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 LIST_ENTRY(thread) td_hash; /* (d) Hash chain. */ 209 struct cpuset *td_cpuset; /* (t) CPU affinity mask. */ 210 struct seltd *td_sel; /* Select queue/channel. */ 211 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */ 212 struct turnstile *td_turnstile; /* (k) Associated turnstile. */ 213 struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */ 214 lwpid_t td_tid; /* (b) Thread ID. */ 215 sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */ 216 #define td_siglist td_sigqueue.sq_signals 217 u_char td_lend_user_pri; /* (t) Lend user pri. */ 218 219 /* Cleared during fork1() */ 220 #define td_startzero td_flags 221 int td_flags; /* (t) TDF_* flags. */ 222 int td_inhibitors; /* (t) Why can not run. */ 223 int td_pflags; /* (k) Private thread (TDP_*) flags. */ 224 int td_dupfd; /* (k) Ret value from fdopen. XXX */ 225 int td_sqqueue; /* (t) Sleepqueue queue blocked on. */ 226 void *td_wchan; /* (t) Sleep address. */ 227 const char *td_wmesg; /* (t) Reason for sleep. */ 228 u_char td_lastcpu; /* (t) Last cpu we were on. */ 229 u_char td_oncpu; /* (t) Which cpu we are on. */ 230 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */ 231 u_char td_tsqueue; /* (t) Turnstile queue blocked on. */ 232 short td_locks; /* (k) Count of non-spin locks. */ 233 short td_rw_rlocks; /* (k) Count of rwlock read locks. */ 234 short td_lk_slocks; /* (k) Count of lockmgr shared locks. */ 235 struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */ 236 const char *td_lockname; /* (t) Name of lock blocked on. */ 237 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */ 238 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */ 239 int td_intr_nesting_level; /* (k) Interrupt recursion. */ 240 int td_pinned; /* (k) Temporary cpu pin count. */ 241 struct ucred *td_ucred; /* (k) Reference to credentials. */ 242 u_int td_estcpu; /* (t) estimated cpu utilization */ 243 int td_slptick; /* (t) Time at sleep. */ 244 int td_blktick; /* (t) Time spent blocked. */ 245 int td_swvoltick; /* (t) Time at last SW_VOL switch. */ 246 struct rusage td_ru; /* (t) rusage information. */ 247 struct rusage_ext td_rux; /* (t) Internal rusage information. */ 248 uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */ 249 uint64_t td_runtime; /* (t) How many cpu ticks we've run. */ 250 u_int td_pticks; /* (t) Statclock hits for profiling */ 251 u_int td_sticks; /* (t) Statclock hits in system mode. */ 252 u_int td_iticks; /* (t) Statclock hits in intr mode. */ 253 u_int td_uticks; /* (t) Statclock hits in user mode. */ 254 int td_intrval; /* (t) Return value for sleepq. */ 255 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */ 256 sigset_t td_sigmask; /* (c) Current signal mask. */ 257 volatile u_int td_generation; /* (k) For detection of preemption */ 258 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */ 259 int td_xsig; /* (c) Signal for ptrace */ 260 u_long td_profil_addr; /* (k) Temporary addr until AST. */ 261 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */ 262 char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */ 263 struct file *td_fpop; /* (k) file referencing cdev under op */ 264 int td_dbgflags; /* (c) Userland debugger flags */ 265 struct ksiginfo td_dbgksi; /* (c) ksi reflected to debugger. */ 266 int td_ng_outbound; /* (k) Thread entered ng from above. */ 267 struct osd td_osd; /* (k) Object specific data. */ 268 struct vm_map_entry *td_map_def_user; /* (k) Deferred entries. */ 269 pid_t td_dbg_forked; /* (c) Child pid for debugger. */ 270 #define td_endzero td_rqindex 271 272 /* Copied during fork1() or thread_sched_upcall(). */ 273 #define td_startcopy td_endzero 274 u_char td_rqindex; /* (t) Run queue index. */ 275 u_char td_base_pri; /* (t) Thread base kernel priority. */ 276 u_char td_priority; /* (t) Thread active priority. */ 277 u_char td_pri_class; /* (t) Scheduling class. */ 278 u_char td_user_pri; /* (t) User pri from estcpu and nice. */ 279 u_char td_base_user_pri; /* (t) Base user pri */ 280 #define td_endcopy td_pcb 281 282 /* 283 * Fields that must be manually set in fork1() or thread_sched_upcall() 284 * or already have been set in the allocator, constructor, etc. 285 */ 286 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */ 287 enum { 288 TDS_INACTIVE = 0x0, 289 TDS_INHIBITED, 290 TDS_CAN_RUN, 291 TDS_RUNQ, 292 TDS_RUNNING 293 } td_state; /* (t) thread state */ 294 register_t td_retval[2]; /* (k) Syscall aux returns. */ 295 struct callout td_slpcallout; /* (h) Callout for sleep. */ 296 struct trapframe *td_frame; /* (k) */ 297 struct vm_object *td_kstack_obj;/* (a) Kstack object. */ 298 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */ 299 int td_kstack_pages; /* (a) Size of the kstack. */ 300 volatile u_int td_critnest; /* (k*) Critical section nest level. */ 301 struct mdthread td_md; /* (k) Any machine-dependent fields. */ 302 struct td_sched *td_sched; /* (*) Scheduler-specific data. */ 303 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */ 304 struct lpohead td_lprof[2]; /* (a) lock profiling objects. */ 305 struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */ 306 int td_errno; /* Error returned by last syscall. */ 307 struct vnet *td_vnet; /* (k) Effective vnet. */ 308 const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */ 309 struct trapframe *td_intr_frame;/* (k) Frame of the current irq */ 310 }; 311 312 struct mtx *thread_lock_block(struct thread *); 313 void thread_lock_unblock(struct thread *, struct mtx *); 314 void thread_lock_set(struct thread *, struct mtx *); 315 #define THREAD_LOCK_ASSERT(td, type) \ 316 do { \ 317 struct mtx *__m = (td)->td_lock; \ 318 if (__m != &blocked_lock) \ 319 mtx_assert(__m, (type)); \ 320 } while (0) 321 322 #ifdef INVARIANTS 323 #define THREAD_LOCKPTR_ASSERT(td, lock) \ 324 do { \ 325 struct mtx *__m = (td)->td_lock; \ 326 KASSERT((__m == &blocked_lock || __m == (lock)), \ 327 ("Thread %p lock %p does not match %p", td, __m, (lock))); \ 328 } while (0) 329 #else 330 #define THREAD_LOCKPTR_ASSERT(td, lock) 331 #endif 332 333 #define CRITICAL_ASSERT(td) \ 334 KASSERT((td)->td_critnest >= 1, ("Not in critical section")); 335 336 /* 337 * Flags kept in td_flags: 338 * To change these you MUST have the scheduler lock. 339 */ 340 #define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */ 341 #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */ 342 #define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */ 343 #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */ 344 #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */ 345 #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */ 346 #define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */ 347 #define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */ 348 #define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */ 349 #define TDF_UNUSED09 0x00000200 /* --available-- */ 350 #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */ 351 #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */ 352 #define TDF_TIMOFAIL 0x00001000 /* Timeout from sleep after we were awake. */ 353 #define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */ 354 #define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */ 355 #define TDF_NEEDSUSPCHK 0x00008000 /* Thread may need to suspend. */ 356 #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */ 357 #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */ 358 #define TDF_NOLOAD 0x00040000 /* Ignore during load avg calculations. */ 359 #define TDF_UNUSED19 0x00080000 /* --available-- */ 360 #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */ 361 #define TDF_UNUSED21 0x00200000 /* --available-- */ 362 #define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */ 363 #define TDF_UNUSED23 0x00800000 /* --available-- */ 364 #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */ 365 #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */ 366 #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */ 367 #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */ 368 #define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */ 369 #define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */ 370 #define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */ 371 372 /* Userland debug flags */ 373 #define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */ 374 #define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */ 375 #define TDB_USERWR 0x00000004 /* Debugger modified memory or registers */ 376 #define TDB_SCE 0x00000008 /* Thread performs syscall enter */ 377 #define TDB_SCX 0x00000010 /* Thread performs syscall exit */ 378 #define TDB_EXEC 0x00000020 /* TDB_SCX from exec(2) family */ 379 #define TDB_FORK 0x00000040 /* TDB_SCX from fork(2) that created new 380 process */ 381 #define TDB_STOPATFORK 0x00000080 /* Stop at the return from fork (child 382 only) */ 383 384 /* 385 * "Private" flags kept in td_pflags: 386 * These are only written by curthread and thus need no locking. 