proc.h revision 321343
1/*- 2 * Copyright (c) 1986, 1989, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)proc.h 8.15 (Berkeley) 5/19/95 35 * $FreeBSD: stable/11/sys/sys/proc.h 321343 2017-07-21 18:06:57Z 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 <sys/_vm_domain.h> 67#include <machine/proc.h> /* Machine-dependent proc substruct. */ 68 69/* 70 * One structure allocated per session. 71 * 72 * List of locks 73 * (m) locked by s_mtx mtx 74 * (e) locked by proctree_lock sx 75 * (c) const until freeing 76 */ 77struct session { 78 u_int s_count; /* Ref cnt; pgrps in session - atomic. */ 79 struct proc *s_leader; /* (m + e) Session leader. */ 80 struct vnode *s_ttyvp; /* (m) Vnode of controlling tty. */ 81 struct cdev_priv *s_ttydp; /* (m) Device of controlling tty. */ 82 struct tty *s_ttyp; /* (e) Controlling tty. */ 83 pid_t s_sid; /* (c) Session ID. */ 84 /* (m) Setlogin() name: */ 85 char s_login[roundup(MAXLOGNAME, sizeof(long))]; 86 struct mtx s_mtx; /* Mutex to protect members. */ 87}; 88 89/* 90 * One structure allocated per process group. 91 * 92 * List of locks 93 * (m) locked by pg_mtx mtx 94 * (e) locked by proctree_lock sx 95 * (c) const until freeing 96 */ 97struct pgrp { 98 LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */ 99 LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */ 100 struct session *pg_session; /* (c) Pointer to session. */ 101 struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */ 102 pid_t pg_id; /* (c) Process group id. */ 103 int pg_jobc; /* (m) Job control process count. */ 104 struct mtx pg_mtx; /* Mutex to protect members */ 105}; 106 107/* 108 * pargs, used to hold a copy of the command line, if it had a sane length. 109 */ 110struct pargs { 111 u_int ar_ref; /* Reference count. */ 112 u_int ar_length; /* Length. */ 113 u_char ar_args[1]; /* Arguments. */ 114}; 115 116/*- 117 * Description of a process. 118 * 119 * This structure contains the information needed to manage a thread of 120 * control, known in UN*X as a process; it has references to substructures 121 * containing descriptions of things that the process uses, but may share 122 * with related processes. The process structure and the substructures 123 * are always addressable except for those marked "(CPU)" below, 124 * which might be addressable only on a processor on which the process 125 * is running. 126 * 127 * Below is a key of locks used to protect each member of struct proc. The 128 * lock is indicated by a reference to a specific character in parens in the 129 * associated comment. 130 * * - not yet protected 131 * a - only touched by curproc or parent during fork/wait 132 * b - created at fork, never changes 133 * (exception aiods switch vmspaces, but they are also 134 * marked 'P_SYSTEM' so hopefully it will be left alone) 135 * c - locked by proc mtx 136 * d - locked by allproc_lock lock 137 * e - locked by proctree_lock lock 138 * f - session mtx 139 * g - process group mtx 140 * h - callout_lock mtx 141 * i - by curproc or the master session mtx 142 * j - locked by proc slock 143 * k - only accessed by curthread 144 * k*- only accessed by curthread and from an interrupt 145 * kx- only accessed by curthread and by debugger 146 * l - the attaching proc or attaching proc parent 147 * m - Giant 148 * n - not locked, lazy 149 * o - ktrace lock 150 * q - td_contested lock 151 * r - p_peers lock 152 * s - see sleepq_switch(), sleeping_on_old_rtc(), and sleep(9) 153 * t - thread lock 154 * u - process stat lock 155 * w - process timer lock 156 * x - created at fork, only changes during single threading in exec 157 * y - created at first aio, doesn't change until exit or exec at which 158 * point we are single-threaded and only curthread changes it 159 * z - zombie threads lock 160 * 161 * If the locking key specifies two identifiers (for example, p_pptr) then 162 * either lock is sufficient for read access, but both locks must be held 163 * for write access. 164 */ 165struct cpuset; 166struct filecaps; 167struct filemon; 168struct kaioinfo; 169struct kaudit_record; 170struct kdtrace_proc; 171struct kdtrace_thread; 172struct mqueue_notifier; 173struct nlminfo; 174struct p_sched; 175struct proc; 176struct procdesc; 177struct racct; 178struct sbuf; 179struct sleepqueue; 180struct syscall_args; 181struct td_sched; 182struct thread; 183struct trapframe; 184struct turnstile; 185 186/* 187 * XXX: Does this belong in resource.h or resourcevar.h instead? 188 * Resource usage extension. The times in rusage structs in the kernel are 189 * never up to date. The actual times are kept as runtimes and tick counts 190 * (with control info in the "previous" times), and are converted when 191 * userland asks for rusage info. Backwards compatibility prevents putting 192 * this directly in the user-visible rusage struct. 193 * 194 * Locking for p_rux: (cu) means (u) for p_rux and (c) for p_crux. 195 * Locking for td_rux: (t) for all fields. 196 */ 197struct rusage_ext { 198 uint64_t rux_runtime; /* (cu) Real time. */ 199 uint64_t rux_uticks; /* (cu) Statclock hits in user mode. */ 200 uint64_t rux_sticks; /* (cu) Statclock hits in sys mode. */ 201 uint64_t rux_iticks; /* (cu) Statclock hits in intr mode. */ 202 uint64_t rux_uu; /* (c) Previous user time in usec. */ 203 uint64_t rux_su; /* (c) Previous sys time in usec. */ 204 uint64_t rux_tu; /* (c) Previous total time in usec. */ 205}; 206 207/* 208 * Kernel runnable context (thread). 209 * This is what is put to sleep and reactivated. 210 * Thread context. Processes may have multiple threads. 