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34 * @(#)proc.h 8.15 (Berkeley) 5/19/95
41 #include <sys/callout.h> /* For struct callout. */
42 #include <sys/event.h> /* For struct klist. */
43 #include <sys/condvar.h>
45 #include <sys/filedesc.h>
47 #include <sys/queue.h>
48 #include <sys/_lock.h>
49 #include <sys/lock_profile.h>
50 #include <sys/_mutex.h>
52 #include <sys/priority.h>
53 #include <sys/rtprio.h> /* XXX. */
55 #include <sys/resource.h>
56 #include <sys/sigio.h>
57 #include <sys/signal.h>
58 #include <sys/signalvar.h>
60 #include <sys/time.h> /* For structs itimerval, timeval. */
64 #include <sys/ucontext.h>
65 #include <sys/ucred.h>
66 #include <machine/proc.h> /* Machine-dependent proc substruct. */
69 * One structure allocated per session.
72 * (m) locked by s_mtx mtx
73 * (e) locked by proctree_lock sx
74 * (c) const until freeing
77 u_int s_count; /* Ref cnt; pgrps in session - atomic. */
78 struct proc *s_leader; /* (m + e) Session leader. */
79 struct vnode *s_ttyvp; /* (m) Vnode of controlling tty. */
80 struct cdev_priv *s_ttydp; /* (m) Device of controlling tty. */
81 struct tty *s_ttyp; /* (e) Controlling tty. */
82 pid_t s_sid; /* (c) Session ID. */
83 /* (m) Setlogin() name: */
84 char s_login[roundup(MAXLOGNAME, sizeof(long))];
85 struct mtx s_mtx; /* Mutex to protect members. */
89 * One structure allocated per process group.
92 * (m) locked by pg_mtx mtx
93 * (e) locked by proctree_lock sx
94 * (c) const until freeing
97 LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */
98 LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */
99 struct session *pg_session; /* (c) Pointer to session. */
100 struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */
101 pid_t pg_id; /* (c) Process group id. */
102 int pg_jobc; /* (m) Job control process count. */
103 struct mtx pg_mtx; /* Mutex to protect members */
107 * pargs, used to hold a copy of the command line, if it had a sane length.
110 u_int ar_ref; /* Reference count. */
111 u_int ar_length; /* Length. */
112 u_char ar_args[1]; /* Arguments. */
116 * Description of a process.
118 * This structure contains the information needed to manage a thread of
119 * control, known in UN*X as a process; it has references to substructures
120 * containing descriptions of things that the process uses, but may share
121 * with related processes. The process structure and the substructures
122 * are always addressable except for those marked "(CPU)" below,
123 * which might be addressable only on a processor on which the process
126 * Below is a key of locks used to protect each member of struct proc. The
127 * lock is indicated by a reference to a specific character in parens in the
128 * associated comment.
129 * * - not yet protected
130 * a - only touched by curproc or parent during fork/wait
131 * b - created at fork, never changes
132 * (exception aiods switch vmspaces, but they are also
133 * marked 'P_SYSTEM' so hopefully it will be left alone)
134 * c - locked by proc mtx
135 * d - locked by allproc_lock lock
136 * e - locked by proctree_lock lock
138 * g - process group mtx
139 * h - callout_lock mtx
140 * i - by curproc or the master session mtx
141 * j - locked by proc slock
142 * k - only accessed by curthread
143 * k*- only accessed by curthread and from an interrupt
144 * l - the attaching proc or attaching proc parent
146 * n - not locked, lazy
148 * q - td_contested lock
151 * x - created at fork, only changes during single threading in exec
152 * y - created at first aio, doesn't change until exit or exec at which
153 * point we are single-threaded and only curthread changes it
154 * z - zombie threads lock
156 * If the locking key specifies two identifiers (for example, p_pptr) then
157 * either lock is sufficient for read access, but both locks must be held
160 struct kaudit_record;
170 struct mqueue_notifier;
172 struct kdtrace_thread;
176 * Kernel runnable context (thread).
177 * This is what is put to sleep and reactivated.
178 * Thread context. Processes may have multiple threads.
