1 /* 2 * Copyright (c) 2000-2018 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */ 29 /*- 30 * Copyright (c) 1986, 1989, 1991, 1993 31 * The Regents of the University of California. All rights reserved. 32 * (c) UNIX System Laboratories, Inc. 33 * All or some portions of this file are derived from material licensed 34 * to the University of California by American Telephone and Telegraph 35 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 36 * the permission of UNIX System Laboratories, Inc. 37 * 38 * Redistribution and use in source and binary forms, with or without 39 * modification, are permitted provided that the following conditions 40 * are met: 41 * 1. Redistributions of source code must retain the above copyright 42 * notice, this list of conditions and the following disclaimer. 43 * 2. Redistributions in binary form must reproduce the above copyright 44 * notice, this list of conditions and the following disclaimer in the 45 * documentation and/or other materials provided with the distribution. 46 * 3. All advertising materials mentioning features or use of this software 47 * must display the following acknowledgement: 48 * This product includes software developed by the University of 49 * California, Berkeley and its contributors. 50 * 4. Neither the name of the University nor the names of its contributors 51 * may be used to endorse or promote products derived from this software 52 * without specific prior written permission. 53 * 54 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 55 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 56 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 57 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 58 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 60 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 61 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 64 * SUCH DAMAGE. 65 * 66 * @(#)proc_internal.h 8.15 (Berkeley) 5/19/95 67 */ 68 /* 69 * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce 70 * support for mandatory and extensible security protections. This notice 71 * is included in support of clause 2.2 (b) of the Apple Public License, 72 * Version 2.0. 73 */ 74 75 #ifndef _SYS_PROC_INTERNAL_H_ 76 #define _SYS_PROC_INTERNAL_H_ 77 78 #include <kern/smr.h> 79 #include <kern/kalloc.h> 80 #include <libkern/OSAtomic.h> 81 #include <sys/cdefs.h> 82 #include <sys/filedesc.h> 83 #include <sys/proc.h> 84 #include <sys/proc_ro.h> 85 #include <sys/signalvar.h> 86 #include <mach/resource_monitors.h> // command/proc_name_t 87 88 __BEGIN_DECLS 89 #include <kern/locks.h> 90 #if PSYNCH 91 #include <kern/thread_call.h> 92 #endif /* PSYNCH */ 93 __END_DECLS 94 95 #if DEBUG 96 #define __PROC_INTERNAL_DEBUG 1 97 #endif 98 99 /* 100 * The short form for various locks that protect fields in the data structures. 101 * PL = Process Lock 102 * PGL = Process Group Lock 103 * PUCL = Process User Credentials Lock 104 * PSL = Process Spin Lock 105 * LL = List Lock 106 * SL = Session Lock 107 * TTYL = TTY Lock 108 * 109 * C = constant/static 110 */ 111 struct label; 112 113 /* 114 * Flags kept in the low bits of `struct session::s_refcount` 115 */ 116 __options_decl(session_ref_bits_t, uint32_t, { 117 S_DEFAULT = 0x00, 118 S_NOCTTY = 0x01, /* Do not associate controlling tty */ 119 S_CTTYREF = 0x02, /* vnode ref taken by cttyopen */ 120 }); 121 #define SESSION_REF_BITS 4 /* 2 is enough, 4 is easier in hex */ 122 #define SESSION_REF_MASK ((1u << PGRP_REF_BITS) - 1) 123 124 #define SESSION_NULL ((struct session *)NULL) 125 126 /*! 127 * @struct session 128 * 129 * @brief 130 * Structure to keep track of process sessions 131 * 132 * @discussion 133 * Sessions hang (with +1's) from: 134 * - process groups (@c pgrp::pg_session) 135 * - ttys (@c tty::t_session) 136 * 137 * Lock ordering: TTYL > LL > SL 138 */ 139 struct session { 140 lck_mtx_t s_mlock; /* session lock */ 141 LIST_ENTRY(session) s_hash; /* (LL) hash linkage */ 142 struct proc *s_leader; /* (C) session leader */ 143 struct vnode *s_ttyvp; /* (SL) Vnode of controlling terminal */ 144 struct tty *s_ttyp; /* (SL) Controlling terminal */ 145 uint32_t s_ttyvid; /* (SL) Vnode id of the controlling terminal */ 146 pid_t s_ttypgrpid; /* (SL) tty's pgrp id */ 147 dev_t _Atomic s_ttydev; /* (SL) tty's device */ 148 pid_t s_sid; /* (C) Session ID */ 149 os_ref_atomic_t s_refcount; 150 char s_login[MAXLOGNAME]; /* (SL) Setlogin() name */ 151 }; 152 153 154 /* 155 * Flags for pg_refcnt 156 */ 157 __options_decl(pggrp_ref_bits_t, uint32_t, { 158 PGRP_REF_NONE = 0x00, 159 PGRP_REF_EMPTY = 0x01, /* the process group has no members */ 160 }); 161 #define PGRP_REF_BITS 1 162 #define PGRP_REF_MASK ((1u << PGRP_REF_BITS) - 1) 163 164 SMR_POINTER_DECL(pgrp_smr, struct pgrp *); 165 #define PGRP_NULL ((struct pgrp *)NULL) 166 167 /*! 168 * @struct pgrp 169 * 170 * @abstract 171 * Describes a process group membership. 172 * 173 * @discussion 174 * <b>locking rules</b> 175 * 176 * Process groups have a static ID (@c pg_id) and session (@c pg_session), 177 * and groups hold a reference on their session. 178 * 179 * Process group membership is protected by the @c pgrp_lock(). 180 * 181 * Lock ordering: TTYL > LL > PGL 182 * 183 * <b>lifetime</b> 184 * Process groups are refcounted, with a packed bit that tracks whether 185 * the group is orphaned (has no members), which prevents it 186 * from being looked up. 187 * 188 * Process groups are retired through @c smr_global_retire(). 189 * 190 * Process groups are hashed in a global hash table that can be consulted 191 * while holding the @c proc_list_lock() with @c pghash_find_locked() 192 * or using hazard pointers with @c pgrp_find(). 