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source: rtems-libbsd/freebsd/sys/sys/proc.h @ 0bcf341

4.1155-freebsd-126-freebsd-12freebsd-9.3

Last change on this file since 0bcf341 was 0bcf341, checked in by Sebastian Huber <sebastian.huber@…>, on 10/10/13 at 12:32:36
Delete unused struct proc fields
Property mode set to `100644`
File size: 37.9 KB

Line
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	#include <sys/condvar.h>
44	#ifndef _KERNEL
45	#include <sys/filedesc.h>
46	#endif
47	#include <sys/queue.h>
48	#include <sys/_lock.h>
49	#include <sys/lock_profile.h>
50	#include <sys/_mutex.h>
51	#include <sys/osd.h>
52	#include <sys/priority.h>
53	#include <sys/rtprio.h> /* XXX. */
54	#include <sys/runq.h>
55	#include <rtems/bsd/sys/resource.h>
56	#include <sys/sigio.h>
57	#include <sys/signal.h>
58	#include <sys/signalvar.h>
59	#ifndef _KERNEL
60	#include <rtems/bsd/sys/time.h> /* For structs itimerval, timeval. */
61	#else
62	#include <sys/pcpu.h>
63	#endif
64	#include <sys/ucontext.h>
65	#include <sys/ucred.h>
66	#include <machine/proc.h> /* Machine-dependent proc substruct. */
67
68	/*
69	* One structure allocated per session.
70	*
71	* List of locks
72	* (m) locked by s_mtx mtx
73	* (e) locked by proctree_lock sx
74	* (c) const until freeing
75	*/
76	struct session {
77	u_int s_count; /* Ref cnt; pgrps in session - atomic. */
78	struct proc s_leader; / (m + e) Session leader. */
79	struct vnode s_ttyvp; / (m) Vnode of controlling tty. */
80	struct tty s_ttyp; / (e) Controlling tty. */
81	pid_t s_sid; /* (c) Session ID. */
82	/* (m) Setlogin() name: */
83	char s_login[roundup(MAXLOGNAME, sizeof(long))];
84	struct mtx s_mtx; /* Mutex to protect members. */
85	};
86
87	/*
88	* One structure allocated per process group.
89	*
90	* List of locks
91	* (m) locked by pg_mtx mtx
92	* (e) locked by proctree_lock sx
93	* (c) const until freeing
94	*/
95	struct pgrp {
96	LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */
97	LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */
98	struct session pg_session; / (c) Pointer to session. */
99	struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */
100	pid_t pg_id; /* (c) Process group id. */
101	int pg_jobc; /* (m) Job control process count. */
102	struct mtx pg_mtx; /* Mutex to protect members */
103	};
104
105	/*
106	* pargs, used to hold a copy of the command line, if it had a sane length.
107	*/
108	struct pargs {
109	u_int ar_ref; /* Reference count. */
110	u_int ar_length; /* Length. */
111	u_char ar_args[1]; /* Arguments. */
112	};
113
114	/*-
115	* Description of a process.
116	*
117	* This structure contains the information needed to manage a thread of
118	* control, known in UN*X as a process; it has references to substructures
119	* containing descriptions of things that the process uses, but may share
120	* with related processes. The process structure and the substructures
121	* are always addressable except for those marked "(CPU)" below,
122	* which might be addressable only on a processor on which the process
123	* is running.
124	*
125	* Below is a key of locks used to protect each member of struct proc. The
126	* lock is indicated by a reference to a specific character in parens in the
127	* associated comment.
128	* * - not yet protected
129	* a - only touched by curproc or parent during fork/wait
130	* b - created at fork, never changes
131	* (exception aiods switch vmspaces, but they are also
132	* marked 'P_SYSTEM' so hopefully it will be left alone)
133	* c - locked by proc mtx
134	* d - locked by allproc_lock lock
135	* e - locked by proctree_lock lock
136	* f - session mtx
137	* g - process group mtx
138	* h - callout_lock mtx
139	* i - by curproc or the master session mtx
140	* j - locked by proc slock
141	* k - only accessed by curthread
142	* k*- only accessed by curthread and from an interrupt
143	* l - the attaching proc or attaching proc parent
144	* m - Giant
145	* n - not locked, lazy
146	* o - ktrace lock
147	* q - td_contested lock
148	* r - p_peers lock
149	* t - thread lock
150	* x - created at fork, only changes during single threading in exec
151	* y - created at first aio, doesn't change until exit or exec at which
152	* point we are single-threaded and only curthread changes it
153	* z - zombie threads lock
154	*
155	* If the locking key specifies two identifiers (for example, p_pptr) then
156	* either lock is sufficient for read access, but both locks must be held
157	* for write access.
