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FreeBSD/Linux Kernel Cross Reference
sys/sys/proc.h
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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 * @(#)proc.h 8.15 (Berkeley) 5/19/95 37 * $FreeBSD$ 38 */ 39 40 #ifndef _SYS_PROC_H_ 41 #define _SYS_PROC_H_ 42 43 #include <sys/callout.h> /* For struct callout. */ 44 #include <sys/event.h> /* For struct klist. */ 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 */ 85 struct 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 */ 105 struct 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 int pg_jobc; /* (m) Job control process count. */ 112 struct mtx pg_mtx; /* Mutex to protect members */ 113 int pg_flags; /* (m) PGRP_ flags */ 114 }; 115 116 #define PGRP_ORPHANED 0x00000001 /* Group is orphaned */ 117 118 /* 119 * pargs, used to hold a copy of the command line, if it had a sane length. 120 */ 121 struct pargs { 122 u_int ar_ref; /* Reference count. */ 123 u_int ar_length; /* Length. */ 124 u_char ar_args[1]; /* Arguments. */ 125 }; 126 127 /*- 128 * Description of a process. 129 * 130 * This structure contains the information needed to manage a thread of 131 * control, known in UN*X as a process; it has references to substructures 132 * containing descriptions of things that the process uses, but may share 133 * with related processes. The process structure and the substructures 134 * are always addressable except for those marked "(CPU)" below, 135 * which might be addressable only on a processor on which the process 136 * is running. 137 * 138 * Below is a key of locks used to protect each member of struct proc. The 139 * lock is indicated by a reference to a specific character in parens in the 140 * associated comment. 141 * * - not yet protected 142 * a - only touched by curproc or parent during fork/wait 143 * b - created at fork, never changes 144 * (exception aiods switch vmspaces, but they are also 145 * marked 'P_SYSTEM' so hopefully it will be left alone) 146 * c - locked by proc mtx 147 * d - locked by allproc_lock lock 148 * e - locked by proctree_lock lock 149 * f - session mtx 150 * g - process group mtx 151 * h - callout_lock mtx 152 * i - by curproc or the master session mtx 153 * j - locked by proc slock 154 * k - only accessed by curthread 155 * k*- only accessed by curthread and from an interrupt 156 * kx- only accessed by curthread and by debugger 157 * l - the attaching proc or attaching proc parent 158 * m - Giant 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 * z - zombie threads lock 171 * 172 * If the locking key specifies two identifiers (for example, p_pptr) then 173 * either lock is sufficient for read access, but both locks must be held 174 * for write access. 175 */ 176 struct cpuset; 177 struct filecaps; 178 struct filemon; 179 struct kaioinfo; 180 struct kaudit_record; 181 struct kdtrace_proc; 182 struct kdtrace_thread; 183 struct mqueue_notifier; 184 struct nlminfo; 185 struct p_sched; 186 struct proc; 187 struct procdesc; 188 struct racct; 189 struct sbuf; 190 struct sleepqueue; 191 struct socket; 192 struct syscall_args; 193 struct td_sched; 194 struct thread; 195 struct trapframe; 196 struct turnstile; 197 struct vm_map; 198 struct vm_map_entry; 199 200 /* 201 * XXX: Does this belong in resource.h or resourcevar.h instead? 202 * Resource usage extension. The times in rusage structs in the kernel are 203 * never up to date. The actual times are kept as runtimes and tick counts 204 * (with control info in the "previous" times), and are converted when 205 * userland asks for rusage info. Backwards compatibility prevents putting 206 * this directly in the user-visible rusage struct. 207 * 208 * Locking for p_rux: (cu) means (u) for p_rux and (c) for p_crux. 209 * Locking for td_rux: (t) for all fields. 210 */ 211 struct rusage_ext { 212 uint64_t rux_runtime; /* (cu) Real time. */ 213 uint64_t rux_uticks; /* (cu) Statclock hits in user mode. */ 214 uint64_t rux_sticks; /* (cu) Statclock hits in sys mode. */ 215 uint64_t rux_iticks; /* (cu) Statclock hits in intr mode. */ 216 uint64_t rux_uu; /* (c) Previous user time in usec. */ 217 uint64_t rux_su; /* (c) Previous sys time in usec. */ 218 uint64_t rux_tu; /* (c) Previous total time in usec. */ 219 }; 220 221 /* 222 * Kernel runnable context (thread). 223 * This is what is put to sleep and reactivated. 224 * Thread context. Processes may have multiple threads. 225 */ 226 struct thread { 227 struct mtx *volatile td_lock; /* replaces sched lock */ 228 struct proc *td_proc; /* (*) Associated process. */ 229 TAILQ_ENTRY(thread) td_plist; /* (*) All threads in this proc. */ 230 TAILQ_ENTRY(thread) td_runq; /* (t) Run queue. */ 231 TAILQ_ENTRY(thread) td_slpq; /* (t) Sleep queue. */ 232 TAILQ_ENTRY(thread) td_lockq; /* (t) Lock queue. */ 233 LIST_ENTRY(thread) td_hash; /* (d) Hash chain. */ 234 struct cpuset *td_cpuset; /* (t) CPU affinity mask. */ 235 struct domainset_ref td_domain; /* (a) NUMA policy */ 236 struct seltd *td_sel; /* Select queue/channel. */ 237 struct sleepqueue *td_sleepqueue; /* (k) Associated sleep queue. */ 238 struct turnstile *td_turnstile; /* (k) Associated turnstile. */ 239 struct rl_q_entry *td_rlqe; /* (k) Associated range lock entry. */ 240 struct umtx_q *td_umtxq; /* (c?) Link for when we're blocked. */ 241 lwpid_t td_tid; /* (b) Thread ID. */ 242 sigqueue_t td_sigqueue; /* (c) Sigs arrived, not delivered. */ 243 #define td_siglist td_sigqueue.sq_signals 244 u_char td_lend_user_pri; /* (t) Lend user pri. */ 245 246 /* Cleared during fork1() */ 247 #define td_startzero td_epochnest 248 u_char td_epochnest; /* (k) Epoch nest counter. */ 249 int td_flags; /* (t) TDF_* flags. */ 250 int td_inhibitors; /* (t) Why can not run. */ 251 int td_pflags; /* (k) Private thread (TDP_*) flags. */ 252 int td_dupfd; /* (k) Ret value from fdopen. XXX */ 253 int td_sqqueue; /* (t) Sleepqueue queue blocked on. */ 254 void *td_wchan; /* (t) Sleep address. */ 255 const char *td_wmesg; /* (t) Reason for sleep. */ 256 volatile u_char td_owepreempt; /* (k*) Preempt on last critical_exit */ 257 u_char td_tsqueue; /* (t) Turnstile queue blocked on. */ 258 short td_locks; /* (k) Debug: count of non-spin locks */ 259 short