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/6.2/sys/sys/proc.h 164286 2006-11-14 20:42:41Z cvs2svn $
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) Process group id. */
96 int pg_jobc; /* (m) Job control process 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 * k*- only accessed by curthread and from an interrupt
138 * l - the attaching proc or attaching proc parent
139 * m - Giant
140 * n - not locked, lazy
141 * o - ktrace lock
142 * p - select lock (sellock)
143 * q - td_contested lock
144 * r - p_peers lock
145 * x - created at fork, only changes during single threading in exec
146 * z - zombie threads/ksegroup lock
147 *
148 * If the locking key specifies two identifiers (for example, p_pptr) then
149 * either lock is sufficient for read access, but both locks must be held
150 * for write access.
151 */
152 struct auditinfo;
153 struct kaudit_record;
154 struct kg_sched;
155 struct nlminfo;
156 struct kaioinfo;
157 struct p_sched;
158 struct sleepqueue;
159 struct td_sched;
160 struct trapframe;
161 struct turnstile;
162
163 /*
164 * Here we define the three structures used for process information.
165 *
166 * The first is the thread. It might be thought of as a "Kernel
167 * Schedulable Entity Context".
168 * This structure contains all the information as to where a thread of
169 * execution is now, or was when it was suspended, why it was suspended,
170 * and anything else that will be needed to restart it when it is
171 * rescheduled. Always associated with a KSE when running, but can be
172 * reassigned to an equivalent KSE when being restarted for
173 * load balancing. Each of these is associated with a kernel stack
174 * and a pcb.
175 *
176 * It is important to remember that a particular thread structure may only
177 * exist as long as the system call or kernel entrance (e.g. by pagefault)
178 * which it is currently executing. It should therefore NEVER be referenced
179 * by pointers in long lived structures that live longer than a single
180 * request. If several threads complete their work at the same time,
181 * they will all rewind their stacks to the user boundary, report their
182 * completion state, and all but one will be freed. That last one will
183 * be kept to provide a kernel stack and pcb for the NEXT syscall or kernel
184 * entrance (basically to save freeing and then re-allocating it). The existing
185 * thread keeps a cached spare thread available to allow it to quickly
186 * get one when it needs a new one. There is also a system
187 * cache of free threads. Threads have priority and partake in priority
188 * inheritance schemes.
189 */
190 struct thread;
191
192 /*
193 * The KSEGRP is allocated resources across a number of CPUs.
194 * (Including a number of CPUxQUANTA. It parcels these QUANTA up among
195 * its threads, each of which should be running in a different CPU.
196 * BASE priority and total available quanta are properties of a KSEGRP.
197 * Multiple KSEGRPs in a single process compete against each other
198 * for total quanta in the same way that a forked child competes against
199 * it's parent process.
200 */
201 struct ksegrp;
202
203 /*
204 * A process is the owner of all system resources allocated to a task
205 * except CPU quanta.
206 * All KSEGs under one process see, and have the same access to, these
207 * resources (e.g. files, memory, sockets, credential, kqueues).
208 * A process may compete for CPU cycles on the same basis as a
209 * forked process cluster by spawning several KSEGRPs.
210 */
211 struct proc;
212
213 /***************
214 * In pictures:
215 With a single run queue used by all processors:
216
217 RUNQ: --->KSE---KSE--... SLEEPQ:[]---THREAD---THREAD---THREAD
218 \ \ []---THREAD
219 KSEG---THREAD--THREAD--THREAD []
220 []---THREAD---THREAD
221
222 (processors run THREADs from the KSEG until they are exhausted or
223 the KSEG exhausts its quantum)
224
225 With PER-CPU run queues:
226 KSEs on the separate run queues directly
227 They would be given priorities calculated from the KSEG.
228
229 *
230 *****************/
231
232 /*
233 * Kernel runnable context (thread).
234 * This is what is put to sleep and reactivated.
235 * The first KSE available in the correct group will run this thread.
236 * If several are available, use the one on the same CPU as last time.
237 * When waiting to be run, threads are hung off the KSEGRP in priority order.
238 * With N runnable and queued KSEs in the KSEGRP, the first N threads
239 * are linked to them. Other threads are not yet assigned.