193 */ 194 struct pgrp { 195 lck_mtx_t pg_mlock; /* process group lock (PGL) */ 196 struct pgrp_smr pg_hash; /* hash chain (PLL) */ 197 LIST_HEAD(, proc) pg_members; /* group members (PGL) */ 198 struct session *pg_session; /* session (static) */ 199 pid_t pg_id; /* group ID (static) */ 200 int pg_jobc; /* # procs qualifying pgrp for job control (PGL) */ 201 os_ref_atomic_t pg_refcount; 202 os_ref_atomic_t pg_hashref; 203 }; 204 205 206 __options_decl(proc_ref_bits_t, uint32_t, { 207 P_REF_NONE = 0x00u, 208 P_REF_NEW = 0x01u, /* the proc is being initialized */ 209 P_REF_DEAD = 0x02u, /* the proc is becoming a zombie */ 210 P_REF_WILL_EXEC = 0x04u, /* see proc_refdrain_will_exec() */ 211 P_REF_IN_EXEC = 0x08u, /* see proc_refdrain_will_exec() */ 212 P_REF_DRAINING = 0x10u, /* someone is in proc_refdrain() */ 213 P_REF_SHADOW = 0x20u, /* the proc is shadow proc in exec */ 214 P_REF_PROC_HOLD = 0x40u, /* the proc has ref on the proc task combined struct */ 215 P_REF_TASK_HOLD = 0x80u, /* the task has ref on the proc task combined struct */ 216 }); 217 #define P_REF_BITS 8 218 #define P_REF_MASK ((1u << P_REF_BITS) - 1) 219 220 /* 221 * Kernel signal definitions and data structures, 222 * not exported to user programs. 223 */ 224 struct sigacts; 225 226 struct sigacts_ro { 227 /* 228 * We don't use element zero, so alias it with the backref pointer. 229 * This keeps the struct a reasonable size (512) instead of causing 230 * fragmentation. 231 */ 232 union { 233 struct sigacts *ps_rw; 234 user_addr_t ps_sigact[NSIG]; /* disposition of signals */ 235 }; 236 user_addr_t ps_trampact[NSIG]; /* disposition of signals */ 237 }; 238 239 /* 240 * Process signal actions and state, needed only within the process 241 * (not necessarily resident). 242 */ 243 struct sigacts { 244 struct sigacts_ro *ps_ro; 245 sigset_t ps_catchmask[NSIG]; /* signals to be blocked */ 246 sigset_t ps_sigonstack; /* signals to take on sigstack */ 247 sigset_t ps_sigintr; /* signals that interrupt syscalls */ 248 sigset_t ps_sigreset; /* signals that reset when caught */ 249 sigset_t ps_signodefer; /* signals not masked while handled */ 250 sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */ 251 sigset_t ps_oldmask; /* saved mask from before sigpause */ 252 _Atomic uint32_t ps_sigreturn_validation; /* sigreturn argument validation state */ 253 int ps_flags; /* signal flags, below */ 254 int ps_sig; /* for core dump/debugger XXX */ 255 int ps_code; /* for core dump/debugger XXX */ 256 int ps_addr; /* for core dump/debugger XXX */ 257 }; 258 259 SMR_POINTER_DECL(proc_smr, struct proc *); 260 #define PROC_NULL ((struct proc *)NULL) 261 262 /* 263 * Description of a process. 264 * 265 * This structure contains the information needed to manage a thread of 266 * control, known in UN*X as a process; it has references to substructures 267 * containing descriptions of things that the process uses, but may share 268 * with related processes. The process structure and the substructures 269 * are always addressible except for those marked "(PROC ONLY)" below, 270 * which might be addressible only on a processor on which the process 271 * is running. 272 */ 273 struct proc { 274 LIST_ENTRY(proc) p_list; /* List of all processes. */ 275 276 struct proc * XNU_PTRAUTH_SIGNED_PTR("proc.p_pptr") p_pptr; /* Pointer to parent process.(LL) */ 277 proc_ro_t p_proc_ro; 278 pid_t p_ppid; /* process's parent pid number */ 279 pid_t p_original_ppid; /* process's original parent pid number, doesn't change if reparented */ 280 pid_t p_pgrpid; /* process group id of the process (LL)*/ 281 uid_t p_uid; 282 gid_t p_gid; 283 uid_t p_ruid; 284 gid_t p_rgid; 285 uid_t p_svuid; 286 gid_t p_svgid; 287 pid_t p_sessionid; 288 uint64_t p_puniqueid; /* parent's unique ID - set on fork/spawn, doesn't change if reparented. */ 289 290 lck_mtx_t p_mlock; /* mutex lock for proc */ 291 pid_t p_pid; /* Process identifier for proc_find. (static)*/ 292 char p_stat; /* S* process status. (PL)*/ 293 char p_shutdownstate; 294 char p_kdebug; /* P_KDEBUG eq (CC)*/ 295 char p_btrace; /* P_BTRACE eq (CC)*/ 296 297 LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp (PGL) */ 298 LIST_ENTRY(proc) p_sibling; /* List of sibling processes (LL)*/ 299 LIST_HEAD(, proc) p_children; /* Pointer to list of children (LL)*/ 300 TAILQ_HEAD(, uthread) p_uthlist; /* List of uthreads (PL) */ 301 302 struct proc_smr p_hash; /* Hash chain (LL)*/ 303 304 #if CONFIG_PERSONAS 305 struct persona *p_persona; 306 LIST_ENTRY(proc) p_persona_list; 307 #endif 308 309 lck_mtx_t p_ucred_mlock; /* mutex lock to protect p_ucred */ 310 311 /* substructures: */ 312 struct filedesc p_fd; /* open files structure */ 313 struct pstats *p_stats; /* Accounting/statistics (PL) */ 314 SMR_POINTER(struct plimit *) p_limit;/* Process limits (PL) */ 315 SMR_POINTER(struct pgrp *XNU_PTRAUTH_SIGNED_PTR("proc.p_pgrp")) p_pgrp; /* Pointer to process group. (LL) */ 316 317 struct sigacts p_sigacts; 318 lck_spin_t p_slock; /* spin lock for itimer/profil protection */ 319 320 int p_siglist; /* signals captured back from threads */ 321 unsigned int p_flag; /* P_* flags. (atomic bit ops) */ 322 unsigned int p_lflag; /* local flags (PL) */ 323 unsigned int p_listflag; /* list flags (LL) */ 324 unsigned int p_ladvflag; /* local adv flags (atomic) */ 325 os_ref_atomic_t p_refcount; /* number of outstanding users */ 326 os_ref_atomic_t p_waitref; /* number of users pending transition */ 327 int p_childrencnt; /* children holding ref on parent (LL) */ 328 int p_parentref; /* children lookup ref on parent (LL) */ 329 pid_t p_oppid; /* Save parent pid during ptrace. XXX */ 330 u_int p_xstat; /* Exit status for wait; also stop signal. */ 331 int p_aio_total_count; /* all allocated AIO requests for this proc */ 332 333 #ifdef _PROC_HAS_SCHEDINFO_ 334 /* may need cleanup, not used */ 335 u_int p_estcpu; /* Time averaged value of p_cpticks.