211 */ 212struct thread { 213 struct mtx *volatile td_lock; /* replaces sched lock */ 214 struct proc *td_proc; /* (*) Associated process. */ 215 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */ 216 TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */ 217 TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */ 218 TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */ 219 LIST_ENTRY(thread) td_hash; /* (d) Hash chain. */ 220 struct cpuset *td_cpuset; /* (t) CPU affinity mask. */ 221 struct seltd *td_sel; /* Select queue/channel. */ 222 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */ 223 struct turnstile *td_turnstile; /* (k) Associated turnstile. */ 224 struct rl_q_entry *td_rlqe; /* (k) Associated range lock entry. */ 225 struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */ 226 struct vm_domain_policy td_vm_dom_policy; /* (c) current numa domain policy */ 227 lwpid_t td_tid; /* (b) Thread ID. */ 228 uint64_t padding1[4]; 229 void *padding2[4]; 230 u_char td_lend_user_pri; /* (t) Lend user pri. */ 231 232/* Cleared during fork1() */ 233#define td_startzero td_flags 234 int td_flags; /* (t) TDF_* flags. */ 235 int td_inhibitors; /* (t) Why can not run. */ 236 int td_pflags; /* (k) Private thread (TDP_*) flags. */ 237 int td_dupfd; /* (k) Ret value from fdopen. XXX */ 238 int td_sqqueue; /* (t) Sleepqueue queue blocked on. */ 239 void *td_wchan; /* (t) Sleep address. */ 240 const char *td_wmesg; /* (t) Reason for sleep. */ 241 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */ 242 u_char td_tsqueue; /* (t) Turnstile queue blocked on. */ 243 short td_locks; /* (k) Debug: count of non-spin locks */ 244 short td_rw_rlocks; /* (k) Count of rwlock read locks. */ 245 short td_lk_slocks; /* (k) Count of lockmgr shared locks. */ 246 short td_stopsched; /* (k) Scheduler stopped. */ 247 struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */ 248 const char *td_lockname; /* (t) Name of lock blocked on. */ 249 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */ 250 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */ 251 int td_intr_nesting_level; /* (k) Interrupt recursion. */ 252 int td_pinned; /* (k) Temporary cpu pin count. */ 253 struct ucred *td_ucred; /* (k) Reference to credentials. */ 254 struct plimit *td_limit; /* (k) Resource limits. */ 255 int td_slptick; /* (t) Time at sleep. */ 256 int td_blktick; /* (t) Time spent blocked. */ 257 int td_swvoltick; /* (t) Time at last SW_VOL switch. */ 258 int td_swinvoltick; /* (t) Time at last SW_INVOL switch. */ 259 u_int td_cow; /* (*) Number of copy-on-write faults */ 260 struct rusage td_ru; /* (t) rusage information. */ 261 struct rusage_ext td_rux; /* (t) Internal rusage information. */ 262 uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */ 263 uint64_t td_runtime; /* (t) How many cpu ticks we've run. */ 264 u_int td_pticks; /* (t) Statclock hits for profiling */ 265 u_int td_sticks; /* (t) Statclock hits in system mode. */ 266 u_int td_iticks; /* (t) Statclock hits in intr mode. */ 267 u_int td_uticks; /* (t) Statclock hits in user mode. */ 268 int td_intrval; /* (t) Return value for sleepq. */ 269 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */ 270 volatile u_int td_generation; /* (k) For detection of preemption */ 271 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */ 272 int td_xsig; /* (c) Signal for ptrace */ 273 u_long td_profil_addr; /* (k) Temporary addr until AST. */ 274 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */ 275 char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */ 276 struct file *td_fpop; /* (k) file referencing cdev under op */ 277 int td_dbgflags; /* (c) Userland debugger flags */ 278 struct ksiginfo td_dbgksi; /* (c) ksi reflected to debugger. */ 279 int td_ng_outbound; /* (k) Thread entered ng from above. */ 280 struct osd td_osd; /* (k) Object specific data. */ 281 struct vm_map_entry *td_map_def_user; /* (k) Deferred entries. */ 282 pid_t td_dbg_forked; /* (c) Child pid for debugger. */ 283 u_int td_vp_reserv; /* (k) Count of reserved vnodes. */ 284 int td_no_sleeping; /* (k) Sleeping disabled count. */ 285 int td_dom_rr_idx; /* (k) RR Numa domain selection. */ 286 void *td_su; /* (k) FFS SU private */ 287 int td_rtcgen; /* (s) rtc_generation of abs. sleep */ 288#define td_endzero td_sigmask 289 290/* Copied during fork1() or create_thread(). */ 291#define td_startcopy td_endzero 292 sigset_t td_sigmask; /* (c) Current signal mask. */ 293 u_char td_rqindex; /* (t) Run queue index. */ 294 u_char td_base_pri; /* (t) Thread base kernel priority. */ 295 u_char td_priority; /* (t) Thread active priority. */ 296 u_char td_pri_class; /* (t) Scheduling class. */ 297 u_char td_user_pri; /* (t) User pri from estcpu and nice. */ 298 u_char td_base_user_pri; /* (t) Base user pri */ 299 u_int td_padding3; 300 u_int td_padding4; 301 uintptr_t td_rb_list; /* (k) Robust list head. */ 302 uintptr_t td_rbp_list; /* (k) Robust priv list head. */ 303 uintptr_t td_rb_inact; /* (k) Current in-action mutex loc. */ 304#define td_endcopy td_pcb 305 306/* 307 * Fields that must be manually set in fork1() or create_thread() 308 * or already have been set in the allocator, constructor, etc. 309 */ 310 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */ 311 enum { 312 TDS_INACTIVE = 0x0, 313 TDS_INHIBITED, 314 TDS_CAN_RUN, 315 TDS_RUNQ, 316 TDS_RUNNING 317 } td_state; /* (t) thread state */ 318 union { 319 register_t tdu_retval[2]; 320 off_t tdu_off; 321 } td_uretoff; /* (k) Syscall aux returns. */ 322#define td_retval td_uretoff.tdu_retval 323 u_int td_cowgen; /* (k) Generation of COW pointers. */ 324 struct callout td_slpcallout; /* (h) Callout for sleep. */ 325 struct trapframe *td_frame; /* (k) */ 326 struct vm_object *td_kstack_obj;/* (a) Kstack object. */ 327 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */ 328 int td_kstack_pages; /* (a) Size of the kstack. */ 329 volatile u_int td_critnest; /* (k*) Critical section nest level. */ 330 struct mdthread td_md; /* (k) Any machine-dependent fields. */ 331 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */ 332 struct lpohead td_lprof[2]; /* (a) lock profiling objects. */ 333 struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */ 334 int td_errno; /* Error returned by last syscall. */ 335 struct vnet *td_vnet; /* (k) Effective vnet. */ 