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1 /*
2 * Copyright (c) 2000-2007 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
7 * as defined in and that are subject to the Apple Public Source License
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) 1991,1990,1989,1988,1987 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: thread.h
60 * Author: Avadis Tevanian, Jr.
61 *
62 * This file contains the structure definitions for threads.
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_THREAD_H_
85 #define _KERN_THREAD_H_
86
87 #include <mach/kern_return.h>
88 #include <mach/mach_types.h>
89 #include <mach/message.h>
90 #include <mach/boolean.h>
91 #include <mach/vm_param.h>
92 #include <mach/thread_info.h>
93 #include <mach/thread_status.h>
94 #include <mach/exception_types.h>
95
96 #include <kern/kern_types.h>
97
98 #include <sys/cdefs.h>
99
100 #ifdef MACH_KERNEL_PRIVATE
101
102 #include <cputypes.h>
103
104 #include <mach_assert.h>
105 #include <mach_ldebug.h>
106
107 #include <ipc/ipc_types.h>
108
109 #include <mach/port.h>
110 #include <kern/cpu_number.h>
111 #include <kern/queue.h>
112 #include <kern/timer.h>
113 #include <kern/lock.h>
114 #include <kern/locks.h>
115 #include <kern/sched.h>
116 #include <kern/sched_prim.h>
117 #include <kern/thread_call.h>
118 #include <kern/timer_call.h>
119 #include <kern/task.h>
120 #include <kern/exception.h>
121 #include <kern/affinity.h>
122
123 #include <ipc/ipc_kmsg.h>
124
125 #include <machine/cpu_data.h>
126 #include <machine/thread.h>
127
128 struct thread {
129 /*
130 * NOTE: The runq field in the thread structure has an unusual
131 * locking protocol. If its value is PROCESSOR_NULL, then it is
132 * locked by the thread_lock, but if its value is something else
133 * then it is locked by the associated run queue lock.
134 *
135 * When the thread is on a wait queue, these first three fields
136 * are treated as an unofficial union with a wait_queue_element.
137 * If you change these, you must change that definition as well
138 * (kern/wait_queue.h).
139 */
140 /* Items examined often, modified infrequently */
141 queue_chain_t links; /* run/wait queue links */
142 processor_t runq; /* run queue assignment */
143 wait_queue_t wait_queue; /* wait queue we are currently on */
144 event64_t wait_event; /* wait queue event */
145 integer_t options; /* options set by thread itself */
146 #define TH_OPT_INTMASK 0x03 /* interrupt / abort level */
147 #define TH_OPT_VMPRIV 0x04 /* may allocate reserved memory */
148 #define TH_OPT_DTRACE 0x08 /* executing under dtrace_probe */
149
150 /* Data updated during assert_wait/thread_wakeup */
151 decl_simple_lock_data(,sched_lock) /* scheduling lock (thread_lock()) */
152 decl_simple_lock_data(,wake_lock) /* for thread stop / wait (wake_lock()) */
153 boolean_t wake_active; /* wake event on stop */
154 int at_safe_point; /* thread_abort_safely allowed */
155 ast_t reason; /* why we blocked */
156 wait_result_t wait_result; /* outcome of wait -
157 * may be examined by this thread
158 * WITHOUT locking */
159 thread_continue_t continuation; /* continue here next dispatch */
160 void *parameter; /* continuation parameter */
161
162 /* Data updated/used in thread_invoke */
163 struct funnel_lock *funnel_lock; /* Non-reentrancy funnel */
164 int funnel_state;
165 #define TH_FN_OWNED 0x1 /* we own the funnel */