181 struct mtx *volatile td_lock; /* replaces sched lock */
182 struct proc *td_proc; /* (*) Associated process. */
183 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */
184 TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */
185 TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */
186 TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */
187 struct cpuset *td_cpuset; /* (t) CPU affinity mask. */
188 struct seltd *td_sel; /* Select queue/channel. */
189 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */
190 struct turnstile *td_turnstile; /* (k) Associated turnstile. */
191 struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */
192 lwpid_t td_tid; /* (b) Thread ID. */
193 sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */
194 #define td_siglist td_sigqueue.sq_signals
196 /* Cleared during fork1() */
197 #define td_startzero td_flags
198 int td_flags; /* (t) TDF_* flags. */
199 int td_inhibitors; /* (t) Why can not run. */
200 int td_pflags; /* (k) Private thread (TDP_*) flags. */
201 int td_dupfd; /* (k) Ret value from fdopen. XXX */
202 int td_sqqueue; /* (t) Sleepqueue queue blocked on. */
203 void *td_wchan; /* (t) Sleep address. */
204 const char *td_wmesg; /* (t) Reason for sleep. */
205 u_char td_lastcpu; /* (t) Last cpu we were on. */
206 u_char td_oncpu; /* (t) Which cpu we are on. */
207 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */
208 u_char td_tsqueue; /* (t) Turnstile queue blocked on. */
209 short td_locks; /* (k) Count of non-spin locks. */
210 short td_rw_rlocks; /* (k) Count of rwlock read locks. */
211 short td_lk_slocks; /* (k) Count of lockmgr shared locks. */
212 struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */
213 const char *td_lockname; /* (t) Name of lock blocked on. */
214 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */
215 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
216 int td_intr_nesting_level; /* (k) Interrupt recursion. */
217 int td_pinned; /* (k) Temporary cpu pin count. */
218 struct ucred *td_ucred; /* (k) Reference to credentials. */
219 u_int td_estcpu; /* (t) estimated cpu utilization */
220 u_int td_slptick; /* (t) Time at sleep. */
221 struct rusage td_ru; /* (t) rusage information */
222 uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */
223 uint64_t td_runtime; /* (t) How many cpu ticks we've run. */
224 u_int td_pticks; /* (t) Statclock hits for profiling */
225 u_int td_sticks; /* (t) Statclock hits in system mode. */
226 u_int td_iticks; /* (t) Statclock hits in intr mode. */
227 u_int td_uticks; /* (t) Statclock hits in user mode. */
228 int td_intrval; /* (t) Return value for sleepq. */
229 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */
230 sigset_t td_sigmask; /* (c) Current signal mask. */
231 volatile u_int td_generation; /* (k) For detection of preemption */
232 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */
233 int td_xsig; /* (c) Signal for ptrace */
234 u_long td_profil_addr; /* (k) Temporary addr until AST. */
235 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */
236 char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */
237 struct file *td_fpop; /* (k) file referencing cdev under op */
238 int td_dbgflags; /* (c) Userland debugger flags */
239 int td_ng_outbound; /* (k) Thread entered ng from above. */
240 struct osd td_osd; /* (k) Object specific data. */
241 #define td_endzero td_base_pri
243 /* Copied during fork1() or thread_sched_upcall(). */
244 #define td_startcopy td_endzero
245 u_char td_rqindex; /* (t) Run queue index. */
246 u_char td_base_pri; /* (t) Thread base kernel priority. */
247 u_char td_priority; /* (t) Thread active priority. */
248 u_char td_pri_class; /* (t) Scheduling class. */
249 u_char td_user_pri; /* (t) User pri from estcpu and nice. */
250 u_char td_base_user_pri; /* (t) Base user pri */
251 #define td_endcopy td_pcb
254 * Fields that must be manually set in fork1() or thread_sched_upcall()
255 * or already have been set in the allocator, constructor, etc.
