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: stable/9/sys/sys/proc.h 304619 2016-08-22 18:12:24Z jhb $
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 <sys/resource.h>
56 #include <sys/sigio.h>
57 #include <sys/signal.h>
58 #include <sys/signalvar.h>
59 #ifndef _KERNEL
60 #include <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 cdev_priv *s_ttydp; /* (m) Device of controlling tty. */
81 struct tty *s_ttyp; /* (e) Controlling tty. */
82 pid_t s_sid; /* (c) Session ID. */
83 /* (m) Setlogin() name: */
84 char s_login[roundup(MAXLOGNAME, sizeof(long))];
85 struct mtx s_mtx; /* Mutex to protect members. */
86 };
87
88 /*
89 * One structure allocated per process group.
90 *
91 * List of locks
92 * (m) locked by pg_mtx mtx
93 * (e) locked by proctree_lock sx
94 * (c) const until freeing
95 */
96 struct pgrp {
97 LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */
98 LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */
99 struct session *pg_session; /* (c) Pointer to session. */
100 struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */
101 pid_t pg_id; /* (c) Process group id. */
102 int pg_jobc; /* (m) Job control process count. */
103 struct mtx pg_mtx; /* Mutex to protect members */
104 };
105
106 /*
107 * pargs, used to hold a copy of the command line, if it had a sane length.
108 */
109 struct pargs {
110 u_int ar_ref; /* Reference count. */
111 u_int ar_length; /* Length. */
112 u_char ar_args[1]; /* Arguments. */
113 };
114
115 /*-
116 * Description of a process.
117 *
118 * This structure contains the information needed to manage a thread of
119 * control, known in UN*X as a process; it has references to substructures
120 * containing descriptions of things that the process uses, but may share
121 * with related processes. The process structure and the substructures
122 * are always addressable except for those marked "(CPU)" below,
123 * which might be addressable only on a processor on which the process
124 * is running.
125 *
126 * Below is a key of locks used to protect each member of struct proc. The
127 * lock is indicated by a reference to a specific character in parens in the
128 * associated comment.
129 * * - not yet protected
130 * a - only touched by curproc or parent during fork/wait
131 * b - created at fork, never changes
132 * (exception aiods switch vmspaces, but they are also
133 * marked 'P_SYSTEM' so hopefully it will be left alone)
134 * c - locked by proc mtx
135 * d - locked by allproc_lock lock
136 * e - locked by proctree_lock lock
137 * f - session mtx
138 * g - process group mtx
139 * h - callout_lock mtx
140 * i - by curproc or the master session mtx
141 * j - locked by proc slock
142 * k - only accessed by curthread
143 * k*- only accessed by curthread and from an interrupt
144 * l - the attaching proc or attaching proc parent
145 * m - Giant
146 * n - not locked, lazy
147 * o - ktrace lock
148 * q - td_contested lock
149 * r - p_peers lock
150 * t - thread lock
151 * x - created at fork, only changes during single threading in exec
152 * y - created at first aio, doesn't change until exit or exec at which
153 * point we are single-threaded and only curthread changes it
154 * z - zombie threads lock
155 *
156 * If the locking key specifies two identifiers (for example, p_pptr) then
157 * either lock is sufficient for read access, but both locks must be held
158 * for write access.
159 */
160 struct cpuset;
161 struct kaioinfo;
162 struct kaudit_record;
163 struct kdtrace_proc;
164 struct kdtrace_thread;
165 struct mqueue_notifier;
166 struct nlminfo;
167 struct p_sched;
168 struct proc;
169 struct procdesc;
170 struct racct;
171 struct sbuf;
172 struct sleepqueue;
173 struct syscall_args;
174 struct td_sched;
175 struct thread;
176 struct trapframe;
177 struct turnstile;
178
179 /*
180 * XXX: Does this belong in resource.h or resourcevar.h instead?
181 * Resource usage extension. The times in rusage structs in the kernel are
182 * never up to date. The actual times are kept as runtimes and tick counts
183 * (with control info in the "previous" times), and are converted when
184 * userland asks for rusage info. Backwards compatibility prevents putting
185 * this directly in the user-visible rusage struct.
186 *
187 * Locking for p_rux: (cj) means (j) for p_rux and (c) for p_crux.
188 * Locking for td_rux: (t) for all fields.
