osfmk/kern/task.h

   1 /*
   2  * Copyright (c) 2000-2010, 2015 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
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  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
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  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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  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  MACH_KERNEL_PRIVATE
  99
 100 #include <mach/boolean.h>
 101 #include <mach/port.h>
 102 #include <mach/time_value.h>
 103 #include <mach/message.h>
 104 #include <mach/mach_param.h>
 105 #include <mach/task_info.h>
 106 #include <mach/exception_types.h>
 107 #include <mach/vm_statistics.h>
 108 #include <machine/task.h>
 109
 110 #include <kern/cpu_data.h>
 111 #include <kern/queue.h>
 112 #include <kern/exception.h>
 113 #include <kern/locks.h>
 114 #include <security/_label.h>
 115 #include <ipc/ipc_port.h>
 116 #endif /* MACH_KERNEL_PRIVATE */
 117
 118 #ifdef XNU_KERNEL_PRIVATE
 119
 120 #include <kern/kern_cdata.h>
 121 #include <mach/sfi_class.h>
 122 #include <kern/queue.h>
 123
 124 /* defns for task->rsu_controldata */
 125 #define TASK_POLICY_CPU_RESOURCE_USAGE          0
 126 #define TASK_POLICY_WIREDMEM_RESOURCE_USAGE     1
 127 #define TASK_POLICY_VIRTUALMEM_RESOURCE_USAGE   2
 128 #define TASK_POLICY_DISK_RESOURCE_USAGE         3
 129 #define TASK_POLICY_NETWORK_RESOURCE_USAGE      4
 130 #define TASK_POLICY_POWER_RESOURCE_USAGE        5
 131
 132 #define TASK_POLICY_RESOURCE_USAGE_COUNT 6
 133
 134 #define TASK_POLICY_CPUMON_DISABLE                      0xFF
 135 #define TASK_POLICY_CPUMON_DEFAULTS                     0xFE
 136
 137 /* Resource usage/low resource attributes */
 138 #define TASK_POLICY_RESOURCE_ATTRIBUTE_NONE             0x00
 139 #define TASK_POLICY_RESOURCE_ATTRIBUTE_THROTTLE         0x01
 140 #define TASK_POLICY_RESOURCE_ATTRIBUTE_SUSPEND          0x02
 141 #define TASK_POLICY_RESOURCE_ATTRIBUTE_TERMINATE        0x03
 142 #define TASK_POLICY_RESOURCE_ATTRIBUTE_NOTIFY_KQ        0x04
 143 #define TASK_POLICY_RESOURCE_ATTRIBUTE_NOTIFY_EXC       0x05
 144 #define TASK_POLICY_RESOURCE_ATTRIBUTE_DEFAULT          TASK_POLICY_RESOURCE_ATTRIBUTE_NONE
 145
 146 #endif /* XNU_KERNEL_PRIVATE */
 147
 148 #ifdef MACH_KERNEL_PRIVATE
 149
 150
 151 #include <kern/thread.h>
 152 #include <mach/coalition.h>
 153
 154 #ifdef CONFIG_ATM
 155 #include <atm/atm_internal.h>
 156 #endif
 157
 158 struct _cpu_time_qos_stats {
 159         uint64_t cpu_time_qos_default;
 160         uint64_t cpu_time_qos_maintenance;
 161         uint64_t cpu_time_qos_background;
 162         uint64_t cpu_time_qos_utility;
 163         uint64_t cpu_time_qos_legacy;
 164         uint64_t cpu_time_qos_user_initiated;
 165         uint64_t cpu_time_qos_user_interactive;
 166 };
 167
 168 #ifdef CONFIG_BANK
 169 #include <bank/bank_internal.h>
 170 #endif
 171
 172 struct task {
 173         /* Synchronization/destruction information */
 174         decl_lck_mtx_data(,lock)                /* Task's lock */
 175         uint32_t        ref_count;      /* Number of references to me */
 176         boolean_t       active;         /* Task has not been terminated */
 177         boolean_t       halting;        /* Task is being halted */
 178
 179         /* Miscellaneous */
 180         vm_map_t        map;            /* Address space description */
 181         queue_chain_t   tasks;  /* global list of tasks */
 182         void            *user_data;     /* Arbitrary data settable via IPC */
 183
 184 #if defined(CONFIG_SCHED_MULTIQ)
 185         sched_group_t sched_group;
 186 #endif /* defined(CONFIG_SCHED_MULTIQ) */
 187
 188         /* Threads in this task */
 189         queue_head_t            threads;
 190
 191         processor_set_t         pset_hint;
 192         struct affinity_space   *affinity_space;
 193
 194         int                     thread_count;
 195         uint32_t                active_thread_count;
 196         int                     suspend_count;  /* Internal scheduling only */
 197
 198         /* User-visible scheduling information */
 199         integer_t               user_stop_count;        /* outstanding stops */
 200         integer_t               legacy_stop_count;      /* outstanding legacy stops */
 201
 202         integer_t               priority;                       /* base priority for threads */
 203         integer_t               max_priority;           /* maximum priority for threads */
 204
 205         integer_t               importance;             /* priority offset (BSD 'nice' value) */
 206
 207         /* Task security and audit tokens */
 208         security_token_t sec_token;
 209         audit_token_t   audit_token;
 210
 211         /* Statistics */
