2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1986, 1989, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
6 * (c) UNIX System Laboratories, Inc.
7 * All or some portions of this file are derived from material licensed
8 * to the University of California by American Telephone and Telegraph
9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
10 * the permission of UNIX System Laboratories, Inc.
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)proc.h 8.15 (Berkeley) 5/19/95
43 #include <sys/callout.h> /* For struct callout. */
44 #include <sys/event.h> /* For struct klist. */
45 #include <sys/condvar.h>
47 #include <sys/filedesc.h>
49 #include <sys/queue.h>
50 #include <sys/_lock.h>
51 #include <sys/lock_profile.h>
52 #include <sys/_mutex.h>
54 #include <sys/priority.h>
55 #include <sys/rtprio.h> /* XXX. */
57 #include <sys/resource.h>
58 #include <sys/sigio.h>
59 #include <sys/signal.h>
60 #include <sys/signalvar.h>
62 #include <sys/time.h> /* For structs itimerval, timeval. */
65 #include <sys/systm.h>
67 #include <sys/ucontext.h>
68 #include <sys/ucred.h>
69 #include <sys/types.h>
70 #include <sys/_domainset.h>
72 #include <machine/proc.h> /* Machine-dependent proc substruct. */
74 #include <machine/cpu.h>
78 * One structure allocated per session.
81 * (m) locked by s_mtx mtx
82 * (e) locked by proctree_lock sx
83 * (c) const until freeing
86 u_int s_count; /* Ref cnt; pgrps in session - atomic. */
87 struct proc *s_leader; /* (m + e) Session leader. */
88 struct vnode *s_ttyvp; /* (m) Vnode of controlling tty. */
89 struct cdev_priv *s_ttydp; /* (m) Device of controlling tty. */
90 struct tty *s_ttyp; /* (e) Controlling tty. */
91 pid_t s_sid; /* (c) Session ID. */
92 /* (m) Setlogin() name: */
93 char s_login[roundup(MAXLOGNAME, sizeof(long))];
94 struct mtx s_mtx; /* Mutex to protect members. */
98 * One structure allocated per process group.
101 * (m) locked by pg_mtx mtx
102 * (e) locked by proctree_lock sx
103 * (c) const until freeing
106 LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */
107 LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */
108 struct session *pg_session; /* (c) Pointer to session. */
109 struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */
110 pid_t pg_id; /* (c) Process group id. */
111 int pg_jobc; /* (m) Job control process count. */
112 struct mtx pg_mtx; /* Mutex to protect members */
116 * pargs, used to hold a copy of the command line, if it had a sane length.
119 u_int ar_ref; /* Reference count. */
120 u_int ar_length; /* Length. */
121 u_char ar_args[1]; /* Arguments. */
125 * Description of a process.
127 * This structure contains the information needed to manage a thread of
128 * control, known in UN*X as a process; it has references to substructures
129 * containing descriptions of things that the process uses, but may share
130 * with related processes. The process structure and the substructures
131 * are always addressable except for those marked "(CPU)" below,
132 * which might be addressable only on a processor on which the process
135 * Below is a key of locks used to protect each member of struct proc. The
136 * lock is indicated by a reference to a specific character in parens in the
137 * associated comment.
138 * * - not yet protected
139 * a - only touched by curproc or parent during fork/wait
140 * b - created at fork, never changes
141 * (exception aiods switch vmspaces, but they are also
142 * marked 'P_SYSTEM' so hopefully it will be left alone)
143 * c - locked by proc mtx
144 * d - locked by allproc_lock lock
145 * e - locked by proctree_lock lock
147 * g - process group mtx
148 * h - callout_lock mtx
149 * i - by curproc or the master session mtx
150 * j - locked by proc slock
151 * k - only accessed by curthread
152 * k*- only accessed by curthread and from an interrupt
153 * kx- only accessed by curthread and by debugger
154 * l - the attaching proc or attaching proc parent
156 * n - not locked, lazy
158 * q - td_contested lock
160 * s - see sleepq_switch(), sleeping_on_old_rtc(), and sleep(9)
162 * u - process stat lock
163 * w - process timer lock
164 * x - created at fork, only changes during single threading in exec
165 * y - created at first aio, doesn't change until exit or exec at which
166 * point we are single-threaded and only curthread changes it
167 * z - zombie threads lock
169 * If the locking key specifies two identifiers (for example, p_pptr) then
170 * either lock is sufficient for read access, but both locks must be held
177 struct kaudit_record;
179 struct kdtrace_thread;
180 struct mqueue_notifier;
196 struct epoch_tracker;
199 * XXX: Does this belong in resource.h or resourcevar.h instead?
200 * Resource usage extension. The times in rusage structs in the kernel are
201 * never up to date. The actual times are kept as runtimes and tick counts
202 * (with control info in the "previous" times), and are converted when
203 * userland asks for rusage info. Backwards compatibility prevents putting
204 * this directly in the user-visible rusage struct.
206 * Locking for p_rux: (cu) means (u) for p_rux and (c) for p_crux.
207 * Locking for td_rux: (t) for all fields.
210 uint64_t rux_runtime; /* (cu) Real time. */
211 uint64_t rux_uticks; /* (cu) Statclock hits in user mode. */
212 uint64_t rux_sticks; /* (cu) Statclock hits in sys mode. */
213 uint64_t rux_iticks; /* (cu) Statclock hits in intr mode. */
214 uint64_t rux_uu; /* (c) Previous user time in usec. */
215 uint64_t rux_su; /* (c) Previous sys time in usec. */
216 uint64_t rux_tu; /* (c) Previous total time in usec. */
220 * Kernel runnable context (thread).
221 * This is what is put to sleep and reactivated.
