osfmk/kern/task.h

   1 /*
   2  * Copyright (c) 2000-2019 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
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   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,
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  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
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  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_FREE_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56 /*
  57  */
  58 /*
  59  *      File:   task.h
  60  *      Author: Avadis Tevanian, Jr.
  61  *
  62  *      This file contains the structure definitions for tasks.
  63  *
  64  */
  65 /*
  66  * Copyright (c) 1993 The University of Utah and
  67  * the Computer Systems Laboratory (CSL).  All rights reserved.
  68  *
  69  * Permission to use, copy, modify and distribute this software and its
  70  * documentation is hereby granted, provided that both the copyright
  71  * notice and this permission notice appear in all copies of the
  72  * software, derivative works or modified versions, and any portions
  73  * thereof, and that both notices appear in supporting documentation.
  74  *
  75  * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  76  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
  77  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  78  *
  79  * CSL requests users of this software to return to csl-dist@cs.utah.edu any
  80  * improvements that they make and grant CSL redistribution rights.
  81  *
  82  */
  83 /*
  84  * NOTICE: This file was modified by McAfee Research in 2004 to introduce
  85  * support for mandatory and extensible security protections.  This notice
  86  * is included in support of clause 2.2 (b) of the Apple Public License,
  87  * Version 2.0.
  88  * Copyright (c) 2005 SPARTA, Inc.
  89  */
  90
  91 #ifndef _KERN_TASK_H_
  92 #define _KERN_TASK_H_
  93
  94 #include <kern/kern_types.h>
  95 #include <mach/mach_types.h>
  96 #include <sys/cdefs.h>
  97
  98 #ifdef XNU_KERNEL_PRIVATE
  99 #include <kern/kern_cdata.h>
 100 #include <mach/sfi_class.h>
 101 #include <kern/queue.h>
 102 #include <sys/kern_sysctl.h>
 103 #endif /* XNU_KERNEL_PRIVATE */
 104
 105 #ifdef  MACH_KERNEL_PRIVATE
 106
 107 #include <mach/boolean.h>
 108 #include <mach/port.h>
 109 #include <mach/time_value.h>
 110 #include <mach/message.h>
 111 #include <mach/mach_param.h>
 112 #include <mach/task_info.h>
 113 #include <mach/exception_types.h>
 114 #include <mach/vm_statistics.h>
 115 #include <machine/task.h>
 116
 117 #if MONOTONIC
 118 #include <machine/monotonic.h>
 119 #endif /* MONOTONIC */
 120
 121 #include <kern/cpu_data.h>
 122 #include <kern/queue.h>
 123 #include <kern/exception.h>
 124 #include <kern/locks.h>
 125 #include <security/_label.h>
 126 #include <ipc/ipc_port.h>
 127
 128 #include <kern/thread.h>
 129 #include <mach/coalition.h>
 130 #include <stdatomic.h>
 131 #include <os/refcnt.h>
 132
 133 #ifdef CONFIG_ATM
 134 #include <atm/atm_internal.h>
 135 #endif
 136
 137 struct _cpu_time_qos_stats {
 138         uint64_t cpu_time_qos_default;
 139         uint64_t cpu_time_qos_maintenance;
 140         uint64_t cpu_time_qos_background;
 141         uint64_t cpu_time_qos_utility;
 142         uint64_t cpu_time_qos_legacy;
 143         uint64_t cpu_time_qos_user_initiated;
 144         uint64_t cpu_time_qos_user_interactive;
 145 };
 146
 147 struct task_writes_counters {
 148         uint64_t task_immediate_writes;
 149         uint64_t task_deferred_writes;
 150         uint64_t task_invalidated_writes;
 151         uint64_t task_metadata_writes;
 152 };
 153
 154 struct task_watchports;
 155 #include <bank/bank_internal.h>
 156
 157 struct task {
 158         /* Synchronization/destruction information */
 159         decl_lck_mtx_data(, lock);               /* Task's lock */
 160         os_refcnt_t     ref_count;      /* Number of references to me */
 161         boolean_t       active;         /* Task has not been terminated */
 162         boolean_t       halting;        /* Task is being halted */
 163         boolean_t       message_app_suspended;  /* Let iokit know when pidsuspended */
 164
 165         /* Virtual timers */
 166         uint32_t                vtimers;
 167
 168         /* Miscellaneous */
 169         vm_map_t        map;            /* Address space description */
 170         queue_chain_t   tasks;  /* global list of tasks */
 171         struct task_watchports *watchports; /* watchports passed in spawn */
 172         turnstile_inheritor_t returnwait_inheritor; /* inheritor for task_wait */
 173
 174 #if defined(CONFIG_SCHED_MULTIQ)
 175         sched_group_t sched_group;
 176 #endif /* defined(CONFIG_SCHED_MULTIQ) */
 177
 178         /* Threads in this task */
 179         queue_head_t            threads;
 180         struct restartable_ranges *restartable_ranges;
 181
 182         processor_set_t         pset_hint;
 183         struct affinity_space   *affinity_space;
 184
 185         int                     thread_count;
 186         uint32_t                active_thread_count;
 187         int                     suspend_count;  /* Internal scheduling only */
 188
 189         /* User-visible scheduling information */
 190         integer_t               user_stop_count;        /* outstanding stops */
 191         integer_t               legacy_stop_count;      /* outstanding legacy stops */
 192
 193         integer_t               priority;                       /* base priority for threads */
