP);
678 MALLOC_DECLARE(M_SESSION);
679 MALLOC_DECLARE(M_SUBPROC);
680 MALLOC_DECLARE(M_ZOMBIE);
681 #endif
682
683 #define FOREACH_PROC_IN_SYSTEM(p) \
684 LIST_FOREACH((p), &allproc, p_list)
685 #define FOREACH_KSEGRP_IN_PROC(p, kg) \
686 TAILQ_FOREACH((kg), &(p)->p_ksegrps, kg_ksegrp)
687 #define FOREACH_THREAD_IN_GROUP(kg, td) \
688 TAILQ_FOREACH((td), &(kg)->kg_threads, td_kglist)
689 #define FOREACH_UPCALL_IN_GROUP(kg, ku) \
690 TAILQ_FOREACH((ku), &(kg)->kg_upcalls, ku_link)
691 #define FOREACH_THREAD_IN_PROC(p, td) \
692 TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
693
694 /* XXXKSE the lines below should probably only be used in 1:1 code */
695 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads)
696 #define FIRST_KSEGRP_IN_PROC(p) TAILQ_FIRST(&(p)->p_ksegrps)
697
698 /*
699 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
700 * as it is used to represent "no process group".
701 */
702 #define PID_MAX 99999
703 #define NO_PID 100000
704
705 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
706 #define SESSHOLD(s) ((s)->s_count++)
707 #define SESSRELE(s) { \
708 if (--(s)->s_count == 0) \
709 FREE(s, M_SESSION); \
710 }
711
712 #define STOPEVENT(p, e, v) do { \
713 if ((p)->p_stops & (e)) { \
714 PROC_LOCK(p); \
715 stopevent((p), (e), (v)); \
716 PROC_UNLOCK(p); \
717 } \
718 } while (0)
719 #define _STOPEVENT(p, e, v) do { \
720 PROC_LOCK_ASSERT(p, MA_OWNED); \
721 if ((p)->p_stops & (e)) \
722 stopevent((p), (e), (v)); \
723 } while (0)
724
725 /* Lock and unlock a process. */
726 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
727 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
728 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
729 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
730 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
731
732 /* Lock and unlock a process group. */
733 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
734 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
735 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
736 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
737
738 #define PGRP_LOCK_PGSIGNAL(pg) do { \
739 if ((pg) != NULL) \
740 PGRP_LOCK(pg); \
741 } while (0)
742 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \
743 if ((pg) != NULL) \
744 PGRP_UNLOCK(pg); \
745 } while (0)
746
747 /* Lock and unlock a session. */
748 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
749 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
750 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
751 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
752
753 /* Hold process U-area in memory, normally for ptrace/procfs work. */
754 #define PHOLD(p) do { \
755 PROC_LOCK(p); \
756 _PHOLD(p); \
757 PROC_UNLOCK(p); \
758 } while (0)
759 #define _PHOLD(p) do { \
760 PROC_LOCK_ASSERT((p), MA_OWNED); \
761 (p)->p_lock++; \
762 if (((p)->p_sflag & PS_INMEM) == 0) \
763 faultin((p)); \
764 } while (0)
765
766 #define PRELE(p) do { \
767 PROC_LOCK((p)); \
768 _PRELE((p)); \
769 PROC_UNLOCK((p)); \
770 } while (0)
771 #define _PRELE(p) do { \
772 PROC_LOCK_ASSERT((p), MA_OWNED); \
773 (--(p)->p_lock); \
774 } while (0)
775
776 /* Check whether a thread is safe to be swapped out. */
777 #define thread_safetoswapout(td) (TD_IS_SLEEPING(td) || TD_IS_SUSPENDED(td))
778
779 /* Lock and unlock process arguments. */
780 #define PARGS_LOCK(p) mtx_lock(&pargs_ref_lock)
781 #define PARGS_UNLOCK(p) mtx_unlock(&pargs_ref_lock)
782
783 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
784 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
785 extern u_long pidhash;
786
787 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
788 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
789 extern u_long pgrphash;
790
791 extern struct sx allproc_lock;
792 extern struct sx proctree_lock;
793 extern struct mtx pargs_ref_lock;
794 extern struct mtx ppeers_lock;
795 extern struct proc proc0; /* Process slot for swapper. */
796 extern struct thread thread0; /* Primary thread in proc0. */
797 extern struct ksegrp ksegrp0; /* Primary ksegrp in proc0. */
798 extern struct vmspace vmspace0; /* VM space for proc0. */
799 extern int hogticks; /* Limit on kernel cpu hogs. */
800 extern int nprocs, maxproc; /* Current and max number of procs. */
801 extern int maxprocperuid; /* Max procs per uid. */
802 extern u_long ps_arg_cache_limit;
803 extern int sched_quantum; /* Scheduling quantum in ticks. */
804
805 LIST_HEAD(proclist, proc);
806 TAILQ_HEAD(procqueue, proc);
807 TAILQ_HEAD(threadqueue, thread);
808 extern struct proclist allproc; /* List of all processes. */
809 extern struct proclist zombproc; /* List of zombie processes. */
810 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
811 extern struct proc *updateproc; /* Process slot for syncer (sic). */
812
813 extern struct uma_zone *proc_zone;
814
815 extern int lastpid;
816
817 struct proc *pfind(pid_t); /* Find process by id. */