 212         uint64_t                total_user_time;        /* terminated threads only */
 213         uint64_t                total_system_time;
 214
 215         /* Virtual timers */
 216         uint32_t                vtimers;
 217
 218         /* IPC structures */
 219         decl_lck_mtx_data(,itk_lock_data)
 220         struct ipc_port *itk_self;      /* not a right, doesn't hold ref */
 221         struct ipc_port *itk_nself;     /* not a right, doesn't hold ref */
 222         struct ipc_port *itk_sself;     /* a send right */
 223         struct exception_action exc_actions[EXC_TYPES_COUNT];
 224                                         /* a send right each valid element  */
 225         struct ipc_port *itk_host;      /* a send right */
 226         struct ipc_port *itk_bootstrap; /* a send right */
 227         struct ipc_port *itk_seatbelt;  /* a send right */
 228         struct ipc_port *itk_gssd;      /* yet another send right */
 229         struct ipc_port *itk_debug_control; /* send right for debugmode communications */
 230         struct ipc_port *itk_task_access; /* and another send right */
 231         struct ipc_port *itk_resume;    /* a receive right to resume this task */
 232         struct ipc_port *itk_registered[TASK_PORT_REGISTER_MAX];
 233                                         /* all send rights */
 234
 235         struct ipc_space *itk_space;
 236
 237         /* Synchronizer ownership information */
 238         queue_head_t    semaphore_list;         /* list of owned semaphores   */
 239         int             semaphores_owned;       /* number of semaphores owned */
 240
 241         ledger_t        ledger;
 242
 243         unsigned int    priv_flags;                     /* privilege resource flags */
 244 #define VM_BACKING_STORE_PRIV   0x1
 245
 246         MACHINE_TASK
 247
 248         integer_t faults;              /* faults counter */
 249         integer_t pageins;             /* pageins counter */
 250         integer_t cow_faults;          /* copy on write fault counter */
 251         integer_t messages_sent;       /* messages sent counter */
 252         integer_t messages_received;   /* messages received counter */
 253         integer_t syscalls_mach;       /* mach system call counter */
 254         integer_t syscalls_unix;       /* unix system call counter */
 255                 uint32_t  c_switch;                        /* total context switches */
 256                 uint32_t  p_switch;                        /* total processor switches */
 257                 uint32_t  ps_switch;               /* total pset switches */
 258
 259         zinfo_usage_t tkm_zinfo;        /* per-task, per-zone usage statistics */
 260
 261 #ifdef  MACH_BSD
 262         void *bsd_info;
 263 #endif
 264         kcdata_descriptor_t             corpse_info;
 265         struct vm_shared_region         *shared_region;
 266         volatile uint32_t t_flags;                                      /* general-purpose task flags protected by task_lock (TL) */
 267 #define TF_64B_ADDR             0x00000001                              /* task has 64-bit addressing */
 268 #define TF_64B_DATA             0x00000002                              /* task has 64-bit data registers */
 269 #define TF_CPUMON_WARNING       0x00000004                              /* task has at least one thread in CPU usage warning zone */
 270 #define TF_WAKEMON_WARNING      0x00000008                              /* task is in wakeups monitor warning zone */
 271 #define TF_TELEMETRY            (TF_CPUMON_WARNING | TF_WAKEMON_WARNING) /* task is a telemetry participant */
 272 #define TF_GPU_DENIED           0x00000010                              /* task is not allowed to access the GPU */
 273 #define TF_CORPSE               0x00000020                              /* task is a corpse */
 274 #define TF_PENDING_CORPSE       0x00000040                              /* task corpse has not been reported yet */
 275
 276 #define task_has_64BitAddr(task)        \
 277          (((task)->t_flags & TF_64B_ADDR) != 0)
 278 #define task_set_64BitAddr(task)        \
 279          ((task)->t_flags |= TF_64B_ADDR)
 280 #define task_clear_64BitAddr(task)      \
 281          ((task)->t_flags &= ~TF_64B_ADDR)
 282 #define task_has_64BitData(task)    \
 283          (((task)->t_flags & TF_64B_DATA) != 0)
 284
 285 #define task_is_a_corpse(task)      \
 286          (((task)->t_flags & TF_CORPSE) != 0)
 287
 288 #define task_set_corpse(task)       \
 289          ((task)->t_flags |= TF_CORPSE)
 290
 291 #define task_corpse_pending_report(task)        \
 292          (((task)->t_flags & TF_PENDING_CORPSE) != 0)
 293
 294 #define task_set_corpse_pending_report(task)       \
 295          ((task)->t_flags |= TF_PENDING_CORPSE)
 296
 297 #define task_clear_corpse_pending_report(task)       \