158	*/
159	struct kaudit_record;
160	struct td_sched;
161	struct nlminfo;
162	struct kaioinfo;
163	struct p_sched;
164	struct proc;
165	struct sleepqueue;
166	struct thread;
167	struct trapframe;
168	struct turnstile;
169	struct mqueue_notifier;
170	struct kdtrace_proc;
171	struct kdtrace_thread;
172	struct cpuset;
173
174	/*
175	* XXX: Does this belong in resource.h or resourcevar.h instead?
176	* Resource usage extension. The times in rusage structs in the kernel are
177	* never up to date. The actual times are kept as runtimes and tick counts
178	* (with control info in the "previous" times), and are converted when
179	* userland asks for rusage info. Backwards compatibility prevents putting
180	* this directly in the user-visible rusage struct.
181	*
182	* Locking for p_rux: (cj) means (j) for p_rux and (c) for p_crux.
183	* Locking for td_rux: (t) for all fields.
184	*/
185	struct rusage_ext {
186	u_int64_t rux_runtime; /* (cj) Real time. */
187	u_int64_t rux_uticks; /* (cj) Statclock hits in user mode. */
188	u_int64_t rux_sticks; /* (cj) Statclock hits in sys mode. */
189	u_int64_t rux_iticks; /* (cj) Statclock hits in intr mode. */
190	u_int64_t rux_uu; /* (c) Previous user time in usec. */
191	u_int64_t rux_su; /* (c) Previous sys time in usec. */
192	u_int64_t rux_tu; /* (c) Previous total time in usec. */
193	};
194
195	/*
196	* Kernel runnable context (thread).
197	* This is what is put to sleep and reactivated.
198	* Thread context. Processes may have multiple threads.
199	*/
200	struct thread {
201	#ifdef __rtems__
202	rtems_chain_node td_node;
203	Thread_Control *td_thread;
204	char td_name [16];
205	#endif /* __rtems__ */
206	#ifndef __rtems__
207	struct mtx volatile td_lock; / replaces sched lock */
208	#endif /* __rtems__ */
209	struct proc td_proc; / () Associated process. /
210	#ifndef __rtems__
211	TAILQ_ENTRY(thread) td_plist; /* () All threads in this proc. /
212	TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */
213	TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */
214	TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */
215	struct cpuset td_cpuset; / (t) CPU affinity mask. */
216	#endif /* __rtems__ */
217	struct seltd td_sel; / Select queue/channel. */
218	#ifndef __rtems__
219	struct sleepqueue td_sleepqueue; / (k) Associated sleep queue. */
220	struct turnstile td_turnstile; / (k) Associated turnstile. */
221	struct umtx_q td_umtxq; / (c?) Link for when we're blocked. */
222	lwpid_t td_tid; /* (b) Thread ID. */
223	sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */
224	#define td_siglist td_sigqueue.sq_signals
225
226	/* Cleared during fork1() */
227	#define td_startzero td_flags
228	int td_flags; /* (t) TDF_* flags. */
229	int td_inhibitors; /* (t) Why can not run. */
230	int td_pflags; /* (k) Private thread (TDP_) flags. /
231	int td_dupfd; /* (k) Ret value from fdopen. XXX */
232	int td_sqqueue; /* (t) Sleepqueue queue blocked on. */
233	void td_wchan; / (t) Sleep address. */
234	const char td_wmesg; / (t) Reason for sleep. */
235	u_char td_lastcpu; /* (t) Last cpu we were on. */
236	u_char td_oncpu; /* (t) Which cpu we are on. */
237	volatile u_char td_owepreempt; /* (k) Preempt on last critical_exit /
238	u_char td_tsqueue; /* (t) Turnstile queue blocked on. */
239	short td_locks; /* (k) Count of non-spin locks. */
240	short td_rw_rlocks; /* (k) Count of rwlock read locks. */
241	short td_lk_slocks; /* (k) Count of lockmgr shared locks. */
242	struct turnstile td_blocked; / (t) Lock thread is blocked on. */
243	const char td_lockname; / (t) Name of lock blocked on. */
244	LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */
245	struct lock_list_entry td_sleeplocks; / (k) Held sleep locks. */
246	int td_intr_nesting_level; /* (k) Interrupt recursion. */
247	int td_pinned; /* (k) Temporary cpu pin count. */
248	#endif /* __rtems__ */
249	struct ucred td_ucred; / (k) Reference to credentials. */
250	#ifndef __rtems__
251	u_int td_estcpu; /* (t) estimated cpu utilization */
252	int td_slptick; /* (t) Time at sleep. */
253	int td_blktick; /* (t) Time spent blocked. */
254	struct rusage td_ru; /* (t) rusage information. */
