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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>
79 * A section object may be passed to every begin-end pair to allow for
80 * forward progress guarantees with-in prolonged active sections.
82 * We can't include ck_epoch.h so we define our own variant here and
83 * then CTASSERT that it's the same size in subr_epoch.c
85 struct epoch_section {
88 typedef struct epoch_section epoch_section_t;
91 * One structure allocated per session.
94 * (m) locked by s_mtx mtx
95 * (e) locked by proctree_lock sx
96 * (c) const until freeing
99 u_int s_count; /* Ref cnt; pgrps in session - atomic. */
100 struct proc *s_leader; /* (m + e) Session leader. */
101 struct vnode *s_ttyvp; /* (m) Vnode of controlling tty. */
102 struct cdev_priv *s_ttydp; /* (m) Device of controlling tty. */
103 struct tty *s_ttyp; /* (e) Controlling tty. */
104 pid_t s_sid; /* (c) Session ID. */
105 /* (m) Setlogin() name: */
106 char s_login[roundup(MAXLOGNAME, sizeof(long))];
107 struct mtx s_mtx; /* Mutex to protect members. */
111 * One structure allocated per process group.
114 * (m) locked by pg_mtx mtx
115 * (e) locked by proctree_lock sx
116 * (c) const until freeing
119 LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */
120 LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */
121 struct session *pg_session; /* (c) Pointer to session. */
122 struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */
123 pid_t pg_id; /* (c) Process group id. */
124 int pg_jobc; /* (m) Job control process count. */
125 struct mtx pg_mtx; /* Mutex to protect members */
129 * pargs, used to hold a copy of the command line, if it had a sane length.
132 u_int ar_ref; /* Reference count. */
133 u_int ar_length; /* Length. */
134 u_char ar_args[1]; /* Arguments. */
138 * Description of a process.
140 * This structure contains the information needed to manage a thread of
141 * control, known in UN*X as a process; it has references to substructures
142 * containing descriptions of things that the process uses, but may share
143 * with related processes. The process structure and the substructures
144 * are always addressable except for those marked "(CPU)" below,
145 * which might be addressable only on a processor on which the process
148 * Below is a key of locks used to protect each member of struct proc. The
149 * lock is indicated by a reference to a specific character in parens in the
150 * associated comment.
151 * * - not yet protected
152 * a - only touched by curproc or parent during fork/wait
153 * b - created at fork, never changes
154 * (exception aiods switch vmspaces, but they are also
155 * marked 'P_SYSTEM' so hopefully it will be left alone)
156 * c - locked by proc mtx
157 * d - locked by allproc_lock lock
158 * e - locked by proctree_lock lock
160 * g - process group mtx
161 * h - callout_lock mtx
162 * i - by curproc or the master session mtx
163 * j - locked by proc slock
164 * k - only accessed by curthread
165 * k*- only accessed by curthread and from an interrupt
166 * kx- only accessed by curthread and by debugger
167 * l - the attaching proc or attaching proc parent
169 * n - not locked, lazy
171 * q - td_contested lock
173 * s - see sleepq_switch(), sleeping_on_old_rtc(), and sleep(9)
175 * u - process stat lock
176 * w - process timer lock
177 * x - created at fork, only changes during single threading in exec
178 * y - created at first aio, doesn't change until exit or exec at which
179 * point we are single-threaded and only curthread changes it
180 * z - zombie threads lock
182 * If the locking key specifies two identifiers (for example, p_pptr) then
183 * either lock is sufficient for read access, but both locks must be held
190 struct kaudit_record;
192 struct kdtrace_thread;
193 struct mqueue_notifier;
211 * XXX: Does this belong in resource.h or resourcevar.h instead?
212 * Resource usage extension. The times in rusage structs in the kernel are
213 * never up to date. The actual times are kept as runtimes and tick counts
214 * (with control info in the "previous" times), and are converted when
215 * userland asks for rusage info. Backwards compatibility prevents putting
216 * this directly in the user-visible rusage struct.
218 * Locking for p_rux: (cu) means (u) for p_rux and (c) for p_crux.
219 * Locking for td_rux: (t) for all fields.
222 uint64_t rux_runtime; /* (cu) Real time. */
223 uint64_t rux_uticks; /* (cu) Statclock hits in user mode. */
224 uint64_t rux_sticks; /* (cu) Statclock hits in sys mode. */
225 uint64_t rux_iticks; /* (cu) Statclock hits in intr mode. */
226 uint64_t rux_uu; /* (c) Previous user time in usec. */
227 uint64_t rux_su; /* (c) Previous sys time in usec. */
228 uint64_t rux_tu; /* (c) Previous total time in usec. */
232 * Kernel runnable context (thread).
233 * This is what is put to sleep and reactivated.
234 * Thread context. Processes may have multiple threads.