240 */
241 struct thread {
242 struct proc *td_proc; /* (*) Associated process. */
243 struct ksegrp *td_ksegrp; /* (*) Associated KSEG. */
244 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */
245 TAILQ_ENTRY(thread) td_kglist; /* (*) All threads in this ksegrp. */
246
247 /* The two queues below should someday be merged. */
248 TAILQ_ENTRY(thread) td_slpq; /* (j) Sleep queue. */
249 TAILQ_ENTRY(thread) td_lockq; /* (j) Lock queue. */
250 TAILQ_ENTRY(thread) td_runq; /* (j/z) Run queue(s). XXXKSE */
251
252 TAILQ_HEAD(, selinfo) td_selq; /* (p) List of selinfos. */
253 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */
254 struct turnstile *td_turnstile; /* (k) Associated turnstile. */
255 struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */
256 lwpid_t td_tid; /* (b) Thread ID. */
257
258 /* Cleared during fork1() or thread_schedule_upcall(). */
259 #define td_startzero td_flags
260 int td_flags; /* (j) TDF_* flags. */
261 int td_inhibitors; /* (j) Why can not run. */
262 int td_pflags; /* (k) Private thread (TDP_*) flags. */
263 int td_dupfd; /* (k) Ret value from fdopen. XXX */
264 void *td_wchan; /* (j) Sleep address. */
265 const char *td_wmesg; /* (j) Reason for sleep. */
266 u_char td_lastcpu; /* (j) Last cpu we were on. */
267 u_char td_oncpu; /* (j) Which cpu we are on. */
268 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */
269 short td_locks; /* (k) Count of non-spin locks. */
270 struct turnstile *td_blocked; /* (j) Lock process is blocked on. */
271 void *td_ithd; /* (n) Unused, kept to preserve ABI. */
272 const char *td_lockname; /* (j) Name of lock blocked on. */
273 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */
274 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
275 int td_intr_nesting_level; /* (k) Interrupt recursion. */
276 int td_pinned; /* (k) Temporary cpu pin count. */
277 struct kse_thr_mailbox *td_mailbox; /* (*) Userland mailbox address. */
278 struct ucred *td_ucred; /* (k) Reference to credentials. */
279 struct thread *td_standin; /* (k + a) Use this for an upcall. */
280 struct kse_upcall *td_upcall; /* (k + j) Upcall structure. */
281 u_int64_t td_sticks; /* (k) Statclock hits in system mode. */
282 u_int td_uuticks; /* (k) Statclock hits (usr), for UTS. */
283 u_int td_usticks; /* (k) Statclock hits (sys), for UTS. */
284 int td_intrval; /* (j) Return value of TDF_INTERRUPT. */
285 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */
286 sigset_t td_sigmask; /* (c) Current signal mask. */
287 sigset_t td_siglist; /* (c) Sigs arrived, not delivered. */
288 volatile u_int td_generation; /* (k) For detection of preemption */
289 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */
290 int td_kflags; /* (c) Flags for KSE threading. */
291 int td_xsig; /* (c) Signal for ptrace */
292 u_long td_profil_addr; /* (k) Temporary addr until AST. */
293 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */
294 #define td_endzero td_base_pri
295
296 /* Copied during fork1() or thread_sched_upcall(). */
297 #define td_startcopy td_endzero
298 u_char td_base_pri; /* (j) Thread base kernel priority. */
299 u_char td_priority; /* (j) Thread active priority. */
300 #define td_endcopy td_pcb
301
302 /*
303 * Fields that must be manually set in fork1() or thread_sched_upcall()
304 * or already have been set in the allocator, constructor, etc.
305 */
306 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
307 enum {
308 TDS_INACTIVE = 0x0,
309 TDS_INHIBITED,
310 TDS_CAN_RUN,
311 TDS_RUNQ,
312 TDS_RUNNING
313 } td_state;
314 register_t td_retval[2]; /* (k) Syscall aux returns. */
315 struct callout td_slpcallout; /* (h) Callout for sleep. */
316 struct trapframe *td_frame; /* (k) */
317 struct vm_object *td_kstack_obj;/* (a) Kstack object. */
318 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
319 int td_kstack_pages; /* (a) Size of the kstack. */
320 struct vm_object *td_altkstack_obj;/* (a) Alternate kstack object. */
321 vm_offset_t td_altkstack; /* (a) Kernel VA of alternate kstack. */
322 int td_altkstack_pages; /* (a) Size of alternate kstack. */
323 volatile u_int td_critnest; /* (k*) Critical section nest level. */
324 struct mdthread td_md; /* (k) Any machine-dependent fields. */
325 struct td_sched *td_sched; /* (*) Scheduler-specific data. */
326 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */
327 };
328
329 /*
330 * Flags kept in td_flags:
331 * To change these you MUST have the scheduler lock.