td_rw_rlocks; /* (k) Count of rwlock read locks. */ 260 short td_sx_slocks; /* (k) Count of sx shared locks. */ 261 short td_lk_slocks; /* (k) Count of lockmgr shared locks. */ 262 short td_stopsched; /* (k) Scheduler stopped. */ 263 struct turnstile *td_blocked; /* (t) Lock thread is blocked on. */ 264 const char *td_lockname; /* (t) Name of lock blocked on. */ 265 LIST_HEAD(, turnstile) td_contested; /* (q) Contested locks. */ 266 struct lock_list_entry *td_sleeplocks; /* (k) Held sleep locks. */ 267 int td_intr_nesting_level; /* (k) Interrupt recursion. */ 268 int td_pinned; /* (k) Temporary cpu pin count. */ 269 struct ucred *td_ucred; /* (k) Reference to credentials. */ 270 struct plimit *td_limit; /* (k) Resource limits. */ 271 int td_slptick; /* (t) Time at sleep. */ 272 int td_blktick; /* (t) Time spent blocked. */ 273 int td_swvoltick; /* (t) Time at last SW_VOL switch. */ 274 int td_swinvoltick; /* (t) Time at last SW_INVOL switch. */ 275 u_int td_cow; /* (*) Number of copy-on-write faults */ 276 struct rusage td_ru; /* (t) rusage information. */ 277 struct rusage_ext td_rux; /* (t) Internal rusage information. */ 278 uint64_t td_incruntime; /* (t) Cpu ticks to transfer to proc. */ 279 uint64_t td_runtime; /* (t) How many cpu ticks we've run. */ 280 u_int td_pticks; /* (t) Statclock hits for profiling */ 281 u_int td_sticks; /* (t) Statclock hits in system mode. */ 282 u_int td_iticks; /* (t) Statclock hits in intr mode. */ 283 u_int td_uticks; /* (t) Statclock hits in user mode. */ 284 int td_intrval; /* (t) Return value for sleepq. */ 285 sigset_t td_oldsigmask; /* (k) Saved mask from pre sigpause. */ 286 volatile u_int td_generation; /* (k) For detection of preemption */ 287 stack_t td_sigstk; /* (k) Stack ptr and on-stack flag. */ 288 int td_xsig; /* (c) Signal for ptrace */ 289 u_long td_profil_addr; /* (k) Temporary addr until AST. */ 290 u_int td_profil_ticks; /* (k) Temporary ticks until AST. */ 291 char td_name[MAXCOMLEN + 1]; /* (*) Thread name. */ 292 struct file *td_fpop; /* (k) file referencing cdev under op */ 293 int td_dbgflags; /* (c) Userland debugger flags */ 294 siginfo_t td_si; /* (c) For debugger or core file */ 295 int td_ng_outbound; /* (k) Thread entered ng from above. */ 296 struct osd td_osd; /* (k) Object specific data. */ 297 struct vm_map_entry *td_map_def_user; /* (k) Deferred entries. */ 298 pid_t td_dbg_forked; /* (c) Child pid for debugger. */ 299 u_int td_vp_reserv; /* (k) Count of reserved vnodes. */ 300 int td_no_sleeping; /* (k) Sleeping disabled count. */ 301 void *td_su; /* (k) FFS SU private */ 302 sbintime_t td_sleeptimo; /* (t) Sleep timeout. */ 303 int td_rtcgen; /* (s) rtc_generation of abs. sleep */ 304 size_t td_vslock_sz; /* (k) amount of vslock-ed space */ 305 #define td_endzero td_sigmask 306 307 /* Copied during fork1() or create_thread(). */ 308 #define td_startcopy td_endzero 309 sigset_t td_sigmask; /* (c) Current signal mask. */ 310 u_char td_rqindex; /* (t) Run queue index. */ 311 u_char td_base_pri; /* (t) Thread base kernel priority. */ 312 u_char td_priority; /* (t) Thread active priority. */ 313 u_char td_pri_class; /* (t) Scheduling class. */ 314 u_char td_user_pri; /* (t) User pri from estcpu and nice. */ 315 u_char td_base_user_pri; /* (t) Base user pri */ 316 u_char td_pre_epoch_prio; /* (k) User pri on entry to epoch */ 317 uintptr_t td_rb_list; /* (k) Robust list head. */ 318 uintptr_t td_rbp_list; /* (k) Robust priv list head. */ 319 uintptr_t td_rb_inact; /* (k) Current in-action mutex loc. */ 320 struct syscall_args td_sa; /* (kx) Syscall parameters. Copied on 321 fork for child tracing. */ 322 #define td_endcopy td_pcb 323 324 /* 325 * Fields that must be manually set in fork1() or create_thread() 326 * or already have been set in the allocator, constructor, etc. 327 */ 328 struct pcb *td_pcb; /* (k) Kernel VA of pcb and kstack. */ 329 enum { 330 TDS_INACTIVE = 0x0, 331 TDS_INHIBITED, 332 TDS_CAN_RUN, 333 TDS_RUNQ, 334 TDS_RUNNING 335 } td_state; /* (t) thread state */ 336 union { 337 register_t tdu_retval[2]; 338 off_t tdu_off; 339 } td_uretoff; /* (k) Syscall aux returns. */ 340 #define td_retval td_uretoff.tdu_retval 341 u_int td_cowgen; /* (k) Generation of COW pointers. */ 342 /* LP64 hole */ 343 struct callout td_slpcallout; /* (h) Callout for sleep. */ 344 struct trapframe *td_frame; /* (k) */ 345 struct vm_object *td_kstack_obj;/* (a) Kstack object. */ 346 vm_offset_t td_kstack; /* (a) Kernel VA of kstack. */ 347 int td_kstack_pages; /* (a) Size of the kstack. */ 348 volatile u_int td_critnest; /* (k*) Critical section nest level. */ 349 #ifdef __amd64__ 350 uint32_t td_md_pad0[16]; 351 #else 352 struct mdthread td_md; /* (k) Any machine-dependent fields. */ 353 #endif 354 struct kaudit_record *td_ar; /* (k) Active audit record, if any. */ 355 struct lpohead td_lprof[2]; /* (a) lock profiling objects. */ 356 struct kdtrace_thread *td_dtrace; /* (*) DTrace-specific data. */ 357 int td_errno; /* Error returned by last syscall. */ 358 /* LP64 hole */ 359 struct vnet *td_vnet; /* (k) Effective vnet. */ 360 const char *td_vnet_lpush; /* (k) Debugging vnet push / pop. */ 361 struct trapframe *td_intr_frame;/* (k) Frame of the current irq */ 362 struct proc *td_rfppwait_p; /* (k) The vforked child */ 363 struct vm_page **td_ma; /* (k) uio pages held */ 364 int td_ma_cnt; /* (k) size of *td_ma */ 365 /* LP64 hole */ 366 void *td_emuldata; /* Emulator state data */ 367 int td_lastcpu; /* (t) Last cpu we were on. */ 368 int td_oncpu; /* (t) Which cpu we are on. */ 369 void *td_lkpi_task; /* LinuxKPI task struct pointer */ 370 int td_pmcpend; 371 #ifdef __amd64__ 372 struct mdthread td_md; /* (k) Any machine-dependent fields. */ 373 #endif 374 int td_pflags2; /* (k) Private thread (TDP2_*) flags. */ 375 }; 376 377 struct thread0_storage { 378 struct thread t0st_thread; 379 uint64_t t0st_sched[10]; 380 }; 381 382 struct mtx *thread_lock_block(struct thread *); 383 void thread_lock_unblock(struct thread *, struct mtx *); 384 void thread_lock_set(struct thread *, struct mtx *); 385 #define THREAD_LOCK_ASSERT(td, type) \ 386 do { \ 387 struct mtx *__m = (td)->td_lock; \ 388 if (__m != &blocked_lock) \ 389 mtx_assert(__m, (type)); \ 390 } while (0) 391 392 #ifdef