237 struct mtx *volatile td_lock; /* replaces sched lock */
238 struct proc *td_proc; /* (*) Associated process. */
239 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */
240 TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */
241 TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */
242 TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */
243 LIST_ENTRY(thread) td_hash; /* (d) Hash chain. */
244 struct cpuset *td_cpuset; /* (t) CPU affinity mask. */
245 struct domainset_ref td_domain; /* (a) NUMA policy */
246 struct seltd *td_sel; /* Select queue/channel. */
247 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */
248 struct turnstile *td_turnstile; /* (k) Associated turnstile. */
249 struct rl_q_entry *td_rlqe; /* (k) Associated range lock entry. */
250 struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */
251 lwpid_t td_tid; /* (b) Thread ID. */
252 sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */
253 #define td_siglist td_sigqueue.sq_signals
254 u_char td_lend_user_pri; /* (t) Lend user pri. */
256 /* Cleared during fork1() */
257 #define td_startzero td_epochnest
258 u_char td_epochnest; /* (k) Epoch nest counter. */
259 int td_flags; /* (t) TDF_* flags. */
260 int td_inhibitors; /* (t) Why can not run. */
261 int td_pflags; /* (k) Private thread (TDP_*) flags. */
262 int td_dupfd; /* (k) Ret value from fdopen. XXX */
263 int td_sqqueue; /* (t) Sleepqueue queue blocked on. */
264 void *td_wchan; /* (t) Sleep address. */
265 const char *td_wmesg; /* (t) Reason for sleep. */
266 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */
267 u_char td_tsqueue; /* (t) Turnstile queue blocked on. */
268 short td_locks; /* (k) Debug: count of non-spin locks */
269 short td_rw_rlocks; /* (k) Count of rwlock read locks. */
270 short td_sx_slocks; /* (k) Count of sx shared locks. */
271 short td_lk_slocks; /* (k) Count of lockmgr shared locks. */
272 short td_stopsched; /* (k) Scheduler stopped. */
273 struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */
274 const char *td_lockname; /* (t) Name of lock blocked on. */
275 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */
276 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
277 int td_intr_nesting_level; /* (k) Interrupt recursion. */
278 int td_pinned; /* (k) Temporary cpu pin count. */
279 struct ucred *td_ucred; /* (k) Reference to credentials. */
280 struct plimit *td_limit; /* (k) Resource limits. */
281 int td_slptick; /* (t) Time at sleep. */
282 int td_blktick; /* (t) Time spent blocked. */
283 int td_swvoltick; /* (t) Time at last SW_VOL switch. */
284 int td_swinvoltick; /* (t) Time at last SW_INVOL switch. */
285 u_int td_cow; /* (*) Number of copy-on-write faults */
286 struct rusage td_ru; /* (t) rusage information. */
287 struct rusage_ext td_rux; /* (t) Internal rusage information. */
288 uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */
289 uint64_t td_runtime; /* (t) How many cpu ticks we've run. */
290 u_int td_pticks; /* (t) Statclock hits for profiling */
291 u_int td_sticks; /* (t) Statclock hits in system mode. */
292 u_int td_iticks; /* (t) Statclock hits in intr mode. */
293 u_int td_uticks; /* (t) Statclock hits in user mode. */
294 int td_intrval; /* (t) Return value for sleepq. */
295 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */
296 volatile u_int td_generation; /* (k) For detection of preemption */
297 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */
298 int td_xsig; /* (c) Signal for ptrace */
299 u_long td_profil_addr; /* (k) Temporary addr until AST. */
300 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */
301 char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */
302 struct file *td_fpop; /* (k) file referencing cdev under op */
303 int td_dbgflags; /* (c) Userland debugger flags */
304 siginfo_t td_si; /* (c) For debugger or core file */
305 int td_ng_outbound; /* (k) Thread entered ng from above. */
306 struct osd td_osd; /* (k) Object specific data. */
307 struct vm_map_entry *td_map_def_user; /* (k) Deferred entries. */
308 pid_t td_dbg_forked; /* (c) Child pid for debugger. */
309 u_int td_vp_reserv; /* (k) Count of reserved vnodes. */
310 int td_no_sleeping; /* (k) Sleeping disabled count. */
311 void *td_su; /* (k) FFS SU private */
312 sbintime_t td_sleeptimo; /* (t) Sleep timeout. */
313 int td_rtcgen; /* (s) rtc_generation of abs. sleep */
314 size_t td_vslock_sz; /* (k) amount of vslock-ed space */
315 #define td_endzero td_sigmask
317 /* Copied during fork1() or create_thread(). */
318 #define td_startcopy td_endzero
319 sigset_t td_sigmask; /* (c) Current signal mask. */
320 u_char td_rqindex; /* (t) Run queue index. */
321 u_char td_base_pri; /* (t) Thread base kernel priority. */
322 u_char td_priority; /* (t) Thread active priority. */
323 u_char td_pri_class; /* (t) Scheduling class. */
324 u_char td_user_pri; /* (t) User pri from estcpu and nice. */
325 u_char td_base_user_pri; /* (t) Base user pri */
326 u_char td_pre_epoch_prio; /* (k) User pri on entry to epoch */
327 uintptr_t td_rb_list; /* (k) Robust list head. */
328 uintptr_t td_rbp_list; /* (k) Robust priv list head. */
329 uintptr_t td_rb_inact; /* (k) Current in-action mutex loc. */
330 struct syscall_args td_sa; /* (kx) Syscall parameters. Copied on
331 fork for child tracing. */
332 #define td_endcopy td_pcb
335 * Fields that must be manually set in fork1() or create_thread()
336 * or already have been set in the allocator, constructor, etc.
