1 /*-
2 * Copyright (c) 1986, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 * (c) UNIX System Laboratories, Inc.
5 * All or some portions of this file are derived from material licensed
6 * to the University of California by American Telephone and Telegraph
7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
8 * the permission of UNIX System Laboratories, Inc.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * @(#)proc.h 8.15 (Berkeley) 5/19/95
35 * $FreeBSD: stable/10/sys/sys/proc.h 318743 2017-05-23 12:40:50Z badger $
36 */
37
38 #ifndef _SYS_PROC_H_
39 #define _SYS_PROC_H_
40
41 #include <sys/callout.h> /* For struct callout. */
42 #include <sys/event.h> /* For struct klist. */
43 #include <sys/condvar.h>
44 #ifndef _KERNEL
45 #include <sys/filedesc.h>
46 #endif
47 #include <sys/queue.h>
48 #include <sys/_lock.h>
49 #include <sys/lock_profile.h>
50 #include <sys/_mutex.h>
51 #include <sys/osd.h>
52 #include <sys/priority.h>
53 #include <sys/rtprio.h> /* XXX. */
54 #include <sys/runq.h>
55 #include <sys/resource.h>
56 #include <sys/sigio.h>
57 #include <sys/signal.h>
58 #include <sys/signalvar.h>
59 #ifndef _KERNEL
60 #include <sys/time.h> /* For structs itimerval, timeval. */
61 #else
62 #include <sys/pcpu.h>
63 #endif
64 #include <sys/ucontext.h>
65 #include <sys/ucred.h>
66 #include <machine/proc.h> /* Machine-dependent proc substruct. */
67
68 /*
69 * One structure allocated per session.
70 *
71 * List of locks
72 * (m) locked by s_mtx mtx
73 * (e) locked by proctree_lock sx
74 * (c) const until freeing
75 */
76 struct session {
77 u_int s_count; /* Ref cnt; pgrps in session - atomic. */
78 struct proc *s_leader; /* (m + e) Session leader. */
79 struct vnode *s_ttyvp; /* (m) Vnode of controlling tty. */
80 struct cdev_priv *s_ttydp; /* (m) Device of controlling tty. */
81 struct tty *s_ttyp; /* (e) Controlling tty. */
82 pid_t s_sid; /* (c) Session ID. */
83 /* (m) Setlogin() name: */
84 char s_login[roundup(MAXLOGNAME, sizeof(long))];
85 struct mtx s_mtx; /* Mutex to protect members. */
86 };
87
88 /*
89 * One structure allocated per process group.
90 *
91 * List of locks
92 * (m) locked by pg_mtx mtx
93 * (e) locked by proctree_lock sx
94 * (c) const until freeing
95 */
96 struct pgrp {
97 LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */
98 LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */
99 struct session *pg_session; /* (c) Pointer to session. */
100 struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */
101 pid_t pg_id; /* (c) Process group id. */
102 int pg_jobc; /* (m) Job control process count. */
103 struct mtx pg_mtx; /* Mutex to protect members */
104 };
105
106 /*
107 * pargs, used to hold a copy of the command line, if it had a sane length.
108 */
109 struct pargs {
110 u_int ar_ref; /* Reference count. */
111 u_int ar_length; /* Length. */
112 u_char ar_args[1]; /* Arguments. */
113 };
114
115 /*-
116 * Description of a process.
117 *
118 * This structure contains the information needed to manage a thread of
119 * control, known in UN*X as a process; it has references to substructures
120 * containing descriptions of things that the process uses, but may share
121 * with related processes. The process structure and the substructures
122 * are always addressable except for those marked "(CPU)" below,
123 * which might be addressable only on a processor on which the process
124 * is running.
125 *
126 * Below is a key of locks used to protect each member of struct proc. The
127 * lock is indicated by a reference to a specific character in parens in the
128 * associated comment.
129 * * - not yet protected
130 * a - only touched by curproc or parent during fork/wait
131 * b - created at fork, never changes
132 * (exception aiods switch vmspaces, but they are also
133 * marked 'P_SYSTEM' so hopefully it will be left alone)
134 * c - locked by proc mtx
135 * d - locked by allproc_lock lock
136 * e - locked by proctree_lock lock
137 * f - session mtx
138 * g - process group mtx
139 * h - callout_lock mtx
140 * i - by curproc or the master session mtx
141 * j - locked by proc slock
142 * k - only accessed by curthread
143 * k*- only accessed by curthread and from an interrupt
144 * l - the attaching proc or attaching proc parent
145 * m - Giant
146 * n - not locked, lazy
147 * o - ktrace lock
148 * q - td_contested lock
149 * r - p_peers lock
150 * t - thread lock
151 * x - created at fork, only changes during single threading in exec
152 * y - created at first aio, doesn't change until exit or exec at which
153 * point we are single-threaded and only curthread changes it
154 * z - zombie threads lock
155 *
156 * If the locking key specifies two identifiers (for example, p_pptr) then
157 * either lock is sufficient for read access, but both locks must be held
158 * for write access.
159 */
160 struct cpuset;
161 struct filemon;
162 struct kaioinfo;
163 struct kaudit_record;
164 struct kdtrace_proc;
165 struct kdtrace_thread;
166 struct mqueue_notifier;
167 struct nlminfo;
168 struct p_sched;
169 struct proc;
170 struct procdesc;
171 struct racct;
172 struct sbuf;
173 struct sleepqueue;
174 struct syscall_args;
175 struct td_sched;
176 struct thread;
177 struct trapframe;
178 struct turnstile;
179
180 /*
181 * XXX: Does this belong in resource.h or resourcevar.h instead?