(used by aio and proc_comapre) */ 336 fixpt_t p_pctcpu; /* %cpu for this process during p_swtime (used by aio)*/ 337 u_int p_slptime; /* used by proc_compare */ 338 #endif /* _PROC_HAS_SCHEDINFO_ */ 339 340 struct itimerval p_realtimer; /* Alarm timer. (PSL) */ 341 struct timeval p_rtime; /* Real time.(PSL) */ 342 struct itimerval p_vtimer_user; /* Virtual timers.(PSL) */ 343 struct itimerval p_vtimer_prof; /* (PSL) */ 344 345 struct timeval p_rlim_cpu; /* Remaining rlim cpu value.(PSL) */ 346 int p_debugger; /* NU 1: can exec set-bit programs if suser */ 347 boolean_t sigwait; /* indication to suspend (PL) */ 348 void *sigwait_thread; /* 'thread' holding sigwait(PL) */ 349 void *exit_thread; /* Which thread is exiting(PL) */ 350 /* Following fields are info from SIGCHLD (PL) */ 351 pid_t si_pid; /* (PL) */ 352 u_int si_status; /* (PL) */ 353 u_int si_code; /* (PL) */ 354 uid_t si_uid; /* (PL) */ 355 356 void * vm_shm; /* (SYSV SHM Lock) for sysV shared memory */ 357 int p_ractive; 358 /* cached proc-specific data required for corpse inspection */ 359 pid_t p_responsible_pid; /* pid resonsible for this process */ 360 361 #if CONFIG_DTRACE 362 int p_dtrace_probes; /* (PL) are there probes for this proc? */ 363 u_int p_dtrace_count; /* (sprlock) number of DTrace tracepoints */ 364 uint8_t p_dtrace_stop; /* indicates a DTrace-desired stop */ 365 user_addr_t p_dtrace_argv; /* (write once, read only after that) */ 366 user_addr_t p_dtrace_envp; /* (write once, read only after that) */ 367 lck_mtx_t p_dtrace_sprlock; /* sun proc lock emulation */ 368 struct dtrace_ptss_page* p_dtrace_ptss_pages; /* (sprlock) list of user ptss pages */ 369 struct dtrace_ptss_page_entry* p_dtrace_ptss_free_list; /* (atomic) list of individual ptss entries */ 370 struct dtrace_helpers* p_dtrace_helpers; /* (dtrace_lock) DTrace per-proc private */ 371 struct dof_ioctl_data* p_dtrace_lazy_dofs; /* (sprlock) unloaded dof_helper_t's */ 372 #endif /* CONFIG_DTRACE */ 373 374 __xnu_struct_group(proc_forkcopy_data, p_forkcopy, { 375 u_int p_argslen; /* Length of process arguments. */ 376 int p_argc; /* saved argc for sysctl_procargs() */ 377 user_addr_t user_stack; /* where user stack was allocated */ 378 struct vnode * XNU_PTRAUTH_SIGNED_PTR("proc.p_textvp") p_textvp; /* Vnode of executable. */ 379 off_t p_textoff; /* offset in executable vnode */ 380 381 sigset_t p_sigmask; /* DEPRECATED */ 382 sigset_t p_sigignore; /* Signals being ignored. (PL) */ 383 sigset_t p_sigcatch; /* Signals being caught by user.(PL) */ 384 385 u_char p_priority; /* (NU) Process priority. */ 386 u_char p_resv0; /* (NU) User-priority based on p_cpu and p_nice. */ 387 char p_nice; /* Process "nice" value.(PL) */ 388 u_char p_resv1; /* (NU) User-priority based on p_cpu and p_nice. */ 389 390 // types currently in sys/param.h 391 command_t p_comm; 392 proc_name_t p_name; /* can be changed by the process */ 393 uint8_t p_xhighbits; /* Stores the top byte of exit status to avoid truncation*/ 394 pid_t p_contproc; /* last PID to send us a SIGCONT (PL) */ 395 396 uint32_t p_pcaction; /* action for process control on starvation */ 397 uint8_t p_uuid[16]; /* from LC_UUID load command */ 398 399 /* 400 * CPU type and subtype of binary slice executed in 401 * this process. Protected by proc lock. 402 */ 403 cpu_type_t p_cputype; 404 cpu_subtype_t p_cpusubtype; 405 }); 406 407 TAILQ_HEAD(, aio_workq_entry ) p_aio_activeq; /* active async IO requests */ 408 TAILQ_HEAD(, aio_workq_entry ) p_aio_doneq; /* completed async IO requests */ 409 410 struct klist p_klist; /* knote list (PL ?)*/ 411 412 struct rusage_superset *p_ru; /* Exit information. (PL) */ 413 thread_t p_signalholder; 414 thread_t p_transholder; 415 int p_sigwaitcnt; 416 /* DEPRECATE following field */ 417 u_short p_acflag; /* Accounting flags. */ 418 volatile u_short p_vfs_iopolicy; /* VFS iopolicy flags. (atomic bit ops) */ 419 420 user_addr_t p_threadstart; /* pthread start fn */ 421 user_addr_t p_wqthread; /* pthread workqueue fn */ 422 int p_pthsize; /* pthread size */ 423 uint32_t p_pth_tsd_offset; /* offset from pthread_t to TSD for new threads */ 424 user_addr_t p_stack_addr_hint; /* stack allocation hint for wq threads */ 425 struct workqueue *_Atomic p_wqptr; /* workq ptr */ 426 427 struct timeval p_start; /* starting time */ 428 void * p_rcall; 429 void * p_pthhash; /* pthread waitqueue hash */ 430 volatile uint64_t was_throttled __attribute__((aligned(8))); /* Counter for number of throttled I/Os */ 431 volatile uint64_t did_throttle __attribute__((aligned(8))); /* Counter for number of I/Os this proc throttled */ 432 433 #if DIAGNOSTIC 434 unsigned int p_fdlock_pc[4]; 435 unsigned int p_fdunlock_pc[4]; 436 #if SIGNAL_DEBUG 437 unsigned int lockpc[8]; 438 unsigned int unlockpc[8]; 439 #endif /* SIGNAL_DEBUG */ 440 #endif /* DIAGNOSTIC */ 441 uint64_t p_dispatchqueue_offset; 442 uint64_t p_dispatchqueue_serialno_offset; 443 uint64_t p_dispatchqueue_label_offset; 444 uint64_t p_return_to_kernel_offset; 445 uint64_t p_mach_thread_self_offset; 446 /* The offset is set to 0 if userspace is not requesting for this feature */ 447 uint64_t p_pthread_wq_quantum_offset; 448 #if