257 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
264 } td_state; /* (t) thread state */
265 register_t td_retval[2]; /* (k) Syscall aux returns. */
266 struct callout td_slpcallout; /* (h) Callout for sleep. */
267 struct trapframe *td_frame; /* (k) */
268 struct vm_object *td_kstack_obj;/* (a) Kstack object. */
269 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
270 int td_kstack_pages; /* (a) Size of the kstack. */
271 volatile u_int td_critnest; /* (k*) Critical section nest level. */
272 struct mdthread td_md; /* (k) Any machine-dependent fields. */
273 struct td_sched *td_sched; /* (*) Scheduler-specific data. */
274 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */
275 int td_syscalls; /* per-thread syscall count (used by NFS :)) */
276 struct lpohead td_lprof[2]; /* (a) lock profiling objects. */
277 struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */
278 int td_errno; /* Error returned by last syscall. */
279 struct vnet *td_vnet; /* (k) Effective vnet. */
280 const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */
283 struct mtx *thread_lock_block(struct thread *);
284 void thread_lock_unblock(struct thread *, struct mtx *);
285 void thread_lock_set(struct thread *, struct mtx *);
286 #define THREAD_LOCK_ASSERT(td, type) \
288 struct mtx *__m = (td)->td_lock; \
289 if (__m != &blocked_lock) \
290 mtx_assert(__m, (type)); \
294 #define THREAD_LOCKPTR_ASSERT(td, lock) \
296 struct mtx *__m = (td)->td_lock; \
297 KASSERT((__m == &blocked_lock || __m == (lock)), \
298 ("Thread %p lock %p does not match %p", td, __m, (lock))); \
301 #define THREAD_LOCKPTR_ASSERT(td, lock)
305 * Flags kept in td_flags:
306 * To change these you MUST have the scheduler lock.
308 #define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */
309 #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */
310 #define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */
311 #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */
312 #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */
313 #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */
314 #define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */
315 #define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */
316 #define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */
317 #define TDF_UBORROWING 0x00000200 /* Thread is borrowing user pri. */
318 #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */
319 #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */
320 #define TDF_TIMOFAIL 0x00001000 /* Timeout from sleep after we were awake. */
321 #define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */
322 #define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */
323 #define TDF_NEEDSUSPCHK 0x00008000 /* Thread may need to suspend. */
324 #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */
325 #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */
326 #define TDF_NOLOAD 0x00040000 /* Ignore during load avg calculations. */
327 #define TDF_UNUSED19 0x00080000 /* Thread is sleeping on a umtx. */
328 #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */
329 #define TDF_UNUSED21 0x00200000 /* --available-- */
330 #define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */
331 #define TDF_UNUSED23 0x00800000 /* --available-- */
332 #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */
333 #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */
334 #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */
335 #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */
336 #define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */
337 #define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */
338 #define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */
340 /* Userland debug flags */
341 #define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */
342 #define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */
345 * "Private" flags kept in td_pflags:
346 * These are only written by curthread and thus need no locking.
348 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */
349 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */
350 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */
351 #define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */
352 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */
353 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */
354 #define TDP_DEADLKTREAT 0x00000040 /* Lock aquisition - deadlock treatment. */
355 #define TDP_UNUSED80 0x00000080 /* available. */
356 #define TDP_NOSLEEPING 0x00000100 /* Thread is not allowed to sleep on a sq. */
357 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */
358 #define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */
359 #define TDP_UNUSED800 0x00000800 /* available. */
360 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */
361 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */
362 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */
363 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */
364 #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */
365 #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */
366 #define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */
367 #define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */
368 #define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */
369 #define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */
370 #define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */
371 #define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */
372 #define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */
375 * Reasons that the current thread can not be run yet.
376 * More than one may apply.
378 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */
379 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
380 #define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */
381 #define TDI_LOCK 0x0008 /* Stopped on a lock. */
382 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
384 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
385 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
386 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
387 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
388 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
389 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
390 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
391 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
392 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
393 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
394 #define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED)
395 #define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD)
398 #define TD_SET_INHIB(td, inhib) do { \
399 (td)->td_state = TDS_INHIBITED; \
400 (td)->td_inhibitors |= (inhib); \
403 #define TD_CLR_INHIB(td, inhib) do { \
404 if (((td)->td_inhibitors & (inhib)) && \
405 (((td)->td_inhibitors &= ~(inhib)) == 0)) \
406 (td)->td_state = TDS_CAN_RUN; \
409 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
410 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
411 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
412 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
413 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
414 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
416 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
417 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
418 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
419 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
420 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
422 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING
423 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ
424 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN
427 * XXX: Does this belong in resource.h or resourcevar.h instead?