818 struct pgrp *pgfind(pid_t); /* Find process group by id. */
819 struct proc *zpfind(pid_t); /* Find zombie process by id. */
820
821 void adjustrunqueue(struct thread *, int newpri);
822 void ast(struct trapframe *framep);
823 struct thread *choosethread(void);
824 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
825 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, struct session *sess);
826 int enterthispgrp(struct proc *p, struct pgrp *pgrp);
827 void faultin(struct proc *p);
828 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
829 int fork1(struct thread *, int, int, struct proc **);
830 void fork_exit(void (*)(void *, struct trapframe *), void *,
831 struct trapframe *);
832 void fork_return(struct thread *, struct trapframe *);
833 int inferior(struct proc *p);
834 int leavepgrp(struct proc *p);
835 int maybe_preempt(struct thread *td);
836 void mi_switch(int flags, struct thread *newtd);
837 int p_candebug(struct thread *td, struct proc *p);
838 int p_cansee(struct thread *td, struct proc *p);
839 int p_cansched(struct thread *td, struct proc *p);
840 int p_cansignal(struct thread *td, struct proc *p, int signum);
841 struct pargs *pargs_alloc(int len);
842 void pargs_drop(struct pargs *pa);
843 void pargs_free(struct pargs *pa);
844 void pargs_hold(struct pargs *pa);
845 void procinit(void);
846 void threadinit(void);
847 void proc_linkup(struct proc *p, struct ksegrp *kg, struct thread *td);
848 void proc_reparent(struct proc *child, struct proc *newparent);
849 struct pstats *pstats_alloc(void);
850 void pstats_fork(struct pstats *src, struct pstats *dst);
851 void pstats_free(struct pstats *ps);
852 int securelevel_ge(struct ucred *cr, int level);
853 int securelevel_gt(struct ucred *cr, int level);
854 void setrunnable(struct thread *);
855 void setrunqueue(struct thread *, int flags);
856 void setsugid(struct proc *p);
857 int sigonstack(size_t sp);
858 void sleepinit(void);
859 void stopevent(struct proc *, u_int, u_int);
860 void cpu_idle(void);
861 extern void (*cpu_idle_hook)(void); /* Hook to machdep CPU idler. */
862 void cpu_switch(struct thread *old, struct thread *new);
863 void cpu_throw(struct thread *old, struct thread *new) __dead2;
864 void unsleep(struct thread *);
865 void userret(struct thread *, struct trapframe *, u_int);
866
867 void cpu_exit(struct thread *);
868 void exit1(struct thread *, int) __dead2;
869 void cpu_fork(struct thread *, struct proc *, struct thread *, int);
870 void cpu_set_fork_handler(struct thread *, void (*)(void *), void *);
871
872 /* New in KSE. */
873 struct ksegrp *ksegrp_alloc(void);
874 void ksegrp_free(struct ksegrp *kg);
875 void ksegrp_stash(struct ksegrp *kg);
876 void kse_GC(void);
877 void kseinit(void);
878 void cpu_set_upcall(struct thread *td, struct thread *td0);
879 void cpu_set_upcall_kse(struct thread *td, struct kse_upcall *ku);
880 void cpu_thread_clean(struct thread *);
881 void cpu_thread_exit(struct thread *);
882 void cpu_thread_setup(struct thread *td);
883 void cpu_thread_siginfo(int sig, u_long code, siginfo_t *si);
884 void cpu_thread_swapin(struct thread *);
885 void cpu_thread_swapout(struct thread *);
886 void ksegrp_link(struct ksegrp *kg, struct proc *p);
887 void ksegrp_unlink(struct ksegrp *kg);
888 void thread_signal_add(struct thread *td, int sig);
889 struct thread *thread_alloc(void);
890 void thread_exit(void) __dead2;
891 int thread_export_context(struct thread *td, int willexit);
892 void thread_free(struct thread *td);
893 void thread_link(struct thread *td, struct ksegrp *kg);
894 void thread_reap(void);
895 struct thread *thread_schedule_upcall(struct thread *td, struct kse_upcall *ku);
896 int thread_single(int how);
897 void thread_single_end(void);
898 int thread_sleep_check(struct thread *td);
899 void thread_stash(struct thread *td);
900 int thread_suspend_check(int how);
901 void thread_suspend_one(struct thread *td);
902 void thread_unlink(struct thread *td);
903 void thread_unsuspend(struct proc *p);
904 void thread_unsuspend_one(struct thread *td);
905 int thread_upcall_check(struct thread *td);
906 void thread_unthread(struct thread *td);
907 int thread_userret(struct thread *td, struct trapframe *frame);
908 void thread_user_enter(struct thread *td);
909 void thread_wait(struct proc *p);
910 int thread_statclock(int user);
911 struct kse_upcall *upcall_alloc(void);
912 void upcall_free(struct kse_upcall *ku);
913 void upcall_link(struct kse_upcall *ku, struct ksegrp *kg);
914 void upcall_unlink(struct kse_upcall *ku);
915 void upcall_remove(struct thread *td);
916 void upcall_stash(struct kse_upcall *ke);
917 void thread_sanity_check(struct thread *td, char *);
918 void thread_stopped(struct proc *p);
919 struct thread *thread_switchout(struct thread *td, int flags,
920 struct thread *newtd);
921 void thread_continued(struct proc *p);
922 void thr_exit1(void);
923 #endif /* _KERNEL */
924
925 #endif /* !_SYS_PROC_H_ */
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