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 * $FreeBSD$
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/resource.h>
53 #include <sys/sigio.h>
54 #include <sys/signal.h>
55 #include <sys/signalvar.h>
56 #ifndef _KERNEL
57 #include <sys/time.h> /* For structs itimerval, timeval. */
58 #else
59 #include <sys/pcpu.h>
60 #endif
61 #include <sys/ucontext.h>
62 #include <sys/ucred.h>
63 #include <machine/proc.h> /* Machine-dependent proc substruct. */
64
65 /*
66 * One structure allocated per session.
67 *
68 * List of locks
69 * (m) locked by s_mtx mtx
70 * (e) locked by proctree_lock sx
71 * (c) const until freeing
72 */
73 struct session {
74 int s_count; /* (m) Ref cnt; pgrps in session. */
75 struct proc *s_leader; /* (m + e) Session leader. */
76 struct vnode *s_ttyvp; /* (m) Vnode of controlling tty. */
77 struct tty *s_ttyp; /* (m) Controlling tty. */
78 pid_t s_sid; /* (c) Session ID. */
79 /* (m) Setlogin() name: */
80 char s_login[roundup(MAXLOGNAME, sizeof(long))];
81 struct mtx s_mtx; /* Mutex to protect members. */
82 };
83
84 /*
85 * One structure allocated per process group.
86 *
87 * List of locks
88 * (m) locked by pg_mtx mtx
89 * (e) locked by proctree_lock sx
90 * (c) const until freeing
91 */
92 struct pgrp {
93 LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */
94 LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */
95 struct session *pg_session; /* (c) Pointer to session. */
96 struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */
97 pid_t pg_id; /* (c) Process group id. */
98 int pg_jobc; /* (m) Job control process count. */
99 struct mtx pg_mtx; /* Mutex to protect members */
100 };
101
102 /*
103 * pargs, used to hold a copy of the command line, if it had a sane length.
104 */
105 struct pargs {
106 u_int ar_ref; /* Reference count. */
107 u_int ar_length; /* Length. */
108 u_char ar_args[1]; /* Arguments. */
109 };
110
111 /*-
112 * Description of a process.
113 *
114 * This structure contains the information needed to manage a thread of
115 * control, known in UN*X as a process; it has references to substructures
116 * containing descriptions of things that the process uses, but may share
117 * with related processes. The process structure and the substructures
118 * are always addressable except for those marked "(CPU)" below,
119 * which might be addressable only on a processor on which the process
120 * is running.
121 *
122 * Below is a key of locks used to protect each member of struct proc. The
123 * lock is indicated by a reference to a specific character in parens in the
124 * associated comment.
125 * * - not yet protected
126 * a - only touched by curproc or parent during fork/wait
127 * b - created at fork, never changes
128 * (exception aiods switch vmspaces, but they are also
129 * marked 'P_SYSTEM' so hopefully it will be left alone)
130 * c - locked by proc mtx
131 * d - locked by allproc_lock lock
132 * e - locked by proctree_lock lock
133 * f - session mtx
134 * g - process group mtx
135 * h - callout_lock mtx
136 * i - by curproc or the master session mtx
137 * j - locked by proc slock
138 * k - only accessed by curthread
139 * k*- only accessed by curthread and from an interrupt
140 * l - the attaching proc or attaching proc parent
141 * m - Giant
142 * n - not locked, lazy
143 * o - ktrace lock
144 * p - select lock (sellock)
145 * q - td_contested lock
146 * r - p_peers lock
147 * t - thread lock
148 * x - created at fork, only changes during single threading in exec
149 * z - zombie threads lock
150 *
151 * If the locking key specifies two identifiers (for example, p_pptr) then
152 * either lock is sufficient for read access, but both locks must be held
153 * for write access.
154 */
155 struct kaudit_record;
156 struct td_sched;
157 struct nlminfo;
158 struct kaioinfo;
159 struct p_sched;
160 struct proc;
161 struct sleepqueue;
162 struct thread;
163 struct trapframe;
164 struct turnstile;
165 struct mqueue_notifier;
166 struct cpuset;
167 struct kdtrace_proc;
168 struct kdtrace_thread;
169
170 /*
171 * Here we define the two structures used for process information.
172 *
173 * The first is the thread. It might be thought of as a "Kernel
174 * Schedulable Entity Context".
175 * This structure contains all the information as to where a thread of
176 * execution is now, or was when it was suspended, why it was suspended,
177 * and anything else that will be needed to restart it when it is
178 * rescheduled. It includes a scheduler specific substructure that is different
179 * for each scheduler.
