2 * mono-threads.c: Low-level threading
5 * Rodrigo Kumpera (kumpera@gmail.com)
7 * Copyright 2011 Novell, Inc (http://www.novell.com)
8 * Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
9 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
14 /* enable pthread extensions */
16 #define _DARWIN_C_SOURCE
19 #include <mono/utils/mono-compiler.h>
20 #include <mono/utils/mono-os-semaphore.h>
21 #include <mono/utils/mono-threads.h>
22 #include <mono/utils/mono-tls.h>
23 #include <mono/utils/hazard-pointer.h>
24 #include <mono/utils/mono-memory-model.h>
25 #include <mono/utils/mono-mmap.h>
26 #include <mono/utils/atomic.h>
27 #include <mono/utils/mono-time.h>
28 #include <mono/utils/mono-lazy-init.h>
29 #include <mono/utils/mono-coop-mutex.h>
30 #include <mono/utils/mono-coop-semaphore.h>
31 #include <mono/utils/mono-threads-coop.h>
36 #include <mono/utils/mach-support.h>
40 Mutex that makes sure only a single thread can be suspending others.
41 Suspend is a very racy operation since it requires restarting until
42 the target thread is not on an unsafe region.
44 We could implement this using critical regions, but would be much much
45 harder for an operation that is hardly performance critical.
47 The GC has to acquire this lock before starting a STW to make sure
48 a runtime suspend won't make it wronly see a thread in a safepoint
49 when it is in fact not.
51 This has to be a naked locking primitive, and not a coop aware one, as
52 it needs to be usable when destroying thread_info_key, the TLS key for
53 the current MonoThreadInfo. In this case, mono_thread_info_current_unchecked,
54 (which is used inside MONO_ENTER_GC_SAFE), would return NULL, leading
55 to an assertion error. We then simply switch state manually in
56 mono_thread_info_suspend_lock_with_info.
58 static MonoSemType global_suspend_semaphore;
60 static size_t thread_info_size;
61 static MonoThreadInfoCallbacks threads_callbacks;
62 static MonoThreadInfoRuntimeCallbacks runtime_callbacks;
63 static MonoNativeTlsKey thread_info_key, thread_exited_key;
65 static __thread guint32 tls_small_id MONO_TLS_FAST;
67 static MonoNativeTlsKey small_id_key;
69 static MonoLinkedListSet thread_list;
70 static gboolean mono_threads_inited = FALSE;
72 static MonoSemType suspend_semaphore;
73 static size_t pending_suspends;
74 static gboolean unified_suspend_enabled;
76 #define mono_thread_info_run_state(info) (((MonoThreadInfo*)info)->thread_state & THREAD_STATE_MASK)
79 #define SLEEP_DURATION_BEFORE_WARNING (50)
81 #define SLEEP_DURATION_BEFORE_ABORT MONO_INFINITE_WAIT
83 static guint32 sleepWarnDuration = SLEEP_DURATION_BEFORE_WARNING,
84 sleepAbortDuration = SLEEP_DURATION_BEFORE_ABORT;
86 static int suspend_posts, resume_posts, abort_posts, waits_done, pending_ops;
89 mono_threads_notify_initiator_of_abort (MonoThreadInfo* info)
91 THREADS_SUSPEND_DEBUG ("[INITIATOR-NOTIFY-ABORT] %p\n", mono_thread_info_get_tid (info));
92 InterlockedIncrement (&abort_posts);
93 mono_os_sem_post (&suspend_semaphore);
97 mono_threads_notify_initiator_of_suspend (MonoThreadInfo* info)
99 THREADS_SUSPEND_DEBUG ("[INITIATOR-NOTIFY-SUSPEND] %p\n", mono_thread_info_get_tid (info));
100 InterlockedIncrement (&suspend_posts);
101 mono_os_sem_post (&suspend_semaphore);
105 mono_threads_notify_initiator_of_resume (MonoThreadInfo* info)
107 THREADS_SUSPEND_DEBUG ("[INITIATOR-NOTIFY-RESUME] %p\n", mono_thread_info_get_tid (info));
108 InterlockedIncrement (&resume_posts);
109 mono_os_sem_post (&suspend_semaphore);
113 begin_async_suspend (MonoThreadInfo *info, gboolean interrupt_kernel)
115 if (mono_threads_is_coop_enabled ()) {
116 /* There's nothing else to do after we async request the thread to suspend */
117 mono_threads_add_to_pending_operation_set (info);
121 return mono_threads_suspend_begin_async_suspend (info, interrupt_kernel);
125 check_async_suspend (MonoThreadInfo *info)
127 if (mono_threads_is_coop_enabled ()) {
128 /* Async suspend can't async fail on coop */
132 return mono_threads_suspend_check_suspend_result (info);
136 resume_async_suspended (MonoThreadInfo *info)
138 if (mono_threads_is_coop_enabled ())
139 g_assert_not_reached ();
141 g_assert (mono_threads_suspend_begin_async_resume (info));
145 resume_self_suspended (MonoThreadInfo* info)
147 THREADS_SUSPEND_DEBUG ("**BEGIN self-resume %p\n", mono_thread_info_get_tid (info));
148 mono_os_sem_post (&info->resume_semaphore);
152 mono_thread_info_wait_for_resume (MonoThreadInfo* info)
155 THREADS_SUSPEND_DEBUG ("**WAIT self-resume %p\n", mono_thread_info_get_tid (info));
156 res = mono_os_sem_wait (&info->resume_semaphore, MONO_SEM_FLAGS_NONE);
157 g_assert (res != -1);
161 resume_blocking_suspended (MonoThreadInfo* info)
163 THREADS_SUSPEND_DEBUG ("**BEGIN blocking-resume %p\n", mono_thread_info_get_tid (info));
164 mono_os_sem_post (&info->resume_semaphore);
168 mono_threads_add_to_pending_operation_set (MonoThreadInfo* info)
170 THREADS_SUSPEND_DEBUG ("added %p to pending suspend\n", mono_thread_info_get_tid (info));
172 InterlockedIncrement (&pending_ops);
176 mono_threads_begin_global_suspend (void)
178 size_t ps = pending_suspends;
179 if (G_UNLIKELY (ps != 0))
180 g_error ("pending_suspends = %d, but must be 0", ps);
181 THREADS_SUSPEND_DEBUG ("------ BEGIN GLOBAL OP sp %d rp %d ap %d wd %d po %d (sp + rp + ap == wd) (wd == po)\n", suspend_posts, resume_posts,
182 abort_posts, waits_done, pending_ops);
183 g_assert ((suspend_posts + resume_posts + abort_posts) == waits_done);
184 mono_threads_coop_begin_global_suspend ();
188 mono_threads_end_global_suspend (void)
190 size_t ps = pending_suspends;
191 if (G_UNLIKELY (ps != 0))