189 */
190 struct rusage_ext {
191 uint64_t rux_runtime; /* (cj) Real time. */
192 uint64_t rux_uticks; /* (cj) Statclock hits in user mode. */
193 uint64_t rux_sticks; /* (cj) Statclock hits in sys mode. */
194 uint64_t rux_iticks; /* (cj) Statclock hits in intr mode. */
195 uint64_t rux_uu; /* (c) Previous user time in usec. */
196 uint64_t rux_su; /* (c) Previous sys time in usec. */
197 uint64_t rux_tu; /* (c) Previous total time in usec. */
198 };
199
200 /*
201 * Kernel runnable context (thread).
202 * This is what is put to sleep and reactivated.
203 * Thread context. Processes may have multiple threads.
204 */
205 struct thread {
206 struct mtx *volatile td_lock; /* replaces sched lock */
207 struct proc *td_proc; /* (*) Associated process. */
208 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */
209 TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */
210 TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */
211 TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */
212 LIST_ENTRY(thread) td_hash; /* (d) Hash chain. */
213 struct cpuset *td_cpuset; /* (t) CPU affinity mask. */
214 struct seltd *td_sel; /* Select queue/channel. */
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 u_char td_lend_user_pri; /* (t) Lend user pri. */
222
223 /* Cleared during fork1() */
224 #define td_startzero td_flags
225 int td_flags; /* (t) TDF_* flags. */
226 int td_inhibitors; /* (t) Why can not run. */
227 int td_pflags; /* (k) Private thread (TDP_*) flags. */
228 int td_dupfd; /* (k) Ret value from fdopen. XXX */
229 int td_sqqueue; /* (t) Sleepqueue queue blocked on. */
230 void *td_wchan; /* (t) Sleep address. */
231 const char *td_wmesg; /* (t) Reason for sleep. */
232 u_char td_lastcpu; /* (t) Last cpu we were on. */
233 u_char td_oncpu; /* (t) Which cpu we are on. */
234 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */
235 u_char td_tsqueue; /* (t) Turnstile queue blocked on. */
236 short td_locks; /* (k) Count of non-spin locks. */
237 short td_rw_rlocks; /* (k) Count of rwlock read locks. */
238 short td_lk_slocks; /* (k) Count of lockmgr shared locks. */
239 short td_stopsched; /* (k) Scheduler stopped. */
240 struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */
241 const char *td_lockname; /* (t) Name of lock blocked on. */
242 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */
243 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
244 int td_intr_nesting_level; /* (k) Interrupt recursion. */
245 int td_pinned; /* (k) Temporary cpu pin count. */
246 struct ucred *td_ucred; /* (k) Reference to credentials. */
247 u_int td_estcpu; /* (t) estimated cpu utilization */
248 int td_slptick; /* (t) Time at sleep. */
249 int td_blktick; /* (t) Time spent blocked. */
250 int td_swvoltick; /* (t) Time at last SW_VOL switch. */
251 u_int td_cow; /* (*) Number of copy-on-write faults */
252 struct rusage td_ru; /* (t) rusage information. */
253 struct rusage_ext td_rux; /* (t) Internal rusage information. */
254 uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */
255 uint64_t td_runtime; /* (t) How many cpu ticks we've run. */
256 u_int td_pticks; /* (t) Statclock hits for profiling */
257 u_int td_sticks; /* (t) Statclock hits in system mode. */
258 u_int td_iticks; /* (t) Statclock hits in intr mode. */
259 u_int td_uticks; /* (t) Statclock hits in user mode. */
260 int td_intrval; /* (t) Return value for sleepq. */
261 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */
262 sigset_t td_sigmask; /* (c) Current signal mask. */
263 volatile u_int td_generation; /* (k) For detection of preemption */
264 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */
265 int td_xsig; /* (c) Signal for ptrace */
266 u_long td_profil_addr; /* (k) Temporary addr until AST. */
267 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */
268 char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */
269 struct file *td_fpop; /* (k) file referencing cdev under op */
270 int td_dbgflags; /* (c) Userland debugger flags */
271 struct ksiginfo td_dbgksi; /* (c) ksi reflected to debugger. */
272 int td_ng_outbound; /* (k) Thread entered ng from above. */
273 struct osd td_osd; /* (k) Object specific data. */
274 struct vm_map_entry *td_map_def_user; /* (k) Deferred entries. */
275 pid_t td_dbg_forked; /* (c) Child pid for debugger. */
276 #define td_endzero td_rqindex
277
278 /* Copied during fork1() or thread_sched_upcall(). */
279 #define td_startcopy td_endzero
280 u_char td_rqindex; /* (t) Run queue index. */
281 u_char td_base_pri; /* (t) Thread base kernel priority. */
282 u_char td_priority; /* (t) Thread active priority. */
283 u_char td_pri_class; /* (t) Scheduling class. */
284 u_char td_user_pri; /* (t) User pri from estcpu and nice. */
285 u_char td_base_user_pri; /* (t) Base user pri */
286 #define td_endcopy td_pcb
287
288 /*
289 * Fields that must be manually set in fork1() or thread_sched_upcall()
290 * or already have been set in the allocator, constructor, etc.
