1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1986, 1989, 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37#ifndef _SYS_PROC_H_ 38#define _SYS_PROC_H_ 39 40#include <sys/callout.h> /* For struct callout. */ 41#include <sys/event.h> /* For struct klist. */ 42#ifdef _KERNEL 43#include <sys/_eventhandler.h> 44#endif 45#include <sys/condvar.h> 46#ifndef _KERNEL 47#include <sys/filedesc.h> 48#endif 49#include <sys/queue.h> 50#include <sys/_lock.h> 51#include <sys/lock_profile.h> 52#include <sys/_mutex.h> 53#include <sys/osd.h> 54#include <sys/priority.h> 55#include <sys/rtprio.h> /* XXX. */ 56#include <sys/runq.h> 57#include <sys/resource.h> 58#include <sys/sigio.h> 59#include <sys/signal.h> 60#include <sys/signalvar.h> 61#ifndef _KERNEL 62#include <sys/time.h> /* For structs itimerval, timeval. */ 63#else 64#include <sys/pcpu.h> 65#include <sys/systm.h> 66#endif 67#include <sys/ucontext.h> 68#include <sys/ucred.h> 69#include <sys/types.h> 70#include <sys/_domainset.h> 71 72#include <machine/proc.h> /* Machine-dependent proc substruct. */ 73#ifdef _KERNEL 74#include <machine/cpu.h> 75#endif 76 77/* 78 * One structure allocated per session. 79 * 80 * List of locks 81 * (m) locked by s_mtx mtx 82 * (e) locked by proctree_lock sx 83 * (c) const until freeing 84 */ 85struct session { 86 u_int s_count; /* Ref cnt; pgrps in session - atomic. */ 87 struct proc *s_leader; /* (m + e) Session leader. */ 88 struct vnode *s_ttyvp; /* (m) Vnode of controlling tty. */ 89 struct cdev_priv *s_ttydp; /* (m) Device of controlling tty. */ 90 struct tty *s_ttyp; /* (e) Controlling tty. */ 91 pid_t s_sid; /* (c) Session ID. */ 92 /* (m) Setlogin() name: */ 93 char s_login[roundup(MAXLOGNAME, sizeof(long))]; 94 struct mtx s_mtx; /* Mutex to protect members. */ 95}; 96 97/* 98 * One structure allocated per process group. 99 * 100 * List of locks 101 * (m) locked by pg_mtx mtx 102 * (e) locked by proctree_lock sx 103 * (c) const until freeing 104 */ 105struct pgrp { 106 LIST_ENTRY(pgrp) pg_hash; /* (e) Hash chain. */ 107 LIST_HEAD(, proc) pg_members; /* (m + e) Pointer to pgrp members. */ 108 struct session *pg_session; /* (c) Pointer to session. */ 109 struct sigiolst pg_sigiolst; /* (m) List of sigio sources. */ 110 pid_t pg_id; /* (c) Process group id. */ 111 struct mtx pg_mtx; /* Mutex to protect members */ 112 int pg_flags; /* (m) PGRP_ flags */ 113 struct sx pg_killsx; /* Mutual exclusion between group member 114 * fork() and killpg() */ 115}; 116 117#define PGRP_ORPHANED 0x00000001 /* Group is orphaned */ 118 119/* 120 * pargs, used to hold a copy of the command line, if it had a sane length. 121 */ 122struct pargs { 123 u_int ar_ref; /* Reference count. */ 124 u_int ar_length; /* Length. */ 125 u_char ar_args[1]; /* Arguments. */ 126}; 127 128/*- 129 * Description of a process. 130 * 131 * This structure contains the information needed to manage a thread of 132 * control, known in UN*X as a process; it has references to substructures 133 * containing descriptions of things that the process uses, but may share 134 * with related processes. The process structure and the substructures 135 * are always addressable except for those marked "(CPU)" below, 136 * which might be addressable only on a processor on which the process 137 * is running. 138 * 139 * Below is a key of locks used to protect each member of struct proc. The 140 * lock is indicated by a reference to a specific character in parens in the 141 * associated comment. 142 * * - not yet protected 143 * a - only touched by curproc or parent during fork/wait 144 * b - created at fork, never changes 145 * (exception aiods switch vmspaces, but they are also 146 * marked 'P_SYSTEM' so hopefully it will be left alone) 147 * c - locked by proc mtx 148 * d - locked by allproc_lock lock 149 * e - locked by proctree_lock lock 150 * f - session mtx 151 * g - process group mtx 152 * h - callout_lock mtx 153 * i - by curproc or the master session mtx 154 * j - locked by proc slock 155 * k - only accessed by curthread 156 * k*- only accessed by curthread and from an interrupt 157 * kx- only accessed by curthread and by debugger 158 * l - the attaching proc or attaching proc parent 159 * n - not locked, lazy 160 * o - ktrace lock 161 * q - td_contested lock 162 * r - p_peers lock 163 * s - see sleepq_switch(), sleeping_on_old_rtc(), and sleep(9) 164 * t - thread lock 165 * u - process stat lock 166 * w - process timer lock 167 * x - created at fork, only changes during single threading in exec 168 * y - created at first aio, doesn't change until exit or exec at which 169 * point we are single-threaded and only curthread changes it 170 * 171 * If the locking key specifies two identifiers (for example, p_pptr) then 172 * either lock is sufficient for read access, but both locks must be held 173 * for write access. 174 */ 175struct cpuset; 176struct filecaps; 177struct filemon; 178struct kaioinfo; 179struct kaudit_record; 180struct kcov_info; 181struct kdtrace_proc; 182struct kdtrace_thread; 183struct kmsan_td; 184struct kq_timer_cb_data; 185struct mqueue_notifier; 186struct p_sched; 187struct proc; 188struct procdesc; 189struct racct; 190struct sbuf; 191struct sleepqueue; 192struct socket; 193struct td_sched; 194struct thread; 195struct trapframe; 196struct turnstile; 197struct vm_map; 198struct vm_map_entry; 199struct epoch_tracker; 200 201struct syscall_args { 202 u_int code; 203 u_int original_code; 204 struct sysent *callp; 205 register_t args[8]; 206}; 207 208/* 209 * XXX: Does this belong in resource.h or resourcevar.h instead? 210 * Resource usage extension. The times in rusage structs in the kernel are 211 * never up to date. The actual times are kept as runtimes and tick counts 212 * (with control info in the "previous" times), and are converted when 213 * userland asks for rusage info. Backwards compatibility prevents putting 214 * this directly in the user-visible rusage struct. 215 * 216 * Locking for p_rux: (cu) means (u) for p_rux and (c) for p_crux. 217 * Locking for td_rux: (t) for all fields. 218 */ 219struct rusage_ext { 220 uint64_t rux_runtime; /* (cu) Real time. */ 221 uint64_t rux_uticks; /* (cu) Statclock hits in user mode. */ 222 uint64_t rux_sticks; /* (cu) Statclock hits in sys mode. */ 223 uint64_t rux_iticks; /* (cu) Statclock hits in intr mode. */ 224 uint64_t rux_uu; /* (c) Previous user time in usec. */ 225 uint64_t rux_su; /* (c) Previous sys time in usec. */ 226 uint64_t rux_tu; /* (c) Previous total time in usec. */ 227}; 228 229/* 230 * Kernel runnable context (thread). 231 * This is what is put to sleep and reactivated. 232 * Thread context. Processes may have multiple threads. 