Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/sys/proc.h
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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: releng/10.1/sys/sys/proc.h 271372 2014-09-10 09:47:16Z kib $ 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 kaioinfo; 162 struct kaudit_record; 163 struct kdtrace_proc; 164 struct kdtrace_thread; 165 struct mqueue_notifier; 166 struct nlminfo; 167 struct p_sched; 168 struct proc; 169 struct procdesc; 170 struct racct; 171 struct sbuf; 172 struct sleepqueue; 173 struct td_sched; 174 struct thread; 175 struct trapframe; 176 struct turnstile; 177 178 /* 179 * XXX: Does this belong in resource.h or resourcevar.h instead? 180 * Resource usage extension. The times in rusage structs in the kernel are 181 * never up to date. The actual times are kept as runtimes and tick counts 182 * (with control info in the "previous" times), and are converted when 183 * userland asks for rusage info. Backwards compatibility prevents putting 184 * this directly in the user-visible rusage struct. 185 * 186 * Locking for p_rux: (cj) means (j) for p_rux and (c) for p_crux. 187 * Locking for td_rux: (t) for all fields. 188 */ 189 struct rusage_ext { 190 uint64_t rux_runtime; /* (cj) Real time. */ 191 uint64_t rux_uticks; /* (cj) Statclock hits in user mode. */ 192 uint64_t rux_sticks; /* (cj) Statclock hits in sys mode. */ 193 uint64_t rux_iticks; /* (cj) Statclock hits in intr mode. */ 194 uint64_t rux_uu; /* (c) Previous user time in usec. */ 195 uint64_t rux_su; /* (c) Previous sys time in usec. */ 196 uint64_t rux_tu; /* (c) Previous total time in usec. */ 197 }; 198 199 /* 200 * Kernel runnable context (thread). 201 * This is what is put to sleep and reactivated. 202 * Thread context. Processes may have multiple threads. 203 */ 204 struct thread { 205 struct mtx *volatile td_lock; /* replaces sched lock */ 206 struct proc *td_proc; /* (*) Associated process. */ 207 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */ 208 TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */ 209 TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */ 210 TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */ 211 LIST_ENTRY(thread) td_hash; /* (d) Hash chain. */ 212 struct cpuset *td_cpuset; /* (t) CPU affinity mask. */ 213 struct seltd *td_sel; /* Select queue/channel. */ 214 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */ 215 struct turnstile *td_turnstile; /* (k) Associated turnstile. */ 216 struct rl_q_entry *td_rlqe; /* (k) Associated range lock entry. */ 217 struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */ 218 lwpid_t td_tid; /* (b) Thread ID. */ 219 sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */ 220 #define td_siglist td_sigqueue.sq_signals 221 u_char td_lend_user_pri; /* (t) Lend user pri. */ 222 223 /* Cleared during fork1() */ 224 #define td_startzero td_flags 225 int td_flags; /* (t) TDF_* flags. */ 226 int td_inhibitors; /* (t) Why can not run. */ 227 int td_pflags; /* (k) Private thread (TDP_*) flags. */ 228 int td_dupfd; /* (k) Ret value from fdopen. XXX */ 229 int td_sqqueue; /* (t) Sleepqueue queue blocked on. */ 230 void *td_wchan; /* (t) Sleep address. */ 231 const char *td_wmesg; /* (t) Reason for sleep. */ 232 u_char td_lastcpu; /* (t) Last cpu we were on. */ 233 u_char td_oncpu; /* (t) Which cpu we are on. */ 234 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */ 235 u_char td_tsqueue; /* (t) Turnstile queue blocked on. */ 236 short td_locks; /* (k) Count of non-spin locks. */ 237 short td_rw_rlocks; /* (k) Count of rwlock read locks. */ 238 short td_lk_slocks; /* (k) Count of lockmgr shared locks. */ 239 short td_stopsched; /* (k) Scheduler stopped. */ 240 struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */ 241 const char *td_lockname; /* (t) Name of lock blocked on. */ 242 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */ 243 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */ 244 int td_intr_nesting_level; /* (k) Interrupt recursion. */ 245 int td_pinned; /* (k) Temporary cpu pin count. */ 246 struct ucred *td_ucred; /* (k) Reference to credentials. */ 247 u_int td_estcpu; /* (t) estimated cpu utilization */ 248 int td_slptick; /* (t) Time at sleep. */ 249 int td_blktick; /* (t) Time spent blocked. */ 250 int td_swvoltick; /* (t) Time at last SW_VOL switch. */ 251 u_int td_cow; /* (*) Number of copy-on-write faults */ 252 struct rusage td_ru; /* (t) rusage information. */ 253 struct rusage_ext td_rux; /* (t) Internal rusage information. */ 254 uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */ 255 uint64_t td_runtime; /* (t) How many cpu ticks we've run. */ 256 u_int td_pticks; /* (t) Statclock