291 */
292 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
293 enum {
294 TDS_INACTIVE = 0x0,
295 TDS_INHIBITED,
296 TDS_CAN_RUN,
297 TDS_RUNQ,
298 TDS_RUNNING
299 } td_state; /* (t) thread state */
300 register_t td_retval[2]; /* (k) Syscall aux returns. */
301 struct callout td_slpcallout; /* (h) Callout for sleep. */
302 struct trapframe *td_frame; /* (k) */
303 struct vm_object *td_kstack_obj;/* (a) Kstack object. */
304 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
305 int td_kstack_pages; /* (a) Size of the kstack. */
306 volatile u_int td_critnest; /* (k*) Critical section nest level. */
307 struct mdthread td_md; /* (k) Any machine-dependent fields. */
308 struct td_sched *td_sched; /* (*) Scheduler-specific data. */
309 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */
310 struct lpohead td_lprof[2]; /* (a) lock profiling objects. */
311 struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */
312 int td_errno; /* Error returned by last syscall. */
313 struct vnet *td_vnet; /* (k) Effective vnet. */
314 const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */
315 struct trapframe *td_intr_frame;/* (k) Frame of the current irq */
316 struct proc *td_rfppwait_p; /* (k) The vforked child */
317 struct vm_page **td_ma; /* (k) uio pages held */
318 int td_ma_cnt; /* (k) size of *td_ma */
319 struct rl_q_entry *td_rlqe; /* (k) Associated range lock entry. */
320 u_int td_vp_reserv; /* (k) Count of reserved vnodes. */
321 u_int td_dbg_sc_code; /* (c) Syscall code to debugger. */
322 u_int td_dbg_sc_narg; /* (c) Syscall arg count to debugger.*/
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_UNUSED09 0x00000200 /* --available-- */
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_NOLOAD 0x00040000 /* Ignore during load avg calculations. */
372 #define TDF_UNUSED19 0x00080000 /* --available-- */
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 #define TDB_FORK 0x00000040 /* TDB_SCX from fork(2) that created new
393 process */
394 #define TDB_STOPATFORK 0x00000080 /* Stop at the return from fork (child
395 only) */
396 #define TDB_CHILD 0x00000100 /* New child indicator for ptrace() */
397
398 /*
399 * "Private" flags kept in td_pflags:
400 * These are only written by curthread and thus need no locking.
401 */
402 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */
403 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */
404 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */
405 #define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */
406 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */
407 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */
408 #define TDP_DEADLKTREAT 0x00000040 /* Lock aquisition - deadlock treatment. */
409 #define TDP_NOFAULTING 0x00000080 /* Do not handle page faults. */
410 #define TDP_NOSLEEPING 0x00000100 /* Thread is not allowed to sleep on a sq. */
411 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */
412 #define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */
413 #define TDP_SYNCIO 0x00000800 /* Local override, disable async i/o. */
414 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */
415 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */
416 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */
417 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */
418 #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */
419 #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */
420 #define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */
421 #define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */
422 #define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */
423 #define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */
424 #define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */
425 #define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */
426 #define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */
427 #define TDP_RFPPWAIT 0x02000000 /* Handle RFPPWAIT on syscall exit */
428 #define TDP_RESETSPUR 0x04000000 /* Reset spurious page fault history. */
429 #define TDP_NERRNO 0x08000000 /* Last errno is already in td_errno */
430 #define TDP_UIOHELD 0x10000000 /* Current uio has pages held in td_ma */
431 #define TDP_DEVMEMIO 0x20000000 /* Accessing memory for /dev/mem */
432 #define TDP_EXECVMSPC 0x40000000 /* Execve destroyed old vmspace */
433
434 /*
435 * Reasons that the current thread can not be run yet.
436 * More than one may apply.