 298          ((task)->t_flags &= ~TF_PENDING_CORPSE)
 299
 300         mach_vm_address_t       all_image_info_addr; /* dyld __all_image_info     */
 301         mach_vm_size_t          all_image_info_size; /* section location and size */
 302
 303 #if KPERF
 304 #define TASK_PMC_FLAG                   0x1     /* Bit in "t_chud" signifying PMC interest */
 305 #define TASK_KPC_FORCED_ALL_CTRS        0x2     /* Bit in "t_chud" signifying KPC forced all counters */
 306
 307         uint32_t t_chud;                /* CHUD flags, used for Shark */
 308 #endif
 309
 310         boolean_t pidsuspended; /* pid_suspend called; no threads can execute */
 311         boolean_t frozen;       /* frozen; private resident pages committed to swap */
 312         boolean_t changing_freeze_state;        /* in the process of freezing or thawing */
 313         uint16_t policy_ru_cpu          :4,
 314                  policy_ru_cpu_ext      :4,
 315                  applied_ru_cpu         :4,
 316                  applied_ru_cpu_ext     :4;
 317         uint8_t  rusage_cpu_flags;
 318         uint8_t  rusage_cpu_percentage;         /* Task-wide CPU limit percentage */
 319         uint64_t rusage_cpu_interval;           /* Task-wide CPU limit interval */
 320         uint8_t  rusage_cpu_perthr_percentage;  /* Per-thread CPU limit percentage */
 321         uint64_t rusage_cpu_perthr_interval;    /* Per-thread CPU limit interval */
 322         uint64_t rusage_cpu_deadline;
 323         thread_call_t rusage_cpu_callt;
 324
 325 #if CONFIG_ATM
 326         struct atm_task_descriptor *atm_context;  /* pointer to per task atm descriptor */
 327 #endif
 328 #if CONFIG_BANK
 329         struct bank_task *bank_context;  /* pointer to per task bank structure */
 330 #endif
 331
 332 #if IMPORTANCE_INHERITANCE
 333         struct ipc_importance_task  *task_imp_base;     /* Base of IPC importance chain */
 334 #endif /* IMPORTANCE_INHERITANCE */
 335
 336         vm_extmod_statistics_data_t     extmod_statistics;
 337
 338 #if MACH_ASSERT
 339         int8_t          suspends_outstanding;   /* suspends this task performed in excess of resumes */
 340 #endif
 341
 342         struct task_requested_policy requested_policy;
 343         struct task_effective_policy effective_policy;
 344         struct task_pended_policy    pended_policy;
 345
 346         /*
 347          * Can be merged with imp_donor bits, once the IMPORTANCE_INHERITANCE macro goes away.
 348          */
 349         uint32_t        low_mem_notified_warn           :1,     /* warning low memory notification is sent to the task */
 350                         low_mem_notified_critical       :1,     /* critical low memory notification is sent to the task */
 351                         purged_memory_warn              :1,     /* purgeable memory of the task is purged for warning level pressure */
 352                         purged_memory_critical          :1,     /* purgeable memory of the task is purged for critical level pressure */
 353                         low_mem_privileged_listener     :1,     /* if set, task would like to know about pressure changes before other tasks on the system */
 354                         mem_notify_reserved             :27;    /* reserved for future use */
 355
 356         io_stat_info_t          task_io_stats;
 357         uint64_t                task_immediate_writes __attribute__((aligned(8)));
 358         uint64_t                task_deferred_writes __attribute__((aligned(8)));
 359         uint64_t                task_invalidated_writes __attribute__((aligned(8)));
 360         uint64_t                task_metadata_writes __attribute__((aligned(8)));
 361
 362         /*
 363          * The cpu_time_qos_stats fields are protected by the task lock
 364          */
 365         struct _cpu_time_qos_stats      cpu_time_qos_stats;
 366
 367         /* Statistics accumulated for terminated threads from this task */
 368         uint32_t        task_timer_wakeups_bin_1;
 369         uint32_t        task_timer_wakeups_bin_2;
 370         uint64_t        task_gpu_ns;
 371
 372         /* # of purgeable volatile VM objects owned by this task: */
 373         int             task_volatile_objects;
 374         /* # of purgeable but not volatile VM objects owned by this task: */
 375         int             task_nonvolatile_objects;
 376         boolean_t       task_purgeable_disowning;
 377         boolean_t       task_purgeable_disowned;
 378
 379         /*
 380          * A task's coalition set is "adopted" in task_create_internal
 381          * and unset in task_deallocate_internal, so each array member
 382          * can be referenced without the task lock.
 383          * Note: these fields are protected by coalition->lock,
 384          *       not the task lock.