 194         integer_t               max_priority;           /* maximum priority for threads */
 195
 196         integer_t               importance;             /* priority offset (BSD 'nice' value) */
 197
 198         /* Task security and audit tokens */
 199         security_token_t sec_token;
 200         audit_token_t   audit_token;
 201
 202         /* Statistics */
 203         uint64_t                total_user_time;        /* terminated threads only */
 204         uint64_t                total_system_time;
 205         uint64_t                total_ptime;
 206         uint64_t                total_runnable_time;
 207
 208         /* IPC structures */
 209         decl_lck_mtx_data(, itk_lock_data);
 210         struct ipc_port *itk_self;      /* not a right, doesn't hold ref */
 211         struct ipc_port *itk_nself;     /* not a right, doesn't hold ref */
 212         struct ipc_port *itk_sself;     /* a send right */
 213         struct exception_action exc_actions[EXC_TYPES_COUNT];
 214         /* a send right each valid element  */
 215         struct ipc_port *itk_host;      /* a send right */
 216         struct ipc_port *itk_bootstrap; /* a send right */
 217         struct ipc_port *itk_seatbelt;  /* a send right */
 218         struct ipc_port *itk_gssd;      /* yet another send right */
 219         struct ipc_port *itk_debug_control; /* send right for debugmode communications */
 220         struct ipc_port *itk_task_access; /* and another send right */
 221         struct ipc_port *itk_resume;    /* a receive right to resume this task */
 222         struct ipc_port *itk_registered[TASK_PORT_REGISTER_MAX];
 223         /* all send rights */
 224
 225         struct ipc_space *itk_space;
 226
 227         ledger_t        ledger;
 228         /* Synchronizer ownership information */
 229         queue_head_t    semaphore_list;         /* list of owned semaphores   */
 230         int             semaphores_owned;       /* number of semaphores owned */
 231
 232         unsigned int    priv_flags;                     /* privilege resource flags */
 233 #define VM_BACKING_STORE_PRIV   0x1
 234
 235         MACHINE_TASK
 236
 237         integer_t faults;              /* faults counter */
 238         integer_t decompressions;      /* decompression counter */
 239         integer_t pageins;             /* pageins counter */
 240         integer_t cow_faults;          /* copy on write fault counter */
 241         integer_t messages_sent;       /* messages sent counter */
 242         integer_t messages_received;   /* messages received counter */
 243         integer_t syscalls_mach;       /* mach system call counter */
 244         integer_t syscalls_unix;       /* unix system call counter */
 245         uint32_t  c_switch;                                /* total context switches */
 246         uint32_t  p_switch;                                /* total processor switches */
 247         uint32_t  ps_switch;                       /* total pset switches */
 248
 249 #ifdef  MACH_BSD
 250         void *bsd_info;
 251 #endif
 252         kcdata_descriptor_t             corpse_info;
 253         uint64_t                        crashed_thread_id;
 254         queue_chain_t                   corpse_tasks;
 255 #ifdef CONFIG_MACF
 256         struct label *                  crash_label;
 257 #endif
 258         struct vm_shared_region         *shared_region;
 259         volatile uint32_t t_flags;                                      /* general-purpose task flags protected by task_lock (TL) */
 260 #define TF_NONE                 0
 261 #define TF_64B_ADDR             0x00000001                              /* task has 64-bit addressing */
 262 #define TF_64B_DATA             0x00000002                              /* task has 64-bit data registers */
 263 #define TF_CPUMON_WARNING       0x00000004                              /* task has at least one thread in CPU usage warning zone */
 264 #define TF_WAKEMON_WARNING      0x00000008                              /* task is in wakeups monitor warning zone */
 265 #define TF_TELEMETRY            (TF_CPUMON_WARNING | TF_WAKEMON_WARNING) /* task is a telemetry participant */
 266 #define TF_GPU_DENIED           0x00000010                              /* task is not allowed to access the GPU */
 267 #define TF_CORPSE               0x00000020                              /* task is a corpse */
 268 #define TF_PENDING_CORPSE       0x00000040                              /* task corpse has not been reported yet */
 269 #define TF_CORPSE_FORK          0x00000080                              /* task is a forked corpse */
 270 #define TF_PLATFORM             0x00000400                              /* task is a platform binary */
 271 #define TF_CA_CLIENT_WI         0x00000800                              /* task has CA_CLIENT work interval */
 272 #define TF_DARKWAKE_MODE        0x00001000                              /* task is in darkwake mode */
 273 #define TF_NO_SMT               0x00002000                              /* task threads must not be paired with SMT threads */
 274
 275 /*
 276  * Task is running within a 64-bit address space.
 277  */
 278 #define task_has_64Bit_addr(task)       \
 279         (((task)->t_flags & TF_64B_ADDR) != 0)
 280 #define task_set_64Bit_addr(task)       \
 281         ((task)->t_flags |= TF_64B_ADDR)
 282 #define task_clear_64Bit_addr(task)     \
 283         ((task)->t_flags &= ~TF_64B_ADDR)
 284
 285 /*
 286  * Task is using 64-bit machine state.