192 g_error ("pending_suspends = %d, but must be 0", ps);
193 THREADS_SUSPEND_DEBUG ("------ END GLOBAL OP sp %d rp %d ap %d wd %d po %d\n", suspend_posts, resume_posts,
194 abort_posts, waits_done, pending_ops);
195 g_assert ((suspend_posts + resume_posts + abort_posts) == waits_done);
196 mono_threads_coop_end_global_suspend ();
202 MonoThreadInfo *cur = mono_thread_info_current ();
204 MOSTLY_ASYNC_SAFE_PRINTF ("STATE CUE CARD: (? means a positive number, usually 1 or 2, * means any number)\n");
205 MOSTLY_ASYNC_SAFE_PRINTF ("\t0x0\t- starting (GOOD, unless the thread is running managed code)\n");
206 MOSTLY_ASYNC_SAFE_PRINTF ("\t0x1\t- running (BAD, unless it's the gc thread)\n");
207 MOSTLY_ASYNC_SAFE_PRINTF ("\t0x2\t- detached (GOOD, unless the thread is running managed code)\n");
208 MOSTLY_ASYNC_SAFE_PRINTF ("\t0x?03\t- async suspended (GOOD)\n");
209 MOSTLY_ASYNC_SAFE_PRINTF ("\t0x?04\t- self suspended (GOOD)\n");
210 MOSTLY_ASYNC_SAFE_PRINTF ("\t0x?05\t- async suspend requested (BAD)\n");
211 MOSTLY_ASYNC_SAFE_PRINTF ("\t0x?06\t- self suspend requested (BAD)\n");
212 MOSTLY_ASYNC_SAFE_PRINTF ("\t0x*07\t- blocking (GOOD)\n");
213 MOSTLY_ASYNC_SAFE_PRINTF ("\t0x?08\t- blocking with pending suspend (GOOD)\n");
215 FOREACH_THREAD_SAFE (info) {
217 char thread_name [256] = { 0 };
218 pthread_getname_np (mono_thread_info_get_tid (info), thread_name, 255);
220 MOSTLY_ASYNC_SAFE_PRINTF ("--thread %p id %p [%p] (%s) state %x %s\n", info, (void *) mono_thread_info_get_tid (info), (void*)(size_t)info->native_handle, thread_name, info->thread_state, info == cur ? "GC INITIATOR" : "" );
222 MOSTLY_ASYNC_SAFE_PRINTF ("--thread %p id %p [%p] state %x %s\n", info, (void *) mono_thread_info_get_tid (info), (void*)(size_t)info->native_handle, info->thread_state, info == cur ? "GC INITIATOR" : "" );
224 } FOREACH_THREAD_SAFE_END
228 mono_threads_wait_pending_operations (void)
231 int c = pending_suspends;
233 /* Wait threads to park */
234 THREADS_SUSPEND_DEBUG ("[INITIATOR-WAIT-COUNT] %d\n", c);
235 if (pending_suspends) {
236 MonoStopwatch suspension_time;
237 mono_stopwatch_start (&suspension_time);
238 for (i = 0; i < pending_suspends; ++i) {
239 THREADS_SUSPEND_DEBUG ("[INITIATOR-WAIT-WAITING]\n");
240 InterlockedIncrement (&waits_done);
241 if (mono_os_sem_timedwait (&suspend_semaphore, sleepAbortDuration, MONO_SEM_FLAGS_NONE) == MONO_SEM_TIMEDWAIT_RET_SUCCESS)
243 mono_stopwatch_stop (&suspension_time);
247 MOSTLY_ASYNC_SAFE_PRINTF ("WAITING for %d threads, got %d suspended\n", (int)pending_suspends, i);
248 g_error ("suspend_thread suspend took %d ms, which is more than the allowed %d ms", (int)mono_stopwatch_elapsed_ms (&suspension_time), sleepAbortDuration);
250 mono_stopwatch_stop (&suspension_time);
251 THREADS_SUSPEND_DEBUG ("Suspending %d threads took %d ms.\n", (int)pending_suspends, (int)mono_stopwatch_elapsed_ms (&suspension_time));
255 pending_suspends = 0;
261 //Thread initialization code
263 static void mono_threads_unregister_current_thread (MonoThreadInfo *info);
266 mono_hazard_pointer_clear_all (MonoThreadHazardPointers *hp, int retain)
269 mono_hazard_pointer_clear (hp, 0);
271 mono_hazard_pointer_clear (hp, 1);
273 mono_hazard_pointer_clear (hp, 2);
277 If return non null Hazard Pointer 1 holds the return value.
280 mono_thread_info_lookup (MonoNativeThreadId id)
282 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
284 if (!mono_lls_find (&thread_list, hp, (uintptr_t)id)) {
285 mono_hazard_pointer_clear_all (hp, -1);
289 mono_hazard_pointer_clear_all (hp, 1);
290 return (MonoThreadInfo *) mono_hazard_pointer_get_val (hp, 1);
294 mono_thread_info_insert (MonoThreadInfo *info)
296 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
298 if (!mono_lls_insert (&thread_list, hp, (MonoLinkedListSetNode*)info)) {
299 mono_hazard_pointer_clear_all (hp, -1);
303 mono_hazard_pointer_clear_all (hp, -1);
308 mono_thread_info_remove (MonoThreadInfo *info)
310 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
313 THREADS_DEBUG ("removing info %p\n", info);
314 res = mono_lls_remove (&thread_list, hp, (MonoLinkedListSetNode*)info);
315 mono_hazard_pointer_clear_all (hp, -1);
320 free_thread_info (gpointer mem)
322 MonoThreadInfo *info = (MonoThreadInfo *) mem;
324 mono_os_sem_destroy (&info->resume_semaphore);
325 mono_threads_suspend_free (info);
331 mono_thread_info_register_small_id (void)
333 int small_id = mono_thread_small_id_alloc ();
334 #ifdef HAVE_KW_THREAD
335 tls_small_id = small_id;
337 mono_native_tls_set_value (small_id_key, GUINT_TO_POINTER (small_id + 1));
343 register_thread (MonoThreadInfo *info, gpointer baseptr)
346 guint8 *staddr = NULL;
347 int small_id = mono_thread_info_register_small_id ();
349 mono_thread_info_set_tid (info, mono_native_thread_id_get ());
350 info->small_id = small_id;
352 mono_os_sem_init (&info->resume_semaphore, 0);
354 /*set TLS early so SMR works */
355 mono_native_tls_set_value (thread_info_key, info);
357 THREADS_DEBUG ("registering info %p tid %p small id %x\n", info, mono_thread_info_get_tid (info), info->small_id);
359 if (threads_callbacks.thread_register) {
360 if (threads_callbacks.thread_register (info, baseptr) == NULL) {
361 // g_warning ("thread registation failed\n");
362 mono_native_tls_set_value (thread_info_key, NULL);
368 mono_thread_info_get_stack_bounds (&staddr, &stsize);
371 info->stack_start_limit = staddr;
372 info->stack_end = staddr + stsize;
374 info->stackdata = g_byte_array_new ();
376 mono_threads_platform_register (info);
377 mono_threads_suspend_register (info);
380 Transition it before taking any locks or publishing itself to reduce the chance
381 of others witnessing a detached thread.