338 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
345 } td_state; /* (t) thread state */
347 register_t tdu_retval[2];
349 } td_uretoff; /* (k) Syscall aux returns. */
350 #define td_retval td_uretoff.tdu_retval
351 u_int td_cowgen; /* (k) Generation of COW pointers. */
353 struct callout td_slpcallout; /* (h) Callout for sleep. */
354 struct trapframe *td_frame; /* (k) */
355 struct vm_object *td_kstack_obj;/* (a) Kstack object. */
356 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
357 int td_kstack_pages; /* (a) Size of the kstack. */
358 volatile u_int td_critnest; /* (k*) Critical section nest level. */
359 struct mdthread td_md; /* (k) Any machine-dependent fields. */
360 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */
361 struct lpohead td_lprof[2]; /* (a) lock profiling objects. */
362 struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */
363 int td_errno; /* Error returned by last syscall. */
365 struct vnet *td_vnet; /* (k) Effective vnet. */
366 const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */
367 struct trapframe *td_intr_frame;/* (k) Frame of the current irq */
368 struct proc *td_rfppwait_p; /* (k) The vforked child */
369 struct vm_page **td_ma; /* (k) uio pages held */
370 int td_ma_cnt; /* (k) size of *td_ma */
372 void *td_emuldata; /* Emulator state data */
373 int td_lastcpu; /* (t) Last cpu we were on. */
374 int td_oncpu; /* (t) Which cpu we are on. */
375 void *td_lkpi_task; /* LinuxKPI task struct pointer */
376 TAILQ_ENTRY(thread) td_epochq; /* (t) Epoch queue. */
377 epoch_section_t td_epoch_section; /* (t) epoch section object */
381 struct thread0_storage {
382 struct thread t0st_thread;
383 uint64_t t0st_sched[10];
386 struct mtx *thread_lock_block(struct thread *);
387 void thread_lock_unblock(struct thread *, struct mtx *);
388 void thread_lock_set(struct thread *, struct mtx *);
389 #define THREAD_LOCK_ASSERT(td, type) \
391 struct mtx *__m = (td)->td_lock; \
392 if (__m != &blocked_lock) \
393 mtx_assert(__m, (type)); \
397 #define THREAD_LOCKPTR_ASSERT(td, lock) \
399 struct mtx *__m = (td)->td_lock; \
400 KASSERT((__m == &blocked_lock || __m == (lock)), \
401 ("Thread %p lock %p does not match %p", td, __m, (lock))); \
404 #define TD_LOCKS_INC(td) ((td)->td_locks++)
405 #define TD_LOCKS_DEC(td) do { \
406 KASSERT(SCHEDULER_STOPPED_TD(td) || (td)->td_locks > 0, \
407 ("thread %p owns no locks", (td))); \
411 #define THREAD_LOCKPTR_ASSERT(td, lock)
413 #define TD_LOCKS_INC(td)
414 #define TD_LOCKS_DEC(td)
418 * Flags kept in td_flags:
419 * To change these you MUST have the scheduler lock.
421 #define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */
422 #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */
423 #define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */
424 #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */
425 #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */
426 #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */
427 #define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */
428 #define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */
429 #define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */
430 #define TDF_ALLPROCSUSP 0x00000200 /* suspended by SINGLE_ALLPROC */
431 #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */
432 #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */
433 #define TDF_UNUSED12 0x00001000 /* --available-- */
434 #define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */
435 #define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */
436 #define TDF_NEEDSUSPCHK 0x00008000 /* Thread may need to suspend. */
437 #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */
438 #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */
439 #define TDF_NOLOAD 0x00040000 /* Ignore during load avg calculations. */
440 #define TDF_SERESTART 0x00080000 /* ERESTART on stop attempts. */
441 #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */
442 #define TDF_SEINTR 0x00200000 /* EINTR on stop attempts. */
443 #define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */
444 #define TDF_UNUSED23 0x00800000 /* --available-- */
445 #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */
446 #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */
447 #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */
448 #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */
449 #define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */
450 #define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */
451 #define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */
453 /* Userland debug flags */
454 #define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */
455 #define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */
456 #define TDB_USERWR 0x00000004 /* Debugger modified memory or registers */
457 #define TDB_SCE 0x00000008 /* Thread performs syscall enter */
458 #define TDB_SCX 0x00000010 /* Thread performs syscall exit */
459 #define TDB_EXEC 0x00000020 /* TDB_SCX from exec(2) family */
460 #define TDB_FORK 0x00000040 /* TDB_SCX from fork(2) that created new
462 #define TDB_STOPATFORK 0x00000080 /* Stop at the return from fork (child
464 #define TDB_CHILD 0x00000100 /* New child indicator for ptrace() */
465 #define TDB_BORN 0x00000200 /* New LWP indicator for ptrace() */
466 #define TDB_EXIT 0x00000400 /* Exiting LWP indicator for ptrace() */
467 #define TDB_VFORK 0x00000800 /* vfork indicator for ptrace() */
468 #define TDB_FSTP 0x00001000 /* The thread is PT_ATTACH leader */
469 #define TDB_STEP 0x00002000 /* (x86) PSL_T set for PT_STEP */
472 * "Private" flags kept in td_pflags:
473 * These are only written by curthread and thus need no locking.
475 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */
476 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */
477 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */
478 #define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */
479 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */
480 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */
481 #define TDP_DEADLKTREAT 0x00000040 /* Lock acquisition - deadlock treatment. */
482 #define TDP_NOFAULTING 0x00000080 /* Do not handle page faults. */
483 #define TDP_UNUSED9 0x00000100 /* --available-- */
484 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */
485 #define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */
486 #define TDP_SYNCIO 0x00000800 /* Local override, disable async i/o. */
487 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */
488 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */
489 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */
490 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */
491 #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */
492 #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */
493 #define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */
494 #define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */
495 #define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */
496 #define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */
497 #define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */
498 #define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */
499 #define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */
500 #define TDP_RFPPWAIT 0x02000000 /* Handle RFPPWAIT on syscall exit */
501 #define TDP_RESETSPUR 0x04000000 /* Reset spurious page fault history. */
502 #define TDP_NERRNO 0x08000000 /* Last errno is already in td_errno */
503 #define TDP_UIOHELD 0x10000000 /* Current uio has pages held in td_ma */
504 #define TDP_FORKING 0x20000000 /* Thread is being created through fork() */
505 #define TDP_EXECVMSPC 0x40000000 /* Execve destroyed old vmspace */
508 * Reasons that the current thread can not be run yet.