 287  */
 288 #define task_has_64Bit_data(task)       \
 289         (((task)->t_flags & TF_64B_DATA) != 0)
 290 #define task_set_64Bit_data(task)       \
 291         ((task)->t_flags |= TF_64B_DATA)
 292 #define task_clear_64Bit_data(task)     \
 293         ((task)->t_flags &= ~TF_64B_DATA)
 294
 295 #define task_is_a_corpse(task)      \
 296          (((task)->t_flags & TF_CORPSE) != 0)
 297
 298 #define task_set_corpse(task)       \
 299          ((task)->t_flags |= TF_CORPSE)
 300
 301 #define task_corpse_pending_report(task)        \
 302          (((task)->t_flags & TF_PENDING_CORPSE) != 0)
 303
 304 #define task_set_corpse_pending_report(task)       \
 305          ((task)->t_flags |= TF_PENDING_CORPSE)
 306
 307 #define task_clear_corpse_pending_report(task)       \
 308          ((task)->t_flags &= ~TF_PENDING_CORPSE)
 309
 310 #define task_is_a_corpse_fork(task)     \
 311         (((task)->t_flags & TF_CORPSE_FORK) != 0)
 312
 313         uint32_t t_procflags;                                            /* general-purpose task flags protected by proc_lock (PL) */
 314 #define TPF_NONE                 0
 315 #define TPF_DID_EXEC             0x00000001                              /* task has been execed to a new task */
 316 #define TPF_EXEC_COPY            0x00000002                              /* task is the new copy of an exec */
 317 #ifdef CONFIG_32BIT_TELEMETRY
 318 #define TPF_LOG_32BIT_TELEMETRY  0x00000004                              /* task should log identifying information */
 319 #endif
 320
 321 #define task_did_exec_internal(task)            \
 322         (((task)->t_procflags & TPF_DID_EXEC) != 0)
 323
 324 #define task_is_exec_copy_internal(task)        \
 325         (((task)->t_procflags & TPF_EXEC_COPY) != 0)
 326
 327         uint8_t                  t_returnwaitflags;
 328 #define TWF_NONE                 0
 329 #define TRW_LRETURNWAIT          0x01           /* task is waiting for fork/posix_spawn/exec to complete */
 330 #define TRW_LRETURNWAITER        0x02           /* task is waiting for TRW_LRETURNWAIT to get cleared */
 331
 332         mach_vm_address_t       all_image_info_addr; /* dyld __all_image_info     */
 333         mach_vm_size_t          all_image_info_size; /* section location and size */
 334
 335 #if KPC
 336 #define TASK_KPC_FORCED_ALL_CTRS        0x2     /* Bit in "t_kpc" signifying this task forced all counters */
 337         uint32_t t_kpc; /* kpc flags */
 338 #endif /* KPC */
 339
 340         boolean_t pidsuspended; /* pid_suspend called; no threads can execute */
 341         boolean_t frozen;       /* frozen; private resident pages committed to swap */
 342         boolean_t changing_freeze_state;        /* in the process of freezing or thawing */
 343         uint16_t policy_ru_cpu          :4,
 344             policy_ru_cpu_ext      :4,
 345             applied_ru_cpu         :4,
 346             applied_ru_cpu_ext     :4;
 347         uint8_t  rusage_cpu_flags;
 348         uint8_t  rusage_cpu_percentage;         /* Task-wide CPU limit percentage */
 349         uint8_t  rusage_cpu_perthr_percentage;  /* Per-thread CPU limit percentage */
 350 #if MACH_ASSERT
 351         int8_t          suspends_outstanding;   /* suspends this task performed in excess of resumes */
 352 #endif
 353         uint64_t rusage_cpu_interval;           /* Task-wide CPU limit interval */
 354         uint64_t rusage_cpu_perthr_interval;    /* Per-thread CPU limit interval */
 355         uint64_t rusage_cpu_deadline;
 356         thread_call_t rusage_cpu_callt;
 357 #if CONFIG_EMBEDDED
 358         queue_head_t    task_watchers;          /* app state watcher threads */
 359         int     num_taskwatchers;
 360         int             watchapplying;
 361 #endif /* CONFIG_EMBEDDED */
 362
 363 #if CONFIG_ATM
 364         struct atm_task_descriptor *atm_context;  /* pointer to per task atm descriptor */
 365 #endif
 366         struct bank_task *bank_context;  /* pointer to per task bank structure */
 367
 368 #if IMPORTANCE_INHERITANCE
 369         struct ipc_importance_task  *task_imp_base;     /* Base of IPC importance chain */
 370 #endif /* IMPORTANCE_INHERITANCE */
 371
 372         vm_extmod_statistics_data_t     extmod_statistics;
 373
 374         struct task_requested_policy requested_policy;
 375         struct task_effective_policy effective_policy;
 376
 377         /*
 378          * Can be merged with imp_donor bits, once the IMPORTANCE_INHERITANCE macro goes away.
