osfmk/kern/task.h

   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
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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,
  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 /*
  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 #endif /* XNU_KERNEL_PRIVATE */
 103
 104 #ifdef  MACH_KERNEL_PRIVATE
 105
 106 #include <mach/boolean.h>
 107 #include <mach/port.h>
 108 #include <mach/time_value.h>
 109 #include <mach/message.h>
 110 #include <mach/mach_param.h>
 111 #include <mach/task_info.h>
 112 #include <mach/exception_types.h>
 113 #include <mach/vm_statistics.h>
 114 #include <machine/task.h>
 115
 116 #if MONOTONIC
 117 #include <machine/monotonic.h>
 118 #endif /* MONOTONIC */
 119
 120 #include <kern/cpu_data.h>
 121 #include <kern/queue.h>
 122 #include <kern/exception.h>
 123 #include <kern/locks.h>
 124 #include <security/_label.h>
 125 #include <ipc/ipc_port.h>
 126
 127 #include <kern/thread.h>
 128 #include <mach/coalition.h>
 129 #include <stdatomic.h>
 130 #include <os/refcnt.h>
 131
 132 #ifdef CONFIG_ATM
 133 #include <atm/atm_internal.h>
 134 #endif
 135
 136 struct _cpu_time_qos_stats {
 137         uint64_t cpu_time_qos_default;
 138         uint64_t cpu_time_qos_maintenance;
 139         uint64_t cpu_time_qos_background;
 140         uint64_t cpu_time_qos_utility;
 141         uint64_t cpu_time_qos_legacy;
 142         uint64_t cpu_time_qos_user_initiated;
 143         uint64_t cpu_time_qos_user_interactive;
 144 };
 145
 146 #include <bank/bank_internal.h>
 147
 148 struct task {
 149         /* Synchronization/destruction information */
 150         decl_lck_mtx_data(, lock)                /* Task's lock */
 151         os_refcnt_t     ref_count;      /* Number of references to me */
 152         boolean_t       active;         /* Task has not been terminated */
 153         boolean_t       halting;        /* Task is being halted */
 154         /* Virtual timers */
 155         uint32_t                vtimers;
 156
 157         /* Miscellaneous */
 158         vm_map_t        map;            /* Address space description */
 159         queue_chain_t   tasks;  /* global list of tasks */
 160
 161 #if defined(CONFIG_SCHED_MULTIQ)
 162         sched_group_t sched_group;
 163 #endif /* defined(CONFIG_SCHED_MULTIQ) */
 164
 165         /* Threads in this task */
 166         queue_head_t            threads;
 167
 168         processor_set_t         pset_hint;
 169         struct affinity_space   *affinity_space;
 170
 171         int                     thread_count;
 172         uint32_t                active_thread_count;
 173         int                     suspend_count;  /* Internal scheduling only */
 174
 175         /* User-visible scheduling information */
 176         integer_t               user_stop_count;        /* outstanding stops */
 177         integer_t               legacy_stop_count;      /* outstanding legacy stops */
 178
 179         integer_t               priority;                       /* base priority for threads */
 180         integer_t               max_priority;           /* maximum priority for threads */
 181
 182         integer_t               importance;             /* priority offset (BSD 'nice' value) */
 183
 184         /* Task security and audit tokens */
 185         security_token_t sec_token;
 186         audit_token_t   audit_token;
 187
 188         /* Statistics */
 189         uint64_t                total_user_time;        /* terminated threads only */
 190         uint64_t                total_system_time;
 191         uint64_t                total_ptime;
 192         uint64_t                total_runnable_time;
 193
 194         /* IPC structures */
 195         decl_lck_mtx_data(, itk_lock_data)
 196         struct ipc_port *itk_self;      /* not a right, doesn't hold ref */
 197         struct ipc_port *itk_nself;     /* not a right, doesn't hold ref */
 198         struct ipc_port *itk_sself;     /* a send right */
 199         struct exception_action exc_actions[EXC_TYPES_COUNT];
 200         /* a send right each valid element  */
 201         struct ipc_port *itk_host;      /* a send right */
 202         struct ipc_port *itk_bootstrap; /* a send right */
 203         struct ipc_port *itk_seatbelt;  /* a send right */
 204         struct ipc_port *itk_gssd;      /* yet another send right */