182 * Resource usage extension. The times in rusage structs in the kernel are
183 * never up to date. The actual times are kept as runtimes and tick counts
184 * (with control info in the "previous" times), and are converted when
185 * userland asks for rusage info. Backwards compatibility prevents putting
186 * this directly in the user-visible rusage struct.
187 *
188 * Locking for p_rux: (cj) means (j) for p_rux and (c) for p_crux.
189 * Locking for td_rux: (t) for all fields.
190 */
191 struct rusage_ext {
192 uint64_t rux_runtime; /* (cj) Real time. */
193 uint64_t rux_uticks; /* (cj) Statclock hits in user mode. */
194 uint64_t rux_sticks; /* (cj) Statclock hits in sys mode. */
195 uint64_t rux_iticks; /* (cj) Statclock hits in intr mode. */
196 uint64_t rux_uu; /* (c) Previous user time in usec. */
197 uint64_t rux_su; /* (c) Previous sys time in usec. */
198 uint64_t rux_tu; /* (c) Previous total time in usec. */
199 };
200
201 /*
202 * Kernel runnable context (thread).
203 * This is what is put to sleep and reactivated.
204 * Thread context. Processes may have multiple threads.
205 */
206 struct thread {
207 struct mtx *volatile td_lock; /* replaces sched lock */
208 struct proc *td_proc; /* (*) Associated process. */
209 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */
210 TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */
211 TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */
212 TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */
213 LIST_ENTRY(thread) td_hash; /* (d) Hash chain. */
214 struct cpuset *td_cpuset; /* (t) CPU affinity mask. */
215 struct seltd *td_sel; /* Select queue/channel. */
216 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */
217 struct turnstile *td_turnstile; /* (k) Associated turnstile. */
218 struct rl_q_entry *td_rlqe; /* (k) Associated range lock entry. */
219 struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */
220 lwpid_t td_tid; /* (b) Thread ID. */
221 uint64_t padding1[4];
222 void *padding2[4];
223 u_char td_lend_user_pri; /* (t) Lend user pri. */
224
225 /* Cleared during fork1() */
226 #define td_startzero td_flags
227 int td_flags; /* (t) TDF_* flags. */
228 int td_inhibitors; /* (t) Why can not run. */
229 int td_pflags; /* (k) Private thread (TDP_*) flags. */
230 int td_dupfd; /* (k) Ret value from fdopen. XXX */
231 int td_sqqueue; /* (t) Sleepqueue queue blocked on. */
232 void *td_wchan; /* (t) Sleep address. */
233 const char *td_wmesg; /* (t) Reason for sleep. */
234 u_char td_lastcpu; /* (t) Last cpu we were on. */
235 u_char td_oncpu; /* (t) Which cpu we are on. */
236 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */
237 u_char td_tsqueue; /* (t) Turnstile queue blocked on. */
238 short td_locks; /* (k) Count of non-spin locks. */
239 short td_rw_rlocks; /* (k) Count of rwlock read locks. */
240 short td_lk_slocks; /* (k) Count of lockmgr shared locks. */
241 short td_stopsched; /* (k) Scheduler stopped. */
242 struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */
243 const char *td_lockname; /* (t) Name of lock blocked on. */
244 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */
245 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */
246 int td_intr_nesting_level; /* (k) Interrupt recursion. */
247 int td_pinned; /* (k) Temporary cpu pin count. */
248 struct ucred *td_ucred; /* (k) Reference to credentials. */
249 u_int td_estcpu; /* (t) estimated cpu utilization */
250 int td_slptick; /* (t) Time at sleep. */
251 int td_blktick; /* (t) Time spent blocked. */
252 int td_swvoltick; /* (t) Time at last SW_VOL switch. */
253 u_int td_cow; /* (*) Number of copy-on-write faults */
254 struct rusage td_ru; /* (t) rusage information. */
255 struct rusage_ext td_rux; /* (t) Internal rusage information. */
256 uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */
257 uint64_t td_runtime; /* (t) How many cpu ticks we've run. */
258 u_int td_pticks; /* (t) Statclock hits for profiling */
259 u_int td_sticks; /* (t) Statclock hits in system mode. */
260 u_int td_iticks; /* (t) Statclock hits in intr mode. */
261 u_int td_uticks; /* (t) Statclock hits in user mode. */
262 int td_intrval; /* (t) Return value for sleepq. */
263 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */
264 volatile u_int td_generation; /* (k) For detection of preemption */
265 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */
266 int td_xsig; /* (c) Signal for ptrace */
267 u_long td_profil_addr; /* (k) Temporary addr until AST. */
268 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */
269 char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */
270 struct file *td_fpop; /* (k) file referencing cdev under op */
271 int td_dbgflags; /* (c) Userland debugger flags */
272 struct ksiginfo td_dbgksi; /* (c) ksi reflected to debugger. */
273 int td_ng_outbound; /* (k) Thread entered ng from above. */
274 struct osd td_osd; /* (k) Object specific data. */
275 struct vm_map_entry *td_map_def_user; /* (k) Deferred entries. */
276 pid_t td_dbg_forked; /* (c) Child pid for debugger. */
277 u_int td_vp_reserv; /* (k) Count of reserved vnodes. */
278 int td_no_sleeping; /* (k) Sleeping disabled count. */
279 int td_dom_rr_idx; /* (k) RR Numa domain selection. */
280 #define td_endzero td_sigmask
281
282 /* Copied during fork1() or create_thread(). */
283 #define td_startcopy td_endzero
284 sigset_t td_sigmask; /* (c) Current signal mask. */
285 u_char td_rqindex; /* (t) Run queue index. */
286 u_char td_base_pri; /* (t) Thread base kernel priority. */
287 u_char td_priority; /* (t) Thread active priority. */
288 u_char td_pri_class; /* (t) Scheduling class. */
289 u_char td_user_pri; /* (t) User pri from estcpu and nice. */
290 u_char td_base_user_pri; /* (t) Base user pri */
291 #define td_endcopy td_pcb
292
293 /*
294 * Fields that must be manually set in fork1() or create_thread()
295 * or already have been set in the allocator, constructor, etc.