233 */ 234struct thread { 235 struct mtx *volatile td_lock; /* replaces sched lock */ 236 struct proc *td_proc; /* (*) Associated process. */ 237 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */ 238 TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */ 239 union { 240 TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */ 241 struct thread *td_zombie; /* Zombie list linkage */ 242 }; 243 TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */ 244 LIST_ENTRY(thread) td_hash; /* (d) Hash chain. */ 245 struct cpuset *td_cpuset; /* (t) CPU affinity mask. */ 246 struct domainset_ref td_domain; /* (a) NUMA policy */ 247 struct seltd *td_sel; /* Select queue/channel. */ 248 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */ 249 struct turnstile *td_turnstile; /* (k) Associated turnstile. */ 250 struct rl_q_entry *td_rlqe; /* (k) Associated range lock entry. */ 251 struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */ 252 lwpid_t td_tid; /* (b) Thread ID. */ 253 sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */ 254#define td_siglist td_sigqueue.sq_signals 255 u_char td_lend_user_pri; /* (t) Lend user pri. */ 256 u_char td_allocdomain; /* (b) NUMA domain backing this struct thread. */ 257 u_char td_base_ithread_pri; /* (t) Base ithread pri */ 258 struct kmsan_td *td_kmsan; /* (k) KMSAN state */ 259 260/* Cleared during fork1(), thread_create(), or kthread_add(). */ 261#define td_startzero td_flags 262 int td_flags; /* (t) TDF_* flags. */ 263 int td_ast; /* (t) TDA_* indicators */ 264 int td_inhibitors; /* (t) Why can not run. */ 265 int td_pflags; /* (k) Private thread (TDP_*) flags. */ 266 int td_pflags2; /* (k) Private thread (TDP2_*) flags. */ 267 int td_dupfd; /* (k) Ret value from fdopen. XXX */ 268 int td_sqqueue; /* (t) Sleepqueue queue blocked on. */ 269 const void *td_wchan; /* (t) Sleep address. */ 270 const char *td_wmesg; /* (t) Reason for sleep. */ 271 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */ 272 u_char td_tsqueue; /* (t) Turnstile queue blocked on. */ 273 u_char _td_pad0[2]; /* Available. */ 274 int td_locks; /* (k) Debug: count of non-spin locks */ 275 int td_rw_rlocks; /* (k) Count of rwlock read locks. */ 276 int td_sx_slocks; /* (k) Count of sx shared locks. */ 277 int td_lk_slocks; /* (k) Count of lockmgr shared locks. */ 278 struct lock_object *td_wantedlock; /* (k) Lock we are contending on */ 279 struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */ 280 const char *td_lockname; /* (t) Name of lock blocked on. */ 281 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */ 282 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */ 283 int td_intr_nesting_level; /* (k) Interrupt recursion. */ 284 int td_pinned; /* (k) Temporary cpu pin count. */ 285 struct ucred *td_realucred; /* (k) Reference to credentials. */ 286 struct ucred *td_ucred; /* (k) Used credentials, temporarily switchable. */ 287 struct plimit *td_limit; /* (k) Resource limits. */ 288 int td_slptick; /* (t) Time at sleep. */ 289 int td_blktick; /* (t) Time spent blocked. */ 290 int td_swvoltick; /* (t) Time at last SW_VOL switch. */ 291 int td_swinvoltick; /* (t) Time at last SW_INVOL switch. */ 292 u_int td_cow; /* (*) Number of copy-on-write faults */ 293 struct rusage td_ru; /* (t) rusage information. */ 294 struct rusage_ext td_rux; /* (t) Internal rusage information. */ 295 uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */ 296 uint64_t td_runtime; /* (t) How many cpu ticks we've run. */ 297 u_int td_pticks; /* (t) Statclock hits for profiling */ 298 u_int td_sticks; /* (t) Statclock hits in system mode. */ 299 u_int td_iticks; /* (t) Statclock hits in intr mode. */ 300 u_int td_uticks; /* (t) Statclock hits in user mode. */ 301 int td_intrval; /* (t) Return value for sleepq. */ 302 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */ 303 volatile u_int td_generation; /* (k) For detection of preemption */ 304 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */ 305 int td_xsig; /* (c) Signal for ptrace */ 306 u_long td_profil_addr; /* (k) Temporary addr until AST. */ 307 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */ 308 char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */ 309 struct file *td_fpop; /* (k) file referencing cdev under op */ 310 int td_dbgflags; /* (c) Userland debugger flags */ 311 siginfo_t td_si; /* (c) For debugger or core file */ 312 int td_ng_outbound; /* (k) Thread entered ng from above. */ 313 struct osd td_osd; /* (k) Object specific data. */ 314 struct vm_map_entry *td_map_def_user; /* (k) Deferred entries. */ 315 pid_t td_dbg_forked; /* (c) Child pid for debugger. */ 316 u_int td_no_sleeping; /* (k) Sleeping disabled count. */ 317 struct vnode *td_vp_reserved;/* (k) Preallocated vnode. */ 318 void *td_su; /* (k) FFS SU private */ 319 sbintime_t td_sleeptimo; /* (t) Sleep timeout. */ 320 int td_rtcgen; /* (s) rtc_generation of abs. sleep */ 321 int td_errno; /* (k) Error from last syscall. */ 322 size_t td_vslock_sz; /* (k) amount of vslock-ed space */ 323 struct kcov_info *td_kcov_info; /* (*) Kernel code coverage data */ 324 long td_ucredref; /* (k) references on td_realucred */ 325#define td_endzero td_sigmask 326 327/* Copied during fork1(), thread_create(), or kthread_add(). */ 328#define td_startcopy td_endzero 329 sigset_t td_sigmask; /* (c) Current signal mask. */ 330 u_char td_rqindex; /* (t) Run queue index. */ 331 u_char td_base_pri; /* (t) Thread base kernel priority. */ 332 u_char td_priority; /* (t) Thread active priority. */ 333 u_char td_pri_class; /* (t) Scheduling class. */ 334 u_char td_user_pri; /* (t) User pri from estcpu and nice. */ 335 u_char td_base_user_pri; /* (t) Base user pri */ 336 uintptr_t td_rb_list; /* (k) Robust list head. */ 337 uintptr_t td_rbp_list; /* (k) Robust priv list head. */ 338 uintptr_t td_rb_inact; /* (k) Current in-action mutex loc. */ 339 struct syscall_args td_sa; /* (kx) Syscall parameters. Copied on 340 fork for child tracing. */ 341 void *td_sigblock_ptr; /* (k) uptr for fast sigblock. */ 342 uint32_t td_sigblock_val; /* (k) fast sigblock value read at 343 td_sigblock_ptr on kern entry */ 344#define td_endcopy td_pcb 345 346/* 347 * Fields that must be manually set in fork1(), thread_create(), kthread_add(), 348 * or already have been set in the allocator, constructor, etc. 349 */ 350 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */ 351 enum td_states { 352 TDS_INACTIVE = 0x0, 353 TDS_INHIBITED, 354 TDS_CAN_RUN, 355 TDS_RUNQ, 356 TDS_RUNNING 357 } td_state; /* (t) thread state */ 358 /* Note: td_state must be accessed using TD_{GET,SET}_STATE(). */ 359 union { 360 syscallarg_t tdu_retval[2]; 361 off_t tdu_off; 362 } td_uretoff; /* (k) Syscall aux returns. */ 363#define td_retval td_uretoff.tdu_retval 364 u_int td_cowgen; /* (k) Generation of COW pointers. */ 365 /* LP64 hole */ 366 struct callout td_slpcallout; /* (h) Callout for sleep. */ 367 struct trapframe *td_frame; /* (k) */ 368 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */ 369 u_short td_kstack_pages; /* (a) Size of the kstack. */ 370 u_short td_kstack_domain; /* (a) Domain backing kstack KVA. */ 371 volatile u_int td_critnest; /* (k*) Critical section nest level. */ 372 struct mdthread td_md; /* (k) Any machine-dependent fields. */ 373 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */ 374 struct lpohead td_lprof[2]; /* (a) lock profiling objects. */ 375 struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */ 376 struct vnet *td_vnet; /* (k) Effective vnet. */ 377 const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */ 378 struct trapframe *td_intr_frame;/* (k) Frame of the current irq */ 379 struct proc *td_rfppwait_p; /* (k) The vforked child */ 380 struct vm_page **td_ma; /* (k) uio pages held */ 381 int td_ma_cnt; /* (k) size of *td_ma */ 382 /* LP64 hole */ 383 void *td_emuldata; /* Emulator state data */ 384 int td_lastcpu; /* (t) Last cpu we were on. */ 385 int td_oncpu; /* (t) Which cpu we are on. */ 386 void *td_lkpi_task; /* LinuxKPI task struct pointer */ 387 int td_pmcpend; 388 void *td_remotereq; /* (c) dbg remote request. */ 389 off_t td_ktr_io_lim; /* (k) limit for ktrace file size */ 390#ifdef EPOCH_TRACE 391 SLIST_HEAD(, epoch_tracker) td_epochs; 392#endif 393}; 394 395struct thread0_storage { 396 struct thread t0st_thread; 397 uint64_t t0st_sched[10]; 398}; 399 400struct mtx *thread_lock_block(struct thread *); 401void thread_lock_block_wait(struct thread *); 402void thread_lock_set(struct thread *, struct mtx *); 403void thread_lock_unblock(struct thread *, struct mtx *); 404#define THREAD_LOCK_ASSERT(td, type) \ 405 mtx_assert((td)->td_lock, (type)) 406 407#define THREAD_LOCK_BLOCKED_ASSERT(td, type) \ 408do { \ 409 struct mtx *__m = (td)->td_lock; \ 410 if (__m != &blocked_lock) \ 411 mtx_assert(__m, (type)); \ 412} while (0) 413 414#ifdef INVARIANTS 415#define THREAD_LOCKPTR_ASSERT(td, lock) \ 416do { \ 417 struct mtx *__m; \ 418 __m = (td)->td_lock; \ 419 KASSERT(__m == (lock), \ 420 ("Thread %p lock %p does not match %p", td, __m, (lock))); \ 421} while (0) 422 423#define THREAD_LOCKPTR_BLOCKED_ASSERT(td, lock) \ 424do { \ 425 struct mtx *__m; \ 426 __m = (td)->td_lock; \ 427 KASSERT(__m == (lock) || __m == &blocked_lock, \ 428 ("Thread %p lock %p does not match %p", td, __m, (lock))); \ 429} while (0) 430 431#define TD_LOCKS_INC(td) ((td)->td_locks++) 432#define TD_LOCKS_DEC(td) do { \ 433 KASSERT(SCHEDULER_STOPPED() || (td)->td_locks > 0, \ 434 ("Thread %p owns no locks", (td))); \ 435 (td)->td_locks--; \ 436} while (0) 437#else 438#define THREAD_LOCKPTR_ASSERT(td, lock) 439#define THREAD_LOCKPTR_BLOCKED_ASSERT(td, lock) 440 441#define TD_LOCKS_INC(td) 442#define TD_LOCKS_DEC(td) 443#endif 444 445/* 446 * Flags kept in td_flags: 447 * To change these you MUST have the scheduler lock. 448 */ 449#define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */ 450#define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */ 451#define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */ 452#define TDF_SINTR 0x00000008 /* Sleep is interruptible. */ 453#define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */ 454#define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */ 455#define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */ 456#define TDF_SIGWAIT 0x00000080 /* Ignore ignored signals */ 457#define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */ 458#define TDF_ALLPROCSUSP 0x00000200 /* suspended by SINGLE_ALLPROC */ 459#define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */ 460#define TDF_UNUSED1 0x00000800 /* Available */ 461#define TDF_UNUSED2 0x00001000 /* Available */ 462#define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */ 463#define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */ 464#define TDF_UNUSED3 0x00008000 /* Available */ 465#define TDF_UNUSED4 0x00010000 /* Available */ 466#define TDF_UNUSED5 0x00020000 /* Available */ 467#define TDF_NOLOAD 0x00040000 /* Ignore during load avg calculations. */ 468#define TDF_SERESTART 0x00080000 /* ERESTART on stop attempts. */ 469#define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */ 470#define TDF_SEINTR 0x00200000 /* EINTR on stop attempts. */ 471#define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */ 472#define TDF_UNUSED6 0x00800000 /* Available */ 473#define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */ 474#define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */ 475#define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */ 476#define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */ 477#define TDF_UNUSED7 0x10000000 /* Available */ 478#define TDF_UNUSED8 0x20000000 /* Available */ 479#define TDF_UNUSED9 0x40000000 /* Available */ 480#define TDF_UNUSED10 0x80000000 /* Available */ 481 482enum { 483 TDA_AST = 0, /* Special: call all non-flagged AST handlers */ 484 TDA_OWEUPC, 485 TDA_HWPMC, 486 TDA_VFORK, 487 TDA_ALRM, 488 TDA_PROF, 489 TDA_MAC, 490 TDA_SCHED, 491 TDA_UFS, 492 TDA_GEOM, 493 TDA_KQUEUE, 494 TDA_RACCT, 495 TDA_MOD1, /* For third party use, before signals are */ 496 TAD_MOD2, /* processed .. */ 497 TDA_SIG, 498 TDA_KTRACE, 499 TDA_SUSPEND, 500 TDA_SIGSUSPEND, 501 TDA_MOD3, /* .. and after */ 502 TAD_MOD4, 503 TDA_MAX, 504}; 505#define TDAI(tda) (1U << (tda)) 506#define td_ast_pending(td, tda) ((td->td_ast & TDAI(tda)) != 0) 507 508/* Userland debug flags */ 509#define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */ 510#define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */ 511#define TDB_USERWR 0x00000004 /* Debugger modified memory or registers */ 512#define TDB_SCE 0x00000008 /* Thread performs syscall enter */ 513#define TDB_SCX 0x00000010 /* Thread performs syscall exit */ 514#define TDB_EXEC 0x00000020 /* TDB_SCX from exec(2) family */ 515#define TDB_FORK 0x00000040 /* TDB_SCX from fork(2) that created new 516 process */ 517#define TDB_STOPATFORK 0x00000080 /* Stop at the return from fork (child 518 only) */ 519#define TDB_CHILD 0x00000100 /* New child indicator for ptrace() */ 520#define TDB_BORN 0x00000200 /* New LWP indicator for ptrace() */ 521#define TDB_EXIT 0x00000400 /* Exiting LWP indicator for ptrace() */ 522#define TDB_VFORK 0x00000800 /* vfork indicator for ptrace() */ 523#define TDB_FSTP 0x00001000 /* The thread is PT_ATTACH leader */ 524#define TDB_STEP 0x00002000 /* (x86) PSL_T set for PT_STEP */ 525#define TDB_SSWITCH 0x00004000 /* Suspended in ptracestop */ 526#define TDB_BOUNDARY 0x00008000 /* ptracestop() at boundary */ 527#define TDB_COREDUMPREQ 0x00010000 /* Coredump request */ 528#define TDB_SCREMOTEREQ 0x00020000 /* Remote syscall request */ 529 530/* 531 * "Private" flags kept in td_pflags: 532 * These are only written by curthread and thus need no locking. 