387 */ 388 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */ 389 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */ 390 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */ 391 #define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */ 392 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */ 393 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */ 394 #define TDP_DEADLKTREAT 0x00000040 /* Lock aquisition - deadlock treatment. */ 395 #define TDP_UNUSED80 0x00000080 /* available. */ 396 #define TDP_NOSLEEPING 0x00000100 /* Thread is not allowed to sleep on a sq. */ 397 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */ 398 #define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */ 399 #define TDP_UNUSED800 0x00000800 /* available. */ 400 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */ 401 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */ 402 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */ 403 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */ 404 #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */ 405 #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */ 406 #define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */ 407 #define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */ 408 #define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */ 409 #define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */ 410 #define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */ 411 #define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */ 412 #define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */ 413 414 /* 415 * Reasons that the current thread can not be run yet. 416 * More than one may apply. 417 */ 418 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */ 419 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */ 420 #define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */ 421 #define TDI_LOCK 0x0008 /* Stopped on a lock. */ 422 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */ 423 424 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING) 425 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL) 426 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED) 427 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED) 428 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK) 429 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT) 430 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING) 431 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ) 432 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN) 433 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED) 434 #define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED) 435 #define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD) 436 437 438 #define TD_SET_INHIB(td, inhib) do { \ 439 (td)->td_state = TDS_INHIBITED; \ 440 (td)->td_inhibitors |= (inhib); \ 441 } while (0) 442 443 #define TD_CLR_INHIB(td, inhib) do { \ 444 if (((td)->td_inhibitors & (inhib)) && \ 445 (((td)->td_inhibitors &= ~(inhib)) == 0)) \ 446 (td)->td_state = TDS_CAN_RUN; \ 447 } while (0) 448 449 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING) 450 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED) 451 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK) 452 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED) 453 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT) 454 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING) 455 456 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING) 457 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED) 458 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK) 459 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED) 460 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT) 461 462 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING 463 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ 464 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN 465 466 /* 467 * Process structure. 468 */ 469 struct proc { 470 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */ 471 TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */ 472 struct mtx p_slock; /* process spin lock */ 473 struct ucred *p_ucred; /* (c) Process owner's identity. */ 474 struct filedesc *p_fd; /* (b) Open files. */ 475 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */ 476 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */ 477 struct plimit *p_limit; /* (c) Process limits. */ 478 struct callout p_limco; /* (c) Limit callout handle */ 479 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */ 480 481 /* 482 * The following don't make too much sense. 483 * See the td_ or ke_ versions of the same flags. 