 379          */
 380         uint32_t        low_mem_notified_warn           :1,     /* warning low memory notification is sent to the task */
 381             low_mem_notified_critical       :1,                 /* critical low memory notification is sent to the task */
 382             purged_memory_warn              :1,                 /* purgeable memory of the task is purged for warning level pressure */
 383             purged_memory_critical          :1,                 /* purgeable memory of the task is purged for critical level pressure */
 384             low_mem_privileged_listener     :1,                 /* if set, task would like to know about pressure changes before other tasks on the system */
 385             mem_notify_reserved             :27;                /* reserved for future use */
 386
 387         uint32_t memlimit_is_active                 :1, /* if set, use active attributes, otherwise use inactive attributes */
 388             memlimit_is_fatal                   :1,     /* if set, exceeding current memlimit will prove fatal to the task */
 389             memlimit_active_exc_resource        :1,     /* if set, suppress exc_resource exception when task exceeds active memory limit */
 390             memlimit_inactive_exc_resource      :1,     /* if set, suppress exc_resource exception when task exceeds inactive memory limit */
 391             memlimit_attrs_reserved             :28;     /* reserved for future use */
 392
 393         io_stat_info_t          task_io_stats;
 394
 395         struct task_writes_counters task_writes_counters_internal;
 396         struct task_writes_counters task_writes_counters_external;
 397
 398         /*
 399          * The cpu_time_qos_stats fields are protected by the task lock
 400          */
 401         struct _cpu_time_qos_stats      cpu_time_eqos_stats;
 402         struct _cpu_time_qos_stats      cpu_time_rqos_stats;
 403
 404         /* Statistics accumulated for terminated threads from this task */
 405         uint32_t        task_timer_wakeups_bin_1;
 406         uint32_t        task_timer_wakeups_bin_2;
 407         uint64_t        task_gpu_ns;
 408         uint64_t        task_energy;
 409
 410 #if MONOTONIC
 411         /* Read and written under task_lock */
 412         struct mt_task task_monotonic;
 413 #endif /* MONOTONIC */
 414
 415         uint8_t         task_can_transfer_memory_ownership;
 416         uint8_t         task_objects_disowning;
 417         uint8_t         task_objects_disowned;
 418         /* # of purgeable volatile VM objects owned by this task: */
 419         int             task_volatile_objects;
 420         /* # of purgeable but not volatile VM objects owned by this task: */
 421         int             task_nonvolatile_objects;
 422         int             task_owned_objects;
 423         queue_head_t    task_objq;
 424         decl_lck_mtx_data(, task_objq_lock); /* protects "task_objq" */
 425
 426         unsigned int    task_thread_limit:16;
 427 #if __arm64__
 428         unsigned int    task_legacy_footprint:1;
 429         unsigned int    task_extra_footprint_limit:1;
 430 #endif /* __arm64__ */
 431         unsigned int    task_region_footprint:1;
 432         unsigned int    task_has_crossed_thread_limit:1;
 433         uint32_t        exec_token;
 434         /*
 435          * A task's coalition set is "adopted" in task_create_internal
 436          * and unset in task_deallocate_internal, so each array member
 437          * can be referenced without the task lock.
 438          * Note: these fields are protected by coalition->lock,
 439          *       not the task lock.
 440          */
 441         coalition_t     coalition[COALITION_NUM_TYPES];
 442         queue_chain_t   task_coalition[COALITION_NUM_TYPES];
 443         uint64_t        dispatchqueue_offset;
 444
 445 #if DEVELOPMENT || DEBUG
 446         boolean_t       task_unnested;
 447         int             task_disconnected_count;
 448 #endif
 449
 450 #if HYPERVISOR
 451         void *hv_task_target; /* hypervisor virtual machine object associated with this task */
 452 #endif /* HYPERVISOR */
 453
 454 #if CONFIG_SECLUDED_MEMORY
 455         uint8_t task_can_use_secluded_mem;
 456         uint8_t task_could_use_secluded_mem;
 457         uint8_t task_could_also_use_secluded_mem;
 458         uint8_t task_suppressed_secluded;
 459 #endif /* CONFIG_SECLUDED_MEMORY */
 460
 461         task_exc_guard_behavior_t task_exc_guard;
 462
 463         queue_head_t    io_user_clients;
 464
 465         mach_vm_address_t mach_header_vm_address;
 466
 467         uint32_t loadTag; /* dext ID used for logging identity */
 468 };
 469
 470 /*
 471  * EXC_GUARD default delivery behavior for optional Mach port and VM guards.
 472  * Applied to new tasks at creation time.
 473  */
 474 extern task_exc_guard_behavior_t task_exc_guard_default;
 475
 476 extern kern_return_t
 477     task_violated_guard(mach_exception_code_t, mach_exception_subcode_t, void *);
 478
 479 #define task_lock(task)                 lck_mtx_lock(&(task)->lock)
 480 #define task_lock_assert_owned(task)    LCK_MTX_ASSERT(&(task)->lock, LCK_MTX_ASSERT_OWNED)
 481 #define task_lock_try(task)             lck_mtx_try_lock(&(task)->lock)
 482 #define task_unlock(task)               lck_mtx_unlock(&(task)->lock)
 483
 484 #define task_objq_lock_init(task)       lck_mtx_init(&(task)->task_objq_lock, &vm_object_lck_grp, &vm_object_lck_attr)
 485 #define task_objq_lock(task)            lck_mtx_lock(&(task)->task_objq_lock)