533 */ 534#define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */ 535#define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */ 536#define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */ 537#define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */ 538#define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */ 539#define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */ 540#define TDP_DEADLKTREAT 0x00000040 /* Lock acquisition - deadlock treatment. */ 541#define TDP_NOFAULTING 0x00000080 /* Do not handle page faults. */ 542#define TDP_SIGFASTBLOCK 0x00000100 /* Fast sigblock active */ 543#define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */ 544#define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */ 545#define TDP_SYNCIO 0x00000800 /* Local override, disable async i/o. */ 546#define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */ 547#define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */ 548#define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */ 549#define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */ 550#define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */ 551#define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */ 552#define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */ 553#define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */ 554#define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */ 555#define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */ 556#define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */ 557#define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */ 558#define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */ 559#define TDP_RFPPWAIT 0x02000000 /* Handle RFPPWAIT on syscall exit */ 560#define TDP_RESETSPUR 0x04000000 /* Reset spurious page fault history. */ 561#define TDP_NERRNO 0x08000000 /* Last errno is already in td_errno */ 562#define TDP_UIOHELD 0x10000000 /* Current uio has pages held in td_ma */ 563#define TDP_INTCPCALLOUT 0x20000000 /* used by netinet/tcp_timer.c */ 564#define TDP_EXECVMSPC 0x40000000 /* Execve destroyed old vmspace */ 565#define TDP_SIGFASTPENDING 0x80000000 /* Pending signal due to sigfastblock */ 566 567#define TDP2_SBPAGES 0x00000001 /* Owns sbusy on some pages */ 568#define TDP2_COMPAT32RB 0x00000002 /* compat32 ABI for robust lists */ 569#define TDP2_ACCT 0x00000004 /* Doing accounting */ 570 571/* 572 * Reasons that the current thread can not be run yet. 573 * More than one may apply. 574 */ 575#define TDI_SUSPENDED 0x0001 /* On suspension queue. */ 576#define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */ 577#define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */ 578#define TDI_LOCK 0x0008 /* Stopped on a lock. */ 579#define TDI_IWAIT 0x0010 /* Awaiting interrupt. */ 580 581#define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING) 582#define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL) 583#define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED) 584#define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED) 585#define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK) 586#define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT) 587#ifdef _KERNEL 588#define TD_GET_STATE(td) atomic_load_int(&(td)->td_state) 589#else 590#define TD_GET_STATE(td) ((td)->td_state) 591#endif 592#define TD_IS_RUNNING(td) (TD_GET_STATE(td) == TDS_RUNNING) 593#define TD_ON_RUNQ(td) (TD_GET_STATE(td) == TDS_RUNQ) 594#define TD_CAN_RUN(td) (TD_GET_STATE(td) == TDS_CAN_RUN) 595#define TD_IS_INHIBITED(td) (TD_GET_STATE(td) == TDS_INHIBITED) 596#define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED) 597#define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD) 598 599#define TD_CAN_ABORT(td) (TD_ON_SLEEPQ((td)) && \ 600 ((td)->td_flags & TDF_SINTR) != 0) 601 602#define KTDSTATE(td) \ 603 (((td)->td_inhibitors & TDI_SLEEPING) != 0 ? "sleep" : \ 604 ((td)->td_inhibitors & TDI_SUSPENDED) != 0 ? "suspended" : \ 605 ((td)->td_inhibitors & TDI_SWAPPED) != 0 ? "swapped" : \ 606 ((td)->td_inhibitors & TDI_LOCK) != 0 ? "blocked" : \ 607 ((td)->td_inhibitors & TDI_IWAIT) != 0 ? "iwait" : "yielding") 608 609#define TD_SET_INHIB(td, inhib) do { \ 610 TD_SET_STATE(td, TDS_INHIBITED); \ 611 (td)->td_inhibitors |= (inhib); \ 612} while (0) 613 614#define TD_CLR_INHIB(td, inhib) do { \ 615 if (((td)->td_inhibitors & (inhib)) && \ 616 (((td)->td_inhibitors &= ~(inhib)) == 0)) \ 617 TD_SET_STATE(td, TDS_CAN_RUN); \ 618} while (0) 619 620#define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING) 621#define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED) 622#define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK) 623#define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED) 624#define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT) 625#define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING) 626 627#define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING) 628#define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED) 629#define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK) 630#define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED) 631#define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT) 632 633#ifdef _KERNEL 634#define TD_SET_STATE(td, state) atomic_store_int(&(td)->td_state, state) 635#else 636#define TD_SET_STATE(td, state) (td)->td_state = state 637#endif 638#define TD_SET_RUNNING(td) TD_SET_STATE(td, TDS_RUNNING) 639#define TD_SET_RUNQ(td) TD_SET_STATE(td, TDS_RUNQ) 640#define TD_SET_CAN_RUN(td) TD_SET_STATE(td, TDS_CAN_RUN) 641 642 643#define TD_SBDRY_INTR(td) \ 644 (((td)->td_flags & (TDF_SEINTR | TDF_SERESTART)) != 0) 645#define TD_SBDRY_ERRNO(td) \ 646 (((td)->td_flags & TDF_SEINTR) != 0 ? EINTR : ERESTART) 647 648/* 649 * Process structure. 650 */ 651struct proc { 652 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */ 653 TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */ 654 struct mtx p_slock; /* process spin lock */ 655 struct ucred *p_ucred; /* (c) Process owner's identity. */ 656 struct filedesc *p_fd; /* (b) Open files. */ 657 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */ 658 struct pwddesc *p_pd; /* (b) Cwd, chroot, jail, umask */ 659 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */ 660 struct plimit *p_limit; /* (c) Resource limits. */ 661 struct callout p_limco; /* (c) Limit callout handle */ 662 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */ 663 664 int p_flag; /* (c) P_* flags. */ 665 int p_flag2; /* (c) P2_* flags. */ 666 enum p_states { 667 PRS_NEW = 0, /* In creation */ 668 PRS_NORMAL, /* threads can be run. */ 669 PRS_ZOMBIE 670 } p_state; /* (j/c) Process status. */ 671 pid_t p_pid; /* (b) Process identifier. */ 672 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */ 673 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */ 674 struct proc *p_pptr; /* (c + e) Pointer to parent process. */ 675 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */ 676 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */ 677 struct proc *p_reaper; /* (e) My reaper. */ 678 LIST_HEAD(, proc) p_reaplist; /* (e) List of my descendants 679 (if I am reaper). */ 680 LIST_ENTRY(proc) p_reapsibling; /* (e) List of siblings - descendants of 681 the same reaper. */ 682 struct mtx p_mtx; /* (n) Lock for this struct. */ 683 struct mtx p_statmtx; /* Lock for the stats */ 684 struct mtx p_itimmtx; /* Lock for the virt/prof timers */ 685 struct mtx p_profmtx; /* Lock for the profiling */ 686 struct ksiginfo *p_ksi; /* Locked by parent proc lock */ 687 sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */ 688#define p_siglist p_sigqueue.sq_signals 689 pid_t p_oppid; /* (c + e) Real parent pid. */ 690 691/* The following fields are all zeroed upon creation in