484 */ 485 int p_flag; /* (c) P_* flags. */ 486 enum { 487 PRS_NEW = 0, /* In creation */ 488 PRS_NORMAL, /* threads can be run. */ 489 PRS_ZOMBIE 490 } p_state; /* (j/c) S* process status. */ 491 pid_t p_pid; /* (b) Process identifier. */ 492 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */ 493 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */ 494 struct proc *p_pptr; /* (c + e) Pointer to parent process. */ 495 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */ 496 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */ 497 struct mtx p_mtx; /* (n) Lock for this struct. */ 498 struct ksiginfo *p_ksi; /* Locked by parent proc lock */ 499 sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */ 500 #define p_siglist p_sigqueue.sq_signals 501 502 /* The following fields are all zeroed upon creation in fork. */ 503 #define p_startzero p_oppid 504 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */ 505 struct vmspace *p_vmspace; /* (b) Address space. */ 506 u_int p_swtick; /* (c) Tick when swapped in or out. */ 507 struct itimerval p_realtimer; /* (c) Alarm timer. */ 508 struct rusage p_ru; /* (a) Exit information. */ 509 struct rusage_ext p_rux; /* (cj) Internal resource usage. */ 510 struct rusage_ext p_crux; /* (c) Internal child resource usage. */ 511 int p_profthreads; /* (c) Num threads in addupc_task. */ 512 volatile int p_exitthreads; /* (j) Number of threads exiting */ 513 int p_traceflag; /* (o) Kernel trace points. */ 514 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */ 515 struct ucred *p_tracecred; /* (o) Credentials to trace with. */ 516 struct vnode *p_textvp; /* (b) Vnode of executable. */ 517 u_int p_lock; /* (c) Proclock (prevent swap) count. */ 518 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */ 519 int p_sigparent; /* (c) Signal to parent on exit. */ 520 int p_sig; /* (n) For core dump/debugger XXX. */ 521 u_long p_code; /* (n) For core dump/debugger XXX. */ 522 u_int p_stops; /* (c) Stop event bitmask. */ 523 u_int p_stype; /* (c) Stop event type. */ 524 char p_step; /* (c) Process is stopped. */ 525 u_char p_pfsflags; /* (c) Procfs flags. */ 526 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */ 527 struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */ 528 struct thread *p_singlethread;/* (c + j) If single threading this is it */ 529 int p_suspcount; /* (j) Num threads in suspended mode. */ 530 struct thread *p_xthread; /* (c) Trap thread */ 531 int p_boundary_count;/* (c) Num threads at user boundary */ 532 int p_pendingcnt; /* how many signals are pending */ 533 struct itimers *p_itimers; /* (c) POSIX interval timers. */ 534 /* End area that is zeroed on creation. */ 535 #define p_endzero p_magic 536 537 /* The following fields are all copied upon creation in fork. */ 538 #define p_startcopy p_endzero 539 u_int p_magic; /* (b) Magic number. */ 540 int p_osrel; /* (x) osreldate for the 541 binary (from ELF note, if any) */ 542 char p_comm[MAXCOMLEN + 1]; /* (b) Process name. */ 543 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */ 544 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */ 545 struct pargs *p_args; /* (c) Process arguments. */ 546 rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */ 547 signed char p_nice; /* (c) Process "nice" value. */ 548 int p_fibnum; /* in this routing domain XXX MRT */ 549 /* End area that is copied on creation. */ 550 #define p_endcopy p_xstat 551 552 u_short p_xstat; /* (c) Exit status; also stop sig. */ 553 struct knlist p_klist; /* (c) Knotes attached to this proc. */ 554 int p_numthreads; /* (c) Number of threads. */ 555 struct mdproc p_md; /* Any machine-dependent fields. */ 556 struct callout p_itcallout; /* (h + c) Interval timer callout. */ 557 u_short p_acflag; /* (c) Accounting flags. */ 558 struct proc *p_peers; /* (r) */ 559 struct proc *p_leader; /* (b) */ 560 void *p_emuldata; /* (c) Emulator state data. */ 561 struct label *p_label; /* (*) Proc (not subject) MAC label. */ 562 struct p_sched *p_sched; /* (*) Scheduler-specific data. */ 563 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */ 564 LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/ 565 struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */ 566 struct cv p_pwait; /* (*) wait cv for exit/exec. */ 567 struct cv p_dbgwait; /* (*) wait cv for debugger attach 568 after fork. */ 569 }; 570 571 #define p_session p_pgrp->pg_session 572 #define p_pgid p_pgrp->pg_id 573 574 #define NOCPU 0xff /* For when we aren't on a CPU. */ 575 576 #define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock) 577 #define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock) 578 #define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type)) 