 486 #define task_objq_lock_assert_owned(task)       LCK_MTX_ASSERT(&(task)->task_objq_lock, LCK_MTX_ASSERT_OWNED)
 487 #define task_objq_lock_try(task)        lck_mtx_try_lock(&(task)->task_objq_lock)
 488 #define task_objq_unlock(task)          lck_mtx_unlock(&(task)->task_objq_lock)
 489
 490 #define itk_lock_init(task)     lck_mtx_init(&(task)->itk_lock_data, &ipc_lck_grp, &ipc_lck_attr)
 491 #define itk_lock_destroy(task)  lck_mtx_destroy(&(task)->itk_lock_data, &ipc_lck_grp)
 492 #define itk_lock(task)          lck_mtx_lock(&(task)->itk_lock_data)
 493 #define itk_unlock(task)        lck_mtx_unlock(&(task)->itk_lock_data)
 494
 495 /* task clear return wait flags */
 496 #define TCRW_CLEAR_INITIAL_WAIT   0x1
 497 #define TCRW_CLEAR_FINAL_WAIT     0x2
 498 #define TCRW_CLEAR_ALL_WAIT       (TCRW_CLEAR_INITIAL_WAIT | TCRW_CLEAR_FINAL_WAIT)
 499
 500 #define TASK_REFERENCE_LEAK_DEBUG 0
 501
 502 #if TASK_REFERENCE_LEAK_DEBUG
 503 extern void task_reference_internal(task_t task);
 504 extern os_ref_count_t task_deallocate_internal(task_t task);
 505 #else
 506 #define task_reference_internal(task) os_ref_retain(&(task)->ref_count)
 507 #define task_deallocate_internal(task) os_ref_release(&(task)->ref_count)
 508 #endif
 509
 510 #define task_reference(task)                                    \
 511 MACRO_BEGIN                                                                             \
 512         if ((task) != TASK_NULL)                                        \
 513                 task_reference_internal(task);                  \
 514 MACRO_END
 515
 516 extern kern_return_t    kernel_task_create(
 517         task_t                  task,
 518         vm_offset_t             map_base,
 519         vm_size_t               map_size,
 520         task_t                  *child);
 521
 522 /* Initialize task module */
 523 extern void             task_init(void);
 524
 525 /* coalition_init() calls this to initialize ledgers before task_init() */
 526 extern void             init_task_ledgers(void);
 527
 528 #define current_task_fast()     (current_thread()->task)
 529 #define current_task()          current_task_fast()
 530
 531 extern bool task_is_driver(task_t task);
 532
 533 extern lck_attr_t      task_lck_attr;
 534 extern lck_grp_t       task_lck_grp;
 535
 536 struct task_watchport_elem {
 537         task_t                          twe_task;
 538         ipc_port_t                      twe_port;     /* (Space lock) */
 539 };
 540
 541 struct task_watchports {
 542         os_refcnt_t                     tw_refcount;           /* (Space lock) */
 543         task_t                          tw_task;               /* (Space lock) & tw_refcount == 0 */
 544         thread_t                        tw_thread;             /* (Space lock) & tw_refcount == 0 */
 545         uint32_t                        tw_elem_array_count;   /* (Space lock) */
 546         struct task_watchport_elem      tw_elem[];             /* (Space lock) & (Portlock) & (mq lock) */
 547 };
 548
 549 #define task_watchports_retain(x)   (os_ref_retain(&(x)->tw_refcount))
 550 #define task_watchports_release(x)  (os_ref_release(&(x)->tw_refcount))
 551
 552 #define task_watchport_elem_init(elem, task, port) \
 553 do {                                               \
 554         (elem)->twe_task = (task);                 \
 555         (elem)->twe_port = (port);                 \
 556 } while(0)
 557
 558 #define task_watchport_elem_clear(elem) task_watchport_elem_init((elem), NULL, NULL)
 559
 560 extern void
 561 task_add_turnstile_watchports(
 562         task_t          task,
 563         thread_t        thread,
 564         ipc_port_t      *portwatch_ports,
 565         uint32_t        portwatch_count);
 566
 567 extern void
 568 task_watchport_elem_deallocate(
 569         struct          task_watchport_elem *watchport_elem);
 570
 571 extern boolean_t
 572 task_has_watchports(task_t task);
 573
 574 #else   /* MACH_KERNEL_PRIVATE */
 575
 576 __BEGIN_DECLS
 577
 578 extern task_t   current_task(void);
 579
 580 extern void             task_reference(task_t   task);
 581 extern bool task_is_driver(task_t task);
 582
 583 #define TF_NONE                 0
 584
 585 #define TWF_NONE                 0
 586 #define TRW_LRETURNWAIT          0x01           /* task is waiting for fork/posix_spawn/exec to complete */
 587 #define TRW_LRETURNWAITER        0x02           /* task is waiting for TRW_LRETURNWAIT to get cleared */
 588
 589 /* task clear return wait flags */
 590 #define TCRW_CLEAR_INITIAL_WAIT   0x1
 591 #define TCRW_CLEAR_FINAL_WAIT     0x2
 592 #define TCRW_CLEAR_ALL_WAIT       (TCRW_CLEAR_INITIAL_WAIT | TCRW_CLEAR_FINAL_WAIT)
 593
 594
 595 #define TPF_NONE                0
 596 #define TPF_EXEC_COPY           0x00000002                              /* task is the new copy of an exec */
 597
 598
 599 __END_DECLS
 600
 601 #endif  /* MACH_KERNEL_PRIVATE */
 602
 603 __BEGIN_DECLS
 604
 605 #ifdef KERNEL_PRIVATE
 606 extern boolean_t                task_is_app_suspended(task_t task);
 607 #endif
 608
 609 #ifdef  XNU_KERNEL_PRIVATE
 610
 611 /* Hold all threads in a task */
 612 extern kern_return_t    task_hold(
 613         task_t          task);
 614
 615 /* Wait for task to stop running, either just to get off CPU or to cease being runnable */
 616 extern kern_return_t    task_wait(
 617         task_t          task,
 618         boolean_t       until_not_runnable);
 619
 620 /* Release hold on all threads in a task */
 621 extern kern_return_t    task_release(
 622         task_t          task);
 623