fork. */ 692#define p_startzero p_vmspace 693 struct vmspace *p_vmspace; /* (b) Address space. */ 694 u_int p_swtick; /* (c) Tick when swapped in or out. */ 695 u_int p_cowgen; /* (c) Generation of COW pointers. */ 696 struct itimerval p_realtimer; /* (c) Alarm timer. */ 697 struct rusage p_ru; /* (a) Exit information. */ 698 struct rusage_ext p_rux; /* (cu) Internal resource usage. */ 699 struct rusage_ext p_crux; /* (c) Internal child resource usage. */ 700 int p_profthreads; /* (c) Num threads in addupc_task. */ 701 volatile int p_exitthreads; /* (j) Number of threads exiting */ 702 int p_traceflag; /* (o) Kernel trace points. */ 703 struct ktr_io_params *p_ktrioparms; /* (c + o) Params for ktrace. */ 704 struct vnode *p_textvp; /* (b) Vnode of executable. */ 705 struct vnode *p_textdvp; /* (b) Dir containing textvp. */ 706 char *p_binname; /* (b) Binary hardlink name. */ 707 u_int p_lock; /* (c) Proclock (prevent swap) count. */ 708 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */ 709 int p_sigparent; /* (c) Signal to parent on exit. */ 710 int p_sig; /* (n) For core dump/debugger XXX. */ 711 u_int p_ptevents; /* (c + e) ptrace() event mask. */ 712 struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */ 713 struct thread *p_singlethread;/* (c + j) If single threading this is it */ 714 int p_suspcount; /* (j) Num threads in suspended mode. */ 715 struct thread *p_xthread; /* (c) Trap thread */ 716 int p_boundary_count;/* (j) Num threads at user boundary */ 717 int p_pendingcnt; /* how many signals are pending */ 718 struct itimers *p_itimers; /* (c) POSIX interval timers. */ 719 struct procdesc *p_procdesc; /* (e) Process descriptor, if any. */ 720 u_int p_treeflag; /* (e) P_TREE flags */ 721 int p_pendingexits; /* (c) Count of pending thread exits. */ 722 struct filemon *p_filemon; /* (c) filemon-specific data. */ 723 int p_pdeathsig; /* (c) Signal from parent on exit. */ 724/* End area that is zeroed on creation. */ 725#define p_endzero p_magic 726 727/* The following fields are all copied upon creation in fork. */ 728#define p_startcopy p_endzero 729 u_int p_magic; /* (b) Magic number. */ 730 int p_osrel; /* (x) osreldate for the 731 binary (from ELF note, if any) */ 732 uint32_t p_fctl0; /* (x) ABI feature control, ELF note */ 733 char p_comm[MAXCOMLEN + 1]; /* (x) Process name. */ 734 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */ 735 struct pargs *p_args; /* (c) Process arguments. */ 736 rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */ 737 signed char p_nice; /* (c) Process "nice" value. */ 738 int p_fibnum; /* in this routing domain XXX MRT */ 739 pid_t p_reapsubtree; /* (e) Pid of the direct child of the 740 reaper which spawned 741 our subtree. */ 742 uint64_t p_elf_flags; /* (x) ELF flags */ 743 void *p_elf_brandinfo; /* (x) Elf_Brandinfo, NULL for 744 non ELF binaries. */ 745 sbintime_t p_umtx_min_timeout; 746/* End area that is copied on creation. */ 747#define p_endcopy p_xexit 748 749 u_int p_xexit; /* (c) Exit code. */ 750 u_int p_xsig; /* (c) Stop/kill sig. */ 751 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */ 752 struct knlist *p_klist; /* (c) Knotes attached to this proc. */ 753 int p_numthreads; /* (c) Number of threads. */ 754 struct mdproc p_md; /* Any machine-dependent fields. */ 755 struct callout p_itcallout; /* (h + c) Interval timer callout. */ 756 u_short p_acflag; /* (c) Accounting flags. */ 757 struct proc *p_peers; /* (r) */ 758 struct proc *p_leader; /* (b) */ 759 void *p_emuldata; /* (c) Emulator state data. */ 760 struct label *p_label; /* (*) Proc (not subject) MAC label. */ 761 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */ 762 LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/ 763 struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */ 764 struct cv p_pwait; /* (*) wait cv for exit/exec. */ 765 uint64_t p_prev_runtime; /* (c) Resource usage accounting. */ 766 struct racct *p_racct; /* (b) Resource accounting. */ 767 int p_throttled; /* (c) Flag for racct pcpu throttling */ 768 /* 769 * An orphan is the child that has been re-parented to the 770 * debugger as a result of attaching to it. Need to keep 771 * track of them for parent to be able to collect the exit 772 * status of what used to be children. 773 */ 774 LIST_ENTRY(proc) p_orphan; /* (e) List of orphan processes. */ 775 LIST_HEAD(, proc) p_orphans; /* (e) Pointer to list of orphans. */ 776 777 TAILQ_HEAD(, kq_timer_cb_data) p_kqtim_stop; /* (c) */ 778 LIST_ENTRY(proc) p_jaillist; /* (d) Jail process linkage. */ 779}; 780 781#define p_session p_pgrp->pg_session 782#define p_pgid p_pgrp->pg_id 783 784#define NOCPU (-1) /* For when we aren't on a CPU. */ 785#define NOCPU_OLD (255) 786#define MAXCPU_OLD (254) 787 788#define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock) 789#define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock) 790#define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type)) 791 792#define PROC_STATLOCK(p) mtx_lock_spin(&(p)->p_statmtx) 793#define PROC_STATUNLOCK(p) mtx_unlock_spin(&(p)->p_statmtx) 794#define PROC_STATLOCK_ASSERT(p, type) mtx_assert(&(p)->p_statmtx, (type)) 795 796#define PROC_ITIMLOCK(p) mtx_lock_spin(&(p)->p_itimmtx) 797#define PROC_ITIMUNLOCK(p) mtx_unlock_spin(&(p)->p_itimmtx) 798#define PROC_ITIMLOCK_ASSERT(p, type) mtx_assert(&(p)->p_itimmtx, (type)) 799 800#define PROC_PROFLOCK(p) mtx_lock_spin(&(p)->p_profmtx) 801#define PROC_PROFUNLOCK(p) mtx_unlock_spin(&(p)->p_profmtx) 802#define PROC_PROFLOCK_ASSERT(p, type) mtx_assert(&(p)->p_profmtx, (type)) 803 804/* These flags are kept in p_flag. */ 805#define P_ADVLOCK 0x00000001 /* Process may hold a POSIX advisory 806 lock. */ 807#define P_CONTROLT 0x00000002 /* Has a controlling terminal. */ 808#define P_KPROC 0x00000004 /* Kernel process. */ 809#define P_UNUSED3 0x00000008 /* --available-- */ 810#define P_PPWAIT 0x00000010 /* Parent is waiting for child to 811 exec/exit. */ 812#define P_PROFIL 0x00000020 /* Has started profiling. */ 813#define P_STOPPROF 0x00000040 /* Has thread requesting to stop 814 profiling. */ 815#define P_HADTHREADS 0x00000080 /* Has had threads (no cleanup 816 shortcuts) */ 817#define P_SUGID 0x00000100 /* Had set id privileges since last 818 exec. */ 819#define P_SYSTEM 0x00000200 /* System proc: no sigs, stats or 820 swapping. */ 821#define P_SINGLE_EXIT 0x00000400 /* Threads suspending should exit, 822 not wait. */ 823#define P_TRACED 0x00000800 /* Debugged process being traced. */ 824#define P_WAITED 0x00001000 /* Someone is waiting for us. */ 825#define P_WEXIT 0x00002000 /* Working on exiting. */ 826#define P_EXEC 0x00004000 /* Process called exec. */ 827#define P_WKILLED 0x00008000 /* Killed, go to kernel/user boundary 828 ASAP. */ 829#define P_CONTINUED 0x00010000 /* Proc has continued from a stopped 830 state. */ 831#define P_STOPPED_SIG 0x00020000 /* Stopped due to SIGSTOP/SIGTSTP. */ 832#define P_STOPPED_TRACE 0x00040000 /* Stopped because of tracing. */ 833#define P_STOPPED_SINGLE 0x00080000 /* Only 1 thread can continue (not to 834 user). */ 