579 580 /* These flags are kept in p_flag. */ 581 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */ 582 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */ 583 #define P_KTHREAD 0x00004 /* Kernel thread (*). */ 584 #define P_FOLLOWFORK 0x00008 /* Attach parent debugger to children. */ 585 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */ 586 #define P_PROFIL 0x00020 /* Has started profiling. */ 587 #define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */ 588 #define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */ 589 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */ 590 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */ 591 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */ 592 #define P_TRACED 0x00800 /* Debugged process being traced. */ 593 #define P_WAITED 0x01000 /* Someone is waiting for us. */ 594 #define P_WEXIT 0x02000 /* Working on exiting. */ 595 #define P_EXEC 0x04000 /* Process called exec. */ 596 #define P_WKILLED 0x08000 /* Killed, go to kernel/user boundary ASAP. */ 597 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */ 598 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */ 599 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */ 600 #define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */ 601 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */ 602 #define P_SIGEVENT 0x200000 /* Process pending signals changed. */ 603 #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */ 604 #define P_HWPMC 0x800000 /* Process is using HWPMCs */ 605 606 #define P_JAILED 0x1000000 /* Process is in jail. */ 607 #define P_INEXEC 0x4000000 /* Process is in execve(). */ 608 #define P_STATCHILD 0x8000000 /* Child process stopped or exited. */ 609 #define P_INMEM 0x10000000 /* Loaded into memory. */ 610 #define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */ 611 #define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */ 612 613 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE) 614 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED) 615 #define P_KILLED(p) ((p)->p_flag & P_WKILLED) 616 617 /* 618 * These were process status values (p_stat), now they are only used in 619 * legacy conversion code. 620 */ 621 #define SIDL 1 /* Process being created by fork. */ 622 #define SRUN 2 /* Currently runnable. */ 623 #define SSLEEP 3 /* Sleeping on an address. */ 624 #define SSTOP 4 /* Process debugging or suspension. */ 625 #define SZOMB 5 /* Awaiting collection by parent. */ 626 #define SWAIT 6 /* Waiting for interrupt. */ 627 #define SLOCK 7 /* Blocked on a lock. */ 628 629 #define P_MAGIC 0xbeefface 630 631 #ifdef _KERNEL 632 633 /* Types and flags for mi_switch(). */ 634 #define SW_TYPE_MASK 0xff /* First 8 bits are switch type */ 635 #define SWT_NONE 0 /* Unspecified switch. */ 636 #define SWT_PREEMPT 1 /* Switching due to preemption. */ 637 #define SWT_OWEPREEMPT 2 /* Switching due to opepreempt. */ 638 #define SWT_TURNSTILE 3 /* Turnstile contention. */ 639 #define SWT_SLEEPQ 4 /* Sleepq wait. */ 640 #define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */ 641 #define SWT_RELINQUISH 6 /* yield call. */ 642 #define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */ 643 #define SWT_IDLE 8 /* Switching from the idle thread. */ 644 #define SWT_IWAIT 9 /* Waiting for interrupts. */ 645 #define SWT_SUSPEND 10 /* Thread suspended. */ 646 #define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */ 647 #define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */ 648 #define SWT_COUNT 13 /* Number of switch types. */ 649 /* Flags */ 650 #define SW_VOL 0x0100 /* Voluntary switch. */ 651 #define SW_INVOL 0x0200 /* Involuntary switch. */ 652 #define SW_PREEMPT 0x0400 /* The invol switch is a preemption */ 653 654 /* How values for thread_single(). */ 655 #define SINGLE_NO_EXIT 0 656 #define SINGLE_EXIT 1 657 #define SINGLE_BOUNDARY 2 658 659 #ifdef MALLOC_DECLARE 660 MALLOC_DECLARE(M_PARGS); 661 MALLOC_DECLARE(M_PGRP); 662 MALLOC_DECLARE(M_SESSION); 663 MALLOC_DECLARE(M_SUBPROC); 664 MALLOC_DECLARE(M_ZOMBIE); 665 #endif 666 667 #define FOREACH_PROC_IN_SYSTEM(p) \ 668 LIST_FOREACH((p), &allproc, p_list) 669 #define FOREACH_THREAD_IN_PROC(p, td) \ 670 TAILQ_FOREACH((td), &(p)->p_threads, td_plist) 671 672 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads) 673 674 /* 675 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t, 676 * as it is used to represent "no process group". 