428 * Resource usage extension. The times in rusage structs in the kernel are
429 * never up to date. The actual times are kept as runtimes and tick counts
430 * (with control info in the "previous" times), and are converted when
431 * userland asks for rusage info. Backwards compatibility prevents putting
432 * this directly in the user-visible rusage struct.
434 * Locking: (cj) means (j) for p_rux and (c) for p_crux.
437 u_int64_t rux_runtime; /* (cj) Real time. */
438 u_int64_t rux_uticks; /* (cj) Statclock hits in user mode. */
439 u_int64_t rux_sticks; /* (cj) Statclock hits in sys mode. */
440 u_int64_t rux_iticks; /* (cj) Statclock hits in intr mode. */
441 u_int64_t rux_uu; /* (c) Previous user time in usec. */
442 u_int64_t rux_su; /* (c) Previous sys time in usec. */
443 u_int64_t rux_tu; /* (c) Previous total time in usec. */
450 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
451 TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */
452 struct mtx p_slock; /* process spin lock */
453 struct ucred *p_ucred; /* (c) Process owner's identity. */
454 struct filedesc *p_fd; /* (b) Open files. */
455 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */
456 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
457 struct plimit *p_limit; /* (c) Process limits. */
458 struct callout p_limco; /* (c) Limit callout handle */
459 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */
462 * The following don't make too much sense.
463 * See the td_ or ke_ versions of the same flags.
465 int p_flag; /* (c) P_* flags. */
467 PRS_NEW = 0, /* In creation */
468 PRS_NORMAL, /* threads can be run. */
470 } p_state; /* (j/c) S* process status. */
471 pid_t p_pid; /* (b) Process identifier. */
472 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
473 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
474 struct proc *p_pptr; /* (c + e) Pointer to parent process. */
475 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
476 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
477 struct mtx p_mtx; /* (n) Lock for this struct. */
478 struct ksiginfo *p_ksi; /* Locked by parent proc lock */
479 sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */
480 #define p_siglist p_sigqueue.sq_signals
482 /* The following fields are all zeroed upon creation in fork. */
483 #define p_startzero p_oppid
484 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */
485 struct vmspace *p_vmspace; /* (b) Address space. */
486 u_int p_swtick; /* (c) Tick when swapped in or out. */
487 struct itimerval p_realtimer; /* (c) Alarm timer. */
488 struct rusage p_ru; /* (a) Exit information. */
489 struct rusage_ext p_rux; /* (cj) Internal resource usage. */
490 struct rusage_ext p_crux; /* (c) Internal child resource usage. */
491 int p_profthreads; /* (c) Num threads in addupc_task. */
492 volatile int p_exitthreads; /* (j) Number of threads exiting */
493 int p_traceflag; /* (o) Kernel trace points. */
494 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */
495 struct ucred *p_tracecred; /* (o) Credentials to trace with. */
496 struct vnode *p_textvp; /* (b) Vnode of executable. */
497 u_int p_lock; /* (c) Proclock (prevent swap) count. */
498 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
499 int p_sigparent; /* (c) Signal to parent on exit. */
500 int p_sig; /* (n) For core dump/debugger XXX. */
501 u_long p_code; /* (n) For core dump/debugger XXX. */
502 u_int p_stops; /* (c) Stop event bitmask. */
503 u_int p_stype; /* (c) Stop event type. */
504 char p_step; /* (c) Process is stopped. */
505 u_char p_pfsflags; /* (c) Procfs flags. */
506 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
507 struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */
508 struct thread *p_singlethread;/* (c + j) If single threading this is it */
509 int p_suspcount; /* (j) Num threads in suspended mode. */
510 struct thread *p_xthread; /* (c) Trap thread */
511 int p_boundary_count;/* (c) Num threads at user boundary */
512 int p_pendingcnt; /* how many signals are pending */
513 struct itimers *p_itimers; /* (c) POSIX interval timers. */
514 /* End area that is zeroed on creation. */
515 #define p_endzero p_magic
517 /* The following fields are all copied upon creation in fork. */
518 #define p_startcopy p_endzero
519 u_int p_magic; /* (b) Magic number. */
520 int p_osrel; /* (x) osreldate for the
521 binary (from ELF note, if any) */
522 char p_comm[MAXCOMLEN + 1]; /* (b) Process name. */
523 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
524 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
525 struct pargs *p_args; /* (c) Process arguments. */
526 rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */
527 signed char p_nice; /* (c) Process "nice" value. */
528 int p_fibnum; /* in this routing domain XXX MRT */
529 /* End area that is copied on creation. */
530 #define p_endcopy p_xstat
532 u_short p_xstat; /* (c) Exit status; also stop sig. */
533 struct knlist p_klist; /* (c) Knotes attached to this proc. */
534 int p_numthreads; /* (c) Number of threads. */
535 struct mdproc p_md; /* Any machine-dependent fields. */