296 */
297 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */
298 enum {
299 TDS_INACTIVE = 0x0,
300 TDS_INHIBITED,
301 TDS_CAN_RUN,
302 TDS_RUNQ,
303 TDS_RUNNING
304 } td_state; /* (t) thread state */
305 register_t td_retval[2]; /* (k) Syscall aux returns. */
306 struct callout td_slpcallout; /* (h) Callout for sleep. */
307 struct trapframe *td_frame; /* (k) */
308 struct vm_object *td_kstack_obj;/* (a) Kstack object. */
309 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */
310 int td_kstack_pages; /* (a) Size of the kstack. */
311 volatile u_int td_critnest; /* (k*) Critical section nest level. */
312 struct mdthread td_md; /* (k) Any machine-dependent fields. */
313 struct td_sched *td_sched; /* (*) Scheduler-specific data. */
314 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */
315 struct lpohead td_lprof[2]; /* (a) lock profiling objects. */
316 struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */
317 int td_errno; /* Error returned by last syscall. */
318 struct vnet *td_vnet; /* (k) Effective vnet. */
319 const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */
320 struct trapframe *td_intr_frame;/* (k) Frame of the current irq */
321 struct proc *td_rfppwait_p; /* (k) The vforked child */
322 struct vm_page **td_ma; /* (k) uio pages held */
323 int td_ma_cnt; /* (k) size of *td_ma */
324 void *td_su; /* (k) FFS SU private */
325 u_int td_dbg_sc_code; /* (c) Syscall code to debugger. */
326 u_int td_dbg_sc_narg; /* (c) Syscall arg count to debugger.*/
327 void *td_emuldata; /* Emulator state data */
328 sbintime_t td_sleeptimo; /* (t) Sleep timeout. */
329 sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */
330 #define td_siglist td_sigqueue.sq_signals
331 };
332
333 struct mtx *thread_lock_block(struct thread *);
334 void thread_lock_unblock(struct thread *, struct mtx *);
335 void thread_lock_set(struct thread *, struct mtx *);
336 #define THREAD_LOCK_ASSERT(td, type) \
337 do { \
338 struct mtx *__m = (td)->td_lock; \
339 if (__m != &blocked_lock) \
340 mtx_assert(__m, (type)); \
341 } while (0)
342
343 #ifdef INVARIANTS
344 #define THREAD_LOCKPTR_ASSERT(td, lock) \
345 do { \
346 struct mtx *__m = (td)->td_lock; \
347 KASSERT((__m == &blocked_lock || __m == (lock)), \
348 ("Thread %p lock %p does not match %p", td, __m, (lock))); \
349 } while (0)
350 #else
351 #define THREAD_LOCKPTR_ASSERT(td, lock)
352 #endif
353
354 /*
355 * Flags kept in td_flags:
356 * To change these you MUST have the scheduler lock.
357 */
358 #define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */
359 #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */
360 #define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */
361 #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */
362 #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */
363 #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */
364 #define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */
365 #define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */
366 #define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */
367 #define TDF_ALLPROCSUSP 0x00000200 /* suspended by SINGLE_ALLPROC */
368 #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */
369 #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */
370 #define TDF_UNUSED12 0x00001000 /* --available-- */
371 #define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */
372 #define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */
373 #define TDF_NEEDSUSPCHK 0x00008000 /* Thread may need to suspend. */
374 #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */
375 #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */
376 #define TDF_NOLOAD 0x00040000 /* Ignore during load avg calculations. */
377 #define TDF_UNUSED19 0x00080000 /* --available-- */
378 #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */
379 #define TDF_UNUSED21 0x00200000 /* --available-- */
380 #define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */
381 #define TDF_UNUSED23 0x00800000 /* --available-- */
382 #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */
383 #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */
384 #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */
385 #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */
386 #define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */
387 #define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */
388 #define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */
389
390 /* Userland debug flags */
391 #define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */
392 #define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */
393 #define TDB_USERWR 0x00000004 /* Debugger modified memory or registers */
394 #define TDB_SCE 0x00000008 /* Thread performs syscall enter */
395 #define TDB_SCX 0x00000010 /* Thread performs syscall exit */
396 #define TDB_EXEC 0x00000020 /* TDB_SCX from exec(2) family */
397 #define TDB_FORK 0x00000040 /* TDB_SCX from fork(2) that created new
398 process */
399 #define TDB_STOPATFORK 0x00000080 /* Stop at the return from fork (child
400 only) */
401 #define TDB_CHILD 0x00000100 /* New child indicator for ptrace() */
402 #define TDB_BORN 0x00000200 /* New LWP indicator for ptrace() */
403 #define TDB_EXIT 0x00000400 /* Exiting LWP indicator for ptrace() */
404 #define TDB_VFORK 0x00000800 /* vfork indicator for ptrace() */
405 #define TDB_FSTP 0x00001000 /* The thread is PT_ATTACH leader */
406
407 /*
408 * "Private" flags kept in td_pflags:
409 * These are only written by curthread and thus need no locking.