222 * Thread context. Processes may have multiple threads.
225 struct mtx *volatile td_lock; /* replaces sched lock */
226 struct proc *td_proc; /* (*) Associated process. */
227 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */
228 TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */
229 TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */
230 TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */
231 LIST_ENTRY(thread) td_hash; /* (d) Hash chain. */
232 struct cpuset *td_cpuset; /* (t) CPU affinity mask. */
233 struct domainset_ref td_domain; /* (a) NUMA policy */
234 struct seltd *td_sel; /* Select queue/channel. */
235 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */
236 struct turnstile *td_turnstile; /* (k) Associated turnstile. */
237 struct rl_q_entry *td_rlqe; /* (k) Associated range lock entry. */
238 struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */
239 lwpid_t td_tid; /* (b) Thread ID. */
240 sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */
241 #define td_siglist td_sigqueue.sq_signals
242 u_char td_lend_user_pri; /* (t) Lend user pri. */
244 /* Cleared during fork1() */
245 #define td_startzero td_epochnest
246 u_char td_epochnest; /* (k) Epoch nest counter. */
247 int td_flags; /* (t) TDF_* flags. */
248 int td_inhibitors; /* (t) Why can not run. */
249 int td_pflags; /* (k) Private thread (TDP_*) flags. */
250 int td_dupfd; /* (k) Ret value from fdopen. XXX */
251 int td_sqqueue; /* (t) Sleepqueue queue blocked on. */
252 void *td_wchan; /* (t) Sleep address. */
253 const char *td_wmesg; /* (t) Reason for sleep. */
254 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */
255 u_char td_tsqueue; /* (t) Turnstile queue blocked on. */
256 short td_locks; /* (k) Debug: count of non-spin locks */
257 short td_rw_rlocks; /* (k) Count of rwlock read locks. */
258 short td_sx_slocks; /* (k) Count of sx shared locks. */
259 short td_lk_slocks; /* (k) Count of lockmgr shared locks. */
260 short td_stopsched; /* (k) Scheduler stopped. */
261 struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */
262 const char *td_lockname; /* (t) Name of lock blocked on. */
263 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */
264 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
265 int td_intr_nesting_level; /* (k) Interrupt recursion. */
266 int td_pinned; /* (k) Temporary cpu pin count. */
267 struct ucred *td_ucred; /* (k) Reference to credentials. */
268 struct plimit *td_limit; /* (k) Resource limits. */
269 int td_slptick; /* (t) Time at sleep. */
270 int td_blktick; /* (t) Time spent blocked. */
271 int td_swvoltick; /* (t) Time at last SW_VOL switch. */
272 int td_swinvoltick; /* (t) Time at last SW_INVOL switch. */
273 u_int td_cow; /* (*) Number of copy-on-write faults */
274 struct rusage td_ru; /* (t) rusage information. */
275 struct rusage_ext td_rux; /* (t) Internal rusage information. */
276 uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */
277 uint64_t td_runtime; /* (t) How many cpu ticks we've run. */
278 u_int td_pticks; /* (t) Statclock hits for profiling */
279 u_int td_sticks; /* (t) Statclock hits in system mode. */
280 u_int td_iticks; /* (t) Statclock hits in intr mode. */
281 u_int td_uticks; /* (t) Statclock hits in user mode. */
282 int td_intrval; /* (t) Return value for sleepq. */
283 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */
284 volatile u_int td_generation; /* (k) For detection of preemption */
285 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */
286 int td_xsig; /* (c) Signal for ptrace */
287 u_long td_profil_addr; /* (k) Temporary addr until AST. */
288 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */
289 char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */
290 struct file *td_fpop; /* (k) file referencing cdev under op */
291 int td_dbgflags; /* (c) Userland debugger flags */
292 siginfo_t td_si; /* (c) For debugger or core file */
293 int td_ng_outbound; /* (k) Thread entered ng from above. */
294 struct osd td_osd; /* (k) Object specific data. */
295 struct vm_map_entry *td_map_def_user; /* (k) Deferred entries. */
296 pid_t td_dbg_forked; /* (c) Child pid for debugger. */
297 u_int td_vp_reserv; /* (k) Count of reserved vnodes. */
298 int td_no_sleeping; /* (k) Sleeping disabled count. */
299 void *td_su; /* (k) FFS SU private */
300 sbintime_t td_sleeptimo; /* (t) Sleep timeout. */
301 int td_rtcgen; /* (s) rtc_generation of abs. sleep */
302 size_t td_vslock_sz; /* (k) amount of vslock-ed space */
303 #define td_endzero td_sigmask
305 /* Copied during fork1() or create_thread(). */
306 #define td_startcopy td_endzero
307 sigset_t td_sigmask; /* (c) Current signal mask. */
308 u_char td_rqindex; /* (t) Run queue index. */
309 u_char td_base_pri; /* (t) Thread base kernel priority. */
310 u_char td_priority; /* (t) Thread active priority. */
311 u_char td_pri_class; /* (t) Scheduling class. */
312 u_char td_user_pri; /* (t) User pri from estcpu and nice. */
313 u_char td_base_user_pri; /* (t) Base user pri */
314 u_char td_pre_epoch_prio; /* (k) User pri on entry to epoch */
315 uintptr_t td_rb_list; /* (k) Robust list head. */
316 uintptr_t td_rbp_list; /* (k) Robust priv list head. */
317 uintptr_t td_rb_inact; /* (k) Current in-action mutex loc. */
318 struct syscall_args td_sa; /* (kx) Syscall parameters. Copied on
319 fork for child tracing. */
320 #define td_endcopy td_pcb
323 * Fields that must be manually set in fork1() or create_thread()
324 * or already have been set in the allocator, constructor, etc.