336 const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */ 337 struct trapframe *td_intr_frame;/* (k) Frame of the current irq */ 338 struct proc *td_rfppwait_p; /* (k) The vforked child */ 339 struct vm_page **td_ma; /* (k) uio pages held */ 340 int td_ma_cnt; /* (k) size of *td_ma */ 341 void *td_emuldata; /* Emulator state data */ 342 int td_lastcpu; /* (t) Last cpu we were on. */ 343 int td_oncpu; /* (t) Which cpu we are on. */ 344 sbintime_t td_sleeptimo; /* (t) Sleep timeout. */ 345 sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */ 346#define td_siglist td_sigqueue.sq_signals 347 struct syscall_args td_sa; /* (kx) Syscall parameters. Copied on 348 fork for child tracing. */ 349}; 350 351struct thread0_storage { 352 struct thread t0st_thread; 353 uint64_t t0st_sched[10]; 354}; 355 356struct mtx *thread_lock_block(struct thread *); 357void thread_lock_unblock(struct thread *, struct mtx *); 358void thread_lock_set(struct thread *, struct mtx *); 359#define THREAD_LOCK_ASSERT(td, type) \ 360do { \ 361 struct mtx *__m = (td)->td_lock; \ 362 if (__m != &blocked_lock) \ 363 mtx_assert(__m, (type)); \ 364} while (0) 365 366#ifdef INVARIANTS 367#define THREAD_LOCKPTR_ASSERT(td, lock) \ 368do { \ 369 struct mtx *__m = (td)->td_lock; \ 370 KASSERT((__m == &blocked_lock || __m == (lock)), \ 371 ("Thread %p lock %p does not match %p", td, __m, (lock))); \ 372} while (0) 373 374#define TD_LOCKS_INC(td) ((td)->td_locks++) 375#define TD_LOCKS_DEC(td) ((td)->td_locks--) 376#else 377#define THREAD_LOCKPTR_ASSERT(td, lock) 378 379#define TD_LOCKS_INC(td) 380#define TD_LOCKS_DEC(td) 381#endif 382 383/* 384 * Flags kept in td_flags: 385 * To change these you MUST have the scheduler lock. 386 */ 387#define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */ 388#define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */ 389#define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */ 390#define TDF_SINTR 0x00000008 /* Sleep is interruptible. */ 391#define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */ 392#define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */ 393#define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */ 394#define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */ 395#define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */ 396#define TDF_ALLPROCSUSP 0x00000200 /* suspended by SINGLE_ALLPROC */ 397#define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */ 398#define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */ 399#define TDF_UNUSED12 0x00001000 /* --available-- */ 400#define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */ 401#define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */ 402#define TDF_NEEDSUSPCHK 0x00008000 /* Thread may need to suspend. */ 403#define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */ 404#define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */ 405#define TDF_NOLOAD 0x00040000 /* Ignore during load avg calculations. */ 406#define TDF_SERESTART 0x00080000 /* ERESTART on stop attempts. */ 407#define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */ 408#define TDF_SEINTR 0x00200000 /* EINTR on stop attempts. */ 409#define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */ 410#define TDF_UNUSED23 0x00800000 /* --available-- */ 411#define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */ 412#define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */ 413#define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */ 414#define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */ 415#define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */ 416#define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */ 417#define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */ 418 419/* Userland debug flags */ 420#define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */ 421#define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */ 422#define TDB_USERWR 0x00000004 /* Debugger modified memory or registers */ 423#define TDB_SCE 0x00000008 /* Thread performs syscall enter */ 424#define TDB_SCX 0x00000010 /* Thread performs syscall exit */ 425#define TDB_EXEC 0x00000020 /* TDB_SCX from exec(2) family */ 426#define TDB_FORK 0x00000040 /* TDB_SCX from fork(2) that created new 427 process */ 428#define TDB_STOPATFORK 0x00000080 /* Stop at the return from fork (child 429 only) */ 430#define TDB_CHILD 0x00000100 /* New child indicator for ptrace() */ 431#define TDB_BORN 0x00000200 /* New LWP indicator for ptrace() */ 432#define TDB_EXIT 0x00000400 /* Exiting LWP indicator for ptrace() */ 433#define TDB_VFORK 0x00000800 /* vfork indicator for ptrace() */ 434#define TDB_FSTP 0x00001000 /* The thread is PT_ATTACH leader */ 435 436/* 437 * "Private" flags kept in td_pflags: 438 * These are only written by curthread and thus need no locking. 439 */ 440#define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */ 441#define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */ 442#define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */ 443#define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */ 444#define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */ 445#define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */ 446#define TDP_DEADLKTREAT 0x00000040 /* Lock acquisition - deadlock treatment. */ 447#define TDP_NOFAULTING 0x00000080 /* Do not handle page faults. */ 448#define TDP_UNUSED9 0x00000100 /* --available-- */ 449#define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */ 450#define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */ 451#define TDP_SYNCIO 0x00000800 /* Local override, disable async i/o. */ 452#define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */ 453#define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */ 454#define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */ 455#define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */ 456#define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */ 457#define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */ 458#define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */ 459#define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */ 460#define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */ 461#define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */ 462#define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */ 463#define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */ 464#define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */ 465#define TDP_RFPPWAIT 0x02000000 /* Handle RFPPWAIT on syscall exit */ 466#define TDP_RESETSPUR 0x04000000 /* Reset spurious page fault history. */ 467#define TDP_NERRNO 0x08000000 /* Last errno is already in td_errno */ 468#define TDP_UIOHELD 0x10000000 /* Current uio has pages held in td_ma */ 469#define TDP_FORKING 0x20000000 /* Thread is being created through fork() */ 470#define TDP_EXECVMSPC 0x40000000 /* Execve destroyed old vmspace */ 471 472/* 473 * Reasons that the current thread can not be run yet. 474 * More than one may apply. 475 */ 476#define TDI_SUSPENDED 0x0001 /* On suspension queue. */ 477#define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */ 478#define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */ 479#define TDI_LOCK 0x0008 /* Stopped on a lock. */ 480#define TDI_IWAIT 0x0010 /* Awaiting interrupt. */ 481 482#define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING) 483#define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL) 484#define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED) 485#define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED) 486#define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK) 487#define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT) 488#define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING) 489#define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ) 490#define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN) 491#define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED) 492#define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED) 493#define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD) 494 495#define KTDSTATE(td) \ 496 (((td)->td_inhibitors & TDI_SLEEPING) != 0 ? "sleep" : \ 497 ((td)->td_inhibitors & TDI_SUSPENDED) != 0 ? "suspended" : \ 498 ((td)->td_inhibitors & TDI_SWAPPED) != 0 ? "swapped" : \ 499 ((td)->td_inhibitors & TDI_LOCK) != 0 ? "blocked" : \ 500 ((td)->td_inhibitors & TDI_IWAIT) != 0 ? "iwait" : "yielding") 501 502#define TD_SET_INHIB(td, inhib) do { \ 503 (td)->td_state = TDS_INHIBITED; \ 504 (td)->td_inhibitors |= (inhib); \ 505} while (0) 506 507#define TD_CLR_INHIB(td, inhib) do { \ 508 if (((td)->td_inhibitors & (inhib)) && \ 509 (((td)->td_inhibitors &= ~(inhib)) == 0)) \ 510 (td)->td_state = TDS_CAN_RUN; \ 511} while (0) 512 513#define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING) 514#define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED) 515#define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK) 516#define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED) 517#define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT) 518#define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING) 519 520#define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING) 521#define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED) 522#define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK) 523#define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED) 524#define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT) 525 526#define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING 527#define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ 528#define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN 529 530#define TD_SBDRY_INTR(td) \ 531 (((td)->td_flags & (TDF_SEINTR | TDF_SERESTART)) != 0) 532#define TD_SBDRY_ERRNO(td) \ 533 (((td)->td_flags & TDF_SEINTR) != 0 ? EINTR : ERESTART) 534 535/* 536 * Process structure. 537 */ 538struct proc { 539 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */ 540 TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */ 541 struct mtx p_slock; /* process spin lock */ 542 struct ucred *p_ucred; /* (c) Process owner's identity. */ 543 struct filedesc *p_fd; /* (b) Open files. */ 544 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */ 545 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */ 546 struct plimit *p_limit; /* (c) Resource limits. */ 547 struct callout p_limco; /* (c) Limit callout handle */ 548 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */ 549 550 int p_flag; /* (c) P_* flags. */ 551 int p_flag2; /* (c) P2_* flags. */ 552 enum { 553 PRS_NEW = 0, /* In creation */ 554 PRS_NORMAL, /* threads can be run. */ 555 PRS_ZOMBIE 556 } p_state; /* (j/c) Process status. */ 557 pid_t p_pid; /* (b) Process identifier. */ 558 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */ 559 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */ 560 struct proc *p_pptr; /* (c + e) Pointer to parent process. */ 561 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */ 562 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */ 563 struct proc *p_reaper; /* (e) My reaper. */ 564 LIST_HEAD(, proc) p_reaplist; /* (e) List of my descendants 565 (if I am reaper). */ 566 LIST_ENTRY(proc) p_reapsibling; /* (e) List of siblings - descendants of 567 the same reaper. */ 568 struct mtx p_mtx; /* (n) Lock for this struct. */ 569 struct mtx p_statmtx; /* Lock for the stats */ 570 struct mtx p_itimmtx; /* Lock for the virt/prof timers */ 571 struct mtx p_profmtx; /* Lock for the profiling */ 572 struct ksiginfo *p_ksi; /* Locked by parent proc lock */ 573 uint64_t padding1[4]; 574 void *padding2[4]; 575 576/* The following fields are all zeroed upon creation in fork. */ 577#define p_startzero p_oppid 578 pid_t p_oppid; /* (c + e) Save ppid in