509 * More than one may apply.
511 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */
512 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
513 #define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */
514 #define TDI_LOCK 0x0008 /* Stopped on a lock. */
515 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
517 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
518 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
519 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
520 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
521 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
522 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
523 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
524 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
525 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
526 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
527 #define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED)
528 #define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD)
530 #define KTDSTATE(td) \
531 (((td)->td_inhibitors & TDI_SLEEPING) != 0 ? "sleep" : \
532 ((td)->td_inhibitors & TDI_SUSPENDED) != 0 ? "suspended" : \
533 ((td)->td_inhibitors & TDI_SWAPPED) != 0 ? "swapped" : \
534 ((td)->td_inhibitors & TDI_LOCK) != 0 ? "blocked" : \
535 ((td)->td_inhibitors & TDI_IWAIT) != 0 ? "iwait" : "yielding")
537 #define TD_SET_INHIB(td, inhib) do { \
538 (td)->td_state = TDS_INHIBITED; \
539 (td)->td_inhibitors |= (inhib); \
542 #define TD_CLR_INHIB(td, inhib) do { \
543 if (((td)->td_inhibitors & (inhib)) && \
544 (((td)->td_inhibitors &= ~(inhib)) == 0)) \
545 (td)->td_state = TDS_CAN_RUN; \
548 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
549 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
550 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
551 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
552 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
553 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
555 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
556 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
557 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
558 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
559 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
561 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING
562 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ
563 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN
565 #define TD_SBDRY_INTR(td) \
566 (((td)->td_flags & (TDF_SEINTR | TDF_SERESTART)) != 0)
567 #define TD_SBDRY_ERRNO(td) \
568 (((td)->td_flags & TDF_SEINTR) != 0 ? EINTR : ERESTART)
574 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
575 TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */
576 struct mtx p_slock; /* process spin lock */
577 struct ucred *p_ucred; /* (c) Process owner's identity. */
578 struct filedesc *p_fd; /* (b) Open files. */
579 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */
580 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
581 struct plimit *p_limit; /* (c) Resource limits. */
582 struct callout p_limco; /* (c) Limit callout handle */
583 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */
585 int p_flag; /* (c) P_* flags. */
586 int p_flag2; /* (c) P2_* flags. */
588 PRS_NEW = 0, /* In creation */
589 PRS_NORMAL, /* threads can be run. */
591 } p_state; /* (j/c) Process status. */
592 pid_t p_pid; /* (b) Process identifier. */
593 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
594 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
595 struct proc *p_pptr; /* (c + e) Pointer to parent process. */
596 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
597 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
598 struct proc *p_reaper; /* (e) My reaper. */
599 LIST_HEAD(, proc) p_reaplist; /* (e) List of my descendants
601 LIST_ENTRY(proc) p_reapsibling; /* (e) List of siblings - descendants of
603 struct mtx p_mtx; /* (n) Lock for this struct. */
604 struct mtx p_statmtx; /* Lock for the stats */
605 struct mtx p_itimmtx; /* Lock for the virt/prof timers */
606 struct mtx p_profmtx; /* Lock for the profiling */
607 struct ksiginfo *p_ksi; /* Locked by parent proc lock */
608 sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */
609 #define p_siglist p_sigqueue.sq_signals
611 /* The following fields are all zeroed upon creation in fork. */
612 #define p_startzero p_oppid
613 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */
614 struct vmspace *p_vmspace; /* (b) Address space. */
615 u_int p_swtick; /* (c) Tick when swapped in or out. */
616 u_int p_cowgen; /* (c) Generation of COW pointers. */
617 struct itimerval p_realtimer; /* (c) Alarm timer. */
618 struct rusage p_ru; /* (a) Exit information. */
619 struct rusage_ext p_rux; /* (cu) Internal resource usage. */
620 struct rusage_ext p_crux; /* (c) Internal child resource usage. */
621 int p_profthreads; /* (c) Num threads in addupc_task. */
622 volatile int p_exitthreads; /* (j) Number of threads exiting */
623 int p_traceflag; /* (o) Kernel trace points. */
624 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */
625 struct ucred *p_tracecred; /* (o) Credentials to trace with. */
626 struct vnode *p_textvp; /* (b) Vnode of executable. */
627 u_int p_lock; /* (c) Proclock (prevent swap) count. */
628 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
629 int p_sigparent; /* (c) Signal to parent on exit. */
630 int p_sig; /* (n) For core dump/debugger XXX. */
631 u_long p_code; /* (n) For core dump/debugger XXX. */
632 u_int p_stops; /* (c) Stop event bitmask. */
633 u_int p_stype; /* (c) Stop event type. */
634 char p_step; /* (c) Process is stopped. */
635 u_char p_pfsflags; /* (c) Procfs flags. */
636 u_int p_ptevents; /* (c + e) ptrace() event mask. */
637 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
638 struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */
639 struct thread *p_singlethread;/* (c + j) If single threading this is it */
640 int p_suspcount; /* (j) Num threads in suspended mode. */
641 struct thread *p_xthread; /* (c) Trap thread */
642 int p_boundary_count;/* (j) Num threads at user boundary */
643 int p_pendingcnt; /* how many signals are pending */
644 struct itimers *p_itimers; /* (c) POSIX interval timers. */
645 struct procdesc *p_procdesc; /* (e) Process descriptor, if any. */
646 u_int p_treeflag; /* (e) P_TREE flags */
647 int p_pendingexits; /* (c) Count of pending thread exits. */