255	uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */
256	uint64_t td_runtime; /* (t) How many cpu ticks we've run. */
257	u_int td_pticks; /* (t) Statclock hits for profiling */
258	u_int td_sticks; /* (t) Statclock hits in system mode. */
259	u_int td_iticks; /* (t) Statclock hits in intr mode. */
260	u_int td_uticks; /* (t) Statclock hits in user mode. */
261	int td_intrval; /* (t) Return value for sleepq. */
262	sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */
263	sigset_t td_sigmask; /* (c) Current signal mask. */
264	volatile u_int td_generation; /* (k) For detection of preemption */
265	stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */
266	int td_xsig; /* (c) Signal for ptrace */
267	u_long td_profil_addr; /* (k) Temporary addr until AST. */
268	u_int td_profil_ticks; /* (k) Temporary ticks until AST. */
269	char td_name[MAXCOMLEN + 1]; /* () Thread name. /
270	struct file td_fpop; / (k) file referencing cdev under op */
271	int td_dbgflags; /* (c) Userland debugger flags */
272	struct ksiginfo td_dbgksi; /* (c) ksi reflected to debugger. */
273	int td_ng_outbound; /* (k) Thread entered ng from above. */
274	struct osd td_osd; /* (k) Object specific data. */
275	#define td_endzero td_base_pri
276
277	/* Copied during fork1() or thread_sched_upcall(). */
278	#define td_startcopy td_endzero
279	u_char td_rqindex; /* (t) Run queue index. */
280	u_char td_base_pri; /* (t) Thread base kernel priority. */
281	u_char td_priority; /* (t) Thread active priority. */
282	u_char td_pri_class; /* (t) Scheduling class. */
283	u_char td_user_pri; /* (t) User pri from estcpu and nice. */
284	u_char td_base_user_pri; /* (t) Base user pri */
285	#define td_endcopy td_pcb
286
287	/*
288	* Fields that must be manually set in fork1() or thread_sched_upcall()
289	* or already have been set in the allocator, constructor, etc.
290	*/
291	struct pcb td_pcb; / (k) Kernel VA of pcb and kstack. */
292	enum {
293	TDS_INACTIVE = 0x0,
294	TDS_INHIBITED,
295	TDS_CAN_RUN,
296	TDS_RUNQ,
297	TDS_RUNNING
298	} td_state; /* (t) thread state */
299	#endif /* __rtems__ */
300	register_t td_retval[2]; /* (k) Syscall aux returns. */
301	#ifndef __rtems__
302	struct callout td_slpcallout; /* (h) Callout for sleep. */
303	struct trapframe td_frame; / (k) */
304	struct vm_object td_kstack_obj;/ (a) Kstack object. */
305	vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
306	int td_kstack_pages; /* (a) Size of the kstack. */
307	void *td_unused1;
308	vm_offset_t td_unused2;
309	int td_unused3;
310	volatile u_int td_critnest; /* (k) Critical section nest level. /
311	struct mdthread td_md; /* (k) Any machine-dependent fields. */
312	struct td_sched td_sched; / () Scheduler-specific data. /
313	struct kaudit_record td_ar; / (k) Active audit record, if any. */
314	int td_syscalls; /* per-thread syscall count (used by NFS :)) */
315	struct lpohead td_lprof[2]; /* (a) lock profiling objects. */
316	struct kdtrace_thread td_dtrace; / () DTrace-specific data. /
317	int td_errno; /* Error returned by last syscall. */
318	struct vnet td_vnet; / (k) Effective vnet. */
319	const char td_vnet_lpush; / (k) Debugging vnet push / pop. */
320	struct rusage_ext td_rux; /* (t) Internal rusage information. */
321	struct vm_map_entry td_map_def_user; / (k) Deferred entries. */
322	#endif /* __rtems__ */
323	};
324
325	struct mtx thread_lock_block(struct thread );
326	void thread_lock_unblock(struct thread , struct mtx );
327	void thread_lock_set(struct thread , struct mtx );
328	#define THREAD_LOCK_ASSERT(td, type) \
329	do { \
330	struct mtx *__m = (td)->td_lock; \
331	if (__m != &blocked_lock) \
332	mtx_assert(__m, (type)); \
333	} while (0)
334
335	#ifdef INVARIANTS
336	#define THREAD_LOCKPTR_ASSERT(td, lock) \
337	do { \
338	struct mtx *__m = (td)->td_lock; \
339	KASSERT((__m == &blocked_lock \|\| __m == (lock)), \
340	("Thread %p lock %p does not match %p", td, __m, (lock))); \
341	} while (0)
342	#else
343	#define THREAD_LOCKPTR_ASSERT(td, lock)
344	#endif
345
346	#define CRITICAL_ASSERT(td) \
347	KASSERT((td)->td_critnest >= 1, ("Not in critical section"));
348
349	/*
350	* Flags kept in td_flags:
351	* To change these you MUST have the scheduler lock.