INVARIANTS 393 #define THREAD_LOCKPTR_ASSERT(td, lock) \ 394 do { \ 395 struct mtx *__m = (td)->td_lock; \ 396 KASSERT((__m == &blocked_lock || __m == (lock)), \ 397 ("Thread %p lock %p does not match %p", td, __m, (lock))); \ 398 } while (0) 399 400 #define TD_LOCKS_INC(td) ((td)->td_locks++) 401 #define TD_LOCKS_DEC(td) do { \ 402 KASSERT(SCHEDULER_STOPPED_TD(td) || (td)->td_locks > 0, \ 403 ("thread %p owns no locks", (td))); \ 404 (td)->td_locks--; \ 405 } while (0) 406 #else 407 #define THREAD_LOCKPTR_ASSERT(td, lock) 408 409 #define TD_LOCKS_INC(td) 410 #define TD_LOCKS_DEC(td) 411 #endif 412 413 /* 414 * Flags kept in td_flags: 415 * To change these you MUST have the scheduler lock. 416 */ 417 #define TDF_BORROWING 0x00000001 /* Thread is borrowing pri from another. */ 418 #define TDF_INPANIC 0x00000002 /* Caused a panic, let it drive crashdump. */ 419 #define TDF_INMEM 0x00000004 /* Thread's stack is in memory. */ 420 #define TDF_SINTR 0x00000008 /* Sleep is interruptible. */ 421 #define TDF_TIMEOUT 0x00000010 /* Timing out during sleep. */ 422 #define TDF_IDLETD 0x00000020 /* This is a per-CPU idle thread. */ 423 #define TDF_CANSWAP 0x00000040 /* Thread can be swapped. */ 424 #define TDF_SLEEPABORT 0x00000080 /* sleepq_abort was called. */ 425 #define TDF_KTH_SUSP 0x00000100 /* kthread is suspended */ 426 #define TDF_ALLPROCSUSP 0x00000200 /* suspended by SINGLE_ALLPROC */ 427 #define TDF_BOUNDARY 0x00000400 /* Thread suspended at user boundary */ 428 #define TDF_ASTPENDING 0x00000800 /* Thread has some asynchronous events. */ 429 #define TDF_UNUSED12 0x00001000 /* --available-- */ 430 #define TDF_SBDRY 0x00002000 /* Stop only on usermode boundary. */ 431 #define TDF_UPIBLOCKED 0x00004000 /* Thread blocked on user PI mutex. */ 432 #define TDF_NEEDSUSPCHK 0x00008000 /* Thread may need to suspend. */ 433 #define TDF_NEEDRESCHED 0x00010000 /* Thread needs to yield. */ 434 #define TDF_NEEDSIGCHK 0x00020000 /* Thread may need signal delivery. */ 435 #define TDF_NOLOAD 0x00040000 /* Ignore during load avg calculations. */ 436 #define TDF_SERESTART 0x00080000 /* ERESTART on stop attempts. */ 437 #define TDF_THRWAKEUP 0x00100000 /* Libthr thread must not suspend itself. */ 438 #define TDF_SEINTR 0x00200000 /* EINTR on stop attempts. */ 439 #define TDF_SWAPINREQ 0x00400000 /* Swapin request due to wakeup. */ 440 #define TDF_UNUSED23 0x00800000 /* --available-- */ 441 #define TDF_SCHED0 0x01000000 /* Reserved for scheduler private use */ 442 #define TDF_SCHED1 0x02000000 /* Reserved for scheduler private use */ 443 #define TDF_SCHED2 0x04000000 /* Reserved for scheduler private use */ 444 #define TDF_SCHED3 0x08000000 /* Reserved for scheduler private use */ 445 #define TDF_ALRMPEND 0x10000000 /* Pending SIGVTALRM needs to be posted. */ 446 #define TDF_PROFPEND 0x20000000 /* Pending SIGPROF needs to be posted. */ 447 #define TDF_MACPEND 0x40000000 /* AST-based MAC event pending. */ 448 449 /* Userland debug flags */ 450 #define TDB_SUSPEND 0x00000001 /* Thread is suspended by debugger */ 451 #define TDB_XSIG 0x00000002 /* Thread is exchanging signal under trace */ 452 #define TDB_USERWR 0x00000004 /* Debugger modified memory or registers */ 453 #define TDB_SCE 0x00000008 /* Thread performs syscall enter */ 454 #define TDB_SCX 0x00000010 /* Thread performs syscall exit */ 455 #define TDB_EXEC 0x00000020 /* TDB_SCX from exec(2) family */ 456 #define TDB_FORK 0x00000040 /* TDB_SCX from fork(2) that created new 457 process */ 458 #define TDB_STOPATFORK 0x00000080 /* Stop at the return from fork (child 459 only) */ 460 #define TDB_CHILD 0x00000100 /* New child indicator for ptrace() */ 461 #define TDB_BORN 0x00000200 /* New LWP indicator for ptrace() */ 462 #define TDB_EXIT 0x00000400 /* Exiting LWP indicator for ptrace() */ 463 #define TDB_VFORK 0x00000800 /* vfork indicator for ptrace() */ 464 #define TDB_FSTP 0x00001000 /* The thread is PT_ATTACH leader */ 465 #define TDB_STEP 0x00002000 /* (x86) PSL_T set for PT_STEP */ 466 467 /* 468 * "Private" flags kept in td_pflags: 469 * These are only written by curthread and thus need no locking. 470 */ 471 #define TDP_OLDMASK 0x00000001 /* Need to restore mask after suspend. */ 472 #define TDP_INKTR 0x00000002 /* Thread is currently in KTR code. */ 473 #define TDP_INKTRACE 0x00000004 /* Thread is currently in KTRACE code. */ 474 #define TDP_BUFNEED 0x00000008 /* Do not recurse into the buf flush */ 475 #define TDP_COWINPROGRESS 0x00000010 /* Snapshot copy-on-write in progress. */ 476 #define TDP_ALTSTACK 0x00000020 /* Have alternate signal stack. */ 477 #define TDP_DEADLKTREAT 0x00000040 /* Lock acquisition - deadlock treatment. */ 478 #define TDP_NOFAULTING 0x00000080 /* Do not handle page faults. */ 479 #define TDP_UNUSED9 0x00000100 /* --available-- */ 480 #define TDP_OWEUPC 0x00000200 /* Call addupc() at next AST. */ 481 #define TDP_ITHREAD 0x00000400 /* Thread is an interrupt thread. */ 482 #define TDP_SYNCIO 0x00000800 /* Local override, disable async i/o. */ 483 #define TDP_SCHED1 0x00001000 /* Reserved for scheduler private use */ 484 #define TDP_SCHED2 0x00002000 /* Reserved for scheduler private use */ 485 #define TDP_SCHED3 0x00004000 /* Reserved for scheduler private use */ 486 #define TDP_SCHED4 0x00008000 /* Reserved for scheduler private use */ 487 #define TDP_GEOM 0x00010000 /* Settle GEOM before finishing syscall */ 488 #define TDP_SOFTDEP 0x00020000 /* Stuck processing softdep worklist */ 489 #define TDP_NORUNNINGBUF 0x00040000 /* Ignore runningbufspace check */ 490 #define TDP_WAKEUP 0x00080000 /* Don't sleep in umtx cond_wait */ 491 #define TDP_INBDFLUSH 0x00100000 /* Already in BO_BDFLUSH, do not recurse */ 492 #define TDP_KTHREAD 0x00200000 /* This is an official kernel thread */ 493 #define TDP_CALLCHAIN 0x00400000 /* Capture thread's callchain */ 494 #define TDP_IGNSUSP 0x00800000 /* Permission to ignore the MNTK_SUSPEND* */ 495 #define TDP_AUDITREC 0x01000000 /* Audit record pending on thread */ 496 #define TDP_RFPPWAIT 0x02000000 /* Handle RFPPWAIT on syscall exit */ 497 #define TDP_RESETSPUR 0x04000000 /* Reset spurious page fault history. */ 498 #define TDP_NERRNO 0x08000000 /* Last errno is already in td_errno */ 499 #define TDP_UIOHELD 0x10000000 /* Current uio has pages held in td_ma */ 500 #define TDP_FORKING 0x20000000 /* Thread is being created through fork() */ 501 #define TDP_EXECVMSPC 0x40000000 /* Execve destroyed old vmspace */ 502 503 #define TDP2_SBPAGES 0x00000001 /* Owns sbusy on some pages */ 504 #define TDP2_COMPAT32RB 0x00000002 /* compat32 robust lists */ 505 506 /* 507 * Reasons that the current thread can not be run yet. 508 * More than one may apply. 