332 */
333 #define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */
334 #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */
335 #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */
336 #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */
337 #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */
338 #define TDF_SELECT 0x00000040 /* Selecting; wakeup/waiting danger. */
339 #define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */
340 #define TDF_TSNOBLOCK 0x00000100 /* Don't block on a turnstile due to race. */
341 #define TDF_UNUSED9 0x00000200 /* --available -- */
342 #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */
343 #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */
344 #define TDF_TIMOFAIL 0x00001000 /* Timeout from sleep after we were awake. */
345 #define TDF_INTERRUPT 0x00002000 /* Thread is marked as interrupted. */
346 #define TDF_UNUSED14 0x00004000 /* --available -- */
347 #define TDF_UNUSED15 0x00008000 /* --available -- */
348 #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */
349 #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */
350 #define TDF_XSIG 0x00040000 /* Thread is exchanging signal under trace */
351 #define TDF_UMTXQ 0x00080000 /* Thread is sleeping on a umtx. */
352 #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */
353 #define TDF_DBSUSPEND 0x00200000 /* Thread is suspended by debugger */
354 #define TDF_UNUSED22 0x00400000 /* --available -- */
355 #define TDF_UNUSED23 0x00800000 /* --available -- */
356 #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */
357 #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */
358 #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */
359 #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */
360
361 /*
362 * "Private" flags kept in td_pflags:
363 * These are only accessed by curthread and thus need no locking.
364 */
365 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */
366 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */
367 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */
368 #define TDP_UPCALLING 0x00000008 /* This thread is doing an upcall. */
369 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */
370 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */
371 #define TDP_DEADLKTREAT 0x00000040 /* Lock aquisition - deadlock treatment. */
372 #define TDP_SA 0x00000080 /* A scheduler activation based thread. */
373 #define TDP_NOSLEEPING 0x00000100 /* Thread is not allowed to sleep on a sq. */
374 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */
375 #define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */
376 #define TDP_CAN_UNBIND 0x00000800 /* Only temporarily bound. */
377 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */
378 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */
379 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */
380 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */
381 #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */
382 #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */
383 #define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */
384
385 /*
386 * Reasons that the current thread can not be run yet.
387 * More than one may apply.
388 */
389 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */
390 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
391 #define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */
392 #define TDI_LOCK 0x0008 /* Stopped on a lock. */
393 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
394
395 /*
396 * flags (in kflags) related to M:N threading.
397 */
398 #define TDK_KSEREL 0x0001 /* Blocked in msleep on kg->kg_completed. */
399 #define TDK_KSERELSIG 0x0002 /* Blocked in msleep on p->p_siglist. */
400 #define TDK_WAKEUP 0x0004 /* Thread has been woken by kse_wakeup. */
401
402 #define TD_CAN_UNBIND(td) \
403 (((td)->td_pflags & TDP_CAN_UNBIND) && \
404 ((td)->td_upcall != NULL))
405
406 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
407 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
408 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
409 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
410 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
411 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
412 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
413 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
414 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
415 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
416
417 #define TD_SET_INHIB(td, inhib) do { \
418 (td)->td_state = TDS_INHIBITED; \
419 (td)->td_inhibitors |= (inhib); \
420 } while (0)
421
422 #define TD_CLR_INHIB(td, inhib) do { \
423 if (((td)->td_inhibitors & (inhib)) && \
424 (((td)->td_inhibitors &= ~(inhib)) == 0)) \
425 (td)->td_state = TDS_CAN_RUN; \
426 } while (0)
427
428 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
429 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
430 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
431 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
432 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
433 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
434
435 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
436 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
437 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
438 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
439 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
440
441 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING
442 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ
443 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN
444
445 /*
446 * An upcall is used when returning to userland. If a thread does not have
447 * an upcall on return to userland the thread exports its context and exits.
448 */
449 struct kse_upcall {
450 TAILQ_ENTRY(kse_upcall) ku_link; /* List of upcalls in KSEG. */
451 struct ksegrp *ku_ksegrp; /* Associated KSEG. */
452 struct thread *ku_owner; /* Owning thread. */
453 int ku_flags; /* KUF_* flags. */
454 struct kse_mailbox *ku_mailbox; /* Userland mailbox address. */
455 stack_t ku_stack; /* Userland upcall stack. */
456 void *ku_func; /* Userland upcall function. */
457 unsigned int ku_mflags; /* Cached upcall mbox flags. */
458 };
459
460 #define KUF_DOUPCALL 0x00001 /* Do upcall now; don't wait. */
461 #define KUF_EXITING 0x00002 /* Upcall structure is exiting. */
462
463 /*
464 * Kernel-scheduled entity group (KSEG). The scheduler considers each KSEG to
465 * be an indivisible unit from a time-sharing perspective, though each KSEG may
466 * contain multiple KSEs.