382 We can reasonably expect that until this thread gets published, no other thread will
383 try to manipulate it.
385 mono_threads_transition_attach (info);
386 mono_thread_info_suspend_lock ();
387 /*If this fail it means a given thread has been registered twice, which doesn't make sense. */
388 result = mono_thread_info_insert (info);
390 mono_thread_info_suspend_unlock ();
395 mono_thread_info_suspend_lock_with_info (MonoThreadInfo *info);
398 unregister_thread (void *arg)
400 gpointer gc_unsafe_stackdata;
401 MonoThreadInfo *info;
404 info = (MonoThreadInfo *) arg;
406 g_assert (mono_thread_info_is_current (info));
407 g_assert (mono_thread_info_is_live (info));
409 small_id = info->small_id;
411 /* We only enter the GC unsafe region, as when exiting this function, the thread
412 * will be detached, and the current MonoThreadInfo* will be destroyed. */
413 mono_threads_enter_gc_unsafe_region_unbalanced_with_info (info, &gc_unsafe_stackdata);
415 THREADS_DEBUG ("unregistering info %p\n", info);
417 mono_native_tls_set_value (thread_exited_key, GUINT_TO_POINTER (1));
419 mono_threads_platform_unregister (info);
422 * TLS destruction order is not reliable so small_id might be cleaned up
425 #ifndef HAVE_KW_THREAD
426 mono_native_tls_set_value (small_id_key, GUINT_TO_POINTER (info->small_id + 1));
430 First perform the callback that requires no locks.
431 This callback has the potential of taking other locks, so we do it before.
432 After it completes, the thread remains functional.
434 if (threads_callbacks.thread_detach)
435 threads_callbacks.thread_detach (info);
437 mono_thread_info_suspend_lock_with_info (info);
440 Now perform the callback that must be done under locks.
441 This will render the thread useless and non-suspendable, so it must
442 be done while holding the suspend lock to give no other thread chance
445 if (threads_callbacks.thread_unregister)
446 threads_callbacks.thread_unregister (info);
447 mono_threads_unregister_current_thread (info);
448 mono_threads_transition_detach (info);
450 mono_thread_info_suspend_unlock ();
452 g_byte_array_free (info->stackdata, /*free_segment=*/TRUE);
454 /*now it's safe to free the thread info.*/
455 mono_thread_hazardous_try_free (info, free_thread_info);
456 /* Pump the HP queue */
457 mono_thread_hazardous_try_free_some ();
459 mono_thread_small_id_free (small_id);
463 thread_exited_dtor (void *arg)
465 #if defined(__MACH__)
467 * Since we use pthread dtors to clean up thread data, if a thread
468 * is attached to the runtime by another pthread dtor after our dtor
469 * has ran, it will never be detached, leading to various problems
470 * since the thread ids etc. will be reused while they are still in
471 * the threads hashtables etc.
472 * Dtors are called in a loop until all user tls entries are 0,
473 * but the loop has a maximum count (4), so if we set the tls
474 * variable every time, it will remain set when system tls dtors
475 * are ran. This allows mono_thread_info_is_exiting () to detect
476 * whenever the thread is exiting, even if it is executed from a
477 * system tls dtor (i.e. obj-c dealloc methods).
479 mono_native_tls_set_value (thread_exited_key, GUINT_TO_POINTER (1));
484 * Removes the current thread from the thread list.
485 * This must be called from the thread unregister callback and nowhere else.
486 * The current thread must be passed as TLS might have already been cleaned up.
489 mono_threads_unregister_current_thread (MonoThreadInfo *info)
492 g_assert (mono_thread_info_get_tid (info) == mono_native_thread_id_get ());
493 result = mono_thread_info_remove (info);
498 mono_thread_info_current_unchecked (void)
500 return mono_threads_inited ? (MonoThreadInfo*)mono_native_tls_get_value (thread_info_key) : NULL;
505 mono_thread_info_current (void)
507 MonoThreadInfo *info = (MonoThreadInfo*)mono_native_tls_get_value (thread_info_key);
511 info = mono_thread_info_lookup (mono_native_thread_id_get ()); /*info on HP1*/
514 We might be called during thread cleanup, but we cannot be called after cleanup as happened.
515 The way to distinguish between before, during and after cleanup is the following:
517 -If the TLS key is set, cleanup has not begun;
518 -If the TLS key is clean, but the thread remains registered, cleanup is in progress;
519 -If the thread is nowhere to be found, cleanup has finished.
521 We cannot function after cleanup since there's no way to ensure what will happen.
525 /*We're looking up the current thread which will not be freed until we finish running, so no need to keep it on a HP */
526 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
532 mono_thread_info_get_small_id (void)
534 #ifdef HAVE_KW_THREAD
537 gpointer val = mono_native_tls_get_value (small_id_key);
540 return GPOINTER_TO_INT (val) - 1;
545 mono_thread_info_list_head (void)
551 * mono_threads_attach_tools_thread
553 * Attach the current thread as a tool thread. DON'T USE THIS FUNCTION WITHOUT READING ALL DISCLAIMERS.
555 * A tools thread is a very special kind of thread that needs access to core runtime facilities but should
556 * not be counted as a regular thread for high order facilities such as executing managed code or accessing
559 * This is intended only to tools such as a profiler than needs to be able to use our lock-free support when
560 * doing things like resolving backtraces in their background processing thread.