536 struct callout p_itcallout; /* (h + c) Interval timer callout. */
537 u_short p_acflag; /* (c) Accounting flags. */
538 struct proc *p_peers; /* (r) */
539 struct proc *p_leader; /* (b) */
540 void *p_emuldata; /* (c) Emulator state data. */
541 struct label *p_label; /* (*) Proc (not subject) MAC label. */
542 struct p_sched *p_sched; /* (*) Scheduler-specific data. */
543 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */
544 LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/
545 struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */
546 struct cv p_pwait; /* (*) wait cv for exit/exec */
549 #define p_session p_pgrp->pg_session
550 #define p_pgid p_pgrp->pg_id
552 #define NOCPU 0xff /* For when we aren't on a CPU. */
554 #define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock)
555 #define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock)
556 #define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type))
558 /* These flags are kept in p_flag. */
559 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
560 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
561 #define P_KTHREAD 0x00004 /* Kernel thread (*). */
562 #define P_UNUSED0 0x00008 /* available. */
563 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
564 #define P_PROFIL 0x00020 /* Has started profiling. */
565 #define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */
566 #define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */
567 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
568 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
569 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */
570 #define P_TRACED 0x00800 /* Debugged process being traced. */
571 #define P_WAITED 0x01000 /* Someone is waiting for us. */
572 #define P_WEXIT 0x02000 /* Working on exiting. */
573 #define P_EXEC 0x04000 /* Process called exec. */
574 #define P_UNUSED8000 0x08000 /* available. */
575 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
576 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */
577 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */
578 #define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */
579 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
580 #define P_SIGEVENT 0x200000 /* Process pending signals changed. */
581 #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */
582 #define P_HWPMC 0x800000 /* Process is using HWPMCs */
584 #define P_JAILED 0x1000000 /* Process is in jail. */
585 #define P_INEXEC 0x4000000 /* Process is in execve(). */
586 #define P_STATCHILD 0x8000000 /* Child process stopped or exited. */
587 #define P_INMEM 0x10000000 /* Loaded into memory. */
588 #define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */
589 #define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */
591 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
592 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
595 * These were process status values (p_stat), now they are only used in
596 * legacy conversion code.
598 #define SIDL 1 /* Process being created by fork. */
599 #define SRUN 2 /* Currently runnable. */
600 #define SSLEEP 3 /* Sleeping on an address. */
601 #define SSTOP 4 /* Process debugging or suspension. */
602 #define SZOMB 5 /* Awaiting collection by parent. */
603 #define SWAIT 6 /* Waiting for interrupt. */
604 #define SLOCK 7 /* Blocked on a lock. */
606 #define P_MAGIC 0xbeefface
610 /* Types and flags for mi_switch(). */
611 #define SW_TYPE_MASK 0xff /* First 8 bits are switch type */
612 #define SWT_NONE 0 /* Unspecified switch. */
613 #define SWT_PREEMPT 1 /* Switching due to preemption. */
614 #define SWT_OWEPREEMPT 2 /* Switching due to opepreempt. */
615 #define SWT_TURNSTILE 3 /* Turnstile contention. */
616 #define SWT_SLEEPQ 4 /* Sleepq wait. */
617 #define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */
618 #define SWT_RELINQUISH 6 /* yield call. */
619 #define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */
620 #define SWT_IDLE 8 /* Switching from the idle thread. */
621 #define SWT_IWAIT 9 /* Waiting for interrupts. */
622 #define SWT_SUSPEND 10 /* Thread suspended. */
623 #define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */
624 #define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */
625 #define SWT_COUNT 13 /* Number of switch types. */
627 #define SW_VOL 0x0100 /* Voluntary switch. */
628 #define SW_INVOL 0x0200 /* Involuntary switch. */
629 #define SW_PREEMPT 0x0400 /* The invol switch is a preemption */
631 /* How values for thread_single(). */
632 #define SINGLE_NO_EXIT 0
633 #define SINGLE_EXIT 1
634 #define SINGLE_BOUNDARY 2
636 #ifdef MALLOC_DECLARE
637 MALLOC_DECLARE(M_PARGS);
638 MALLOC_DECLARE(M_PGRP);
639 MALLOC_DECLARE(M_SESSION);
640 MALLOC_DECLARE(M_SUBPROC);
641 MALLOC_DECLARE(M_ZOMBIE);
644 #define FOREACH_PROC_IN_SYSTEM(p) \
645 LIST_FOREACH((p), &allproc, p_list)
646 #define FOREACH_THREAD_IN_PROC(p, td) \
647 TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
649 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads)
652 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
653 * as it is used to represent "no process group".