180 *
181 * M:N notes.
182 * It is important to remember that when using M:N threading,
183 * a particular thread structure may only exist as long as
184 * the system call or kernel entrance (e.g. by pagefault)
185 * which it is currently executing. It should therefore NEVER be referenced
186 * by pointers in long lived structures that live longer than a single
187 * request. If several threads complete their work at the same time,
188 * they will all rewind their stacks to the user boundary, report their
189 * completion state, and all but one will be freed. That last one will
190 * be kept to provide a kernel stack and pcb for the NEXT syscall or kernel
191 * entrance (basically to save freeing and then re-allocating it). The existing
192 * thread keeps a cached spare thread available to allow it to quickly
193 * get one when it needs a new one. There is also a system
194 * cache of free threads. Threads have priority and partake in priority
195 * inheritance schemes.
196 *
197 * The second is the proc (process) which owns all the resources of a process
198 * other than CPU cycles, which are parceled out to the threads.
199 */
200
201 /*
202 * Kernel runnable context (thread).
203 * This is what is put to sleep and reactivated.
204 * Thread context. Processes may have multiple threads.
205 */
206 struct thread {
207 struct mtx *volatile td_lock; /* replaces sched lock */
208 struct proc *td_proc; /* (*) Associated process. */
209 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */
210
211 /* The two queues below should someday be merged. */
212 TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */
213 TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */
214 TAILQ_HEAD(, selinfo) td_selq; /* (p) List of selinfos. */
215 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */
216 struct turnstile *td_turnstile; /* (k) Associated turnstile. */
217 struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */
218 lwpid_t td_tid; /* (b) Thread ID. */
219 sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */
220 #define td_siglist td_sigqueue.sq_signals
221
222 /* Cleared during fork1() or thread_schedule_upcall(). */
223 #define td_startzero td_flags
224 int td_flags; /* (t) TDF_* flags. */
225 int td_inhibitors; /* (t) Why can not run. */
226 int td_pflags; /* (k) Private thread (TDP_*) flags. */
227 int td_dupfd; /* (k) Ret value from fdopen. XXX */
228 int td_sqqueue; /* (t) Sleepqueue queue blocked on. */
229 void *td_wchan; /* (t) Sleep address. */
230 const char *td_wmesg; /* (t) Reason for sleep. */
231 u_char td_lastcpu; /* (t) Last cpu we were on. */
232 u_char td_oncpu; /* (t) Which cpu we are on. */
233 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */
234 short td_locks; /* (k) Count of non-spin locks. */
235 u_char td_tsqueue; /* (t) Turnstile queue blocked on. */
236 struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */
237 const char *td_lockname; /* (t) Name of lock blocked on. */
238 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */
239 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
240 int td_intr_nesting_level; /* (k) Interrupt recursion. */
241 int td_pinned; /* (k) Temporary cpu pin count. */
242 struct kse_thr_mailbox *td_mailbox; /* (*) Userland mailbox address. */
243 struct ucred *td_ucred; /* (k) Reference to credentials. */
244 struct thread *td_standin; /* (k + a) Use this for an upcall. */
245 struct kse_upcall *td_upcall; /* (k + t) Upcall structure. */
246 u_int td_estcpu; /* (t) estimated cpu utilization */
247 u_int td_slptick; /* (t) Time at sleep. */
248 struct rusage td_ru; /* (t) rusage information */
249 uint64_t td_runtime; /* (t) How many cpu ticks we've run. */
250 u_int td_pticks; /* (t) Statclock hits for profiling */
251 u_int td_sticks; /* (t) Statclock hits in system mode. */
252 u_int td_iticks; /* (t) Statclock hits in intr mode. */
253 u_int td_uticks; /* (t) Statclock hits in user mode. */
254 u_int td_uuticks; /* (k) Statclock hits (usr), for UTS. */
255 u_int td_usticks; /* (k) Statclock hits (sys), for UTS. */
256 int td_intrval; /* (t) Return value of TDF_INTERRUPT. */
257 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */
258 sigset_t td_sigmask; /* (c) Current signal mask. */
259 volatile u_int td_generation; /* (k) For detection of preemption */
260 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */
261 int td_kflags; /* (c) Flags for KSE threading. */
262 int td_xsig; /* (c) Signal for ptrace */
263 u_long td_profil_addr; /* (k) Temporary addr until AST. */
264 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */
265 char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */
266 #define td_endzero td_base_pri
267
268 /* Copied during fork1() or thread_sched_upcall(). */
269 #define td_startcopy td_endzero
270 u_char td_base_pri; /* (t) Thread base kernel priority. */
271 u_char td_priority; /* (t) Thread active priority. */
272 u_char td_pri_class; /* (t) Scheduling class. */
273 u_char td_user_pri; /* (t) User pri from estcpu and nice. */
274 u_char td_base_user_pri; /* (t) Base user pri */
275 #define td_endcopy td_pcb
276
277 /*
278 * Fields that must be manually set in fork1() or thread_sched_upcall()
279 * or already have been set in the allocator, constructor, etc.