410 */
411 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */
412 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */
413 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */
414 #define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */
415 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */
416 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */
417 #define TDP_DEADLKTREAT 0x00000040 /* Lock acquisition - deadlock treatment. */
418 #define TDP_NOFAULTING 0x00000080 /* Do not handle page faults. */
419 #define TDP_UNUSED9 0x00000100 /* --available-- */
420 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */
421 #define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */
422 #define TDP_SYNCIO 0x00000800 /* Local override, disable async i/o. */
423 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */
424 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */
425 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */
426 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */
427 #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */
428 #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */
429 #define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */
430 #define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */
431 #define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */
432 #define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */
433 #define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */
434 #define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */
435 #define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */
436 #define TDP_RFPPWAIT 0x02000000 /* Handle RFPPWAIT on syscall exit */
437 #define TDP_RESETSPUR 0x04000000 /* Reset spurious page fault history. */
438 #define TDP_NERRNO 0x08000000 /* Last errno is already in td_errno */
439 #define TDP_UIOHELD 0x10000000 /* Current uio has pages held in td_ma */
440 #define TDP_UNUSED29 0x20000000 /* --available-- */
441 #define TDP_EXECVMSPC 0x40000000 /* Execve destroyed old vmspace */
442
443 /*
444 * Reasons that the current thread can not be run yet.
445 * More than one may apply.
446 */
447 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */
448 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */
449 #define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */
450 #define TDI_LOCK 0x0008 /* Stopped on a lock. */
451 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */
452
453 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING)
454 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL)
455 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED)
456 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED)
457 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK)
458 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT)
459 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING)
460 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ)
461 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN)
462 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED)
463 #define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED)
464 #define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD)
465
466 #define KTDSTATE(td) \
467 (((td)->td_inhibitors & TDI_SLEEPING) != 0 ? "sleep" : \
468 ((td)->td_inhibitors & TDI_SUSPENDED) != 0 ? "suspended" : \
469 ((td)->td_inhibitors & TDI_SWAPPED) != 0 ? "swapped" : \
470 ((td)->td_inhibitors & TDI_LOCK) != 0 ? "blocked" : \
471 ((td)->td_inhibitors & TDI_IWAIT) != 0 ? "iwait" : "yielding")
472
473 #define TD_SET_INHIB(td, inhib) do { \
474 (td)->td_state = TDS_INHIBITED; \
475 (td)->td_inhibitors |= (inhib); \
476 } while (0)
477
478 #define TD_CLR_INHIB(td, inhib) do { \
479 if (((td)->td_inhibitors & (inhib)) && \
480 (((td)->td_inhibitors &= ~(inhib)) == 0)) \
481 (td)->td_state = TDS_CAN_RUN; \
482 } while (0)
483
484 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING)
485 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED)
486 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK)
487 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED)
488 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT)
489 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING)
490
491 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING)
492 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED)
493 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK)
494 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED)
495 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT)
496
497 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING
498 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ
499 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN
500
501 /*
502 * Process structure.
503 */
504 struct proc {
505 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */
506 TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */
507 struct mtx p_slock; /* process spin lock */
508 struct ucred *p_ucred; /* (c) Process owner's identity. */
509 struct filedesc *p_fd; /* (b) Open files. */
510 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */
511 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */
512 struct plimit *p_limit; /* (c) Process limits. */
513 struct callout p_limco; /* (c) Limit callout handle */
514 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */
515
516 int p_flag; /* (c) P_* flags. */
517 int p_flag2; /* (c) P2_* flags. */
518 enum {
519 PRS_NEW = 0, /* In creation */
520 PRS_NORMAL, /* threads can be run. */
521 PRS_ZOMBIE
522 } p_state; /* (j/c) Process status. */
523 pid_t p_pid; /* (b) Process identifier. */
524 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */
525 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */
526 struct proc *p_pptr; /* (c + e) Pointer to parent process. */