509 */ 510 #define TDI_SUSPENDED 0x0001 /* On suspension queue. */ 511 #define TDI_SLEEPING 0x0002 /* Actually asleep! (tricky). */ 512 #define TDI_SWAPPED 0x0004 /* Stack not in mem. Bad juju if run. */ 513 #define TDI_LOCK 0x0008 /* Stopped on a lock. */ 514 #define TDI_IWAIT 0x0010 /* Awaiting interrupt. */ 515 516 #define TD_IS_SLEEPING(td) ((td)->td_inhibitors & TDI_SLEEPING) 517 #define TD_ON_SLEEPQ(td) ((td)->td_wchan != NULL) 518 #define TD_IS_SUSPENDED(td) ((td)->td_inhibitors & TDI_SUSPENDED) 519 #define TD_IS_SWAPPED(td) ((td)->td_inhibitors & TDI_SWAPPED) 520 #define TD_ON_LOCK(td) ((td)->td_inhibitors & TDI_LOCK) 521 #define TD_AWAITING_INTR(td) ((td)->td_inhibitors & TDI_IWAIT) 522 #define TD_IS_RUNNING(td) ((td)->td_state == TDS_RUNNING) 523 #define TD_ON_RUNQ(td) ((td)->td_state == TDS_RUNQ) 524 #define TD_CAN_RUN(td) ((td)->td_state == TDS_CAN_RUN) 525 #define TD_IS_INHIBITED(td) ((td)->td_state == TDS_INHIBITED) 526 #define TD_ON_UPILOCK(td) ((td)->td_flags & TDF_UPIBLOCKED) 527 #define TD_IS_IDLETHREAD(td) ((td)->td_flags & TDF_IDLETD) 528 529 #define KTDSTATE(td) \ 530 (((td)->td_inhibitors & TDI_SLEEPING) != 0 ? "sleep" : \ 531 ((td)->td_inhibitors & TDI_SUSPENDED) != 0 ? "suspended" : \ 532 ((td)->td_inhibitors & TDI_SWAPPED) != 0 ? "swapped" : \ 533 ((td)->td_inhibitors & TDI_LOCK) != 0 ? "blocked" : \ 534 ((td)->td_inhibitors & TDI_IWAIT) != 0 ? "iwait" : "yielding") 535 536 #define TD_SET_INHIB(td, inhib) do { \ 537 (td)->td_state = TDS_INHIBITED; \ 538 (td)->td_inhibitors |= (inhib); \ 539 } while (0) 540 541 #define TD_CLR_INHIB(td, inhib) do { \ 542 if (((td)->td_inhibitors & (inhib)) && \ 543 (((td)->td_inhibitors &= ~(inhib)) == 0)) \ 544 (td)->td_state = TDS_CAN_RUN; \ 545 } while (0) 546 547 #define TD_SET_SLEEPING(td) TD_SET_INHIB((td), TDI_SLEEPING) 548 #define TD_SET_SWAPPED(td) TD_SET_INHIB((td), TDI_SWAPPED) 549 #define TD_SET_LOCK(td) TD_SET_INHIB((td), TDI_LOCK) 550 #define TD_SET_SUSPENDED(td) TD_SET_INHIB((td), TDI_SUSPENDED) 551 #define TD_SET_IWAIT(td) TD_SET_INHIB((td), TDI_IWAIT) 552 #define TD_SET_EXITING(td) TD_SET_INHIB((td), TDI_EXITING) 553 554 #define TD_CLR_SLEEPING(td) TD_CLR_INHIB((td), TDI_SLEEPING) 555 #define TD_CLR_SWAPPED(td) TD_CLR_INHIB((td), TDI_SWAPPED) 556 #define TD_CLR_LOCK(td) TD_CLR_INHIB((td), TDI_LOCK) 557 #define TD_CLR_SUSPENDED(td) TD_CLR_INHIB((td), TDI_SUSPENDED) 558 #define TD_CLR_IWAIT(td) TD_CLR_INHIB((td), TDI_IWAIT) 559 560 #define TD_SET_RUNNING(td) (td)->td_state = TDS_RUNNING 561 #define TD_SET_RUNQ(td) (td)->td_state = TDS_RUNQ 562 #define TD_SET_CAN_RUN(td) (td)->td_state = TDS_CAN_RUN 563 564 #define TD_SBDRY_INTR(td) \ 565 (((td)->td_flags & (TDF_SEINTR | TDF_SERESTART)) != 0) 566 #define TD_SBDRY_ERRNO(td) \ 567 (((td)->td_flags & TDF_SEINTR) != 0 ? EINTR : ERESTART) 568 569 /* 570 * Process structure. 571 */ 572 struct proc { 573 LIST_ENTRY(proc) p_list; /* (d) List of all processes. */ 574 TAILQ_HEAD(, thread) p_threads; /* (c) all threads. */ 575 struct mtx p_slock; /* process spin lock */ 576 struct ucred *p_ucred; /* (c) Process owner's identity. */ 577 struct filedesc *p_fd; /* (b) Open files. */ 578 struct filedesc_to_leader *p_fdtol; /* (b) Tracking node */ 579 struct pstats *p_stats; /* (b) Accounting/statistics (CPU). */ 580 struct plimit *p_limit; /* (c) Resource limits. */ 581 struct callout p_limco; /* (c) Limit callout handle */ 582 struct sigacts *p_sigacts; /* (x) Signal actions, state (CPU). */ 583 584 int p_flag; /* (c) P_* flags. */ 585 int p_flag2; /* (c) P2_* flags. */ 586 enum { 587 PRS_NEW = 0, /* In creation */ 588 PRS_NORMAL, /* threads can be run. */ 589 PRS_ZOMBIE 590 } p_state; /* (j/c) Process status. */ 591 pid_t p_pid; /* (b) Process identifier. */ 592 LIST_ENTRY(proc) p_hash; /* (d) Hash chain. */ 593 LIST_ENTRY(proc) p_pglist; /* (g + e) List of processes in pgrp. */ 594 struct proc *p_pptr; /* (c + e) Pointer to parent process. */ 595 LIST_ENTRY(proc) p_sibling; /* (e) List of sibling processes. */ 596 LIST_HEAD(, proc) p_children; /* (e) Pointer to list of children. */ 597 struct proc *p_reaper; /* (e) My reaper. */ 598 LIST_HEAD(, proc) p_reaplist; /* (e) List of my descendants 599 (if I am reaper). */ 600 LIST_ENTRY(proc) p_reapsibling; /* (e) List of siblings - descendants of 601 the same reaper. */ 602 struct mtx p_mtx; /* (n) Lock for this struct. */ 603 struct mtx p_statmtx; /* Lock for the stats */ 604 struct mtx p_itimmtx; /* Lock for the virt/prof timers */ 605 struct mtx p_profmtx; /* Lock for the profiling */ 606 struct ksiginfo *p_ksi; /* Locked by parent proc lock */ 607 sigqueue_t p_sigqueue; /* (c) Sigs not delivered to a td. */ 608 #define p_siglist p_sigqueue.sq_signals 609 pid_t p_oppid; /* (c + e) Real parent pid. */ 610 611 /* The following fields are all zeroed upon creation in fork. */ 612 #define p_startzero p_vmspace 613 struct vmspace *p_vmspace; /* (b) Address space. */ 614 u_int p_swtick; /* (c) Tick when swapped in or out. */ 615 u_int p_cowgen; /* (c) Generation of COW pointers. */ 616 struct itimerval p_realtimer; /* (c) Alarm timer. */ 617 struct rusage p_ru; /* (a) Exit information. */ 618 struct rusage_ext p_rux; /* (cu) Internal resource usage. */ 619 struct rusage_ext p_crux; /* (c) Internal child resource usage. */ 620 int p_profthreads; /* (c) Num threads in addupc_task. */ 621 volatile int p_exitthreads; /* (j) Number of threads exiting */ 622 int p_traceflag; /* (o) Kernel trace points. */ 623 struct vnode *p_tracevp; /* (c + o) Trace to vnode. */ 624 struct ucred *p_tracecred; /* (o) Credentials to trace with. */ 625 struct vnode *p_textvp; /* (b) Vnode of executable. */ 626 u_int p_lock; /* (c) Proclock (prevent swap) count. */ 627 struct sigiolst p_sigiolst; /* (c) List of sigio sources. */ 628 int p_sigparent; /* (c) Signal to parent on exit. */ 629 int