VM_PRESSURE_EVENTS 449 struct timeval vm_pressure_last_notify_tstamp; 450 #endif 451 uint8_t p_crash_behavior; /* bit fields to control behavior on crash. See spawn.h POSIX_SPAWN_PANIC* */ 452 bool p_posix_spawn_failed; /* indicates that a posix_spawn failed */ 453 bool p_disallow_map_with_linking; /* used to prevent dyld's map_with_linking() usage after startup */ 454 455 #if CONFIG_MEMORYSTATUS 456 #if CONFIG_FREEZE 457 uint8_t p_memstat_freeze_skip_reason; /* memorystaus_freeze_skipped_reason_t. Protected by the freezer mutex. */ 458 #endif /* CONFIG_FREEZE */ 459 /* Fields protected by proc list lock */ 460 uint32_t p_memstat_state; /* state. Also used as a wakeup channel when the memstat's LOCKED bit changes */ 461 int32_t p_memstat_effectivepriority; /* priority after transaction state accounted for */ 462 int32_t p_memstat_requestedpriority; /* active priority */ 463 int32_t p_memstat_assertionpriority; /* assertion driven priority */ 464 uint32_t p_memstat_dirty; /* dirty state */ 465 TAILQ_ENTRY(proc) p_memstat_list; /* priority bucket link */ 466 uint64_t p_memstat_userdata; /* user state */ 467 uint64_t p_memstat_idledeadline; /* time at which process became clean */ 468 uint64_t p_memstat_idle_start; /* abstime process transitions into the idle band */ 469 uint64_t p_memstat_idle_delta; /* abstime delta spent in idle band */ 470 int32_t p_memstat_memlimit; /* cached memory limit, toggles between active and inactive limits */ 471 int32_t p_memstat_memlimit_active; /* memory limit enforced when process is in active jetsam state */ 472 int32_t p_memstat_memlimit_inactive; /* memory limit enforced when process is in inactive jetsam state */ 473 int32_t p_memstat_relaunch_flags; /* flags indicating relaunch behavior for the process */ 474 #if CONFIG_FREEZE 475 uint32_t p_memstat_freeze_sharedanon_pages; /* shared pages left behind after freeze */ 476 uint32_t p_memstat_frozen_count; 477 uint32_t p_memstat_thaw_count; 478 uint32_t p_memstat_last_thaw_interval; /* In which freezer interval was this last thawed? */ 479 #endif /* CONFIG_FREEZE */ 480 #endif /* CONFIG_MEMORYSTATUS */ 481 482 _Atomic uint32_t p_user_faults; /* count the number of user faults generated */ 483 484 uint32_t p_memlimit_increase; /* byte increase for memory limit for dyld SPI rdar://problem/49950264, structure packing 32-bit and 64-bit */ 485 486 uint64_t p_crash_behavior_deadline; /* mach_continuous_time deadline. After this timestamp p_crash_behavior is invalid */ 487 488 uint32_t p_crash_count; /* Consecutive crash count threshold */ 489 uint32_t p_throttle_timeout; /* Exponential backoff throttle */ 490 491 struct os_reason *p_exit_reason; 492 493 #if CONFIG_PROC_UDATA_STORAGE 494 uint64_t p_user_data; /* general-purpose storage for userland-provided data */ 495 #endif /* CONFIG_PROC_UDATA_STORAGE */ 496 497 char * p_subsystem_root_path; 498 }; 499 500 /* 501 * Identify a process uniquely. 502 * proc_ident's fields match 1-1 with those in struct proc. 503 */ 504 struct proc_ident { 505 uint64_t p_uniqueid; 506 pid_t p_pid; 507 int p_idversion; 508 }; 509 510 #define PGRPID_DEAD 0xdeaddead 511 512 /* p_listflag */ 513 #define P_LIST_WAITING 0x00000010 514 #define P_LIST_CHILDDRSTART 0x00000080 515 #define P_LIST_CHILDDRAINED 0x00000100 516 #define P_LIST_CHILDDRWAIT 0x00000200 517 #define P_LIST_CHILDLKWAIT 0x00000400 518 #define P_LIST_DEADPARENT 0x00000800 519 #define P_LIST_PARENTREFWAIT 0x00001000 520 #define P_LIST_EXITCOUNT 0x00100000 /* counted for process exit */ 521 522 /* local flags */ 523 #define P_LDELAYTERM 0x00000001 /* */ 524 #define P_LHASTASK 0x00000002 /* process points to a task */ 525 #define P_LTERM 0x00000004 /* */ 526 #define P_LEXIT 0x00000008 /* */ 527 #define P_LPEXIT 0x00000010 528 #define P_LTRANSCOMMIT 0x00000020 /* process is committed to trans */ 529 #define P_LINTRANSIT 0x00000040 /* process in exec or in creation */ 530 #define P_LTRANSWAIT 0x00000080 /* waiting for trans to complete */ 531 #define P_LTRACED 0x00000400 /* */ 532 #define P_LSIGEXC 0x00000800 /* */ 533 #define P_LNOATTACH 0x00001000 /* */ 534 #define P_LPPWAIT 0x00002000 /* */ 535 #define P_LPTHREADJITALLOWLIST 0x00004000 /* process has pthread JIT write function allowlist */ 536 #define P_LPTHREADJITFREEZELATE 0x00008000 /* process JIT function allowlist is frozen late */ 537 #define P_LTRACE_WAIT 0x00010000 /* wait for flag to be cleared before starting ptrace */ 538 #define P_LLIMCHANGE 0x00020000 /* process is changing its plimit (rlim_cur, rlim_max) */ 539 #define P_LLIMWAIT 0x00040000 540 #define P_LWAITED 0x00080000 541 #define P_LINSIGNAL 0x00100000 542 #define P_LCUSTOM_STACK 0x00200000 /* process is using custom stack size */ 543 #define P_LRAGE_VNODES 0x00400000 544 #define P_LREGISTER 0x00800000 /* thread start fns registered */ 545 #define P_LVMRSRCOWNER 0x01000000 /* can handle the resource ownership of */ 546 #define P_LTERM_DECRYPTFAIL 0x04000000 /* process terminating due to key failure to decrypt */ 547 #define P_LTERM_JETSAM 0x08000000 /* process is being jetsam'd */ 548 549 #define P_JETSAM_VMPAGESHORTAGE 0x00000000 /* jetsam: lowest jetsam priority proc, killed due to vm page shortage */ 550 #define P_JETSAM_VMTHRASHING 0x10000000 /* jetsam: lowest jetsam priority proc, killed due to vm thrashing */ 551 #define P_JETSAM_HIWAT 0x20000000 /* jetsam: high water mark */ 552 #define P_JETSAM_PID 0x30000000 /* jetsam: pid */ 553 #define P_JETSAM_IDLEEXIT 0x40000000 /* jetsam: idle exit */ 554 #define P_JETSAM_VNODE 0x50000000 /* jetsam: vnode kill */ 555 #define P_JETSAM_FCTHRASHING 