527 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */
528 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */
529 struct mtx p_mtx; /* (n) Lock for this struct. */
530 struct ksiginfo *p_ksi; /* Locked by parent proc lock */
531 uint64_t padding1[4];
532 void *padding2[4];
533
534 /* The following fields are all zeroed upon creation in fork. */
535 #define p_startzero p_oppid
536 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */
537 struct vmspace *p_vmspace; /* (b) Address space. */
538 u_int p_swtick; /* (c) Tick when swapped in or out. */
539 struct itimerval p_realtimer; /* (c) Alarm timer. */
540 struct rusage p_ru; /* (a) Exit information. */
541 struct rusage_ext p_rux; /* (cj) Internal resource usage. */
542 struct rusage_ext p_crux; /* (c) Internal child resource usage. */
543 int p_profthreads; /* (c) Num threads in addupc_task. */
544 volatile int p_exitthreads; /* (j) Number of threads exiting */
545 int p_traceflag; /* (o) Kernel trace points. */
546 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */
547 struct ucred *p_tracecred; /* (o) Credentials to trace with. */
548 struct vnode *p_textvp; /* (b) Vnode of executable. */
549 u_int p_lock; /* (c) Proclock (prevent swap) count. */
550 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */
551 int p_sigparent; /* (c) Signal to parent on exit. */
552 int p_sig; /* (n) For core dump/debugger XXX. */
553 u_long p_code; /* (n) For core dump/debugger XXX. */
554 u_int p_stops; /* (c) Stop event bitmask. */
555 u_int p_stype; /* (c) Stop event type. */
556 char p_step; /* (c) Process is stopped. */
557 u_char p_pfsflags; /* (c) Procfs flags. */
558 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */
559 struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */
560 struct thread *p_singlethread;/* (c + j) If single threading this is it */
561 int p_suspcount; /* (j) Num threads in suspended mode. */
562 struct thread *p_xthread; /* (c) Trap thread */
563 int p_boundary_count;/* (j) Num threads at user boundary */
564 int p_pendingcnt; /* how many signals are pending */
565 struct itimers *p_itimers; /* (c) POSIX interval timers. */
566 struct procdesc *p_procdesc; /* (e) Process descriptor, if any. */
567 int p_pendingexits; /* (c) Count of pending thread exits. */
568 /* End area that is zeroed on creation. */
569 #define p_endzero p_magic
570
571 /* The following fields are all copied upon creation in fork. */
572 #define p_startcopy p_endzero
573 u_int p_magic; /* (b) Magic number. */
574 int p_osrel; /* (x) osreldate for the
575 binary (from ELF note, if any) */
576 char p_comm[MAXCOMLEN + 1]; /* (x) Process name. */
577 void *p_pad0;
578 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */
579 struct pargs *p_args; /* (c) Process arguments. */
580 rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */
581 signed char p_nice; /* (c) Process "nice" value. */
582 int p_fibnum; /* in this routing domain XXX MRT */
583
584 /* End area that is copied on creation. */
585 #define p_endcopy p_xstat
586
587 u_short p_xstat; /* (c) Exit status; also stop sig. */
588 struct knlist p_klist; /* (c) Knotes attached to this proc. */
589 int p_numthreads; /* (c) Number of threads. */
590 struct mdproc p_md; /* Any machine-dependent fields. */
591 struct callout p_itcallout; /* (h + c) Interval timer callout. */
592 u_short p_acflag; /* (c) Accounting flags. */
593 struct proc *p_peers; /* (r) */
594 struct proc *p_leader; /* (b) */
595 void *p_emuldata; /* (c) Emulator state data. */
596 struct label *p_label; /* (*) Proc (not subject) MAC label. */
597 struct p_sched *p_sched; /* (*) Scheduler-specific data. */
598 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */
599 LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/
600 struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */
601 struct cv p_pwait; /* (*) wait cv for exit/exec. */
602 struct cv p_dbgwait; /* (*) wait cv for debugger attach
603 after fork. */
604 uint64_t p_prev_runtime; /* (c) Resource usage accounting. */
605 struct racct *p_racct; /* (b) Resource accounting. */
606 u_char p_throttled; /* (c) Flag for racct pcpu throttling */
607 /*
608 * An orphan is the child that has beed re-parented to the
609 * debugger as a result of attaching to it. Need to keep
610 * track of them for parent to be able to collect the exit
611 * status of what used to be children.
612 */
613 LIST_ENTRY(proc) p_orphan; /* (e) List of orphan processes. */
614 LIST_HEAD(, proc) p_orphans; /* (e) Pointer to list of orphans. */
615 u_int p_treeflag; /* (e) P_TREE flags */
616 struct proc *p_reaper; /* (e) My reaper. */
617 LIST_HEAD(, proc) p_reaplist; /* (e) List of my descendants
618 (if I am reaper). */
619 LIST_ENTRY(proc) p_reapsibling; /* (e) List of siblings - descendants of
620 the same reaper. */
621 pid_t p_reapsubtree; /* (e) Pid of the direct child of the
622 reaper which spawned
623 our subtree. */
624 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */
625 struct filemon *p_filemon; /* (c) filemon-specific data. */
626 u_int p_ptevents; /* (c) ptrace() event mask. */
627 uint16_t p_elf_machine; /* (x) ELF machine type */
628 uint64_t p_elf_flags; /* (x) ELF flags */
629 sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */
630 #define p_siglist p_sigqueue.sq_signals
631 };
632
633 #define p_session p_pgrp->pg_session
634 #define p_pgid p_pgrp->pg_id
635
636 #define NOCPU 0xff /* For when we aren't on a CPU. */
637
638 #define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock)
639 #define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock)
640 #define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type))
641
642 #define PROC_STATLOCK(p) mtx_lock_spin(&(p)->p_slock)
643 #define PROC_STATUNLOCK(p) mtx_unlock_spin(&(p)->p_slock)