166 #define TH_FN_REFUNNEL 0x2 /* re-acquire funnel on dispatch */
167
168 vm_offset_t kernel_stack; /* current kernel stack */
169 vm_offset_t reserved_stack; /* reserved kernel stack */
170
171 /* Thread state: */
172 int state;
173 /*
174 * Thread states [bits or'ed]
175 */
176 #define TH_WAIT 0x01 /* queued for waiting */
177 #define TH_SUSP 0x02 /* stopped or requested to stop */
178 #define TH_RUN 0x04 /* running or on runq */
179 #define TH_UNINT 0x08 /* waiting uninteruptibly */
180 #define TH_TERMINATE 0x10 /* halted at termination */
181
182 #define TH_IDLE 0x80 /* idling processor */
183
184 /* Scheduling information */
185 integer_t sched_mode; /* scheduling mode bits */
186 #define TH_MODE_REALTIME 0x0001 /* time constraints supplied */
187 #define TH_MODE_TIMESHARE 0x0002 /* use timesharing algorithm */
188 #define TH_MODE_FAILSAFE 0x0004 /* fail-safe has tripped */
189 #define TH_MODE_PROMOTED 0x0008 /* sched pri has been promoted */
190 #define TH_MODE_ABORT 0x0010 /* abort interruptible waits */
191 #define TH_MODE_ABORTSAFELY 0x0020 /* ... but only those at safe point */
192 #define TH_MODE_ISABORTED (TH_MODE_ABORT | TH_MODE_ABORTSAFELY)
193 #define TH_MODE_DEPRESS 0x0040 /* normal depress yield */
194 #define TH_MODE_POLLDEPRESS 0x0080 /* polled depress yield */
195 #define TH_MODE_ISDEPRESSED (TH_MODE_DEPRESS | TH_MODE_POLLDEPRESS)
196
197 integer_t sched_pri; /* scheduled (current) priority */
198 integer_t priority; /* base priority */
199 integer_t max_priority; /* max base priority */
200 integer_t task_priority; /* copy of task base priority */
201
202 integer_t promotions; /* level of promotion */
203 integer_t pending_promoter_index;
204 void *pending_promoter[2];
205
206 integer_t importance; /* task-relative importance */
207
208 /* real-time parameters */
209 struct { /* see mach/thread_policy.h */
210 uint32_t period;
211 uint32_t computation;
212 uint32_t constraint;
213 boolean_t preemptible;
214
215 uint64_t deadline;
216 } realtime;
217
218 uint32_t current_quantum; /* duration of current quantum */
219
220 /* Data used during setrun/dispatch */
221 timer_data_t system_timer; /* system mode timer */
222 processor_t bound_processor; /* bound to a processor? */
223 processor_t last_processor; /* processor last dispatched on */
224 uint64_t last_switch; /* time of last context switch */
225
226 /* Fail-safe computation since last unblock or qualifying yield */
227 uint64_t computation_metered;
228 uint64_t computation_epoch;
229 integer_t safe_mode; /* saved mode during fail-safe */
230 natural_t safe_release; /* when to release fail-safe */
231
232 /* Call out from scheduler */
233 void (*sched_call)(
234 int type,
235 thread_t thread);
236
237 /* Statistics and timesharing calculations */
238 natural_t sched_stamp; /* last scheduler tick */
239 natural_t sched_usage; /* timesharing cpu usage [sched] */
240 natural_t pri_shift; /* usage -> priority from pset */
241 natural_t cpu_usage; /* instrumented cpu usage [%cpu] */
242 natural_t cpu_delta; /* accumulated cpu_usage delta */
243 uint32_t c_switch; /* total context switches */
244 uint32_t p_switch; /* total processor switches */
245 uint32_t ps_switch; /* total pset switches */
246
247 /* Timing data structures */
248 timer_data_t user_timer; /* user mode timer */
249 uint64_t user_timer_save; /* saved user timer value */
