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 * $FreeBSD$ 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 kaudit_record; 161 struct td_sched; 162 struct nlminfo; 163 struct kaioinfo; 164 struct p_sched; 165 struct proc; 166 struct sleepqueue; 167 struct thread; 168 struct trapframe; 169 struct turnstile; 170 struct mqueue_notifier; 171 struct kdtrace_proc; 172 struct kdtrace_thread; 173 struct cpuset; 174 175 /* 176 * XXX: Does this belong in resource.h or resourcevar.h instead? 177 * Resource usage extension. The times in rusage structs in the kernel are 178 * never up to date. The actual times are kept as runtimes and tick counts 179 * (with control info in the "previous" times), and are converted when 180 * userland asks for rusage info. Backwards compatibility prevents putting 181 * this directly in the user-visible rusage struct. 182 * 183 * Locking for p_rux: (cj) means (j) for p_rux and (c) for p_crux. 184 * Locking for td_rux: (t) for all fields. 185 */ 186 struct rusage_ext { 187 u_int64_t rux_runtime; /* (cj) Real time. */ 188 u_int64_t rux_uticks; /* (cj) Statclock hits in user mode. */ 189 u_int64_t rux_sticks; /* (cj) Statclock hits in sys mode. */ 190 u_int64_t rux_iticks; /* (cj) Statclock hits in intr mode. */ 191 u_int64_t rux_uu; /* (c) Previous user time in usec. */ 192 u_int64_t rux_su; /* (c) Previous sys time in usec. */ 193 u_int64_t rux_tu; /* (c) Previous total time in usec. */ 194 }; 195 196 /* 197 * Kernel runnable context (thread). 198 * This is what is put to sleep and reactivated. 199 * Thread context. Processes may have multiple threads. 200 */ 201 struct thread { 202 struct mtx *volatile td_lock; /* replaces sched lock */ 203 struct proc *td_proc; /* (*) Associated process. */ 204 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */ 205 TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */ 206 TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */ 207 TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */ 208 struct cpuset *td_cpuset; /* (t) CPU affinity mask. */ 209 struct seltd *td_sel; /* Select queue/channel. */ 210 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */ 211 struct turnstile *td_turnstile; /* (k) Associated turnstile. */ 212 struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */ 213 lwpid_t td_tid; /* (b) Thread ID. */ 214 sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */ 215 #define td_siglist td_sigqueue.sq_signals 216 217 /* Cleared during fork1() */ 218 #define td_startzero td_flags 219 int td_flags; /* (t) TDF_* flags. */ 220 int td_inhibitors; /* (t) Why can not run. */ 221 int td_pflags; /* (k) Private thread (TDP_*) flags. */ 222 int td_dupfd; /* (k) Ret value from fdopen. XXX */ 223 int td_sqqueue; /* (t) Sleepqueue queue blocked on. */ 224 void *td_wchan; /* (t) Sleep address. */ 225 const char *td_wmesg; /* (t) Reason for sleep. */ 226 u_char td_lastcpu; /* (t) Last cpu we were on. */ 227 u_char td_oncpu; /* (t) Which cpu we are on. */ 228 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */ 229 u_char td_tsqueue; /* (t) Turnstile queue blocked on. */ 230 short td_locks; /* (k) Count of non-spin locks. */ 231 short td_rw_rlocks; /* (k) Count of rwlock read locks. */ 232 short td_lk_slocks; /* (k) Count of lockmgr shared locks. */ 233 struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */ 234 const char *td_lockname; /* (t) Name of lock blocked on. */ 235 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */ 236 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */ 237 int td_intr_nesting_level; /* (k) Interrupt recursion. */ 238 int td_pinned; /* (k) Temporary cpu pin count. */ 239 struct ucred *td_ucred; /* (k) Reference to credentials. */ 240 u_int td_estcpu; /* (t) estimated cpu utilization */ 241 int td_slptick; /* (t) Time at sleep. */ 242 int td_blktick; /* (t) Time spent blocked. */ 243 struct rusage td_ru; /* (t) rusage information. */ 244 struct rusage_ext td_rux; /* (t) Internal rusage information. */ 245 uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */ 246 uint64_t td_runtime; /* (t) How many cpu ticks we've run. */ 247 u_int