326 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
333 } td_state; /* (t) thread state */
335 register_t tdu_retval[2];
337 } td_uretoff; /* (k) Syscall aux returns. */
338 #define td_retval td_uretoff.tdu_retval
339 u_int td_cowgen; /* (k) Generation of COW pointers. */
341 struct callout td_slpcallout; /* (h) Callout for sleep. */
342 struct trapframe *td_frame; /* (k) */
343 struct vm_object *td_kstack_obj;/* (a) Kstack object. */
344 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
345 int td_kstack_pages; /* (a) Size of the kstack. */
346 volatile u_int td_critnest; /* (k*) Critical section nest level. */
347 struct mdthread td_md; /* (k) Any machine-dependent fields. */
348 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */
349 struct lpohead td_lprof[2]; /* (a) lock profiling objects. */
350 struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */
351 int td_errno; /* Error returned by last syscall. */
353 struct vnet *td_vnet; /* (k) Effective vnet. */
354 const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */
355 struct trapframe *td_intr_frame;/* (k) Frame of the current irq */
356 struct proc *td_rfppwait_p; /* (k) The vforked child */
357 struct vm_page **td_ma; /* (k) uio pages held */
358 int td_ma_cnt; /* (k) size of *td_ma */
360 void *td_emuldata; /* Emulator state data */
361 int td_lastcpu; /* (t) Last cpu we were on. */
362 int td_oncpu; /* (t) Which cpu we are on. */
363 void *td_lkpi_task; /* LinuxKPI task struct pointer */
364 struct epoch_tracker *td_et; /* (k) compat KPI spare tracker */
368 struct thread0_storage {
369 struct thread t0st_thread;
370 uint64_t t0st_sched[10];
373 struct mtx *thread_lock_block(struct thread *);
374 void thread_lock_unblock(struct thread *, struct mtx *);
375 void thread_lock_set(struct thread *, struct mtx *);
376 #define THREAD_LOCK_ASSERT(td, type) \
378 struct mtx *__m = (td)->td_lock; \
379 if (__m != &blocked_lock) \
380 mtx_assert(__m, (type)); \
384 #define THREAD_LOCKPTR_ASSERT(td, lock) \
386 struct mtx *__m = (td)->td_lock; \
387 KASSERT((__m == &blocked_lock || __m == (lock)), \
388 ("Thread %p lock %p does not match %p", td, __m, (lock))); \
391 #define TD_LOCKS_INC(td) ((td)->td_locks++)
392 #define TD_LOCKS_DEC(td) do { \
393 KASSERT(SCHEDULER_STOPPED_TD(td) || (td)->td_locks > 0, \
394 ("thread %p owns no locks", (td))); \
398 #define THREAD_LOCKPTR_ASSERT(td, lock)
400 #define TD_LOCKS_INC(td)
401 #define TD_LOCKS_DEC(td)
405 * Flags kept in td_flags:
406 * To change these you MUST have the scheduler lock.
408 #define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */
409 #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */
410 #define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */
411 #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */
412 #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */
413 #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */
414 #define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */
415 #define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */
416 #define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */
417 #define TDF_ALLPROCSUSP 0x00000200 /* suspended by SINGLE_ALLPROC */
418 #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */
419 #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */
420 #define TDF_UNUSED12 0x00001000 /* --available-- */
421 #define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */
422 #define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */
423 #define TDF_NEEDSUSPCHK 0x00008000 /* Thread may need to suspend. */
424 #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */
425 #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */
426 #define TDF_NOLOAD 0x00040000 /* Ignore during load avg calculations. */
427 #define TDF_SERESTART 0x00080000 /* ERESTART on stop attempts. */
428 #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */
429 #define TDF_SEINTR 0x00200000 /* EINTR on stop attempts. */
430 #define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */
431 #define TDF_UNUSED23 0x00800000 /* --available-- */
432 #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */
433 #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */
434 #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */
435 #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */
436 #define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */
437 #define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */
438 #define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */
440 /* Userland debug flags */
441 #define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */
442 #define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */
443 #define TDB_USERWR 0x00000004 /* Debugger modified memory or registers */
444 #define TDB_SCE 0x00000008 /* Thread performs syscall enter */
445 #define TDB_SCX 0x00000010 /* Thread performs syscall exit */
446 #define TDB_EXEC 0x00000020 /* TDB_SCX from exec(2) family */
447 #define TDB_FORK 0x00000040 /* TDB_SCX from fork(2) that created new
449 #define TDB_STOPATFORK 0x00000080 /* Stop at the return from fork (child
451 #define TDB_CHILD 0x00000100 /* New child indicator for ptrace() */
452 #define TDB_BORN 0x00000200 /* New LWP indicator for ptrace() */
453 #define TDB_EXIT 0x00000400 /* Exiting LWP indicator for ptrace() */
454 #define TDB_VFORK 0x00000800 /* vfork indicator for ptrace() */
455 #define TDB_FSTP 0x00001000 /* The thread is PT_ATTACH leader */
456 #define TDB_STEP 0x00002000 /* (x86) PSL_T set for PT_STEP */
459 * "Private" flags kept in td_pflags:
460 * These are only written by curthread and thus need no locking.