352	*/
353	#define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */
354	#define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */
355	#define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */
356	#define TDF_SINTR 0x00000008 /* Sleep is interruptible. */
357	#define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */
358	#define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */
359	#define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */
360	#define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */
361	#define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */
362	#define TDF_UBORROWING 0x00000200 /* Thread is borrowing user pri. */
363	#define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */
364	#define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */
365	#define TDF_TIMOFAIL 0x00001000 /* Timeout from sleep after we were awake. */
366	#define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */
367	#define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */
368	#define TDF_NEEDSUSPCHK 0x00008000 /* Thread may need to suspend. */
369	#define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */
370	#define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */
371	#define TDF_UNUSED18 0x00040000 /* --available-- */
372	#define TDF_UNUSED19 0x00080000 /* Thread is sleeping on a umtx. */
373	#define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */
374	#define TDF_UNUSED21 0x00200000 /* --available-- */
375	#define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */
376	#define TDF_UNUSED23 0x00800000 /* --available-- */
377	#define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */
378	#define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */
379	#define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */
380	#define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */
381	#define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */
382	#define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */
383	#define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */
384
385	/* Userland debug flags */
386	#define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */
387	#define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */
388	#define TDB_USERWR 0x00000004 /* Debugger modified memory or registers */
389	#define TDB_SCE 0x00000008 /* Thread performs syscall enter */
390	#define TDB_SCX 0x00000010 /* Thread performs syscall exit */
391	#define TDB_EXEC 0x00000020 /* TDB_SCX from exec(2) family */
392
393	/*
394	* "Private" flags kept in td_pflags:
395	* These are only written by curthread and thus need no locking.
396	*/
397	#define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */
398	#define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */
399	#define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */
400	#define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */
401	#define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */
402	#define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */
403	#define TDP_DEADLKTREAT 0x00000040 /* Lock aquisition - deadlock treatment. */
404	#define TDP_UNUSED80 0x00000080 /* available. */
405	#define TDP_NOSLEEPING 0x00000100 /* Thread is not allowed to sleep on a sq. */
406	#define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */
407	#define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */
408	#define TDP_UNUSED800 0x00000800 /* available. */
409	#define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */
410	#define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */
411	#define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */
412	#define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */
413	#define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */
414	#define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */
415	#define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */
416	#define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */
417	#define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */
418	#define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */
419	#define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */
420	#define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */
421	#define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */
422
423	/*
424	* Reasons that the current thread can not be run yet.
425	* More than one may apply.
426	*/
427	#define TDI_SUSPENDED 0x0001 /* On suspension queue. */
428	#define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
429	#define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */
430	#define TDI_LOCK 0x0008 /* Stopped on a lock. */
431	#define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
432
433	#define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
434	#define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
435	#define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
436	#define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
437	#define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
438	#define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
439	#define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
440	#define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
441	#define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
442	#define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
443	#define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED)
444	#define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD)
445
446
447	#define TD_SET_INHIB(td, inhib) do { \
448	(td)->td_state = TDS_INHIBITED; \
449	(td)->td_inhibitors \|= (inhib); \
450	} while (0)
451
452	#define TD_CLR_INHIB(td, inhib) do { \
453	if (((td)->td_inhibitors & (inhib)) && \
454	(((td)->td_inhibitors &= ~(inhib)) == 0)) \
455	(td)->td_state = TDS_CAN_RUN; \
456	} while (0)
457
458	#define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
459	#define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
460	#define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
461	#define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
462	#define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
463	#define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
464
465	#define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
466	#define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
467	#define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
468	#define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
469	#define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
470
471	#define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING
472	#define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ
473	#define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN
474
475	/*
476	* Process structure.
477	*/
478	struct proc {
479	#ifndef __rtems__
480	LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
481	TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */
482	struct mtx p_slock; /* process spin lock */
483	struct ucred p_ucred; / (c) Process owner's identity. */
484	struct filedesc p_fd; / (b) Open files. */
485	struct filedesc_to_leader p_fdtol; / (b) Tracking node */
486	struct pstats p_stats; / (b) Accounting/statistics (CPU). */
487	struct plimit p_limit; / (c) Process limits. */
488	struct callout p_limco; /* (c) Limit callout handle */
489	struct sigacts p_sigacts; / (x) Signal actions, state (CPU). */
490
491	/*
492	* The following don't make too much sense.
493	* See the td_ or ke_ versions of the same flags.