hits for profiling */ 257 u_int td_sticks; /* (t) Statclock hits in system mode. */ 258 u_int td_iticks; /* (t) Statclock hits in intr mode. */ 259 u_int td_uticks; /* (t) Statclock hits in user mode. */ 260 int td_intrval; /* (t) Return value for sleepq. */ 261 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */ 262 volatile u_int td_generation; /* (k) For detection of preemption */ 263 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */ 264 int td_xsig; /* (c) Signal for ptrace */ 265 u_long td_profil_addr; /* (k) Temporary addr until AST. */ 266 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */ 267 char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */ 268 struct file *td_fpop; /* (k) file referencing cdev under op */ 269 int td_dbgflags; /* (c) Userland debugger flags */ 270 struct ksiginfo td_dbgksi; /* (c) ksi reflected to debugger. */ 271 int td_ng_outbound; /* (k) Thread entered ng from above. */ 272 struct osd td_osd; /* (k) Object specific data. */ 273 struct vm_map_entry *td_map_def_user; /* (k) Deferred entries. */ 274 pid_t td_dbg_forked; /* (c) Child pid for debugger. */ 275 u_int td_vp_reserv; /* (k) Count of reserved vnodes. */ 276 int td_no_sleeping; /* (k) Sleeping disabled count. */ 277 int td_dom_rr_idx; /* (k) RR Numa domain selection. */ 278 #define td_endzero td_sigmask 279 280 /* Copied during fork1() or create_thread(). */ 281 #define td_startcopy td_endzero 282 sigset_t td_sigmask; /* (c) Current signal mask. */ 283 u_char td_rqindex; /* (t) Run queue index. */ 284 u_char td_base_pri; /* (t) Thread base kernel priority. */ 285 u_char td_priority; /* (t) Thread active priority. */ 286 u_char td_pri_class; /* (t) Scheduling class. */ 287 u_char td_user_pri; /* (t) User pri from estcpu and nice. */ 288 u_char td_base_user_pri; /* (t) Base user pri */ 289 #define td_endcopy td_pcb 290 291 /* 292 * Fields that must be manually set in fork1() or create_thread() 293 * or already have been set in the allocator, constructor, etc. 294 */ 295 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */ 296 enum { 297 TDS_INACTIVE = 0x0, 298 TDS_INHIBITED, 299 TDS_CAN_RUN, 300 TDS_RUNQ, 301 TDS_RUNNING 302 } td_state; /* (t) thread state */ 303 register_t td_retval[2]; /* (k) Syscall aux returns. */ 304 struct callout td_slpcallout; /* (h) Callout for sleep. */ 305 struct trapframe *td_frame; /* (k) */ 306 struct vm_object *td_kstack_obj;/* (a) Kstack object. */ 307 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */ 308 int td_kstack_pages; /* (a) Size of the kstack. */ 309 volatile u_int td_critnest; /* (k*) Critical section nest level. */ 310 struct mdthread td_md; /* (k) Any machine-dependent fields. */ 311 struct td_sched *td_sched; /* (*) Scheduler-specific data. */ 312 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */ 313 struct lpohead td_lprof[2]; /* (a) lock profiling objects. */ 314 struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */ 315 int td_errno; /* Error returned by last syscall. */ 316 struct vnet *td_vnet; /* (k) Effective vnet. */ 317 const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */ 318 struct trapframe *td_intr_frame;/* (k) Frame of the current irq */ 319 struct proc *td_rfppwait_p; /* (k) The vforked child */ 320 struct vm_page **td_ma; /* (k) uio pages held */ 321 int td_ma_cnt; /* (k) size of *td_ma */ 322 }; 323 324 struct mtx *thread_lock_block(struct thread *); 325 void thread_lock_unblock(struct thread *, struct mtx *); 326 void thread_lock_set(struct thread *, struct mtx *); 327 #define THREAD_LOCK_ASSERT(td, type) \ 328 do { \ 329 struct mtx *__m = (td)->td_lock; \ 330 if (__m != &blocked_lock) \ 331 mtx_assert(__m, (type)); \ 332 } while (0) 333 334 #ifdef INVARIANTS 335 #define THREAD_LOCKPTR_ASSERT(td, lock) \ 336 do { \ 337 struct mtx *__m = (td)->td_lock; \ 338 KASSERT((__m == &blocked_lock || __m == (lock)), \ 339 ("Thread %p lock %p does not match %p", td, __m, (lock))); \ 340 } while (0) 341 #else 342 #define THREAD_LOCKPTR_ASSERT(td, lock) 343 #endif 344 345 /* 346 * Flags kept in td_flags: 347 * To change these you MUST have the scheduler lock. 348 */ 349 #define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */ 350 #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */ 351 #define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */ 352 #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */ 353 #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */ 354 #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */ 355 #define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */ 356 #define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */ 357 #define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */ 358 #define TDF_UNUSED09 0x00000200 /* --available-- */ 359 #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */ 360 #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */ 361 #define TDF_TIMOFAIL 0x00001000 /* Timeout from sleep after we were awake. */ 362 #define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */ 363 #define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */ 364 #define TDF_NEEDSUSPCHK 0x00008000 /* Thread may need to suspend. */ 365 #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */ 366 #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */ 367 #define TDF_NOLOAD 0x00040000 /* Ignore during load avg calculations. */ 368 #define TDF_UNUSED19 0x00080000 /* --available-- */ 369 #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */ 370 #define TDF_UNUSED21 0x00200000 /* --available-- */ 371 #define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */ 372 #define TDF_UNUSED23 0x00800000 /* --available-- */ 373 #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */ 374 #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */ 375 #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */ 376 #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */ 377 #define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */ 378 #define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */ 379 #define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */ 380 381 /* Userland debug flags */ 382 #define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */ 383 #define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */ 384 #define TDB_USERWR 0x00000004 /* Debugger modified memory or registers */ 385 #define TDB_SCE 0x00000008 /* Thread performs syscall enter */ 386 #define TDB_SCX 0x00000010 /* Thread performs syscall exit */ 387 #define TDB_EXEC 0x00000020 /* TDB_SCX from exec(2) family */ 388 #define TDB_FORK 0x00000040 /* TDB_SCX from fork(2) that created new 389 process */ 390 #define TDB_STOPATFORK 0x00000080 /* Stop at the return from fork (child 391 only) */ 392 #define TDB_CHILD 0x00000100 /* New child indicator for ptrace() */ 393 394 /* 395 * "Private" flags kept in td_pflags: 396 * These are only written by curthread and thus need no locking. 397 */ 398 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */ 399 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */ 400 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */ 401 #define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */ 402 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */ 403 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */ 404 #define TDP_DEADLKTREAT 0x00000040 /* Lock aquisition - deadlock treatment. */ 405 #define TDP_NOFAULTING 0x00000080 /* Do not handle page faults. */ 406 #define TDP_UNUSED9 0x00000100 /* --available-- */ 407 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */ 408 #define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */ 409 #define TDP_SYNCIO 0x00000800 /* Local override, disable async i/o. */ 410 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */ 411 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */ 412 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */ 413 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */ 414 #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */ 415 #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */ 416 #define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */ 417 #define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */ 418 #define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */ 419 #define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */ 420 #define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */ 421 #define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */ 422 #define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */ 423 #define TDP_RFPPWAIT 0x02000000 /* Handle RFPPWAIT on syscall exit */ 424 #define TDP_RESETSPUR 0x04000000 /* Reset spurious page fault history. */ 425 #define TDP_NERRNO 0x08000000 /* Last errno is already in td_errno */ 426 #define TDP_UIOHELD 0x10000000 /* Current uio has pages held in td_ma */ 427 #define TDP_DEVMEMIO 0x20000000 /* Accessing memory for /dev/mem */ 428 #define TDP_EXECVMSPC 0x40000000 /* Execve destroyed old vmspace */ 429 430 /* 431 * Reasons that the current thread can not be run yet. 432 * More than one may apply. 