osfmk/kern/task.h

   1 /*
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  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
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  19  *
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  30 /*
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  32  */
  33 /*
  34  * Mach Operating System
  35  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
  36  * All Rights Reserved.
  37  *
  38  * Permission to use, copy, modify and distribute this software and its
  39  * documentation is hereby granted, provided that both the copyright
  40  * notice and this permission notice appear in all copies of the
  41  * software, derivative works or modified versions, and any portions
  42  * thereof, and that both notices appear in supporting documentation.
  43  *
  44  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  45  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  46  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  47  *
  48  * Carnegie Mellon requests users of this software to return to
  49  *
  50  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
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  55  * any improvements or extensions that they make and grant Carnegie Mellon
  56  * the rights to redistribute these changes.
  57  */
  58 /*
  59  */
  60 /*
  61  *      File:   task.h
  62  *      Author: Avadis Tevanian, Jr.
  63  *
  64  *      This file contains the structure definitions for tasks.
  65  *
  66  */
  67 /*
  68  * Copyright (c) 1993 The University of Utah and
  69  * the Computer Systems Laboratory (CSL).  All rights reserved.
  70  *
  71  * Permission to use, copy, modify and distribute this software and its
  72  * documentation is hereby granted, provided that both the copyright
  73  * notice and this permission notice appear in all copies of the
  74  * software, derivative works or modified versions, and any portions
  75  * thereof, and that both notices appear in supporting documentation.
  76  *
  77  * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  78  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
  79  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  80  *
  81  * CSL requests users of this software to return to csl-dist@cs.utah.edu any
  82  * improvements that they make and grant CSL redistribution rights.
  83  *
  84  */
  85
  86 #ifndef _KERN_TASK_H_
  87 #define _KERN_TASK_H_
  88
  89 #include <kern/kern_types.h>
  90 #include <mach/mach_types.h>
  91 #include <sys/cdefs.h>
  92
  93 #ifdef  MACH_KERNEL_PRIVATE
  94
  95 #include <mach/boolean.h>
  96 #include <mach/port.h>
  97 #include <mach/time_value.h>
  98 #include <mach/message.h>
  99 #include <mach/mach_param.h>
 100 #include <mach/task_info.h>
 101 #include <mach/exception_types.h>
 102 #include <machine/task.h>
 103
 104 #include <kern/cpu_data.h>
 105 #include <kern/queue.h>
 106 #include <kern/exception.h>
 107 #include <kern/lock.h>
 108 #include <kern/thread.h>
 109
 110 #include <mach_host.h>
 111 #include <mach_prof.h>
 112
 113 struct task {
 114         /* Synchronization/destruction information */
 115         decl_mutex_data(,lock)          /* Task's lock */
 116         int             ref_count;      /* Number of references to me */
 117         boolean_t       active;         /* Task has not been terminated */
 118
 119         /* Miscellaneous */
 120         vm_map_t        map;            /* Address space description */
 121         queue_chain_t   pset_tasks;     /* list of tasks assigned to pset */
 122         void            *user_data;     /* Arbitrary data settable via IPC */
 123         int             suspend_count;  /* Internal scheduling only */
 124
 125         /* Threads in this task */
 126         queue_head_t    threads;
 127         int                             thread_count;
 128         int                             active_thread_count;
 129
 130         processor_set_t processor_set;  /* processor set for new threads */
 131 #if     MACH_HOST
 132         boolean_t       may_assign;     /* can assigned pset be changed? */
 133         boolean_t       assign_active;  /* waiting for may_assign */
 134 #endif  /* MACH_HOST */
 135
 136         /* User-visible scheduling information */
 137         integer_t               user_stop_count;        /* outstanding stops */
 138
 139         task_role_t             role;
 140
 141         integer_t               priority;                       /* base priority for threads */
 142         integer_t               max_priority;           /* maximum priority for threads */
 143
 144         /* Task security and audit tokens */
 145         security_token_t sec_token;
 146         audit_token_t   audit_token;
 147
 148         /* Statistics */
 149         uint64_t                total_user_time;        /* terminated threads only */
 150         uint64_t                total_system_time;
 151
 152 #if     MACH_PROF
 153         boolean_t       task_profiled;  /* is task being profiled ? */
 154         struct prof_data *profil_buffer;/* profile struct if so */
 155 #endif  /* MACH_PROF */
 156
 157         /* IPC structures */
 158         decl_mutex_data(,itk_lock_data)
 159         struct ipc_port *itk_self;      /* not a right, doesn't hold ref */
 160         struct ipc_port *itk_nself;     /* not a right, doesn't hold ref */
 161         struct ipc_port *itk_sself;     /* a send right */
 162         struct exception_action exc_actions[EXC_TYPES_COUNT];
 163                                         /* a send right each valid element  */
 164         struct ipc_port *itk_host;      /* a send right */
 165         struct ipc_port *itk_bootstrap; /* a send right */
 166         struct ipc_port *itk_registered[TASK_PORT_REGISTER_MAX];
 167                                         /* all send rights */
 168
 169         struct ipc_space *itk_space;
 170
 171         /* Synchronizer ownership information */
 172         queue_head_t    semaphore_list;         /* list of owned semaphores   */
 173         queue_head_t    lock_set_list;          /* list of owned lock sets    */
 174         int             semaphores_owned;       /* number of semaphores owned */
 175         int             lock_sets_owned;        /* number of lock sets owned  */
 176
 177         /* Ledgers */
 178         struct ipc_port *wired_ledger_port;