 624 /* Suspend/resume a task where the kernel owns the suspend count */
 625 extern kern_return_t    task_suspend_internal(          task_t          task);
 626 extern kern_return_t    task_resume_internal(           task_t          task);
 627
 628 /* Suspends a task by placing a hold on its threads */
 629 extern kern_return_t    task_pidsuspend(
 630         task_t          task);
 631
 632 /* Resumes a previously paused task */
 633 extern kern_return_t    task_pidresume(
 634         task_t          task);
 635
 636 extern kern_return_t    task_send_trace_memory(
 637         task_t          task,
 638         uint32_t        pid,
 639         uint64_t        uniqueid);
 640
 641 extern void             task_remove_turnstile_watchports(
 642         task_t          task);
 643
 644 extern void             task_transfer_turnstile_watchports(
 645         task_t          old_task,
 646         task_t          new_task,
 647         thread_t        new_thread);
 648
 649 #if DEVELOPMENT || DEBUG
 650
 651 extern kern_return_t    task_disconnect_page_mappings(
 652         task_t          task);
 653 #endif
 654
 655 extern void                     tasks_system_suspend(boolean_t suspend);
 656
 657 #if CONFIG_FREEZE
 658
 659 /* Freeze a task's resident pages */
 660 extern kern_return_t    task_freeze(
 661         task_t          task,
 662         uint32_t        *purgeable_count,
 663         uint32_t        *wired_count,
 664         uint32_t        *clean_count,
 665         uint32_t        *dirty_count,
 666         uint32_t        dirty_budget,
 667         uint32_t        *shared_count,
 668         int             *freezer_error_code,
 669         boolean_t       eval_only);
 670
 671 /* Thaw a currently frozen task */
 672 extern kern_return_t    task_thaw(
 673         task_t          task);
 674
 675 #endif /* CONFIG_FREEZE */
 676
 677 /* Halt all other threads in the current task */
 678 extern kern_return_t    task_start_halt(
 679         task_t          task);
 680
 681 /* Wait for other threads to halt and free halting task resources */
 682 extern void             task_complete_halt(
 683         task_t          task);
 684
 685 extern kern_return_t    task_terminate_internal(
 686         task_t                  task);
 687
 688 extern kern_return_t    task_create_internal(
 689         task_t          parent_task,
 690         coalition_t     *parent_coalitions,
 691         boolean_t       inherit_memory,
 692         boolean_t       is_64bit,
 693         boolean_t       is_64bit_data,
 694         uint32_t        flags,
 695         uint32_t        procflags,
 696         uint8_t         t_returnwaitflags,
 697         task_t          *child_task);                                                   /* OUT */
 698
 699 extern kern_return_t    task_info(
 700         task_t                  task,
 701         task_flavor_t           flavor,
 702         task_info_t             task_info_out,
 703         mach_msg_type_number_t  *task_info_count);
 704
 705 extern void             task_power_info_locked(
 706         task_t                  task,
 707         task_power_info_t       info,
 708         gpu_energy_data_t       gpu_energy,
 709         task_power_info_v2_t    infov2,
 710         uint64_t                *runnable_time);
 711
 712 extern uint64_t         task_gpu_utilisation(
 713         task_t   task);
 714
 715 extern uint64_t         task_energy(
 716         task_t   task);
 717
 718 extern uint64_t         task_cpu_ptime(
 719         task_t   task);
 720 extern void             task_update_cpu_time_qos_stats(
 721         task_t   task,
 722         uint64_t *eqos_stats,
 723         uint64_t *rqos_stats);
 724
 725 extern void             task_vtimer_set(
 726         task_t          task,
 727         integer_t       which);
 728
 729 extern void             task_vtimer_clear(
 730         task_t          task,
 731         integer_t       which);
 732
 733 extern void             task_vtimer_update(
 734         task_t          task,
 735         integer_t       which,
 736         uint32_t        *microsecs);
 737
 738 #define TASK_VTIMER_USER                0x01
 739 #define TASK_VTIMER_PROF                0x02
 740 #define TASK_VTIMER_RLIM                0x04
 741
 742 extern void             task_set_64bit(
 743         task_t          task,
 744         boolean_t       is_64bit,
 745         boolean_t       is_64bit_data);
 746
 747 extern boolean_t        task_get_64bit_data(
 748         task_t task);
 749
 750 extern void     task_set_platform_binary(
 751         task_t task,
 752         boolean_t is_platform);
 753 extern bool     task_set_ca_client_wi(
 754         task_t task,
 755         boolean_t ca_client_wi);
 756
 757 extern void             task_set_dyld_info(
 758         task_t          task,
 759         mach_vm_address_t addr,
 760         mach_vm_size_t size);
 761
 762 extern void task_set_mach_header_address(
 763         task_t task,
 764         mach_vm_address_t addr);
 765
 766 /* Get number of activations in a task */
 767 extern int              get_task_numacts(
 768         task_t          task);
 769
 770 struct label;
 771 extern kern_return_t task_collect_crash_info(
 772         task_t task,
 773 #if CONFIG_MACF
 774         struct label *crash_label,
 775 #endif
 776         int is_corpse_fork);
 777 void task_port_notify(mach_msg_header_t *msg);
 778 void task_wait_till_threads_terminate_locked(task_t task);
 779
 780 /* JMM - should just be temporary (implementation in bsd_kern still) */
 781 extern void     set_bsdtask_info(task_t, void *);