563 mono_threads_attach_tools_thread (void)
566 MonoThreadInfo *info;
568 /* Must only be called once */
569 g_assert (!mono_native_tls_get_value (thread_info_key));
571 while (!mono_threads_inited) {
572 mono_thread_info_usleep (10);
575 info = mono_thread_info_attach (&dummy);
578 info->tools_thread = TRUE;
582 mono_thread_info_attach (void *baseptr)
584 MonoThreadInfo *info;
585 if (!mono_threads_inited)
588 /* This can happen from DllMain(DLL_THREAD_ATTACH) on Windows, if a
589 * thread is created before an embedding API user initialized Mono. */
590 THREADS_DEBUG ("mono_thread_info_attach called before mono_threads_init\n");
593 g_assert (mono_threads_inited);
596 info = (MonoThreadInfo *) mono_native_tls_get_value (thread_info_key);
598 info = (MonoThreadInfo *) g_malloc0 (thread_info_size);
599 THREADS_DEBUG ("attaching %p\n", info);
600 if (!register_thread (info, baseptr))
602 } else if (threads_callbacks.thread_attach) {
603 threads_callbacks.thread_attach (info);
609 mono_thread_info_detach (void)
611 MonoThreadInfo *info;
612 if (!mono_threads_inited)
614 /* This can happen from DllMain(THREAD_DETACH) on Windows, if a thread
615 * is created before an embedding API user initialized Mono. */
616 THREADS_DEBUG ("mono_thread_info_detach called before mono_threads_init\n");
619 info = (MonoThreadInfo *) mono_native_tls_get_value (thread_info_key);
621 THREADS_DEBUG ("detaching %p\n", info);
622 unregister_thread (info);
623 mono_native_tls_set_value (thread_info_key, NULL);
628 * mono_thread_info_is_exiting:
630 * Return whenever the current thread is exiting, i.e. it is running pthread
634 mono_thread_info_is_exiting (void)
636 #if defined(__MACH__)
637 if (mono_native_tls_get_value (thread_exited_key) == GUINT_TO_POINTER (1))
645 thread_info_key_dtor (void *arg)
647 /* Put the MonoThreadInfo back for the duration of the
648 * unregister code. In some circumstances the thread needs to
649 * take the GC lock which may block which requires a coop
650 * state transition. */
651 mono_native_tls_set_value (thread_info_key, arg);
652 unregister_thread (arg);
653 mono_native_tls_set_value (thread_info_key, NULL);
658 mono_threads_init (MonoThreadInfoCallbacks *callbacks, size_t info_size)
661 threads_callbacks = *callbacks;
662 thread_info_size = info_size;
663 const char *sleepLimit;
665 res = mono_native_tls_alloc (&thread_info_key, NULL);
666 res = mono_native_tls_alloc (&thread_exited_key, NULL);
668 res = mono_native_tls_alloc (&thread_info_key, (void *) thread_info_key_dtor);
669 res = mono_native_tls_alloc (&thread_exited_key, (void *) thread_exited_dtor);
674 #ifndef HAVE_KW_THREAD
675 res = mono_native_tls_alloc (&small_id_key, NULL);
679 unified_suspend_enabled = g_getenv ("MONO_ENABLE_UNIFIED_SUSPEND") != NULL || mono_threads_is_coop_enabled ();
681 if ((sleepLimit = g_getenv ("MONO_SLEEP_ABORT_LIMIT")) != NULL) {
683 long threshold = strtol(sleepLimit, NULL, 10);
684 if ((errno == 0) && (threshold >= 40)) {
685 sleepAbortDuration = threshold;
686 sleepWarnDuration = threshold / 20;
688 g_warning("MONO_SLEEP_ABORT_LIMIT must be a number >= 40");
691 mono_os_sem_init (&global_suspend_semaphore, 1);
692 mono_os_sem_init (&suspend_semaphore, 0);
694 mono_lls_init (&thread_list, NULL);
695 mono_thread_smr_init ();
696 mono_threads_platform_init ();
697 mono_threads_suspend_init ();
698 mono_threads_coop_init ();
699 mono_threads_abort_syscall_init ();
701 #if defined(__MACH__)
702 mono_mach_init (thread_info_key);
705 mono_threads_inited = TRUE;
707 g_assert (sizeof (MonoNativeThreadId) <= sizeof (uintptr_t));
711 mono_threads_runtime_init (MonoThreadInfoRuntimeCallbacks *callbacks)
713 runtime_callbacks = *callbacks;
716 MonoThreadInfoRuntimeCallbacks *
717 mono_threads_get_runtime_callbacks (void)
719 return &runtime_callbacks;
723 Signal that the current thread wants to be suspended.
724 This function can be called without holding the suspend lock held.
725 To finish suspending, call mono_suspend_check.
728 mono_thread_info_begin_self_suspend (void)
730 MonoThreadInfo *info = mono_thread_info_current_unchecked ();
734 THREADS_SUSPEND_DEBUG ("BEGIN SELF SUSPEND OF %p\n", info);
735 mono_threads_transition_request_self_suspension (info);
739 mono_thread_info_end_self_suspend (void)
741 MonoThreadInfo *info;
743 info = mono_thread_info_current ();
746 THREADS_SUSPEND_DEBUG ("FINISH SELF SUSPEND OF %p\n", info);
748 mono_threads_get_runtime_callbacks ()->thread_state_init (&info->thread_saved_state [SELF_SUSPEND_STATE_INDEX]);
750 /* commit the saved state and notify others if needed */
751 switch (mono_threads_transition_state_poll (info)) {
752 case SelfSuspendResumed:
754 case SelfSuspendWait:
755 mono_thread_info_wait_for_resume (info);
757 case SelfSuspendNotifyAndWait:
758 mono_threads_notify_initiator_of_suspend (info);
759 mono_thread_info_wait_for_resume (info);
760 mono_threads_notify_initiator_of_resume (info);
766 mono_thread_info_core_resume (MonoThreadInfo *info)
768 gboolean res = FALSE;
769 if (info->create_suspended) {
770 /* Have to special case this, as the normal suspend/resume pair are racy, they don't work if he resume is received before the suspend */
771 info->create_suspended = FALSE;
772 mono_coop_sem_post (&info->create_suspended_sem);
776 switch (mono_threads_transition_request_resume (info)) {
783 case ResumeInitSelfResume:
784 resume_self_suspended (info);
787 case ResumeInitAsyncResume:
788 resume_async_suspended (info);
791 case ResumeInitBlockingResume:
792 resume_blocking_suspended (info);
801 mono_thread_info_resume (MonoNativeThreadId tid)
803 gboolean result; /* don't initialize it so the compiler can catch unitilized paths. */
804 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
805 MonoThreadInfo *info;
807 THREADS_SUSPEND_DEBUG ("RESUMING tid %p\n", (void*)tid);
809 mono_thread_info_suspend_lock ();
811 info = mono_thread_info_lookup (tid); /*info on HP1*/
817 result = mono_thread_info_core_resume (info);
819 //Wait for the pending resume to finish
820 mono_threads_wait_pending_operations ();
823 mono_thread_info_suspend_unlock ();
824 mono_hazard_pointer_clear (hp, 1);
829 mono_thread_info_begin_suspend (MonoThreadInfo *info)
831 switch (mono_threads_transition_request_async_suspension (info)) {
832 case AsyncSuspendAlreadySuspended:
833 case AsyncSuspendBlocking:
835 case AsyncSuspendWait:
836 mono_threads_add_to_pending_operation_set (info);
838 case AsyncSuspendInitSuspend:
839 return begin_async_suspend (info, FALSE);
841 g_assert_not_reached ();
846 mono_thread_info_begin_resume (MonoThreadInfo *info)
848 return mono_thread_info_core_resume (info);