648 struct filemon *p_filemon; /* (c) filemon-specific data. */
649 int p_pdeathsig; /* (c) Signal from parent on exit. */
650 /* End area that is zeroed on creation. */
651 #define p_endzero p_magic
653 /* The following fields are all copied upon creation in fork. */
654 #define p_startcopy p_endzero
655 u_int p_magic; /* (b) Magic number. */
656 int p_osrel; /* (x) osreldate for the
657 binary (from ELF note, if any) */
658 char p_comm[MAXCOMLEN + 1]; /* (x) Process name. */
659 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
660 struct pargs *p_args; /* (c) Process arguments. */
661 rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */
662 signed char p_nice; /* (c) Process "nice" value. */
663 int p_fibnum; /* in this routing domain XXX MRT */
664 pid_t p_reapsubtree; /* (e) Pid of the direct child of the
667 uint16_t p_elf_machine; /* (x) ELF machine type */
668 uint64_t p_elf_flags; /* (x) ELF flags */
669 /* End area that is copied on creation. */
670 #define p_endcopy p_xexit
672 u_int p_xexit; /* (c) Exit code. */
673 u_int p_xsig; /* (c) Stop/kill sig. */
674 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
675 struct knlist *p_klist; /* (c) Knotes attached to this proc. */
676 int p_numthreads; /* (c) Number of threads. */
677 struct mdproc p_md; /* Any machine-dependent fields. */
678 struct callout p_itcallout; /* (h + c) Interval timer callout. */
679 u_short p_acflag; /* (c) Accounting flags. */
680 struct proc *p_peers; /* (r) */
681 struct proc *p_leader; /* (b) */
682 void *p_emuldata; /* (c) Emulator state data. */
683 struct label *p_label; /* (*) Proc (not subject) MAC label. */
684 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */
685 LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/
686 struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */
687 struct cv p_pwait; /* (*) wait cv for exit/exec. */
688 struct cv p_dbgwait; /* (*) wait cv for debugger attach
690 uint64_t p_prev_runtime; /* (c) Resource usage accounting. */
691 struct racct *p_racct; /* (b) Resource accounting. */
692 int p_throttled; /* (c) Flag for racct pcpu throttling */
694 * An orphan is the child that has been re-parented to the
695 * debugger as a result of attaching to it. Need to keep
696 * track of them for parent to be able to collect the exit
697 * status of what used to be children.
699 LIST_ENTRY(proc) p_orphan; /* (e) List of orphan processes. */
700 LIST_HEAD(, proc) p_orphans; /* (e) Pointer to list of orphans. */
703 #define p_session p_pgrp->pg_session
704 #define p_pgid p_pgrp->pg_id
706 #define NOCPU (-1) /* For when we aren't on a CPU. */
707 #define NOCPU_OLD (255)
708 #define MAXCPU_OLD (254)
710 #define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock)
711 #define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock)
712 #define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type))
714 #define PROC_STATLOCK(p) mtx_lock_spin(&(p)->p_statmtx)
715 #define PROC_STATUNLOCK(p) mtx_unlock_spin(&(p)->p_statmtx)
716 #define PROC_STATLOCK_ASSERT(p, type) mtx_assert(&(p)->p_statmtx, (type))
718 #define PROC_ITIMLOCK(p) mtx_lock_spin(&(p)->p_itimmtx)
719 #define PROC_ITIMUNLOCK(p) mtx_unlock_spin(&(p)->p_itimmtx)
720 #define PROC_ITIMLOCK_ASSERT(p, type) mtx_assert(&(p)->p_itimmtx, (type))
722 #define PROC_PROFLOCK(p) mtx_lock_spin(&(p)->p_profmtx)
723 #define PROC_PROFUNLOCK(p) mtx_unlock_spin(&(p)->p_profmtx)
724 #define PROC_PROFLOCK_ASSERT(p, type) mtx_assert(&(p)->p_profmtx, (type))
726 /* These flags are kept in p_flag. */
727 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
728 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
729 #define P_KPROC 0x00004 /* Kernel process. */
730 #define P_UNUSED3 0x00008 /* --available-- */
731 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
732 #define P_PROFIL 0x00020 /* Has started profiling. */
733 #define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */
734 #define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */
735 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
736 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
737 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */
738 #define P_TRACED 0x00800 /* Debugged process being traced. */
739 #define P_WAITED 0x01000 /* Someone is waiting for us. */
740 #define P_WEXIT 0x02000 /* Working on exiting. */
741 #define P_EXEC 0x04000 /* Process called exec. */
742 #define P_WKILLED 0x08000 /* Killed, go to kernel/user boundary ASAP. */
743 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
744 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */
745 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */
746 #define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */
747 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
748 #define P_SIGEVENT 0x200000 /* Process pending signals changed. */
749 #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */
750 #define P_HWPMC 0x800000 /* Process is using HWPMCs */
751 #define P_JAILED 0x1000000 /* Process is in jail. */
752 #define P_TOTAL_STOP 0x2000000 /* Stopped in stop_all_proc. */
753 #define P_INEXEC 0x4000000 /* Process is in execve(). */
754 #define P_STATCHILD 0x8000000 /* Child process stopped or exited. */
755 #define P_INMEM 0x10000000 /* Loaded into memory. */
756 #define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */
757 #define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */
758 #define P_PPTRACE 0x80000000 /* PT_TRACEME by vforked child. */
760 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
761 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
762 #define P_KILLED(p) ((p)->p_flag & P_WKILLED)
764 /* These flags are kept in p_flag2. */
765 #define P2_INHERIT_PROTECTED 0x00000001 /* New children get P_PROTECTED. */
766 #define P2_NOTRACE 0x00000002 /* No ptrace(2) attach or coredumps. */
767 #define P2_NOTRACE_EXEC 0x00000004 /* Keep P2_NOPTRACE on exec(2). */
768 #define P2_AST_SU 0x00000008 /* Handles SU ast for kthreads. */
769 #define P2_PTRACE_FSTP 0x00000010 /* SIGSTOP from PT_ATTACH not yet handled. */
770 #define P2_TRAPCAP 0x00000020 /* SIGTRAP on ENOTCAPABLE */
772 /* Flags protected by proctree_lock, kept in p_treeflags. */
773 #define P_TREE_ORPHANED 0x00000001 /* Reparented, on orphan list */
774 #define P_TREE_FIRST_ORPHAN 0x00000002 /* First element of orphan
776 #define P_TREE_REAPER 0x00000004 /* Reaper of subtree */
779 * These were process status values (p_stat), now they are only used in
780 * legacy conversion code.