 782 extern uint32_t set_task_loadTag(task_t task, uint32_t loadTag);
 783 extern vm_map_t get_task_map_reference(task_t);
 784 extern vm_map_t swap_task_map(task_t, thread_t, vm_map_t);
 785 extern pmap_t   get_task_pmap(task_t);
 786 extern uint64_t get_task_resident_size(task_t);
 787 extern uint64_t get_task_compressed(task_t);
 788 extern uint64_t get_task_resident_max(task_t);
 789 extern uint64_t get_task_phys_footprint(task_t);
 790 #if CONFIG_LEDGER_INTERVAL_MAX
 791 extern uint64_t get_task_phys_footprint_interval_max(task_t, int reset);
 792 #endif /* CONFIG_FOOTPRINT_INTERVAL_MAX */
 793 extern uint64_t get_task_phys_footprint_lifetime_max(task_t);
 794 extern uint64_t get_task_phys_footprint_limit(task_t);
 795 extern uint64_t get_task_purgeable_size(task_t);
 796 extern uint64_t get_task_cpu_time(task_t);
 797 extern uint64_t get_task_dispatchqueue_offset(task_t);
 798 extern uint64_t get_task_dispatchqueue_serialno_offset(task_t);
 799 extern uint64_t get_task_dispatchqueue_label_offset(task_t);
 800 extern uint64_t get_task_uniqueid(task_t task);
 801 extern int      get_task_version(task_t task);
 802
 803 extern uint64_t get_task_internal(task_t);
 804 extern uint64_t get_task_internal_compressed(task_t);
 805 extern uint64_t get_task_purgeable_nonvolatile(task_t);
 806 extern uint64_t get_task_purgeable_nonvolatile_compressed(task_t);
 807 extern uint64_t get_task_iokit_mapped(task_t);
 808 extern uint64_t get_task_alternate_accounting(task_t);
 809 extern uint64_t get_task_alternate_accounting_compressed(task_t);
 810 extern uint64_t get_task_memory_region_count(task_t);
 811 extern uint64_t get_task_page_table(task_t);
 812 extern uint64_t get_task_network_nonvolatile(task_t);
 813 extern uint64_t get_task_network_nonvolatile_compressed(task_t);
 814 extern uint64_t get_task_wired_mem(task_t);
 815 extern uint32_t get_task_loadTag(task_t task);
 816
 817 extern kern_return_t task_convert_phys_footprint_limit(int, int *);
 818 extern kern_return_t task_set_phys_footprint_limit_internal(task_t, int, int *, boolean_t, boolean_t);
 819 extern kern_return_t task_get_phys_footprint_limit(task_t task, int *limit_mb);
 820
 821 /* Jetsam memlimit attributes */
 822 extern boolean_t task_get_memlimit_is_active(task_t task);
 823 extern boolean_t task_get_memlimit_is_fatal(task_t task);
 824 extern void task_set_memlimit_is_active(task_t task, boolean_t memlimit_is_active);
 825 extern void task_set_memlimit_is_fatal(task_t task, boolean_t memlimit_is_fatal);
 826 extern boolean_t task_has_triggered_exc_resource(task_t task, boolean_t memlimit_is_active);
 827 extern void task_mark_has_triggered_exc_resource(task_t task, boolean_t memlimit_is_active);
 828
 829 extern void task_set_thread_limit(task_t task, uint16_t thread_limit);
 830
 831
 832 extern boolean_t        is_kerneltask(task_t task);
 833 extern boolean_t        is_corpsetask(task_t task);
 834
 835 extern kern_return_t check_actforsig(task_t task, thread_t thread, int setast);
 836
 837 extern kern_return_t machine_task_get_state(
 838         task_t task,
 839         int flavor,
 840         thread_state_t state,
 841         mach_msg_type_number_t *state_count);
 842
 843 extern kern_return_t machine_task_set_state(
 844         task_t task,
 845         int flavor,
 846         thread_state_t state,
 847         mach_msg_type_number_t state_count);
 848
 849 extern void machine_task_terminate(task_t task);
 850
 851 struct _task_ledger_indices {
 852         int cpu_time;
 853         int tkm_private;
 854         int tkm_shared;
 855         int phys_mem;
 856         int wired_mem;
 857         int internal;
 858         int iokit_mapped;
 859         int alternate_accounting;
 860         int alternate_accounting_compressed;
 861         int page_table;
 862         int phys_footprint;
 863         int internal_compressed;
 864         int purgeable_volatile;
 865         int purgeable_nonvolatile;
 866         int purgeable_volatile_compressed;
 867         int purgeable_nonvolatile_compressed;
 868         int tagged_nofootprint;
 869         int tagged_footprint;
 870         int tagged_nofootprint_compressed;
 871         int tagged_footprint_compressed;
 872         int network_volatile;
 873         int network_nonvolatile;
 874         int network_volatile_compressed;
 875         int network_nonvolatile_compressed;
 876         int media_nofootprint;
 877         int media_footprint;
 878         int media_nofootprint_compressed;
 879         int media_footprint_compressed;
 880         int graphics_nofootprint;
 881         int graphics_footprint;
 882         int graphics_nofootprint_compressed;
 883         int graphics_footprint_compressed;
 884         int neural_nofootprint;
 885         int neural_footprint;
 886         int neural_nofootprint_compressed;
 887         int neural_footprint_compressed;
 888         int platform_idle_wakeups;
 889         int interrupt_wakeups;
 890 #if CONFIG_SCHED_SFI
 891         int sfi_wait_times[MAX_SFI_CLASS_ID];
 892 #endif /* CONFIG_SCHED_SFI */
 893         int cpu_time_billed_to_me;
 894         int cpu_time_billed_to_others;
 895         int physical_writes;
 896         int logical_writes;
 897         int logical_writes_to_external;
 898         int energy_billed_to_me;
 899         int energy_billed_to_others;
 900 #if DEBUG || DEVELOPMENT
 901         int pages_grabbed;
 902         int pages_grabbed_kern;
 903         int pages_grabbed_iopl;
 904         int pages_grabbed_upl;
 905 #endif
 906 };
 907 extern struct _task_ledger_indices task_ledgers;