644 #define PROC_STATLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type))
645
646 #define PROC_ITIMLOCK(p) mtx_lock_spin(&(p)->p_slock)
647 #define PROC_ITIMUNLOCK(p) mtx_unlock_spin(&(p)->p_slock)
648 #define PROC_ITIMLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type))
649
650 #define PROC_PROFLOCK(p) mtx_lock_spin(&(p)->p_slock)
651 #define PROC_PROFUNLOCK(p) mtx_unlock_spin(&(p)->p_slock)
652 #define PROC_PROFLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type))
653
654 /* These flags are kept in p_flag. */
655 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
656 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */
657 #define P_KTHREAD 0x00004 /* Kernel thread (*). */
658 #define P_UNUSED3 0x00008 /* --available-- */
659 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
660 #define P_PROFIL 0x00020 /* Has started profiling. */
661 #define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */
662 #define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */
663 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */
664 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
665 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */
666 #define P_TRACED 0x00800 /* Debugged process being traced. */
667 #define P_WAITED 0x01000 /* Someone is waiting for us. */
668 #define P_WEXIT 0x02000 /* Working on exiting. */
669 #define P_EXEC 0x04000 /* Process called exec. */
670 #define P_WKILLED 0x08000 /* Killed, go to kernel/user boundary ASAP. */
671 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */
672 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */
673 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */
674 #define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */
675 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */
676 #define P_SIGEVENT 0x200000 /* Process pending signals changed. */
677 #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */
678 #define P_HWPMC 0x800000 /* Process is using HWPMCs */
679 #define P_JAILED 0x1000000 /* Process is in jail. */
680 #define P_TOTAL_STOP 0x2000000 /* Stopped in proc_stop_total. */
681 #define P_INEXEC 0x4000000 /* Process is in execve(). */
682 #define P_STATCHILD 0x8000000 /* Child process stopped or exited. */
683 #define P_INMEM 0x10000000 /* Loaded into memory. */
684 #define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */
685 #define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */
686 #define P_PPTRACE 0x80000000 /* PT_TRACEME by vforked child. */
687
688 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE)
689 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED)
690 #define P_KILLED(p) ((p)->p_flag & P_WKILLED)
691
692 /* These flags are kept in p_flag2. */
693 #define P2_INHERIT_PROTECTED 0x00000001 /* New children get P_PROTECTED. */
694 #define P2_NOTRACE 0x00000002 /* No ptrace(2) attach or coredumps. */
695 #define P2_NOTRACE_EXEC 0x00000004 /* Keep P2_NOPTRACE on exec(2). */
696 #define P2_AST_SU 0x00000008 /* Handles SU ast for kthreads. */
697 #define P2_PTRACE_FSTP 0x00000010 /* SIGSTOP from PT_ATTACH not yet handled. */
698
699 /* Flags protected by proctree_lock, kept in p_treeflags. */
700 #define P_TREE_ORPHANED 0x00000001 /* Reparented, on orphan list */
701 #define P_TREE_FIRST_ORPHAN 0x00000002 /* First element of orphan
702 list */
703 #define P_TREE_REAPER 0x00000004 /* Reaper of subtree */
704
705 /*
706 * These were process status values (p_stat), now they are only used in
707 * legacy conversion code.
708 */
709 #define SIDL 1 /* Process being created by fork. */
710 #define SRUN 2 /* Currently runnable. */
711 #define SSLEEP 3 /* Sleeping on an address. */
712 #define SSTOP 4 /* Process debugging or suspension. */
713 #define SZOMB 5 /* Awaiting collection by parent. */
714 #define SWAIT 6 /* Waiting for interrupt. */
715 #define SLOCK 7 /* Blocked on a lock. */
716
717 #define P_MAGIC 0xbeefface
718
719 #ifdef _KERNEL
720
721 /* Types and flags for mi_switch(). */
722 #define SW_TYPE_MASK 0xff /* First 8 bits are switch type */
723 #define SWT_NONE 0 /* Unspecified switch. */
724 #define SWT_PREEMPT 1 /* Switching due to preemption. */
725 #define SWT_OWEPREEMPT 2 /* Switching due to owepreempt. */
726 #define SWT_TURNSTILE 3 /* Turnstile contention. */
727 #define SWT_SLEEPQ 4 /* Sleepq wait. */
728 #define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */
729 #define SWT_RELINQUISH 6 /* yield call. */
730 #define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */
731 #define SWT_IDLE 8 /* Switching from the idle thread. */
732 #define SWT_IWAIT 9 /* Waiting for interrupts. */
733 #define SWT_SUSPEND 10 /* Thread suspended. */
734 #define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */
735 #define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */
736 #define SWT_COUNT 13 /* Number of switch types. */
737 /* Flags */
738 #define SW_VOL 0x0100 /* Voluntary switch. */
739 #define SW_INVOL 0x0200 /* Involuntary switch. */
740 #define SW_PREEMPT 0x0400 /* The invol switch is a preemption */
741
742 /* How values for thread_single(). */
743 #define SINGLE_NO_EXIT 0
744 #define SINGLE_EXIT 1
745 #define SINGLE_BOUNDARY 2
746 #define SINGLE_ALLPROC 3
747
748 #ifdef MALLOC_DECLARE
749 MALLOC_DECLARE(M_PARGS);
750 MALLOC_DECLARE(M_PGRP);
751 MALLOC_DECLARE(M_SESSION);
752 MALLOC_DECLARE(M_SUBPROC);
753 #endif
754
755 #define FOREACH_PROC_IN_SYSTEM(p) \
756 LIST_FOREACH((p), &allproc, p_list)
757 #define FOREACH_THREAD_IN_PROC(p, td) \
758 TAILQ_FOREACH((td), &(p)->p_threads, td_plist)
759
760 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads)
761
762 /*
763 * We use process IDs <= pid_max <= PID_MAX; PID_MAX + 1 must also fit
764 * in a pid_t, as it is used to represent "no process group".