437 */
438 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */
439 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
440 #define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */
441 #define TDI_LOCK 0x0008 /* Stopped on a lock. */
442 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
443
444 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
445 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
446 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
447 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
448 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
449 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
450 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
451 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
452 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
453 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
454 #define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED)
455 #define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD)
456
457
458 #define TD_SET_INHIB(td, inhib) do { \
459 (td)->td_state = TDS_INHIBITED; \
460 (td)->td_inhibitors |= (inhib); \
461 } while (0)
462
463 #define TD_CLR_INHIB(td, inhib) do { \
464 if (((td)->td_inhibitors & (inhib)) && \
465 (((td)->td_inhibitors &= ~(inhib)) == 0)) \
466 (td)->td_state = TDS_CAN_RUN; \
467 } while (0)
468
469 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
470 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
471 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
472 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
473 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
474 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
475
476 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
477 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
478 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
479 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
480 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
481
482 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING
483 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ
484 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN
485
486 /*
487 * Process structure.
488 */
489 struct proc {
490 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
491 TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */
492 struct mtx p_slock; /* process spin lock */
493 struct ucred *p_ucred; /* (c) Process owner's identity. */
494 struct filedesc *p_fd; /* (b) Open files. */
495 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */
496 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
497 struct plimit *p_limit; /* (c) Process limits. */
498 struct callout p_limco; /* (c) Limit callout handle */
499 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */
500
501 int p_flag; /* (c) P_* flags. */
502 int p_flag2; /* (c) P2_* flags. */
503 enum {
504 PRS_NEW = 0, /* In creation */
505 PRS_NORMAL, /* threads can be run. */
506 PRS_ZOMBIE
507 } p_state; /* (j/c) Process status. */
508 pid_t p_pid; /* (b) Process identifier. */
509 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
510 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
511 struct proc *p_pptr; /* (c + e) Pointer to parent process. */
512 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
513 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
514 struct mtx p_mtx; /* (n) Lock for this struct. */
515 struct ksiginfo *p_ksi; /* Locked by parent proc lock */
516 sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */
517 #define p_siglist p_sigqueue.sq_signals
518
519 /* The following fields are all zeroed upon creation in fork. */
520 #define p_startzero p_oppid
521 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */
522 int p_pad_dbg_child;
523 struct vmspace *p_vmspace; /* (b) Address space. */
524 u_int p_swtick; /* (c) Tick when swapped in or out. */
525 struct itimerval p_realtimer; /* (c) Alarm timer. */
526 struct rusage p_ru; /* (a) Exit information. */
527 struct rusage_ext p_rux; /* (cj) Internal resource usage. */
528 struct rusage_ext p_crux; /* (c) Internal child resource usage. */
529 int p_profthreads; /* (c) Num threads in addupc_task. */
530 volatile int p_exitthreads; /* (j) Number of threads exiting */
531 int p_traceflag; /* (o) Kernel trace points. */
532 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */
533 struct ucred *p_tracecred; /* (o) Credentials to trace with. */
534 struct vnode *p_textvp; /* (b) Vnode of executable. */
535 u_int p_lock; /* (c) Proclock (prevent swap) count. */
536 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
537 int p_sigparent; /* (c) Signal to parent on exit. */
538 int p_sig; /* (n) For core dump/debugger XXX. */
539 u_long p_code; /* (n) For core dump/debugger XXX. */
540 u_int p_stops; /* (c) Stop event bitmask. */
541 u_int p_stype; /* (c) Stop event type. */
542 char p_step; /* (c) Process is stopped. */
543 u_char p_pfsflags; /* (c) Procfs flags. */
544 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
545 struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */
546 struct thread *p_singlethread;/* (c + j) If single threading this is it */
547 int p_suspcount; /* (j) Num threads in suspended mode. */
548 struct thread *p_xthread; /* (c) Trap thread */
549 int p_boundary_count;/* (j) Num threads at user boundary */
550 int p_pendingcnt; /* how many signals are pending */