 205         struct ipc_port *itk_debug_control; /* send right for debugmode communications */
 206         struct ipc_port *itk_task_access; /* and another send right */
 207         struct ipc_port *itk_resume;    /* a receive right to resume this task */
 208         struct ipc_port *itk_registered[TASK_PORT_REGISTER_MAX];
 209         /* all send rights */
 210
 211         struct ipc_space *itk_space;
 212
 213         ledger_t        ledger;
 214         /* Synchronizer ownership information */
 215         queue_head_t    semaphore_list;         /* list of owned semaphores   */
 216         int             semaphores_owned;       /* number of semaphores owned */
 217
 218         unsigned int    priv_flags;                     /* privilege resource flags */
 219 #define VM_BACKING_STORE_PRIV   0x1
 220
 221         MACHINE_TASK
 222
 223         integer_t faults;              /* faults counter */
 224         integer_t pageins;             /* pageins counter */
 225         integer_t cow_faults;          /* copy on write fault counter */
 226         integer_t messages_sent;       /* messages sent counter */
 227         integer_t messages_received;   /* messages received counter */
 228         integer_t syscalls_mach;       /* mach system call counter */
 229         integer_t syscalls_unix;       /* unix system call counter */
 230         uint32_t  c_switch;                                /* total context switches */
 231         uint32_t  p_switch;                                /* total processor switches */
 232         uint32_t  ps_switch;                       /* total pset switches */
 233
 234 #ifdef  MACH_BSD
 235         void *bsd_info;
 236 #endif
 237         kcdata_descriptor_t             corpse_info;
 238         uint64_t                        crashed_thread_id;
 239         queue_chain_t                   corpse_tasks;
 240 #ifdef CONFIG_MACF
 241         struct label *                  crash_label;
 242 #endif
 243         struct vm_shared_region         *shared_region;
 244         volatile uint32_t t_flags;                                      /* general-purpose task flags protected by task_lock (TL) */
 245 #define TF_NONE                 0
 246 #define TF_64B_ADDR             0x00000001                              /* task has 64-bit addressing */
 247 #define TF_64B_DATA             0x00000002                              /* task has 64-bit data registers */
 248 #define TF_CPUMON_WARNING       0x00000004                              /* task has at least one thread in CPU usage warning zone */
 249 #define TF_WAKEMON_WARNING      0x00000008                              /* task is in wakeups monitor warning zone */
 250 #define TF_TELEMETRY            (TF_CPUMON_WARNING | TF_WAKEMON_WARNING) /* task is a telemetry participant */
 251 #define TF_GPU_DENIED           0x00000010                              /* task is not allowed to access the GPU */
 252 #define TF_CORPSE               0x00000020                              /* task is a corpse */
 253 #define TF_PENDING_CORPSE       0x00000040                              /* task corpse has not been reported yet */
 254 #define TF_CORPSE_FORK          0x00000080                              /* task is a forked corpse */
 255 #define TF_LRETURNWAIT          0x00000100                              /* task is waiting for fork/posix_spawn/exec to complete */
 256 #define TF_LRETURNWAITER        0x00000200                              /* task is waiting for TF_LRETURNWAIT to get cleared */
 257 #define TF_PLATFORM             0x00000400                              /* task is a platform binary */
 258 #define TF_CA_CLIENT_WI         0x00000800                              /* task has CA_CLIENT work interval */
 259 #define TF_DARKWAKE_MODE        0x00001000                              /* task is in darkwake mode */
 260 #define TF_NO_SMT               0x00002000                              /* task threads must not be paired with SMT threads */
 261
 262 /*
 263  * Task is running within a 64-bit address space.
 264  */
 265 #define task_has_64Bit_addr(task)       \
 266         (((task)->t_flags & TF_64B_ADDR) != 0)
 267 #define task_set_64Bit_addr(task)       \
 268         ((task)->t_flags |= TF_64B_ADDR)
 269 #define task_clear_64Bit_addr(task)     \
 270         ((task)->t_flags &= ~TF_64B_ADDR)
 271
 272 /*
 273  * Task is using 64-bit machine state.