td_pticks; /* (t) Statclock hits for profiling */ 248 u_int td_sticks; /* (t) Statclock hits in system mode. */ 249 u_int td_iticks; /* (t) Statclock hits in intr mode. */ 250 u_int td_uticks; /* (t) Statclock hits in user mode. */ 251 int td_intrval; /* (t) Return value for sleepq. */ 252 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */ 253 sigset_t td_sigmask; /* (c) Current signal mask. */ 254 volatile u_int td_generation; /* (k) For detection of preemption */ 255 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */ 256 int td_xsig; /* (c) Signal for ptrace */ 257 u_long td_profil_addr; /* (k) Temporary addr until AST. */ 258 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */ 259 char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */ 260 struct file *td_fpop; /* (k) file referencing cdev under op */ 261 int td_dbgflags; /* (c) Userland debugger flags */ 262 int td_ng_outbound; /* (k) Thread entered ng from above. */ 263 struct osd td_osd; /* (k) Object specific data. */ 264 #define td_endzero td_base_pri 265 266 /* Copied during fork1() or thread_sched_upcall(). */ 267 #define td_startcopy td_endzero 268 u_char td_rqindex; /* (t) Run queue index. */ 269 u_char td_base_pri; /* (t) Thread base kernel priority. */ 270 u_char td_priority; /* (t) Thread active priority. */ 271 u_char td_pri_class; /* (t) Scheduling class. */ 272 u_char td_user_pri; /* (t) User pri from estcpu and nice. */ 273 u_char td_base_user_pri; /* (t) Base user pri */ 274 #define td_endcopy td_pcb 275 276 /* 277 * Fields that must be manually set in fork1() or thread_sched_upcall() 278 * or already have been set in the allocator, constructor, etc. 279 */ 280 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */ 281 enum { 282 TDS_INACTIVE = 0x0, 283 TDS_INHIBITED, 284 TDS_CAN_RUN, 285 TDS_RUNQ, 286 TDS_RUNNING 287 } td_state; /* (t) thread state */ 288 register_t td_retval[2]; /* (k) Syscall aux returns. */ 289 struct callout td_slpcallout; /* (h) Callout for sleep. */ 290 struct trapframe *td_frame; /* (k) */ 291 struct vm_object *td_kstack_obj;/* (a) Kstack object. */ 292 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */ 293 int td_kstack_pages; /* (a) Size of the kstack. */ 294 volatile u_int td_critnest; /* (k*) Critical section nest level. */ 295 struct mdthread td_md; /* (k) Any machine-dependent fields. */ 296 struct td_sched *td_sched; /* (*) Scheduler-specific data. */ 297 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */ 298 int td_syscalls; /* per-thread syscall count (used by NFS :)) */ 299 struct lpohead td_lprof[2]; /* (a) lock profiling objects. */ 300 struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */ 301 int td_errno; /* Error returned by last syscall. */ 302 struct vnet *td_vnet; /* (k) Effective vnet. */ 303 const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */ 304 }; 305 306 struct mtx *thread_lock_block(struct thread *); 307 void thread_lock_unblock(struct thread *, struct mtx *); 308 void thread_lock_set(struct thread *, struct mtx *); 309 #define THREAD_LOCK_ASSERT(td, type) \ 310 do { \ 311 struct mtx *__m = (td)->td_lock; \ 312 if (__m != &blocked_lock) \ 313 mtx_assert(__m, (type)); \ 314 } while (0) 315 316 #ifdef INVARIANTS 317 #define THREAD_LOCKPTR_ASSERT(td, lock) \ 318 do { \ 319 struct mtx *__m = (td)->td_lock; \ 320 KASSERT((__m == &blocked_lock || __m == (lock)), \ 321 ("Thread %p lock %p does not match %p", td, __m, (lock))); \ 322 } while (0) 323 #else 324 #define THREAD_LOCKPTR_ASSERT(td, lock) 325 #endif 326 327 /* 328 * Flags kept in td_flags: 329 * To change these you MUST have the scheduler lock. 330 */ 331 #define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */ 332 #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */ 333 #define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */ 334 #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */ 335 #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */ 336 #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */ 337 #define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */ 338 #define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */ 339 #define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */ 340 #define TDF_UBORROWING 0x00000200 /* Thread is borrowing user pri. */ 341 #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */ 342 #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */ 343 #define TDF_TIMOFAIL 0x00001000 /* Timeout from sleep after we were awake. */ 344 #define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */ 345 #define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */ 346 #define TDF_NEEDSUSPCHK 0x00008000 /* Thread may need to suspend. */ 347 #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */ 348 #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */ 349 #define TDF_NOLOAD 0x00040000 /* Ignore during load avg calculations. */ 350 #define TDF_UNUSED19 0x00080000 /* Thread is sleeping on a umtx. */ 351 #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */ 352 #define TDF_UNUSED21 0x00200000 /* --available-- */ 353 #define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */ 354 #define TDF_UNUSED23 0x00800000 /* --available-- */ 355 #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */ 356 #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */ 357 #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */ 358 #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */ 359 #define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */ 360 #define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */ 361 #define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */ 362 363 /* Userland debug flags */ 364 #define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */ 365 #define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */ 366 #define TDB_USERWR 0x00000004 /* Debugger modified memory or registers */ 367 #define TDB_SCE 0x00000008 /* Thread performs syscall enter */ 368 #define TDB_SCX 0x00000010 /* Thread performs syscall exit */ 369 #define TDB_EXEC 0x00000020 /* TDB_SCX from exec(2) family */ 370 371 /* 372 * "Private" flags kept in td_pflags: 373 * These are only written by curthread and thus need no locking. 374 */ 375 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */ 376 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */ 377 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */ 378 #define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */ 379 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */ 380 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */ 381 #define TDP_DEADLKTREAT 0x00000040 /* Lock aquisition - deadlock treatment. */ 382 #define TDP_UNUSED80 0x00000080 /* available. */ 383 #define TDP_NOSLEEPING 0x00000100 /* Thread is not allowed to sleep on a sq. */ 384 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */ 385 #define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */ 386 #define TDP_UNUSED800 0x00000800 /* available. */ 387 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */ 388 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */ 389 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */ 390 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */ 391 #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */ 392 #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */ 393 #define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */ 394 #define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */ 395 #define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */ 396 #define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */ 397 #define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */ 398 #define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */ 399 #define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */ 400 401 /* 402 * Reasons that the current thread can not be run yet. 403 * More than one may apply. 