852 FIXME fix cardtable WB to be out of line and check with the runtime if the target is not the
853 WB trampoline. Another option is to encode wb ranges in MonoJitInfo, but that is somewhat hard.
856 is_thread_in_critical_region (MonoThreadInfo *info)
860 gpointer stack_start;
861 MonoThreadUnwindState *state;
863 /* Are we inside a system critical region? */
864 if (info->inside_critical_region)
867 /* Are we inside a GC critical region? */
868 if (threads_callbacks.mono_thread_in_critical_region && threads_callbacks.mono_thread_in_critical_region (info)) {
872 /* The target thread might be shutting down and the domain might be null, which means no managed code left to run. */
873 state = mono_thread_info_get_suspend_state (info);
874 if (!state->unwind_data [MONO_UNWIND_DATA_DOMAIN])
877 stack_start = MONO_CONTEXT_GET_SP (&state->ctx);
878 /* altstack signal handler, sgen can't handle them, so we treat them as critical */
879 if (stack_start < info->stack_start_limit || stack_start >= info->stack_end)
882 ji = mono_jit_info_table_find (
883 (MonoDomain *) state->unwind_data [MONO_UNWIND_DATA_DOMAIN],
884 (char *) MONO_CONTEXT_GET_IP (&state->ctx));
889 method = mono_jit_info_get_method (ji);
891 return threads_callbacks.mono_method_is_critical (method);
895 mono_thread_info_in_critical_location (MonoThreadInfo *info)
897 return is_thread_in_critical_region (info);
901 The return value is only valid until a matching mono_thread_info_resume is called
903 static MonoThreadInfo*
904 suspend_sync (MonoNativeThreadId tid, gboolean interrupt_kernel)
906 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
907 MonoThreadInfo *info = mono_thread_info_lookup (tid); /*info on HP1*/
911 switch (mono_threads_transition_request_async_suspension (info)) {
912 case AsyncSuspendAlreadySuspended:
913 mono_hazard_pointer_clear (hp, 1); //XXX this is questionable we got to clean the suspend/resume nonsense of critical sections
915 case AsyncSuspendWait:
916 mono_threads_add_to_pending_operation_set (info);
918 case AsyncSuspendInitSuspend:
919 if (!begin_async_suspend (info, interrupt_kernel)) {
920 mono_hazard_pointer_clear (hp, 1);
924 case AsyncSuspendBlocking:
925 if (interrupt_kernel)
926 mono_threads_suspend_abort_syscall (info);
930 g_assert_not_reached ();
933 //Wait for the pending suspend to finish
934 mono_threads_wait_pending_operations ();
936 if (!check_async_suspend (info)) {
937 mono_thread_info_core_resume (info);
938 mono_threads_wait_pending_operations ();
939 mono_hazard_pointer_clear (hp, 1);
945 static MonoThreadInfo*
946 suspend_sync_nolock (MonoNativeThreadId id, gboolean interrupt_kernel)
948 MonoThreadInfo *info = NULL;
949 int sleep_duration = 0;
951 if (!(info = suspend_sync (id, interrupt_kernel))) {
952 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
956 /*WARNING: We now are in interrupt context until we resume the thread. */
957 if (!is_thread_in_critical_region (info))
960 if (!mono_thread_info_core_resume (info)) {
961 mono_hazard_pointer_clear (mono_hazard_pointer_get (), 1);
964 THREADS_SUSPEND_DEBUG ("RESTARTED thread tid %p\n", (void*)id);
966 /* Wait for the pending resume to finish */
967 mono_threads_wait_pending_operations ();
969 if (sleep_duration == 0)
970 mono_thread_info_yield ();
972 g_usleep (sleep_duration);
974 sleep_duration += 10;
980 mono_thread_info_safe_suspend_and_run (MonoNativeThreadId id, gboolean interrupt_kernel, MonoSuspendThreadCallback callback, gpointer user_data)
983 MonoThreadInfo *info = NULL;
984 MonoThreadHazardPointers *hp = mono_hazard_pointer_get ();
986 THREADS_SUSPEND_DEBUG ("SUSPENDING tid %p\n", (void*)id);
987 /*FIXME: unify this with self-suspend*/
988 g_assert (id != mono_native_thread_id_get ());
990 /* This can block during stw */
991 mono_thread_info_suspend_lock ();
992 mono_threads_begin_global_suspend ();
994 info = suspend_sync_nolock (id, interrupt_kernel);
998 switch (result = callback (info, user_data)) {
999 case MonoResumeThread:
1000 mono_hazard_pointer_set (hp, 1, info);
1001 mono_thread_info_core_resume (info);
1002 mono_threads_wait_pending_operations ();
1007 g_error ("Invalid suspend_and_run callback return value %d", result);
1011 mono_hazard_pointer_clear (hp, 1);
1012 mono_threads_end_global_suspend ();
1013 mono_thread_info_suspend_unlock ();
1017 Inject an assynchronous call into the target thread. The target thread must be suspended and
1018 only a single async call can be setup for a given suspend cycle.
1019 This async call must cause stack unwinding as the current implementation doesn't save enough state
1020 to resume execution of the top-of-stack function. It's an acceptable limitation since this is
1021 currently used only to deliver exceptions.