467 */
468 struct ksegrp {
469 struct proc *kg_proc; /* (*) Proc that contains this KSEG. */
470 TAILQ_ENTRY(ksegrp) kg_ksegrp; /* (*) Queue of KSEGs in kg_proc. */
471 TAILQ_HEAD(, thread) kg_threads;/* (td_kglist) All threads. */
472 TAILQ_HEAD(, thread) kg_runq; /* (td_runq) waiting RUNNABLE threads */
473 TAILQ_HEAD(, kse_upcall) kg_upcalls; /* All upcalls in the group. */
474
475 #define kg_startzero kg_estcpu
476 u_int kg_estcpu; /* (j) Sum of the same field in KSEs. */
477 u_int kg_slptime; /* (j) How long completely blocked. */
478 int kg_numupcalls; /* (j) Num upcalls. */
479 int kg_upsleeps; /* (c) Num threads in kse_release(). */
480 struct kse_thr_mailbox *kg_completed; /* (c) Completed thread mboxes. */
481 int kg_nextupcall; /* (n) Next upcall time. */
482 int kg_upquantum; /* (n) Quantum to schedule an upcall. */
483 #define kg_endzero kg_pri_class
484
485 #define kg_startcopy kg_endzero
486 u_char kg_pri_class; /* (j) Scheduling class. */
487 u_char kg_user_pri; /* (j) User pri from estcpu and nice. */
488 #define kg_endcopy kg_numthreads
489 int kg_numthreads; /* (j) Num threads in total. */
490 struct kg_sched *kg_sched; /* (*) Scheduler-specific data. */
491 };
492
493 /*
494 * XXX: Does this belong in resource.h or resourcevar.h instead?
495 * Resource usage extension. The times in rusage structs in the kernel are
496 * never up to date. The actual times are kept as runtimes and tick counts
497 * (with control info in the "previous" times), and are converted when
498 * userland asks for rusage info. Backwards compatibility prevents putting
499 * this directly in the user-visible rusage struct.
500 *
501 * Locking: (cj) means (j) for p_rux and (c) for p_crux.
502 */
503 struct rusage_ext {
504 struct bintime rux_runtime; /* (cj) Real time. */
505 u_int64_t rux_uticks; /* (cj) Statclock hits in user mode. */
506 u_int64_t rux_sticks; /* (cj) Statclock hits in sys mode. */
507 u_int64_t rux_iticks; /* (cj) Statclock hits in intr mode. */
508 u_int64_t rux_uu; /* (c) Previous user time in usec. */
509 u_int64_t rux_su; /* (c) Previous sys time in usec. */
510 u_int64_t rux_iu; /* (c) Previous intr time in usec. */
511 };
512
513 /*
514 * The old fashionned process. May have multiple threads, KSEGRPs
515 * and KSEs. Starts off with a single embedded KSEGRP and THREAD.
516 */
517 struct proc {
518 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
519 TAILQ_HEAD(, ksegrp) p_ksegrps; /* (c)(kg_ksegrp) All KSEGs. */
520 TAILQ_HEAD(, thread) p_threads; /* (j)(td_plist) Threads. (shortcut) */
521 TAILQ_HEAD(, thread) p_suspended; /* (td_runq) Suspended threads. */
522 struct ucred *p_ucred; /* (c) Process owner's identity. */
523 struct filedesc *p_fd; /* (b) Open files. */
524 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */
525 /* Accumulated stats for all threads? */
526 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
527 struct plimit *p_limit; /* (c) Process limits. */
528 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */
529
530 /*
531 * The following don't make too much sense.
532 * See the td_ or ke_ versions of the same flags.