 274  */
 275 #define task_has_64Bit_data(task)       \
 276         (((task)->t_flags & TF_64B_DATA) != 0)
 277 #define task_set_64Bit_data(task)       \
 278         ((task)->t_flags |= TF_64B_DATA)
 279 #define task_clear_64Bit_data(task)     \
 280         ((task)->t_flags &= ~TF_64B_DATA)
 281
 282 #define task_is_a_corpse(task)      \
 283          (((task)->t_flags & TF_CORPSE) != 0)
 284
 285 #define task_set_corpse(task)       \
 286          ((task)->t_flags |= TF_CORPSE)
 287
 288 #define task_corpse_pending_report(task)        \
 289          (((task)->t_flags & TF_PENDING_CORPSE) != 0)
 290
 291 #define task_set_corpse_pending_report(task)       \
 292          ((task)->t_flags |= TF_PENDING_CORPSE)
 293
 294 #define task_clear_corpse_pending_report(task)       \
 295          ((task)->t_flags &= ~TF_PENDING_CORPSE)
 296
 297 #define task_is_a_corpse_fork(task)     \
 298         (((task)->t_flags & TF_CORPSE_FORK) != 0)
 299
 300         uint32_t t_procflags;                                            /* general-purpose task flags protected by proc_lock (PL) */
 301 #define TPF_NONE                 0
 302 #define TPF_DID_EXEC             0x00000001                              /* task has been execed to a new task */
 303 #define TPF_EXEC_COPY            0x00000002                              /* task is the new copy of an exec */
 304 #ifdef CONFIG_32BIT_TELEMETRY
 305 #define TPF_LOG_32BIT_TELEMETRY  0x00000004                              /* task should log identifying information */
 306 #endif
 307
 308 #define task_did_exec_internal(task)            \
 309         (((task)->t_procflags & TPF_DID_EXEC) != 0)
 310
 311 #define task_is_exec_copy_internal(task)        \
 312         (((task)->t_procflags & TPF_EXEC_COPY) != 0)
 313
 314         mach_vm_address_t       all_image_info_addr; /* dyld __all_image_info     */
 315         mach_vm_size_t          all_image_info_size; /* section location and size */
 316
 317 #if KPC
 318 #define TASK_KPC_FORCED_ALL_CTRS        0x2     /* Bit in "t_kpc" signifying this task forced all counters */
 319         uint32_t t_kpc; /* kpc flags */
 320 #endif /* KPC */
 321
 322         boolean_t pidsuspended; /* pid_suspend called; no threads can execute */
 323         boolean_t frozen;       /* frozen; private resident pages committed to swap */
 324         boolean_t changing_freeze_state;        /* in the process of freezing or thawing */
 325         uint16_t policy_ru_cpu          :4,
 326             policy_ru_cpu_ext      :4,
 327             applied_ru_cpu         :4,
 328             applied_ru_cpu_ext     :4;
 329         uint8_t  rusage_cpu_flags;
 330         uint8_t  rusage_cpu_percentage;         /* Task-wide CPU limit percentage */
 331         uint8_t  rusage_cpu_perthr_percentage;  /* Per-thread CPU limit percentage */
 332 #if MACH_ASSERT
 333         int8_t          suspends_outstanding;   /* suspends this task performed in excess of resumes */
 334 #endif
 335         uint64_t rusage_cpu_interval;           /* Task-wide CPU limit interval */
 336         uint64_t rusage_cpu_perthr_interval;    /* Per-thread CPU limit interval */
 337         uint64_t rusage_cpu_deadline;
 338         thread_call_t rusage_cpu_callt;
 339 #if CONFIG_EMBEDDED
 340         queue_head_t    task_watchers;          /* app state watcher threads */
 341         int     num_taskwatchers;
 342         int             watchapplying;
 343 #endif /* CONFIG_EMBEDDED */
 344
 345 #if CONFIG_ATM
 346         struct atm_task_descriptor *atm_context;  /* pointer to per task atm descriptor */
 347 #endif
 348         struct bank_task *bank_context;  /* pointer to per task bank structure */
 349
 350 #if IMPORTANCE_INHERITANCE
 351         struct ipc_importance_task  *task_imp_base;     /* Base of IPC importance chain */
 352 #endif /* IMPORTANCE_INHERITANCE */
 353
 354         vm_extmod_statistics_data_t     extmod_statistics;
 355
 356         struct task_requested_policy requested_policy;
 357         struct task_effective_policy effective_policy;
 358
 359         /*
 360          * Can be merged with imp_donor bits, once the IMPORTANCE_INHERITANCE macro goes away.
 361          */
 362         uint32_t        low_mem_notified_warn           :1,     /* warning low memory notification is sent to the task */
 363             low_mem_notified_critical       :1,                 /* critical low memory notification is sent to the task */
 364             purged_memory_warn              :1,                 /* purgeable memory of the task is purged for warning level pressure */
 365             purged_memory_critical          :1,                 /* purgeable memory of the task is purged for critical level pressure */