462 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */
463 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */
464 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */
465 #define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */
466 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */
467 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */
468 #define TDP_DEADLKTREAT 0x00000040 /* Lock acquisition - deadlock treatment. */
469 #define TDP_NOFAULTING 0x00000080 /* Do not handle page faults. */
470 #define TDP_UNUSED9 0x00000100 /* --available-- */
471 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */
472 #define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */
473 #define TDP_SYNCIO 0x00000800 /* Local override, disable async i/o. */
474 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */
475 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */
476 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */
477 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */
478 #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */
479 #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */
480 #define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */
481 #define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */
482 #define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */
483 #define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */
484 #define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */
485 #define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */
486 #define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */
487 #define TDP_RFPPWAIT 0x02000000 /* Handle RFPPWAIT on syscall exit */
488 #define TDP_RESETSPUR 0x04000000 /* Reset spurious page fault history. */
489 #define TDP_NERRNO 0x08000000 /* Last errno is already in td_errno */
490 #define TDP_UIOHELD 0x10000000 /* Current uio has pages held in td_ma */
491 #define TDP_FORKING 0x20000000 /* Thread is being created through fork() */
492 #define TDP_EXECVMSPC 0x40000000 /* Execve destroyed old vmspace */
495 * Reasons that the current thread can not be run yet.
496 * More than one may apply.
498 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */
499 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
500 #define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */
501 #define TDI_LOCK 0x0008 /* Stopped on a lock. */
502 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
504 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
505 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
506 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
507 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
508 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
509 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
510 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
511 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
512 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
513 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
514 #define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED)
515 #define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD)
517 #define KTDSTATE(td) \
518 (((td)->td_inhibitors & TDI_SLEEPING) != 0 ? "sleep" : \
519 ((td)->td_inhibitors & TDI_SUSPENDED) != 0 ? "suspended" : \
520 ((td)->td_inhibitors & TDI_SWAPPED) != 0 ? "swapped" : \
521 ((td)->td_inhibitors & TDI_LOCK) != 0 ? "blocked" : \
522 ((td)->td_inhibitors & TDI_IWAIT) != 0 ? "iwait" : "yielding")
524 #define TD_SET_INHIB(td, inhib) do { \
525 (td)->td_state = TDS_INHIBITED; \
526 (td)->td_inhibitors |= (inhib); \
529 #define TD_CLR_INHIB(td, inhib) do { \
530 if (((td)->td_inhibitors & (inhib)) && \
531 (((td)->td_inhibitors &= ~(inhib)) == 0)) \
532 (td)->td_state = TDS_CAN_RUN; \
535 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
536 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
537 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
538 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
539 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
540 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
542 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
543 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
544 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
545 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
546 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
548 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING
549 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ
550 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN
552 #define TD_SBDRY_INTR(td) \
553 (((td)->td_flags & (TDF_SEINTR | TDF_SERESTART)) != 0)
554 #define TD_SBDRY_ERRNO(td) \
555 (((td)->td_flags & TDF_SEINTR) != 0 ? EINTR : ERESTART)
561 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
562 TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */
563 struct mtx p_slock; /* process spin lock */
564 struct ucred *p_ucred; /* (c) Process owner's identity. */
565 struct filedesc *p_fd; /* (b) Open files. */
566 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */
567 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
568 struct plimit *p_limit; /* (c) Resource limits. */
569 struct callout p_limco; /* (c) Limit callout handle */
570 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */
572 int p_flag; /* (c) P_* flags. */
573 int p_flag2; /* (c) P2_* flags. */
575 PRS_NEW = 0, /* In creation */
576 PRS_NORMAL, /* threads can be run. */
578 } p_state; /* (j/c) Process status. */
579 pid_t p_pid; /* (b) Process identifier. */
580 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
581 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
582 struct proc *p_pptr; /* (c + e) Pointer to parent process. */
583 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
584 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
585 struct proc *p_reaper; /* (e) My reaper. */
586 LIST_HEAD(, proc) p_reaplist; /* (e) List of my descendants
588 LIST_ENTRY(proc) p_reapsibling; /* (e) List of siblings - descendants of
590 struct mtx p_mtx; /* (n) Lock for this struct. */
591 struct mtx p_statmtx; /* Lock for the stats */
592 struct mtx p_itimmtx; /* Lock for the virt/prof timers */
593 struct mtx p_profmtx; /* Lock for the profiling */
594 struct ksiginfo *p_ksi; /* Locked by parent proc lock */
595 sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */
596 #define p_siglist p_sigqueue.sq_signals
597 pid_t p_oppid; /* (c + e) Real parent pid. */
599 /* The following fields are all zeroed upon creation in fork. */
600 #define p_startzero p_vmspace
601 struct vmspace *p_vmspace; /* (b) Address space. */
602 u_int p_swtick; /* (c) Tick when swapped in or out. */
603 u_int p_cowgen; /* (c) Generation of COW pointers. */
604 struct itimerval p_realtimer; /* (c) Alarm timer. */
605 struct rusage p_ru; /* (a) Exit information. */
606 struct rusage_ext p_rux; /* (cu) Internal resource usage. */
607 struct rusage_ext p_crux; /* (c) Internal child resource usage. */
608 int p_profthreads; /* (c) Num threads in addupc_task. */
609 volatile int p_exitthreads; /* (j) Number of threads exiting */
610 int p_traceflag; /* (o) Kernel trace points. */
611 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */
612 struct ucred *p_tracecred; /* (o) Credentials to trace with. */
613 struct vnode *p_textvp; /* (b) Vnode of executable. */
614 u_int p_lock; /* (c) Proclock (prevent swap) count. */
615 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
616 int p_sigparent; /* (c) Signal to parent on exit. */