 179         struct ipc_port *paged_ledger_port;
 180         unsigned int    priv_flags;                     /* privilege resource flags */
 181 #define VM_BACKING_STORE_PRIV   0x1
 182
 183         MACHINE_TASK
 184
 185         integer_t faults;              /* faults counter */
 186         integer_t pageins;             /* pageins counter */
 187         integer_t cow_faults;          /* copy on write fault counter */
 188         integer_t messages_sent;       /* messages sent counter */
 189         integer_t messages_received;   /* messages received counter */
 190         integer_t syscalls_mach;       /* mach system call counter */
 191         integer_t syscalls_unix;       /* unix system call counter */
 192         integer_t csw;                 /* context switch counter */
 193 #ifdef  MACH_BSD
 194         void *bsd_info;
 195 #endif
 196         struct shared_region_mapping    *system_shared_region;
 197         struct tws_hash                 *dynamic_working_set;
 198         uint32_t taskFeatures[2];               /* Special feature for this task */
 199 #define tf64BitAddr     0x80000000              /* Task has 64-bit addressing */
 200 #define tf64BitData     0x40000000              /* Task has 64-bit data registers */
 201 #define task_has_64BitAddr(task)        \
 202          (((task)->taskFeatures[0] & tf64BitAddr) != 0)
 203 #define task_set_64BitAddr(task)        \
 204          ((task)->taskFeatures[0] |= tf64BitAddr)
 205 #define task_clear_64BitAddr(task)      \
 206          ((task)->taskFeatures[0] &= ~tf64BitAddr)
 207
 208 };
 209
 210 #define task_lock(task)         mutex_lock(&(task)->lock)
 211 #define task_lock_try(task)     mutex_try(&(task)->lock)
 212 #define task_unlock(task)       mutex_unlock(&(task)->lock)
 213
 214 #define itk_lock_init(task)     mutex_init(&(task)->itk_lock_data, 0)
 215 #define itk_lock(task)          mutex_lock(&(task)->itk_lock_data)
 216 #define itk_unlock(task)        mutex_unlock(&(task)->itk_lock_data)
 217
 218 #define task_reference_internal(task)           \
 219                         hw_atomic_add(&(task)->ref_count, 1)
 220
 221 #define task_deallocate_internal(task)          \
 222                         hw_atomic_sub(&(task)->ref_count, 1)
 223
 224 #define task_reference(task)                                    \
 225 MACRO_BEGIN                                                                             \
 226         if ((task) != TASK_NULL)                                        \
 227                 task_reference_internal(task);                  \
 228 MACRO_END
 229
 230 extern kern_return_t    kernel_task_create(
 231                                                         task_t                  task,
 232                                                         vm_offset_t             map_base,
 233                                                         vm_size_t               map_size,
 234                                                         task_t                  *child);
 235
 236 /* Initialize task module */
 237 extern void             task_init(void);
 238
 239 #define current_task_fast()     (current_thread()->task)
 240 #define current_task()          current_task_fast()
 241
 242 #else   /* MACH_KERNEL_PRIVATE */
 243
 244 __BEGIN_DECLS
 245
 246 extern task_t   current_task(void);
 247
 248 extern void             task_reference(task_t   task);
 249
 250 __END_DECLS
 251
 252 #endif  /* MACH_KERNEL_PRIVATE */
 253
 254 __BEGIN_DECLS
 255
 256 #ifdef  XNU_KERNEL_PRIVATE
 257
 258 /* Hold all threads in a task */
 259 extern kern_return_t    task_hold(
 260                                                         task_t          task);
 261
 262 /* Release hold on all threads in a task */
 263 extern kern_return_t    task_release(
 264                                                         task_t          task);
 265
 266 /* Halt all other threads in the current task */
 267 extern kern_return_t    task_halt(
 268                                                         task_t          task);
 269
 270 extern kern_return_t    task_terminate_internal(
 271                                                         task_t                  task);
 272
 273 extern kern_return_t    task_create_internal(
 274                                                         task_t          parent_task,
 275                                                         boolean_t       inherit_memory,
 276                                                         boolean_t       is_64bit,
 277                                                         task_t          *child_task);   /* OUT */
 278
 279 extern kern_return_t    task_importance(
 280                                                         task_t                  task,
 281                                                         integer_t               importance);
 282
 283 extern void             task_set_64bit(
 284                                         task_t          task,
 285                                         boolean_t       is64bit);
 286
 287 extern void             task_backing_store_privileged(
 288                                         task_t          task);
 289
 290 extern void             task_working_set_disable(
 291                                         task_t          task);
 292
 293
 294 /* Get number of activations in a task */
 295 extern int              get_task_numacts(
 296                                         task_t          task);
 297
 298
 299 /* JMM - should just be temporary (implementation in bsd_kern still) */
 300 extern void     set_bsdtask_info(task_t,void *);
 301 extern vm_map_t get_task_map_reference(task_t);
 302 extern vm_map_t swap_task_map(task_t, vm_map_t);
 303 extern pmap_t   get_task_pmap(task_t);
 304
 305 extern boolean_t        is_kerneltask(task_t task);
 306
 307 #endif  /* XNU_KERNEL_PRIVATE */
 308
 309 #ifdef  KERNEL_PRIVATE
 310
 311 extern void     *get_bsdtask_info(task_t);
 312 extern vm_map_t get_task_map(task_t);
 313
 314 #endif  /* KERNEL_PRIVATE */
 315
 316 extern task_t   kernel_task;
 317
 318 extern void             task_deallocate(
 319                                         task_t          task);
 320
 321 extern void             task_name_deallocate(
 322                                         task_name_t             task_name);
 323 __END_DECLS
 324
 325 #endif  /* _KERN_TASK_H_ */