782 #define SIDL 1 /* Process being created by fork. */
783 #define SRUN 2 /* Currently runnable. */
784 #define SSLEEP 3 /* Sleeping on an address. */
785 #define SSTOP 4 /* Process debugging or suspension. */
786 #define SZOMB 5 /* Awaiting collection by parent. */
787 #define SWAIT 6 /* Waiting for interrupt. */
788 #define SLOCK 7 /* Blocked on a lock. */
790 #define P_MAGIC 0xbeefface
794 /* Types and flags for mi_switch(). */
795 #define SW_TYPE_MASK 0xff /* First 8 bits are switch type */
796 #define SWT_NONE 0 /* Unspecified switch. */
797 #define SWT_PREEMPT 1 /* Switching due to preemption. */
798 #define SWT_OWEPREEMPT 2 /* Switching due to owepreempt. */
799 #define SWT_TURNSTILE 3 /* Turnstile contention. */
800 #define SWT_SLEEPQ 4 /* Sleepq wait. */
801 #define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */
802 #define SWT_RELINQUISH 6 /* yield call. */
803 #define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */
804 #define SWT_IDLE 8 /* Switching from the idle thread. */
805 #define SWT_IWAIT 9 /* Waiting for interrupts. */
806 #define SWT_SUSPEND 10 /* Thread suspended. */
807 #define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */
808 #define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */
809 #define SWT_COUNT 13 /* Number of switch types. */
811 #define SW_VOL 0x0100 /* Voluntary switch. */
812 #define SW_INVOL 0x0200 /* Involuntary switch. */
813 #define SW_PREEMPT 0x0400 /* The invol switch is a preemption */
815 /* How values for thread_single(). */
816 #define SINGLE_NO_EXIT 0
817 #define SINGLE_EXIT 1
818 #define SINGLE_BOUNDARY 2
819 #define SINGLE_ALLPROC 3
821 #ifdef MALLOC_DECLARE
822 MALLOC_DECLARE(M_PARGS);
823 MALLOC_DECLARE(M_PGRP);
824 MALLOC_DECLARE(M_SESSION);
825 MALLOC_DECLARE(M_SUBPROC);
828 #define FOREACH_PROC_IN_SYSTEM(p) \
829 LIST_FOREACH((p), &allproc, p_list)
830 #define FOREACH_THREAD_IN_PROC(p, td) \
831 TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
833 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads)
836 * We use process IDs <= pid_max <= PID_MAX; PID_MAX + 1 must also fit
837 * in a pid_t, as it is used to represent "no process group".
839 #define PID_MAX 99999
840 #define NO_PID 100000
841 extern pid_t pid_max;
843 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
846 #define STOPEVENT(p, e, v) do { \
847 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, \
848 "checking stopevent %d", (e)); \
849 if ((p)->p_stops & (e)) { \
851 stopevent((p), (e), (v)); \
855 #define _STOPEVENT(p, e, v) do { \
856 PROC_LOCK_ASSERT(p, MA_OWNED); \
857 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.lock_object, \
858 "checking stopevent %d", (e)); \
859 if ((p)->p_stops & (e)) \
860 stopevent((p), (e), (v)); \
863 /* Lock and unlock a process. */
864 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
865 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
866 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
867 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
868 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
870 /* Lock and unlock a process group. */
871 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
872 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
873 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
874 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
876 #define PGRP_LOCK_PGSIGNAL(pg) do { \
880 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \
885 /* Lock and unlock a session. */
886 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
887 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
888 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
889 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
892 * Non-zero p_lock ensures that:
893 * - exit1() is not performed until p_lock reaches zero;
894 * - the process' threads stack are not swapped out if they are currently
897 * PHOLD() asserts that the process (except the current process) is
898 * not exiting, increments p_lock and swaps threads stacks into memory,
900 * _PHOLD() is same as PHOLD(), it takes the process locked.
901 * _PHOLD_LITE() also takes the process locked, but comparing with
902 * _PHOLD(), it only guarantees that exit1() is not executed,
903 * faultin() is not called.