p_sig; /* (n) For core dump/debugger XXX. */ 630 u_long p_code; /* (n) For core dump/debugger XXX. */ 631 u_int p_stops; /* (c) Stop event bitmask. */ 632 u_int p_stype; /* (c) Stop event type. */ 633 char p_step; /* (c) Process is stopped. */ 634 u_char p_pfsflags; /* (c) Procfs flags. */ 635 u_int p_ptevents; /* (c + e) ptrace() event mask. */ 636 struct nlminfo *p_nlminfo; /* (?) Only used by/for lockd. */ 637 struct kaioinfo *p_aioinfo; /* (y) ASYNC I/O info. */ 638 struct thread *p_singlethread;/* (c + j) If single threading this is it */ 639 int p_suspcount; /* (j) Num threads in suspended mode. */ 640 struct thread *p_xthread; /* (c) Trap thread */ 641 int p_boundary_count;/* (j) Num threads at user boundary */ 642 int p_pendingcnt; /* how many signals are pending */ 643 struct itimers *p_itimers; /* (c) POSIX interval timers. */ 644 struct procdesc *p_procdesc; /* (e) Process descriptor, if any. */ 645 u_int p_treeflag; /* (e) P_TREE flags */ 646 int p_pendingexits; /* (c) Count of pending thread exits. */ 647 struct filemon *p_filemon; /* (c) filemon-specific data. */ 648 int p_pdeathsig; /* (c) Signal from parent on exit. */ 649 /* End area that is zeroed on creation. */ 650 #define p_endzero p_magic 651 652 /* The following fields are all copied upon creation in fork. */ 653 #define p_startcopy p_endzero 654 u_int p_magic; /* (b) Magic number. */ 655 int p_osrel; /* (x) osreldate for the 656 binary (from ELF note, if any) */ 657 char p_comm[MAXCOMLEN + 1]; /* (x) Process name. */ 658 struct sysentvec *p_sysent; /* (b) Syscall dispatch info. */ 659 struct pargs *p_args; /* (c) Process arguments. */ 660 rlim_t p_cpulimit; /* (c) Current CPU limit in seconds. */ 661 signed char p_nice; /* (c) Process "nice" value. */ 662 int p_fibnum; /* in this routing domain XXX MRT */ 663 pid_t p_reapsubtree; /* (e) Pid of the direct child of the 664 reaper which spawned 665 our subtree. */ 666 uint16_t p_elf_machine; /* (x) ELF machine type */ 667 uint64_t p_elf_flags; /* (x) ELF flags */ 668 /* End area that is copied on creation. */ 669 #define p_endcopy p_xexit 670 671 u_int p_xexit; /* (c) Exit code. */ 672 u_int p_xsig; /* (c) Stop/kill sig. */ 673 struct pgrp *p_pgrp; /* (c + e) Pointer to process group. */ 674 struct knlist *p_klist; /* (c) Knotes attached to this proc. */ 675 int p_numthreads; /* (c) Number of threads. */ 676 struct mdproc p_md; /* Any machine-dependent fields. */ 677 struct callout p_itcallout; /* (h + c) Interval timer callout. */ 678 u_short p_acflag; /* (c) Accounting flags. */ 679 struct proc *p_peers; /* (r) */ 680 struct proc *p_leader; /* (b) */ 681 void *p_emuldata; /* (c) Emulator state data. */ 682 struct label *p_label; /* (*) Proc (not subject) MAC label. */ 683 STAILQ_HEAD(, ktr_request) p_ktr; /* (o) KTR event queue. */ 684 LIST_HEAD(, mqueue_notifier) p_mqnotifier; /* (c) mqueue notifiers.*/ 685 struct kdtrace_proc *p_dtrace; /* (*) DTrace-specific data. */ 686 struct cv p_pwait; /* (*) wait cv for exit/exec. */ 687 uint64_t p_prev_runtime; /* (c) Resource usage accounting. */ 688 struct racct *p_racct; /* (b) Resource accounting. */ 689 int p_throttled; /* (c) Flag for racct pcpu throttling */ 690 /* 691 * An orphan is the child that has been re-parented to the 692 * debugger as a result of attaching to it. Need to keep 693 * track of them for parent to be able to collect the exit 694 * status of what used to be children. 695 */ 696 LIST_ENTRY(proc) p_orphan; /* (e) List of orphan processes. */ 697 LIST_HEAD(, proc) p_orphans; /* (e) Pointer to list of orphans. */ 698 uint32_t p_fctl0; /* (x) ABI feature control, ELF note */ 699 u_int p_amd64_md_flags; /* (c) md process flags P_MD */ 700 }; 701 702 #define p_session p_pgrp->pg_session 703 #define p_pgid p_pgrp->pg_id 704 705 #define NOCPU (-1) /* For when we aren't on a CPU. */ 706 #define NOCPU_OLD (255) 707 #define MAXCPU_OLD (254) 708 709 #define PROC_SLOCK(p) mtx_lock_spin(&(p)->p_slock) 710 #define PROC_SUNLOCK(p) mtx_unlock_spin(&(p)->p_slock) 711 #define PROC_SLOCK_ASSERT(p, type) mtx_assert(&(p)->p_slock, (type)) 712 713 #define PROC_STATLOCK(p) mtx_lock_spin(&(p)->p_statmtx) 714 #define PROC_STATUNLOCK(p) mtx_unlock_spin(&(p)->p_statmtx) 715 #define PROC_STATLOCK_ASSERT(p, type) mtx_assert(&(p)->p_statmtx, (type)) 716 717 #define PROC_ITIMLOCK(p) mtx_lock_spin(&(p)->p_itimmtx) 718 #define PROC_ITIMUNLOCK(p) mtx_unlock_spin(&(p)->p_itimmtx) 719 #define PROC_ITIMLOCK_ASSERT(p, type) mtx_assert(&(p)->p_itimmtx, (type)) 720 721 #define PROC_PROFLOCK(p) mtx_lock_spin(&(p)->p_profmtx) 722 #define PROC_PROFUNLOCK(p) mtx_unlock_spin(&(p)->p_profmtx) 723 #define PROC_PROFLOCK_ASSERT(p, type) mtx_assert(&(p)->p_profmtx, (type)) 724 725 /* These flags are kept in p_flag. */ 726 #define P_ADVLOCK 0x00000001 /* Process may hold a POSIX advisory 727 lock. */ 728 #define P_CONTROLT 0x00000002 /* Has a controlling terminal. */ 729 #define P_KPROC 0x00000004 /* Kernel process. */ 730 #define P_UNUSED3 0x00000008 /* --available-- */ 731 #define P_PPWAIT 0x00000010 /* Parent is waiting for child to 732 exec/exit. */ 733 #define P_PROFIL 0x00000020 /* Has started profiling. */ 734 #define P_STOPPROF 0x00000040 /* Has thread requesting to stop 735 profiling. */ 736 #define P_HADTHREADS 0x00000080 /* Has had threads (no cleanup 737 shortcuts) */ 738 #define P_SUGID 0x00000100 /* Had set id privileges since last 739 exec. */ 740 #define P_SYSTEM 0x00000200 /* System proc: no sigs, stats or 741 swapping. */ 742 #define P_SINGLE_EXIT 0x00000400 /* Threads suspending should exit, 743 not wait. */ 744 #define P_TRACED 0x00000800 /* Debugged process being traced. */ 745 #define P_WAITED 0x00001000 /* Someone is waiting for us. */ 746 #define P_WEXIT 0x00002000 /* Working on exiting. */ 747 #define P_EXEC 0x00004000 /* Process called exec. */ 748 #define P_WKILLED 0x00008000 /* Killed, go to kernel/user boundary 749 ASAP. */ 750 #define P_CONTINUED 0x00010000 /* Proc has continued from a stopped 751 state. */ 752 #define P_STOPPED_SIG 0x00020000 /* Stopped due to SIGSTOP/SIGTSTP. */ 753 #define P_STOPPED_TRACE 0x00040000 /* Stopped because of tracing. */ 754 #define P_STOPPED_SINGLE 0x00080000 /* Only 1 thread can continue (not to 755 user). */ 756 #define P_PROTECTED 