404 */ 405 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */ 406 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */ 407 #define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */ 408 #define TDI_LOCK 0x0008 /* Stopped on a lock. */ 409 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */ 410 411 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING) 412 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL) 413 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED) 414 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED) 415 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK) 416 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT) 417 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING) 418 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ) 419 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN) 420 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED) 421 #define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED) 422 #define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD) 423 424 425 #define TD_SET_INHIB(td, inhib) do { \ 426 (td)->td_state = TDS_INHIBITED; \ 427 (td)->td_inhibitors |= (inhib); \ 428 } while (0) 429 430 #define TD_CLR_INHIB(td, inhib) do { \ 431 if (((td)->td_inhibitors & (inhib)) && \ 432 (((td)->td_inhibitors &= ~(inhib)) == 0)) \ 433 (td)->td_state = TDS_CAN_RUN; \ 434 } while (0) 435 436 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING) 437 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED) 438 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK) 439 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED) 440 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT) 441 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING) 442 443 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING) 444 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED) 445 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK) 446 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED) 447 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT) 448 449 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING 450 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ 451 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN 452 453 /* 454 * Process structure. 455 */ 456 struct proc { 457 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */ 458 TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */ 459 struct mtx p_slock; /* process spin lock */ 460 struct ucred *p_ucred; /* (c) Process owner's identity. */ 461 struct filedesc *p_fd; /* (b) Open files. */ 462 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */ 463 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */ 464 struct plimit *p_limit; /* (c) Process limits. */ 465 struct callout p_limco; /* (c) Limit callout handle */ 466 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */ 467 468 /* 469 * The following don't make too much sense. 470 * See the td_ or ke_ versions of the same flags. 471 */ 472 int p_flag; /* (c) P_* flags. */ 473 enum { 474 PRS_NEW = 0, /* In creation */ 475 PRS_NORMAL, /* threads can be run. */ 476 PRS_ZOMBIE 477 } p_state; /* (j/c) S* process status. */ 478 pid_t p_pid; /* (b) Process identifier. */ 479 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */ 480 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */ 481 struct proc *p_pptr; /* (c + e) Pointer to parent process. */ 482 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */ 483 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */ 484 struct mtx p_mtx; /* (n) Lock for this struct. */ 485 struct ksiginfo *p_ksi; /* Locked by parent proc lock */ 486 sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */ 487 #define p_siglist p_sigqueue.sq_signals 488 489 /* The following fields are all zeroed upon creation in fork. */ 490 #define p_startzero p_oppid 491 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */ 492 struct vmspace *p_vmspace; /* (b) Address space. */ 493 u_int p_swtick; /* (c) Tick when swapped in or out. */ 494 struct itimerval p_realtimer; /* (c) Alarm timer. */ 495 struct rusage p_ru; /* (a) Exit information. */ 496 struct rusage_ext p_rux; /* (cj) Internal resource usage. */ 497 struct rusage_ext p_crux; /* (c) Internal child resource usage. */ 498 int p_profthreads; /* (c) Num threads in addupc_task. */ 499 volatile int p_exitthreads; /* (j) Number of threads exiting */ 500 int p_traceflag; /* (o) Kernel trace points. */ 501 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */ 502 struct ucred *p_tracecred; /* (o) Credentials to trace with. */ 503 struct vnode *p_textvp; /* (b) Vnode of executable. */ 504 u_int p_lock; /* (c) Proclock (prevent swap) count. */ 505 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */ 506 int p_sigparent; /* (c) Signal to parent on exit. */ 507 int p_sig; /* (n) For core dump/debugger XXX. */ 508 u_long p_code; /* (n) For core dump/debugger XXX. */ 509 u_int p_stops; /* (c) Stop event bitmask. */ 510 u_int p_stype; /* (c) Stop event type. */ 511 char p_step; /* (c) Process is stopped. */ 512 u_char p_pfsflags; /* (c) Procfs flags. */ 513 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */ 514 struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */ 515 struct thread *p_singlethread;/* (c + j) If single threading this is it */ 516 int p_suspcount; /* (j) Num threads in suspended mode. */ 517 struct thread *p_xthread; /* (c) Trap thread */ 518 int p_boundary_count;/* (c) Num threads at user boundary */ 519 int p_pendingcnt; /* how many signals are pending */ 520 struct itimers *p_itimers; /* (c) POSIX interval timers. */ 521 /* End area that is zeroed on creation. */ 522 #define p_endzero p_magic 523 524 /* The following fields are all copied upon creation in fork. */ 525 #define p_startcopy p_endzero 526 u_int p_magic; /* (b) Magic number. */ 527 int p_osrel; /* (x) osreldate for the 528 binary (from ELF note, if any) */ 529 char p_comm[MAXCOMLEN + 1]; /* (b) Process name. */ 530 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */ 531 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */ 532 struct pargs *p_args; /* (c) Process arguments. */ 533 rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */ 534 signed char p_nice; /* (c) Process "nice" value. */ 535 int p_fibnum; /* in this routing domain XXX MRT */ 536 /* End area that is copied on creation. */ 537 #define p_endcopy p_xstat 538 539 u_short p_xstat; /* (c) Exit status; also stop sig. */ 540 struct knlist p_klist; /* (c) Knotes attached to this proc. */ 541 int p_numthreads; /* (c) Number of threads. */ 542 struct mdproc p_md; /* Any machine-dependent fields. */ 543 struct callout p_itcallout; /* (h + c) Interval timer callout. */ 544 u_short p_acflag; /* (c) Accounting flags. */ 545 struct proc *p_peers; /* (r) */ 546 struct proc *p_leader; /* (b) */ 547 void *p_emuldata; /* (c) Emulator state data. */ 548 struct label *p_label; /* (*) Proc (not subject) MAC label. */ 549 struct p_sched *p_sched; /* (*) Scheduler-specific data. */ 550 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */ 551 LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/ 552 struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */ 553 struct cv p_pwait; /* (*) wait cv for exit/exec */ 554 }; 555 556 #define p_session p_pgrp->pg_session 557 #define p_pgid p_pgrp->pg_id 558 559 #define NOCPU 0xff /* For when we aren't on a CPU. */ 560 561 #define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock) 562 #define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock) 563 #define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type)) 564 565 /* These flags are kept in p_flag. */ 566 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */ 567 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */ 568 #define P_KTHREAD 0x00004 /* Kernel thread (*). */ 569 #define P_UNUSED0 0x00008 /* available. */ 570 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */ 571 #define P_PROFIL 0x00020 /* Has started profiling. */ 572 #define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */ 573 #define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */ 574 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */ 575 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */ 576 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */ 577 #define P_TRACED 0x00800 /* Debugged process being traced. */ 578 #define P_WAITED 0x01000 /* Someone is waiting for us. */ 579 #define P_WEXIT 0x02000 /* Working on exiting. */ 580 #define P_EXEC 0x04000 /* Process called exec. */ 581 #define P_WKILLED 0x08000 /* Killed, go to kernel/user boundary ASAP. */ 582 