 385          */
 386         coalition_t     coalition[COALITION_NUM_TYPES];
 387         queue_chain_t   task_coalition[COALITION_NUM_TYPES];
 388         uint64_t        dispatchqueue_offset;
 389
 390 #if HYPERVISOR
 391         void *hv_task_target; /* hypervisor virtual machine object associated with this task */
 392 #endif /* HYPERVISOR */
 393
 394         queue_head_t    io_user_clients;
 395 };
 396
 397 #define task_lock(task)                 lck_mtx_lock(&(task)->lock)
 398 #define task_lock_assert_owned(task)    lck_mtx_assert(&(task)->lock, LCK_MTX_ASSERT_OWNED)
 399 #define task_lock_try(task)             lck_mtx_try_lock(&(task)->lock)
 400 #define task_unlock(task)               lck_mtx_unlock(&(task)->lock)
 401
 402 #define itk_lock_init(task)     lck_mtx_init(&(task)->itk_lock_data, &ipc_lck_grp, &ipc_lck_attr)
 403 #define itk_lock_destroy(task)  lck_mtx_destroy(&(task)->itk_lock_data, &ipc_lck_grp)
 404 #define itk_lock(task)          lck_mtx_lock(&(task)->itk_lock_data)
 405 #define itk_unlock(task)        lck_mtx_unlock(&(task)->itk_lock_data)
 406
 407 #define TASK_REFERENCE_LEAK_DEBUG 0
 408
 409 #if TASK_REFERENCE_LEAK_DEBUG
 410 extern void task_reference_internal(task_t task);
 411 extern uint32_t task_deallocate_internal(task_t task);
 412 #else
 413 #define task_reference_internal(task)           \
 414                         (void)hw_atomic_add(&(task)->ref_count, 1)
 415
 416 #define task_deallocate_internal(task)          \
 417                         hw_atomic_sub(&(task)->ref_count, 1)
 418 #endif
 419
 420 #define task_reference(task)                                    \
 421 MACRO_BEGIN                                                                             \
 422         if ((task) != TASK_NULL)                                        \
 423                 task_reference_internal(task);                  \
 424 MACRO_END
 425
 426 extern kern_return_t    kernel_task_create(
 427                                                         task_t                  task,
 428                                                         vm_offset_t             map_base,
 429                                                         vm_size_t               map_size,
 430                                                         task_t                  *child);
 431
 432 /* Initialize task module */
 433 extern void             task_init(void);
 434
 435 /* coalition_init() calls this to initialize ledgers before task_init() */
 436 extern void             init_task_ledgers(void);
 437
 438 #define current_task_fast()     (current_thread()->task)
 439 #define current_task()          current_task_fast()
 440
 441 extern lck_attr_t      task_lck_attr;
 442 extern lck_grp_t       task_lck_grp;
 443
 444 #define QOS_OVERRIDE_MODE_OVERHANG_PEAK 0
 445 #define QOS_OVERRIDE_MODE_IGNORE_OVERRIDE 1
 446 #define QOS_OVERRIDE_MODE_FINE_GRAINED_OVERRIDE 2
 447 #define QOS_OVERRIDE_MODE_FINE_GRAINED_OVERRIDE_BUT_IGNORE_DISPATCH 3
 448 #define QOS_OVERRIDE_MODE_FINE_GRAINED_OVERRIDE_BUT_SINGLE_MUTEX_OVERRIDE 4
 449
 450 extern uint32_t qos_override_mode;
 451
 452 #else   /* MACH_KERNEL_PRIVATE */
 453
 454 __BEGIN_DECLS
 455
 456 extern task_t   current_task(void);
 457
 458 extern void             task_reference(task_t   task);
 459
 460 __END_DECLS
 461
 462 #endif  /* MACH_KERNEL_PRIVATE */
 463
 464 __BEGIN_DECLS
 465
 466 #ifdef  XNU_KERNEL_PRIVATE
 467
 468 /* Hold all threads in a task */
 469 extern kern_return_t    task_hold(
 470                                                         task_t          task);
 471
 472 /* Wait for task to stop running, either just to get off CPU or to cease being runnable */
 473 extern kern_return_t    task_wait(
 474                                                         task_t          task,
 475                                                         boolean_t       until_not_runnable);
 476
 477 /* Release hold on all threads in a task */
 478 extern kern_return_t    task_release(
 479                                                         task_t          task);
 480
 481 /* Suspend/resume a task where the kernel owns the suspend count */
 482 extern kern_return_t    task_suspend_internal(          task_t          task);
 483 extern kern_return_t    task_resume_internal(           task_t          task);
 484
 485 /* Suspends a task by placing a hold on its threads */
 486 extern kern_return_t    task_pidsuspend(
 487                                                         task_t          task);
 488 extern kern_return_t    task_pidsuspend_locked(
 489                                                         task_t          task);
 490
 491 /* Resumes a previously paused task */
 492 extern kern_return_t    task_pidresume(
 493                                                         task_t          task);
 494
 495 extern kern_return_t    task_send_trace_memory(
 496                                                         task_t          task,
