osfmk/kern/task.h

   1 /*
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  13  * terms of an Apple operating system software license agreement.
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  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
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  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
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  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 #ifndef _KERN_TASK_H_
  85 #define _KERN_TASK_H_
  86
  87 #include <kern/kern_types.h>
  88 #include <mach/mach_types.h>
  89 #include <sys/cdefs.h>
  90
  91 #ifdef  MACH_KERNEL_PRIVATE
  92
  93 #include <mach/boolean.h>
  94 #include <mach/port.h>
  95 #include <mach/time_value.h>
  96 #include <mach/message.h>
  97 #include <mach/mach_param.h>
  98 #include <mach/task_info.h>
  99 #include <mach/exception_types.h>
 100 #include <machine/task.h>
 101
 102 #include <kern/cpu_data.h>
 103 #include <kern/queue.h>
 104 #include <kern/exception.h>
 105 #include <kern/lock.h>
 106 #include <kern/thread.h>
 107
 108 #include <mach_host.h>
 109 #include <mach_prof.h>
 110
 111 struct task {
 112         /* Synchronization/destruction information */
 113         decl_mutex_data(,lock)          /* Task's lock */
 114         int             ref_count;      /* Number of references to me */
 115         boolean_t       active;         /* Task has not been terminated */
 116
 117         /* Miscellaneous */
 118         vm_map_t        map;            /* Address space description */
 119         queue_chain_t   pset_tasks;     /* list of tasks assigned to pset */
 120         void            *user_data;     /* Arbitrary data settable via IPC */
 121         int             suspend_count;  /* Internal scheduling only */
 122
 123         /* Threads in this task */
 124         queue_head_t    threads;
 125         int                             thread_count;
 126         int                             active_thread_count;
 127
 128         processor_set_t processor_set;  /* processor set for new threads */
 129 #if     MACH_HOST
 130         boolean_t       may_assign;     /* can assigned pset be changed? */
 131         boolean_t       assign_active;  /* waiting for may_assign */
 132 #endif  /* MACH_HOST */
 133
 134         /* User-visible scheduling information */
 135         integer_t               user_stop_count;        /* outstanding stops */
 136
 137         task_role_t             role;
 138
 139         integer_t               priority;                       /* base priority for threads */
 140         integer_t               max_priority;           /* maximum priority for threads */
 141
 142         /* Task security and audit tokens */
 143         security_token_t sec_token;
 144         audit_token_t   audit_token;
 145
 146         /* Statistics */
 147         uint64_t                total_user_time;        /* terminated threads only */
 148         uint64_t                total_system_time;
 149
 150 #if     MACH_PROF
 151         boolean_t       task_profiled;  /* is task being profiled ? */
 152         struct prof_data *profil_buffer;/* profile struct if so */
 153 #endif  /* MACH_PROF */
 154
 155         /* IPC structures */
 156         decl_mutex_data(,itk_lock_data)
 157         struct ipc_port *itk_self;      /* not a right, doesn't hold ref */
 158         struct ipc_port *itk_nself;     /* not a right, doesn't hold ref */
 159         struct ipc_port *itk_sself;     /* a send right */
 160         struct exception_action exc_actions[EXC_TYPES_COUNT];
 161                                         /* a send right each valid element  */
 162         struct ipc_port *itk_host;      /* a send right */
 163         struct ipc_port *itk_bootstrap; /* a send right */
 164         struct ipc_port *itk_registered[TASK_PORT_REGISTER_MAX];
 165                                         /* all send rights */
 166
 167         struct ipc_space *itk_space;
 168
 169         /* Synchronizer ownership information */
 170         queue_head_t    semaphore_list;         /* list of owned semaphores   */
 171         queue_head_t    lock_set_list;          /* list of owned lock sets    */
 172         int             semaphores_owned;       /* number of semaphores owned */
 173         int             lock_sets_owned;        /* number of lock sets owned  */
 174
 175         /* Ledgers */
 176         struct ipc_port *wired_ledger_port;
 177         struct ipc_port *paged_ledger_port;
 178         unsigned int    priv_flags;                     /* privilege resource flags */
 179 #define VM_BACKING_STORE_PRIV   0x1
 180
 181         MACHINE_TASK
 182
 183         integer_t faults;              /* faults counter */
 184         integer_t pageins;             /* pageins counter */
 185         integer_t cow_faults;          /* copy on write fault counter */
 186         integer_t messages_sent;       /* messages sent counter */
 187         integer_t messages_received;   /* messages received counter */
 188         integer_t syscalls_mach;       /* mach system call counter */
 189         integer_t syscalls_unix;       /* unix system call counter */
 190         integer_t csw;                 /* context switch counter */
 191 #ifdef  MACH_BSD
 192         void *bsd_info;
 193 #endif
 194         struct shared_region_mapping    *system_shared_region;
 195         struct tws_hash                 *dynamic_working_set;