 366             low_mem_privileged_listener     :1,                 /* if set, task would like to know about pressure changes before other tasks on the system */
 367             mem_notify_reserved             :27;                /* reserved for future use */
 368
 369         uint32_t memlimit_is_active                 :1, /* if set, use active attributes, otherwise use inactive attributes */
 370             memlimit_is_fatal                   :1,     /* if set, exceeding current memlimit will prove fatal to the task */
 371             memlimit_active_exc_resource        :1,     /* if set, suppress exc_resource exception when task exceeds active memory limit */
 372             memlimit_inactive_exc_resource      :1,     /* if set, suppress exc_resource exception when task exceeds inactive memory limit */
 373             memlimit_attrs_reserved             :28;     /* reserved for future use */
 374
 375         io_stat_info_t          task_io_stats;
 376         uint64_t                task_immediate_writes __attribute__((aligned(8)));
 377         uint64_t                task_deferred_writes __attribute__((aligned(8)));
 378         uint64_t                task_invalidated_writes __attribute__((aligned(8)));
 379         uint64_t                task_metadata_writes __attribute__((aligned(8)));
 380
 381         /*
 382          * The cpu_time_qos_stats fields are protected by the task lock
 383          */
 384         struct _cpu_time_qos_stats      cpu_time_eqos_stats;
 385         struct _cpu_time_qos_stats      cpu_time_rqos_stats;
 386
 387         /* Statistics accumulated for terminated threads from this task */
 388         uint32_t        task_timer_wakeups_bin_1;
 389         uint32_t        task_timer_wakeups_bin_2;
 390         uint64_t        task_gpu_ns;
 391         uint64_t        task_energy;
 392
 393 #if MONOTONIC
 394         /* Read and written under task_lock */
 395         struct mt_task task_monotonic;
 396 #endif /* MONOTONIC */
 397
 398         /* # of purgeable volatile VM objects owned by this task: */
 399         int             task_volatile_objects;
 400         /* # of purgeable but not volatile VM objects owned by this task: */
 401         int             task_nonvolatile_objects;
 402         boolean_t       task_purgeable_disowning;
 403         boolean_t       task_purgeable_disowned;
 404         queue_head_t    task_objq;
 405         decl_lck_mtx_data(, task_objq_lock) /* protects "task_objq" */
 406
 407         unsigned int    task_thread_limit:16;
 408 #if __arm64__
 409         unsigned int    task_legacy_footprint:1;
 410 #endif /* __arm64__ */
 411         unsigned int    task_region_footprint:1;
 412         unsigned int    task_has_crossed_thread_limit:1;
 413         uint32_t        exec_token;
 414         /*
 415          * A task's coalition set is "adopted" in task_create_internal
 416          * and unset in task_deallocate_internal, so each array member
 417          * can be referenced without the task lock.
 418          * Note: these fields are protected by coalition->lock,
 419          *       not the task lock.
 420          */
 421         coalition_t     coalition[COALITION_NUM_TYPES];
 422         queue_chain_t   task_coalition[COALITION_NUM_TYPES];
 423         uint64_t        dispatchqueue_offset;
 424
 425 #if DEVELOPMENT || DEBUG
 426         boolean_t       task_unnested;
 427         int             task_disconnected_count;
 428 #endif
 429
 430 #if HYPERVISOR
 431         void *hv_task_target; /* hypervisor virtual machine object associated with this task */
 432 #endif /* HYPERVISOR */
 433
 434 #if CONFIG_SECLUDED_MEMORY
 435         uint8_t task_can_use_secluded_mem;
 436         uint8_t task_could_use_secluded_mem;
 437         uint8_t task_could_also_use_secluded_mem;
 438         uint8_t task_suppressed_secluded;
 439 #endif /* CONFIG_SECLUDED_MEMORY */
 440
 441         uint32_t task_exc_guard;
 442
 443         queue_head_t    io_user_clients;
 444 };
 445
 446 #define TASK_EXC_GUARD_VM_DELIVER            0x01 /* Deliver virtual memory EXC_GUARD exceptions */
 447 #define TASK_EXC_GUARD_VM_ONCE               0x02 /* Deliver them only once */
 448 #define TASK_EXC_GUARD_VM_CORPSE             0x04 /* Deliver them via a forked corpse */
 449 #define TASK_EXC_GUARD_VM_FATAL              0x08 /* Virtual Memory EXC_GUARD delivery is fatal */
 450 #define TASK_EXC_GUARD_VM_ALL                0x0f
 451
 452 #define TASK_EXC_GUARD_MP_DELIVER            0x10 /* Deliver mach port EXC_GUARD exceptions */
 453 #define TASK_EXC_GUARD_MP_ONCE               0x20 /* Deliver them only once */