 497                                                         uint32_t        pid,
 498                                                         uint64_t        uniqueid);
 499
 500 extern void                     tasks_system_suspend(boolean_t suspend);
 501
 502 #if CONFIG_FREEZE
 503
 504 /* Freeze a task's resident pages */
 505 extern kern_return_t    task_freeze(
 506                                                         task_t          task,
 507                                                         uint32_t        *purgeable_count,
 508                                                         uint32_t        *wired_count,
 509                                                         uint32_t        *clean_count,
 510                                                         uint32_t        *dirty_count,
 511                                                         uint32_t        dirty_budget,
 512                                                         boolean_t       *shared,
 513                                                         boolean_t       walk_only);
 514
 515 /* Thaw a currently frozen task */
 516 extern kern_return_t    task_thaw(
 517                                                         task_t          task);
 518
 519 #endif /* CONFIG_FREEZE */
 520
 521 /* Halt all other threads in the current task */
 522 extern kern_return_t    task_start_halt(
 523                                                         task_t          task);
 524
 525 /* Wait for other threads to halt and free halting task resources */
 526 extern void             task_complete_halt(
 527                                                         task_t          task);
 528
 529 extern kern_return_t    task_terminate_internal(
 530                                                         task_t                  task);
 531
 532 extern kern_return_t    task_create_internal(
 533                                                         task_t          parent_task,
 534                                                         coalition_t     *parent_coalitions,
 535                                                         boolean_t       inherit_memory,
 536                                                         boolean_t       is_64bit,
 537                                                         task_t          *child_task);   /* OUT */
 538
 539 extern kern_return_t    task_importance(
 540                                                         task_t                  task,
 541                                                         integer_t               importance);
 542
 543 extern void             task_power_info_locked(
 544                                                         task_t                  task,
 545                                                         task_power_info_t       info,
 546                                                gpu_energy_data_t gpu_energy);
 547
 548 extern uint64_t         task_gpu_utilisation(
 549                                                         task_t   task);
 550
 551 extern void             task_vtimer_set(
 552                                         task_t          task,
 553                                         integer_t       which);
 554
 555 extern void             task_vtimer_clear(
 556                                         task_t          task,
 557                                         integer_t       which);
 558
 559 extern void             task_vtimer_update(
 560                                         task_t          task,
 561                                         integer_t       which,
 562                                         uint32_t        *microsecs);
 563
 564 #define TASK_VTIMER_USER                0x01
 565 #define TASK_VTIMER_PROF                0x02
 566 #define TASK_VTIMER_RLIM                0x04
 567
 568 extern void             task_set_64bit(
 569                                         task_t          task,
 570                                         boolean_t       is64bit);
 571
 572 extern void             task_backing_store_privileged(
 573                                         task_t          task);
 574
 575 extern void             task_set_dyld_info(
 576                                         task_t          task,
 577                                         mach_vm_address_t addr,
 578                                         mach_vm_size_t size);
 579
 580 /* Get number of activations in a task */
 581 extern int              get_task_numacts(
 582                                         task_t          task);
 583
 584 extern int get_task_numactivethreads(task_t task);
 585 extern kern_return_t task_collect_crash_info(task_t task);
 586
 587 /* JMM - should just be temporary (implementation in bsd_kern still) */
 588 extern void     set_bsdtask_info(task_t,void *);
 589 extern vm_map_t get_task_map_reference(task_t);