250 uint64_t system_timer_save; /* saved system timer value */
251 uint64_t vtimer_user_save; /* saved values for vtimers */
252 uint64_t vtimer_prof_save;
253 uint64_t vtimer_rlim_save;
254
255 /* Timed wait expiration */
256 timer_call_data_t wait_timer;
257 integer_t wait_timer_active;
258 boolean_t wait_timer_is_set;
259
260 /* Priority depression expiration */
261 timer_call_data_t depress_timer;
262 integer_t depress_timer_active;
263
264 /*
265 * Processor/cache affinity
266 * - affinity_threads links task threads with the same affinity set
267 */
268 affinity_set_t affinity_set;
269 queue_chain_t affinity_threads;
270
271 /* Various bits of stashed state */
272 union {
273 struct {
274 mach_msg_return_t state; /* receive state */
275 ipc_object_t object; /* object received on */
276 mach_vm_address_t msg_addr; /* receive buffer pointer */
277 mach_msg_size_t msize; /* max size for recvd msg */
278 mach_msg_option_t option; /* options for receive */
279 mach_msg_size_t slist_size; /* scatter list size */
280 struct ipc_kmsg *kmsg; /* received message */
281 mach_port_seqno_t seqno; /* seqno of recvd message */
282 mach_msg_continue_t continuation;
283 } receive;
284 struct {
285 struct semaphore *waitsemaphore; /* semaphore ref */
286 struct semaphore *signalsemaphore; /* semaphore ref */
287 int options; /* semaphore options */
288 kern_return_t result; /* primary result */
289 mach_msg_continue_t continuation;
290 } sema;
291 struct {
292 int option; /* switch option */
293 } swtch;
294 int misc; /* catch-all for other state */
295 } saved;
296
297 /* IPC data structures */
298 struct ipc_kmsg_queue ith_messages;
299 mach_port_t ith_rpc_reply; /* reply port for kernel RPCs */
300
301 /* Ast/Halt data structures */
302 vm_offset_t recover; /* page fault recover(copyin/out) */
303 uint32_t ref_count; /* number of references to me */
304
305 queue_chain_t threads; /* global list of all threads */
306
307 /* Activation */
308 queue_chain_t task_threads;
309
310 /*** Machine-dependent state ***/
311 struct machine_thread machine;
312
313 /* Task membership */
314 struct task *task;
315 vm_map_t map;
316
317 decl_mutex_data(,mutex)
318
319 /* Kernel holds on this thread */
320 int suspend_count;
321
322 /* User level suspensions */
323 int user_stop_count;
324
325 /* Pending thread ast(s) */
326 ast_t ast;
327
328 /* Miscellaneous bits guarded by mutex */
329 uint32_t
330 active:1, /* Thread is active and has not been terminated */
331 started:1, /* Thread has been started after creation */
332 static_param:1, /* Disallow policy parameter changes */
333 :0;
334
335 /* Return Handers */
336 struct ReturnHandler {
337 struct ReturnHandler *next;
338 void (*handler)(
339 struct ReturnHandler *rh,
340 struct thread *thread);
341 } *handlers, special_handler;
342
343 /* Ports associated with this thread */
344 struct ipc_port *ith_self; /* not a right, doesn't hold ref */
345 struct ipc_port *ith_sself; /* a send right */
346 struct exception_action exc_actions[EXC_TYPES_COUNT];
347
348 /* Owned ulocks (a lock set element) */
349 queue_head_t held_ulocks;
350
351 #ifdef MACH_BSD
352 void *uthread;
353 #endif
354
355 #if CONFIG_DTRACE
356 uint32_t t_dtrace_predcache;/* DTrace per thread predicate value hint */
357 int64_t t_dtrace_tracing; /* Thread time under dtrace_probe() */
358 int64_t t_dtrace_vtime;