0x60000000 /* jetsam: lowest jetsam priority proc, killed due to filecache thrashing */ 556 #define P_JETSAM_MASK 0x70000000 /* jetsam type mask */ 557 #define P_LNSPACE_RESOLVER 0x80000000 /* process is the namespace resolver */ 558 559 /* Process control state for resource starvation */ 560 #define P_PCTHROTTLE 1 561 #define P_PCSUSP 2 562 #define P_PCKILL 3 563 #define P_PCMAX 3 564 565 /* Process control action state on resrouce starvation */ 566 #define PROC_ACTION_MASK 0xffff0000; 567 #define PROC_CONTROL_STATE(p) (p->p_pcaction & P_PCMAX) 568 #define PROC_ACTION_STATE(p) ((p->p_pcaction >> 16) & P_PCMAX) 569 #define PROC_SETACTION_STATE(p) (p->p_pcaction = (PROC_CONTROL_STATE(p) | (PROC_CONTROL_STATE(p) << 16))) 570 #define PROC_RESETACTION_STATE(p) (p->p_pcaction = PROC_CONTROL_STATE(p)) 571 572 /* Process exit reason macros */ 573 #define PROC_HAS_EXITREASON(p) (p->p_exit_reason != OS_REASON_NULL) 574 #define PROC_EXITREASON_FLAGS(p) p->p_exit_reason->osr_flags 575 576 /* additional process flags */ 577 #define P_LADVLOCK 0x01 578 #define P_LXBKIDLEINPROG 0x02 579 #define P_RSR 0x04 580 581 /* p_vfs_iopolicy flags */ 582 #define P_VFS_IOPOLICY_FORCE_HFS_CASE_SENSITIVITY 0x0001 583 #define P_VFS_IOPOLICY_ATIME_UPDATES 0x0002 584 #define P_VFS_IOPOLICY_MATERIALIZE_DATALESS_FILES 0x0004 585 #define P_VFS_IOPOLICY_STATFS_NO_DATA_VOLUME 0x0008 586 #define P_VFS_IOPOLICY_TRIGGER_RESOLVE_DISABLE 0x0010 587 #define P_VFS_IOPOLICY_IGNORE_CONTENT_PROTECTION 0x0020 588 #define P_VFS_IOPOLICY_IGNORE_NODE_PERMISSIONS 0x0040 589 #define P_VFS_IOPOLICY_SKIP_MTIME_UPDATE 0x0080 590 #define P_VFS_IOPOLICY_ALLOW_LOW_SPACE_WRITES 0x0100 591 #define P_VFS_IOPOLICY_DISALLOW_RW_FOR_O_EVTONLY 0x0200 592 #define P_VFS_IOPOLICY_ALTLINK 0x0400 593 #define P_VFS_IOPOLICY_VALID_MASK \ 594 (P_VFS_IOPOLICY_FORCE_HFS_CASE_SENSITIVITY | \ 595 P_VFS_IOPOLICY_ATIME_UPDATES | \ 596 P_VFS_IOPOLICY_MATERIALIZE_DATALESS_FILES | \ 597 P_VFS_IOPOLICY_STATFS_NO_DATA_VOLUME | \ 598 P_VFS_IOPOLICY_TRIGGER_RESOLVE_DISABLE | \ 599 P_VFS_IOPOLICY_IGNORE_CONTENT_PROTECTION | \ 600 P_VFS_IOPOLICY_IGNORE_NODE_PERMISSIONS | \ 601 P_VFS_IOPOLICY_SKIP_MTIME_UPDATE | \ 602 P_VFS_IOPOLICY_ALLOW_LOW_SPACE_WRITES | \ 603 P_VFS_IOPOLICY_DISALLOW_RW_FOR_O_EVTONLY | \ 604 P_VFS_IOPOLICY_ALTLINK) 605 606 /* process creation arguments */ 607 #define PROC_CREATE_FORK 0 /* independent child (running) */ 608 #define PROC_CREATE_SPAWN 1 /* independent child (suspended) */ 609 610 /* LP64 version of extern_proc. all pointers 611 * grow when we're dealing with a 64-bit process. 612 * WARNING - keep in sync with extern_proc 613 * but use native alignment of 64-bit process. 614 */ 615 616 #ifdef KERNEL 617 #include <sys/time.h> /* user_timeval, user_itimerval */ 618 619 /* 620 * This packing is required to ensure symmetry between userspace and kernelspace 621 * when the kernel is 64-bit and the user application is 32-bit. All currently 622 * supported ARM slices (arm64/armv7k/arm64_32) contain the same struct 623 * alignment ABI so this packing isn't needed for ARM. 624 */ 625 #if defined(__x86_64__) 626 #pragma pack(4) 627 #endif 628 struct user32_extern_proc { 629 union { 630 struct { 631 uint32_t __p_forw; /* Doubly-linked run/sleep queue. */ 632 uint32_t __p_back; 633 } p_st1; 634 struct user32_timeval __p_starttime; /* process start time */ 635 } p_un; 636 uint32_t p_vmspace; /* Address space. */ 637 uint32_t p_sigacts; /* Signal actions, state (PROC ONLY). */ 638 int p_flag; /* P_* flags. */ 639 char p_stat; /* S* process status. */ 640 pid_t p_pid; /* Process identifier. */ 641 pid_t p_oppid; /* Save parent pid during ptrace. XXX */ 642 int p_dupfd; /* Sideways return value from fdopen. XXX */ 643 /* Mach related */ 644 uint32_t user_stack; /* where user stack was allocated */ 645 uint32_t exit_thread; /* XXX Which thread is exiting? */ 646 int p_debugger; /* allow to debug */ 647 boolean_t sigwait; /* indication to suspend */ 648 /* scheduling */ 649 u_int p_estcpu; /* Time averaged value of p_cpticks. */ 650 int p_cpticks; /* Ticks of cpu time. */ 651 fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */ 652 uint32_t p_wchan; /* Sleep address. */ 653 uint32_t p_wmesg; /* Reason for sleep. */ 654 u_int p_swtime; /* Time swapped in or out. */ 655 u_int p_slptime; /* Time since last blocked. */ 656 struct user32_itimerval p_realtimer; /* Alarm timer. */ 657 struct user32_timeval p_rtime; /* Real time. */ 658 u_quad_t p_uticks; /* Statclock hits in user mode. */ 659 u_quad_t p_sticks; /* Statclock hits in system mode. */ 660 u_quad_t p_iticks; /* Statclock hits processing intr. */ 661 int p_traceflag; /* Kernel trace points. */ 662 uint32_t p_tracep; /* Trace to vnode. */ 663 int p_siglist; /* DEPRECATED */ 664 uint32_t p_textvp; /* Vnode of executable. */ 665 int p_holdcnt; /* If non-zero, don't swap. */ 666 sigset_t p_sigmask; /* DEPRECATED. */ 667 sigset_t p_sigignore; /* Signals being ignored. */ 668 sigset_t p_sigcatch; /* Signals being caught by user. */ 669 u_char p_priority; /* Process priority. */ 670 u_char p_usrpri; /* User-priority based on p_cpu and p_nice. */ 671 char p_nice; /* Process "nice" value. */ 672 char p_comm[MAXCOMLEN + 1]; 673 uint32_t p_pgrp; /* Pointer to process group. */ 674 uint32_t p_addr; /* Kernel virtual addr of u-area (PROC ONLY). */ 675 u_short p_xstat; /* Exit status for wait; also stop signal. */ 676 u_short p_acflag; /* Accounting flags. */ 677 uint32_t p_ru; /* Exit information. XXX */ 678 }; 679 #pragma pack() 680 struct user64_extern_proc { 681 union { 682 struct { 683 user_addr_t __p_forw; /* Doubly-linked