 590 extern vm_map_t swap_task_map(task_t, thread_t, vm_map_t, boolean_t);
 591 extern pmap_t   get_task_pmap(task_t);
 592 extern uint64_t get_task_resident_size(task_t);
 593 extern uint64_t get_task_compressed(task_t);
 594 extern uint64_t get_task_resident_max(task_t);
 595 extern uint64_t get_task_phys_footprint(task_t);
 596 extern uint64_t get_task_phys_footprint_max(task_t);
 597 extern uint64_t get_task_purgeable_size(task_t);
 598 extern uint64_t get_task_cpu_time(task_t);
 599 extern uint64_t get_task_dispatchqueue_offset(task_t);
 600
 601 extern kern_return_t task_convert_phys_footprint_limit(int, int *);
 602 extern kern_return_t task_set_phys_footprint_limit_internal(task_t, int, int *, boolean_t);
 603 extern kern_return_t task_get_phys_footprint_limit(task_t task, int *limit_mb);
 604
 605 extern boolean_t        is_kerneltask(task_t task);
 606
 607 extern kern_return_t check_actforsig(task_t task, thread_t thread, int setast);
 608
 609 extern kern_return_t machine_task_get_state(
 610                                         task_t task,
 611                                         int flavor,
 612                                         thread_state_t state,
 613                                         mach_msg_type_number_t *state_count);
 614
 615 extern kern_return_t machine_task_set_state(
 616                                         task_t task,
 617                                         int flavor,
 618                                         thread_state_t state,
 619                                         mach_msg_type_number_t state_count);
 620
 621 extern void machine_task_terminate(task_t task);
 622
 623 struct _task_ledger_indices {
 624         int cpu_time;
 625         int tkm_private;
 626         int tkm_shared;
 627         int phys_mem;
 628         int wired_mem;
 629         int internal;
 630         int iokit_mapped;
 631         int alternate_accounting;
 632         int alternate_accounting_compressed;
 633         int phys_footprint;
 634         int internal_compressed;
 635         int purgeable_volatile;
 636         int purgeable_nonvolatile;
 637         int purgeable_volatile_compressed;
 638         int purgeable_nonvolatile_compressed;
 639         int platform_idle_wakeups;
 640         int interrupt_wakeups;
 641 #if CONFIG_SCHED_SFI
 642         int sfi_wait_times[MAX_SFI_CLASS_ID];
 643 #endif /* CONFIG_SCHED_SFI */
 644 #ifdef CONFIG_BANK
 645         int cpu_time_billed_to_me;
 646         int cpu_time_billed_to_others;
 647 #endif
 648 };
 649 extern struct _task_ledger_indices task_ledgers;
 650
 651 /* Begin task_policy */
 652
 653 /* value */
 654 #define TASK_POLICY_DISABLE             0x0
 655 #define TASK_POLICY_ENABLE              0x1
 656
 657 /* category */
 658 #define TASK_POLICY_INTERNAL            0x0
 659 #define TASK_POLICY_EXTERNAL            0x1
 660 #define TASK_POLICY_ATTRIBUTE           0x2
 661
 662 /* for tracing */
 663 #define TASK_POLICY_TASK                0x4
 664 #define TASK_POLICY_THREAD              0x8
 665
 666 /* flavors (also DBG_IMPORTANCE subclasses  0x20 - 0x3F) */
 667
 668 /* internal or external, thread or task */
 669 #define TASK_POLICY_DARWIN_BG           0x21
 670 #define TASK_POLICY_IOPOL               0x22
 671 #define TASK_POLICY_IO                  0x23
 672 #define TASK_POLICY_PASSIVE_IO          0x24
 673
 674 /* internal, task only */
 675 #define TASK_POLICY_DARWIN_BG_IOPOL     0x27
 676
 677 /* task-only attributes */
 678 #define TASK_POLICY_TAL                 0x28
 679 #define TASK_POLICY_BOOST               0x29
 680 #define TASK_POLICY_ROLE                0x2A
 681 #define TASK_POLICY_SUPPRESSED_CPU      0x2B
 682 #define TASK_POLICY_TERMINATED          0x2C
 683 #define TASK_POLICY_NEW_SOCKETS_BG      0x2D
 684 #define TASK_POLICY_LOWPRI_CPU          0x2E
 685 #define TASK_POLICY_LATENCY_QOS         0x2F
 686 #define TASK_POLICY_THROUGH_QOS         0x30
 687 #define TASK_POLICY_WATCHERS_BG         0x31
 688
 689 #define TASK_POLICY_SFI_MANAGED         0x34
 690 #define TASK_POLICY_ALL_SOCKETS_BG      0x37
 691
 692 #define TASK_POLICY_BASE_LATENCY_AND_THROUGHPUT_QOS  0x39 /* latency as value1, throughput as value2 */
 693 #define TASK_POLICY_OVERRIDE_LATENCY_AND_THROUGHPUT_QOS  0x3A /* latency as value1, throughput as value2 */
 694
 695 /* thread-only attributes */
 696 #define TASK_POLICY_PIDBIND_BG          0x32
 697 #define TASK_POLICY_WORKQ_BG            0x33
 698 #define TASK_POLICY_QOS                 0x35
 699 #define TASK_POLICY_QOS_OVERRIDE        0x36
 700 #define TASK_POLICY_QOS_AND_RELPRIO     0x38 /* QoS as value1, relative priority as value2 */
 701
 702 #define TASK_POLICY_MAX                 0x3F
 703
 704 /* The main entrance to task policy is this function */
 705 extern void proc_set_task_policy(task_t task, thread_t thread, int category, int flavor, int value);
 706 extern int  proc_get_task_policy(task_t task, thread_t thread, int category, int flavor);