494	*/
495	int p_flag; /* (c) P_* flags. */
496	enum {
497	PRS_NEW = 0, /* In creation */
498	PRS_NORMAL, /* threads can be run. */
499	PRS_ZOMBIE
500	} p_state; /* (j/c) S* process status. */
501	pid_t p_pid; /* (b) Process identifier. */
502	LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
503	LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
504	struct proc p_pptr; / (c + e) Pointer to parent process. */
505	LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
506	LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
507	struct mtx p_mtx; /* (n) Lock for this struct. */
508	struct ksiginfo p_ksi; / Locked by parent proc lock */
509	sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */
510	#define p_siglist p_sigqueue.sq_signals
511
512	/* The following fields are all zeroed upon creation in fork. */
513	#define p_startzero p_oppid
514	pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */
515	struct vmspace p_vmspace; / (b) Address space. */
516	u_int p_swtick; /* (c) Tick when swapped in or out. */
517	struct itimerval p_realtimer; /* (c) Alarm timer. */
518	struct rusage p_ru; /* (a) Exit information. */
519	struct rusage_ext p_rux; /* (cj) Internal resource usage. */
520	struct rusage_ext p_crux; /* (c) Internal child resource usage. */
521	int p_profthreads; /* (c) Num threads in addupc_task. */
522	volatile int p_exitthreads; /* (j) Number of threads exiting */
523	int p_traceflag; /* (o) Kernel trace points. */
524	struct vnode p_tracevp; / (c + o) Trace to vnode. */
525	struct ucred p_tracecred; / (o) Credentials to trace with. */
526	struct vnode p_textvp; / (b) Vnode of executable. */
527	u_int p_lock; /* (c) Proclock (prevent swap) count. */
528	struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
529	int p_sigparent; /* (c) Signal to parent on exit. */
530	int p_sig; /* (n) For core dump/debugger XXX. */
531	u_long p_code; /* (n) For core dump/debugger XXX. */
532	u_int p_stops; /* (c) Stop event bitmask. */
533	u_int p_stype; /* (c) Stop event type. */
534	char p_step; /* (c) Process is stopped. */
535	u_char p_pfsflags; /* (c) Procfs flags. */
536	struct nlminfo p_nlminfo; / (?) Only used by/for lockd. */
537	struct kaioinfo p_aioinfo; / (y) ASYNC I/O info. */
538	struct thread p_singlethread;/ (c + j) If single threading this is it */
539	int p_suspcount; /* (j) Num threads in suspended mode. */
540	struct thread p_xthread; / (c) Trap thread */
541	int p_boundary_count;/* (c) Num threads at user boundary */
542	int p_pendingcnt; /* how many signals are pending */
543	struct itimers p_itimers; / (c) POSIX interval timers. */
544	/* End area that is zeroed on creation. */
545	#define p_endzero p_magic
546
547	/* The following fields are all copied upon creation in fork. */
548	#define p_startcopy p_endzero
549	u_int p_magic; /* (b) Magic number. */
550	int p_osrel; /* (x) osreldate for the
551	binary (from ELF note, if any) */
552	char p_comm[MAXCOMLEN + 1]; /* (b) Process name. */
553	struct pgrp p_pgrp; / (c + e) Pointer to process group. */
554	struct sysentvec p_sysent; / (b) Syscall dispatch info. */
555	struct pargs p_args; / (c) Process arguments. */
556	rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */
557	signed char p_nice; /* (c) Process "nice" value. */
558	int p_fibnum; /* in this routing domain XXX MRT */
559	/* End area that is copied on creation. */
560	#define p_endcopy p_xstat
561
562	u_short p_xstat; /* (c) Exit status; also stop sig. */
563	struct knlist p_klist; /* (c) Knotes attached to this proc. */
564	int p_numthreads; /* (c) Number of threads. */
565	struct mdproc p_md; /* Any machine-dependent fields. */
566	struct callout p_itcallout; /* (h + c) Interval timer callout. */
567	u_short p_acflag; /* (c) Accounting flags. */
568	struct proc p_peers; / (r) */
569	struct proc p_leader; / (b) */
570	void p_emuldata; / (c) Emulator state data. */
571	struct label p_label; / () Proc (not subject) MAC label. /
572	struct p_sched p_sched; / () Scheduler-specific data. /
573	STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */
574	LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/
575	struct kdtrace_proc p_dtrace; / () DTrace-specific data. /
576	struct cv p_pwait; /* () wait cv for exit/exec /
577	#else /* __rtems__ */
578	struct ucred p_ucred; / (c) Process owner's identity. */
579	struct mtx p_mtx; /* (n) Lock for this struct. */
580	rtems_id p_pid;
581	int p_fibnum; /* in this routing domain XXX MRT */
582	#endif /* __rtems__ */
583	};
584
585	#define p_session p_pgrp->pg_session