run/sleep queue. */ 684 user_addr_t __p_back; 685 } p_st1; 686 struct user64_timeval __p_starttime; /* process start time */ 687 } p_un; 688 user_addr_t p_vmspace; /* Address space. */ 689 user_addr_t p_sigacts; /* Signal actions, state (PROC ONLY). */ 690 int p_flag; /* P_* flags. */ 691 char p_stat; /* S* process status. */ 692 pid_t p_pid; /* Process identifier. */ 693 pid_t p_oppid; /* Save parent pid during ptrace. XXX */ 694 int p_dupfd; /* Sideways return value from fdopen. XXX */ 695 /* Mach related */ 696 user_addr_t user_stack __attribute((aligned(8))); /* where user stack was allocated */ 697 user_addr_t exit_thread; /* XXX Which thread is exiting? */ 698 int p_debugger; /* allow to debug */ 699 boolean_t sigwait; /* indication to suspend */ 700 /* scheduling */ 701 u_int p_estcpu; /* Time averaged value of p_cpticks. */ 702 int p_cpticks; /* Ticks of cpu time. */ 703 fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */ 704 user_addr_t p_wchan __attribute((aligned(8))); /* Sleep address. */ 705 user_addr_t p_wmesg; /* Reason for sleep. */ 706 u_int p_swtime; /* Time swapped in or out. */ 707 u_int p_slptime; /* Time since last blocked. */ 708 struct user64_itimerval p_realtimer; /* Alarm timer. */ 709 struct user64_timeval p_rtime; /* Real time. */ 710 u_quad_t p_uticks; /* Statclock hits in user mode. */ 711 u_quad_t p_sticks; /* Statclock hits in system mode. */ 712 u_quad_t p_iticks; /* Statclock hits processing intr. */ 713 int p_traceflag; /* Kernel trace points. */ 714 user_addr_t p_tracep __attribute((aligned(8))); /* Trace to vnode. */ 715 int p_siglist; /* DEPRECATED */ 716 user_addr_t p_textvp __attribute((aligned(8))); /* Vnode of executable. */ 717 int p_holdcnt; /* If non-zero, don't swap. */ 718 sigset_t p_sigmask; /* DEPRECATED. */ 719 sigset_t p_sigignore; /* Signals being ignored. */ 720 sigset_t p_sigcatch; /* Signals being caught by user. */ 721 u_char p_priority; /* Process priority. */ 722 u_char p_usrpri; /* User-priority based on p_cpu and p_nice. */ 723 char p_nice; /* Process "nice" value. */ 724 char p_comm[MAXCOMLEN + 1]; 725 user_addr_t p_pgrp __attribute((aligned(8))); /* Pointer to process group. */ 726 user_addr_t p_addr; /* Kernel virtual addr of u-area (PROC ONLY). */ 727 u_short p_xstat; /* Exit status for wait; also stop signal. */ 728 u_short p_acflag; /* Accounting flags. */ 729 user_addr_t p_ru __attribute((aligned(8))); /* Exit information. XXX */ 730 }; 731 #endif /* KERNEL */ 732 733 #pragma GCC visibility push(hidden) 734 735 extern struct vfs_context vfs_context0; 736 737 /* 738 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t, 739 * as it is used to represent "no process group". 740 */ 741 extern int nprocs, maxproc; /* Current and max number of procs. */ 742 extern int maxprocperuid; /* Current number of procs per uid */ 743 extern int hard_maxproc; /* hard limit */ 744 extern unsigned int proc_shutdown_exitcount; 745 746 #define PID_MAX 99999 747 #define NO_PID 100000 748 extern lck_mtx_t proc_list_mlock; 749 750 #define BSD_SIMUL_EXECS 33 /* 32 , allow for rounding */ 751 #define BSD_PAGEABLE_SIZE_PER_EXEC (NCARGS + PAGE_SIZE + PAGE_SIZE) /* page for apple vars, page for executable header */ 752 extern int execargs_cache_size; 753 extern int execargs_free_count; 754 extern vm_offset_t * execargs_cache; 755 756 #define SESS_LEADER(p, sessp) ((sessp)->s_leader == (p)) 757 758 #define SESSHASH(sessid) (&sesshashtbl[(sessid) & sesshash]) 759 extern LIST_HEAD(sesshashhead, session) * sesshashtbl; 760 extern u_long sesshash; 761 762 extern lck_attr_t proc_lck_attr; 763 extern lck_grp_t proc_fdmlock_grp; 764 extern lck_grp_t proc_lck_grp; 765 extern lck_grp_t proc_kqhashlock_grp; 766 extern lck_grp_t proc_knhashlock_grp; 767 extern lck_grp_t proc_slock_grp; 768 extern lck_grp_t proc_mlock_grp; 769 extern lck_grp_t proc_ucred_mlock_grp; 770 extern lck_grp_t proc_dirslock_grp; 771 772 LIST_HEAD(proclist, proc); 773 extern struct proclist allproc; /* List of all processes. */ 774 extern struct proclist zombproc; /* List of zombie processes. */ 775 776 #if CONFIG_COREDUMP 777 extern const char * defaultcorefiledir; 778 extern const char * defaultdrivercorefiledir; 779 extern char corefilename[MAXPATHLEN + 1]; 780 extern char drivercorefilename[MAXPATHLEN + 1]; 781 extern int do_coredump; 782 extern int sugid_coredump; 783 #endif 784 785 __options_decl(cloneproc_flags_t, uint32_t, { 786 CLONEPROC_FLAGS_NONE = 0, 787 CLONEPROC_FLAGS_INHERIT_MEMORY = 0x0001, 788 CLONEPROC_FLAGS_MEMSTAT_INTERNAL = 0x0002, 789 CLONEPROC_FLAGS_FOR_EXEC = 0x0004, 790 }); 791 792 extern thread_t cloneproc(task_t, coalition_t *, proc_t, cloneproc_flags_t); 793 extern struct proc * XNU_PTRAUTH_SIGNED_PTR("initproc") initproc; 794 extern void proc_lock(struct proc *); 795 extern void proc_unlock(struct proc *); 796 extern void proc_spinlock(struct proc *); 797 extern void proc_spinunlock(struct proc *); 798 extern void proc_list_lock(void); 799 extern void proc_list_unlock(void); 800 extern void proc_klist_lock(void); 801 extern void proc_klist_unlock(void); 802 extern void proc_fdlock(struct proc *); 803 extern void proc_fdlock_spin(struct proc *); 804 extern void proc_fdunlock(struct proc *); 805 extern void proc_fdlock_assert(proc_t p, int assertflags); 806 extern void proc_dirs_lock_shared(struct proc *); 807 extern void proc_dirs_unlock_shared(struct proc *); 808 extern void proc_dirs_lock_exclusive(struct proc *); 809 extern void proc_dirs_unlock_exclusive(struct proc *); 810 extern void proc_ucred_lock(struct proc *); 811 extern void