905 #define PHOLD(p) do { \
910 #define _PHOLD(p) do { \
911 PROC_LOCK_ASSERT((p), MA_OWNED); \
912 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \
913 ("PHOLD of exiting process %p", p)); \
915 if (((p)->p_flag & P_INMEM) == 0) \
918 #define _PHOLD_LITE(p) do { \
919 PROC_LOCK_ASSERT((p), MA_OWNED); \
920 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \
921 ("PHOLD of exiting process %p", p)); \
924 #define PROC_ASSERT_HELD(p) do { \
925 KASSERT((p)->p_lock > 0, ("process %p not held", p)); \
928 #define PRELE(p) do { \
933 #define _PRELE(p) do { \
934 PROC_LOCK_ASSERT((p), MA_OWNED); \
935 PROC_ASSERT_HELD(p); \
937 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \
938 wakeup(&(p)->p_lock); \
940 #define PROC_ASSERT_NOT_HELD(p) do { \
941 KASSERT((p)->p_lock == 0, ("process %p held", p)); \
944 #define PROC_UPDATE_COW(p) do { \
945 PROC_LOCK_ASSERT((p), MA_OWNED); \
949 /* Check whether a thread is safe to be swapped out. */
950 #define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP)
952 /* Control whether or not it is safe for curthread to sleep. */
953 #define THREAD_NO_SLEEPING() ((curthread)->td_no_sleeping++)
955 #define THREAD_SLEEPING_OK() ((curthread)->td_no_sleeping--)
957 #define THREAD_CAN_SLEEP() ((curthread)->td_no_sleeping == 0)
959 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
960 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
961 extern u_long pidhash;
962 #define TIDHASH(tid) (&tidhashtbl[(tid) & tidhash])
963 extern LIST_HEAD(tidhashhead, thread) *tidhashtbl;
964 extern u_long tidhash;
965 extern struct rwlock tidhash_lock;
967 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
968 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
969 extern u_long pgrphash;
971 extern struct sx allproc_lock;
972 extern int allproc_gen;
973 extern struct sx proctree_lock;
974 extern struct mtx ppeers_lock;
975 extern struct proc proc0; /* Process slot for swapper. */
976 extern struct thread0_storage thread0_st; /* Primary thread in proc0. */
977 #define thread0 (thread0_st.t0st_thread)
978 extern struct vmspace vmspace0; /* VM space for proc0. */
979 extern int hogticks; /* Limit on kernel cpu hogs. */
981 extern int nprocs, maxproc; /* Current and max number of procs. */
982 extern int maxprocperuid; /* Max procs per uid. */
983 extern u_long ps_arg_cache_limit;
985 LIST_HEAD(proclist, proc);
986 TAILQ_HEAD(procqueue, proc);
987 TAILQ_HEAD(threadqueue, thread);
988 extern struct proclist allproc; /* List of all processes. */
989 extern struct proclist zombproc; /* List of zombie processes. */
990 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
992 extern struct uma_zone *proc_zone;
994 struct proc *pfind(pid_t); /* Find process by id. */
995 struct proc *pfind_any(pid_t); /* Find (zombie) process by id. */
996 struct proc *pfind_locked(pid_t pid);
997 struct pgrp *pgfind(pid_t); /* Find process group by id. */
998 struct proc *zpfind(pid_t); /* Find zombie process by id. */
1004 struct proc **fr_procp;
1007 struct filecaps *fr_pd_fcaps;
1013 #define PGET_HOLD 0x00001 /* Hold the process. */
1014 #define PGET_CANSEE 0x00002 /* Check against p_cansee(). */
1015 #define PGET_CANDEBUG 0x00004 /* Check against p_candebug(). */
1016 #define PGET_ISCURRENT 0x00008 /* Check that the found process is current. */
1017 #define PGET_NOTWEXIT 0x00010 /* Check that the process is not in P_WEXIT. */
1018 #define PGET_NOTINEXEC 0x00020 /* Check that the process is not in P_INEXEC. */
1019 #define PGET_NOTID 0x00040 /* Do not assume tid if pid > PID_MAX. */
1021 #define PGET_WANTREAD (PGET_HOLD | PGET_CANDEBUG | PGET_NOTWEXIT)
1023 int pget(pid_t pid, int flags, struct proc **pp);
1025 void ast(struct trapframe *framep);
1026 struct thread *choosethread(void);
1027 int cr_cansee(struct ucred *u1, struct ucred *u2);
1028 int cr_canseesocket(struct ucred *cred, struct socket *so);
1029 int cr_canseeothergids(struct ucred *u1, struct ucred *u2);
1030 int cr_canseeotheruids(struct ucred *u1, struct ucred *u2);
1031 int cr_canseejailproc(struct ucred *u1, struct ucred *u2);
1032 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
1033 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp,
1034 struct session *sess);
1035 int enterthispgrp(struct proc *p, struct pgrp *pgrp);
1036 void faultin(struct proc *p);
1037 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
1038 int fork1(struct thread *, struct fork_req *);
1039 void fork_exit(void (*)(void *, struct trapframe *), void *,
1040 struct trapframe *);
1041 void fork_return(struct thread *, struct trapframe *);
1042 int inferior(struct proc *p);
1043 void kern_proc_vmmap_resident(struct vm_map *map, struct vm_map_entry *entry,
1044 int *resident_count, bool *super);
1045 void kern_yield(int);
1046 void kick_proc0(void);
1047 void killjobc(void);
1048 int leavepgrp(struct proc *p);
1049 int maybe_preempt(struct thread *td);
1050 void maybe_yield(void);
1051 void mi_switch(int flags, struct thread *newtd);