617 int p_sig; /* (n) For core dump/debugger XXX. */
618 u_long p_code; /* (n) For core dump/debugger XXX. */
619 u_int p_stops; /* (c) Stop event bitmask. */
620 u_int p_stype; /* (c) Stop event type. */
621 char p_step; /* (c) Process is stopped. */
622 u_char p_pfsflags; /* (c) Procfs flags. */
623 u_int p_ptevents; /* (c + e) ptrace() event mask. */
624 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
625 struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */
626 struct thread *p_singlethread;/* (c + j) If single threading this is it */
627 int p_suspcount; /* (j) Num threads in suspended mode. */
628 struct thread *p_xthread; /* (c) Trap thread */
629 int p_boundary_count;/* (j) Num threads at user boundary */
630 int p_pendingcnt; /* how many signals are pending */
631 struct itimers *p_itimers; /* (c) POSIX interval timers. */
632 struct procdesc *p_procdesc; /* (e) Process descriptor, if any. */
633 u_int p_treeflag; /* (e) P_TREE flags */
634 int p_pendingexits; /* (c) Count of pending thread exits. */
635 struct filemon *p_filemon; /* (c) filemon-specific data. */
636 int p_pdeathsig; /* (c) Signal from parent on exit. */
637 /* End area that is zeroed on creation. */
638 #define p_endzero p_magic
640 /* The following fields are all copied upon creation in fork. */
641 #define p_startcopy p_endzero
642 u_int p_magic; /* (b) Magic number. */
643 int p_osrel; /* (x) osreldate for the
644 binary (from ELF note, if any) */
645 uint32_t p_fctl0; /* (x) ABI feature control, ELF note */
646 char p_comm[MAXCOMLEN + 1]; /* (x) Process name. */
647 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
648 struct pargs *p_args; /* (c) Process arguments. */
649 rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */
650 signed char p_nice; /* (c) Process "nice" value. */
651 int p_fibnum; /* in this routing domain XXX MRT */
652 pid_t p_reapsubtree; /* (e) Pid of the direct child of the
655 uint16_t p_elf_machine; /* (x) ELF machine type */
656 uint64_t p_elf_flags; /* (x) ELF flags */
657 /* End area that is copied on creation. */
658 #define p_endcopy p_xexit
660 u_int p_xexit; /* (c) Exit code. */
661 u_int p_xsig; /* (c) Stop/kill sig. */
662 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
663 struct knlist *p_klist; /* (c) Knotes attached to this proc. */
664 int p_numthreads; /* (c) Number of threads. */
665 struct mdproc p_md; /* Any machine-dependent fields. */
666 struct callout p_itcallout; /* (h + c) Interval timer callout. */
667 u_short p_acflag; /* (c) Accounting flags. */
668 struct proc *p_peers; /* (r) */
669 struct proc *p_leader; /* (b) */
670 void *p_emuldata; /* (c) Emulator state data. */
671 struct label *p_label; /* (*) Proc (not subject) MAC label. */
672 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */
673 LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/
674 struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */
675 struct cv p_pwait; /* (*) wait cv for exit/exec. */
676 uint64_t p_prev_runtime; /* (c) Resource usage accounting. */
677 struct racct *p_racct; /* (b) Resource accounting. */
678 int p_throttled; /* (c) Flag for racct pcpu throttling */
680 * An orphan is the child that has been re-parented to the
681 * debugger as a result of attaching to it. Need to keep
682 * track of them for parent to be able to collect the exit
683 * status of what used to be children.
685 LIST_ENTRY(proc) p_orphan; /* (e) List of orphan processes. */
686 LIST_HEAD(, proc) p_orphans; /* (e) Pointer to list of orphans. */
689 #define p_session p_pgrp->pg_session
690 #define p_pgid p_pgrp->pg_id
692 #define NOCPU (-1) /* For when we aren't on a CPU. */
693 #define NOCPU_OLD (255)
694 #define MAXCPU_OLD (254)
696 #define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock)
697 #define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock)
698 #define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type))
700 #define PROC_STATLOCK(p) mtx_lock_spin(&(p)->p_statmtx)
701 #define PROC_STATUNLOCK(p) mtx_unlock_spin(&(p)->p_statmtx)
702 #define PROC_STATLOCK_ASSERT(p, type) mtx_assert(&(p)->p_statmtx, (type))
704 #define PROC_ITIMLOCK(p) mtx_lock_spin(&(p)->p_itimmtx)
705 #define PROC_ITIMUNLOCK(p) mtx_unlock_spin(&(p)->p_itimmtx)
706 #define PROC_ITIMLOCK_ASSERT(p, type) mtx_assert(&(p)->p_itimmtx, (type))
708 #define PROC_PROFLOCK(p) mtx_lock_spin(&(p)->p_profmtx)
709 #define PROC_PROFUNLOCK(p) mtx_unlock_spin(&(p)->p_profmtx)
710 #define PROC_PROFLOCK_ASSERT(p, type) mtx_assert(&(p)->p_profmtx, (type))
712 /* These flags are kept in p_flag. */
713 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
714 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
715 #define P_KPROC 0x00004 /* Kernel process. */
716 #define P_UNUSED3 0x00008 /* --available-- */
717 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
718 #define P_PROFIL 0x00020 /* Has started profiling. */
719 #define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */
720 #define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */
721 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
722 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
723 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */
724 #define P_TRACED 0x00800 /* Debugged process being traced. */
725 #define P_WAITED 0x01000 /* Someone is waiting for us. */
726 #define P_WEXIT 0x02000 /* Working on exiting. */
727 #define P_EXEC 0x04000 /* Process called exec. */
728 #define P_WKILLED 0x08000 /* Killed, go to kernel/user boundary ASAP. */
729 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
730 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */
731 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */
732 #define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */
733 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
734 #define P_SIGEVENT 0x200000 /* Process pending signals changed. */
735 #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */
736 #define P_HWPMC 0x800000 /* Process is using HWPMCs */
737 #define P_JAILED 0x1000000 /* Process is in jail. */
738 #define P_TOTAL_STOP 0x2000000 /* Stopped in stop_all_proc. */
739 #define P_INEXEC 0x4000000 /* Process is in execve(). */
740 #define P_STATCHILD 0x8000000 /* Child process stopped or exited. */
741 #define P_INMEM 0x10000000 /* Loaded into memory. */
742 #define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */
743 #define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */
744 #define P_PPTRACE 0x80000000 /* PT_TRACEME by vforked child. */
746 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
747 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
748 #define P_KILLED(p) ((p)->p_flag & P_WKILLED)
750 /* These flags are kept in p_flag2. */
751 #define P2_INHERIT_PROTECTED 0x00000001 /* New children get P_PROTECTED. */
752 #define P2_NOTRACE 0x00000002 /* No ptrace(2) attach or coredumps. */
753 #define P2_NOTRACE_EXEC 0x00000004 /* Keep P2_NOPTRACE on exec(2). */
754 #define P2_AST_SU 0x00000008 /* Handles SU ast for kthreads. */
755 #define P2_PTRACE_FSTP 0x00000010 /* SIGSTOP from PT_ATTACH not yet handled. */
756 #define P2_TRAPCAP 0x00000020 /* SIGTRAP on ENOTCAPABLE */
758 /* Flags protected by proctree_lock, kept in p_treeflags. */
759 #define P_TREE_ORPHANED 0x00000001 /* Reparented, on orphan list */
760 #define P_TREE_FIRST_ORPHAN 0x00000002 /* First element of orphan
762 #define P_TREE_REAPER 0x00000004 /* Reaper of subtree */
765 * These were process status values (p_stat), now they are only used in
766 * legacy conversion code.