551 struct itimers *p_itimers; /* (c) POSIX interval timers. */
552 struct procdesc *p_procdesc; /* (e) Process descriptor, if any. */
553 /* End area that is zeroed on creation. */
554 #define p_endzero p_magic
555
556 /* The following fields are all copied upon creation in fork. */
557 #define p_startcopy p_endzero
558 u_int p_magic; /* (b) Magic number. */
559 int p_osrel; /* (x) osreldate for the
560 binary (from ELF note, if any) */
561 char p_comm[MAXCOMLEN + 1]; /* (x) Process name. */
562 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
563 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
564 struct pargs *p_args; /* (c) Process arguments. */
565 rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */
566 signed char p_nice; /* (c) Process "nice" value. */
567 int p_fibnum; /* in this routing domain XXX MRT */
568 /* End area that is copied on creation. */
569 #define p_endcopy p_xstat
570
571 u_short p_xstat; /* (c) Exit status; also stop sig. */
572 struct knlist p_klist; /* (c) Knotes attached to this proc. */
573 int p_numthreads; /* (c) Number of threads. */
574 struct mdproc p_md; /* Any machine-dependent fields. */
575 struct callout p_itcallout; /* (h + c) Interval timer callout. */
576 u_short p_acflag; /* (c) Accounting flags. */
577 struct proc *p_peers; /* (r) */
578 struct proc *p_leader; /* (b) */
579 void *p_emuldata; /* (c) Emulator state data. */
580 struct label *p_label; /* (*) Proc (not subject) MAC label. */
581 struct p_sched *p_sched; /* (*) Scheduler-specific data. */
582 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */
583 LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/
584 struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */
585 struct cv p_pwait; /* (*) wait cv for exit/exec. */
586 struct cv p_dbgwait; /* (*) wait cv for debugger attach
587 after fork. */
588 uint64_t p_prev_runtime; /* (c) Resource usage accounting. */
589 struct racct *p_racct; /* (b) Resource accounting. */
590 /*
591 * An orphan is the child that has beed re-parented to the
592 * debugger as a result of attaching to it. Need to keep
593 * track of them for parent to be able to collect the exit
594 * status of what used to be children.
595 */
596 LIST_ENTRY(proc) p_orphan; /* (e) List of orphan processes. */
597 LIST_HEAD(, proc) p_orphans; /* (e) Pointer to list of orphans. */
598 u_char p_throttled; /* (c) Flag for racct pcpu throttling */
599 u_int p_treeflag; /* (e) P_TREE flags */
600 };
601
602 #define p_session p_pgrp->pg_session
603 #define p_pgid p_pgrp->pg_id
604
605 #define NOCPU 0xff /* For when we aren't on a CPU. */
606
607 #define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock)
608 #define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock)
609 #define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type))
610
611 /* These flags are kept in p_flag. */
612 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
613 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
614 #define P_KTHREAD 0x00004 /* Kernel thread (*). */
615 #define P_FOLLOWFORK 0x00008 /* Attach parent debugger to children. */
616 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
617 #define P_PROFIL 0x00020 /* Has started profiling. */
618 #define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */
619 #define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */
620 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
621 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
622 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */
623 #define P_TRACED 0x00800 /* Debugged process being traced. */
624 #define P_WAITED 0x01000 /* Someone is waiting for us. */
625 #define P_WEXIT 0x02000 /* Working on exiting. */
626 #define P_EXEC 0x04000 /* Process called exec. */
627 #define P_WKILLED 0x08000 /* Killed, go to kernel/user boundary ASAP. */
628 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
629 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */
630 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */
631 #define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */
632 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
633 #define P_SIGEVENT 0x200000 /* Process pending signals changed. */
634 #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */
635 #define P_HWPMC 0x800000 /* Process is using HWPMCs */
636 #define P_JAILED 0x1000000 /* Process is in jail. */
637 #define P_UNUSED1 0x2000000
638 #define P_INEXEC 0x4000000 /* Process is in execve(). */
639 #define P_STATCHILD 0x8000000 /* Child process stopped or exited. */
640 #define P_INMEM 0x10000000 /* Loaded into memory. */
641 #define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */
642 #define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */
643 #define P_PPTRACE 0x80000000 /* PT_TRACEME by vforked child. */
644
645 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
646 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
647 #define P_KILLED(p) ((p)->p_flag & P_WKILLED)
648
649 /* These flags are kept in p_flag2. */
650 #define P2_INHERIT_PROTECTED 0x00000001 /* New children get P_PROTECTED. */
651
652 /* Flags protected by proctree_lock, kept in p_treeflags. */
653 #define P_TREE_ORPHANED 0x00000001 /* Reparented, on orphan list */
654 #define P_TREE_FIRST_ORPHAN 0x00000002 /* First element of orphan
655 list */
656
657 /*
658 * These were process status values (p_stat), now they are only used in
659 * legacy conversion code.