 196         uint32_t taskFeatures[2];               /* Special feature for this task */
 197 #define tf64BitAddr     0x80000000              /* Task has 64-bit addressing */
 198 #define tf64BitData     0x40000000              /* Task has 64-bit data registers */
 199 #define task_has_64BitAddr(task)        \
 200          (((task)->taskFeatures[0] & tf64BitAddr) != 0)
 201 #define task_set_64BitAddr(task)        \
 202          ((task)->taskFeatures[0] |= tf64BitAddr)
 203 #define task_clear_64BitAddr(task)      \
 204          ((task)->taskFeatures[0] &= ~tf64BitAddr)
 205
 206 };
 207
 208 #define task_lock(task)         mutex_lock(&(task)->lock)
 209 #define task_lock_try(task)     mutex_try(&(task)->lock)
 210 #define task_unlock(task)       mutex_unlock(&(task)->lock)
 211
 212 #define itk_lock_init(task)     mutex_init(&(task)->itk_lock_data, 0)
 213 #define itk_lock(task)          mutex_lock(&(task)->itk_lock_data)
 214 #define itk_unlock(task)        mutex_unlock(&(task)->itk_lock_data)
 215
 216 #define task_reference_internal(task)           \
 217                         hw_atomic_add(&(task)->ref_count, 1)
 218
 219 #define task_deallocate_internal(task)          \
 220                         hw_atomic_sub(&(task)->ref_count, 1)
 221
 222 #define task_reference(task)                                    \
 223 MACRO_BEGIN                                                                             \
 224         if ((task) != TASK_NULL)                                        \
 225                 task_reference_internal(task);                  \
 226 MACRO_END
 227
 228 extern kern_return_t    kernel_task_create(
 229                                                         task_t                  task,
 230                                                         vm_offset_t             map_base,
 231                                                         vm_size_t               map_size,
 232                                                         task_t                  *child);
 233
 234 /* Initialize task module */
 235 extern void             task_init(void);
 236
 237 #define current_task_fast()     (current_thread()->task)
 238 #define current_task()          current_task_fast()
 239
 240 #else   /* MACH_KERNEL_PRIVATE */
 241
 242 __BEGIN_DECLS
 243
 244 extern task_t   current_task(void);
 245
 246 extern void             task_reference(task_t   task);
 247
 248 __END_DECLS
 249
 250 #endif  /* MACH_KERNEL_PRIVATE */
 251
 252 __BEGIN_DECLS
 253
 254 #ifdef  XNU_KERNEL_PRIVATE
 255
 256 /* Hold all threads in a task */
 257 extern kern_return_t    task_hold(
 258                                                         task_t          task);
 259
 260 /* Release hold on all threads in a task */
 261 extern kern_return_t    task_release(
 262                                                         task_t          task);
 263
 264 /* Halt all other threads in the current task */
 265 extern kern_return_t    task_halt(
 266                                                         task_t          task);
 267
 268 extern kern_return_t    task_terminate_internal(
 269                                                         task_t                  task);
 270
 271 extern kern_return_t    task_create_internal(
 272                                                         task_t          parent_task,
 273                                                         boolean_t       inherit_memory,
 274                                                         boolean_t       is_64bit,
 275                                                         task_t          *child_task);   /* OUT */
 276
 277 extern kern_return_t    task_importance(
 278                                                         task_t                  task,
 279                                                         integer_t               importance);
 280
 281 extern void             task_set_64bit(
 282                                         task_t          task,
 283                                         boolean_t       is64bit);
 284
 285 extern void             task_backing_store_privileged(
 286                                         task_t          task);
 287
 288 extern void             task_working_set_disable(
 289                                         task_t          task);
 290
 291
 292 /* Get number of activations in a task */
 293 extern int              get_task_numacts(
 294                                         task_t          task);
 295
 296
 297 /* JMM - should just be temporary (implementation in bsd_kern still) */
 298 extern void     set_bsdtask_info(task_t,void *);
 299 extern vm_map_t get_task_map_reference(task_t);
 300 extern vm_map_t swap_task_map(task_t, vm_map_t);
 301 extern pmap_t   get_task_pmap(task_t);
 302
 303 extern boolean_t        is_kerneltask(task_t task);
 304
 305 #endif  /* XNU_KERNEL_PRIVATE */
 306
 307 #ifdef  KERNEL_PRIVATE
 308
 309 extern void     *get_bsdtask_info(task_t);
 310 extern vm_map_t get_task_map(task_t);
 311
 312 #endif  /* KERNEL_PRIVATE */
 313
 314 extern task_t   kernel_task;
 315
 316 extern void             task_deallocate(
 317                                         task_t          task);
 318
 319 extern void             task_name_deallocate(
 320                                         task_name_t             task_name);
 321 __END_DECLS
 322
 323 #endif  /* _KERN_TASK_H_ */