768 #define SIDL 1 /* Process being created by fork. */
769 #define SRUN 2 /* Currently runnable. */
770 #define SSLEEP 3 /* Sleeping on an address. */
771 #define SSTOP 4 /* Process debugging or suspension. */
772 #define SZOMB 5 /* Awaiting collection by parent. */
773 #define SWAIT 6 /* Waiting for interrupt. */
774 #define SLOCK 7 /* Blocked on a lock. */
776 #define P_MAGIC 0xbeefface
780 /* Types and flags for mi_switch(). */
781 #define SW_TYPE_MASK 0xff /* First 8 bits are switch type */
782 #define SWT_NONE 0 /* Unspecified switch. */
783 #define SWT_PREEMPT 1 /* Switching due to preemption. */
784 #define SWT_OWEPREEMPT 2 /* Switching due to owepreempt. */
785 #define SWT_TURNSTILE 3 /* Turnstile contention. */
786 #define SWT_SLEEPQ 4 /* Sleepq wait. */
787 #define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */
788 #define SWT_RELINQUISH 6 /* yield call. */
789 #define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */
790 #define SWT_IDLE 8 /* Switching from the idle thread. */
791 #define SWT_IWAIT 9 /* Waiting for interrupts. */
792 #define SWT_SUSPEND 10 /* Thread suspended. */
793 #define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */
794 #define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */
795 #define SWT_COUNT 13 /* Number of switch types. */
797 #define SW_VOL 0x0100 /* Voluntary switch. */
798 #define SW_INVOL 0x0200 /* Involuntary switch. */
799 #define SW_PREEMPT 0x0400 /* The invol switch is a preemption */
801 /* How values for thread_single(). */
802 #define SINGLE_NO_EXIT 0
803 #define SINGLE_EXIT 1
804 #define SINGLE_BOUNDARY 2
805 #define SINGLE_ALLPROC 3
807 #ifdef MALLOC_DECLARE
808 MALLOC_DECLARE(M_PARGS);
809 MALLOC_DECLARE(M_PGRP);
810 MALLOC_DECLARE(M_SESSION);
811 MALLOC_DECLARE(M_SUBPROC);
814 #define FOREACH_PROC_IN_SYSTEM(p) \
815 LIST_FOREACH((p), &allproc, p_list)
816 #define FOREACH_THREAD_IN_PROC(p, td) \
817 TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
819 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads)
822 * We use process IDs <= pid_max <= PID_MAX; PID_MAX + 1 must also fit
823 * in a pid_t, as it is used to represent "no process group".
825 #define PID_MAX 99999
826 #define NO_PID 100000
827 extern pid_t pid_max;
829 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
832 #define STOPEVENT(p, e, v) do { \
833 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, \
834 "checking stopevent %d", (e)); \
835 if ((p)->p_stops & (e)) { \
837 stopevent((p), (e), (v)); \
841 #define _STOPEVENT(p, e, v) do { \
842 PROC_LOCK_ASSERT(p, MA_OWNED); \
843 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.lock_object, \
844 "checking stopevent %d", (e)); \
845 if ((p)->p_stops & (e)) \
846 stopevent((p), (e), (v)); \
849 /* Lock and unlock a process. */
850 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
851 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
852 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
853 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
854 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
856 /* Lock and unlock a process group. */
857 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
858 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
859 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
860 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
862 #define PGRP_LOCK_PGSIGNAL(pg) do { \
866 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \
871 /* Lock and unlock a session. */
872 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
873 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
874 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
875 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
878 * Non-zero p_lock ensures that:
879 * - exit1() is not performed until p_lock reaches zero;
880 * - the process' threads stack are not swapped out if they are currently
883 * PHOLD() asserts that the process (except the current process) is
884 * not exiting, increments p_lock and swaps threads stacks into memory,
886 * _PHOLD() is same as PHOLD(), it takes the process locked.
887 * _PHOLD_LITE() also takes the process locked, but comparing with
888 * _PHOLD(), it only guarantees that exit1() is not executed,
889 * faultin() is not called.