677 */ 678 #define PID_MAX 99999 679 #define NO_PID 100000 680 681 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p)) 682 683 684 #define STOPEVENT(p, e, v) do { \ 685 if ((p)->p_stops & (e)) { \ 686 PROC_LOCK(p); \ 687 stopevent((p), (e), (v)); \ 688 PROC_UNLOCK(p); \ 689 } \ 690 } while (0) 691 #define _STOPEVENT(p, e, v) do { \ 692 PROC_LOCK_ASSERT(p, MA_OWNED); \ 693 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.lock_object, \ 694 "checking stopevent %d", (e)); \ 695 if ((p)->p_stops & (e)) \ 696 stopevent((p), (e), (v)); \ 697 } while (0) 698 699 /* Lock and unlock a process. */ 700 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx) 701 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx) 702 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx) 703 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx) 704 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type)) 705 706 /* Lock and unlock a process group. */ 707 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx) 708 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx) 709 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx) 710 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type)) 711 712 #define PGRP_LOCK_PGSIGNAL(pg) do { \ 713 if ((pg) != NULL) \ 714 PGRP_LOCK(pg); \ 715 } while (0) 716 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \ 717 if ((pg) != NULL) \ 718 PGRP_UNLOCK(pg); \ 719 } while (0) 720 721 /* Lock and unlock a session. */ 722 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx) 723 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx) 724 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx) 725 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type)) 726 727 /* Hold process U-area in memory, normally for ptrace/procfs work. */ 728 #define PHOLD(p) do { \ 729 PROC_LOCK(p); \ 730 _PHOLD(p); \ 731 PROC_UNLOCK(p); \ 732 } while (0) 733 #define _PHOLD(p) do { \ 734 PROC_LOCK_ASSERT((p), MA_OWNED); \ 735 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \ 736 ("PHOLD of exiting process")); \ 737 (p)->p_lock++; \ 738 if (((p)->p_flag & P_INMEM) == 0) \ 739 faultin((p)); \ 740 } while (0) 741 #define PROC_ASSERT_HELD(p) do { \ 742 KASSERT((p)->p_lock > 0, ("process not held")); \ 743 } while (0) 744 745 #define PRELE(p) do { \ 746 PROC_LOCK((p)); \ 747 _PRELE((p)); \ 748 PROC_UNLOCK((p)); \ 749 } while (0) 750 #define _PRELE(p) do { \ 751 PROC_LOCK_ASSERT((p), MA_OWNED); \ 752 (--(p)->p_lock); \ 753 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \ 754 wakeup(&(p)->p_lock); \ 755 } while (0) 756 #define PROC_ASSERT_NOT_HELD(p) do { \ 757 KASSERT((p)->p_lock == 0, ("process held")); \ 758 } while (0) 759 760 /* Check whether a thread is safe to be swapped out. */ 761 #define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP) 762 763 /* Control whether or not it is safe for curthread to sleep. */ 764 #define THREAD_NO_SLEEPING() do { \ 765 KASSERT(!(curthread->td_pflags & TDP_NOSLEEPING), \ 766 ("nested no sleeping")); \ 767 curthread->td_pflags |= TDP_NOSLEEPING; \ 768 } while (0) 769 770 #define THREAD_SLEEPING_OK() do { \ 771 KASSERT((curthread->td_pflags & TDP_NOSLEEPING), \ 772 ("nested sleeping ok")); \ 773 curthread->td_pflags &= ~TDP_NOSLEEPING; \ 774 } while (0) 775 776 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash]) 777 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl; 778 extern u_long pidhash; 779 #define TIDHASH(tid) (&tidhashtbl[(tid) & tidhash]) 780 extern LIST_HEAD(tidhashhead, thread) *tidhashtbl; 781 extern u_long tidhash; 782 extern struct rwlock tidhash_lock; 783 784 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash]) 785 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl; 786 extern u_long pgrphash; 787 788 extern struct sx allproc_lock; 789 extern struct sx proctree_lock; 790 extern struct mtx ppeers_lock; 791 extern struct proc proc0; /* Process slot for swapper. */ 792 extern struct thread thread0; /* Primary thread in proc0. */ 793 extern struct vmspace vmspace0; /* VM space for proc0. */ 794 extern int hogticks; /* Limit on kernel cpu hogs. */ 795 extern int lastpid; 796 extern int nprocs, maxproc; /* Current and max number of procs. */ 797 extern int maxprocperuid; /* Max procs per uid. */ 798 extern u_long ps_arg_cache_limit; 799 800 LIST_HEAD(proclist, proc); 801 TAILQ_HEAD(procqueue, proc); 802 TAILQ_HEAD(threadqueue, thread); 803 extern struct proclist allproc; /* List of all processes. */ 804 extern struct proclist zombproc; /* List of zombie processes. */ 805 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */ 806 807 extern struct uma_zone *proc_zone; 808 809 struct proc *pfind(pid_t); /* Find process by id. */ 810 struct pgrp *pgfind(pid_t); /* Find process group by id. */ 811 