 707
 708 /* For attributes that have two scalars as input/output */
 709 extern void proc_set_task_policy2(task_t task, thread_t thread, int category, int flavor, int value1, int value2);
 710 extern void proc_get_task_policy2(task_t task, thread_t thread, int category, int flavor, int *value1, int *value2);
 711
 712 /* For use by kernel threads and others who don't hold a reference on the target thread */
 713 extern void proc_set_task_policy_thread(task_t task, uint64_t tid, int category, int flavor, int value);
 714
 715 extern void proc_set_task_spawnpolicy(task_t task, int apptype, int qos_clamp, int role,
 716                                       ipc_port_t * portwatch_ports, int portwatch_count);
 717
 718 extern void task_set_main_thread_qos(task_t task, thread_t main_thread);
 719
 720 extern int proc_darwin_role_to_task_role(int darwin_role, int* task_role);
 721 extern int proc_task_role_to_darwin_role(int task_role);
 722
 723
 724 /* IO Throttle tiers */
 725 #define THROTTLE_LEVEL_NONE     -1
 726 #define THROTTLE_LEVEL_TIER0     0      /* IOPOL_NORMAL, IOPOL_DEFAULT, IOPOL_PASSIVE */
 727
 728 #define THROTTLE_LEVEL_THROTTLED 1
 729 #define THROTTLE_LEVEL_TIER1     1      /* IOPOL_STANDARD */
 730 #define THROTTLE_LEVEL_TIER2     2      /* IOPOL_UTILITY */
 731 #define THROTTLE_LEVEL_TIER3     3      /* IOPOL_THROTTLE */
 732
 733 #define THROTTLE_LEVEL_START     0
 734 #define THROTTLE_LEVEL_END       3
 735
 736 #define THROTTLE_LEVEL_COMPRESSOR_TIER0         THROTTLE_LEVEL_TIER0
 737 #define THROTTLE_LEVEL_COMPRESSOR_TIER1         THROTTLE_LEVEL_TIER1
 738 #define THROTTLE_LEVEL_COMPRESSOR_TIER2         THROTTLE_LEVEL_TIER2
 739
 740 #define THROTTLE_LEVEL_PAGEOUT_THROTTLED        THROTTLE_LEVEL_TIER2
 741 #define THROTTLE_LEVEL_PAGEOUT_UNTHROTTLED      THROTTLE_LEVEL_TIER1
 742
 743 #if CONFIG_IOSCHED
 744 #define IOSCHED_METADATA_TIER                   THROTTLE_LEVEL_TIER1
 745 #endif /* CONFIG_IOSCHED */
 746
 747 extern int proc_apply_workq_bgthreadpolicy(thread_t thread);
 748 extern int proc_restore_workq_bgthreadpolicy(thread_t thread);
 749
 750 extern int proc_get_darwinbgstate(task_t task, uint32_t *flagsp);
 751 extern boolean_t proc_task_is_tal(task_t task);
 752 extern int task_get_apptype(task_t);
 753 extern integer_t task_grab_latency_qos(task_t task);
 754 extern void task_policy_create(task_t task, int parent_boosted);
 755 extern void thread_policy_create(thread_t thread);
 756
 757 /*
 758  * for IPC importance hooks into task policy
 759  */
 760 typedef struct task_pend_token {
 761         uint32_t        tpt_update_sockets      :1,
 762                         tpt_update_timers       :1,
 763                         tpt_update_watchers     :1,
 764                         tpt_update_live_donor   :1,
 765                         tpt_update_coal_sfi     :1;
 766 } *task_pend_token_t;
 767
 768 extern void task_policy_update_complete_unlocked(task_t task, thread_t thread, task_pend_token_t pend_token);
 769 extern void task_update_boost_locked(task_t task, boolean_t boost_active, task_pend_token_t pend_token);
 770 extern void task_set_boost_locked(task_t task, boolean_t boost_active);
 771
 772 /*
 773  * Get effective policy
 774  * Only for use by relevant subsystem, should never be passed into a setter!
 775  */
 776
 777 extern int proc_get_effective_task_policy(task_t task, int flavor);
 778 extern int proc_get_effective_thread_policy(thread_t thread, int flavor);
 779
 780 /* temporary compatibility */
 781 int proc_setthread_saved_importance(thread_t thread, int importance);
 782
 783 int proc_get_task_ruse_cpu(task_t task, uint32_t *policyp, uint8_t *percentagep, uint64_t *intervalp, uint64_t *deadlinep);
 784 int proc_set_task_ruse_cpu(task_t task, uint32_t policy, uint8_t percentage, uint64_t interval, uint64_t deadline, int cpumon_entitled);
 785 int proc_clear_task_ruse_cpu(task_t task, int cpumon_entitled);
 786 thread_t task_findtid(task_t, uint64_t);
 787 void set_thread_iotier_override(thread_t, int policy);
 788
 789 boolean_t proc_thread_qos_add_override(task_t task, thread_t thread, uint64_t tid, int override_qos, boolean_t first_override_for_resource, user_addr_t resource, int resource_type);
 790 boolean_t proc_thread_qos_remove_override(task_t task, thread_t thread, uint64_t tid, user_addr_t resource, int resource_type);
 791 boolean_t proc_thread_qos_reset_override(task_t task, thread_t thread, uint64_t tid, user_addr_t resource, int resource_type);
 792 void proc_thread_qos_deallocate(thread_t thread);
 793
 794 #define TASK_RUSECPU_FLAGS_PROC_LIMIT                   0x01
 795 #define TASK_RUSECPU_FLAGS_PERTHR_LIMIT                 0x02
 796 #define TASK_RUSECPU_FLAGS_DEADLINE                     0x04
 797 #define TASK_RUSECPU_FLAGS_FATAL_CPUMON                 0x08    /* CPU usage monitor violations are fatal */
 798 #define TASK_RUSECPU_FLAGS_FATAL_WAKEUPSMON             0x10    /* wakeups monitor violations are fatal */