891 #define PHOLD(p) do { \
896 #define _PHOLD(p) do { \
897 PROC_LOCK_ASSERT((p), MA_OWNED); \
898 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \
899 ("PHOLD of exiting process %p", p)); \
901 if (((p)->p_flag & P_INMEM) == 0) \
904 #define _PHOLD_LITE(p) do { \
905 PROC_LOCK_ASSERT((p), MA_OWNED); \
906 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \
907 ("PHOLD of exiting process %p", p)); \
910 #define PROC_ASSERT_HELD(p) do { \
911 KASSERT((p)->p_lock > 0, ("process %p not held", p)); \
914 #define PRELE(p) do { \
919 #define _PRELE(p) do { \
920 PROC_LOCK_ASSERT((p), MA_OWNED); \
921 PROC_ASSERT_HELD(p); \
923 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \
924 wakeup(&(p)->p_lock); \
926 #define PROC_ASSERT_NOT_HELD(p) do { \
927 KASSERT((p)->p_lock == 0, ("process %p held", p)); \
930 #define PROC_UPDATE_COW(p) do { \
931 PROC_LOCK_ASSERT((p), MA_OWNED); \
935 /* Check whether a thread is safe to be swapped out. */
936 #define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP)
938 /* Control whether or not it is safe for curthread to sleep. */
939 #define THREAD_NO_SLEEPING() ((curthread)->td_no_sleeping++)
941 #define THREAD_SLEEPING_OK() ((curthread)->td_no_sleeping--)
943 #define THREAD_CAN_SLEEP() ((curthread)->td_no_sleeping == 0)
945 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
946 #define PIDHASHLOCK(pid) (&pidhashtbl_lock[((pid) & pidhashlock)])
947 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
948 extern struct sx *pidhashtbl_lock;
949 extern u_long pidhash;
950 extern u_long pidhashlock;
951 #define TIDHASH(tid) (&tidhashtbl[(tid) & tidhash])
952 extern LIST_HEAD(tidhashhead, thread) *tidhashtbl;
953 extern u_long tidhash;
954 extern struct rwlock tidhash_lock;
956 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
957 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
958 extern u_long pgrphash;
960 extern struct sx allproc_lock;
961 extern int allproc_gen;
962 extern struct sx proctree_lock;
963 extern struct mtx ppeers_lock;
964 extern struct proc proc0; /* Process slot for swapper. */
965 extern struct thread0_storage thread0_st; /* Primary thread in proc0. */
966 #define thread0 (thread0_st.t0st_thread)
967 extern struct vmspace vmspace0; /* VM space for proc0. */
968 extern int hogticks; /* Limit on kernel cpu hogs. */
970 extern int nprocs, maxproc; /* Current and max number of procs. */
971 extern int maxprocperuid; /* Max procs per uid. */
972 extern u_long ps_arg_cache_limit;
974 LIST_HEAD(proclist, proc);
975 TAILQ_HEAD(procqueue, proc);
976 TAILQ_HEAD(threadqueue, thread);
977 extern struct proclist allproc; /* List of all processes. */
978 extern struct proclist zombproc; /* List of zombie processes. */
979 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
981 extern struct uma_zone *proc_zone;
983 struct proc *pfind(pid_t); /* Find process by id. */
984 struct proc *pfind_any(pid_t); /* Find (zombie) process by id. */
985 struct pgrp *pgfind(pid_t); /* Find process group by id. */
986 struct proc *zpfind(pid_t); /* Find zombie process by id. */
992 struct proc **fr_procp;
995 struct filecaps *fr_pd_fcaps;
1001 #define PGET_HOLD 0x00001 /* Hold the process. */
1002 #define PGET_CANSEE 0x00002 /* Check against p_cansee(). */
1003 #define PGET_CANDEBUG 0x00004 /* Check against p_candebug(). */
1004 #define PGET_ISCURRENT 0x00008 /* Check that the found process is current. */
1005 #define PGET_NOTWEXIT 0x00010 /* Check that the process is not in P_WEXIT. */
1006 #define PGET_NOTINEXEC 0x00020 /* Check that the process is not in P_INEXEC. */
1007 #define PGET_NOTID 0x00040 /* Do not assume tid if pid > PID_MAX. */
1009 #define PGET_WANTREAD (PGET_HOLD | PGET_CANDEBUG | PGET_NOTWEXIT)
1011 int pget(pid_t pid, int flags, struct proc **pp);
1013 void ast(struct trapframe *framep);
1014 struct thread *choosethread(void);
1015 int cr_cansee(struct ucred *u1, struct ucred *u2);
1016 int cr_canseesocket(struct ucred *cred, struct socket *so);
1017 int cr_canseeothergids(struct ucred *u1, struct ucred *u2);
1018 int cr_canseeotheruids(struct ucred *u1, struct ucred *u2);
1019 int cr_canseejailproc(struct ucred *u1, struct ucred *u2);
1020 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
1021 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp,
1022 struct session *sess);
1023 int enterthispgrp(struct proc *p, struct pgrp *pgrp);
1024 void faultin(struct proc *p);
1025 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
1026 int fork1(struct thread *, struct fork_req *);
1027 void fork_exit(void (*)(void *, struct trapframe *), void *,
1028 struct trapframe *);
1029 void fork_return(struct thread *, struct trapframe *);
1030 int inferior(struct proc *p);
1031 void kern_proc_vmmap_resident(struct vm_map *map, struct vm_map_entry *entry,
1032 int *resident_count, bool *super);
1033 void kern_yield(int);
1034 void kick_proc0(void);
1035 void killjobc(void);
1036 int leavepgrp(struct proc *p);
1037 int maybe_preempt(struct thread *td);
1038 void maybe_yield(void);
1039 void mi_switch(int flags, struct thread *newtd);