533 */
534 int p_flag; /* (c) P_* flags. */
535 int p_sflag; /* (j) PS_* flags. */
536 enum {
537 PRS_NEW = 0, /* In creation */
538 PRS_NORMAL, /* threads can be run. */
539 PRS_ZOMBIE
540 } p_state; /* (j/c) S* process status. */
541
542 pid_t p_pid; /* (b) Process identifier. */
543 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
544 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
545 struct proc *p_pptr; /* (c + e) Pointer to parent process. */
546 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
547 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
548 struct mtx p_mtx; /* (n) Lock for this struct. */
549
550 /* The following fields are all zeroed upon creation in fork. */
551 #define p_startzero p_oppid
552 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */
553 struct vmspace *p_vmspace; /* (b) Address space. */
554 u_int p_swtime; /* (j) Time swapped in or out. */
555 struct itimerval p_realtimer; /* (c) Alarm timer. */
556 struct rusage_ext p_rux; /* (cj) Internal resource usage. */
557 struct rusage_ext p_crux; /* (c) Internal child resource usage. */
558 int p_profthreads; /* (c) Num threads in addupc_task. */
559 int p_maxthrwaits; /* (c) Max threads num waiters */
560 int p_traceflag; /* (o) Kernel trace points. */
561 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */
562 struct ucred *p_tracecred; /* (o) Credentials to trace with. */
563 struct vnode *p_textvp; /* (b) Vnode of executable. */
564 sigset_t p_siglist; /* (c) Sigs not delivered to a td. */
565 char p_lock; /* (c) Proclock (prevent swap) count. */
566 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
567 int p_sigparent; /* (c) Signal to parent on exit. */
568 int p_sig; /* (n) For core dump/debugger XXX. */
569 u_long p_code; /* (n) For core dump/debugger XXX. */
570 u_int p_stops; /* (c) Stop event bitmask. */
571 u_int p_stype; /* (c) Stop event type. */
572 char p_step; /* (c) Process is stopped. */
573 u_char p_pfsflags; /* (c) Procfs flags. */
574 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
575 struct kaioinfo *p_aioinfo; /* (c) ASYNC I/O info. */
576 struct thread *p_singlethread;/* (c + j) If single threading this is it */
577 int p_suspcount; /* (c) Num threads in suspended mode. */
578 struct thread *p_xthread; /* (c) Trap thread */
579 int p_boundary_count;/* (c) Num threads at user boundary */
580 struct ksegrp *p_procscopegrp;
581 /* End area that is zeroed on creation. */
582 #define p_endzero p_magic
583
584 /* The following fields are all copied upon creation in fork. */
585 #define p_startcopy p_endzero
586 u_int p_magic; /* (b) Magic number. */
587 char p_comm[MAXCOMLEN + 1]; /* (b) Process name. */
588 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
589 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
590 struct pargs *p_args; /* (c) Process arguments. */
591 rlim_t p_cpulimit; /* (j) Current CPU limit in seconds. */
592 signed char p_nice; /* (c + j) Process "nice" value. */
593 /* End area that is copied on creation. */
594 #define p_endcopy p_xstat
595
596 u_short p_xstat; /* (c) Exit status; also stop sig. */
597 struct knlist p_klist; /* (c) Knotes attached to this proc. */
598 int p_numthreads; /* (j) Number of threads. */
599 int p_numksegrps; /* (c) Number of ksegrps. */
600 struct mdproc p_md; /* Any machine-dependent fields. */
601 struct callout p_itcallout; /* (h + c) Interval timer callout. */
602 u_short p_acflag; /* (c) Accounting flags. */
603 struct rusage *p_ru; /* (a) Exit information. XXX */
604 struct proc *p_peers; /* (r) */
605 struct proc *p_leader; /* (b) */
606 void *p_emuldata; /* (c) Emulator state data. */
607 struct label *p_label; /* (*) Proc (not subject) MAC label. */
608 struct p_sched *p_sched; /* (*) Scheduler-specific data. */
609 struct auditinfo *p_au; /* (c) Process audit properties. */
610 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */
611 };
612
613 #define p_session p_pgrp->pg_session
614 #define p_pgid p_pgrp->pg_id
615
616 #define NOCPU 0xff /* For when we aren't on a CPU. */
617
618
619 /* These flags are kept in p_flag. */
620 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
621 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
622 #define P_KTHREAD 0x00004 /* Kernel thread (*). */
623 #define P_NOLOAD 0x00008 /* Ignore during load avg calculations. */
624 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
625 #define P_PROFIL 0x00020 /* Has started profiling. */
626 #define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */
627 #define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */
628 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
629 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
630 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */
631 #define P_TRACED 0x00800 /* Debugged process being traced. */
632 #define P_WAITED 0x01000 /* Someone is waiting for us. */
633 #define P_WEXIT 0x02000 /* Working on exiting. */
634 #define P_EXEC 0x04000 /* Process called exec. */
635 #define P_SA 0x08000 /* Using scheduler activations. */
636 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
637 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */
638 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */
639 #define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */
640 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
641 #define P_SIGEVENT 0x200000 /* Process pending signals changed. */
642 #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */
643 #define P_HWPMC 0x800000 /* Process is using HWPMCs */
644
645 #define P_JAILED 0x1000000 /* Process is in jail. */
646 #define P_INEXEC 0x4000000 /* Process is in execve(). */
647 #define P_STATCHILD 0x8000000 /* Child process stopped or exited. */
648
649 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
650 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
651
652 /* These flags are kept in p_sflag and are protected with sched_lock. */
653 #define PS_INMEM 0x00001 /* Loaded into memory. */
654 #define PS_XCPU 0x00002 /* Exceeded CPU limit. */
655 #define PS_ALRMPEND 0x00020 /* Pending SIGVTALRM needs to be posted. */
656 #define PS_PROFPEND 0x00040 /* Pending SIGPROF needs to be posted. */
657 #define PS_SWAPINREQ 0x00100 /* Swapin request due to wakeup. */
658 #define PS_SWAPPINGOUT 0x00200 /* Process is being swapped out. */
659 #define PS_SWAPPINGIN 0x04000 /* Process is being swapped in. */
660 #define PS_MACPEND 0x08000 /* AST-based MAC event pending. */
661
662 /*
663 * These were process status values (p_stat), now they are only used in
664 * legacy conversion code.