835#define P_PROTECTED 0x00100000 /* Do not kill on memory overcommit. */ 836#define P_SIGEVENT 0x00200000 /* Process pending signals changed. */ 837#define P_SINGLE_BOUNDARY 0x00400000 /* Threads should suspend at user 838 boundary. */ 839#define P_HWPMC 0x00800000 /* Process is using HWPMCs */ 840#define P_JAILED 0x01000000 /* Process is in jail. */ 841#define P_TOTAL_STOP 0x02000000 /* Stopped in stop_all_proc. */ 842#define P_INEXEC 0x04000000 /* Process is in execve(). */ 843#define P_STATCHILD 0x08000000 /* Child process stopped or exited. */ 844#define P_INMEM 0x10000000 /* Loaded into memory. */ 845#define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */ 846#define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */ 847#define P_PPTRACE 0x80000000 /* PT_TRACEME by vforked child. */ 848 849#define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE) 850#define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED) 851#define P_KILLED(p) ((p)->p_flag & P_WKILLED) 852 853/* These flags are kept in p_flag2. */ 854#define P2_INHERIT_PROTECTED 0x00000001 /* New children get 855 P_PROTECTED. */ 856#define P2_NOTRACE 0x00000002 /* No ptrace(2) attach or 857 coredumps. */ 858#define P2_NOTRACE_EXEC 0x00000004 /* Keep P2_NOPTRACE on 859 exec(2). */ 860#define P2_AST_SU 0x00000008 /* Handles SU ast for 861 kthreads. */ 862#define P2_PTRACE_FSTP 0x00000010 /* SIGSTOP from PT_ATTACH not 863 yet handled. */ 864#define P2_TRAPCAP 0x00000020 /* SIGTRAP on ENOTCAPABLE */ 865#define P2_ASLR_ENABLE 0x00000040 /* Force enable ASLR. */ 866#define P2_ASLR_DISABLE 0x00000080 /* Force disable ASLR. */ 867#define P2_ASLR_IGNSTART 0x00000100 /* Enable ASLR to consume sbrk 868 area. */ 869#define P2_PROTMAX_ENABLE 0x00000200 /* Force enable implied 870 PROT_MAX. */ 871#define P2_PROTMAX_DISABLE 0x00000400 /* Force disable implied 872 PROT_MAX. */ 873#define P2_STKGAP_DISABLE 0x00000800 /* Disable stack gap for 874 MAP_STACK */ 875#define P2_STKGAP_DISABLE_EXEC 0x00001000 /* Stack gap disabled 876 after exec */ 877#define P2_ITSTOPPED 0x00002000 878#define P2_PTRACEREQ 0x00004000 /* Active ptrace req */ 879#define P2_NO_NEW_PRIVS 0x00008000 /* Ignore setuid */ 880#define P2_WXORX_DISABLE 0x00010000 /* WX mappings enabled */ 881#define P2_WXORX_ENABLE_EXEC 0x00020000 /* WXORX enabled after exec */ 882#define P2_WEXIT 0x00040000 /* exit just started, no 883 external thread_single() is 884 permitted */ 885#define P2_REAPKILLED 0x00080000 886#define P2_MEMBAR_PRIVE 0x00100000 /* membar private expedited 887 registered */ 888#define P2_MEMBAR_PRIVE_SYNCORE 0x00200000 /* membar private expedited 889 sync core registered */ 890#define P2_MEMBAR_GLOBE 0x00400000 /* membar global expedited 891 registered */ 892 893/* Flags protected by proctree_lock, kept in p_treeflags. */ 894#define P_TREE_ORPHANED 0x00000001 /* Reparented, on orphan list */ 895#define P_TREE_FIRST_ORPHAN 0x00000002 /* First element of orphan 896 list */ 897#define P_TREE_REAPER 0x00000004 /* Reaper of subtree */ 898#define P_TREE_GRPEXITED 0x00000008 /* exit1() done with job ctl */ 899 900/* 901 * These were process status values (p_stat), now they are only used in 902 * legacy conversion code. 903 */ 904#define SIDL 1 /* Process being created by fork. */ 905#define SRUN 2 /* Currently runnable. */ 906#define SSLEEP 3 /* Sleeping on an address. */ 907#define SSTOP 4 /* Process debugging or suspension. */ 908#define SZOMB 5 /* Awaiting collection by parent. */ 909#define SWAIT 6 /* Waiting for interrupt. */ 910#define SLOCK 7 /* Blocked on a lock. */ 911 912#define P_MAGIC 0xbeefface 913 914#ifdef _KERNEL 915 916/* Types and flags for mi_switch(9). */ 917#define SW_TYPE_MASK 0xff /* First 8 bits are switch type */ 918#define SWT_OWEPREEMPT 1 /* Switching due to owepreempt. */ 919#define SWT_TURNSTILE 2 /* Turnstile contention. */ 920#define SWT_SLEEPQ 3 /* Sleepq wait. */ 921#define SWT_RELINQUISH 4 /* yield call. */ 922#define SWT_NEEDRESCHED 5 /* NEEDRESCHED was set. */ 923#define SWT_IDLE 6 /* Switching from the idle thread. */ 924#define SWT_IWAIT 7 /* Waiting for interrupts. */ 925#define SWT_SUSPEND 8 /* Thread suspended. */ 926#define SWT_REMOTEPREEMPT 9 /* Remote processor preempted. */ 927#define SWT_REMOTEWAKEIDLE 10 /* Remote processor preempted idle. */ 928#define SWT_BIND 11 /* Thread bound to a new CPU. */ 929#define SWT_COUNT 12 /* Number of switch types. */ 930/* Flags */ 931#define SW_VOL 0x0100 /* Voluntary switch. */ 932#define SW_INVOL 0x0200 /* Involuntary switch. */ 933#define SW_PREEMPT 0x0400 /* The invol switch is a preemption */ 934 935/* How values for thread_single(). */ 936#define SINGLE_NO_EXIT 0 937#define SINGLE_EXIT 1 938#define SINGLE_BOUNDARY 2 939#define SINGLE_ALLPROC 3 940 941#define FOREACH_PROC_IN_SYSTEM(p) \ 942 LIST_FOREACH((p), &allproc, p_list) 943#define FOREACH_THREAD_IN_PROC(p, td) \ 944 TAILQ_FOREACH((td), &(p)->p_threads, td_plist) 945 946#define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads) 947 948/* 949 * We use process IDs <= pid_max <= PID_MAX; PID_MAX + 1 must also fit 950 * in a pid_t, as it is used to represent "no process group". 951 */ 952#define PID_MAX 99999 953#define NO_PID (PID_MAX + 1) 954#define THREAD0_TID NO_PID 955extern pid_t pid_max; 956 957#define SESS_LEADER(p) ((p)->p_session->s_leader == (p)) 958 959/* Lock and unlock a process. */ 960#define PROC_LOCK(p) mtx_lock(&(p)->p_mtx) 961#define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx) 962#define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx) 963#define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx) 964#define PROC_WAIT_UNLOCKED(p) mtx_wait_unlocked(&(p)->p_mtx) 965#define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type)) 966 967/* Lock and unlock a process group. */ 968#define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx) 969#define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx) 970#define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx) 971#define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type)) 972 973#define PGRP_LOCK_PGSIGNAL(pg) do { \ 974 if ((pg) != NULL) \ 975 PGRP_LOCK(pg); \ 976} while (0) 977#define PGRP_UNLOCK_PGSIGNAL(pg) do { \ 978 if ((pg) != NULL) \ 979 PGRP_UNLOCK(pg); \ 980} while (0) 981 982/* Lock and unlock a session. */ 983#define SESS_LOCK(s) mtx_lock(&(s)->s_mtx) 984#define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx) 985#define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx) 986#define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type)) 987 988/* 989 * Non-zero p_lock ensures that: 990 * - exit1() is not performed until p_lock reaches zero; 991 * - the process' threads stack are not swapped out if they are currently 992 * not (P_INMEM). 993 * 994 * PHOLD() asserts that the process (except the current process) is 995 * not exiting, increments p_lock and swaps threads stacks into memory, 996 * if needed. 997 * _PHOLD() is same as PHOLD(), it takes the process locked. 