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */ 583 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */ 584 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */ 585 #define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */ 586 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */ 587 #define P_SIGEVENT 0x200000 /* Process pending signals changed. */ 588 #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */ 589 #define P_HWPMC 0x800000 /* Process is using HWPMCs */ 590 591 #define P_JAILED 0x1000000 /* Process is in jail. */ 592 #define P_INEXEC 0x4000000 /* Process is in execve(). */ 593 #define P_STATCHILD 0x8000000 /* Child process stopped or exited. */ 594 #define P_INMEM 0x10000000 /* Loaded into memory. */ 595 #define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */ 596 #define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */ 597 598 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE) 599 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED) 600 #define P_KILLED(p) ((p)->p_flag & P_WKILLED) 601 602 /* 603 * These were process status values (p_stat), now they are only used in 604 * legacy conversion code. 605 */ 606 #define SIDL 1 /* Process being created by fork. */ 607 #define SRUN 2 /* Currently runnable. */ 608 #define SSLEEP 3 /* Sleeping on an address. */ 609 #define SSTOP 4 /* Process debugging or suspension. */ 610 #define SZOMB 5 /* Awaiting collection by parent. */ 611 #define SWAIT 6 /* Waiting for interrupt. */ 612 #define SLOCK 7 /* Blocked on a lock. */ 613 614 #define P_MAGIC 0xbeefface 615 616 #ifdef _KERNEL 617 618 /* Types and flags for mi_switch(). */ 619 #define SW_TYPE_MASK 0xff /* First 8 bits are switch type */ 620 #define SWT_NONE 0 /* Unspecified switch. */ 621 #define SWT_PREEMPT 1 /* Switching due to preemption. */ 622 #define SWT_OWEPREEMPT 2 /* Switching due to opepreempt. */ 623 #define SWT_TURNSTILE 3 /* Turnstile contention. */ 624 #define SWT_SLEEPQ 4 /* Sleepq wait. */ 625 #define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */ 626 #define SWT_RELINQUISH 6 /* yield call. */ 627 #define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */ 628 #define SWT_IDLE 8 /* Switching from the idle thread. */ 629 #define SWT_IWAIT 9 /* Waiting for interrupts. */ 630 #define SWT_SUSPEND 10 /* Thread suspended. */ 631 #define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */ 632 #define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */ 633 #define SWT_COUNT 13 /* Number of switch types. */ 634 /* Flags */ 635 #define SW_VOL 0x0100 /* Voluntary switch. */ 636 #define SW_INVOL 0x0200 /* Involuntary switch. */ 637 #define SW_PREEMPT 0x0400 /* The invol switch is a preemption */ 638 639 /* How values for thread_single(). */ 640 #define SINGLE_NO_EXIT 0 641 #define SINGLE_EXIT 1 642 #define SINGLE_BOUNDARY 2 643 644 #ifdef MALLOC_DECLARE 645 MALLOC_DECLARE(M_PARGS); 646 MALLOC_DECLARE(M_PGRP); 647 MALLOC_DECLARE(M_SESSION); 648 MALLOC_DECLARE(M_SUBPROC); 649 MALLOC_DECLARE(M_ZOMBIE); 650 #endif 651 652 #define FOREACH_PROC_IN_SYSTEM(p) \ 653 LIST_FOREACH((p), &allproc, p_list) 654 #define FOREACH_THREAD_IN_PROC(p, td) \ 655 TAILQ_FOREACH((td), &(p)->p_threads, td_plist) 656 657 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads) 658 659 /* 660 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t, 661 * as it is used to represent "no process group". 662 */ 663 #define PID_MAX 99999 664 #define NO_PID 100000 665 666 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p)) 667 668 669 #define STOPEVENT(p, e, v) do { \ 670 if ((p)->p_stops & (e)) { \ 671 PROC_LOCK(p); \ 672 stopevent((p), (e), (v)); \ 673 PROC_UNLOCK(p); \ 674 } \ 675 } while (0) 676 #define _STOPEVENT(p, e, v) do { \ 677 PROC_LOCK_ASSERT(p, MA_OWNED); \ 678 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.lock_object, \ 679 "checking stopevent %d", (e)); \ 680 if ((p)->p_stops & (e)) \ 681 stopevent((p), (e), (v)); \ 682 } while (0) 683 684 /* Lock and unlock a process. */ 685 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx) 686 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx) 687 