280 */
281 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
282 enum {
283 TDS_INACTIVE = 0x0,
284 TDS_INHIBITED,
285 TDS_CAN_RUN,
286 TDS_RUNQ,
287 TDS_RUNNING
288 } td_state; /* (t) thread state */
289 register_t td_retval[2]; /* (k) Syscall aux returns. */
290 struct callout td_slpcallout; /* (h) Callout for sleep. */
291 struct trapframe *td_frame; /* (k) */
292 struct vm_object *td_kstack_obj;/* (a) Kstack object. */
293 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
294 int td_kstack_pages; /* (a) Size of the kstack. */
295 struct vm_object *td_altkstack_obj;/* (a) Alternate kstack object. */
296 vm_offset_t td_altkstack; /* (a) Kernel VA of alternate kstack. */
297 int td_altkstack_pages; /* (a) Size of alternate kstack. */
298 volatile u_int td_critnest; /* (k*) Critical section nest level. */
299 struct mdthread td_md; /* (k) Any machine-dependent fields. */
300 struct td_sched *td_sched; /* (*) Scheduler-specific data. */
301 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */
302 int td_syscalls; /* per-thread syscall count (used by NFS :)) */
303 uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */
304 struct cpuset *td_cpuset; /* (t) CPU affinity mask. */
305 struct file *td_fpop; /* (k) file referencing cdev under op */
306 struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */
307 int td_errno; /* Error returned by last syscall. */
308 };
309
310 struct mtx *thread_lock_block(struct thread *);
311 void thread_lock_unblock(struct thread *, struct mtx *);
312 void thread_lock_set(struct thread *, struct mtx *);
313 #define THREAD_LOCK_ASSERT(td, type) \
314 do { \
315 struct mtx *__m = (td)->td_lock; \
316 if (__m != &blocked_lock) \
317 mtx_assert(__m, (type)); \
318 } while (0)
319
320 /*
321 * Flags kept in td_flags:
322 * To change these you MUST have the scheduler lock.
323 */
324 #define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */
325 #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */
326 #define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */
327 #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */
328 #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */
329 #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */
330 #define TDF_SELECT 0x00000040 /* Selecting; wakeup/waiting danger. */
331 #define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */
332 #define TDF_UNUSEDx100 0x00000100 /* --available-- */
333 #define TDF_UBORROWING 0x00000200 /* Thread is borrowing user pri. */
334 #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */
335 #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */
336 #define TDF_TIMOFAIL 0x00001000 /* Timeout from sleep after we were awake. */
337 #define TDF_INTERRUPT 0x00002000 /* Thread is marked as interrupted. */
338 #define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */
339 #define TDF_UNUSED15 0x00008000 /* --available-- */
340 #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */
341 #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */
342 #define TDF_XSIG 0x00040000 /* Thread is exchanging signal under trace */
343 #define TDF_UNUSED19 0x00080000 /* Thread is sleeping on a umtx. */
344 #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */
345 #define TDF_DBSUSPEND 0x00200000 /* Thread is suspended by debugger */
346 #define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */
347 #define TDF_UNUSED23 0x00800000 /* --available-- */
348 #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */
349 #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */
350 #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */
351 #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */
352 #define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */
353 #define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */
354 #define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */
355
356 /*
357 * "Private" flags kept in td_pflags:
358 * These are only accessed by curthread and thus need no locking.