586	#define p_pgid p_pgrp->pg_id
587
588	#define NOCPU 0xff /* For when we aren't on a CPU. */
589
590	#define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock)
591	#define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock)
592	#define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type))
593
594	/* These flags are kept in p_flag. */
595	#define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
596	#define P_CONTROLT 0x00002 /* Has a controlling terminal. */
597	#define P_KTHREAD 0x00004 /* Kernel thread (). /
598	#define P_NOLOAD 0x00008 /* Ignore during load avg calculations. */
599	#define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
600	#define P_PROFIL 0x00020 /* Has started profiling. */
601	#define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */
602	#define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */
603	#define P_SUGID 0x00100 /* Had set id privileges since last exec. */
604	#define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
605	#define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */
606	#define P_TRACED 0x00800 /* Debugged process being traced. */
607	#define P_WAITED 0x01000 /* Someone is waiting for us. */
608	#define P_WEXIT 0x02000 /* Working on exiting. */
609	#define P_EXEC 0x04000 /* Process called exec. */
610	#define P_WKILLED 0x08000 /* Killed, go to kernel/user boundary ASAP. */
611	#define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
612	#define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */
613	#define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */
614	#define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */
615	#define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
616	#define P_SIGEVENT 0x200000 /* Process pending signals changed. */
617	#define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */
618	#define P_HWPMC 0x800000 /* Process is using HWPMCs */
619
620	#define P_JAILED 0x1000000 /* Process is in jail. */
621	#define P_INEXEC 0x4000000 /* Process is in execve(). */
622	#define P_STATCHILD 0x8000000 /* Child process stopped or exited. */
623	#define P_INMEM 0x10000000 /* Loaded into memory. */
624	#define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */
625	#define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */
626
627	#define P_STOPPED (P_STOPPED_SIG\|P_STOPPED_SINGLE\|P_STOPPED_TRACE)
628	#define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
629	#define P_KILLED(p) ((p)->p_flag & P_WKILLED)
630
631	/*
632	* These were process status values (p_stat), now they are only used in
633	* legacy conversion code.
634	*/
635	#define SIDL 1 /* Process being created by fork. */
636	#define SRUN 2 /* Currently runnable. */
637	#define SSLEEP 3 /* Sleeping on an address. */
638	#define SSTOP 4 /* Process debugging or suspension. */
639	#define SZOMB 5 /* Awaiting collection by parent. */
640	#define SWAIT 6 /* Waiting for interrupt. */
641	#define SLOCK 7 /* Blocked on a lock. */
642
643	#define P_MAGIC 0xbeefface
644
645	#ifdef _KERNEL
646
647	/* Types and flags for mi_switch(). */
648	#define SW_TYPE_MASK 0xff /* First 8 bits are switch type */
649	#define SWT_NONE 0 /* Unspecified switch. */
650	#define SWT_PREEMPT 1 /* Switching due to preemption. */
651	#define SWT_OWEPREEMPT 2 /* Switching due to opepreempt. */
652	#define SWT_TURNSTILE 3 /* Turnstile contention. */
653	#define SWT_SLEEPQ 4 /* Sleepq wait. */
654	#define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */
655	#define SWT_RELINQUISH 6 /* yield call. */
656	#define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */
657	#define SWT_IDLE 8 /* Switching from the idle thread. */
658	#define SWT_IWAIT 9 /* Waiting for interrupts. */
659	#define SWT_SUSPEND 10 /* Thread suspended. */
660	#define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */
661	#define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */
662	#define SWT_COUNT 13 /* Number of switch types. */
663	/* Flags */
664	#define SW_VOL 0x0100 /* Voluntary switch. */
665	#define SW_INVOL 0x0200 /* Involuntary switch. */
666	#define SW_PREEMPT 0x0400 /* The invol switch is a preemption */
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	#ifdef MALLOC_DECLARE
674	MALLOC_DECLARE(M_PARGS);
675	MALLOC_DECLARE(M_PGRP);
676	MALLOC_DECLARE(M_SESSION);
677	MALLOC_DECLARE(M_SUBPROC);
678	MALLOC_DECLARE(M_ZOMBIE);
679	#endif
680
681	#define FOREACH_PROC_IN_SYSTEM(p) \
682	LIST_FOREACH((p), &allproc, p_list)
683	#define FOREACH_THREAD_IN_PROC(p, td) \
684	TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