struct proc *zpfind(pid_t); /* Find zombie process by id. */ 812 813 void ast(struct trapframe *framep); 814 struct thread *choosethread(void); 815 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum); 816 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, 817 struct session *sess); 818 int enterthispgrp(struct proc *p, struct pgrp *pgrp); 819 void faultin(struct proc *p); 820 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering); 821 int fork1(struct thread *, int, int, struct proc **); 822 void fork_exit(void (*)(void *, struct trapframe *), void *, 823 struct trapframe *); 824 void fork_return(struct thread *, struct trapframe *); 825 int inferior(struct proc *p); 826 void kern_yield(int); 827 void kick_proc0(void); 828 int leavepgrp(struct proc *p); 829 int maybe_preempt(struct thread *td); 830 void maybe_yield(void); 831 void mi_switch(int flags, struct thread *newtd); 832 int p_candebug(struct thread *td, struct proc *p); 833 int p_cansee(struct thread *td, struct proc *p); 834 int p_cansched(struct thread *td, struct proc *p); 835 int p_cansignal(struct thread *td, struct proc *p, int signum); 836 int p_canwait(struct thread *td, struct proc *p); 837 struct pargs *pargs_alloc(int len); 838 void pargs_drop(struct pargs *pa); 839 void pargs_hold(struct pargs *pa); 840 void procinit(void); 841 void proc_linkup0(struct proc *p, struct thread *td); 842 void proc_linkup(struct proc *p, struct thread *td); 843 void proc_reparent(struct proc *child, struct proc *newparent); 844 struct pstats *pstats_alloc(void); 845 void pstats_fork(struct pstats *src, struct pstats *dst); 846 void pstats_free(struct pstats *ps); 847 int securelevel_ge(struct ucred *cr, int level); 848 int securelevel_gt(struct ucred *cr, int level); 849 void sess_hold(struct session *); 850 void sess_release(struct session *); 851 int setrunnable(struct thread *); 852 void setsugid(struct proc *p); 853 int should_yield(void); 854 int sigonstack(size_t sp); 855 void sleepinit(void); 856 void stopevent(struct proc *, u_int, u_int); 857 struct thread *tdfind(lwpid_t, pid_t); 858 void threadinit(void); 859 void tidhash_add(struct thread *); 860 void tidhash_remove(struct thread *); 861 void cpu_idle(int); 862 int cpu_idle_wakeup(int); 863 extern void (*cpu_idle_hook)(void); /* Hook to machdep CPU idler. */ 864 void cpu_switch(struct thread *, struct thread *, struct mtx *); 865 void cpu_throw(struct thread *, struct thread *) __dead2; 866 void unsleep(struct thread *); 867 void userret(struct thread *, struct trapframe *); 868 struct syscall_args; 869 int syscallenter(struct thread *, struct syscall_args *); 870 void syscallret(struct thread *, int, struct syscall_args *); 871 872 void cpu_exit(struct thread *); 873 void exit1(struct thread *, int) __dead2; 874 struct syscall_args; 875 int cpu_fetch_syscall_args(struct thread *td, struct syscall_args *sa); 876 void cpu_fork(struct thread *, struct proc *, struct thread *, int); 877 void cpu_set_fork_handler(struct thread *, void (*)(void *), void *); 878 void cpu_set_syscall_retval(struct thread *, int); 879 void cpu_set_upcall(struct thread *td, struct thread *td0); 880 void cpu_set_upcall_kse(struct thread *, void (*)(void *), void *, 881 stack_t *); 882 int cpu_set_user_tls(struct thread *, void *tls_base); 883 void cpu_thread_alloc(struct thread *); 884 void cpu_thread_clean(struct thread *); 885 void cpu_thread_exit(struct thread *); 886 void cpu_thread_free(struct thread *); 887 void cpu_thread_swapin(struct thread *); 888 void cpu_thread_swapout(struct thread *); 889 struct thread *thread_alloc(int pages); 890 int thread_alloc_stack(struct thread *, int pages); 891 void thread_exit(void) __dead2; 892 void thread_free(struct thread *td); 893 void thread_link(struct thread *td, struct proc *p); 894 void thread_reap(void); 895 int thread_single(int how); 896 void thread_single_end(void); 897 void thread_stash(struct thread *td); 898 void thread_stopped(struct proc *p); 899 void childproc_stopped(struct proc *child, int reason); 900 void childproc_continued(struct proc *child); 901 void childproc_exited(struct proc *child); 902 int thread_suspend_check(int how); 903 void thread_suspend_switch(struct thread *); 904 void thread_suspend_one(struct thread *td); 905 void thread_unlink(struct thread *td); 906 void thread_unsuspend(struct proc *p); 907 int thread_unsuspend_one(struct thread *td); 908 void thread_unthread(struct thread *td); 909 void thread_wait(struct proc *p); 910 struct thread *thread_find(struct proc *p, lwpid_t tid); 911 912 #endif /* _KERNEL */ 913 914 #endif /* !_SYS_PROC_H_ */ 915