 799 #define TASK_RUSECPU_FLAGS_PHYS_FOOTPRINT_EXCEPTION     0x20    /* exceeding physical footprint generates EXC_RESOURCE */
 800
 801 /* BSD call back functions */
 802 extern int proc_apply_resource_actions(void * p, int type, int action);
 803 extern int proc_restore_resource_actions(void * p, int type, int action);
 804 extern int task_restore_resource_actions(task_t task, int type);
 805
 806 extern int task_clear_cpuusage(task_t task, int cpumon_entitled);
 807
 808 extern kern_return_t task_wakeups_monitor_ctl(task_t task, uint32_t *rate_hz, int32_t *flags);
 809 extern kern_return_t task_cpu_usage_monitor_ctl(task_t task, uint32_t *flags);
 810
 811
 812 extern void task_importance_mark_donor(task_t task, boolean_t donating);
 813 extern void task_importance_mark_live_donor(task_t task, boolean_t donating);
 814 extern void task_importance_mark_receiver(task_t task, boolean_t receiving);
 815 extern void task_importance_mark_denap_receiver(task_t task, boolean_t denap);
 816 extern void task_importance_reset(task_t task);
 817 extern void task_atm_reset(task_t task);
 818 extern void task_bank_reset(task_t task);
 819 extern void task_bank_init(task_t task);
 820
 821 #if IMPORTANCE_INHERITANCE
 822
 823 extern boolean_t task_is_importance_donor(task_t task);
 824 extern boolean_t task_is_marked_importance_donor(task_t task);
 825 extern boolean_t task_is_marked_live_importance_donor(task_t task);
 826
 827 extern boolean_t task_is_importance_receiver(task_t task);
 828 extern boolean_t task_is_marked_importance_receiver(task_t task);
 829
 830 extern boolean_t task_is_importance_denap_receiver(task_t task);
 831 extern boolean_t task_is_marked_importance_denap_receiver(task_t task);
 832
 833 extern boolean_t task_is_importance_receiver_type(task_t task);
 834
 835 extern int task_importance_hold_watchport_assertion(task_t target_task, uint32_t count);
 836 extern int task_importance_hold_internal_assertion(task_t target_task, uint32_t count);
 837 extern int task_importance_drop_internal_assertion(task_t target_task, uint32_t count);
 838
 839 extern int task_importance_hold_file_lock_assertion(task_t target_task, uint32_t count);
 840 extern int task_importance_drop_file_lock_assertion(task_t target_task, uint32_t count);
 841
 842 extern int task_importance_hold_legacy_external_assertion(task_t target_task, uint32_t count);
 843 extern int task_importance_drop_legacy_external_assertion(task_t target_task, uint32_t count);
 844
 845 #endif /* IMPORTANCE_INHERITANCE */
 846
 847 extern int task_low_mem_privileged_listener(task_t task, boolean_t new_value, boolean_t *old_value);
 848 extern boolean_t task_has_been_notified(task_t task, int pressurelevel);
 849 extern boolean_t task_used_for_purging(task_t task, int pressurelevel);
 850 extern void task_mark_has_been_notified(task_t task, int pressurelevel);
 851 extern void task_mark_used_for_purging(task_t task, int pressurelevel);
 852 extern void task_clear_has_been_notified(task_t task, int pressurelevel);
 853 extern void task_clear_used_for_purging(task_t task);
 854 extern int task_importance_estimate(task_t task);
 855
 856 extern int task_pid(task_t task);
 857
 858 /* End task_policy */
 859
 860 extern kern_return_t task_purge_volatile_memory(task_t task);
 861
 862 extern void      task_set_gpu_denied(task_t task, boolean_t denied);
 863 extern boolean_t task_is_gpu_denied(task_t task);
 864
 865 #define TASK_WRITE_IMMEDIATE            0x1
 866 #define TASK_WRITE_DEFERRED             0x2
 867 #define TASK_WRITE_INVALIDATED          0x4
 868 #define TASK_WRITE_METADATA             0x8
 869 extern void     task_update_logical_writes(task_t task, uint32_t io_size, int flags);
 870
 871 extern queue_head_t * task_io_user_clients(task_t task);
 872
 873 #endif  /* XNU_KERNEL_PRIVATE */
 874
 875 #ifdef  KERNEL_PRIVATE
 876
 877 extern void     *get_bsdtask_info(task_t);
 878 extern void     *get_bsdthreadtask_info(thread_t);
 879 extern void task_bsdtask_kill(task_t);
 880 extern vm_map_t get_task_map(task_t);
 881 extern ledger_t get_task_ledger(task_t);
 882
 883 extern boolean_t get_task_pidsuspended(task_t);
 884 extern boolean_t get_task_frozen(task_t);
 885
 886 /* Convert from a task to a port */
 887 extern ipc_port_t convert_task_to_port(task_t);
 888 extern ipc_port_t convert_task_name_to_port(task_name_t);
 889 extern ipc_port_t convert_task_suspension_token_to_port(task_suspension_token_t task);
 890
 891 /* Convert from a port (in this case, an SO right to a task's resume port) to a task. */
 892 extern task_suspension_token_t convert_port_to_task_suspension_token(ipc_port_t port);
 893
 894 extern boolean_t task_suspension_notify(mach_msg_header_t *);
 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_suspension_token_deallocate(
 907                                         task_suspension_token_t token);
 908 __END_DECLS
 909
 910 #endif  /* _KERN_TASK_H_ */