660 */
661 #define SIDL 1 /* Process being created by fork. */
662 #define SRUN 2 /* Currently runnable. */
663 #define SSLEEP 3 /* Sleeping on an address. */
664 #define SSTOP 4 /* Process debugging or suspension. */
665 #define SZOMB 5 /* Awaiting collection by parent. */
666 #define SWAIT 6 /* Waiting for interrupt. */
667 #define SLOCK 7 /* Blocked on a lock. */
668
669 #define P_MAGIC 0xbeefface
670
671 #ifdef _KERNEL
672
673 /* Types and flags for mi_switch(). */
674 #define SW_TYPE_MASK 0xff /* First 8 bits are switch type */
675 #define SWT_NONE 0 /* Unspecified switch. */
676 #define SWT_PREEMPT 1 /* Switching due to preemption. */
677 #define SWT_OWEPREEMPT 2 /* Switching due to opepreempt. */
678 #define SWT_TURNSTILE 3 /* Turnstile contention. */
679 #define SWT_SLEEPQ 4 /* Sleepq wait. */
680 #define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */
681 #define SWT_RELINQUISH 6 /* yield call. */
682 #define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */
683 #define SWT_IDLE 8 /* Switching from the idle thread. */
684 #define SWT_IWAIT 9 /* Waiting for interrupts. */
685 #define SWT_SUSPEND 10 /* Thread suspended. */
686 #define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */
687 #define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */
688 #define SWT_COUNT 13 /* Number of switch types. */
689 /* Flags */
690 #define SW_VOL 0x0100 /* Voluntary switch. */
691 #define SW_INVOL 0x0200 /* Involuntary switch. */
692 #define SW_PREEMPT 0x0400 /* The invol switch is a preemption */
693
694 /* How values for thread_single(). */
695 #define SINGLE_NO_EXIT 0
696 #define SINGLE_EXIT 1
697 #define SINGLE_BOUNDARY 2
698
699 #ifdef MALLOC_DECLARE
700 MALLOC_DECLARE(M_PARGS);
701 MALLOC_DECLARE(M_PGRP);
702 MALLOC_DECLARE(M_SESSION);
703 MALLOC_DECLARE(M_SUBPROC);
704 #endif
705
706 #define FOREACH_PROC_IN_SYSTEM(p) \
707 LIST_FOREACH((p), &allproc, p_list)
708 #define FOREACH_THREAD_IN_PROC(p, td) \
709 TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
710
711 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads)
712
713 /*
714 * We use process IDs <= pid_max <= PID_MAX; PID_MAX + 1 must also fit
715 * in a pid_t, as it is used to represent "no process group".
716 */
717 #define PID_MAX 99999
718 #define NO_PID 100000
719 extern pid_t pid_max;
720
721 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
722
723
724 #define STOPEVENT(p, e, v) do { \
725 if ((p)->p_stops & (e)) { \
726 PROC_LOCK(p); \
727 stopevent((p), (e), (v)); \
728 PROC_UNLOCK(p); \
729 } \
730 } while (0)
731 #define _STOPEVENT(p, e, v) do { \
732 PROC_LOCK_ASSERT(p, MA_OWNED); \
733 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.lock_object, \
734 "checking stopevent %d", (e)); \
735 if ((p)->p_stops & (e)) \
736 stopevent((p), (e), (v)); \
737 } while (0)
738
739 /* Lock and unlock a process. */
740 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
741 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
742 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
743 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
744 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
745
746 /* Lock and unlock a process group. */
747 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
748 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
749 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
750 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
751
752 #define PGRP_LOCK_PGSIGNAL(pg) do { \
753 if ((pg) != NULL) \
754 PGRP_LOCK(pg); \
755 } while (0)
756 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \
757 if ((pg) != NULL) \
758 PGRP_UNLOCK(pg); \
759 } while (0)
760
761 /* Lock and unlock a session. */
762 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
763 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
764 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
765 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
766
767 /* Hold process U-area in memory, normally for ptrace/procfs work. */
768 #define PHOLD(p) do { \
769 PROC_LOCK(p); \
770 _PHOLD(p); \
771 PROC_UNLOCK(p); \
772 } while (0)
773 #define _PHOLD(p) do { \
774 PROC_LOCK_ASSERT((p), MA_OWNED); \
775 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \
776 ("PHOLD of exiting process")); \
777 (p)->p_lock++; \