665 */
666 #define SIDL 1 /* Process being created by fork. */
667 #define SRUN 2 /* Currently runnable. */
668 #define SSLEEP 3 /* Sleeping on an address. */
669 #define SSTOP 4 /* Process debugging or suspension. */
670 #define SZOMB 5 /* Awaiting collection by parent. */
671 #define SWAIT 6 /* Waiting for interrupt. */
672 #define SLOCK 7 /* Blocked on a lock. */
673
674 #define P_MAGIC 0xbeefface
675
676 #ifdef _KERNEL
677
678 /* Flags for mi_switch(). */
679 #define SW_VOL 0x0001 /* Voluntary switch. */
680 #define SW_INVOL 0x0002 /* Involuntary switch. */
681 #define SW_PREEMPT 0x0004 /* The invol switch is a preemption */
682
683 /* Flags for setrunqueue(). Why are we setting this thread on the run queue? */
684 #define SRQ_BORING 0x0000 /* No special circumstances. */
685 #define SRQ_YIELDING 0x0001 /* We are yielding (from mi_switch). */
686 #define SRQ_OURSELF 0x0002 /* It is ourself (from mi_switch). */
687 #define SRQ_INTR 0x0004 /* It is probably urgent. */
688 #define SRQ_PREEMPTED 0x0008 /* has been preempted.. be kind */
689
690 /* How values for thread_single(). */
691 #define SINGLE_NO_EXIT 0
692 #define SINGLE_EXIT 1
693 #define SINGLE_BOUNDARY 2
694
695 /* XXXKSE: Missing values for thread_suspsend_check(). */
696
697 #ifdef MALLOC_DECLARE
698 MALLOC_DECLARE(M_PARGS);
699 MALLOC_DECLARE(M_PGRP);
700 MALLOC_DECLARE(M_SESSION);
701 MALLOC_DECLARE(M_SUBPROC);
702 MALLOC_DECLARE(M_ZOMBIE);
703 #endif
704
705 #define FOREACH_PROC_IN_SYSTEM(p) \
706 LIST_FOREACH((p), &allproc, p_list)
707 #define FOREACH_KSEGRP_IN_PROC(p, kg) \
708 TAILQ_FOREACH((kg), &(p)->p_ksegrps, kg_ksegrp)
709 #define FOREACH_THREAD_IN_GROUP(kg, td) \
710 TAILQ_FOREACH((td), &(kg)->kg_threads, td_kglist)
711 #define FOREACH_UPCALL_IN_GROUP(kg, ku) \
712 TAILQ_FOREACH((ku), &(kg)->kg_upcalls, ku_link)
713 #define FOREACH_THREAD_IN_PROC(p, td) \
714 TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
715
716 /* XXXKSE the following lines should probably only be used in 1:1 code: */
717 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads)
718 #define FIRST_KSEGRP_IN_PROC(p) TAILQ_FIRST(&(p)->p_ksegrps)
719
720 /*
721 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
722 * as it is used to represent "no process group".