433 */ 434 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */ 435 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */ 436 #define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */ 437 #define TDI_LOCK 0x0008 /* Stopped on a lock. */ 438 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */ 439 440 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING) 441 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL) 442 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED) 443 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED) 444 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK) 445 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT) 446 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING) 447 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ) 448 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN) 449 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED) 450 #define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED) 451 #define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD) 452 453 454 #define TD_SET_INHIB(td, inhib) do { \ 455 (td)->td_state = TDS_INHIBITED; \ 456 (td)->td_inhibitors |= (inhib); \ 457 } while (0) 458 459 #define TD_CLR_INHIB(td, inhib) do { \ 460 if (((td)->td_inhibitors & (inhib)) && \ 461 (((td)->td_inhibitors &= ~(inhib)) == 0)) \ 462 (td)->td_state = TDS_CAN_RUN; \ 463 } while (0) 464 465 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING) 466 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED) 467 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK) 468 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED) 469 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT) 470 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING) 471 472 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING) 473 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED) 474 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK) 475 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED) 476 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT) 477 478 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING 479 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ 480 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN 481 482 /* 483 * Process structure. 484 */ 485 struct proc { 486 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */ 487 TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */ 488 struct mtx p_slock; /* process spin lock */ 489 struct ucred *p_ucred; /* (c) Process owner's identity. */ 490 struct filedesc *p_fd; /* (b) Open files. */ 491 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */ 492 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */ 493 struct plimit *p_limit; /* (c) Process limits. */ 494 struct callout p_limco; /* (c) Limit callout handle */ 495 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */ 496 497 int p_flag; /* (c) P_* flags. */ 498 int p_flag2; /* (c) P2_* flags. */ 499 enum { 500 PRS_NEW = 0, /* In creation */ 501 PRS_NORMAL, /* threads can be run. */ 502 PRS_ZOMBIE 503 } p_state; /* (j/c) Process status. */ 504 pid_t p_pid; /* (b) Process identifier. */ 505 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */ 506 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */ 507 struct proc *p_pptr; /* (c + e) Pointer to parent process. */ 508 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */ 509 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */ 510 struct mtx p_mtx; /* (n) Lock for this struct. */ 511 struct ksiginfo *p_ksi; /* Locked by parent proc lock */ 512 sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */ 513 #define p_siglist p_sigqueue.sq_signals 514 515 /* The following fields are all zeroed upon creation in fork. */ 516 #define p_startzero p_oppid 517 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */ 518 struct vmspace *p_vmspace; /* (b) Address space. */ 519 u_int p_swtick; /* (c) Tick when swapped in or out. */ 520 struct itimerval p_realtimer; /* (c) Alarm timer. */ 521 struct rusage p_ru; /* (a) Exit information. */ 522 struct rusage_ext p_rux; /* (cj) Internal resource usage. */ 523 struct rusage_ext p_crux; /* (c) Internal child resource usage. */ 524 int p_profthreads; /* (c) Num threads in addupc_task. */ 525 volatile int p_exitthreads; /* (j) Number of threads exiting */ 526 int p_traceflag; /* (o) Kernel trace points. */ 527 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */ 528 struct ucred *p_tracecred; /* (o) Credentials to trace with. */ 529 struct vnode *p_textvp; /* (b) Vnode of executable. */ 530 u_int p_lock; /* (c) Proclock (prevent swap) count. */ 531 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */ 532 int p_sigparent; /* (c) Signal to parent on exit. */ 533 int p_sig; /* (n) For core dump/debugger XXX. */ 534 u_long p_code; /* (n) For core dump/debugger XXX. */ 535 u_int p_stops; /* (c) Stop event bitmask. */ 536 u_int p_stype; /* (c) Stop event type. */ 537 char p_step; /* (c) Process is stopped. */ 