 454 #define TASK_EXC_GUARD_MP_CORPSE             0x04 /* Deliver them via a forked corpse */
 455 #define TASK_EXC_GUARD_MP_FATAL              0x80 /* mach port EXC_GUARD delivery is fatal */
 456
 457 extern uint32_t task_exc_guard_default;
 458
 459 extern kern_return_t
 460     task_violated_guard(mach_exception_code_t, mach_exception_subcode_t, void *);
 461
 462 #define task_lock(task)                 lck_mtx_lock(&(task)->lock)
 463 #define task_lock_assert_owned(task)    LCK_MTX_ASSERT(&(task)->lock, LCK_MTX_ASSERT_OWNED)
 464 #define task_lock_try(task)             lck_mtx_try_lock(&(task)->lock)
 465 #define task_unlock(task)               lck_mtx_unlock(&(task)->lock)
 466
 467 #define task_objq_lock_init(task)       lck_mtx_init(&(task)->task_objq_lock, &vm_object_lck_grp, &vm_object_lck_attr)
 468 #define task_objq_lock(task)            lck_mtx_lock(&(task)->task_objq_lock)
 469 #define task_objq_lock_assert_owned(task)       LCK_MTX_ASSERT(&(task)->task_objq_lock, LCK_MTX_ASSERT_OWNED)
 470 #define task_objq_lock_try(task)        lck_mtx_try_lock(&(task)->task_objq_lock)
 471 #define task_objq_unlock(task)          lck_mtx_unlock(&(task)->task_objq_lock)
 472
 473 #define itk_lock_init(task)     lck_mtx_init(&(task)->itk_lock_data, &ipc_lck_grp, &ipc_lck_attr)
 474 #define itk_lock_destroy(task)  lck_mtx_destroy(&(task)->itk_lock_data, &ipc_lck_grp)
 475 #define itk_lock(task)          lck_mtx_lock(&(task)->itk_lock_data)
 476 #define itk_unlock(task)        lck_mtx_unlock(&(task)->itk_lock_data)
 477
 478 #define TASK_REFERENCE_LEAK_DEBUG 0
 479
 480 #if TASK_REFERENCE_LEAK_DEBUG
 481 extern void task_reference_internal(task_t task);
 482 extern os_ref_count_t task_deallocate_internal(task_t task);
 483 #else
 484 #define task_reference_internal(task) os_ref_retain(&(task)->ref_count)
 485 #define task_deallocate_internal(task) os_ref_release(&(task)->ref_count)
 486 #endif
 487
 488 #define task_reference(task)                                    \
 489 MACRO_BEGIN                                                                             \
 490         if ((task) != TASK_NULL)                                        \
 491                 task_reference_internal(task);                  \
 492 MACRO_END
 493
 494 extern kern_return_t    kernel_task_create(
 495         task_t                  task,
 496         vm_offset_t             map_base,
 497         vm_size_t               map_size,
 498         task_t                  *child);
 499
 500 /* Initialize task module */
 501 extern void             task_init(void);
 502
 503 /* coalition_init() calls this to initialize ledgers before task_init() */
 504 extern void             init_task_ledgers(void);
 505
 506 #define current_task_fast()     (current_thread()->task)
 507 #define current_task()          current_task_fast()
 508
 509 extern lck_attr_t      task_lck_attr;
 510 extern lck_grp_t       task_lck_grp;
 511
 512 #else   /* MACH_KERNEL_PRIVATE */
 513
 514 __BEGIN_DECLS
 515
 516 extern task_t   current_task(void);
 517
 518 extern void             task_reference(task_t   task);
 519
 520 #define TF_NONE                 0
 521 #define TF_LRETURNWAIT          0x00000100                              /* task is waiting for fork/posix_spawn/exec to complete */
 522 #define TF_LRETURNWAITER        0x00000200                              /* task is waiting for TF_LRETURNWAIT to get cleared */
 523
 524 #define TPF_NONE                0
 525 #define TPF_EXEC_COPY           0x00000002                              /* task is the new copy of an exec */
 526
 527
 528 __END_DECLS
 529
 530 #endif  /* MACH_KERNEL_PRIVATE */
 531
 532 __BEGIN_DECLS
 533
 534 #ifdef  XNU_KERNEL_PRIVATE
 535
 536 /* Hold all threads in a task */
 537 extern kern_return_t    task_hold(
 538         task_t          task);
 539
 540 /* Wait for task to stop running, either just to get off CPU or to cease being runnable */
 541 extern kern_return_t    task_wait(
 542         task_t          task,
 543         boolean_t       until_not_runnable);
 544
 545 /* Release hold on all threads in a task */
 546 extern kern_return_t    task_release(
 547         task_t          task);
 548
 549 /* Suspend/resume a task where the kernel owns the suspend count */
 550 extern kern_return_t    task_suspend_internal(          task_t          task);
 551 extern kern_return_t    task_resume_internal(           task_t          task);
 552
 553 /* Suspends a task by placing a hold on its threads */
 554 extern kern_return_t    task_pidsuspend(
 555         task_t          task);
 556 extern kern_return_t    task_pidsuspend_locked(
 557         task_t          task);
 558
 559 /* Resumes a previously paused task */