1024 mono_thread_info_setup_async_call (MonoThreadInfo *info, void (*target_func)(void*), void *user_data)
1026 /* An async call can only be setup on an async suspended thread */
1027 g_assert (mono_thread_info_run_state (info) == STATE_ASYNC_SUSPENDED);
1028 /*FIXME this is a bad assert, we probably should do proper locking and fail if one is already set*/
1029 g_assert (!info->async_target);
1030 info->async_target = target_func;
1031 /* This is not GC tracked */
1032 info->user_data = user_data;
1036 The suspend lock is held during any suspend in progress.
1037 A GC that has safepoints must take this lock as part of its
1038 STW to make sure no unsafe pending suspend is in progress.
1042 mono_thread_info_suspend_lock_with_info (MonoThreadInfo *info)
1045 g_assert (mono_thread_info_is_current (info));
1046 g_assert (mono_thread_info_is_live (info));
1048 MONO_ENTER_GC_SAFE_WITH_INFO(info);
1050 int res = mono_os_sem_wait (&global_suspend_semaphore, MONO_SEM_FLAGS_NONE);
1051 g_assert (res != -1);
1053 MONO_EXIT_GC_SAFE_WITH_INFO;
1057 mono_thread_info_suspend_lock (void)
1059 mono_thread_info_suspend_lock_with_info (mono_thread_info_current_unchecked ());
1063 mono_thread_info_suspend_unlock (void)
1065 mono_os_sem_post (&global_suspend_semaphore);
1069 * This is a very specific function whose only purpose is to
1070 * break a given thread from socket syscalls.
1072 * This only exists because linux won't fail a call to connect
1073 * if the underlying is closed.
1075 * TODO We should cleanup and unify this with the other syscall abort
1079 mono_thread_info_abort_socket_syscall_for_close (MonoNativeThreadId tid)
1081 MonoThreadHazardPointers *hp;
1082 MonoThreadInfo *info;
1084 if (tid == mono_native_thread_id_get () || !mono_threads_suspend_needs_abort_syscall ())
1087 hp = mono_hazard_pointer_get ();
1088 info = mono_thread_info_lookup (tid);
1092 if (mono_thread_info_run_state (info) == STATE_DETACHED) {
1093 mono_hazard_pointer_clear (hp, 1);
1097 mono_thread_info_suspend_lock ();
1098 mono_threads_begin_global_suspend ();
1100 mono_threads_suspend_abort_syscall (info);
1101 mono_threads_wait_pending_operations ();
1103 mono_hazard_pointer_clear (hp, 1);
1105 mono_threads_end_global_suspend ();
1106 mono_thread_info_suspend_unlock ();
1110 mono_thread_info_unified_management_enabled (void)
1112 return unified_suspend_enabled;
1116 * mono_thread_info_set_is_async_context:
1118 * Set whenever the current thread is in an async context. Some runtime functions might behave
1119 * differently while in an async context in order to be async safe.
1122 mono_thread_info_set_is_async_context (gboolean async_context)
1124 MonoThreadInfo *info = mono_thread_info_current ();
1127 info->is_async_context = async_context;
1131 mono_thread_info_is_async_context (void)
1133 MonoThreadInfo *info = mono_thread_info_current ();
1136 return info->is_async_context;
1143 MonoThreadStart start_routine;
1144 gpointer start_routine_arg;
1145 gboolean create_suspended;
1147 MonoCoopSem registered;
1148 MonoThreadInfo *info;
1152 inner_start_thread (gpointer data)
1154 CreateThreadData *thread_data;
1155 MonoThreadInfo *info;
1156 MonoThreadStart start_routine;
1157 gpointer start_routine_arg;
1158 guint32 start_routine_res;
1159 gboolean create_suspended;
1164 thread_data = (CreateThreadData*) data;
1165 g_assert (thread_data);
1167 start_routine = thread_data->start_routine;
1168 start_routine_arg = thread_data->start_routine_arg;
1170 create_suspended = thread_data->create_suspended;
1171 priority = thread_data->priority;
1173 info = mono_thread_info_attach (&dummy);
1174 info->runtime_thread = TRUE;
1176 mono_threads_platform_set_priority (info, priority);
1178 if (create_suspended) {
1179 info->create_suspended = TRUE;
1180 mono_coop_sem_init (&info->create_suspended_sem, 0);
1183 thread_data->info = info;
1185 mono_coop_sem_post (&thread_data->registered);
1187 if (InterlockedDecrement (&thread_data->ref) == 0) {
1188 mono_coop_sem_destroy (&thread_data->registered);
1189 g_free (thread_data);
1192 /* thread_data is not valid anymore */
1195 if (create_suspended) {
1196 res = mono_coop_sem_wait (&info->create_suspended_sem, MONO_SEM_FLAGS_NONE);
1197 g_assert (res == 0);
1199 mono_coop_sem_destroy (&info->create_suspended_sem);
1202 /* Run the actual main function of the thread */
1203 start_routine_res = start_routine (start_routine_arg);
1205 mono_threads_platform_exit (start_routine_res);
1207 g_assert_not_reached ();
1211 * mono_threads_create_thread:
1213 * Create a new thread executing START with argument ARG. Store its id into OUT_TID.
1214 * Returns: a windows or io-layer handle for the thread.
1217 mono_threads_create_thread (MonoThreadStart start, gpointer arg, MonoThreadParm *tp, MonoNativeThreadId *out_tid)
1219 CreateThreadData *thread_data;
1220 MonoThreadInfo *info;
1224 thread_data = g_new0 (CreateThreadData, 1);
1225 thread_data->ref = 2;
1226 thread_data->start_routine = start;
1227 thread_data->start_routine_arg = arg;
1228 thread_data->create_suspended = tp->creation_flags & CREATE_SUSPENDED;
1229 thread_data->priority = tp->priority;
1230 mono_coop_sem_init (&thread_data->registered, 0);
1232 res = mono_threads_platform_create_thread (inner_start_thread, (gpointer) thread_data, tp->stack_size, out_tid);
1234 /* ref is not going to be decremented in inner_start_thread */
1235 InterlockedDecrement (&thread_data->ref);
1240 res = mono_coop_sem_wait (&thread_data->registered, MONO_SEM_FLAGS_NONE);
1241 g_assert (res == 0);
1243 info = thread_data->info;
1250 if (InterlockedDecrement (&thread_data->ref) == 0) {
1251 mono_coop_sem_destroy (&thread_data->registered);
1252 g_free (thread_data);
1259 * mono_thread_info_get_stack_bounds:
1261 * Return the address and size of the current threads stack. Return NULL as the
1262 * stack address if the stack address cannot be determined.