538 u_char p_pfsflags; /* (c) Procfs flags. */ 539 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */ 540 struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */ 541 struct thread *p_singlethread;/* (c + j) If single threading this is it */ 542 int p_suspcount; /* (j) Num threads in suspended mode. */ 543 struct thread *p_xthread; /* (c) Trap thread */ 544 int p_boundary_count;/* (j) Num threads at user boundary */ 545 int p_pendingcnt; /* how many signals are pending */ 546 struct itimers *p_itimers; /* (c) POSIX interval timers. */ 547 struct procdesc *p_procdesc; /* (e) Process descriptor, if any. */ 548 /* End area that is zeroed on creation. */ 549 #define p_endzero p_magic 550 551 /* The following fields are all copied upon creation in fork. */ 552 #define p_startcopy p_endzero 553 u_int p_magic; /* (b) Magic number. */ 554 int p_osrel; /* (x) osreldate for the 555 binary (from ELF note, if any) */ 556 char p_comm[MAXCOMLEN + 1]; /* (b) Process name. */ 557 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */ 558 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */ 559 struct pargs *p_args; /* (c) Process arguments. */ 560 rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */ 561 signed char p_nice; /* (c) Process "nice" value. */ 562 int p_fibnum; /* in this routing domain XXX MRT */ 563 /* End area that is copied on creation. */ 564 #define p_endcopy p_xstat 565 566 u_short p_xstat; /* (c) Exit status; also stop sig. */ 567 struct knlist p_klist; /* (c) Knotes attached to this proc. */ 568 int p_numthreads; /* (c) Number of threads. */ 569 struct mdproc p_md; /* Any machine-dependent fields. */ 570 struct callout p_itcallout; /* (h + c) Interval timer callout. */ 571 u_short p_acflag; /* (c) Accounting flags. */ 572 struct proc *p_peers; /* (r) */ 573 struct proc *p_leader; /* (b) */ 574 void *p_emuldata; /* (c) Emulator state data. */ 575 struct label *p_label; /* (*) Proc (not subject) MAC label. */ 576 struct p_sched *p_sched; /* (*) Scheduler-specific data. */ 577 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */ 578 LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/ 579 struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */ 580 struct cv p_pwait; /* (*) wait cv for exit/exec. */ 581 struct cv p_dbgwait; /* (*) wait cv for debugger attach 582 after fork. */ 583 uint64_t p_prev_runtime; /* (c) Resource usage accounting. */ 584 struct racct *p_racct; /* (b) Resource accounting. */ 585 u_char p_throttled; /* (c) Flag for racct pcpu throttling */ 586 /* 587 * An orphan is the child that has beed re-parented to the 588 * debugger as a result of attaching to it. Need to keep 589 * track of them for parent to be able to collect the exit 590 * status of what used to be children. 591 */ 592 LIST_ENTRY(proc) p_orphan; /* (e) List of orphan processes. */ 593 LIST_HEAD(, proc) p_orphans; /* (e) Pointer to list of orphans. */ 594 u_int p_treeflag; /* (e) P_TREE flags */ 595 }; 596 597 #define p_session p_pgrp->pg_session 598 #define p_pgid p_pgrp->pg_id 599 600 #define NOCPU 0xff /* For when we aren't on a CPU. */ 601 602 #define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock) 603 #define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock) 604 #define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type)) 605 606 /* These flags are kept in p_flag. */ 607 #define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */ 608 #define P_CONTROLT 0x00002 /* Has a controlling terminal. */ 609 #define P_KTHREAD 0x00004 /* Kernel thread (*). */ 610 #define P_FOLLOWFORK 0x00008 /* Attach parent debugger to children. */ 611 #define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */ 612 #define P_PROFIL 0x00020 /* Has started profiling. */ 613 #define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */ 614 #define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */ 615 #define P_SUGID 0x00100 /* Had set id privileges since last exec. */ 616 #define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */ 617 #define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */ 618 #define P_TRACED 0x00800 /* Debugged process being traced. */ 619 #define P_WAITED 0x01000 /* Someone is waiting for us. */ 620 #define P_WEXIT 0x02000 /* Working on exiting. */ 621 #define P_EXEC 0x04000 /* Process called exec. */ 622 #define P_WKILLED 0x08000 /* Killed, go to kernel/user boundary ASAP. */ 623 #define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */ 624 #define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */ 625 #define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */ 626 #define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */ 627 #define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */ 628 #define P_SIGEVENT 0x200000 /* Process pending signals changed. */ 629 #define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */ 630 #define P_HWPMC 0x800000 /* Process is using HWPMCs */ 631 #define P_JAILED 0x1000000 /* Process is in jail. */ 632 #define P_UNUSED1 0x2000000 633 #define P_INEXEC 0x4000000 /* Process is in execve(). */ 634 #define P_STATCHILD 0x8000000 /* Child process stopped or exited. */ 635 #define P_INMEM 0x10000000 /* Loaded into memory. */ 636 #define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */ 637 #define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */ 638 #define P_PPTRACE 0x80000000 /* PT_TRACEME by vforked child. */ 639 640 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE) 641 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED) 642 #define P_KILLED(p) ((p)->p_flag & P_WKILLED) 643 644 /* These flags are kept in p_flag2. */ 645 #define P2_INHERIT_PROTECTED 0x00000001 /* New children get P_PROTECTED. */ 646 647 /* Flags protected by proctree_lock, kept in p_treeflags. */ 648 #define P_TREE_ORPHANED 0x00000001 /* Reparented, on orphan list */ 649 #define P_TREE_FIRST_ORPHAN 0x00000002 /* First element of orphan 650 list */ 651 652 /* 653 * These were process status values (p_stat), now they are only used in 654 * legacy conversion code. 655 */ 656 #define SIDL 1 /* Process being created by fork. */ 657 #define SRUN 2 /* Currently runnable. */ 658 #define SSLEEP 3 /* Sleeping on an address. */ 659 #define SSTOP 4 /* Process debugging or suspension. */ 660 #define SZOMB 5 /* Awaiting collection by parent. */ 661 #define SWAIT 6 /* Waiting for interrupt. */ 662 #define SLOCK 7 /* Blocked on a lock. */ 663 664 #define P_MAGIC 0xbeefface 665 666 #ifdef _KERNEL 667 668 /* Types and flags for mi_switch(). */ 669 #define SW_TYPE_MASK 0xff /* First 8 bits are switch type */ 670 #define SWT_NONE 0 /* Unspecified switch. */ 671 #define SWT_PREEMPT 1 /* Switching due to preemption. */ 672 #define SWT_OWEPREEMPT 2 /* Switching due to opepreempt. */ 673 #define SWT_TURNSTILE 3 /* Turnstile contention. */ 674 #define SWT_SLEEPQ 4 /* Sleepq wait. */ 675 #define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */ 676 #define SWT_RELINQUISH 6 /* yield call. */ 677 #define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */ 678 #define SWT_IDLE 8 /* Switching from the idle thread. */ 679 #define SWT_IWAIT 9 /* Waiting for interrupts. */ 680 #define SWT_SUSPEND 10 /* Thread suspended. */ 681 #define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */ 682 #define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */ 683 #define SWT_COUNT 13 /* Number of switch types. */ 684 /* Flags */ 685 #define SW_VOL 0x0100 /* Voluntary switch. */ 686 #define SW_INVOL 0x0200 /* Involuntary switch. */ 687 #define SW_PREEMPT 0x0400 /* The invol switch is a preemption */ 688 689 /* How values for thread_single(). */ 690 #define SINGLE_NO_EXIT 0 691 #define SINGLE_EXIT 1 692 #define SINGLE_BOUNDARY 2 693 694 #ifdef MALLOC_DECLARE 695 MALLOC_DECLARE(M_PARGS); 696 MALLOC_DECLARE(M_PGRP); 697 MALLOC_DECLARE(M_SESSION); 698 MALLOC_DECLARE(M_SUBPROC); 699 #endif 700 701 #define FOREACH_PROC_IN_SYSTEM(p) \ 702 LIST_FOREACH((p), &allproc, p_list) 703 #define FOREACH_THREAD_IN_PROC(p, td) \ 704 TAILQ_FOREACH((td), &(p)->p_threads, td_plist) 705 706 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads) 707 708 /* 709 * We use process IDs <= pid_max <= PID_MAX; PID_MAX + 1 must also fit 710 * in a pid_t, as it is used to represent "no process group". 711 */ 712 #define PID_MAX 99999 713 #define NO_PID 100000 714 extern pid_t pid_max; 715 716 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p)) 717 718 719 #define STOPEVENT(p, e, v) do { \ 720 if ((p)->p_stops & (e)) { \ 721 PROC_LOCK(p); \ 722 stopevent((p), (e), (v)); \ 723 PROC_UNLOCK(p); \ 724 } \ 725 } while (0) 726 #define _STOPEVENT(p, e, v) do { \ 727 PROC_LOCK_ASSERT(p, MA_OWNED); \ 728 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.lock_object, \ 729 "checking stopevent %d", (e)); \ 730 if ((p)->p_stops & (e)) \ 731 stopevent((p), (e), (v)); \ 732 } while (0) 733 734 /* Lock and unlock a process. */ 735 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx) 736 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx) 737 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx) 738 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx) 739 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type)) 740 741 /* Lock and unlock a process group. */ 742 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx) 743 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx) 744 