 560 extern kern_return_t    task_pidresume(
 561         task_t          task);
 562
 563 extern kern_return_t    task_send_trace_memory(
 564         task_t          task,
 565         uint32_t        pid,
 566         uint64_t        uniqueid);
 567
 568 #if DEVELOPMENT || DEBUG
 569
 570 extern kern_return_t    task_disconnect_page_mappings(
 571         task_t          task);
 572 #endif
 573
 574 extern void                     tasks_system_suspend(boolean_t suspend);
 575
 576 #if CONFIG_FREEZE
 577
 578 /* Freeze a task's resident pages */
 579 extern kern_return_t    task_freeze(
 580         task_t          task,
 581         uint32_t        *purgeable_count,
 582         uint32_t        *wired_count,
 583         uint32_t        *clean_count,
 584         uint32_t        *dirty_count,
 585         uint32_t        dirty_budget,
 586         uint32_t        *shared_count,
 587         int             *freezer_error_code,
 588         boolean_t       eval_only);
 589
 590 /* Thaw a currently frozen task */
 591 extern kern_return_t    task_thaw(
 592         task_t          task);
 593
 594 #endif /* CONFIG_FREEZE */
 595
 596 /* Halt all other threads in the current task */
 597 extern kern_return_t    task_start_halt(
 598         task_t          task);
 599
 600 /* Wait for other threads to halt and free halting task resources */
 601 extern void             task_complete_halt(
 602         task_t          task);
 603
 604 extern kern_return_t    task_terminate_internal(
 605         task_t                  task);
 606
 607 extern kern_return_t    task_create_internal(
 608         task_t          parent_task,
 609         coalition_t     *parent_coalitions,
 610         boolean_t       inherit_memory,
 611         boolean_t       is_64bit,
 612         boolean_t       is_64bit_data,
 613         uint32_t        flags,
 614         uint32_t        procflags,
 615         task_t          *child_task);                                                   /* OUT */
 616
 617 extern kern_return_t    task_info(
 618         task_t                  task,
 619         task_flavor_t           flavor,
 620         task_info_t             task_info_out,
 621         mach_msg_type_number_t  *task_info_count);
 622
 623 extern void             task_power_info_locked(
 624         task_t                  task,
 625         task_power_info_t       info,
 626         gpu_energy_data_t       gpu_energy,
 627         task_power_info_v2_t    infov2);
 628
 629 extern uint64_t         task_gpu_utilisation(
 630         task_t   task);
 631
 632 extern uint64_t         task_energy(
 633         task_t   task);
 634
 635 extern uint64_t         task_cpu_ptime(
 636         task_t   task);
 637 extern void             task_update_cpu_time_qos_stats(
 638         task_t   task,
 639         uint64_t *eqos_stats,
 640         uint64_t *rqos_stats);
 641
 642 extern void             task_vtimer_set(
 643         task_t          task,
 644         integer_t       which);
 645
 646 extern void             task_vtimer_clear(
 647         task_t          task,
 648         integer_t       which);
 649
 650 extern void             task_vtimer_update(
 651         task_t          task,
 652         integer_t       which,
 653         uint32_t        *microsecs);
 654
 655 #define TASK_VTIMER_USER                0x01
 656 #define TASK_VTIMER_PROF                0x02
 657 #define TASK_VTIMER_RLIM                0x04
 658
 659 extern void             task_set_64bit(
 660         task_t          task,
 661         boolean_t       is_64bit,
 662         boolean_t       is_64bit_data);
 663
 664 extern boolean_t        task_get_64bit_data(
 665         task_t task);
 666
 667 extern void     task_set_platform_binary(
 668         task_t task,
 669         boolean_t is_platform);
 670 extern bool     task_set_ca_client_wi(
 671         task_t task,
 672         boolean_t ca_client_wi);
 673
 674 extern void             task_set_dyld_info(
 675         task_t          task,
 676         mach_vm_address_t addr,
 677         mach_vm_size_t size);
 678
 679 /* Get number of activations in a task */
 680 extern int              get_task_numacts(
 681         task_t          task);
 682
 683 extern int get_task_numactivethreads(task_t task);
 684
 685 struct label;
 686 extern kern_return_t task_collect_crash_info(
 687         task_t task,
 688 #if CONFIG_MACF
 689         struct label *crash_label,
 690 #endif
 691         int is_corpse_fork);
 692 void task_port_notify(mach_msg_header_t *msg);
 693 void task_wait_till_threads_terminate_locked(task_t task);
 694
 695 /* JMM - should just be temporary (implementation in bsd_kern still) */
 696 extern void     set_bsdtask_info(task_t, void *);