685
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
697
698	#define STOPEVENT(p, e, v) do { \
699	if ((p)->p_stops & (e)) { \
700	PROC_LOCK(p); \
701	stopevent((p), (e), (v)); \
702	PROC_UNLOCK(p); \
703	} \
704	} while (0)
705	#define _STOPEVENT(p, e, v) do { \
706	PROC_LOCK_ASSERT(p, MA_OWNED); \
707	WITNESS_WARN(WARN_GIANTOK \| WARN_SLEEPOK, &p->p_mtx.lock_object, \
708	"checking stopevent %d", (e)); \
709	if ((p)->p_stops & (e)) \
710	stopevent((p), (e), (v)); \
711	} while (0)
712
713	/* Lock and unlock a process. */
714	#define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
715	#define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
716	#define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
717	#define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
718	#define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
719
720	/* Lock and unlock a process group. */
721	#define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
722	#define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
723	#define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
724	#define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
725
726	#define PGRP_LOCK_PGSIGNAL(pg) do { \
727	if ((pg) != NULL) \
728	PGRP_LOCK(pg); \
729	} while (0)
730	#define PGRP_UNLOCK_PGSIGNAL(pg) do { \
731	if ((pg) != NULL) \
732	PGRP_UNLOCK(pg); \
733	} while (0)
734
735	/* Lock and unlock a session. */
736	#define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
737	#define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
738	#define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
739	#define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
740
741	/* Hold process U-area in memory, normally for ptrace/procfs work. */
742	#define PHOLD(p) do { \
743	PROC_LOCK(p); \
744	_PHOLD(p); \
745	PROC_UNLOCK(p); \
746	} while (0)
747	#define _PHOLD(p) do { \
748	PROC_LOCK_ASSERT((p), MA_OWNED); \
749	KASSERT(!((p)->p_flag & P_WEXIT) \|\| (p) == curproc, \
750	("PHOLD of exiting process")); \
751	(p)->p_lock++; \
752	if (((p)->p_flag & P_INMEM) == 0) \
753	faultin((p)); \
754	} while (0)
755	#define PROC_ASSERT_HELD(p) do { \
756	KASSERT((p)->p_lock > 0, ("process not held")); \
757	} while (0)
758
759	#define PRELE(p) do { \
760	PROC_LOCK((p)); \
761	_PRELE((p)); \
762	PROC_UNLOCK((p)); \
763	} while (0)
764	#define _PRELE(p) do { \
765	PROC_LOCK_ASSERT((p), MA_OWNED); \
766	(--(p)->p_lock); \
767	if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \
768	wakeup(&(p)->p_lock); \
769	} while (0)
770	#define PROC_ASSERT_NOT_HELD(p) do { \
771	KASSERT((p)->p_lock == 0, ("process held")); \
772	} while (0)
773
774	/* Check whether a thread is safe to be swapped out. */
775	#define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP)
776
777	/* Control whether or not it is safe for curthread to sleep. */
778	#define THREAD_NO_SLEEPING() do { \
779	KASSERT(!(curthread->td_pflags & TDP_NOSLEEPING), \
780	("nested no sleeping")); \
781	curthread->td_pflags \|= TDP_NOSLEEPING; \
782	} while (0)
783
784	#define THREAD_SLEEPING_OK() do { \
785	KASSERT((curthread->td_pflags & TDP_NOSLEEPING), \
786	("nested sleeping ok")); \
787	curthread->td_pflags &= ~TDP_NOSLEEPING; \
788	} while (0)
789
790	#define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
791	extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
792	extern u_long pidhash;
793
794	#define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
795	extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
796	extern u_long pgrphash;
797
798	extern struct sx allproc_lock;
799	extern struct sx proctree_lock;
800	extern struct mtx ppeers_lock;
801	extern struct proc proc0; /* Process slot for swapper. */
802	#ifndef __rtems__
803	extern struct thread thread0; /* Primary thread in proc0. */
804	#else /* __rtems__ */
805	extern struct ucred *rtems_bsd_thread0_ucred;
806	#endif /* __rtems__ */
807	extern struct vmspace vmspace0; /* VM space for proc0. */
808	extern int hogticks; /* Limit on kernel cpu hogs. */
809	extern int lastpid;
810	extern int nprocs, maxproc; /* Current and max number of procs. */
811	extern int maxprocperuid; /* Max procs per uid. */
812	extern u_long ps_arg_cache_limit;
813
814	LIST_HEAD(proclist, proc);
815	TAILQ_HEAD(procqueue, proc);
816	TAILQ_HEAD(threadqueue, thread);
817	extern struct proclist allproc; /* List of all processes. */
818	extern struct proclist zombproc; /* List of zombie processes. */
819	extern struct proc initproc, pageproc; /* Process slots for init, pager. */