1265 mono_thread_info_get_stack_bounds (guint8 **staddr, size_t *stsize)
1267 guint8 *current = (guint8 *)&stsize;
1268 mono_threads_platform_get_stack_bounds (staddr, stsize);
1272 /* Sanity check the result */
1273 g_assert ((current > *staddr) && (current < *staddr + *stsize));
1275 /* When running under emacs, sometimes staddr is not aligned to a page size */
1276 *staddr = (guint8*)((gssize)*staddr & ~(mono_pagesize () - 1));
1280 mono_thread_info_yield (void)
1282 return mono_threads_platform_yield ();
1284 static mono_lazy_init_t sleep_init = MONO_LAZY_INIT_STATUS_NOT_INITIALIZED;
1285 static MonoCoopMutex sleep_mutex;
1286 static MonoCoopCond sleep_cond;
1289 sleep_initialize (void)
1291 mono_coop_mutex_init (&sleep_mutex);
1292 mono_coop_cond_init (&sleep_cond);
1296 sleep_interrupt (gpointer data)
1298 mono_coop_mutex_lock (&sleep_mutex);
1299 mono_coop_cond_broadcast (&sleep_cond);
1300 mono_coop_mutex_unlock (&sleep_mutex);
1303 static inline guint32
1304 sleep_interruptable (guint32 ms, gboolean *alerted)
1308 g_assert (INFINITE == G_MAXUINT32);
1314 end = mono_100ns_ticks () + (ms * 1000 * 10);
1316 mono_lazy_initialize (&sleep_init, sleep_initialize);
1318 mono_coop_mutex_lock (&sleep_mutex);
1321 if (ms != INFINITE) {
1322 now = mono_100ns_ticks ();
1327 mono_thread_info_install_interrupt (sleep_interrupt, NULL, alerted);
1329 mono_coop_mutex_unlock (&sleep_mutex);
1330 return WAIT_IO_COMPLETION;
1334 mono_coop_cond_timedwait (&sleep_cond, &sleep_mutex, (end - now) / 10 / 1000);
1336 mono_coop_cond_wait (&sleep_cond, &sleep_mutex);
1338 mono_thread_info_uninstall_interrupt (alerted);
1340 mono_coop_mutex_unlock (&sleep_mutex);
1341 return WAIT_IO_COMPLETION;
1345 mono_coop_mutex_unlock (&sleep_mutex);
1351 mono_thread_info_sleep (guint32 ms, gboolean *alerted)
1354 MonoThreadInfo *info;
1356 mono_thread_info_yield ();
1358 info = mono_thread_info_current ();
1359 if (info && mono_thread_info_is_interrupt_state (info))
1360 return WAIT_IO_COMPLETION;
1366 return sleep_interruptable (ms, alerted);
1370 if (ms == INFINITE) {
1373 Sleep (G_MAXUINT32);
1375 sleep (G_MAXUINT32);
1380 #if defined (__linux__) && !defined(PLATFORM_ANDROID)
1381 struct timespec start, target;
1383 /* Use clock_nanosleep () to prevent time drifting problems when nanosleep () is interrupted by signals */
1384 ret = clock_gettime (CLOCK_MONOTONIC, &start);
1385 g_assert (ret == 0);
1388 target.tv_sec += ms / 1000;
1389 target.tv_nsec += (ms % 1000) * 1000000;
1390 if (target.tv_nsec > 999999999) {
1391 target.tv_nsec -= 999999999;
1396 ret = clock_nanosleep (CLOCK_MONOTONIC, TIMER_ABSTIME, &target, NULL);
1401 struct timespec req, rem;
1403 req.tv_sec = ms / 1000;
1404 req.tv_nsec = (ms % 1000) * 1000000;
1407 memset (&rem, 0, sizeof (rem));
1408 ret = nanosleep (&req, &rem);
1410 #endif /* __linux__ */
1419 mono_thread_info_usleep (guint64 us)
1428 mono_thread_info_tls_get (THREAD_INFO_TYPE *info, MonoTlsKey key)
1430 return ((MonoThreadInfo*)info)->tls [key];
1434 * mono_threads_info_tls_set:
1436 * Set the TLS key to VALUE in the info structure. This can be used to obtain
1437 * values of TLS variables for threads other than the current thread.
1438 * This should only be used for infrequently changing TLS variables, and it should
1439 * be paired with setting the real TLS variable since this provides no GC tracking.
1442 mono_thread_info_tls_set (THREAD_INFO_TYPE *info, MonoTlsKey key, gpointer value)
1444 ((MonoThreadInfo*)info)->tls [key] = value;
1448 * mono_thread_info_exit:
1450 * Exit the current thread.
1451 * This function doesn't return.
1454 mono_thread_info_exit (void)
1456 mono_threads_platform_exit (0);
1460 * mono_threads_open_thread_handle:
1462 * Return a io-layer/win32 handle for the thread identified by HANDLE/TID.
1463 * The handle need to be closed by calling CloseHandle () when it is no
1467 mono_threads_open_thread_handle (HANDLE handle, MonoNativeThreadId tid)
1469 return mono_threads_platform_open_thread_handle (handle, tid);
1473 mono_threads_close_thread_handle (HANDLE handle)
1475 return mono_threads_platform_close_thread_handle (handle);
1478 #define INTERRUPT_STATE ((MonoThreadInfoInterruptToken*) (size_t) -1)
1480 struct _MonoThreadInfoInterruptToken {
1481 void (*callback) (gpointer data);
1486 * mono_thread_info_install_interrupt: install an interruption token for the current thread.