ptrace. XXX */ 579 struct vmspace *p_vmspace; /* (b) Address space. */ 580 u_int p_swtick; /* (c) Tick when swapped in or out. */ 581 u_int p_cowgen; /* (c) Generation of COW pointers. */ 582 struct itimerval p_realtimer; /* (c) Alarm timer. */ 583 struct rusage p_ru; /* (a) Exit information. */ 584 struct rusage_ext p_rux; /* (cu) Internal resource usage. */ 585 struct rusage_ext p_crux; /* (c) Internal child resource usage. */ 586 int p_profthreads; /* (c) Num threads in addupc_task. */ 587 volatile int p_exitthreads; /* (j) Number of threads exiting */ 588 int p_traceflag; /* (o) Kernel trace points. */ 589 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */ 590 struct ucred *p_tracecred; /* (o) Credentials to trace with. */ 591 struct vnode *p_textvp; /* (b) Vnode of executable. */ 592 u_int p_lock; /* (c) Proclock (prevent swap) count. */ 593 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */ 594 int p_sigparent; /* (c) Signal to parent on exit. */ 595 int p_sig; /* (n) For core dump/debugger XXX. */ 596 u_long p_code; /* (n) For core dump/debugger XXX. */ 597 u_int p_stops; /* (c) Stop event bitmask. */ 598 u_int p_stype; /* (c) Stop event type. */ 599 char p_step; /* (c) Process is stopped. */ 600 u_char p_pfsflags; /* (c) Procfs flags. */ 601 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */ 602 struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */ 603 struct thread *p_singlethread;/* (c + j) If single threading this is it */ 604 int p_suspcount; /* (j) Num threads in suspended mode. */ 605 struct thread *p_xthread; /* (c) Trap thread */ 606 int p_boundary_count;/* (j) Num threads at user boundary */ 607 int p_pendingcnt; /* how many signals are pending */ 608 struct itimers *p_itimers; /* (c) POSIX interval timers. */ 609 struct procdesc *p_procdesc; /* (e) Process descriptor, if any. */ 610 u_int p_treeflag; /* (e) P_TREE flags */ 611 int p_pendingexits; /* (c) Count of pending thread exits. */ 612 struct filemon *p_filemon; /* (c) filemon-specific data. */ 613/* End area that is zeroed on creation. */ 614#define p_endzero p_magic 615 616/* The following fields are all copied upon creation in fork. */ 617#define p_startcopy p_endzero 618 u_int p_magic; /* (b) Magic number. */ 619 int p_osrel; /* (x) osreldate for the 620 binary (from ELF note, if any) */ 621 char p_comm[MAXCOMLEN + 1]; /* (x) Process name. */ 622 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */ 623 struct pargs *p_args; /* (c) Process arguments. */ 624 rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */ 625 signed char p_nice; /* (c) Process "nice" value. */ 626 int p_fibnum; /* in this routing domain XXX MRT */ 627 pid_t p_reapsubtree; /* (e) Pid of the direct child of the 628 reaper which spawned 629 our subtree. */ 630/* End area that is copied on creation. */ 631#define p_endcopy p_xexit 632 633 u_int p_xexit; /* (c) Exit code. */ 634 u_int p_xsig; /* (c) Stop/kill sig. */ 635 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */ 636 struct knlist *p_klist; /* (c) Knotes attached to this proc. */ 637 int p_numthreads; /* (c) Number of threads. */ 638 struct mdproc p_md; /* Any machine-dependent fields. */ 639 struct callout p_itcallout; /* (h + c) Interval timer callout. */ 640 u_short p_acflag; /* (c) Accounting flags. */ 641 struct proc *p_peers; /* (r) */ 642 struct proc *p_leader; /* (b) */ 643 void *p_emuldata; /* (c) Emulator state data. */ 644 struct label *p_label; /* (*) Proc (not subject) MAC label. */ 645 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */ 646 LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/ 647 struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */ 648 struct cv p_pwait; /* (*) wait cv for exit/exec. */ 649 struct cv p_dbgwait; /* (*) wait cv for debugger attach 650 after fork. */ 651 uint64_t p_prev_runtime; /* (c) Resource usage accounting. */ 652 struct racct *p_racct; /* (b) Resource accounting. */ 653 int p_throttled; /* (c) Flag for racct pcpu throttling */ 654 struct vm_domain_policy p_vm_dom_policy; /* (c) process default VM domain, or -1 */ 655 /* 656 * An orphan is the child that has beed re-parented to the 657 * debugger as a result of attaching to it. Need to keep 658 * track of them for parent to be able to collect the exit 659 * status of what used to be children. 660 */ 661 LIST_ENTRY(proc) p_orphan; /* (e) List of orphan processes. */ 662 LIST_HEAD(, proc) p_orphans; /* (e) Pointer to list of orphans. */ 663 u_int p_ptevents; /* (c) ptrace() event mask. */ 664 uint16_t p_elf_machine; /* (x) ELF machine type */ 665 uint64_t p_elf_flags; /* (x) ELF flags */ 666 sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */ 667#define p_siglist p_sigqueue.sq_signals 668}; 669 670#define p_session p_pgrp->pg_session 671#define p_pgid p_pgrp->pg_id 672 673#define NOCPU (-1) /* For when we aren't on a CPU. */ 674#define NOCPU_OLD (255) 675#define MAXCPU_OLD (254) 676 677#define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock) 678#define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock) 679#define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type)) 680 681#define PROC_STATLOCK(p) mtx_lock_spin(&(p)->p_statmtx) 682#define PROC_STATUNLOCK(p) mtx_unlock_spin(&(p)->p_statmtx) 683#define PROC_STATLOCK_ASSERT(p, type) mtx_assert(&(p)->p_statmtx, (type)) 684 685#define PROC_ITIMLOCK(p) mtx_lock_spin(&(p)->p_itimmtx) 686#define PROC_ITIMUNLOCK(p) mtx_unlock_spin(&(p)->p_itimmtx) 687#define PROC_ITIMLOCK_ASSERT(p, type) mtx_assert(&(p)->p_itimmtx, (type)) 688 689#define PROC_PROFLOCK(p) mtx_lock_spin(&(p)->p_profmtx) 690#define PROC_PROFUNLOCK(p) mtx_unlock_spin(&(p)->p_profmtx) 691#define PROC_PROFLOCK_ASSERT(p, type) mtx_assert(&(p)->p_profmtx, (type)) 692 693/* These flags are kept in p_flag. */ 694#define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */ 695#define P_CONTROLT 0x00002 /* Has a controlling terminal. */ 696#define P_KPROC 0x00004 /* Kernel