0x00100000 /* Do not kill on memory overcommit. */ 757 #define P_SIGEVENT 0x00200000 /* Process pending signals changed. */ 758 #define P_SINGLE_BOUNDARY 0x00400000 /* Threads should suspend at user 759 boundary. */ 760 #define P_HWPMC 0x00800000 /* Process is using HWPMCs */ 761 #define P_JAILED 0x01000000 /* Process is in jail. */ 762 #define P_TOTAL_STOP 0x02000000 /* Stopped in stop_all_proc. */ 763 #define P_INEXEC 0x04000000 /* Process is in execve(). */ 764 #define P_STATCHILD 0x08000000 /* Child process stopped or exited. */ 765 #define P_INMEM 0x10000000 /* Loaded into memory. */ 766 #define P_SWAPPINGOUT 0x20000000 /* Process is being swapped out. */ 767 #define P_SWAPPINGIN 0x40000000 /* Process is being swapped in. */ 768 #define P_PPTRACE 0x80000000 /* PT_TRACEME by vforked child. */ 769 770 #define P_STOPPED (P_STOPPED_SIG|P_STOPPED_SINGLE|P_STOPPED_TRACE) 771 #define P_SHOULDSTOP(p) ((p)->p_flag & P_STOPPED) 772 #define P_KILLED(p) ((p)->p_flag & P_WKILLED) 773 774 /* These flags are kept in p_flag2. */ 775 #define P2_INHERIT_PROTECTED 0x00000001 /* New children get 776 P_PROTECTED. */ 777 #define P2_NOTRACE 0x00000002 /* No ptrace(2) attach or 778 coredumps. */ 779 #define P2_NOTRACE_EXEC 0x00000004 /* Keep P2_NOPTRACE on 780 exec(2). */ 781 #define P2_AST_SU 0x00000008 /* Handles SU ast for 782 kthreads. */ 783 #define P2_PTRACE_FSTP 0x00000010 /* SIGSTOP from PT_ATTACH not 784 yet handled. */ 785 #define P2_TRAPCAP 0x00000020 /* SIGTRAP on ENOTCAPABLE */ 786 #define P2_ASLR_ENABLE 0x00000040 /* Force enable ASLR. */ 787 #define P2_ASLR_DISABLE 0x00000080 /* Force disable ASLR. */ 788 #define P2_ASLR_IGNSTART 0x00000100 /* Enable ASLR to consume sbrk 789 area. */ 790 #define P2_STKGAP_DISABLE 0x00000800 /* Disable stack gap for 791 MAP_STACK */ 792 #define P2_STKGAP_DISABLE_EXEC 0x00001000 /* Stack gap disabled 793 after exec */ 794 795 /* Flags protected by proctree_lock, kept in p_treeflags. */ 796 #define P_TREE_ORPHANED 0x00000001 /* Reparented, on orphan list */ 797 #define P_TREE_FIRST_ORPHAN 0x00000002 /* First element of orphan 798 list */ 799 #define P_TREE_REAPER 0x00000004 /* Reaper of subtree */ 800 #define P_TREE_GRPEXITED 0x00000008 /* exit1() done with job ctl */ 801 802 /* 803 * These were process status values (p_stat), now they are only used in 804 * legacy conversion code. 805 */ 806 #define SIDL 1 /* Process being created by fork. */ 807 #define SRUN 2 /* Currently runnable. */ 808 #define SSLEEP 3 /* Sleeping on an address. */ 809 #define SSTOP 4 /* Process debugging or suspension. */ 810 #define SZOMB 5 /* Awaiting collection by parent. */ 811 #define SWAIT 6 /* Waiting for interrupt. */ 812 #define SLOCK 7 /* Blocked on a lock. */ 813 814 #define P_MAGIC 0xbeefface 815 816 #ifdef _KERNEL 817 818 /* Types and flags for mi_switch(). */ 819 #define SW_TYPE_MASK 0xff /* First 8 bits are switch type */ 820 #define SWT_NONE 0 /* Unspecified switch. */ 821 #define SWT_PREEMPT 1 /* Switching due to preemption. */ 822 #define SWT_OWEPREEMPT 2 /* Switching due to owepreempt. */ 823 #define SWT_TURNSTILE 3 /* Turnstile contention. */ 824 #define SWT_SLEEPQ 4 /* Sleepq wait. */ 825 #define SWT_SLEEPQTIMO 5 /* Sleepq timeout wait. */ 826 #define SWT_RELINQUISH 6 /* yield call. */ 827 #define SWT_NEEDRESCHED 7 /* NEEDRESCHED was set. */ 828 #define SWT_IDLE 8 /* Switching from the idle thread. */ 829 #define SWT_IWAIT 9 /* Waiting for interrupts. */ 830 #define SWT_SUSPEND 10 /* Thread suspended. */ 831 #define SWT_REMOTEPREEMPT 11 /* Remote processor preempted. */ 832 #define SWT_REMOTEWAKEIDLE 12 /* Remote processor preempted idle. */ 833 #define SWT_COUNT 13 /* Number of switch types. */ 834 /* Flags */ 835 #define SW_VOL 0x0100 /* Voluntary switch. */ 836 #define SW_INVOL 0x0200 /* Involuntary switch. */ 837 #define SW_PREEMPT 0x0400 /* The invol switch is a preemption */ 838 839 /* How values for thread_single(). */ 840 #define SINGLE_NO_EXIT 0 841 #define SINGLE_EXIT 1 842 #define SINGLE_BOUNDARY 2 843 #define SINGLE_ALLPROC 3 844 845 #ifdef MALLOC_DECLARE 846 MALLOC_DECLARE(M_PARGS); 847 MALLOC_DECLARE(M_SESSION); 848 MALLOC_DECLARE(M_SUBPROC); 849 #endif 850 851 #define FOREACH_PROC_IN_SYSTEM(p) \ 852 LIST_FOREACH((p), &allproc, p_list) 853 #define FOREACH_THREAD_IN_PROC(p, td) \ 854 TAILQ_FOREACH((td), &(p)->p_threads, td_plist) 855 856 #define FIRST_THREAD_IN_PROC(p) TAILQ_FIRST(&(p)->p_threads) 857 858 /* 859 * We use process IDs <= pid_max <= PID_MAX; PID_MAX + 1 must also fit 860 * in a pid_t, as it is used to represent "no process group". 861 */ 862 #define PID_MAX 99999 863 #define NO_PID 100000 864 extern pid_t pid_max; 865 866 #define SESS_LEADER(p) ((p)->p_session->s_leader == (p)) 867 868 869 #define STOPEVENT(p, e, v) do { \ 870 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL, \ 871 "checking stopevent %d", (e)); \ 872 if ((p)->p_stops & (e)) { \ 873 PROC_LOCK(p); \ 874 stopevent((p), (e), (v)); \ 875 PROC_UNLOCK(p); \ 876 } \ 877 } while (0) 878 #define _STOPEVENT(p, e, v) do { \ 879 PROC_LOCK_ASSERT(p, MA_OWNED); \ 880 WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.lock_object, \ 881 "checking stopevent %d", (e)); \ 882 if ((p)->p_stops & (e)) \ 883 stopevent((p), (e), (v)); \ 884 } while (0) 885 886 /* Lock and unlock a process. */ 887 #define PROC_LOCK(p) mtx_lock(&(p)->p_mtx) 888 #define PROC_TRYLOCK(p) mtx_trylock(&(p)->p_mtx) 889 #define PROC_UNLOCK(p) mtx_unlock(&(p)->p_mtx) 890 #define PROC_LOCKED(p) mtx_owned(&(p)->p_mtx) 891 #define PROC_LOCK_ASSERT(p, type) mtx_assert(&(p)->p_mtx, (type)) 892 893 /* Lock and unlock a process group. */ 894 #define PGRP_LOCK(pg) mtx_lock(&(pg)->pg_mtx) 895 #define PGRP_UNLOCK(pg) mtx_unlock(&(pg)->pg_mtx) 896 #define PGRP_LOCKED(pg) mtx_owned(&(pg)->pg_mtx) 897 #define PGRP_LOCK_ASSERT(pg, type) mtx_assert(&(pg)->pg_mtx, (type)) 898 899 #define PGRP_LOCK_PGSIGNAL(pg) do { \ 900 if ((pg) != NULL) \ 901 PGRP_LOCK(pg); \ 902 } while (0) 903 #define PGRP_UNLOCK_PGSIGNAL(pg) do { \ 904 if ((pg) != NULL) \ 905 PGRP_UNLOCK(pg); \ 906 } while (0) 907 908 /* Lock and unlock a session. */ 909 #define SESS_LOCK(s) mtx_lock(&(s)->s_mtx) 910 #define SESS_UNLOCK(s) mtx_unlock(&(s)->s_mtx) 911 #define SESS_LOCKED(s) mtx_owned(&(s)->s_mtx) 912 #define SESS_LOCK_ASSERT(s, type) mtx_assert(&(s)->s_mtx, (type)) 913 914 /* 915 * Non-zero p_lock ensures that: 916 * - exit1() is not performed until p_lock reaches zero; 917 * - the process' threads stack are not swapped out if they are currently 918 * not (P_INMEM). 