765 */
766 #define PID_MAX 99999
767 #define NO_PID 100000
768 extern pid_t pid_max;
769
770 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
771
772
773 #define STOPEVENT(p, e, v) do { \
774 if ((p)->p_stops & (e)) { \
775 PROC_LOCK(p); \
776 stopevent((p), (e), (v)); \
777 PROC_UNLOCK(p); \
778 } \
779 } while (0)
780 #define _STOPEVENT(p, e, v) do { \
781 PROC_LOCK_ASSERT(p, MA_OWNED); \
782 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.lock_object, \
783 "checking stopevent %d", (e)); \
784 if ((p)->p_stops & (e)) \
785 stopevent((p), (e), (v)); \
786 } while (0)
787
788 /* Lock and unlock a process. */
789 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx)
790 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx)
791 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx)
792 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx)
793 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type))
794
795 /* Lock and unlock a process group. */
796 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx)
797 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx)
798 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx)
799 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type))
800
801 #define PGRP_LOCK_PGSIGNAL(pg) do { \
802 if ((pg) != NULL) \
803 PGRP_LOCK(pg); \
804 } while (0)
805 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \
806 if ((pg) != NULL) \
807 PGRP_UNLOCK(pg); \
808 } while (0)
809
810 /* Lock and unlock a session. */
811 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx)
812 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx)
813 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx)
814 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type))
815
816 /* Hold process U-area in memory, normally for ptrace/procfs work. */
817 #define PHOLD(p) do { \
818 PROC_LOCK(p); \
819 _PHOLD(p); \
820 PROC_UNLOCK(p); \
821 } while (0)
822 #define _PHOLD(p) do { \
823 PROC_LOCK_ASSERT((p), MA_OWNED); \
824 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \
825 ("PHOLD of exiting process")); \
826 (p)->p_lock++; \
827 if (((p)->p_flag & P_INMEM) == 0) \
828 faultin((p)); \
829 } while (0)
830 #define PROC_ASSERT_HELD(p) do { \
831 KASSERT((p)->p_lock > 0, ("process not held")); \
832 } while (0)
833
834 #define PRELE(p) do { \
835 PROC_LOCK((p)); \
836 _PRELE((p)); \
837 PROC_UNLOCK((p)); \
838 } while (0)
839 #define _PRELE(p) do { \
840 PROC_LOCK_ASSERT((p), MA_OWNED); \
841 PROC_ASSERT_HELD(p); \
842 (--(p)->p_lock); \
843 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \
844 wakeup(&(p)->p_lock); \
845 } while (0)
846 #define PROC_ASSERT_NOT_HELD(p) do { \
847 KASSERT((p)->p_lock == 0, ("process held")); \
848 } while (0)
849
850 /* Check whether a thread is safe to be swapped out. */
851 #define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP)
852
853 /* Control whether or not it is safe for curthread to sleep. */
854 #define THREAD_NO_SLEEPING() ((curthread)->td_no_sleeping++)
855
856 #define THREAD_SLEEPING_OK() ((curthread)->td_no_sleeping--)
857
858 #define THREAD_CAN_SLEEP() ((curthread)->td_no_sleeping == 0)
859
860 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
861 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
862 extern u_long pidhash;
863 #define TIDHASH(tid) (&tidhashtbl[(tid) & tidhash])
864 extern LIST_HEAD(tidhashhead, thread) *tidhashtbl;
865 extern u_long tidhash;
866 extern struct rwlock tidhash_lock;
867
868 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
869 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
870 extern u_long pgrphash;
871
872 extern struct sx allproc_lock;
873 extern int allproc_gen;
874 extern struct sx proctree_lock;
875 extern struct mtx ppeers_lock;
876 extern struct proc proc0; /* Process slot for swapper. */
877 extern struct thread thread0; /* Primary thread in proc0. */
878 extern struct vmspace vmspace0; /* VM space for proc0. */
879 extern int hogticks; /* Limit on kernel cpu hogs. */
880 extern int lastpid;
881 extern int nprocs, maxproc; /* Current and max number of procs. */
882 extern int maxprocperuid; /* Max procs per uid. */
883 extern u_long ps_arg_cache_limit;
884
885 LIST_HEAD(proclist, proc);
886 TAILQ_HEAD(procqueue, proc);
887 TAILQ_HEAD(threadqueue, thread);
888 extern struct proclist allproc; /* List of all processes. */
889 extern struct proclist zombproc; /* List of zombie processes. */
890 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */
891
892 extern struct uma_zone *proc_zone;
893
894 struct proc *pfind(pid_t); /* Find process by id. */
895 struct proc *pfind_locked(pid_t pid);
896 struct pgrp *pgfind(pid_t); /* Find process group by id. */
897 struct proc *zpfind(pid_t); /* Find zombie process by id. */
898
899 /*
900 * pget() flags.