359 */
360 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */
361 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */
362 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */
363 #define TDP_UPCALLING 0x00000008 /* This thread is doing an upcall. */
364 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */
365 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */
366 #define TDP_DEADLKTREAT 0x00000040 /* Lock aquisition - deadlock treatment. */
367 #define TDP_SA 0x00000080 /* A scheduler activation based thread. */
368 #define TDP_NOSLEEPING 0x00000100 /* Thread is not allowed to sleep on a sq. */
369 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */
370 #define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */
371 #define TDP_CAN_UNBIND 0x00000800 /* Only temporarily bound. */
372 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */
373 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */
374 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */
375 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */
376 #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */
377 #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */
378 #define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */
379 #define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */
380 #define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */
381
382 /*
383 * Reasons that the current thread can not be run yet.
384 * More than one may apply.
385 */
386 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */
387 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
388 #define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */
389 #define TDI_LOCK 0x0008 /* Stopped on a lock. */
390 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
391
392 /*
393 * flags (in kflags) related to M:N threading.
394 */
395 #define TDK_KSEREL 0x0001 /* Blocked in msleep on p->p_completed. */
396 #define TDK_KSERELSIG 0x0002 /* Blocked in msleep on p->p_siglist. */
397 #define TDK_WAKEUP 0x0004 /* Thread has been woken by kse_wakeup. */
398
399 #define TD_CAN_UNBIND(td) \
400 (((td)->td_pflags & TDP_CAN_UNBIND) && \
401 ((td)->td_upcall != NULL))
402
403 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
404 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
405 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
406 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
407 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
408 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
409 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
410 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
411 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
412 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
413 #define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED)
414 #if 0
415 #define TD_IS_IDLETHREAD(td) ((td) == pcpu(idlethread))
416 #else
417 #define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD)
418 #endif
419
420
421 #define TD_SET_INHIB(td, inhib) do { \
422 (td)->td_state = TDS_INHIBITED; \
423 (td)->td_inhibitors |= (inhib); \
424 } while (0)
425
426 #define TD_CLR_INHIB(td, inhib) do { \
427 if (((td)->td_inhibitors & (inhib)) && \
428 (((td)->td_inhibitors &= ~(inhib)) == 0)) \
429 (td)->td_state = TDS_CAN_RUN; \
430 } while (0)
431
432 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
433 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
434 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
435 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
436 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
437 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
438
439 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
440 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
441 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
442 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
443 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
444
445 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING
446 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ
447 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN
448
449 /*
450 * An upcall is used when returning to userland. If a thread does not have
451 * an upcall on return to userland the thread exports its context and exits.
452 */
453 struct kse_upcall {
454 TAILQ_ENTRY(kse_upcall) ku_link; /* List of upcalls in proc. */
455 struct proc *ku_proc; /* Associated proc. */
456 struct thread *ku_owner; /* Owning thread. */
457 int ku_flags; /* KUF_* flags. */
458 struct kse_mailbox *ku_mailbox; /* Userland mailbox address. */
459 stack_t ku_stack; /* Userland upcall stack. */
460 void *ku_func; /* Userland upcall function. */
461 unsigned int ku_mflags; /* Cached upcall mbox flags. */
462 };
463
464 #define KUF_DOUPCALL 0x00001 /* Do upcall now; don't wait. */
465 #define KUF_EXITING 0x00002 /* Upcall structure is exiting. */
466
467 /*
468 * XXX: Does this belong in resource.h or resourcevar.h instead?
469 * Resource usage extension. The times in rusage structs in the kernel are
470 * never up to date. The actual times are kept as runtimes and tick counts
471 * (with control info in the "previous" times), and are converted when
472 * userland asks for rusage info. Backwards compatibility prevents putting
473 * this directly in the user-visible rusage struct.
474 *
475 * Locking: (cj) means (j) for p_rux and (c) for p_crux.
476 */
477 struct rusage_ext {
478 u_int64_t rux_runtime; /* (cj) Real time. */
479 u_int64_t rux_uticks; /* (cj) Statclock hits in user mode. */
480 u_int64_t rux_sticks; /* (cj) Statclock hits in sys mode. */
481 u_int64_t rux_iticks; /* (cj) Statclock hits in intr mode. */
482 u_int64_t rux_uu; /* (c) Previous user time in usec. */
483 u_int64_t rux_su; /* (c) Previous sys time in usec. */
484 u_int64_t rux_tu; /* (c) Previous total time in usec. */
485 };
486
487 /*
488 * The old fashionned process. May have multiple threads.
489 * Starts off with a single embedded THREAD.