1052 int p_candebug(struct thread *td, struct proc *p);
1053 int p_cansee(struct thread *td, struct proc *p);
1054 int p_cansched(struct thread *td, struct proc *p);
1055 int p_cansignal(struct thread *td, struct proc *p, int signum);
1056 int p_canwait(struct thread *td, struct proc *p);
1057 struct pargs *pargs_alloc(int len);
1058 void pargs_drop(struct pargs *pa);
1059 void pargs_hold(struct pargs *pa);
1060 int proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb);
1061 int proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb);
1062 int proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb);
1063 void procinit(void);
1064 void proc_linkup0(struct proc *p, struct thread *td);
1065 void proc_linkup(struct proc *p, struct thread *td);
1066 struct proc *proc_realparent(struct proc *child);
1067 void proc_reap(struct thread *td, struct proc *p, int *status, int options);
1068 void proc_reparent(struct proc *child, struct proc *newparent);
1069 void proc_set_traced(struct proc *p, bool stop);
1070 struct pstats *pstats_alloc(void);
1071 void pstats_fork(struct pstats *src, struct pstats *dst);
1072 void pstats_free(struct pstats *ps);
1073 void reaper_abandon_children(struct proc *p, bool exiting);
1074 int securelevel_ge(struct ucred *cr, int level);
1075 int securelevel_gt(struct ucred *cr, int level);
1076 void sess_hold(struct session *);
1077 void sess_release(struct session *);
1078 int setrunnable(struct thread *);
1079 void setsugid(struct proc *p);
1080 int should_yield(void);
1081 int sigonstack(size_t sp);
1082 void stopevent(struct proc *, u_int, u_int);
1083 struct thread *tdfind(lwpid_t, pid_t);
1084 void threadinit(void);
1085 void tidhash_add(struct thread *);
1086 void tidhash_remove(struct thread *);
1088 int cpu_idle_wakeup(int);
1089 extern void (*cpu_idle_hook)(sbintime_t); /* Hook to machdep CPU idler. */
1090 void cpu_switch(struct thread *, struct thread *, struct mtx *);
1091 void cpu_throw(struct thread *, struct thread *) __dead2;
1092 void unsleep(struct thread *);
1093 void userret(struct thread *, struct trapframe *);
1095 void cpu_exit(struct thread *);
1096 void exit1(struct thread *, int, int) __dead2;
1097 void cpu_copy_thread(struct thread *td, struct thread *td0);
1098 int cpu_fetch_syscall_args(struct thread *td);
1099 void cpu_fork(struct thread *, struct proc *, struct thread *, int);
1100 void cpu_fork_kthread_handler(struct thread *, void (*)(void *), void *);
1101 void cpu_set_syscall_retval(struct thread *, int);
1102 void cpu_set_upcall(struct thread *, void (*)(void *), void *,
1104 int cpu_set_user_tls(struct thread *, void *tls_base);
1105 void cpu_thread_alloc(struct thread *);
1106 void cpu_thread_clean(struct thread *);
1107 void cpu_thread_exit(struct thread *);
1108 void cpu_thread_free(struct thread *);
1109 void cpu_thread_swapin(struct thread *);
1110 void cpu_thread_swapout(struct thread *);
1111 struct thread *thread_alloc(int pages);
1112 int thread_alloc_stack(struct thread *, int pages);
1113 void thread_cow_get_proc(struct thread *newtd, struct proc *p);
1114 void thread_cow_get(struct thread *newtd, struct thread *td);
1115 void thread_cow_free(struct thread *td);
1116 void thread_cow_update(struct thread *td);
1117 int thread_create(struct thread *td, struct rtprio *rtp,
1118 int (*initialize_thread)(struct thread *, void *), void *thunk);
1119 void thread_exit(void) __dead2;
1120 void thread_free(struct thread *td);
1121 void thread_link(struct thread *td, struct proc *p);
1122 void thread_reap(void);
1123 int thread_single(struct proc *p, int how);
1124 void thread_single_end(struct proc *p, int how);
1125 void thread_stash(struct thread *td);
1126 void thread_stopped(struct proc *p);
1127 void childproc_stopped(struct proc *child, int reason);
1128 void childproc_continued(struct proc *child);
1129 void childproc_exited(struct proc *child);
1130 int thread_suspend_check(int how);
1131 bool thread_suspend_check_needed(void);
1132 void thread_suspend_switch(struct thread *, struct proc *p);
1133 void thread_suspend_one(struct thread *td);
1134 void thread_unlink(struct thread *td);
1135 void thread_unsuspend(struct proc *p);
1136 void thread_wait(struct proc *p);
1137 struct thread *thread_find(struct proc *p, lwpid_t tid);
1139 void stop_all_proc(void);
1140 void resume_all_proc(void);
1143 curthread_pflags_set(int flags)
1149 save = ~flags | (td->td_pflags & flags);
1150 td->td_pflags |= flags;
1154 static __inline void
1155 curthread_pflags_restore(int save)
1158 curthread->td_pflags &= save;
1161 static __inline __pure2 struct td_sched *
1162 td_get_sched(struct thread *td)
1165 return ((struct td_sched *)&td[1]);
1168 extern void (*softdep_ast_cleanup)(struct thread *);
1169 static __inline void
1170 td_softdep_cleanup(struct thread *td)
1173 if (td->td_su != NULL && softdep_ast_cleanup != NULL)
1174 softdep_ast_cleanup(td);
1177 #endif /* _KERNEL */
1179 #endif /* !_SYS_PROC_H_ */