1488 * - @callback: must be able to be called from another thread and always cancel the wait
1489 * - @data: passed to the callback
1490 * - @interrupted: will be set to TRUE if a token is already installed, FALSE otherwise
1491 * if set to TRUE, it must mean that the thread is in interrupted state
1494 mono_thread_info_install_interrupt (void (*callback) (gpointer data), gpointer data, gboolean *interrupted)
1496 MonoThreadInfo *info;
1497 MonoThreadInfoInterruptToken *previous_token, *token;
1499 g_assert (callback);
1501 g_assert (interrupted);
1502 *interrupted = FALSE;
1504 info = mono_thread_info_current ();
1507 /* The memory of this token can be freed at 2 places:
1508 * - if the token is not interrupted: it will be freed in uninstall, as info->interrupt_token has not been replaced
1509 * by the INTERRUPT_STATE flag value, and it still contains the pointer to the memory location
1510 * - if the token is interrupted: it will be freed in finish, as the token is now owned by the prepare/finish
1511 * functions, and info->interrupt_token does not contains a pointer to the memory anymore */
1512 token = g_new0 (MonoThreadInfoInterruptToken, 1);
1513 token->callback = callback;
1516 previous_token = (MonoThreadInfoInterruptToken *)InterlockedCompareExchangePointer ((gpointer*) &info->interrupt_token, token, NULL);
1518 if (previous_token) {
1519 if (previous_token != INTERRUPT_STATE)
1520 g_error ("mono_thread_info_install_interrupt: previous_token should be INTERRUPT_STATE (%p), but it was %p", INTERRUPT_STATE, previous_token);
1524 *interrupted = TRUE;
1527 THREADS_INTERRUPT_DEBUG ("interrupt install tid %p token %p previous_token %p interrupted %s\n",
1528 mono_thread_info_get_tid (info), token, previous_token, *interrupted ? "TRUE" : "FALSE");
1532 mono_thread_info_uninstall_interrupt (gboolean *interrupted)
1534 MonoThreadInfo *info;
1535 MonoThreadInfoInterruptToken *previous_token;
1537 g_assert (interrupted);
1538 *interrupted = FALSE;
1540 info = mono_thread_info_current ();
1543 previous_token = (MonoThreadInfoInterruptToken *)InterlockedExchangePointer ((gpointer*) &info->interrupt_token, NULL);
1545 /* only the installer can uninstall the token */
1546 g_assert (previous_token);
1548 if (previous_token == INTERRUPT_STATE) {
1549 /* if it is interrupted, then it is going to be freed in finish interrupt */
1550 *interrupted = TRUE;
1552 g_free (previous_token);
1555 THREADS_INTERRUPT_DEBUG ("interrupt uninstall tid %p previous_token %p interrupted %s\n",
1556 mono_thread_info_get_tid (info), previous_token, *interrupted ? "TRUE" : "FALSE");
1559 static MonoThreadInfoInterruptToken*
1560 set_interrupt_state (MonoThreadInfo *info)
1562 MonoThreadInfoInterruptToken *token, *previous_token;
1566 /* Atomically obtain the token the thread is
1567 * waiting on, and change it to a flag value. */
1570 previous_token = info->interrupt_token;
1572 /* Already interrupted */
1573 if (previous_token == INTERRUPT_STATE) {
1578 token = previous_token;
1579 } while (InterlockedCompareExchangePointer ((gpointer*) &info->interrupt_token, INTERRUPT_STATE, previous_token) != previous_token);
1585 * mono_thread_info_prepare_interrupt:
1587 * The state of the thread info interrupt token is set to 'interrupted' which means that :
1588 * - if the thread calls one of the WaitFor functions, the function will return with
1589 * WAIT_IO_COMPLETION instead of waiting
1590 * - if the thread was waiting when this function was called, the wait will be broken
1592 * It is possible that the wait functions return WAIT_IO_COMPLETION, but the target thread
1593 * didn't receive the interrupt signal yet, in this case it should call the wait function
1594 * again. This essentially means that the target thread will busy wait until it is ready to
1595 * process the interruption.
1597 MonoThreadInfoInterruptToken*
1598 mono_thread_info_prepare_interrupt (MonoThreadInfo *info)
1600 MonoThreadInfoInterruptToken *token;
1602 token = set_interrupt_state (info);
1604 THREADS_INTERRUPT_DEBUG ("interrupt prepare tid %p token %p\n",
1605 mono_thread_info_get_tid (info), token);
1611 mono_thread_info_finish_interrupt (MonoThreadInfoInterruptToken *token)
1613 THREADS_INTERRUPT_DEBUG ("interrupt finish token %p\n", token);
1618 g_assert (token->callback);
1620 token->callback (token->data);
1626 mono_thread_info_self_interrupt (void)
1628 MonoThreadInfo *info;
1629 MonoThreadInfoInterruptToken *token;
1631 info = mono_thread_info_current ();
1634 token = set_interrupt_state (info);
1637 THREADS_INTERRUPT_DEBUG ("interrupt self tid %p\n",
1638 mono_thread_info_get_tid (info));
1641 /* Clear the interrupted flag of the current thread, set with
1642 * mono_thread_info_self_interrupt, so it can wait again */
1644 mono_thread_info_clear_self_interrupt ()
1646 MonoThreadInfo *info;
1647 MonoThreadInfoInterruptToken *previous_token;
1649 info = mono_thread_info_current ();
1652 previous_token = (MonoThreadInfoInterruptToken *)InterlockedCompareExchangePointer ((gpointer*) &info->interrupt_token, NULL, INTERRUPT_STATE);
1653 g_assert (previous_token == NULL || previous_token == INTERRUPT_STATE);
1655 THREADS_INTERRUPT_DEBUG ("interrupt clear self tid %p previous_token %p\n", mono_thread_info_get_tid (info), previous_token);
1659 mono_thread_info_is_interrupt_state (MonoThreadInfo *info)
1662 return InterlockedReadPointer ((gpointer*) &info->interrupt_token) == INTERRUPT_STATE;
1666 mono_thread_info_describe_interrupt_token (MonoThreadInfo *info, GString *text)
1670 if (!InterlockedReadPointer ((gpointer*) &info->interrupt_token))
1671 g_string_append_printf (text, "not waiting");
1672 else if (InterlockedReadPointer ((gpointer*) &info->interrupt_token) == INTERRUPT_STATE)
1673 g_string_append_printf (text, "interrupted state");
1675 g_string_append_printf (text, "waiting");
1679 mono_thread_info_is_current (MonoThreadInfo *info)
1681 return mono_thread_info_get_tid (info) == mono_native_thread_id_get ();
1685 mono_thread_info_set_exited (THREAD_INFO_TYPE *info)
1687 g_assert (mono_thread_info_is_current (info));
1688 mono_threads_platform_set_exited (info);
1692 mono_thread_info_get_handle (THREAD_INFO_TYPE *info)
1694 g_assert (info->handle);
1695 return info->handle;
1699 mono_thread_info_describe (MonoThreadInfo *info, GString *text)
1701 mono_threads_platform_describe (info, text);
1705 mono_thread_info_own_mutex (MonoThreadInfo *info, gpointer mutex_handle)
1707 mono_threads_platform_own_mutex (info, mutex_handle);
1711 mono_thread_info_disown_mutex (MonoThreadInfo *info, gpointer mutex_handle)
1713 mono_threads_platform_disown_mutex (info, mutex_handle);
1717 mono_thread_info_get_priority (MonoThreadInfo *info)
1719 return mono_threads_platform_get_priority (info);
1723 mono_thread_info_set_priority (MonoThreadInfo *info, MonoThreadPriority priority)
1725 mono_threads_platform_set_priority (info, priority);