490 */
491 struct proc {
492 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
493 TAILQ_HEAD(, thread) p_threads; /* (j) all threads. */
494 TAILQ_HEAD(, kse_upcall) p_upcalls; /* (j) All upcalls in the proc. */
495 struct mtx p_slock; /* process spin lock */
496 struct ucred *p_ucred; /* (c) Process owner's identity. */
497 struct filedesc *p_fd; /* (b) Open files. */
498 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */
499 /* Accumulated stats for all threads? */
500 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
501 struct plimit *p_limit; /* (c) Process limits. */
502 struct callout p_limco; /* (c) Limit callout handle */
503 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */
504
505 /*
506 * The following don't make too much sense.
507 * See the td_ or ke_ versions of the same flags.
508 */
509 int p_flag; /* (c) P_* flags. */
510 enum {
511 PRS_NEW = 0, /* In creation */
512 PRS_NORMAL, /* threads can be run. */
513 PRS_ZOMBIE
514 } p_state; /* (j/c) S* process status. */
515 pid_t p_pid; /* (b) Process identifier. */
516 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
517 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
518 struct proc *p_pptr; /* (c + e) Pointer to parent process. */
519 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
520 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
521 struct mtx p_mtx; /* (n) Lock for this struct. */
522 struct ksiginfo *p_ksi; /* Locked by parent proc lock */
523 sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */
524 #define p_siglist p_sigqueue.sq_signals
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_swtick; /* (j) Tick when swapped in or out. */
531 struct itimerval p_realtimer; /* (c) Alarm timer. */
532 struct rusage p_ru; /* (a) Exit information. */
533 struct rusage_ext p_rux; /* (cj) Internal resource usage. */
534 struct rusage_ext p_crux; /* (c) Internal child resource usage. */
535 int p_profthreads; /* (c) Num threads in addupc_task. */
536 volatile int p_exitthreads; /* (j) Number of threads exiting */
537 int p_traceflag; /* (o) Kernel trace points. */
538 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */
539 struct ucred *p_tracecred; /* (o) Credentials to trace with. */
540 struct vnode *p_textvp; /* (b) Vnode of executable. */
541 char p_lock; /* (c) Proclock (prevent swap) count. */
542 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
543 int p_sigparent; /* (c) Signal to parent on exit. */
544 int p_sig; /* (n) For core dump/debugger XXX. */
545 u_long p_code; /* (n) For core dump/debugger XXX. */
546 u_int p_stops; /* (c) Stop event bitmask. */
547 u_int p_stype; /* (c) Stop event type. */
548 char p_step; /* (c) Process is stopped. */
549 u_char p_pfsflags; /* (c) Procfs flags. */
550 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
551 struct kaioinfo *p_aioinfo; /* (c) ASYNC I/O info. */
552 struct thread *p_singlethread;/* (c + j) If single threading this is it */
553 int p_suspcount; /* (j) Num threads in suspended mode. */
554 struct thread *p_xthread; /* (c) Trap thread */
555 int p_boundary_count;/* (c) Num threads at user boundary */
556 int p_pendingcnt; /* how many signals are pending */
557 struct itimers *p_itimers; /* (c) POSIX interval timers. */
558 int p_numupcalls; /* (j) Num upcalls. */
559 int p_upsleeps; /* (c) Num threads in kse_release(). */
560 struct kse_thr_mailbox *p_completed; /* (c) Completed thread mboxes. */
561 int p_nextupcall; /* (n) Next upcall time. */
562 int p_upquantum; /* (n) Quantum to schedule an upcall. */
563 /* End area that is zeroed on creation. */
564 #define p_endzero p_magic
565
566 /* The following fields are all copied upon creation in fork. */
567 #define p_startcopy p_endzero
568 u_int p_magic; /* (b) Magic number. */
569 int p_osrel; /* (x) osreldate for the
570 binary (from ELF note, if any) */
571 char p_comm[MAXCOMLEN + 1]; /* (b) Process name. */
572 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
573 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
574 struct pargs *p_args; /* (c) Process arguments. */
575 rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */
576 signed char p_nice; /* (c + j) Process "nice" value. */
577 int p_fibnum; /* in this routing domain XXX MRT */
578 /* End area that is copied on creation. */
579 #define p_endcopy p_xstat
580
581 u_short p_xstat; /* (c) Exit status; also stop sig. */
582 struct knlist p_klist; /* (c) Knotes attached to this proc. */
583 int p_numthreads; /* (j) Number of threads. */
584 struct mdproc p_md; /* Any machine-dependent fields. */