 697 extern vm_map_t get_task_map_reference(task_t);
 698 extern vm_map_t swap_task_map(task_t, thread_t, vm_map_t);
 699 extern pmap_t   get_task_pmap(task_t);
 700 extern uint64_t get_task_resident_size(task_t);
 701 extern uint64_t get_task_compressed(task_t);
 702 extern uint64_t get_task_resident_max(task_t);
 703 extern uint64_t get_task_phys_footprint(task_t);
 704 #if CONFIG_LEDGER_INTERVAL_MAX
 705 extern uint64_t get_task_phys_footprint_interval_max(task_t, int reset);
 706 #endif /* CONFIG_FOOTPRINT_INTERVAL_MAX */
 707 extern uint64_t get_task_phys_footprint_lifetime_max(task_t);
 708 extern uint64_t get_task_phys_footprint_limit(task_t);
 709 extern uint64_t get_task_purgeable_size(task_t);
 710 extern uint64_t get_task_cpu_time(task_t);
 711 extern uint64_t get_task_dispatchqueue_offset(task_t);
 712 extern uint64_t get_task_dispatchqueue_serialno_offset(task_t);
 713 extern uint64_t get_task_uniqueid(task_t task);
 714 extern int      get_task_version(task_t task);
 715
 716 extern uint64_t get_task_internal(task_t);
 717 extern uint64_t get_task_internal_compressed(task_t);
 718 extern uint64_t get_task_purgeable_nonvolatile(task_t);
 719 extern uint64_t get_task_purgeable_nonvolatile_compressed(task_t);
 720 extern uint64_t get_task_iokit_mapped(task_t);
 721 extern uint64_t get_task_alternate_accounting(task_t);
 722 extern uint64_t get_task_alternate_accounting_compressed(task_t);
 723 extern uint64_t get_task_memory_region_count(task_t);
 724 extern uint64_t get_task_page_table(task_t);
 725 extern uint64_t get_task_network_nonvolatile(task_t);
 726 extern uint64_t get_task_network_nonvolatile_compressed(task_t);
 727 extern uint64_t get_task_wired_mem(task_t);
 728
 729 extern kern_return_t task_convert_phys_footprint_limit(int, int *);
 730 extern kern_return_t task_set_phys_footprint_limit_internal(task_t, int, int *, boolean_t, boolean_t);
 731 extern kern_return_t task_get_phys_footprint_limit(task_t task, int *limit_mb);
 732
 733 /* Jetsam memlimit attributes */
 734 extern boolean_t task_get_memlimit_is_active(task_t task);
 735 extern boolean_t task_get_memlimit_is_fatal(task_t task);
 736 extern void task_set_memlimit_is_active(task_t task, boolean_t memlimit_is_active);
 737 extern void task_set_memlimit_is_fatal(task_t task, boolean_t memlimit_is_fatal);
 738 extern boolean_t task_has_triggered_exc_resource(task_t task, boolean_t memlimit_is_active);
 739 extern void task_mark_has_triggered_exc_resource(task_t task, boolean_t memlimit_is_active);
 740
 741 extern void task_set_thread_limit(task_t task, uint16_t thread_limit);
 742
 743
 744 extern boolean_t        is_kerneltask(task_t task);
 745 extern boolean_t        is_corpsetask(task_t task);
 746
 747 extern kern_return_t check_actforsig(task_t task, thread_t thread, int setast);
 748
 749 extern kern_return_t machine_task_get_state(
 750         task_t task,
 751         int flavor,
 752         thread_state_t state,
 753         mach_msg_type_number_t *state_count);
 754
 755 extern kern_return_t machine_task_set_state(
 756         task_t task,
 757         int flavor,
 758         thread_state_t state,
 759         mach_msg_type_number_t state_count);
 760
 761 extern void machine_task_terminate(task_t task);
 762
 763 struct _task_ledger_indices {
 764         int cpu_time;
 765         int tkm_private;
 766         int tkm_shared;
 767         int phys_mem;
 768         int wired_mem;
 769         int internal;
 770         int iokit_mapped;
 771         int alternate_accounting;
 772         int alternate_accounting_compressed;
 773         int page_table;
 774         int phys_footprint;
 775         int internal_compressed;
 776         int purgeable_volatile;
 777         int purgeable_nonvolatile;
 778         int purgeable_volatile_compressed;
 779         int purgeable_nonvolatile_compressed;
 780         int network_volatile;
 781         int network_nonvolatile;
 782         int network_volatile_compressed;
 783         int network_nonvolatile_compressed;
 784         int platform_idle_wakeups;
 785         int interrupt_wakeups;
 786 #if CONFIG_SCHED_SFI
 787         int sfi_wait_times[MAX_SFI_CLASS_ID];
 788 #endif /* CONFIG_SCHED_SFI */
 789         int cpu_time_billed_to_me;
 790         int cpu_time_billed_to_others;
 791         int physical_writes;
 792         int logical_writes;
 793         int energy_billed_to_me;
 794         int energy_billed_to_others;
 795         int pages_grabbed;
 796         int pages_grabbed_kern;
 797         int pages_grabbed_iopl;
 798         int pages_grabbed_upl;
 799 };
 800 extern struct _task_ledger_indices task_ledgers;
 801
 802 /* requires task to be unlocked, returns a referenced thread */