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx) 688 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx) 689 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type)) 690 691 /* Lock and unlock a process group. */ 692 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx) 693 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx) 694 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx) 695 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type)) 696 697 #define PGRP_LOCK_PGSIGNAL(pg) do { \ 698 if ((pg) != NULL) \ 699 PGRP_LOCK(pg); \ 700 } while (0) 701 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \ 702 if ((pg) != NULL) \ 703 PGRP_UNLOCK(pg); \ 704 } while (0) 705 706 /* Lock and unlock a session. */ 707 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx) 708 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx) 709 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx) 710 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type)) 711 712 /* Hold process U-area in memory, normally for ptrace/procfs work. */ 713 #define PHOLD(p) do { \ 714 PROC_LOCK(p); \ 715 _PHOLD(p); \ 716 PROC_UNLOCK(p); \ 717 } while (0) 718 #define _PHOLD(p) do { \ 719 PROC_LOCK_ASSERT((p), MA_OWNED); \ 720 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \ 721 ("PHOLD of exiting process")); \ 722 (p)->p_lock++; \ 723 if (((p)->p_flag & P_INMEM) == 0) \ 724 faultin((p)); \ 725 } while (0) 726 #define PROC_ASSERT_HELD(p) do { \ 727 KASSERT((p)->p_lock > 0, ("process not held")); \ 728 } while (0) 729 730 #define PRELE(p) do { \ 731 PROC_LOCK((p)); \ 732 _PRELE((p)); \ 733 PROC_UNLOCK((p)); \ 734 } while (0) 735 #define _PRELE(p) do { \ 736 PROC_LOCK_ASSERT((p), MA_OWNED); \ 737 (--(p)->p_lock); \ 738 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \ 739 wakeup(&(p)->p_lock); \ 740 } while (0) 741 #define PROC_ASSERT_NOT_HELD(p) do { \ 742 KASSERT((p)->p_lock == 0, ("process held")); \ 743 } while (0) 744 745 /* Check whether a thread is safe to be swapped out. */ 746 #define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP) 747 748 /* Control whether or not it is safe for curthread to sleep. */ 749 #define THREAD_NO_SLEEPING() do { \ 750 KASSERT(!(curthread->td_pflags & TDP_NOSLEEPING), \ 751 ("nested no sleeping")); \ 752 curthread->td_pflags |= TDP_NOSLEEPING; \ 753 } while (0) 754 755 #define THREAD_SLEEPING_OK() do { \ 756 KASSERT((curthread->td_pflags & TDP_NOSLEEPING), \ 757 ("nested sleeping ok")); \ 758 curthread->td_pflags &= ~TDP_NOSLEEPING; \ 759 } while (0) 760 761 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash]) 762 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl; 763 extern u_long pidhash; 764 765 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash]) 766 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl; 767 extern u_long pgrphash; 768 769 extern struct sx allproc_lock; 770 extern struct sx proctree_lock; 771 extern struct mtx ppeers_lock; 772 extern struct proc proc0; /* Process slot for swapper. */ 773 extern struct thread thread0; /* Primary thread in proc0. */ 774 extern struct vmspace vmspace0; /* VM space for proc0. */ 775 extern int hogticks; /* Limit on kernel cpu hogs. */ 776 extern int lastpid; 777 extern int nprocs, maxproc; /* Current and max number of procs. */ 778 extern int maxprocperuid; /* Max procs per uid. */ 779 extern u_long ps_arg_cache_limit; 780 781 LIST_HEAD(proclist, proc); 782 TAILQ_HEAD(procqueue, proc); 783 TAILQ_HEAD(threadqueue, thread); 784 extern struct proclist allproc; /* List of all processes. */ 785 extern struct proclist zombproc; /* List of zombie processes. */ 786 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */ 787 788 extern struct uma_zone *proc_zone; 789 790 struct proc *pfind(pid_t); /* Find process by id. */ 791 struct pgrp *pgfind(pid_t); /* Find process group by id. */ 792 struct proc *zpfind(pid_t); /* Find zombie process by id. */ 793 794 void ast(struct trapframe *framep); 795 struct thread *choosethread(void); 796 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum); 797 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, 798 struct session *sess); 