585 struct callout p_itcallout; /* (h + c) Interval timer callout. */
586 u_short p_acflag; /* (c) Accounting flags. */
587 struct proc *p_peers; /* (r) */
588 struct proc *p_leader; /* (b) */
589 void *p_emuldata; /* (c) Emulator state data. */
590 struct label *p_label; /* (*) Proc (not subject) MAC label. */
591 struct p_sched *p_sched; /* (*) Scheduler-specific data. */
592 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */
593 LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/
594 struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */
595 };
596
597 #define p_session p_pgrp->pg_session
598 #define p_pgid p_pgrp->pg_id
599
600 #define NOCPU 0xff /* For when we aren't on a CPU. */
601
602 #define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock)
603 #define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock)
604 #define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type))
605
606 /* These flags are kept in p_flag. */
607 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
608 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
609 #define P_KTHREAD 0x00004 /* Kernel thread (*). */
610 #define P_NOLOAD 0x00008 /* Ignore during load avg calculations. */
611 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
612 #define P_PROFIL 0x00020 /* Has started profiling. */
613 #define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */
614 #define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */
615 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
616 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
617 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */
618 #define P_TRACED 0x00800 /* Debugged process being traced. */
619 #define P_WAITED 0x01000 /* Someone is waiting for us. */
620 #define P_WEXIT 0x02000 /* Working on exiting. */
621 #define P_EXEC 0x04000 /* Process called exec. */
622 #define P_SA 0x08000 /* Using scheduler activations. */
623 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
624 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */
625 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */
626 #define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */
627 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
628 #define P_SIGEVENT 0x200000 /* Process pending signals changed. */
629 #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */
630 #define P_HWPMC 0x800000 /* Process is using HWPMCs */
631
632 #define P_JAILED 0x1000000 /* Process is in jail. */
633 #define P_INEXEC 0x4000000 /* Process is in execve(). */
634 #define P_STATCHILD 0x8000000 /* Child process stopped or exited. */
635 #define P_INMEM 0x10000000 /* Loaded into memory. */
636 #define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */
637 #define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */
638
639 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
640 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
641
642 /*
643 * These were process status values (p_stat), now they are only used in
644 * legacy conversion code.
645 */
646 #define SIDL 1 /* Process being created by fork. */
647 #define SRUN 2 /* Currently runnable. */
648 #define SSLEEP 3 /* Sleeping on an address. */
649 #define SSTOP 4 /* Process debugging or suspension. */
650 #define SZOMB 5 /* Awaiting collection by parent. */
651 #define SWAIT 6 /* Waiting for interrupt. */
652 #define SLOCK 7 /* Blocked on a lock. */
653
654 #define P_MAGIC 0xbeefface
655
656 #ifdef _KERNEL
657
658 /* Flags for mi_switch(). */
659 #define SW_VOL 0x0001 /* Voluntary switch. */
660 #define SW_INVOL 0x0002 /* Involuntary switch. */
661 #define SW_PREEMPT 0x0004 /* The invol switch is a preemption */
662
663 /* How values for thread_single(). */
664 #define SINGLE_NO_EXIT 0
665 #define SINGLE_EXIT 1
666 #define SINGLE_BOUNDARY 2
667
668 /* XXXKSE: Missing values for thread_suspend_check(). */
669
670 #ifdef MALLOC_DECLARE
671 MALLOC_DECLARE(M_PARGS);
672 MALLOC_DECLARE(M_PGRP);
673 MALLOC_DECLARE(M_SESSION);
674 MALLOC_DECLARE(M_SUBPROC);
675 MALLOC_DECLARE(M_ZOMBIE);
676 #endif
677
678 #define FOREACH_PROC_IN_SYSTEM(p) \
679 LIST_FOREACH((p), &allproc, p_list)
680 #define FOREACH_THREAD_IN_PROC(p, td) \
681 TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
682 #define FOREACH_UPCALL_IN_PROC(p, ku) \
683 TAILQ_FOREACH((ku), &(p)->p_upcalls, ku_link)
684
685 /* XXXKSE the following lines should probably only be used in 1:1 code: */
686 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads)
687
688 /*
689 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
690 * as it is used to represent "no process group".