359 #endif
360 uint32_t t_chud; /* CHUD flags, used for Shark */
361 };
362
363 #define ith_state saved.receive.state
364 #define ith_object saved.receive.object
365 #define ith_msg_addr saved.receive.msg_addr
366 #define ith_msize saved.receive.msize
367 #define ith_option saved.receive.option
368 #define ith_scatter_list_size saved.receive.slist_size
369 #define ith_continuation saved.receive.continuation
370 #define ith_kmsg saved.receive.kmsg
371 #define ith_seqno saved.receive.seqno
372
373 #define sth_waitsemaphore saved.sema.waitsemaphore
374 #define sth_signalsemaphore saved.sema.signalsemaphore
375 #define sth_options saved.sema.options
376 #define sth_result saved.sema.result
377 #define sth_continuation saved.sema.continuation
378
379 extern void thread_bootstrap(void) __attribute__((section("__TEXT, initcode")));
380
381 extern void thread_init(void) __attribute__((section("__TEXT, initcode")));
382
383 extern void thread_daemon_init(void);
384
385 #define thread_reference_internal(thread) \
386 (void)hw_atomic_add(&(thread)->ref_count, 1)
387
388 #define thread_deallocate_internal(thread) \
389 hw_atomic_sub(&(thread)->ref_count, 1)
390
391 #define thread_reference(thread) \
392 MACRO_BEGIN \
393 if ((thread) != THREAD_NULL) \
394 thread_reference_internal(thread); \
395 MACRO_END
396
397 extern void thread_deallocate(
398 thread_t thread);
399
400 extern void thread_terminate_self(void);
401
402 extern kern_return_t thread_terminate_internal(
403 thread_t thread);
404
405 extern void thread_start_internal(
406 thread_t thread) __attribute__ ((noinline));
407
408 extern void thread_terminate_enqueue(
409 thread_t thread);
410
411 extern void thread_stack_enqueue(
412 thread_t thread);
413
414 extern void thread_hold(
415 thread_t thread);
416
417 extern void thread_release(
418 thread_t thread);
419
420 #define thread_lock_init(th) simple_lock_init(&(th)->sched_lock, 0)
421 #define thread_lock(th) simple_lock(&(th)->sched_lock)
422 #define thread_unlock(th) simple_unlock(&(th)->sched_lock)
423
424 #define wake_lock_init(th) simple_lock_init(&(th)->wake_lock, 0)
425 #define wake_lock(th) simple_lock(&(th)->wake_lock)
426 #define wake_unlock(th) simple_unlock(&(th)->wake_lock)
427
428 #define thread_should_halt_fast(thread) (!(thread)->active)
429
430 extern void stack_alloc(
431 thread_t thread);
432
433 extern void stack_free(
434 thread_t thread);
435
436 extern void stack_free_stack(
437 vm_offset_t stack);
438
439 extern boolean_t stack_alloc_try(
440 thread_t thread);
441
442 extern void stack_collect(void);
443
444 extern void stack_init(void) __attribute__((section("__TEXT, initcode")));
445
446 extern kern_return_t thread_state_initialize(
447 thread_t thread);
448
449 extern kern_return_t thread_setstatus(
450 thread_t thread,
451 int flavor,
452 thread_state_t tstate,
453 mach_msg_type_number_t count);
454
455 extern kern_return_t thread_getstatus(
456 thread_t thread,
457 int flavor,
458 thread_state_t tstate,
459 mach_msg_type_number_t *count);
460
461 extern kern_return_t thread_info_internal(
462 thread_t thread,
463 thread_flavor_t flavor,
464 thread_info_t thread_info_out,
465 mach_msg_type_number_t *thread_info_count);
466
467 extern void thread_task_priority(
468 thread_t thread,
469 integer_t priority,
470 integer_t max_priority);
471
472 extern void thread_policy_reset(