process. */ 697#define P_UNUSED3 0x00008 /* --available-- */ 698#define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */ 699#define P_PROFIL 0x00020 /* Has started profiling. */ 700#define P_STOPPROF 0x00040 /* Has thread requesting to stop profiling. */ 701#define P_HADTHREADS 0x00080 /* Has had threads (no cleanup shortcuts) */ 702#define P_SUGID 0x00100 /* Had set id privileges since last exec. */ 703#define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */ 704#define P_SINGLE_EXIT 0x00400 /* Threads suspending should exit, not wait. */ 705#define P_TRACED 0x00800 /* Debugged process being traced. */ 706#define P_WAITED 0x01000 /* Someone is waiting for us. */ 707#define P_WEXIT 0x02000 /* Working on exiting. */ 708#define P_EXEC 0x04000 /* Process called exec. */ 709#define P_WKILLED 0x08000 /* Killed, go to kernel/user boundary ASAP. */ 710#define P_CONTINUED 0x10000 /* Proc has continued from a stopped state. */ 711#define P_STOPPED_SIG 0x20000 /* Stopped due to SIGSTOP/SIGTSTP. */ 712#define P_STOPPED_TRACE 0x40000 /* Stopped because of tracing. */ 713#define P_STOPPED_SINGLE 0x80000 /* Only 1 thread can continue (not to user). */ 714#define P_PROTECTED 0x100000 /* Do not kill on memory overcommit. */ 715#define P_SIGEVENT 0x200000 /* Process pending signals changed. */ 716#define P_SINGLE_BOUNDARY 0x400000 /* Threads should suspend at user boundary. */ 717#define P_HWPMC 0x800000 /* Process is using HWPMCs */ 718#define P_JAILED 0x1000000 /* Process is in jail. */ 719#define P_TOTAL_STOP 0x2000000 /* Stopped in stop_all_proc. */ 720#define P_INEXEC 0x4000000 /* Process is in execve(). */ 721#define P_STATCHILD 0x8000000 /* Child process stopped or exited. */ 722#define P_INMEM 0x10000000 /* Loaded into memory. */ 723#define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */ 724#define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */ 725#define P_PPTRACE 0x80000000 /* PT_TRACEME by vforked child. */ 726 727#define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE) 728#define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED) 729#define P_KILLED(p) ((p)->p_flag & P_WKILLED) 730 731/* These flags are kept in p_flag2. */ 732#define P2_INHERIT_PROTECTED 0x00000001 /* New children get P_PROTECTED. */ 733#define P2_NOTRACE 0x00000002 /* No ptrace(2) attach or coredumps. */ 734#define P2_NOTRACE_EXEC 0x00000004 /* Keep P2_NOPTRACE on exec(2). */ 735#define P2_AST_SU 0x00000008 /* Handles SU ast for kthreads. */ 736#define P2_PTRACE_FSTP 0x00000010 /* SIGSTOP from PT_ATTACH not yet handled. */ 737#define P2_TRAPCAP 0x00000020 /* SIGTRAP on ENOTCAPABLE */ 738 739/* Flags protected by proctree_lock, kept in p_treeflags. */ 740#define P_TREE_ORPHANED 0x00000001 /* Reparented, on orphan list */ 741#define P_TREE_FIRST_ORPHAN 0x00000002 /* First element of orphan 742 list */ 743#define P_TREE_REAPER 0x00000004 /* Reaper of subtree */ 744 745/* 746 * These were process status values (p_stat), now they are only used in 747 * legacy conversion code. 748 */ 749#define SIDL 1 /* Process being created by fork. */ 750#define SRUN 2 /* Currently runnable. */ 751#define SSLEEP 3 /* Sleeping on an address. */ 752#define SSTOP 4 /* Process debugging or suspension. */ 753#define SZOMB 5 /* Awaiting collection by parent. */ 754#define SWAIT 6 /* Waiting for interrupt. */ 755#define SLOCK 7 /* Blocked on a lock. */ 756 757#define P_MAGIC 0xbeefface 758 759#ifdef _KERNEL 760 761/* Types and flags for mi_switch(). */ 762#define SW_TYPE_MASK 0xff /* First 8 bits are switch type */ 763#define SWT_NONE 0 /* Unspecified switch. */ 764#define SWT_PREEMPT 1 /* Switching due to preemption. */ 765#define SWT_OWEPREEMPT 2 /* Switching due to owepreempt. */ 766#define SWT_TURNSTILE 3 /* Turnstile contention. */ 767#define SWT_SLEEPQ 4 /* Sleepq wait. */ 768#define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */ 769#define SWT_RELINQUISH 6 /* yield call. */ 770#define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */ 771#define SWT_IDLE 8 /* Switching from the idle thread. */ 772#define SWT_IWAIT 9 /* Waiting for interrupts. */ 773#define SWT_SUSPEND 10 /* Thread suspended. */ 774#define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */ 775#define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */ 776#define SWT_COUNT 13 /* Number of switch types. */ 777/* Flags */ 778#define SW_VOL 0x0100 /* Voluntary switch. */ 779#define SW_INVOL 0x0200 /* Involuntary switch. */ 780#define SW_PREEMPT 0x0400 /* The invol switch is a preemption */ 781 782/* How values for thread_single(). */ 783#define SINGLE_NO_EXIT 0 784#define SINGLE_EXIT 1 785#define SINGLE_BOUNDARY 2 786#define SINGLE_ALLPROC 3 787 788#ifdef MALLOC_DECLARE 789MALLOC_DECLARE(M_PARGS); 790MALLOC_DECLARE(M_PGRP); 791MALLOC_DECLARE(M_SESSION); 792MALLOC_DECLARE(M_SUBPROC); 793#endif 794 795#define FOREACH_PROC_IN_SYSTEM(p) \ 796 LIST_FOREACH((p), &allproc, p_list) 797#define FOREACH_THREAD_IN_PROC(p, td) \ 798 TAILQ_FOREACH((td), &(p)->p_threads, td_plist) 799 800#define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads) 801 802/* 803 * We use process IDs <= pid_max <= PID_MAX; PID_MAX + 1 must also fit 804 * in a pid_t, as it is used to represent "no process group". 