799 int enterthispgrp(struct proc *p, struct pgrp *pgrp); 800 void faultin(struct proc *p); 801 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering); 802 int fork1(struct thread *, int, int, struct proc **); 803 void fork_exit(void (*)(void *, struct trapframe *), void *, 804 struct trapframe *); 805 void fork_return(struct thread *, struct trapframe *); 806 int inferior(struct proc *p); 807 void kick_proc0(void); 808 int leavepgrp(struct proc *p); 809 int maybe_preempt(struct thread *td); 810 void mi_switch(int flags, struct thread *newtd); 811 int p_candebug(struct thread *td, struct proc *p); 812 int p_cansee(struct thread *td, struct proc *p); 813 int p_cansched(struct thread *td, struct proc *p); 814 int p_cansignal(struct thread *td, struct proc *p, int signum); 815 int p_canwait(struct thread *td, struct proc *p); 816 struct pargs *pargs_alloc(int len); 817 void pargs_drop(struct pargs *pa); 818 void pargs_hold(struct pargs *pa); 819 void procinit(void); 820 void proc_linkup0(struct proc *p, struct thread *td); 821 void proc_linkup(struct proc *p, struct thread *td); 822 void proc_reparent(struct proc *child, struct proc *newparent); 823 struct pstats *pstats_alloc(void); 824 void pstats_fork(struct pstats *src, struct pstats *dst); 825 void pstats_free(struct pstats *ps); 826 int securelevel_ge(struct ucred *cr, int level); 827 int securelevel_gt(struct ucred *cr, int level); 828 void sess_hold(struct session *); 829 void sess_release(struct session *); 830 int setrunnable(struct thread *); 831 void setsugid(struct proc *p); 832 int sigonstack(size_t sp); 833 void sleepinit(void); 834 void stopevent(struct proc *, u_int, u_int); 835 void threadinit(void); 836 void cpu_idle(int); 837 int cpu_idle_wakeup(int); 838 extern void (*cpu_idle_hook)(void); /* Hook to machdep CPU idler. */ 839 void cpu_switch(struct thread *, struct thread *, struct mtx *); 840 void cpu_throw(struct thread *, struct thread *) __dead2; 841 void unsleep(struct thread *); 842 void userret(struct thread *, struct trapframe *); 843 struct syscall_args; 844 int syscallenter(struct thread *, struct syscall_args *); 845 void syscallret(struct thread *, int, struct syscall_args *); 846 847 void cpu_exit(struct thread *); 848 void exit1(struct thread *, int) __dead2; 849 struct syscall_args; 850 int cpu_fetch_syscall_args(struct thread *td, struct syscall_args *sa); 851 void cpu_fork(struct thread *, struct proc *, struct thread *, int); 852 void cpu_set_fork_handler(struct thread *, void (*)(void *), void *); 853 void cpu_set_syscall_retval(struct thread *, int); 854 void cpu_set_upcall(struct thread *td, struct thread *td0); 855 void cpu_set_upcall_kse(struct thread *, void (*)(void *), void *, 856 stack_t *); 857 int cpu_set_user_tls(struct thread *, void *tls_base); 858 void cpu_thread_alloc(struct thread *); 859 void cpu_thread_clean(struct thread *); 860 void cpu_thread_exit(struct thread *); 861 void cpu_thread_free(struct thread *); 862 void cpu_thread_swapin(struct thread *); 863 void cpu_thread_swapout(struct thread *); 864 struct thread *thread_alloc(int pages); 865 int thread_alloc_stack(struct thread *, int pages); 866 void thread_exit(void) __dead2; 867 void thread_free(struct thread *td); 868 void thread_link(struct thread *td, struct proc *p); 869 void thread_reap(void); 870 int thread_single(int how); 871 void thread_single_end(void); 872 void thread_stash(struct thread *td); 873 void thread_stopped(struct proc *p); 874 void childproc_stopped(struct proc *child, int reason); 875 void childproc_continued(struct proc *child); 876 void childproc_exited(struct proc *child); 877 int thread_suspend_check(int how); 878 void thread_suspend_switch(struct thread *); 879 void thread_suspend_one(struct thread *td); 880 void thread_unlink(struct thread *td); 881 void thread_unsuspend(struct proc *p); 882 int thread_unsuspend_one(struct thread *td); 883 void thread_unthread(struct thread *td); 884 void thread_wait(struct proc *p); 885 struct thread *thread_find(struct proc *p, lwpid_t tid); 886 void thr_exit1(void); 887 888 #endif /* _KERNEL */ 889 890 #endif /* !_SYS_PROC_H_ */ 891