 803 thread_t task_findtid(task_t task, uint64_t tid);
 804 int pid_from_task(task_t task);
 805
 806 extern kern_return_t task_wakeups_monitor_ctl(task_t task, uint32_t *rate_hz, int32_t *flags);
 807 extern kern_return_t task_cpu_usage_monitor_ctl(task_t task, uint32_t *flags);
 808 extern void task_rollup_accounting_info(task_t new_task, task_t parent_task);
 809 extern kern_return_t task_io_monitor_ctl(task_t task, uint32_t *flags);
 810 extern void task_set_did_exec_flag(task_t task);
 811 extern void task_clear_exec_copy_flag(task_t task);
 812 extern boolean_t task_is_exec_copy(task_t);
 813 extern boolean_t task_did_exec(task_t task);
 814 #ifdef CONFIG_32BIT_TELEMETRY
 815 extern boolean_t task_consume_32bit_log_flag(task_t task);
 816 extern void task_set_32bit_log_flag(task_t task);
 817 #endif /* CONFIG_32BIT_TELEMETRY */
 818 extern boolean_t task_is_active(task_t task);
 819 extern boolean_t task_is_halting(task_t task);
 820 extern void task_clear_return_wait(task_t task);
 821 extern void task_wait_to_return(void) __attribute__((noreturn));
 822 extern event_t task_get_return_wait_event(task_t task);
 823
 824 extern void task_atm_reset(task_t task);
 825 extern void task_bank_reset(task_t task);
 826 extern void task_bank_init(task_t task);
 827
 828 extern int task_pid(task_t task);
 829 extern boolean_t task_has_assertions(task_t task);
 830 /* End task_policy */
 831
 832 extern void      task_set_gpu_denied(task_t task, boolean_t denied);
 833 extern boolean_t task_is_gpu_denied(task_t task);
 834
 835 extern queue_head_t * task_io_user_clients(task_t task);
 836
 837 extern void task_copy_fields_for_exec(task_t dst_task, task_t src_task);
 838
 839 #endif  /* XNU_KERNEL_PRIVATE */
 840
 841 #ifdef  KERNEL_PRIVATE
 842
 843 extern void     *get_bsdtask_info(task_t);
 844 extern void     *get_bsdthreadtask_info(thread_t);
 845 extern void task_bsdtask_kill(task_t);
 846 extern vm_map_t get_task_map(task_t);
 847 extern ledger_t get_task_ledger(task_t);
 848
 849 extern boolean_t get_task_pidsuspended(task_t);
 850 extern boolean_t get_task_frozen(task_t);
 851
 852 /* Convert from a task to a port */
 853 extern ipc_port_t convert_task_to_port(task_t);
 854 extern ipc_port_t convert_task_name_to_port(task_name_t);
 855 extern ipc_port_t convert_task_inspect_to_port(task_inspect_t);
 856 extern ipc_port_t convert_task_suspension_token_to_port(task_suspension_token_t task);
 857
 858 /* Convert from a port (in this case, an SO right to a task's resume port) to a task. */
 859 extern task_suspension_token_t convert_port_to_task_suspension_token(ipc_port_t port);
 860
 861 extern boolean_t task_suspension_notify(mach_msg_header_t *);
 862
 863 #define TASK_WRITE_IMMEDIATE            0x1
 864 #define TASK_WRITE_DEFERRED             0x2
 865 #define TASK_WRITE_INVALIDATED          0x4
 866 #define TASK_WRITE_METADATA             0x8
 867 extern void     task_update_logical_writes(task_t task, uint32_t io_size, int flags, void *vp);
 868
 869 #if CONFIG_SECLUDED_MEMORY
 870 extern void task_set_can_use_secluded_mem(
 871         task_t task,
 872         boolean_t can_use_secluded_mem);
 873 extern void task_set_could_use_secluded_mem(
 874         task_t task,
 875         boolean_t could_use_secluded_mem);
 876 extern void task_set_could_also_use_secluded_mem(
 877         task_t task,
 878         boolean_t could_also_use_secluded_mem);
 879 extern boolean_t task_can_use_secluded_mem(
 880         task_t task,
 881         boolean_t is_allocate);
 882 extern boolean_t task_could_use_secluded_mem(task_t task);
 883 #endif /* CONFIG_SECLUDED_MEMORY */
 884
 885 extern void task_set_darkwake_mode(task_t, boolean_t);
 886 extern boolean_t task_get_darkwake_mode(task_t);
 887
 888 #if __arm64__
 889 extern void task_set_legacy_footprint(task_t task, boolean_t new_val);
 890 #endif /* __arm64__ */
 891
 892 #if CONFIG_MACF
 893 extern struct label *get_task_crash_label(task_t task);
 894 #endif /* CONFIG_MACF */
 895
 896 #endif  /* KERNEL_PRIVATE */
 897
 898 extern task_t   kernel_task;
 899
 900 extern void             task_deallocate(
 901         task_t          task);
 902
 903 extern void             task_name_deallocate(
 904         task_name_t             task_name);
 905
 906 extern void             task_inspect_deallocate(
 907         task_inspect_t          task_inspect);
 908
 909 extern void             task_suspension_token_deallocate(
 910         task_suspension_token_t token);
 911
 912 extern boolean_t task_self_region_footprint(void);
 913 extern void task_self_region_footprint_set(boolean_t newval);
 914
 915 __END_DECLS
 916
 917 #endif  /* _KERN_TASK_H_ */