805 */ 806#define PID_MAX 99999 807#define NO_PID 100000 808extern pid_t pid_max; 809 810#define SESS_LEADER(p) ((p)->p_session->s_leader == (p)) 811 812 813#define STOPEVENT(p, e, v) do { \ 814 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, \ 815 "checking stopevent %d", (e)); \ 816 if ((p)->p_stops & (e)) { \ 817 PROC_LOCK(p); \ 818 stopevent((p), (e), (v)); \ 819 PROC_UNLOCK(p); \ 820 } \ 821} while (0) 822#define _STOPEVENT(p, e, v) do { \ 823 PROC_LOCK_ASSERT(p, MA_OWNED); \ 824 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.lock_object, \ 825 "checking stopevent %d", (e)); \ 826 if ((p)->p_stops & (e)) \ 827 stopevent((p), (e), (v)); \ 828} while (0) 829 830/* Lock and unlock a process. */ 831#define PROC_LOCK(p) mtx_lock(&(p)->p_mtx) 832#define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx) 833#define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx) 834#define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx) 835#define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type)) 836 837/* Lock and unlock a process group. */ 838#define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx) 839#define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx) 840#define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx) 841#define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type)) 842 843#define PGRP_LOCK_PGSIGNAL(pg) do { \ 844 if ((pg) != NULL) \ 845 PGRP_LOCK(pg); \ 846} while (0) 847#define PGRP_UNLOCK_PGSIGNAL(pg) do { \ 848 if ((pg) != NULL) \ 849 PGRP_UNLOCK(pg); \ 850} while (0) 851 852/* Lock and unlock a session. */ 853#define SESS_LOCK(s) mtx_lock(&(s)->s_mtx) 854#define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx) 855#define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx) 856#define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type)) 857 858/* 859 * Non-zero p_lock ensures that: 860 * - exit1() is not performed until p_lock reaches zero; 861 * - the process' threads stack are not swapped out if they are currently 862 * not (P_INMEM). 863 * 864 * PHOLD() asserts that the process (except the current process) is 865 * not exiting, increments p_lock and swaps threads stacks into memory, 866 * if needed. 867 * _PHOLD() is same as PHOLD(), it takes the process locked. 868 * _PHOLD_LITE() also takes the process locked, but comparing with 869 * _PHOLD(), it only guarantees that exit1() is not executed, 870 * faultin() is not called. 871 */ 872#define PHOLD(p) do { \ 873 PROC_LOCK(p); \ 874 _PHOLD(p); \ 875 PROC_UNLOCK(p); \ 876} while (0) 877#define _PHOLD(p) do { \ 878 PROC_LOCK_ASSERT((p), MA_OWNED); \ 879 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \ 880 ("PHOLD of exiting process %p", p)); \ 881 (p)->p_lock++; \ 882 if (((p)->p_flag & P_INMEM) == 0) \ 883 faultin((p)); \ 884} while (0) 885#define _PHOLD_LITE(p) do { \ 886 PROC_LOCK_ASSERT((p), MA_OWNED); \ 887 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \ 888 ("PHOLD of exiting process %p", p)); \ 889 (p)->p_lock++; \ 890} while (0) 891#define PROC_ASSERT_HELD(p) do { \ 892 KASSERT((p)->p_lock > 0, ("process %p not held", p)); \ 893} while (0) 894 895#define PRELE(p) do { \ 896 PROC_LOCK((p)); \ 897 _PRELE((p)); \ 898 PROC_UNLOCK((p)); \ 899} while (0) 900#define _PRELE(p) do { \ 901 PROC_LOCK_ASSERT((p), MA_OWNED); \ 902 PROC_ASSERT_HELD(p); \ 903 (--(p)->p_lock); \ 904 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \ 905 wakeup(&(p)->p_lock); \ 906} while (0) 907#define PROC_ASSERT_NOT_HELD(p) do { \ 908 KASSERT((p)->p_lock == 0, ("process %p held", p)); \ 909} while (0) 910 911#define PROC_UPDATE_COW(p) do { \ 912 PROC_LOCK_ASSERT((p), MA_OWNED); \ 913 (p)->p_cowgen++; \ 914} while (0) 915 916/* Check whether a thread is safe to be swapped out. */ 917#define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP) 918 919/* Control whether or not it is safe for curthread to sleep. */ 920#define THREAD_NO_SLEEPING() ((curthread)->td_no_sleeping++) 921 922#define THREAD_SLEEPING_OK() ((curthread)->td_no_sleeping--) 923 924#define THREAD_CAN_SLEEP() ((curthread)->td_no_sleeping == 0) 925 926#define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash]) 927extern LIST_HEAD(pidhashhead, proc) *pidhashtbl; 928extern u_long pidhash; 929#define TIDHASH(tid) (&tidhashtbl[(tid) & tidhash]) 930extern LIST_HEAD(tidhashhead, thread) *tidhashtbl; 931extern u_long tidhash; 932extern struct rwlock tidhash_lock; 933 934#define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash]) 935extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl; 936extern u_long pgrphash; 937 938extern struct sx allproc_lock; 939extern int allproc_gen; 940extern struct sx proctree_lock; 941extern struct mtx ppeers_lock; 942extern struct proc proc0; /* Process slot for swapper. */ 943extern struct thread0_storage thread0_st; /* Primary thread in proc0. */ 944#define thread0 (thread0_st.t0st_thread) 945extern struct vmspace vmspace0; /* VM space for proc0. */ 946extern int hogticks; /* Limit on kernel cpu hogs. */ 947extern int lastpid; 948extern int nprocs, maxproc; /* Current and max number of procs. */ 949extern int maxprocperuid; /* Max procs per uid. */ 950extern u_long ps_arg_cache_limit; 951 952LIST_HEAD(proclist, proc); 953TAILQ_HEAD(procqueue, proc); 954TAILQ_HEAD(threadqueue, thread); 955extern struct proclist allproc; /* List of all processes. */ 956extern struct proclist zombproc; /* List of zombie processes. */ 957extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */ 958 959extern struct uma_zone *proc_zone; 960 961struct proc *pfind(pid_t); /* Find process by id. */ 962struct proc *pfind_locked(pid_t pid); 963struct pgrp *pgfind(pid_t); /* Find process group by id. */ 964struct proc *zpfind(pid_t); /* Find zombie process by id. */ 965 966struct fork_req { 967 int fr_flags; 968 int fr_pages; 969 int *fr_pidp; 970 struct proc **fr_procp; 971 int *fr_pd_fd; 972 int fr_pd_flags; 973 struct filecaps *fr_pd_fcaps; 974}; 975 976/* 977 * pget() flags. 