901 */
902 #define PGET_HOLD 0x00001 /* Hold the process. */
903 #define PGET_CANSEE 0x00002 /* Check against p_cansee(). */
904 #define PGET_CANDEBUG 0x00004 /* Check against p_candebug(). */
905 #define PGET_ISCURRENT 0x00008 /* Check that the found process is current. */
906 #define PGET_NOTWEXIT 0x00010 /* Check that the process is not in P_WEXIT. */
907 #define PGET_NOTINEXEC 0x00020 /* Check that the process is not in P_INEXEC. */
908 #define PGET_NOTID 0x00040 /* Do not assume tid if pid > PID_MAX. */
909
910 #define PGET_WANTREAD (PGET_HOLD | PGET_CANDEBUG | PGET_NOTWEXIT)
911
912 int pget(pid_t pid, int flags, struct proc **pp);
913
914 void ast(struct trapframe *framep);
915 struct thread *choosethread(void);
916 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum);
917 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp,
918 struct session *sess);
919 int enterthispgrp(struct proc *p, struct pgrp *pgrp);
920 void faultin(struct proc *p);
921 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering);
922 int fork1(struct thread *, int, int, struct proc **, int *, int);
923 void fork_exit(void (*)(void *, struct trapframe *), void *,
924 struct trapframe *);
925 void fork_return(struct thread *, struct trapframe *);
926 int inferior(struct proc *p);
927 void kern_yield(int);
928 void kick_proc0(void);
929 int leavepgrp(struct proc *p);
930 int maybe_preempt(struct thread *td);
931 void maybe_yield(void);
932 void mi_switch(int flags, struct thread *newtd);
933 int p_candebug(struct thread *td, struct proc *p);
934 int p_cansee(struct thread *td, struct proc *p);
935 int p_cansched(struct thread *td, struct proc *p);
936 int p_cansignal(struct thread *td, struct proc *p, int signum);
937 int p_canwait(struct thread *td, struct proc *p);
938 struct pargs *pargs_alloc(int len);
939 void pargs_drop(struct pargs *pa);
940 void pargs_hold(struct pargs *pa);
941 int proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb);
942 int proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb);
943 int proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb);
944 void procinit(void);
945 void proc_linkup0(struct proc *p, struct thread *td);
946 void proc_linkup(struct proc *p, struct thread *td);
947 struct proc *proc_realparent(struct proc *child);
948 void proc_reap(struct thread *td, struct proc *p, int *status, int options);
949 void proc_reparent(struct proc *child, struct proc *newparent);
950 void proc_set_traced(struct proc *p, bool stop);
951 struct pstats *pstats_alloc(void);
952 void pstats_fork(struct pstats *src, struct pstats *dst);
953 void pstats_free(struct pstats *ps);
954 void reaper_abandon_children(struct proc *p, bool exiting);
955 int securelevel_ge(struct ucred *cr, int level);
956 int securelevel_gt(struct ucred *cr, int level);
957 void sess_hold(struct session *);
958 void sess_release(struct session *);
959 int setrunnable(struct thread *);
960 void setsugid(struct proc *p);
961 int should_yield(void);
962 int sigonstack(size_t sp);
963 void stopevent(struct proc *, u_int, u_int);
964 struct thread *tdfind(lwpid_t, pid_t);
965 void threadinit(void);
966 void tidhash_add(struct thread *);
967 void tidhash_remove(struct thread *);
968 void cpu_idle(int);
969 int cpu_idle_wakeup(int);
970 extern void (*cpu_idle_hook)(sbintime_t); /* Hook to machdep CPU idler. */
971 void cpu_switch(struct thread *, struct thread *, struct mtx *);
972 void cpu_throw(struct thread *, struct thread *) __dead2;
973 void unsleep(struct thread *);
974 void userret(struct thread *, struct trapframe *);
975
976 void cpu_exit(struct thread *);
977 void exit1(struct thread *, int) __dead2;
978 int cpu_fetch_syscall_args(struct thread *td, struct syscall_args *sa);
979 void cpu_fork(struct thread *, struct proc *, struct thread *, int);
980 void cpu_set_fork_handler(struct thread *, void (*)(void *), void *);
981 void cpu_set_syscall_retval(struct thread *, int);
982 void cpu_set_upcall(struct thread *td, struct thread *td0);
983 void cpu_set_upcall_kse(struct thread *, void (*)(void *), void *,
984 stack_t *);
985 int cpu_set_user_tls(struct thread *, void *tls_base);
986 void cpu_thread_alloc(struct thread *);
987 void cpu_thread_clean(struct thread *);
988 void cpu_thread_exit(struct thread *);
989 void cpu_thread_free(struct thread *);
990 void cpu_thread_swapin(struct thread *);
991 void cpu_thread_swapout(struct thread *);
992 struct thread *thread_alloc(int pages);
993 int thread_alloc_stack(struct thread *, int pages);
994 int thread_create(struct thread *td, struct rtprio *rtp,
995 int (*initialize_thread)(struct thread *, void *), void *thunk);
996 void thread_exit(void) __dead2;
997 void thread_free(struct thread *td);
998 void thread_link(struct thread *td, struct proc *p);
999 void thread_reap(void);
1000 int thread_single(struct proc *p, int how);
1001 void thread_single_end(struct proc *p, int how);
1002 void thread_stash(struct thread *td);
1003 void thread_stopped(struct proc *p);
1004 void childproc_stopped(struct proc *child, int reason);
1005 void childproc_continued(struct proc *child);
1006 void childproc_exited(struct proc *child);
1007 int thread_suspend_check(int how);
1008 bool thread_suspend_check_needed(void);
1009 void thread_suspend_switch(struct thread *, struct proc *p);
1010 void thread_suspend_one(struct thread *td);
1011 void thread_unlink(struct thread *td);
1012 void thread_unsuspend(struct proc *p);
1013 void thread_wait(struct proc *p);
1014 struct thread *thread_find(struct proc *p, lwpid_t tid);
1015
1016 void stop_all_proc(void);
1017 void resume_all_proc(void);
1018
1019 static __inline int
curthread_pflags_set(int flags)1020 curthread_pflags_set(int flags)
1021 {
1022 struct thread *td;
1023 int save;
1024
1025 td = curthread;
1026 save = ~flags | (td->td_pflags & flags);
1027 td->td_pflags |= flags;
1028 return (save);
1029 }
1030
1031 static __inline void
curthread_pflags_restore(int save)1032 curthread_pflags_restore(int save)
1033 {
1034
1035 curthread->td_pflags &= save;
1036 }
1037
1038 #endif /* _KERNEL */
1039
1040 #endif /* !_SYS_PROC_H_ */
1041