 908
 909 /* requires task to be unlocked, returns a referenced thread */
 910 thread_t task_findtid(task_t task, uint64_t tid);
 911 int pid_from_task(task_t task);
 912
 913 extern kern_return_t task_wakeups_monitor_ctl(task_t task, uint32_t *rate_hz, int32_t *flags);
 914 extern kern_return_t task_cpu_usage_monitor_ctl(task_t task, uint32_t *flags);
 915 extern void task_rollup_accounting_info(task_t new_task, task_t parent_task);
 916 extern kern_return_t task_io_monitor_ctl(task_t task, uint32_t *flags);
 917 extern void task_set_did_exec_flag(task_t task);
 918 extern void task_clear_exec_copy_flag(task_t task);
 919 extern boolean_t task_is_exec_copy(task_t);
 920 extern boolean_t task_did_exec(task_t task);
 921 #ifdef CONFIG_32BIT_TELEMETRY
 922 extern boolean_t task_consume_32bit_log_flag(task_t task);
 923 extern void task_set_32bit_log_flag(task_t task);
 924 #endif /* CONFIG_32BIT_TELEMETRY */
 925 extern boolean_t task_is_active(task_t task);
 926 extern boolean_t task_is_halting(task_t task);
 927 extern void task_clear_return_wait(task_t task, uint32_t flags);
 928 extern void task_wait_to_return(void) __attribute__((noreturn));
 929 extern event_t task_get_return_wait_event(task_t task);
 930
 931 extern void task_atm_reset(task_t task);
 932 extern void task_bank_reset(task_t task);
 933 extern void task_bank_init(task_t task);
 934
 935 #if CONFIG_ARCADE
 936 extern void task_prep_arcade(task_t task, thread_t thread);
 937 #endif /* CONFIG_ARCADE */
 938
 939 extern int task_pid(task_t task);
 940 extern boolean_t task_has_assertions(task_t task);
 941 /* End task_policy */
 942
 943 extern void      task_set_gpu_denied(task_t task, boolean_t denied);
 944 extern boolean_t task_is_gpu_denied(task_t task);
 945
 946 extern queue_head_t * task_io_user_clients(task_t task);
 947 extern void     task_set_message_app_suspended(task_t task, boolean_t enable);
 948
 949 extern void task_copy_fields_for_exec(task_t dst_task, task_t src_task);
 950
 951 extern void task_copy_vmobjects(task_t task, vm_object_query_t query, int len, int64_t* num);
 952
 953 #endif  /* XNU_KERNEL_PRIVATE */
 954
 955 #ifdef  KERNEL_PRIVATE
 956
 957 extern void     *get_bsdtask_info(task_t);
 958 extern void     *get_bsdthreadtask_info(thread_t);
 959 extern void task_bsdtask_kill(task_t);
 960 extern vm_map_t get_task_map(task_t);
 961 extern ledger_t get_task_ledger(task_t);
 962
 963 extern boolean_t get_task_pidsuspended(task_t);
 964 extern boolean_t get_task_suspended(task_t);
 965 extern boolean_t get_task_frozen(task_t);
 966
 967 /* Convert from a task to a port */
 968 extern ipc_port_t convert_task_to_port(task_t);
 969 extern ipc_port_t convert_task_name_to_port(task_name_t);
 970 extern ipc_port_t convert_task_inspect_to_port(task_inspect_t);
 971 extern ipc_port_t convert_task_suspension_token_to_port(task_suspension_token_t task);
 972
 973 /* Convert from a port (in this case, an SO right to a task's resume port) to a task. */
 974 extern task_suspension_token_t convert_port_to_task_suspension_token(ipc_port_t port);
 975
 976 extern boolean_t task_suspension_notify(mach_msg_header_t *);
 977
 978 #define TASK_WRITE_IMMEDIATE                 0x1
 979 #define TASK_WRITE_DEFERRED                  0x2
 980 #define TASK_WRITE_INVALIDATED               0x4
 981 #define TASK_WRITE_METADATA                  0x8
 982 extern void     task_update_logical_writes(task_t task, uint32_t io_size, int flags, void *vp);
 983
 984 #if CONFIG_SECLUDED_MEMORY
 985 extern void task_set_can_use_secluded_mem(
 986         task_t task,
 987         boolean_t can_use_secluded_mem);
 988 extern void task_set_could_use_secluded_mem(
 989         task_t task,
 990         boolean_t could_use_secluded_mem);
 991 extern void task_set_could_also_use_secluded_mem(
 992         task_t task,
 993         boolean_t could_also_use_secluded_mem);
 994 extern boolean_t task_can_use_secluded_mem(
 995         task_t task,
 996         boolean_t is_allocate);
 997 extern boolean_t task_could_use_secluded_mem(task_t task);
 998 extern boolean_t task_could_also_use_secluded_mem(task_t task);
 999 #endif /* CONFIG_SECLUDED_MEMORY */
1000
1001 extern void task_set_darkwake_mode(task_t, boolean_t);
1002 extern boolean_t task_get_darkwake_mode(task_t);
1003
1004 #if __arm64__
1005 extern void task_set_legacy_footprint(task_t task);
1006 extern void task_set_extra_footprint_limit(task_t task);
1007 #endif /* __arm64__ */
1008
1009 #if CONFIG_MACF
1010 extern struct label *get_task_crash_label(task_t task);
1011 #endif /* CONFIG_MACF */
1012
1013 extern int get_task_cdhash(task_t task, char cdhash[]);
1014
1015 #endif  /* KERNEL_PRIVATE */
1016
1017 extern task_t   kernel_task;
1018
1019 extern void             task_deallocate(
1020         task_t          task);
1021
1022 extern void             task_name_deallocate(
1023         task_name_t             task_name);
1024
1025 extern void             task_inspect_deallocate(
1026         task_inspect_t          task_inspect);
1027
1028 extern void             task_suspension_token_deallocate(
1029         task_suspension_token_t token);
1030
1031 extern boolean_t task_self_region_footprint(void);
1032 extern void task_self_region_footprint_set(boolean_t newval);
1033 extern void task_ledgers_footprint(ledger_t ledger,
1034     ledger_amount_t *ledger_resident,
1035     ledger_amount_t *ledger_compressed);
1036 extern void task_set_memory_ownership_transfer(
1037         task_t task,
1038         boolean_t value);
1039
1040 __END_DECLS
1041
1042 #endif  /* _KERN_TASK_H_ */