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx) 745 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type)) 746 747 #define PGRP_LOCK_PGSIGNAL(pg) do { \ 748 if ((pg) != NULL) \ 749 PGRP_LOCK(pg); \ 750 } while (0) 751 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \ 752 if ((pg) != NULL) \ 753 PGRP_UNLOCK(pg); \ 754 } while (0) 755 756 /* Lock and unlock a session. */ 757 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx) 758 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx) 759 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx) 760 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type)) 761 762 /* Hold process U-area in memory, normally for ptrace/procfs work. */ 763 #define PHOLD(p) do { \ 764 PROC_LOCK(p); \ 765 _PHOLD(p); \ 766 PROC_UNLOCK(p); \ 767 } while (0) 768 #define _PHOLD(p) do { \ 769 PROC_LOCK_ASSERT((p), MA_OWNED); \ 770 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \ 771 ("PHOLD of exiting process")); \ 772 (p)->p_lock++; \ 773 if (((p)->p_flag & P_INMEM) == 0) \ 774 faultin((p)); \ 775 } while (0) 776 #define PROC_ASSERT_HELD(p) do { \ 777 KASSERT((p)->p_lock > 0, ("process not held")); \ 778 } while (0) 779 780 #define PRELE(p) do { \ 781 PROC_LOCK((p)); \ 782 _PRELE((p)); \ 783 PROC_UNLOCK((p)); \ 784 } while (0) 785 #define _PRELE(p) do { \ 786 PROC_LOCK_ASSERT((p), MA_OWNED); \ 787 PROC_ASSERT_HELD(p); \ 788 (--(p)->p_lock); \ 789 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \ 790 wakeup(&(p)->p_lock); \ 791 } while (0) 792 #define PROC_ASSERT_NOT_HELD(p) do { \ 793 KASSERT((p)->p_lock == 0, ("process held")); \ 794 } while (0) 795 796 /* Check whether a thread is safe to be swapped out. */ 797 #define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP) 798 799 /* Control whether or not it is safe for curthread to sleep. */ 800 #define THREAD_NO_SLEEPING() ((curthread)->td_no_sleeping++) 801 802 #define THREAD_SLEEPING_OK() ((curthread)->td_no_sleeping--) 803 804 #define THREAD_CAN_SLEEP() ((curthread)->td_no_sleeping == 0) 805 806 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash]) 807 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl; 808 extern u_long pidhash; 809 #define TIDHASH(tid) (&tidhashtbl[(tid) & tidhash]) 810 extern LIST_HEAD(tidhashhead, thread) *tidhashtbl; 811 extern u_long tidhash; 812 extern struct rwlock tidhash_lock; 813 814 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash]) 815 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl; 816 extern u_long pgrphash; 817 818 extern struct sx allproc_lock; 819 extern struct sx proctree_lock; 820 extern struct mtx ppeers_lock; 821 extern struct proc proc0; /* Process slot for swapper. */ 822 extern struct thread thread0; /* Primary thread in proc0. */ 823 extern struct vmspace vmspace0; /* VM space for proc0. */ 824 extern int hogticks; /* Limit on kernel cpu hogs. */ 825 extern int lastpid; 826 extern int nprocs, maxproc; /* Current and max number of procs. */ 827 extern int maxprocperuid; /* Max procs per uid. */ 828 extern u_long ps_arg_cache_limit; 829 830 LIST_HEAD(proclist, proc); 831 TAILQ_HEAD(procqueue, proc); 832 TAILQ_HEAD(threadqueue, thread); 833 extern struct proclist allproc; /* List of all processes. */ 834 extern struct proclist zombproc; /* List of zombie processes. */ 835 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */ 836 837 extern struct uma_zone *proc_zone; 838 839 struct proc *pfind(pid_t); /* Find process by id. */ 840 struct proc *pfind_locked(pid_t pid); 841 struct pgrp *pgfind(pid_t); /* Find process group by id. */ 842 struct proc *zpfind(pid_t); /* Find zombie process by id. */ 843 844 /* 845 * pget() flags. 846 */ 847 #define PGET_HOLD 0x00001 /* Hold the process. */ 848 #define PGET_CANSEE 0x00002 /* Check against p_cansee(). */ 849 #define PGET_CANDEBUG 0x00004 /* Check against p_candebug(). */ 850 #define PGET_ISCURRENT 0x00008 /* Check that the found process is current. */ 851 #define PGET_NOTWEXIT 0x00010 /* Check that the process is not in P_WEXIT. */ 852 #define PGET_NOTINEXEC 0x00020 /* Check that the process is not in P_INEXEC. */ 853 #define PGET_NOTID 0x00040 /* Do not assume tid if pid > PID_MAX. */ 854 855 #define PGET_WANTREAD (PGET_HOLD | PGET_CANDEBUG | PGET_NOTWEXIT) 856 857 int pget(pid_t pid, int flags, struct proc **pp); 858 859 void ast(struct trapframe *framep); 860 struct thread *choosethread(void); 861 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum); 862 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, 863 struct session *sess); 864 int enterthispgrp(struct proc *p, struct pgrp *pgrp); 865 void faultin(struct proc *p); 866 void fixjobc(struct proc *p, struct pgrp *pgrp, int entering); 