691 */
692 #define PID_MAX 99999
693 #define NO_PID 100000
694
695 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
696 #define SESSHOLD(s) ((s)->s_count++)
697 #define SESSRELE(s) sessrele(s)
698
699
700 #define STOPEVENT(p, e, v) do { \
701 if ((p)->p_stops & (e)) { \
702 PROC_LOCK(p); \
703 stopevent((p), (e), (v)); \
704 PROC_UNLOCK(p); \
705 } \
706 } while (0)
707 #define _STOPEVENT(p, e, v) do { \
708 PROC_LOCK_ASSERT(p, MA_OWNED); \
709 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.lock_object, \
710 "checking stopevent %d", (e)); \
711 if ((p)->p_stops & (e)) \
712 stopevent((p), (e), (v)); \
713 } while (0)
714
715 /* Lock and unlock a process. */
716 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
717 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
718 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
719 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
720 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
721
722 /* Lock and unlock a process group. */
723 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
724 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
725 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
726 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
727
728 #define PGRP_LOCK_PGSIGNAL(pg) do { \
729 if ((pg) != NULL) \
730 PGRP_LOCK(pg); \
731 } while (0)
732 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \
733 if ((pg) != NULL) \
734 PGRP_UNLOCK(pg); \
735 } while (0)
736
737 /* Lock and unlock a session. */
738 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
739 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
740 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
741 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
742
743 /* Hold process U-area in memory, normally for ptrace/procfs work. */
744 #define PHOLD(p) do { \
745 PROC_LOCK(p); \
746 _PHOLD(p); \
747 PROC_UNLOCK(p); \
748 } while (0)
749 #define _PHOLD(p) do { \
750 PROC_LOCK_ASSERT((p), MA_OWNED); \
751 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \
752 ("PHOLD of exiting process")); \
753 (p)->p_lock++; \
754 if (((p)->p_flag & P_INMEM) == 0) \
755 faultin((p)); \
756 } while (0)
757 #define PROC_ASSERT_HELD(p) do { \
758 KASSERT((p)->p_lock > 0, ("process not held")); \
759 } while (0)
760
761 #define PRELE(p) do { \
762 PROC_LOCK((p)); \
763 _PRELE((p)); \
764 PROC_UNLOCK((p)); \
765 } while (0)
766 #define _PRELE(p) do { \
767 PROC_LOCK_ASSERT((p), MA_OWNED); \
768 (--(p)->p_lock); \
769 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \
770 wakeup(&(p)->p_lock); \
771 } while (0)
772 #define PROC_ASSERT_NOT_HELD(p) do { \
773 KASSERT((p)->p_lock == 0, ("process held")); \
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 /* Control whether or not it is safe for curthread to sleep. */
780 #define THREAD_NO_SLEEPING() do { \
781 KASSERT(!(curthread->td_pflags & TDP_NOSLEEPING), \
782 ("nested no sleeping")); \
783 curthread->td_pflags |= TDP_NOSLEEPING; \
784 } while (0)
785
786 #define THREAD_SLEEPING_OK() do { \
787 KASSERT((curthread->td_pflags & TDP_NOSLEEPING), \
788 ("nested sleeping ok")); \
789 curthread->td_pflags &= ~TDP_NOSLEEPING; \
790 } while (0)
791
792 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
793 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
794 extern u_long pidhash;
795
796 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
797 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
798 extern u_long pgrphash;
799
800 extern struct sx allproc_lock;
801 extern struct sx proctree_lock;
802 extern struct mtx ppeers_lock;
803 extern struct proc proc0; /* Process slot for swapper. */
804 extern struct thread thread0; /* Primary thread in proc0. */
805 extern struct vmspace vmspace0; /* VM space for proc0. */
806 extern int hogticks; /* Limit on kernel cpu hogs. */
807 extern int lastpid;
808 extern int nprocs, maxproc; /* Current and max number of procs. */
809 extern int maxprocperuid; /* Max procs per uid. */
810 extern u_long ps_arg_cache_limit;
811
812 LIST_HEAD(proclist, proc);
813 TAILQ_HEAD(procqueue, proc);
814 TAILQ_HEAD(threadqueue, thread);
815 extern struct proclist allproc; /* List of all processes. */
816 extern struct proclist zombproc; /* List of zombie processes. */
817 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
818
819 extern struct uma_zone *proc_zone;
820
821 struct proc *pfind(pid_t); /* Find process by id. */
822 struct pgrp *pgfind(pid_t); /* Find process group by id. */
823 struct proc *zpfind(pid_t); /* Find zombie process by id. */