978 */ 979#define PGET_HOLD 0x00001 /* Hold the process. */ 980#define PGET_CANSEE 0x00002 /* Check against p_cansee(). */ 981#define PGET_CANDEBUG 0x00004 /* Check against p_candebug(). */ 982#define PGET_ISCURRENT 0x00008 /* Check that the found process is current. */ 983#define PGET_NOTWEXIT 0x00010 /* Check that the process is not in P_WEXIT. */ 984#define PGET_NOTINEXEC 0x00020 /* Check that the process is not in P_INEXEC. */ 985#define PGET_NOTID 0x00040 /* Do not assume tid if pid > PID_MAX. */ 986 987#define PGET_WANTREAD (PGET_HOLD | PGET_CANDEBUG | PGET_NOTWEXIT) 988 989int pget(pid_t pid, int flags, struct proc **pp); 990 991void ast(struct trapframe *framep); 992struct thread *choosethread(void); 993int cr_cansignal(struct ucred *cred, struct proc *proc, int signum); 994int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, 995 struct session *sess); 996int enterthispgrp(struct proc *p, struct pgrp *pgrp); 997void faultin(struct proc *p); 998void fixjobc(struct proc *p, struct pgrp *pgrp, int entering); 999int fork1(struct thread *, struct fork_req *); 1000void fork_exit(void (*)(void *, struct trapframe *), void *, 1001 struct trapframe *); 1002void fork_return(struct thread *, struct trapframe *); 1003int inferior(struct proc *p); 1004void kern_yield(int); 1005void kick_proc0(void); 1006void killjobc(void); 1007int leavepgrp(struct proc *p); 1008int maybe_preempt(struct thread *td); 1009void maybe_yield(void); 1010void mi_switch(int flags, struct thread *newtd); 1011int p_candebug(struct thread *td, struct proc *p); 1012int p_cansee(struct thread *td, struct proc *p); 1013int p_cansched(struct thread *td, struct proc *p); 1014int p_cansignal(struct thread *td, struct proc *p, int signum); 1015int p_canwait(struct thread *td, struct proc *p); 1016struct pargs *pargs_alloc(int len); 1017void pargs_drop(struct pargs *pa); 1018void pargs_hold(struct pargs *pa); 1019int proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb); 1020int proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb); 1021int proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb); 1022void procinit(void); 1023void proc_linkup0(struct proc *p, struct thread *td); 1024void proc_linkup(struct proc *p, struct thread *td); 1025struct proc *proc_realparent(struct proc *child); 1026void proc_reap(struct thread *td, struct proc *p, int *status, int options); 1027void proc_reparent(struct proc *child, struct proc *newparent); 1028void proc_set_traced(struct proc *p, bool stop); 1029struct pstats *pstats_alloc(void); 1030void pstats_fork(struct pstats *src, struct pstats *dst); 1031void pstats_free(struct pstats *ps); 1032void reaper_abandon_children(struct proc *p, bool exiting); 1033int securelevel_ge(struct ucred *cr, int level); 1034int securelevel_gt(struct ucred *cr, int level); 1035void sess_hold(struct session *); 1036void sess_release(struct session *); 1037int setrunnable(struct thread *); 1038void setsugid(struct proc *p); 1039int should_yield(void); 1040int sigonstack(size_t sp); 1041void stopevent(struct proc *, u_int, u_int); 1042struct thread *tdfind(lwpid_t, pid_t); 1043void threadinit(void); 1044void tidhash_add(struct thread *); 1045void tidhash_remove(struct thread *); 1046void cpu_idle(int); 1047int cpu_idle_wakeup(int); 1048extern void (*cpu_idle_hook)(sbintime_t); /* Hook to machdep CPU idler. */ 1049void cpu_switch(struct thread *, struct thread *, struct mtx *); 1050void cpu_throw(struct thread *, struct thread *) __dead2; 1051void unsleep(struct thread *); 1052void userret(struct thread *, struct trapframe *); 1053 1054void cpu_exit(struct thread *); 1055void exit1(struct thread *, int, int) __dead2; 1056void cpu_copy_thread(struct thread *td, struct thread *td0); 1057int cpu_fetch_syscall_args(struct thread *td); 1058void cpu_fork(struct thread *, struct proc *, struct thread *, int); 1059void cpu_fork_kthread_handler(struct thread *, void (*)(void *), void *); 1060void cpu_set_syscall_retval(struct thread *, int); 1061void cpu_set_upcall(struct thread *, void (*)(void *), void *, 1062 stack_t *); 1063int cpu_set_user_tls(struct thread *, void *tls_base); 1064void cpu_thread_alloc(struct thread *); 1065void cpu_thread_clean(struct thread *); 1066void cpu_thread_exit(struct thread *); 1067void cpu_thread_free(struct thread *); 1068void cpu_thread_swapin(struct thread *); 1069void cpu_thread_swapout(struct thread *); 1070struct thread *thread_alloc(int pages); 1071int thread_alloc_stack(struct thread *, int pages); 1072void thread_cow_get_proc(struct thread *newtd, struct proc *p); 1073void thread_cow_get(struct thread *newtd, struct thread *td); 1074void thread_cow_free(struct thread *td); 1075void thread_cow_update(struct thread *td); 1076int thread_create(struct thread *td, struct rtprio *rtp, 1077 int (*initialize_thread)(struct thread *, void *), void *thunk); 1078void thread_exit(void) __dead2; 1079void thread_free(struct thread *td); 1080void thread_link(struct thread *td, struct proc *p); 1081void thread_reap(void); 1082int thread_single(struct proc *p, int how); 1083void thread_single_end(struct proc *p, int how); 1084void thread_stash(struct thread *td); 1085void thread_stopped(struct proc *p); 1086void childproc_stopped(struct proc *child, int reason); 1087void childproc_continued(struct proc *child); 1088void childproc_exited(struct proc *child); 1089int thread_suspend_check(int how); 1090bool thread_suspend_check_needed(void); 1091void thread_suspend_switch(struct thread *, struct proc *p); 1092void thread_suspend_one(struct thread *td); 1093void thread_unlink(struct thread *td); 1094void thread_unsuspend(struct proc *p); 1095void thread_wait(struct proc *p); 1096struct thread *thread_find(struct proc *p, lwpid_t tid); 1097 1098void stop_all_proc(void); 1099void resume_all_proc(void); 1100 1101static __inline int 1102curthread_pflags_set(int flags) 1103{ 1104 struct thread *td; 1105 int save; 1106 1107 td = curthread; 1108 save = ~flags | (td->td_pflags & flags); 1109 td->td_pflags |= flags; 1110 return (save); 1111} 1112 1113static __inline void 1114curthread_pflags_restore(int save) 1115{ 1116 1117 curthread->td_pflags &= save; 1118} 1119 1120static __inline __pure2 struct td_sched * 1121td_get_sched(struct thread *td) 1122{ 1123 1124 return ((struct td_sched *)&td[1]); 1125} 1126 1127extern void (*softdep_ast_cleanup)(struct thread *); 1128static __inline void 1129td_softdep_cleanup(struct thread *td) 1130{ 1131 1132 if (td->td_su != NULL && softdep_ast_cleanup != NULL) 1133 softdep_ast_cleanup(td); 1134} 1135 1136#endif /* _KERNEL */ 1137 1138#endif /* !_SYS_PROC_H_ */ 1139