473 thread_t thread);
474
475 extern kern_return_t kernel_thread_create(
476 thread_continue_t continuation,
477 void *parameter,
478 integer_t priority,
479 thread_t *new_thread);
480
481 extern kern_return_t kernel_thread_start_priority(
482 thread_continue_t continuation,
483 void *parameter,
484 integer_t priority,
485 thread_t *new_thread);
486
487 extern void machine_stack_attach(
488 thread_t thread,
489 vm_offset_t stack);
490
491 extern vm_offset_t machine_stack_detach(
492 thread_t thread);
493
494 extern void machine_stack_handoff(
495 thread_t old,
496 thread_t new);
497
498 extern thread_t machine_switch_context(
499 thread_t old_thread,
500 thread_continue_t continuation,
501 thread_t new_thread);
502
503 extern void machine_load_context(
504 thread_t thread);
505
506 extern kern_return_t machine_thread_state_initialize(
507 thread_t thread);
508
509 extern kern_return_t machine_thread_set_state(
510 thread_t thread,
511 thread_flavor_t flavor,
512 thread_state_t state,
513 mach_msg_type_number_t count);
514
515 extern kern_return_t machine_thread_get_state(
516 thread_t thread,
517 thread_flavor_t flavor,
518 thread_state_t state,
519 mach_msg_type_number_t *count);
520
521 extern kern_return_t machine_thread_dup(
522 thread_t self,
523 thread_t target);
524
525 extern void machine_thread_init(void);
526
527 extern kern_return_t machine_thread_create(
528 thread_t thread,
529 task_t task);
530 extern void machine_thread_switch_addrmode(
531 thread_t thread);
532
533 extern void machine_thread_destroy(
534 thread_t thread);
535
536 extern void machine_set_current_thread(
537 thread_t thread);
538
539 extern void machine_thread_terminate_self(void);
540
541 extern kern_return_t machine_thread_get_kern_state(
542 thread_t thread,
543 thread_flavor_t flavor,
544 thread_state_t tstate,
545 mach_msg_type_number_t *count);
546
547
548 /*
549 * XXX Funnel locks XXX
550 */
551
552 struct funnel_lock {
553 int fnl_type; /* funnel type */
554 lck_mtx_t *fnl_mutex; /* underlying mutex for the funnel */
555 void * fnl_mtxholder; /* thread (last)holdng mutex */
556 void * fnl_mtxrelease; /* thread (last)releasing mutex */
557 lck_mtx_t *fnl_oldmutex; /* Mutex before collapsing split funnel */
558 };
559
560 typedef struct ReturnHandler ReturnHandler;
561
562 #define thread_mtx_lock(thread) mutex_lock(&(thread)->mutex)
563 #define thread_mtx_try(thread) mutex_try(&(thread)->mutex)
564 #define thread_mtx_unlock(thread) mutex_unlock(&(thread)->mutex)
565
566 extern void act_execute_returnhandlers(void);
567
568 extern void install_special_handler(
569 thread_t thread);
570
571 extern void special_handler(
572 ReturnHandler *rh,
573 thread_t thread);
574
575 void act_machine_sv_free(thread_t, int);
576
577 #else /* MACH_KERNEL_PRIVATE */
578
579 __BEGIN_DECLS
580
581 extern thread_t current_thread(void);
582
583 extern void thread_reference(
584 thread_t thread);
585
586 extern void thread_deallocate(
587 thread_t thread);
588
589 __END_DECLS
590
591 #endif /* MACH_KERNEL_PRIVATE */
592
593 #ifdef KERNEL_PRIVATE
594
595 typedef struct funnel_lock funnel_t;
596
597 #ifdef MACH_KERNEL_PRIVATE
598
599 extern void funnel_lock(
600 funnel_t *lock);
601
602 extern void funnel_unlock(
603 funnel_t *lock);
604
605 vm_offset_t min_valid_stack_address(void);
606 vm_offset_t max_valid_stack_address(void);
607
608 #endif /* MACH_KERNEL_PRIVATE */