723 */
724 #define PID_MAX 99999
725 #define NO_PID 100000
726
727 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
728 #define SESSHOLD(s) ((s)->s_count++)
729 #define SESSRELE(s) sessrele(s)
730
731
732 #define STOPEVENT(p, e, v) do { \
733 if ((p)->p_stops & (e)) { \
734 PROC_LOCK(p); \
735 stopevent((p), (e), (v)); \
736 PROC_UNLOCK(p); \
737 } \
738 } while (0)
739 #define _STOPEVENT(p, e, v) do { \
740 PROC_LOCK_ASSERT(p, MA_OWNED); \
741 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.mtx_object, \
742 "checking stopevent %d", (e)); \
743 if ((p)->p_stops & (e)) \
744 stopevent((p), (e), (v)); \
745 } while (0)
746
747 /* Lock and unlock a process. */
748 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
749 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
750 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
751 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
752 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
753
754 /* Lock and unlock a process group. */
755 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
756 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
757 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
758 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
759
760 #define PGRP_LOCK_PGSIGNAL(pg) do { \
761 if ((pg) != NULL) \
762 PGRP_LOCK(pg); \
763 } while (0)
764 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \
765 if ((pg) != NULL) \
766 PGRP_UNLOCK(pg); \
767 } while (0)
768
769 /* Lock and unlock a session. */
770 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
771 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
772 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
773 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
774
775 /* Hold process U-area in memory, normally for ptrace/procfs work. */
776 #define PHOLD(p) do { \
777 PROC_LOCK(p); \
778 _PHOLD(p); \
779 PROC_UNLOCK(p); \
780 } while (0)
781 #define _PHOLD(p) do { \
782 PROC_LOCK_ASSERT((p), MA_OWNED); \
783 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \
784 ("PHOLD of exiting process")); \
785 (p)->p_lock++; \
786 if (((p)->p_sflag & PS_INMEM) == 0) \
787 faultin((p)); \
788 } while (0)
789
790 #define PRELE(p) do { \
791 PROC_LOCK((p)); \
792 _PRELE((p)); \
793 PROC_UNLOCK((p)); \
794 } while (0)
795 #define _PRELE(p) do { \
796 PROC_LOCK_ASSERT((p), MA_OWNED); \
797 (--(p)->p_lock); \
798 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \
799 wakeup(&(p)->p_lock); \
800 } while (0)
801
802 /* Check whether a thread is safe to be swapped out. */
803 #define thread_safetoswapout(td) (TD_IS_SLEEPING(td) || TD_IS_SUSPENDED(td))
804
805 /* Control whether or not it is safe for curthread to sleep. */
806 #define THREAD_NO_SLEEPING() do { \
807 KASSERT(!(curthread->td_pflags & TDP_NOSLEEPING), \
808 ("nested no sleeping")); \
809 curthread->td_pflags |= TDP_NOSLEEPING; \
810 } while (0)
811
812 #define THREAD_SLEEPING_OK() do { \
813 KASSERT((curthread->td_pflags & TDP_NOSLEEPING), \
814 ("nested sleeping ok")); \
815 curthread->td_pflags &= ~TDP_NOSLEEPING; \
816 } while (0)
817
818 /* Lock and unlock process arguments. */
819 #define PARGS_LOCK(p) mtx_lock(&pargs_ref_lock)
820 #define PARGS_UNLOCK(p) mtx_unlock(&pargs_ref_lock)
821
822 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
823 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
824 extern u_long pidhash;
825
826 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
827 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
828 extern u_long pgrphash;
829
830 extern struct sx allproc_lock;
831 extern struct sx proctree_lock;
832 extern struct mtx pargs_ref_lock;
833 extern struct mtx ppeers_lock;
834 extern struct ksegrp ksegrp0; /* Primary ksegrp in proc0. */
835 extern struct proc proc0; /* Process slot for swapper. */
836 extern struct thread thread0; /* Primary thread in proc0. */
837 extern struct vmspace vmspace0; /* VM space for proc0. */
838 extern int hogticks; /* Limit on kernel cpu hogs. */
839 extern int lastpid;
840 extern int nprocs, maxproc; /* Current and max number of procs. */
841 extern int maxprocperuid; /* Max procs per uid. */
842 extern u_long ps_arg_cache_limit;
843 extern int sched_quantum; /* Scheduling quantum in ticks. */
844
845 LIST_HEAD(proclist, proc);
846 TAILQ_HEAD(procqueue, proc);
847 TAILQ_HEAD(threadqueue, thread);
848 extern struct proclist allproc; /* List of all processes. */
849 extern struct proclist zombproc; /* List of zombie processes. */
850 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
851
852 extern struct uma_zone *proc_zone;
853
854 struct proc *pfind(pid_t); /* Find process by id. */
855 struct pgrp *pgfind(pid_t); /* Find process group by id. */
856 struct proc *zpfind(pid_t); /* Find zombie process by id. */
857
858 void adjustrunqueue(struct thread *, int newpri);
859 void ast(struct trapframe *framep);