867 int fork1(struct thread *, int, int, struct proc **, int *, int); 868 void fork_exit(void (*)(void *, struct trapframe *), void *, 869 struct trapframe *); 870 void fork_return(struct thread *, struct trapframe *); 871 int inferior(struct proc *p); 872 void kern_yield(int); 873 void kick_proc0(void); 874 int leavepgrp(struct proc *p); 875 int maybe_preempt(struct thread *td); 876 void maybe_yield(void); 877 void mi_switch(int flags, struct thread *newtd); 878 int p_candebug(struct thread *td, struct proc *p); 879 int p_cansee(struct thread *td, struct proc *p); 880 int p_cansched(struct thread *td, struct proc *p); 881 int p_cansignal(struct thread *td, struct proc *p, int signum); 882 int p_canwait(struct thread *td, struct proc *p); 883 struct pargs *pargs_alloc(int len); 884 void pargs_drop(struct pargs *pa); 885 void pargs_hold(struct pargs *pa); 886 int proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb); 887 int proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb); 888 int proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb); 889 void procinit(void); 890 void proc_linkup0(struct proc *p, struct thread *td); 891 void proc_linkup(struct proc *p, struct thread *td); 892 struct proc *proc_realparent(struct proc *child); 893 void proc_reap(struct thread *td, struct proc *p, int *status, int options); 894 void proc_reparent(struct proc *child, struct proc *newparent); 895 struct pstats *pstats_alloc(void); 896 void pstats_fork(struct pstats *src, struct pstats *dst); 897 void pstats_free(struct pstats *ps); 898 int securelevel_ge(struct ucred *cr, int level); 899 int securelevel_gt(struct ucred *cr, int level); 900 void sess_hold(struct session *); 901 void sess_release(struct session *); 902 int setrunnable(struct thread *); 903 void setsugid(struct proc *p); 904 int should_yield(void); 905 int sigonstack(size_t sp); 906 void stopevent(struct proc *, u_int, u_int); 907 struct thread *tdfind(lwpid_t, pid_t); 908 void threadinit(void); 909 void tidhash_add(struct thread *); 910 void tidhash_remove(struct thread *); 911 void cpu_idle(int); 912 int cpu_idle_wakeup(int); 913 extern void (*cpu_idle_hook)(sbintime_t); /* Hook to machdep CPU idler. */ 914 void cpu_switch(struct thread *, struct thread *, struct mtx *); 915 void cpu_throw(struct thread *, struct thread *) __dead2; 916 void unsleep(struct thread *); 917 void userret(struct thread *, struct trapframe *); 918 919 void cpu_exit(struct thread *); 920 void exit1(struct thread *, int) __dead2; 921 struct syscall_args; 922 int cpu_fetch_syscall_args(struct thread *td, struct syscall_args *sa); 923 void cpu_fork(struct thread *, struct proc *, struct thread *, int); 924 void cpu_set_fork_handler(struct thread *, void (*)(void *), void *); 925 void cpu_set_syscall_retval(struct thread *, int); 926 void cpu_set_upcall(struct thread *td, struct thread *td0); 927 void cpu_set_upcall_kse(struct thread *, void (*)(void *), void *, 928 stack_t *); 929 int cpu_set_user_tls(struct thread *, void *tls_base); 930 void cpu_thread_alloc(struct thread *); 931 void cpu_thread_clean(struct thread *); 932 void cpu_thread_exit(struct thread *); 933 void cpu_thread_free(struct thread *); 934 void cpu_thread_swapin(struct thread *); 935 void cpu_thread_swapout(struct thread *); 936 struct thread *thread_alloc(int pages); 937 int thread_alloc_stack(struct thread *, int pages); 938 void thread_exit(void) __dead2; 939 void thread_free(struct thread *td); 940 void thread_link(struct thread *td, struct proc *p); 941 void thread_reap(void); 942 int thread_single(int how); 943 void thread_single_end(void); 944 void thread_stash(struct thread *td); 945 void thread_stopped(struct proc *p); 946 void childproc_stopped(struct proc *child, int reason); 947 void childproc_continued(struct proc *child); 948 void childproc_exited(struct proc *child); 949 int thread_suspend_check(int how); 950 void thread_suspend_switch(struct thread *); 951 void thread_suspend_one(struct thread *td); 952 void thread_unlink(struct thread *td); 953 void thread_unsuspend(struct proc *p); 954 int thread_unsuspend_one(struct thread *td); 955 void thread_wait(struct proc *p); 956 struct thread *thread_find(struct proc *p, lwpid_t tid); 957 958 static __inline int 959 curthread_pflags_set(int flags) 960 { 961 struct thread *td; 962 int save; 963 964 td = curthread; 965 save = ~flags | (td->td_pflags & flags); 966 td->td_pflags |= flags; 967 return (save); 968 } 969 970 static __inline void 971 curthread_pflags_restore(int save) 972 { 973 974 curthread->td_pflags &= save; 975 } 976 977 #endif /* _KERNEL */ 978 979 #endif /* !_SYS_PROC_H_ */
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