655 #define PID_MAX 99999
656 #define NO_PID 100000
658 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
661 #define STOPEVENT(p, e, v) do { \
662 if ((p)->p_stops & (e)) { \
664 stopevent((p), (e), (v)); \
668 #define _STOPEVENT(p, e, v) do { \
669 PROC_LOCK_ASSERT(p, MA_OWNED); \
670 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.lock_object, \
671 "checking stopevent %d", (e)); \
672 if ((p)->p_stops & (e)) \
673 stopevent((p), (e), (v)); \
676 /* Lock and unlock a process. */
677 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
678 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
679 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
680 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
681 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
683 /* Lock and unlock a process group. */
684 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
685 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
686 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
687 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
689 #define PGRP_LOCK_PGSIGNAL(pg) do { \
693 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \
698 /* Lock and unlock a session. */
699 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
700 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
701 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
702 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
704 /* Hold process U-area in memory, normally for ptrace/procfs work. */
705 #define PHOLD(p) do { \
710 #define _PHOLD(p) do { \
711 PROC_LOCK_ASSERT((p), MA_OWNED); \
712 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \
713 ("PHOLD of exiting process")); \
715 if (((p)->p_flag & P_INMEM) == 0) \
718 #define PROC_ASSERT_HELD(p) do { \
719 KASSERT((p)->p_lock > 0, ("process not held")); \
722 #define PRELE(p) do { \
727 #define _PRELE(p) do { \
728 PROC_LOCK_ASSERT((p), MA_OWNED); \
730 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \
731 wakeup(&(p)->p_lock); \
733 #define PROC_ASSERT_NOT_HELD(p) do { \
734 KASSERT((p)->p_lock == 0, ("process held")); \
737 /* Check whether a thread is safe to be swapped out. */
738 #define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP)
740 /* Control whether or not it is safe for curthread to sleep. */
741 #define THREAD_NO_SLEEPING() do { \
742 KASSERT(!(curthread->td_pflags & TDP_NOSLEEPING), \
743 ("nested no sleeping")); \
744 curthread->td_pflags |= TDP_NOSLEEPING; \
747 #define THREAD_SLEEPING_OK() do { \
748 KASSERT((curthread->td_pflags & TDP_NOSLEEPING), \
749 ("nested sleeping ok")); \
750 curthread->td_pflags &= ~TDP_NOSLEEPING; \
753 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
754 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
755 extern u_long pidhash;
757 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
758 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
759 extern u_long pgrphash;
761 extern struct sx allproc_lock;
762 extern struct sx proctree_lock;
763 extern struct mtx ppeers_lock;
764 extern struct proc proc0; /* Process slot for swapper. */
765 extern struct thread thread0; /* Primary thread in proc0. */
766 extern struct vmspace vmspace0; /* VM space for proc0. */
767 extern int hogticks; /* Limit on kernel cpu hogs. */
769 extern int nprocs, maxproc; /* Current and max number of procs. */
770 extern int maxprocperuid; /* Max procs per uid. */
771 extern u_long ps_arg_cache_limit;
773 LIST_HEAD(proclist, proc);
774 TAILQ_HEAD(procqueue, proc);
775 TAILQ_HEAD(threadqueue, thread);
776 extern struct proclist allproc; /* List of all processes. */
777 extern struct proclist zombproc; /* List of zombie processes. */
778 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
780 extern struct uma_zone *proc_zone;
782 struct proc *pfind(pid_t); /* Find process by id. */
783 struct pgrp *pgfind(pid_t); /* Find process group by id. */
784 struct proc *zpfind(pid_t); /* Find zombie process by id. */