proc_ucred_unlock(struct proc *); 812 extern void proc_update_creds_onproc(struct proc *); 813 #if CONFIG_COREDUMP 814 __private_extern__ int proc_core_name(const char *format, const char *name, uid_t uid, pid_t pid, 815 char *cr_name, size_t cr_name_len); 816 #endif 817 extern int isinferior(struct proc *, struct proc *); 818 __private_extern__ struct proc *pzfind(pid_t); /* Find zombie by id. */ 819 __private_extern__ struct proc *proc_find_zombref(pid_t); /* Find zombie by id. */ 820 __private_extern__ void proc_drop_zombref(struct proc * p); /* Find zombie by id. */ 821 822 extern size_t chgproccnt(uid_t uid, int diff); 823 extern void pinsertchild(struct proc *parent, struct proc *child, bool in_exec); 824 extern void p_reparentallchildren(proc_t old_proc, proc_t new_proc); 825 extern int setsid_internal(struct proc *p); 826 #ifndef __cplusplus 827 extern void setlogin_internal(proc_t p, const char login[static MAXLOGNAME]); 828 #endif // __cplusplus 829 extern int setgroups_internal(proc_t p, u_int gidsetsize, gid_t *gidset, uid_t gmuid); 830 extern int enterpgrp(struct proc *p, pid_t pgid, int mksess); 831 extern void fixjobc(struct proc *p, struct pgrp *pgrp, int entering); 832 extern int inferior(struct proc *p); 833 extern void resetpriority(struct proc *); 834 extern void setrunnable(struct proc *); 835 extern void setrunqueue(struct proc *); 836 extern int sleep(void *chan, int pri) __exported; 837 extern int tsleep0(void *chan, int pri, const char *wmesg, int timo, int (*continuation)(int)); 838 extern int tsleep1(void *chan, int pri, const char *wmesg, u_int64_t abstime, int (*continuation)(int)); 839 extern int exit1(struct proc *, int, int *); 840 extern int exit1_internal(struct proc *, int, int *, boolean_t, boolean_t, int); 841 extern int exit_with_reason(struct proc *, int, int *, boolean_t, boolean_t, int, struct os_reason *); 842 extern int fork1(proc_t, thread_t *, int, coalition_t *); 843 extern void proc_reparentlocked(struct proc *child, struct proc * newparent, int cansignal, int locked); 844 845 extern bool proc_list_exited(proc_t p); 846 extern proc_t proc_find_locked(int pid); 847 extern bool proc_is_shadow(proc_t p); 848 extern proc_t proc_findthread(thread_t thread); 849 extern void proc_refdrain(proc_t); 850 extern proc_t proc_refdrain_will_exec(proc_t p); 851 extern void proc_refwake_did_exec(proc_t p); 852 extern void proc_childdrainlocked(proc_t); 853 extern void proc_childdrainstart(proc_t); 854 extern void proc_childdrainend(proc_t); 855 extern void proc_checkdeadrefs(proc_t); 856 struct proc *phash_find_locked(pid_t); 857 extern void phash_insert_locked(pid_t pid, struct proc *); 858 extern void phash_remove_locked(pid_t pid, struct proc *); 859 extern void phash_replace_locked(pid_t pid, struct proc *old_proc, struct proc *new_proc); 860 struct pgrp *pghash_find_locked(pid_t); 861 extern void pghash_insert_locked(pid_t pgid, struct pgrp *); 862 extern struct pgrp *pgrp_find(pid_t); 863 extern void pgrp_rele(struct pgrp * pgrp); 864 extern struct session * session_find_internal(pid_t sessid); 865 extern struct pgrp *proc_pgrp(proc_t, struct session **); 866 extern struct pgrp *pgrp_leave_locked(struct proc *p); 867 extern struct pgrp *pgrp_enter_locked(struct proc *parent, struct proc *p); 868 extern struct pgrp *tty_pgrp_locked(struct tty * tp); 869 struct pgrp *pgrp_alloc(pid_t pgid, pggrp_ref_bits_t bits); 870 extern void pgrp_lock(struct pgrp * pgrp); 871 extern void pgrp_unlock(struct pgrp * pgrp); 872 extern struct session *session_find_locked(pid_t sessid); 873 extern void session_replace_leader(struct proc *old_proc, struct proc *new_proc); 874 extern struct session *session_alloc(struct proc *leader); 875 extern void session_lock(struct session * sess); 876 extern void session_unlock(struct session * sess); 877 extern struct session *session_ref(struct session *sess); 878 extern void session_rele(struct session *sess); 879 extern struct tty *session_set_tty_locked(struct session *sessp, struct tty *); 880 extern struct tty *session_clear_tty_locked(struct session *sess); 881 extern struct tty *session_tty(struct session *sess); 882 extern proc_t proc_parentholdref(proc_t); 883 extern int proc_parentdropref(proc_t, int); 884 int itimerfix(struct timeval *tv); 885 int itimerdecr(struct proc * p, struct itimerval *itp, int usec); 886 void proc_free_realitimer(proc_t proc); 887 void proc_inherit_itimers(struct proc *old_proc, struct proc *new_proc); 888 int timespec_is_valid(const struct timespec *); 889 void proc_signalstart(struct proc *, int locked); 890 void proc_signalend(struct proc *, int locked); 891 int proc_transstart(struct proc *, int locked, int non_blocking); 892 void proc_transcommit(struct proc *, int locked); 893 void proc_transend(struct proc *, int locked); 894 int proc_transwait(struct proc *, int locked); 895 struct proc *proc_ref(struct proc *p, int locked); 896 void proc_wait_release(struct proc *p); 897 void proc_knote(struct proc * p, long hint); 898 void proc_transfer_knotes(struct proc *old_proc, struct proc *new_proc); 899 void proc_knote_drain(struct proc *p); 900 void proc_setregister(proc_t p); 901 void proc_resetregister(proc_t p); 902 bool proc_get_pthread_jit_allowlist(proc_t p, bool *late_out); 903 void proc_set_pthread_jit_allowlist(proc_t p, bool late); 904 /* returns the first thread_t in the process, or NULL XXX for NFS, DO NOT USE */ 905 thread_t proc_thread(proc_t); 906 extern int proc_pendingsignals(proc_t, sigset_t); 907 int proc_getpcontrol(int pid, int * pcontrolp); 908 int proc_dopcontrol(proc_t