778 if (((p)->p_flag & P_INMEM) == 0) \
779 faultin((p)); \
780 } while (0)
781 #define PROC_ASSERT_HELD(p) do { \
782 KASSERT((p)->p_lock > 0, ("process not held")); \
783 } while (0)
784
785 #define PRELE(p) do { \
786 PROC_LOCK((p)); \
787 _PRELE((p)); \
788 PROC_UNLOCK((p)); \
789 } while (0)
790 #define _PRELE(p) do { \
791 PROC_LOCK_ASSERT((p), MA_OWNED); \
792 PROC_ASSERT_HELD(p); \
793 (--(p)->p_lock); \
794 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \
795 wakeup(&(p)->p_lock); \
796 } while (0)
797 #define PROC_ASSERT_NOT_HELD(p) do { \
798 KASSERT((p)->p_lock == 0, ("process held")); \
799 } while (0)
800
801 /* Check whether a thread is safe to be swapped out. */
802 #define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP)
803
804 /* Control whether or not it is safe for curthread to sleep. */
805 #define THREAD_NO_SLEEPING() do { \
806 KASSERT(!(curthread->td_pflags & TDP_NOSLEEPING), \
807 ("nested no sleeping")); \
808 curthread->td_pflags |= TDP_NOSLEEPING; \
809 } while (0)
810
811 #define THREAD_SLEEPING_OK() do { \
812 KASSERT((curthread->td_pflags & TDP_NOSLEEPING), \
813 ("nested sleeping ok")); \
814 curthread->td_pflags &= ~TDP_NOSLEEPING; \
815 } while (0)
816
817 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
818 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
819 extern u_long pidhash;
820 #define TIDHASH(tid) (&tidhashtbl[(tid) & tidhash])
821 extern LIST_HEAD(tidhashhead, thread) *tidhashtbl;
822 extern u_long tidhash;
823 extern struct rwlock tidhash_lock;
824
825 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
826 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
827 extern u_long pgrphash;
828
829 extern struct sx allproc_lock;
830 extern struct sx proctree_lock;
831 extern struct mtx ppeers_lock;
832 extern struct proc proc0; /* Process slot for swapper. */
833 extern struct thread thread0; /* Primary thread in proc0. */
834 extern struct vmspace vmspace0; /* VM space for proc0. */
835 extern int hogticks; /* Limit on kernel cpu hogs. */
836 extern int lastpid;
837 extern int nprocs, maxproc; /* Current and max number of procs. */
838 extern int maxprocperuid; /* Max procs per uid. */
839 extern u_long ps_arg_cache_limit;
840
841 LIST_HEAD(proclist, proc);
842 TAILQ_HEAD(procqueue, proc);
843 TAILQ_HEAD(threadqueue, thread);
844 extern struct proclist allproc; /* List of all processes. */
845 extern struct proclist zombproc; /* List of zombie processes. */
846 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
847
848 extern struct uma_zone *proc_zone;
849
850 struct proc *pfind(pid_t); /* Find process by id. */
851 struct proc *pfind_locked(pid_t pid);
852 struct pgrp *pgfind(pid_t); /* Find process group by id. */
853 struct proc *zpfind(pid_t); /* Find zombie process by id. */
854
855 /*
856 * pget() flags.
857 */
858 #define PGET_HOLD 0x00001 /* Hold the process. */
859 #define PGET_CANSEE 0x00002 /* Check against p_cansee(). */
860 #define PGET_CANDEBUG 0x00004 /* Check against p_candebug(). */
861 #define PGET_ISCURRENT 0x00008 /* Check that the found process is current. */
862 #define PGET_NOTWEXIT 0x00010 /* Check that the process is not in P_WEXIT. */
863 #define PGET_NOTINEXEC 0x00020 /* Check that the process is not in P_INEXEC. */
864 #define PGET_NOTID 0x00040 /* Do not assume tid if pid > PID_MAX. */
865
866 #define PGET_WANTREAD (PGET_HOLD | PGET_CANDEBUG | PGET_NOTWEXIT)
867
868 int pget(pid_t pid, int flags, struct proc **pp);
869
870 void ast(struct trapframe *framep);
871 struct thread *choosethread(void);
872 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
873 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp,
874 struct session *sess);
875 int enterthispgrp(struct proc *p, struct pgrp *pgrp);
876 void faultin(struct proc *p);
877 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
878 int fork1(struct thread *, int, int, struct proc **, int *, int);
879 void fork_exit(void (*)(void *, struct trapframe *), void *,
880 struct trapframe *);
881 void fork_return(struct thread *, struct trapframe *);
882 int inferior(struct proc *p);
883 void kern_yield(int);
884 void kick_proc0(void);
885 int leavepgrp(struct proc *p);
886 int maybe_preempt(struct thread *td);
887 void maybe_yield(void);
888 void mi_switch(int flags, struct thread *newtd);