824
825 void ast(struct trapframe *framep);
826 struct thread *choosethread(void);
827 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
828 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp,
829 struct session *sess);
830 int enterthispgrp(struct proc *p, struct pgrp *pgrp);
831 void faultin(struct proc *p);
832 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
833 int fork1(struct thread *, int, int, struct proc **);
834 void fork_exit(void (*)(void *, struct trapframe *), void *,
835 struct trapframe *);
836 void fork_return(struct thread *, struct trapframe *);
837 int inferior(struct proc *p);
838 void kick_proc0(void);
839 int leavepgrp(struct proc *p);
840 int maybe_preempt(struct thread *td);
841 void mi_switch(int flags, struct thread *newtd);
842 int p_candebug(struct thread *td, struct proc *p);
843 int p_cansee(struct thread *td, struct proc *p);
844 int p_cansched(struct thread *td, struct proc *p);
845 int p_cansignal(struct thread *td, struct proc *p, int signum);
846 int p_canwait(struct thread *td, struct proc *p);
847 struct pargs *pargs_alloc(int len);
848 void pargs_drop(struct pargs *pa);
849 void pargs_hold(struct pargs *pa);
850 void procinit(void);
851 void proc_linkup0(struct proc *p, struct thread *td);
852 void proc_linkup(struct proc *p, struct thread *td);
853 void proc_reparent(struct proc *child, struct proc *newparent);
854 struct pstats *pstats_alloc(void);
855 void pstats_fork(struct pstats *src, struct pstats *dst);
856 void pstats_free(struct pstats *ps);
857 int securelevel_ge(struct ucred *cr, int level);
858 int securelevel_gt(struct ucred *cr, int level);
859 void sessrele(struct session *);
860 int setrunnable(struct thread *);
861 void setsugid(struct proc *p);
862 int sigonstack(size_t sp);
863 void sleepinit(void);
864 void stopevent(struct proc *, u_int, u_int);
865 void threadinit(void);
866 void cpu_idle(void);
867 extern void (*cpu_idle_hook)(void); /* Hook to machdep CPU idler. */
868 void cpu_switch(struct thread *, struct thread *, struct mtx *);
869 void cpu_throw(struct thread *, struct thread *) __dead2;
870 void unsleep(struct thread *);
871 void userret(struct thread *, struct trapframe *);
872
873 void cpu_exit(struct thread *);
874 void exit1(struct thread *, int) __dead2;
875 void cpu_fork(struct thread *, struct proc *, struct thread *, int);
876 void cpu_set_fork_handler(struct thread *, void (*)(void *), void *);
877
878 /* New in KSE. */
879 #ifdef KSE
880 void kse_unlink(struct thread *);
881 void kseinit(void);
882 void upcall_reap(void);
883 void upcall_remove(struct thread *td);
884 #endif
885 void cpu_set_upcall(struct thread *td, struct thread *td0);
886 void cpu_set_upcall_kse(struct thread *, void (*)(void *), void *, stack_t *);
887 int cpu_set_user_tls(struct thread *, void *tls_base);
888 void cpu_thread_alloc(struct thread *);
889 void cpu_thread_clean(struct thread *);
890 void cpu_thread_exit(struct thread *);
891 void cpu_thread_free(struct thread *);
892 void cpu_thread_swapin(struct thread *);
893 void cpu_thread_swapout(struct thread *);
894 struct thread *thread_alloc(void);
895 void thread_continued(struct proc *p);
896 void thread_exit(void) __dead2;
897 int thread_export_context(struct thread *td, int willexit);
898 void thread_free(struct thread *td);
899 void thread_link(struct thread *td, struct proc *p);
900 void thread_reap(void);
901 void thread_signal_add(struct thread *td, ksiginfo_t *);
902 int thread_single(int how);
903 void thread_single_end(void);
904 void thread_stash(struct thread *td);
905 int thread_statclock(int user);
906 void thread_stopped(struct proc *p);
907 void childproc_stopped(struct proc *child, int reason);
908 void childproc_continued(struct proc *child);
909 void childproc_exited(struct proc *child);
910 int thread_suspend_check(int how);
911 void thread_suspend_switch(struct thread *);
912 void thread_suspend_one(struct thread *td);
913 struct thread *thread_switchout(struct thread *td, int flags,
914 struct thread *newtd);
915 void thread_unlink(struct thread *td);
916 void thread_unsuspend(struct proc *p);
917 int thread_unsuspend_one(struct thread *td);
918 void thread_unthread(struct thread *td);
919 int thread_userret(struct thread *td, struct trapframe *frame);
920 void thread_user_enter(struct thread *td);
921 void thread_wait(struct proc *p);
922 struct thread *thread_find(struct proc *p, lwpid_t tid);
923 void thr_exit1(void);
924
925 #endif /* _KERNEL */
926
927 #endif /* !_SYS_PROC_H_ */
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