1040 int p_candebug(struct thread *td, struct proc *p);
1041 int p_cansee(struct thread *td, struct proc *p);
1042 int p_cansched(struct thread *td, struct proc *p);
1043 int p_cansignal(struct thread *td, struct proc *p, int signum);
1044 int p_canwait(struct thread *td, struct proc *p);
1045 struct pargs *pargs_alloc(int len);
1046 void pargs_drop(struct pargs *pa);
1047 void pargs_hold(struct pargs *pa);
1048 int proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb);
1049 int proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb);
1050 int proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb);
1051 void procinit(void);
1052 int proc_iterate(int (*cb)(struct proc *, void *), void *cbarg);
1053 void proc_linkup0(struct proc *p, struct thread *td);
1054 void proc_linkup(struct proc *p, struct thread *td);
1055 struct proc *proc_realparent(struct proc *child);
1056 void proc_reap(struct thread *td, struct proc *p, int *status, int options);
1057 void proc_reparent(struct proc *child, struct proc *newparent, bool set_oppid);
1058 void proc_set_traced(struct proc *p, bool stop);
1059 void proc_wkilled(struct proc *p);
1060 struct pstats *pstats_alloc(void);
1061 void pstats_fork(struct pstats *src, struct pstats *dst);
1062 void pstats_free(struct pstats *ps);
1063 void reaper_abandon_children(struct proc *p, bool exiting);
1064 int securelevel_ge(struct ucred *cr, int level);
1065 int securelevel_gt(struct ucred *cr, int level);
1066 void sess_hold(struct session *);
1067 void sess_release(struct session *);
1068 int setrunnable(struct thread *);
1069 void setsugid(struct proc *p);
1070 int should_yield(void);
1071 int sigonstack(size_t sp);
1072 void stopevent(struct proc *, u_int, u_int);
1073 struct thread *tdfind(lwpid_t, pid_t);
1074 void threadinit(void);
1075 void tidhash_add(struct thread *);
1076 void tidhash_remove(struct thread *);
1078 int cpu_idle_wakeup(int);
1079 extern void (*cpu_idle_hook)(sbintime_t); /* Hook to machdep CPU idler. */
1080 void cpu_switch(struct thread *, struct thread *, struct mtx *);
1081 void cpu_throw(struct thread *, struct thread *) __dead2;
1082 void unsleep(struct thread *);
1083 void userret(struct thread *, struct trapframe *);
1085 void cpu_exit(struct thread *);
1086 void exit1(struct thread *, int, int) __dead2;
1087 void cpu_copy_thread(struct thread *td, struct thread *td0);
1088 int cpu_fetch_syscall_args(struct thread *td);
1089 void cpu_fork(struct thread *, struct proc *, struct thread *, int);
1090 void cpu_fork_kthread_handler(struct thread *, void (*)(void *), void *);
1091 void cpu_set_syscall_retval(struct thread *, int);
1092 void cpu_set_upcall(struct thread *, void (*)(void *), void *,
1094 int cpu_set_user_tls(struct thread *, void *tls_base);
1095 void cpu_thread_alloc(struct thread *);
1096 void cpu_thread_clean(struct thread *);
1097 void cpu_thread_exit(struct thread *);
1098 void cpu_thread_free(struct thread *);
1099 void cpu_thread_swapin(struct thread *);
1100 void cpu_thread_swapout(struct thread *);
1101 struct thread *thread_alloc(int pages);
1102 int thread_alloc_stack(struct thread *, int pages);
1103 void thread_cow_get_proc(struct thread *newtd, struct proc *p);
1104 void thread_cow_get(struct thread *newtd, struct thread *td);
1105 void thread_cow_free(struct thread *td);
1106 void thread_cow_update(struct thread *td);
1107 int thread_create(struct thread *td, struct rtprio *rtp,
1108 int (*initialize_thread)(struct thread *, void *), void *thunk);
1109 void thread_exit(void) __dead2;
1110 void thread_free(struct thread *td);
1111 void thread_link(struct thread *td, struct proc *p);
1112 void thread_reap(void);
1113 int thread_single(struct proc *p, int how);
1114 void thread_single_end(struct proc *p, int how);
1115 void thread_stash(struct thread *td);
1116 void thread_stopped(struct proc *p);
1117 void childproc_stopped(struct proc *child, int reason);
1118 void childproc_continued(struct proc *child);
1119 void childproc_exited(struct proc *child);
1120 int thread_suspend_check(int how);
1121 bool thread_suspend_check_needed(void);
1122 void thread_suspend_switch(struct thread *, struct proc *p);
1123 void thread_suspend_one(struct thread *td);
1124 void thread_unlink(struct thread *td);
1125 void thread_unsuspend(struct proc *p);
1126 void thread_wait(struct proc *p);
1127 struct thread *thread_find(struct proc *p, lwpid_t tid);
1129 void stop_all_proc(void);
1130 void resume_all_proc(void);
1133 curthread_pflags_set(int flags)
1139 save = ~flags | (td->td_pflags & flags);
1140 td->td_pflags |= flags;
1144 static __inline void
1145 curthread_pflags_restore(int save)
1148 curthread->td_pflags &= save;
1151 static __inline __pure2 struct td_sched *
1152 td_get_sched(struct thread *td)
1155 return ((struct td_sched *)&td[1]);
1158 extern void (*softdep_ast_cleanup)(struct thread *);
1159 static __inline void
1160 td_softdep_cleanup(struct thread *td)
1163 if (td->td_su != NULL && softdep_ast_cleanup != NULL)
1164 softdep_ast_cleanup(td);
1167 #endif /* _KERNEL */
1169 #endif /* !_SYS_PROC_H_ */