889 int p_candebug(struct thread *td, struct proc *p);
890 int p_cansee(struct thread *td, struct proc *p);
891 int p_cansched(struct thread *td, struct proc *p);
892 int p_cansignal(struct thread *td, struct proc *p, int signum);
893 int p_canwait(struct thread *td, struct proc *p);
894 struct pargs *pargs_alloc(int len);
895 void pargs_drop(struct pargs *pa);
896 void pargs_hold(struct pargs *pa);
897 int proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb);
898 int proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb);
899 int proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb);
900 void procinit(void);
901 void proc_linkup0(struct proc *p, struct thread *td);
902 void proc_linkup(struct proc *p, struct thread *td);
903 struct proc *proc_realparent(struct proc *child);
904 void proc_reap(struct thread *td, struct proc *p, int *status, int options);
905 void proc_reparent(struct proc *child, struct proc *newparent);
906 struct pstats *pstats_alloc(void);
907 void pstats_fork(struct pstats *src, struct pstats *dst);
908 void pstats_free(struct pstats *ps);
909 int securelevel_ge(struct ucred *cr, int level);
910 int securelevel_gt(struct ucred *cr, int level);
911 void sess_hold(struct session *);
912 void sess_release(struct session *);
913 int setrunnable(struct thread *);
914 void setsugid(struct proc *p);
915 int should_yield(void);
916 int sigonstack(size_t sp);
917 void sleepinit(void);
918 void stopevent(struct proc *, u_int, u_int);
919 struct thread *tdfind(lwpid_t, pid_t);
920 void threadinit(void);
921 void tidhash_add(struct thread *);
922 void tidhash_remove(struct thread *);
923 void cpu_idle(int);
924 int cpu_idle_wakeup(int);
925 extern void (*cpu_idle_hook)(void); /* Hook to machdep CPU idler. */
926 void cpu_switch(struct thread *, struct thread *, struct mtx *);
927 void cpu_throw(struct thread *, struct thread *) __dead2;
928 void unsleep(struct thread *);
929 void userret(struct thread *, struct trapframe *);
930
931 void cpu_exit(struct thread *);
932 void exit1(struct thread *, int) __dead2;
933 int cpu_fetch_syscall_args(struct thread *td, struct syscall_args *sa);
934 void cpu_fork(struct thread *, struct proc *, struct thread *, int);
935 void cpu_set_fork_handler(struct thread *, void (*)(void *), void *);
936 void cpu_set_syscall_retval(struct thread *, int);
937 void cpu_set_upcall(struct thread *td, struct thread *td0);
938 void cpu_set_upcall_kse(struct thread *, void (*)(void *), void *,
939 stack_t *);
940 int cpu_set_user_tls(struct thread *, void *tls_base);
941 void cpu_thread_alloc(struct thread *);
942 void cpu_thread_clean(struct thread *);
943 void cpu_thread_exit(struct thread *);
944 void cpu_thread_free(struct thread *);
945 void cpu_thread_swapin(struct thread *);
946 void cpu_thread_swapout(struct thread *);
947 struct thread *thread_alloc(int pages);
948 int thread_alloc_stack(struct thread *, int pages);
949 void thread_exit(void) __dead2;
950 void thread_free(struct thread *td);
951 void thread_link(struct thread *td, struct proc *p);
952 void thread_reap(void);
953 int thread_single(int how);
954 void thread_single_end(void);
955 void thread_stash(struct thread *td);
956 void thread_stopped(struct proc *p);
957 void childproc_stopped(struct proc *child, int reason);
958 void childproc_continued(struct proc *child);
959 void childproc_exited(struct proc *child);
960 int thread_suspend_check(int how);
961 void thread_suspend_switch(struct thread *);
962 void thread_suspend_one(struct thread *td);
963 void thread_unlink(struct thread *td);
964 void thread_unsuspend(struct proc *p);
965 int thread_unsuspend_one(struct thread *td);
966 void thread_unthread(struct thread *td);
967 void thread_wait(struct proc *p);
968 struct thread *thread_find(struct proc *p, lwpid_t tid);
969
970 static __inline int
curthread_pflags_set(int flags)971 curthread_pflags_set(int flags)
972 {
973 struct thread *td;
974 int save;
975
976 td = curthread;
977 save = ~flags | (td->td_pflags & flags);
978 td->td_pflags |= flags;
979 return (save);
980 }
981
982 static __inline void
curthread_pflags_restore(int save)983 curthread_pflags_restore(int save)
984 {
985
986 curthread->td_pflags &= save;
987 }
988
989 #endif /* _KERNEL */
990
991 #endif /* !_SYS_PROC_H_ */
992