998 * _PHOLD_LITE() also takes the process locked, but comparing with 999 * _PHOLD(), it only guarantees that exit1() is not executed, 1000 * faultin() is not called. 1001 */ 1002#define PHOLD(p) do { \ 1003 PROC_LOCK(p); \ 1004 _PHOLD(p); \ 1005 PROC_UNLOCK(p); \ 1006} while (0) 1007#define _PHOLD(p) do { \ 1008 PROC_LOCK_ASSERT((p), MA_OWNED); \ 1009 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \ 1010 ("PHOLD of exiting process %p", p)); \ 1011 (p)->p_lock++; \ 1012 if (((p)->p_flag & P_INMEM) == 0) \ 1013 faultin((p)); \ 1014} while (0) 1015#define _PHOLD_LITE(p) do { \ 1016 PROC_LOCK_ASSERT((p), MA_OWNED); \ 1017 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \ 1018 ("PHOLD of exiting process %p", p)); \ 1019 (p)->p_lock++; \ 1020} while (0) 1021#define PROC_ASSERT_HELD(p) do { \ 1022 KASSERT((p)->p_lock > 0, ("process %p not held", p)); \ 1023} while (0) 1024 1025#define PRELE(p) do { \ 1026 PROC_LOCK((p)); \ 1027 _PRELE((p)); \ 1028 PROC_UNLOCK((p)); \ 1029} while (0) 1030#define _PRELE(p) do { \ 1031 PROC_LOCK_ASSERT((p), MA_OWNED); \ 1032 PROC_ASSERT_HELD(p); \ 1033 (--(p)->p_lock); \ 1034 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \ 1035 wakeup(&(p)->p_lock); \ 1036} while (0) 1037#define PROC_ASSERT_NOT_HELD(p) do { \ 1038 KASSERT((p)->p_lock == 0, ("process %p held", p)); \ 1039} while (0) 1040 1041#define PROC_UPDATE_COW(p) do { \ 1042 struct proc *_p = (p); \ 1043 PROC_LOCK_ASSERT((_p), MA_OWNED); \ 1044 atomic_store_int(&_p->p_cowgen, _p->p_cowgen + 1); \ 1045} while (0) 1046 1047#define PROC_COW_CHANGECOUNT(td, p) ({ \ 1048 struct thread *_td = (td); \ 1049 struct proc *_p = (p); \ 1050 MPASS(_td == curthread); \ 1051 PROC_LOCK_ASSERT(_p, MA_OWNED); \ 1052 _p->p_cowgen - _td->td_cowgen; \ 1053}) 1054 1055/* Check whether a thread is safe to be swapped out. */ 1056#define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP) 1057 1058/* Control whether or not it is safe for curthread to sleep. */ 1059#define THREAD_NO_SLEEPING() do { \ 1060 curthread->td_no_sleeping++; \ 1061 MPASS(curthread->td_no_sleeping > 0); \ 1062} while (0) 1063 1064#define THREAD_SLEEPING_OK() do { \ 1065 MPASS(curthread->td_no_sleeping > 0); \ 1066 curthread->td_no_sleeping--; \ 1067} while (0) 1068 1069#define THREAD_CAN_SLEEP() ((curthread)->td_no_sleeping == 0) 1070 1071#define THREAD_CONTENDS_ON_LOCK(lo) do { \ 1072 MPASS(curthread->td_wantedlock == NULL); \ 1073 curthread->td_wantedlock = lo; \ 1074} while (0) 1075 1076#define THREAD_CONTENTION_DONE(lo) do { \ 1077 MPASS(curthread->td_wantedlock == lo); \ 1078 curthread->td_wantedlock = NULL; \ 1079} while (0) 1080 1081#define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash]) 1082#define PIDHASHLOCK(pid) (&pidhashtbl_lock[((pid) & pidhashlock)]) 1083extern LIST_HEAD(pidhashhead, proc) *pidhashtbl; 1084extern struct sx *pidhashtbl_lock; 1085extern u_long pidhash; 1086extern u_long pidhashlock; 1087 1088#define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash]) 1089extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl; 1090extern u_long pgrphash; 1091 1092extern struct sx allproc_lock; 1093extern int allproc_gen; 1094extern struct sx proctree_lock; 1095extern struct mtx ppeers_lock; 1096extern struct mtx procid_lock; 1097extern struct proc proc0; /* Process slot for swapper. */ 1098extern struct thread0_storage thread0_st; /* Primary thread in proc0. */ 1099#define thread0 (thread0_st.t0st_thread) 1100extern struct vmspace vmspace0; /* VM space for proc0. */ 1101extern int hogticks; /* Limit on kernel cpu hogs. */ 1102extern int lastpid; 1103extern int nprocs, maxproc; /* Current and max number of procs. */ 1104extern int maxprocperuid; /* Max procs per uid. */ 1105extern u_long ps_arg_cache_limit; 1106 1107LIST_HEAD(proclist, proc); 1108TAILQ_HEAD(procqueue, proc); 1109TAILQ_HEAD(threadqueue, thread); 1110extern struct proclist allproc; /* List of all processes. */ 1111extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */ 1112 1113extern struct uma_zone *proc_zone; 1114extern struct uma_zone *pgrp_zone; 1115 1116struct proc *pfind(pid_t); /* Find process by id. */ 1117struct proc *pfind_any(pid_t); /* Find (zombie) process by id. */ 1118struct proc *pfind_any_locked(pid_t pid); /* Find process by id, locked. */ 1119struct pgrp *pgfind(pid_t); /* Find process group by id. */ 1120void pidhash_slockall(void); /* Shared lock all pid hash lists. */ 1121void pidhash_sunlockall(void); /* Shared unlock all pid hash lists. */ 1122 1123struct fork_req { 1124 int fr_flags; 1125 int fr_pages; 1126 int *fr_pidp; 1127 struct proc **fr_procp; 1128 int *fr_pd_fd; 1129 int fr_pd_flags; 1130 struct filecaps *fr_pd_fcaps; 1131 int fr_flags2; 1132#define FR2_DROPSIG_CAUGHT 0x00000001 /* Drop caught non-DFL signals */ 1133#define FR2_SHARE_PATHS 0x00000002 /* Invert sense of RFFDG for paths */ 1134#define FR2_KPROC 0x00000004 /* Create a kernel process */ 1135}; 1136 1137/* 1138 * pget() flags. 1139 */ 1140#define PGET_HOLD 0x00001 /* Hold the process. */ 1141#define PGET_CANSEE 0x00002 /* Check against p_cansee(). */ 1142#define PGET_CANDEBUG 0x00004 /* Check against p_candebug(). */ 1143#define PGET_ISCURRENT 0x00008 /* Check that the found process is current. */ 1144#define PGET_NOTWEXIT 0x00010 /* Check that the process is not in P_WEXIT. */ 1145#define PGET_NOTINEXEC 0x00020 /* Check that the process is not in P_INEXEC. */ 1146#define PGET_NOTID 0x00040 /* Do not assume tid if pid > PID_MAX. */ 1147 1148#define PGET_WANTREAD (PGET_HOLD | PGET_CANDEBUG | PGET_NOTWEXIT) 1149 1150int pget(pid_t pid, int flags, struct proc **pp); 1151 1152/* ast_register() flags */ 1153#define ASTR_ASTF_REQUIRED 0x0001 /* td_ast TDAI(TDA_X) flag set is 1154 required for call */ 1155#define ASTR_TDP 0x0002 /* td_pflags flag set is required */ 1156#define ASTR_KCLEAR 0x0004 /* call me on ast_kclear() */ 1157#define ASTR_UNCOND 0x0008 /* call me always */ 1158 1159void ast(struct trapframe *framep); 1160void ast_kclear(struct thread *td); 1161void ast_register(int ast, int ast_flags, int tdp, 1162 void (*f)(struct thread *td, int asts)); 1163void ast_deregister(int tda); 1164void ast_sched_locked(struct thread *td, int tda); 1165void ast_sched_mask(struct thread *td, int ast); 1166void ast_sched(struct thread *td, int tda); 1167void ast_unsched_locked(struct thread *td, int tda); 1168 1169struct thread *choosethread(void); 1170int cr_bsd_visible(struct ucred *u1, struct ucred *u2); 1171int cr_cansee(struct ucred *u1, struct ucred *u2); 1172int cr_canseesocket(struct ucred *cred, struct socket *so); 1173int cr_cansignal(struct ucred *cred, struct proc *proc, int signum); 1174int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, 1175 struct session *sess); 1176int enterthispgrp(struct proc *p, struct pgrp *pgrp); 1177void faultin(struct proc *p); 1178int fork1(struct thread *, struct fork_req *); 1179void fork_exit(void (*)(void *, struct trapframe *), void *, 1180 struct trapframe *); 1181void fork_return(struct thread *, struct trapframe *); 1182int inferior(struct proc *p); 1183void itimer_proc_continue(struct proc *p); 1184void