820
821	extern struct uma_zone *proc_zone;
822
823	struct proc pfind(pid_t); / Find process by id. */
824	struct pgrp pgfind(pid_t); / Find process group by id. */
825	struct proc zpfind(pid_t); / Find zombie process by id. */
826
827	void ast(struct trapframe *framep);
828	struct thread *choosethread(void);
829	int cr_cansignal(struct ucred cred, struct proc proc, int signum);
830	int enterpgrp(struct proc p, pid_t pgid, struct pgrp pgrp,
831	struct session *sess);
832	int enterthispgrp(struct proc p, struct pgrp pgrp);
833	void faultin(struct proc *p);
834	void fixjobc(struct proc p, struct pgrp pgrp, int entering);
835	int fork1(struct thread , int, int, struct proc *);
836	void fork_exit(void ()(void , struct trapframe ), void ,
837	struct trapframe *);
838	void fork_return(struct thread , struct trapframe );
839	int inferior(struct proc *p);
840	void kick_proc0(void);
841	int leavepgrp(struct proc *p);
842	int maybe_preempt(struct thread *td);
843	void mi_switch(int flags, struct thread *newtd);
844	int p_candebug(struct thread td, struct proc p);
845	int p_cansee(struct thread td, struct proc p);
846	int p_cansched(struct thread td, struct proc p);
847	int p_cansignal(struct thread td, struct proc p, int signum);
848	int p_canwait(struct thread td, struct proc p);
849	struct pargs *pargs_alloc(int len);
850	void pargs_drop(struct pargs *pa);
851	void pargs_hold(struct pargs *pa);
852	void procinit(void);
853	void proc_linkup0(struct proc p, struct thread td);
854	void proc_linkup(struct proc p, struct thread td);
855	void proc_reparent(struct proc child, struct proc newparent);
856	struct pstats *pstats_alloc(void);
857	void pstats_fork(struct pstats src, struct pstats dst);
858	void pstats_free(struct pstats *ps);
859	int securelevel_ge(struct ucred *cr, int level);
860	int securelevel_gt(struct ucred *cr, int level);
861	void sess_hold(struct session *);
862	void sess_release(struct session *);
863	int setrunnable(struct thread *);
864	void setsugid(struct proc *p);
865	int sigonstack(size_t sp);
866	void sleepinit(void);
867	void stopevent(struct proc *, u_int, u_int);
868	void threadinit(void);
869	void cpu_idle(int);
870	int cpu_idle_wakeup(int);
871	extern void (cpu_idle_hook)(void); / Hook to machdep CPU idler. */
872	void cpu_switch(struct thread , struct thread , struct mtx *);
873	void cpu_throw(struct thread , struct thread ) __dead2;
874	void unsleep(struct thread *);
875	void userret(struct thread , struct trapframe );
876	struct syscall_args;
877	int syscallenter(struct thread , struct syscall_args );
878	void syscallret(struct thread , int, struct syscall_args );
879
880	void cpu_exit(struct thread *);
881	void exit1(struct thread *, int) __dead2;
882	struct syscall_args;
883	int cpu_fetch_syscall_args(struct thread td, struct syscall_args sa);
884	void cpu_fork(struct thread , struct proc , struct thread *, int);
885	void cpu_set_fork_handler(struct thread , void ()(void ), void );
886	void cpu_set_syscall_retval(struct thread *, int);
887	void cpu_set_upcall(struct thread td, struct thread td0);
888	#ifndef __rtems__
889	void cpu_set_upcall_kse(struct thread , void ()(void ), void ,
890	stack_t *);
891	#endif /* __rtems__ */
892	int cpu_set_user_tls(struct thread , void tls_base);
893	void cpu_thread_alloc(struct thread *);
894	void cpu_thread_clean(struct thread *);
895	void cpu_thread_exit(struct thread *);
896	void cpu_thread_free(struct thread *);
897	void cpu_thread_swapin(struct thread *);
898	void cpu_thread_swapout(struct thread *);
899	struct thread *thread_alloc(int pages);
900	int thread_alloc_stack(struct thread *, int pages);
901	void thread_exit(void) __dead2;
902	void thread_free(struct thread *td);
903	void thread_link(struct thread td, struct proc p);
904	void thread_reap(void);
905	int thread_single(int how);
906	void thread_single_end(void);
907	void thread_stash(struct thread *td);
908	void thread_stopped(struct proc *p);
909	void childproc_stopped(struct proc *child, int reason);
910	void childproc_continued(struct proc *child);
911	void childproc_exited(struct proc *child);
912	int thread_suspend_check(int how);
913	void thread_suspend_switch(struct thread *);
914	void thread_suspend_one(struct thread *td);
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	void thread_wait(struct proc *p);
920	struct thread thread_find(struct proc p, lwpid_t tid);
921	void thr_exit1(void);
922
923	#endif /* _KERNEL */
924
925	#endif /* !_SYS_PROC_H_ */

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