609
610 __BEGIN_DECLS
611
612 extern funnel_t *thread_funnel_get(void);
613
614 extern boolean_t thread_funnel_set(
615 funnel_t *lock,
616 boolean_t funneled);
617
618 extern thread_t kernel_thread(
619 task_t task,
620 void (*start)(void));
621
622 __END_DECLS
623
624 #endif /* KERNEL_PRIVATE */
625
626 __BEGIN_DECLS
627
628 #ifdef XNU_KERNEL_PRIVATE
629
630 extern void thread_yield_internal(
631 mach_msg_timeout_t interval);
632
633 /*
634 * XXX Funnel locks XXX
635 */
636
637 #define THR_FUNNEL_NULL (funnel_t *)0
638
639 extern funnel_t *funnel_alloc(
640 int type);
641
642 extern void funnel_free(
643 funnel_t *lock);
644
645 extern void thread_read_times(
646 thread_t thread,
647 time_value_t *user_time,
648 time_value_t *system_time);
649
650 extern void thread_setuserstack(
651 thread_t thread,
652 mach_vm_offset_t user_stack);
653
654 extern uint64_t thread_adjuserstack(
655 thread_t thread,
656 int adjust);
657
658 extern void thread_setentrypoint(
659 thread_t thread,
660 mach_vm_offset_t entry);
661
662 extern kern_return_t thread_setsinglestep(
663 thread_t thread,
664 int on);
665
666 extern kern_return_t thread_wire_internal(
667 host_priv_t host_priv,
668 thread_t thread,
669 boolean_t wired,
670 boolean_t *prev_state);
671
672 extern kern_return_t thread_dup(thread_t);
673
674 typedef void (*sched_call_t)(
675 int type,
676 thread_t thread);
677
678 #define SCHED_CALL_BLOCK 0x1
679 #define SCHED_CALL_UNBLOCK 0x2
680
681 extern void thread_sched_call(
682 thread_t thread,
683 sched_call_t call);
684
685 extern void thread_static_param(
686 thread_t thread,
687 boolean_t state);
688
689 extern task_t get_threadtask(thread_t);
690 #define thread_is_64bit(thd) \
691 task_has_64BitAddr(get_threadtask(thd))
692
693
694 extern void *get_bsdthread_info(thread_t);
695 extern void set_bsdthread_info(thread_t, void *);
696 extern void *uthread_alloc(task_t, thread_t);
697 extern void uthread_cleanup(task_t, void *, void *);
698 extern void uthread_zone_free(void *);
699 extern void uthread_cred_free(void *);
700
701 extern boolean_t thread_should_halt(
702 thread_t thread);
703
704 extern int is_64signalregset(void);
705
706 void act_set_apc(thread_t);
707
708 extern uint32_t dtrace_get_thread_predcache(thread_t);
709 extern int64_t dtrace_get_thread_vtime(thread_t);
710 extern int64_t dtrace_get_thread_tracing(thread_t);
711 extern boolean_t dtrace_get_thread_reentering(thread_t);
712 extern vm_offset_t dtrace_get_kernel_stack(thread_t);
713 extern void dtrace_set_thread_predcache(thread_t, uint32_t);
714 extern void dtrace_set_thread_vtime(thread_t, int64_t);
715 extern void dtrace_set_thread_tracing(thread_t, int64_t);
716 extern void dtrace_set_thread_reentering(thread_t, boolean_t);
717 extern vm_offset_t dtrace_set_thread_recover(thread_t, vm_offset_t);
718
719 extern int64_t dtrace_calc_thread_recent_vtime(thread_t);
720
721
722 extern void thread_set_wq_state32(
723 thread_t thread,
724 thread_state_t tstate);
725
726 extern void thread_set_wq_state64(
727 thread_t thread,
728 thread_state_t tstate);
729
730 #endif /* XNU_KERNEL_PRIVATE */
731
732 extern kern_return_t kernel_thread_start(
733 thread_continue_t continuation,
734 void *parameter,
735 thread_t *new_thread);
736
737 __END_DECLS
738
739 #endif /* _KERN_THREAD_H_ */
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