919 * 920 * PHOLD() asserts that the process (except the current process) is 921 * not exiting, increments p_lock and swaps threads stacks into memory, 922 * if needed. 923 * _PHOLD() is same as PHOLD(), it takes the process locked. 924 * _PHOLD_LITE() also takes the process locked, but comparing with 925 * _PHOLD(), it only guarantees that exit1() is not executed, 926 * faultin() is not called. 927 */ 928 #define PHOLD(p) do { \ 929 PROC_LOCK(p); \ 930 _PHOLD(p); \ 931 PROC_UNLOCK(p); \ 932 } while (0) 933 #define _PHOLD(p) do { \ 934 PROC_LOCK_ASSERT((p), MA_OWNED); \ 935 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \ 936 ("PHOLD of exiting process %p", p)); \ 937 (p)->p_lock++; \ 938 if (((p)->p_flag & P_INMEM) == 0) \ 939 faultin((p)); \ 940 } while (0) 941 #define _PHOLD_LITE(p) do { \ 942 PROC_LOCK_ASSERT((p), MA_OWNED); \ 943 KASSERT(!((p)->p_flag & P_WEXIT) || (p) == curproc, \ 944 ("PHOLD of exiting process %p", p)); \ 945 (p)->p_lock++; \ 946 } while (0) 947 #define PROC_ASSERT_HELD(p) do { \ 948 KASSERT((p)->p_lock > 0, ("process %p not held", p)); \ 949 } while (0) 950 951 #define PRELE(p) do { \ 952 PROC_LOCK((p)); \ 953 _PRELE((p)); \ 954 PROC_UNLOCK((p)); \ 955 } while (0) 956 #define _PRELE(p) do { \ 957 PROC_LOCK_ASSERT((p), MA_OWNED); \ 958 PROC_ASSERT_HELD(p); \ 959 (--(p)->p_lock); \ 960 if (((p)->p_flag & P_WEXIT) && (p)->p_lock == 0) \ 961 wakeup(&(p)->p_lock); \ 962 } while (0) 963 #define PROC_ASSERT_NOT_HELD(p) do { \ 964 KASSERT((p)->p_lock == 0, ("process %p held", p)); \ 965 } while (0) 966 967 #define PROC_UPDATE_COW(p) do { \ 968 PROC_LOCK_ASSERT((p), MA_OWNED); \ 969 (p)->p_cowgen++; \ 970 } while (0) 971 972 /* Check whether a thread is safe to be swapped out. */ 973 #define thread_safetoswapout(td) ((td)->td_flags & TDF_CANSWAP) 974 975 /* Control whether or not it is safe for curthread to sleep. */ 976 #define THREAD_NO_SLEEPING() ((curthread)->td_no_sleeping++) 977 978 #define THREAD_SLEEPING_OK() ((curthread)->td_no_sleeping--) 979 980 #define THREAD_CAN_SLEEP() ((curthread)->td_no_sleeping == 0) 981 982 #define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash]) 983 extern LIST_HEAD(pidhashhead, proc) *pidhashtbl; 984 extern u_long pidhash; 985 #define TIDHASH(tid) (&tidhashtbl[(tid) & tidhash]) 986 extern LIST_HEAD(tidhashhead, thread) *tidhashtbl; 987 extern u_long tidhash; 988 extern struct rwlock tidhash_lock; 989 990 #define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash]) 991 extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl; 992 extern u_long pgrphash; 993 994 extern struct sx allproc_lock; 995 extern int allproc_gen; 996 extern struct sx proctree_lock; 997 extern struct mtx ppeers_lock; 998 extern struct proc proc0; /* Process slot for swapper. */ 999 extern struct thread0_storage thread0_st; /* Primary thread in proc0. */ 1000 #define thread0 (thread0_st.t0st_thread) 1001 extern struct vmspace vmspace0; /* VM space for proc0. */ 1002 extern int hogticks; /* Limit on kernel cpu hogs. */ 1003 extern int lastpid; 1004 extern int nprocs, maxproc; /* Current and max number of procs. */ 1005 extern int maxprocperuid; /* Max procs per uid. */ 1006 extern u_long ps_arg_cache_limit; 1007 1008 LIST_HEAD(proclist, proc); 1009 TAILQ_HEAD(procqueue, proc); 1010 TAILQ_HEAD(threadqueue, thread); 1011 extern struct proclist allproc; /* List of all processes. */ 1012 extern struct proclist zombproc; /* List of zombie processes. */ 1013 extern struct proc *initproc, *pageproc; /* Process slots for init, pager. */ 1014 1015 extern struct uma_zone *proc_zone; 1016 extern struct uma_zone *pgrp_zone; 1017 1018 struct proc *pfind(pid_t); /* Find process by id. */ 1019 struct proc *pfind_any(pid_t); /* Find (zombie) process by id. */ 1020 struct proc *pfind_locked(pid_t pid); 1021 struct pgrp *pgfind(pid_t); /* Find process group by id. */ 1022 struct proc *zpfind(pid_t); /* Find zombie process by id. */ 1023 1024 struct fork_req { 1025 int fr_flags; 1026 int fr_pages; 1027 int *fr_pidp; 1028 struct proc **fr_procp; 1029 int *fr_pd_fd; 1030 int fr_pd_flags; 1031 struct filecaps *fr_pd_fcaps; 1032 int fr_flags2; 1033 #define FR2_DROPSIG_CAUGHT 0x00001 /* Drop caught non-DFL signals */ 1034 }; 1035 1036 /* 1037 * pget() flags. 1038 */ 1039 #define PGET_HOLD 0x00001 /* Hold the process. */ 1040 #define PGET_CANSEE 0x00002 /* Check against p_cansee(). */ 1041 #define PGET_CANDEBUG 0x00004 /* Check against p_candebug(). */ 1042 #define PGET_ISCURRENT 0x00008 /* Check that the found process is current. */ 1043 #define PGET_NOTWEXIT 0x00010 /* Check that the process is not in P_WEXIT. */ 1044 #define PGET_NOTINEXEC 0x00020 /* Check that the process is not in P_INEXEC. */ 1045 #define PGET_NOTID 0x00040 /* Do not assume tid if pid > PID_MAX. */ 1046 1047 #define PGET_WANTREAD (PGET_HOLD | PGET_CANDEBUG | PGET_NOTWEXIT) 1048 1049 int pget(pid_t pid, int flags, struct proc **pp); 1050 1051 void ast(struct trapframe *framep); 1052 struct thread *choosethread(void); 1053 int cr_cansee(struct ucred *u1, struct ucred *u2); 1054 int cr_canseesocket(struct ucred *cred, struct socket *so); 1055 int cr_canseeothergids(struct ucred *u1, struct ucred *u2); 1056 int cr_canseeotheruids(struct ucred *u1, struct ucred *u2); 1057 int cr_canseejailproc(struct ucred *u1, struct ucred *u2); 1058 int cr_cansignal(struct ucred *cred, struct proc *proc, int signum); 1059 int enterpgrp(struct proc *p, pid_t pgid, struct pgrp *pgrp, 1060 struct session *sess); 1061 int enterthispgrp(struct proc *p, struct pgrp *pgrp); 1062 void faultin(struct proc *p); 1063 int fork1(struct thread *, struct fork_req *); 1064 void fork_exit(void (*)(void *, struct trapframe *), void *, 1065 struct trapframe *); 1066 void fork_return(struct thread *, struct trapframe *); 1067 int inferior(struct proc *p); 1068 void kern_proc_vmmap_resident(struct vm_map *map, struct vm_map_entry *entry, 1069 int *resident_count, bool *super); 1070 void kern_yield(int); 1071 void