786 void ast(struct trapframe *framep);
787 struct thread *choosethread(void);
788 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
789 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp,
790 struct session *sess);
791 int enterthispgrp(struct proc *p, struct pgrp *pgrp);
792 void faultin(struct proc *p);
793 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
794 int fork1(struct thread *, int, int, struct proc **);
795 void fork_exit(void (*)(void *, struct trapframe *), void *,
797 void fork_return(struct thread *, struct trapframe *);
798 int inferior(struct proc *p);
799 void kick_proc0(void);
800 int leavepgrp(struct proc *p);
801 int maybe_preempt(struct thread *td);
802 void mi_switch(int flags, struct thread *newtd);
803 int p_candebug(struct thread *td, struct proc *p);
804 int p_cansee(struct thread *td, struct proc *p);
805 int p_cansched(struct thread *td, struct proc *p);
806 int p_cansignal(struct thread *td, struct proc *p, int signum);
807 int p_canwait(struct thread *td, struct proc *p);
808 struct pargs *pargs_alloc(int len);
809 void pargs_drop(struct pargs *pa);
810 void pargs_hold(struct pargs *pa);
812 void proc_linkup0(struct proc *p, struct thread *td);
813 void proc_linkup(struct proc *p, struct thread *td);
814 void proc_reparent(struct proc *child, struct proc *newparent);
815 struct pstats *pstats_alloc(void);
816 void pstats_fork(struct pstats *src, struct pstats *dst);
817 void pstats_free(struct pstats *ps);
818 int securelevel_ge(struct ucred *cr, int level);
819 int securelevel_gt(struct ucred *cr, int level);
820 void sess_hold(struct session *);
821 void sess_release(struct session *);
822 int setrunnable(struct thread *);
823 void setsugid(struct proc *p);
824 int sigonstack(size_t sp);
825 void sleepinit(void);
826 void stopevent(struct proc *, u_int, u_int);
827 void threadinit(void);
829 int cpu_idle_wakeup(int);
830 extern void (*cpu_idle_hook)(void); /* Hook to machdep CPU idler. */
831 void cpu_switch(struct thread *, struct thread *, struct mtx *);
832 void cpu_throw(struct thread *, struct thread *) __dead2;
833 void unsleep(struct thread *);
834 void userret(struct thread *, struct trapframe *);
836 void cpu_exit(struct thread *);
837 void exit1(struct thread *, int) __dead2;
838 void cpu_fork(struct thread *, struct proc *, struct thread *, int);
839 void cpu_set_fork_handler(struct thread *, void (*)(void *), void *);
840 void cpu_set_syscall_retval(struct thread *, int);
841 void cpu_set_upcall(struct thread *td, struct thread *td0);
842 void cpu_set_upcall_kse(struct thread *, void (*)(void *), void *,
844 int cpu_set_user_tls(struct thread *, void *tls_base);
845 void cpu_thread_alloc(struct thread *);
846 void cpu_thread_clean(struct thread *);
847 void cpu_thread_exit(struct thread *);
848 void cpu_thread_free(struct thread *);
849 void cpu_thread_swapin(struct thread *);
850 void cpu_thread_swapout(struct thread *);
851 struct thread *thread_alloc(int pages);
852 int thread_alloc_stack(struct thread *, int pages);
853 void thread_exit(void) __dead2;
854 void thread_free(struct thread *td);
855 void thread_link(struct thread *td, struct proc *p);
856 void thread_reap(void);
857 int thread_single(int how);
858 void thread_single_end(void);
859 void thread_stash(struct thread *td);
860 void thread_stopped(struct proc *p);
861 void childproc_stopped(struct proc *child, int reason);
862 void childproc_continued(struct proc *child);
863 void childproc_exited(struct proc *child);
864 int thread_suspend_check(int how);
865 void thread_suspend_switch(struct thread *);
866 void thread_suspend_one(struct thread *td);
867 void thread_unlink(struct thread *td);
868 void thread_unsuspend(struct proc *p);
869 int thread_unsuspend_one(struct thread *td);
870 void thread_unthread(struct thread *td);
871 void thread_wait(struct proc *p);
872 struct thread *thread_find(struct proc *p, lwpid_t tid);
873 void thr_exit1(void);
877 #endif /* !_SYS_PROC_H_ */