860 struct thread *choosethread(void);
861 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
862 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp,
863 struct session *sess);
864 int enterthispgrp(struct proc *p, struct pgrp *pgrp);
865 void faultin(struct proc *p);
866 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
867 int fork1(struct thread *, int, int, struct proc **);
868 void fork_exit(void (*)(void *, struct trapframe *), void *,
869 struct trapframe *);
870 void fork_return(struct thread *, struct trapframe *);
871 int inferior(struct proc *p);
872 void kick_proc0(void);
873 int leavepgrp(struct proc *p);
874 int maybe_preempt(struct thread *td);
875 void mi_switch(int flags, struct thread *newtd);
876 int p_candebug(struct thread *td, struct proc *p);
877 int p_cansee(struct thread *td, struct proc *p);
878 int p_cansched(struct thread *td, struct proc *p);
879 int p_cansignal(struct thread *td, struct proc *p, int signum);
880 int p_canwait(struct thread *td, struct proc *p);
881 struct pargs *pargs_alloc(int len);
882 void pargs_drop(struct pargs *pa);
883 void pargs_free(struct pargs *pa);
884 void pargs_hold(struct pargs *pa);
885 void procinit(void);
886 void proc_linkup(struct proc *p, struct ksegrp *kg, struct thread *td);
887 void proc_reparent(struct proc *child, struct proc *newparent);
888 struct pstats *pstats_alloc(void);
889 void pstats_fork(struct pstats *src, struct pstats *dst);
890 void pstats_free(struct pstats *ps);
891 int securelevel_ge(struct ucred *cr, int level);
892 int securelevel_gt(struct ucred *cr, int level);
893 void sessrele(struct session *);
894 void setrunnable(struct thread *);
895 void setrunqueue(struct thread *, int flags);
896 void setsugid(struct proc *p);
897 int sigonstack(size_t sp);
898 void sleepinit(void);
899 void stopevent(struct proc *, u_int, u_int);
900 void threadinit(void);
901 void cpu_idle(void);
902 extern void (*cpu_idle_hook)(void); /* Hook to machdep CPU idler. */
903 void cpu_switch(struct thread *old, struct thread *new);
904 void cpu_throw(struct thread *old, struct thread *new) __dead2;
905 void unsleep(struct thread *);
906 void userret(struct thread *, struct trapframe *, u_int);
907
908 void cpu_exit(struct thread *);
909 void exit1(struct thread *, int) __dead2;
910 void cpu_fork(struct thread *, struct proc *, struct thread *, int);
911 void cpu_set_fork_handler(struct thread *, void (*)(void *), void *);
912
913 /* New in KSE. */
914 struct ksegrp *ksegrp_alloc(void);
915 void ksegrp_free(struct ksegrp *kg);
916 void ksegrp_stash(struct ksegrp *kg);
917 void kse_GC(void);
918 void kseinit(void);
919 void cpu_set_upcall(struct thread *td, struct thread *td0);
920 void cpu_set_upcall_kse(struct thread *, void (*)(void *), void *, stack_t *);
921 int cpu_set_user_tls(struct thread *, void *tls_base);
922 void cpu_thread_clean(struct thread *);
923 void cpu_thread_exit(struct thread *);
924 void cpu_thread_setup(struct thread *td);
925 void cpu_thread_siginfo(int sig, u_long code, siginfo_t *si);
926 void cpu_thread_swapin(struct thread *);
927 void cpu_thread_swapout(struct thread *);
928 void ksegrp_link(struct ksegrp *kg, struct proc *p);
929 void ksegrp_unlink(struct ksegrp *kg);
930 struct thread *thread_alloc(void);
931 void thread_continued(struct proc *p);
932 void thread_exit(void) __dead2;
933 int thread_export_context(struct thread *td, int willexit);
934 void thread_free(struct thread *td);
935 void thread_link(struct thread *td, struct ksegrp *kg);
936 void thread_reap(void);
937 struct thread *thread_schedule_upcall(struct thread *td, struct kse_upcall *ku);
938 void thread_signal_add(struct thread *td, int sig);
939 int thread_single(int how);
940 void thread_single_end(void);
941 int thread_sleep_check(struct thread *td);
942 void thread_stash(struct thread *td);
943 int thread_statclock(int user);
944 void thread_stopped(struct proc *p);
945 int thread_suspend_check(int how);
946 void thread_suspend_one(struct thread *td);
947 struct thread *thread_switchout(struct thread *td, int flags,
948 struct thread *newtd);
949 void thread_unlink(struct thread *td);
950 void thread_unsuspend(struct proc *p);
951 void thread_unsuspend_one(struct thread *td);
952 void thread_unthread(struct thread *td);
953 int thread_userret(struct thread *td, struct trapframe *frame);
954 void thread_user_enter(struct thread *td);
955 void thread_wait(struct proc *p);
956 void thr_exit1(void);
957 struct kse_upcall *upcall_alloc(void);
958 void upcall_free(struct kse_upcall *ku);
959 void upcall_link(struct kse_upcall *ku, struct ksegrp *kg);
960 void upcall_unlink(struct kse_upcall *ku);
961 void upcall_remove(struct thread *td);
962 void upcall_stash(struct kse_upcall *ke);
963
964 #endif /* _KERNEL */
965
966 #endif /* !_SYS_PROC_H_ */
Cache object: d6464ea24eb2edc597261ea143d339dd
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