p); 909 int proc_resetpcontrol(int pid); 910 #if PSYNCH 911 void pth_proc_hashinit(proc_t); 912 void pth_proc_hashdelete(proc_t); 913 void pth_global_hashinit(void); 914 extern thread_call_t psynch_thcall; 915 void psynch_wq_cleanup(__unused void * param, __unused void * param1); 916 extern lck_mtx_t * pthread_list_mlock; 917 #endif /* PSYNCH */ 918 struct uthread *current_uthread(void) __pure2; 919 920 extern void proc_set_task(proc_t, task_t); 921 extern task_t proc_get_task_raw(proc_t proc); 922 extern proc_t task_get_proc_raw(task_t task); 923 extern void proc_ref_hold_proc_task_struct(proc_t proc); 924 extern void proc_release_proc_task_struct(proc_t proc); 925 extern void task_ref_hold_proc_task_struct(task_t task); 926 extern void task_release_proc_task_struct(task_t task); 927 extern void proc_setpidversion(proc_t, int); 928 extern uint64_t proc_getcsflags(proc_t); 929 extern void proc_csflags_update(proc_t, uint64_t); 930 extern void proc_csflags_set(proc_t, uint64_t); 931 extern void proc_csflags_clear(proc_t, uint64_t); 932 extern uint8_t *proc_syscall_filter_mask(proc_t); 933 extern void proc_syscall_filter_mask_set(proc_t, uint8_t *); 934 extern pid_t proc_getpid(proc_t); 935 extern void proc_setplatformdata(proc_t, uint32_t, uint32_t, uint32_t); 936 extern void proc_set_sigact(proc_t, int, user_addr_t); 937 extern void proc_set_trampact(proc_t, int, user_addr_t); 938 extern void proc_set_sigact_trampact(proc_t, int, user_addr_t, user_addr_t); 939 extern void proc_reset_sigact(proc_t, sigset_t); 940 extern void proc_sigacts_copy(proc_t dst, proc_t src); 941 extern void proc_set_ucred(proc_t, kauth_cred_t); 942 extern bool proc_update_label(proc_t p, bool setugid, kauth_cred_t (^update_cred)(kauth_cred_t)); 943 extern void proc_setexecutableuuid(proc_t, const uuid_t); 944 extern const unsigned char *proc_executableuuid_addr(proc_t); 945 946 #pragma mark - process iteration 947 948 /* 949 * ALLPROC_FOREACH cannot be used to access the task, as the field may be 950 * swapped out during exec. With `proc_iterate`, find threads by iterating the 951 * `p_uthlist` field of the proc, under the `proc_lock`. 952 */ 953 954 #define ALLPROC_FOREACH(var) \ 955 LIST_FOREACH((var), &allproc, p_list) 956 957 #define ZOMBPROC_FOREACH(var) \ 958 LIST_FOREACH((var), &zombproc, p_list) 959 960 #define PGMEMBERS_FOREACH(group, var) \ 961 LIST_FOREACH((var), &((struct pgrp *)(group))->pg_members, p_pglist) 962 963 #define PCHILDREN_FOREACH(parent, var) \ 964 LIST_FOREACH((var), &(((struct proc *)(parent))->p_children), p_sibling) 965 966 typedef int (*proc_iterate_fn_t)(proc_t, void *); 967 968 /* 969 * These are the only valid return values of `callout` functions provided to 970 * process iterators. 971 * 972 * CLAIMED returns expect the caller to call proc_rele on the proc. DONE 973 * returns stop iterating processes early. 974 */ 975 #define PROC_RETURNED (0) 976 #define PROC_RETURNED_DONE (1) 977 #define PROC_CLAIMED (2) 978 #define PROC_CLAIMED_DONE (3) 979 980 /* 981 * pgrp_iterate walks the provided process group, calling `filterfn` with 982 * `filterarg` for each process. For processes where `filterfn` returned 983 * non-zero, `callout` is called with `arg`. 984 * 985 * `PGMEMBERS_FOREACH` might also be used under the pgrp_lock to achieve a 986 * similar effect. 987 */ 988 989 extern void pgrp_iterate(struct pgrp *pgrp, proc_iterate_fn_t callout, 990 void *arg, bool (^filterfn)(proc_t)); 991 992 /* 993 * proc_iterate walks the `allproc` and/or `zombproc` lists, calling `filterfn` 994 * with `filterarg` for each process. For processes where `filterfn` returned 995 * non-zero, `callout` is called with `arg`. If the `PROC_NOWAITTRANS` flag is 996 * unset, this function waits for transitions. 997 * 998 * `ALLPROC_FOREACH` or `ZOMBPROC_FOREACH` might also be used under the 999 * `proc_list_lock` to achieve a similar effect. 1000 */ 1001 #define PROC_ALLPROCLIST (1U << 0) /* walk the allproc list (processes not yet exited) */ 1002 #define PROC_ZOMBPROCLIST (1U << 1) /* walk the zombie list */ 1003 #define PROC_NOWAITTRANS (1U << 2) /* do not wait for transitions (checkdirs only) */ 1004 1005 extern void proc_iterate(unsigned int flags, proc_iterate_fn_t callout, 1006 void *arg, proc_iterate_fn_t filterfn, void *filterarg); 1007 1008 /* 1009 * proc_childrenwalk walks the children of process `p`, calling `callout` for 1010 * each one. 1011 * 1012 * `PCHILDREN_FOREACH` might also be used under the `proc_list_lock` to achieve 1013 * a similar effect. 1014 */ 1015 extern void proc_childrenwalk(proc_t p, proc_iterate_fn_t callout, void *arg); 1016 1017 /* 1018 * proc_rebootscan should only be used by kern_shutdown.c 1019 */ 1020 extern void proc_rebootscan(proc_iterate_fn_t callout, void *arg, 1021 proc_iterate_fn_t filterfn, void *filterarg); 1022 1023 pid_t dtrace_proc_selfpid(void); 1024 pid_t dtrace_proc_selfppid(void); 1025 uid_t dtrace_proc_selfruid(void); 1026 1027 os_refgrp_decl_extern(p_refgrp); 1028 KALLOC_TYPE_DECLARE(proc_stats_zone); 1029 ZONE_DECLARE_ID(ZONE_ID_PROC_TASK, struct proc); 1030 extern zone_t proc_task_zone; 1031 1032 extern struct proc_ident proc_ident(proc_t p); 1033 1034 #if CONFIG_PROC_RESOURCE_LIMITS 1035 int proc_set_filedesc_limits(proc_t p, int soft_limit, int hard_limit); 1036 #endif /* CONFIG_PROC_RESOURCE_LIMITS */ 1037 1038 /* 1039 * True if the process ignores file permissions in case it owns the 1040 * file/directory 1041 */ 1042 bool proc_ignores_node_permissions(proc_t proc); 1043 1044 #pragma GCC visibility pop 1045 #endif /* !_SYS_PROC_INTERNAL_H_ */ 1046