kick_proc0(void); 1072 void killjobc(void); 1073 int leavepgrp(struct proc *p); 1074 int maybe_preempt(struct thread *td); 1075 void maybe_yield(void); 1076 void mi_switch(int flags, struct thread *newtd); 1077 int p_candebug(struct thread *td, struct proc *p); 1078 int p_cansee(struct thread *td, struct proc *p); 1079 int p_cansched(struct thread *td, struct proc *p); 1080 int p_cansignal(struct thread *td, struct proc *p, int signum); 1081 int p_canwait(struct thread *td, struct proc *p); 1082 struct pargs *pargs_alloc(int len); 1083 void pargs_drop(struct pargs *pa); 1084 void pargs_hold(struct pargs *pa); 1085 int proc_getargv(struct thread *td, struct proc *p, struct sbuf *sb); 1086 int proc_getauxv(struct thread *td, struct proc *p, struct sbuf *sb); 1087 int proc_getenvv(struct thread *td, struct proc *p, struct sbuf *sb); 1088 void procinit(void); 1089 void proc_linkup0(struct proc *p, struct thread *td); 1090 void proc_linkup(struct proc *p, struct thread *td); 1091 struct proc *proc_realparent(struct proc *child); 1092 void proc_reap(struct thread *td, struct proc *p, int *status, int options); 1093 void proc_reparent(struct proc *child, struct proc *newparent, bool set_oppid); 1094 void proc_add_orphan(struct proc *child, struct proc *parent); 1095 void proc_set_traced(struct proc *p, bool stop); 1096 void proc_wkilled(struct proc *p); 1097 struct pstats *pstats_alloc(void); 1098 void pstats_fork(struct pstats *src, struct pstats *dst); 1099 void pstats_free(struct pstats *ps); 1100 void proc_clear_orphan(struct proc *p); 1101 void reaper_abandon_children(struct proc *p, bool exiting); 1102 int securelevel_ge(struct ucred *cr, int level); 1103 int securelevel_gt(struct ucred *cr, int level); 1104 void sess_hold(struct session *); 1105 void sess_release(struct session *); 1106 int setrunnable(struct thread *); 1107 void setsugid(struct proc *p); 1108 int should_yield(void); 1109 int sigonstack(size_t sp); 1110 void stopevent(struct proc *, u_int, u_int); 1111 struct thread *tdfind(lwpid_t, pid_t); 1112 void threadinit(void); 1113 void tidhash_add(struct thread *); 1114 void tidhash_remove(struct thread *); 1115 void cpu_idle(int); 1116 int cpu_idle_wakeup(int); 1117 extern void (*cpu_idle_hook)(sbintime_t); /* Hook to machdep CPU idler. */ 1118 void cpu_switch(struct thread *, struct thread *, struct mtx *); 1119 void cpu_throw(struct thread *, struct thread *) __dead2; 1120 void unsleep(struct thread *); 1121 void userret(struct thread *, struct trapframe *); 1122 1123 void cpu_exit(struct thread *); 1124 void exit1(struct thread *, int, int) __dead2; 1125 void cpu_copy_thread(struct thread *td, struct thread *td0); 1126 bool cpu_exec_vmspace_reuse(struct proc *p, struct vm_map *map); 1127 int cpu_fetch_syscall_args(struct thread *td); 1128 void cpu_fork(struct thread *, struct proc *, struct thread *, int); 1129 void cpu_fork_kthread_handler(struct thread *, void (*)(void *), void *); 1130 int cpu_procctl(struct thread *td, int idtype, id_t id, int com, 1131 void *data); 1132 void cpu_set_syscall_retval(struct thread *, int); 1133 void cpu_set_upcall(struct thread *, void (*)(void *), void *, 1134 stack_t *); 1135 int cpu_set_user_tls(struct thread *, void *tls_base); 1136 void cpu_thread_alloc(struct thread *); 1137 void cpu_thread_clean(struct thread *); 1138 void cpu_thread_exit(struct thread *); 1139 void cpu_thread_free(struct thread *); 1140 void cpu_thread_swapin(struct thread *); 1141 void cpu_thread_swapout(struct thread *); 1142 struct thread *thread_alloc(int pages); 1143 int thread_alloc_stack(struct thread *, int pages); 1144 int thread_check_susp(struct thread *td, bool sleep); 1145 void thread_cow_get_proc(struct thread *newtd, struct proc *p); 1146 void thread_cow_get(struct thread *newtd, struct thread *td); 1147 void thread_cow_free(struct thread *td); 1148 void thread_cow_update(struct thread *td); 1149 int thread_create(struct thread *td, struct rtprio *rtp, 1150 int (*initialize_thread)(struct thread *, void *), void *thunk); 1151 void thread_exit(void) __dead2; 1152 void thread_free(struct thread *td); 1153 void thread_link(struct thread *td, struct proc *p); 1154 void thread_reap(void); 1155 int thread_single(struct proc *p, int how); 1156 void thread_single_end(struct proc *p, int how); 1157 void thread_stash(struct thread *td); 1158 void thread_stopped(struct proc *p); 1159 void childproc_stopped(struct proc *child, int reason); 1160 void childproc_continued(struct proc *child); 1161 void childproc_exited(struct proc *child); 1162 int thread_suspend_check(int how); 1163 bool thread_suspend_check_needed(void); 1164 void thread_suspend_switch(struct thread *, struct proc *p); 1165 void thread_suspend_one(struct thread *td); 1166 void thread_unlink(struct thread *td); 1167 void thread_unsuspend(struct proc *p); 1168 void thread_wait(struct proc *p); 1169 struct thread *thread_find(struct proc *p, lwpid_t tid); 1170 1171 void stop_all_proc(void); 1172 void resume_all_proc(void); 1173 1174 static __inline int 1175 curthread_pflags_set(int flags) 1176 { 1177 struct thread *td; 1178 int save; 1179 1180 td = curthread; 1181 save = ~flags | (td->td_pflags & flags); 1182 td->td_pflags |= flags; 1183 return (save); 1184 } 1185 1186 static __inline void 1187 curthread_pflags_restore(int save) 1188 { 1189 1190 curthread->td_pflags &= save; 1191 } 1192 1193 static __inline int 1194 curthread_pflags2_set(int flags) 1195 { 1196 struct thread *td; 1197 int save; 1198 1199 td = curthread; 1200 save = ~flags | (td->td_pflags2 & flags); 1201 td->td_pflags2 |= flags; 1202 return (save); 1203 } 1204 1205 static __inline void 1206 curthread_pflags2_restore(int save) 1207 { 1208 1209 curthread->td_pflags2 &= save; 1210 } 1211 1212 static __inline __pure2 struct td_sched * 1213 td_get_sched(struct thread *td) 1214 { 1215 1216 return ((struct td_sched *)&td[1]); 1217 } 1218 1219 extern void (*softdep_ast_cleanup)(struct thread *); 1220 static __inline void 1221 td_softdep_cleanup(struct thread *td) 1222 { 1223 1224 if (td->td_su != NULL && softdep_ast_cleanup != NULL) 1225 softdep_ast_cleanup(td); 1226 } 1227 1228 #endif /* _KERNEL */ 1229 1230 #endif /* !_SYS_PROC_H_ */
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