kqtimer_proc_continue(struct proc *p); 1185void kern_proc_vmmap_resident(struct vm_map *map, struct vm_map_entry *entry, 1186 int *resident_count, bool *super); 1187void kern_yield(int); 1188void kick_proc0(void); 1189void killjobc(void); 1190int leavepgrp(struct proc *p); 1191int maybe_preempt(struct thread *td); 1192void maybe_yield(void); 1193void mi_switch(int flags); 1194int p_candebug(struct thread *td, struct proc *p); 1195int p_cansee(struct thread *td, struct proc *p); 1196int p_cansched(struct thread *td, struct proc *p); 1197int p_cansignal(struct thread *td, struct proc *p, int signum); 1198int p_canwait(struct thread *td, struct proc *p); 1199struct pargs *pargs_alloc(int len); 1200void pargs_drop(struct pargs *pa); 1201void pargs_hold(struct pargs *pa); 1202void proc_add_orphan(struct proc *child, struct proc *parent); 1203int proc_get_binpath(struct proc *p, char *binname, char **fullpath, 1204 char **freepath); 1205int proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb); 1206int proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb); 1207int proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb); 1208void procinit(void); 1209int proc_iterate(int (*cb)(struct proc *, void *), void *cbarg); 1210void proc_linkup0(struct proc *p, struct thread *td); 1211void proc_linkup(struct proc *p, struct thread *td); 1212struct proc *proc_realparent(struct proc *child); 1213void proc_reap(struct thread *td, struct proc *p, int *status, int options); 1214void proc_reparent(struct proc *child, struct proc *newparent, bool set_oppid); 1215void proc_set_p2_wexit(struct proc *p); 1216void proc_set_traced(struct proc *p, bool stop); 1217void proc_wkilled(struct proc *p); 1218struct pstats *pstats_alloc(void); 1219void pstats_fork(struct pstats *src, struct pstats *dst); 1220void pstats_free(struct pstats *ps); 1221void proc_clear_orphan(struct proc *p); 1222void reaper_abandon_children(struct proc *p, bool exiting); 1223int securelevel_ge(struct ucred *cr, int level); 1224int securelevel_gt(struct ucred *cr, int level); 1225void sess_hold(struct session *); 1226void sess_release(struct session *); 1227int setrunnable(struct thread *, int); 1228void setsugid(struct proc *p); 1229bool should_yield(void); 1230int sigonstack(size_t sp); 1231void stopevent(struct proc *, u_int, u_int); 1232struct thread *tdfind(lwpid_t, pid_t); 1233void threadinit(void); 1234void tidhash_add(struct thread *); 1235void tidhash_remove(struct thread *); 1236void cpu_idle(int); 1237int cpu_idle_wakeup(int); 1238extern void (*cpu_idle_hook)(sbintime_t); /* Hook to machdep CPU idler. */ 1239void cpu_switch(struct thread *, struct thread *, struct mtx *); 1240void cpu_sync_core(void); 1241void cpu_throw(struct thread *, struct thread *) __dead2; 1242bool curproc_sigkilled(void); 1243void userret(struct thread *, struct trapframe *); 1244 1245void cpu_exit(struct thread *); 1246void exit1(struct thread *, int, int) __dead2; 1247void cpu_copy_thread(struct thread *td, struct thread *td0); 1248bool cpu_exec_vmspace_reuse(struct proc *p, struct vm_map *map); 1249int cpu_fetch_syscall_args(struct thread *td); 1250void cpu_fork(struct thread *, struct proc *, struct thread *, int); 1251void cpu_fork_kthread_handler(struct thread *, void (*)(void *), void *); 1252int cpu_procctl(struct thread *td, int idtype, id_t id, int com, 1253 void *data); 1254void cpu_set_syscall_retval(struct thread *, int); 1255int cpu_set_upcall(struct thread *, void (*)(void *), void *, 1256 stack_t *); 1257int cpu_set_user_tls(struct thread *, void *tls_base); 1258void cpu_thread_alloc(struct thread *); 1259void cpu_thread_clean(struct thread *); 1260void cpu_thread_exit(struct thread *); 1261void cpu_thread_free(struct thread *); 1262void cpu_thread_swapin(struct thread *); 1263void cpu_thread_swapout(struct thread *); 1264struct thread *thread_alloc(int pages); 1265int thread_check_susp(struct thread *td, bool sleep); 1266void thread_cow_get_proc(struct thread *newtd, struct proc *p); 1267void thread_cow_get(struct thread *newtd, struct thread *td); 1268void thread_cow_free(struct thread *td); 1269void thread_cow_update(struct thread *td); 1270void thread_cow_synced(struct thread *td); 1271int thread_create(struct thread *td, struct rtprio *rtp, 1272 int (*initialize_thread)(struct thread *, void *), void *thunk); 1273void thread_exit(void) __dead2; 1274void thread_free(struct thread *td); 1275void thread_link(struct thread *td, struct proc *p); 1276void thread_reap_barrier(void); 1277int thread_recycle(struct thread *, int pages); 1278int thread_single(struct proc *p, int how); 1279void thread_single_end(struct proc *p, int how); 1280void thread_stash(struct thread *td); 1281void thread_stopped(struct proc *p); 1282void childproc_stopped(struct proc *child, int reason); 1283void childproc_continued(struct proc *child); 1284void childproc_exited(struct proc *child); 1285void thread_run_flash(struct thread *td); 1286int thread_suspend_check(int how); 1287bool thread_suspend_check_needed(void); 1288void thread_suspend_switch(struct thread *, struct proc *p); 1289void thread_suspend_one(struct thread *td); 1290void thread_unlink(struct thread *td); 1291void thread_unsuspend(struct proc *p); 1292void thread_wait(struct proc *p); 1293 1294bool stop_all_proc_block(void); 1295void stop_all_proc_unblock(void); 1296void stop_all_proc(void); 1297void resume_all_proc(void); 1298 1299static __inline int 1300curthread_pflags_set(int flags) 1301{ 1302 struct thread *td; 1303 int save; 1304 1305 td = curthread; 1306 save = ~flags | (td->td_pflags & flags); 1307 td->td_pflags |= flags; 1308 return (save); 1309} 1310 1311static __inline void 1312curthread_pflags_restore(int save) 1313{ 1314 1315 curthread->td_pflags &= save; 1316} 1317 1318static __inline int 1319curthread_pflags2_set(int flags) 1320{ 1321 struct thread *td; 1322 int save; 1323 1324 td = curthread; 1325 save = ~flags | (td->td_pflags2 & flags); 1326 td->td_pflags2 |= flags; 1327 return (save); 1328} 1329 1330static __inline void 1331curthread_pflags2_restore(int save) 1332{ 1333 1334 curthread->td_pflags2 &= save; 1335} 1336 1337static __inline __pure2 struct td_sched * 1338td_get_sched(struct thread *td) 1339{ 1340 1341 return ((struct td_sched *)&td[1]); 1342} 1343 1344#define PROC_ID_PID 0 1345#define PROC_ID_GROUP 1 1346#define PROC_ID_SESSION 2 1347#define PROC_ID_REAP 3 1348 1349void proc_id_set(int type, pid_t id); 1350void proc_id_set_cond(int type, pid_t id); 1351void proc_id_clear(int type, pid_t id); 1352 1353EVENTHANDLER_LIST_DECLARE(process_ctor); 1354EVENTHANDLER_LIST_DECLARE(process_dtor); 1355EVENTHANDLER_LIST_DECLARE(process_init); 1356EVENTHANDLER_LIST_DECLARE(process_fini); 1357EVENTHANDLER_LIST_DECLARE(process_exit); 1358EVENTHANDLER_LIST_DECLARE(process_fork); 1359EVENTHANDLER_LIST_DECLARE(process_exec); 1360 1361EVENTHANDLER_LIST_DECLARE(thread_ctor); 1362EVENTHANDLER_LIST_DECLARE(thread_dtor); 1363EVENTHANDLER_LIST_DECLARE(thread_init); 1364 1365#endif /* _KERNEL */ 1366 1367#endif /* !_SYS_PROC_H_ */ 1368